EP2554937A1 - Echangeur de chaleur - Google Patents

Echangeur de chaleur Download PDF

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Publication number
EP2554937A1
EP2554937A1 EP10848826A EP10848826A EP2554937A1 EP 2554937 A1 EP2554937 A1 EP 2554937A1 EP 10848826 A EP10848826 A EP 10848826A EP 10848826 A EP10848826 A EP 10848826A EP 2554937 A1 EP2554937 A1 EP 2554937A1
Authority
EP
European Patent Office
Prior art keywords
heat exchanger
water absorption
absorption sheet
sheet substrate
antibacterial
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Withdrawn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
EP10848826A
Other languages
German (de)
English (en)
Inventor
Tomohisa Imafuji
Hisae Murata
Yoshihito Yokota
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.)
Sanden Corp
Original Assignee
Sanden Corp
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 Sanden Corp filed Critical Sanden Corp
Publication of EP2554937A1 publication Critical patent/EP2554937A1/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Withdrawn legal-status Critical Current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
    • F28F19/002—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers by using inserts or attachments
    • 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
    • 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
    • F25B39/02—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
    • F28F2265/00—Safety or protection arrangements; Arrangements for preventing malfunction
    • F28F2265/20—Safety or protection arrangements; Arrangements for preventing malfunction for preventing development of microorganisms

