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. 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, if the thermos cup is damaged during use, it will become insulated, because air leaks into the vacuum layer and convection is formed in the interlayer, so it cannot achieve the effect of isolating the inside and outside.
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 cup is a water container made of stainless steel and a vacuum layer. It has a cover on the top and is tightly sealed. The vacuum insulation layer can delay the heat dissipation of the water and other liquids 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 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.
Post time: Feb-03-2023