WO2019008944A1 - Échangeur de chaleur - Google Patents

Échangeur de chaleur Download PDF

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Publication number
WO2019008944A1
WO2019008944A1 PCT/JP2018/020459 JP2018020459W WO2019008944A1 WO 2019008944 A1 WO2019008944 A1 WO 2019008944A1 JP 2018020459 W JP2018020459 W JP 2018020459W WO 2019008944 A1 WO2019008944 A1 WO 2019008944A1
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WO
WIPO (PCT)
Prior art keywords
tube
material layer
heat exchanger
tank
flux
Prior art date
Application number
PCT/JP2018/020459
Other languages
English (en)
Japanese (ja)
Inventor
仁 宇都宮
慎吾 大野
詔悟 山田
Original Assignee
株式会社デンソー
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
Priority claimed from JP2018090312A external-priority patent/JP2019015492A/ja
Application filed by 株式会社デンソー filed Critical 株式会社デンソー
Publication of WO2019008944A1 publication Critical patent/WO2019008944A1/fr

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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
    • F28F1/00—Tubular elements; Assemblies of tubular elements
    • F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
    • F28F1/40—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only inside the tubular element
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • 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
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02—Header boxes; End plates

Definitions

  • the present disclosure relates to a heat exchanger.
  • a heat exchanger used as a radiator for a vehicle
  • a plurality of tubes are connected to a tank, and an inner fin is disposed inside each tube.
  • cooling water is supplied from the tank to each tube.
  • heat exchange is performed between the cooling water passing through the inside and the air passing through the outside.
  • the heat exchanger having such a configuration has a configuration in which a plurality of members made of metal (for example, the above-described tube, inner fins, etc.) are brazed to each other.
  • the fuel cell system is provided with an ion exchange resin in order to increase the purity of the circulating cooling water.
  • an ion exchange resin in order to increase the purity of the circulating cooling water.
  • An object of the present disclosure is to provide a heat exchanger that does not cause a bonding failure, although brazing is performed on the inside of a tube without using a flux.
  • a heat exchanger includes a tube in which a flow passage through which a heat transfer medium passes is formed inside, and an inner fin disposed in the flow passage in a state where the heat transfer passage is brazed to the inner surface of the tube. At least one of the tube and the inner fin has a plate-like core layer and a brazing material layer formed to cover the surface of the core layer.
  • the core layer is formed of an aluminum alloy having a magnesium content of 0.1% by weight or more and less than 0.3% by weight.
  • an aluminum alloy containing 0.1% by weight or more of magnesium is used as the core layer.
  • the oxide film formed on the surface of the member is removed by magnesium. For this reason, good joining can be performed without using a flux at least at the junction between the tube and the inner fin (that is, the inside of the tube).
  • the content of magnesium in the core layer exceeds 0.3% by weight, the effect of magnesium for removing the oxide film is reduced as described above. It turns out that. It is considered that this is because excess magnesium exceeding 0.3% by weight reacts with the flux present around it. Therefore, the content of magnesium in the core layer is preferably 0.1% by weight or more and less than 0.3% by weight as described above.
  • FIG. 1 is a view showing an entire configuration of a heat exchanger according to the first embodiment.
  • FIG. 2 is a cross-sectional view showing an internal configuration of a tube provided in the heat exchanger of FIG.
  • FIG. 3 is a cross-sectional view showing a configuration of an inner fin provided in the heat exchanger of FIG.
  • FIG. 4 is a cross-sectional view showing the configuration of a joint portion between a tube and a tank in the heat exchanger of FIG.
  • FIG. 5 is a view for explaining a method of forming an enlarged portion in the tube of FIG. 4;
  • FIG. 6 is a cross-sectional view showing the configuration of the tube according to the second embodiment.
  • FIG. 1 is a view showing an entire configuration of a heat exchanger according to the first embodiment.
  • FIG. 2 is a cross-sectional view showing an internal configuration of a tube provided in the heat exchanger of FIG.
  • FIG. 3 is a cross-sectional view showing a configuration of an inner fin provided in the heat
  • FIG. 7 is a view showing the relationship between the material of the core material layer and the material of the brazing material layer, and the bonding rate.
  • FIG. 8 is a diagram showing the relationship between the material of the core layer and the material of the brazing material layer and the bonding rate.
  • the heat exchanger 10 according to the first embodiment is configured as a radiator mounted on a fuel cell vehicle (not shown).
  • the heat exchanger 10 is for cooling the cooling water that has been heated through the cell stack (not shown) of the fuel cell vehicle by heat exchange with air.
  • cooling water is used as a heat medium passing through the heat exchanger 10.
  • the heat exchanger 10 includes a pair of tanks 100 and 200, a tube 300, an outer fin 400, and a pair of side plates 510 and 520.
