JP3831703B2 - Cleaning system and cleaning method for air conditioner - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a cleaning system and a cleaning method for an air conditioner that can automatically clean an inner surface of a casing of an air conditioner and a heat exchanger.
[0002]
[Prior art]
Food factories (especially bread factories, confectionery factories, noodle mills, flour mills, etc.) and pharmaceutical factories have rooms that handle large amounts of powder. Air conditioning in such rooms is generally performed by using a blower. A system is adopted in which the air is sucked and passed through a heat exchanger for heat exchange and then introduced into the room. In that case, the powder adheres to the inside of the heat exchanger or air conditioner and the inside of the air conditioner becomes unsanitary. There was a problem of causing trouble. In order to avoid this, a filter may be provided on the heat exchanger inlet side, but the filter is clogged with powder, and the air-conditioning function is reduced as described above.
[0003]
In order to solve this problem, the present applicant has proposed a package air conditioner capable of being internally cleaned in Patent Document 1 in which an air passage portion such as a heat exchanger or an air conditioner can be cleaned with water. Although this air conditioner can efficiently remove the powder adhering to the inside of the heat exchanger and air conditioner, the cleaning method is a method in which the operator opens the air passage part of the door and sprays it with water. For this reason, there has been a demand for further labor saving in the cleaning work. In addition, there is concern about increasing the humidity in the working room during cleaning, and measures for maintaining low humidity in the manufacturing environment have also been an issue. Furthermore, since a cleaning operation is required through manual operation at the time of cleaning, the installation form is limited to a floor-standing type.
[0004]
On the other hand, Patent Document 2 discloses a technique for automatically cleaning oily dirt adhering to a heat exchanger of an air conditioner using a swivel type cleaning nozzle. However, since there is no drainage means in the air conditioner for efficiently treating the large amount of washing wastewater generated, it is necessary to prepare drainage means such as drain receptacles and drainage reservoirs manually during cleaning. And the cleaning work was inefficient.
[0005]
[Patent Document 1]
Japanese Patent No. 3159585 [0006]
[Patent Document 2]
Japanese Patent Laid-Open No. 8-178591
[Problems to be solved by the invention]
The present invention has been made in view of the above circumstances, and is a cleaning system for an air conditioner that is capable of automatically and effectively cleaning powder adhering to an inner surface of a casing or a heat exchanger of an air conditioner and having excellent cleaning efficiency. And a cleaning method.
[0008]
[Means for Solving the Problems]
To accomplish the above object is for the heat exchanger for passing air to automatically clean the air conditioner provided in the casing, the upstream side and lower stream side of the heat exchanger A heat exchanger cleaning device using a cleaning nozzle that irradiates cleaning fluid linearly toward the heat exchanger so as to face the heat exchanger and intensively injects the cleaning fluid that cleans the heat exchanger at high pressure, and washing for injecting cleaning fluid for cleaning the upstream and distributed injected to the inner surface of the casing of the heat exchanger upstream and heat exchanger downstream of the cleaning fluid from the lower stream side of the heat exchanger in a radial The cleaning is performed for a predetermined time using one of the casing cleaning apparatuses using the nozzle, and then the other cleaning apparatus is used for cleaning.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below in detail with reference to the drawings.
[0010]
FIG. 1 is a configuration explanatory view showing an embodiment of a cleaning system for an air conditioner according to the present invention.
