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EP1439365A2 - Echangeur de chaleur - Google Patents

Echangeur de chaleur Download PDF

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Publication number
EP1439365A2
EP1439365A2 EP03024821A EP03024821A EP1439365A2 EP 1439365 A2 EP1439365 A2 EP 1439365A2 EP 03024821 A EP03024821 A EP 03024821A EP 03024821 A EP03024821 A EP 03024821A EP 1439365 A2 EP1439365 A2 EP 1439365A2
Authority
EP
European Patent Office
Prior art keywords
pipes
heat exchanger
header
passage
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.)
Withdrawn
Application number
EP03024821A
Other languages
German (de)
English (en)
Other versions
EP1439365A3 (fr
Inventor
Jang Seok Lee
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.)
LG Electronics Inc
Original Assignee
LG Electronics Inc
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 LG Electronics Inc filed Critical LG Electronics Inc
Publication of EP1439365A2 publication Critical patent/EP1439365A2/fr
Publication of EP1439365A3 publication Critical patent/EP1439365A3/fr
Withdrawn legal-status Critical Current

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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
    • F28F19/00—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers
    • F28F19/02—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers by using coatings, e.g. vitreous or enamel coatings
    • F28F19/04—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers by using coatings, e.g. vitreous or enamel coatings of rubber; of plastics material; of varnish
    • 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
    • F28F21/06—Constructions of heat-exchange apparatus characterised by the selection of particular materials of plastics material
    • F28F21/062—Constructions of heat-exchange apparatus characterised by the selection of particular materials of plastics material the heat-exchange apparatus employing tubular conduits
    • 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
    • F28D1/0478—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 the conduits having a non-circular cross-section
    • 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
    • F28D1/05316—Assemblies of conduits connected to common headers, e.g. core type radiators
    • F28D1/05341—Assemblies of conduits connected to common headers, e.g. core type radiators with multiple rows of conduits or with multi-channel conduits combined with a particular flow pattern, e.g. multi-row multi-stage radiators
    • 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
    • F28D1/05375—Assemblies of conduits connected to common headers, e.g. core type radiators with particular pattern of flow, e.g. change of flow direction
    • 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
    • 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
    • F28F9/0202—Header boxes having their inner space divided by partitions
    • F28F9/0204—Header boxes having their inner space divided by partitions for elongated header box, e.g. with transversal and longitudinal partitions

