JPH051898A - Cleaning method of heat exchanger for air-conditioning machine and device therefor - Google Patents

Abstract

PURPOSE:To prevent the scattering of dust as well as the dropping of water drops, adhered to a heat exchanger, after finishing cleaning by a method wherein the sucking of dust or the cutting of water is effected by inducing air before or after the spraying process of liquid for cleaning the heat exchanger for an air-conditioning machine. CONSTITUTION:A flexible tube 15 is connected to the inside of a hopper 6 or the receiving member of cleaning water before or after washing. The sucking of dust, adhered to the heat exchanger 23, or the cutting of water, adhered to the same, is effected by inducing air through a vacuum pump 2 while employing said tube 15.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and apparatus for cleaning a heat exchanger in a ceiling-embedded or ceiling-suspended air conditioner (air conditioner).

[0002]

2. Description of the Related Art In a method or apparatus for cleaning a heat exchanger in an air conditioner such as a ceiling-embedded type air conditioner, when cleaning with cleaning water, be careful not to splash the liquid on an office desk or the like below the air conditioner. Work is not easy because the portion to be cleaned is located at a high place near the ceiling surface. Therefore, conventionally, for example, as disclosed in Japanese Utility Model Laid-Open No. 63-129552, cleaning water from a water pump is jetted from a nozzle to a portion to be cleaned of a heat exchanger, and dirty water flowing from the portion to be cleaned is funneled. There is a water receiving member that receives the waste water and collects the received waste water through a hose into a drainage tank. In addition, for example, actual Kaihei 1-75742
As shown in the publication, a funnel-shaped water receiving member (hood) that receives sewage is supported below a heat exchanger to be cleaned by using a support cylinder or a stepladder, and is placed in the water receiving member. There is a nozzle which is provided with a cleaning liquid ejected from the nozzle toward the portion to be cleaned. Then, the filthy water after cleaning is discharged through a drainage pipe connected to the water receiving member.

[0003]

However, the funnel-shaped water receiving member and the drain hose or pipe connected to the water receiving member used in the above-described conventional cleaning method or apparatus are as follows.
It was used exclusively for wastewater recovery. Therefore, if the water receiving member is removed after cleaning, there is a problem that water droplets attached to the heat exchanger fall. Moreover, draining the heat exchanger after washing is performed only by natural drying, which takes time. In addition, you can also wash off rough dust and other particles that adhere to the heat exchanger.
There is a great risk of scattering dust. The present invention solves the above problems, and before or after the spraying process of the cleaning liquid, a flexible hose is connected to the drain port inside the hopper that is the receiving member for the cleaning water, and the hose is By using air suction by vacuum pump operation, dust adhering to the heat exchanger can be sucked or drained, so that it can be washed without scattering dust,
Moreover, even if the hopper is removed after the cleaning work is completed,
An object of the present invention is to provide a heat exchanger cleaning method and device for an air conditioner in which water droplets attached to the heat exchanger do not drop.

[0004]

In order to achieve the above-mentioned object, the invention of claim 1 is the heat of an air conditioner embedded in or suspended from a ceiling surface and having a heat exchanger and a fan housed in a casing. In the method of cleaning the exchanger, attach a hopper to cover the lower surface of the casing of the air conditioner, connect the drain port provided in this hopper to the vacuum pump via the hose and drain recovery tank, and operate this vacuum pump. To suck dust adhering to the heat exchanger before cleaning, and then expose the cleaning liquid tank and the cleaning nozzle connected to the water supply pump via the water supply hose into the hopper, and operate the water supply pump to The cleaning liquid is sprayed from the cleaning nozzle, the vacuum pump is operated, and the sprayed cleaning liquid is collected from the drain port of the hopper into the drainage recovery tank for cleaning. After the end of spraying, the water is removed from the heat exchanger by suctioning air by the operation of the vacuum pump, and the process of sucking dust adhering to the heat exchanger before cleaning or after cleaning In the process of draining the heat exchanger by sucking air, a flexible hose is connected to the drain port in the hopper to perform each work. According to the invention of claim 2, in a cleaning device for cleaning a heat exchanger of an air conditioner which is embedded in or suspended from a ceiling surface and has a heat exchanger and a fan housed in a casing, a vacuum pump and a cleaning liquid are provided. A water feed pump for pressure feeding, and a hopper attached so as to cover the lower surface of the casing of the air conditioner are provided, and a drain port provided in this hopper is connected to the vacuum pump via a hose and a drainage recovery tank, and , A cleaning nozzle facing the hopper is connected to the water supply pump and the cleaning liquid tank via a water supply hose, and a flexible hose is detachably attached to a drain port in the hopper, and the hose is The vacuum pump is used to suck or remove dust adhering to the heat exchanger during operation.

