FR2466735A1 - Heat exchanger for domestic hot water heating - has separate serpentines for primary and secondary circuits preventing contamination by mixing - Google Patents

Heat exchanger for domestic hot water heating - has separate serpentines for primary and secondary circuits preventing contamination by mixing Download PDF

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Publication number
FR2466735A1
FR2466735A1 FR7924282A FR7924282A FR2466735A1 FR 2466735 A1 FR2466735 A1 FR 2466735A1 FR 7924282 A FR7924282 A FR 7924282A FR 7924282 A FR7924282 A FR 7924282A FR 2466735 A1 FR2466735 A1 FR 2466735A1
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France
Prior art keywords
tubes
heat exchanger
serpentines
secondary circuit
primary
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Pending
Application number
FR7924282A
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French (fr)
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SCIM ETS
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SCIM ETS
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Publication date
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Priority to FR7924282A priority Critical patent/FR2466735A1/en
Publication of FR2466735A1 publication Critical patent/FR2466735A1/en
Pending legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F1/00—Tubular elements; Assemblies of tubular elements
    • F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
    • F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
    • F28F1/24—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending transversely
    • F28F1/32—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending transversely the means having portions engaging further tubular elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D3/00—Hot-water central heating systems
    • F24D3/08—Hot-water central heating systems in combination with systems for domestic hot-water supply
    • F24D3/087—Tap water heat exchangers specially adapted therefore

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Geometry (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Abstract

The heat exchanger has a serpentine primary circuit conveying the fluid providing the heat and a secondary circuit conveying the water to be re-heated in the opposite sense. The secondary circuit is formed as a serpentine surrounding the serpentine defined by the primary circuit, the two serpentines being joined together by a large number of pins packed close together. The serpentines are enclosed by a heat-insulated casing, with a fluid between the inside walls of the latter and the fins. Pref. both serpentines are formed by parallel tubes projecting at their ends through the opposing end plates of the casing, for connection to the respective feed and take-off pipes.

Description

La présente invention a pour objet un échangeur de chaleur plus couramment appelé "préparateur d'eau chaude sanitaire". The subject of the present invention is a heat exchanger more commonly called a “domestic hot water preparer”.

Les préparateurs d'eau chaude sanitaire sont généralement constitués d'une cuve pourvue d'une arrivée d'un fluide à réchauffer et d'une sortie du fluide réchauffé,à l'intérieur de la cuve s'étendant un serpentin dans lequel circule un fluide de chauffage. Domestic hot water heaters generally consist of a tank provided with an inlet for a fluid to be heated and an outlet for the heated fluid, inside the tank extending a coil in which circulates a heating fluid.

De tels échangeurs de chaleur sont très connus et présentent l'inconvénient que dans le cas d'une détérioration du serpentin dans lequel circule le fluide de chauffage, celui-ci risque d'entrer en contact avec le fluide à chauffer. Or lorsqu'il s'agit d'eau potable et si par hasard dans la canalisation d'alimentation en eau potable il se produit une dépression, l'eau potable risque d'entre polluée. Such heat exchangers are very well known and have the drawback that in the event of deterioration of the coil in which the heating fluid circulates, it risks coming into contact with the fluid to be heated. However when it comes to drinking water and if by chance in the drinking water supply pipe there is a depression, drinking water risks being polluted.

L'un des buts de la présente invention est de réaliser un échangeur dans lequel les risques de mélange des fluides primaires et des fluides secondaires sont supprimés. One of the aims of the present invention is to provide an exchanger in which the risks of mixing the primary fluids and the secondary fluids are eliminated.

L'échangeur objet de la présente invention est du type comprenant un circuit primaire formé d'un serpentin dans lequel circule un fluide de chauffage et un circuit secondaire dans lequel circule à contre courant un fluide à réchauffer et est caractérisé en ce que le circuit secondaire est constitué par un serpentin entourant le serpentin du circuit primaire ,- lesdits serpentins étant reliés par des ailettes très rapprochées les unes des autres et lesdits serpentins étant logés dans un carter calc- rifugé. The exchanger object of the present invention is of the type comprising a primary circuit formed by a coil in which circulates a heating fluid and a secondary circuit in which circulates against the current a fluid to be heated and is characterized in that the secondary circuit consists of a coil surrounding the coil of the primary circuit, - said coils being connected by fins very close to each other and said coils being housed in a fire-resistant casing.

