EP1714101B1 - Refrigerated cabinet with partially structured heat exchanger laminae - Google Patents

Refrigerated cabinet with partially structured heat exchanger laminae Download PDF

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Publication number
EP1714101B1
EP1714101B1 EP05707177A EP05707177A EP1714101B1 EP 1714101 B1 EP1714101 B1 EP 1714101B1 EP 05707177 A EP05707177 A EP 05707177A EP 05707177 A EP05707177 A EP 05707177A EP 1714101 B1 EP1714101 B1 EP 1714101B1
Authority
EP
European Patent Office
Prior art keywords
heat exchanger
smooth
fins
laminae
slats
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.)
Not-in-force
Application number
EP05707177A
Other languages
German (de)
French (fr)
Other versions
EP1714101A1 (en
Inventor
Tino BRÄUMER
Thomas Krieger
Uwe Neumann
Andreas Rehklau
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.)
Carrier Kaeltetechnik Deutschland GmbH
Original Assignee
Linde Kaeltetechnik GmbH
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 Linde Kaeltetechnik GmbH filed Critical Linde Kaeltetechnik GmbH
Publication of EP1714101A1 publication Critical patent/EP1714101A1/en
Application granted granted Critical
Publication of EP1714101B1 publication Critical patent/EP1714101B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F28F1/10—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
    • F28F1/24—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 transversely
    • F28F1/32—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 transversely the means having portions engaging further tubular elements
    • 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
    • F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
    • F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
    • F28D1/04—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits
    • F28D1/047—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being bent, e.g. in a serpentine or zig-zag
    • F28D1/0477—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being bent, e.g. in a serpentine or zig-zag the conduits being bent in a serpentine or zig-zag
    • 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
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
    • F28D2021/0019—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for
    • F28D2021/0068—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for refrigerant cycles
    • F28D2021/0071—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
    • F28F2215/00—Fins
    • F28F2215/04—Assemblies of fins having different features, e.g. with different fin densities

Definitions

  • the invention relates to a refrigerator with at least one heat exchanger, comprising a plurality of substantially mutually parallel slats (known from US 2003/0196784 ).
  • heat exchanger below all types of heat exchangers, but especially evaporators and coolers for refrigeration cabinets and (ceiling) air cooler, as they are, for example, used in cold storage to understand.
  • refrigerated cabinets below all types of goods display furniture, which have at least one refrigerated goods space to understand. It is irrelevant whether the one or more cooled goods rooms for the so-called normal cooling or so-called deep freezing are formed.
  • a disadvantage of the above-described first possible solution is that in the case of comparatively large distances between the slats, the power density of the heat exchanger is comparatively low. Will the distances between the Slats significantly reduced, so the heat exchanger has a reduced service life, since the lamellae or the interstices formed by them freeze or intercept relatively quickly.
  • the above-described second solution requires a comparatively high production cost and also offers only a small degree of variation in terms of fin spacing. Also, the above-described third possible solution has a very high production cost.
  • Object of the present invention is to provide a refrigerated cabinet with a generic heat exchanger, which has a comparatively high power density at a reduced manufacturing cost, without causing a reduction in the service life of the heat exchanger.
  • non-smooth is to be understood as any shape for the non-smooth areas of the slats.
  • the non-smooth areas of the slats are formed wavy.
  • the non-smooth areas of the slats are provided in the inlet region of the heat exchanger.
  • outlet region is to be understood that region or that side of the heat exchanger via which the medium to be cooled or heated by means of the heat exchanger enters the regions between the lamellae.
  • the figure shows a possible embodiment of the heat exchanger 1, as it finds, for example, as an evaporator in refrigeration appliance application.
  • Such heat exchangers 1 are formed from a plurality of equally spaced slats 2.
  • these slats 2 are now partly not smooth, preferably - as shown in the figure - wavy (area 2a) and partially smooth (area 2b) formed.
  • inlet lines 3 for the or the heat exchanger 1 supplied refrigerant or carrier, and the corresponding outlet line. 4
  • the medium to be heated or cooled by means of the heat exchanger - in the case of using the heat exchanger in a refrigerated cabinet circulating the air in the cabinet this medium represents - enters the evaporator inlet side - represented by the arrow E - in the heat exchanger 1 and the slat gaps and exits the heat exchanger 1 and the spaces on the exit side - represented by the arrow A.
  • the heat exchanger 1 - compared to a heat exchanger design in which the fins are flat - now on a higher power density. This results from the fact that due to the non-smooth formation of the slats 2a increases the effective surface of the fins and the degree of turbulence of the flow of the guided through the heat exchanger 1 medium is increased.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Geometry (AREA)
  • Devices That Are Associated With Refrigeration Equipment (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Abstract

A heat exchanger for a refrigerator unit has a plurality of fins arranged essentially parallel to one another. At least some of the fins are not smooth in part and smooth in part.

