Air conditioning device

Abstract

This air conditioning device is provided with: a casing; a heat exchanger disposed in the casing; a compressor disposed in the casing; an electrical component that controls the compressor; an electrical box that is disposed in the casing, accommodates the electrical component, and has an intake unit and an exhaust unit; a fan that generates an airflow through the interior of the electrical box from the intake unit to the exhaust unit; and refrigerant piping that forms a refrigerant flow path for a refrigeration cycle including the heat exchanger and the compressor. The refrigerant piping is disposed along the outer surface of the electrical box.

Description

air conditioner

[0001] This application claims priority to Japanese Patent Application No. 2024-068369, filed on April 19, 2024, the contents of which are incorporated herein by reference.

[0002] Air conditioners are equipped with electrical components that control the operation of a compressor that compresses a refrigerant. The electrical components include heat-generating components such as inverters that generate heat when the compressor is operated. For this reason, airflow generated by a fan is used to suppress the temperature rise of the heat-generating components.

[0003] For example, Patent Document 1 discloses a configuration in which electrical components housed in a casing of an outdoor unit of an air conditioner are cooled by outside air taken in from outside the casing. The casing includes an outside air intake port and an exhaust port. In the configuration of Patent Document 1, outside air is taken into the casing through the outside air intake port by operating a fan for cooling a condenser housed in the casing. The outside air taken into the casing in this manner is cooled as it passes near an accumulator provided in the casing, and after cooling the electrical components, is discharged to the outside of the casing through the exhaust port.

[0004] Japanese Patent No. 5879533

[0005] However, in the air conditioning system configuration described in Patent Document 1, the electrical components are cooled by outside air taken in from outside the casing, so if the outside air temperature is very high, the electrical components may not be cooled sufficiently. Furthermore, if the outside air taken in from outside the casing has high humidity, condensation may occur on the surfaces of the electrical components, and malfunctions of the electrical components may occur due to water droplets caused by the condensation.

[0006] The present disclosure has been made to solve the above-mentioned problems, and aims to provide an air conditioning system that can efficiently cool electrical components while suppressing the occurrence of condensation on the electrical components.

[0007] In order to solve the above problems, the air conditioning device according to the present disclosure includes a casing, a heat exchanger, a compressor, electrical components, an electrical box, a fan, and refrigerant piping. The heat exchanger is provided within the casing. The compressor is provided within the casing. The electrical components control the compressor. The electrical box is provided within the casing and houses the electrical components. The electrical box has an intake section and an exhaust section. The fan generates an air flow that passes through the electrical box from the intake section to the exhaust section. The refrigerant piping forms a refrigerant flow path of a refrigeration cycle that includes the heat exchanger and the compressor. The refrigerant piping is arranged along the outer surface of the electrical box.

[0008] According to the air conditioning system of the present disclosure, it is possible to efficiently cool electrical components while suppressing the occurrence of condensation on the electrical components.

[0009] 1 is a schematic diagram of an air conditioner according to an embodiment of the present disclosure, viewed from a first horizontal direction; FIG. 2 is a schematic diagram of an electrical box and low-temperature components of an air conditioner according to an embodiment of the present disclosure, viewed from a second horizontal direction;

[0010] An air conditioner according to an embodiment of the present disclosure will be described below with reference to Figures 1 to 3. (Configuration of Air Conditioner) As shown in Figure 1, an air conditioner 1 according to this embodiment includes an outdoor unit 2 and an indoor unit (not shown).

[0011] The outdoor unit 2 includes a casing 20, a compressor 4, a four-way valve 5, a water heat exchanger (heat exchanger) 6, a receiver (low-temperature component) 7, expansion valves 8A and 8B, an air heat exchanger (heat exchanger) 9, an accumulator (low-temperature component) 10, a heat exchanger fan 11, a pump 12, an electrical box 13, and a fan 30 (see FIGS. 2 and 3 ). The compressor 4, the four-way valve 5, the water heat exchanger 6, the receiver 7, the expansion valves 8A and 8B, the air heat exchanger 9, and the accumulator 10 are connected by refrigerant piping 3 that forms a refrigerant flow path. The refrigerant piping 3 constitutes a refrigerant circuit of a refrigeration cycle.

