JPH1089738A - Ventilation fan and its drive method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To purify the outside air without cleaning or exchanging a filter for a long time by temporarily exposing a part or a whole part of a dust- collecting filter including a lower part of the dust-collecting filter of inertial separation type to a gas inlet side of a suction passage. SOLUTION: A round pipe sleeve 3' is provided in a hole 2 of a wall 1 on which a ventilation fan 8 is provided, and the pipe sleeve 3' is provided with a propeller fan 4 and a dust-collecting filter 9 of inertia separation type. A lower end of the dust-collecting filter 9 is exposed to the outside of a gas inlet 10 of the pipe sleeve 3' to keep the lower end of the dust-collecting filter 9 in an open condition 9. The air supply 13 is generated by turning the propeller fan 4 in the reverse direction, a part of the dust is discharged as the air 14 containing the dust, and a part of the air supply 13 is discharged as the filter- cleaned air 15 outside the gas inlet 10 through the dust-collecting filter 9. The outside air can be purified without cleaning or exchanging the dust-collecting filter 9 for a long time.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a ventilation fan for a building, a car interior, a cabin of a ship, and a cargo compartment.

[0002]

2. Description of the Related Art Conventionally, a ventilation blower having a structure shown in FIG. 5 has been generally used. A hole (2) is drilled in the wall (1) and passed through a pipe sleeve (3) with a propeller fan (4) therein. Most of the dirt on the outside air (5) is removed by the air filter (6), and clean gas is sent into the room. An air supply (7) passes through the hole. Thus, a ventilation blower (8) is formed. As a specific example of the conventional ventilation blower, Mitsubishi Electric Corporation Nakatsugawa Works (1-3, Komabacho, Nakatsugawa City, Gifu Prefecture) is 199.
"Mitsubishi ventilation blower new product NEWS" created in March 2006
No. 5 "V-08PQUK. V-
08PQUAK uses a polypropylene nonwoven fabric filter as an air filter.

[0003]

In a conventional ventilated blower, dust and dirt contained in the outside air are trapped and held by the air filter. Therefore, in a ventilated blower used for a certain period of time, the dust and dust are always captured and held by the air filter. Outside air is introduced into the room through dust and dirt. That is, in the conventional ventilation blower, the operation of purifying the outside air with the air filter and the operation of contaminating the air filter with dust and dirt are performed simultaneously. If the dust and dirt caught and held by the air filter subsequently contain moisture, it becomes a hotbed that increases mold and harmful microorganisms.Therefore, there is a case where the air filter is provided to contaminate the outside air and take it in the room. Had a problem. In addition, the air filter has an effect of lowering the conductance with respect to the air blowing, and the conductance further decreases as the amount of dust and dust captured and held increases.
At the same time, there was a problem of imposing a burden on the blowing capacity of the ventilation blower.

[0004]

SUMMARY OF THE INVENTION The ventilation blower of the present invention comprises:
In addition to providing at least a propeller fan and an air filter in an intake passage having a gas inlet and a gas outlet, the air filter is an inertia separation type dust filter and the dust collector including a lower portion of the dust filter. Part or all of the dust filter is temporarily exposed to the gas intake side of the intake passage, or, in addition, the dust filter is hinged at an upper portion thereof to the intake passage. The driving method of the ventilation blower according to the present invention, in addition to the provision of at least a propeller fan and an air filter in an intake passage having a gas inlet and a gas outlet, the air filter is an inertial separation type dust collecting filter. Part or all of the dust filter including the lower portion of the dust filter is temporarily located on the gas intake side of the intake passage. The propeller fan of the ventilating blower generates a reverse wind from the gas outlet to the gas intake by the propeller fan, and the reverse wind temporarily exposes part or all of the dust collection filter to the gas intake side of the intake passage. It is characterized by doing.

