Non-volute backward centrifugal ventilator

Abstract

The invention discloses a non-volute backward centrifugal ventilator. The non-volute backward centrifugal ventilator comprises a motor, a vane wheel, an air inlet, a bracket and a panel, wherein one end of the bracket is fixedly connected with the panel; the other end of the bracket is fixedly connected with one end of the motor; the vane wheel comprises a rear disk, blades and a front disk, wherein the blades are arranged between the rear disk and the front disk of the vane wheel; and the rear disk, the blades and the front disk of the vane wheel are fixedly connected; the rear disk of the vane wheel is fixedly connected with the other end of the motor; the front disk of the vane wheel cooperates with a sleeving opening of the air inlet; the cooperating section of the front disk of the vane wheel and the air inlet is an arc-shaped section; the curve convex point of the arc-shaped section faces one side of the outer diameter; the facing direction of the curve convex point of the arc-shaped section is opposite to that of the curve convex point of a main body molded line of the front disk of the vane wheel, and the curve convex point of the arc-shaped section and the curve convex point of the main body molded line form a hump-shaped curve. Through the adoption of the non-volute backward centrifugal ventilator disclosed by the invention, inlet air current flow loss is reduced, thewind capacity of the ventilator is improved, and inlet vortex noise is reduced.

Description

technical field [0001] The invention relates to the technical field of ventilators, in particular to a backward centrifugal ventilator without a volute. Background technique [0002] At present, in the matching relationship between the air inlet of the centrifugal fan and the impeller, since the outlet ring of the air inlet enters the inside of the impeller, its outer diameter is close to the inner side of the front disk inlet, and the diameters of the two are different, which will form a sudden change in area. Leakage disturbance, which deteriorates the blade inlet flow. Contents of the invention [0003] The object of the present invention is to provide a backward centrifugal fan without volute, which reduces the flow loss of the inlet air flow and the noise of the inlet vortex. [0004] The invention discloses a backward centrifugal fan without volute, which comprises a motor, an impeller, an air inlet, a bracket and a panel, one end of the bracket is fixedly connected...

AI Technical Summary

Problems solved by technology

[0002] At present, in the matching relationship between the air inlet of the centrifugal fan and the impeller, since the outlet ring of the air inlet enters the inside of the impeller, its outer diameter is close to the inner side of the front disk inlet, and the diameters of the two are different, which will form a sudden change in area. Leakage interference, which deteriorates blade inlet flow

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