Air-conditioning device

Abstract

An air-conditioning device according to the present invention comprises: a housing that has a suction port at a front surface and a blowing port at an upper part and contains an air passage that goes from the suction port to the blowing port; a blower that is provided on the air passage; a heat exchanger that is provided on the air passage upstream of the blower; and a plurality of sprinkling mechanisms that are provided on the air passage and spray a fluid toward at least the heat exchanger. The heat exchanger divides the air passage inside the housing into a primary-side space that is below the heat exchanger and a secondary-side space that is above the heat exchanger, and the plurality of sprinkling mechanisms are respectively provided in the primary-side space and the secondary-side space.

Description

air conditioning equipment

[0001] The present disclosure relates to an air conditioner whose housing is capable of being cleaned inside.

[0002] When an air conditioner is installed in an environment such as a food factory, oil or powder may adhere to the heat exchanger. The air conditioner requires frequent cleaning to maintain hygiene and prevent deterioration of heat exchange performance due to the adhesion of dirt to the heat exchanger.

[0003] For example, in the case of a vertically-mounted air conditioner installed on the floor, a heat exchanger and a blower are provided within the housing. The blower is located above the heat exchanger. When the blower is driven, air is drawn into the housing. The air is drawn in through an inlet provided on the front surface of the housing and blown out through an outlet provided on the top surface of the housing. The heat exchanger is arranged at an angle within the housing, with its upper end located on the front side and its lower end located on the rear side. A sprinkler device is located on the front side of the heat exchanger and sprinkles water toward the heat exchanger (see, for example, Patent Document 1).

[0004] JP 2011-058690 A

[0005] In an air conditioner with a floor-standing indoor unit, such as that disclosed in Patent Document 1, the heat exchanger is positioned at an angle within the housing, and is large relative to the cross-sectional area of ​​the housing. When a sprinkler system is placed on the inlet side of such a heat exchanger, the inlet side (primary side) of the heat exchanger can be automatically cleaned, but the outlet side (secondary side) of the heat exchanger cannot be cleaned efficiently, resulting in increased resistance to air passing through the heat exchanger and making it difficult to maintain hygiene. Furthermore, the outlet side of the heat exchanger requires the removal of a panel from the housing to clean, which is time-consuming.

[0006] The present disclosure has been made to solve such problems, and aims to provide an air conditioner that can efficiently clean both the primary side and the secondary side of a heat exchanger.

[0007] The air conditioning apparatus of the present disclosure comprises a housing having an intake port on the front and an exhaust port on the top, and forming an air passage from the intake port to the exhaust port, a blower installed in the air passage, a heat exchanger arranged upstream of the blower in the air passage, and a plurality of sprinkler mechanisms installed in the air passage and spraying fluid toward at least the heat exchanger, wherein the heat exchanger divides the air passage inside the housing into a primary side space below the heat exchanger and a secondary side space above the heat exchanger, and the plurality of sprinkler mechanisms are arranged in each of the primary side space and the secondary side space.

[0008] According to the air conditioning device of the present disclosure, a sprinkler mechanism is installed in both the primary space and the secondary space of the heat exchanger, allowing both sides of the heat exchanger to be washed efficiently and frequent cleaning to be possible, making it easier to maintain heat exchange efficiency and hygiene.

[0009] FIG. 4 is a refrigerant circuit diagram showing an example of the configuration of a refrigeration cycle device in which an air conditioning apparatus according to embodiment 1 is installed. FIG. 5 is a perspective view showing the exterior of an example of an air conditioning apparatus 100 according to embodiment 1. FIG. 6 is a front view showing the internal structure of an example of an air conditioning apparatus 100 according to embodiment 1. FIG. 7 is an explanatory diagram of the cross-sectional structure of part A-A in FIG. 3. FIG. 8 is a schematic diagram showing an example of a sprinkler mechanism 10 installed in the air conditioning apparatus 100 according to embodiment 1. FIG. 9 is a control flowchart for cleaning the heat exchanger 1 of the air conditioning apparatus 100 according to embodiment 1. FIG. 10 is a schematic diagram of the cross-sectional structure of an air conditioning apparatus 100 according to embodiment 2.

