JP2002243387A - Heat exchanger and its manufacturing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heat exchanger capable of lightening by improving assembly work of a tube and a tank and assuring a safety. SOLUTION: The heat exchanger 1 comprises a core 5 having tubes 2 and fins 3, a side plate 8, and a tank 3 having an end plate 30 and a tank plate 31. In the exchanger 1, the respective members are assembled. The end plate has tube inserting holes 32 and connecting holes 38 for connecting the side plate. An interval T1 between the inserting hole and the connecting hole is the same as an interval T2 between the adjacent inserting holes. The inserting hole and the connecting hole have the same shapes. The inserting hole and the connecting hole have a guide including a protrusion 32a and a tapered part 32b.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a heat exchanger used in a heat exchange cycle mounted on a vehicle or the like.

[0002]

2. Description of the Related Art Generally, for example, a radiator, a condenser, an evaporator and the like are known as a heat exchanger constituting a heat exchange cycle mounted on a vehicle or the like.

[0003] For example, a condenser includes a core including a plurality of tubes through which a medium flows and fins mounted on the tubes, a side plate for reinforcing both sides of the core, and a tank for connecting the tubes and the side plates. The above members are assembled and brazed with a brazing material covering a tube or a tank. ,
Each heat exchanger, the pressure of the medium flowing inside, rainwater,
Considering external influences such as exhaust gas and flying stones,
It is desired to achieve the lightest possible weight while ensuring the functionality.

[0004]

In response to the demand for reducing the weight of the heat exchanger, in recent years, the thickness of members constituting the heat exchanger has sometimes been reduced. Further, in order to achieve weight reduction, for example, in a condenser, it is conceivable to reduce the volume of a tank for distributing a medium to each tube.

[0005] The heat exchanger is a precision instrument in which each member is precisely assembled. For this reason, a member connected to the tank,
For example, it is often difficult to form a hole having a different shape for each tube or side plate in order to maintain the precision of the shape. For example, if a tube insertion hole for connecting a tube is formed, and then a connection hole for connecting side plates having different hole shapes is formed, the tube insertion hole already formed is formed by a tensile force applied when the connection hole is formed. Are deformed, making it difficult to maintain precision.

When the height of the tube is reduced to improve the heat radiation performance, the shape of the tube insertion hole also becomes small,
A problem arises in that the tube and the tank are difficult to assemble.

Further, when a tube formed by roll-forming using a thin material is used, the brazing material applied to the tank easily flows to the tube side through the tube insertion hole, which is compared with a case where a tube formed by the conventional extrusion molding is used. And
Higher precision is required for the shape of the tube insertion hole.

When a high-temperature and high-pressure medium flows through the heat exchanger, a load is particularly likely to be applied to the connection between the tank and the tube, and an excessive amount of the brazing material flows out and diffuses in this portion to cause erosion. If so, there is a problem that the heat exchanger is destroyed therefrom.

[0009] Even if the thickness of each material constituting the heat exchanger is reduced to reduce the weight of the heat exchanger, the safety of the formed heat exchanger must be ensured.

Accordingly, the present invention has been made in view of the above problems,
An object of the present invention is to provide a heat exchanger capable of reducing the weight while improving the assemblability of the tube and the tank and ensuring the safety of the heat exchanger.

[0011]

According to the first aspect of the present invention, a core comprising a plurality of tubes through which a medium flows and fins mounted on the tubes, a side plate for reinforcing both sides of the core, and A heat exchanger comprising a tank for connecting the tube and the side plate, wherein the tank is provided with a tube insertion hole for connecting the tube and a connection hole for connecting the side plate; The space between the insertion hole and the connection hole was the same as the space between the adjacent tube insertion holes.

As described above, when the space between the tube insertion holes and the connection holes formed in the tank is made equal to the space between the adjacent tube insertion holes, the tube insertion holes and the connection holes can be formed substantially simultaneously. Further, even when the tube insertion hole and the connection hole are not formed substantially at the same time, if the space between the tube insertion hole and the connection hole and the space between the adjacent tube insertion holes are the same, the same piercing member and the holding member are used. The tube insertion hole or the connection hole can be formed while holding the plate constituting the tank by using, and by a tensile force generated at the time of forming the tube insertion hole or the connection hole of a different shape,
The deformation of the tube insertion hole or the connection hole can be prevented, and the precision of the tube insertion hole or the connection hole can be ensured.

