WO2017141943A1 - Échangeur de chaleur - Google Patents

Échangeur de chaleur Download PDF

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Publication number
WO2017141943A1
WO2017141943A1 PCT/JP2017/005444 JP2017005444W WO2017141943A1 WO 2017141943 A1 WO2017141943 A1 WO 2017141943A1 JP 2017005444 W JP2017005444 W JP 2017005444W WO 2017141943 A1 WO2017141943 A1 WO 2017141943A1
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WO
WIPO (PCT)
Prior art keywords
aluminum
tube
fin
aluminum fin
heat exchanger
Prior art date
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PCT/JP2017/005444
Other languages
English (en)
Japanese (ja)
Inventor
翼 柳本
浩 井神
涼子 藤村
啓太 白井
良行 大谷
Original Assignee
株式会社Uacj
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
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Application filed by 株式会社Uacj filed Critical 株式会社Uacj
Priority to CN201780003992.5A priority Critical patent/CN108351183B/zh
Priority to KR1020187018112A priority patent/KR20180113499A/ko
Priority to JP2018500141A priority patent/JPWO2017141943A1/ja
Publication of WO2017141943A1 publication Critical patent/WO2017141943A1/fr

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    • 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
    • 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
    • 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
    • F28F1/02—Tubular elements of cross-section which is non-circular
    • 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
    • F28F1/02—Tubular elements of cross-section which is non-circular
    • F28F1/022—Tubular elements of cross-section which is non-circular with multiple channels
    • 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
    • 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
    • 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
    • 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

Definitions

  • the present invention relates to a fin-and-tube heat exchanger.
  • the fin-and-tube heat exchanger has a heat transfer tube through which a refrigerant circulates and a large number of fin plates joined to the heat transfer tube.
  • This type of heat exchanger is often incorporated into, for example, a home air conditioner or a commercial air conditioner.
  • the fin plate of the fin-and-tube heat exchanger is fixed to the heat transfer tube by a method such as metal bonding by brazing or fixing by tube expansion. Thereby, the fin plate and the heat transfer tube are electrically connected. Further, the fin plate is configured so that the natural potential is lower than the natural potential of the heat transfer tube. In the conventional heat exchanger configured as described above, the fin plate serves as a sacrificial anode, whereby corrosion of the heat transfer tube can be suppressed over a long period of time.
  • Patent Document 1 a technique for joining the heat transfer tube to the fin plate using an adhesive has been proposed.
  • the adhesive does not have electrical conductivity, it is difficult to electrically connect the heat transfer tube and the fin plate when the heat transfer tube is joined to the fin plate using the adhesive. Therefore, it is difficult for the heat exchanger in which the heat transfer tube and the fin plate are joined by the adhesive to cause the fin plate to act as a sacrificial anode. For example, when a defect such as a pinhole is present in the adhesive, the heat transfer tube is likely to corrode starting from the defect.
  • a method of adding conductivity to the adhesive by adding a conductive filler such as silver or carbon to the adhesive can be considered.
  • a conductive filler such as silver or carbon
  • the present invention has been made in view of such a background, and is intended to provide a heat exchanger that is low in cost and capable of suppressing corrosion of a heat transfer tube over a long period of time.
  • One aspect of the present invention is an aluminum tube; An aluminum fin having an assembly hole into which the aluminum tube is inserted; A conducting portion where the aluminum tube and the aluminum fin are in contact; Having an adhesive layer formed between the aluminum tube and the aluminum fin;
  • the length of the conductive portion is 5 to 40% when the sum of the length of the adhesive layer and the length of the conductive portion is 100%,
  • the natural potential at the surface of the aluminum tube is higher than the natural potential at the surface of the aluminum fin, and the potential difference between the two is 30 to 200 mV.
  • the heat exchanger includes the aluminum tube and the aluminum fin.
  • the aluminum tube is electrically connected to the aluminum fin through the conduction portion.
  • the natural potential on the surface of the aluminum tube is nobler than the natural potential on the surface of the aluminum fin, and the potential difference between the two is 30 to 200 mV. Therefore, the aluminum fin serves as a sacrificial anode, and corrosion of the aluminum tube can be suppressed over a long period of time.
  • the adhesive layer is formed between the aluminum tube and the aluminum fin. Therefore, in the operation
  • the heat exchanger is low in cost and can suppress the corrosion of the aluminum tube over a long period of time.
