What is the relationship between cold storage safety and cold storage board selection

What is the relationship between cold storage safety and cold storage board selection

The choice of insulation materials in the refrigeration system is also very important to the safety of the entire refrigeration system. In fact, the main difference between polystyrene board and polyurethane board is the heat preservation effect, price, technology and material. The thermal insulation effect of polyurethane board is better than that of polystyrene board and the flame retardancy of polyurethane is better than that of polystyrene board. Now the mainstream choice in the market is also polyurethane cold storage board. If the customer has no special requirements, polyurethane boards are generally used. Polyurethane itself is not toxic, but it will produce a pungent smell after burning.

　　 As the market has different requirements for products, high-end polyurethane cold storage board materials have fire and flame retardant grades, B1 polyurethane cold storage board materials cannot burn at all, and B2 grades are extinguished after burning for 5-6 seconds. Generally, B1 grade polyurethane cold storage board materials are used for experimental cold storage installation.

　　 At present, there are two main types of insulation materials widely used in refrigeration systems. One is polystyrene board. Polystyrene board refers to a polystyrene foam sandwich board with colored steel plate as the surface layer, closed-cell flame-retardant polystyrene foam as the core material, and the colored steel plate is pressed by an automatic continuous forming machine It is a high-efficiency structural material made of high-strength bonding. This kind of cold storage board is now less widely used in the market because of its flammability and toxic combustion. Another type is the polyurethane cold storage board widely used in the market. The polyurethane cold storage board uses light polyurethane with good heat insulation performance as the inner material, and the outer splint-type storage board composed of SII, PVC color steel plate and stainless steel plate can reduce Due to the heat transfer generated by the temperature difference between inside and outside, in order to achieve the maximum efficiency of freezing and refrigeration systems, polyurethane rigid foam is currently internationally recognized as the best thermal building material.

　　According to statistics, there are now a large number of cold storage board manufacturers installed in cold storage in my country, mainly concentrated in the Changzhou area, the hometown of warehouse boards, and expanded to all parts of the country. At present, the management of the cold storage board market is being strictly standardized. At present, 80% of China’s more than 500 manufacturing companies do not have a production license. In addition, in the high-end warehouse board market sales, China requires companies to obtain fire protection and flame retardant certification, the lowest level is B2. Many companies have not reached this level of certification. Relatively speaking, there are only a handful of cold storage board companies that have achieved fire and flame retardant grade B1. Relevant departments are now very strict on the production qualification certificate of the warehouse board, which basically belongs to the state of "limited batch".

　　 When talking about the relationship between the safety of the refrigeration system and the cold storage board, the cold storage board can affect the safety of the refrigeration system to a certain extent. In general, large-scale cold storage or cold storage installations such as precision scientific research and medicine are recommended to use cold storage panels with fire-retardant grades, which is beneficial to the safety of the refrigeration system. For example, the choice of cold storage panels in the cold storage is very important. The cold storage is different from ordinary warehouses. The temperature in the cold storage is generally lower, and the air temperature, humidity, and environmental requirements are relatively high. Therefore, when choosing a cold storage board, we must pay attention to choosing a cold storage board with better temperature control. If the selection of the cold storage board is not good, it is difficult to control the temperature in the cold storage, which will easily cause the products stored in the cold storage to deteriorate. Or let the refrigeration compressors of cold storages work frequently, which wastes more resources and increases costs. Moreover, the material of the cold storage board is also closely related to the safety of the refrigeration system. The cold storage board with fire and flame retardant will not burn in the case of a fire in the refrigeration system.