US20130098591A1 - Aluminum fin and tube heat exchanger - Google Patents

Aluminum fin and tube heat exchanger Download PDF

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Publication number
US20130098591A1
US20130098591A1 US13/704,723 US201113704723A US2013098591A1 US 20130098591 A1 US20130098591 A1 US 20130098591A1 US 201113704723 A US201113704723 A US 201113704723A US 2013098591 A1 US2013098591 A1 US 2013098591A1
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US
United States
Prior art keywords
tube
aluminum alloy
heat exchanger
recited
galvanic potential
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.)
Abandoned
Application number
US13/704,723
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English (en)
Inventor
Michael F. Taras
Jason Scarcella
Bruce J. Poplawski
Jack L. Esformes
Mary T. Lombardo
Thomas J. Garosshen
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Carrier Corp
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Carrier Corp
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Publication date
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Priority to US13/704,723 priority Critical patent/US20130098591A1/en
Assigned to CARRIER CORPORATION reassignment CARRIER CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: GAROSSHEN, THOMAS J., LOMBARDO, MARY T., ESFORMES, JACK L., POPLAWSKI, BRUCE J., SCARCELLA, JASON, TARAS, MICHAEL F.
Publication of US20130098591A1 publication Critical patent/US20130098591A1/en
Abandoned legal-status Critical Current

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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
    • 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
    • F28D1/047—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 bent, e.g. in a serpentine or zig-zag
    • F28D1/0477—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 bent, e.g. in a serpentine or zig-zag the conduits being bent in a serpentine or zig-zag
    • 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
    • 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
    • F28F1/24—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 and extending transversely
    • F28F1/32—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 and extending transversely the means having portions engaging further tubular elements
    • 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
    • F28F1/24—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 and extending transversely
    • F28F1/32—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 and extending transversely the means having portions engaging further tubular elements
    • F28F1/325—Fins with openings
    • 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
    • F28F1/40—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only inside 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
    • F28F19/00—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers
    • F28F19/004—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers by using protective electric currents, voltages, cathodes, anodes, electric short-circuits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F21/00—Constructions of heat-exchange apparatus characterised by the selection of particular materials
    • F28F21/08—Constructions of heat-exchange apparatus characterised by the selection of particular materials of metal
    • F28F21/081—Heat exchange elements made from metals or metal alloys
    • F28F21/084—Heat exchange elements made from metals or metal alloys from aluminium or aluminium alloys
    • 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
    • F28D2021/0085—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
    • F28F2275/00—Fastening; Joining
    • F28F2275/12—Fastening; Joining by methods involving deformation of the elements
    • F28F2275/125—Fastening; Joining by methods involving deformation of the elements by bringing elements together and expanding