Ainsi, grâce à l'invention, les fluides primaires et secondaires sont totalement isolés et le fluide secondaire est réchauffé au moyen des ailettes qui relient les serpentins entre eux. Thus, thanks to the invention, the primary and secondary fluids are completely isolated and the secondary fluid is heated by means of the fins which connect the coils to each other.

Suivant une caractéristique constructive particulière, l'échangeur comprend deux platines parallèles traversées par les extrémités de tubes constituant le serpentin du circuit secondaire, lesdites extrémités étant reliées entre elles par des collecteurs, une série de tubes s'étendant entre les tubes du circuit secondaire et entre les platines et reliés entre eux par des coudes, les ailettes reliant les différents tubes entre eux et un carter fixé sur les platines avec interposition d'une matière calorifuge.  According to a particular constructive characteristic, the exchanger comprises two parallel plates traversed by the ends of tubes constituting the coil of the secondary circuit, said ends being connected together by manifolds, a series of tubes extending between the tubes of the secondary circuit and between the plates and connected together by elbows, the fins connecting the different tubes to each other and a casing fixed on the plates with the interposition of a heat-insulating material.

Enfin, les collecteurs sont pourvus de tubes du circuit secondaire obturés par des bouchons amovibles. Finally, the manifolds are provided with secondary circuit tubes closed by removable plugs.

On peut ainsi facilement nettoyer le circuit secondaire en retiran les bouchons amovibles. It is thus easy to clean the secondary circuit by removing the removable plugs.

L'invention va maintenant être décrite avec plus de détails en se référant à un mode de réalisation de l'invention donné à titre d'exemple seulement et représenté aux dessins annexés. The invention will now be described in more detail with reference to an embodiment of the invention given by way of example only and shown in the accompanying drawings.

Sur ces dessins
Fig. I est une vue en perspective avec des arrache ments d'un échangeur de chaleur selon l'invention,
Fig. 2 est une vue en coupe suivant la ligne II-II de la figure 3,
Fig. 3 est une vue en coupe suivant la ligne III-III de la figure 2,
Fig. 4 est une vue en boutle flasque d'extrémité étant supposé arraché
L'échangeur représenté aux dessins comprend deux platines I et 2 qui supportent les différents tubes constituant le circuit secondaire du fluide à réchauffer.On these drawings
Fig. I is a perspective view with cutouts of a heat exchanger according to the invention,
Fig. 2 is a sectional view along line II-II of FIG. 3,
Fig. 3 is a sectional view along line III-III of FIG. 2,
Fig. 4 is an end view of the end flange being assumed to be torn away
The exchanger shown in the drawings comprises two plates I and 2 which support the different tubes constituting the secondary circuit of the fluid to be heated.

Le circuit secondaire comprend huit tubes 3,4,5,6-7,8 9 et IO, les tubes 3 et 4 étant reliés du côté adjacent à la platine I par un collecteur II, tandis que du côté de cette même platine I, les tubes 5 et 6, 7 et 8 et 9 et IO sont reliés respectivement par des collecteurs I2, 13 et I4. Chacun des collecteurs II à I4 comporte six bouchons vissés susceptibles d1- être démontés pour le nettoyage des différents tubes du circuit secondaire. The secondary circuit comprises eight tubes 3,4,5,6-7,8 9 and IO, the tubes 3 and 4 being connected on the side adjacent to the plate I by a collector II, while on the side of this same plate I, tubes 5 and 6, 7 and 8 and 9 and IO are connected respectively by collectors I2, 13 and I4. Each of the manifolds II to I4 has six screw caps which can be dismantled for cleaning the various tubes of the secondary circuit.

Du côté de la platine 2, les extrémités correspondantes des tubes 4 et Ó sont reliées par un collecteur I6,tan-- dis que les extrémités correspondantes des tubes 5 et 7 sont réunies par un collecteur I7 et les extrémités correspondantes des tubes â et IG par un collecteur I8. On the side of the plate 2, the corresponding ends of the tubes 4 and Ó are connected by a collector I6, while the corresponding ends of the tubes 5 and 7 are joined by a collector I7 and the corresponding ends of the tubes â and IG by a collector I8.