[0005]

According to the above-described cleaning method or apparatus, when the vacuum pump is operated to suck air in the hopper and before or after the cleaning, the flexible hose is connected to the drain port in the hopper. It is possible to perform the work of sucking the dust adhering to the heat exchanger before the cleaning, and the draining work of the heat exchanger after the cleaning.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a system configuration diagram of a cleaning device for a heat exchanger of a ceiling-embedded air conditioner according to this embodiment. In the figure, a cleaning unit 1 which is the main body of this apparatus has a vacuum pump 2 and a water pump 3 for pressure-feeding a chemical liquid or water for cleaning. Separately from the cleaning unit 1, a waste water recovery tank 4 for recovering the waste water after cleaning and a cleaning liquid tank 5 are prepared. Although not shown in FIG. 1, the chemical liquid tank is mounted on the cleaning unit 1. Further, these tanks 4 and 5 may be lightweight synthetic resin tanks.

Further, as a device member, a hopper 6 made of a soft and flexible sheet material such as vinyl chloride for receiving the cleaning water falling from the portion to be cleaned and preventing the water from scattering,
A drain hose 8 for connecting a drain port 7 provided at the lower end of the hopper 6 to the vacuum pump 2 via a drain recovery tank 4.
And a cleaning nozzle 10 which is exposed to the inside of the hopper 6 through an opening / closing opening 9 formed of a waterproof fastener or the like formed in the hopper 6, and a water supply hose 11 which connects the cleaning nozzle 10 to the water supply pump 3. The cleaning liquid tank 5 is connected to the water supply pump 3 by a hose 12, and either the cleaning liquid tank 5 or the chemical liquid tank 5a in the cleaning unit 1 (see FIG. 2) is connected to the water supply pump 3 by switching the solenoid valve. It is designed to be connected. Also,
It is desirable in terms of workability that the hopper 6 is made of a transparent or translucent material.

On the other hand, a heat exchanger 23 and a fan (not shown) are provided in the casing 22 of the air conditioner embedded in the ceiling 21.
Etc. are stored, and the front panel and the like are removed when performing the cleaning work. When performing a cleaning operation, the hopper 6 is attached so as to cover the lower surface of the casing 22. The attachment is detachably attached by using an engaging member 24 such as a velcro tape attached to the opening edge of the hopper 6 and the outer peripheral edge surface of the lower end of the casing 22. Moreover, since the hopper 6 is soft, the hopper 6 can be deformed in accordance with the shape of the outer peripheral edge surface of the lower end of the casing 22 and can be attached while maintaining close contact. Further, the hanging metal fitting 25 having one end of the hopper 6 locked is hung on the hanging bolt 26 of the air conditioner so as not to fall off. A curing sheet 27 may be laid under the air conditioner to be cleaned, if necessary.

FIG. 2 shows the system of the water supply pump 3, the cleaning solution tank 5, and the chemical solution tank 5a, and FIG. 3 shows the system of the vacuum pump 2, the waste water recovery tank 4, and the spare tank 4a. Each of the cleaning liquid tank 5 and the chemical liquid tank 5a has a water supply passage and a residual water passage, and one tank is switched and connected to the pump 3 by opening and closing the electromagnetic valve 28. Also,
A filter 29 is provided at the tip of the water supply side passage. FIG. 4 shows a specific configuration in which a flexible tube (flexible hose) 15 is connected to the inside of the hopper 6 of this device. In this example, a screw-type socket is provided inside the drainage port 7, and the flexible tube 15 is attached to this. Further, a dust removing nozzle and a water draining nozzle may be attached to the tip of the tube 15. Same tube 15
The work of connecting the will be described later.

A cleaning method using the cleaning device having the above structure will be described below. The procedure of the cleaning work is as follows. (1) Remove the front panel, drain pan, fan, motor, control board, etc. of the air conditioner so that the heat exchanger 23 in the casing 22 can be seen. (2) The hopper 6 is attached to the outer peripheral edge of the casing 22 using the engaging member 24 and the hanging metal fitting 25 so as to cover it. (3) Collect dust before cleaning. For this purpose, one end of a drain hose 8 is connected to the drain port 7 of the hopper 6, and the other end of the hose 8 is connected to the vacuum pump 2 of the cleaning unit 1 via the drain recovery tank 4. Then, the vacuum pump 2 is operated to suck air from the tip of the drain hose 8, and the hopper 6
Absorb the dust and dirt inside. At this time, a part of the openable and closable opening 9 such as a waterproof fastener of the hopper 6 is opened, and the operator inserts his / her hand into the inside of the drainage port 7 of the hopper 6 so as to be flexible as shown in FIG. If the tubes 15 are connected and the flexible tube 15 is held to absorb dust and the like adhering to the heat exchanger 23, work can be performed efficiently.

