Cold storage Introduction.air humidifier Processing

　　Cold storage common sense and humidity and humidity knowledge cold storage houses are a place for storing fresh -keeping agricultural products. Its role is to maintain the stability of the low -temperature environment, and usually refer to the insulation performance as insulation. The good thermal insulation structure of the cold storage house can maximize the cold volume created by the cold storage unit in the cold storage. On the other hand, it is to reduce the leakage inside the cold storage in the cold storage. This is also the main difference between the cold storage and the general house Where.

　　Cold storage is mainly used for food, medicines, and mechanical freezing processing and refrigeration. It maintains a certain low temperature indoor through artificial refrigeration. The walls, floors and flat tops of the cold storage building have a certain thickness insulation material to reduce heat transfer from the outside of the cold storage. In order to reduce the absorption of solar radiation energy, the outer wall of the cold storage is generally coated with white or light colors. Therefore, the cold storage building is different from general industrial civilian buildings. It has its own unique structure.

　　The working principle of mechanical cold storage working principles Mechanical cold storage is to storage fruit storage fruits in a good insulation building, equipped with mechanical cold storage units, and according to the requirements of fruit variety to storage temperature, humidity and ventilation, the cold storage system is artificially adjusted by regulating the cold storage system. And control, so the storage time is longer and the effect is better.

　　A. The principle of refrigerating mechanical cold storage. The mechanical cold storage is a liquid (refrigerant) with low gasification temperature (refrigerant), which makes it evaporate at low pressure into gas, thereby absorbing heat and achieving cooling.

　　In addition to the low boiling point, the refrigerant is required to be harmless to human organs, not to corrosion effects on metals, risks without combustion and explosion, and do not chemically react with lubricants. Make a lot of heat, low pressure in the high -pressure condensate system, low viscosity and cheap price.

　　The type and nature of the commonly used refrigerant of cold storage are boiling point (℃) critical temperature (℃) at 0 ° C (liter/gram) ammonia (NH3) -35.5 132.4 301.6 × carbon dioxide (CO2) -78.2 31.1 55.0 × sulfur dioxide (SO2) -10.0 157.2 91.3 × chlorine ally methane (CH2CL) -23.7 143.1 98.8 × Flun (CCL2 F2) -30.0 111.5 37.2 × cold storage refrigerant is most commonly used with ammonia and Flun's refrigeration effect.

　　The cold storage host with the gasification of the cold storage refrigerant -freezing refrigerator, which has two types: compressed and absorbed. And more compressed applications. The main structures of the cold storage compressed frozen refrigerators are; compressors, condenser, evaporation tube and cold fan.

　　B. Management period of cold storage storage period. The suitable temperature of fruit refrigeration varies from varieties. Most of the late-mature varieties should be based on -1-00 ° C. The humidity of the cold storage should be 90%.

　　After the fruit is harvested, it must be cooled as soon as possible (pre -cold to about 0 ° C), and it is best to enter the cold storage within 1-2 days after harvesting. Because the selected fruits delayed at 21 ° C for 1 day, the storage life of 10-20 days will be reduced at 0 ° C. Therefore, after the selection of fruits after the collection -1-0 ° C storage.

　　The management of the cold storage storage of fruits is mainly to regulate the temperature and humidity and gas composition of the control of the cold storage environment. Temperature adjustment is based on different varieties and the requirements for temperature in different periods. The evaporation speed of the refrigerant of the refrigerator is controlled to control the temperature of the cold storage library. The cold storage is often frost because of the cooling pipe system, which hinders the heat from heat, affects the cooling effect, and due to frosting, the humidity in the cold storage library is too low. Therefore, it should be regularly heated to remove frost and spray the cold storage humidity in time. The ventilation of the cold storage should be carried out at night. If the carbon dioxide in the cold storage is accumulated too much, the air purifier can be installed, or it can be absorbed with a 7%alkali.

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