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Title:
UNPOWERED LOUVER HAVING ADJUSTABLE AIR VOLUME
Document Type and Number:
WIPO Patent Application WO/2019/140822
Kind Code:
A1
Abstract:
An unpowered louver having an adjustable air volume. The center of gravity of the louver is located above a rotating shaft thereof. After the louver is opened by means of a louver handle (3), due to the collective effect of gravitational torque and the resetting of torsion springs (20, 22), the louver is in an opened state to perform ventilation when there is no wind or the wind is light. Since the area of the louver below the rotating shaft is larger than that above the rotating shaft, and, additionally, the upper part of the screen (7) is arranged on the exterior and the lower part of the screen (7) is arranged on the interior, torque generated by an exterior wind pressure opposes gravitational torque, such that a greater exterior wind speed results in a lesser degree of opening of the louver, and vice versa. A lower frame of the louver has an airfoil-like lower edge, thereby increasing acting torque of the exterior wind pressure. A louver position-limiting mechanism adjusts a rotation range of the louver according to different requirements with respect to the air volume. The torsion springs (20, 22) and a sealing device reduce noise and vibration during opening or closing of the louver. The unpowered louver is simple and reliable and does not require a power device or a sensor.

Inventors:
ZHANG, Tengfei (Patent Agency Center of DLUT, No. 2 Linggong RoadDalian, Liaoning 4, 116024, CN)
LI, Facheng (Patent Agency Center of DLUT, No. 2 Linggong RoadDalian, Liaoning 4, 116024, CN)
ZHAO, Yue (Patent Agency Center of DLUT, No. 2 Linggong RoadDalian, Liaoning 4, 116024, CN)
WANG, Shugang (Patent Agency Center of DLUT, No. 2 Linggong RoadDalian, Liaoning 4, 116024, CN)
Application Number:
CN2018/088688
Publication Date:
July 25, 2019
Filing Date:
May 28, 2018
Export Citation:
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Assignee:
DALIAN UNIVERSITY OF TECHNOLOGY (Patent Agency Center of DLUT, No. 2 Linggong RoadDalian, Liaoning 4, 116024, CN)
International Classes:
E05F1/00; E05F1/12; E05F5/02; E06B1/36; E06B3/06; E06B3/40; E06B7/16; E06B7/22; E06B9/52
Foreign References:
CN103180536A2013-06-26
CN101158259A2008-04-09
CN201125655Y2008-10-01
GB2415461A2005-12-28
US1655194A1928-01-03
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