  • FIG. 2 is a partially enlarged cross-sectional view in the vicinity of a conduction part in FIG. 1.
  • FIG. 3 is a partial cross-sectional view taken along line III-III in FIG. 1. It is a perspective view of the test piece used for adhesive evaluation in Experimental example 1.
  • FIG. 3 is a partially enlarged cross-sectional view in the vicinity of a conduction part in FIG. 1.
  • FIG. 3 is a partial cross-sectional view taken along line III-III in FIG. 1.
  • the conduction portion is formed in a portion where no adhesive layer is present between the aluminum tube and the aluminum fin. That is, the aluminum tube has, on its outer surface, a region that is in contact with the aluminum fin and a region that is covered with the adhesive layer.
  • the length of the conductive portion is 5 to 40% when the sum of the length of the adhesive layer and the length of the conductive portion is 100% in a plan view as viewed from the thickness direction of the aluminum fin.
  • the length of the conductive portion is set to 40% or less, the bonding area between the aluminum fin and the aluminum tube can be sufficiently widened. As a result, the adhesive force between the aluminum fin and the aluminum tube can be further increased.
  • the length of the conductive portion is 10 to 30%.
  • the natural potential on the surface of the aluminum tube is more noble than the natural potential on the surface of the aluminum fin, and the potential difference between them is 30 to 200 mV.
  • the aluminum fin can act as a sacrificial anode. As a result, corrosion of the aluminum tube can be suppressed over a long period of time.
  • the aluminum tube When the natural potential of the aluminum tube is lower than the natural potential of the aluminum fin, the aluminum tube corrodes before the aluminum fin, so that the corrosion of the aluminum tube is accelerated.
  • the potential difference between the two is less than 30 mV, the effect of suppressing corrosion of the aluminum tube may be insufficient.
  • the potential difference between the natural potential on the surface of the aluminum tube and the natural potential on the surface of the aluminum fin is set to 30 mV or more. From the same viewpoint, it is preferable that the potential difference between them is 60 mV or more.
  • the potential difference between the two is greater than 200 mV, the corrosion rate of the aluminum fins becomes excessively high, and the action of the sacrificial anode by the aluminum fins may be impaired early. As a result, the effect of suppressing corrosion of the aluminum tube may be insufficient.
  • the potential difference between the natural potential on the surface of the aluminum tube and the natural potential on the surface of the aluminum fin is set to 200 mV or less. From the same viewpoint, it is preferable that the potential difference between the two is 150 mV or less.
  • the aluminum tube pipe materials having various shapes such as a round tube, an elliptical tube, and a flat tube can be employed.
  • the aluminum tube may be an extruded shape formed by extrusion, or may be a formed plate formed by joining aluminum plates formed into a tubular shape by brazing or the like.
  • the flat tube described above includes a so-called flat multi-hole tube having a plurality of flow paths inside the tube.
  • the aluminum tube is a flat tube
  • the flat tube and the aluminum fin can be brought into contact with each other with a relatively small pressing force by pressing the flat tube inserted into the assembly hole in the width direction. Therefore, in this case, in the operation of bonding the flat tube to the aluminum fin, the deformation of the flat tube and the aluminum fin accompanying pressing can be more effectively suppressed.
  • the adhesive layer is preferably formed between the flat surface of the flat tube and the aluminum fin.
  • An adhesive can be easily applied to the flat surface of the flat tube using, for example, a roll coater.
  • an adhesive layer can be more easily formed between an aluminum fin and a flat surface by inserting the flat tube which apply
  • a zinc thermal spray coating may be formed on the surface of the aluminum tube. In this case, corrosion of the aluminum tube can be suppressed for a longer period.
  • the amount of zinc attached to the surface of the aluminum tube is preferably 3 to 12 g / m 2 .
  • the aluminum tube may be made of aluminum or aluminum alloy.
  • an aluminum alloy for example, an alloy containing Mn (manganese), Si (silicon), Fe (iron) and Cu (copper), with the remainder having chemical components composed of Al (aluminum) and inevitable impurities should be adopted. Can do.
  • the Mn content is preferably 0.10 to 1.50% by mass.
  • the Mn content is preferably 0.10 to 1.50% by mass.
  • the amount of the Al—Mn intermetallic compound can be increased.
  • the strength of the aluminum tube can be further improved.
  • Fe is taken into the Al—Mn intermetallic compound, thereby preventing a decrease in corrosion resistance due to Fe.
