THERMOSTAT AND METHOD FOR ADAPTIVELY PROVIDING A CHANGEOVER BETWEEN HEAT AND COOL
First Claim
1. A thermostat for providing an automatic changeover from a current mode to a new mode, the current mode and the new mode being alternate ones of a heating mode, in which the thermostat controls a heating system, and a cooling mode, in which the thermostat controls a cooling system, the thermostat comprising:
- a sensor for measuring a sensed room temperature;
a processor coupled to the sensor for controlling the thermostat;
a memory coupled to the processor for storing variables and software for programming the processor; and
a heating, ventilation, and air conditioning (HVAC) interface coupled to the processor for controlling the heating and cooling systems, wherein the processor is programmed to;
operate the thermostat continuously in one of the heating mode and the cooling mode;
complete a demand for one of heating and cooling in accordance with the current mode; and
after completing the demand, and until another demand occurs for one of heating and cooling;
repeatedly make measurements of a sensed room temperature;
determine, from the measurements, whether the sensed room temperature has finished a post-demand overshoot;
record an evaluation temperature, in response to determining that the sensed room temperature has finished the post-demand overshoot; and
decide whether to make the automatic changeover by periodically comparing the sensed room temperature with the evaluation temperature.
0 Assignments
0 Petitions
Accused Products
Abstract
A thermostat (800) operates continuously in a current mode (304) that is one of a heating mode and a cooling mode, and completes (520, 610) a demand for one of heating and cooling in accordance with the current mode. After completing the demand and until another demand occurs for one of heating and cooling, the thermostat repeatedly makes (302) measurements of a sensed room temperature, and determines (310, 414), from the measurements, whether the sensed room temperature has finished a post-demand overshoot. In response to determining that the sensed room temperature has finished the post-demand overshoot, the thermostat records (316, 418) an evaluation temperature, and decides whether to make an automatic changeover from the current mode to a new mode by periodically comparing (318, 420) the sensed room temperature with the evaluation temperature.
185 Citations
20 Claims
-
1. A thermostat for providing an automatic changeover from a current mode to a new mode, the current mode and the new mode being alternate ones of a heating mode, in which the thermostat controls a heating system, and a cooling mode, in which the thermostat controls a cooling system, the thermostat comprising:
-
a sensor for measuring a sensed room temperature;
a processor coupled to the sensor for controlling the thermostat;
a memory coupled to the processor for storing variables and software for programming the processor; and
a heating, ventilation, and air conditioning (HVAC) interface coupled to the processor for controlling the heating and cooling systems, wherein the processor is programmed to;
operate the thermostat continuously in one of the heating mode and the cooling mode;
complete a demand for one of heating and cooling in accordance with the current mode; and
after completing the demand, and until another demand occurs for one of heating and cooling;
repeatedly make measurements of a sensed room temperature;
determine, from the measurements, whether the sensed room temperature has finished a post-demand overshoot;
record an evaluation temperature, in response to determining that the sensed room temperature has finished the post-demand overshoot; and
decide whether to make the automatic changeover by periodically comparing the sensed room temperature with the evaluation temperature. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
-
11. A method in a thermostat for providing an automatic changeover from a current mode to a new mode, the current mode and the new mode being alternate ones of a heating mode, in which the thermostat controls a heating system, and a cooling mode, in which the thermostat controls a cooling system, the method comprising:
-
operating continuously in one of the heating mode and the cooling mode;
completing a demand for one of heating and cooling in accordance with the current mode; and
after completing the demand, and until another demand occurs for one of heating and cooling;
repeatedly making measurements of a sensed room temperature;
determining, from the measurements, whether the sensed room temperature has finished a post-demand overshoot;
recording an evaluation temperature, in response to determining that the sensed room temperature has finished the post-demand overshoot; and
deciding whether to make the automatic changeover by periodically comparing the sensed room temperature with the evaluation temperature. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
-
Specification