Tube with reservoir of phase change material for an evaporator, associated evaporator and air conditioning assembly

Abstract

The invention relates to a tube ( 1 ) for a heat exchange bundle ( 100 ) of a vehicle heat exchanger, said tube ( 1 ) comprising: —two circulation plates ( 3 ) configured to be assembled together in a sealed manner and to form at least one conduit ( 31 ) in which a first heat transfer fluid circulates between said circulation plates ( 3 ), —at least one reservoir plate ( 5 ) comprising cavities ( 51 ), said reservoir plate ( 5 ) being configured to be assembled in a sealed manner on a face of one of the two circulation plates ( 3 ) so as to close the cavities ( 51 ), the cavities ( 51 ) being projections on the face of the reservoir plate ( 5 ) such that a second heat transfer fluid can circulate between the cavities ( 51 ), the tube ( 1 ) further containing a phase change material stored in the housings formed by the cavities ( 51 ), the phase change material having a solidification temperature between 6 and 8 degrees Celsius.

1 . A tube for a heat-exchange core bundle of a vehicle heat exchanger, said tube comprising:
 two circulation plates configured to be assembled with one another in a sealed manner and to form at least one canal in which a first heat-transfer fluid circulates between said circulation plates;   at least one reservoir plate comprising cavities, said reservoir plate being configured to be assembled in a sealed manner on one face of one of the two circulation plates so as to close the cavities, said cavities projecting from the face of the reservoir plate so that a second heat-transfer fluid can circulate between said cavities,   a phase change material stored in housings formed by said cavities ( 51 ), said phase change material having a solidification temperature comprised between 6 and 8 degrees Celsius.   
     
     
         2 . The tube as claimed in  claim 1 , the phase change material having a start of solidification temperature comprised between 7.5 and 8 degrees Celsius. 
     
     
         3 . The tube as claimed in  claim 1 , the phase change material having a melting temperature comprised between 7 and 9 degrees Celsius. 
     
     
         4 . The tube as claimed in  claim 1 , the phase change material having a latent heat of fusion comprised between 130 kJ/kg·K and 250 kJ/kg·K. 
     
     
         5 . The tube as claimed in  claim 1 , the phase change material being a paraffin. 
     
     
         6 . The tube as claimed in  claim 1 , the phase change material being a fatty acid. 
     
     
         7 . An evaporator for a motor vehicle air conditioning circuit, the evaporator comprising:
 a plurality of tubes for a heat-exchange core bundle, each of the plurality of tubes having:
 two circulation plates configured to be assembled with one another in a sealed manner and to form at least one canal in which a first heat-transfer fluid circulates between said circulation plates, 
 at least one reservoir plate comprising cavities, said reservoir plate being configured to be assembled in a sealed manner on one face of one of the two circulation plates so as to close the cavities, said cavities projecting from the face of the reservoir plate so that a second heat-transfer fluid can circulate between said cavities, and 
 a phase change material stored in housings formed by said cavities, said phase change material having a solidification temperature comprised between 6 and 8 degrees Celsius. 
   
     
     
         8 . An air conditioning assembly for an automotive vehicle, said assembly having passing through it an air flow, the air conditioning assembly comprising:
 at least one evaporator comprising a plurality of tubes,   wherein the air flow at least partially bypasses the evaporator, and   wherein each of the plurality of tubes comprises:
 two circulation plates configured to be assembled with one another in a sealed manner and to form at least one canal in which a first heat-transfer fluid circulates between said circulation plates, 
 at least one reservoir plate comprising cavities, said reservoir plate being configured to be assembled in a sealed manner on one face of one of the two circulation plates so as to close the cavities, said cavities projecting from the face of the reservoir plate so that a second heat-transfer fluid can circulate between said cavities, and 
 a phase change material stored in housings formed by said cavities, said phase change material having a solidification temperature comprised between 6 and 8 degrees Celsius. 
   
     
     
         9 . The air conditioning assembly as claimed in  claim 8 , the air flow leaving the evaporator being at a temperature comprised between 1 and 12 degrees Celsius.