Ok I salvaged the last piece which no doubt is very important.

the required stages are as follows

1. Compress the refrigerant 

2. Leaves the compressor from the discharge tube and raises the temperature to over 100 degrees

3. Discharge goes to radiator
This cools the hot high pressure refrigerant

4.the refrigerant moves from the radiator to the drier or expansion tube.

5. The refrigerant is pushed through the small tube as a liquid.

6. The small tube opens up to the evaporator

7. The liquid expands into a gaseous state rapidly as it passes into the larger space of the evaporator.

8. After the evaporator the compressor vacuums the refrigerants into the compressor.