Compact centrifugal fan

A centrifugal fan, compact technology, applied in electromechanical devices, mechanical equipment, control mechanical energy, etc., can solve the problems of insufficient diffusion, difficult design of volute parameters, and large wind resistance of the air path, and achieve a state of improving gas flow. , Improve the effect of effective circulation capacity and smooth air flow

Pending Publication Date: 2022-04-15
FANS TECH ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the design process of the centrifugal fan, because the design of the double air outlet has two outlets, the parameters of the two worm gear outlets will affect each other, and the expansion in each section of the volute is not sufficient, and the optimization design of the volute parameters is difficult.
In addition, in order to make the size of the fan as compact as possible, the internal wind resistance of the entire centrifugal fan is relatively large, and the static pressure of the fan is relatively high. At this time, the return flow at the volute tongue of the fan will increase significantly, and the air flow in the blade duct is separated greatly, which is prone to surge Phenomenon, periodic repeated flow fluctuations, severe vibration of the fan and obvious unsmooth air flow, have a negative impact on the noise reduction effect and working performance of the centrifugal fan
[0005] Therefore, the existing technology has the problems of prone to surge, repeated flow fluctuations and severe vibration of the fan

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] refer to Figure 1-4 , a compact centrifugal fan, including a volute 10, a driving device 20 and an impeller 30, the driving device 20 is respectively connected with the volute 10 and the impeller 30, and the impeller 30 is rotatably installed in the volute 10.

[0035] The volute 10 includes a front end cover 11, a rear end cover 13, a side plate 12 and a volute tongue 16, the two ends of the side plate 12 are respectively fixedly connected with the front end cover 11 and the rear end cover 13, the air inlet 14 is arranged on the front end cover 11, and the impeller 30 is located between the front end cover 11 and the rear end cover 13 . The anti-vortex ring 40 is fixedly connected with the front end cover 11 . The front end cover 11 is fixedly connected with a deflector 17 located between the anti-vortex ring 40 and the air inlet 14 , and the deflector 17 is bent toward the impeller 30 . The volute tongue 16 is fixedly connected with the side plate 12 and the side w...

Embodiment 2

[0068] refer to Figure 6 , a compact centrifugal fan, which is different from the embodiment in that: the anti-vortex ring 40 is in the shape of an annular ring surrounding the impeller 30 as a whole.

[0069] This embodiment has the following advantages:

[0070] The anti-vortex ring 40 is arranged as a ring around the outside of the impeller 30 as a whole, so that the anti-vortex ring 40 can better interfere with the formation of the axial secondary flow, and can effectively weaken the intensity of the axial secondary flow, thereby The state of gas flow inside the volute 10 can be improved, and the effective flow capacity inside the volute 10 is improved.

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Abstract

The invention discloses a compact centrifugal fan which comprises a volute, a driving device and an impeller, the driving device is connected with the volute and the impeller, the impeller is rotatably installed in the volute, the volute is provided with an air inlet and an air outlet, the volute is fixedly connected with an anti-vortex ring, the anti-vortex ring is located in the volute, and the driving device is connected with the driving device. The whole anti-vortex ring is in a bent arc shape, the anti-vortex ring is located in the radial direction of the impeller, and an interval space is formed between the anti-vortex ring and the impeller. The volute has the beneficial effects that the influence of axial secondary flow on vortex is effectively weakened, the sound quality of the fan is ensured while the performance of the fan is considered, air in the volute flows more smoothly, the phenomena of surge, repeated flow fluctuation and violent shaking of the fan are effectively prevented, and the service life of the fan is prolonged. The device has the advantage that the phenomena of surge, repeated flow fluctuation and violent fan shaking can be prevented.

Description

technical field [0001] The invention relates to the technical field of centrifugal fans, in particular to a compact centrifugal fan. Background technique [0002] Centrifugal fans are suitable for air-conditioning, refrigeration and ventilation industries and household purifier industries. The applicable fields of centrifugal fans include but are not limited to the above-mentioned industries. At present, the common centrifugal fan is a forward single-inlet centrifugal fan with a volute, which mainly includes a volute, a motor assembly and an impeller. Features. [0003] With the development and needs of the industry, the centrifugal fan needs to be increased from the traditional one outlet to two outlets. At this time, because the volute adopts the design of double outlets, and because the two sections of the volute of the double outlet volute affect each other, Due to the insufficient expansion of the airflow in the volute, etc., there are often phenomena such as high noi...

Claims

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Application Information

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IPC IPC(8): F04D29/42F04D29/44F04D29/66F04D17/16F04D25/08H02K7/14
Inventor 袁小永莫远忠
Owner FANS TECH ELECTRIC CO LTD
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