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REFRIGERATION PARTS AND FUNCTIONS
MECHANICAL PARTS
COMPRESSOR MOTOR
The compressor motor (sealed in the compressor housing) drives the compressor with a shaft that is
shared by both parts. It is started by the temperature control switch and the starting relay. It is stopped
by the temperature control switch and if subject to overload by the thermal overload switch.
COMPRESSOR
The compressor (sealed in the compressor housing) draws cold, low pressure refrigerant from the
evaporator and pumps hot, high pressure refrigerant gas out to the condenser.
CONDENSER
The condenser, located in the base of the vender, at the front, takes heat out of the hot, high pressure gas
that comes from the compressor. The gas loses heat as it goes through the condenser coils, and changes
into a liquid because it is still under pressure.
CONDENSER FAN
The condenser fan (between the condenser and the compressor motor), first draws air from the outside
of the vender through the condenser. This air takes heat from the condenser first and then is blown over
the compressor housing from which it also takes heat before going back outside of the vender. The
condenser fan runs when the compressor motor runs.
FILTER/DRYER
The filter/dryer is in the liquid line between the condenser and the capillary tube. This dryer filters out
any foreign particulate matter and also contains a desiccant to absorb any moisture that may be present
in the system.
CAPILLARY TUBE
The capillary tube (between the condenser and the evaporator in the refrigerant line) has a very small
inside diameter, and serves to control the refrigerant flow from the condenser into the evaporator.
EVAPORATOR
The evaporator (in the vender cabinet) takes heat from the air in the vender cabinet and gives this heat
to the liquid refrigerant. The liquid refrigerant is evaporated (boiled off) as a gas, and the gas is drawn
out by the compressor.
EVAPORATOR FAN
The evaporator fan draws warm air from around the cans or bottles in the cooling compartment and
blows it across the evaporator. As the air goes across the evaporator, it gives up heat to the evaporator,
then goes back to the cans or bottles, and takes heat from them. This fan runs continuously when the
vender is plugged in.
CONDENSATE PAN
The condensate pan (located in the compressor compartment) collects the water which condenses on the
evaporator. The water is evaporated into the surrounding air by means of soakers. The soakers extend
down into the pan to absorb the water. Exposure to the surrounding air evaporates the water in the
soakers.
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