Vacuum negative pressure working principle: single or double vacuum pumps as the main equipment for vacuum obtaining, vacuum tanks as vacuum storage equipment, connected to the electrical control part of the vacuum negative pressure station, double-pump work can strengthen the system security.
For the frequent use of vacuum source and the required pumping volume is not too large occasions, the vacuum station system than the direct use of vacuum pumps as a vacuum source saves energy and effectively extends the service life of the vacuum pump, improve the economic efficiency of the enterprise.
The use of negative pressure is very common, people often make a part of the space negative pressure state, you can use the ubiquitous atmospheric pressure for our effectiveness. For example, when people breathe, when the lungs are in the state of expansion of negative pressure, the formation of a pressure difference between the inside and outside of the lungs fresh air is pressed into the lungs.
Expanded information:
Scientific research, laboratories, medical care and other fields, there is often a gas pressurization of the Applications such as: pumping gas into a container that has a positive pressure, or a large resistance in the system that requires the pump to overcome the resistance to send gas, and so on. At this time, the pump is required to output a positive pressure higher than the atmospheric pressure, usually expressed in terms of "relative pressure".
High-pressure miniature air pumps, miniature vacuum pumps can output a maximum of >100Kpa (0.1MPa) positive pressure, itself belongs to the dry vacuum pumps, does not require vacuum pump oil and lubricants, does not contaminate the working medium, can be continuously operated for 24 hours, pumping and exhaust can be plugged, is particularly suitable for these occasions.
International vacuum industry common "vacuum", refers to the "ultimate vacuum, absolute vacuum, absolute pressure", but the "relative vacuum" (relative pressure, vacuum gauge pressure, negative pressure), Vacuum gauge pressure, negative pressure) due to the measurement of the method is simple, the measurement instrument is very common and more widely used.
Baidu Encyclopedia - Negative Pressure
Baidu Encyclopedia - Vacuum Negative Pressure Station