JP6412199B2 - Refrigerant switching valve - Google Patents

Description

  The present invention relates to a refrigerant switching valve.

  As background arts in this technical field, Japanese Patent Application Laid-Open No. 2009-79837 (Patent Document 1), Japanese Patent No. 4694124 (Patent Document 2), Japanese Patent No. 4786822 (Patent Document 3), and Japanese Patent No. 3997036 (Patent Document) Document 4), Japanese Patent Publication No. 3-552 (Patent Document 5), Japanese Patent Application Laid-Open No. 2012-31877 (Patent Document 6), and Japanese Patent Application Laid-Open No. 2012-52578 (Patent Document 7).

  In the solution section of the summary of Patent Document 1, “Refrigerator has a heat insulation box having an opening, a heat insulation partition for dividing the inside of the heat insulation box into a plurality of storage rooms, a heat insulation door, and a refrigerant pipe. And a compressor, a condenser, and a first flow path for circulating the refrigerant from the compressor to the condenser, and the heat insulating partition is a heat insulating door when the heat insulating door closes the opening. And a partition dew condensation prevention pipe for circulating the refrigerant around the front surface of the thermal insulation partition, and the refrigerant is circulated in the first flow path or the compressor. It is disclosed that an electromagnetic four-way valve is provided for switching whether the refrigerant is circulated from the pipe to the condenser through the partition dew condensation prevention pipe.

  According to claim 1 of Patent Document 2, “having an inflow pipe for allowing fluid to flow in and an outflow pipe for allowing fluid to flow out, forming a part of the passage of the fluid, and internally connected to the inflow pipe or the outflow pipe A valve drive device having a valve body that opens and closes the opened valve port and interrupts the flow of the fluid, and a drive means for driving the valve body, wherein a plurality of the valve ports are provided. A plurality of valve bodies are provided so that one valve body corresponds to each valve port, and driven gears for driving the plurality of valve bodies are formed, all of the plurality of driven gears provided. Are arranged on the outer periphery of one driving gear in such a manner that they are always meshed together, and the driving gear is driven by the driving means to drive the plurality of driven gears at the same time, and the plurality of driven gears. Each of the said driving teeth A valve driving device characterized in that a blocking portion that restricts rotation by interfering with rotation is provided, and the one blocking portion that limits the rotation of the driving gear and the other blocking portion are provided in different driven gears. Is disclosed.

  According to claim 1 of Patent Document 3, “the first outlet port opened at a position separated from each other on the valve chamber and one inlet port always communicating with the valve chamber and the flat bottom surface of the valve chamber, A valve housing having two outlet ports and a third outlet port; provided in the valve chamber so as to be capable of rotational displacement; and on the end surface facing the bottom surface of the valve chamber, the valve chamber and the first to third A port opening / closing shape portion that cuts off communication with the outlet port, and the port opening / closing shape portion is displaced relative to the first to third outlet ports by rotational displacement, whereby the valve chamber and the first To a valve body for switching communication between the third outlet port and an electric actuator for rotationally driving the valve body in a stepwise manner, the valve body being driven by a stepwise rotational drive by the electric actuator. The second outlet port And a first switching position in which communication between the third outlet port and the valve chamber is cut off and only the first outlet port is communicated with the valve chamber, and the first outlet port and the third outlet port A second switching position in which communication between the outlet port and the valve chamber is interrupted and only the second outlet port is communicated with the valve chamber; the first outlet port; the second outlet port; and the third A third switching position that cuts off all communication between the outlet port and the valve chamber; and the third outlet that cuts off communication between the first outlet port and the second outlet port and the valve chamber. A fourth switching position in which only the port communicates with the valve chamber, and the communication between the third outlet port and the valve chamber is cut off so that both the first outlet port and the second outlet port are Switching between the fifth switching position and the fifth switching position communicating with the valve chamber; Electric four-way switching valve. "Is disclosed that.

  In claim 1 of Patent Document 4, “a compressor port, a heat exchanger, a throttle, and a refrigeration cycle provided with a flow path switching valve, a suction port for sucking fluid and a discharge port for discharging fluid” And the moving member moves between the first location and the second location inside the housing of the flow path switching valve provided with two switching ports, so that the moving member is in the first location. The suction port and one of the two switching ports communicate with each other inside the housing, and the discharge port and the other switching port of the two switching ports In the second location of the moving member, the suction port and the other switching port of the two switching ports are connected inside the housing. A flow path switching valve in which the discharge port and one of the two switching ports communicate with each other inside the housing, wherein the moving member is connected to the compressor and Moving means for moving between the first location and the second location by using power generated by at least one change among the pressure, differential pressure, and flow rate of the fluid in the flow path switching valve by stopping. The housing is formed in a cylindrical shape, and at least the two switching ports are formed in a valve seat on one end side of the housing in the central axis direction of the housing, and the moving member is The main valve body is housed in a housing and is rotatable around the central axis, and one of the two switching ports is selected as the main valve body. Communication means for communicating with the suction port is formed, and the main valve body is moved between the first location and the second location by rotational displacement about the central axis, and the main valve In the first part of the body, one of the two switching ports is communicated with the suction port by the communicating means, and in the second part of the main valve body, There is disclosed a flow path switching valve characterized in that either one of the two switching ports is communicated with the suction port by the communicating means.

  Claim 1 of Patent Document 5 states that “a non-magnetic projection protruding from a valve body in a four-way switching valve configured such that a bowl-shaped valve body slides on a valve seat having a plurality of fluid ports. A rotor housed inside the shield tube; a motor coil mounted on the outside of the shield tube to drive the rotor; a gear mechanism for converting the rotation of the rotor into a limited angle rotation; and the gear mechanism An electric four-way valve comprising a valve body holding body coupled to the output shaft of the valve body and movably supporting the valve body is disclosed.

  Claim 1 of Patent Document 6 includes: a valve body that is rotated by an actuator such as a motor to switch the flow path; and a valve body that rotatably holds the valve body. A high-pressure passage portion into which a fluid is introduced is formed, and a valve seat portion in which a plurality of outflow ports for selectively communicating the outlets of the high-pressure passage portion are formed in the valve body; Sometimes, the multi-way switching valve is configured to slide in a state in which an outlet side end portion of the high pressure passage portion in the valve body is pressed against the valve seat portion, and the high pressure passage is also in a flow passage switching transient. The positions, dimensions, etc. of the outlet of the high-pressure passage part and the plurality of outlets are set so that the outlet of the part always communicates with at least one of the plurality of outlets. Multi-way switching valve "is disclosed That.

  In claim 1 of Patent Document 7, “a valve body having an inlet port through which fluid flows and a plurality of outlet ports through which fluid flows out, a cylindrical can made of a nonmagnetic metal material attached to the valve body, A plurality of rod-shaped valve elements disposed inside the can and capable of moving forward and backward to open and close the plurality of outlet ports, a rotor rotatably supported inside the can, and a rotational force of the rotor And a cam member that drives the plurality of valve bodies and a coil unit that functions as a stator, and the flow path is configured to selectively communicate the inlet port with the plurality of outlet ports. An electric switching valve for switching, which is provided with a convex portion formed on the cam member to selectively push up the valve body, is disclosed.

JP 2009-79837 A Japanese Patent No. 4694124 Japanese Patent No. 4786822 Japanese Patent No. 3997036 Japanese Patent Publication No. 3-552 JP 2012-31877 A JP 2012-52578 A

  In the configuration described in Patent Document 1, since the refrigerant passing through the partition dew condensation prevention pipe is high-temperature and high-pressure and has a large temperature difference from the periphery of the refrigerator main body opening, the amount of heat of the refrigerant moving to the refrigerator main body opening is small. There is a risk that the temperature in the refrigerator will increase and the amount of energy used will increase.

  Next, in the configuration described in Patent Document 2, since a plurality of valve bodies are required to open and close the plurality of valve openings, the number of parts increases and the configuration becomes complicated.

  Next, Patent Document 3 discloses a position (first switching position, second switching position, fourth switching position) in which only one of the three outlet ports communicates with the inlet port, Although the position where the outlet port is closed simultaneously (third switching position), the position where one outlet port is shut off and the other two outlet ports communicate with the inlet port (fifth switching position) is described. The communication state of each port other than that (other than the position where the outlet port communicates with the inlet port or the position where it is blocked) is not described.

  Next, in the configuration described in Patent Document 4, one of the three discharge ports is connected to the suction port, and the other two discharge ports are connected to each other so that upstream and downstream of the two heat exchangers Can be switched between cooling and heating, but the other communication states are not described.

  Next, in the configuration described in Patent Document 5, since the valve body is driven through a reduction gear and a valve body holder that is supported so as to be freely movable, the number of parts increases and the configuration is complicated. Similarly to Patent Document 4, one of the three discharge ports is connected to the suction port, and the other two discharge ports are connected to each other, thereby reversing the upstream and downstream of the two heat exchangers. However, it is not described about other communication states.

  Next, in the configuration described in Patent Document 6, when the valve body is rotated to switch the flow path, and the inlet pipe side into which the high-pressure fluid is introduced is switched to selectively communicate the plurality of outlets, Although it is configured to communicate with at least one of the outlets in the transition period of the switching operation, the other communication states are not described.

  Next, in the configuration described in Patent Document 7, since the plurality of valve bodies are pushed up by a plurality of cam portions provided in the cam member to selectively open and close the outlet side port, the number of parts increases and is complicated. It becomes composition. Moreover, although the flow path which selectively connects the inlet side port into which the fluid flows into the plurality of outlet side ports can be configured, other communication states are not described.

  In view of the above problems, an object of the present invention is to provide a refrigerant switching valve with improved refrigerant switching performance.

In order to solve the above problems, for example, the configuration described in the claims is adopted. The present application includes a plurality of means for solving the above-described problems. To give an example, a valve body that is swingably supported around a valve body axis, a case that includes the valve body, A valve seat provided at one end, an inflow pipe connecting portion to which one end is opened inside the case, and an inflow pipe is connected; and one end is opened in the case inside the valve seat; A plurality of communication pipe connection portions that are connected to open and close by swinging the valve body, and the plurality of communication pipe connection portions are virtual regular polygons that contact a virtual arc centered on the valve body axis In the refrigerant switching valve arranged at any one of the apexes of the above, the plurality of communication pipe connection portions are connected to a first communication pipe, a second communication pipe, a third communication pipe, and a fourth communication pipe, The body communicates the inflow pipe and the first communication pipe, and the second communication pipe and the third communication pipe. A first state in which the fourth communication pipe is closed, a second state in which the first communication pipe and the second communication pipe are connected, and the third communication pipe and the fourth communication pipe are closed. A first state in which the first communication pipe, the second communication pipe, the third communication pipe, and the fourth communication pipe are closed; the inflow pipe and the fourth communication pipe are connected; A fourth state in which the communication pipe, the second communication pipe, and the third communication pipe are closed; the inflow pipe and the third communication pipe and the fourth communication pipe are connected; the first communication pipe; It is characterized by switching between a fifth state in which the two communicating pipes are closed .

  According to the present invention, it is possible to provide a refrigerant switching valve with improved refrigerant switching performance.

It is the front outline figure which looked at the refrigerator of this embodiment from the front. It is EE sectional drawing in FIG. 1 showing the structure in the store | warehouse | chamber of a refrigerator. It is a front view showing the structure in the store | warehouse | chamber of a refrigerator. FIG. 3 is an enlarged explanatory view of a main part of FIG. 2. It is a figure which shows the 1st mode of the refrigerant | coolant path | route using the refrigerant | coolant switching valve which concerns on 1st Embodiment. It is a figure which shows the 2nd mode of the refrigerant | coolant path | route using the refrigerant | coolant switching valve which concerns on 1st Embodiment. It is a figure which shows the 3rd mode of the refrigerant | coolant path | route using the refrigerant | coolant switching valve which concerns on 1st Embodiment. It is a figure which shows the 4th mode of the refrigerant | coolant path | route using the refrigerant | coolant switching valve which concerns on 1st Embodiment. It is a figure which shows the 5th mode of the refrigerant | coolant path | route using the refrigerant | coolant switching valve which concerns on 1st Embodiment. It is a perspective view which shows the external appearance of the refrigerant | coolant switching valve which concerns on 1st Embodiment. It is FF sectional drawing of FIG. It is a G direction arrow line view of FIG. It is the perspective view which shows the internal structure of a refrigerant | coolant switching valve, and is the perspective view which removed virtually the stator case and the valve case from the refrigerant | coolant switching valve, and was seen through. It is a perspective view which shows the structure of a rotor pinion gear, an idler gear, and a valve body. It is explanatory drawing which shows the geometric relationship which concerns on the center of a regular polygon, a side, and a vertex. It is explanatory drawing which shows arrangement | positioning of the communicating port of the refrigerant | coolant switching valve which concerns on 1st Embodiment, and the shape of a valve body sliding contact surface. It is explanatory drawing which shows the rocking | fluctuation of the valve body of the refrigerant | coolant switching valve which concerns on 1st Embodiment, and the open / closed state of an outlet pipe. It is a figure explaining the internal structure of the refrigerant | coolant switching valve from the 1st state at the time of switching the refrigerant | coolant switching valve which concerns on 1st Embodiment, and a 5th state, and a refrigerant | coolant path | route. It is a figure explaining the internal structure of the refrigerant | coolant switching valve from the 1st state at the time of switching the refrigerant | coolant switching valve which concerns on 2nd Embodiment, and a 5th state, and a refrigerant | coolant path | route. It is explanatory drawing which shows the rocking | fluctuation of the valve body of the refrigerant | coolant switching valve which concerns on 3rd Embodiment, and the opening-and-closing state of an outlet pipe. It is a figure explaining the internal structure of the refrigerant | coolant switching valve from the 1st state at the time of switching the refrigerant | coolant switching valve which concerns on 3rd Embodiment, and a 5th state, and a refrigerant | coolant path | route. It is explanatory drawing which shows the rocking | fluctuation of the valve body of the refrigerant | coolant switching valve which concerns on 4th Embodiment, and the open / closed state of an outlet pipe. It is a figure explaining the internal structure of the refrigerant | coolant switching valve from the 1st state at the time of switching the refrigerant | coolant switching valve which concerns on 4th Embodiment, and a 5th state, and a refrigerant | coolant path | route. It is a figure explaining the internal structure of the refrigerant | coolant switching valve from the 1st state at the time of switching the refrigerant | coolant switching valve which concerns on 5th Embodiment, and a 5th state, and a refrigerant | coolant path | route. It is a figure explaining the internal structure of the refrigerant | coolant switching valve from the 1st state at the time of switching the refrigerant | coolant switching valve which concerns on 6th Embodiment, and a 4th state, and a refrigerant | coolant path | route. It is explanatory drawing which shows arrangement | positioning of the communicating port of the refrigerant | coolant switching valve which concerns on 7th Embodiment, and the shape of a valve body sliding contact surface. It is explanatory drawing which shows the rocking | fluctuation of the valve body which concerns on 7th Embodiment, and the opening-and-closing state of an exit pipe. It is a figure explaining the internal structure of the refrigerant | coolant switching valve from the 1st state at the time of switching the refrigerant | coolant switching valve which concerns on 7th Embodiment, and a 4th state, and a refrigerant | coolant path | route. (1) is HH sectional drawing which shows the structure of the refrigerant | coolant switching valve concerning 8th Embodiment, (2) is JJ sectional drawing. It is FF sectional drawing in FIG. 10 of the refrigerant | coolant switching valve which concerns on 9th Embodiment. It is an expanded partial sectional view which shows the cross section of the 2nd valve seat plate of a refrigerant | coolant switching valve, a valve body, and a communicating pipe. It is an expanded fragmentary sectional view which shows the cross section of the 2nd valve seat plate of a refrigerant | coolant switching valve, the valve body, and a communicating pipe when the pressure by the side of a communicating pipe rises.

  Hereinafter, modes for carrying out the present invention (hereinafter referred to as “embodiments”) will be described in detail with reference to the drawings as appropriate. In each figure, common portions are denoted by the same reference numerals, and redundant description is omitted.

<< First Embodiment >>
≪Configuration of equipment (refrigerator) using refrigerant switching valve≫
First, before describing the refrigerant switching valve 60 (see FIG. 10 and the like) according to the first embodiment, as an apparatus including the refrigerant switching valve 60 (see FIG. 10 and the like) according to the first embodiment, a refrigerator is taken as an example. This will be described with reference to FIGS.

