JP6421106B2 - Cleaning device for heat exchanger of ceiling-mounted air conditioner - Google Patents

Description

  The present invention relates to a heat exchanger cleaning device for a ceiling-buried air conditioner.

  Conventionally, as a method of cleaning a ceiling-buried type air conditioner, as shown in FIG. 13, a hopper Y covering from below is attached to a housing X (air conditioner casing), and an openable / closable opening Z provided in the hopper Y. There is known a method of cleaning the finned heat exchanger V provided in the housing X by inserting the cleaning nozzle W from above and manually operating the cleaning nozzle W (see, for example, Patent Document 1).

  However, this method cleans the finned heat exchanger V while operating the cleaning liquid jet nozzle W manually from below with respect to the finned heat exchanger V. It is difficult to clean while checking with the eyes, and it is difficult to clean the finned heat exchanger V evenly because the cleaning operation is unnatural with the arms extended. Moreover, since this method inserts the cleaning nozzle W from the opening Z of the hopper Y provided so that the cleaning liquid does not scatter, the opening Z cannot be completely closed, and the waste liquid after cleaning from the opening Z There are problems such as leakage.

  Accordingly, the applicant of the present application has previously proposed a cleaning device that cleans the heat exchanger by spraying the cleaning liquid toward the finned heat exchanger while automatically moving the cleaning liquid ejection nozzle W (Patent Document 2). reference). In the proposal of Patent Document 2, a box-shaped receiving tray that covers the lower portion of the housing of the ceiling-embedded air conditioner, has an upper surface opened, and has a drain outlet at the lower portion is received and discharged after receiving the waste liquid after washing. Like to do.

  On the other hand, in the ceiling-embedded air conditioner, the size and shape of the finned heat exchanger to be cleaned vary depending on the manufacturer and model, and the size and shape of the casing covering the same are also varied.

  Therefore, in the cleaning apparatus of Patent Document 2, it is necessary to prepare and store a plurality of trays according to the size and shape of the finned heat exchanger of the ceiling-embedded air conditioner to be cleaned, that is, the size and shape of the casing. However, it is necessary to confirm the manufacturer and model of the ceiling-buried air conditioner to be cleaned, and to transport the matching tray to the cleaning site, which is cumbersome and there is room for improvement. It was.

  Therefore, the present applicant attaches a water-resistant and flexible cover made of a resin film or the like to the outer periphery of the cleaning device, and attaches the fluid jet nozzle device to the ceiling-embedded air conditioner housing from below with the cover. We proposed a cleaning device that cleans the heat exchanger that prevents the cleaning liquid from splashing outside the ceiling-embedded air conditioner with different casing sizes and shapes by covering (see Patent Document 3).

  This proposal is excellent in that the fluid ejection nozzle device can be attached to a ceiling-buried air conditioner having a different size and shape of the casing.

JP-A-5-1897 Japanese Patent Application No. 7-143705 Japanese Patent Laid-Open No. 9-113185

  However, in the proposal of Patent Document 3, it takes time to attach the flexible cover, there is a risk that the waste liquid may leak if the attachment is incomplete, and maintenance of the cover after cleaning is not possible. There is still room for improvement in terms of complexity.

  The present invention has been made in view of the above-described conventional situation, and the size and shape of the housing are different even in a heat exchanger cleaning device for a ceiling-embedded air conditioner having a box-shaped tray. It is an object of the present invention to provide a heat exchanger cleaning device for a ceiling-buried air conditioner that can be attached to the ceiling-buried air conditioner.

  That is, the cleaning device for a heat exchanger of a ceiling-buried air conditioner according to the present invention is characterized by the following.

