REFRIGERANT SYSTEM
11
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 to the
capacity of refrigeration system, 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
become low and mist-like respectively,
causing it to evaporate easily.
5.
Evaporator
The evaporator, like the condenser, is a heat
exchanger covered with spine 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 ducts.
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 -
letting only the gas refrigerant enter the
compressor. The construction of the accumu-
lator is as shown. In the accumulator, suction
gas is led into a vessel having a cylindrical
body, and the gas speed is decreased inside
the vessel. This separates the refrigerant
contained in the gas by the force of gravity
causing it to accumulate at the bottom of the
vessel. This protects the compressor from
possible damage caused by the intake of
liquid refrigerant.
Capillary Tube
Accumulator
High Temp. / High Press.
Liquid Refrigerant
Low Temp. / Low Press.
Gas and Liquid Mixture
To Compressor
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