Hudson 1955 Rambler, Техническое и сервисное руководство

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ALL SEASON AIR CONDITIONING SYSTEM 13
Discharge Line Muffler
"Rambler" Series
The discharge line muffler is used in the "Rambler"
Series to dampen high pressure pulsations. A fine
mesh wire screen is also incorporated to filter
any dirt that may be present. The muffler is
connected to the discharge service valve (Fig. 13).
Condenser
The high pressure, high temperature vapor produced
by the compressor is directed through a high
pressure line to the condenser. The condenser is
located ahead of the radiator, mounted on the
radiator air baffles.
The heat of compression and the latent heat of
vaporization absorbed by the refrigerant in the
cooling coil is rejected to the air flowing over
the finned condenser tubes, liquefying or condens-
ing the refrigerant.
The temperature of the air used to cool the
condenser is lower than the saturated temperature
for the compressor discharge pressure. Freon-12
gives up its latent heat of evaporation during this
process to the coolant air and in this way the heat
removed from the car is given up to the atmosphere.
The condenser temperature is dependent upon two
factors, the temperature and amount of the air flow
across the condenser core.
Receiver
The receiver, located on the right hand side of
the front crossmember, is a reservoir which stores
the liquid refrigerant which is still under high
pressure. Under normal operating conditions, the
receiver should be about one-half filled. As the
liquid condenses, it drops into the receiver ; the
pick-up tube delivers the liquid refrigerant to
the expansion valve. The pick-up tube or quill
should normally be below the liquid level; the
upper half of the receiver is normally in a high
pressure vapor state. To determine the level,
place your hand on the receiver; the part contain-
ing the liquid will be colder than the vapor half
while the system is in operation ( Fig. 16).
1. Fusible Plug
2. Pick-up Tube
FIGURE 16—Receiver
The receiver is equipped with a fusible plug,
set to discharge at extremely high temperatures
and pressures. In the event of a fire or
development of excess refrigerant pressure, the
fusible plug will melt releasing the entire
refrigerant charge harmlessly to the air
outside the car.
Filter
The liquid refrigerant flows under high pres-
sure through the filter. This unit has a fine
mesh wire screen that removes any dirt that may
be present in the system (Fig. 17).
FIGURE 17— Sight Glass and Filter Location
"Hornet" and "Wasp" Series
Sight Glass
The high pressure liquid flows from the filter
through the sight glass.
The sight glass and the filter are mounted on
the right hand wheelhouse panel (Fig. 17). Some
"Rambler" models do not incorporate a sight
glass as illustrated in Figure 13.
The sight glass provides a quick way of checking
the refrigerant charge in the system. Presence
of bubbles or foam would indicate a shortage of
refrigerant.
Heat Exchanger
"Rambler" Series
The heat exchanger is used on the "Rambler"
Series ( Fig. 13). The function of the heat
exchanger is to transfer heat. This transfer of
heat gives two results; one, it cools the warm
liquid in the coil before it enters the
expansion valve, and two, it further super-
heats the suction gas, thereby adding to the
efficiency of the evaporator.
Expansion Valve
The expansion valve (Fig. 18), a metering and
pressure reducing control, regulates the flow
of refrigerant to the evaporator. It is located
in the evaporator housing on all series.
It is the dividing point between the high and
low pressure sides of the liquid side of the
system. Refrigeration begins at this point, it