EP3137836A1 - Verbesserter wärmetauscher - Google Patents
Verbesserter wärmetauscherInfo
- Publication number
- EP3137836A1 EP3137836A1 EP15721968.4A EP15721968A EP3137836A1 EP 3137836 A1 EP3137836 A1 EP 3137836A1 EP 15721968 A EP15721968 A EP 15721968A EP 3137836 A1 EP3137836 A1 EP 3137836A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- heat exchanger
- manifold
- distance
- fins
- tubes
- 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
- 230000008878 coupling Effects 0.000 claims 1
- 238000010168 coupling process Methods 0.000 claims 1
- 238000005859 coupling reaction Methods 0.000 claims 1
- 239000003507 refrigerant Substances 0.000 description 9
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 239000012530 fluid Substances 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 238000005057 refrigeration Methods 0.000 description 3
- 230000035882 stress Effects 0.000 description 3
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 2
- 230000008602 contraction Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 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 description 1
- 230000004075 alteration Effects 0.000 description 1
- 238000005219 brazing Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000012809 cooling fluid Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Classifications
-
- 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
-
- 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
- F28D1/053—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being straight
- F28D1/0535—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being straight the conduits having a non-circular cross-section
- F28D1/05366—Assemblies of conduits connected to common headers, e.g. core type radiators
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F2265/00—Safety or protection arrangements; Arrangements for preventing malfunction
- F28F2265/26—Safety or protection arrangements; Arrangements for preventing malfunction for allowing differential expansion between elements
Definitions
- This invention relates generally to heat exchangers and, more particularly, to microchannel heat exchangers for use in air conditioning and refrigeration vapor compression systems.
- Heating, ventilation, air conditioning and refrigeration (HVAC&R) systems include heat exchangers to reject or accept heat between the refrigerant circulating within the system and surroundings.
- a microchannel heat exchanger includes two or more containment forms, such as tubes, through which a cooling or heating fluid (i.e. refrigerant or a glycol solution) is circulated.
- the tubes typically have a flattened cross-section and multiple parallel flow channels. Fins are typically arranged to extend between the tubes to air in the transfer of thermal energy between the heating/cooling fluid and the surrounding environment.
- the fins have a corrugated pattern, incorporate louvers to boost heat transfer, and are typically secured to the tubes via brazing.
- a thermal stress acts on the region of the heat exchanger at the joints between the heat exchanger tubes and adjacent headers. This is because a header of the heat exchanger thermally expands by exposure to a high temperature, while the fins coupled to the heat exchanger tubes remain at a lower temperature. Therefore, each of the joints between the high temperature manifold and the low temperature tubes is subject to a high stress alternating between tensile and compressive stress due to simultaneous occurrence of expansion and contraction at each of the joints. As a result, cracking of a portion of the heat exchanger may occur, resulting in a decreased heat exchanger fatigue life.
- a heat exchanger including a first manifold and a second manifold.
- the first manifold and the second manifold are separated from one another.
- a plurality of heat exchanger tubes is arranged in a spaced parallel relationship.
- the heat exchanger tubes fluidly couple the first manifold and the second manifold.
- a plurality of fins is attached to the plurality of heat exchanger tubes such that a first end of each fin is spaced apart from the first manifold by a first distance.
- FIG. 1 is a schematic diagram of an example of a refrigeration system
- FIG. 2 is a perspective view of a microchannel heat exchanger according to an embodiment of the invention.
- FIG. 3 is a cross-sectional view of a microchannel heat exchanger according to an embodiment of the invention.
- FIG. 4 is a cross-sectional view of a microchannel heat exchanger according to an embodiment of the invention.
- FIG. 1 An example of a basic vapor compression system 20 is illustrated in FIG. 1, including a compressor 22, configured to compress a refrigerant and deliver it downstream to a condenser 24. From the condenser 24, the cooled liquid refrigerant passes through an expansion device 26 to an evaporator 28. From the evaporator 28, the refrigerant is returned to the compressor 22 to complete the closed-loop refrigerant circuit.
- FIG. 2-4 a heat exchanger 30 configured for use in the vapor compression system 20 is illustrated in more detail.
- a heat exchanger 30 configured for use in the vapor compression system 20 is illustrated in more detail.
- the heat exchanger 30 is a single tube bank microchannel heat exchanger 30; however, microchannel heat exchangers having mulitple tube banks, as well as other types of heat exchangers, such as tube and fin heat exchangers for example, are within the scope of the invention.
