JPS625043A - Cleaning of duct for air conditioning - Google Patents

Abstract

PURPOSE:To clean the inside of duct efficiently and effectively by a method wherein a suction hose is connected to the suction port of a fan, whose dust collecting filter is attached to one end of cleaning division of the duct whose openings on the way of cleaning dividion are closed, while high-pressure air is injected into the duct through the opening of the duct at the other end thereof. CONSTITUTION:Many openings 10a-10f are provided in the cleaning division of the duct 10, however, the opening 10f is utilized as the beginning point of cleaning and the opening 10a is utilized as the finishing side of cleaning while the openings 10b-10e on the way of the cleaning division are closed by shielding plates 30 or the like. The other end of the suction hose 12, connected to the opening 10a, is connected to the suction port of the fan 14 and the dust collecting filter 16 is attached to the air discharging port of the fan 14. A nozzle head 22, at the tip end of the hose 20 connected to the delivery port of the compressor 18, is inserted into the duct 10 through the opening 10f, compressed air is injected energetically from the slit-type injection port of the nozzle toward the inner wall of the duct obliquely before the nozzle and, thereafter, the compressed air is discharged to the side of the filter 16 through the hose 12.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a cleaning method that utilizes airflow to remove dust and the like that has adhered to and accumulated inside an air conditioning duct of a building or the like.

(Background of the Invention) A practical method that can rationally clean the inside of an air conditioning duct has not yet been established, and the reality is that various methods such as the following have been attempted.

■Partition the flow path of the air conditioning duct appropriately, concentrate the airflow from the air conditioner to one or several outlets, and use the concentrated airflow to remove dust and discharge it from the outlets.

■Multiple openings are created in the duct, and the interior is vacuumed manually through the openings.

■Put the cleaning robot into Dow 1.

■Multiple holes are made in the duct at predetermined intervals, a thin hose is inserted through the holes, and the hose is flopped around to remove dust adhering to the inside.Then, use method (■) to guide the dust outside.

Although it is very convenient to use air conditioners attached to ducts, even if you concentrate the airflow using method (2), you will not be able to obtain a very high-speed airflow and the dust removal effect will be very low. Method (2) can compensate for this, but this is a very inefficient operation, and it is difficult to clean the inside of the duct evenly with this method. Method (2) can only be applied to large-diameter ducts, and there are many locations that cannot be cleaned due to building structural constraints. The method (2) using a cleaning robot is easy to apply when the internal structure of the duct is simple and constant. However, when dealing with ducts of various structures and sizes, Sei I! O-bot has too little versatility.

(Purpose of the Invention) This invention was made in view of the above-mentioned technical background, and its purpose is to provide a system that can be universally applied to air conditioning ducts of various structures found in general buildings, and that uses as few equipment as possible. To provide a method for efficiently and effectively cleaning the inside of a duct.

(Summary of the Invention) In the cleaning method of the present invention, a suction hose is connected to one end of the section to be cleaned in an air conditioning duct, and an opening on the way from this section to an opening at the other end of the cleaning section is closed. put. Further, the suction hose is connected to the suction port of the blower, a dust collection filter is attached to the exhaust port of the blower, and the inside of the duct is made to have a negative pressure by operating the blower. Then, an air hose is inserted into the duct from the opening on the other end side, and high-pressure air generated by a compressor is blown into the duct through the air hose, and a part of it is blown against the inner wall of the duct, so that the inside of the duct is A high-speed airflow is generated toward the suction hose, and this high-speed airflow removes dust and the like and guides it to the dust collection filter.

(Embodiment) FIG. 1 shows an embodiment in which a horizontally disposed horizontal duct 10 is cleaned by the method of the present invention. The illustrated horizontal duct 10 is a part of an air conditioning duct, and this section is provided with a large number of openings 108 to 10f such as air supply ports or exhaust ports. In this example, the opening 10f on the right side is used as the cleaning start point, and the opening 10a on the left side is used as the opening on the cleaning end side.

A thick suction hose 12 with a diameter of about 25 cIR is attached to the opening 10a.
combine. The other end of this suction hose 12 is connected to the blower 14.
A bag-shaped dust filter 16 is attached to the exhaust port of the blower 14.

The openings 10b to 10e on the way from the frontage 10a to the opening 10f used for cleaning work are closed with a shielding plate 30 or the like.

A compressor 8118 for producing high-pressure air is also prepared, and a thin air hose 20 is connected to its discharge port.

A nozzle head 22 is attached to the tip of this air hose 20, and this nozzle head 22 is inserted into the duct 1 from the opening 10f.
Insert within 0.

FIG. 2 is a detailed view of the nozzle head 22. As shown in FIG.

The nozzle head 22 consists of a square hollow box with casters 32 attached to the bottom, and slit-shaped injection ports 28 are formed on both the upper and lower sides and the left and right sides of the box. When compressed air from the compressor 18 is forced into the nozzle head 22 through the air hose 20, the compressed air is vigorously injected from the injection port 28 toward the inner wall of the duct diagonally forward.

This jet is directed from the entire circumference of the nozzle head 22 to the entire circumferential surface of the duct. Further, an operating rod 24 is connected to the nozzle head 22 in order to sequentially feed the nozzle head 22 into the duct 10. For example, the operating rod 24 connects a rod of 1 m unit to the joint 26.
The configuration is such that they are connected sequentially.

P in FIG. 1 is a worker, and this worker P feeds the nozzle head 22 into the duct 10.