[0011]
That is, three air conditioners 11 ₁ , 11 ₂ , 11 ₃ are arranged in the ceiling of a building such as a food factory (especially a bread factory, a confectionery factory, a noodle factory, a flour mill, etc.) or a pharmaceutical factory. The air conditioners 11 ₁ , 11 ₂ , and 11 ₃ are connected to the outdoor unit 13 provided on the roof or the like by the refrigerant pipe 12, and the refrigerant from the outdoor unit 13 passes through the refrigerant pipe 12 to each air conditioner 11 ₁ , 11. _2, it is circulated and supplied to the 11 _3. One end of each return air duct 14 ₁ , 14 ₂ , 14 ₃ is connected to each air conditioner 11 ₁ , 11 ₂ , 11 _3, and the other end of each return air duct 14 ₁ , 14 ₂ , 14 ₃ is a ceiling. It is opened to the surface and constitutes an indoor return vent. Further, one end of each of the air supply ducts 15 ₁ , 15 ₂ , 15 ₃ is connected to each of the air conditioners 11 ₁ , 11 ₂ , 11 _3, and the other end of each of the air supply ducts 15 ₁ , 15 ₂ , 15 ₃ . Is opened in the ceiling surface and constitutes an indoor air inlet. For example, the indoor air of the air-conditioning target room 16 such as a measuring room or a molding room is supplied from the indoor return port to the air conditioners 11 ₁ , 11 ₂ , 11 ₃ through the return air ducts 14 ₁ , 14 ₂ , 14 _3. The heat-exchanged air is supplied into the air-conditioning target room 16 through the air supply ducts 15 ₁ , 15 ₂ , and 15 ₃ from the indoor air supply port. Each air conditioner 11 ₁ , 11 ₂ , 11 ₃ is connected to a cleaning fluid tank 19 via a cleaning fluid pump 18 provided on the roof or the like by a cleaning fluid pipe 17. For example, a cleaning fluid such as cleaning water is supplied to the air conditioners 11 ₁ , 11 ₂ , and 11 ₃ through the cleaning fluid pipe 17 to clean the air conditioners 11 ₁ , 11 ₂ , and 11 ₃ . A drain pipe 20 is connected to the lower part of each of the air conditioners 11 ₁ , 11 ₂ , 11 ₃ , and the waste water after washing is discharged through the drain pipe 20. Each air conditioner 11 ₁ , 11 ₂ , 11 ₃ is connected to a drying outside air duct 21 and a drying exhaust duct 22. The drying outside air duct 21 is provided with a drying outside air fan 23 and a drying exhaust duct 22. Is provided with a drying exhaust fan 24. The outside air is taken in by the drying outside air fan 23 and supplied to the air conditioners 11 ₁ , 11 ₂ , 11 ₃ through the drying outside air duct 21 to dry the air conditioners 11 ₁ , 11 ₂ , 11 ₃ . The air after drying the air conditioners 11 ₁ , 11 ₂ , 11 ₃ is exhausted to the outside through the drying exhaust duct 22 by the drying exhaust fan 24. In the figure, 25 is a control device that performs operation control including cleaning and drying of an air conditioner, 26 is a floor surface, 27 is a ceiling surface, 28 is a rooftop, and the like.
[0012]
2 and 3 are a side configuration explanatory view and a top configuration explanatory view showing an example of the internal automatic cleaning air conditioner according to the present invention.
[0013]
The casing 31 of the air conditioner 11 is configured in a box shape by an outer plate such as a water / corrosion resistant plate that is processed so that a heat insulating material is confined inside and the heat insulating material is not exposed on the inner surface of the casing. An air inlet opening / closing device (air conditioning high-density damper) 32 is provided at an air conditioning air inlet (for indoor return air) provided in the casing 31, and the air inlet opening / closing device 32 includes an air inlet opening / closing device. An actuator for automatically operating the opening and closing of 32 is provided. A first cleaning chamber 33 is provided on the downstream side of the air conditioning air from the air inlet opening and closing device 32 in the casing 31. The first cleaning chamber 33 includes a cleaning fluid tank installed outside the air conditioner, A casing cleaning nozzle 34 and a heat exchanger cleaning nozzle 35 for injecting a cleaning fluid such as water are connected to a cleaning fluid supply device such as a pump, a pipe, and a valve, and a first cleaning chamber 33 is provided. A drain pan 36 having an inverted triangular cross section is provided at the bottom of the casing corresponding to the above. The casing cleaning nozzle 34 is provided with one that can spray a cleaning fluid radially so that the interior of the first cleaning chamber 33 of the casing 31 can be thoroughly cleaned. The number of casing cleaning nozzles 34 is not limited to one, and a plurality of casing cleaning nozzles 34 may be provided.
