When you have a thermal insulation cup, its quality, capacity and what not, has become a foregone conclusion, want to improve the thermal insulation effect of the thermal insulation cup, can only start from the use of methods, from the details! First of all, we have to understand a scientific concept: a good conductor of heat, can accelerate the dissipation of heat from the object, a poor conductor of heat, can slow down the dissipation of heat from the object. Stainless steel metal is a good conductor of heat, fast heat absorption, fast heat dissipation, plastics, glass, ceramics and other materials is a poor conductor of heat, air is also a poor conductor of heat, said also in the perhaps you want to ask me why insulation cups have to be made of stainless steel, and to be vacuumed? The use of stainless steel material is mainly the characteristics of the material decided, such as safety, compression resistance and other factors to consider, it is because the air is a poor conductor of heat, so it is necessary to remove the excess air, so that heat conduction is slower! Heat transfer has three ways: convection, conduction, radiation, so even in a vacuum environment, heat can also be transferred, just slowed down, such as the sun's heat transfer to the earth above. Thermos vacuum can only play the role of trying to block the role of heat conduction, but the fact that heat conduction still occurs, when the temperature of the water inside the thermos is higher than the outside world temperature, you can slow down the decline in the temperature of the water inside the cup when the temperature of the water inside the thermos is lower than the outside world temperature, you can slow down the temperature of the water inside the cup of the speed of increase.
Understand these reasons, we use insulation cup how to extend the insulation effect? First of all, we loaded with boiled water or ice water, you can first load a little into the preheating or pre-cooling, and then pour it out and then loaded with boiled water or ice water (because the inner layer of the material will quickly absorb heat and reach a critical state), but don't fill the entire inner liner, to leave a portion of the gap (the air is a poor conductor of heat), so that the water and the lid does not come into contact with the air due to the slow thermal conductivity of the air, the stopper insulates the mouth of the bottle of the convective The air thermal conductivity is slow, the bottle stopper to isolate the mouth of the bottle convective heat transfer, the water temperature drops slowly, and because there is air, the beginning of the bottle because of thermal expansion discharged a large amount of air, and then the temperature inside the bottle to make the bottle lower atmospheric pressure than outside the bottle, more conducive to heat preservation.