Description

Die Erfindung betrifft ein Kühlmöbel mit wenigstens einem Wärmetauscher, aufweisend mehrere, im Wesentlichen parallel zueinander angeordnete Lamellen (bekannt aus US 2003/0196784 ). Unter dem Begriff "Wärmetauscher" seien nachfolgend alle Arten von Wärmetauscher, insbesondere jedoch Verdampfer und Kühler für Kühlmöbel und (Decken)Luftkühler, wie sie bspw. in Kühlräumen zum Einsatz kommen, zu verstehen.The invention relates to a refrigerator with at least one heat exchanger, comprising a plurality of substantially mutually parallel slats (known from US 2003/0196784 ). The term "heat exchanger" below all types of heat exchangers, but especially evaporators and coolers for refrigeration cabinets and (ceiling) air cooler, as they are, for example, used in cold storage to understand.

Unter dem Begriff "Kühlmöbel" seien nachfolgend alle Arten von Warenpräsentationsmöbeln, die wenigsten einen gekühlten Warenraum aufweisen, zu verstehen. Hierbei ist es unerheblich, ob der oder die gekühlten Warenräume für die so genannte Normalkühlung oder die sogenannte Tiefkühlung ausgebildet sind.The term "refrigerated cabinets" below all types of goods display furniture, which have at least one refrigerated goods space to understand. It is irrelevant whether the one or more cooled goods rooms for the so-called normal cooling or so-called deep freezing are formed.

Bei gattungsgemäßen Wärmetauschern werden bisher drei unterschiedliche Lösungen bezüglich der Anordnung der Lamellen realisiert. Bei der ersten Lösung weisen alle Lamellen die gleichen Abmessungen auf und sind in regelmäßigen Abständen zueinander angeordnet. Bei der zweiten Lösungsmöglichkeit sind zwar die Abstände zwischen den einzelnen Lamellen identisch, jedoch weisen die Lamellen unterschiedliche Abmessungen - im Regelfall zwei unterschiedliche Abmessungen - auf. Bei der dritten Lösung werden zwei oder mehr hinsichtlich ihrer Abmessungen und Abstände zueinander unterschiedliche Lamellenpakete zu einem Wärmetauscher gekoppelt.In generic heat exchangers so far three different solutions with respect to the arrangement of the slats are realized. In the first solution, all lamellae have the same dimensions and are arranged at regular intervals from one another. In the second possible solution, although the distances between the individual slats are identical, but the slats have different dimensions - usually two different dimensions - on. In the third solution, two or more disc packs different in their dimensions and distances from each other are coupled to a heat exchanger.

Den vorgenannten Lösungen ist jedoch gemein, dass die verwendeten Lamellen entweder vollständig gewellt oder vollständig glatt bzw. plan ausgebildet sind.The abovementioned solutions, however, have in common that the lamellae used are either completely corrugated or completely smooth or planar.

Von Nachteil bei der vorbeschriebenen ersten Lösungsmöglichkeit ist, dass im Falle vergleichsweise großer Abstände zwischen den Lamellen die Leistungsdichte des Wärmetauschers vergleichsweise gering ist. Werden die Abstände zwischen den Lamellen deutlich verringert, so weist der Wärmetauscher eine verringerte Standzeit auf, da die Lamellen bzw. die durch sie gebildeten Zwischenräume relativ schnell vereisen bzw. verreifen. Die vorbeschriebene zweite Lösungsmöglichkeit erfordert einen vergleichsweise hohen Fertigungsaufwand und bietet darüber hinaus nur einen geringen Variationsgrad hinsichtlich des Lamellenabstandes. Auch die vorbeschriebene dritte Lösungsmöglichkeit weist einen sehr hohen Fertigungsaufwand auf.A disadvantage of the above-described first possible solution is that in the case of comparatively large distances between the slats, the power density of the heat exchanger is comparatively low. Will the distances between the Slats significantly reduced, so the heat exchanger has a reduced service life, since the lamellae or the interstices formed by them freeze or intercept relatively quickly. The above-described second solution requires a comparatively high production cost and also offers only a small degree of variation in terms of fin spacing. Also, the above-described third possible solution has a very high production cost.

Aufgabe der vorliegenden Erfindung ist es, ein Kühlmöbel mit einem gattungsgemäßen Wärmetauscher anzugeben, der bei einem verringerten Fertigungsaufwand eine vergleichsweise hohe Leistungsdichte aufweist, ohne dass es hierbei zu einer Verringerung der Standzeit des Wärmetauschers kommt.Object of the present invention is to provide a refrigerated cabinet with a generic heat exchanger, which has a comparatively high power density at a reduced manufacturing cost, without causing a reduction in the service life of the heat exchanger.

