PURPOSE: A marine farming area seawater exclusive heat pump system is provided to improve lifetime of the system by preventing that a heat exchanger is damaged by refrigerant being transferred from an exit to entrance and to reduce manufacturing costs. CONSTITUTION: A marine farming area seawater exclusive heat pump system comprises a compressor, a heat exchange unit, an expansion valve, and a cyclic regulation valve etc. The heat exchange unit comprises entrances(111,121) and exits(113,123) of refrigerant and a first heat exchanger(110) and a second heat exchanger(120) respectively formed an inlet port and an outlet port. The expansion valve distends the transferred refrigerant which is installed between the first heat exchanger and the second heat exchanger. The cyclic regulation valve controls the transfer direction of refrigerant so that the compacted refrigerant is selectively transferred to the first heat exchanger or the second heat exchanger.본 발명은 양식장 해수 전용 히트펌프 시스템에 관한 것으로서, 더욱 상세하게는 해수를 이용하여 고온해수를 생성하거나 월동기에 저수온을 이용하여 용이하게 사육수를 생성할 수 있음은 물론, 장치의 사용 수명을 향상시킬 있는 양식장 해수 전용 히트펌프 시스템에 관한 것이다.
