EP0874210A2 - Echangeur de chaleur modulaire, en particulier pour sèche-linge, machines à laver/sécher etc. - Google Patents

Echangeur de chaleur modulaire, en particulier pour sèche-linge, machines à laver/sécher etc. Download PDF

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Publication number
EP0874210A2
EP0874210A2 EP98105199A EP98105199A EP0874210A2 EP 0874210 A2 EP0874210 A2 EP 0874210A2 EP 98105199 A EP98105199 A EP 98105199A EP 98105199 A EP98105199 A EP 98105199A EP 0874210 A2 EP0874210 A2 EP 0874210A2
Authority
EP
European Patent Office
Prior art keywords
conduits
heat exchanger
condenser
conduit
cross
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Withdrawn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
EP98105199A
Other languages
German (de)
English (en)
Other versions
EP0874210A3 (fr
Inventor
Gunter Grittner
Stefano Dematte
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.)
Whirlpool Corp
Original Assignee
Whirlpool Corp
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 Whirlpool Corp filed Critical Whirlpool Corp
Publication of EP0874210A2 publication Critical patent/EP0874210A2/fr
Publication of EP0874210A3 publication Critical patent/EP0874210A3/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Withdrawn legal-status Critical Current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
    • F28F1/00—Tubular elements; Assemblies of tubular elements
    • F28F1/02—Tubular elements of cross-section which is non-circular
    • F28F1/04—Tubular elements of cross-section which is non-circular polygonal, e.g. rectangular
    • F28F1/045—Tubular elements of cross-section which is non-circular polygonal, e.g. rectangular with assemblies of stacked elements
    • 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
    • F28F9/0219—Arrangements for sealing end plates into casing or header box; Header box sub-elements
    • F28F9/0221—Header boxes or end plates formed by stacked elements
    • 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
    • F28F1/02—Tubular elements of cross-section which is non-circular
    • F28F2001/027—Tubular elements of cross-section which is non-circular with dimples

