JP2673681B2 - Cleaning device for heat exchanger of ceiling-embedded air conditioner - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for cleaning a heat exchanger of a ceiling-mounted air conditioner.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 16, a hopper Y for covering a casing X (a casing of an air conditioner) from below is attached,
It is known that a washing nozzle W is inserted through an openable and closable opening Z provided in the hopper Y, and the washing nozzle W is manually operated to wash the finned heat exchanger V provided in the housing X. (JP-A-5-1897).

[0003]

However, this is one in which the finned heat exchanger V is cleaned by manually operating the cleaning liquid jet nozzle W from below with respect to the finned heat exchanger V located at a high position. Therefore, it is difficult to wash the finned heat exchanger V while visually checking it, and since it is inevitable to perform the washing operation in an unnatural posture with the arm extended, the finned heat exchanger V is evenly distributed. Difficult to wash. Moreover, since this is one in which the cleaning nozzle W is inserted from the opening Z of the hopper Y provided so that the cleaning liquid is not scattered, the opening Z cannot be completely closed.
There is a problem that it is impossible to prevent the liquid after cleaning from leaking from the opening Z. Therefore, the present applicant has previously while automatically moving the washing liquid jetting nozzle W, and propose a cleaning apparatus for cleaning the heat exchanger by blowing the cleaning liquid toward the heat exchanger with fins (Japanese Patent Application No. 7-143705). However, those previously proposed, so that air conditioning Desho comprises a pan to cover the bottom of the housing of the toner, or subjected to solution after washing attach the adapter to the receiving dish. However, the buried type air conditioner has various sizes and shapes, and the size of the hole in the ceiling in which the buried ceiling type air conditioner is buried is also variable according to the size of the air conditioner. For this reason, in the above-mentioned proposal, a large number of the saucers are prepared according to the holes in the ceiling, or a large number of adapters are provided on the outer periphery of the saucer to match the size of the holes in the portion where the air conditioner is attached. There is a need to. This is costly and always stores a large number of saucers or adapters or transports to a cleaning site
Required to be, there is a problem of equal the effort is very.
An object of the present invention is to provide a cleaning device for a heat exchanger of a ceiling-mounted air conditioner which eliminates such a problem.

[0004]

According to a first aspect of the present invention, there is provided a cleaning device in which a lower part 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 is provided automatically. Fluid ejecting nozzle device in which a supporting plate supports a fluid ejecting nozzle for cleaning the finned heat exchanger by spraying a cleaning liquid toward the finned heat exchanger while projecting outward from the supporting plate. 3 or more with adjustable length
In the binder member provided at the tip of the support arm, wherein the housing together to bind suspended <br/>, the outer periphery of the support plate, water resistant made of resin film and flexible Attached to the cover , and a string passed through a bag-shaped portion provided along the outer periphery of the cover.
Tie the cover to the outer circumference of the housing with
The bottom of the housing is covered with and the length can be adjusted.
The bindings provided at the ends of the three or more supporting arms
Bound and hung on the lower part of the body, on the outer peripheral part of the support board,
Water resistant and flexible made of resin film, etc.
By installing the cover, the size and shape can be embedded in the ceiling.
Can be installed and washed in a stationary air conditioner
You. Moreover, a bag-like shape in which the outer circumference of the cover is provided along this
It is tied up with a string passed through the part, and the housing is composed of the support board and the cover.
By covering the lower part of the body, it is possible to prevent the cleaning liquid from splashing outside.
Can be prevented.

According to a second aspect of the present invention, there is provided a cleaning device in which the fins are automatically moved to a lower portion of a ceiling-mounted air conditioner casing in which a fin-shaped heat exchanger is arranged in a casing whose lower surface is opened. A fluid injection nozzle device, in which a support plate supports a fluid injection nozzle for cleaning the finned heat exchanger by spraying a cleaning liquid toward the attached heat exchanger, is projected outward from the support plate. in binding member provided at the tip of the three or more supporting arms which enables adjusting the length with to bind suspended in the housing, a fluid injection nozzle device with bound suspended in the housing , A waterproof and flexible cover made of a resin film or the like covering the housing from below is provided, and an outer peripheral portion of the cover is provided along the cover.
Tip of a string passed through the bag-like portion and wherein Rukoto strapped to the outer periphery of the housing, three or more supporting arms which is adjustable in length
With the binder provided on the
The outer periphery of the support board has a water resistance made of a resin film or the like.
By installing a flexible and flexible cover,
Attached to ceiling-embedded air conditioners with different shapes
You can wash it. Moreover, the fluid injection nozzle device
Is made of a resin film that covers
Provided with a water-based flexible cover, and provided on the outer periphery of the cover
Tied with a string that passed through the bag-shaped part, below the support board and housing
By covering the cover, it is possible to prevent the cleaning liquid from splashing outside.
I can.

