One uses Bernoulli's principle. Bernoulli's principle s […]
One uses Bernoulli's principle. Bernoulli's principle says that in the same fluid, the flow rate is large, but 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 three-pronged pipe, the low-speed flowing water flows to the high-speed flowing air. The water is torn into droplets by high-speed air (Imagine that the water flowing out of the faucet has a slow speed at first, which is a column of water; but then the speed gradually increases and then becomes drop by drop). These small water droplets become fog after spraying out.
The second method is to press water into a thin tube to cause a high-speed water flow. The high-speed water flow breaks into small water droplets when it hits an obstacle. The situation is like turning the faucet big and blocking it with your fingers. Household sprayers often use this structure, and the cost is low.
The third is to charge the water (water is a dielectric), and use the same kind of charge to repel each other to divide the water into droplets. The droplets of this method are very small. The same principle is used to paint cars.
The fourth type is ultrasonic atomization. Vibration can cause "sprays" on the water surface. The vibration frequency of ultrasonic waves is very high, so the wavelength of its "waves" is very small, so its "sprays"—small water droplets are also very small, and these small water droplets become fog. The throat spray machine used to treat respiratory diseases in the hospital uses ultrasonic atomization.
Household sprayers in our lives can be roughly divided into two parts: the bottle part, which is used to hold water; the cap part, which is used to spray water. The principle lies mainly in the cover.
There is a handle in the center of the cover part, and a plastic tube is connected with the handle, and the plastic tube extends into the bottle part all the time. At the bottom of the plastic pipe, there is a small hole to allow water to enter the plastic pipe. Pull the handle to drive the piston up, so that the air enters the plastic tube; press down the handle to drive the piston down, push the air into the bottle, so that the air generates pressure on the water, and push the water into a thinner, thinner tube next to the plastic tube. In the pipe where the nozzles communicate. On the front and back sides of the handle, there are variable nozzles and switches. The sprinkler head can be adjusted to make the amount of water sprayed properly; press the switch, and the water will spray out of the sprinkler head.