1stly, the saucer made to stick to the lower part of the housing | casing of a ceiling-embedded type air conditioner which has arrange | positioned the substantially annular finned heat exchanger in the housing | casing which open | released the lower surface, and the said saucer is stuck and fixed to the lower end of the said housing | casing A cleaning device for a heat exchanger of a ceiling-buried air conditioner, comprising a mounting member for causing the fluid to be moved up and down by a drive device and a fluid injection nozzle device fixed to the tray that rotates about a vertical axis, Is formed in a box shape with an open top, a saucer bottom, a through hole provided in the center of the saucer bottom, a device mounting portion that rises upward from the edge of the through hole, and an upper side from the outer periphery of the saucer bottom A casing having a certain width from the upper part of the outer peripheral wall only to the inside so that the outer peripheral wall rises in contact with the lower part of the casing of the finned heat exchanger of various sizes and shapes. This And a discharge port for discharging the waste liquid of the cleaning liquid at the bottom of the tray, and the fluid ejection nozzle device is fixed to the device mounting portion, and the housing abutting portion is The lower part of the housing is closely attached and fixed.

  Second, in the heat exchanger cleaning apparatus for a ceiling-buried air conditioner according to the first aspect of the present invention, cushioning is provided on a surface having a certain width to which the lower portion of the casing closely contacts the casing abutting portion. It is preferable that the member to have is provided.

  Third, in the heat exchanger cleaning apparatus for a ceiling-embedded air conditioner according to the first or second aspect of the invention, a rising portion is provided that rises further upward than the housing contact portion of the outer peripheral wall, and the rising The part is preferably formed of a flexible material.

Fourth, in the heat exchanger cleaning apparatus for a ceiling-embedded air conditioner according to any one of the first to third inventions, the installation member is a string-shaped body and a stay bolt provided at one end of the string-shaped body A hook for hanging from the hook, a fastening fixture for inserting and fixing the free end of the string-like body, and a fixture provided at a lower portion of the fluid ejection nozzle device provided at one end of the fastening fixture. It is preferable that a binding tool capable of binding is provided.
Fifth, in the heat exchanger cleaning apparatus for a ceiling-embedded air conditioner according to any one of the first to fourth inventions, the corner portion provided with the connection portion of the refrigerant pipe of the finned heat exchanger is contacted with the corner portion. It is preferable that the width of the corner portion of the housing contact portion is set wider than the width of other corner portions.

  According to the ceiling-buried air conditioner heat exchanger cleaning device of the present invention, even if the ceiling-buried air conditioner heat exchanger cleaning device includes a box-shaped tray, the size and shape of the housing is It is possible to provide a cleaning device for a heat exchanger of a ceiling-buried air conditioner that can be attached to different ceiling-buried air conditioners.

  In addition, the cleaning device can be easily installed and removed from the ceiling-embedded air conditioner, and the adhesion between the tray and the lower portion of the housing can be improved to prevent the cleaning liquid from splashing outside.

It is a perspective view which shows the structure of a general air conditioner. It is a perspective view of a common fin heat exchanger. It is a schematic side view which shows the state which attached the washing | cleaning apparatus of this invention to the ceiling-buried type air conditioner. It is a perspective view of a saucer. It is side surface sectional drawing of a clamping fixture part. FIG. 4 is a side sectional view of the embodiment of FIG. 3. It is an enlarged side view of a nozzle part. It is the side view which looked at the nozzle part of FIG. 7 from the opposite side. It is a front view of a nozzle. It is a circuit diagram of a motor drive part. It is the schematic explaining rotation operation | movement of a fluid injection nozzle. It is a front view which shows the modification of a nozzle. It is explanatory drawing which shows a prior art example.

  An embodiment of a heat exchanger cleaning device (hereinafter simply referred to as a cleaning device) of a ceiling-buried air conditioner of the present invention will be described in detail with reference to the drawings. FIG. 1 shows the structure of a general air conditioner. The ceiling-embedded air conditioner A includes an annular or substantially annular finned heat exchanger C as shown in FIG. 2 in the casing B with the lower surface opened, and the finned heat exchanger C A blower D is provided in the central space, and a detachable lid member F that is in close contact with the lower surface of the housing B is provided. The lid member F includes an air inlet G at the center and air outlets H at four locations around the lid member F. The housing B is suspended from the slab by stay bolts J.

