JPH0330749B2 - - Google Patents

Description

[Detailed Description of the Invention] (a) Industrial Application Field This invention relates to a rotary solenoid valve for switching and shutting off flow paths for gases, fluids, etc. The present invention relates to a rotary solenoid valve that switches and blocks a fluid flow path by rotating the valve.

(B) Prior Art Conventionally, solenoid valves that open and close by moving a valve member up and down by the excitation force of an electromagnet, and sliding valve type solenoid valves that utilize a pressure difference are well known.

Therefore, a four-way switching valve will be described as a conventional example. Conventional four-way switching valves basically switch the direction of refrigerant flow in the refrigeration cycle from the indoor heat exchanger to the outdoor heat exchanger, or from the outdoor heat exchanger to the indoor heat exchanger. It is used to heat or cool a room. As shown in FIGS. 5 and 6, this four-way switching valve has a discharge pipe 3 of a compressor 2 attached to the upper surface of a body wall surface of a sealed horizontal cylindrical valve body 1.
The high-pressure gas connecting pipe 4 connected to the valve body 1 is opened, and the indoor heat exchanger is placed on both sides of the low-pressure refrigerant connecting pipe 6 connected to the suction pipe 5 of the compressor 2 in the center on the lower surface of the body wall of the valve body 1. A connecting pipe 8 connected to the valve body 1 and a connecting pipe 10 connected to the outdoor heat exchanger 9 are opened side by side, and the open ends of the connecting pipes 6, 8, and 10 are connected to the valve body 1.
It is fixed to the valve body 1 with a seat 11 flush with the axial direction of the cylinder. Also, the seat 1 is provided inside the valve body 1.
A U-shaped slide valve 12 that slides on the opening surface of the tube in the axial direction of the cylinder and selectively connects the connecting pipes 6 and 8 or 6 and 10 is disposed on both sides of the slide valve 12. The piston bodies 13 and 14 are connected to each other by a connecting plate 15. Furthermore, the space 1 between the member 16 that seals one end of the valve body 1 and the piston body 13
7 and the space 19 between the member 18 and the piston body 14 are provided with capillary tubes 20, 21 and a low-pressure gas capillary tube 22 for selectively introducing high-pressure gas or low-pressure gas. These three capillary tubes are communicated with small needle valve spaces 23 and 24 and an intermediate space therebetween, as shown in FIG.

Now, the high pressure gas discharged from the compressor is connected to the connecting pipe 4.
and flows into the spaces 17, 19 through small holes provided in the piston bodies 13 and 14. At this time, when the coil 25 is not energized, the needle valve 26 seals the small space 24 with a spring, and the opposing needle valve 28 opens via the pin 27, and the small space 23 is released. Therefore, the pressures in the space 17 and the small space 24 are high, and the pressure in the space 19 is low, and the piston bodies 13 and 14 move toward the space 19 due to this pressure difference. At this time, the sliding valve 12
are also moved in the same direction by the connecting plate 15, so that the flow paths of the connecting pipes 6 and 8 communicate with each other. In this state, the circuit is in a cooling state. When the coil 25 is energized, the excitation force moves the needle valves 26 and 28 in the opposite direction to the above, and the piston bodies 13 and 14 move into the space 17.
direction and connect the connecting pipes 6, 10 by the sliding valve 12.
The flow paths are connected and the circuit enters a heating state. however,
At this time, electricity is continuously applied during operation.

(c) Problems to be Solved by the Invention The above is the operating principle of the conventional four-way switching solenoid valve, and as shown in Figure 5, it has a very complex and elaborate structure, and the number of parts is about 10 to 10. It had become expensive, costing as many as 70 items.

In addition, when a heat pump type air conditioner stops the compressor, the pressure maintained in each part of the cycle during operation is balanced and lost, and it takes energy and time to restore the original pressure state when restarting. required.

Therefore, as a means to minimize losses, conventionally, solenoid valves are installed in each part of the refrigeration cycle, such as the compressor and heat exchanger, to maintain the operating state.
The flow path must be blocked, making the process extremely expensive and complicated.

