JP3319924B2 - Simple cleaning equipment for air conditioners - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for cleaning a heat exchanger contaminated with oil smoke or the like of a ceiling-mounted air conditioner of a type in which an indoor unit is installed above a ceiling or vertically suspended from a ceiling using a detergent solution. The present invention relates to a simple cleaning device for an air conditioner to perform the cleaning.

[0002]

2. Description of the Related Art A ceiling-mounted air conditioner in which an indoor unit of an air conditioner is installed on a ceiling is particularly suitable for offices and restaurants from the viewpoint of improving heat exchange efficiency and effectively utilizing indoor floor surfaces. Suitable. However, in these places, it is necessary to frequently clean the oil and smoke generated by smoking and cooking, since the oil and smoke adhere to the heat exchanger and the heat exchange function is rapidly deteriorated. This oily stain cannot be removed without using a detergent solution. However, using a scourer or a rag to wipe off dirt would be a high-altitude operation and would not be very efficient.

Therefore, as shown in FIG. 13, a method of spraying a detergent liquid to a heat exchanger using an injection nozzle is used for a ceiling-mounted air conditioner. In this method, a ventilation panel, a ventilation fan, and the like (not shown) provided on the ceiling surface are removed, and a funnel-shaped washing liquid receiving vessel 102 made of a transparent vinyl sheet is formed so as to surround the outer periphery of the indoor unit casing 101. And a jet nozzle 104 for the detergent and the washing water is inserted through a hollow 103 provided on a side surface of the washing solution receiver 102. 105 in the figure is a detergent reservoir, 1
Reference numeral 06 denotes a suction pump, and 107 denotes a suction hose having the injection nozzle 104 attached to the tip. The washing liquid dripping from the heat exchanger passes through the washing liquid receiver 102 and the drain hose 108, and the washing liquid 1
Collected in 09. Japanese Patent Application Laid-Open No. 4-306496 discloses a cleaning unit in which a discharge nozzle and a suction nozzle for cleaning liquid (and air) are combined in an arrangement sandwiching a heat exchanger.
A technique of reciprocating left and right along a heat exchanger while holding it by hand is disclosed.

[0004] However, although the method of spraying the detergent liquid from the spray nozzle inserted into the bore of the above-mentioned washing liquid receiver is far better than the method of wiping with a rag, it involves the danger of working at heights. It also requires considerable effort. These difficulties are:
This is common to the apparatus disclosed in Japanese Patent Application Laid-Open No. 4-306496, in which the cleaning unit is reciprocated while the operator holds the cleaning unit in his hand.

Therefore, the applicant of the present application turned the injection nozzle, which was temporarily installed at the location where the ventilation fan was removed, while facing the inner peripheral surface of the heat exchanger, so that the heat could be completely automatically cleaned. Developed a washing device for exchangers, and first described in Japanese Patent Application Nos. 5-26998 and 5-26.
9699 ". The device of the invention of the prior application was created for an indoor unit having a structure in which a heat exchanger is arranged so as to surround a ventilation fan.

[0006]

However, the arrangement of the heat exchanger is not limited to the above, and two heat exchangers in the form of a rectangular panel are opposed to each other with a fan interposed therebetween. In some cases, the heat exchanger faces the fan in an appropriate arrangement. With respect to this type of air conditioner, the above-mentioned prior-art invention device cannot satisfactorily achieve its excellent cleaning performance. Accordingly, the present applicant has devised a newer type of automatic air conditioner washing apparatus suitable for a structure in which one or more heat exchangers having a rectangular panel shape are opposed to a ventilation fan. A patent application has been filed as “Japanese Patent Application No. 7-55479”.

The general structure of the apparatus of the prior application is as follows. A guide rail is detachably provided between opposed side walls of a casing of an indoor unit, and the apparatus main body in which a cleaning nozzle and reciprocating means are incorporated is attached to the guide body. While reciprocating while being straddled on the rail, the pressurized cleaning liquid is supplied to the cleaning nozzle, and the heat exchanger is automatically cleaned. Therefore, there is room for further improvement in the point that the structure becomes slightly complicated.
Therefore, an object of the present invention is to provide a simple cleaning device for an air conditioner that is excellent in cleaning efficiency and work safety while simplifying the structure as much as possible based on the experience of a series of product development as described above. .

