GB2372560A - Heat exchanger system - Google Patents
Heat exchanger system Download PDFInfo
- Publication number
- GB2372560A GB2372560A GB0104582A GB0104582A GB2372560A GB 2372560 A GB2372560 A GB 2372560A GB 0104582 A GB0104582 A GB 0104582A GB 0104582 A GB0104582 A GB 0104582A GB 2372560 A GB2372560 A GB 2372560A
- Authority
- GB
- United Kingdom
- Prior art keywords
- heat exchanger
- tubes
- strip
- gauge
- exchanger system
- 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.)
- Withdrawn
Links
- 230000015572 biosynthetic process Effects 0.000 claims description 17
- 238000005755 formation reaction Methods 0.000 claims description 17
- 239000000463 material Substances 0.000 claims description 17
- 239000011159 matrix material Substances 0.000 claims description 11
- 239000012530 fluid Substances 0.000 claims description 9
- 238000004378 air conditioning Methods 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 4
- WYTGDNHDOZPMIW-RCBQFDQVSA-N alstonine Natural products C1=CC2=C3C=CC=CC3=NC2=C2N1C[C@H]1[C@H](C)OC=C(C(=O)OC)[C@H]1C2 WYTGDNHDOZPMIW-RCBQFDQVSA-N 0.000 claims description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- 239000004411 aluminium Substances 0.000 claims description 3
- 239000002826 coolant Substances 0.000 claims description 3
- 239000003507 refrigerant Substances 0.000 claims description 3
- 230000000295 complement effect Effects 0.000 claims description 2
- 238000010276 construction Methods 0.000 claims description 2
- 230000002401 inhibitory effect Effects 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims description 2
- 239000007787 solid Substances 0.000 claims description 2
- 125000006850 spacer group Chemical group 0.000 claims description 2
- 239000002184 metal Substances 0.000 abstract 1
- 230000002411 adverse Effects 0.000 description 1
- 238000003491 array Methods 0.000 description 1
- 238000005219 brazing Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000005482 strain hardening Methods 0.000 description 1
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
- F28F1/126—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 consisting of zig-zag shaped fins
- F28F1/128—Fins with openings, e.g. louvered fins
-
- 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
- F28D1/0408—Multi-circuit heat exchangers, e.g. integrating different heat exchange sections in the same unit or heat exchangers for more than two fluids
- F28D1/0426—Multi-circuit heat exchangers, e.g. integrating different heat exchange sections in the same unit or heat exchangers for more than two fluids with units having particular arrangement relative to the large body of fluid, e.g. with interleaved units or with adjacent heat exchange units in common air flow or with units extending at an angle to each other or with units arranged around a central element
- F28D1/0435—Combination of units extending one behind the other
-
- 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
- F28D2021/008—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for vehicles
- F28D2021/0084—Condensers
-
- 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
- F28D2021/008—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for vehicles
- F28D2021/0091—Radiators
- F28D2021/0094—Radiators for recooling the engine coolant
-
- 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
- F28F9/001—Casings in the form of plate-like arrangements; Frames enclosing a heat exchange core
- F28F2009/004—Common frame elements for multiple cores
-
- 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
- F28F2215/02—Arrangements of fins common to different heat exchange sections, the fins being in contact with different heat exchange media
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Geometry (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
In a duplex type heat exchanger comprising a combined condenser (3, fig. 1) and radiator (2, fig. 1), a longitudinal groove or notch 12 runs along each fin strip 10 between, and parallel to, the flat heat exchange tubes 6, 9, in order to inhibit heat transfer between the louvred radiator fin 15 and the louvred condenser fin 16. The groove may be produced by stretching or deforming a metal sheet in order to reduce its thickness along a required line.
Description
Heat Exchanger System
The present invention relates to a heat exchanger system and in particular to a heat exchanger system suitable for vehicular use.
So called unified heat exchangers are known which comprise an assembly of plural heat exchangers typically assembled and joined face adjacent face, each for effecting a heat transfer exchange between different heat exchange circuits.
