JP2832687B2 - Cleaning device for heat exchanger of ceiling mounted 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 a cleaning device for a heat exchanger of a ceiling-mounted air conditioner.

[0002]

2. Description of the Related Art Conventionally, as a cleaning device for a heat exchanger of a ceiling-mounted air conditioner, as shown in FIG. 21, a vinyl cover a is provided on the lower surface of a housing X containing a finned heat exchanger. The cleaning liquid jet nozzle c is inserted from the insertion hole b provided in the vinyl cover a, and the cleaning liquid is sprayed onto the heat exchanger while manually operating the cleaning liquid jet nozzle c to clean the heat exchanger. Things are known. still,
Reference numeral d denotes a drain pipe for guiding drainage collected in the vinyl cover a to a receiver e such as a bucket, f denotes a cleaning liquid tank, and g denotes a pump for pumping up the cleaning liquid from the cleaning liquid tank f and supplying it to the cleaning liquid ejection nozzle c. In addition, 3-102289
Japanese Patent Application Laid-Open Publication No. H10-15095 discloses a method in which a hood is attached to a ceiling surface and a nozzle is inserted through a relatively large window provided in the hood (first embodiment), and a nozzle in which the nozzle is fixed in a hood supported by a relatively large window (Second embodiment) is known.

[0003]

However, the former method is for cleaning the heat exchanger while manually operating the cleaning liquid jet nozzle c, so that it is difficult to uniformly clean the finned heat exchanger. Moreover, easily with the vinyl cover a,
Since it only covers the lower surface of the housing A containing the finned heat exchanger, it is inevitable that the washing liquid scatters around,
For this reason, prior to the cleaning operation, after removing an item under the place where the air conditioner is installed, there is a problem that time is required for preparations prior to the cleaning such as laying a waterproof sheet h on the part. is there. In the latter first embodiment,
Washing the heat exchanger while manually operating the nozzle, it is difficult to wash the finned heat exchanger uniformly,
In addition, the relatively large windows inevitably cause the cleaning liquid to splash out of the windows. Therefore, prior to the cleaning operation, after removing the items under the location where the air conditioner is installed, the cleaning liquid is removed. There is the same problem as the former, which takes time to prepare before washing such as laying a waterproof sheet on the part. Further, in the latter second embodiment, there is no specific description on how to clean the heat exchanger, but since there is a relatively large window, it is inevitable that the cleaning liquid scatters from this window as well. prior to the cleaning operation, as air-Desho after toner has Remove the items below the place being installed, taken time to <br/> destination elevational one ready cleaning or the like laid a waterproof sheet to partial There is the same problem as the former. Therefore, in the lower part of the housing of the air conditioner
A saucer that is in close contact is provided, and the fluid ejection nozzle is supported by the saucer.
Cleaning by automatically operating the fluid injection nozzle
It is conceivable that the heat exchanger
Different sizes and shapes make it easier to fit
Need to be stored and managed.
There is a condition. An object of the present invention is to obtain a cleaning device free of such a problem.

[0004]

In order to achieve the above object, the present invention provides a cleaning apparatus according to the first aspect, wherein a heat exchanger with fins is disposed in a substantially annular shape in a housing having a lower surface opened. A saucer that covers the lower part of the housing of the air conditioner,
A mounting means capable of placing a receiving tray in close contact with the lower end of the housing, and a fluid ejecting nozzle facing the receiving tray that rotates up and down and rotates about a vertical axis by a driving device, Cleaning liquid, air or other fluid is sprayed toward the finned heat exchanger , and
Is moved up and down by the driving device and the driving device,
A fluid ejection nozzle facing the pan rotating about a vertical axis
A central portion having a
And a peripheral portion .

[0005] washing apparatus according to claim 2 wherein the claim 1 wash
In the cleaning device, the cleaning liquid injection nozzle is used as the fluid injection nozzle.
Provide a chisel and an air injection nozzle, from the air injection nozzle
The jetting air is blown in the stroke of the air jet nozzle moving downward.
It is noted that the heat was blown toward the heat exchanger with
Sign .

According to a third aspect of the present invention, there is provided the cleaning apparatus of the first aspect .
In purification apparatus, and a fluid injection nozzle, the cleaning liquid injection Bruno
A nozzle and an air injection nozzle are provided, and the cleaning liquid injection nozzle is
Move the cleaning liquid spray nozzle downward from the horizontal
It is characterized by swinging toward .

[0007] washing apparatus according to claim 4, wherein, in the cleaning apparatus according to claim 1 or claim 2 or claim 3, wherein, 据
String-shaped attachment means attached to at least two places on the left and right of the saucer
Body, hooks attached to each cord, and each
It consists of a fastening fixture that inserts and fixes the free end of the cord.
It is characterized by the following.

