| 摘要 |
<p>A thermostat for use in a building having a furnace and an air conditioning system adapted to generate energizing signals for only one of the furnace and the air conditioner at a given time. An operator programs the thermostat with a series of desired temperatures over a repetitive heating or cooling cycle by a manual data entry device. The thermostat includes a clock that interrogates the program to generate the desired temperature for the present time which is compared to the measured temperature within the building to generate control signals for the furnace. A desired heating temperature is equal to the desired heating temperature programmed for the present time. A desired cooling temperature is equal to a first predetermined temperature if said desired heating temperature programmed for the present time is in a first range of temperatures. The desired cooling temperature is equal to a second predetermined temperature, higher than the first, if the desired heating temperature programmed for current time is in a second range of temperatures, lower than the first range. The thermostat can be placed in and of three different modes, the third one having control signals generated for either the furnace or the air conditioner based upon the measured temperature and the respective desired temperature signals.</p> |
