Air conditioner

Abstract

An air conditioner according to the present invention comprises a tank that holds water, a heat exchanger that has a first heat exchange passage through which discharge air flows and a second heat exchange passage through which supply air flows and that exchanges heat between the discharge air and the supply air, a water supply body that supplies water to the first heat exchange passage, and a water supply end part that is for supplying the water held in the tank to the water supply body. The water supply body includes a plurality of water supply holes that are formed along the longitudinal direction and a flow rate restriction part that restricts the flow rate of the water supplied from the water supply end part to any of the water supply holes of the plurality of water supply holes.

Description

air conditioner

[0001] The present invention relates to an air conditioner.

[0002] Evaporative cooling air conditioners are known that draw in indoor air, use the heat of vaporization of water to lower the ambient temperature, and then blow the cooled air out into the room, as shown in, for example, Patent Document 1. In the air conditioner of Patent Document 1, air flowing through the second flow path passes through multiple tubes of a sensible heat exchanger, and air flowing through the first flow path passes around the multiple tubes. As a result, heat is exchanged between the air flowing through the second flow path and the air flowing through the first flow path.

[0003] JP 2014-092338 A

[0004] However, in the air conditioner of Patent Document 1, no consideration is given to providing an air conditioner with higher usability.

[0005] The present invention has been made in view of the above circumstances, and has as its object to provide an air conditioner that is more useful.

[0006] An air conditioner according to one aspect of the present disclosure has a tank for holding water, a first heat exchange passage through which exhaust air flows, and a second heat exchange passage through which supply air flows, and is equipped with a heat exchanger for exchanging heat between the exhaust air and the supply air, a water supply body for supplying water to the first heat exchange passage, and a water supply end for supplying water held in the tank to the water supply body, and the water supply body includes a plurality of water supply holes formed along the longitudinal direction and a flow rate restriction section for restricting the flow rate of water supplied from the water supply end to any one of the plurality of water supply holes.

[0007] It is possible to provide a highly useful air conditioner.

[0008] 1 is a schematic side cross-sectional view showing an example of a configuration of an air conditioner according to a first embodiment. FIG. 2 is a perspective view showing the appearance of the air conditioner. FIG. 3 is an explanatory view showing the attachment and detachment of each component in the appearance of the air conditioner. FIG. 4 is a schematic side cross-sectional view showing an example of a configuration of a lever. FIG. 5 is a schematic perspective view showing an example of a configuration of a link mechanism. FIG. 6 is a schematic side cross-sectional view showing a sealing member in a heat exchanger. FIG. 7 is a schematic side cross-sectional view showing a state in which an intermediate flow path is connected. FIG. 8 is a schematic side cross-sectional view showing a state in which an intermediate flow path is separated. FIG. 9 is a schematic side cross-sectional view showing a positional relationship between a lever and a cover when the heat exchanger is attached. FIG. 10 is a schematic side cross-sectional view showing a positional relationship between a lever and a cover when the heat exchanger is removed. FIG. 11 is a schematic perspective view showing an exhaust flow path including a branch portion. FIG. 12 is a schematic perspective cross-sectional view showing a power supply board arranged in the exhaust flow path. FIG. 13 is a schematic side cross-sectional view showing the appearance of a through-hole formed in the exhaust flow path. FIG. 14 is a schematic perspective view showing a water absorbing member and a dripping member arranged at both ends below the heat exchanger. FIG. 15 is a schematic side cross-sectional view showing the arrangement of the water absorbing member and the dripping member. FIG. 16 is a schematic perspective view showing the arrangement of the water absorbing member. 1 is a schematic perspective view showing a water absorption member and a dripping member arranged centrally below a heat exchanger. FIG. 2 is a schematic side cross-sectional view showing an engaged state of the first tank and the second tank. FIG. 3 is a schematic side cross-sectional view showing a disengaged state of the first tank and the second tank. FIG. 4 is a schematic perspective view showing the second tank and the lid. FIG. 5 is a schematic side cross-sectional view of the second tank when installed inside. FIG. 6 is a schematic side cross-sectional view showing a main body side shut-off valve and a second tank side shut-off valve. FIG. 7 is an explanatory diagram showing the state transitions of the main body side shut-off valve and the second tank side shut-off valve. FIG. 8 is a schematic perspective view showing a water supply body located above a heat exchanger. FIG. 9 is a schematic side cross-sectional view of the water supply body.

[0009] (Embodiment 1) Hereinafter, an embodiment will be described with reference to the drawings. FIG. 1 is a schematic side cross-sectional view showing an example of the configuration of an air conditioner 1 according to embodiment 1. The air conditioner 1 has a box-shaped main body 11, and is placed on the floor of a space to be air-conditioned, such as a factory, using casters provided on the bottom of the main body 11. The main body 11 includes a housing that forms the outer shell of the air conditioner 1, and various components, which will be described later, are housed within the main body 11. The placed state of the air conditioner 1 shown in FIG. 1 is shown from above, below, left, and right as a normal usage mode of the air conditioner 1. Note that FIG. 1 is a schematic view of a cross section taken along line A-A in FIG. 2, viewed from the left side of FIG. 2.

[0010] The air conditioner 1 includes a tank 7 consisting of a first tank 71 and a second tank 72 for storing water, an evaporative filter 21, and a cooling unit 2 including a heat exchanger 22. The air conditioner 1 uses the evaporative filter 21 to lower the ambient temperature using the heat of vaporization of water supplied from the second tank 72, thereby cooling the space to be air-conditioned, and is an evaporative cooling type air conditioner 1. Furthermore, the air conditioner 1 uses the sensible heat and heat of vaporization of the water supplied from the second tank 72 to lower the ambient temperature and cool the space to be air-conditioned using the heat exchanger 22. The heat exchanger 22 functions as a sensible heat exchanger that exchanges sensible heat between a first heat exchange flow path 221 through which exhaust air flows and a second heat exchange flow path 222 through which supply air flows.

[0011] The main body 11 of the air conditioner 1 is provided with an inlet 3 that draws in air from the space to be conditioned, an air supply outlet 51, and an exhaust outlet 43. The air supply outlet 51 blows out, as supply air, air that has passed through a cooling unit 2 including a heat exchanger 22 and an evaporative filter 21 and been cooled by the cooling unit 2 into the space to be conditioned. The exhaust outlet 43 blows out, as exhaust air, air that has passed through the heat exchanger 22 and has exchanged sensible heat with water and the supply air.

[0012] The supply air outlet 51 and the exhaust air outlet 43 are provided on the top surface 100 of the main body 11. The air conditioner 1 is equipped with fans for transporting supply air and exhaust air. The fans include an exhaust fan 61 that transports exhaust air and an supply air fan 62 that transports supply air. A cylindrical duct may be disposed in the supply air outlet 51.

[0013] The intake fan 62 and the exhaust fan 61 may be, for example, centrifugal fans such as sirocco fans or propeller fans. The intake fan 62 is provided near the intake air outlet 51, and the exhaust fan 61 is provided near the exhaust air outlet 43. In other words, if the air flow in the air conditioner 1 is such that the intake port 3 is the most upstream end and the intake air outlet 51 and the exhaust air outlet 43 are the most downstream ends, the intake fan 62 and the exhaust fan 61 are provided downstream of the cooling unit 2 in the air flow direction. Therefore, the intake air fan 62 and the exhaust fan 61 function as so-called suction fans and can maintain negative pressure within the air flow path in the air conditioner 1, i.e., the exhaust air flow path 4 and the intake air flow path 5. The exhaust air flow path 4 corresponds to the first flow path through which exhaust air flows. The intake air flow path 5 corresponds to the second flow path through which intake air flows.

[0014] The heat exchanger 22 functions as a sensible heat exchanger and includes a first heat exchange flow path 221 through which air flows and a second heat exchange flow path 222 through which air flows that exchanges sensible heat with the air flowing through the first heat exchange flow path 221. The main body 11 of the air conditioner 1 has an exhaust flow path 4 that communicates with the first heat exchange flow path 221, and an intermediate flow path 41 (described below) is disposed between the first heat exchange flow path 221 and the exhaust flow path 4. That is, the first heat exchange flow path 221 of the heat exchanger 22 and the exhaust flow path 4 of the main body 11 communicate with each other via the intermediate flow path 41. Therefore, the flow path through which exhaust air flows throughout the entire air conditioner 1 includes the first heat exchange flow path 221 of the heat exchanger 22, the exhaust flow path 4 of the main body 11, and the intermediate flow path 41.

[0015] The supply air fan 62 and the exhaust air fan 61 share a single fan motor 6, and are connected to shafts provided at both ends of the fan motor 6. For example, a partition plate is provided between the supply air fan 62 and the exhaust air fan 61. This partition plate reliably prevents the supply air transported by the supply air fan 62 and the exhaust air transported by the exhaust fan 61 from mixing. The volumetric flow rate of air transported per unit time by the supply air fan 62 may be greater than the volumetric flow rate of air transported per unit time by the exhaust fan 61. By making the volumetric flow rate of the supply air fan 62 greater than the volumetric flow rate of the exhaust fan 61, the air conditioning capacity can be improved.

[0016] The fan motor 6 is disposed in the exhaust flow path 4. In other words, the partition plate is provided between the fan motor 6 and the supply fan 62. By providing the fan motor 6 in this manner, it is possible to cool the fan motor 6 by the exhaust air transported by the exhaust fan 61. Therefore, it is possible to efficiently cool the fan motor 6 by utilizing the cold heat from the exhaust air without raising the temperature of the supply air transported by the supply fan 62. Furthermore, the exhaust air that has passed through the exhaust fan 61 directly hits the power supply board 12, thereby cooling the power supply board 12.

[0017] The main body 11 of the air conditioner 1 is provided with an intake passage 32, an air supply passage 5, and an exhaust passage 4 as air circulation paths. The intake passage 32 starts at the air intake port 3 and is connected to the heat exchanger 22 and a drain pan 91 located below the heat exchanger 22. That is, after passing through a dust collection filter 31 arranged to cover the air intake port 3, the intake passage 32 branches into an exhaust passage 4 that communicates with the first heat exchange passage 221 of the heat exchanger 22, and an air supply passage 5 that communicates with the drain pan 91. The branching points correspond to the starting points of the exhaust passage 4 and the air supply passage 5.

[0018] The first heat exchange flow path 221 and the second heat exchange flow path 222 in the heat exchanger 22 are configured by stacking multiple membrane members and spacers alternately. Adjacent spacers in the stacking direction are arranged with their longitudinal directions rotated 90 degrees relative to each other, and adjacent spacers separated by the same membrane member intersect with each other, so that the first heat exchange flow path 221 and the second heat exchange flow path 222 are perpendicular to each other, and a cross flow is formed between the supply air flowing through the second heat exchange flow path 222 and the exhaust air flowing through the first heat exchange flow path 221.

[0019] Sensible heat exchange occurs between the supply air flowing through the second heat exchange passage 222 and the exhaust air flowing through the first heat exchange passage 221 via each of the stacked membrane members. The stacking direction of these stacked membrane members is perpendicular to the respective path directions of the first heat exchange passage 221 and the second heat exchange passage 222. That is, in this embodiment, the path direction of the second heat exchange passage 222 is from left to right, and the path direction of the first heat exchange passage 221 is from bottom to top, whereas the stacking direction is the front-to-back direction, which is perpendicular to both the left-right and top-to-bottom directions.

[0020] The first heat exchange passage 221 through which the exhaust air flows communicates with the exhaust air outlet 43 via a portion of the exhaust air passage 4 provided in the main body 11. The second heat exchange passage 222 through which the supply air flows communicates with the supply air outlet 51 via a portion of the supply air passage 5 provided in the main body 11. The second heat exchange passage 222 through which the supply air flows communicates with the heat exchangers 22 in the left-right direction, i.e., horizontal direction, while the first heat exchange passage 221 through which the exhaust air flows communicates with the heat exchangers 22 in the up-down direction, i.e., vertical direction. In this way, the second heat exchange passage 222 and the first heat exchange passage 221 are perpendicular to each other.

[0021] A portion of the intake air that has passed through the intake passage 32 flows into the second heat exchange passage 222 of the heat exchanger 22. Furthermore, a portion of the intake air that has passed through the intake passage 32 flows into the gap between the dust collection filter 31 and the second heat exchange passage 222, into the gap between the drain pan 91 and the heat exchanger 22, and then flows into the first heat exchange passage 221 of the heat exchanger 22. As a result, the intake air that has passed through the intake passage 32 is divided into supply air that flows into the second heat exchange passage 222 and exhaust air that flows into the first heat exchange passage 221. In other words, the second heat exchange passage 222 and the first heat exchange passage 221 provided in the heat exchanger 22 form a flow dividing mechanism that divides the intake air.

[0022] A dust collection filter 31 is provided between the air inlet 3 and the inlets of the first heat exchange flow path 221 and the second heat exchange flow path 222. The dust collection filter 31 may be configured as one unit with the cover 111 that is detachably attached to the main body 11. By providing the dust collection filter 31, dust in the intake air drawn in through the air inlet 3 can be captured, and adhesion of dust to the air flow path within the air conditioner 1 can be suppressed.

[0023] A drain pan 91 is provided below the inlet of the first heat exchange flow path 221 in the heat exchanger 22. The exhaust gas that passes between the drain pan 91 and the heat exchanger 22, i.e., through the upper space of the drain pan 91, flows into the heat exchanger 22 from the inlet of the first heat exchange flow path 221. Therefore, the exhaust flow path 4 includes the space between the drain pan 91 and the inlet of the first heat exchange flow path 221.

[0024] The exhaust gas that flows into the heat exchanger 22 from the inlet of the first heat exchange flow path 221 flows out of the heat exchanger 22 from the outlet of the first heat exchange flow path 221. The outlet of the first heat exchange flow path 221 is formed in the upper part of the heat exchanger 22. An exhaust fan 61 is disposed above the outlet of the first heat exchange flow path 221 formed in the upper part of the heat exchanger 22. The exhaust gas transported by the exhaust fan 61 is blown out from the exhaust outlet 43. As will be described in detail later, a portion of the exhaust gas transported by the exhaust fan 61 passes through a second downstream exhaust flow path 422 branched from the exhaust flow path 4, cools the power supply board 12 disposed inside the second downstream exhaust flow path 422, and is then discharged to the outside of the main body 11 from a branch exhaust outlet 427. The branch exhaust outlet 427 may be formed, for example, in a gap in an exterior panel of the main body 11. In other words, the second downstream exhaust flow path 422 may be connected to a gap in the main body 11.

[0025] The second heat exchange passage 222 is provided linearly in a region where a cross flow with the first heat exchange passage 221 is formed. That is, the outlet at the end of the second heat exchange passage 222 is provided on the side surface of the heat exchanger 22 opposite to the side surface on which the inlet of the second heat exchange passage 222 is provided. In the illustrated example, the second heat exchange passage 222 is provided linearly from the front surface to the rear surface of the heat exchanger 22.

[0026] In the flow direction of the supply air, an evaporation filter 21 is provided at the end of the second heat exchange passage 222 of the heat exchanger 22, i.e., downstream of the outlet of the second heat exchange passage 222. The evaporation filter 21 is provided in the supply air passage 5, between the heat exchanger 22 and the supply air fan 62.

[0027] The vaporization filter 21 is provided with one surface of the rectangular filter element facing the side surface of the heat exchanger 22 on which the outlet of the second heat exchange flow path 222 is provided. The air supply flow path 5 from the vaporization filter 21 to the air supply outlet 51 extends upward from the vaporization filter 21. An air supply fan 62 for transporting the air is disposed in the air supply flow path 5 from the vaporization filter 21 to the air supply outlet 51. The air supply fan 62 is provided above the vaporization filter 21. The air supply transported by the air supply fan 62 is blown out from the air supply outlet 51 into the space to be air-conditioned.

