Patent
Combustion control valve means and system
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TLDR
In this paper, an air damper or valve is located in an air inlet pipe to a blower and a gas supply pipe is also connected to the inlet manifold adjacent the blower, and a modulating-type pressure regulating valve controls the rate of gas flow and adjusts the modulating valve to maintain an outlet pressure that provides a fuel/air ratio substantially constant.Abstract:
Combination control apparatus including means for supplying air to a furnace, means for supplying gas to the furnace, means responsive to heat demand for varying the air flow and means responsive to the rate of air flow for adjusting the rate of gas flow to maintain a constant fuel/air ratio. Preferably, an air damper or valve is located in an air inlet pipe to a blower and a gas supply pipe is also connected to the inlet pipe adjacent the blower. The blower feeds the mixture into the furnace. A modulating-type pressure regulating valve controls the rate of gas flow and means responsive to air pressure, located between the air valve and the blower, adjusts the modulating valve to maintain an outlet pressure that provides a fuel/air ratio that is substantially constant.read more
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