CN2526566Y

CN2526566Y - Low-noise fan

Info

Publication number: CN2526566Y
Application number: CN 02200391
Authority: CN
Inventors: 陈朝明; 李庆祥; 刘宏源
Original assignee: JIUDESONGYI CO Ltd
Current assignee: JIUDESONGYI CO Ltd
Priority date: 2002-01-07
Filing date: 2002-01-07
Publication date: 2002-12-18
Anticipated expiration: 2012-01-07

Abstract

The utility model relates to a low-noise fan. A fan inside a box body and the periphery of a motor are provided with noise reduction rings. The object of reducing the noise can be reached by virtue of the function of noise reduction ring.

Description

The low noise blower fan

Described technical field

The utility model is a kind of low noise blower fan, can reach the purpose of certain reduction noise improvement working environment by being provided with of noise abatement ring, and can reach the advantage that reduces cost.

Background technique

In the dust free room of electronics corporation, be that considerable blower fan filter screen group must be set on ceiling board, the air that will totally clean by the effect of blower fan is via the effect that blows down of blower fan, dust can be blown down to the floor, blower fan is when using, the noise that is produced is for quite perplexing people's problem, especially in the semiconductor dust free room of precision, noise problem is about about 60 decibels for physiology that is in staff in this environment and the decibel value that psychology can produce its noise of considerable influence, so will how effectively to reduce noise, be the task of top priority of being engaged in the semiconductor dealer at present.

Because general blower fan-the employed blower fan of filter screen unit is to be centrifugal fan, in this kind design, air-flow from blower fan outlet flow to the air filter screen outlet before, the area of contact between air-flow and the sound absorbing material is limited, its effect that can abate the noise is also quite limited.

The low noise blower fan that general traditional type is commonly used includes as shown in Figure 3:

One casing 60 simultaneously is provided with suction port 61 in this housing, is provided with relief opening 62 in these suction port 61 opposites, and blower fan 63 is installed on casing 60 inside, links to each other with suction port 61, air can be sucked from suction port 61;

Filter screen 70, be located at the relief opening of casing 60, pollutant but filtering is flowed through in the air-flow of casing 60, wind-guiding dividing plate 72 is provided with blower fan 63 belows, noise abatement dividing plate 71 is located between the wind-guiding dividing plate 72 and filter screen 70 of casing 60 inside, make and wind-guiding dividing plate 72 between form tortuous air channel, sound absorbing material 73 is arranged at the surface, tortuous air channel of 71 on wind-guiding dividing plate 72 and noise abatement dividing plate, with the flow through noise of fluid in the tortuous air channel of absorption, but, above-mentioned but have when being configured in actual use as after shortcoming, remain to be improved:

Cost is too high and quality is wayward: commonly use structure in order to reach the problem that reduces noise, several pieces sound absorbing materials 73 and noise abatement dividing plate 71 need be set in casing 60 inside, and the laying of sound absorbing material 73 can derive the shortcoming of the quality problem that cost is too high, sound absorbing material 73 comes off or be scattered.

The content of model utility

Main purpose of the present utility model is to provide a kind of low noise blower fan, is in box house blower fan and motor periphery the noise abatement ring to be set, and borrows the noise reduction effect of noise abatement ring can have effective reduction noise and simple structure, firm advantage; When people need be in the people who works in the dust free room for a long time, can reach certain reduction noise improving the working environment purpose by being provided with of noise abatement ring, and can reach the purpose that effectively reduces cost.

Below in conjunction with drawings and Examples the utility model is further described in detail:

Description of drawings

Fig. 1 is of the present utility model in conjunction with sectional view.

Fig. 2 is that action diagram is analysed and observe in combination of the present utility model.

Fig. 3 be commonly use structure in conjunction with sectional view.

Specific embodiment

See also shown in Figure 1ly, the utility model is to be a kind of low noise blower fan, in comprising:

One casing 10, this casing 10 are can be arranged on the ceiling board, are provided with a loam cake 11 in casing 10 central authorities tops;

Be positioned at loam cake 11 belows and extend to casing 10 inside and be provided with a blower fan 20, one motor 21 is set, be provided with wind guide card 22 in the upper position of blower fan 20 in blower fan 20 inside;

Of the present utility model being characterised in that: inner and be positioned at blower fan 20 and be provided with a noise abatement ring 30 that is provided with in the form of a ring with motor 21 outsides in casing 10;

Blower fan 20 in casing 10 inside is provided with a slice central diaphragm 40 with motor 21 bottoms, and the side that is positioned at central diaphragm 40 belows is respectively equipped with small baffle 50, and the filter screen 51 with filtration is set in small baffle 50 belows.

Borrow when using after the combination of said structure as shown in Figure 2, the noise that the time is produced in running when blower fan 20, this noise can be in noise abatement ring 30, loam cake 11, between the wind guide card 22 through repeatedly reflecting action, that is through after the reflecting action repeatedly, the noise problem that can make blower fan 20 be produced in running can be by certain reduction, its level of noise can be reduced between 50 decibels to 51 decibels approximately, so people in the medium-term and long-term work of dust free room, for the people who is in the level of noise between 50 decibels to 51 decibels for a long time, can reach the purpose of improving its working environment, noise abatement ring 30 by simple structure designs, and has to reach the advantage that effectively reduces cost.Therefore, via above explanation as can be known, under the structural arrangements of the utility model with excellence, have at least as after advantage:

Be equipped with the noise abatement ring 30 that can reduce noise in a casing 10 inner set blower fans 20 with motor 21 outer periphery, borrow the effect of noise abatement ring 30 can reach the purpose that reduces noise, the decibel value of its noise is about about 50 decibels to 51 decibels, especially people need be in worker in the dust free room for a long time, can reach the purpose of certain reduction noise by means of the setting of noise abatement ring 30, reach and to improve the working environment of people in dust free room, and have and to reach the advantage that effectively reduces cost.

Claims

1. low noise blower fan, include: a casing, be provided with loam cake in casing, box house in the loam cake below is provided with the blower fan of tool motor, upper position in blower fan is provided with the wind guide card, central diaphragm is established in blower fan in casing and motor bottom, and side is respectively equipped with small baffle in the central diaphragm below, and filter screen is established in the small baffle below; It is characterized in that: in box house and be positioned at blower fan and the motor outside is provided with a noise abatement ring.

2. low noise blower fan according to claim 1, it is characterized in that: this noise abatement ring is to be provided with in the form of a ring.