Dual-air-inlet centrifugal draught fan and extractor hood

A centrifugal fan, double air inlet technology, applied in the removal of oil fume, machine/engine, mechanical equipment, etc., to achieve the effect of reducing operating noise

Active Publication Date: 2018-11-23
GUANGDONG HISENSE HOME APPLIANCES CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The invention provides a double-inlet centrifugal fan and a range hood, which are used to solve the problem of how to reduce the operating noise of the double-inlet centrifugal fan

Method used

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  • Dual-air-inlet centrifugal draught fan and extractor hood
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  • Dual-air-inlet centrifugal draught fan and extractor hood

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Embodiment Construction

[0034] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0035]In describing the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", The orientations or positional relationships indicated by "top", "bottom", "inner", "outer", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than ind...

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PUM

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Abstract

The invention discloses a dual-air-inlet centrifugal draught fan and an extractor hood, and relates to the technical field of extractor hoods. The aim of how to reduce the running noise of the dual-air-inlet centrifugal draught fan is achieved. The dual-air-inlet centrifugal draught fan comprises a volute and a dual-air-inlet impeller, the volute comprises a front cover plate, a rear cover plate and a volute surrounding plate, the front cover plate and the rear cover plate are provided with air inlets, an air outlet channel is connected to the volute surrounding plate, a volute tongue is arranged at the corner between the air outlet channel and the volute surrounding plate, the edge line of the volute tongue is the convex line protruding in the direction away from the root of the volute tongue, the edge line of the volute tongue comprises a first edge line segment and a second edge line segment which are sequentially connected from the front cover plate and the rear cover plate, from the front cover plate to the rear cover plate, the first edge line segment extends in the direction away from the tongue root, the second edge line segment extends in the direction close to the tongueroot, and the first edge line segment and the second edge line segment are convex lines protruding out of the volute tongue. The dual-air-inlet centrifugal draught fan is used for driving gas flowing

Description

technical field [0001] The invention relates to the technical field of range hoods, in particular to a double-inlet centrifugal fan and a range hood. Background technique [0002] Range hoods, air purifiers, computer room air conditioners and other equipment are all equipped with centrifugal fans. The operating noise of the centrifugal fans directly determines the operating noise of the equipment, and the operating noise of the equipment affects the comfort of the environment, especially such as range hoods. , air purifiers and other household equipment. [0003] example, figure 1 and figure 2 It is a centrifugal fan commonly used in the prior art, such as figure 1 and figure 2 As shown, the centrifugal fan includes a volute 01 and an impeller (not shown in the figure) arranged in the volute 01, a volute tongue 02 is provided at the exit of the volute 01, and the edge line 03 of the volute tongue 02 is aligned with the impeller. In this way, the axial uneven airflow f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04D29/66F04D29/42F24C15/20
CPCF04D29/4233F04D29/663F24C15/20
Inventor 杨川余源浩
Owner GUANGDONG HISENSE HOME APPLIANCES CO LTD
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