Definitions

  • This invention relates generally to fin and tube heat exchangers and, more particularly, to a corrosion resistant, all aluminum alloy fin and tube evaporator heat exchanger particularly suitable for use in connection with transport refrigeration units.
  • Perishable cargo such as fresh produce, fresh and frozen meat, poultry, seafood and other foods
  • Containers of this type are typically designed to accommodate transport by road on trailers, by sea on container ships, by rail on flat-bed train cars and even by air in cargo planes.
  • the truck, trailer or container transporting the perishable cargo is equipped with a refrigeration unit for maintaining the cargo box at a temperature within a specified temperature range to maintain freshness and minimize spoilage during transit.
  • the refrigeration unit is mounted to one wall, typically the front wall, of the cargo box of the truck, trailer or container.
  • the refrigeration unit includes a compressor and a condenser unit isolated from the cargo box, and an evaporator unit including a tubular heat exchanger, commonly a tube and fin heat exchanger, operatively associated with the cargo box of the truck, trailer, or the container. Air drawn from the cargo box is passed over the evaporator heat exchanger in heat exchange relationship with refrigerant circulating through the tubes of the heat exchanger whereby the air is cooled prior to being supplied back to the cargo box.
  • a tubular heat exchanger commonly a tube and fin heat exchanger
  • Aluminum tubes are commercially available, but are not currently used in transport refrigeration applications due to a number of factors, including not only concern over corrosion in transport refrigeration applications, and the reduced tensile strength of aluminum versus copper and thicker wall required for the identical burst strength, but also due to the increased thermal expansion of aluminum versus copper, the brazing sensitivity for Al/Al joints due to challenging geometries and Al alloy melting temperature being very close to the braze alloy melting temperature, and the susceptibility of aluminum to fatigue and fretting due to high vibration levels.
  • a heat exchanger having an all aluminum alloy construction i.e. a heat exchanger having aluminum alloy tubes, aluminum alloy fins and aluminum alloy tube sheets, that has acceptable corrosion resistance for use in transport refrigeration applications, lower weight and substantially the same heat transfer performance as conventional copper tube and aluminum fin heat exchangers used in transport refrigeration units.
  • a heat exchanger includes at least one tube having a longitudinally extending tube length and a plurality of heat exchange fins arrayed on the at least one tube.
  • the at least one tube is made of a first aluminum alloy having a first galvanic potential and the plurality of heat exchange fins are made of a second aluminum alloy having a second galvanic potential.
  • the second galvanic potential is higher than the first galvanic potential whereby the fins are sacrificial with respect to the tube.
  • the difference in galvanic potential between the second aluminum alloy and the first aluminum alloy is greater than about 20 millivolts.
  • a heat exchanger in an aspect, includes at least one serpentine tube having a plurality of longitudinally extending tube lengths and a plurality of heat exchange fins arrayed on the at least one tube. Adjacent fins of the arrayed plurality of heat exchange fins have interlocking collars disposed about and contacting the at least one tube. The interlocking collars collectively form a protective layer about the at least one tube.
  • the fins may be made of an aluminum alloy having a greater galvanic potential relative to the tube in contact therewith whereby the protective layer becomes a galvanically sacrificial layer relative to the tube.
  • FIG. 1 is a perspective view, partly exploded, illustrating a single bank of a fin and tube heat exchanger
  • FIG. 2 is a perspective view of the return bend end of the assembled heat exchanger of FIG. 1 ;
  • FIG. 3 is an elevation view in section of the fin and tube interface of an exemplary embodiment of an aluminum tube and aluminum fin heat exchanger in accordance with the disclosure herein;
  • FIG. 4 is a sectional view through an internally grooved aluminum tube of a embodiment of the heat exchanger disclosed herein;
  • FIG. 5 is a cross-section view of the internally grooved tube taken substantially along line 5 - 5 of FIG. 4 ;
  • FIG. 6 is an elevation view of an enlarged section of the internally grooved tube of FIG. 5 .
