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Multi-blade centrifugal fan with reinforced air inlet function

A centrifugal fan and multi-blade technology, which is applied to mechanical equipment, non-variable-capacity pumps, machines/engines, etc., can solve the problems of increasing the circumferential speed of the impeller, and achieve the effects of increasing air volume, remarkable environmental protection effect and simple structure.

Inactive Publication Date: 2012-07-04
广东恒业电器有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In the known technology, it has not been found that the air volume, wind pressure and efficiency of the centrifugal fan can be improved by other means without increasing the peripheral speed of the impeller under the premise of keeping the diameter of the impeller of the centrifugal fan and the size of the volute fluid channel unchanged.

Method used

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  • Multi-blade centrifugal fan with reinforced air inlet function
  • Multi-blade centrifugal fan with reinforced air inlet function
  • Multi-blade centrifugal fan with reinforced air inlet function

Examples

Experimental program
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Effect test

Embodiment 1

[0026] Such as figure 1 , figure 2 As shown, the multi-blade centrifugal fan with enhanced air intake function is composed of a fan main body 1 and a centrifugal impeller 2. The blades 21 are fixed on the impeller and are evenly distributed along the circumference. More specifically, the blades, the blades The intake side 201 is formed by straight lines and curves, and is concave; the exhaust side 202 of the blade is formed by straight lines.

Embodiment 2

[0028] Such as image 3 As shown, the only difference between this embodiment and Embodiment 1 is that the inlet edge 201 of the blade is formed by a curve and is wavy.

Embodiment 3

[0030] Such as Figure 4 As shown, the only difference between this embodiment and Embodiment 1 is that the air inlet edge 201 of the blade is formed by a broken line and is in an "L" shape.

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Abstract

The invention relates to a multi-blade centrifugal fan with a reinforced air inlet function. Nontraditional special-shaped blade structures are adopted. On the premises that the diameter of an impeller is not increased and the size of a volute fluid passage is not changed, by changing the shape of the air inlet side of each blade and increasing the area of the air inlet of the impeller, the goal of improving the air quantity and the air pressure of the centrifugal fan is achieved; by differently optimizing the shape of the air inlet side and the exhaust side of each blade of the impeller, an air flow field at the inlet of the impeller is obviously improved, the air flow loss and the noise of the fan are obviously reduced, the outlet speed of the impeller is improved, and the air quantity, the air pressure and the efficiency of the fan are obviously improved; the special-shaped blades have various structures and different demands can be met; the multi-blade centrifugal fan with the reinforced air inlet function provides a new approach for improving the air quantity, the air pressure and the efficiency of the centrifugal fan and reducing the noise; and the structure of the multi-blade centrifugal fan is simple, the cost is low, the implementation is easy, the energy-saving and environmental-friendly effects are remarkable and the multi-blade centrifugal fan can be popularized and used in various fields.

Description

technical field [0001] The invention relates to a centrifugal fan, in particular to a multi-blade centrifugal fan with enhanced air intake function. Background technique [0002] Existing centrifugal fans, especially multi-blade centrifugal fans, have blades of equal width design. On the premise of keeping the diameter of the fan impeller and the size of the volute fluid channel unchanged, the only way to increase the air volume and pressure of the fan is to pass Increase the speed of the fan to increase the peripheral speed of the fan impeller. However, the fan rotation noise and swirl noise are proportional to the 10th power and 6th power of the impeller peripheral speed respectively. Increasing the fan speed will inevitably increase the fan noise, which is not conducive to noise control and environmental protection. [0003] In the range hood industry, in order to obtain a larger air volume and wind pressure for the range hood, the forward blade type multi-blade centrifu...

Claims

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Application Information

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IPC IPC(8): F04D29/28F04D29/30
Inventor 吴成年
Owner 广东恒业电器有限公司
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