Air compressor energy-saving control method

Abstract

The invention mainly discloses an air compressor energy-saving control method. A a frequency conversion starting mode and a power frequency starting mode are set for a motor of an air compressor; and the selection of the two modes are realized by a control circuit which is formed by a contactor. Frequency conversion starting is driven by a transducer; and control signals of the transducer for the motor are determined according to a pressure transmitter on an air reservoir of the air compressor. At the same time, in the method, a distributed control system DCS is adopted; the pressure transmitter is a data acquiring station of the DCS; the transducer is a controlled object of the DCS; and a remote computer or an industrial computer is used as an operator station or an engineer station of the DCS. The method has the characteristics of energy conservation, high control accuracy, low energy consumption and excellent performance.

Description

technical field [0001] The invention relates to the technical field of energy saving of air compressors (abbreviated as air compressors), in particular to an energy saving control method of air compressors. Background technique [0002] The operation mode of the main motor of the existing air compressor is mostly full pressure operation after star-delta decompression start. The unit operates in the opening and closing control mode of the intake valve. The valve is closed when the pressure of the gas storage tank is at the upper limit, and the valve is opened when the pressure of the gas storage tank is lower. The efficiency is low, the operating current is large, and the equipment consumes a lot of energy. [0003] In order to save electricity, the on-site operators have to start and shut down manually, which is not only labor-intensive, but also the control is not timely enough, and the unit starts frequently. The frequent start-up of the unit increases the load, the inrus...

AI Technical Summary

Problems solved by technology

When the air supply pressure is low, the process requirements cannot be met; when the air supply pressure is high, the power consumption is high

However, in order to meet the process requirements, the gas supply pressure must be high, resulting in high gas supply costs and high energy consumption.

Due to the high operating speed and the frequent opening and closing of the intake valve, the machine room is noisy

[0005] In addition, the general air compressor has a working state of power frequency or frequency conversion, so the working mode is single. When the frequency converter or power frequency branch is damaged, it will not work normally.

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