CN200958492Y

CN200958492Y - Centrifugal fan volute

Info

Publication number: CN200958492Y
Application number: CN 200620064203
Authority: CN
Inventors: 梁社兵; 潘建红; 邹建煌; 刘利娜
Original assignee: Gree Electric Appliances Inc of Zhuhai
Current assignee: Gree Electric Appliances Inc of Zhuhai
Priority date: 2006-09-14
Filing date: 2006-09-14
Publication date: 2007-10-10
Anticipated expiration: 2016-09-14

Abstract

The utility model discloses an centrifugal blower spiral case. The bottom of the centrifugal blower spiral case is slant so that the coaxial gap between the lower end face of the flow guide ring and the upper end face of the impeller is distributed along the impeller at unequal distance, thereby further improving the property of the internal flow field of the blower, particularly the countercurrent at the flow guide ring and the inlet of the impeller, improving the blower performance and reducing the pneumatic noise.

Description

Centrifugal blower volute

[technical field]

The utility model relates to a kind of improvement of air conditioner, especially relates to a kind of centrifugal blower volute of air conditioner.

[background technique]

The effect of centrifugal blower volute is the gas that leaves impeller is concentrated, water conservancy diversion, and change the part kinetic energy diffusion of gas into static pressure, the bottom surface of tradition centrifugal blower volute (near the base plate side) is plane structure, make the axial clearance of baffle liner lower end surface and impeller upper-end surface be equally spaced, produce backflow phenomenon at baffle liner and impeller inlet place easily, and the aerodynamic noise that is produced is bigger, and fan performance is relatively poor.

Therefore, the centrifugal blower volute that provide a kind of and improve blower fan flow field characteristic, improves backflow phenomenon, improves fan performance, reduces aerodynamic noise is real in necessary.

[model utility content]

The purpose of this utility model provides the centrifugal blower volute that a kind of fan performance is good, noise is low.

To achieve these goals, the utility model adopts following technological scheme:

A kind of centrifugal blower volute is provided, this centrifugal blower volute bottom surface (i.e. the one side of close base plate side) is the plane of inclination, make the axial clearance of baffle liner lower end surface and impeller upper-end surface circumferentially distribute not equidistant along impeller, and then improved the flow field characteristic of blower fan, especially improved the backflow phenomenon at baffle liner and impeller inlet place, improve the performance of blower fan, reduce aerodynamic noise.

This angle of inclination, volute of blower bottom surface preferred range is 0 °＜θ≤20 °(tilting laterally) or-20 °≤ θ＜0 °(tilting to the inside).

Compared with prior art, the utility model has following beneficial effect:

The fan performance of the utility model centrifugal blower volute is good, noise is low, has improved blower fan flow field characteristic, and has improved the backflow phenomenon of baffle liner and the generation of impeller inlet place.

[description of drawings]

Fig. 1 is the utility model centrifugal blower volute embodiment one a side partial sectional view;

Fig. 2 is the utility model centrifugal blower volute embodiment two a lateral plan.

[embodiment]

As depicted in figs. 1 and 2, the utility model centrifugal blower volute embodiment's side partial sectional view, this centrifugal blower volute bottom surface 1 (i.e. the one side of close base plate side) is the plane of inclination, the true dip direction of this plane of inclination can have two kinds, this volute of blower bottom surface 1 angle of inclination preferred range as shown in Figure 1 is 0 °＜θ≤20 °, volute of blower bottom surface 1 tilts laterally, and this volute of blower bottom surface 1 angle of inclination preferred range shown in Figure 2 is-20 °≤θ＜0 °, and volute of blower bottom surface 1 tilts to the inside.According to the result of numerical simulation and experimental verification, getting tiltangle is 2 °, makes foam spiral case palm, the former machine unanimity of air quantity fundamental sum when this scheme is applied to the cabinet-type air conditioner indoor set, and noise has reduced 1.7dB (A).There is significant improvement in flow field to cabinet-type air conditioner indoor set blower fan.

This centrifugal blower volute bottom surface 1 is set to the plane of inclination, make the axial clearance of baffle liner lower end surface and impeller upper-end surface circumferentially distribute not equidistant along impeller, and then improved the flow field characteristic of blower fan, especially improved the backflow phenomenon at baffle liner and impeller inlet place, improve the performance of blower fan, reduce aerodynamic noise.

The above only is preferred embodiment of the present utility model, and protection domain of the present utility model is not limited thereto, and those of skill in the art are any to be included within the utility model protection domain based on non-material change on the technical solutions of the utility model.

Claims

1, a kind of centrifugal blower volute is characterized in that, this centrifugal blower volute bottom surface is the plane of inclination.

2, centrifugal blower volute as claimed in claim 1 is characterized in that, this volute of blower bottom surface range of tilt angles is 0 °＜θ≤20 °, and the volute of blower bottom surface tilts laterally.

3, centrifugal blower volute as claimed in claim 1 is characterized in that, this volute of blower bottom surface range of tilt angles is-20 °≤θ＜0 °, and the volute of blower bottom surface tilts to the inside.

4, centrifugal blower volute as claimed in claim 1 is characterized in that, this angle of inclination, volute of blower bottom surface is θ=2 °.