Sensor for a thermal flow meter, a thermal flowmeter and a method for producing a sensor of a thermal flow meter
AssigneeEndress + Hauser Flowtec AG
InventorsHanno Schultheis, Alexander Grün, Stephan Gaberthüel
Life of this patent
Estimating the term…
Abstract
The present disclosure relates to a sensor for a thermal flow measuring device, to a thermal flow measuring device, as well as to a method for the manufacture of such a sensor. The sensor includes a sensor thimble, wherein a defined separation of a sensor element from a thimble floor of the sensor thimble is provided by spacers so that a temperature transfer between the sensor and a liquid flowing around the sensor is provided. Thermal contact between the thimble floor and the sensor element is provided by a solder layer.
Claims15
A sensor for a thermal flow measuring device, comprising:
- a sensor thimble, wherein the sensor thimble has a first longitudinal axis, a lateral surface, an open first end, and a closed second end with a thimble floor, wherein the first longitudinal axis perpendicularly intersects the first end and the second end, and wherein a surface of the thimble floor facing toward the first end is flat;
- at least one sensor element, wherein the sensor element is positioned in the sensor thimble at the thimble floor;
- and
- a solder layer thermally connecting the sensor element with the thimble floor,
- wherein
- the sensor element being positioned relative to the surface as defined by at least one spacer, and
- wherein the at least one spacer includes a cured sinter paste.
A thermal flow measuring device for measuring mass flow of a liquid in a measuring tube having at least one sensor,
- comprising:
- the measuring tube having a second longitudinal axis;
- the at least one sensor positioned in the measuring tube;
- and
- an electronic operating circuit equipped to operate the at least one sensor,
- wherein the at least one sensor includes:
- a sensor thimble, wherein the sensor thimble has a first longitudinal axis, a lateral surface, an open first end, and a closed second end with a thimble floor, wherein the first longitudinal axis perpendicularly intersects the first end and the second end, and wherein a surface of the thimble floor facing toward the first end is flat;
- at least one sensor element, wherein the sensor element is positioned in the sensor thimble at the thimble floor;
- and
- a solder layer thermally connecting the sensor element with the thimble floor,
- wherein
- the sensor element is positioned relative to the surface as defined by at least one spacer, and
- wherein the at least one spacer includes a cured sinter paste.
A method for manufacturing a sensor for a thermal flow measuring device for measuring mass flow of a liquid in a measuring tube,
- wherein the method comprises steps as follows:
- providing a sensor element with a sensor element face;
- providing at least one spacer on the sensor element face to be oriented to face a thimble floor of a sensor thimble, wherein the at least one spacer is a curable sinter paste;
- curing the at least one spacer;
- applying a solder layer on the thimble floor;
- and
- melting the solder layer and pressing the sensor element with the spacer against the thimble floor.
Dependencies are inferred from the claim text.