Ventilation fan

A technology of ventilating fans and fan blades, applied in the field of ventilating fans, can solve the problems affecting the air volume, noise, static pressure, and vibration of the machine, and achieve the effect of preventing vibration.
CN101285477AInactive Publication Date: 2008-10-15PANASONIC ECOLOGY SYSTEMS GUANGDONG CO LTD
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Patent Information

Authority / Receiving Office
CN Β· China
Current Assignee / Owner
PANASONIC ECOLOGY SYSTEMS GUANGDONG CO LTD
Publication Date
2008-10-15
Estimated Expiration
Not applicable Β· inactive patent

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Abstract

The invention relates to a ventilating fan. The ventilating fan comprises a frame and a hodmadod which is provided with a motor with fan blades; a wind outlet of the hodmadod is provided with an on-off curtain which is fixed on the wind outlet of the hodmadod by a shaft; the outer side of the shaft is provided with an iron block for making the on-off curtain in a closed state; the outer side of the hodmadod is provided with an electromagnet; when the ventilating fan operates, the electromagnet attracts the iron block and keeps an open state of the on-off curtain; the ventilating fan can effectively prevent the on-off curtain from vibrating, thereby not influencing the performances of input air, noise and static pressure, etc. of the machine.
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Description

technical field

[0001] The invention relates to a ventilation fan. Background technique

[0002] Such as figure 1 As shown, the known ventilation fan 100 includes a frame 10, a snail shell 20, a motor (not shown) with fan blades 70 is housed in the snail shell, and a switch curtain 40 is provided at the air outlet 21 of the snail shell 20, and the switch curtain 40 It is fixed at the air outlet 21 of the snail shell 20 by a shaft 50, and the outside of the shaft 50 is provided with an iron block 60 for closing the switch curtain 40. When the fan blade 70 rotated, the switch curtain 40 was blown open by the wind, and the indoor air was discharged to the outside. When the fan blade 70 stopped rotating, the switch curtain 40 was closed under the action of the iron block 60 gravity.

[0003] The above structure has the following disadvantages: when the wind force changes, the opening and closing state of the opening and closing curtain will change accordingly, and vibration wi...

Claims

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