  • Mn can make the natural potential of the aluminum tube noble. Therefore, the potential difference between the aluminum tube and the aluminum fin can be easily increased by setting the Mn content to 0.10% by mass or more. As a result, the corrosion resistance of the aluminum tube can be further improved.
  • the Mn content is preferably 1.50% by mass or less.
  • the Si content is preferably 0.10 to 0.60 mass%. Coexistence of Si and Mn produces an Al—Mn—Si intermetallic compound. Thereby, the production amount of the Al—Mn intermetallic compound can be reduced. Therefore, when the Si content is 0.10% by mass or more, excessive generation of Al—Mn intermetallic compounds can be easily avoided, and the extrudability of the aluminum tube can be easily reduced. It can be avoided.
  • the Si content is preferably 0.60% by mass or less.
  • the Fe content is preferably 0.10 to 0.80 mass%. Coexistence of Fe and Mn or Si produces an Al—Mn—Fe intermetallic compound or an Al—Mn—Fe—Si intermetallic compound. Thereby, the production amount of the Al—Mn intermetallic compound can be reduced. Therefore, by setting the Fe content to 0.10% by mass or more, excessive generation of Al—Mn intermetallic compounds can be easily avoided, and the extrudability of the aluminum tube can be easily reduced. It can be avoided.
  • the Fe content is preferably 0.80% by mass or less.
  • the Cu content is preferably 0.050 to 0.70% by mass.
  • Cu can make the natural potential of the aluminum tube noble. Therefore, the potential difference between the aluminum tube and the aluminum fin can be easily increased by setting the Cu content to 0.050 mass% or more. As a result, the corrosion resistance of the aluminum tube can be further improved.
  • the Cu content is preferably 0.70% by mass or less.
  • the aluminum fins assembled to the aluminum tube usually have a plate thickness of 0.07 to 0.15 mm.
  • the aluminum fin has an assembly hole for inserting an aluminum tube.
  • the assembly hole is formed in a shape corresponding to the outer shape of the aluminum tube, such as a circle, an ellipse, or an oval.
  • the assembly hole may be a notch provided in the aluminum fin.
  • the heat exchanger can be manufactured by a so-called knuckling method in which an aluminum tube is press-fitted from the open portion of the notch.
  • the aluminum fin and the aluminum tube can be easily brought into contact with each other after the aluminum tube is press-fitted into the notch. As a result, the conduction part can be easily formed.
  • the notch is preferably formed in a shape corresponding to the outer shape of the aluminum tube, such as a semicircular shape, a semi-elliptical shape, or a U shape.
  • the electrical connection between the aluminum fin and the aluminum tube can be performed more easily, and the adhesive force between the two can be further increased.
  • the aluminum fin may have a collar portion protruding from the periphery of the assembly hole.
  • the aluminum tube inserted into the assembly hole can be easily brought into contact with the collar portion.
  • the conduction part can be easily formed.
  • the height of the collar portion is 200 ⁇ m or more and 1 ⁇ 2 or less of the thickness of the flat tube, and the collar portion and the adhesive layer in the height direction of the collar portion
  • the contact length is preferably not less than 200 ⁇ m and not more than the height of the collar portion.
  • the height of the collar portion is 200 ⁇ m or more, the area of the contact portion between the flat tube and the collar portion can be increased. As a result, the conduction part can be easily formed.
  • the height of the collar portion is excessively high, it is necessary to increase the pitch of the aluminum fins, so that the number of aluminum fins attached to the flat tube is reduced. As a result, the cooling performance of the heat exchanger may be deteriorated. From the viewpoint of avoiding such a problem, it is preferable that the height of the collar portion is 1 ⁇ 2 or less of the thickness of the flat tube.
  • the contact length between the collar portion and the adhesive layer is 200 ⁇ m or more, the adhesive force between the flat tube and the aluminum fin can be further increased.
  • the contact length between the collar portion and the adhesive layer is structurally less than the height of the collar portion.
  • the aluminum fins may be made of aluminum or aluminum alloy.
  • the aluminum alloy include additive elements such as Zn (zinc), Fe, Mn, Si, Cu, Mg (magnesium), Cr (chromium), Ti (titanium), V (vanadium), and Sn (tin). 1 type or more is contained and what consists of Al and an unavoidable impurity can be employ
  • the Zn content is preferably 6.0% by mass or less. Zn can lower the natural potential of the aluminum fin surface. By setting the Zn content in the specific range, the potential difference between the natural potential on the surface of the aluminum fin and the natural potential on the surface of the aluminum tube can be easily adjusted. As a result, the potential difference in the specific range can be easily realized.
