Abstract: An experimental research was conducted on the changes in energy efficiency grades of typical commercial refrigeration appliances under the GB 26920—2024 standard, and the maximum allowable values of energy consumption and the variation range of energy efficiency grades were analyzed. The results show that, the GB 26920—2024 standard significantly raises the energy-saving requirements for vertical display freezer, horizontal display freezer and stainless steel refrigerators. Compared with the current standard GB 26920.2—2015, the maximum allowable values of energy consumption of vertical display freezer and stainless steel refrigerators decreased by 24% to 35% under the GB 26920—2024 standard, and the energy efficiency grades dropped by 2 to 3 grades. The maximum allowable values of energy consumption of horizontal display freezer decreased by 16%, and the energy efficiency grade dropped by 1 to 2 grades. The requirements for commercial ice makers under the GB 26920—2024 standard are relatively moderate. Ice makers with R290 refrigerant system can reach the energy efficiency grade 1 and with R404A refrigerant system can reach the energy efficiency grades 2 to 3.

Key words: GB 26920—2024, Energy efficiency grade, Vertical display freezer, Horizontal display freezer, Stainless steel refrigerator, Icemaker