A typical unitary assembly is a combined (or unified) condenser radiator which comprises a vehicle coolant circuit radiator arrangement mounted face adjacent face with a condenser arrangement for a vehicle refrigerant air conditioning circuit. Such an arrangement is shown for example in EP-A-0367078. In the arrangement shown in EP-A0367078 the problem of heat transfer across the airway matrix fin strips between the tubes in the radiator and condenser is acknowledged. The temperature differential between the working fluid in the tubes of the respective condenser and radiator under nominal operating conditions results in adverse heat transfer between the condenser and radiator transversely along the fin airway strips. In EP
A-0367078 a solution is proposed by providing slits in the airway fins intermediate the tube bank cores of the adjacent heat exchanger arrangements.
An alternative and improved solution has now been devised.
According to a first aspect, the present invention provides a heat exchanger system comprising : a first heat exchanger arrangement comprising a first bank of heat exchanger tubes, adjacent tubes having spaces therebetween; a second heat exchanger arrangement comprising a second bank of heat exchanger tubes, adjacent tubes having spaces therebetween, the first and second banks of tubes being substantially side by side the tubes extending in a common general direction; a matrix for directing flow of a heat exchange fluid through the heat exchanger system externally of the tubes, the matrix comprising a flow directing strip extending longitudinally between adjacent tubes in a respective bank and spanning to extend transversely across adjacent banks, the flow directing strip having a gauge reduction portion inhibiting heat transfer via the strip between the banks of tubes.
The gauge reduction portion provides a restricted heat transfer path between the banks of tubes but maintains a good structurally integral link or bridge between the banks of tubes.
The gauge reduction portion may comprise a work hardened/plastically deformed portion which may be formed by stretching, mechanical deformation or otherwise by material displacement. Material deformation may alternatively be
effected in ways such as notching grooving or otherwise, resulting in little or no stretching or work hardening.
The gauge reduction portion may comprise or include a gauge reduction formation running along the strip in the longitudinal direction.
The gauge reduction portion may comprise or include one or more notches, grooves or channel formations formed at a first surface of the strip.
The gauge reduction portion may comprise a notch, groove or channel formation formed at a first surface of the strip and a complementary configured notch, groove or channel formation formed at a second surface of the strip, a restricted waist portion being thereby defined.
The gauge reduction portion may include material stretched (plastically deformed) in the direction of spacing of the banks of tubes.
The strip is preferably formed in a serpentine configuration the gauge reduction portion preferably extending longitudinally along a median line along the serpentine formed strip.
The gauge reduction portion beneficially extends longitudinally at a position intermediate the spaced banks of tubes.
The gauge reduction portion provides a solid bridge between spaced portions of the strip interleaving the tubes in respective banks.
The gauge reduction portion has a minimum material thickness reduced by 50% or more compared to the standard gauge of the strip portions interleaving the tubes in the banks. More preferably the gauge reduction is 60% or above, more preferably 70% or above most preferably 80% or above, compared to the standard strip gauge. The thinner the gauge of the gauge reduction portion the better (in order to minimise the heat transfer) providing the integrity of the bridge across the tube banks is sufficiently maintained.
The gauge reduction portion may comprise or include a plurality of gauge reduction formations running in the direction of the tubes and spaced from each other in side by side relationship.
The heat exchanger system according to the invention is preferably substantially of brazed aluminium construction.
The heat exchanger system preferably includes: a pair of headers at opposed ends of the first bank of tubes and communicating with opposed respective ends of the tubes in the respective bank ; and, a pair of headers at opposed ends of the second bank of tubes and communicating with opposed
respective ends of the tubes in the respective bank.
The tubes in the first bank preferably contain a heat exchange fluid associated with a first heat exchange circuit, the heat exchange tubes in the second bank beneficially containing a heat exchange fluid associated with a second heat exchange circuit.
Beneficially one of the first and second heat exchanger arrangements comprises a condenser of a refrigerant circuit of an vehicle air conditioning arrangement, the other of the first and second heat exchanger comprising a part of the engine coolant circuit.