[0014]
A heat exchanger 37 that allows air to pass is provided downstream of the first cleaning chamber 33 in the casing 31 from the air-conditioning air. The heat exchanger 37 is composed of, for example, a cross-fin coil type direct expansion coil, adjusts the amount of refrigerant with a refrigerant solenoid valve, circulates the refrigerant through the direct expansion coil, and cools the direct expansion coil via the expansion valve. Alternatively, the air passing through the directly expanded coil is cooled or heated by heating. It is desirable that the fin pitch of the heat exchanger 37 is larger than that generally used for air conditioning so that the powder does not easily accumulate and the cleaning fluid is sufficiently distributed in the coil. However, an excessively long fin pitch not only reduces the heat exchange efficiency, but also increases the apparatus scale and the apparatus cost. For this reason, in this embodiment, the fin pitch is set to about 4 mm so that the maximum cleaning effect can be exhibited without deteriorating the cooling or heating performance.
[0015]
The drain pan at the bottom of the casing corresponding to the heat exchanger 37 is preferably not shared and shared with the drain pan 36 in the first cleaning chamber. The reason for this is that if a separate drain pan for the coil part is provided, the cleaning fluid that is highly contaminated flows into the drain pan for the coil part during the cleaning, although the cleaning fluid does not flow so much. This is because the piping may be clogged.
[0016]
A second cleaning chamber 38 is provided on the downstream side of the air for air conditioning from the heat exchanger 37 in the casing 31. The second cleaning chamber 38 includes a cleaning fluid tank, a pump, and the like installed outside the air conditioner. A casing cleaning nozzle 39 and a heat exchanger cleaning nozzle 40 which are connected to a cleaning fluid supply device such as a pipe and a valve and inject a cleaning fluid such as water are provided and correspond to the second cleaning chamber 38. A drain pan 41 having an inverted triangular cross section is provided at the bottom of the casing. The casing cleaning nozzle 39 is provided with one that can spray a cleaning fluid radially so that the inside of the second cleaning chamber 38 of the casing 31 can be thoroughly cleaned. The number of casing cleaning nozzles 39 is not limited to one, and a plurality of nozzles may be provided.
[0017]
The heat exchanger cleaning nozzle 35 and the heat exchanger cleaning nozzle 40 jet the cleaning fluid at the same time so as to face each other from both sides of the heat exchanger 37, and the cleaning fluid is ejected from the upstream side surface of the heat exchanger 37 and It injects to each downstream side. The heat exchanger cleaning nozzles 35 and the heat exchanger cleaning nozzles 40 are respectively provided in two stages in the vertical direction, three in the horizontal direction, and six in each. The heat exchanger cleaning nozzle 35 and the heat exchanger cleaning nozzle 40 are each selected so that the injection surface of the cleaning fluid to the heat exchanger 37 is substantially square, and heat exchange is performed more than the casing cleaning nozzle. The cleaning fluid sprayed from a plurality of nozzles is disposed near the heat exchanger 37 at a position where it can be sprayed to the entire upper and downstream sides of the heat exchanger 37 without overlapping. The reason why the jetting surface of the cleaning fluid to the heat exchanger 37 is not overlapped is to prevent the cleaning fluid from colliding and canceling out due to the overlap, thereby reducing the cleaning effect. The number of the heat exchanger cleaning nozzles 35 and 40 depends on the size of the heat exchanger 37 selected based on the air conditioning function and the jetting characteristics of the cleaning nozzle, and is necessarily 3 × 2 stages each. It is not necessary to have the configuration.