[0028] As described above, the air conditioner 1 includes the tank 7 that stores water to be supplied to the evaporative filter 21 and the heat exchanger 22. The tank 7 includes a first tank 71 and a second tank 72. The first tank 71 is, for example, a rectangular box body 721, and is disposed below the evaporative filter 21 and the drain pan 91. Two first tanks 71 may be mounted on the main body 11 of the air conditioner 1.

[0029] The second tank 72 has, for example, a rectangular box body 721 and is disposed below the first tank 71. The capacity of the second tank 72 may be smaller than the capacity of the first tank 71. The first tank 71 functions as a main tank that stores water supplied from a water supply or the like. The second tank 72 functions as a sub-tank that stores water supplied from the first tank 71 when the first tank 71 and the second tank 72 are installed inside the main body 11 of the air conditioner 1. The water stored in the second tank 72 is supplied to the heat exchanger 22 and the evaporative filter 21 included in the cooling unit 2.

[0030] The second tank 72 stores the recovered water via a recovery water channel 9 for recovering water remaining in the cooling unit 2. The second tank 72 and a drain pan 91 are connected via the recovery water channel 9. The evaporation filter 21 and the heat exchanger 22 are disposed above the drain pan 91. The drain pan 91 recovers water that has been supplied from the second tank 72 to the evaporation filter 21 and the first heat exchange flow path 221 of the heat exchanger 22 and remains in a liquid state without being evaporated.

[0031] A second tank-side shutoff valve 73 is disposed in the second tank 72, and a main body-side shutoff valve 81 is disposed in the main body 11. The second tank-side shutoff valve 73 and the main body-side shutoff valve 81 are both opened when joined together. The second tank 72 and the pump 82 are connected via a supply water passage 8, and the second tank-side shutoff valve 73 and the main body-side shutoff valve 81 are disposed in the supply water passage 8 between the second tank 72 and the pump 82. The pump 82 may be disposed at the bottom of the supply water passage 8. Driving the pump 82 transports water from the second tank 72 through the supply water passage 8. The supply water passage 8 may be formed of a hollow pipe made of resin or metal.

[0032] The pump 82 is connected to a controller, such as a microcomputer, via a communication line, and is driven or stopped based on a control signal output from the controller. The controller may be a control board separate from the power supply board 12, and may be disposed inside the exhaust flow path 4 located above the main body 11, similar to the power supply board 12. Alternatively, the controller may be formed of a microcomputer or the like mounted on the power supply board 12.

[0033] The pump 82 is connected to the vaporization filter 21 and the heat exchanger 22 via the supply water passage 8. Therefore, the second tank 72 is connected to the vaporization filter 21 and the heat exchanger 22 via the pump 82 and the supply water passage 8. The supply water passage 8 branches into multiple paths near the vaporization filter 21 and the heat exchanger 22. In this embodiment, the supply water passage 8 branches into four paths, and one of the branches connects to the vaporization filter water supply section 211 of the vaporization filter 21. Of the four branched supply water passages 8, three of them connect to three water supply bodies 26 located above the outlet of the first heat exchange flow path 221 of the heat exchanger 22. Each of the three water supply bodies 26 functions as a sensible heat exchanger water supply section that supplies water to the first heat exchange flow path 221 of the heat exchanger 22. The connection between the supply water channel 8 and the water supply body 26 functions as the water supply end 25. That is, the tip of the supply water channel 8 that is connected to the water supply body 26 corresponds to the water supply end 25.

[0034] The water supplied from the water supply passage 8 is temporarily held in the water supply section 211 for the vaporization filter provided at the top of the vaporization filter 21. Then, the water drips onto the vaporization filter 21 from holes provided in the water supply section 211 for the vaporization filter and permeates into the vaporization filter 21. The water supplied from the water supply passage 8 drips into the first heat exchange flow path 221 of the heat exchanger 22 via the water supply body 26 provided at the top of the heat exchanger 22.

[0035] A pump 82 provided in the supply water passage 8 transports water from the second tank 72 to the evaporative filter 21 and the heat exchanger 22. Water that does not evaporate in the evaporative filter 21 and the heat exchanger 22 and remains in liquid form is collected by gravity in a drain pan 91 and returned from the drain pan 91 to the second tank 72 via the recovery water passage 9. In other words, a water circulation passage is formed by the second tank 72, the supply water passage 8, the cooling unit 2, the drain pan 91, and the recovery water passage 9. When the amount of water stored in the second tank 72 falls below a predetermined value, water is supplied from the first tank 71 to the second tank 72.

[0036] The first tank 71 has, for example, a rectangular box shape and is disposed above the second tank 72 with a water supply tube portion 712 provided on the bottom surface facing downward. The first tank 71 is, for example, detachably provided to the main body 11, and may be stored inside the main body 11 after being removed from the main body 11 and refilled with tap water or the like. The volume of the first tank 71 is larger than the volume of the second tank 72. In this embodiment, two first tanks 71 are provided, and the total volume of the two first tanks 71 is larger than the volume of the second tank 72. The number of first tanks 71 is not limited to two, and may be one or three or more.

[0037] Water supplied from the second tank 72 drips through the water supply body 26 provided above the heat exchanger 22 into the first heat exchange flow path 221, through which the exhaust gas flows. In other words, the first heat exchange flow path 221 is a mixture of exhaust gas flowing from bottom to top and water dripping from the water supply body 26 and flowing from top to bottom. The water stored in the second tank 72 is water recovered from the evaporative filter 21 and is cooled by the heat of vaporization. Therefore, the temperature of the water supplied from the second tank 72 is lower than the temperature of the exhaust gas immediately after it flows into the first heat exchange flow path 221. The exhaust gas exchanges sensible heat with the water dripping from the water supply body 26, i.e., is cooled by the water. Each exhaust path 231 constituting the first heat exchange flow path 221 is composed of a plate member 232 with a nonwoven fabric attached to its surface, which functions as a membrane member. The water dripping from the water supply body 26 adheres to the nonwoven fabric, increasing the surface area of ​​the water in contact with the exhaust gas. As a result, some of the water dripping from the water supply body 26 evaporates, and the heat of evaporation also further cools the exhaust gas.

[0038] The exhaust air flowing through the first heat exchange flow path 221 of the heat exchanger 22 and the supply air flowing through the second heat exchange flow path 222 cross each other, and sensible heat is exchanged between the supply air and the exhaust air. As described above, the exhaust air flowing through the first heat exchange flow path 221 is cooled by water supplied from the second tank 72, and the supply air is cooled by the exhaust air cooled by the water supplied from the second tank 72. Furthermore, the supply air may be cooled by the sensible heat or latent heat of vaporization of water attached to a film member that forms the exhaust path 231 that constitutes the first heat exchange flow path 221, using the film member as a heat transfer member.

[0039] The supply air that has passed through the outlet of the second heat exchange flow path 222 of the heat exchanger 22 flows into the supply air flow path 5 that runs from the heat exchanger 22 to the supply air outlet 51. In the supply air flow path 5, a vaporization filter 21 is provided downstream of the heat exchanger 22, and the supply air passes through the vaporization filter 21.

[0040] Water supplied from the second tank 72 drips onto the vaporization filter 21 via the vaporization filter water supply section 211 provided above the vaporization filter 21. Because negative pressure is maintained within the air intake flow path 5, the water supplied from the second tank 72 is sucked into the vaporization filter 21 through holes provided in the bottom surface of the vaporization filter water supply section 211 and permeates into the vaporization filter 21. The water that permeates the vaporization filter 21 is promoted by the supply air passing through the vaporization filter 21, and vaporizes, i.e., evaporates into water vapor, which is then contained in the supply air. The heat of evaporation cools the supply air, lowering its temperature. The cooled supply air is blown out by the supply air fan 62 from the supply air outlet 51 into the space to be air-conditioned.

[0041] With this configuration, the supply air blown into the conditioned space can be cooled in two stages, including primary cooling by the heat exchanger 22 and secondary cooling by the evaporative filter 21. Therefore, the temperature of the supply air can be further reduced compared to, for example, a direct evaporation method that uses only the evaporative filter 21.

[0042] The exhaust air that flows into the first heat exchange flow path 221 of the heat exchanger 22 is mixed with water dripping from the water supply body 26 and transported toward the outlet of the first heat exchange flow path 221 located above the heat exchanger 22. Because the first heat exchange flow path 221 extends from below to above the heat exchanger 22, the exhaust air mixed with the water supplied from the water supply body 26 flows from below to above the heat exchanger 22. The water supply bodies 26 are elongated and arranged in parallel in the short direction. The exhaust air that has passed through the outlet of the first heat exchange flow path 221 passes between the water supply bodies 26 arranged in parallel in this manner, reaches the exhaust fan 61, and is then blown out from the exhaust outlet 43.

[0043] FIG. 2 is a perspective view showing the exterior of the air conditioner 1. FIG. 3 is an explanatory diagram showing the attachment and detachment of each component in the exterior of the air conditioner 1. The main body 11 of the air conditioner 1 is rectangular parallelepiped-shaped and has an upper surface 100, a lower surface 105, and side surfaces. The side surfaces include a first side surface 101, a second side surface 103, a third side surface 103, and a fourth side surface 104 located on the front, rear, left, and right sides. In this embodiment, the first side surface 101 corresponds to the front surface. The second side surface 102 corresponds to the right surface. The third side surface 103 corresponds to the rear surface. The fourth side surface 104 corresponds to the left surface.

[0044] The top surface 100 is formed with an intake air outlet 51 to which a duct is attached, and an exhaust air outlet 43. A removable opening 112 is formed in a first side surface 101, which corresponds to the front surface. A cover 111 is attached to the removable opening 112. In other words, the cover 111 is removably attached so as to cover the removable opening 112. A dust collection filter 31 is integrally disposed on the cover 111. A lever 16 is disposed above the removable opening 112 and is operated when removing the case 24 from the main body 11. A passage 113 is formed below the removable opening 112 on the first side surface 101, through which the first tank 71 and the second tank 72 are stored. A first tank housing section 13 for housing the first tank 71 and a second tank housing section 14 for housing the second tank 72 are formed at the back of the opening.

[0045] By removing the cover 111 from the main body 11, the heat exchanger 22 housed in the case 24 is exposed through the attachment / detachment opening 112 so as to be visible from outside the main body 11. A grip portion 241 is formed on the case 24, and the case 24 can be pulled out from the main body 11 by gripping the grip portion 241. As will be described in detail later, when removing the case 24 from the main body 11 through the attachment / detachment opening 112, the connection between the seal member 233 of the case 24 and the intermediate flow path 41 formed by the frame 15 is released by operating the lever 16. This prevents the seal member 233 of the case 24 from wearing out.

[0046] The first tank 71 and the second tank 72 are configured to be removable from the main body 11, similar to the case 24. That is, the first side surface 101 of the main body 11 is formed with an attachment / detachment opening 112 used when attaching or detaching the case 24, and a passage opening 113 used when attaching or detaching the first tank 71 and the second tank 72. By forming both the attachment / detachment opening 112 and the passage opening 113 on the first side surface 101, which is the front surface of the main body 11, the operability of the operator can be improved. As will be described in detail later, the first tank 71 and the second tank 72 are engaged with each other. Furthermore, a recess 711 formed on the underside of the first tank 71 is engaged with a protrusion 132 formed on the mounting surface 131 of the first tank accommodating section 13. Therefore, the second tank 72 located below the first tank 71 can be removed by first removing the first tank 71.

[0047] FIG. 4 is a schematic side cross-sectional view showing an example of the configuration of the lever 16. FIG. 5 is a schematic perspective view showing an example of the configuration of the link mechanism 17. FIG. 6 is a schematic perspective view showing a seal member 233 of the heat exchanger 22. The lever 16 is disposed inside the main body 11. The lever 16 is disposed at a position overlapping the attachment / detachment opening 12 in the direction in which the case 24 is attached to the main body 11, i.e., in the front-to-rear direction. The lever 16 is exposed from the attachment / detachment opening 112 by removing the cover 111 of the main body 11. The case 24 is disposed behind the lever 16 with respect to the attachment / detachment opening 112. When the case 24 is housed in the main body 11 and the lever 16 is lowered, the intermediate flow path 41 formed by the frame 15 communicates with the first heat exchange flow path 221 of the heat exchanger 22 housed in the case 24. As a result, exhaust gas that has passed through the first heat exchange flow path 221 flows into the intermediate flow path 41.

[0048] The exhaust air that has passed through the intermediate flow path 41 reaches the exhaust fan 61 by passing between the water supply bodies 26 arranged in parallel above the case 24. The frame 15 includes an outer frame 151 fixed to the main body 11 and an inner frame 152 that is slidable up and down relative to the outer frame 151. The inner frame 152 is connected to the lever 16 by a link mechanism 17, and by moving the lever 16 up and down, the inner frame 152 slides up and down relative to the outer frame 151. That is, by lowering the lever 16, the inner frame 152 moves downward, and the lower end of the inner frame 152 comes into contact with or presses against a seal member 233 formed in a rectangular ring shape along the edge of the top surface of the case 24, ensuring the airtightness of the intermediate flow path 41.

[0049] The link mechanism 17, which moves the inner frame 152 up and down in response to operation of the lever 16, is configured as an integral part of the water supply body 26. That is, the lever 16, link mechanism 17, and water supply body 26 are arranged in a rectangular frame. The link mechanism 17 is formed on two opposing side surfaces of the rectangular frame, i.e., the left and right surfaces. The lever 16 is formed on the side surface connecting the two side surfaces on which the link mechanism 17 is formed, i.e., the front surface. The elongated water supply body 26 is arranged inside the frame 15 so as to bridge between the side surfaces on which the link mechanism 17 is formed. In this embodiment, there are three elongated water supply bodies 26, and each water supply body 26 is arranged in parallel in the short direction of the water supply body 26. The frame body 15, which is composed of the outer frame 151 and the inner frame 152, forms an intermediate flow path 41 through which exhaust gas flowing out from the outlet of the first heat exchange flow path 221 of the heat exchanger 22 flows. By arranging multiple water supply bodies 26 in parallel in the intermediate flow path 41, exhaust gas can be circulated between two adjacent water supply bodies 26, thereby reducing ventilation resistance. Note that the link mechanism 17 is not limited to being configured integrally with the water supply bodies 26; the link mechanism 17 and the water supply bodies 26 may be configured as separate bodies. In this case, by configuring the water supply bodies 26, the link mechanism 17, and the frame body 15 as separate parts that are detachable, the efficiency of maintenance work such as cleaning or replacement of the water supply bodies 26 can be improved by removing them.

[0050] The link mechanism 17 includes a plurality of linear link portions 171 and a plurality of roller portions 172. The linear link portions 171 move horizontally in response to operation of the lever 16, and the roller portions 172 convert the movement of the linear link portions 171 into a vertical direction, thereby moving the inner frame 152 up and down. The linear link portions 171 are configured as S-shaped holes formed in the side surfaces of the rectangular frame and guide the roller portions 172 from below to above. The roller portions 172 are disk-shaped and are guided within the S-shaped holes in the linear link portions 171, thereby moving up and down in response to operation of the lever 16. The roller portions 172 are connected to the inner frame 152, and therefore the inner frame 152 moves up and down in response to movement of the roller portions 172. In this embodiment, the link mechanism 17 including the linear link portions 171 and the roller portions 172 is used to move the inner frame 152 in response to operation of the lever 16, but this is not limited to this. For example, the link mechanism 17 may use various mechanisms such as an elevator gear or a cam mechanism to move the inner frame 152 up and down in response to the operation of the lever 16 .

