JP5694282B2 - Corrugated fin and heat exchanger provided with the same - Google Patents

Description

  The present invention relates to a corrugated fin that radiates heat from a heat exchange medium and a heat exchanger including the corrugated fin in a heat exchanger such as a radiator, an oil cooler, and an aftercooler.

  For example, an engine, a radiator, a cooling fan device, and the like are installed in a predetermined arrangement in an engine room of a work vehicle such as a hydraulic excavator or a bulldozer. Then, the cooling fan device is driven to generate a flow of cooling air that passes through the radiator, thereby cooling the engine cooling water circulated between the engine and the radiator.

The radiator mainly includes an upper tank, a lower tank, a plurality of tubes, and fins.
The upper tank and the lower tank are connected by a plurality of tubes arranged at a predetermined interval. Thereby, the engine cooling water sent out from the engine is temporarily stored in the upper tank, is stored in the lower tank through a plurality of tubes, and is then returned to the engine.
The fins are arranged between adjacent tubes and are joined to the tubes by joining means such as brazing.

  As the fins, flat plate portions each having a pair of side edges facing each other and a pair of end sides facing each other, and joint portions connected to the side edges of the flat plate portions are alternately bent and formed in a corrugated shape. There are corrugated fins (see, for example, Patent Documents 1 to 3).

JP 2007-232246 A JP 2002-228379 A JP-A-9-155487

A corrugated fin is manufactured through a groove forming process and a corrugated forming process, for example.
The groove forming step is a step of forming a plurality of grooves on the plate surface by passing a strip-shaped thin plate drawn out from a thin plate coil between a pair of grooves for forming a groove, or by pressing using a press machine. .
The corrugating process is a process in which the strip-shaped thin plate after the groove forming process is passed between a pair of corrug forming rolls so that the flat plate portion and the joining portion are alternately bent in a corrugated shape. It is.

  By the way, as a groove | channel attached | subjected to a strip | belt-shaped thin plate by said groove | channel formation process, there exists a groove | channel extended in the direction where a pair of side edge of a flat plate part is arranged, for example. As another example, there is a groove extending in a direction in which the pair of end sides of the flat plate portion is arranged.

  By providing the flat plate portion with grooves extending in the direction in which the pair of side sides are arranged, the section modulus of the cut surface along the direction in which the pair of end sides is arranged can be increased. Thereby, the rigidity of a flat plate part can be improved with respect to the bending effect | action which brings a pair of side edge close. However, in this case, since the section modulus of the cut surface along the direction in which the pair of side sides is arranged cannot be increased, the rigidity of the flat plate portion is increased with respect to a bending action that brings the pair of end sides closer to each other. I can't.

  By providing the flat plate portion with grooves extending in the direction in which the pair of end sides are arranged, the section modulus of the cut surface along the direction in which the pair of side sides is arranged can be increased. Thereby, the rigidity of a flat plate part can be improved with respect to the bending action which makes a pair of edge | sides approach. However, in this case, since the section modulus of the cut surface along the direction in which the pair of end sides is arranged cannot be increased, the rigidity of the flat plate portion is increased with respect to a bending action that brings the pair of side sides closer to each other. I can't.

Therefore, the conventional corrugated fin has a problem that an unexpected part may be bent at the time of manufacture, more specifically, in the corrugating process, and the error of the shape dimension becomes large.
For this reason, when assembling a radiator core by alternately laminating corrugated fins and tubes, errors in the shape dimensions of the corrugated fins may cause warpage of the radiator core, making it difficult to improve product accuracy. There is a problem. Also, if you try to correct the corrugated fin shape error, it will take extra time and effort, and if you try to assemble the corrugated fin shape error so as to offset each other, advanced skills are required. There is a problem that production becomes difficult.

  The present invention has been made in view of the above-described problems, and can reliably prevent the occurrence of bending at an unexpected location during production, thereby improving product accuracy and facilitating production. It is an object of the present invention to provide a corrugated fin and a heat exchanger including the corrugated fin.

In order to achieve the above object, the corrugated fin according to the first aspect of the present invention comprises:
One flat plate portion having a pair of opposite side edges and a pair of opposite end sides, respectively, and a joint portion connected to the side edge of the one flat plate portion are alternately bent and formed in a corrugated shape. In the corrugated fin for the heat exchanger
The one flat plate portion includes a groove-like concave portion extending obliquely with respect to the pair of side sides on the surface thereof.
The groove-shaped recess has a first groove-shaped recess and a second groove-shaped recess,
The first groove-shaped recess extends obliquely in a direction from one side of the pair of sides to the other side, with a central portion in the direction in which the pair of sides is disposed, The second groove-shaped recess extends obliquely in a direction from the other side of the pair of sides to the one side, with a central portion in the direction in which the pair of sides is disposed,
In two directions, a direction in which the pair of side sides are arranged and a direction in which the pair of end sides are arranged, at least one concave portion is provided at an arbitrary cut surface.

In the first invention, it is preferable that the first groove-like recess and the second groove-like recess are continuous in a V shape in a plan view when one end side of the flat plate portion is faced up ( Second invention).

The corrugated fin according to the third invention is
One flat plate portion having a pair of opposite side edges and a pair of opposite end sides, respectively, and a joint portion connected to the side edge of the one flat plate portion are alternately bent and formed in a corrugated shape. In the corrugated fin for the heat exchanger
The one flat plate portion includes a streak-like convex portion extending obliquely with respect to the pair of side sides on the surface thereof.
The streaky convex portion has a first streaky convex portion and a second streaky convex portion,
The first streak-shaped convex portion obliquely extends in a direction from one side of the pair of sides to the other side, with a central portion in a direction in which the pair of sides is disposed as a base point. The second streaky convex portion is inclined in a direction from the other side of the pair of sides to the side of the one side, with a central portion in the direction in which the pair of sides is disposed as a base point. Elongate,
In two directions, a direction in which the pair of side sides are arranged and a direction in which the pair of end sides are arranged, at least one convex portion is provided at an arbitrary cut surface.