This invention was made in view of the above circumstances,
The purpose is to make it possible to easily minimize energy loss when the present invention is used in a heat pump type harmonizer, and to make the solenoid valve itself simple and inexpensive.

(d) Means for Solving the Problems The present invention is a rotary solenoid valve, which is a box made of a cylindrical non-electromagnetic body with one connecting passageway opened at one end and a plurality of connecting passageways opened at the other end. a rotary valve of a predetermined thickness that is housed in the box body so as to be slidable and rotatable in the circumferential direction thereof, and a stopper provided in the box body that restricts the rotation angle of the rotary valve to a predetermined angle. and,
A permanent magnet is installed at a predetermined position on the outer periphery of one side of the rotary valve so that it moves along with the rotary valve while touching the inner wall of the box body when the rotary valve rotates, and a permanent magnet is installed in the box body so as to surround the outer peripheral wall of the rotary valve. An electromagnet consisting of an attached hollow ring body and a box body configured to be able to change the polarity when energized to the electromagnet and approximately correspond to the two stopping positions of the permanent magnet when the rotary valve is rotated by a predetermined angle. two magnetic pole generators disposed within the hollow part of the electromagnet so that the angle from the center of the rotary valve that is in contact with the outer circumferential wall and formed by these contact positions is larger than the rotation angle of the rotary valve; When the rotary valve is stopped and the permanent magnet is located on one side of the magnetic pole generation part (position A), the connection flow path 37 on one end of the box and the plurality of connection flow paths on the other end of the box are connected. one connecting channel 4 of
0, and when the rotary valve rotates and the permanent magnet is located on the other magnetic pole generating section side (position B), the connection flow path 37 and the connection flow path 40 on the other end side of the box body are connected.
When the rotary valve is stopped and the permanent magnet is located between the two magnetic pole generating parts (C position), all the connection channels on the other end of the box and the A through hole is provided in the rotary valve to make the connection flow path 37 non-communicating, and when the permanent magnet is in the A position, the two connection flow paths other than the connection flow path 40 on the other end of the box are brought into communication. , when the permanent magnet is in the B position, two connecting channels other than the connecting channel 38 on the other end of the box are communicated, and when the permanent magnet is in the C position, all the connecting channels on the other end of the box are connected. A recessed portion for making the passage into a non-communicating state is provided on the other end side of the box body of the rotary valve.

(e) Effect This invention applies electricity to a solenoid valve to set the polarity of the magnetic pole generating part on the permanent magnet side of the two magnetic pole generating parts to a polarity that repels the permanent magnet, and the polarity of the other magnetic pole generating part to be attracted to the permanent magnet. When the polarity is set, the rotary valve rotates at a predetermined angle to connect the connecting flow path on one end of the box and one of the plurality of connecting flow paths on the other end of the box. At the same time, the remaining two of the plurality of connection channels on the other end of the box are communicated through the recess of the rotary valve, and the solenoid valve is energized to connect the two magnetic pole generators. If the polarity of is set to be the polarity that repels the permanent magnet, the rotary valve will stop so that the permanent magnet is located between the two magnetic pole generating parts, and the connecting flow path on one end of the box and all the connections on the other end of the box will be closed. In addition to blocking communication of the connecting channel, communication of all the connecting channels on the other end side of the box body is also blocked.

(f) Examples This invention will be described in detail below based on examples shown in the figures. In this embodiment, a rotary four-way solenoid valve will be described.

1, 2, and 4, the rotary four-way solenoid valve includes a box 29, a rotary valve 30, two stoppers 31, 32, a permanent magnet 33, an electromagnet 34, two magnetic pole generators 35, It is mainly composed of 36.

The box body 29 is made of a short cylindrical non-magnetic material, and has one connection passage 37 opened at one end and three connection passages 38 to 40 opened at the other end. The opening widths of these connection channels 37 to 40 are approximately the same. In addition,
These connecting channels are hereinafter referred to as connecting pipes.