  FIG. 1 is a front external view of the refrigerator according to the present embodiment as viewed from the front. FIG. 2 is a cross-sectional view taken along line EE in FIG. FIG. 3 is a front view illustrating the configuration inside the refrigerator. FIG. 4 is an enlarged explanatory view of the main part of FIG.

As shown in FIG. 3, the refrigerator main body 1 of the present embodiment includes, from above, a refrigerator compartment 2, an ice making room 3 and an upper freezer compartment 4 arranged side by side, a lower freezer compartment 5, and a vegetable compartment 6. Have. As an example, the refrigerator compartment 2 and the vegetable compartment 6 are storage rooms in a refrigerator temperature zone of approximately 3 to 5 ° C.
Further, the ice making room 3, the upper freezer room 4, and the lower freezer room 5 are storage rooms in a freezing temperature zone of approximately −18 ° C.

  As shown in FIG. 1, the refrigerating room 2 includes, on the front side, refrigerating room doors 2a and 2b having a double door (so-called French type) divided into left and right sides. In addition, the ice making chamber 3, the upper freezer compartment 4, the lower freezer compartment 5, and the vegetable compartment 6 are each provided with a drawer type ice making door 3a, an upper freezer compartment door 4a, a lower freezer compartment door 5a, and a vegetable compartment door 6a. . In the following description, the refrigerator compartment doors 2a, 2b, the ice making compartment door 3a, the upper freezer compartment door 4a, the lower freezer compartment door 5a, and the vegetable compartment door 6a are simply referred to as the doors 2a, 2b, 3a, 4a, 5a, 6a. May be called.

  The refrigerator body 1 has door sensors (not shown) that detect the open / closed states of the doors 2a, 2b, 3a, 4a, 5a, and 6a, and the doors 2a, 2b, 3a, 4a, 5a, and 6a are open. An alarm (not shown) that informs the user when the state determined to have been continued for a predetermined time (for example, 1 minute or longer), the temperature setting of the refrigerator compartment 2, the upper freezer compartment 4 and the lower compartment A temperature setting device (control panel 40 including an operation unit and a display unit in FIG. 1) for setting the temperature of the freezer compartment 5 is provided.

  As shown in FIG. 2, the outside of the refrigerator body 1 and the inside of the refrigerator are separated by a heat insulating box 10 formed by filling a foam heat insulating material (foamed polyurethane) between the inner box 10a and the outer box 10b. It has been. Moreover, the heat insulation box 10 of the refrigerator body 1 has a plurality of vacuum heat insulating materials 14 mounted thereon.

  In the warehouse, a plurality of storage chambers arranged in different vertical directions in different temperature zones are adiabatically partitioned by heat insulating partition walls 11a and 11b. That is, by the upper heat insulating partition wall 11a, the refrigerating room 2 which is a refrigerating temperature zone storage room, the upper freezing room 4 and the ice making room 3 which are refrigerating temperature zone storage rooms (see FIG. 1, ice making room 3 in FIG. 2). Is not shown). In addition, the lower heat insulating partition wall 11b separates the lower freezing room 5 which is a storage room in a freezing temperature zone and the vegetable room 6 which is a storage room in a refrigeration temperature zone.

  As shown in FIG. 2, a plurality of door pockets 13 are provided inside the refrigerator compartment doors 2a and 2b. The refrigerator compartment 2 is partitioned into a plurality of storage spaces in the vertical direction by a plurality of shelves 12.

  Moreover, the upper freezer compartment 4, the lower freezer compartment 5, and the vegetable compartment 6 are each provided with storage containers 4b, 5b, 6b behind doors 4a, 5a, 6a provided in front of the respective storage compartments. . The storage containers 4b, 5b, and 6b can be pulled out by placing a hand on a handle portion (not shown) of the doors 4a, 5a, and 6a and pulling it out to the front side. Similarly, in the ice making chamber 3 shown in FIG. 1, a storage container (indicated by (3b) in FIG. 2) is provided behind the door 3a, and the handle 3 (not shown) of the door 3a is put on the hand and pulled out to the front side. Thus, the storage container 3b can be pulled out.

As shown in FIG. 2, doors 2 a, 2 b, 3 a, 4 a, 5 a, and 6 a are provided with door packings 15 around them, and are in close contact with the opening peripheral edge of the refrigerator main body front surface 16 when each door is closed. Thus, the inside of the storage space (the refrigerator compartment 2, the ice making chamber 3, the upper freezer compartment 4, the lower freezer compartment 5, and the vegetable compartment 6) is closed and sealed to prevent leakage of cold air from the storage space to the outside.
<Condensation prevention>
Here, if each door 2a, 2b, 3a, 4a, 5a, 6a of the refrigerator main body 1 is opened, outside air will contact the opening peripheral part of the refrigerator main body front surface 16. FIG. In particular, since the inside of the ice making chamber 3, the upper freezing chamber 4, and the lower freezing chamber 5 is a freezing temperature zone below freezing (for example, −18 ° C.), when the doors 3a, 4a, and 5a are opened, the opening of the front surface 16 of the refrigerator body is opened. When the outside air touches the peripheral edge and is cooled, the dew point is reached and the dew point is easily formed on the front surface 16 of the refrigerator body. Furthermore, if the doors 3a, 4a, and 5a are closed in a state of condensation on the refrigerator main body front surface 16, water droplets between the door packing 15 and the refrigerator main body front surface 16 may be cooled below freezing point and may freeze.

  Therefore, as shown in FIG. 2 and FIG. 3, a refrigerant pipe 17 through which the refrigerant after passing through the condenser 52 described later is allowed to pass through the peripheral edges of the ice making chamber 3, the upper freezing chamber 4, and the lower freezing chamber 5. Buried. Here, the temperature of the refrigerant flowing through the refrigerant pipe 17 (the temperature of the refrigerant after passing through the condenser 52 described later) is higher than the outside temperature, for example, 33 ° C. when the outside temperature is 30 ° C. It is trying to be about. For this reason, the refrigerant | coolant piping 17 has a function which heats the opening peripheral part of the refrigerator main body front surface 16, and prevents dew condensation and freezing, and is called the "dew condensation prevention piping 17" in the following description.

  In the present embodiment, the dew condensation prevention pipe 17 is provided at the opening periphery of the ice making chamber 3, the upper freezing chamber 4, and the lower freezing chamber 5, but is provided at the opening peripheral portion of the refrigerator compartment 2 and the vegetable compartment 6. The structure may be sufficient and the effect of preventing dew condensation is acquired similarly.

<Cooling air circulation>
As shown in FIG. 2 (refer to FIG. 3 as appropriate), the cooler 7 is provided in a cooler storage chamber 8 provided substantially at the back of the lower freezing chamber 5. The cooler 7 is configured by attaching a large number of fins to the cooler pipe 7d so that heat can be exchanged between the refrigerant and the air in the cooler pipe 7d.

  Further, an internal fan 9 (for example, a fan driven by a motor) is provided above the cooler 7. The air cooled by the heat exchange by the cooler 7 (hereinafter, the low-temperature air heat-exchanged by the cooler 7 is referred to as “cold air”) is sent to the refrigerator air blow duct 22 and the vegetable room air blow duct 25 by the internal fan 9. To the storage rooms of the refrigerator compartment 2, the vegetable compartment 6, the ice making compartment 3, the upper freezer compartment 4 and the lower freezer compartment 5 through the ice making compartment air duct 26a, the upper freezer compartment air duct 26b and the lower freezer compartment air duct 27. It is supposed to be sent. Incidentally, each air duct to the refrigerator compartment 2, the ice making room 3, the upper freezer room 4, the lower freezer room 5, and the vegetable room 6 is provided on the back side of each storage room of the refrigerator main body 1 as shown by a broken line in FIG. It has been.

  The storage room to which the cool air from the cooler 7 is sent is controlled by the refrigerating temperature zone cool air control means 20 and the freezing temperature zone room cool air control means 21.

  Here, the refrigeration temperature zone cold air control means 20 is a so-called twin damper having two independent openings, and the first opening 20a controls the air flow to the cold room air duct 22, and the second opening 20b. Controls the air flow to the vegetable room air duct 25. The freezing temperature zone cold air control means 21 is a single damper having a single opening, and controls the air blowing to the ice making room air duct 26a, the upper freezer room air duct 26b, and the lower freezer room air duct 27. It has become.

  Specifically, when the first opening 20a of the refrigeration temperature zone cold air control means 20 is in an open state, the cold air is provided in multiple stages via the cold room upstream duct 23 (described later) and the cold room air duct 22. It is sent to the refrigerator compartment 2 from the blower outlet 2c. The cold air that has cooled the refrigerator compartment 2 flows from the return port 2d provided in the lower portion of the refrigerator compartment 2 through the refrigerator compartment return duct 24 into the cooler compartment 8 from the lower side portion of the cooler compartment 8. The heat exchange with the cooler 7 is performed.

  In addition, when the second opening 20b of the refrigeration temperature zone cold air control means 20 is in the open state, the cold air passes from the outlet 6c to the vegetable compartment 6 via the cold compartment upstream duct 23 (described later) and the vegetable compartment air duct 25. Sent. The cold air that has cooled the vegetable compartment 6 flows into the cooler housing chamber 8 from the lower part of the cooler housing chamber 8 via the return port 6 d and exchanges heat with the cooler 7. Incidentally, the amount of air circulating through the vegetable compartment 6 is smaller than the amount of air circulating through the refrigerator compartment 2 and the amount of air circulating through the freezing temperature zone chamber described later.

  When the freezing temperature zone cold air control means 21 is in the open state, the cold air is sent to the ice making chamber 3 and the upper freezer compartment 4 from the outlets 3c and 4c through the ice making chamber air duct 26a and the upper freezer compartment air duct 26b, respectively. . Further, it passes through the lower freezer compartment air duct 27 and is sent from the outlet 5 c to the lower freezer compartment 5. As described above, the refrigeration temperature chamber cold air control means 21 is attached above the blower cover 31 to be described later and facilitates air blowing to the ice making chamber 3.

  The cold air blown into the ice making chamber 3 through the ice making chamber blow duct 26 a and the cold air blown into the upper freezer compartment 4 through the upper freezer compartment blow duct 26 b descend to the lower freezer compartment 5. Then, the cool air blown into the lower freezer compartment 5 through the lower freezer compartment air duct 27 flows into the cooler storage compartment 8 through the freezer return port 28 provided in the lower part of the lower freezer compartment 5. The heat exchange with the cooler 7 is performed.

  The cold air that has cooled the ice making chamber 3, the upper freezing chamber 4, and the lower freezing chamber 5 returns to the cooler storage chamber 8 through the freezing chamber return port 28 provided in the lower part of the lower freezing chamber 5. Incidentally, the width dimension of the freezer compartment return port 28 is substantially equal to the width dimension of the cooler 7.

  As shown in FIG. 4, the freezing temperature zone back partition 29 in which the outlets 3 c, 4 c, and 5 c are formed includes an upper freezing chamber 4, an ice making chamber 3, a lower freezing chamber 5, and a cooler storage chamber 8. Divide the space.

  The blower support part 30 to which the internal blower 9 is attached partitions the cooler storage chamber 8 and the freezing temperature zone back partition 29.

  The blower cover 31 is disposed so as to cover the front surface of the internal fan 9. Between the blower cover 31 and the freezing temperature zone back partition 29, the ice making chamber blow duct 26a and the upper freezer compartment blow duct for guiding the cool air blown by the internal blower 9 to the outlets 3c, 4c and 5c. 26b and a lower stage freezer compartment air duct 27 are formed. Further, an air outlet 31a is formed in the upper part of the blower cover 31, and a refrigerating temperature zone cold air control means 21 is provided at the air outlet 31a.

  Further, the blower cover 31 also plays a role of blowing cold air blown by the internal fan 9 toward the refrigeration temperature zone cold air control means 20 side. That is, the cold air that does not flow to the refrigeration temperature zone cold air control means 21 side provided in the blower cover 31 passes to the refrigeration temperature zone room cold air control means 20 side via the cold room upstream duct 23 as shown in FIG. Led.

  The blower cover 31 includes a rectifying unit 31 b on the front surface of the internal fan 9. The rectifying unit 31b rectifies the turbulent flow caused by the cold air blown out to prevent noise generation.

  When the refrigeration temperature zone cool air control means 20 and the freezing temperature zone cool air control means 21 are in the open state, most of the cool air is sent to the freezing temperature zone cool air control means 21 side, and the remaining other cool air is Each air duct and the like are configured to be led to the refrigeration temperature zone cold air control means 20 side. Accordingly, one cooler is provided for the freezing temperature zone (ice making chamber 3, upper freezing chamber 4 and lower freezing chamber 5) and the refrigerating temperature zone (refrigeration room 2 and vegetable room 6) which are storage rooms having different temperature zones. 7 can supply cold air.

  As described above, switching of the cool air to be blown to each storage chamber of the refrigerator main body 1 can be performed by appropriately opening and closing the refrigeration temperature zone cool air control means 20 and the freezing temperature zone room cool air control means 21. It can be done.

  Further, as shown in FIG. 4, a defrost heater 35 as defrosting means is installed below the cooler 7, and defrost water is placed on the defrost heater 35 above the defrost heater 35. In order to prevent dripping, an upper cover 36 is provided.

  The defrost water generated by the defrosting (melting) of the frost attached to the walls of the cooler 7 and the surrounding cooler storage chamber 8 flows into the trough 32 provided at the lower part of the cooler storage chamber 8. It reaches the evaporating dish 34 disposed in the machine room 50 through the drain pipe 33, is evaporated by the heat of the compressor 51 and the condenser 52, which will be described later, and is discharged outside the refrigerator.

<Machine room>
As shown in FIG. 3, a machine room 50 is provided on the lower back side of the heat insulating box 10. In the machine room 50, a compressor 51 that compresses and discharges the refrigerant, a condenser 52 that exchanges heat between the refrigerant and air, an external fan 53 that promotes heat exchange between the refrigerant and air in the condenser 52, A decompression means 54 that is a thin tube and a refrigerant switching valve 60 are arranged.

  The compressor 51, the condenser 52, the decompression means 54, and the refrigerant switching valve 60 are connected to the cooler 7 and the dew condensation prevention pipe 17 by a pipe to form a refrigerant path (refrigerant circuit) through which the refrigerant flows. It is like that. The refrigerant path (refrigerant circuit) will be described later with reference to FIGS.

<Sensor and control system>
As shown in FIG. 2, a control board 41, which is a control means on which a CPU, a memory such as a ROM or a RAM, an interface circuit, and the like are mounted as a control means, is disposed on the top surface of the refrigerator body 1. The refrigerator includes an outside air temperature sensor 42 that detects a temperature environment outside the warehouse (outside air temperature), an outside air humidity sensor 43 that detects a humidity environment outside the warehouse (outside air humidity), and a refrigerator temperature sensor that detects the temperature of the refrigerator compartment 2. 44, a vegetable room temperature sensor 45 for detecting the temperature of the vegetable room 6, a freezer temperature sensor 46 for detecting the temperature of the freezing temperature zone (the ice making room 3, the upper freezing room 4 and the lower freezing room 5), and the cooler 7 A temperature sensor such as a cooler temperature sensor 47 for detecting the temperature is provided, and the detected temperature is input to the control board 41. The control board 41 includes a door sensor (not shown) for detecting the open / closed state of the doors 2a, 2b, 3a, 4a, 5a, 6a, and a control panel 40 (see FIG. 1) provided on the refrigerator compartment door 2a. It is connected.

  Then, the control board 41 individually controls the ON / OFF of the compressor 51 and the control of the rotational speed, the refrigeration temperature zone cool air control means 20 and the freezing temperature zone cool air control means 21 according to the program previously installed in the ROM. The control of each drive motor (not shown) that drives the fan, the ON / OFF of the internal fan 9 and the rotational speed, the ON / OFF of the external fan 53, the rotational speed, etc., and the door open state are notified. By controlling ON / OFF of an alarm (not shown), switching operation of the refrigerant switching valve 60, and the like, the operation of the entire refrigerator can be controlled.

<Refrigerant path (refrigerant circuit)>
Next, the refrigerant path (refrigerant circuit) of a refrigerator provided with the refrigerant switching valve 60 (refer FIG. 10 etc.) which concerns on 1st Embodiment is demonstrated using FIGS.

