EP2102566B1 - Accumulateur pour système de réfrigération d'automobile - Google Patents

Accumulateur pour système de réfrigération d'automobile Download PDF

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Publication number
EP2102566B1
EP2102566B1 EP08702213.3A EP08702213A EP2102566B1 EP 2102566 B1 EP2102566 B1 EP 2102566B1 EP 08702213 A EP08702213 A EP 08702213A EP 2102566 B1 EP2102566 B1 EP 2102566B1
Authority
EP
European Patent Office
Prior art keywords
tubular element
accumulator
pipes
cap
shaped
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.)
Active
Application number
EP08702213.3A
Other languages
German (de)
English (en)
Other versions
EP2102566A2 (fr
Inventor
Carlo Tossi
Paolo Mussi
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.)
TI Automotive Cisliano SRL
Original Assignee
TI Automotive Cisliano SRL
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Publication date
Application filed by TI Automotive Cisliano SRL filed Critical TI Automotive Cisliano SRL
Publication of EP2102566A2 publication Critical patent/EP2102566A2/fr
Application granted granted Critical
Publication of EP2102566B1 publication Critical patent/EP2102566B1/fr
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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
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02—Header boxes; End plates
    • F28F9/0246—Arrangements for connecting header boxes with flow lines
    • 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 regards an accumulator for an automotive refrigeration system.
  • accumulators for refrigeration systems in the automobile industry are assembled by welding the cap onto the tubular body after having inserted the pipes for the circulation of the refrigerant or by pinning the tubular body after having inserted the pipes for the circulation of the refrigerant.
  • the general objective of the present invention is that of manufacturing an accumulator for an automotive refrigeration system made through assembly of components made of various materials without risks of damaging the components and capable of obtaining the sealing and lightness qualities required for the particular intended use.
  • the accumulator according to the present invention is intended for a refrigeration device in the automobile industry and comprises a tubular casing adapted to accommodate an assembly of pipes within which the refrigerant flows, the accumulator being provided with a bottom which closes a first end thereof and in which a pair of connections is provided respectively for refrigerant inlet and outlet pipes and closable in a sealed manner against at second end, located opposite to the first, by means of a cap.
  • an accumulator 10 intended for an automotive refrigeration device, comprises a substantially cylindrical tubular casing element 11, adapted to accommodate an assembly of pipes 40 within which the refrigerant is flowed.
  • the accumulator 10 is provided with a bottom 12 which closes a first end 11' of the tubular element 11 and in which a pair of connections 14a, 14b is provided respectively for an inlet pipe 31 coming from an evaporator and an outlet pipe 32 of the refrigerant flowing towards the exchanger and/or compressor.
  • the tubular element 11 is closable in a sealed manner at a second end 11'' located opposite to the first, through a cap 20.
  • the cap 20 can be made in a substantially flat shape ( figures 1a , 1c , 1d , 1e ) or alternatively be dome-shaped ( figure 1b ).
  • the tubular element 11 and the cap are made of aluminium.
  • the sealing is performed by magnetic impulse explosive welding.
  • the cap 20 is intended to be at least partially inserted into the tubular element 11, by means of an insertion portion 21 of smaller diameter with respect to the internal diameter of the tubular element 11 and ending with a circumferential abutment 22 on which, through magnetic impulse explosive welding, an end portion 13 of the end 11'' of the tubular element 11 is deformed and shaped until the crystalline planes of the surfaces in contact of the two, penetrate into each other substantially forming a single body and thus attaining the sealing.
  • the thickness of the insertion portion 21 is greater than the corresponding thickness of the end portion 13 of the end 11" of the tubular element 11 or alternatively, in case of a substantially flat cap 20, such end portion 13 is intended to come into contact with the circumferential edge 21' of the insertion portion 21 and thus consequently the circumferential abutment 22 can also be provided with a smaller thickness with respect to the corresponding end portion 13 of the tubular element 11, given that the deformation of the latter is directly countered by the circumferential edge 21'.
  • the accumulator is provided with a side inlet and thus the inflow connection 14a and the relative inlet pipe 31 are provided for with a transverse insertion in the bottom 12.
  • the pipes assembly 40 is made of two plastic shells welded by means of known systems for example through vibrations as indicated in the European patent application EP1319909A2 .
  • the cap 20 can be made in the form of a "blind" cover otherwise it can comprise, as in the present embodiment, an outlet hole 23 provided at its base 24 and shaped in such a manner to be able to accommodate a vent valve 25 preferably a shut-off valve.
  • the liquids collecting in the lower zone 26 of the cap are filtered through a net or filter 27 provided at the base of the pipes assembly, before being suctioned and reintroduced into the circulation.
  • the accumulator according to the present invention is particularly but not exclusively adapted for systems provided with Carbon Dioxide (CO2) as a refrigerant.
  • CO2 Carbon Dioxide
  • the pipes assembly has an inflow fitting 41 and an outflow fitting 42 adapted to be inserted into the inner portion of the connections 14a and 14b respectively and at least one of which is adapted to be inserted through a quick connector 44.
  • the quick connector 44 can be conveniently provided at the end of the inflow fitting 41 or outflow fitting 42 or both.
