The present invention, Ground Source Heat Pumps (GSHPs; Ground Source Heat Pumps), but the use of geothermal outdoor If insufficient heat exchanger relates to a geothermal heat pump type air conditioning system for selectively movable by the auxiliary heat source supply means allows for reliable and stable indoor air, with water as the heat exchange can be evaporated for condensing the refrigerant or air-conditioning according to any and the heat exchanger 16 to the refrigerant passage 11 on the heat pump unit having 10, is connected to the underground heat exchanger (32) having hagoseo the outdoor heat exchanger (16) can heat the underground heat exchanger (32) and the outdoor heat exchanger (16) for circulation to the heat exchange water circulation circuit 30, the three-way valve side (41a, 41b and 42a, 42b) for holding a cooling tower and boiler connected to said heat exchange water circulation circuit 30 by the first and second branch flow path that passes through (41, 42) auxiliary heat source supply means 40 and having. The three-way service valve (41a, 41b and 42a, 42b) is characterized in that a comprises a controller 50 to control.
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