According to a second aspect of the present invention, in the first aspect, the tube insertion hole and the connection hole have the same shape.

When the tube insertion hole and the connection hole have the same shape, the tube insertion hole and the connection hole can be formed substantially simultaneously, which facilitates the formation. Also,
When the tube insertion hole and the connection hole have the same shape, the tube insertion hole or the connection hole can be formed by the same piercing member and the holding member, so that deformation during the formation is prevented, and the tube insertion hole is prevented. Also, the precision of the connection hole can be ensured.

According to a third aspect of the present invention, in the first aspect of the present invention, the tube is a heat exchanger having a concave groove on an outer surface of the tube in contact with the tube insertion hole. is there.

As described above, when the tube has the groove, the molten brazing material is easily drawn into the groove in the heating furnace. The heat exchanger of the present invention,
Since the precision of the tube insertion hole is ensured, even if the brazing material applied to the tank flows through the concave groove and flows out to the tube side, a predetermined clearance is provided between the tube insertion hole and the tube. It is possible to provide a heat exchanger in which the tank and the tube are connected with a suitable amount of brazing material.

According to a fourth aspect of the present invention, there is provided a heat exchanger using a tube formed by forming a plate according to any one of the first to third aspects.

If a plate is formed into a tube, the tube can be formed using a thin plate, and the tube can be reduced in size. Therefore, a higher precision is required for the tube insertion hole. In the present invention, since the precision of the tube insertion hole and the connectivity is ensured, for example, it is possible to configure the heat exchanger using a tube formed by rolling a plate.

According to a fifth aspect of the present invention, in the invention according to any one of the first to fourth aspects, the tube insertion hole or the connection hole is a guide for guiding insertion of a tube or a side plate into a tank. Part is provided.

As described above, since the tube insertion hole or the connection hole is provided with the guide portion, the assemblability of the tube or the side plate is improved.

According to a sixth aspect of the present invention, in the invention according to any one of the first to fifth aspects, the guide portion includes a protruding portion protruding inside the tank and a tank connected to the protruding portion. The tapered portion is inclined inward.

As described above, the guide portion improves the assemblability by improving the insertability of the tube or the side plate into the tank by the tapered portion, and the tube or the side plate inserted into the tank by the protrusion. To improve bonding strength.

According to a seventh aspect of the present invention, in the first aspect of the present invention, the tank is formed by assembling an end plate provided with the tube insertion hole and a semi-cylindrical tank plate. The end plate includes a rounded portion having a gradually decreasing curvature from the center in the width direction of the end plate toward both ends, and the tube insertion hole and the connection hole are formed at the center in the width direction of the end plate. Are provided in a line in the region including the longitudinal direction.

The tube insertion hole and the connection hole are formed in a region including a portion having a larger curvature than both ends in the width direction of the end plate. As described above, when the tube insertion hole and the connection hole are formed in a region having a large curvature and substantially near a plane, and the guide portion is formed in the tube insertion hole and the connection hole, the tank of the tube or the side plate is formed. The insertability into the tank and the joining strength between the tube or the side plate and the tank are improved.

When an end plate having a large curvature is used, the amount of tubes to be inserted into the end plate can be reduced as compared with the case where an end plate having a small curvature is used. Can be reduced.

According to an eighth aspect of the present invention, in the seventh aspect of the invention, the end plate is provided with a brazing material layer on the inner surface side of the tank.

As described above, since the end plate is provided with the brazing material layer on the inner surface side of the tank, an excessive amount of the brazing material does not flow out and diffuse to the tube. To prevent erosion.

Further, the brazing material melted during brazing is
Since the fins do not flow out and diffuse to a large amount, the fins can be provided close to the end plate, and the heat transfer area can be increased to improve the heat exchange capacity.