[0010] An embodiment of an air conditioning apparatus according to the present disclosure will be described below with reference to the drawings. The present disclosure is not limited to the following embodiment and can be modified in various ways without departing from the spirit and scope of the present disclosure. Furthermore, the present disclosure includes all possible combinations of configurations among the configurations shown in the following embodiment and its modified examples. In each drawing, identical symbols denote identical or equivalent components, and this applies throughout the specification. Note that the relative dimensional relationships or shapes of each component in each drawing may differ from the actual ones. In each drawing, the Z direction indicates the height direction of the air conditioning apparatus, e.g., the vertical direction. The X direction indicates the width direction of the air conditioning apparatus. The X direction is, e.g., the horizontal direction. The Y direction is the depth direction of the air conditioning apparatus. The Y direction indicates the direction intersecting the X direction and the Z direction, e.g., the horizontal direction. The X direction may be referred to as the first direction. The Z direction may be referred to as the second direction. The Y direction may be referred to as the third direction.

[0011] Embodiment 1. Fig. 1 is a refrigerant circuit diagram showing an example of the configuration of a refrigeration cycle device in which an air conditioning apparatus according to Embodiment 1 is provided. In Embodiment 1, an example will be described in which the refrigeration cycle device shown in Fig. 1 configures an air conditioning system 1000. However, the refrigeration cycle device is not limited to this case and can also be applied to other systems, such as a ventilation device with temperature control and an air cleaning device with temperature control.

[0012] As shown in Fig. 1 , the refrigeration cycle device constituting the air conditioning system 1000 has an outdoor unit 201 and an indoor unit 200. The outdoor unit 201 and the indoor unit 200 are connected via refrigerant piping 204. The outdoor unit 201 is provided with a compressor 102, a four-way valve 105, an outdoor heat exchanger 101, and an outdoor blower 103. The indoor unit 200 is provided with an indoor heat exchanger 101, an indoor blower 3, and an expansion valve 5.

[0013] The outdoor unit 201 and the indoor unit 200 are sometimes referred to as air conditioning apparatus 100. At least one of the outdoor unit 201 and the indoor unit 200 constitutes the "air conditioning apparatus 100" according to embodiment 1. In embodiment 1, a case will be described in which the indoor unit 200 constitutes the "air conditioning apparatus 100" according to embodiment 1.

[0014] These components that make up the air conditioning system 1000 shown in FIG. 1 will be described below.

[0015] The compressor 102 draws in the refrigerant flowing through the refrigerant pipe 106. The compressor 102 compresses the drawn refrigerant and discharges it into the refrigerant pipe 106. The compressor 102 is, for example, an inverter compressor. When the compressor 102 is an inverter compressor, the operating frequency may be changed arbitrarily by an inverter circuit or the like based on the control of the control device 50, thereby changing the capacity of the compressor 102 that discharges refrigerant per unit time. The refrigerant discharged from the compressor 102 flows into the indoor heat exchanger 101 during heating, and flows into the outdoor heat exchanger 101 during cooling.

[0016] The outdoor heat exchanger 101 exchanges heat between the refrigerant flowing inside the outdoor heat exchanger 101 and the outdoor air. The outdoor heat exchanger 101 functions as a condenser during cooling operation, condensing and liquefying the refrigerant. The outdoor heat exchanger 101 functions as an evaporator during heating operation, evaporating and vaporizing the refrigerant.

[0017] The indoor heat exchanger 1 exchanges heat between the refrigerant flowing inside the indoor heat exchanger 1 and the indoor air to be air-conditioned. The indoor heat exchanger 1 functions as an evaporator during cooling operation, evaporating and vaporizing the refrigerant. The indoor heat exchanger 1 functions as a condenser during heating operation, condensing and liquefying the refrigerant.

