BIDIRECTIONAL FLOW METER FOR AN MDI DEVICE AND AN MDI DEVICE CONTAINING SUCH A BIDIRECTIONAL FLOW METER

摘要

The present invention relates to a bidirectional flow meter (10) for an MDI device (100), the device (10) having a flow channel (20) and first and second pressure tap points (31, 32) arranged in the flow channel (20), characterized in that the flow channel (20) comprises a first channel part (21) delimited by first walls (41) and a second channel part (22) delimited by second walls (42), said channel parts (21, 22) are separated by a constriction (25), wherein said first channel part (21) widens in a direction leading away from the constriction (25), the first walls (41) are configured to separate an outlet flow entering from the second channel part (22) into the first channel part (21) from the first walls (41) and to guide an inlet flow entering from the first channel part (21) into the second channel part (22), said second walls (42) are configured to guide the outlet flow, the second pressure tap point (32) is arranged in the second channel part (22) and the first pressure tap point (31) is arranged in the first channel part (21) in the vicinity of the constriction (25) along the separated outlet flow. The invention further relates to an MDI device (100) comprising such a bidirectional flow meter (10).