JP2000186697A - Air blower - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent air from blowing back from a fan circumferential edge, and improve air blow efficiency by arranging a frame enclosing a circumference on a propeller fan wherein a device such as a filter of a load with respect to the pass of air is arranged on a downstream side, and arranging a cover for covering a circumference of the fan on its upstream side. SOLUTION: A propeller fan 1 to which a motor 2 is attached is enclosed with a frame 3, and air supplied with rotation of the fan 1 flows out to an outside after it is filtered with a filter 5 as a device of a load with respect to the pass of air. In this case, a cover plate 6 is covered on an upstream side of the fan 1 so as to enclose a circumference of the fan enclosed by the frame 3, and a filter 5 in which a filter element folded on the frame is stored is disposed on the downstream side of the fan 1. The cover plate 6 for covering the circumference is merely disposed on an upstream side of the fan 1, air is prevented from blowing back from the circumferential edge of the fan 1, and an air blowing efficiency is improved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a blower having a propeller type fan and, more particularly, to a HEPA downstream.
Filters such as filters, catalyst devices, and adsorption devices are blown back to the suction port side from the peripheral edge of the propeller-type fan that is produced when air is blown by a blower having a propeller-type fan to devices that load the airflow. The present invention relates to a blower that prevents wind.

[0002]

BACKGROUND OF THE INVENTION Conventionally, filters such as HEPA filters,
Turbo fans, sirocco fans, and the like have been used for blowing air to catalyst devices, adsorption devices, and the like. An air purifier using a HEPA filter is used for purifying air in a clean room for manufacturing semiconductors, liquid crystal display devices and the like. Each of these clean rooms is provided with a booth to which air in the clean room is filtered by a filter device and further purified air is supplied.

[0003] Filter devices for filtering air supplied to these booths do not bring dust into the booths.
The blower which has a high possibility of generating dust is arranged on the upstream side of the filter element.

[0004] The filter device provided in the booth is downsized,
In order to reduce the cost, the present inventor tried using a propeller type fan blower instead of a conventionally used turbo fan blower and sirocco fan blower as a blower of the filter device, but a blower having a propeller type fan was used. It has been found that when used, air that cannot pass through the filter element blows out from the periphery of the fan despite being blown by the fan.

[0005] The air blown out from the peripheral edge of the fan is accompanied by dust accumulated on the filter element, causing a problem that the clean room is contaminated. In addition, the blown-out air has an adverse effect on equipment placed near the filter device.

FIG. 3 is an explanatory view for explaining the air blown out from the peripheral edge of the fan.
Denotes a propeller type fan blower, and 102 denotes a filter having a folded filter element. From the periphery of the fan, air that has not passed through the filter serving as a load is blown back as indicated by arrow a.

[0007]

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide an air blower in which air is not blown back from the peripheral edge of the fan and is blown by a propeller type fan provided with a load device on the downstream side. It is in.

[0008]

SUMMARY OF THE INVENTION The object of the present invention is to provide: (1) a blower for blowing air by a propeller-type fan provided with a device serving as a load on the passage of air downstream; And a cover surrounding the periphery of the propeller-type fan is provided upstream of the propeller-type fan. (2) The blower according to (1), wherein the load device is a filter. Achieved by

Hereinafter, the present invention will be described with reference to the drawings.
The following description does not limit the blower of the present invention.

FIG. 1 is a front view of a blower of the present invention, and FIG. 2 is a sectional view of the blower of the present invention. 1 and 2, 1 is a propeller fan, 2 is a motor, 3 is a frame surrounding the propeller fan, 4 is a column, 5 is a filter, and 6 is a cover plate. The propeller-type fan 1 attached to the motor 2 is surrounded by a frame 3 so that air sent by the fan is efficiently sent to the filter 5.
The motor 2 is fixed to the frame 3 by columns 4. Also,
A cover plate 6 is attached to the upstream side of the propeller fan 1, and a filter 5 containing a filter element folded in a frame is attached to the downstream side. The cover plate 6 is provided so as to cover the periphery of the propeller fan 1 surrounded by the frame 3. It is considered that air that cannot be passed through the filter serving as a load blows back from the peripheral edge of the fan, so the air from the peripheral edge of the fan is blown back from the peripheral edge of the fan. It is unclear why the blowout from the peripheral edge of the fan can be prevented only by providing the fan, but it is thought that the blowing pressure increases by covering the periphery of the propeller fan. In the above description, an example was described in which a filter was provided downstream of the propeller-type fan. However, when a device such as a catalyst device or an adsorption device, which is a load for the flow of air, is provided, similarly, the air blows from the peripheral edge of the fan. Return can be prevented.

[0011]

According to the blower of the present invention, there is no blowback of air from the periphery of the fan, and the blower efficiency can be improved.

[Brief description of the drawings]

FIG. 1 is a front view of a blower of the present invention.

FIG. 2 is a sectional view of a blower of the present invention.

FIG. 3 is an explanatory diagram illustrating air blown out from a peripheral edge of a fan.

[Explanation of symbols]

 1 Propeller type fan 3 Frame surrounding propeller type fan 5 Filter 6 Cover plate

Claims (2)

[Claims] 1. A blower for blowing air by a propeller-type fan provided with a device acting as a load on the passage of air on the downstream side, wherein a frame surrounding the periphery is provided on the propeller-type fan, and an upstream side of the propeller-type fan is provided. A blower, wherein a cover for covering the periphery of the propeller fan is provided on the side. 2. The blower according to claim 1, wherein the load device is a filter.