Abstract A safety air supplying device by means of which a room is supplied with air which is purified from poisonous substances includes an inlet connected to a coarse dust filter which, in turn, is connected to a suspended-matter filter, or gas filter and to an intake fan which discharges into the room. A by-pass line extends from the inlet to the coarse dust filter and to a line which connects into the outlet of the coarse dust filter at the location where it connects into the gas filter. This line is provided with a rapid closure valve. In those cases, in which the quantity of air which must be delivered must be considerably increased rapidly, this quick closure valve is opened, and, at the same time, the speed of the delivery of the fan can be increased.
A device for supplying air which is purified from poisonous substances to a space, for example to the interior of a vehicle, comprising an inlet conduit, a coarse dust filter disposed in said inlet conduit for flow of air through said coarse dust filter, a suspended matter and gas filter connected in said inlet conduit downstream of said coarse dust filter for the flow of air from said coarse dust filter to and through said suspended matter and gas filter, an inlet fan connected to said suspended matter and gas filter and adapted to discharge into the space for the supply of filtered air thereto, a by-pass line connected from said inlet conduit upstream of and around said coarse dust filter to said suspended matter and gas filter, and a rapid closure valvE in said by-pass line which is openable to permit the flow of air around said coarse dust filter.
Claim 2
Independent Claim
151 words
A device for supplying air which is purified from poisonous substances to a space, for example to the interior of a vehicle, comprising an inlet conduit, a coarse dust filter disposed in said inlet conduit for flow of air through said coarse dust filter, a suspended matter and gas filter connected in said inlet conduit downstream of said coarse dust filter for the flow of air from said coarse dust filter to and through said suspended matter and gas filter, an inlet fan connected to said suspended matter and gas filter and adapted to discharge into the space for the supply of filtered air thereto, a by-pass line connected from said inlet conduit upstream of and around said coarse dust filter to said suspended matter and gas filter, and a rapid closure valvE in said by-pass line which is openable to permit the flow of air around said coarse dust filter.
Claim 3
Dependent Claim
17 words
A safety air device, according to claim 1, wherein said rapid closure valve comprises a damper valve.