JP3322509B2 - Moving direction switching device for air conditioner automatic cleaning device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

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

[0002]

2. Description of the Related Art The above ceiling mounted air conditioner is particularly suitable for offices and restaurants from the viewpoint of improving heat exchange efficiency and utilizing indoor floor surfaces. However, in these places,
It is necessary to clean the oil smoke generated by smoking and cooking, since the oil smoke sticks 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, a method of spraying a detergent liquid onto a heat exchanger using an injection nozzle has been performed for an air conditioner of a ceiling embedded type as shown in FIG. In this method, after removing parts that hinder the cleaning operation of a ventilation panel provided on the ceiling surface and a fan (not shown) fitted to a fan motor or the like, surrounding the outer circumference of the indoor unit casing 101, the transparent panel is formed. A funnel-shaped washing liquid receiver 102 made of a vinyl sheet is vertically installed, and a detergent liquid and washing water spray nozzle 104 is inserted into a hollow hole 103 provided on a side surface of the washing liquid receiver 102. 105 in the figure is a detergent reservoir,
106 is a suction pump, 107 is an injection nozzle 104 at the tip.
This is a suction hose attached. The washing liquid dripping from the heat exchanger is collected in a washing liquid reservoir 109 via a washing liquid receiver 102 and a drain hose 108. Japanese Patent Application Laid-Open No. 4-306496 describes that a cleaning unit in which a cleaning liquid (and air) discharge nozzle and a suction nozzle are combined in an arrangement sandwiching a heat exchanger is provided along the heat exchanger while holding it by hand. A technique for reciprocating right and left is disclosed. On the other hand, the indoor unit 200 of the ceiling suspended air conditioner illustrated in FIG.
It was removed from the table, washed, and mounted on the ceiling again.

[0003]

However, the method of spraying the detergent liquid from the spray nozzle inserted into the bore of the washing liquid receiver is far better than the method of wiping with a rag,
It involves the danger of working at heights and requires considerable effort. Such difficulties are common to the apparatus disclosed in Japanese Patent Application Laid-Open No. Hei 4-306496, in which the cleaning unit is reciprocated while being held by an operator by hand. On the other hand, the method of once removing the indoor unit from the ceiling surface at the time of cleaning is extremely inefficient because the attaching and detaching work requires a great deal of work. Accordingly, the applicant of the present application has proposed a complete indoor unit of a type in which a heat exchanger is provided so as to surround a fan, by completely turning an injection nozzle installed at a location where the fan is removed toward the heat exchanger. A heat exchanger cleaning apparatus capable of performing automatic cleaning has been developed, and patent applications have been filed as "Japanese Patent Application No. 5-269699" and "Japanese Patent Application No. 5-269699". However, the method of disposing the heat exchanger is not limited to the above, and two rectangular plate-shaped heat exchangers are opposed to each other with a fan interposed therebetween. Some of them are opposed 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. Therefore, an object of the present invention is to suitably apply one or more rectangular plate-shaped heat exchangers to a ceiling-mounted type having a structure in which the heat exchanger is opposed to a fan, It is an object of the present invention to provide an air conditioner automatic cleaning device having a configuration in which the device is reciprocally mounted on a guide rail in a state facing the air conditioner, and a moving direction switching device thereof.

[0004]

In order to achieve the above-mentioned object, a moving direction switching device for an automatic air conditioner washing apparatus according to the present invention is detachably mounted on a casing 201 of an indoor unit, and is provided with a heat exchanger 50. A guide rail B opposed to the heat exchanger 50 at a predetermined interval along a longitudinal direction of the apparatus, and a cleaning nozzle 13 for injecting a cleaning liquid toward the heat exchanger 50, the apparatus main body being reciprocally mounted on the guide rail B. A, a reciprocating means C having a motor 2 for moving the apparatus main body A, a cleaning liquid supply apparatus E for supplying a pressurized cleaning liquid to the cleaning nozzle 13, and a moving direction switching means G for the apparatus main body A. A pair of contact members 2 attached near both ends of the guide rail B as the movement direction switching means G, respectively.
And a switch for transmitting, to the changeover switch, a movement in which the apparatus main body A comes into contact with (approaches) any one of the pair of contacting members along with the reciprocating movement thereof. And a member. The switching member includes a switching rod 22 disposed on the device main body A along a reciprocating direction of the device main body A. As the device main body A reciprocates, one of the switching rods 22 is switched. It is preferable that the movement of the leading end contacting one of the contact members 23 is transmitted to the actuator of the changeover switch 20. The pair of contact members 23 may be slidably attached along the guide rail B so that the distance between the contact members 23 corresponds to the length of the heat exchanger 50.