  • the tank 100 is a container for internally storing cooling water supplied to the heat exchanger 10 from the outside and supplying the cooling water to a tube 300 described later.
  • the tank 100 is formed as an elongated rod-like container.
  • the tank 100 is disposed with its longitudinal direction along the vertical direction.
  • the tank 100 has a tank plate 110 and a header plate 120.
  • the tank plate 110 is a container made of resin, and has a shape in which a portion on one side (the right side in FIG. 1) is opened. The portion is closed by a header plate 120 described below.
  • the header plate 120 is a plate-like member that covers a portion of the tank plate 110 opened as described above.
  • the header plate 120 is formed of metal.
  • the header plate 120 is fixed to the tank plate 110 by caulking a part thereof.
  • a seal member (not shown) made of resin is sandwiched between the header plate 120 and the tank plate 110. This prevents the coolant from leaking out of the tank 100.
  • a supply port 101 is formed on the tank plate 110 of the tank 100.
  • the supply port 101 is a portion serving as an inlet of cooling water supplied from the outside of the heat exchanger 10 and is formed in a lower portion of the tank plate 110.
  • the tank 200 is a container having substantially the same shape as the tank 100.
  • the tank 200 is for receiving the cooling water coming from the tank 100 through a tube 300 described later, and discharging the cooling water to the outside.
  • the tank 200 is disposed with its longitudinal direction along the vertical direction.
  • the tank 200 has a tank plate 210 and a header plate 220.
  • the tank plate 210 is a container made of resin, and has a shape in which a portion on one side (left side in FIG. 1) is opened. The portion is closed by a header plate 220 described next.
  • the header plate 220 is a plate-like member covering a portion of the tank plate 210 opened as described above.
  • the header plate 220 is formed of metal.
  • the header plate 220 is fixed to the tank plate 210 by caulking a part thereof.
  • a seal member (not shown) made of resin is sandwiched between the header plate 220 and the tank plate 210. This prevents the coolant from leaking out of the tank 200.
  • a discharge port 201 is formed in the tank plate 210 of the tank 200.
  • the discharge port 201 is a portion serving as an outlet of the cooling water discharged from the heat exchanger 10 to the outside, and is formed in the upper side portion of the tank plate 210.
  • the tube 300 is an elongated pipe having a flat cross section, and the heat exchanger 10 is provided with a plurality of tubes.
  • Each tube 300 is formed of an aluminum alloy.
  • a channel FP (see FIG. 2) is formed along its longitudinal direction.
  • the tubes 300 are parallel to each other, and are stacked so as to line up in the vertical direction.
  • the direction in which the tubes 300 are stacked is also referred to as a “stacking direction”.
  • Each tube 300 is connected to the tank 100 at one end and to the tank 200 at the other end. With such a configuration, the space formed inside the tank 100 and the space formed inside the tank 200 are communicated by the flow paths FP of the respective tubes 300.
  • the outer fin 400 is a corrugated fin formed by bending a metal plate in a wave shape.
  • the outer fin 400 is formed of an aluminum alloy.
  • a plurality of outer fins 400 are provided and disposed between the respective tubes 300. The top of each of the corrugated outer fins 400 is in contact with and brazed to each of a pair of tubes 300 disposed on the upper and lower sides thereof.
  • a portion where the plurality of tubes 300 and the outer fins 400 are stacked is a portion where heat exchange is performed between the air and the cooling water.
  • the said part is also called “core part CR.”
  • Each of the side plates 510 and 520 is a plate-like member formed by bending a metal plate.
  • the side plates 510 and 520 are provided to sandwich the core portion CR vertically in order to increase the rigidity of the core portion CR.
  • the side plate 510 is disposed at a position where it becomes one end (specifically, the upper end) in the stacking direction of the core portion CR, with the longitudinal direction along the longitudinal direction of the tube 300.
  • the side plate 520 is disposed at the position that becomes the other end (specifically, the lower end) in the stacking direction in the core portion CR, with the longitudinal direction along the longitudinal direction of the tube 300 There is.
  • An outer fin 400 is also disposed between the tube 300 located on the uppermost side and the side plate 510. Similarly, an outer fin 400 is also disposed between the lowermost one of the tubes 300 and the side plate 520.
  • the flow path of the cooling water will be described.
  • the coolant that has become hot through the cell stack flows from the supply port 101 into the inside of the tank 100 and is stored. Thereafter, the cooling water flows through the flow paths FP of the respective tubes 300 to reach the inside of the tank 200 and is discharged from the discharge port 201 to the outside.
  • a blower fan (not shown) is provided in the vicinity of the heat exchanger 10, and air introduced from the outside of the vehicle by the blower fan is fed to the heat exchanger 10. Air passes between the tubes 300. At this time, the heat of the cooling water passing through the flow path FP of the tube 300 is transferred to the air (heat exchange between air and the cooling water is performed), and the temperature of the cooling water is lowered.
