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Forward-curved type fan blade, impeller and centrifugal fan

A curved, fan blade technology, applied in the field of fans, can solve the problems of small air output, increased airflow resistance, increased fan operating noise, large fluidity and airflow resistance, etc., to improve air output efficiency and reduce surge. Effect

Pending Publication Date: 2019-12-13
FOSHAN CITY NANHAI POPULA FAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the traditional traditional centrifugal fan, the front plate of the impeller of the fan also adopts a conical and single arc structure, and the blades adopt a single arc shape and narrow flow channel. The fluidity and airflow resistance of the air inlet are large, resulting in the flow eddy current noise of the airflow, which is prone to "surge" phenomenon and increases the noise of the fan when it is running

Method used

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  • Forward-curved type fan blade, impeller and centrifugal fan
  • Forward-curved type fan blade, impeller and centrifugal fan
  • Forward-curved type fan blade, impeller and centrifugal fan

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Embodiment Construction

[0023] The idea, specific structure and technical effects of the present invention will be clearly and completely described below in conjunction with the embodiments and accompanying drawings, so as to fully understand the purpose, features and effects of the present invention. Apparently, the described embodiments are only some of the embodiments of the present invention, rather than all of them. Based on the embodiments of the present invention, other embodiments obtained by those skilled in the art without creative efforts belong to The protection scope of the present invention. In addition, all the connection / connection relationships mentioned in this article do not refer to the direct connection of components, but mean that a better connection structure can be formed by adding or reducing connection accessories according to specific implementation conditions. The various technical features in the invention can be combined interactively on the premise of not conflicting wi...

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Abstract

The invention discloses a forward-curved type fan blade, an impeller and a centrifugal fan. The forward-curved type fan blade comprises a blade arranged in a circular curve manner. The blade is unfolded; a first rectangular coordinate system is established with an end point of the bottom edge of the blade as the coordinate origin; the abscissa axis of the first rectangular coordinate system is thestraight line where the bottom edge of the blade is located after the blade is unfolded; points are sequentially taken in the first rectangular coordinate system; the adjacent points are connected through smooth lines; and an unfolding drawing of the blade is formed by the abscissa axis of the first rectangular coordinate system and the smooth connection lines of the adjacent points. By means ofthe arrangement of the structure, the air discharge efficiency of forward-curved type draught fans can be effectively improved, and surge of the forward-curved type draught fans can be reduced.

Description

technical field [0001] The invention relates to a fan, in particular to a forward-curved fan blade, an impeller and a centrifugal fan. Background technique [0002] In the traditional traditional centrifugal fan, the front plate of the impeller of the fan also adopts a conical and single arc structure, and the blades adopt a single arc shape and narrow flow channel. The fluidity and airflow resistance of the air intake are large, resulting in the flow eddy current noise of the airflow, which is prone to "surge" phenomenon and increases the noise of the fan when it is running. Contents of the invention [0003] The technical problem to be solved by the present invention is to solve at least one of the above-mentioned problems. [0004] The solution that the present invention solves its technical problem is: [0005] A forward-curved fan blade, including blades, the blades are arranged in a circular arc curve, the blades are unfolded, and a first rectangular coordinate sys...

Claims

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Application Information

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IPC IPC(8): F04D29/30F04D29/42F04D29/66
CPCF04D29/30F04D29/4226F04D29/666
Inventor 付观井唐秀文
Owner FOSHAN CITY NANHAI POPULA FAN