There are various discourses on cooling, and there are various existing duct design ideas, but this model was designed with a completely new approach.

All existing designs are focused on how accurately or in which direction the wind blows. This design blows more air with the same fan.

How is that possible?

Have you heard of the Coandă Effect?

This is a fluid dynamics term that refers to the phenomenon in which when there is a flow of a fluid, nearby fluids stick together and are dragged along by the flow, ultimately amplifying the flow of the fluid.

The most common examples are Dyson hair dryers and fans. The wind created by the fan comes out of a thin circular ring, but by following the flow of the wind, a larger wind is generated in the center of the ring.

The fan duct I designed works on the same principle. I made it so that additional air can be drawn in from the outside through the center of a regular duct hole.

This effect ends up blowing out more air than the air sucked in by the fan, and since this air does not usually pass through the fan, it is theoretically cooler. This can ultimately lead to a better cooling effect.

Print Test result

The test results showed that the new design performed better than expected. When using the existing fan duct, the upper surface was printed roughly due to sagging at the 100mm bridge, but when using the new design, the upper surface of all the same sections was printed cleanly.

Can you guess which one used my fan duct? It's too easy.

If possible, I recommend printing with a material that can withstand high temperatures, such as ABS or CF

To ensure clear print quality, do not change the print direction of the preset model.

I hope this helps those who want better cooling with K1 or K1MAX

K1, K1MAX FAN DUCT COVER (Coandă Effect)

0.2mm layer, 2 walls, 15% infill

0.16mm layer, 2 walls, 15% infill

0.2mm layer, 3 walls, 15% infill