  As shown in FIGS. 3 and 6, the cleaning device of the present embodiment includes a receiving tray 5 that is closely attached to the lower portion of the casing B of the air conditioner A by an installation member, and a vertical movement attached to the receiving tray 5. The fluid ejecting nozzle device 1 that rotates is provided, and the fluid ejected from the fluid ejecting nozzle device 1 is sprayed onto the heat exchanger C with fins to clean the heat exchanger C with fins. The cleaning is performed with the lid member F and the blower D removed prior to the cleaning. Then, the waste liquid of the cleaning liquid after cleaning is discharged to the outside through the receiving tray 5.

  The saucer 5 is made of a transparent material such as a synthetic resin into a box shape with an open top, and as shown in FIG. 4, the saucer bottom 5a has a substantially octagonal shape with no four corners. A through hole 5b is formed at the center. And the apparatus attachment part 5c which stands | starts up from the edge of the through-hole 5b is formed.

  In addition, an outer peripheral wall 5d that rises upward is provided on the outer periphery of the saucer bottom portion 5a, and a housing contact portion 5e having a constant width is provided on the inner side of the upper portion of the outer peripheral wall 5d. Further, the tray bottom 5a is provided with a discharge port 5f for discharging the waste liquid of the cleaning liquid after cleaning.

  The size of the tray 5 is a size that can be installed in the opening of the ceiling, and has a side of about 840 mm.

  The fluid ejection nozzle device 1 is fixed to the tray 5 via a device mounting portion 5c provided at the center of the tray bottom 5a.

  As a method of fixing the fluid ejection nozzle device 1 to the tray 5, the fluid ejection nozzle device 1 is placed on the device mounting portion 5 c from the top through the through hole 5 b with the tray 5 placed, and the fluid ejection nozzle device 1. The support plate 3 can be fixed to the device mounting portion 5c with screws or the like.

  In this state, the tray and the fluid ejection nozzle device 1 are suspended from the stay bolt J that suspends the casing B by the installation member 4, and the tray 5 is abutted and fixed to the lower portion of the casing B. Here, the upper surface of the housing contact portion 5e provided inside the upper portion of the outer peripheral wall 5d of the tray 5 contacts the lower portion of the housing B.

  In addition, it is preferable that a member having a cushioning property is disposed on the upper surface of the housing contact portion 5e, that is, a portion having a certain width on the inside contacting the lower portion of the housing B. Such a member is not particularly limited as long as the lower portion of the housing B and the housing contact portion 5e can be in close contact with each other. For example, a flexible member such as rubber, resin, or sponge is used. it can.

  By providing such a member having cushioning properties, the lower part of the housing B and the housing contact portion 5e can be brought into close contact with each other without any gap, and leakage of the cleaning liquid to the outside can be surely prevented.

  The housing abutting portion 5e is provided in a shape having a certain width inside the upper part of the outer peripheral wall 5d, and this certain width is a heat exchanger C with fins of various sizes and shapes, That is, it is set so as to be brought into contact with and in close contact with the lower part of the casing B of various sizes and shapes.

  Moreover, the shape of the corner | angular part in which the connection part of the refrigerant | coolant piping, etc. of the heat exchanger C with a fin was provided has a thing of various magnitude | sizes and shapes especially by a manufacturer or a model. For this reason, there are various variations in the shape of the corresponding corner of the lower portion of the casing B formed according to the size and shape. For this reason, it is preferable that the width of the housing contact portion 5e-1 to be in contact with the corner portion is set wider than the other corner portions.

  Further, in the present embodiment, the outer peripheral wall 5d that rises upward from the outer periphery of the saucer bottom portion 5a is provided with a rising portion 5g that rises further upward than the housing contact portion 5e. Can be covered. In addition, it is more preferable to form the rising portion 5g from a flexible material because the outer surface of the lower portion of the housing B can be further adhered and covered.

