冰箱保温层设计.doc

毕业设计题目:冰箱保温层设计院(系):专业年级:姓名:xxx学号:xxx指导教师:xxx年月日摘要硬质聚氨酯泡沫塑料广泛应用于建筑,石油、化工、轻工、运辅、城市供热、制冷及食品冷藏与加工:是冰箱,冰柜、飞机机身、轮船壳体,客运车箱,活动板房等最优良的绝热材料;还常被用做船,浮体、快艇、救捞器材的充填材料以及易碎商品包装材料;开孔型的硬泡是良好的吸音,消声材料。聚氨酯材料可以用于管道保温,但是管道保温材料不仅仅是聚氨酯这一种,也可以是其他的,例如岩棉、珍珠岩等,根据不同的环境和需要选择不同的材料。聚氨酯材料是可以回收再利用的。废旧聚保温氨酯材料的再生利用方法有:粘结制再生泡沫塑料,粉碎后热压成制品,粉碎成粉末作为生产泡沫塑料等的填料;通过醇解、***解或水解工艺将泡沫分解再生多元醇,再用于制泡沫塑料,等等。硬质聚氨酯泡沫塑料因其优良的隔热保温、独特的抗水渗透及化学稳定性,加上轻质、成型方便,成为冰箱保温层不可或缺的保温材料。针对冰箱门体因硬质聚氨酯泡沫塑料充型脱模后的变形易产生报废返修问题,本文拟采用硬质聚氨酯泡沫塑料作为原料对冰箱保温层进行设计并通过实验的方法验证设计方案的可行性,同时根据所测得的数据来确定优化方案,总结出合适的设计参数。关键字:保温材料;硬质聚氨酯泡沫塑料;冰箱保温层AbstractRigidpolyurethanefoamiswidelyusedintheconstruction,petroleum,chemicalindustry,lightindustry,transportandauxiliary,urbanheating,refrigerationandfoodcoldstorageandprocessing:refrigerator,freezer,thefuselageoftheaircraft,shipshell,passengercarriage,theactivitiesoftheboardandthemostexcellentthermalinsulatingmaterials;butalsooftenusedtotakeaboat,floatingbody,aspeedboat,moditypackagingmaterials;passtherigidfoamisagoodsound-absorbing,,hisa,canalsobeother,suchasrockwool,perlite,:bindingofregenerativefoam,crushedafterhotpressingproducts,crushedintopowderasfillerintheproductionoffoam;throughalcoholysis,positionrecycledpolyolsforfoamplastic,,rationresistanceandchemicalstability,&reworkproblem,thispaperintendstoadoptrigidpolyurethanefoamasarawmaterialforrefrigeratorinsulationlayerdesignandfeasibilitythroughtheexperimentalmethodtoverifythedesignscheme,heoptimizationscheme,summeduptheappropriatedesignparameters