Abrégé

The invention relates to a fluid control device (10), in particular for a magnetocaloric machine, comprising at least one fluidic distributor (11), comprising a first duct (C1) connected to a first circuit portion (5a), and a second duct (C2) connected to a second circuit portion (5b), said ducts being separate. The fluidic distributor comprises a body (12), and a shutter (13) that is movable with respect to said body between two switching positions in order to allow flow along said first duct (C1) and said second duct (C2) alternately. The body and the shutter each comprise an outlet orifice (OA1, OA2) corresponding to the first duct (C1) and a return orifice (OR1, OR2) corresponding to the second duct (C2). The device further comprises an eccentric control mechanism (20) coupled on the one hand to a rotary actuator (4) and on the other hand to said shutter (13) in order to move it from one switching position to the other in a continuous output movement.

Classes IPC  ?

• F25B 21/00 - Machines, installations ou systèmes utilisant des effets électriques ou magnétiques
• H02N 10/00 - Moteurs électriques utilisant des effets thermiques

Abrégé

The invention relates to a magnetocaloric generator includes a set of porous active elements based of MCM materials, and a magnetic arrangement. The magnetic arrangement includes two superposed magnetic rotors, namely an external magnetic rotor and an internal magnetic rotor delimiting an air gap between them, and includes one same number of magnetic poles. The set of active elements includes a stator disposed in said air gap. The active elements extending axially in said stator enable a two-directional axial circulation of a heat-transfer fluid between a hot end and a cold end of said generator. The external magnetic rotor is advantageously coupled, on the one hand, to an electrical machine by a mechanical coupling, and on the other hand, to said internal magnetic rotor by a magnetic coupling, such that said rotors move in one same direction of rotation and are magnetically synchronous.

Classes IPC  ?

• F25B 21/00 - Machines, installations ou systèmes utilisant des effets électriques ou magnétiques
• H01F 1/01 - Aimants ou corps magnétiques, caractérisés par les matériaux magnétiques appropriésEmploi de matériaux spécifiés pour leurs propriétés magnétiques en matériaux inorganiques
• H01F 7/02 - Aimants permanents

Abrégé

The invention relates to a fluidic control device (10) for a magnetocaloric machine (1) having at least one fluid distributor (11) provided with a slide movable between two distribution positions, the control device having a movable cam (12) cooperating with a follower member (13) integral with the slide of the distributor. The device is characterized in that the cam (12) is a twin-effect cam arranged to move the follower member (13) in translation alternately in one direction and in the opposite direction, corresponding to the two distribution positions of the distributor (11), and in that the follower member (13) has a first guide element (131) arranged to run freely in the movable cam (12), and a second guide element (132) arranged to run freely in a fixed slideway (15) and to guide the follower member (13) in translation alternately between the two distribution positions, the guide elements (131, 132) having rollers in order to ensure rolling contact without friction.

Classes IPC  ?

• F25B 21/00 - Machines, installations ou systèmes utilisant des effets électriques ou magnétiques

Abrégé

A machine for converting thermal energy originating from waste heat deposits into electrical energy. It uses the magnetic phase transition properties of certain materials when they are exposed to a temperature variation with respect to their Curie temperature. The machine includes a magnetothermal converter provided with a fixed stator provided with active elements made of the materials, and a mobile rotor provided with magnetic poles and non-magnetic poles. The machine includes a closed fluidic circuit of heat-transfer fluid, coupled with two thermal sources of different temperatures by means of heat exchangers and with the stator to transfer thermal energy collected in the active elements. A synchronization system makes it possible to expose the active elements to alternating thermal cycles to generate a permanent magnetic imbalance between the rotor and the stator, and generate a displacement of the rotor, creating mechanical energy that can be converted into electrical energy.

Classes IPC  ?

• H02N 99/00 - Matière non prévue dans les autres groupes de la présente sous-classe
• H02N 10/00 - Moteurs électriques utilisant des effets thermiques
• H02N 11/00 - Générateurs ou moteurs non prévus ailleursMouvements dits perpétuels obtenus par des moyens électriques ou magnétiques
• F02G 5/02 - Utilisation de la chaleur perdue dans les gaz d'échappement

Abrégé

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.

Classes IPC  ?

• F25B 21/00 - Machines, installations ou systèmes utilisant des effets électriques ou magnétiques

Abrégé

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.

Classes IPC  ?

• F25B 21/00 - Machines, installations ou systèmes utilisant des effets électriques ou magnétiques
• F28F 27/02 - Commandes ou dispositifs de sécurité spécialement adaptés pour les appareils d'échange ou de transfert de chaleur pour commander la répartition des sources de potentiel calorifique entre des canaux différents
• F28D 15/00 - Appareils échangeurs de chaleur dans lesquels l'agent intermédiaire de transfert de chaleur en tubes fermés passe dans ou à travers les parois des canalisations

Abrégé

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.

Classes IPC  ?

• F25B 21/00 - Machines, installations ou systèmes utilisant des effets électriques ou magnétiques

Abrégé

N+1) in which the primary fluid and the secondary fluid flow unidirectionally and countercurrent with respect to one another.