[0008]

In the cleaning apparatus according to the first aspect having the above structure, an outer peripheral portion corresponding to the shape of the heat exchanger is attached to the central portion.
Simply replace it, regardless of the shape of the heat exchanger,
Easy to clean, dry, etc.
Can perform a series of operations.

In the cleaning apparatus according to the second aspect having the above configuration, in addition to the operation of the cleaning apparatus according to the first aspect, the cleaning apparatus further includes:
Heat the air with fins while the air injection nozzle moves down
Heat exchanger with fins to spray toward the heat exchanger.
The washing liquid to be applied can be drained sequentially from the top.

[0010] In the cleaning apparatus according to the third aspect having the above configuration, in addition to the operation of the cleaning apparatus according to the first aspect, the cleaning apparatus further includes:
At the position where the fluid ejection nozzle is moved down,
Swing downward from the horizontal
The lowering position of the body injection nozzle is limited and cleaning is performed sufficiently.
It can wash down to the bottom of the heat exchanger with fins, which is difficult.

In the cleaning apparatus according to the fourth aspect, the hook is attached to the ceiling-mounted air conditioner.
After hooking, pull the string and pull the upper surface of the tray to the lower surface of the housing.
, And tighten and fix the free ends of each cord with a fastening fixture.
If the pan is in contact with the lower surface of the housing,
Mounted to the state.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to the embodiment shown in FIGS. In FIG. 1, A indicates a ceiling-mounted air conditioner, and the air conditioner A
Is provided with a ring-shaped or substantially ring-shaped heat exchanger C as shown in FIG. 2 in a housing B having a lower surface opened, and a blower D in a central space of the heat exchanger C with fins; The housing B is provided with a detachable lid member F which is in close contact with a packing E (shown in FIG. 5) on the lower surface. The lid member F has an intake port G at the center and outlet ports H at four locations around the lid. J indicates a stay bolt for suspending the housing B on the slab. This device is
Such a finned heat exchanger C of the air conditioner A
For cleaning. The cleaning is performed after removing the lid member F and the blower D prior to the cleaning. This apparatus comprises a receiving tray 2 which can be closely attached to a lower part of a housing B of the air conditioner A by an installation means 1, and a vertically and rotationally moving fluid jet nozzle 3 facing the receiving tray 2.
The fluid ejected from the fluid ejection nozzle 3 is sprayed onto the finned heat exchanger C, and the finned heat exchanger C
Is to wash. To explain this further, saucer 2
As shown in FIGS. 3 to 5, is formed in a disc shape with a transparent material such as a synthetic resin, and has a through hole 2a in the center of the receiving tray 2, and an upright stand is formed around the through hole 2a. Rising rising wall 2b
And a lid 2c that covers the through hole 2a from above. Reference numeral 2d denotes a discharge port for the cleaning liquid provided in the tray 2.

The fluid ejecting nozzle 3 includes a cleaning liquid ejecting nozzle 3.
a and the air blowing nozzle 3b, and the injection nozzle 3a
Through the through hole 2a, above the support rod 4 (shown in FIG. 6) facing the upper part of the tray 2 from below the tray 2, and supporting the injection nozzle 3b similarly to the upper part of the tray 2 5, the cleaning liquid and the air are laterally attached to the heat exchanger C with fins from the injection nozzles 3a and 3b, and the support rods 4 and 5 are made of aluminum or other metal pipes. The inside of the pipe was used as a fluid passage. The two injection nozzles 3a were vertically displaced from each other, and the air blowing nozzle 3b was mounted so as to face an intermediate height between the injection nozzles 3a.

Reference numeral 7 denotes a driving device for vertically moving the injection nozzles 3a, 3a, 3b and rotating the injection nozzles 3a, 3a, 3b about a vertical axis. The driving device 7 rotates the injection nozzles 3a, 3a, 3b about the vertical axis. Drive unit 8 to be driven, and injection nozzles 3a, 3
a, 3b. The rotation drive unit 8 includes a pair of upper and lower ball bearings 8a, 8a provided at intervals on the lower surface of the tray 2, and an internal gear mounted on the lower surface of the outer race 8a-1 of the lower ball bearing 8a. 8b, a motor 8c provided between the upper and lower ball bearings 8a, 8a supported by the inner race 8a-2 of the lower ball bearing 8a, and a rotating shaft of the motor 8c meshing with the internal gear 8b. The upper and lower outer races 8a-1 are connected to the tray 2 by three connecting rods 8e, and the upper and lower inner races 8a-2 are connected to each other by a connecting rod 8f. In addition, ball bearing 8a
Has a watertight structure.

