我国冷库多采用稻壳作为隔热材料。因它可就地取材、价格便宜且隔热性能好。但是它也存在一些不足之处;一是有些地方采购困难,需要到很远的地方采购。有些地方稻壳的价格已不是过去的每立方米四、五元,而是一斤就要一角多。再加火车、汽车运输以及包装用麻袋等费用,单方造价有的已达十几元钱。二是稻壳为易燃材料,由于建设冷库时需提前采购运到厂内存放,有时存放数月或更长的时间,这样除防雨外还担心失火。即使填入冷库墙,顶内,从对冷库设计日益严格的防火标准要求看,其易燃性也是一个很大的弱点。 China’s cold storage uses rice husks as insulation material. Because it can be sourced locally, it is cheap and has good thermal insulation properties. However, it also has some deficiencies; First, it is difficult to purchase in some places and it needs to be purchased far away. In some places, the price of rice husk is not four or five yuan per cubic meter in the past, but a pound is more than a dime. Plus the cost of trains, automobiles, and sacks used for packaging, and some of the unilateral costs have reached more than ten yuan. Second, rice hulls are flammable materials. Because they need to be purchased and transported to the factory for storage before they are built, sometimes they are stored for months or longer, so that they are afraid of catching fire in addition to rain. Even if it is filled in the cold storage wall and inside the roof, the flammability of the cold storage is also a great weakness from the point of view of increasingly stringent requirements for the design of cold storage.