Freeze Ray

thingiverse

This design is a device that uses the thermodynamic properties of pressurized difluoroethane (in Dust-Off cans) to make a wrist-mounted liquid difluoroethane sprayer. The basic idea is that, due to the rapid decrease in pressure, temperature must also drop. This is why a can of Dust-Off feels cold after prolonged use. By holding the can upside down, liquid difluoroethane (and some other cold gasses) are released. The whole thing (including the moving arm) can be printed as ONE PART, even on an FDM printer, due to custom designed tolerance. Ergonomic: Made to fit my forearm snugly. However, because it is custom designed, it might not fit everyone perfectly. Completed four iterations of the design in order to achieve my own satisfaction. https://www.youtube.com/watch?v=-su83BIn71E