JPH1089892A - Automatic cleaning device for heat exchanger of ceiling installed type air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable cleaning liquid and other types of liquid to be uniformly sprayed to a heat exchanger having fins of a ceiling fixed type air conditioner. SOLUTION: This cleaning device is constructed such that, within a casing B having its lower surface released, there are provided a liquid injection nozzle 4 ascending or descending depending on the vertical movement of a lift lever 12 supported at a fixing table 2 fixed to the lower part of a casing B of a ceiling-installed type air conditioner having a heat exchanger C with substantial annular fins is carried out and for injecting cleaning liquid or other types of liquid toward the heat exchanger C having fins while being rotated around a vertical axis, and a hopper 6 covering the lower surface. In this case, the liquid injection nozzle 4 is arranged at the lift lever 12 in such a way that it can be oscillated in an upward or downward direction. When the liquid injection nozzle 4 reaches near a lower end position, its oscillating operation is performed in a upward or rearward direction in cooperation with an ascending or descending operation of the lift lever 12 and at the same time when the liquid injection nozzle 4 performs an oscillating operation, an ascending or descending speed of the lift lever 12 is decelerated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic cleaning device for a heat exchanger of a ceiling-mounted air conditioner which is mainly installed on a ceiling of an office, a playground, a coffee shop or the like.

[0002]

2. Description of the Related Art The applicant of the present invention has previously supported a mounting base mounted on a lower part of a housing of a ceiling-mounted air conditioner in which a substantially annular finned heat exchanger is disposed in a housing whose lower surface is opened. A liquid ejecting nozzle that moves up and down with the raising and lowering movement of the lifted rod, and that rotates around the lifting rod and sprays a cleaning liquid or other liquid toward the finned heat exchanger, and a hopper that covers the lower surface thereof An automatic washing device for a heat exchanger of a ceiling-mounted air conditioner equipped with the following was proposed. (Japanese Patent Application No. 7-143705).

[0003]

In this case, if the liquid ejecting nozzle is lowered to some extent, the bellows and the like covering the bearing member and the rack become obstructive, and the liquid ejecting nozzle cannot be further lowered. As a result, the cleaning liquid cannot be sprayed on the lower part of the heat exchanger. Therefore, a device in which the cleaning liquid can be sprayed to the lower end of the heat exchanger by swinging the liquid jet nozzle downward has been proposed. However, if the swinging operation is performed with the elevating operation speed being constant, the swing speed is added to the descent speed, so that the time for spraying the cleaning liquid on the lower portion is relatively reduced. In other words, the amount of the cleaning liquid to be sprayed is substantially smaller than that of the other portion, and the lower portion is harder to clean than the other portion. The cleaning solution sprayed on the heat exchanger
It easily flows down the fins and accumulates at the bottom of the finned heat exchanger, and it takes time to blow them off with air.
An object of the present invention is to provide an automatic cleaning device for a finned heat exchanger that eliminates such a problem.

[0004]

According to the first aspect of the present invention, there is provided a housing for a ceiling-mounted air conditioner in which a substantially annular heat exchanger with fins is disposed in a housing having a lower surface opened. A liquid injection nozzle that moves up and down with the up and down movement of a lifting and lowering rod supported by a mounting table attached to a lower part, and sprays a cleaning liquid or other liquid toward the finned heat exchanger while rotating about the vertical axis. And a hopper covering a lower surface of the liquid ejecting nozzle, wherein the liquid ejecting nozzle is provided on the elevating rod such that the liquid ejecting nozzle can be vertically swung up and down, and the liquid ejecting nozzle has a lower end. When approaching the position, the vertical movement is performed in conjunction with the vertical movement of the vertical rod, and when the liquid ejecting nozzle performs the vertical movement, the vertical movement speed of the vertical rod is reduced. Features and , By providing such a configuration, it is possible to spray uniformly cleaning solution to all parts of the vertical direction of the heat exchanger finned.

