JP3047181B1 - Cleaning device for heat exchanger of ceiling mounted air conditioner - Google Patents

Abstract

An object of the present invention is to increase the residence time of the cleaning liquid on the fins of the finned exchanger C and to spread the cleaning liquid over the entire area of the fins, thereby enhancing the cleaning effect. SOLUTION: In order to blow off the cleaning water sprayed on a finned exchanger 5 and a liquid jet nozzle 4 for spraying cleaning water after spraying a cleaning liquid toward a finned exchanger C of a ceiling-mounted air conditioner. A liquid ejecting nozzle 4 for ejecting liquid from the liquid ejecting nozzle 4. The liquid ejecting nozzle 4 and the air ejecting nozzle 5 are vertically moved and rotated about a vertical axis by a driving device 6 to eject the liquid from the liquid ejecting nozzle 4. At this time, the air is jetted from the air jet nozzle 5 only when the air jet nozzle 5 is moved upward, so that the residence time of the cleaning liquid in the fins of the finned exchanger C is lengthened and the entire area of the fins is extended. The cleaning effect is enhanced by spreading the cleaning solution.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

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

[0002]

2. Description of the Related Art Conventionally, a nozzle which rotates around a vertical axis is provided, a cleaning liquid is sprayed from the nozzle toward a finned heat exchanger, and then cleaning water is supplied from the nozzle toward a finned heat exchanger. spraying, and then by blowing air from the nozzle toward the heat exchanger finned cleaning apparatus that as possible blow the washing water adheres to the fins or the like are known (JP-a-8-178590). Further, as a cleaning device for performing the same cleaning, a liquid jet nozzle and an air jet nozzle are respectively provided, and not only rotating both nozzles around a vertical axis, but also cleaning the finned heat exchanger while moving up and down. The applicant of the present application has already proposed what to do (Japanese Patent Laid-Open No. Hei 9-210593).

[0003]

However, since the fins of the finned heat exchanger are generally arranged in a vertical direction, the cleaning liquid sprayed on the finned heat exchanger tends to flow downward along the fins. In addition, the residence time of the cleaning liquid on the fins is short, so that the cleaning effect is not sufficient, and the cleaning liquid is difficult to spread on the fin surface opposite to the side facing the nozzle. It is an object of the present invention to provide a cleaning device for a heat exchanger of a ceiling-mounted air conditioner which solves 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 substantially annularly in a housing having a lower surface opened. A liquid jet nozzle that sprays a cleaning liquid and then sprays cleaning water toward the finned heat exchanger of the air conditioner, and an air jet nozzle that jets air to blow off the cleaning water sprayed on the finned heat exchanger. with the door, the liquid ejection nozzle and the air ejection nozzle in the cleaning device of the heat exchanger of the ceiling-mounted air conditioner Desho toner which is adapted to rotate about the axis vertically movable and vertically by a driving device, the air ejection nozzle Is provided below the liquid ejection nozzle,
In addition, since the air is jetted from the air jet nozzle only when the liquid jet nozzle is moved upward, the cleaning liquid can be pushed up by the air jetted from the air jet nozzle, and the residence time of the cleaning liquid on the fins is lengthened. And the cleaning liquid can spread to the fin surface opposite to the side facing the nozzle, and further to the inner surface of the housing outside the finned heat exchanger. And the cleaning effect can be enhanced.

[0005] washing apparatus according to claim 2, wherein, in the cleaning device according to claim 1, in an air jet nozzle, it was to have a width the rotation direction, the air flow ejected from the nozzle
The cleaning liquid, which has been made wider and more effectively sprayed on the finned heat exchanger, can be spread over the fin surface on the side opposite to the side facing the nozzle.
In line-out Watarura cause we can further can Watarura go the cleaning liquid to the inner surface of the outer housing of the heat exchanger finned.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to FIGS. In FIG. 1, A indicates a ceiling-mounted air conditioner, and the air conditioner A
Has 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 the fins C1 of the heat exchanger C with fins are arranged in a vertical direction. A blower D is provided in the center space of the finned heat exchanger C, and a detachable lid member F is provided which is in close contact with a packing E (shown in FIG. 5) on the lower surface of the housing B. This lid member F is provided with an air inlet G at the center and outlets H at four locations around the lid. still,
In FIG. 1, J indicates stay bolts that suspend the housing B on the slab.