L'arrivée du fluide à réchauffer s'effectue à travers un tube 20 relié au tube 3, tandis que la sortie comprend un tube 21 raccordé au tube 9.  The arrival of the fluid to be heated takes place through a tube 20 connected to the tube 3, while the outlet comprises a tube 21 connected to the tube 9.

Le circuit primaire comporte deux tubes 24 et 25 disposés entre les tubes 9 et IO, deux tubes 26 et 27 placés entre les tube 7 et 8, deux tubes 28 et 29 logés entre les tubes 5 et 6 et enfin deux tubes insérés entre les tubes 3 et 4. The primary circuit comprises two tubes 24 and 25 arranged between the tubes 9 and IO, two tubes 26 and 27 placed between the tubes 7 and 8, two tubes 28 and 29 housed between the tubes 5 and 6 and finally two tubes inserted between the tubes 3 and 4.

Les tubes 24 et 25 sont reliés par un coude 32,tandis que l'extrémité libre du tube 25 est reliée par un coude 33 à l'extrémité correspondante du tube 27 dont l'autre extrémité est reliée par un coude 34 au tube 26 dont l'extrémité libre est reliée par un coude 35 à l'extrémité correspondante du tube 28. Un coude 36 relie les deux extrémités correspondantes des.tubes 28 et 29, le tube 29 étant, par son autre extrémité, relié par un coude 37 au tube 31 qui à son autre extrémité est reliée par un coude 38 au tube 30. The tubes 24 and 25 are connected by an elbow 32, while the free end of the tube 25 is connected by an elbow 33 to the corresponding end of the tube 27, the other end of which is connected by an elbow 34 to the tube 26 of which the free end is connected by a bend 35 to the corresponding end of the tube 28. A bend 36 connects the two corresponding ends of the tubes 28 and 29, the tube 29 being, by its other end, connected by a bend 37 to the tube 31 which at its other end is connected by an elbow 38 to the tube 30.

Les quatre tubes 9, 24, 25 et IO sont reliés entre eux par des séries d'ailettes 40. The four tubes 9, 24, 25 and IO are connected together by series of fins 40.

Les quatre tubes 7, 26, 27 et 8 sont réunis entre eux par des ailettes 41.  The four tubes 7, 26, 27 and 8 are joined together by fins 41.

Les quatre tubes 5, 28, 29 et 6 -sont reliés par des ailettes 42 et enfin les tubes 3, 30, 31 et 4 sont eux réunis par des ailettes 43. The four tubes 5, 28, 29 and 6 are connected by fins 42 and finally the tubes 3, 30, 31 and 4 are joined by fins 43.

Sur les flasques I et 2 est fixé, par des vis 44, un carter en tôle 45 et une matière calorifuge est insérée entre la surface interne du carter et les ailettes. On the flanges I and 2 is fixed, by screws 44, a sheet metal casing 45 and a heat-insulating material is inserted between the internal surface of the casing and the fins.

Le fluide primaire de chauffage arrive par un tube 46 relié au tube 24 et s'échappe par un tube 47 relié au tube 30. The primary heating fluid arrives through a tube 46 connected to the tube 24 and escapes through a tube 47 connected to the tube 30.

Dans un tel échangeur, le fluide primaire circule à contre courant par rapport au fluide secondaire et la chaleur est transmise par les différentes ailettes 40, 41, 42 et 43 qui sont très rapprochées et qui relient les tubes entre eux. In such an exchanger, the primary fluid circulates against the current with respect to the secondary fluid and the heat is transmitted by the different fins 40, 41, 42 and 43 which are very close together and which connect the tubes together.

Les différents tubes et coudes constituant le circuit primaire forment un serpentin allongé, tandis que les différents tubes et collecteurs du circuit secondaire forment un second serpentin allongé qui entoure le serpentin du circuit primaire. The various tubes and elbows constituting the primary circuit form an elongated coil, while the various tubes and collectors of the secondary circuit form a second elongated coil which surrounds the coil of the primary circuit.

Un tel échangeur est d'une fabrication simple et peu onéreuse, il peut être réalisé à partir de batteries comprenant chacune quatre tubes parallèles reliés entre eux par des aiglettes, les extrémités des tubes étant ensuite connectées entre elles par des collecteurs ou des coudes.  Such an exchanger is simple and inexpensive to manufacture, it can be produced from batteries each comprising four parallel tubes connected to each other by tabs, the ends of the tubes then being connected together by manifolds or elbows.