[0012] (Casing) FIG. 2 is a schematic diagram of an air conditioner according to an embodiment of the present disclosure, viewed from a first horizontal direction. As shown in FIG. 2 , the casing 20 is formed, for example, in the shape of a rectangular parallelepiped box. The casing 20 has a partition plate 25. The partition plate 25 divides the interior of the casing 20 into a heat exchange chamber R1 and a machine chamber R2. The partition plate 25 of this embodiment is provided in the middle of the casing 20 in the horizontal first direction D1 and has a flat plate shape extending in the vertical direction. The partition plate 25 divides the interior space of the casing 20 into multiple spaces aligned in the horizontal first direction D1. The partition plate 25 of this embodiment divides the interior space of the casing 20 into a heat exchange chamber R1 on a first side in the horizontal first direction D1 and a machine chamber R2 on a second side in the horizontal first direction D1.

[0013] (Heat Exchanger Chamber) The air heat exchanger 9 is housed in the heat exchange chamber R1 of the casing 20. (Heat Exchanger Fan) The heat exchanger fan 11 is provided in the upper part of the casing 20. The heat exchanger fan 11 circulates air inside and outside the heat exchange chamber R1. The air heat exchanger 9 exchanges heat between the refrigerant and outside air introduced by the blowing of the heat exchanger fan 11.

[0014] (Machinery Room) The compressor 4, four-way valve 5, water heat exchanger 6, receiver 7, expansion valves 8A and 8B, accumulator 10, pump 12, electrical equipment box 13, and fan 30 are housed in the machinery room R2. Note that multiple sets of the compressor 4, four-way valve 5, receiver 7, expansion valves 8A and 8B, and accumulator 10 may be provided in parallel within the machinery room R2. Note that FIG. 2 illustrates only the compressor 4, receiver 7, accumulator 10, electrical equipment box 13, electrical equipment 14, and fan 30 as components of the refrigeration cycle disposed within the machinery room R2, and does not illustrate other components. The machinery room R2 has openings, such as slits, formed in its peripheral wall to allow air exhausted from an exhaust section 13b (described later) to be discharged to the outside of the machinery room R2 and to allow cooling air to be introduced into the machinery room R2 from the outside.

[0015] (Compressor) As shown in Fig. 1, the compressor 4 compresses a refrigerant and supplies the compressed high-temperature, high-pressure refrigerant to a refrigerant circuit. The compressor 4 has an internal motor (not shown). The motor of the compressor 4 is driven by an inverter. For example, the motor of the compressor 4 rotates at a speed corresponding to the output frequency of the inverter, and the compressor 4 supplies the refrigerant circuit with a discharge amount corresponding to the rotation speed of the motor.

[0016] (Water Heat Exchanger) The water heat exchanger 6 exchanges heat between the refrigerant and water pumped by the pump 12. (Receiver) The receiver 7 is connected between the expansion valve 8A and the expansion valve 8B in the direction of refrigerant flow. The receiver 7 stores the liquid refrigerant condensed in the condenser (air heat exchanger 9 or water heat exchanger 6). The expansion valve 8A expands and reduces the pressure of the liquid refrigerant from the air heat exchanger 9 serving as a condenser, changing it into a low-temperature, low-pressure refrigerant. The expansion valve 8B expands and reduces the pressure of the liquid refrigerant from the water heat exchanger 6 serving as a condenser, changing it into a low-temperature, low-pressure refrigerant.

[0017] (Accumulator) The accumulator 10 is connected upstream of the compressor 4 in the refrigerant flow direction. The accumulator 10 separates the refrigerant in a gas-liquid mixed state that was not completely gasified in the evaporator (the water heat exchanger 6 or the air heat exchanger 9) into gas and liquid, and prevents the liquid refrigerant from flowing into the compressor 4.