The present cleaning apparatus is for cleaning such a finned heat exchanger C of the air conditioner A. This cleaning is performed after removing the lid member F and the blower D prior to the cleaning.

The cleaning apparatus comprises a ceiling installation section 1 installed on the lower surface of an air conditioner A by an installation means 3, and a floor installation section 2 installed on a floor.

[0009] The ceiling installation unit 1 is provided with the finned exchanger C
, A liquid ejecting nozzle 4 for spraying a washing liquid and washing water, an air ejecting nozzle 5 for blowing air, and a driving device 6 for vertically moving and rotating about a vertical axis.
A receiving tray 7 attached so as to be able to cover the lower surface of the housing B in close contact with the lower surface of the housing B by the mounting means 3, and receives the cleaning liquid or the like jetted from the liquid jet nozzle 4 at the receiving tray 7.

At the center of the receiving tray 7, there is provided a through hole 7a, and a supporting rod 8 is provided through the through hole 7a so as to face upward from below the receiving tray 7. Nozzle 4
Is mounted sideways so that the washing liquid and washing water can be sprayed toward the finned heat exchanger C.
Each of the supporting rods 9 is mounted laterally on the upper part of the supporting rod 9 facing the upper part of the receiving tray 7 from below the receiving tray 7 through the through hole 7a so that air can be blown toward the heat exchanger C with fins. Reference numerals 8 and 9 are formed of aluminum or other metal pipes, and the inside of the support rod 8 is used as a passage for the cleaning liquid, and the inside of the support rod 9 is used as an air passage. The receiving tray 7 has a central portion 7A supporting the liquid jet nozzle 4, the air jet nozzle 5 and the driving device 6.
And an outer peripheral portion 7B detachably connected to the outer peripheral portion 7B. The outer peripheral portion 7B is formed of a transparent material such as a synthetic resin into a disk shape or a polygon shape according to the shape of the housing B. Thus, by replacing the outer peripheral portion 7B, the ceiling installation section 1 can be attached to a cleaning device having a different shape and size.

A reinforcing plate 10 having a through hole 10a overlapping the through hole 7a is attached to the lower surface of the central portion 7A of the receiving tray 7, and a rising wall 7b which rises upward is provided around the through hole 7a. A cover 7c is provided above the through hole 7a so as to cover the upper surface of the through hole 7a so as to rotate integrally with the liquid ejection nozzle 4, the air ejection nozzle, and the like. The lid 7c is supported on four receiving rods 13 projecting upward so as to surround the rack rod 11 from the upper surface of a motor 20 that moves the rack rod 11 described later up and down, and floats from the rising wall 7b. Was supported.

Reference numeral 7d denotes a sealing material made of rubber or the like which closes a gap between the rising wall 7b and the lid 7c attached around the rising wall 7b in a liquid-tight manner, 7e denotes a washing liquid outlet provided in the tray 7, and 7f denotes a cleaning liquid outlet. A sealing material such as a sponge provided on the inner surface of the rising wall 7g provided on the outer periphery of the outer peripheral portion 7B of the receiving tray 7 is shown. The sealing material 7f is used between the rising wall 7g and the outer surface of the housing B. The washing liquid is prevented from being scattered and leaked from the formed interval. After
As described above, only when the air ejection nozzle 5 moves up,
Air is blown out from the air blowing nozzle 5 (downward movement).
Do not blow out when the air blows)
As a result of the intermittent operation, the air
The part where the air blown from the outlet nozzle 5 does not hit is oblique.
May be formed as vertical stripes.
There is a risk that the cleaning solution will not be pushed up. There
In, this that as the air jet nozzle 5, as shown in FIG. 7, flat and in the rotational direction with a nozzle width used as ejecting air, to have a width in the airflow ejected from the nozzle 5
Then, the cleaning liquid is pushed up by the air described above.
Eliminate the risk of missing parts . Further, the air ejection nozzle 5 is attached to the support rod 9 side via a telescopic tube 5a so that the distance between the air ejection nozzle 5 and the finned heat exchanger C can be adjusted. Was opened obliquely upward.

