Abstract: With the popularity of fresh air conditioning, air conditioning with fresh air function is constantly launched in the market. As the main core index of fresh air conditioning, fresh air volume affects the user experience. In order to make the design optimal and reduce the loss of fresh air volume, through the analysis of the structural components of the fresh air pipe components of the fresh air module system, and then optimize the combination of fresh air pipe components to reduce the friction coefficient along the fresh air pipe and increase the inner diameter of the fresh air pipe; And through the structural simulation analysis of the air outlet parts, so as to optimize the diversion structure of the air outlet parts to improve the air boundary layer and eddy current at the outlet, so as to minimize the influencing factors of the parts connected with the new fan system, and improve the fresh air volume of the whole machine, accumulating empirical data for the subsequent design.

Key words: Fresh air volume, Fresh air tube, Fresh air module