When it comes to spray bottles, many people think of cosmetic packaging and household sprays. A spray bottle is a very useful device and a good example of basic pipe pumping principles. The head of the spray bottle consists of only a few parts. It has a trigger that triggers a small water pump. The pump is connected to a plastic tube that draws cleaning fluid from the bottom of the reservoir.

    This pump presses liquids into a narrow cavity and ejects them through small holes in the sprayer tip. This hole, or nozzle, allows the flowing liquid to gather together into a concentrated stream of water.

    The only complex in this design is the hydraulic pump, but its construction is also quite simple. Its main moving element is a piston, located in a cylindrical hydraulic chamber. Inside the hydraulic chamber, there is a small spring.

    In order for the hydraulic pump to run, you first pull the wrench back, which pushes the piston into the hydraulic chamber. The moving piston compresses the spring, and when the wrench is released, the piston is pushed out of the hydraulic chamber. The two strokes of the piston in and out of the hydraulic chamber constitute a complete pump cycle.

    Both the vacuum spray bottle and the ordinary spray bottle are in the shape of a cylinder, but there will be a piston under the vacuum spray bottle. This piston can contract like a spring, so it will block air from entering the bottle so that the bottle is completely in a vacuum state.