| 摘要 |
<p>Space heating apparatus comprises a boiler (1) operatively connected to a programmed controller (2) arranged to switch the boiler on and off according to a predetermined programme in response to inputs from a room temperature set point device (3), a room temperature sensor (4), a boiler flow temperature sensor (5) and a boiler return temperature sensor (6). The controller (2) is arranged to switch the boiler off when measured room temperature approaches an upper desired value, to prevent overshoot and to switch the boiler on when room temperature falls towards a lower desired value. The controller (2) does this by calculating the rate of change of room temperature and comparing an estimated future room temperature with the set point. The estimation may be improved by a learning process. <IMAGE></p> |
