Centrifugal fan impeller structure for ceiling mounted air conditioner
A centrifugal fan and ceiling machine technology, applied in the direction of machines/engines, mechanical equipment, liquid fuel engines, etc., can solve the problems of increasing fan rotation noise, radiation noise, and overall noise of air-conditioning ceiling machines, etc., to reduce the fundamental frequency Noise, overall noise reduction effect
Inactive Publication Date: 2012-10-17
GUANGDONG CHIGO AIR CONDITIONING
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Problems solved by technology
[0002] It is known in the industry that the centrifugal fan blades of the existing air-conditioning ceiling machines are generally evenly distributed, that is, the angles between adjacent blades are equal. When the wheel rotates, the blades on the wheel hit the surrounding gas medium, causing the pressure pulsation of the surrounding gas. For a certain particle in a given space, whenever the blade passes by, the pressure of the gas hitting this particle will fluctuate rapidly Once, the rotating blades pass one by one continuously, which will continuously generate pressure pulsations, resulting in great inhomogeneity of the airflow, thus radiating noise to the surroundings
This will cause the blades to slap the surrounding air periodically, and the airflow will periodically impact the volute, forming fundamental frequency noise, which will cause the overall noise of the air conditioner ceiling machine to be loud
Method used
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[0009] The present invention will be further described below in conjunction with specific examples.
[0010] See attached figure 1 And attached figure 2 As shown, the centrifugal fan impeller structure of the air-conditioning ceiling machine described in this embodiment includes an impeller body 1, wherein the impeller body 1 includes blades 2, a motor seat 3, a windshield ring 4, and an impeller rear plate 5. The motor seat 3 is correspondingly arranged at the middle part of the impeller rear disk 5, and at the same time, the impeller rear disk 5 and the windshield ring 4 are parallel to each other, and the blades 2 are correspondingly arranged between the impeller rear disk 5 and the windshield ring 4, And they are fixedly connected with them respectively, and the most important thing is that the blades 2 described in this embodiment are distributed non-uniformly along the circumferential direction of the impeller body 1, and at the same time, the radial angle a between ea...
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The invention provides a centrifugal fan impeller structure for a ceiling mounted air conditioner. The centrifugal fan impeller structure comprises an impeller body; blades are non-uniformly distributed on the impeller body along the circumferential direction of the impeller body; meanwhile, radial included angles a between all the blades and the impeller body are different, namely a1 is unequal to a2, a2 is unequal to a3, a3 is unequal to a4, and the like, and a1+a2+a3+a4, and ...=360 degrees; and circle center included angles b between adjacent blades are different, namely b1 is unequal to b2, b2 is unequal to b3, b3 is unequal to b4, and the like, and b1+b2+b3+b4, ...=360 degrees. By adopting the technical scheme, the centrifugal fan impeller structure has the advantages the blades which are non-uniformly distributed can flap air around the blades in a non-periodical way, so the fundamental-frequency noise of a fan can be effectively reduced, and the aims of reducing the noise of the whole ceiling mounted air conditioner can be fulfilled.
Description
technical field [0001] The invention relates to the technical field of an air-conditioning ceiling machine, in particular to a centrifugal fan impeller structure of an air-conditioning ceiling machine. Background technique [0002] It is known in the industry that the centrifugal fan blades of the existing air-conditioning ceiling machines are generally evenly distributed, that is, the angles between adjacent blades are equal. When the wheel rotates, the blades on the wheel hit the surrounding gas medium, causing the pressure pulsation of the surrounding gas. For a certain particle in a given space, whenever the blade passes by, the pressure of the gas hitting this particle will fluctuate rapidly Once, the rotating blades pass one by one continuously, which will continuously generate pressure pulsations, resulting in great inhomogeneity of the airflow, thereby radiating noise to the surroundings. This will cause the blades to slap the surrounding air periodically, and the a...
Claims
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Inventor万忠民郑祖义许文明王义德
OwnerGUANGDONG CHIGO AIR CONDITIONING