Hot Sales Silent 7.5kw-55kw 10HP-75HP Twin Air Cooled Oilless Air Compressors Inverter Single Rotary Screw Air Compressor with CE & ISO

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1.Optional setting pressure, and maintain a constant water pressure.

2.To save energy.

3.High efficiency power-saving.

4.More reliable.

Analysis of frequent loading and unloading of frequency conversion air compressor

Compared with the power frequency, the air consumption of the inverter compressor is adjustable, and the start is smooth. The air supply pressure will be more stable than the power frequency. However, sometimes the inverter compressor such as the power frequency compressor will be frequently loaded and unloaded. air compressor technology

A simple analysis of this phenomenon reveals that frequent loading and unloading situations usually occur in the following situations:

01 The set value of air supply pressure and unloading pressure is too close.

When the compressor reaches the air supply pressure, if the air consumption suddenly decreases and the frequency converter is too late to control the motor deceleration, the air production will be too large, resulting in unloading.

Solution

Set the difference between the supply pressure and the unloading pressure to be larger, usually the difference is ≥0.05MPa.

02 When the motor is running at a constant frequency, the panel display pressure fluctuates up and down.

Solution

Change a pressure sensor.

03

The user's gas consumption is unstable and will suddenly increase and reduce the gas consumption greatly. At this time, the air supply pressure will change, and the inverter controls the motor to change the output air volume to maintain the stable air supply pressure. However, the rotation speed of the motor has a speed. When this speed cannot keep up with the speed of the gas consumption change at the gas end, it will cause the pressure of the machine to fluctuate, and then there may be loading and unloading.

Solution

(1) The user should not suddenly use multiple gas-using equipment, and can turn on the gas-using equipment one by one.

(2) Adjust the frequency conversion speed of the frequency converter faster, so that the change speed of the output gas volume can be increased to adapt to the change of the gas consumption.

(3) Use a large-capacity gas storage tank to buffer.

04 The user's gas consumption is too small.

Generally, the frequency conversion range of permanent magnet inverter compressors is 30%~100%. The frequency conversion range of asynchronous inverter compressors is 50%~100%. When the user's air consumption is less than the lower limit of the compressor output, the air volume reaches the set air supply pressure. At this time, the inverter will control the motor to reduce the frequency to the lower limit frequency and the output gas volume to output compressed gas. However, because the gas volume is too small, the gas supply pressure will continue to rise until the unloading pressure and the machine are unloaded. Then the air supply pressure drops, and when the pressure drops below the loading pressure, the machine is reloaded. air compressor technology

Analysis

Here I want to make an analysis of this situation. That is, when the machine is unloaded with a small amount of air, should the compressor enter the dormant state, or how long it will take to unload it before entering the dormant state. When the machine is unloaded, the air end is also using air, but once the compressor enters the dormant state, the compressor is no longer producing air. At this time, the air supply pressure will drop. After it drops to the loading pressure, the machine is loaded. There will be a situation here, that is, when the machine restarts from the sleep state, the pressure of the user is still falling, and it is very likely that the air supply pressure will be lower than the loading pressure, or even far below the loading pressure, resulting in the air supply pressure. It is too low or the air supply pressure fluctuates extremely greatly. Therefore, it is recommended that the time to enter the dormant state after uninstallation should not be too short. air compressor technology

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