Definitions

  • This invention relates to a non-coaxial, modular heat exchanger usable as a condenser, particularly in clothes dryers, washing-drying machines and the like, in accordance with the introduction to the accompanying claim 1.
  • Heat exchangers and condensers are based on heat transfer between two physically separated fluid streams.
  • the heat transfer takes place between streams of atmospheric air (functioning as a cooling fluid) and streams, crosswise to the preceding, formed from heated moist air originating from clothes drying, and which has to lose its moisture, by cooling, before being returned into contact with the clothes to be dried.
  • Traditional heat exchangers or condensers consist of a series of substantially parallel channels traversed by one of the fluids and spaced apart from each other by spacers, such that between said channels there are formed sealed conduits to be traversed by the other of the fluids.
  • FIG. 1 One example of such a heat exchanger/condenser is shown in Figure 1 in which the reference numeral 1 indicates the rectangular channels of constant cross-section (generally metal tubes), 2 indicates the spacers and 3 indicates the conduits between said channels.
  • the arrows illustrate the cross flows of the two fluids. Because they use spacers and sealing materials or products to provide a seal, the known arrangements are complicated both in terms of the number of additional parts to be used and in terms of the process and the means used to provide the seal.
  • GB-A-2,033,569 describes a heat exchanger for clothes dryers which comprises a plurality of substantially rectangular tubes spaced apart from each other by metal section bars which are welded to the tubes. The ends of the section bars are welded to L-bent plates. Their construction involves considerable welding work and many parts, and is therefore complicated.
  • DE-A-19505641 describes a heat exchanger composed of a plurality of spaced-apart flat conduits. Undulated metal plates are provided in the spaces between the conduits and are fixed thereto.
  • EP-B1-0223995 describes a cross-flow heat exchanger in which a plurality of flat channels are maintained spaced apart by plastic endpieces provided both with parallel grooves receiving and supporting the ends of these flat channels, and with apertures for entry and respectively exit to and from the interspaces between said channels. This arrangement involves the use of separate endpieces for supporting the flat channels and for spacing them apart.
  • DE-C2-3242845 describes a cross-flow heat exchanger formed from layers of mutually offset tubes. The ends of the tubes of each layer are bent about and fixed into substantially tubular spacers, or welded to spacers. The construction is complicated and costly.
  • An object of the present invention is to provide a cross-flow heat exchanger or condenser of simple construction, which is free of additional spacer elements, and does not require special sealing means.
  • a further object of the invention is to provide a cross-flow heat exchanger or condenser, which by virtue of the particular design of its constituent elements enables high heat transfer between the processed fluids to be obtained.
  • the heat exchanger/condenser represented therein is formed from a plurality of superposed conduits 10 of variable cross-section, their end regions 10A bilaterally comprising parallel flat faces, followed by inclined regions 10B, and then an intermediate region 10C bilaterally comprising flat faces.
  • the conduit has a constant width "z" along the whole of its length, and a height "a" which in the end regions 10A is greater than the height "b" of the intermediate region 10C (and of the connection regions 10B).
  • the end regions act as a direct support for the conduits stacked one on another, and can be securely joined together for example by adhesives (or other bonding or sealing elements) applied on the mutually bearing faces of these ends.
  • the inclined regions 10B and the intermediate regions 10C of two superposed conduits 10 together form (or delimit) channels 12 for the flow of a fluid different from that which flows through the conduits 10.
  • conduits 10 alternate with "flat" conduits 11 arranged to adhere to the upper and lower faces (with respect to the drawings) of the ends 10A, to hence obtain channels 12A between the stacked conduits 10 and 11.
  • the various conduits can be joined together by conventional adhesives applied to those faces to be superposed (see Figure 5 in which the adhesive-carrying region is indicated by 13).
  • the conduits can be joined together by clinching, ie by folding the projecting edges 14 of one side of the ends 10A of one of the conduits about the adjacent edge of the end of the other conduit, possibly positioning within the fold a simple gasket for example of rubber 21 .
  • these conduits can be joined together in any other manner, for example by a male-female joint by providing suitably shaped projections at their ends.
  • the surfaces of the intermediate regions 10C and of the inclined regions 10B can be structured to improve heat transfer between the fluid streams, or to improve rigidity of the conduit.
  • the structure shown comprises depressions or concavities 20 in these surfaces, which can alternate with or be replaced by convexities 21.
  • the concavities 20 of opposed walls of the region 10C of a conduit 10 can be in mutual contact to further stiffen this region.
  • the dimension (height) "a" of the end regions 10A is again greater than the corresponding dimension "b" of the intermediate region 10C, but the other dimension (width) "Z 1 " of this latter is different (greater in the example) from the dimension "Z 2 " of the end regions 10A for supporting other conduits.
  • the inclined regions 10B are of frusto-pyramidal shape with a rectangular cross-section.
  • the conduits are preferably of metal (for example aluminium).
  • They can however also be of synthetic material filled with metal to increase the heat transfer coefficient.
  • Figures 8a, 8b and 8c show a further embodiment of the invention in which the mutually superposed conduits 100 and 200 are differently shaped in pairs.
  • a conduit 100 having convex-curved ends there is associated a conduit 200 having concave-curved ends 200A which mate with the convex ends 100A of the adjacent conduit 100.
  • the conduits 100 and 200 can have a completely concave or convex shape or comprise portions (for example 100A) concave or convex and other portions (for example 100B, 100C) convex or concave.
  • the shape of these conduits at their ends 100A and 200A is such as to enable them to be stacked and to form between them channels 120 which optimize heat transfer.
  • a plurality of these pairs of conduits 100 and 200 are hence superposed and preferably maintained coupled by a seal ring 300 of traditional type which acts both as a sealing element and as a securing element for the "pack" of conduits.
  • an end conduit 100 or 200 of this assembly could be replaced by an assembly closure piece shaped as the missing conduit.
  • This piece can be a closed piece, not defining a conduit.
  • the conduits can have concave parts (such as the end parts of the conduits 100A) alternating with other intermediate convex parts, and can have intermediate portions 100B, 100C, 200B, 200C with rounded or sharp edges.
  • the conduits can be rectilinear or curvilinear along their major axis.
  • the cross-section through these conduits can be rectangular (or polygonal) or curvilinear (for example elliptical). This cross-section can have a constant perimeter along the entire length of the conduits or can have different perimeters at different points of them.
  • conduits shown in the figures can be produced by one of the following known methods or by a combination thereof:

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Geometry (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Drying Of Solid Materials (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)
EP98105199A 1997-04-22 1998-03-23 Echangeur de chaleur modulaire, en particulier pour sèche-linge, machines à laver/sécher etc. Withdrawn EP0874210A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT97MI000942A IT1291636B1 (it) 1997-04-22 1997-04-22 Scambiatore di calore modulare particolarmente per macchine asciugabiancheria lavaasciugabiancheria e simili
ITMI970942 1997-04-22

Publications (2)

Publication Number Publication Date
EP0874210A2 true EP0874210A2 (fr) 1998-10-28
EP0874210A3 EP0874210A3 (fr) 1999-11-24

Family

ID=11376996

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98105199A Withdrawn EP0874210A3 (fr) 1997-04-22 1998-03-23 Echangeur de chaleur modulaire, en particulier pour sèche-linge, machines à laver/sécher etc.

Country Status (2)

Country Link
EP (1) EP0874210A3 (fr)
IT (1) IT1291636B1 (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002014771A2 (fr) * 2000-08-16 2002-02-21 Max Roth Echangeur de chaleur
WO2003081159A1 (fr) * 2002-03-27 2003-10-02 Valeo Thermique Moteur Echangeur de chaleur, notamment pour un vehicule automobile, constitue d'elements tubulaires empiles
WO2011074963A3 (fr) * 2009-12-18 2011-11-17 Mircea Dinulescu Échangeur de chaleur de type plaque et procédé de fabrication de plaque d'échangeur de chaleur
CN103256715A (zh) * 2013-05-17 2013-08-21 宁波市哈雷换热设备有限公司 互通式翅片热交换与余热回收组合装置
WO2014048688A1 (fr) * 2012-09-25 2014-04-03 Behr Gmbh & Co. Kg Tube plat
DE102013222128A1 (de) * 2013-10-30 2015-04-30 MAHLE Behr GmbH & Co. KG Rohrwärmeübertrager
WO2016017788A1 (fr) * 2014-07-30 2016-02-04 株式会社ティラド Tube plat pour échangeur de chaleur sans plaque collectrice
WO2017102382A1 (fr) * 2015-12-17 2017-06-22 Mahle International Gmbh Échangeur de chaleur et élément adaptateur

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2033569A (en) 1978-05-03 1980-05-21 Knowles W G C Heat exchanger
DE3242845C2 (de) 1982-11-19 1986-03-20 MTU Motoren- und Turbinen-Union München GmbH, 8000 München Wärmetauscher für Gase stark unterschiedlicher Temperaturen
EP0223995A2 (fr) 1985-10-25 1987-06-03 Elpag Ag Chur Echangeur de chaleur
DE19505641A1 (de) 1995-02-18 1996-08-22 Miele & Cie Wärmetauscher

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1346577A (en) * 1919-03-03 1920-07-13 John E Whitbeck Radiator
FR623451A (fr) * 1926-02-17 1927-06-24 Moreux & Cie G Tubes pour radiateurs nids d'abeilles et nouveaux radiateurs en résultant
CH378353A (de) * 1960-09-01 1964-06-15 Urech Karl Wärmeaustauscher mit plattenförmigen Austauschelementen
US4206806A (en) * 1976-03-15 1980-06-10 Akira Togashi Heat-conducting oval pipes in heat exchangers
DE3622953A1 (de) * 1986-07-09 1988-01-21 Sueddeutsche Kuehler Behr Waermetauscher, insbesondere kaeltemittel-verdampfer
DE4237117A1 (de) * 1992-11-03 1994-05-05 Bosch Siemens Hausgeraete Verfahren zum Herstellen eines Pakets von Wärmetauscher-Platten für einen Haushalt-Wäschetrockner, Werkzeug für ein solches Herstellungsverfahren und nach diesem Verfahren hergestelltes Plattenpaket
CN1132552A (zh) * 1993-08-04 1996-10-02 因西尔科公司热部件部门 散热管及其制造方法和设备