In the third invention, the first streaky convex portion and the second streaky convex portion are continuous in a V shape in a plan view when one end side of the flat plate portion of the first is faced up. Preferred (fourth invention).

Next, the heat exchanger according to the fifth invention is
A corrugated fin according to any one of the first to fourth inventions is provided.

In the corrugated fin of the present invention, the flat plate portions each having a pair of side edges facing each other and a pair of end sides facing each other, and joint portions provided continuously on the side edges of the flat plate portion are alternately corrugated. It is assumed to be bent. On the surface of the flat plate portion of the corrugated fin, a groove-like concave portion or a streak-like convex portion that extends obliquely with respect to the pair of side sides is formed. Thereby, in two directions, the direction in which the pair of side sides are arranged and the direction in which the pair of end sides are arranged, at least one concave portion or convex portion is provided on the flat plate portion at an arbitrary cut surface. The section modulus of the cut surface along the direction in which the pair of side edges are arranged can be increased, and the section modulus of the cut surface along the direction in which the pair of side edges are arranged can be increased.
For this reason, the rigidity of the flat plate portion can be enhanced with respect to both the bending action for bringing the pair of side sides closer and the bending action for bringing the pair of end sides closer. In addition, since a large difference in rigidity can be provided between the flat plate portion and the joint portion, it can be easily and reliably bent at the boundary portion between the flat plate portion and the joint portion.
According to the corrugated fin of the present invention, it is possible to reliably prevent an unexpected portion from being bent at the time of manufacturing the corrugated fin, and to suppress an error in the shape dimension of the corrugated fin.
Moreover, according to the heat exchanger of this invention, there exists an effect that a product precision is improved and the manufacture becomes easy.

The whole perspective view of the radiator concerning a 1st embodiment of the present invention. Part X enlarged perspective view of FIG. Structure explanatory drawing (a) of the flat plate part seen from the Y arrow direction of FIG. 2, AA sectional view (b) of (a), BB sectional drawing (c) of (a), and (a) ) B'-B 'sectional view (d) Z arrow main part enlarged view of FIG. Manufacturing method explanatory drawing (a) of corrugated fin, state figure before corrugating (b), state figure after corrugating (c), and shape explanatory drawing of a flat surface, an exemplary view (d) of a planar shape and a curved surface shape Illustration (e) Explanatory drawing of the modification of the corrugated fin which concerns on 1st Embodiment Structure explanatory drawing (a) of the flat part of the corrugated fin which concerns on 2nd Embodiment, CC sectional view (b) of (a), DD sectional view (c) of (a), and (a) ) D'-D 'sectional view (d) Structural explanatory drawing (a) of the corrugated fin of the corrugated fin according to the third embodiment (a), a cross-sectional view taken along line EE of (a), a cross-sectional view taken along line FF (a), ) F'-F 'sectional view of () Structure explanatory drawing of flat plate part of corrugated fin according to fourth embodiment (a), GG sectional view (b) of (a) and HH sectional view (c) of (a) Structure explanatory drawing (a) of corrugated fin concerning 5th Embodiment (a), II sectional view taken on the line (b), and JJ sectional view taken on the line (c) (c) Structure explanatory drawing (a) of corrugated fin concerning 6th Embodiment (a), KK sectional view (b) of (a), and LL sectional view (c) of (a) Structural explanatory drawing (a) of the corrugated fin of the corrugated fin according to the seventh embodiment (a), MM sectional view (b), (a) M'-M 'sectional view (c), (A) NN sectional view (d) and (a) N'-N 'sectional view (e)

  Next, specific embodiments of the corrugated fin and the heat exchanger including the corrugated fin according to the present invention will be described with reference to the drawings. In the following, an example in which the present invention is applied to a radiator installed in an engine room of a work vehicle such as a hydraulic excavator or a bulldozer will be described. However, heat such as an oil cooler or an aftercooler having the same basic structure as the radiator is described. Needless to say, the present invention can also be applied to an exchanger.

[First Embodiment]
FIG. 1 is an overall perspective view of a radiator including a corrugated fin according to the first embodiment of the present invention.

<Description of the schematic structure of the radiator>
A radiator 1 shown in FIG. 1 is a device that dissipates heat obtained from an engine by engine coolant (heat exchange medium) circulated between the radiator 1 and an engine (not shown).
The radiator 1 mainly includes an upper tank 2, a lower tank 3, a tube 4, and a corrugated fin 5.
The upper tank 2 and the lower tank 3 are connected by a plurality of tubes 4. Thereby, the engine cooling water sent out from the engine can be temporarily stored in the upper tank 2, stored in the lower tank 3 through the plurality of tubes 4, and then returned to the engine.
The radiator core 6 is assembled by alternately stacking the tubes 4 and the corrugated fins 5.

<Description of tube>
As shown in FIG. 2, the tube 4 is formed of a flat tube member having an engine cooling water flow passage 4a therein.
A large number of tubes 4 are arranged with a predetermined pitch Pa in the width direction RW of the radiator 1 and with a predetermined gap S in the depth direction RD of the radiator 1.

<Overview of corrugated fin>
The corrugated fins 5 are arranged between the tubes 4 adjacent to each other in the width direction (RW) of the radiator 1. The corrugated fins 5 are formed by alternately bending the flat plate portions 5a and the joining portions 5b into a corrugated shape.

<Overview of flat plate>
The flat plate portion 5a has a pair of side edges 11 and 11 'facing each other in the width direction (RW) of the radiator 1 and a pair of end edges 12 and 12' facing each other in the depth direction (RD) of the radiator 1. It is a rectangular plate part.

