JP4752013B2 - Cleaning device for heat exchanger of ceiling mounted air conditioner - Google Patents

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.

The applicant of the present application has disclosed an invention relating to a cleaning device for a substantially annular finned heat exchanger of a ceiling-mounted air conditioner in which a substantially annular finned heat exchanger is arranged in a casing having an open bottom surface. JP-A-9296993, JP-A-9-113185, JP-A-9-113186, JP-A-9-210593, JP-A-10-89892, JP-A-10-89893, JP-A-2000-292093, JP-A-2001-2001. This is disclosed in Japanese Patent No. 82895.
In these gazettes, a ceiling-mounted air conditioner in which a substantially annular finned heat exchanger is arranged in a housing whose bottom surface is opened is moved up and down into a space surrounded by the inner peripheral surface of the finned heat exchanger. A liquid spray nozzle that communicates with a liquid supply pipe that is free to rotate around a vertical axis and that faces the inner peripheral surface of the finned heat exchanger and sprays cleaning liquid and other liquids Disclosure.
JP-A-8-296993 JP-A-9-113185 JP-A-9-113186 JP-A-9-210593 JP-A-10-89892 JP-A-10-89893 JP 2000-292093 A JP 2001-82895 A

However乍Ra, the above-described conventional cleaning apparatus, by rotating the liquid injection nozzle, when cleaning by blowing the cleaning liquid other liquid toward the inner circumferential surface of the heat exchanger with full fin heat exchanger with full fin In the case where the cross section of the plate is an irregular shape other than a circle, there is a problem that the heat exchanger with fins cannot be cleaned uniformly over the entire circumference.
In particular, from the viewpoint of energy saving, recently, a finned heat exchanger is used, and the finned heat exchanger is complicated in order to reduce the blowing resistance of the finned heat exchanger and increase the heat exchange efficiency. The finned heat exchanger that has been bent to increase the heat exchange area of the finned heat exchanger has been developed. However, in the above conventional cleaning device, it is not possible to sufficiently wash the complicated bent portion. I can't.
An object of the present invention is to solve the above-described problems of the conventional cleaning apparatus.

According to the present invention, the ceiling-mounted air conditioner according to claim 1 is provided with a heat exchanger with a fin- like shape having an annular shape other than a circle whose inner peripheral cross section is other than a circle in a housing having an open lower surface. In the space surrounded by the inner peripheral surface of the finned heat exchanger, a liquid injection nozzle communicating with a liquid supply pipe that is movable up and down and rotatable about a vertical axis is supported by the liquid supply pipe, ceiling mounting the cleaning liquid other liquid ejected from and the liquid injection nozzle rotates with the rotation of the liquid supply tube is made to face so as to be directed Ke in injected into the inner peripheral surface side of the heat exchanger with the fin In the heat exchanger cleaning device for a type air conditioner, the ejection surface of the liquid ejection nozzle is disposed on the liquid ejection nozzle regardless of the shape of the finned heat exchanger and the inner circumferential cross section. Liquid injection nozzle direction setting means was provided to face all surfaces of the circumferential cross section . It is characterized by that.
The present invention, as set forth in claim 2, between the fluid ejection nozzle and the liquid supply pipe, irrespective of the shape of the inner peripheral cross section of the heat exchanger with the fin, the liquid supply pipe And a distance setting means for maintaining the distance between the finned heat exchanger and the inner circumferential cross section of the finned heat exchanger substantially constant, and the liquid injection nozzle direction setting means is provided via the distance setting means .
The invention further as described in claim 3, in the heat exchanger cleaning system of the ceiling-mounted air conditioning Desho toner, the distance setting means, Shi pairs outer tube provided with a liquid injection nozzle to the outer tube and the distal sliding a length adjusting tube consisting of an inner tube of the universal movement, characterized by being constituted by a length adjustment equipment consisting of an air piston cylinder to slide relative to the outer tube an inner tube of said length control pipe.
Further, according to the present invention, in the cleaning device for a heat exchanger of the ceiling-mounted air conditioner according to claim 4 , the distance setting means includes a cylindrical outer cylinder and a piston-like inner pipe provided with a liquid injection nozzle at the tip. And a length adjustment device comprising an air piston cylinder for sliding a piston-like inner tube of the length adjustment tube with respect to the cylinder-like outer tube. .
The invention further as described in claim 5, in the heat exchanger cleaning system of the ceiling-mounted air conditioning Desho toner, the distance setting means, the liquid injected at a mouthpiece at the other end continuous with the liquid supply pipe side mouthpiece end A pressure adjusting hose comprising a spiral hose that is connected to the nozzle side and spirally wound in the length direction, and a pantograph mechanism that supports both ends of the pressure hose by attaching both ends to the pressure hose. characterized in that it is constituted by a length setting device consisting of an air piston cylinder for operating the pantograph mechanism.
Furthermore, the present invention is, as described in claim 6, in the heat exchanger cleaning system of the ceiling-mounted air conditioning Desho toner, the distance setting means, bending Shin opposite ends of the pair of connecting pipes via a rotary joint the free end of the connecting freely and one connection pipe via a rotary joint connected to the liquid injection nozzle side, and connected to the liquid supply pipe side via the rotary joint to the free end of the other connecting pipe A length-adjustable tube that can be bent and stretched, and a piston that is connected to one free end of both connecting tubes and a cylinder that is connected to the other free-end side to face the inner peripheral surface of the finned heat exchanger And a length adjusting device composed of an air piston cylinder for adjusting the length of the cylinder .
Further, according to the present invention, in the heat exchanger cleaning apparatus for a ceiling-mounted air conditioner according to claim 7 , the distance setting means includes a root end of the finned heat exchanger from the liquid supply pipe side . A length adjusting pipe comprising a connecting pipe which is connected to a protruding pipe facing the inner peripheral surface through a rotary pipe joint so as to be swingable in the horizontal direction and provided with a liquid jet nozzle on the tip side; The gear provided on the rotary pipe joint, the rack that meshes with the gear, and the rack is operated to adjust the swing angle of the connection pipe with respect to the protruding pipe, and toward the inner peripheral surface side of the heat exchanger with fins It is characterized by comprising a length adjusting device for adjusting the length of the adjusting tube .
Furthermore, the present invention is, as described in claim 8, in the heat exchanger cleaning system of the ceiling-mounted air conditioning Desho toner, liquid injection nozzle direction setting means, rotatably said fluid ejection nozzle to the liquid supply pipe side a rotary joint that connects to, the the rotary tube gear provided on the fitting, meshing with rack gear wheels, by operating the rack inner peripheral surface side of the heat exchanger with the fin the fluid ejection nozzle face It is characterized by comprising a liquid injection nozzle angle setting device comprising an air piston cylinder facing directly to .
Furthermore, the present invention is, as described in claim 9, in the heat exchanger cleaning system of the ceiling-mounted air conditioning Desho toner, liquid injection nozzle direction setting means, the fluid ejection nozzle, via the distance setting means a rotary joint for rotatably connected to the liquid supply pipe side, the a rotary tube gear provided on the fitting, meshing with rack the gear, heat with the fin the fluid ejection nozzle face by operating the rack It is characterized by comprising a liquid injection nozzle angle setting device comprising an air piston cylinder that is adjusted so as to face the inner peripheral surface side of the exchanger .

