What are the working principles of vacuum generators

The working principle of the vacuum generator is that when the compressed air enters the interior from the nozzle through the narrow nozzle, it accelerates, so that it passes through the diffusion chamber faster, and accelerates the diffusion in the diffusion chamber, and at the same time promotes the rapid outflow of indoor air. In addition, due to the spread of indoor air and the rapid outflow of compressed air, a vacuum effect is generated at the moment of indoor spreading. When the vacuum line enters the vacuum cleaner vacuum generator, it can be used for vacuum line extraction.

After the air in the diffusion chamber flows out from the diffusion chamber together with the compressed air and passes through the diffuser, as the air circulation space gradually increases, the air pressure from the exhaust port drops rapidly and integrates into the surrounding air. At the same time, due to the large noise generated by the accelerated air flowing out of the exhaust port, a muffler is usually installed at the exhaust port of the vacuum generator to reduce the noise of the compressed air.

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When the car is driving at high speed, if there are passengers in the car smoking, then if the car sunroof is opened, will the smoke not be quickly discharged from the sunroof opening? How about this effect is not very similar to that of a vacuum generator.