0 1 The inner container of thermos bottle is made of double-layer glass, and both layers of glass are plated with silver, which can reflect heat rays back like a mirror and cut off the path of heat radiation. Vacuum pumping between two layers of glass in thermos bottle destroys the condition of convection conduction. The thermos bottle cover is made of cork, which is not easy to transfer heat, blocking the channel of convective heat transfer and perfectly blocking the three paths of heat transfer, so that the heat can be preserved for a long time.

Hot water bottles can keep the temperature of water for a long time, which is convenient for people's daily life. But for many people, the principles of some products of thermos bottles are often unfamiliar, and they are also interested in the thermal insulation principles of these thermos bottles. So why do thermos bottles keep warm?

There are three ways of heat transfer: radiation, convection and conduction. People will feel warm under the sunshine, because the heat of the sun hits us, which is called thermal radiation. The best way to prevent thermal radiation is to block it back, and the best material to reflect heat is a mirror. Pour a cup of boiling water on the table, because the temperature of the water in the cup is the same as that of the surrounding environment, which is thermal convection. If you put a lid on the cup, it will hinder the path of convection. But this glass of water will still be cold, just for a longer time. This is because the cup has the property of heat transfer, which is called heat conduction.

The inner container of thermos bottle is double-layer glass, and both layers of glass are silver-plated, which can reflect heat rays back like a mirror, thus cutting off the path of heat radiation. Vacuum pumping between two layers of glass in thermos bottle destroys the condition of convection conduction. The thermos bottle cover is made of cork, which is not easy to transfer heat, blocking the channel of convective heat transfer and perfectly blocking the three paths of heat transfer, so that the heat can be preserved for a long time. However, the insulation effect of thermos is not so ideal, and some heat can still escape, so the insulation time of thermos is limited.

The function of hot water bottle is to keep the temperature of hot water in the bottle, cut off the heat exchange inside and outside the bottle, and make the inside of the bottle? Is it hot? Can't get out, outside the bottle? Cold? Can't get in. If you put the popsicle in a thermos, what about outside? Is it hot? It is not easy to touch the bottle, and the popsicle is not easy to melt. So it is scientific to call the thermos bottle a thermos bottle, because it can not only protect? Is it hot? , still can guarantee? Cold? .