JPH09210593A - Automatic cleaning equipment for heat exchanger of ceiling fitted type air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide equipment for executing automatic cleaning of a heat exchanger of a ceiling fitted type air conditioner efficiently by a small number of floor set parts. SOLUTION: This equipment has a cover 2 covering the lower part of a case body B of an air conditioner of a ceiling fitted type, a ceiling installed part 4 equipped with a liquid spray nozzle 3a spraying a cleaning liquid and other liquids onto a heat exchanger C with fins and an air jet nozzle 3b jetting air for removal of the liquids and a floor set part 8 having a carriage X carrying a liquid supplying-collecting device 5 and a carriage Y carrying an air supplying device 6 in such a manner that one carriage X can be set or fitted on the other carriage Y. The liquid spray nozzle 3a and a drain collecting port 2d provided in the cover 2 are connected to the liquid supplying-collecting device 5 through removable hoses 9 and 10, while the air jet nozzle 3b and the air supply device 6 are connected through a removable hose 11.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to an office, a playground,
The present invention relates to an automatic cleaning device for a heat exchanger of a ceiling-mounted air conditioner installed on a ceiling such as a tea room.

[0002]

2. Description of the Related Art The applicant of the present application has previously proposed that a cover for covering the lower part of the housing of a ceiling-mounted air conditioner in which a heat exchanger with fins is arranged in a substantially annular shape in a housing whose lower surface is opened, and a vertical movement. Also, a ceiling installation part including a liquid injection nozzle for spraying a cleaning liquid or other liquid toward the finned heat exchanger while rotating about a vertical axis and an air injection nozzle for spraying air, and a liquid. A floor-standing equipment equipped with a liquid supply / recovery device for supplying the cleaning liquid and other liquids to the injection nozzle and for collecting the cleaning liquid and other liquids collected on the cover, and an air supply device for supplying air to the air injection nozzles on the carriage. And a cleaning operation or other operation while supplying the cleaning liquid or other liquid from the liquid supply / recovery device to the liquid injection nozzle while recovering the drain collected on the cover to the liquid supply / recovery device and the air. A cleaning device for a heat exchanger has been proposed in which air is supplied from an air supply device to an air injection nozzle and air is blown to a finned heat exchanger to automatically perform draining work (Patent Application No. 143705).

[0003]

In order to efficiently clean each finned heat exchanger in which a plurality of air conditioners are installed using this heat exchanger cleaning device,
It is necessary to bring in each ceiling installation part and a corresponding number of floor installation parts to perform work. However, equipment such as desks is installed on the floor of the room where the ceiling-mounted air conditioner is installed, and it is difficult to bring in multiple large floor units equipped with compressors, high-pressure motors, liquid tanks, etc. Not
The floor rest is heavy and inconvenient to carry. Therefore, it is desired to compact the floor rests and effectively utilize the few floor rests so that the heat exchanger can be cleaned. It is an object of the present invention to provide an automatic cleaning device for a heat exchanger with fins that satisfies such a demand.

[0004]