According to a ninth aspect of the present invention, in the method for manufacturing a heat exchanger, a core comprising a plurality of tubes and fins mounted on the tubes and a tank connecting the tubes is assembled. The tube insertion hole formed in the holding member holds the plate constituting the tank in the holding member, is formed using a perforated member,
The perforating member includes a projection that penetrates a plate that forms a tank, and a step that follows the projection. The holding member includes a plate holding unit, a projection insertion unit into which the projection is inserted, and the plate. A taper holding portion following the protrusion insertion portion from the holding surface, wherein the piercing member forms a protrusion that projects the inside of the tank by abutting the protrusion against the plate, and holds the plate with the taper holding portion. And a step of pressing the step portion against a plate to form a tapered portion in the tank and forming the tube insertion hole provided with the guide portion including the projecting portion and the tapered portion.

As described above, the plate constituting the tank is held by the holding member having the plate holding surface, the tapered holding portion, and the projection insertion portion, and the tube insertion hole is formed by using the perforated member having the projection and the step portion. Therefore, the guide portion having the tapered portion and the protruding portion can be easily formed.

[0031]

FIG. 1 is a plan view showing a schematic configuration of a heat exchanger 1. FIG. The heat exchanger 1 shown in FIG. 1 shows an example of a condenser of a refrigeration cycle mounted on an automobile. As shown in FIG. 1, the heat exchanger 1 includes a core 5 formed by alternately stacking a plurality of tubes 2 and a plurality of fins 4 through which a medium flows, and a pair of tanks 3 to which ends of the tubes 2 are connected. And heat exchange of the medium is performed by the heat transmitted to the core 5. The tank 3 is provided with a joint pipe 6 for feeding or discharging the medium. The medium circulating in the heat exchange cycle flows into the tank 3 from one of the joint pipes 6, flows through the tube 2 while being exchanged, and is discharged from the other joint pipe 6 to the outside of the heat exchanger 1. Inside the tank 3, there is provided a partition plate 7 for closing the upper and lower openings of the tank 3 and changing the flow direction of the tube 2 and the medium flowing inside the tank 3.

On both upper and lower sides of the core 5, side plates 8 as reinforcing members are provided. A support member 9 used to mount the heat exchanger 1 on an automobile is provided at a predetermined portion of the side plate 8 disposed below the core 5.

The heat exchanger 1 is assembled with the above members, and is integrally brazed and joined in a heating furnace by the brazing material provided on the respective members. Note that flux is applied to each of the members before brazing, so that good brazing is possible.

FIG. 2 is a perspective view showing the tank 3 of this embodiment.

As shown in FIG. 2, the tank 3 of this embodiment is formed by assembling two members, an end plate 30 and a tank plate 31.

FIG. 3 is a front view of the tank 3. As shown in FIG. 3, the end plate 30 has a connection hole 38 for connecting the side plate 8 and a tube insertion hole 32 for connecting the tube.

As shown in FIGS. 2 and 3, the end plate 30 is provided with a rounded portion 30a whose curvature gradually decreases from the center in the width direction toward both ends, and the tube insertion hole 32 and the connection hole 38 are connected to the end. The plate 30 is provided in a line in the region including the center in the width direction over the longitudinal direction. In addition, the AA line in the figure is a virtual line indicating the center of the end plate 30 in the width direction.

As shown in FIGS. 2 and 3, the tube insertion hole 32 and the connection hole 38 are formed in the same shape.
The tube insertion hole 32 and the connection hole 38 are formed such that the interval T1 between the connection hole 38 and the tube insertion hole 32 and the interval T2 between the adjacent tube insertion holes 32 are the same.

As described above, when the tube insertion holes 32 and the connection holes 38 are formed at the same intervals T1 and T2, the tube insertion holes 32 and the connection holes 38 can be formed substantially simultaneously, which facilitates the formation. . In addition, tube insertion hole 3
Even if the holes 2 and the connection holes 38 are not formed substantially at the same time, if the respective intervals T1 and T2 are the same, the end plate 30 is firmly held by the same piercing member and the tube insertion holes 32 or the connection holes A hole 38 can be formed. Therefore, deformation of the end plate 30 at the time of forming the tube insertion hole 32 or the connection hole 38 is prevented, the precision of the shape of the tube insertion hole 32 and the connection hole 38 is maintained, and the tank 3 of the tube 2 and the side plate 8 is formed.
It is easy to assemble into the device.

The tube insertion hole 32 and the connection hole 38
Can be formed using the same mold such as the piercing member 50 and the holding member 60, and the cost for forming the mold can be reduced.

