Proving system for fuel burner blower
First Claim
1. A fuel burner ignition system comprising:
- electrical igniter means for igniting fuel emanating from a burner;
a valve controlling the flow of fuel to the burner;
condition responsive means;
electrical start-up control circuit for opening said valve and energizing said igniter means in response to a call-for-heat signal from said condition responsive means;
a fan means for forcing air by the burner;
a sensor circuit for monitoring rotation of said fan and producing a speed signal indicative of the rotational speed thereof; and
inhibit circuit means that produces a fault signal that prevents energization of said igniter means and opening of said valve in response to a value of said speed signal indicating any rotational speed of said fan means outside of a given range of speeds.
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Accused Products
Abstract
The invention is a fuel burner system including an electrical control circuit for initiating fuel flow to a burner in response to a call-for-heat from a condition responsive sensor, and an electrical ignitor for igniting the fuel emanating from the burner. Combustion or purging air is directed to the burner by a fan, the integrity of which is monitored by a sensor circuit that produces a fault signal in response to rotation of the fan at any speed in a given range of speeds. An inhibit circuit inhibits the control circuit to prevent opening of a fuel supply valve in response to the presence of the fault signal. Fan rotation at speeds either above or below a predetermined normal range indicates a malfunction and results in the fault signal that prevents the initiation of fuel flow and a try for ignition.
60 Citations
22 Claims
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1. A fuel burner ignition system comprising:
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electrical igniter means for igniting fuel emanating from a burner; a valve controlling the flow of fuel to the burner; condition responsive means; electrical start-up control circuit for opening said valve and energizing said igniter means in response to a call-for-heat signal from said condition responsive means; a fan means for forcing air by the burner; a sensor circuit for monitoring rotation of said fan and producing a speed signal indicative of the rotational speed thereof; and inhibit circuit means that produces a fault signal that prevents energization of said igniter means and opening of said valve in response to a value of said speed signal indicating any rotational speed of said fan means outside of a given range of speeds. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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Specification