Personal Air Conditioner

This was a fun project from some existing, new and printed parts. You will have to adapt depending on the heat exchanger and cooler you use. The concept is to place ice and water in the lower section of the cooler. Place insulation above the ice. Then pump the cold water through the exchanger and blow the air across and out of the cooler.

Note: this is just for a personal air conditioner. It will not cool a room. It just blows across a bed or couch where a person can feel it.

All of the stl files are here, but I would encourage you to do test prints to see if they will work for you. For instance the holes in the electrical box may be the incorrect size for the components you might buy.

Parts:

3D stills
Electrical box
Electrical box lid
Fan bracket
Outflow manifold ring
Intake manafold ring
Tubing clip
Pump cage - stops ice pieces from clogging the pump

sts uploaded, but will need to be modified based on individual sizing:
Exchanger bracket - User will need to design based on sizing of exchanger
Ice cage for pump - prevents chips of ice getting into the pump

Recycled
Computer Fans - 2
Wire
12V power supply from external computer hard drive
Rigid insulation
Schedule 20, 90 degree pipe

Purchased
Cooler
12V Electrical switch
5.5x2.1mm electrical plug male
Tubing - base on size of exchanger and pump

Notes and tips

Make sure you don’t drill any holes in the inside of the cooler above where the water and ice will go. You will caulk the hole, but they will leak.
The intake fan points in and flows through the exchanger. The outage again flows through the exchanger. It is important to have some rigid insulation above the ice. This keeps the liquid cold longer and eliminates some moisture in the air. There will be condensation that is unavoidable, but the less moisture the better.
I soldered the wires, but you could use solder less connectors or wire nuts.
The exchanger I used was long and thin, so I chose to have one fan facing in and the other out. Both pushing air through he exchanger. Your call.
Holes and manifold rings are for a 3” hole.
When driving the larger holes in the top the structure can be come flimsy. I printed a support to tighten up the top.

When tested the air comes out at about 39 degrees F. 


PETG
240 degrees