Fan and Duct Machine

A fan and air duct technology, which is applied in the field of fans and duct machines, can solve problems such as fan and volute noise, and achieve the effects of solving complex structures, reducing transmission, and improving the noise environment
CN110541842BActive Publication Date: 2021-11-02QINGDAO HAIER SMART TECH R & D CO LTD +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
QINGDAO HAIER SMART TECH R & D CO LTD
Publication Date
2021-11-02

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Abstract

The invention discloses a fan and an air duct machine, belonging to the technical field of fans. The fan includes a volute and an impeller arranged between two air inlets on both sides of the volute, and also includes one or more noise reducers, and one or more noise reducers are arranged in the air duct at the air inlet of the volute; Each noise reducer includes an annular casing that is closed and adapted to the radial cross-sectional shape of the volute, and a plurality of sound-absorbing cavities that are arranged in sequence along the circumferential direction of the inner peripheral wall of the annular casing and are separated from each other are arranged in the annular casing , each muffler cavity has a through hole communicating with the air inlet. The embodiment of the present invention solves the noise problem when the fan is in use. The structure of the noise reduction component is complex and the noise reduction effect is relatively poor. The fan can reduce the noise of the air in the air duct of the volute through the noise reduction chamber of the noise reducer. Each sound-absorbing cavity adopts a structural design similar to a "Helmholtz resonator (Helmholtz)", which can effectively reduce the transmission of noise at the volute air duct of the fan.
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Description

technical field

[0001] The invention relates to the technical field of fans, in particular to a fan and an air duct machine. Background technique

[0002] At present, the indoor unit of the duct machine adopts a centrifugal fan, which mainly produces aerodynamic noise such as rotating noise and eddy current noise during its operation. The rotating noise is caused by the asymmetric structure around the impeller blade and the circumferential unevenness formed by the blade rotation. The noise generated by the interaction of the flow field, the vortex noise is mainly due to the turbulent boundary layer generated when the air flow passes through the blade and the vortex and the vortex split off, which causes the vortex noise caused by the pressure pulsation on the blade. Regardless of the type of noise mentioned above, it will hinder people's communication and language exchanges in production, affect the organization and management of production, and seriously damage people's phy...

Claims

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