EP0022025B1 - Heat exchanger with double envelope - Google Patents

Heat exchanger with double envelope Download PDF

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Publication number
EP0022025B1
EP0022025B1 EP80400957A EP80400957A EP0022025B1 EP 0022025 B1 EP0022025 B1 EP 0022025B1 EP 80400957 A EP80400957 A EP 80400957A EP 80400957 A EP80400957 A EP 80400957A EP 0022025 B1 EP0022025 B1 EP 0022025B1
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EP
European Patent Office
Prior art keywords
water
corrugations
heat exchanger
hot gases
circulation
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP80400957A
Other languages
German (de)
French (fr)
Other versions
EP0022025A2 (en
EP0022025A3 (en
Inventor
Jean-Pierre Fillios
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Chaffoteaux et Maury SAS
Original Assignee
Chaffoteaux et Maury SAS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Chaffoteaux et Maury SAS filed Critical Chaffoteaux et Maury SAS
Priority to AT80400957T priority Critical patent/ATE5997T1/en
Publication of EP0022025A2 publication Critical patent/EP0022025A2/en
Publication of EP0022025A3 publication Critical patent/EP0022025A3/en
Application granted granted Critical
Publication of EP0022025B1 publication Critical patent/EP0022025B1/en
Expired legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
    • F28F3/12—Elements constructed in the shape of a hollow panel, e.g. with channels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D9/00—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D9/0093—Multi-circuit heat-exchangers, e.g. integrating different heat exchange sections in the same unit or heat-exchangers for more than two fluids
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
    • F28F3/02—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations

Definitions

  • the invention relates to a double jacket heat exchanger for a mixed hot water boiler in which hot gases are produced and ducted so as to heat two tubular circuits serving respectively for the circulation of drawing water and that of water. of heating.
  • Patent DE 76 857 also proposes an exchanger resembling the previous one: there are also in this exchanger different pitches for the corrugations of the two networks, but these networks are formed using ribbed foundry plates and not corrugated sheets ; in addition, and above all, like the previous one, the exchanger in question still provides a double exchange and not a triple exchange, which does not allow real use to be made of the different steps of the undulations of the two networks.
  • the invention is essentially characterized in that the two networks, of the exchanger of the mixed hot water boiler, reserved respectively for the circulation of drawing water and that of heating water, are formed, d '' in a manner known per se, by triple walls themselves composed of two corrugated sheets fixed on either side of a common intermediate wall and in that the pitch of the corrugations corresponding to the drawing water is smaller that the pitch of the corrugations corresponding to the heating water, the assembly being arranged in such a way that the hot gases externally skirting the triple walls circulate against the current of the water to be heated circulating inside these walls.
  • these two sheets are constituted by a copper sheet intended to come into contact with water and by a stainless steel sheet intended to come into contact with hot gases.
  • FIGS. 1 and 2 show a heat exchanger with three fluids, one gaseous and the other two liquids.
  • This exchanger is produced by fixing on each side of an intermediate common wall 2, two sheets 10 and 20 comprising longitudinal corrugations 11 and 21, to obtain an exchanger plate generally designated by the reference 1.
  • the corrugations 11 form with the wall 2, a first network of tubes 12 for circulation of sanitary water L, and the corrugations 21 also form, with wall 2, a second independent network of tubes 22 for circulation of heating water L 2 .
  • the formation of the two networks of tubes 12 and 22 is carried out for example in the following manner: three flat sheets made of aluminum alloy or alloy are partially welded together and face to face stainless, and leaving bands not welded. The sheets thus assembled are then formed by directly applying hydraulic pressure with the aid of water injected between them at the non-welded locations, the longitudinal corrugations 11 and 21 are thus obtained.
  • This product known per se, is particularly suitable for placing implementing the present invention, but it goes without saying that the undulations can be produced in any other way without departing from the scope of the invention.
  • the entire exchanger is produced by superimposing, at a certain distance from each other, several plates 1 thus obtained, in such a way that the gases G of combustion of a gas burner circulate between these plates as indicated by the arrows.
  • a plate 1 Starting from a plate 1, it is also possible to form a spiral exchanger inside which the hot gases circulate or else an exchanger of generally parallelepiped shape in which the hot gases are brought to carry out a particular path along said plate.
  • the pitch of the corrugations 11 of the sheet 10 is less than the pitch of the corrugations 21 of the sheet 20, which makes it possible to multiply the contact strips 13 between the sheet 10 and the intermediate wall 2 in order to increase the active heat exchange surface.
  • the two sheets 10 and 20 play the role of gas-water exchanger and the intermediate wall 2 forms a water-water heat exchange fin.
  • the hot gases G heat the two sheets 10 and 20 and the heat transfer fluids L 1 and L 2 .
  • the fluid L is static and the fluid L 2 dynamic, the calories coming from the sheet 10 are transferred to the intermediate wall 2 given the high number of contact strips 13 and are added to the fluid L 2 .
  • water being a very poor thermal conductor the calories of the fluid L 2 in movement are brought back to the common intermediate wall 2 because the fluid L, not being in circulation insulating form, which makes it possible to increase the fluid temperature L2.
  • the diameter of the tubes 12 and 22 being relatively small, the water layers thus created are thin, which increases the speed of circulation of the two fluids for a given flow rate and consequently facilitates heat exchanges.
  • This arrangement therefore makes it possible to obtain an extremely efficient exchanger even in the case where one of the fluids is not in motion.
  • longitudinal fins 3 can be attached to the contact strips 13 between each corrugation 11 of the sheet 10 in order to further increase the thermal conductivity of the assembly.
  • the intermediate plate 2 may include raised patterns to bring the calories from one circuit to the other.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Separation By Low-Temperature Treatments (AREA)

