초록 ▼

A vent control arrangement for energy conservation having bimetallic damper elements mounted in a draft hood which forms an integral part of the heating apparatus. The bimetallic elements open and close the flow passage for vent gases from the combustion apparatus in response to temperature change.

A vent control arrangement for energy conservation having bimetallic damper elements mounted in a draft hood which forms an integral part of the heating apparatus. The bimetallic elements open and close the flow passage for vent gases from the combustion apparatus in response to temperature change. The vent control arrangement is designed for minimum resistance to the flow of vent gases when installed in the integral draft hood. A design without friction surfaces and without transfer of movements or signals between components is used. Opening time is minimized by closeness to the heat source and in one embodiment by alternate bimetal reeds of different initial tension, in other embodiments by alternate orientation, or by different flexivity of alternate bimetal reeds.

대표청구항 ▼

A vent control arrangement for use with a gas-fired heating apparatus, including the combination of a draft hood for receiving gases from the apparatus, a relief opening, and an outlet for directing a discharge flow of gases to a vent, a damper frame mounted within the draft hood, means forming a cl

A vent control arrangement for use with a gas-fired heating apparatus, including the combination of a draft hood for receiving gases from the apparatus, a relief opening, and an outlet for directing a discharge flow of gases to a vent, a damper frame mounted within the draft hood, means forming a closure passage in the damper frame at a position upstream of the draft hood outlet and with the passage having a cross-sectional area greater than the cross-sectional area of said outlet, and temperature-responsive means shaped to project across the closure passage and to change shape responsive to temperature change for opening and closing the passage, said temperature-responsive means including a plurality of bimetal strips disposed across the closure passage, with at least one of said strips being formed of a bimetal having a given flexivity and which is disposed in side-by-side relationship with one or more other of said strips which is formed of a bimetal having a flexivity which differs from said given flexivity whereby the rate of change of shape for a given temperature change differs for the strips of different flexivity to provide additional openings between the strips and thereby achieve a disproportionately large opening of the closure passage during an initial phase of temperature change.