| 摘要 |
A heating system comprises a solar collector (10), a temperature sensor (30) responsive to the temperature of the heat transfer liquid passed therethrough, a heat pump including an evaporator (22), heat exchanger means embodying a condenser (16) for heating the heat exchange liquid, and a compressor (20), a liquid storage tank (2) and a pump (8) for circulating the heat transfer liquid around the system. A valve (28), controlled by the sensor (30), controls the flow of heat transfer liquid through the solar collector and through the condenser. <IMAGE>
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