Classes IPC  ?

• F25B 21/00 - Machines, installations ou systèmes utilisant des effets électriques ou magnétiques
• F28D 15/00 - Appareils échangeurs de chaleur dans lesquels l'agent intermédiaire de transfert de chaleur en tubes fermés passe dans ou à travers les parois des canalisations
• F28D 21/00 - Appareils échangeurs de chaleur non couverts par l'un des groupes

Abrégé

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.

Classes IPC  ?

• F25B 21/00 - Machines, installations ou systèmes utilisant des effets électriques ou magnétiques
• F28F 3/04 - Éléments ou leurs ensembles avec moyens pour augmenter la surface de transfert de chaleur, p. ex. avec des ailettes, avec des évidements, avec des ondulations les moyens faisant partie intégrante de l'élément

Abrégé

A magnetocaloric heat generator (1) which comprises at least one magnetocaloric unit (21) provided with at least one magnetocaloric material (3) in thermal contact with a heat transfer fluid (F) and at least one magnetic unit (41) capable of subjecting the magnetocaloric material (3) to a variable magnetic field. This generator (1) is characterized in that each unit (21, 41) has a modular configuration and comprises at least one fitting form (E1, E2, E3) which facilitates assembly with another unit (41, 21), along a same median axis (M), which is provided with a complementary fitting form (E1, E2, E3).

Classes IPC  ?

• F25D 3/08 - Récipients mobiles portatifs, c.-à-d. adaptés pour être facilement transportables par une personne
• F25B 21/00 - Machines, installations ou systèmes utilisant des effets électriques ou magnétiques
• F25B 29/00 - Systèmes de chauffage et de refroidissement combinés, p. ex. fonctionnant alternativement ou simultanément

Abrégé

A magnetocaloric heat generator having an assembly of at least two magnetocaloric modules with a heat transfer fluid flowing through them. The cold ends of the modules are in fluidic communication via a cold transfer circuit and the hot ends are in fluidic communication via a hot transfer circuit. The cold transfer circuit is arranged so that the fluid exiting the cold end of one of the magnetocaloric modules with an exit temperature enters the cold end of the other magnetocaloric module with an entry temperature that is substantially equal to the temperature of the cold end. The hot transfer circuit modifies the temperature of the fluid so that the fluid exiting the hot end of one of the magnetocaloric modules with an exit temperature enters the hot end of the other magnetocaloric module with an entry temperature that is substantially equal to the temperature of the hot end.

Classes IPC  ?

• F25B 21/00 - Machines, installations ou systèmes utilisant des effets électriques ou magnétiques

Abrégé

A magnetocaloric thermal appliance (10) comprising at least one thermal module (2) with at least one magnetocaloric element (3) in contact with a heat transfer fluid and at least one magnetic arrangement (4) arranged so as to create a magnetic field in a gap (6) defined by the magnetic arrangement (4). The gap (6) has two openings (7) enabling the passage of the thermal module (2) through the gap (6) by a relative movement between the magnetocaloric element (3) and the gap (6). The positions able to be taken by the magnetocaloric element (3), outside of the gap (6), define magnetocaloric region (8) in which the magnetocaloric region (8) is disposed in an enclosure delimited by the magnetic arrangement (4) comprising a body (11) forming deflector of the magnetic field able to capture and to lead towards the magnetic arrangement (4) flux of magnetic field that appears outside of the gap (6).

Classes IPC  ?

• F25B 21/00 - Machines, installations ou systèmes utilisant des effets électriques ou magnétiques

Abrégé

A magnetocaloric heat generator (1) in which a driving mechanism is (26) in fluidic connection with first and second ends (3 and 4) of a thermal module (2), via at least one heat exchange mechanism (7, 27), so that the heat transfer fluid circulates in a closed constant-volume fluidic circuit through the magnetocaloric heat generator (1).

Classes IPC  ?

• F25B 21/00 - Machines, installations ou systèmes utilisant des effets électriques ou magnétiques

Abrégé

A heat generator (1) having at least one thermal module (10) that has N adjacent magnetocaloric elements (2) arranged in a circle around a central axis (A) and is subjected to a varying magnetic field caused by magnetic devices (3). The magnetocaloric elements (2) are associated with N pistons (40) subjected to a reciprocating translation movement by an actuating cam (70) to circulate the heat transfer fluid, contained in the thermal module (10), in two opposite directions, at the same time, so that a first fraction of the heat transfer fluid circulates towards a hot exchange chamber (5), through the magnetocaloric elements (2) and is subjected to a heating cycle, and a second fraction of the heat transfer fluid circulates towards a cold exchange chamber (6), through the magnetocaloric elements (2), and is subjected to a cooling cycle, and inversely. The exchange chambers (5, 6) are coupled with external circuits that use calories and frigories for heating, air-conditioning, tempering systems, etc.

Classes IPC  ?

• F25B 21/00 - Machines, installations ou systèmes utilisant des effets électriques ou magnétiques