Thus , according to the heat exchanger cleaning device for a ceiling-mounted air conditioner according to the invention described in claim 1, the heat exchanger with fins having an annular shape other than a circular shape is used for cleaning the shape of the inner peripheral cross section. when, even the inner circumferential cross-sectional shape becomes如 what shape, the liquid injection nozzle direction setting means, thereby confronting the ejecting surface of the liquid injection nozzle to the inner peripheral surface of the heat exchanger with the fin Therefore, the cleaning liquid can be sprayed uniformly on all the inner peripheral surfaces of the finned heat exchanger , and good cleaning can be performed.
Furthermore, according to the heat exchanger cleaning system of the ceiling-mounted air conditioner Desho toner according to the invention of claim 2, the liquid injection nozzle direction setting means, the inner peripheral ejection surface of the fluid ejection nozzle of the heat exchanger finned Combined with facing the surface, the cleaning liquid can be sprayed more uniformly and better cleaning can be performed .
Further Oite the heat exchanger cleaning system of the ceiling-mounted air conditioner Desho toner according to the invention described in claims 3 to 7 may be realized by an extremely simple configuration the distance setting means.
Further Oite the heat exchanger cleaning system of the ceiling-mounted air conditioner Desho toner according to the invention of claim 8 can easily realize a liquid injection nozzle direction setting means.
Furthermore, in the heat exchanger cleaning device for a ceiling-mounted air conditioner according to the invention of claim 9, the distance setting means and the liquid injection direction setting means can be easily realized.