  • FIGS. 1 and 2 of the drawing there is depicted an exemplary embodiment of a round tube and plate heat exchanger 10 of the general type commonly used as an evaporator in transport refrigeration systems showing one serpentine tube bank 12 .
  • the typical heat exchanger 10 will have a plurality of serpentine tube banks 12 disposed in laterally spaced relationship, for example, as depicted in FIG. 2 .
  • the serpentine tube 12 is formed of a plurality of hairpin tube sections 14 connected in fluid flow communication by return bends 16 .
  • Each hairpin tube section 14 has a pair of generally parallel longitudinally extending tube lengths 18 and a hairpin U-bend 20 .
  • Tube sheets 22 and 24 which are disposed in spaced relationship at opposite ends of the longitudinally extending tube lengths 18 , are penetrated by each tube length 18 of the plurality of tube banks 12 and provide structural support for the tube banks. It is to be understood that two straight tube sections connected by a return bend 16 can substitute for a single hairpin tube section 14 . Further, one or more intermediate tube sheets may be incorporated in the heat exchanger 10 .
  • the heat exchanger 10 includes a plurality of fins 26 disposed in parallel spaced relationship and extending transversely to the longitudinally extending tube lengths 18 .
  • Each fin 26 comprises a sheet-like plate fin having an array of openings therein, each opening for accommodating a tube length 18 penetrating therethrough when the heat exchanger 10 is assembled.
  • To assemble the heat exchanger 10 each fin 26 of the plurality of sheet-like plate fins is slid over the array of tube lengths 18 , one after another, with each opening in each fin 26 receiving a corresponding one of the tube lengths 18 , until all the fins 26 are assembled on the plurality of tube lengths 18 .
  • the tube lengths 18 are then expanded radially outward from within the tube lengths 18 whereby the outer wall of each of the tube lengths 18 is brought into a forced fit contact with each of the collar portions 28 surrounding the openings in each of the fins 26 .
  • the fin pack When the array of fins 26 , commonly referred to as the fin pack, is assembled onto the tube lengths 18 , the fin pack extends between the spaced tube sheets 22 and 24 and over substantially the full length of the tube lengths 18 .
  • the spacing between the fins within the fin pack is generally defined by the fin collar portions 28 .
  • the fins 26 may have thermal performance enhancement features such as corrugations, waves, slits, louvers or the like.
  • the collar portions 28 have a flare 30 projecting outwardly from a first edge of the fin and a recess 32 provided in the opposite edge of the fin.
  • the fin collar portions 28 nest with the flare 30 of one fin received in the recess 32 of the adjacent fin.
  • the fin collar portions 28 are crushed thereby interlocking the flares 30 with the associated recesses 32 .
  • any spaces or gaps that may have existed between adjacent interlocking fins 26 in the assembled fin pack array are eliminated and an integral layer is formed about the outer wall of the tube lengths 18 .
  • the tubes 12 including the hairpin tube sections 14 and return bends 16 , the tube sheets 22 , 24 and the fins 26 are all made of aluminum alloys.
  • the tubes 12 are made of a first aluminum alloy
  • the tube sheets 22 , 24 are made of a second aluminum alloy
  • fins 26 are made of a third aluminum alloy, with the second and third aluminum alloys having a higher galvanic potential relative to the first aluminum alloy.
  • the second and third aluminum alloys are galvanically sacrificial to the first aluminum alloy. Therefore, the aluminum alloy tube sheets 22 , 24 and the aluminum alloy fins 26 are galvanically sacrificial to the aluminum alloy tubes 12 .
  • the selection of the tube alloy, that is the first aluminum alloy, and fin alloy, that is the third aluminum alloy, combination is critical to providing adequate long-term corrosion resistance to the aluminum heat exchanger 10 .
  • the fin alloy must be galvanically sacrificial to the tube under the environmental conditions of operation. Generally, the galvanic potential difference between the third aluminum alloy, i.e. the fin alloy, and the first aluminum alloy, i.e. the tube alloy, is greater than about 20 millivolts. Additionally the third aluminum alloy, i.e. the fin alloy, should exhibit low corrosion rates under the environmental conditions of operation.
  • Examples of good fin alloy and tube alloy combinations for an evaporator heat exchanger for transport refrigeration applications include: a tube made of AA3003 aluminum alloy with fins made of AA1100 or AA7072 aluminum alloy, a tube made of AA30048 aluminum alloy and a fin made of AA7072 aluminum alloy, and a tube made of AA3102 aluminum alloy and a fin made of AA7072 aluminum alloy.