Definitions

  • the present invention relates generally to a heat exchanger, and more particularly to a heat exchanger, which improves an efficiency of heat exchange by optimizing shapes of a pipe and a header and forming a passage of coolant between fine tubes constituting the pipe.
  • these air conditioners achieve an air conditioning through a compression step of converting low temperature-low pressure gas coolant into high temperature-high pressure gas coolant, a condensation step of converting the high temperature-high-pressure gas coolant into intermediate temperature-high-pressure liquid coolant, an expansion step of converting the intermediate temperature-high pressure liquid coolant into low temperature-low pressure liquid coolant, and an evaporation step of converting the low temperature-low pressure liquid coolant into low temperature-low pressure gas coolant.
  • the compression step, the condensation step, the expansion step, and the evaporation steps are performed in a compressor, a condenser, an expansion value, and an evaporator, respectively.
  • an air conditioner is a cooler or heater depends on indoor or outdoor installation positions of the condenser and the evaporator of the devices. If the condenser is located in the indoor, the air conditioner is the heater. If the evaporator is located in the indoor, the air conditioner is the cooler.
  • the condenser and the evaporator are generally comprised of a heat exchanger.
  • the heat exchanger is an apparatus for directly or indirectly contacting two kinds of fluid having different temperatures each other such that heat is exchanged.
  • the heat exchanger is comprised of pipes in a zigzag form for heat exchange, pins located between the zigzag-formed pipes for increasing an efficiency of heat exchange, and a fan for supplying air for the zigzag-formed pipes.
  • the heat exchanger with the material of aluminum includes a fan for producing a flow of air, pipes in a plate bar shape for a passage of water, a header located at both ends of the pipes for forming a passage of water between the pipes, and a regulator plate inserted into the header for regulating the passage in the header.
  • a cylindrical or semi-cylindrical shape header is generally used as the header.
  • the cylindrical header is manufactured in such a manner that pipe insertion holes are formed at a constant interval and then the pipes are inserted and assembled into the pipe insertion holes.
  • the semi-cylindrical header which is separated into insertion portions into which the pipes are inserted and cover portions for covering the insertion portion, is manufactured in such a manner that the pipes are inserted into the pipe insertion holes formed on the insertion portions and then are engaged with the cover portion.
  • FIG. 1 shows a structure of a conventional heat exchanger.
  • the conventional heat exchanger includes a fan 10 for producing a flow of air by a force of rotation; a plurality of pipes 20 layered vertically by an appropriate number in which heat is exchanged due to the flow of air produced by the fan 10; a plurality of pins 30 formed by a plate folded repeatedly in order to increase the efficiency of heat exchange and adhered closely to the pipes 20 between the pipes; a header 40 located at both ends of the pipes 20 for forming a passage of water between the pipes; and a regulator plate 50 inserted into the header 40 for regulating the passage in the header.
  • the heat exchanger constructed as above accomplishes a heat exchange while the air produced by the fan 10 passes through the pipes provided with the pins.
  • an efficient heat exchange can be accomplished by inserting the regulator plate 50 into an appropriate position inside the header so that a coolant passage is formed in a vertical direction.
  • an object of the present invention is to provide a heat exchanger which is capable of accomplishing a more efficient heat exchange by forming a coolant passage between fine tubes constituting the pipes as well as between the pipes, as compared to the conventional approach by which the coolant passage is formed only between the pipes.
  • the present invention provides a heat exchanger comprising a plurality of pipes, each including a plurality of fine tubes; and a header to enable formation of a passage between fine tubes in the same pipe as well as between the pipes.
  • each of said plurality of pipes is made of a plastic material so that a plurality of fine tubes can be formed.
  • said header is made of a plastic material so that a regulator plate inside said header can be freely formed. Accordingly, it is possible to facilitate formation of a passage between fine tubes in the same pipe as well as between the pipes due to a free construction of the regulator plate into the header. Accordingly, there provides a benefit of an increase in an efficiency of heat exchange.
  • FIG. 2 is a schematic diagram showing a heat exchanger according to a preferred embodiment of the present invention.
  • the heat exchanger includes a fan 10 for producing a flow of air by a force of rotation; a plurality of pipes 20 layered vertically by an appropriate number in which heat is exchanged due to the flow of air produced by the fan 10; a plurality of pins 130 formed by a plate folded repeatedly in order to increase the efficiency of heat exchange and adhered closely to the pipes 20 between the pipes; a header 140 located at both ends of the pipes 20 for forming a passage between the fine tubes in the same pipe as well as between the pipes 20; and a regulator plate 150 inserted into the header 140 for regulating the passage in the header.
  • each of the pipes 20 is referred to as a micro-tube assuming a shape of rectangular parallelepiped and is comprised of a plurality of fine tubes.
  • the number of fine tubes is typically 9 or 10.
  • the reason for such a division of the fine tubes is that a partition for increasing durability is formed in the middle of pipe since aluminum is frail.
  • the pipes 20 of the material of aluminum is suitable to a small heat exchanger since a heat exchange efficiency is high and a less space is required, compared to a heat exchanger using typical cupper pipes.
  • pins 30 of the material of aluminum are adhered between the pipes 20 in order to increase the heat exchange efficiency more.
  • the header 140 is a member adhered to both ends of a group of pipes 20 which are multi-layered for forming a passage between the pipes by properly constructing the regulator plate 150 in a middle portion inside the header 140.
  • the regulator plate 150 can be freely constructed by manufacturing the header 140 employing a material of plastic through a plastic heat-melting.
  • the header used the same material of aluminum as the pipe and so the regulator plate was mounted such that only a passage between the pipes could be defined due to a problem of welding between metals, formation of a passage could not be optimized.
  • the regulator plate of the material of plastic is constructed, an optimal passage formation is possible.
  • the header is partitioned into A, B, C and D by the regulator plate.
  • the regulator plate mounted in only a horizontal direction in the past is also mounted in a vertical direction to enable formation of a passage with a precise capacity.
  • the passage is configured such that the coolant is flown in order of A, B, C and D, and, during this procedure, is flown into passages formed by fine tubes in the same pipe.
  • FIG. 3 is a schematic diagram showing a heat exchanger according to an another preferred embodiment of the present invention.
  • the heat exchanger includes a fan 10 for producing a flow of air by a force of rotation; a plurality of pipes 120, each including a plurality of fine tubes, layered vertically by an appropriate number in which heat is exchanged due to the flow of air produced by the fan 10; a header 140 located at both ends of the pipes 120 for forming a passage between the fine tubes in the same pipe as well as between the pipes 120; and a regulator plate 150 inserted into the header 140 for regulating the passage in the header.
  • the header 140 is the same as the header of FIG. 2, but the pipes 120 are changed differently from the pipes of FIG. 2.
  • the pipes 120 made of the material of plastic are different in structure from conventional aluminum pipes, considering the material of plastic.
  • pins of material of plastic there is no pin in this embodiment.
  • the reason for this is that the provision of a pin of material of plastic has no meaning due to a low heat transfer capability of the material of plastic while pins of material of aluminum can transfer heat to pipes to which the pins are adhered due to a high heat transfer capability of the material of aluminum.
  • diameters of the fine tubes of the material of plastic are very smaller than those of the fine tubes of the material of aluminum. Accordingly, a number of fine tubes constitute one pipe.
  • FIG. 4 is a state diagram showing a comparison in heat exchange performance between the heat exchanger using the header and pipes of the plastic material described as above and the conventional heat exchanger using the header and pipes of the aluminum material. It can be seen from the state diagram that a heat exchange performance is improved by about 20-30% in an interval of a typically applied air flow 0.5-0.8.
  • a unit in the left of the state diagram represents a total heat transfer coefficient.
  • the multiplication of the total heat transfer coefficient and a temperature difference is a heat capacity, i.e., a heat exchange capacity.
  • the temperature difference means a difference between a temperature of coolant introduced into the heat exchanger and a temperature of coolant for cooling air.
  • the header in the heat exchanger is made of the material of plastic so that the regulator plate to define a passage of pipe can be formed freely. Also, not only a passage between the pipes but also a passage between the fine tubes in the same pipe can be formed. Accordingly, formation of a passage to accomplish maximal heat exchange efficiency is possible.
  • the heat exchange performance is improved by forming a more number of fine tubes having a less small diameter, compared to the pipes of the material of aluminum, using the pipes of the material of plastic.
  • the heat exchanger according to the present invention constructed as above can accomplish the improvement of heat exchange performance by the maximum of 30% over the heat exchanger of the material of aluminum.