The rotary valve 30 is made of a disc with a predetermined thickness, and
It is rotatably housed in the circumferential direction within the outer circumferential edge thereof, and two notches 41 and 42 formed by cutting out the outer circumferential edge with a width of several mm are provided on the outer circumferential edge thereof. These notches 41 and 42 are the rotary valve 30.
are located symmetrically with respect to the center of the rotary valve 30, and their lengths correspond to approximately 1/4 of the circumferential length of the rotary valve 30, respectively.
The rotary valve 30 also has an elongated through hole that is approximately the same length as the notches 41 and 42 and is located closer to the center of the rotary valve 30 than one of the notches 41 and along the outer periphery of the rotary valve 30. 43 is provided so that the connecting pipe 37 and the connecting pipes 38 and 40 can communicate with each other. The width of this through hole 43 is approximately equal to the opening width of each of the connecting pipes 37 to 40. Furthermore, on the surface of the three connecting pipes 38 to 40 of the rotary valve 30, the through hole 4 is
3 and a recess 44 having the same shape as the through hole 43.
is recessed so that the connecting pipe 39 and the connecting pipes 38 and 40 can communicate with each other.

The stoppers 31 and 32 are connected to the cutout portions 41 and 42.
It is provided on the inner wall of the box body 29 so as to protrude inward, and restricts the rotation angle of the rotary valve 30 to a predetermined angle (α).

A permanent magnet 33 is placed on the outer peripheral edge of one side of the rotary valve 30 in the center between the ends of the two notches 41 and 42, and is in contact with the inner wall of the box body 29 together with the rotary valve 30 when the rotary valve 30 is rotated. It is designed so that it can be moved while

The electromagnet 34 consists of a hollow ring body attached to the box body 29 so as to surround its outer peripheral wall.

The magnetic pole generators 35 and 36 are configured to be able to change polarity when the electromagnet 34 is energized, and when the rotary valve 30 is rotated by a predetermined angle, the permanent magnet 33
The angle from the center of the rotary valve 30 that is in contact with the outer circumferential wall of the box body 29 that substantially corresponds to the two stop positions, and that is formed by these contact positions is larger than the rotation angle of the rotary valve 30. (β) is disposed within the hollow portion of the electromagnet 34.

Next, the operation when the above electromagnetic valve is used in a heat pump type air conditioner will be explained.

In FIG. 3, the high pressure gas discharged from the compressor 45 passes through the connecting pipe 37 and the rotary valve 3 in the box body 29.
0 flows into the space 46 below, and the through hole 43 of the rotary valve 30
It returns to the box body 29 through the outdoor heat exchanger 47 - capillary tube 48 - indoor heat exchanger 49 - connection pipe 38, passes through the recess 44 of the rotary valve 30, and is sucked into the compressor 45 from the connection pipe 39. . At this time, the rotary valve 30 is pushed upward in the figure by the high pressure gas from the connecting pipe 37. The circuit (cycle) in this state is cooling, and the arrangement inside the box 29 is as shown in FIG. 4a. Note that the magnetic pole generators 35 and 36 of the electromagnet 34 shown in FIG.
(Of course, it is also possible to apply a small current, etc.).

Next, switching will be explained with reference to FIG.

First, the non-energized electromagnet shown in FIG. magnet 33
The polarity is opposite to that of the permanent magnet 33 so as to create a repulsive state. Then, the polarity of the magnetic pole of the other magnetic pole generating section 36 is set to be a polarity that is attracted to the permanent magnet 33. When the rotary valve 30 is rotated by the torque generated by the repulsion and suction, the connecting pipes 37 and 38 and the connecting pipes 38 and 40 communicate with each other. The circuit in this state is heating. In addition, the symbols D, E, S, and C shown in FIGS.
The opening ends of 0 are shown respectively. Fig. 4b shows the state of heating, and the discharged high-pressure gas flows from the connecting pipe 37 to the space 46, through hole 43 → connecting pipe 38 → indoor heat exchanger (condenser) 47 → capillary tube 48 → outdoor heat It flows from the exchanger (evaporator) 49 to the connecting pipe 40, passes through the recess 44 and into the connecting pipe 39, and is sucked into the compressor 45.