Definitions

  • the present invention relates to a heat exchanger, and specifically relates to a heat exchanger in which an antibacterial member can be installed at a low cost without using a dedicated fixing member, a decline of heat exchange efficiency caused by the installation of the antibacterial member is kept to a minimum even if it occurs, and flexibility of design can be kept at a high level.
  • a heat exchanger especially in a heat exchanger such as an evaporator provided in an air path in an air-conditioning system, a variety of methods for preventing generation of bacteria and fungi have been suggested hitherto.
  • a heat exchanger is disclosed that an antibacterial member impregnated with an antibacterial fungicide agent is placed at an upper end thereof, the antibacterial ingredient is dissolved in water dew generated on a surface of the antibacterial member, and antibacterial functionality is provided by the water dew which contains the antibacterial ingredient and flows down on the surface of the heat exchanger.
  • an object of the present invention is to provide a heat exchanger in which an antibacterial member can be installed at a low cost without using a dedicated fixing member, a decline of heat exchange efficiency caused by the installation of the antibacterial member is kept to a minimum even if it occurs, and flexibility of design can be kept at a high level comparable to conventional ones in which an antibacterial member is not installed.
  • a heat exchanger is a heat exchanger provided with a heat radiation member containing at least a plurality of tubes which are arranged in a planar manner and through which a heat exchange medium flows, characterized in that a water absorption sheet substrate holding an antibacterial ingredient is partially attached to the heat radiation member so that the antibacterial ingredient can diffuse along a surface of the heat radiation member through water which has been absorbed by the water absorption sheet substrate.
  • a water absorption sheet substrate which is capable of absorbing and releasing water is used as a member holding an antibacterial ingredient, water can be released out of the sheet quickly after the antibacterial ingredient is dissolved in water which is absorbed temporarily, and the antibacterial ingredient rapidly diffuses over a wide range along the surface of the heat radiation member. Further, because the water containing the antibacterial ingredient is released successively after the antibacterial ingredient is dissolved in the water being absorbed in the water absorption sheet substrate due to the ease in releasing water, the water absorption sheet substrate does not have to be configured as a wide member having a great capability of keeping water and may be placed partially at a position in which heat exchange performance is not affected. Therefore, a decline of heat exchange efficiency of the heat exchanger itself is prevented, or is kept to a minimum even if it exists.
  • the diffusion of the antibacterial ingredient can be realized in various embodiment.
  • a filmy aqueous layer is formed on the surface of the heat radiation member, and part of the aqueous layer comes in contact with the water absorption sheet substrate, the antibacterial ingredient becomes dissolved and diffuses in the aqueous layer, and the antibacterial ingredient has an effect on the entire aqueous layer.
  • a water flow path is formed on the surface of the heat radiation member, by placing the water absorption sheet substrate in the upstream, water in which the antibacterial ingredient is dissolved flows in the flow path formed on the surface of the heat radiation member, and the diffusion of the antibacterial ingredient on the surface of the heat radiation member is achieved.
  • the above-described water current flowing in the flow path may be a continuous water current or a discrete water current (for example, drops which dribbles down the surface of the heat radiation member intermittently, etc.).
  • the water absorption sheet substrate can realize the diffusion of antibacterial ingredient in various means as described above, it is possible to choose an setting method appropriate to the use of the heat exchanger. Further, because it is formed in a sheet shape, the setting space can be kept small, a processing of size and shape matching with the setting location is easy, the flexibility of design of the heat exchanger can be kept at a high level as in the conventional case of having no antibacterial member, and a rise in manufacturing cost and an effect on peripheral equipments of the heat exchanger which are caused by the installation of the water absorption sheet substrate is suppressed.
  • condensation water condensed on the surface of the heat radiation member can be used as water for diffusing antibacterial ingredient, although it is not particularly limited.
  • the flow path of the condensation water to diffuse antibacterial ingredient it becomes unnecessary to form a new path for diffusing antibacterial ingredient and a rise in manufacturing cost of the heat exchanger is suppressed.
  • the water absorption sheet substrate is not limited about a setting embodiment specifically.
  • the water absorption sheet substrate may be fixed on the surface of the tube array by adhesion or fastening, or a fixing member may be used for fastening the substrate onto the surface of the tube array.
  • a fixing member may be used for fastening the substrate onto the surface of the tube array.
  • the water absorption sheet substrate is attached to the surface of the tube array non-adhesively without any additional dedicated fixing member.
  • such a setting embodiment is exemplified by a layout wherein an water absorption sheet substrate is placed between an insulation seal member and tubes in a heat exchanger, in which the insulation seal member is provided around an end part of the surface of the tube array.
  • the heat radiation member according to the present invention is not limited to the above-described tubes and, for example, an end plate provided at an end part of the tubes in the tube array direction, a header connected with the ends of tubes, fins provided among the tubes, etc. can be included in the heat exchanger.
  • a heat radiation member other than the tubes as mentioned above, it is also preferred that the water absorption sheet substrate is attached to the heat radiation member without any additional dedicated fixing member non-adhesively.
  • such a setting embodiment is exemplified by a layout wherein an water absorption sheet substrate is placed between a seal member and an end plate in a heat exchanger, in which the end plate as a heat radiation member is placed at an end part of tubes in a tube array direction and the seal member is placed on at least part of the surface of the end plate.
  • a position where the water absorption sheet substrate is installed is not limited specifically.
  • the antibacterial ingredient can diffuse in an upward direction through aqueous layer formed on the surface of the tubes as mentioned above.
  • the water absorption sheet substrate can be placed at an upper end part of the heat exchanger so that a flow path of moisture formed on the surface of the tubes can be used as a diffusion path of the antibacterial ingredient as mentioned above.
  • a material of water absorption sheet substrate according to the present invention comprises a nonwoven fabric or a mesh, although is not limited specifically.
  • the above-described water absorption sheet substrate may have a configuration that at least 2 water absorption sheet members are stacked, and that an antibacterial sheet holding antibacterial ingredient is located between the stacked water absorption sheet members. Because such a configuration can be constituted merely by the water absorption sheet members and the antibacterial sheet, the costs of manufacturing, processing and components of the water absorption sheet substrate can be reduced.
  • an inorganic antibacterial ingredient, an organic antibacterial ingredient, a natural antibacterial ingredient, etc. can be cited as the antibacterial ingredient according to the present invention, for example, although it is not limited specifically.