[0005]

The cleaning nozzle of the apparatus main body A mounted on the casing of the indoor unit with the guide rail B being opposed to the guide rail B at a predetermined interval along the longitudinal direction of the heat exchanger 50 and mounted on the id rail B is provided. When the cleaning device 13 is connected to the cleaning liquid supply device E, the mounting of the cleaning device is completed. Therefore, when the cleaning liquid supply device E and the reciprocating means C are activated, the apparatus main body A starts to move from one end of the guide rail B to the other while spraying the cleaning liquid toward the heat exchanger 50. When the apparatus main body A reaches the other end of the guide rail B, it comes into contact (approach) with the contact member 23 provided at the other end, and this movement is transmitted to the changeover switch 20 via the switching member. The rotation direction of the moving motor 2 is changed based on the switching operation. As a result, the apparatus main body A moves toward one end so as to return along the guide rail B, and when the main body A comes into contact with the contact member 23 provided at this one end, the rotation direction of the moving motor 2 is changed in the same manner as described above. Is converted again. If a set of the contact members 23, 23 is variably arranged, the heat exchanger 50 can be adapted to various lengths. A patent application has been filed for the device main body A separately from the present application.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is applied to a ceiling-mounted air conditioner will be described below with reference to FIGS. FIG. 1 and FIG.
2 shows a state in which it is attached to a casing 201. The box-shaped casing 201 having the lower surface opened is suspended by a suspension bolt 202 on a beam member or the like behind the ceiling.
The open lower surface faces the ventilation hole 301 provided in the ceiling surface 300. The drawing shows a state in which a ventilation panel, a ventilation fan, etc., which hinder the cleaning operation, have been removed.

In the rectangular casing 201, as shown in FIG. 2, rectangular panel-shaped heat exchangers 50 are vertically arranged along opposing side walls in the longitudinal direction.
A ventilation fan is installed between the set of heat exchangers.

The schematic configuration of the cleaning apparatus 100 is shown in FIGS.
, A guide rail B for reciprocating the apparatus main body A along the longitudinal direction thereof while facing the heat exchanger 50 at a predetermined interval, and a reciprocating means C of the apparatus main body A.
A cleaning nozzle unit D that is assembled to the apparatus main body A and sprays a cleaning liquid toward the heat exchanger 50; a cleaning liquid supply device E that supplies a pressurized cleaning liquid to the cleaning nozzle unit D; The moving direction switching means G is a main component.

The details of these components will be sequentially described below. The guide rail B of this embodiment is made of a long rectangular cylinder made of stainless steel, and, as shown in FIG. 2, opposing side walls 201a, 201a in the longitudinal direction of the casing 201.
Are removably mounted between the lower edge portions using a mounting member F described later.

The apparatus main body A has the structure shown in FIGS. Reference numeral 1 denotes a disk-shaped base arranged in a vertical direction, and a moving motor 2 for reciprocating the apparatus main body A is horizontally arranged at the upper center of the back surface (the right side in FIG. 3 as a side view) of the base 1. I'm attached.

As shown in FIGS. 4 and 5, on the front side of the base 1, two rotating shafts 3 and 3 are protrudingly provided at equal intervals on both left and right sides of the motor shaft 2a. A drive roller 4 for reciprocating the apparatus main body A is fitted on each of the rotating shafts 3. As shown in FIG. 3, a V-shaped groove 4a is formed on the outer peripheral surface of the rubber driving roller 4 so as to be pressed against the upper ridge of the guide rail B whose diagonal direction is vertical and horizontal. I have. Further, flat gears 5, 6 and 6, which mesh with each other, are fitted on the motor shaft 2a and the two rotating shafts 3, 3, respectively.

