System and methods for modulating gas input to a gas burner

Details System and methods for modulating gas input to a gas burner System and methods for modulating gas input to a gas burner

2005-07-19

2005-07-19

Bennett, Henry (Department: 3743)

Combustion

Process of combustion or burner operation

Controlling or proportioning feed

Reexamination Certificate

active

06918756

ABSTRACT:
An improved gas appliance having a burner, a gas valve through which the flow of combustion gas to the burner is controlled, and a motor driven blower that supplies combustion air to the burner. The improvement includes means for increasing gas flow through the gas valve as blower speed increases, and decreasing gas flow through the gas valve as blower speed decreases, based on a pressure signal generated independently of combustion air pressure. This improvement allows a constant ratio of gas to air to be maintained in the burner while a combustion flow rate varies dependent on the blower motor revolutions per minute. Thus input pressures of combustion can be controlled at low cost.

REFERENCES:
patent: 5860411 (1999-01-01), Thompson et al.
patent: 5878741 (1999-03-01), Dempsey et al.
patent: 2002/0051321 (2002-02-01), La Fontaine

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