The invention is a butterfly valve for a flow duct of an air-conditioning installation. The butterfly valve comprises two butterfly valve faces and is mounted for rotation about an axis. A device with at least two measurement points for determining the volume flow rate of a gaseous medium flowing in
The invention is a butterfly valve for a flow duct of an air-conditioning installation. The butterfly valve comprises two butterfly valve faces and is mounted for rotation about an axis. A device with at least two measurement points for determining the volume flow rate of a gaseous medium flowing in the flow duct is provided. In order to specify a butterfly valve, for example for a volume flow rate controller, which can determine a high differential pressure, even at very low volume flow rates, the butterfly valve comprises at least one hollow chamber on each of its two butterfly valve faces. Each hollow chamber has at least one recess, preferably with a multiplicity of recesses formed in the manner of a perforation. One measurement point is associated with one hollow chamber and the other measurement point is associated with the other hollow chamber.
대표청구항▼
1. Butterfly valve (2) for arrangement in a flow duct (1) of an air-conditioning installation, the butterfly valve (2) comprising two butterfly valve faces and being mounted rotatably about a swivel axis (3), and a device with at least two measurement points for determining the volume flow rate of a
1. Butterfly valve (2) for arrangement in a flow duct (1) of an air-conditioning installation, the butterfly valve (2) comprising two butterfly valve faces and being mounted rotatably about a swivel axis (3), and a device with at least two measurement points for determining the volume flow rate of a gaseous medium flowing in the flow duct being provided, characterized in that the butterfly valve (2) comprises at least one hollow chamber (4, 5) on each of its two butterfly valve faces, each hollow chamber (4, 5) being provided with at least one recess (6), preferably with a multiplicity of recesses (6) formed in the manner of a perforation, and one measurement point being associated with one hollow chamber (4 or 5) and the other measurement point being associated with the other hollow chamber (5 or 4). 2. Butterfly valve (2) according to claim 1, characterized in that at least one of the recesses (6) located in an onflow-side hollow chamber (4) when the butterfly valve (2) is in the closed position is arranged in the region of the hollow chamber (4) forming an onflow-side end face when the butterfly valve (2) is in the open position, and/or in that at least one of the recesses (6) located in a flow-off- side hollow chamber (5) when the butterfly valve (2) is in the closed position is arranged in the region of the hollow chamber (5) forming a flow-off-side end face when the butterfly valve (2) is in the open position. 3. Butterfly valve (2) according to claim 1, characterized in that all recesses (6) located in an onflow-side hollow chamber (4) when the butterfly valve (2) is in the closed position are arranged in a sub-region of the region of the hollow chamber (4) forming an onflow-side end face when the butterfly valve (2) is in the open position, said sub-region, based on the cross section of the flow duct (1) and as viewed in the flow direction (16), being arranged before the highest point P of the course of the contour of the onflow-side hollow chamber (4) when the butterfly valve (2) is in the open position, and/or all recesses (6) located in a flow-off-side hollow chamber (5) when the butterfly valve (2) is in the closed position are arranged in the sub-region of the region of the flow-off-side hollow chamber (5) forming a flow-off-side end face when the butterfly valve (2) is in the open position, said sub-region, based on the cross section of the flow duct (1) and as viewed in the flow direction (16), being arranged after the lowest point T of the course of the contour of the flow-off-side hollow chamber (5) when the butterfly valve (2) is in the open position. 4. Butterfly valve (2) according to claim 1, characterized in that at least one hollow chamber (4, 5) extends over the entire width and/or the entire length of the butterfly valve (2). 5. Butterfly valve (2) according to claim 1, characterized in that the hollow chambers (4, 5) are interconnected, preferably at the edge, either directly or indirectly via a wall portion (7). 6. Butterfly valve (2) according to claim 1, characterized in that the hollow chambers (4, 5) have a common partition wall, in particular formed by the butterfly valve (2). 7. Butterfly valve (2) according to claim 1, characterized in that each measurement point is connected to a transmitter (11), and in particular all measurement points are connected to a common transmitter (11). 