In 1892, a Scottish James Duvall, an Oxford University invented a vacuum insulation cup. At that time, he was carrying out a study of gas liquefaction. The gas should be liquefied at low temperatures, and it is necessary to design a container that can isolate the gas and external temperature, so he invites the glass craftsman Berg to customize a double-layer glass container. The inner wall is applied to the inner wall, then the air between the bottle gap is extracted, and the thermal water or ice water in the thermal insulation cup maintains the original temperature due to the characteristics of the vacuum.
At the beginning of the insulation cup, it was called "Du Bao", which was used in the opening of scientific research and physicochemical experiment. Later, the glass craftsman found this bottle to put some hot coffee, hot tea can be enjoyed for a long time, so it is very convenient, so I applied for patents, started Enter the market. In the 1950s, the sales volume of the Insulation Cup reached the most peak, European and American family picnic hiking, the field camping will carry a thermal cup, and this period of insulation cup began to enter the Chinese market.
How to choose a thermos cup
1. Select according to material
The material in the current market is mainly: stainless steel insulation cup, glass insulation cup, purple sand insulation cup, ceramic insulation cup, plastic warm cup, the best effect is a stainless steel vacuum thermal cup, stainless steel quality can Two-layer cup walls are as thin as much as possible and compress the thickness of the vacuum layer as much as possible, so that the cups have more available capacity, and the effect is better.
2. Observe the height of the base
The base is high, and it is a tail vacuum technology. The degree of vacuum is not high, the time is long, and the insulation effect will greatly decrease.
The base is low, indicating that there is no tail vacuum technology; the air between the liner and the outer air is used through professional equipment, the vacuum is high, the cup is very good, and the base is very thin under the same conditions.
3. Check the small thickness of the vacuum
Buying a cup, you can press a finger to press the cup body, if you can feel that the outer layer is in contact with the liner, then the cup wall thickness is very good, the vacuum layer is also manufactured with a thin lightweight cup process, the same volume, This cup has a larger capacity, and the heat preservation is better.
4. Listen to the cup echo frequency
Because the better the thermal insulation cup, the higher the vacuum of the intermediate interlayer, the more difficult energy consumption in the insulation cup is more difficult, and can only be absorbed by the inner wall. Since the inner wall is too thin, the sound of the absorption produced is very slow, and the more slowly add the number of times, so the more you can hear the buzz.
5. Watch the temperature change of hot water
The simplest and straightforward method is to let go of water, wait a few hours, feel that the outer wall of the insulation cup is warm, a good thermal insulation cup should have no warmth of the outer wall, because the vacuum layer is good, heat is not complete Pass to the outer circumference of the cup, and open the cup and see a lot of water vapor.
Insulation cups use tips
1. Insulation cups should not store some drinks
Acid plum soup, lemon juice and other acid drinks are easy to corrode the cup wall; Coke, Sprite and other carbonated drinks will react with stainless steel; hot milk is placed in the insulation cup. It is easy to breed a large amount of microbial acceleration. Chinese medicine also remembers not to put it in the thermal cup, the Chinese medicine can save one or two days at room temperature, and the warm cup is shortened.
2. Remember to wash in time after use
There are many hygienic dead corners, such as lines, bottle caps, etc., if it is not cleaned or improper use, it will lead to a large amount of soil. The temperature in the thermal cup is suitable, environmental moist, easy to get various bacteria. In addition, many people have the habit of carrying the thermal cup, the cup body is frequent with various items, and the surface is more worrying. Timely cleaning, in order to keep the cup, longevity, is also for our own health.