CN100498190C - Heat exchanger - Google Patents

Abstract

A heat exchanger comprising tubes (10) and vessels (2, 3). The tubes (10) extend in a first direction (X) and are stacked in a second direction (Y). The containers (2, 3) have tube insertion plate parts (22) and are provided at the ends of the tubes (10). The tube insertion plate part (22) has a tube hole (221) into which the tube (10) is inserted and a rib (223) in a first direction (X) and a second direction (Y) close to vertical extends in the third direction (Z). The tube hole (221) has an end in the third direction (Z). The rib (223) is arranged to overlap the end of the tube hole (221) in the second direction (Y) and provides a deformable member (224) deformable in the first direction (X). The deformable part (224) is located outside the rib part (223) in the tube insertion plate part (22) in the third direction (Z).

Description

heat exchanger

technical field

The invention relates to a heat exchanger, which can be used, for example, in a radiator.

Background technique

Conventionally, a heat exchanger includes a plurality of tubes and a plurality of corrugated fins stacked alternately to form a core member. The heat exchanger also includes containers arranged at the longitudinal ends of the tubes. Each container includes a core plate having tube holes through which tubes are inserted, and a container body secured to the core plate to provide a space in the container with the core plate. The core plate has a first wall part (tube insertion plate part) with tube holes. A second wall member is formed at an outer peripheral portion of the first wall member, the second wall member being disposed approximately perpendicular to the first wall member. In addition, two inserts (side plates) are provided at both ends of the core member in the stacking direction of the stacked tubes and corrugated fins.

In this heat exchanger, when the temperature of the tube 310 is different from that of adjacent tubes, as shown in FIG. Stress can thereby be concentrated at the base of the tube 310, that is, the end of the tube 310 that is the bending point in the width direction (ie, direction Z).

For example, JP-A-2000-213889 discloses a heat exchanger having a plurality of ribs provided on a first wall member of a core plate nearly parallel to a plurality of A plurality of tube holes into which tubes are inserted. In addition, both ends of each rib are connected to the second wall part of the core plate for increasing the rigidity of the core plate and limiting the stress at the end of the tube in the width direction of the tube (the main direction of the tube) concentrated.

However, when the core plate has ribs, the core plate is hardly deformed in the tube width direction, so that high stress can be generated on the tube in the tube width direction. Furthermore, when the end portion of the rib-shaped portion is connected to the second wall member of the core plate, the length of the rib-shaped portion in the tube width direction is long. Thus, when the core plate is formed by press working, the formability of the ribs decreases.

Furthermore, Figure 20 shows a heat exchanger with a plurality of burring parts J221a. As shown in FIG. 20, a burr member J221a is provided at inner peripheral edges of a tube hole J221 into which a tube is inserted and an insertion hole J222 into which an insert is inserted. The burr member J221a has a tubular shape protruding inside the container. Therefore, the rigidity of the core board J20 is increased.

In general, the rigidity of the core plate becomes greater when the protrusion size of the rib and the burr part from the first wall part of the core plate is large. However, when the protrusion sizes of the rib and burr members are large, the formability of the rib and burr members decreases.

Contents of the invention

In view of the above problems, an object of the present invention is to provide a heat exchanger that can limit stress concentration at tube ends in the tube width direction (tube main direction) while improving the formability of the core plate .

A heat exchanger according to a first aspect of the present invention includes a plurality of tubes and vessels. Each of the tubes has a flat shape, extends in a first direction, and is stacked in a second direction. The container has a tube insertion plate member and is disposed at ends of the plurality of tubes in a first direction to communicate with the plurality of tubes. The tube insertion plate member has a plurality of tube holes into which a plurality of tubes are inserted, and a plurality of ribs each extending in a third direction approximately perpendicular to the first direction and the second direction. . Each of the plurality of ribs has a shorter length in the third direction than each of the plurality of tube holes. The tube hole has first and second hole ends in a third direction. The rib is provided in the tube insertion plate member so as to overlap at least one of the first and second hole ends in the second direction and provides a deformable member deformable in the first direction. The deformable member is located outside the rib-shaped portion in the tube insertion plate member in the third direction.

When the temperature of one tube is different from that of the adjacent tube, the rib restricts deformation of the tube hole portion, thereby limiting stress concentration at the end of the tube in the third direction. Furthermore, the thermal strain of the tube is absorbed by the deformation of the deformable part. In addition, the length of the rib-shaped portion in the third direction is short, thereby improving the formability of the rib-shaped portion.

A heat exchanger according to a second aspect of the present invention includes a plurality of tubes and vessels. Each of the tubes has a flat shape, extends in a first direction, and is stacked in a second direction. The container has a tube insertion plate member and is disposed at ends of the plurality of tubes in a first direction to communicate with the plurality of tubes. The tube insertion plate member has a plurality of tube holes into which a plurality of tubes are inserted, and a plurality of ribs each extending in a third direction approximately perpendicular to the first direction and the second direction. . The tube hole has first and second hole ends in a third direction. The rib-shaped portion is provided in the tube insertion plate member to protrude to the outside by a predetermined length in the third direction, compared with at least one of the first and second hole end portions, and provides a predetermined length in the first direction. Deformable deformable parts. The deformable member is located outside the rib-shaped portion in the tube insertion plate member in the third direction. Also, the predetermined length is set approximately within a range of 4 to 8 mm.