[0051] As described above, the rectangular tubular sealing member 233 is disposed on the edge of the upper surface of the case 24. The upper surface of the case 24 is where the outlet of the first heat exchange flow path 221 is formed, that is, the rectangular tubular sealing member 233 is disposed so as to surround the outlet of the first heat exchange flow path 221 from the outside.

[0052] FIG. 7 is a schematic side cross-sectional view showing a state in which the intermediate flow path 41 is connected to the first heat exchange flow path 221. FIG. 8 is a schematic side cross-sectional view showing a state in which the intermediate flow path 41 is separated from the first heat exchange flow path 221. As described above, the link mechanism 17 moves the inner frame 152 up and down relative to the outer frame 151 in conjunction with the up and down operation of the lever 16. That is, the frame body 15 has a double structure consisting of the inner frame 152 and the outer frame 151. When the roller portion 172 of the link mechanism 17 moves downward by operating the lever 16, the inner frame 152 connected to the roller portion 172 also moves downward. As a result, the lower end of the inner frame 152 comes into contact with or presses against the seal member 233, ensuring airtightness between the inner frame 152 and the seal member 233, i.e., airtightness between the first heat exchange flow path 221 and the intermediate flow path 41. In other words, the intermediate flow path 41 formed by the frame body 15 connects the first heat exchange flow path 221 of the heat exchanger 22 and the exhaust flow path 4 in which the exhaust fan 61 is arranged in a state where airtightness is guaranteed, and the intermediate flow path 41 is in a connected state.

[0053] When the roller portion 172 of the link mechanism 17 moves upward by operating the lever 16, the inner frame 152 connected to the roller portion 172 also moves upward. As a result, the lower end of the inner frame 152 moves away from the seal member 233, and the inner frame 152 and the seal member 233 are not in contact with each other. In other words, the intermediate flow path 41 formed by the frame body 15 moves away from the first heat exchange flow path 221 and enters a separated state. In this way, the lever 16 switches between the connected state and the separated state.

[0054] By operating the lever 16 to place the intermediate flow path 41 in a separated state, it is possible to prevent the lower end of the inner frame 152 from rubbing against the seal member 233 of the case 24 when the case 24 is pulled out from the attachment / detachment opening 112 of the main body 11, thereby suppressing wear of the seal member 233. In this embodiment, the inner frame 152 moves relative to the outer frame 151 fixed to the main body 11, but this is not limited thereto, and the inner frame 152 may be fixed and the outer frame 151 may move up and down. In this case, the outer frame 151 comes into contact with or presses against the seal member 233.

[0055] FIG. 9 is a schematic cross-sectional side view showing the positional relationship between the lever 16 and the cover 111 when the heat exchanger 22 is attached. FIG. 10 is a schematic cross-sectional side view showing the positional relationship between the lever 16 and the cover 111 when the heat exchanger 22 is removed. When the case 24 is not installed in the main body 11, i.e., when the heat exchanger 22 is removed, the tip of the lever 16 is positioned so that it will interfere with the cover 111 when it is attached to the main body 11. One or more ribs or protrusions are formed on the inside of the cover 111. When the lever 16 is moved downward with the heat exchanger 22 removed, the lever 16 and the ribs or the like of the cover 111 interfere with each other, preventing the cover 111 from being properly attached to the main body 11. In this case, a gap corresponding to the protruding height of the ribs or the like of the cover 111 may be formed between the cover 111 and the main body 11.

[0056] When the case 24 is installed inside the main body 11, i.e., when the heat exchanger 22 is attached, the lever 16 is configured to stop at a position where it does not interfere with the ribs of the cover 111 when it is moved downward. This allows the cover 111 to be properly attached to the main body 11. This effectively prevents the cover 111 from being attached to the main body 11 without the case 24 being installed inside the main body 11.

[0057] Furthermore, in the separated state, for example, the tip of the lever 16 may be positioned so as to interfere with the cover 111 when the cover 111 is attached to the main body 11. In the separated state, the intermediate flow path 41 in the main body 11 and the first heat exchange flow path 221 of the heat exchanger 22 are not connected, and an airtight state is not guaranteed. In contrast, in the separated state in which the lever 16 is moved upward, interference between the lever 16 and a rib or the like of the cover 111 can effectively prevent the cover 111 from being attached to the main body 11 in the separated state.

[0058] FIG. 11 is a schematic perspective view showing the exhaust flow path 4 including a branch portion. FIG. 12 is a schematic perspective cross-sectional view showing the power supply board 12 arranged in the exhaust flow path 4. FIG. 13 is a schematic side cross-sectional view showing the appearance of a through hole 423 formed in the exhaust flow path 4. The exhaust air that passes through the exhaust flow path 4 in which the intermediate flow path 41 and the water supply body 26 are arranged reaches the exhaust fan 61. In the exhaust flow direction, the exhaust flow path 4 downstream of the first heat exchange flow path 221 corresponds to the downstream exhaust flow path 42. In other words, the downstream exhaust flow path 42 constitutes a part of the exhaust flow path 4. The downstream exhaust flow path 42 connects the first heat exchange flow path 221 and the exhaust outlet 43 via the intermediate flow path 41. The downstream exhaust flow path 42 is located above the frame 15. More specifically, in the exhaust flow direction, the downstream exhaust flow path 42 is located downstream of the intermediate flow path 41 and upstream of the exhaust outlet 43.

[0059] The downstream exhaust flow path 42 is branched into a first downstream exhaust flow path 421 and a second downstream exhaust flow path 422. That is, the downstream exhaust flow path 42 includes a branch portion between the first downstream exhaust flow path 421 and the second downstream exhaust flow path 422. The first downstream exhaust flow path 421 is connected to an exhaust outlet 43 formed on the upper surface 100 of the main body 11. The second downstream exhaust flow path 422 is connected to a branch exhaust outlet 427 formed in a gap or the like on one of the side surfaces, such as the second side surface 102, of the main body 11. The volumetric flow rate of the second downstream exhaust flow path 422 connected to the branch exhaust outlet 427 is smaller than the volumetric flow rate of the first downstream exhaust flow path 421 connected to the exhaust outlet 43. Specifically, the volumetric flow rate of the second downstream exhaust flow path 422 is set to, for example, 1 / 5 or less and 1 / 50 or more of the volumetric flow rate of the first downstream exhaust flow path 421. That is, the first downstream exhaust flow path 421 may be a main flow path, and the second downstream exhaust flow path 422 may correspond to a branch flow path.

[0060] The second downstream exhaust flow path 422 includes an inlet-side flow path 4221 that communicates with the branching portion, and an outlet-side flow path 4222 that is located downstream of the inlet-side flow path 4221. The second downstream exhaust flow path 422 is curved and includes a plurality of bends 424. That is, the second downstream exhaust flow path 422 has a labyrinth structure that includes a plurality of bends 424 in the flow path from the branching portion to the location where the power supply substrate 12 is disposed.

[0061] The bent portion 424 includes an inlet-side connecting portion 425 formed in the inlet-side flow path 4221, and an outlet-side connecting portion 426 formed between the inlet-side flow path 4221 and the outlet-side flow path 4222. The bent portion 424 is formed by aligning the inlet-side flow path 4221 with two adjacent surfaces of the main body 11. The inlet-side connecting portion 425 is formed at a location connecting the inlet-side flow path 4221 along the top surface 100 with the inlet-side flow path 4221 along the first side surface 101, which is the front surface. The outlet-side connecting portion 426 is formed at a location connecting the inlet-side flow path 4221 along the first side surface 101 with the outlet-side flow path 4222 along the second side surface 102, which is the right surface.

[0062] The power supply substrate 12 is disposed in the outlet-side flow path 4222 downstream of the outlet-side connecting portion 426. The power supply substrate 12 has a rectangular plate shape and is disposed with its longitudinal direction aligned with the flow path direction of the outlet-side flow path 4222. Electronic components 121 are mounted on the surface of the power supply substrate 12. The electronic components 121 protrude from the surface of the power supply substrate 12 toward the inside of the outlet-side flow path 4222. In other words, the electronic components 121 are disposed between the surface of the power supply substrate 12 and the second side surface 102. A branch exhaust outlet 427 is formed in the outlet-side flow path 4222 downstream of the power supply substrate 12. Therefore, the exhaust air flowing through the outlet-side flow path 4222 can directly hit the surface of the power supply substrate 12, allowing the power supply substrate 12 and the electronic components 121 to be efficiently cooled by the exhaust air.

[0063] The power supply board 12 supplies power to the fan motor 6. When the fan motor 6 is configured as a DC motor driven by DC power, the power supply board 12 functions as an AC / DC board that converts AC power to DC power. In this case, even if the AC / DC board generates a relatively large amount of heat, the power supply board 12 can be efficiently cooled using the cold energy of the exhaust gas cooled by the latent heat of vaporization. The exhaust gas that passes through the area where the power supply board 12 is located is discharged to the outside of the main body 11 through the branch exhaust outlet 427.

[0064] A through hole 423 is formed in the second downstream exhaust flow path 422. The through hole 423 may be formed at the lowest portion of the inner wall forming the second downstream exhaust flow path 422. In this embodiment, the through hole 423 is formed in the bottom of the outlet-side connecting portion 426. By forming the through hole 423 in the bottom of the outlet-side connecting portion 426, which is part of the bent portion 424, atomized liquid water contained in the exhaust gas is separated into gas and liquid by centrifugal force as the exhaust gas passes through the outlet-side connecting portion 426, and the separated liquid water can be drained from the through hole 423 to the outside of the second downstream exhaust flow path 422. By separating the liquid water from the exhaust gas in this manner, the moisture contained in the exhaust gas that hits the power supply board 12 can be reduced. A drain pan 91 may be disposed directly below the through hole 423. In this case, the drain pan 91 can collect water dripping from the through hole 423 of the second downstream exhaust flow path 422.

[0065] Fig. 14 is a schematic perspective view showing a water-absorbing member 242 and a dripping member 243 arranged at both ends below the heat exchanger 22. Fig. 15 is a schematic side cross-sectional view showing the arrangement of the water-absorbing member 242 and the dripping member 243. Fig. 16 is a schematic perspective view showing the arrangement of the water-absorbing member 242. The water-absorbing member 242 is arranged below the heat exchanger 22, i.e., below the inlet of the first heat exchange flow path 221 of the heat exchanger 22. A dripping member 243 having a protruding end 244 is arranged below the water-absorbing member 242.

[0066] The water absorbing member 242 and the dripping member 243 may be configured as an integral part of the case 24 that houses the heat exchanger 22. That is, the case 24 includes the water absorbing member 242 and the dripping member 243. The case 24 has a rectangular frame on the bottom that covers the inlet of the first heat exchange flow path 221 of the heat exchanger 22, and the water absorbing member 242 and the dripping member 243 may be disposed on opposing frames of the rectangular frame that configures the case 24.

[0067] The water-absorbing member 242 is formed of a soft material with high water absorption, such as a sponge or a foam material such as urethane foam, and has an elongated shape. The water-absorbing member 242 is formed of a material that is softer than the plate member 232 that forms the exhaust path 231 of the first heat exchange flow path 221. The dripping member 243 is also elongated like the water-absorbing member 242, and the longitudinal length of the dripping member 243 is formed to be approximately the same as the longitudinal length of the water-absorbing member 242. The dripping member 243 has a protruding end 244, such as a rib that is triangular in cross section.

[0068] The tip of the protruding end 244 faces downward. As a result, from top to bottom, the inlet of the first heat exchange flow path 221 of the heat exchanger 22, the water absorbing member 242, and the dripping member 243 with the protruding end 244 facing downward are arranged in this order. The inlet of the first heat exchange flow path 221 of the heat exchanger 22 is the point from which water dripping from the water supply body 26 flows out. Therefore, water dripping from the water supply body 26 and flowing down the first heat exchange flow path 221 of the heat exchanger 22 is absorbed by the water absorbing member 242 and then drips from the protruding end 244 of the dripping member 243 located below the water absorbing member 242. Because a drain pan 91 is arranged below the heat exchanger 22, the water dripping from the protruding end 244 of the dripping member 243 is collected in the drain pan 91.

[0069] Because the cross-sectional area of ​​the exhaust path 231 that constitutes the first heat exchange flow path 221 of the heat exchanger 22 is relatively small, there is a concern that a meniscus, in which water accumulates, may occur in the exhaust path 231. However, by arranging the water absorbing member 242 and the dripping member 243 below the first heat exchange flow path 221, it is possible to suppress the occurrence of a meniscus or to destroy any meniscus that does occur. This makes it possible to suppress an increase in the ventilation resistance of the first heat exchange flow path 221 due to the exhaust path 231 being blocked by water, and ensures the heat exchange performance of the heat exchanger 22.

[0070] The elongated water absorbing member 242 and dripping member 243 are arranged along the stacking direction of the exhaust paths 231. This allows the water absorbing member 242 and dripping member 243 to be positioned for all of the stacked exhaust paths 231. In FIG. 14 , two elongated water absorbing members 242 and dripping members 243 are arranged parallel to each other in the short direction. Furthermore, the water absorbing member 242 and dripping member 243 are arranged at both ends in the longitudinal direction of the exhaust path 231, which has a rectangular flow path cross section. By arranging the water absorbing member 242 and dripping member 243 at both ends in the longitudinal direction of the exhaust path 231 in this manner, an increase in ventilation resistance in the exhaust path 231 can be suppressed.

[0071] The heat exchanger 22 is composed of a first heat exchange flow path 221 and a second heat exchange flow path 222 that are orthogonal to each other. The first heat exchange flow path 221 includes multiple exhaust paths 231, and the second heat exchange flow path 222 includes multiple supply paths. The first heat exchange flow path 221 and the second heat exchange flow path 222 are composed of multiple plate members 232 and spacers that are alternately stacked. The plate member 232 may be composed of a film member with a nonwoven fabric attached to its surface. Adjacent spacers in the stacking direction are arranged with their longitudinal directions rotated 90 degrees relative to each other. Adjacent spacers across the same plate member 232 intersect each other. As a result, the first heat exchange flow path 221 and the second heat exchange flow path 222 are orthogonal to each other, and a cross flow is formed between the supply air flowing through the second heat exchange flow path 222 and the exhaust air flowing through the first heat exchange flow path 221.

[0072] The water-absorbing member 242, located below the heat exchanger 22, i.e., below the exhaust gas inlet of the first heat exchange flow path 221, is pressed by the lower end of the plate member 232. The water-absorbing member 242 is molded from a softer material than the plate member 232, such as sponge, e.g., a resin. Therefore, when pressed by the lower end of the plate member 232, a portion of the upper portion of the water-absorbing member 242 penetrates into the first heat exchange flow path 221, i.e., into each of the stacked exhaust paths 231. This increases the contact area of ​​the water-absorbing member 242 with water flowing down the first heat exchange flow path 221. As a result, the water-absorbing ability of the water-absorbing member 242 is improved, and the formation of a meniscus can be efficiently suppressed. A dripping member 243 is disposed below the water-absorbing member 242, and a protruding end 244 of the dripping member 243 protrudes downward. This allows the water absorbed by the water absorbing member 242 to drip efficiently from the tip of the protruding end 244 of the dripping member 243.

[0073] In the present embodiment, as shown in FIG. 14 , two water-absorbing members 242 and two dripping members 243 are disposed, but this is not limiting. FIG. 17 is a schematic perspective view showing a modified arrangement of the water-absorbing members 242 and the dripping members 243. As shown in FIG. 17 , one water-absorbing member 242 and one dripping member 243 may be disposed in the center below the heat exchanger 22. That is, the water-absorbing member 242 and the dripping member 243 may be disposed in the center in the longitudinal direction of the exhaust path 231, which has a rectangular cross section. In this case, the water-absorbing member 242 and the dripping member 243 may be configured integrally with the case 24. By disposing the water-absorbing member 242 and the dripping member 243 only in the center below the heat exchanger 22 in this manner, an increase in ventilation resistance of the first heat exchange flow path 221 can be suppressed.

