EP1239244A1 - Echangeur de chaleur de type étagère - Google Patents

Echangeur de chaleur de type étagère Download PDF

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Publication number
EP1239244A1
EP1239244A1 EP01830154A EP01830154A EP1239244A1 EP 1239244 A1 EP1239244 A1 EP 1239244A1 EP 01830154 A EP01830154 A EP 01830154A EP 01830154 A EP01830154 A EP 01830154A EP 1239244 A1 EP1239244 A1 EP 1239244A1
Authority
EP
European Patent Office
Prior art keywords
manufactured article
heat exchanger
shelves
coil
along
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.)
Withdrawn
Application number
EP01830154A
Other languages
German (de)
English (en)
Inventor
Beniamino Zabbialini
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.)
Artal Italiana SpA
Original Assignee
Artal Italiana SpA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Artal Italiana SpA filed Critical Artal Italiana SpA
Priority to EP01830154A priority Critical patent/EP1239244A1/fr
Publication of EP1239244A1 publication Critical patent/EP1239244A1/fr
Withdrawn legal-status Critical Current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
    • F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
    • F28F3/12—Elements constructed in the shape of a hollow panel, e.g. with channels
    • F28F3/14—Elements constructed in the shape of a hollow panel, e.g. with channels by separating portions of a pair of joined sheets to form channels, e.g. by inflation
    • 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
    • F25B39/00—Evaporators; Condensers
    • F25B39/02—Evaporators
    • F25B39/022—Evaporators with plate-like or laminated elements
    • F25B39/024—Evaporators with plate-like or laminated elements with elements constructed in the shape of a hollow panel
    • 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
    • F25D25/00—Charging, supporting, and discharging the articles to be cooled
    • F25D25/02—Charging, supporting, and discharging the articles to be cooled by shelves
    • F25D25/028—Cooled supporting means