According to a first aspect of the present invention, there is provided a housing of a ceiling-mounted air conditioner in which a heat exchanger with fins is arranged in a substantially annular shape in a housing whose lower surface is opened. A cover for covering the lower part, a liquid spray nozzle for spraying a cleaning liquid and other liquids toward the heat exchanger with fins and air for spraying liquid above the cover while being vertically moved and rotated about a vertical axis. A carriage provided with a ceiling installation part having an air injection nozzle, a liquid supply / recovery device for supplying the cleaning liquid and other liquids to the liquid injection nozzle, and collecting the cleaning liquid and other liquids collected on the cover, and an air injection nozzle A trolley equipped with an air supply device for supplying air to one of the trolleys, and a floor mount part in which the other trolley can be mounted and mounted freely on one trolley, and the liquid injection nozzle and the drain recovery port provided on the cover are provided. Removable The liquid supply / recovery device is connected via a hose, and the air injection nozzle and the air supply device are connected via a detachable hose. While carrying out the liquid draining work by air to the finned heat exchanger that has been cleaned by spraying the cleaning liquid and other liquids from the liquid jet nozzle first while carrying the devices to different positions,
A liquid injection nozzle attached to another finned heat exchanger and a drain recovery port provided on the cover can be connected to a liquid supply / recovery device via a hose to perform cleaning and other operations.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described with reference to the drawings. In FIG. 1, A indicates a ceiling-mounted air conditioner, and the air conditioner A is provided with a fin-shaped heat exchanger C which is annular or substantially annular as shown in FIG. Further, a blower D is provided in the central space of the finned heat exchanger C, and the housing B
And a detachable lid member F that comes into close contact with the packing E (shown in FIG. 3) on the lower surface of the. The lid member F has an intake port G at the center and outlet ports H at four locations around the lid. Incidentally, J is the case B
Shows a stay bolt that hangs a ceiling slab. The cleaning device is for cleaning the finned heat exchanger C of the air conditioner A and the inner surface of the housing B. The cleaning is performed after removing the lid member F and the blower D prior to the cleaning.

This cleaning device is based on the air conditioner A described above.
The cover 2 covering the lower part of the housing B and the cleaning liquid and other components are automatically moved toward the finned heat exchanger C above the cover 2 while being vertically moved by the drive device 7 and rotated about a vertical axis. Liquid jet nozzle 3a for jetting liquid and air jet nozzle 3 for automatically jetting air for draining liquid
b, a trolley X equipped with a ceiling installation part 4 including b, a liquid supply / recovery device 5 for supplying a cleaning liquid or other liquid to the liquid injection nozzle 3a and collecting the cleaning liquid or other liquid on the cover 2, and an air injection nozzle 3b. A carriage Y on which an air supply device 6 for supplying air is mounted, and a floor mount 8 on which one carriage Y and the other carriage X can be mounted and assembled freely.
And a drain recovery port 2d provided in the cover 2 are connected to the liquid supply / recovery device 5 via removable hoses 9 and 10, and the air injection nozzle 3b and the air supply device 6 are connected via a removable hose 11. This will be described. The cover 2 is a plate material such as a synthetic resin as shown in FIG. 3, and the drive device 7 and the liquid that is vertically moved by the drive device 7 and rotates about a vertical line. Injection nozzle 3
The central portion 2A supporting the a and the air jet nozzle 3b, and the outer peripheral portion 2B removably attached to the central portion 2A are configured as a whole as a dish. To further explain this, the central portion 2A of the cover 2 has a through hole 2a in the center, a rising wall 2b that rises upward around the through hole 2a, and covers the through hole 2a from the upper surface. The outer peripheral portion 2B has a circular opening 2e in the center, an overlapping portion 2f partially overlapping the central portion 2A, and a rising wall 2g on the outer periphery. It was The outer peripheral portion 2B has an outer peripheral shape such as a circular shape, an octagonal shape, a modified hexagonal shape, or the like, which corresponds to the cross-sectional shape of the heat exchanger C to be cleaned, and thus the corresponding outer peripheral shape of the housing B. In this configuration, only the outer peripheral portion 2B is replaced according to the shape of the heat exchanger C so that it can be used for cleaning an air conditioner equipped with heat exchangers of various shapes. The central portion 2A and the outer peripheral portion 2B are fixed by tightening with a bolt nut 2j with a packing 2h interposed between the overlapping portions 2g. Further, a support member 12b made of a sealant and a bearing is provided at a portion where the support rods 12 and 13 are inserted into the lid 2c, and a rubber cover 12c is provided on the outer periphery thereof.

