JP2020063861A - Air conditioning system, and heat source unit of air conditioning system - Google Patents

Abstract

To provide a heat source unit of a slim air conditioning system.SOLUTION: A heat source unit of an air conditioning system includes a heat source side heat exchanger 40 including a first heat exchange part 42 and a second heat exchange part 44, a heat source side fan 60 which generates an air stream passing through the heat source side heat exchanger and is arranged in a leeward side in an air stream direction D1 with respect to the heat source side heat exchanger, and a casing 110 which accommodates the heat source side heat exchanger and the heat source side fan and has a back surface 112 arranged to face a windward side in the direction D1. The first heat exchange part has a first flat surface F1 in the windward side in the direction D1, and the second heat exchange part has a second flat surface F2 in the windward side in the direction D1. An angle α between the first flat surface and the second flat surface is an obtuse angle.SELECTED DRAWING: Figure 5

Description

  The present invention relates to an air conditioner and a heat source unit of the air conditioner.

  BACKGROUND ART Conventionally, there is known an air conditioner including a heat source unit that uses a heat source side heat exchanger formed in a single flat plate shape, as in Patent Document 1 (JP 2007-127388 A).

  When a heat source side heat exchanger formed in a single flat plate shape as disclosed in Patent Document 1 (JP 2007-127388A) is used for the heat source unit of the air conditioner, air conditioning When trying to increase the processing capacity of the device, the width of the heat source side heat exchanger becomes large, and the width of the heat source unit also increases, which may make it difficult to arrange the heat source unit in a limited space. is there.

  The heat source unit of the air conditioner according to the first aspect includes a heat exchanger, a fan, and a casing. The heat exchanger includes a first heat exchange section and a second heat exchange section. The fan produces an airflow passing through the heat exchanger and is arranged leeward of the heat exchanger in the direction of the airflow. The casing houses the heat exchanger and the fan. The casing has a first side surface that faces the windward side in the direction of the airflow of the heat exchanger. The first heat exchange unit has a first plane on the windward side in the direction of the air flow. The second heat exchange section has a second plane on the windward side in the direction of the air flow. The angle formed by the first plane and the second plane is an obtuse angle.

  In the heat source unit of the air conditioner of the first aspect, as compared with the case of using a single flat plate-shaped heat exchanger, a slim heat source having the same heat exchange capacity and suppressing the width of the first side surface of the casing. Can be realized with a unit. Therefore, the heat source unit can be installed even in a relatively narrow space.

  The heat source unit of the air conditioner of the second aspect is the heat source unit of the air conditioner of the first aspect, and in plan view, the first plane and the second plane spread in a direction intersecting the first side surface of the casing. .

  In the heat source unit of the air conditioner of the second aspect, the heat exchanger is provided in the casing such that the first plane of the first heat exchange section and the second plane of the second heat exchange section intersect the first side surface of the casing. Since they are arranged, it is easy to realize a slim heat source unit in which the width of the first side surface of the casing is suppressed.

  The heat source unit of the air conditioner of the third aspect is the heat source unit of the air conditioner of the first aspect or the second aspect, and the casing extends from both ends of the first side face to intersect the first side face. It further has a side surface and a third side surface. A suction port is formed on the first side surface, the second side surface, and the third side surface of the casing. When the fan is operated, the air taken in through the suction ports formed on the first side surface, the second side surface, and the third side surface of the casing passes through the heat exchanger.

  In the heat source unit of the air conditioner of the third aspect, since air is taken in from a plurality of side surfaces of the casing, it is easy to secure the amount of air supplied to the heat exchanger.

  The heat source unit of the air conditioner of the fourth aspect is the heat source unit of the air conditioner of any of the first aspect to the third aspect, and the heat exchanger includes the first heat exchange section and the second heat exchange section. And a curved third heat exchange section disposed between the two. The first heat exchange section, the third heat exchange section, and the second heat exchange section of the heat exchanger are continuous.

  In the heat source unit of the air conditioner of the fourth aspect, the space between the first heat exchange section and the second heat exchange section can also be effectively used for heat exchange.

  The heat source unit of the air conditioner of the fifth aspect is the heat source unit of the air conditioner of any of the first aspect to the fourth aspect, and comprises a first heat exchange section, a second heat exchange section, and a first heat exchange section. A straight line connecting the ends of the exchange section and the second heat exchange section on the proximal side of each other, and a straight line connecting the ends of the first heat exchange section and the second heat exchange section on the distal side of each other. At least a part of the fan motor that drives the fan is located inside the figure surrounded by.

  In the heat source unit of the air conditioner of the fifth aspect, the space generated by arranging the first heat exchange section and the second heat exchange section so as to form an obtuse angle is effectively used as the installation space of the fan motor. It is easy to downsize the heat source unit.

  The heat source unit of the air conditioner according to the sixth aspect is the heat source unit of the air conditioner according to any one of the first aspect to the fifth aspect, and further includes a compressor that forms a refrigerant circuit of the air conditioner together with the heat exchanger. Prepare The compressor is arranged above or below the heat exchanger.

  Here, by arranging the compressor of the heat source unit above or below the heat exchanger, it is possible to realize a heat source unit having a smaller installation area compared to the case where the compressor and the heat exchanger are installed side by side in the horizontal direction. You can

  The heat source unit of the air conditioner of the seventh aspect is the heat source unit of the air conditioner of any of the first aspect to the sixth aspect, and the fan includes at least a first fan and a second fan.

  Since the heat source unit of the air conditioner of the seventh aspect has a plurality of fans, it is possible to reduce noise by stopping some of the fans when the load is low.

  The heat source unit of the air conditioner of the eighth aspect is the heat source unit of the air conditioner of the seventh aspect, and the first fan and the second fan are arranged side by side vertically.

  In the heat source unit of the air conditioner according to the eighth aspect, by arranging the plurality of fans vertically, it is possible to realize a heat source unit having a smaller installation area than when arranging the plurality of fans horizontally.

  The air conditioner of the ninth aspect is an air conditioner arranged outside the air-conditioned space. The air conditioner has a refrigerant circuit, a heat source side fan, a use side fan, and a casing. The refrigerant circuit includes a compressor, a heat source side heat exchanger, and a use side heat exchanger. The heat source side fan generates an airflow that passes through the heat source side heat exchanger. The usage-side fan generates an airflow that passes through the usage-side heat exchanger. The casing houses the refrigerant circuit, the heat source side fan, and the use side fan. The heat source side heat exchanger includes a first heat exchange section and a second heat exchange section. The heat source side fan is arranged on the leeward side in the first airflow direction, which is the direction of the airflow generated by the heat source side fan, with respect to the heat source side heat exchanger. The casing has a first side surface that faces the windward side of the heat source side heat exchanger in the first air flow direction. The first heat exchange unit has a first plane on the windward side in the first airflow direction. The second heat exchange unit has a second plane on the windward side in the first airflow direction. The angle formed by the first plane and the second plane is an obtuse angle.

It is a schematic perspective view of an air conditioning system concerning one embodiment. It is a schematic perspective left side view in an example of the installation state of the air conditioning system of FIG. It is the schematic of the refrigerant circuit which the air conditioning apparatus of the air conditioning system of FIG. 1 has. It is a block diagram of the air conditioning system of FIG. It is a schematic plan view of the heat source side space of the heat source unit of the air conditioning apparatus of the air conditioning system of FIG. It is a schematic plan view of the heat source side space of the heat source unit of the air conditioning apparatus of the air conditioning system of the modification A.

  An air conditioning system 1 including an air conditioning apparatus 100 and a heat source unit 102 of the air conditioning apparatus 100 according to an embodiment will be described below with reference to the drawings.

  In the following, expressions such as “top”, “bottom”, “front (front)”, “rear (back)”, “left”, “right” may be used to describe the position and direction. Unless otherwise specified, these expressions follow the directions of arrows of “up”, “down”, “front”, “rear”, “left”, and “right” shown in the drawings.

(1) Overall Outline An overall outline of the air conditioning system 1 will be described with reference to FIGS. 1 to 4. FIG. 1 is a schematic perspective view of an air conditioning system 1. FIG. 2 is a schematic perspective left side view in an example of the installation state of the air conditioning system 1. FIG. 3 is a schematic diagram of the refrigerant circuit 10 included in the air conditioning apparatus 100 of the air conditioning system 1. FIG. 4 is a block diagram of the air conditioning system 1.