  • the aluminum alloy specifications are those of the Aluminum Association standards. Using such combinations, the interlocking aluminum fins 26 form a covering layer that is sacrificial to the underlying aluminum hairpin tubes 14 that provides added corrosion resistance in the fin pack area.
  • the tube sheets 22 , 224 should also be sacrificial relative to the hairpin tubes 14 passing therethrough.
  • the second aluminum alloy of which the tube sheets 22 , 24 are formed should have a significant galvanic potential difference, generally also greater than about 20 millivolts, relative to the first aluminum alloy of which the hairpin tubes 14 are formed.
  • Examples of good tube alloy and tube sheet alloy combinations for an evaporator heat exchanger for transport refrigeration applications include: tubes made of AA3003 aluminum alloy with tube sheets made of AA.5052 aluminum alloy, tubes made of AA30048 aluminum alloy with tube sheets made of AA7072 aluminum alloy, and tubes made of AA3102 aluminum alloy with tube sheets made of AA7072 aluminum alloy.
  • Tube-to-tube sheet interference can be a problem if adequate clearance is not provided to avoid long-term tube damage due to fretting. Tube-to-tube sheet clearance must be maintained from the thermal stress standpoint but minimized from vibration related considerations.
  • the clearance, Ts as measured in a radial direction as indicated in FIG. 5 , between the openings in the tube sheet 22 , 24 through which a round tube 14 , having an outer diameter D, passes may be selected such that the dimensionless ratio Ts/D has a value lying in the range of 0.0013 to 0.0363.
  • the return bends 16 and the hairpin turns 20 of the hairpin tubes 14 are disposed outside of the fin pack area and therefore these portions of the serpentine tube 12 are not protected by the sacrificial layer provided by the interlocking fins 26 .
  • Coating protection may be applied to the return bends 16 and the hairpin turns 20 of the hairpin tubes 14 to provide corrosion resistance for the hairpin turns 20 and return bends 16 equivalent to the heat exchanger fin pack area design life.
  • protective coatings can be applied to the tube sheet ends so as to coat the hairpin turns 20 and the return bends 16 .
  • Acceptable protective coatings include, for example, but are not limited to, clear acrylic based solvent varnish, urethane based varnish, conversion coats, acrylic e-coats, epoxy e-coats, corrosion inhibitive e-coats, polyester powder, powder coats and pre-treated 2-part epoxies can be applied, depending on the level of protection desired.
  • a protective coating may be applied to the entire heat exchanger 10 to provide added corrosion resistance under severe environment exposure conditions that may be encountered in some transport refrigeration applications.
  • protective coatings that may be applied to the entire heat exchanger 10 include, but are not limited to, trivalent chrome conversion coats, zirconium conversion coats, zinc phosphate coats and iron phosphate coats. Additionally, any of the previously mention coatings for the application to the hairpin turns 20 and return bends 16 may be applied to the entire heat exchanger 10 as a pre-treatment followed by an overcoat application of the aforementioned coats.
  • Aluminum round tube and aluminum plate fin heat exchanger coils can replace heat exchanger coils of a similar construction with copper round tubes and aluminum fins while achieving equivalent thermal performance over a wide range of environmental conditions and operating parameters.
  • Aluminum tubes need to have a thicker wall due to the reduced tensile strength of aluminum alloys compared to their copper counterparts.
  • Aluminum tubes used in heat exchanger applications may be internally grooved or otherwise provided with internal fin enhancements such as illustrated in the exemplary embodiment of the tube 14 depicted in FIGS. 4-6 .
  • FIGS. 4-6 Range Tube Wall/Tube OD (structural) (p ⁇ h)/D 0.047-0.086 Fin Height/Tube OD (structural & performance) h/D 0.0042- 0.0429 Fin Height/Fin Bas (structural & performance) h/a 0.115-1.333 Fin Tip & Base/Tube OD (structural) (a + k)/D 0.04-0.08 Fin Base/Fin Spacing (structural & performance) a/b 0.65-0.90 Fin Base to Tip Difference/Fn Tip (structural & a/k ⁇ 1 0.6-2.0 performance) Fin Base to Tip Difference/Fin Height (a ⁇ k)/h 0.25-0.35
  • the ratio of the fin perimeter to fin cross section for the internal fin enhancements may have a value in the range of 400 to 650 (as expressed in inch ⁇ 1 dimension). With reference to FIG. 6 , the fin perimeter/fin cross section ratio is