Zur Lösung dieser Aufgabe wird ein Kühlmöbel gemäß Anspruch 1 vorgeschlagen.To solve this problem, a refrigerated cabinet according to claim 1 is proposed.

Unter dem Begriff "nicht glatt" sei nachfolgend jede beliebige Formgebung für die nicht glatten Bereiche der Lamellen zu verstehen.The term "non-smooth" below is to be understood as any shape for the non-smooth areas of the slats.

Vorzugsweise sind hierbei die nicht glatten Bereiche der Lamellen gewellt ausgebildet.Preferably, in this case, the non-smooth areas of the slats are formed wavy.

Die nicht glatten Bereiche der Lamellen sind im Eintrittsbereich des Wärmetauschers vorgesehen.The non-smooth areas of the slats are provided in the inlet region of the heat exchanger.

Unter dem Begriff "Eintrittsbereich" sei derjenige Bereich bzw. diejenige Seite des Wärmetauschers zu verstehen, über den bzw. über die das mittels des Wärmetauschers abzukühlende oder anzuwärmende Medium in die Bereiche zwischen den Lamellen eintritt.The term "inlet region" is to be understood that region or that side of the heat exchanger via which the medium to be cooled or heated by means of the heat exchanger enters the regions between the lamellae.

Das erfindungsgemäße Kühlmöbel sowie eine weitere Ausgestaltung desselben, die Gegenstand des abhängigen Patentanspruchs darstellt, seien im Folgenden anhand des in der Figur dargestellten Ausführungsbeispieles näher erläutert.The refrigerator according to the invention and a further embodiment thereof, which is the subject of the dependent claim, are explained in more detail below with reference to the embodiment shown in the figure.

Die Figur zeigt eine mögliche Ausführungsform des Wärmetauschers 1, wie er bspw. als Verdampfer in Kühlmöbel Anwendung findet. Derartige Wärmetauscher 1 sind aus einer Vielzahl von in gleichem Abstand angeordneten Lamellen 2 gebildet. Erfindungsgemäß sind diese Lamellen 2 nunmehr teilweise nicht glatt, vorzugsweise - wie in der Figur dargestellt - gewellt (Bereich 2a) und teilweise glatt (Bereich 2b) ausgebildet.The figure shows a possible embodiment of the heat exchanger 1, as it finds, for example, as an evaporator in refrigeration appliance application. Such heat exchangers 1 are formed from a plurality of equally spaced slats 2. According to the invention, these slats 2 are now partly not smooth, preferably - as shown in the figure - wavy (area 2a) and partially smooth (area 2b) formed.

In der Figur ferner dargestellt sind die Eintrittsleitungen 3, für das bzw. den den Wärmetauscher 1 zugeführten Kältemittel bzw. -träger, sowie die entsprechende Austrittsleitung 4.Also shown in the figure are the inlet lines 3, for the or the heat exchanger 1 supplied refrigerant or carrier, and the corresponding outlet line. 4

Das mittels des Wärmetauschers zu erwärmende oder zu kühlende Medium - im Falle der Verwendung des Wärmetauschers in einem Kühlmöbel stellt die in dem Kühlmöbel zirkulierende Luft dieses Medium dar - tritt über die Verdampfereingangsseite - dargestellt durch den Pfeil E - in den Wärmetauscher 1 bzw. die Lamellenzwischenräume ein und verlässt den Wärmetauscher 1 bzw. die Zwischenräume auf der Austrittsseite - dargestellt durch den Pfeil A.The medium to be heated or cooled by means of the heat exchanger - in the case of using the heat exchanger in a refrigerated cabinet circulating the air in the cabinet this medium represents - enters the evaporator inlet side - represented by the arrow E - in the heat exchanger 1 and the slat gaps and exits the heat exchanger 1 and the spaces on the exit side - represented by the arrow A.

Eingangsseitig weist der Wärmetauscher 1 - im Vergleich zu einer Wärmetauscherkonstruktion, bei der die Lamellen plan ausgebildet sind - nunmehr eine höhere Leistungsdichte auf. Dies resultiert aus der Tatsache, dass aufgrund der nicht glatten Ausbildung der Lamellen 2a die effektive Oberfläche der Lamellen vergrößert und der Turbulenzgrad der Strömung des durch den Wärmetauscher 1 geführten Mediums erhöht wird.On the input side, the heat exchanger 1 - compared to a heat exchanger design in which the fins are flat - now on a higher power density. This results from the fact that due to the non-smooth formation of the slats 2a increases the effective surface of the fins and the degree of turbulence of the flow of the guided through the heat exchanger 1 medium is increased.

Die im Zusammenhang mit der vorbeschriebenen ersten Lösungsmöglichkeit angeführten Nachteile werden durch die Wärmetauscherkonstruktion vermieden, wobei der Fertigungsaufwand in der Größenordnung der vorbeschriebenen ersten Lösungsmöglichkeit liegt.The mentioned in connection with the above-described first possible solution disadvantages are caused by the Heat exchanger design avoided, the production cost is on the order of the above first possible solution.

