EP2486356A2 - Innerer wärmetauscher, insbesondere für kraftfahrzeugklimaanlagen - Google Patents
Innerer wärmetauscher, insbesondere für kraftfahrzeugklimaanlagenInfo
- Publication number
- EP2486356A2 EP2486356A2 EP10752757A EP10752757A EP2486356A2 EP 2486356 A2 EP2486356 A2 EP 2486356A2 EP 10752757 A EP10752757 A EP 10752757A EP 10752757 A EP10752757 A EP 10752757A EP 2486356 A2 EP2486356 A2 EP 2486356A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- heat exchanger
- inner heat
- exchanger according
- individual tubes
- flow
- 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
Links
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
- F28D7/10—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 arranged one within the other, e.g. concentrically
-
- 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
- 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
- F28F9/0246—Arrangements for connecting header boxes with flow lines
- F28F9/0251—Massive connectors, e.g. blocks; Plate-like connectors
- F28F9/0253—Massive connectors, e.g. blocks; Plate-like connectors with multiple channels, e.g. with combined inflow and outflow channels
Definitions
- Inner heat exchanger in particular for motor vehicle air conditioners
- the invention relates to an internal heat exchanger, in particular for
- Motor vehicle air conditioners comprising a housing for separately guiding a cooling fluid flow and a fluid flow to be cooled, which are arranged above the housing ends
- Connection components are supplied or removed.
- Internal heat exchangers are used as fuel coolers, as cooling elements for oil pressure pipes and as heat exchangers for stationary cooling systems. They are generally used for cooling fluid or gas transporting media. A major application of the internal heat exchangers is in automotive air conditioning systems.
- the refrigerant in the high-pressure side channel is cooled down without additional energy being consumed.
- From EP 1 202 016 A2 is a one-piece heat exchanger tube with a
- Multi-chamber profile known having a central channel to the more
- External channels are arranged.
- the outer channels are divided by intermediate walls which extend in the radial direction.
- On the wall of the central channel are
- Projections provided which extend into the central channel. These projections serve to reduce the cross-sectional area and thus increase the Flow rate.
- the projections may be helical.
- the inner channel is used as a high-pressure side, the outer channels are used as a low-pressure side.
- the heat exchange is not optimal in this device, since the
- External channels are arranged on a concentric circle around the central channel and lie only with their inclined toe points in the vicinity of the high pressure side refrigerant fluid leading to the central channel.
- the heat transfer between the refrigerant fluid in the central channel and the cooler refrigerant fluid in the outer channels is thus not very efficient.
- an inner heat exchanger is known, which is constructed of a two-part Koaxialrohrsystem.
- an inner tube is inserted or coextruded together with the outer tube.
- the annular space between inner tube and outer tube represents an outer tube longitudinal channel, which is divided by webs or corrugated ribs into a plurality of parallel outer longitudinal channels.
- Heat exchanger known, which is designed for the separate management of the two, different pressure level having refrigerant flows.
- a pressure level having refrigerant flows In the interior of a
- Inner tube is provided a turbulence generator in the form of a helix.
- the helix deflects the refrigerant flowing in the inner tube, so that no laminar flow can form in the wall region. This is intended to produce improved mixing and improved heat exchange.
- the invention has the object of providing an inner heat exchanger of the type described above in such a way that the efficiency of heat transfer between the two separated by the inner heat exchanger conducted fluid flows is increased.
- connection components are provided at both ends of the cylindrical flow body through which the fluids which flow through the inner heat exchanger mainly in countercurrent, separately from each other or are derived ,
- a cylindrical flow body representing the housing is in one
- Inner heat exchanger on an outer tube into which the flow body fitted is arranged.
- the outer tube forms at its ends a projection over the
- outer tube and flow body are integrally formed. This has essentially manufacturing advantages.
- the individual tubes have a star-shaped cross-section.
- the cooling surface is increased again due to the larger surface area.
- a mushroom-shaped, axially extending spacer is arranged at the end face of the flow body opposite the baffle surface, in its collar-shaped circumference
- the tube interior in sub-channels dividing webs disposed continuously and the webs have a dividing the pipe inner cross-section cross-shaped arrangement on.
- the flow rate of the cooling fluid flow and the heat transfer coefficient are increased by this design.
- the invention provides a powerful internal heat exchanger in a compact design, which is particularly suitable for applications in motor vehicle air conditioning systems, in particular in C0 2 air conditioning systems of motor vehicles. This inner
- Heat exchanger is also used as a powerful fuel cooler in the
- FIG. 1 shows an internal heat exchanger with a housing forming a
- cylindrical flow body which is inserted into an outer tube, in an explosive, perspective, schematic representation
- FIG. 2 shows the flow body of the inner heat exchanger used in the outer tube in front view
- FIG. 3 shows the flow body used in the outer tube of the inner heat exchanger in longitudinal section along line II - II in Fig. 2.
