Why can hear buzzing within the thermos is good thermos
Heat conduction has three ways: heat transfer, radiation and convection. Open bottle is double deck glass, middle vacuum, prevent the generation of heat transfer, thermos isolate air and prevent the formation of convection, warm inside silver, prevent the formation of the thermal radiation. So the thermos bottle can heat preservation. Can hear buzzing can also be used, in fact you hear the sound is the sound of the air convection, illustrate convection of air inside the bottle or bottle, by instead of passing out from other place, so that the vacuum interlayer still intact, so you can continue to heat preservation!
I had a baidu I can't see related information It analyzed the bold itself 1 buzz from which come of Guess 1 conch button to ears to hear that you've heard the sound of the sea It is heard in his ears The structure of the blood flow to the sound of the thermos of vacuum should be better able to enlarge the effect. Guess you know such a phenomenon Under the tip on the width of the underground space If a person is whispering in the bottom of the earth's surface to hear loud and clear Some ancient prison is using this phenomenon to monitor the underground of prisoners in prison Thermos mouth is easy to have a sound air flow will vibrate And thermos just like I'm in the phenomenon of underground space in the small voice of the structure of the amplification process became the hum of the ears can distinguish. 2 if the thermos is broken Also is the emergence of cracks So what is the impact of its? Didn't see it To be honest I am doubt that your mother Can you put the hand over ears hear buzzing But this can explain the fit of the fingers anastomosis yao...
Inside the thermos is pumped into vacuum, striking the air molecules on the thermos of external noise. If can't thermos of internal clean, thermos don't heat preservation
How to choose the thermos Thermos is also called the thermos or vacuum flask, is an essential part of every household utensils for daily use, however, often listen to people, oneself buy thermos no heat preservation, insulation or time is too short. So, pay attention to when buying the right selection method is very important. 1, look at the bottom of the inside side of tail gas is complete. If the tail gas breakdown or was knocked off, belong to the damaged goods, because inside is two layers of glass, no air, tail gas damage that has been in the air, no heat preservation effect. 2, a finger gently knock inside place of glass, if the sound is ringing, good inside is no crack. 3, check whether the silver plating is uniform, because silver plated to avoid the thermal radiation, prevent heat loss. 4, to see if the thermos bottle mouth round, inserting the cork is tight or leak. People usually choose listening thermos, this is unscientific. An outer glass broken inside, the inner glass bravery also issued a "buzzing" sound, it is of the bile in the convection of air inside the sound.
