Injection device and indoor unit of air conditioner

Abstract

To restrain occurrence of stain and mold caused by dust, etc. accumulated on or attached to a heat exchanger.SOLUTION: An injection device 20 injects drain water to an upper heat exchanger 8 provided in an indoor unit 1 of an air conditioner, and comprising a fin 10 and a tube 11. The injection device 20 comprises: an injection part provided so as to be movable along one surface of a heat exchanger 3, and for injecting the drain water to the heat exchanger 3; a detection part for detecting the tube 11 provided in the heat exchanger 3 along a predetermined route on which the injection part moves; and a drive part for moving the injection part on the basis of a detection result of the detection part.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to an injection device and an indoor unit of an air conditioner. [Background technology]

[0002] The indoor unit of an air conditioner includes a housing that forms the outer shell, and a fan and heat exchanger installed inside the housing. The fan introduces outside air into the housing to be supplied to the heat exchanger. Outside air contains dust and other contaminants. Therefore, when outside air is introduced into the housing, dust and other contaminants enter the housing along with the outside air. When dust and other contaminants enter the housing, they accumulate or adhere to the fan and heat exchanger inside the housing, causing dirt and mold to form. To prevent such a situation, a filter that captures dust is provided at the inlet for outside air in the indoor unit of the air conditioner to prevent dust from entering the inside of the housing (for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2013-57640 Summary of the Invention [Problem to be solved by the invention]

[0004] However, dust can enter the housing from various points, and therefore a filter alone cannot prevent all dust from entering. Therefore, even when a filter is provided, dust can accumulate or adhere to the heat exchanger located inside the housing, causing problems such as dirt and mold.

[0005] The present invention has been made in consideration of the above circumstances, and aims to provide an injection device and an indoor unit of an air conditioner that can suppress the growth of dirt and mold caused by dust and the like that has accumulated or adhered to the heat exchanger. [Means for solving the problem]

[0006] In order to solve the above problems, the injection device and the indoor unit of the air conditioner of the present invention employ the following means. An injection device according to one aspect of the present invention is an injection device that is provided in an indoor unit of an air conditioner and injects a fluid onto a heat exchanger having fins and tubes, and includes an injection unit that is movable along one surface of the heat exchanger and injects a fluid onto the heat exchanger, a detection unit that detects a detection target provided on the heat exchanger along a predetermined route along which the injection unit moves, and a drive unit that moves the injection unit based on the detection results of the detection unit.

[0007] In the above configuration, the spray unit moves along a predetermined route along one surface of the heat exchanger and sprays fluid toward the heat exchanger. By spraying the fluid from the spray unit, dust and other particles that have accumulated or adhered to the heat exchanger can be removed. This makes it possible to prevent the growth of dirt and mold caused by dust and other particles that have accumulated or adhered to the heat exchanger.

[0008] Furthermore, the spray unit moves based on the detection result of the detection unit that detects the detection target provided on the heat exchanger along a predetermined route. As a result, by providing the detection target on a desired route, the spray unit can be automatically moved along the desired route. Therefore, the spray unit can automatically spray fluid onto a desired area of ​​the heat exchanger.

[0009] In the injection device according to one aspect of the present invention, the detection object may include the tube provided in the heat exchanger.

[0010] In the above configuration, the tubes provided in the heat exchanger are the detection target. This eliminates the need for a separate detection target for the detector. Therefore, the structure can be simplified compared to a configuration in which a separate detection target is provided in the heat exchanger.

[0011] Furthermore, heat exchangers typically have tubes installed over almost the entire area. In the above configuration, the detection unit detects the tubes installed in the heat exchanger, and the spray unit moves along the tubes. As a result, when tubes are installed over almost the entire area of ​​the heat exchanger, the spray unit automatically sprays fluid over almost the entire area of ​​the heat exchanger, thereby removing dust and other particles that have accumulated or adhered to the heat exchanger.