[0074] Fig. 18 is a schematic side cross-sectional view showing a state in which the first tank 71 and the second tank 72 are engaged with the main body 11. Fig. 19 is a schematic side cross-sectional view showing a state in which the first tank 71 is not engaged with the main body 11. The main body 11 includes a first tank housing portion 13 in which the first tank 71 is housed, and a second tank housing portion 14 in which the second tank 72 is housed. The first tank housing portion 13 is formed above the second tank housing portion 14. Therefore, when the first tank 71 and the second tank 72 are housed, the first tank 71 is located above the second tank 72.

[0075] The first tank 71 has a rectangular box shape, and has a water supply tube 712 and a recess 711 formed on its underside. When the first tank 71 is housed in the first tank housing 13, the water supply tube 712 is positioned closer to the attachment / detachment opening 112 formed in the main body 11 than the recess 711. In other words, when the attachment / detachment opening 112 is used as the reference, the water supply tube 712 is positioned closer to the recess 711. The protruding length of the water supply tube 712 from the underside of the first tank 71, i.e., its vertical length, is greater than the depth of the recess 711 from the underside of the first tank 71.

[0076] When first tank 71 and second tank 72 are housed, water supply tube 712 is inserted into second tank 72. Water supply tube 712 is configured, for example, as a chicken feed type, and when the water level in second tank 72 falls below the tip of water supply tube 712, air flows in and the water equivalent to the amount of air that has flowed in is supplied from first tank 71 to second tank 72.

[0077] The first tank housing portion 13 forms a space surrounded by the inner surfaces of various structural components arranged in the main body 11. The first tank housing portion 13 has a mounting surface 131 on which the first tank 71 is placed, and inner surfaces on the upper and each side. The mounting surface 131 is formed with a convex portion 132 corresponding to a concave portion 711 formed on the underside of the first tank 71. That is, when the first tank 71 is placed on the mounting surface 131 and housed in the first tank housing portion 13, the concave portion 711 of the first tank 71 and the convex portion 132 of the mounting surface 131 fit together. The concave portion 711 and the convex portion 132 may be formed in a triangular or trapezoidal shape in cross section.

[0078] The convex portion 132 formed on the mounting surface 131 is tapered at a predetermined angle relative to the mounting surface 131. The predetermined angle, i.e., the taper angle of the inclined surface relative to the mounting surface 131, is between 5° and 40°, such as 30°, for example. The vertical distance between the mounting surface 131 and the inclined surface increases with increasing distance from the attachment / detachment opening 112. That is, the convex portion 132 of the mounting surface 131 is formed so that the surface-to-surface distance from the mounting surface 131 increases along the depth direction of the first tank accommodating portion 13 when the first tank 71 is inserted into the first tank accommodating portion 13. By providing the convex portion 132 of the mounting surface 131 with a tapered angle in this manner, the first tank 71 can slide over the convex portion 132 of the mounting surface 131 when inserted into the first tank accommodating portion 13, making it easy to accommodate the first tank 71 in the first tank accommodating portion 13.

[0079] When the first tank 71 and the second tank 72 are accommodated, the first tank 71 is disposed above the second tank 72, and in this state, the first tank 71 is placed on both the mounting surface 131 of the first tank accommodation section 13 and the lid 722, which is the upper surface of the second tank 72. Therefore, the mounting surface 131 of the first tank accommodation section 13 and the upper surface of the second tank 72 are located on the same plane.

[0080] The protrusion length of the water supply tubular portion 712 from the underside of the first tank 71 is greater than the protrusion length of the convex portion 132 from the mounting surface 131. That is, when the first tank 71 is housed in the first tank housing portion 13, the vertical length of the water supply tubular portion 712 is greater than the vertical length of the highest part of the convex portion 132. Therefore, when the first tank 71 is removed from the first tank housing portion 13, the first tank 71 moves upward by the vertical length of the water supply tubular portion 712. This releases the engagement between the convex portion 132 and the concave portion 711, thereby disengaging the first tank 71 from the main body 11. As a result, when removing the first tank 71 from the first tank housing portion 13, the operator of the air conditioner 1 can remove or attach the first tank 71 from the main body 11 without being aware of the engagement between the convex portion 132 and the concave portion 711.

[0081] When the first tank 71 is housed in the first tank housing portion 13, the top surface of the first tank 71 is spaced apart from the upper inner surface that forms the first tank housing portion 13, and this distance is greater than the vertical length of the tubular water supply portion 712. Therefore, when the first tank 71 is moved upward to remove it from the first tank housing portion 13, the top surface of the first tank 71 is prevented from interfering with the upper inner surface that forms the first tank housing portion 13, and the first tank 71 can be efficiently removed from the main body 11.

[0082] FIG. 20 is a schematic perspective view showing the second tank 72 and the lid 722. The second tank 72 includes a box body 721 with an opening formed at the top and a lid 722 that covers the opening. The lid 722 is detachably connected to the box body 721. The second tank 72 has a connection portion 724 that connects the box body 721 and the lid 722. The connection portion 724 includes a hinge 725 and a snap fit 726. The hinge 725 and the snap fit 726 are formed on opposite side surfaces of the box body 721. By forming the hinge 725 on one side surface and the snap fit 726 on the other side surface of the two opposite side surfaces in this manner, it is possible to prevent erroneous operation, such as attaching the lid 722 to the box body 721 in the wrong direction.

[0083] The lid 722 is formed with a tube hole 723 through which the water supply tube 712 of the first tank 71 is inserted. The tube hole 723 is circular, and the inner diameter of the tube hole 723 is larger than the outer diameter of the water supply tube 712. In this embodiment, two first tanks 71 are installed inside the main body 11, and therefore two tube holes 723 corresponding to these two first tanks 71 are formed in the lid 722 of the second tank 72. The lid 722 of the second tank 72 may further be formed with a hole through which the recovery water channel 9 extending from the drain pan 91 is inserted. In this case, the hole through which the recovery water channel 9 is inserted may be formed between the two tube holes 723.

[0084] A water level float 733 is disposed inside the second tank 72 to measure the water level of the water stored in the second tank 72. A cylindrical protrusion is formed on the bottom surface of the box body 721 that constitutes the second tank 72, and is inserted into the water supply tube 712 of the first tank 71. The cylindrical protrusion is disposed directly below the tube hole 723 formed in the lid 722.

[0085] A recessed portion may be formed on the side surface of the box body 721 of the second tank 72, which is used when the second tank 72 is pulled out of the second tank housing portion 14. When the second tank 72 is housed in the second tank housing portion 14, the recessed portion is exposed from the passage opening 113 and is positioned in a position visible from outside the main body 11. As described above, when the first tank 71 is housed in the first tank housing portion 13, the recessed portion 711 formed on the bottom surface of the first tank 71 and the protruding portion 132 formed on the mounting surface 131 of the first tank housing portion 13 are engaged with each other, and therefore, horizontal movement of the first tank 71 is restricted by the protruding portion 132.

[0086] Furthermore, the water supply tube 712 of the first tank 71 is inserted into a tube hole 723 formed in a lid 722 that forms the top surface of the second tank 72, and is positioned inside the second tank 72. This engages the first tank 71 and the second tank 72. Therefore, horizontal movement of the second tank 72 is restricted by the water supply tube 712. This prevents the second tank 72 from being erroneously pulled out of the second tank housing portion 14 while the first tank 71 is housed in the first tank housing portion 13. This also prevents the first tank 71, which is located above the second tank 72, from falling or being damaged due to such an erroneous operation.

[0087] 21 is a schematic side cross-sectional view of the second tank 72 when it is installed inside. When the first tank 71 and the second tank 72 are stored, the water supply tube 712 of the first tank 71 is inserted into the second tank 72 through a tube hole 723 formed in the lid 722 of the second tank 72. A water level float 733 is disposed inside the second tank 72. A magnetic sensor 734 that detects the position of the water level float 733 is disposed outside the second tank 72. An in-line filter 732 is disposed inside the second tank 72, and water that passes through the in-line filter 732 flows into the supply water channel 8 connected to the second tank 72. By disposing the in-line filter 732, even if dust or other particles get mixed in the water stored in the second tank 72, the dust can be captured by the in-line filter 732.

[0088] The second tank 72 has a second-tank-side shut-off valve 73. The second-tank-side shut-off valve 73 is located downstream of the in-line filter 732 in the flow direction of water flowing through the supply water passage 8. A main-body-side shut-off valve 81 disposed in the main body 11 is connected to the second-tank-side shut-off valve 73. When the second-tank-side shut-off valve 73 and the main-body-side shut-off valve 81 are connected, i.e., in a coupled state, the second-tank-side shut-off valve 73 and the main-body-side shut-off valve 81 are open, and water from the second tank 72 passes through the second-tank-side shut-off valve 73 and the main-body-side shut-off valve 81, which are in an open state.

[0089] Water that has passed through second tank-side shut-off valve 73 and main body-side shut-off valve 81 is pumped up by pump 82 and supplied to water supply body 26. Water supply body 26 functions as water supply section 211 for the evaporative filter of cooling unit 2 and as a water supply section for the sensible heat exchanger. When second tank-side shut-off valve 73 and main body-side shut-off valve 81 are separated from each other, second tank-side shut-off valve 73 and main body-side shut-off valve 81 are closed, and the water stored in second tank 72 is blocked by second tank-side shut-off valve 73.

[0090] FIG. 22 is a schematic side cross-sectional view showing the main body-side shut-off valve 81 and the second tank-side shut-off valve 73. FIG. 23 is an explanatory diagram showing state transitions of the main body-side shut-off valve 81 and the second tank-side shut-off valve 73. The second tank-side shut-off valve 73 disposed in the second tank 72 includes a tank-side pin 731. A portion of the tank-side pin 731 is inserted into the interior of a box 721 that constitutes the second tank 72. The portion of the tank-side pin 731 that is inserted into the interior of the box 721 that constitutes the second tank 72 is engaged with the outlet of an in-line filter 732 disposed inside the second tank 72. This allows water that has passed through the in-line filter 732 to flow into the second tank-side shut-off valve 73, preventing water containing dust and other particles from flowing into the second tank-side shut-off valve 73.

[0091] The main body-side shut-off valve 81 disposed in the main body 11 includes a main body-side pin 811. When the main body-side pin 811 and the tank-side pin 731 come into contact with each other, the second tank-side shut-off valve 73 and the main body-side shut-off valve 81 are opened. The main body-side pin 811 and the tank-side pin 731 are both cylindrical and include a pin portion tapered at the tip and a disk-shaped contact surface portion located on the opposite side of the pin portion in the longitudinal direction.

[0092] Before the second tank 72 is accommodated in the second tank accommodation section 14, the second tank-side shut-off valve 73 and the main body-side shut-off valve 81 are spaced apart, and the main body-side pin 811 and the tank-side pin 731 are also not in contact with each other. At this time, the main body-side pin 811 and the tank-side pin 731 are pressed against the inner walls by coil springs or the like contained within the second tank-side shut-off valve 73 and the main body-side shut-off valve 81, respectively. As a result, the second tank-side shut-off valve 73 and the main body-side shut-off valve 81 are closed.

[0093] When the second tank 72 is accommodated in the second tank accommodation portion 14, the second tank-side shut-off valve 73 is inserted into the main body-side shut-off valve 81. When the second tank-side shut-off valve 73 is further inserted, for example, about 4 mm, into the main body-side shut-off valve 81 from the inserted point, the contact surface of the main body-side pin 811 comes into surface contact with the contact surface of the tank-side pin 731. As a result, the main body-side pin 811 and the tank-side pin 731 come into contact with each other.

[0094] After the main body pin 811 and the tank pin 731 come into contact, inserting the main body pin 811 further, for example, about 5 mm, moves the main body pin 811, and the main body shut-off valve 81 opens. After the main body shut-off valve 81 opens, inserting the tank pin 731 further, for example, about 10 mm, moves the tank pin 731, and the second tank shut-off valve 73 opens. By inserting the second tank-side shut-off valve 73 about 10 mm in this way to open the second tank-side shut-off valve 73, the off distance required to use the magnetic sensor 734 can be ensured. The off distance is, for example, 8.5 mm, which is shorter than the 10 mm insertion distance required to open the second tank-side shut-off valve 73.

[0095] Figure 24 is a schematic perspective view showing the water supply body 26 located above the heat exchanger 22. Figure 25 is a schematic side cross-sectional view showing the water supply body 26. The water supply body 26 is arranged above the heat exchanger 22, i.e., above the exhaust outlet of the first heat exchange flow path 221. The water supply body 26 is connected to the second tank 72 via the supply water passage 8. More specifically, a water supply end 25, which is the end of the supply water passage 8, is connected to the water supply body 26. As a result, water pumped up by a pump 82 arranged in the supply water passage 8 flows from the water supply end 25 into the water supply body 26.

[0096] The water supply body 26 is configured as a long cylinder or U-shaped groove, and has multiple water supply holes 261 with the same inner diameter formed at equal intervals along the longitudinal direction. Water dripping from the water supply holes 261 is supplied to the first heat exchange flow path 221 of the heat exchanger 22. Therefore, the water supply holes 261 of the water supply body 26 function as nozzles. In this embodiment, there are three water supply bodies 26, and these water supply bodies 26 are arranged side by side so that they are parallel to the short side direction.

[0097] The water supply end 25 is connected to the elongated water supply body 26 at a position closer to one end of the water supply body 26 than to the center in the longitudinal direction. In other words, when the connection point between the water supply end 25 and the water supply body 26 is used as a reference, the distance from the connection point to one end of the water supply body 26 in the longitudinal direction is different from the distance to the other end located opposite the one end. In other words, the distance from the connection point between the water supply end 25 and the water supply body 26 to one end of the water supply body 26 is shorter than the distance from the connection point between the water supply end 25 and the water supply body 26 to the other end of the water supply body 26. The water supply holes 261 are formed at equal intervals along the longitudinal direction of the elongated water supply body 26, so the number of water supply holes 261 formed between the connection point and one end is fewer than the number of water supply holes 261 formed between the connection point and one end. For example, the number of water supply holes 261 formed between the connection point and one end may be less than half, less than one-third, or less than one-quarter of the number of water supply holes 261 formed between the connection point and the other end.

[0098] A flow restriction portion 262 is formed inside the water supply body 26, i.e., in the water conduit through which water supplied from the water supply end 25 flows, to restrict the flow rate of water supplied from the water supply end 25. The flow restriction portion 262 may be, for example, a plate portion formed of a rib or a plate-shaped protrusion. The flow restriction portion 262 may be formed by protruding upward from the bottom surface of the water conduit formed inside the water supply body 26. By forming the plate-shaped flow restriction portion 262, i.e., a plate portion, in the water conduit formed inside the water supply body 26, the flow path cross-sectional area of ​​the water supply body 26 at the location where the flow restriction portion 262 is formed can be made smaller than the flow path cross-sectional area of ​​the water supply body 26 at the location where the flow restriction portion 262 is not formed. In other words, the flow restriction portion 262 functions as a weir that restricts the flow rate of water flowing inside the water supply body 26.

[0099] The flow restriction section 262 may have one or more through holes formed therein that communicate with the water channels on the left and right sides of the flow restriction section 262. In this case, the sum of the areas of the formed through holes corresponds to the flow path cross-sectional area of ​​the water supply body 26 at the location where the flow restriction section 262 is formed.

[0100] If the distance from the connection point between water supply end 25 and water supply body 26 to one end of water supply body 26 is shorter than the distance from the connection point between water supply end 25 and water supply body 26 to the other end of water supply body 26, flow rate restricting section 262 is formed between the connection point and one end. Flow rate restricting section 262 is formed between two adjacent water supply holes 261. Therefore, based on the location where flow rate restricting section 262 is formed, the number of water supply holes 261 formed between flow rate restricting section 262 and one end is less than the number of water supply holes 261 formed between flow rate restricting section 262 and the other end.

