Abstract: The flow field distribution characteristics of the refrigerator air duct system are the key factors affecting the refrigerator cooling efficiency and room temperature uniformity. In the past, air duct design mainly relied on CFD flow field simulation, which had inherent limitations, especially single-cycle air-cooled refrigerators, which were difficult to directly evaluate the rationality of room cooling allocation, and the whole room temperature field simulation faced many challenges due to the complexity of the model and the large amount of mesh. In order to accurately evaluate the air volume distribution, a single-system air-cooled refrigerator was taken as the object, and the CFD simulation results were compared with the test data to verify the quantitative relationship between the air volume distribution and the temperature field, which was verified to control the temperature simulation error of the refrigeration and freezer chamber within ±2 ℃. Based on this model, different air duct schemes can be evaluated and optimized in advance at the product design stage, reducing the dependence on physical prototypes, providing a standardized evaluation basis for the air duct design of air-cooled refrigerators, thereby shortening the development cycle and achieving better system energy efficiency matching.

Key words: Co-simulation, Airflow distribution, Dynamic cooling capacity matching, Temperature uniformity, Air duct design