Definitions

  • the present invention relates to a shelf-type heat exchanger (evaporator).
  • the present invention relates to a shelf-type heat exchanger for refrigerators, upright freezers and similar apparatuses.
  • an upright freezer of the traditional type provides for the presence of a plastic cabinet containing within it the heat exchanger (evaporator) formed by metal shelves on which the foodstuffs to be preserved are stored.
  • Such shelves are connected to one another via the same piping which runs through the shelf itself by one or more welds.
  • the temperature of the cabinet is kept low by virtue of the passage of a refrigerant substance which runs through the piping of the heat exchanger.
  • the shelves of the heat exchanger are also provided with a tubular coil through which the refrigerant substance runs.
  • the presence of the coil along the shelves makes it possible to obtain uniform refrigeration of the shelf itself.
  • the tube of the coil is at present applied on the surface of the shelves and of the back of the cabinet by means of welding or crimping, or the said tubular coil may be premoulded inside the shelves and the back by means of the technology known as roll bonding.
  • the latter provides for the roll bonding of two plates of which one bears a screen-printed channel line shaped in accordance with the desired path of the coil. This bonding results in the welding of the entire surface of the two metal plates except along the screen-printed line, which is subsequently inflated with air forming the channel of the entire area enclosed by the said line.
  • Non-polluting refrigerant substance is cyclopentane. This, however, becomes dangerous when it comes into contact with heat or energy sources. In such cases, the leakage of the said substance from the heat exchanger coil, in addition to contaminating the foodstuffs, could, once the refrigeration cabinet has become saturated, come into contact with some electrical component and result in the explosion of the said freezer.
  • the problem on which the present invention is based is therefore that of providing a shelf-type heat exchanger which overcomes the above drawbacks.
  • a further object of the present invention is a method of manufacturing the heat exchanger according to the invention, as described in the appended method claims.
  • Figure 1 shows a view from above of the heat exchanger according to the present invention in folded-out form.
  • Figure 1a shows a view in lateral section of a detail of Figure 1.
  • FIG. 2 shows a view from above, in section, of the heat exchanger of Figure 1.
  • Figure 3 shows a perspective view of an embodiment of the heat exchanger according to the present invention.
  • Figure 4 shows a perspective view of a second embodiment of the heat exchanger according to the present invention.
  • Figure 5 shows a perspective view of a third embodiment of the heat exchanger according to the present invention.
  • FIGs 1, 1a and 2 show the manufactured article 10 provided for the manufacture of the heat exchanger according to the present invention, formed by two plates 18a, 18b of metal material such as, for example, aluminium and alloys thereof, copper and ironaluminate having an overall thickness of between 0.4 and 2 mm, preferably 1.4 mm.
  • This manufactured article 10 is obtained by roll bonding of the two plates 18a, 18b, one of which bears a printed line shaped according to the path of the coil 20 which will carry the refrigerant substance. This bonding results in the welding of the entire surface of the two plates 18a, 18b except along the printed line. The construction of the coil 20 thus takes place by the inflation of the area enclosed by the printed line.
  • the manufactured article 10 forms, in practice, the heat exchanger in the form that has not been folded into shelves. It is of substantially rectangular shape and comprises a first head portion 11 and a second head portion 12, connected to one another via a central portion 13 which in turn is substantially rectangular and on the inner sides of which the first and second head portions 11, 12 are connected.
  • the said central portion 13 has, in proximity of the outer sides, a first and a second notch 1a, 1b parallel to the longitudinal axis of the said manufactured article 10 and such as not to run along the entire length of the outer sides but to leave unnotched portions of equal length at both ends, lateral braces 14a, 14b being defined between the said first and second notches 1a, 1b and the outer side of the central portion 13.
  • the said central portion 13 also has a notch 1c perpendicular to the longitudinal axis of the said manufactured article 10 which connects the median points of the said first and second notches 1a, 1b, the said transverse notch 1c together with the said first and second longitudinal notches 1a, 1b forming a first flat element 15a and a second flat element 15b.
  • a notch 1d which is transverse relative to the longitudinal axis of the manufactured article 10 and is such as not to join the two longitudinal notches 1a, 1b.
  • the said notch 1d terminates at its ends in respective T-shaped notches.
  • a notch 1e which is transverse relative to the longitudinal axis of the manufactured article 10 and is such as not to join the two longitudinal notches 1a, 1b, this also terminating with T-shaped notches at the ends.
  • the said notches 1d, 1e enclose a first back portion 16 positioned between the first flat element 15a and the first head portion 11 and serve the function of facilitating the folding of the first head portion 11 and of the first flat element 15a to form two shelves of the heat exchanger.
  • a notch 1f ending in a T-shaped notch at its end, while its other end perpendicularly intersects two mutually parallel notches 1g, 1h which originate at the base of the second flat element 15b.
  • the said notch 1f serves the purpose of facilitating the folding of the second head portion 12 to form a shelf of the heat exchanger.
  • the said tongue 18 divides into two the region between the second head portion 12 and the second flat element 15b, defining on the one hand the back half-portion 17a and on the other a back half-portion 17b.
  • the said first and second head portions 11, 12 and the said first flat element 15a have a plurality of notches 1i parallel to the longitudinal axis of the said manufactured article 10 whose function is to improve the ventilation within the shelves of the heat exchanger.
  • the manufactured article 10 provides for the presence of a coil 20 through which the refrigerated substance passes.