According to a further aspect the invention provides an airway fin matrix strip for a heat exchanger system, comprising an elongate strip of material formed to have one or more longitudinally running gauge reduction formations providing a narrow gauge reduction bridge between spaced thicker gauge portions, and a serpentine configuration profile extending in the longitudinal direction of the strip.
Preferred features of the strip correspond to the preferred strip features presented in accordance with the first aspect of the invention.
According to a further aspect, the invention provides a method of manufacturing a spacer airway fin matrix strip for a heat exchanger system, the method comprising forming an
elongate strip of plastically deformable material to have one or more longitudinally running gauge reduction formations providing a narrow gauge reduction bridge between spaced thicker gauge portions, and a serpentine configuration profile extending in the longitudinal direction of the strip.
The invention will now be further described in specific embodiments and by way of example only with reference to the accompanying drawings, in which:
Figure 1 is a schematic perspective view of a heat exchanger system according to the invention;
Figure 2 is a schematic perspective view of a portion of the arrangement shown in Figure 1 ;
Figure 3 is a part sectional view of the fin airway matrix strip used in the arrangement of Figure 2 ;
Figures 4 to 7 are sectional views of alternative arrangements of airway matrix strip.
Referring to the drawings and initially Figure 1, there is shown a unified condenser radiator arrangement 1, comprising a vehicle radiator 2 assembled and brazed together with (and orientated forwardly of) an airconditioning circuit condenser 3. Radiator portion 2 is provided with respective spaced headers 4,5 and a respective bank of tubes 6 spaced from one another and extending between the headers 4,5.
Condenser 3 includes a corresponding pair of spaced headers
7, 8 and a respective bank of tubes 9 extending between the headers. Respective serpentine fin airway matrix strips 10 extend along the length of tubes 9,10 in the respective banks and have a transverse dimension ensuring that the respective strips 10 span across the gap between the respective banks of tubes 6,9. Typically the headers, tubes and fin strips 10 are of aluminium material (coated with a suitable brazing material) following assembly and jigging, the entire unified condenser radiator is braised in a single one shot process. The fin strips 10 are provided with louvre slit arrays 15,16 for improved heat dissipation.
It is an important feature that the fin strips 10 span transversely to extend intermediate both banks of tubes 6, 9. If separate fin strips were used for each bank of tubes 6,9, then airflow transversely through the unified condenser radiator arrangement will be disrupted resulting in less than optimum performance.
In view of the fact that the heat exchange fluids contained within respective banks of tubes 6,9 will typically be at markedly different temperatures during vehicle operation, it is important to minimise heat transfer across the respective strips 10 between the two banks of tubes 6,9. According to the present invention, this is achieved by forming in the strips 10 a median, longitudinally extending, gauge reduction zone 12 minimising the heat conduction crosssectional area of the fin strip material 10 at a zone intermediate the respective of banks of tubes 6,9.
As shown in Figures 2 and 3, the longitudinally running gauge reduction portion 12 may comprise, for example, a V shaped notch or slot 13 provided in one surface of the strip.
As shown in Figures 4,5 and 6, the notches may be of various shapes and, for example (as shown in Figure 4), provided on both sides of the strip 10 in order to provide a narrow waisted reduced portion 14.
In the embodiment shown in Figure 5, waisted portion 14 has been stretched transversely (plastically deformed in opposed directions of arrow A) to produce a very thin wasted portion 14.
In the arrangement shown in Figure 6, a pair of longitudinally running notches or grooves 13e, 13d are provided in one surface of strip 10, complementarily arranged with a further groove or notch 13f in the other surface to provide a serpentine heat conduction path of reduced gauge between the opposed spaced fin portions of fin strip 10.
Whilst the invention has been described primarily in a vehicle unified condenser radiator arrangement, it is clear that the invention is of benefit in heat exchanger systems where heat exchanger arrangements operating at different heat exchange fluid temperatures are combined as integral units. The provision of a reduced gauge portion rather than an aperture slitted or slotted portion intermediate the two banks of tubes provides for greater structural integrity of the heat exchanger system.