According to a second aspect of the present invention, in the first aspect of the present invention, a heat exchanger with fins is provided adjacent to the elevating rod to blow off liquid sprayed from a liquid injection nozzle. The air injection nozzle for blowing air is provided. With this configuration, more air can be blown to the lower part of the finned heat exchanger in which the cleaning liquid easily accumulates.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows a ceiling-mounted air conditioner A to be cleaned by the present apparatus. The air conditioner A includes a ring-shaped finned heat exchanger C in a housing B having an open lower surface, and the finned heat exchanger C. A blower D is provided in the center space of the exchanger C, and a detachable lid member F is provided which is in close contact with a packing E (shown in FIG. 2) on the lower surface of the housing B. This lid member F is provided with an intake port G at the center and outlets H at four surrounding locations. In addition, the heat exchanger C with an annular fin
The shape is not limited to an annular shape as shown in the figure, but may be an annular shape constituted by a square, a hexagon or other polygons, or a horseshoe or other shape lacking a heat exchange part in a part of the annular shape. It may be something. The case B includes one having a square shape, a rectangular shape, or another shape according to the outer shape of the finned heat exchanger C. Note that J indicates stay bolts that suspend the housing B on the ceiling slab.

The cleaning by the present apparatus is performed after removing the cover member F and the blower D prior to the cleaning.

[0008] The present cleaning apparatus comprises the above-described air conditioner A
Is supported by a mounting table 2 installed by an installation means 1 at a lower portion of the housing B, and the fins are automatically moved by the driving device 3 and the driving device 3 while rotating about a vertical axis. A liquid ejecting nozzle 4 for spraying a cleaning liquid or other liquid toward the heat exchanger C with fins, and a liquid ejected from the liquid ejecting nozzle 4 to the heat exchanger C with fins. And a hopper 6 that covers the liquid ejecting nozzle 4 and the lower surface of the air ejecting nozzle 5. The hopper 6 receives the cleaning liquid and other liquid ejected from the liquid ejecting nozzle 4. Reference numeral 7 denotes a liquid supply / recovery device 8 for supplying a cleaning liquid or other liquid to the liquid injection nozzle 4 and recovering the cleaning liquid or other liquid accumulated on the hopper 6, and an air supply device 9 for supplying air to the air injection nozzle 5. 1 shows a floor-mounted unit that is mounted on a cart 10 and installed on a floor surface. The mounting base 2 is made of a rigid plate made of, for example, carbon fiber and synthetic resin. In the first embodiment shown in FIGS. 2 to 5, the hopper 6 is placed around the mounting base 2. The dish was made of a rigid plate made of the same material as that of the mounting table 2 which was detachably mounted.

To explain these further, the mounting table 2
A lid 2 having an opening 2a in the center, a rising wall 2b rising upward around the opening 2a, and covering the opening 2a from the upper surface.
c, and further provided with a peripheral wall 2 d extending downward around the periphery to form a storage space for the driving device 3 on the lower surface of the mounting base 2. Reference numeral 2e denotes a cover for covering the storage space from below, and the cover 2e is attached to the mounting base 2 by a connecting rod 27 for mounting an outer race 23a of a ball bearing 23 described later to the mounting base 2. A fan (not shown) for cooling the storage space is provided in the cover 2e, an intake hole (not shown) is provided on the lower surface of the cover 2e, and a space is provided between the upper end of the cover 2e and the mounting base 2. The space was used as an outlet for the cool air. The hopper 6 has an opening 6a in the center, a rising wall 6b mounted around the lower part of the mounting base 2 around the opening 6a, and a rising wall 6c provided on the outer periphery.

The outer shape of the hopper 6 is circular.
An octagon, a deformed hexagon, a rectangle, or any other shape having a shape corresponding to the outer peripheral shape of the housing B, and the heat exchangers B of various shapes are formed by replacing only the hopper 6 according to the shape of the housing B. It can be used for cleaning the equipped air conditioner. Reference numeral 6d denotes a drain recovery port provided in the hopper 6. As shown in FIG. 3, the mounting base 2 and the hopper 6 overlap the flange 6e provided on the upper end of the rising wall 6b on the lower surface of the mounting base 2 and use the bolt nut 11 with the packing 6f interposed in the overlapping portion. Tighten and fix.

