JP4984813B2 - Heat exchanger - Google Patents

Abstract

A heat exchanger having a core section (4) that is provided with tubes (2), a header tank (5) that communicates with the tubes (2), and an insert (7) that is placed substantially in parallel to the longitudinal direction of the tubes (2) so as to be in contact with the core section (4) at its end, to which heat from the core section (4) is transmitted, and both ends of which are supported by the header tank (5). Stress absorbing sections (74,76,77) for absorbing stress occurring in the longitudinal direction of the insert (7) are formed at the insert (7) such that they are arranged from the upstream side to downstream side of air flow in the insert (7). The end on the upstreammost side of the air flow and the end of the downstreammost side of the air flow at the stress absorbing sections (74,76,77) are arranged so that they are not superposed over each other in the direction of the air flow.

Description

  The present invention relates to a heat exchanger, and is effective when applied to a so-called multi-flow type radiator that cools cooling water of an internal combustion engine such as a vehicle engine.

  2. Description of the Related Art Conventionally, a multi-flow type radiator includes a core portion having a plurality of tubes, a header tank communicating with the plurality of tubes, and an insert that is disposed at an end portion of the core portion and reinforces the core portion. Moreover, the header tank is comprised from the tank body which comprises the core plate and the tank internal space to which the tube was joined. And the tube and insert are joined to the core plate in the state inserted in the header tank. At this time, the tube is pressed down with equal force by the insert through the fin.

  In such a radiator, when the temperature of the cooling water flowing through the tube changes, the amount of thermal expansion differs between the tube that is directly affected by the cooling water and the insert that is only indirectly affected. Therefore, due to the difference in thermal expansion between the tube and the insert due to the temperature difference, thermal stress accompanying thermal strain is likely to occur at the root portion (joint portion) between the tube adjacent to the insert and the core plate. For this reason, when temperature changes repeatedly and thermal stress changes repeatedly, there existed a problem that the tube near a root part fractured | ruptured.

  On the other hand, a thermal strain prevention structure that cuts the central portion in the longitudinal direction of the insert to absorb thermal strain has been proposed (for example, see Patent Document 1).

In addition, a thermal strain prevention structure has been proposed in which a bulge portion bulged in a substantially semicircular cross section is formed in the insert, and thermal strain is absorbed by deformation of the bulge portion (see, for example, Patent Document 2). .
Japanese Patent Laid-Open No. 11-325783 JP 11-237197 A

  However, in the thermal distortion prevention structure of Patent Document 1, the force for pressing the tube at the notch portion of the insert becomes weak. For this reason, when the internal pressure of a tube becomes high at the time of pressurization of cooling water, and a tube swells, an insert is pushed by a tube and deforms locally at a notch. As a result, there arises a problem that a portion adjacent to the notch of the tube swells and deforms, and the tube is damaged.

  Also in the thermal distortion prevention structure of the above-mentioned patent document 2, since the force which presses a tube in the bulging part of an insert becomes weak, the same problem as the thermal distortion prevention structure of the above-mentioned patent document 1 arises.

  An object of this invention is to provide the heat exchanger which can ensure a pressure | voltage resistant performance while reducing a thermal distortion in view of the said point.

In order to achieve the above object, in the invention described in claim 1, the core (4) having a plurality of tubes (2) through which the heat medium flows, and the tubes (2) at both longitudinal ends of the tubes (2). The header tank (5) extending in a direction orthogonal to the longitudinal direction of the tube (2) and communicating with the tube (2), and the length of the tube (2) so as to contact the core portion (4) at the end of the core portion (4) A heat exchanger that is disposed substantially parallel to the direction and that conducts heat from the core portion (4), and includes both ends (7) supported by the header tank (5),
The tube (2) has a flat cross-sectional shape along the air flow direction,
The top of the fin (3) formed in a wave shape is joined to the flat surfaces on both sides of the tube (2),
The insert (7) comes into contact with the top of the wavy fin (3) located at the end of the core (4),
The insert (7) is formed with stress absorbing portions (74, 76, 77) that absorb stress generated in the longitudinal direction of the insert (7).
The stress absorbing portion (74, 76, 77) is provided to be inclined with respect to the air flow direction from the air flow upstream side to the downstream side of the insert (7),
Stress absorbing portion and the end portion of the air end of the flow upstream end and the air flow downstream side of the (74, 76, 77), as feature being disposed so as not to overlap each other in the direction of air flow Yes.

Thus, the stress which arises in an insert longitudinal direction can be absorbed by forming a stress absorption part (74, 76, 77) in insert (7).
Further, the stress absorbing portion (74, 76, 77) is provided to be inclined with respect to the air flow direction from the upstream side to the downstream side of the air flow of the insert (7), and the stress absorbing portion (74, 76, 77). and an end portion of the air end of the flow upstream end and the air flow downstream side, since arranged so as not to overlap each other in the air flow direction in the stress absorbing portion in the insert (7) (74, 76, 77) That is, the site | part with a weak force which presses down a tube (2) can be disperse | distributed in the longitudinal direction of a tube (2). Thereby, when the internal pressure of a tube (2) becomes high, it can prevent that an insert (7) deform | transforms locally in a stress absorption part. For this reason, since it can prevent that a tube (2) swells and deform | transforms, damage to a tube (2) can be prevented. Therefore, it is possible to reduce thermal distortion and to ensure pressure resistance performance.

Moreover, in invention of Claim 2, the core part (4) which has the some tube (2) through which a heat medium flows, and the longitudinal direction of a tube (2) are orthogonal to the longitudinal direction both ends of the tube (2). The header tank (5) that extends in the direction to communicate with the tube (2), and substantially parallel to the longitudinal direction of the tube (2) so as to contact the core (4) at the end of the core (4) A heat exchanger that is disposed and heat is transferred from the core part (4) and has both ends (7) supported by the header tank (5),
The tube (2) has a flat cross-sectional shape along the air flow direction,
The insert (7) has a surface substantially parallel to the flat surface of the tube (2) and extends substantially parallel to the longitudinal direction of the tube (2), and the air flow direction of the base portion (71) Providing a pair of side ribs (72) projecting from both end portions in a direction substantially orthogonal to the base portion (71) and extending substantially parallel to the longitudinal direction of the tube (2),
The base part (71) is formed with a base part side bulging part (74) in which the cross section of the base part (71) swells in a substantially U shape,
The base part side bulge part (74) is provided from the air flow upstream side to the downstream side of the insert (7),
The end on the most upstream side of the air flow and the end on the most downstream side of the air flow in the base side bulging portion (74) are arranged so as not to overlap each other in the air flow direction,
A stress absorbing part that absorbs stress generated in the longitudinal direction of the insert (7) is constituted by a base part side bulging part (74),
The side ribs (72) are characterized in that cut portions (73a, 73b) are formed in portions corresponding to the most upstream end and the most downstream end of the base portion side bulging portion (74), respectively .
Moreover, in invention of Claim 3, the core part (4) which has the some tube (2) through which a heat carrier flows, and the longitudinal direction of a tube (2) are orthogonal to the longitudinal direction both ends of a tube (2). The header tank (5) that extends in the direction to communicate with the tube (2), and substantially parallel to the longitudinal direction of the tube (2) so as to contact the core (4) at the end of the core (4) A heat exchanger that is disposed and heat is transferred from the core part (4) and has both ends (7) supported by the header tank (5),
The tube (2) has a flat cross-sectional shape along the air flow direction,
The insert (7) has a base portion (71) having a surface substantially parallel to the flat surface of the tube (2) and extending substantially parallel to the longitudinal direction of the tube (2),
The base part (71) is formed with a base part side bulging part (74) in which the cross section of the base part (71) swells in a substantially U shape,
The base part side bulge part (74) is provided from the air flow upstream side to the downstream side of the insert (7),
The end on the most upstream side of the air flow and the end on the most downstream side of the air flow in the base side bulging portion (74) are arranged so as not to overlap each other in the air flow direction,
A stress absorbing part that absorbs stress generated in the longitudinal direction of the insert (7) is constituted by a base part side bulging part (74),
The base part (71) is provided with a base part side rib (78) that protrudes outward in the tube stacking direction and extends substantially parallel to the longitudinal direction of the insert (7).
The base part side rib (78) is characterized in that one end side is connected to the base part side bulging part (74).

