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Cross-flow impeller, cross-flow fan and wall-mounted air conditioner

A cross-flow fan and impeller technology, applied in the direction of machines/engines, mechanical equipment, non-variable pumps, etc., can solve the problems of not meeting the noise requirements of wall-mounted indoor units, affecting the aerodynamic characteristics of the fan, and large dynamic noise, so as to avoid The formation of blade tip vortex, the reduction of separation and vortex shedding, and the effect of reducing aerodynamic noise

Active Publication Date: 2014-02-12
GREE ELECTRIC APPLIANCES INC
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  • Claims
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AI Technical Summary

Problems solved by technology

Because the cross-sections of the pressure surface and the suction surface of the existing through-flow blades are single arcs, the airflow is prone to deflow, especially the airflow close to the suction surface, which affects the aerodynamic characteristics of the fan and generates greater aerodynamic noise, which cannot meet the requirements. Noise requirements for wall-mounted indoor units

Method used

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  • Cross-flow impeller, cross-flow fan and wall-mounted air conditioner
  • Cross-flow impeller, cross-flow fan and wall-mounted air conditioner
  • Cross-flow impeller, cross-flow fan and wall-mounted air conditioner

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Embodiment Construction

[0023] The present invention will be described in detail below with reference to the drawings and in conjunction with the embodiments. It should be noted that the following embodiments and the features in the embodiments can be combined with each other if there is no conflict.

[0024] In one of the embodiments of the present invention, a tubular impeller is provided, such as figure 1 As shown, the tubular impeller 100 includes several blades 110 arranged at intervals in the circumferential direction. The number of blades 110 is preferably 20 to 80. The blades 110 have a pressure surface 111 and a suction surface 112. The pressure surface 111 has a shape The radius of curvature of the line and / or the center of the profile line of the suction surface 112 is smaller than the radius of curvature at both ends. Preferably, from the outer circumference to the inner circumference, the radius of curvature of the profile line of the pressure surface 111 and / or the profile line of the suct...

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Abstract

The invention discloses a cross-flow impeller, a cross-flow fan and a wall-mounted air conditioner. The cross-flow impeller comprises a plurality of blades arranged in the peripheral direction at intervals, each blade is provided with a pressure surface and a suction surface, a profile of each pressure surface is a concave curve, a profile of each suction surface is a concave profile, and curvature radiuses of the middles of the profile of each pressure surface and / or the profile of each suction surface are smaller than curvature radiuses of two ends. Since the pressure surface and / or the suction surface of each blade are designed into the curves different in curvature radius, traditional single-circular-arc curve design of existing blades is changed, airflow separation of a blade flow passage is reduced, aerodynamic noise caused by flow separation and secondary flow is effectively lowered, airflow is enabled to flow through a blade lattice more smoothly on the basis of guarantee of power capability, vortexes in the blade lattice are prevented from falling off, the aerodynamic noise is reduced, and comfort in use of the air conditioner is improved.

Description

Technical field [0001] The invention relates to parts of a non-variable volume pump, in particular to a cross-flow impeller, a cross-flow fan with the cross-flow impeller, and a wall-mounted air conditioner using the cross-flow fan. Background technique [0002] Cross-flow fans are widely used in indoor units of split wall-mounted air conditioners due to their small size, compact structure, and uniform lateral flow. The cross flow fan is mainly composed of a cross flow impeller, an air duct and a motor. The cross flow impeller includes several blades arranged at intervals in the circumferential direction. The air flow in the cross flow fan flows through the blades twice, and the air flow is complicated. The cross flow impeller The characteristics of the air conditioner directly determine the air volume, noise and other performance indicators of the air conditioner. Because the cross-sections of the pressure surface and the suction surface of the existing cross-flow blades are si...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04D29/26
Inventor 邹建煌刘攀马重夫曹雷刘中杰
Owner GREE ELECTRIC APPLIANCES INC
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