Patent ID: 8795040
Filing Date: 2014-08-05
Classification: B08B,F24C,F24F

Abstract:
1. An autonomous ventilation system comprising: a variable-speed exhaust fan operable to remove an air contaminant from an area; a controller coupled to the variable-speed exhaust fan and operable to adjust the speed of the exhaust fan; an exhaust hood coupled to the exhaust fan, the exhaust hood operable to direct the air contaminant to the exhaust fan; and an infrared radiation (“IR”) sensor coupled to the controller, the IR sensor configured to detect a change in IR index in a zone below the exhaust hood and to communicate information relating to detected changes in IR index to the controller, wherein the controller is further operable to adjust the speed of the fan in response to information relating to changes in IR index detected by the IR sensor, said IR sensor is part of a sensor assembly, which also includes: the IR sensor has a field of view defined by the aperture when the IR sensor is aligned with the aperture, and the FOV indicator provides a visual indication of the IR sensor field of view in said area when the FOV indicator is aligned with the aperture.