When compared with at least one of the first and second hole ends of the tube hole, the rib protrudes to the outside by a predetermined length in the third direction, wherein the predetermined length is approximately in the range of 4 to 8 mm , the rib restricts the stress concentration at the end of the tube hole in the third direction. Furthermore, the thermal strain of the tube is absorbed by the deformation of the deformable part located outside the rib.

A heat exchanger according to a third aspect of the present invention includes a plurality of tubes and vessels. Each of the tubes has a flat shape, extends in a first direction, and is stacked in a second direction. The container has a tube insertion plate member and is disposed at ends of the plurality of tubes in a first direction so as to communicate with the plurality of tubes. The tube insertion plate member has a plurality of tube holes into which the plurality of tubes are inserted, and a plurality of ribs provided in the tube holes in a third direction approximately perpendicular to the first direction and the second direction. outside the end.

In this case, the stress generated near the end of the tube hole in the width direction of the tube (corresponding to the third direction approximately perpendicular to the first and second directions) is dispersed to the rib, thereby making the rib Deformation of the ends of the tube holes due to temperature differences of the tubes is limited. Therefore, stress concentration at the end of the tube in the width direction of the tube is restricted. In addition, the length of the rib-shaped portion in the width direction of the pipe becomes short, thereby improving the formability of the rib-shaped portion.

A heat exchanger according to a fourth aspect of the present invention includes a core member and a container. The core member includes a plurality of tubes each having a flat shape, extending in a first direction, and stacked in a second direction. The container is disposed at ends of the plurality of tubes in a first direction, and has a core plate connected to the plurality of tubes, and a container body disposed to form a container space with the core plate. The core plate has a tube insertion plate member having a plurality of tube holes and a plurality of burr members located on inner peripheral edges of at least a part of the tube holes. The tubes are respectively inserted in the tube holes to communicate with the container space. The burr member protrudes in a first direction. In addition, the inner peripheral edge has a trimmed portion that trims and removes a portion of the bruise member.

The rigidity in the area around the tube hole in the tube insertion plate part is increased by the burr part. Therefore, when strain is generated in the tube, the burr member restricts deformation of the tube hole end in the tube width direction, thereby restricting stress concentration at the end of the tube in the tube width direction.

A heat exchanger according to a fifth aspect of the present invention includes a core member, a container, and an insert. The core member includes a plurality of tubes each having a flat shape, extending in a first direction, and stacked in a second direction. The container is disposed at ends of the plurality of tubes in a first direction, and has a core plate connected to the plurality of tubes, and a container body disposed to form a container space with the core plate. The insert is disposed near the end of the core part parallel to the first direction, and the end of the insert is connected to the core plate to reinforce the core part. The core plate has a tube insertion plate member having a plurality of tube holes, insertion holes, and a plurality of burr members. The tubes are respectively inserted in the tube holes to communicate with the container space. The insert is inserted into the insertion hole to be connected to the core board. The burr member protrudes in the first direction and is provided only at the inner peripheral edge of the tube hole.

Typically, the thickness of the insert is greater than the thickness of the tube, making it difficult for the insert to fail due to stress concentrations. Therefore, when the burr member is provided at only a part of the inner peripheral edge of the tube hole, stress concentration of the tube at the end in the tube width direction is restricted while improving the formability of the core plate.

Description of drawings

Other objects and advantages of the present invention will become more apparent from the following detailed description of preferred embodiments with reference to the accompanying drawings. In the picture:

1 is a front view showing a heat exchanger according to a first embodiment of the present invention;

2 is a perspective cross-sectional view showing a vessel, a core plate and tubes in a heat exchanger according to a first embodiment of the present invention;

3A is a front view of a core board according to the first embodiment;

Figure 3B is a bottom view of the core board according to the first embodiment;

Figure 4 is a cross-sectional view of the core plate taken along line IV-IV in Figure 3B;

Figure 5 is a cross-sectional view of the core plate taken along the line V-V in Figure 3B;

6 is a schematic diagram showing a part of a core plate in a heat exchanger according to a second embodiment of the present invention;

7 is a schematic diagram showing a part of a core plate in a heat exchanger according to a third embodiment of the present invention;

8 is a schematic diagram showing a part of a core plate in a heat exchanger according to a fourth embodiment of the present invention;

9A is a front view of a core plate in a heat exchanger according to a fifth embodiment of the present invention;

9B is a bottom view of a core plate in a heat exchanger according to a fifth embodiment of the present invention;

Figure 10 is a cross-sectional view of the core plate taken along line X-X in Figure 9B;

11 is a bottom view showing a part of a core plate in a heat exchanger according to a sixth embodiment of the present invention;

Figure 12 is a cross-sectional view of the core plate taken along line XII-XII in Figure 11;

13 is a cross-sectional view of a core plate taken along a line in the width direction of a tube in a heat exchanger according to a seventh embodiment of the present invention;

14 is a bottom view showing a part of a core plate in a heat exchanger according to an eighth embodiment of the present invention;

15 is a bottom view showing a part of a core plate in a heat exchanger according to a ninth embodiment of the present invention;

16 is a bottom view showing a part of a core plate in a heat exchanger according to a tenth embodiment of the present invention;

Figure 17 is a cross-sectional view of the core plate taken along line XVII-XVII in Figure 16;

18 is a graph showing the relationship between the protruding length L4 of the rib in the core plate and the stress ratio at the end of the tube in the main direction of the tube compared to the case without any rib;

19 is a schematic diagram showing a core plate and tubes in a heat exchanger according to the related art; and

Fig. 20 is a cross-sectional view of a core plate in a heat exchanger according to the related art.