The liquid ejecting nozzle 4 is connected to an elevating rod 12 (see FIG. 5) facing the upper part of the mounting table 2 from below the mounting table 2 through the opening 2a. The cleaning liquid and other liquid and air jetted from the jet nozzles 4 and 5 are respectively supplied to the upper part of the elevating rod 13 facing the upper part of the mount 2 from below the mount 2 through the opening 2a. Each of the elevating rods 12 and 13 is formed of a stainless steel metal pipe, and the inside of the metal pipe is provided with a cleaning liquid,
A fluid passage for air was used. Lifting rod 12 of liquid jet nozzle 4
As shown in FIG. 5, the liquid ejecting nozzle 4 is attached to the
The nozzle body 4a, which is attached to the tip, is pivotally supported vertically on a bracket 14 provided above the elevating rod 12 so that the nozzle body 4a can swing vertically.
A coil spring damper 15 is attached to the end of a pin 4a-2 inserted into a projection 4a-1 projecting from the rear of the nozzle body 4a and supported by the projection 14a of the bracket 14. Damper 15
Then, the liquid ejecting nozzle 4 is maintained in a horizontal position, and the protruding rod 16 is projected downward from the other end of the pin 4a-2.
When the projecting bar 16 further moves down from the state in which the projecting bar 16 comes into contact with the upper surface of the metal plate 17 attached to the upper surface of the lid 2 c by the lowering movement of the lifting rod 12, the rear end of the liquid jet nozzle 4 against the coil spring damper 15 And the liquid ejecting nozzle 4 swings downward from the horizontal state. As a result, the downward movement of the liquid ejecting nozzle 4 is restricted by the bellows 19 and the like that cover the rack rod 18 that constitutes a part of the lifting drive unit 21 described later, and the cleaning liquid is sprayed to the lower position of the heat exchanger C. The problem of difficulty was solved. The swing of the liquid ejecting nozzle 4 is not limited to the above-described means. The driving device 3 is provided with the injection nozzles 4, 5,
And a vertical drive unit 21 for rotating the injection nozzles 4 and 5 up and down.

Referring to FIG. 2, the rotation drive unit 20 includes the ball bearing 23 provided in the lower part of the storage space on the lower surface of the mounting base 2 and the ball bearing 23.
Internal gear 24 attached to the lower surface of the outer race 23a
A motor 25 supported by a support plate 30 provided on the inner race 23b;
5, the outer race 2
3a is connected and fixed to the mounting base 2 by three connecting rods 27,
The lid 2c is supported by three support rods 28 rising from the inner race 23b so as to rotate with the inner race 23b. The ball bearing 23 had a watertight structure. Reference numeral 22 denotes a metal ring attached to the lower surface of the mounting table 2.

The lifting drive unit 21 is composed of the rack rod 18 connected to the lifting rods 12, 13, and a motor 29 mounted on the support plate 30 for moving the rack rod 18 up and down. A portion of the lifting rods 12 and 13 through which the lid 2c is inserted is provided with a cylindrical portion 31 projecting upward from the lid 2c.
2 and 13 are projected above the lid 2c,
The lifting rods 12, 13 are placed in a cap 33 loosely fitted on the upper surface of
Is provided, and the cap 33 is pressed against the upper part of the cylindrical portion 31 by a spring 34. By doing so, it is possible to prevent the liquid from leaking from the portion where the lifting rods 12, 13 pass through the lid 2c, while allowing the right and left lifting rods 12, 13 to swing slightly to the left and right.

The reference numeral 40 designates each of the two provided on the support plate 30.
5, 29, distribution board such as limit switch LSM, 40a
Indicates a connection cord connected to the distribution board 40.

The dish-shaped hopper 6 mounted around the mounting base 2 is mounted in close contact with the lower surface of the housing B by the mounting means 1 mounted on the mounting base 2, and the mounting means 1 is at least mounted. A string-like body 1a attached to two or more places on the left and right sides of the table 2, a hook 1b attached to each string-like body 1a, and a tightening fixing for inserting and fixing the free ends of the respective string-like bodies 1a fixed to the mount 2. 1c. More specifically, each cord 1a is formed of a flat and tough band, and the fastening fixture 1c is connected to the attachment 1d attached to the four corners of the lower surface of the attachment base 2 via the band 1e. Mounted. Each fastening fixture 1c includes a pin 1f and a fastening piece 1h which is repelled by a spring 1g on a side that comes into pressure contact with the pin 1f, and has a cord-like shape at an interval between the pin 1f and the fastening piece 1h. The string-like body 1a was fixed to the fastening fixture 1c by inserting the free end of the body 1a. A surface of the fastening fixture 1c facing the pin 1f is provided with a saw blade that allows the movement of the cord 1a in only one direction (fastening direction). And the fastening fixture 1c
When the opposing surface of the fastening piece 1h is retracted from the pin 1f against the spring 1g, the cord 1a can move freely. 2, the hook 1b is hooked on the stay bolt J, and the root of each string 1a inserted into the fastening fixture 1c is pulled as shown in FIG. Then, the mounting base 2 gradually rises, and the upper surface of the hopper 6 of the type mounted on the mounting base 2 is installed in a state in which the upper surface of the hopper 6 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 solve this, the fastening piece 1h may be switched to the release position.

