Activated Carbon Filter

I Introduction: This air purifier utilizes a 25mm x 120mm fan and is 3D printed using PLA, easily printable even on an A1 mini. The entire product requires no supports, minimizing material waste. A magnetic fastening system connects the top and bottom, facilitating filter replacement and accessory adjustments. Except for the top cover and base, components are infinitely stackable (ten fans are no problem). It accommodates HEPA filters up to 28mm thick. Placed in an enclosure, it effectively removes volatile organic compounds and fumes from the 3D printing process.

For optimal airflow and reduced noise, a dual-fan "hamburger" configuration is recommended, with airflow directed upwards through the top and downwards from the bottom. The suggested assembly order, from top to bottom, is: top cover (optional) → HEPA filter → fan → activated carbon filter → fan → base.

Regarding the Design:

The fan housing is compatible with 120mm fans up to 30mm thick, and features a wiring channel at the rear.

The activated carbon filter housing employs a two-layer design. Activated carbon fiber is placed at the bottom, held in place by a mesh filter on the left, followed by activated carbon at the top, preventing dust and debris from spreading.

The HEPA filter housing accommodates filters up to 28mm thick. A support structure at the bottom eliminates the need for adhesive; simply insert the appropriately sized filter.

The base design balances structural integrity with material efficiency. A conical structure in the center reduces wind noise during exhaust.

The top cover features circular holes with simulated holes at the corners for more focused airflow. The simulated holes can be omitted (without affecting performance) for those sensitive to patterned designs.

Purifier Dimensions: 134.5mm L x 134.5mm W x 164mm H (single fan) / 196mm H (dual fans)

II Required Materials: 25mm x 120mm fan, M3 x 25mm self-tapping screws (for 25mm fans; adjust for other thicknesses), PWM speed controller, 12V 2A power adapter, six 2mm diameter neodymium magnets, activated carbon filter fiber, pre-filter fiber, HEPA filter, high-iodine-value 4mm cylindrical activated carbon.

III Purchase Links (Search if unavailable):

【Taobao】7-day unconditional return https://e.tb.cn/h.hfxbVvB4uqYMTUS?tk=wE5dVCG4sxg CZ356 "4-wire fan PWM speed controller PD QC fast charging USB Type-C DC 24V 12V 5V cooling computer controller"

【Taobao】https://e.tb.cn/h.hfkKE4vYy55xYUO?tk=moq5VCGfpUu HU591 "Jingsai white power adapter 12V 3A universal monitor display router DC 9V switch set-top box 5V 2A desk lamp audio 7.5V electronic piano optical cat 6V 1A level gauge charging cable"

【Taobao】4x money-back guarantee https://e.tb.cn/h.hfk7BT7sL38ddF3?tk=DQMTVCGU8Bh HU293 "ARCTIC P12 PRO single computer chassis fan high air pressure computer desktop fan 12cm high speed white"

【Taobao】4x money-back guarantee https://e.tb.cn/h.hfOSVOFlBAYWgpY?tk=KWD3VCGfM0B HU591 "Jinchao 304 self-tapping screws nuts countersunk internal hexagon male and female furniture connecting plate connecting bolts M3-M8"

【Taobao】7-day unconditional return https://e.tb.cn/h.hfxck0CDsHIqWv4?tk=knALVCG54Xw HU006 "HEPA filter paper various materials and sizes customized DIY air purifier air conditioner fresh air filter FFU"

IV Assembly Materials: Hexagonal screwdriver, super glue.

V Assembly Instructions:

1. Secure magnets into designated recesses using super glue; observe magnet polarity.

2. Route fan wires through designated channels, trim excess wire, insert fan into housing, and secure using self-tapping screws.

3. Line the bottom of the activated carbon housing with activated carbon fiber, cover with mesh filter, and add activated carbon.

4. Cut HEPA filter to fit HEPA housing. A pre-filter can be added on top of the HEPA filter.

5. Connect fan wires to PWM speed controller, stack filter housings, and connect the power supply.

If you appreciate my design, please consider boosting this project. Your support is greatly appreciated.

Important Notices!!!

1. This design is copyrighted; commercial use requires my explicit permission.

2. Designed for the ARCTIC P12 PRO fan, compatibility with most fans is expected, but incompatibilities may arise. Contact me to resolve such issues; modifications will be made as needed.

3. Tested on an A1 mini using PLA. Large-scale prints may exhibit warping at the edges of the filter base. Currently, I lack an effective solution. Suggestions are welcome in the comments section.