The cleanliness level of a clean room is divided based on the number of dust particles in the air. The smaller the number of particles, the higher the cleanliness level. The highest level is Level 1, and then down to Level 10, Level 100, and Level 1000. Taking Level 10 and Level 1000 clean rooms as examples, what are the differences between different levels of clean rooms?

  Firstly, there is a difference in the number of FFUs. A high cleanliness level clean room requires a large amount of air blowing. The distribution of FFUs in a tenth level clean room is full, which means that the roof of the clean room is covered with FFUs, while the distribution of FFUs in a thousand level clean room is not as dense. Due to the different number of FFUs required, the cost of a Grade 10 clean room is also higher than that of a Grade 1000 clean room.

  Secondly, there are differences in construction. The air volume of a thousand level clean room is not large, and it can be exhausted through the steel return air outlets around it. This type of return air outlet is made of spray coated steel plate, with punched holes on the surface, and is equipped with a detachable nylon mesh in the middle for simple air filtration. The ground material is generally PVC dustproof floor. The air volume of a tenth level clean room is much larger than that of a thousand level clean room, and relying solely on the return air outlet for ventilation is not enough. In order to maintain stable indoor pressure difference, it is necessary to lay an elevated perforated floor and directly return air through the ground. The surface of the elevated perforated floor is filled with small holes, which not only facilitates ventilation, but also prevents dust from personnel's soles from contaminating the clean room, ensuring cleanliness.

  Finally, there are differences in industries. Grade 10 clean rooms can be used for high-tech products with high cleanliness requirements, such as high-precision chips, semiconductors, etc. The use of thousand level clean rooms is more extensive, such as medical equipment, optical equipment, etc.

  The above is the difference between a ten level clean room and a thousand level clean room. The differences between different levels of clean rooms are significant, so before building a clean room, it is necessary to determine the cleanliness required for the final product before designing and constructing it.