EP2759795A2 - Échangeur de chaleur - Google Patents

Échangeur de chaleur Download PDF

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Publication number
EP2759795A2
EP2759795A2 EP14151999.1A EP14151999A EP2759795A2 EP 2759795 A2 EP2759795 A2 EP 2759795A2 EP 14151999 A EP14151999 A EP 14151999A EP 2759795 A2 EP2759795 A2 EP 2759795A2
Authority
EP
European Patent Office
Prior art keywords
heat exchanger
flow
exchanger unit
guiding device
heat
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.)
Granted
Application number
EP14151999.1A
Other languages
German (de)
English (en)
Other versions
EP2759795A3 (fr
EP2759795B1 (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
GEA Kueba 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 GEA Kueba GmbH filed Critical GEA Kueba 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
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
    • 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, to evaporate a liquid heat transfer medium with removal of heat from the ambient air.
  • cooling systems for example, to evaporate a liquid heat transfer medium with removal of heat from the ambient air.
  • it is necessary to operate the heat exchanger devices used as efficiently as possible. That the intended for the heat exchange function components of the heat exchanger devices must be structurally optimized so that the heat can be reliably and efficiently transferred from the air to the heat transfer medium (or vice versa).
  • Corresponding heat exchanger devices should also be inexpensive to produce and easy to maintain.
  • the above object is achieved by a heat exchanger device with the features of claim 1.
  • the heat exchanger device comprises an exchanger unit that can be inflated by the air and can be flowed through by the heat transfer medium.
  • an exchanger unit that can be inflated by the air and can be flowed through by the heat transfer medium.
  • at least one flow-guiding device influencing the flow of the inflowing air is provided, which supports an inflow of edge regions of the exchanger unit.
  • the present invention is therefore based on the finding that the efficiency of a heat exchanger device can be improved if the flow in edge areas of the exchanger unit is improved in order to ensure more uniform conditions in the various areas to create the exchanger unit.
  • a corresponding flow guide is provided which deflects and directs the incoming air masses in a suitable manner.
  • Such a flow guiding device can be, for example, a passive and / or statically arranged assembly (or a corresponding individual component), which can be produced cost-effectively and, if necessary, can also be retrofitted.
  • the flow guide can also be integrated into existing components.
  • the flow guiding device is arranged in the flow direction of the inflowing air upstream and laterally outside of the flown cross section of the exchanger unit.
  • the flow-guiding device is not arranged directly in front of the exchanger unit, whereby at least partial areas of the exchanger unit would be obscured. This would in turn adversely affect the efficiency of the heat exchanger device.
  • the exchanger unit for example, deflects air flowing obliquely in order to obtain the desired flow profile.
  • air that would flow past a heat exchanger device of conventional design may be directed to the exchanger unit.
  • the flow guiding device can also contribute to avoiding the generation of turbulence in the vicinity of the flowed end face of the exchanger unit.
  • the flow guiding device may comprise at least one guide section, which is inclined and / or curved relative to a main flow direction of the air flowing or flowing through the exchanger unit. It may be provided a plurality of guide sections, which are each inclined differently to produce the desired flow profile. The guide sections can also be arranged one behind the other in the flow direction of the inflowing air. Additionally or alternatively it can be provided that the flow guide device comprises one or more curved guide sections.
  • the configuration of the guide section or sections can be adapted as desired to the particular conditions present. In particular, sections of the flow-guiding device can be designed differently depending on their position relative to the exchanger unit.
  • portions of the flow guiding device provided on the sides of the exchanger unit in the position of use of the heat exchanger device are designed differently than portions which are arranged on an upper and / or a lower side of the exchanger unit.
  • the installation-specific conditions and / or functional components, which are provided only on certain pages or in certain areas of the heat exchanger device, are taken into account.
  • the flow-guiding device may comprise 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 at least partially formed on a housing at least partially surrounding the exchanger unit.
  • the flow guide can also at least partially on a drip tray and / or an intermediate plate may be formed, which are provided for collecting condensate formed on the exchanger unit.
  • Condensate is to be understood in this context in particular water in liquid or solid form, which may form during operation of the heat exchanger device and is reflected in the rule on the exchanger unit.
  • the intermediate plate is used to collect ice that 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 remove the condensate.