Abstract

1. Double envelope heat exchanger for a composite hot water boiler in which hot gases (G) are produced and conducted so as to heat two tubular circuits serving respectively for the circulation of drawn water (L1 ) and for the circulation of heating water (L2 ), characterized in that the two circuits comprise two independent networks of tubes (12, 22) formed in known manner by triple walls (1) which themselves comprise two corrugated metal sheets (10, 20) fixed to one another by an intermediate common wall (2), the pitch of the corrugations (11) corresponding to the drawn water being smaller than the pitch of the corrugations (21) corresponding to the heating water, and the assembly being arranged so that the hot gases flowing along the outside of the triple walls circulate in counter-current relative to the water to be heated circulating inside these walls.

Description

L'invention concerne un échangeur de chaleure à double enveloppe pour une chaudière mixte à eau chaude dans laquelle des gaz chauds sont produits et conduits de façon à chauffer deux circuits tubulaires servant respectivement à la circulation d'eau de puisage et à celle d'eau de chauffage.The invention relates to a double jacket heat exchanger for a mixed hot water boiler in which hot gases are produced and ducted so as to heat two tubular circuits serving respectively for the circulation of drawing water and that of water. of heating.

Il est connu par le brevet US-PS 2 021 995 d'effectuer un échange thermique double, c'est-à-dire entre deux fluides, en faisant circuler ces deux fluides respectivement dans deux réseaux tubulaires formés par des parois triples elles-mêmes composées de deux tôles ondulées fixées de part et d'autre d'une paroi intermédiaire commune. Il ne s'agit pas dans ce brevet d'un échange thermique triple, c'est-à-dire entre trois fluides, comme celui visé par la présente invention, et il n'est pas question dans ledit brevet de donner des valeurs différentes aux pas des ondulations des deux réseaux.It is known from patent US-PS 2 021 995 to carry out a double heat exchange, that is to say between two fluids, by circulating these two fluids respectively in two tubular networks formed by triple walls themselves composed of two corrugated sheets fixed on either side of a common intermediate wall. In this patent, this is not a triple heat exchange, that is to say between three fluids, like the one targeted by the present invention, and there is no question in said patent of giving different values at the steps of the undulations of the two networks.