<Description of groove-shaped recess in flat plate portion>
As shown in FIG. 3A, on the surface of the flat plate portion 5a, a plurality of groove-like recesses 13 are equally spaced at a predetermined pitch Pb in the direction (FD) in which the pair of end sides 12, 12 ′ are arranged. Is provided.
The groove-like recess 13 is linearly inclined in the direction from the one side 11 to the other side 11 ′ as it proceeds in the direction from the one end 12 to the other end 12 ′. It is an extending recess.
In the groove-like recesses 13 adjacent to each other, when viewed in the direction (FW) in which the pair of side edges 11, 11 ′ are arranged, the groove-like recesses 13 are arranged so that a part of the groove-like recesses 13 adjacent to each other overlap. The arrangement pitch Pb, the inclination angle, the length and width of the groove-like recess 13 are determined.
In addition, by providing the several groove-shaped recessed part 13 in the surface of the flat plate part 5a, the site | part between the groove-shaped recessed parts 13 adjacent to each other becomes the stripe-shaped convex part 14 relatively. Further, by providing a groove-shaped recess 13 on the surface of the flat plate portion 5a on the back surface of the flat plate portion 5a, a streak-shaped convex portion 15 corresponding to the groove-shaped recess 13 is obtained (see FIGS. 3B and 3C). ) Will be formed.

<Explanation of uneven portion of arbitrary cut surface of flat plate portion>
As shown in FIG. 3B, the flat plate portion 5a has a plurality of recesses 16 formed by a plurality of groove-like recesses 13 at an arbitrary cut surface in the direction (FD) in which the pair of end sides 12, 12 ′ are arranged. Will have. In other words, the flat plate portion 5a has a plurality of convex portions 17 and 18 formed by a plurality of line-like convex portions 14 and 15 at an arbitrary cut surface in the direction (FD) in which the pair of end sides 12 and 12 'are arranged. It will be.
Moreover, as shown in FIGS. 3C and 3D, the flat plate portion 5a is a recess formed by the groove-like recess 13 in an arbitrary cut surface in the direction (FW) in which the pair of side edges 11 and 11 ′ are arranged. 16 will be included. In other words, the flat plate part 5a has the convex parts 17 and 18 by the streak-like convex parts 14 and 15 in an arbitrary cut surface in the direction (FW) in which the pair of side edges 11 and 11 'are arranged. In addition, as shown in FIG. 3C, in the cross section taken along the line B-B of the flat plate portion 5a, there is one concave portion 16 due to the groove-shaped concave portion 13 or one convex portion 18 due to the streaky convex portion 15. As shown in FIG. 4D, in the cross section taken along line B′-B ′, there are two concave portions 16 due to the groove-shaped concave portions 13 or two convex portions 18 due to the line-shaped convex portions 15.

<Overview of the joint>
As shown in FIG. 4, the joint portion 5 b is a rectangular plate portion that is perpendicular to the flat plate portion 5 a and is thinner than the flat plate portion 5 a, and has a flat surface 20 that is joined to the tube 4. . The flat surface 20 has a planar shape parallel to the surface 21 of the tube 4.
Here, the flat surface 20 is inevitably compared with the concept of a completely flat surface having no undulations and the groove-shaped recess 13 at the time of groove forming for attaching the groove-shaped recess 13 to the flat plate portion 5a. It includes both the concept of a substantially flat surface with a negligible extremely shallow groove (unprocessed residue).

<Description of bonding between corrugated fin and tube>
The corrugated fin 5 and the tube 4 are joined by brazing using a brazing material 22 interposed between the flat surface 20 of the joint portion 5 b and the surface 21 of the tube 4.
Since the flat surface 20 of the joint portion 5b has a planar shape, the joint area and the thermal contact area with the tube 4 can be made larger than when the flat surface 20 has a curved surface shape or a square surface shape.
Since the joining area of the flat surface 20 of the joining part 5b and the surface 21 of the tube 4 can be taken large, the corrugated fin 5 and the tube 4 can be joined more firmly.
Since the thermal contact area between the flat surface 20 of the joint 5b and the surface 21 of the tube 4 can be increased, the heat of the engine coolant flowing in the tube 4 can be efficiently conducted from the tube 4 to the corrugated fins 5. Thus, the heat dissipation effect by the corrugated fins 5 can be further enhanced.

<Description of manufacturing method of corrugated fin>
Next, a method for manufacturing the corrugated fin 5 will be described below with reference to FIG. The manufacturing method of the corrugated fin 5 includes a groove forming step and a corrugated forming step.

<Description of groove forming process>
The groove forming step is a step of forming a plurality of groove-like recesses 13 on a plate surface of the corrugated fin material fed from the thin plate coil 30 through the strip-like thin plate 30a between the pair of first rolls 31, 31 ′.
On each outer peripheral surface of the pair of first rolls 31 and 31 ′, a plurality of uneven portions (not shown) corresponding to the plurality of groove-like recesses 13 to be attached to the strip-like thin plate 30 a are formed. When the pair of first rolls 31, 31 ′ are rotationally driven in the direction of the arrow in the figure, the strip-shaped thin plate 30 a is sandwiched between the pair of first rolls 31, 31 ′ and sent out downstream. At this time, a plurality of grooves are formed on the plate surface of the strip-shaped thin plate 30a by sandwiching the strip-shaped thin plate 30a between the concave portion of the first roll 31 on one side and the convex portion of the first roll 31 'on the other side. A concave portion 13 is provided.
In addition, the same some groove-shaped recessed part 13 can also be attached | subjected to the plate | board surface of the strip | belt-shaped thin plate 30a by the press work using a press machine.