The drive unit 9 for elevation motion includes a rack rod 9a which is connected to the support rod 4 and 5, is constituted by a motor 9b to move up and down the rack rod 9a, the motor 9b is of the lower ball Beya ring 8a Upper and lower ball bearings 8a, 8a supported by a support member provided on the inner race 8a-2.
It was provided in between. The connection between the support rods 4 and 5 and the rack rod 9a is performed via upper and lower connecting pieces 9a-1 and 9a-2, and the supporting rod 4 is connected to the upper and lower connecting pieces 9a-1 and 9a-2. 9a-2 is slidably mounted on a spring 6 provided on an upper connecting piece 9a-1, and is mounted. The support rod 5 is attached to the upper and lower connecting pieces 9a-1 and 9a-2. It was fixed and attached. LM1
Is a limit switch for detecting the upper limit position of the injection nozzles 3a and 3b, LM2 is a limit switch for detecting the lower limit position of the injection nozzles 3a and 3b, and both limit switches LM1 and LM2 are as shown in FIG. Is provided in the vicinity of the lower connecting piece 9a-2. To explain this, the limit switch LM1 is attached to a side extending below the angle member 10 attached to the lower surface of the lower connecting piece 9a-2, and the limit switch LM2 is supported by the inner race 8a-2. It is provided on the side surface of the fixed rod 11 protruding below the internal gear 8b along the support rods 4 and 5. On the upper surface of the limit switch LM1, 13a, 1
One end of the angle member 11 supported by the connecting piece 9a-2 to which the limit switch LM1 was attached was faced on the upper surface of the limit switch LM2 with the pressing piece 13 tightened and fixed in 3a facing. In this case, the injection nozzles 3a and 3b are moved upward by the rack rod 9a, and the rack rod 9a is further moved upward while the upper end of the nozzle 3a provided on the support rod 4 is in contact with the ceiling surface of the housing B. Then, the support rod 4 is prevented from moving upward and does not move upward any further, but the rack rod 9a further moves upward while compressing the spring 6. For this reason, the strip 9a-
2 also moves upward, and accordingly, the limit switch LM1 also moves upward and is pushed by the pressing piece 13. Note that a bellows 1 covering the outer periphery of the rack rod 9b projecting above the lid 2c is provided.
2, so that the cleaning liquid and the like do not enter the motor 9b side along the rack rod 9b.

The mounting means 1 includes at least the left and right 2
String-like bodies 1a attached to more than two places, hooks 1b attached to each string-like body 1a, and string-like bodies 1a fixed to the tray 2
And a fastening fixture 1c for inserting and fixing the free end of the wire.
To explain this further, as shown in FIG.
a is composed of a flat and strong belt-like body, and the fastening fixture 1c is
A band 1e is attached to a fixture 1d attached to the four corners of the lower surface of the saucer 2.
Mounted via 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. By inserting the free end of the body 1a, the string-like body 1a
Is fixed to the fastening fixture 1c. 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).
Then, the fastening fixture 1c is mounted on the pin 1 against the spring 1g.
f when the opposing surface of the fastening piece 1h is retracted from
You can move freely. As shown in FIG. 5, installation of the tray 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 through the fastening fixture 1c. , Saucer 2 rises gradually,
The upper surface of the tray 2 is installed in a state in which it is in close contact with a packing E (a packing that comes into contact with the lid member F) provided around the housing B. To release this, the fastening piece 1h may be switched to the unwinding position. The mounting means 1 is not limited to the above-described embodiment, and although not shown, an air lift device is attached below the pan 2, and the pan 2 is
, And the tray 2 can be closely attached to the lower surface of the housing B.

In FIG. 3, reference numeral 14 denotes a truck.
Includes a pump WP for supplying high-pressure water to the injection nozzles 3a, 3a, an air compressor AC for supplying compressed air to the injection nozzle 3b, a fan motor for dryer FM, a heater HE for dryer, and a steam generator. S
T, the solenoid valve SV1 intervening in the water supply passage to the pump WP,
Solenoid valves SV2, SV3, SV4 provided in a supply passage for supplying high-pressure water to the cleaning liquid injection nozzle, and solenoid valves SV5, SV6 provided in a supply passage for supplying air to the air blowing nozzle 3b.
(In FIG. 3, the cart 14 is drawn with a larger reduction ratio than that of the tray 2). 14A is an electrical box provided on the cart 14, and 14B is an intake for taking in cool air into the cart 14. The solenoid valves SV3, SV4 and SV6
Is used only in the embodiment shown in FIGS. 12 and 13 described later.