In the inventions according to claim 2 and claim 3, the “substantially U-shape” refers to a shape composed of two surfaces facing substantially parallel and a bottom surface close to an arc shape connecting the two surfaces. However, the bottom surface may have a horizontal portion. That is, the cross section includes a shape close to a U-shape.
According to invention of Claim 2, it produces in an insert longitudinal direction by forming the stress absorption part comprised by the base part side bulging part (74) swelled in the substantially U shape in insert (7). It can absorb stress.
In the invention according to claim 2, the air flow upstream end and the air flow downstream end of the base side bulging portion (74) forming the stress absorbing portion are arranged in the air flow direction. In the insert (7), the base portion side bulging portion (74) forming the stress absorbing portion, that is, the portion where the force for pressing the tube (2) is weak is set in the longitudinal direction of the tube (2). Can be dispersed. Thereby, when the internal pressure of a tube (2) becomes high, it can prevent that an insert (7) deform | transforms locally in a base part side bulging part (74). For this reason, since it can prevent that a tube (2) swells and deform | transforms, damage to a tube (2) can be prevented. Therefore, it is possible to reduce thermal distortion and to ensure pressure resistance performance.
Moreover, in invention of Claim 3, it produces in an insert longitudinal direction by forming in the insert (7) the stress absorption part comprised by the base part side bulging part (74) swelled in the substantially U shape. It can absorb stress.
Also in the invention according to claim 3, the air flow upstream end and the air flow downstream end in the base side bulging portion (74) forming the stress absorbing portion are arranged in the air flow direction. In the insert (7), the base portion side bulging portion (74) forming the stress absorbing portion, that is, the portion where the force for pressing the tube (2) is weak is set in the longitudinal direction of the tube (2). Can be dispersed. Thereby, when the internal pressure of a tube (2) becomes high, it can prevent that an insert (7) deform | transforms locally in a base part side bulging part (74). For this reason, since it can prevent that a tube (2) swells and deform | transforms, damage to a tube (2) can be prevented. Therefore, it is possible to reduce thermal distortion and to ensure pressure resistance performance.
By the way, during pressurization (when the internal pressure of the tube (2) becomes high), the entire heat exchanger (1) is deformed so as to swell in the tube stacking direction. The entire vessel (1) is deformed in the longitudinal direction of the tube (2) and the tube stacking direction.
On the other hand, in the invention according to claim 3, the base portion side rib (78) that protrudes outward in the tube stacking direction and extends substantially parallel to the longitudinal direction of the insert (7) on the base portion (71) of the insert (7). ), The rigidity of the insert (7) in the tube stacking direction can be increased. Thereby, it becomes possible to improve the pressure resistance performance and vibration resistance performance of the entire heat exchanger (1).
Further, when stress is generated in the longitudinal direction of the insert (7), the stress concentrates on the connecting portion between the base portion (71) of the insert (7) and the base portion side bulging portion (74), and the connecting portion is There is a possibility of breaking. On the other hand, in the invention according to claim 3, the base portion (71) and the base portion side bulge are connected by connecting one end side of the base portion side rib (78) and the base portion side bulging portion (74). It is possible to prevent stress from concentrating on the connecting portion with the protruding portion (74).

According to a fourth aspect of the present invention, in the heat exchanger according to the second or third aspect, the top portions of the wave-shaped fins (3) are joined to the flat surfaces on both sides of the tube (2), and the insert ( 7) comes into contact with the top of the wavy fin (3) located at the end of the core (4).
As in the fifth aspect of the invention, in the heat exchanger according to any one of the second to fourth aspects, the base portion side bulging portion (74) may be inclined with respect to the air flow direction. Good.

Moreover, in invention of Claim 6, in the heat exchanger as described in any one of Claim 2 thru | or 5, the base side swelling part (74) is divided | segmented into plurality by the air flow direction, a plurality of base portion-side expansions (74) is in the feature that the base portion (71) through a slit formed in the cross section of (75) is connected.

  Thereby, the length of the base part side bulging part (74) in the air flow direction can be shortened by the length of the slit (75) in the air flow direction. Thereby, moldability can be improved.

Further, in the invention according to claim 7, in the heat exchanger according to claim 6, a plurality of base portion-side expansions (74) is in a feature that is not located on the same straight line with one another.

  Accordingly, the distance between the cut portion (73a) on the upstream side of the air flow and the cut portion (73b) on the downstream side of the air flow is increased without increasing the angle of the base portion side bulged portion (74) with respect to the air flow direction. be able to. For this reason, it becomes possible to ensure pressure | voltage resistance performance reliably, without reducing the moldability of the base part side bulging part (74).

In the invention according to claim 8, in the heat exchanger according to claim 6 or 7, the plurality of base-side expanded portions (74) are inclined in different directions with respect to the air flow direction. It is a feature that.

  Thereby, since the springback at the time of shape | molding a some base part side bulging part (74) can be reduced, it becomes possible to improve a moldability.

Further, in the invention according to claim 9, in the heat exchanger according to claim 6 or 7, the plurality of base-side bulging portions (74) are substantially parallel to the air flow direction, and the air flow. It is a feature that is disposed so as not to overlap each other in the direction.

  Thereby, since it is not necessary to incline the base side bulging part (74) with respect to an air flow direction, it becomes possible to improve a moldability.

In the invention according to claim 10, in the heat exchanger according to claim 1, the insert (7) has a surface substantially parallel to the flat surface of the tube (2), and the length of the tube (2). A base portion (71) extending substantially parallel to the direction and a pair of side ribs (72) protruding in a direction substantially orthogonal to the base portion (71) and extending substantially parallel to the longitudinal direction of the tube (2). and have the stress absorbing portion has a feature that the base portion (71) is a notched cut-out portion to be inclined with respect to the air flow direction (76).

  Thereby, since a stress absorption part can be comprised only by the notch part (76) formed in insert (7), it becomes possible to ensure pressure | voltage resistance performance with a simple structure.

Further, in the invention according to claim 11, in the heat exchanger according to claim 10, notches (76) is in the feature that only one side is open.

Thus, it is possible to prevent the lowering by leaving one of the side ribs (72) of the pair of side ribs (72), more than necessary rigidity. For this reason, since the force which presses down the tube 2 can be enlarged more, while being able to reduce a thermal distortion, it becomes possible to ensure pressure | voltage resistance performance reliably.

  Moreover, both ends of the notch (76) may be opened or both ends may be connected.

Further, as in the invention described in claim 12, in the heat exchanger described in claim 10 or 11, a plurality of notches (76) may be provided.

Further, in the heat exchanger according to claim 10, as in the invention according to claim 13, a plurality of notches (76) are provided, and only one end side is opened, and a plurality of notches (76) are provided. The open end portions in may be alternately arranged on the upstream and downstream sides of the air flow in the base portion (71).

Further, in the heat exchanger according to claim 12 or 13, as in the invention according to claim 14, the plurality of notches (76) can be inclined in different directions with respect to the air flow direction. .

Moreover, in invention of Claim 15, in the heat exchanger of Claim 10, in the site | part adjacent to the notch part (76) in a pair of side rib (72), it is a cross section of side rib (72). There are side ribs side bulge bulging direction of air flow (77) is formed into a substantially U-shaped, the stress absorbing portion, the feature that it contains side ribs side bulging portion (77) Yes.

  In this way, the notch portion (76) is formed in the base portion (71), and the side rib side bulge portions (77) are formed in the pair of side surface ribs (72), whereby the insert (7) in the longitudinal direction. It is possible to reliably absorb the stress generated in.

Further, in the invention according to claim 16, in the heat exchanger according to any one of claims 1, 10 to 15, the insert (7) has a protrusion (78) protruding outward in the tube stacking direction. is provided, the protrusion (78) has a feature that it is connected to the stress absorbing portions (74, 76, 77).

By the way, when the pressure is applied (when the internal pressure of the tube (2) becomes high), the entire heat exchanger (1) is deformed so as to swell in the tube stacking direction, and when the vibration is applied, the entire heat exchanger (1) is deformed. The deformation in the longitudinal direction of the tube (2) and the tube stacking direction occurs. On the other hand, in the invention described in claim 16, by providing the insert (7) with a protrusion (78) protruding outward in the tube stacking direction, the rigidity of the insert (7) in the tube stacking direction can be increased. it can. This makes it possible to improve the pressure resistance and the resistance to vibration performance.

In the invention according to claim 17, in the heat exchanger according to claim 3, the insert (7) is substantially orthogonal to the base portion (71) from both ends of the air flow direction of the base portion (71). And has a pair of side ribs (72) extending in a direction parallel to the longitudinal direction of the tube (2), and the most upstream end of the base side bulging portion (74) in the side rib (72) and the portions corresponding to the most downstream end, and that each cut portion (73a, 73b) are formed as feature.

  Thus, the rigidity of the insert (7) in the tube stacking direction can be increased by providing the base portion (71) of the insert (7) with the base portion side rib (78) protruding outward in the tube stacking direction. . Thereby, even if the height of the side rib (72) (the length in the tube stacking direction) is lowered, the rigidity of the insert (7), that is, the strength of the heat exchanger (1) can be ensured. Therefore, even when the mounting space for the heat exchanger (1) is limited, the height of the core portion (4) (the length in the tube stacking direction) is increased by the amount corresponding to the reduction in the height of the side ribs (72). Therefore, the heat exchange performance can be improved.

