1. Domestic household refrigerators are represented by the letter B;
2. Use classification: C is freezer, D is freezer, and CD is freezer;
3. Number: indicates the effective volume in liters (L);
4. Refrigeration mode: Z stands for direct cooling refrigerator, or it is not marked; W is an indirect refrigerator (air-cooled frost-free refrigerator); P is frequency conversion refrigerator; A is intelligence; Wait a minute.
5. Serial number of the manufacturer's design: represented by the numbers 1 1, 12.