  The air conditioning system 1 is a device that performs cooling, dehumidification, and heating of the air conditioning target space S1 by using a vapor compression refrigeration cycle performed in the refrigerant circuit 10 of the air conditioning device 100. That is, the air conditioning system 1 has an operation mode including a cooling operation mode for cooling the air conditioning target space S1, a dehumidification operation mode for dehumidifying the air conditioning target space S1, and a heating operation mode for heating the air conditioning target space S1. Have as. Although not limited, the refrigerant used in the air conditioning apparatus 100 is, for example, an HFC-based refrigerant containing R32.

  The air conditioning system 1 is not limited to an apparatus that can perform all of cooling, dehumidification, and heating. For example, the air conditioning system 1 may be a dedicated cooling machine that can perform only cooling / dehumidifying. Further, for example, the air conditioning system 1 may be a dedicated heating machine that can perform only heating. In addition, when the air conditioning system 1 is a cooling-only machine, the air conditioning system 1 does not need to have the flow direction switching mechanism 30 mentioned later. Further, even when the air conditioning system 1 is a heating-only machine, the air conditioning system 1 may not have the flow direction switching mechanism 30. However, if the air conditioning system 1 performs a reverse cycle defrost operation for defrosting the heat source side heat exchanger 40 described later, it is preferable to have the flow direction switching mechanism 30.

  The air conditioning system 1 includes an air conditioning apparatus 100, an intake / blowing unit 200, a controller 90 that controls operations of various components of the air conditioning apparatus 100 and the intake / blowing unit 200 that form the air conditioning system 1, (See FIG. 1 and FIG. 4). The intake / blowing unit 200 is a unit that sucks air in the air conditioning target space S1 and sends the air to the air conditioning apparatus 100, and blows out air cooled or heated by the refrigerant in the air conditioning apparatus 100 to the air conditioning target space S1. The air conditioner 100 is an integrated air conditioner having a heat source unit 102 and a utilization unit 104. The air conditioner 100 includes the refrigerant circuit 10, cools or heats the air in the air-conditioned space S1 sent from the suction / blowing unit 200, and sends the air to the suction / blowing unit 200.

  The air conditioner 100 and the suction / blowing unit 200 are connected by a suction side duct 260 and a blowing side duct 250. The suction-side duct 260 and the outlet-side duct 250 are respectively inserted into, for example, holes formed in a wall W partitioning the air-conditioning target space S1 and an air-conditioning apparatus installation space S2 described below, and one end of the air-conditioning apparatus 100, The other end is connected to the suction / blowing unit 200. The suction side duct 260 transfers the air in the air conditioning target space S1 sucked from the suction port 220 formed in the main body 270 of the suction / blowing unit 200 described later to the use side heat exchanger 50 of the air conditioner 100 described later. It is an air passage for sending. The blow-out duct 250 is an air passage for sending the air that has passed through the use-side heat exchanger 50 of the air conditioner 100 to the intake / blowing unit 200.

  In addition, in this embodiment, although the suction side duct 260 and the blowing side duct 250 are respectively independent, it is not limited to this. For example, the air conditioner 100 and the intake / blowing unit 200 may be connected by a single duct pipe. The inside of the single duct pipe is an air passage for sending the air in the air-conditioned space S1 sucked from the suction port 220 formed in the main body 270 to the use-side heat exchanger 50 of the air conditioner 100. (Corresponding to the suction side duct 260) and an air passage (corresponding to the blowing side duct 250) for sending the air that has passed through the use side heat exchanger 50 to the suction / blowing unit 200, may be partitioned. .

  The suction / blowing unit 200 is installed on the wall W of the air conditioning target space S1 (see FIG. 2). The suction / blowing unit 200 mainly has a main body 270 (see FIG. 1). The main body 270 is formed with a suction port 220 for sucking air in the air conditioning target space S1 and an air outlet 210 for blowing air into the air conditioning target space S1 (see FIGS. 1 and 2).

  The air conditioner 100 is arranged in a space outside the air conditioning target space S1 (referred to as an air conditioner installation space S2) (see FIG. 2). Although not limited, the air conditioner installation space S2 in which the air conditioner 100 is installed is, for example, outdoors. In order to suppress the duct lengths of the suction side duct 260 and the blowing side duct 250 (see FIG. 2) that connect the air conditioning apparatus 100 and the suction / blowing unit 200, it is preferable that the air conditioning apparatus 100 is configured as shown in FIG. As described above, the suction / blowing unit 200 installed in the air conditioning target space S1 is arranged adjacent to the wall W with the wall W interposed therebetween. By suppressing the duct lengths of the suction side duct 260 and the blowing side duct 250, it is possible to suppress an increase in pressure loss when the air passes through the suction side duct 260 and the blowing side duct 250. The casing 110 of the air conditioner 100 is arranged such that the back surface 112 of the casing 110 faces the wall W. From the viewpoint of suppressing the installation space, it is preferable that the casing 110 is arranged so that the back surface 112 of the casing 110 is as close to the wall W as possible. However, in order to suck air from the heat source side suction port 110a formed on the back surface 112, it is preferable that the back surface 112 and the wall W of the casing 110 are installed apart from each other by, for example, 30 to 100 mm. When importance is attached to the suppression of the installation space, the back surface 112 of the casing 110 and the wall W are preferably installed, for example, 30 to 60 mm apart.

  The air conditioner 100 has a refrigerant circuit 10 that performs a vapor compression refrigeration cycle using the air in the air conditioner installation space S2 as a heat source (see FIG. 3).

  The air conditioning apparatus 100 also includes a usage-side fan 70 that generates an airflow that passes through the usage-side heat exchanger 50 included in the refrigerant circuit 10 (see FIGS. 1 and 3). The suction port 220 of the suction / blowing unit 200 communicates with the space A1 (see FIG. 2) on the windward side of the usage-side heat exchanger 50 in the direction of the air flow generated by the usage-side fan 70. Specifically, the suction port 220 of the suction / blowing unit 200 has a space A1 (FIG. 2) on the windward side of the usage-side heat exchanger 50 in the direction of the air flow generated by the usage-side fan 70 via the suction-side duct 260. Refer to)). The outlet 210 of the intake / blowing unit 200 communicates with the space A2 on the leeward side of the usage-side heat exchanger 50 in the direction of the air flow generated by the usage-side fan 70. Specifically, the air outlet 210 of the intake / blowing unit 200 has a space A2 (FIG. 2) on the leeward side of the usage-side heat exchanger 50 in the direction of the air flow generated by the usage-side fan 70 via the outlet-side duct 250. Refer to)). When the usage-side fan 70 is operated, the air in the air-conditioned space S1 is sucked from the suction port 220 of the suction / blowing unit 200, passes through the suction-side duct 260 and the space A1, and is transferred to the usage-side heat exchanger 50. It is sent and exchanges heat with the refrigerant in the use side heat exchanger 50. The air that has exchanged heat with the refrigerant in the use-side heat exchanger 50 passes through the space A2 and the outlet-side duct 250, and finally is blown out from the outlet 210 of the intake / blowing unit 200 into the air conditioning target space S1.

  The air conditioning apparatus 100 also includes a heat source side fan 60 that generates an airflow that passes through the heat source side heat exchanger 40 included in the refrigerant circuit 10. The air conditioning apparatus 100 also includes a casing 110 that houses the refrigerant circuit 10, the usage-side fan 70, and the heat-source-side fan 60. Although not limited in shape, the casing 110 has a substantially rectangular parallelepiped shape. The casing 110 has a back surface 112 as an example of a first side surface, a right side surface 114 as an example of a second side surface, a left side surface 116 as an example of a third side surface, and a front surface 118 as side surfaces. In the casing 110, a heat source side inlet 110a for sucking the air in the air conditioner installation space S2 into the casing 110, and air taken in from the heat source side inlet 110a and passing through the heat source side heat exchanger 40 are air conditioners. The heat source side outlet 110b which blows out to the installation space S2 is formed. When the heat source side fan 60 is operated, the air in the air conditioner installation space S2 is taken into the casing 110 from the heat source side inlet 110a, and the air taken in from the heat source side inlet 110a is transferred to the heat source side heat exchanger 40. And is blown out from the heat source side outlet 110b to the air conditioner installation space S2.

