光电耦合在线测霜技术的可行性试验研究  

Feasibility of Photo-coupler Technology for On-line Frost Detecting

作　　者：王伟[1] 张富荣[1] 肖婧[1] 赵耀华[1] 

机构地区：[1]北京工业大学建筑工程学院,北京100124

出　　处：《应用基础与工程科学学报》2010年第2期299-303,共5页Journal of Basic Science and Engineering

基　　金：国家自然科学基金资助项目(50708002);北京市"供热;供燃气;通风及空调工程"重点实验室资助项目(KF200706)

摘　　要：将光电子领域的光电耦合原理引入霜层厚度的在线监测技术中,并对其可行性进行了试验研究.试验结果显示,光电耦合器在线测霜技术的输出电压信号具有明显的"二值"、"线性"两大特性,可实现对霜层厚度的直接感应,满足空调、制冷设备除霜控制判据的要求.此技术的开发将为霜层厚度的测量提供新的方法,可解决空调、制冷设备存在的"误除霜"问题,具有较高的实用价值和开发潜力.This study had been carried out to investigate the feasibility of using the photo-coupler method for defrost-control in refrigeration equipments. The photo-coupler sensors were setup on the cold finned heat exchangers in natural convection regimes. The experiment results indicated that the output voltages of the photo-coupler would change directly, with the frost growing up. The relationship of the output voltage signal with the frost thickness presented good characteristics, such as ＂ on-off＂ and ＂ linear ＂. These characteristics could meet the requirement of defrosting control criterion in air-conditioning or refrigeration facility.

关 键 词：光电耦合 霜层控制 误除霜 霜厚监测 

分 类 号：TK1[动力工程及工程热物理—热能工程]