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In the current air compressor market, variable frequency screw air compressor, permanent magnet variable frequency screw air compressor, secondary compression permanent magnet variable frequency air compressor and other series are all used to control the frequency converter to adjust the frequency of the air compressor, stabilize the outlet pressure of the air compressor, and realize the automatic switching of the air compressor equipment frequency conversion。What is the role of air compressor and inverter？
Plus the function of frequency converter
First, the air compressor is generally selected according to the actual demand of cold capacity in design conditions，Under normal circumstances, the compressor is running all year round，Straddle both winter and summer extremes，Therefore, it is faced with a relatively complex external environment，And there is inevitably a certain deviation between the actual working condition and the design scheme，Therefore, the compressor power will have an appropriate surplus。
Second, at this stage, the energy regulation of air compressors mainly includes intermittent control operation, suction regulation, cylinder unloading, by-pass regulation and endless variable speed regulation。The intermittent operation of the air compressor is a more common operation mode, the ambient temperature is higher than the set temperature, the compressor will start to run, the ambient temperature drops below the set temperature, the compressor will stop working。This working mode is suitable for the situation where the ambient temperature is relatively stable and the load is not large, but in the actual use process, the ambient temperature is not constant at any time。In extreme weather and complex working environment, various production activities will cause changes in cold load, frequent temperature changes, frequent engine start and stop, which will cause a large waste of energy, but also easy to wear machine parts。
Third, the instantaneous current of the generator will spread over the power grid, increasing the fluctuation of the power grid, and the life of the compressor will also be affected。Therefore, frequency conversion technology has also been more widely used in air compressors。
Under certain conditions, the compressor refrigeration capacity is proportional to the mass flow rate, and the basic idea of frequency conversion regulation is to adjust the mass flow rate by changing the compressor motor speed, so as to change the total unit refrigeration capacity。

Therefore, it is not difficult to see that the air compressor plus frequency converter, the use of frequency converter to achieve effective regulation of the frequency of the air compressor, whether from the subjective or objective point of view, is very worthwhile。It not only saves resources to a certain extent, but also improves the work efficiency of the air compressor system, which can bring more benefits to enterprises。

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