[0018] (Four-way Valve) The four-way valve 5 changes the flow direction of the refrigerant in the refrigerant pipe 3, switching the operating state of the air conditioner 1 between heating operation and cooling (or defrosting) operation. Control of the open / close state of the four-way valve 5 and adjustment of the operating temperature are performed by electrical equipment 14 housed in an electrical equipment box 13. During heating operation, the refrigerant discharged from the compressor 4 flows through the water heat exchanger 6, expansion valve 8B, receiver 7, expansion valve 8A, air heat exchanger 9, and accumulator 10 in this order. At this time, the water heat exchanger 6 functions as a condenser, and the air heat exchanger 9 functions as an evaporator. Hot water heated in the water heat exchanger 6 is supplied to the outside via water pipe 18.

[0019] On the other hand, during cooling (defrosting) operation, the refrigerant discharged from the compressor 4 flows in the following order: air heat exchanger 9, expansion valve 8A, receiver 7, expansion valve 8B, heat exchanger 6, and accumulator 10. The air heat exchanger 9 functions as a condenser, and the water heat exchanger 6 functions as an evaporator. Chilled water cooled in the water heat exchanger 6 is supplied to the outside via water piping 18.

[0020] (Electrical Box) Figure 3 is a schematic diagram of the electrical box and low-temperature components of the air conditioner according to the embodiment of the present disclosure, viewed from a second horizontal direction. As shown in Figures 2 and 3, the electrical box 13 is box-shaped and houses the electrical components 14. The electrical box 13 is configured to be able to introduce the air flow generated by the fan 30. The electrical box 13 has an intake section 13a and an exhaust section 13b.

[0021] (Air Intake Section) The air intake section 13a introduces the air flow generated by the fan 30 from inside the machine chamber R2 into the electrical equipment box 13. The air intake section 13a of the electrical equipment box 13 of this embodiment is provided so as to open downward.

[0022] (Exhaust Section) The exhaust section 13b exhausts air introduced into the electrical box 13 from the intake section 13a into the machine chamber R2. The exhaust section 13b opens in a direction different from that of the intake section 13a. In this embodiment, the exhaust section 13b opens upward. An opening that communicates the inside and outside of the machine chamber R2 may be formed on the top surface of the electrical box 13. In this case, air from the internal space of the electrical box 13 exhausted from the exhaust section 13b is exhausted to the outside of the electrical box 13 through the opening on the top surface of the electrical box 13. Alternatively, the top surface of the electrical box 13 may not have an opening, and the air exhausted from the exhaust section 13b may be circulated within the machine chamber R2. Note that the exhaust section 13b may open not only upward but also in another direction, such as the first horizontal direction D1.

[0023] The electrical box 13 includes a pair of first side plates 131, a second side plate 132, and a third side plate 133. As shown in FIG. 2 , the pair of first side plates 131 are spaced apart in the horizontal first direction D1. Each of the pair of first side plates 131 has a flat plate shape extending along a vertical plane intersecting the horizontal first direction D1. Lower ends 131b of the pair of first side plates 131 are inclined downward so that the distance between them in the horizontal first direction D1 gradually decreases. As shown in FIG. 3 , the second side plate 132 extends along a vertical plane perpendicular to the horizontal second direction D2. The second side plate 132 connects the pair of first side plates 131 to each other on a first side in the horizontal second direction D2 perpendicular to the horizontal first direction D1 in the horizontal plane.

[0024] The third side plate 133 is spaced apart from the second side plate 132 on the second side in the horizontal second direction D2 (one side in the horizontal second direction D2). The third side plate 133 connects the pair of first side plates 131 to each other on the second side in the horizontal second direction D2. The third side plate 133 has an upper plate portion 133a and an inclined plate portion 133b. The upper plate portion 133a extends along a vertical plane intersecting the horizontal second direction D2. The upper end of the inclined plate portion 133b is connected to the lower end of the upper plate portion 133a. The inclined plate portion 133b extends upward from the opening edge of the intake portion 13a and is inclined upward so as to move away from the intake portion 13a toward the second side (one side) in the horizontal second direction D2. Note that in this embodiment, the inclined plate portion 133b is a flat plate with a constant inclination angle. However, the inclination angle of the inclined plate portion 133b is not limited to a fixed angle as long as the droplets adhering to the inner surface of the inclined plate portion 133b can move by their own weight toward the intake portion 13a.

