We often hear engineering brothers in the electronics industry talk about their clean room, and we also hear surgery doctors talk about sterile isolation rooms, so what's the difference between them?

In any case, first of all, one thing is certain, that is, whether it is a clean workshop or a sterile workshop, they are all clean workshops. Let's talk about the concept of clean room first:

A clean room refers to a space with good airtightness that controls its internal air cleanliness, temperature, humidity, pressure, noise and other parameters as needed. There are many types: non-unidirectional flow clean rooms (previously often referred to as turbulent flow clean rooms), unidirectional flow clean rooms (unidirectional flow clean rooms are characterized by parallel streamlines, flowing in a single direction, and in The wind speed on the section is the same, there are vertical one-way flow clean rooms, horizontal one-way flow clean rooms, etc.) and vector clean rooms: supply air at the upper corner of the side of the room, and set the return air outlet at the lower part of the other side, and combine them according to the requirements of use. , such as a mixed flow pattern that combines unidirectional flow and non-unidirectional flow to achieve a high level of clean room in a local area (unidirectional flow section). Here is a concept: the clean environment serves the production process, and the clean room design must meet the environmental requirements of the production process, but the higher the better, the parameter requirements should be reduced as much as possible without affecting the normal operation of the production process. Area, floor height, temperature, humidity, cleanliness, etc. should be high or high, low or low. Control the purification area, reduce the scope of high-level clean areas, and strictly control the level of 100-level and higher one-way flow clean areas. area, control focus. Good steel is used on the blade.

Regarding aseptic and sterile rooms: the diameter of bacteria is generally more than 5 microns, and the air filter in the clean room can reach 99.99% efficiency at a particle size of 0.5 microns. Bacteria are generally attached to dust, so clean room use High-efficiency air filters can achieve the purpose of sterilization, and some sterile rooms can enhance the sterilization effect by using ultraviolet lamps to emit ultraviolet rays for more than 30 minutes. Generally speaking, the standard of the sterile room is the 100-level standard, that is, the average number of bacteria on the plate in the clean area should not exceed 1 colony. The sterile room is generally small in area, about 5 square meters, and the indoor elevation is about 2.5-2.8 meters. The most difficult control requirement in the sterile room is how to maintain the sterile state, so the ability to control bacteria and the stability of bacteria control are the core indicators of the sterile room. Thorough sterilization on the one hand and prevention of contamination on the other hand are two aspects of aseptic technology. It is also necessary to prevent the microorganisms under study, especially pathogenic microorganisms or genetically engineered microorganisms that do not exist in nature, from escaping from our experimental containers to the external environment. At present, sterile rooms mostly exist in microbiological factories, while general laboratories use ultra-clean benches. The main function of the ultra-clean bench is to use the laminar air flow device to remove various tiny dusts including microorganisms on the work surface. Through the electric device, the air enters the work surface after passing through the high-efficiency filter device, so that the work surface is always kept under the control of flowing sterile air.

Regarding dust-free and clean-room: the level of clean-cleaning is mainly based on the number of particles with a particle diameter greater than the division standard per cubic meter of air. That is to say, the so-called dust-free is not 100% without a little dust, but controlled in a very small amount of units. A clean room refers to the removal of particulates, harmful gases, bacteria and other pollutants in the air within a certain space, and the indoor temperature, cleanliness, pressure, airflow speed and airflow distribution, noise and lighting, and static electricity are controlled within a certain range. Specially designed rooms within the range of needs.

Clean technology has developed rapidly in the past 20 years, and clean room of various scales and levels are more and more widely used in various industries, especially in electronics, precision machinery, aerospace, food, cosmetics, medical, biopharmaceutical and other industries. It plays an important role and has made important contributions to improving product quality and developing high-tech products. The so-called clean rooms and sterile rooms are Clean Room in English, and they are just clean rooms. It's just because the application industry is different, the focus is different. Of course, because of the different focus of the application, the details of the design in the clean room are still different. You need to pay special attention at the beginning of design and construction. For example, anti-static is very important in the electronics industry, and UV lamp sterilization is more common in pharmaceutical companies.

In fact, clean technology is actually not difficult, the difficulty is daily use and maintenance. If the design is correct and reasonable, and the construction quality is high, but the operation and maintenance management is unscientific and not strict, the air cleanliness of the clean room will gradually decrease, causing many indicators in the actual production environment to deviate from the specified requirements. The quality is degraded or even substandard. This part requires the joint maintenance of all personnel.