  FIG. 5 is a diagram illustrating a first mode of the refrigerant path using the refrigerant switching valve 60 according to the first embodiment. FIG. 6 is a diagram illustrating a second mode of the refrigerant path using the refrigerant switching valve 60 according to the first embodiment. FIG. 7 is a diagram illustrating a third mode of the refrigerant path using the refrigerant switching valve 60 according to the first embodiment. FIG. 8 is a diagram illustrating a fourth mode of the refrigerant path using the refrigerant switching valve 60 according to the first embodiment. FIG. 9 is a diagram illustrating a fifth mode of the refrigerant path using the refrigerant switching valve 60 according to the first embodiment.

  The refrigerant switching valve 60 includes five communication pipes (an inflow pipe 68 and communication pipes 69b, 69c, 69d, and 69e, which will be described later with reference to FIG. 10 and the like), and includes one inflow port A and four communication ports B and C. , D and E are so-called five-way valves. That is, a plurality of communication pipe connection portions that are communication ports B, C, D, and E are provided, and in this embodiment, there are four ports.

As shown in FIG. 5, the first refrigerant pipe 55 is connected to the upstream side of the inlet A, the condenser 52, and the high-pressure side discharge port of the compressor 51 is connected to the upstream side thereof. One end of the second refrigerant pipe 56 is connected to the communication port B, and the other end of the second refrigerant pipe 56 is connected to the communication port D via the condensation prevention pipe 17. A third refrigerant pipe 57a is connected to the downstream side of the communication port E, and is connected to the cooler 7 that is an evaporator via the first decompression means 54a that is a thin tube and the junction part 89. A fourth refrigerant pipe 57b is connected to the downstream side of the communication port C, and is connected to the third refrigerant pipe 57a at the junction 89 via the second decompression means 54b which is a thin tube. The downstream side of the cooler 7 is connected to the low pressure side suction port of the compressor 51. Incidentally, as a refrigerant in the refrigerant path (refrigerant circuit), for example, isobutane can be used.

  As shown in FIGS. 5 to 9, the first mode to the fifth mode are different in the open / close state (communication state) of the refrigerant switching valve 60 and in the refrigerant path (circuit).

(First mode)
As shown in FIG. 5, in the first mode, in the refrigerant switching valve 60, the inlet A and the communication port B communicate with each other (refrigerant flow L1), and the communication port D and the communication port E communicate with each other (refrigerant flow L2). The communication port C is closed.

  The high-temperature and high-pressure refrigerant compressed by the compressor 51 flows into the condenser 52 and is cooled by exchanging heat with air (external air) in the condenser 52. The refrigerant that has flowed out of the condenser 52 flows into the inlet A of the refrigerant switching valve 60 through the first refrigerant pipe 55, flows out of the communication port B, as shown by the refrigerant flow L1, and flows into the second refrigerant pipe 56. It flows into the dew condensation prevention piping 17 through a part.

  Here, since the temperature of the refrigerant flowing into the dew condensation prevention pipe 17 (that is, the temperature of the refrigerant flowing out of the condenser 52) is higher than the outside air, the refrigerant flowing into the dew condensation prevention pipe 17 is the refrigerator main body. The opening periphery of 1 is heated.

  Then, the refrigerant that radiates heat to the peripheral edge of the opening and has a temperature lower than that at the time of flowing into the dew condensation prevention pipe 17 flows out of the dew condensation prevention pipe 17, passes through the remaining part of the second refrigerant pipe 56, and communicates with the refrigerant switching valve 60. As shown in the refrigerant flow L2, the refrigerant flows into the port D, flows out from the communication port E, passes through the third refrigerant pipe 57a, passes through the first decompression means 54a, which is a narrow tube, and then adiabatically expands to reduce the temperature and pressure. Become. The refrigerant after passing through the first decompression means 54a flows into the cooler 7 (cooler pipe 7d) that is an evaporator through the junction portion 89. The low-temperature refrigerant that has flowed into the cooler 7 (cooler pipe 7 d) exchanges heat with ambient air in the cooler 7 and returns to the compressor 51.

  In this way, in the first mode, the refrigerant temperature passing through the dew condensation prevention pipe 17 is higher than the outside air temperature where the refrigerator body 1 is installed, so even if the outside air is hot and humid, Condensation at the peripheral edge of the opening can be prevented.

(Second mode)
As shown in FIG. 6, in the second mode, in the refrigerant switching valve 60, the inlet A and the communication port B communicate with each other (refrigerant flow L1), and the communication port C and the communication port D communicate with each other (refrigerant flow L3). The communication port E is closed.

  Since the communication port E is closed, the refrigerant flowing out of the dew condensation prevention pipe 17 and flowing into the communication port D of the refrigerant switching valve 60 through the remaining portion of the second refrigerant pipe 56 is shown in the refrigerant flow L3. Then, after flowing out from the communication port C, passing through the fourth refrigerant pipe 57b and passing through the second decompression means 54b, which is a thin tube, adiabatically expands to become a low temperature and low pressure, and after passing through the junction 89, a cooler which is an evaporator 7 (cooler piping 7d). The low-temperature refrigerant that has flowed into the cooler 7 (cooler pipe 7 d) exchanges heat with ambient air in the cooler 7 and returns to the compressor 51.

  Thus, even in the second mode, the refrigerant temperature passing through the dew condensation prevention pipe 17 is higher than the outside air temperature where the refrigerator body 1 is installed. Therefore, even if the outside air is hot and humid, the refrigerator body 1 Condensation at the peripheral edge of the opening can be prevented.

(Third mode)
As shown in FIG. 7, in the third mode, the refrigerant switching valve 60 is sealed so that the communication port B, the communication port C, the communication port D, and the communication port E do not communicate with each other. Further, in the third mode, the compressor 51 is stopped.

  In the third mode, the circuit in which the refrigerant circulates is cut off. That is, since the communication port C, the communication port D, and the communication port E of the refrigerant switching valve 60 are blocked, the comparison in the first refrigerant pipe 55, the condenser 52, the second refrigerant pipe 56, and the refrigerant condensation prevention pipe 17 is performed. It is possible to prevent an increase in the temperature of the cooler 7 by blocking the flow of a high temperature refrigerant into the third refrigerant pipe 57a, the fourth refrigerant pipe 57b, and the cooler 7.

Here, in the case of the operation in which the refrigerator cools the storage chamber by the refrigeration cycle, the refrigerator operates the compressor 51 until the storage chamber becomes a predetermined temperature or lower, and stops the compressor 51 when the storage chamber falls below the predetermined temperature. It is like that. When the storage chamber rises above a predetermined temperature, the compressor 51 is restarted to cool the storage chamber.

  By setting the refrigerant switching valve 60 to the third mode when the compressor 51 is stopped, the refrigerant in the cooler 7 can be maintained at a low temperature. When the compressor 51 is restarted, since the refrigerant in the cooler 7 is at a low temperature, the heat exchange efficiency is high, and the energy saving performance of the refrigerator can be increased.

(4th mode)
As shown in FIG. 8, in the fourth mode, the refrigerant switching valve 60 communicates with the inlet A and the communication port E (refrigerant flow L4), the communication port B, the communication port D, and the communication port C with each other. It is designed not to communicate.

  The high-temperature and high-pressure refrigerant compressed by the compressor 51 flows into the condenser 52 and is cooled by exchanging heat with air (external air) in the condenser 52. The refrigerant flowing out of the condenser 52 flows into the inlet A of the refrigerant switching valve 60 through the first refrigerant pipe 55, flows out of the communication port E as shown in the refrigerant flow L4, and flows into the fourth refrigerant pipe 57a. Then, after passing through the first decompression means 54a which is a thin tube, it adiabatically expands to become a low temperature and low pressure, and flows into the cooler 7 (cooler pipe 7d) which is an evaporator via the junction part 89. The low-temperature refrigerant that has flowed into the cooler 7 (cooler pipe 7 d) exchanges heat with ambient air in the cooler 7 and returns to the compressor 51.

(5th mode)
As shown in FIG. 9, in the fifth mode, the inlet A and the communication port C communicate with each other (refrigerant flow L5), and the communication port B, the communication port D, and the communication port E do not communicate with each other. .

  After the refrigerant flowing in from the inlet A of the refrigerant switching valve 60 flows out from the communication port C through the fourth refrigerant pipe 57b and passes through the second decompression means 54b, which is a thin tube, as shown in the refrigerant flow L5. , Adiabatic expansion and low temperature and low pressure.

  The refrigerant after passing through the second decompression means 54b flows into the cooler 7 (cooler pipe 7d) which is an evaporator through the junction part 89. The low-temperature refrigerant that has flowed into the cooler 7 (cooler pipe 7 d) exchanges heat with ambient air in the cooler 7 and returns to the compressor 51.

When operating in the first mode (see FIG. 5) or the second mode (see FIG. 6), a refrigerant having a temperature higher than that of the outside air flows through the dew condensation prevention pipe 17, so that the heat may heat the storage chamber.
Therefore, when the risk of condensation is low such as when the outside air is low in humidity, the refrigerant can be prevented from flowing through the condensation prevention pipe 17 by operating in the fourth mode or the fifth mode. Thereby, although there is no effect of preventing condensation at the peripheral edge of the opening of the refrigerator body 1, when there is a low risk of condensation, heat leakage from the condensation prevention pipe 17 to the inside of the refrigerator body 1 can be prevented, and the energy saving performance of the refrigerator Can be high.

  The first mode, the second mode, the fourth mode, and the fifth mode of the refrigerant switching valve 60 determine whether or not there is a possibility of dew condensation based on the detection results of the outside air temperature sensor 42 and the outside air humidity sensor 43. If the mode is switched to the first mode or the second mode when there is a risk of condensation, and the mode is switched to the fourth mode or the fifth mode when there is no risk of condensation, the condensation is prevented only when necessary. In this case, heat leakage can be prevented, which is effective in reducing power consumption.

  Here, as an example, the second decompression means 54b, which is a thin tube, has a pipe diameter and length that can obtain a pressure drop suitable for operation in the fifth mode (see FIG. 9), and the first decompression means 54a. If the tube diameter and length are such that a pressure drop suitable for operation in the first mode (see FIG. 5) can be obtained, even when operating in the first mode when there is a risk of condensation, Alternatively, even when operating in the fifth mode when there is no risk of condensation, an appropriate pressure drop is obtained by the decompression means 54a, 54b, so that a refrigerant circuit configuration suitable for operating conditions can be obtained. The energy saving performance of the refrigerator can be increased.

≪Refrigerant switching valve 60≫
Next, the configuration and operation of the refrigerant switching valve 60 according to the first embodiment will be described with reference to FIGS. 10 to 14.

  FIG. 10 is a perspective view showing an appearance of the refrigerant switching valve 60 according to the first embodiment. 11 is a cross-sectional view taken along line FF in FIG. 12 is a view in the direction of arrow G in FIG. FIG. 13 is a perspective view showing an internal configuration of the refrigerant switching valve 60, and is a perspective view of the refrigerant switching valve 60 seen through virtually removing the stator case 61 and the valve case 66. FIG. 14 is a perspective view showing the configuration of the rotor pinion gear 75, the idler gear 79, and the valve body 80. The configuration of the driving force transmission means using the gears from the rotor 70 to the valve body 80 will be described.

  As shown in FIGS. 10 to 11, a substantially cylindrical stator 62, which is a stator of a motor provided with a coil, is formed inside a substantially cylindrical stator case 61. Further, a part of the stator case 61 forms a connector case 63 that is convex outward, and the connector case 63 has a connector 65 having connector pins 64 that connect the wiring from the stator 62 to the outside. Is provided.

  The valve case 66 is integrally formed of a nonmagnetic metal such as stainless steel, and has a bottomed cylindrical shape with the upper end closed and the lower end opened. The upper side of the valve case 66 is fitted to the inner periphery of the stator 62, and the lower side of the valve case 66 is an open end whose diameter is larger than that of the upper side. A circular valve seat plate 67 is fitted to this open end, and the entire periphery is hermetically sealed by welding or brazing.

  As shown in FIGS. 11 and 12, the valve seat plate 67 has a disc-shaped first valve seat plate 67a that forms the outer periphery of the valve seat plate 67, and a diameter larger than that of the first valve seat plate 67a. The disk-shaped second valve seat plate 67b, which is small and thick and includes the center position of the first valve seat plate 67a, is joined to each other so as to seal the joint portion by brazing.

  As shown in FIG. 11, one inflow pipe 68 is coupled to the first valve seat plate 67a so as to seal the joint portion by brazing and communicates with the inside of the valve case 66. Further, the communication valve 69b, the communication pipe 69c, the communication pipe 69d, and the communication pipe 69e, which are the four communication pipes 69, are coupled to the second valve seat plate 67b so as to seal the joint portion by brazing. The case 66 communicates with the inside. As shown in FIG. 11, one end of the inflow pipe 68, the communication pipe 69 b, the communication pipe 69 c, the communication pipe 69 d, and the communication pipe 69 e is an inflow opening that opens toward the inside of the valve case 66 on one surface of the valve seat plate 67. A, communication port B, communication port C, communication port D, and communication port E are connected.

  As shown in FIG. 11, the rotor 70 is a rotor of a motor having a magnet. When the connector pin 64 is connected to a drive circuit (not shown) and energized, a magnetic field is generated in the stator 62, and a magnetic force is transmitted to the rotor 70 via the valve case 66 to constitute a motor that rotates the rotor 70. An example of the configuration of such a motor is a general stepping motor, and detailed description thereof is omitted, but the motor rotates at a certain angle.

  The valve body shaft 71 is a rotation center axis of the rotor 70 and a swing center axis of the valve body 80 described later.

  The first valve seat plate 67a and the second valve seat plate 67b are arranged coaxially, and the valve body shaft 71 is located at the center of the first valve seat plate 67a and the second valve seat plate 67b. The rotor shaft hole 72 which is a fitting hole is formed so as not to penetrate the second valve seat plate 67b. In addition, a rotor bearing 73 that is a recess is formed in the approximate center of the cylindrical bottom portion above the valve case 66. One end of the valve body shaft 71 is supported by being fitted in the rotor shaft hole 72, and the other end is fitted and supported by the rotor bearing 73.

  Here, as shown in FIG. 12, the communication port B, the communication port C, the communication port D, and the communication port E are arranged on the same virtual circumference centered on the valve body shaft 71 (rotor shaft hole 72). ing. In other words, the communication port B, the communication port C, the communication port D, and the communication port E, which are a plurality of communication pipe connection parts, are any of the vertices of a virtual regular polygon that touches a virtual arc centered on the valve body axis 71. It is arranged at such a position. Suitable arrangement angles of the communication port B, the communication port C, the communication port D, and the communication port E will be described later.

  Here, the circumference is not limited to the locus of a point moving at an equal distance from one point on the plane. For example, even in the locus of a point where the distance from one point on the plane changes, this configuration can be included in this embodiment as long as it does not hinder the opening and closing of the communication port due to the configuration of the valve. .

  In addition, it is most preferable that the position of the communication pipe connection portion which is a communication port has the center position of the apex coincident with the center position of the communication port, but the present invention is not limited to this, and the communication port has a virtual regular polygonal shape. A configuration in which the center position of the vertex does not coincide with the center position of the communication port may be used as long as it is within the range including the vertex.

  The communication port C is in a position close to the inlet A with respect to the valve body shaft 71 (rotor shaft hole 72) (on the opposite side to the idler shaft 78 described later with respect to the valve body shaft 71 (rotor shaft hole 72)). Is provided. The communication port B and the communication port E are provided at positions facing each other across the communication port C.

  As shown in FIGS. 11 and 12, in the first valve seat plate 67a, an idler gear 79, which will be described later, is provided on the opposite side of the inlet pipe 68 (inlet A) with respect to the valve body shaft 71 (rotor shaft hole 72). A fitting hole for the idler shaft 78, which is the center of rotation, is formed, and one end of the idler shaft 78 is joined to the first valve seat plate 67a by brazing so as to seal the joint. As shown in FIG. 11, the other end of the idler shaft 78 is not fixed and has a so-called cantilever structure.

  The rotor 70 is supported by a rotor drive unit 74, and the rotor 70 and the rotor drive unit 74 are rotated together with the valve body shaft 71 as a rotation center axis. A rotor pinion gear 75 is formed on a part of the lower side of the rotor driving unit 74. That is, when the rotor 70 is rotated, the rotor driving unit 74 and the rotor pinion gear 75 are rotated together.