Further, in the invention according to claim 18, in the heat exchanger according to claim 3 or 17, the base part side rib (78) is provided one by one with the base part side bulging part (74) interposed therebetween. that has been a feature.

  Thereby, the base part side rib (78) can be arrange | positioned in the wide range of insert (7) longitudinal direction. For this reason, the rigidity of the tube stacking direction of the insert (7) can be further increased, and the pressure resistance performance and the earthquake resistance performance can be further improved.

Further, as in the invention described in claim 19, in the heat exchanger according to claim 18, the rib on the base portion side (78) is arranged at the center of the base portion (71) in the air flow direction of the insert (7). They can be arranged on one side and the other side in the air flow direction with respect to the center line (L) crossing in the longitudinal direction. Thereby, since the base part side rib (78) can be arrange | positioned in the wide range of the air flow direction of insert (7), the rigidity of the tube lamination direction of insert (7) can be made still higher. Therefore, it is possible to further improve the pressure resistance and the resistance to vibration performance.

In the invention according to claim 20, in the heat exchanger according to claim 3 or 17, the base portion (71) protrudes outward in the tube stacking direction and is substantially parallel to the longitudinal direction of the insert (7). the second base portion-side ribs (78a) is a feature that is provided to extend. Thus, it is possible to increase the tube stiffness in the stacking direction of the insert (7), it becomes possible to further improve the pressure resistance and the resistance to vibration performance.

Further, as in the invention described in claim 21, in the heat exchanger according to any one of claims 3, 17 to 20, the base portion (71) protrudes outward in the tube laminating direction and the insert (7 ) May be provided with a second base portion side rib (78a) extending substantially parallel to the longitudinal direction.
Further, in the invention according to claim 22, in the heat exchanger according to claim 19, the base portion (71) protrudes outward in the tube stacking direction and extends substantially parallel to the longitudinal direction of the insert (7). 2 base part side ribs (78a) are provided, and the second base part side ribs (78a) are provided one by one with the base part side bulging part (74) interposed therebetween, and the base part The air flow direction center of (71) is arranged on one side and the other side of the air flow direction with respect to the center line (L) crossing the longitudinal direction of the insert (7),
On each of one side and the other side in the air flow direction with respect to the center line (L), the second base portion side rib (78a) has a base portion side rib (74) with respect to the base portion side bulging portion (74). is a feature that is disposed on the opposite side of the 78).

  Thereby, since the rigidity of the tube stacking direction of the insert (7) can be further increased, the pressure resistance performance and the earthquake resistance performance can be further improved.

Further, as in the invention described in claim 23, in the heat exchanger according to claim 22, one end side of the second base portion side rib (78a) is connected to the base portion side bulging portion (74). be able to. Thereby, it can prevent more reliably that stress concentrates on the connection part of a base part (71) and a base part side bulging part (74).

Further, as in the invention according to claim 24, in the heat exchanger according to claim 3 or 17, the base part side ribs (78) are arranged one by one with the base part side bulging part (74) interposed therebetween. A second base portion side rib (78a) that is arranged on the same straight line, protrudes outward in the tube stacking direction and extends substantially parallel to the longitudinal direction of the insert (7), Two base part side ribs (78a) can be provided one by one with the base part side bulging part (74) interposed therebetween, and can be connected to the base part side rib (78), respectively.

In the invention according to claim 25, in the heat exchanger according to claim 10, the notch (76) extends to the side rib (72), and both end portions of the notch (76). Are respectively disposed in the plane of the pair of side ribs (72), and the insert (7) is substantially parallel to the notch (76) from the end of the side rib (72) on the outer side in the tube stacking direction. the second notch is cut out (79) is set, the second notch portion (79) is in the feature that only one side is open.

  Thereby, since the side rib (72) of the insert (7) is not completely cut, it is possible to avoid lowering the rigidity of the insert (7) more than necessary, and to ensure the pressure resistance performance. It becomes possible.

  Furthermore, when the insert (7) is press-molded, the notch portion (76) and the second notch portion (79) may be formed in advance, so that the moldability can be improved.

  In the present specification, “substantially parallel” does not mean that they are completely parallel, but may be approximately parallel.

  In addition, the code | symbol in the bracket | parenthesis of each said means shows the correspondence with the specific means as described in embodiment mentioned later.

(First embodiment)
Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. 1 and 2. In the present embodiment, the heat exchanger according to the present invention is applied to a radiator 1 that exchanges heat between cooling water (heat medium) that cools a vehicle engine and air. FIG. 1 is a front view of a radiator 1 according to the first embodiment.

  In FIG. 1, a tube 2 is a tube through which cooling water flows. The tube 2 is formed in a flat shape so that the air flow direction (perpendicular to the paper surface) coincides with the major axis direction, and the longitudinal direction thereof is A plurality of them are arranged in parallel in the vertical direction so as to coincide with the horizontal direction.

  In addition, fins 3 formed in a wave shape are joined to the flat surfaces on both sides of the tube 2, and the heat transfer area with the air is increased by the fins 3 to promote heat exchange between the cooling water and the air. Yes. Hereinafter, the substantially rectangular heat exchanging portion including the tube 2 and the fin 3 is referred to as a core portion 4.

  The header tank 5 extends in a direction (vertical direction in the present embodiment) perpendicular to the longitudinal direction of the tube 2 at a longitudinal end portion (in the present embodiment, horizontal end portion) of the tube 2, and the plurality of tubes 2. The header tank 5 includes a core plate 5a into which the tube 2 is inserted and joined, and a tank body 5b that forms a space in the tank together with the core plate 5a.

  The header tank 5 is provided with a cooling water inlet 6a connected to a cooling water outlet side of an engine (not shown) and a cooling water outlet 6b connected to a cooling water inlet side of the engine. Further, at both ends of the core portion 4, inserts 7 that extend substantially parallel to the longitudinal direction of the tube 2 and reinforce the core portion 4 are provided.

  Fig.2 (a) is a top view which shows the insert 7 in this 1st Embodiment, FIG.2 (b) is a front view of Fig.2 (a). As shown in FIGS. 2A and 2B, the insert 7 has a base portion 71 having a surface substantially parallel to the flat surface of the tube 2 and extending substantially parallel to the longitudinal direction of the tube 2, and the base portion 71. And a pair of side ribs 72 that protrude in a direction substantially perpendicular to the base portion 71 (tube stacking direction) from both ends in the air flow direction and extend substantially parallel to the tube longitudinal direction.

  The pair of side ribs 72 of the insert 7 are formed with cut portions 73a and 73b cut from the end portions of the side ribs 72 on the outer side in the tube stacking direction toward the inner side in the tube stacking direction. Further, a cut portion formed in the side rib 72 on the upstream side of the air flow (hereinafter referred to as upstream cut portion 73a) and a cut portion formed in the side rib 72 on the downstream side of air flow (hereinafter referred to as downstream cut portion 73b). Are arranged so as not to overlap each other in the air flow direction.

A base portion side bulge portion 74 is formed in the base portion 71 of the insert 7. The base portion side bulging portion 74 is formed by bulging the cross section of the base portion 71 outward in the tube stacking direction in a substantially U shape. Moreover, the base part side bulging part 74 is comprised so that the tensile or compressive stress which arises in an insert longitudinal direction may be absorbed when self deform | transforms.

As shown in FIG. 2 (a), the base portion side bulging portion 74 is formed so as to connect the upstream cut portion 73a and the downstream cut portion 73b, and is inclined with respect to the air flow direction. Has been placed.

As described above, by forming the base portion side bulged portion 74 having a substantially U-shaped cross section in the base portion 71 of the insert 7, stress generated in the insert longitudinal direction can be absorbed.

Further, the base portion-side expansion 74 by arranging inclined with respect to the air flow direction, the stress absorbing portion in the insert 7, that the force held down the tube 2 is a weak portion can be dispersed in the longitudinal direction of the tube . Thereby, when the internal pressure of the tube 2 becomes high, it can prevent that the insert 7 deform | transforms locally in the base part side bulging part 74. FIG. For this reason, since it can prevent that the tube 2 swells and deform | transforms, damage to the tube 2 can be prevented.

  Therefore, it is possible to reduce thermal distortion and to ensure pressure resistance performance.

(Second Embodiment)
Next, a second embodiment of the present invention will be described with reference to FIG. The same parts as those in the first embodiment are denoted by the same reference numerals and description thereof is omitted. Fig.3 (a) is a top view which shows the insert 7 in this 2nd Embodiment, FIG.3 (b) is a front view of Fig.3 (a).

  As shown to Fig.3 (a), (b), the slit 75 is formed in the base part 71 of the insert 7 of this embodiment. In the present embodiment, the slit 75 is arranged so that its longitudinal direction is substantially parallel to the tube longitudinal direction.