[0018] Next, shown to the electric circuit will be described in FIGS. 9 to 11. FIG. 9 shows an operation circuit of a motor 9b for moving the injection nozzles 3a and 3b up and down. To explain this, the operation circuit includes a switch S which is turned on / off by a command signal.
W1 and a switching contact 52x1 for the auxiliary relay 52X1. The auxiliary relay 52X1 is a return-type limit switch LM1 that closes when the injection nozzles 3a and 3b reach the upper limit position, and the injection nozzles 3a and 3b are set to the lower limit position. Is connected to a power source via the return type limit switch LM2 which is opened when the switch comes. The limit switch LM1 is connected in parallel with the self-holding contact 52x1 of the auxiliary relay 52X1.
−1 was intervened. Thus, when the injection nozzle 3a is moved to the upper limit position and the limit switch LM1 is closed,
The auxiliary relay 52X1 is excited, and its contact 52x1 is switched to the reverse contact. For this reason, the injection nozzles 3a, 3b
Goes down. When the injection nozzles 3a and 3b move to the lower limit position and momentarily open the limit switch LM2, the auxiliary relay 52X1 is de-energized, and the contact 52x1 is connected to the forward rotation circuit. Therefore, the injection nozzles 3a and 3b rise. By repeating this, the injection nozzles 3a and 3b repeatedly move up and down.

FIG . 10 shows an operation circuit of the motor 8c. To explain this, the operation circuit, the motors 8c,
Obtain Bei switching circuit CT1 in order to forward and reverse directions. The switching circuit CT1 has a switch SW3 and a switching contact 61g of an alternate relay 61G, and the switching circuit CT2 has a switch SW4 and a switching contact 52x2 of an auxiliary relay 52X2. The alternate relay 61G is provided with an inversion limit switch LMS3.
When the switch SW5 is operated or the reversing limit switch LMS3 is closed, the switching contact 61g is switched by the signal. That is, each time the reversing limit switch LMS3 is closed, the rotation direction of the motor 8c is reversed alternately. The auxiliary relay 52X2 is connected to a power supply via a normally open type right limit switch LMS4 and a normally closed type left limit switch LMS5. Further, the auxiliary relay 52X2 is connected in parallel with the right limit switch LMS4.
When the right limit switch LMS4 is closed, the auxiliary relay 52X2 is energized to switch the contact 52x2-1 to the normal rotation side and move the injection nozzles 3a, 3b to the right. . Then, when the mitt switch LMS5 is closed at the right end position, the excitation of the auxiliary relay 52X2 is released, the contact 52x2-1 is switched to the reverse side, and the injection nozzles 3a, 3b are moved to the left. In FIGS. 9 and 10, AD indicates a converter for converting AC into DC, TG indicates a tachogenerator, and VR indicates a variable resistor for speed adjustment.

FIG . 11 shows a sequence circuit in which 52W is a relay in which a contact 52w-1 is interposed in the operation circuit of the pump WP, 52A is a relay in which a contact 52a is interposed in the operation circuit of the air compressor AC, 52F is a relay in which the contact 52f is interposed in the operation circuit of the dryer fan motor FM, 52H is a relay in which the contact 52h is interposed in the operation circuit of the heater HE for the dryer, and 52ST is a contact 52st in the operation circuit of the steam generator ST. The relay 52W and the solenoid valve SV1 are connected to the switch SW6, the b contact 52a-1 of the relay 52A and the pump WP.
Contact 5 of the overcurrent relay 51W interposed in the operation circuit of FIG.
Connected to the power supply via 1w. The solenoid valve SV2 is connected to a power source via a switch SW7 and a contact 52w-2 of a relay 52W, and the solenoid valve SV3 is connected to a switch SW8 and a relay 5W.
Is connected to the power supply via a contact 52w-3 of 2W, relay <br/> 52A is a contact of the switch SW10 and the relay 52W 52w
It is connected to a power source via a pressure switch PS that opens at a pressure equal to or higher than -5 and a relay 51a for an air compressor.
The solenoid valve SV5 is connected to the switch SW11 and the auxiliary relay 52.
It is connected to a power supply via a contact 52x1-2 of X1 . 52F is connected to a power supply via a normally-open type push button switch PBS3, a normally-closed type push button switch PBS4, and a normally-closed type inter-thermo switch 49f. Relay 5 in parallel with this
A 2F self-holding contact 52f is provided. Also, the relay 52
H is connected to a power supply via a switch SW14, a contact 52f of the relay 52F and a bimetal switch 26h, and the relay 52ST is connected to a power supply via a switch SW15. The switches SW1 to SW15 are appropriately switched by a command signal from a control unit housed in the electrical box 9A.