An example of an embodiment of the present invention will be described in detail with reference to FIGS.
FIG. 1 is a perspective view of an air conditioner A attached to a ceiling. The air conditioner A includes a substantially annular finned heat exchanger C in a casing B having an open bottom surface, and includes a blower (not shown) in the central space of the casing B, as shown in FIG. In addition, a lid member D is provided on the lower surface of the casing B, and the lid member D is provided with an air inlet E at the central portion thereof and an air outlet F at the periphery thereof. G denotes a stay bolt that suspends the casing B from the ceiling slab.
Upon cleaning the cleaning device (hereinafter referred to as the cleaning device) the annular heat exchanger C Finned according to the present invention is performed to remove the pre-closure member D and Bro A.
This cleaning apparatus has a mounting base 2 installed by means of mounting means 1 on the lower open surface of the casing B of the air conditioner A, and a substantially annular fin extending through the mounting base 2 in the vertical direction when viewed from the plane. It extends vertically through the mounting base 2 so as to face the center position of the heat exchanger C, and its upper part faces a space surrounded by the inner peripheral surface of the substantially annular finned heat exchanger C. and a liquid supply pipe 3, the liquid supply pipe 3 is rotated about a vertical axis while moving up and down by driving kinematic device 4, which is supported by the mounting base 2, the liquid jet communicating with the liquid supply pipe 3 Cleaning was performed by spraying cleaning liquid and other liquids from the nozzle 5 toward the inner peripheral surface C1 of the finned heat exchanger C.
One example of the attachment means 1 is at least two places on the left and right or front and rear of the mounting base 2, in the illustrated example, at four places on the front and rear, right and left, and at the upper end of each string 1a. A hook 1b provided and a fastening fixture 1c for fixing several free ends of each string-like body 1a fixed to the mounting base 2 were configured. Since the detailed configuration, the tightening operation, and the releasing operation are the same as those described in Patent Document 5, the description thereof is omitted.
The mounting base 2 has an opening 2a at the center, a rising wall 2b that rises upward around the opening 2a, and a lid 2c that covers the opening from the upper surface. 2d, and a storage space S for the driving device 4 that causes the liquid supply pipe 3 and the injection nozzle 5 connected to the liquid supply pipe 3 to perform the up-and-down movement and the rotational movement about the vertical axis on the lower surface of the mounting base 2. The housing | casing 2e which has is provided. The housing 2 e is fastened and fixed to the mounting base 2 together with the outer race 9 a of the ball bearing 9. The spray pattern of the liquid spray nozzle 5 is conical.
Reference numeral 6 denotes a dish-like hopper made of a transparent or translucent material that receives the cleaning liquid or other liquid ejected from the liquid ejection nozzle 5 and is detachably attached to the outer peripheral edge of the mounting base 2. Thus, the hopper 6 attached to the outer peripheral edge of the mounting base 2 is attached to the lower surface of the casing B by the installation means 1 as shown in FIG. The hopper 6 may be integrally connected to the mounting base 2 instead of being detachably attached to the mounting base 2. 7 is a carriage type floor-mounted unit provided with a liquid supply / recovery device 8 for supplying cleaning liquid and other liquids to the liquid jet nozzle 5 through the liquid supply pipe 3 and recovering the cleaning liquid and other liquids accumulated on the hopper 6. Indicates. Although not shown, the liquid supply / recovery device 8 includes a recovery tank, a cleaning liquid tank, and a finishing agent tank. The cleaning liquid tank is a chamber for storing three types of cleaning liquids having different concentrations of water and detergent. The finisher tank is partitioned into a chamber for storing three types of finisher liquids, a disinfectant liquid, a disinfectant liquid, and a corrosion prevention liquid.
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. More specifically, the rotational drive unit 10 is fixed to the internal gear 12 attached to the lower surface of the outer race 9a of the ball bearing 9 provided in the housing 2 below the mount 2, and to the upper surface of the inner race 9b. The motor 14 supported by the support plate 13 provided and the gear 15 on the rotating shaft of the motor 14 meshing with the internal gear 12, and the outer race 9 a is attached to the mount 2 by a plurality of connecting rods 16. In addition, the lid 2c is supported by a plurality of support rods 17 rising from the inner race 9b and supported so as to rotate together with the inner race 9b. The ball bearing 9 has a watertight structure.
The elevating drive unit 11 includes a rack rod 18 connected to the liquid supply pipe 3 via a bracket 37, and an elevating drive motor 19 attached to the support plate 13 that moves the rack rod 18 up and down. In addition, although not shown in the figure, the liquid supply pipe 3 is provided with a guide for guiding the liquid supply pipe 3 up and down and liquid leakage.
In FIG. 2, reference numeral 20 denotes a distribution board that feeds power to the motors 14 and 19 provided on the support plate 13 and a limit switch LMS that detects the upper limit position of the liquid supply pipe 3 via a lead wire 20a. .
The liquid supply / recovery device 8 is connected to the liquid supply pipe 3 via a detachable hose 21a, and a drain recovery port 6a provided in the hopper 6 is connected to the liquid supply / recovery via a detachable hose 21a. It is connected to the device 8. 8b shows various electromagnetic valve opening / closing devices. The above configuration is the same as that of the conventional cleaning apparatus described in Patent Documents 4 and 5 and the like.
In the above-described configuration, the present invention adjusts and sets the ejection surface 5a (shown in FIG. 5) of the liquid ejection nozzle 5 in a direction facing the heat exchanger C having a fin-like shape with a non-circular shape other than a circular cross section. The liquid jet nozzle direction setting means 23 is provided.
Further, according to the present invention, in the above configuration, a distance between the liquid supply nozzle 3 and the inner peripheral surface C1 of the finned heat exchanger C is set between the liquid supply pipe 3 and the liquid injection nozzle 5 connected thereto. The liquid which adjusts and sets the distance setting means 22 which can be adjusted, and the jetting surface 5a (shown in FIG. 5) of the liquid jet nozzle 5 so as to face the above-described substantially annular heat exchanger B with fins. An injection nozzle direction setting means 23 is provided.
More specifically, the distance setting means 22 for adjusting the distance between the liquid injection nozzle 5 and the inner peripheral surface C1 of the finned heat exchanger C includes an outer tube 24a and an inner tube that slidably penetrates the outer tube 24a. As a length setting device that adjusts and sets the protruding length of the variable length tube 24, an air piston cylinder 25 that moves the inner tube 24b back and forth along the outer tube 24a. (Shown in FIG. 4). 3 to FIG. 7 for further explanation, the cylinder 25a side of the air piston cylinder 25 is connected and supported to the outer tube 24a via a support member, and the piston 25b is connected to the inner tube 24b. The liquid injection nozzle 5 attached to the distal end portion of the inner tube 24b is connected to the distal end side by sliding the inner tube 24b back and forth with respect to the outer tube 24a. Advancing and retreating with respect to the surface C1, the distance between the inner peripheral surface C1 of the finned heat exchanger C and the liquid injection nozzle 5 is adjusted and set to a desired position.
The liquid spray nozzle direction setting means 23 includes a rotary pipe joint 26 that connects the liquid jet nozzle 5 to the tip of the inner pipe 24b so as to be able to swing left and right, a gear 27 attached on the rotary pipe joint 26, A rack 28 meshed with the gear 27 and an air piston cylinder 29 as a liquid injection nozzle angle setting device for driving the rack 28 are configured.
More specifically, the rack 28 is slidably supported by a guide 30 provided at the distal end side of the inner tube 24b and is connected to the distal end of the piston 29a of the air piston cylinder 29. The cylinder 29b is connected to the inner tube 24b. The end of the tube 24b was supported via a continuous piece 31.
Thus, the rack 28 is moved back and forth by the air piston cylinder 29, and the liquid injection nozzle 5 can be swung left and right over a range of about 180 degrees through the gear 27 interlocked therewith. Thus, the ejection surface 5a of the liquid ejection nozzle 5 can be adjusted and set so as to face the inner peripheral surface C1 of the finned heat exchanger C correctly.
Further, the outer pipe 24a, which is a constituent member of the distance setting means 22, is connected to the rotary pipe joint 34 at the distal end portion of the protruding pipe 33 protruding from the liquid supply pipe 3 toward the inner peripheral surface C1 side of the finned heat exchanger C. When connecting and cleaning via the air piston cylinder 35, the distance setting means 22 side, that is, the liquid injection nozzle 5 connected to the distance setting means 22 is moved up and down at a speed of about 2 to 3 times per second. By swinging, the heat medium circulation pipe C2 running in the lateral direction of the finned heat exchanger C can be efficiently cleaned.
The outer tube 24a and the inner tube 24b that is liquid-tight and slidable with respect to the outer tube 24a through a packing 24c are a rotating tube provided on the outer tube 24a as shown in FIGS. The connection port 24a-1 connected to the joint 34 and the connection port 24a-2 provided on the inner tube 24b are slit grooves 24a- formed along the length direction of the outer tube 24a provided on the inner surface of the outer tube 24a. 3 to communicate.
The protruding pipe 33 is provided at the upper end of the liquid supply pipe 3 so as to freely swing up and down via a rotary fitting 36, and protrudes to the opposite side of the protruding pipe 33 with respect to the rotary fitting 36. A projecting rod 38 is inserted through the center in the width direction of the bracket 37 supported by the liquid supply pipe 3, and the projecting rod 38 surrounds and projects below the bracket 37. A coil spring 39 is interposed between the enormous portion 38a provided on the lower surface of the bracket 37 and the lower surface of the bracket 37 so as to keep the protruding tube 33 horizontal at all times. When the rod 38 further moves down from the state of contact with the upper surface of the lid 2c, the rod 38 is pushed downward from the horizontal state when the rod 38 is pushed up against the coil spring 39 to be compressed. As a result, the position of the liquid injection nozzle 5 is further increased. A state of somewhat directed obliquely downward along with the fall.
As a result, the lower end of the finned heat exchanger C that cannot be opposed to the horizontal liquid jet nozzle 5 is prevented by the bellows tube 40 that surrounds the rack rod 18 provided for waterproofing. .
Furthermore, according to the present invention, the liquid supply pipe 3 is provided in parallel with the liquid supply pipe 3 and extends vertically and moves up and down as the liquid supply pipe 3 moves up and down. A secondary liquid supply pipe 41 that rotates about the central axis of the gear 12 is provided, and is branched from the detachable hose 21 a via a switching valve 8 a that intervenes in the hose 21 a that is led out from the liquid supply and recovery device 8. The hose 21c is connected to the secondary liquid supply pipe 41, and is further swung up and down through the rotary pipe joint 42 at a position higher than the liquid injection nozzle 5 above the secondary liquid supply pipe 41. A secondary liquid injection nozzle 43 having a surface 43a obliquely upward toward the ceiling of the housing B is provided, and the protrusion 44 penetrates through one side of the bracket 37 supported by the liquid supply pipe 3 and protrudes. The tube 33 is inserted in parallel with the projecting rod 38 for operating, and the projecting rod 44 has Under the bracket 37, the sub-liquid injection nozzle 43 is normally kept slightly upward by being bent between the enlarging portion 44 a provided on the projecting rod 44 and the lower surface of the bracket 37. A coil spring 45 is interposed, and when the auxiliary liquid supply pipe 41 moves downward, the protruding rod 44 further moves downward from a state where it contacts the upper surface of the lid 2c. 44 is pushed up, and accordingly, the sub-liquid injection nozzle 43 is slightly inclined downward.
In addition, the injection pattern of the sub-liquid injection nozzle 43 has a fan shape that expands up and down by 5 ° to 10 °.
Thus, the sub-nozzle 43 can clean the ceiling surface of the casing B, and the sub-liquid injection nozzle 43 tilts downward in conjunction with the descending operation of the sub-liquid supply pipe 41. The peripheral part of the ceiling of B and the upper part of the heat exchanger C with fins can be cleaned. The cleaning by the sub liquid injection nozzle 43 is performed for a desired time after the cleaning by the liquid injection nozzle 5 or by switching the switching valve 8a prior to the cleaning.
As shown in FIG. 9, each of the air piston cylinders 25, 29 and 35 connects one air chamber of each air piston cylinder 25, 29 and 35 to the pump side connected to the liquid supply pipe 3, and the other air A first position a connecting the chamber to the exhaust port, a second position b connecting one air chamber to the exhaust port and connecting the other air chamber to the pump side connected to the liquid supply pipe 3, and a central stop by a spring It is operated by a three-position type electromagnetic switching valve 46 that automatically returns to position c.

