BMW 3 series E46

1 — the fan
2 — the evaporator
3 — a throttle
4 — service joining of low pressure
5 — service joining of a high pressure
6 — a dehumidifier
7 — the condenser
8 compressor:

And — external air for condenser cooling
b — warm air, is taken away in an environment
With — not cooled air passing through the fan of a heater
d — the cooled air arriving in salon
And — a high pressure (a coolant in the gaseous form)
In — a high pressure (a coolant liquid)
With — low pressure (a coolant liquid)
D — low pressure (a coolant in the gaseous form)