[0012] Furthermore, the injection device according to one aspect of the present invention may include a shielding portion that is provided on the other surface of the heat exchanger opposite to the one surface, moves in accordance with the injection portion, and receives the fluid injected from the injection portion.

[0013] In the above configuration, a shielding portion is provided to receive the fluid sprayed from the spraying portion. The fluid sprayed from the spraying portion passes through the heat exchanger and is blocked by the shielding portion provided on the other side of the heat exchanger. This makes it possible to prevent the fluid sprayed from the spraying portion from scattering onto other components after passing through the heat exchanger. Therefore, it is possible to prevent damage (corrosion, etc.) to other components caused by the scattered fluid.

[0014] In addition, in an injection device according to one aspect of the present invention, drain water stored in a drain pan provided in the indoor unit may be supplied to the injection unit, and the fluid injected by the injection unit may be the drain water.

[0015] In the above configuration, drain water stored in the drain pan is supplied to the spray unit, and the spray unit sprays the drain water. This allows the fluid sprayed by the spray unit to be supplied from within the indoor unit without being supplied from outside the indoor unit. Therefore, the configuration can be simplified compared to a configuration in which fluid is supplied to the spray unit from outside the indoor unit.

[0016] The injection device according to one aspect of the present invention may further include a power storage unit that stores power from a power supply device provided in the indoor unit, and the drive unit may be driven by the power from the power storage unit.

[0017] In the above configuration, the injection device includes a power storage unit, and the drive unit is driven by power from the power storage unit. This allows the injection unit to be moved without being connected to a cord or the like that supplies power. This reduces restrictions on the movement of the injection unit.

[0018] An indoor unit of an air conditioner according to one aspect of the present invention comprises any of the above-described injection devices, and a heat exchanger having a tube through which a refrigerant flows and fins fixed to the outer surface of the tube, wherein the injection device injects fluid onto the heat exchanger. [Effects of the Invention]

[0019] According to the present invention, it is possible to suppress the occurrence of dirt and mold caused by dust and the like that accumulates or adheres to the heat exchanger. [Brief explanation of the drawings]

[0020] [Figure 1] 1 is a perspective view showing the inside of an indoor unit of an air conditioner according to an embodiment of the present invention. [Figure 2] FIG. 2 is a schematic side view of the heat exchanger and injection device of FIG. 1. DETAILED DESCRIPTION OF THE INVENTION

[0021] An embodiment of an indoor unit of an air conditioner according to the present invention will be described below with reference to the drawings. In the following description, the direction that is horizontal when the indoor unit is installed will be referred to as the left-right direction, and the direction that is up-down when installed will simply be referred to as the up-down direction. The direction perpendicular to these left-right and up-down directions will be referred to as the front-to-rear direction. The front side in the front-to-rear direction will be the side that is closest to you when installed. In the drawings, UP indicates upward, FR indicates forward, and IN indicates inside in the left-to-right direction.

[0022] An indoor unit 1 of an air conditioner will be described using Figure 1. For ease of illustration, part of a housing 27 that forms the outer shell of the indoor unit 1 is omitted in Figure 1.

[0023] The indoor unit 1 of the air conditioner has a housing 2 that forms the outer shell. Inside the housing 2, the indoor unit 1 houses various devices such as a heat exchanger 3, a blower fan (not shown), and a control box (not shown).

[0024] The housing 2 includes a base 4 and a front cover and a front panel that are detachably attached to the front side of the base 4. The front cover and the front panel define the top, left and right side faces, and front face of the housing 2. Note that the front cover and the front panel are omitted from Figure 1 for convenience of illustration.

[0025] The heat exchanger 3 is a so-called plate fin tube type heat exchanger 3. As shown in Figures 1 and 2, the heat exchanger 3 integrally includes a panel-shaped first heat exchanger 9 disposed substantially vertically in the front, a second heat exchanger 8 bending from the upper end of the first heat exchanger 9 and extending rearward and upward, and a third heat exchanger 7 bending from the upper end of the second heat exchanger 8 and extending rearward and downward. The second heat exchanger 8 and the first heat exchanger 9 are connected to each other at an obtuse angle. The second heat exchanger 8 and the third heat exchanger 7 are connected to each other at an acute angle.