The driving device 6 includes a rotation driving unit 6A for rotating the liquid ejection nozzle 4 and the air ejection nozzle 5, and a vertical movement driving unit 6B for moving the liquid ejection nozzle 4 and the air ejection nozzle 5 up and down.

[0014] Rotation driving section 6 A, the ball Beya ring 1 mounted to exist this with distance below the reinforcing plate 10
5, an internal gear 16 provided on the lower surface of the ball bearing 15; a motor 17 provided in a space formed between the ball bearing 15 and the reinforcing plate 10; The ball bearing 15 is constituted by a gear 18 on a rotating shaft of a motor 17.
The motor 5 was fixedly supported on the inner race 15a of the ball bearing 15 by suspending and fixing the motor 5b together with the internal gear 16 to the tray 7 with a support rod 19. Note that the ball bearing 15 had a watertight structure.

The vertical drive unit 6B includes a rack rod 11 connected to the support rods 8 and 9, and a motor 20 for moving the rack rod 11 up and down. The motor 20 is an inner race 15a of the ball bearing ring 15. It is supported and fixed via a support member. Reference numeral 12 denotes a connecting plate for connecting the supporting rods 8 and 9 to the upper end and the lower end of the rack rod 11, reference numeral 21 denotes a bellows that watertightly covers the rack rod 11 facing the upper part of the tray 5, and the rack rod 11 is a bellows 21. As a result, the downward movement position is limited, and accordingly, the downward movement of the liquid ejection nozzle 4 and the air ejection nozzle 5 is also limited. In particular, since the cleaning liquid and the cleaning water are applied to the heat exchanger C with fins as vigorously as possible from the liquid jet nozzle 4, the cleaning liquid and the cleaning water spread less. Therefore, the cleaning liquid and the cleaning water cannot be sprayed on the lower end portion of the finned heat exchanger C. Therefore, the liquid ejection nozzle 4 is pivotally supported on the upper end portion of the support rod 8 by the main body portion 4a, and a coil spring damper 22 is provided between the front end side of the main body portion 4a and the upper connecting plate 12. With the coil spring damper 22 interposed therebetween, a horizontal state is maintained by the coil spring damper 22, and a projecting rod 23 projecting downward from the rear end of the main body portion 4a is projected. When the lower end of the main body portion 4a further lowers after contacting with a reinforcing metal plate (not shown) provided on the upper surface of the receiving tray 7, the main body portion 4a is gradually tilted against the coil spring damper 22, and the liquid jet nozzle 4 The cleaning liquid from the fin is blown obliquely downward, so that it can be sprayed to the lower part of the finned heat exchanger C.

The floor installation section 2 is provided with a liquid collection tank 2 provided on a trolley 36 for temporarily storing the liquid collected on the tray 7.
4, a high-pressure pump 25 for supplying the cleaning liquid and the cleaning water to the liquid jet nozzle 4, and a high-pressure pump 25 for supplying tap water as the cleaning water.
Tap water supply pipe 26 to be supplied to the suction port 25a, a check valve 27 and a pressure reducing valve 28 interposed in the tap water supply pipe 26.
A cleaning liquid tank 29, a cleaning liquid supply pipe 30 connecting the cleaning liquid tank 29 to the middle of the tap water supply pipe 26, a low pressure pump 31 and an electromagnetic valve 32 interposed in the cleaning liquid supply pipe 30, and a high pressure pump 25. A discharge pipe 33 connected to the discharge port 25b, a solenoid valve 34 interposed in the discharge pipe 33,
Further, an air vent pipe 35 connected to the tap water supply pipe 26,
A solenoid valve 37 interposed in the air vent pipe 35;
Compressor 38 as a source of air not directly mounted on the compressor. Reference numeral 39 denotes an electromagnetic valve interposed in a passage connecting the compressor 38 and the air ejection nozzle 5. The tip of the air vent pipe 35 is opened into the liquid recovery tank 24. The liquid recovery tank 24 is provided with limit switches FS1 and FS2 for detecting the lower limit position and the upper limit position of the recovered liquid. And the limit switches FS1 and FS2 control the injection pump 40 to operate the pump 40 each time the liquid collected in the liquid recovery tank 24 is stored in the liquid recovery tank 24. The recovered liquid was discarded outside. 41 is the truck 3
6 shows a control box provided on one side surface of No. 6.

