EP0787276B1 - Echangeur de chaleur - Google Patents

Echangeur de chaleur Download PDF

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Publication number
EP0787276B1
EP0787276B1 EP96922743A EP96922743A EP0787276B1 EP 0787276 B1 EP0787276 B1 EP 0787276B1 EP 96922743 A EP96922743 A EP 96922743A EP 96922743 A EP96922743 A EP 96922743A EP 0787276 B1 EP0787276 B1 EP 0787276B1
Authority
EP
European Patent Office
Prior art keywords
heat
heat exchanger
tube
ribs
helix
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
EP96922743A
Other languages
German (de)
English (en)
Other versions
EP0787276A1 (fr
Inventor
Roman Heckt
Bernd Thomas
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.)
Robert Bosch GmbH
Viessmann Werke GmbH and Co KG
Original Assignee
Robert Bosch GmbH
Viessmann Werke GmbH and Co KG
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
Priority claimed from DE19546489A external-priority patent/DE19546489A1/de
Application filed by Robert Bosch GmbH, Viessmann Werke GmbH and Co KG filed Critical Robert Bosch GmbH
Publication of EP0787276A1 publication Critical patent/EP0787276A1/fr
Application granted granted Critical
Publication of EP0787276B1 publication Critical patent/EP0787276B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D7/02—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being helically coiled
    • F28D7/022—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being helically coiled the conduits of two or more media in heat-exchange relationship being helically coiled, the coils having a cylindrical configuration
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2225/00—Synthetic polymers, e.g. plastics; Rubber
    • F05C2225/08—Thermoplastics