  The controller 90 includes, for example, an air conditioner side controller (not shown) included in the air conditioner 100 and an intake / blowing unit side controller (not shown) included in the intake / blowing unit 200. The air conditioner side control device and the intake / blowing unit side control device work together as a control device 90.

(2) Detailed Description The air conditioner 100, the suction / blowing unit 200, and the control device 90 will be described in detail below.

(2-1) Air Conditioner The refrigerant circuit 10, the heat source side fan 60, the use side fan 70, and the casing 110, which the air conditioner 100 mainly has, will be described.

  The air conditioning apparatus 100 is an integrated unit. The air conditioner 100 being integrated means that the casing 110 accommodates the refrigerant circuit 10, the heat source side fan 60, and the use side fan 70. Note that the casing 110 accommodates the refrigerant circuit 10, the heat source side fan 60, and the use side fan 70, which means that the refrigerant circuit 10, the heat source side fan 60, and the use side fan 70 are partially exposed to the outside of the casing 110. It does not exclude the state of doing. In other words, the air conditioner 100 being integrated means that the casing 110 accommodates both the heat source unit 102 and the utilization unit 104 of the air conditioner.

  It should be noted that the air conditioner 100 is preferably an integrated type from the viewpoint of reducing the on-site piping work, but the air conditioner 100 is not limited to the integrated type. For example, in the air conditioner 100, the heat source unit 102 and the utilization unit 104 may be housed in separate casings, and the heat source unit 102 and the utilization unit 104 may be connected by a refrigerant communication pipe.

  In the present embodiment, the air conditioning apparatus 100 has an air conditioning apparatus side control device (not shown) that constitutes a part of the control device 90. However, in the description of the air conditioner 100, the description of the air conditioner side control device is omitted, and the air conditioner side control device will be described in the description of the control device 90.

(2-1-1) Refrigerant Circuit The air conditioning apparatus 100 is a refrigerant in which devices such as the compressor 20, the flow direction switching mechanism 30, the use side heat exchanger 50, the heat source side heat exchanger 40, and the expansion mechanism 80 are connected by piping. It has a circuit 10 (see FIG. 3).

  First, the connection of devices in the refrigerant circuit 10 will be described. The air conditioning system 1 mainly includes an intake pipe 10a, a discharge pipe 10b, a first gas communication pipe 10c, a liquid communication pipe 10d, and a second gas communication pipe 10e as pipes that connect devices that form the refrigerant circuit 10. Including (see FIG. 3).

  The suction pipe 10a connects the flow direction switching mechanism 30 and a suction-side pipe connection portion (not shown) of the compressor 20. The discharge pipe 10b connects a pipe connection portion (not shown) on the discharge side of the compressor 20 and the flow direction switching mechanism 30. The first gas communication pipe 10c connects the flow direction switching mechanism 30 and the gas side refrigerant inlet / outlet of the heat source side heat exchanger 40. The liquid communication pipe 10d connects the liquid side refrigerant inlet / outlet of the heat source side heat exchanger 40 and the liquid side refrigerant inlet / outlet of the usage side heat exchanger 50. The second gas communication pipe 10e connects the gas-side refrigerant inlet / outlet of the usage-side heat exchanger 50 and the flow direction switching mechanism 30.

  Next, the compressor 20, the flow direction switching mechanism 30, the heat source side heat exchanger 40, the use side heat exchanger 50, and the expansion mechanism 80 will be described.

(2-1-1-1) Compressor The compressor 20 is a device which compresses a refrigerant. The compressor 20 compresses the low pressure refrigerant in the refrigeration cycle and pressurizes it to the high pressure in the refrigeration cycle.

  The compressor 20 is not limited in type, but is, for example, a rotary or scroll type positive displacement compressor. The compression mechanism (not shown) of the compressor 20 is driven by a motor (not shown). The compressor 20 may be a constant capacity compressor (non-inverter compressor) or a variable capacity compressor (inverter compressor).

(2-1-1-2) Flow Direction Switching Mechanism The flow direction switching mechanism 30 switches the flow direction of the refrigerant discharged from the compressor 20 to change the operating state of the air conditioning system 1 to the first operating state and the second operating state. It is a mechanism that switches between operating states. In the first operating state, the use-side heat exchanger 50 functions as an evaporator, and the heat-source-side heat exchanger 40 functions as a condenser (radiator). In the second operating state, the use-side heat exchanger 50 functions as a condenser (radiator) and the heat-source-side heat exchanger 40 functions as an evaporator.

  The flow direction switching mechanism 30 switches the operating state of the air conditioning system 1 to the first operating state during the cooling / dehumidifying operation. Specifically, during the cooling / dehumidifying operation, the flow direction switching mechanism 30 connects the suction pipe 10a to the second gas communication pipe 10e and the discharge pipe 10b to the first gas communication pipe 10c (flow direction switching in FIG. 3). See the solid line in mechanism 30). That is, the flow direction switching mechanism 30 allows the suction side of the compressor 20 to communicate with the gas side end of the usage side heat exchanger 50 through the suction pipe 10a and the second gas communication pipe 10e during the cooling / dehumidifying operation, and the compressor. The discharge side of 20 is connected to the gas side end of the heat source side heat exchanger 40 through the discharge pipe 10b and the first gas communication pipe 10c.

  The flow direction switching mechanism 30 switches the operating state of the air conditioning system 1 to the second operating state during the heating operation. Specifically, during the heating operation, the flow direction switching mechanism 30 connects the suction pipe 10a to the first gas communication pipe 10c and the discharge pipe 10b to the second gas communication pipe 10e (the flow direction switching mechanism 30 of FIG. 3). (Refer to the broken line inside). That is, the flow direction switching mechanism 30 causes the suction side of the compressor 20 to communicate with the gas side end of the heat source side heat exchanger 40 through the suction pipe 10a and the first gas communication pipe 10c during the heating operation, and The discharge side is communicated with the gas side end of the usage side heat exchanger 50 through the discharge pipe 10b and the second gas communication pipe 10e.

  In this embodiment, the flow direction switching mechanism 30 is a four-way switching valve. However, the flow direction switching mechanism 30 is not limited to the four-way switching valve, and may be configured to combine a plurality of electromagnetic valves and a refrigerant pipe so as to realize the switching of the refrigerant flow direction as described above.

(2-1-1-3) Heat Source Side Heat Exchanger The heat source side heat exchanger 40 is a heat exchanger that performs heat exchange between the refrigerant and the air in the air conditioner installation space S2. A liquid communication pipe 10d is connected to the liquid side end of the heat source side heat exchanger 40, and a first gas communication pipe 10c is connected to the gas side end of the heat source side heat exchanger 40 (see FIG. 3). . When the operating state of the air conditioning system 1 is in the first operating state, the heat source side heat exchanger 40 functions as a condenser. When the operating state of the air conditioning system 1 is in the second operating state, the heat source side heat exchanger 40 functions as an evaporator.

  Although the structure of the heat source side heat exchanger 40 is not limited, for example, a refrigerant heat transfer tube 40a through which a refrigerant flows, which is supported by a tube plate (not shown), and a large number of heat transfer fins 40b. Is a fin-and-tube heat exchanger mainly having, (see FIG. 5). The heat source side heat exchanger 40 is arranged in the casing 110 in such a posture that a tube plate (not shown) extends vertically and the refrigerant heat transfer tube 40a extends horizontally. In the heat source side heat exchanger 40, a plurality of refrigerant heat transfer tubes 40a are vertically arranged. For example, in the heat source side heat exchanger 40, the refrigerant heat transfer tubes 40a are arranged in 32 stages in the vertical direction. Further, in the heat source side heat exchanger 40, a plurality of stages of the refrigerant heat transfer tubes 40a are arranged side by side in a plurality of rows, for example, two rows in the direction of the air flow generated by the heat source side fan 60. Note that the number of stages and the number of rows of the refrigerant heat transfer tubes 40a are merely examples, and the number of stages and the number of rows are not limited thereto. For example, the number of rows of the refrigerant heat transfer tubes 40a may be one, or may be three or more. Further, the number of stages of the refrigerant heat transfer tubes 40a may be larger or smaller than the exemplified number of stages. However, in order to realize the air conditioner 100 having a small installation area, the number of stages of the refrigerant heat transfer tubes 40a is preferably designed to be relatively large.