  The waste liquid of the cleaning liquid after cleaning the finned heat exchanger C is received by the tray 5 and is drained by the drain hose 5f-1 connected to the discharge port 5f via the discharge port 5f provided on the tray bottom 5a. Properly discharged.

  In the cleaning apparatus of the present invention, by using the saucer 5 having the above-described configuration, a single saucer corresponding to each of the ceiling-buried air conditioners of the casing B having various sizes and shapes can be obtained without preparing a corresponding saucer. It is possible to correspond with the saucer 5.

  The installation member 4 is a member that hangs the tray 5 and the fluid ejection nozzle device 1 from the stay bolt J and fixes them to the lower part of the casing B. FIG. 5 shows a side cross-sectional view of the fastening fixture part. The installation member 4 includes a string-like body 4a that presses the receiving tray 5 to the lower part of the casing B, and a hook 4b that can be attached to a stay bolt J that suspends the casing B is provided at one end of the string-like body 4a. A fastening fixture 4c for adjusting and fixing the length of the installation member 4 is provided at the free end of the string-like body 4a. Moreover, the fastening fixture 4c is provided with a binding tool 4e that can be connected to the binding tool 4i provided at the lower part of the fluid ejection nozzle device 1 at one end.

  The string-like body 4a of the installation member 4 is formed of a flat and strong band-like body, and the fastening fixture 4c includes a pin 4f and a fastening piece 4h that is repelled by a spring 4g on the side in pressure contact with the pin 4f. The string-like body 4a is fixed to the fastening fixture 4c by inserting the free end portion of the string-like body 4a into the space between the pin 4f and the fastening piece 4h. A surface of the tightening fixture 4c facing the pin 4f is provided with a saw blade that allows the string-like body 4a to move only in one direction (tightening direction). The fastening fixture 4c is configured such that the string-like body 4a can freely move when the opposing surface of the fastening piece 4h is retracted from the pin 4f against the spring 4g.

  The installation member 4 is installed in the casing B of the tray 5 by hooking at least two hooks 4b of the installation members 4 on the stay bolts J, and binding the fixture 4e to the fixture 4i. By pulling the roots of the string-like bodies 4a inserted through the respective fastening fixtures 4c, the receiving tray 5 is gradually raised, and the upper surface of the receiving tray 5 is installed in a state of being in close contact with the lower end portion of the casing B. The contact state can be released by switching the fastening piece 4h to the unwinding position. Further, in order to perform stable installation work, it is desirable that the installation members 4 are hooked on the four stay bolts J one by one and a total of four installation members 4 are used.

  Hereinafter, the configuration and operation of the fluid ejection nozzle device 1 will be described in detail with reference to the drawings. FIG. 6 is a diagram illustrating a heat exchanger with fins from the fluid ejection nozzle 2 while automatically moving toward the heat exchanger C with fins. The fluid injection nozzle apparatus 1 which sprays a washing | cleaning liquid on C and wash | cleans the heat exchanger C with a fin is shown.

  In addition to the fluid ejection nozzle 2, the fluid ejection nozzle device 1 includes an air blowing nozzle 9 that drains water after cleaning. The fluid jet nozzle 2 includes seven jet nozzles 2a shown in FIG. 9, and has a system in which cleaning liquid is jetted linearly from each jet nozzle 2a, a slit jet nozzle, and a jet nozzle. Alternatively, it is possible to use a liquid in which the cleaning liquid is ejected while spreading in a spindle shape. In addition, when the cleaning liquid is sprayed vigorously on the finned heat exchanger C to efficiently clean the dirt such as cigarette oil adhering to the finned heat exchanger C, the cleaning liquid is linearly vigorous. A jetting fluid ejecting nozzle is desirable.

