Abstract: A magnetocaloric thermal generator having a primary circuit fluidically connecting first and second stages of magnetocaloric elements using a heat transfer primary fluid flowing alternately back and forth. The stages being subjected to variable magnetic field of a magnetic system. The primary system includes a cold side and a hot side to which the magnetocaloric elements of the stages are fluidically connected. At least the cold side of the primary circuit has an outlet point connected to another point of the primary circuit, referred to as the injection point, on the hot side by a bypass pipe allowing the primary fluid to be displaced only from the outlet point towards the injection point. The magnetocaloric thermal generator is used in a method for cooling the secondary fluid.

Abstract: A one-piece part based on magnetocaloric material comprising an alloy comprising iron and silicon and a lanthanide, comprises a base in a first plane defined by a first and second direction and N unitary blades secured to the base; the blades having a first and second dimension in the first and second direction, respectively, and a third dimension in a third direction at right angles to the first and second dimensions; an ith blade being separated from an (i+1)th blade by an ith distance; the ratio between the second dimension and first dimension being at least 10; the ratio between the third dimension and first dimension being at least 6; the first dimension being the same order of magnitude as the distance separating an ith blade from an (i+1)th blade. The magnetocaloric material can be rare-earth alloy or a composite material based on polymer binder and rare-earth alloy.

Abstract: A magnetocaloric thermal apparatus (1) with a structure that rotates about a longitudinal axis (L), comprising a magnetic arrangement that defines at least two air gaps (E1, E2) parallel to each other and configured to create, in each of the air gaps, a magnetic field variable about the longitudinal axis (L). Two supports (S1, S2) carry magnetocaloric elements (2) and are positioned each in the midplane (P1, P2) of one of the air gaps. The magnetic arrangement and the supports are in relative movement with respect to one another and positioned angularly with respect to one another about the longitudinal axis (L) so as to generate a phase shift between the magnetic cycle undergone by the magnetocaloric elements (2) of one of the supports (S1) in one of the air gaps and the magnetic cycle undergone by the magnetocaloric elements of the other support (S2) in the other air gap.

Abstract: A magnetocaloric thermal appliance comprising three coaxial magnetic rotors (R1, R2, R3) rotatable about a rotational axis (R), provided with diametrally opposed magnetic poles (P), aligned with each other, and delimiting air gaps therebetween located in two parallel air gap planes (PE1, PE2). Two holders (S1, S2) for magnetocaloric elements (M11, M12, M15, M17, M18) are located in the air gap planes. Magnetocaloric elements (M11, M12, M15, M17, M18) are carried by the two holders (S1, S2) and in fluidic communication with each other by at least one heat transfer fluid that circulates in determined fluidic loops (B1). Each fluidic loop (B1) is arranged for connecting, two by two, magnetocaloric elements (M11, M12; M17, M18) that respectively belong to the two holders (S1, S2). The magnetocaloric elements connected two by two are in a same magnetic state and positioned in front of each other.

Abstract: A one-piece part based on a magnetocaloric material not comprising an alloy comprising iron and silicon and a lanthanide is provided. The part comprises a base in a first plane defined by a first and second direction and a set of N unitary blades secured to the base; the blades having a first dimension in the first direction, a second dimension in the second direction and a third dimension in a third direction at right angles to the first and second dimensions; an ith blade being separated from an (i+1)th blade by an ith distance; the ratio between the second dimension and first dimension being at least 10; the ratio between the third dimension and first dimension being at least 6; the first dimension being the same order of magnitude as the distance separating an ith blade from an (i+1)th blade. A thermal generator comprising one-piece parts is provided.

Abstract: A thermal appliance having an uneven number of closed primary circuits, each including at least two outlet points connected in series to at least one exchange zone. In each circuit, a primary fluid is circulating in an alternating cycle of period (T) having two displacement phases of a half-period (T/2) having identical flow rates and volumes but in opposite directions. The primary fluid circulation cycle is phase-shifted (by T/2N) between each of the primary circuits. The inlet of the exchange zone is connected unidirectionally to one of the outlet points of each of the primary circuits and the outlet of the exchange zone is connected unidirectionally to the other outlet points of the primary circuits so that the sum of the heat transfer fluid flow rates, entering the exchange zone, is always greater than zero. A method for optimizing the heat exchange of such a thermal appliance.