Detailed ways

(first embodiment)

The heat exchanger according to the first embodiment of the present invention can be used for a radiator, for example, for cooling a water-cooled internal combustion engine. As shown in Fig. 1, the heat exchanger comprises a core member 1 having an approximately rectangular solid shape. The core member 1 includes a plurality of tubes 10 and a plurality of corrugated fins 11 which are optionally stacked in the up-down direction (tube stacking direction Y) in FIG. 1 .

The corrugated fins 11 have a corrugated shape and are made of aluminum alloy, for example. The corrugated fins 11 are provided to accelerate heat exchange between air and cooling water (coolant). The pipe 10 defines a water passage through which cooling water for a water-cooled internal combustion engine (not shown) flows. For example, the pipe 10 is made of an aluminum alloy sheet, for example, bent into a predetermined shape, and welded or brazed.

In the heat exchanger of FIG. 1 , the longitudinal direction of the tube 10 (ie, the longitudinal direction X of the tube, the first direction) approximately corresponds to the horizontal direction (right-left direction). As shown in Fig. 2, the tube 10 has a flat shape in cross-section such that the main direction Z of the tube approaches the direction C corresponding to the air flow. The main direction Z of the tubes is approximately perpendicular to the longitudinal direction X of the tubes and to the stacking direction Y (second direction) of the tubes.

As shown in FIG. 2, each tube 10 includes a pair of opposing straight portions 10a and a pair of opposing curved portions 10b. The pair of straight portions 10a has a straight shape in a cross-section approximately perpendicular to the longitudinal direction X of the pipe, and is elongated and arranged approximately parallel to the main direction Z of the pipe. The pair of arcuate portions 10b has an arcuate shape in a cross-section approximately perpendicular to the longitudinal direction X of the pipe, and is arranged to connect the ends of the pair of straight portions 10a in the main direction Z of the pipe.

The first container 2 and the second container 3 are arranged at both ends of the tube 10 in the longitudinal direction X of the tube. Container 2 and container 3 extend to a direction approximately perpendicular to the longitudinal direction X of the tube and have spaces therein. Both ends of the tube 10 in the tube longitudinal direction X are inserted into tube holes 221 provided in the container 2 and the container 3 so that the inner channel of the tube 10 communicates with the space in the container 2 and the container 3 .

The first container 2 is provided for distributing hot cooling water from the engine to the pipes 10 . The first container 2 has an inlet pipe 2a connected to the cooling water outlet of the internal combustion engine through a first hose (not shown).

The second container 3 is provided for collecting cooling water cooled by heat exchange with air. The cooling water flowing out of the second container 3 is circulated to the engine. The second container 3 has an outlet pipe 3a connected to the cooling water inlet of the internal combustion engine through a second hose (not shown).

At both ends of the core part 1 in the stacking direction Y of the tubes, two inserts 4 (side plates) are provided for reinforcing the core part 1 . For example, the insert 4 is made of aluminum alloy. The insert 4 extends to a direction approximately parallel to the longitudinal direction X of the pipe, and the ends of the insert 4 in the longitudinal direction X of the pipe are connected to the containers 2 and 3 . The insert 4 may have a greater thickness than the tube 10 .

As shown in Figure 2, each of the containers 2 and 3 includes a core plate 20 in which the tube 10 and the insert 4 are inserted, a container body 21 for forming a container space 2b with the core plate 20, and a seal (not shown). out).

For example, the core plate 20 is made of aluminum alloy, the container body 21 is made of resin (for example, glass fiber reinforced nylon 66), and the seal is made of rubber. The seal is placed between the core plate 20 and the container body 21, and the plurality of protrusions 251 of the core plate 20 are pressed against the container body 21, so that the protrusions 251 are plastically deformed, and the container body 21 is fixed to the core plate 20.

As shown in FIGS. 3A to 5 , the core plate 20 has a tube insertion plate part 22 to which the tubes 10 are connected. At the entire circumference of the tube insertion plate member 22, a groove 20a having a nearly rectangular shape is provided. When the container body 21 and the core plate 20 are fixed, the end of the container body 21 and the seal are inserted into the groove 20a.

The groove 20 a is formed with an inner wall 23 , a bottom wall 24 and an outer wall 25 . The inner wall 23 is bent approximately vertically from the outer peripheral portion of the tube insertion plate member 22, and protrudes from the bottom wall 24 in the longitudinal direction X of the tube. The bottom wall 24 is bent approximately perpendicularly from the inner wall 23 and extends in the stacking direction Y of the tubes or in the main direction Z of the tubes. The outer wall 25 is bent approximately perpendicularly from the bottom wall 24 and protrudes from the bottom wall 24 in the longitudinal direction X of the tube. A protrusion 251 is formed at an end of the outer wall 25 .

The tube insertion plate part 22 of the core plate 20 has a plurality of tube holes 221 in which the tubes 20 are inserted and brazed. Furthermore, the tube insertion plate part 22 has two insertion holes 222 into which the inserts 4 are inserted and brazed. Insertion holes 222 are provided at both ends of the tube insertion plate member 22 in the stacking direction Y of the tubes. For example, the tube hole 221 and the insertion hole 222 are formed into an elongated shape extending in the main direction Z of the tube by a punching process. In addition, the tube insertion plate part 22 may be provided with a plurality of burr parts 221 a provided on the inner peripheral edge of the tube hole 221 . For example, each burr member 221a has a tubular shape having a cross-section similar to that of the tube 10 and protruding to the inside of each container 2 and 3 (ie, protruding to the outside of the tube 10 in the longitudinal direction X of the tube).

