Temperature difference: the temperature of ordinary refrigerator is below zero 18 degrees, which is the national standard guaranteed temperature of household refrigerator. Common low-temperature refrigerators are generally divided into -40 degrees, -90 degrees,-1 10 degrees,-130 degrees,-160 degrees and so on. There will be some differences in the temperature division of low-temperature refrigerators produced by various manufacturers. Different uses: ordinary refrigerators are mainly used for household use, which are used to refrigerate and keep fresh food.
The low-temperature refrigerator is mainly used for scientific research, preservation of medical supplies, low-temperature experiments and storage of special materials such as biological products, marine products, electronic components and chemical materials. The refrigeration principle is different: there are two kinds of ordinary refrigerators: gas absorption type and semiconductor type. The refrigeration system of low-temperature refrigerator adopts the working principle of a new generation of single compressor automatic cascade refrigeration technology. Generally, two compressors are used as high and low temperature compressors. In addition, it is worth noting that medical refrigerators and household refrigerators also have requirements for temperature fluctuation and uniformity in refrigerators. For example, there is too much food in the household refrigerator, and the refrigerator cannot maintain the freezing and refrigerating effect; However, blood refrigerators have this requirement. At the ambient temperature of 16℃ ~ 32℃, no matter how many blood bags are stored in the refrigerator, the temperature difference in the refrigerator should not be greater than 2℃ within 60 seconds of a door opening time. Refrigerator is one of the commonly used equipment in medical institutions and scientific research institutions. The choice of refrigerator is directly related to the safety and effectiveness of clinical examination and clinical blood use. If the medical samples, reagents and blood are stored in household and commercial refrigerators, there are great hidden dangers. Hospitals will also choose medical medicine freezers, medical blood freezers and medical freezers according to different purposes, which means that ordinary household and commercial refrigerators cannot replace medical freezers, which is the difference between them.