Device to remove and filter from an area.

Creative Commons Attribution Noncommercial Share Alike

Commercial use is not allowed, you must attribute the creator, you may remix this work and the remixed work should be made available under this license.

Learn more or download attribution tags

Description

The device uses an high pressure axial fan to pull contaminated air (soldering smoke, 3D printing smoke, etc.) from a work area and blow it through a filter. The filter holder is designed to hold a pleat in sheet filter media (cloth or other) to increase the surface area and reduce resistance.
The fan is attached to the filter holder and tubing manifold by 4 screws.
The tubes can be extended and positioned as needed but a manifold and stand are provided if they work for your application.
The fan/filter holder can also be mounted directly to a cover for a 3D printer or such.

Materials and methods

The parts can be printed from most any material. I like Ultimaker polycarbonate because it makes very strong, not brittle parts.
The fan is any one of Sanyo's 40x40x28mm axial fans. If you use the highest flow 5V version (9GA0405P6H001), it can be powered by a USB adapter or battery. There are higher flow options but they require 12 or 24 volts.
For the power cord, I used an old phone charging cable that no longer worked because the phone connector was bad.
I used #4-40 heat set inserts and #4-40x1.5 inch screws to hold the fan/filter together and #4x3/8 inch flat head self tapping screws to attach the manifold to the stand. An M3 screw is about the same size as a #4 screw.
3/4 inch ID tubing is used to direct the air.
There is a filter installer which can be used to force the pleat into the filter media before using a rubber band to hold it to the filter holder.
The filter holder is broken into 2 parts to allow easier molding. I used the tree support option in Cura to support the cross bars.