  • the heat of the cooling water is also transmitted to the air through the outer fins 400. That is, the contact area with the passing air is enlarged by the outer fin 400, and the heat exchange between the cooling water and the air is efficiently performed.
  • FIG. 2 shows a cross section when the tube 300 is cut in a plane perpendicular to its longitudinal direction.
  • the inner fin 320 is disposed in the flow path FP formed inside the tube 300.
  • the inner fin 320 is a corrugated fin formed by bending a metal plate in a wave shape. The top of each of the corrugated inner fins 320 abuts against the inner surface of the tube 300 and is brazed. That is, the inner fins 320 are disposed in the flow path FP in a state of being brazed to the inner surface of the tube 300.
  • the cross section of the inner fin 320 is shown enlarged in FIG.
  • the inner fin 320 is formed by bending a plate-like member having a three-layer structure including a core layer 321, a brazing material layer 322, and a brazing material layer 323.
  • the core material layer 321 is a layer that occupies most of the inner fins 320, and is a plate-like layer formed at a central position among the three layers.
  • the core layer 321 of the present embodiment is formed of an aluminum alloy containing magnesium.
  • the content of magnesium in the aluminum alloy is 0.1% by weight or more and less than 0.3% by weight.
  • the brazing material layer 322 is a layer formed so as to cover the entire surface of one side (upper side in FIG. 3) of the core material layer 321.
  • the brazing material layer 322 according to the present embodiment is formed of an aluminum alloy in which silicon is contained in aluminum.
  • the brazing material layer 322 also contains bismuth. The content of bismuth in the brazing material layer 322 is 0.1% by weight or less.
  • the brazing material layer 323 is a layer formed so as to cover the entire surface of the core material layer 321 on the opposite side (the lower side in FIG. 3) to the side on which the brazing material layer 322 is formed.
  • the brazing material layer 323 of the present embodiment is formed of the same material as the brazing material layer 322.
  • each of the brazing material layers 322 and 323 may be formed as a layer containing a slight amount of magnesium.
  • the content thereof is preferably smaller than the content of magnesium in the core layer 321.
  • FIG. 4 is a cross-sectional view showing a structure of a connection portion between the tube 300 and the tank 200.
  • FIG. 4 As shown in FIG. As shown in the figure, in the header plate 220 of the tank 200, through holes 221 are formed corresponding to the respective tubes 300.
  • the tube 300 is soldered to the header plate 220 in a state where one end of the tube 300 is inserted through the through hole 221 into the inside of the tank 200.
  • Space SP on the right side of header plate 220 in FIG. 4 is a space formed inside tank 200. It is an opening formed at the end of the tube 300 that is labeled “OP” in FIG. Below, the thing of the said opening is also described as "the opening OP.”
  • An enlarged portion 310 is formed in a portion of the tube 300 which is inserted into the inside of the tank 200 from the through hole 221.
  • the outer shape of the tube 300 is larger than the outer shape of the other portion of the tube 300.
  • a method of forming the enlarged portion 310 in the tube 300 will be described with reference to FIG. First, the tube 300 in a state in which the enlarged portion 310 is not formed is inserted into the through hole 221 of the header plate 220. Thereafter, a jig 600 having a pointed tip 601 is pressed against the opening OP along the arrow shown in FIG. At this time, the tip portion 601 of the jig 600 enters the inside of the opening OP, and the opening OP is pushed and spread from the inside.
  • the enlarged portion 310 is formed in the vicinity of the opening OP.
  • the outer surface of the tube 300 is strongly pressed against the inner surface of the through hole 221.
  • connection portion between the tube 300 and the tank 100 is the same as the configuration at the connection portion between the tube 300 and the tank 200 described above. Therefore, the specific illustration and description thereof will be omitted.
  • the method of assembling the heat exchanger 10 will be briefly described. First, the plurality of tubes 300, the outer fins 400, and the side plates 510 and 520 stacked along the stacking direction are all sandwiched between the header plate 120 and the header plate 220. At this time, one end of each of the tubes 300 is inserted through the through hole 221 formed in the header plate 220, and a through hole (not shown) having the same shape as the through hole 221 formed in the header plate 120 The other end is inserted through the After the assembly as described above is formed, the enlarged portions 310 described with reference to FIGS. 4 and 5 are formed at both ends of each tube 300.
  • the brazing material layer is formed in advance on the entire surface of the outer fin 400.
  • the brazing material layer is formed of an aluminum alloy in which silicon is contained in aluminum. Further, on the surface of the brazing material layer outside the outer fin 400, a flux for removing an oxide film is applied in advance. On the other hand, no flux is applied to the inside of the tube 300.
  • the flux on the outside of the tube 300 may be applied to the outer surface of each component such as the outer fin 400 at the stage before the heat exchanger 10 is assembled, it may be applied after the assembly .