Moreover, the base part side bulging part 74 is divided | segmented into two in the air flow direction. Here, of the two divided base portion side bulging portions 74, the one arranged on the upstream side of the air flow is referred to as the first base portion side bulging portion 74a, and is arranged on the downstream side of the air flow. Is referred to as a second base portion side bulging portion 74b.

The two base portion side bulging portions 74 a and 74 b are connected via a slit 75. Further, the two base portion side bulging portions 74a and 74b are not arranged in the same straight line. In the present embodiment, the two base portion side bulging portions 74 a and 74 b are connected one by one to both longitudinal ends of the slit 75.

  Thereby, the effect similar to the said 1st Embodiment can be acquired.

Furthermore, the base part side bulging part 74 is divided into two in the air flow direction, and the two base part side bulging parts 74a and 74b are connected via the slit 75, whereby the base part side bulging part 74 is connected. Can be shortened by the length of the slit 75 in the air flow direction. Thereby, moldability can be improved.

Further, by not arranging the two base portion side bulged portions 74a and 74b in the same straight line, the upstream cut portion 73a and the air flow downstream are not changed without changing the angle of the base portion side bulged portion 74 with respect to the air flow direction. The distance from the cut portion 73b on the side can be increased. For this reason, it becomes possible to ensure pressure | voltage resistance performance reliably, without reducing the moldability of the base part side bulging part 74. FIG.

(Third embodiment)
Next, a third embodiment of the present invention will be described with reference to FIG. The same parts as those in the second embodiment are denoted by the same reference numerals and description thereof is omitted. Fig.4 (a) is a top view which shows the insert 7 in this 3rd Embodiment, FIG.4 (b) is a front view of Fig.4 (a).

As shown in FIG. 4, the two base portion-side expansion 74a of this embodiment, 74b are inclined in opposite directions with respect to the air flow direction.

More specifically, an end portion of the slit 75 to which the first base portion side bulged portion 74a is connected is disposed on the downstream cut portion 73b side with respect to the upstream cut portion 73a in the tube longitudinal direction. On the other hand, the end portion of the slit 75 to which the second base portion side bulged portion 74b is connected is disposed on the opposite side of the upstream cut portion 73a with respect to the downstream cut portion 73b in the tube longitudinal direction.

  Thereby, the effect similar to the said 2nd Embodiment can be acquired.

Furthermore, the spring back at the time of shaping | molding the base part side bulging parts 74a and 74b is reduced by inclining the two base part side bulging parts 74a and 74b in the opposite direction with respect to the air flow direction, respectively. Therefore, the moldability can be improved.

(Fourth embodiment)
Next, a fourth embodiment of the present invention will be described with reference to FIG. The same parts as those in the second embodiment are denoted by the same reference numerals and description thereof is omitted. Fig.5 (a) is a top view which shows the insert 7 in this 4th Embodiment, FIG.5 (b) is a front view of Fig.5 (a).

  As shown in FIGS. 5A and 5B, two slits 75 are formed in the base portion 71 of the insert 7 of the present embodiment. In the present embodiment, the two slits 75 are arranged such that the longitudinal direction thereof is substantially parallel to the longitudinal direction of the tube. Here, of the two slits 75, the one disposed on the upstream side of the air flow is referred to as a first slit 75a, and the one disposed on the downstream side of the air flow is referred to as a second slit 75b.

Moreover, the base part side bulging part 74 is divided | segmented into three in the air flow direction. Three base portion-side expansion 74a~74c, together are substantially formed parallel to the direction of air flow, it is disposed so as not to overlap each in air flow direction. Here, of the three divided base portion side bulging portions 74, the one arranged on the upstream side of the air flow is called the first base portion side bulging portion 74a, and is arranged on the downstream side of the air flow. Is called the second base portion side bulging portion 74b, and the portion disposed between the first base portion side bulging portion 74a and the second base portion side bulging portion 74c is the third base portion side. It is called the bulging part 74c.

As shown to Fig.5 (a), the three base part side bulging parts 74a-74c are connected via two slits 75a and 75b. More specifically, the first base portion side bulging portion 74a is connected to one end portion of the first slit 75a in the tube longitudinal direction, and the third base portion side bulging portion 74c is connected to the other end portion. It is connected. One end of the second slit 75b in the tube longitudinal direction is connected to the end of the third base portion- side bulged portion 74c on the downstream side of the air flow, and the other end is connected to the second base portion side. The bulging part 74b is connected.

  Thereby, the effect similar to the said 2nd Embodiment can be acquired.

Furthermore, while being substantially formed parallel to the three base portion-side expansion 74a~74c air flow direction, by disposing so as not to overlap each in air flow direction, the base portion-side expansion 74 Since it is not necessary to incline the air flow direction, it is possible to improve the moldability.

(Fifth embodiment)
Next, a fifth embodiment of the present invention will be described with reference to FIG. The same parts as those in the first embodiment are denoted by the same reference numerals and description thereof is omitted. FIG. 6 (a) is a plan view showing the insert 7 in the fifth embodiment, and FIG. 6 (b) is a front view of FIG. 6 (a).

  As shown in FIGS. 6 (a) and 6 (b), the insert 7 of this embodiment has a notch 76 formed therein. The notch 76 is formed by notching the base 71 from one end in the air flow direction toward the other end so as to be inclined with respect to the air flow direction. For this reason, the air flow upstream end and the air flow downstream end of the notch 76 do not overlap each other in the air flow direction.

  In the present embodiment, the notch 76 is continuously formed from the end of the base portion 71 on the upstream side of the air flow to the end of the air flow on the downstream side. The notch 76 is also continuously formed on the side rib 72. More specifically, a portion of the side rib 72 adjacent to the end of the notch 76 is notched substantially parallel to the tube stacking direction. Therefore, in this embodiment, the insert 7 is completely divided by the notch 76.

  As described above, by forming the notch 76 in the base portion 71 of the insert 7, it is possible to absorb stress generated in the insert longitudinal direction.

  Further, by arranging the notch portion 76 to be inclined with respect to the air flow direction, the stress absorbing portion in the insert 7, that is, the portion where the force for pressing the tube 2 is weak can be dispersed in the tube longitudinal direction. Thereby, when the internal pressure of the tube 2 becomes high, it is possible to prevent the tube 2 from being deformed so as to locally swell, so that the tube 2 can be prevented from being damaged.

  Therefore, it is possible to reduce thermal distortion and to ensure pressure resistance performance.

  Further, since the stress generated in the longitudinal direction of the insert can be absorbed simply by forming the notch 76 in the insert 7, it is possible to ensure pressure resistance performance with a simple configuration.

(Sixth embodiment)
Next, a sixth embodiment of the present invention will be described with reference to FIG. The same parts as those in the fifth embodiment are denoted by the same reference numerals and description thereof is omitted. Fig.7 (a) is a top view which shows the insert 7 in this 6th Embodiment, FIG.7 (b) is a front view of Fig.7 (a).

  As shown in FIGS. 7A and 7B, the cutout portion 76 of the present embodiment is open only at one end side in the air flow direction (in this embodiment, the end portion on the upstream side of the air flow). . More specifically, the cutout portion 76 has one end side in the air flow direction connected to the end portion of the base portion 71 in the air flow direction, and the other end side (in this embodiment, the end portion on the downstream side of the air flow) as the base. Arranged in the portion 71. That is, in this embodiment, the insert 7 is not completely divided by the notch 76.

  In this way, by opening only one end side of the cut portion 76, it is possible to avoid the one side rib 72 from being left and to reduce the rigidity more than necessary. Thereby, since the force which presses down the tube 2 can be enlarged more, while being able to reduce a thermal distortion, it becomes possible to ensure pressure | voltage resistance performance reliably.

(Seventh embodiment)
Next, a seventh embodiment of the present invention will be described with reference to FIG. The same parts as those in the sixth embodiment are denoted by the same reference numerals and description thereof is omitted. Fig.8 (a) is a top view which shows the insert 7 in this 7th Embodiment, FIG.8 (b) is a front view of Fig.8 (a).

  As shown in FIGS. 8A and 8B, the base portion 71 of the insert 7 of the present embodiment has three cutout portions 76 formed in parallel. The three notches 76 are all formed by notching the base portion 71 from the end on the air flow upstream side toward the air flow downstream side.

  Thus, by forming the three notches 76 in the base portion 71, the stress generated in the insert longitudinal direction can be reliably absorbed. Therefore, it is possible to further reduce the thermal distortion and ensure the pressure resistance performance.

(Eighth embodiment)
Next, an eighth embodiment of the present invention will be described with reference to FIG. The same parts as those in the seventh embodiment are denoted by the same reference numerals and description thereof is omitted. FIG. 9A is a plan view showing the insert 7 in the eighth embodiment, and FIG. 9B is a front view of FIG. 9A.