[0021] Next will be described the operation of the embodiment shown in FIGS. 1-8. By a command signal from the control unit, the switch S
W1, switch SW3, switch SW6 and switch SW
When the valve 7 is closed, the solenoid valves SV1 and SV2 are opened, and the pump WP operates. At the same time, the motor 8c and the motor 9b
Operates. For this reason, the injection nozzles 3a, 3a make forward rotation extremely slowly (for example, one rotation every 15 minutes), during which the injection nozzles 3a, 3a repeatedly move up and down to 60 kg
/ Cm ^{2 to} 70 kg / cm ² is sprayed from the spray nozzles 3a, 3a onto each part of the finned exchanger C to wash away dust and the like adhering to each part of the finned heat exchanger C. . Then, when the injection nozzles 3a, 3a make one rotation, the limit switch LMS3 is closed. Then, since the reverse rotation circuit of the motor 8c is selected, the rotation of the motor 8c is reversed, and the flushing is continued while rotating the injection nozzles 3a, 3a in the reverse direction. By repeating this, cleaning is performed by uniformly spraying the cleaning liquid on each part of the heat exchanger C with fins.

When the switches SW6 and SW7 are opened by a command signal, the injection of the cleaning liquid from the injection nozzles 3a, 3a is stopped. When the switch SW15 is closed by a command signal thereafter, the steam generator ST is operated to activate the air generator. Steam is blown from the blowing nozzle 3b to the finned heat exchanger C to remove mold odor attached to each part of the finned heat exchanger C and remove the bad smell attached to the finned heat exchanger C. During this time, the injection nozzles 3a, 3a, 3b continue to move up and down and rotate around the vertical axis, as described above. Then, switch SW15
Is opened, the injection of steam from the injection nozzle 3b is stopped. Then, switch SW10 and SW11 are closed by the command signal. Then, the air compressor AC operates. Only when the limit switch LM1 is closed and the contact 52x1 of the auxiliary relay 52X1 is closed, that is, only when the injection nozzle 3b moves down, the solenoid valve SV5 is opened, and the dry air from the air blowing nozzle 3b is subjected to heat exchange with fins. The finned heat exchanger C is drained by spraying it onto the vessel C (the injection nozzles 3a, 3a, and 3b continue to move up and down and rotate as described above). Then, when the switches SW1, SW3, SW10 and SW11 are opened and the switch SW14 is closed by a command signal, the blowing of dry air from the air blowing nozzle 3b stops, and the vertical movement and rotational movement of the injection nozzles 3a, 3a, 3b are stopped. Also stops.
Then, the heater HE for the dryer is energized. Then, when the push button switch PBS3 is manually pressed, the dryer fan motor FM is operated to blow hot air into the space formed between the tray 2 and the housing B to dry the inner surface of the housing B and the finned heat exchanger C. Let it. If the push button switch PBS4 is pressed after a certain period of time, the energization of the heater HE for the dryer and the fan motor FM for the dryer is stopped, and all the operations are completed.

In the above-described embodiment, after the cleaning liquid is sprayed from the cleaning liquid injection nozzle 3a to the finned heat exchanger C to perform cleaning, steam is blown out from the air blowing nozzle 3b to remove the odor, and then the air is blown out. Air was blown out from the nozzle 3b to drain the water, and then hot air was supplied into the housing B for drying. However, depending on the degree of dirt and the like, steam was blown out from the air blowing nozzle 3b to remove the odor. It may be omitted or the case B may not need to be dried with hot air. For this reason, the steam generator ST, the dryer fan motor FM, and the dryer heater HE may not be permanently installed and may be mounted as needed.

[0024] 12 to that shown in FIG. 18 showing another embodiment. To explain this, in this embodiment, the tray 2 made of a transparent material such as a synthetic resin faces the drive unit 7 and the tray 2 which is vertically moved and rotated about a vertical axis by the drive unit 7. Fluid injection nozzles 3a, 3
(b) and an outer peripheral portion 2B which is attached to the central portion 2A so as to be freely replaceable. To explain this further, the central portion 2A has a through hole 2a at the center of the tray 2, and a rising wall 2b rising upward around the through hole 2a.
And a cover 2c that covers the through hole 2a from above. The outer peripheral portion 2B has a circular opening 2e at the center, an overlapping portion 2f partially overlapping the central portion 2A at the peripheral edge, and a rising wall 2g at the outer periphery. The shape of the outer periphery is circular, octagonal, deformed hexagonal, or any other cross-sectional shape of the heat exchanger C to be cleaned, and accordingly, a shape corresponding to the outer peripheral shape of the housing B corresponding thereto. I do. The central portion 2A and the outer peripheral portion 2B were tightened and fixed with a bolt and nut 2j with a packing 2h interposed between the overlapping portions 2f. Thus, by replacing only the outer peripheral portion 2B according to the shape of the heat exchanger C, it can be used for cleaning an air conditioner having heat exchangers of various shapes. In this embodiment, the fluid injection nozzle 3 is made up of a cleaning liquid injection nozzle 3a and an air blowing nozzle 3b.
And one for each. However, the cleaning liquid injection nozzle 3a
Can be provided side by side to improve the cleaning efficiency with the cleaning liquid. The supply of the cleaning liquid to the cleaning liquid injection nozzle 3a and the supply of air to the air blowing nozzle 3b are not shown, but are performed in the same manner as in the first embodiment.

