Two-stage series connection noise reduction structure and extractor hood with same

A noise reduction, fan technology, applied in the fields of oil fume removal, household heating, lighting and heating equipment, etc., can solve the problems of performance degradation, large internal resistance loss of fan system, and increased noise, etc., to reduce disturbance, increase flow, Noise reduction effect

Pending Publication Date: 2019-07-09
NINGBO FOTILE KITCHEN WARE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The combination of the primary and secondary fans has not been scientifically designed, resulting in a large loss of internal resistance of the fan system, reduced performance, and increased noise

Method used

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  • Two-stage series connection noise reduction structure and extractor hood with same
  • Two-stage series connection noise reduction structure and extractor hood with same
  • Two-stage series connection noise reduction structure and extractor hood with same

Examples

Experimental program
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Embodiment Construction

[0019] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0020] Such as Figure 1-7 As shown, a range hood includes a fume collecting hood 1 and a casing 10 arranged above the fume collecting hood 1. The casing 10 is respectively provided with a fan system 3, and the fan system 3 includes a primary fan 31 and a secondary fan 31. fan 32, and the secondary fan 32 is arranged above the primary fan 31. The primary fan 31 and the secondary fan 32 are both centrifugal fans, wherein the secondary fan 32 is arranged obliquely forward, with its air inlet 321 facing forward, and the primary fan 31 is a double-inlet centrifugal fan, and the primary fan 31 is vertically arranged , and its air inlet 311 faces the left and right directions, and forms air inlet gaps 34, 35 with the left and right side plates of the casing 10, respectively. The air outlet 312 of the primary fan 31 is communicated with the air inl...

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PUM

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Abstract

The invention relates to a two-stage series connection noise reduction structure, including a primary fan and a secondary fan arranged above the primary fan. An air outlet of the primary fan is in communication with an air inlet of the secondary fan through a connection section. The primary fan and the secondary fan are centrifugal fans and are characterized in that with a normal plane of an air flow formed between the air outlet of the primary fan and the air inlet of the secondary fan as a reference, the projection of a main air inlet area of the secondary fan on the normal plane has an overlapping area with the projection of the air outlet of the primary fan on the normal plane. According to the two-stage series connection noise reduction structure, the length and tortuosity of the connection section are reduced effectively so that out air of the primary fan is directly connected to a main exhaust area of the air outlet of the secondary fan, the internal resistance between the two-stage fans is reduced, and turbulence of airflow is reduced, the flow rate of a fan system is increased, and noise is reduced.

Description

technical field [0001] The invention relates to the field of range hoods, in particular to a double-stage series noise reduction structure and a range hood. Background technique [0002] With the popularization of public flues in urban high-rise buildings and the improvement of people's performance requirements for kitchen range hoods, designers have developed a range hood with a two-stage series fan structure on the basis of traditional range hoods. Due to the relay effect of the two-stage fan, this kind of range hood greatly improves the exhaust capacity of the range hood, so that it can discharge more flow under the condition of higher flue resistance. However, in an environment with low resistance, the performance advantage of this method is not obvious, and the noise is large, the sound quality is poor, and the user experience is poor. Therefore, on the basis of the existing two-stage series range hood, it is necessary to develop a range hood that can maintain excellen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F24C15/20
CPCF24C15/20
Inventor 孙佳琪胡泽元李晓强施旭娜
Owner NINGBO FOTILE KITCHEN WARE CO LTD
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