Abstract: A thermal appliance having an uneven number of closed primary circuits, each including at least two outlet points connected in series to at least one exchange zone. In each circuit, a primary fluid is circulating in an alternating cycle of period (T) having two displacement phases of a half-period (T/2) having identical flow rates and volumes but in opposite directions. The primary fluid circulation cycle is phase-shifted (by T/2N) between each of the primary circuits. The inlet of the exchange zone is connected unidirectionally to one of the outlet points of each of the primary circuits and the outlet of the exchange zone is connected unidirectionally to the other outlet points of the primary circuits so that the sum of the heat transfer fluid flow rates, entering the exchange zone, is always greater than zero. A method for optimizing the heat exchange of such a thermal appliance.

Abstract: A magnetocaloric thermal appliance comprising three coaxial magnetic rotors (R1, R2, R3) rotatable about a rotational axis (R), provided with diametrally opposed magnetic poles (P), aligned with each other, and delimiting air gaps therebetween located in two parallel aft gap planes (PE1, PE2). Two holders (S1, S2) for magnetocaloric elements (M11, M12, M15, M17, M18) are located in the air gap planes. Magnetocaloric elements (M11, M12, M15, M17, M18) are carried by the two holders (S1, S2) and in fluidic communication with each other by at least one heat transfer fluid that circulates in determined fluidic loops (B1). Each fluidic loop (B1) is arranged for connecting, two by two, magnetocaloric elements (M11, M12; M17, M18) that respectively belong to the two holders (S1, S2). The magnetocaloric elements connected two by two are in a same magnetic state and positioned in front of each other.

Abstract: A one-piece part based on a magnetocaloric material not comprising an alloy comprising iron and silicon and a lanthanide is provided. The part comprises a base in a first plane defined by a first and second direction and a set of N unitary blades secured to the base; the blades having a first dimension in the first direction, a second dimension in the second direction and a third dimension in a third direction at right angles to the first and second dimensions; an ith blade being separated from an (i+1)th blade by an ith distance; the ratio between the second dimension and first dimension being at least 10; the ratio between the third dimension and first dimension being at least 6; the first dimension being the same order of magnitude as the distance separating an ith blade from an (i+1)th blade. A thermal generator comprising one-piece parts is provided.

Abstract: A one-piece part based on magnetocaloric material comprising an alloy comprising iron and silicon and a lanthanide, comprises a base in a first plane defined by a first and second direction and N unitary blades secured to the base; the blades having a first and second dimension in the first and second direction, respectively, and a third dimension in a third direction at right angles to the first and second dimensions; an ith blade being separated from an (i+1)th blade by an ith distance; the ratio between the second dimension and first dimension being at least 10; the ratio between the third dimension and first dimension being at least 6; the first dimension being the same order of magnitude as the distance separating an ith blade from an (i+1)th blade. The magnetocaloric material can be rare-earth alloy or a composite material based on polymer binder and rare-earth alloy.

Abstract: The thermal flux generating device (10) with magnetocaloric material comprises an external cylindrical shell (11), made out of metal or any other adequate material, which delimits the inside of the device (10). Inside this shell (11), a rotor (12) is mounted coaxially which consists of a rotary magnetic arrangement, at least one roughly circular ring of elements (13) comprising at least one magnetocaloric material, this ring is positioned coaxially around the rotor (12) and a set of electric coils (14), with radial axes, evenly positioned around the rotor (12) and which make up a stator (15) electrically supplied so as to create a rotating field that rotationally drives the magnetic arrangement.

Abstract: The electric motor (10) of the rotary type comprises a circular peripheral frame (11) inside of which a stator (12) is mounted, and the stator (12) comprises electrical coils (13) having each an armature (13a) and a winding of conductive wires (13b). The electric motor (10) comprises equipment (14) which is movable in relation to the stator, this mobile equipment is in this case a rotor (15) arranged coaxially in relation to the stator (12). The rotor (15) comprises a set of electric coils (16) which are electromagnets. The armatures (13a) of the electric coils (13) and those of the electric coils (16) comprise advantageously at least one element out of reverse magnetocaloric material arranged so as to contribute to cooling of the electric motor.

Abstract: A magnetocaloric heat appliance which comprises at least one magnetocaloric element through which a heat transfer fluid flows and a magnetic activation and deactivation mechanism for the magnetocaloric element which comprises a magnetic field generator (1) provided with at least one magnetic assembly (2) arranged so as to create a magnetic field in a gap (4). The magnetocaloric element (13) is in a relative movement to the magnetic field generator (1). This appliance is characterized in that the magnetic assembly (2) is arranged in a casing (11) which comprises at least one opening (5) in communication with the gap (4) and the magnetic field generator (1) also comprises at least one canalising mechanism (6) connected with the casing (11) and able to capture and canalise the magnetic field leakages that occur outside of the magnetic field generator (1), in the region close to the opening (5).