As described above, the floor mounting unit 7 supplies the cleaning liquid and the other liquid to the liquid jet nozzle 4 and collects the cleaning liquid and the other liquid accumulated on the hopper 6, and the air injection and recovery device 8. An air supply device 9 for supplying air to the nozzle 5 is prepared on a carriage 10. This will be described in detail with reference to FIG. 9. The cart 10 includes a cart 10 a on which the liquid supply / recovery device 8 is mounted and a cart 10 b on which the air supply device 9 is mounted, and the cart 10 a is configured to be assembled on the cart 10 b. . The carriage 10a has a rectangular mounting table 10a-1 on which the liquid supply / recovery device 8 is mounted, and an operation panel 10a having an upper surface rising from the right end of the mounting table 10a-1 as an operation panel 10a-2.
-3, and a relatively long leg 10a-4 is projected from the lower surface of each corner of the mounting table 10a-1 to place the vehicle 10a on the vehicle 10b. The space for accommodating the air supply device 9 is formed below. The carriage 10b includes a rectangular mounting table 10b-1 on which the air supply device 9 is mounted, and an operation table 10b-3 provided with an operation panel 10b-2 on the upper surface rising from the left end of the mounting table 10b-1. A rectangular groove 10b-4 on which the carriage 10a is placed is provided along the periphery of the periphery of 10b-1.
The trolley 10a can be used in a state where the trolley 10a is mounted on the trolley 10b and assembled, and in a state where the trolley 10b is separated from the trolley 10b. The air supply device 9 is composed of an air compressor, and the liquid supply / recovery device 8 is, as shown in FIG.
A collection tank 8a for collecting drain, and a collection tank 8a
, A cleaning liquid tank 8b divided into three parts provided on one side thereof, a finishing agent tank 8c divided into three parts provided on the other side, and provided below these tanks 8a, 8b, 8c. A high-pressure pump WP for pumping tap water to the liquid injection nozzle 4 is provided. For example, cleaning liquids of different concentrations are stored in three divided cleaning liquid tanks 8b, and the cleaning liquid is selectively used depending on the degree of contamination of the finned heat exchanger C. In this manner, for example, a disinfectant solution, a deodorant solution, and a coating solution (corrosion inhibitor) are prepared in the finishing agent tank 8c divided into three. When a certain amount of liquid is collected in the collection tank 8a, an injection pump DP for guiding the liquid to the outside, for example, a washstand, is provided in the collection tank 8a.

Each of the outlet pipes 35 connected to each of the cleaning liquid tanks 8b has a low-pressure pump P1 for pumping a liquid.
And solenoid valve SV1, low pressure pump P2 and solenoid valve SV
2, a low-pressure pump P3 and a solenoid valve SV3, and each outlet pipe 36 connected to the finishing agent tank 8c has a low-pressure pump P4 for drawing liquid, a solenoid valve SV4, a low-pressure pump P5, a solenoid valve SV5, and a low-pressure pump P6. The outlet pipes 35 and 36 are provided with a solenoid valve SV6, and are connected to a discharge pipe 37 connected to a discharge port of the high-pressure pump WP via a joint pipe 38. SV7 indicates an electromagnetic valve interposed upstream of the connection between the outlet pipes 35 and 36 of the discharge pipe 37. Reference numeral 8e denotes an air vent pipe which rises from the high pressure pump WP and communicates the upper end with the recovery tank 8a, and SV8 denotes a solenoid valve interposed therebetween. In FIG. 12, FS1, FS2
Denotes a float switch provided in the recovery tank 8a for detecting the liquid level. Note that in FIG.
2 shows a limit switch LMS provided at the upper end of the second switch for detecting the upper limit position of the waterproof type.
Is supported by a shaft 4 provided in a bracket 4a-3 protruding laterally from the nozzle body 4a so as to be vertically movable so as to be vertically movable, and is resiliently upwardly resilient by a spring 47 surrounding and surrounding the shaft 48. Provided. Reference numeral 48a denotes a flange-shaped stopper provided below the shaft portion 48. By doing so, the spring 47 absorbs the impact force when the limit switch LMS hits the ceiling surface, so that the limit switch LMS does not hurt.

