I had to tease, but a fridge is a fridge, not an air conditioner, and like you suggest, it would run constantly, the electricity would be high $$$$$, and probably hard on the fridge unit ...
I know plants develop best around 75-78 degrees, BUT ... I cant help but wonder how these marvelous plants have thrived all these centuries with outside weather and temps being all over the map ... boy, Mother Nature sure must be dumb, its a good thing she has Man to correct her mistakes ... its a WEED !!!! ...