Next, the operation of the rotation drive unit 10, the elevation drive unit 11, and the electromagnetic switching valve 46 will be described with reference to the circuit diagram shown in FIG.
The elevating drive unit 11 includes an optical sensor E3X3 that detects a base position of the vertical movement of the liquid ejecting nozzle 5, an optical sensor E3X1 that detects a downward movement position of the liquid supply pipe 3, and a position that detects an upward movement position. Control is performed using a limit switch LMS. When the switch SW1 intervening in the relay 60X1 is pressed, the relay 60X1 is excited to close the contact 60x1 interposed in the terminal line of the control board DR1 of the lifting / lowering motor 19. As a result, the up-and-down movement motor 19 rotates forward, and the rack rod 18 moves down. Along with this, the liquid supply pipe 3 also moves downward. When the projecting rod 44 that moves down with the downward movement hits the upper surface of the lid 2c, this is detected by the optical sensor E3X3 (detects the mark applied to the rack 18), and the relay 60X3 is excited by this detection, The switching contact 60x3 provided on the terminal line of the control board DR1 of the lifting motor 19 is switched from the high-speed side fixed contact 60x3-1 to the low-speed fixed contact 60x3-2. As a result, the rotation of the lifting drive motor 19 is decelerated. When the liquid supply pipe 3 reaches the lower limit position, this is detected by the optical sensor E3X1 (a small hole provided in the rack cage is detected) and input to the terminal line of the program controller PC, and the terminal of the program controller PC By outputting from the line, the relay 60X2 is excited and the contact 60x2 provided on the terminal line of the control board DR1 is closed. As a result, the up-and-down motor 19 rotates in the reverse direction, and raises the liquid supply pipe 3 and the secondary liquid supply pipe 41. When the position at which the projecting rod 44 moves away from the plate surface of the lid 2c (swing end position) is detected by the optical sensor E3X3, the switching contact 60x3 provided on the terminal line of the control base DR1 of the lifting / lowering motor 19 is fixed to the fixed contact on the low speed side. Switch to 60x3-1. As a result, the rotation of the lifting motor 19 returns to the normal speed.
Then, the limit switch LM in which the liquid supply pipe 3 reaches the upper limit position is opened, and the relay 60X2 connected to the terminal line of the program controller PC is demagnetized. As a result, the contact 60x2 provided on the terminal line of the control board DR1 is opened. As a result, the lifting motor 19 stops. In FIG. 8, F1 and F2 are fuses, 61 is a rectifier transformer for converting AC 100V to DC 24V, and 62 is a transformer for converting DC 24V to DC 5V.