[0101] The connection points are arranged so that the ratio between the number of water supply holes 261 formed between the flow rate restricting section 262 and one end and the number of water supply holes 261 formed between the flow rate restricting section 262 and the other end is approximately equal to the ratio between the number of water supply holes 261 formed between the connection point of the water supply end 25 and the water supply body 26 and one end and the number of water supply holes 261 formed between the connection point of the water supply end 25 and the water supply body 26 and the other end. In this embodiment, the flow rate restricting section 262 is formed between the connection point of the water supply end 25 and the water supply body 26 and the water supply hole 261 adjacent to the connection point, out of the multiple water supply holes 261 formed between the connection point of the water supply end 25 and the water supply body 26 and the one end.

[0102] Even if the connection point between the water supply end 25 and the water supply body 26 is formed unevenly at one end of the elongated water supply body 26, by forming a flow rate restrictor 262 at the end closest to the connection point, i.e., at one end in this embodiment, it is possible to equalize the amount of water flowing into each water supply hole 261. Each of the multiple water supply holes 261 formed in the elongated water supply body 26 is arranged corresponding to each of the exhaust paths 231 that make up the first heat exchange flow path 221, and the flow rate restrictor 262 equalizes the volumetric flow rate of each water supply hole 261, allowing water to drip efficiently into each exhaust path 231.

[0103] In this embodiment, the lever 16 moves the frame 15 to switch the state so that the intermediate flow path 41 is positioned at a different location relative to the first heat exchange flow path 221. The states that can be switched by operating the lever 16 in this manner include a connected state and a separated state. In the connected state, the intermediate flow path 41 is connected to both the first heat exchange flow path 221 and the exhaust flow path 4. This improves the sealing performance, i.e., airtightness, when connecting the first heat exchange flow path 221 and the exhaust flow path 4. In the separated state, the intermediate flow path 41 is separated from the first heat exchange flow path 221, i.e., the heat exchanger 22, so that the heat exchanger 22 and the intermediate flow path 41 in which the main body 11 is located are not in contact with each other. This prevents contact between the heat exchanger 22 and the frame 15 and wear on parts of the heat exchanger 22 when the heat exchanger 22 is attached to or detached from the main body 11. Therefore, for example, when attaching or detaching the heat exchanger 22 to or from the main body 11, the frame 15 can be moved by operating the lever 16 to prevent the frame 15 from contacting the heat exchanger 22. By keeping the frame 15 and the heat exchanger 22 out of contact in this manner, it is possible to prevent wear or the like of a portion of the heat exchanger 22 due to contact between the heat exchanger 22 and the frame 15 when attaching or detaching the heat exchanger 22 to or from the main body 11, and to suppress a reduction in the service life of the heat exchanger 22. By using the lever 16 configured in this manner, the intermediate flow path 41 can be switched between a connected state and a separated state, thereby ensuring sealing when connecting the first heat exchange flow path 221 and the exhaust flow path 4 and efficiently attaching or detaching the heat exchanger 22 to or from the main body 11.

[0104] In this embodiment, the frame 15 is disposed above the heat exchanger 22. This allows the downstream exhaust flow path 42 located above the heat exchanger 22 to be connected to the first heat exchange flow path 221 of the heat exchanger 22. Furthermore, even if the heat exchanger 22 is moved horizontally when being attached or detached from the main body 11, the frame 15 can be prevented from interfering with the movement direction, i.e., the attachment / detachment direction. This allows the heat exchanger 22 to be attached or detached efficiently.

[0105] In this embodiment, the first heat exchange flow path 221 is formed in a straight line extending from the bottom to the top of the heat exchanger 22. The lever 16 is operated by an operator of the air conditioner 1 to move the frame 15 vertically relative to the heat exchanger 22. The frame 15 is disposed above the heat exchanger 22, and by moving the frame 15 downward with the lever 16, the intermediate flow path 41 is brought into a connected state. By moving the frame 15 upward with the lever 16, the intermediate flow path 41 is brought into a separated state. In this way, by moving the frame 15 vertically in response to the operation of the lever 16, the intermediate flow path 41 can be switched between a connected state and a separated state relatively easily.

[0106] In this embodiment, the heat exchanger 22 has a seal member 233 arranged on the outer periphery of the open end of the first heat exchange passage 221, and the seal member 233 has a rectangular frame shape. The frame 15 contacts the seal member 233 in the connected state and is separated from the seal member 233 in the separated state. The shape of the contact surface of the frame 15 that contacts the seal member 233 is formed to correspond to and be roughly the same shape as the rectangular frame-shaped seal member 233. As a result, in the connected state, the contact surface of the frame 15 presses the seal member 233 from above and contacts it, thereby ensuring sealing when connecting the first heat exchange passage 221 and the exhaust passage 4.

[0107] In this embodiment, the frame 15 includes an outer frame 151 and an inner frame 152. The outer frame 151 is fixed to the exhaust flow path 4 of the main body 11. The inner frame 152 is configured to be slidable in the up and down direction relative to the outer frame 151. The lever 16 switches between the connected state and the separated state by moving the inner frame 152 relative to the outer frame 151. Therefore, with a relatively simple configuration, the switching can be performed while ensuring sealing in the connected state. That is, the frame 15 may have a double structure consisting of the outer frame 151 and the inner frame 152, with one inner frame 152 movable and the other outer frame 151 fixed. In this case, the frame 15 may be configured such that the inner frame 152 is fixed and the outer frame 151 is movable.

[0108] In this embodiment, in the connected state, the intermediate flow path 41 is constituted by the inner wall surface of the outer frame 151 and the inner wall surface of the inner frame 152 that is disposed inside the outer frame 151 and moves relative to the outer frame 151. In this case, the inner frame 152 is in close contact with the seal member 233 that is disposed on the outer peripheral edge at the open end of the first heat exchange flow path 221, thereby improving the sealing performance when connecting the first heat exchange flow path 221 and the exhaust flow path 4.

[0109] In this embodiment, a link mechanism 17 is disposed on the main body 11, connecting the lever 16 and the frame 15. The link mechanism 17 includes a linear link portion 171 and a roller portion 172. The linear link portion 171 moves horizontally in response to operation of the lever 16. The roller portion 172 converts the movement of the linear link portion 171 into a vertical movement, thereby moving the frame 15 up and down. In this manner, the link mechanism 17 functions as a cam, using the linear link portion 171 and the roller portion 172 to convert the stress applied to the lever 16 into a vertical movement amount of the frame 15. Therefore, the frame 15 can be moved up and down by operating the lever 16 with a relatively small force.

[0110] In this embodiment, the main body 11 includes a cover 111 disposed opposite one side of the heat exchanger 22. The cover 111 is configured to be detachable from the main body 11. The lever 16 is disposed between the cover 111 and one side of the heat exchanger 22, and therefore, when the cover 111 is removed from the main body 11, the lever 16 is exposed from the outside of the main body 11. This makes it easier for an operator to access and operate the lever 16, improving the operability of the lever 16.

[0111] In this embodiment, in the separated state, for example, at least a part of the tip of the lever 16 is positioned in a position that will interfere with the cover 111 when the cover 111 is attached to the main body 11. Therefore, when the lever 16 is positioned in the separated state, the cover 111 cannot be properly attached to the main body 11. In the separated state, the heat exchanger 22 and the frame 15 are separated, that is, the sealing between the first heat exchange passage 221 and the exhaust passage 4 is not ensured. However, the position of the lever 16 in the separated state corresponds to a position that will interfere with the cover 111 attached to the main body 11, so that it is possible to reliably prevent erroneous attachment of the cover 111 to the main body 11 in the separated state.

[0112] In this embodiment, the cover 111 of the main body 11 is removed when the heat exchanger 22 is attached to or detached from the main body 11. The cover 111 has the suction port 3 communicating with the heat exchanger 22 and the dust collection filter 31 covering the suction port 3. In other words, the cover 111 is configured as an integral part of the suction port 3 and the dust collection filter 31. Since the cover 111, which is removed when the heat exchanger 22 is attached to or detached from the main body 11, has the suction port 3 and the dust collection filter 31 in this way, it is possible to reduce the number of parts and thereby reduce product costs, etc.

[0113] In this embodiment, the heat exchanger 22 is housed in a case 24 having a grip portion 241 and is installed inside the main body 11. That is, when attaching or detaching the heat exchanger 22 to or from the main body 11, the case 24 housing the heat exchanger 22 is detached. The case 24 is formed with, for example, a rectangular ring-shaped grip portion 241. An operator of the air conditioner 1 can remove the case 24, i.e., the heat exchanger 22 housed in the case 24, from the main body 11 by grasping the grip portion 241 and pulling it horizontally. The grip portion 241 is located between the lever 16 disposed on the main body 11 and the heat exchanger 22 in the attachment / detachment direction of the heat exchanger 22. In the connected state, at least a portion of the grip portion 241 is covered by the lever 16. Therefore, in the connected state, the lever 16 prevents the operator from accessing the grip portion 241, thereby preventing accidental removal of the case 24 in the connected state. In the separated state, the grip portion 241 is not covered by the lever 16. Therefore, the operator can access the grip portion 241 without being obstructed by the lever 16, and can easily remove the case 24.

[0114] In this embodiment, the main body 11 of the air conditioner 1 includes a box-shaped housing that forms the outer shell of the air conditioner 1, and one side of the main body 11 is formed with an attachment / detachment opening 112 that is used when attaching or detaching the case 24 to or from the main body 11. The cover 111 is arranged to cover the attachment / detachment opening 112. The cover 111 is configured to be detachable from the main body 11, and when the cover 111 is removed, the case 24 is accessible from outside the main body 11 through the attachment / detachment opening 112. In this case, air drawn in from the air inlet 3 flows through the attachment / detachment opening 112. The lever 16 is arranged near the attachment / detachment opening 112. More specifically, the lever 16 is arranged in a position that overlaps with the attachment / detachment opening 112 in the direction in which the case 24 is attached to the main body 11, i.e., in the horizontal direction. Therefore, an operator who attaches or detaches the heat exchanger 22 through the attachment / detachment opening 112 can easily access the lever 16, thereby improving the workability of attaching or detaching the heat exchanger 22.

[0115] In this embodiment, the air conditioner 1 includes a water supply body 26 formed of a long tube that supplies water to the first heat exchange flow path 221. The long water supply body 26 has a plurality of nozzles or water channels formed along its length, and water dripping from the nozzles or the like is supplied into the first heat exchange flow path 221. The water supplied from the water supply body 26 drips from above to below in the first heat exchange flow path 221 of the heat exchanger 22, whereby it vaporizes and cools the air flowing through the first heat exchange flow path 221 by the latent heat of vaporization. Because the water supply body 26 is disposed within an area surrounded by the frame 15, even if water dripping from the water supply body 26 splashes, the splashed water is blocked by the frame 15, and the water is prevented from flowing beyond the frame 15, i.e., water leakage is reliably prevented.

[0116] In this embodiment, a water supply body 26 is disposed above a heat exchanger 22 having a first heat exchange passage 221 through which exhaust air flows and a second heat exchange passage 222 through which supply air flows. The water supplied from the water supply body 26 enters the interior from above the first heat exchange passage 221 and mixes with exhaust air flowing from below the first heat exchange passage 221. A portion of the water is vaporized, thereby cooling the exhaust air with the latent heat of vaporization. A tank 7 for holding water, which is housed within the main body 11 of the air conditioner 1, is connected to the water supply body 26 by a water supply end 25, and water is supplied to the water supply body 26 via the water supply end 25. The water supply body 26 is an elongated cylindrical body or, for example, a U-shaped water guide groove. The water supplied from the water supply end 25 flows through a water guide channel formed within the elongated water supply body 26 along the longitudinal direction of the elongated water supply body 26. A plurality of water supply holes 261 are formed along the longitudinal direction at the bottom of the water supply body 26, i.e., on the bottom surface of the water conduit formed inside the water supply body 26. Water supplied from the water supply end 25 passes through each of the plurality of water supply holes 261 and drips into the first heat exchange passage 221 of the heat exchanger 22 located below, whereby the water is evaporated inside the first heat exchange passage 221. A flow rate restricting section 262 is disposed in the water conduit formed inside the water supply body 26, restricting the flow rate of water supplied from the water supply end 25 to any one of the plurality of water supply holes 261. The flow rate restricting section 262 may be disposed at a position where the amount of water flowing in from the water supply end 25 is large, i.e., at a position where the volumetric flow rate per unit time is equal to or greater than a predetermined value. In this way, by restricting the flow rate at a position in the water supply body 26 where water is likely to flow in from the water supply end 25 using the flow rate restriction section 262, the flow rate in the longitudinal direction of the water supply body 26 tends to be uniform, and water can be sprayed relatively uniformly onto the first heat exchange flow path 221 of the heat exchanger 22.

[0117] In this embodiment, a water conduit through which water flows is formed within the water supply body 26, and the water conduit is configured along the longitudinal direction of the elongated water supply body 26. One or more flow restriction units 262 are disposed in the water conduit, and therefore, a portion of the water conduit is blocked by the flow restriction units 262. That is, the water conduit includes a section where a flow restriction unit 262 is disposed and a section where a flow restriction unit 262 is not disposed, and the flow channel cross-sectional area differs between these sections. In comparing these respective flow channel cross-sectional areas, the flow channel cross-sectional area in the section where a flow restriction unit 262 is disposed is 50% or less and 5% or more of the flow channel cross-sectional area in the section where a flow restriction unit 262 is not disposed. Alternatively, the flow channel cross-sectional area in the section where a flow restriction unit 262 is disposed may be 30% or less and 5% or more of the flow channel cross-sectional area in the section where a flow restriction unit 262 is not disposed. Alternatively, the flow path cross-sectional area at the portion where the flow restriction unit 262 is located may be 20% or less and 5% or more of the flow path cross-sectional area at the portion where the flow restriction unit 262 is not located. The lower limit is not limited to 5% or more and may be, for example, 3% or more or 10% or more. That is, the flow path cross-sectional area at the portion where the flow restriction unit 262 is located is smaller than the flow path cross-sectional area at the portion where the flow restriction unit 262 is not located. The flow restriction unit 262 that restricts the water flow rate in this manner is formed to protrude from the bottom surface of the water conduit formed inside the water supply body 26. If the water conduit is formed in a cylindrical shape, it may function as a weir that allows water to pass only between the upper end surface of the protruding flow restriction unit 262 and the top surface of the water conduit. Alternatively, if the water conduit is formed as a U-shaped gutter, flow rate restricting portion 262 may function as a weir that allows water to pass when the water level in the water conduit exceeds the upper end face of protruding flow rate restricting portion 262 by making the protruding height of flow rate restricting portion 262 lower than the gutter wall of the U-shaped gutter. Alternatively, flow rate restricting portion 262 may close the water conduit formed inside water supply body 26, but may have one or more holes formed in flow rate restricting portion 262, thereby ensuring a flow path cross-sectional area that is the cross-sectional integral of the holes, or, if there are multiple holes, the sum of the cross-sectional areas of these holes.By using a flow rate restricting section 262 of this type, the flow rate of water supplied from the water supply end 25 to the water supply body 26 can be restricted with a relatively simple configuration or shape, and the ease of water flow in the water conduit formed inside the water supply body 26 tends to be uniform.

