Different from the ordinary thermos cup, the 55-degree cup adopts special technology and uses the principle of physical cooling:
(first cup)
Pour boiling water at 100℃ into the cup, tighten the lid, shake it up and down for about 1 min, and then unscrew the lid. The original boiling water in the cup can be quickly cooled into warm water for drinking, and it can also be kept warm for about 3 hours.
When the first cup of boiled water is finished,
(second cup)
You can also pour cold water into the cup, tighten the lid, shake it up and down for about 1 minute, and then unscrew the lid. The originally cold water in the cup will soon become warm water that can be drunk immediately.
After drinking the first cup of boiled water, if you inject boiled water at 100℃ again, it will take about an hour to cool down, so as not to burn your mouth.
Extended data:
Tap water as a heat storage material was poured into the interlayer of stainless steel cup wall and tested by temperature sensor to make a 55-degree cup. The test results show that boiling water can be quickly cooled to about 55 degrees in one minute, and cold water can be quickly heated to about 30 degrees after being poured into a cup. This temperature rise and fall curve is basically consistent with the official temperature rise data of the 55-degree cup. This process is actually the simplest heat conduction principle in our physical knowledge.
The hot water meets the stainless steel cup wall with good thermal conductivity, and the cup wall conducts the temperature to the normal temperature water with lower temperature. After a certain time, the temperature on both sides of the cup wall is balanced, just around 55 degrees. The same is true of the water in the cup. The temperature of interlayer liquid is about 55 degrees, which is conducted to cold water through the cup wall, and then the cold water is heated to about 30 degrees.
References:
Baidu encyclopedia -55 degrees
Phoenix. com-CCTV investigates the truth of 55-degree cup: aluminum alloy with salt water is called high-tech