There are clear differences between vacuum pumps and vacuum generators in several ways.
First of all, they work differently. Vacuum pumps mainly pump air from the pumped container by mechanical, physical, chemical or physicochemical methods to obtain a vacuum. This process usually consists of three stages: gassing, gas capture and exhaust, where the gas filling stage is compressed by a vacuum pump and increasing its density, the gas capture stage is to fix the gas molecules on the surface of the equipment through adsorption, and the final exhaust stage is to discharge the gas. The vacuum generator is a device that converts gas into vacuum through chemical reaction or physical adsorption, which uses a positive pressure gas source to generate negative pressure, so that the pressure in the adsorption chamber drops below atmospheric pressure to form a certain vacuum.
Secondly, they also differ in structure. The structure of a vacuum pump is complex, including the pump body, gas collection chamber, piston, drive device and control system. The pump body is the main part of the vacuum pump, including the pump chamber, pump cover, air inlet, etc., and the inner wall of the pump is usually coated with active material to adsorb gas molecules. The structure of a vacuum generator, on the other hand, may be relatively simple and rely mainly on components that generate negative pressure.
In addition, their fields of application are also different. Vacuum pumps are widely used in metallurgy, chemical, food, electronic coating and other industries, especially in the occasion where high vacuum degree is required. The vacuum generator is mainly used in chemical experiments, biological experiments and other fields, as well as in industrial automation in the fields of machinery, electronics, packaging, printing, plastics and robots.
Finally, they also differ in terms of efficiency and cost. Vacuum pumps are usually able to pump out gas quickly and work efficiently, but they are also relatively expensive to maintain and require regular replacement of consumables. Vacuum generators, on the other hand, are relatively inefficient because they are relatively low maintenance but usually take a long time to convert the gas into a vacuum.
To sum up, there are obvious differences between vacuum pumps and vacuum generators in terms of working principle, structure, application field, work efficiency and cost. Therefore, when choosing which equipment to use, there are trade-offs to make based on specific application needs and conditions.
