Portable AC 2-hose conversion adapters

thingiverse

Adapters for turning a portable AC equipment into a 2-hose solution, increasing effectivity. These adapters have been designed to suit a 150 mm exhaust hose, and a 160 mm inlet hose. The unit I used were a Deltaco Smart AC 9000 (SH-AC01), but other units with a 150 mm exhaust hose should work too. The exhaust connector outer parts may be used to decrease the risk of debree coming into the hose when the unit is off. There is a "filter holder" that may be used to clamp a finer filter, preventing flies and such from getting into the hose. It's recommended to keep the restrictiveness low though, as not to effect the effectiveness of the unit too much. The hose screws into the adapter, and the ridges in the adapter thus will need support to print well. The inlet hose I used were a 160 mm aluminium stretch duct (https://www.biltema.se/en-se/construction/hvac/ventilation/ventilation-hoses/alu-ventilation-duct-2000040328), which is glued in the connectors which then is screwed to your choice of "wall-through". The outer parts of the inlet have a less density mesh for possible attachment of a filter or mosquito-mesh. Even here it's recommended to keep the flow-resistance low. There is also a part with fins to protect from water ingress and to direct the flow somewhat. As the suction from the AC unit is quite strong, I don't think it will help much if the unit is on however, but might be nice to prevent rainwater to collect in the hose/machine when turned off. The adapter to the machine I designed with cardboard, glue, and expanding foam to get the correct angles (the machine inlet were covered by painters tape when applying the foam). When dry, the foam were carved out, and the inlet connector glued to the box. Sealing tape were applied to the edges of the box. The box is held in place with a belt-strap, thus not leaving any marks or making alternations to the machine itself. Both connectors have a pit for a M4 nut in the outside base for the four holes. A screw might then be screwed from the inside. If the screw length is long enough, the protruding bit of the screw might be used to attach the filter clamps and such to the outside using wing-nuts for ease of use (might help for filter cleaning). The parts have been designed to eliminate the need for supports for all but the exhaust hose connector. I would recommend the use of a filament to withstand higher temperatures. I used ABS. It might be nice to use a brim, as these are quite large parts. 12h+ for a few when I printed. Btw: This window leads to a balcony, a few storys up, thus I don't think anyone else may unscrew the wingnuts holding the entire board in the window frame.