JP5500181B2 - Air conditioner ceiling-mounted indoor unit - Google Patents

Description

  The present invention relates to a ceiling-mounted indoor unit of an air conditioner, and in particular, to an air-conditioning apparatus in which at least four horizontal blades capable of independently changing the vertical wind direction angle are provided at the outlet. It relates to a type indoor unit.

  Conventionally, as an indoor unit of an air conditioner, there is a type installed on a ceiling in an air conditioning room. As such an indoor unit, there is one disclosed in Patent Document 1 (Japanese Unexamined Patent Application Publication No. 2009-103417). The indoor unit of the air conditioner according to Patent Document 1 is provided with one suction port and four outlets positioned so as to surround the suction port, and each outlet has a rotatable horizontal blade. Is provided. This indoor unit has a so-called dual mode in which two horizontal blades at opposite outlets and two horizontal blades at other opposite outlets swing in opposite directions.

  However, in the dual mode, the adjacent horizontal blades rotate in opposite directions. That is, while an arbitrary horizontal blade is rotating upward, the horizontal blade located next to the horizontal blade is rotating downward. Therefore, in the dual mode, it is difficult to send the air blown from the outlet to a place away from the indoor unit, and it is difficult to say that the air in the air-conditioned room is effectively stirred.

  Therefore, an object of the present invention is to improve the reachability of air to a distant place and improve the agitation of air in an air-conditioned room.

A ceiling-mounted indoor unit of an air conditioner according to a first aspect of the present invention is a ceiling-mounted indoor unit of an air conditioner provided on a ceiling of an air conditioning room, and includes a casing, at least four horizontal blades, a control A part. A blowout port is formed on the lower surface of the casing along the peripheral edge of the lower surface. At least four horizontal blades are rotatably provided at the air outlet, and can independently change the vertical wind direction angle. The control unit controls each horizontal blade such that at least two horizontal blades (hereinafter referred to as first horizontal blades) adjacent to each other among the horizontal blades swing while taking the same posture in synchronization. Furthermore, a control part controls each horizontal blade | wing so that the combination of a 1st horizontal blade | wing may shift in order along the peripheral part of a lower surface. The lower surface of the casing has a substantially quadrangular shape in plan view. Four horizontal blades are provided corresponding to each side of the lower surface. Then, the control unit sequentially shifts the combination of the first horizontal blades one by one.

  According to this ceiling-mounted indoor unit, at least two horizontal blades adjacent to each other, that is, the first horizontal blade, swing while taking the same posture synchronously. Therefore, in this ceiling-mounted indoor unit, the air blown from the indoor unit outlet to the air-conditioned room can be sent farther than when the adjacent horizontal blades individually swing differently. A high stirring effect can be obtained. Furthermore, the combination of the first horizontal blades is sequentially shifted along the peripheral edge of the lower surface. Therefore, a higher agitation effect can be obtained as compared with the case where the combination of the first horizontal blades that swing in synchronization is fixed.

Further, according to this ceiling-mounted indoor unit, the combinations of the first horizontal blades are shifted one by one in order. For this reason, the air in the air-conditioned room is more easily stirred. And since the air in an air-conditioned room can be stirred effectively, more conditioned air can be sent to a distant place.

The ceiling-mounted indoor unit of the air conditioner according to the second aspect of the present invention is the ceiling-mounted indoor unit of the air conditioner according to the first aspect, wherein the control unit is configured such that the first horizontal blade is in the vertical direction with respect to the outlet. Every time a predetermined number of reciprocations are rotated, the combination of the first horizontal blades is shifted.

  According to this ceiling-mounted indoor unit, the timing at which the combination of the first horizontal blades is shifted is matched with the reciprocating rotation of the first horizontal blade. Therefore, by setting the number of reciprocating rotations, it is possible to prioritize the ability to reach air far away or prioritize the agitation of the air in the air-conditioned room.

The ceiling-mounted indoor unit of the air conditioner according to the third aspect of the present invention is the ceiling-mounted indoor unit of the air conditioner according to the first aspect, wherein the controller swings the first horizontal blade for a first predetermined time. Each time, the combination of the first horizontal blades is shifted.

  According to this ceiling-mounted indoor unit, the combination of the first horizontal blades is shifted after the first horizontal blades swing for the first predetermined time. Therefore, by setting the first predetermined time, it is possible to prioritize the air reachability to a distant place or give priority to the agitation of the air in the air-conditioned room.

The ceiling-mounted indoor unit for an air-conditioning apparatus according to a fourth aspect of the present invention is the ceiling-mounted indoor unit for an air-conditioning apparatus according to any one of the first to third aspects. While swinging while taking the same posture synchronously, the second horizontal blade is fixed at a predetermined angle. The second horizontal blade refers to the remaining blades other than the first horizontal blade among at least four horizontal blades.

  According to this ceiling-mounted indoor unit, the remaining blades other than the first horizontal blades, that is, the second horizontal blades are fixed at a predetermined angle while the first horizontal blades are swinging. Therefore, the air in the air-conditioned room is agitated by the swinging first horizontal blade, and the air in the air-conditioned room is sent, for example, far away by the second horizontal blade.

The ceiling-mounted indoor unit for an air conditioner according to a fifth aspect of the present invention is the ceiling-mounted indoor unit for an air-conditioning apparatus according to any one of the first to fourth aspects, wherein the first horizontal blade is an outlet. Reciprocate in the vertical direction. And a control part stops the operation | movement of the horizontal blade | wing temporarily, when the rotation direction of a 1st horizontal blade | wing changes.

  In this ceiling-mounted indoor unit, a so-called pause period is provided in which the operation of the first horizontal blade temporarily stops when the rotation direction of the first horizontal blade changes. Thereby, in the middle of stirring the air in the air-conditioned room, the air blown out from the outlet is reliably blown out, for example, in the horizontal direction or the vertical direction.

The ceiling-mounted indoor unit for an air conditioner according to a sixth aspect of the present invention is the ceiling-mounted indoor unit for an air-conditioning apparatus according to any one of the first to fifth aspects. (2) The horizontal blades are controlled so that the first horizontal blades swing while taking the same posture synchronously for a predetermined time, and the combination of the first horizontal blades sequentially shifts along the peripheral edge of the lower surface. And a control part inclines a 1st horizontal blade | wing for a predetermined angle after 2nd predetermined time progress from a driving | operation start.

  In this ceiling-mounted indoor unit, when the second predetermined time has elapsed from the start of operation, the operation of the first horizontal blades swinging in synchronization and the combination of the first horizontal blades being sequentially shifted ends. Then, the first horizontal blade is inclined at a predetermined angle. As a result, air having a desired temperature can be supplied into the air-conditioned room where the air has been sufficiently agitated, so that discomfort felt by the user due to the draft can be suppressed, and the air-conditioned room can be made comfortable.

The ceiling-mounted indoor unit for an air conditioner according to a seventh aspect of the present invention is the ceiling-mounted indoor unit for an air conditioner according to any one of the first to sixth aspects, wherein the outlet is divided by each horizontal blade. And has corner outlets corresponding to the corners of the lower surface.

  In this ceiling-mounted indoor unit, the first horizontal blades that are adjacent to each other with an arbitrary corner blowout port swing while taking the same posture synchronously. Further, the combination of the first horizontal blades is sequentially shifted. Therefore, the air blown out from the corner blowout port takes in part of the air in the air-conditioning chamber together with the air blown out from the blowout port portion opened and closed by the first horizontal blade adjacent to the corner portion. It is surely sent far away by the first horizontal blade. Therefore, as compared with the case where the individual horizontal blades are individually swung without being synchronized, the air in the air-conditioned room can be agitated by more air that is blown out, and more air-conditioned air can be sent far away. .

The ceiling-mounted indoor unit of the air conditioner according to the eighth aspect of the present invention is the ceiling-mounted indoor unit of the air conditioner according to the seventh aspect , wherein the first horizontal blade is composed of three horizontal blades adjacent to each other. Has been.

  Thereby, while being able to stir the air in an air-conditioned room effectively, more air-conditioned air can be sent to a distant place.

  As described above, according to the present invention, the following effects can be obtained.

According to the ceiling-mounted indoor unit of the air conditioner according to the first aspect of the present invention, air blown from the air outlet of the indoor unit to the air conditioning room can be sent further and a higher stirring effect can be obtained. Can do. Further, the air in the air-conditioned room is more easily stirred. Furthermore, since the air in the air-conditioned room can be effectively stirred, more air-conditioned air can be sent far away.

According to the ceiling-mounted indoor unit of the air conditioner according to the second aspect of the present invention, by setting the number of times of reciprocating rotation, priority is given to the reachability of the air to a distant place, Can be prioritized.

According to the ceiling-mounted indoor unit of the air conditioner according to the third aspect of the present invention, setting the first predetermined time gives priority to air reachability to a distant place or gives priority to air agitation in the air-conditioned room. You can make it.

According to the ceiling-mounted indoor unit of the air conditioner according to the fourth aspect of the present invention, the air in the air-conditioned room is stirred by the swinging first horizontal blade, and the air in the air-conditioned room is For example, it is sent far away.