[0018] The outdoor heat exchanger 101 and the indoor heat exchanger 1 are, for example, fin-and-tube heat exchangers having heat transfer tubes and fins. The outdoor heat exchanger 101 and the indoor heat exchanger 1 are sometimes collectively referred to as heat exchangers.

[0019] The outdoor blower 103 is driven by a motor 104. The outdoor blower 103 blows outdoor air to the outdoor heat exchanger 101.

[0020] The indoor blower 3 is driven by a motor 4. The indoor blower 3 blows indoor air to the indoor heat exchanger 1.

[0021] The four-way valve 105 is configured to switch between a cooling operation, which cools the indoor space in which the indoor unit 200 is installed, and a heating operation, which heats the indoor space. The four-way valve 105 is a flow path switching device that switches the refrigerant flow between cooling operation and heating operation. During heating operation, the four-way valve 105 is in the state shown by the solid line in FIG. 1 , and the refrigerant discharged from the compressor 102 flows into the indoor heat exchanger 1. At this time, the indoor heat exchanger 1 of the indoor unit 200 functions as a condenser, and the outdoor heat exchanger 101 of the outdoor unit 201 functions as an evaporator. On the other hand, during cooling operation, the four-way valve 105 is in the state shown by the dashed line in FIG. 1 , and the refrigerant discharged from the compressor 102 flows into the outdoor heat exchanger 101 of the outdoor unit 201. At this time, the outdoor heat exchanger 101 of the outdoor unit 201 functions as a condenser, and the indoor heat exchanger 101 of the indoor unit 200 functions as an evaporator.

[0022] The expansion valve 5 is a pressure reducing device that reduces the pressure of the refrigerant to expand it, and is configured as, for example, an electronic expansion valve. When the expansion valve 5 is configured as an electronic expansion valve, its opening degree is adjusted based on instructions from the control device 50 or the like. The expansion valve 5 is provided between the outdoor heat exchanger 101 of the outdoor unit 201 and the indoor heat exchanger 1 of the indoor unit 200.

[0023] The compressor 102, the four-way valve 105, the indoor heat exchanger 1, the expansion valve 5, and the outdoor heat exchanger 101 are connected by a refrigerant pipe 106 to form a refrigerant circuit.

[0024] Next, the operation of the air conditioning system 1000 will be described with reference to FIG.

[0025] As shown in FIG. 1 , when the air conditioning system 1000 is in heating operation, the high-pressure, high-temperature gas refrigerant discharged from the compressor 102 flows into the indoor heat exchanger 1 via the four-way valve 105. In the indoor heat exchanger 1, the refrigerant condenses by exchanging heat with indoor air supplied by the indoor blower 3. The condensed refrigerant becomes a high-pressure liquid and flows out of the indoor heat exchanger 1. The refrigerant is then decompressed by the expansion valve 5 and becomes a low-pressure two-phase gas-liquid refrigerant. The low-pressure two-phase gas-liquid refrigerant flows into the outdoor heat exchanger 101. In the outdoor heat exchanger 101, the refrigerant evaporates by exchanging heat with outdoor air supplied by the outdoor blower 103. The evaporated refrigerant becomes a low-pressure gas and is drawn into the compressor 102.

[0026] When the air conditioning system 1000 is in cooling operation, the refrigerant flows in the opposite direction to that in heating operation. That is, when the air conditioning system 1000 is in cooling operation, the high-pressure, high-temperature gas refrigerant discharged from the compressor 102 flows into the outdoor heat exchanger 101 via the four-way valve 105. In the outdoor heat exchanger 101, the refrigerant condenses by exchanging heat with outdoor air supplied by the outdoor blower 103. The condensed refrigerant becomes a high-pressure liquid and flows out of the outdoor heat exchanger 101. The refrigerant is then decompressed by the expansion valve 5 and becomes a low-pressure two-phase gas-liquid refrigerant. The low-pressure two-phase gas-liquid refrigerant flows into the indoor heat exchanger 1. In the indoor heat exchanger 1, the refrigerant evaporates by exchanging heat with indoor air supplied by the indoor blower 3. The evaporated refrigerant becomes a low-pressure gas and is drawn into the compressor 102.

