JPH04187277A - Method of cleaning ventilation duct - Google Patents

Abstract

PURPOSE: To perform a cleaning operation for a ventilation duct effectively as well as at a low cost by allowing a strong air flow to pass through the ventilation duct so that at least one cleaning member having the same cross sectional shape as that of the duct passes through the ventilation duct with the aid of the air flow. CONSTITUTION: When a cleaning operation is performed for a ventilation duct (3) which is one of ventilation ducts, a suction car, a large-sized ventilation device, a large-sized suction device or a duct trap, for example, is mounted to it through an attachment (16). All openings (7, 8, 9) are closed, a brush formed so as to correspond or conform to the cross-sectional shape of the ventilation duct (3) is put into the duct from the opening (17), for example, and an air flow is allowed to pass through the ventilation duct (3) at a high speed. The speed of the air flow is selected in relation to a structure of the duct. In addition, a pressurized air is blown into the ventilation duct (3) in order to remove dusts which are broken up into pieces.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an improvement in the method of cleaning ventilation ducts.

(Prior Art and Problems to be Solved by the Invention) Conventional cleaning methods are carried out by sweeping with a broom, in which the broom itself is pulled back and forth in a discharge duct or a humid duct. That is what it is. Some methods also use small "robot cars" with rotating brushes and are assisted by cameras.

However, broom cleaning can only be used in horizontal ducts. The result is an incomplete lean, which is also very expensive, time consuming, and unsatisfactory.

The present invention solves the drawbacks and problems associated with the prior art described in 1-1, in which the ventilation ducts are cleaned in the most satisfactory manner without changing the configuration of the ventilation ducts or providing extensions. The objective is to provide a method that can remove microorganisms along the entire length of the tube, is more effective, and is the least expensive.

This object is achieved by the method indicated in the characteristic description of the patent claims.

[Summary of the Invention] (Means for Solving the Problems) A cleaning method according to the present invention distributes a strong air flow through a ventilation duct, and cleans at least one cleaning member that matches the cross-sectional shape of the ventilation duct. This method of cleaning a ventilation duct is characterized in that airflow is passed through the ventilation duct.

In addition, a plurality of brushes are continuously passed through the ventilation duct, each of these brushes having bristles with different stiffnesses h′, and the first brush having bristles having the highest stiffness. The last brush is
It consists of the softest bristles.

The ventilation duct cleaning method is completed by blowing compressed air into the ventilation duct.

The ventilation duct i. after being finished with the brush may be treated to be free from contamination.

The ventilation duct may be treated with water vapor and/or a soil melting agent.

(Example) The present invention will be described below with reference to an example in which a plurality of ventilation ducts are provided in two rooms in a house.

This will be explained with reference to embodiments shown in the drawings.

The figure shows a house consisting of two rooms 1.2 fitted with ventilation ducts 3.4.5.

This ventilation duct 3, 4.5 is connected to a common ventilation device 6 and has an open lower 8° 9.10, 1 for discharging air.
1.12.13.14 and 15 are provided. These openings are defined by those skilled in the art as “implements”.
ments)” (tools).For example,
When cleaning the ventilation duct 3, which is one of the ventilation ducts, it is installed via a suction source, for example a suction vehicle, a large ventilation device, a large suction device or a duct trap. And all open lowers, 8.

9 is closed and a brush shaped to correspond to or adapted to the cross-sectional shape of the ventilation duct 3 is introduced, for example through the opening 17, to pass the air flow into the ventilation duct 3 at high speed. The speed of this air flow is high, between 20 and 50 m/s, and this speed is chosen in relation to the (duct) structure. The bristles of the brush, which are quickly passed through the ventilation duct 3 by the air flow, are made of steel or nylon. but,
In its use, the first step is to use one with steel bristles, then one with nylon bristles, and then the compressed air is loosened. Blown into ventilation ducts to remove loose dust. If necessary, the brush may also be used for cleaning afterwards. At the last stage,
A member for preventing contamination is applied to the ventilation duct 3 to prevent contamination.

A person skilled in the art in Sweden would describe such a pollution prevention member as “
This material, called "illcr," is sprayed freely onto the surface of the duct to kill microorganisms on the surface and maintain a contamination-free condition.This contamination-free condition continues. It acts effectively and prevents the growth of new bacterial cultures.

If the ventilation ducts are very narrow in the population area.

The brush is difficult to enter, so in this case the nylon wire is fed into that narrow slot and a suction device is used to suck the nylon wire up to the wider population at the opposite end of the ventilation duct. At this end the brush is attached to said nylon wire and pulled to the first mentioned end of the ventilation duct,
Then perform the cleaning described above.

The brush can be, for example, a foam rubber ball (Tapology).
approggc) format) or other abrasive materials or balls of other shapes. Once the dirt and dust in the ventilation duct is removed, this ventilation duct should be sprayed to prevent contamination. If too much contamination is prevented, the air from the suction device will remove it.

In most cases, pollution control involves removing fatty or oily deposits from the surface of the duct, but it can also be accomplished using steam with added melting agents to clean the surface of the duct. This is particularly useful for ducts where nicotine is deposited on the walls.

The present invention is not limited to the embodiments shown and described above, and can be modified in various ways without departing from the scope of the claims.

As already mentioned, the body whose surface is cleaned by a strong air flow drawn through the duct can be formed in any number of ways, but in most cases satisfactory results are obtained by brush means.

The brushes within the claims of the invention can also be formed of various types to be applied to deposits in ventilation ducts.

[Effects of the Invention] - As described above, according to the present invention, the ventilation duct can be cleaned most effectively and inexpensively without changing the configuration of the ventilation duct or providing an extension part, and the entire length of the ventilation duct can be cleaned. Microorganisms can also be removed.

[Brief explanation of the drawing]

The figure is a schematic perspective view showing one embodiment of the present invention. 3.4.5...Ventilation duct,

Claims (1)

[Claims] 1) A strong air flow is passed through the ventilation duct, and at least one cleaning member that matches the cross-sectional shape of the ventilation duct is made to pass through the ventilation duct with the air flow. How to clean ventilation ducts. 2) A plurality of brushes are passed successively through the ventilation duct, each brush having bristles having different stiffness, the first brush consisting of bristles having the highest stiffness; 2. The method of cleaning ventilation ducts according to claim 1, wherein the last brush comprises the softest bristles. 3) The ventilation duct cleaning method according to claim 1 or 2, wherein the cleaning method is completed by blowing compressed air into the ventilation duct. 4) The ventilation duct after being finished with the brush,
A method of cleaning a ventilation duct according to any of the preceding claims, wherein the ventilation duct is treated to be free from contamination. 5) A method for cleaning a ventilation duct according to any one of the preceding claims, wherein the ventilation duct is treated with water vapor and/or a dirt melting agent.