Control method for normal operation of variable-frequency magnetic suspension centrifugal type central air-conditioning unit

Abstract

The invention relates to the field of variable-frequency magnetic suspension air conditioners, in particular to a control method for normal operation of a variable-frequency magnetic suspension centrifugal type central air-conditioning unit, and the control method mainly can guarantee the unit to smoothly start and operate. The control method comprises the following steps: (1) setting a warning compression ratio, a refrigerant cooling cycle minimum compression ratio, a compressor discharge pressure pre-warning value and a compressor suction pressure pre-warning value by a computer controller; (2) judging the compression ratio of the compressor; and starting the compressor when a ratio of the discharge pressure to the suction pressure is smaller than the warning compression ratio; (3) after starting the compressor, increasing workload to the compressor by the computer controller, thereby speeding up the compressor; (4) judging discharge pressure and suction pressure of the compressor; and (5) after the opening degree of an electronic expanding valve is stable, continuously judging whether temperature of a cooling frequency converter and a motor of the compressor at this moment are stable or not; and directly entering the normal operation of the compressor until work is ended when the temperature is stable.

Description

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AI Technical Summary

Benefits of technology

This technology helps control how much coolant flows into an indoor space by adjusting its flow rate based on factors like outside temperatures or humidity levels. It also uses electronics that help keep it warm properly during winter months when there are no external sources of heat (such as sunlight). Overall this allows for efficient and reliable systems used at home or workplace locations where they require constant power supply from main electric wires.

Problems solved by technology

This patented technical problem addressed in this patents relating to improving an efficient use of space inside buildings while reducing their power consumption through improved heat management systems that utilizing magnetism (magnetic force) techniques.

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