[0008]

In order to achieve the above-mentioned object, a simple cleaning device for an air conditioner according to the present invention comprises a main body having a pipe 1 of a predetermined length with both ends closed, and a suitable length in the longitudinal direction. A pipe-shaped nozzle A having a jet port 2 provided at an interval, and a liquid supply port 6 for supplying a pressurized cleaning liquid into the pipe 1, a pipe-shaped nozzle A, With the arrangement facing the heat exchanger 100, the casing 2
01 and a pressurized cleaning liquid supply means. And the pipe 1
Is preferably in the shape of a rectangular tube, and the jet port 2 is provided at the ridge. The pipe 1 may be formed by adding a plurality of pipes so that the length can be changed.

The straddling member B is connected to the casing 20.
A plurality of pillars 21 extending along one side wall at a predetermined interval
And a clamp member 2 for holding the lower edge of the side wall of the casing
2, a connecting means for connecting the member to the support 21, a metal fitting 23 which is vertically movably assembled to the support 21, and is screwed and fixed at an arbitrary height position, and one end of the metal fitting 23 to the metal fitting 23. The horizontal arm 24 is preferably fixed to the horizontal arm 24 and a clamp 25 for gripping the pipe-shaped nozzle A is provided.
The straddling member B may be configured so that a plurality of the pipe-shaped nozzles A can be straddled in parallel at a predetermined interval.

Further, the pipe-shaped nozzle A is provided with a cleaning nozzle 52 for injecting a cleaning liquid toward the heat exchanger, and also serves as a guide rail by an attached reciprocating means.
A cleaning unit having an apparatus main body 50 that can reciprocate along the pipe 1 may be attached and the pressurized cleaning liquid may be supplied to the cleaning nozzle 52.

[0011]

[Action] Prior to installing the simple cleaning device in the indoor unit,
A member that hinders washing, such as a vent panel, a drain pan, and a ventilation fan motor, is removed and placed in advance. And
As shown in FIGS. 1 and 7, a straddling member B is attached to a side wall facing the heat exchanger 100 among four side walls of the casing. To do this, first, the clamp member 22 connected to the column 21 is clamped by the lower edge of the side wall. next,
The metal fitting 23 mounted vertically on the support column 21 is moved to a height position directly opposite to the heat exchanger 100 and temporarily fixed at this position. Then, the base end side of the horizontal arm 24 to which the gripping clamp 25 is mounted so as to be horizontally movable is fixed to the metal fitting 23 by the connecting means. However, the horizontal arm 24
May be attached to the support 21 in advance.

In this manner, one set of the right and left straddling members B
After the installation of the left and right, as understood from FIG.
The two ends of the pipe 1 of the pipe-shaped nozzle A are held by the set of holding clamps 25, 25, respectively. At that time, spout 2
The height position of the metal receiving member 23 is readjusted so that the right side faces the heat exchanger 100. Finally, if a liquid supply hose (C in FIG. 2) extending from a pressurized cleaning liquid supply means (not shown) is connected to the liquid supply port 6 provided in the pipe-shaped nozzle A, preparation for use of the simple cleaning device is completed. Complete.

Therefore, first, when the pressurized detergent liquid is supplied into the pipe-shaped nozzle A, as shown in FIG. 1, the detergent liquid is ejected from each spout port 2 as if it was ejected from the ejection nozzle. It is injected all at once with a conical spread toward the entire surface of the heat exchanger 100.

[0014] When the oily dirt of the heat exchanger 100 is removed by the detergent liquid, the supply of the detergent liquid is stopped.
Cleaning water is supplied to the pipe-shaped nozzle A to wash off the detergent liquid. Thereafter, if necessary, compressed air is supplied to the pipe-shaped nozzle A, and the heat exchanger 100 to which water droplets adhere is dried by the blast from the injection port 2 to complete a series of cleaning operations.

