EP1992892B1 - Akkumulator für Klimatisierungsschaltkreis vom Typ interner Wärmetauscher und diesen enthaltender Schaltkreis - Google Patents

Akkumulator für Klimatisierungsschaltkreis vom Typ interner Wärmetauscher und diesen enthaltender Schaltkreis Download PDF

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Publication number
EP1992892B1
EP1992892B1 EP08290444.2A EP08290444A EP1992892B1 EP 1992892 B1 EP1992892 B1 EP 1992892B1 EP 08290444 A EP08290444 A EP 08290444A EP 1992892 B1 EP1992892 B1 EP 1992892B1
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EP
European Patent Office
Prior art keywords
accumulator
high pressure
pressure duct
low pressure
fins
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Active
Application number
EP08290444.2A
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English (en)
French (fr)
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EP1992892A1 (de
Inventor
Benoît Prian
Anthony Garcia
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Hutchinson SA
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Hutchinson SA
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
    • F25B43/006—Accumulators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B40/00—Subcoolers, desuperheaters or superheaters
    • 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
    • F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D7/0008—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one medium being in heat conductive contact with the conduits for the other medium
    • F28D7/0016—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one medium being in heat conductive contact with the conduits for the other medium the conduits for one medium or the conduits for both media being bent
    • 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
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
    • F25B2400/05—Compression system with heat exchange between particular parts of the system
    • F25B2400/051—Compression system with heat exchange between particular parts of the system between the accumulator and another part of the cycle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2500/00—Problems to be solved
    • F25B2500/18—Optimization, e.g. high integration of refrigeration components
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
    • F25B43/003—Filters

