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US 4,787,554 AGranted
Firing rate control system for a fuel burner
AssigneeHoneywell Inc.
InventorsJames I. Bartels, Kenneth B. Kidder
Life of this patent
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Abstract
A boiler control system utilizing a microcomputer, a memory, and a firing rate control scheme provides a boiler with a more responsive control arrangement. This improved response is accomplished by the firing rate control converting the desired pressure setpoint to a computed temperature, and then establishing a computed pressure band for control of the boiler.
Claims6
A boiler control system having a firing rate control function, including:
- microcomputer means including memory means, and further including input-output means;
- said input-output means connected to said microcomputer means and said memory means to provide said microcomputer means and said memory means with a plurality of control parameters for a fuel burner and a boiler which are adapted to be controlled by said boiler control system;
- firing rate control means connected to said microcomputer means and said memory means with said firing rate control means establishing a pressure control band which is a function of a selected setpoint control pressure and a selected temperature band;
- said firing rate control means converting said setpoint control pressure into a temperature setpoint;
- said firing rate control means further converting said selected temperature band and said temperature setpoint into a pressure control band;
- means to measure a pressure in said boiler;
- comparator means responsive to said pressure control band and a said measured pressure from said boiler to which said system is adapted to be connected;
- and said comparator means having output means connected to said fuel burner for said boiler to control said fuel burner to in turn control said pressure in said boiler.
5 more elements
Dependencies are inferred from the claim text.