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Wind pressure type ventilation fan

A ventilation fan and wind pressure technology, which is applied to non-variable pumps, components of pumping devices for elastic fluids, machines/engines, etc., can solve problems such as manufacturing costs and reliability issues

Active Publication Date: 2018-12-11
江门市金羚排气扇制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For this reason, the area below the horizontal axis of the baffle is usually designed to be larger than the area above the horizontal axis, but this will cause the moment of gravity of the baffle below the horizontal axis to be greater than the moment of gravity above the axis. Set enough counterweight or use a tension spring to balance the difference of the weight moment, which brings manufacturing cost and reliability problems

Method used

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Embodiment Construction

[0018] Ventilation fan structure of the present invention such as Figure 1-7 As shown, it is mainly improved on the basis of the traditional wind pressure ventilation fan disclosed in CN203670297U, and the inherited design includes:

[0019] - take the cylindrical air duct 2 as the frame;

[0020] - the electric motor 6 fixedly supported in the air duct 2;

[0021] - the axial flow impeller 5 installed on the motor 6 shaft;

[0022] ——The grille-shaped panel 1 covering the air inlet plays the role of mechanical hazard protection and decoration.

[0023] - On the left and right side walls of the inner cylindrical surface of the upper half of the air duct 2, a fixed shaft protruding inward is formed along the horizontal axis, the left fixed shaft 21 is shown in the figure, and the right fixed shaft is not shown in the cross-sectional view;

[0024] - An injection-molded thin-plate-shaped baffle 3, whose outer peripheral shape is the inner section of the air duct 2, correspon...

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PUM

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Abstract

The invention relates to a wind pressure type ventilation fan. The ventilation fan comprises a motor fixed to a rack, an impeller driven by the motor, an air outlet and a shielding mechanism of the air outlet; the shielding mechanism comprises a baffle, wherein the baffle covering the air outlet is supported on a first hinge on the side wall of the air outlet along a first horizontal axis, a venthole is formed in the portion, above the first horizontal axis, of the baffle, and a baffling piece covering the vent hole in shape is supported on a second hinge on the side wall of the vent hole along a second horizontal axis. According to the ventilation fan, the opening moment of the baffle which is blown by airflow and rotates around the first horizontal axis of the first hinge can be increased, so that balance arrangement of baffle counterweights and the like is reduced or even eliminated; the structure is simplified, and the cost is reduced.

Description

technical field [0001] The invention relates to a wind pressure ventilation fan, in particular to a baffle plate of its shielding mechanism, and its IPC classification can belong to F04D29 / 54. Background technique [0002] The wind-pressure ventilation fan is used to shield the baffle from the external airflow when it is not working, and is opened by rotating around the horizontal axis under the blowing of the airflow driven by the ventilation fan. The traditional design of the baffle is blown by the airflow, and the moment below the horizontal axis is greater than the moment above the horizontal axis, so that the baffle opens forward and upward and rearward below the horizontal axis. For this reason, the area below the horizontal axis of the baffle is usually designed to be larger than the area above the horizontal axis, but this will cause the moment of gravity of the baffle below the horizontal axis to be greater than the moment of gravity above the axis. Set enough coun...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04D29/56
CPCF04D29/563
Inventor 区长钊
Owner 江门市金羚排气扇制造有限公司