<Description of corrugated molding process>
In the corrugate forming step, a pair of second rolls 32 and 32 are disposed on the downstream side of the first rolls 31 and 31 ′ with the strip-shaped thin plate 30 a fed out between the pair of first rolls 31 and 31 ′. In this step, the flat plate portions 5a and the joint portions 5b are alternately bent and formed in a corrugated shape.
A plurality of teeth (not shown) for bending and forming the strip-shaped thin plate 30a having a plurality of groove-like recesses 13 on the plate surface into a corrugated shape on the outer peripheral portions of the pair of second rolls 32 and 32 ' Are formed so as to be able to mesh with each other. When the pair of second rolls 32 and 32 'are rotationally driven in the direction of the arrow in the figure, the belt-like thin plate 30a is sandwiched between the pair of second rolls 32 and 32' and sent out downstream. At this time, the belt-like thin plate 30a is corrugated by sandwiching the belt-like thin plate 30a between the teeth of the second roll 32 on one side and the teeth on the second roll 32 'on the other side. It is designed to be bent.
As shown in FIG. 5B, a plurality of groove-like recesses 13 and a plurality of groove-like recesses 13 are formed on the strip-shaped thin plate 30a before being subjected to corrugation molding. There is a portion (a portion indicated by a symbol T arrow in the figure) without any uneven portion of the streaky convex portion 14. Then, corrugation is performed so that this portion becomes the joint portion 5b having the flat surface 20 (see FIG. 5C).
Here, in the present embodiment, the shape of the flat surface 20 is a planar shape as shown in FIG. 5D, but is not limited to this, and FIG. As shown, a curved shape is also included. By forming the flat surface 20 into a curved shape, stress concentration at the bent portion can be avoided.
Thus, the corrugated fins 5 obtained through the corrugating process are sandwiched between the tubes 4 adjacent to each other and joined to the tubes 4 by brazing.

<Description of Effects of First Embodiment>
In the corrugated fin 5 of the first embodiment, as shown in FIGS. 3B and 3C, the direction (FW) in which the pair of side edges 11, 11 ′ are arranged and the pair of end edges 12, 12. In two directions, i.e., the direction in which ′ is arranged (FD), the flat plate portion 5a is provided with the concave portions 16 formed by the groove-shaped concave portions 13 or the convex portions 17 and 18 formed by the line-shaped convex portions 14 and 15 at an arbitrary cut surface. Thereby, the section modulus of the cut surface along the direction (FD) in which the pair of end sides 12 and 12 'are arranged can be increased, and the direction in which the pair of side sides 11 and 11' are arranged (FW). The section modulus of the cut surface along the line can be increased. For this reason, the rigidity of the flat plate portion 5a can be enhanced with respect to both the bending action that brings the pair of side edges 11 and 11 'closer and the bending action that brings the pair of end edges 12 and 12' closer.
Further, the concave portion 16 by the groove-shaped concave portion 13 or the convex portions 17, 18 by the streak convex portions 14, 15 as provided in the flat plate portion 5a is not provided in the joint portion 5b. Thereby, a large difference in rigidity can be provided between the flat plate portion 5a and the joint portion 5b, and the boundary portion between the flat plate portion 5a and the joint portion 5b can be easily and reliably bent.
Therefore, it is possible to reliably prevent an unexpected portion from being bent at the time of manufacturing the corrugated fin 5, more specifically at the time of the corrugating process, and to suppress an error in the shape dimension of the corrugated fin 5. it can.
In the radiator 1 of the first embodiment, the radiator core 6 is assembled by alternately stacking the tubes 4 and the corrugated fins 5. Since the error in the shape and dimension of the corrugated fins 5 is kept small, the radiator core 6 is not warped, and the product accuracy can be increased. In addition, since the correction work of the shape dimension error of the corrugated fin 5 and the advanced skill for offsetting the errors are not required, the manufacture thereof is also facilitated.

<Description of Modification of First Embodiment>
6A to 6F are plan views of a flat plate portion 5a according to a modification of the corrugated fin 5 of the first embodiment.
In the corrugated fin 5 of the first embodiment, in two directions, a direction (FW) in which the pair of side edges 11 and 11 ′ are disposed and a direction (FD) in which the pair of end edges 12 and 12 ′ are disposed. The flat plate portion 5a is provided with at least one concave portion 16 by the groove-shaped concave portion 13 at an arbitrary cut surface. The configuration can be changed as appropriate without departing from the spirit of the configuration.
For example, as shown in FIG. 6A, a groove-like recess 13 </ b> A having a groove width larger than the groove-like recess 13 can be employed instead of the groove-like recess 13.
Further, as shown in FIG. 5B, the pitch of the arrangement of the groove-like recesses 13 can be changed to a pitch Pc smaller than Pb.
Further, as shown in FIG. 2C, the pitch of the groove-shaped recesses 13 can be set to two or more different pitches Pd and Pe.
Further, as shown in FIG. 4D, the groove-like recesses 13 and 13A having different groove widths can be alternately arranged.
Further, as shown in FIG. 5E, the one corresponding to the groove-shaped recess 13 may be configured by alternately arranging a plurality of groove-shaped recesses 13B having a shorter length than the groove-shaped recess 13. it can.
Moreover, the groove-shaped recessed part 13 is a direction which goes to the side edge 11 'of the other side from the side edge 11 of one side, as it goes to the direction which goes to the edge 12' of the other side from the edge 12 of the one side of the flat plate part 5a. Is a concave portion extending in a straight line obliquely, but a concave portion extending in the opposite direction, that is, as shown in FIG. A groove-like recess 13 </ b> C that extends linearly obliquely in a direction from the other side 11 ′ to the one side 11 as it proceeds in the direction toward 12 ′ can be employed.

