The process of formation of water from air is called Vapour-Condensation. There are many parts of condensation cycle. Some are listed with brief description above.

1. Parts of Vapour
Condensation Cycle
Compressor
A Compressor is a mechanical device that increases
the pressure of a gas. In compressor, low pressure low
temperature gaseous refrigerant is converted into high
pressure high temperature gaseous refrigerant. Compressor
is the only component that consumes power in the whole
Vapour Condensation cycle apart from fans. It is an
Isentropic process.
Condenser
A Condenser is a device that is used to condense a fluid from
its gaseous state to liquid. In condenser, high pressure high
temperature refrigerant from the compressor is converted into
high pressure moderate temperature liquid refrigerant. It is an
Isobaric process.

2. Expansion Valve
Expansion valves are flow-restricting devices
that cause a pressure drop of the working
fluid. In expansion valve, high pressure
moderate temperature liquid refrigerant from
the condenser is converted into low pressure
low temperature refrigerant. It is an
Isenthalpic process.

3. Evaporator
An evaporator is used to allow a compressed cooling
chemical, such as R-134A or R-410A, to evaporate from
liquid to gas while absorbing heat in the process. In
evaporator, low pressure low temperature liquid refrigerant
from the expansion valve is converted into low pressure low
temperature gaseous refrigerant. Here the water vapour from
the air condenses. It is an Isobaric process.