EP0844447A2 - Procédé de fabrication d'un échangeur de chaleur et échangeur ainsi obtenu - Google Patents

Procédé de fabrication d'un échangeur de chaleur et échangeur ainsi obtenu Download PDF

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Publication number
EP0844447A2
EP0844447A2 EP97118032A EP97118032A EP0844447A2 EP 0844447 A2 EP0844447 A2 EP 0844447A2 EP 97118032 A EP97118032 A EP 97118032A EP 97118032 A EP97118032 A EP 97118032A EP 0844447 A2 EP0844447 A2 EP 0844447A2
Authority
EP
European Patent Office
Prior art keywords
pipe
heat exchanger
substantially rectilinear
coil
plate
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Withdrawn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
EP97118032A
Other languages
German (de)
English (en)
Other versions
EP0844447A3 (fr
Inventor
Gianfranco Biasoni
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.)
Electrolux Zanussi Elettrodomestici SpA
Electrolux Zanussi SpA
Original Assignee
Electrolux Zanussi Elettrodomestici SpA
Electrolux Zanussi 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 Electrolux Zanussi Elettrodomestici SpA, Electrolux Zanussi SpA filed Critical Electrolux Zanussi Elettrodomestici SpA
Publication of EP0844447A2 publication Critical patent/EP0844447A2/fr
Publication of EP0844447A3 publication Critical patent/EP0844447A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D53/00—Making other particular articles
    • B21D53/02—Making other particular articles heat exchangers or parts thereof, e.g. radiators, condensers fins, headers
    • B21D53/08—Making other particular articles heat exchangers or parts thereof, e.g. radiators, condensers fins, headers of both metal tubes and sheet metal
    • 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
    • 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
    • F28F1/14—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 longitudinally
    • F28F1/22—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 longitudinally 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
    • F25B2339/00—Details of evaporators; Details of condensers
    • F25B2339/02—Details of evaporators
    • F25B2339/023—Evaporators consisting of one or several sheets on one face of which is fixed a refrigerant carrying coil
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2210/00—Heat exchange conduits
    • F28F2210/10—Particular layout, e.g. for uniform temperature distribution
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2275/00—Fastening; Joining
    • F28F2275/02—Fastening; Joining by using bonding materials; by embedding elements in particular materials
    • F28F2275/025—Fastening; Joining by using bonding materials; by embedding elements in particular materials by using adhesives

