JP6341098B2 - Manufacturing method of parallel flow type heat exchanger - Google Patents

Description

  The present invention relates to a method for manufacturing a parallel flow type heat exchanger, and more specifically, a plurality of aluminum flat heat exchange tubes arranged between a pair of aluminum header pipes and parallel to each other, The present invention relates to a method for manufacturing a parallel flow heat exchanger comprising a plurality of aluminum corrugated fins interposed between the flat heat exchange tubes. Here, aluminum is meant to include an aluminum alloy.

  Generally, a corrugated fin type parallel flow heat exchanger is formed by joining a corrugated fin and a flat heat exchange pipe (hereinafter referred to as a flat pipe) by a brazing method. In such a heat exchanger, aluminum corrugated fins and flat tubes are alternately stacked to produce a heat exchanger core, and other necessary components are temporarily assembled to the heat exchanger core and brazed in the furnace. Thousands of joints are integrated at once.

  In order to perform brazing in the furnace, a corrugated fin made of a brazing sheet in which the entire surface of an aluminum base material is clad with a brazing material and a flat tube made of aluminum whose outer surface is sprayed with zinc are used.

  The corrugated fin made of the above brazing sheet has the advantage that it can be joined at once by brazing in the furnace even if it has a complicated shape, but it requires a cladding process in which the brazing material is bonded to the entire surface, so compared to the bare material Manufacturing cost increases. Further, since the base material is eroded by the brazing material during brazing in the furnace, it is difficult to reduce the thickness.

  In addition, when forming a sacrificial anti-corrosion layer by spraying zinc in aluminum flat tubes, if coarse zinc particles adhere to the flat tube surface, the flat tube base material will be eroded during brazing or spraying in the furnace. There is a concern that a through hole may be formed.

  Therefore, in order to solve the above problems, a method of manufacturing a heat exchanger described in Patent Documents 1, 2, and 3 using an adhesive that replaces brazing joining with a large amount of heat with adhesive joining with a small amount of heat has been proposed. ing.

  Patent Document 1 discloses a process of applying an adhesive resin to the surface of a flat tube and then drying, a step of fitting the flat tube into an assembly hole provided in the fin, and a process of manufacturing an assembly. The manufacturing method which has the process of hold | maintaining a body to the temperature below melting / reaction temperature (100-200 degreeC) and integrating a flat tube and a fin is disclosed.

  Patent Document 2 discloses a process of solvent degreasing before or after assembly of a heat exchanger core composed of a flat tube and a corrugated fin, masking except for a contact portion between the flat tube and the corrugated fin, and the flat tube and the corrugated fin. A step of spraying high pressure air after applying an adhesive to the contact portion of the substrate by using a spray method to remove excess adhesive around the adhesive portion, a step of putting a heat exchanger core in a curing furnace and curing the adhesive, Is disclosed.

  Patent Document 3 discloses a first step of expanding a flat tube after inserting a flat tube into a fin insertion portion, and a minute amount between an inner peripheral surface of the insertion portion and an outer peripheral surface of the flat tube. And a second step of filling the gap with a liquid adhesive from the radial direction of the flat tube by a dispenser nozzle.

JP 2012-73014 A Japanese Examined Patent Publication No. 6-12218 JP 2009-36428 A

  However, in the thing of patent document 1, since it has a heat insulation layer (adhesive) between a flat tube and a fin, there exists a possibility that heat loss may be large and heat transfer performance may fall.

  On the other hand, in the manufacturing method of the parallel flow type heat exchanger described in Patent Document 2, masking is performed except for the contact portion between the flat tube and the corrugated fin, and the contact portion between the flat tube and the corrugated fin is bonded using the spray method. In order to apply the agent, a large amount of coating liquid (adhesive) is required, and there is a concern that the adhesive is likely to be clogged between the fins, and there is a concern that heat loss is large and heat transfer performance is reduced. Furthermore, since a fine gap is inevitably generated between the contact portions between the flat tube and the corrugated fin, and an air layer exists in the gap, this causes heat loss, resulting in reduced heat transfer performance. There are concerns.

  Moreover, in the thing of patent document 3, an apparatus with a high application | coating precision is required, and there exists a concern that production efficiency is bad.

  This invention is made in view of the said situation, and makes it a subject to provide the manufacturing method of the parallel flow type heat exchanger which can aim at the improvement of a production efficiency, and can aim at the improvement of heat-transfer performance.