The lower end of the elevating rod 12 and the drain recovery port 6d provided in the hopper 6 are connected to a detachable hose 3.
The lower end of the air jet elevating rod 13 is connected to an air supply device via a detachable hose 46. The lifting drive unit 21
Are controlled by using an optical sensor E3 X3 for detecting a vertical swing starting position of the liquid ejecting nozzle 4, an optical sensor E3 X1 for detecting a lowering position of the lifting rods 12, 13, and the limit switch LMS. The operation is shown in FIG.
The description will be made according to the circuit diagram shown in FIG.

Switch SW1 intervening in relay 52X1
Is pressed, the relay 52X1 is excited and the motor 2
The contact 52x1 interposed between the terminal wires of the control board DR1 of No. 9 is closed. As a result, the lifting motor 29 rotates forward to move the rack rod 18 downward. The lifting rods 12 and 13
Moves down. Then, the position where the protruding rod 16 abuts on the surface of the cover plate 2c is detected by the optical sensor E3X3 (the rack rod 18).
Is detected), the relay 52x3 is excited, and the switching contact 5 provided on the terminal wire of the control board DR1 of the motor 29 is detected.
2x3 is switched from the high-speed fixed contact 52x3-1 to the low-speed fixed contact 52x3-2. As a result, the lifting motor 29
Is decelerated. When the lifting rod 12 reaches the lower limit position, the light sensor E3X1 detects this (the rack rod 18).
The small hole provided in the PC) and the program controller PC
, And output from the terminal line of the program controller PC to excite the relay 52X2,
The contact 52x2 provided on the terminal line of the control board DR1 is closed. As a result, the motor 29 for raising and lowering is rotated in the reverse direction, and the lifting rod 12 is raised. When the optical sensor E3X1 detects a position (swing end position) at which the protruding rod 16 separates from the surface of the cover plate 2c, the control board DR of the motor 29 is detected.
The switching contact 52x3 provided on the terminal line 1 is switched from the fixed contact 52x3-2 on the low-speed side to the fixed contact 52x3-1 on the high-speed side. Thus, the rotation of the elevating motor 29 returns to the normal speed.

When the lifting rod 12 reaches the upper limit position, the limit switch LMS is opened, and the relay 52X2 connected to the terminal line of the program controller PC is demagnetized. As a result, the contact 52x2 provided on the terminal line of the control board DR1 is opened. As a result, the motor 2
9 rotates forward again to move the lifting rod 12 downward.

When the switch SW1 is opened, the relay 52 is opened.
X1 demagnetizes and opens its contact 52x1. As a result, the motor 29 for lifting and lowering stops.

Next, control of the rotation drive unit 20 will be described.
The control of the rotation drive unit 20 is performed using an optical sensor EX2 provided at the lower part of the mounting base 2 for detecting a rotation base point. To explain this, when the switch SW6 provided on the terminal line of the control board DR2 of the motor 25 for rotation is pressed, the motor 2 for rotation is rotated.
5 rotates forward to rotate the mounting table 2 clockwise. The rotation speed is determined by moving the movable contact RS3 provided on the control board DR2 to the first fixed contact RS3-1 and the second fixed contact RS3-2.
And the third fixed contact RS3-3, the extremely fast speed when spraying the chemical solution, the slightly slower speed when spraying a large amount of the chemical solution when the soil is slightly heavy, and the extremely slow speed when washing. The speed can be switched to three stages. When the liquid ejecting nozzle 4 makes one rotation and the optical sensor E3X2 detects a small hole (starting position, not shown) provided in the internal gear 24, the signal is input to the terminal line of the program controller PC and the program controller PC Is output to the terminal line of the control board DR2 to rotate the motor 25 for rotation in the reverse direction. In this case, if the rotation motor 25 is used as a brake motor and the brake is applied for several seconds, the starting position can be easily confirmed. When the switch SW6 is pressed, the power to the terminal wire of the control board DR2 is cut off and the motor 2 for rotation is turned off.
5 stops.