Le brevet DE 76 857 propose également un échangeur ressemblant au précédent: on trouve en outre dans cet échangeur des pas différents pour les ondulations des deux réseaux, mais ces réseaux sont constitués à l'aide de plaques de fonderie nervurées et non pas de tôles ondulées; de plus, et surtout, comme le précédent, l'échangeur en question assure encore un échange double et non pas triple, ce qui ne permet pas de mettre véritablement à profit les pas différents des ondulations.des deux réseaux.Patent DE 76 857 also proposes an exchanger resembling the previous one: there are also in this exchanger different pitches for the corrugations of the two networks, but these networks are formed using ribbed foundry plates and not corrugated sheets ; in addition, and above all, like the previous one, the exchanger in question still provides a double exchange and not a triple exchange, which does not allow real use to be made of the different steps of the undulations of the two networks.

L'invention est essentiellement caractérisée en ce que les deux réseaux, de l'échangeur de la chaudière mixte à eau chaude, réservées respectivement à la circulation de l'eau de puisage et à celle de l'eau de chauffage, sont formés, d'une façon connue en soi, par des parois triples elles-mêmes composées de deux tôles ondulées fixées de part et d'autre d'une paroi intermédiaire commune et en ce que le pas des ondulations correspondant à l'eau de puisage est plus petit que le pas des ondulations correspondant à l'eau de chauffage, l'ensemble étant agencé de façon telle que les gaz chauds longeant extérieurement les parois triples circulent à contre-courant de l'eau à chauffer circulant à l'intérieur de ces parois.The invention is essentially characterized in that the two networks, of the exchanger of the mixed hot water boiler, reserved respectively for the circulation of drawing water and that of heating water, are formed, d '' in a manner known per se, by triple walls themselves composed of two corrugated sheets fixed on either side of a common intermediate wall and in that the pitch of the corrugations corresponding to the drawing water is smaller that the pitch of the corrugations corresponding to the heating water, the assembly being arranged in such a way that the hot gases externally skirting the triple walls circulate against the current of the water to be heated circulating inside these walls.

Suivant d'autres caractéristiques préférées de l'invention:

  • - des ailettes longitudinales sont rapportées sur la tôle correspondant au circuit de puisage entre chaque ondulation,
  • - chacune des tôles ondulées est formée par superposition de deux feuilles en matériaux différents,
According to other preferred features of the invention:
  • - longitudinal fins are attached to the sheet corresponding to the drawing circuit between each corrugation,
  • each of the corrugated sheets is formed by superposition of two sheets of different materials,

ces deux feuilles sont constituées par une feuille de cuivre destinée à venir en contact avec l'eau et par une feuille en acier inoxydable destinée à venir en contact avec les gaz chauds.these two sheets are constituted by a copper sheet intended to come into contact with water and by a stainless steel sheet intended to come into contact with hot gases.

D'autres caractéristiques particulières et avantages de l'invention ressortiront de la description suivante dans laquelle on se réfère aux dessins annexés qui représentent:

  • fig. 1 une vue en perspective d'une partie de l'échangeur selon l'invention,
  • fig. 2 une vue schématique en perspective de l'ensemble de l'échangeur,
  • fig. 3 une vue en perspective d'une variante de cet échangeur.
Other particular characteristics and advantages of the invention will emerge from the following description in which reference is made to the appended drawings which represent:
  • fig. 1 is a perspective view of part of the exchanger according to the invention,
  • fig. 2 a schematic perspective view of the entire exchanger,
  • fig. 3 a perspective view of a variant of this exchanger.

On a représenté sur les figs 1 et 2 un échangeur de chaleur à trois fluides, l'un gazeux et les deux autres liquides. Cet échangeur est réalisé en fixant de chaque côté d'une paroi commune intermédiaire 2, deux tôles 10 et 20 comportant des ondulations longitudinales 11 et 21, pour obtenir une plaque échangeur désignée dans son ensemble par la référence 1. Les ondulations 11 forment avec la paroi 2, un premier réseau de tubes 12 pour la circulation de l'eau sanitaire L, et les ondulations 21 forment également avec la paroi 2 un second réseau de tubes 22 indépendant pour la circulation de l'eau de chauffage L2.FIGS. 1 and 2 show a heat exchanger with three fluids, one gaseous and the other two liquids. This exchanger is produced by fixing on each side of an intermediate common wall 2, two sheets 10 and 20 comprising longitudinal corrugations 11 and 21, to obtain an exchanger plate generally designated by the reference 1. The corrugations 11 form with the wall 2, a first network of tubes 12 for circulation of sanitary water L, and the corrugations 21 also form, with wall 2, a second independent network of tubes 22 for circulation of heating water L 2 .