  In order to achieve the above object, a method of manufacturing a parallel flow heat exchanger according to the present invention includes a plurality of flat aluminum heat exchange tubes (hereinafter referred to as “parallel aluminum heat pipes”) disposed between a pair of aluminum header pipes. And a plurality of aluminum corrugated fins interposed between the flat tubes, and a parallel flow type heat exchanger manufacturing method comprising: The step of producing a heat exchanger core by alternately stacking and arranging tubes and corrugated fins, and the heat exchange in a state where the heat exchanger core is arranged so that the width direction of the flat tube is the vertical direction. A liquid thermoplastic and thermosetting adhesive application roll is brought into contact with the upper end surface of the vessel core, and the adhesive is filled in the contact portion between the flat tube and the corrugated fin. (Claim 1).

  By comprising in this way, after apply | coating (supply) to the contact part of the flat tube and corrugated fin in the upper end surface of the heat exchanger core arrange | positioned so that the width direction of a flat tube may become an up-down direction, application | coating (supply) The supplied adhesive is applied (supplied) to the contact portion between the lower flat tube and the corrugated fin by its own weight action and capillary action. Thereby, the air layer in the minute gap inevitably generated in the contact portion between the flat tube and the corrugated fin in the stacked state can be replaced with the adhesive layer.

  In this invention, the heat conductive filler is contained in the adhesive, and the amount of the heat conductive filler is 5% to 60% when the total value of the adhesive and the heat conductive filler is 100%. (Claim 2).

  The reason why the heat conductive filler content is 5% to 60% when the total value of the adhesive and the heat conductive filler amount is 100% is that the heat conductive filler content is less than 5%. This is because it cannot contribute to improvement, and if the conductive filler exceeds 60%, the adhesive strength becomes insufficient.

  By comprising in this way, the heat-transfer performance of the part which joins a flat tube and a corrugated fin via an adhesive agent can be improved.

  Further, in the present invention, the step of filling the adhesive may be performed by bringing the coating roll into contact with the heat exchanger core in a state where the heat exchanger core is arranged so that the width direction of the flat tube is the vertical direction. Any method may be used as long as the adhesive can be applied (supplied) to the contact portion between the flat tube and the corrugated fin on the upper end surface of the vessel core. For example, in the step of filling the adhesive, the flexible application roll having the adhesive on the surface is brought into contact with one end of the upper end surface of the heat exchanger core conveyed by the conveying means. The heat exchanger core is conveyed by the conveying means, and is brought into contact with the entire area of the laminated portion of the flat tube and the corrugated fin from one end portion to the other end portion of the heat exchanger core. (Claim 3).

  By comprising in this way, while being able to apply | coat (supply) an adhesive agent efficiently, an adhesive agent can be apply | coated (supplied) equally to the contact part of a flat tube and a corrugated fin.

  Moreover, in this invention, it is preferable to further include the process of heating the said heat exchanger core and solidifying the said adhesive agent after the process of filling the said adhesive agent (Claim 4).

  By comprising in this way, the adhesive agent with which the contact part of the flat tube and the corrugated fin was solidified can be solidified, and joining of a flat tube and a corrugated fin can be ensured.

  According to this invention, since it is configured as described above, the following effects can be obtained.

  (1) According to the invention described in claim 1, liquid thermoplastic and thermosetting adhesive is attached to the upper end surface of the heat exchanger core disposed so that the width direction of the flat heat exchange tube is the vertical direction. Applying (supplying) the adhesive to the contact portion between the flat heat exchange tube and the corrugated fin by bringing the adhesive application roll into contact with the adhesive, the applied (supplied) adhesive is lowered by its own weight and capillary action. Is applied (supplied) to the contact portion between the flat heat exchange tube and the corrugated fin. Therefore, the air layer in the minute gap inevitably generated at the contact portion between the flat heat exchange tube and the corrugated fin in the stacked state can be replaced with the adhesive layer, so that the production efficiency can be improved. The heat transfer performance can be improved.

  (2) According to invention of Claim 2, in addition to said (1), the heat-transfer performance of the part which joins a flat heat exchange pipe and a corrugated fin through an adhesive agent can be improved.

  (3) According to the invention described in claim 3, since the adhesive can be evenly applied (supplied) to the contact portion between the flat heat exchange tube and the corrugated fin, the above (1) and (2) In addition, the production efficiency can be further improved, and the adhesive can be evenly applied (supplied) to the contact portion between the flat heat exchange tube and the corrugated fin.

