The temperature of the refrigerator is relatively low, but the lowest temperature of our daily refrigerator is at minus ten degrees, minus twenty degrees, the temperature is not too low. Some medical environments or research and development needs must be used to very low temperature very low temperature environment, this time the ordinary refrigerator certainly does not apply, so the market on the ultra-low temperature refrigerator. The temperature inside the ultra-low temperature refrigerator can be up to minus 8, 90 degrees, to provide an absolute low temperature environment. So, what are the brands of ultra-low temperature refrigerator?
Ultra-low-temperature refrigerator brands recommended: Sanyo, Haier, Meiling, Pruo Maid, Therm, Thermo Fisher, Aucma and so on are good.
Ultra-low-temperature refrigerator price (price from the network, for reference only)
-86 ℃ ultra-low-temperature refrigerator ￥ 23760
-40 ℃ ultra-low-temperature refrigerator ￥ 35600
-40 ℃ ultra-low-temperature refrigerator ￥ 5400
p>-40 ℃ ultra-low temperature refrigerator ￥ 7128
Antai -60 ℃ horizontal ultra-low temperature refrigerator? Starting Price: ￥ 6500
Ultra-low temperature refrigerator use
1. Physics and biology research
It is well known that many scientific research projects need to be carried out at extremely low temperatures, such as the study of superconductors, biological research. Superconductors are those electrical conductors whose resistance suddenly approaches or even reaches zero at a particular low temperature. According to past research experience, they need to be in a low-temperature state in order to exhibit the characteristics of superconductors, and some of them have superconducting temperatures so low that they are inconceivable; in addition, biology sometimes requires a low-temperature environment. Therefore, the use of ultra-low temperature refrigerator in scientific research is inevitable.
2. Medicine
From medicine, we know that most of the diseases in human body are caused by bacteria or viruses, bacteria and viruses are microorganisms with strong adaptive ability, and the study of microorganisms surviving in cryogenic environments is one of the most important issues in our medicine. Through cryogenic environment research, we can maximize the survival limit of microorganisms to help us deal with diseases and defend people's health. At the same time, the ultra-low temperature refrigerator can also help us to save blood, medicines, etc., greatly extend their use time and increase the hospital's inventory.
Ultra-low temperature refrigerator working principle
Ultra-low temperature refrigerator generally adopts two-stage refrigeration.
The refrigerant of the first stage is R-12 (23.Ooz, 28.349?523g), and the design pressure is 400ppsi at high pressure (1ppsi=6.894?76X10'Pa), and 90ppsi at low pressure.
The condenser of the second stage of refrigeration and the evaporator of the first stage of refrigeration are placed together.
The refrigerant of the second stage is a mixture of R-503 (8.50z) and R-290 (0.70z), and is designed to have a high and low pressure of 300 ppsi. The temperature sensing probe is a thermistor, which displays different temperatures on the panel according to the magnitude of resistance (i.e., the temperature is high or low).
What are the brands of ultra-low temperature refrigerators? Production of ultra-low-temperature refrigerator brand, Haier is more well-known its technology is also relatively high a brand, if you do not know how the other ultra-low-temperature refrigerator brand, it is recommended that you can go to consider Haier. Ultra-low temperature refrigerator belongs to the more professional appliances, and ordinary household appliances will not be the same as the use of demand, so when you buy can not use ordinary household appliances to look at, otherwise it is very easy to have problems or buy back the product is not right.
Tubapu online free of charge for everyone to provide "home decoration offer, 1-4 local decoration company, 3 sets of decoration design program", and decoration to avoid pit strategy! Click on this link:/yezhu/zxbj-cszy.php?to8to_from=seo_zhidao_m_jiare&wb, you can get it for free Oh~