  Next, a preferred arrangement relationship among the inflow pipe 68, the second valve seat plate 67b or the valve body 80, and the idler shaft 78 or the idler gear 79 will be described with reference to FIGS. As shown in FIGS. 11 to 13, the inflow pipe 68 communicates with the inside of the valve case 66, and the refrigerant is jetted out from the inlet A into the valve case 66 at a high speed. When the refrigerant flows into the valve case 66, the refrigerant is enlarged and the flow velocity is reduced, and the refrigerant flows out of any of the outlets B, C, and D opened according to the switching state of the valve to the outlet pipe 69. Here, when the fluid force generated by the refrigerant jetted from the inlet A acts on the idler gear 79, the idler gear 79 floats or vibrates and acts on the valve body 80, and the second valve seat of the valve body 80 is actuated. There is a possibility that the sealing force may be lowered due to a change in the pressing force on the plate 67b.

  In this embodiment, an inlet A is provided on one side of the valve body 80 arranged coaxially with the central axis of the valve case 66, and an idler shaft 78 or an idler gear 79 is provided on the other side of the valve body 80. By arranging in this way, the idler gear 79 is not arranged in the vicinity of the inlet A, so that the idler gear 79 does not receive fluid force from the refrigerant flowing into the valve case 66, and the idler gear 79 floats or vibrates. Since the pressing force of the valve body 80 against the second valve seat plate 67b does not change, a stable sealing property can be obtained, and a highly reliable refrigerant switching valve can be obtained. The expression that the valve body 80 is arranged coaxially with the central axis of the valve case 66 is a configuration in which the central axis of the valve case 66 and the position of the shaft are deviated within a range that does not hinder the rotational drive of the valve body 80. Including.

  The valve body 80 swings about the valve body shaft 71 while contacting one side with the valve seat plate 67 with the valve body sliding contact surface 81 (see FIG. 14). When the valve body 80 swings, the communication ports B, C, D, and E provided in the valve seat plate 67 are opened and closed. Further, a valve body sliding contact surface 81 (see FIG. 14) which is a surface in contact with the valve seat plate 67 of the valve body 80 is provided with a communication recess 82 (see FIG. 14) which is a partial recess. The relationship between the position of the communication recess 82 and the opening / closing operation of the communication ports B, C, D, and E will be described later. A valve body gear 83 is provided on the side of the valve body 80 away from the valve seat plate 67.

  As shown in FIG. 14, the rotor pinion gear 75 formed integrally with the rotor drive unit 74 has a rotor drive unit tip 76 that is a convex portion provided around the rotation shaft at the lower end of the rotor pinion gear 75. It is mounted on the upper surface (see FIG. 11) and is rotatably arranged around a valve body shaft 71 which is a common central axis via a rotor drive shaft hole 77 and a valve body shaft hole 85, respectively.

  As shown in FIGS. 11 and 13, a rotor driving unit 74 that rotates with the leaf spring 86, which is a biasing means having a part of the arm extending radially toward the inside of the upper surface of the valve case 66, supports the rotor 70 and rotates integrally therewith. The reaction force in the direction of the valve element shaft 71 received by the arm of the leaf spring 86 from the inner side of the upper surface of the valve case 66 is applied to the valve element 80 via the rotor drive unit 74 and the rotor pinion gear 75 to Press against the valve seat plate 67. Further, the dead weight of the rotor 70 is further added to the valve body 80.

  Here, since the position where the rotor drive unit tip 76 contacts the valve body 80 is in the vicinity of the valve body shaft 71, the valve body 80 is pressed against the valve seat plate 67 in the axial direction in the vicinity of the rotation shaft. It is designed to be pressed evenly and with a good balance.

  An idler gear 79 having an idler large gear 79b and an idler pinion 79a is rotatably supported on the idler shaft 78. The idler large gear 79b meshes with the rotor pinion gear 75, and the idler pinion 79a meshes with the valve body gear 83 to decelerate. The rotational torque from the rotor 70 is transmitted while being decelerated in the order of the rotor pinion gear 75, the idler large gear 79b, the idler pinion 79a, and the valve body gear 83.

  Here, if the number of teeth of the rotor pinion gear 75 is Z1, the number of teeth of the idler large gear 79b is Z2, the number of teeth of the idler pinion 79a is Z3, and the number of teeth of the valve disc gear 83 is Z4, all the gear modules are If they are the same, if the relationship of Z1 + Z2 = Z3 + Z4 is satisfied, the inter-axis distance between the rotor pinion gear 75 and the idler large gear 79b and the inter-axis distance between the idler pinion 79a and the valve body gear 83 are equal. The rotor pinion gear 75 and the valve body gear 83 can be arranged coaxially. For example, if Z1 = 12, Z2 = 34, Z3 = 13, Z4 = 33, then Z1 + Z2 = Z3 + Z4 = 46, and this relationship can be satisfied.

  Incidentally, the reduction ratio from the rotor 70 to the valve body 80 at this time is (Z1 × Z3) / (Z2 × Z4). In the above example, (12 × 13) / (34 × 33) = about 1 /7.2. That is, since the valve body 80 rotates with a torque 7.2 times the torque generated by the rotor 70, the rotational torque has a margin, and the switching operation of the valve body 80 can be ensured.

  Further, as shown in FIG. 14, a part of the valve body 80 is formed with a stopper 84 that is more convex than the outer periphery of the valve body gear 83, and the valve body 80 has rotated the maximum angle clockwise or counterclockwise. In this case, the rotation angle of the valve body gear 83 is limited to a predetermined angle range by contacting a cylindrical idler stopper 79c protruding downward from the idler pinion 79a of the idler gear 79. The rotation angle of the valve body gear 83 is in contact with a predetermined angle, for example, an angle of about 8 °, in addition to the rotation angle range necessary for the switching operation of the valve body 80 described later. Configured to stop rotation.

  The idler gear 79 is formed with a protruding portion 79s on the upper surface of the idler large gear 79b in a circumferential shape. Further, the rotor driving unit 74 is formed with a protrusion 74s in a circumferential shape. The idler shaft 78 of the idler gear 79 has a cantilever structure, but when the position of the idler gear 79 in the axial direction is shifted upward, the protruding portion 79s abuts on the protruding portion 74s and cannot move any further. It has become. As a result, the idler gear 79 is prevented from falling off the cantilevered idler shaft 78.

<Operation of Refrigerant Switching Valve 60>
Next, the opening / closing operation of the communication ports B, C, D, and E by the valve body 80 will be described with reference to FIGS. 15 to 18. 16 to 18, the valve body sliding contact surface 81 in contact with the valve seat plate 67 is shown with hatching for explanation.

  As the arrangement of the communication ports, it is preferable to arrange the communication ports at the vertices of a virtual regular polygon (a regular N-gon having N as an integer), so the relationship between the sides and vertices in the regular polygon is shown in FIG. explain.

FIG. 15 is an explanatory diagram showing a part of a regular N-angle 90 in which the length of one side inscribed in a circle with a radius R is p. A triangle connecting one side of a regular N-angle 90 and the center O of a circle with a radius R is an isosceles triangle having a length of two sides R and a length of p of one side, and has a length R. The angle between the two sides is (2π / N) radians. Here, if the midpoint of one side of the length p is u, in the triangle Ouv, uv = (p / 2), Ov = R, angle uOv = (π / N) radians,
uv = (p / 2) = R · sin (π / N)... (Formula 1)
When there is a relationship,
R = p / [2 · sin (π / N)] (Equation 2)
It becomes.

FIG. 16 is a diagram for explaining the positional relationship between the valve body sliding contact surface 81 of the valve body 80 and the communication ports B, C, D, and E in the first embodiment, as viewed from the direction of arrow G in FIG. If the outer diameter of the communication pipe 69 is d and the gap between the adjacent communication pipes 69 is gap, the pitch p, which is the interval at which the communication ports B, C, D, and E are arranged, is p = d + gap.
Therefore, Equation 2 is
R = (d + gap) / [2 · sin (π / N)] (Equation 3)
The radius R at which the communication port 69 can be arranged is determined from the diameter d of the communication pipe, the gap gap necessary between the adjacent communication pipes 69, and the regular N-square N in which the communication pipes are arranged. As a specific example, if the minimum dimension for processing the gap is set, the radius R obtained at that time is the minimum arrangement radius.

  As an example, when d = 2.8, gap = 0.5, and N = 7, R = (2.8 + 0.5) / [2 · sin (π / 7)] = 3.8.

  Here, in the first embodiment, the communication ports B, C, D, and E are arranged at the apexes of the regular heptagon 91 whose length of one side is p. In addition, the expression of the regular polygon in a present Example is not limited to the structure strictly defined geometrically. For example, a polygon similar to a regular polygon is allowed as long as it satisfies the function as a valve. Similarly, for a regular heptagon, a heptagon similar to the regular heptagon is also allowed. That is, it includes a dimensional error in the manufacturing process and a design allowable dimensional error.

  In adjacent communication ports, an angle θp formed by a center line connecting each communication port and the valve body shaft 71 is θp = (2π / N) radians = 360 ° / 7 = 51.4 °. The angle θp is referred to as 1 pitch. Here, the interval between the communication port B and the communication port C is an interval of 2 pitches (= 2θp) in the counterclockwise direction in the figure, and no communication port is arranged at the apex ap1 of the regular heptagon 91 therebetween. The communication ports C, D, and E are arranged adjacent to each other at the corresponding apexes of the regular heptagon 91 by one pitch (= θp) in the illustrated counterclockwise direction. That is, the range from the communication port B to the communication port E is 4 pitches (= 4θp), and no communication port is arranged at the apex ap2 and the apex ap3.

  If the valve body sliding contact surface 81 of the valve body 80 also covers a range of 4 pitches (= 4θp), the valve body 80 can simultaneously cover the communication ports B, C, D, and E. That is, in this embodiment, as shown in FIG. 16, a plurality of communication pipe connection portions (communication ports B, C, D, E) are respectively arranged on the vertices of a virtual regular heptagon on the valve seat 67b. The plurality of communication pipe connections are 4 ports, and the valve body 80 has means for simultaneously closing five vertices of the regular heptagon, so that the valve body 80 simultaneously connects the communication ports B, C, D, and E. Can be covered.

  Further, in the present embodiment, the communication recess 82 is provided so as to communicate only within a range of 1 pitch (= θp), and is provided at a position where the apex ap1 where the communication port is not provided and the communication port C are communicated. That is, the communication port C communicates with the communication recess 82, and the communication ports B, D, and E are covered with the valve body sliding contact surface 81. Since the communication recess 82 is only a recess provided in a part of the valve body 80, the communication ports B, C, D, and E are all covered in the state shown in FIG. Since it does not communicate with, it can be said that it is in a fully closed state.

  The valve body 80 swings clockwise (plus direction) or counterclockwise (minus direction) from the angle 0 with the fully closed state shown in FIG. 16 is a view of the refrigerant switching valve 60 as viewed from the G direction on the lower surface, and therefore, the rotation axis is a forward direction from the front side to the back side in the figure, and the clock is operated according to the right-handed screw rule. The direction swing is defined as plus and the counterclockwise swing is defined as minus.

  In the present embodiment, it is assumed that the pitch is swung by one pitch (= θp) in the clockwise direction and three pitches (= −3θp) in the counterclockwise direction, and the communication port is opened every time one pitch (= θp) is swung in each direction. Since the open / closed states of B, C, D, and E change, description will be made with reference to FIG.

  FIG. 17 is an explanatory view showing the arrangement of the communication ports and the swinging of the valve body, and is illustrated in the same manner as FIG. 16, and the valve body sliding contact surface 81 of the valve body 80 is around the valve body shaft 71. (1) is a first state where the pitch is swung by 3 pitches (= −3θp) in the minus direction, (2) is a second state where the pitch is swung by 2 pitches (= −2θp) in the minus direction, and (3) is 1 in the minus direction. The third state where the pitch (= −θp) is swung, (4) is the fourth state where the angle = 0 as in FIG. 16, and (5) is the fifth state where the pitch is swung by one pitch (= θp). Show. The valve body 80 swings from the first state (1) to the fifth state (5) and reversibly swings from the fifth state (5) to the first state (1). is there.

18 shows the refrigerant circuit when the refrigerant switching valve 60 is sequentially swung by one pitch (= θp) corresponding to the fifth state of (5) from the first state of FIG. 17 (1). It is a schematic diagram to explain.
In FIG. 18, the communication port B and the communication port D are connected to both ends of the second refrigerant pipe 56, and the dew condensation prevention pipe 17 is provided between the communication port B and the communication port D. The communication port C is connected to the fourth refrigerant pipe 57b, and the communication port E is connected to the third refrigerant pipe 57a.

  In the first state of FIG. 18 (1), the communication port C is opened, and the communication port B, the communication port D, and the communication port E are closed. Since both ends of the second refrigerant pipe 56 are closed, the refrigerant compressed by the compressor 51 and flowing in from the inlet A of the refrigerant switching valve 60 via the condenser 52 passes through the valve case 66 to the communication port C. Flowing. The refrigerant passes through the fourth refrigerant pipe 57 b from the communication port C and passes through the second decompression means 54 b that is a thin tube, and then adiabatically expands to become low temperature and low pressure, and flows into the cooler 7 through the junction portion 89. The low-temperature refrigerant that has flowed into the cooler 7 (cooler pipe 7d) is in the fifth mode shown in FIG. 9, in which heat is exchanged with ambient air and returned to the compressor 51.

  In the second state of FIG. 18B, the communication port B is opened, the communication port C is closed, and the communication port D and the communication port E are opened to the communication recess 82 and communicate with each other. The refrigerant compressed by the compressor 51 and flowing from the inlet A of the refrigerant switching valve 60 through the condenser 52 flows out from the communication port B to the second refrigerant pipe 56 through the valve case 66. The refrigerant flows into the communication recess 82 from the communication port D via the dew condensation prevention pipe 17, flows out of the communication port E, passes through the first pressure reducing means 54a which is a narrow tube through the third refrigerant pipe 57a, and then heat-insulated. It expands to a low temperature and a low pressure, and flows into the cooler 7 through the junction portion 89. The low-temperature refrigerant that has flowed into the cooler 7 (cooler pipe 7d) is in the first mode shown in FIG. 5 in which heat is exchanged with ambient air and returned to the compressor 51.

  In the third state of FIG. 18 (3), the communication port B opens, and the communication port C and the communication port D open to the communication recess 82 and communicate with each other. The refrigerant compressed by the compressor 51 and flowing from the inlet A of the refrigerant switching valve 60 through the condenser 52 flows out from the communication port B to the second refrigerant pipe 56 through the valve case 66. The refrigerant flows into the communication recess 82 from the communication port D via the dew condensation prevention pipe 17, flows out of the communication port C, passes through the fourth refrigerant pipe 57b, passes through the second decompression means 54b, which is a thin tube, It expands to a low temperature and a low pressure, and flows into the cooler 7 through the junction portion 89. The low-temperature refrigerant that has flowed into the cooler 7 (cooler pipe 7d) is in the second mode shown in FIG. 6, in which heat is exchanged with ambient air and returned to the compressor 51.

  In the fourth state of FIG. 18 (4), the communication port B, the communication port C, the communication port D, and the communication port E are all closed, the compressor 51 is stopped, and the refrigerant does not flow, as shown in FIG. This is the third mode.

  In the fifth state of FIG. 18 (5), the communication port B, the communication port C, and the communication port D are closed, and the communication port E is open. The refrigerant compressed by the compressor 51 and flowing in from the inlet A of the refrigerant switching valve 60 through the condenser 52 flows out of the communication port E through the valve case 66, passes through the third refrigerant pipe 57a, and is a narrow tube. After passing through one decompression means 54 a, it adiabatically expands to become a low temperature and low pressure and flows into the cooler 7. The low-temperature refrigerant that has flowed into the cooler 7 (cooler pipe 7d) is in the fourth mode shown in FIG. 8, in which heat is exchanged with ambient air and returned to the compressor 51.