  • the coil 20 is made in the manner such as not to be interrupted by the notches 1a-1i, except in correspondence with the notch portion 1f'.
  • the coil 20 thus represents a closed circuit having a T-shaped junction 21, and is produced in a single length without transverse welds joining different sections of coil.
  • the said coil 20 is of metal such as, for example, copper, aluminium and iron and has a diameter "a" ( Figure 1a) of between 0.8 and 2.5 mm. This diameter must not in fact be less than 0.8 mm in order to prevent its falling below 0.4 mm following the foldings of the coil.
  • the coil 20 is provided along the whole of the manufactured article 10 according to the present invention, so that the refrigerant substance, entering via the capillary tube located in the tongue 18, enters directly into the second flat element 15b, proceeds into the back half-portion 17b as far as the second head portion 12, runs along the lateral brace 14a and passes from the first head portion 11 to the first flat element 15a, from where it enters the first back portion 16, then along the lateral brace 14b to the back half-portion 17a, intersecting within the tongue 18 the inlet capillary tube for the incoming refrigerant substance and then returning to the compressor.
  • the manufactured article 10 is folded in a manner such as to form a heat exchanger having four shelves in which the central shelves coincide with the first and second head portions 11, 12 of the manufactured article 10 while the outer shelves coincide with the first and second flat elements 15a, 15b of the manufactured article 10, and in which the first back portion 16 and the back half-portions 17a, 17b of the manufactured article 10 are folded onto the lateral braces 14a, 14b of the manufactured article 10.
  • the tongue 18 of the manufactured article 10 is substantially coplanar with the second flat element 15b and protrudes in an opposite direction to the shelf and substantially perpendicularly to the plane in which the back of the exchanger lies.
  • the back portion 16 forms the wall that connects the shelf comprising the first flat element 15a to the shelf comprising the first head portion 11 and the back half-portions 17a, 17b form the wall that connects the shelf comprising the second flat element 15b to the shelf comprising the second head portion 12.
  • the manufactured article 10 is obtained by first applying the technology described above, known as roll bonding, and then cutting the notches described above.
  • the heat exchanger having four shelves shown in Figure 3 is obtained by folding the manufactured article 10 in accordance with the following steps, performed in any order or simultaneously:
  • the abovementioned folding steps can be implemented in any order; for example, the fold through approximately 90° can be made first and the shelves obtained then rotated in a manner such that the first and second elements 15a, 15b, which in folded-out form were located at the centre, are the shelves at the end of the heat exchanger while the first and second head portions 11, 12, which in folded-out form were located at the end, are the shelves at the centre of the heat exchanger.
  • the folding-back of the braces through approximately 180° can be implemented first and subsequently the first and second elements 15a, 15b and the first and second head portions 11, 12 can be folded back through approximately 90° towards the outside of the plane in which the manufactured article 10 lies.
  • the tongue 18 of the manufactured article 10 which will come to be situated in a position outside the refrigerant cabinet, is connected to the compressor of the heat exchanger by means of a capillary tube.
  • the said tongue 18 houses the inlet capillary tube for the refrigerant substance in a manner such that the tip of the capillary tube enters directly into the second flat element 15b, downstream of the T-shaped junction 21, so that the refrigerant substance leaving the coil 20, at the said T-shaped junction 21, is not mixed with the incoming refrigerant substance.
  • Figure 4 shows a second embodiment of the heat exchanger according to the present invention, which differs from that in Figure 3 only in the fact that the first flat element 15a is of smaller size than the second flat element 15b of the manufactured article 10.
  • the effect of this is that the central shelves (first and second head portions 11, 12) are also at a shorter distance, in other words their distance substantially coincides with the height of the said first flat element 15a.
  • Figure 5 shows a third embodiment of the heat exchanger according to the present invention, which differs from that in Figure 3 in that the lateral braces 14a, 14b are replaced with a single brace 14, substantially in a central position of the said central element 13 which, passing through the first and second flat elements 15a, 15b, results in the obtainment of outer shelves divided into two parts.
  • a first advantage is that the heat exchanger can be manufactured from a manufactured article in a single piece, avoiding the welds which, as stated above, may cause leakage of the refrigerant substance.
  • the coil obtained according to the abovementioned roll bonding technology or affixed by welds will in any event be in a single length and not, as in the prior art, formed by different pieces of coil welded together.
  • a second advantage is that the heat exchanger is obtained by means of a method of simple folding which can even be performed manually.
  • a third advantage of the shelf-type heat exchanger according to the present invention is that it is adaptable to various needs. Specifically, the size, the number of shelves and their mutual distances can be adjusted by varying the size of the shelves and of the brace and the width of the back portions 16, 17a, 17b.
  • the notches 1i may also be present on the second flat element 15b or they may be entirely absent.
  • notches 1d, 1e and 1f may be replaced by simple lines of weakness to facilitate folding or they may be simple theoretical fold lines.
  • An example of a theoretical fold line 1m is that positioned between the base of the second flat element 15b and the back portion 17 used to facilitate the folding-back of the shelf of the heat exchanger comprising the said second flat element 15b.
  • the coil 20, then, may also be applied by electrowelding to the surface of the manufactured article 10 and not merely obtained by inflation within the two plates that form the manufactured article as described above.