  • a plurality of tubes 300 stacked along the stacking direction, the outer fins 400, and the side plates 510 and 520 are first assembled by being sandwiched between the header plate 120 and the header plate 220. Then, after making the said assembly into the state which made the lamination direction a horizontal surface, the flux is injected toward the assembly from a plurality of nozzles arranged on the upper side. At this time, if the position of the nozzle is fixed and the position of the assembly is gradually changed by, for example, a belt conveyor, the flux can be applied to the entire assembly.
  • the flux jetted from the nozzle may be in the form of liquid or may be in the form of powder.
  • various methods similar to conventional ones can be adopted.
  • the entire assembly is heated inside the furnace. Thereby, the brazing material layer formed on the surface of the outer fin 400 is melted.
  • the outer surface of the tube 300 in the vicinity of the outer fin 400 and the surfaces of the side plates 510 and 520 are wetted by the melted brazing material layer.
  • brazing material layers 322 and 323 formed on the surface of the inner fin 320 also melt.
  • the inner surface of the tube 300 is wetted by the melted brazing material layers 322, 323.
  • the molten brazing material layers are solidified again. Thereby, the whole of the tube 300, the outer fin 400, the side plates 510 and 520, and the header plates 120 and 220 is brazed and integrated. Thereafter, the header plate 120 is crimped and fixed to the tank plate 110, and the header plate 220 is crimped and fixed to the tank plate 210.
  • Brazing on the inside of the tube 300 ie brazing between the inner surface of the tube 300 and the inner fins 320, takes place without the use of flux as described above.
  • the core material layer 321 of the inner fin 320 contains magnesium, the oxide film formed on the surface of the brazing part (for example, the surface of the brazing material layer 322) is removed by reaction with magnesium. That is, in the present embodiment, since the magnesium contained in the core material layer 321 functions in the same manner as the flux, it is possible to perform good bonding without causing a bonding failure without using the flux.
  • the content of magnesium in the core material layer 321 falls below 0.1% by weight, the above-described removal of the oxide film is not sufficiently performed. Therefore, the content of magnesium in the core layer 321 is preferably 0.1% by weight or more.
  • the content of magnesium in the core layer 321 is preferably 0.1% by weight or more and less than 0.3% by weight as in this embodiment.
  • the portion of the inner fin 320 containing magnesium is the core layer 321 disposed inside.
  • the concentration of magnesium does not become high on the surface of the member at the time of heating, and the reaction between magnesium and, for example, the flux drifting around is suppressed.
  • the strength of the inner fins 320 can be enhanced and the durability of the heat exchanger 10 can be improved.
  • the leftmost column of the tables shown in each of FIGS. 7 and 8 shows the content of magnesium in the core layer 321 in units of weight%.
  • the middle column of the tables shown in each of FIGS. 7 and 8 indicates the content of bismuth in the brazing material layer 322 in units of weight%.
  • the rightmost row of the tables shown in each of FIGS. 7 and 8 is the bonding rate when the materials of the core layer 321 and the brazing material layer 322 are selected as in the left row and the center row.
  • the “bonding rate” is originally bonded along the longitudinal direction of a portion where the inner fins 320 and the inner surface of the tube 300 abut each other (a bonding portion linearly extending along the longitudinal direction of the tube 300). It is the ratio of the length actually joined to the length to be done.
  • the content of bismuth in the brazing material layer 322 is fixed at 0.02% by weight, and then the content of magnesium in the core material layer 321 is changed.
  • the bonding rate is approximately 100%, and the inner fin 320 and the tube 330 There is good bonding between
  • the content of magnesium in the core layer 321 is reduced to 0.05% by weight, the bonding rate is slightly reduced to 86%.
  • the content of magnesium in the core layer 321 is in the range of 0.1 wt% to 0.3 wt%. It was confirmed that it was effective.
  • the content of magnesium in the brazing material layer 322 is changed after fixing the content of magnesium in the core material layer 321 to 0.2% by weight.
  • the bonding rate is approximately 100%, and it is good between the inner fin 320 and the tube 330 Bonding is done.
  • the content of bismuth in the brazing material layer 322 is effective to be 0.1% by weight or less in order to increase the bonding rate. It was done.
  • the content of bismuth in the brazing material layer 322 is extremely reduced to approximately 0% by weight, the bonding rate decreases to 80%.
  • the content of bismuth in the brazing material layer 322 is preferably 0.005% by weight or more and 0.1% by weight or less.
  • brazing at a portion through which the cooling water as a heat medium passes, that is, the inside of the tube 300 is performed without using a flux. For this reason, even if the cleaning for removing the flux from the inside of the tube 300 is simplified (or not carried out at all), the flux dissolved in the cooling water may lower the electrical resistance of the cooling water. It can be prevented. For this reason, it is possible to prevent a situation in which the cell stack is leaked through the cooling water while reducing the cost and labor for removing the flux.
  • a conventional method of applying the flux to the inside of the tube 300 will be briefly described.
