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Centrifugal Impeller and Centrifugal Blower

a centrifugal blower and impeller technology, applied in the field of centrifugal blowers, can solve the problem of low blower efficiency

Inactive Publication Date: 2015-04-02
JOHNSON ELECTRIC SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The patent describes a diffuser used in a motor. The diffuser has walls that create air passages, with some of the walls having guides to help direct the air flow. The diffuser also has smoothly curved passages that extend from one end to the other. These passages allow air to flow from the motor through the diffuser and out the other side. Overall, the design helps improve the efficiency of the motor.

Problems solved by technology

One of the disadvantages of the current design is that the efficiency of the blower is low.

Method used

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  • Centrifugal Impeller and Centrifugal Blower
  • Centrifugal Impeller and Centrifugal Blower
  • Centrifugal Impeller and Centrifugal Blower

Examples

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Embodiment Construction

[0031]Referring to FIGS. 1 and 2, a centrifugal blower 20 in accordance with a preferred embodiment of the present invention comprises an electric motor, a centrifugal impeller 23 mounted to a shaft of a rotor of the motor, a diffuser 31 mounted to the motor and arranged between the motor and the impeller 23, and a casing 21 mounted to the diffuser 31. The impeller 23 is received in a chamber 22 defined by the diffuser 31 and the casing 21. The casing 21 has an opening 19 facing an inlet of the impeller 23.

[0032]In the embodiment, the motor is a universal motor. A stator of the motor comprises a stator core 41, stator windings 44 wound about teeth of the stator core 41, an end cap 43 mounted to the stator core 41, and a brush assembly 45 mounted to the end cap 43. In this embodiment, the diffuser 31 functions as another end cap of the motor. The diffuser 31 and end cap 43 are mounted to the axial ends of the stator core 41. The diffuser 31 has two projected mounting portions 38 whic...

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Abstract

A centrifugal impeller includes a cover, a base opposite the cover and a plurality of blades. The cover has an inlet. The plurality of blades surround the inlet and are arranged between and connect the cover and the base. Inlet edges of one end of the blades adjacent the center of the impeller define a cavity in communicate with the inlet. The dimension of the cavity gradually decreases along the direction from the cover towards the base.

Description

CROSS REFERENCE TO RELATED APPLICATIONS[0001]This non-provisional patent application claims priority under 35 U.S.C. §119(a) from Patent Application No. 201310452740.4 filed in The People's Republic of China on Sep. 29, 2013.FIELD OF THE INVENTION[0002]This invention relates to a blower and in particular, to a centrifugal blower and a centrifugal impeller especially suitable for the centrifugal blower.BACKGROUND OF THE INVENTION[0003]A centrifugal blower includes a motor and a centrifugal impeller. The centrifugal impeller includes a cover, a base and a plurality of blades which are arranged between the cover and the base and connect the cover and the base. The cover has an inlet for entrance of air flow. Ends of the blades adjacent the center of the impeller define a cavity facing the inlet of the cover.[0004]The centrifugal impeller is driven by the motor. A low pressure zone is formed at the center of the impeller. Air outside the blower enters into the cavity via the inlet of th...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): F04D29/44F04D29/58F04D25/06F04D17/08
CPCF04D29/441F04D25/06F04D29/5806F04D17/08F04D29/281F04D17/164F04D29/30F05D2240/303
Inventor GUO, CHUAN JIANGFANG, CHUAN HUIXUE, FENGLIU, FENGPAN, JI CHENGPAN, GANGSONG, YONG QIANG
Owner JOHNSON ELECTRIC SA