The liquid jet nozzle 3a has the through hole 2a.
The air injection nozzle 3 is provided on the upper part of the support rod 12 (shown in FIG. 3) which is exposed from below the cover 2 to the upper part of the cover 2.
Similarly, in b, through the through hole 2a of the cover 2, on the upper part of the support rod 13 which is exposed from below the cover 2 to the upper part of the cover 2,
Each of the supporting rods 12 and 13 is made of aluminum or another metal pipe so that the cleaning liquid and the air can be blown toward the finned heat exchanger C from the two injection nozzles 3a and 3b. Was used as a fluid passage for liquid and air. It should be noted that the liquid ejecting nozzle 3a is configured by
As shown in FIG. 3, a nozzle body 3a-1 having the liquid jet nozzle 3a attached at its tip is pivotally supported by a bracket 12a provided on an upper portion of a support rod 12 up and down by a shaft 14, and the nozzle body 3a is -1 is mounted on the coil spring damper 15 on the mounting side of the liquid jet nozzle 3a to normally maintain the nozzle body 3a-1 and the jet nozzle 3a at the tip thereof in a horizontal state, and when the nozzle body 3a-1 moves downward, the nozzle body 3a- 1
When the protruding bar 16 protruding downward from the other end of the coil abuts against the upper surface of the metal plate 19 and further moves downward, the coil spring damper 1
The rear end of the liquid jet nozzle 3a is pushed up against 5
The liquid jet nozzle 3a is configured to swing downward from the horizontal state. As a result, the downward movement of the liquid jet nozzle 3a is restricted by the bellows 18 that covers the rack rod 23a that forms part of the drive device 7 described later, and it is difficult to spray the cleaning liquid to the lower position of the heat exchanger C. Resolved. The projecting rod 16 has an adjusting screw 16a screwed to the lower end thereof, and is provided with the support rods 12 and 13 and the rack rod 23.
The connecting piece 24 for connecting with a is vertically penetrated, and is connected to the nozzle body 3a-1 at the upper end thereof.
4 and the lower surface and the adjusting screw 16a, the projecting bar 16 is biased downward by a coil spring 16b which surrounds and flexes the projecting bar 16. The upper end of the protruding rod 16 is inserted into and connected to a burrow hole provided in the plate piece 3a-1 'protruding from the nozzle body 3a-1 so as to allow the tilt of the nozzle body 3a-1 due to the swing. The swing of the liquid jet nozzle 3a can also be achieved by a means as shown in FIG. Explaining this, the first air cylinder 20a is made to project downward from the connecting piece 24 by being supported by the connecting piece 24,
The second air cylinder 20b is provided by pivotally supporting the lower end of the plate piece 12a 'protruding from the bracket 12a, and the upper end of the piston 20b-1 of the second air cylinder 20b is connected to the nozzle body 3a-1. Hose 21 in which 20a and 20b are provided with a quick exhaust valve 21a
Communication. By doing so, when the liquid jet nozzle 3a moves downward and the lower end of the piston 20a-1 of the first air cylinder 20a further abuts against the metal plate 19, the piston 20a-1 is pushed up and the air piston cylinder The air in 20a is compressed. This air pressure pushes up the piston 20b-1 of the second air piston cylinder 20b, which causes the liquid jet nozzle 3a to swing downward from the horizontal state. Then, by operating the quick exhaust valve 21a at the lowermost position, the second exhaust valve 21a
By releasing the air in the air piston cylinder 20b,
The liquid jet nozzle 3a is pushed back by the coil spring damper 15 to return to the horizontal position, and thereafter the piston 20a-1 of the first air piston cylinder 20a is repelled downward by the spring 20a-2, so that the first air piston cylinder 20a. The inside is filled with air.

The drive unit 7 includes the jet nozzle 3a,
It is composed of a drive unit 22 for rotating 3b about a vertical axis and a drive unit 23 for vertically moving the injection nozzles 3a, 3b.
The drive unit 22 for rotation includes a pair of upper and lower ball bearing rings 22a, 22a provided on the lower surface of the cover 2 with a space therebetween.
And the outer race 2 of the lower ball bearing 22a
An internal gear 22b attached to the lower surface of 2a-1, a motor 22c provided between the upper and lower ball bearings 22a, 22a supported by the inner race 22a-2 of the lower ball bearing 22a, and the internal gear 22b. The motor 2 that meshes with
2 c on the rotating shaft of 2c, the upper and lower outer races 22a-1 are connected to the cover 2 by three connecting rods 22e, and the upper and lower inner races 22a-2 are connected to the connecting rod 22.
They are connected to each other at f. The ball bearing 22a has a watertight structure.