[0025] (Electrical Equipment) As shown in FIGS. 2 and 3 , the electrical equipment 14 includes an inverter, a control circuit, a power supply circuit, and the like. The electrical equipment 14 controls the operation of the compressor 4 and the four-way valve 5. The electrical equipment 14 is accommodated in the internal space of the electrical equipment box 13 via a support member 19. The support member 19 extends, for example, in a vertical direction intersecting the horizontal second direction D2. An end of the support member 19 is connected to the electrical equipment box 13 via, for example, a bracket (not shown). The electrical equipment 14 is located away from the inner surface 13g of the electrical equipment box 13. As shown in FIG. 3 , the electrical equipment 14 of this embodiment is disposed on the second side (one side) of the intake section 13a in the horizontal second direction D2 when viewed from the horizontal first direction D1.

[0026] (Fan) The fan 30 generates an air flow that passes through the electrical box 13 from the intake section 13a to the exhaust section 13b in the machine room R2. The fan 30 in this embodiment is disposed in the electrical box 13. Specifically, the fan 30 is disposed in the electrical box 13 above the intake section 13a. The fan 30 is disposed in the electrical box 13 below the electrical components 14. The fan 30 in this embodiment is constantly operating while the air conditioner 1 is in operation. Operation of the fan 30 generates an air flow that passes through the electrical box 13 from the intake section 13a to the exhaust section 13b. The fan 30 may be disposed closer to the exhaust section 13b than the electrical components 14.

[0027] (Refrigerant piping) The electrical box 13 is disposed above the refrigerant piping 3. The refrigerant piping 3 is provided along the outer surface of the electrical box 13. The refrigerant piping 3 of this embodiment is provided along the outer surface 13f of the electrical box 13. The refrigerant piping 3 of this embodiment is in contact with the outer surface 13f of the electrical box 13. The refrigerant piping 3 may be in contact with the outer surface 13f via a heat-conductive material, such as an adhesive or solder.

[0028] In this embodiment, a portion of the refrigerant pipe 3 extending in the horizontal first direction D1 contacts the outer surface 13f of the electrical box 13. In this embodiment, the refrigerant pipe 3 contacts the outer surface 13f of the inclined plate portion 133b. Here, it is preferable that a region of the refrigerant pipe 3 constituting the refrigeration cycle, where the refrigerant is at a temperature lower than that of the electrical components 14, contacts the outer surface 13f of the electrical box 13. In this embodiment, a region of the refrigerant pipe 3 between the condenser and the expansion valves 8A, 8B contacts the outer surface 13f of the inclined plate portion 133b.

[0029] (Low-Temperature Components) The electrical box 13 is disposed above the low-temperature components, namely, the receiver 7 and the accumulator 10. The intake section 13a, which opens downward, is provided in a position that faces vertically the low-temperature components, namely, the receiver 7 and the accumulator 10. No other members are provided between the intake section 13a and the low-temperature components, namely, the receiver 7 and the accumulator 10.

[0030] The temperatures of the refrigerant in the receiver 7 and the accumulator 10 are lower than the temperature of the refrigerant in the compressor 4 (and the water heat exchanger 6). Furthermore, the temperatures of the refrigerant in the receiver 7 and the accumulator 10 are lower than the temperature of the electrical components 14 that rises as the electrical components 14 in the electrical box 13 operate. That is, in this embodiment, the receiver 7 and the accumulator 10 are low-temperature components that are lower in temperature than the electrical components 14. Furthermore, the temperature of the refrigerant in the accumulator 10 is lower than the temperature of the refrigerant in the receiver 7.

