초록 ▼

A device for monitoring and modulating the admission of fresh air into a building. The device comprises a housing; a sensor associated with the housing and operable to measure airflow through the housing; and a damper including at least two damper blades. Each damper blade includes a shaft rotatably

A device for monitoring and modulating the admission of fresh air into a building. The device comprises a housing; a sensor associated with the housing and operable to measure airflow through the housing; and a damper including at least two damper blades. Each damper blade includes a shaft rotatably attached to the housing at least at a first shaft end. The shaft is located on the surface of the damper blade so as to divide the surface into first and second substantially equal areas.

대표청구항 ▼

A device for monitoring and modulating the admission of fresh air into a building, the device comprising: a housing; a sensor, associated with the housing and operable to measure airflow through the housing; a damper including at least two damper blades; a linking mechanism causing said at least two

A device for monitoring and modulating the admission of fresh air into a building, the device comprising: a housing; a sensor, associated with the housing and operable to measure airflow through the housing; a damper including at least two damper blades; a linking mechanism causing said at least two damper blades to move in synchronized but mirror image fashion; and a drive mechanism which returns the damper to a closed position in the event of a power loss; wherein each damper blade includes a shaft rotatably attached to the housing at least at a first shaft end, the shaft being located on the surface of the damper blade so as to divide the surface into first and second substantially equal areas; wherein each damper blade is substantially planar with a first substantially straight edge and a second curved edge; wherein the first substantially straight edges of said at least two damper blades engage; and wherein the housing is circular and the second curved edges of the at least two damper blades sealingly engage the housing.