Further, the tube insertion plate member 22 has a plurality of ribs 223 provided between adjacent tube holes 221 and between the tube holes 221 and the insertion holes 222 in the stacking direction Y of the tubes. The rib portion 223 has a convex shape extending in the main direction Z of the tube and protruding from the tube insertion plate member 22 to the outside of each of the containers 2 and 3 . For example, the rib portion 223 is formed by press working. When the portion between each adjacent tube hole 221 is set as an intermediate portion, all intermediate portions are provided with a pair of ribs 223 arranged in the main direction Z of the tube.

The length L1 of the rib portion 223 in the main direction Z of the pipe is set to be shorter than the length L2 of the pipe hole 221 in the main direction Z of the pipe. Further, when the tube insertion plate member 22 is viewed from the stacking direction Y of the tubes, the ends of the tube holes 221 in the main direction Z of the tubes overlap the ribs 223 . That is, the ends of the tube holes 221 in the main direction Z of the tubes overlap the ribs 223 in the stacking direction Y of the tubes.

In addition, the end of the rib 223 is away from the inner wall 23 . Accordingly, the tube insertion plate member 22 has two flat surfaces 224 located outside the tube hole 221 , the insertion hole 222 and the rib 223 in the main direction Z of the tube. The flat surface 224 extends all over the tube insertion plate member 22 in the stacking direction Y of the tubes. The flat surface 224 is a deformable part that is easily deformed in the longitudinal direction X of the pipe.

As described above, in the stacking direction Y of the tubes, the ends of the tube holes 221 in the main direction Z of the tubes and the rib-shaped portion 223 having high rigidity overlap each other with a gap therebetween. Therefore, when the temperature of one pipe 10 is different from the temperature of the adjacent pipe 10, the rib 223 prevents the deformation of the pipe hole 221 at the end of the main direction Z of the pipe, thereby restricting the end of the pipe 10 in the main direction Z of the pipe. stress concentration.

In addition, the flat surface 224 located outside the tube hole 221, the insertion hole 222, and the rib 223 is easily deformed in the longitudinal direction X of the tube. Therefore, when the temperature difference between the tubes 10 is large, the core plate 20 is deformed in the longitudinal direction X of the tubes due to the deformation of the flat surface 224 , and the thermal strain of the tubes 10 is absorbed by the deformation of the core plate 20 .

In addition, the length L1 of the rib 223 is set to a sufficient length so that the rib 223 reduces the deformation of the end of the tube hole 221 in the main direction Z of the tube. In addition, the length L1 of the rib-shaped portion 223 is set so that the formability of the rib-shaped portion 223 is improved.

When the ratio of the length L1 of the rib-shaped portion 223 to the length L2 of the tube hole 221 is set approximately in the range of 0.08≦(L1/L2)≦0.2, the rib-shaped portion 223 can sufficiently reduce the end portion of the tube hole 221. deformation while improving the formability of the rib 223.

In addition, the pair of ribs 223 is located between the adjacent tube holes 221 and insertion holes 222 in the stacking direction Y of the tubes. In other words, the ribs 223 are arranged adjacent to the ends of all the tube holes 221 which are adjacent in the stacking direction Y of the tubes, thereby limiting each end of all the tube holes 221 in the main direction Z of the tubes deformed.

(second embodiment)

In the core plate 20 of FIG. 3B , each intermediate portion between the tube hole 221 and the insertion hole 222 in the stacking direction Y of the tubes is provided with a pair of ribs 223 . Alternatively, a portion of the middle portion may be provided with pairs of ribs 223 . For example, as shown in FIG. 6 , first intermediate portions each provided with a pair of ribs 223 and second intermediate portions without any rib 223 may be alternately arranged in the stacking direction Y of the tubes. In other words, the paired ribs 223 may be alternately arranged in the middle portion in the stacking direction Y of the tubes.

Alternatively, one of the first intermediate portions provided with the paired ribs 223 and two of the second intermediate portions without any ribs 223 may be alternately arranged in the stacking direction Y of the tubes. In other words, the paired ribs 223 may be provided at one of every three adjacent intermediate portions in the stacking direction of the tubes. In this case, the number of ribs 223 is reduced, thereby improving the formability of the ribs 223 compared to the case where a pair of ribs 223 is provided at each intermediate portion.

(third embodiment)

In the core plate 20 of FIG. 3B , each intermediate portion between the tube hole 221 and the insertion hole 222 in the stacking direction Y of the tubes is provided with a pair of ribs 223 . Alternatively, each intermediate portion may be provided with a rib 223 on one end side of the tube hole 221 in the main direction Z of the tube. For example, as shown in FIG. 7 , one of the third intermediate portions having a rib 223 on the first end side of the tube hole 221 and one of the third intermediate portions on the second end side of the tube hole 221 may be alternatively provided. One of the fourth middle portions having a rib 223 . In this case, the first end side of the tube opening 221 is opposite the second end side of the tube opening 221 in the main direction Z of the tube. In this case as well, the number of ribs 223 is reduced, thereby improving the formability of the ribs 223 compared to the case where a pair of ribs 223 is provided at each intermediate portion.