According to the ceiling-mounted indoor unit of the air conditioner according to the fifth aspect of the present invention, the air blown out from the air outlet is reliably, for example, in the horizontal direction or the vertical direction while stirring the air in the air conditioning room. Be blown out.

According to the ceiling-mounted indoor unit of the air conditioner according to the sixth aspect of the present invention, it is possible to suppress discomfort felt by the user due to the draft, and to make the air-conditioned room comfortable.

According to the ceiling-mounted indoor unit of the air conditioner according to the seventh aspect of the present invention, the air in the air-conditioned room can be agitated by more air that is blown out, and more air-conditioned air can be sent far away.

According to the ceiling-mounted indoor unit of the air conditioner according to the eighth aspect of the present invention, the air in the air-conditioned room can be effectively stirred and more air-conditioned air can be sent far away.

It is a schematic block diagram of the air conditioning apparatus by which the ceiling installation type indoor unit concerning one Embodiment of this invention was employ | adopted. 1 is an external perspective view of a ceiling-mounted indoor unit according to an embodiment of the present invention. FIG. 5 is a schematic side cross-sectional view of a ceiling-mounted indoor unit according to an embodiment of the present invention, and is a cross-sectional view taken along the line I-O-I of FIG. It is a schematic plan view which shows the state which removed the top plate of the ceiling installation type indoor unit concerning one Embodiment of this invention. It is the bottom view of the decorative panel of the ceiling installation type indoor unit concerning one Embodiment of this invention, ie, the top view which looked at the decorative panel from the air conditioned room. It is a schematic diagram which shows the detection range of the airflow of the conditioned air which blows off from the blower outlet of the ceiling installation type indoor unit concerning one Embodiment of this invention, and a human detection sensor. It is a schematic diagram which shows the structure of the human detection sensor provided in the ceiling installation type indoor unit concerning one Embodiment of this invention. It is a schematic diagram which shows the detection range of the human detection sensor in the side view of the ceiling-mounted indoor unit concerning one Embodiment of this invention. It is a block diagram which shows typically the indoor control part concerning one Embodiment of this invention, and the various apparatuses in the ceiling installation type indoor unit connected to this control part. It is a figure which shows the wind direction change range of the horizontal blade | wing of the ceiling-mounted indoor unit concerning one Embodiment of this invention. It is a timing chart for demonstrating operation | movement of each horizontal blade | wing of the ceiling-mounted indoor unit concerning one Embodiment of this invention. It is a figure which shows a mode that the combination of a 1st horizontal blade | wing shifts in order. It is an example of a screen displayed on the display unit of the remote controller when setting various modes. It is a flowchart which shows the flow of the whole operation | movement of the air conditioning apparatus by which the ceiling installation type indoor unit concerning one Embodiment of this invention was employ | adopted. It is a flowchart which shows the flow of the whole operation | movement of the air conditioning apparatus by which the ceiling installation type indoor unit concerning one Embodiment of this invention was employ | adopted. It is a figure which shows a mode that the combination of the 1st horizontal blade | wing concerning other embodiment (A) shifts in order. It is a timing chart for demonstrating operation | movement of each horizontal blade | wing concerning other embodiment (D). It is a figure which shows a mode that the combination of the 1st horizontal blade | wing concerning other embodiment (D) shifts in order.

  An embodiment of a ceiling-mounted indoor unit according to the present invention will be described with reference to the drawings.

<Configuration>
-Overall-
FIG. 1 is a schematic configuration diagram of an air conditioner 1 in which a ceiling-mounted indoor unit 4 according to an embodiment of the present invention is employed. The air conditioner 1 is a split-type air conditioner, and mainly includes an outdoor unit 2, a ceiling-mounted indoor unit 4, a liquid refrigerant communication pipe 5 that connects the outdoor unit 2 and the ceiling-mounted indoor unit 4, and The gas refrigerant communication pipe 6 is included, and a vapor compression refrigerant circuit 10 is configured. Such an air conditioner 1 can perform a cooling operation and a heating operation.

-Outdoor unit-
The outdoor unit 2 is installed outdoors, and mainly includes a compressor 21, a four-way switching valve 22, an outdoor heat exchanger 23, an expansion valve 24, a liquid side shut-off valve 25, and a gas side shut-off valve. 26.

  The compressor 21 is a mechanism that sucks low-pressure gas refrigerant and discharges it after compressing it into a high-pressure gas refrigerant. Here, as the compressor 21, a volumetric compression element (not shown) such as a rotary type or a scroll type accommodated in a casing (not shown) is used by a compressor motor 21a also accommodated in the casing. A driven hermetic compressor is employed. The compressor motor 21a can change the rotation speed (namely, operating frequency) with an inverter apparatus (not shown), and the capacity | capacitance control of the compressor 21 is attained by this.

  The four-way switching valve 22 is a valve for switching the direction of the refrigerant flow when switching between the cooling operation and the heating operation. The four-way switching valve 22 can connect the discharge side of the compressor 21 and the gas side of the outdoor heat exchanger 23 and can connect the gas side closing valve 26 and the suction side of the compressor 21 during cooling operation. (Refer to the solid line of the four-way switching valve 22 in FIG. 1). In addition, the four-way switching valve 22 connects the discharge side of the compressor 21 and the gas side shut-off valve 26 and connects the gas side of the outdoor heat exchanger 23 and the suction side of the compressor 21 during heating operation. (Refer to the broken line of the four-way switching valve 22 in FIG. 1).

  The outdoor heat exchanger 23 is a heat exchanger that functions as a refrigerant radiator during cooling operation and functions as a refrigerant evaporator during heating operation. The outdoor heat exchanger 23 has a liquid side connected to the expansion valve 24 and a gas side connected to the four-way switching valve 22.

  During the cooling operation, the expansion valve 24 reduces the pressure of the high-pressure liquid refrigerant radiated in the outdoor heat exchanger 23 before sending it to the indoor heat exchanger 42 (described later). The expansion valve 24 is an electric expansion valve capable of reducing the pressure before sending the high-pressure liquid refrigerant radiated in the indoor heat exchanger 42 to the outdoor heat exchanger 23 during the heating operation.

  The liquid side shutoff valve 25 and the gas side shutoff valve 26 are valves provided at connection ports with external devices and pipes (specifically, the liquid refrigerant communication pipe 5 and the gas refrigerant communication pipe 6). The liquid side closing valve 25 is connected to the expansion valve 24. The gas side closing valve 26 is connected to the four-way switching valve 22.

  The outdoor unit 2 is provided with an outdoor fan 27 for sucking outdoor air into the unit 2 and supplying the outdoor heat to the outdoor heat exchanger 23 and then discharging the air outside the unit 2. It has been. That is, the outdoor heat exchanger 23 is a heat exchanger that radiates and evaporates the refrigerant using outdoor air as a cooling source or a heating source. Here, as the outdoor fan 27, a propeller fan driven by an outdoor fan motor 27a is employed. The outdoor fan motor 27a can vary the rotation speed (that is, the operating frequency) by an inverter device (not shown), thereby enabling the air volume control of the outdoor fan 27.

  Although not shown, the outdoor unit 2 is provided with a sensor for detecting suction pressure and discharge pressure, a sensor for detecting the temperature of the refrigerant on the liquid side of the outdoor heat exchanger 23, and a sensor for detecting the outside air temperature. It has been.

  Furthermore, the outdoor unit 2 has an outdoor control unit 39 that controls the operation of each device constituting the outdoor unit 2. The outdoor control unit 39 includes a microcomputer including a CPU and a memory, and can exchange control signals and the like with an indoor control unit 67 (described later) of the ceiling-mounted indoor unit 4. .

−Liquid refrigerant connection tube−
The liquid refrigerant communication pipe 5 is a refrigerant pipe connected to the liquid side closing valve 25. The liquid refrigerant communication tube 5 is a refrigerant tube capable of leading the refrigerant out of the outdoor unit 2 from the outlet of the outdoor heat exchanger 23 that functions as a refrigerant radiator during cooling operation. The liquid refrigerant communication pipe 5 is also a refrigerant pipe capable of introducing a refrigerant from the outside of the outdoor unit 2 to the inlet of the outdoor heat exchanger 23 that functions as a refrigerant evaporator during heating operation.

-Gas refrigerant communication tube-
The gas refrigerant communication pipe 6 is a refrigerant pipe connected to the gas side closing valve 26. The gas refrigerant communication tube 6 is a refrigerant tube capable of introducing a refrigerant from outside the outdoor unit 2 to the suction of the compressor 21 during the cooling operation. The gas refrigerant communication pipe 6 is also a refrigerant pipe capable of leading the refrigerant out of the outdoor unit 2 from the discharge of the compressor 21 during heating operation.