[0026] The heat exchanger 3 has a plurality of tubes 11 extending in the left-right direction and through which a refrigerant flows, and a plurality of plate-like fins 10 provided so as to be perpendicular to the direction in which the tubes 11 extend. Each tube 11 is made of copper, and a refrigerant flows through it. The multiple tubes 11 are arranged parallel to each other at a predetermined distance. The multiple tubes 11 form a serpentine piping passage by connecting the open ends of adjacent tubes 11 with U-bent pipes 12. Note that the material of the tubes 11 is an example, and they may be made of a metal other than copper, or may be made of a material other than metal.

[0027] Each fin 10 is made of aluminum. Each fin 10 has a plurality of through holes (not shown) formed therein that penetrate the fin in the thickness direction. Tubes 11 are inserted through the plurality of through holes formed in the fin 10. The tubes 11 are inserted through the through holes so that the outer circumferential surfaces of the tubes 11 contact the edges of the through holes. The plurality of fins 10 are arranged parallel to one another at a predetermined distance. The material of the fins 10 is an example, and the fins 10 may be made of a metal other than aluminum, or may be made of a material other than metal.

[0028] The fins 10 are arranged such that adjacent fins 10 are close to each other. That is, the gaps formed between adjacent fins 10 are set small. Therefore, in FIGS. 1 and 2, the fins 10 are not shown, and the first heat exchanger 9, the second heat exchanger 8, and the third heat exchanger 7 are illustrated as panels. In the following description, the panel surfaces of the panel-shaped first heat exchanger 9, the second heat exchanger 8, and the third heat exchanger 7 are referred to as "surfaces of the heat exchangers." That is, the "surfaces of the heat exchangers" in the following description are actually formed by the side surfaces (surfaces intersecting with the plate surfaces of the fins 10) of the multiple fins 10 arranged side by side.

[0029] A drain pan 14 is provided below the heat exchanger 3. More specifically, the drain pan 14 is provided below the first heat exchanger 9, the second heat exchanger 8, and the third heat exchanger 7. The drain pan 14 receives dripping drain water that is generated when moisture in the air condenses on the surfaces of the tubes 11 of the heat exchanger 3, and also stores the received drain water.

[0030] Next, the injection device 20 provided in the indoor unit 1 and various devices related to the injection device 20 will be described.

[0031] As shown in FIG. 2, the injection device 20 has an injection-side unit 21 that injects drain water to the heat exchanger 3, and a shielding portion 22 that receives the drain water injected from the injection-side unit 21.

[0032] The jet-side unit 21 is provided so as to be movable along one surface 3a, which is the outer surface of the heat exchanger 3. The one surface 3a of the heat exchanger 3 has one surface 9a, which is the front surface of the first heat exchanger 9, one surface 8a, which is one surface of the second heat exchanger 8 that is continuous with the one surface 9a of the first heat exchanger 9, and one surface 7a, which is one surface of the third heat exchanger 7 that is continuous with the one surface 8a of the second heat exchanger 8. The jet-side unit 21 also includes a storage section 23 that stores drain water, a spray section (not shown) that sprays the drain water stored in the storage section 23 toward the heat exchanger 3, a detection section (not shown) that detects tubes 11 provided in the heat exchanger 3, a drive section (not shown) that moves the spray section based on the detection result of the detection section, and a battery (power storage section), not shown, that stores power from a charging port (power supply device) 15 provided in the indoor unit 1.

[0033] Storage section 23 is a bucket-shaped member with an open top, and stores a predetermined amount of drain water. Drain water is supplied to storage section 23 by drain water supply device 16 when injection side unit 21 is positioned at charging port 15 (the state shown in FIG. 1). In the following description, the state in which injection side unit 21 is positioned at charging port 15 is referred to as the "standby state."