  • the quick connector 44 is in the form of a tubular element provided with grooves 59 which divide the walls of the element into a plurality of indents 56 ending in abutments 57 adapted to snap-engage into seats 57' correspondingly made in the bottom 12.
  • the quick connector 44 there are at least two flaps 58 made close to the end portion of the inflow fitting (or the outflow pipe) and meant to hold the connector 12 engaged against the bottom through deformation.
  • the inflow fitting 41 can be made in a substantially cylindrical shape to be fitted into the inflow connection 14a or else as in figure 1d it can be provided with a conical portion 41' arranged facing the inflow connection 14a, to optimise fluid inflow.
  • the inflow fitting 41 is provided with a quick connector 44.
  • the liquid/gas separation of the refrigerant flow preferably CO2
  • the liquid/gas separation of the refrigerant flow is provided for at the entrance of the accumulator, due to a round diffuser diaphragm 49 which forces the fluid to deviate and allows it to flow down along the sides of the tubular element, the liquid thus settles at the bottom of the same while the gas is suctioned by the central pipe 43, follows the loop path and is conveyed to the outflow pipe.
  • the central pipe 43 has a substantially U-shaped path provided with loops and a loop close to the base of the accumulator provides for a housing 45 for a dehydrating agent container 46.
  • a suction pipe 51 is made at the entrance of the central pipe 43 through which the refrigerant in gaseous phase after the first separation from the liquid phase is suctioned.
  • Such diffuser diaphragm forces the liquid to deviate and allows it to flow down along the sides, thus the liquid settles at the bottom 26 of the accumulator while the gas is suctioned by the suction pipe 51 at the entrance of the central pipe 43 and follows the loop path to be then conveyed to the inflow fitting 42 which provides the end section of the central body.
  • the difference of level provided between the inflow fitting 41 and the suction pipe 51 of the pipes assembly 40 allows to prevent flooding of the inflowing refrigerant and thus allows direct suction of the refrigerant in gaseous phase into the pipes assembly 40.
  • the refrigerant Before being discharged from the outflow pipe 42 the refrigerant is passed through a screen filter 48 provided fixed in an expansion vessel 47 arranged along the central pipe 43 in such a manner that the fluid expands tending to evaporate as much as possible and releases any impurities drawn along.
  • the diffuser diaphragm 49 is provided with a support of a layer of absorbing material 53, such as a felt or other similar material, and, if required, it is provided with holes 52 through which the liquid phase flows.
  • a layer of absorbing material 53 such as a felt or other similar material
  • Such support can be provided only on one portion of the annular diffuser diaphragm 49, for example a section 54 directly facing the inflow fitting 41.
  • blocks 33 on which the abovementioned pipes 31, 32 are brazed are used.
  • the refrigerant inlet 31 and outlet 32 pipes can be joined to the corresponding blocks through the insertion of the pipe into the corresponding block and subsequent mechanical deformation of the pipe to adhere it against the internal walls of the block thus providing the required seal.
  • Each block 33 is provided with a projecting portion 34 adapted to be inserted into the corresponding connection 14a or 14b and provided with a sealing system.
  • the block is fixed by means of screws 35 to be screwed into threaded holes 15 made on the bottom 12.
  • Connections 14a and 14b are made respectively coaxial to the inflow 41 and outflow 42 fittings in such a manner to prevent interference with refrigerant flowing into and out of the accumulator.
  • the accumulator 10 for an automotive refrigeration system comprises a pipes assembly 60 which in turn comprises the diffuser diaphragm 49' joined to the pipes assembly and having an internal diameter slightly smaller than the internal diameter of the tubular element 11.
  • the diffuser diaphragm 49' is provided with spacers 66 adapted to keep the diffuser diaphragm 49' centred and spaced from the walls of the tubular element 11.
  • a section 65 of the diffuser diaphragm 49' is made similar to a seat 67 to accommodate an absorbing element 64 provided with a framework 69 adapted to be arranged and engaged below abutments 70 provided along the sides of the seat 67.
  • the base of the seat 67 is provided with holes 68 for the passage of the fluid.
  • an inflow fitting 41 is mounted provided with a conical portion 41' to be arranged facing the connection at the inflow connection 14a, to optimise fluid inflow.
  • Raised along the internal profile of the section 65 is a separation element 63 onto which the inflow fitting 41 might be fixed and which is intended for withholding the fluid flowing into the accumulator while this passes through the absorbing element 64, in such a manner to prevent the fluid from flooding over the entire diffuser diaphragm 49'.
  • a suction pipe 51 connected from the opposite side of the diffuser diaphragm 49' to the entrance of the central pipe is elevated from the diffuser diaphragm 49', thus performing the suction of the fluid made up of 95% or more of gas, avoiding suction of liquid phases.
  • the suction pipe 51 is made in the form of a cylindrical capsule 61 provided with walls made of a net or a filtering element 62.
  • the central pipe 43 does not require an expansion vessel and screen filter in that filtration is performed in advance outside the central pipe 43 through the filtering element 62.
  • vat 64 for accommodating the drying agent sachet is provided outside the central pipe.
  • an accumulator 10 for an automotive refrigeration system comprising a tubular casing element 11 adapted to accommodate a pipes assembly 40, 60 within which the refrigerant flows, and being provided with a bottom 12 adapted to close a first end 11' of the tubular element 11 and provided with a pair of connections 14a, 14b respectively for the refrigerant inlet 31 and outlet 32 pipes, and closable in a sealed manner at a second end 11'' of the tubular element 11 opposite to the first, by means of a cap 20.
  • the method comprises the steps of:

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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)
  • Air-Conditioning For Vehicles (AREA)

Claims (2)

  1. Accumulateur (10) pour un système de réfrigération d'automobile comprenant un élément de carter tubulaire (11) adapté pour loger un ensemble de conduites (40, 60) au sein duquel un fluide frigorigène s'écoule ensuite, dans lequel il est muni d'un fond (12) adapté pour fermer une première extrémité (11') de l'élément tubulaire (11) et muni d'une paire de raccords (14a, 14b) respectivement pour des conduites d'entrée (31) et de sortie (32) de fluide frigorigène, et dans lequel il peut être fermé de manière étanche à une seconde extrémité (11") de l'élément tubulaire (11) opposée à la première, au moyen d'un capuchon (20), dans lequel ledit accumulateur de forme sensiblement cylindrique est muni dudit élément tubulaire (11) et dudit capuchon (20) constitués d'aluminium et dudit ensemble de conduites (40) constitué de plastique, dans lequel ledit ensemble de conduites (40) est constitué en deux coques plastiques soudées l'une à l'autre, dans lequel le capuchon (20) est constitué en forme de dôme et destiné à être au moins partiellement inséré dans l'élément tubulaire (11), au moyen d'une portion d'insertion (21) avec un diamètre plus petit par rapport au diamètre interne de l'élément tubulaire (11) et se terminant avec une butée circonférentielle (22) sur laquelle, par le biais d'un soudage par explosion à impulsions magnétiques, une portion d'extrémité (13) de l'extrémité (11") de l'élément tubulaire (11) est déformée et façonnée jusqu'à ce que les plans cristallins des surfaces en contact des deux pénètrent l'un dans l'autre en formant sensiblement un corps unique et en obtenant ainsi l'étanchéité.
  2. Accumulateur (10) pour un système de réfrigération d'automobile comprenant un élément de carter tubulaire (11) adapté pour loger un ensemble de conduites (40, 60) au sein duquel un fluide frigorigène s'écoule ensuite, dans lequel il est muni d'un fond (12) adapté pour fermer une première extrémité (11') de l'élément tubulaire (11) et muni d'une paire de raccords (14a, 14b) respectivement pour des conduites d'entrée (31) et de sortie (32) de fluide frigorigène, et dans lequel il peut être fermé de manière étanche à une seconde extrémité (11") de l'élément tubulaire (11) opposée à la première, au moyen d'un capuchon (20), dans lequel ledit accumulateur de forme sensiblement cylindrique est muni dudit élément tubulaire (11) et dudit capuchon (20) constitués d'aluminium et dudit ensemble de conduites (40) constitué de plastique, dans lequel ledit ensemble de conduites (40) est constitué en deux coques plastiques soudées l'une à l'autre, dans lequel le capuchon (20) est constitué de forme sensiblement plate et destiné à être au moins partiellement inséré dans l'élément tubulaire (11), au moyen d'une portion d'insertion (21) avec un bord circonférentiel (21') ayant un diamètre plus petit par rapport au diamètre interne de l'élément tubulaire (11) et se terminant avec une butée circonférentielle (22), sur ledit bord circonférentiel (21') et sur ladite butée circonférentielle (22), une portion d'extrémité (13) de l'extrémité (11") de l'élément tubulaire (11) étant déformée et façonnée au moyen d'un soudage par explosion à impulsions magnétiques jusqu'à ce que les plans cristallins des surfaces en contact des deux pénètrent l'un dans l'autre en formant sensiblement un corps unique et en obtenant ainsi l'étanchéité.
EP08702213.3A 2007-01-08 2008-01-07 Accumulateur pour système de réfrigération d'automobile Active EP2102566B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT000018A ITMI20070018A1 (it) 2007-01-08 2007-01-08 Accumulatore per impianto di refrigerazione automobilistico
PCT/IB2008/000049 WO2008084384A2 (fr) 2007-01-08 2008-01-07 Accumulateur pour système de réfrigération d'automobile

