Audi Q7 e-tron quattro 4M - Electrical AC Compressor V470 Function

78
Refrigerant shut-o valves
Shut-o valves N640, N641, N642 and N643 are arranged in a
compact valve block and are activated by control unit J1024 via
LIN.
The switching positions of the valves define how the system
operates. The following valves are also integrated:
• Electronic expansion valve N636 with LIN interface from
thermal management control unit J1024
• Refrigerant shut-o valve V424 for shutting o the evaporator.
Refrigerant
shuto valve 2
N640
Refrigerant
shuto valve 3
N641
649_034
Refrigerant
shuto valve 4
N642
Refrigerant
shuto valve 5
N643
Non-return valves
The non-return valves ensure that the refrigerant flows in the right
direction in the various operating modes.
649_134
Electrical AC compressor V470
The electrical AC compressor V470 is the core element of the
vehicle air conditioning system and has been redeveloped for use in
the AudiQ7e-tronquattro. The electrical AC compressor draws in
the cold, gaseous refrigerant at low pressure. The refrigerant is
compressed inside the compressor, increasing the pressure. The
temperature of the refrigerant increases.
The compressed, hot refrigerant flows in a gaseous form from the
AC compressor in the valve block and then, depending on operating
state, on to:
• In cooling mode: the condenser
• In heat pump mode: the heat exchanger for heat pump opera-
tion
The electrical AC compressor V470 can, if required, be used both
for heating and cooling the cabin and hybrid battery unit AX1.
Type Scroll compressor
Compression volume 33 cm
3
Weight 6.3 kg
Engine speed 700–8500rpm
Max. power consumption 5.3 kW
Operating voltage range 195 – 450 V
649_033
Refrigerant connection
High-pressure side
Refrigerant connection
Low-pressure side
AC compressor control unit
J842
Connection for Electric drive power and
control electronics module
JX1
Connection to 12-volt electrical system
Reference
For more information about cleaning the refrigerant circuit as well as the various function tests on the shut-o valves, please
refer to the Workshop Manual.
ProCarManuals.com
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