| 摘要 |
A heating system having a thermostat (8) which switches temperature-dependently between an "on" condition and an "off" condition and which is heated anticipatorily. The power of the heating system is controlled between a switched-off position, one or more intermediate positions and the maximum power by a control unit (15) depending on the duration of at least "on" or "off" phases during which these "on" or "off" conditions respectively occur. There are further described a heating boiler and a method utilizing the same type of control. Because the lengths of the time intervals during which the thermostat is in the "on" and/or "off" condition are measured, it is possible to obtain with a simple room thermostat - which is usually already present when a heating boiler is replaced - having only "on"-"off" signalling an indication of the difference between the set temperature and the actual temperature, on the basis of which the continuous power of the heat source can be controlled. |
