CAJ | 학술논문

为解决小型冷库能耗高、温度波动大的问题,采用PLC自动控制系统,并对其进行了上、下位机程序设计和制冷性能实验.结果表明：小型冷库制冷系统制冷量与压缩机输入功率随着压缩机频率的升高而增大,而系统性能系数COP随着压缩机频率的升高而降低,但仍高于3．7,表明采用PLC 自动控制运行的小型冷库具有较好的节能特性.采用PLC自动控制策略的小型冷库温度波动±0．3℃,且能够实现无人值守自动运行.
위해결소형랭고능모고、온도파동대적문제,채용PLC자동공제계통,병대기진행료상、하위궤정서설계화제랭성능실험.결과표명：소형랭고제랭계통제랭량여압축궤수입공솔수착압축궤빈솔적승고이증대,이계통성능계수COP수착압축궤빈솔적승고이강저,단잉고우3．7,표명채용PLC 자동공제운행적소형랭고구유교호적절능특성.채용PLC자동공제책략적소형랭고온도파동±0．3℃,차능구실현무인치수자동운행.
In order to solve problems of the high energy consumption and large temperature fluctuation of cold stor-age, PLC automatic control system is applied to the cold storage, and program of the master and slave computer is designed. Furthermore, the cooling performances are also experimentally investigated. The experimental results show that the cooling capacity and compressor input power are direct ratio with compressor frequency, but the coef-ficient of performance( COP) is reverse with it. The COP is above 3. 7 in different frequency, which indicates that the cold storage with PLC automatic control system has good energy saving character. Furthermore, the temperature fluctuation of cold storage with PLC automatic control strategy is ± 0. 3℃, and the cold storage could complete un-attended operation.