Publications (2)

Publication Number Publication Date
EP2102566A2 EP2102566A2 (fr) 2009-09-23
EP2102566B1 true EP2102566B1 (fr) 2020-09-02

Family

ID=39609111

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08702213.3A Active EP2102566B1 (fr) 2007-01-08 2008-01-07 Accumulateur pour système de réfrigération d'automobile

Country Status (3)

Country Link
EP (1) EP2102566B1 (fr)
IT (1) ITMI20070018A1 (fr)
WO (1) WO2008084384A2 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1035388A2 (fr) * 1999-03-11 2000-09-13 Hansa Metallwerke Ag Accumulateur pour un appareil de climatisation travaillant selon le principe d' "orifice", en particulier pour un appareil de climatisation de véhicule
EP1132696A1 (fr) * 2000-03-08 2001-09-12 Hansa Metallwerke Ag Accumulateur pour un appareil de climatisation travaillant selon le principe d' "orifice", en particulier pour un appareil de climatisation de véhicule
DE102004032288B3 (de) * 2004-07-02 2005-09-01 Hansa Metallwerke Ag Akkumulator für eine Klimaanlage, insbesondere Fahrzeug-Klimaanlage

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4651540A (en) * 1986-03-21 1987-03-24 Tecumseh Products Company Suction accumulator including an entrance baffle
US4773474A (en) * 1987-08-12 1988-09-27 Modine Manufacturing Company Snap on fillerneck assembly for radiators
FR2626660B1 (fr) * 1988-02-02 1990-07-06 Hutchinson Sa Dispositif d'assemblage pour un ensemble echangeur de chaleur/raccord tubulaire
JPH0711335Y2 (ja) * 1989-01-30 1995-03-15 サンデン株式会社 熱交換器
JPH0648283Y2 (ja) * 1989-03-13 1994-12-12 カルソニック株式会社 リキッドタンク
JP3159805B2 (ja) * 1992-10-12 2001-04-23 昭和アルミニウム株式会社 熱交換器
JP3212730B2 (ja) * 1993-01-20 2001-09-25 昭和電工株式会社 熱交換器
US5787728A (en) * 1997-01-21 1998-08-04 Carrier Corporation Suction accumulator destratifier
DE19755297C2 (de) * 1997-12-12 1999-10-28 Man Nutzfahrzeuge Ag Fahrzeugbehälter mit modularem Anschlußteil
DE10300801B3 (de) * 2003-01-13 2004-06-24 Hansa Metallwerke Ag Akkumulator für eine Klimaanlage, insbesondere Fahrzeugklimaanlage
GB0303398D0 (en) * 2003-02-14 2003-03-19 Ball Burnishing Mach Tools Improved means of impact forming and welding
JP4096832B2 (ja) * 2003-07-22 2008-06-04 株式会社デンソー 冷凍サイクル用配管継手
US7287399B2 (en) * 2004-02-17 2007-10-30 Obrist Engineering Gmbh Collector for the liquid phase of the working medium of an air-conditioning system
DE102004055342A1 (de) * 2004-11-16 2006-05-18 Behr Gmbh & Co. Kg Kältespeicher-Akkumulator

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1035388A2 (fr) * 1999-03-11 2000-09-13 Hansa Metallwerke Ag Accumulateur pour un appareil de climatisation travaillant selon le principe d' "orifice", en particulier pour un appareil de climatisation de véhicule
EP1132696A1 (fr) * 2000-03-08 2001-09-12 Hansa Metallwerke Ag Accumulateur pour un appareil de climatisation travaillant selon le principe d' "orifice", en particulier pour un appareil de climatisation de véhicule
DE102004032288B3 (de) * 2004-07-02 2005-09-01 Hansa Metallwerke Ag Akkumulator für eine Klimaanlage, insbesondere Fahrzeug-Klimaanlage

Also Published As

Publication number Publication date
ITMI20070018A1 (it) 2008-07-09
WO2008084384A2 (fr) 2008-07-17
EP2102566A2 (fr) 2009-09-23
WO2008084384A3 (fr) 2009-04-09

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