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US 4,941,435 AGranted
Method and apparatus for preventing low-water failure in boilers
OwnerThomas C. Personinventor
Life of this patent
Estimating the term…
Abstract
An improved system for preventing low-water or "dry-boiler" failures which includes automatically flushing the low-water cut-off control valve and monitoring the external temperature of the boiler jacket so as to shut off the burners of the boiler, when such external temperature exceeds a pre-determined maximum, is disclosed.
Claims2
An improved method for preventing low-water failure in boilers comprising:
- (a.) periodic blow down of feed water from the bottom of a low-water cut-off control valve during the water feed cycle for from one second to the entire period of the feed cycle;
- (b.) shutting off the blow down after an effective period of time;
- (c.) monitoring the temperature of the boiler jacket by an external temperature sensor;
- and
- (d.) automatically shutting off the burners of the boiler when the sensor senses any temperature above a predetermined danger point.
2 more elements
A microprocessor boiler protection device comprising
- (a) A low-water cut-off valve having its drain pipe pass through an electronically activated blow down valve integrally connected to a microprocessor which signals the blow down valve to open for a brief period whenever the water feed cycle of the boiler commences, and
- (b) an electronic temperature detection component affixed to the external jacket of the boiler reservoir which deactivates the burners of the boiler when the temperature detection component senses a temperature higher than a predetermined danger point.
Dependencies are inferred from the claim text.