Next, the application of the detergent will be described.

Each outlet pipe 3 connected to each washing liquid tank 8b
5 low pressure pumps P1 to P3 and solenoid valves SV1 to SV
3 is selected by the rotary switch RS1, and when the push button switch SW3 is pressed, the cleaning liquid is supplied from the selected cleaning liquid tank 8b. When the push button switch SW3 is pressed again, the button switch SW3 is pressed.
Opens to cut off the power to the low pressure pumps P1 to P3 and the solenoid valves SV1 to SV3. This stops the application of the cleaning liquid.

To perform the cleaning operation, first, the water supply side of the high-pressure pump WP is connected to a water supply source such as water supply, and the push button switch SW5 is pressed. Then, while the switch SW5 is being pressed, the solenoid valve SV8 interposed in the air vent pipe 8e is energized and opened to release air from the high-pressure pump WP. Next, when the push button switch SW2 is pressed, the solenoid valve SV7 provided in the discharge pipe 37 is energized, and the solenoid valve SV7 is turned on.
Is opened and the relay 52WP is excited to operate the high-pressure pump WP. As a result, a cleaning operation in which the cleaning liquid is sprayed from the liquid injection nozzle 4 toward the finned heat exchanger C is performed. When the push button switch SW2 is pressed again, the push button switch SW2 is opened and the high pressure pump WP is opened.
Is stopped and the solenoid valve SV7 is closed. Thus, the cleaning operation is completed. After the completion of the washing operation, the low-pressure pump P4 and the solenoid valve SV4, the low-pressure pump P5 and the solenoid valve SV5 interposed in the outlet pipe 36 connected to the outlet of the finishing agent tank 8c.
When one of the low pressure pump P6 and the solenoid valve SV6 is selected by the rotary switch RS2 and the push button switch SW4 is pressed, the selected low pressure pump is activated and the solenoid valve is opened, and a desired finishing material, for example, Disinfectant solution, deodorant solution,
The coating agent liquid (corrosion inhibitor) is sprayed from the liquid injection nozzle 4 to the finned heat exchanger B.

The liquid recovered in the recovery tank 8a is
Float switch FS provided for detecting the upper limit position
1 and the liquid level is detected by FS2 for detecting the lower limit position, and the injection pump DP is operated to discharge the liquid to the outside.

To explain this, both float switches F
When S1 and FS2 are closed, the program controller P
Output to the terminal line of C to drive the injection pump DP. The driving of the injection pump DP is continued through the terminal line of the program controller PC until the float switch FS2 is opened. When the float switch FS2 is opened, the output to the terminal line of the program controller PC is cut off and the injection pump DP is stopped. . In addition. Pressing switch SW9 shuts off the power and stops all functions.

Next, the operation when the liquid is drained by injecting air from the air injection nozzle 5 will be described with reference to the circuit diagram shown in FIG. In this circuit, the control operation of the rotary drive unit 20 and the control elevation drive unit 21 is the same as the operation when the above-described cleaning operation is performed. Therefore, the description is omitted. The parts performing the same functions are given the same reference numerals as those shown in the circuit at the time of cleaning. In this case, first, a switch SW2 interposed in the relay 52AC is pressed. Then, the contact 52 intervening in the air compressor AC
Close ac. Thereby, the air compressor AC operates. The air compressor AC includes a pressure storage tank and a pressure switch. Next, the switch S intervening in the operation circuit of the solenoid valve SV9 interposed in the air supply path
Press W3. Then, since the b contact 52x2b of the relay 52X2 is interposed in the operation circuit of the solenoid valve SV9,
The elevator motor 29 opens the solenoid valve SV9 and blows air from the air injection nozzle 5 only when the rack motor 18 rotates forward to move the rack rod 18 downward, that is, only when the elevator rods 12 and 13 move downward.
13 and 14, F1 and F2 are fuses, and 45 is an AC / DC converter for converting AC100V to DC24V.
A DC converter 43 indicates an AC / DC converter for converting AC100V to DC5V.

