JP2007218496A - Washing device for heat exchanger of ceiling mounted air conditioner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a washing device capable of enhancing a washing effect by directly spraying a wash fluid from a liquid injection nozzle to both side surfaces of all of multiple heat medium circulators and both sides of all of multiple fins which are alternately disposed in a heat exchanger of a ceiling mounted air conditioner. <P>SOLUTION: In the washing device for the heat exchanger C comprising a number of heat medium circulating pipes C1 and a number of fins C2 alternately disposed in the vertical direction and the horizontal direction of the ceiling mounted air conditioner A, adapted to spray the wash fluid to the heat exchanger from the liquid injection nozzle 5 moving along the heat exchanger, the injection nozzle 5 repeats upward and downward swinging during its rising and lowering movement along the heat exchanger C. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention mainly relates to a heat exchanger cleaning device for a ceiling-mounted air conditioner that is attached to a ceiling of an office room, a game room, a coffee shop, or the like.

Conventionally, as a cleaning device for a heat exchanger of this kind of ceiling-mounted air conditioner, for example, in JP-A-8-247696, as shown in FIGS. An apparatus is disclosed in which cleaning liquid is sprayed and cleaned toward the heat exchanger while reciprocating a liquid spray nozzle along the longitudinal direction of a rectangular panel heat exchanger disposed along the opposite side wall. In addition, in JP-A-8-296993 and JP-A-10-89892 previously disclosed by the applicant of the present application, the inner circumference of a substantially annular heat exchanger provided in a casing having an open bottom surface of a ceiling-mounted air conditioner A liquid injection nozzle communicating with a liquid supply pipe that is movable up and down and rotatable about a vertical axis is exposed in a space surrounded by a surface, and the liquid injection nozzle is moved up and down and rotated about a vertical axis. In addition, a cleaning device is disclosed in which a cleaning liquid is sprayed and cleaned from the jet nozzle toward the heat exchanger while being moved along the surface of the annular heat exchanger. In order to enhance the cleaning effect of the lower part of the substantially annular heat exchanger, the liquid injection nozzle held in the horizontal state by the coil spring damper swings downward from the horizontal state only when it approaches the lower end position (swinging) Cleaning) It disclosed the invention of the location.
JP-A-8-247696 JP-A-8-296993 Japanese Patent Laid-Open No. 10-89892

However, all of the liquid injection nozzles of the cleaning device according to the invention of Patent Document 1 are fixed to the nozzle mounting tube in a horizontal state. Accordingly, a large number of heat medium circulations arranged perpendicular to the vertical and horizontal directions constituting the surface of the panel-like heat exchanger or the substantially annular heat exchanger facing the liquid injection nozzle. The spray liquid sprayed from the liquid spray nozzle can be directly applied to the pipes and countless fins, but directly applied to both side surfaces of these heat medium circulation pipes not facing the liquid spray nozzle or both side surfaces of the fins. Since it was not possible, there was a problem that it was difficult to wash off the adhered material adhering to both side surfaces.
Further, in the cleaning device according to the inventions of Patent Documents 2 and 3, the liquid spray nozzle is held in a horizontal state until the lifting / lowering rod approaches the lower end, and the liquid ejection is performed when the lifting / lowering rod approaches the lower end. The nozzle gradually turns downward, and when the lifting / lowering rod rises from the lower end, the liquid spray nozzle gradually turns upward and returns to the original horizontal state. Therefore, as with the liquid injection nozzle fixed in a horizontal state in Patent Document 1, both sides of all the heat medium circulation pipes arranged orthogonal to each other constituting the main body of the heat exchanger. Since it cannot be applied directly to the surface or both side surfaces of all the fins, there is a disadvantage that it is difficult to remove the adhering material adhered thereto.
An object of the present invention is to solve the problem of the conventional heat exchanger cleaning device for a ceiling-mounted air conditioner.