  • the Zn content is excessively large, the self-corrosion resistance of the aluminum fins may be lowered.
  • the Zn content is preferably 6.0% by mass or less.
  • the Fe content is preferably 0.10 to 0.80 mass%. Fe dissolves in the Al matrix, and the strength of the aluminum fins can be improved by solid solution strengthening. Further, Fe can be dispersed in the base material as an Fe-based crystallized product, and the strength of the aluminum fin can be improved by dispersion strengthening. By setting the content of Fe to 0.10% by mass or more, the strength of the aluminum fin can be further increased by solid solution strengthening and dispersion strengthening.
  • the Fe content is excessively large, an intermetallic compound containing Fe crystallizes on the surface of the aluminum fin, which may lead to a decrease in corrosion resistance. Therefore, from the viewpoint of avoiding a decrease in corrosion resistance, the Fe content is preferably 0.80% by mass or less.
  • the Mn content is preferably 0.10 to 2.0% by mass.
  • the Mn content is preferably 0.10 to 2.0% by mass.
  • the amount of the Al—Mn intermetallic compound can be increased.
  • the strength of the aluminum tube can be further improved.
  • Fe is taken into the Al—Mn intermetallic compound, thereby preventing a decrease in corrosion resistance due to Fe.
  • the Mn content is preferably set to 2.0% by mass or less.
  • the content of Si is preferably 0.10 to 1.50% by mass.
  • Si has a function of being dissolved in the aluminum matrix and improving the strength of the aluminum fin in accordance with the amount of addition.
  • Si coexists with Mn to precipitate fine Al—Mn—Si intermetallic compounds, thereby improving the strength and workability.
  • the Si content is preferably 1.50% by mass or less.
  • the Cu content is preferably 0.10% by mass or less. If the Cu content is excessively large, the corrosion rate of the aluminum fins may be increased and the natural potential of the surface may become noble. By restricting the Cu content to 0.10% by mass or less, these problems can be easily avoided.
  • Mg, Cr, Ti, V, Sn and the like may be added as appropriate.
  • An adhesive layer is formed between the aluminum tube and the aluminum fin.
  • an adhesive such as a hot melt adhesive such as a thermoplastic resin and a hot melt adhesive; a reactive adhesive such as a thermosetting resin and a thermosetting adhesive can be used.
  • Specific examples of the heat curable adhesive include known adhesives such as epoxy adhesives, polyurethane adhesives, and phenol adhesives. These adhesives may be used independently and may use multiple types together.
  • the adhesive layer preferably covers the entire outer surface of the aluminum tube excluding the conductive part. In this case, the presence of the adhesive layer can further improve the corrosion resistance of the aluminum tube.
  • the aluminum tube and the aluminum fin have a chemical conversion film on the surface.
  • the adhesiveness of the adhesive layer can be further increased.
  • the adhesive force between the aluminum tube and the aluminum fin can be further increased.
  • Examples of the chemical conversion film include reactive chemical conversion treatment such as phosphate chromate treatment, chromate chromate treatment, zirconium phosphate treatment, and titanium phosphate treatment; coating chemical conversion treatment such as coating chromate treatment and coating zirconium treatment; boehmite Films formed by various treatments such as an oxide film-based chemical conversion treatment such as treatment can be employed.
  • reactive chemical conversion treatment such as phosphate chromate treatment, chromate chromate treatment, zirconium phosphate treatment, and titanium phosphate treatment
  • coating chemical conversion treatment such as coating chromate treatment and coating zirconium treatment
  • boehmite Films formed by various treatments such as an oxide film-based chemical conversion treatment such as treatment can be employed.
  • Example 1 An embodiment of the heat exchanger will be described with reference to the drawings.
  • the heat exchanger 1 has an aluminum tube 2, an aluminum fin 3, a conduction part 11, and an adhesive layer 4.
  • the aluminum fin 3 has an assembly hole 31 into which the aluminum tube 2 is inserted.
  • the aluminum tube 2 is in contact with the aluminum fin 3 at the conduction portion 11.
  • the adhesive layer 4 is formed between the aluminum tube 2 and the aluminum fin 3.