The drive unit 23 for lifting and lowering is provided with support rods 12, 1.
3, a rack rod 23a connected to 3 and a motor 23b for moving the rack rod 23a up and down. The motor 23b is used for the inner race 22 of the lower ball bearing ring 22a.
It was provided between the upper and lower ball bearings 22a, 22a while being supported by a supporting member provided on a-2. Also, the support rod 1
A metal plate 19 is attached to the portion where the lid rods 2a and 2 and 13 and the rack rod 23a are inserted, and the resin plate constituting the lid 2c is reinforced with the metal plate 19.

The rotation motor 22c is controlled by the cover 2
The optical sensor EX1 for detecting the rotational position provided at the bottom of the cover 2 controls the motor 23b for raising and lowering.
The optical sensor EX2 for detecting the downward movement position of the injection nozzle 3a provided in the lower part of the table and the waterproof type limit switch LMS provided at the upper end position of the support rod 12 perform the operation.
The description will be made according to the circuit diagram shown in FIG. When the operation switch SW1 provided on the control terminal line 24a connected to the control board 24 of the motor 22c is closed, the motor 22c is driven to rotate the liquid jet nozzle 3a in the arrow direction shown in FIG. The rotation causes the optical sensor EX1 to make a hole 2 in the internal gear 22b.
When it comes to the position opposite to 5, a signal is obtained from the optical sensor EX1, and the alternate relay 82X is activated by the signal, and the control board 2
The contact 82 provided on the control terminal line 24b connected to No. 4
Close x. As a result, the rotation direction of the motor 22c is opposite to the arrow direction (hereinafter referred to as "reversal"). Then, as the liquid ejection nozzle 3a makes one revolution with the reversal, the optical sensor E
When X1 comes to a position facing the hole 26 provided in the rack rod 23a, a signal is obtained from the optical sensor EX1 and the alternate relay 82X is actuated by the signal, and the control terminal line 22b connected to the drive unit 22 is provided. Open the contact 82x. Therefore, the rotation direction of the motor 22c is changed again to rotate the liquid jet nozzle 3a in the direction of the arrow shown in FIG. The jet nozzles 3a and 3b are repeatedly moved up and down during this rotation operation.
The operation is such that when the liquid jet nozzle 3a comes to the down position and the optical sensor EX2 faces the hole 26 provided in the rack rod 23a, a signal is obtained from the optical sensor EX2 and the relay 7 receives the signal.
Energize 2X. Then, the movable contact 72x1 of the relay 72X for switching the motor 23b is switched to the forward rotation circuit side of the motor 23b, and the self-holding contact 72x2 is closed to self-hold the relay 72X. Therefore, the motor 23
b is rotated in the normal direction, and the rack rod 23a is moved to move the support rods 12 and 13 upward. The rack rod 23a rises to the upper end position,
When the limit switch LMS is opened, the relay 72X is demagnetized. Therefore, the contact 72x1 is switched to the reverse rotation circuit side of the motor 23b, and the motor 23b is reversely rotated, and the rack rod 23a is rotated.
Then, the support rods 12 and 13 are moved downward. And 16
When the metal plate 19 hits the metal plate 19, the liquid jet nozzle 3a side is pushed down against the coil spring damper 15. Therefore, the liquid jet nozzle 3a swings downward from the horizontal state. When the support rod 12 reaches the lower position, the optical sensor EX2 faces the hole 26 provided in the rack rod 23a, and a signal is again obtained from the optical sensor EX2 to excite the relay 72X. Therefore, the contact 72x2 is switched to the normal circuit side of the motor 23b, and the self-holding contact 72x2 is closed to self-hold the relay 72X. Therefore, the motor 23b rotates in the normal direction, and the rack rod 23a is moved to move the support rods 12 and 13 upward. At the beginning of this upward movement process, the liquid jet nozzle 3a gradually returns to the horizontal direction from the state of being tilted downward, and after the liquid jet nozzle 3a returns to the horizontal direction, the liquid jet nozzle 3a moves upward while maintaining this state. While repeating this, the liquid jet nozzle 3a rotates to perform a series of cleaning on the heat exchanger C. As the motor 22c, a speed change motor 22c whose speed can be adjusted by a speed adjusting unit 24c provided on the control board 24 is used.
When jetting from a, the speed adjusting section 24c rotates the nozzle 3a at a high speed such that the nozzle 3a makes one rotation in 30 seconds, and when tap water is jetted from the nozzle 3a and when air is jetted from the air jet nozzle 3a. When it is allowed to rotate, it is rotated at a slow speed of about once every 14 minutes. In addition, in FIG.
W2 is a manual switch S intervening in the alternate relay 82X which is closed when it is desired to change the rotation direction of the injection nozzle 3a on the way, S
W3 represents a switch interposed in the operating circuit of the motor 23b. When the switch SW3 is opened, the motor 23b can be stopped and the nozzles 3a and 3b can be stopped at a predetermined height position.