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  • 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)
EP03024821A 2003-01-15 2003-10-31 Echangeur de chaleur Withdrawn EP1439365A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR2003002700 2003-01-15
KR1020030002700A KR20040065626A (ko) 2003-01-15 2003-01-15 열 교환기

Publications (2)

Publication Number Publication Date
EP1439365A2 true EP1439365A2 (fr) 2004-07-21
EP1439365A3 EP1439365A3 (fr) 2005-11-02

Family

ID=32588956

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03024821A Withdrawn EP1439365A3 (fr) 2003-01-15 2003-10-31 Echangeur de chaleur

Country Status (6)

Country Link
US (1) US20040188076A1 (fr)
EP (1) EP1439365A3 (fr)
JP (1) JP2004219052A (fr)
KR (1) KR20040065626A (fr)
CN (1) CN1517660A (fr)
AU (1) AU2003261553A1 (fr)

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EP2341301A3 (fr) * 2006-04-04 2011-10-05 Efficient Energy GmbH Pompe à chaleur
US9222483B2 (en) 2006-04-04 2015-12-29 Efficient Energy Gmbh Heat pump
US10337746B2 (en) 2006-04-04 2019-07-02 Efficient Energy Gmbh Heat pump
WO2010037165A1 (fr) * 2008-09-30 2010-04-08 Muller Industries Australia Pty Ltd Système de refroidissement comprenant un échangeur de chaleur à micro-canaux
WO2010037164A1 (fr) * 2008-09-30 2010-04-08 Muller Industries Australia Pty Ltd Système modulaire de refroidissement
AU2009299104B2 (en) * 2008-09-30 2011-11-24 Baltimore Aircoil Company Inc. Cooling system with microchannel heat exchanger
AU2009299103B2 (en) * 2008-09-30 2012-02-02 Baltimore Aircoil Company Inc. Modular cooling system

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KR20040065626A (ko) 2004-07-23
AU2003261553A1 (en) 2004-08-05
JP2004219052A (ja) 2004-08-05
US20040188076A1 (en) 2004-09-30
EP1439365A3 (fr) 2005-11-02
CN1517660A (zh) 2004-08-04

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