As shown in FIGS. 5 and 6, a driven roller 7 serving to pinch the guide rail B in cooperation with a pair of driving rollers 4 and 4 is provided below the front surface of the base 1. And a pair of fixed shafts 8, 8 rotatably mounted, respectively, projecting in a cantilever support manner. Reference numeral 9 denotes a bracket that supports the distal ends of the rotating shafts 3 and 3. As shown in FIGS. 4 and 6, the driven roller 7 is biased between the respective distal ends of the pair of rotating shafts 3 and the fixed shafts 8 facing each other so as to approach the driving roller 4. The coil spring 10 is stretched. The driven roller 7 and the coil spring 10 constitute a pressing means for pressing the driving roller 4 against the guide rail B.
Further, each of the members 2 to 10 is a reciprocating means C of the apparatus body A.
Is composed. Incidentally, the driven roller 7 is made of plastic, and idles in the event of an abnormality to prevent damage to the apparatus.

Next, the cleaning liquid nozzle unit D shown in FIGS. 3 and 6 has, as a main body, a nozzle mounting pipe 11 that rises in an L-shape from the lower front end of the base 1. Nozzle mounting tube 1
A horizontally rotatable pipe joint 12 for connecting an end of a liquid feed hose 65 extending from a cleaning liquid supply device E to be described later is attached to the first horizontal portion 11a. Also, in the rising portion 11b,
A set of front and rear washing nozzles 13 is attached to a plurality of locations vertically spaced apart at predetermined intervals.

Further, as shown in FIG. 3, a pressure-sensitive switch that opens and closes in accordance with the presence or absence of the supply of the pressurized liquid into the nozzle mounting pipe 11 is provided at the base end (the right end in the figure) of the horizontal portion 11a. So that the movement motor 2 is energized only when the pressurized liquid is supplied. The pressure-sensitive switch includes a piston 14 incorporated in the base end, a spring 15 for normally urging the piston 14 backward (moving leftward in the figure), and a base 1.
And a microswitch 16 mounted on the back side of the. When the piston 14 pushed by the pressure of the pressurized liquid moves forward against the urging force of the spring 15, the tip of the piston 14 presses the actuator of the microswitch 16 to turn it on.

Next, in FIGS. 3 and 5, reference numeral G indicates a moving direction switching means of the apparatus main body A. The moving direction switching means G is mounted to be able to move left and right in a switching switch 20 mounted on the back side of the base 1 and in a guide groove 21 provided to penetrate the base 1 horizontally in the radial direction. The switching rod 22 (switching member) and, as shown in FIG. 2, a set of contact members 23 provided near both ends of the guide rail B to contact both ends of the switching rod 22 respectively. , 23.

The contact member 23 is slidable along the guide rail B as shown in FIG.
Thus, it is fixed at a predetermined slide position. Thereby, the reciprocating stroke of the apparatus main body A can be adapted to the length of each heat exchanger 50 housed in the indoor units 200 of various types.

As shown in FIG. 5, an actuator 20a of the changeover switch 20 is provided at an intermediate portion of the changeover rod 22.
And a projection 22a that is pressed to turn on.
Further, stoppers 22b for restricting the movement range of the switching rod 22 are attached near both ends. Reference numeral 24 shown in FIG. 3 is an operation control device of the moving motor 2, which receives the ON / OFF signal of the changeover switch 20, and switches the rotation direction of the motor. Reference numeral 25 denotes a power cord, and reference numeral 26 denotes a liquid-proof cover for protecting electric components and the like, which is fitted on the back side of the base 1.

FIG. 9 shows an example of an electric circuit constituting the operation control device 24. 24a in the figure is a switching delay circuit,
It plays the role of adjusting the timing of energizing the motor when the rotation direction of the moving motor 2 is switched. Reference numeral 24b denotes a polarity switching unit that switches the polarity of the current supplied to the moving motor 2.