  (4) According to the invention described in claim 4, in addition to the above (1) to (3), the adhesive filled in the contact portion between the flat heat exchange tube and the corrugated fin is further solidified to be flat. The joining of the heat exchange tube and the corrugated fin can be ensured.

It is a schematic block diagram which shows an example of the manufacturing apparatus which embodies the manufacturing method of the parallel flow type heat exchanger which concerns on this invention. It is a principal part side view which shows the state which makes an application roll contact the heat exchanger core in this invention, and apply | coats (supplies) an adhesive agent. It is a principal part top view which shows the different state which makes an application roll contact the said heat exchanger core, and apply | coats (supplies) an adhesive agent. The principal part expansion perspective view (a) which shows the state of the adhesive agent apply | coated (supplied) to the contact part of the flat heat exchange tube and corrugated fin in this invention, and an adhesive agent in the contact part of a flat heat exchange tube and a corrugated fin It is a principal part enlarged plan view (b) which shows the joining state with which it filled. The side view (a) showing the contact state between the flat heat exchange tube and the corrugated fin (a), an enlarged view of the I part in (a), and the gap formed at the contact portion between the flat heat exchange tube and the corrugated fin. It is an enlarged view (c) which shows the state filled. It is a graph which shows the heat dissipation performance ratio with the presence or absence of application | coating of an adhesive agent. It is a graph which shows the thermal radiation amount of the state which changed the clearance gap amount of a corrugated fin and a flat heat exchange tube. It is a graph which shows the relationship between the clearance gap amount of a corrugated fin and a flat heat exchange pipe, and thermal resistance.

  EMBODIMENT OF THE INVENTION Below, the form for implementing this invention is demonstrated in detail based on an accompanying drawing.

  A parallel flow type heat exchanger (hereinafter referred to as a heat exchanger) in the present invention is disposed between a pair of header pipes 1a and 1b made of aluminum (including an aluminum alloy) as shown in FIG. Flat heat exchange tubes 2 (hereinafter referred to as flat tubes 2) made of a plurality of aluminum (including aluminum alloy), and corrugated fins made of a plurality of aluminum (including aluminum alloys) interposed between the flat tubes 2 3 and is joined via an adhesive 5 by a manufacturing method according to the present invention described later.

  The upper and lower opening ends of both header pipes 1a and 1b are closed by an aluminum end cap (not shown), the side surface on the upper end side of one header pipe 1a and the side surface on the lower end side of the other header pipe 1b. A refrigerant inflow pipe and a refrigerant outflow pipe (not shown) are connected to each. In addition, a plurality of refrigerant flow paths 2a parallel to each other are defined in the flat tube 2 (see FIG. 4), and a plurality of louvers 3a parallel to each other along the width direction of the flat tube 2 are formed in the corrugated fins 32. It stands up (see FIG. 5A).

  The adhesive 5 is made of, for example, a liquid thermoplastic and thermosetting material mainly composed of an epoxy resin.

  In order to improve the heat transfer performance at the joint between the flat tube 2 and the corrugated fin 3, it is preferable to mix a heat conductive filler in the adhesive 5.

  In this case, powder such as silica, alumina, aluminum, aluminum nitride, boron nitride, diamond or the like can be used as the thermally conductive filler.

  The content of the heat conductive filler in the adhesive 5 is that the amount of the heat conductive filler is 5% to 60% when the total value of the adhesive 5 and the heat conductive filler is 100%. preferable. The reason is that if the thermally conductive filler is less than 5%, it cannot contribute to the improvement of the heat transfer performance, and if the conductive filler exceeds 60%, the adhesive strength becomes insufficient.

  Thus, by mixing a heat conductive filler in the adhesive 5, the heat transfer performance of the part which joins the flat tube 2 and the corrugated fin 3 through the adhesive 5 can be improved.

  Next, an example of a manufacturing apparatus that embodies the manufacturing method according to the present invention will be described. As shown in FIG. 1, the manufacturing apparatus includes a transport conveyor 10 that is a transport means for transporting the heat exchanger core 4 in a state where the heat exchanger core 4 is arranged so that the width direction of the flat tube 2 is the vertical direction. Adhesive supply means 20 having an application roll 21 for applying (supplying) the adhesive 5 to the upper end surface of the heat exchanger core 4 conveyed by the conveyor 10 and the adhesive applied to the heat exchanger core 4 And a heating furnace 30 which is a heating means for heating and solidifying the agent 5.