Definitions

  • the invention relates to a heat exchanger for after a regenerative gas cycle heat and cooling machines, with Separation of the media participating in the heat transfer, one with the heat transfer surface-enlarging tube provided as Flow channel for a heat-absorbing or heat-emitting preferably liquid medium is used.
  • the invention further relates to a Process for producing such a heat exchanger.
  • EP 411 404 A1 describes a heat exchanger with a finned surface Inner tube, which is covered by an impermeable covering Form of a shrink tube is surrounded.
  • the ribs are spiral attached to the inner tube and enclosed by the casing, so that between the ribs a spiral Flow channel for a heat transfer medium is created.
  • a heat exchanger designed to increase the heat transfer area has a coiled tube with fins, goes out FR 2 558 945 A 1.
  • the ribs are spiral, so that the medium for cooling or heating is also spiral flows between the casing and the spiral tube.
  • a heat exchanger is also known from US 4,349,950 A, at which has a helical tube with individual ribs. However, the ribs of two adjacent helixes do not form a rib channel out.
  • the invention is based, in particular for after a regenerative gas cycle process working heat and Chillers suitable heat exchanger with a low Construction volume and a very small hydraulic diameter for the heat-emitting or heat-absorbing working medium create, moreover, the high pressure differences between withstands the high and medium pressure medium and also for other uses should be suitable.
  • the heat exchanger In the heat exchanger, they are on the outer surface arranged ribs on their rib heads with an impermeable and provided a thermally insulating sheathing, between the casing and the outer surface of the tube at least a flow channel for the one involved in the heat exchange, preferably formed by a process gas second medium is.
  • the design according to the invention results in a heat exchanger, which are manufactured on the one hand with a small construction volume can and on the other hand a very low working medium side Dead volume, because the rib channels with a minimal Width of about 0.35 mm and a minimum height of about 0.9 mm can be trained.
  • Such small hydraulic diameters can be used especially if it is the Working medium is a process gas.
  • the envelope forming the flow channel for the working medium surrounds the entire single or multi-turn helix. Due to the helical Winding up the tube becomes a particularly compact one Design achieved with a high degree of efficiency.
  • a further embodiment according to the invention is that of the coiled tube existing spiral formed multi-row.
  • Another way to increase the efficiency of a Heat exchanger according to the invention is that in one Multi-turn spiral heat exchanger formed by the tube Flow channel for the heat-absorbing or heat-emitting medium is divided into several individual channels with separate inlet and outlet.
  • a heat-absorbing medium is initiated by introducing a new heat-absorbing medium and dissipation of the already heated Medium significantly improve heat transfer without increasing of the working volume side dead volume and without any significant change of the overall volume of the heat exchanger.
  • the ribs at the contact points of two up and / or intermeshing helical gears mesh according to one preferred embodiment of the invention, the ribs at least one Helical path at these contact points at about half their radial Extent bent at right angles.
  • a compact design with thin walls, that of the tall ones Pressure difference between heat-emitting and heat-absorbing Medium withstands, can according to a further embodiment of the invention can be achieved in that the tube is cylindrical.
  • the covering for sealing the rib channel and for forming the Working medium side flow channel exists in one embodiment the invention from a film, preferably an inflation or shrink film.
  • the casing consists of a hardening, pourable material, such as plastic or resin.
  • the viscosity of the materials to be cast is to be chosen so that it one hand is low enough to freeze the entire one before solidifying Enclose heat exchangers thoroughly, and on the other hand is high enough so that this material does not penetrate into the rib channel and thus the Closes flow channel for the working medium.
  • the envelope can be produced in that the Gaps between the fins of the finned tube before casting around the hardening material with wax to prevent penetration of the Prevent casting material into the gaps. Following the The wax is cast from the casting process Expelled flow channels.
  • the tube and the fins consist of one Material with a high coefficient of thermal conductivity.
  • Heat exchanger is used in one after a regenerative Gas cycle process working heat and chiller determined in which the media participating in the heat transfer are separated from one another.
  • the heat exchanger comprises a tube 1, which is on its outer surface 1a is provided with ribs 2 to enlarge the heat transfer area.
  • the tube 1 is for Formation of the heat exchanger coiled to form a spiral 3.
  • the Cylindrical tube 1 of the heat exchanger serves as Flow channel for the heat-absorbing or heat-emitting preferably liquid medium, which via inlet and outlet 4 in the Tube 1 is introduced or led out of this.
  • the helix 3 As can be seen in FIG. 2, is surrounded by a sheath 5, which seals a rib channel 6 so that this along the outer Shell surface 1a of the tube 1 extending a flow channel for the forms heat-emitting or heat-absorbing medium.
  • the envelope 5 consists of a hardening material, which was cast around the helix 3 and Rib heads 2a abut.
  • the viscosity of this is preferably made of plastic or resin made of pourable material must be selected so that on the one hand the entire coil 3 before the material hardens is evenly surrounded by the covering 5, but on the other hand the viscosity is high enough so that the covering 5 does not penetrate into the rib channel 6, which would clog the flow channel.
  • the flow does not take place along the entire rib channel 6 and thus along the entire Shell surface of the helically coiled tube 1.
  • the one ring-shaped inlet 7a and outlet 7b flowing in and out Medium flows in the shortest way from the inlet, as can be seen in FIG. 2 7a to sequence 7b, namely perpendicularly in the drawing plane shown along the superimposed tubes 1, the process medium being a flows around each pipe section along about half its circumference.
  • the heat exchanger can also have multiple rows, be formed, for example, by coaxially arranging a plurality of helices 3.
  • a heat exchanger designed as set out above stands out characterized in that on the one hand it has a compact construction volume and on the other hand, the working volume-side dead volume is very low, since the Rib channels 6 with a minimum width of about 0.35 mm and one minimum height of about 0.9 mm can be manufactured. Furthermore is the cost of manufacturing such a heat exchanger low, since the main component of the heat exchanger, namely that with a Rib 2 provided tube 1 as a standard component of many heat exchangers no Represents special component. Also surrounding the helix 3 with the covering 5, for example by casting with a plastic or resin inexpensive to accomplish, because as an additional component only an inner and an external shape (not shown) that the material is up to fix to its solidification. The manufacture of such a heat exchanger is therefore technically well manageable and in series production possible at low cost.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Claims (8)

