It will refrigerate food that you put in it for your tames as long as it is powered by a Tek generator.
Tek Trough
Put food for your nearby pets in this, and they'll automatically eat it when hungry! Can refridgerate items, so long as it's powered by a Tek Generator!
More Tek Trough Tips
If you are on old mobile then this doesnt require a tek generator so you can use a regular generator instead.
If you are on ark use or pc though yeah you need a tek generator.