Refers to a shutter shaped like a door, used as a return air with a filter. It can open the middle shutter like a door to facilitate the replacement and cleaning of the return air filter. There are many types of louvers, such as 45 degree blades, 30 degree blades, 0 degree blades and movable blades, etc. Its surface treatment methods include aluminum alloy oxidation and powder electrostatic spraying, etc., and the color can be used at will. Generally, this type of tuyere is used in the return air outlet of the air conditioner.

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  CMA metrological certification

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  National quality supervision, inspection and certification

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  China recognizes the joint symbol of international mutual recognition

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  China recognizes the joint symbol of international mutual recognition