How about a normal fridge, but with a small fan at the bottom that pushes the cold air into a bag before you open the fridge? Fans are relatively low power, th

How about a normal fridge, but with a small fan at the bottom that pushes the cold air into a bag before you open the fridge? Fans are relatively low power, the only issue is that we'd have to detect someone opening a door. We could have a automatic sliding door that is button operated, then we can have the fridge open when the cold air has been sucked into the bag. When the door closes, we exhale the cold air from the top of fridge, pushing the normal air out the bottom. The fridge would operate similar to an airlock would, only using cheaper fans since we don't need to change air pressure.