Máy hút khói hàn (Solder Fume Extractor) dạng modular

This is a simple modular solder fume extractor using readily available parts and minimal soldering. It is powered via USB-C and has a speed controller.

BOM

I got my parts from Amazon Germany, but they should be available everywhere on AliExpress.

Part

Amazon DE link

120mm PWM-controlled fan

https://www.amazon.de/-/en/gp/product/B0DJDDCG4M

USB-C 12V PD trigger module

https://www.amazon.de/-/en/gp/product/B0D9NSC3QP

PWM fan speed controller

https://www.amazon.de/-/en/gp/product/B0D8PRTCV7

Activated carbon filter

https://www.amazon.de/-/en/gp/product/B0DSP7FR11

PWM fan extension cable (optional)

https://www.amazon.de/-/en/gp/product/B09SKYRB3V

Additionally, you'll need a USB-C charger capable of delivering 12V, a soldering iron, two short wires, and solder wire.

Printing

• Parts have been oriented for printing

• 30% Gyroid infill

• 0.3 layer height

• Supports recommended. Omitting them for the honeycomb pattern specifically should be fine

Assembly

1. Soldering first. Diagram:

2. Optionally, plug in the fan and test if everything works

3. Insert electronics into PSU box. Remember to screw down the potentiometer of the speed controller

4. Plug the PWM extension cable into the speed controller

5. Put the PSU lid onto the PSU box. Inserting the side with the long clipper first helps. Make sure to route the extension cable through the hole on the left side

6. Insert the fan into the fan box. Make sure to pull the fan's PWM cable through the rectangular hole on the right side first

7. Connect the fan's PWM cable with the PWM extension cable sticking out of the PSU box

8. Slide the cable box onto the left side of the PSU box

9. Cram the excess cable into the cable box. Route the cable over the notch on the PSU lid

10. Place the fan box on top of the bottom assembly. Make sure not to accidentally squish the PWM cable

11. Slide the sliders into the grooves on the sides. Make sure you use the slider with the cutout on the side with the cable

12. Put the fan box lid on top of the fan box

13. Insert the activated carbon filter into the filter cover. If your filters are too large, you might need to squish them. If they are too small, you might want to print shims to hold them in place

14. Clip the filter cover onto the fan box

15. Congrats, you're done

Upgrades

While a PC fan is usually good enough, it's worth considering replacing it with a more capable fan, like the Noctua NF-F12 iPPC. I haven't personally tested this, but it should fit into the fan box without any modifications.

Modularity

The sliders are meant to be replaced to extend functionality without reprinting anything else. You could make sliders with a big foot for better stability, or ones with a swivel in the middle for better air direction.