EP1484562B1 - Accumulateur de frigories - Google Patents

Accumulateur de frigories Download PDF

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Publication number
EP1484562B1
EP1484562B1 EP04012973A EP04012973A EP1484562B1 EP 1484562 B1 EP1484562 B1 EP 1484562B1 EP 04012973 A EP04012973 A EP 04012973A EP 04012973 A EP04012973 A EP 04012973A EP 1484562 B1 EP1484562 B1 EP 1484562B1
Authority
EP
European Patent Office
Prior art keywords
frigorie
profiled section
housing
accumulator unit
unit according
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 - Lifetime
Application number
EP04012973A
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German (de)
English (en)
Other versions
EP1484562A1 (fr
Inventor
Giuseppe Morano
Giovanni Rosso
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.)
Cold Car SpA
Original Assignee
Cold Car SpA
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Filing date
Publication date
Application filed by Cold Car SpA filed Critical Cold Car SpA
Publication of EP1484562A1 publication Critical patent/EP1484562A1/fr
Application granted granted Critical
Publication of EP1484562B1 publication Critical patent/EP1484562B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D3/00—Devices using other cold materials; Devices using cold-storage bodies
    • F25D3/005—Devices using other cold materials; Devices using cold-storage bodies combined with heat exchangers

Definitions

  • the present invention relates to a frigorie accumulator unit of the type defined in the preamble of claim 1.
  • EP-A-0 902 243 discloses a frigorie accumulator unit of this type including an extruded profiled section made in one piece of metal, which defines a chamber, for a frigorie storage substance, as well as a single external duct which is integral therewith for the flow of a refrigerant fluid.
  • the extruded profiled section also defines an external channel-shaped appendix adapted to be engaged by the refrigerant duct of another adjacent identical accumulator unit.
  • Frigorie accumulators are used, for example, as refrigeration units in the cells of refrigerated delivery vans which are used for the short-range transport and distribution of products at low temperature such as ice creams, frozen foods and the like, and so-called "fresh" products.
  • Frigorie accumulators according to the prior art are produced substantially in two main types which are distinguished by the material which is used predominantly for their manufacture.
  • a first type of accumulator which is made of plastics material, has a low weight but suffers from problems of reliability. Plastics materials in fact present problems when they are subjected to low operating temperatures, to considerable expansions/contractions, and to vibrations during transportation.
  • Accumulators of a second type which are made of stainless steel, have good reliability and optimal behaviour at low temperatures but are quite expensive with regard both to the material used and to the operations that are necessary during manufacture.
  • An object of the present invention is to provide a frigorie accumulator unit which can be produced easily and inexpensively and which has optimal operative efficiency and good reliability.
  • the accumulator according to the invention can advantageously be made of aluminium or alloys thereof and is therefore very light.
  • thermal conductivity is extremely uniform along the accumulator and the rate of freezing of the storage substance is optimal.
  • the accumulator according to the invention is also very reliable since, in practice, no relative movement takes place between constituent parts in the longitudinal direction (corresponding to the direction of extrusion of the profiled element in the accumulator).
  • a frigorie accumulator is generally indicated 1 in Figure 1 .
  • the accumulator 1 comprises a housing 2 formed by a substantially tubular extruded profiled section 3 to the ends of which respective plate-shaped end closure elements 4a, 4b are welded (see also Figure 2 ).
  • the extruded profiled section 3 and the end elements 4a and 4b are advantageously made of aluminium or alloys thereof.
  • the extruded profiled section 3 defines a tubular wall 5 having an oblong cross-section.
  • the region inside the housing 2, that is, the region delimited by the outer wall 5 of the extruded profiled section 3 and by the end closure elements 4a, 4b, can hold a frigorie storage substance such as a eutectic solution of a type known per se.
