JPH0258994B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method of cleaning ducts for air conditioning and the like.

[Prior Art] Air conditioning ducts have not been cleaned for many years because the ducts are arranged vertically and horizontally, and their cross-sectional area is narrow, making it impossible for people to go inside and clean them. is often used. Therefore, soot, dust, etc. are accumulated inside the duct, and this peels off and exits from the air outlet, thereby deteriorating the indoor living environment.

Traditionally for cleaning such ducts,
There is Japanese Patent Application Laid-Open No. 59-49887 (Conventional Example 1), and Japanese Patent Application Laid-Open No. 54-18157 is a method for cleaning inside pipes.
The techniques described in Japanese Utility Model Application Publication No. 57-131893 (Conventional Example 3) are known.

[Problems to be Solved by the Invention] However, in Conventional Examples 1 and 2, a rotating duster (tool) is installed at the tip of the flexible rotating shaft inside the duct (pipe).
Because the duster is rotated, it is not easy to clean the corners when the duct has a rectangular cross section or other cross section other than a circle. It is necessary to arrange within the duct a means for supporting the rotary duster in the center of the duct, and it is troublesome to arrange it within the duct. Since the support means and the rotating shaft are provided, the weight is heavy, the duct support member requires considerable strength, and the places where it can be used are limited. It is difficult to continuously clean a duct with right-angled steps, and it is also difficult to make the length of the rotating shaft too long, so it is difficult to clean a long range of the duct at once.

In addition, in Conventional Example 3, a bundle of fiber strings is pulled with a rope and reciprocated inside the pipe, and the inner wall of the pipe is rubbed and cleaned by friction. In addition to being troublesome to collect, extremely large forces are required for reciprocating motion, making it impossible to use in ducts with large steps or large changes in cross-sectional area.

The purpose of the present invention is to provide ducts with different cross-sectional shapes and diameters, winding ducts, inclined ducts,
It has a wide range of applications, including ducts with a cross section other than simple and smooth shapes such as circles, and can smoothly collect dust peeled off from the inner wall of the duct.
To provide a method for cleaning the inside of a duct for air conditioning, etc., which provides a uniform and sufficient internal cleaning effect on the duct and is excellent in workability and economy.

[Means for Solving the Problems] In order to achieve the above object, the present invention disposes a dust collector at the opening of the duct, uses the suction force of the dust collector to generate airflow in the duct, and the inside of the duct is pulled by a rope. a frame body smaller than the cross section of the duct; a flexible cylindrical part having one end fixed to the frame body; and a band-like part extending to the other end of the cylindrical part or attached to the outer surface of the cylindrical part. A windsock-type duster is moved, and the windsock-type duster is flapped by the airflow to knock off the dust on the duct inner wall surface and collect the soot and dust dropped by the dust collector. The configuration was adopted.

[Operation and Effects of the Invention] In the windsock type duster, the airflow in the duct causes turbulence near the duster, and this turbulence causes
The dust cleaner sweeps up, down, left and right, hitting or scraping the inner wall of the duct to remove dust from the inner wall.
In addition, the windsock type duster can freely enter the duct regardless of the structure of the duct, such as changes in the cross-sectional shape of the duct, bends in the duct, presence or absence of steps, etc. This makes it possible to clean a very wide range of types of ducts.

An airflow is generated in the duct, and the windsock type duster is towed by a rope. This allows the windsock type duster to be carried over long distances in ducts, making it possible to clean ducts as long as 200 meters at a time.

During cleaning, the dust collector is constantly collecting the dust that has been dusted off, making the dust collection process smooth.

Since the dust remover placed inside the duct is a windsock type consisting of a frame, a cylindrical part fixed to the frame, and a band-like part, the cylindrical part mainly receives a large force from the airflow, and the dust remover spreads over the entire cross section of the duct. It has the effect of swinging vertically, horizontally, and horizontally, and the band-shaped part directly strikes the inner wall of the duct to remove dust from the inner wall of the duct.
Therefore, accumulated dust can be removed uniformly over the entire inner wall surface of the duct.

The duster is extremely light and easy to handle.
Therefore, there is no burden on the duct support structure.
Work can be done even when it is difficult to bring heavy parts into the duct.