Apart from the basic operation described above, as shown in FIG. It is held at an intermediate position of angle α. In this state, the connecting pipes 38 and 40 are shut off by the rotary valve 30, and the gas discharged from the connecting pipe 37 is also shut off by the rotary valve 30.

Therefore, the pressure and refrigerant distribution during steady operation of the compressor 45 can be controlled without using any expensive solenoid valves.
Since it is easily maintained even after the compressor 45 is stopped, energy loss can be kept to a minimum. Therefore, the operating efficiency of the heat pump type air conditioner can be improved. In addition, the rotary solenoid valve according to the present invention has about 10 parts as shown in the figure, making it possible to provide a rotary solenoid valve that is inexpensive and has high added value. Furthermore, by installing the rotary solenoid valve of the present invention, it is possible to provide a heat pump type air conditioner that is inexpensive and has high operating efficiency.

(G) Effects of the Invention According to the present invention, when the present invention is used in a heat pump type air conditioner, energy loss can be easily minimized. Therefore, the operating efficiency of the air conditioner can be improved. Furthermore, the number of parts can be reduced compared to the conventional one. Therefore, the structure becomes simple,
The solenoid valve itself can be made inexpensive.

[Brief explanation of the drawing]

Figures 1a and b are a plan view and a front view showing an embodiment of the present invention, respectively, and Figure 2 is a-a of Figure 1.
A cross-sectional view, FIG. 3 is a configuration explanatory diagram showing an example of applying the present invention to a heat pump type air conditioner, and FIG. 4a,
b and c are sectional views taken along the line bb in FIG. 2, where a shows the state during cooling, b shows the state during heating, and c shows the state when discharge gas is cut off. FIG. 5 is a diagram corresponding to FIG. 3 of a conventional example, and FIG. 6 is an explanatory diagram of the configuration of a four-way switching solenoid valve of a conventional example. 29...Box body, 30...Rotary valve, 31, 32...
...Stopper, 33...Permanent magnet, 34...Electromagnet, 35, 36...Magnetic pole generator, 37-40...
Connection pipe (connection flow path), 43...through hole, 44...recess.

Claims (1)

[Claims] 1 A box body made of a cylindrical non-electromagnetic material with one connection channel opened at one end and a plurality of connection channels opened at the other end, and a box body that is housed inside the box body so as to be slidable and rotatable in the circumferential direction. a rotary valve having a predetermined thickness; a stopper provided inside the box body to restrict the rotation angle of the rotary valve to a predetermined angle; A permanent magnet is installed to move along with the rotary valve while touching the inner wall of the box, and an electromagnet is made of a hollow ring attached to the box so as to surround the outer wall of the box.When this electromagnet is energized, A rotary valve that is configured to be convertible in polarity and is in contact with the outer circumferential wall of the box body and is formed by these contact positions that approximately correspond to two stopping positions of the permanent magnet when the rotary valve is rotated by a predetermined angle. and two magnetic pole generating parts arranged in the hollow part of the electromagnet so that the angle from the center of the rotary valve is larger than the rotation angle of the rotary valve,
When the rotary valve is stopped and the permanent magnet is located on one side of the magnetic pole generating section (position A), the connection flow path 37 on one end of the box body and one of the plurality of connection flow paths on the other end side of the box body. When the rotary valve is rotated and the permanent magnet is located on the other magnetic pole generating section side (position B), the connection flow path 37 and the connection flow on the other end side of the box body are connected to each other. communicating with a connecting channel 38 other than the channel 40;
When the rotary valve is stopped and the permanent magnet is located between the two magnetic pole generating parts (C position), all the connection channels on the other end side of the box and the connection channel 37 are brought into a non-communicating state. A through hole is provided in the rotary valve, and when the permanent magnet is in the A position, the connection flow path 40 on the other end of the box body is
The other two connecting channels are connected, and the permanent magnet is connected to B.
When the permanent magnet is in the C position, the two connecting channels other than the connecting channel 38 on the other end of the box are in communication, and when the permanent magnet is in the C position, all the connecting channels on the other end of the box are in a non-communicating state. A rotary solenoid valve that has a recess on the other end of the rotary valve box.