| 摘要 |
A heating, ventilation and air conditioning (HVAC) device (104) which includ es both heating and cooling operating modes provides an easy-to-use interface (110) for selecting the operating parameters of the device (104). The interface (110) allows the input of a setpoint temperature at which the HVAC device (104) conditions th e ambient temperature of a space (102). A mode switch-over algorithm (200) uses the setpoint temperature, the sensed temperature from the conditioned space, and prestore d threshold values that depend on the device's operating capacities, to determine when t o change the device between heating and cooling modes. Also, within each of the respectiv e modes, a heating (300) or cooling (400) algorithm controls the engaging and disengagi ng of the heating and cooling elements of the device (104) to maintain the temperature of the conditioned space (102) within a desired comfort zone. |