[Second Embodiment to Seventh Embodiment]
Next, the corrugated fins 5A to 5F according to the second to seventh embodiments of the present invention will be sequentially described. In the following embodiments, the same or similar parts as those in the first embodiment are designated by the same reference numerals in the drawings, and detailed description thereof is omitted. In the following, the first embodiment is referred to as the first embodiment. The explanation will focus on the differences.

<Second Embodiment (see FIG. 7A): Explanation of groove-shaped recess in flat plate portion>
As shown in FIG. 7A, in the corrugated fin 5A of the second embodiment, the surface of the flat plate portion 5a has a predetermined pitch in the direction (FD) in which the pair of end sides 12, 12 ′ are arranged. A plurality of groove-like recesses 40 are provided at equal intervals in Pf.
The groove-shaped recess 40 is composed of a first groove-shaped recess 40a and a second groove-shaped recess 40b, and the first groove-shaped recess 40 in a plan view when the other side edge 12 'is turned up. 40a and the 2nd groove-shaped recessed part 40b are recessed parts of the shape which continues in V shape.
The first groove-shaped recess 40a is formed from the end 12 on one side to the end 12 'on the other side, starting from the central portion in the direction (FW) in which the pair of sides 11 and 11' of the flat plate portion 5a is arranged. The concave portion extends linearly obliquely in the direction from the side 11 on one side to the side 11 'on the other side as it goes in the direction toward it.
The second groove-shaped recess 40b is formed from the end 12 on one side to the end 12 'on the other side, starting from the central portion in the direction (FW) in which the pair of sides 11 and 11' of the flat plate portion 5a is arranged. The concave portion extends linearly and obliquely in the direction from the other side 11 ′ to the one side 11 as it advances in the direction toward the other side.

<Second embodiment (see FIGS. 7B, 7C, and 7D)): Description of uneven portions of an arbitrary cut surface of a flat plate portion>
As shown in FIG. 7B, the flat plate portion 5a has a plurality of concave portions 41 formed by a plurality of groove-shaped concave portions 40 at an arbitrary cut surface in a direction (FD) in which the pair of end sides 12, 12 ′ are arranged. Will have. In other words, the flat plate portion 5a has a plurality of convex portions 44 and 45 formed by a plurality of streaky convex portions 42 and 43 on an arbitrary cut surface in the direction (FD) in which the pair of end sides 12 and 12 'are arranged. It will be.
Moreover, as shown in FIGS. 7C and 7D, the flat plate portion 5a is a concave portion formed by the groove-shaped concave portion 40 at an arbitrary cut surface in the direction (FW) in which the pair of side edges 11 and 11 ′ are arranged. 41. In other words, the flat plate portion 5a has the convex portions 44 and 45 formed by the streak-like convex portions 42 and 43 on an arbitrary cut surface in the direction (FW) in which the pair of side edges 11 and 11 'are arranged. As shown in FIG. 7 (c), in the cross section taken along the line D-D of the flat plate portion 5a, there is one concave portion 41 due to the groove-shaped concave portion 40 or one convex portion 45 due to the streaky convex portion 43. As shown in FIG. 7D, there are two concave portions 41 due to the groove-shaped concave portions 40 or two convex portions 45 due to the line-shaped convex portions 43 in the D′-D ′ line cross section.

<Third embodiment (see FIG. 8A): Explanation of groove-shaped recess in flat plate portion>
As shown in FIG. 8A, in the corrugated fin 5B of the third embodiment, a predetermined pitch in the direction (FD) in which the pair of end sides 12 and 12 'are arranged on the surface of the flat plate portion 5a. A plurality of groove-like recesses 46 are provided at equal intervals in Pg.
The groove-like recess 46 is a recess that is bent in an arc shape so as to bulge toward the end 12 on the one side between the side 11 on one side and the side 11 'on the other side.

<Third embodiment (see FIGS. 8B, 8C, and 8D): Description of uneven portions of an arbitrary cut surface of a flat plate portion>
As shown in FIG. 8B, the flat plate portion 5a has a plurality of recesses 47 formed by a plurality of groove-like recesses 46 at an arbitrary cut surface in the direction (FD) in which the pair of end sides 12, 12 ′ are arranged. Will have. In other words, the flat plate portion 5a has a plurality of convex portions 50 and 51 by a plurality of streak-like convex portions 48 and 49 on an arbitrary cut surface in the direction (FD) in which the pair of end sides 12 and 12 'are arranged. It will be.
Further, as shown in FIGS. 8C and 8D, a concave portion 47 formed by a groove-shaped concave portion 46 on an arbitrary cut surface in a direction (FW) in which the flat plate portion 5a and the pair of side edges 11 and 11 ′ are arranged. Will have. In other words, in any cut surface in the direction (FW) in which the flat plate portion 5a and the pair of side edges 11 and 11 'are arranged, the convex portions 50 and 51 by the streaky convex portions 48 and 49 are provided. As shown in FIG. 8C, in the cross section taken along the line FF of the flat plate portion 5a, there is one concave portion 47 due to the groove-shaped concave portion 46 or one convex portion 51 due to the streaky convex portion 49. As shown in FIG. 4D, in the cross section taken along the line F′-F ′, there are two concave portions 47 due to the groove-shaped concave portions 46 or two convex portions 51 due to the line-shaped convex portions 49.