To extend the guide rail B between the opposing side walls 202a, 201a of the casing 201, FIGS.
Are used as shown in FIG. The straddling member F has, as a main body, a rectangular tubular mounting bar 30 having a length equal to or greater than the width of the opposing side wall 201 a of the casing 201. Opposing side walls 201a are provided on both left and right sides of the mounting bar 30.
A screw-type fixing clamp 31 for holding the lower edge portion is slidably mounted to the left and right. In the middle of the mounting bar 30, as shown in FIG. 2, gripping clamps 32 for gripping both ends of the guide rail B are also slidably mounted to the left and right.

Next, the cleaning liquid supply device E of this embodiment
It has the configuration shown in FIG. That is, the truck 60 on which the device E is mounted includes a detergent liquid tank 61, a cleaning liquid (water) tank 62, a liquid feed pump 63, a switching valve (not shown) for switching the connection between the tanks 61 and 62 and the liquid feed pump 63, The control unit 64 for automatically controlling the operation of the apparatus main body A and the cleaning liquid supply apparatus E according to an arbitrarily set program is mounted. The end of the liquid sending hose 65 extending from the liquid sending pump 63 is connected to the pipe joint 12 of the apparatus main body A.

Next, in FIGS. 1 and 2, reference numeral 70 denotes a washing liquid receiver.
The end of a drain hose 72, which is vertically provided below the ventilation hole 301 on the ceiling surface 300 using a hanging fitting 71 and is connected to a drain port 70 a at the lower end thereof, is inserted into the drain reservoir 73. 74
Reference numeral denotes a liquid-proof curtain, which plays a role of closing a gap generated between the ventilation hole 301 and the upper edge of the washing liquid receiver 70. The upper end of the liquid-proof curtain 74 is covered with a rubber band or the like around the skirt of the casing 201 of the indoor unit, and the lower end is provided with a washing receiver 70.
Hanging inside.

Next, the operation of the above configuration will be described. To remove oily dirt attached to the heat exchanger 50 using the cleaning device 100, first, a ventilation panel on the ceiling surface 300,
Remove the parts that interfere with the cleaning operation, such as the drain pan and ventilation fan (both not shown) of the indoor unit 200. Next, as shown in FIG. 2, the bridging members F of the guide rails B are screwed and fixed to the respective lower edges of the longitudinally facing side walls 201a of the casing 201 of the indoor unit as described above. . Then, the holding clamp 32, which is attached to the mounting bar 30 so as to be able to slide, is set and placed at a substantially intermediate position between the pair of heat exchangers 50, 50 opposed in the casing 201.

On the other hand, the drive roller 4
As shown in FIG. 3, the guide rail B is inserted and sandwiched between the and the driven roller 7 against the urging force of the coil spring 10 as shown in FIG. In this state, both ends of the guide rail B are gripped as described above by the gripping clamps 32 assembled to the pair of mounting bars 30, 30, respectively. As a result, the guide rail B to which the apparatus main body A is attached is in a state of being erected at a substantially central portion thereof along the longitudinal direction of the open lower end of the casing 201. One set of abutment members 23, 23 are arranged so that their facing distance is equal to that of the heat exchanger 50.
Adjust to fit the length of

Next, the pipe joint 12 at the lower end of the apparatus main body A
Is connected to the end of a liquid supply hose 65 extending from the cleaning liquid supply device E. Then, the operation program of the cleaning device 100 is set by the control unit 64. That is, the injection time and injection pressure of the detergent liquid and the cleaning liquid, the moving speed of the apparatus main body A, the number of reciprocating movements, and the like are appropriately set according to the size and the degree of contamination of the heat exchanger 50. Further, as shown in FIG. 2, the washing liquid receiver 70 is provided directly below the ventilation hole 301 on the ceiling surface, and a gap between the ceiling surface 300 and the upper edge of the washing liquid receiver 70 is formed. , The operation preparation of the cleaning apparatus 100 is completed. In this operation standby state, the cleaning liquid supply device E
Is switched to the side where the liquid sending pump 63 sucks the detergent liquid.

Therefore, when the cleaning device 100 is started, the liquid supply pump 63 is started, and the nozzle mounting pipe 1 is started.
1, the piston 14 constituting the pressure-sensitive switch moves forward against the force of the spring 15 and pushes the actuator of the microswitch 16 to move the moving motor 2.
Is started, and the detergent liquid is sprayed from each washing nozzle 13 toward the heat exchanger 50.