The heat exchanger cleaning device for a ceiling-mounted air conditioner according to the present invention includes a plurality of heat medium circulation pipes and countless fins arranged orthogonally to each other in the vertical direction and the horizontal direction as described in claim 1. A cleaning device for a heat exchanger of a ceiling-mounted air conditioner in which a cleaning liquid is sprayed toward the heat exchanger from a liquid injection nozzle that moves along the surface of a substantially annular or panel-shaped heat exchanger. While the injection nozzle is repeatedly moved up and down along the heat exchanger, the upward and downward swinging is repeated.
Further, according to the present invention, in the above invention, as described in claim 2, the swinging means of the liquid jet nozzle connects the liquid jet nozzle to a liquid supply pipe via a rotary joint, and the rotary pipe joint Is reversely moved by a driving device.
Furthermore, the present invention provides a secondary liquid supply pipe connected to the liquid supply pipe as described in claim 3 in the above invention, and the upper end of the secondary liquid supply pipe is directed upward and downward via a rotary fitting. A sub-liquid spray nozzle that can swing freely is provided.
Further, according to the present invention, a hand-held cleaning device for a heat exchanger of a ceiling-mounted air conditioner is provided with a liquid injection nozzle at the end of a long liquid passage pipe via a rotary pipe joint as described in claim 4. , An air cylinder is provided at the side of the base of the fluid pipe, and a long continuous pipe extending along the fluid pipe is provided at the tip of the piston rod of the air cylinder. A connecting piece projecting from the rotary pipe joint is connected via a rod having a rotary joint portion, and the liquid injection nozzle can be swung freely by the operation of the air cylinder.

According to the invention described in claim 1, among the numerous heat medium circulation pipes and countless fins that are arranged orthogonal to each other that constitute the main body of the heat exchanger, the swinging is repeated upward and downward. The cleaning liquid sprayed from the liquid spray nozzle can be sprayed directly on the front surface of each heat medium circulation pipe or each fin oriented in a direction orthogonal to the swinging direction of the liquid spray nozzle. However, it is possible to spray directly on both side surfaces thereof, and thereby, the adhered matter adhering to both side surfaces can be directly peeled off, and the cleaning effect can be enhanced.
Further, according to the invention described in claim 2, it is possible to give the above-mentioned swinging of the liquid injection nozzle with a simple configuration.
Further, according to the invention described in claim 3, the heat exchanger can be rewashed while the ceiling of the ceiling is repeatedly washed and upward and downward by the liquid injection nozzle.
Further, according to the invention described in claim 4, in the cleaning and spraying the cleaning liquid of the liquid injection nozzle on the front and both sides of these heat medium circulation pipes and countless fins of the heat exchanger of the ceiling-mounted air conditioner, Since it is not necessary for the operator to clean the hand-held cleaning unit by shaking the entire hand-held cleaning unit, physical burden and fatigue can be greatly reduced.

First, a detailed description will be given based on FIGS. 1 to 6 showing an embodiment of the cleaning apparatus of the present invention.
In FIG. 1, A shows a ceiling-mounted air conditioner attached to the ceiling with stay bolts J and J. The air conditioner A includes a casing B having an open bottom surface, a heat exchanger C in the casing B, a blower (not shown) disposed in a central space of the casing B, and an opening of the casing B. And a lid member D for closing the lower surface. The lid member D is provided with an air inlet E at its center and an air outlet F at its four peripheral parts. As shown in FIG. 2, the heat exchanger C includes heat medium circulation pipes C1, C1,... Arranged in a plurality of stages at regular intervals in the vertical direction and orthogonal to these, and in an annular direction. It consists of an infinite number of fins C2, C2,... Arranged at regular intervals.
Before cleaning the heat exchanger C in the air conditioner A, the lid member D and the blower are removed in advance.

