Heat pump refrigerant circuit: how it works step by step

The refrigerant circuit is the heart of the heat pump. It transfers heat from a lower temperature area to a higher temperature area.

1. Compression

The compressor increases the pressure and temperature of the refrigerant vapor.

2. Condensation

In the condenser, the refrigerant releases heat and turns into a liquid.

3. Expansion

The expansion valve reduces the pressure of the refrigerant and prepares it for entry into the evaporator.

4. Evaporation

In the evaporator, the refrigerant absorbs heat and turns back into vapor.

Continuous cycle

The process repeats as long as there is a demand for heating or cooling.