Can't a warm water bottle hold cold water
Vacuum flask is mainly used for hot water heat preservation in the family, so it is also called hot water bottle. The structure of the vacuum flask is not complicated. In the middle for the double deck glass inside, between the two layers into vacuum state, and silver plated or aluminum, vacuum can avoid heat convection, glass itself is a poor conductor of heat, silver plated glass containers can be internal to the external radiation heat reflection back. On the other hand, if stored cold liquid bottle, the bottle and can prevent the outside heat radiation in the bottle. Thermos bottle stopper, cork is often used to or plastic, these two kinds of materials are not easy heat conduction. Vacuum flask shell with bamboo, plastic, iron, aluminum, stainless steel and other materials, thermos bottle has a rubber gasket, bottle has a bowl shaped rubber mat, these are all for the sake of fixed glass with bravery, in case of collisions with the shell. Insulation, cold insulation function of the vacuum flask is the worst place around the bottleneck, more calories in it with the help of the conduction mode of circulation. Therefore, when manufacturing is always possible to shorten the bottleneck, the greater the capacity and the smaller the thermos bottle, the heat preservation effect better, under normal circumstances, can make the bottle within 12 hours of cold drink to keep at 4. C. Boiled water at 60 C or so. So the thermos is still warm.
Thermos containers that can hold water, this is called vacuum flask, but few such use Good heat preservation effect can let the water has been under cold water, in the summer
Heat preservation is not only protect the hot water, protect the installs when the temperature is, what is mean in temperature of the water, he can't maintain the temperature drop too fast.
