Centrifugal fan blade, fan and air conditioning system comprising fan

A technology of centrifugal blades and blowers, which is applied in the fields of fans and air-conditioning systems including them, and the field of centrifugal blades, which can solve the problems of low fan efficiency, high noise, and small air volume of centrifugal fans, etc., to reduce unit power, reduce noise, and improve The effect of working ability

Pending Publication Date: 2021-10-26
ZHUHAI GREE REFRIGERATION TECH CENT OF ENERGY SAVING & ENVIRONMENTAL PROTECTION
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AI Technical Summary

Problems solved by technology

[0007] The object of the present invention is to provide a centrifugal fan blade, a centrifugal volute, a fan and an air conditioning system including the same, so as to solve the technical problems of the centrifugal fan in the prior art that the air volume is small, the noise is large, and the efficiency of the fan is low

Method used

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  • Centrifugal fan blade, fan and air conditioning system comprising fan
  • Centrifugal fan blade, fan and air conditioning system comprising fan
  • Centrifugal fan blade, fan and air conditioning system comprising fan

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Embodiment approach

[0061] As an optional embodiment of the present invention, along the height direction of the blade 1 , the inlet angle of the blade 1 changes continuously from the suction port to the fixed disk 3 .

[0062] Further, the above-mentioned continuous change of the intake angle of the blade 1 means continuous increase.

[0063] In the present invention, the air intake angle of the blade 1 is continuously changed along the height direction of the blade, from the suction port of the blade to the fixed disk of the blade, so as to effectively disperse the intake fluid and reduce noise.

[0064] like Figure 4 , Figure 5 and Image 6 As shown, specifically, in this embodiment, the maximum value of the inlet angle φ2 of the blade 1 is: φ2=φ1+H×Y, wherein: φ1 is the minimum value of the blade inlet angle, H is the height of the blade, and Y is the first Two coefficients, 1 degree / mm≥Y≥0.04 degree / mm. The blade inlet angle is the angle between the tangent line of the blade shape line...

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Abstract

The invention provides a centrifugal fan blade, a fan and an air conditioning system, relates to the technical field of air conditioners, and solves the technical problems that a centrifugal fan is small in air volume, high in noise, low in fan efficiency and relatively concentrated in airflow. The centrifugal fan blade comprises blades and a fixed disc, wherein each blade is of a forward bent blade structure and is fixed onto the fixed disc; and the widths of all or part of the blades are gradually increased from an air suction port to the fixed disc in the height direction of the blades, and the air suction port of the fan blade is of a gradually-shrunk trumpet-shaped structure. The fan comprises the centrifugal fan blade and a volute, wherein the two side edges of the volute are inclined. The air conditioning system comprises the fan. According to the centrifugal fan blade, the fan and the air conditioning system provided by the invention, the air suction port of the fan blade is of the trumpet-shaped gradually-shrunk structure, so that under the condition of the same outer diameter and height of the fan blade, the air inlet area of the fan blade is increased, the air inlet resistance is reduced, and the air volume and the fan efficiency are improved; due to the change of the air inlet angles of the blades, air inlet fluid is effectively dispersed, and noise is reduced; and the widths of the blades are gradually increased, and the working capacities of the blades are gradually enhanced, so that the overall working efficiency of the fan is improved.

Description

technical field [0001] The invention relates to the technical field of air conditioning, in particular to a centrifugal blade, a blower fan and an air conditioning system comprising the same. Background technique [0002] like figure 1 As shown, the forward-curved fan system (the bending direction of the air outlet of the fan blade is the same as the rotation direction of the fan blade) including the centrifugal fan blade and the volute has the following problems; [0003] 1. Traditional centrifugal blades, such as figure 1 and figure 2 As shown, when the outer diameter of a single blade 1 is constant and the air volume of the unit needs to be increased, the working height of the blade 1 can be increased. (The multiplication of the width and height of each blade is the work area) decreases, resulting in a decrease in the working ability of the blades, which cannot achieve the purpose of increasing the air volume. The traditional centrifugal fan has low air volume and low...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04D29/28F04D29/30F04D29/42F04D29/66
CPCF04D29/283F04D29/30F04D29/422F04D29/4233F04D29/663F04D29/666
Inventor 杜辉刘华朱江程曾成陈博强
Owner ZHUHAI GREE REFRIGERATION TECH CENT OF ENERGY SAVING & ENVIRONMENTAL PROTECTION
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