[0031] (Explanation of Operation) Next, the operation of the air conditioner 1 of this embodiment will be described. When the air conditioner 1 is operated, current flows through the circuit, and the electrical components 14 in the electrical box 13 generate heat due to internal resistance and other factors. Meanwhile, the fan 30 is activated. As a result, air generated by the fan 30 passes through the electrical box 13 from the intake section 13a to the exhaust section 13b. When the compressor 4 is activated, refrigerant circulates through the refrigerant pipes 3 that constitute the refrigeration cycle, and the temperature of the refrigerant pipes 3 in an area along the outer surface 13f of the electrical box 13 decreases. This heat transfer from the refrigerant pipes 3 cools the electrical box 13. Then, the air introduced into the electrical box 13 from the intake section 13a of the electrical box 13 by the fan 30 is cooled by the electrical box 13. As a result, a temperature rise of the electrical components 14 housed in the electrical box 13 is suppressed.

[0032] (Operation and Effect) In the air conditioner 1 of the above embodiment, the refrigerant pipes 3 are arranged along the outer surface 13f of the electrical box 13. Therefore, the electrical box 13 is cooled by the refrigerant pipes 3. The air conditioner 1 also includes a fan 30 that generates a flow of air passing through the electrical box 13 from the intake section 13a to the exhaust section 13b. Therefore, the air introduced into the electrical box 13 from the intake section 13a of the electrical box 13 by the fan 30 is cooled by the electrical box 13. The air cooled by the electrical box 13 suppresses a temperature rise of the electrical components 14 housed in the electrical box 13.

[0033] Furthermore, the refrigerant flowing through the refrigerant pipe 3 keeps the refrigerant pipe 3 at a low temperature. Therefore, even when the outside air temperature is high, the electrical box 13 can be sufficiently cooled. Furthermore, when the outside air humidity is high, the cooled electrical box 13 causes air introduced into the electrical box 13 from the intake section 13a to condense upon contact with the electrical box 13. Therefore, in the direction of air flow passing through the electrical box 13, air with reduced humidity flows downstream of the area where condensation has occurred. As a result, condensation on the electrical components 14 is suppressed. In this way, the electrical components 14 can be efficiently cooled while suppressing condensation on the electrical components 14.

[0034] In the above embodiment, the refrigerant pipe 3 is provided along the outer surface 13f of the electrical box 13. This allows the electrical box 13 to be cooled more efficiently.

[0035] In the above embodiment, the electrical components 14 are disposed away from the inner surface 13g of the electrical box 13, which prevents the electrical components 14 from being excessively cooled by the electrical box 13, which is cooled by the refrigerant pipe 3. This more effectively prevents condensation from forming on the electrical components 14.

[0036] In the above embodiment, the refrigerant pipe 3 abuts against the inclined plate portion 133b. As a result, when air introduced into the electrical box 13 from the intake portion 13a comes into contact with the electrical box 13 and condenses, the condensed water flows downward along the inclined plate portion 133b and is discharged from the intake portion 13a to below the electrical box 13.

[0037] In the above embodiment, the electrical equipment 14 is disposed on the second side (one side) of the intake portion 13a in the horizontal second direction D2. As a result, the air introduced into the electrical box 13 from the intake portion 13a flows upward along the inclined plate portion 133b, away from the intake portion 13a to the second side (one side) in the horizontal second direction D2, and reaches the electrical box 13. Therefore, inside the electrical box 13, the air comes into contact with the inclined plate portion 133b, with which the refrigerant pipe 3 abuts, over a longer area, and is cooled. This allows the electrical equipment 14 to be cooled more efficiently.

[0038] In the above embodiment, the fan 30 is provided in the interior space of the electrical box 13 above the intake section 13a. Therefore, even if the air introduced into the interior of the electrical box 13 from the intake section 13a comes into contact with the electrical box 13 and condenses, the condensed water can be prevented from coming into contact with the fan 30.

[0039] In the above embodiment, the accumulator 10 and receiver 7, which are low-temperature components, are provided in positions facing the intake section 13a. The fan 30 introduces air that has passed through the accumulator 10 and receiver 7 inside the casing 20 into the internal space of the electrical box 13 through the intake section 13a. As a result, the air sent into the electrical box 13 is cooled by passing through the accumulator 10 and receiver 7. This allows the temperature and humidity of the air used to cool the electrical components 14 to be gradually reduced, thereby more effectively suppressing a rise in the temperature of the electrical components 14 housed in the electrical box 13.

