The tank of the hot water bottle is made of two layers of glass, both of which are plated with silver. Like a mirror, it can reflect the heat rays back, thus isolating the heat radiation path. The vacuum between the two glass layers of the thermos bottle destroys the condition of convective conduction. Cork, which is not easy to transfer heat, is used as the cover of hot water bottle to block the path of convective heat transfer. If the three paths of heat transfer are completely blocked, the heat can be kept for a long time. But the heat insulation of the thermos is not so ambitious, and some heat can still run out, so the heat preservation time of the thermos has a certain limit.

The function of a hot water bottle is to maintain the temperature of hot water in the bottle, isolate the heat exchange between the inside and outside of the bottle, so that the "hot" inside the bottle cannot go out and the "cold" outside the bottle cannot come in. If you put a popsicle in a hot water bottle, it's not easy for the "hot" outside to run into the bottle and the popsicle to melt. So it is scientific to call a thermos a thermos because it can keep both heat and cold. The warm water bottle used at home can stick to the temperature of hot water very well. What's the principle?

The cooling of hot water is caused by heat convection, heat conduction and heat radiation. The thermos tank is made to deal with the above three problems. Cork is used at the mouth of the bottle to prevent the convection of heat and cold air; the space between the double-layer bottle is vacuumized to deal with the conduction of heat; a thin layer of silver is coated on the bottle to make it a mirror reflecting light and heat, so that the heat radiation is blocked back by the silver layer. In this way, the heat will not be lost and play a role in heat preservation.

Article source: silicone folding kettle manufacturerhttp://www.jinleidj.com/