Claims (22)
1. A heat exchanger system comprising : a first heat exchanger arrangement comprising a first bank of heat exchanger tubes, adjacent tubes having spaces therebetween ; a second heat exchanger arrangement comprising a second bank of heat exchanger tubes, adjacent tubes having spaces therebetween, the first and second banks of tubes being substantially side by side the tubes extending in a common general direction; a matrix for directing flow of a heat exchange fluid through the heat exchanger system externally of the tubes, the matrix comprising a flow directing strip extending longitudinally between adjacent tubes in a respective bank and spanning to extend transversely across adjacent banks, the flow directing strip having a gauge reduction portion inhibiting heat transfer via the strip between the banks of tubes.
2. A heat exchanger system according to claim 1, wherein the gauge reduction portion comprises a work hardened/plastically deformed portion.
3. A heat exchanger system according to claim 1 or claim
2, wherein the gauge reduction portion comprises a formation running along the strip in the longitudinal direction.
4. A heat exchanger system according to any preceding claim, wherein the gauge reduction formation comprises a notch, groove or channel formation formed at a first surface of the strip.
5. A heat exchanger system according to claim 4, wherein the gauge reduction portion comprises a notch, groove or channel formation formed at a first surface of the strip and a complementary configured notch, groove or channel formation formed at a second surface of the strip, a restricted waist portion being thereby defined.
6. A heat exchanger system according to any preceding claim, wherein the gauge reduction portion includes material stretched (plastically deformed) in the direction of spacing of the banks of tubes.
7. A heat exchanger system according to any preceding claim, wherein the strip is formed in a serpentine configuration the gauge reduction portion extending longitudinally along a median line along the serpentine formed strip.
8. A heat exchanger system according to any preceding claim, wherein the gauge reduction portion extends longitudinally at a position intermediate the spaced banks of tubes.
9. A heat exchanger according to any preceding claim, wherein the gauge reduction portion provides a solid bridge between spaced portions of the strip interleaving the tubes in respective banks.
10. A heat exchanger system according to any preceding claim, wherein the gauge reduction portion has a minimum material thickness reduced by 50% or more compared to the standard gauge of the strip portions interleaving the tubes in the banks.
11. A heat exchanger system according to any preceding claim, wherein the gauge reduction portion has a minimum material thickness reduced by 60% or more compared to the standard gauge of the strip portions interleaving the tubes in the banks.
12. A heat exchanger system according to any preceding claim, wherein the gauge reduction portion has a minimum material thickness reduced by 70% or more compared to the standard gauge of the strip portions interleaving the tubes in the banks.
13. A heat exchanger system according to any preceding claim, wherein the gauge reduction portion has a minimum material thickness reduced by 80% or more compared to the standard gauge of the strip portions interleaving the tubes in the banks.
14. A heat exchanger system according to any preceding claim, wherein the gauge reduction portion comprises a
plurality of gauge reduction formations running in the direction of the tubes and spaced from each other in side by side relationship.
15. A heat exchanger system according to any preceding claim substantially of brazed aluminium construction.
16. A heat exchanger system according to any preceding claim including: a pair of headers at opposed ends of the first bank of tubes and communicating with opposed respective ends of the tubes in the respective bank ; and, a pair of headers at opposed ends of the second bank of tubes and communicating with opposed respective ends of the tubes in the respective bank.
17. A heat exchanger according to any preceding claim, herein the tubes in the first bank contain a heat exchange fluid associated with a first heat exchange circuit, the heat exchange tubes in the second bank containing a heat exchange fluid associated with a second heat exchange circuit.
18. A heat exchanger system according to claim 17, wherein one of the first and second heat exchanger arrangements comprises a condenser of a refrigerant circuit of an vehicle air conditioning arrangement, the other of the
first and second heat exchanger comprising a part of the engine coolant circuit.
19. An airway fin strip for a heat exchanger system, comprising a strip of material formed to have one or more gauge reduction formations providing a narrow gauge reduction bridge between spaced thicker gauge portions.
20. An airway fin matrix strip according to claim 19 comprising an elongate strip of material having one or more longitudinally running gauge reduction formations and a serpentine configuration profile extending in the longitudinal direction of the strip.
