Under normal circumstances, the pump will have two ports, namely the intake port and the exhaust port. At the air inlet, it can produce a pressure lower than normal pressure (that is, atmospheric pressure), called "negative pressure"; at the exhaust port, it can produce a pressure higher than normal pressure, called "positive pressure"; for example, the vacuum pump we often say is a negative pressure pump The booster pump is a positive pressure pump.

【the difference】:

　　 Positive pressure pumps are very different from negative pressure pumps. For example, the gas flow direction, negative pressure pump is the external air is sucked into the suction nozzle; positive pressure is sprayed from the exhaust nozzle; such as the level of the air pressure.

　　 In fact, "negative pressure pump" and "positive pressure pump" are mainly artificially distinguished from function and main purpose. "Negative pressure pump" is mainly used in vacuum (negative pressure) requirements, such as: pumping, gas analysis, gas circulation, gas sampling, vacuum adsorption, indirect water absorption, etc.; "positive pressure pump" is mainly used for The pump is used as the power to carry out gas transfer, pressurize the closed container, inflate the air, indirectly pressurize the water, etc. Both are commonly used in medical, scientific research, environmental protection, instruments, control, etc.

　　【Contact】:

　　 The two are not absolutely different.

The negative end of the "negative pressure pump" also has positive pressure, but it is only slightly positive pressure, which is much smaller than the output pressure of the "positive pressure pump". For example, our micro vacuum pump 2XZ and other series are "negative pressure pumps", "Suction pumps", and their exhaust end pressure is often only a few kilopascals (KPa);

　　 The suction end of the "positive pressure pump" also has a slight negative pressure to complete the role of pumping.

Of course, in many cases, when both the suction end of the pump can provide a higher negative pressure and the discharge end needs a larger positive pressure, our micro-pumping and pumping pumps can accomplish this well. Claim.

Simply put, the negative pressure pump is the air pump, and the positive pressure pump is the air pump. The relationship between the two is opposite to the interface of the container. This is because each pump is an air inlet and an air outlet, which is directly connected to the air. , Reverse pumping. One pump and two uses.