Requirements for supporting cold storage in clean room workshop? -common problem
Requirements for supporting cold storage in clean room workshop?
The temperature of the refrigerated storage room is higher than 0℃, that is, the temperature slightly higher than the freezing point of the food. It is mainly used for vegetables, fruits, eggs, dairy foods, and also suitable for short-term fresh-keeping and storage of fish, meat and other foods; frozen storage The temperature is generally below -18 ℃, the relative temperature is 96%-100%, in this...
Text label: Clean room supporting cold storage, clean workshop cold storage requirements
Requirements for supporting cold storage in clean room workshop?
The temperature of the refrigerated storage clean room modular is higher than 0℃, that is, the temperature slightly higher than the freezing point of the food. It is mainly used for vegetables, fruits, eggs, dairy foods, and also suitable for short-term fresh-keeping and storage of fish, meat and other foods; frozen storage The temperature is generally below -18 °C, and the relative temperature is 96%-100%. At such a low temperature, the oxidation of fat in food, the decomposition of protein, the effect of enzymes and microorganisms all become very slow, so frozen food The period is longer; because the requirements for refrigeration and freezing are different, and different foods have different requirements for storage temperature, the cold storage has different temperature requirements for different cold rooms. The refrigerated food taken out of the cold storage room should be prevented from condensation or frost on its surface. This is because when the dew point of the air is higher than the surface temperature of the cooled food or packaging material, the water vapor in the air will freeze when the food is cold. When the surface temperature is lower than 0°C, frost will form on the surface of the food, which will affect the quality of the product and facilitate the growth and reproduction of microorganisms; Condensation or frost. For a cold storage with a closed platform, when there is a refrigeration device to keep the temperature of the platform at 5-7 °C, condensation will generally not occur when the cooled food is taken out of the cold room.
The clean clean room modular is equipped with a cold storage, and the cold storage door should have good heat insulation and air tightness to reduce the loss of cooling capacity; the door frame should be dew-proof and anti-freezing, such as electric heating device should be installed at the contact part between the door and the door frame; strong and durable, can resist impact ; The door is strong and light, and the switch is flexible; there is a safety light, and the operator is locked in the warehouse with a call and self-opening device; the size of the door opening should facilitate the entry and exit of goods and loading and unloading operations, and the door should open a small door on the main door, In order to solve the problem that there are often small items entering and leaving the warehouse, it is convenient and energy-saving; the floor at the entrance and exit of the cold storage should prevent the occurrence of 'cold bridgesAfter the cold storage door is opened, it will cause the exchange of cold and hot air flow inside and outside the cold storage, and the heat and humidity load outside the storage will invade into the storage, resulting in the loss of cooling capacity of the cold storage. Dripping water, which in turn freezes the ground, is detrimental to stock food quality and transportation. The measures to prevent the intrusion of heat and humidity loads and reduce the loss of cooling capacity after the cold storage door is opened are to configure the door curtain and door bucket, and install an air curtain above the cold storage door. Zhongjing Global Purification can provide consulting, planning, design, construction, installation and other supporting services for clean rooms and cold storage.
Clean room cold storage door curtains are generally hung on the inside of the cold storage door and close to the cold storage door. In the early days, cotton door curtains were often used, which were heavy and unsanitary, blocked sight lines and were easily damaged. They were gradually replaced by transparent soft plastic door curtains. The function of the door curtain is to block The heat and moisture exchange inside and outside the cold storage door reduces the loss of cooling capacity. Air curtain, the air curtain blown by the blower nozzle blocks the heat and moisture exchange of the air inside and outside the cold storage door
, which not only facilitates the entry and exit of loading and unloading operators and machinery, but also reduces the cooling loss of the cold storage. The blower of the air curtain is installed above the cold storage door and blows a curtain-like airflow downward. Due to the effect of the wind speed and the angle of the nozzle , forming an air curtain at the door of the warehouse, and finally dispersing to the outside of the warehouse; the blowers used in the air curtain are usually axial-flow and cross-flow fans. The door bucket is located on the inner side of the cold storage door. Its width and height are about 3m, which are suitable for the width of the cold storage door and the length of the forklift. The height is slightly higher than the door frame of the cold storage. The floor of the door bucket should have electric heating measures to prevent the dripping water from freezing. The space of the door bucket becomes a transition area inside and outside the cold storage, reducing the convection of cold and hot air and the exchange of heat and humidity inside and outside the storage.
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