EP2759795B1 - Échangeur de chaleur - Google Patents

Échangeur de chaleur Download PDF

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Publication number
EP2759795B1
EP2759795B1 EP14151999.1A EP14151999A EP2759795B1 EP 2759795 B1 EP2759795 B1 EP 2759795B1 EP 14151999 A EP14151999 A EP 14151999A EP 2759795 B1 EP2759795 B1 EP 2759795B1
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EP
European Patent Office
Prior art keywords
flow
heat exchanger
exchanger unit
section
flow guiding
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.)
Active
Application number
EP14151999.1A
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German (de)
English (en)
Other versions
EP2759795A3 (fr
EP2759795A2 (fr
Inventor
Steven Duncan
Ceslovas Georg Kizlauskas
Siegfried-Sebastian Ortmeier
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.)
Kelvion Refrigeration GmbH
Original Assignee
Kelvion Refrigeration 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 Kelvion Refrigeration GmbH filed Critical Kelvion Refrigeration GmbH
Publication of EP2759795A2 publication Critical patent/EP2759795A2/fr
Publication of EP2759795A3 publication Critical patent/EP2759795A3/fr
Application granted granted Critical
Publication of EP2759795B1 publication Critical patent/EP2759795B1/fr
Active 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
    • F28F13/00—Arrangements for modifying heat-transfer, e.g. increasing, decreasing
    • F28F13/06—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by affecting the pattern of flow of the heat-exchange media
    • 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
    • F28F17/00—Removing ice or water from heat-exchange apparatus
    • F28F17/005—Means for draining condensates from heat exchangers, e.g. from 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