(fourth embodiment)

In the core plate 20 of FIG. 3B , the ribs 223 are provided in such a manner that the ends of the tube holes 221 in the main direction Z of the tubes and the ribs 223 overlap each other in the stacking direction Y. However, the ends of the tube holes 221 in the main direction Z of the tubes and the ribs 223 in the stacking direction Y of the tubes need not overlap each other.

For example, the rib 223 may be provided outside the end of the tube hole 221 in the main direction Z of the tube to be aligned with the tube hole 221 in the main direction Z of the tube. As shown in Figure 8, each pair of ribs 223 may be aligned with each tube hole 221 with a distance in the main direction Z of the tube between said ribs and said tube hole.

Also in this case, stress generated near the end of the tube hole 221 in the main direction Z of the tube is dispersed to the rib 223 so that the rib 223 restricts deformation of the end of the tube hole 221 . As a result, stress concentration at both end portions of the tube 10 is restricted.

In this embodiment, the length L1 of the rib 223 in the main direction Z of the tube is short, so that the formability of the rib 223 is improved. Furthermore, even when the distance between adjacent tube holes 221 is small, the rib 223 is easily provided.

(fifth embodiment)

A core plate 20 for a heat exchanger according to a fifth embodiment of the present invention will be described with reference to FIGS. 9A-10 . The tube insertion plate part 22 of the core plate 20 has a plurality of burr parts 221 a provided on the inner peripheral edge of the tube hole 221 . Each burr member 221a is tubular having a cross-section similar to that of the tube 10 and protruding to the inside of each of the containers 2 and 3 (i.e. protruding to the outside of the tube 10 in the longitudinal direction X of the tube). . The rigidity of the area around the tube hole 221 in the tube insertion plate member 22 is increased by the burr member 221a. In contrast, the burr member 221 a is not provided in the insertion hole 222 .

Furthermore, the tube insertion plate member 22 has a plurality of ribs 223 provided between adjacent tube holes 221 and between the tube holes 221 and the insertion holes 222 . The rib portion 223 has a convex shape extending in the main direction Z of the tube and protruding from the tube insertion plate member 22 to the outside of each of the containers 2 and 3 . For example, the rib portion 223 is formed by press working.

The extension length L1 of the rib portion 223 is set to be longer than the length L2 of the tube hole 221 and the length of the insertion hole 222 in the main direction Z of the tube. Furthermore, the end of the rib 223 in the main direction Z of the tube is positioned outside the ends of the tube hole 221 and the insertion hole 222 in the main direction Z of the tube.

In addition, the end of the rib 223 is away from the inner wall 23 . Therefore, the tube insertion plate member 22 has two flat surfaces 224 outside the tube hole 221 , the insertion hole 222 and the rib 223 in the main direction Z of the tube. The flat surface 224 extends all over the tube insertion plate member 22 in the stacking direction Y of the tubes. The flat surface 224 is a deformable part that is easily deformed in the longitudinal direction X of the pipe. Therefore, when the temperature difference between the tubes 10 is large, the core plate 20 is deformed in the longitudinal direction X of the tube due to the deformation of the flat surface 224, and the thermal strain of the tube 10 is absorbed by the deformation of the core plate 20, thereby lowering the tube 10. Stress in the main direction Z of the tube.

As described above, the burr part 221 a is provided at the inner peripheral edge of the tube hole 221 , thereby increasing the rigidity of the surrounding area of the tube hole 221 in the tube insertion plate part 22 . Therefore, when the temperature of one tube 10 is different from that of the adjacent tube 10, the burr part 221a limits the deformation of the end of the tube hole 221, thereby limiting the stress at the end of the tube hole 221 in the main direction Z of the tube. concentrated.

In addition, the burr part 221a is provided only at the tube hole 221 and does not need to be provided at the insertion hole 222, thereby improving the formability of the core plate 20. In addition, the thickness of the insert 4 is thicker than that of the pipe 10, so that the insert 4 is hardly damaged by stress concentration. Thus, stress concentrations at the ends of the tube 10 in the main direction Z of the tube are limited. As a result, deformation of the ends of the tube holes 221 in the main direction Z of the tube is restricted, while the formability of the core plate 20 is improved.

(sixth embodiment)

The burr member 221 a in FIGS. 9B and 10 is provided at the entire circumference of the inner peripheral edge of the tube hole 221 . Alternatively, the burr member 221 a may be partially disposed on the inner peripheral edge of the tube hole 221 . For example, as shown in FIGS. 11 and 12 , the cutout portion 221b may be provided at an inner peripheral edge portion corresponding to the arc portion 10b of the tube 10 .

When the burr member 221a is formed by press working, cracks may be generated in the burr member 221a. However, when the trimmed portion 221b is provided by cutting a part of the burr member 221a in advance, it becomes difficult for the burr member 221a to be cracked, and the formability of the core plate 20 is improved.

In addition, cracks in the press working of the burr member 221a are generated particularly in the portion corresponding to the arcuate portion 10b of the pipe 10. As shown in FIG. Therefore, when the cutout portion 221b is previously provided at the portion of the burr member 221a corresponding to the arc portion 10b, cracking of the burr member 221a is restricted and the formability of the core plate 20 is more improved. Furthermore, even when a part of the burr member 221a corresponding to the arc portion 10b is cut, the burr member 221a can limit stress concentration at the end of the tube 10 in the main direction Z of the tube. Thus, stress concentrations at the ends of the tube 10 are limited in the main direction Z of the tube, while improving the formability of the core plate 20 .

