Negative-pressure fan

A negative pressure fan and air inlet technology, applied in mechanical equipment, machines/engines, liquid fuel engines, etc., can solve problems affecting fan and motor work, etc., to reduce wind noise, prolong service life, and reduce strength. effect with speed

Inactive Publication Date: 2013-05-15
昆山俊润通风降温设备有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a negative pressure fan with a filter screen at the air inlet, which is used to solve the problem that foreign matter enters the air inlet of the negative pressure fan and affects the operation of the fan and the motor

Method used

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Embodiment Construction

[0018] The present invention will be described in detail below in conjunction with the implementations shown in the drawings, but it should be noted that these implementations are not limitations of the present invention, and those of ordinary skill in the art based on the functions, methods, or structural changes made by these implementations Equivalent transformations or substitutions all fall within the protection scope of the present invention.

[0019] refer to figure 2 and image 3 as shown, figure 2 and image 3 They are respectively a perspective view and a cross-sectional view of a specific embodiment of the present invention. The negative pressure fan 10 of the present invention includes: a housing 1 , a motor 2 , fan blades 3 , a transmission shaft 4 and a filter screen 5 . The motor 2 and the fan blade 3 are respectively located in the air inlet 11 and the air outlet 12 at both ends of the casing 1 , and are connected through the transmission shaft 4 . When t...

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Abstract

The invention provides a negative-pressure fan. The negative-pressure fan comprises an outer shell, a motor, fan blades and a transmission shaft, wherein the motor and the fan blades are respectively arranged in an air inlet and an air outlet at two ends of the outer shell and are connected through the transmission shaft. The fan blades are driven to rotate by the motor through the transmission shaft, and an effect of negative-pressure air exchange is achieved. A filter screen is arranged on the position of the air inlet of the outer shell. When the fan works, the filter screen is capable of filtering relatively small sundries such as dust and fibers so as to protect the fan blades and the motor from corrosion and further prolong the service life of the negative-pressure fan. Simultaneously a porous structure of the filter screen is capable of relieving intensity and speed of air currents exhausted by the negative-pressure fan, reducing wind cutting noise of the fan blades, and lowering wind cutting resistance of the fan blades so as to prolong the service life of the fan blades.

Description

technical field [0001] The invention relates to a negative pressure fan, in particular to a negative pressure fan with a filter screen at the air inlet. Background technique [0002] Negative pressure fans use the principle of air convection and negative pressure ventilation to naturally inhale fresh air from the opposite side of the installation site --- the door or window, and at the same time quickly force the indoor stuffy air out of the room to achieve cooling and cooling effects. kind of machine. Because of its low investment cost (the one-time investment is only one-sixth of the air conditioner), large air volume (the air change rate can reach 99%), low noise, and low energy consumption (the operating cost is only one-tenth of the air conditioner) , stable operation, long life and high efficiency, so it has been used by more and more industrial and mining plants, and it is also a good choice for cooling and ventilation in modern workshops. In particular, safe, envir...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04D25/08F04D29/70
Inventor 吕学兵
Owner 昆山俊润通风降温设备有限公司
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