The working principle of Venturi Injector is a vacuum device that uses fluid to transfer energy and mass. It uses a certain pressure of water or gas flow through nozzles that are symmetrically and evenly distributed with a certain side slope, and aggregates in a focal point.  The manufacturer of Venturi Injector tells you that because the jet water flow rate is extremely high, the pressure energy is converted into velocity energy, and the pressure in the suction zone is reduced to produce a vacuum. Several high-speed water streams will grab the sucked gas, and fully mix and compress the throat through the contraction section of the venturi, so as to balance the speed of molecular diffusion and energy exchange. When the speed decreases through the expansion section, the pressure increases, and the pressure is greater than atmospheric pressure and sprayed into the water storage tank (pool) from the outlet, and non-condensable gas is precipitated. The manufacturer of Venturi Injector tells you that the water is recycled by the centrifugal pump to complete the suction process. Such a device is called an ejector. In this device, two fluids of different pressures are mixed with each other, and energy exchange occurs to form a mixed fluid with a middle pressure.

The characteristic of Venturi Injector vacuum is that the mixed fluid is divided into gas (vapor) phase, liquid phase, or a mixture of gas (vapor), liquid and solid. Before entering the device, the medium with higher pressure is called the working medium. The flow of working medium is called working fluid. The manufacturer of Venturi Injector tells you that the working fluid comes out of the nozzle at a high speed, enters the receiving chamber of the ejector, and takes away the medium with lower pressure in front of the ejector.
The fluid that is taken away is called the ejector fluid. Usually in Venturi Injector, the potential energy or thermal energy of the working fluid is transformed into kinetic energy at the beginning. Part of the kinetic energy of the working fluid is transferred to the ejection fluid. The manufacturer of Venturi Injector tells you that in the process of flowing along the ejector, the speed of the mixed fluid gradually equalizes, so the kinetic energy of the mixed fluid is converted into potential energy or heat energy instead.