  A portion of the heat source side heat exchanger 40, which is constituted by the refrigerant heat transfer tube 40a and the heat transfer fins 40b, and in which heat is exchanged between the refrigerant and the air flowing inside the refrigerant heat transfer tube 40a is referred to as a heat exchange section 41. . The heat exchange section 41 of the heat source side heat exchanger 40 includes a first heat exchange section 42, a second heat exchange section 44, and a third heat exchange section 46.

  The first heat exchange portion 42 is a portion where the refrigerant heat transfer tube 40a linearly extends rearward leftward from the one end 41a (right end) of the heat exchange portion 41 in a plan view. The second heat exchange portion 44 is a portion where the refrigerant heat transfer tube 40a linearly extends rearward from the other end 41b (left end) of the heat exchange portion 41 in the plan view. The third heat exchange section 46 is arranged between the first heat exchange section 42 and the second heat exchange section 44. The third heat exchange section 46 is curved in a plan view. That is, in the third heat exchange section 46, the refrigerant heat transfer tube 40a is curved. In the heat source side heat exchanger 40, the first heat exchange section 42, the third heat exchange section 46, and the second heat exchange section 44 are continuous. Although the manufacturing method is not limited, the heat source side heat exchanger 40 is manufactured by bending an intermediate portion (a portion that becomes the third heat exchange portion 46) of the linearly extending refrigerant heat transfer tube 40a by bending. It By bending the intermediate portion of the linearly extending refrigerant heat transfer tube 40a, the refrigerant heat transfer tube 40a extends linearly in the first heat exchange section 42 and the second heat exchange section 44 in a plan view, and the third heat exchange section At 46, the refrigerant heat transfer tube 40a is formed in a curved shape. Preferably, the heat source side heat exchanger 40 is manufactured by being curved near the center of the linearly extending refrigerant heat transfer tube 40a (near the center of the end portion 41a and the end portion 41b).

  In the heat source side heat exchanger 40, the angle α (see FIG. 5) formed by the first plane F1 of the first heat exchange section 42 and the second plane F2 of the second heat exchange section 44 is an obtuse angle. That is, the angle α is larger than 90 degrees and smaller than 180 degrees. Preferably, the angle α is greater than 105 degrees and less than 165 degrees. More preferably, the angle α is greater than 110 degrees and less than 150 degrees. In addition, here, the first plane F1 of the first heat exchange unit 42 is, when facing the first heat exchange unit 42, the windward side (here, the rear side) in the direction D1 of the air flow generated by the heat source side fan 60. It is a plane arranged in (see FIG. 5). In addition, here, the second plane F2 of the second heat exchange unit 44, when facing the second heat exchange unit 44, is the windward side (here, the rear side) in the direction D1 of the air flow generated by the heat source side fan 60. It is a plane arranged in (see FIG. 5).

  The heat source side heat exchanger 40 is preferably arranged in the casing 110 such that a portion arranged outside the bent portion of the heat exchange portion 41 is closest to the back surface 112 of the casing 110. In other words, in the heat source side heat exchanger 40, the outer side of the bent portion of the third heat exchange section 46 is arranged closest to the back surface 112 of the casing 110, and the third heat exchange section 46 to the first heat exchange section 42 are on the right. It is preferable that the second heat exchange portion 44 is arranged in the casing 110 so as to extend to the front left side from the third heat exchange portion 46 so as to extend forward (see FIG. 5). That is, the heat source side heat exchanger 40 is a casing such that the first plane F1 of the first heat exchange section 42 and the second plane F2 of the second heat exchange section 44 intersect the back surface 112 of the casing 110 in a plan view. It is preferably located within 110. By disposing the heat source side heat exchanger 40 in the casing 110 in this way, it is easy to realize a slim casing 110 in which the width of the back surface 112 (that is, the length of the casing 110 in the left-right direction) is suppressed. Further, by disposing the heat source side heat exchanger 40 in the casing 110 in this way, as will be described later, not only from the rear surface 112 side of the casing 110 but also to the rear side of the right side surface 114 and the left side surface 116 of the casing 110. It is easy to supply a sufficient amount of air to the heat source side heat exchanger 40 also from the heat source side suction port 110a arranged on the side.

(2-1-1-4) Utilization-side Heat Exchanger The utilization-side heat exchanger 50 performs heat exchange between the refrigerant and the air sent from the suction / blowing unit 200 via the suction-side duct 260. It is a heat exchanger. A liquid communication pipe 10d is connected to the liquid side end of the utilization side heat exchanger 50, and a second gas communication pipe 10e is connected to the gas side end of the utilization side heat exchanger 50 (see FIG. 3). . When the operating state of the air conditioning system 1 is in the first operating state, the utilization side heat exchanger 50 functions as an evaporator. When the operating state of the air conditioning system 1 is in the second operating state, the use side heat exchanger 50 functions as a condenser.

  Although the structure of the use side heat exchanger 50 is not limited, the use side heat exchanger 50 mainly includes, for example, a refrigerant heat transfer tube (not shown) through which a refrigerant flows and a large number of heat transfer fins (not shown). It is a fin-and-tube heat exchanger that has. The usage-side heat exchanger 50 has a substantially flat plate-shaped heat exchange section configured by a refrigerant heat transfer tube (not shown) and heat transfer fins (not shown) (see FIG. 1).

(2-1-1-5) Expansion Mechanism The expansion mechanism 80 is a mechanism that reduces the pressure of the high-pressure refrigerant in the refrigeration cycle due to the throttling expansion action. In this embodiment, the expansion mechanism 80 is an electronic expansion valve. However, the expansion mechanism 80 is not limited to an electronic expansion valve whose opening degree can be adjusted, and may be a mechanical expansion valve used together with a heat-sensitive cylinder. Further, the expansion mechanism 80 may be a capillary tube.

(2-1-2) Heat Source Side Fan The heat source side fan 60 is a device that generates an airflow that passes through the heat source side heat exchanger 40. The heat source side fan 60 is driven by a fan motor 62. In the direction D1 of the air flow generated by the heat source side fan 60, the heat source side fan 60 is arranged on the lee side of the heat source side heat exchanger 40 (see FIG. 2). The direction D1 is an example of the first airflow direction.

  When the heat source side fan 60 is operated, the air in the air conditioner installation space S2 is sucked into the casing 110 through the heat source side inlet 110a formed in the casing 110. The air sucked into the casing 110 from the heat source side inlet 110a passes through the heat source side heat exchanger 40 and is blown out from the heat source side outlet 110b to the air conditioner installation space S2.

  The heat source side fan 60 is a propeller fan in this embodiment. In the present embodiment, the air conditioning apparatus 100 includes two fans (first fan 60a and second fan 60b). The first fan 60a and the second fan 60b are arranged side by side vertically. The height of the heat source side heat exchanger 40 is set relatively large, and the first fan 60a and the second fan 60b are vertically arranged side by side, whereby the width of the casing 110 in the lateral direction (horizontal direction) is suppressed. At the same time, it is possible to cope with a relatively large heat load. Further, since the air conditioner 100 includes two fans (the first fan 60a and the second fan 60b) here, it is possible to reduce the noise by stopping the one fan when the heat load is low. .

  However, the type and the number of the heat source side fans 60 are not limited to the illustrated embodiment. The type and number of the heat source side fans 60 may be appropriately determined as long as the flow of the air passing through the heat source side heat exchanger 40 described above can be generated and a desired air volume can be secured.

  That is, the heat source side fan 60 may be a fan other than the propeller fan. For example, the heat source side fan 60 may be a cross flow fan. Although the installation state is not limited, when the heat-source side fan 60 is a cross-flow fan, the cross-flow fan suppresses the wall of the casing 110 in the left-right direction, and therefore, the rotation shaft of the impeller of the cross-flow fan. Is preferably installed in the casing 110 in such a posture that the is extended in the vertical direction.

  The heat source side fan 60 may include only one fan or three or more fans.

