Vacuum cups are generally made of ceramic or stainless steel plus a vacuum layer to hold water. The top has a lid and is tightly sealed. The vacuum insulation layer can delay the heat dissipation of the water and other liquids contained in it, so as to achieve thermal insulation. Purpose.
The thermos cup is developed from the thermos bottle. The principle of insulation is the same as that of the thermos bottle, but people make the bottle into a cup for convenience.
Source of development
There are three ways of heat transmission: radiation, convection and conduction. [1] The silver cup in the thermos cup can reflect the radiation of hot water, the vacuum of the cup and the cup body can block the transfer of heat, and the bottle that is not easy to transfer heat can prevent heat convection. Thermos.