[0006] The cleaning device according to claim 3 is the same as that of claim 1.
And a receiver for receiving a cleaning liquid after cleaning on the outer periphery of the support plate.
Is provided, and after receiving the drain in the receptor
Discharging ensures drainage. Claim 4
A cleaning device according to claim 1, 2 or 3,
A fluid ejection nozzle was provided in the middle of each support arm 4.
A hinge part that can be bent at a right angle is provided on the side and
It is possible to move the cylinder part that surrounds
Equipped with such a configuration.
At the hinge part and the tubular body that surrounds the front and back of the hinge part.
While keeping the arm 4 stable, at the intermediate hinge part
Bending the support arm to the side provided with the fluid ejection nozzle
Support the fluid injection nozzle device when not using the cleaning device.
Can be a leg .

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described with reference to the drawings. In FIG. 1, A denotes a ceiling-mounted air conditioner, and the air conditioner A includes a ring-shaped or substantially ring-shaped finned heat exchanger C as shown in FIG. In addition, a blower D is provided in the center space of the finned heat exchanger C, and a detachable lid member F that is in close contact with the lower surface of the housing B is provided. This lid member F
Has an inlet G at the center and outlets H at four places around the center. J indicates a stay bolt for suspending the housing B on the slab. The present apparatus is for cleaning such a finned heat exchanger C of the air conditioner A. The cleaning is performed after removing the lid member F and the blower D prior to the cleaning.

In FIG. 1 to FIG. 9, 1 is a fin-equipped heat exchanger C by spraying a cleaning liquid from the fluid injection nozzle 2 onto the fin-equipped heat exchanger C while automatically moving toward the fin-equipped heat exchanger C. A fluid ejecting nozzle device for cleaning the above is shown. The fluid ejecting nozzle device 1 is configured by supporting the fluid ejecting nozzle 2 on a support board 3. And the fluid ejection nozzle device 1
Is attached to the case B by a binding tool 4a provided at the tips of the four support arms 4 whose lengths protruding from the support board 3 are adjustable, and is attached to the lower part of the case B. To face. To further explain this, the support board 3 is made of a reinforced resin plate reinforced with carbon fibers, the support arm 4 is made of a relatively light extraction material such as an aluminum material, and each support arm 4 is provided on the support board 3. It is slidably inserted into the tubular body 3a so that the projecting length from the supporting board 3 can be adjusted, and the projecting length is adjusted according to the size of the air conditioner so that each supporting arm 3 is fitted into each tubular body. 3a was fixed by tightening. The support arms 4 are fixed to the cylindrical body 3a with screws 3b after adjusting the protruding length. The tubular body 3a is attached to the support board 3 by attaching a metal annular body 3c to the support board 3 and inserting a screw rod 3d protruding from the tubular body 3a into a mounting hole provided in the annular body 3c. Was tightened and fixed to the annular body 3c with the nut 3f. The binding tool 4a provided at the tip of each support arm 4 is provided with a holding groove 4b for holding the lower part of the housing B, and the holding groove 4b holds the housing B in the holding groove 4b.
After attaching the lower end of each of them, a fastening means 4c such as a screw is used for fastening and binding, and its direction can be freely adjusted via the universal joint 4d at the tip of each support arm 4 of the binding tool 4a. Installed. By thus, intended no flange on the lower end of the housing B can binder clamped 4c by tightening means from the outside, for example, those having a flange directed inwardly to the lower end of the housing B as shown in FIG. 7 The binding tool 4a is rotated 180 degrees, and the binding means 4c is tightened and bound from the inside of the housing B by the fastening means.