Next, as shown in FIG. 12, the apparatus main body 50 of the automatic cleaning apparatus for an air conditioner, which was filed by the applicant of the present invention as "Japanese Patent Application No. 7-55479", is attached to a pipe-shaped nozzle A. The operation in the case of being used while mounted on a computer will be described. The apparatus main body 50 is provided with a total of four holding rollers 51 for holding the guide rail. Therefore, the pipe-shaped nozzle A is sandwiched between these roller groups instead of the guide rail. In this case, the liquid supply hose is not connected to the pipe-shaped nozzle A, and the liquid supply joint 53 of the cleaning nozzle 52 is connected.
To be connected. When the holding roller 51 is rotated forward / reverse by the attached motor, the apparatus main body 50 reciprocates along the pipe-shaped nozzle A with a predetermined stroke. The cleaning liquid is sprayed toward the heat exchanger 100. 54 is a stopper for setting a stroke. If necessary, more detailed cleaning can be performed by using the apparatus main body 50.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. FIG. 1 shows a state in which a simple cleaning device is mounted in a casing 201 of an indoor unit 200 of an embedded ceiling air conditioner. 100 in the figure
Is a panel-shaped heat exchanger, A is a pipe-shaped nozzle, B is a member for straddling the pipe-shaped nozzle A, and C is a liquid supply hose, which extends from a pressurized cleaning liquid supply means (not shown). In this figure, the ventilation fan incorporated in the casing 201 and other members that hinder the cleaning operation have been removed in advance. 300 is a ceiling. Although not shown, a washing liquid receiver or the like for collecting washing waste liquid is disposed below the casing 201 in the same manner as in the related art.

The pipe-shaped nozzle A of this embodiment shown in FIGS. 1 to 6 has a square tubular pipe 1 as a main body.
As shown in FIGS. 2 and 4 and 5, one of the four ridges of the pipe 1 is provided with a jet port 2 for jetting a cleaning liquid at a plurality of locations spaced at appropriate intervals. I have.

As shown in FIGS. 2 and 3, a proximal stopper 3 is inserted into the proximal end of the pipe 1 and fixed with a screw a. The proximal stopper 3 is an insertion portion 3 that is inserted into the pipe 1.
A, and a joint 3B connected to the base end thereof. The insertion portion 3A has a liquid passage 4, which penetrates a shaft center portion, a screw hole b into which a screw a is screwed, and a liquid-tight passage. A packing groove c is provided. The joint 3 </ b> B is provided with a communication hole 5 communicating with the liquid passage 4, and a liquid supply port 6 is provided at a base end of the communication hole 5. A hose joint 7 for connecting a liquid supply hose C is attached to the liquid supply port 6 downward.

As shown in FIG. 2, a distal end stopper 8 is fitted to the distal end of the rectangular pipe 1 and is prevented from coming off by a screw a. The stopper plugs 3 and 8 on the base end side and the distal end side are provided with liquid passages communicating with the spout 2 provided in the pipe 1 so that the cleaning liquid can be sprayed from near both ends of the pipe 1. I have.

Reference numeral 9 shown in FIGS. 4 and 6 denotes an extension joint of the pipe 1, and a plurality of pipes 1 are added according to the size of the heat exchanger 100 to change the length of the pipe-shaped nozzle A. I am trying to be. A liquid passage 10 is provided in the axial center portion of the extension joint 9 in a penetrating manner, and a screw hole b into which a fixing screw a is screwed and a packing groove c for liquid tightness are provided on the outer peripheral surface.

Next, FIG. 7 to FIG.
The structure of the straddling member B for detachably straddling the inside of the casing 201 with the arrangement in which each jet port 2 faces the heat exchanger 100 is shown. As shown in FIGS. 1 and 7, the straddling member B includes two columns 21 that are vertically arranged at predetermined intervals on a casing side wall 201 a located opposite to the heat exchanger 100. , Each support 21 is attached to the side wall 20
1a, a clamp 23 mounted on the column 21 movably up and down, a horizontal arm 24 having one end supported by the bracket 23, and a horizontally movable assembly mounted on the horizontal arm 24. And a holding clamp 25 for holding the pipe-shaped nozzle A. 7 is in a state where the horizontal arm 24 is removed.

