Arrangement for controlling airflow for example in clean rooms
OwnerOddvar Inge Bjordalinventor
Life of this patent
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Abstract
A device for controlling airflow between a clean room (1) and an adjacent room (2) is described. Channels (10, 6) lead from the rooms (1, 2) to a common junction (8). A ventilation channel (9) is leading from the common junction (8) for feeding or carrying off air. In the channel (10) from the clean room (1) is included a resistor element for the airflow, while the channel (6) from the adjacent room (2) has low hydraulic impedance.
Claims12
A device for controlling airflow, for use in connection with ventilation of room/cell/zone, designated the special volume (1), having a degree of clean air different from surrounding/adjacent rooms, designated the reference volume (2), characterized in a system that is operated by air pressure alone including a minimum of three channels/channel systems (6, 9, 10) being hydraulically connected in a common junction (8), and in that air can be fed or carried off in at least one of the channels/channel systems, designated the ventilation channel (9), and that in at least one of the other channels/channel systems, designated the reference channel(s) (10), is a low hydraulic impedance from the common junction (8) to the reference volume (2) and that at least one of the other channels/channel systems (6) extends between the common junction and the special volume (1) and has a design or a device, designated the resistor element (7) which provides a suitable drop in pressure when air flows through and that between the reference volume (2) and the special volume (1) is a closable access path (3).
Dependencies are inferred from the claim text.