Definitions

  • the present invention relates to a heat exchanger device for exchanging heat between air and a heat transfer medium.
  • Such heat exchanger devices are used, for example, in cooling systems, for example in order to evaporate a liquid heat transfer medium while removing heat from the ambient air.
  • US 2010/0180619 A1 discloses a heat exchanger device according to the preamble of claim 1.
  • a freezer is known whose freezer compartment is divided by a horizontal partition plate to create a natural convention.
  • DE 26 38 408 A1 discloses a device for cooling or heating a room which comprises a condenser unit, two fans and a plurality of automatically controlled blinds.
  • the J H04 191121 A discloses a radiator for a motor vehicle.
  • the US 6,328,099 B2 relates to a drying device for a stream of solid particles.
  • the above-mentioned object is achieved by a heat exchanger device having the features of claim 1.
  • the heat exchanger device comprises an exchanger unit through which the air can flow and through which the heat transfer medium can flow.
  • at least one flow guide device is provided which influences the flow of the inflowing air and supports the flow of edge regions of a cross section of the exchanger unit against which the flow is flowing.
  • the present invention is thus based on the knowledge that the efficiency of a heat exchanger device can be improved if the flow in the edge areas of the exchanger unit is improved in order to create more uniform conditions in the different areas of the exchanger unit.
  • a corresponding flow guide device is provided, which deflects and guides the inflowing air masses in a suitable manner.
  • Such a flow guide device can be, for example, a passive and / or statically arranged assembly (or a corresponding individual component) that can be manufactured inexpensively and, if necessary, installed later.
  • the flow guide device can also be integrated into existing components.
  • the flow guide device is arranged upstream in the flow direction of the incoming air and laterally outside the cross section of the exchanger unit against which the flow is flowing, the cross section of the exchanger unit against the flow being not covered by the flow guide device.
  • the flow guiding device is not arranged directly in front of the exchanger unit, as a result of which at least partial areas of the exchanger unit would be covered. This would in turn have a disadvantageous effect on the efficiency of the heat exchanger device.
  • air flowing obliquely to the exchanger unit for example, is advantageously deflected in order to obtain the desired flow profile.
  • air which would flow past a heat exchanger device of conventional design can be conducted to the exchanger unit.
  • the flow guide device can also contribute to avoiding the formation of turbulence in the vicinity of the face of the exchanger unit against which the flow is flowing.
  • the flow guiding device is arranged upstream in the flow direction of the inflowing air and laterally outside the cross section of the exchanger unit against which the flow is flowing.
  • the flow guiding device is not arranged directly in front of the exchanger unit, as a result of which at least partial areas of the exchanger unit would be covered. This would in turn have a disadvantageous effect on the efficiency of the heat exchanger device.
  • air flowing obliquely to the exchanger unit for example, is advantageously deflected in order to obtain the desired flow profile.
  • air which would flow past a heat exchanger device of conventional design can be conducted to the exchanger unit.
  • the flow guide device can also contribute to avoiding the formation of turbulence in the vicinity of the face of the exchanger unit against which the flow is flowing.
  • the flow guide device can comprise at least one guide section which is inclined and / or curved relative to a main flow direction of the air flowing to or through the exchanger unit.
  • a plurality of guide sections can be provided, each of which is inclined differently in order to generate the desired flow profile.
  • the guide sections can also be arranged one behind the other in the direction of flow of the inflowing air. Additionally or alternatively, it can be provided that the flow guide device comprises one or more curved guide sections.
  • the design of the guide section (s) can be adapted as desired to the respective prevailing conditions.
  • sections of the flow guide device can be configured differently depending on their position relative to the exchanger unit.
  • sections of the flow guide device provided on the sides of the exchanger unit in the position of use of the heat exchanger device are configured differently than sections that are arranged on an upper and / or a lower side of the exchanger unit.
  • the installation-specific conditions and / or functional components, which are only provided on certain sides or in certain areas of the heat exchanger device can be taken into account.
  • the flow guiding device comprises at least two sections which are formed separately from one another and which are arranged one behind the other in the flow direction of the inflowing air.
  • the flow guiding device is formed at least in sections on a housing which at least partially surrounds the exchanger unit.
  • the flow guiding device is at least in sections on a drip pan, which is provided in the installed position of the heat exchanger device to collect condensate formed on the exchanger unit, and / or on an optional intermediate plate (24) provided between the exchanger unit and the drip tray to collect the condensate, which is provided to collect ice falling from the exchanger unit, educated.
  • condensate is to be understood in particular as water in liquid or solid form, which can form during operation of the heat exchanger device and which is generally deposited on the exchanger unit.
  • the intermediate plate is used to catch ice, which falls, for example, in the course of defrosting the exchanger unit, and / or dripping water.
  • the intermediate plate is usually arranged between the exchanger unit and a drip pan, which is provided below the heat exchanger device, in order to be able to reliably collect and discharge the condensate.
  • a first section of the flow guiding device can be provided on the drip pan and a second section of the flow guiding device can be provided on the intermediate plate.
  • the drip pan and / or the intermediate plate can be provided with a heating device in order to ensure that condensation water dripping down from the exchanger unit does not freeze onto the intermediate plate. In addition, falling ice is melted and safely removed.
  • the flow guide device is at least partially formed in one piece with the housing, the drip pan and / or the intermediate plate.
  • the flow guide device comprises at least one separately manufactured component - for example a sheet metal or plastic component - which is fastened to the housing, the drip pan and / or the intermediate plate. So it is possible to use conventional heat exchanger devices by attaching them accordingly Retrofitting components to improve the flow to the exchanger unit.
  • the flow guiding device can form, at least in sections, a channel for collecting condensate formed on the exchanger unit, or it can be integrated into the channel.
  • the flow guide device can be shaped in such a way that, in addition to the flow line, it also contributes to a further functionality.
  • the channel can have a V-shaped or U-shaped cross section. For example, its cross section is modeled on a U that is inclined in the installed position of the heat exchanger device.
  • Fig. 1 shows a heat exchanger device 10a, which is, for example, a component of a refrigeration system.
  • the heat exchanger device 10a comprises a fan (not shown) and an exchanger unit 12, in which the exchange of heat between the ambient air and a heat transfer medium, for example a refrigerant, takes place.
  • the exchanger unit 12 comprises one or more pipelines that run through the volume of the exchanger unit 12 in order to extract heat from the ambient air and to supply it to the heat transfer medium.
  • fins can be provided which are in heat-conducting contact with the pipes to increase the effective surface of the exchanger unit 12 available for heat exchange.
  • the fan provides for a flow to the exchanger unit 12, which is symbolized by an arrow S 1 indicating the main flow direction.
