Control system for a burner
AssigneeTelegan Limited
InventorKenneth Watson
Life of this patent
Estimating the term…
Abstract
This invention is a control for a burner enabling it to operate efficiently with very little excess air but providing a main control for the fuel and for the combustion air in response to demand, and an auxiliary control in response to the amount of free oxygen in the products of combustion. The latter quantity can be measured by a zirconia cell, and there are means for controlling its temperature accurately so that the reading is reliable. The controls in response to demand and excess air respectively are applied alternately in a cycle with a period of no control to enable the effect of an adjustment to be established before further control is applied.
Claims10
A burner control system for optimizing the fuel and air supplied to a burner, comprising:
- a fuel control;
- an air control responsive to the fuel control;
- demand responsive means for controlling the fuel control and air control;
- oxygen sensing means for sensing the amount of oxygen in the products of combustion from the burner and producing an oxygen signal;
- additional burner control means responsive to the oxygen signal for further adjusting air to the burner to optimize the ratio of fuel to air supplied for combustion;
- a substantially continuously running timer;
- and
- switch means connected with the timer for cyclical operation to first render the demand responsive means operative, then render both the demand responsive means and additional control means inoperative to provide time for stabilization of combustion following operation of the demand responsive means, and then render the additional control means operative for additional adjustment as necessary, and for thereafter repeating the cycle.
A burner control system for optimizing the fuel and air supplied to a burner, comprising:
- a fuel control;
- an air control responsive to the fuel control;
- demand responsive means for controlling the fuel control and air control;
- oxygen sensing means for sensing the amount of oxygen in the products of combustion from the burner and producing an oxygen signal;
- additional burner control means responsive to the oxygen signal for further adjusting air to the burner to optimize the ratio of fuel to air supplied for combustion;
- a substantially continuously running timer;
- and
- switch means connected with the timer for cyclical operation to first render the demand responsive means operative, then render one of the demand responsive means and additional control means inoperative to provide time for stabilization of combustion following operation of one of the control means, and then render the additional control means operative for additional adjustment as necessary, and for thereafter repeating the cycle.
Dependencies are inferred from the claim text.