Difference between gas-conditioned storage and cold storage construction?
1. Sealing: gas-conditioned storage compared to the cold storage for the storage body of the airtight and watertight and other requirements are higher.
2. Building materials: gas-conditioning warehouse must use high-pressure continuous foaming machine to make out of the metal surface polyurethane sandwich composite panel as the wall and roof insulation materials, in order to ensure that the high-pressure difference in the state of the library of the sealing requirements. Traditional cold storage can be used in brick structure spray polyurethane insulation layer or semi-automatic metal-faced polyurethane sandwich panel splicing and caulking in the joints and continuous foaming machine produced by the automatic metal-faced polyurethane sandwich composite board three types of storage body composition. High-pressure continuous foaming machine produced by the metal-faced polyurethane sandwich panel foam and density of uniform arrangement, high rate of closed cell, good strength, good flatness between the board and the board, similar to the ancient Chinese mortise and tenon structure splicing of the male and female port connection to ensure the sealing at the same time, but also a perfect solution to the temperature difference between the inside and outside of the warehouse, gas pressure difference caused by the thermal expansion and contraction of the wall and roof materials expansion coefficient of the inconsistent problem, and at the same time, to solve the cold bridge problem, it is the ideal solution to the problem. Solve the problem of cold bridge, is the ideal air-conditioning storage and cold storage library body material, but the price is relatively high, at present the basic use in the air-conditioning library and large cold storage, small and medium-sized cold storage or use the traditional brick spray polyurethane insulation and semi-automatic handmade metal polyurethane panels more.
3. The work of the library equipment is different: cold storage equipment requires only three systems can be composed of, 1. refrigeration equipment system; 2. piping connection system; 3. lighting and temperature control program; but gas-conditioning library equipment required mainly in the following areas: 1. refrigerator, humidifier system, 2. ethylene, carbon dioxide, oxygen detection system. 3. carbon dioxide, ethylene removal machine. 4. piping connection system; 5. lighting and system control program. and system control program.
Overall, the gas-conditioning storage than cold storage for the enclosure plate requirements, the sealing requirements of the storage body is high, while the use of equipment is also more, which is why the cost of gas-conditioning storage is higher than that of cold storage. But not all vegetables and fruits are suitable for gas-conditioned storage.
In use, the difference between gas-conditioned storage and cold storage is as follows:
1.? Gas-conditioned storage time is longer, generally 0.5-1 times longer than ordinary cold storage .
2. Compared with the cold storage, gas-conditioned storage of fruits and vegetables freshness and crispness better;
3.? The shelf life of fruits and vegetables can be extended by 21-28 days after gas-conditioning storage, and the shelf life of ordinary cold storage is 3-7 days;
4. Gas-conditioned storage is a low-oxygen environment, which can inhibit the growth of mold and pests, and maximize the retention of fruit and vegetable integrity;
5.? Not all fruits and vegetables are suitable for air-conditioning and cold storage, but air-conditioning and cold storage in conjunction with the majority of fruits and vegetables can meet the storage needs. For example, dates and kiwi are not suitable for cold storage, but suitable for air conditioning, strawberries, blueberries and other berries, mushrooms are neither suitable for cold storage nor air conditioning. Take white mushroom as an example, nitrogen-filled sealed white mushroom at 25 degrees room temperature 5.5 days the color began to yellow, and vacuum-packed white mushrooms began to yellow in 3 days, and with the porous bag is 5 days began to yellow, which is why most of the white mushrooms on the market with the porous bag packaging reasons, no matter whether it is air-conditioned storage or cold storage, and not the more expensive is the better, suitable for their own agricultural products is the most reliable! The most reliable is the one that suits your own produce.