基于PLC的换热器温度交变试验研究  

Experimental study on alternating temperature of heat exchanger based on PLC

作　　者：王冠军 蒋权英 WANG Guanjun;JIANG Quanying(Zhejiang DunAn Thermal Technology Co.,LTD. ,Zhejiang Zhuji 311835,China;Wanxiang A123 System Asia Co.,Ltd. ,Zhejiang Hangzhou 311215,China)

机构地区：[1]浙江盾安热工科技有限公司,浙江诸暨311835 [2]万向一二三股份公司,浙江杭州311215

出　　处：《工业仪表与自动化装置》2021年第2期108-111,共4页Industrial Instrumentation & Automation

摘　　要：空调换热器需要进行可靠性试验以满足整机产品在不同环境下的寿命周期。可靠性试验中温度交变试验是较为关键的一项。该文选用晶体管输出型欧姆龙PLC,通过双稳态程序模拟可调脉宽调制控制输出控制固态继电器通断来改变加热器单位时间内的输出功率,实现高精度控制循环介质温度。实际应用中循环介质容器中的控制精度可达到±1℃,从而保证试验结果的重复性和稳定性。该研究为换热器可靠性试验以及在实际工程应用提供了参考价值。The air conditioning heat exchanger needs reliability test to meet the life cycle of the whole product in different environments.Temperature alternation test is a key item in reliability test.In this paper,the transistor output OMRON PLC is used to control the on-off of the solid-state relay through the bistable program simulation of the adjustable PWM control output to change the output power of the heater in a unit time,so as to achieve high-precision control of the circulating medium temperature.In practical application,the control accuracy of the circulating medium container can reach±1℃,so as to ensure the repeatability and stability of the test results.This study provides a reference value for the reliability test of heat exchanger and its application in practical engineering.

关 键 词：换热器 PLC 温度交变 可靠性 

分 类 号：TP273.5[自动化与计算机技术—检测技术与自动化装置]