How to choose a suitable air shower for the food processing industry?

When choosing an air shower suitable for the food processing industry, multiple factors need to be considered. Here are some key points:
Cleanliness requirements
Filter grade: The food processing industry has high requirements for environmental cleanliness, and the air shower room should be equipped with high-efficiency filters. Usually, air showers with three-stage filtration systems of primary, medium, and high efficiency are selected. The filtration efficiency of the high-efficiency filter should reach above 99.99% (particle size ≥0.3μm) to ensure that the cleanliness of the air blown out meets the food production standards.
Purification effect verification: Check whether the air shower room has relevant purification effect verification reports or certifications, such as certifications in standards like ISO 14644, to prove that it can meet the cleanliness requirements required for food processing.
Size and space
Personnel flow: The size and type of the air shower room should be determined based on the number of personnel and the frequency of entry and exit in the food processing workshop. If there is a large flow of people, a double or multi-person air shower can be selected to improve the passage efficiency. For workshops with a small flow of people, a single-person air shower room is usually sufficient to meet the requirements.
Installation space: Consider the size of the space at the installation location of the air shower to ensure that the air shower can be installed smoothly without affecting the normal passage and operation of the workshop. The external dimensions of the air shower should match the installation space, and at the same time, sufficient maintenance space should be reserved.
Material and structure
Material: The shell and interior of the air shower room should be made of corrosion-resistant and easy-to-clean materials, such as stainless steel. Stainless steel material has excellent corrosion resistance and hygiene performance, which can prevent equipment from rusting and bacterial growth caused by factors such as humidity, acid, and alkali in the food processing environment.
Structural design: Select an air shower room with a reasonable structure and no hygienic dead corners. The interior should be smooth and flat, avoiding any unevenness or gaps to facilitate cleaning and disinfection. The door should be an automatic sensor door or a mechanical interlock door to ensure the sealing when people enter and exit and prevent unfiltered air from entering the clean area.
Wind speed and shower time
Wind speed: The wind speed of the air shower should be moderate, generally between 25m/s and 35m/s. Excessive wind speed can cause discomfort to people, while too low wind speed cannot effectively remove dust and impurities. The air shower room with an appropriate wind speed can be selected according to the specific environment and hygiene requirements of the food processing workshop.
Air shower time: The air shower time is usually set at about 30 seconds to 1 minute. For some food processing areas with high hygiene requirements, the time of air shower can be appropriately extended, but it should not be too long to avoid affecting the efficiency of personnel passage. The air shower room should have the function of adjusting the air shower time so that it can be adjusted according to the actual situation.
Safety performance
Electrical safety: The air shower room should be equipped with excellent electrical safety performance, such as grounding protection and leakage protection devices, to prevent electric shock accidents. Electrical components should comply with relevant safety standards and regulations to ensure safe operation in a humid food processing environment.
Human body protection: Consider the protective measures for the human body in the air shower room. For instance, the Angle and position of the nozzles should avoid directly blowing onto sensitive areas such as the eyes and face of the personnel to prevent injury. Meanwhile, the internal lighting of the air shower room should be sufficient and free of glare to ensure the safety and comfort of personnel during the air shower process.