[0040] In the above embodiment, the low-temperature components are the accumulator 10 and the receiver 7 that constitute the refrigeration cycle. As a result, the refrigerant becomes low temperature in the accumulator 10 and the receiver 7. Therefore, by using the accumulator 10 and the receiver 7 as low-temperature components, low-temperature air that has passed through the accumulator 10 and the receiver 7 can be sent into the electrical box 13. As a result, the electrical components 14 in the electrical box 13 can be efficiently cooled.

[0041] Furthermore, in the above embodiment, the electrical equipment box 13 is disposed above the accumulator 10 and the receiver 7. As a result, the air cooled after passing through the accumulator 10 and the receiver 7 increases in temperature by cooling the electrical components 14 in the electrical equipment box 13. For this reason, an upward air current is likely to be generated from around the accumulator 10 and the receiver 7 toward the electrical components 14 in the electrical equipment box 13 disposed above the accumulator 10 and the receiver 7. By disposing the electrical equipment box 13 above the accumulator 10 and the receiver 7, air can be efficiently circulated from around the accumulator 10 and the receiver 7 toward the interior of the electrical equipment box 13.

[0042] In the above embodiment, the exhaust portion 13b opens upward. As a result, the air that has been cooled through the accumulator 10 and the receiver 7 and then sent into the electrical box 13 increases in temperature by cooling the electrical components 14. Since the heated air rises within the electrical box 13, by opening the exhaust portion 13b upward, the air that has passed through the electrical components 14 within the electrical box 13 can be efficiently discharged from the electrical box 13 into the casing 20.

[0043] The above describes an embodiment of the present disclosure. Various changes and modifications can be made to the above configuration without departing from the spirit and scope of the present disclosure. For example, the shapes, arrangements, and dimensions of the electrical box 13 and the electrical components 14 described with reference to FIGS. 2 and 3 are merely examples and can be modified as appropriate depending on the design and specifications. For example, the configuration of the refrigeration cycle is not limited to the configuration shown in FIG. 1 . In the above embodiment, both the accumulator 10 and the receiver 7 as low-temperature components are described as being positioned facing the intake section 13a. However, only one of the accumulator 10 and the receiver 7 may be positioned facing the intake section 13a. In the above embodiment, the fan 30 generates an air flow passing through the electrical box 13 from the intake section 13a to the exhaust section 13b. However, this is not limiting. For example, the heat exchanger fan 11 may be operated as a fan to generate an air flow passing through the electrical box 13 from the intake section 13a to the exhaust section 13b.

[0044] <Additional Notes> The air conditioner 1 described in the embodiment can be understood, for example, as follows.

[0045] (1) The air conditioning device 1 according to the first aspect includes a casing 20, heat exchangers 6 and 9 provided within the casing 20, a compressor 4 provided within the casing 20, electrical equipment 14 for controlling the compressor 4, an electrical box 13 provided within the casing 20, housing the electrical equipment 14 and having an intake section 13a and an exhaust section 13b, a fan 30 for generating an air flow passing through the electrical box 13 from the intake section 13a to the exhaust section 13b, and refrigerant piping 3 for forming a refrigerant flow path of a refrigeration cycle including the heat exchangers 6 and 9 and the compressor 4, and the refrigerant piping 3 is arranged along the outer surface 13f of the electrical box 13.

[0046] This configuration cools the electrical box 13. Furthermore, the air introduced into the interior of the electrical box 13 through the intake section 13a of the electrical box 13 by the fan 30 is cooled by the electrical box 13. This suppresses the temperature rise of the electrical components 14 housed in the electrical box 13. Furthermore, the refrigerant flowing through the refrigerant piping 3 keeps the refrigerant piping 3 at a low temperature. Therefore, the electrical box 13 can be sufficiently cooled even when the outside air temperature is high. Furthermore, when the outside air humidity is high, the cooled electrical box 13 causes the air introduced into the interior of the electrical box 13 through the intake section 13a to condense upon contact with the electrical box 13. Therefore, in the direction of air flow through the electrical box 13, air with reduced humidity flows downstream of the portion where condensation occurs. As a result, condensation on the electrical components 14 is suppressed. In this way, the electrical components 14 can be efficiently cooled while suppressing condensation on the electrical components 14.

