Air duct system component and fixed impeller thereof

Abstract

The invention relates to an air duct system component and a fixed impeller thereof. The air duct system component comprises a fan cover, an impeller and the fixed impeller. The fan cover comprises a rear end part and a front end part provided with a first circular truncated cone-shaped accommodating cavity; the impeller comprises a wheel disc, a wheel disc bottom and a plurality of first blades; all the first blades are uniformly arranged on the outer surface of the wheel disc; the fixed impeller comprises an outer cylindrical part, an inner cylindrical part and a central cylindrical part; the inner cylindrical part is fixed on the inner wall of the outer cylindrical part through a plurality of second blades; the central cylindrical part is fixed on the inner wall of the inner cylindrical part through at least two fourth ribs; and the impeller is fixed to the front end of a rotating shaft of a brushless motor and located in the first circular truncated cone-shaped accommodating cavity of the fan cover, the bottom of the wheel disc of the impeller is close to the bottom of the first circular truncated cone-shaped accommodating cavity of the fan cover, and air duct gaps are formed between the outer end faces of the first blades of the impeller and the inner surface of the first circular truncated cone-shaped accommodating cavity of the fan cover. The outer cylindrical part of the fixed impeller is fixed on the front end part of the fan cover. The air duct system component has the advantages of being reasonable in structure, small in size, light in weight and the like.

Description

【Technical field】 [0001] The present invention relates to a small or micro motor, in particular to a small or micro brushless motor, such as a brushless motor used in a vacuum cleaner, and in particular to an air duct system component used in a brushless motor. 【Background technique】 [0002] A kind of brushless motor of the prior art is for example used for the brushless motor on the vacuum cleaner, and what has is directly called the vacuum cleaner motor, has following deficiencies: [0003] 1. Due to the limitations of the structure of the air duct system of the vacuum cleaner motor in the prior art, the air intake mode of the vacuum cleaner in the prior art is to completely isolate the dust at the outer end of the air inlet of the motor, and the air inlet must be isolated with a very dense filter screen and filter element Dust will hinder the airflow and increase the suction force of the motor; [0004] 2. The vacuum cleaner motor in the prior art adopts a centrifugal i...

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is to avoid the shortcomings of the above-mentioned prior art and provide an air duct system component and its fixed impeller, which have the advantages of reasonable structure, small volume and light weight. On the brush motor, the brushless motor has the advantages of high speed, large suction, low noise and high efficiency.

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