FIGS. 4A to 4D show tube insertion holes 3.
FIG. 4 is a process diagram showing a method for forming a second or connection hole 38.

As shown in FIG. 4, the end plate 30
Are held by the holding member 60, and the tube insertion hole 32 or the connection hole 38 is formed using the piercing member 50. The piercing member 50 used for forming the holes includes a projection 51 that penetrates the end plate 30 and a step 52 that follows the projection. The holding member 60 includes a plate holding surface 61 for holding the end plate 30, a projection insertion portion 62 into which the projection 51 of the piercing member 50 is inserted, and a taper holding portion 63 extending from the plate holding surface 61 to the projection insertion portion 62. It has.

First, the projecting portion 51 of the punching member 50 abuts against the end plate 30 held on the plate holding surface 61 of the holding member 60 (see FIG. 4A) (see FIG. 4B). )), The protrusion 51 penetrates through the end plate 30 and is inserted into the protrusion insertion portion 62 of the holding member 60 to form the tube insertion hole 32 or the connection hole 38, and the protrusion protrudes inside the tank 3. 32a, 3
8a is formed.

While holding the end plate 30 with the taper holding portion 63, the step portion 52 is pressed against the end plate 30, so that the tapered portions 32b, 38b inclined toward the inside of the tank 3 following the protruding portions 32a, 38a. Is formed (see FIG. 4C).

Therefore, the tube insertion hole 32 or the connection hole 38 formed in the end plate 30 is
Alternatively, a guide portion configured to include the protruding portions 32a and 38a and the tapered portions 32b and 38b for guiding the insertion of the side plate 8 into the tank 3 is provided (see FIG. 4D).

As described above, the guide portion provided in the tube insertion hole 32 or the connection hole 38 is provided with the tapered portions 32b and 38.
b, the insertability of the tube 2 or the side plate 8 is improved to improve the assembling property, and the protrusions 32a, 38a insert the tube 2 or the side plate 8
To improve bonding strength.

In FIG. 4, L1 is the end plate 3
No. 0 is a brazing material provided on the inner surface of the tank 3. When the brazing material L1 is provided on the side that becomes the inner surface of the tank 3, the brazing material does not exist in the tube insertion holes 32 and the connection holes 38 that come into contact with the tubes 2 or the side plates 8. For example, when the tube 2 is inserted into the tube insertion hole 32, the molten brazing material L1 is inserted into a gap formed by the contact between the tube insertion hole 32 and the tube 2.
Is positively retracted and connected to the tube 2 and the tank 3. As described above, if there is no brazing material on the contact surface between the tube insertion hole 32 and the tube 2, the gap formed between the tube insertion hole 32 and the tube 2 is joined with an appropriate amount of brazing material, and an excessive amount of brazing material is removed. Erosion due to diffusion and outflow hardly occurs. Therefore, the brazing property between the tube 2 and the side plate 8 and the tank is improved.

Since the brazing material does not intervene in the contact surface between the tube insertion hole 32 and the tube 2, the width t of the diameter of the tube insertion hole does not change during brazing, and the clearance between the end plate 8 and the tube 2 is secured. (See FIG. 4D).

FIG. 5 is a sectional view showing the tank 3 to which the tube 2 is connected.

As shown in FIG. 5, the end plate 30 constituting the tank 3 is provided with a brazing material L1 on the side to be the inner surface of the tank 3, and the tank plate 31 is provided with the brazing material on the side to be the inner surface of the tank 3. L2 is provided, and a brazing material L3 is provided on the side to be the outer surface.

The brazing material L 1 connects the tube 2 and the partition plate 7 provided inside the tank 3. On the other hand, the brazing material L2 joins the end plate 30 and the tank plate 31 to form the tank 3, and
The partition plate 7 is joined. The brazing material L3 is a brazing material for joining accessories such as the joint pipe 6 to the tank 3.

The end plate 30, the tank plate 31,
When the members constituting the heat exchanger 1 such as the partition plate 7 and the tube 2 are assembled and brazing in a furnace is performed, the brazing materials L1, L2, and L3 are melted, and the brazing materials are inserted into gaps between the members. The heat exchanger 1 is constructed by intruding and brazing the respective members integrally.

