FLOW GUIDING RING STRUCTURE, AXIAL FLOW FAN AND AIR-CONDITIONER

WIPO Patent Application WO/2018/072664

A1

Disclosed are a flow guiding ring structure, an axial flow fan and an air-conditioner, relating to the de-noising field, and used for lowering the pneumatic noise of the axial flow fan during use on the premise that the air outflow amount of the fan is guaranteed. The flow guiding ring structure comprises a ring body (1), the ring body (1) comprises a closed cavity (11) and a through hole (12), the minimum diameter position of the ring body (1) is provided with open holes (13), and the cavity (11) communicates with the through hole via the open holes (13); and a fluid in the through hole (12) can enter the cavity (11) through the open holes (13). According to the above technical solution, on the premise that the Venturi tube effect of the flow guiding ring structure is guaranteed, an opening structure is added on a surface, turbulent energy of a blade top airflow is transmitted out of a fan area in a radial direction, so that the aim of de-noising is achieved.

JPS55101799	AXIAL BLOWER
JP2020510783	Method and configuration to minimize noise and structural excitation due to cavity acoustic mode
JPH10281097	VENTILATOR FOR VEHICLE

ZHU FANGYONG (CN)
XIONG JUN (CN)
GAO XU (CN)
LIAO JUNJIE (CN)

PCT/CN2017/106279

April 26, 2018

October 16, 2017

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GREE ELECTRIC APPLIANCES INC ZHUHAI (CN)

F04D29/66; F04D29/54

CN106321520A	2017-01-11
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CN202547038U	2012-11-21
CN106016651A	2016-10-12
CN201259294Y	2009-06-17
US20020071765A1	2002-06-13
TW201402956A	2014-01-16
CN201610917189A	2016-10-20

See also references of EP 3530961A4

ADVANCE CHINA IP LAW OFFICE (CN)

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