  • the above-described inorganic antibacterial ingredient can be exemplified by a metal ion such as Ag, Cu, Zn, Ti, a compound consisting of the metal ion, etc., although it is not limited specifically.
  • a metal ion such as Ag, Cu, Zn, Ti
  • a compound consisting of the metal ion, etc. although it is not limited specifically.
  • organic antibacterial ingredient can be exemplified by pyridione, thiabendazole, etc., although it is not limited specifically.
  • Such an organic antibacterial ingredient which can be synthesized chemically is inexpensive and makes it possible to reduce the manufacturing cost of the water absorption sheet substrate.
  • the above-described natural antibacterial ingredient can be exemplified by catechin, chitosan, allyl isothiocyanate, ozone, etc., although it is not limited specifically.
  • a natural antibacterial ingredient has little effect on human body and environment, and makes it possible to provide a water absorption sheet substrate which puts little load on the environment.
  • a method for keeping hold of ozone can be exemplified by a method of holding ozone by making water absorption sheet substrate absorb ozone-dissolving water, for example.
  • this heat exchanger is preferably applicable to an evaporator which is provided in a refrigeration circuit and in which water dew forms on a surface of tubes, and is especially suitable for an evaporator provided in a refrigeration circuit for automobile air-conditioning systems where the installation space is strictly limited and high flexibility of design is required.
  • a heat exchanger in the present invention a heat exchanger which is capable of antibacterial function can be realized at a low cost while maintaining flexibility of design.
  • Fig. 1 depicts an appearance of a heat exchanger according to an embodiment of the present invention, and specifically, depicts a structure that a water absorption sheet substrate intervenes between an insulation seal member and a tube non-adhesively in a heat exchanger provided with an insulation seal member placed at a position close to an end part of a surface of a tube array.
  • the water absorption sheet substrate is provided at a lower end part of the heat exchanger in Fig. 1 (A) and at an upper end part of the heat exchanger in Fig. 1 (B) , respectively.
  • heat exchanger 1 is provided with a plurality of tubes 2 which are arrayed in planar form and through which a heat exchange medium flows, and two headers 3 to which the ends of the tubes are connected. Inlet 4 and outlet 5 of the heat exchange medium are provided at an end of header 3.
  • Insulation seal member 6 is provided at a position close to an end part of the array surface of tubes 2 and at a position on the surface of header 3.
  • Water absorption sheet substrate 7 intervenes between insulation seal member 6 and tubes 2 non-adhesively.
  • Fig. 2 depicts an appearance of a heat exchanger according to an embodiment of the present invention, and specifically, depicts a structure that a water absorption sheet substrate intervenes between an insulation seal member and a tube non-adhesively in a heat exchanger provided with an insulation seal member placed at a position close to an end part of a surface of a tube array.
  • water absorption sheet substrate 7a, 7b and 7c are placed between insulation seal member 6a provided at the lower part of heat exchanger 1 and the lower end part of tube 2, between insulation seal member 6b provided at the upper part of heat exchanger 1 and the upper end part of tube 2, and between seal substrate 12 and end plate 11, respectively and non-adhesively.
  • water absorption sheet substrate 7 can be partially attached to each of heat radiation members so that antimicrobial activity to those heat radiation members can be provided. As mentioned above, because water absorption sheet substrate 7 can be easily processed into suitable size and shape for the installation space and is space-saving, water absorption sheet substrate 7 can be provided at a plurality of positions as keeping flexibility of design of heat exchanger 1 at high level, and a rise in the cost of manufacturing and an effect on peripheral equipments of heat exchanger 1 caused by the installation of water absorption sheet substrate 7 are kept to a minimum.
  • Fig. 3 depicts a diagrammatic vertical cross-sectional view around a lower end part of tubes of the heat exchanger shown in Fig. 1 (A) and depicts, in particular, states of a heat exchanger provided as an evaporator in a refrigeration circuit.
  • insulation seal member 6 is provided around a lower end part of tubes 2 and water absorption sheet substrate 7 is located between tubes 2 and insulation seal member 6.
  • heat exchanger 1 as an evaporator operates, tubes 2 are cooled by heat of evaporation of a refrigerant (a heat exchange medium) circulating in tubes 2, heat exchange (air cooling) with air flowing through tube 2 is performed and condensation water 8 may condense dew on a surface of tubes 2.
  • condensation water 8 is cooled and does not evaporate easily, when quantity of condensation increases, membrane-like aqueous layer 9 consisting of condensation 8 is formed on the surface of tubes 2.
  • antibacterial ingredient 10 held by water absorption sheet substrate 7 dissolves in aqueous layer 9 and diffuses on the surface of tubes 2.
  • antibacterial ingredient 10 is nonvolatile, when heat exchanger 1 stops and condensation water 8 and aqueous layer 9 evaporate, antibacterial ingredient 10 that has diffused remains on the surface of tubes 2.
  • heat exchanger operates again and aqueous layer 9 consisting of condensation water 8 is formed, antibacterial ingredient 10 diffuses on the surface of tubes 2 again. Therefore, by using a chemically stable nonvolatile ingredient as antibacterial ingredient 10, antibacterial ingredient 10 stays on the surface of tubes 2 and sustainable antibacterial function on the entire surface of tubes 2 can be provided.
  • Fig. 4 depicts a diagrammatic vertical cross-sectional view around an upper end part of tubes of the heat exchanger shown in Fig. 1 (A) and depicts, in particular, states of a heat exchanger provided as an evaporator in a refrigeration circuit.
  • insulation seal member 6 is provided at a position close to the upper end part of tube 2 and water absorption sheet substrate 7 intervenes between tube 2 and insulation seal member 6.
  • condensation water 8 may be condensed on the surface of tube 2.
  • condensation water 8 that condenses at a position close to the upper end part of tube 2 comes into contact with water absorption sheet substrate 7, antibacterial compound held by water absorption sheet substrate 7 dissolves in condensation water 8. Because water absorption sheet substrate 7 is provided at a position close to the upper end of tube 2 and is capable of releasing moisture easily, condensation water 8a containing antibacterial compound 10 is released from water absorption sheet substrate 7 by gravity at once and flows upon the surface of tube 2 in a downward direction, and antibacterial compound 10 diffuses over the entire surface of tube 2. As is the case with above-described Fig. 2 , when antibacterial compound 10 is volatile, the diffused antibacterial compound 10 remains upon the surface of tube 2 by the evaporation of condensation water 8a. Therefore, by using a chemically stable volatile compound as antibacterial compound 10, antibacterial compound 10 is kept on the surface of tube 2 and the persistent antibacterial capability can be provided over the entire surface of tubes 2.
  • the present invention is applicable to any kind of heat exchangers and, in particular, is suitable to be used as an evaporator provided in a refrigeration circuit.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Agricultural Chemicals And Associated Chemicals (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Devices For Blowing Cold Air, Devices For Blowing Warm Air, And Means For Preventing Water Condensation In Air Conditioning Units (AREA)
EP10848826A 2010-03-30 2010-03-30 Echangeur de chaleur Withdrawn EP2554937A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2010/002291 WO2011121643A1 (fr) 2010-03-30 2010-03-30 Echangeur de chaleur