  As shown in FIGS. 9A and 9B, the base portion 71 of the insert 7 has three cutout portions 76 formed in parallel. In this embodiment, of the three notches 76, the notch 76a disposed on the outer side in the longitudinal direction of the tube is formed by notching the base 71 from the end on the upstream side of the air flow toward the downstream side of the air flow. Is formed. On the other hand, the notch 76b disposed on the inner side in the tube stacking direction among the three notches 76 is formed by notching the base portion 71 from the end on the air flow downstream side toward the air flow upstream side. Yes.

  Thereby, the same effect as that of the seventh embodiment can be obtained.

(Ninth embodiment)
Next, a ninth embodiment of the present invention will be described with reference to FIG. The same parts as those in the seventh embodiment are denoted by the same reference numerals and description thereof is omitted. FIG. 10 (a) is a plan view showing the insert 7 in the ninth embodiment, and FIG. 10 (b) is a front view of FIG. 10 (a).

  As shown in FIGS. 10A and 10B, four cutout portions 76 are formed in the base portion 71 of the insert 7 of the present embodiment. Of the four notches 76, two notches (hereinafter referred to as first notches 76 c) are notched from the air flow upstream side to the downstream side of the base portion 71. On the other hand, two of the four notches 76 excluding the first notch 76c (hereinafter referred to as the second notch 76d) extend from the downstream side of the air flow of the base 71 to the upstream side. It is cut away.

  The two first cutout portions 76c are arranged substantially parallel to each other. The second notch 76d is inclined in the direction opposite to the first notch 76c with respect to the air flow direction. The two second cutout portions 76d are arranged substantially parallel to each other.

  Thereby, the same effect as that of the seventh embodiment can be obtained.

(10th Embodiment)
Next, a tenth embodiment of the present invention will be described with reference to FIG. The same parts as those in the fifth embodiment are denoted by the same reference numerals and description thereof is omitted. Fig.11 (a) is a top view which shows the insert 7 in this 10th Embodiment, FIG.11 (b) is a front view of Fig.11 (a). FIG. 12 is a perspective view showing the insert 7 in the tenth embodiment.

  As shown in FIGS. 11A, 11 </ b> B, and 12, the air flow direction both ends of the notch 76 of the present embodiment have a substantially rectangular shape (hereinafter referred to as a rectangle) that is larger than other parts of the notch 76. Part 760). Further, a side rib side bulging portion 77 in which a cross section of the side rib 72 swells in a substantially U shape is formed in a portion of the side rib 72 adjacent to the rectangular portion 760. In the present embodiment, the side rib side bulging portion 77 bulges toward the inside of the insert 7 in the air flow direction.

  As described above, by forming the notch portion 76 in the base portion 71 and forming the side rib-side bulging portions 77 in the pair of side ribs 72, the stress generated in the insert longitudinal direction is reliably absorbed. be able to.

  Further, by arranging the notch portion 76 to be inclined with respect to the air flow direction, the stress absorbing portion in the insert 7, that is, the portion where the force for pressing the tube 2 is weak can be dispersed in the tube longitudinal direction. Thereby, when the internal pressure of the tube 2 becomes high, it is possible to prevent the tube 2 from being deformed so as to locally swell, so that the tube 2 can be prevented from being damaged.

  Therefore, it is possible to reliably reduce thermal distortion and to ensure pressure resistance performance.

(Eleventh embodiment)
Next, an eleventh embodiment of the present invention will be described with reference to FIGS. The same parts as those in the first embodiment are denoted by the same reference numerals and description thereof is omitted.

  FIG. 13 is a perspective view showing the insert 7 of the eleventh embodiment, FIG. 14A is a view taken along the arrow A in FIG. 13, FIG. 14B is a cross-sectional view along BB in FIG. ) Is a cross-sectional view taken along the line CC of FIG.

  As shown in FIGS. 13 and 14A to 14C, the base portion 71 of the insert 7 has a base portion side rib (protrusion portion) 78 protruding outward in the tube stacking direction and extending substantially parallel to the insert longitudinal direction. Is provided. One end of the base portion side rib 78 is connected to the base portion side bulging portion 74. In the present embodiment, the other end side of the base portion side rib 78 is arranged on the end portion side in the longitudinal direction of the base portion 71.

  The base part side ribs 78 are provided one by one with the base part side bulging part 74 interposed therebetween, that is, one on each side of the base part side bulging part 74 in the base part 71. The two base portion side ribs 78 are respectively arranged on one side and the other side of a center line (hereinafter simply referred to as a center line) L that crosses the center of the air flow direction of the base portion 71 in the insert longitudinal direction. In this embodiment, the two base part side ribs 78 are respectively connected to one end and the other end of the base part side bulging part 74 in the air flow direction.

  Further, as shown in FIGS. 14B and 14C, the base portion side rib 78 is formed in a substantially semicircular cross section.

By the way, when pressurizing (when the internal pressure of the tube 2 becomes high), the entire radiator 1 is deformed so as to swell in the tube stacking direction, and when vibrating due to vehicle vibration or the like, the entire radiator 1 is moved in the longitudinal direction of the tube. And deformation in the tube stacking direction. On the other hand, the stress which arises in an insert longitudinal direction can be absorbed by forming the base part side bulging part 74 which the cross section swelled in the base part 71 of the insert 7 in the substantially U shape. Furthermore, the rigidity of the insert 7 in the tube stacking direction can be increased by providing the base portion side rib 78 projecting outward in the tube stacking direction on the base portion 71 of the insert 7 as in the present embodiment. This makes it possible to improve the pressure resistance and the resistance to vibration performance.

  By the way, when stress is generated in the longitudinal direction of the insert 7, the stress may be concentrated on the connection portion between the base portion 71 and the base portion side bulging portion 74 of the insert 7, and the connection portion may be broken. On the other hand, by connecting one end side of the base portion side rib 78 and the base portion side bulging portion 74, stress is prevented from concentrating on the connecting portion between the base portion 71 and the base portion side bulging portion 74. it can.

  Moreover, since the rigidity of the insert 7 in the tube stacking direction can be secured by the base portion side ribs 78, the height of the side ribs 72 (the length in the tube stacking direction) can be reduced. Therefore, even when the mounting space of the radiator 1 is limited, the core portion 4 can be enlarged by the height of the side ribs 72, so that the heat exchange performance can be improved.

  Moreover, since the base part side rib 78 can be arrange | positioned in the wide range of the longitudinal direction of the insert 7 by providing the base part side rib 78 1 each on both sides of the base part side bulging part 74, insert 7 The rigidity in the tube stacking direction can be further increased. Thereby, it is possible to further improve the pressure resistance performance and the earthquake resistance performance.

  Furthermore, the base part side rib 78 can be provided in a wide range of the air flow direction of the insert 7 by arranging the base part side rib 78 on one side and the other side of the center line L in the base part 71, respectively. Therefore, the rigidity of the insert 7 in the tube stacking direction can be further increased. Thereby, it becomes possible to further improve the pressure resistance performance and the earthquake resistance performance.

(Twelfth embodiment)
Next, a twelfth embodiment of the present invention will be described with reference to FIGS. The twelfth embodiment differs from the eleventh embodiment in that the side ribs 72 are eliminated. The same parts as those in the eleventh embodiment are denoted by the same reference numerals and the description thereof is omitted.

  FIG. 15 is a perspective view showing the insert 7 of the twelfth embodiment, FIG. 16 (a) is a view taken in the direction of arrow D in FIG. 15, FIG. 16 (b) is a cross-sectional view taken along line EE in FIG. ) Is a sectional view taken along line FF in FIG. As shown in FIG. 15 and FIGS. 16A to 16C, the insert 7 has only a base portion 71.

  As described above, since the base portion 71 of the insert 7 is provided with the base portion side rib 78 protruding outward in the tube stacking direction, the rigidity of the insert 7 in the tube stacking direction can be increased, and therefore the side ribs are eliminated. Can do. Therefore, even when the mounting space of the radiator 1 is limited, the core portion 4 can be enlarged by the amount of the side ribs eliminated, so that the heat exchange performance can be improved.

(13th Embodiment)
Next, a thirteenth embodiment of the present invention will be described with reference to FIG. The thirteenth embodiment differs from the twelfth embodiment in the arrangement of the base portion side ribs 78. The same parts as those in the twelfth embodiment are denoted by the same reference numerals and the description thereof is omitted.

  FIG. 17 is a perspective view showing the insert 7 of the thirteenth embodiment. As shown in FIG. 17, the two base portion side ribs 78 provided on both sides of the base portion side bulging portion 74 in the base portion 71 are respectively near the central portion of the base portion side bulging portion 74 in the air flow direction. It is connected. Thereby, the same effect as that of the twelfth embodiment can be obtained.

(14th Embodiment)
Next, a fourteenth embodiment of the present invention will be described with reference to FIG. In the fourteenth embodiment, the arrangement of the base portion side ribs 78 is different from that in the eleventh embodiment. The same parts as those in the eleventh embodiment are denoted by the same reference numerals and the description thereof is omitted.

