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US 11,153,935 B2Granted
Latching thermostats for redundant heating
AssigneeGoodrich Corporation
InventorsCharles A. Lee, Sabeshan Sean Periyathamby
Life of this patent
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Abstract
Redundant heating systems include a plurality of heating circuits to heat a region. Heating circuits include a temperature sensor to sense a temperature of the region, a heating element, a temperature controller to provide power to the heating element based on the sensed temperature of the region, and a latching thermostat in series with the heating element. The latching thermostat consumes power supplied by the temperature controller to the heating element in response to a temperature of the latching thermostat reaching an open latch threshold temperature.
Claims7
A redundant heating system comprising:
- a plurality of heating circuits configured to heat a region, each heating circuit comprising:
- a temperature sensor configured to sense a temperature of the region;
- a heating element;
- a temperature controller configured to provide power to the heating element based on the sensed temperature of the region;
- and
- a latching thermostat in series with the heating element, the latching thermostat configured to consume the power supplied by the temperature controller to the heating element in response to a temperature of the latching thermostat reaching an open latch threshold temperature;
- wherein the latching thermostat comprises:
- a temperature responsive latch;
- and
- a thermistor in parallel with the temperature responsive latch;
- wherein the latching thermostat is configured to have a first state and a second state;
- wherein the temperature responsive latch is closed, causing a current from the temperature controller to bypass the thermistor in the first state;
- and
- wherein the temperature responsive latch is open, diverting the current from the temperature controller to the thermistor in the second state;
- and
- wherein each of the plurality of heating circuits is configured to maintain the temperature of the region within a different temperature range.
13 more elements
Dependencies are inferred from the claim text.