FIGS. 15 to 20 show another embodiment. In this embodiment, the mounting base 2 is provided with a support fitting 41 having four extendable support arms 41a and a support fitting 41 provided along the support arms 41a. The hook 42 for locking the stay bolt J described above.
The string piece 42 provided with a is attached to the lower surface of the housing B. According to this, it can be attached to all air conditioners A having different sizes and shapes. To explain this, as shown in FIG. 16, the support fitting 41 includes a ring 41b mounted on the lower surface of the peripheral portion of the mounting base 2, and after projecting downward from the ring 41b at four places of the ring 41b. A bracket 41c extending outward is provided, and the support arm 41a is attached to the bracket 41c via a universal joint 41d so that the support arm 41a can move up, down, left, and right. To explain this, the universal joint 41d has a horizontal shaft 41d-2 attached to the bracket 41c with screws 41d-1 and a horizontal shaft 41d-3 provided on the vertical shaft 41d-2. A support piece 41d-5 for supporting a support arm 41a rotatably mounted about 41d-4.
The support piece 41d-5 is provided with a pin 41d-6 that is resiliently pressed by a spring (not shown) on the side that comes into pressure contact with the mounting plate 41d-3. The mounting plate 41d-3 can be fixed at an arbitrary inclined position by engaging with a plurality of holes (not shown) arranged along an arc centered on the horizontal shaft 41d-4.

The support arm 41d-5 has a support arm 41d-5.
a, and a cylindrical body 41d-7 for inserting the
After the support arm 41a is inserted into the arm, an arbitrary position can be tightened with the screw 41d-8. The supporting arm 41a is composed of a hollow rod 41a-1 and a sliding rod 41a slidably inserted therein.
-2, and the sliding rod 41a-2 is attached to the hollow rod 41a-1.
The length of the support arm 41a can be adjusted by changing the length at which is inserted and tightening and fixing it at an arbitrary position with a screw 41a-3. 41a-4 is a hook engaged with the outer periphery of the housing B provided at the tip of the support arm 41a, and 41a-5 is a hook
1a shows a locking claw for allowing the string piece 42 to follow. In this case, by adjusting the length of the support arm 41a, the support arm 41a can be attached to the lower surface of the housing B having a different size. Further, as shown in FIG. Can also be attached to the lower surface of the housing B.

Further, as shown in FIG. 20, the support arm 41a
To make all of them protrude downward, mount 2
And the like can be used as a support for supporting this when not in use.

When the mounting base 2 is mounted on the housing B by this means, a water-resistant hopper 43 made of a resin sheet or the like is mounted so as to cover the mounting base 2 and the housing B as shown in FIG. The attachment is performed by engaging a hook 43a attached to the upper end of the hopper 43 with the stay bolt J. By doing so, the hopper 4
Since the mold 3 can be freely deformed, the support fitting 41 is used.
The housing B of any shape can be washed by the combination of the above.

Reference numeral 43b denotes a connection cord 40a and an outlet for the hoses 39 and 46 provided in the hopper 43.

Next, the cleaning operation by the present apparatus will be described.
In order to perform the cleaning work by this device, first, the high pressure pump WP
Is connected to the water tap via a hose, and the solenoid valve S
Open V8 and bleed any remaining air from the hose. Thereafter, any one of the solenoid valves SV1 to SV3 provided in the outlet pipe 35 of any one of the cleaning liquid tanks 8b is opened, and one of the low-pressure pumps P1 to P3 is operated. A cleaning liquid is sprayed on the inner surface of the housing B. At this time, the solenoid valve SV8 is closed. Then, the cleaning liquid is sprayed while rotating the rotation motor 25 at a high speed or a medium speed (about one minute), the selected low-pressure pump is stopped, the solenoid valve is closed, and the cleaning liquid spraying operation is completed. While rotating the 25 at a low speed (about 14 minutes), the solenoid valve SV7 is opened and the high-pressure pump WP is operated to spray tap water onto the finned heat exchanger C and the inner surface of the housing B to perform cleaning. At this time, the rotation motor 25 is connected to the liquid jet nozzle 4 as described above.
Is rotated at such a low speed that it rotates once every 14 minutes, and the motor 29 for raising and lowering moves the lifting rods 12 and 13 normally by 72 mm.
When the elevating rods 12 and 13 come to the down position, they are rotated at a reduced speed of about 24 mm / sec. Thereafter, the high-pressure pump WP is stopped, the solenoid valve SV7 is closed, and one of the solenoid valves SV4 to SV6 is opened while rotating the rotation motor 25 at a high speed or a medium speed (about one minute) to open the finishing agent tank 8c. By operating any of the low pressure pumps P4 to P6 provided in the outlet pipe 36, the finishing agent is sprayed on the finned heat exchanger C and the inner surface of the housing B. Thereafter, the air supply device 9 is operated, and the heat exchanger C with fins is
In addition, the liquid adhering to the inner surface of the housing B is drained for about 14 minutes to complete the operation. At this time, the rotation motor 2
5, the liquid jet nozzle 4 is rotated at a low speed of about once every 14 minutes as described above, and the motor 29 for raising and lowering moves the raising and lowering rods 12 and 13 at a speed of usually about 72 mm / sec. When the rods 12 and 13 come to the lower movement position, the rods 12 and 13 are rotated at a reduced rotational speed of about 24 mm / sec. By doing so, when the liquid jet nozzle 4 swings at the lower position of the elevating rods 12 and 13,
The same amount of cleaning liquid or other liquid as that of the upper part is sprayed on the lower part of the finned heat exchanger C, so that the entire finned heat exchanger C can be uniformly cleaned and the finned heat exchanger can easily collect the cleaning liquid. The liquid can be effectively drained by blowing more air into the vessel C.