[0118] In this embodiment, the outlet of water supply end 25, i.e., the connection between water supply end 25 and water supply body 26, is located closer to one end of water supply body 26, i.e., closer to the end in one direction, than to the center in the longitudinal direction of elongated water supply body 26. In addition, flow rate restricting section 262 is located at a position in water supply body 26 corresponding to the outlet of water supply end 25, i.e., the position of the connection between water supply end 25 and water supply body 26, and on the side of one end in the longitudinal direction of water supply body 26. Therefore, in the longitudinal direction of water supply body 26, the distance from flow rate restricting section 262 to one end is shorter than the distance from flow rate restricting section 262 to the other end, i.e., the end in the other direction, i.e., the end located opposite the one end in the longitudinal direction. If water supply body 26 and the outlet of water supply end 25 are not directly connected, but the outlet of water supply end 25 is located above water supply body 26, and water dripping from the outlet is supplied to water supply body 26, the position on water supply body 26 corresponding to the outlet of water supply end 25 may indicate the position of the part of water supply body 26 located vertically below the outlet. Water flowing out from the outlet of water supply end 25 is divided into water flowing toward one end and water flowing toward the other end located in the opposite direction from the one end. In this case, since the outlet of water supply end 25 is positioned toward one end rather than the center in the longitudinal direction of elongated water supply body 26, if flow restrictor 262 were not present, water would flow more easily from the outlet of water supply end 25 to one end than from the outlet of water supply end 25 to the other end, and the amount of water diverted toward one end, i.e., the volumetric flow rate per unit time, would be greater than the amount of water diverted toward the other end, raising concerns that uniformity would not be achieved. In contrast, flow restrictor 262 is located on the side of the position where water supply end 25 is located and the one end, slowing the ease of water flow from the outlet of water supply end 25 to one end, reducing the amount of water diverted toward one end and correspondingly increasing the amount of water diverted toward the other end, thereby tending to uniform the ease of water flow in water supply body 26.

[0119] In this embodiment, when the air conditioner 1 is normally installed, the first heat exchange passage 221 is formed from below to above the heat exchanger 22, and therefore the flow direction of the exhaust gas flowing through the first heat exchange passage 221 is from below to above. In contrast, the water supply body 26 is disposed above the heat exchanger 22, i.e., directly above the outlet of the first heat exchange passage 221, i.e., the exhaust gas outlet. The longitudinal direction of the elongated water supply body 26 and the flow direction of the exhaust gas flowing through the first heat exchange passage 221, i.e., the extension direction of the first heat exchange passage 221, are perpendicular or intersecting. By disposing the water supply body 26 relative to the heat exchanger 22 in this manner, the flow of the exhaust gas is simplified, the exhaust gas passage 4 in which the water supply body 26 is disposed can be simplified, and the air conditioner 1 can be made more compact.

[0120] In this embodiment, the inner diameter of each of the multiple water supply holes 261 formed in the water supply body 26 is the same, and they are arranged at equal intervals along the longitudinal direction of the water supply body 26. By arranging the multiple water supply holes 261 with the same inner diameter and at equal intervals along the longitudinal direction, the amount of water dripping from each of these water supply holes 261 tends to be uniform, and the shape of the water supply body 26 can be relatively simplified, improving the manufacturability of the water supply body 26.

[0121] In this embodiment, at least two water supply bodies 26 are arranged along a direction intersecting the flow direction of the exhaust gas flowing through the first heat exchange passage 221. Therefore, when the first heat exchange passage 221 is composed of a plurality of exhaust paths 231, water can be dripped from at least two locations on each of the exhaust paths 231 to supply water to the exhaust paths 231. Furthermore, at least two or more water supply bodies 26 are arranged side by side so that the longitudinal direction of each of the water supply bodies 26 intersects, for example, perpendicular to the flow direction of the exhaust gas flowing through the first heat exchange passage 221, and is parallel to the lateral direction. In this case, the exhaust gas that has passed through the first heat exchange passage 221 is arranged in parallel and flows between two adjacent water supply bodies 26. Even if the air conditioner 1 has multiple water supplies 26 in this way, by arranging these water supplies 26 in parallel along a direction that intersects the flow direction of the exhaust gas flowing through the first heat exchange passage 221, the flow of the exhaust gas is simplified, the exhaust passage 4 in which the water supplies 26 are arranged can be simplified, and the air conditioner 1 can be made smaller.

[0122] In this embodiment, the first heat exchange flow path 221 includes a plurality of stacked plate members 232, and is configured with an exhaust path 231 formed in the gap between two adjacent plate members 232. That is, the first heat exchange flow path 221 has a plurality of stacked exhaust paths 231. Because the longitudinal direction of the water supply body 26 and the stacking direction of the plurality of plate members 232, i.e., the stacking direction of the plurality of exhaust paths 231, are parallel, water can be supplied by dripping from each of the water supply holes 261 formed along the longitudinal direction of the water supply body 26 to each of the plurality of exhaust paths 231.

[0123] In this embodiment, the multiple water supply holes 261 formed along the longitudinal direction of the water supply body 26 are arranged at equal intervals. The multiple plate members 232 stacked to form the first heat exchange flow path 221 are stacked with a predetermined gap between adjacent plate members 232 so that the distance between each adjacent plate member 232 is equal. The gap is formed by a spacer disposed between the two plate members 232, forming the exhaust path 231. The distance between adjacent two water supply holes 261, i.e., the distance between the centers of the two water supply holes 261, the distance between adjacent two plate members 232, and the distance between adjacent two exhaust paths 231, are equal and correspond to each other. Therefore, water can be dripped from each water supply hole 261 formed along the longitudinal direction of the water supply body 26 to each exhaust path 231 corresponding to the water supply hole 261.

[0124] In this aspect, the multiple water supply holes 261 include some water supply holes 261 whose water flow rate is restricted by the flow rate restricting section 262, and other water supply holes 261 whose water flow rate is not restricted by the flow rate restricting section 262. In this case, the volumetric flow rate per unit time of water flowing toward the water supply hole 261 whose water flow rate is restricted is smaller than the volumetric flow rate per unit time of water flowing toward the other water supply holes 261 whose water flow rate is not restricted. Even in this case, because the number of water supply holes 261 whose water flow rate is restricted is smaller than the number of other water supply holes 261 whose water flow rate is not restricted, the volumetric flow rate per unit time of water passing through each of the multiple water supply holes 261 can tend to be uniform depending on the water flow rate restricted by the flow rate restricting section 262.

[0125] In this embodiment, the flow rate restricting portion 262 is configured as a rib-shaped plate portion formed on a water channel formed inside the water supply body 26. Therefore, the flow rate restricting portion 262 can be configured with a relatively simple shape or structure.

[0126] In this aspect, the air conditioner 1 includes a heat exchanger 22, which is installed inside a main body 11 that constitutes the housing or the like of the air conditioner 1. The heat exchanger 22 has a first heat exchange passage 221 through which exhaust air flows and a second heat exchange passage 222 through which supply air flows, and functions as a sensible heat exchanger that exchanges sensible heat between the exhaust air flowing through the first heat exchange passage 221 and the supply air flowing through the second heat exchange passage 222. The first heat exchange passage 221 and the second heat exchange passage 222 each have multiple passages, and these passages may intersect to form a cross flow between the first heat exchange passage 221 and the second heat exchange passage 222. The main body 11 of the air conditioner 1 includes an exhaust passage 4 through which exhaust air flows, and the exhaust passage 4 and the first heat exchange passage 221 are connected. In other words, the exhaust passage 4 of the air conditioner 1 as a whole includes the first heat exchange passage 221 of the heat exchanger 22. An exhaust fan 61 is disposed in the downstream exhaust flow path 42, which is the exhaust flow path 4 downstream of the first heat exchange flow path 221 in the exhaust flow direction, and the exhaust fan 61 is powered by a power supply substrate 12 provided in the main body 11. The exhaust flow path 4 includes the downstream exhaust flow path 42, that is, the downstream exhaust flow path 42 constitutes a part of the exhaust flow path 4. The power supply substrate 12, which is a heat generating element, is disposed in the downstream exhaust flow path 42, so that the exhaust air that has passed through the first heat exchange flow path 221 can directly impinge on the power supply substrate 12. Therefore, the cooling efficiency for the power supply substrate 12 can be improved compared to, for example, indirect cooling via a heat transfer medium such as a wall surface that constitutes the exhaust flow path 4.

[0127] In this embodiment, a water supply body 26 that supplies water to the first heat exchange flow path 221 is disposed in the exhaust flow path 4 downstream of the first heat exchange flow path 221 in the exhaust flow direction. The exhaust air flowing through the first heat exchange flow path 221 is cooled by the latent heat of vaporization of water dripping from the water supply body 26. The cooled exhaust air cools the supply air by exchanging sensible heat with the supply air flowing through the second heat exchange flow path. A branch exhaust flow path branching from the exhaust flow path 4 is formed in the exhaust flow path 4 downstream of the water supply body 26 in the exhaust flow direction. That is, the exhaust flow path 4 downstream of the water supply body 26 includes the branch exhaust flow path and a downstream exhaust flow path 42 downstream of the branch point where the branch exhaust flow path branches. In this case, the branch exhaust flow path corresponds to the second downstream exhaust flow path 422. The first downstream exhaust flow path 421 corresponds to the main flow of the downstream exhaust flow path 42, and an exhaust fan 61 is disposed therein. That is, the first downstream exhaust flow path 421 downstream of the branching portion communicates with the exhaust outlet 43, which discharges the exhaust air outside the air conditioner 1, i.e., outside the main body 11. This arrangement allows the first heat exchange flow path 221 of the sensible heat exchanger, the water supply body 26, the exhaust fan 61, the branching portion, and the power supply board 12 to be arranged in this order in the exhaust flow direction, along the exhaust flow path 4 including the second downstream exhaust flow path 422. The exhaust air that passes through the first heat exchange flow path 221 contains water from the water supply body 26. However, since the power supply board 12, which serves as a heat generating element, is disposed inside the second downstream exhaust flow path 422, the amount of water contained in the circulating exhaust air can be reduced compared to the first downstream exhaust flow path 421. Therefore, the cooling efficiency for the power supply board 12 can be improved by using the cold energy of the exhaust air cooled by the latent heat of vaporization while mitigating the effect of moisture on the power supply board 12.

[0128] In this embodiment, the cross-sectional area of ​​the second downstream exhaust flow path 422 is smaller than the cross-sectional area of ​​the first downstream exhaust flow path 421. For example, the cross-sectional area of ​​the second downstream exhaust flow path 422 may be 1 / 5 or less and 1 / 50 or more of the cross-sectional area of ​​the first downstream exhaust flow path 421. By making the cross-sectional area of ​​the second downstream exhaust flow path 422 smaller than the cross-sectional area of ​​the first downstream exhaust flow path 421 in this manner, the amount of water contained in the exhaust gas flowing through the second downstream exhaust flow path 422 can be relatively reduced.

[0129] In this embodiment, the second downstream exhaust flow path 422 extends from a branching portion, which indicates the point at which the second downstream exhaust flow path 422 branches off in the downstream exhaust flow path 42, to a branched exhaust outlet 427, which serves as the outlet of the second downstream exhaust flow path 422. The branched exhaust outlet 427 may be formed, for example, in a gap in the housing of the air conditioner 1 constituting the main body 11. In this manner, the second downstream exhaust flow path 422 has a flow path length from the branching portion to the branched exhaust outlet 427. The power supply board 12 is disposed between the center of the second downstream exhaust flow path 422 and the branched exhaust outlet 427 along the flow path length of the second downstream exhaust flow path 422. The exhaust gas flowing through the second downstream exhaust flow path 422 contains water from the atomized liquid from the water supply body 26. However, when the water from the liquid, which has a higher specific gravity than air, flows together with the exhaust gas in the second downstream exhaust flow path 422, it tends to adhere to the wall surfaces, etc., constituting the second downstream exhaust flow path 422, and be separated from the exhaust gas. Therefore, by placing the power supply board 12 downstream of the second downstream exhaust flow path 422, the effect of moisture on the power supply board 12 can be mitigated while improving the cooling efficiency for the power supply board 12 by using the cold heat of the exhaust cooled by the latent heat of vaporization.

[0130] In this embodiment, one or more bends 424 are formed in the second downstream exhaust flow path 422 upstream of the power supply substrate 12 in the exhaust flow direction. In other words, one or more bends 424 are formed between the branching portion, i.e., the entrance of the second downstream exhaust flow path 422, and the power supply substrate 12. When the exhaust gas passes through the bends 424 formed in the second downstream exhaust flow path 422, liquid moisture, which has a higher specific gravity than air, is biased to the outside of the bends 424 due to centrifugal force. This separates the moisture from the exhaust gas, i.e., gas-liquid separation occurs. The separated liquid moisture adheres to the inner wall or the like forming the outside of the bends 424. By passing the exhaust gas through the bends 424 in this manner, the water from the water supply body 26 is efficiently separated from the exhaust gas, reducing the impact of the moisture on the power supply substrate 12. The cooling efficiency for the power supply substrate 12 can be improved by using the cold heat of the exhaust gas cooled by the latent heat of vaporization.

[0131] In this embodiment, the second downstream exhaust flow path 422 includes an inlet-side flow path 4221 extending from the branching portion and an outlet-side flow path 4222 downstream of the inlet-side flow path 4221 in the exhaust flow direction. That is, the second downstream exhaust flow path 422 starts from the branching portion in the exhaust flow direction and is configured, in this order, of the inlet-side flow path 4221, the outlet-side flow path 4222, and the branched exhaust outlet 427. The inlet-side flow path 4221 is formed along the top surface 100 and the side surface of the main body 11 that houses the heat exchanger 22. The second downstream exhaust flow path 422 further includes a bent inlet-side connecting portion 425 that connects the inlet-side flow path 4221 along the top surface 100 to the inlet-side flow path 4221 along the side surface. The inlet-side connecting portion 425 has a bent shape and constitutes a part of the bent portion 424. Furthermore, the outlet-side flow path 4222, which is continuous with the inlet-side flow path 4221, is formed along the second side surface 102 adjacent to the first side surface 101. The second downstream exhaust flow path 422 also includes an outlet-side connecting portion 426 that connects the inlet-side flow path 4221 along the first side surface 101 with the outlet-side flow path 4222 along the second side surface 102. The outlet-side connecting portion 426 has a bent shape and constitutes a part of the bending portion 424. By arranging the branch exhaust flow paths along different surfaces of the main body 11 in this way, the branch exhaust flow paths can be made to have a bent shape. In other words, by utilizing the box-like shape of the main body 11, the multiple bending portions 424 in the branch exhaust flow paths can be formed with a relatively simple configuration. In this way, by forming multiple bent shapes, i.e., multiple bent sections 424, in the branched exhaust flow path and passing the exhaust through the multiple bent sections 424, the water in the water supply body 26 can be efficiently separated into gas and liquid from the exhaust, and the impact of the moisture on the power supply board 12 can be mitigated, while the cold heat of the exhaust cooled by the latent heat of vaporization can be used to improve the cooling efficiency for the power supply board 12.

[0132] In this embodiment, a through hole 423 is provided in the bottom of the outlet-side connecting portion 426. Water contained in the exhaust air is discharged through the through hole 423, and the through hole 423 functions as a discharge hole for discharging the water contained in the exhaust air. The bottom of the second downstream exhaust flow path 422, in which the through hole 423 is formed, may correspond to the lowest position in the inlet-side flow path 4221. In this manner, the through hole 423 is formed in the bottom of the outlet-side connecting portion 426 upstream of the power supply board 12. Therefore, water adhering to the inner wall or the like constituting the second downstream exhaust flow path 422 can be guided by gravity to the through hole 423 and discharged to the outside of the second downstream exhaust flow path 422. In this case, a drain pan 91 for receiving water supplied from the water supply body 26 and passed through the first heat exchange flow path 221 may be disposed directly below the through hole 423. In this case, the water discharged from the through hole 423 can also be received by the drain pan 91.

