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20251RES2: DIY Air Purifier

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Idea1:  Air Purifier with HEPA Filter Integrated into Existing Systems

It involves retrofitting a HEPA filter into preexisting air flow devices (fan, air conditioner, or building ventilation system)

Components required:

  1. Hepa filter
  2. Frame mount(custom developed)

Link: https://www.instructables.com/Diy-Air-Purifier/

Air Purifier! - the "Window Fan" Air Filtration System! - Easy DIY (w/box Fan Conversion!) : 10 Steps (with Pictures) - Instructables

https://smartairfilters.com/en/blog/how-to-make-diy-air-purifier/?srsltid=AfmBOoorhW3LA_UdJGpiJBDKDYlJ3yBFHiySSriqCVTVScae4EfqB1s_

Idea2: Continuous Air Purifier

Standalone air purifier unit with fan and filter. The fan creates negative pressure and force air to pass through the filter and removes particles. The fan and filter size may vary based on space.

Component required:

  1. HEPA filter.
  2. High-pressure axial fan
  3. Enclosure/housing (sheet metal, wood, acrylic or 3D printed)
  4. Power supply (AC plug and wiring)
  5. Indicator lights (on/off)

Link: https://www.instructables.com/Make-an-Air-Purifier-on-the-cheap/

https://www.instructables.com/3D-Printable-USB-Air-Purifier-Fumes-Extractor/

https://www.instructables.com/Air-Cleaner-Thats-Quiet-Space-Conscious-the-V-C-R-/

Idea3: Smart Air Purifier with PM Sensor and Automatic Fan Control

A smart air purifier with a real time particulate matter monitoring system. The fan speed will be automatically adjusted based on the PM level through microcontroller for optimum performance and energy saving.

Components required:

  1. HEPA filter
  2. Variable speed fan(DC preferred)
  3. PM sensor(PMS5003/PMS7003/ SPS30)
  4. Microcontroller(Arduino Uno/ XIAO ESP32)
  5. Motor driver
  6. Display (optional)
  7. Enclosure/housing (sheet metal, wood, acrylic or 3D printed)

Tools/ Machine required:

  1. Soldering
  2. Breadboard, wires
  3. Drilling
  4. 3D Printer
  5. Laser cutter
  6. Power tools 

Link: https://developpa.io/arduino-air-purifier/

https://www.instructables.com/Air-Purifiers-Arduino-Speed-Control-a-4pin-Fan/

https://www.instructables.com/DIY-HEPA-Air-Purifier/

Fig: Block diagram illustrating the connections for a DIY air purifier where fan speed is automatically adjusted based on particulate matter sensor readings.