<Fourth Embodiment (see FIG. 9A): Explanation of groove-shaped recess in flat plate portion>
As shown in FIG. 9A, in the corrugated fin 5C of the fourth embodiment, a predetermined pitch in the direction (FD) in which the pair of end sides 12 and 12 'are arranged on the surface of the flat plate portion 5a. A plurality of groove-like recesses 52 are provided at equal intervals in Ph.
The groove-like recess 52 is constituted by a first groove-like recess 52a, a second groove-like recess 52b, a third groove-like recess 52c, and a fourth groove-like recess 52d, and an end 12 ′ on the other side of the flat plate portion 5a. When viewed from above, the first groove-like recess 52a, the second groove-like recess 52b, the third groove-like recess 52c, and the fourth groove-like recess 52d are recesses that are continuous in a W-shape. .
The first groove-shaped recess 52a is formed on the one side with the intermediate portion between the central portion in the direction (FW) in which the pair of side edges 11, 11 'of the flat plate portion 5a are arranged and the side edge 11' on the other side as a base point. The concave portion extends linearly and obliquely in the direction from the side 11 on one side toward the side 11 'on the other side as it proceeds in the direction from the side 12 to the side 12' on the other side.
The second groove-shaped recess 52b is formed on one side with the intermediate portion between the central portion in the direction (FW) in which the pair of side edges 11, 11 'of the flat plate portion 5a are arranged and the other side edge 11' as a base point. The concave portion extends linearly and obliquely in the direction from the other side 11 ′ to the one side 11 as it proceeds in the direction from the side 12 to the other side 12 ′.
The third groove-like recess 52c is an end on one side, with an intermediate portion between the central portion in the direction (FW) in which the pair of side edges 11, 11 'of the flat plate portion 5a are arranged and the side edge 11 on one side as a base point. The concave portion extends linearly obliquely in the direction from the side 11 on one side toward the side 11 'on the other side as it proceeds in the direction from the side 12 toward the other side 12'.
The fourth groove-like recess 52d has an end on one side, with an intermediate portion between the central portion in the direction (FW) in which the pair of side edges 11 and 11 'of the flat plate portion 5a are disposed and the side edge 11 on one side as a base point. The concave portion extends linearly obliquely in the direction from the side 11 ′ on the other side toward the side 11 on the one side as it proceeds in the direction from the side 12 toward the other side 12 ′.

<4th Embodiment (refer FIG.9 (b) (c)): Description of the uneven | corrugated | grooved part of the arbitrary cut surfaces of a flat plate part>
As shown in FIG. 9B, the flat plate portion 5a has a plurality of recesses 53 formed by a plurality of groove-like recesses 52 at an arbitrary cut surface in the direction (FD) in which the pair of end sides 12, 12 ′ are arranged. Will have. In other words, the flat plate portion 5a has a plurality of convex portions 56 and 57 formed by a plurality of streak-like convex portions 54 and 55 on an arbitrary cut surface in the direction (FD) in which the pair of end sides 12 and 12 'are arranged. It will be.
Further, as shown in FIG. 9C, the flat plate portion 5a has two concave portions 53 formed by the groove-shaped concave portions 52 on an arbitrary cut surface in the direction (FW) in which the pair of side edges 11, 11 ′ are arranged. You will have more than one. In other words, the flat plate portion 5a has two or more convex portions 56, 57 formed by the streak-like convex portions 54, 55 on an arbitrary cut surface in the direction (FW) in which the pair of side edges 11, 11 ′ are arranged. become.

<Fifth Embodiment (see FIG. 10A): Explanation of groove-shaped recess in flat plate portion>
As shown in FIG. 10 (a), in the corrugated fin 5D of the fifth embodiment, a predetermined pitch is provided on the surface of the flat plate portion 5a in the direction (FW) in which the pair of side edges 11, 11 ′ are arranged. A plurality of groove-like recesses 58 are provided at equal intervals in Pi.
The groove-like recess 58 is constituted by a first groove-like recess 58a, a second groove-like recess 58b, a third groove-like recess 58c, and a fourth groove-like recess 58d, and the side 11 'on the other side of the flat plate portion 5a is formed. When viewed from above, the first groove-like recess 58a, the second groove-like recess 58b, the third groove-like recess 58c, and the fourth groove-like recess 58d are recesses having a shape that continues in an M shape. .
The first groove-like recess 58a is an end on the other side with the intermediate portion between the central portion in the direction (FD) in which the pair of end sides 12, 12 'of the flat plate portion 5a are arranged and the one end side 12 as a base point. The concave portion extends linearly obliquely in the direction from the side 11 'on the other side toward the side 11 on the one side as it proceeds in the direction from the side 12' to the one side 12 on the one side.
The second groove-shaped recess 58b has one end on the basis of an intermediate portion between the center portion in the direction (FD) in which the pair of end sides 12 and 12 'of the flat plate portion 5a are arranged and the one end side 12. The concave portion extends linearly obliquely in the direction from the side 11 ′ on the other side toward the side 11 on the one side as it proceeds in the direction from the side 12 toward the other side 12 ′.
The third groove-like recess 58c is based on an intermediate portion between the center portion in the direction (FD) in which the pair of end sides 12, 12 'of the flat plate portion 5a are arranged and the other end side 12', and The concave portion extends linearly obliquely in the direction from the other side 11 ′ to the one side 11 as it proceeds in the direction from the end 12 ′ to the one side 12.
The fourth groove-like concave portion 58d is formed on the one side with the intermediate portion between the center portion in the direction (FD) in which the pair of side edges 12, 12 'of the flat plate portion 5a are arranged and the other side edge 12' as a base point. The concave portion extends linearly and obliquely in the direction from the other side 11 ′ to the one side 11 as it proceeds in the direction from the side 12 to the other side 12 ′.

