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How to adjust the relative humidity of the fruit and vegetable cold storage room?
The regulation of the relative humidity of the cold storage is not a simple problem, which is related to the moisture content of the fruits and vegetables stored in the cold storage, and indirectly affects the freshness and life activities of the fruits and vegetables. Fruits and vegetables are stored in the warehouse for a long time, and the water will slowly evaporate during the period, which not only reduces the weight of the fruits and vegetables, but also shrinks the fruits and vegetables and affects their commercial value. Therefore, the relative humidity in the fruit and vegetable warehouse needs to be controlled well.
The relative humidity of the fruit and vegetable storage can be adjusted by adjusting the evaporation temperature in the refrigeration system of the cold storage. For example, if you want to adjust the relative humidity of the cold storage at 90%, you can adjust the evaporating temperature of the cold storage refrigeration system to 5-6℃ lower than the storage temperature. If you want to control the relative humidity in the cold storage at 80%, you can adjust the cold storage refrigeration system The evaporating temperature is adjusted to 6~7℃ lower than the storage temperature. When you want to control the relative humidity in the cold storage at 75%, you can adjust the evaporating temperature of the cold storage refrigeration system to 7~9℃ lower than the storage temperature. That is, temperature and relative humidity cooperate with each other and restrict each other.
What are the requirements of cold storage room insulation for maintaining the stability of the temperature in the storage
Cold storage insulation plays an important role in maintaining the stability of the temperature in the storage, reducing the heat load of the cold storage, saving energy consumption and ensuring the quality of food refrigeration storage. Therefore, the walls, floors, roofs and floors of the cold storage should be insulated. In addition to good heat insulation and moisture-proof performance, the heat insulation structure of the cold storage should also have a certain degree of strength, and its floor and floor should have a larger load-bearing capacity. "Cold bridges" should be avoided in the thermal insulation layer to have a long-lasting thermal insulation effect. The inner wall of the heat insulation layer of the cold storage is provided with a protective layer to prevent damage during loading and unloading operations.
Cold storage buildings are different from general industrial and civil buildings. Because of their special low-temperature storage purposes, cold storage buildings must not only solve the problems caused by frozen food production and packaging, but also for some special cold storage, such as air-conditioned cold storage. Solve the problem of air tightness.
In addition, the temperature and humidity of the cold storage environment change, but the environment inside the cold storage is required to be constant. Therefore, the cold storage body always has the problem of alternating cold and hot changes. This is also a problem that needs to be solved during architectural design and construction. In short, cold storage buildings are different from ordinary buildings and require special design, planning and construction.
The basic characteristics of the cold storage building structure The cold storage is a warehouse, therefore, it requires convenient and fast transportation of goods; the cold storage is also a factory and mainly low-temperature production, so the building structure of the cold storage must be able to meet the requirements of the low-temperature production process.