  It should be noted that the fan motor 62 of the heat source side fan 60 (the fan motor 62a of the first fan 60a and the fan motor 62b of the second fan 60b) has at least a part of the first fan motor 62 of the heat source side heat exchanger 40 in plan view. It is preferably arranged inside the space surrounded by the heat exchange section 42 and the second heat exchange section 44. This will be specifically described.

  In a plan view, an end portion of the first heat exchange portion 42 on the proximal side with respect to the second heat exchange portion 44 (a central portion in the row direction of the end portion on the side connected to the third heat exchange portion 46), An imaginary straight line connecting the end of the second heat exchange section 44 on the proximal side with respect to the first heat exchange section 42 (the central portion in the row direction of the end on the side connected to the third heat exchange section 46) Is called a straight line L1 (see FIG. 5). The distal end of the first heat exchange part 42 with respect to the second heat exchange part 44 (the central part in the row direction of the end part 41a of the heat exchange part 41) and the first heat of the second heat exchange part 44 An imaginary straight line connecting the end portion on the distal side with respect to the exchange portion 42 (the central portion in the row direction of the end portion 41b of the heat exchange portion 41) is called a straight line L2 (see FIG. 5). Then, in a plan view, the first heat exchange section 42, the second heat exchange section 44, and the straight line L1 connecting the ends of the first heat exchange section 42 and the second heat exchange section 44 on the proximal side of each other. And a figure Z surrounded by a straight line L2 connecting the distal ends of the first heat exchange section 42 and the second heat exchange section 44. It is preferable that at least a part of the fan motor 62a and the fan motor 62b be located inside the virtual figure Z in a plan view. By disposing the fan motor 62a and the fan motor 62b at such positions, it is possible to effectively utilize the space and suppress the size of the casing. It should be noted that the structure in which at least a part of the fan motor is arranged inside the virtual figure Z in plan view is useful for suppressing the size of the casing 110 regardless of the type of the fan 60.

(2-1-3) Utilization-side Fan The utilization-side fan 70 is a device that generates an airflow that passes through the utilization-side heat exchanger 50. The utilization side fan 70 is driven by a motor (not shown).

  When the usage-side fan 70 is operated, the air in the air-conditioned space S1 is sucked from the suction port 220 of the suction / blowing unit 200, passes through the suction-side duct 260 and the space A1, and is transferred to the usage-side heat exchanger 50. It is sent and exchanges heat with the refrigerant in the use side heat exchanger 50. Then, the air that has exchanged heat with the refrigerant in the use-side heat exchanger 50 passes through the space A2 and the outlet-side duct 250, and finally blows out from the outlet 210 of the intake / blowing unit 200 to the air-conditioned space S1. .

  The use side fan 70 is one sirocco fan in this embodiment. However, the type and the number of the use-side fans 70 are not limited to the illustrated mode. The type and number of the use-side fans 70 may be appropriately determined as long as the flow of the air passing through the use-side heat exchanger 50 described above can be generated and a desired air volume can be secured. The type of the usage-side fan 70 may be appropriately determined as long as the flow of air passing through the usage-side heat exchanger 50 described above can be generated. The use side fan 70 may include a plurality of sirocco fans.

  Further, in the present embodiment, the usage-side fan 70 is arranged upstream of the usage-side heat exchanger 50 in the direction of the air flow generated by the usage-side fan 70, but the invention is not limited to this. The usage-side fan 70 may be arranged downstream of the usage-side heat exchanger 50 in the direction of the air flow generated by the usage-side fan 70 depending on the design of the air flow path or the like.

(2-1-4) Casing The casing 110 houses the refrigerant circuit 10, the heat source side fan 60, and the utilization side fan 70. Note that the casing 110 accommodates the refrigerant circuit 10, the heat source side fan 60, and the use side fan 70, which means that the refrigerant circuit 10, the heat source side fan 60, and the use side fan 70 are partially exposed to the outside of the casing 110. The state (for example, a state in which a part of the piping of the refrigerant circuit 10 is attached to the outer surface of the casing 110) is not excluded.

  The casing 110 is installed on the floor of the air conditioner installation space S2. However, the manner of installing the casing 110 is not limited to floor placement, and for example, the casing 110 may be fixed and supported by the adjacent wall.

  In the casing 110, a heat source side inlet 110a for sucking the air in the air conditioner installation space S2 into the casing 110, and air sucked from the heat source side inlet 110a and passing through the heat source side heat exchanger 40 are air conditioners. A heat source side outlet 110b that blows out to the installation space S2 is formed. The heat source side suction port 110a is formed on the back surface 112 of the casing 110, the rear portion of the right side surface 114 of the casing 110, and the rear portion of the left side surface 116 of the casing 110. The right side surface 114 and the left side surface 116 extend from both ends of the back surface 112 as an example of the first side surface so as to intersect with the back surface 112 (particularly here, extend substantially vertically), and the second side surface and the third side surface. This is an example. The heat source side outlet 110b is formed on the front surface 118 of the casing 110. When the heat source side fan 60 is operated, the air taken in through the heat source side inlet 110a formed on the back surface 112, the right side surface 114 and the left side surface 116 passes through the heat exchange section 41 of the heat source side heat exchanger 40. After that, it is blown out from the heat source side outlet 110b.

  Next, the arrangement of devices in the casing 110 will be described.

  The inside of the casing 110 is arranged in the vertical direction in the middle between the heat source side space Sa arranged at the lowermost portion, the use side space Sc arranged at the top, and the heat source side space Sa and the use side space Sc. It is divided into three spaces, a machine room space Sb (see FIGS. 1 and 2). In addition, it is preferable that the heat source side space Sa, the machine room space Sb, and the use side space Sc are partitioned in such a state that there is no direct inflow / outflow of air between these spaces.

  The heat source side space Sa and the machine room space Sb form the heat source unit 102 of the air conditioning apparatus 100. In other words, in the heat source side space Sa and the machine room space Sb, main devices and parts (heat source side heat exchanger 40, heat source side fan 60, and compressor 20) that configure the heat source unit 102 are arranged. Further, the flow direction switching mechanism 30 and the expansion mechanism 80 that configure the heat source unit 102 may be arranged in the heat source side space Sa and the machine room space Sb. The usage side space Sc constitutes the usage unit 104 of the air conditioning apparatus 100. In other words, in the use side space Sc, main devices and parts (use side heat exchanger 50 and use side fan 70) that configure the use unit 104 are arranged.

  The heat source side heat exchanger 40 and the heat source side fan 60 are mainly arrange | positioned in the heat source side space Sa (refer FIG.1 and FIG.2). In the casing 110, a heat source side inlet 110a and a heat source side outlet 110b are formed so as to communicate with the heat source side space Sa. The heat source side suction port 110a is formed on the back surface 112, the right side surface 114, and the left side surface 116 of the casing 110. The heat source side outlet 110b is formed on the front surface 118 of the casing 110.

  The compressor 20 is mainly arranged in the machine room space Sb. The compressor 20 is arranged above the heat source side space Sa in which the heat source side heat exchanger 40 is arranged.

  The usage-side heat exchanger 50 and the usage-side fan 70 are mainly arranged in the usage-side space Sc (see FIGS. 1 and 2). The use side space Sc is further divided in the vertical direction, and the use side fan 70 is arranged in the lower space Sca, and the use side heat exchanger 50 is arranged in the upper space Scb (see FIGS. 1 and 2). . In the casing 110, a use side suction port 110c to which the suction side duct 260 is connected is formed so as to open to the space Sca (see FIG. 2). Further, the casing 110 is formed with a use-side outlet 110d to which the outlet duct 250 is connected so as to open to the space Scb (see FIG. 2). The use-side suction port 110c and the use-side outlet 110d are formed on the front surface 118 of the casing 110. When the usage-side fan 70 is driven, air flows in from the usage-side suction port 110c through the suction-side duct 260, is blown upward by the usage-side fan 70, and is arranged in the space Scb. Head to vessel 50. The air headed from the usage-side fan 70 to the usage-side heat exchanger 50 passes through the usage-side heat exchanger 50 and flows into the outlet-side duct 250 from the usage-side outlet 110d.

  Note that the arrangement of the devices and spaces inside the casing 110 shown here is merely an example, and may be changed as appropriate. For example, the order in which the heat source side space Sa, the machine room space Sb, and the use side space Sc are arranged in the vertical direction may be appropriately changed. For example, inside the casing 110, the space may be arranged in the order of the machine room space Sb, the heat source side space Sa, and the use side space Sc from below. In this case, the compressor 20 is arranged below the heat source side space Sa in which the heat source side heat exchanger 40 is arranged.

