HEPA (Yakakwirira-Kushanda KwezvinhuSefa yemhepo).United States yakatanga boka rebudiriro muna 1942 uye yakagadzira zvinhu zvakasanganiswa zvehuni fiber, asbestos, nedonje.Kukwenenzverwa kwayo kwakasvika pa99.96%, inova ndiyo embryonic fomu yeHEPA iripo.Zvadaro, girazi fiber hybrid sefa bepa rakagadzirwa uye rakaiswa muatomu tekinoroji.Izvo zvakazotemerwa kuti zvinhu zvacho zvine hunyanzvi hwekuteya hunopfuura 99.97% ye 0.3μm zvidimbu, uye yakanzi HEPA sefa.Panguva iyoyo, iyo sefa zvinhu yaive yakagadzirwa ne cellulose, asi zvinhu zvacho zvaive nematambudziko ekushomeka kwemoto uye hygroscopicity.Munguva iyi, asbestos yaishandiswawo sesefa zvinhu, asi yaizogadzira carcinogenic zvinhu, saka iyo sefa zvinhu zveyazvino yakakwirira-inoshanda sefa inonyanya kuenderana negirazi fiber ikozvino.
ULPA (Ultra Low Penetration Air Sefa).Nekuvandudzwa kwemasekete e-ultra-scale akabatanidzwa, vanhu vakagadzira iyo yekupedzisira-yepamusoro-inoshanda sefa ye 0.1μm zvimedu (iyo guruva sosi ichiri DOP), uye kugona kwayo kusefa kwasvika kupfuura 99.99995%.Yakanzi ULPA sefa.Kuenzaniswa neHEPA, ULPA ine yakawedzera compact chimiro uye yakakwirira kusefa kunyatsoita.ULPA inonyanya kushandiswa muindasitiri yemagetsi parizvino, uye hapana mishumo yekushandiswa muzvikamu zvemishonga nemishonga.
Nguva yekutumira: Sep-23-2021