Abstract: Based on the analysis of the air-conditioning market of refrigerated vehicles in China, this paper briefly introduces the refrigeration principle of non-independent refrigerated vehicles air-conditioning system. Effects of different fin spacing of evaporators on the performance of the whole air condition system, evaporator drainage and heat transfer are experimentally investigated. The results show that the heat transfer performance of air side will be improved with the decrease of the fin spacing under the same experimental conditions, however, the drainage performance of the defrosting water may get worse. Therefore, the optimum fin spacing can effectively improve the performance of drainage and heat transfer of evaporators.

Key words: Refrigerated vehicles, Air Conditioners, Evaporator, Different space between evaporator fins