Modern hydraulic door closers (referred to as door closers) began with a patent registered by Americans in the early twentieth century. Unlike traditional door closers, they are buffered by throttling the liquid in the door closer. . The core of the hydraulic door closer design idea is to realize the control of the closing process, so that the various functional indicators of the closing process can be adjusted according to the needs of the person. The significance of the door closer is not only the automatic closing of the door, but also the protection of the door frame and the door body (smooth closing). More importantly, the door closer has become an indispensable part of the intelligent management of modern buildings.
Door closers are mainly used in commercial and public buildings, but they are also used at home. They have many uses, the most important of which is to close the door itself to limit the spread of fire and ventilation in the building.
What is track lighting used for?
Led track lighting is a lamp installed on the track. There is no fixed space for the use of track lights. Whether it is commercial lighting or home lighting, it can be used. For example, the commercial lighting, whether the store can attract passersby into the store depends largely on the lighting effect. And LED Track Lights system can be very good lighting effect, can attract customers for your store. Because the Track Light system contains many types of lights, such as ambient lighting, accent lighting, and task lighting.
LED Track line lights and Slim Track Linear Lights belong to ambient lighting, with a relatively large illumination range to ensure the basic lighting of the environment. It is suitable for commercial places such as supermarkets and clothing stores to give the space a basic brightness so that the eyes can distinguish objects more comfortably.
COB LED Track Light belongs to accent lighting and task lighting. The position and irradiation direction of the Led Spotlight can be adjusted flexibly. Because of the focusing effect, it can better highlight the texture and details of the product and attract people's attention. Such as jewelry, counters, brand signs, window areas and merchandise display areas can use the Cob Spotlight.
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