| 摘要 |
PROBLEM TO BE SOLVED: To provide a geothermal heat pump device in which an air bleeding operation of a geothermal heat circulation circuit is simplified.SOLUTION: A geothermal heat pump device includes: a heat pump circuit 9 in which a compressor 4, a load side heat exchanger 5, a pressure-reducing means 6 and a heat source side heat exchanger 7 are connected; and a geothermal heat circulation circuit 11 in which the heat source side heat exchanger 7 and a geothermal heat exchange pipe 10 embedded underground are connected. Therein, the geothermal heat circulation circuit 11 is constituted by annularly connecting the heat source side heat exchanger 7, a heat exchange outward pipe 12, a flow path switching means 13, an underground outward pipe 14, a geothermal heat exchange pipe 10, an underground return pipe 15, a channel switching means 13, a heat exchange return pipe 16 and the heat source side heat exchanger 7, in order. Therein, a geothermal heat circulation pump 21 and an air bleeding means 22 are disposed on the heat exchange outward pipe 12 or the heat exchange return pipe 16, and the flow path switching means 13 can be switched between such a state A as to communicate the heat exchange outward pipe 12 and the underground outward pipe 14 with each other and communicate the underground return pipe 15 and the heat exchange return pipe 16 with each other, and such a state B as to communicate the heat exchange outward pipe 12 and the underground return pipe 15 with each other and communicate the underground outward pipe 14 and the heat exchange return pipe 16 with each other. |
