With the gradual improvement of people's living conditions, the use of many household items has become more and more convenient, including the application of lotion pumps. An emulsion pump, also known as a push-type emulsion pump, is a liquid dispensing tool that uses the principle of an atmospheric pressure balance to make the emulsion in the bottle pop out by pressing and can also add the outside atmosphere to the bottle. Next, I will talk about the working principle of the emulsion pump and its important functions and parameters.

　　When buying a product containing a lotion pump, you should know that during the pressing process, you need to connect its head through it and drive the piston to use it under the action of a compression spring. In the process of compressing the spring, the outer wall of the lotion pump piston often fully opens the piston through the friction of the inner cavity wall, and the liquid appears in the discharge hole of the piston head. As the piston moves down, the air inside will be expelled from the piston head.

　　We can completely exhaust the air in the inner cavity by pressing multiple times, then pressing the head by hand, and then exhaust the air in the inner cavity through the action of the piston rod and the compression spring. At this time, loosen the pressure head of the emulsion pump by hand, and the spring will lose pressure and move down again. At this point, the piston moves downward by rubbing the inner wall to close the discharge hole. At this time, the internal liquid storage gun will be in the pump head of the hollow emulsion pump and absorb the liquid many times, which can store the liquid in the cylinder until there is no gap. At this time, just press the head of the emulsion pump again, and the liquid can be sprayed directly from the mouth through the discharge port, which is the working principle of the emulsion pump.

　　As we all know, the pump output of the emulsion pump is often a very important parameter, which is related to the error and tightness of each component of the emulsion pump. Generally speaking, the number of times of air compression and the volume of compressed liquid are both important parameters for user experience, and also a very important criterion for manufacturers to test lotion pumps in the production process. I hope that through this article, you can have a basic understanding of the working principle of the emulsion pump.