Huawei Sun2000-L 60mm Fan Holder, V2
Description
This is an edit of HsPray (Thomas Zeisler) original design. All credit for the initial project, measurements and so on need to go to him. With the way this kind of inverter is mounted to the wall, there is a significant gap (around 22mm) between the end of the fin stack and the wall behind, presumably to allow natural convection when the inverter runs fanless. I've added a baffle into the design, to force the large majority of the fan airflow into the heatsink channel itself, hopefully increasing overall thermal efficiency at very low noises. I've printed my first couple of prototypes using PET-G, 0.5mm nozzle, 0.8mm extrusion witdth, with an infill of 15-20%, three vertical and horizontal shells, layer height 0.2. You will get a very sturdy print, overall weight is about 50 grams per piece. Once printed, the part might fit a bit loose on the heatsink, you'll need to heat up the two clips that grab the heatsink and slightly bend them in to create an optimal grip. The fan holes are printed at a 3.6mm diameter, you should be able to just screw in two M4 bolts and create the threads that will hold the fan properly. I've created on the left side of the bracket a small block to ziptie the fan cable onto as a sort of strain relief. Mirror the whole print if you want this detail on the right. Overall results are very promising, my inverter lives in a hot room (facing south-west) and it dropped during peak production from 57-60°C to 45-47, in above 35°C ambient air; with the fans running just at 5V creating only a slight breeze.
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