Flowmeter

1 . A flowmeter for measuring the flow rate of a fluid, comprising:

a measuring tube that forms a measuring space through which the fluid can flow;

at least one baffle arranged in the measuring space; and

a measured value sensor arranged downstream of the baffle in the measuring space, the measured value sensor being deflectable when flowed around by the fluid due to a vortex formation at the baffle;

wherein the measuring tube has an elliptical cross-section at least in a region of the arrangement of the baffle;

wherein the baffle has a baffle axis along which the baffle extends, with the baffle axis being aligned perpendicular to a flow axis extending through the measuring space and/or with the baffle having a round, elliptical, streamlined, trapezoidal, or triangular cross-section;

wherein the elliptical cross-section of the measuring tube is spanned by a longer main axis and a shorter secondary axis extending transversely to the main axis, with the elliptical cross-section of the measuring tube being aligned such that the secondary axis coincides with the baffle axis; and

wherein a circular cross-section of a fluid inlet and/or of a fluid outlet has a diameter dimension that corresponds to a length of the main axis of the elliptical cross-section of the measuring tube and/or so that a width of the measuring space remains constant transversely from the baffle axis from the fluid inlet up to the fluid outlet.

2 . The flowmeter in accordance with claim 1 , wherein the measuring space of the measuring tube extends between the fluid inlet and the fluid outlet along the flow axis, with the fluid inlet having the circular cross-section that merges into the elliptical cross-section of the measuring tube along the flow axis extending up to a position of the baffle.

3 . The flowmeter in accordance with claim 2 , wherein the elliptical cross-section of the measuring tube merges into the circular cross-section from the position of the baffle along the flow axis up to the fluid outlet.

4 . The flowmeter in accordance with claim 1 , wherein a length ratio from the main axis to the secondary axis has a value from 1.1 to 2.0.

5 . The flowmeter in accordance with claim 1 , wherein a ratio of a length of the main axis to a length of a working surface of the baffle has a value from 0.15 to 0.6.

6 . The flowmeter in accordance with claim 1 , wherein the measured value sensor is arranged in a section along the flow axis in the measuring space in which the measuring space has the elliptical cross-section and merges into a circular cross-section in a direction toward the fluid outlet.

7 . The flowmeter in accordance with claim 1 , further comprising at least one projection projecting into the measuring space formed downstream of the baffle at an inner wall bounding the measuring space.

8 . The flowmeter in accordance with claim 1 , wherein the measuring tube is formed with a sheath and with an inner tube, with the inner tube being pushed into the sheath.

9 . The flowmeter in accordance with claim 8 , wherein the inner tube has 70% to 100% of the length of the sheath.

10 . The flowmeter in accordance with claim 8 , wherein the inner tube and/or the sheath has/have a fully circumferentially closed cross-section.

11 . The flowmeter in accordance with claim 8 , wherein the inner tube comprises a plastic; and/or the sheath comprises a metal.

12 . The flowmeter in accordance with claim 8 , wherein the inner tube is manufactured in an injection molding process and/or the sheath is manufactured in a cutting production process.

13 . The flowmeter in accordance with claim 8 , wherein the inner tube and the sheath have a same length in the flow axis.

14 . The flowmeter in accordance with claim 1 , wherein a length ratio from the main axis to the secondary axis has a value from 1.25 to 1.8.

15 . The flowmeter in accordance with claim 1 , wherein a length ratio from the main axis to the secondary axis has a value from 1.3 to 1.6.

16 . The flowmeter in accordance with claim 1 , wherein a ratio of a length of the main axis to a length of a working surface of the baffle has a value from 0.2 to 0.5.

17 . The flowmeter in accordance with claim 1 , wherein a ratio of a length of the main axis to a length of a working surface of the baffle has a value from 0.25 to 0.45.

18 . A flowmeter for measuring the flow rate of a fluid, comprising:

a measuring tube that forms a measuring space through which the fluid can flow;

at least one baffle arranged in the measuring space; and

a measured value sensor arranged downstream of the baffle in the measuring space, the measured value sensor being deflectable when flowed around by the fluid due to a vortex formation at the baffle;

wherein the measuring tube has an elliptical cross-section at least in a region of the arrangement of the baffle;

wherein the baffle has a baffle axis along which the baffle extends, with the baffle axis being aligned perpendicular to a flow axis extending through the measuring space and/or with the baffle having a round, elliptical, streamlined, trapezoidal, or triangular cross-section;

wherein the elliptical cross-section of the measuring tube is spanned by a longer main axis and a shorter secondary axis extending transversely to the main axis, with the elliptical cross-section of the measuring tube being aligned such that the secondary axis coincides with the baffle axis; and

wherein a length ratio from the main axis to the secondary axis has a value from 1.1 to 2.0.