Further, the injection nozzle 3a, the driving device 7 is rotated about vertical movement and the vertical axis 3b, said injection nozzle 3a, the driving unit 8 to rotate the about a vertical axis 3b
And a drive unit 9 for moving the injection nozzles 3a and 3b up and down. The rotation drive unit 8 comprises a pair of upper and lower ball bearings 8 provided at intervals on the lower surface of the tray 2.
a, 8a, the internal gear 8b attached to the lower surface of the outer race 8a-1 of the lower ball bearing 8a, and the inner race 8a-2 of the lower ball bearing 8a, thereby supporting the upper and lower ball bearings 8a, 8a. An upper and lower outer race 8a composed of a motor 8c provided therebetween and a gear 8d on a rotating shaft of the motor 8c meshing with the internal gear 8b.
-1 is connected to the tray 2 by three connecting rods 8e, and the upper and lower inner races 8a-2 are connected to each other by the connecting rod 8f. However, in this embodiment, when the cleaning liquid injection nozzle 3a is moved down,
It was configured to swing downward from a horizontal state.

[0026] To illustrate this, the injection nozzle 3a does this as shown FIG. 15 a, the b, the nozzle main body 3a-1 attached to the tip of the injection nozzle 3a, a bracket 4a provided on the upper portion of the support rod 4 The shaft is supported by a shaft 24 so that it can swing up and down, and the injection nozzle 3 of the nozzle body 3a-1 is
The nozzle body 3a-1 and the injection nozzle 3a at the tip of the nozzle body 3a-1 are kept horizontal by supporting the mounting side of the coil spring damper 25, and when the nozzle body 3a-1 moves downward, a protrusion protruding from the other end of the nozzle body 3a-1. When the piece 26 is brought into contact with a stopper 27 protruding from a support member provided on the inner race 8a-2, and the injection nozzle 3a is further moved downward in this state, the fluid injection nozzle 3a is opposed to the coil spring damper 25, Swinging downward from a horizontal state. Thereby, the lowering position is restricted by the bellows 12 and the like, and the disadvantage that it is difficult to spray the cleaning liquid to the lower position of the heat exchanger C can be easily eliminated. In this embodiment, the motor 8
An AC motor was used as c.

[0027] The driving unit 9 for elevation motion, the support rods 4,
5 and a motor 9b for raising and lowering the rack rod 9a. The motor 9b is supported by a support member provided on an inner race 8a-2 of the lower ball bearing 8a. Upper and lower ball bearings 8
What is provided between a and 8a is not particularly different from the previous embodiment. The support rod 4 provided with the injection nozzle 3a
A supporting rod 5 provided with an injection nozzle 3b;
is connected via upper and lower connecting pieces 9a-1 and 9a-2, and the supporting rods 4 and 5 are connected to the upper and lower connecting pieces 9a-1 and 9a.
a-2. The supporting rods 4 and 5 are formed of hollow pipes, and the injection nozzle 3 is formed through the pipes.
a, to supply a fluid to the injection nozzle 3b;
In addition, the bellows 12 that covers the outer periphery of the rack rod 9b protruding above the lid 2c is attached to prevent the cleaning liquid and the like from entering the motor 9b side along the rack rod 9b. It will not change. In this embodiment, a DC motor is used as the motor 9b.

