Electrical heating device for a motor vehicle, and associated heating, ventilation and/or air conditioning apparatus
The invention relates to a device ( 5 ) for electrically heating fluid for a motor vehicle, said heating device ( 5 ) comprising at least one heating module ( 7 a, 7 b ) for heating said fluid, said at least one heating module ( 7 a, 7 b ) comprising a central core ( 11 ) and a heating element ( 13 ) defining a guide circuit ( 15 ) that guides the fluid between said heating element ( 13 ) and said central core ( 11 ) such that said at least one heating module ( 7 a, 7 b ) comprises at least one disturbing element ( 17; 27; 37; 47 ) arranged in the fluid guide circuit ( 15 ) around the central core ( 11 ) and able to disturb the flow of said fluid. The invention also relates to a heating, ventilation and/or air conditioning apparatus ( 1 ) for a motor vehicle that comprises such an electrical heating device ( 5 ).
1. A device ( 5 ) for electrically heating fluid for a motor vehicle, said heating device ( 5 ) comprising at least one module ( 7 a , 7 b ) for heating the fluid, said at least one heating module ( 7 a , 7 b ) comprising a central core ( 11 ) and a heating element ( 13 ) defining a circuit ( 15 ) for guiding fluid between said heating element ( 13 ) and said central core ( 11 ), wherein said at least one heating module ( 7 a , 7 b ) comprises at least one disruptive element ( 17 ) which is arranged in said circuit ( 15 ) for guiding fluid around said central core ( 11 ) and capable of disrupting a flow of said fluid, wherein said disruptive element ( 17 ) comprises a metal sheet, said metal sheet being bent backwards on itself to form a finned sheet comprising a plurality of internal edges and a plurality of external edges, with each one of said plurality of internal edges separated from a next adjacent one of said plurality of internal edges by one of said plurality of external edges,
wherein said finned sheet is arranged in said circuit ( 15 ) such that a portion of the fluid is guided between said central core ( 11 ) and said plurality of internal edges and such that another portion of the fluid is guided between said heating element ( 13 ) and said plurality of external edges.
2. A device ( 5 ) according to claim 1 , wherein said disruptive element ( 17 ) extends at least in part over an entire length of said guide circuit ( 15 ).
3. A device ( 5 ) according to claim 1 , wherein said disruptive element ( 17 ) has a generally tubular shape.
4. A device ( 5 ) according to claim 1 , wherein said disruptive element ( 17 ) is in contact with an internal surface of said heating element ( 13 ).
5. A device ( 5 ) according to claim 1 , wherein said disruptive element ( 17 ) is in contact with an external surface of said central core ( 11 ).
6. A device ( 5 ) according to claim 1 , wherein said disruptive element ( 17 ) extends at least in part over an entire thickness (e c ) of said guide circuit ( 15 ).
7. A device ( 5 ) according to claim 1 , wherein said disruptive element ( 17 ) is a separate element from said central core ( 11 ) and said heating element ( 13 ).
8. A device ( 5 ) according to claim 1 , wherein said disruptive element and said central core ( 11 ) are formed in one piece.
9. A ventilation, heating and/or air-conditioning apparatus ( 1 ) for a motor vehicle, wherein said apparatus ( 1 ) comprises at least one electrical heating device ( 5 ) according to claim 1 .
10. A device ( 5 ) according to claim 1 , wherein said plurality of external edges are contact with an internal surface of said heating element ( 13 ).
11. A device ( 5 ) according to claim 10 , wherein said plurality of internal edges are in contact with an external surface of said central core ( 11 ).
12. A device ( 5 ) according to claim 1 , wherein said plurality of internal edges are in contact with an external surface of said central core ( 11 ).
13. A device ( 5 ) according to claim 1 , wherein said finned sheet extends at least in part over an entire thickness (e c ) of said guide circuit ( 15 ).
14. A device according to claim 1 , wherein the central core ( 11 ) is solid.
15. A device ( 5 ) for electrically heating fluid for a motor vehicle, said heating device ( 5 ) comprising at least one module ( 7 a , 7 b ) for heating the fluid, said at least one heating module ( 7 a , 7 b ) comprising a central core ( 11 ) and a heating element ( 13 ) defining a circuit ( 15 ) for guiding fluid between said heating element ( 13 ) and said central core ( 11 ), wherein said at least one heating module ( 7 a , 7 b ) comprises a disruptive element ( 27 ) which is arranged in said circuit ( 15 ) for guiding fluid around said central core ( 11 ) and capable of disrupting a flow of said fluid,
wherein said disruptive element ( 27 ) comprises a metal sheet having a pattern in relief and uniform and uniformly distributed bosses, and
wherein the thickness of said disruptive element ( 27 ) is smaller than the thickness of the circuit ( 15 ).
16. A device ( 5 ) according to claim 15 , wherein said disruptive element ( 27 ) is force-fitted in said heating element ( 13 ).
17. The device ( 5 ) according to claim 15 , wherein the thickness of the disruptive element ( 27 ) is smaller than the thickness of the circuit ( 15 ).
18. A ventilation, heating and/or air-conditioning apparatus ( 1 ) for a motor vehicle, wherein said apparatus ( 1 ) comprises at least one electrical heating device ( 5 ) according to claim 15 .
19. A device ( 5 ) according to claim 15 , wherein said metal sheet extends at least in part over an entire length of said guide circuit ( 15 ).
20. A device according to claim 15 , wherein the central core ( 11 ) is solid.