Geothermal heat pump system comprising vertical type and horizontal type heat exchange pipe and control method thereof

摘要

The present invention, the first heat exchange pipe buried in the vertical direction in the ground; A second heat exchange pipe buried in the horizontal direction near the ground surface; A main supply pipe and a main return pipe respectively connected to the heat pump for supply and recovery of heat exchange fluid; A path switching unit selectively connecting the main supply pipe and the main return pipe to the first heat exchange pipe or the second heat exchange pipe; Whether to change the mode from a vertical operation mode in which the main supply pipe and the main return pipe are connected to the first heat exchange pipe to a horizontal operation mode in which the main supply pipe and the main return pipe are connected to the second heat exchange pipe It provides a geothermal heat pump system including a control device for determining. According to the present invention, when the inlet temperature of the heat pump is excessively lowered in the heating mode or the inlet temperature of the heat pump is excessively increased in the cooling mode, the system is switched from the vertical mode to the horizontal mode to keep the geothermal energy constant in the long term. Can be maintained, and through this, it is possible to operate the geothermal heat pump system more efficiently and stably.