Characteristics of small vacuum pumps

In recent years, with the further requirement of miniaturization and non-polluting working medium of vacuum pumps from all walks of life, small vacuum pumps and small air pumps with compact size, no oil and no maintenance, low noise and DC power supply have been widely used. Four


However, due to the variety of small vacuum pumps, small air pumps, such as: small vacuum pumps, small air pumps, micro sampling air pumps, micro pumps, micro pumps, dual-purpose pumps, micro circulating air pumps and so on; resulting in customers often a fog, in the end how to choose the most suitable working conditions, Xinweicheng What about the product?


Small vacuum pump, small air pump selection general principle: can use brushless motor as far as possible on the small vacuum pump, brushless vacuum pump parameters can not reach, and then use brush products.


The selection and classification of small vacuum pumps can be classified into two categories:


First, the classification of small vacuum pump, small air pump according to small vacuum pump integration is “brush motor” or “brushless motor” to classify.


Characteristics of small vacuum pumps


Advantages: the use of brush motor power, so the negative pressure, flow can be done relatively high, new technology for the brush product quality, performance, reliability are better, and the overall cost is lower than high-grade brushless vacuum pump.


Disadvantages: the life of the brush vacuum pump is shorter than that of high-grade imported brushless.


Characteristics of small vacuum pumps


Advantages: Long life, especially the use of high-grade imported brushless motor (Xinweicheng technology is), life is often close to tens of thousands of hours (full load); especially suitable for day and night continuous operation occasions, such as long-term on-line sampling pump use… It also has the function of “speed regulation”, that is, adjusting the speed of the motor (pwm speed regulation) by “duty cycle”, and even can realize advanced applications such as constant voltage, constant current and constant speed.


Disadvantages: negative pressure and other parameters are smaller than those with brush; the cost is higher than that with brush.


Therefore, in the case of parameters can be reached, should try to choose small brushless vacuum pump, brushless product parameters are not enough, then consider brush products


1. Micropump medium temperature problem: According to the temperature of the medium gas passing through the pump, choose ordinary or high-temperature type.


2. The reliability of the micro-pump: according to the severity of the consequences of the failure of the micro-pump, completely according to their own requirements. The average fault free running time of high quality products is greater than 1000 hours, some up to thousands of hours. In particular, this parameter is measured under full load, uninterrupted operation, is the worst working conditions, if the actual use is not full load or continuous operation, the value will be higher, depending on the pump operating conditions. This performance is a complete test of the technical strength of the manufacturer, from the appearance of some products can be seen, such as the use of special motors rather than ordinary low-cost motors, the volume of the case of heavy weight. You can know a little about the price of the product.


3. Electromagnetic Interference Problem of Micropump: If there is a precise circuit to control the micropump, depending on the anti-interference ability of the circuit, it may be necessary to order a micropump with low electromagnetic interference.