As described above, since the brazing filler metal L1 is provided on the side of the end plate 30 which is to be the inner surface of the tank 3, an appropriate amount of the brazing filler metal melted at the time of brazing is applied to the tube 2 of the tube insertion hole 32. Contact holes or connection holes 38
Since the gas flows out and diffuses into the gap where the gasket and the side plate 8 come into contact with each other and joins the tube 2 and the tank 3, erosion does not occur in the tube 2 even when the tube 2 is formed of a thin material. For example, the tube 2 formed by roll forming is formed of a very thin material having a thickness of about 0.25 mm in a plate constituting the tube 2, but since no holes or the like due to erosion are generated, safety is improved. Is sufficiently secured. When the tube 2 is formed by roll forming, a bead that partitions the medium flow path inside the tube may be provided. When the plate is bent to form a bead, the surface of the tube 2
The concave groove 2a is formed. When the tube 2 has a concave groove 2a on its surface, the end plate 30
Is drawn into this groove. When the clearance between the tube insertion hole 32 and the tube 2 is not ensured, if an excessive amount of brazing material is drawn into the concave groove 2a, there arises a problem that the brazing property between the tube insertion hole 32 and the tube 2 deteriorates.

In the tube insertion hole 2 of the present embodiment, the precision of the shape is secured and the clearance between the tube insertion hole 32 and the tube 2 is secured, so that the end plate 30 and the tube 2 are brazed with an appropriate amount of brazing material. Are joined together.

Even when the tube 2 formed by rolling a plate is used, the precision of the shape of the tube insertion hole 32 is ensured, and the clearance between the tube 32 and the tube 2 is maintained. It is possible to form the heat exchanger 1 with good brazing properties.

When the brazing material L1 is provided on the side of the end plate 30 which is to be the inner surface of the tank 3, an excessive amount of the brazing material does not flow out and diffuse to the fins 4, so that the fins formed of a material thinner than the tube 2 are used. 4 can be prevented from occurring.

Therefore, the fins 4 can be provided close to the tank 3, so that the mounting area of the fins 4 mounted on the tube 2 can be increased, and the heat exchange efficiency can be improved. For example, the heat exchanger 1 can be configured by bringing the ends of the fins 4 into contact with the tank 3.

FIG. 6 is an exploded perspective view showing a part of the heat exchanger shown in FIG.

As shown in FIG. 6, the tank plate 31 has a hole 37 for connecting the partition plate 7 and a joint pipe 6.
Are formed. The partition plate 7 has a projection 7 connected to the hole 37 of the tank plate 31.
a and a notch 7b for fitting the edge of the end plate 30
Is provided.

That is, the hole 37 of the tank plate 31
The projection 7a of the partition plate 7 is inserted into the notch 7b, and the edge of the end plate 30 is fitted into the notch 7b.

Therefore, the end plate 31 positioned by the partition plate is assembled inside the tank plate 32 to form the tubular tank 3.

The end plate 30 has a connection hole 38 provided with a guide portion and a tube insertion hole 32, and a core 5 composed of a tube 2 having a side plate 8 and fins 4 attached thereto, and brazed in a furnace. The heat exchanger 1 is joined.

[0063]

As described above, the present invention provides a core comprising a plurality of tubes through which a medium flows and fins mounted on the tubes, a side plate for reinforcing both sides of the core, the tubes and the side plates. In a heat exchanger including a tank for connecting a plate, and each of the members is assembled, the tank has a tube insertion hole for connecting the tube and a connection hole for connecting a side plate, and the tube insertion hole and the connection hole. Was set to be the same as the interval between the adjacent tube insertion holes.

As described above, when the interval between the tube insertion holes and the connection holes formed in the tank is made equal to the interval between the adjacent tube insertion holes, the tube insertion holes and the connection holes can be formed substantially simultaneously. Further, even when the tube insertion hole and the connection hole are not formed substantially at the same time, if the space between the tube insertion hole and the connection hole and the space between the adjacent tube insertion holes are the same, the same piercing member and the holding member are used. The tube insertion hole or the connection hole can be formed while holding the plate constituting the tank by using, and by the tensile force generated at the time of forming the tube insertion hole or the connection hole of different shape,
The deformation of the tube insertion hole or the connection hole can be prevented, and the precision of the tube insertion hole or the connection hole can be ensured.

The tube insertion hole and the connection hole have the same shape.

