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Air conditioning systems with refrigerant R1234yf - General information - Edition 07.2017
1.2.4
Condenser
♦ The condenser -A- transfers heat from the compressed refrig‐
erant gas into the surrounding air.
♦ When this happens, the refrigerant gas condenses to liquid.
Note
♦ Depending on the design of the refrigerant circuit, the receiver
may be attached to the condenser or integrated in the con‐
denser ⇒ Heating, air conditioning system; Rep. gr. 87 ;
Refrigerant circuit (vehicle-specific workshop manual) and ⇒
Electronic parts catalogue .
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♦ There are different versions of the condenser; from the outside
these versions can only be identified by their part number.
Version -1- of the condenser is split into two sections (“two-
pass condenser”). Version -2- of the condenser is split into four
sections (“four-pass condenser”).
♦ This illustration shows a condenser with the receiver -C- at‐
tached.
♦ The gaseous refrigerant enters the condenser at connection
-A-; the refrigerant is then cooled down in the condenser and
turns into liquid.
♦ The liquid refrigerant accumulates in receiver -C- (with dryer)
and flows through the bottom cooling section to connection
-B-.
♦ The refrigerant capacity in a refrigerant circuit may differ de‐
pending on the design of the condenser (internal volume, flow,
etc.). Therefore, always ensure the version and allocation of
the condenser are correct ⇒ Heating, air conditioning system;
Rep. gr. 00 ; Technical data (vehicle-specific workshop man‐
ual) and ⇒ Electronic parts catalogue .
1.2.5
Evaporator
There are different types of evaporator. Depending on the design
and function, the thermal energy that is needed to evaporate the
refrigerant is drawn from the air flowing through the system (e.g.
with the evaporator in heater and air conditioning unit or in the
battery cooling module) or the coolant flowing through the system
(e.g. with the heat exchanger for the high-voltage battery) ⇒
Heating, air conditioning system; Rep. gr. 87 ; Refrigerant circuit;
System overview - refrigerant circuit (vehicle-specific workshop
manual).
Note
The following describes 2 versions of the evaporator.
1. Refrigerant circuit
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