Asymmetric centrifugal fan and ducted air conditioning unit air supplying device

Abstract

The invention discloses an asymmetric centrifugal fan, and belongs to the field of centrifugal fans. The asymmetric centrifugal fan comprises blades, a round partition plate, a first fan hub arranged on a first side of the round partition plate, and a second fan hub arranged on a second side of the round partition plate. The blades comprise a first blade set and a second blade set. The first blade set is arranged between the first fan hub and the round partition plate. The second blade set is arranged between the second fan hub and the round partition plate. A shaft sleeve is arranged in the middle of the round partition plate, the distance between the first fan hub and the round partition plate is less than the distance between the second fan hub and the round partition plate, and the ratio between the distance from the first fan hub to the round partition plate and the distance from the first fan hub to the second fan hub is 0.45. An asymmetric structure is adopted in the asymmetric centrifugal fan, and therefore the asymmetric centrifugal fan is smooth in air intake, strong in air supplying capacity, large in air inlet space, and sufficient in air flow.

Description

technical field [0001] The invention relates to the field of centrifugal fans, in particular to an asymmetrical centrifugal fan and an air supply device for a duct machine equipped with the asymmetrical centrifugal fan. Background technique [0002] Symmetrical centrifugal fans are often used for gas suction. They have the advantages of compact structure, high efficiency, and low noise. They have a wide range of applications and are suitable for blowers, air conditioners and other products. [0003] For example, the Chinese patent document authorized announcement number CN201306307Y discloses a centrifugal fan, which is a symmetrical centrifugal fan, which includes several blades, hubs, disks and inserts. The top of the blade is connected to the hub, and the bottom is connected to the disk. The insert is installed in the center of the disc, and the outer wall at one end of the insert is provided with two parallel annular grooves, the grooves are composed of a half-circle wid...

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the shortcomings of existing centrifugal fans such as limited air supply capacity, poor air intake, and a part of the air flow that is easily disturbed, the technical problem to be solved by the present invention is to propose a centrifugal fan with an asymmetric structure, which has smooth air intake and air supply. Strong capacity, large air intake space, sufficient gas flow

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