<Fifth embodiment (see FIGS. 10B and 10C): Description of uneven portions of an arbitrary cut surface of a flat plate portion>
As shown in FIG. 10B, the flat plate portion 5a has two or more concave portions 59 formed by the groove-shaped concave portions 58 on an arbitrary cut surface in the direction (FD) in which the pair of end sides 12 and 12 'are arranged. Will have. In other words, the flat plate portion 5a has two or more convex portions 62 and 63 formed by the streak-shaped convex portions 60 and 61 on an arbitrary cut surface in the direction (FD) in which the pair of end sides 12 and 12 'are arranged. become.
Further, as shown in FIG. 10C, the flat plate portion 5a has a plurality of groove-like recesses 58 on a given cut surface in the direction (FW) in which the pair of side edges 11, 11 ′ are arranged. A recess 59 is provided. In other words, the flat plate portion 5a has a plurality of convex portions 62 and 63 formed by a plurality of streak-like convex portions 60 and 61 on an arbitrary cut surface in the direction (FW) in which the pair of side edges 11 and 11 ′ are arranged. It will be.

<6th Embodiment (refer Fig.11 (a)): Description of the groove-shaped recessed part of a flat plate part>
As shown in FIG. 11A, in the corrugated fin 5E of the sixth embodiment, a predetermined pitch in the direction (FD) in which the pair of end sides 12 and 12 'are arranged on the surface of the flat plate portion 5a. A plurality of first groove-like recesses 64 and second groove-like recesses 65 are provided at equal intervals in Pj.
The first groove-like recess 64 is inclined in the direction from the one side 11 to the other side 11 ′ as it proceeds in the direction from the one side 12 to the other side 12 ′. It is a recessed part extended linearly.
As the second groove-shaped recess 65 advances in the direction from the one side edge 12 toward the other side edge 12 ′, the second groove-shaped recess 65 is inclined in the direction from the other side edge 11 ′ toward the one side edge 11. It is a recessed part extended linearly.
The plurality of first groove-like recesses 64 and the plurality of second groove-like recesses 65 intersect with each other and are arranged in a mesh shape as a whole.

<6th Embodiment (refer FIG.11 (b) (c)): Description of the uneven | corrugated | grooved part of the arbitrary cut surfaces of a flat plate part>
As shown in FIG. 11 (b), the flat plate portion 5a has a plurality of groove-like recesses 64, 65 on an arbitrary cut surface in the direction (FD) in which the pair of end sides 12, 12 ′ are arranged. A recess 66 is provided. In other words, the flat plate portion 5a has a plurality of convex portions 69 and 70 formed by a plurality of streak-shaped convex portions 67 and 68 at an arbitrary cut surface in the direction (FD) in which the pair of end sides 12 and 12 'are arranged. It will be.
Further, as shown in FIG. 11C, the flat plate portion 5a is formed by a plurality of groove-like recesses 64 and 65 at an arbitrary cut surface in the direction (FW) in which the pair of side sides 11 and 11 ′ are arranged. A plurality of recesses 66 are provided. In other words, the flat plate portion 5a has a plurality of convex portions 69 and 70 formed by a plurality of streak-shaped convex portions 67 and 68 on an arbitrary cut surface in the direction (FW) in which the pair of side edges 11 and 11 'are arranged. It will be.

<Seventh embodiment (see FIG. 12A): Explanation of groove-shaped recess in flat plate portion>
As shown in FIG. 12A, in the corrugated fin 5F of the seventh embodiment, a first groove-like recess 71 and a second groove-like recess 72 are provided on the surface of the flat plate portion 5a. Yes.
The first groove-like recess 71 has a corner of intersection between the side 11 on one side and the end 12 'on the other side and an angle of intersection between the side 11' on the other side and the end 12 on the one side. It is a recessed part extended linearly between parts.
The second groove-like recess 72 has a corner of intersection between the side 11 on one side and the end 12 on one side, and an angle of intersection between the side 11 'on the other side and the end 12' on the other side. It is a recessed part extended linearly between parts.
The first groove-like recess 71 and the second groove-like recess 72 intersect with each other and are arranged in an X shape.

<7th Embodiment (refer FIG. 12 (b) (c) (d) (e)): Description of the uneven | corrugated | grooved part of the arbitrary cut surfaces of a flat plate part>
As shown in FIGS. 12B and 12C, the flat plate portion 5a is a recess formed by the groove-like recesses 71 and 72 at an arbitrary cut surface in the direction (FD) in which the pair of end sides 12 and 12 ′ are arranged. 73, 74. In other words, the flat plate portion 5a has the convex portions 77 and 78 formed by the streak-shaped convex portions 75 and 76 on an arbitrary cut surface in the direction (FD) in which the pair of end sides 12 and 12 'are arranged. As shown in FIG. 12B, in the cross section taken along the line MM of the flat plate portion 5a, one recess 73 (74) by the groove-like recess 71 (72) or 1 by the stripe-like protrusion 75 (76). Although there are two convex portions 77 (78), as shown in FIG. 5C, in the cross section taken along the line M'-M ', the two concave portions 73 (74) or the streak shape by the groove-shaped concave portion 71 (72). There are two convex portions 77 (78) due to the convex portions 75 (76).
Moreover, as shown in FIGS. 12D and 12E, the flat plate portion 5a has groove-like recesses 71 and 72 at an arbitrary cut surface in the direction (FW) in which the pair of side edges 11 and 11 ′ are arranged. It will have the recessed parts 73 and 74 by. In other words, the flat plate portion 5a has the convex portions 77 and 78 formed by the streak-shaped convex portions 75 and 76 at an arbitrary cut surface in the direction (FW) in which the pair of side edges 11 and 11 'are arranged. As shown in FIG. 12 (d), in the cross section along the line NN of the flat plate portion 5a, one recess 73 (74) by the groove-like recess 71 (72) or 1 by the stripe-like protrusion 75 (76). Although there are two convex portions 77 (78), as shown in FIG. 5E, in the N′-N ′ line cross section, the two concave portions 73 (74) or the streak shape by the groove-shaped concave portions 71 (72). There are two convex portions 77 (78) due to the convex portions 75 (76).

