Freon is run through copper tubing in a refrigerator chilling the air inside the insulated box that makes up a refrigerator The temperature drops, chilling anything inside.
When you plug in your fridge, the electricity energises the freon in the copper piping, which then spreads all over the fridge cooling it down. The biggest pipes are at the top, which pushes cold air...
Hot food will cool down as a result of heat radiating away from it, as a result of touching a cooler plate, or as a result of evaporation,(when moisture evaporates from a source it will remove some...
It has to cool down or the whole fridge will get warm.
Another Answer.
Supposedly, modern refrigerators can handle hot food without a negative impact on other food in the fridge. Personally, I would...