The motor 17 of the rotation drive unit 6A is controlled using a limit switch LMS1 (b contact) for detecting the rotation position provided on the inner peripheral surface of the reinforcing plate 10 and a programmable controller 42, and The motor 20 of the drive unit 6B for vertical movement is provided with a limit switch LMS2 (contact b) for detecting an upward movement position of the support rod 8 provided at a lower part of the tray 7, or a waterproof limit switch provided at an upper end position of the liquid ejection nozzle 4. The control is performed using the LMS3 (contact b), the lower limit position detection sensor amplifier E3X1, and the programmable controller 42. To explain this, when the operation switch SW1 provided on the terminal line 43a connected to the control board DR1 of the motor 17 of the rotation drive unit 6A is closed, the motor 17 is driven to drive the liquid ejection nozzle 4 and the air ejection nozzle 5, Rotate in the direction of the arrow shown in FIG. When the actuator of the limit switch LMS1 comes into contact with the contactor 44 provided on the inner surface of the reinforcing member 10 by the rotation, the limit switch LMS1 is closed, and a signal is generated on the reverse rotation terminal line 43b via the programmable controller 42 by the signal. The motor 17 is rotated in the reverse direction to rotate the liquid jet nozzle 4 and the air jet nozzle 5 in the reverse direction. When the limit switch LMS1 touches the contact 44 again, the limit switch LMS1 is opened, whereby the motor 17 rotates again in the direction of the arrow. This is repeated alternately. The rotation speed of the motor 17 can be switched by operating a switch SW7 interposed between the terminal wires 43c provided on the control board DR1.

When the operation switch SW2 provided on the terminal wire 45a connected to the control board DR2 is closed, the motor 20 of the vertical movement drive unit 6B rotates in the direction for moving the rack rod 11 upward, and thereby the liquid ejection nozzle 4 and the air ejection nozzle 5 are moved upward.

When the liquid ejection nozzle 4 and the air ejection nozzle 5 reach the upper end positions, when at least one of the limit switches LMS2 or LMS3 (two used for safety) is opened, the relay X1 is excited via the programmable controller 42. Then, the contact X1-1 interposed between the reverse rotation terminal wires 45b is closed. With this, the rack rod 11 moves down,
The ejection nozzle 4 and the air ejection nozzle 5 are moved downward.

When the rack rod 11 reaches the lower end position, it is output from the lower limit position detection sensor amplifier E3X1, and accordingly, the relay X1 is demagnetized via the programmable controller 42 and interposed in the reverse rotation terminal wire 45b. Open the contact X1-1. For this reason, the rotation direction of the motor 20 is switched, and the rack rod 11 moves up again to move the ejection nozzle 4 and the air ejection nozzle 5 upward. The lower limit position detection sensor amplifier E3X1 is linked with an optical sensor (not shown), and the optical sensor
The operation is performed by detecting the small hole 46 provided in 1. In addition,
When the cleaning liquid is ejected obliquely downward by inclining the liquid ejection nozzle 4, the downward movement speed with respect to the finned heat exchanger C is accelerated by the amount of the inclination of the liquid ejection nozzle 4.
In order to prevent this, a speed switching amplifier E3X2 that operates when the liquid ejection nozzle 4 is tilted is provided. When the speed switching amplifier E3X2 operates, the relay X2 is excited, and the control substrate DR2 is used to reduce the rotational speed. By switching the contact X2-1 interposed in the terminal wire 45c, the motor 20
The speed of rotation was reduced. The speed switching amplifier E3X2 is linked with an optical sensor (not shown), and the optical sensor is connected to the small hole 46 provided in the rack rod 11.
It operates while detecting the slit 47 provided on the plane orthogonal to (shown in FIG. 6).