  • the extruded profiled section 3 has two internal, tubular, shaped portions 6a and 6b which are integral therewith and which form two branches or portions of a duct for a refrigerant fluid, which will be described further below.
  • the internal, tubular, shaped portions 6a and 6b of the extruded profiled section 3 can be interconnected by a longitudinal wall or partition 7 integral with the profiled section.
  • said internal, tubular, shaped portions 6a and 6b can be connected to the external wall 5 of the profiled section 3 by means of respective connecting walls or partitions 8 and 9 which are also integral with the profiled section 3.
  • the connecting partitions 7, 8 and 9 are preferably coplanar as can be seen, for example, in Figure 3 . These partitions divide the region inside the housing 2 into two compartments or chambers, indicated 10a and 10b. An opening defined in at least one connecting partition puts these compartments or chambers 10a, 10b into communication with one another. In the embodiment shown, the opening is in the form of a triangular notch 11 ( Figures 2 , 3a and 3b ) in the intermediate connecting partition 7.
  • the end closure elements 4a, 4b of the housing 2 have respective openings 12a, 12b and 13a, 13b ( Figure 2 ) in positions corresponding to the ends of the internal, tubular, shaped portions 6a and 6b of the extruded profiled section 3.
  • the end elements 4a and 4b are welded to the ends of the extruded profiled section 3.
  • these end elements 4a, 4b are placed in abutment with the ends of the profiled section 3 and are welded to said profiled section by TIG or laser welding in the region of their external profiles and of the edges or profiles of their openings 12a, 12b and 13a, 13b.
  • the end elements 4a, 4b are brazed to the ends of the extruded profiled section 3, after the end edges of the interconnecting partitions 7, 8 and 9 have been milled to allow the end elements 4a, 4b to be inserted in the corresponding end portions of the profiled section 3; the end elements 4a, 4b thus extend inside the external wall 5 of the profiled element and around the ends of the internal tubular shaped portions 6a, 6b.
  • the frigorie accumulator 1 further comprises a U-shaped or C-shaped portion of tubing 15 made of aluminium or an alloy thereof, the ends of which are inserted and welded in the openings of the end closure elements 4a, 4b.
  • the tubing 15 interconnects the internal tubular shaped portions 6a, 6b of the extruded profiled section 3 in series with one another, forming a duct to which a refrigerant fluid for removing calories from the storage substance held in the communicating chambers 10a, 10b can be admitted in operation.
  • the tubing 15 is connected to the end closure element 4b and the openings 12a, 12b of the other end element 4a enable the above-described duct to be connected to an external system such as a refrigeration system of a type known per se.
  • At least one opening 16 is formed in one end element, advantageously in the end element indicated 4a; the opening 16 can be sealed in a fluid-tight manner known per se and enables a frigorie storage substance to be introduced into the region 10a, 10b defined inside the housing 2 of the accumulator.
  • the extruded profiled section 3 preferably but not necessarily has, on one side, an integral, flange-like, longitudinal, shaped portion, indicated 17 in the drawings.
  • This shaped portion can be used for the fixing of the frigorie accumulator 1 to a supporting structure such as the wall of a cell of a refrigerated delivery van.
  • the external wall 5 of the extruded profiled section 3 may advantageously have external, longitudinal, shaped portions formed integrally in the extrusion for enabling accessory elements to be connected to the accumulator 1.
  • Figure 4 shows such an external, longitudinal, shaped portion 18 which has a substantially inverted T-shape and can be used for supporting flat cover panels 19.
  • the extruded profiled section 3 has two opposed, longitudinal, shaped portions 20 and 21 which are also substantially T-shaped and enable finned frigorie dispersers, such as that generally indicated 22, to be connected to the accumulator.
  • the extruded profiled element 3 may comprise internal, longitudinal, shaped portions which are formed integrally therewith during the extrusion process and which extend into the region 10a, 10b that is intended to hold the storage substance.
