Cold storage installation and cold storage installation selection

Cold storage installation and cold storage installation selection First, the cold storage installation should pay attention to the following: the type of cold storage 1, according to temperature: A, high temperature cold storage (plus or minus 5 degrees Celsius): suitable for fruit and vegetable preservation; B, medium temperature cold storage (minus 10 degrees-minus 5 degrees): suitable Frozen food cold food; C, low temperature cold storage (minus 20 degrees-minus 10 degrees): suitable for the freezing of frozen aquatic and poultry foods; D, frozen cold storage (minus 23 degrees): suitable for fresh food Quick freezing before cold storage; 2. Safety volume: A, small cold storage: less than 500M3B, ZTE cold storage: 500~1000M3C, large cold storage: more than 1000M3 2. Scaling and main equipment of cold storage in cold storage installation 1. Insulation material and moisture-proof layer A. Storage board: pre-produced, with fixed length, width and thickness, which can be selected according to the needs of storage installation. High and medium temperature cold storage generally use 10 cm plates, low temperature storage and freezing storage generally use 12 cm or 15 cm plates; B, polyurethane spray foam material: this material is sprayed directly in the warehouse to form a non-absorbent, thermal insulation Good polyurethane board, but the cost is higher. C. Polyphenyl ester spray foam material: this material is also sprayed to form polyphenyl ester board, which is more absorbent than polyurethane board and has poor heat insulation, but the cost is lower. D. After the heat insulation material is damp, the heat insulation performance is reduced. Therefore, a moisture-proof layer should be added on both sides of the heat insulation board, or it can be used only as an external moisture-proof layer. The moisture-proof layer is generally made of asphalt, linoleum, plastic coating, plastic film or metal plate. 2. Refrigeration system ; A. Compressor (*key accessory): In general, fully enclosed compressors are used for small refrigerators. Medium-sized cold storage generally chooses semi-hermetic compressors. Large-scale cold storage uses semi-hermetic compressors. The main reason is the Copeland compressor. The small-scale cold storage chooses the fully enclosed compressor. The Copeland scroll compressor is similar to the Copeland ZB series compressor. The large-scale cold storage installation project mainly uses semi-hermetic compressors, namely Shenyang Copeland semi-hermetic compressors. Shenyang semi-hermetic Copeland compressors are mainly produced in Shenyang, but Emerson has built factories and production technologies in China. In addition, some semi-hermetic Copeland compressors are directly imported from the United States into domestic projects for cold storage installations. B. Evaporative cooling: Generally, the high-temperature warehouse uses a fan as the evaporator, which is characterized by fast cooling speed, but it is easy to cause moisture loss of refrigerated food: the middle and low-temperature cold storage use seamless steel pipes as the main evaporator. The characteristic is that the constant temperature effect is good, and the cold storage is timely. C. Condenser: The condenser has air cooling, water cooling and air and water combined cooling methods. The method of air cooling is limited to the application in small cold storage equipment, and the water-cooled condenser can be used in the formed refrigeration system. 3. Other accessories: temperature control machine, door lock, handle, etc. Third, the cold storage construction guide during cold storage installation 1. According to its own use and requirements, select the suitable volume and temperature range of the cold storage; 2. Understand the performance of the main materials and accessories, and be aware of it; 3. Compare the three, choose good quality , Merchants with excellent prices; in particular, choose merchants with good reputation. When purchasing online, you can refer to the corresponding integrity index and the reliability of the cold storage installation and product quality issues in the communication with the merchants, and have the corresponding contractions. Agent product certificate, such as agent certificate or special dealer certificate; 4. Choose an engineering company with construction experience; 5. Design and selection of compressor units installed in mobile cold storage; no matter what brand of compressor unit selection, are It is determined according to the evaporation temperature of the active cold storage and the effective working volume of the cold storage. In addition, the parameters such as the condensation temperature of the frozen or refrigerated goods, the volume of storage, and the frequency of goods entering and leaving the warehouse should be referred to. More importantly, it is necessary to choose a suitable compressor, which cannot be judged by price. Different types of cold storage installations have different compressors. Some may say that Copeland compressors are the most suitable choices, and some cold storage installations Hitachi compression The machine is suitable, and even some cold storages are installed with Taikang compressors. Baifuma compressors, Bristol compressors, etc. are more suitable choices. This requirement for buyers for cold storage has its own advantages and disadvantages. Generally, the calculation formula for the cooling capacity of high-temperature active cold storage is: cold storage volume*90*1.16+positive deviation, the positive deviation is determined according to the condensation temperature of frozen or refrigerated goods, the amount of storage, and the frequency of goods entering and leaving the warehouse, and the range is 100~400W The calculation formula of the cooling capacity of the middle temperature active cold storage is: cold storage volume*95*1.16+positive deviation, the positive deviation range is between 200~600W; the calculation formula of the cooling capacity of the low temperature active cold storage compressor unit is: cold storage volume*110*1.2+ Positive deviation, the range of positive deviation is between 300~800W.