What is the working principle of the model air pump? What's the use of all kinds of accessories

Air pumps are divided into diaphragm piston turbine type and so on. The pump output of grinding pump and piston is higher than atmospheric pressure, and their principle is actually the same as that of continuous output of air by pump. One disadvantage of this pump is that it will generate heat, which comes from the heat generated by compressed air and the heat generated by piston friction. At this time, the cold and humid air will condense into water and be blown out, so an oil-water separator is needed to prevent water from entering the pneumatic equipment. Turbine pumps are mostly tortoise pumps. Its air pressure is constant and small, so it won't produce water. Compared with piston pump, if the pressure is too low, the spray paint particles will be larger. It is generally not recommended to buy a turtle pump.

The pen consists of a pen body, a nozzle and a needle. The principle and simplicity of the pen is that when the air flows rapidly, a low pressure will be formed around it, and the paint in the pen will be sucked out of the nozzle. Pen spray is divided into double-acting single-acting upper pot, lower pot and side pot.

Double-acting pen can control the amount of pigment by moving the gap between the needle and the nozzle to show different effects.

Single-acting pen spray needle is relatively fixed, suitable for large-area spraying.

The fountain pen on the pot is easy to clean and suitable for detailed painting.

Although it is troublesome to clean the fountain pen under the pot, this fountain pen can be replaced by replacing the pot. Unlike the pen on the pot, it needs to be thoroughly cleaned before the paint can be changed.