[0005]

The dust separation filter of the inertia separation type utilizes the effect that dust contained in the gas flowing into the filter from the gas intake side of the filter collides with the wall surface inside the filter and drops downward. . Lighter gas molecules pass through obstacles in the filter and reach the outlet of the filter, while heavy dust collides with the obstacles due to their strong inertia. This filter is characterized in that dust falls down and accumulates. In the present invention, the dust that has fallen and accumulated is discharged outside by blowing air. The effect of this dust release is to temporarily expose the lower part of the dust collecting filter to the outside on the gas intake side and blow off the accumulated dust to the outside. As the filter moves, gas always passes through the dust collection filter when taking in outside air.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIG. The embodiment shown in FIG. 1 is an example of a ventilation blower in which a through hole is provided in an outer wall of a building to ventilate a room, and a fan generally referred to as a pipe fan is also of this type. FIG. 1 shows an example in which a ventilation blower (8) is provided inside a hole (2) provided in a wall (1) with a round pipe sleeve (3 ') provided therein. Propeller fan (4) for pipe sleeve
And an inertia separation type dust collection filter (9).
The outside air (5) is cleaned by the inertia separation type dust collection filter to remove dusts and become clean air (7) to be taken into the room. The outside air inlet is called a gas inlet (10), and the air outlet is called a gas outlet (11). Examples of the inertia separation type dust collection filter include the inertia separation type dust collection filter disclosed by the present inventors in Japanese Patent Application Laid-Open No. Hei 2-20286, and Japanese Patent Application Laid-Open Nos. 8-80413 and 8-8.
There is a dust filter released in 0414. The filter is fitted with a filter push rod (12). To obtain clean air supply by taking in outside air, the push rod is pulled toward the gas outlet, and the gas inlet is completely covered with a filter. When the outside air collides with the inertial separation type dust collection filter, the dust contained therein is temporarily left in the filter. The dust in the filter falls down due to gravity and is deposited below the filter.

Next, a process of discharging dust accumulated in the filter will be described. In FIG. 1, a reverse wind (13) is generated by rotating the propeller fan in the reverse direction. Immediately after the generation of the headwind, the lower end of the filter is pushed out to the gas extraction port side and exposed by operating the rocking rod and operating the rod. The lower end of the filter is open,
When exposed, dust accumulated on the lower end slides down and is released. Since a headwind is generated in this state, dust remaining in the filter is repelled by the wind in addition to the action of gravity, and discharge is promoted. Part of the released dust becomes dust-containing wind (14). Part of the headwind passes through the filter and is discharged to the outside of the gas outlet as a filter cleaning wind (15). The filter cleaning air emits dirt such as dust stuck in the filter. The ratio of the air volume of the dust-containing air and the air volume of the filter cleaning air depends on the degree of lower end exposure by operating the swinging rod. At the lower end of the gas inlet, an overhang plate (1
6) is provided to reduce contamination of the wall surface with the discharged dust.

FIG. 2 shows a first embodiment of the present invention. The ventilation blower of FIG. 2 is the same as that of FIG. 1 except for the following. In FIG. 2, a hinge (17) is provided at the upper end of the filter, and is semi-fixed so as to be suspended from the inner wall of the pipe sleeve (3 ') as shown. The filter can be operated by rocking the filter from the side of the gas outlet with the filter rocking rod (18). When the outside air is taken in to obtain a clean air supply, the rocking is performed to attract the rod so that the filter completely covers the gas intake. Then, the propeller fan is rotated forward to obtain air supply. At the time of dust emission, the rocking rod is operated to operate the rod to expose the lower end of the filter to the outside of the gas inlet.

A second embodiment according to the second aspect of the present invention will be described. FIG. 3 is the same as FIG. 2 except for the structure shown below. In FIG. 3, a lower filter cover (19) is provided at the lower end of the inertial separation type dust collection filter (9). The lower lid is semi-fixed with a hinge, and covers the lower end of the filter when the filter is housed in the pipe sleeve in the outside air intake state. When exposed, the filter separates from the lower end by gravity. The lower lid has a function of preventing wall surface contamination, which is a function of the overhanging plate in FIG. 2, and a function of promoting dust emission by applying an impact to the filter.