[0035]

According to the first aspect of the present invention, when the liquid jet nozzle swings up and down, the moving speed of the lifting rod is reduced by the lifting rod. The cleaning liquid can be sufficiently sprayed on the lower part of the finned heat exchanger, and the lower part of the finned heat exchanger can be sufficiently cleaned.

In the cleaning device for a heat exchanger of a ceiling-mounted air conditioner according to the second aspect of the present invention, since the vertical movement speed is low at the lower part, the cleaning liquid can collect and blow air intensively at the lower part. I can do it.

[Brief description of the drawings]

Fig. 1 Slope view of air conditioner

FIG. 2 is a side view showing an example of an embodiment of the present invention.

FIG. 3 is a plan view showing a state before installation.

FIG. 4 is a plan view showing a state before installation.

FIG. 5 is an enlarged view of a part of FIG. 2;

6 is an AA line view of FIG.

FIG. 7 is a view taken along the line BB of FIG. 5;

FIG. 8 is an enlarged view of a part of the installation means.

FIG. 9 is a side view of the ground installation part.

FIG. 10 is a plan view of FIG. 8;

11 is a sectional view taken along line CC of FIG. 10;

FIG. 12 is a side view of a part of the drain tank cut away.

FIG. 13 is an operation circuit diagram for performing a cleaning operation.

FIG. 14 is an operation circuit diagram for performing an operation of blowing air.

FIG. 15 is a side view showing another embodiment.

FIG. 16 is a side view of the support bracket.

FIG. 17 is a plan view of a support bracket.

FIG. 18 is a plan view showing a state where the direction of the arm of the mounting bracket is changed.

FIG. 19 is a perspective view of a universal joint portion of a mounting bracket.

FIG. 20 is a side view showing a state where the arm of the mounting bracket is used as a support base.

[Explanation of symbols]

1 installation means 2 mounting base
3 drive 4 liquid injection nozzle 5 air injection nozzle 6,
43 Hopper

Claims (2)

[Claims] 1. A ceiling-mounted air conditioner in which a heat exchanger with a substantially annular fin is disposed in a housing whose lower surface is opened. A ceiling-mounted type including a liquid ejecting nozzle that moves up and down and sprays a cleaning liquid and other liquids toward the finned heat exchanger while rotating about the vertical axis, and a hopper that covers a lower surface of the liquid ejecting nozzle. In the automatic cleaning device for a heat exchanger of an air conditioner, the liquid ejecting nozzle is provided on the elevating rod so as to swing up and down, and when the liquid ejecting nozzle comes near the lower end position, it is interlocked with the elevating operation of the elevating rod. An automatic radiator for a heat exchanger of a ceiling-mounted air conditioner, wherein the liquid ejecting nozzle performs an oscillating operation in a vertical direction and, when the liquid ejecting nozzle performs an oscillating operation, reduces the elevating speed of the elevating rod. Cleaning equipment. 2. An air injection nozzle for blowing air to a heat exchanger in order to blow off the liquid sprayed from the liquid injection nozzle is provided in parallel with the lifting rod. Automatic cleaning equipment for heat exchangers of ceiling-mounted air conditioners.