[0027] Fig. 2 is a perspective view showing the external appearance of an example of the air conditioning apparatus 100 pertaining to embodiment 1. Fig. 3 is a front view showing the internal structure of an example of the air conditioning apparatus 100 pertaining to embodiment 1. Fig. 4 is an explanatory diagram of the cross-sectional structure of section A-A in Fig. 3. The configuration of the air conditioning apparatus 100 pertaining to embodiment 1 will be described using Figs. 2, 3 and 4. In the following description, the air conditioning apparatus 100 corresponds to the indoor unit 200 described above.

[0028] As shown in Figure 2, the air conditioning device 100 is a floor-standing indoor unit that has an air inlet 21 on the front surface of a roughly rectangular parallelepiped housing 20 and an air outlet 24 on the top surface. The upper part of the front surface of the housing 20 is covered by a front panel 26, and the sides and back are covered by side panels 27 and a back panel 28, respectively. The air inlet 21 is provided in a lower front panel 25, and air flows in as shown by arrow C in Figure 2. The air that flows into the air conditioning device 100 is blown out from the top surface of the housing 20 as shown by arrow C.

[0029] As shown in Figure 4, the housing 20 has a blower 3 disposed therein and defines an air passage extending from an intake port 21 provided on the front surface to an outlet port 24 provided on the top surface. The air passage is divided into a primary space 22 and a secondary space 23 by a heat exchanger 1 disposed inside. The primary space 22 is a space closer to the intake port 21 than the heat exchanger 1. The secondary space 23 is a space closer to the outlet port 24 than the heat exchanger 1, and is equipped with the blower 3, a motor 4 for driving the blower 3, and the like.

[0030] A drain pan 29 is disposed below the heat exchanger 1. The drain pan 29 receives and discharges condensation water generated in the heat exchanger 1 and cleaning water.

[0031] As shown in Figure 4, the heat exchanger 1 is arranged at an angle inside the housing 20. The upper end of the heat exchanger 1 is located on the front side of the housing 20, and the lower end is located on the rear side of the housing 20. By arranging the heat exchanger 1 in this manner, it is possible to increase the size of the heat exchanger 1 while keeping the dimension of the housing 20 small in the Y direction. This allows the air conditioning device 100 to improve its heat exchange performance.

[0032] A sprinkler mechanism 10 is disposed above the primary space 22. This sprinkler mechanism 10 may be referred to as a first sprinkler mechanism 10a. The sprinkler mechanism 10 is disposed opposite the surface 1a of the heat exchanger 1 facing the suction port 21, and is preferably disposed in a region above the center of the heat exchanger 1. That is, in the cross-sectional structure shown in FIG. 4 , the sprinkler mechanism 10 is disposed in the narrower region of the wedge-shaped space formed between the heat exchanger 1 and the front surface of the housing 20. This configuration enables the sprinkler mechanism 10 to spray water onto the surface 1a of the heat exchanger 1 while minimizing resistance to the flow of air flowing from the suction port 21 into the primary space 22.

[0033] The air conditioning apparatus 100 also has a sprinkler mechanism 10 installed in the secondary space 23. This sprinkler mechanism 10 is sometimes referred to as the second sprinkler mechanism 10b. The sprinkler mechanism 10 installed in the secondary space 23 is preferably installed on an imaginary line L extending from the center of the heat exchanger 1 in the normal direction to the surface 1b. Furthermore, by installing the second sprinkler mechanism 10b as close to the rear panel 28 as possible, it is possible to efficiently spray cleaning water onto the surface 1b of the heat exchanger 1 while minimizing resistance to the flow of air that has passed through the heat exchanger 1. However, in the secondary space 23, the placement of the sprinkler mechanism 10 is not limited to the position shown in FIG. 4, but it is preferable that it be located near the front panel 26 or the rear panel 28.