The cleaning device of the present invention shown in the figure includes a mounting base 2 installed by each mounting means 1 provided at the front, rear, left and right at the lower part of the casing B of the air conditioner A, and the mounting base 2 has the mounting base 2 A liquid supply pipe 3 is provided that extends in the vertical direction through 2 and is supported so as to face the center of a space surrounded by the substantially annular heat exchanger C.
The liquid supply pipe 3 is placed on the mounting base 2 and moved up and down by the drive device 4 while being rotated around a vertical axis. Accordingly, in conjunction with the operation of the liquid supply pipe 3, the liquid injection nozzle 5 connected to the liquid supply pipe 3 is also moved up and down and rotated. Thus, while the liquid supply pipe 3 moves along the height direction and the annular direction of the annular heat exchanger C, the cleaning liquid and other liquids are sprayed toward the heat exchanger C to cover the entire inner peripheral surface thereof. Perform cleaning.
Reference numeral 6 denotes an annular hopper made of a transparent or translucent material that receives cleaning liquid or other liquid ejected from the liquid ejection nozzle 5 that is detachably attached around the mounting base 2, and 7 denotes the liquid A cart-type floor-mounted unit including a liquid supply / recovery device 8 that supplies a cleaning liquid to the liquid spray nozzle 5 via a supply pipe 3 and recovers the cleaning liquid accumulated on the hopper 6 is shown.
More specifically, the mounting base 2 includes an opening 2a at the center thereof, a rising wall 2b that rises upward around the opening 2a, and a lid 2c that covers the opening 2a from the upper surface. Further, a downward annular peripheral wall 2d fitted to the inner peripheral wall of the hopper 6 is provided in the periphery. Furthermore, a storage space S for the driving device 4 is provided on the lower surface of the mounting base 2 to give the liquid supply pipe 3 and the liquid injection nozzle 5 connected thereto to the up-and-down movement and the rotational movement about the vertical axis. .
Reference numeral 2e denotes a cover provided below the storage space S, and the cover 2e is fastened and fixed to the mounting base 2 together with the outer race 9a of the ball bearing 9.
The driving device 4 includes a rotation driving unit 10 that rotates the liquid supply pipe 3 around a vertical axis, and a lift driving unit 11 that moves the liquid supply pipe 3 up and down.
The rotation drive unit 10 includes an internal gear 12 attached to the lower surface of the outer race 9a of the ball bearing 9 provided in the storage space S below the mount 2, and a support provided on the inner race 9b of the ball bearing 9. The motor 14 supported on the plate 13 and the gear 15 on the rotating shaft of the motor 14 that meshes with the internal gear 12, and the outer race 9a is connected to the mounting base 2 by a plurality of connecting rods 16. The The lid 2c is supported by a plurality of support rods 17 rising from the inner race 9b, and is supported so as to rotate together with the inner race 9b. The ball bearing 9 has a watertight structure.
The lifting / lowering drive unit 11 includes a rack rod 18 connected to the liquid supply pipe 3 by a connecting member 18a, and a motor 19 attached to the support plate 13 that moves the rack rod 18 up and down. Thus, when the rack 19 is moved up and down by the motor 19, the liquid supply nozzle 3 and the liquid injection nozzle 5 are moved up and down along the height direction of the heat exchanger C at a speed of 60 to 80 mm / sec. On the other hand, the liquid injection nozzle 5 was rotated once along the inner peripheral surface of the heat exchanger C by alternately rotating the internal gear 12 clockwise and counterclockwise by the motor 14. Thereafter, the operation of rotating once in the opposite direction was repeated alternately for about 5 to 20 minutes. During this time, the cleaning liquid was sprayed onto the heat exchanger C by the liquid spray nozzle to perform cleaning. In the drawing, reference numeral 20 denotes a distribution board that supplies power via a lead wire 20a to a limit switch LMS that detects the upper limit positions of the motors 14 and 19 provided on the support plate 13.
The hopper 6 is mounted in close contact with the lower end of the casing B by the mounting means 1 mounted on the mounting base 2. The attachment means 1 includes a string-like body 1a, a hook 1b attached to one end of the string-like body 1a for hanging on the stay bolt J, and a free end of the string-like body 1a fixed to the mounting base 2. And a tightening fixture 1c for inserting and fixing.
Further, the lower end of the liquid supply pipe 3 and the drain recovery port 6a provided in the hopper 6 are connected to the liquid supply / recovery device 8 via detachable hoses 21a and 21b, respectively.
Further, the spray liquid pattern of the liquid spray nozzle 5 in the illustrated embodiment is one that gives a conical spray pattern of 10 degrees to 60 degrees, but is not limited to this, and the pattern of the spray liquid May be a liquid jet nozzle that provides a fan-shaped pattern.
The configuration and operation of the above cleaning apparatus are the same as those disclosed in Patent Documents 2 and 3.

  In the cleaning device of the present invention, the liquid injection nozzle 5 that moves up and down along the substantially annular heat exchanger C can be swung in the same direction as the up and down movement, in other words, upward and downward. While the liquid spray nozzle 5 is moved up and down along the height direction of the substantially annular heat exchanger C, the liquid spray nozzle 5 is repeatedly swung as described above, Is directed to all of the multistage heat medium circulation pipes C1, C1,... Oriented in the direction orthogonal to the swing direction or in the direction orthogonal to the swing direction. Not only can the cleaning liquid be sprayed directly on the front of each of a myriad of fins, but also on both sides of each of the fins, so that the adhering material adhering to both sides can be removed. It is a thing.

