1. Air cooling: Air cooling technology means that fans are installed inside the refrigerator and freezer compartments, and the fans circulate air to circulate the air inside the refrigerator and make the temperature more uniform. This ensures even temperature distribution throughout the entire refrigerator, resulting in better food refrigeration and freezing.

2. Direct cooling: Direct cooling is a traditional refrigeration method that uses one-way refrigeration, that is, a condensing tube is set up in the refrigerator or freezer, and the cold air emitted by the condensing tube reduces the temperature inside the refrigerator. Direct-cooling refrigerators usually only have condensation pipes in a certain area, resulting in uneven temperature distribution inside the refrigerator, which can easily lead to higher or lower temperatures in some locations.

Generally speaking, air-cooled refrigerators use fans to circulate air to cool down evenly and keep the temperature inside the entire refrigerator uniform; while direct-cooling refrigerators use one-way cooling through condenser tubes, and the temperature distribution is relatively uneven. Therefore, air-cooled refrigerators are generally better at maintaining the freshness and quality of food.