  • the aluminum tube 2 is electrically connected to the aluminum fin 3 through the conduction part 11.
  • the natural potential on the surface of the aluminum tube 2 is nobler than the natural potential on the surface of the aluminum fin 3, and the potential difference between them is 30 to 200 mV.
  • the heat exchanger 1 of this example includes a number of aluminum fins 3 arranged at intervals in the plate thickness direction, and a plurality of aluminum tubes 2 extending in the plate thickness direction of the aluminum fins 3. And have.
  • the aluminum fin 3 has a substantially rectangular shape in plan view as viewed from the thickness direction.
  • the assembly hole 31 in the aluminum fin 3 of this example is a notch 311 provided in the outer peripheral edge of the aluminum fin 3.
  • the notch 311 extends in the plate width direction from the outer peripheral edge of the aluminum fin 3 and has a U shape in plan view.
  • the notch 311 is configured so that the aluminum tube 2 can be press-fitted from an open portion 312 provided at the outer peripheral edge of the aluminum fin 3.
  • the aluminum fin 3 of this example has a collar portion 32 protruding from the peripheral edge of the assembly hole 31.
  • the height of the color part 32 is not specifically limited, For example, it can be 200 micrometers or more.
  • the aluminum tube 2 of this example is a flat multi-hole tube 21 in which a cross section in the longitudinal direction has an oval shape and a plurality of flow paths 211 are formed therein.
  • the flat multi-hole tube 21 is disposed so that the width direction thereof is parallel to the plate width direction of the fin plate.
  • the flat multi-hole tube 21 is in contact with the collar portion 32 at one end portion 212 in the width direction, that is, a portion having a curved surface.
  • the one end portion 212 of the flat multi-hole tube 21 and the tip portion 321 of the U-shape of the collar portion 32 constitute the conducting portion 11.
  • the flat surface 213 and the other end 214 of the flat multi-hole tube 21 are covered with the adhesive layer 4.
  • the adhesive layer 4 is formed between the flat surface 213 of the flat multi-hole tube 21 and the collar portion 32.
  • the heat exchanger 1 of this example can be manufactured as follows, for example. First, the aluminum fins 3 prepared by a conventional method are arranged at intervals in the plate thickness direction. Next, an adhesive is applied to the flat surface 213 and the other end 214 of the flat multi-hole tube 21 prepared by a conventional method using a roll coater or the like. At this time, one end 212 of the flat multi-hole tube 21 may be covered with a masking material. In this case, adhesion of the adhesive to one end 212 can be reliably prevented.
  • the flat multi-hole tube 21 is press-fitted into the assembly hole 31 of the aluminum fin 3, and one end 212 of the flat multi-hole tube 21 and the tip 321 of the collar portion 32 are brought into contact with each other. Thereby, the conduction
  • the heat exchanger 1 has a flat multi-hole tube 21 as an aluminum tube 2 and aluminum fins 3.
  • the flat multi-hole tube 21 is electrically connected to the aluminum fin 3 through the conduction portion 11.
  • the natural potential on the surface of the flat multi-hole tube 21 is nobler than the natural potential on the surface of the aluminum fin 3, and the potential difference between them is 30 to 200 mV. Therefore, the aluminum fin 3 becomes a sacrificial anode, and corrosion of the flat multi-hole tube 21 can be suppressed over a long period of time.
  • an adhesive layer 4 is formed between the flat multi-hole tube 21 and the aluminum fin 3. Therefore, in the operation
  • the heat exchanger 1 is low in cost and can suppress the corrosion of the flat multi-hole tube 21 over a long period of time.
  • the shape of one end 212 in the width direction of the flat multi-hole tube 21 corresponds to the shape of the collar portion 32 of the aluminum fin 3. Therefore, the conduction part 11 can be formed more easily.
  • the aluminum fin 3 has higher rigidity than an aluminum fin that does not have the collar portion 32. Therefore, in the operation
  • the adhesive layer 4 is formed between the flat surface 213 of the flat multi-hole tube 21 and the aluminum fin 3. Therefore, the adhesive layer 4 can be more easily formed between the aluminum fin 3 and the flat surface 213 by inserting the flat multi-hole tube 21 in which the adhesive is previously applied to the flat surface 213 into the assembly hole 31. it can. Therefore, in this case, the workability of the work of bonding the flat multi-hole tube 21 to the aluminum fin 3 can be further improved.