When the tube insertion hole and the connection hole have the same shape, the tube insertion hole and the connection hole can be formed substantially simultaneously, and the formation is facilitated. Also,
When the tube insertion hole and the connection hole have the same shape, the tube insertion hole or the connection hole can be formed by the same piercing member and the holding member, so that deformation during the formation is prevented, and the tube insertion hole is prevented. Also, the precision of the connection hole can be ensured.

The tube has a concave groove on the outer surface of the tube in contact with the tube insertion hole.

As described above, when the tube has the groove, the molten brazing material is easily drawn into the groove in the heating furnace. The heat exchanger of the present invention,
Since the precision of the tube insertion hole is ensured, even if the brazing material applied to the tank flows through the concave groove and flows out to the tube side, a predetermined clearance is provided between the tube insertion hole and the tube. It is possible to provide a heat exchanger in which the tank and the tube are connected with a suitable amount of brazing material.

The heat exchanger uses a tube formed by molding a plate.

When the plate is formed into a tube, the tube can be formed using a thin plate, and the tube can be reduced in size. Therefore, a higher precision is required for the tube insertion hole. According to the present invention, since the precision of the tube insertion hole and the connectivity is ensured, for example, the heat exchanger can be configured using a tube formed by rolling a plate.

Further, the tube insertion hole or the connection hole has a guide portion for guiding the insertion of the tube or the side plate into the tank.

As described above, since the tube insertion hole or the connection hole is provided with the guide portion, the tube or side plate can be easily assembled.

Further, the guide portion has a protruding portion protruding inside the tank, and a taper portion inclined to the inside of the tank continuously from the protruding portion.

As described above, the guide portion improves the assemblability by improving the insertability of the tube or the side plate into the tank by the tapered portion, and the tube or the side plate inserted into the tank by the protrusion. To improve bonding strength.

In some cases, the tank used in the heat exchanger is constructed by assembling an end plate provided with the tube insertion hole and the connection hole and a semi-cylindrical tank plate.

The end plate has a rounded portion having a curvature decreasing from the center in the width direction of the end plate toward both ends, and the tube insertion hole and the connection hole have a center in the width direction of the end plate. Are provided in a line in the region including the longitudinal direction.

As described above, the tube insertion hole and the connection hole are formed in a region having a large curvature and almost a plane.
When guide portions are formed in these tube insertion holes and connection holes, the tube or side plate can be easily inserted into the tank, and the joining strength between the tube or the side plate and the tank can be improved. In addition, when an end plate having a large curvature is used, the insertion amount of a tube inserted into the end plate can be reduced as compared with the case where an end plate having a small curvature is used, and the material cost of the tube is reduced. It becomes possible.

Further, the end plate is provided with a brazing material layer on the side to be the inner surface of the tank.

As described above, since the end plate is provided with the brazing material layer on the inner surface side of the tank, an excessive amount of the brazing material does not flow out and diffuse to the tube. To prevent erosion. In addition, since a large amount of the brazing material melted during brazing does not flow out and diffuse to the fins, the fins can be provided close to the end plate, thereby increasing the heat transfer area and improving the heat exchange capacity.

Further, the tube insertion hole is formed by holding a plate constituting a tank in a holding member and using a perforated member, wherein the perforated member is formed by a projecting portion which penetrates the plate constituting the tank. And a step portion following the projection portion, wherein the holding member includes a plate holding portion, a projection insertion portion into which the projection portion is inserted, and a taper holding portion following the projection insertion portion from the plate holding surface, The piercing member is
Forming a protruding portion that protrudes inside the tank by pressing the protruding portion against the plate, and pressing the step portion against the plate while holding the plate with the tapered holding portion,
A taper portion is formed in the tank, and the tube insertion hole provided with a guide portion including the protrusion and the taper portion is formed.

As described above, the plate constituting the tank is held by the holding member having the plate holding surface, the tapered holding portion, and the projection insertion portion, and the tube insertion hole is formed by using the punching member having the projection and the step portion. For forming, a guide portion having a tapered portion and a protruding portion is easily formed.

As described above, according to the present invention, it is possible to improve the assemblability of the tube and the tank constituting the heat exchanger, secure the safety, and provide a heat exchanger that is reduced in weight. .

