介绍冷库隔热层的相关设计知识：
Introduction of cold storage insulation design knowledge:
由于冷库的库外温度终年高于库内，库外的水蒸气压力高于库内，通过围护结构的渗透终年由外向内进行。
Libraries outside temperature due to cold storage at the age of higher than that of the rolls, water vapor pressure is higher than outside the library of the rolls, penetration through the palisade structure at the age of outside-in.
聚氨脂中的R11气体被空气和水蒸气置换，使聚氨脂受潮。
食品冷库
Polyurethane R11 gas in the air and water vapour displacement, get together ammoniac fat be affected with damp be affected with damp.
日积月累，受潮越来越重，甚至出现水蒸气凝结，使导热系增大，热阻降低，冷库内的冷量损耗增大。
Accumulate over a long period, be affected with damp be affected with damp is getting heavier and heavier, appear even water vapor condensation, leads to increasing series of thermal conductivity and thermal resistance is reduced, the cold cold storage within the loss increased.
为避免和延缓聚氨脂受潮，延长绝热层寿命，有效的方法是在绝热层的热侧作密封处理，也就是形成隔汽层。
To avoid and delay the polyurethane be affected with damp be affected with damp, prolong the life of insulation blanket, effective methods are on the hot side of the thermal barrier sealing treatment, is the formation of vapour layer.
对土建框架结构的冷库而言，专门用沥青和油毡做隔汽层，工期长、造价高，且施工复杂。
For civil engineering structure of cold storage, specially make steam insulation layer with asphalt and asphalt felt, long construction period, high cost, and construction of complex.
简单的办法是对聚氨脂的现场发泡工艺提出具体的规范，利用聚氨脂现场发泡的表现光滑、坚韧且密封效果好的特点。
Simple solution is to the scene of polyurethane foam process put forward concrete specification, using the performance of polyurethane foamed smooth, toughness and good sealing effect.
要求现场发泡时先在墙面上发出薄薄的一层，要求表面光滑无孔隙，然后在此基础上分层发泡，人为地形成多个密封层，有助于延长聚氨脂寿命。
Foam on site with a thin layer on metope, smooth surface, no pore, and then on the basis of the layered foaming, artificially formed multiple sealing layer, helps to extend the life of the polyurethane.
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