−Ceiling-mounted indoor unit−
Here, the ceiling-mounted indoor unit 4 employs a type of ceiling-mounted air conditioner called a ceiling-embedded type. As shown in FIGS. 2 to 5 and 9, the ceiling-mounted indoor unit 4 includes a casing 51 that houses various components therein, four horizontal blades 71a, 71b, 71c, 71d, various sensors 61, 62, 63, an indoor control section 67 (corresponding to the control section), and a remote control receiving section 69.

-Casing-
The casing 51 includes a casing body 51 a and a decorative panel 52 that is disposed on the lower side of the casing body 51 a and corresponds to the lower surface of the casing 51. As shown in FIG. 3, the casing main body 51 a is disposed by being inserted into an opening formed in the ceiling U of the air conditioning room. And the decorative panel 52 is arrange | positioned so that it may fit in opening of the ceiling U. FIG. Here, FIG. 2 is an external perspective view of the ceiling-mounted indoor unit 4. 3 is a schematic side cross-sectional view of the ceiling-mounted indoor unit 4 and is a cross-sectional view taken along the line I-O-I of FIG. FIG. 4 is a schematic plan view showing a state where the top plate 53 of the ceiling-mounted indoor unit 4 is removed. FIG. 5 is a plan view of the decorative panel 52 of the ceiling-mounted indoor unit 4 as viewed from the air-conditioned room. FIG. 9 is a block diagram schematically showing the indoor controller 67 and various devices in the ceiling-mounted indoor unit 4 connected to the controller 67.

  The casing body 51a is a substantially octagonal box-like body in which long sides and short sides are alternately formed in a plan view, and the lower surface thereof is open. The casing body 51 a includes a substantially octagonal top plate 53 in which long sides and short sides are alternately and continuously formed, and a side plate 54 extending downward from the peripheral edge of the top plate 53. The side plate 54 includes side plates 54 a, 54 b, 54 c and 54 d corresponding to the long sides of the top plate 53, and side plates 54 e, 54 f, 54 g and 54 h corresponding to the short sides of the top plate 53. The side plate 54h constitutes a portion through which the indoor refrigerant pipes 43 and 44 for connecting the indoor heat exchanger 42 and the refrigerant communication pipes 5 and 6 pass (see FIG. 4).

  And as shown in FIG. 3, the indoor fan 41 and the indoor heat exchanger 42 are mainly arrange | positioned inside the casing main body 51a.

  The indoor fan 41 sucks air in the air-conditioned room into the casing main body 51a through the suction port 55, and air from the casing main body 51a through the blowout port 56 after the heat exchanged in the indoor heat exchanger 42. It is a centrifugal blower that blows out. The indoor fan 41 has an indoor fan motor 41a provided at the center of the top plate 53 of the casing body 51a, and an impeller 41b that is connected to the indoor fan motor 41a and is driven to rotate. The impeller 41b is an impeller having turbo blades. Air can be sucked into the impeller 41b from below and blown out toward the outer peripheral side of the impeller 41b in plan view. The indoor fan motor 41a can vary the rotation speed (that is, the operating frequency) by an inverter device (not shown), thereby enabling the air volume control of the indoor fan 41.

  The indoor heat exchanger 42 is a heat exchanger that functions as a refrigerant evaporator during the cooling operation and functions as a refrigerant radiator during the heating operation. The indoor heat exchanger 42 is connected to the refrigerant communication pipes 5 and 6 (see FIG. 1) via the indoor refrigerant pipes 43 and 44, and is bent and arranged so as to surround the indoor fan 41 in a plan view. It consists of a finned tube heat exchanger. The indoor heat exchanger 42 performs heat exchange between the air in the air-conditioned room sucked into the casing body 51a and the refrigerant, cools the air in the air-conditioned room during the cooling operation, and heats the air in the air-conditioned room during the heating operation. Can be done.

  A drain pan 45 is installed below the indoor heat exchanger 42 and below the casing body 51a. The drain pan 45 is for receiving drain water generated by condensation of moisture in the air by the indoor heat exchanger 42. A bell mouth 41 c for guiding the air sucked from the suction port 55 to the impeller 41 b of the indoor fan 41 is disposed in the suction hole 45 j of the drain pan 45.

  The decorative panel 52 is a plate-like body having a substantially quadrangular shape in plan view, and mainly includes a panel body 52a fixed to the lower end portion of the casing body 51a. A blowout port 56 and a suction port 55 are formed in the panel main body 52a. The blowout port 56 is an opening for blowing air into the air-conditioned room, and is positioned along the peripheral edge of the panel main body 52a in plan view. The suction port 55 is an opening for sucking air in the air-conditioned room, and is positioned so as to be surrounded by the substantially center of the panel main body 52a, that is, the blow-out port 56 in a plan view. More specifically, the suction port 55 is a substantially quadrangular opening, and the suction port 55 includes a suction grill 57 and a suction filter for removing dust in the air sucked from the suction port 55. 58 is provided. The blowout port 56 is a substantially quadrangular annular opening. Thereby, not only the direction corresponding to each side of the quadrilateral of the panel body 52a (refer to the directions of arrows X1, X2, X3, and X4 in FIG. 5), but also the respective corners of the square of the panel body 52a. The conditioned air is also blown out in the direction (see the directions of arrows Y1, Y2, Y3, and Y4 in FIG. 5).

-Horizontal blade-
The four horizontal blades 71a to 71d are positioned so as to correspond to the respective sides of the quadrangular shape of the panel main body 52a, and are provided rotatably at the outlet 56. The horizontal blades 71a to 71d can change the vertical air direction angle of the conditioned air blown into the air conditioned room. More specifically, the horizontal blades 71a to 71d are plate-like members extending along the rectangular sides of the outlet 56, and both ends in the longitudinal direction of the horizontal blades 71a to 71d A pair of blade support portions 72 and 73 arranged so as to block a part of the mouth 56 are supported by the decorative panel 52 so as to be rotatable around a longitudinal axis. The horizontal blades 71a to 71d are driven by blade drive motors 74a, 74b, 74c, and 74d. Accordingly, the horizontal blades 71 a to 71 d can independently change the vertical direction of the wind direction and can reciprocate in the vertical direction with respect to the outlet 56. Here, the blade drive motors 74a to 74d are provided in the blade support portions 72 and 73, respectively.

  By the blade support portions 72 and 73, the blowout port 56 is connected to the side air outlets 56a, 56b, 56c, and 56d corresponding to the square sides of the panel main body 52a and the square corners of the panel main body 52a. Are divided into corner outlets 56e, 56f, 56g, and 56h corresponding to the parts. Here, an area in which air conditioning is performed mainly by the conditioned air blown from the side air outlet 56a (see arrows X1, Y1, and Y2 in FIG. 5) is referred to as “air conditioning target area A” (see FIG. 6). Further, an area where air conditioning is performed mainly by conditioned air blown from the side air outlet 56b (see arrows X2, Y2, and Y3 in FIG. 5) is referred to as an “air conditioning target area B”. In addition, an area where air conditioning is performed mainly by conditioned air blown from the side air outlet 56c (see arrows X3, Y3, and Y4 in FIG. 5) is referred to as an “air conditioning target area C”. Furthermore, an area where air conditioning is performed mainly by conditioned air blown out from the side air outlet 56d (see arrows X4, Y4, and Y1 in FIG. 5) is referred to as an “air conditioning target area D”.

-Various sensors-
Examples of sensors provided in the ceiling-mounted indoor unit 4 according to this embodiment include an intake air temperature sensor 61, a human detection sensor 62, and a floor temperature sensor 63.

  The intake air temperature sensor 61 is a temperature sensor that detects an intake air temperature Tr that is the temperature of the air in the air-conditioned room that is sucked into the casing main body 51 a through the suction port 55. Here, the suction air temperature sensor 61 is provided in the suction port 55 as shown in FIG.

  The human detection sensor 62 is an infrared sensor that detects the distribution of people in the air-conditioned room (here, the presence or absence of people in the air-conditioning target areas A to D according to FIG. 6). One human detection sensor 62 is disposed at a position where the lower part of the decorative panel 52 can be arranged, here, at a corner of the decorative panel 52 (see FIGS. 2 and 5). More specifically, the human detection sensor 62 is provided at a position on the outer peripheral side of the corner outlet 56f so as to protrude downward from the surface of the decorative panel 52, and the shape of the decorative panel 52 in a plan view is substantially the same. It is circular. The human detection sensor 62 is a type of sensor that detects the presence / absence of a person in the air-conditioned room based on a change in infrared radiation energy radiated from an object. As shown in FIG. An opening 62a for receiving light is formed. Here, the opening 62a may be covered with a transparent member capable of causing the infrared light receiving element to receive infrared light. And the opening part 62a can rotate 360 degree | times in planar view of the decorative panel 52, and can detect the presence or absence of the person in each air-conditioning object area AD. In addition, as shown in FIG. 6, the detection range in the plan view of the human detection sensor 62 is set such that each detection angle α, β, γ, The range is such that δ is about 90 degrees. Further, as shown in FIG. 8, the detection range in the side view of the human detection sensor 62 is that each detection angle ε is about 135 degrees when detecting the presence or absence of a person in any of the air conditioning target areas A to D. This is the range.

