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AUTOMATIC AIR CONDITIONING SYSTEM
[M403] 4-7
3 . RECEIVER DRIER
The amount of refrigerant circulating varies with the heat
load changes . The receiver driver supplies the amount of
refrigerant necessary for the cycle according to such
changes .
1) It removes bubbles from the condensed refrigerant so
that only liquid refrigerant may be delivered to the expan-
sion valve. (If bubbles are present, the refrigerant passing
through
the
expansion
valve
varies
in
quantity,
temperature, and pressure, resulting in insufficient cooling .)
2) It removes moisture from the refrigerant .
3) It removes foreign substance from the refrigerant .
4) It permits a visual observation of the amount of refriger-
ant through the sight glass . ;
,- Sight glass
Plate
Filter
I
Plate
Pipe
I
C4-1015
Fig. 8
The receiver drier consists of a strainer to remove foreign
substance, desiccant to absorb moisture from refrigerant, a
sight glass to check the amount of refrigerant .
Use of sight glass for determining refrigerant charge level on R-134a Systems is not recommended.
5
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