24

2020

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08

CNHT micro pump_ Connection and difference between micro negative pressure pump and micro positive pressure pump

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With the continuous development of industrialization and the continuous miniaturization of products in all walks of life, CNHT micropumps are becoming more and more popular. CNHT micro pump has the further requirements of small size, easy to carry, non polluting working medium and other characteristics. The product is oil-free, maintenance free, low noise, portable, and common is DC powered micro vacuum pump, which has been applied in many fields.

 

Generally, CNHT micropumps have two inlets: air inlet and air outlet, and those that can produce air pressure lower than normal pressure (i.e. atmospheric pressure) at the inlet are called "negative pressure"; It is called "positive pressure" that can produce air pressure higher than normal pressure at the exhaust port; For example, the commonly said vacuum pump is a negative pressure pump, and the booster pump is a positive pressure pump.

 

The difference between the positive and negative pressure pumps of the micro vacuum pump in the CNHT micro pump: the micro air pump has two ports of air inlet and air outlet, and the one that can produce air pressure lower than the normal pressure (i.e. atmospheric pressure) at the air inlet is called "negative pressure"; It is called "positive pressure" that can produce air pressure higher than normal pressure at the exhaust port; For example, the commonly said vacuum pump is a negative pressure pump, and the booster pump is a positive pressure pump. There is a big difference between the micro positive pressure pump and the negative pressure pump. For example, the flow direction of the gas, the negative pressure pump is the external gas is sucked into the air extraction nozzle; Positive pressure is sprayed from the exhaust nozzle; For example, the level of air pressure. In fact, "negative pressure pump" and "positive pressure pump" are artificially distinguished from each other mainly from their functions and main purposes. "Negative pressure pump" is mainly used in the places where vacuum (negative pressure) is required, such as: air extraction, gas analysis, gas circulation, gas sampling, vacuum adsorption, indirect water absorption, etc; The "positive pressure pump" is mainly used to transfer gas, pressurize closed containers, inflate and pump air, indirectly pressurize water, etc.

 

There is no absolute difference between the positive and negative pressure pumps of the micro vacuum pump of CNHT micro pump. The exhaust end of the "negative pressure pump" also has positive pressure, which is only a slight positive pressure, much smaller than the output pressure of the "positive pressure pump"; The pumping end of "positive pressure pump" also has a slight negative pressure, which can complete the function of pumping. Of course, in many cases, CNHT micropump requires that both the suction end of the pump can provide a higher negative pressure and the exhaust end needs to output a larger positive pressure.

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