Then, a tough, water-resistant and flexible cover 5 made of a resin film such as vinyl chloride is attached to the outer peripheral portion of the lower surface of the support board 2. After being attached to the lower part, the housing 5 was covered with the cover 5 from below. Reference numeral 5c is a discharge pipe provided on the cover 5 for discharging the cleaning liquid. To explain this, a bag-shaped portion for passing the string 5a along the upper end is provided at the upper end of the cover 5, and the cover 5 is bound to the outer periphery of the housing B with the string 5a passed through the bag-shaped part. A hanging hook 5b is provided on the upper end of the cover 5, and the hook 5b is hooked on the stay bolt J so that the cover 5 does not fall off the outer periphery of the housing B.

Each of the support arms 4 is provided with a hinge portion 4d which can be bent at a right angle in the middle thereof, and when the apparatus is placed in the storage place when not in use, as shown in FIG. 12, the hinge portion 4d is provided. When each supporting arm 4 is bent downward with
Is the leg of the fluid ejection nozzle device 1. In addition,
4f indicates that when each of the support arms 3 is used as an original arm,
A cylindrical body that covers the hinge portion 4d and fixes the hinge portion 4d so that the hinge portion 4d is not bent is shown. The cylindrical body 4f is slidably fitted into the support arm 4 and is used as the original support arm. 4f is fixed with a screw 4g so as to straddle the hinge portion 4d. Although the number of the supporting arms 4 is four in the above embodiment, the number of the supporting arms 4 is not limited to four as long as it is three or more.

The fluid ejecting nozzle device 1 is provided with an air blowing nozzle 9 for draining after washing, in addition to the fluid ejecting nozzle 2 on the support board 3. The fluid ejection nozzle 2 is shown in FIG.
As shown in the figure, the one that has seven ejection ports 2a and sprays the cleaning liquid linearly from each ejection port 2a was used, but this has a slit-shaped ejection port, or the ejection port or the cleaning liquid has a spindle shape. It is also possible to use the one that blows out while spreading. However, in order to spray the cleaning liquid vigorously onto the finned heat exchanger C to efficiently clean the fat and the like of the tobacco adhering to the finned heat exchanger C, a fluid of a type that ejects the cleaning liquid linearly with vigor A jet nozzle is desirable.

The fluid ejecting nozzle 2 and the air blowing nozzle 9 are attached to the upper ends of tubular supporting rods 10 and 11 which vertically pass through an opening 3g provided at the center of the supporting board 3, and the fluid ejecting nozzle 2 and the air are ejected. The blowing nozzle 9 is the supporting rod 1.
The cleaning liquid and the pressurized air are respectively ejected from the fluid ejection nozzle 2 and the air blowing nozzle 9 by communicating with the cleaning liquid supply source and the pressure air supply source described later via the pipes in 0 and 11. A lid 3j that covers the opening 3g is provided on the upper surface of the opening 3g of the support board 3.

The fluid ejecting nozzle 2 and the air blowing nozzle 9 are designed to be vertically moved by the driving sources 14 and 15 and to be automatically moved about a vertical axis to perform cleaning and subsequent draining. To explain this, the driving source for rotation 14 includes a pair of upper and lower ball bearings 14a, 14a provided on the lower surface of the support board 3 with a space therebetween, and an outer race 14a-1 of the lower ball bearing 14a.
And a motor 14c provided between the upper and lower ball bearings 14a, 14a supported by the inner race 14a-2 of the lower ball bearing 14a, and meshed with the internal gear 14b. The upper and lower outer races 14a-1 are connected to the support board 3 by three connecting rods 14e, and the upper and lower inner races 14a-2 are connected to each other by a connecting rod 14f. Be linked. The ball bearing 14a had a watertight structure.

The driving source 15 for raising and lowering is a supporting rod 10, 1
1 and a motor 15c for moving the rack rod 15a up and down.
Is the inner race 1 of the lower ball bearing 14a.
4a-2, it is provided between the upper and lower ball bearings 14a, 14a, supported by a support member provided on the upper surface. Support rods 10, 11
The connection between the rack bar 15a and the rack rod 15a is performed via a connecting piece 15a-1.