The rotation of the moving motor 2 is transmitted to the drive roller 4 after being decelerated, and the drive roller 4 is pressed against the guide rail B by the action of the driven row 7 and the coil spring 10 as described above. Therefore, the apparatus main body A starts to move on the guide rail B in the outward direction as if it were a self-propelled vehicle running on the rail.

When one end of the switching rod 22 incorporated in the apparatus main body A comes into contact with the contact member 23 provided on one end of the guide rail B, the switching direction of the moving motor 2 is changed. The switch 20 operates as described above,
A signal is sent to the control device 24. Thereby, the device body A
Has its direction of movement changed, and moves while continuously spraying the detergent liquid toward the return direction. Then, when reaching the other end of the guide rail B, the other end of the switching rod 22 contacts the contact member 23 provided on the other end of the guide rail B, and returns to the forward direction again.

When the apparatus main body A repeats the reciprocating movement a predetermined number of times as described above and the oily dirt of the heat exchanger 50 is completely removed, the control unit 64 switches the supply liquid to the cleaning nozzle 13 from the cleaning liquid to the cleaning liquid. The switching valve provided in the liquid piping system is operated so as to switch to (water). However, the switching valve may be manually operated while observing the cleaning state of the heat exchanger 50. Then, after continuing the cleaning liquid injection step according to the above-described detergent liquid injection step for a predetermined time, the liquid feeding pump 63
To stop. Along with this, the moving motor 2 is also stopped by itself, and a series of automatic cleaning steps of the heat exchanger 50 is completed.

FIG. 10 shows another embodiment in which the present invention is applied to a ceiling-suspended air conditioner. This air conditioner indoor unit 2
In the case of 00, one heat exchanger 50 is housed in the casing 201 in an inclined state, not vertically, as shown in the figure, to reduce the height. Therefore, the guide rail B is also installed so as to be biased to one side of the casing 201. Further, the rising portion 11a of the cleaning nozzle unit D is replaced with one that is adapted to the structure of the indoor unit 200. The configuration and operation method of the cleaning apparatus 100 are in accordance with the above-described embodiment.

It should be noted that the object of the present invention is achieved even if the detailed structure of the above configuration is changed as appropriate. For example, the changeover switch 20 and the switching member 22 can be replaced with a photoelectric switch or the like. Further, a pinion may be used in place of the drive roller 4 constituting the reciprocating means C, and may be engaged with a rack provided on the guide rail B. Further, as for the moving motor 2, as a means for switching the rotation direction,
Various well-known switching mechanisms can be used as substitutes, the power supply battery can be mounted on the apparatus main body A, and the energization can be switched on and off by a manual switch.

[0031]

As is apparent from the above description, the automatic air conditioner cleaning apparatus and the moving direction switching apparatus according to the present invention have various excellent effects as listed below. (A) Since it is of an automatic cleaning type, 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) The operation of reciprocating the apparatus main body along the guide rail is automatically performed by the movement direction switching means. (D) By changing the spacing between a pair of abutting members constituting the moving direction switching means, the reciprocating movement stroke can be arbitrarily changed to correspond to various types and sizes of heat exchangers. Can be (E) Therefore, one type of cleaning device can be shared for indoor units of various types and capacities, and the operation rate thereof can be sufficiently increased. (F) Since the cleaning nozzle unit can be easily replaced with one suitable for each indoor unit, one type of cleaning device can be used.
It is convenient because it can be shared by different types of indoor units. (G) The moving direction switching means has a simple structure and can be compactly incorporated in the apparatus main body.

[Brief description of the drawings]

FIG. 1 is a schematic view of an entire apparatus showing an embodiment in which the present invention is applied to a ceiling-mounted air conditioner.

FIG. 2 is a perspective view showing a state in which the cleaning device is attached to a casing of an indoor unit, with a part of the casing being cut away.

FIG. 3 is a vertical cross-sectional view of the apparatus main body;

FIG. 4 is a plan view showing a partial cross section of the above.

FIG. 5 is a longitudinal sectional view in the XX line direction of FIG. 3;

FIG. 6 is a front view of the same.

