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 aerodynam

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0021] Example one:

[0022] The bionic impeller in this embodiment is an improvement based on the prototype impeller. The prototype impeller parameter table 1:

[0023] Structural parameters symbol size Inner diameter of impellerD1 216mm Outer diameter of impellerD2 252mm Impeller widthB 136mm Number of bladesZ60 Blade thicknessd 0.4mm Inlet installation angleβ1 72° Exit installation angleβ2 168° Blade curvature radiusR 13.6mm

[0024] See Figure 1-6 This embodiment includes two sets of annular end faces and blades, and blades are evenly bridged between the two sets of annular end faces. The blades in this embodiment are bionic blades, and the impeller blades are uniformly arranged in a single type of bionic blades, and the bionic blades are drawn toward the impeller range hood. The side is the leading edge of the wave structure, and the trailing edge of the sawtooth structure is towards the blowing side of the impeller range hood:

[0025] The leading edge of the wave...

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PUM

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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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