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Noise reducing impeller and range hood applying impeller

A range hood, noise reduction technology, applied in the application, removal of oil fume, components of pumping devices for elastic fluids, etc., to achieve the effect of eliminating flow noise and reducing operating noise

Active Publication Date: 2017-04-19
NINGBO FOTILE KITCHEN WARE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the formation of two oil fume channels, the oil fume enters the fan from the front and rear air inlets, and the noise of the range hood mainly comes from the inside of the centrifugal fan, so the centrifugal fan will go out through the two air inlets during operation. radiated loud noise

Method used

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  • Noise reducing impeller and range hood applying impeller
  • Noise reducing impeller and range hood applying impeller
  • Noise reducing impeller and range hood applying impeller

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Embodiment Construction

[0022] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0023] Such as figure 1 and figure 2 As shown, the noise reduction impeller 5 in this embodiment includes a middle plate 51 and blades installed on the middle plate, wherein the blades include front blades 52 arranged on the front side of the middle plate and rear blades 52 arranged on the rear side of the middle plate. For the side blades 53, the front blades 52 are shorter and the rear blades 53 are longer, and the front blades 52 and the rear blades 53 can adopt an integral structure or a split structure. Noise reduction holes 54 are opened on the front blade 52 , and the noise reduction holes 54 are arranged in rows along the length direction of the front blade 52 , and at least three rows of noise hole rows are distributed on one front blade 52 .

[0024] In this embodiment, five rows of noise reduction holes are arranged on one front ...

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Abstract

The invention discloses a noise reducing impeller and a range hood applying the impeller. The noise reducing impeller is provided with a noise reducing hole in a front side blade of a middle disc; a fan intake port of the range hood is a back intake port formed in a volute back side plate; a volute front side plate is provided with a front ventilation port communicated with a fan exhaust port; the front ventilation port and the back intake port are separated through the middle disc of the noise reducing impeller; and a noise reducing cavity communicated with the front ventilation port is formed in front of the fan or in front of and below the fan. The noise reducing impeller is provided with the noise reducing hole in the front side blade of the middle disc for reducing the operation noise; in addition, the range hood adopts a back side intake mode, and the noise reducing cavity is formed in the front side of the fan, so that lampblack can be prevented from sucking by the front ventilation port from the lower side of a hood, the disordered flowing noise of air currents in the front side space of a fan cover is eliminated, and meanwhile, the path of outwards propagating the noise through the front side of the fan cover can be stopped; and under the condition of high resistance of a public flue, the noise reducing cavity also can achieve a pressure relief effect.

Description

technical field [0001] The invention relates to a range hood, in particular to a noise reduction impeller and a range hood using the impeller. Background technique [0002] At present, most of the existing European-style range hoods do not have a noise-reducing structure inside the air duct. When the fan rotates, the powerful airflow directly rushes into the air duct, which easily forms eddies or turbulence in the upper space of the air inlet. Make the range hood louder. There are also range hoods that set a partition at the air inlet of the fan, so that the oil fume enters the air inlet of the fan after passing through the partition. The installation of the partition has a certain effect on improving the oil filtering effect, but it is easy to generate additional noise caused by the airflow blowing the partition. In addition, range hoods that can reduce noise have also been disclosed in the prior art, such as the "Rectification and Noise Reduction Type Range Hood" disclose...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F24C15/20F04D29/26F04D29/66
CPCF04D29/281F04D29/30F04D29/666F24C15/20
Inventor 任树栋陈漪马晓阳李斌茅忠群诸永定
Owner NINGBO FOTILE KITCHEN WARE CO LTD
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