  • the assembly hole 31 of this example is a U-shaped notch 311 provided in the aluminum fin 3. Therefore, the heat exchanger 1 can be easily manufactured by press-fitting the flat multi-hole tube 21 from the opening 312 of the notch 311. Furthermore, after the flat multi-hole tube 21 is press-fitted into the notch 311, the aluminum fin 3 and the flat multi-hole tube 21 can be easily brought into contact with each other. As a result, the conduction part 11 can be easily formed.
  • the aluminum fin 3 has a collar portion 32 protruding from the peripheral edge of the assembly hole 31.
  • the flat multi-hole tube 21 inserted into the assembly hole 31 can be easily brought into contact with the collar portion 32.
  • the conduction part 11 can be easily formed.
  • Example 1 In this example, the performance of the heat exchanger 1 is evaluated.
  • the specimen used for evaluation was produced as follows. Of the reference numerals used below, the same reference numerals as those used in the examples indicate the same components as in the first example unless otherwise specified.
  • ⁇ Preparation of flat multi-hole tube 21> Casting of an aluminum alloy containing Si: 0.15% by mass, Mn: 0.12% by mass, Cu: 0.43% by mass and Fe: 0.20% by mass with the balance being a chemical component consisting of Al and impurities The lump was extruded to produce a flat multi-hole tube 21 having an oval cross-sectional shape.
  • the flat multi-hole tube 21 of this example has a length of 60 mm, a width of 14 mm, a thickness of 1.5 mm, and a wall thickness of 0.35 mm. Further, the flat multi-hole tube 21 includes 16 channels 211 having a square shape of 0.5 mm square.
  • ⁇ Spontaneous potential> A 5% NaCl aqueous solution adjusted to pH 3 with acetic acid was prepared. Using this aqueous solution, the natural potential on the surface of the aluminum fin 3 and the natural potential on the surface of the flat multi-hole tube 21 were measured at room temperature. The results are shown in Table 2. Further, the potential difference obtained by subtracting the natural potential of the surface of the aluminum fin 3 from the natural potential of the surface of the flat multi-hole tube 21 is shown in the “potential difference” column of Table 2.
  • ⁇ Adhesiveness> Separately from the test body used for the corrosion resistance evaluation etc., as shown in FIG. 4, a test piece in which one flat multi-hole tube 21 was bonded to the aluminum fin 3 was prepared. This test piece has a through hole 33 for connecting the aluminum fins 3 with the connecting pin 5 provided in the aluminum fin 3 and the number of the flat multi-hole tubes 21 is one. It has the same configuration as the test specimen used for corrosion resistance evaluation. In FIG. 4, the flat multi-hole tube 21 is simplified by reducing the number of the flow paths 211.
  • the connecting pins 5 were inserted into the through holes 33 to connect the aluminum fins 3 to each other. Then, the connecting pin 5 was pulled with the flat multi-hole tube 21 fixed, and the maximum load until the flat multi-hole tube 21 was completely pulled out from the aluminum fin 3 was measured. Then, the value obtained by dividing the obtained maximum load by the number of aluminum fins 3 was defined as the adhesive force between the flat multi-hole tube 21 and the aluminum fins 3.
  • this adhesive force is 400 N or more
  • “A +” is described in the “adhesive” column of Table 2, and when it is 300 N or more and less than 400 N, “A” is described in the same column. When it is less than 300 N, “B” is described in the same column.
  • each of the test bodies 1 to 21 has the conduction part 11, and the potential difference between the natural potential on the surface of the flat multi-hole tube 21 and the natural potential on the surface of the aluminum fin 3 is as described above. It was a specific range. Therefore, it was excellent in both adhesiveness and corrosion resistance.
  • specimens 2 to 3, 6 to 7, 10 to 12, 15 to 16, and 19 to 20 in which the potential difference between them was in the range of 60 to 150 mV showed particularly excellent corrosion resistance.
  • the specimens 22, 24, and 26 had a small potential difference, so that the anticorrosion effect by the aluminum fins 3 was insufficient. Moreover, since the test bodies 23, 25, and 27 had a large potential difference, the corrosion rate of the aluminum fin 3 was excessively increased. As a result, the action of the sacrificial anode by the aluminum fin 3 was impaired early.
  • the electrical connection between the flat multi-hole tube 21 and the aluminum fin 3 was not formed because the length of the conductive portion 11 was smaller than the specific range.
  • the aluminum fin 3 was not a sacrificial anode.
