JPH0440783Y2 - - Google Patents

Description

[Detailed Description of the Invention] A. Field of Industrial Application The present invention relates to an in-duct cleaning device that cleans the ceiling surface and left and right side walls of the duct by traveling inside the duct under its own power.

B. Summary of the idea A frame is attached to the front end of the main body, which moves by itself inside the duct, via a pivot point so that it can tilt freely, and a pair of side cleaning tools installed on the left and right sides of this frame are used to clean the left and right side walls of the duct. While cleaning the duct, the upper end of the frame is rotated upward by the frame rotation biasing means, and the ceiling cleaning tool provided at the upper end of the frame is brought into contact with the ceiling surface of the duct. This is an in-duct cleaning device that cleans the surface, and automatically follows changes in the height of the ceiling surface by biasing the upper end of the frame upward around the rotational fulcrum. It is.

C. Conventional technology When heating and cooling multiple rooms at the same time, or when it is necessary to keep the interiors of these rooms clean,
These rooms can be connected to air conditioners installed in different locations via air conditioning ducts, and air adjusted to the desired temperature and clean air can be sent to each room through the air conditioning ducts. This is commonly done. In such an air conditioning system, when air is sent from the air conditioner to each room, clean air that has been filtered is always sent through a filter attached to the air conditioner.

However, inside the air conditioning duct, there is dust that existed before the air conditioner was used, minute dust that could not be captured by the filter, and fibers from clothing, etc., adhering to the inner walls, so it should be clean. In most cases, the conditioned air is actually contaminated.

Therefore, as a method to remove dust, etc. adhering not only to the floor surface of the air conditioning duct, but also to the left and right side walls and ceiling surface, the conventional method is to send compressed air from one side of the air conditioning duct and discharge it together with the compressed air at the outlet side. It can be used to collect dust, etc.
A rotating brush is attached to the lower part of the cleaning cart disclosed in Publication No. 90686, etc., and the dust collected by the rotating brush is vacuum-sucked and collected in a dust collection bag housed inside the cleaning cart. Those who have done so are known.

D Problems to be solved by the invention A method for cleaning an air conditioning duct with compressed air is that, in the case of an air conditioning duct with multiple outlets, the outlet other than the outlet for the compressed air is blocked. Otherwise, compressed air will also be blown out from these outlets, resulting in the problem that the room into which these outlets open will become contaminated with dust.

Furthermore, in the method of cleaning using a cleaning trolley disclosed in Japanese Patent Application Laid-Open No. 59-90686, etc., only the dust etc. accumulated on the floor of the air conditioning duct is collected;
It is impossible to remove dust and the like that adheres to the ceiling and left and right walls, making it impossible to completely clean the inside of the air conditioning duct.

E. Means for Solving the Problems The present invention provides a duct cleaning device that can clean the front surface of the inner wall of an air conditioning duct and can automatically follow the height of the air conditioning duct even if it changes midway. The purpose is to provide.

The duct cleaning device according to the present invention that can achieve this purpose is capable of tilting back and forth around a horizontal pivot point via a bracket protruding from the front end of the main body running inside the duct. a held frame; a pair of side wall cleaners attached to the left and right sides of the frame for cleaning the side walls of the duct; and a ceiling cleaner attached to the upper end of the frame for cleaning the ceiling surface of the duct. and frame rotation urging means for always urging the upper end of the frame upward about the rotation fulcrum in order to bring the ceiling cleaning tool into contact with the ceiling surface of the duct. be.

F Effect When the main body travels inside the duct, the side wall of the duct is cleaned by the side wall cleaning tool that comes into contact with the side wall of the duct. Further, the ceiling cleaning tool provided at the upper end of the frame comes into contact with the ceiling surface of the duct due to the frame rotation biasing means, so that the ceiling surface of the duct is cleaned as the main body moves.

When the height of the duct changes, the reaction force from the ceiling cleaning tool that comes into contact with the ceiling surface of the duct causes the front and back inclination of the frame to change around the pivot point depending on the height of the duct. However, since the ceiling cleaning tool is brought into contact with the ceiling surface of the duct by the frame rotation biasing means, the ceiling surface of the duct can be cleaned without being affected by the height of the ceiling surface of the duct.

G Example Fig. 1 shows the side profile of an embodiment of the duct cleaning device according to the present invention, and Fig. 2 shows the front profile of the duct cleaning device according to the present invention.
As shown in the figure, the cleaning device 2 in this embodiment
The main body 6 has four drive wheels 4 that drive and rotate, and is self-propelled within the duct by the rotation of the drive wheels 4.
and a cleaning device 8 provided in front of the main body 6 in the traveling direction.

The main body 6 in this embodiment includes this main body 6.
The vehicle is equipped with a lighting device 10 that illuminates the front in the traveling direction of the vehicle, and a television camera 12 for observing the inside of the duct.

