How to extend the service life of cold storage

How to extend the service life of cold storage

We all hope that our cold storage can last longer. How can we achieve this effect? We will discuss with you in detail in terms of usage habits and maintenance:

　　 One, usage habits

　　 1. The cold storage is installed or used again after long-term use, and the cooling rate should be reasonable: it is advisable to keep it at 8-10℃ every day, and keep it at 0℃ for a period of time.

　　2, cold storage board maintenance, pay attention to the collision and scratching of hard objects on the storage body during use. Because it can cause depression and corrosion of the library board, it will seriously reduce the local insulation performance of the library body.

　　3. Maintenance of the sealing parts of the cold storage. Since the assembled cold storage is made up of several insulation boards, there are certain gaps between the boards. These gaps will be sealed with sealant during construction to prevent air and moisture from entering. Therefore, in use, repair some parts where the seal fails in time.

　　4. Cold storage floor maintenance. Generally, the floor of small prefabricated cold storage uses insulation boards. When using the cold storage, you should prevent a large amount of ice and water on the ground. If there is ice, you must not use hard objects to beat it during cleaning to damage the ground.

　　 2. Maintenance of cold storage

　　 1. Mold removal and disinfection of cold storage

　　Cooking materials and foods refrigerated in cold storage have certain fat, protein and starch. The presence of these nutrients will make molds and bacteria multiply and grow.

　　 In order to do a good job in refrigeration hygiene management and ensure the quality of refrigeration of food and cooking ingredients, it is necessary to conduct refrigeration sanitation and disinfection work on a regular basis.

　　 To remove mildew, mildew and disinfect the cold storage, use acid disinfectant first. The bactericidal effect of acid disinfectants is mainly to coagulate the protein in the bacteria. Common disinfectants include lactic acid, peroxyhexanoic acid, bleaching powder, formalin and so on.

　　2, the method to eliminate odor in the cold storage

　　1) Causes of peculiar smell in cold storage

The so-called peculiar smell, that is, the cooking ingredients and food in the cold storage under the influence of external factors, through physical and chemical changes, produce an abnormal smell. Over time, this smell will adhere to the walls, ceilings, equipment and tools of the cold storage. on. The peculiar smell in the cold storage is generally due to the following reasons:

　　 There is a peculiar smell in the cold storage before the food is imported.

　　 Before entering the cold storage, food has spoilage, such as spoiled eggs, meat, fish, etc.

　　 The cold storage where fish has been stored, and the food such as meat, eggs, or fruits and vegetables is stored without washing, causing the smell to become infected and deteriorate.

　　The cold storage is not well ventilated, and the temperature and humidity are too high, causing molds to multiply and produce a moldy odor.

　　The leakage of the refrigeration pipe of the cold storage, the refrigerant (ammonia) corrodes into the food and causes the peculiar smell.

　　The temperature in the cold storage does not drop, causing the meat to deteriorate and spoil and produce a spoiled smell. This situation mostly occurs when fresh meat is not frozen or completely frozen and then transferred to storage.

　　Different odor foods are stored in a cold storage warehouse, causing food odors to infect each other.

　　2) Methods to prevent the odor of cold storage

　　Foods that are put in the cold storage must be inspected, and only those that have not deteriorated can be put into storage.

　　 The cold storage warehouse must not have any peculiar smell before the purchase. If there is a peculiar smell, it must be processed by technology to eliminate the peculiar smell before use. It is usually necessary to strengthen the maintenance of refrigeration equipment, and it is strictly forbidden to dump and unload goods to prevent damage to the pipeline and cause refrigerant leakage. During the cold processing of food, the cold storage warehouse must be kept at a certain temperature, and frozen food must not be transferred or stored. If the temperature in the cold storage room cannot drop, the cause should be found, and food processing should be carried out after troubleshooting.

　　 Do not mix and store mutually infected foods in the cold storage.

　　3) How to remove peculiar smell in cold storage

　　 Ozone method. Ozone has a strong oxidizing effect, which can not only eliminate the peculiar smell of the cold storage warehouse, but also prevent the growth of microorganisms. The ozone generator can be used to eliminate the peculiar smell of the warehouse.

　　 If foods with a lot of fat are stored in the cold storage, ozone treatment should not be used to avoid fat oxidation and rancidity.

　　 Formaldehyde method. Remove the goods from the cold storage warehouse and use 2% formaldehyde solution (ie formalin solution) for disinfection and odor removal.

　　 Vinegar method. The cold storage warehouse where the fish was installed has a strong fishy smell. It is not suitable to load other foods, and other foods can only be loaded after thorough cleaning to eliminate fishy smell. The general method to remove fishy smell is to use vinegar.

The specific method is as follows: After the fish leaves the cold storage, remove the frost layer on the evaporation tube group and keep the temperature of the warehouse below 50℃, and then use 50-100 grams of vinegar for each cubic meter volume of the cold storage. The sprayer sprays into the warehouse, first close the warehouse door tightly, and turn on the blower intermittently to let the vinegar volatilize and flow in the warehouse, so that the vinegar can absorb a lot of fishy smell. Generally, the door of the cold storage is opened after about 4-24 hours, and the vinegar smell can be blown out of the storage with continuous blast for several hours.