LOW PRESSURE
GAS
HIGH PRESSURE
GAS
LOW PRESSURE
LIQUID
HIGH PRESSURE
LIQUID
Condenser
Heat
Exchanger
Evaporator
Capillary
Tube
Filter-
Drie
Suction
Line
Motor Compressor
Accumulator
THE CAPILLARY TUBE SYSTEM
CFC & Refrigeration Basics
BASIC REFRIGERATION
Starting at the Capillary Tube, refrigerant flows into
the evaporator and changes from a liquid to a gas. As it
absorbs heat, after leaving the evaporator, it flows
through the accumulator. The accumulator is a part
that is designed like a reservoir to allow any refrigerant,
that has not changed from a liquid to a gas, space to do
so before returning to the compressor. After flowing
through the accumulator, refrigerant flows through the
s u c t i o n line as a low pressure gas into the compressor.
The compressor pumps the refrigerant from a low pres-
sure gas to a high pressure gas and forces it into the
condenser. In the condenser with a fan circulating air
over it the refrigerant condenses from high pressure
gas to high pressure liquid. After leaving the condenser
refrigerant flow through the drier which is designed to
remove any particles or moisture in the system.
Refrigerant then flows through the liquid line into the
capillary tube. The capillary tube is designed to allow
a certain amount of refrigerant to flow through it to
keep the evaporator evenly flooded. The capillary tube
is taped to the suction line to cool the liquid to allow
the best heat transfer. When the refrigerant enters the
evaporator as a liquid, warm air from inside the cabinet
is circulated through the evaporator coil and the heat
from the air is then absorbed in the refrigerant.
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