[0047] (2) The air conditioner 1 according to a second aspect is the air conditioner 1 according to (1), in which the electrical equipment 14 is provided away from the inner surface 13 g of the electrical equipment box 13 .

[0048] This prevents the electrical components 14 from being excessively cooled through the electrical component box 13, which is kept at a low temperature by the refrigerant pipe 3. This makes it possible to more effectively prevent condensation from forming on the electrical components 14.

[0049] (3) The air conditioning device 1 according to the third aspect is any one of the air conditioning devices 1 of (1) or (2), wherein the electrical box 13 has an inclined plate portion 133b that extends upward from the opening edge of the intake portion 13a and inclines so as to move away from the intake portion 13a to one side in the horizontal direction as it extends upward, and the refrigerant piping 3 abuts against the inclined plate portion 133b.

[0050] As a result, when the air introduced into the electrical box 13 from the intake section 13a condenses upon contact with the electrical box 13, the condensed water flows downward along the inclined plate section 133b and is discharged from the intake section 13a to the outside of the electrical box 13.

[0051] (4) The air conditioner 1 according to a fourth aspect is the air conditioner 1 according to (3), in which the electrical equipment 14 is disposed on one side of the intake portion 13a in the horizontal direction D2.

[0052] As a result, the air introduced into the electrical box 13 from the intake portion 13a flows upward along the inclined plate portion 133b, away from the intake portion 13a to one side in the horizontal direction D2, and reaches the electrical box 13. Therefore, inside the electrical box 13, the air is cooled by contacting a longer area of ​​the inclined plate portion 133b with which the refrigerant pipe 3 abuts. This allows the electrical components 14 to be cooled more efficiently.

[0053] (5) The air conditioning device 1 according to the fifth aspect is any one of the air conditioning devices 1 of (1) to (4), in which the fan 30 is provided in the internal space of the electrical box 13 above the intake section 13a.

[0054] This makes it possible to prevent the condensed water from coming into contact with the fan 30 even if the air introduced into the electrical box 13 from the intake section 13a comes into contact with the electrical box 13 and condenses.

[0055] (6) The air conditioning device 1 according to the sixth aspect is any one of the air conditioning devices 1 according to (1) to (5), further comprising low-temperature components 7, 10 that are provided in the internal space of the casing 20, are provided in part of a refrigeration cycle including the heat exchangers 6, 9, and are at a lower temperature than the electrical equipment 14, the low-temperature components 7, 10 are provided in a position opposite the intake section 13a, and the fan 30 introduces air that has passed through the low-temperature components 7, 10 inside the casing 20 from the intake section 13a into the internal space of the electrical equipment box 13.

[0056] As a result, the fan 30 introduces air that has passed through the low-temperature components 7 and 10 inside the casing 20 from the intake section 13a into the internal space of the electrical box 13. The air sent into the electrical box 13 is cooled by passing through the low-temperature components 7 and 10. This makes it possible to more effectively suppress temperature increases in the electrical components 14 housed in the electrical box 13.

[0057] (7) The air conditioner 1 according to a seventh aspect is the air conditioner 1 according to (6), wherein the low-temperature components 7, 10 are at least one of an accumulator 10 and a receiver 7 that constitute the refrigeration cycle.

[0058] As a result, the refrigerant circulating through the refrigeration cycle becomes low temperature in the accumulator 10 and receiver 7 that constitute the refrigeration cycle. Therefore, by using at least one of the accumulator 10 and the receiver 7 as a low-temperature member, low-temperature air that has passed through the accumulator 10 and the receiver 7 and has been cooled can be sent into the electrical box 13. This allows the electrical components 14 in the electrical box 13 to be efficiently cooled.

