Common types of fruit and vegetable storage
With the rapid development of logistics technology, the introduction and application of foreign advanced refrigeration technology and new insulation materials, the construction technology of China's cold storage has been greatly developed. In the investment construction, the initial investment cost should be considered according to different regions and conditions. The operating cost in use, thereby reducing the energy consumption of the fruit and vegetable storage, and building a more economical and rational storage of fruits and vegetables. Reducing the energy consumption of fruit and vegetable storage, not only in the design of reasonable refrigeration systems, electrical systems, strengthening scientific management and the use of new equipment, high-tech, etc., energy-saving design of fruit and vegetable storage is also very important.
1 Types of fruit and vegetable storage
At present, there are three main forms of construction of fruit and vegetable fresh-keeping warehouses: one is the construction of soil and vegetable fresh-keeping warehouses constructed with blocks and reinforced concrete structures and thermal insulation; the second is the type of light-steel structure-mounted fruit and vegetable storage; the third is civil or steel-concrete structure. Add a type of fruit and vegetable storage. The specific type can be determined mainly according to different regions, geographical environment, investment cost, operating cost and other factors.
1.1 Soil and vegetable preservation store
In the form of fruit and vegetable fresh storage, the single-layer fruit and vegetable fresh-keeping warehouse adopts beam-and-plate structure, and the multi-layer fruit and vegetable fresh-keeping warehouse adopts the form of flawless floor structure. The main body of the wall, column and floor of the fruit and vegetable fresh-keeping warehouse is made of block and reinforced concrete structure. The inner side of the wall of the fruit and vegetable fresh-keeping warehouse is pasted with insulation layer. The two sides of the insulation layer need to be made of moisture-proof vapor barrier layer, and the inner side is made of civil construction protection layer. The insulation material of the fruit and vegetable fresh-keeping warehouse is developed from rice husk, softwood and polystyrene to polyurethane spraying. The moisture-proof and vapor-proof material has eliminated the practice of petroleum asphalt linoleum, and the use of polyurethane waterproof coating and polyethylene film on-site paving. The enclosure structure of the soil and vegetable fresh-keeping warehouse is a heavy-duty structure with large thermal inertia. The temperature fluctuation caused by the outside air temperature and solar radiation is small, and the storage temperature is relatively stable. The advantages of civil engineering fruit and vegetable storage are strong, high load bearing, good fireproof and durable; the disadvantages are long construction period, heavy weight, high geological conditions, more columns in the fruit and vegetable preservation warehouse, affecting the stacking of goods and reducing the preservation of fruits and vegetables. Effective use volume of the library
Different from Europe and the United States, due to limited land, large cities are still large enough for multi-layered fruits and vegetables, which are reinforced concrete structures. According to the design specification of China's fruit and vegetable fresh-keeping warehouse GB50072, the heat flux per unit area of ​​the outer protective structure of the fruit and vegetable fresh-keeping warehouse is generally controlled at 10W~12W/m. In order to reduce the heat transfer capacity of the envelope structure. Many countries suggest that the insulation layer should be properly thickened. When designing insulation in France, the former Soviet Union, Japan, etc., the heat flux has been chosen to be 6.98W 8.14w/m.
1.2 Light steel structure plus assembled fruit and vegetable fresh storage
With the development of light steel structure and the needs of modern logistics, large-column net and large-span steel structure assembled fruit and vegetable fresh-keeping warehouses have developed rapidly. The fruit and vegetable fresh-keeping warehouse adopts light steel structure such as steel column and steel beam, and the heat preservation adopts prefabricated library plate on-site splicing. There are two structural forms between the light steel structure and the thermal insulation board: one is the outer structure. The other is an internal structure. The light steel load-bearing structure is on the outside of the insulation board and is called the outer structure, and vice versa. The outer structure has less steel than the inner structure. In order to reduce the radiant heat of the sun, the roof is provided with a roof made of corrugated pressed steel sheet and hangs about 1.5 meters, and there is at least 600 mm of air layer between the insulation layer. The domestic use of external structure, mainly considering the structure and floor insulation treatment; while the foreign use of the internal structure, the structure and the floor using the technical measures of insulation blocks lll.
The above articles are from the Ou Xue fruit and vegetable preservation store, Shenzhen cold storage, cold storage, small cold storage, low temperature cold storage, freezer. For details, please visit: Fruit and Vegetable Storage Library http://
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