[0018]
An air outlet opening / closing device (air conditioning high-density damper) 42 is provided at the air outlet for air conditioning (for indoor air supply) of the second cleaning chamber 38, and the air outlet portion opening / closing device 42 has an air outlet portion. An actuator for automatically operating opening / closing of the opening / closing device 42 is provided. A blower 43 is provided downstream of the air outlet opening / closing device 42 so as to allow the air conditioning air to pass in the direction of the arrow 44.
[0019]
A refrigerant flow solenoid valve 45 is provided in the outgoing pipe or return pipe of the refrigerant pipe connected to the heat exchanger 37, and casing cleaning is provided in the cleaning fluid pipe connected to the casing cleaning nozzles 34, 39. An electromagnetic valve 46 for cleaning is provided, and a cleaning fluid piping connected to the heat exchanger cleaning nozzles 35, 40 is provided with a heat exchanger cleaning electromagnetic valve 47. The drain pans 36 and 41 are connected to a common drain pipe. The drain pans 36 and 41 are not limited to those having an inverted triangular cross section as described above, and are directed toward the deep type and the drain discharge port so that the cleaning fluid can be quickly guided to the drain discharge port without stagnation. As long as it has an inclined bottom surface, the shape is not limited.
[0020]
The heat exchanger cleaning nozzles 35 and 40 to which the cleaning fluid is supplied via the heat exchanger cleaning electromagnetic valve 47 constitute a heat exchanger cleaning device. The heat exchanger cleaning nozzle 35 cleans the heat exchanger 37 by spraying a cleaning fluid only from the upstream side of the heat exchanger 37 toward the heat exchanger 37 using a cleaning nozzle having a fixed injection direction. The heat exchanger cleaning nozzle 40 cleans the heat exchanger 37 by spraying a cleaning fluid only from the downstream side of the heat exchanger 37 toward the heat exchanger 37 using a cleaning nozzle having a fixed injection direction.
[0021]
The casing cleaning nozzles 34 and 39 to which the cleaning fluid is supplied via the casing cleaning electromagnetic valve 46 constitute a casing cleaning device. The casing cleaning nozzle 34 uses a cleaning nozzle that jets radially to inject a cleaning fluid from the upstream side of the heat exchanger onto the inner surface of the casing so that the casing inner surface on the upstream side of the heat exchanger includes the upstream side surface of the heat exchanger 37. And wash. The casing cleaning nozzle 39 uses a cleaning nozzle that jets radially to inject cleaning fluid from the downstream side of the heat exchanger onto the inner surface of the casing so that the casing inner surface on the downstream side of the heat exchanger includes the downstream side surface of the heat exchanger 37. And wash.
[0022]
The heat exchanger cleaning device and the casing cleaning device are cleaned from the cleaning fluid supply device by opening and closing the heat exchanger cleaning electromagnetic valve 47 and the casing cleaning electromagnetic valve 46, respectively, based on an instruction from the control device 25. The working fluid is sequentially supplied.
[0023]
A drying fluid inlet portion (drying damper) 48 is provided on the downstream side of the heat exchanger of the casing 31, and a drying fluid outlet portion (drying damper) 49 is provided on the upstream side of the heat exchanger of the casing 31. A drying fluid flows into the casing 31 through the drying fluid inlet 48 and a drying fluid such as air flows out of the casing 31 through the drying fluid outlet 49 to allow the inner surface of the casing 31 to The heat exchanger 37 is dried. The drying fluid flows in the direction of arrow 50.
[0024]
Controller 25 shown in FIG. 1 performs operation control of the air conditioner _{11 1,} 11 2, 11 _3, as the operation mode during operation of the air conditioner _{11 1,} 11 2, 11 _3,
(1) Air conditioning operation in which cleaning fluid and drying fluid are not supplied to the air conditioners 11 ₁ , 11 ₂ , 11 ₃ and conditioned air generated via the heat exchanger 37 is supplied to the air conditioning target room 16 mode.
