There are two kinds of evaporator coils inside a beverage refrigerated unit ，one is  brass coil and another is aluminum coil, brass and more general applications, the aluminum evaporator tubes are prone to corrosion jerry cost commercial practice, a certain time to buy supermarket freezer to seriously brass supermarket freezer evaporator.

Most belong to the supermarket freezer commercial refrigerator, and several more will be equipped with air-cooled supermarket freezer evaporator. Supermarket freezer inside evaporator coil has copper tubes and aluminum are two, just to show in front of consumers and evaporator fan frame, a lot of people do not know this thing inside the freezer on exactly what is the use, the following safety Deli freezer Xiaobian careful to answer about the role of the evaporator in the supermarket freezer.

Supermarket freezer evaporator by a group or several groups of coil components. Absorbing heat coil through the wall surrounding medium (air or water) boiling vaporization (evaporation), so that the temperature of the medium surrounding the coil to reduce or maintain a certain low temperature, so as to achieve the purpose of cooling.

Supermarket freezer evaporator is to allow low-temperature liquid refrigerant exchanges heat and needs cooling medium heat exchanger. Thus, the evaporator coil should be placed in refrigerated space required medium, the air conditioner inside the freezer on the inside wall of the evaporator and air cooler for the production of low-temperature water chiller evaporator coil in cold water tank shell .

Refrigerator freezer evaporator sense temperature changes and pressure changes within the supermarket freezer, call the appropriate temperature and pressure of the evaporator temperature and pressure values, there is a certain relationship.