<Action and effect>
As described with reference to FIGS. 16 to 18, the refrigerant switching valve 60 according to the first embodiment includes any one of a plurality of adjacent communication pipe connection portions (communication port B, communication port C, communication port D, and communication port E). In the case where the communication recess 82 is provided for communicating the valve body 80 and the valve body 80 swings at an angle formed by adjacent vertices of the regular polygon, the open / close states of the plurality of communication pipe connecting portions change. That is, by switching the valve body 80,
The inflow pipe 68 (inlet A) and the communication pipe 69c (communication opening C) communicate with each other, and the communication pipe 69b (communication opening B), the communication pipe 69d (communication opening D), and the communication pipe 69e (communication opening E). A first state of closing (see FIG. 18 (1));
The inflow pipe 68 (inlet A) and the communication pipe 69b (communication opening B) communicate with each other, the communication pipe 69c (communication opening C) is closed, and the communication pipe 69d (communication opening D) and the communication pipe 69e (communication opening E). ) Communicate with each other (see FIG. 18 (2)),
The inflow pipe 68 (inlet A) and the communication pipe 69b (communication port B) communicate with each other, and the communication pipe 69c (communication port C) and the communication pipe 69d (communication port D) communicate with each other, and the communication pipe 69e (communication) A third state in which the mouth E) is closed (see FIG. 18 (3));
A fourth state in which the communication pipe 69b (communication port B), the communication pipe 69c (communication port C), the communication pipe 69d (communication port D), and the communication pipe 69e (communication port E) are closed (see FIG. 18 (4)). ,
The inflow pipe 68 (inlet A) and the communication pipe 69e (communication port E) communicate with each other, and the communication pipe 69b (communication port B), the communication pipe 69c (communication port C), and the communication pipe 69d (communication port D) are blocked. The fifth state (see FIG. 18 (5)) can be switched.

  Thereby, the refrigerant switching valve 60 with improved refrigerant switching performance can be provided. In addition, the refrigerant can be switched in accordance with the actual use state of the device (refrigerator) provided with the refrigerant switching valve 60.

Further, as described with reference to FIGS. 5 to 9 and FIGS. 16 to 18, the device (refrigerator) including the refrigerant switching valve 60 according to the first embodiment supplies refrigerant having a temperature higher than the outside air to the condensation prevention pipe 17. The first mode (see FIGS. 5 and 18 (2)) and the second mode (see FIGS. 6 and 18 (3)) to prevent condensation,
A third mode (see FIGS. 7 and 18 (4)) that maintains the temperature of the refrigerant in the cooler 7 at a low temperature when the compressor 51 is stopped;
A fourth mode (see FIGS. 8 and 18 (5)) and a fifth mode (see FIGS. 9 and 18 (1)) for reducing heat leakage from the dew condensation prevention pipe 17;
These five refrigerant paths (refrigerant circuits) can be switched by the operation of the only refrigerant switching valve 60.

  Furthermore, it can be switched to use the first decompression means 54a in the first mode and to use the second decompression means 54b in the second mode.

  Furthermore, it can be switched to use the first decompression means 54a in the fourth mode and use the second decompression means 54b in the fifth mode.

  Thereby, the valve provided in the refrigerant path (refrigerant circuit) of the device (refrigerator) is only the refrigerant switching valve 60, and it is possible to configure a refrigeration cycle without requiring the addition of other valves. be able to. In addition, since the valve switching control and arrangement are not complicated, the reliability of the device (refrigerator) including the refrigerant switching valve 60 can be improved.

  In addition, the device (refrigerator) including the refrigerant switching valve 60 according to the first embodiment has a refrigerant path (refrigerant circuit) when the outside air is hot and humid and there is a risk of condensation depending on the measurement result of the outside air humidity sensor. ) Is switched to the first mode (see FIG. 5 and FIG. 18 (2)) or the second mode (see FIG. 6 and FIG. 18 (3)), and when the outside air is low in humidity and there is no risk of condensation, the refrigerant path The (refrigerant circuit) can be switched to the fourth mode (see FIGS. 8 and 18 (5)) or the fifth mode (see FIGS. 9 and 18 (1)). This mode can be switched by the operation of the refrigerant switching valve 60 as described above. Thereby, when there is a possibility of dew condensation, it is possible to prevent dew condensation by passing a high-temperature refrigerant through the dew condensation prevention pipe 17 and setting the temperature of the opening front peripheral edge of the storage chamber higher than the storage chamber temperature. Moreover, when there is no possibility of dew condensation, it is possible to stop the passage of the refrigerant through the dew condensation prevention pipe 17 and to prevent the heat from the dew condensation prevention pipe 17 from leaking into the storage chamber and increasing the energy consumption.

  Further, in the first mode (see FIGS. 5 and 18 (2)) and the fifth mode (see FIGS. 9 and 18 (1)), the rotation angle of the valve body 80 rotates only by 1 pitch (= θp). The first mode that passes through the dew condensation prevention pipe 17 and the first pressure reducing means 54a, and the fifth mode that passes through the second pressure reduction means 54b without going through the condensation prevention pipe 17 are possible. There is an effect that can be switched in a short time.

  In the first mode (see FIGS. 5 and 18 (2)) and the second mode (see FIGS. 6 and 18 (3)), the rotation angle of the valve body 80 is rotated by one pitch (= θp). Therefore, the pressure is reduced between the first mode passing through the dew condensation preventing pipe 17 and the first pressure reducing means 54a and the second mode passing through the dew condensation preventing pipe 17 and the second pressure reducing means 54b. There is an effect that only the means 54a and 54b can be switched in a short time.

  In the refrigerant switching valve 60 according to the first embodiment, the high-pressure refrigerant from the compressor 51 is supplied from the first refrigerant pipe 55 (see FIG. 5), the inflow pipe 68 (see FIG. 11), and the inlet A (see FIG. 12). It flows into the space in the valve case 66 through the. For this reason, a force in the direction of pressing the valve body 80 against the valve seat plate 67 is applied to the valve body 80 in the valve case 66. Thereby, the contact | adherence performance between the valve body sliding contact surface 81 and the valve seat plate 67 improves, and the leakage of a refrigerant | coolant can be reduced.

  In the refrigerant switching valve 60 according to the first embodiment, a rotor pinion gear 75 that rotates integrally with the rotor 70 and the rotor drive unit 74 is overlaid on the valve body 80, and the rotor pinion gear 75 and the valve body 80 are coaxially arranged. An idler gear 79 which is rotatably arranged around a valve body shaft 71 which is a common rotation shaft and which is provided with an idler large gear 79b and an idler pinion 79a integrally around an idler shaft 78 provided separately from the valve body shaft 71. It is arranged. Then, the rotor pinion gear 75 and the idler large gear 79b mesh with each other to decelerate, and the idler pinion 79a and the valve body gear 83 mesh with each other to further decelerate. As a result, the three gears of the rotor pinion gear 75, the idler gear 79, and the valve body gear 83 can be arranged around the two shafts of the valve body shaft 71 and the idler shaft 78, so the projected area of the two gears The three gears can be arranged in the same, and the refrigerant switching valve 60 can be downsized.

  Further, since the speed reduction from the rotor pinion gear 75 to the valve body gear 83 is performed in two stages, the reduction ratio is increased and the rotational torque transmitted to the valve body 80 can be increased. Can be sure. Further, even if the friction between the valve body 80 and the valve seat (second valve seat plate 67b) increases, the rotational torque is not insufficient. Therefore, a special low friction material is applied to the valve body 80. The refrigerant switching valve 60 can be reduced in price because it can be operated even if it is a combination of a stator and a rotor having a low rotational torque.

  As shown in FIG. 11, in the refrigerant switching valve 60 according to the first embodiment, the rotor 70 (the rotor drive unit 74, the rotor pinion gear 75) and the valve body 80 are arranged coaxially with a common valve body shaft 71, The rotor 70 (the rotor drive unit 74 and the rotor pinion gear 75) is placed on the valve body 80, and the rotor 70 (the rotor drive unit 74 and the rotor pinion gear 75) is urged by the leaf spring 86. As a result, the valve body 80 is urged against the valve seat (second valve seat plate 67b) by the urging force of the leaf spring 86 and the weight of the rotor 70 (rotor drive unit 74, rotor pinion gear 75). By setting an appropriate pressing force, it is possible to obtain a pressure that reliably seals the refrigerant on the valve body sliding contact surface 81.

  As shown in FIG. 11, in the refrigerant switching valve 60 according to the first embodiment, the valve body shaft 71 that supports the valve body 80 has a valve seat (second seat) that contacts the valve body 80 at the valve body sliding contact surface 81. Of the valve seat plate 67b) and a rotor bearing 73 which is a recess provided at the upper end of the valve case 66. In addition, it is easy to obtain accuracy and the refrigerant can be reliably sealed at the valve body sliding contact surface 81. In addition, since the rotor 70 (the rotor drive unit 74 and the rotor pinion gear 75) rotates around the valve body shaft 71, it is not necessary to provide a highly accurate bearing in the rotor shaft hole 72 and the rotor bearing 73, and the refrigerant The switching valve 60 can be reduced in price.

  In addition, by making the rotor 70 (the rotor driving unit 74 and the rotor pinion gear 75) and the valve body 80 coaxial, the valve body shaft 71 can be lengthened. By increasing the length of the valve body shaft 71, the inclination of the valve body shaft 71 with respect to machining errors of the rotor shaft hole 72 and the rotor bearing 73 is reduced, and the accuracy of the perpendicularity of the valve body shaft 71 with respect to the second valve seat plate 67b. Therefore, it is easy to obtain the accuracy of the valve body 80, and the refrigerant can be reliably sealed at the valve body sliding contact surface 81.

  As shown in FIG. 11, in the refrigerant switching valve 60 according to the first embodiment, the idler shaft 78 has a cantilever structure, and the assemblability of the refrigerant switching valve 60 is improved. Even when the idler gear 79 moves upward, the idler large gear 79b contacts the rotor drive unit 74, so that the idler gear 79 can be prevented from falling off. Further, it is desirable to reduce the contact area by forming the protrusion 74 s on the rotor driving unit 74 and the protrusion 79 s on the idler gear 79.

<< Second Embodiment >>
Next, the refrigerant | coolant switching valve which concerns on 2nd Embodiment, and an apparatus provided with this are demonstrated using FIG.

  FIG. 19 shows that the refrigerant switching valve 60 according to the second embodiment sequentially swings the valve body 80 by one pitch (= θp) corresponding to the first state of (1) to the fifth state of (5) in FIG. It is a schematic diagram explaining the refrigerant circuit at the time of doing.

  The refrigerant switching valve 60 in the second embodiment is the same as that in the first example. In FIG. 19, the communication port B and the communication port D are connected to both ends of the second refrigerant pipe 56, and the dew condensation prevention pipe 17 is It is provided between the communication port B and the communication port D. The communication port C is connected to the fourth refrigerant pipe 57b, and the communication port E is connected to the third refrigerant pipe 57a.

  The second embodiment differs from the first embodiment in that the third refrigerant pipe 57a includes the first cooler 7a, the fourth refrigerant pipe 57b includes the second cooler 7b, and the third refrigerant pipe 57a After passing through the first decompression means 54 a, the refrigerant that has been adiabatically expanded to a low temperature and low pressure flows into the first cooler 7 a, passes through the junction 89, and returns to the compressor 51. In the fourth refrigerant pipe 57 b, after passing through the second decompression means 54 b, the refrigerant that has been adiabatically expanded to become low temperature and low pressure flows into the second cooler 7 b, passes through the junction portion 89, and returns to the compressor 51.

  Here, as an example, cooling in a freezing temperature zone and cooling in a refrigeration temperature zone, which are different from each other in a temperature zone, are performed by separate coolers, and the first cooler 7a is used for cooling the freezing chambers 3, 4, and 5. The second cooler 7 b is used for cooling the refrigerator compartment 2.

  In the first state of FIG. 19 (1), the communication port C is opened, and the communication port B, the communication port D, and the communication port E are closed. Since both ends of the second refrigerant pipe 56 are closed, the refrigerant compressed by the compressor 51 and flowing in from the inlet A of the refrigerant switching valve 60 via the condenser 52 passes through the valve case 66 to the communication port C. Flowing. The refrigerant returns from the communication port C to the compressor 51 via the fourth refrigerant pipe 57b and the second cooler 7b, and the cooler 7b cools the refrigerator compartment 2 and the vegetable compartment 6.

  In the second state of FIG. 19 (2), the communication port B is opened, the communication port C is closed, and the communication port D and the communication port E are opened to the communication recess 82 and communicate with each other. The refrigerant compressed by the compressor 51 and flowing from the inlet A of the refrigerant switching valve 60 through the condenser 52 flows out from the communication port B to the second refrigerant pipe 56 through the valve case 66. The refrigerant flows into the communication recess 82 from the communication port D via the dew condensation prevention pipe 17, flows out of the communication port E, passes through the third refrigerant pipe 57a, and passes through the first cooler 7a to the compressor 51. Returning to FIG. 3, the cooler 7a cools the freezing rooms 3, 4, and 5.

  In the third state of FIG. 19 (3), the communication port B is opened, and the communication port C and the communication port D are opened to the communication recess 82 and communicate with each other. The refrigerant compressed by the compressor 51 and flowing from the inlet A of the refrigerant switching valve 60 through the condenser 52 flows out from the communication port B to the second refrigerant pipe 56 through the valve case 66. The refrigerant flows into the communication recess 82 from the communication port D via the dew condensation prevention pipe 17, flows out of the communication port C, returns to the compressor 51 through the fourth refrigerant pipe 57b, and the second cooler 7b. The second cooler 7 b cools the refrigerator compartment 2 and the vegetable compartment 6.

  In the fourth state of FIG. 19 (4), the communication port B, the communication port C, the communication port D, and the communication port E are all closed, and the compressor 51 stops and no refrigerant flows.

  In the fifth state of FIG. 19 (5), the communication port B, the communication port C, and the communication port D are closed, and the communication port E is open. The refrigerant compressed by the compressor 51 and flowing from the inlet A of the refrigerant switching valve 60 through the condenser 52 flows out from the communication port E through the valve case 66 and passes through the third refrigerant pipe 57a to the first cooler. Returning to the compressor 51 via 7a, the first cooler 7a cools the freezing rooms 3, 4, and 5.

<Action and effect>
As illustrated in FIG. 19, the refrigerant switching valve 60 according to the second embodiment switches the valve body 80 so that the inflow pipe 68 (inlet A) and the communication pipe 69c (communication opening C) communicate with each other. A first state (see FIG. 19 (1)) in which the communication pipe 69b (communication port B), the communication pipe 69d (communication port D), and the communication pipe 69e (communication port E) are closed, and an inflow pipe 68 (inlet A) ) And the communication tube 69b (communication port B), the communication tube 69c (communication port C) is closed, and the communication tube 69d (communication port D) and the communication tube 69e (communication port E) communicate with each other. The two states (see FIG. 19 (2)), the inflow pipe 68 (inlet A) and the communication pipe 69b (communication port B) communicate with each other, and the communication pipe 69c (communication port C) and the communication pipe 69d (communication port D). ) Communicate with each other and the communication pipe 69e (communication port E) is closed. 19 (3)), the fourth state in which the communication tube 69b (communication port B), the communication tube 69c (communication port C), the communication tube 69d (communication port D), and the communication tube 69e (communication port E) are closed. (See FIG. 19 (4)), the inflow pipe 68 (inlet A) and the communication pipe 69e (communication port E) communicate with each other, and the communication pipe 69b (communication port B) and the communication pipe 69c (communication port C) The fifth state (see FIG. 19 (5)) in which the communication pipe 69d (communication port D) is closed can be switched. Thereby, the refrigerant switching valve 60 with improved refrigerant switching performance can be provided. In addition, the refrigerant can be switched in accordance with the actual use state of the device (refrigerator) provided with the refrigerant switching valve 60.

  Similar to the first embodiment, in the second embodiment as well, the valve provided in the refrigerant path (refrigerant circuit) of the device (refrigerator) is only the refrigerant switching valve 60, and it is necessary to add other valves. Since the refrigeration cycle can be configured, it can be configured at low cost. In addition, since the valve switching control and arrangement are not complicated, the reliability of the device (refrigerator) including the refrigerant switching valve 60 can be improved.

«Third embodiment»
Next, the refrigerant | coolant switching valve which concerns on 3rd Embodiment, and an apparatus provided with this are demonstrated using FIG. 20 and FIG.

  FIG. 20 is an explanatory view showing the arrangement of the communication ports and the swinging of the valve body as in FIG. 17, and the arrangement of the communication ports B, C, D, E is a regular heptagon as in the first embodiment. Disposed at the apex and different from the first embodiment, the communication recess 82 provided in the valve body 80 is provided to communicate only in the range of 1 pitch (= θp) in the first embodiment. However, in the third embodiment, the communication recess 82 is provided in a range of 2 pitches (= 2θp).

  16 to 17 (4), the state in which the communication ports B, C, D, and E are covered at the same time as shown in the fourth state is shown as the third state in FIG. 20 (3), and the communication recess 82 is the communication port. It arrange | positions so that between B and the communication port C may be connected.