[0025]
(2) The air inlet / outlet opening / closing devices 32 and 42 are closed, and the cleaning fluid supply device supplies the cleaning fluid to the air conditioners 11 ₁ , 11 ₂ , and 11 ₃ to clean the heat exchanger 37 and the inner surface of the casing 31. Cleaning operation mode.
[0026]
▲ 3 ▼ drying fluid to the air conditioner _{11 1,} 11 2, the air conditioner ₁₁ is supplied to the 11 _{3 1,} 11 2, 11 ₃ interior drying operation mode for drying the.
[0027]
Do one of the following: In the cleaning operation mode, the control device 25 controls the cleaning fluid supply device so that the cleaning fluid is supplied only to either the heat exchanger cleaning device or the casing cleaning device, and performs heat exchange. After cleaning the inner surface of the container 37 or the casing 31 for a predetermined time, the cleaning fluid supply device is controlled so that the cleaning fluid is supplied only to the other cleaning device to clean the inner surface of the casing 31 or the heat exchanger 37. . In this embodiment, the cleaning time by the heat exchanger cleaning device and the cleaning time by the casing cleaning device are both about 1 minute. During cleaning, the cleaning fluid pump 18 is set to a rated operation. When cleaning the casing, the cleaning fluid is sprayed onto the inner surface of the casing including the surface of the heat exchanger as described above, so the cleaning time of the substantial heat exchanger is 2 minutes longer than the other cleaning target areas. It will be about. In the air conditioner, the amount of powder adhering to the heat exchanger is larger than the amount of powder adhering to the inner surface of the casing. Accordingly, a process of intensively injecting the cleaning fluid at high pressure from the heat exchanger cleaning nozzles 35, 40 located near the heat exchanger 37, and the casing cleaning nozzle 34, located far from the heat exchanger 37, If the process of spraying the cleaning fluid in a dispersed manner from 39 is executed individually and stepwise, both the time required for cleaning and the consumption of the cleaning fluid can be reduced, depending on the degree of contamination in the heat exchanger 37 and the casing 31. Extremely effective cleaning.
[0028]
FIG. 4 is a characteristic diagram showing an example of the operation of each part in the internal automatic cleaning air conditioner according to the present invention.
[0029]
That is, the air conditioning fan 43 is activated only during the normal air conditioning period. The air inlet / outlet opening / closing devices 32 and 42 are opened only during the normal air-conditioning period. The cleaning preparation (air-conditioning stop) period is gradually closed to the closed state, and the air-conditioning preparation period is gradually opened to the open state. The heat exchanger cleaning electromagnetic valve 47 is opened only during the heat exchanger cleaning period. The casing cleaning electromagnetic valve 46 is opened only during the casing cleaning period. The cleaning fluid pump 18 is activated only during the heat exchanger cleaning period and the casing cleaning period. The drying fluid inlet / outlet portions 48 and 49 are opened only during the drying period in the air conditioner. The drying fans 23 and 24 are activated only during the drying period in the air conditioner. The refrigerant flow solenoid valve 45 is opened only during the normal air conditioning period and the air conditioning preparation period. When the cleaning fluid is sprayed (cleaning operation mode), the air inlet / outlet opening / closing devices 32 and 42 and the drying fluid are used so that the cleaning fluid does not leak into the air conditioning air flow path or the drying fluid flow path outside the air conditioner. The fluid inlet / outlet portions 48 and 49 are both controlled to be closed.
