| 摘要 |
PURPOSE:To utilize the solar heat to the utmost by a method wherein heating is performed by directly flowing the heat transfer medium heated at a solar heat collector into an indoor heat exchanger when enough insolution is possible and performed by means of a heat pump by sucking up the heat from the heat transfer medium at the evaporator of an absorption type heat pump when enough insolution is not possible. CONSTITUTION:When insolation is enough strong, the heat transfer medium sent by a pump 2 is heated at a solar kheat collector 1 up to about 120 deg.C and past through the side represented with a dashed line of a three-way valve 29 in order to heat the air in a room with an indoor heat exchanger 18. The heat transfer medium spent for heat radiation is returned through the side represented with a dashed line of a three-way valve 28 back to the pump 2 again. Because the sides represented with a solid line of the three-way valves 28 and 29 are open and yet a solenoid valve 37 is open and a solenoid valve 38 is closed when the insolation turns to be not enough strong, the heat transfer medium is heated at the solar heat collector 1 and sent via the side represented with a solid line of the three-way valve 29 through the solenoid valve 37 in order to give the heat to refrigerant at an auxiliary evaporator 36 and then past through the side represented with a solid line of the three-way valve 28 and finally returned to the pump 2. In other words, an absorption type heat pump having solar heat as its heat source is established. Under the conditions of no insolution at all, the pump 2 comes to the standstill, resulting in operating simply an absorption type heat pump having air as its heat source.
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