[0034] The drain water supply device 16 includes a pump 17 that pumps up drain water stored in the drain pan 14, and a drain water pipe 18 that supplies the drain water pumped up by the pump 17 to a storage section 23 of the jet side unit 21 in a standby state. The downstream end of the drain water pipe 18 is located above the storage section 23 of the jet side unit 21 in a standby state and opens downward. In other words, the drain water pipe 18 is not connected to the jet unit, and by discharging drain water from the downstream end of the drain water pipe 18, the falling drain water is supplied into the storage section 23. The charging port 15 is arranged so that the jet side unit 21 in a standby state is located vertically above the drain pan 14. Therefore, when drain water is supplied to the storage section 23, drain water overflowing from the storage section 23 falls into the drain pan 14.

[0035] The spray unit is provided to face one surface 3a of the heat exchanger 3, and sprays drain water onto the heat exchanger 3. An example of the spray unit is a nozzle. Drain water stored in the storage unit 23 is supplied to the spray unit.

[0036] The detection unit is provided to face one surface 3a of the heat exchanger 3, and detects the tubes 11 (detection target). Note that the ejection side unit 21 according to this embodiment is in contact with the fins 10 fixed to the outer surfaces of the tubes 11, and is therefore not in direct contact with the tubes 11. In other words, the detection unit detects the tubes 11 without being in contact with them (in a non-contact state). Data detected by the detection unit is transmitted to a control device, which will be described later.

[0037] Examples of the detection unit include a camera and an infrared sensor. When a camera is used as the detection unit, the camera is positioned to capture an image of the heat exchanger 3, and the tubes 11 are detected from the captured image data. When an infrared sensor is used as the detection unit, the infrared sensor is set to detect copper. By setting it in this way, it is possible to detect the tubes 11 made of copper.

[0038] The drive unit moves the ejection side unit 21 based on the detection result detected by the detection unit. Specifically, the drive unit moves the ejection side unit 21 so as to follow the tube 11 detected by the detection unit. When the ejection side unit 21 moves to the left-right end of one surface 3a of the heat exchanger 3, the drive unit temporarily stops the ejection side unit 21. Thereafter, the drive unit moves the ejection side unit 21 in a direction intersecting the extension direction of the tube 11. At this time, the drive unit moves the ejection side unit 21 until the detection unit detects the tube 11. Then, when the detection unit detects the tube 11, the drive unit stops the movement of the ejection side unit 21. In this way, by moving the ejection side unit 21, the tube 11 that the detection unit is detecting can be changed from the original tube 11 to an adjacent tube 11.

[0039] The drive unit has a motor and a contact unit that is rotated by the motor and comes into contact with one surface 3a of the heat exchanger 3. Examples of the contact unit include a large diameter roller or a caterpillar. (registered trademark) The large diameter roller is, for example, a roller having a diameter that is sufficiently larger than the gap formed between adjacent fins 10. By using a large diameter roller or caterpillar in this way, the movement of the injection device 20 can be made less susceptible to the influence of gaps formed between adjacent fins 10, depressions, and the like.

[0040] When the injection side unit 21 is in standby mode, the battery receives power from the charging port 15 and stores the power. The stored power is used to drive the drive unit. The charging port 15 is disposed adjacent to the second heat exchanger 8.

[0041] The shielding portion 22 is provided on the other surface 3b, which is the surface (inner surface) opposite to the one surface 3a of the heat exchanger 3, and moves following the injection portion. The other surface 3b of the heat exchanger 3 has the other surface 9b, which is the rear surface of the first heat exchanger 9, the other surface 8b, which is a surface of the second heat exchanger 8 that is continuous with the other surface 9b of the first heat exchanger 9, and the other surface 7b, which is a surface of the third heat exchanger 7 that is continuous with the other surface 8b of the second heat exchanger 8. When the injection side unit 21 moves, for example, along the one surface 8a of the second heat exchanger 8, the shielding portion 22 follows the injection portion so as to be in a position overlapping with the injection side unit 21 when the surface of the second heat exchanger 8 is viewed from the front.

