EP0097662B1 - Echangeur de chaleur a ailettes en particulier pour un convecteur - Google Patents

Echangeur de chaleur a ailettes en particulier pour un convecteur Download PDF

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Publication number
EP0097662B1
EP0097662B1 EP83900045A EP83900045A EP0097662B1 EP 0097662 B1 EP0097662 B1 EP 0097662B1 EP 83900045 A EP83900045 A EP 83900045A EP 83900045 A EP83900045 A EP 83900045A EP 0097662 B1 EP0097662 B1 EP 0097662B1
Authority
EP
European Patent Office
Prior art keywords
fins
heat exchanger
distributor
collector
exchangers
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
EP83900045A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0097662A1 (fr
Inventor
Gabriel Giraud
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Individual
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Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to AT83900045T priority Critical patent/ATE16316T1/de
Publication of EP0097662A1 publication Critical patent/EP0097662A1/fr
Application granted granted Critical
Publication of EP0097662B1 publication Critical patent/EP0097662B1/fr
Expired legal-status Critical Current

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    • 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
    • F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
    • F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
    • F28D1/04—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits
    • F28D1/047—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being bent, e.g. in a serpentine or zig-zag
    • F28D1/0475—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being bent, e.g. in a serpentine or zig-zag the conduits having a single U-bend
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H3/00—Air heaters
    • F24H3/002—Air heaters using electric energy supply
    • 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
    • F28F1/26—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 being integral with the element

