What happened to the thermos? The only answer is that the vacuum layer of the thermos is no longer vacuum, so it’s no heat preservation. Can you repair a thermos without heat? The only answer is that it can’t be fixed. Many friends are not very busy with this answer. In fact, it is very easy to understand as long as you understand the structure of the thermos cup and the principle of thermos cup insulation. Next, we will look at why the thermos cup can keep heat.
Thermos cup structure: the structure here mainly refers to the cup body, which is composed of the inner bladder, the outer shell and the bottom of the cup after welding. Then, the air in the interlayer between the inner bladder and the cup body is pumped out through vacuuming, and the cup body is finally suitable.
Thermos cup heat preservation principle: to understand its principle, we should know that heat transmission has three ways: radiation, convection and transmission. Thermal insulation is to block the three thermal transmission modes, the silver inside the cup can reflect the radiation of hot water, the vacuum of the cup bladder and the cup body can block the transfer of heat, so the cup can play a good thermal insulation effect, hot water can keep warm, cold water can keep cold.
Life tips:
Avoid collision and impact during the use of the thermos cup, so as not to damage the cup body or plastic, resulting in thermal insulation failure or water leakage. Tighten the screw plug with proper force and do not rotate it too hard to avoid the failure of the screw. When drinking coffee, tea or drinks regularly, the bladder will change color. It is normal to use toothpaste and toothbrush.