  The human detection sensor 62 is not limited to the above-described structure. For example, instead of the opening 62a rotating, the infrared light receiving element may rotate, It may have four infrared light receiving elements facing the direction of D.

  The floor temperature sensor 63 is an infrared sensor that detects the temperature Tf of the floor surface in the air-conditioned room. The floor temperature sensor 63 is disposed at a position where the floor panel 63 can be disposed below the decorative panel 52, in this case, at a corner of the decorative panel 52. More specifically, like the human detection sensor 62, the floor temperature sensor 63 is provided at the position on the outer peripheral side of the corner outlet 56f so as to face downward from the surface of the decorative panel 52. The floor temperature sensor 63 detects the temperature Tf of the floor surface in the air-conditioned room based on the infrared radiation energy radiated from the object.

−Indoor control unit−
The indoor control unit 67 is a microcomputer composed of a CPU and a memory, and controls the operation of each device constituting the ceiling-mounted indoor unit 4. Specifically, as shown in FIG. 9, the indoor control unit 67 includes various sensors 61 to 63 in the indoor unit 4, an indoor fan motor 41 a, blade driving motors 74 a to 74 d, an outdoor unit communication unit 68, and The remote control receiver 69 is electrically connected. The outdoor unit communication unit 68 is for exchanging control signals and the like with the outdoor control unit 39 of the outdoor unit 2 and is electrically connected to the outdoor control unit 39 via the wiring 9. (See FIG. 1).

  Such an indoor control unit 67 is sent from the detection results of the various sensors 61 to 63 and various instructions given by the user in the air-conditioned room via the remote controller 99 (see FIG. 1), the outdoor control unit 39. Based on the control signal, drive control of the indoor fan motor 41a is performed, and drive control of each of the blade drive motors 74a to 74d is performed. For example, when the user gives an instruction to start a heating operation or a cooling operation via the remote controller 99, the indoor control unit 67 starts driving the motors 41a and 74a to 74d. In this case, the outdoor unit communication unit 68 sends to the outdoor control unit 39 a control signal indicating that the driving of the outdoor unit 2 is started and what kind of operation start instruction is given. Moreover, the indoor control part 67 stops the drive of each motor 41a, 74a-74d, when the stop instruction | indication of operation is made via the remote controller 99. FIG. In this case, the outdoor unit communication unit 68 sends a control signal for stopping the driving of the outdoor unit 2 to the outdoor control unit 39.

-Control of wind direction angle of horizontal blades-
Here, control of the wind direction angles of the horizontal blades 71a to 71d by the indoor control unit 67 will be described. While the air conditioner 1 performs the heating operation or the cooling operation, the indoor control unit 67 fixes the horizontal blades 71a to 71d based on the request from the remote controller 99, the detection values of the various sensors 61 to 63, and the like. The state or the swing state can be set. The fixed state refers to a state in which the wind direction angles of the horizontal blades 71a to 71d are fixed at a desired wind direction angle by driving the blade driving motors 74a to 74d. As shown in FIG. 10, the wind direction angles of the horizontal blades 71a to 71d are the wind direction P0 (horizontal blown wind direction) that is the wind direction angle at which the conditioned air blows out in the horizontal direction and the wind direction angle at which the conditioned air blows out to the lowest direction. Can be changed in a plurality of stages. Here, the wind direction angles of the horizontal blades 71a to 71d are the wind direction P0, the wind direction P1 that is lower than the wind direction P0, the wind direction P2 that is lower than the wind direction P1, the wind direction P3 that is lower than the wind direction P2, and the most downward wind direction. It can be changed to 5 levels of P4. In the swing state, the blade driving motors 74a to 74d are driven, and the wind direction angles of the horizontal blades 71a to 71d are repeatedly changed up and down within the wind direction change range (here, between the wind direction P0 and the wind direction P4). By this, the state which reciprocates and rotates each horizontal blade | wing 71a-71d is said. The indoor control unit 67 can control the wind direction angle described above for each of the horizontal blades 71a to 71d.

  In addition, each horizontal blade | wing 71a-71d takes the state which closed the blower outlet 56 (specifically, the side part blower outlets 56a-56d), when the ceiling installation type indoor unit 4 is not operating. . Hereinafter, for convenience of explanation, the wind direction angle when the horizontal blades 71a to 71d are in the closed state is represented as “wind direction P0c” (see FIG. 11). And each horizontal blade | wing 71a-71d can take any of wind direction P0c-P4 in the fixed state or swing state mentioned above in the state which is drive | operating.

-Control to swing adjacent horizontal blades synchronously-
However, when the ceiling-mounted indoor unit 4 starts operation, the temperature distribution in the air-conditioned room is biased. Therefore, at the start of the operation of the ceiling-mounted indoor unit 4, the air in the air-conditioned room is effectively stirred before the heating operation or the cooling operation is performed by sending the air-conditioned air to the actually desired wind direction angle. .

  Therefore, as shown in FIG. 11, the indoor control unit 67 according to the present embodiment performs four horizontal operations for a predetermined time (corresponding to the second predetermined time) after the operation start instruction for the ceiling-mounted indoor unit 4 is given. Among the blades 71a to 71d, drive control of the blade driving motors 74a to 74d is performed so that two adjacent horizontal blades (hereinafter referred to as first horizontal blades) swing in the same posture in synchronization. Thereby, rotation control of each horizontal blade | wing 71a-71d is performed. Further, in the rotation control, the indoor control unit 67 includes the remaining horizontal blades (for example, the horizontal blades 71c) other than the first horizontal blades (for example, the horizontal blades 71a and 71b) among the four horizontal blades 71a to 71d. 71d (hereinafter referred to as the second horizontal blade) is fixed at a predetermined angle (for example, wind direction P0).

  Further, the indoor control unit 67 is configured so that the combination of the first horizontal blades sequentially shifts along the peripheral edge of the decorative panel 52 for a predetermined time after the operation start instruction of the ceiling-mounted indoor unit 4 is made. A combination shift control of one horizontal blade is also performed. In particular, the indoor control unit 67 according to the present embodiment shifts the combination of the first horizontal blades each time the first horizontal blades reciprocate a predetermined number of times in the vertical direction with respect to the outlet 56.

  Hereinafter, the operations taken by the horizontal blades 71a to 71d by the above-described rotation control and combination shift control will be specifically described with reference to FIGS. 11 and 12 show, as an example, a case where the combination of the first horizontal blades is shifted every time the first horizontal blades are reciprocated once in the up-down direction, that is, once. In FIG. 12, the horizontal blades that are filled represent the first horizontal blades described above, and the horizontal blades that are not filled represent the second horizontal blades described above. Before the start of operation, the horizontal blades 71a to 71d are each in a posture (wind direction P0c) in which the outlet 56 is closed.

  At the start of operation, first, the horizontal blade 71a and the horizontal blade 71b that are adjacent to each other across the corner outlet 56f of the decorative panel 52 correspond to the first horizontal blade, and the blades 71a and 71b have the same timing and the same. Start swinging while taking the posture. Specifically, the horizontal blades 71a and 71b are both rotated at the same rotation speed in the direction of rotation from the wind direction P0c to the wind direction P4, that is, in the downward direction. Accordingly, the wind direction angles of the horizontal blades 71a and 71b reach from the wind direction P0 to the wind direction P1, the wind direction P2, and the wind direction P3 at the same timing, and eventually reach the wind direction P4 almost simultaneously. After the horizontal blades 71a and 71b reach the wind direction P4, the rotation direction of the horizontal blades 71a and 71b changes from the lower direction to the upper direction, and the wind direction angles of the horizontal blades 71a and 71b eventually reach the wind direction P0 almost simultaneously. Reach. In the meantime, the horizontal blade 71c and the horizontal blade 71d adjacent to each other across the corner portion outlet 56h are fixed with the outlet 56 closed (wind direction P0c). That is, while the horizontal blades 71a and 71b are the first horizontal blades, the horizontal blades 71c and 71d correspond to the second horizontal blades.

  When the horizontal blades 71a and 71b reciprocate once in the vertical direction, the combination of the first horizontal blades changes from the combination of the horizontal blades 71a and 71b to the combination of the horizontal blades 71b and 71c. On the other hand, the combination of the second horizontal blades changes from the combination of the horizontal blades 71c and 71d to the combination of the horizontal blades 71a and 71d. The horizontal blades 71b and 71c that have become the first horizontal blades swing only once in the vertical direction at the same timing and in the same posture as the horizontal blades 71a and 71b that were the first horizontal blades just before that. To do. During this time, the horizontal blades 71a and 71d, which are the second horizontal blades, are fixed in the state of the wind direction angle corresponding to the wind directions P0 and P0c, respectively.

  After the horizontal blades 71b and 71c reciprocate once in the vertical direction, the combination of the first horizontal blades changes from the combination of the horizontal blades 71b and 71c to the combination of the horizontal blades 71c and 71d. On the other hand, the combination of the second horizontal blades changes from the combination of the horizontal blades 71a and 71d to the combination of the horizontal blades 71a and 71b. The new horizontal blades 71c and 71d that have become the first horizontal blades swing only once in the vertical direction while taking the same posture and the horizontal blades 71a and 71b that have become the second horizontal blades, respectively. The wind direction angle corresponding to P0 remains unchanged.

