Why is ice not deposited in a freezer?

Answer 1

I assume you mean the ice build up in some freezers? its because some freezers have whats called a hot gass system or defrost installed in them. A hot gas system is... while the freezer is in its off cycle the controller will open up a valve (usually solinoid valve) in the hot gas pipe/line. this line goes from the discharge line to the suction line usually. There are all different hot gas pipe runs, im going the most common so it is less confusing. There for shuting off the valve in the discharge line (the pipe that leaves the compressor) all warm/hot mass will always move toward a cooler/cold mass. since the suction pipe (bigger pipe entering the compressor) is cold the hot refrigerant will move through the hot gas line (defrosting the refrigerated space) to the suction pipe. usually there is some type of component added further down the suction line to save the compressor from and condensed refrigerant entering the compressor.... hope this helped