  • the test bodies 32 to 35 since the length of the conductive portion 11 was larger than the specific range, the adhesion between the flat multi-hole tube 21 and the aluminum fin 3 was low.
  • Example 2 In this example, the adhesiveness between the aluminum fin 3 and the aluminum tube 2 is evaluated when the height of the collar portion 32 is variously changed.
  • a test specimen was prepared in the same manner as in Experimental Example 1 except that the height of the collar portion 32 was changed as shown in Table 3. And evaluation of the adhesiveness of the obtained test body was performed by the same method as Example 2.
  • the contact length between the collar portion 32 and the adhesive layer 4 in the obtained specimen was measured by the following method.
  • the height of the collar portion 32 was 200 ⁇ m or more and 1/2 or less of the thickness of the flat multi-hole tube 21. Further, the contact length between the collar portion 32 and the adhesive layer 4 was 200 ⁇ m or more and not more than the height of the collar portion 32. Therefore, the adhesiveness was better than that of the test body 38 in which the height of the collar portion 32 and the contact length between the collar portion 32 and the adhesive layer 4 were outside the specific range.
  • Example 3 the adhesion between the aluminum fin 3 and the aluminum tube 2 when the chemical conversion film is formed is evaluated using a test piece.
  • a test piece was produced as follows and a tensile shear test defined in JIS K6850 was performed.
  • ⁇ Base material and adherend> A plurality of plate materials made of JIS A1050 aluminum having a thickness of 3.0 mm, a width of 25 mm, and a length of 100 mm were prepared and subjected to a degreasing treatment. Then, the phosphoric acid chromate process was performed to some board
  • test piece The plate material obtained by the above was used as a base material and a to-be-adhered material, and the test piece was created in the following procedures. First, an epoxy adhesive was applied to the surface of the substrate, and the adhesive was dried by heating at 100 ° C. for 10 minutes. The thickness of the adhesive was 15 to 25 ⁇ m. Subsequently, the base material and the adherend were overlapped in the combinations shown in Table 4, and heated at 170 ° C. for 15 minutes. The overlapping length of the base material and the adherend was 12.5 mm ⁇ 0.25 mm. The base material and the adherend were bonded as described above to produce a test piece.
  • the fracture form of the test piece B1 in which the chemical conversion film was formed on both the substrate and the adherend was cohesive failure of the adhesive.
  • all of the fracture forms of the test bodies B2 to B4 were interfacial peeling at the interface between the base material having no chemical conversion film and the adhesive or the interface between the adherend having no chemical conversion film and the adhesive. From these results, it can be understood that the adhesiveness between the adhesive layer 4 and the chemical conversion film is higher than the adhesiveness between the adhesive layer 4 and aluminum. Therefore, it can be understood that the adhesiveness between the aluminum tube 2 and the aluminum fin 3 can be increased by forming the chemical conversion film on both the aluminum tube 2 and the aluminum fin 3.
  • the heat exchanger 1 of this invention is not limited to the aspect of the Example and experiment example which were mentioned above, A structure can be changed suitably in the range which does not impair the meaning.
  • the example in which the entire surface of the outer surface of the aluminum tube 2 other than the conductive portion 11 is covered with the adhesive layer 4 has been described, but the other end 214 of the aluminum tube 2 is the adhesive layer 4.
  • the aluminum may be exposed without being covered.
  • the flat multi-hole tube 21 is used as the aluminum tube 2, but a round tube or an elliptic tube can be used instead of the flat multi-hole tube 21.
  • the example in which the assembly hole 31 is the notch 311 has been shown.
  • the assembly hole 31 may have a shape that does not have the opening portion 312 such as a circle, an ellipse, or an oval. Good.
  • the heat exchanger 1 can be assembled by inserting the aluminum tube 2 whose surface is previously coated with an adhesive into the assembly hole 31 from the thickness direction of the aluminum fin 3.
  • the flow path 211 formed inside the aluminum tube 2 can be appropriately changed according to the required cooling performance.
  • the example of the flat multi-hole tube 21 having the square channel 211 is shown, but the shape of the channel 211 may be triangular. Further, it is possible to provide a protrusion or the like for disturbing the flow of the refrigerant in the flow path 211.

