3.2 Refrigerating cycle
1) Refrigerating cycle
2) The principle of refrigerating cycle
3) The role of each cycle
(1) Compression : The gasified refrigerant evaporated is absorbed into compressor through the suction pipe,
and then compressed by a piston in cylinder and turned into a gas of high temperature and
high pressure which is able to be liquified in a room temperature.
(2) Liquification : The gas of high temperature and high pressure in compressor is cooled by air in condenser
and liquified by a condensing heat.
(3) Expansion
: With passing through the capillary tube, the high pressure refrigerant liquified in condenser
turns into a low pressure condition, which is easy to evaporate.
(4) Evaporation : The liquid refrigerant of low temperature and low pressure passed though the capillary tube
absorbs the room air heat in evaporator and evaporates into a gas.
MOTOR
COMPRESSOR
OIL
(LIQUID REFRIGERANT)
CAPILLARY TUBE
OUTSIDE COOLING
AIR FOR REFRIGERANT
PASS THROUGH
SUCTION LINE
COOL LOW PRESSURE VAPOR
COOLED
AIR
COMPLETE LIQUID
BOIL OFF POINT
LIQUID
PRESSURE
DROP
ROOM AIR HEAT LOAD
VAPOR INLET
HOT
DISCHARGED
AIR
LIQUID OUTLET
HIGH PRESSURE VAPOR
LIQUID REFRIGERANT
LOW PRESSURE VAPOR
ROOM AIR CONITIONER
EVAPORATOR COILS
CONDENSER COILS
CYCLE OF REFRIGERATION
Compressor
(Mid. Temp)
(Hi. Temp)
Emission
Absorbing
(Hi. Temp)
(Low Temp)
(Mid. Temp)
Compression
Liquification
Expansion
Evaporation
Low
Press
Gas
High
Press
Gas
High
Press
Liquid
Low
Press
Liquid
Low
Press
Gas
Condenser
Capillary
Evaporator
TCL Air Conditioner Service Manual
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