  Further, in the present embodiment, the heat source side space Sa, the machine room space Sb, and the use side space Sc are arranged side by side in the vertical direction, but the heat source side space Sa, the machine room space Sb, and the use side space Sc are in the vertical direction. You don't have to line up. For example, at least a part of the heat source side space Sa, the machine room space Sb, and the use side space Sc may be arranged side by side in the left-right direction. However, the installation area of the casing 110 can be suppressed by arranging the heat source side space Sa, the machine room space Sb, and the use side space Sc side by side in the vertical direction.

  In addition, in the present embodiment, the equipment and components configuring the heat source unit 102 and the equipment and components configuring the utilization unit 104 are housed in one casing 110, but the present invention is not limited to this, and the heat source unit is not limited thereto. The equipment and components forming 102 and the equipment and components forming the utilization unit 104 may be housed in different casings. In other words, the heat source unit 102 and the utilization unit 104 may be separate units connected to each other by the refrigerant pipes.

(2-2) Intake / Blowout Unit The intake / blowout unit 200 is installed on the wall W of the air conditioning target space S1, sucks air in the air conditioning target space S1, and exchanges heat with the use-side heat exchanger 50 of the air conditioner 100. It is a unit that blows out the generated air to the air conditioning target space S1.

  The suction / blowing unit 200 mainly has a main body 270 (see FIGS. 1 and 2). Also, preferably, the suction / blowing unit 200 has a blowout flap 230 arranged at the blowout opening 210 formed in the main body 270 (see FIGS. 1 and 2). The air outlet flap 230 is a component that changes the direction of the air blown out from the air outlet 210. The outlet flap 230 is driven by a motor (not shown) controlled by the controller 90.

  In addition, in the present embodiment, the suction / blowing unit 200 has a suction / blowing unit side control device (not shown) that constitutes a part of the control device 90. However, in the description of the suction / blowing unit 200, the description of the suction / blowing unit side control device is omitted, and in the description of the control device 90, the suction / blowing unit side control device will be described.

  The main body 270 is a casing having a substantially rectangular parallelepiped shape. However, the shape of the main body 270 is not limited to the rectangular parallelepiped shape, and may be appropriately determined. In the present air conditioning system 1, since the usage-side heat exchanger 50, the usage-side fan 70, the refrigerant pipes that configure the refrigerant circuit 10, and the like are all arranged in the air conditioning apparatus 100, the depth of the main body 270 (the front-rear direction) Thickness) is suppressed. For example, by disposing the refrigerant circuit 10 in the air conditioner 100, the depth of the main body 270 can be suppressed within the range of 10 mm to 250 mm, and the slim suction / blowing unit 200 can be realized.

  The interior of the main body 270 is divided into an upper space C1 and a lower space C2 by a partition member 280 (see FIG. 2). The partition member 280 prevents the air in the upper space C1 from directly flowing into the lower space C2 by passing through the inside of the main body 270, and the air in the lower space C2 passes through the inside of the main body 270. It is preferable to partition the upper space C1 and the lower space C2 so that the upper space C1 does not directly flow into the upper space C1.

  The main body 270 is formed with an outlet 210 that communicates with the upper space C1. A blowout side opening (not shown) communicating with the blowout side duct 250 is formed on the back surface of the main body 270. The outlet side opening (not shown) is formed in the main body 270 so as to communicate with the upper space C1. When the use-side fan 70 of the air conditioner 100 is operated, the air that has passed through the use-side heat exchanger 50 of the air conditioner 100 passes through the blow-out duct 250 and passes through the blow-out opening (not shown) to the upper space. It flows into C1 and then blows out from the outlet 210. The direction of the air blown from each outlet 210 is adjusted by the outlet flap 230.

  The main body 270 has a suction port 220 communicating with the lower space C2. A suction side opening (not shown) that communicates with the suction side duct 260 is formed on the back surface of the main body 270. The suction side opening (not shown) is formed in the main body 270 so as to communicate with the lower space C2. When the usage-side fan 70 of the air conditioner 100 is operated, the air in the air conditioning target space S1 flows in from the suction port 220 and flows into the suction side duct 260 via the lower space C2.

  It should be noted that the mode of the suction / blowing unit 200 described here is merely an example, and the positions, the numbers, and the like of the suction port 220 and the air outlet 210 may be appropriately changed. The suction / blowing unit 200 may be a ceiling-mounted type instead of a wall-mounted type.

(2-3) Control Device The control device 90 controls the operations of various devices of the air conditioning system 1 such as the air conditioning device 100 and the intake / blowing unit 200. The control device 90 includes, for example, an air conditioner side control device (not shown) included in the air conditioner 100 and an intake / blowing unit side control device (not illustrated) included in the intake / blowing unit 200. The harmony device side control device and the suction / blowing unit side control device cooperate to function as the control device 90. Each of the air conditioner side control device and the intake / blowing unit side control device has a microcomputer having parts such as a CPU and a memory.

  The control device 90 does not have to be configured by the air conditioner side control device and the intake / blowing unit side control device. For example, the control device 90 may be configured only by the air conditioner side control device included in the air conditioner 100, or the control device 90 may be configured only by the intake / blowing unit side control device included in the intake / blowing unit 200. Good. Further, the control device 90 may be an independent device different from the air conditioner side control device included in the air conditioner 100 and the intake / blowing unit side control device included in the intake / blowing unit 200.

  Moreover, the control device 90 of the present embodiment is merely an example of a control device that controls the operation of the air conditioning system 1. The control device may realize the same function as the function of the control device 90 according to the present embodiment by hardware such as a logic circuit or a combination of hardware and software.

  The control device 90 is electrically connected to various devices of the air conditioner 100 including the compressor 20, the flow direction switching mechanism 30, the heat source side fan 60, the use side fan 70, and the expansion mechanism 80 (see FIG. 4). Further, the control device 90 is electrically connected to various devices of the suction / blowing unit 200 including the blowout flap 230 (see FIG. 4). The control device 90 is also electrically connected to a temperature sensor (not shown) provided in each part of the air conditioning system 1. The temperature sensor includes, for example, a temperature sensor that measures the temperature of the refrigerant in each part of the refrigerant circuit 10 and a temperature sensor that measures the temperature of the air conditioning target space S1 and the air conditioner installation space S2. Further, the refrigerant circuit 10 of the air conditioning system 1 may be provided with a pressure sensor for measuring the pressure of the refrigerant. In the microcomputer 90, the control device 90 controls the operation of the air conditioning system 1 by the CPU executing a program stored in the memory.

  The operation of various devices of the air conditioning system 1 during the cooling / dehumidifying operation and the heating operation of the air conditioning system 1 controlled by the controller 90 will be described.

<Cooling / dehumidifying operation>
When a cooling operation or a dehumidifying operation is instructed by an instruction from an operation switch (not shown) or the like, the controller 90 operates the flow direction switching mechanism 30 so that the operation state of the air conditioning system 1 becomes the first operation state. Control (see the solid line in the flow direction switching mechanism 30 in FIG. 3). Further, the control device 90 starts the operation of the compressor 20, the heat source side fan 60, and the use side fan 70, and based on the measured value of the temperature sensor and the like, the compressor 20, the expansion mechanism 80, the heat source side fan 60, and the use side fan 70. The operation of the side fan 70 is appropriately controlled. The controller 90 also controls the outlet flap 230 of the intake / blowing unit 200 as appropriate.