[0030]
The internal automatic cleaning air conditioner according to the present invention can automatically clean the powder adhering to the inside of the air conditioner without manual intervention. This air conditioner is equipped with an automatic cleaning mechanism and an automatic drying mechanism in the machine, so that the air conditioner body can be installed on other than the floor and the influence on the indoor humidity environment during and after cleaning is suppressed. be able to. In addition, this air conditioner, in order to clean the heat exchanger as a cleaning method, first injects the cleaning fluid linearly toward the dirty heat exchanger, while providing a time difference from the heat exchanger cleaning. In order to clean the inside of the air conditioner, the cleaning fluid is sprayed so that the cleaning fluid is distributed throughout the interior, or conversely, in order to clean the inside of the air conditioner, the cleaning fluid is first distributed throughout the interior. The cleaning fluid is jetted in a straight line toward the heat exchanger that is heavily contaminated in order to clean the heat exchanger while providing a time difference from the casing cleaning. A stepwise cleaning method is adopted. Therefore, by not requiring a large amount of cleaning fluid, not only the piping diameter for cleaning fluid conveyance can be reduced, but also the required storage fluid amount of cleaning fluid and the cleaning fluid pump can be reduced, and the system There is an advantage of downsizing and simplification. In addition, the dirt accumulated in the heat exchanger after spraying the cleaning fluid has the property of being discharged outside the heat exchanger over time, but by adopting an individual and stepwise cleaning method as a cleaning method There is an advantage that pollutants are sufficiently discharged.
[0031]
Although the preferred embodiment of the present invention has been described above, the embodiment of the present invention is not limited to the above-described example.
[0032]
For example, if a fluid containing a sterilizing / disinfecting agent is used as the cleaning fluid instead of the cleaning water, the inside of the air conditioner can be sterilized and sanitized. Moreover, if hot air is used instead of outside air as the drying fluid, drying can be performed more effectively.
[0033]
In this embodiment, the heat exchanger cleaning device and the casing cleaning device are provided on the upstream side and the downstream side of the heat exchanger, but the cleaning fluid to be used or the powder to be cleaned and discharged by the cleaning fluid Depending on the physical properties of the dust and the like, each cleaning device may be provided on either the upstream side or the downstream side of the heat exchanger.
[0034]
The heat exchanger 37 is not limited to the direct expansion type. For example, instead of the outdoor unit 13, a heat source device such as a heat source device or a heat storage tank is provided, and cold / hot water or brine circulated and supplied from the heat source device is used as a heat medium. And may be used for heat exchange with air-conditioning air.
[0035]
Further, instead of the electromagnetic valves 46 and 47, a control valve whose opening degree can be adjusted is used, the cleaning fluid supply device is controlled to clean the heat exchanger 37 for a predetermined time, and then the heat exchanger cleaning control valve is gradually changed. The casing cleaning control valve may be gradually opened simultaneously with the closing, or the control output of the cleaning fluid pump 18 may be variably controlled. This makes it possible to appropriately adjust the cleaning time and cleaning water pressure of the heat exchanger and the inner surface of the casing, thereby enabling more effective cleaning.
[0036]
【The invention's effect】
As described above, according to the present invention, it is possible to provide a cleaning system and a cleaning method for an air conditioner that automatically cleans powder adhering to the inside of a casing or a heat exchanger. Further, it is possible to provide a cleaning system and a cleaning method for an air conditioner that can suppress the amount of cleaning fluid used, the amount of energy consumed during cleaning, and the equipment scale, and are excellent in cleaning efficiency.
[Brief description of the drawings]
FIG. 1 is a configuration explanatory view showing an embodiment of an air conditioner cleaning system according to the present invention.
FIG. 2 is a side configuration explanatory view showing an example of an internal automatic cleaning air conditioner according to the present invention.
FIG. 3 is a top view illustrating the internal automatic cleaning air conditioner according to the present invention.
FIG. 4 is a characteristic diagram showing an example of the operation of each part in the internal automatic cleaning air conditioner according to the present invention.