  FIG. 18 is a perspective view showing the insert 7 of the fourteenth embodiment. As shown in FIG. 18, the two base portion side ribs 78 provided on both sides of the base portion side bulging portion 74 in the base portion 71 are respectively arranged on the center line L in the base portion 71. The two base portion side ribs 78 are respectively connected to the central portion of the base portion side bulging portion 74 in the air flow direction. Thereby, the same effect as the eleventh embodiment can be obtained.

(Fifteenth embodiment)
Next, a fifteenth embodiment of the present invention is described with reference to FIG. The fifteenth embodiment is different from the twelfth embodiment in that a second base portion side rib 78a is provided. The same parts as those in the twelfth embodiment are denoted by the same reference numerals and the description thereof is omitted.

  FIG. 19 is a perspective view showing the insert 7 of the fifteenth embodiment. As shown in FIG. 19, a second base portion side rib 78a that protrudes outward in the tube stacking direction and extends substantially parallel to the insert longitudinal direction is provided at a portion of the base portion 71 where the base portion side rib 78 is not provided. It has been. In the present embodiment, the second base portion side rib 78a is formed in a substantially semicircular cross section.

  The second base portion side ribs 78a are provided one by one with the base portion side bulging portion 74 interposed therebetween. The two second base portion side ribs 78 a are respectively disposed on one side and the other side of the center line L of the base portion 71. Further, on each of one side and the other side of the center line L of the base portion 71, the second base portion side rib 78 a is disposed on the opposite side to the base portion side rib 78 with respect to the base portion side bulging portion 74. ing.

  As described above, the rigidity of the insert 7 in the tube stacking direction can be further increased by providing the second base portion side rib 78a in the portion of the base portion 71 where the base portion side rib 78 is not provided. . Thereby, it is possible to further improve the pressure resistance performance and the earthquake resistance performance.

  Further, by providing one second base portion side rib 78 a on each side of the base portion side bulging portion 74, the second base portion side rib 78 a is arranged in a wide range in the longitudinal direction of the insert 7. Can do. Furthermore, by arranging the two second base part side ribs 78a on one side and the other side of the center line L of the base part 71, the second base part can be provided in a wide range in the air flow direction of the insert 7. Side ribs 78 can be provided. Furthermore, on each of one side and the other side of the center line L of the base portion 71, the second base portion side rib 78 a is disposed on the opposite side of the base portion side rib 78 with respect to the base portion side bulging portion 74. Thus, the base portion side rib 78 or the second base portion side rib 78a can be provided in almost the entire region of the base portion 71. Accordingly, the rigidity of the insert 7 in the tube stacking direction can be further increased, and the pressure resistance performance and the earthquake resistance performance can be further improved.

(Sixteenth embodiment)
Next, a sixteenth embodiment of the present invention will be described with reference to FIG. The sixteenth embodiment is different from the fifteenth embodiment in that one end side of the second base portion side rib 78a is connected to the base portion side bulging portion 74. The same parts as those in the fifteenth embodiment are denoted by the same reference numerals and description thereof is omitted.

  FIG. 20 is a perspective view showing the insert 7 of the sixteenth embodiment. As shown in FIG. 20, one end side of the second base portion side rib 78 a is connected to the base portion side bulging portion 74. In the present embodiment, the base portion side rib 78 and the second base portion side rib 78a are arranged on the same straight line on one side and the other side of the center line L, respectively. The two second base portion side ribs 78a are respectively connected to one end and the other end of the base portion side bulging portion 74 in the air flow direction.

  As described above, by concentrating one end side of the second base portion side rib 78a to the base portion side bulging portion 74, stress is concentrated on the connecting portion between the base portion 71 and the base portion side bulging portion 74. This can be prevented more reliably.

(17th Embodiment)
Next, a seventeenth embodiment of the present invention will be described with reference to FIG. The same parts as those in the sixteenth embodiment are denoted by the same reference numerals and description thereof is omitted.

  FIG. 21 is a perspective view showing the insert 7 according to the seventeenth embodiment. As shown in FIG. 21, the base portion side rib 78 and the second base portion side rib 78 a are respectively connected to portions other than both ends of the base portion side bulging portion 74 in the air flow direction.

  More specifically, the base portion side rib 78 and the second base portion side rib 78a disposed on the upstream side of the center line L in the base portion 71 are air from the center line L in the base portion side bulged portion 74. It is connected to the upstream part of the flow. Further, the base part side rib 78 and the second base part side rib 78a arranged on the downstream side of the center line L in the base part 71 are downstream of the center line L in the base part side bulging part 74. It is connected to the part. Thereby, the same effect as that in the sixteenth embodiment can be obtained.

(Eighteenth embodiment)
Next, an eighteenth embodiment of the present invention will be described with reference to FIG. The eighteenth embodiment is different from the fourteenth embodiment in that a second base portion side rib 78a is provided. The same parts as those in the fourteenth embodiment are given the same reference numerals and the description thereof is omitted.

  FIG. 22 is a plan view showing the insert 7 in the eighteenth embodiment. As shown in FIG. 22, a second base portion side rib 78a that protrudes outward in the tube stacking direction and extends substantially parallel to the insert longitudinal direction is provided at a portion of the base portion 71 where the base portion side rib 78 is not provided. It has been. The second base portion side ribs 78a are provided one by one with the base portion side bulging portion 74 interposed therebetween. The two second base portion side ribs 78 a are respectively disposed on one side and the other side of the center line L of the base portion 71.

  In the present embodiment, the two second base portion side ribs 78 a are respectively connected to the other end side (the side not connected to the base portion bulging portion 74) of the two base portion side ribs 78. More specifically, the second base portion side rib 78a disposed on the upstream side of the center line L in the base portion 71 is connected to the surface of the base portion side rib 78 on the upstream side of the air flow. Further, the second base portion side rib 78 a disposed on the downstream side of the center line L in the base portion 71 is connected to the surface of the base portion side rib 78 on the downstream side of the air flow.

  As described above, the rigidity of the insert 7 in the tube stacking direction can be further increased by providing the second base portion side rib 78a in the portion of the base portion 71 where the base portion side rib 78 is not provided. It becomes. Thereby, it is possible to further improve the pressure resistance performance and the earthquake resistance performance.

(Nineteenth embodiment)
Next, a nineteenth embodiment of the present invention will be described with reference to FIGS. The same parts as those in the fifth embodiment are denoted by the same reference numerals and description thereof is omitted.

FIG. 23 is a perspective view showing the insert 7 in the nineteenth embodiment. As shown in FIG. 23, in the base portion 71 of the insert 7, a first notch 76 is notched from one end to the other end in the air flow direction so as to be inclined with respect to the air flow direction. Is formed by. The first notch 76 is also formed continuously on the side rib 72. That is, the inclination angle θ _{1 of} the portion formed in the base portion 71 of the first cutout portion 76 with respect to the air flow direction is equal to the tube lamination of the portion formed in the side rib 72 of the first cutout portion 76. It is equal to the inclination angle θ ₂ with respect to the direction. Moreover, the both ends of the 1st notch part 76 are each arrange | positioned in the surface of a pair of side rib 72, For this reason, the side rib 72 is not divided completely.

  The pair of side ribs 72 are respectively formed with second notches 79 that are notched inward from the outer ends in the tube stacking direction. Only one end side of the second notch 79 is open, and in the present embodiment, the other end of the second notch 79 (the unopened end) is the surface of the side rib 72. Is placed inside. The second notch 79 is formed substantially in parallel with the first notch 76.

  In the present embodiment, in the longitudinal direction of the insert, the second notch 79 formed in the side rib 72 on the downstream side of the air flow (hereinafter referred to as the downstream second notch 79b) is the first notch. When viewed from the portion 76, it is provided on the same side as the second notch 79 (hereinafter referred to as the upstream second notch 79 a) formed in the side rib 72 on the upstream side of the air flow. That is, in the insert longitudinal direction, the downstream second notch 79b is disposed on the same side as the upstream notch 79a with respect to the first notch 76. Yes.

  FIG. 24 is a schematic plan view showing the insert 7 before the side rib 72 is bent in the nineteenth embodiment. As shown in FIG. 24, in this embodiment, the first and second cutout portions 76 and 79 are formed simultaneously with the press molding of the insert 5. And the side rib 72 is shape | molded by bend | folding the transversal direction both ends of the insert 7 in which the 1st, 2nd notch parts 76 and 79 were shape | molded in the same direction, Thereby, the insert 7 shown by FIG. Complete.

  As described above, the first notch 76 is extended to the side rib 72, and both end portions of the first notch 76 are arranged in the plane of the pair of side ribs 72, respectively. Since the rib 72 is not completely cut, it is possible to avoid lowering the rigidity of the insert 7 more than necessary. As a result, it is possible to reliably ensure the pressure resistance performance and the earthquake resistance performance.

