The Influence of 24V power supply Fan Vortex on Heat Dissipation(3)

●Low technical requirements. Modular power supplies are typically equipped with standardized front ends, highly integrated power modules and other components, thus simplifying power supply design.
●The module power supply shell has a three-in-one structure of heat sink, radiator and shell, which realizes the conduction cooling mode of the module power supply and makes the temperature value of the power supply approach the minimum value. At the same time, the normative packaging of the module power supply is given.

The fluid passing through the outlet of the axial flow fan is actually the fluid flowing forward along the axis, so what effect does the actual rotation direction of the fan have on the cooled area inside the power supply?

Under the dc switching power supply model, we recalculate the two models by adjusting the rotation direction of the axial fan without changing the mesh division of the model. After the calculation converges, the influence of different fan rotation directions on the heat dissipation of the whole power supply is analyzed by comparing the transition of the flow field and the sectional distribution of the temperature field in the power supply under these two conditions.

By comparing the two analysis results, we found that during the analysis of this model, the direction of fan rotation has a particularly large impact on the distribution of the flow field and temperature field inside the 24V power supply. In terms of flow field, because the rectifier bridge part of the model is relatively low in size and the PFC radiator part is relatively high, in this case, the rotating direction of the fan has a very significant impact on the flow field. When the fan rotates clockwise, the vortex around the rectifier bridge radiator is small, and the flow field is relatively open, which is conducive to the heat dissipation of the rectifier bridge radiator. However, when the fan rotates counterclockwise, there are many vortices around the rectifier bridge radiator, which is not conducive to the heat dissipation of the rectifier bridge radiator. These differences can also be further proved by the temperature field distribution of the dc switching power supply supply section.