Freeze Ray

thingiverse

This handheld device leverages the thermodynamic properties of pressurized difluoroethane from Dust-Off cans to create a wrist-mounted liquid diffluoromethane sprayer. The concept hinges on the rapid drop in pressure, which necessitates a corresponding decrease in temperature. This phenomenon is why a can of Dust-Off feels cold after extended use. By holding the can upside down, liquid difluoroethane and other chilled gases are released. The entire assembly, including the moving arm, can be printed as one single part on an FDM printer due to custom-designed tolerances. Ergonomically crafted to fit snugly against the forearm, this design may not perfectly accommodate everyone's anatomy due to its customized nature. However, four iterations of refinement were undertaken to achieve personal satisfaction with the final product. Watch a demonstration of the device in action at https://www.youtube.com/watch?v=-su83BIn71E.