Definitions

  • the present invention refers to a method for producing a heat exchanger adapted to be used in a refrigeration apparatus, in particular household-type or similar refrigerating equipment, as well as a heat exchanger produced with such a method.
  • An advantageous, but not sole application of this heat exchanger is as a so-called static evaporator, ie.an evaporator operating by natural convection, that is adhesive-bonded to inner walls of the refrigeration apparatus.
  • Roll Bond TM technique
  • the second technological method calls on the contrary for the use of a pipe having a circular or a D-shaped cross-section and curved in the form of a flat coil with substantially rectilinear sections and related connecting or union bends (180°-elbows), said coil being subsequently adhesive-bonded on one or more walls of the inner compartments of the refrigeration apparatus.
  • Aluminium alloys are generally used in the evaporators produced with such technologies, so that, owing to well-known soldering or brazing difficulties, a certain criticality is always present at the points in which the evaporators are joined to the remaining parts of the refrigerating circuit of the apparatus. Furthermore, the costs of the above mentioned raw material, ie. aluminium, are subject to quite frequent price fluctuations, which may be even of a quite considerable extent and clearly affect in a negative manner both production costs and the overall manufacturing economics.
  • a method of producing heat exchangers is also known in which the pipe being bent into a coil is made of an iron alloy, which undoubtedly features technological and economic uncertainties to a much smaller extent than aluminium alloys. To the purpose of compensating for the smaller heat conductivity of the material, the heat-exchange surface of the pipe must however be increased.
  • a commonly known technique consists in caulking the substantially rectilinear sections of the flat coil on a plate, which is also made of an iron alloy and is coplanar with, ie. lies in the same plane as said coil.
  • the toughness of iron alloys makes it difficult for the evaporator to be compliantly adapted to the above cited walls.
  • the subject covered by the present invention therefore relates to a manufacturing method and a heat exchanger produced with such a method, both having the characteristics as substantially recited in the appended claims.
  • a static evaporator for the freezing compartment of a household refrigeration appliance is made starting from a pipe 10, which is made of an iron alloy material and has a circular cross-section, wherein such a pipe is bent so as to obtain a desired flat-coil configuration that is formed by a plurality of substantially rectilinear and parallel sections 20 and union elbows 30 provided between each one of said sections and the next one.
  • the coiled pipe 1 is arranged on a quadrilateral plate 50 that is also made of an iron alloy material, is substantially coplanar with the pipe 10 and is provided with a plurality of parallel grooves 60 extending between two mutually opposing side edges 70 and 80 thereof.
  • evaporators 41 and 42 each one of which is made starting from semi-finished products with the above described materials and manufacturing operations.
  • the evaporators 41 and 42 (hereinafter called simply freezer evaporator and cold storage evaporator, respectively) are made starting from and consist of a single pipe 10 and comprise two plates that are generally indicated at 51 and 52, respectively.
  • the freezer evaporator 41 comprises three zones A, B, C that are made up by substantially rectilinear and parallel sections 21 of the pipe 10, with the related union elbows 31, and the therewith associated portions of the plate 51.
  • it is the substantially rectilinear of the pipe 10 which are indicated with the reference numerals 15 and 16, and whose longitudinal axes are indicated with X-X and Y-Y, respectively, that are particularly highlighted in the drawings.
  • the cold storage evaporator 42 is on the contrary formed by a single group of substantially rectilinear, parallel sections 22 and related union elbows 32 of the pipe 10, as well as by the therewith associated plate 52.
  • the hydraulic connection of the two evaporators 41 and 42 with each other is brought about by a pipe union 17 arranged outside the outer contour of the plates 51 and 52, for instance perpendicularly to the above mentioned rectilinear sections 21 and 22 of the pipe 10.
  • the zones A, B and C of the freezer evaporator 41 are therefore so shaped as to be able to more fittingly conform to the outer surface (not exposed to view) of the walls 91, 92 and 93 of the freezing compartment 90 of a household combined freezer-fridge refrigeration appliance.
  • the above mentioned substantially rectilinear, parallel sections 15 and 16 of the pipe 10 are so arranged as to be eventually positioned along the corners of the compartment 90 that are formed by the walls 91, 92 and 92, 93, respectively.
  • the torques used to clamp the pipe end portions in the vices 12 and 14 are of course so selected as to prevent the pipe 10 from being damaged, ie.
  • the mechanical properties of the iron alloys and the wall thicknesses of both the pipe 10 and the plate 50 are so selected as to prevent the freezer evaporator 41 from showing any tendency to lose its C-shaped configuration, ie. to resume its original flat shape, alter the above mentioned operations of torsional deformation and right-angle bending.
  • the operation can be started to bend in the required manner the sections of the pipe 10 that are not associated with the plates 51 and 52, and in particular the pipe union 17, so as to conform them to the particular requirements placed by the other parts that make up the refrigeration apparatus.
  • this phase of the manufacturing process is a substantially conventional one, so that no further explanation is felt to be necessary here.
  • the zones A, B, C of the freezer evaporator 41 are attached by adhesive-bonding to the unexposed (ie. not in view) surface of the afore mentioned walls 91, 92 and 93 of the freezing compartment 90, while the cold storage evaporator 42 is attached by adhesive-bonding to the rear wall 96 of the cold storage compartment 95 (see Figure 4), wherein also these adhesive-bonding operations are carried out in accordance with techniques that are well-known to those skilled in the art.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Geometry (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Separation By Low-Temperature Treatments (AREA)
EP97118032A 1996-11-26 1997-10-17 Procédé de fabrication d'un échangeur de chaleur et échangeur ainsi obtenu Withdrawn EP0844447A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITPN960065 1996-11-26
ITPN960065 IT1289400B1 (it) 1996-11-26 1996-11-26 Metodo per produrre uno scambiatore di calore per un apparecchio refrigerante e scambiatore di calore cosi' prodotto

