| 摘要 |
This utility model discloses a ventilation grill that consists of a face cover (1)—a ventilation grill, with inclined fins (1a), forming a grill, with deviation in the “parallel to flange” position, of a rectangular housing (2) with a flange (2a) and a preventer (6), of an air flow control mechanism (FIG. 2) that includes a louver control wheel (3) that is connected via gear transmission with the louver control mechanism (4) that synchronizes the movement of the louvers (5), and has a louver control (and thus an air flow control) mechanism differing from a lever, and has a preventer against misalignment in the installation process, a simple design in production, and better functional properties in ranges of ventilation grills for suction or suction-and-exhaust ventilation with an air flow control mechanism.
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