  The fluid ejection nozzle 2 and the air blowing nozzle 9 are attached to the upper ends of tubular support rods 10 and 11 that vertically pass through an opening 3 g provided in the center of the support plate 3, and pipes in the support rods 10 and 11 are connected to each other. The cleaning liquid supply source and the pressure air supply source, which will be described later, are communicated with each other, and the cleaning liquid and the pressure air are ejected from the fluid ejection nozzle 2 and the air blowing nozzle 9, respectively. 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 automatically moved around the vertical axis by the rotation drive source 14, and are moved up and down and washed by the elevating drive source 15 and then drained. It is like that.

  Specifically, as shown in FIG. 6, the rotation drive source 14 includes a pair of upper and lower ball bearings 14a, 14a provided on the lower surface of the support board 3 at intervals, and an outer race 14a of the lower ball bearing 14a. -1 is supported by the internal gear 14b attached to the lower surface of the -1 and the inner race 14a-2 of the lower ball bearing 14a, and is engaged with the motor 14c provided between the upper and lower ball bearings 14a, 14a, and 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 the connecting rod 14f. Are connected to each other. The ball bearing 14a preferably has a watertight structure.

  The raising / lowering drive source 15 includes a rack rod 15a connected to the support rods 10 and 11, and a motor 15c for moving the rack rod 15a up and down. The motor 15c is an inner race 14a of the lower ball bearing 14a. -2 is supported by a support member provided on the upper and lower ball bearings 14a and 14a. The connection between the support rods 10 and 11 and the rack rod 15a is performed via the continuous piece 15a-1.

  As shown in FIGS. 7 and 8, the fluid ejection nozzle 2 is supported by a bracket 16 provided at the upper end of the support rod 10 by a shaft 16 a so as to swing freely, and the bracket 16 and the tip of the fluid ejection nozzle 2. It is supported by a coil spring damper 17 interposed between the two sides. In the initial state, the fluid ejecting nozzle 2 is kept horizontal, and when the fluid ejecting nozzle 2 moves downward, the stopper 18 projecting from the support member provided on the inner race 14a-2 is provided with the projecting piece 18 projecting from the fluid ejecting nozzle 2. In this state, when the fluid ejection nozzle 2 further moves downward, the coil ejection damper 17 swings the fluid ejection nozzle 2 downward from the horizontal state.

  Further, the downward movement position is limited by the bellows 20 or the like covering the rack rod 15a, and the problem that it is difficult to spray the cleaning liquid to the lower position of the finned heat exchanger C is solved. The upper end of the support rod 10 and the fluid injection nozzle 2 can be connected by a flexible tube 10a such as a rubber tube.

  In the present embodiment, the rotation motor 14c is controlled by using the optical sensor EX1 provided at the lower part of the support board 3, and the control of the lifting and lowering motor 15c is performed by a fluid ejection nozzle provided at the lower part of the support board 3. 2 is performed by an optical sensor EX2 that detects the downward movement position of 2 and a waterproof limit switch LMS6 provided at the upper end position of the support rod 10. Hereinafter, these operations will be described with reference to the circuit diagram shown in FIG. 10 and the schematic diagram of the rotation operation of the fluid ejection nozzle shown in FIG.

  When the operation switch SW16 provided on the control terminal line 21a connected to the drive control unit 21 of the motor 14c is closed, the motor 14c is driven to rotate the fluid ejection nozzle 2 in the direction of the arrow in FIG. When the optical sensor EX1 comes to a position facing the hole 22 provided in the internal gear 14b by this rotation, the optical sensor EX1 obtains a signal and the alternating relay 82X is activated to connect to the drive control unit 21. The contact 82x provided on the line 21b is closed.

  As a result, the rotation direction of the motor 14c is reversed and reversed. Then, when the fluid ejection nozzle 2 makes one rotation along with the reversal and the optical sensor EX1 comes to the position facing the hole 22 again, the optical sensor EX1 obtains a signal to operate the alternating relay 82X, and the drive control unit 21 The contact 82x provided on the control terminal line 21b connected to is opened. As a result, the rotation direction of the motor 14c is changed again to rotate the fluid ejection nozzle 2 in the direction of the arrow.