  • a first section of the flow guide device can be provided on the drip tray and a second section of the flow guide device can be provided on the intermediate plate.
  • the drip pan and / or the intermediate plate may be provided with a heater to ensure that dew water dripping from the exchanger unit does not freeze on the intermediate plate. In addition, falling ice is melted and safely discharged.
  • the flow-guiding device is formed at least in sections integrally with the housing, the drip pan and / or the intermediate plate.
  • the flow-guiding device comprises at least one separately manufactured component-for example a sheet-metal or plastic component-which is fastened to the housing, the drip tray and / or the intermediate sheet. So it is possible, even conventional heat exchanger devices by attaching appropriate Retrofit components to improve the flow of the exchanger unit.
  • the flow guiding device can form, at least in sections, a channel for collecting condensate formed on the exchanger unit or can be integrated into the channel.
  • the flow guiding device can be shaped such that it contributes to a further functionality in addition to the flow line.
  • the channel may have a V-shaped or U-shaped cross section.
  • its cross section is modeled on a U which lies obliquely in the installation 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 includes one or more conduits that pass through the volume of the exchanger unit 12 to extract heat from the ambient air and supply it to the heat transfer medium.
  • To improve the heat exchange fins may be provided, which are in heat-conducting contact with the pipes to to increase the available for the heat exchange effective surface of the exchanger unit 12.
  • the fan ensures an inflow of the exchanger unit 12, which is symbolized by an arrow S 1 indicating the main flow direction.
  • the flow of the exchanger unit 12 causes the flow therethrough, which is symbolized by an arrow indicating the main flow direction S 2 .
  • the heat exchanger device 10a is suspended from a ceiling 14 of a building. It is understood that the following statements in an analogous form can also be applied to other installation situations of the heat exchanger device 10a.
  • a flow of the exchanger unit 12 is influenced in an upper edge region R, which is indicated by a dashed line. It is understood that the boundary of the edge region R in practice is not a sharp line.
  • the exchanger unit 12 is not fastened directly to the ceiling 14 but is spaced therefrom by a section 16 of a housing of the heat exchanger device 10a.
  • the housing portion 16 supports the formation of the Coanda effect, which generates a slight negative pressure immediately behind the heat exchanger means 10 a, whereby the air flow to the ceiling 14 creates / conforms.
  • a flow guide section 18 is provided which deflects a portion of the incoming air toward the exchanger unit 12.
  • the flow-conducting effect of Strömungsleitabitess 18 is indicated by the flow path s.
  • the Strömungsleitabites 18 ensures that even the edge region R of the exchanger unit 12 is traversed by sufficient air.
  • a flow guide section 18a is provided which, on the upstream 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 condensate dripping from the exchanger unit 12 and to remove it.
  • the drip tray 20 also serves to trap ice falling from the exchanger unit 12, for example, when it is defrosted.
  • the Strömungsleitabites 18 a is curved and designed such that it generates a flow path s of the air, which flows to the drip pan 20 adjacent edge region R of the exchanger unit 12. Between the Strömungsleitabites 18a and the exchanger unit 12, a gap 22 is provided so that from the flowed front side of the exchanger unit 12 falling ice can fall into the drip pan 20 and does not slip on the flow guide 18a and falls uncontrollably to the ground.
  • the drip pan 20 is provided with a drain, not shown, to dissipate the accumulated in the drip tray 20 condensate.
  • the Strömungsleitabitese 18, 18a thus ensure a uniform flow through the exchanger unit 12, wherein they are adapted to the respective existing boundary conditions and therefore formed differently.
  • the Strömungsleitabites 18 ensures that air flowing along the ceiling 14 along the upper edge region R of the exchanger unit 12 is directed. Due to the different aerodynamic environmental conditions - for example, there is no airtight boundary in the form of the ceiling 14 - the shape of the lower Strömungsleitabitess 18a is different from that of the upper Strömungsleitabitess 18th
  • shaping the flow guide portion 18a it has been considered that the occurrence of turbulence at the upstream edge of the drip pan 20 is prevented. Such turbulences would adversely affect a flow through the lower edge region R of the exchanger unit 12.
  • Fig. 2 shows the heat exchanger device 10a in a view from the front, ie seen in the direction S 1 . It can be seen that the flow guide sections 18, 18a do not obscure the flowed-on front side of the exchanger unit 12. Rather, they form together with provided on both sides of the exchanger unit 12 Strömungsleitabitesen 18 b a kind 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 to achieve a flow adapted to the respective situation of the exchanger unit 12. In principle, it is also possible for only individual sides or even only certain sections of individual sides to be provided with flow guide sections 18, 18a, 18b.
