Heat pump air-conditioning unit system suitable for high-humidity low-temperature environment of underground hydropower station cavern

The present invention discloses a low-temperature high-humidity environment for underground hydroelectric heat pump air conditioning unit system, comprising a water head, intake pipe, decontamination, intake pump, a first electric control valve, a first heat exchanger, a second motor adjust the cooling water system is composed of a valve, a compressor, a four-way valve, a second heat exchanger, the first check valve, a first expansion valve, the second check valve, the second expansion valve, a first heat exchanger, the third electric control valve, the third heat exchanger, a fourth electric control valve having a pump system, a second heat exchanger, chilled water pumps, cooling cooler constituted (heating) system, by a third heat exchanger, heating pumps, water heaters, electric heaters, desiccant wheel dehumidification system into mechanism, into the cooler, the air handling system of desiccant wheel mechanism. Ensures good operation station underground caverns annual period various functions cooling, heating, dehumidification, and save a lot of waste of energy caused by the dehumidified.