Bambu Lab A1 Enclosure Ventilation and Cooling System

The Bambu Lab A1 is not designed to be enclosed. However, enclosing the printer and creating a negative air pressure gradient inside the enclosure improves the air quality in the room. I designed these connectors to:

1. Force room-temparature air into the Bambu Lab A1's left and right ventialtion holes to cool the power supply and motherboard.

   1. The room ->

   2. Dust filter (intake part A) ->

   3. Fan enclosure (intake part B) containing two 40x20mm fans ->

   4. Two 38mm diameter corrugated PVC pipes ->

   5. Left and right side connectors (intake part C) ->

   6. The printer's internal electronics

2. Exhaust hot, contaminated air from the enclosure out of a nearby window.

   1. The tent enclosure ->

   2. Connector (exhaust part D) ->

   3. 100mm diameter flexible air ducting ->

   4. Fan enclosure (exhaust part E) containing one 120mm high static pressure fan (with PWM speed controller) ->

   5. Optional HEPA filter ->

   6. The outside

Both intake fans push air inside the case from either side rather than operating in a push-pull configuration. From looking at a teardown video and my own cursory testing, the A1's internal airflow path is fairly obstructed and its plastic case is farily leaky, especially with its underside ventilation holes. My assumption is that better internal cooling will be achieved by forcing more cool air inside the case directly over the power supply and motherboard, forcing the warm air out through any path it can find, rather than attempting push-pull.

These are my first 3D designs and are not perfect, but the overall product works! Some hammering of magnets into their slots and glueing of various parts will be required if printing without first making design tweaks.

Most models print without supports, all with 0.2mm layer height. Many 6x3mm cylindrical magnets and M3x40mm nuts and bolts were used during construction. Designed using FreeCAD.