8. Butterfly valve (2) according to claim 7, characterized in that the transmitter (11) is arranged in the region of the butterfly valve (2), in particular on the butterfly valve (2). 9. Butterfly valve (2) according to claim 7, characterized in that the transmitter (11) is connected to a controller. 10. Butterfly valve (2) according to claim 9, characterized in that the controller is arranged in the region of the butterfly valve (2), in particular on the butterfly valve (2). 11. Butterfly valve (2) according to claim 1, characterized in that a drive (12) is arranged in the region of the butterfly valve (2), in particular on the butterfly valve (2). 12. Butterfly valve (2) according to claim 1, characterized in that the swivel axis (3) is formed as a hollow shaft. 13. Butterfly valve (2) according to claim 12, characterized in that the hollow shaft is designed to enable at least one pressure line (9, 10) to pass through or forms the pressure line (9, 10) itself. 14. Butterfly valve (2) according to claim 12, characterized in that the hollow shaft is designed to enable at least one power line (13, 14) to pass through or forms the power line (13, 14) itself. 15. Butterfly valve (2) according to claim 9, characterized in that a protractor connected to the controller is provided in order to determine the volume flow rate in accordance with the angular position of the butterfly valve (2). 16. Butterfly valve (2) according to claim 1, characterized in that at least one recess (6) is round or is formed as a slit. 17. Butterfly valve (2) according to claim 1, characterized in that the two hollow chambers (4, 5) are axially symmetrical. 18. Butterfly valve (2) according to claim 1, characterized in that the height of at least one hollow chamber (4, 5) is constant along its length and/or its width. 19. Butterfly valve (2) according to claim 2, characterized in that the surface of the hollow chamber (4) arranged on the onflow side when the butterfly valve (2) is in the closed position first has, in the open position of the butterfly valve (2) and as viewed in the flow direction (16), a course corresponding to a convex curvature and then a course corresponding to a concave curvature, and/or the surface of the hollow chamber (5) arranged on the flow-off side when the butterfly valve (2) is in the closed position first has, in the open position of the butterfly valve (2) and as viewed in the flow direction (16), a course corresponding to a concave curvature and then a course corresponding to a convex curvature. 20. Butterfly valve (2) according to claim 1, characterized in that the height of at least one hollow chamber (4, 5) along its length and/or its width decreases from the middle of the butterfly valve (2) towards the respective edge. 21. Butterfly valve (2) according to claim 1, characterized in that at least one sensor, in particular a sensor formed as an air-quality detector (23) and/or a temperature sensor (22), is arranged in the region of at least one hollow chamber (4, 5), preferably in the region of the onflow-side hollow chamber (4). 22. Butterfly valve (2) according to claim 2, characterized in that, as viewed in the flow direction (16), a flow obstacle (24) is arranged after at least one recess (6), which is located in the onflow-side hollow chamber (4) when the butterfly valve (2) is in the closed position. 23. Butterfly valve (2) according to claim 22, characterized in that the width of at least one flow obstacle (24) reduces as viewed in the flow direction (16). 24. Butterfly valve (2) according to claim 22, characterized in that the height of at least one flow obstacle (24) reduces as viewed in the flow direction (16). 25. Butterfly valve (2) according to claim 2, characterized in that, as viewed in the flow direction (16), a flow obstacle (25) is arranged before at least one recess (6), which is located in the off-flow-side hollow chamber (5) when the butterfly valve (2) is in the closed position. 26. Butterfly valve (2) according to claim 25, characterized in that the width of at least one flow obstacle (25) increases as viewed in the flow direction (16). 27. Butterfly valve (2) according to claim 25, characterized in that the height of at least one flow obstacle (25) increases as viewed in the flow direction (16). 28. Butterfly valve (2) according to claim 22, characterized in that at least one flow obstacle (24, 25) has a width, as viewed orthogonally with respect to the flow direction (16), that is identical to, preferably greater than, the width of the recess (6) associated with this flow obstacle (24, 25).
Kawai Kouzi (Higashi-Osaka JPX), Butterfly valve having a function for measuring a flow rate and method of measuring a flow rate with a butterfly valve.
Ball Larry K. (Chandler AZ) Hines Marshall U. (Scottsdale AZ) Tervo John N. (Scottsdale AZ), Flight craft with fluid systems which incorporate butterfly valves, and butterfly valve methods and apparatus.
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