COOLING FAN HAVING VARIABLE BLADES

WIPO Patent Application WO/2018/074664

A1

According to an embodiment of the present invention, variable blades among blades formed on a hub in the radial direction variably rotate in accordance with the rotational speed or the number of revolution, and thus the cooling performances can be enhanced at a low number of revolution and a high number of revolution, respectively. To this end, a cooling fan, having variable blades, according to an embodiment of the present invention comprises: a cylindrical hub connected to a driving shaft of a driving motor; a plurality of blade connecting portions radially arranged on the outer peripheral side of the hub; a plurality of variable blades respectively disposed on the end part toward the radial direction of each blade connecting portion; and rotating shafts which are for mutually connecting the end part of each blade connecting portion and the end part of each variable blade corresponding to the blade connecting portion, of which one end is inserted into a rotation hole formed in the end part of the blade connecting portion or the end part of the variable blade corresponding to the blade connecting portion, and each of which is positioned at a rotating center so as to enable the rotational motion of respective variable blades.

WO/2018/090439

BASE AND BLADELESS FAN

YOON KUKYOUNG (KR)

PCT/KR2016/015094

April 26, 2018

December 22, 2016

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HANMI MICRONICS INC (KR)

F04D25/08; F04D29/00; F04D29/36

KR20080028050A	2008-03-31
KR101666774B1	2016-10-14
KR101586614B1	2016-01-19
JPH09126191A	1997-05-13
KR101342746B1	2013-12-19

SHIN, Sungki (KR)

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