[0034] 5 is a schematic diagram showing an example of a sprinkler mechanism 10 installed in the air conditioning apparatus 100 according to Embodiment 1. The sprinkler mechanism 10 is configured so that the direction in which cleansing water is sprayed can be changed, and includes a spray unit 8 provided with a plurality of nozzles 8a, an electromagnetic valve 9 provided at one end of the spray unit 8, and a drive unit 7 provided at the other end of the spray unit 8.

[0035] The spray unit 8 is configured to allow cleaning water to flow through it, and the cleaning water is sprayed from an outlet 8a. The solenoid valve 9 and the spray unit 8 are connected by, for example, a rotary joint 8b. The spray unit 8 is configured to be rotatable around an axis extending in the longitudinal direction of the spray unit 8 relative to the fixed solenoid valve 9. In other words, the outlet 8a moves up and down in Figure 5, and can change the spray direction of the cleaning water. The drive unit 7 includes, for example, a power transmission mechanism such as a motor and gears, and rotates the spray unit 8.

[0036] The electromagnetic valve 9 controls the flow of cleaning water sprayed from the spray unit 8. The control device 50 controls the opening and closing of the electromagnetic valve 9, and controls the spraying and stopping of cleaning water from the spray unit 8.

[0037] A pipe is connected to the electromagnetic valve 9, and cleaning water is supplied from the outside. As shown in Figure 3, the electromagnetic valve 9 is installed on the side of the housing 20, and a pipe (not shown) is connected to the electromagnetic valve 9. The water sprinkler mechanism 10 may be installed inside the housing 20, including the electromagnetic valve 9, or may be partially installed outside the housing 20.

[0038] In the air conditioning apparatus 100 according to the first embodiment, a sprinkler mechanism 10 is installed in each of the primary space 22 and the secondary space 23. The multiple sprinkler mechanisms 10 may have the same structure or different structures.

[0039] The sprinkler mechanism 10 is not limited to the structure shown in Fig. 5 and may be, for example, a plurality of nozzles connected to a pipe that supplies cleaning water. However, by adopting a structure in which a tubular spray unit 8 having a length approximately the same as the width of the heat exchanger 1 as shown in Fig. 5 rotates, the area occupied by the sprinkler mechanism 10 in the air passage can be kept small, allowing the heat exchanger 1 to be cleaned while reducing air flow resistance.

[0040] (Regarding operation during cleaning of air conditioning apparatus 100) Figure 6 is a control flowchart during cleaning of heat exchanger 1 of air conditioning apparatus 100 according to embodiment 1. The air conditioning apparatus 100 according to embodiment 1 allows an operator to clean the internal heat exchanger 1 without removing the panel of the housing 20 to perform internal cleaning work. The air conditioning apparatus 100 is equipped with a control device 50, which controls the operation of the refrigeration cycle circuit and the sprinkler mechanism 10.

[0041] The control device 50 includes a memory 51 that stores information for determining each control value. The control device 50 may be configured as hardware such as a control circuit that realizes its functions. The control device 50 may also be configured as a software program stored in a storage unit such as a semiconductor memory, and a computing device 52 such as a microcomputer or CPU (Central Processing Unit) that executes the software program. The control device 50 may be installed in the indoor unit 200 or the outdoor unit 201, or may be provided independently.

[0042] When cleaning begins, the air conditioner 100 stops the refrigeration cycle circuit and the blower 3, and stops air conditioning operation (step S1). After the operation of the air conditioner 100 is stopped, water sprinkling begins. When the solenoid valve 9 opens, cleaning water is supplied to the interior of the spray unit 8 of the sprinkler mechanism 10, and the cleaning water is sprayed from the nozzle 8a toward the heat exchanger 1 (step S2). The cleaning water is sprayed from the sprinkler mechanisms 10 installed in both the primary space 22 and the secondary space 23. The drive unit 7 is also driven, and the spray unit 8 rotates by a predetermined angle, spraying the cleaning water from the top to the bottom of the heat exchanger 1. The cleaning water falls from the heat exchanger 1 into the drain pan 29 and is discharged outside the device.