The rectangular column 21 is provided with a guide groove 21a of a metal fitting 23 in the longitudinal direction on the front side thereof. As shown in FIG. 7, the clamp member 22 is fixed to the support column 21 by a set screw 26 so as to be vertically movable.
The two clamps 28 shown in FIG. 8 are attached to the left and right ends of the base member 27, respectively, and hold the lower edge of the casing side wall 201a as shown in FIG.
It is composed of The clamp member 28 includes a base member 2 connected to one leg of a U-shaped bracket main body 28a and a tip of a push screw 28b screwed into a screw hole of the other leg.
7, the lower edge is sandwiched.

As shown in FIG. 9, the metal fitting 23 has a shape in which a channel material is bent in an inverted L-shape.
It can be fixed at an arbitrary height position by a set screw 29 loosely fitted to 1a in a retaining state. Reference numeral 30 denotes a reinforcing member.

The horizontal arm 24 has a guide groove 2 on its lower surface.
4a, the base end of which is shown in FIG.
As shown in (1), the fitting 23 is loosely fitted in the groove of the horizontal portion 23B. In order to fix this loose fitting state, a nut member 32 is screwed into a set screw 31 penetrating the bottom surface of the horizontal arm 24 and the groove bottom surface of the receiving member 23.

The holding clamp 25 has the structure shown in FIGS. That is, a movable member 33 having an engagement claw that engages with the guide groove 24a on the lower surface of the horizontal arm 24 and movable along the lower surface is provided.
Gripping member 34 connected to one end of the lower surface of the
, A clamp 35 for fixing the holding member 34 in contact with the lower surface of the movable member 33, and a set screw for stopping the movement of the movable member 33 although not shown in the drawing. Each of the contact surfaces is provided with a V-shaped recess d for holding the rectangular pipe 1 therebetween.

Next, the operation of the above configuration will be described. As shown in FIG. 1, prior to cleaning the heat exchanger 100,
A member that interferes with the cleaning operation, such as a ventilation panel or a ventilation fan on the ceiling surface, is removed and put in advance. And the heat exchanger 10
0, near both side edges of the casing side wall 201a,
As shown in FIGS. 1 and 7, the bridging members B are respectively mounted.

In order to do this, the set screw 26 of the clamp member 22 movably mounted on the column 21 is loosened somewhat, and a pair of clamp fittings 28, 28 is attached to the lower edge of the casing side wall 201a. To be pinched. Thereafter, the column 21 is pushed up, the upper end thereof is pressed against the ceiling surface of the casing 201, and the set screw 26 is tightened, so that the column 21 is firmly fixed along the casing side wall 201a.

Therefore, the metal fitting 23 mounted vertically on the support column 1 is moved to a height position directly opposite to the heat exchanger 100, and is temporarily fixed to this position by a set screw 29. Then, the base end side of the horizontal arm 24 to which the gripping clamp 25 is mounted so as to be horizontally movable is fixed to the metal fitting 23 by the set screw 31.
To be fixed. However, the metal fitting 23 to which the horizontal arm 24 has been attached may be attached to the support 21 in advance.

In this manner, a pair of left and right members B
After the installation of the left and right, as understood from FIG.
The two ends of the pipe 1 of the pipe-shaped nozzle A are held by the set of holding clamps 25, 25, respectively. At that time, spout 2
The height position of the metal receiving member 23 is readjusted so that is directly opposed to the heat exchanger 100. Then, by connecting the liquid supply hose C extending from the pressurized cleaning liquid supply means (not shown) to the hose joint 7 of the pipe-shaped nozzle A, the preparation for using the simple cleaning device is completed.

Then, when the pressurized detergent liquid is supplied into the pipe-shaped nozzle A, each of the jet ports 2 is selected from the ridges of the rectangular tubular pipe 1, and the jet port 2 ends. As shown in FIG. 1, the cleaning liquid is sprayed over the entire surface of the heat exchanger 100 with a conical spread toward the heat exchanger 100 as if it was sprayed from the spray nozzle. Is done.

