Patent ID: 8904806

Claim:
A method of increasing a temperature gradient in a magneto-calorific thermal generator ( 1 ) comprising fixed magneto-calorific elements ( 60 ) and magnetic means ( 3 ) capable of moving, relative to the magneto-calorific elements ( 60 ), to alternately supply the magneto-calorific elements to a magnetic field variation between a maximum field value and a minimum field value to change a temperature of the magneto-calorific elements ( 60 ), and collector means for collecting at least one of calories and frigories emitted by the magneto-calorific elements ( 60 ), the collector means comprising at least one collector circuit ( 31 a , 32 a ) with at least one heat transfer fluid circulating in at least one circulation channel of the magneto-calorific elements ( 60 ), the method comprising the steps of: circulating the heat transfer fluid in the collector circuit in a direction parallel to the movement of the magnetic means ( 3 ); and circulating the heat transfer fluid in the collector circuit ( 31 a , 32 a ) at a circulation speed that is greater than the speed of motion of the magnetic means so as to at least one of pre-heating of the magneto-calorific elements ( 60 ) of a thermal module ( 10 ) to modify an initial temperature of the magneto-calorific elements ( 60 ) at least one of before and during the magnetic field variation, before reaching the maximum field value in the thermal module ( 10 ), and pre-cooling of the magneto-calorific elements ( 60 ) of the thermal module ( 10 ) to modify an initial temperature of the magneto-calorific elements ( 60 ) at least one of before and during the magnetic field variation, before reaching the minimum field value in the thermal module ( 10 ).