| 摘要 |
PURPOSE:To make optimum the air conditioning and hot water feeding system, to manufacture the same in a compact structure and to reduce the initial cost therefor to carry out the supply of a heat medium by two, first and second, pumps to a coolant- heat medium heat exchanger upon the space heating operation. CONSTITUTION:Upon the space heating mode operation, a coolant-heat medium heat exchanger 26 functions as a radiator to heat the heat medium in a heat medium circulation circuit, and a three-way valve 31 operates to form a heat medium circulation circuit on a route of a first pump 32a three-way valve 31 a coolant-heat medium exchanger 26 an indoor unit 3 a hot water feeding heat exchanger 35 a tank 11. Upon this occasion, a second pump 32b is also driven. By this procedure, the amount of the heat medium flowing through the coolant-heat medium heat exchanger 26 and the indoor unit 3 is remarkably increased as compared with the case of using one pump. Thus, the heat medium heated by the waste heat from an engine 12 in the tank 11, is reheated by the coolant-heat medium heat exchanger 26, and radiated by the indoor unit 3, thereby carrying out the space heating. Further, in a hot water feeding heat exchanger 35 it is possible to feed the hot water by heating tap water with the heat medium from the indoor unit 3.
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