  1. Echangeur de chaleur pour une machine thermique et frigorifique fonctionnant selon un cycle de gaz à régénération, avec séparation des fluides participant à l'échange thermique, dans lequel
    un tube (1) muni d'ailettes (2) pour augmenter la surface d'échange de chaleur sert de canal de circulation pour le fluide caloporteur, de préférence liquide, qui fournit ou reçoit la chaleur,
    les ailettes (2), prévues sur la surface enveloppe extérieure (1a) du tube (1), sont munies au niveau de leur tête d'ailettes (2a) d'une enveloppe (5) imperméable et thermiquement isolante,
    entre l'enveloppe (5) et la surface (1a) du tube, on forme au moins un canal de circulation (6) pour le second fluide participant à l'échange thermique, de préférence un gaz de procédé, et
    le tube (1) muni d'ailettes est enroulé en hélice à un ou plusieurs passages pour former un enroulement (3) et l'enveloppe (5) entoure l'ensemble de l'enroulement (3) à un ou plusieurs passages,
    caractérisé en ce que
    les ailettes (2) d'une spire et les ailettes (2) de la spire voisine sont juxtaposées au voisinage des points de contact (8), de façon que le second fluide passe dans les canaux de circulation (6), dans la direction axiale par rapport à l'enroulement (3).
  2. Echangeur de chaleur selon la revendication 1,
    caractérisé en ce que
    l'enroulement (3), formé d'un tube enroulé (1), est à plusieurs rangées.
  3. Echangeur de chaleur selon l'une quelconque des revendications 1 ou 2,
    caractérisé en ce que
    le tube (1), qui forme le canal de circulation du fluide recevant la chaleur, est muni de plusieurs ajutages d'entrée et de sortie (4) distincts, dans la direction axiale.
  4. Echangeur de chaleur selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    les ailettes (2) d'au moins une spire, sont repliées au niveau des points de contact (8) de deux spires successives et/ou voisines, sensiblement à la hauteur de leur demi-extension radiale, en étant repliées à l'équerre.
  5. Echangeur de chaleur selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    le tube est cylindrique.
  6. Echangeur de chaleur selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    l'enveloppe (5) est formée d'une feuille, de préférence d'une feuille gonflable ou rétractable.
  7. Echangeur de chaleur selon l'une quelconque des revendications 1 à 5,
    caractérisé en ce que
    l'enveloppe (5) est en une matière susceptible d'être coulée et de durcir, de préférence une matière plastique ou une résine.
  8. Echangeur de chaleur selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    le tube (1) et les ailettes (2) sont en une matière à coefficient de conductivité thermique élevé.
EP96922743A 1995-07-12 1996-07-05 Echangeur de chaleur Expired - Lifetime EP0787276B1 (fr)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE19525364 1995-07-12
DE19525364 1995-07-12
DE19546489 1995-12-13
DE19546489A DE19546489A1 (de) 1995-07-12 1995-12-13 Wärmeübertrager und Verfahren zur Herstellung eines Wärmeübertragers
PCT/DE1996/001205 WO1997003332A1 (fr) 1995-07-12 1996-07-05 Echangeur de chaleur et procede de fabrication d'un echangeur de chaleur

Publications (2)

Publication Number Publication Date
EP0787276A1 EP0787276A1 (fr) 1997-08-06
EP0787276B1 true EP0787276B1 (fr) 2001-11-21

Family

ID=26016739

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96922743A Expired - Lifetime EP0787276B1 (fr) 1995-07-12 1996-07-05 Echangeur de chaleur

Country Status (5)

Country Link
EP (1) EP0787276B1 (fr)
JP (1) JPH10506179A (fr)
AT (1) ATE209329T1 (fr)
ES (1) ES2168492T3 (fr)
WO (1) WO1997003332A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10021898C2 (de) 2000-05-05 2003-03-13 Okin Ges Fuer Antriebstechnik Vorrichtung zum Verstellen von relativ zueinander beweglichen Teilen

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1166941A (en) * 1966-01-07 1969-10-15 Hymatic Eng Co Ltd Improvements relating to Heat Exchangers
US3643733A (en) * 1970-02-05 1972-02-22 Roger W Hall Heat exchanger
US4349950A (en) * 1979-07-05 1982-09-21 Solar Unlimited, Inc. Heat exchanger and method of making
DE3403429A1 (de) * 1984-02-01 1985-08-08 Karl 7298 Loßburg Hehl Kuehlereinheit fuer kunststoff-spritzgiessmaschine
DE3925704A1 (de) * 1989-08-03 1991-02-21 Wieland Werke Ag Waermeaustauscher
DE4202791A1 (de) * 1991-05-11 1992-11-12 Linder Rudolf Fa Waermetauscher fuer abwasser fuehrende rohr- oder schlauchleitungen

Also Published As

Publication number Publication date
ATE209329T1 (de) 2001-12-15
JPH10506179A (ja) 1998-06-16
EP0787276A1 (fr) 1997-08-06
ES2168492T3 (es) 2002-06-16
WO1997003332A1 (fr) 1997-01-30

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