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  • 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)
US13/704,723 2010-07-26 2011-07-21 Aluminum fin and tube heat exchanger Abandoned US20130098591A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US13/704,723 US20130098591A1 (en) 2010-07-26 2011-07-21 Aluminum fin and tube heat exchanger

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US36768810P 2010-07-26 2010-07-26
US36807510P 2010-07-27 2010-07-27
PCT/US2011/044788 WO2012018536A2 (en) 2010-07-26 2011-07-21 Aluminum fin and tube heat exchanger
US13/704,723 US20130098591A1 (en) 2010-07-26 2011-07-21 Aluminum fin and tube heat exchanger

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US20130098591A1 true US20130098591A1 (en) 2013-04-25

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US (1) US20130098591A1 (da)
EP (1) EP2598821B1 (da)
CN (1) CN103003654B (da)
DK (1) DK2598821T3 (da)
ES (1) ES2744883T3 (da)
SG (1) SG187560A1 (da)
WO (1) WO2012018536A2 (da)

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US20140033534A1 (en) * 2011-04-25 2014-02-06 Douglas C. Wintersteen Method of making a heat exchanger with an enhance material system
JP2015117873A (ja) * 2013-12-18 2015-06-25 日本軽金属株式会社 フィン・アンド・チューブ型熱交換器及びその製造方法
US20150219405A1 (en) * 2014-02-05 2015-08-06 Lennox Industries Inc. Cladded brazed alloy tube for system components
JP2016136076A (ja) * 2015-01-23 2016-07-28 株式会社Ａｆｒｅｘ 熱交換器及びその製造方法
US20170115066A1 (en) * 2015-10-23 2017-04-27 Hyfra Industriekuhlanlagen Gmbh System for cooling a fluid with a microchannel evaporator
US20170115067A1 (en) * 2015-10-23 2017-04-27 Hyfra Industriekuhlanlagen Gmbh Method and system for cooling a fluid with a microchannel evaporator
DE102017210196A1 (de) * 2017-06-19 2018-12-20 Mahle International Gmbh Wärmeübertrager mit mindestens zwei miteinander verklebten und/oder miteinan-der mechanisch gefügten Bauteilen
JP2020070933A (ja) * 2018-10-29 2020-05-07 ダイキン工業株式会社 熱交換器のフィンとその製造方法、熱交換器、空気調和装置
JP2020112347A (ja) * 2020-04-01 2020-07-27 ダイキン工業株式会社 熱交換器のフィン、および熱交換器
US20210348859A1 (en) * 2018-12-19 2021-11-11 Carrier Corporation Heat exchanger with aluminum alloy clad tube and method of manufacture
US11226139B2 (en) 2019-04-09 2022-01-18 Hyfra Industriekuhlanlagen Gmbh Reversible flow evaporator system
US11274887B2 (en) 2018-12-19 2022-03-15 Carrier Corporation Aluminum heat exchanger with fin arrangement for sacrificial corrosion protection
US20220099355A1 (en) * 2020-09-27 2022-03-31 Guangzhou University Heat exchanger capable of automatically defrosting or deicing
US20220183495A1 (en) * 2015-09-17 2022-06-16 Lutron Technology Company Llc Mounting bracket lock

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CN104169468B (zh) * 2012-03-15 2017-03-08 开利公司 用于铝热交换器的多层保护性涂层
CN104204711B (zh) * 2012-04-12 2018-11-06 开利公司 用于铝热交换器的失效模式保护的牺牲铝翅片
CN104220835B (zh) * 2012-04-12 2018-09-04 开利公司 铝合金管翅式热交换器
FR2999696B1 (fr) * 2012-12-18 2018-09-14 Valeo Systemes Thermiques Tube plat pour echangeur de chaleur d'air de suralimentation et echangeur de chaleur d'air de suralimentation correspondant.
US20150377563A1 (en) * 2013-02-21 2015-12-31 Carrier Corporation Tube structures for heat exchanger
EP2962057B1 (en) 2013-03-01 2020-11-11 Carrier Corporation Aluminum heat exchanger with corrosion resistant coating
CN104215115B (zh) * 2014-08-18 2016-06-08 珠海格力电器科技有限公司 表冷器翅片及其制备工艺
JP6611528B2 (ja) * 2015-09-09 2019-11-27 日立ジョンソンコントロールズ空調株式会社 空気調和機およびその製造方法
CN106885481B (zh) * 2016-05-24 2019-03-19 无锡市金城环保炊具设备有限公司 一种烟道口带热烟气余热高效回收利用的技术方法
GB201616495D0 (en) * 2016-09-28 2016-11-09 Electronica Products Limited Liquid cooled heatsink

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DK2598821T3 (da) 2019-10-07
WO2012018536A2 (en) 2012-02-09
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WO2012018536A3 (en) 2012-08-02

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