When the oily stain on the heat exchanger 100 is removed by the detergent liquid, the supply of the detergent liquid is stopped, and subsequently,
Cleaning water is supplied to the pipe-shaped nozzle A to wash off the detergent liquid. Thereafter, if necessary, compressed air is fed into the pipe-shaped nozzle A to dry the heat exchanger 100 with the water droplets attached thereto, thereby completing a series of washing operations.

FIG. 12 shows that the applicant of the present application has previously described “Japanese Patent Application No.
The operation of the embodiment in which the apparatus main body 50 of the automatic cleaning apparatus for an air conditioner, which is applied for a patent as "-55479", is mounted on a pipe-shaped nozzle A as an alternative to the guide rail for reciprocating movement thereof will be described. ing.

In the apparatus main body 50, the guide rail (pipe-shaped nozzle A) is held by a group of four holding rollers 51 mounted on the casing, and the holding rollers 51 are rotated forward and reverse by an attached motor. Thereby, the apparatus main body 50 is reciprocated at a predetermined stroke along the guide rail, and during this time, the cleaning liquid is sprayed from the attached cleaning nozzle 52 toward the rectangular panel-shaped heat exchanger. In this case, the liquid supply hose C may be connected to the liquid supply joint 53 of the cleaning nozzle 52 without being connected to the pipe-shaped nozzle A. If necessary, finer cleaning can be performed by using the apparatus main body 50.

Incidentally, the object of the present invention can be achieved even if the detailed structure of the above configuration is appropriately changed. For example, in the case of an indoor unit of a type in which two heat exchangers 100 are arranged opposite to each other, of the four ridges of the pipe 1, the jet ports 2 are respectively provided on two opposite ridges. May be provided so that the two heat exchangers can be washed at the same time. In addition, pipe-shaped nozzle A
May be made of a round pipe. In this case, the injection port 2 may be formed in a conical shape, or may be rotatable around the axis of the pipe so that the injection direction is variable.

Further, the number of the pipe-shaped nozzles A provided on the bridging member B is not limited to one, and a plurality of pipe-shaped nozzles may be provided in parallel according to the arrangement and size of the heat exchanger 100. it can. That is, two or more metal fittings 23 may be attached to the column 21, or a plurality of gripping clamps 25 may be attached to the horizontal arm 24.

[0036]

As is apparent from the above description, the simple cleaning device for an air conditioner according to the present invention has various excellent effects as listed below. (A) Since automatic cleaning is possible, it is free from conventional dangerous and difficult cleaning work at a high place. (B) Even an inexperienced person in the washing operation can quickly and surely wash. (C) Since the structure is extremely simple, a compact device can be manufactured at low cost. (D) The pipe-shaped nozzle and the member for straddling the pipe-shaped nozzle can be attached to and detached from the casing of the indoor unit by almost one-touch operation. (E) Two or more pipe-shaped nozzles can be attached to the straddling member in parallel according to the type and capacity of the indoor unit, and the length of the pipe-shaped nozzle is variable. It is convenient because it can be shared by various types of indoor units. (F) Thereby, the operation rate of the cleaning device can be increased,
It is much more economical than conventional ones.

[Brief description of the drawings]

FIG. 1 shows an embodiment of the present invention, and is a sketch of a use state of a cleaning device.

FIG. 2 is a partial vertical sectional front view of the pipe-shaped nozzle.

FIG. 3 is a partial vertical sectional front view of a proximal stopper of the pipe according to the first embodiment;

FIG. 4 is a front view showing a state where an extension joint is fitted to a tip of the pipe.

FIG. 5 is a vertical sectional view taken along the line XX in FIG. 4;

FIG. 6 is a longitudinal sectional view of the extension joint.

FIG. 7 is a front view of the indoor unit with a straddling member attached to a casing side wall of the indoor unit.

FIG. 8 is a perspective view of the same as above.

FIG. 9 is a perspective view showing an essential part of the straddling member.