The rotation drive unit 10 is controlled using a sensor E3X2 that detects a rotation base point provided in a housing 2e below the mount 2. Explaining this, when the switch SW6 provided on the terminal line of the control base DR2 of the rotation drive motor 14 is pressed, the rotation drive motor 14 rotates in the forward direction and rotates the mount in the clockwise direction.
The rotational speed of the movable base RS3 provided on the control board DR2 is selected by selecting the first fixed contact RS3-1, the second fixed contact RS3-2, and the third fixed contact RS3-3. The speed can be switched to three levels: an extremely fast speed, a slightly gentle speed when the chemical solution is sprayed when the dirt is somewhat severe, and an extremely slow speed when washing.
Thus, when the liquid supply pipe 3 and the secondary liquid supply pipe 41 rotate once and a small hole (base position, not shown) provided in the internal gear is detected by the optical sensor E3X2, the signal is sent to the terminal of the program controller PC. The rotation drive motor 14 is reversed by inputting to the line and outputting from the terminal line of the program controller PC to the terminal line of the control board DR2. In this case, if the motor 14 for rotation is used as a brake motor and the brake is applied for several seconds, the position of the base point can be easily confirmed. When the switch SW6 is pressed again, the energization to the terminal line of the control board DR2 is cut off and the rotation driving motor 14 is stopped.
In the illustrated embodiment, the liquid supply pipe 3 and the auxiliary liquid supply pipe 41 are arranged at positions slightly deviating from the central axis of the internal gear 12. Accordingly, the liquid supply pipe 3 and the secondary liquid supply pipe 41 revolve, but either one of the liquid supply pipe 3 or the secondary liquid supply pipe 41 is at a position that coincides with the central axis and seems to rotate. Anyway. Accordingly, in the invention of the present application, “rotation” means both revolution and rotation.
When the switch SW6 is pressed, the energization to the terminal line of the control board DR2 is cut off and the rotation motor 14 stops.