Selon un autre mode de réalisation connu en soi, la formation des deux réseaux de tubes 12 et 22 s'effectue par exemple de la manière suivante: on soude partiellement ensemble et face contre face, trois tôles planes en alliage d'aluminium ou en alliage inoxydable, et en laissant des bandes non soudées. Les tôles ainsi assemblées sont ensuite formées en exerçant directement une pression hydraulique à l'aide d'eau injectée entre elles aux endroits non soudés, on obtient ainsi les ondulations longitudinales 11 et 21. Ce produit, connu en soi, est particulièrement approprié pour mettre en oeuvre la présente invention, mais il va de soi qu'on peut réaliser de toute autre manière les ondulations sans sortir du cadre de l'invention.According to another embodiment known per se, the formation of the two networks of tubes 12 and 22 is carried out for example in the following manner: three flat sheets made of aluminum alloy or alloy are partially welded together and face to face stainless, and leaving bands not welded. The sheets thus assembled are then formed by directly applying hydraulic pressure with the aid of water injected between them at the non-welded locations, the longitudinal corrugations 11 and 21 are thus obtained. This product, known per se, is particularly suitable for placing implementing the present invention, but it goes without saying that the undulations can be produced in any other way without departing from the scope of the invention.

Comme représenté sur la fig. 2, l'ensemble de l'échangeur est réalisé en superposant à une certaine distance les unes des autres plusieurs plaques 1 ainsi obtenues, de telle manière que les gaz G de combustion d'un brûleur à gaz circulent entre ces plaques comme indiqué par les flèches.As shown in fig. 2, the entire exchanger is produced by superimposing, at a certain distance from each other, several plates 1 thus obtained, in such a way that the gases G of combustion of a gas burner circulate between these plates as indicated by the arrows.

En partant d'une plaque 1, il est également possible de former un échangeur à spirale à l'intérieur duquel circulent les gaz chauds ou encore un échangeur de forme générale parallélépipédique dans lequel les gaz chauds sont amenés à effectuer un cheminement particulier le long de ladite plaque.Starting from a plate 1, it is also possible to form a spiral exchanger inside which the hot gases circulate or else an exchanger of generally parallelepiped shape in which the hot gases are brought to carry out a particular path along said plate.

Pour améliorer les échanges thermiques entre les trois fluides, le pas des ondulations 11 de la tôle 10 est inférieur au pas des ondulations 21 de la tôle 20, ce qui permet de multiplier les bandes de contact 13 entre la tôle 10 et la paroi intermédiaire 2 afin d'augmenter la surface active d'échange thermique. Les deux tôles 10 et 20 jouent le rôle d'échangeur gaz-eau et la paroi intermédiaire 2 forme une ailette d'échange thermique eau-eau.To improve the heat exchanges between the three fluids, the pitch of the corrugations 11 of the sheet 10 is less than the pitch of the corrugations 21 of the sheet 20, which makes it possible to multiply the contact strips 13 between the sheet 10 and the intermediate wall 2 in order to increase the active heat exchange surface. The two sheets 10 and 20 play the role of gas-water exchanger and the intermediate wall 2 forms a water-water heat exchange fin.

En effet, les gaz chauds G, circulant de part et d'autre de la plaque 1, chauffent les deux tôles 10 et 20 et les fluides caloporteurs L1 et L2. Si par exemple le fluide L, est statique et le fluide L2 dynamique, les calories en provenance de la tôle 10 se transfèrent à la paroi intermédiaire 2 étant donné le nombre élevé de bandes de contact 13 et viennent s'ajouter au fluide L2. De plus, l'eau étant un très mauvais conducteur thermique, les calories du fluide L2 en mouvement sont ramenées sur la paroi intermédiaire commune 2 car le fluide L, n'étant pas en circulation forme isolant, ce qui permet d'augmenter la température du fluide L2.In fact, the hot gases G, circulating on either side of the plate 1, heat the two sheets 10 and 20 and the heat transfer fluids L 1 and L 2 . If for example the fluid L, is static and the fluid L 2 dynamic, the calories coming from the sheet 10 are transferred to the intermediate wall 2 given the high number of contact strips 13 and are added to the fluid L 2 . In addition, water being a very poor thermal conductor, the calories of the fluid L 2 in movement are brought back to the common intermediate wall 2 because the fluid L, not being in circulation insulating form, which makes it possible to increase the fluid temperature L2.

