Screw air compressor permanent magnet frequency conversion machine advantages

Granklin Group is a domestic manufacturer of self-produced water-lubricated air compressors. We can achieve a pressure of 0.15-4Mpa. Water-lubricated air compressors can provide pure oil-free compressed air for enterprises.

Energy saving inverter control of the air compressor and the traditional control of the air compressor, the energy saving version is the most important and the most important, according to the demand for compressed air to adjust the supply of air compressor running state.

Air pressure stability-variable frequency screw air compressor using the characteristics of the inverter stepless speed regulation, through the controller or inverter internal PID regulator, can start smoothly. For occasions with large fluctuations in gas consumption, it can quickly adjust the response.

Operating cost reduction-The operating cost of an air compressor consists of three components: initial purchase cost, energy cost and maintenance cost. Among them, energy costs and maintenance costs account for the main part of the total cost of air compressors. Through the reduction of energy costs, coupled with the reduction of the impact on the equipment after the inverter is started, the maintenance and repair volume is also reduced, so the operating cost will be greatly reduced.

improve control accuracy and extend service life-The frequency conversion control system has precise pressure control capabilities, so that the air pressure output of the air compressor matches the air volume required by the user's air system. Under the frequency conversion control, the air compressor displacement will change with the change of the motor speed. As the accuracy of the frequency conversion control motor speed is improved, it can keep the system pressure change of the pipe network in a stable range, and effectively improve the quality of the working condition.

Reduce the noise of the air compressor-according to the actual working conditions of the air compressor, after the transformation of frequency conversion speed regulation, the motor running speed is significantly slowed down, thus effectively reducing the noise of the air compressor during operation and ensuring the health of the on-site staff.

screw air compressor working principle:

at present, the air compressor adopts two-point control (upper and lower limit control) or start-stop control (small air compressor), that is, when the pressure in the compressed gas cylinder reaches the upper limit of the set value, the air compressor passes its own air pressure or Oil pressure closes the intake valve, and the small air compressor stops. When the pressure drops to the lower limit of the set value, the air compressor opens the intake valve, and the small air compressor starts again. The traditional control method is easy to impact the power grid, and it also has certain damage to the air compressor itself, especially when the gas consumption fluctuates frequently.

Under normal operating conditions, the air is compressed to the air storage tank. The detection of various points of the air compressor (including compressed air temperature, pressure, screw temperature, cooling water pressure and temperature, oil pressure, oil temperature, etc.) and the overall control are controlled by the main control single board computer. When the outlet pressure of the air compressor reaches the upper limit of the set value, the air inlet shall be closed by the oil pressure shunt valve, and the inner circulation pipeline shall be opened at the same time for self-circulation operation. At this time, the gas consumption unit continues to use gas. When the pressure drops to the lower limit of the set value, the oil pressure shunt valve closes the circulation pipeline, opens the air inlet, and the air is compressed into the air storage tank by the filter. In static state, the original starting mode (Y-△), loading and unloading will cause great impact on the power supply and distribution equipment and screw. Especially the serious waste of energy. The main motor speed drops, and the shaft power will drop a lot. Energy saving potential is considerable.

The effect of frequency conversion energy saving is very significant, especially for systems and equipment with large adjustment range. Through practical application, it can be seen intuitively that as long as the speed (frequency) is slightly changed when the flow changes, the shaft power will be changed to a greater extent. Because of this feature, frequency conversion speed regulation (energy saving) has become a trend and has been deeply applied to various industries and various adjustment fields.

inverter screw air compressor control principle:

air compressor use occasions generally have the following characteristics: the configuration capacity is larger than the actual gas volume, the gas consumption is unstable, the pressure requirement is stable, and the noise should be as low as possible (especially at night). The variable frequency air compressor automatically changes the rotation speed of the main engine according to the amount of air used to reflect the change of system pressure and maintain a stable system pressure. When the system consumes less air; At this time, the compressed air volume provided by the compressor will be greater than the system consumption, and the variable frequency compressor will reduce the rotation speed and output the compressed air volume to maintain a stable system pressure value. If the system consumption air volume increases, the compressed air volume provided by the compressor will be less than the system consumption at this time, the speed of the inverter compressor will increase relatively, and the compressed air volume will be output to maintain a stable system pressure value.

This mode of operation allows the inverter compressor to directly and quickly respond to changes in system pressure and provide changes in air volume required for system consumption. Through this mode of operation, the inverter compressor can maintain the best operating efficiency between the output air volume and energy consumption.

advantages of frequency conversion screw air compressor:

advantage one: frequency conversion air compressor you can remote control

using advanced control, monitoring and communication systems, users can easily obtain timely technical assistance from suppliers all over the world through the Internet.

Advantage 2: Variable frequency air compressor can set the pressure at will and maintain a constant supply pressure

1. The unit will always maintain a constant pressure gas supply of ± 0.1bar pressure under the set required pressure;

2, satisfied with the user in the range of 3 ~ 14bar arbitrary set pressure, without the need to change the gear or belt;

(Note: The highest pressure value should be determined when purchasing the machine);

3. When the gas consumption is small, the pressure remains the same and the rotation speed automatically decreases, satisfying only enough gas.

4, when the amount of gas is large, the pressure remains unchanged and the speed is automatically compensated to ensure the need for gas supply;

advantage three: efficient power saving

1. With the 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 peak value of current and torque is avoided through the zero load effect of soft start, so the unit can start and stop indefinitely. Truly achieve 0~100% stepless speed change, maximum control of useless work;

3, to avoid the pressure burden of more than 2bar, so that the air compressor unit directly energy saving 14%, because every 1bar to reduce the working pressure, can save 7% of the energy loss.

Advantage four: saving energy

compared with the traditional air compressor, the air compressor equipped with frequency converter can automatically adjust the operation of the air compressor according to the air consumption, which can save energy and achieve remarkable effect.

Advantage five: energy saving and emission reduction, scientific development

one year energy-saving recovery and non-variable frequency unit comparison of the difference, three years energy-saving recovery of the entire variable frequency unit investment cost!

Advantage six: more reliable

1. Frequency conversion soft start avoids electrical impact and mechanical impact;

2, to avoid the long time high-speed operation of the adverse factors;

3, no contactor, to avoid electrical contact failure;

4. The high pressure of 2bar is eliminated, which reduces the probability of system leakage.

Shanghai granklin group is the choice for purchasing water lubricated air compressor. we welcome users to visit our factory.