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Bionic impeller for exhaust hood

A technology for range hoods and range hoods is applied in the fields of removing range hoods, applications, and household stoves, etc., and can solve the problems of reducing the shedding frequency of vortex shedding of leading edge pressure impacting trailing edge, reducing the working efficiency of fans, increasing motor load, etc., so as to reduce tailing Fringe vortex shedding frequency, easy processing, and the effect of reducing motor load

Active Publication Date: 2014-10-15
HANGZHOU DE&E ELECTRICAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in practical applications, the blade structure of the above-mentioned products is not conducive to reducing the pressure shock at the leading edge and the frequency of vortex shedding at the trailing edge, and the aerodynamic noise of the impeller is relatively high; in addition, the blade area of ​​the above-mentioned products is large, and the mass of the impeller is large, which increases the motor load. , reducing the working efficiency of the fan

Method used

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  • Bionic impeller for exhaust hood
  • Bionic impeller for exhaust hood
  • Bionic impeller for exhaust hood

Examples

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Embodiment 1

[0022] The bionic impeller in this example is an improvement based on the prototype impeller, and the parameters of the prototype impeller are listed in Table 1:

[0023] Structural parameters symbol size Impeller inner diameter D 1 216mm Impeller outer diameter D 2 252mm Impeller width B 136mm number of blades Z 60 blade thickness d 0.4mm Import mounting angle β 1 72° outlet mounting angle β 2 168° blade curvature radius R 13.6mm

[0024] see Figure 1-6 , this embodiment includes two sets of annular end surfaces and blades, and blades are uniformly connected between the two sets of annular end surfaces. The blades in this embodiment are bionic blades, and the impeller blades are uniformly arranged with a single type of bionic blades. The side is the front edge of the wave structure, and the side facing the impeller range hood is the trailing edge of the sawtooth structure:

[0025] The leadin...

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Abstract

The invention relates to a bionic impeller for an exhaust hood. The bionic impeller is applied to the exhaust hood and comprises a plurality of groups of annular end surfaces and blades. The corresponding blades are uniformly in bridge connection between each two groups of annular end surfaces. The bionic impeller is characterized in that the blades are bionic blades, the front edges of the bionic blades face a suction side of the exhaust hood and are of wavy structures, and the tail edges of the bionic blades face a blowout side of the exhaust hood and are of sawtooth structures. The bionic impeller has the advantages that pressure impact on the front edges of the blades and vortex-shedding frequencies of the tail edges of the blades can be reduced advantageously, and accordingly pneumatic noise generated when the impeller works can be reduced; extended areas of the blades can be reduced by 13.5% as compared with blades in original shapes, accordingly, the weight of the impeller can be reduced, loads on a motor can be decreased, and the efficiency of a fan can be improved advantageously.

Description

technical field [0001] The invention relates to a bionic impeller for a range hood used in the range hood. Background technique [0002] The forward-facing multi-blade centrifugal fan is widely used in range hoods, and it has the characteristics of compact structure, high pressure coefficient, and low flow coefficient. Its structure includes motor, volute and impeller. Among them, the impeller is the core component of the multi-blade centrifugal fan. It has the characteristics of large number of blades, large blade curvature, large inner and outer diameter of the impeller, and short blade flow path. Its performance directly affects the performance of the range hood. When the range hood is working, the motor is directly connected to drive the impeller to rotate, and the oil fume sucked in the axial direction is thrown out of the impeller radially from the center of the impeller under the action of centrifugal force. However, due to the large impact of the air flow on the le...

Claims

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Application Information

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IPC IPC(8): F04D29/38F24C15/20
Inventor 高德康刘小民
Owner HANGZHOU DE&E ELECTRICAL CO LTD
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