Publications (1)

Publication Number Publication Date
EP2554937A1 true EP2554937A1 (fr) 2013-02-06

Family

ID=44711441

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10848826A Withdrawn EP2554937A1 (fr) 2010-03-30 2010-03-30 Echangeur de chaleur

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Country Link
US (1) US20130104588A1 (fr)
EP (1) EP2554937A1 (fr)
CN (1) CN102812323A (fr)
WO (1) WO2011121643A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101642038B1 (ko) * 2016-01-21 2016-07-22 주식회사 브니엘월드 항균용기의 제조방법

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5800673A (en) * 1989-08-30 1998-09-01 Showa Aluminum Corporation Stack type evaporator
JPH06262937A (ja) * 1993-03-12 1994-09-20 Zexel Corp 自動車用空調装置のエバポレータユニット
JP2001033058A (ja) * 1999-07-19 2001-02-09 Matsushita Electric Ind Co Ltd 熱交換器を備えた電気機器
KR100448539B1 (ko) * 1999-06-10 2004-09-13 마쯔시다덴기산교 가부시키가이샤 단백질피복입자 이동용 전기화학장치
JP2004263917A (ja) * 2003-02-28 2004-09-24 Toshiba Kyaria Kk 空気調和機の室内機
JP4333221B2 (ja) 2003-06-06 2009-09-16 株式会社富士通ゼネラル 空気調和機
CN2633397Y (zh) * 2003-07-16 2004-08-18 罗雁 杀菌净化型空气过滤芯片
JP4252530B2 (ja) * 2004-12-13 2009-04-08 ダイキン工業株式会社 空気調和機のドレン水静菌構造
WO2007061191A1 (fr) * 2005-11-23 2007-05-31 Lg Electronics, Inc. Conditionneur d'air
CN201191104Y (zh) * 2008-03-07 2009-02-04 湖南晟通科技集团有限公司 持久亲水杀菌型空调器散热铝箔

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2011121643A1 *

Also Published As

Publication number Publication date
US20130104588A1 (en) 2013-05-02
WO2011121643A1 (fr) 2011-10-06
CN102812323A (zh) 2012-12-05

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