In this manner, the cleaning liquid is first sprayed from the liquid discharging nozzle 4 onto the heat exchanger C with fins while the liquid discharging nozzle 4 and the air discharging nozzle 5 rotate and move up and down about the vertical axis. After that, the washing liquid is then sprayed to wash off the washing liquid, and then the air is sprayed to drain the liquid. When the washing liquid and the washing water are sprayed, and when the air jet nozzle 5 moves upward, Air was also blown from the air jet nozzle 5.

This will be described below with reference to the control circuit shown in FIG. Prior to use, the tap water supply pipe 26 is connected to a water source (faucet) via an external hose (not shown), and then the switch SW5 is closed for a certain time to release air.
By opening an electromagnetic valve 36 interposed in the feed pipe 35 and passing water through the tap water supply pipe 26, air remaining in an external hose or the like is removed.

After that, the switch SW6 is closed to excite the relay X5 via the programmable controller 42, and the contact X5-1 is interposed in the operation circuit of the compressor 38.
Is closed to activate the compressor 38, the switch SW4 is closed, the relay X3 is excited, and the contact X3-1 interposed in the operation circuit of the low-pressure pump 31 is closed. As a result, the low-pressure pump 31 is activated, and the solenoid valve 32 is
Is opened, whereby the cleaning liquid can be supplied from the cleaning liquid tank 29 from the liquid ejection nozzle 4.

When the switch SW3 is closed, the relay WP is excited and the contact W
Close P-1. As a result, the high-pressure pump 25 is turned on, the solenoid valve 34 is opened via the programmable controller 42, and the liquid jet nozzle 4 heats the heat exchange with fins when diluted with the washing water (tap water) supplied from the washing liquid tank 29. Spray on vessel C. At this time, the programmable controller 42 makes the determination shown in the flowchart of FIG. 11, and only when the liquid ejection nozzle 4 and the air ejection nozzle 5 move upward, the compressor 38
By opening the electromagnetic valve 39 interposed in the passage connecting the air jet nozzle 5 and the air jet nozzle 5, air is blown from the air jet nozzle 5 to the heat exchanger C with fins. As a result, the cleaning liquid sprayed on the finned heat exchanger C is pushed up in the upward direction of the finned heat exchanger C, and is further spread to the opposite side of the finned heat exchanger C from the liquid ejection nozzle 4 by the air flow. As a result, the residence time of the cleaning liquid in the finned heat exchanger C can be lengthened, and the cleaning liquid can be spread to the back side of the heat medium liquid circulation pipe C2 provided in the finned heat exchanger C. C1 can be evenly spread, and the cleaning liquid can be spread to the inner peripheral surface of the housing 8. Then, when the switch SW4 is opened, the relay X3
De-energizes and opens the contact X3-1 interposed in the operation circuit of the low-pressure pump 31. As a result, the low-pressure pump 31 stops, and the solenoid valve 32 is closed via the programmable controller 42. As a result, the supply of the cleaning liquid is cut off, and only the cleaning water is similarly blown from the liquid ejection nozzle 4 to the finned heat exchanger C, thereby washing away the cleaning liquid in the finned heat exchanger C. Thereafter, when the switch SW3 is opened, the relay WP is demagnetized and the contact WP-1 interposed in the operation circuit of the high-pressure pump 33 is opened. Thereby, the high pressure pump 2
5 stops the operation and closes the electromagnetic valve 34 via the programmable controller 42 to stop the ejection of the washing water from the liquid ejection nozzle 4. When the operation of opening the switch SW3 is performed, the programmable controller 42 makes the determination shown in the flowchart of FIG.
Only when the air ejection nozzle 5 moves down, the electromagnetic valve 39 interposed in the passage connecting the compressor 38 and the air ejection nozzle 5 is opened, and the air is blown from the air ejection nozzle 5 to the heat exchanger C with fins. . Thus, the washing water adhering to the finned heat exchanger C can be blown off while the washing water adhering to the finned heat exchanger C is pushed down by the air.

