FLOW GUIDE DEVICE, CENTRIFUGAL FAN USING FLOW GUIDE DEVICE, AND RANGE HOOD

WIPO Patent Application WO/2022/077586

A1

A flow guide device, a centrifugal fan using the flow guide device, and a range hood. The flow guide device comprises a flow guide surface (231); a first curve segment (AD), a second curve segment (EA), a third curve segment (DF), and a first straight line segment (FE) jointly define the flow guide surface; a starting point (A) of the first curve segment serves as an origin of coordinates, two mutually perpendicular straight lines which pass through the origin of coordinates and are located on the plane where the first curve segment is located are respectively marked as an X axis and a Y axis, and a straight line perpendicular to both the X axis and the Y axis is marked as a Z axis, so that coordinates of an ending point (D) of the first curve segment are (x3,y3) and the inequalities x3≠0 and y3≠0 are satisfied, and Z coordinates of a starting point (F) and an ending point (E) of the first straight line segment are not equal to 0. The flow guide surface of the flow guide device is a curved surface formed by three curves, so that air flow can be effectively guided to turn, and turning energy loss and aerodynamic noise can be reduced.

LEI GAI (CN)

PCT/CN2020/124783

April 21, 2022

October 29, 2020

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NINGBO FOTILE KITCHEN WARE CO (CN)

F04D17/16; F04D29/44; F04D29/66; F24C15/20

WO2016047070A1

2016-03-31

CN203362556U	2013-12-25
CN203614460U	2014-05-28
CN2924364Y	2007-07-18
CN107023867A	2017-08-08
CN106257057A	2016-12-28
CN207778531U	2018-08-28
JPH07293498A	1995-11-07

NINGBO CHANNEL PATENT ATTORNEYS OFFICE (CN)

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