According to the Zhongguancun Online query that the frozen milk to be frozen in the refrigerator for about 3 to 4 hours can be frozen. Frozen into a smoothie this depends on the thickness of the milk, generally with food-grade preservation box, milk thickness of 1cm frozen on 30 to 80 minutes can become a smoothie.

The refrigerator is to maintain a constant low temperature of a refrigeration equipment, but also a food or other items to maintain a constant low temperature state of civilian products.