The cover 2 is attached by being closely attached to the lower surface of the housing B by the installation means 1.
Is a cord-like body 1a attached to at least two places on the left and right of the cover 2, and a hook 1b attached to each cord-like body 1a.
And a tightening fixture 1c for inserting and fixing the free end of each string-like body 1a fixed to the cover 2. To further explain this, each string-shaped body 1a is composed of a flat and tough band-shaped body, and the fastening fixtures 1c are attached to the mounting tools 1d attached to the four corners of the lower surface of the cover 2 via the band-shaped body 1e. It was Each fastening fixture 1c includes a pin 1f and a fastening piece 1h which is repelled by a spring 1g on a side that comes into pressure contact with the pin 1f, and has a cord-like shape at an interval between the pin 1f and the fastening piece 1h. The string-like body 1a was fixed to the fastening fixture 1c by inserting the free end of the body 1a. A surface of the fastening fixture 1c facing the pin 1f is provided with a saw blade that allows the movement of the cord 1a in only one direction (fastening direction). In the tightening fixture 1c, the string-shaped body 1a can freely move when the facing surface of the tightening piece 1h is retracted from the pin 1f against the spring 1g. The installation of the cover 2 on the housing B by the installation means 1 is performed by hooking the hook 1b on the stay bolt J and pulling the root of each string-like body 1a inserted into the tightening fixture 1c as shown in FIG. ,
The cover 2 is gradually raised, and the upper surface of the cover 2 is installed in a state in which it is in close contact with a packing E (a packing that abuts the lid member F) provided around the housing B. To solve this, the fastening piece 1h may be switched to the release position.

