R22 Freezer

[Kompulsa]

Hello.

I have been seeing people in forums and websites discuss R22 freezers, as if it is possible to use R22 for that, yet some people told me that I can't safely use R22 for that. My compressor is designed for R22, and I really want to be able to freeze with it, even if a change of refrigerant is required...

This is one of the threads I saw: http://www.refrigeration-engineer.com/forums/showthread.php?22627-Blast-Freezer-with-R22

Could someone help with this?

Thank you.

[The Viking]

Everything is possible, the question is what you are willing to pay...

R22 @ the temperatures required for a freezer would run below 1bar on the suction side, making the compressor having to work much harder than it ever was designed for. (it will most likely also create problems with getting the oil back to the compressor)
Anything running outside it's design envelope is likely to suffer premature failures.

Before you decide what refrigerant your system should operate on it is good practice to check the entalphy charts for the refrigerant and properly design the system in theory, that will save a lot of hassle later.

[Kompulsa]

I don't think this type of compressor is supposed to circulate oil, I only see air come out of it when it is on...

(Rotary Sealed Hermetic R22 Compressor)

[chemi-cool]

As the Viking said, your compressor is not designed to work in these temps.
A substitute for R-22 is R-422D.
All compressors [well, almost all] circulate oil in the system.

[Kompulsa]

Maybe you're referring to automotive air conditioning. I am talking about residential units.

Of the four compressors I have used so far (two R134a fridge and two R22 residential air conditioner types), none of them pumped out oil.

[monkey spanners]

Maybe you're referring to automotive air conditioning. I am talking about residential units.

Of the four compressors I have used so far (two R134a fridge and two R22 residential air conditioner types), none of them pumped out oil.

Watch this link, gives an idea of what comes out the discharge when running...

http://www.youtube.com/watch?v=hapg3FbD9Es

[stufus]

The oil is carried in the refrigerant!!!!!
And if you are running these comps open to atmosphere , i hope you're changing the oil afterwards
Cheers
Stu

[The Viking]

.
A long time ago The Viking could sometimes be seen banging his head against a brick wall but nowadays he just walks away, silently shaking his head...

[Grizzly]

Wise words guys!
Thanks for the link MS. Really interesting.
I tried to add rep points but have got to spread the love some more first!
Grizzly

[Emmett]

.
A long time ago The Viking could sometimes be seen banging his head against a brick wall but nowadays he just walks away, silently shaking his head...


Amen Brother!!!!!!

[hantstwo]

in refrig school 1981 i saw a residential R22 freezer uprite 20 cu ft i believe it was a sears product