Bien entendu, 11 invention n'est pas limitée au mode de réalisation qui vient d'être décrit et qui a été représenté on pourra y apporter de nombreuses modifications de détails sans sortir, pour cela, du cadre de l'invention.  Of course, the invention is not limited to the embodiment which has just been described and which has been shown, it is possible to make numerous modifications of details without departing, for this, from the scope of the invention.

Claims (2)

R E V E N D I C A T I O N S IO - Echangeur de chaleur du type comprenant un circuit primaire formé d'un serpentin dans lequel circule un flui- de de chauffage et un circuit secondaire dans lequel circule à contre courant un fluide à réchauffer, caractérisé en ce que le circuit secondaire est constitué par un serpentin entourant le serpentin du circuit primaire, lesdits serpentins étant reliés par des ailettes très rapprochées les unes des autres et lesdits serpentins étant logés dans un carter calorifugé.CLAIMS IO - Heat exchanger of the type comprising a primary circuit formed by a coil in which circulates a heating fluid and a secondary circuit in which circulates against the current a fluid to be heated, characterized in that the secondary circuit is constituted by a coil surrounding the coil of the primary circuit, said coils being connected by fins very close to each other and said coils being housed in a thermally insulated casing. 20 - Echangeur de chaleur selon la revendication I caractérisé en ce qu'il comprend deux platines parallèles traversées par les extrémités de tubes constituant le serpentin du circuit secondaire, lesdits extrémités étant reliées entre elles par des collecteurs, une série de tubes s'étendant entre les tubes du circuit secondaire et entre les platines et reliés entre eux par des coudes, les ailettes reliant les différents tubes entre eux et un carter fixé sur les platines avec interposition d'une matière calorifuge. 20 - Heat exchanger according to claim I characterized in that it comprises two parallel plates traversed by the ends of tubes constituting the coil of the secondary circuit, said ends being connected together by collectors, a series of tubes extending between the tubes of the secondary circuit and between the plates and connected together by elbows, the fins connecting the different tubes to each other and a casing fixed on the plates with the interposition of a heat-insulating material. 30 - Echangeur de chaleur selon la revendication 2 caractérisé en ce que les collecteurs sont pourvus d'ouvertures s'ouvrant au droit des tubes du circuit secondaire obturées car des bouchons amovibles.  30 - Heat exchanger according to claim 2 characterized in that the collectors are provided with openings opening to the right of the tubes of the secondary circuit closed because of removable plugs.
FR7924282A 1979-09-28 1979-09-28 Heat exchanger for domestic hot water heating - has separate serpentines for primary and secondary circuits preventing contamination by mixing Pending FR2466735A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7924282A FR2466735A1 (en) 1979-09-28 1979-09-28 Heat exchanger for domestic hot water heating - has separate serpentines for primary and secondary circuits preventing contamination by mixing

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7924282A FR2466735A1 (en) 1979-09-28 1979-09-28 Heat exchanger for domestic hot water heating - has separate serpentines for primary and secondary circuits preventing contamination by mixing

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FR2466735A1 true FR2466735A1 (en) 1981-04-10

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2369877A (en) * 2000-12-07 2002-06-12 Steven Caffall Finch Hot water supply systems

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR582363A (en) * 1923-06-16 1924-12-17 Griscom Russell Co heat exchanger
DE648440C (en) * 1933-03-17 1937-08-03 Gen Motors Corp Finned tube heat exchanger
FR1332607A (en) * 1962-05-26 1963-07-19 Improvements to central heating systems with hot water circuit for domestic use
DE2008026A1 (en) * 1969-08-11 1971-02-25 Paxman Coolers Ltd , Bnghouse, Yorkshire (Großbritannien) Liquid cooling device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR582363A (en) * 1923-06-16 1924-12-17 Griscom Russell Co heat exchanger
DE648440C (en) * 1933-03-17 1937-08-03 Gen Motors Corp Finned tube heat exchanger
FR1332607A (en) * 1962-05-26 1963-07-19 Improvements to central heating systems with hot water circuit for domestic use
DE2008026A1 (en) * 1969-08-11 1971-02-25 Paxman Coolers Ltd , Bnghouse, Yorkshire (Großbritannien) Liquid cooling device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2369877A (en) * 2000-12-07 2002-06-12 Steven Caffall Finch Hot water supply systems

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