UNDERGROUND HEAT EXCHANGER AND AIR CONDITIONING SYSTEM

摘要

PROBLEM TO BE SOLVED: To provide an underground heat exchanger which can reduce a workload on an operator at an installation site and can improve heat exchange efficiency between underground soil and a heat medium.

SOLUTION: A plurality of outer pipes (30) of the underground heat exchanger (10) are buried in the ground with intervals, and inner pipes (20) inserted in the respective outer pipes (30) are connected in parallel to each other. The plurality of underground heat exchangers (10) are classified into first and second groups. Opening/closing valves (9) corresponding to the respective groups are opened and closed to supply low-pressure refrigerants to the groups.

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