What factors determine the heat preservation time of the thermos cup and thermospot?

Editor encountered an embarrassing thing a while ago.Friends all know that Editor is engaged in the water cup industry.During the festival, we will give the water cup and kettle produced by our factory as gifts to our relatives and friends.During the holiday party, my friends talked about the thermos cup I sent.A friend said that the heat preservation time was too long. He was thirsty and could not drink water.Some friends also said that they would grow up for about 7 or 8 hours without heat preservation, but the water in the cup was already warm.A friend jokingly asked me if I would favor one over the other.If you have a good relationship, you can send them with good quality. Are they not very thermal insulation or are they of average relationship?

Although I felt very embarrassed at that time.However, in order to avoid misunderstanding, the national standard requirements for the insulation time of the insulation cup were detailed, and the factors affecting the insulation time of the insulation cup were also discussed. Why is the insulation time of the same cup significantly different? Then the editor will share these contents with you, hoping to help friends judge whether the insulation time of the thermos cup is qualified.

The insulation principle of the insulation cup is to transmit the insulation temperature to the outside through the vacuum state between the double wall clamps, thus playing the role of insulation.I believe many friends know the principle of cooling air falling and heating air rising.Although hot water in the insulated cup cannot conduct heat outward through the cup wall, when the hot gas rises, the heat will conduct heat outward through the cup cover.

Therefore, most of the hot water temperature in the insulation cup is transferred from the cup mouth to the cup cover.

Knowing this, the larger the diameter of the cup mouth, the faster the outward heat conduction of the same capacity cup;For the same type of heat preservation cup, the longer the heat preservation time of the cup with good heat insulation effect will be;The cup lid with similar appearance has a better thermal insulation effect than the cup lid with ordinary flat head screw cap.

In addition to the shape comparison mentioned above, the more important thing is that the effect of vacuum pumping is determined by the welding quality of the water cup.No matter what type of stainless steel heat preservation cup, welding process will be used, and the welding quality will directly affect whether the water cup is heat preservation, heat preservation time, etc.

Generally, argon arc welding and laser welding are the welding processes currently used in the water cup factory.Incomplete welding or serious missing welding will usually be picked out before vacuuming.Those with relatively thin and incomplete solder joints or faulty solder joints will be selected after vacuum process.However, when vacuumizing at the same time and at the same temperature, some water cups will also have different vacuum integrity due to the effect of getters.This is why the insulation time of the same batch of insulation cups is different.

Another reason is that the faulty welding is not obvious, and it was not selected by inspection before it appeared.The position of the solder joint is broken or expanded due to the impact and fall of the consumer during use.This is why the thermal insulation effect of some consumers is still very good when they first use it, but after a period of time, the thermal insulation effect obviously decreases.

In addition to the above reasons, the heat preservation duration of the thermos cup will also be affected by frequent alternating cold and hot water and long-term use of acid drinks.

Dongguan Zhanyi Commodity Technology Co., Ltd. specializes in the production of metal cups, plastic cups, coffee cups, suction mug, lunch boxes, food jar, travel mugs, portable water bottles, sports bottles, home life desktop trash cans, thermos bottles, etc.These products are all our annual exports, and are recognized and loved by the US, Europe, Australia, Japan, South Korea, Taiwan, Hong Kong and other consumers. Support for small quantity order, fast customization.