  • the flow against the exchanger unit 12 causes it to flow through, which is symbolized by an arrow S 2 indicating the main flow direction.
  • the heat exchanger device 10a is suspended from a ceiling 14 of a building. It goes without saying that the following statements can also be applied analogously to other installation situations of the heat exchanger device 10a.
  • the attachment to the ceiling 14 influences a flow against the exchanger unit 12 in an upper edge region R, which is indicated by a dashed line. It goes without saying that the delimitation of the edge region R is not a sharp line in practice.
  • the exchanger unit 12 is not fastened directly to the ceiling 14 but is spaced from the latter by a section 16 of a housing of the heat exchanger device 10a.
  • the housing section 16 supports the development of the Coanda effect, which generates a slight negative pressure directly behind the heat exchanger device 10a, as a result of which the air flow rests / hugs the ceiling 14.
  • a flow guide section 18 is provided on the left side of the housing section 16 - that is, on the upstream side with respect to the main flow direction S 1 - which deflects part of the air flowing towards the exchanger unit 12. the The flow-guiding effect of the flow-guiding section 18 is indicated by the flow path s.
  • the flow guide section 18 ensures that the edge region R of the exchanger unit 12 is also flowed through by sufficient air.
  • a flow guide section 18a is provided, which is located on the side of the heat exchanger device 10a-in Fig. 1 left - is arranged on a drip tray 20.
  • the drip tray 20 serves to collect and discharge condensation water that drips down from the exchanger unit 12.
  • the drip tray 20 also serves to catch ice that falls from the exchanger unit 12, for example when it is defrosted.
  • the flow guide section 18a is curved and is designed in such a way that it creates a flow path s of the air which flows onto the edge region R of the exchanger unit 12 adjacent to the drip tray 20.
  • a gap 22 is provided between the flow guide section 18a and the exchanger unit 12 so that ice falling from the face of the exchanger unit 12 against which the flow is flowing can fall into the drip tray 20 and does not slip off the flow guide section 18a and fall to the ground in an uncontrolled manner.
  • the drip pan 20 is provided with a drain (not shown) in order to discharge the condensate that has accumulated in the drip pan 20.
  • the flow guide sections 18, 18a thus ensure a uniform flow through the exchanger unit 12, whereby they are adapted to the respective boundary conditions and are therefore designed differently.
  • the flow guide section 18 ensures that air flowing along the ceiling 14 to the upper edge area R of the exchanger unit 12 is directed towards.
  • the flow guide section 18a does the same with respect to the lower region R of the exchanger unit 12. Due to the different flow conditions - for example, there is no air-impermeable limit in the form of the ceiling 14 - the shape of the lower flow guide section 18a is different from that of the upper flow guide section 18.
  • Fig. 2 shows the heat exchanger device 10a in a view from the front, ie viewed in the direction S 1. It can be seen that the flow guide sections 18, 18a do not cover the face of the exchanger unit 12 against which the flow is flowing. Rather, together with the flow guide sections 18b provided on both sides of the exchanger unit 12, they form a type of funnel which improves the flow in the edge region R and thus the uniform flow through the exchanger unit 12.
  • the flow guide sections 18, 18a, 18b can be designed in order to achieve a flow through the exchanger unit 12 that is adapted to the respective situation. In principle, it is also possible that only individual pages or even only certain sections of individual pages are provided with flow guide sections 18, 18a, 18b.
  • the flow guide sections 18, 18a, 18b can basically be of the same design, but in many cases it is advantageous if they have different designs. Instead of the in Fig. 1
  • the curved configuration of the flow guide sections 18, 18a to be recognized, these - as well as the flow guide sections 18b - can be flat surfaces which, relative to the main direction of flow S 1 are inclined. It is also conceivable that several inclined planes with different angles of inclination are combined in order to generate desired flow paths s for improved flow to and through the edge regions R of the exchanger unit 12.
  • Fig. 3 shows a heat exchanger device 10b, whereby here essentially only its design in the lower area is discussed. It goes without saying that flow-guiding elements - such as the flow-guiding section 18 of the heat exchanger device 10a ( Fig. 1 ) - can be provided if necessary.
  • the heat exchanger device 10b has an intermediate plate 24 which is arranged between the exchanger unit 12 and the drip tray 20. Liquid condensate or falling ice that drips down from the exchanger unit 12 then first falls onto the intermediate plate 24, as a result of which the drip tray 20 is protected. Due to the inclination of the intermediate plate 24, the liquid or solid condensate passes into a V-shaped channel 26, where it can be collected and removed in a simple manner.
  • the flow guide section 18a attached to the drip tray 20 is provided with rounded edges 28 at its ends to reduce turbulence. The flow guide section 18a runs essentially flat between the edges 28.
  • Fig. 4 shows a heat exchanger device 10c which is functionally similar to the heat exchanger device 10b. However, it is not arranged hanging, but stands on a base, for example on the floor or the roof of a building.
  • the flow against the upper edge region R is improved by the flow guide section 18, which is formed on a cover plate 16 ', which in turn is a component of a housing of the heat exchanger device 10c.
  • the channel 26 is provided here with a semicircular cross section and the flow guide section 18a has a curved cross section between the rounded edges 28 in order to generate the desired geometry of the flow path s.
  • Fig. 5 shows a heat exchanger device 10d which has a separate housing section 16 which is provided with the flow guide section 18.
  • the exchanger unit 12 is suspended with the substructure attached to it, which includes the intermediate plate 24 and the drip tray 20, among other things.
  • the intermediate plate 24 of the heat exchanger device 10d is provided with a heating device 30 in order to be able to melt ice falling from the exchanger unit 12.
  • the water generated by melting the ice and the water dripping down from the exchanger unit 12 reach the channel 26, which has the cross-section of an inclined U.
  • the heating device 30 also extends into the region of the channel 26 in order to be able to quickly melt ice that has formed on the front side of the exchanger unit 12 and that falls during a defrosting process and that has entered the channel 26.
  • the left or upper leg of the U of the cross section of the channel 26 is a flat surface which is inclined with respect to the main direction of flow S 1. This component of the channel 26 thus simultaneously forms the The flow guide section 18a or the flow guide section 18a is shaped in such a way that it forms the channel 26.
  • a curved flow guide section 18c is provided on the drip tray 20, which, together with the flow guide section 18a, creates the desired geometry of the flow path s.
  • Fig. 6 shows a heat exchanger device 10e with a V-shaped channel 26 on the intermediate plate 24. Both the intermediate plate 24 and the drip tray 20 are provided at least in sections with a heating device 30 or 30a. The end of the channel 26 facing the inflowing air is provided with a flow guide section 18a which is inclined relative to the main flow direction S 1 and which, together with the likewise planar flow guide section 18c of the drip tray 20, creates the desired geometry of the flow path s.
  • the flow guide sections 18, 18a, 18b, 18c can in principle be designed in one piece with the components to which they are assigned. In principle, however, it is also possible to form these as separate components, in particular as sheet metal or plastic components.
  • Existing heat exchanger devices can be retrofitted with suitably designed flow guide sections by attaching appropriate components at the appropriate points. If the ambient conditions change, for example due to a changed installation position of the heat exchanger device, the flow guide sections can be exchanged and / or changed in order to take account of the changed conditions.

