I. Core Power: Twin-Screw Compressor

At the heart of the unit is a twin-screw compressor. It operates using a pair of intermeshing male and female rotors that rotate within the housing, continuously drawing in, compressing, and discharging refrigerant. With no suction or discharge valves — which are common wear parts in other compressor types — this rotary positive-displacement compressor offers smooth operation and excellent resistance to impact loads.

II. Refrigerant Cycle (Heating Mode — Winter Operation)

Evaporation (Heat Absorption):
Low-pressure refrigerant evaporates in the evaporator, absorbing heat from groundwater or the circulating fluid in the buried ground loops.

Compression (Temperature Rise):
The compressor raises the low-pressure gas to a high-temperature, high-pressure state (typically 80°C to 90°C), upgrading the thermal energy grade at the cost of electrical power input.

Condensation (Heat Release):
The high-temperature, high-pressure gas flows into the condenser, where it releases heat to the indoor water circuit, providing space heating.

Expansion (Pressure Reduction):
After being throttled through the expansion valve, the refrigerant returns to the evaporator to begin the next cycle.