Single-sided air intake and two-direction multi-blade centrifugal fan impeller

A centrifugal fan and impeller technology, applied in the field of bathroom ventilation, can solve the problems of increasing the eddy current noise of the fan, affecting the air outlet of the fan, and low pressure coefficient, and achieve the effect of reducing pressure pulsation, large flow coefficient, and low pressure coefficient.

Inactive Publication Date: 2019-06-21
浙江名流科技有限公司
View PDF0 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The air volume of this kind of blade impeller is small, the pressure coefficient is low, the pressure under the same conditions can only be achieved by high speed or large impeller diameter, and increasing the diameter of the impeller will be limited by space, increasing the speed will increase the noise, and In the leaf path of the blade, due to the serious blockage of the flow channel, it is easy to form a vortex, which affects the air output of the fan, and due to the existence of the vortex, the vortex noise of the fan is increased

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Single-sided air intake and two-direction multi-blade centrifugal fan impeller
  • Single-sided air intake and two-direction multi-blade centrifugal fan impeller
  • Single-sided air intake and two-direction multi-blade centrifugal fan impeller

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0017] Below in conjunction with accompanying drawing, the present invention will be described in further detail: reference Figure 3-7 , the impeller of the single-sided intake two-way multi-blade centrifugal fan of the present invention includes a disc 6 and a lower blade 4, an upper blade 5, a first wheel cover 1, a second wheel cover 2 and a third wheel Cover 3, wherein the first wheel cover 1, the lower blade 4, the second wheel cover 2, the upper layer blade 5 and the third wheel cover 3 are distributed sequentially from top to bottom, and the blades in the lower blade 4 are arranged along the circumferential direction, Each blade in the upper blade 5 is arranged along the circumferential direction, and the upper blade 5 and the lower blade 4 are symmetrically distributed along the radial direction, and the inlet installation angle β of the upper blade 5 1 70º-90º, the outlet installation angle β of the lower blade 4 2 150°-180°; each blade in the upper blade 5 is a for...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a single-sided air intake and two-direction multi-blade centrifugal fan impeller. The single-sided air intake and two-direction multi-blade centrifugal fan impeller comprises awheel disc, a lower layer blade, an upper layer blade, a first wheel cover, a second wheel cover and a third wheel cover located on the wheel disc, wherein, the first wheel cover, the lower layer blade, the second wheel cover, the upper layer blade are the third wheel cover are distributed in sequence from top to bottom, blades in the lower layer blade are arranged in the circumferential direction, blades in the upper layer blade are arranged in the circumferential direction, and the upper layer blade and the lower layer blade are symmetrically distributed in the radial direction; and the inlet mounting angle beta1 of the upper layer blade is 70-90 degrees, the outlet mounting angle beta2 of the lower layer blade is 150-180 degrees, each blade in the upper layer blade is the front bend blade, each blade in the lower layer blade is the back bend blade, and the height ratio K of the upper layer blade to the lower layer blade is 0.6:1. The single-sided air intake and two-direction multi-blade centrifugal fan impeller has the characteristics that the structure is simple, the air volume of a multi-blade centrifugal fan can be effectively, and the pressure pulsation of the blade surfaceand the vortex noise of the blade channel are reduced.

Description

technical field [0001] The invention belongs to the technical field of bathroom ventilation, and relates to an impeller of a single-sided air-intake bidirectional multi-blade centrifugal fan. Background technique [0002] At present, the two-way centrifugal fan embedded in the bathroom ventilation device generally has the problem of low performance, which cannot be compared with the one-way fan. Today, the heating and ventilation industry is increasingly miniaturizing products, which has seriously hindered the application and development of positive and negative bidirectional centrifugal fans in ventilation devices, and it is necessary to improve their performance. At present, the performance of the one-way multi-blade centrifugal fan with the same volume of the wind wheel and the air duct is more than twice that of the two-way. [0003] In view of the characteristics of large flow coefficient, high pressure coefficient and compact structure, multi-blade centrifugal fans ha...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): F04D29/28F04D29/30F04D29/66
Inventor 徐迹熊仲营
Owner 浙江名流科技有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products