A make-up air device and a range hood system

Abstract

The utility model discloses a kind of air supplement device and extractor hood system, including air supplement pipeline and the valve plate of being located in air supplement pipeline, the valve plate rotates in the air supplement pipeline and moves;Driving unit for driving the valve plate movement is equipped on the outer wall of the air supplement pipeline, the driving unit is connected with power cord by air pressure switch, and the air pressure switch is used to control the driving unit.By the air pressure difference generated between exhaust duct and indoor space cooperation air pressure switch, the operating state of driving unit is controlled, realize that air supplement device can automatically carry out air supplement operation to indoor space according to the change of air pressure difference, ensure the air pressure balance of indoor space, and ensure the exhaust performance of range hood, and, air supplement device can also avoid long time introduction outdoor air, cause the impact to the comfort of indoor environment.

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