In addition, the dust remover placed inside the duct is connected to the frame,
Since it is a windsock type with a cylindrical part and a band-shaped part fixed to the frame, the airflow can smoothly blow through the dustpan, and there is no resistance to the airflow in the duct that weakens this airflow. ,
The airflow allows for a powerful flapping motion to remove dust, and the airflow also smoothly carries the separated dust to the dust collector.

[Example] The details of the present invention will be described below with reference to the drawings.

FIG. 2 is a perspective view showing a first embodiment of a cleaning tool (hereinafter referred to as a windsock type duster) used when cleaning a duct by the method of the present invention.

The windsock type dust remover 1 consists of a rectangular frame 2, a cylindrical part 3 having one end attached to the frame 2, and a band-like part 4 extending to the other end of the cylindrical part 3. In this embodiment, the cylindrical part 3 is made of a material such as paper or cloth, and the vicinity of the other end is divided to form the band-like part 4 made of a plurality of ribbons. Further, a rope 5 is connected to the frame 2.

Now, in order to clean a duct by the method of the present invention, in FIG. 1, a duster 1 is inserted into the duct 6 to be cleaned. (The frame body 2 is selected to be smaller than the cross section of the duct 6.) Since the dust collector 8 is connected to the opening (in this example, the outlet 7) and sucks air for dust collection, the difference in atmospheric pressure causes the duct to 6, airflow flows in the direction of the arrow. The other end of the rope 5 connected to the duster 1 is brought out of the duct 6 through a guide pipe 9 at an appropriate position in the duct 6. If you hold or pull the rope 5, the duct 6
The duster 1 within can remain in place or be moved. The dust sweeper 1 generates rotational turbulence in the dust sweeper 1 part, and the rotation turbulence and atmospheric pressure cause piston motion, amplitude motion, spiral motion, turning motion, etc., and the dusting action and pressing action cause the inner wall surface of the duct to be The soot and dust that has accumulated or adhered to the inner wall of the duct will be scattered or stripped off, and the soot and dust dropped by the dust cleaner 1 due to the airflow flowing inside the duct 6 will be removed from the outlet of the duct 6. 7 and collected by the dust collector 8.

FIG. 3 shows a second embodiment of the dust sweeper 1, in which left and right rudders 10 and up and down rudders 10a are attached to the dust sweeper 1, and by operating these rudders, the dust sweeper 1 can be moved vertically and horizontally, or in a ribbon shape. The wind blows strongly against the belt-shaped portion 4, thereby making cleaning more effective.

FIG. 4 shows a third embodiment of the dust sweeper 1, in which a fan 11 is attached inside the dust sweeper 1. This fan 11 is rotated to generate a strong wind, thereby increasing the pressing action of the cylindrical portion 3 and the belt-shaped portion 4. Further, even if the fan 11 is not rotated but remains fixed, turbulence is generated inside the dust sweeper 1, and the pressing action of the cylindrical portion 3 and the strip portion 4 becomes large. Alternatively, if the fan 11 is mounted diagonally, the wind hits the cylindrical portion 3 diagonally, and one side of the duct 6 is strongly pressed, thereby enhancing the cleaning effect.

FIG. 5 shows a fourth embodiment of the dust remover 1, in which brushes 12 and 13 are attached to a frame 2 and a cylindrical portion 3. The cylindrical portion 3 presses the inner wall surface of the duct 6 and brushes the inner wall surface at the same time. Moreover, if these brushes 12 and 13 are applied to dust removal in other embodiments, the cleaning effect will be increased accordingly.

FIG. 6 shows a fifth embodiment of the dust remover 1. In this embodiment, the constituent members of the frame body 2 are hollow, and a large number of air blowing holes 15 are bored therein. The air hose 14 supplies air to this component, and the air is blown out from the blow-off holes 15 to perform cleaning. Furthermore, if the rubber hose 16 is extended to the end of the dust sweeper 1 and air is blown out from there, cleaning can be carried out more effectively.

7 and 8 show a sixth embodiment of the dust sweeper 1, in which the frame body 2 is bent around a central shaft 17, and a rope 18 tied to the central shaft 17 can be operated. Therefore, as shown in FIG. 8, the width on the left and right sides is small, and it can be used even in the case of a narrow duct.

FIG. 9 shows a seventh embodiment of the dust remover 1. The dust remover 1 has a cylindrical shape, and fixed wings 19 are attached to the frame 2. For this reason, the airflow in the duct 6 rotates and contacts the inner wall surface of the duct 6, thereby cleaning it. That is, the soot and dust adhering to the inner wall surface are cleaned by applying horizontal pressure.