Dans le cas inverse où le fluide L, est dynamique et le fluide L2 statique, le même phénomène se reproduit.In the opposite case where the fluid L, is dynamic and the fluid L 2 static, the same phenomenon is reproduced.

D'autre part, le diamètre des tubes 12 et 22 étant relativement faible, les lames d'eau ainsi créées sont minces, ce qui augmente la vitesse de circulation des deux fluides pour un débit donné et facilite par conséquent les échanges thermiques.On the other hand, the diameter of the tubes 12 and 22 being relatively small, the water layers thus created are thin, which increases the speed of circulation of the two fluids for a given flow rate and consequently facilitates heat exchanges.

Cette disposition permet donc d'obtenir un échangeur extrêment performant même dans le cas où l'un des fluides n'est pas en mouvement.This arrangement therefore makes it possible to obtain an extremely efficient exchanger even in the case where one of the fluids is not in motion.

Comme représenté sur la fig. 3, des ailettes longitudinales 3 peuvent être rapportées sur les bandes de contact 13 entre chaque ondulation 11 de la tôle 10 afin d'augmenter encore la conductibilité thermique de l'ensemble.As shown in fig. 3, longitudinal fins 3 can be attached to the contact strips 13 between each corrugation 11 of the sheet 10 in order to further increase the thermal conductivity of the assembly.

Suivant une autre variante de l'invention, la plaque intermédiaire 2 peut comporter des motifs en relief pour ramener les calories d'un circuit sur l'autre.According to another variant of the invention, the intermediate plate 2 may include raised patterns to bring the calories from one circuit to the other.

Sans sortir du cadre de l'invention, il est possible de remplacer les ondulations de chaque tôle par des motifs répétitifs en relief ou en creux, et décalés de façon à diviser le courant de circulation du fluide. Il est également possible d'utiliser des tôles formées à partir de deux bandes de matériaux différents, par exemple du cuivre en contact avec l'eau et de l'acier inoxydable en contact avec les gaz chauds.Without departing from the scope of the invention, it is possible to replace the corrugations of each sheet by repetitive patterns in relief or in hollow, and offset so as to divide the circulation current of the fluid. It is also possible to use sheets formed from two strips of different materials, for example copper in contact with water and stainless steel in contact with hot gases.

Claims (4)

1. Double envelope heat exchanger for a composite hot water boiler in which hot gases (G) are produced and conducted so as to heat two tubular circuits serving respectively for the circulation of drawn water (L,) and for the circulation of heating water (L2), characterised in that the two circuits comprise two independent networks of tubes (12, 22) formed in known manner by triple walls (1) which themselves comprise two corrugated metal sheets (10, 20) fixed to one another by an intermediate common wall (2), the pitch of the corrugations (11) corresponding to the drawn water being smaller than the pitch of the corrugations (21) corresponding to the heating water, and the assembly being arranged so that the hot gases flowing along the outside of the triple walls circulate in counter-current relative to the water to be heated circulating inside these walls.
2. Heat exchanger according to claim 1, characterised in that longitudinal fins (3) are provided between each pair of corrugations (11) on the corrugated sheet (10) which corresponds to the drawn water circuit.
3. Heat exchanger according to any preceding claim, characterised in that each corrugated sheet (10, 20) is formed by the superimposition of two layers of different materials.
4. Heat exchanger according to claim 3, characterised in that the two layers consist of a copper foil which is to contact the water and a stainless steel foil which is to contact the hot gases.
EP80400957A 1979-06-25 1980-06-25 Heat exchanger with double envelope Expired EP0022025B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT80400957T ATE5997T1 (en) 1979-06-25 1980-06-25 DOUBLE SURFACE HEAT EXCHANGER.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR7916196A FR2459954B1 (en) 1979-06-25 1979-06-25 DOUBLE REINFORCED HEAT EXCHANGER
FR7916196 1979-06-25

