Patent ID: 9476610
Filing Date: 2016-10-25
CPC Classification: F24H,F28D,Y02B

Claim Text:
1. A device for producing at least two hot fluids distinct from each other, including a primary fluid, in particular cold water, and a secondary fluid, said device comprising means for conveying or means for producing hot gases and a condensing heat exchanger which comprises: a bundle of tubes acting as a primary exchanger, this bundle consisting in a tube, or in a group of tubes positioned end-to-end, forming a helical winding, in which the wall of the tube(s) is made in thermally good conducting material, this bundle being fixedly mounted inside a gas-tight housing provided with a gas discharge trunk, a first deflector plate, made in a heat-insulating and heat-refractory material, for example based on ceramic, inserted between two consecutive turns of said primary bundle, this first deflector plate being centered on the axis X-X′ of the helix and closing a portion of the inner space of said primary bundle, a discoidal deflecting ring positioned around the bundle of tubes acting as a primary exchanger, downstream from said first deflector plate relatively to the direction of circulation of said hot gases, this deflecting ring being attached at its outer periphery to the inner wall of said housing and at its inner periphery to one of the turns of the primary exchanger, so as to separate the ring-shaped space made between the outer face of the bundles of tube(s) and the housing, into two areas and this in a gas-tight way, a second deflector plate centered on said helix axis X-X′, both deflector plates and the deflecting ring being thus laid out so that the hot gases first cross radially, or approximately radially, a first portion of the primary exchanger located upstream from the first deflector plate, by crossing the interstices separating its turns from the inside outwards, and then a second portion of the primary exchanger extending between the first deflector plate and the deflecting ring by crossing the interstices separating its turns from the outside inwards, and then the last portion of the primary exchanger extending between the deflecting ring and the second deflector plate by crossing the interstices separating its turns from the inside outwards, said device for producing at least two hot fluids further comprising means for circulating said primary fluid to be heated up inside the constitutive tube(s) of the bundle which acts as a primary exchanger, the circulation of this primary fluid being carried out in an opposite direction to that of said hot gases, wherein said condensing heat exchanger comprises a second bundle of tubes acting as a secondary exchanger, fixedly mounted inside said housing coaxially with the first bundle of tubes and placed at the end of the latter, this second bundle also consisting in a tube, or in a group of tubes positioned end-to-end, forming a helical winding, in which the wall of the tube(s) is made in a thermally good conducting material, by the fact that said second deflector plate is inserted between the primary bundle and said secondary bundle such that one side of the second deflector plate is in direct contact with the primary bundle and other side of the second deflector plate is in direct contact with the secondary bundle, this second deflector plate closing the inner space of said secondary bundle, so that said hot gases cross the secondary exchanger, by passing through the interstices separating its turns from the outside inwards, before being finally discharged on the outside at low temperature, via said gas discharge trunk, and by the fact that said device for producing at least two hot fluids comprises means for separately circulating said secondary fluid to be heated up, inside the tube(s) of said secondary bundle, the circulation of this secondary fluid also being carried out in an opposite direction to that of said hot gases.