So, I am trying to wrap my head around the fundamentals of the a/c system. I don't have any car related question, but I think if I, and others understand the basic operation, it would help in diagnosing any future problems.

This is what I understand so far:

1. Start at the compressor: refrigerant is compressed to the point that it becomes a liquid, it gets pumped through the condenser to cool the liquid refrigerant.

Q: Why exactly does it get hot? Is it mainly because of the compression?

2: The now cooler (still liquid) refrigerant passes through the receiver/dryer where it is basically filtered of any dirt/moisture.

3: Goes via "high side" line to expansion valve,

Q: From what I understand, the expansion valve is kinda like a garden hose sprayer. When the refrigerant is "sprayed" it boils and evaporates,

Q2: Is the refrigerant already at boiling point before it actually gets there? Does it not boil because of the pressure and lack of having anywhere to boil out?

4: The now "boiled" out refrigerant is now a vapor. At this point, it absorbs heat from the cabin, and transfers it back to the compressor via the low side line.

Q: What specifically does the accumulator do in this process?


I might be way off, but I was hoping one of the a/c gurus might be able to chime in and correct me.

__________________
Eugene

10 E63 AMG
93 300te 4matic
07 BMW X3
14 Ford F-150 Fx2