  As a result of controlling the operation of the air conditioning system 1 as described above, the low-pressure gas refrigerant in the refrigeration cycle in the refrigerant circuit 10 is sucked into the compressor 20 and compressed, and becomes high-pressure gas refrigerant in the refrigeration cycle. The gas refrigerant compressed by the compressor 20 is sent to the heat source side heat exchanger 40 through the flow direction switching mechanism 30. The high-pressure gas refrigerant in the refrigeration cycle sent to the heat source side heat exchanger 40 and the heat in the air conditioner installation space S2 supplied by the heat source side fan 60 in the heat source side heat exchanger 40 functioning as a condenser and heat. It is exchanged, cooled, condensed, and becomes a high-pressure liquid refrigerant. On the other hand, the air heated by the heat source side heat exchanger 40 functioning as a condenser is discharged from the heat source side outlet 110b formed in the casing 110 to the air conditioner installation space S2. The liquid refrigerant condensed in the heat source side heat exchanger 40 is decompressed and expanded in the expansion mechanism 80, and is sent to the usage side heat exchanger 50. The low-pressure gas-liquid two-phase refrigerant sent to the usage-side heat exchanger 50 heats the air in the air-conditioned space S1 supplied by the usage-side fan 70 in the usage-side heat exchanger 50 that functions as an evaporator. It exchanges and evaporates to become a low-pressure gas refrigerant. The low-pressure gas refrigerant is sent to the compressor 20 through the second gas communication pipe 10e and the suction pipe 10a, and is sucked into the compressor 20 again. On the other hand, the air cooled by the use side heat exchanger 50 functioning as an evaporator is blown out from the air outlet 210 of the main body 270 of the suction / blowing unit 200.

<Heating operation>
When the heating operation is instructed by an operation switch (not shown) or the like, the control device 90 controls the flow direction switching mechanism 30 so that the operation state of the air conditioning system 1 becomes the second operation state ( (Refer to the broken line in the flow direction switching mechanism 30 of FIG. 3). Further, the control device 90 starts the operation of the compressor 20, the heat source side fan 60, and the use side fan 70, and based on the measured value of the temperature sensor and the like, the compressor 20, the expansion mechanism 80, the heat source side fan 60, and the use side fan 70. The operation of the side fan 70 is appropriately controlled. The control device 90 also controls the outlet flap 230 on the intake / blowing unit 200 side.

  As a result of controlling the operation of the air conditioning system 1 as described above, the low-pressure gas refrigerant in the refrigeration cycle in the refrigerant circuit 10 is sucked into the compressor 20 and compressed, and becomes high-pressure gas refrigerant in the refrigeration cycle. The gas refrigerant compressed by the compressor 20 is sent to the utilization side heat exchanger 50 through the flow direction switching mechanism 30. The high-pressure gas refrigerant in the refrigeration cycle sent to the usage-side heat exchanger 50 exchanges heat with the air in the air-conditioned space S1 supplied by the usage-side fan 70 in the usage-side heat exchanger 50 that functions as a condenser. It cools down, condenses, and becomes a high-pressure liquid refrigerant. On the other hand, the air in the air conditioning target space S1 heated by the utilization side heat exchanger 50 functioning as a condenser blows out from the air outlet 210 of the main body 270 of the suction / blowing unit 200. The liquid refrigerant condensed in the usage-side heat exchanger 50 is decompressed and expanded in the expansion mechanism 80 and sent to the heat source-side heat exchanger 40. The low-pressure gas-liquid two-phase refrigerant sent to the heat source side heat exchanger 40 is the air in the air conditioner installation space S2 supplied by the heat source side fan 60 in the heat source side heat exchanger 40 that functions as an evaporator. And exchanges heat to evaporate and become a low-pressure gas refrigerant. The low-pressure gas refrigerant is sent to the compressor 20 through the first gas communication pipe 10c and the suction pipe 10a and is again sucked into the compressor 20. On the other hand, the air cooled by the heat source side heat exchanger 40 functioning as an evaporator is discharged from the heat source side outlet 110b formed in the casing 110 to the air conditioner installation space S2.

(3) Features (3-1)
The heat source unit 102 of the air conditioner 100 of the present embodiment includes the heat source side heat exchanger 40, the heat source side fan 60, and the casing 110. The heat source side heat exchanger 40 includes a first heat exchange section 42 and a second heat exchange section 44. The heat source side fan 60 generates an air flow passing through the heat source side heat exchanger 40, and is arranged on the leeward side in the air flow direction D1 with respect to the heat source side heat exchanger 40. The casing 110 houses the heat source side heat exchanger 40 and the heat source side fan 60. The casing 110 has a back surface 112, which is an example of a first side surface that faces the windward side of the heat source side heat exchanger 40 in the airflow direction D1. The 1st heat exchange part 42 has the 1st plane F1 of the windward side in the direction D1 of an airflow. The second heat exchange unit 44 has a second plane F2 on the windward side in the airflow direction D1. The angle α formed by the first plane F1 and the second plane F2 is an obtuse angle.

  In the heat source unit 102 of the air conditioner 100 of the first aspect, the same heat exchange capacity can be achieved in the width of the back surface 112 of the casing 110 as compared with the case of using the heat source side heat exchanger 40 formed in a single flat plate shape. It can be realized by the suppressed slim heat source unit 102. Therefore, the heat source unit 102 can be installed even in a relatively narrow space.

(3-2)
In the heat source unit 102 of the air conditioning apparatus 100 of the present embodiment, the first plane F1 and the second plane F2 spread in a direction intersecting the back surface 112 of the casing 110 in a plan view.

  In the heat source unit 102, the heat source side heat exchanger 40 is arranged in the casing 110 such that the first plane F1 and the second plane F2 intersect the back surface 112 of the casing 110, and thus the width of the back surface 112 is suppressed. It is easy to realize the slim heat source unit 102.

(3-3)
In the heat source unit 102 of the air-conditioning apparatus 100 of the present embodiment, the casing 110 includes a right side surface 114 as an example of a second side surface and a left side as an example of a third side surface that extend from both ends of the back surface 112 and intersect the back surface 112. And a surface 116. A heat source side suction port 110a is formed on the back surface 112, the right side surface 114, and the left side surface 116 of the casing 110. When the heat source side fan 60 is operated, the air taken in from the heat source side inlet 110a formed on the back surface 112, the right side surface 114, and the left side surface 116 of the casing 110 passes through the heat source side heat exchanger 40.

  Since the heat source unit 102 takes in air from a plurality of side surfaces of the casing 110, it is easy to secure the amount of air supplied to the heat source side heat exchanger 40.

(3-4)
In the heat source unit 102 of the air conditioner 100 of the present embodiment, the heat source side heat exchanger 40 has the curved third heat exchange section 46 arranged between the first heat exchange section 42 and the second heat exchange section 44. including. The first heat exchange section 42, the third heat exchange section 46, and the second heat exchange section 44 of the heat source side heat exchanger 40 are continuous.

  In the heat source unit 102, the space between the first heat exchange section 42 and the second heat exchange section 44 can be effectively used for heat exchange.

  Further, the heat source side heat exchanger 40 having such a structure is easier to process and assemble than the case where the first heat exchanging section 42 and the second heat exchanging section 44 are independent (discontinuous). Therefore, the manufacturing cost can be reduced.

(3-5)
In the heat source unit 102 of the air conditioner 100 of the present embodiment, the first heat exchange section 42, the second heat exchange section 44, and the first heat exchange section 42 and the second heat exchange section 44 on the proximal side of each other. Inside the figure Z surrounded by the straight line L1 connecting the ends and the straight line L2 connecting the ends on the distal sides of the first heat exchange part 42 and the second heat exchange part 44, the heat source is At least a part of the heat source side fan 60 motor that drives the side fan 60 is located.

  In the heat source unit 102, a space generated by arranging the first heat exchange section 42 and the second heat exchange section 44 so as to form an obtuse angle (sandwiched between the first heat exchange section 42 and the second heat exchange section 44). Space) is effectively used as an installation space for the heat source side fan 60 motor. Therefore, it is easy to downsize the heat source unit 102.

(3-6)
The heat source unit 102 of the air conditioning apparatus 100 of the present embodiment includes the heat source side heat exchanger 40 and the compressor 20 that forms the refrigerant circuit 10 of the air conditioning apparatus 100. The compressor 20 is arranged above or below the heat source side heat exchanger 40.

  Here, by disposing the compressor 20 of the heat source unit 102 above or below the heat source side heat exchanger 40, compared to the case where the compressor 20 and the heat source side heat exchanger 40 are installed side by side in the horizontal direction. The heat source unit 102 having a small area can be realized.

(3-7)
In the heat source unit 102 of the air conditioner 100 of the present embodiment, the heat source side fan 60 includes at least the first fan 60a and the second fan 60b.

  In the present heat source unit 102, since there are a plurality of heat source side fans 60, noise can be reduced by stopping some heat source side fans 60 when the load is low.

