Cube ice machines are commonly seen as vertical modular devices. The upper part is an evaporator, and the lower part is an ice bin. The refrigerant circulates inside pipes of a self-contained evaporator, where it conducts the heat exchange with water, and freezes the water into ice cubes. An icemaker, ice generator, or ice machine may refer to either a consumer device for making ice, found inside a home freezer; a stand-alone appliance for making ice, or an industrial machine for making ice on a large scale. The term "ice machine" usually refers to the stand-alone appliance.