I believe that many friends who use ice bags are concerned about the working principle of ice bags. Because so far, our company has also received many emails about the principle of ice bags. Now we will introduce:

How do ice bags work in the market? In fact, the principle of ice bag is very simple. First of all, ice bag refrigeration is a physical process, which is the mutual transformation of energy between different phases of the material system, not a chemical reaction process. We all know that phase transformation is the transformation between solid-liquid gas three phases, which is often accompanied by endothermic or exothermic and volume mutation. The most common phase change material is water. When the temperature is lower than 0 ℃, water changes from liquid to solid (freezing); when the temperature is higher than 0 ℃, water changes from solid to liquid (melting). In the process of freezing, water absorbs and stores a large amount of cold energy, while in the process of melting, it absorbs a large amount of heat. In the process of phase change, although there is heat exchange with the external environment, its temperature remains unchanged, and the greater the mass of ice, the longer the melting process takes. This is a typical example of phase change materials. Based on this principle, the ice bag with large cold storage capacity is used to maintain the specific stable low temperature of goods during transportation. The above working principle is the ice bag principle.