  The electromagnetic switching valve 46 includes two push button switches SWa, SWb, SWc, SWd for each switching operation provided in each of the air piston cylinders 25, 29, 35, which are intervened in the terminal line of the program controller PC. And SWe and SWf are closed by manual operation as necessary, so that the respective electromagnets 25a, 25b, 29a, 29b, 34a, 35b of the respective electromagnetic switching valves 46 corresponding to the respective air piston cylinders 25, 29 or 35 are provided. Thus, each electromagnetic switching valve 46 can be switched from the stop position c to the first position a or the second position b, thereby controlling the respective air piston cylinders 25, 29, and 35, respectively. I made it.

FIG. 10 shows an example when the rotational position of the liquid injection nozzle 5 and the direction of the injection surface are controlled by the air piston cylinders 25 and 29.
As shown in FIG. 10 , the liquid injection is performed along the inner peripheral surface C1 of the finned heat exchanger C that is bent in a complicated manner in the circumferential direction, as an irregular substantially annular finned heat exchanger C other than the above-described circle. While the nozzle 5 makes one round (about 10 to 20 minutes per round), the length of the variable length tube 24 is controlled to be expanded and contracted by an air piston cylinder 25, so that the liquid jet nozzle 5 and the annular finned heat are supplied. The distance d from the inner peripheral surface C1 of the exchanger C is always kept constant at all positions in the circumferential direction, and the air piston cylinder 29 swings the injection surface 5a of the liquid injection nozzle 5 to the left and right to provide fins. As shown in the figure, the injection surface 5a of the liquid injection nozzle 5 is opposed to all the inner peripheral surface C1 of the heat exchanger C, and the cleaning liquid or the like from the liquid injection nozzle 5 is provided over the entire periphery of the heat exchanger C. sufficient and uniform in a flat spray cleaning liquid has to be performed.

In the above-described cleaning operation by the present apparatus, first, the water supply side of the high-pressure pump WP is connected to a water supply source such as a water supply and the push button switch SW5 is pressed. While the pushbutton switch SW5 is being pressed, the solenoid valve SV8 interposed in an air vent pipe (not shown) is energized and opened to release air from the high pressure pump WP.
Next, when the push button switch SW2 is pressed, the electromagnetic valve SV7 provided in the liquid supply / recovery device 8 is opened and the relay 60WP is excited, and the excitation contact 60wp is closed to operate the high pressure pump WP. Accordingly, a cleaning operation is performed in which the cleaning liquid is sprayed from the liquid injection nozzle 5 toward the inner peripheral surface C1 of the finned heat exchanger C.
During this operation, the distance between the liquid spray nozzle 5 and the inner peripheral surface C1 of the finned heat exchanger C from the lower side of the hopper 6 and the direction of the spray surface 5a are observed through a manual operation, and each of them shown in FIG. By switching the respective electromagnetic switching valves 46 intervening in the air piston cylinders 25 and 29, the air piston cylinders 25 and 29 are operated, and the liquid injection nozzle 5 is always applied to the inner peripheral surface C1 of the finned heat exchanger C. Is maintained at a substantially constant distance, and the liquid injection nozzle 5 is swung left and right so that the ejection surface 5a always faces the inner peripheral surface C1 of the finned heat exchanger C. The cleaning operation is performed while operating to spray the cleaning liquid uniformly and satisfactorily on the entire surface of C.

Of the of the cleaning apparatus, the distance an operation for confronting the ejecting surface 5a of the liquid injection nozzle 5 on the inner circumferential surface C1 of the heat exchanger C Finned with kept substantially constant, the air conditioner Desho toner of pre-washed target model Accordingly, the shape and size of the atypical annular finned heat exchanger B are stored in the program controller PC, and the air piston cylinders 25 and 29 are controlled by the automatic switching operation of the electromagnetic switching valve 46 based on the shape and size. By doing so, this operation can be automated. Further, this operation may be performed while confirming the image from the CCD camera or the image on the switch panel.
Prior to this work, the liquid spray nozzle 5 is used to spray and spray detergent, and after washing, spraying a finishing agent, etc., but this work is different from what is conventionally known. Since there is no description, the explanation of the cleaning operation is omitted.

FIG. 11 shows a modified example 22A of the distance setting means 22, in which the length convertible 24 shown in the above-described embodiment includes a cylindrical outer cylinder 47a and a piston-like inner cylinder 47b slidably inserted therein. It is replaced with a piston cylinder type variable length pipe 47 constituted by
FIG. 12 shows a modified example 22B of the distance setting means 22, and the length convertible 24 shown in the embodiment is changed between the rotary pipe joint 34 and the rotary pipe joint 26 on the liquid injection nozzle 5 side. A part of the pressure hose connected between the ends 48a and 48b at both ends can be replaced by a pressure hose 48 formed in a spiral portion having a variable length.
In this embodiment, a pantograph mechanism 49 is provided by positioning the pressure hose 48 above both ends and binding the both ends to the base 48a and the base 48b. The pantograph mechanism 49 uses the pressure hose 48 and the liquid. Support the spray nozzle.
Incidentally, the air piston cylinder 25 as a length setting device for adjusting and setting the length of the pressure hose 48 supports the cylinder 25a on the base 48b portion by a support member.