FIG. 7 is a partial cross-sectional plan view showing the configuration of the movement direction switching means.

FIG. 8 is a front view of the guide rail and the apparatus main body, showing the configuration of the movement direction switching means.

FIG. 9 is an electric circuit diagram of the control device constituting the moving direction switching means.

FIG. 10 is a sketch drawing of the entire apparatus showing another embodiment in which the present invention is applied to a ceiling-suspended air conditioner.

FIG. 11 is a perspective view of an indoor unit of a ceiling-suspended air conditioner.

FIG. 12 is an explanatory diagram of a conventional example.

[Explanation of symbols]

 REFERENCE SIGNS LIST 100 Cleaning device 200 Indoor unit 201 Casing 201a Opposing side wall 202 Suspended bolt 300 Ceiling surface 301 Ventilation hole 50 Heat exchanger A Device body B Guide rail C Reciprocating means D Cleaning nozzle unit E Cleaning liquid supply device F Crossover member G Moving direction switching means 1 Base 2 Moving motor 2a Motor shaft 3 Rotating shaft 4 Drive roller 4a V-shaped groove 5,6 Flat gear 7 Follower roller (pressing means) 8 Fixed shaft 9 Bracket 10 Coil spring (pressing means) 11 Nozzle mounting Pipe 11a Horizontal part 11b Rise 12 Pipe fitting 13 Cleaning nozzle 14 Piston 15 Spring 16 Micro switch 20 Switching switch 20a Actuator 21 Guide groove 22 Switching rod (switching member) 22a Projection 22b Stopper 23 Contact member 23a Screw 24 Control Apparatus 25 Power cord 26 Liquid-proof cover 30 Mounting bar 31 Fixing clamp 32 Clamping clamp 60 Dolly 61 Detergent liquid tank 62 Cleaning liquid tank 63 Liquid feed pump 64 Control unit 65 Liquid feed hose 70 Wash liquid receiver 70a Drain outlet 71 Hanging Fitting 72 Drain hose 73 Drain reservoir 74 Liquid curtain

────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Futa Kawamura 390 Muramatsu, Shimizu-shi, Shizuoka Pref. Air Conditioning Systems Division, Hitachi, Ltd. (72) Munehiro Imao 1-Aichi-cho, Kasugai-shi, Aichi Aichi Electric Co., Ltd. (72) Inventor Minoru Sugino 1 Aichi-cho, Kasugai-shi, Aichi Aichi Electric Co., Ltd. (56) References JP-A-63-315894 (JP, A) JP-A-63-247504 (JP, A) JP-A Sho 64-70179 (JP, A) JP-A-59-142398 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) F28G 15/04 F28G 1/16 F28G 9/00

Claims (3)

(57) [Claims] 1. A guide rail (B) removably mounted on a casing (201) of an indoor unit and opposed to the heat exchanger (50) at a predetermined interval along a longitudinal direction of the heat exchanger (50).
Body A having a cleaning nozzle 13 for injecting a cleaning liquid toward the apparatus, and being reciprocally mounted on the guide rail B.
A reciprocating means C having a moving motor 2 for reciprocating the apparatus main body A; a cleaning liquid supply device E for supplying a pressurized cleaning liquid to the cleaning nozzle 13; A switch 20 for switching the direction of rotation of the motor 2 for movement, and a set of contact members mounted near both ends of the guide rail B, respectively. 23, 23, and a switch for transmitting, to the changeover switch 20, a movement in which the apparatus main body A comes into contact (approach) with one of the set of contact members 23, 23 with the reciprocation thereof. A moving direction switching device for an automatic air conditioner washing device, comprising: 2. The switching member comprises a switching rod 22 disposed on the apparatus main body A along the reciprocating direction of the switching member. The movement of one of the tips contacting one of the contact members 23 is performed by the switch 20.
The moving direction switching device for an automatic air conditioner cleaning apparatus according to claim 1, wherein the moving direction is transmitted to the actuator. 3. The pair of contact members 23, 23 are slidably mounted along the guide rail B so that the distance between the contact members 23 corresponds to the length of the heat exchanger 50. 3. The moving direction switching device for an automatic air conditioner washing apparatus according to claim 1, wherein