Definitions

  • the present invention relates to an accumulator for an air conditioning circuit comprising an internal heat exchanger, and such a circuit incorporating this accumulator, in particular for a motor vehicle.
  • the invention applies in particular but not exclusively to an air conditioning circuit using carbon dioxide as a refrigerant.
  • such an air conditioning circuit with an internal heat exchanger also comprises in particular a compressor, a cooler or condenser from which the high pressure portion to be cooled, an evaporator from which the low pressure portion is heated in the exchanger and a accumulator which is mounted between the evaporator and the compressor and which is essentially designed to separate the liquid and gaseous phase of the refrigerant by preventing the return of the latter in the liquid state to the compressor, via a deflector that includes the accumulator in its upper part.
  • This accumulator is usually provided with a desiccant system in its lower part, to protect the various components of the air conditioning system from moisture.
  • This desiccant system generally consists of a relatively bulky bag or cartridge which contains a desiccant salt and which is manually raised to bottom of the accumulator via a fastening means, such as a clamp, able to keep the desiccant system in place in use.
  • a major disadvantage of the accumulators described in these two documents resides in particular in the length and large size of the coil used for the high pressure pipe, as well as in the constraint inherent in the manual fixing of the aforementioned desiccant system in a small space located at the bottom. of the accumulator.
  • An object of the present invention is to provide an accumulator for an air conditioning circuit intended to be mounted between an evaporator and a compressor of said circuit, this accumulator incorporating a deflector, a desiccant system and an internal heat exchanger which comprises two pipes respectively of high and low pressure intended to be traversed by a refrigerant of said circuit and arranged around a longitudinal axis of symmetry of the accumulator, which allows to overcome the aforementioned drawbacks.
  • an accumulator is such that said exchanger further comprises a stack of fins for cooling the fluid flowing in said high pressure pipe via the low-pressure fluid contained in the accumulator, these fins being stacked on the along the accumulator substantially perpendicular to said axis and supporting, on the one hand, said desiccant system and, secondly, at least said high pressure pipe around said axis (which is thus mounted in contact with the fins).
  • this stack of fins also makes it possible to improve the exchange surface in this exchanger, so as to optimize the cooling of the fluid flowing in the high-pressure pipe.
  • These fins are made of a material of high thermal conductivity, preferably a metallic material such as aluminum, without limitation.
  • said stack may have an axial channel substantially centered on said axis, advantageously obtained via a piercing of orifices opposite in the fins, in which channel is mounted a drying container containing a desiccant (this container may be formed of a conduit in which is housed a bag or a cartridge containing the desiccant, or may be simply formed of such a bag, for example), this container having a side wall in fluid communication with the internal space of the accumulator, for example via perforations formed in this wall.
  • the stack of fins thus supports the desiccant system substantially centered on said axis.
  • this desiccation container thus equipped, which delimits the desiccant system according to the invention, can thus be indifferently a bag or a duct of cylindrical geometry (advantageously of circular section) or prismatic (for example of square section).
  • said desiccation container is formed of a duct mounted integral with said deflector, which may in this case advantageously be formed in one piece with the latter.
  • the "desiccant" deflector thus obtained makes it possible to group together in one and the same component the two main functions of an accumulator, thereby eliminating an article reference and further simplifying the assembly of the desiccant system inside the accumulator. which reduces the overall cost of manufacturing the accumulator.
  • the desiccant system of an accumulator according to the present invention could also be dissociated (i.e. separately mounted) from the deflector equipping it in its upper part.
  • said stack may have at least two axial channels which are formed through said fins and about said axis being two by two interconnected by a bend, and in which is mounted the high pressure line in contact with these fins.
  • this high-pressure pipe may have a lower bend which is adjacent to a bottom wall of the accumulator and which is located immediately above a lower bend of the low-pressure pipe, so that part of the high-pressure pipe is located at the bottom of the accumulator and is thus able to bathe in the low-pressure liquid fluid accumulated at the bottom of the accumulator, in order to optimize the aforementioned cooling of the fluid in the high-pressure pipe.
  • said low pressure pipe can be accommodated along an external lateral face of said stack, for example in two axial housings symmetrical to each other with respect to said axis and formed in this external face.
  • this configuration of the internal heat exchanger according to the invention advantageously has a small footprint inside the accumulator, in particular due to the relatively short length of the high pressure line (unlike the coils of the prior art mentioned above) and that the independence between the two high and low pressure lines makes it possible to dispense with any soldering or soldering connection unit, for example.
  • said high-pressure pipe may have substantially a U-tube shape, the low-pressure pipe being advantageously bent substantially in the form of a "J" pipe and then extending in a plane substantially perpendicular to that containing the high pressure pipeline.
  • the high-pressure pipe may substantially have a first U-shaped tubular section extending non-coplanarly by a second inverted U-shaped tubular section, which is again extended in a non-coplanar manner by a third U-shaped tubular section whose base is for example overlapped by that of the first section, the low pressure pipe can then also be bent substantially J-shaped extending for example in a plane substantially parallel to that containing portions; inlet and outlet of the high pressure pipeline.
  • said fins of said stack may have, in whole or in part, an embossed surface, microreliefs and / or axially offset or facing orifices forming ventilation flaps, so as to improve the natural convection of said fluid. at low pressure through the stack and thus to further optimize the heat exchange for cooling the fluid of the high pressure line.
  • An air conditioning circuit is in particular intended to equip a motor vehicle and comprises an accumulator which is mounted between an evaporator and a compressor of said circuit and which incorporates an internal heat exchanger.
  • this circuit is characterized in that this accumulator is as defined above.
  • the accumulator 1 according to the first example of the figure 1 is intended to be mounted between an evaporator and a compressor of an air conditioning circuit using in particular carbon dioxide as a refrigerant.
  • This accumulator 1 essentially comprises a reservoir 2 which is delimited in this example by a cylindrical side wall ending in a concave bottom, for example substantially in the form of a hemispherical cap (this bottom may nevertheless have any other geometry, such as a conical shape or same flat, non-limiting) and which is closed in its upper part by a closure cap 3 provided with orifices 4 connecting an internal heat exchanger 10 which is integrated with the accumulator 1. It will be noted that no It would not be outside the scope of the invention to provide a second closure plug at the lower end of the accumulator 1.
  • a low pressure line 17 of the exchanger 10 formed of a substantially "J" bent tube, which is mounted in a plane substantially perpendicular to that containing the high pressure line 12 and whose lower elbow 17a overlaps the bottom one; of Line 12 (are visible at figure 1 the upper outlet portion of the low pressure fluid, identified by the arrow C, and the lower elbow 17a).
  • Maintaining the deflector 5 in the accumulator 1 can be ensured by a wedging made to choose against one of the pipes 12 and 17 through the cap 3, against the inner face of the wall of the tank 2, against the stack of fins 11 or even against this plug 3.
  • the deflector assembly 5 - desiccant system 13 which is illustrated preferentially only at figure 2 is characterized in that the drying duct 13a is formed integrally with the deflector 5, being fixed to the latter in a centered manner (the deflector 5 is conventionally flattened dome or cup returned). It will be noted that this monoblock structure advantageously makes it possible to avoid the manual fixing (eg by clamping) of the desiccant system to the bottom of the accumulator 1 and thus to reduce the overall manufacturing cost of the latter.
  • FIGS 3 to 5 illustrate various embodiments of the fins 11, 11 ', 11 "used to form the stack supporting the desiccant system 13 and the high pressure line 12, in which we can see the central channel 14 for the desiccation line 13a and the two lateral channels 15 and 16 for the high-pressure pipe 12, as well as variable shapes for these fins 11, 11 ', 11 "which can be for example substantially rectangular ( Figures 3 and 4 ) or substantially oval with two semicircular portions respectively surrounding the lateral channels 15 and 16 which are interconnected by a median constriction around the central channel 14 ( figure 5 ).
  • the accumulator 101 according to the second example of the invention which is illustrated in FIGS. Figures 6 and 7 and whose internal heat exchanger 110 (housed inside a reservoir 102 closed by the plug 103) is visible in various aspects to Figures 8 to 11 , is essentially different from that of the figure 1 in that the high pressure line 112 of this exchanger 110 does not have a U-shaped tube geometry but, as is notably visible in FIGS.
  • FIG. 8 and 11 has, from its inlet (arrow D) at its fluid outlet (arrow E), a first U-shaped tubular section 112a extending non-coplanarly by a second inverted U-shaped tubular section 112b, which again extends in a non-coplanar manner by a third tubular section 112c U whose base 112d is overlapped downwardly by the elbow 112e of the first section 112a.
  • These sections 112a, 112b, 112c may be provided with assembly sleeves, such as the sleeve 112f illustrated in a non-limiting manner to the figure 6 .
  • these sections 112a, 112b, 112c are received in the stack of fins 111 via axial alignments of perforations formed through these fins 111 (four alignments in the example of Figures 6 to 11 , instead of the two alignments 15 and 16 of the figure 1 ). Note that one could provide a geometry and a different number of such perforation alignments in the fins 111 without departing from the scope of the invention.
  • the low pressure pipe 117 As for the low pressure pipe 117, it is formed of a bent tube in "J" (as in the figure 1 ) and extends according to this example in a plane substantially parallel to that containing the inlet and outlet portions of the high pressure pipe 112, overlapping from below the pipe 112 via its lower elbow 117a. It will be noted, however, that the low pressure pipe 117 could be arranged differently with respect to the pipe 112.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Power Engineering (AREA)
  • Geometry (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Claims (12)