  SW17 is a manual switch that intervenes in the alternating relay 82X that is closed when the rotation direction of the fluid ejection nozzle 2 is changed midway. In addition, the speed of the motor 14c can be adjusted by the speed adjusting unit 21c provided in the drive control unit 21. During the rotation operation, the fluid ejection nozzle 2 and the air ejection nozzle 9 repeatedly move up and down, and when the fluid ejection nozzle 2 comes to the down position and the optical sensor EX2 faces the hole 23 provided in the rack 15a, the optical sensor EX2 Obtains a signal and excites the relay 72X. As a result, the movable contact 72x1 of the relay 72X that switches the motor 15c is switched to the forward rotation circuit side of the motor 15c, and the self-holding contact 72x2 is closed to hold the relay 72X.

  As a result, the motor 15c rotates forward and the support rods 10 and 11 move upward via the rack rod 15a. When the rack cage 15a is raised to the upper end position and the limit switch LMS6 is opened, the relay 72X is demagnetized. As a result, the contact 72x1 is switched to the reverse circuit side of the motor 15c, the motor 15c is reversely rotated, and the support rods 10 and 11 are moved downward via the rack rod 15a.

  When the projecting piece 18 comes into contact with the stopper 19 during the downward movement, the fluid ejection nozzle 2 side is pushed down by the coil spring damper 17. Thereby, the fluid ejection nozzle 2 swings downward from the horizontal state. When the support rod 10 reaches the downward movement position, the optical sensor EX2 faces the hole 23 provided in the rack rod 15a, the optical sensor EX2 obtains a signal again, and the relay 72X is excited. Thereby, the contact 72x1 switches to the forward rotation circuit side of the motor 15c, the self-holding contact 72X2 is closed and the relay 72X is self-held, the motor 15c rotates forward, and the support rods 10 and 11 are moved via the rack rod 15a. Move up. Then, at the initial stage of the upward movement process, the fluid ejection nozzle 2 gradually returns in the horizontal direction from the downwardly inclined state, and after the fluid ejection nozzle 2 returns in the horizontal direction, the fluid ejection nozzle 2 moves upward while maintaining that state. The fluid ejecting nozzle 2 rotates while repeating this, whereby the entire heat exchanger C can be cleaned.

  In addition, the hose attachment part for connecting the support rod 10 to the cleaning liquid supply source and the hose attachment portion for connecting the support rod 11 to the pressure air supply source are simply and quickly performed by using a simple fitting. be able to.

  In the above-described embodiment, the fluid ejecting nozzle 2 and the air blowing nozzle 9 are moved up and down by the drive sources 14 and 15 and rotated around the vertical axis to perform cleaning and draining after cleaning. The jet nozzle 2 and the air blowing nozzle 9 are swung up and down, or a type having a jet outlet 2a for jetting fluid so as to spread in a spindle shape is used, or as shown in FIGS. The upper and lower slits 2b are provided on the upper and lower sides, and the cleaning liquid can be jetted in the longitudinal direction extending in the fin length direction of the finned heat exchanger C by the slits 2b. As a result, washing and draining after washing can be performed only by automatically rotating the fluid ejection nozzle 2 and the air blowing nozzle 9 around the vertical axis as described above.

  As shown in FIG. 3, the cleaning water is supplied to the fluid jet nozzle 2 by pumping the liquid in the cleaning liquid tank loaded on the carriage S by a pump or the like, and the compressed air supplied to the air blowing nozzle 9 is supplied by the carriage. The control of the pump and the compressor, the control of the drive sources 14, 15 and the like can be performed by the control device T loaded on the carriage S. A conventionally well-known thing can be used for these structures.

  As mentioned above, although the washing | cleaning apparatus of the heat exchanger of the ceiling-buried type air conditioner of this invention was demonstrated based on embodiment, the washing | cleaning apparatus of the heat exchanger of the ceiling-buried type air conditioner of this invention is limited to said embodiment. However, various modifications can be made without departing from the scope of the invention.