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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)

Abstract

La présente invention concerne un échangeur de chaleur (1) qui a un coût faible et avec lequel il est possible de supprimer la corrosion de tubes de transfert thermique pendant une longue durée. L'échangeur de chaleur (1) comportent des tubes en aluminium (2), des ailettes en aluminium (3), des parties conductrice (11) et des couches adhésives (4). Les ailettes en aluminium (3) comportent des trous d'ajustement (31) dans lesquels les tubes en aluminium (2) sont insérés. Les tubes en aluminium (2) sont en contact avec les ailettes en aluminium (3) au niveau des parties conductrice (11). Les couches adhésives (4) sont formées entre les tubes en aluminium (2) et les ailettes en aluminium (3). En vue plane en observant depuis la direction d'épaisseur de plaque des ailettes en aluminium (3), la longueur d'une partie conductrice (11), la somme de la longueur d'une couche adhésive (4) et de la longueur de la partie conductrice (11) étant de 100 %, est de 5 à 40 %. Le potentiel naturel à la surface des tubes en aluminium (2) est plus élevé que le potentiel naturel à la surface des ailettes en aluminium (3), et la différence de potentiel entre ceux-ci est de 30 à 200 mV.
PCT/JP2017/005444 2016-02-15 2017-02-15 Échangeur de chaleur WO2017141943A1 (fr)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021095567A1 (fr) * 2019-11-14 2021-05-20 ダイキン工業株式会社 Tuyau de transfert de chaleur et échangeur de chaleur
WO2023282112A1 (fr) * 2021-07-08 2023-01-12 株式会社Uacj Matériau d'ailette préalablement revêtu et son procédé de fabrication
WO2023282111A1 (fr) * 2021-07-08 2023-01-12 株式会社Uacj Matériau préenduit pour ailettes et son procédé de fabrication

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4713650Y1 (fr) * 1969-12-06 1972-05-18
JPH0252995A (ja) * 1988-08-12 1990-02-22 Nippon Light Metal Co Ltd 耐食性に優れた熱交換器コア
JP2012247091A (ja) * 2011-05-26 2012-12-13 Sumitomo Light Metal Ind Ltd フィン・アンド・チューブ型熱交換器
JP2013019596A (ja) * 2011-07-11 2013-01-31 Mitsubishi Electric Corp 熱交換器、室内機、および室外機
JP2015117876A (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
JP2015117874A (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

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4115019B2 (ja) * 1998-12-04 2008-07-09 古河スカイ株式会社 機械かしめ式熱交換器用フィン材
JP2000274980A (ja) * 1999-03-18 2000-10-06 Denso Corp アルミニウム製熱交換器
JP5710946B2 (ja) * 2010-11-25 2015-04-30 三菱アルミニウム株式会社 熱交換器用偏平管および熱交換器
JP5855032B2 (ja) 2013-02-06 2016-02-09 三菱電機株式会社 熱交換器の製造装置及び熱交換器の製造方法
WO2014196183A1 (fr) * 2013-06-02 2014-12-11 株式会社Uacj Échangeur thermique et matériau d'ailette pour ledit échangeur thermique

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4713650Y1 (fr) * 1969-12-06 1972-05-18
JPH0252995A (ja) * 1988-08-12 1990-02-22 Nippon Light Metal Co Ltd 耐食性に優れた熱交換器コア
JP2012247091A (ja) * 2011-05-26 2012-12-13 Sumitomo Light Metal Ind Ltd フィン・アンド・チューブ型熱交換器
JP2013019596A (ja) * 2011-07-11 2013-01-31 Mitsubishi Electric Corp 熱交換器、室内機、および室外機
JP2015117876A (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
JP2015117874A (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

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021095567A1 (fr) * 2019-11-14 2021-05-20 ダイキン工業株式会社 Tuyau de transfert de chaleur et échangeur de chaleur
JP2021081081A (ja) * 2019-11-14 2021-05-27 ダイキン工業株式会社 伝熱管、及び、熱交換器
JP7381909B2 (ja) 2019-11-14 2023-11-16 ダイキン工業株式会社 伝熱管、及び、熱交換器
WO2023282112A1 (fr) * 2021-07-08 2023-01-12 株式会社Uacj Matériau d'ailette préalablement revêtu et son procédé de fabrication
WO2023282111A1 (fr) * 2021-07-08 2023-01-12 株式会社Uacj Matériau préenduit pour ailettes et son procédé de fabrication

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JPWO2017141943A1 (ja) 2018-12-06
CN108351183A (zh) 2018-07-31
KR20180113499A (ko) 2018-10-16

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