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Composition of commercial refrigeration (2)
Composition of commercial refrigeration
(5) commercial refrigeration Frozen storage room: also known as low-temperature cold storage room, the room temperature is -18~-25℃, the relative humidity is 95%~98%, used for comparison Store frozen food for a long time. In some foreign countries, the temperature of frozen food storage rooms has a tendency to drop to -28~-300℃. Japan also uses the so-called ultra-low temperature storage rooms of -45~-50℃ for frozen tuna.
(6) Modified atmosphere preservation room. Modified atmosphere preservation is mainly for the storage of fruits and vegetables. After the fruits and vegetables are harvested, they still maintain a vigorous life activity. Respiration is the most obvious manifestation of this life activity. Within a certain range, the higher the temperature, the stronger the respiration and the faster the aging. Therefore, cooling methods have been used in production for many years to extend the storage period of fruits. At present, the storage of controlled gas components is being developed at home and abroad, referred to as CA storage , that is, appropriately reducing the oxygen content and increasing the carbon dioxide concentration in the fruit and vegetable storage environment to inhibit the respiration strength of the fruit, delay the maturity, and achieve the purpose of extending the storage period. In general, the gas composition is controlled as follows: oxygen is 2% to 5%, and carbon dioxide is 0 to 4%. There are two methods to control the gas composition, the natural oxygen reduction method and the mechanical oxygen reduction method.
(7) Ice making room. Its location should be close to the equipment room. Aquatic commercial refrigeration often places it on the top layer of multi-layer commercial refrigeration to facilitate the output of ice cubes. The ice-making room should have better lighting and ventilation conditions, and the convenience of ice cubes in the cabinet or output should be considered. The indoor height should take into account the convenience of the operation of the ice lifting equipment, and the drainage should be unblocked to avoid indoor water accumulation and excessive humidity.
(8) through the hall. The hallway is a passage for food to enter and exit, and it plays a role in communicating the cold rooms and facilitating loading and unloading turnover. There are two types of tunnels in the cabinet: low temperature tunnels and medium temperature tunnels, which are used in high and low temperature cabinets. At present, in commercial refrigeration, the room temperature outside the cabinet is mostly used, and the hall is arranged in a room temperature environment with good ventilation conditions, which improves the operating conditions of the workers and can also extend the service life of the hall. The building structure of the room temperature tunnel is generally separated from the cabinet structure.
(9) Other. Such as elevator room, selection room, packaging room, distribution room, by-product refrigerated room, defective product refrigerated room, staircase, etc.
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