(seventh embodiment)

13 is a cross-sectional view of a core plate 20 for a heat exchanger according to a seventh embodiment of the present invention, taken along a line in the main direction Z of the tubes. The cutout portion 221b is inclined toward the flat surface 224, ie, toward the surface of the core plate 20 that is nearly perpendicular to the longitudinal direction X of the tube. Specifically, the cutout portion 221b is inclined in such a manner that the inner end of the cutout portion 221b near the central portion of the tube hole 221 is disposed inside each of the containers 2 and 3 compared to the outer end of the cutout portion 221b.

When the temperature of one pipe 10 is different from that of the adjacent pipe 10 and thermal strain is generated in the pipe 10, the connection point (bending point) D between the flat surface 224 and the cut portion 221b is deformed for absorbing the thermal strain. Thus, stress concentrations at the ends of the pipe 10 in the main direction Z of the pipe can be limited.

When the cutting portion 221b protrudes to the surface of the core plate 20 nearly perpendicular to the tube longitudinal X, the ratio of the length L3 of the protruding cutting portion 221b to the length L2 of the tube hole 221 is set approximately at 0.05≤(L3 /L2)≤0.3. The stress concentrations at the ends of the tube 10 in the main direction of the tube are thereby limited, while the formability of the core plate 20 is improved.

When the ratio (L3/L2) is less than 0.05, the connection point D between the flat surface 224 and the cut portion 221b is difficult to form. In addition, when thermal strain is generated in the pipe 10, the connection point D is hardly deformed, and may not absorb the thermal strain. On the contrary, when the ratio (L3/L2) is larger than 0.3, the distance between the end of the pipe 10 in the main direction Z of the pipe and the connection point D becomes long, so that the connection point D may not absorb the thermal strain in the pipe 10 .

(eighth embodiment)

The cutout portion 221b in FIGS. 11-13 is provided at a portion of the burr member 221a corresponding to the arcuate portion 10b of the tube 10 . Alternatively, each burr member 221a may be provided with a cutout portion 221b at a portion corresponding to the straight portion 10a of the tube 10 . In this case, each cutout portion 221b is provided at approximately the same portion of each burr member 221a. The generation of cracks in the burr member 221 a during the press working is thereby restricted, while improving the formability of the core plate 20 .

(ninth embodiment)

In the core plate 20 shown in FIGS. 9A-14 , a burr member 221 a is provided at each tube hole 221 . Alternatively, the burr members 221a may be provided only in a part of the tube holes 221 near both ends of the core plate 20 in the stacking direction Y of the tubes. For example, as shown in FIG. 15, the burr member 221a may be provided only in the first to third tube holes 221 counted from both ends of the core plate 20 in the stacking direction Y of the tubes. In this case, the rib 223 may be provided at an intermediate portion between the first to third tube holes 221 and between the insertion hole 222 and the first tube hole 221 .

In general, thermal strain due to the temperature difference of the tubes 10 may be generated in a part of the tubes 10 disposed at both end sides in the stacking direction Y of the tubes. Therefore, when the burr members 221a and the ribs 223 are only partially provided near both ends of the core plate 20 in the stacking direction Y of the tubes, stress concentration at the ends of the tubes 10 is effectively restricted.

In addition, the burr part 221 a and the rib 223 may not need to be provided in the middle portion of the core plate 20 in the stacking direction Y of the tubes, thereby improving the formability of the core plate 20 .

When the number of tubes 10 is not less than thirty, "near both ends of the core plate 20" is set to a range in which three to five tube holes 221 are provided from both ends of the core plate 20 in the stacking direction Y of the tubes. The number of tube holes 221 where the burr members 221a are provided can be appropriately set according to the state of the core plate 20 (for example, the length of the core plate 20, the total number of tube holes 221, the size of the tube holes 221).

(tenth embodiment)

A core plate 20 for a heat exchanger according to a tenth embodiment of the present invention will be described with reference to FIGS. 16-18 . The tube hole 221 has a first and a second end in the main direction Z of the tube. The rib 223 may be provided in the tube insertion plate member 22 so as to protrude to the outside by a predetermined length in the main direction Z of the tube (protrusion length ) L4, and provide a flat surface 224. The flat surface 224 is located outside the rib 223 in the tube insertion plate part 22 in the main direction Z of the tube.

18 is a graph showing the relationship between the protruding length L4 of the rib 223 and the stress ratio at the end of the pipe 10 in the main direction Z of the pipe compared to the case without any rib 223 . When the protrusion length L4 is set approximately in the range of 4 to 8 mm, the stress ratio decreases. Furthermore, thermal strains in the tube 10 can be absorbed by deformation of the flat surface 224 located outside the rib 223 in the main direction Z of the tube.

In the core plate 20 shown in FIG. 16 , each intermediate portion between the tube holes 221 and the insertion holes 222 in the stacking direction Y of the tubes is provided with a rib 223 on the main body of the tubes. The direction Z has a length L1 longer than the length L2 of the tube hole 221 . Alternatively, each intermediate portion may have a pair of ribs 223 each having a length shorter than the length L2 of the tube hole 221, similarly to the case of the first to third embodiments L1. Also in this case, when the protruding length L4 between each outer end portion of the rib-shaped portion 223 in the stacking direction Y of the tubes and the adjacent end portion of the tube hole 221 is set approximately in the range of 4 to 8 mm When inside, the stress concentration at the end of the pipe 10 in the main direction of the pipe is limited.