[0042] The ejection side unit 21 and the shielding part 22 are each provided with a magnet part (not shown). The magnet part provided in the ejection side unit 21 and the magnet part provided in the shielding part 22 are configured to attract each other. That is, the ejection side unit 21 and the shielding part 22 attract each other with the heat exchanger 3 in between, and are fixed to each other so as to come into contact with the heat exchanger 3. Furthermore, because the ejection side unit 21 and the shielding part 22 attract each other, when the ejection side unit 21 is moved by a drive part, the shielding part 22 moves so as to follow the ejection side unit 21. That is, the shielding part 22 does not have its own drive part.

[0043] The control device (not shown) receives the data detected by the detection unit and controls the drive unit based on the received data. Specifically, the control device controls the drive unit so that the ejection side unit 21 moves along the tube 11 detected by the detection unit. The control device is composed of, for example, a CPU (Central Processing Unit), RAM (Random Access Memory), ROM (Read Only Memory), and computer-readable storage media. A series of processes for realizing various functions is stored in, for example, a storage medium in the form of a program. The CPU reads this program into RAM and executes information processing and arithmetic operations to realize various functions. The program may be pre-installed in a ROM or other storage medium, provided in a state stored in a computer-readable storage medium, or distributed via wired or wireless communication means. Examples of computer-readable storage media include magnetic disks, magneto-optical disks, CD-ROMs, DVD-ROMs, and semiconductor memories.

[0044] Next, the operation of the injection device 20 according to this embodiment will be described. When the air conditioner is in operation, the injection side unit 21 of the injection device 20 is located at the charging port 15 and is in a standby state. In the standby state, drain water is supplied to the reservoir 23 of the injection side unit 21 by the drain water supply device 16. In addition, power is transferred from the charging port 15 to the battery of the injection side unit 21.

[0045] Cleaning of the heat exchanger 3 by the injection device 20 is performed while the air conditioner is stopped. When cleaning starts, first, the injection side unit 21 moves from the charging port 15 to one surface 8a of the second heat exchanger 8. At this time, the shielding part 22 also follows the injection side unit 21 and moves to the other surface 8b of the second heat exchanger 8. After moving to one surface 8a of the second heat exchanger 8, the injection side unit 21 detects the tube 11 with its detection part and moves along the extension direction of the tube 11. At this time, the shielding part 22 also moves following the injection side unit 21.

[0046] While the injection side unit 21 is moving, the injection section injects drain water toward the second heat exchanger 8. When the drain water is injected, the water pressure of the drain water removes dust and other particles that have accumulated on or adhered to the second heat exchanger 8. The injected drain water also passes between adjacent fins 10 and reaches the other surface 8b of the second heat exchanger 8. The drain water that has reached the other surface 8b of the second heat exchanger 8 is received by the shielding section 22. The drain water received by the shielding section 22 drips from the surface of the shielding section 22 and falls into the drain pan 14 arranged below the heat exchanger 3.

[0047] When the ejection side unit 21 moves to the left-right end of one surface 8a of the second heat exchanger 8, the ejection side unit 21 stops temporarily. Thereafter, the ejection side unit 21 moves along one surface 8a of the second heat exchanger 8 in a direction intersecting the extension direction of the tube 11. At this time, the ejection side unit 21 moves until the detection unit detects the tube 11. Then, when the detection unit detects the tube 11, the ejection side unit 21 stops moving. In this way, by moving the ejection side unit 21, the tube 11 that the detection unit is detecting can be changed from the original tube 11 to an adjacent tube 11.

[0048] Next, the ejection side unit 21 again detects the tube 11 using the detection unit, and moves along the extension direction of the tube 11. At this time, the ejection side unit 21 moves in the opposite direction to the previous traveling direction. By moving in this manner, the ejection device 20 (the ejection side unit 21 and the shielding unit 22 following the ejection side unit 21) makes a U-turn. The injection device 20 makes repeated U-turns to clean almost the entire area of ​​the second heat exchanger 8. After cleaning the second heat exchanger 8, the injection device 20 then cleans the first heat exchanger 9 or the third heat exchanger 7 in the same manner as the second heat exchanger 8.