FIG. 10 is a front view showing the metal fitting.

FIG. 11 is a front view showing the same clamping clamp.

FIG. 12 is an explanatory view showing an embodiment in which a pipe-shaped nozzle is used as a substitute for the guide rail of the apparatus main body of the apparatus of the prior application by the present applicant.

FIG. 13 is an explanatory diagram of a conventional example.

[Explanation of symbols]

 REFERENCE SIGNS LIST 100 Heat exchanger 200 Indoor unit 201 Casing 201a Casing side wall 300 Ceiling surface A Pipe-shaped nozzle B Straddling member C Liquid supply hose 1 Pipe 2 Spray port 3 Base end stopper 3A Insertion fitting 3B Joint 4 Liquid flow Road 5 Communication hole 6 Liquid supply port 7 Hose joint 8 End side stopper 9 Extension joint 10 Liquid passage port 21 Prop 21a, 24a Guide groove 22 Clamp member 23 Metal fitting 23A Vertical part 23B Horizontal part 24 Horizontal arm 25 Clamp for grip 26 set screw, 29, 31 27 base member 28 clamp fitting 28a fitting body 28b push screw 28c pressure plate 32 nut member 33 movable member 34 gripping member 35 clamp 50 device body 51 holding roller 52 cleaning nozzle

──────────────────────────────────────────────────の Continuing on the front page (72) Inventor Futa Kawamura 390 Muramatsu, Shimizu-shi, Shizuoka Prefecture Air Conditioning Systems Division, Hitachi, Ltd. (72) Inventor Munehiro 1 Aichi-cho, Kasugai-shi, Aichi Aichi Electric (72) Inventor Minoru Sugino 1 Aichi-cho, Kasugai-shi, Aichi Pref. Aichi Electric Co., Ltd. (56) References JP-A-6-123437 (JP, A) JP-A-8-296993 (JP, A) (58) Field surveyed (Int. Cl. ⁷ , DB name) F28G 9/00 F24F 1/00 391

Claims (6)

(57) [Claims] 1. A pipe 1 having a predetermined length with both ends closed, having a main body, a jet port 2 provided at an appropriate interval in a longitudinal direction thereof, and a liquid supply for supplying a pressurized cleaning liquid into the pipe 1. A pipe-shaped nozzle A having a mouth 6, and a straddle for detachably straddling the pipe-shaped nozzle A in a casing 201 of the indoor unit with an arrangement in which each jet port 2 faces the heat exchanger 100. A simple cleaning device for an air conditioner, comprising a member for use B and a pressurized cleaning liquid supply means. 2. The simple cleaning device for an air conditioner according to claim 1, wherein said pipe 1 has a rectangular cylindrical shape, and said jet port 2 is provided at a ridge thereof. 3. The simple cleaning device for an air conditioner according to claim 1, wherein a length of the pipe 1 is variable by adding a plurality of the pipes. 4. The straddling member B includes a plurality of columns 21 extending along a side wall of the casing 201 at a predetermined interval, a clamp member 22 for clamping a lower edge of the side wall of the casing,
A connecting means for connecting the member to the support 21; a metal fitting 23 which is vertically movably mounted to the support 21 and is fixedly screwed at an arbitrary height; and one end of the metal fitting 23 is fixed to the metal fitting 23. Horizontal arm 24
4. The air conditioner according to claim 1, further comprising: a holding clamp 25 that is horizontally movably attached to the horizontal arm 24 and holds the pipe-shaped nozzle A. 5. Simple cleaning device. 5. The straddling member B is configured to be able to straddle a plurality of the pipe-shaped nozzles A in parallel at a predetermined interval. A simple cleaning device for an air conditioner according to any one of the above. 6. A cleaning nozzle 52 for jetting a cleaning liquid toward a heat exchanger, and a reciprocating means provided therewith.
A cleaning unit having an apparatus main body 50 that can reciprocate along the pipe 1 of the pipe-shaped nozzle A also serving as a guide rail is attached, and the pressurized cleaning liquid is supplied to the cleaning nozzle 52. The simple cleaning device for an air conditioner according to claim 1.