An embodiment corresponding to claim 3 of the present invention will be described with reference to FIG. FIG. 4 is the same as the ventilation blower shown in FIG. 2 except for the features of the structure described below. In FIG. 4, the inertial separation type dust collecting filter (9) is semi-fixed to the pipe sleeve (3 ') by a spring (20). FIG. 4 illustrates the case of dust emission. In the case of dust emission, the reverse rotation of the propeller fan (4) generates a reverse wind (13), and the wind pressure separates the filter from the pipe sleeve and exposes the filter to the outside of the gas inlet (10). Since the upper and lower ends of the filter are open in the state of FIG. 4, the dust-containing wind (14) blows out from below by the wind force due to gravity and the headwind,
Dust-containing wind (14) is blown out from the upper end by the wind force caused by the headwind. The wind that has passed through the filter blows out as a filter cleaning wind (15). In the ventilating blower of FIG. 4, when obtaining the clean air shown in FIG. 1 or the like, the filter is drawn into the pipe sleeve by the forward rotation of the propeller fan (4), and the outside air passes through the filter. The gas is taken out to the gas outlet (11) inside the room.

[0012]

According to the ventilation blower of the present invention, it is possible to purify the outside air and send the air into the room without cleaning or replacing the filter for a long time. Discharge of accumulated dust and cleaning of the filter can be performed without increasing the number of propeller fans and without increasing the inner volume of the pipe sleeve.

[Brief description of the drawings]

FIG. 1 is a sectional view corresponding to a first embodiment of the present invention.

FIG. 2 is a sectional view corresponding to a first embodiment of the present invention.

FIG. 3 is a sectional view corresponding to a second embodiment of the present invention.

FIG. 4 is a sectional view for explaining a third embodiment of the present invention.

FIG. 5 is a sectional view of a conventional example.

[Explanation of symbols]

1 is a wall, 2 is a hole, 3 and 3 'are pipe sleeves, 4 is a propeller fan, 5 is outside air, 6 is an air filter, 7 is air supply, 8 is a ventilation blower, 9 is an inertia separation type dust collection filter,
10 is a gas inlet, 11 is a gas outlet, 12 is a filter push rod, 13 is a reverse wind, 14 is a dust-containing wind, 15 is a filter cleaning wind, 16 is an overhang plate, 17 is a hinge, 18 is a filter swinging rod, 19 Is a filter lower cover, and 20 is a spring.

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Yoshiaki Masuno 4-4-14 Jonan, Fujisawa-shi, Kanagawa Prefecture (72) Inventor Yukihiko Tamura 1366 Tsurugamine Honcho, Asahi-ku, Yokohama-shi, Kanagawa Prefecture (72) Inventor Mitsuo Sugiura Setagaya, Tokyo (15) Inventor Masashi Hasegawa 2-5-1 Akabane Minami, Kita-ku, Tokyo Sankei Giken Kogyo Co., Ltd.

Claims (3)

[Claims] 1. A ventilation blower having at least a propeller fan and an air filter in an intake passage having a gas inlet and a gas outlet, wherein the air filter is an inertia separation type dust collecting filter, and the dust collecting filter is provided. A part or the whole of the dust collecting filter including a lower part of the air vent is temporarily exposed to the gas intake side of an intake passage. 2. A method according to claim 1, wherein said dust collecting filter is hinged at an upper portion thereof to an intake passage. 3. The method of driving a ventilation blower according to claim 1, wherein said propeller fan generates a headwind from a gas outlet to a gas inlet, and said headwind causes a part or all of said dust collection filter to be in an intake passage. The method for driving a ventilation blower, wherein the ventilation blower is temporarily exposed to the gas intake side.