Heat exchanger, particularly for sealed vessels

The invention relates to a heat exchanger comprising two independent air circuits and associated fans, as well as an exchange surface. According to the invention, the exchange surface consists of a stack of partitions 8, the spacer wedges 9, 10 of which carry out a convective function, according to an alternate successive arrangement of the said wedges ensuring that the two air circuits 3, 5 are separated in a sealed manner. Application to the cooling of vessels containing precision equipment, for example in the field of topography, geophysics and radio-positioning. L'INVENTION CONCERNE UN ECHANGEUR THERMIQUE COMPORTANT DEUX CIRCUITS D'AIR INDEPENDANTS ET DES VENTILATEURS ASSOCIES, AINSI QU'UNE SURFACE D'ECHANGE.SELON L'INVENTION, LA SURFACE D'ECHANGE EST CONSTITUEE D'UN EMPILEMENT DE CLOISONS 8 DONT LES CALES D'ESPACEMENT 9, 10 REMPLISSENT UNE FONCTION DE CONVECTION, SELON UNE ORGANISATION SUCCESSIVE ALTERNEE DESDITES CALES ASSURANT LA SEPARATION ETANCHE DES DEUX CIRCUITS D'AIR 3, 5.APPLICATION AU REFROIDISSEMENT D'ENCEINTES CONTENANT DES APPAREILLAGES DE PRECISION, PAR EXEMPLE DANS LE DOMAINE DE LA TOPOGRAPHIE, GEOPHYSIQUE ET RADIOPOSITIONNEMENT.