Definitions

  • the present invention relates to a finned heat exchanger, in particular for a convector, exchanger comprising a collector-distributor of calories having substantially the shape of a tube inside which is arranged a circulating or refrigerating means, said collector- distributor comprising at least two straight parallel branches between them, fins being arranged transversely with respect to the two branches of said manifold-distributor.
  • the invention also relates to the positioning of these exchangers inside the heating convectors.
  • Finned heat exchangers have been known for a long time. They find their application in all areas where a heat exchange is sought, for example but not limited to domestic heating convectors.
  • the transverse fins are supported at at least one point by the circulating means which they surround.
  • the fins determine between them zones of exchange with a gas flow while heating.
  • the known exchangers are all of complex design, further allowing their positioning only in convectors of relatively large dimensions, in particular in width.
  • a fin heat exchanger in particular for a convector, an exchanger comprising a collector-distributor of calories or frigories having substantially the shape of a tube, inside which is disposed a circulating or refrigerant means, said manifold-distributor comprising at least two rectilinear branches parallel to each other, fins being arranged transversely relative to the branches of said tube, characterized in that the transverse fins are of polygonal shape, the branches of the manifold-distributor being disposed at two opposite vertices of each of the fins, said fins not laterally projecting from the branches of the manifold towards the outside of the exchanger and connecting to them in an inclined plane, and the gas flow passing through the structure of the exchanger by intervals between the branches of the manifold-distributor and between the fins.
  • the fins do not project laterally from the branches of the manifold-distributor, which allows optimal positioning of the exchanger in a convector. This will be explained later.
  • the fins have a generally polygonal shape, they are connected to the branches of the manifold-distributor according to an inclined plane, which in fact produces a truncated section of the exchanger on each of its edges.
  • the exchanger can be arranged inclined in the convector, for example from an angle of 30 ° to 60 °.
  • the exchanger will be produced in two 1/2 molded shells, the fins and the branches of the manifold-distributor in the form of 1/2 semi-cylindrical tube having come from molding.
  • the fins will preferentially affect a trapezoidal structure.
  • the exchange zones of each of the 1/2 shells will correspond only to a portion of semi-cylinder, so that during assembly the circulating means can be clamped optimally for the heat exchange with the collector-distributor thus formed by the union of the two portions in the form of 1/2 semi-cylindrical tube.
  • the two shells forming the exchanger may be identical, which will require the use of one and the same mold for their production.
  • the fins of the two shells are perfectly aligned.
  • the fins of each half-shell will generally have an identical frustoconical profile.
  • the union of two sets of fins facing each other forms a succession of Venturi through which the gas flow passes.
  • provision may be made to offset the fins of a 1/2 shell relative to those of the other 1/2 shell. In this way, the number of leading edges is increased, which obviously increases the efficiency of the exchange. This gain can be estimated at around 20% in power.
  • the offset fins will have a taper in the form of an aircraft wing leading edge.
  • the exchanger according to the invention can be designed in a modular way, by proposing extensions (extensions) which can be added at the end so as to obtain exchangers of variable length.
  • the manifold-distributor can assign a U-shaped profile.
  • the inlet and outlet of the circulating medium are on the same side on the exchanger element concerned.
  • an additional fin will be provided, connected by very thick metal bridges delimiting perforations between them.
  • this level it is also possible, to ensure better contact between the exchange zone and the circulating medium, to provide a contact substance between the two elements.
  • this substance can be provided over the entire length of the exchange zone of the collector-distributor.
  • the exchange zone can be painted internally in black or another color which absorbs the radiation of the circulating medium well.
  • the exchanger according to the invention consists of two shells (1) and (2). These two shells are assembled together by any suitable means, screwing, gluing, bolting, riveting, collars, clips, cold gluing, rivets from the foundry.
  • the fins are of polygonal section and do not extend laterally from the branches of the manifold-distribu which constitutes the exchange zone.
  • fins retain exactly the same positioning as at the branches and remain parallel to each other.
  • the fins determine between them over the entire width of the exchanger intervals (6) through which air flows in contact with the exchange surfaces.
  • the fins have in their junction zone with the half-tubes (3) truncated edges (7,8).
  • FIG. 2 shows an electrical resistance (9) which can be used as circulating means.
  • FIG. 3 shows a pin (10) made of copper tube, for example, which can be placed in the half-tubes (3), a pin inside which a circulation of circulating fluid is established. (or refrigerant), for example hot water.
  • the exchanger as described in Figure 1 will be very advantageously made of aluminum, the fins and the half-tubes to which they are connected having come from molding.
  • the two shells (1) and (2) are identical and can therefore be obtained from a single mold.
  • assembly holes (46) are arranged between two fins in a thickness of metal which is integral with the two fins and the part inside of the manifold-distributor.
  • FIG. 5 shows a number of possible variants in terms of the structure and the relative positioning of the fins.
  • the half-fins of each shell will be arranged symmetrically and opposite one another, which is illustrated by the assembly (19).
  • the half-fins will be arranged in staggered rows, with a lateral offset according to a given pitch, for example a half-pitch. This is clearly illustrated in Figure 5.
  • the fins may have any possible section.
  • Conventional fins (20) may also be in the form of shortened fins (21).
  • tapered fins such as those referenced (22).
  • the shortened fins (21), shown in FIG. 5A, allow better passage of the air flow through the exchanger, in particular by their oblong recess.
  • FIGS 8 and 9 show the possible positioning of one or more exchangers in the case of an electric convector.
  • the tubes (3) must be placed at a minimum distance from the walls (23, 24) of the convectors, and at a minimum distance also from each other, which is shown in FIG. 9 , at the central part (25).
  • FIG. 8 shows the advantage of the structure according to the invention, in which the fins are truncated and do not project beyond the exchange zone. It is thus possible to position the exchanger with a certain inclination and at the same time an appreciable gain in space is achieved in width while increasing the performance in terms of yield and temperature distribution.
  • the fins will be arranged so that the sides of the trapezoid (50) are well parallel to the walls of the casing (23 and 24), so that the fins do not project beyond the 'exchange zone delimited by the collector-distributor. It may be accepted that the points (51) Fig. 11 of the fins are inside the exchange zone, but in principle never outside.
  • FIG. 8 can be used for a hot water convector, with the only difference that in this case it is not necessary to leave a gap between the circulation tubes (3) and the walls (23) and (24).
  • FIG. 9 represents two electrical exchangers in accordance with the invention arranged in alignment.
  • the zone (25) will be as narrow as possible compatible with proper operation, so as to limit the circulation of air between the two tubes (26, 27), the latter preferably having to operate between the two branches of a same exchanger.
  • FIGS. 17A and 17B show two exchangers for an electric convector, arranged one above the other.
  • FIG. 17B illustrates the extreme case.
  • an extension ( 39) forming an extension and essentially comprising two rectilinear half-tubes (40), open at each of their lateral ends, and transverse fins (41) of the same structure and obeying the same construction rules as the fins described in the preceding paragraphs.
  • male ends (47) of the element of FIG. 7 are embedded in trunks of cones (48) receptors shown in Fig.4 and 6.
  • the 4 half-holes (49) of fig. 7 will enclose during assembly two cylindrical rods fitted at each end between the first and the second fin on either side of the assembly points, for example lock washers which will serve to maintain this assembly in the longitudinal direction for good tighten if necessary.
  • the female ends of the extensions are also provided with trunks of cones (48) in order to receive extensions in the same way and thus form exchangers of variable length.
  • the two elements correspond only to a portion of semi-cylinder (difference X-X).
  • the evacuation is improved on the rounding of the U-shaped tube by an additional fin (42), connected to the body of the exchanger by bridges of material (43, 44) of great thickness determining between them one or several openings (45).
  • each exchanger or extension shell has holes (52) shown in Figures 1 and 7 useful for hanging or fixing the exchanger in the desired position.
  • assembly holes (17, 18) have been described above on the half-shells for assembling the half-shells, for example by screwing.
  • FIG 18A there are shown two half-shells (101), (102) connected together by a spring clip (103), the final position being shown in Figure 18B.
  • the exchanger At the end of the exchanger, it will have grooves (107) shown in Figure 21 B, in which will be housed the free ends of the clip. It will be noted in this view that the fins may have a non-isosceles trapezoidal section (112) depending on the inclination of the exchanger.
  • the clip will be made of special stainless steel, e.g. structural hardened steel, made high temperatures implemented (of the order of 350 ° C).
  • junction clips (108) are also produced between an exchanger and an extension.
  • the clip comprises an elastic branch (109) and two lateral tabs (110, 111) shown in side view in FIG. 19B.
  • the joint clip also serves to prevent the two assembled elements from separating and bending.
  • FIGS. 20A and 20B show an assembly of substantially different structure, in which rivets (104) coming from the foundry cooperate with an assembly hole (105) of the other half-shell. This structure keeps the symmetry of the half-shells identical.
  • a stud (106) will be produced on the half-shells which will then be riveted as shown in FIG. 2.
  • a surface treatment can be applied externally, for example painting, anodizing, shot blasting, etc., this without limitation, in order to increase the radiation.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Geometry (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Details Of Fluid Heaters (AREA)
  • Domestic Hot-Water Supply Systems And Details Of Heating Systems (AREA)
EP83900045A 1981-12-21 1982-12-21 Echangeur de chaleur a ailettes en particulier pour un convecteur Expired EP0097662B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83900045T ATE16316T1 (de) 1981-12-21 1982-12-21 Waermetauscher mit rippen, insbesondere fuer einen konvektor.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8124040A FR2518729A1 (fr) 1981-12-21 1981-12-21 Echangeur de chaleur a ailettes en particulier pour convecteur de chauffage domestique
FR8124040 1981-12-21

