The ventilation warehouse is basically the same as the large warehouse, with three types: ground floor, semi-underground and underground. With long-term use of wood, masonry and other permanent construction, it does not require annual demolition and relocation. The ventilation warehouse has a good thermal insulation device, which differs from the warehouse pits in that it has sensitive ventilation equipment. It is to use the air that is constantly getting cold and fresh outside the library to discharge the hot, dirty air inside the store to lower the temperature inside the store. As a result, its cooling performance is better than that of the cellar. Because Tongfeng Reservoir is greatly affected by natural temperatures, it cannot be applied in summer. In the spring and autumn seasons, it is necessary to adjust the temperature in the reservoir by using the night pass phoenix. In winter, the heat insulation cover is needed to prevent frost damage, and sometimes the temperature is increased. Ventilation storage should be built in a well-ventilated area where Tongfeng is good and can quickly reduce the temperature inside the reservoir. It is advisable to extend north and south in the north, which can reduce the direct attack of the cold north wind in winter and avoid freezing the vegetables when the temperature of the reservoir is too low. In the south, it is better to extend in the east-west direction. This will reduce the influence of the western sun and avoid excessive temperature fluctuations in the warehouse. The plane of the ventilated storage is rectangular, and a cold-proof suite should be built at the entrance and exit so that there is a buffer zone inside and outside the warehouse so that the inside of the warehouse will not be directly affected by the external temperature. Ventilation storage must be established into the intake and exhaust. The air outlets are generally located on the top of the library or above the side walls. The air inlet is located in the lower part of the side wall of the storage. Some ventilated storages are ventilated by the natural convection of hot and cold air. In good conditions, the electric exhaust fan is used to force air convection to achieve ventilation. The main management of ventilated storage is to control temperature and humidity. In the early autumn, the amount of ventilation should be increased to quickly reduce the temperature inside the reservoir. As the temperature decreases, the ventilation opening is gradually reduced to reduce the ventilation. When the winter is cold, you should close the air intake and only open the air outlet. In late spring, night ventilation should be strengthened to prevent the temperature inside the warehouse from rising. The principle is the early cooling, medium-term insulation, and late temperature control. As a result of ventilation and dehumidification in a ventilated storage room, the general humidity will not be too large. In order to increase the humidity inside the library, water can be sprinkled on the ground, and the sacks can also be placed at the air inlet to use the flowing air to bring in the evaporated moisture to increase the air humidity. If the humidity in the warehouse is too high, besides strengthening the Tongfeng, moisture can be used to reduce the humidity inside the reservoir. Frequently used ventilated storage warehouses are prone to pests and diseases in the warehouse. Therefore, at the end of storage, they should be promptly cleaned and fumigated with sulphur or sprayed with 0.5% bleach solution.
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