The fluid ejecting nozzle 2 is pivotally supported by a bracket 16 provided on the upper end of the supporting rod 10 by a shaft 16a so as to be swingable, and is interposed between the bracket 16 and the tip end side of the fluid ejecting nozzle 2. With the coil spring damper 17 supported, the fluid injection nozzle 2 is normally kept horizontal,
When the jet nozzle 2 is moved downward, the projecting piece 18 projecting from the fluid jet nozzle 2 is brought into contact with the stopper 19 projecting from the support member provided on the inner race 14a-2, and the fluid jet nozzle 2 is further lowered in this state. When moving, the fluid injection nozzle 2 is made to swing downward from the horizontal state against the coil spring damper 17. As a result, the lowering position is restricted by the bellows 20 covering the rack rod 15a and the like, and the problem that it is difficult to spray the cleaning liquid to the lower position of the finned heat exchanger C is easily eliminated. The upper end of the support rod 10 and the fluid injection nozzle 2 were connected by a flexible pipe 10a such as a rubber can. In this embodiment, an AC motor is used as the motor 15c.

The motor 14c for rotation in this embodiment
Is controlled by using an optical sensor EX1 provided below the support board 3, and the control of the motor 15c for raising and lowering is performed by the support board 3.
The optical sensor EX2 for detecting the downward movement position of the fluid injection nozzle 2 provided at the lower part of the table and the waterproof type limit switch LMS6 provided at the upper end position of the support rod 10 perform the operation, and the operation is shown in the circuit diagram of FIG. Follow the instructions below. Motor 14c
When the operation switch SW16 provided on the control terminal line 21a connected to the drive control unit 21 is closed, the motor 14c is driven to rotate the fluid ejection nozzle 2 in the arrow direction shown in FIG. When the optical sensor EX1 comes to a position facing the hole 22 formed in the internal gear 14b by the rotation, a signal is obtained from the optical sensor EX1 and the alternate relay 82X is activated by the signal and connected to the drive controller 21. The contact 82x provided on the control terminal line 21b is closed. As a result, the rotation direction of the motor 14c is opposite to the direction of the arrow (hereinafter, referred to as “reversal”). Then, when the fluid ejection nozzle 2 makes one revolution in accordance with the reversal and the optical sensor EX1 comes to the position facing the hole 22 again, a signal is obtained from the optical sensor EX1 and the alternate relay 82X is generated by the signal.
And the control terminal line 2 connected to the drive control unit 21
The contact 82x provided in 1b is opened. Therefore, the motor 1
The rotation direction of 4c changes again and the fluid ejection nozzle 2 is rotated in the arrow direction. SW17 is an alternate relay 82X which is closed when it is desired to change the rotation direction of the fluid ejection nozzle 2 on the way.
Shows the manual switch intervened in. The drive controller 2
The speed of the motor 14c can be adjusted by the speed adjusting unit 21c provided on the No. 1 unit. The fluid ejecting nozzle 2 and the air ejecting nozzle 9 repeatedly move up and down during this rotating operation. The operation is such that when the fluid ejecting nozzle 2 comes to the downward moving position, the optical sensor EX2 makes a hole 23 provided in the rack rod 15a. The signal from the optical sensor EX2, the relay 72 receives the signal.
Energize X. Then, the movable contact 72x1 of the relay 72X for switching the motor 15c is switched to the forward rotation circuit side of the motor 15c, and the self-holding contact 72x2 is closed to self-hold the relay 72X. Therefore, the motor 15c
Rotates in the normal direction, and the rack rod 15a is moved to move the support rods 10 and 11 upward. When the rack rod 15a rises to the upper end position and the limit switch LMS6 is opened, the relay 72X is demagnetized. Therefore, the contact 72x1 is switched to the reverse rotation circuit side of the motor 15c. Therefore, the motor 15c rotates in the reverse direction, causing the rack rod 15a to move the support rods 10, 11 downward. When the projecting piece 18 hits the stopper 19 during the downward movement, the fluid ejection nozzle 2 side is pushed down against the coil spring damper 17. Therefore, the fluid ejection nozzle 2 swings downward from the horizontal state. And the supporting rod 10
The optical sensor EX2, the rack rod 15
It opposes the hole 23 provided in a and again receives a signal from the optical sensor EX2, and the relay 72X is excited by the signal. Therefore, the contact 72x1 is switched to the forward rotation circuit side of the motor 15c, and the self-holding contact contact 72x2 is closed to close the relay 7
Let 2X hold itself. Therefore, the motor 15c rotates forward, moves the rack rod 15a, and moves the support rods 10, 11 upward. Then, at the beginning of the upward movement process, the fluid ejection nozzle 2 gradually returns to the horizontal direction from the state inclined downward, and moves upward while maintaining the state after the fluid ejection nozzle 2 returns to the horizontal direction. The heat exchanger C is cleaned by rotating the fluid jet nozzle 2 while repeating this.

