Sub-Zero 700-3 BASE Technical & Service Manual page 45

Integrated
Capillary Tube (& Heat
Exchanger) (Figure 4-4)
The warm liquid refrigerant
travels through the long skinny
capillary tube which is soldered
to the suction line. (These two
tubes soldered together create
the heat exchanger.) As the
warm liquid refrigerant travels
through the capillary tube it
gives up heat to the cool refrig-
erant gas traveling through the
suction line and the pressure
drops, so it is a low-
pressure/cool liquid before it
enters the evaporator.
Evaporator (Figure 4-5)
As the low-pressure/cool liquid
refrigerant enters the evapora-
tor, it vaporizes. This is caused
by a dramatic pressure change
which occurs when the refriger-
ant enters the larger diameter
evaporator tubing from the
smaller diameter capillary tub-
ing. This vapor travels through
the evaporator absorbing heat
from the compartment, gradual-
ly converting it to a cool gas.
This cool gas then enters the
suction line.
Suction Line (& Heat
Exchanger) (Figure 4-6)
The cool gas travels through
the suction line which is sol-
dered to the capillary tube. (As
mentioned earlier, these two
tubes soldered together create
the heat exchanger.) As this
cool refrigerant gas travels
through the suction line it
absorbs heat from the warm liq-
uid refrigerant traveling through
the capillary tube, making it a
luke warm gas. The lukewarm
refrigerant gas then returns to
the compressor where the
process begins again.
3 Series
(700- BASE)
(EVAPORATOR SUMP)
HEAT EXCHANGER
CAPILLARY TUBE
Figure 4-4. Capillary Tube (& Heat Exchanger)
(EVAPORATOR SUMP)
EVAPORATOR
(EVAPORATOR SUMP)
HEAT EXCHANGER
SUCTION LINE
Figure 4-6. Suction Line & Heat Exchanger
4-5
Sealed System Information
Figure 4-5. Evaporator
#3758424 - Revision B - December, 2005