CN202883470U

CN202883470U - Fan structure of noise-reduction type extractor hood

Info

Publication number: CN202883470U
Application number: CN201220488058.1U
Authority: CN
Inventors: 谭朝辉
Original assignee: Zhejiang Supor Electrical Appliances Manufacturing Co Ltd
Current assignee: Zhejiang Supor Electrical Appliances Manufacturing Co Ltd
Priority date: 2012-09-24
Filing date: 2012-09-24
Publication date: 2013-04-17
Anticipated expiration: 2022-09-24

Abstract

The utility model provides a fan structure of a noise-reduction type extractor hood. The fan structure comprises a motor, an impeller, a volute, a pair of air guide rings and a motor bracket. The motor is coaxially mounted with the impeller through the motor bracket and is integrally and rotatably arranged in the volute. The air guide rings are in a horn shape. Inner rings of the air guide rings are respectively inserted into air inlets disposed on two sidewalls of the volute. The peripheries of the air guide rings are covered on the two sidewalls of the volute. The impeller comprises a pair of connecting plates and a plurality of cylindrical surface units connected between the two connecting plates. The cylindrical surface units are staggered with a rotary surface at a certain angle and are equidistantly distributed. Diffusion noise reduction plates with horn-shaped openings are arranged on the outer sides of the connecting plates of the impeller. The diffusion noise reduction plates are arranged between the inner rings of the air guide rings and the inner wall of the volute. The fan structure of the noise-reduction type extractor hood has the advantages of being reasonable in structure of the impeller, and effectively reducing noise generated from airflow. The diffusion noise reduction plates are arranged on the outer sides of the connecting plates of the impeller, and consequently the noise in the position where air pressure suddenly changes is reduced.

Description

The noise-reducing type fan structure of smoke exhaust ventilator

Technical field

The utility model relates to a kind of noise-reducing type fan structure of smoke exhaust ventilator.

Background technique

Nowadays range hood becomes one of requisite equipment in people kitchen, kitchen ventilator then adopts centrifugal fan large with its relative suction, noise ratio is lower and receive an acclaim, in any case but noise or existence, noise is generally from two aspects, the one, the impeller noise, the 2nd, the turbulence noise that air-flow moves and sends in spiral case, existing denoising structure is based on the design that how to reduce the source of sound that has produced more.

Summary of the invention

The utility model provides a kind of noise-reducing type fan structure of smoke exhaust ventilator for the deficiency that prior art exists.

Goal of the invention of the present utility model realizes by following scheme:

The noise-reducing type fan structure of smoke exhaust ventilator, comprise motor, impeller, spiral case, a pair of air-ducting ring and electric machine support, motor is arranged in the spiral case by the coaxial installation of electric machine support and impeller and integral body rotationally, described air-ducting ring flare, the inner ring of air-ducting ring stretches in the intake grill of spiral case two side, the air-ducting ring outer rim covers on the spiral case two side, described impeller comprises a pair of land and some Cylindrical elements that is connected between two lands, each Cylindrical element and the surface of revolution several angle and equidistantly uniform that staggers; The land outside of described impeller is provided with the diffusion noise reduction disc of flare opening, and the diffusion noise reduction disc is between air-ducting ring inner ring and spiral case inwall.

The relation of described diffusion noise reduction disc minimum diameter D1 and maximum dimension D 2 satisfies D2=(1.0～1.1) D1, and the inclination angle a at edge satisfies 0＜a≤90 °.

The Cylindrical element of described impeller has the noise reduction perforation.

Described noise reduction penetration hole diameter D satisfies 1.5mm＜D≤4mm.

Described noise reduction perforation number on Cylindrical element is 1～10, and the noise reduction perforation on the same Cylindrical element is positioned on the same axis.

The diameter D5 of described spiral case intake grill and diffusion noise reduction disc maximum dimension D 2 satisfy D5=(1.0-1.1) D2; The height D4 of spiral case and impeller height D3 satisfy D4=(1.0-1.1) D3.

The beneficial effects of the utility model are mainly manifested in: blade wheel structure is reasonable, effectively reduces the noise that air-flow produces, and impeller land arranged outside diffusion noise reduction disc reduces the noise of air pressure sudden change position; The Cylindrical element of impeller arranges the noise reduction perforation, offsets the vibrations of Cylindrical element, further improves noise reduction; The overall dimensions ratio is reasonable, and the required power of impeller-driven is little, and fume-exhausting efficient is high and noise is low.　