A hose fitting for connecting the support rod 10 to a cleaning liquid supply source (not shown) and a hose fitting for connecting the support rod 11 to a pressurized air supply source are provided with simple fittings (not shown). (Not shown) can be easily and quickly performed.

In the embodiment described above, the fluid jet nozzle 2 and the air jet nozzle 9 are connected to the drive sources 14, 1
By means of 5, the washing and the draining after the washing are performed while moving up and down and rotating around the vertical axis. But,
This fluid injection nozzle 2 and the air blowoff nozzle 9 is swung up and down, or, using of the type comprising a spout 2a for ejecting a fluid to spread on spindle, or
Other, as shown in FIG. 15a, b, the upper and lower該噴outlet 2a is provided in the vertical direction of the slit 2b, so as to inject the vertically long cleaning liquid extending fin height direction of the heat exchanger C Finned by the slit 2b In this case, it is possible to perform the washing and the draining after the washing by merely performing the operation by automatically rotating the fluid jet nozzle 2 and the air blowing nozzle 9 about the vertical axis as described above. I can.

The cleaning water is supplied to the fluid injection nozzle 2 by pumping a liquid in a cleaning liquid tank (not shown) loaded on the carriage S by a pump (not shown) and supplying compressed air to the air blowing nozzle 9. Is performed by a compressor (not shown) loaded on the truck S, and the control of the pump (not shown) and the compressor, and the control of the driving sources 14 and 15 are performed by the control device T loaded on the truck S. This is not particularly different from the conventional method.

Incidentally, FIG. 13 shows another embodiment, in which an inverted triangular pyramid-shaped cover 6 for covering the fluid ejecting nozzle device 1 together with the casing B from below is provided, and the cleaning liquid is covered by the cover 6. The cover 6 is received so that it does not scatter to the outside.
The cleaning liquid received in the step is discharged from the discharge port 6c provided in the cover 6. At the upper end of the cover 6, similarly to the above-described embodiment, a bag-like portion through which the string 6a passes is provided, and the cover 6 is tied to the outer periphery of the housing B with the string 6a passing through the bag-like portion. A hanging hook 6b was provided at the upper end of the cover 6, and the hook 6b was hooked on the stay bolt J to prevent the cover 6 from falling off the outer periphery of the housing B. Other configurations are the same as those of the above embodiment.

FIG. 14 shows still another embodiment, in which a receptacle 7 for receiving the liquid after cleaning is provided on the outer periphery of the support board 3.
After receiving the liquid after washing in the receiver 7, the liquid is discharged from the outlet 7a provided in the receiver 7 to the outside. To explain this, the receiver 7 is made of the same material as the support plate 3 and is integrally provided on the support plate 3 so as to surround the support plate 3. Then, a tough, water-resistant and flexible cover 8 made of a resin film or the like covering the outer circumference of the housing B was attached to the outer circumference of the receiver 7. At the upper end of the cover 8, similarly to the above-described embodiment, a bag-like portion through which the string 8 a passes is provided, and the cover 8 is tied to the outer periphery of the housing B with the string 8 a passing through the bag-like portion. A hanging hook 8b was provided at the upper end of the cover 8, and the hook 8b was hooked on the stay bolt J to prevent the cover 8 from falling off the outer periphery of the housing B. In addition, 8c is received
The discharge pipe of the cleaning liquid provided in the container 7 is shown. Other configurations are the same as those of the above embodiment.