- the heat exchanger 30 includes a first manifold or header 32, a second manifold or header 34 spaced apart from the first manifold 32, and a plurality of heat exchange tubes 36 extending in a spaced parallel relationship between and connecting the first manifold 32 and the second manifold 34.
- the heat exchanger 30 may be used as either a condenser 24 or an evaporator 28 in the vapor compression system 20.
- the manifolds 32, 34 are oriented generally horizontally and tubes 36 extend vertically between the two headers 32, 34, as shown in FIG. 2.
- the headers 32, 34 are typically vertically oriented such that the tubes 36 extend generally horizontally through the heat exchanger 30, as shown in FIG. 3.
- the heat exchanger 30 may be configured in a single pass arrangement, such that refrigerant flows from the first header 32 to the second header 34 through the plurality of heat exchanger tubes 36 in the flow direction indicated by arrow B (FIG. 2).
- the heat exchanger 30 is configured in a multi-pass flow arrangement.
- fluid is configured to flow from the first manifold 32 to the second manifold 34, in the direction indicated by arrow B, through a first portion of the heat exchanger tubes 36, and back to the first manifold 32, in the direction indicated by arrow C, through a second portion of the heat exchanger tubes 36.
- the heat exchanger 30 may additionally include guard or "dummy" tubes (not shown) extending between its first and second manifolds 32, 34 at the sides of the tube bank. These "dummy" tubes do not convey refrigerant flow, but add structural support to the tube bank.
- each heat exchange tube 36 comprises a flattened heat exchange tube having a leading edge 40, a trailing edge 42, a first surface 44, and a second surface 46.
- the leading edge 40 of each heat exchanger tube 36 is upstream of its respective trailing edge 42 with respect to an airflow A through the heat exchanger 36.
- the interior flow passage of each heat exchange tube 36 may be divided by interior walls into a plurality of discrete flow channels 48 that extend over the length of the tubes 36 from an inlet end to an outlet end and establish fluid communication between the respective first and second manifolds 32, 34.
- the flow channels 48 may have a circular cross-section, a rectangular cross-section, a trapezoidal cross-section, a triangular cross-section, or another non-circular cross-section.
- the heat exchange tubes 36 including the discrete flow channels 48 may be formed using known techniques and materials, including, but not limited to, extruded or folded.
- a plurality of heat transfer fins 50 may be disposed between and rigidly attached, usual ly by a furnace braze process, to the heat exchange tubes 36, in order to enhance external heat transfer and provide structural rigidity to the heat exchanger 30,
- Each folded fin 50 is formed from a plurality of connected strips or a single continuous strip of fin material tightly folded in a ribbon-like serpentine fashion thereby providing a plurality of closely spaced fins 52 that extend generally orthogonal to the flattened heat exchange tubes 36.
- the fins mounted to each of the plurality of heat exchanger tubes extend over the full length of the tubes, from the first header to the second header.
- the fins 50 of the heat exchanger 30 illustrated and described herein, however, are shorter than the tubes 36.
- the fins 50 are mounted near the center of each tube 36 such that at least one end 54 of each fin 50 is spaced away from the adjacent header 32, 34. As illustrated in FIG. 3, the first and second end 54a, 54b of each fin 50 may be spaced away the first and second header 32, 34, respectively.
- the distance between a first end 54a of the fins 50 and the first manifold 32 may, but need not be substantially identical to the distance between a second end 54b of the fins 50 and the second header 34.
- the distance between the ends 54 and the headers 32, 34 may be selected based on a variety of factors, including, but not limited to the type of refrigerant configured for use with the heat exchanger 30, the length of the manifolds 32, 34, and the temperature gradient between the headers 32, 34 and the fins 50, and the size and geometry of the plurality of heat exchanger tubes 36.
