| 摘要 |
1400519 Electrostatic separators SHIMIZU KENSETSU KK and TOYO KUKI CHOWA KK 15 Nov 1972 [16 Nov 1971] 52684/72 Heading B2J [Also in Division A4] An air purifier comprises a housing 4 provided with inlets 6, 7, an outlet 3 and, a blower 5; a first filter 9, e.g. of synthetic or glass fibres and a metal screen, for removing coarse particles from the air passing through the housing; a second filter 10 in the form of an electrostatic precipitator; ultra violet lamps 13 for sterilising the air; a third filter 14 of metal, e.g. copper wool or aluminium foil, which is earthed to capture any charged dust particles which may leave the precipitator 10; a chemically active filter 15, e.g. of the ion-exchange or catalytic type; and a fifth filter 16 of activated carbon. |
