A refrigerant (the chemical that is used to keep things cold) is turned from a liquid into a gas in the evaporator. This is an endothermic reaction, meaning the refrigerant absorbs the heat around it, making the slush machine cold. ... The constant movement also helps to make sure the slush doesn't freeze solid.

How does a frozen beverage machine work?

How Do Frozen Drink Machines Work? ... These machines do not require ice to be pulverized before creating drinks. Rather, the machines freeze liquid to create tiny ice crystals that make for an extra smooth drink that is difficult to duplicate at home.

How long does a Slurpee machine take to freeze?

Freezing into SLUSH takes about 20 minutes with refrigerated product.