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Ventilation fan

A ventilation fan and fan blade technology, applied in the field of ventilation fans, to achieve the effect of preventing vibration

Inactive Publication Date: 2010-12-15
PANASONIC ECOLOGY SYSTEMS GUANGDONG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[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 will inevitably occur, which will affect the Air volume, noise and static pressure performance of the machine

Method used

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  • Ventilation fan
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Examples

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Effect test

Embodiment Construction

[0022] like figure 2 As shown, the ventilation fan 100 of the first embodiment of the present invention includes a frame 10, a snail shell 20, a motor (not shown) with fan blades 70 is housed in the snail shell 20, and a switch is provided at the air outlet 21 of the snail shell 20. Curtain 40. The switch curtain 40 is fixed at the air outlet 21 of the snail shell 20 by a shaft 50, and the iron block 60 that makes the switch curtain in a closed state is arranged on the outside of the shaft 50, and the iron block 60 rises to the horizontal position corresponding to the outside of the snail shell 20 A supporting device 90 is provided, and the electromagnet 80 is clamped therein. The supporting device 90 can prevent the electromagnet 80 from falling off due to repeated attraction.

[0023] After electrification, the fan blade 70 rotates to blow open the switch curtain 40, and the shaft 50 rotates thereupon to drive the iron block 60 to rise to the position of the electromagnet...

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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.

Description

technical field [0001] The invention relates to a ventilation fan. [0002] Background technique [0003] like 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. [0004] 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 vibra...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04D25/14F04D29/42F04D27/00
Inventor 曾西泉
Owner PANASONIC ECOLOGY SYSTEMS GUANGDONG CO LTD
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