  • the Strömungsleitabitese 18, 18a, 18b may be basically the same design, but in many cases it is advantageous if they have different configurations. Instead of in Fig. 1 to be recognized curved configuration of the Strömungsleitabitese 18, 18 a, these may - as well as the Strömungsleitabroughe 18 b - be flat surfaces which are relative to the main flow direction S 1 are inclined. Likewise, it is conceivable that a plurality of inclined planes are combined with different angles of inclination in order to produce desired flow paths s for improved flow and throughflow of the edge regions R of the exchanger unit 12.
  • Fig. 3 shows a heat exchanger device 10b, which is discussed here essentially only on their configuration in the lower area. It is understood that flow-conducting elements, such as the flow guide section 18 of the heat exchanger device 10a (FIG. Fig. 1 ) - may 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 pan 20. Liquid condensate dripping down from the exchanger unit 12 or falling ice then initially falls on 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 enters a V-shaped groove 26, where it can be collected and removed in a simple manner.
  • Strömungsleitabites 18 a is provided at its ends to reduce turbulence with rounded edges 28. Between the edges 28 of the Strömungsleitabites 18 a extends substantially flat.
  • 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, eg on the floor or the roof of a building.
  • the flow of the upper edge region R is improved by the Strömungsleitabites 18, which is formed on a cover plate 16 ', which in turn is a part of a housing of the heat exchanger device 10c.
  • the channel 26 is here provided with a semicircular cross section and the flow guide portion 18a has a curved cross section between the rounded edges 28 to produce the desired geometry of the flow path s.
  • Fig. 5 shows a heat exchanger device 10d, which has a separate housing portion 16 which is provided with the Strömungsleitabites 18.
  • the exchanger unit 12 is suspended with a substructure attached thereto, which inter alia includes the intermediate plate 24 and the drip pan 20.
  • the intermediate plate 24 of the heat exchanger device 10 d is provided with a heating device 30 in order to melt ice falling from the exchanger unit 12.
  • the water produced by melting the ice and the water dripping from the exchanger unit 12 reaches the channel 26, which has the cross-section of an obliquely lying U.
  • the heating device 30 also extends into the region of the channel 26 in order to be able to rapidly melt ice formed on the front side of the exchanger unit 12 and falling down during a defrosting operation, which has passed directly into the channel 26.
  • the left and upper leg of the U of the cross section of the groove 26 is a flat surface, which is inclined relative to the main flow direction S 1 .
  • This component of the channel 26 thus forms the same time Strömungsleitabites 18 a and the Strömungsleitabites 18 a is formed so that it forms the channel 26.
  • a curved Strömungsleitabites 18 c is provided on the drip tray 20, which generates the desired geometry of the flow path s together with the Strömungsleitabites 18 a.
  • Fig. 6 shows a heat exchanger device 10e with a V-shaped groove 26 on the intermediate plate 24. Both the intermediate plate 24 and the drip tray 20 are at least partially provided with a heater 30 and 30a. The inflowing air facing the end of the channel 26 is provided with a relative to the main flow direction S 1 inclined Strömungsleitabites 18 a, which generates the desired geometry of the flow path s together with the likewise planar Strömungsleitabites 18 c of the drip tray 20.
  • the Strömungsleitabitese 18, 18a, 18b, 18c may in principle be formed integrally 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 by suitably designed Strömungsleitabitese by appropriate components are attached at the appropriate locations. In the case of changed environmental conditions, for example due to a changed installation position of the heat exchanger device, the Strömungsleitabitese can be exchanged and / or changed 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)
EP14151999.1A 2013-01-29 2014-01-21 Échangeur de chaleur Not-in-force 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 true EP2759795A2 (fr) 2014-07-30
EP2759795A3 EP2759795A3 (fr) 2014-12-31
EP2759795B1 EP2759795B1 (fr) 2021-09-08

Family

ID=49956061

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14151999.1A Not-in-force EP2759795B1 (fr) 2013-01-29 2014-01-21 Échangeur de chaleur

Country Status (2)

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

Cited By (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

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
US6328099B1 (en) * 1999-04-21 2001-12-11 Mississippi Chemical Corporation Moving bed dryer

Family Cites Families (10)

* 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
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
KR101559787B1 (ko) * 2009-01-21 2015-10-13 엘지전자 주식회사 냉장고
KR101520704B1 (ko) * 2009-01-21 2015-05-15 엘지전자 주식회사 냉장고

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
US6328099B1 (en) * 1999-04-21 2001-12-11 Mississippi Chemical Corporation Moving bed dryer

Cited By (2)

* 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
WO2018210596A1 (fr) 2017-05-16 2018-11-22 Güntner Gmbh & Co. Kg Dispositif échangeur de chaleur et procédé d'échange de chaleur entre l'air et un fluide guidé dans un échangeur de chaleur

Also Published As

Publication number Publication date
EP2759795A3 (fr) 2014-12-31
EP2759795B1 (fr) 2021-09-08
DE102013201366A1 (de) 2014-07-31

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