[0043] After the spraying of cleaning water has been carried out for a predetermined time, the solenoid valve 9 is closed and the drive unit 7 is also stopped (step S3). This stops the spraying of cleaning water. After the spraying of cleaning water has stopped, the blower 3 is driven to blow air into the air duct and dry the inside of the air conditioning device 100 (step S4).

[0044] In addition, the blower 3 is driven and the heating operation of the refrigeration cycle circuit is started (step S5). The heating operation causes high-temperature refrigerant to flow through the heat exchanger 1, which further promotes drying. This completes the cleaning operation.

[0045] It is to be noted that only one of step S4 and step S5 may be performed, or neither may be performed and the product may be allowed to dry naturally.

[0046] As described above, the air conditioning apparatus 100 can perform a cleaning operation and clean the interior without opening or closing the panels of the housing 20. Furthermore, the sprinkler mechanism 10 is positioned in a location within the air duct that is unlikely to create air resistance, and structurally occupies a small area within the air duct, so it is possible to clean the interior and maintain hygiene while minimizing the impact on normal air conditioning capacity.

[0047] Embodiment 2 The air conditioning apparatus 100 according to Embodiment 2 is different from the air conditioning apparatus 100 according to Embodiment 1 in that the arrangement of the sprinkler mechanism 10 is changed. The following description will focus on the differences between Embodiment 2 and Embodiment 1.

[0048] 7 is a schematic diagram of the cross-sectional structure of an air conditioning apparatus 100 pertaining to embodiment 2. In the air conditioning apparatus 100 pertaining to embodiment 2, a sprinkler mechanism 10 is further added to the secondary space 23. The added sprinkler mechanism 10 is disposed on the front side of the housing 20, and is disposed above the upper end of the heat exchanger 1. This is referred to as a third sprinkler mechanism 10c.

[0049] The third sprinkler mechanism 10c has a structure similar to that of the first sprinkler mechanism 10a and the second sprinkler mechanism 10b, and is capable of not only spraying cleaning water onto the upper end of the heat exchanger 1, but also onto the casing 3a of the blower 3.

[0050] The third sprinkler mechanism 10c is positioned closer to the front of the housing 20 than the center of the heat exchanger 1 in the Y direction, and is installed as close to the front panel 26 as possible, thereby reducing air flow resistance.

[0051] By providing third sprinkler mechanism 10c, second sprinkler mechanism 10b, which is disposed on imaginary line L extending from the center of heat exchanger 1 in the normal direction to surface 1b, may be moved downward. Because third sprinkler mechanism 10c can spray cleaning water toward the upper end of heat exchanger 1, even if second sprinkler mechanism 10b is moved toward the lower end of heat exchanger 1, second sprinkler mechanism 10b and third sprinkler mechanism 10c can spray cleaning water over the entire area of ​​heat exchanger 1, from the upper end to the lower end.

[0052] Furthermore, second sprinkler mechanism 10b may remain in the same arrangement as in embodiment 1 shown in Fig. 4. In this case, second sprinkler mechanism 10b can spray cleaning water onto the rear side of casing 3a of blower 3, and third sprinkler mechanism 10c can spray cleaning water onto the front side of casing 3a.

[0053] Furthermore, by arranging multiple sprinkler mechanisms 10 in the secondary space 23, the surface 1b of the heat exchanger 1 facing the secondary space 23 can be cleaned more efficiently. By spraying cleaning water from the secondary space 23 side, the cleaning water flows from the secondary space 23 side to the primary space 22 side, thereby cleaning the surface 1a on the primary space 22 side as well. Therefore, the air conditioning apparatus 100 according to the second embodiment can more efficiently clean the heat exchanger 1 and can also clean the casing 3a of the blower 3, which is normally difficult to clean. As a result, the air conditioning apparatus 100 can be cleaned without removing the panels of the housing 20, and the secondary space 23, which is normally difficult to clean, can be kept hygienic.

