What kinds of refrigerators are divided into according to refrigeration methods? What are their characteristics?

Refrigerators are generally divided into direct cooling type and air-cooled frost-free type according to refrigeration methods.

1. The direct-cooling refrigerator has low power consumption, slow cooling speed and high humidity in the refrigerating room, which is beneficial to the preservation of fruits and vegetables, but the freezing room needs manual defrosting.

2. The air-cooled refrigerator blows out the cold air in the evaporator through the fan, which has fast refrigeration and uniform temperature. Generally, evaporators defrost automatically once every 24 hours, so manual defrosting is not needed, so it consumes a lot of electricity. In addition, the humidity in the cold room is poor, and food is easy to air dry, which is not conducive to the preservation of fruits and vegetables.

Refrigeration is refrigeration, also called freezing, which reduces or keeps the temperature of objects below the natural environment temperature.

There are two ways to realize refrigeration, one is natural cooling and the other is artificial cooling. Natural cooling is a heat transfer process. Artificial refrigeration is a unit operation belonging to thermodynamic process, which uses refrigeration equipment to supplement energy and transfer heat from low-temperature objects to high-temperature objects, such as refrigerators.