  1. Akkumulator (1, 101) für Klimatisierungskreis, der bestimmt ist, zwischen einem Verdampfer und einem Kompressor des Kreises montiert zu sein, wobei dieser Akkumulator einen Deflektor (5, 105), ein Trocknungssystem (13, 113) und einen internen Wärmetauscher (10, 110) einschließt, der zwei jeweilige Hoch- und Niederdruckkanalisationen (12, 112 und 17, 117) aufweist, die bestimmt sind, von einem Kühlfluid des Kreises durchquert zu werden und die um eine Längssymmetrieachse (6, 106) des Akkumulators angeordnet sind, dadurch gekennzeichnet, dass der Wärmetauscher ferner einen Flügelstapel (11, 11', 11", 111) zur Kühlung des Fluids aufweist, das in der Hochdruckkanalisation zirkuliert, mittels des im Akkumulator enthaltenen Niederdruckfluids, wobei diese Flügel entlang des Akkumulators etwa senkrecht zur Achse angeordnet sind und zum einem das Trocknungssystem und zum anderen mindestens die Hochdruckkanalisation um die Achse stützen.
  2. Akkumulator (1, 101) nach Anspruch 1, dadurch gekennzeichnet, dass der Stapel (11, 11', 11 ", 111) einen axialen Kanal (14, 114) aufweist, der etwa auf der Achse (6, 106) zentriert ist, in welchem ein Trocknungsbehälter (13a, 113a) montiert ist, der ein Trocknungsmittel enthält, beispielsweise des Typs, das in einem Beutel oder in einer Kartusche untergebracht ist, wobei der Behälter eine Seitenwand in Fluidkommunikation mit dem Innenraum des Akkumulators beispielsweise mittels Perforationen, die in dieser Wand ausgebildet sind, aufweist.
  3. Akkumulator (1) nach Anspruch 2, dadurch gekennzeichnet, dass der Trocknungsbehälter (13a) von einer Leitung gebildet ist, die mit dem Deflektor (5) fest montiert ist.
  4. Akkumulator (1, 101) nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass der Stapel (11, 11', 11", 111) mindestens zwei axiale Kanäle (15 und 16) aufweist, die durch die Flügel und um die Achse (6, 106) ausgebildet sind, wobei sie paarweise mit Hilfe eines Knies verbunden sind, und in welchen die Hochdruckkanalisation (12, 112) montiert ist.
  5. Akkumulator (1, 101) nach Anspruch 4, dadurch gekennzeichnet, dass die Hochdruckkanalisation (12, 112) ein unteres Knie (12c, 112e) aufweist, das einer Bodenwand des Akkumulators benachbart ist und das sich unmittelbar über einem unteren Knie (17a, 117a) der Niederdruckkanalisation befindet, so dass ein Teil der Hochdruckkanalisation in dem flüssigen Niederdruckfluid badet, das sich auf dem Boden des Akkumulators angesammelt hat.
  6. Akkumulator (1) nach Anspruch 5, dadurch gekennzeichnet, dass die Hochdruckkanalisation (12) etwa eine Form eines U-Rohrs hat.
  7. Akkumulator (101) nach Anspruch 5, dadurch gekennzeichnet, dass die Hochdruckkanalisation (112) etwa einen ersten U-rohrförmigen Abschnitt (112a) aufweist, der sich nicht koplanar mittels eines zweiten umgekehrt U-rohrförmigen Abschnitts (112b) fortsetzt, der sich erneut nicht koplanar mittels eines dritten U-rohrförmigen Abschnitts (112c) fortsetzt, dessen Basis (112d) beispielsweise von der (112e) des ersten Abschnitts überschnitten wird.
  8. Akkumulator (101) nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass die Niederdruckkanalisation (117) entlang einer äußeren seitlichen Fläche (111a) des Stapels (11, 11', 11", 111) beispielsweise in Bezug zu der Achse (106) zwei zueinander symmetrischen axialen Aufnahmen (115 und 116), die in dieser äußeren Fläche ausgebildet sind, untergebracht ist.
  9. Akkumulator (1) nach den Ansprüchen 6 und 8, dadurch gekennzeichnet, dass die Niederdruckkanalisation (17) etwa in Form eines J-Rohrs gekrümmt ist und sich in einer Ebene erstreckt, die zu der, welche die Hochdruckkanalisation (12) enthält, etwa senkrecht ist.
  10. Akkumulator (101) nach den Ansprüchen 7 und 8, dadurch gekennzeichnet, dass die Niederdruckkanalisation (117) etwa in Form eines J-Rohrs gekrümmt ist und sich in einer Ebene erstreckt, die zu der, welche die Eingangs- und Ausgangsportionen der Hochdruckkanalisation (112) enthält, etwa parallel ist.
  11. Akkumulator (1, 101) nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass die Flügel (11, 11', 11", 111) insgesamt oder teilweise eine gewaffelte Oberfläche, Mikroreliefs und/oder axial versetzte oder gegenüberliegende Öffnungen, die Lüftungsklappen bilden, aufweisen, um die natürlich Konvektion des Niederdruckfluids durch den Stapel zu verbessern.
  12. Klimatisierungskreis, insbesondere für ein Kraftfahrzeug, aufweisend einen Akkumulator (1, 101), der zwischen einem Verdampfer und einem Kompressor des Kreises montiert ist und der einen internen Wärmetauscher (10, 110) einschließt, dadurch gekennzeichnet, dass der Akkumulator einem der vorangehenden Ansprüche entspricht.
EP08290444.2A 2007-05-16 2008-05-13 Akkumulator für Klimatisierungsschaltkreis vom Typ interner Wärmetauscher und diesen enthaltender Schaltkreis Active EP1992892B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0703529A FR2916263B1 (fr) 2007-05-16 2007-05-16 Accumulateur pour circuit de climatisation de type a echangeur thermique interne et circuit l'incorporant