Publications (2)

Publication Number Publication Date
EP0097662A1 EP0097662A1 (fr) 1984-01-11
EP0097662B1 true EP0097662B1 (fr) 1985-10-30

Family

ID=9265298

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83900045A Expired EP0097662B1 (fr) 1981-12-21 1982-12-21 Echangeur de chaleur a ailettes en particulier pour un convecteur

Country Status (7)

Country Link
EP (1) EP0097662B1 (it)
JP (1) JPS59500009A (it)
DE (1) DE3267200D1 (it)
ES (1) ES518409A0 (it)
FR (1) FR2518729A1 (it)
IT (1) IT1155030B (it)
WO (1) WO1983002316A1 (it)

Family Cites Families (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB182144A (en) * 1920-12-21 1922-06-21 Edward Lloyd Pease Improvements in or relating to radiators for heating buildings and the like
US1607172A (en) * 1924-06-10 1926-11-16 Bridgeport Rolling Mills Inc Radiator
US1890620A (en) * 1929-02-09 1932-12-13 Metropolitan Eng Co Radiator and the like
US1893034A (en) * 1929-12-13 1933-01-03 American Radiator & Standard Radiator
US1929618A (en) * 1931-02-10 1933-10-10 Nat Radiator Corp Radiator
FR826886A (fr) * 1936-12-28 1938-04-12 Perfectionnements aux échangeurs thermiques
DE855569C (de) * 1942-11-20 1952-11-13 Westdeutsche Mannesmannroehren Stahlrohr, insbesondere fuer die Berohrung von Kuehlern und Kondensatoren
FR997808A (fr) * 1945-07-28 1952-01-10 Perfectionnements apportés aux échangeurs de température en matières moulées, notamment aux réchauffeurs, économiseurs, radiateurs et analogues
DE882903C (de) * 1950-10-08 1953-08-03 Gerhard Dipl-Ing Goebel Lufterhitzer
DE862161C (de) * 1951-08-21 1953-01-08 Zimmermann & Co Kommanditgesel Oberflaechenschutz fuer Waermeaustauscher
GB886402A (en) * 1958-07-19 1962-01-03 Aerotaps Ltd Improvements relating to space heating
GB1298044A (en) * 1970-12-24 1972-11-29 Mario Andreoli Improvements in or relating to radiator-convectors for heating systems
FR2149289B3 (it) * 1971-08-18 1974-05-10 Guilleux Marc
US3763929A (en) * 1972-01-03 1973-10-09 N Wenig Convection heat exchanger
JPS5418502B2 (it) * 1972-07-11 1979-07-07
DE2324341A1 (de) * 1973-05-14 1974-12-05 Hans Viessmann Heizkoerper
FR2235343B1 (it) * 1973-06-29 1976-06-18 Applimo Applic Thermo Electr
US4171015A (en) * 1977-03-28 1979-10-16 Caterpillar Tractor Co. Heat exchanger tube and method of making same

Also Published As

Publication number Publication date
ES8400193A1 (es) 1983-10-16
IT8224872A0 (it) 1982-12-21
DE3267200D1 (en) 1985-12-05
JPS59500009A (ja) 1984-01-05
IT1155030B (it) 1987-01-21
FR2518729A1 (fr) 1983-06-24
ES518409A0 (es) 1983-10-16
IT8224872A1 (it) 1984-06-21
EP0097662A1 (fr) 1984-01-11
WO1983002316A1 (fr) 1983-07-07

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