As described above, the floor-standing unit 8 is equipped with the carriage X on which the liquid supply / recovery device 5 for supplying the cleaning liquid or other liquid to the liquid injection nozzle 3a and collecting the cleaning liquid or other liquid on the cover 2 is mounted and the air jet. As described above, the carriage Y on which the air supply device 6 for supplying air to the nozzles 3b is mounted on one carriage Y and the other carriage X can be mounted on the carriage 3 freely. Explaining this in more detail, the carriage X comprises a rectangular mount X1 on which the liquid supply / recovery device 5 is mounted, and an operating base X2 whose upper surface rising from the right end of the mounting base X1 is an operating panel X3. Legs X1 that are relatively long from the corners on the bottom of the base X1
-1 is provided so that a space for accommodating the air supply device 6 is formed below the table X1. Trolley Y
Is a rectangular mount Y1 on which the air supply device 6 is mounted and the mount Y
1. The operation table Y2 is provided with an operation panel Y3 on the upper surface rising from the left end of 1, and the mounting table Y1 is a rectangular groove for mounting the carriage X around the air supply device 6 when it is mounted on this. Y
Fig. 9 is a diagram in which the 1-1 is provided, and the carriage X is mounted on the carriage Y and mounted.
The state shown in Fig. 10 and the state shown in Figs. 10 and 14 in which the two carriages X and Y are separated can be used properly. The air supply device 6 is composed of an air compressor, and the liquid supply / recovery device 5 includes, as shown in FIG. 11, a recovery tank 5a for recovering drain, a cleaning liquid tank 5b provided on one side of the recovery tank 5a, and a cleaning liquid tank 5b on the other side. A finishing agent tank 5c is provided, and a high-pressure pump 5e is provided below these tanks 5a to 5c to pump the tap water to the liquid jet nozzle 3a. The cleaning liquid tank 5b is divided into three parts, for example, having different concentrations. The cleaning liquid can be stored so that the cleaning liquid can be selectively used depending on how dirty the finned heat exchanger C is, and the finishing agent tank 5c is also divided into three parts, for example, a disinfectant liquid, a deodorant liquid, and a coating liquid (corrosion inhibitor). prepare. Then, when a certain amount of liquid is collected in the recovery tank 5a in the recovery tank 5a, a throw-in pump 5d for guiding the liquid to the outside, for example, a wash basin or the like.
Was provided. Then, the outlet pipes 28 connected to the respective cleaning liquid tanks 5b and the finishing agent tanks 5c are connected to the respective tanks 5b and 5b.
A low-pressure pump 5f for pumping out the liquid in c and a solenoid valve 5g are provided, and each outlet pipe 28 is provided with the high-pressure pump 5 described above.
The discharge pipe 29 connected to the discharge port of e is connected via a joint pipe 30. In addition, 5 h is the outlet pipe 28 of the discharge pipe 29.
A solenoid valve, which is interposed upstream of the connection portion of, is a pressure gauge. Reference numeral 32 denotes an air vent pipe that rises from the inlet of the high-pressure pump 5e and communicates with the recovery tank 5a, and 32a denotes a solenoid valve interposed therebetween. In FIG. 13, 27a, 2
Reference numeral 7b denotes a switch provided on the recovery tank 5a for detecting the liquid level. When the switch 27a is closed, the throw-in pump 5d is operated to send the recovery tank 5a to a water facility such as a washroom, and the switch 27b is operated. When closed, the injection pump 5d is stopped.

Next, the cleaning operation by this apparatus will be described.
To perform the cleaning work with this device, first, the high-pressure pump 5e
The intake port of is connected to the tap through a hose, and the solenoid valve 3
2a is opened, and the air remaining in the hose is removed and placed. After that, the solenoid valve 5g provided on the outlet pipe 28 of any one of the cleaning liquid tanks 5b is opened and the low-pressure pump 5f is operated to spray the cleaning liquid from the nozzle 3a onto the finned heat exchanger C and the inner surface of the housing B. At this time, the solenoid valve 5h is closed. Then, the cleaning liquid is sprayed for about 1 minute, the low-pressure pump 5f is stopped, the electromagnetic valve 5g is closed to end the cleaning liquid spraying work, then the electromagnetic valve 5h is opened and the high-pressure pump 5e is operated to operate the finned heat exchanger C and the casing. The inner surface of the body B is washed by spraying tap water for about 14 minutes. At this time, as described above, the rotation motor 22c has the liquid jet nozzle 3a of
Rotate at a slow speed of about one revolution per minute. afterwards,
The high pressure pump 5e is stopped, the solenoid valve 5h is closed, and the solenoid valve 5
g is opened, and the low-pressure pump 5f provided in the outlet pipe 28 of the finishing agent tank 5c is operated to spray the finishing agent on the finned heat exchanger C and the inner surface of the housing B for about 1 minute. After that, the air supply device 6 is operated to drain the liquid adhering to the heat exchanger C with fins and the inner surface of the housing B from the nozzle 3b for about 14 minutes to complete the work. At this time, the rotation motor 2
As for 2c, as described above, the liquid jet nozzle 3a is rotated at a slow speed of about once every 14 minutes. When the cleaning liquid and the finishing agent are sprayed onto the heat exchanger C with fins and the inner surface of the casing B, the nozzle 3a is not moved up and down.
The cleaning liquid and the finishing agent are sprayed onto the heat exchanger C with fins and the casing B by two operations, that is, once with the upper end position fixed and once with the nozzle 3a fixed at the intermediate position.
This work is performed by using a plurality of ceiling-mounted air conditioners where the heat exchanger C with fins and the casing B are installed.
When carrying out the cleaning work, the carriage X on which the liquid supply / recovery device 5 is mounted and the carriage Y on which the air supply device 6 is mounted are separated, and the ceiling-mounted air that has been cleaned and sprayed with the finishing agent first is separated. While the liquid is drained from the conditioner A, the next ceiling-mounted air conditioner A is washed by the liquid supply / recovery device 5 and sprayed with the finishing agent. By doing so, it is possible to perform efficient cleaning work with a small number of floor placing sections 8 simply by preparing a plurality of relatively small, light and easy-to-carry ceiling installation sections 4.