FIG. 10 shows an eighth embodiment of the dust remover 1. In this embodiment, a rotating brush 22 is attached to the top or side surface of the dust sweeper 1 to remove soot, dust, etc. from the inner wall surface of the duct 6. A fan 11 is attached to the frame 2, and the shaft of the fan 11 is connected to the shaft of the rotating brush 22. The fan 11 is rotated by the airflow in the duct 6, and the rotating brush 22 connected thereto is rotated. This duster 1 thoroughly contacts the inside of the duct 6 and performs cleaning by dusting action.

Moreover, FIG. 11 shows the ninth embodiment of dust removal,
A large number of air outlet ports 23 are provided on the side surface of the cylindrical portion 3 of the dust sweeper 1, and a large number of ribbon-like strips 4 are attached to increase the dusting action.

FIG. 12 is a perspective view of a tenth embodiment of the dust sweeper 1, in which the frame 2 of the dust sweeper 1 is made smaller and the cylindrical portion 3 and the strip portion 4 are made larger from the first embodiment to the ninth embodiment. . In this way, when the diameter of the duct 6 changes, it becomes smaller in a narrow place and widens in a large place to perform a cleaning action. Furthermore, when taking it out from the duct 6, there is no need to worry about it getting stuck because it is constricted.

The material of the cylindrical part 3 and the strip part 4 of the dust sweeper 1 may be a vinyl sheet. Further, the shape of the frame body 2 is not limited to rectangular or circular, but triangular,
It may be a polygon, an ellipse, a semicircle, a rod, a curved rod, a bent rod, or the like. These shapes need to be appropriately selected depending on the shape of the duct to be cleaned, the dirtiness inside the duct, etc.

Also, in order to index the dust sweeper 1, it is not necessary to use a rope, but strings, wires, chains, ropes, etc.
Alternatively, it is also possible to use a structure in which rod-like bodies are rotatably connected to each other, or a structure in which the above-mentioned rod-like bodies are combined to make the whole body expandable and retractable.

In the method of cleaning the inside of the duct using the windsock type duster in the above-mentioned 1st to 10th embodiments, the following effects are not achieved with conventional cleaning methods (in which a person enters the duct or removes the duct): has.

There is no need to remove ceilings or ducts other than work openings and installation locations, and the scope of enforcement is wide, regardless of whether the duct is for air conditioning or industrial use, and the size and shape of the duct are subject to enforcement. Accumulated dust can be removed uniformly over the entire inner surface of the duct, the dust remaining in the duct does not scatter again after cleaning, and there is no significant negative impact on the working environment such as noise, vibration, dust generation, dirt, etc. compared to conventional cleaning methods. to avoid increasing costs.

[Brief explanation of drawings]

1 and 2 show a first embodiment for explaining the present invention, FIG. 1 is a partially removed perspective view, FIG. 2 is a perspective view showing the main part, and FIG. 3 is a main part. Fig. 4 shows a third embodiment of the invention, a perspective view showing the main parts, and Fig. 5 shows a fourth embodiment of the invention. , a perspective view showing the main parts, and FIG. 6 show a fifth embodiment of the present invention, and a perspective view showing the main parts, and FIGS. 7 and 8 show a sixth embodiment of the invention, showing the main parts. FIG. 9 is a perspective view showing a seventh embodiment of the present invention, and FIG. 10 is a perspective view showing an eighth embodiment of the present invention, and FIG. 11 is a perspective view showing main parts. FIG. 12 is a perspective view showing the main parts of the ninth embodiment of the present invention, and FIG. 12 is a perspective view showing the main parts of the tenth embodiment of the invention. In the diagram 1... Windsock type duster, 2... Frame, 3
...Cylinder part, 4...Band-shaped part, 5...Rope, 6...
Duct, 7...exit (opening), 8...dust collector.

Claims (1)

[Scope of Claims] 1. A dust collector is disposed at the opening of the duct, and its suction force generates an airflow inside the duct. Moving a windsock type duster comprising a flexible cylindrical part fixed to a frame body and a band-like part extending to the other end of the cylindrical part or attached to the outer surface of the cylindrical part, A method for cleaning the inside of a duct, in which dust is removed from the inner wall of the duct by flapping a duster with airflow, and soot and dust dropped by the dust collector are collected.