{"id":3378,"date":"2023-05-08T13:08:00","date_gmt":"2023-05-08T04:08:00","guid":{"rendered":"https:\/\/agus.co.jp\/en\/?p=3378"},"modified":"2023-05-08T13:08:39","modified_gmt":"2023-05-08T04:08:39","slug":"portable-vacuum-how-does-thermos-bottle-can-keep-the-heat-this-time-let-us-talk-about-it-more-clearly","status":"publish","type":"post","link":"https:\/\/agus.co.jp\/en\/?p=3378","title":{"rendered":"Portable \u201cVacuum\u201d. How does thermos bottle can keep the heat? This time let us talk about it more clearly."},"content":{"rendered":"\n
\"Portable<\/figure>\n\n\n\n

Many people carry a vacuum bottle with them not only for the hiking but when they go out for a short time or at work in. <\/p>\n\n\n\n

Thermos bottles are very convenient because they allow you to carry warm drinks while they are still warm, but did you know that this is thanks to the ‘vacuum’?<\/p>\n\n\n\n

This section provides an easy-to-understand explanation for the mechanism of vacuum bottle.<\/p>\n\n\n\n

<\/div>\n\n\n\n

To begin with, why do warm drinks get cold?<\/h2>\n\n\n\n

Both hot miso soup and ramen noodles will cool down over time. This is because heat escapes.<\/p>\n\n\n\n

When warm and cold items are attached to each other, the heat from the warm item is transferred to the cold item.<\/p>\n\n\n\n

As a result, warm and cold items turn out to be of the same temperature.<\/p>\n\n\n\n

The heat originally carried by the warm item is transferred to the cold item, resulting in a decrease in the temperature of the warm item.<\/p>\n\n\n\n

So, if warm and cold items are not attached to each other, can heat be transferred?<\/p>\n\n\n\n

As it turns out, this is not true. Heat can be transferred even without such attachment.<\/p>\n\n\n\n

This is because heat is transferred through the air between warm and cold items by electromagnetic waves (light) called ‘infrared radiation’.<\/p>\n\n\n\n

More details for types of light.<\/a><\/p>\n\n\n\n

We keep warm in front of the stove without being directly attached to it because the stove emits infrared radiation.<\/p>\n\n\n\n

<\/div>\n\n\n\n

Why does the ‘vacuum’ hidden in a thermos bottle keeps the heat in?<\/h2>\n\n\n\n

Thermos bottles have a double-layer construction, with a vacuum between the inner and outer walls. The vacuum here makes it difficult for heat to be transferred.<\/p>\n\n\n\n

In the presence of air, heat escapes as infrared radiation. This is because there are many molecules in the air, which transfer heat as energy.<\/p>\n\n\n\n

The molecules transfer heat to each other as if they were waving hand in hand.<\/p>\n\n\n\n

On the other hand, in a vacuum, there are fewer molecules present, which makes it more difficult for them to join hands and thus heat is less likely to be transferred.<\/p>\n\n\n\n

Vacuum tumblers that utilize this thermos technology to drink beer and other cold beverages are also often seen in these days.<\/p>\n\n\n\n

Vacuum is used to make our lives more comfortable, for example in vacuum bottles.<\/p>\n\n\n\n

Our sputtering equipment, which utilizes such a vacuum, can produce films on a wide range of materials and is used in research and other fields.<\/p>\n\n\n\n

For more information on our sputtering equipment, Click here<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"

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