[0014]

According to the cleaning device for the heat exchanger of the ceiling-mounted air conditioner according to the first aspect of the present invention, one of the bogie having the liquid supply / recovery device and the bogie having the air supply device is provided. Since it can be freely mounted and assembled on the other dolly, when carrying and storing it, if one dolly is placed on the other dolly and assembled, it can be compactly packed and stored and transported easily. , When performing the cleaning work, by using the two carriages in a separated state, the cleaning liquid and other liquids are first sprayed from the liquid injection nozzle to perform the liquid draining work with air on the finned heat exchanger that has been cleaned. While doing so, it is possible to perform work such as cleaning by connecting the liquid injection nozzle attached to another finned heat exchanger and the drain recovery port provided on the cover to the liquid supply / recovery device via a hose. , Multiple ceiling-mounted air conditioners Shona is effectively can be efficiently cleaned by utilizing a few floor portion of the heat exchanger with the fins of the place where it is installed.

[Brief description of drawings]

Fig. 1 Slope view of air conditioner

Fig. 2 Slope view of finned heat exchanger

FIG. 3 is a side view showing an example of an embodiment of the present invention.

FIG. 4 is a plan view of a saucer portion.

FIG. 5 is an enlarged cross-sectional view of the installation means.

FIG. 6 is an enlarged view of a part of FIG.

FIG. 7 is a diagram showing a modification of FIG.

[Fig. 8] Operation circuit diagram

FIG. 9 is a side view of the floor rest part.

FIG. 10 is a side view of a carriage on which a liquid supply / collection device is mounted,
However, the outlet pipe 28, low pressure pump 5f, and solenoid valve 5g are deleted.

FIG. 11 is a plan view of FIG. 10;

12 is a diagram showing AA in FIG.

13 is a sectional view taken along line BB of FIG.

FIG. 14 is a side view of a truck on which an air supply device is mounted.

[Explanation of symbols]

2 cover 3a liquid injection nozzle 3b
Air injection nozzle 4 Ceiling installation part 5 Liquid supply and recovery device 6
Air supply device 8 Floor rest 9 Hose 10
Hose 11 hose

Claims (1)

[Claims] 1. A cover for covering a lower portion of a housing of a ceiling-mounted air conditioner in which a heat exchanger with fins is arranged in a substantially annular shape in a housing whose lower surface is opened, and vertical movement and rotation about a vertical axis. At the same time, above the cover, a ceiling installation unit including a liquid jet nozzle that blows a cleaning liquid and other liquid toward the heat exchanger with fins, and an air jet nozzle that blows air to drain the liquid, and the liquid jet nozzle. One of the trolley is equipped with a liquid supply / recovery device for supplying the cleaning liquid or other liquid and the recovery of the cleaning liquid or other liquid collected on the cover, and the trolley with the air supply device for supplying air to the air injection nozzle. The trolley is provided with a floor mount part in which the other trolley is freely mounted and mounted, and the liquid injection nozzle and the drain recovery port provided in the cover are connected to the liquid supply / recovery device via a removable hose, An automatic cleaning device for a heat exchanger of a ceiling-mounted air conditioner, characterized in that an air injection nozzle and an air supply device are connected via a removable hose.