[0022]

The cleaning device according to the first and second aspects of the present invention has the following effects.
When doing so, use three or more support arms with adjustable length.
Use the binder provided on the tip to hang the binder on the bottom of the housing.
And the outer periphery of the support board is made of a resin film, etc.
A water-based and flexible cover is attached, and
Is a tree that covers the fluid ejection nozzle device from below together with the housing.
Outer edge of water-resistant and flexible cover made of oil film, etc.
The cover is attached to the outer circumference of the housing with a string passed through a bag-shaped part
Ceiling-embedded air that is different in size and shape due to being tied up
Install this fluid injection nozzle device on the conditioner.
Can be. Water resistance consisting of resin film etc. and
Attach a flexible cover and install it on the outer edge of the cover.
Tie the cover to the outer circumference of the case with a string passed through the bag-shaped part
By opening, there is no gap between the cover and the housing,
The cleaning liquid will not be scattered around. Claim 3 of the present application
When the cleaning device described in claim 1 is used,
A container for receiving the cleaning liquid after cleaning is installed on the outer periphery of the holding plate.
With, it is easy to collect drainage, and drainage is easier and more reliable.
Can be discharged to. According to the cleaning device according to claim 4 of the present application
At this time, install a fluid injection nozzle in the middle of each support arm.
In addition to providing a hinge part that can be bent at a right angle on the beam side,
Move the hinge and the cylindrical body that surrounds the front and rear of the hinge to the support arm
It is installed so that it can be installed when not in use.
When placing the table on the floor, use the supporting arm as a leg,
It can be placed on the floor in a stable condition.

[Brief description of the drawings]

FIG. 1 is a perspective view of an air conditioner.

Fig. 2 Slope view of finned heat exchanger

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

FIG. 4 is an enlarged sectional side view of FIG. 3;

FIG. 5 is a plan view of FIG. 4;

FIG. 6 is an enlarged view of a supporting arm portion.

FIG. 7 is an enlarged view of a state in which the binding tool is rotated with respect to the support arm.

FIG. 8 is an enlarged side view of the nozzle section.

9 is a side view of the nozzle portion of FIG. 7 viewed from the opposite side.

FIG. 10 is a front view of the nozzle.

FIG. 11 is a circuit diagram of a motor drive unit.

FIG. 12 is a view showing a state when not in use

FIG. 13 is a side view showing another embodiment.

FIG. 14 is a side view showing still another embodiment.

FIG. 15 is a front view showing a modified example of the nozzle.

FIG. 16 is an explanatory diagram showing a conventional example.

[Explanation of Codes] 1 fluid ejection nozzle device 2 fluid ejection nozzle 3 support board 4 support arm
5 cover 6 cover 7 receiving container
8 covers

Claims (4)

(57) [Claims] 1. A lower part 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 moves toward the heat exchanger with fins while automatically moving. Supporting three or more fluid ejecting nozzle devices in which a fluid ejecting nozzle for spraying a cleaning liquid to clean a heat exchanger with fins is supported on a supporting disc and the length of the fluid ejecting nozzle device protruding outward from the supporting disc can be adjusted. in binding member provided at the tip of the arm, said housing
The lower end with to bind lifting of the outer peripheral portion of the support plate
The, water resistant made of resin film and attaching a cover having a flexible, bag-like provided on the outer edge of the cover
The cover is tied to the outer periphery of the housing with a string passed through the
A cleaning device for a heat exchanger of a ceiling-embedded air conditioner, characterized in that a lower part of the housing is covered with a holding board and a cover . 2. A 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 open, while moving automatically toward the heat exchanger with fins. Supporting three or more fluid ejecting nozzle devices in which a fluid ejecting nozzle for spraying a cleaning liquid to clean a heat exchanger with fins is supported on a supporting disc and the length of the fluid ejecting nozzle device protruding outward from the supporting disc can be adjusted. in binding member provided at the tip of the arm, and with to bind suspended in the housing, a fluid injection nozzle device with bound suspended in the housing, a resin film for covering the lower side with the housing Use a water-resistant, flexible cover outside the cover.
With a string passed through a bag-shaped part provided along the circumference,
Cleaning device for heat exchanger of ceiling-embedded air conditioner characterized by binding . 3. The washing machine according to claim 1, wherein the outer periphery of the support board is washed.
It is characterized by having a receptacle for receiving the cleaning liquid after cleaning
Cleaning equipment for heat exchangers of ceiling-embedded air conditioners . 4. The method of claim 1, 2 or 3, wherein each support arm 4, together with a right angle providing the foldable hinge portion on the side provided with the fluid jet nozzles in the middle, with the hinge portion thereof A cleaning device for a heat exchanger of a ceiling-embedded air conditioner, characterized in that a cylindrical body that flexes around the front and rear is movably attached to the support arm 4.