The cleaning device 8 includes a frame 14 that is shaped like a frame along the ceiling surface and left and right side walls of the duct, and a side wall cleaning tool that is attached to the left and right sides of the frame 14 and comes into contact with the side walls of the duct. A pair of side brushes 16, a ceiling brush 18 as a ceiling cleaning tool that is attached to the upper end of the frame 14 and can come into contact with the ceiling surface of the duct, and a pair of left and right attachments attached to the lower end of the frame 14. A floor brush 22 whose both ends are held so as to be vertically displaceable along long holes 24 formed in the mounting plates 20 and which are open long in the vertical direction, and which abuts against the floor surface of the duct. Floor brush 22
A weight 26 serving as frame rotation biasing means is provided with both ends fixed to the mounting plate 20 on the opposite side of the frame 14 with the frame 14 sandwiched therebetween.

a bracket 2 protruding forward from the main body 6;
8 and the fixture 30 extending from the frame 14,
They are connected to each other via a rotational fulcrum 31, and the cleaning device 8 has a rotation mechanism such that the ceiling brush 18 always moves upwards due to the weight of the weight 26 about the rotational fulcrum 31. Moment is assigned.

The intervals between the side brushes 16 are set to be slightly wider than the width of the duct into which this cleaning device 2 is inserted, and the intervals between the side brushes 16 are set to be slightly larger than the width of the duct into which the cleaning device 2 is inserted. The fixtures 30 and the like that support the brushes 16 and 18 are set so as not to protrude beyond the outer edges of the side brush 16 and the ceiling brush 18.

When inspecting the state of dust adhesion inside the duct or cleaning the inside of the duct, use the frame 1
After the cleaning device 2 is inserted into the duct with the cleaning device 4 tilted, the drive wheels 4 are driven to cause the main body 6 to travel along the duct.

Here, when observing the inside of the duct, the lighting device 10 is turned on and the television camera 12 projects an image of the inner wall of the duct onto a television receiver (not shown) provided outside.

On the other hand, when cleaning the inside of the duct, the side brush 16, ceiling brush 18, and floor brush 22, which are part of the cleaner 8, are in contact with the inner wall of the duct. Dust and the like adhering to the inner wall of this duct can be automatically wiped away.
In this case, the ceiling brush 18 is urged to rotate upward by the weight of the weight 26, so it is always pressed against the ceiling surface of the duct.
Furthermore, even if the height of the ceiling surface changes, the frame 14 follows the change and rotates around the pivot point 31, so that the ceiling brush 18 always comes into contact with the ceiling surface. In addition, the floor brush 22 is inserted into the long hole 2 of the mounting plate 20.
Since the frame 14 can be moved up and down by its own weight along the frame 14, it always remains in contact with the floor surface of the duct even when the frame 14 rotates.

If the distance between the left and right side brushes 16 is smaller than the width of the duct, replace the cleaning device 8 with a frame 14 that corresponds to the width of the duct, or clean only one side wall of the duct, and then
It is best to move the main body 6 laterally and then clean the remaining side wall.

As described above, in this embodiment, the weight 26 is used as the frame rotation biasing means, but it is of course possible to use a tension spring or the like with one end hooked to the main body 6 or the like.

Note that the cleaning tool attached to the cleaning device 8 is not limited to the brush as in this embodiment, but may be a bore-shaped or sponge-shaped one. Also, a floor brush 22
It is also possible to omit this step, but in this case, the dust and the like that have fallen onto the floor of the duct can be cleaned using a conventionally known duct cleaning device.

H. Effects of the invention According to the duct cleaning device of the present invention, the ceiling surface and both side walls of the duct can be cleaned at the same time, which eliminates problems such as contamination of the air in the room due to dust adhering to the inside of the duct. can be prevented. Further, even if the ceiling height of the duct changes, the ceiling cleaning tool can always be brought into contact with the ceiling surface, so even ducts with different ceiling heights can be efficiently cleaned as they are.

[Brief explanation of drawings]

FIG. 1 is a side view showing an embodiment of the duct cleaning device according to the present invention, and FIG. 2 is a front view of FIG. 1. In the drawings, 2 is a cleaning device, 4 is a drive wheel, 6 is a main body, 8 is a cleaner, 14 is a frame, 16 is a side brush, 18 is a ceiling brush, 20 is a mounting plate, 2
2 is a floor brush, 26 is a weight, 28 is a bracket, 30 is a fixture, and 31 is a rotation fulcrum.

Claims (1)

[Scope of utility model registration request] A frame that is held so as to be tiltable back and forth around a horizontal rotational fulcrum via a bracket protruding from the front end side in the running direction of the main body that runs inside the duct, and a frame that is attached to both left and right sides of this frame and that is connected to the duct. a pair of side wall cleaning tools for cleaning the side walls of the duct; a ceiling cleaning tool attached to the upper end of the frame and cleaning the ceiling surface of the duct; and a pair of ceiling cleaning tools for abutting the ceiling surface of the duct. A duct cleaning device comprising frame rotation urging means for always urging an upper end of the frame upward about the rotation fulcrum.