真空绝热板负压膨胀与吸盘响应关系

摘要

In view of the vacuum insulation panel (VIP)with silica or glass fiber,we can measure the in-ner pressure to judge its quality.Based on the negative pressure expansion method (i.e.,inverse vacu-um method),this paper develops an instrument to measure VIP′s inner pressure quickly and efficiently, so as to identify whether the VIP is qualified or not.Compared the measuring results with the theoreti-cal value,it is proved that the accuracy of instrument is high and its error can be controlled within 1％. Then,for the VIP with glass fiber,the effect of different diameter sizes of suckers on inner pressure measuring is studied,and test result shows that only the sucker with small diameter size can measure the inner pressure.Finally,using the MATLAB linear fitting module,the function relationship of inner pressure and thermal conductivity of two kinds of VIP is discussed,which can guide the high-quality producing of VIP theoretically.%对于市场前景广阔的气相二氧化硅和玻璃纤维芯材的真空绝热板(Vacuum insulation panel,VIP),可以通过检测其内压值来检测VIP质量.本文以负压膨胀法(即逆真空法)原理研发了内压测试仪,可以快速有效地测试VIP板内压强值,以此判别该VIP板是否合格.对测试结果与理论值进行对比发现,该测试仪精确度较高,误差可以控制在1％左右.然后,研究了不同口径大小吸盘对玻璃纤维芯材VIP内压测试结果的影响,试验证明仅小口径吸盘才能成功地测试该类VIP板内压值.最后,采用MATLAB线性拟合模块研究了两种VIP板内部压强与导热系数的关系式,可以从理论上更好地指导VIP板的高质量生产.