Study On Integer Efficiency Testing System And Efficiency Scanning Testing System For HEPA Filter & ULPA Filter Base On European 1822 Standard

Along with the development of the modern electronic industry, the controlling for airborne particles in the cleanroom become very strict, so the air filters estate confronted with gigantic opportunity and challenge.Now sodium flame and oil fog method, as home current standard to test the performance ofhigh efficiency particulate air (HEPA) filter, can not satisfy the needs of actual development because of various defects. Therefore, it is necessary to study on new performance testing system of HEPA filters to solve the domestic lagged conditions of the testing method for HEPA filters, referring to the related international testing standards of HEPA filter.This efficiency testing system is referring to the European standard (EN1822) for HEPAfilter testing and other standards, ex. Japanese and American standards, two filterperformance testing platforms composed of overall efficiency testing system and scanning system are designed and built. This system can successfully realizes the testing of the most penetrating particulate size( MPPS) efficiency and part efficiency. Because the automatic of HEPA testing in foreign country is higher than that in our country. Our purpose is to research and empolder a set of auto-testing system to test HEPA with roboticized equipment such as step motor, which can simplify the operating, shorten the testing period, heighten the testing precision, reduce the cost for air filter firms and improve the efficiency of HEPA testing.Based on prehominid's achievement this syetem designed new scan machinery structure dan scanning programme.The thesis mainly introduce the process of creating the testing system,the selecting of equipment and the process and the design of automatic controlling system Through the study of new HEPA filter performance testing system, some beneficial data information is obtained. The accomplishment of this testing system furnishes a set of facilitative instrument for the filter companies of our country. This thesis has some guiding meaning to the design and manufacture of the newly-built filter-testing system.