The thermos cup has good heat preservation performance and can keep heat for a long time. However, in daily life, some people often encounter the phenomenon that the thermos cup does not keep warm suddenly. So what is the reason why the thermos cup does not keep warm?
1. What is the reason why the thermos cup is not insulated?
The life of the thermos cup is relatively long, reaching 3 to 5 years. However, the thermos cup needs to last for three to five years. The premise is that you must know how to maintain the thermos cup, otherwise the best thermos cup will not be able to withstand such manipulations.
1. Heavy impact or fall, etc.
After the thermos cup is hit hard, there may be a rupture between the outer shell and the vacuum layer. After the rupture, air enters the interlayer, so the thermal insulation performance of the thermos cup is destroyed. This is normal, no matter what kind of cups, their principle is the same, that is to use double-layer stainless steel to draw out the middle air to achieve a certain degree of vacuum. Make the heat of the water inside pass out as slowly as possible.
This process is related to the process and the degree of vacuum pumped. The quality of the workmanship determines the length of time for your insulation to deteriorate. In addition, your thermos cup will become insulated if it is heavily damaged or scratched during use, because air leaks into the vacuum layer and convection is formed in the interlayer, so it will not be able to achieve the effect of isolating the inside and outside. .
Tips: Avoid collision and impact during use, so as not to damage the cup body or plastic, resulting in insulation failure or water leakage. Use appropriate force when tightening the screw plug, and do not over-rotate to avoid failure of the screw buckle.
2. Poor sealing
Check if there is a gap in the cap or other places. If the cap is not tightly closed, the water in your thermos cup will not be warm soon. The common vacuum cups on the market are generally made of stainless steel and a vacuum layer to hold water. There is a cover on the top, which is tightly sealed. The vacuum insulation layer can delay the heat dissipation of the water and other liquids contained inside to achieve the purpose of heat preservation. The falling off of the sealing cushion and the lid not being tightly closed will make the sealing performance poor, thus affecting the thermal insulation performance.
3. The cup leaks
It is also possible that there is a problem with the material of the cup itself. Some thermos cups have defects in the process. There may be holes the size of pinholes on the inner tank, which accelerates the heat transfer between the two layers of the cup wall, so the heat is quickly lost.
4. The interlayer of the thermos cup is filled with sand
Some merchants use inferior means to make thermos cups. Such thermos cups are still insulated when they are bought, but after a long time, the sand may react with the inner tank, causing the thermos cups to rust, and the heat preservation effect is very poor. .
5. Not a real thermos cup
A mug with no buzz in the interlayer is not a thermos mug. Put the thermos cup on the ear, and there is no buzzing sound in the thermos cup, which means that the cup is not a thermos cup at all, and such a cup must not be insulated.
2. How to repair the insulation cup if it is not insulated
If other reasons are excluded, the reason why the thermos cup does not keep warm is because the vacuum degree cannot be reached. At present, there is no good way to repair it on the market, so the thermos cup can only be used as an ordinary teacup if it does not keep warm. This cup can still be used. Although the heat preservation time is not ideal, it is still a good cup. If it has special meaning to you, you can keep it for use. In fact, the heat preservation time is relatively short, but it is still in good condition. This is also a low-carbon life healthy life.
Therefore, it is especially reminded that when using cups and pots, they should be kept. Especially products such as ceramic cups, glasses, and purple clay pots, let alone repairs, if they are broken, they cannot be used.
3. How to detect the insulation effect of the thermos cup
If you want to test whether the thermos cup you are using has a good heat preservation effect, you may wish to do the following experiment: pour hot water into the thermos cup, if the outer layer of the cup can feel hot, it means that the thermos cup no longer has the function of heat preservation.
Also, when purchasing, you can open the thermos cup and put it close to your ears. The thermos cup generally has a buzzing sound, and the cup with no buzzing sound in the interlayer is not a thermos cup. Put the thermos cup on the ear, and there is no buzzing sound in the thermos cup, which means that the cup is not a thermos cup at all, and such a cup must not be insulated.
4. How to prolong the service life of the thermos cup
1. Avoid dropping, colliding or strong impact (avoid vacuum failure caused by outer metal damage and prevent coating from falling off).
2. Do not lose the switch, cup cover, gasket and other accessories during use, and do not sterilize the cup head at high temperature to avoid deformation (avoid affecting the sealing effect).
3. Do not add dry ice, carbonated beverages and other liquids that are prone to high pressure. Do not add soy sauce, soup and other salty liquids to avoid corrosion of the cup body. After filling milk and other perishable beverages, please drink and clean them as soon as possible to avoid deterioration Then corrode the liner.
4. When cleaning, please use neutral detergent and wash with warm water. Do not use strong cleaning agents such as alkaline bleach and chemical reagents.
Post time: Feb-04-2023