As people's living standards gradually improve, many household products have become increasingly convenient, including emulsion pumps. An emulsion pump, also known as a push-type emulsion pump, is a dispensing tool that utilizes the principle of atmospheric pressure balance to eject emulsion from a bottle by pressing and can also add external atmosphere to the bottle. Next, I will discuss the working principle, important functions, and parameters of emulsion pumps.
When purchasing products containing an emulsion pump, it's important to know that during the pressing process, the pump head is connected to the pump, and the piston is driven by a compression spring. During the compression of the spring, the outer wall of the emulsion pump piston often opens fully due to friction between the inner wall and the outer wall, and the liquid appears in the discharge hole of the piston head. When the piston moves downward, the internal air is expelled from the piston head.
We can completely expel the air from the inner cavity by pressing repeatedly, then press the head by hand, and the air in the inner cavity is expelled again by the action of the piston rod and the compression spring. At this point, releasing the pump head by hand will cause the spring to lose its pressure and move downward again. At this point, the piston moves downwards by rubbing against the inner wall to close the discharge port.