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Centrifugal fan blade, centrifugal fan and air conditioner inner unit

A technology of centrifugal blades and centrifugal fans, which is applied in the direction of machines/engines, mechanical equipment, liquid fuel engines, etc. It can solve the problems of further improvement of noise reduction effect, high noise, and large wind resistance of centrifugal blades, and achieve stable and comfortable sound quality , reduce noise, uniform airflow effect

Active Publication Date: 2016-07-06
GREE ELECTRIC APPLIANCES INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the blades of most centrifugal fan blades are straight blades (that is, the blades are parallel to the rotation axis of the fan, such as figure 1 As shown), the centrifugal fan blade with this structure has large wind resistance and high noise
In order to solve this problem, some centrifugal fan blades use oblique blades (that is, the blades have an angle of 5 to 30 degrees with the fan rotation axis, such as figure 2 As shown), the centrifugal fan blade with this structure has a certain effect on noise reduction, but the noise reduction effect needs to be further improved

Method used

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  • Centrifugal fan blade, centrifugal fan and air conditioner inner unit
  • Centrifugal fan blade, centrifugal fan and air conditioner inner unit
  • Centrifugal fan blade, centrifugal fan and air conditioner inner unit

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] see image 3 , the centrifugal blade 1 in the present embodiment comprises a hub 11, two reinforcing rings 12, 13 and several blades 16, 17 extending in a straight line between the hub 11 and the reinforcing rings 12, 13, the blades 16, 17 It is inclined at an angle relative to the rotating shaft 2 of the centrifugal blade, and the blades 16 and 17 on both sides of the hub 11 are arranged in a V-shaped angle. Preferably, the V-shaped included angle is 120 to 180 degrees. Further preferably, the blades 16 and 17 on both sides of the hub 11 are distributed in mirror images.

[0034] The centrifugal fan blade 1 of the present embodiment and figure 1 The linear centrifugal fan blade 1 shown in the comparison test, the results are as follows Figure 9 As shown, it can be seen from the figure that the centrifugal fan blade of this embodiment can significantly reduce noise compared with the currently commonly used straight centrifugal blade.

Embodiment 2

[0036] see Figure 4 and Figure 5 The difference between this embodiment and Embodiment 1 is that the blades 16 and 17 on both sides of the hub 11 of the centrifugal blade 1 in this embodiment are distributed in a staggered manner. The thickness of the blade root 16a of the blade is 1-4mm, and the thickness of the end portion 16b is 1-3mm; further preferably, the thickness of the blade root 16a is 2.5mm, and the thickness of the end portion 16b is 1.5mm; the number of blades 16, 17 is 20-3mm. 150 tablets, preferably 41 tablets.

Embodiment 3

[0038] see Figure 6 The difference between this embodiment and Embodiment 1 is that the centrifugal blade 1 of this embodiment has four reinforcement rings 12, 13, 14, 15, the blades 16, 17 on both sides of the reinforcement ring 13 and the blades on both sides of the reinforcement ring 14 Blades 18, 19 are also arranged in a V-shaped angle.

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Abstract

The invention discloses a centrifugal impeller, which is provided with a rotating shaft and comprises a hub, at least two reinforcing rings and a plurality of blades stretching between the hub and the reinforcing rings or between the two reinforcing rings, wherein the blades are inclined at one angle relative to the rotating shaft; and the blades, on two sides of the hub or the reinforcing rings, are arranged in a V-shaped included angle. According to the invention, the centrifugal impeller, which adopts the structure that the blades are arranged in the V-shaped included angle, provides more even airflow during air supply in a rotary manner and reduces the noise greatly, and tone quality is more stable and comfortable through staggering coincidence of wave peaks of the noise. Tests showed that, compared with a straight centrifugal impeller, the centrifugal impeller provided by the invention reduces the noise level of the wind by about 3dB, and the tone quality is more stable and comfortable. Meanwhile, the invention discloses a centrifugal fan adopting the centrifugal impeller and an inner machine of an air conditioner adopting the centrifugal fan.

Description

technical field [0001] The invention relates to a fan blade, in particular to a centrifugal fan blade, a centrifugal fan using the centrifugal fan blade, and an air conditioner inner unit using the centrifugal fan blade. Background technique [0002] Centrifugal fan blades are widely used in air conditioners, so the noise generated by centrifugal fan blades has always been an urgent problem for manufacturers. At present, the blades of most centrifugal fan blades are straight blades (that is, the blades are parallel to the rotation axis of the fan, such as figure 1 As shown), the centrifugal fan blade with this structure has large wind resistance and high noise. In order to solve this problem, some centrifugal fan blades use oblique blades (that is, the blades have an angle of 5 to 30 degrees with the fan rotation axis, such as figure 2 As shown), the centrifugal fan blade with this structure has a certain effect on noise reduction, but the noise reduction effect needs to ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04D29/28F04D29/30
CPCF04D29/283F04D17/04F04D29/665
Inventor 张宝生王成刘玉杰苏起钦
Owner GREE ELECTRIC APPLIANCES INC