  The adhesive supply means 20 is in contact with a tank 24 for storing a liquid thermoplastic and thermosetting adhesive 5 and an outlet 25 provided at one end of the lower portion of the tank 24. And a rollable coating roll 21 that receives the adhesive 5 held in the back roll 23 in contact with the back roll 23 and holds it on the surface. Yes.

  In this case, the back roll 23 and the application roll 21 are meshed between gears mounted on respective rotary shafts (not shown), or a timing belt that is stretched over a pulley mounted on the rotary shaft, It is configured to rotate (roll) in opposite directions by a transmission mechanism (not shown) including a drive motor. The rotation direction of the coating roll 21 is set to the same direction as the transport direction of the heat exchanger core 4 transported by the transport conveyor 10.

  The dimension in the longitudinal direction of the coating roll 21 is formed to a length including at least the flattened tube 2 and the outermost end of the corrugated fin 3 to be laminated. Further, as shown in FIG. 2, a surface layer 22 made of a flexible material made of, for example, chemical fiber, felt, sponge or the like is formed on the surface of the coating roll 21. The thickness T1 of the surface layer 22 is formed to be larger than the step T2 between the header pipes 1a and 1b and the flat tube 2 in the heat exchanger core 4.

  By forming the surface layer 22 of the coating roll 21 as described above, the coating roll 21 is rolled while the coating roll 21 is in contact with the upper end surface of the heat exchanger core 4 transported by the transport conveyor 10. The header in the heat exchanger core 4 when the adhesive 5 is applied (supplied) to the entire area of the laminated portion of the flat tube 2 and the corrugated fin 3 from one end portion to the other end portion of the heat exchanger core 4 while moving. It is possible to follow the unevenness of the step T2 between the pipes 1a, 1b and the flat tube 2 and the upper end surface (application surface) of the heat exchanger core 4.

  In addition, by forming the surface layer 22 of the coating roll 21 as described above, the flat tube 2 and the corrugated fin 3 constituting the heat exchanger core 4 can be formed even if vibration occurs during the transportation of the heat exchanger core 4. Scratches, dents and the like can be prevented.

  The adhesive 5 applied (supplied) to the upper end surface of the heat exchanger core 4 by the application roll 21 is applied (supplied) to the contact portion between the flat tube 2 and the corrugated fin 3 below by its own weight and capillary action. (See FIG. 4). Moreover, as shown in FIG. 5, the air layer 7 in the minute gap 6 inevitably generated at the contact portion between the flat tube 2 and the corrugated fin 3 in the stacked state can be replaced with an adhesive layer.

  The heating furnace 30 includes a heater (not shown) in a furnace body 31 that houses the heat exchanger core 4, and heat exchange in which the adhesive 5 transported by the transport conveyor 10 is applied (supplied). In a state where the vessel core 4 is conveyed and accommodated in the furnace body 31, the contact portion between the flat tube 2 and the corrugated fin 3 and the gap 6 are heated at a temperature at which the adhesive 5 is solidified, for example, 100 ° C. or more for 5 minutes or more. The adhesive 5 filled in can be solidified.

  In the manufacturing apparatus configured as described above, it is preferable to control the driving of the conveyor 10, the driving of the coating roll 21 in the adhesive supply means 20, and the driving of the heating furnace 30. For example, when the heat exchanger core 4 transported by the transport conveyor 10 reaches a position immediately below or near the application roll 21 of the adhesive supply means 20, it is detected by a sensor (not shown), and the detection signal Is transmitted to the transmission mechanism of the back roll 23 and the application roll 21 to start driving, and the adhesive 5 held in the surface layer 22 of the application roll 21 is transferred to the upper end surface (application surface) of the heat exchanger core 4. Apply (supplied). Further, when the heat exchanger core 4 coated with the adhesive 5 is conveyed to the heating furnace 30, it is detected by a sensor (not shown), and the detection signal is transmitted to the drive unit of the heating furnace 30, The heat exchanger core 4 conveyed and accommodated in the heating furnace 30 is heated at a temperature at which the adhesive 5 solidifies, for example, at 100 ° C. or more for 5 minutes or more, and the contact portion and the gap 6 between the flat tube 2 and the corrugated fin 3. Then, the adhesive 5 filled in is solidified, and then the conveyor 10 is driven to carry out the heat exchanger core 4 from the heating furnace 30.

  Next, a method for manufacturing a parallel flow heat exchanger according to the present invention will be described with reference to FIG.

  First, the flat tubes 2 and the corrugated fins 3 are alternately stacked between the pair of header pipes 1a and 1b to produce the heat exchanger core 4 (heat exchanger core production step).

