How to choose a thermos flask?

Everyone is very familiar with the vacuum flask, so how to choose the vacuum flask? Today we will talk about this topic.

1. Classification and identification of vacuum flasks.

2. How to choose stainless steel liner and glass liner?

3. Can I hold ice water in the vacuum flasks?

4. Let me talk about the parameters and indicators of choosing a vacuum flask.

1. Classification and identification of vacuum flasks.

If divided according to the material, the vacuum flask can generally be divided into two categories: glass vacuum liner and stainless steel liner.

Products that use glass vacuum liners generally include: thermos, insulated lunch boxes and insulated pots with glass liners, etc.

The stainless steel vacuum liner is mostly used in stainless steel vacuum flasks. Let me talk about the identification method for the vacuum flask.

1. Recognition of heat preservation performance: Generally, pour boiling water into the heat preservation pot. If the temperature can be felt outside the pot body after a few minutes (2-3 minutes), then it can be judged that the product has lost its vacuum. There will be a good insulation effect.

For the identification of the sealing performance of the pot body, this method can also be used.

2. The size of the capacity. The height of the current vacuum flask products is basically the same as the outer shell, but sometimes there will be a certain difference. According to the relevant standards, the difference is between 16-18 mm, which is acceptable or some Friends believe that the heavier the pot body, the better the product quality, which is unscientific.

3. How to identify plastic materials. Generally speaking, even plastic materials are mostly food grade. The characteristics of this kind of plastic are small smell, smooth and shiny surface, and a long service life, while ordinary plastics are just the opposite. More seriously, If the non-food grade plastic material is long-term, it will affect the health of the body.

4. How to identify stainless steel material. In daily life, we can see different types of stainless steel, but if it is to say that it is food grade stainless steel, it must meet certain standards, and certain requirements for the content of chromium and nickel.

That is 18/8, which means it should contain 18% chromium and 8% nickel. Only in this way can it meet the requirements of food-grade stainless steel.

 In addition, you can also pay attention to whether there is any indication of the production address, specification parameters, etc. of the product.

2. How to choose stainless steel liner and glass liner?

At present, most of the vacuum flasks on the market are made of 304 food grade stainless steel, which can also be regarded as the mainstream material. The characteristics of 304 food grade stainless steel are that it is strong and not easily damaged, and has a long service life.

However, the stainless steel inner pot is not suitable for all ingredients. For example, some orange juice acidic beverages are not suitable, because these acidic beverages will damage the stainless steel pot wall to a certain extent, and will leave a certain amount Smell.

If you compare from this point, the glass inner wall is more suitable, which can hold a variety of beverages, and is easier to clean. The disadvantage is that it is easy to break and is not suitable for friends with children at home.

3. Can I hold ice water in the heat preservation pot?

Of course, it can be stored, and it will not affect the performance of the vacuum flask.

Everyone knows that vacuum flasks can not only keep heat, but also keep cold. Their heat preservation principle is the same. They all use the vacuum of the pot wall to prevent the heat transfer from inside and outside.

It can be said with certainty that as long as the vacuum layer of the pot wall is not damaged, the heat preservation performance of the thermos will not be affected.

Fourth, let's talk about the parameters and indicators of choosing a vacuum flask.

Simply put, we can judge from the following three aspects:

1. Thermal insulation performance. This has already been mentioned in the previous article. The key word "vacuum" is the key word for heat preservation performance. One is the vacuum extraction technology, and the other is the vacuum extraction degree. There is still a certain technical content in it. When the vacuum is drawn, it also involves environmental impact (sometimes it affects the strength of stainless steel). How can the product be insulated for a long time? Not all brands have such good technology. .

For example, WUJO thermal vacuum flask can maintain the strength of stainless steel and use its own technology to achieve a high degree of vacuum.

2. Convenience in actual use. In fact, as long as the friends who have used the heat preservation pot, they can tell a little about their own experience, such as the flow of water when pouring water, whether the opening and closing of the lid is convenient and easy to use, whether the handle is smooth (whether it has a curvature, whether it is thick), etc.

3. Appearance modeling. Different people like different styles. What you like is the best for you.