  In FIG. 20, the valve body sliding contact surface 81 of the valve body 80 is swung around the valve body shaft 71 (1) in the minus direction by two pitches (= −2θp), and (2) is in the minus direction. The second state of rocking by 1 pitch (= −θp), (3) the third state of angle = 0, (4) the fourth state of rocking by 1 pitch (= θp) in the plus direction, and (5) A fifth state in which the pitch is swung by two pitches (= 2θp) in the plus direction is illustrated. The valve body 80 swings from the first state (1) to the fifth state (5) and reversibly swings from the fifth state (5) to the first state (1). is there.

  FIG. 21 illustrates a refrigerant circuit when the refrigerant switching valve 60 is sequentially swung by one pitch (= θp) corresponding to the first state of FIG. 20 (1) to the fifth state of (5). It is a schematic diagram to do.

  In FIG. 21, the communication port B and the communication port C are connected to both ends of the second refrigerant pipe 56, and the dew condensation prevention pipe 17 is provided between the communication port B and the communication port C. The communication port D is connected to the fourth refrigerant pipe 57b, and the communication port E is connected to the third refrigerant pipe 57a.

  In the first state of FIG. 21 (1), the communication port B is opened, and the communication port C, the communication port D, and the communication port E are opened to the communication recess 82 and communicate with each other. The refrigerant compressed by the compressor 51 and flowing from the inlet A of the refrigerant switching valve 60 through the condenser 52 flows out from the communication port B to the second refrigerant pipe 56 through the valve case 66. The refrigerant flows from the communication port C into the communication recess 82 via the dew condensation prevention pipe 17, a part flows out from the communication port D, and the remaining part flows out from the communication port E. The refrigerant flowing out of the communication port D passes through the fourth refrigerant pipe 57b and passes through the second decompression means 54b, which is a thin tube, and then adiabatically expands to become a low temperature and low pressure. The refrigerant flowing out from the communication port E passes through the third refrigerant pipe 57a, passes through the first decompression means 54a which is a thin tube, and then adiabatically expands to become a low temperature and low pressure. The refrigerant that has passed through the third refrigerant pipe 57a and the fourth refrigerant pipe 57b flows into the cooler 7 (cooler pipe 7d) via the junction portion 89. The low-temperature refrigerant that has flowed into the cooler 7 (cooler pipe 7 d) exchanges heat with ambient air in the cooler 7 and returns to the compressor 51.

  In the second state of FIG. 21 (2), the communication port B opens, and the communication port C and the communication port D open to the communication recess 82 and communicate with each other. The communication port E is closed. The refrigerant compressed by the compressor 51 and flowing from the inlet A of the refrigerant switching valve 60 through the condenser 52 flows out from the communication port B to the second refrigerant pipe 56 through the valve case 66. The refrigerant flows into the communication recess 82 from the communication port C via the dew condensation prevention pipe 17, flows out of the communication port D, passes through the fourth refrigerant pipe 57b, passes through the second decompression means 54b, which is a thin tube, and then heat-insulates. It expands to a low temperature and low pressure and flows into the cooler 7. The low-temperature refrigerant that has flowed into the cooler 7 (cooler pipe 7d) exchanges heat with the ambient air and returns to the compressor 51.

  In the third state of FIG. 21 (3), the communication port B and the communication port C open to the communication recess 82 and communicate with each other. The communication port D and the communication port E are closed. Since the communication port B and the communication port C communicate with each other, both ends of the second refrigerant pipe 56 are connected. However, since the communication recess 82 is a recess provided in the valve body 80, it does not communicate with the inside of the valve case 66. The compressor 51 stops and the refrigerant does not flow.

  In the fourth state of FIG. 21 (4), the communication port E is opened, and the communication port B, the communication port C, and the communication port D are closed. The refrigerant compressed by the compressor 51 and flowing from the inlet A of the refrigerant switching valve 60 through the condenser 52 flows out of the communication port E through the valve case 66, passes through the third refrigerant pipe 57a, and is a narrow tube. After passing through one decompression means 54 a, it adiabatically expands to become a low temperature and low pressure and flows into the cooler 7. The low-temperature refrigerant that has flowed into the cooler 7 (cooler pipe 7d) exchanges heat with the ambient air and returns to the compressor 51.

  In the fifth state of FIG. 21 (5), the communication port D and the communication port E are opened, and the communication port B and the communication port C are closed. The refrigerant compressed by the compressor 51 and flowing in from the inlet A of the refrigerant switching valve 60 through the condenser 52 flows out from the communication port D and the communication port E through the valve case 66. The refrigerant flowing out of the communication port D passes through the fourth refrigerant pipe 57b and passes through the second decompression means 54b, which is a thin tube, and then adiabatically expands to become a low temperature and low pressure. The refrigerant flowing out from the communication port E passes through the third refrigerant pipe 57a, passes through the first decompression means 54a which is a thin tube, and then adiabatically expands to become a low temperature and low pressure. The refrigerant that has passed through the third refrigerant pipe 57a and the fourth refrigerant pipe 57b flows into the cooler 7 (cooler pipe 7d) via the junction portion 89. The low-temperature refrigerant that has flowed into the cooler 7 (cooler pipe 7 d) exchanges heat with ambient air in the cooler 7 and returns to the compressor 51.

<Action and effect>
As described with reference to FIG. 21, in the refrigerant switching valve 60 according to the third embodiment, by switching the valve body 80, the inflow pipe 68 (inlet A) and the communication pipe 69b (communication B) communicate with each other. A first state (see FIG. 21 (1)) in which the communication pipe 69c (communication port C), the communication pipe 69d (communication port D), and the communication pipe 69e (communication port E) communicate with each other; A) and the communication tube 69b (communication port B) communicate with each other, the communication tube 69c (communication port C) and the communication tube 69d (communication port D) communicate with each other, and the communication tube 69e (communication port E) closes. The second state (see FIG. 21 (2)), the communication tube 69b (communication port B), and the communication tube 69c (communication port C) communicate with each other, and the communication tube 69d (communication port D) and the communication tube 69e ( The third state (see FIG. 21 (3)) in which the communication port E) is closed, and the flow The tube 68 (inlet A) and the communication tube 69e (communication port E) communicate with each other, and the communication tube 69b (communication port B), the communication tube 69c (communication port C), and the communication tube 69d (communication port D) are blocked. In addition, the inflow pipe 68 (inlet A), the communication pipe 69d (communication port D), and the communication pipe 69e (communication port E) communicate with each other and the communication pipe 69b (communication) (see FIG. 21 (4)). The fifth state (see FIG. 21 (5)) in which the port B) and the communication pipe 69c (communication port C) are closed can be switched. Thereby, the refrigerant switching valve 60 with improved refrigerant switching performance can be provided. In addition, the refrigerant can be switched in accordance with the actual use state of the device (refrigerator) provided with the refrigerant switching valve 60.

  Also in the third embodiment, the valve provided in the refrigerant path (refrigerant circuit) of the device (refrigerator) is only the refrigerant switching valve 60, and it is possible to configure a refrigeration cycle without the need for adding other valves. It can be configured at low cost. In addition, since the valve switching control and arrangement are not complicated, the reliability of the device (refrigerator) including the refrigerant switching valve 60 can be improved.

<< Fourth Embodiment >>
Next, the refrigerant switching valve according to the fourth embodiment and a device including the refrigerant switching valve will be described with reference to FIGS. 22 and 23.

  FIG. 22 is an explanatory view showing the arrangement of the communication ports and the swinging of the valve body as in FIGS. 20 to 17, and the arrangement of the communication ports B, C, D, and E is the same as in the first embodiment. Unlike the first embodiment, the communication ports B, C, D, and E are provided adjacent to each other by one pitch (= θp), and the angle range in which the communication ports are disposed. Is 3 pitches (= 3θp) in the fourth embodiment, compared to 4 pitches (= 4θp) in the first embodiment.

  The valve body sliding contact surface 81 of the valve body 80 is provided in the range of 4 pitches (= 4θp) as in the first embodiment, and the communication recess 82 is in the range of 1 pitch (= θp). Unlike the example, one pitch is closer to one end of four pitches (= 4θp), and is provided between the communication port B and the apex ap4 in FIG.

  A state in which the communication ports B, C, D, and E are simultaneously covered is shown as a third state in FIG. 22 (3), and the communication recess 82 is provided to extend in the direction opposite to the communication port C with respect to the communication port B.

  In FIG. 22, the valve body sliding contact surface 81 of the valve body 80 is swung around the valve body shaft 71 (1) in the minus direction by two pitches (= −2θp), and (2) is in the minus direction. The second state of rocking by 1 pitch (= −θp), (3) the third state of angle = 0, (4) the fourth state of rocking by 1 pitch (= θp) in the plus direction, and (5) A fifth state in which the pitch is swung by two pitches (= 2θp) in the plus direction is illustrated. The valve body 80 swings from the first state (1) to the fifth state (5) and reversibly swings from the fifth state (5) to the first state (1). is there.

  FIG. 23 illustrates a refrigerant circuit when the refrigerant switching valve 60 is sequentially swung by one pitch (= θp) corresponding to the fifth state of (5) from the first state of FIG. It is a schematic diagram to do.

  In FIG. 23, the communication port B and the communication port C are connected to both ends of the second refrigerant pipe 56, and the dew condensation prevention pipe 17 is provided between the communication port B and the communication port C. The communication port D is connected to the fourth refrigerant pipe 57b, and the communication port E is connected to the third refrigerant pipe 57a.

  In the first state of FIG. 23 (1), the communication port B is opened, and the communication port C and the communication port D are opened to the communication recess 82 and communicate with each other. The communication port E is closed. The refrigerant compressed by the compressor 51 and flowing from the inlet A of the refrigerant switching valve 60 through the condenser 52 flows out from the communication port B to the second refrigerant pipe 56 through the valve case 66. The refrigerant flows into the communication recess 82 from the communication port C via the dew condensation prevention pipe 17, flows out of the communication port D, passes through the fourth refrigerant pipe 57b, passes through the second decompression means 54b, which is a thin tube, and then heat-insulates. It expands to a low temperature and a low pressure, and flows into the cooler 7 through the junction portion 89. The low-temperature refrigerant that has flowed into the cooler 7 (cooler pipe 7d) exchanges heat with the ambient air and returns to the compressor 51.

In the second state of FIG. 23 (2), the communication pipe 69b (communication port B) and the communication pipe 69c (communication port C) open to the communication recess 82 and communicate with each other. The communication port D and the communication port E are closed. Both ends of the second refrigerant pipe 56 are communicated with each other through the communication recess 82 but do not communicate with the inside of the valve case 66, and the communication port B, the communication port C, the communication port D, and the communication port E are all closed. .
The compressor 51 stops and the refrigerant does not flow.

  In the third state of FIG. 23 (3), the communication port B, the communication port C, the communication port D, and the communication port E are all closed. The compressor 51 stops and the refrigerant does not flow.

  In the fourth state of FIG. 23 (4), the communication port E is opened, and the communication port B, the communication port C, and the communication port D are closed. The refrigerant that has been compressed by the compressor 51 and has flowed from the inlet A of the refrigerant switching valve 60 through the condenser 52 flows out of the communication port E through the valve case 66 and is a narrow pipe through the third refrigerant pipe 57a. After passing through the first pressure reducing means 54 a, it adiabatically expands to become a low temperature and low pressure, and flows into the cooler 7 through the junction portion 89. The low-temperature refrigerant that has flowed into the cooler 7 (cooler pipe 7d) exchanges heat with the ambient air and returns to the compressor 51.

  In the fifth state of FIG. 23 (5), the communication port D and the communication port E are opened, and the communication port B and the communication port C are closed. A part of the refrigerant compressed by the compressor 51 and flowing in from the inlet A of the refrigerant switching valve 60 through the condenser 52 flows out from the communication port D through the valve case 66, and the rest flows out from the communication port E. . The refrigerant flowing out of the communication port D passes through the fourth refrigerant pipe 57b and passes through the second decompression means 54b, which is a thin tube, and then adiabatically expands to become a low temperature and low pressure. The refrigerant flowing out from the communication port E passes through the third refrigerant pipe 57a, passes through the first decompression means 54a which is a thin tube, and then adiabatically expands to become a low temperature and low pressure. The refrigerant that has passed through the third refrigerant pipe 57a and the fourth refrigerant pipe 57b flows into the cooler 7 (cooler pipe 7d) via the junction portion 89. The low-temperature refrigerant that has flowed into the cooler 7 (cooler pipe 7 d) exchanges heat with ambient air in the cooler 7 and returns to the compressor 51.

<Action and effect>
As described with reference to FIG. 23, the refrigerant switching valve 60 according to the fourth embodiment switches the valve body 80 so that the inflow pipe 68 (inlet A) and the communication pipe 69b (communication B) communicate with each other. The communication pipe 69c (communication port C) and the communication pipe 69d (communication port D) communicate with each other and the communication pipe 69e (communication port E) is closed (see FIG. 23 (1)), and the communication pipe 69b. (Communication port B) and communication tube 69c (communication port C) communicate with each other, and communication tube 69d (communication port D) and communication tube 69e (communication port E) are closed (FIG. 23 (2) )), And the third state in which the communication tube 69b (communication port B), the communication tube 69c (communication port C), the communication tube 69d (communication port D), and the communication tube 69e (communication port E) are closed (see FIG. 23 (3)), inflow pipe 68 (inlet A) and communication pipe 69e (communication E) A fourth state (see FIG. 23 (4)) in which the communication pipe 69b (communication port B), the communication pipe 69c (communication port C), and the communication pipe 69d (communication port D) are closed, and the inflow pipe 68. (Inlet A), communication tube 69d (communication port D) and communication tube 69e (communication port E) communicate with each other, and communication tube 69b (communication port B) and communication tube 69c (communication port C) are closed. 5 states (see FIG. 23 (5)) can be switched. Thereby, the refrigerant switching valve 60 with improved refrigerant switching performance can be provided. In addition, the refrigerant can be switched in accordance with the actual use state of the device (refrigerator) provided with the refrigerant switching valve 60.

  Also in the fourth embodiment, the valve provided in the refrigerant path (refrigerant circuit) of the device (refrigerator) is only the refrigerant switching valve 60, and it is possible to configure a refrigeration cycle without requiring the addition of other valves. It can be configured at low cost. In addition, since the valve switching control and arrangement are not complicated, the reliability of the device (refrigerator) including the refrigerant switching valve 60 can be improved.

  In the present embodiment, the cooler 7 is single as in the first embodiment, but the same effect can be obtained even in a configuration including a plurality of coolers as in the second embodiment.

«Fifth embodiment»
Next, the refrigerant | coolant switching valve 60 which concerns on 5th Embodiment, and an apparatus provided with this are demonstrated using FIG. FIG. 24 illustrates a refrigerant circuit when the refrigerant switching valve 60 is sequentially swung by one pitch (= θp) corresponding to the fifth state of FIG. 22 (1) to the fifth state of (5). It is a schematic diagram to do.

  The configuration of the refrigerant switching valve 60 according to the fifth embodiment is the same as that of the fourth example. The difference from the fourth embodiment is that the first cooler 7a and the second cooler 7b are provided, and the third refrigerant pipe 57a is provided with the first cooler 7a between the first decompression means 54a and the merging portion 89. The second cooler 7b is provided between the junction portion 89 and the compressor 51.

  In the first state of FIG. 24 (1), the communication port B is opened, and the communication port C and the communication port D are opened to the communication recess 82 and communicate with each other. The communication port E is closed. The refrigerant compressed by the compressor 51 and flowing from the inlet A of the refrigerant switching valve 60 through the condenser 52 flows out from the communication port B to the second refrigerant pipe 56 through the valve case 66. The refrigerant flows into the communication recess 82 from the communication port C via the dew condensation prevention pipe 17, flows out of the communication port D, passes through the fourth refrigerant pipe 57b, passes through the second decompression means 54b, which is a thin tube, and then heat-insulates. It expands to low temperature and low pressure, flows into the first cooler 7a, and further flows into the second cooler 7b through the junction 89, and the low-temperature refrigerant flows into the first cooler 7a and the second cooler 7b. To return to the compressor 51 after exchanging heat with ambient air.

In the second state of FIG. 24 (2), the communication tube 69b (communication port B) and the communication tube 69c (communication port C) open to the communication recess 82 and communicate with each other. The communication port D and the communication port E are closed. Both ends of the second refrigerant pipe 56 are communicated with each other through the communication recess 82 but do not communicate with the inside of the valve case 66, and the communication port B, the communication port C, the communication port D, and the communication port E are all closed. .
The compressor 51 stops and the refrigerant does not flow.