[0083]

[Brief description of the drawings]

FIG. 1 is a plan view showing a schematic configuration of a heat exchanger according to a specific example of the present invention.

FIG. 2 is a perspective view showing a tank according to a specific example of the present invention.

FIG. 3 is a front view showing a tank according to a specific example of the present invention.

FIGS. 4A to 4D are process diagrams illustrating a process of forming a tube insertion hole or a connection hole according to a specific example of the present invention.

FIG. 5 is a cross-sectional view of a tank to which a tube is connected according to a specific example of the present invention.

6 is an exploded perspective view showing a part of the heat exchanger shown in FIG. 1 according to a specific example of the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 heat exchanger 2 tube 2 a concave groove 3 tank 4 fin 5 core 6 joint pipe 7 partition plate 7 a convex portion 7 b cutout portion 8 side plate 9 support member 30 end plate 30 a radius portion 31 tank plate 32 tube insertion hole 32 a protrusion 32b Taper part 36 Hole part 37 Hole part 38 Connection hole 38a Projection part 38b Taper part 50 Drilling member 51 Projection part 52 Step part 60 Holding member 61 Plate holding surface 62 Projection insertion part 63 Taper holding part L1 Brazing material L2 Brazing material L3 Brazing Material T1 interval T2 interval t Width of tube insertion hole diameter

Continuing on the front page (72) Inventor Manabu Yamashita 39, Higashihara, Chiyo, Odai-gun, Osato-gun, Saitama Prefecture Inside of Xexel Valeo Climate Control (72) Inventor Jun Akaike 39, Higashihara, Chiyo, Odai-gun, Onan-gun, Saitama 39 F-term (reference) in the company Xexel Valeo Climate Control 3L065 BA09

Claims (9)

[Claims] 1. A core comprising a plurality of tubes through which a medium flows and fins mounted on the tubes, a side plate for reinforcing both sides of the core, and a tank connecting the tubes and the side plates. In a heat exchanger in which members are assembled, the tank is provided with a tube insertion hole for connecting the tubes and a connection hole for connecting a side plate, and a distance between the tube insertion holes and the connection holes is such that the adjacent tube insertion holes are provided. A heat exchanger characterized by having the same interval as that of the heat exchanger. 2. The tube insertion hole and the connection hole,
The heat exchanger according to claim 1, wherein the heat exchangers have the same shape. 3. The heat exchanger according to claim 1, wherein the tube has a concave groove on an outer surface of the tube in contact with the tube insertion hole. 4. The heat exchanger according to claim 1, wherein the heat exchanger uses a tube formed by molding a plate. 5. The tube insertion hole and the connection hole,
The heat exchanger according to any one of claims 1 to 4, further comprising a guide portion for guiding insertion of the tube or the side plate into the tank. 6. The apparatus according to claim 1, wherein the guide portion includes a protrusion protruding inside the tank, and a taper portion inclined to the inside of the tank continuously from the protrusion.
A heat exchanger according to any one of claims 1 to 5. 7. The tank includes an end plate provided with the tube insertion hole and a semi-cylindrical tank plate, wherein the end plate has a curvature from a center in a width direction of the end plate toward both ends. The tube according to any one of claims 1 to 6, further comprising a rounded portion, wherein the tube insertion hole and the connection hole are provided in a line including a center of the end plate in a longitudinal direction. Heat exchanger. 8. The heat exchanger according to claim 7, wherein the end plate is provided with a brazing material layer on a side to be an inner surface of the tank. 9. A method of manufacturing a heat exchanger, comprising: assembling a core including a plurality of tubes and fins mounted on the tubes, and a tank connecting the tubes, wherein a tube insertion hole formed in the tank is held. Holding a plate constituting the tank in the member, formed by using a perforated member, wherein the perforated member includes a projection that penetrates the plate that constitutes the tank, and a step that follows the projection, The holding member includes a plate holding portion, a projection insertion portion into which the projection portion is inserted, and a tapered holding portion continuing from the plate holding surface to the projection insertion portion, wherein the piercing member projects the projection portion into the plate. Pressing the step portion against the plate while holding the plate with the tapered holding portion to form a projecting portion projecting inside the tank Formed, the manufacturing method of the heat exchanger, characterized in that to form the tube insertion holes having a guide portion formed of the protruding portion and the tapered portion.