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

Claims (9)

  1. Dispositif échangeur de chaleur destiné à une installation frigorifique pour l'échange de chaleur entre de l'air et un fluide caloporteur, qui comprend une unité d'échange (12) susceptible d'être balayée par l'air affluant et d'être traversée par le fluide caloporteur, dispositif dans lequel est prévu au moins un moyen de guidage d'écoulement (18, 18a, 18b, 18c) qui influence l'écoulement (S1) de l'air affluant et qui soutient un écoulement balayant les zones de bord (R) d'une section transversale balayée de l'unité d'échange (12),
    dans lequel
    le moyen de guidage d'écoulement (18, 18a, 18b, 18c) est disposé en amont dans la direction d'écoulement (S1) de l'air affluant et latéralement à l'extérieur de la section transversale balayée de l'unité d'échange (12),
    la section transversale balayée de l'unité d'échange (12) n'est pas recouverte par le moyen de guidage d'écoulement (18, 18a, 18b, 18c),
    caractérisé en ce que
    le moyen de guidage de l'écoulement (18a, 18b, 18c) est réalisé au moins localement sur un bac d'égouttage (20) qui, en position montée du dispositif échangeur de chaleur, est prévu pour collecter le condensat formé sur l'unité d'échange (12), et/ou sur une tôle intermédiaire (24) optionnelle qui est prévue entre l'unité d'échange et le bac d'égouttage (20) destiné à collecter le condensat, et qui est prévue pour collecter la glace tombant de l'unité d'échange.
  2. Dispositif échangeur de chaleur selon la revendication 1,
    caractérisé en ce que
    le moyen de guidage d'écoulement (18, 18a, 18b, 18c) comprend au moins une portion de guidage qui est inclinée et/ou incurvée par rapport à une direction d'écoulement principale (S1) de l'air traversant l'unité d'échange (12).
  3. Dispositif échangeur de chaleur selon l'une au moins des revendications précédentes,
    caractérisé en ce que
    le moyen de guidage d'écoulement comprend au moins deux portions (18a, 18c) qui sont réalisées séparément l'une de l'autre et qui sont disposées l'une derrière l'autre dans la direction d'écoulement (S1) de l'air affluant.
  4. Dispositif échangeur de chaleur selon l'une au moins des revendications précédentes,
    caractérisé en ce que
    le moyen de guidage d'écoulement (18) est réalisé au moins localement sur un boîtier (16) entourant au moins partiellement l'unité d'échange (12).
  5. Dispositif échangeur de chaleur selon la revendication 1,
    caractérisé en ce que
    le bac d'égouttage (20) et/ou la tôle intermédiaire (24) sont pourvus d'un dispositif de chauffage (30a, 30).
  6. Dispositif échangeur de chaleur selon l'une au moins des revendications 4 à 5,
    caractérisé en ce que
    le moyen de guidage d'écoulement (18, 18a, 18b, 18c) est réalisé au moins localement d'un seul tenant avec le boîtier (16), avec le bac d'égouttage (20) et/ou avec la tôle intermédiaire (24).
  7. Dispositif échangeur de chaleur selon l'une au moins des revendications 4 à 6,
    caractérisé en ce que
    le moyen de guidage d'écoulement (18, 18a, 18b, 18c) comprend au moins localement un composant fabriqué séparément qui est fixé au boîtier (16), au bac d'égouttage (20) et/ou à la tôle intermédiaire (24).
  8. Dispositif échangeur de chaleur selon l'une au moins des revendications précédentes,
    caractérisé en ce que
    le moyen de guidage d'écoulement (18a) constitue au moins localement une partie d'une rigole (26) destinée à recueillir le condensat formé sur l'unité d'échange (12).
  9. Dispositif échangeur de chaleur selon la revendication 8,
    caractérisé en ce que
    la rigole (26) présente une section transversale en forme de V ou de U.
EP14151999.1A 2013-01-29 2014-01-21 Échangeur de chaleur Active EP2759795B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102013201366.3A DE102013201366A1 (de) 2013-01-29 2013-01-29 Wärmetauschereinrichtung

