Energy-saving control system of refrigeration compressor unit

Abstract

The invention discloses an energy-saving control system for a refrigerating compressor unit, which includes a refrigerating unit, a PLC controller, a man-machine interface, a frequency converter and a suction pressure sensor. The refrigerating unit includes a fixed-frequency compressor and a variable-frequency compressor. The frequency converter controls the speed of the variable frequency compressor so that the suction pressure of the variable frequency compressor is controlled at a value corresponding to the controlled ambient temperature; the suction pressure sensor is used to obtain the pressure of the variable frequency compressor in real time. The suction pressure of the suction port, and the suction pressure data is sent to the PLC controller, and the PLC controller adjusts the frequency converter in real time; the man-machine interface is used for numerical display and suction pressure start-up value setting Certainly.

Description

technical field [0001] The invention relates to the technical field of refrigeration equipment control, in particular to an energy-saving control system of a refrigeration compressor unit. Background technique [0002] With the development of the economy and society, the use of refrigeration equipment has become more and more extensive, and the huge demand for cooling capacity means huge energy consumption; while conventional energy has begun to show a state of exhaustion, energy conservation and emission reduction have become a major issue in production and life. A problem that needs to be paid attention to in various fields. As a high-energy-consuming equipment, refrigeration equipment will continue to rise with the extension of use time, the cost of power consumption, equipment damage and renewal, etc., resulting in an increase in the cost of use year by year. Energy waste. [0003] In order to achieve the purpose of energy saving and emission reduction in the refrig...

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Problems solved by technology

[0002] With the development of the economy and society, the use of refrigeration equipment has become more and more extensive, and the huge demand for cooling capacity means huge energy consumption; while conventional energy has begun to show a state of exhaustion, energy conservation and emission reduction have become a major issue in production and life. A problem that needs to be paid attention to in various fields. As a high-energy-consuming equipment, refrigeration equipment will continue to rise with the extension of use time, the cost of power consumption, equipment damage and renewal, etc., resulting in an increase in the cost of use year by year. Energy waste

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