  • a plurality of tubes 300 stacked along the stacking direction, the outer fins 400, and the side plates 510 and 520 are first assembled by being sandwiched between the header plate 120 and the header plate 220.
  • a jig is connected to the header plate 120.
  • the jig is a container having a shape similar to that of the tank plate 110, and a supply pipe for supplying a flux to the inside thereof is connected.
  • flux is supplied from the supply pipe to the jig.
  • the flux is supplied from the jig to the inside of each tube 300.
  • the flux flows into the inside of each tube 300 from the end on the jig side, passes through the inside of the tube 300, and is discharged from the other end of the tube 300 to the outside.
  • the flux is applied to the entire inner surface of the tube 300 and the entire surface of the inner fin 320.
  • the outer surface of the tube 300 is strongly pressed against the inner surface of the through hole 221. For this reason, the flux floating in the air or the flux applied to the outer fin 400 is prevented from intruding from the through hole 221 and reaching the opening OP. This further prevents the flux from adhering to the inner surface of the tube 300.
  • the tube 300 is formed of a plate-like member having a three-layer structure including the core layer 301, the brazing material layer 302, and the brazing material layer 303.
  • the inner fin 320 in the present embodiment is formed of a plate-like member having a single-layer structure having only the core material layer 321.
  • the core layer 321 contains no magnesium.
  • the core material layer 301 is a layer that occupies most of the tube 300, and is a plate-like layer formed at a central position among the three layers.
  • the core layer 301 of the present embodiment is formed of the same material as the core layer 321 of the first embodiment. That is, it is formed of an aluminum alloy in which the content of magnesium is 0.1% by weight or more and less than 0.3% by weight.
  • the brazing material layer 302 is a layer formed so as to cover the entire surface of one side (upper side in FIG. 6) of the core material layer 301.
  • the said surface is a surface inside the tube 300, and is a surface where the inner fin 320 is soldered.
  • the brazing material layer 302 of the present embodiment is formed of a material in which zinc is further contained in the same material as the brazing material layer 322 in the first embodiment.
  • the sacrificial anticorrosion action of zinc prevents the potential of the brazing material layer 302 from becoming higher than the potential of the core layer 301.
  • the brazing filler metal layer 302 having such a sacrificial anticorrosion effect can also be referred to as a "wax sacrificial material".
  • the brazing material layer 303 is a layer formed so as to cover the entire surface of the core material layer 301 on the opposite side (the lower side in FIG. 6) to the side on which the brazing material layer 302 is formed.
  • the said surface is an external surface of the tube 300, and is a surface where the outer fin 400 is soldered.
  • the brazing material layer 303 of the present embodiment is formed of the same material as the brazing material layer 323 in the first embodiment.
  • the tube 300 by forming the tube 300 with a plate member having a three-layer structure as described above, an effect similar to that of the first embodiment can be obtained. That is, also in the present embodiment, it is possible to perform brazing on the inside of the tube 300 without using a flux.
  • the material having the brazing material layer and the core material layer may be used as the material of the inner fins 320 as in the first embodiment, or may be used as the material of the tube 300 as in the present embodiment.
  • both the inner fins 320 and the tube 300 may be formed of a material having a brazing material layer and a core material layer.
  • the core layer is preferably formed of an aluminum alloy having a magnesium content of 0.1% by weight or more and less than 0.3% by weight.
  • the potential of the core material layer 301 is V1
  • the potential of the brazing material layer 302 is V2
  • the potential of the inner fins 320 is V3, in order to prevent corrosion in the tube 300, the relationship V1> V2> V3. It is necessary to keep it.
  • the potential V1 of the core layer 301 tends to decrease, and thus the above relationship may be broken.
  • the content of zinc in the brazing material layer 302 be adjusted so that the relationship of V1> V2 is maintained. Furthermore, it is preferable that the content of magnesium in the core layer 301 and the content of zinc in the brazing material layer 302 be adjusted so that the relationship of V1> V2> V3 is maintained.
  • the brazing material layer 303 is formed on the surface of the tube 300 which is in contact with the outer fin 400.
  • the brazing material layer 303 may not be formed on the tube 300.
  • all of the brazing parts different from the brazing parts in which the tube 300 and the inner fins 320 are joined to each other are brazed by using a flux.
  • a part or all of the brazing part different from the brazing part where the tube 300 and the inner fin 320 are joined to each other may be joined without using a flux.
  • the brazing between the tube 300 and the outer fin 400, the brazing between the tube 300 and the header plate 120, and the brazing between the tube 300 and the header plate 220 are also performed without using a flux. It is good also as an aspect. In this case, since the heat exchanger 10 can be brazed without using any flux, the possibility of the flux remaining inside the tube 300 can be further reduced.