Es ist vorzugsweise darauf zu achten, dass erst in dem Bereich, in dem die Lamellen 2 plan bzw. glatt ausgebildet sind (Bereich 2b), die ggf. nicht zu vermeidende Taupunktunterschreitung und damit Kondensatbildung des abzukühlenden Mediums erfolgt.It is preferably to ensure that only in the area in which the slats 2 are flat or smooth (area 2b), the possibly unavoidable dew point and thus condensate of the medium to be cooled takes place.

Claims (2)

  1. Refrigeration furniture comprising at least one refrigerated goods space and at least one heat exchanger having a plurality of fins arranged substantially parallel to one another, wherein air to be refrigerated enters via an evaporator entrance side in spaces between the fins and wherein at least some of the fins (2) are designed to be not smooth (2a) in part and smooth (2b) in part,
    characterized in that the not smooth regions of the fins (2a) are provided in the entry region (E) of the heat exchanger (1).
  2. Refrigeration furniture according to claim 1,
    characterized in that the not smooth regions of the fins (2a) are designed to be corrugated.
EP05707177A 2004-02-09 2005-02-03 Refrigerated cabinet with partially structured heat exchanger laminae Not-in-force EP1714101B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004006276A DE102004006276A1 (en) 2004-02-09 2004-02-09 Partially structured heat exchanger fins
PCT/EP2005/001095 WO2005075918A1 (en) 2004-02-09 2005-02-03 Partially structured heat exchanger laminae

Publications (2)

Publication Number Publication Date
EP1714101A1 EP1714101A1 (en) 2006-10-25
EP1714101B1 true EP1714101B1 (en) 2010-06-02

Family

ID=34801784

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05707177A Not-in-force EP1714101B1 (en) 2004-02-09 2005-02-03 Refrigerated cabinet with partially structured heat exchanger laminae

Country Status (6)

Country Link
US (1) US20070131395A1 (en)
EP (1) EP1714101B1 (en)
AT (1) ATE470122T1 (en)
DE (2) DE102004006276A1 (en)
ES (1) ES2346984T3 (en)
WO (1) WO2005075918A1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101806550B (en) * 2010-03-24 2014-02-19 三花控股集团有限公司 Microchannel heat exchanger
AT515972B1 (en) * 2014-05-20 2016-04-15 Josef Dipl Ing Dr Techn Masswohl Modular air-brine heat exchanger
US20200333077A1 (en) * 2019-04-18 2020-10-22 The Babcock & Wilcox Company Perturbing air cooled condenser fin
DE102019208619A1 (en) * 2019-06-13 2020-12-17 Siemens Aktiengesellschaft Heat exchanger, method for producing a heat exchanger and power plant with such a heat exchanger

Family Cites Families (11)

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Publication number Priority date Publication date Assignee Title
GB448815A (en) * 1935-06-04 1936-06-16 Arthur Bernard Modine Radiator core for cooling liquids
US3611534A (en) * 1969-09-25 1971-10-12 Olin Corp Method of making expanded integral fin sheet metal tubing for use in heat exchangers
JPS57188995A (en) * 1981-05-19 1982-11-20 Matsushita Seiko Co Ltd Heat exchanger
FR2565339A1 (en) * 1984-05-29 1985-12-06 Buffet Jean Improvements to fin-type exchangers for cooling air-conditioning air
US4580623A (en) * 1984-10-02 1986-04-08 Inglis Limited Heat exchanger
US5111876A (en) * 1991-10-31 1992-05-12 Carrier Corporation Heat exchanger plate fin
JPH08152228A (en) * 1994-11-29 1996-06-11 Sanyo Electric Co Ltd Heat exchanger
US5927393A (en) * 1997-12-11 1999-07-27 Heatcraft Inc. Heat exchanger fin with enhanced corrugations
JP2000205779A (en) * 1999-01-06 2000-07-28 Mitsubishi Heavy Ind Ltd Heat exchanger, outdoor unit, and air conditioner
US6598295B1 (en) * 2002-03-07 2003-07-29 Brazeway, Inc. Plate-fin and tube heat exchanger with a dog-bone and serpentine tube insertion method
US6889759B2 (en) * 2003-06-25 2005-05-10 Evapco, Inc. Fin for heat exchanger coil assembly

Also Published As

Publication number Publication date
WO2005075918A1 (en) 2005-08-18
EP1714101A1 (en) 2006-10-25
DE502005009676D1 (en) 2010-07-15
ATE470122T1 (en) 2010-06-15
ES2346984T3 (en) 2010-10-22
DE102004006276A1 (en) 2005-08-25
US20070131395A1 (en) 2007-06-14

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