  Next, the heat exchanger core 4 is arranged (placed) on the conveyor 10 so that the width direction of the flat tube 2 is the vertical direction, and then the conveyor 10 is driven so that the heat exchanger core 4 is It conveys to the adhesive agent supply means 20 side (heat exchanger core arrangement | positioning / conveyance process). At this time, the heat exchanger core 4 is arranged so that one of the header pipes 1a and 1b is positioned in the transport direction (see FIGS. 1 and 3A). In addition, as shown in FIG.3 (b), as for the arrangement | positioning of the heat exchanger core 4, you may position both header pipes 1a and 1b in parallel along a conveyance direction.

  When the heat exchanger core 4 is transported to the adhesive supply means 20 by the transport conveyor 10, the transmission mechanism of the back roll 23 and the application roll 21 of the adhesive supply means 20 is driven, so that the application roll 21 is the heat exchanger. It rotates (rolls) in the same direction as the conveying direction of the core 4. Thereby, the flat tube 2 and the corrugated fin 3 from the one end of the upper end surface of the heat exchanger core 4 to which the coating roll 21 having the adhesive 5 on the surface layer 22 is conveyed by the conveyor 10 to the other end. The adhesive 5 is applied (supplied) to the contact portion between the flat tube 2 and the corrugated fin 3 (adhesive filling step).

  In the adhesive filling process, the adhesive 5 applied (supplied) to the upper end surface of the heat exchanger core 4 is applied (supplied) to the contact portion between the flat tube 2 and the corrugated fin 3 below by its own weight action and capillary action. (See FIG. 4). Further, as shown in FIGS. 5B and 5C, the air layer 7 in the minute gap 6 inevitably generated at the contact portion between the flat tube 2 and the corrugated fin 3 in the stacked state is used as an adhesive layer. Replace.

  The heat exchanger core 4 to which the adhesive 5 has been applied (supplied) as described above is transported by the transport conveyor 10 and accommodated in the heating furnace 30, and the temperature at which the adhesive 5 is solidified, for example, 100 ° C. or higher. And the adhesive 5 filled in the contact portion and the gap 6 between the flat tube 2 and the corrugated fin 3 is solidified (adhesive solidification step). After the adhesive 5 is solidified, the conveyor 10 is driven to carry out the heat exchanger core 4 from the heating furnace 30 and the operation is completed.

  According to the manufacturing method of the above embodiment, the liquid thermoplastic and thermosetting adhesive 5 is applied to the upper end surface of the heat exchanger core 4 arranged so that the width direction of the flat tube 2 is the vertical direction. By applying (supplying) the adhesive 5 to the contact portion between the flat tube 2 and the corrugated fin 3 by bringing the roll 21 into contact, the applied (supplied) adhesive 5 can be applied to the lower flat tube by its own weight action and capillary action. 2 is applied (supplied) to the contact portion between the corrugated fin 3 and the corrugated fin 3. Therefore, as shown in FIGS. 5B and 5C, the air layer 7 in the minute gap 6 inevitably generated in the contact portion between the flat tube 2 and the corrugated fin 3 in the stacked state is used as an adhesive layer. Since it can be replaced, the production efficiency can be improved and the heat transfer performance can be improved. In addition, in FIG.5 (b), (c), the arrow shows a heat-transfer state.

  Moreover, the heat conductive filler is contained in the adhesive 5 so that the heat conductive filler amount is 5% to 60% when the total value of the adhesive 5 and the heat conductive filler amount is 100%. Thereby, the heat transfer performance of the part which joins the flat tube 2 and the corrugated fin 3 through the adhesive agent 5 can be improved.

  Further, the application roll 21 contacts the entire area of the laminated portion of the flat tube 2 and the corrugated fin 3 from one end of the upper end surface of the heat exchanger core 4 conveyed by the conveyor 10 to the other end so as to be able to roll. Then, by applying (supplying) the adhesive 5 to the contact portion between the flat tube 2 and the corrugated fin 3, the adhesive can be evenly applied (supplied) to the contact portion between the flat tube 2 and the corrugated fin 3. Therefore, the production efficiency can be improved, and the adhesive can be evenly applied (supplied) to the contact portion between the flat tube 2 and the corrugated fin 3.

  Next, an evaluation test of the heat radiation performance of the parallel flow type heat exchanger manufactured by the manufacturing method according to the present invention will be described.