[0133] In this embodiment, the fan motor 6 is a DC motor driven by DC power, which allows for a smaller size of the fan motor 6 compared to, for example, an AC motor. Furthermore, the power supply board 12 uses an AC / DC board that converts AC power to DC power, and even if the AC / DC board generates a relatively large amount of heat, the cooling efficiency of the AC / DC board, which is the power supply board 12, can be improved by using the cold energy of the exhaust air cooled by the latent heat of vaporization.

[0134] In this embodiment, a plurality of electronic components 121 are mounted on the surface of the power supply substrate 12. That is, the power supply substrate 12 is configured using SMT (Surface Mount Technology). The power supply substrate 12 is arranged with the electronic components 121 facing inward into the exhaust flow path 4. That is, the protruding direction of the electronic components 121 is arranged toward the radially inward direction of the branch exhaust flow path, i.e., toward the axial center of the flow path. In other words, the electronic components 121 are arranged between the surface of the power supply substrate 12 and the second side surface 102. By arranging the power supply substrate 12 inside the exhaust flow path 4 with the electronic components 121 facing inward in this manner, the contact area of ​​the electronic components 121 with the exhaust gas can be efficiently secured, and the cooling efficiency of the power supply substrate 12 can be improved.

[0135] In this embodiment, the power supply substrate 12 is formed in a rectangular plate shape, i.e., a rectangular substrate. The rectangular power supply substrate 12 is disposed inside the exhaust flow path 4 with its longitudinal direction aligned with the flow path direction of the branch exhaust flow path. This allows the flow path cross-sectional area of ​​the exhaust flow path 4 to be smaller than when, for example, its lateral direction is aligned with the flow path direction of the branch exhaust flow path. In particular, when the power supply substrate 12 is disposed in a branch exhaust flow path branched from the exhaust flow path 4, the flow path cross-sectional area of ​​the branch exhaust flow path can be made relatively small, thereby preventing the size of the main body 11 from becoming larger.

[0136] In this embodiment, the air conditioner 1 has a first tank 71 and a second tank 72, and these first tank 71 and second tank 72 are detachably mounted within the main body 11 that constitutes the housing or the like of the air conditioner 1. The first tank 71 functions as a main tank that stores water supplied from a water supply or the like. The second tank 72 functions as a sub-tank that holds water supplied from the first tank 71 when the first tank 71 and the second tank 72 are mounted within the main body 11 of the air conditioner 1. The number of first tanks 71 may be, for example, two, and the second tank 72 may be disposed below the two first tanks 71. The volume of the first tank 71 may be larger than the volume of the second tank 72, and the first tank 71 may store water discharged from a water supply or the like when detached from the air conditioner 1. The second tank 72 retains, i.e., holds, water dripping from the first tank 71 located above, and the water retained in the second tank 72 circulates within the air conditioner 1. The main body 11 of the air conditioner 1 has a first tank housing section 13 and a second tank housing section 14, with the first tank 71 housed in the first tank housing section 13 and the second tank 72 housed in the second tank housing section 14. When the first tank 71 is housed in the first tank housing section 13, the lower part of the first tank 71 engages with the first tank housing section 13, thereby restricting horizontal movement of the first tank 71. The second tank 72 engages with the first tank 71 and is located below the first tank 71, and therefore the horizontal movement of the second tank 72 is also restricted by the engagement between the lower part of the first tank 71 and the first tank housing section 13. Therefore, in order to remove the second tank 72 from the main body 11, it is necessary to first remove the first tank 71 from the main body 11, so even if an attempt is made to remove the second tank 72 while the first tank 71 and the second tank 72 are stored, it is possible to prevent the first tank 71 and the second tank 72 from being removed at the same time.In this way, by preventing the first tank 71 and the second tank 72 from being removed at the same time when the second tank 72 is removed, it is possible to prevent damage to the first tank 71 due to damage to the engaging portion between the first tank 71 and the second tank 72, or the first tank 71 falling due to the engagement between the first tank 71 and the second tank 72 being released.

[0137] In this embodiment, the first tank 71 is, for example, a rectangular parallelepiped box 721, and the first tank accommodating portion 13 is composed of a plurality of inner surfaces or inner walls that form a rectangular parallelepiped space corresponding to the shape of the first tank 71 that constitutes the box 721. Of the plurality of inner surfaces that constitute the first tank accommodating portion 13, the bottom surface on which the first tank 71 is placed corresponds to the mounting surface 131, and the mounting surface 131 has a convex portion 132 that protrudes upward. A concave portion 711 that corresponds to the convex portion 132 of the first tank accommodating portion 13 is formed in the lower portion of the first tank 71. When the first tank 71 is accommodated in the first tank accommodating portion 13, the first tank 71 is placed on the mounting surface 131 of the first tank accommodating portion 13, and the lower surface of the first tank 71 and the mounting surface 131 of the first tank accommodating portion 13 are in surface contact with each other. At this time, a protrusion 132 formed on the mounting surface 131 of the first tank housing portion 13 fits into a recess 711 formed on the lower surface, which is the lower part of the first tank 71, thereby engaging the first tank 71 with the first tank housing portion 13, thereby restricting or regulating movement of the first tank 71 in the horizontal direction, i.e., in the direction parallel to the mounting surface 131. By using the protrusion 132 and recess 711 formed in this manner, the first tank 71 can be engaged with the first tank housing portion 13 with a relatively simple structure.

[0138] In this embodiment, the convex portion 132 of the first tank accommodating portion 13 includes an inclined surface that is inclined relative to the mounting surface 131, and is formed in a triangular shape with the mounting surface 131 as the base when viewed in a cross section perpendicular to the mounting surface 131. Alternatively, the mounting surface 131 may be formed in a trapezoidal shape. The inclined surface is formed so that the distance from the mounting surface 131 increases depending on the insertion direction when the first tank 71 is accommodated in the first tank accommodating portion 13, i.e., depending on the depth direction of the first tank accommodating portion 13. In other words, the inclined surface is formed in a tapered shape with respect to the mounting surface 131. The distance between the mounting surface 131 and the inclined surface indicates the distance between the mounting surface 131 and the inclined surface along a perpendicular line perpendicular to the mounting surface 131, i.e., the distance between the intersection of the perpendicular line and the mounting surface 131 and the intersection of the perpendicular line and the inclined surface, and corresponds to the inter-surface distance between the mounting surface 131 and the inclined surface. The taper angle, which is the angle of the inclined surface with respect to the mounting surface 131, may be between 5° and 40°, such as 30°, for example. When the first tank 71 is accommodated in the first tank accommodating section 13, it is assumed that the underside of the first tank 71 comes into contact with the mounting surface 131 of the first tank accommodating section 13 and the first tank 71 is accommodated by sliding on the mounting surface 131 of the first tank accommodating section 13. However, since the convex portion 132 on the mounting surface 131 has a taper angle due to the inclined surface, the first tank 71 can be slid even on the inclined surface. That is, the inclined surface is formed along the depth direction of the first tank accommodating portion 13 so that the surface-to-surface distance with respect to the mounting surface 131 increases, so that when the first tank 71 is inserted into the first tank accommodating portion 13, no step is generated by the convex portion 132 when the first tank 71 comes into contact with the inclined surface, and by continuing the insertion, the first tank 71 can slide on the inclined surface and the convex portion 132 can fit into the concave portion 711. This improves the efficiency of the work when accommodating the first tank 71 in the first tank accommodating portion 13.

[0139] In this embodiment, a water supply tube 712 for supplying water to the second tank 72 is formed at the bottom of the first tank 71. The water supply tube 712 may be, for example, cylindrical or rectangular, and a pipe communicating with the interior space of the second tank 72 may be disposed inside the tube. The water supply tube 712 may be, for example, of a chicken feed type, and when the water level in the second tank 72 falls below the tip of the water supply tube 712, air flows in and the water corresponding to the amount of air that has flowed in is supplied from the first tank 71 to the second tank 72. The convex portion 132 and the water supply tube 712 are formed so that the vertical length of the convex portion 132 is shorter than the vertical length of the water supply tube 712. That is, in the direction perpendicular to the mounting surface 131, the length from the base end of the convex portion 132 on the mounting surface 131 of the first tank housing 13 to the top of the convex portion 132 is shorter than the length from the base end of the tubular water supply portion 712 on the underside of the first tank 71 to the tip end of the tubular water supply portion 712. When removing the first tank 71 from the main body 11, i.e., when pulling the first tank 71 out of the first tank housing 13, the first tank 71 is disengaged from the second tank 72 and the convex portion 132 is disengaged from the recess 711, so the first tank 71 is moved upward relative to the mounting surface 131 of the first tank housing 13. At this time, the engagement between the first tank 71 and the second tank 72 is achieved by inserting the tubular water supply portion 712 of the first tank 71 into the second tank 72. Therefore, when the first tank 71 is removed from the first tank housing 13, the distance by which the first tank 71 is moved upward relative to the mounting surface 131 of the first tank housing 13 is greater than the vertical length of the water supply tubular portion 712, and therefore the moving distance is greater than the vertical length of the protrusion 132. By setting the vertical length relationship between the protrusion 132 and the water supply tubular portion 712 in this manner, when removing the first tank 71 from the first tank housing 13, the operator can remove the first tank 71 without being aware of the engagement between the protrusion 132 and the recess 711, thereby improving the efficiency of the work of removing and attaching the first tank 71.

[0140] In this embodiment, the main body 11 constituting the housing or the like of the air conditioner 1 is formed with a passage opening 113 through which the first tank 71 passes when attaching or detaching the first tank 71. That is, a rectangular passage opening 113 is formed at the bottom of the side surface of the housing for attaching or detaching the first tank 71 and the second tank 72. When the first tank 71 is housed in the first tank housing portion 13, the water supply tube portion 712 of the first tank 71 is located closer to the passage opening 113 than the convex portion 132 of the first tank housing portion 13, i.e., closer to the passage opening 113, and in the first tank 71, the water supply tube portion 712 is located closer to the passage opening 113 than the concave portion 711. The first tank 71 may be provided with a handle portion that can be gripped when attaching or detaching the first tank 71 to or from the first tank housing portion 13. In this case, the water supply tube portion 712 is located closer to the handle than the concave portion 711. In this way, when the first tank 71 is pulled out and removed from the first tank storage section 13, the water supply tube section 712 is located closer to the worker than the protrusion 132, thereby ensuring that the worker can see the water supply tube section 712 and improving work efficiency when removing and attaching the first tank 71.

[0141] In this embodiment, when the first tank 71 is accommodated in the first tank housing portion 13, the first tank 71 is positioned on the mounting surface 131, i.e., the lower inner surface, of the first tank housing portion 13. The first tank housing portion 13 is composed of a plurality of inner surfaces and forms a space for accommodating the first tank 71, and when the first tank 71 is accommodated in the first tank housing portion 13, the upper surface of the first tank 71 is spaced apart from the upper inner surface of the first tank housing portion 13. In this case, the distance between the upper surface of the first tank 71 and the upper inner surface of the first tank housing portion 13, i.e., the inter-surface distance in the vertical direction, is greater than the vertical length of the tubular water supply portion 712 of the first tank 71, i.e., the length by which the tubular water supply portion 712 protrudes from the upper surface of the first tank 71. Therefore, when the first tank 71 is moved upward relative to the second tank 72 to disengage the first tank 71 from the second tank 72 by the water supply tube portion 712, sufficient space for the distance of movement can be secured between the upper surface of the first tank 71 and the upper inner surface of the first tank accommodating portion 13, thereby improving the work efficiency in removing and attaching the first tank 71.

[0142] In this embodiment, a tube hole 723 having an inner diameter larger than the outer diameter of the water supply tube 712 of the first tank 71 is formed in the upper part of the second tank 72, and the tube hole 723 may be formed in a flat lid 722 that opens and closes the opening of the second tank 72. When the first tank 71 is accommodated in the first tank accommodation section 13, the water supply tube 712 of the first tank 71 is inserted into and fitted into the tube hole 723 of the second tank 72, thereby being positioned in the internal space of the second tank 72, thereby engaging the second tank 72 with the first tank 71. By using the water supply tube 712 and the tube hole 723 used when supplying water from the first tank 71 to the second tank 72 in this manner, the second tank 72 and the first tank 71 can be engaged with each other with a relatively simple configuration, i.e., it is not necessary to mold a portion solely for engaging the second tank 72 with the first tank 71.

[0143] In this embodiment, a second tank-side shut-off valve 73 is attached to the second tank 72, and a main body-side shut-off valve 81 is attached to the main body 11. By removing the second tank 72 from the main body 11, i.e., the second tank housing portion 14, the second tank-side shut-off valve 73 and the main body-side shut-off valve 81 are separated, and both the second tank-side shut-off valve 73 and the main body-side shut-off valve 81 are closed. This prevents water from leaking to the outside from the second tank 72 or the supply water channel 8 in which the main body-side shut-off valve 81 is located when the second tank 72 is removed from the main body 11. By housing the second tank 72 in the second tank housing portion 14, the second tank-side shut-off valve 73 and the main body-side shut-off valve 81 are connected in an open state, improving the efficiency of the work involved in removing and installing the second tank 72. In other words, the side shut-off valve and the main body side shut-off valve 81 can be transitioned between a closed state and an open state in conjunction with the attachment and detachment of the second tank 72, eliminating the need for direct operation of the side shut-off valve and the main body side shut-off valve 81 themselves.

[0144] In this aspect, the air conditioner 1 includes a cooling unit 2 that uses water supplied from the second tank 72 to cool air drawn into the main body 11, and a pump 82 that transports water from the second tank 72 to the cooling unit 2. The cooling unit 2 and the second tank 72 are connected by a supply water channel 8. In this configuration, the pump 82, the second tank-side shut-off valve 73, and the main body-side shut-off valve 81 are disposed in the supply water channel 8. The second tank-side shut-off valve 73 and the main body-side shut-off valve 81 are disposed above the pump 82; that is, the pump 82 may be disposed at the lowest part of the supply water channel 8. By disposing the pump 82 below the second tank-side shut-off valve 73 and the main body-side shut-off valve 81 in the supply water channel 8 in this manner, water from the supply water channel 8 corresponding to the elevation difference between the pump 82 and the second tank-side shut-off valve 73 or the main body-side shut-off valve 81, i.e., the head, can be flooded into the pump 82, thereby enabling a configuration that enables priming by hydraulic head. This prevents air from entering the pump 82 and causing the pump 82 to run idle when driven.

[0145] In this embodiment, an in-line filter 732 is disposed in the internal space of the second tank 72. That is, the in-line filter 732 is disposed inside the supply water passage 8 connecting the second tank 72 and the cooling unit 2, and forms part of the supply water passage 8. If foreign matter such as dust is mixed in the passing water, the in-line filter 732 captures the foreign matter. The in-line filter 732 is located upstream of the second tank shut-off valve 73 in the flow direction of the water transported by the pump 82, and therefore can prevent foreign matter from entering the pump 82 or the second tank shut-off valve 73.

[0146] In this embodiment, an opening is formed in the top of the second tank 72, i.e., the second tank 72 includes a box 721 with an open top. A lid 722 is disposed over the opening of the second tank 72 so as to cover the opening, and the lid 722 is configured to be openable and closable between a closed position that covers the opening and an open position that opens the opening. Therefore, when the second tank 72 is removed from the main body 11 and carried, the lid 722 can be set to the closed position to prevent water from overflowing from the second tank 72. Furthermore, when the second tank 72 is removed from the main body 11 and the inside is to be cleaned, the inside of the second tank 72 can be easily cleaned by setting the lid 722 to the open position.

