In the same fluid, the flow velocity is high and the pressure is low; the flow velocity is small and the pressure is high. Fluid will flow from high pressure to low pressure.

　　The perfume pump itself has a mechanical structure that allows the liquid to be compressed to generate high pressure. When the liquid passes through the perfume nozzle, the low-speed flowing water is compressed and released suddenly through the micropores of the small nozzle (the principle is similar to that of a bomb explosion), and a relatively high-speed movement occurs between the air and the water, and the water is torn into small droplets due to the high-speed flow. a small drop. When these small water droplets are sprayed out, they become fog.

　　Some friends are worried that the perfume will evaporate soon after leaving it on, but in fact, it is unnecessary.

　　The design of the nozzle of the perfume can effectively prevent volatilization because the contact surface between the liquid in the nozzle and the air is very small, most of the nozzles are also designed to block contact with the air, after the outer cover of the perfume is closed to surround the nozzle In this case, the airflow around the nozzle will be lower, so the volatility will be very low, and only a small part of the small nozzle micropore to the nozzle device will volatilize, so there is no need to worry too much about the perfume passing through the perfume. Perfume atomizer and volatile problem.

　　Of course, if it is the kind of perfume similar to cologne that is unscrewed and applied, it will evaporate quickly in the air if the cap is not closed.