21. A method of manufacturing a spacer airway fin strip for a heat exchanger system, the method comprising forming an elongate strip of plastically deformable material to have one or more gauge reduction formations providing a narrow gauge reduction bridge between spaced thicker gauge portions.
22. A method according to claim 21, wherein the strip is elongate, the gauge reduction formations being orientated to run longitudinally, the strip having a serpentine configuration profile extending in the longitudinal direction of the strip.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB0104582A GB2372560A (en) | 2001-02-24 | 2001-02-24 | Heat exchanger system |
| PCT/GB2002/000778 WO2002068890A1 (en) | 2001-02-24 | 2002-02-22 | Heat exchanger system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB0104582A GB2372560A (en) | 2001-02-24 | 2001-02-24 | Heat exchanger system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB0104582D0 GB0104582D0 (en) | 2001-04-11 |
| GB2372560A true GB2372560A (en) | 2002-08-28 |
Family
ID=9909410
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB0104582A Withdrawn GB2372560A (en) | 2001-02-24 | 2001-02-24 | Heat exchanger system |
Country Status (2)
| Country | Link |
|---|---|
| GB (1) | GB2372560A (en) |
| WO (1) | WO2002068890A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003050468A1 (en) * | 2001-12-12 | 2003-06-19 | Modine Manufacturing Company | Split fin for a heat exchanger |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2948724B1 (en) | 2013-01-28 | 2019-05-29 | Carrier Corporation | Multiple tube bank heat exchange unit with manifold assembly |
| EP2962054A4 (en) * | 2013-03-01 | 2016-11-02 | Sapa As | MULTIPLE ORIFICE EXTRUSION DESIGN (MPE) |
| EP3074709B1 (en) | 2013-11-25 | 2021-04-28 | Carrier Corporation | Dual duty microchannel heat exchanger |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0431917A1 (en) * | 1989-12-07 | 1991-06-12 | Showa Aluminum Kabushiki Kaisha | Consolidated duplex heat exchanger |
| EP0866298A2 (en) * | 1997-03-17 | 1998-09-23 | Denso Corporation | Heat exchanger having several heat exchanging portions |
| WO1999030098A1 (en) * | 1997-12-08 | 1999-06-17 | Zexel Corporation | Fin structure for unitary type heat exchanger |
| GB2356040A (en) * | 1999-09-29 | 2001-05-09 | Denso Corp | Double heat exchanger for vehicle air conditioner |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58108394A (en) * | 1981-12-21 | 1983-06-28 | Hitachi Ltd | Heat exchanger |
| JPH0645155Y2 (en) | 1988-10-24 | 1994-11-16 | サンデン株式会社 | Heat exchanger |
| US5186244A (en) * | 1992-04-08 | 1993-02-16 | General Motors Corporation | Tube design for integral radiator/condenser |
| JPH10281693A (en) * | 1997-03-31 | 1998-10-23 | Zexel Corp | Duplx type integral heat-exchanger |
-
2001
- 2001-02-24 GB GB0104582A patent/GB2372560A/en not_active Withdrawn
-
2002
- 2002-02-22 WO PCT/GB2002/000778 patent/WO2002068890A1/en not_active Ceased
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0431917A1 (en) * | 1989-12-07 | 1991-06-12 | Showa Aluminum Kabushiki Kaisha | Consolidated duplex heat exchanger |
| EP0866298A2 (en) * | 1997-03-17 | 1998-09-23 | Denso Corporation | Heat exchanger having several heat exchanging portions |
| WO1999030098A1 (en) * | 1997-12-08 | 1999-06-17 | Zexel Corporation | Fin structure for unitary type heat exchanger |
| GB2356040A (en) * | 1999-09-29 | 2001-05-09 | Denso Corp | Double heat exchanger for vehicle air conditioner |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003050468A1 (en) * | 2001-12-12 | 2003-06-19 | Modine Manufacturing Company | Split fin for a heat exchanger |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2002068890A1 (en) | 2002-09-06 |
| GB0104582D0 (en) | 2001-04-11 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |