A noise-reducing range hood

A range hood, noise reduction technology, applied in the direction of removing oil fume, household stove/stove, heating method, etc., to achieve the effect of eliminating flow noise, reducing noise, and facilitating volute cleaning
CN106402974BActive Publication Date: 2019-02-15NINGBO FOTILE KITCHEN WARE CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
NINGBO FOTILE KITCHEN WARE CO LTD
Publication Date
2019-02-15

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Abstract

A noise-reducing range hood comprises a draught fan, a draught fan housing and an exhaust fume collecting hood arranged under the draught fan housing. The draught fan comprises a volute, a vane wheel and a motor used for driving the vane wheel, the volute is provided with a volute back side plate and a volute front side plate, and a current collecting ring is installed at an air inlet of the draught fan. The noise-reducing range hood is characterized in that the air inlet is a back air inlet formed in the volute back side plate, a diversion cone is installed on the current collecting ring, the diameters of the diversion cone are gradually increased in the air inlet direction, and the motor is located on the back side portion of the vane wheel and directly faces the diversion cone. Compared with the prior art, the noise-reducing range hood has the advantages that a back side air inlet mode is adopted by the noise-reducing range hood, the diversion cone is installed on the current collecting ring, the motor is arranged on the back side portion of the vane wheel and directly faces the diversion cone, the diversion cone not only can play the role of reducing noise at the air inlet, but also can block the motor so as to avoid the influence, caused by the motor, to the back air inlet mode, and therefore the vane wheel can be disassembled from the front side, and later-stage maintenance of the motor and volute cleaning can be conducted conveniently.
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Description

technical field

[0001] The invention relates to a range hood, in particular to a noise reduction range hood. 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" disclosed in the Chinese invention patent ...

Claims

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