Bottled joy：What is the principle of ice preservation cup

Since the thermos bottle of 1l sports bottle is mainly used for hot water insulation in the family, it is also called a thermos bottle. The structure of the thermos is not complicated. In the middle is a double-layer glass bottle. The two layers are evacuated in a vacuum state and plated with silver or aluminum. The vacuum state can avoid heat convection. The glass itself is a poor conductor of heat, and the silver-plated glass can radiate the inside of the container. The heat is reflected back. Conversely, if the cold liquid is stored in the bottle, the bottle can prevent the external heat from radiating into the bottle.

The cork of a thermos is usually made of cork or plastic, and these two materials are not easy to conduct heat. The outer shell of the thermos is made of bamboo, plastic, iron, aluminum, stainless steel, and other materials. There is a rubber gasket on the mouth of the thermos and a bowl-shaped rubber pedestal at the bottom of the bottle. These are used to fix the glass bulb to prevent collision with the outer shell.

The worst part of the thermos flask's heat preservation and cold preservation function is around the bottleneck, where most of the heat circulates by means of conduction. Therefore, the bottleneck is always as short as possible during manufacturing. The larger the capacity and the smaller the mouth of the thermos, the better the heat preservation effect. Under normal circumstances, the cold drink in the bottle can be kept at 4 within 12 hours. C around. Boiling water at 60. C around.

What is the principle of a vacuum flask?

There are three ways of heat transmission: radiation, convection, and transmission. The silver cup inside the thermos can reflect the radiation of hot water, the vacuum of the cup and the cup body can block the heat transfer, and the bottle that is not easy to transfer heat can prevent the heat convection. The thermos flask also applies the principle of magnetized water, which is to add magnets to the bottom and cap of the bottle to make the water magnetized.

1. The closed structure of the cup body

The cup body of the thermos cup adopts a double-layer structure, and the vacuum of the cup bladder and the cup body can block the heat transfer. Moreover, whether the sealing performance of the thermos cup is good also plays a very important role in the insulation effect. The better the sealing, the more difficult it is to transfer heat, which makes the heat preservation effect better.

2. Double-layer stainless steel vacuum structure

The vacuum does not transfer heat, which is equivalent to cutting off the heat transfer medium. The higher the vacuum degree, the better the heat preservation effect. The vacuum technology is divided into two types: tail vacuum and tailless vacuum. Now most vacuum cup manufacturers use tailless vacuums because this technology is more advanced.

3. The inner tank is plated with copper or silver

The inner tank is plated with copper or silver, which can effectively form a layer of heat insulation net in the inner tank of the thermos cup, so that the copper plating can reflect heat radiation and effectively reduce the heat loss through radiation.