Modulating gas furnace
AssigneeTrane International Inc.
InventorGordon Jeffrey Hugghins
Life of this patent
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Abstract
A method controls a modulating gas furnace by monitoring a differential pressure associated with the modulating gas furnace, learning an intermediate value associated with an intermediate capacity between a minimum output capacity of the gas furnace and a maximum output capacity of the gas furnace, learning one of a high value associated with the maximum output capacity and a low value associated with a minimum output capacity, establishing an estimated operating curve using either the intermediate value and the low value or using the intermediate value and the high value, and operating the gas furnace in accordance with the estimated operating curve.
Claims7
A method of controlling a modulating gas furnace:
- operating at least one general-purpose processor system, the at least one general-purpose processor system being configured to monitor a differential pressure associated with the modulating gas furnace;
- operating the general-purpose processor system to learn an intermediate value associated with an intermediate capacity between a minimum output capacity of the gas furnace and a maximum output capacity of the gas furnace;
- operating the general-purpose processor system to learn one of a high value associated with the maximum output capacity and a low value associated with a minimum output capacity;
- operating the general-purpose processor system to establish an estimated operating curve using either the intermediate value and the low value or using the intermediate value and the high value;
- and
- operating the general-purpose processor system to control the gas furnace in accordance with the estimated operating curve.
Dependencies are inferred from the claim text.