山东冷库造价节能控制系统的主要特点以及存在的问题, 冷库经过了原始的机械制冷、氨液设备制冷、氟设备制冷一直到现在环保节能冷库，一步步走向今天更节能、更环保、更有效的自动化管理。

The main characteristics of energy saving control system and the existing problems of cold storage after the original mechanical refrigeration equipment, refrigeration equipment, liquid ammonia fluorine refrigeration until now, environmental protection and energy saving refrigerator, a step toward today more energy-saving, more environmental protection and more effective automation management.

1、压缩机三角起动时对压缩机设备以及电网冲击，影响设备使用寿命;而且，设备起动完成后只能全速运行，通过调整回气阀门(蒸发压力)开口度来控制制冷能力。造成电耗浪费，设备故障率较高，运行的经济性差。

1, the compressor delta starting the compressor equipment as well as the impact of the power grid, affect the service life of the equipment; moreover, equipment starting operation only after the completion of full speed, by adjusting the air return valve (evaporation pressure) to control the cooling capacity of opening. The power consumption is wasted, the equipment failure rate is high, and the operation economy is poor.

2、冷库设备自动控制水平低，完全依赖于人工操作，而人的主观能动性与技术水平等，因人因时等都有很大的差异，难以达到最佳控制。

2 cold storage equipment, low automatic control level, completely rely on manual operation, and people's subjective initiative and technical level, because when there are great differences, it is difficult to achieve optimal control.

3、各分支库根据储物不同或出入库情况变化以及保温性能差异，难以做到各分支库根据自身需求，分别自动调节制冷量，对原不需要制冷的分支库造成过度制冷的浪费现象;蒸发器除霜以及冷却水泵运行难以达到最佳效果。

3, according to the different branches of the library storage or storage conditions change and insulation performance differences, difficult to achieve various branches of the library according to their own needs, which automatically adjust the cooling capacity of the original, without Branch refrigeration caused excessive cooling waste; defrosting and cooling water pump operation is difficult to achieve the best effect.

4、冷库的自控系统采用S7 PLC控制与编程;通过MPI通讯实现与上位机之间的数据通讯;对于大型冷库，采用Profibus-dp通讯方式，与各分支冷库、冷却间控制设备实现全数据交流;

Automatic control system of 4 cold storage using S7 PLC control and programming; communication through MPI data communication between the host computer; for large cold storage, the use of Profibus-dp communication, and each branch of the cold storage, cooling control data exchange equipment;

5、对调节站的进气阀改为电动机构，增设各类所需的传感器，实现PLC自动控制。

5. The intake valve of the control station is changed into an electric mechanism, and various types of sensors are added to realize the automatic control of the PLC.

6、制冷压缩机采用交流变频调速装置拖动;通过modbus通讯与PLC实现全数据交换以及控制;

6. The refrigeration compressor is driven by AC frequency conversion device. The whole data exchange and control are realized by Modbus communication and PLC;

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