MovinCool CM12 Service Manual - Manual (Page 19)

Operation Section
19
4.4 Capillary Tube
• The capillary tube is a long thin tube utilizing
line flow resistance to serve as an expansion
valve. The length and the inner diameter of the
capillary tube are determined by the capacity of
the refrigeration system, specified operating
conditions, and the amount of refrigerant. The
capillary tube causes the high pressure, high
temperature liquid refrigerant sent from the
condenser to expand rapidly as the refrigerant
is sprayed out through the fixed orifice in the capillary tube. As a result, the temperature and
state of the refrigerant becomes low and mist-like respectively, causing it to evaporate easily.
4.5 Evaporator
• The evaporator is a heat exchanger covered
with plate fins. Heat is removed from the air
being pulled across the evaporator by the
centrifugal fan and the resulting cool air is
expelled through the cool air vent.
4.6 Accumulator
• The accumulator is mounted on the suction
gas piping between the evaporator and the
compressor. The accumulator separates the
liquid refrigerant from the gas refrigerant,
allowing only the gas refrigerant to enter the
compressor. In the accumulator, suction gas is
led into a cylindrical vessel where the speed of
the gas is decreased. This process separates
the refrigerant contained in the gas by the force
of gravity, causing the refrigerant to accumulate at the bottom of the vessel. As a result, the
compressor is protected from possible damage caused by liquid refrigerant intake.
I001887
High Temp./High Pressure
Liquid Refrigerant
Low Temp./Low Pressure
Gas and Liquid Mixture
ILL00535-00
I000514
From Evaporator
To Compressor