[0028] Control of the motor 8c for rotating in this example, performed by using an optical sensor EX2 for detecting the downward movement position of the injection nozzle 3a provided at the bottom of the pan 2, control of the motor 9b for elevation motion is , Injection nozzle 3a provided at the lower part of pan 2
And performs the limit switch LMS6 waterproof type provided with a light sensor EX1 to the upper end position of the support rod 4 that detects a downward position will be described with reference to the circuit diagram shown in FIG. 17 and its operation. Control terminal wire 3 connected to drive unit 30 of motor 8c
When the operation switch SW16 provided on the motor 0a is closed, the motor 8
c is driven to rotate the fluid injection nozzle 3a in an arrow direction shown in FIG. 12. The rotation causes the optical sensor EX2 to open the hole 29.
, A signal is obtained from the optical sensor EX2, and the signal causes the alternate relay 82X to operate.
The contact 82x provided on the control terminal wire 30b connected to
Close. As a result, the rotation direction of the motor 8c is opposite to the direction of the arrow (hereinafter, referred to as inversion). Then, with the reversal, the fluid ejection nozzle 3a makes one rotation, and again the optical sensor EX2
Comes to a position facing the hole 29, a signal is obtained from the optical sensor EX1, the alternate relay 82X is operated by the signal, and the contact 82x provided on the control terminal line 30b connected to the drive unit 30 is opened. The direction of rotation for the motor 8c is rotated in the arrow direction shown in FIG. 12 the fluid injection nozzle 3a changes again. SW17 indicates a manual switch that is interposed in the alternate relay 82X that is closed when it is desired to change the rotation direction of the injection nozzle 3a halfway. The speed of the motor 8c can be adjusted by a speed adjusting unit 30c provided in the driving unit 30. During this rotation operation, the ejection nozzles 3a and 3b are repeatedly moved up and down. When the fluid ejection nozzle 3a comes to the downward movement position and the optical sensor EX1 faces the hole 28 provided in the rack rod 9a, A signal is obtained from the optical sensor EX1, and the signal is used to excite the relay 72X. Then, the motor 9b
The movable contact 72x1 of the relay 72X for switching the position is switched to the forward rotation circuit side of the motor 9b, and the self-holding contact 72x1 is switched.
x2 closes and self-holds relay 72X. For this reason,
The motor 9b rotates forward to move the rack rod 9a to the support rods 4,5.
Move up. The rack rod 9a rises to the upper end position,
When the limit switch LMS6 is opened, the relay 72X is demagnetized. Therefore, the contact 72x1 switches to the reverse rotation circuit side of the motor 9b. Therefore, the motor 9b rotates in the reverse direction, moves the rack rod 9a, and moves the support rods 4, 5 downward. When the projection 26 hits the stopper 27 during the downward movement, the fluid ejection nozzle 3a is pushed down against the coil spring damper 25. Therefore, the fluid ejection nozzle 3a swings downward from the horizontal state. When the support rod 4 reaches the lower movement position, the optical sensor EX1 faces the hole 28 provided in the rack rod 9a, and the optical sensor EX1 obtains a signal again.
The signal excites the relay 72X. Therefore, the contact 7
At 2 × 1, switching to the forward rotation circuit side of the motor 9b is performed, and the self-holding contact 72x2 is closed to hold the relay 72X by itself. For this reason, the motor 9b rotates forward and the rack 9
Then, the supporting rods 4 and 5 are moved upward by a. Then, at the beginning of the upward movement process, the fluid ejection nozzle 3a gradually returns to the horizontal direction from the state inclined downward, and moves upward while maintaining the state after the fluid ejection nozzle 3a returns to the horizontal direction. While repeating this, the fluid ejecting nozzle 3a rotates to perform the same series of cleaning operations as described above on the heat exchanger C in the same manner as in the above-described embodiment.

[0029] Incidentally, the attachment of the hose to the support rod 4 or the support rod 5, can be easily rapidly performed be performed using a simple joint instrument 31 shown in FIG. 16. As shown by the solid line in the figure, when the operation piece 31a is tilted along the support rods 4, 5, the projection 31b provided at the tip of the operation piece 31a is provided on the support rods 4, 5. The hose is easily connected to the support rods 4 and 5 when the operation piece 31a is erected as shown by a chain line in the drawing. If a thin contact piece 32 is provided on the tray 2 opposite to the discharge port 2d and the tray 2 is brought into contact with the lower surface of the housing B, the discharge port 2d is lowered and the cleaning liquid discharge port 2d is provided. Easier to move.

FIG. 18 shows a support S for supporting the cleaning device when the cleaning device is stored or transported by car or the like, and the support S is a foldable leg. It has the form of a table having a receiving plate S2 provided with S1 and a hole S3 in the center of the receiving plate S2. The cleaning device is placed on the receiving plate S2 at the lower surface of the receiving tray 2. At this time, the drive device 7 and the like protruding below the tray 2 face the hole S3. In addition, S4 is provided around the receiving plate S2 with an annular storage box S4 having an upper surface as an entrance, a hose connecting the pump WP provided on the carriage 14 and the injection nozzle 3a, an air compressor AC provided on the carriage 14 and an injection nozzle 3a. And a cord for connecting the electrical box 14A and the limit switch are stored in the storage box S4. Each leg S1 is provided with a ring S5.
Then, a hook 1b attached to each of the strings 1a is hung, the free end of each of the strings 1a is pulled, the string 1a is fastened to the support base S, and then tightened with the fastening fixture 1c to perform the main cleaning. The device can be fixed to the support S.

