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Refrigerator with two compressors - How do they do it?
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christopherwatkins:
Guys, thank you for your comments. We have a Samsung refrigerator and it often breaks, especially I am concerned that the icemaker breaks every 2 months and I am tired of fixing it. I decided we'd better spend a little more money and buy a good refrigerator. If you can recommend a good refrigerator, I will appreciate your advice. During the research, my attention was drawn to this site ianboer.com.au. I liked the characteristics of the refrigerators they have, if anyone has had experience buying an industrial refrigerator, please let me know.
amyk:

--- Quote from: christopherwatkins on June 10, 2020, 08:35:32 pm ---Guys, thank you for your comments. We have a Samsung refrigerator and it often breaks, especially I am concerned that the icemaker breaks every 2 months and I am tired of fixing it. I decided we'd better spend a little more money and buy a good refrigerator. If you can recommend a good refrigerator, I will appreciate your advice.

--- End quote ---
The archiac bump post will get an equally archiac recommendation: A GE Monitor Top. (Despite their age, they are actually extremely efficient. Used ones in working condition sell for astronomical amounts.)
Labrat101:
Its what is called a cascade system .
were the second compressor acts as the condenser of the first stage .
I have not see one of these for over 40 yrs .
each system will have a different gas .in our old lab we had a freezer for testing equipment to work @  -60 c for ships working in the antartic
 it used B13a and R13a .
B13a was a custom gas . they both have different properties and are quite difficult to set up so both systems are balanced.
There are a few different gasses that these system work with .
Your diagram is correct but you need a tech that works with these units .

Warning be careful one stage will have R13  it is very high pressure  and I believe its been banded now .
 I actually built a few of these sub cooling fridges in the 70 & 80 for the company I worked for .
  each one is custom built for the customer.

I guess this freezer is not 40 yrs old .
The newer fridges use R***  A butane derivative

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