Chapter Ⅳ Maintenance（3. Maintenance of Key Parts）
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3. Maintenance of Key Parts
3.1 Introduction of Key Parts
It uses electricity as the driving power to compress refrigerant
into high temperature and high pressure gas and makes it
overcome resistance in the cooling system to flow circularly
and constantly.
It is used to separate gas refrigerant and liquid refrigerant. It
can prevent the compressor from taking in liquid refrigerant
and therefore prevent liquid impact. The gas-liquid separator is
located at the suction port of the compressor.
Tube in tube heat
exchanger
The high pressure and high temperature gas discharged from
the compressor releases heat inside the tube in tube heat
exchanger and heat up the water.
Electronic expansion
valve
Firstly, it throttles and reduces pressure of the high pressure
liquid refrigerant to ensure the pressure difference between the
condenser and the evaporator.
Secondly, it adjusts the refrigerant flow in the evaporator to
adapt to the heat load change of evaporator so that the cooling
device can operate stably.
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