[0049] In this way, the injection side unit 21 makes multiple U-turns as shown in trajectory (route) A in FIG. 1, cleaning almost the entire area of ​​the heat exchanger 3. When it reaches the end of trajectory A, the injection side unit 21 stops injecting drain water. The injection side unit 21 then moves to the charging port 15 and enters a standby state at the charging port 15. In this way, the injection device 20 according to this embodiment moves along the tube 11. In other words, the tube 11 is arranged along the route along which the injection device 20 moves.

[0050] According to this embodiment, the following advantageous effects are achieved.

[0051] In this embodiment, the spray unit sprays drain water toward the heat exchanger 3. By spraying the drain water from the spray unit, it is possible to remove dust and the like that has accumulated on or adhered to the heat exchanger 3. This makes it possible to suppress the growth of dirt and mold that is caused by dust and the like that has accumulated on or adhered to the heat exchanger 3.

[0052] Furthermore, the spray unit moves based on the detection result of the detection unit that detects the detection target provided on the heat exchanger 3 along a predetermined route. As a result, by providing the detection target on a desired route, the spray unit can be automatically moved along the desired route. Therefore, the spray unit can automatically spray drain water onto a desired area of ​​the heat exchanger 3.

[0053] In this embodiment, the injection side unit 21 moves based on the detection result of a detection unit that detects the tubes 11 provided in the heat exchanger 3. As a result, the injection device 20 can be moved without providing the heat exchanger 3 with a mechanism (rails, etc.) for moving the injection device 20 along a predetermined route. This makes it possible to simplify the structure. In addition, the tubes 11 that are already provided in the indoor unit 1 are used as the detection target. This eliminates the need to provide a separate detection target for the detection unit to detect. This makes it possible to simplify the structure compared to a configuration in which a separate detection target is provided in the heat exchanger 3.

[0054] In this embodiment, the detection unit detects the tubes 11 provided over almost the entire area of ​​the heat exchanger 3, and the spray unit moves along the tubes 11. This allows the spray unit to automatically spray drain water over almost the entire area of ​​the heat exchanger 3, thereby removing dust and other particles that have accumulated or adhered to the heat exchanger 3.

[0055] In this embodiment, a shielding portion 22 is provided to receive the drain water sprayed from the spray portion. The drain water sprayed from the spray portion passes through the heat exchanger 3 and is shielded by the shielding portion 22 provided on the other surface 3b of the heat exchanger 3. This makes it possible to prevent the drain water sprayed from the spray portion from scattering onto other components after passing through the heat exchanger 3. Therefore, it is possible to prevent damage (corrosion, etc.) to other components caused by the scattered drain water.

[0056] In this embodiment, drain water stored in the drain pan 14 is supplied to the spray section, and the spray section sprays the drain water. This allows the drain water sprayed by the spray section to be supplied from within the indoor unit 1 without being supplied from outside the indoor unit 1. Therefore, the configuration can be simplified compared to a configuration in which drain water is supplied to the spray section from outside the indoor unit 1. In this embodiment, a drain pan 14 is provided below the heat exchanger 3. As a result, the drain water shielded by the shielding portion 22 drips from the shielding portion 22 into the drain pan 14. This allows the drain water to circulate, and reduces the amount of drain water.

[0057] In this embodiment, the injection device 20 is equipped with a battery, and the drive unit is driven by power from the battery. This allows for a structure in which a cord or the like for supplying power is not connected when the injection side unit 21 moves. Therefore, restrictions on the movement of the injection side unit 21 can be reduced.