Publications (3)

Publication Number Publication Date
EP2759795A2 EP2759795A2 (fr) 2014-07-30
EP2759795A3 EP2759795A3 (fr) 2014-12-31
EP2759795B1 true EP2759795B1 (fr) 2021-09-08

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP14151999.1A Active EP2759795B1 (fr) 2013-01-29 2014-01-21 Échangeur de chaleur

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EP (1) EP2759795B1 (fr)
DE (1) DE102013201366A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017110580A1 (de) 2017-05-16 2018-11-22 Güntner Gmbh & Co. Kg Wärmeaustauschereinrichtung und Verfahren zum Austausch von Wärme zwischen Luft und einem in einem Wärmeübertrager geführten Fluid

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1593537A (en) * 1924-05-28 1926-07-20 Calorizing Company Heat exchanger
DE1628707U (de) * 1951-07-31 1951-09-27 Heinrich Schmitz Verdampfer mit tropfwasserfang- und taurinnen.
SE410042B (sv) * 1975-08-29 1979-09-17 Nordkyl Bert Karl Rudolf Med F Luftcirkulationsaggregat for lokaler innehallande frys- och kylanleggningar
DE2928774C2 (de) * 1979-07-17 1984-03-22 Bosch-Siemens Hausgeräte GmbH, 7000 Stuttgart Gefrierschrank mit einem durch natürliche Konvektion gekühlten, großräumigen Gefrierraum
JPH04191121A (ja) * 1990-11-26 1992-07-09 Nissan Motor Co Ltd 車両用熱交換器のエア案内装置
JPH07117457A (ja) * 1993-10-28 1995-05-09 Nippondenso Co Ltd 空調装置
JPH07164865A (ja) * 1993-12-13 1995-06-27 Nippondenso Co Ltd 空調装置
DE19513606A1 (de) * 1995-04-10 1996-10-17 Linde Ag Schutz-, Blend- und Luftleitgitter für einen Verdampfer
US5784896A (en) * 1996-10-18 1998-07-28 White Consolidated Industries, Inc. Freezer or refrigerator construction suitable for food service use
US6328099B1 (en) * 1999-04-21 2001-12-11 Mississippi Chemical Corporation Moving bed dryer
KR101520704B1 (ko) * 2009-01-21 2015-05-15 엘지전자 주식회사 냉장고
KR101559787B1 (ko) * 2009-01-21 2015-10-13 엘지전자 주식회사 냉장고

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Publication number Publication date
EP2759795A3 (fr) 2014-12-31
DE102013201366A1 (de) 2014-07-31
EP2759795A2 (fr) 2014-07-30

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