Dual carbon monoxide detection system with gas cut off and alarm

Details Dual carbon monoxide detection system with gas cut off and alarm Dual carbon monoxide detection system with gas cut off and alarm

1997-08-29

1999-04-20

Wu, Daniel J.

Communications: electrical

Condition responsive indicating system

Specific condition

340693, 165 111, 431 16, 431 22, G08B 1710

Patent

active

058960899

ABSTRACT:
A dual carbon monoxide detection system is provided including a gas furnace having a heat exchanger with a supply air duct for delivering heated air and a return air duct for receiving air to be heated. The gas furnace further has a gas input line for receiving gas from a gas supply line for heating purposes. A first carbon monoxide detector is situated within the supply air duct for generating an activation signal upon the detection of more than a predetermined amount of carbon monoxide. Associated therewith is a second carbon monoxide detector situated within the return air duct for generating the activation signal upon the detection of more than a predetermined amount of carbon monoxide. A gas valve is coupled between the gas input line and the gas supply line. The gas valve is adapted to preclude the flow of gas through the gas input line only upon the receipt of power. Connected to the gas valve is a relay for delivering power thereto upon the receipt of the activation signal. Finally, a controller is adapted to continuously transmit the activation signal to the relay upon the receipt thereof from at least one of the carbon monoxide detectors.

REFERENCES:
patent: 5280802 (1994-01-01), Comuzie, Jr.
patent: 5379026 (1995-01-01), Whittle
patent: 5477913 (1995-12-01), Polk et al.
patent: 5576739 (1996-11-01), Murphy
patent: 5608384 (1997-03-01), Tikijian

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