How cleanrooms minimise contamination
These special rooms minimise the amount of particles per cubic metre of air by using special filtration and airflow systems. They are designed to take the entirety of the environment’s airflow into account and change the air in the room frequently. The cleanroom classification determines which type of filtration (HEPA or ULPA) and airflow systems (laminar or turbulent) are appropriate. A considerable distinction in the two filter types comes down to the size of the particles that can be removed: HEPA filters can eliminate up to 99.97% of pollutants as small as 0.4 microns, and ULPA filters can eliminate 99.99% of pollutants as small as 0.12 microns.
Cleanroom environment attire
在这些房间代表gr工作的人eatest potential source of contamination. Shed skin, dandruff, sweat, and dirt brought in from outside are all possible contaminants. Special garment systems are required that follow specific guidelines, and do not release fibres or other particles themselves. These garments act as a particle filter and barrier between the person working and the cleanroom environment.
根据洁净室分类，空气淋浴器可以在贡献区域和房间本身之间使用。这些封闭的腔室使用高压的HEPA / ULPA过滤空气，在进入房间之前，从人和服装系统中除去污染物（如灰尘，棉绒和污垢）。
我们每天使用的大多数工具 - 就像纸，写作仪器和胶带 - 产生灰尘，可以含有微生物，可以作为导体。在洁净室环境中使用最小化粒子释放的专门认证的工具和书写材料。
Cleanroom-appropriate furniture and cleaning supplies
These rooms are used in plenty of industries, from micro-technology to aerospace engineering. The High Bay Cleanroom at NASA’s Goddard Space Flight Centre is the world’s largest, however, and is where the sensitive instruments for the Hubble Space Telescope are assembled, housed, and tested. A speck of dust or fingerprint could result in a failed mission, so workers must follow strict cleanroom guidelines. They must wear a specialised garment system and pass through a number of chambers that rid them of as many particles as possible: one with a sticky floor to remove dirt from shoes, as well as an air shower. The High Bay Cleanroom also uses an entire wall of special high-efficiency particulate air (HEPA) filters, which circulate one million cubic feet of air every minute.