The working principle of the pump head: When the dynami […]
The working principle of the pump head: When the dynamic pressure handle is pressed down manually, the volume in the spring cavity decreases and the pressure increases. The liquid enters the nozzle cavity through the hole of the valve core, and then ejects the liquid outward through the nozzle. At this time, the pressure is released. With the handle, the volume in the spring cavity increases to form a negative pressure. The ball opens under negative pressure. The liquid in the bottle enters the spring cavity. At this time, a certain amount of liquid has been stored in the valve body. When the handle is pressed again, it is stored in the valve. The liquid in the body will be flushed upward and sprayed out through the nozzle;
Judging from the above working principle, the key to a good pump head is to pay special attention to the following places: 1. Glass or steel balls under the spring. The seal here is very important, because the liquid in the spring cavity flushes upward. If the pressure is leaked here, when the pressure handle is pressed, the liquid will leak into the bottle and affect the spray effect of the liquid;
2. It is the sealing ring on the upper end of the valve body. If there is a leak here, when the pressure handle is released, the force of the liquid to be pumped upwards will decrease, resulting in a small amount of liquid stored in the valve body, which will also affect the spray effect;
3. The cooperation between the pressure handle and the valve core. If there is a leak here, there will be a certain resistance when the liquid rushes up to the nozzle, and the liquid will flow back. If it leaks, it will affect the spray effect ;
4. The design of the nozzle, the design of the nozzle is directly related to the spray effect.