The heat preservation principle of household thermos flask and thermos cup is the same, they all use vacuum to cut off heat conduction to ensure the temperature of the liquid in the bottle. Although their heat preservation principle is the same, but their process is not the same, household thermos is double glass material, the use of tail vacuum; The vacuum flask is double-layer stainless steel tailless vacuuming, single from two kinds, tailless vacuuming is higher than the requirement of tail vacuuming, the cost is more expensive.
Household thermos insulation principle: tail vacuuming process
Household thermos bottle liner is also welded together with the inner layer and outer layer, and then pumped in a high temperature vacuum environment, and then pumped with a small hole to plug, with a small tail, in the use of temperature difference slowly cooling, after the formation of a vacuum layer to achieve heat preservation effect. This kind of vacuuming is also called tail vacuuming, which is also a traditional vacuuming process.
Vacuum cup heat preservation principle: tailless vacuum pumping process
Vacuum vacuum cup adopts double layer stainless steel vessels in high temperature “vacuum” environment, by computer control to complete the pumping, sealing welding, cooling process. Sealing welding is the “fusion seal”, which makes the solder high temperature melting and the suction hole sealing welding closed, so it can ensure that the long-term air leakage, after cooling, the use of environmental temperature difference to achieve vacuum effect.
Thermal insulation principle: thermal insulation principle of vacuum partition
The process of temperature transfer is mainly transmitted by three ways, namely, heat conduction: directly contacting objects of different temperatures through the contact surface of heat transfer; Heat convection: By means of the flow of a fluid to conduct heat transfer, fluid can be carried out, there is no fluid in a vacuum, so there is no such way; Thermal radiation: Heat is transmitted by radiation at any time and any place. This method is related to the temperature of the heat source. The higher the temperature, the more heat is transmitted by radiation.
