Frequency conversion screw air compressor
The control principle of the variable frequency screw air compressor:
Air compressors generally have the following characteristics: the configuration capacity is larger than the actual gas volume, the gas consumption is unstable, the air pressure requirement is stable, and the noise is as low as possible (especially at night). The variable frequency air compressor automatically changes the speed of the main engine according to the amount of gas used to reflect the change of system pressure and maintain a stable system pressure; when the system consumes less air volume; the amount of compressed air supplied by the compressor will be greater than the system consumption. The variable frequency compressor will reduce the speed and output the compressed air volume to maintain a stable system pressure. If the amount of compressed air supplied by the compressor is less than the system consumption when the system consumes more air, the inverter compressor speed will increase relatively, and the compressed air volume will be output to maintain a stable system pressure.
This mode of operation allows the variable frequency compressor to directly and quickly change the pressure of the reaction system and provide the required air volume change for the system. Through this mode of operation, the variable frequency compressor can maintain the output air volume and energy consumption. Optimal operating efficiency.
Advantages of variable frequency screw air compressor:
Advantage 1: efficient power saving
1. With variable speed control technology, the displacement of the compressor can be perfectly combined with the user's gas consumption, completely avoiding the loss of unloading power;
2. In the state of intermittent gas use, the zero load of the soft start avoids the peak of current and torque, so the unit can start and stop indefinitely. Really achieve 0~100% stepless speed change, maximally control the generation of useless work;
3, to avoid the extra 2bar pressure burden, let the air compressor unit directly save energy by 14%, because every 1bar of work pressure can save 7% energy loss.
Advantage 2: The variable frequency air compressor can set the pressure and maintain a constant pressure.
1. The unit will always maintain a constant pressure supply of ±0.1 bar under the required pressure;
2, to meet the user to set the pressure arbitrarily within the range of 3 ~ 14bar, without the need to change gears or belts;
(Note: the maximum pressure value should be determined when purchasing the machine);
3. When the gas volume is small, the pressure remains constant and the rotation speed is automatically reduced to meet the gas volume that is only sufficient.
4. When the gas consumption is large, the pressure remains unchanged and the rotation speed is automatically compensated to ensure the gas supply amount;
Advantage 3: Remote control
With advanced control, surveillance and communication systems, users can easily obtain technical assistance from suppliers around the world in time.
Advantage 4: Saving energy
The air compressor with the frequency converter installed is compared with the conventional air compressor: the air compressor with the frequency converter installed can automatically adjust the operation of the air compressor according to the amount of gas used, which can save energy and has remarkable effect.
Advantage 5: Energy saving and emission reduction, scientific development
One year energy-saving recovery and the difference between non-frequency conversion units, three years of energy-saving recovery of the entire inverter unit investment costs!
Advantage 6: More reliable
1. Variable frequency soft start avoids electrical shock and avoids mechanical shock;
2. Exempt the unfavorable factors of long-term high-speed operation of the unit;
3, no contactor, to avoid electrical contact failure;
4, exempt from high pressure, reducing the probability of system leakage.
Advantage 7: Extend the service life of the air compressor
The inverter starts the air compressor from 0Hz, which can adjust the starting time of the air compressor, thus reducing the impact on some electrical components or mechanical components inside the air compressor during starting, enhancing system reliability and making the compressor service life. extend.
In addition, variable frequency control can reduce current fluctuations when the unit starts, which can affect the power consumption of the power grid and other equipment. The frequency converter is able to effectively minimize the peak value of the starting current.
Advantage 8: Low noise of the inverter air compressor
After the frequency converter is installed, the speed of the motor is significantly slowed down in the required working condition of the compressor, and the noise generated by the air compressor is significantly reduced. According to the on-site inspection, the current noise is 3-7 decibels lower than the original noise.