- Fig. 4 the outer tube to be used, a tube bundle leading
- FIG. 5 shows the flow body shown in Figure 4 in half section.
- 6 shows a collection flange of one of the two connection components in longitudinal section;
- FIG. 7 shows an outer connecting flange of one of the two connecting components with a distributor ring mounted on its connecting piece;
- Figures 10 + 11 are the frontal views of the flow body shown in Figure 9;
- Fig. 13 the flow body shown in Figs. 9 to 12, used in
- the inner heat exchanger shown in Fig. 1 has an outer tube 11 and a suitably inserted into the outer tube 11, cylindrical flow body 20 on.
- this flow body 20 lying on a circumference nine individual tubes 12 are arranged axially parallel.
- a fluid flow to be cooled (hereinafter referred to as "hot” fluid flow) runs in the direction of the arrow A.
- the cooling countercurrent (hereinafter referred to as “cold” fluid flow) is guided by the flow body 20 and flows through the heat exchanger in the direction of the arrow B.
- connection components 13, 14 and 15, 16 are respectively provided at both ends of the flow body 20, via which the fluid flows are separated from one another predominantly in countercurrent operation be added or derived.
- Each connection component 13, 14 or 15, 16 is essentially constructed in two parts from an outer connection flange 14 or 16 and a respective collector flange 13 or 15.
- Each collector flange 13 and 15 respectively has nine through-connection openings 17, which receive the ends of the nine individual tubes 12 tightly after assembly of the heat exchanger.
- connection openings 17 terminate in an interconnected by the mating of the connecting flange 14 and 16 with the respective Sammlerflansch 13 and 15 formed annular collecting channel 18, via a lying outside the central axis port hole 19 in the connection flange 14 and 16 with the corresponding, not here connected fluid circuit is connected.
- connection components 13, 14 and 15, 16 are of identical design and each have a continuous, central central opening 21 which is sealed with the
- Flow body 20 is aligned and connects the flow body 20 flowing through cold fluid with the corresponding, not shown here fluid circuit.
- connection component 13, 14 or 15, 16 is as follows with the
- the collector flange 13 and 15 has a central connecting piece 22 with two circumferential grooves 23 and 24, in each of which a sealing ring 25 and 26 is introduced.
- the collector flange 13 and 15 is clip with its connection 22 fittingly inserted into a protruding edge region of the outer tube 11 sealing and frontally sealed to the individual tubes 12 of the flow body 20.
- the outer connection flanges 14 and 16 each have two mutually coaxially arranged sockets 28 and 29.
- the connecting piece 28 with the larger
- Diameter has a circumferential groove 31 for receiving a sealing ring 32.
- the sealing nozzle 29 with a smaller diameter also has a circumferential groove 34 for receiving a further sealing ring 33.
- the connecting piece 28 is formed as an annular wall which surrounds a circumferential distribution ring 35, which has a central Opening 50 which has a larger inner diameter than that
- the distributor ring 35 is clamped with an outer bent-back collar 5 i on the free end of the connecting piece 28. At the other end of the distributor ring 35, this has a radially inwardly projecting bottom 52, the end 53 axially
- connection flange 14 and 16 is with its connection piece 28 in the
- Collector Fiansch 13 or 15 inserted.
- the small sealing nozzle 29 seals the inlet and outlet of the cold fluid flow to the fürfiussharm 20 in the connecting piece 22 of the collector flange 13 and 15 from.
- the bearing lugs 27 in the collector flanges 13, 15 and the connecting flanges 14 and 16 are used to fasten the flanges together and the tight clamping of the flow body 20th
- Connection component 15, 16 and connection component 13, 14 are constructed identically in this embodiment. However, it may also be sufficient to provide the distributor ring 35 only in the connection component 15, 16, which is provided in the feed direction of the hot fluid flow.
- the distributor ring 35 serves to distribute the hot fluid flow supplied via the connection bore 19 situated outside the center axis, which is distributed via the two distributor spaces 18 and 54 over the entire annular cross section in the connection flange 14 or 16 and thus uniformly connects all connection openings 19 in the respective one
- Passage body 20 has to provide turbulence in the incoming cold fluid flow produce a pointed outwardly tapering surface 42 (FIG. 2).
- the through-body 20 is in each case perforated over its entire length (FIG. 5), wherein a single opening in the form of a longitudinal bore 43 with a larger inner diameter than the outer diameter of the respective individual tube 12 is provided for each individual tube 12.
- the introduced cold fluid stream hits the baffle 42, which has a central,
- tip-shaped protrusion 44 has.
- the cold fluid flow is deflected radially to the longitudinal bores 43.
- the cold fluid flow flows through the annular gaps 45, which are between the outer circumference of the individual tubes 12 and the respective longitudinal bore 43 of the flow body 20 (FIG. 2).
- Each individual pipe 12 is in the associated, a pipe longitudinal channel performing
- Longitudinal bore 43 flows around a partial flow of the cold fluid flow. This results in a defined cooling with improved heat exchange.