The protruding length L4 can be appropriately set according to the state of the core plate 20 (eg, the length of the core plate 20 and the size of the tube hole 221 ).

(other embodiments)

While the present invention has been fully described with reference to the preferred embodiments thereof with reference to the accompanying drawings, it is to be mentioned that various changes and modifications will become apparent to those skilled in the art.

For example, according to the second to fourth embodiments and the tenth embodiment, the burr part 221 a may be provided in the core plate 20 . Alternatively, according to the fifth to ninth embodiments, the rib 223 may not be provided in the core plate 20 . Alternatively, a burr member 221a may be provided at an inner peripheral edge of the insertion hole 221a.

In the core plate 20 according to the seventh embodiment, the inner end of the cutout portion 221b, which is closer to the center portion of the tube hole 221, is provided in each container 2 and the outer end of the cutout portion 221b. 3 way interior tilt. Alternatively, the cutout portion 221b may be inclined in such a manner that the inner end of the cutout portion 221b is positioned outside each of the containers 2 and 3 compared to the outer end of the cutout portion 221b. In this case, the burr part 221 a protrudes to the outside of each of the containers 2 and 3 , and the rib 223 has a convex shape protruding from the tube insertion plate part 22 to the inside of each of the containers 2 and 3 .

In the core panel 20 according to the eighth embodiment, each burr member 221a has a cutout portion 221b. Alternatively, each burr member 221a may have a plurality of cutout portions 221b.

In the core plate 20 according to the ninth embodiment, the cutout portion 221b is not provided at the burr part 221a. Alternatively, the burr member 221a may have a cutout portion 221b. In addition, a burr part 221 a may be provided at an inner peripheral edge of the insertion hole 222 . When the cutout portion 221b is provided at a portion of the tube hole 221 corresponding to the arc portion 10b of the tube 10 , the cutout portion 221b may be inclined toward the flat surface 224 .

The ribs 223 and the burrs 221a can be effective not only for thermal strains but also for strains of the pipe 10 due to changes in the internal pressure or vibration of the vehicle, and can limit the movement of the pipe 10 in the main direction Z of the pipe. Stress concentration at both ends of the .

In addition, the core plate 20 may be used for a heat exchanger for other devices besides a heat sink.

Such changes and modifications are to be understood as being within the scope of the present invention as defined in the appended claims.

Claims (20)

1. heat exchanger comprises:

A plurality of pipes (10), each in the described pipe all have even shape, pile up in first direction (X) extension and in second direction (Y); And

Container (2,3), described container have pipe and insert plate member (22), and are arranged on the place, end of a plurality of pipes (10) at first direction (X), to be communicated with, wherein with a plurality of pipes (10):

Pipe inserts plate member (22) and has a plurality of pores (221) and a plurality of rib shape portions (223) that insert a plurality of pipes (10), and each in the described a plurality of rib shape portion all approaching third direction (Z) extension of vertical first direction (X) and second direction (Y);

Each length at third direction (Z) (L1) in a plurality of rib shape portions (223) is all short than each length at third direction (Z) (L2) in a plurality of pores (221);

Pore (221) has first and second bore ends at third direction (Z);

Rib shape portion (223) is arranged on pipe and inserts in the plate member (22), and is overlapping with in second direction (Y) and first and second bore ends at least one, and is provided at the deformable deformable component of first direction (X) (224); And

Deformable component (224) goes up at pipe at third direction (Z) and inserts the outside that is positioned at rib shape portion (223) in the plate member (22).

2. heat exchanger comprises:

A plurality of pipes (10), each in the described pipe all have even shape (224), pile up in first direction (X) extension and in second direction (Y); And

Container (2,3), described container have pipe and insert plate member (22), and are arranged on the place, end of a plurality of pipes (10) at first direction (X), to be communicated with, wherein with a plurality of pipes (10):

Pipe inserts plate member (22) and has a plurality of pores (221) and a plurality of rib shape portions (223) that insert a plurality of pipes (10), and each in the described a plurality of rib shape portion all approaching third direction (Z) extension of vertical first direction (X) and second direction (Y);

Each pore (221) all has first and second bore ends at third direction (Z);

Compare with at least one bore ends in described first and second bore ends, rib shape portion (223) is arranged on pipe and inserts in the plate member (22), protruding into outside predetermined length (L4) at third direction (Z), and be provided at the deformable deformable component of first direction (X) (224);

Deformable component (224) goes up at pipe at third direction (Z) and inserts the outside that is positioned at rib shape portion (223) in the plate member (22); And

Predetermined length (L4) is set at 4 in the scope of 8mm.

3. heat exchanger according to claim 1, wherein:

Rib shape portion (223) is arranged in the mid portion between all adjacent pores (221).

4. heat exchanger according to claim 1 and 2, wherein:

Rib shape portion (223) is arranged in a part of mid portion between all adjacent pores (221).

5. heat exchanger according to claim 4, wherein:

Described mid portion comprises first mid portion and second mid portion, and wherein said first mid portion is provided with rib shape portion (223), and described second mid portion does not have rib shape portion (223).

6. heat exchanger according to claim 5, wherein:

Described first mid portion and described second mid portion are gone up alternately in second direction (Y) and are provided with.

7. heat exchanger according to claim 5, wherein:

In in described first mid portion one and described second mid portion two go up alternately in second direction (Y) and are provided with.