Description of drawings

Fig. 1 is plan view of the present utility model;

Fig. 2 is left view of the present utility model;

Fig. 3 is internal structure schematic diagram of the present utility model;

Fig. 4 is the plan view of the utility model impeller;

Fig. 5 is the stereogram of the utility model impeller.

Embodiment

Below in conjunction with the drawings and specific embodiments the utility model is done and to be described in further detail:

Referring to figs. 1 through Fig. 3, the noise-reducing type fan structure of smoke exhaust ventilator, comprise motor 1, impeller 2, spiral case 3, a pair of air-ducting ring 4 and electric machine support 5, motor 1 is arranged in the spiral case 3 rotationally by electric machine support 5 and impeller 2 coaxial installations and integral body, air-ducting ring 4 flares, the inner ring of air-ducting ring 4 stretches in the intake grill of spiral case 3 two sides, air-ducting ring 4 outer rims cover on spiral case 3 two sides, impeller 2 comprises a pair of land and some Cylindrical elements that is connected between two lands, each Cylindrical element and the surface of revolution several angle and equidistantly uniform that staggers; The land outside of impeller 2 is provided with the diffusion noise reduction disc 6 of flare opening, and diffusion noise reduction disc 6 is between air-ducting ring 4 inner rings and spiral case 3 inwalls.

With reference to Fig. 4 and Fig. 5, the diffusion noise reduction disc 6 minimum diameter D1 of the present embodiment and the relation of maximum dimension D 2 satisfy D2=(1.0～1.1) D1, and the inclination angle a at edge satisfies 0＜a≤90 °.Flow through the noise of generation between Cylindrical element in order to reduce air-flow, the Cylindrical element of impeller 2 has the noise reduction perforation.Noise reduction penetration hole diameter D satisfies 1.5mm＜D≤4mm.Be easy to process and assurance noise reduction, the noise reduction perforation number on Cylindrical element is 1～10, and the noise reduction perforation on the same Cylindrical element is positioned on the same axis.

It can also be seen that from Fig. 3, in the present embodiment, the diameter D5 of spiral case 3 intake grills and diffusion noise reduction disc 6 maximum dimension D 2 satisfy D5=(1.0-1.1) D2; The height D4 of spiral case 3 and impeller 2 height D3 satisfy D4=(1.0-1.1) D3.

Although the utility model illustrates and describes by the reference preferred embodiment, but those skilled in the art should understand, and can be not limited to the description of the present embodiment, in the scope of claims, can make the various variations on form and the details.

Claims

1. noise-reducing type fan structure of smoke exhaust ventilator, comprise motor, impeller, spiral case, a pair of air-ducting ring and electric machine support, motor is arranged in the spiral case by the coaxial installation of electric machine support and impeller and integral body rotationally, described air-ducting ring flare, the inner ring of air-ducting ring stretches in the intake grill of spiral case two side, the air-ducting ring outer rim covers on the spiral case two side, it is characterized in that: described impeller comprises a pair of land and some Cylindrical elements that is connected between two lands, each Cylindrical element and the surface of revolution several angle and equidistantly uniform that staggers; The land outside of described impeller is provided with the diffusion noise reduction disc of flare opening, and the diffusion noise reduction disc is between air-ducting ring inner ring and spiral case inwall.

2. noise-reducing type fan structure of smoke exhaust ventilator according to claim 1, it is characterized in that: the relation of described diffusion noise reduction disc minimum diameter D1 and maximum dimension D 2 satisfies D2=(1.0～1.1) D1, and the inclination angle a at edge satisfies 0＜a≤90 °.

3. noise-reducing type fan structure of smoke exhaust ventilator according to claim 1 is characterized in that: the Cylindrical element of described impeller has the noise reduction perforation.

4. noise-reducing type fan structure of smoke exhaust ventilator according to claim 3, it is characterized in that: described noise reduction penetration hole diameter D satisfies 1.5mm＜D≤4mm.

5. noise-reducing type fan structure of smoke exhaust ventilator according to claim 3 is characterized in that: described noise reduction perforation number on Cylindrical element is 1～10, and the noise reduction perforation on the same Cylindrical element is positioned on the same axis.

6. according to claim 1 to 5 each described noise-reducing type fan structure of smoke exhaust ventilators, it is characterized in that: the diameter D5 of described spiral case intake grill and diffusion noise reduction disc maximum dimension D 2 satisfy D5=(1.0-1.1) D2; The height D4 of spiral case and impeller height D3 satisfy D4=(1.0-1.1) D3.