  • Figure 6 shows various substantially fin-like shaped portions of this type, indicated 23.
  • the internal, tubular, shaped portions 6a, 6b may also advantageously have respective external, integral, shaped portions which extend into the region 10a, 10b holding the storage substance. Such shaped portions are indicated 24 in Figure 6 .
  • the extruded profiled section 3 has a plurality of integral, external, tubular shaped portions, indicated 25. These shaped portions can be used in order to bring about the flow of a heating fluid therein, in operation, when the accumulator 1 is to be defrosted.
  • the extruded profiled element 3 has a plurality of substantially channel-shaped, external, shaped portions 26 in which it is possible to engage, for example, resistive heating devices which can be activated when the accumulator is to be defrosted.
  • FIGS 9 and 10 show two embodiments of a frigorie accumulator unit according to the invention, wherein the tubular portions, or ducts, 6a and 6b are now placed externally to the housing 2.
  • parts and elements already described have again been attributed the same alphanumeric references as were used above.
  • a frigorie accumulator 1 that has an extruded profiled section 3 which does not have the longitudinal partition 7 or the connecting partitions 8 and 9, but which defines a single region, generally indicated 10, inside the housing 2.
  • the extruded profiled section 3 comprises first heat-exchange walls 5a between the region 10 inside the housing 2 and the outside environment, and second heat-exchange walls 5b between the region 10 and the refrigerant fluid contained in the duct 6a, 6b.
  • These second heat-exchange walls 5b are channel-shaped wall portions which are open towards the environment outside the profiled section 3, and can receive portions of the duct 6a, 6b which can advantageously be disposed on opposite sides of the profiled section 3.
  • the duct 6a, 6b can thus easily be disconnected from the housing 2 and is particularly safe in the event of perforation or damage since it cannot cause refrigerant fluid, which is generally subjected to high working pressure, to leak into the region 10 inside the profiled section 3.
  • Figure 9 also shows a retaining element 31 which can hold the duct portion 6b in contact with the associated channel-like heat-exchange wall 5b, in a profile 34 of the retaining element 31.
  • the retaining element 31 may be made of thermally conductive material and may be connected to the profiled section 3 by means of hooked portions 32 which can snap-engage corresponding shaped engagement portions 33 that are present on the outside of the housing 2.
  • Figure 10 shows another embodiment similar to that shown in Figure 9 in which the portions 6a, 6b of the duct are situated in the vicinity of a side 35 of the profiled section 3 which is remote from the flange-like shaped portion 17 and is provided with end appendages 36 which help to hold the duct portions 6a, 6b in contact with the second heat-exchange wall 5b.
  • Figure 11 shows a preferred embodiment of the end closure elements 4a, 4b, particularly for the embodiment shown in Figure 9 .
  • the end element 4a may advantageously be fixed to the extruded profiled section 3 by mechanical means such as, for example, screws (not shown) fitted in corresponding holes 40 formed in the peripheral end of the end element 4a and of the profiled section 3.
  • the fluid-tightness of the housing 2 is advantageously ensured by the interposition of a seal (not shown) between the end element 4a and the profiled section 3.
  • the fluid-tightness of the housing 2 can be achieved by means of silicones or other sealing means.
  • This variant of the end elements 4a, 4b is particularly advantageous: welding of the elements 4a, 4b to the profiled section 3 is thus avoided since the welding operation may be problematical owing to the nature of aluminium and of its alloys which are generally used for the manufacture of the housing 2 because of its above-mentioned thermal conductivity properties.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Preparation Of Compounds By Using Micro-Organisms (AREA)
  • Saccharide Compounds (AREA)
  • Devices That Are Associated With Refrigeration Equipment (AREA)
  • Cooling Or The Like Of Electrical Apparatus (AREA)