[Explanation of symbols]
11 ₁ , 11 ₂ , 11 ₃ Air conditioner 13 Outdoor unit 16 Air-conditioning target room 18 Cleaning fluid pump 19 Cleaning fluid tank 23 Drying outdoor air fan 24 Drying exhaust fan 25 Control device 31 Casing 32 Air inlet opening / closing device 34 Casing cleaning Nozzle 35 Heat exchanger cleaning nozzle 37 Heat exchanger 39 Casing cleaning nozzle 40 Heat exchanger cleaning nozzle 42 Air outlet opening / closing device 43 Blower 48 Drying fluid inlet 49 Drying fluid outlet

Claims (7)

An air conditioner cleaning system for automatically cleaning an air conditioner provided in a casing with a heat exchanger that allows air to pass through, at least,
Washing for injecting cleaning fluid for cleaning the upstream and distributed injected to the inner surface of the casing of the heat exchanger upstream and heat exchanger downstream of the cleaning fluid from the lower stream side of the heat exchanger in a radial A casing cleaning device using a nozzle ;
Intensively jetting the washing fluid so as to face the upstream side and lower stream side of the heat exchanger toward the cleaning fluid to the heat exchanger linearly jetting cleaning the heat exchanger at a high pressure A heat exchanger cleaning device using a cleaning nozzle ;
A cleaning fluid supply device for supplying cleaning fluid to the casing cleaning device and heat exchanger cleaning apparatus,
And a drying device for drying the casing inner surface and the heat exchanger by passing a drying fluid through a drying fluid inlet / outlet portion provided in the casing on the upstream side of the heat exchanger and the casing on the downstream side of the heat exchanger. Air conditioning machine cleaning system. Further comprising a control device for controlling the operation of the air conditioner, the control device as an operation mode during air conditioner operation,
The air conditioning operation mode in which the cleaning fluid and the drying fluid are not supplied to the air conditioner and the conditioned air generated through the heat exchanger is supplied to the air conditioned room,
A cleaning operation mode in which the cleaning fluid supply device supplies cleaning fluid to the air conditioner to clean the heat exchanger and the casing inner surface,
2. The air conditioner cleaning system according to claim 1, wherein one of a drying operation mode in which a drying fluid is supplied to the air conditioner to dry the inside of the air conditioner is executed. 3. In the cleaning operation mode, the control device controls the cleaning fluid supply device so that the cleaning fluid is supplied only to either the heat exchanger cleaning device or the casing cleaning device, and performs cleaning for a predetermined time. 3. The cleaning system for an air conditioner according to claim 2 , wherein the cleaning fluid supply device is controlled to perform cleaning so that the cleaning fluid is supplied only to the other cleaning device. 2. An air inlet / outlet opening / closing device that is controlled to prevent the cleaning fluid from leaking into the air conditioning air flow path outside the air conditioner when the cleaning fluid is jetted. The cleaning system for an air conditioner according to any one of claims 3 to 4. As a heat exchanger cleaning apparatus, any one of claims 1 to 4 injection surface of the heat exchanger of the cleaning fluid which comprises using the nozzles for a plurality of heat exchanger washed as not to overlap 1 The cleaning system for an air conditioner described in the section The air conditioner cleaning system according to any one of claims 1 to 5 , wherein a drain pan having a deep bottom surface inclined toward the cleaning fluid discharge port is provided at the bottom of the air conditioner. A cleaning method of an air conditioner for a heat exchanger for passing air to automatically clean the air conditioner provided in the casing, washed so as to face the upstream side and lower stream side of the heat exchanger A heat exchanger cleaning apparatus using a cleaning nozzle that intensively injects a cleaning fluid at a high pressure to inject the cleaning fluid linearly toward the heat exchanger and clean the heat exchanger, and an upstream side of the heat exchanger. good beauty casing cleaning apparatus using a cleaning nozzle for injecting radially a cleaning fluid distributed manner injection to cleaning fluid for cleaning the casing inner surface of the heat exchanger upstream and heat exchanger downstream from the lower stream side A cleaning method for an air conditioner, wherein the cleaning is performed for a predetermined time using any one of the cleaning apparatuses, and then the other cleaning apparatus is used for cleaning.

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