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Blades of axial fan and axial fan for air conditioner

An axial flow fan and blade technology, applied in the field of blades and axial flow fans for air conditioners, can solve the problems of high noise, insufficient air volume and air pressure of the axial flow fan, unreasonable blade design, etc., and achieve the effect of high work efficiency

Active Publication Date: 2015-11-25
QINGDAO HAIER MOLDS
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  • Description
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Problems solved by technology

[0005] The invention provides a blade of an axial flow fan and an axial flow fan for an air conditioner, which can solve the problems in the prior art that the air volume and pressure of the axial flow fan are insufficient and the noise is high due to unreasonable blade design

Method used

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  • Blades of axial fan and axial fan for air conditioner
  • Blades of axial fan and axial fan for air conditioner
  • Blades of axial fan and axial fan for air conditioner

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Embodiment Construction

[0051] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0052] Such as Figure 1-5 As shown, the blade of the axial fan according to the present invention is a special-shaped body formed by superimposing a plurality of characteristic sections, and the profile curve of the characteristic section (such as image 3 shown) is a closed curve enclosed by the pressure surface curve and the suction surface curve. The characteristic section of the blade is defined by the parameters shown in Table 1, which lists 10 characteristic sections and their corresponding parameters.

[0053] Table 1: 10 characteristic sections of the blade and related parameters for determining the characteristic sections

[0054] (unmarked unit: mm)

[0055]

[0056] combine Figure 1-3 , the relevant parameters in Table 1 are defined as follows:

[0057] H%: the ratio of r to R;

[0058] r: Radius of the outer cyl...

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Abstract

The invention provides a blade of an axial flow fan. When the blade is intercepted by using a first cylindrical surface which is coaxial with a fan axis and determined in accordance with the condition that H%=0.80 and r=80mm, the blade has a section which meets the following parameter conditions, wherein the parameter conditions are that alpha 1=0 degree, alpha 2=17.7 degrees, beta=38.6 degrees, b=174.2, P1x=27.16, P1y=96.24, P1z=-9.65, P2x=-99.95, P2y=3.08, and P2z=-83.92. When a first cylindrical surface intercepts the blade and is respectively determined in accordance with H%=0.57 and r=80, H%=0.44 and r =80, H%=0.36 and r=80 and H%=0.31 and r=80, above parameter values change correspondingly, and the unit of values which are unlabelled is millimeter. The invention also provides the axial flow fan for an air conditioner. By the aid of the best parameter matching, the air volume of the fan is improved, the noise is reduced and the cost performance is improved.

Description

technical field [0001] The invention belongs to the technical field of air conditioning, and in particular relates to a blade of an axial flow fan for air conditioning and an axial flow fan for air conditioning. Background technique [0002] In the design process of axial flow fans used in ventilation and ventilation devices such as air conditioners, the design of the blade installation angle directly affects the aerodynamic performance of the blades, and therefore has an important impact on the air volume of the fan. The radial bending angle and forward-sweeping bending angle of the blade not only affect the air volume, but also have an important impact on the aerodynamic noise. At present, it is often difficult to achieve the best parameter matching in the fan design process, resulting in the problems of insufficient air volume and high noise in the old airfoil fan. With the development of computer technology and computational fluid dynamics (Computational Fluid Dynamics,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04D29/38F04D29/32
Inventor 于国栋许勤王维斌王崇江刘宇鹏陈林赵磊
Owner QINGDAO HAIER MOLDS
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