LCD Mount for Khadas Captain + Edge / Edge-V


#21

Captain is on its way through the factory already. Maybe @Gouwa can consider that for Captain v1.1!


#22

regarding the SSD if your referring to the nvme maybe include an adhesive heatsink that attaches to the ssd or a metal back plate for for the case that conducts heat from it.


#23

another improvement for the captain 1.1 would be a Power over Ethernet integration that way it would have a stable internet connection and act as an alternative source of power without having the barrel jack in front


#24

Changelog:

  • Switched to 2mm thick acrylic sheeting
  • Added space for the exhaust manifold
  • Only 3 pieces required for assembly, screen, top cover, bottom tub
  • Bottom tub made via hot-bending and gluing (prototyping phase)


#25

SSD Temperature / Resultant Airflow:

  • Gets to around 40C-ish in my physical tests.
  • Simulation looks about right in my opinion (the case does feel warm in that way).
  • Not too sure what to do about it right now, will leave these here to contemplate.

If the case was oriented vertically, the hot air could escape through the port-region. However, assuming it’s used horizontally (as depicted), then it will be a little more challenging.


#26
  • Combined air flow with fan + heat from SSD
  • Do note that I did not include the SoC as a heat source
  • Air currents form beneath the board to transfer heat to the colder end of the board


#27
  • With RK3399 SoC at 60C.
  • Noted the re-circulation (trapped) hot air beneath the Captain Carrier Board.
  • Battery modeled as a solid piece of polycarbonate.
  • Assumes perfect thermal contact between SoC and heatsink.


#28
  • Heatsink surface temperature plot.
  • Hottest point is where the SoC is.
  • Aluminium is a good conductor, not much difference in temps.


#29

Results:

  • Vent holes have eliminated re-circulation of hot air.
  • Side vent holes necessary to break re-circulation pattern.
  • Decrease in the size of the “battery hot spot”.
  • Simulation assumes that SSD is a static 40C source, and SoC is a static 60C source.

#30
  • Adding more holes improves result even further.
  • Limit to how many holes I can add, without compromising the acrylic.


#31

Great to see.
More Vents better cooling,
Been saying this for years with those other not so Quality Media players small black boxes no vents.