Next, the vertical swing mechanism of the liquid jet nozzle 5 of the illustrated embodiment will be described in detail.
As shown in FIG. 2 to FIG. 6, a connection pipe 22 directed to the inner peripheral surface side of the heat exchanger C is provided at the upper end of the liquid supply pipe 3, and the air piston cylinder 23 is used to rotate the tip of the connection pipe 22 As the device that attaches the liquid injection nozzle 5 via the pipe joint 24 and drives the rotary pipe joint 24 so as to be swingable in the vertical direction on the side of the connection pipe 22, for example, an air piston cylinder 23 is provided side by side, The cylinder 23a side is supported by the connecting pipe 22 with a connecting piece 25, the tip of the piston 23b of the air piston cylinder 23 is at the tip of the connecting piece 26 protruding from the rotary fitting 24, and the rotary joint part 27a at the end. Is connected via a rod 27, and by rotating the rotary fitting 24 by driving the air piston cylinder 23, the liquid injection nozzle 5 is moved up and down 1 to 30 times in 3 seconds. It was made to swing. Although not shown in the drawing, the rotary joint 24 can be reversed by using a motor capable of rotating in the forward and reverse directions, as the drive device 23, instead of the air piston cylinder.

As can be easily understood from the above, the above-described cleaning device of the present invention includes an infinite number of fins arranged in a horizontal direction orthogonal to the ascending / descending direction of the upward and downward swinging spray nozzles (not shown). The present invention can also be applied to cleaning a substantially annular heat exchanger composed of a large number of heat medium circulation pipes arranged orthogonally to these fins, so that the cleaning liquid can be applied only to the front surface of each of a myriad of fins. However, it can be sprayed directly on both side surfaces, and the cleaning effect can be enhanced.
In addition, although not shown, it is needless to say that the cleaning device provided with the swingable spray nozzle can also be used for cleaning a panel-shaped heat exchanger.

The cleaning device of the present invention uses the liquid injection nozzle 5 as described above, and repeats the up-and-down movement and the rotation as described above along the height direction of the substantially annular heat exchanger C. When the entire inner peripheral surface of the heat exchange C is cleaned, in particular, all of the heat medium circulation pipes C1, C1,... The cleaning liquid is sprayed directly on both side surfaces of the heat exchanger, and further, the sub-cleaning for cleaning the ceiling surface above the heat exchanger C and the heat exchanger C is performed as described below. It was configured to have an apparatus.
This will be described in detail below.

Reference numeral 28 denotes a secondary liquid supply pipe that is provided along with the cleaning liquid supply pipe 3 and rotates together with the cleaning liquid supply pipe 3. The secondary liquid injection nozzle 30 is connected to the upper end of the secondary liquid supply pipe 28 via a rotary fitting 29. Is provided at a position higher than the liquid injection nozzle 5, and the connecting pipe 22 is provided with an air piston cylinder 32 supported by a connecting piece 31 on the cylinder 32a side, and attached to the tip of the piston 32b of the air piston cylinder 32 Further, the rod 33 provided with a rotary joint portion 33a at the end is connected to the connecting piece 34 protruding from the rotary pipe joint 29, and the rotary pipe joint 29 is rotated by the operation of the air piston cylinder 32. The secondary liquid nozzle 30 connected thereto was swung in the vertical direction at an angle of 120 to 130 degrees. The secondary liquid nozzle 30 is used to clean the heat exchanger C from the ceiling surface of the casing B over the heat exchanger C before or after the cleaning of the heat exchanger C by the cleaning liquid injection nozzle 5. To do. As the secondary liquid nozzle 30, one that gives a fan-shaped spray nozzle pattern in which the spray liquid pattern spreads in the vertical direction was used.
In the drawing, 21c is a hose that branches from the hose 21a via a switching valve 8a intervening in the hose 21a led out from the liquid supply and recovery device 8, and is detachably connected to the lower end of the sub liquid supply pipe 41. Show. 8b shows various solenoid valve opening / closing devices. This configuration is the same as the configuration disclosed in Patent Document 3.

  7 to 9 show an embodiment of the hand-held cleaning device of the present invention which is suitable mainly for cleaning the substantially annular heat exchanger of a ceiling-mounted air conditioner. The apparatus includes a long liquid passing pipe 35 that is held by an operator and directed to a heat exchanger attached to an upper ceiling, and a liquid injection nozzle 37 provided at the tip of the pipe via a rotary pipe joint 36. And a driving device for driving the rotary pipe joint 36 provided along the liquid flow path 35, and an air piston cylinder 38, and further, a connecting piece 39 protruding laterally from the rotary pipe joint 36, A long rod 42 attached to the tip of the piston rod 38a of the air piston cylinder 38 is connected to the tip of the piston rod 38a of the air piston cylinder 38 via a rod 40 having a rotary joint portion 40a. By rotating the rotary pipe joint 36 by the operation of the cylinder 38, the sub-liquid injection nozzle 37 is swung up and down at a frequency of 1 to 30 times in 3 seconds. Needless to say, as the driving device 38, a motor capable of forward and reverse rotation may be used instead of the air piston cylinder, as in the above-described embodiment.