  In the third state of FIG. 24 (3), the communication port B, the communication port C, the communication port D, and the communication port E are all closed. The compressor 51 stops and the refrigerant does not flow.

  In the fourth state of FIG. 24 (4), the communication port E is opened, and the communication port B, the communication port C, and the communication port D are closed. The refrigerant that has been compressed by the compressor 51 and has flowed from the inlet A of the refrigerant switching valve 60 through the condenser 52 flows out of the communication port E through the valve case 66 and is a narrow pipe through the third refrigerant pipe 57a. After passing through the first decompression means 54a, it adiabatically expands to become a low temperature and low pressure, flows into the second cooler 7b through the junction 89, and the low temperature refrigerant exchanges heat with ambient air in the second cooler 7b. And it returns to the compressor 51.

  In the fifth state of FIG. 24 (5), the communication port D and the communication port E are opened, and the communication port B and the communication port C are closed. A part of the refrigerant compressed by the compressor 51 and flowing in from the inlet A of the refrigerant switching valve 60 through the condenser 52 flows out from the communication port D through the valve case 66, and the rest flows out from the communication port E. . The refrigerant flowing out of the communication port D passes through the fourth refrigerant pipe 57b and passes through the second decompression means 54b, which is a thin tube, and then adiabatically expands to become a low temperature and low pressure. The refrigerant that has passed through the fourth refrigerant pipe 57b flows into the first cooler 7a, and the low-temperature refrigerant exchanges heat with the ambient air and returns to the compressor 51 via the junction 89. The refrigerant flowing out from the communication port E passes through the third refrigerant pipe 57a, passes through the first decompression means 54a which is a thin tube, and then adiabatically expands to become a low temperature and low pressure. The refrigerant that has passed through the third refrigerant pipe 57 a flows into the second cooler 7 b through the junction portion 89, and the low-temperature refrigerant exchanges heat with the ambient air and returns to the compressor 51.

<Action and effect>
As described with reference to FIG. 24, the refrigerant switching valve 60 according to the fifth embodiment switches the valve body 80 so that the inflow pipe 68 (inlet A) and the communication pipe 69b (communication B) communicate with each other. The communication pipe 69c (communication port C) and the communication pipe 69d (communication port D) communicate with each other, and the communication pipe 69e (communication port E) is closed (see FIG. 24 (1)), and the communication pipe 69b. (Communication port B) and communication tube 69c (communication port C) communicate with each other, and communication tube 69d (communication port D) and communication tube 69e (communication port E) are closed (FIG. 24 (2) )), And the third state in which the communication tube 69b (communication port B), the communication tube 69c (communication port C), the communication tube 69d (communication port D), and the communication tube 69e (communication port E) are closed (see FIG. 24 (3)), inflow pipe 68 (inlet A) and communication pipe 69e (communication E) A fourth state (see FIG. 24 (4)) in which the communication pipe 69b (communication port B), the communication pipe 69c (communication port C), and the communication pipe 69d (communication port D) are closed, and the inflow pipe 68. (Inlet A), communication tube 69d (communication port D) and communication tube 69e (communication port E) communicate with each other, and communication tube 69b (communication port B) and communication tube 69c (communication port C) are closed. 5 states (see FIG. 24 (5)) can be switched. Thereby, the refrigerant switching valve 60 with improved refrigerant switching performance can be provided. In addition, the refrigerant can be switched in accordance with the actual use state of the device (refrigerator) provided with the refrigerant switching valve 60.

  Also in the fifth embodiment, the valve provided in the refrigerant path (refrigerant circuit) of the device (refrigerator) is only the refrigerant switching valve 60, and it is possible to configure a refrigeration cycle without the need to add other valves. It can be configured at low cost. In addition, since the valve switching control and arrangement are not complicated, the reliability of the device (refrigerator) including the refrigerant switching valve 60 can be improved.

<< Sixth Embodiment >>
Next, the refrigerant | coolant switching valve 60 which concerns on 6th Embodiment, and an apparatus provided with this are demonstrated using FIG.

  25, similarly to FIG. 24, the refrigerant switching valve 60 is swung sequentially by 1 pitch (= θp) in correspondence with the first state of FIG. 22 (1) to the fifth state of (5). It is a schematic diagram explaining the refrigerant circuit at the time. The configuration of the refrigerant switching valve 60 according to the sixth embodiment is the same as that of the fourth example. The difference from the fourth embodiment is that the condenser 52 is not provided between the compressor 51 and the inlet A of the refrigerant switching valve 60 but between the communication port B and the dew condensation prevention pipe 17. That is, the first decompression means 54a is not disposed in the refrigerant pipe 57a.

  In FIG. 25, the communication port B and the communication port C are connected to both ends of the second refrigerant pipe 56, and the condenser 52 and the dew condensation prevention pipe 17 are provided between the communication port B and the communication port C. The communication port D is connected to the fourth refrigerant pipe 57b, and the communication port E is connected to the third refrigerant pipe 57a.

    In the first state of FIG. 25 (1), the communication port B is opened, and the communication port C and the communication port D are opened to the communication recess 82 and communicate with each other. The communication port E is closed. The refrigerant compressed by the compressor 51 and flowing in from the inlet A of the refrigerant switching valve 60 flows out from the communication port B to the second refrigerant pipe 56 through the valve case 66. The refrigerant flows into the communication recess 82 from the communication port C through the condenser 52 and the dew condensation prevention pipe 17, flows out of the communication port D, and passes through the fourth refrigerant pipe 57b and the second decompression means 54b which is a thin tube. After that, it adiabatically expands to become a low temperature and low pressure, and flows into the cooler 7 through the junction portion 89. The low-temperature refrigerant that has flowed into the cooler 7 (cooler pipe 7d) exchanges heat with the ambient air and returns to the compressor 51.

In the second state shown in FIG. 25 (2), the communication pipe 69b (communication port B) and the communication pipe 69c (communication port C) open to the communication recess 82 and communicate with each other. The communication port D and the communication port E are closed. Both ends of the second refrigerant pipe 56 are communicated with each other through the communication recess 82 but do not communicate with the inside of the valve case 66, and the communication port B, the communication port C, the communication port D, and the communication port E are all closed. .
The compressor 51 stops and the refrigerant does not flow.

  In the third state of FIG. 25 (3), the communication port B, the communication port C, the communication port D, and the communication port E are all closed. The compressor 51 stops and the refrigerant does not flow.

  In the fourth state of FIG. 25 (4), the communication port E is opened, and the communication port B, the communication port C, and the communication port D are closed. The refrigerant compressed by the compressor 51 and flowing in from the inlet A of the refrigerant switching valve 60 flows out from the communication port E through the valve case 66, passes through the third refrigerant pipe 57 a, passes through the junction portion 89, and then enters the cooler 7. Flow into. The refrigerant flowing into the cooler 7 is a refrigerant discharged at high temperature and high pressure from the compressor 51, and heats the cooler 7 and returns to the compressor 51.

<Action and effect>
As described with reference to FIG. 25, the refrigerant switching valve 60 according to the sixth embodiment switches the valve body 80 so that the inflow pipe 68 (inlet A) and the communication pipe 69b (communication B) communicate with each other. The communication pipe 69c (communication port C) and the communication pipe 69d (communication port D) communicate with each other and the communication pipe 69e (communication port E) is closed (see FIG. 25 (1)), and the communication pipe 69b. (Communication port B) and communication tube 69c (communication port C) communicate with each other, and communication tube 69d (communication port D) and communication tube 69e (communication port E) are closed (FIG. 25 (2)). )), And the third state in which the communication tube 69b (communication port B), the communication tube 69c (communication port C), the communication tube 69d (communication port D), and the communication tube 69e (communication port E) are closed (see FIG. 25 (3)), inflow pipe 68 (inlet A) and communication pipe 69e (communication port E). The communication pipe 69b (communication port B), the communication pipe 69c (communication port C), and the fourth state in which the communication pipe 69d (communication port D) is closed (see FIG. 25 (4)) are switched. Can do. In this fourth state, the refrigerant discharged from the compressor 51 at a high temperature and high pressure flows into the cooler 7 to heat the cooler 7, so that when frost adheres to the cooler 7 in a high humidity environment. Since the frost adhering to the cooler 7 can be defrosted by the heat of the refrigerant, the defrost heater 35 becomes unnecessary. In addition, since the amount of heat generated by the defrost heater 35 can be reduced, energy saving can be realized.

Thereby, the refrigerant switching valve 60 with improved refrigerant switching performance can be provided. In addition, the refrigerant can be switched in accordance with the actual use state of the equipment (refrigerator) provided with the refrigerant switching valve 60. Also in the sixth embodiment, the refrigerant path (refrigerant circuit) of the equipment (refrigerator) is provided. Since only the refrigerant switching valve 60 is used as the valve, and a refrigeration cycle can be constructed without the need for adding other valves, the refrigerant can be constructed at low cost. In addition, since the valve switching control and arrangement are not complicated, the reliability of the device (refrigerator) including the refrigerant switching valve 60 can be improved.

<< Seventh Embodiment >>
Next, the refrigerant | coolant switching valve 60 which concerns on 7th Embodiment, and an apparatus provided with the same are demonstrated using FIGS. 26-28.

  FIG. 26 is a diagram for explaining the positional relationship between the valve body sliding contact surface 81 of the valve body 80 and the communication ports B, C, D, and E as seen from the direction of arrow G in FIG.

  FIG. 26 differs from FIG. 16 in that, in this embodiment, the communication ports B, C, D, and E are adjacent to each other at the apex of the regular hexagon 92 instead of the regular heptagon whose side is p. Is arranged.

  Note that the expression of a regular hexagon in the present embodiment is not limited to a configuration that is strictly defined geometrically. For example, a hexagonal shape similar to a regular hexagon is allowed as long as it satisfies the function as a valve. That is, it includes a dimensional error in the manufacturing process and a design allowable dimensional error.

  Since it is a regular hexagon, θp = 60 ° in this embodiment, and the communication ports B, C, D, and E are arranged in a range of 3 pitches (= 3θp = 180 °). If the valve body sliding contact surface 81 of the valve body 80 also covers a range of 3 pitches (= 3θp = 180 °), the valve body 80 can simultaneously cover the communication ports B, C, D, and E. That is, in this embodiment, as shown in FIG. 26, a plurality of communication pipe connection portions (communication ports B, C, D, E) are respectively arranged on the vertices of virtual regular hexagons on the valve seat 67b. The plurality of communication pipe connections are 4 ports, and the valve body 80 has means for simultaneously closing four vertices of regular hexagonal vertices, so that the valve body 80 simultaneously connects the communication ports B, C, D, and E. Can be covered.

  Further, in the present embodiment, the communication recess 82 is provided so as to communicate only within a range of 1 pitch (= θp), and is provided at a position where the communication ports B and C communicate. The communication port B and the communication port C communicate with each other by the communication recess 82, and the communication ports D and E are covered with the valve body sliding contact surface 81.

  The valve body 80 swings clockwise (plus direction) or counterclockwise (minus direction) from the angle 0 with the fully closed state shown in FIG.

  27, the valve body sliding contact surface 81 of the valve body 80 swings around the valve body shaft 71 from the angle 0 shown in FIG. 26 by (1) swinging one pitch (= −θp) in the minus direction. 1 state, (2) is the second state at an angle = 0, (3) is the third state where the pitch is swung by 1 pitch (= θp), and (4) is the swing of 2 pitches (= 2θp) in the plus direction. The fifth state is shown. The valve body 80 swings from the first state (1) to the fourth state (4) and reversibly swings from the fifth state (4) to the first state (1). is there.

FIG. 28 illustrates the refrigerant circuit when the refrigerant switching valve 60 is sequentially swung by one pitch (= θp) corresponding to the fourth state (4) from the first state in FIG. 27 (1). It is a schematic diagram to do.
In the first state of FIG. 28 (1), the communication port B is opened, and the communication port C and the communication port D are opened to the communication recess 82 and communicate with each other. The communication port E is closed. The refrigerant compressed by the compressor 51 and flowing from the inlet A of the refrigerant switching valve 60 through the condenser 52 flows out from the communication port B to the second refrigerant pipe 56 through the valve case 66. The refrigerant flows into the communication recess 82 from the communication port C via the dew condensation prevention pipe 17, flows out of the communication port D, passes through the fourth refrigerant pipe 57b, and passes through the second decompression means 54b, which is a thin tube, It expands to a low temperature and a low pressure, and flows into the cooler 7 through the junction portion 89. The low-temperature refrigerant that has flowed into the cooler 7 (cooler pipe 7d) exchanges heat with the ambient air and returns to the compressor 51.

In the second state of FIG. 28 (2), the communication tube 69b (communication port B) and the communication tube 69c (communication port C) open to the communication recess 82 and communicate with each other. The communication port D and the communication port E are closed. Both ends of the second refrigerant pipe 56 are communicated with each other through the communication recess 82 but do not communicate with the inside of the valve case 66, and the communication port B, the communication port C, the communication port D, and the communication port E are all closed. .
The compressor 51 stops and the refrigerant does not flow.

  In the third state of FIG. 28 (3), the communication port E is opened, and the communication port B, the communication port C, and the communication port D are closed. The refrigerant that has been compressed by the compressor 51 and has flowed from the inlet A of the refrigerant switching valve 60 through the condenser 52 flows out of the communication port E through the valve case 66 and is a narrow pipe through the third refrigerant pipe 57a. After passing through the first decompression means 54 a, it adiabatically expands to become a low temperature and low pressure and flows into the cooler 7. The low-temperature refrigerant that has flowed into the cooler 7 (cooler pipe 7d) exchanges heat with the ambient air and returns to the compressor 51.

  In the fourth state of FIG. 28 (4), the communication port D and the communication port E are opened, and the communication port B and the communication port C are closed. A part of the refrigerant compressed by the compressor 51 and flowing in from the inlet A of the refrigerant switching valve 60 through the condenser 52 flows out from the communication port D through the valve case 66, and the rest flows out from the communication port E. . The refrigerant flowing out of the communication port D passes through the fourth refrigerant pipe 57b and passes through the second decompression means 54b, which is a thin tube, and then adiabatically expands to become a low temperature and low pressure. The refrigerant flowing out from the communication port E passes through the third refrigerant pipe 57a, passes through the first decompression means 54a which is a thin tube, and then adiabatically expands to become a low temperature and low pressure. The refrigerant that has passed through the third refrigerant pipe 57a and the fourth refrigerant pipe 57b flows into the cooler 7 (cooler pipe 7d) via the junction portion 89. The low-temperature refrigerant that has flowed into the cooler 7 (cooler pipe 7 d) exchanges heat with ambient air in the cooler 7 and returns to the compressor 51.

<Action and effect>
As described with reference to FIG. 28, the refrigerant switching valve 60 according to the seventh embodiment switches the valve body 80 so that the inflow pipe 68 (inlet A) and the communication pipe 69b (communication opening B) communicate with each other. The communication pipe 69c (communication port C) and the communication pipe 69d (communication port D) communicate with each other and the communication pipe 69e (communication port E) is closed (see FIG. 28 (1)), and the communication pipe 69b. (Communication port B) and communication tube 69c (communication port C) communicate with each other, and communication tube 69d (communication port D) and communication tube 69e (communication port E) are closed (FIG. 28 (2) )), The inflow pipe 68 (inlet A) and the communication pipe 69e (communication port E) communicate with each other, and the communication pipe 69b (communication port B), the communication pipe 69c (communication port C), and the communication pipe 69d (communication). The third state in which the mouth D) is closed (see FIG. 28 (3)), and the inflow pipe 6 (Inlet A), communication tube 69d (communication port D) and communication tube 69e (communication port E) communicate with each other, and communication tube 69b (communication port B) and communication tube 69c (communication port C) are closed. The four states (see FIG. 28 (4)) can be switched. Thereby, the refrigerant switching valve 60 with improved refrigerant switching performance can be provided. In addition, the refrigerant can be switched in accordance with the actual use state of the device (refrigerator) provided with the refrigerant switching valve 60.

  Also in the seventh embodiment, the valve provided in the refrigerant path (refrigerant circuit) of the device (refrigerator) is only the refrigerant switching valve 60, and it is possible to configure a refrigeration cycle without the need to add other valves. It can be configured at low cost. In addition, since the valve switching control and arrangement are not complicated, the reliability of the device (refrigerator) including the refrigerant switching valve 60 can be improved.