Publications (2)

Publication Number Publication Date
EP0844447A2 true EP0844447A2 (fr) 1998-05-27
EP0844447A3 EP0844447A3 (fr) 2000-04-12

Family

ID=11395201

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97118032A Withdrawn EP0844447A3 (fr) 1996-11-26 1997-10-17 Procédé de fabrication d'un échangeur de chaleur et échangeur ainsi obtenu

Country Status (2)

Country Link
EP (1) EP0844447A3 (fr)
IT (1) IT1289400B1 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0917919A3 (fr) * 1997-11-06 2001-04-11 Whirlpool Corporation Procédé de fabrication d'un évaporateur monobloc, et évaporateur obtenu
WO2002053371A1 (fr) * 2001-01-08 2002-07-11 Flamm Aktiengesellschaft Procede de production de plaques d'evaporateur
WO2003001135A1 (fr) * 2001-05-01 2003-01-03 Romero Beltran Julian Echangeur thermique de type plaque-tube
WO2006069783A1 (fr) * 2004-12-28 2006-07-06 Liebherr-Hausgeräte Ochsenhausen GmbH Appareil de refrigeration et de congelation
EP1746366A1 (fr) * 2005-07-22 2007-01-24 Liebherr-Hausgeräte Ochsenhausen GmbH Condenseur du type tuyau-plaque pour des installations frigorifiques
CN100520252C (zh) * 2004-12-28 2009-07-29 利勃海尔-家用电器奥克森豪森有限责任公司 冷藏和冷冻单元
DE102016003547A1 (de) * 2016-03-22 2017-09-28 Liebherr-Hausgeräte Ochsenhausen GmbH Kühl- und/oder Gefriergerät

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2297219A (en) * 1938-02-03 1942-09-29 Hintze Rudolf Evaporator for refrigerating apparatus of the compression type
US2306772A (en) * 1940-03-12 1942-12-29 Mullins Mfg Corp Sheet and tube evaporator
US2562638A (en) * 1947-05-02 1951-07-31 Nash Kelvinator Corp Refrigerated tank
US2741095A (en) * 1952-10-07 1956-04-10 Gen Motors Corp Refrigeratior having multiple section evaporator
US2940737A (en) * 1955-04-08 1960-06-14 Houdaille Industries Inc Heat exchanger
IT213782Z2 (it) * 1988-05-04 1990-03-01 Eurodomestici Ind Riunite Evaporatore per frigoriferi statici.

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0917919A3 (fr) * 1997-11-06 2001-04-11 Whirlpool Corporation Procédé de fabrication d'un évaporateur monobloc, et évaporateur obtenu
WO2002053371A1 (fr) * 2001-01-08 2002-07-11 Flamm Aktiengesellschaft Procede de production de plaques d'evaporateur
WO2003001135A1 (fr) * 2001-05-01 2003-01-03 Romero Beltran Julian Echangeur thermique de type plaque-tube
US7140425B2 (en) 2001-05-01 2006-11-28 Julian Romero-Beltran Plate-tube type heat exchanger
CN1297795C (zh) * 2001-05-01 2007-01-31 朱利安·罗梅罗－贝尔特伦 管板型热交换器
WO2006069783A1 (fr) * 2004-12-28 2006-07-06 Liebherr-Hausgeräte Ochsenhausen GmbH Appareil de refrigeration et de congelation
CN100520252C (zh) * 2004-12-28 2009-07-29 利勃海尔-家用电器奥克森豪森有限责任公司 冷藏和冷冻单元
EP1746366A1 (fr) * 2005-07-22 2007-01-24 Liebherr-Hausgeräte Ochsenhausen GmbH Condenseur du type tuyau-plaque pour des installations frigorifiques
DE102016003547A1 (de) * 2016-03-22 2017-09-28 Liebherr-Hausgeräte Ochsenhausen GmbH Kühl- und/oder Gefriergerät

Also Published As

Publication number Publication date
ITPN960065A1 (it) 1998-05-26
EP0844447A3 (fr) 2000-04-12
IT1289400B1 (it) 1998-10-02

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