US 11,988,373 B1
Light fixture with self-test ability of sealing
Weikai Jiang, Guangzhou (CN); Jinjian Cai, Guangzhou (CN); Wenfeng Chen, Guangzhou (CN); Qingbi He, Guangzhou (CN); and Yinru Peng, Guangzhou (CN)
Assigned to GUANGZHOU HAOYANG ELECTRONIC CO., LTD., Guangzhou (CN)
Filed by Guangzhou Haoyang Electronic Co., Ltd., Guangzhou (CN)
Filed on May 23, 2023, as Appl. No. 18/322,066.
Claims priority of application No. 202320673598.5 (CN), filed on Mar. 30, 2023.
Int. Cl. F21V 31/03 (2006.01); F21V 15/01 (2006.01); F21V 21/30 (2006.01); F21V 23/00 (2015.01); F21V 31/00 (2006.01)
CPC F21V 31/03 (2013.01) [F21V 15/01 (2013.01); F21V 21/30 (2013.01); F21V 23/009 (2013.01); F21V 31/005 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A light fixture with self-test ability of sealing, comprising a light head having a head housing; a light source for emitting light and generating heat, which is arranged in the head housing, the light emitted by the light source being projected through a light outlet of the head housing; a temperature sensor and an air pressure sensor for respectively detecting temperature and air pressure inside the head housing, which are arranged in the head housing; and a controller configured to determine sealing performance of the head housing based on detection results of the temperature sensor and the air pressure sensor, wherein the head housing is provided with a waterproof breathable valve allowing an internal space of the head housing in air communication with an external space of the light fixture; and a switch is further provided, which is configured to make the internal space of the head housing in air communication with the external space of the light fixture by unblocking the waterproof breathable valve when the light fixture is in normal operation, so as to keep air pressure balance between inside and outside of the head housing, and configured to make the internal space of the head housing not in air communication with the external space of the light fixture by blocking the waterproof breathable valve when the light fixture is in testing of sealing performance.