- Flow body 20 annular covering wall 46 ( Figure 3 and Figure 5) arranged at an axial distance from the main body of the fürfiuss stresses 20 having a central opening 47 for the outflow of cold fluid flow. Due to the axial distance of the wall 46, a cylindrical cavity 48 is formed at the end of the flow body 20.
- the annular surface of the wall 46 is pierced by locating bores 49 located on a circumference through which the ends of the individual tubes 12 of the tube bundle project suitably so as to be connected via the aligned connection openings 17 of the collection fins 15 to the annular distributor space 18 in the connection component 15, 16 ,
- the fürfiuss stresses 20 forms with its longitudinal bores 43 inner, axially parallel pipe longitudinal channels in which the parallel individual tubes 12 are arranged.
- the cold fluid conducted through the through-body 20 can directly contact and flush around the individual tubes 12 carrying the hot fluid flow, so that an efficient cooling of the hot fluid flow flowing in the individual tubes 12 takes place.
- the guidance of the cold and hot fluids may alternatively be provided in cocurrent or countercurrent.
- FIGS. 9 to 13 show an alternative embodiment of the flow body 20 '.
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)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE200910044119 DE102009044119A1 (de) | 2009-09-28 | 2009-09-28 | Innerer Wärmetauscher, insbesondere für Kraftfahrzeugklimaanlagen |
| PCT/EP2010/062845 WO2011036044A2 (de) | 2009-09-28 | 2010-09-02 | Innerer wärmetauscher, insbesondere für kraftfahrzeugklimaanlagen |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP2486356A2 true EP2486356A2 (de) | 2012-08-15 |
| EP2486356B1 EP2486356B1 (de) | 2013-07-03 |
Family
ID=43662552
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP10752757.4A Active EP2486356B1 (de) | 2009-09-28 | 2010-09-02 | Innerer wärmetauscher, insbesondere für kraftfahrzeugklimaanlagen |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP2486356B1 (de) |
| CN (1) | CN102667389B (de) |
| DE (1) | DE102009044119A1 (de) |
| WO (1) | WO2011036044A2 (de) |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1134397B (de) * | 1961-03-25 | 1962-08-09 | Balcke Ag Maschbau | Stehender Doppelrohrwaermeaustauscher mit innenliegenden Verbindungsrohren zwischen Mantelraum und Deckelraeumen |
| FR2507759A1 (fr) * | 1981-06-15 | 1982-12-17 | Walter Jean Jacques | Echangeur de chaleur constitue d'un bloc de matiere conductrice fore de canaux pour le passage des fluides |
| DE19719256B4 (de) * | 1997-05-07 | 2005-08-18 | Valeo Klimatechnik Gmbh & Co. Kg | Mehr als zweiflutiger Flachrohrwärmetauscher für Kraftfahrzeuge mit Umlenkboden sowie Herstelungsverfahren |
| DE19944950B4 (de) | 1999-09-20 | 2008-01-31 | Behr Gmbh & Co. Kg | Klimaanlage mit innerem Wärmeübertrager |
| DE10053000A1 (de) | 2000-10-25 | 2002-05-08 | Eaton Fluid Power Gmbh | Klimaanlage mit innerem Wärmetauscher und Wärmetauscherrohr für einen solchen |
| US6626235B1 (en) * | 2001-09-28 | 2003-09-30 | Ignas S. Christie | Multi-tube heat exchanger with annular spaces |
| CN100368752C (zh) * | 2001-12-21 | 2008-02-13 | 贝洱两合公司 | 用于汽车的热交换器 |
| DE102005056651A1 (de) | 2005-11-25 | 2007-05-31 | Behr Gmbh & Co. Kg | Koaxialrohr oder Rohr-in-Rohr-Anordnung, insbesondere für einen Wärmetauscher |
| DE102008038140A1 (de) * | 2008-08-18 | 2010-02-25 | Krones Ag | Röhrenwärmeüberträger, Doppelumlenkbogen für Röhrenwärmeüberträger, Adapter für Röhrenwärmeüberträger sowie System und Verfahren zur Wärmeübertragung zwischen wenigstens zwei Lebensmittelströmen |
-
2009
- 2009-09-28 DE DE200910044119 patent/DE102009044119A1/de not_active Withdrawn
-
2010
- 2010-09-02 EP EP10752757.4A patent/EP2486356B1/de active Active
- 2010-09-02 WO PCT/EP2010/062845 patent/WO2011036044A2/de not_active Ceased
- 2010-09-02 CN CN201080043284.2A patent/CN102667389B/zh active Active
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2011036044A2 * |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2011036044A3 (de) | 2011-07-21 |
| DE102009044119A1 (de) | 2011-03-31 |
| CN102667389B (zh) | 2014-04-30 |
| WO2011036044A2 (de) | 2011-03-31 |
| EP2486356B1 (de) | 2013-07-03 |
| CN102667389A (zh) | 2012-09-12 |
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