  By the way, since the both ends of the 1st notch part 76 are each arrange | positioned in the surface of a pair of side rib 72, it becomes difficult to absorb the stress which arises in an insert longitudinal direction. Therefore, by setting a second notch portion 79 that is notched substantially parallel to the first notch portion 76 from the outer end of the side rib 72 in the tube stacking direction in the insert 7, The generated stress can be easily absorbed. Thereby, it becomes possible to reduce thermal distortion more.

  Further, when the insert 7 is press-molded, the first and second cutout portions 76 and 79 may be formed in advance, so that the insert 7 is brazed together with the tube 2 and the fins 3 and the core portion 4 is attached. After the molding, the step of cutting the insert 7 and molding the notch becomes unnecessary. For this reason, it becomes possible to improve a moldability.

(20th embodiment)
Next, a twentieth embodiment of the present invention will be described with reference to FIG. 20th Embodiment differs in the site | part by which the other end of the 2nd notch part 79 in the insert 7 is arrange | positioned compared with the said 19th Embodiment. The same parts as those in the nineteenth embodiment are denoted by the same reference numerals and description thereof is omitted.

  FIG. 25 is a perspective view showing the insert 7 in the twentieth embodiment. As shown in FIG. 25, the other end of the second notch 79 (the end on the unopened side) is disposed in the plane of the base portion 71 of the insert 7. Thereby, the same effect as in the nineteenth embodiment can be obtained.

(21st Embodiment)
Next, a twenty-first embodiment of the present invention will be described with reference to FIG. The twenty-first embodiment differs from the twentieth embodiment in the arrangement of the second notch 79. The same parts as those in the twentieth embodiment are given the same reference numerals and the description thereof is omitted.

  FIG. 26 is a perspective view showing the insert 7 in the twenty-first embodiment. As shown in FIG. 26, in the insert longitudinal direction, the downstream second notch 79b is provided on the opposite side of the upstream second notch 79a when viewed from the first notch 76. Yes. That is, in the insert longitudinal direction, the downstream second notch 79b is disposed on the opposite side of the first notch 76 from the upstream second notch 79a. Yes. Thereby, the same effect as that of the twentieth embodiment can be obtained.

(Twenty-second embodiment)
Next, a twenty-second embodiment of the present invention is described with reference to FIG. The twenty-second embodiment differs from the twenty-first embodiment in that a third notch 80 is provided. The same parts as those in the twenty-first embodiment are denoted by the same reference numerals and the description thereof is omitted.

  FIG. 27 is a perspective view showing the insert 7 in the twenty-second embodiment. As shown in FIG. 27, the pair of side ribs 72 are respectively formed with third notches 80 that are notched inward from the outer ends in the tube stacking direction. Only one end side of the third cutout portion 80 is opened. In the present embodiment, the other end of the third cutout portion 80 (the end portion on the side not opened) is the surface of the side rib 72. Is placed inside. The third cutout 80 is formed substantially parallel to the first and second cutouts 76 and 79.

  In the present embodiment, the third notch 80 (hereinafter referred to as the upstream third notch 80a) formed in the side rib 72 on the upstream side of the air flow is formed on the upstream second notch 79a. In contrast, it is disposed on the opposite side of the first notch 76. In addition, a third notch 80 (hereinafter referred to as a downstream third notch 80 b) formed in the side rib 72 on the downstream side of the air flow is downstream of the first notch 76. It arrange | positions on the opposite side to 2 notch part 79b. The third cutout 80 is also formed simultaneously with the press molding of the insert 5.

  As described above, the insert 7 is provided with the second and third cutout portions 79 and 80 cut out substantially in parallel with the first cutout portion 76 from the outer end of the side rib 72 in the tube stacking direction. By setting, the stress generated in the insert longitudinal direction can be more easily absorbed. Thereby, it becomes possible to further reduce thermal distortion.

(Other embodiments)
In each of the above embodiments, the embodiment in which the present invention is applied to the cross-flow type radiator 1 in which the cooling water flows in the horizontal direction has been described. However, the present invention is applied to a down-flow type radiator in which the cooling water flows in the vertical direction. It can also be applied.

  Moreover, although each said embodiment demonstrated the example in which the stress absorption part in the insert 7 is a non-contact state with the core part 4, not only this but the stress absorption part in the insert 7 is in contact with the core part 4 You may do it.

  Moreover, in the said 7th and 8th embodiment, although the three cut | notch parts 76 were formed in the base part 71, you may form not only this but two or four or more.

  Similarly, in the ninth embodiment, four cut portions 76 are formed in the base portion 71. However, the present invention is not limited to this, and two, three, or five or more may be formed.

  Moreover, in the said 11th-18th embodiment, although the base part side rib 78 was formed in cross-sectional substantially semicircle shape, you may form not only in this but in other shapes, such as cross-sectional triangle shape and cross-sectional rectangle shape. .

  Similarly, in the fifteenth to eighteenth embodiments, the second base portion side rib 78a is formed in a substantially semicircular cross section, but is not limited thereto, and is formed in other shapes such as a triangular shape and a rectangular shape in cross section. May be.

It is a front view of radiator 1 concerning a 1st embodiment. (A) is a top view which shows the insert 7 in 1st Embodiment, (b) is a front view of Fig.2 (a). (A) is a top view which shows the insert 7 in 2nd Embodiment, (b) is a front view of Fig.3 (a). (A) is a top view which shows the insert 7 in 3rd Embodiment, (b) is a front view of Fig.4 (a). (A) is a top view which shows the insert 7 in 4th Embodiment, (b) is a front view of Fig.5 (a). (A) is a top view which shows the insert 7 in 5th Embodiment, (b) is a front view of Fig.6 (a). (A) is a top view which shows the insert 7 in 6th Embodiment, (b) is a front view of Fig.7 (a). (A) is a top view which shows the insert 7 in 7th Embodiment, (b) is a front view of Fig.8 (a). (A) is a top view which shows the insert 7 in 8th Embodiment, (b) is a front view of Fig.9 (a). (A) is a top view which shows the insert 7 in 9th Embodiment, (b) is a front view of Fig.10 (a). (A) is a top view which shows the insert 7 in 10th Embodiment, (b) is a front view of Fig.11 (a). It is a perspective view which shows the insert 7 in 10th Embodiment. It is a perspective view which shows the insert 7 in 11th Embodiment. (A) is an A arrow directional view of FIG. 13, (b) is BB sectional drawing of FIG. 13, (c) is CC sectional drawing of FIG. It is a perspective view which shows the insert 7 in 12th Embodiment. 15A is a cross-sectional view taken along the arrow D in FIG. 15, FIG. 15B is a cross-sectional view taken along the line EE in FIG. 15, and FIG. It is a perspective view which shows the insert 7 in 13th Embodiment. It is a perspective view which shows the insert 7 in 14th Embodiment. It is a perspective view which shows the insert 7 in 15th Embodiment. It is a perspective view which shows the insert 7 in 16th Embodiment. It is a perspective view which shows the insert 7 in 17th Embodiment. It is a top view which shows insert 7 in 18th Embodiment. It is a perspective view which shows the insert 7 in 19th Embodiment. It is a schematic plan view which shows the insert 7 before bending the side rib 72 in 19th Embodiment. It is a perspective view which shows the insert 7 in 20th Embodiment. It is a perspective view which shows the insert 7 in 21st Embodiment. It is a perspective view which shows the insert 7 in 22nd Embodiment.

Explanation of symbols

  2 ... Tube, 4 ... Core part, 5 ... Header tank, 7 ... Insert, 71 ... Base part, 72 ... Side rib, 73a, 73b ... Notch part, 74 ... Base part side bulging part (stress absorbing part), 75 ... Slit, 76 ... Notched portion (stress absorbing portion), 77 ... Side rib side bulged portion (stress absorbing portion), 78 ... Base portion side rib (projecting portion), 78a ... Second base portion side rib, 79 ... second notch.