(4) Cleaning with a chemical solution is performed. It has
A cleaning nozzle 10 is connected to the other end of a water supply hose 11 whose one end is connected to the water supply pump 3 of the cleaning unit 1. An operator holds the cleaning nozzle 10 in his hand and opens the hopper 6 through an opening / closing opening 9 of the hopper 6. Show inside. The water supply pump 3 is operated, the chemical solution is pressure-fed from the chemical solution tank 5a, sprayed from the cleaning nozzle 10 to the heat exchanger 23, and the chemical solution is permeated. (5) Wash off the chemical solution by washing with water. To do this, the solenoid valve 28 is switched, and the cleaning water is pumped from the cleaning liquid tank 5 by the water pump 3, and the cleaning nozzle 10 to the heat exchanger 2 is supplied.
Inject to 3. The drainage of the chemical solution and the washing water is sucked by the vacuum pump 2 from the drainage port 7 of the hopper 6, and the drainage hose 8
And is sent to the waste water recovery tank 4 for recovery. (6) Drain the water attached to the heat exchanger 23. This is performed by sucking air in the hopper 6 with the vacuum pump 2. Here, as in (3) above, the flexible tube 15 is placed inside the drainage port 7 of the hopper 6.
It is efficient to connect them. (7) Finally, the hopper 6 is removed, and the removed parts of the air conditioner are restored to complete a series of cleaning operations.

[0012]

As described above, according to the cleaning method or apparatus of the present invention, a flexible hose is connected to the drain port inside the hopper before or after the spraying process of the cleaning liquid, and this hose is connected. It is possible to use suction air to suck the dust adhering to the heat exchanger, or to drain water.Therefore, there is no risk of scattering dust, and after the cleaning work is completed, the hopper is removed. Even if it is removed, the water droplets attached to the heat exchanger will not drop. Further, the flexible hose is detachable, so that it can be removed when washing with water or a chemical, and it does not get in the way.

[Brief description of drawings]

FIG. 1 is a system configuration diagram of a heat exchanger cleaning device for an air conditioner according to this embodiment.

FIG. 2 is a system diagram of a water supply pump unit of the cleaning device.

FIG. 3 is a system diagram of a vacuum pump unit of the present cleaning device.

FIG. 4 is a specific configuration diagram when a hose is connected inside the hopper of the cleaning device.

[Explanation of symbols]

2 vacuum pump 3 water pump 4 Wastewater recovery tank 5 Cleaning liquid tank 6 hopper 7 drain 8 drainage hose 10 Washing nozzle 12 hoses 15 Flexible tube (flexible hose) 22 Air conditioner casing 23 heat exchanger

Continued front page    (72) Inventor Shoji Nakagami             2-4-12 Nakazaki-nishi, Kita-ku, Osaka             Center Building Daikin Industries, Ltd. (72) Inventor Masakazu Hirano             Kurita, 3-4-7 Nishi-Shinjuku, Shinjuku-ku, Tokyo             Industry Co., Ltd.

Claims (2)

[Claims] 1. It is embedded in or suspended from a ceiling surface,
In the method of cleaning the heat exchanger of an air conditioner in which a heat exchanger and a fan are housed in the casing, a hopper is attached so as to cover the lower surface of the casing of the air conditioner, and the drain port provided in this hopper is connected to a hose and waste water recovery. A cleaning nozzle that is connected to a vacuum pump via a tank, operates this vacuum pump to suck the dust adhering to the heat exchanger before cleaning, and then connects it to the cleaning liquid tank and water pump via the water supply hose. Facing the inside of the hopper, operating the water supply pump to spray the cleaning liquid from the cleaning nozzle, and operating the vacuum pump to recover the sprayed cleaning liquid from the drain port of the hopper to the waste water recovery tank. After the cleaning liquid has been sprayed, the heat exchanger is drained by sucking air by the operation of the vacuum pump. In the process of suctioning dust adhering to the heat exchanger or draining the heat exchanger by suctioning air after washing, each work by connecting a flexible hose to its drain in the hopper A heat exchanger cleaning method for an air conditioner, which is characterized by performing 2. Embedded or suspended on the ceiling surface,
In a cleaning device for cleaning a heat exchanger of an air conditioner in which a heat exchanger and a fan are housed in a casing, a vacuum pump, a water pump for pumping a cleaning liquid, and a casing so as to cover the lower surface of the casing of the air conditioner. And a drainage port provided in the hopper is connected to the vacuum pump via a hose and a drainage recovery tank, and further, a cleaning nozzle facing the inside of the hopper is fed through the water supply hose to the water feed pump and It is connected to a cleaning liquid tank, and a flexible hose is removably attached to the drain port in the hopper, and the hose is used for suctioning or draining dust adhering to the heat exchanger during operation of the vacuum pump. A heat exchanger cleaning device for an air conditioner, which is characterized in that it is used for performing.