Claims (10)

  1. Unité d'accumulateur de frigories (1) comprenant :
    un boîtier (2) qui définit dans sa partie intérieure une chambre unique (10) destinée à maintenir une substance de stockage de frigories telle qu'une solution eutectique,
    au moins une conduite (6a, 6b) qui s'étend au moins en partie dans une relation d'échange de chaleur avec la chambre (10) à l'intérieur du boîtier (2) et est adaptée pour contenir un fluide réfrigérant destiné à éliminer les calories de la substance de stockage maintenue dans ladite chambre (10) du boîtier (2) jusqu'à cela le congèle ;
    le boîtier (2) comprenant :
    une section profilée extrudée sensiblement tubulaire (3) fabriquée à partir d'un matériau thermiquement conducteur, définissant au moins une paroi d'échange de chaleur (5a) entre la chambre (10) à l'intérieur du boîtier (2) et l'environnement à l'extérieur du boîtier (2), et au moins une autre paroi d'échange de chaleur (5b) entre la chambre (10) à l'intérieur du boîtier et le fluide réfrigérant contenu dans ladite conduite (6a, 6b), et
    un premier élément de fermeture d'extrémité et un second élément de fermeture d'extrémité (4a, 4b), adaptés pour être raccordés d'une manière étanche au fluide aux extrémités de la section profilé extrudée (3) ;
    caractérisée en ce qu' au moins l'autre paroi d'échange de chaleur comprend deux parties de paroi d'échange de chaleur (5b) qui ont la forme d'un canal et sont ouvertes en direction de l'environnement à l'extérieur de ladite section profilée (3), et en ce qu'une première et une seconde parties de conduite ou tube (6a, 6b), formées en une seule pièce, sont toutes les deux placées à l'extérieur dudit boîtier (2) et sont reçues dans lesdites parties de paroi d'échange de chaleur en forme de canal (5b) de la section profilée extrudée (3) de manière à pouvoir être facilement déconnectées du boîtier (2).
  2. Unité d'accumulateur de frigories selon la revendication 1 dans laquelle lesdites deux parties de paroi en forme de canal (5b) sont disposées sur les côtés opposés de la section de profilée extrudée (3).
  3. Unité d'accumulateur de frigories selon la revendication 1 ou la revendication 2 dans laquelle au moins un élément de retenue (31), raccordé à la section profilée extrudée (3), est associé à une partie de paroi en forme de canal (5b) et est adapté pour maintenir la partie de conduite associée (6b) dans celui-ci.
  4. Unité d'accumulateur de frigories selon la revendication 3 dans laquelle l'élément de retenue (31) est fabriqué à partir d'un matériau thermiquement conducteur.
  5. Unité d'accumulateur de frigories selon l'une quelconque des revendications 1 à 4 dans laquelle les éléments de fermeture d'extrémité (4a, 4b) sont raccordés à la section profilée (3) par des moyens de fixation et d'étanchéité.
  6. Unité d'accumulateur de frigories selon la revendication 5 dans laquelle des joints étanches aux fuites sont interposés entre les éléments de fermeture d'extrémité (4a, 4b) et la section profilée (3).
  7. Unité d'accumulateur de frigories selon l'une quelconque des revendications précédentes dans laquelle un élément de fermeture d'extrémité (4a) de la section profilée extrudée (3) présente une ouverture (16) qui est adaptée pour être fermée de manière étanche aux fuites et qui permet d'introduire la substance de stockage à l'intérieur de la chambre (10) définie à l'intérieur du boîtier (2).
  8. Unité d'accumulateur de frigories selon l'une quelconque des revendications précédentes dans laquelle la section profilée extrudée (3) présente, sur un côté, au moins une partie façonnée solidaire de type bride (17) qui est adaptée pour être utilisée pour fixer l'unité d'accumulateur (1) sur une structure de support.
  9. Unité d'accumulateur de frigories selon l'une quelconque des revendications précédentes dans laquelle la section profilée extrudée (3) présente des (premières) parties façonnées solidaires, externes, longitudinales (26) pour permettre de raccorder les éléments accessoires à l'unité d'accumulateur (1).
  10. Unité d'accumulateur de frigories selon la revendication 9 dans laquelle la section profilée extrudée (3) présente des parties façonnées de type canal, externes, longitudinales (26) qui sont solidaires avec celle-ci, qui sont adaptées pour supporter les dispositifs de chauffage destinés à dégivrer l'unité d'accumulateur (1).
EP04012973A 2003-06-04 2004-06-02 Accumulateur de frigories Expired - Lifetime EP1484562B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT000415A ITTO20030415A1 (it) 2003-06-04 2003-06-04 Accumulatore di frigorie
ITTO20030415 2003-06-04

Publications (2)

Publication Number Publication Date
EP1484562A1 EP1484562A1 (fr) 2004-12-08
EP1484562B1 true EP1484562B1 (fr) 2008-08-13

Family

ID=33156372

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04012973A Expired - Lifetime EP1484562B1 (fr) 2003-06-04 2004-06-02 Accumulateur de frigories

Country Status (4)

Country Link
EP (1) EP1484562B1 (fr)
AT (1) ATE404832T1 (fr)
DE (1) DE602004015674D1 (fr)
IT (1) ITTO20030415A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2432411B (en) * 2005-11-16 2011-02-16 L E Jackson Refrigeration beam and refrigeration apparatus incorporating the same
GB2475882B (en) * 2009-12-04 2011-11-30 L E Jackson Refrigeration beam with a compressible member and refrigeration apparatus incorporating the same
IT201700088160A1 (it) * 2017-08-01 2019-02-01 Frigotecnica Ind Chiavenna Spa Ovvero In Forma Abbreviata Fic Spa Tubo eutettico, particolarmente per la refrigerazione delle celle di furgoni frigoriferi.

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB989836A (fr) * 1962-09-24 1965-04-22 Lavorazione Leghe Leggere S.P.A.
GB2327751A (en) * 1997-07-23 1999-02-03 Zafer Muhittin Ure Thermal storage
DE19739389C2 (de) * 1997-09-09 2001-11-08 Webasto Thermosysteme Gmbh Eisspeicher-Element
ITMI20010407A1 (it) * 2001-02-28 2002-08-28 High Technology Participation Apparecchiatura particolarmente per la conservazione di prodotti deperibili ad una temperatura predeterminata

Also Published As

Publication number Publication date
ATE404832T1 (de) 2008-08-15
DE602004015674D1 (de) 2008-09-25
ITTO20030415A1 (it) 2004-12-05
EP1484562A1 (fr) 2004-12-08

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