  By repeating such an operation, of the four horizontal blades 71a to 71d, two horizontal blades adjacent to each other across the corner outlets 56e to 56h become the first horizontal blades, and the combination of the first horizontal blades is Each time the first horizontal blade swings once, the horizontal blades 71a, 71b change to 71b, 71c, 71b, 71c to 71c, 71d, and 71c, 71d to 71d, 71a. That is, in this embodiment, the combination of the first horizontal blades is sequentially shifted one by one in the clockwise direction in the bottom view of the decorative panel 52 (see FIGS. 5 and 12). Therefore, the combination of the first horizontal blades is a horizontal blade located on the left side of the two horizontal blades that were the first horizontal blades until now, and is located on the left side of this horizontal blade. It shifts sequentially so that it may become a combination with the horizontal blade | wing which was a horizontal blade | wing. Then, the remaining two horizontal blades 71a to 71d (two horizontal blades adjacent to each other across the other corner outlets 56e to 56h) at that time become the second horizontal blade, and the combination of the second horizontal blades is also the first It changes sequentially with the shift of the combination of one horizontal blade. That is, when attention is paid to the individual horizontal blades 71a to 71d, each horizontal blade 71a to 71d swings itself twice continuously, and then the posture is fixed by two swings of the other blades. The timing at which each horizontal blade 71a to 71d swings again from a fixed posture is not overlapped between the horizontal blades 71a to 71d, and is different for each horizontal blade 71a to 71b. Thereby, compared with the case where it swings separately without synchronizing each horizontal blade | wing 71a-71d, the air which blows off from the blower outlet 56 is mixed with a part of air in an air-conditioning room | chamber, and is 1st horizontal blade | wing. It is surely sent far away. Further, the combination of the first horizontal blades is sequentially shifted, so that air is not sent only in one direction but air is sent in various directions. Therefore, for example, as compared with a case where only one horizontal blade swings and this blade sequentially shifts, the air is strongly guided in various directions, and the agitation of air in the air-conditioned room is also improved. Rise.

  Furthermore, as shown in FIG. 11, the indoor control unit 67 temporarily moves the first horizontal blade when the rotation direction (vertical direction) of the first horizontal blade (for example, the horizontal blades 71a and 71b) changes. To stop automatically. For example, in FIG. 11, when the rotation direction of the horizontal blades 71a and 71b swinging as the first horizontal blades is the downward direction and the wind direction angle thereof reaches the wind direction P4, both the horizontal blades 71a and 71b are It is fixed during the rest period TA in the state of the wind direction P4. In this case, the air blown out from the side air outlets 56a and 56b and the corner air outlet 56f is blown out in the substantially vertical direction by the horizontal blades 71a and 71b during the rest period TA. Further, for example, when the rotation direction of the horizontal blades 71c and 71d swinging as the first horizontal blade is the upward direction and the wind direction angle thereof reaches the wind direction P0, the horizontal blades 71a and 71b are both in the wind direction P0. The state is fixed during the rest period TA. In this case, the air blown out from the side air outlets 56c and 56d and the corner air outlet 56h is blown out in the substantially horizontal direction by the horizontal blades 71c and 71d during the rest period TA. As described above, when the rotation direction of the first horizontal blade changes, the operation of the first horizontal blade is temporarily stopped, so that the air blown out from the blow-out port 56 can be reliably ensured in the vertical direction or the horizontal direction. Can be sent to.

  The suspension period TA is determined in advance by a desktop calculation, simulation, experiment, or the like based on the amount of air blown from the outlet 56 to the air conditioning room, the set temperature in the air conditioning room, or the like. . In this case, the length of the pause period TA is a maximum of 5 seconds, for example, 3 seconds.

  Moreover, the indoor control part 67 complete | finishes the said rotation control and combination shift control, and inclines each horizontal blade | wing 71a-71d by a predetermined angle after progress for a predetermined time from a driving | operation start. As a result, the first horizontal blade that has been swinging synchronously during the predetermined time from the start of operation stops the swing operation, and the second horizontal blade that has been fixed at a predetermined angle is released from being fixed, and each horizontal blade The wind direction angles 71a to 71d are any of the wind directions P0 to P4. For example, after a predetermined time has elapsed from the start of operation, the wind direction angle of each horizontal blade 71a to 71d takes any of the wind directions P0 to P4 depending on the type of operation, the set temperature, the air volume set via the remote controller 99, and the like. obtain. Further, when the swing operation is set via the remote controller 99, the horizontal blades 71a to 71d perform any swing operation that individually rotates in the vertical direction, so that any one of the wind directions P0 to P4 is achieved. Can be taken.

  Here, the predetermined time during which the rotation control and the combination shift control are performed may be, for example, 5 minutes, and may be determined in advance by desktop calculation, simulation, experiment, or the like. The predetermined time is appropriately determined by the indoor control unit 67 according to the state of the air-conditioned room at that time (specifically, the floor temperature Tf, the presence or absence of a person in the air-conditioned room, the intake air temperature Tr, etc.). May be.

-Air volume control-
The indoor control unit 67 controls the air volume of the indoor fan 41. As for the air volume of the indoor fan 41, the indoor controller 67 changes the rotation speed of the indoor fan motor 41a, so that the air volume H having the largest rotation speed and the large air volume H is smaller than the rotation speed of the air volume H, and the medium air volume. The air volume L can be changed in four stages between M, the air volume L with a smaller air volume than the rotational speed of the air volume M, and the air volume LL with a smaller air volume L smaller than the rotational speed of the air volume L. Here, the air volume H, the air volume M, and the air volume L can be set based on a request from the remote controller 99, detection values of the various sensors 61 to 63, and the like. However, the air volume LL cannot be set according to a request from the remote controller 99, and is set in a control manner in a predetermined control state.

-Remote control receiver-
The remote control receiver 69 is for receiving various requests from the remote controller 99, and is composed of, for example, an infrared light receiving element. Specifically, the remote control receiver 69 receives a cooling operation or heating operation start instruction given by the user via the remote controller 99, or sets the set temperature, air volume and direction of the air-conditioned room, and the operation of the timer. On and off instructions can be received.

  In particular, the remote control receiver 69 according to the present embodiment includes various settings relating to the wind direction made by the user via the remote controller 99, and “cycle swing” mode settings in which the above-described rotation control and combination shift control are performed. Can be accepted. Here, FIG. 13 shows, as an example, screens D1 and D2 displayed on the display unit 99a of the remote controller 99 when various settings received by the remote control receiving unit 69 are made by the user. The screen D1 is a main menu screen. When “wind direction setting” is selected from the main menu, a mode selection screen D2 is displayed. From the screen D2, “independent swing” mode in which the horizontal blades 71a to 71d individually rotate independently from the start of operation for a predetermined time from the start of operation, the above-described rotation control and combination One of the “cycle swing” modes in which shift control is performed can be selected.

<Operation>
(1) Flow of overall operation of ceiling-mounted indoor unit FIGS. 14 and 15 are flowcharts showing the flow of overall operation of the air conditioner 1 in which the ceiling-mounted indoor unit 4 according to this embodiment is employed. FIG.

  Step S1: When the user gives an instruction to start operations such as heating operation and cooling operation of the air conditioner 1 via the remote controller 99 (Yes in S1), the outdoor unit 2 and the ceiling-mounted indoor unit 4 are operated. To start.

  Steps S2 to S3: If the “cycle swing” mode is set via the remote controller 99 before the operation start instruction is given (Yes in S2), the indoor control unit 67 performs the above-described FIGS. The rotation control of each horizontal blade | wing 71a-71d which concerns on, and the combination shift control of a 1st horizontal blade | wing are performed (S3). In other words, the indoor control unit 67 performs rotation control so that the first horizontal blade is swung while taking the same posture synchronously, and the second horizontal blade is fixed at a predetermined angle. Take control. Furthermore, each time the first horizontal blade swings once, the indoor control unit 67 shifts the combination of the first horizontal blades one by one in the clockwise direction in the bottom view of the decorative panel 52.

  Step S4: When the “independent swing” mode is set in step S2 (No in S2), the indoor control unit 67 does not rotate each of the horizontal blades 71a to 71d in synchronization and individually. Rotate (S4).

  Steps S5 to S6: When a predetermined time has elapsed since the operation start instruction according to Step S1 was made (Yes in S5), the indoor control unit 67 ends the control of the horizontal blades 71a to 71d according to Steps S3 and S4. (S6).

  Steps S7 to S8: When the content of the operation instructed in Step S1 is “heating operation” (Yes in S7), the indoor control unit 67 causes the air-conditioned room to be heated according to a desired setting. Then, based on the wind direction and the air volume requested via the remote controller 99, control of the wind direction angle of each horizontal blade 71a to 71d and air volume control are performed (S8).

