The food clean workshop needs to meet the air purification standard of class one hundred thousand.The construction of clean workshops in food factories can effectively reduce the deterioration and mildew of the produced products, extend the shelf life of food and improve the production efficiency. Also called clean workshop dust-free workshop, clean room, clean room, refers to the certain space within the scope of the particles in the air, bacteria and other harmful air pollutants, and the indoor temperature, cleanliness, interior pressure, air velocity and air distribution, noise, vibration and lighting, static control within the scope of a certain demand, and the special design of the room.That is, no matter how the external air conditions change, the indoor can all maintain the original set requirements of cleanliness, temperature and humidity and pressure performance characteristics. What is one hundred thousand grade clean workshop?In simple terms, the number of particles with a diameter of ≥0.5μm per cubic meter of air in the workshop is not more than 3.52 million. The less the number of particles in the air, the less the number of dust and microorganisms, the cleaner the air is.The 100,000-grade clean workshop also requires that the ventilation of the workshop should reach 15-19 times per hour, and the air purification time after complete ventilation should not exceed 40 minutes.