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Impeller, fan and extractor hood

A technology of impellers and blades, applied in the field of power equipment, can solve the problems of high noise reduction cost and complicated processing technology of impellers

Pending Publication Date: 2020-12-18
HANGZHOU ROBAM APPLIANCES CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide an impeller to solve the technical problems of high cost of impeller noise reduction and complicated processing technology in the prior art

Method used

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  • Impeller, fan and extractor hood
  • Impeller, fan and extractor hood
  • Impeller, fan and extractor hood

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] The impeller provided in this embodiment, such as Figure 1 to Figure 5 As shown, a plurality of blades 1 are included, and the plurality of blades 1 are arranged at intervals along the circumference of the impeller; the curved line of each blade 1 is a Bezier curve; a flow channel is formed between two adjacent blades 1, along the In the radial direction of the impeller, the cross-sectional area of ​​the flow channel gradually decreases from the flow channel inlet to the flow channel outlet.

[0040] The curved line of the blade 1 is drawn using a Bezier curve, and the shape of the blade 1 is optimized through the Bezier curve. Combined with simulation analysis, compared with the arc blade 1' in the prior art, the inlet angle 11 of the blade 1 is reduced, and The curvature of the blade 1 increases, and in the case of the same outer diameter of the blade 1, the cross section of the flow path of the blade 1 increases, so that the loss of the flow path of the blade 1 is r...

Embodiment 2

[0084] The fan provided by this embodiment includes a volute 6, an air guide ring 8, a motor 7 and the impeller provided in Embodiment 1; the motor 7 and the impeller are arranged inside the volute 6, and the output shaft of the motor 7 is fixedly connected to the impeller, and the guide The wind ring 8 is fixedly connected with the end face of the volute 6 where the air inlet is located.

[0085] Specifically, the output shaft of the motor 7 can be fixedly connected with the flange structure 5 on the middle plate 3 to drive the impeller to rotate.

[0086]The curved line of the blade 1 is drawn using a Bezier curve, and the shape of the blade 1 is optimized through the Bezier curve. Combined with simulation analysis, compared with the arc blade 1' in the prior art, the inlet angle 11 of the blade 1 is reduced, and The curvature of the blade 1 increases, and in the case of the same outer diameter of the blade 1, the cross section of the flow path of the blade 1 increases, so t...

Embodiment 3

[0088] The range hood provided in this embodiment, such as Figure 6 As shown, the impeller provided by Embodiment 1 or the fan provided by Embodiment 2 are included. The curved line of the blade 1 is drawn using a Bezier curve, and the shape of the blade 1 is optimized through the Bezier curve. Combined with simulation analysis, compared with the arc blade 1' in the prior art, the inlet angle 11 of the blade 1 is reduced, and The curvature of the blade 1 increases, and in the case of the same outer diameter of the blade 1, the cross section of the flow path of the blade 1 increases, so that the loss of the flow path of the blade 1 is reduced. The blade 1 can reduce the vortex and flow separation at the inlet of the blade 1, so that the air inlet flow is smooth, and the separation phenomenon of the air flow at the outlet of the blade 1 is also reduced to a certain extent, and the efficiency of the fan is basically not lost. While ensuring the performance, improving the flow f...

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Abstract

The invention provides an impeller, a fan and an extractor hood, and relates to the technical field of power equipment. The impeller comprises a plurality of blades, and the blades are arranged at intervals in the circumferential direction of the impeller. The curve of each blade is a Bezier curve. Flow channels are formed between every two adjacent blades, and the sectional area of each flow channel is gradually decreased from a flow channel inlet to a flow channel outlet in the radial direction of the impeller. Vortex and flow separation at a blade inlet can be reduced by the blades, so thatinlet air flow is smooth, the phenomenon of flow separation at a blade outlet is reduced to a certain extent, the efficiency of the fan is basically not lost, and the total pressure and flow are improved to a certain extent at the same rotating speed. While the performance is ensured, the flow field condition of the flow channels of the blades is improved, and the noise can be reduced. Accordingto the impeller, the shapes of the blades are optimized through the Bezier curve to achieve noise reduction, the installation modes of the blades do not need to be changed, the structures of the blades do not need to be modified, and the noise reduction cost and the complexity of the machining process can be reduced.

Description

technical field [0001] The invention relates to the technical field of power equipment, in particular to an impeller, a fan and a range hood. Background technique [0002] Among the noise components of the range hood, aerodynamic aerodynamic noise has a greater impact on the noise of the range hood. Most range hoods use multi-blade centrifugal fans. The pressure pulsation, jet-wake structure, boundary layer separation and vortex shedding inside the multi-blade centrifugal fan have a great influence on the noise characteristics of the air duct system. Therefore, how to optimize the multi-blade centrifugal fan The advanced impeller structure reduces the noise of the multi-blade centrifugal fan and becomes the focus of noise reduction for range hoods. [0003] In the prior art, the blades of the impeller of the multi-blade centrifugal fan are strongly forward-curved blades, and the profile of the blades is arc-shaped. In order to reduce the noise of multi-blade centrifugal fa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04D29/28F04D29/30F04D29/66F04D25/06F24C15/20
CPCF04D25/06F04D29/283F04D29/30F04D29/663F04D29/666F04D29/667F24C15/20
Inventor 任富佳李智宝于巍巍温俊生周海昕余国成
Owner HANGZHOU ROBAM APPLIANCES CO LTD
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