  Further, in order to facilitate the use of the hand-held cleaning apparatus having the above basic configuration, the following configuration is preferable. That is, the air piston cylinder 38 is provided with the air piston cylinder 38 on the side of the base portion of the liquid passage pipe 35, front and rear protrusions 41a and 41a protruded from the base portion of the liquid passage pipe 35, and these protrusions. The air piston cylinder 38 is fixedly accommodated by a gripping part 41 constituted by a base part of the liquid passing part 35 and a cylindrical wall part 41b surrounding the air piston cylinder 38 so that the work can be performed during use. A person grasped the grip 41 to facilitate handling of the hand-held cleaning device.

This type of hand-held cleaning apparatus is disclosed in FIG. 12 of a substantially annular heat exchanger cleaning unit of a ceiling-mounted air conditioner cited as a prior art at the time of filing of Patent Document 3. As shown in FIG. 12, since the cleaning unit is a type in which a liquid injection nozzle 104 is fixed to a long liquid passage pipe, an operator holds the liquid passage pipe in his hand when using it. Although the washing is performed by spraying the spray liquid toward the upper heat exchanger surface while being swung, it takes a long time for the washing operation, and therefore, the labor and physical burden required for the washing operation are extremely inconvenient.
On the other hand, the above-mentioned hand-held cleaning device of the present invention swings and swings the spray nozzle by the driving device 38, so there is no need to swing the liquid passage 35 itself by hand. The physical burden can be remarkably reduced, and the effect that the both side surfaces of the multi-stage heat medium circulation pipe can be reliably cleaned is brought about.
In using the hand-held cleaning device of the present invention, a hose led out from the cleaning liquid supply pump is connected in advance to the base end portion of the liquid passing pipe, and the intake pipes 38a and 38a connected to the air piston cylinder are compressed pumps. It goes without saying that it is connected to.
Of course, the hand-held cleaning device of the present invention can also be used for cleaning a panel heat exchanger provided in an air conditioner.

The perspective view of a ceiling-mounted air conditioner. FIG. 2 is a cut-away side view of a cleaning apparatus according to an embodiment of the present invention for cleaning the heat exchanger of the ceiling-mounted air conditioner shown in FIG. FIG. 3 is an enlarged side view of a main part of the cleaning apparatus shown in FIG. FIG. 4 is a front view of the main part shown in FIG. FIG. 4 is a plan view of the main part shown in FIG. FIG. 4 is a side view of the main part shown in FIG. 3 in a state rotated by 180 degrees. The side view of the manual cleaning apparatus which shows another Example. FIG. 8 is a plan view of the cleaning device shown in FIG. FIG. 8 is an enlarged side view of a main part of the apparatus shown in FIG.

Explanation of symbols

A Ceiling-mounted air conditioner
C Annular heat exchanger
C1 Heat medium circulation pipe
C2 fin
3 Liquid supply pipe
5 Liquid injection nozzle
22 Connection pipe
23 Drive unit, air piston cylinder
24 Rotary fitting

Claims (4)

  The cleaning liquid is supplied from a liquid jet nozzle that moves along the surface of a substantially annular or panel-like heat exchanger composed of a large number of heat medium circulation pipes and countless fins arranged orthogonal to each other in the vertical and horizontal directions. In a heat exchanger cleaning device for a ceiling-mounted air conditioner that is blown toward a heat exchanger, the liquid jet nozzle is repeatedly swung up and down along the heat exchanger so as to repeatedly swing upward and downward. A heat exchanger cleaning device for a ceiling-mounted air conditioner characterized by the above.   2. The swinging means of the liquid jet nozzle is characterized in that the liquid jet nozzle is connected to a liquid supply pipe via a rotary pipe joint, and the rotary pipe joint is reversely moved by a driving device. The cleaning apparatus according to 1.   A secondary liquid supply pipe connected to the liquid supply pipe is provided, and a secondary liquid injection nozzle is provided at the upper end of the secondary liquid supply pipe that can swing upward and downward via a rotary fitting. The cleaning apparatus according to 1. A liquid injection nozzle is provided at the tip of a long liquid passage through a rotary pipe joint, and an air cylinder is provided at the side of the base of the liquid passage, and the liquid pipe is provided at the tip of a piston rod of the air cylinder. A long joint extending along the axis is provided, and the tip of the joint is connected to a continuous piece projecting from the rotary pipe joint via a rod having a rotary joint, and the air cylinder is operated to A hand-held cleaning device for a heat exchanger of a ceiling-mounted air conditioner, characterized in that the liquid injection nozzle can be swung freely.

Images