<Description of Effects of Second Embodiment to Seventh Embodiment>
In any of the corrugated fins 5A to 5F of the second to seventh embodiments, the direction (FW) in which the pair of side edges 11 and 11 ′ are arranged and the pair of end sides 12 and 12 ′ are arranged. In the two directions, ie, the direction (FD), the concave portions 41, 47, 53, 59, 66, 73 by at least one groove-shaped concave portion 40, 46, 52, 58, 64, 65, 71, 72 at an arbitrary cut surface. , 74 or straight convex portions 42, 43, 48, 49, 54, 55, 60, 61, 67, 68, 75, 76, 44, 45, 50, 51, 56, 57, 62, 63, 69 , 70, 77, 78 are provided on the flat plate portion 5a. Thereby, the section modulus of the cut surface along the direction (FD) in which the pair of end sides 12 and 12 'are arranged can be increased, and the direction in which the pair of side sides 11 and 11' are arranged (FW). The section modulus of the cut surface along the line can be increased. Therefore, the same effect as the corrugated fin 5 of the first embodiment can be obtained by any of the corrugated fins 5A to 5F of the second to seventh embodiments. The radiator including the corrugated fins 5A to 5F has improved product accuracy and is easy to manufacture, like the radiator 1 of the first embodiment.

  The corrugated fin of the present invention and the heat exchanger provided with the corrugated fin have been described based on a plurality of embodiments and modifications. However, the present invention is not limited to the configurations described in the above embodiments and modifications. The configurations can be changed as appropriate without departing from the spirit of the invention, for example, by appropriately combining the configurations described in the embodiments and modifications.

  The corrugated fin of the present invention and the heat exchanger provided with the corrugated fin can surely prevent the occurrence of bending at an unexpected location during production, thereby improving product accuracy and facilitating production. Since it has a characteristic that it can be used, it can be suitably used for applications such as radiators, oil coolers, and aftercoolers.

1 Radiator (heat exchanger)
4 Tube 5 Corrugated fin 5, 5A, 5B, 5C, 5D, 5E, 5F Corrugated fin 5a Flat plate part 5b Joint part 11, 11 'Side edge 12, 12' End edge 13 Groove-shaped recessed part (1st Embodiment)
13A Groove-shaped recess (Modification of the first embodiment)
13B Groove-shaped concave portion (modified example of the first embodiment)
13C groove-shaped recess (modified example of the first embodiment)
15 Streaky convex portion (first embodiment)
16 Concave portion (first embodiment)
17, 18 Convex portion (first embodiment)
20 Flat surface 40 Groove-shaped recess (second embodiment)
41 Concave portion (second embodiment)
42, 43 Straight convex portion (second embodiment)
44, 45 convex portion (second embodiment)
46 groove-shaped recess (third embodiment)
47 Concave portion (third embodiment)
49, 48 Streaky convex portion (third embodiment)
50, 51 Convex (third embodiment)
52 groove-like recess (fourth embodiment)
53 recess (fourth embodiment)
54,55 Straight convex portion (fourth embodiment)
56, 57 Convex (fourth embodiment)
58 groove-like recess (fifth embodiment)
59 Concave portion (fifth embodiment)
60, 61 Streaky convex portion (fifth embodiment)
62, 63 convex portion (fifth embodiment)
64, 65 groove-shaped recess (sixth embodiment)
66 recess (sixth embodiment)
67, 68 Straight convex portion (sixth embodiment)
69, 70 convex portion (sixth embodiment)
71, 72 groove-shaped recess (seventh embodiment)
73, 74 recess (seventh embodiment)
75,76 Streaky convex portion (seventh embodiment)
77, 78 convex portion (seventh embodiment)

Claims (5)

One flat plate portion having a pair of opposite side edges and a pair of opposite end sides, respectively, and a joint portion connected to the side edge of the one flat plate portion are alternately bent and formed in a corrugated shape. In the corrugated fin for the heat exchanger
The one flat plate portion includes a groove-like concave portion extending obliquely with respect to the pair of side sides on the surface thereof.
The groove-shaped recess has a first groove-shaped recess and a second groove-shaped recess,
The first groove-shaped recess extends obliquely in a direction from one side of the pair of sides to the other side, with a central portion in the direction in which the pair of sides is disposed, The second groove-shaped recess extends obliquely in a direction from the other side of the pair of sides to the one side, with a central portion in the direction in which the pair of sides is disposed,
A corrugated fin having at least one concave portion at an arbitrary cut surface in two directions of a direction in which the pair of side sides are arranged and a direction in which the pair of end sides are arranged. 2. The corrugated fin according to claim 1, wherein the first groove-like recess and the second groove-like recess are continuous in a V shape in plan view when one end side of the first flat plate portion is turned up. One flat plate portion having a pair of opposite side edges and a pair of opposite end sides, respectively, and a joint portion connected to the side edge of the one flat plate portion are alternately bent and formed in a corrugated shape. In the corrugated fin for the heat exchanger
The one flat plate portion includes a streak-like convex portion extending obliquely with respect to the pair of side sides on the surface thereof.
The streaky convex portion has a first streaky convex portion and a second streaky convex portion,
The first streak-shaped convex portion obliquely extends in a direction from one side of the pair of sides to the other side, with a central portion in a direction in which the pair of sides is disposed as a base point. The second streaky convex portion is inclined in a direction from the other side of the pair of sides to the side of the one side, with a central portion in the direction in which the pair of sides is disposed as a base point. Elongate,
A corrugated fin having at least one convex portion at an arbitrary cut surface in two directions of a direction in which the pair of side sides are arranged and a direction in which the pair of end sides are arranged. 4. The corrugated body according to claim 3, wherein the first streaky convex portion and the second streaky convex portion are continuous in a V shape in a plan view when one end side of the flat plate portion of the first plate faces up. 5. fin.   A heat exchanger comprising the corrugated fin according to claim 1.

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