[0054] As described above, the first and second embodiments of the present disclosure have been described. However, the first and second embodiments are merely examples of the air conditioning apparatus 100 and may be combined with other known technologies. Furthermore, the structure of the air conditioning apparatus 100 used as the indoor unit 200 has been described. However, the structure capable of being cleaned by the sprinkler mechanism 10 described above may also be applied to the outdoor unit 201. The configuration of the air conditioning apparatus 100 may be partially omitted or modified without departing from the spirit of the present disclosure. In short, the air conditioning apparatus 100 includes the range of design modifications and application variations that would normally be made by a person skilled in the art, without departing from the technical concept thereof.

[0055] REFERENCE SIGNS LIST 1 (indoor) heat exchanger, 1a surface, 1b surface, 3 (indoor) blower, 3a casing, 3b blade portion, 4 motor, 5 expansion valve, 7 drive unit, 8 spray unit, 8a injection port, 8b rotary joint, 9 solenoid valve, 10 sprinkler mechanism, 10a first sprinkler mechanism, 10b second sprinkler mechanism, 10c third sprinkler mechanism, 20 housing, 21 intake port, 22 primary side space, 23 secondary side space, 24 outlet, 25 lower front panel, 26 front panel, 27 side panel, 28 rear panel, 29 drain pan, 50 control device, 51 memory, 52 arithmetic unit, 100 air conditioning device, 101 outdoor heat exchanger, 102 compressor, 103 outdoor blower, 104 motor, 105 four-way valve, 106 Refrigerant piping, 200 indoor unit, 201 outdoor unit, 204 refrigerant piping, 1000 air conditioning system, L virtual line.

Claims

1. a housing having an air intake on a front surface thereof, an air outlet on an upper portion thereof, and an air passage formed from the air intake to the air outlet; a blower installed in the air passage; a heat exchanger disposed upstream of the fan in the air passage; a plurality of sprinkler mechanisms disposed in the air passage and configured to spray fluid toward at least the heat exchanger; The heat exchanger comprises: The air passage inside the housing is divided into a primary side space that is a space below the heat exchanger and is closer to the intake port than the heat exchanger, and a secondary side space that is a space above the heat exchanger and is closer to the outlet port than the heat exchanger, The plurality of water spray mechanisms include: a first sprinkler mechanism disposed in the primary space and a second sprinkler mechanism disposed in the secondary space, The second water sprinkling mechanism is The air conditioning apparatus is positioned behind the center of the heat exchanger in the front-to-rear direction of the housing.

2. The heat exchanger comprises: The top end is located on the front side and the bottom end is located on the back side, The first water sprinkling mechanism is The air conditioning apparatus according to claim 1 , wherein the air conditioner is disposed above the center of the heat exchanger.

3. The second water sprinkling mechanism is The air conditioning apparatus according to claim 1 , wherein the fluid is injected into a fan casing that covers the blower.

4. The plurality of water spray mechanisms include: Further, a third sprinkler mechanism is provided in the secondary space. The third water sprinkling mechanism is The air conditioner according to any one of claims 1 to 3, wherein a fluid is injected at least onto a fan casing that covers the blower.

5. The third water sprinkling mechanism is The air conditioning apparatus according to claim 4 , wherein the cooling fan is disposed closer to the front than the center of the heat exchanger and higher than the upper end of the heat exchanger in the front-rear direction of the housing.

6. The plurality of water spray mechanisms include: The air conditioner according to any one of claims 1 to 3, which is rotationally driven while spraying fluid.

7. A control device for controlling the operation of the air conditioning device is provided, The control device The air conditioner according to claim 6, wherein a cleaning operation is carried out during shutdown by spraying fluid from the plurality of sprinkler mechanisms onto the heat exchanger and rotating the plurality of sprinkler mechanisms.

8. The control device The air conditioning apparatus according to claim 7, wherein a drying operation is carried out in which the blower is driven while the spraying of fluid and rotation of the plurality of sprinkler mechanisms are stopped.

9. The control device The air conditioner according to claim 8 , wherein a heating operation is further carried out during the drying operation.