  Steps S9 to S10: When the content of the operation instructed in Step S1 is “cooling operation” (Yes in S9), the indoor control unit 67 causes the air-conditioned room to be cooled according to a desired setting. Then, based on the wind direction and the air volume requested via the remote controller 99, control of the airflow direction angle and air volume control of each of the horizontal blades 71a to 71d is performed (S10).

  Step S11: Until the operation end of the air conditioner 1 is instructed via the remote controller 99 (No in S11), the operations of Steps S8 and S10 are continuously performed. When the end of the operation of the air conditioner 1 is instructed (Yes in S11), the outdoor unit 2 and the ceiling-mounted indoor unit 4 end the operation.

(2) Heating operation Below, the operation | movement in case the air conditioning apparatus 1 performs the heating operation (step S8) mentioned above is demonstrated.

  The heating operation is performed by circulating the refrigerant in the refrigerant circuit 10 so that the outdoor heat exchanger 23 functions as a refrigerant evaporator and the indoor heat exchanger 42 functions as a refrigerant radiator. In this operation, air is heated and supplied as air-conditioned air into the air-conditioned room.

  In the heating operation, the outdoor heat exchanger 23 functions as a refrigerant evaporator and the indoor heat exchanger 42 functions as a refrigerant radiator (that is, indicated by a broken line of the four-way switching valve 22 in FIG. 1). The four-way selector valve 22 is switched so that

  In the refrigerant circuit 10 in such a state, the low-pressure refrigerant in the refrigeration cycle is sucked into the compressor 21 and is discharged after being compressed to a high pressure in the refrigeration cycle. The high-pressure refrigerant discharged from the compressor 21 is sent to the indoor heat exchanger 42 through the four-way switching valve 22, the gas side closing valve 26 and the gas refrigerant communication pipe 6. The high-pressure refrigerant sent to the indoor heat exchanger 42 radiates heat by exchanging heat with the air in the air-conditioned room supplied by the indoor fan 41 in the indoor heat exchanger 42. Thereby, the air in the air-conditioned room is heated to become air-conditioned air, and is blown out from the air outlet 56 (more specifically, the side air outlets 56a to 56d and the corner air outlets 56e to 56h) into the air-conditioned room. The high-pressure refrigerant that has radiated heat in the indoor heat exchanger 42 is sent to the expansion valve 24 through the liquid refrigerant communication tube 5 and the liquid-side shut-off valve 25, and is depressurized to a low pressure in the refrigeration cycle. The low-pressure refrigerant decompressed by the expansion valve 24 is sent to the outdoor heat exchanger 23. The low-pressure refrigerant sent to the outdoor heat exchanger 23 evaporates by exchanging heat with the air in the air-conditioned room supplied by the outdoor fan 27 in the outdoor heat exchanger 23. The low-pressure refrigerant evaporated in the outdoor heat exchanger 23 is again sucked into the compressor 21 through the four-way switching valve 22.

  In such heating operation, the intake air temperature Tr is controlled to be the target air temperature Trs requested from the remote controller 99 or the like. That is, in the heating operation, when the intake air temperature Tr is lower than the target air temperature Trs, the above-described operation control (hereinafter, this state is referred to as a heating thermo-on state) is performed. When the intake air temperature Tr reaches the target air temperature Trs, the compressor 21 is stopped so as not to circulate the refrigerant in the refrigerant circuit 10, and the air volume of the indoor fan 41 is set to the air volume LL. Control to be changed (hereinafter, this state is referred to as a heating thermo-off state) is performed.

  In addition, when control based on the required air direction and the required air volume is performed, the indoor control unit 67 is based on the detection results of the various sensors 61 to 63 so that the comfort of the user in the air-conditioned room can be improved. The airflow direction angle of each horizontal blade | wing 71a-71d and the air volume of the indoor fan 41 can be controlled, setting to various wind directions and air volume.

  For example, when the human detection sensor 62 detects the presence of a person in the air-conditioning target areas A to D, the indoor control unit 67, based on the detected value, the side corresponding to the air-conditioning target area where the presence of the person is detected. The wind direction angle of the horizontal blades at the air outlet can be set to the wind direction P0. On the other hand, in the air-conditioning target area in which the absence of a person is detected among the air-conditioning target areas A to D, the indoor control unit 67 has horizontal blades at the side outlet corresponding to the air-conditioning target area in which the presence of a person is detected. Can be set to wind directions P1 to P3 or the like that are lower than the wind direction P0. Thereby, the discomfort by the user's draft which exists in air-conditioning object area AD can be suppressed, and a user's comfort can be improved.

  When the floor temperature Tf in the air-conditioned room detected by the floor temperature sensor 63 is lower than the target floor surface temperature Tfs, the indoor control unit 67 sets the wind direction angle of each horizontal blade 71a to 71d to the downward wind direction ( For example, the wind direction P3, P4, etc.) can be set. On the other hand, when the temperature Tf of the floor surface in the air-conditioned room has reached the target floor surface temperature Tfs, the wind direction angle of each horizontal blade 71a to 71d is higher than the wind directions P3, P4, etc. (for example, the wind direction P0, P1 etc.). Thereby, when the vicinity of the floor surface in the air-conditioned room is not sufficiently warmed, the warm air can reach the floor surface, and the comfort of the user in the air-conditioned room can be improved.

  In addition, the indoor control unit 67 includes an average temperature between the intake air temperature Tr detected by the intake air temperature sensor 61 and the floor surface temperature Tf in the air-conditioning room, a combination of the average temperature and the detection result of the human detection sensor 62, and the like. Based on the above, the wind direction angle and the wind flow of each of the horizontal blades 71a to 71d may be changed.

(3) Cooling operation Below, the operation | movement in case the air conditioning apparatus 1 performs the cooling operation (step S10) mentioned above is demonstrated.

  The cooling operation is performed by circulating the refrigerant in the refrigerant circuit 10 so that the outdoor heat exchanger 23 functions as a refrigerant radiator and the indoor heat exchanger 42 functions as a refrigerant evaporator. In this operation, air is cooled and supplied to the air-conditioned room as conditioned air.

  In the cooling operation, the outdoor heat exchanger 23 functions as a refrigerant radiator and the indoor heat exchanger 42 functions as a refrigerant evaporator (that is, indicated by the solid line of the four-way switching valve 22 in FIG. 1). The four-way selector valve 22 is switched so that

  In the refrigerant circuit 10 in such a state, the low-pressure refrigerant in the refrigeration cycle is sucked into the compressor 21 and is discharged after being compressed to a high pressure in the refrigeration cycle. The high-pressure refrigerant discharged from the compressor 21 is sent to the outdoor heat exchanger 23 through the four-way switching valve 22. The high-pressure refrigerant sent to the outdoor heat exchanger 23 radiates heat by exchanging heat with outdoor air supplied by the outdoor fan 27 in the outdoor heat exchanger 23. The high-pressure refrigerant that has dissipated heat in the outdoor heat exchanger 23 is sent to the expansion valve 24 and is decompressed to a low pressure in the refrigeration cycle. The low-pressure refrigerant decompressed by the expansion valve 24 is sent to the indoor heat exchanger 42 through the liquid side closing valve 25 and the liquid refrigerant communication pipe 5. The low-pressure refrigerant sent to the indoor heat exchanger 42 evaporates by exchanging heat with air in the air-conditioned room supplied by the indoor fan 41 in the indoor heat exchanger 42. Thereby, the air in the air-conditioned room is cooled to become air-conditioned air, and is blown into the air-conditioned room from the air outlet 56 (more specifically, the side air outlets 56a to 56d and the corner air outlets 56e to 56h). The low-pressure refrigerant evaporated in the indoor heat exchanger 42 is again sucked into the compressor 21 through the gas refrigerant communication pipe 6, the gas side closing valve 26 and the four-way switching valve 22.

  In such cooling operation, the intake air temperature Tr is controlled to be the target air temperature Trs requested from the remote controller 99 or the like. That is, in the cooling operation, when the intake air temperature Tr is higher than the target air temperature Trs, the above-described operation control (hereinafter, this state is referred to as a cooling thermo-on state) is performed. When the intake air temperature Tr reaches the target air temperature Trs, the compressor 21 is stopped so as not to circulate the refrigerant in the refrigerant circuit 10, and the air volume of the indoor fan 41 is set to the air volume LL. Control to be changed (hereinafter, this state is referred to as a cooling thermo-off state) is performed.

  In addition, when control based on the required air direction and the required air volume is performed, the indoor control unit 67 is based on the detection results of the various sensors 61 to 63 so that the comfort of the user in the air-conditioned room can be improved. The airflow direction angle of each horizontal blade | wing 71a-71d and the air volume of the indoor fan 41 can be controlled, setting to various wind directions and air volume.