[0031]

According to the first aspect of the present invention, there is provided a cleaning apparatus for a heat exchanger of a ceiling-mounted air conditioner, comprising the above-described structure. In addition, by replacing the outer peripheral part according to the shape of the heat exchanger with the center part, it can be attached to models with different heat exchanger shapes, and even models with different heat exchanger shapes A series of operations such as washing, drying and the like can be performed.

[0032] In the apparatus for cleaning a heat exchanger of a ceiling-mounted air conditioner according to the second aspect, the air is further directed toward the finned heat exchanger only during the downward movement of the air injection nozzle. As a result, the washing liquid adhering to the heat exchanger with fins can be sent out downward from the top so that draining can be reliably performed.

In the apparatus for cleaning a heat exchanger of a ceiling-mounted air conditioner according to the third aspect of the present invention, the fluid ejecting nozzle is further moved downward from a horizontal state at a position where the fluid ejecting nozzle is moved downward. By swinging toward, even if the downward movement range of the fluid ejection nozzle is limited,
It is possible to sufficiently clean the lower part of the heat exchanger.

In the apparatus for cleaning a heat exchanger of a ceiling-mounted air conditioner according to claim 4 having the above-mentioned structure, furthermore, by simply pulling a free end of the cord-like body, the pan can be easily attached to the lower surface of the housing. It is possible to provide an installation means which can be installed in a state in which it is in close contact with, and which is simple in structure and can be obtained at low cost.

[Brief description of the drawings]

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

FIG. 2 is a perspective view of a heat exchanger.

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

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

FIG. 5 is a cut-away side view of a state in which a saucer portion is installed.

FIG. 6 is an enlarged view taken along line AA of FIG. 5;

FIG. 7 is a cutaway side view of the fastening part.

FIG. 8 is an enlarged view of a bogie part.

FIG. 9 is a circuit diagram of a motor drive unit for moving up and down.

FIG. 10 is a circuit diagram of a drive unit of a motor for rotating the motor.

FIG. 11 is an operation circuit diagram.

FIG. 12 is a plan view of another embodiment.

FIG. 13 is a side view of FIG.

FIG. 14 is a cutaway side view attached to the air conditioner.

FIG. 15 is an enlarged side view of the fluid ejection nozzle portion of FIG.

FIG. 16 is an enlarged side view of a connecting portion between a support rod and a hose.

FIG. 17 is an operation circuit diagram of FIG.

FIG. 18 is a cut side view of the support base.

FIG. 19 is an explanatory diagram showing a conventional example.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Installation means 2 Receiving tray 3 Fluid injection nozzle 4 Support rod 5 Support rod 7 Driving device 14 Dolly

Claims (4)

(57) [Claims] 1. A saucer for covering a lower portion of a housing of a ceiling-mounted air conditioner having a heat exchanger with fins disposed in a substantially annular shape in a housing having a lower surface opened, and a saucer closely attached to a lower end of the housing. A mounting means which can be installed, and a fluid ejecting nozzle facing up and down on the tray which is vertically moved and rotated about a vertical axis by a driving device. The drive device and the drive device
On the pan that rotates up and down and rotates about a vertical axis
A central part provided with a fluid jet nozzle facing the
It is characterized by comprising a replaceable outer peripheral part
That a ceiling-mounted air conditioner Desho toner cleaning device of the heat exchanger. 2. A cleaning liquid injection nozzle as a fluid injection nozzle.
A nozzle and an air injection nozzle.
The emitted air is filtered during the downward movement of the air injection nozzle.
The characteristic is that it is sprayed toward the heat exchanger with
The cleaning device for a heat exchanger of a ceiling-mounted air conditioner according to claim 1. 3. A cleaning liquid injection nozzle as a fluid injection nozzle.
And an air injection nozzle, and the cleaning liquid injection nozzle is
Move the cleaning liquid spray nozzle downward from the horizontal
The apparatus for cleaning a heat exchanger of a ceiling-mounted air conditioner according to claim 1, wherein the apparatus is swung toward the ceiling. 4. The mounting means is provided at least on the left and right sides of the pan.
A string attached to the place, and a hook attached to each string,
Tightening to insert and fix the free end of each string fixed to the pan
Teigu and it is constituted by a ceiling-mounted air conditioner Desho toner cleaning device of the heat exchanger according to claim 1 or claim 2 or claim 3, wherein.