In what form do evaporators typically exist in refrigeration applications?

In refrigeration applications, evaporators primarily exist in the form of coolers and freezers. This is because the primary function of an evaporator is to absorb heat from the environment, which cools down the air or the substance being refrigerated. In coolers, the evaporator helps lower the temperature of the air inside, preserving perishable goods by removing heat from the interior. In freezers, the same principle applies but at even lower temperatures, ensuring that food and other items remain frozen.

The design of evaporators as coolers and freezers is central to their role in various refrigeration systems, as they are essential for maintaining the desired temperature in storage spaces. They facilitate the phase change of a refrigerant from liquid to gas, absorbing heat in the process, and thus play a critical role in the refrigeration cycle. This context underscores the importance of evaporators in practical refrigeration applications, confirming why coolers and freezers are appropriate forms for them.