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@@ -23,3 +23,5 @@ The purpose of this project is to create a small air purifier suitable for a bed I selected a readily available HEPA H13 rated filter normally used in cheap vacuum cleaners and available from Bunnings Warehouse. The rest of the air purifier is based around that filter. I then selected a range of 120mm computer fans with relatively high static pressure ratings (>2.0 mmAq) that could operate on 12vDC. As the fans are 12vDC I used a USB 'booster cable' which steps-up the voltage of any USB-A port from 5v to 12v; these cables are available online or from a range of electronics shops such as Jaycar. After selecting the components I then designed a fan housing using Fusion 360 that provides the interface between the 120mm and the HEPA filter. The filter comes with a removable seal/cover at one end, so I use that end as the base of the unit and fit the fan to the top. After basic testing with a small smoke generator to ensure the selected fans could draw air through the filter to a reasonable standard I have determined the project suitable for release so others can create their own version of this device both for use in their homes and for further testing. + + |