What kind of chain is a cold chain?

Original title: What exactly is a cold chain?
, China Digital Science and Technology Museum, "Sister is coming" special release "Cold chain is what kind of "chain"? , the cold chain logistics epidemic prevention and control knowledge of science.
What is a cold chain
Cold chain refers to certain products in the process of processing, storage, transportation, distribution and retail, use, all links are always in the product necessary to reduce losses, prevent pollution and desotente, to ensure product safety of the special supply chain system.
chain has been deeply integrated into people's lives, it can be said that all aspects of our lives and cold chain is inextricably linked. This "chain" applies to a wide range of applications, including primary agricultural products, processed foods, special commodities (e.g. medicines, vaccines), etc. Of course, one of the most intimate intersection with life is cold chain food, refrigerated frozen food in cold chain logistics is always in the prescribed low temperature environment, can ensure food quality, reduce food loss.
the use of cold chain logistics to transport food, than the general storage period of ordinary refrigerated food one to several times longer, through the circulation link to control the temperature, can effectively reduce microbial growth and food corruption. At the same time, in the process of cold chain logistics, through the gas regulation method, inhibit the breathing state after fruit and vegetable picking, so as to achieve the effect of fruit and vegetable preservation. It can be seen that cold chain logistics plays an important role in improving our quality of life and convenience.
, what is the core magic weapon of cold chain logistics? Where is the key to its value?
First, one of the core components of cold chain logistics is "temperature control insulation", which includes a constant temperature and humidity cold storage with precise requirements for the humidity temperature of stored items and a "air conditioning cold storage" that plays the role of air conditioning preservation.
The so-called air conditioning preservation, that is, the concentration of oxygen in the air from 21% to 3% to 5%, on the basis of cold storage, add a set of air conditioning system, the use of temperature and control oxygen content of the two aspects of the joint role, to achieve the breathing state after fruit and vegetable harvest.
, cold chain storage is also an essential component, generally used in fresh agricultural products.
is cold chain transmission. At a certain temperature, through the use of the required transmission machinery and equipment, utensils, etc., to achieve the classification of fresh agricultural products selection, packaging.
is cold chain loading and unloading, which is very important and difficult to operate a step. Refrigeration and freezing of items should be sealed on the unloading vehicles and unloading warehouses to ensure that the temperature rise of items during unloading is controlled within the permitted range. When the unloading operation is interrupted, the transport equipment compartment door should be closed immediately to keep the refrigeration system running normally.
is cold chain transportation, which is an important link in cold chain logistics. Cold chain transportation costs are high, including more complex mobile refrigeration technology and insulation box manufacturing technology, cold chain transportation management contains more risks and uncertainties.
to make the whole process of cold chain logistics automatic and efficient operation, it is inevitable that the use of information technology, that is, the information control of cold chain. Information technology is the nervous system of modern cold chain logistics, through the support of the system information platform, it is easy to realize the strategic co-management of all the resources of enterprises, reduce the cost of cold chain logistics, improve the market competitiveness and management level of cold chain logistics enterprises.
cold chain food still be eaten?
generally speaking, the lower the temperature, the longer the virus survives. In an environment of minus 20 degrees Celsius, the virus can survive for months, even if it is transported in a normal cold chain. If contaminated items, including food or packaging, are transported through cold chains in areas with a high risk of outbreaks, the virus can be brought to non-epidemic areas, causing contact transmission.
no new coronavirus infections caused by direct consumption of cold-chain foods have been detected. Neo crown virus is a respiratory virus, mainly transmitted by respiratory droplets and close human contact, the possibility of infection through the digestive tract is very low. From the epidemiological traceability analysis, the infected population is a high-risk group, such as porters, who are repeatedly exposed to the outer packaging of imported cold-chain foods under certain circumstances.
experts have said that China has entered the normal stage of prevention and control of the new crown pneumonia epidemic, do not have to panic about the recent cases in several areas. However, it should be emphasized that winter for the new coronavirus relying on cold chain logistics to spread the more appropriate environment, so "anti-human also need to prevent things."
in the "anti-material" aspect, cold chain inspection and quarantine is a special need to pay attention to the link. To establish a standardized and orderly food inspection and quarantine work, arrange for the management of large transport volume, distance and high probability of pollution of the transport work, do a good job of routine cleaning, disinfection and other sanitary treatment, and implement the cold chain logistics real-time monitoring and temperature recording work, to ensure that the quality of food in the transport process in line with the requirements, to ensure food safety and hygiene imports. (Reporter Wang Jia)