  For example, when the human detection sensor 62 detects the presence of a person in the air-conditioning target areas A to D, the indoor control unit 67, based on the detected value, the side corresponding to the air-conditioning target area where the presence of the person is detected. The wind direction angle of the horizontal blades at the air outlet can be set to the wind direction P0. On the other hand, in the air-conditioning target area in which the absence of a person is detected among the air-conditioning target areas A to D, the wind direction angle P0 indicates the wind direction angle of the horizontal blades at the side outlet corresponding to the air-conditioning target area in which the presence of a person is detected. The wind direction P1 to P3 can be set downward. Thereby, the discomfort by the user's draft which exists in air-conditioning object area AD can be suppressed, and a user's comfort can be improved.

<Features>
The ceiling-mounted indoor unit 4 according to this embodiment has the following characteristics.

(1)
In the conventional indoor unit, the air in the air-conditioned room is agitated by swinging adjacent horizontal blades in the opposite directions. However, in this indoor unit, the air sent from each of the adjacent horizontal blades to the air-conditioned room weakens each other, and the wind power decreases. Therefore, the stirring force of the air in the air-conditioned room becomes weak, and it becomes difficult to send the air blown from the outlet to a place away from the indoor unit. Also, even if only one horizontal blade is swung and the swinging horizontal blade is sequentially shifted, the amount of air guided from one horizontal blade to the air-conditioned room is small, and the room air is not enough It cannot be stirred.

  On the other hand, in the ceiling-mounted indoor unit 4 according to the present embodiment, the first horizontal blades that are the two horizontal blades 71a to 71d adjacent to each other swing while taking the same posture synchronously. Thereby, the air blown out from the blow-out port 56 is sent into the air-conditioned room so as to be surrounded by the first horizontal blades, and the air in the air-conditioned room is agitated. Therefore, in the ceiling-mounted indoor unit 4 according to the present embodiment, a high agitation effect can be obtained as compared with the case where adjacent horizontal blades individually swing, and the outlet of the ceiling-mounted indoor unit 4 The air blown from 56 to the air conditioning room can be sent further.

  In particular, in the present embodiment, the combination of the first horizontal blades is shifted in order along the peripheral edge of the decorative panel 52. Therefore, a higher agitation effect can be obtained as compared with the case where the combination of the first horizontal blades that swing in synchronization is fixed.

(2)
Moreover, in the ceiling-mounted indoor unit 4 according to the present embodiment, the combinations of the first horizontal blades are shifted one by one in order. For this reason, the air in the air-conditioned room is more easily stirred.

(3)
In the ceiling-mounted indoor unit 4 according to this embodiment, the combination of the first horizontal blades is shifted each time the first horizontal blades reciprocate a predetermined number of times in the vertical direction with respect to the outlet 56. That is, the timing at which the combination of the first horizontal blades is shifted is adjusted to the reciprocating motion of the first horizontal blade. Therefore, by setting the number of reciprocating rotations, it is possible to prioritize the ability to reach air far away or prioritize the agitation of the air in the air-conditioned room.

(4)
Further, in the ceiling-mounted indoor unit 4 according to the present embodiment, while the first horizontal blades swing while taking the same posture synchronously, the second horizontal blades that are the remaining blades other than the first horizontal blades are predetermined. Fixed at an angle of Therefore, the air in the air-conditioned room is agitated by the swinging first horizontal blade, and the air in the air-conditioned room is sent, for example, far away by the second horizontal blade.

(5)
Furthermore, in the ceiling-mounted indoor unit 4 according to the present embodiment, as shown in FIG. 11, a so-called pause period in which the operation of the first horizontal blade temporarily stops when the rotation direction of the first horizontal blade changes. TA is provided. This is because, for example, during the heating operation, if the rotation direction immediately changes from the lower direction to the upper direction, the vicinity of the floor in the air-conditioned room is difficult to warm. Thereby, in the middle of stirring the air in the air-conditioned room, the air blown from the blowout port 56 is reliably blown out, for example, in the horizontal direction or the vertical direction. Therefore, for example, during the heating operation, when the rotation direction changes from the downward direction to the upward direction, the warm air from the outlet 56 is blown downward, so that the temperature in the air-conditioning room is uneven. The floor area can be warmed while improving.

  Further, for example, during the cooling operation, when the rotation direction changes from the upper direction to the lower direction, the cold air from the blowout port 56 is blown out upward, so that the user can perform a so-called cold draft. The feeling of discomfort felt can be suppressed.

(6)
Further, in the ceiling-mounted indoor unit 4 according to the present embodiment, the first horizontal blades swing while taking the same posture synchronously from the start of operation until a predetermined time elapses, and the combination of the first horizontal blades Are sequentially shifted along the peripheral edge of the lower surface. However, after a predetermined time has elapsed, these operations are finished, and the horizontal blades 71a to 71d are inclined by a predetermined angle. As a result, air having a desired temperature can be supplied into the air-conditioned room where the air has been sufficiently agitated, so that discomfort felt by the user due to the draft can be suppressed, and the air-conditioned room can be made comfortable.

(7)
Moreover, in the ceiling-mounted indoor unit 4 according to the present embodiment, the first horizontal blades adjacent to each other sandwiching the arbitrary corner air outlets 56e to 56h swing while taking the same posture in synchronization. Further, the combination of the first horizontal blades is sequentially shifted. Therefore, the air blown out from the corner outlets 56e to 56h is the first while taking in part of the air in the air-conditioned room together with the air blown from the side outlets 56a to 56d opened and closed by the first horizontal blades. It is reliably sent far away by the horizontal blade. Therefore, as compared with the case where the individual horizontal blades are individually swung without being synchronized, the air in the air-conditioned room can be agitated by more air that is blown out, and more air-conditioned air can be sent far away. .

(8)
In particular, in the present embodiment, the first horizontal blade is composed of two horizontal blades 71a to 71d that are adjacent to each other. This makes it possible to effectively stir the air in the air-conditioned room and to increase the amount of conditioned air. Can be sent far away.

<Other embodiments>
As mentioned above, although embodiment of this invention was described based on drawing, a specific structure is not restricted to these embodiment, It can change in the range which does not deviate from the summary of invention.

(A)
In the above embodiment, the case where the combination of the first horizontal blades is shifted each time the first horizontal blade is swung once has been described. However, the indoor control unit 67 may shift the combination of the first horizontal blades after the first horizontal blades have swung twice or more instead of once.

  Further, as shown in FIG. 16, the indoor control unit 67 may shift the combination of the first horizontal blades every time the first horizontal blades swing for a predetermined time (corresponding to the first predetermined time). Here, FIG. 16 shows a case where the combination of the first horizontal blades changes every minute as an example. In FIG. 16, similarly to FIG. 12, the filled horizontal blades represent the first horizontal blades, and the unfilled horizontal blades represent the second horizontal blades.

  It should be noted that the number of swings of the first horizontal blades and the time of the swing, which is the timing at which the combination of the first horizontal blades is shifted, may be determined in advance by desktop calculation, simulation, experiment, or the like. Depending on the state (specifically, the floor temperature Tf, the presence / absence of a person in the air-conditioned room, the intake air temperature Tr, etc.), it may be appropriately determined by the indoor control unit 67. By appropriately setting the time for swinging, priority can be given to the ability to reach the air far away, and priority can be given to the agitation of the air in the air-conditioned room.

(B)
In the above-described embodiment, the case where the combination of the first horizontal blades sequentially shifts clockwise in the bottom view of the decorative panel 52 has been described. However, the combination of the first horizontal blades may be sequentially shifted counterclockwise in the bottom view of the decorative panel 52. Whether to shift clockwise or counterclockwise may be determined in advance by desktop calculation, simulation, experiment, or the like, and the state of the air-conditioned room at that time (specifically, the floor temperature Tf, Depending on the presence / absence of a person in the air-conditioned room, the intake air temperature Tr, and the like, the room controller 67 may appropriately determine the value.

(C)
In the above embodiment, the case where the second horizontal blade is fixed at the wind direction “P0” as shown in FIG. 11 has been described. However, the angle at which the second horizontal blade is fixed is not limited to the wind direction “P0”, and may be any angle. For example, the second horizontal blade may be fixed at an angle corresponding to the downward air direction “P4” in the heating operation, and may be fixed at an angle corresponding to the upward air direction “P1” in the cooling operation. .

  Further, the second horizontal blade is not fixed at a predetermined angle while the first horizontal blade swings between the wind direction P0 and the wind direction P4. For example, the second horizontal blade swings small between the wind direction P0 and the wind direction P1. It may be. In this case, the swing of the second horizontal blade is sufficiently smaller than the swing of the first horizontal blade.

(D)
In the above-described embodiment, the case where the first horizontal blade is composed of two has been described. However, the number of blades constituting the first horizontal blade may be two or more, for example, three. However, the upper limit of the number of blades constituting the first horizontal blades is required to be N-1 or less, where N is the number of horizontal blades provided in the ceiling-mounted indoor unit. That is, the number M of blades constituting the first horizontal blade needs to satisfy the condition “2 ≦ M ≦ N−1”.

