Theoretical and Experimental Study on Intelligent Control of Variable Capacity Refrigeration System

Theoretical and Experimental Study on Intelligent Control of Variable Capacity Refrigeration System

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In order to improve the superheat control precision of the variable capacity refrigeration system, and establish the simple superheat control method, Cough and Cold Relief an intelligent superheat control strategy based on the traditional PID control strategy was proposed, with various influencing factors considered.The actual superheat control effect of the intelligent control strategy was checked in a cold store with constant temperature and humidity, and was compared with the control effect of thermostatic expansion valve.The experimental results show that: the intelligent control strategy gives a better performance such as faster dynamic response, lower overshoot, and shorter oscillation time compared with traditional PID control strategy.

It is advantageous to superheat stability, if the compressor frequency changes as the interference factors are inputted in advance.The intelligent control strategy is better than the thermal expansion valve on the superheat Side View Camera Bundle control effect, and the cold store cooling time is shortened by 37.14%.