[0147] In this embodiment, the lid 722 is connected to the second tank 72 in an openable and closable manner, and a connection portion 724 between the lid 722 and the open-topped box body 721 includes a hinge 725 and a snap fit 726. The hinge 725 is formed at one end of the second tank 72 in a direction intersecting, for example, perpendicular to the insertion direction when the second tank 72 is accommodated in the second tank housing portion 14. By providing the hinge 725, the lid 722 can be rotated relative to the second tank 72, using the hinge 725 as a fulcrum, to open and close the opening. The snap fit 726 is formed at the other end of the second tank 72, i.e., the end opposite the end where the hinge 725 is formed, in a direction intersecting, for example, perpendicular to the insertion direction when the second tank 72 is accommodated in the second tank housing portion 14. By providing the snap fit 726, the lid 722 can be easily fixed or joined to the second tank 72 by fitting it into the open-topped box 721 that constitutes the second tank 72, taking advantage of the elasticity of the material of the lid 722. In this way, the connection portion 724 of the lid 722 of the second tank 72 has the hinge 725 at one end and the snap fit 726 at the other end, which makes it possible to easily attach the lid 722 to the second tank 72 and also prevents the lid 722 from being attached in an incorrect orientation when attached.

[0148] In this embodiment, a water supply body 26 is disposed above a heat exchanger 22 having a first heat exchange passage 221 through which exhaust air flows and a second heat exchange passage 222 through which supply air flows, and supplies water by dripping water into the first heat exchange passage 221. The water supplied from the water supply body 26 enters the interior of the first heat exchange passage 221 from above and is mixed with exhaust air flowing from below the first heat exchange passage 221, whereupon a portion of the water vaporizes. The water that does not vaporize reaches the lower part of the first heat exchange passage 221 in a liquid state, passes through the first heat exchange passage 221, and is then received in a drain pan 91 disposed below the first heat exchange passage 221. If the opening below the first heat exchange flow path 221 is relatively narrow, some of the liquid water that reaches the lower part of the first heat exchange flow path 221 will adhere to the lower opening of the first heat exchange flow path 221, i.e., the exhaust gas inlet of the first heat exchange flow path 221, without dripping into the drain pan 91, and a meniscus will be generated that blocks the lower opening, i.e., the exhaust gas inlet. In contrast, the air conditioner 1 has a water absorption member 242 that absorbs water supplied from the water supply body 26 and a drip member 243 that drips the water absorbed by the water absorption member 242 toward the drain pan 91, thereby suppressing the destruction or generation of a meniscus and allowing the water that has passed through the first heat exchange flow path 221 to efficiently drip into the drain pan 91. That is, when the air conditioner 1 is normally installed, the water supply body 26, the first heat exchange flow path 221 of the heat exchanger 22, the water absorbent member 242, the dripping member 243, and the drain pan 91 are arranged from top to bottom in this order, so that water supplied from the water supply body 26 to the first heat exchange flow path 221 of the heat exchanger 22 can drip into the drain pan 91 without forming a meniscus at the lower opening of the first heat exchange flow path 221. In this case, the lower part of the first heat exchange flow path 221 and the water absorbent member 242 are spaced apart, and this distance may be shorter than the protrusion length of water droplets that protrude downward in a convex shape due to surface tension at the lower part of the first heat exchange flow path 221. That is, even if the lower part of the first heat exchange flow path 221 and the water absorbent member 242 are arranged out of contact with each other, water droplets formed at the lower part of the first heat exchange flow path 221 can come into contact with the water absorbent member 242 and absorb water. Alternatively, the lower portion of the first heat exchange passage 221 and the water absorbing member 242 may be in contact with each other.This prevents the lower opening of the first heat exchange flow path 221, i.e., the exhaust inlet in the first heat exchange flow path 221, from being blocked by water, ensuring sufficient flow path cross-sectional area, suppressing an increase in ventilation resistance when the exhaust gas flows, and ensuring heat exchange efficiency in the heat exchanger 22.

[0149] In this embodiment, the upper part of the dripping member 243 is in contact with the water-absorbing member 242, so that water absorbed by the water-absorbing member 242 can be efficiently guided toward the dripping member 243. In addition, a plurality of protruding ends 244, for example, ribbed or needle-shaped, are formed on the lower part of the dripping member 243, protruding toward the drain pan 91, i.e., downward. By forming the protruding ends 244 facing downward in this manner, water from the water-absorbing member 242 can be efficiently guided toward the tips of the protruding ends 244 by using interfacial tension or capillary action, and can drip from the tips of the protruding ends 244 into the drain pan 91.

[0150] In this embodiment, at least a portion of the water absorbing member 242 is disposed in a state in which it penetrates into the first heat exchange passage 221 from an opening below the first heat exchange passage 221. The portion of the water absorbing member 242 that penetrates into the first heat exchange passage 221 in this manner increases the area of ​​the water absorbing member 242 that comes into contact with water that has flowed down the first heat exchange passage 221, i.e., the contact area with water, thereby improving the water absorption efficiency of the water absorbing member 242. As a result, even if the amount of water supplied per unit time from the water supply body 26 increases, for example, the unevaporated liquid water can be reliably absorbed by the water absorbing member 242 and dripped into the drain pan 91 via the dripping member 243, thereby efficiently preventing the formation of a meniscus.

[0151] In this embodiment, at least a portion of the water absorbing member 242 is disposed in a state in which it penetrates into the first heat exchange passage 221 from an opening below the first heat exchange passage 221. The portion of the water absorbing member 242 that penetrates into the first heat exchange passage 221 in this manner increases the area of ​​the water absorbing member 242 that comes into contact with water that has flowed down the first heat exchange passage 221, i.e., the contact area with water, thereby improving the water absorption efficiency of the water absorbing member 242. As a result, even if the amount of water supplied per unit time from the water supply body 26 increases, for example, the unevaporated liquid water can be reliably absorbed by the water absorbing member 242 and dripped into the drain pan 91 via the dripping member 243, thereby efficiently preventing the formation of a meniscus.

[0152] In this embodiment, the first heat exchange flow path 221 is formed by a plurality of stacked plate members 232. The plate members 232 may be formed by a membrane member with a thin plate-like wall and a nonwoven fabric attached to the surface. The membrane member is rectangular or square, has a thin wall with high thermal conductivity and shielding properties, and is molded, for example, from resin or metal. The water-absorbing member 242 is molded, for example, from a foam material such as urethane foam, and is molded from a softer material than the membrane member molded from resin or metal. By using a material softer than the material of the membrane member constituting the first heat exchange flow path 221 in this manner, when the water-absorbing member 242 is pressed against the opening below the first heat exchange flow path 221 in the heat exchanger 22, a portion of the water-absorbing member 242 can be relatively easily inserted into the first heat exchange flow path 221.

[0153] In this embodiment, the first heat exchange flow path 221 of the heat exchanger 22 is configured by stacking a plurality of exhaust paths 231, each having a rectangular opening, in the short-side direction of the opening of the exhaust path 231. The dripping member 243 and the water-absorbing member 242 are, for example, integrally formed into a long shape and disposed in the longitudinal center of the opening of each exhaust path 231. If each exhaust path 231 is configured with a spacer, i.e., if the separation distance between two opposing membrane members is ensured by a spacer, the dripping member 243 and the water-absorbing member 242 may be disposed corresponding to the spacer disposed in the central portion of the membrane member. In other words, the dripping member 243 and the water-absorbing member 242, which are integrally formed into a long shape, are disposed so as to intersect, for example, perpendicular to the longitudinal direction of the opening of each exhaust path 231. By arranging the dripping member 243 and the water absorbing member 242 at the center of each opening of the exhaust path 231, i.e., the exhaust inlet, liquid water that reaches the opening of each exhaust path 231, i.e., the exhaust inlet, can be guided to the center of the exhaust path 231 by the water absorbing member 242 and efficiently dripped into the drain pan 91 via the dripping member 243. By arranging the dripping member 243 and the water absorbing member 242 only at the center of the opening of the exhaust path 231 in the longitudinal direction, it is possible to prevent the opening of the exhaust path 231 from being excessively covered, and it is possible to ensure a sufficient flow path cross-sectional area of ​​each exhaust path 231, i.e., the first heat exchange flow path 221, and to suppress an increase in ventilation resistance to the exhaust.

[0154] In this embodiment, the dripping member 243 and the water absorbing member 242, which are integrally formed in a long shape, are disposed at both longitudinal ends of the opening of each exhaust path 231, perpendicular to the longitudinal direction of the opening of each exhaust path 231. If each exhaust path 231 is configured with a spacer, the dripping member 243 and the water absorbing member 242 may be disposed corresponding to the spacers located at both ends. By disposing the dripping member 243 and the water absorbing member 242 at each opening of each exhaust path 231, i.e., at both ends of the exhaust inlet, liquid water that has reached the opening of each exhaust path 231, i.e., the exhaust inlet, can be guided by the water absorbing member 242 to either end of the exhaust path 231 and efficiently dripped into the drain pan 91 via the dripping member 243.

[0155] In this embodiment, the dripping member 243 and the water absorbing member 242 are integrally formed, for example, in an elongated shape and are disposed so as to extend in a direction intersecting the flow direction of the exhaust gas in the first heat exchange passage 221. That is, for the heat exchanger 22 configured in a rectangular parallelepiped shape, the flow direction of the exhaust gas in the first heat exchange passage 221 is from bottom to top, and the dripping member 243 and the water absorbing member 242 are disposed below the heat exchanger 22 so that the ends of the elongated dripping member 243 and the water absorbing member 242 reach opposite side surfaces of the rectangular parallelepiped heat exchanger 22. In this way, by forming the dripping member 243 and the water absorbing member 242 in an elongated shape and disposing them orthogonal to the flow direction of the exhaust gas in the first heat exchange passage 221, it is possible to ensure a contact area between the dripping member 243 and the water absorbing member 242 and the exhaust gas, and it is expected that evaporation of water absorbed in the water absorbing member 242 will be promoted.

[0156] In this embodiment, the heat exchanger 22 is housed in a rectangular parallelepiped case 24 made up of multiple frames and is installed inside the main body 11 that constitutes the housing or the like of the air conditioner 1. The dripping member 243 and the water absorbing member 242, which are formed integrally in a long shape, are configured integrally with the case 24 and are arranged, for example, to bridge two opposing frames among the multiple frames that make up the case 24. By configuring the dripping member 243 and the water absorbing member 242 integrally with the case 24 in this manner, and by housing the heat exchanger 22 in the case 24, it is possible to align the dripping member 243 and the water absorbing member 242 with the first heat exchange flow path 221 of the heat exchanger 22, thereby improving the manufacturability and maintainability of the air conditioner 1.

[0157] Multiple claims may be combined with each other regardless of the form of reference. Multiple dependent claims may be included in the claims, depending on multiple claims. Multiple dependent claims may be included in a multiple dependent claim. If multiple dependent claims are not included in a multiple dependent claim, this does not limit the number of multiple dependent claims that are included in a multiple dependent claim.

[0158] The embodiments disclosed herein are to be considered as illustrative in all respects and not restrictive. The scope of the present invention is defined by the claims, not by the above meaning, and is intended to include all modifications within the meaning and scope of the claims.

[0159] DESCRIPTION OF SYMBOLS 1 Air conditioner 11 Main body (housing) 100 Top surface 101 First side surface (front surface) 102 Second side surface (right surface) 103 Third side surface (rear surface) 104 Fourth side surface (left surface) 105 Bottom surface 111 Cover 112 Attachment / detachment opening 113 Passage opening 12 Power supply board 121 Electronic component 13 First tank accommodating section 131 Placement surface 132 Convex portion 14 Second tank accommodating section 15 Frame body 151 Outer frame 152 Inner frame 16 Lever 17 Link mechanism 171 Linear link portion 172 Roller portion 2 Cooling unit 21 Evaporative filter 211 Evaporative filter water supply section 22 Heat exchanger (sensible heat exchanger) 221 First heat exchange flow path 222 Second heat exchange flow path 231 Exhaust path 232 Plate member 233 Sealing member 24 Heat exchanger case 241 Grip portion 242 Water absorption member 243 Dripping member 244 Protruding end 25 Water supply end 26 Water supply body (water supply portion for sensible heat exchanger) 261 Water supply hole (nozzle) 262 Flow rate restricting portion (plate portion) 3 Intake port 31 Dust collection filter 32 Intake flow path 4 Exhaust flow path (first flow path) 41 Intermediate flow path 42 Downstream exhaust flow path 421 First downstream exhaust flow path 422 Second downstream exhaust flow path 4221 Inlet side flow path 4222 Outlet side flow path 423 Through hole 424 Bent portion 425 Inlet side connecting portion 426 Outlet side connecting portion 427 Branch exhaust outlet 43 Exhaust outlet 5 Air intake flow path (second flow path) 51 Air intake outlet 6 Fan motor 61 Exhaust fan 62 Air supply fan 7 Tank 71 First tank 711 Recess 712 Water supply tube 72 Second tank 721 Box body 722 Lid 723 Tube hole 724 Connection part 725 Hinge 726 Snap fit 73 Second tank side shut-off valve 731 Tank side pin 732 In-line filter 733 Water level float 734 Magnetic sensor 8 Supply water channel 81 Main body side shut-off valve 811 Main body side pin 82 Pump 9 Recovery water channel 91 Drain pan

Claims

1. An air conditioner comprising: a tank for holding water; a heat exchanger having a first heat exchange passage through which exhaust air flows and a second heat exchange passage through which supply air flows, and for exchanging heat between the exhaust air and the supply air; a water supply body for supplying water to the first heat exchange passage; and a supply water passage having a water supply end for supplying water held in the tank to the water supply body, wherein the water supply body includes a plurality of water supply holes formed along its longitudinal direction, and a flow rate restricting section for restricting the flow rate of water supplied from the supply water passage to any one of the plurality of water supply holes.

2. An air conditioner as described in claim 1, wherein the flow path cross-sectional area in the portion of the water supply body where the flow restriction section is located is 50% or less of the flow path cross-sectional area in the portion where the flow restriction section is not located.

3. An air conditioner as described in claim 1, wherein the outlet of the water supply end is positioned closer to one of the ends than to the center of the longitudinal direction of the elongated water supply body, and the flow rate restricting section is positioned in the water supply body at a position corresponding to the connection position with the water supply end and on the side of the one end.

4. The air conditioner according to claim 1, wherein the longitudinal direction of the water supply body and the flow direction of the exhaust gas flowing through the first heat exchange flow path intersect.

5. An air conditioner as claimed in claim 1, wherein each of the plurality of water supply holes has the same inner diameter and is formed at equal intervals in the longitudinal direction of the water supply body.

6. An air conditioner as described in claim 1, wherein at least two of the water supply bodies are arranged along a direction intersecting the flow direction of the exhaust gas flowing through the first heat exchange flow path, the at least two water supply bodies are arranged parallel to the short side direction of the elongated water supply body, and the exhaust gas that has passed through the first heat exchange flow path flows between two adjacent water supply bodies.

7. An air conditioner as described in claim 1, wherein the first heat exchange flow path is formed by a plurality of stacked membrane elements, and the longitudinal direction of the water supply body and the stacking direction of the plurality of membrane elements are parallel.

8. An air conditioner according to claim 7, wherein the distance between two adjacent water supply holes among said plurality of water supply holes is equal to the distance between two adjacent membrane elements among said plurality of membrane elements.

9. An air conditioner as described in claim 1, wherein the plurality of water supply holes include a water supply hole whose water flow rate is restricted by the flow rate restricting section and other water supply holes whose water flow rate is not restricted by the flow rate restricting section, the volumetric flow rate per unit time of water flowing toward any of the water supply holes is less than the volumetric flow rate per unit time of water flowing toward the other water supply holes, and the number of any of the water supply holes is less than the number of the other water supply holes.

10. The air conditioner according to claim 1, wherein the flow rate restricting portion is configured as a plate portion.

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