  In the present embodiment, the cooler 7 is single as in the first embodiment, but it may have a configuration including a plurality of coolers as in the second embodiment, or the fifth embodiment. A plurality of coolers 7a and 7b may be arranged in the same manner as described above, and the condenser 52 is connected to the second refrigerant pipe 56 between the communication port B and the communication port C as in the sixth embodiment. Condensation prevention pipe 17 is provided, communication port D is connected to fourth refrigerant pipe 57b, communication port E is connected to third refrigerant pipe 57a, and the third refrigerant pipe is a first decompression means that is a narrow tube. The structure which does not provide 54a may be sufficient.

<< Eighth Embodiment >>
Next, the refrigerant | coolant switching valve 60 which concerns on 8th Embodiment, and an apparatus provided with this are demonstrated using FIG.

  FIG. 29A is a cross-sectional view taken along line HH in FIG. 10 of the refrigerant switching valve 60 according to the eighth embodiment, and illustrates the stator case 61 and the rotor 70 omitted. FIG. 29 (2) is a JJ sectional view of FIG. 29 (1). The eighth embodiment is different from the first embodiment in that it includes a first idler shaft 78a and a second idler shaft 78b, and further includes a first idler pinion 791a and a first idler large gear 791b. 1 idler gear 791, a second idler gear 792 having a second idler pinion 792a and a second idler large gear 792b, and the first idler gear 791 is rotated around the first idler shaft 78a. The second idler gear 792 is rotatably supported around the second idler shaft 78b, and the rotor pinion gear 75 and the first idler large gear 791b mesh with each other to reduce the speed. The idler pinion 791a and the second idler large gear 792b mesh with each other to decelerate and are provided on the second idler pinion 792a and the valve body 80. Is configured to decelerate Te valve gear 83 Togakamia' was.

  According to the eighth embodiment, the speed reduction ratio can be increased by performing the deceleration three times from the rotor pinion gear 75 to the valve body gear 83, and the drive torque of the valve body 80 is increased. It is possible to provide the refrigerant switching valve 60 in which the operation of the body 80 is reliable and highly reliable.

<< Ninth embodiment >>
Next, the refrigerant | coolant switching valve 60 which concerns on 9th Embodiment, and an apparatus provided with this are demonstrated using FIG.

FIG. 30A is a cross-sectional view of the refrigerant switching valve 60 according to the ninth embodiment, taken along line FF. The difference from the first embodiment is that
A first idler gear 791 having a first idler pinion 791a and a first idler large gear 791b; a second idler gear 792 having a second idler pinion 792a and a second idler large gear 792b; A third idler gear 793 having a third idler pinion 793a and a second idler large gear 793b, and a valve body 80, a second idler gear 792 and a rotor pinion 75 around the valve body shaft 71. The second idler gear 792 is mounted on the upper surface of the valve body 80, and the rotor pinion 75 is further mounted on the upper surface of the second idler gear 792. The first idler gear 791 and the third idler gear 793 are rotatably and coaxially supported, and the first idler gear 793 is provided on the upper surface of the first idler gear 793. The idler gear 791 is placed, the rotor pinion gear 75 and the first idler large gear 791b mesh with each other and decelerate, the first idler pinion 791a and the second idler large gear 792b mesh with and decelerate, and the second idler The pinion 792a and the third idler large gear 793b mesh with each other to decelerate, and the third idler pinion 793a and the valve body gear 83 provided on the valve body 80 mesh with each other to decelerate.

According to the ninth embodiment, the reduction ratio can be increased by performing the deceleration four times from the rotor pinion gear 75 to the valve body gear 83, and the drive torque of the valve body 80 is increased. It is possible to provide the refrigerant switching valve 60 in which the operation of the body 80 is reliable and highly reliable.
Further, the valve body 80, the second idler gear 792, and the rotor pinion 75 are disposed coaxially around the valve body shaft 71, and the first idler gear 791 and the third idler gear 793 are disposed coaxially around the idler shaft 78. Therefore, four-stage deceleration can be realized with only one idler shaft 78, so that a large reduction ratio can be obtained with a simple configuration.

≪Valve seat structure≫
Next, the valve seat structure of the refrigerant switching valve 60 according to the first to ninth embodiments will be further described with reference to FIG.

  FIG. 31 is an enlarged partial cross-sectional view showing a cross section of the second valve seat plate 67b, the valve body 80, and the communication pipe 69 of the refrigerant switching valve.

  As shown in FIG. 31, the portion of the outer periphery of the second valve seat plate 67 b that fits with the first valve seat plate 67 a is reduced in diameter and provided with a step, and is fitted with the first valve seat plate 67 a. Combined, brazed together and joined.

  A bottomed rotor shaft hole 72 that does not penetrate is formed in the center of the second valve seat plate 67b to support the valve body shaft 71. A communication hole 88 (communication pipe hole 87) to which the communication pipe 69 (69b, 69c, 69d, 69e) is connected is opened adjacent to the rotor shaft hole 72. Here, the communication hole 88 (communication tube hole 87) is opposite to the side on which the valve body 80 is disposed, and the communication hole 88 having a diameter d0 (for example, about φ1 mm) is opened on the side where the valve body 80 is disposed. The diameter (diameter d1) is enlarged (d1> d0) on the side, and the communication pipe 69 is fitted, brazed, and joined.

  The communication holes 88 to which these communication pipes 69 are connected are located close to the valve body shaft 71 in order to be disposed corresponding to the communication recesses 82 provided in the valve body sliding contact surface 81 of the valve body 80, as shown in FIG. It is necessary to provide at the position of the radius R (for example, about 3-4 mm) described above.

  On the other hand, the communication pipe 69 generally uses a copper pipe as a refrigerant pipe, and the communication pipe hole 87 into which the communication pipe 69 is fitted and brazed has a diameter d1 (for example, φ3 mm) larger than the inner diameter of the communication hole 88. A certain depth t2 (for example, about 2 mm) is required for positioning with respect to the second valve seat plate 67b when brazing.

  Here, the thickness of the second valve seat plate 67b is t0, the depth of the bottomed rotor shaft hole 72 is t1, the communication pipe 69b, the communication pipe 69c, the communication pipe 69d, and the communication pipe 69e. If t2 is satisfied, if the relationship of t0> (t1 + t2) is satisfied, the rotor shaft hole 72 and the communication tube hole 87 interfere with each other so that there is a hole and the communication tube 69 is brazed to the rotor shaft hole 72. It is possible to prevent the wax from flowing in, which is preferable. This can be realized, for example, as t0 = 5 mm and t1 = t2 = 2 mm.

  The valve body shaft 71 is fixed by being fitted into the bottomed rotor shaft hole 72, and is not brazed. Therefore, a solder is formed at the joint between the valve body shaft 71 and the second valve seat plate 67b. There is an effect that the surface tension does not protrude into a fillet shape at the corner, and the sticking of the valve body to the second valve seat plate 67b is not prevented by the protruding wax.

  Further, the valve case 66 and the outer periphery of the first valve seat plate 67a shown in FIGS. 11 to 14 to 29 to 30 are sealed by welding, for example, TIG welding (tungsten / inert gas welding) or laser welding. This is a configuration. On the other hand, although the valve body 80 and the idler gear 79 are made of a heat resistant resin such as PPS (polyphenylene sulfide resin), there is a limit to the temperature rise. In particular, the valve body sliding contact surface 81 of the valve body 80 may be unable to seal the refrigerant even if slight thermal deformation occurs. Therefore, a configuration that suppresses the temperature rise of the valve body 80 is desirable.

  In the configuration of the refrigerant switching valve 60 according to the present embodiment (first to ninth embodiments), the valve body 80 is disposed coaxially with the rotor 70, and the valve seat plate 67 (first valve seat plate 67a, second valve seat). The valve seat plate 67b) is disposed so as to swing around a valve body shaft 71 provided at the center of the valve seat plate 67b), and is disposed at a position farthest from the outer periphery to be welded.

  Thereby, since the valve body 80 is arranged at a position where the heat during welding is most difficult to be transmitted and the temperature is not easily raised, thermal deformation of the valve body 80 at the time of joining the valve case 66 and the first valve seat plate 67a is prevented. There is an effect of doing.

  In the (2) second state of the first embodiment shown in FIG. 18 and the (1) first state of the fourth embodiment shown in FIG. 23, the refrigerant flows through the communication recess 82.

  Here, as the cross-sectional dimension of the communication recess 82, the width w of the communication recess 82 shown in FIG. 31 is set to be approximately equal to or slightly larger than the diameter d0 of the communication hole 88, and the depth h of the communication recess 82 shown in FIG. Desirably, the dimensions are approximately equal to w.

  With such dimensions, when the refrigerant flows from the communication port C into the communication recess 82, it is possible to prevent the flow path from suddenly expanding and causing pressure loss, or conversely, the flow path is reduced. This is preferable because the flow rate is increased and the dynamic pressure is increased and the valve body 80 can be prevented from rising.

≪Operation during liquid sealing≫
Next, the case where a so-called liquid seal occurs in the refrigerant path (refrigerant circuit) will be described with reference to FIG. 32 (FIGS. 18 and 21 as appropriate). Here, the liquid seal is a refrigerant circuit in which both ends are closed, that is, the closed circuit is filled with a liquid refrigerant, and then the temperature rises and the refrigerant thermally expands so that a high pressure is generated in the refrigerant circuit piping and the valve body. It is a phenomenon that occurs.

  As described above, for example, the first state (see FIG. 18 (1)), the fourth state (see FIG. 18 (4)), and the fifth state (see FIG. 18 (5)) of the refrigerant switching valve 60 according to the first embodiment. Reference), the first state (see FIG. 19 (1)), the fourth state (see FIG. 19 (4)) and the fifth state (see FIG. 19 (5)) in the refrigerant switching valve 60 according to the second embodiment, In such a case, the second refrigerant pipe 56 (and the dew condensation prevention pipe 17) is a closed circuit in which both ends are sealed with the valve body 80.

  Incidentally, for example, in the fourth state (see FIG. 18 (4)) of the refrigerant switching valve 60 according to the first embodiment, the valve case 66 is in a state of communicating with the condenser 52 having a relatively large volume. Since the volume of the closed circuit (condenser 52, first refrigerant pipe 55, valve case 66) can be made larger than the volume of the total amount of refrigerant enclosed (when liquid), liquid sealing can be prevented. .

  In addition, the third refrigerant pipe 57a, the fourth refrigerant pipe 57b, and the cooler 7 that are closed by the communication port D of the refrigerant switching valve 60 and the compressor 51 also have an internal volume of the cooler 7 that functions as an evaporator. Since it is relatively large, liquid sealing can be prevented.

  FIG. 32 is an enlarged partial cross-sectional view showing a cross section of the second valve seat plate 67b, the valve body 80, and the communication pipe 69 of the refrigerant switching valve 60 when the pressure on the communication pipe 69 side increases.

  When all of the inside of the closed circuit is filled with liquid refrigerant and then the temperature rises and the refrigerant thermally expands, the pressure P2 of the thermally expanded refrigerant is directed from the communication pipe 69 to the valve body 80 (from the lower side to the upper side in the drawing). Join.

  11 to 14, the valve body 80 has the rotor 70 (the rotor driving unit 74 and the rotor pinion gear 75) mounted on the valve body 80, and the rotor 70 (the rotor driving unit 74 and the rotor pinion gear 75). ) And the urging force of the leaf spring 86 are preloaded against the second valve seat plate 67b. Further, a pressing force resulting from the refrigerant pressure P <b> 1 inside the valve case 66 is applied to the valve body 80.

  Here, the pressure P2 of the refrigerant becomes larger than P1, and receives a force exceeding the total weight of the rotor 70 (rotor driving unit 74, rotor pinion gear 75), the urging force of the leaf spring 86, and the pressing force caused by the pressure P1. Then, the leaf spring 86 contracts, and the valve body 80 and the rotor 70 (the rotor drive unit 74 and the rotor pinion gear 75) float from the second valve seat plate 67b along the valve body shaft 71, as shown in FIG. Move in the direction you want. As the valve body 80 rises, the refrigerant in the communication pipe 69 flows into the valve case 66 from the gap between the valve body 80 and the second valve seat plate 67b, and the pressure in the communication pipe 69 decreases. . When the pressure in the communication pipe 69 decreases, the valve body 80 is brought into close contact with the second valve seat plate 67b by the weight of the rotor 70 (the rotor drive unit 74 and the rotor pinion gear 75) and the urging force of the leaf spring 86. To do.

  Thus, since the valve body 80 can float from the 2nd valve seat plate 67b, it is effective in the ability to prevent the pressure in the communicating pipe 69 from rising abnormally.

  The effect of preventing the pressure in the communication pipe 69 from rising abnormally is not limited to the liquid-sealed state in which the communication pipe 69 is filled with the liquid refrigerant. The same effect can be obtained when the pressure is increased due to thermal expansion due to temperature rise.

  In the present invention, the communication port is located at the apex position of the regular polygon. However, from the first embodiment to the seventh embodiment, the opening / closing operation of the communication port accompanying the swinging of the valve body is the same. If there is, the angle (θp) of one pitch may be shifted from (2π / N) in the case of a regular polygon.

DESCRIPTION OF SYMBOLS 7 ... Cooler (evaporator), 17 ... Condensation prevention piping (refrigerant circulation part), 51 ... Compressor, 52 ... Condenser, 54 ... Decompression means, 55 ... First refrigerant piping, 56 ... Second refrigerant piping, 57a 3rd refrigerant piping, 57b 4th refrigerant piping, 60 ... Refrigerant switching valve, 61 ... Stator case, 62 ... Stator, 63 ... Connector case, 64 ... Connector pin, 65 ... Connector, 66 ... Valve case (case), 67 ... Valve seat plate (case), 67a ... First valve seat plate, 67b ... Second valve seat plate (valve seat), 68 ... Inflow pipe, 69 ... Communication pipe, 69b ... Communication pipe (first communication pipe) ), 69c ... Communication pipe (second communication pipe), 69d ... Communication pipe (third communication pipe), 69e ... Communication pipe (fourth communication pipe), 70 ... Rotor, 71 ... Valve body shaft, 72 ... Rotor shaft hole 73 ... Rotor bearing, 74 ... Rotor drive part, 75 ... Rotor pini , 76 ... rotor drive shaft tip, 77 ... rotor drive shaft hole, 78 ... idler shaft, 79 ... idler gear, 79a ... idler pinion, 79b ... idler large gear, 79c ... idler stopper, 80 ... valve body, 81 ... valve body Slide contact surface, 82 ... Communication recess, 83 ... Valve body gear, 84 ... Stopper, 85 ... Valve body shaft hole, 86 ... Leaf spring (biasing means), 87 ... Communication pipe hole, 88 ... Communication hole, 89 ... Merge 90, regular N-gon, 91 ... regular heptagon, 92 ... regular hexagon, A ... inflow port (inlet soot connection portion), B, C, D ... communication port (communication tube connection portion), ap1, ap2, ap3 ... apex

Claims (1)

A valve body that is swingably supported around the valve body axis;
A case containing the valve body;
A valve seat provided at one end of the case;
An inflow pipe connecting portion to which an inflow pipe is connected by opening one end inside the case;
One end is opened inside the case of the valve seat, and a plurality of communication pipes are connected, and a plurality of communication pipe connection parts are opened and closed by swinging the valve body,
In the refrigerant switching valve arranged at any one of the vertices of a virtual regular polygon in contact with a virtual arc centered on the valve body axis, the plurality of communication pipe connection portions ,
The plurality of communication pipe connection portions are connected to a first communication pipe, a second communication pipe, a third communication pipe, and a fourth communication pipe,
The valve body is
A first state in which the inflow pipe communicates with the first communication pipe, the second communication pipe communicates with the third communication pipe, and the fourth communication pipe is closed;
A second state in which the first communication pipe and the second communication pipe are communicated, and the third communication pipe and the fourth communication pipe are closed;
A third state in which the first communication pipe, the second communication pipe, the third communication pipe, and the fourth communication pipe are closed;
A fourth state in which the inflow pipe communicates with the fourth communication pipe, and the first communication pipe, the second communication pipe, and the third communication pipe are closed;
A fifth state in which the inflow pipe communicates with the third communication pipe and the fourth communication pipe, and the first communication pipe and the second communication pipe are closed;
The refrigerant switching valve characterized by switching.

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