The girls sprayed toner and spray, the painters used sp […]
The girls sprayed toner and spray, the painters used sprayers for spray painting, and the street artists used graffiti for sprayers. When the advertisers made advertisements, they also saw sprayers. Why can the sprayer spray water and raw materials? After careful collection, Xiaobian will tell you about the principles of the sprayer today, let's take a look!
The first one uses the Bernoulli principle. The Bernoulli principle says that in the same fluid, the flow rate is large and the pressure is small; the flow rate is small and the pressure is strong. The fluid will automatically flow from high pressure to low pressure. When passing through the trigeminal tube, the low-speed flowing water flows to the high-speed flowing air. The water is torn by a high-speed air into a small drop (assuming that the water flowing out of the faucet is slow at the beginning, it is a water column; but then the speed gradually increases and becomes a drop). These small water droplets are sprayed out and become fog.
The second type uses the principle that the water is pressed into the thin tube to cause high-speed water flow, and the high-speed water flow breaks into obstacles and then breaks into small water droplets. The situation is like plugging the faucet with your fingers, and the sprayer for the home uses this structure because of the low cost.
The third is to let the water carry a charge (water is a dielectric), using the same kind of charge mutually exclusive to divide the water into droplets. The droplets of this method are small. The same principle is also used to paint cars.
The fourth is the principle of ultrasonic atomization. Vibration can cause "spray" on the surface of the water. The vibration frequency of the ultrasonic wave is very high, so its "wave" has a very small wavelength, so its "spray" - small water droplets are also small, and these small water droplets become fog.
The fifth is the piggyback principle. When the operator tilts the rocker or the handle up and down, the rod is reciprocated up and down in the pump cylinder through the connecting rod, and the stroke is 40-100 mm. When the plug rod is ascending, the cup moves from bottom to top, and the volume of the cavity formed by the cup and the pump cylinder under the cup is continuously increased to form a partial vacuum. At this time, the liquid medicine in the liquid medicine tank is flushed into the water inlet valve under the pressure difference between the liquid surface and the cavity body, and enters the pump cylinder along the water inlet pipe to complete the water absorption process. When the plug rod descends, the cup moves from top to bottom, and the liquid in the pump cylinder is squeezed, so that the pressure of the liquid medicine suddenly increases. Under the action of this pressure, the inlet valve is closed, the outlet valve is opened, and the liquid enters the air chamber through the outlet valve. The air in the air chamber is compressed to generate pressure on the liquid. After the switch is turned on, the liquid is sprayed through the spray bar into the nozzle. In a hollow conical mist nozzle, including a tangential inlet nozzle or a nozzle having a hydrocyclone, the liquid enters the vortex chamber from the tangential inlet passage or from the spiral passage of the hydrocyclone and the hydrocyclone, and the liquid occurs. Rotating, the orifice is on the axis of the vortex chamber, so that the ejected liquid forms a hollow conical film which is then pulverized into droplets. As for the nozzle having the double-slot water-repellent core, the liquid passes through the water core from the axial liquid inlet passage on the water-jet core, and then tangentially enters the vortex chamber composed of the pit and the nozzle piece in the center of the front portion of the water-repellent core. The nozzle of the slit nozzle has a semicircular spherical end and a V-shaped slit at the outside, and the two streams ejected by the curved surfaces on both sides of the V-shaped groove collide with each other to generate a liquid in the direction of the slit. The membrane, the liquid membrane acts with a stationary air medium to form a fan-shaped mist flow.