Device for treating air for purifying and dehumidifying air in space being treated for reducing pressure to level below pressure of environment esp. during repair work - includes air dehumidifier, a HEPA filter, a gas filter, a blower, and a body, these forming an integral system, with the moulding of the HEPA filter prevented by dehumidifying the air taken into the HEPA filter

摘要

The device comprises a body (6) and an air dehumidifier (8,9,10), a HEPA filter (2) and an air circulating device (3), such as a blower or an exhauster arranged to generate the air flow passing through the device. The air dehumidifier is arranged before the HEPA filter in the travel direction of the air flow through the device. The device is furnished with a prefilter for incoming air, with the air circulating device arranged after the filters and the air dehumidifier in the travel direction of the air flow through the device. The device also comprises a hygrometer, a differential pressure instrument, a flow meter, and a thermometer arranged for measuring the air flow through the device.