  17 and 18 show a case where the first horizontal blade is composed of three horizontal blades adjacent to each other. Specifically, as shown in FIGS. 17 and 18, combinations as the first horizontal blades are combinations of horizontal blades 71a, 71b, 71c, combinations of horizontal blades 71b, 71c, 71d, and horizontal blades 71c, 71d, 71a. A combination and a combination of horizontal blades 71d, 71a, 71b can be mentioned. For example, when the combination of the first horizontal blades is the horizontal blades 71a to 71c, the horizontal blades 71d other than the blades 71a to 71c are the second horizontal blades. In this case, the horizontal blades 71a to 71c that are the first horizontal blades swing while taking the same posture synchronously, and the horizontal blade 71d that is the second horizontal blade is fixed at a predetermined angle (for example, the wind direction P0). The Then, after the first horizontal blade swings once, the combination of the first horizontal blades is sequentially shifted along the peripheral edge of the decorative panel 52. Specifically, in FIGS. 17 and 18, the combination of the first horizontal blades is shifted one by one clockwise in the bottom view of the decorative panel 52. That is, paying attention to the individual horizontal blades 71a to 71d, the horizontal blades 71a to 71d each take a posture of being fixed at a predetermined angle by one swing of the other blades after swinging three times continuously. ing. The timing at which the swing is started again from the posture in which the horizontal blades 71a to 71d are fixed is not overlapped between the horizontal blades 71a to 71d, and is different for each horizontal blade 71a to 71b. Thereby, while being able to stir the air in an air-conditioned room effectively, more air-conditioned air can be sent to a distant place.

  In FIGS. 17 and 18, the combination of the first horizontal blades is shifted one by one as shown in the shift from the combination of the horizontal blades 71a, 71b, 71c to the combination of the horizontal blades 71b, 71c, 71d. I explained the case of going. However, when the first horizontal blade is composed of three horizontal blades, the combination is not limited to shifting one by one, and may be shifted two by two. As a case of shifting two by two, for example, a shift from a combination of horizontal blades 71a, 71b, 71c to a combination of horizontal blades 71c, 71d, 71a can be mentioned.

(E)
In the above embodiment, as illustrated in FIG. 11, the case has been described in which all the horizontal blades 71 a to 71 d are inclined at a predetermined angle after the cycle swing mode is performed from the start of operation and a predetermined time has elapsed. However, only the horizontal blade that was the first horizontal blade immediately before the predetermined time may be shifted to the operation of tilting the predetermined angle after the predetermined time has elapsed. For example, the horizontal blade that was the second horizontal blade immediately before the elapse of a predetermined time may be continuously taken after the predetermined time has elapsed without being swung.

(F)
In the above embodiment, a case where there are four horizontal blades, that is, a case where conditioned air is blown out in four directions has been described. However, the number of horizontal blades is not limited to this, and may be four or more. That is, the ceiling-mounted indoor unit 4 according to the present invention can be applied even when air-conditioned air is blown out in four or more directions.

(G)
In the embodiment described above, the ceiling-mounted indoor unit 4 of the type in which the decorative panel 52 corresponding to the lower surface of the casing 51 is provided with the outlet 56 and the four horizontal blades 71a to 71d has been described. However, the ceiling-mounted indoor unit according to the present invention can also be employed in a type of indoor unit in which a blowout port is provided on each side surface of the casing.

(H)
In the above embodiment, the case where the suspension period TA is determined to be a predetermined value in advance has been described. However, the suspension period TA may be appropriately changed according to the detection results of the various sensors 61 to 63 at that time.

  For example, it is assumed that a person in the air conditioning target areas A to D is not detected by the human detection sensor 62 during the heating operation. In this case, the floor surface temperature Tf is low, and the temperature difference between the intake air temperature Tr detected by the intake air temperature sensor 61 and the floor surface temperature Tf detected by the floor temperature sensor 63 is greater than or equal to the first temperature difference. If it is larger, the indoor control unit 67 sets the pause period TA longer (for example, 5 seconds). Conversely, when the floor surface temperature Tf is high and the temperature difference is equal to or smaller than the second temperature difference lower than the first temperature difference, the indoor control unit 67 sets the pause period TA to be shorter (for example, 1 second). May be.

  In addition, the length of the suspension period may differ depending on whether the operation instructed to start is heating or cooling, and may differ depending on the air direction of the air blown out from the outlet 56. For example, during the heating operation, the pause period may be set short when the wind direction angle of the horizontal blades 71a to 71d is the wind direction P0, and may be set long when the wind direction angle of the horizontal blades 71a to 71d is the wind direction P4. Good. As a result, when the rotation direction is changed, the air heated by the heat exchange is not blown out in the horizontal direction, but is blown out in the vertical direction for a relatively long time. Therefore, the temperature Tr of the floor surface can be raised while stirring the air in the air-conditioned room. Further, during the cooling operation, the pause period may be set longer when the wind direction angle of the horizontal blades 71a to 71d is the wind direction P0, and may be set shorter when the wind direction angle of the horizontal blades 71a to 71d is the wind direction P4. . As a result, even when the air in the air-conditioning room is being stirred, when the rotation direction changes, the air cooled by heat exchange is not blown out much in the vertical direction but is relatively long in the horizontal direction. Time will be blown out. Therefore, the discomfort felt by the user due to the cold draft can be suppressed.

(I)
In the above embodiment, the first horizontal blades swing while taking the same posture synchronously, and the operation of sequentially shifting the combination of the first horizontal blades is performed until a predetermined time elapses from the start of operation. did. However, these operations are not limited to a predetermined time from the start of operation (that is, immediately after activation of the air conditioner), and are performed during normal operation in which the room is adjusted to a temperature requested by the user by heating and cooling. It may be broken.

  The present invention can be widely applied to a ceiling-mounted indoor unit of an air conditioner in which a plurality of horizontal blades capable of independently changing the vertical wind direction angle are provided at the outlet.

DESCRIPTION OF SYMBOLS 1 Air conditioning apparatus 4 Ceiling installation type indoor unit 39 Outdoor control part 41 Indoor fan 51 Casing 56 Outlet 56a, 56b, 56c, 56d Side part outlet 56e, 56f, 56g, 56h Corner part outlet 61 Intake air temperature sensor 62 Human detection sensor 63 Floor temperature sensor 71a, 71b, 71c, 71d Horizontal blade 67 Indoor control unit 69 Remote control receiver 99 Remote controller 99a Display unit D1, D2, D3, D4 Screen displayed on the display unit of the remote controller

JP 2009-103417 A

Claims (8)

A ceiling-mounted indoor unit of an air conditioner provided on the ceiling of an air conditioning room,
A casing (51) having a blowout port (56) formed along the peripheral edge of the lower surface;
At least four horizontal blades (71a to 71d) that are rotatably provided at the outlet (56) and that can independently change the vertical wind direction angle;
The first horizontal blades, which are the two horizontal blades adjacent to each other among the horizontal blades, swing while taking the same posture synchronously, and the combination of the first horizontal blades is sequentially shifted along the peripheral edge. And a control unit (67) for controlling each of the horizontal blades (71a to 71d),
Equipped with a,
The lower surface of the casing (51) has a substantially quadrangular shape in plan view,
Four horizontal blades (71a to 71d) are provided corresponding to each side of the lower surface,
The control unit (67) sequentially shifts the combination of the first horizontal blades one by one.
A ceiling-mounted indoor unit (4) for an air conditioner. The controller (67) shifts the combination of the first horizontal blades each time the first horizontal blades reciprocate a predetermined number of times in the vertical direction with respect to the outlet.
The ceiling installation type indoor unit (4) of the air conditioning apparatus of Claim 1. The control unit (67) shifts the combination of the first horizontal blades each time the first horizontal blades swing for a first predetermined time.
The ceiling installation type indoor unit (4) of the air conditioning apparatus of Claim 1. While the first horizontal blade swings while taking the same posture synchronously, the control unit (67) sets the remaining second horizontal blades excluding the first horizontal blade among the at least four horizontal blades to a predetermined level. Make it fixed at an angle,
The ceiling installation type indoor unit (4) of the air conditioning apparatus of any one of Claims 1-3 . The first horizontal blades (71a to 71d) reciprocate in the vertical direction with respect to the outlet,
The controller (67) temporarily stops the operation of the horizontal blade when the rotational direction of the first horizontal blade changes.
Ceiling-mounted indoor unit of an air conditioner according to any one of claims 1 to 4 (4). The control unit (67)
Each of the first horizontal blades swings in the same posture synchronously during a second predetermined time from the start of operation, and the combination of the first horizontal blades sequentially shifts along the peripheral edge. Control the horizontal blade,
After the second predetermined time has elapsed from the start of operation, the first horizontal blade is inclined by a predetermined angle.
The ceiling installation type indoor unit (4) of the air conditioning apparatus of any one of Claims 1-5 . The outlet (56) has a corner outlet that is divided by the horizontal blades (71a to 71d) and corresponds to each corner of the lower surface,
The ceiling installation type indoor unit (4) of the air conditioning apparatus of any one of Claims 1-6 . The first horizontal blade is composed of three horizontal blades adjacent to each other.
The ceiling installation type indoor unit (4) of the air conditioning apparatus of Claim 7 .

Images