Intelligent unit system for freezing and refrigerating system and control method thereof

Abstract

The invention discloses an intelligent unit system for a freezing and refrigerating system and a control method of the intelligent unit system. The system comprises a compressor controller, and the compressor controller comprises a switching value input interface, a switching value output interface, a PT100 input interface, an analog quantity input interface, an analog quantity output interface, an energy carrying position acquisition input interface, an Ethernet interface and a serial port communication interface, and the method comprises a universal control method, an energy loading positionhigh-precision acquisition method and a compressor load limiting control method. According to the control method, diversified design requirements of the compressor system can be met, and control overthe freezing and refrigerating system is more universal, accurate and intelligent through measurement of an energy carrying capacity voltage percentage method and a host current and exhaust pressureload limiting control method.

Description

technical field [0001] The invention relates to a smart unit of a freezing and refrigerating refrigeration system, and also relates to a control method of the unit. Background technique [0002] Due to the diversity of user needs, the current refrigeration control unit system has the problem of poor versatility. Designers need to repeat the design according to individual non-standard requirements, resulting in a large investment of manpower and material resources. At the same time, the system error rate continues to increase. [0003] On the other hand, the previous system control was relatively extensive, and the load resistance value of the compressor was affected by the difference in the instrument and the temperature of the compressor, and the measurement deviation was large, which affected the control accuracy. [0004] Thirdly, the current control system does not have the load limit function. During the user's use, the main engine is often overloaded or the exhaust pre...

AI Technical Summary

Problems solved by technology

[0002] Due to the diversity of user needs, the current refrigeration control unit system has the problem of poor versatility. Designers need to repeat the design according to individual non-standard requirements, resulting in a large investment of manpower and material resources. At the same time, the system error rate continues to increase.

[0003] On the other hand, the previous system control is relatively extensive, the load resistance value of the compressor is affected by the difference of the instrument and the temperature of the compressor, and the measurement deviation is large, which affects the control accuracy

[0004] Thirdly, the current control system does not have the load limit function. During the user's use, the main engine is often overloaded or the exhaust pressure is high due to various reasons, which in turn causes the compressor to stop due to failure, which not only affects the service life of the compressor, but also delays the user's production.

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