Abstract: A thermal generator (100) with at least one thermal module (110) comprising at least two magnetocaloric elements (111, 112). The thermal generator is characterized in that it comprises at least two magnetic assemblies (131, 132) in which one magnetic assembly (131, 132) subjects at least one magnetocaloric element (111, 112) of the thermal module (110) to alternate magnetic phases. The thermal generator is further characterized in that it comprises a thermally insulating body insulating the magnetic assemblies (131, 132) from each other and forming thermally insulated cells (141, 142) comprising one magnetic assembly (131, 132) and its corresponding magnetocaloric elements (111, 112).

Abstract: The present invention relates to a heat generator (10) comprising magnetocaloric elements (2) arranged on a circle around a central axis, a magnetic arrangement (3) made of alternating magnetized zones (4) and non magnetized zones (5), located inside the circle formed by the magnetocaloric elements (2), rotated around the central axis and co-operating with a field closing device (6) arranged to loop the magnetic flux generated by the magnetic arrangement to subject alternately the magnetocaloric elements (2) to a magnetic field variation and create alternately in each magnetocaloric element (2) a heating cycle and a cooling cycle, in synchronization with the circulation of at least one heat transfer fluid arranged to pass through the magnetocaloric elements (2) during the heating and cooling cycles, heat generator (1) characterized in that the field closing device (6) comprises a heat insulation means (9).

Abstract: A heat generator (1) comprises at least one thermal module (1?) which contains at least two adjacent magnetocaloric elements (2), and a common distribution chamber (3), associated with a heat transfer fluid circulation device (4), fluidly connects the adjacent magnetocaloric elements (2) with one another. Two end chambers (5, 6) are associated with a circulation means (7) and fluidly connected each with the two magnetocaloric elements (2) located at the hot end (9) and a cold (11) end of the thermal module (1). A magnetic arrangement of the heat generator (1) subjects each of the magnetocaloric element (2) to a variable magnetic field. The circulation mechanism (4), associated with the common distribution chamber (3), moves the heat transfer fluid simultaneously through the two adjacent magnetocaloric elements (2) in different circulation directions.

Abstract: A heat generator comprising at least one thermal module comprising a magnetocaloric element crossed by a heat transfer fluid and two hot and cold chambers arranged on each side of the magnetocaloric element and containing a displacement device for directing the heat transfer fluid through the magnetocaloric element. A magnetic arrangement creates a magnetic field variation in each magnetocaloric element. A device for driving the displacement device, according to reciprocating movement in the concerned chamber, to displace the heat transfer fluid in synchronization with the magnetic field variation. The drive device contains a closed fluid circuit which connects the hot and cold chambers in which a working fluid is driven by a suction and discharge device. At least one switching interface is synchronized with the magnetic arrangement for alternately connecting each hot and cold chamber to suction and discharge sides of the suction and discharge device and inversely.

Abstract: The electric motor (10) of the rotary type comprises a circular peripheral frame (11) inside of which a stator (12) is mounted, and the stator (12) comprises electrical coils (13) having each an armature (13a) and a winding of conductive wires (13b). The electric motor (10) comprises equipment (14) which is movable in relation to the stator, this mobile equipment is in this case a rotor (15) arranged coaxially in relation to the stator (12). The rotor (15) comprises a set of electric coils (16) which are electromagnets. The armatures (13a) of the electric coils (13) and those of the electric coils (16) comprise advantageously at least one element out of reverse magnetocaloric material arranged so as to contribute to cooling of the electric motor.

Abstract: The thermal flux generating device (10) with magnetocaloric material comprises an external cylindrical shell (11), made out of metal or any other adequate material, which delimits the inside of the device (10). Inside this shell (11), a rotor (12) is mounted coaxially which consists of a rotary magnetic arrangement, at least one roughly circular ring of elements (13) comprising at least one magnetocaloric material, this ring is positioned coaxially around the rotor (12) and a set of electric coils (14), with radial axes, evenly positioned around the rotor (12) and which make up a stator (15) electrically supplied so as to create a rotating field that rotationally drives the magnetic arrangement.

Abstract: A generator comprising at least one thermal stage having magnetocaloric elements (2) arranged around an axis and a magnetic arrangement (3) supported by a drive shaft (30) that rotates about the axis to subject the elements to a variation in magnetic field. The generator comprises pistons (70) to force heat transfer fluid through the elements with the pistons being driven in reciprocating translation within chambers (73) by at least one cam (71) that is rotationally driven the drive shaft (30). The generator comprises a forced circulation unit (8a) having planet gears (80) arranged around the central axis, supported by the body (72) of the generator and meshing with an inner crown gear (81) integral with the cam (71). Each gear (80) forms a gear pump that mixes the heat transfer fluid and places the fluid in forced circulation in the tanks (74) and the chambers (73).