  The liquid injection nozzle direction setting means 23 uses, for example, a swing mechanism that swings the liquid spray nozzle 5 up and down as shown in FIGS. A desired swinging means can be used as the left-right swinging means of the liquid ejecting nozzle 5 such as swinging.

As the liquid injection nozzle angle setting device, instead of the piston cylinder 29, a small reversible rotary motor 32 can be used as shown in FIG.
That is, the gear 32a fixed to the rotating shaft of the reversible rotary motor 32 is meshed with the gear 27A of the rotary joint 26, whereby the reversible rotary motor 32 is rotated forward and backward to adjust the injection nozzle angle. can do.

  14 to 16 show still another modification 22C of the distance setting means 22. The connecting pipe 50 is supported at the tip of the protruding pipe 33 so as to be swingable up and down via the rotary fitting 34. The connecting pipe 50 is provided with a liquid jet nozzle 5 at the front end of the connecting pipe 50 through a rotary pipe joint that can swing left and right through a rotary pipe joint 51 and that constitutes the liquid jet nozzle direction setting means 23. The connecting pipe 52, the gear 53 provided on the rotary pipe joint 51, the rack 54 meshing with the gear 53, and driving the rack 54, so that the protruding pipe 33 of the connecting pipe 52 protrudes. The piston cylinder 55 functions as a swing angle adjustment setting device that adjusts the left and right swing angles with respect to the direction. The other configuration of the distance setting means 22 is not different from the above embodiment. With this configuration, the operation of the piston cylinder 55 moves the connection pipe 52 to the left or right by a desired angle, and adjusts and sets the swing degree of the connection pipe 52 with respect to the protruding pipe 33 as desired. The distance between the liquid spray nozzle 5 provided at the tip of the connection pipe 52 that is swung at an angle and the inner peripheral surface C1 of the heat exchanger C can be adjusted as desired, and then the liquid spray nozzle direction setting means 23 described above. Thus, the spray surface 5a of the liquid spray nozzle 5 is directly opposed to the inner peripheral surface C1 of the heat exchanger C, and spray cleaning is performed.

Further, FIG. 17 shows a further modification 22D of the distance setting means 22, in which a connecting pipe 57 is connected to the connecting pipe 50 via the front and rear rotary joints 56 so as to bend and stretch in the horizontal direction. Is connected to the liquid jet nozzle 5 via a rotary joint 60, and thus both front and rear connection pipes 57 and 59 are connected. An air piston as a length setting device, which is configured to be a variable length pipe, and is capable of bending in a horizontal direction with respect to the protruding direction of the protruding pipe 33 around the rotary joint 58 between the connecting pipes 57 and 59. is obtained by constituting the distance setting means 22D by the cylinder 6 3, wherein the air piston cylinder 6 3, adjust setting the length of said length variable tube, said liquid jet nozzle 5 and the heat exchanger with the fin C Adjust the distance from the inner peripheral surface C1 Then, from this state, the spray nozzle direction setting means 23 causes the spray surface 5a of the spray nozzle 5 to face the inner peripheral surface C1 of the finned heat exchanger C to perform spray cleaning. I did it.

The perspective view of an air conditioner. The side view which shows an example of embodiment of this invention washing | cleaning apparatus. The expanded side view of the principal part of the apparatus of FIG. FIG. 4 is a plan view of the apparatus shown in FIG. 3. FIG. 4 is a front view of the apparatus shown in FIG. 3. FIG. 5 is a partial enlarged cross-sectional view of FIG. 4. FIG. 7 is a cross-sectional view taken along line AA in FIG. 6. The operation circuit diagram of the cleaning device of the present invention. The schematic diagram which shows the electromagnetic switching valve which operates an air piston cylinder. The top view which shows the operation state of this invention cleaning apparatus. The top view which excluded a part which shows the some modification of the distance setting means shown in FIG. The top view which shows the other modification of the distance setting means shown in FIG. The top view which shows the modification of the nozzle direction setting means of FIG. The enlarged plan view of the modification of the distance setting means of this invention apparatus. The top view of the modification shown in FIG. The modification example side surface shown in FIG. The top view which shows the further modification of a distance setting means.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Installation means 2 Mounting stand 3 Liquid supply pipe 5 Liquid injection nozzle 10 Rotation drive part 11 Lift drive part 22 Distance setting means 22A, 22B, 22C, 22D Distance setting means 23 Liquid injection nozzle direction setting means 24 Length variable pipe 25 Distance Setting means, air piston cylinder 29 injection angle setting device, air piston cylinder 32 injection angle setting device, forward / reverse rotation motor 33 projecting pipe 41 sub liquid supply pipe 43 sub liquid injection nozzle, air piston cylinder 61 as length setting device Air piston cylinder as a setting device