When the limit switch FS1 for detecting the upper limit position of the recovered liquid is closed, the pump 40 is connected to the relay X via the programmable controller 42.
4 is a contact X4 which is excited and intervenes in the operation circuit of the pump 40.
When the limit switch FS2 is closed, the relay X4 is demagnetized via the programmable controller 42, and the pump 40 is deactivated.
Open the contact intervened in the operation circuit of and stop. In addition,
In FIG. 10, SW8 is an emergency stop switch, SW9 is a push button switch interposed in the rotation starting limit switch LMS1, and the motor 17 is stopped at an arbitrary position by pressing the push button switch SW9. I can do it. The switches SW1 to SW8 and switch SW9 is a switch of push-button, provided these on the upper surface of the control box 4 1 mentioned above.
In the above-described embodiment, the air is jetted from the liquid jet nozzle 4 when jetting the cleaning liquid and when jetting the cleaning water. However, this is so that the air is jetted only when jetting the cleaning liquid. You may do it.

[0026]

According to the first aspect of the invention, when the cleaning liquid ejected from the liquid ejection nozzle is ejected, the cleaning liquid can be pushed up by the air ejected from the air ejection nozzle, and the cleaning liquid can be applied to the fins. While the residence time can be lengthened, the cleaning liquid can be spread to the fin surface on the side opposite to the side facing the nozzle,
Further, the cleaning liquid can be spread to the inner surface of the housing outside the finned heat exchanger, and the cleaning effect can be enhanced.

[0027] When according to the invention of claim 2, nozzle
The air flow emitted from the nozzle has a width in the nozzle rotation direction.
To be able to Taseru, the more effectively cleaning liquid sprayed into the heat exchanger finned, can be Watarura-out fin surface or in line between the nozzle and the opposing sides opposite further finned
The cleaning liquid can spread to the inner surface of the housing outside the heat exchanger.

[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 example of an embodiment of the present invention.

FIG. 4 is a plan view cut along the line VI-VI of FIG. 3;

FIG. 5 is a plan view cut along the line VV of FIG. 3;

FIG. 6 is a perspective view of a part of a rack rod.

FIG. 7 is a perspective view of an air injection nozzle.

FIG. 8 is a side view of the floor placing unit.

FIG. 9 is a supply circuit diagram of a cleaning liquid and cleaning water.

FIG. 10 is a control circuit diagram.

FIG. 11 is a flowchart showing a part of control by a program controller;

[Explanation of symbols]

1 Ceiling installation part 2 Floor installation part
3 Installation means 4 Liquid ejection nozzle 5 Air ejection nozzle
6 Drive

Claims (2)

(57) [Claims] 1. A liquid jet nozzle for spraying a cleaning liquid and then a cleaning water toward a substantially annular finned heat exchanger provided in a housing having a lower surface opened, and a cleaning sprayed on the finned heat exchanger. A ceiling-mounted air conditioner including an air ejection nozzle for ejecting air for blowing off water, wherein the liquid ejection nozzle and the air ejection nozzle are vertically moved and rotated about a vertical axis by a driving device. In the heat exchanger cleaning device of (1), the air ejection nozzle ejects liquid.
Disposed below the nozzle, and least when even jetting the cleaning liquid from the liquid ejection nozzle, the ceiling-mounted air, characterized in that from the air ejection nozzles only during upward movement of the air jet nozzle so as to inject air Conditioner heat exchanger cleaning equipment. 2. The apparatus for cleaning a heat exchanger of a ceiling-mounted air conditioner according to claim 1, wherein said air ejection nozzle has a width in a rotating direction thereof.