초록

A fluid circulation conduit 1 for use as a heating device in electrical household appliances, includes an element for creating turbulence in the fluid circulating in its inner volume 2. Application of the device is to electrical household appliances equipped with a heating device.

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1. A device for preparing beverages, comprising: a heating device that heats water, comprising a heat exchange part, an electrical resistance, and a plurality of conduit segments in fluid connection with each other and arranged adjacent and parallel to one another such that the plurality of conduits

1. A device for preparing beverages, comprising: a heating device that heats water, comprising a heat exchange part, an electrical resistance, and a plurality of conduit segments in fluid connection with each other and arranged adjacent and parallel to one another such that the plurality of conduits together form an overall serpentine structure with bends connecting ends of adjacent conduits,wherein each conduit segment of the conduit segments is configured to direct flow of the water along a longitudinal direction of each conduit segment,wherein each conduit segment of the conduit segments has an inner volume delimited by at least one inner wall with surfaces in relief that create turbulence in the water circulating within the inner volume of each conduit segment, and where each conduit segment is also delimited by the heat exchange part, an inner side of the heat exchange part forming another inner wall of the conduit segment, and an outer side of the heat exchange part being opposite the inner side and disposed outside of the inner volume, the electrical resistance being fixed onto the outer side,wherein, for each conduit segment of the conduit segments, at least a part of the surfaces in relief is configured to deviate the water away from the longitudinal direction of the conduit segment and towards the inner side of the heat exchange part,wherein each one of the conduit segments is in fluid connection with another one of said conduit segments by way of the bends located at the ends of the conduit segments, arranged so that the water follows a continuous, serpentine path through the heating devicewherein a first plurality of the surfaces in relief comprise sectional variations of the inner volumes of a first plurality of the conduit segments, and wherein the sectional variations comprise at least two zones, a first of the at least two zones being wider and less deep than a second of the at least two zones. 2. The device according to claim 1, wherein the inner side of the heat exchange part is formed as a flat plane. 3. The device according to claim 1, wherein a second plurality of the surfaces in relief comprise surface projections that project towards the inner volume a second plurality of the conduit segments. 4. The device according to the claim 3, wherein the surface projections include studs. 5. The device according to claim 4, wherein the studs have shapes selected from the group consisting of: cylindrical, truncated and pyramidal. 6. The device according to claim 1, wherein the surfaces in relief comprise recessed surfaces that recess into the inner walls of the conduit segments. 7. The device according to claim 1, wherein the sectional variations include variations in width and/or depth of the inner volume. 8. The device according to claim 1, wherein the sectional variations include a succession of sections with different shapes. 9. The device according to claim 1, wherein the at least two zones have a rectangular section. 10. The device according to claim 1, wherein the at least two zones are connected by a transitional section providing width and depth transition. 11. The device according to claim 10, wherein the transitional section comprises a transitional zone in width and a transitional zone in depth. 12. The device according to claim 1, wherein the surfaces in relief are regularly spaced along the longitudinal directions of the conduit segments. 13. The device according to claim 1, wherein the surfaces in relief have inclined sides. 14. The device according to claim 13, wherein the inclined sides have an inclination of between 20° and 60°. 15. The device according to claim 1, wherein the surfaces in relief are formed outside the inner side of the heat exchange part. 16. The device according to claim 1, wherein the heat exchange part is a plate, andwherein the electrical resistance is a thick film resistance screen-printed on an outer face of the plate. 17. The device according to claim 16, wherein the conduit segments are formed by an assembly of parts comprising a base, hollowed out along the longitudinal direction to form a hollowed out portion that forms the inner wall with surfaces in relief, and a cover, formed by the plate, that covers and encloses the hollowed out portion. 18. The device according to claim 1, wherein, for any one conduit segment of the conduit segments, a section of the inner volume of the conduit segment is less than 10 mm2. 19. The device according to claim 1, wherein, for any one conduit segment of the conduit segments, a section of the inner volume of the conduit segment lies between 3 and 6 mm2. 20. The device according to claim 1, wherein the conduit segments are formed of channels, hollowed out from a base element, and the heat exchange part as a cover element placed on the base element over the channels for enclosing the conduit segments. 21. The device according to claim 20, wherein the surfaces in relief are constituted by structures of said channels hollowed out from the base element, and the cover element is constituted by a plate. 22. A device for preparing beverages, comprising: a heating device that heats water, the heating device comprising a heat exchange part, an electrical resistance, and first and second channel arrangements,each of the first and second channel arrangements comprising a plurality of conduit segments, each conduit segment of said conduit segments being configured for directing flow of the water along a longitudinal direction of an inner volume of said conduit segment,wherein for each of the first and second channel arrangements, the inner volume of each conduit segment is delimited by a wall formed with surfaces in relief and another wall constituted by an inner facing portion of a heat exchange part,the surfaces in relief having a configuration that causes turbulence in the water circulating in the inner volume of the conduit segment, at least some of the surfaces in relief being configured to deviate the circulating water away from the longitudinal direction of the conduit segment and towards the inner side of the heat exchange part, andthe heat exchange part having an outer facing side, opposite the inner facing side and disposed outside of the inner volume of the conduit segment, the electrical resistance being fixed onto said outer facing side, andwherein the first and second channel arrangements are adjacent to one another, an outer facing side of the heat exchange part of the first channel arrangement adjacent and facing an outer facing side of the heat exchange part of the second channel arrangement. 23. The device for preparing beverages according to claim 22, wherein, for each of the first and second channel arrangements, the surfaces in relief comprise surface projections that project towards an interior of the inner volumes of the conduit segments, andthe inner side of the heat exchange part is formed as a flat plane facing the wall formed with surfaces in relief. 24. The device for preparing beverages according to claim 22, wherein, for each one of the first and second channel arrangements, each one of said conduit segments is in fluid connection with another one of said conduit segments by way of a bend, arranged so that the water follows a continuous, serpentine path through the heating device. 25. The device for preparing beverages according to claim 22, wherein, for each one of the first and second channel arrangements, each one of said conduit segments is arranged adjacent and parallel to one another and is in fluid connection with another one of said conduit segments so as to form a serpentine path through the heating device. 26. The device for preparing beverages according to claim 22, wherein the surfaces in relief comprise sectional variations in at least one of width and depth of the inner volume of the conduit segments.