In addition to keeping warm, the thermos can also keep cold. For example, the inside of the thermos can prevent the exchange of heat inside and outside. If we give it a cold temperature, it can maintain a cold temperature, and if we give it a hot temperature, it can maintain a hot temperature. Its principle is also that the inner and outer walls are vacuumed, and the environment is airless.
There will be no conductors between the air and the thermos cup. It is a constant temperature. In fact, there is some heat conduction, but it is very small. If you want to put some ice cubes in the thermos cup, you must first put the thermos cup on the cup. Put ice in the refrigerator for a while, let the temperature in the thermos cup become low temperature, and then put the ice cubes in, so that the thermos cup will not melt, and the thermos cup cannot be kept for a long time with ice cubes.
The thermal insulation properties of a general thermos cup will last for about three to four hours, and the temperature for keeping cold is also about three to four hours. You can still drink cold water in three hours. If it is a real thermos cup, its normal heat preservation has eight hours, and the cooling effect is actually the same. We can drink cold water when we go shopping. , its cooling effect is also longer, especially suitable for our daily use. If you go out to play, put ice cubes in a thermos cup, so you don’t have to buy some water outside. It’s also very convenient. Whether you want to put hot water in the thermos cup, you can also put cold water, even if you put ice cream in it. It is also possible to maintain a certain temperature so that the ice cream does not melt.
Because its vacuum flask can prevent hot air from entering it, it will not let them melt, and the interior of the vacuum flask is also silver, which reflects the radiated heat back. If there is some cold liquid in it, this kind of thermos can also avoid the heat from outside sticking to the bottle. In fact, it is very cheap to buy a thermos in summer, not only in winter but also in summer. The body of the thermos cup is very small, but it has many functions.