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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 (10) pourvu : d'un tube (300), sur le côté interne duquel est formé un canal (FP) à travers lequel passe un agent caloporteur ; et une ailette interne (320) qui est soudée à une surface interne du tube et, dans cet état, est disposée dans le canal. Le tube ou l'ailette interne au minimum comprend : une couche centrale en forme de plaque (321, 301) ; et une couche de soudage (322, 323, 302, 303) formée de manière à recouvrir la surface de la couche centrale. La couche centrale est formée à partir d'un alliage d'aluminium ayant une teneur en magnésium d'au moins 0,1 % en poids et inférieure à 0,3 % en poids.
PCT/JP2018/020459 2017-07-07 2018-05-29 Échangeur de chaleur WO2019008944A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP2017-133273 2017-07-07
JP2017133273 2017-07-07
JP2018-090312 2018-05-09
JP2018090312A JP2019015492A (ja) 2017-07-07 2018-05-09 熱交換器

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WO2019008944A1 true WO2019008944A1 (fr) 2019-01-10

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112753120A (zh) * 2019-04-18 2021-05-04 法雷奥日本株式会社 用于对车辆用电池进行冷却的热交换器

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5231954U (fr) * 1975-08-27 1977-03-05
JP2004025297A (ja) * 2001-09-28 2004-01-29 Furukawa Electric Co Ltd:The アルミニウム又はアルミニウム合金材のろう付け方法およびアルミニウム合金製ブレージングシート
WO2017115597A1 (fr) * 2015-12-28 2017-07-06 株式会社Uacj Feuille de brasage d'alliage d'aluminium, le procédé de production d'un échangeur de chaleur constituée d'alliage d'aluminium

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5231954U (fr) * 1975-08-27 1977-03-05
JP2004025297A (ja) * 2001-09-28 2004-01-29 Furukawa Electric Co Ltd:The アルミニウム又はアルミニウム合金材のろう付け方法およびアルミニウム合金製ブレージングシート
WO2017115597A1 (fr) * 2015-12-28 2017-07-06 株式会社Uacj Feuille de brasage d'alliage d'aluminium, le procédé de production d'un échangeur de chaleur constituée d'alliage d'aluminium

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