Publications (2)

Publication Number Publication Date
EP1992892A1 EP1992892A1 (de) 2008-11-19
EP1992892B1 true EP1992892B1 (de) 2016-11-02

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EP08290444.2A Active EP1992892B1 (de) 2007-05-16 2008-05-13 Akkumulator für Klimatisierungsschaltkreis vom Typ interner Wärmetauscher und diesen enthaltender Schaltkreis

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FR (1) FR2916263B1 (de)

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Publication number Priority date Publication date Assignee Title
DE102017205410A1 (de) * 2017-03-30 2018-10-04 Robert Bosch Gmbh Batteriesystem

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2505393A (en) * 1945-12-28 1950-04-25 William H Garner Combined filter, drier, heat exchanger, and surge resistor for electrical refrigerators
US4313315A (en) * 1980-02-19 1982-02-02 U.S. Philips Corporation Compressor refrigeration circuits
FR2554220B1 (fr) * 1983-10-28 1986-04-04 Carterot Ets Appareil pour installation frigorifique ou thermodynamique
DE9303177U1 (de) * 1993-03-04 1993-04-29 Pan, Chi Chuan, Taipeh/T'ai-pei Trennvorrichtung für eine Fahrzeugklimaanlage
US6523365B2 (en) * 2000-12-29 2003-02-25 Visteon Global Technologies, Inc. Accumulator with internal heat exchanger
US6463757B1 (en) * 2001-05-24 2002-10-15 Halla Climate Controls Canada, Inc. Internal heat exchanger accumulator
US6681597B1 (en) * 2002-11-04 2004-01-27 Modine Manufacturing Company Integrated suction line heat exchanger and accumulator
US6904770B2 (en) * 2003-09-03 2005-06-14 Delphi Technologies, Inc. Multi-function condenser
WO2006065185A1 (en) * 2004-12-16 2006-06-22 Volvo Lastvagnar Ab Arrangement and method relating to cooling systems

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FR2916263A1 (fr) 2008-11-21
EP1992892A1 (de) 2008-11-19

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