- the distance between the ends 54 and an adjacent manifold 32, 34 is generally between about five millimeters and about twenty five millimeters, and more specifically, about nineteen millimeters.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US201461985888P | 2014-04-29 | 2014-04-29 | |
PCT/US2015/028196 WO2015168234A1 (en) | 2014-04-29 | 2015-04-29 | Improved heat exchanger |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3137836A1 true EP3137836A1 (de) | 2017-03-08 |
EP3137836B1 EP3137836B1 (de) | 2019-06-12 |
Family
ID=53175654
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP15721968.4A Active EP3137836B1 (de) | 2014-04-29 | 2015-04-29 | Verbesserter wärmetauscher |
Country Status (5)
Country | Link |
---|---|
US (1) | US20170045299A1 (de) |
EP (1) | EP3137836B1 (de) |
CN (1) | CN106461295A (de) |
ES (1) | ES2742887T3 (de) |
WO (1) | WO2015168234A1 (de) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20180274817A1 (en) * | 2017-03-23 | 2018-09-27 | Edwards Vacuum Llc | Inline fluid heater |
EP3722720B1 (de) * | 2019-04-09 | 2023-05-10 | Pfannenberg GmbH | Wärmetauscheranordnung, verfahren zur herstellung einer wärmetauscheranordnung und verwendung einer wärmetauscheranordnung |
US11725833B2 (en) * | 2020-06-09 | 2023-08-15 | Goodman Global Group, Inc. | Heat exchanger for a heating, ventilation, and air-conditioning system |
Family Cites Families (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3228461A (en) * | 1964-04-22 | 1966-01-11 | Gen Motors Corp | Heat exchanger with header tanks |
FR2492963B1 (fr) * | 1980-10-23 | 1986-01-31 | Chausson Usines Sa | Echangeur de chaleur a tubes et ailettes et a plaques collectrices assemblees mecaniquement |
DE4031577A1 (de) * | 1990-10-05 | 1992-04-09 | Behr Gmbh & Co | Waermetauscher |
FR2740869B1 (fr) * | 1995-11-02 | 1997-12-19 | Valeo Thermique Moteur Sa | Echangeur de chaleur a tubes de section ovale ou oblongue et son procede d'assemblage |
DE19649129A1 (de) * | 1996-11-27 | 1998-05-28 | Behr Gmbh & Co | Flachrohr-Wärmeübertrager mit umgeformtem Flachrohrendabschnitt |
AU2003288747A1 (en) * | 2002-12-12 | 2004-06-30 | Showa Denko K.K. | Aluminum alloy brazing material, brazing member, brazed article and brazinh method therefor using said material, brazing heat exchanginh tube, heat exchanger and manufacturing method thereof using said brazing heat exchanging tube |
JP2005061685A (ja) * | 2003-08-08 | 2005-03-10 | Denso Corp | 熱交換器 |
US20050189096A1 (en) * | 2004-02-26 | 2005-09-01 | Wilson Michael J. | Compact radiator for an electronic device |
JP2007198623A (ja) * | 2006-01-24 | 2007-08-09 | Denso Corp | 熱交換器 |
JP4674602B2 (ja) * | 2007-11-22 | 2011-04-20 | 株式会社デンソー | 熱交換器 |
CN101634527B (zh) * | 2009-04-07 | 2013-02-20 | 三花控股集团有限公司 | 微通道换热器 |
CN201476625U (zh) * | 2009-06-15 | 2010-05-19 | 浙江康盛股份有限公司 | 微通道冷凝器 |
DE102009057175A1 (de) * | 2009-12-05 | 2011-06-09 | Volkswagen Ag | Wärmetauscher |
CN102192672A (zh) * | 2010-03-16 | 2011-09-21 | 乐金电子(天津)电器有限公司 | 扁管换热器结构及其装配方法 |
CN102278899A (zh) * | 2011-05-30 | 2011-12-14 | 广州迪森家用锅炉制造有限公司 | 用于燃气采暖热水炉的翅管式主换热器及其制造方法 |
US20130075069A1 (en) * | 2011-09-26 | 2013-03-28 | Trane International Inc. | Brazed microchannel heat exchanger with thermal expansion compensation |
US9677826B2 (en) * | 2013-12-20 | 2017-06-13 | Valeo, Inc. | Combo-cooler |
US20150300757A1 (en) * | 2014-04-17 | 2015-10-22 | Enterex America LLC | Heat exchanger tube insert |
US10082348B2 (en) * | 2014-09-23 | 2018-09-25 | Enterex America LLC | Heat exchanger tube-to-header sealing system |
-
2015
- 2015-04-29 US US15/306,601 patent/US20170045299A1/en not_active Abandoned
- 2015-04-29 ES ES15721968T patent/ES2742887T3/es active Active
- 2015-04-29 CN CN201580023223.2A patent/CN106461295A/zh active Pending
- 2015-04-29 EP EP15721968.4A patent/EP3137836B1/de active Active
- 2015-04-29 WO PCT/US2015/028196 patent/WO2015168234A1/en active Application Filing
Also Published As
Publication number | Publication date |
---|---|
WO2015168234A1 (en) | 2015-11-05 |
US20170045299A1 (en) | 2017-02-16 |
ES2742887T3 (es) | 2020-02-17 |
EP3137836B1 (de) | 2019-06-12 |
CN106461295A (zh) | 2017-02-22 |
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