Suction cup is a very magical adsorption tool, which is often used in organisms and household cleaning appliances. Suction cups in organisms are mainly used for insects, shells, jellyfish, octopus and other animals to survive and prey in water. In household cleaning appliances, suction cups are usually used to absorb dirt and dust such as mattresses, carpets and walls to achieve cleaning effect. Sucker not only has strong adsorption capacity, but also is simple to operate, so it has been widely used in many scenes.

The principle of sucker is to use air pressure difference to generate adsorption force. When the sucker sticks to the object, the air in the sucker is pumped out, and the external air pressure tightly sticks the sucker to the object to form adsorption. In household cleaning appliances, suction cups usually use efficient aspirators to generate negative pressure, thus achieving adsorption. This adsorption force is not only stable and reliable, but also very convenient to use, and it can easily clean all kinds of hard-to-reach corners.

Although sucker has excellent applications in many aspects, it also has some shortcomings. First of all, the sucker can only absorb smooth surfaces, but the adsorption effect on irregular surfaces is poor. Secondly, the adsorption force of the sucker is related to the external air pressure, and the adsorption force will decrease at high altitude or low air pressure. At the same time, the sucker is also easily affected by temperature and humidity, and the adsorption force will show different effects under different conditions. Therefore, attention should be paid to environmental factors when using suction cups to ensure their normal use and service life.