In view of the uneven heat transfer and high wind resistance of traditional symmetrical louver fin heat exchangers

which are most commonly used in automobile heat pump air conditioners

six asymmetric louver fin structures were proposed. STAR-CCM+ software was used to numerically simulate the structure of asymmetric louver fins

and the change characteristics of the internal temperature and pressure fields of the heat exchanger under the corresponding four working conditions were studied

and the heat transfer factor j and resistance factor f of each fin were calculated. The results show that although the heat exchange of the new asymmetric louver fin B3 group is slightly reduced

it has a significant effect on the reduction of wind resistance. When the air inlet velocity is 4.5 m/s

the resistance factor f is reduced by 31.9%

the heat transfer of the entire fin is more uniform

and there is no obvious concentrated heat transfer part on the entire fin. This study also conducted experimental research on a new type of fin

and the results show that most of the errors between the experimental and simulation results are below 10%.