  For example, in the above embodiment, the binding portion is bound to the binding portion provided in the lower portion of the fluid ejection nozzle device 1, but the binding portion may be provided on the bottom portion of the tray or the side surface portion of the outer peripheral wall 5d. it can.

  Moreover, in the said embodiment, although the saucer 5 was formed with the transparent material, in consideration of intensity | strength, durability, etc., one part or all part can also be formed with a metal or another material.

  According to the ceiling-buried air conditioner heat exchanger cleaning apparatus of the present invention having the above-described configuration, the casing-embedded air-conditioner heat exchanger cleaning apparatus having a box-shaped tray can be a housing. It is possible to provide a cleaning device for a heat exchanger of a ceiling-buried air conditioner that can be attached to a ceiling-buried air conditioner having a different size or shape.

  In addition, the cleaning device can be easily installed and removed from the ceiling-embedded air conditioner, and the adhesion between the tray and the lower portion of the housing can be improved to prevent the cleaning liquid from splashing outside.

DESCRIPTION OF SYMBOLS 1 Fluid injection nozzle apparatus 2 Fluid injection nozzle 3 Support board 4 Installation member 4a String-like body 4b Hook 4c Fastening fixing tool 4e Binding tool 5 Sauce 5a Receptacle bottom 5b Through-hole 5c Apparatus mounting part 5d Outer wall 5e Case contact Part 5f Discharge port 5g Rising part A Air conditioner B Case C Heat exchanger with fin J Stay bolt

Claims (5)

A saucer that is in close contact with the lower part of the casing of the ceiling-embedded air conditioner in which a substantially annular finned heat exchanger is arranged in the casing whose bottom surface is released;
An installation member for closely attaching and fixing the tray to the lower end of the housing;
A cleaning device for a heat exchanger of a ceiling-embedded air conditioner provided with a fluid injection nozzle device fixed to the tray that moves up and down and rotates around a vertical axis by a driving device,
The saucer is formed in a box shape with an open top,
A saucer bottom, a through hole provided in the center of the saucer bottom, a device mounting portion that rises upward from an edge of the through hole,
An outer peripheral wall rising upward from the outer periphery of the saucer bottom,
A housing abutting portion having a certain width from the upper portion of the outer peripheral wall toward the inside only in order to abut the lower portion of the housing of the heat exchanger with fins of various sizes and shapes ,
Provided with a discharge port for discharging the waste liquid of the cleaning liquid at the bottom of the tray,
The fluid ejection nozzle device is fixed to the device mounting portion, and the lower part of the housing is closely attached and fixed to the housing contact portion by the installation member. Heat exchanger cleaning device.   2. The ceiling-buried air conditioner according to claim 1, wherein a member having a cushioning property is provided on a surface having a certain width with which the lower portion of the housing comes into close contact with the housing contact portion. Heat exchanger cleaning device.   3. The ceiling according to claim 1, wherein a rising portion that rises further upward than the housing contact portion of the outer peripheral wall is provided, and the rising portion is formed of a flexible material. Cleaner for heat exchanger of buried type air conditioner.   The installation member includes a string-like body, a hook provided at one end of the string-like body, and a fastening fixture for inserting and fixing the free end of the string-like body, and a tightening thereof. 4. The device according to claim 1, further comprising a binding device provided at one end of the fixing device and capable of binding with a binding device provided at a lower portion of the fluid ejection nozzle device. 5. A heat exchanger cleaning device for a ceiling-buried air conditioner as described.   The width of the corner of the housing abutting portion to be brought into contact with the corner portion provided with the connecting portion of the refrigerant pipe of the heat exchanger with fins is set wider than the width of the other corner portion. The heat exchanger cleaning apparatus for a ceiling-buried air conditioner according to any one of claims 1 to 4.

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