[0059] (8) The air conditioner 1 according to an eighth aspect is the air conditioner 1 according to (6) or (7), in which the electrical box 13 is disposed above the low-temperature components 7 and 10.

[0060] As a result, the air cooled through the low-temperature components 7, 10 increases in temperature by cooling the electrical components 14 in the electrical box 13. For this reason, an upward air current tends to be generated from around the low-temperature components 7, 10 toward the electrical components 14 in the electrical box 13 arranged above the low-temperature components 7, 10. By arranging the electrical box 13 above the low-temperature components 7, 10, air can be efficiently circulated from around the low-temperature components 7, 10 toward the interior of the electrical box 13.

[0061] (9) The air conditioner 1 according to a ninth aspect is the air conditioner 1 according to any one of (1) to (8), in which the exhaust portion 13b opens upward.

[0062] As a result, the air that has been cooled through the low-temperature components 7 and 10 and sent into the electrical box 13 increases in temperature by cooling the electrical components 14. Since the heated air rises within the electrical box 13, by opening the exhaust section 13b upward, the air that has passed through the electrical components 14 within the electrical box 13 can be efficiently discharged from the electrical box 13 into the casing 20.

[0063] According to the air conditioning system of the present disclosure, it is possible to efficiently cool electrical components while suppressing the occurrence of condensation on the electrical components.

[0064] DESCRIPTION OF SYMBOLS 1 Air conditioner 2 Outdoor unit 3 Refrigerant piping 4 Compressor 5 Four-way valve 6 Water heat exchanger (heat exchanger) 7 Low-temperature component 7 Receiver (low-temperature component) 8A, 8B Expansion valve 9 Air heat exchanger (heat exchanger) 10 Accumulator (low-temperature component) 11 Heat exchanger fan 12 Pump 13 Electrical box 13a Intake section 13b Exhaust section 13f Outer surface 13g Inner surface 14 Electrical components 18 Water piping 19 Support member 20 Casing 25 Partition plate 30 Fan 131 First side plate 131b Lower end portion 132 Second side plate 133 Third side plate 133a Upper plate portion 133b Inclined plate portion D1 Horizontal first direction D2 Horizontal second direction (horizontal direction) R1 Heat exchange chamber R2 Machine room

Claims

1. An air conditioning device comprising: a casing; a heat exchanger provided within the casing; a compressor provided within the casing; electrical equipment controlling the compressor; an electrical box provided within the casing, accommodating the electrical equipment and having an intake section and an exhaust section; a fan that generates an air flow that passes through the electrical box from the intake section to the exhaust section; and refrigerant piping that forms a refrigerant flow path of a refrigeration cycle including the heat exchanger and the compressor, wherein the refrigerant piping is arranged along the outer surface of the electrical box.

2. The air conditioning system according to claim 1, wherein the electrical equipment is provided away from the inner surface of the electrical box.

3. An air conditioning device as claimed in claim 1 or 2, wherein the electrical box has an inclined plate portion that extends upward from the opening edge of the intake portion and is inclined so as to move away from the intake portion to one side in the horizontal direction as it extends upward, and the refrigerant piping abuts against the inclined plate portion.

4. The air conditioning system according to claim 3, wherein the electrical equipment is disposed on one side of the intake section in the horizontal direction.

5. The air conditioning device according to claim 1, wherein the fan is provided in the internal space of the electrical box above the intake section.

6. An air conditioning system as described in claim 1, further comprising a low-temperature component disposed in the internal space of the casing, which is disposed in a part of a refrigeration cycle including the heat exchanger and has a lower temperature than the electrical equipment, the low-temperature component being disposed in a position opposite the intake section, and the fan introducing air that has passed through the low-temperature component inside the casing from the intake section into the internal space of the electrical equipment box.

7. The air conditioner according to claim 6, wherein the low-temperature component is at least one of an accumulator and a receiver that constitute the refrigeration cycle.

8. The air conditioner according to claim 6, wherein the electrical box is disposed above the low-temperature components.

9. The air conditioner according to claim 1, wherein the exhaust section opens upward.

Images