8. heat exchanger according to claim 1 and 2, wherein:

Rib shape portion (223) is arranged in the mid portion between the adjacent pore (221);

Described mid portion comprises first mid portion and second mid portion, wherein said first mid portion only is provided with rib shape portion (223) in described first bore ends, one side, and described second mid portion only is provided with rib shape portion (223) in described second bore ends, one side; And

Described first mid portion and described second mid portion are gone up alternately in second direction (Y) and are provided with.

9. heat exchanger comprises:

A plurality of pipes (10), each in the described pipe all have even shape, pile up in first direction (X) extension and in second direction (Y); And

Container (2,3), described container have pipe and insert plate member (22), and are arranged on the place, end of a plurality of pipes (10) at first direction (X), to be communicated with, wherein with a plurality of pipes (10):

Described pipe inserts plate member (22) and has a plurality of pores (221) and a plurality of rib shape portions (223) that insert a plurality of pipes (10), and described a plurality of rib shape portion is arranged on the outside of the end of pore (221) at the third direction (Z) that approaches vertical first direction (X) and second direction (Y).

10. heat exchanger according to claim 9, wherein:

Rib shape portion (223) and pore (221) third direction (Z) aim at and its between have distance.

11. a heat exchanger comprises:

Core component (1), described core component comprise a plurality of pipes (10), and each in the described pipe all has even shape, piles up (Y) in first direction (X) extension and in second direction; And

Container (2,3), described container is arranged on the place, end of a plurality of pipes (10) at first direction (X), and have the central layer (20) that is connected on a plurality of pipes (10) and be set to and central layer (20) forms the vessel (21) of vessel space (2a), wherein:

Central layer (20) has pipe and inserts plate member (22), and described pipe inserts plate member and has a plurality of pores (221) and a plurality of burr parts (221a), and described a plurality of burr parts are positioned at the inner peripheral edge place of at least a portion of pore (221);

Pipe (10) is inserted in respectively in the pore (221), to be communicated with vessel space (2a);

Burr parts (221a) protrude at first direction (X); And

What described inner peripheral edge had the part that cuts and remove burr parts (221a) cuts part (221b).

12. heat exchanger according to claim 11, wherein:

Each pipe (10) is all comprising a pair of relative straight portion (10a) and a pair of relative arch section (10b) near in the cross section perpendicular to first direction (X);

Described a pair of relative straight portion (10a) is set near parallel;

Described a pair of relative arch section (10b) is set to connect the end of described a pair of relative straight portion (10a); And

Cut part (221b) and be positioned at least a portion place with the corresponding pore of arch section (10b) (221) of pipe (10).

13. heat exchanger according to claim 12, wherein:

Cut part (221b) near surface tilt perpendicular to the central layer (20) of first direction (X).

14. heat exchanger according to claim 13, wherein:

Pore (221) has length L 2 near the third direction (Z) perpendicular to first direction (X) and second direction (Y);

Cut part (221b) and when on the surface of central layer (20), protruding, have the length L 3 of protrusion; And

The protrusion length L 3 that cuts part (221b) is set in 0.05≤(L3/L2)≤0.3 scope with the ratio of the length L 2 of pore (221).

15. heat exchanger according to claim 11, wherein:

Each pipe (10) is all comprising a pair of relative straight portion (10a) and a pair of relative arch section (10b) near in the cross section perpendicular to first direction (X);

Described a pair of relative straight portion (10a) is set near parallel;

Described a pair of relative arch section (10b) is set to connect the end of described a pair of relative straight portion (10a); And

Cut part (221b) and be positioned at least a portion place with the corresponding pore of straight portion (10a) (221) of pipe (10).

16. according to each described heat exchanger in the claim 11 to 15, wherein:

Burr parts (221a) and cut part (221b) and only be arranged on the part place of pore (221), described part is near second direction (Y) is arranged on the two ends of central layer (20).

17. a heat exchanger comprises:

Core component (1), described core component comprise a plurality of pipes (10), and each in the described pipe all has even shape, piles up in first direction (X) extension and in second direction (Y);

Container (2,3), described container is arranged on the end place of a plurality of pipes (10) at first direction (X), and has the central layer (20) that is connected to a plurality of pipes (10) and be set to vessel (21) with central layer (20) formation vessel space (2a); And

Insert (4), described insert are arranged on the place, end near the core component (1) that is parallel to first direction (X), and wherein the end of insert (4) is connected to central layer (20) with strengthening core body component (1), wherein:

Central layer (20) has pipe and inserts plate member (22), and described pipe inserts plate member and has a plurality of pores (221), patchhole (222) and a plurality of burr parts (221a);

Pipe (10) is inserted in respectively in the pore (221), to be communicated with vessel space (2a);

Insert (4) inserts patchhole (222) to be connected to central layer (20); And

Burr parts (221a) protrude at first direction (X), and only are arranged on the inner peripheral edge place of pore (221).

18. heat exchanger according to claim 17, wherein:

Burr parts (221a) only are arranged on the part place of pore (221), and described part only is arranged near the two ends of the central layer (20) on the second direction (Y).

19. according to claim 11 or 17 described heat exchangers, wherein:

Pipe inserts plate member (22) and has a plurality of rib shape portions (223), and described a plurality of rib shape portion is near third direction (Z) extension perpendicular to first direction (X) and second direction (Y).

20. heat exchanger according to claim 19, wherein:

Described rib shape portion (223) is near second direction (Y) is arranged on the two ends of central layer (20).

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