权利要求：
1. Magneto-calorific thermal generator (1) comprising thermal elements (40-43) based on magneto-calorific material, magnetic means (3) arranged to create a variation in the magnetic field in the said thermal elements and make their temperature vary, at least two separate collector circuits, a "hot" circuit and a "cold" circuit, in each of which circulates a separate heat transfer fluid arranged to collect respectively the calories or frigories emitted by the said thermal elements according to their functional cycle, and means of connecting the collector circuits to external circuits destined to use the said calories and frigories collected, characterised in that the said generator comprises at least one thermal module (10-13) constituted from many thermal elements (40-43) stacked and arranged to delimit between them channels (50) for the circulation of the heat transfer fluid, these channels being divided into hot channels in which circulates the heat transfer fluid of the hot collector circuit and cold channels in which circulates the heat transfer fluid of the cold collector circuit, these hot and cold channels being alternated between the said thermal elements, and in that the said thermal elements (40-43) have inlet orifices (51) and outlet orifices (52) for fluid which communicate with each other so as to distribute the flow of heat transfer fluid in each hot and cold collector circuit respectively into the corresponding hot and cold channels (50).
2. Thermal generator 1 according to Claim 1, characterised in that the said circulation channels (50) have a thickness ranging from 0.01 mm to 10 mm and preferably between 0.15 and 1.5 mm
3. Thermal generator 1 according to Claim 1, characterised in that the said thermal elements (40-43) have recessed shapes to delimit the said channels (50).
4. Thermal generator 1 according to Claim 1, characterised in that the said thermal module (10-13) has spacer plates inserted between the said thermal elements (40-43) to delimit the said channels (50).
5. Thermal generator according to Claim 1, characterised in that the said inlet orifices (51) of the thermal elements (40-43) have a decreasing cross section in the direction of flow of the heat transfer fluid in order to distribute it evenly in the said channels (50) concerned.
6. Thermal generator 1 according to Claim 1, characterised in that the said outlet orifices (52) of the thermal elements (40-43) have an increasing cross section in the direction of flow of the heat transfer fluid in order to gather it together before leaving the said thermal module.
7. Thermal generator according to Claim 5 or Claim 6, characterised in that the said inlet orifices (51) and outlet orifices (52) with variable cross section are located in an insert (72) positioned across the said thermal elements (40-43).
8. Thermal generator according to any one of the preceding Claims, characterised in that the said thermal elements (40-43) are offset relative to each other such that the inlet orifices (51) and outlet orifices (52) are aligned in a helical path.
9. Thermal generator according to Claim 1, characterised in that the said thermal module has a rectilinear configuration and the said thermal elements are linear and stacked horizontally, vertically or in a horizontal and vertical combination.
10. Thermal generator according to Claim 1, characterised in that the said thermal module (10-14) has a circular configuration and the said thermal elements (40-43) are annular and stacked axially, radially or in an axial and radial combination.
11. Thermal generator according to Claim 1, characterised in that the said thermal elements (43) are formed from parts in magneto-calorific material.
12. Thermal generator according to Claim 1, characterised in that the said thermal elements (40-42) comprise one or more parts (60-62) in magneto-calorific material carried by a support (70).
13. Thermal generator according to Claim 12, characterised in that the said support (70) is overmoulded around the said parts (60-62) in magneto-calorific material.
14. Thermal generator according to Claim 12, characterised in that the said support (70) is made from a thermally insulating material.
15. Thermal generator according to Claim 14, characterised in that the said thermally insulating material is filled with particles of thermally conducting material.
16. Thermal generator according to Claim 12, characterised in that the said parts (60) in magneto-calorific material are inserts of geometrical shape or the shape of a sector of a circle.
17. Thermal generator according to Claim 11 or Claim 12, characterised in that the said parts (60-62) in magneto-calorific material have smooth surfaces.
18. Thermal generator according to Claim 11 or Claim 12, characterised in that the said parts (60-62) in magneto-calorific material have relief features on at least one of their faces.
19. Thermal generator according to Claim 18, characterised in that at least one of the said faces has grooves (63, 64) arranged to create swirls in the heat transfer fluid.
20. Thermal generator according to Claim 1, characterised in that the said thermal elements (40-43) are divided into at least two separate thermal sectors (53), each having a channel (50) fed by an inlet orifice (51) and an outlet orifice (52).
21. Thermal generator according to Claim 20, characterised in that the inlet orifices (51) and outlet orifices (52) of the thermal sectors (53) of a given thermal element (40-43) are connected in series, in parallel, or in a series/parallel combination, to the hot or cold collector circuit corresponding to it.
22. Thermal generator according to any one of the preceding Claims, characterised in that it comprises at least two thermal modules (10-13) and in that the said hot and cold collector circuits of the said thermal modules are connected in series, in parallel or in series/parallel combination by distributor discs (20).
23. Thermal generator according to any one of the preceding Claims, characterised in that it comprises sealing flanges (30) arranged to close the said channels (50) of the said terminal thermal elements (40-43) and to mechanically maintain the said thermal elements (40-43) together, these sealing flanges (30) having feed orifices (31) and discharge orifices (32) to connect the said hot and cold collector circuits to the said external circuits.
24. Thermal generator according to Claim 10, characterised in that it comprises an inner sleeve (4) and/or an outer sleeve (5) arranged to seal the said thermal modules (10-13).
25. Thermal generator according to Claim 10, characterised in that it comprises internal magnetic assemblies (3) carried by a shaft (2) driven in rotation and/or translation and an outer armature (6) arranged to close the magnetic flux generated by the said magnetic assemblies (3).
26. Thermal generator according to Claim 10, characterised in that it comprises internal and external magnetic assemblies (3), at least one of these magnetic assemblies (3) being carried by a shaft (2) driven in rotation and/or translation.
27. Thermal generator according to Claim 1, characterised in that the said heat transfer fluid is liquid, gaseous or diphasic.