Publications (3)

Publication Number Publication Date
EP0022025A2 EP0022025A2 (en) 1981-01-07
EP0022025A3 EP0022025A3 (en) 1981-02-18
EP0022025B1 true EP0022025B1 (en) 1984-01-25

Family

ID=9227022

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80400957A Expired EP0022025B1 (en) 1979-06-25 1980-06-25 Heat exchanger with double envelope

Country Status (6)

Country Link
EP (1) EP0022025B1 (en)
AT (1) ATE5997T1 (en)
DE (1) DE3066267D1 (en)
ES (1) ES492690A0 (en)
FR (1) FR2459954B1 (en)
PT (1) PT71415A (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2645633B1 (en) * 1989-04-07 1991-07-12 Chaffoteaux Et Maury IMPROVEMENTS ON DOUBLE PIPES FOR MIXED BOILERS, PROCESSES FOR MANUFACTURING SUCH PIPES AND CORRESPONDING BOILERS
FR2657422B1 (en) * 1990-01-25 1998-01-02 Valeo Thermique Moteur Sa BLADE HEAT EXCHANGER, PARTICULARLY FOR A MOTOR VEHICLE.
DE10013435C1 (en) 2000-03-17 2001-10-31 Xcellsis Gmbh Foil evaporator packet has two foils with structured recesses and projections to evaporate two reactant mass fluid flows into two reactant mass gas flows
CN102278903A (en) * 2011-08-16 2011-12-14 李永堂 Plate-type heat exchanger
PL2639541T3 (en) * 2012-03-14 2017-08-31 Alfa Laval Corporate Ab Flow-plate for heat transfer
FR2988823A1 (en) * 2012-04-02 2013-10-04 Eric Martinez Heat exchanger for use in heat pump for production of hot water, has fluid circulation circuit to allow heat exchange between refrigerant fluid or heat transfer fluid in fluid circulation circuit and refrigerant fluid in other fluid circuit

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE76857C (en) * AKTIENGESELLSCHAFT MASCHINENFABRIK GREVENBROICH in Grevenbroich, Rheinprovinz Heat exchange apparatus
US2021995A (en) * 1931-04-11 1935-11-26 Delos P Heath Heat exchanger
FR1332607A (en) * 1962-05-26 1963-07-19 Improvements to central heating systems with hot water circuit for domestic use
FR1452259A (en) * 1965-07-30 1966-02-25 Noxa Fluid fuel central heating boiler, comprising a domestic hot water circuit
FR1473291A (en) * 1966-02-02 1967-03-17 heat exchangers
DE1932112A1 (en) * 1969-06-25 1971-01-07 Conrad Dr Dipl Ing Walter Heat exchanger
CH556523A (en) * 1974-05-20 1974-11-29 Paveg Anstalt LINK RADIATOR.
DE2518683C3 (en) * 1975-04-26 1981-04-09 4P Verpackungen Gmbh, 8960 Kempten Heat exchanger made from two aluminum sheets connected to one another
DE2708270A1 (en) * 1977-02-25 1978-08-31 Siemens Ag Heat exchanger flat panel with channels - has middle panel separating expanded channels in enclosing sheet metal panels
SE7808367L (en) * 1978-08-03 1980-02-04 Ostbo John D B DEVICE EXCHANGER

Also Published As

Publication number Publication date
ATE5997T1 (en) 1984-02-15
FR2459954B1 (en) 1986-09-05
ES8102673A1 (en) 1981-02-16
PT71415A (en) 1980-07-01
EP0022025A2 (en) 1981-01-07
FR2459954A1 (en) 1981-01-16
EP0022025A3 (en) 1981-02-18
ES492690A0 (en) 1981-02-16
DE3066267D1 (en) 1984-03-01

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