Claims (25)

A core portion (4) having a plurality of tubes (2) through which a heat medium flows;
A header tank (5) extending in a direction perpendicular to the longitudinal direction of the tube (2) at both longitudinal ends of the tube (2) and communicating with the tube (2);
The core portion (4) is disposed substantially in parallel with the longitudinal direction of the tube (2) so as to come into contact with the core portion (4) at the end portion, and heat is transferred from the core portion (4), A heat exchanger comprising an insert (7) supported by the header tank (5),
The tube (2) has a flat cross-sectional shape along the air flow direction,
The flat portions on both sides of the tube (2) are joined to the tops of the corrugated fins (3),
The insert (7) comes into contact with the top of the wavy fin (3) located at the end of the core (4),
The insert (7) is formed with stress absorbing portions (74, 76, 77) that absorb stress generated in the longitudinal direction of the insert (7).
The stress absorbing portion (74, 76, 77) is provided to be inclined with respect to the air flow direction from the air flow upstream side to the downstream side of the insert (7),
An end on the most upstream side of the air flow and an end on the most downstream side of the air flow in the stress absorbing portion (74, 76, 77) are arranged so as not to overlap each other in the air flow direction. Heat exchanger. A core portion (4) having a plurality of tubes (2) through which a heat medium flows;
A header tank (5) extending in a direction perpendicular to the longitudinal direction of the tube (2) at both longitudinal ends of the tube (2) and communicating with the tube (2);
The core portion (4) is disposed substantially in parallel with the longitudinal direction of the tube (2) so as to come into contact with the core portion (4) at the end portion, and heat is transferred from the core portion (4), A heat exchanger comprising an insert (7) supported by the header tank (5),
The tube (2) has a flat cross-sectional shape along the air flow direction,
The insert (7) includes a base portion (71) having a surface substantially parallel to the flat surface of the tube (2) and extending substantially parallel to the longitudinal direction of the tube (2), and the base portion (71). A pair of side ribs (72) projecting from both ends of the air flow direction in a direction substantially orthogonal to the base portion (71) and extending substantially parallel to the longitudinal direction of the tube (2);
The base part (71) is formed with a base part side bulging part (74) in which a cross section of the base part (71) swells in a substantially U shape,
The base part side bulging part (74) is provided from the air flow upstream side to the downstream side of the insert (7),
The end on the most upstream side of the air flow and the end on the most downstream side of the air flow in the base side bulging portion (74) are arranged so as not to overlap each other in the air flow direction ,
A stress absorbing part that absorbs stress generated in the longitudinal direction of the insert (7 ) is constituted by the base part side bulging part (74),
Cut portions (73a, 73b) are formed in portions of the side ribs (72) corresponding to the most upstream end and the most downstream end of the base portion side bulging portion (74), respectively. heat exchanger, characterized in that there. A core portion (4) having a plurality of tubes (2) through which a heat medium flows;
A header tank (5) extending in a direction perpendicular to the longitudinal direction of the tube (2) at both longitudinal ends of the tube (2) and communicating with the tube (2);
The core portion (4) is disposed substantially in parallel with the longitudinal direction of the tube (2) so as to come into contact with the core portion (4) at the end portion, and heat is transferred from the core portion (4), A heat exchanger comprising an insert (7) supported by the header tank (5),
The tube (2) has a flat cross-sectional shape along the air flow direction,
The insert (7) has a base portion (71) having a surface substantially parallel to the flat surface of the tube (2) and extending substantially parallel to the longitudinal direction of the tube (2),
The base part (71) is formed with a base part side bulging part (74) in which a cross section of the base part (71) swells in a substantially U shape,
The base part side bulging part (74) is provided from the air flow upstream side to the downstream side of the insert (7),
The end on the most upstream side of the air flow and the end on the most downstream side of the air flow in the base side bulging portion (74) are arranged so as not to overlap each other in the air flow direction ,
A stress absorbing part that absorbs stress generated in the longitudinal direction of the insert (7 ) is constituted by the base part side bulging part (74),
The base portion (71) is provided with a base portion side rib (78) that protrudes outward in the tube stacking direction and extends substantially parallel to the longitudinal direction of the insert (7).
One end side of the base part side rib (78) is connected to the base part side bulging part (74), The heat exchanger characterized by the above-mentioned. The flat portions on both sides of the tube (2) are joined to the tops of the corrugated fins (3),
Heat according to claim 2 or 3, characterized in that the insert (7) is adapted to contact the top of the undulating fin (3) located at the end of the core (4). Exchanger. The heat exchanger according to any one of claims 2 to 4, wherein the base portion side bulging portion (74) is inclined with respect to the air flow direction. The base portion side bulging portion (74) is divided into a plurality of air flow directions,
It said plurality of base portion-side expansion (74), any one of claims 2 to 5, characterized in that it is connected via a slit (75) formed in the base portion (71) The heat exchanger as described in. The heat exchanger according to claim 6 , wherein the plurality of base portion side bulge portions (74) are not arranged on the same straight line. It said plurality of base portion-side expansion (74) A heat exchanger according to claim 6 or 7, characterized in that they are inclined in different directions with respect to the air flow direction. It said plurality of base portion-side expansion (74) is substantially parallel with respect to the air flow direction, and, according to claim 6 or 7, characterized in that it is arranged so as not to overlap each other in the direction of air flow The heat exchanger as described in. Before SL insert (7), the longitudinal and the base portion extending substantially parallel to the tube the tube has a substantially plane parallel to the flat surface of the (2) (2) and (71), said base portion (71) And a pair of side ribs (72) extending in a direction substantially orthogonal to the tube (2) and extending substantially parallel to the longitudinal direction of the tube (2),
2. The heat exchanger according to claim 1, wherein the stress absorbing portion is a notched portion (76) cut out in the base portion (71) so as to be inclined with respect to the air flow direction. 11. The heat exchanger according to claim 10 , wherein only one end side of the notch is opened. The heat exchanger according to claim 10 or 11 , wherein a plurality of the notches (76) are provided. A plurality of the notches (76) are provided, and only one end side is opened,
11. The heat according to claim 10 , wherein the open ends of the plurality of notches are arranged alternately on the upstream side and the downstream side of the air flow in the base part. Exchanger. The heat exchanger according to claim 12 or 13 , wherein the plurality of notches (76) are inclined in different directions with respect to the air flow direction. The portion adjacent to the notch (76) in front Symbol pair of side ribs (72), said side ribs (72) cross-section side ribs side bulge bulging direction of air flow in a substantially U shape (77) is formed,
The heat exchanger according to claim 10 , wherein the stress absorbing part includes the side rib side bulging part (77). The insert (7) is provided with a protrusion (78) protruding outward in the tube stacking direction,
The protrusion (78) A heat exchanger according to any one of claims 1, 10 to 15, characterized in that it is connected to the stress absorbing portions (74, 76, 77). The insert (7) protrudes from both ends of the base portion (71) in the air flow direction in a direction substantially orthogonal to the base portion (71) and extends substantially parallel to the longitudinal direction of the tube (2). Side ribs (72),
Cut portions (73a, 73b) are formed in portions of the side ribs (72) corresponding to the most upstream end and the most downstream end of the base portion side bulging portion (74), respectively. The heat exchanger according to claim 3 , wherein The heat exchanger according to claim 3 or 17 , wherein the base part side ribs (78) are provided one by one with the base part side bulging part (74) interposed therebetween. The base part-side rib (78) includes one side and the other side in the air flow direction with respect to a center line (L) crossing the center of the base part (71) in the air flow direction in the longitudinal direction of the insert (7). The heat exchanger according to claim 18 , wherein the heat exchanger is disposed respectively. The base part side ribs (78) are provided one by one with the base part side bulging part (74) in between, and the center of the base part (71) in the air flow direction is the insert (7). 18. The heat exchanger according to claim 3 , wherein the heat exchanger is disposed on a center line (L) crossing in a longitudinal direction of the heat exchanger. The base portion (71) is provided with a second base portion side rib (78a) protruding outward in the tube stacking direction and extending substantially parallel to the longitudinal direction of the insert (7). The heat exchanger according to any one of claims 3, 17 to 20 . The base portion (71) is provided with a second base portion side rib (78a) protruding outward in the tube stacking direction and extending substantially parallel to the longitudinal direction of the insert (7).
The second base portion side ribs (78a) are provided one by one with the base portion side bulging portion (74) in between, and the center of the base portion (71) in the air flow direction is the insert. (7) are arranged on one side and the other side in the air flow direction with respect to the center line (L) crossing in the longitudinal direction,
The second base part side rib (78a) is located on the base part side bulged part (74) on the one side and the other side in the air flow direction with respect to the center line (L) . The heat exchanger according to claim 19 , wherein the heat exchanger is arranged on the side opposite to the part-side rib (78). The heat exchanger according to claim 22 , wherein one end side of the second base part side rib (78a) is connected to the base part side bulging part (74). The base portion side ribs (78) are provided one by one with the base portion side bulging portion (74) interposed therebetween, and are arranged on the same straight line.
The base portion (71) is provided with a second base portion side rib (78a) protruding outward in the tube stacking direction and extending substantially parallel to the longitudinal direction of the insert (7).
The second base portion side ribs (78a) are provided one by one with the base portion side bulging portion (74) interposed therebetween, and are connected to the base portion side ribs (78), respectively. The heat exchanger according to claim 3 or 17 , wherein: The notch (76) extends to the side rib (72),
Both ends of the notch (76) are respectively disposed in the plane of the pair of side ribs (72),
The insert (7) has a second notch (79) cut out substantially in parallel with the notch (76) from the outer end of the side rib (72) in the tube stacking direction. Has been
The heat exchanger according to claim 10 , wherein the second notch (79) is open only at one end side.

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