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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)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
EP01830154A 2001-03-07 2001-03-07 Echangeur de chaleur de type étagère Withdrawn EP1239244A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP01830154A EP1239244A1 (fr) 2001-03-07 2001-03-07 Echangeur de chaleur de type étagère

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP01830154A EP1239244A1 (fr) 2001-03-07 2001-03-07 Echangeur de chaleur de type étagère

Publications (1)

Publication Number Publication Date
EP1239244A1 true EP1239244A1 (fr) 2002-09-11

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ID=8184433

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EP01830154A Withdrawn EP1239244A1 (fr) 2001-03-07 2001-03-07 Echangeur de chaleur de type étagère

Country Status (1)

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EP (1) EP1239244A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1843103A3 (fr) * 2006-04-03 2010-11-24 Kamal Mostafa Moyens parcourus d'un liquide pour climatiser une pièce
ITTO20091008A1 (it) * 2009-12-21 2011-06-22 Indesit Co Spa Apparecchio refrigerante con evaporatore roll-bond
CN111735232A (zh) * 2020-07-21 2020-10-02 浙江星星冷链集成股份有限公司 一种用于冰箱的蒸发器装置

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3165150A (en) * 1959-08-14 1965-01-12 Reynolds Metals Co Heat-exchanger having selectively spaced heat-exchange shelving integrally formed therein
DE2060796A1 (de) * 1970-12-10 1972-06-29 Schmoele Metall R & G Einstueckiger Kuehlmittelverdampfer fuer Kuehl- und Gefrierschraenke,Kuehltruhen od.dgl.
GB1375335A (fr) * 1972-05-12 1974-11-27
FR2574532A1 (fr) * 1984-12-11 1986-06-13 Sueddeutsche Kuehler Behr Echangeur de chaleur destine en particulier aux evaporateurs ou condenseurs parcourus par le liquide frigorigene d'equipements de climatisation de vehicule, et procede de fabrication associe
DE4442817A1 (de) * 1994-12-01 1996-06-05 Krupp Vdm Gmbh Verdampfer für ein Kompressorkühlgerät / Kapillarkanal
EP0843138A1 (fr) * 1996-11-14 1998-05-20 OCEAN S.p.A. Un échangeur de chaleur tel qu'un condenseur et/ou un évaporateur pour un réfrigérateur, un congélateur ou une combinaison des deux ou analogue

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3165150A (en) * 1959-08-14 1965-01-12 Reynolds Metals Co Heat-exchanger having selectively spaced heat-exchange shelving integrally formed therein
DE2060796A1 (de) * 1970-12-10 1972-06-29 Schmoele Metall R & G Einstueckiger Kuehlmittelverdampfer fuer Kuehl- und Gefrierschraenke,Kuehltruhen od.dgl.
GB1375335A (fr) * 1972-05-12 1974-11-27
FR2574532A1 (fr) * 1984-12-11 1986-06-13 Sueddeutsche Kuehler Behr Echangeur de chaleur destine en particulier aux evaporateurs ou condenseurs parcourus par le liquide frigorigene d'equipements de climatisation de vehicule, et procede de fabrication associe
DE4442817A1 (de) * 1994-12-01 1996-06-05 Krupp Vdm Gmbh Verdampfer für ein Kompressorkühlgerät / Kapillarkanal
EP0843138A1 (fr) * 1996-11-14 1998-05-20 OCEAN S.p.A. Un échangeur de chaleur tel qu'un condenseur et/ou un évaporateur pour un réfrigérateur, un congélateur ou une combinaison des deux ou analogue

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1843103A3 (fr) * 2006-04-03 2010-11-24 Kamal Mostafa Moyens parcourus d'un liquide pour climatiser une pièce
ITTO20091008A1 (it) * 2009-12-21 2011-06-22 Indesit Co Spa Apparecchio refrigerante con evaporatore roll-bond
CN111735232A (zh) * 2020-07-21 2020-10-02 浙江星星冷链集成股份有限公司 一种用于冰箱的蒸发器装置

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