Tadano TT-800XXL1, Service Manual

Page: 158 / 267

K-2 K-2
Air Conditioner
5
W701-0160E
3. Basic refrigeration cycle
3.1 Construction
An ordinary air conditioner circulates a volatile
liquid (called a refrigerant) that is contained in
piping. In this piping, the refrigerant is repeatedly
vaporized and condensed.
This device is made up of the following
components.
1. Evaporator
In this component, the refrigerant vaporizes and
absorbs heat from around the pipes, thus cooling
the room.
2. Compressor
This component absorbs the gaseous refrigerant
that was vaporized in the evaporator, and
compresses it to higher pressure so that it can be
more easily liquefied in the condenser.
3. Condenser
In this component, the high-temperature
high-pressure refrigerant gas that was
compressed by the compressor is cooled and
liquefied.
4. Expansion valve
This is a kind of throttle valve which functions as a
barrier to keep the inside of the evaporator at low
pressure. It sprays the high-pressure liquid
refrigerant from the condenser into the evaporator
through a tiny opening, forming a low-pressure
low-temperature mist that is can easily and rapidly
vaporize.