The stainless steel vacuum flask is made of double-layer stainless steel inside and outside. The inner tank and the outer shell are combined by welding technology, and then the air in the sandwich between the inner tank and the outer shell is drawn out by vacuum technology to achieve the effect of vacuum insulation
Stainless steel insulation cups are divided into: ordinary insulation cup (after pouring boiling water in, the holding time is generally less than three hours), vacuum insulation cup (through the vacuum process, the boiling water can be kept for more than 8 hours)
In fact, for vacuum insulated cups, the length of the holding time depends on the structure of the cup body and the thickness of the cup material.
Generally speaking, the thinner the cup material, the longer the holding time. However, the cup body is easy to be damaged and deformed, which affects the service life; measures such as metal film and copper plating on the outer layer of the vacuum cup can also increase the degree of heat preservation; large capacity and small diameter vacuum cups have a longer heat preservation time, on the contrary, small capacity , The large-caliber vacuum insulation cup has a shorter holding time; the service life of the vacuum cup also depends on the cleaning of the inner layer of the cup and the time of vacuuming, and the most important thing is the structure of the vacuum furnace.
The vacuum equipment used in the society for vacuum vacuum flasks includes vacuum exhaust station and vacuum brazing furnace, and there are about two types and four types. One type has a tail vacuum exhaust desktop type; the other type has a brazing furnace type. The brazing furnace type is divided into: single chamber, multi-chamber, and increased pumping speed multi-chamber.
Single furnace type overall vacuum brazing furnace. The vacuuming cycle of this furnace is long. If the manufacturer wants to improve production efficiency and shorten the vacuuming time, it will affect the service life of the cup. The service life of the cup is only about 8 years. Vacuum cup exhaust station with tail and its advantages: The vacuum cup produced by the vacuum exhaust station with tail exhaust, the heating temperature is about 500 ℃ when vacuuming, the shell of the vacuum cup is not easy to deform, but the copper pipe welding place is easy to touch Leakage should be specially protected during the processing of semi-finished products.
Another big category is the vacuum brazing furnace type, which is roughly divided into three types. Unexpectedly, although the vacuum insulation cup we usually use is no different from the general insulation cup in appearance, the vacuum insulation cup is Generally, the thermos cup is much more complicated and the technical difficulty is much higher. Therefore, the price of vacuum insulated cups is at least twice higher than that of general insulated cups.