<Parallel flow heat exchanger for evaluation test>
Size: Width 120mm x Height 116mm x Depth 13.85mm
Flat tube: thickness 1.93 mm x width 13.85 mm x 13 fins: plate thickness 0.1 mm x height 7.9 mm x 12 fins pitch: 1.3 mm

<Test conditions>
Circulating fluid: Warm water (pure water)
Temperature difference between hot water and air: 30 ° C

<Heat dissipation calculation formula>
Qw = Cpw × yw × Fw × (θwi−θwo)
Where, Qw: Warm water heat dissipation (W), Cpw: Constant pressure specific heat of hot water {kJ / (kg · ° C)}
yw: specific weight of warm water (kg / m ³ ), Fw: flow rate (m ³ / h)
θwi: hot water inlet side temperature (° C.), θwo: hot water outlet side temperature (° C.).

  In the said heat exchanger, since the adhesive agent 5 is apply | coated to the whole corrugated fin, there exists a concern about the influence on heat dissipation performance. Then, when the above conditions were the same and a brazed product (thickness of 5 μm or less) {no coating} having no effect of the gap 6 was used to evaluate the heat dissipation performance with and without coating, it is shown in FIG. The result was obtained.

  As a result of the evaluation, it was found that even if the adhesive 5 was applied to the entire corrugated fin, the amount of heat release was not affected. This is because only the surface in contact with the coating roll 21 (the upper end surface of the heat exchanger core 4) is applied to the entire corrugated fin, and therefore on the back side (the lower end side of the heat exchanger core 4). This is because the adhesive 5 flows only as much as necessary for joining.

  Further, when the influence on the thermal performance exerted by the gap 6 between the corrugated fin 3 and the flat tube 2 is examined, the relationship between the heat radiation amount (%) when the gap amount between the corrugated fin 3 and the flat tube 2 is changed is shown in FIG. The relationship between the corrugated fin 3 and the flat tube 2 and the thermal resistance (%) is as shown in FIG.

  As shown in FIG. 7, when the gap 6 between the corrugated fin 3 and the flat tube 2 is increased, the heat dissipation amount is reduced. This is because the thermal resistance increases due to the influence of the air layer 7 (see FIG. 5B) existing in the gap 6.

  From the above, a sufficient heat dissipation performance ratio can be obtained by filling the adhesive 6 in the gap 6 generated in the contact portion between the flat tube 2 and the corrugated fin 3.

1a, 1b Header pipe 2 Flat tube (flat heat exchange tube)
3 Corrugated fin 4 Heat exchanger core 5 Adhesive 6 Gap 7 Air layer 10 Conveyor (conveying means)
20 Adhesive supply means 21 Application roll 22 Surface layer 30 Heating furnace T1 Surface layer 22 thickness T2 Step difference between header pipes 1a, 1b and flat tube 2

Claims (4)

A plurality of parallel aluminum flat heat exchange tubes disposed between a pair of aluminum header pipes, and a plurality of aluminum corrugated fins interposed between the flat heat exchange tubes. A method for producing a parallel flow heat exchanger comprising:
A step of alternately laminating and arranging the flat heat exchange tubes and corrugated fins between the pair of header pipes to produce a heat exchanger core;
For application of liquid thermoplastic and thermosetting adhesive to the upper end surface of the heat exchanger core in a state where the heat exchanger core is arranged so that the width direction of the flat heat exchange tube is the vertical direction. Filling the adhesive into the contact portion between the flat heat exchange tube and the corrugated fin by bringing a roll into contact;
The manufacturing method of the parallel flow type heat exchanger characterized by including. In the manufacturing method of the parallel flow type heat exchanger according to claim 1,
That the heat conductive filler content is contained in the adhesive, and the amount of the heat conductive filler is 5% to 60% when the total value of the adhesive and the amount of the heat conductive filler is 100%. A manufacturing method of the featured parallel flow heat exchanger. In the manufacturing method of the parallel flow type heat exchanger according to claim 1 or 2,
In the step of filling the adhesive, the flexible application roll having the adhesive on the surface is brought into contact with one end of the upper end surface of the heat exchanger core conveyed by a conveying means, The heat exchanger core is conveyed by a conveying means, and is brought into rolling contact with the entire area of the laminated portion of the flat heat exchange tube and the corrugated fin from one end portion to the other end portion of the heat exchanger core. A method for producing a parallel flow type heat exchanger. In the manufacturing method of the parallel flow type heat exchanger according to any one of claims 1 to 3,
The method for manufacturing a parallel flow heat exchanger, further comprising a step of heating the heat exchanger core to solidify the adhesive after the step of filling the adhesive.

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