In the above configuration, when the blower 14 is first operated, air in the duct 10 is sucked into the blower 14 through the opening 10a and the suction hose 12, and is further discharged to the dust filter 16 side. This creates a negative pressure inside the duct 10, but this alone does not provide sufficient air volume and wind speed to remove dust and the like inside the duct. Therefore, the blower 14 is operated and the compressor 18 is operated to supply high-pressure air into the duct 10 through the air hose 20 and forcefully inject it from the injection port 28 of the nozzle head 22 toward the oblique front force. When high pressure air is injected into the duct 10 under negative pressure by the blower 14, a secondary airflow is induced and the opening 10f
Air is forcefully sucked in from the opening 10a, creating a high-speed airflow toward the opening 10a.

In this way, the synergistic effect of the negative pressure and the high-speed air injection generates a sufficiently large airflow in terms of both air volume and wind speed, and the high-pressure air hits the inner circumferential wall of the duct with a strong impact force. Dust and the like that have adhered and accumulated inside are removed and guided from the blower 14 to the dust filter 16.

As described above, the nozzle head 22 is slowly moved to the left from the opening 10f, and cleaning is performed to the extent that the operating rod 24 can be operated from the opening 10f.

If the nozzle head 22 moves to the left side of the opening 10c, for example, the shielding plate 30 may be removed, and the operator P can move the nozzle head 22 further from the opening 10c.
It can be operated from 0c.

The high-pressure air injected from the nozzle head 22 not only induces the above-mentioned high-speed airflow, but also directly removes adhering dust by colliding the high-speed air discharged from the injection port 28 with the inner wall of the duct 10. It has a positive effect.

FIG. 3 shows an embodiment in which a vertical duct 40 is cleaned by the method of the present invention. The lower end of the vertical duct 40 to be cleaned is connected to an air conditioner 44 through a duct 42, and a plurality of horizontal horizontal ducts 10 are branched from the middle of the vertical duct 40. In this embodiment, the cleaning work is performed from the opening 40b at the upper end of the vertical duct 40 toward the opening 40a at the lower end. A branching opening with the horizontal duct 10 in the middle of this cleaning section is closed with a shielding plate 30.

Similar to the embodiment shown in FIG. 1, the opening 40a and the suction port of the blower 14 are connected by the suction hose 12, and the dust filter 16 is attached to the exhaust port of the blower 14.

A nozzle head 22 is attached to the tip of an air hose 20 connected to the discharge port of the compressor 18.
is inserted into the vertical duct 40 through the opening 40b and slowly lowered. By operating the blower 14 and compressor 18, a high-speed airflow from top to bottom is generated in the vertical duct 40, as in the previous embodiment, and this airflow removes dust attached to the duct 40, and the dust filter Leads to 16.

FIG. 4 shows details of the nozzle head 22 in the embodiment of FIG. This nozzle head 22 consists of a cylindrical hollow container, an air hose 20 is connected to its upper end surface, and a slit-shaped injection port 28 is provided on its circumferential surface. The compressed air sent through the hose 20 is ejected from this injection port 28 toward the inner wall surface of the duct diagonally downward. Also, three guide arms 46 are attached radially at equal intervals on the surface of the nozzle head 22. An O-roller 48 is rotatably attached to the tip of each arm 46. When the nozzle head 22 is inserted into the vertical duct 40, the rollers 4 at the tips of the three guide arms 46
8 is substantially in contact with the inner wall of the duct, so that the nozzle head 22 is located substantially at the center within the duct.

By the way, if the diameter of the duct to be cleaned is very large, the worker must enter the duct and use the air hose 20.
You can also carry out cleaning work by holding it in your hand and blowing out high-pressure air from its tip.

(Effects of the Invention) As explained in detail above, the method for cleaning an air conditioning duct according to the present invention uses a blower to generate negative pressure in the duct, and then passes high-pressure air produced by a compressor into the duct through an air hose. A part of it is blown onto the inner wall of the duct, and the synergistic effect of these forces creates an airflow with sufficient air volume and speed within the duct, causing it to adhere to the inside of the duct.
Since the accumulated dust is guided to the dust collection filter on the blower side, there are very few restrictions on the size and structure of the duct, making it an extremely versatile method, and the equipment used is not very large, so it is easy to use. It can be implemented. Of course, since the inside of the duct is cleaned with sufficient high-speed airflow,
The cleaning effect is extremely high compared to cleaning methods that use airflow from an air conditioner.

[Brief explanation of drawings]

Fig. 1 is an explanatory diagram when the method of the present invention is applied to a horizontal duct, Fig. 2 is a detailed view of the nozzle head 22 in Fig. 1, and Fig. 3 is an illustration when the method of the present invention is applied to a vertical duct. FIG. 4 is a detailed view of the nozzle head 22 in FIG. 3. 10... Horizontal drawing duct 10a-10f... Opening 12... Suction hose 14... Air blower 16... Dust collection filter 1
8...Compressor 20...Air hose 22...Nozzle head 28...Injection port 30...Shielding plate 40...Vertical duct 40...Vertical duct Patent applicant Tsuru Sakakura Rihito Patent attorney - Kensuke Shiro Figure 2 0 Figure 4

Claims (1)

[Claims] (1) A method for cleaning an air conditioning duct, characterized in that dust adhering to and staying inside the air conditioning duct is removed by each of the following means a to d: a... of the section of the air conditioning duct to be cleaned. Connect a suction hose to one end; b... Connect the suction hose to the suction port of a blower, attach a dust filter to the exhaust port of the blower, and create negative pressure in the duct by operating the blower; c. ...Closing the opening in the duct on the way from the connection point of the suction hose to the opening at the other end of the cleaning section; d...Inserting the air hose into the duct from the opening at the other end, and filling it with a compressor. The high-pressure air is ejected into the duct through the air hose and a portion of it is blown against the inner wall of the duct to generate a high-speed airflow in the duct toward the suction hose, and this high-speed airflow removes dust and the like. and guide it to the above dust collection filter.