Claims (9)

A ceiling-mounted air conditioner in which a heat exchanger with fins having an annular shape other than a circle having an inner peripheral cross-sectional shape other than a circle is arranged in a casing with an open bottom surface is surrounded by the inner peripheral surface of the finned heat exchanger. A liquid injection nozzle that communicates with a liquid supply pipe that is movable up and down and rotatable about a vertical axis , is supported by the liquid supply pipe, and rotates with the rotation of the liquid supply pipe. in the heat exchanger cleaning system of the ceiling-mounted air conditioner Desho toner which is faced to the cleaning liquid other liquid is injected towards Ke on the inner peripheral surface side of the heat exchanger with the fin ejected from the liquid ejection nozzle, the liquid Liquid that causes the ejection nozzle to face the entire surface of the inner circumferential cross section of the finned heat exchanger regardless of the shape of the finned heat exchanger and the inner circumferential cross section. Ceiling-mounted air, characterized by providing injection nozzle direction setting means Heat exchanger cleaning apparatus Ndeshona. Between said fluid ejection nozzle and the liquid supply pipe, irrespective of the shape of the inner peripheral cross section of the heat exchanger with the fin, the inner peripheral cross section of the liquid supply pipe and the heat exchanger finned 2. The heat exchanger for a ceiling-mounted air conditioner according to claim 1, wherein a distance setting means for maintaining the distance substantially constant is provided, and the liquid injection nozzle direction setting means is provided via the distance setting means. Cleaning device. The distance setting means comprises a consist Shi pairs outer tube provided with a liquid injection nozzle to the outer tube and the distal end and the inner tube of the universal sliding length adjustment tube, the inner tube of said length adjusting tube to the outer tube ceiling-mounted air Conditioning Desho toner for a heat exchanger cleaning apparatus according to claim 2, characterized in that is constituted by a length adjustment equipment consisting of an air piston cylinder to slide against. The distance setting means includes a piston cylinder type length adjusting pipe composed of a cylindrical outer cylinder and a piston inner pipe provided with a liquid injection nozzle at the tip, and the piston inner pipe of the length adjusting pipe is connected to the outer cylinder. 3. The cleaning device for a heat exchanger of a ceiling-mounted air conditioner according to claim 2, wherein the cleaning device is a length adjusting device comprising an air piston cylinder that is slid with respect to the pipe. The distance setting means includes a pressure hose provided with a spiral portion spirally wound in a length direction and connected to the liquid supply nozzle side at one end of the base and to the liquid injection nozzle side at the other end. claims, characterized in that by binding the two ends to the base is constituted by a length adjustment tube section consisting of a pantograph mechanism for supporting the pressure hose, the length setting device consisting of an air piston cylinder for operating the pantograph mechanism Item 3. A heat exchanger cleaning device for a ceiling-mounted air conditioner according to Item 2. The distance setting means is connected to the opposite ends through a rotary joint to the free end of the connecting flexion extension freely through the rotary joint and the one connecting pipe liquid injection nozzle side of the pair of connecting pipes, A length-adjustable pipe that is connected to the liquid supply pipe side via a rotary pipe joint at the free end of the other connection pipe, and a piston on one free end side of both connection pipes on the other free end side 3. The length adjusting device comprising an air piston cylinder that binds a cylinder and adjusts the length of the adjusting pipe facing the inner peripheral surface of the finned heat exchanger. A heat exchanger cleaning device for a ceiling-mounted air conditioner as described. The distance setting means connects the root end to the projecting tube from the liquid supply tube side to the inner peripheral surface side of the finned heat exchanger so as to be swingable in the horizontal direction with respect to the projecting tube via a rotary joint. And a length adjusting pipe comprising a connecting pipe provided with a liquid jet nozzle on the tip side, a gear provided on the rotary pipe joint, a rack meshing with the gear, and operating the rack to connect the connecting pipe to the protruding pipe. 3. The ceiling according to claim 2 , comprising a length adjusting device that adjusts the swing angle to adjust the length of the adjusting pipe toward the inner peripheral surface side of the finned heat exchanger. Cleaning equipment for heat exchangers of mounted air conditioners. The liquid injection nozzle direction setting means includes a rotary joint for rotatably connecting said fluid ejection nozzle to the liquid supply pipe side, a gear provided on said rotary joint, meshing with rack the gear, the by operating the rack to claim 1, characterized by being configured the fluid ejection nozzle face with a liquid jetting nozzle angle setting device consisting of an air piston cylinder for confronting the inner peripheral surface side of the heat exchanger with the fin A heat exchanger cleaning device for a ceiling-mounted air conditioner as described. The liquid injection nozzle direction setting means, the fluid ejection nozzle, and rotary joint for rotatably connected to the liquid supply pipe side via the distance setting means, a gear provided on said rotary joint, the gear composed of meshing with the rack, a liquid injection nozzle angle setting device comprising a by operating the rack said fluid ejection nozzle face of the air piston cylinder to adjust so as to directly face the inner peripheral surface side of the heat exchanger with the fin ceiling-mounted Air Conditioning Desho toner for a heat exchanger cleaning apparatus according to claim 2, characterized in that the.

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