Noise reduction impeller and range hood applying same

A range hood, noise reduction technology, applied in the application, removal of oil fume, household stoves, etc., to achieve the effect of eliminating flow noise

Active Publication Date: 2017-03-08
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 reduction impeller and range hood applying same
  • Noise reduction impeller and range hood applying same
  • Noise reduction impeller and range hood applying same

Examples

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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 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. The inner circumference of the front blade 52 is covered with a mesh cover 54 . The net cover 54 can isolate the flow field of the air inside the impeller, thereby having the effect of reducing noise.

[0021] Such as figure 2 As shown, the outer ring of the front blade 52 is covered with a mesh cover 54, and the rest of the structures are the same...

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Abstract

The invention discloses a noise reduction impeller and a range hood applying the same. According to the noise reduction impeller, outer rings and / or inner rings of front-side blades of a middle disk are covered with net covers, the inner flow field of air can be alienated by the covers, and the noise reduction effect can be realized. An air inlet of a fan of the range hood is a back air inlet formed in a volute back side plate, a front ventilating port communicating with an air outlet of the fan is formed in a volute front side plate, the front ventilating port and the back air inlet are separated from each other through the middle disk of the noise reduction impeller, and a noise reduction cavity communicating with the front ventilating port is arranged in front of the fan or in front of and below the fan. The range hood adopts a back side air inlet manner, after the noise reduction cavity is arranged on the front side of the fan, the front ventilating port can be prevented from sucking in oil fume from the lower side of an oil fume collecting cover, flow noise caused by air flow turbulence in front-side space of an outer cover of the fan is eliminated, meanwhile, the way through which noise propagates outwards from the front side of the outer cover of the fan can be blocked, and besides, under the condition of high resistance of a common flue, the noise reduction cavity can also realize the 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): F24C15/20
CPCF24C15/20
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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