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2033569A (en) 1978-05-03 1980-05-21 Knowles W G C Heat exchanger
DE3242845C2 (de) 1982-11-19 1986-03-20 MTU Motoren- und Turbinen-Union München GmbH, 8000 München Wärmetauscher für Gase stark unterschiedlicher Temperaturen
EP0223995A2 (fr) 1985-10-25 1987-06-03 Elpag Ag Chur Echangeur de chaleur
DE19505641A1 (de) 1995-02-18 1996-08-22 Miele & Cie Wärmetauscher

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002014771A3 (fr) * 2000-08-16 2002-08-29 Max Roth Echangeur de chaleur
WO2002014771A2 (fr) * 2000-08-16 2002-02-21 Max Roth Echangeur de chaleur
WO2003081159A1 (fr) * 2002-03-27 2003-10-02 Valeo Thermique Moteur Echangeur de chaleur, notamment pour un vehicule automobile, constitue d'elements tubulaires empiles
FR2837917A1 (fr) * 2002-03-27 2003-10-03 Valeo Thermique Moteur Sa Echangeur de chaleur, notamment pour un vehicule automobile, constitue d'elements tubulaires empiles
CN102792115B (zh) * 2009-12-18 2015-02-18 米尔恰·蒂努列斯库 板式热交换器和制造热交换器板的方法
WO2011074963A3 (fr) * 2009-12-18 2011-11-17 Mircea Dinulescu Échangeur de chaleur de type plaque et procédé de fabrication de plaque d'échangeur de chaleur
CN102792115A (zh) * 2009-12-18 2012-11-21 米尔恰·蒂努列斯库 板式热交换器和制造热交换器板的方法
US20120325445A1 (en) * 2009-12-18 2012-12-27 Mircea Dinulescu Plate type heat exchanger and method of manufacturing heat exchanger plate
US9222731B2 (en) 2009-12-18 2015-12-29 Mircea Dinulescu Plate type heat exchanger and method of manufacturing heat exchanger plate
WO2014048688A1 (fr) * 2012-09-25 2014-04-03 Behr Gmbh & Co. Kg Tube plat
US20150247680A1 (en) * 2012-09-25 2015-09-03 Mahle International Gmbh Flat pipe
US10520261B2 (en) 2012-09-25 2019-12-31 Mahle International Gmbh Flat pipe
CN103256715B (zh) * 2013-05-17 2015-07-08 宁波市哈雷换热设备有限公司 互通式翅片热交换与余热回收组合装置
CN103256715A (zh) * 2013-05-17 2013-08-21 宁波市哈雷换热设备有限公司 互通式翅片热交换与余热回收组合装置
DE102013222128A1 (de) * 2013-10-30 2015-04-30 MAHLE Behr GmbH & Co. KG Rohrwärmeübertrager
WO2016017788A1 (fr) * 2014-07-30 2016-02-04 株式会社ティラド Tube plat pour échangeur de chaleur sans plaque collectrice
US10260821B2 (en) 2014-07-30 2019-04-16 T.Rad Co., Ltd. Flat tube for header-plateless heat exchanger
WO2017102382A1 (fr) * 2015-12-17 2017-06-22 Mahle International Gmbh Échangeur de chaleur et élément adaptateur

Also Published As

Publication number Publication date
ITMI970942A1 (it) 1998-10-22
EP0874210A3 (fr) 1999-11-24
IT1291636B1 (it) 1999-01-19
ITMI970942A0 (fr) 1997-04-22

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