Abstract: Through the finite element analysis method, the wind speed distribution of two kinds of air conditioning heat exchanger corresponding to the axial fan suction air supply and the blowing air supply is modeled, solved and analyzed, and the flow path is designed based on the wind field distribution characteristics of the heat exchanger. This paper innovatively proposes a scheme to design the flow path of heat exchanger based on the distribution characteristics of flow field at the outlet side of the heat exchanger. The solution of the flow field distribution law of the heat exchanger formed by the two air supply forms shows that the velocity field distribution law of the two air supply forms is opposite, and the suction air supply has better uniformity, which can directly design the flow path evenly. The blowing type velocity field distribution is poor, so the blowing type is selected the flow path of the heat exchanger is designed in the form of air supply, and the heat exchange effect is equivalent to the uniform distribution of wind speed.

Key words: Axial fan, Suction type, Blowing type, Velocity distribution