[0058] The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention. For example, in the above embodiment, an example in which the sprayer 20 is provided in the indoor unit 1 has been described, but the present invention is not limited to this. The sprayer 20 may be configured to be attachable to the indoor unit 1. That is, the sprayer 20 may be attached only when cleaning the heat exchanger 3 and removed when cleaning is completed. In this case, it is preferable to form an opening in the housing 2 of the indoor unit 1 corresponding to the cleaning start position of the sprayer 20, and attach the sprayer 20 to the heat exchanger 3 through this opening. Also, in this case, as described in the above embodiment, the indoor unit 1 may be provided with a charging port 15 and a drain water supply device 16. Alternatively, the indoor unit 1 may not be provided with the charging port 15 and the drain water supply device 16, and may be attached to the indoor unit 1 with electricity stored in the battery and water stored in the storage section 23.

[0059] In the above embodiment, an example was described in which the injection device 20 has a power storage unit, but the present invention is not limited to this. The device that supplies power to the drive unit may be a battery (primary battery) that can only discharge. With this configuration, there is no need to provide a charging port 15 in the indoor unit 1, and space within the indoor unit 1 can be saved.

[0060] In the above embodiment, an example in which the drain water supply device 16 is provided in the indoor unit 1 has been described, but the present invention is not limited to this. For example, the drain water supply device may be provided in the injection device 20.

[0061] In the above embodiment, an example has been described in which the detection unit of the injector 20 detects the tube 11 and the injector 20 moves along the tube 11, but the present invention is not limited to this. For example, a line may be drawn on the surface of the heat exchanger 3, and the detection unit of the injector 20 may detect this line and move the injector 20 along the line.

[0062] In the above embodiment, the first heat exchanger 9, the second heat exchanger 8, and the third heat exchanger 7 are integrally provided, but the present invention is not limited to this. For example, the first heat exchanger 9, the second heat exchanger 8, and the third heat exchanger 7 may be connected by a connecting member such as a bracket. [Explanation of symbols]

[0063] 1: Indoor unit 2: Housing 3: Heat exchanger 3a: One side 3b: Other side 4: Bass 7:Third heat exchanger 8:Second heat exchanger 9: 1st heat exchanger 10: Finn 11: Tube 12: U-bent pipe 14: Drain pan 15: Charging port 16: Drain water supply device 17: Pump 18: Drain water piping 20: Injection device 21: Injection side unit 22: Shielding part 23: Storage section A: Orbit

Claims

1. An injection device that injects a fluid onto a heat exchanger that is provided in an indoor unit of an air conditioner and has fins and a plurality of tubes that are arranged parallel to each other, an injection side unit including: an injection part provided movably along one surface of the heat exchanger and injecting a fluid onto the heat exchanger; a detection part that detects a detection target provided on the heat exchanger along a predetermined route along which the injection part moves; and a drive part that moves the injection part along the detection target detected by the detection part; a shielding portion provided on the other surface of the heat exchanger opposite to the one surface thereof, the shielding portion moving along with the jetting portion and receiving the fluid jetted from the jetting portion; the drive unit has a motor and a contact unit that is rotationally driven by the motor and comes into contact with one surface of the heat exchanger, the ejection side unit and the shielding part are each provided with a magnet part, and the magnet part provided in the ejection side unit and the magnet part provided in the shielding part are configured to attract each other, the ejection side unit and the shielding portion are attached to the heat exchanger by being fixed to each other so as to come into contact with the heat exchanger by sandwiching the heat exchanger between them and pulling each other, An injection device that is movable in the extension direction of the tube and in a direction intersecting the extension direction of the plurality of tubes.

2. The injection device according to claim 1 , wherein the detection target includes the tube provided in the heat exchanger.

3. Drain water stored in a drain pan provided in the indoor unit is supplied to the injection section, 3. The injection device according to claim 1, wherein the fluid injected by the injection portion is the drain water.

4. a power storage unit that stores power from a power supply device provided in the indoor unit; 4. The injection device according to claim 1, wherein the drive unit is driven by electric power from the power storage unit.

5. a heat exchanger having tubes through which a refrigerant flows and fins fixed to the outer surfaces of the tubes; An indoor unit of an air conditioner comprising the injection device according to any one of claims 1 to 4.

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