(3-8)
In the heat source unit 102 of the air conditioning apparatus 100 of the present embodiment, the first fan 60a and the second fan 60b are arranged side by side vertically.

  In the heat source unit 102, by arranging the plurality of fans 60a and 60b side by side vertically, it is possible to realize the heat source unit 102 having a smaller installation area than when arranging the plurality of fans 60a and 60b side by side in the horizontal direction. .

(3-9)
The air conditioning apparatus 100 of this embodiment is the air conditioning apparatus 100 arranged outside the air conditioning target space S1. The air conditioner 100 includes a refrigerant circuit 10, a heat source side fan 60, a use side fan 70, and a casing 110. The refrigerant circuit 10 includes a compressor 20, a heat source side heat exchanger 40, and a use side heat exchanger 50. The heat source side fan 60 generates an airflow that passes through the heat source side heat exchanger 40. The usage-side fan 70 generates an airflow that passes through the usage-side heat exchanger 50. The casing 110 houses the refrigerant circuit 10, the heat source side fan 60, and the use side fan 70. The heat source side heat exchanger 40 includes a first heat exchange section 42 and a second heat exchange section 44. The heat source side fan 60 is arranged on the lee side of the heat source side heat exchanger 40 in the direction D1 (first air flow direction) of the air flow generated by the heat source side fan 60. The casing 110 has a back surface 112 as an example of a first side surface that faces the windward side in the direction D1 of the heat source side heat exchanger 40. The 1st heat exchange part 42 has the 1st plane F1 of the windward side in the direction D1. The second heat exchange unit has a second plane F2 on the windward side in the direction D1. The angle α formed by the first plane F1 and the second plane F2 is an obtuse angle.

(4) Modified Example Hereinafter, a modified example of the above-described embodiment will be described. The modified examples may be applied in combination as long as they do not conflict with each other.

(4-1) Modification A
In the above-described embodiment, the heat source side heat exchanger 40 includes the first heat exchange section 42, the second heat exchange section 44, and the third heat exchange section that connects the first heat exchange section 42 and the second heat exchange section 44. However, the shape of the heat source side heat exchanger is not limited to such a shape.

  For example, as shown in FIG. 6, the heat source side heat exchanger 40 ′ includes a flat plate-shaped first heat exchange section 42 ′ and a flat plate-shaped second heat exchange section 44 ′ different from the first heat exchange section 42 ′. And may be provided. Further, the angle α'formed by the first plane F1 'of the first heat exchange section 42' and the second plane F2 'of the second heat exchange section 44' may be arranged to be an obtuse angle.

(4-2) Modification B
In the above embodiment, the first flat surface F1 of the first heat exchange section 42 and the second flat surface F2 of the second heat exchange section 44 are flat surfaces that spread in a direction intersecting the back surface 112 of the casing 110. However, the heat source side heat exchanger 40 is not limited to this, and one of the first plane F1 of the first heat exchange section 42 and the second plane F2 of the second heat exchange section 44 is a rear surface of the casing 110. It may be arranged in the casing 110 so as to form a plane that extends in parallel with 112. However, from the viewpoint that the heat source side suction port 110a formed on the right side surface 114 and the left side surface 116 of the casing 110 is also used to exchange heat with the refrigerant flowing through the heat source side heat exchanger 40 as much as possible. The heat source side heat exchanger 40 may be disposed in the casing 110 such that the first plane F1 of the first heat exchange section 42 and the second plane F2 of the second heat exchange section 44 intersect the back surface 112 of the casing 110. preferable.

(4-3) Modification C
In the above-described embodiment, the heat source side suction port 110a is formed on the back surface 112, the right side surface 114, and the left side surface 116 of the casing 110. The heat source side suction port 110a does not have to be formed on the side surface of one of the casings 110 as long as it can be sucked in from the inside.

  Although the embodiments of the present disclosure have been described above, it will be understood that various changes in form and details can be made without departing from the spirit and scope of the present disclosure described in the claims. .

10 Refrigerant circuit 20 Compressor 40, 40 'Heat source side heat exchanger (heat exchanger)
42,42 '1st heat exchange part 44,44' 2nd heat exchange part 46 3rd heat exchange part 50 Utilization side heat exchanger 60 Heat source side fan (fan)
60a 1st fan 60b 2nd fan 62 Fan motor 70 Utilization side fan 100 Air conditioner 102 Heat source unit 110 Casing 110b Heat source side suction port (suction port)
112 Back side (first side)
114 Right side (second side)
116 Left side (third side)
D1 Air flow direction (first air flow direction)
F1, F1 'First plane F2, F2' Second plane Z Figure α, α'angle

JP 2007-127388 A

Claims (9)

A heat exchanger (40, 40 ') including a first heat exchange section (42, 42') and a second heat exchange section (44, 44 ');
A fan (60) which generates an air flow passing through the heat exchanger and is arranged on the lee side in the direction (D1) of the air flow with respect to the heat exchanger;
A casing (110) housing the heat exchanger and the fan, the casing (110) having a first side surface (112) facing the windward side of the heat exchanger in the direction of the air flow;
Equipped with
The first heat exchange section has a first plane (F1, F1 ′) on the windward side in the direction of the air flow,
The second heat exchange unit has a second plane (F2, F2 ′) on the windward side in the direction of the air flow,
An angle (α, α ′) formed by the first plane and the second plane is an obtuse angle,
A heat source unit (102) of an air conditioner. In a plan view, the first plane and the second plane spread in a direction intersecting with the first side surface of the casing,
The heat source unit of the air conditioner according to claim 1. The casing further includes a second side surface (114) and a third side surface (116) extending from both ends of the first side surface so as to intersect the first side surface,
A suction port (110b) is formed on the first side surface, the second side surface, and the third side surface of the casing, and when the fan is operated, the first side surface, the second side surface, and the second side surface. Air taken in from the suction port formed on the three side surfaces passes through the heat exchanger,
The heat source unit of the air conditioning apparatus according to claim 1. The heat exchanger (40) includes a curved third heat exchange section (46) arranged between the first heat exchange section (42) and the second heat exchange section (44), and 1 heat exchange section, the 3rd heat exchange section, and the 2nd heat exchange section are continuous,
The heat source unit of the air conditioner according to any one of claims 1 to 3. In a plan view, a straight line (L1) connecting the ends of the first heat exchanging part, the second heat exchanging part, and the proximal side ends of the first heat exchanging part and the second heat exchanging part. And driving the fan inside a figure (Z) surrounded by a straight line (L2) connecting the distal ends of the first heat exchange section and the second heat exchange section. At least a portion of the fan motor (62) is located,
The heat source unit of the air conditioner according to any one of claims 1 to 4. Further comprising a compressor (20) forming a refrigerant circuit (10) of the air conditioner with the heat exchanger,
The compressor is arranged above or below the heat exchanger,
The heat source unit of the air conditioning apparatus according to any one of claims 1 to 5. The fan includes at least a first fan (60a) and a second fan (60b).
A heat source unit for an air conditioner according to any one of claims 1 to 6. The first fan and the second fan are arranged side by side vertically.
The heat source unit of the air conditioning apparatus according to claim 7. A refrigerant circuit (10) including a compressor (20), a heat source side heat exchanger (40, 40 '), and a utilization side heat exchanger (50), and a heat source for generating an airflow passing through the heat source side heat exchanger. A side fan (60), a use side fan (70) that generates an airflow that passes through the use side heat exchanger, a casing (110) that houses the refrigerant circuit, the heat source side fan, and the use side fan, An air conditioner arranged outside the air-conditioned space having:
The heat source side heat exchanger includes a first heat exchange section (42, 42 ′) and a second heat exchange section (44, 44 ′),
The heat source side fan is arranged on the leeward side in the first air flow direction (D1) which is the direction of the air flow generated by the heat source side fan with respect to the heat source side heat exchanger,
The casing has a first side surface (112) arranged facing the windward side of the heat source side heat exchanger in the first air flow direction,
The first heat exchange section has a first plane (F1, F1 ′) on the windward side in the first air flow direction,
The second heat exchange unit has a second plane (F2, F2 ′) on the windward side in the first airflow direction,
An angle (α, α ′) formed by the first plane and the second plane is an obtuse angle,
Air conditioner (100).

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