JP2998422B2 - Heat exchanger - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat exchanger used for an oil cooler for cooling engine oil using, for example, engine cooling water.

[0002]

BACKGROUND OF THE INVENTION The present inventor has disclosed Japanese Patent Application No. 3-128094 (filing date: May 31, 1991) and Japanese Patent Application No. 3-129.
No. 447 (filing date: May 31, 1991)
An oil cooler provided with a heat exchange unit 100 as shown in FIG. The heat exchange unit 100 includes a pair of molding plates 1.
By laminating a plurality of joined bodies 103 having the same shape with the fin plate 102 interposed therebetween, a plurality of flow pipes 105 through which the engine oil flows is formed. A plurality of cooling water passages 106 through which cooling water flows are formed between the adjacent joined bodies 103 and around the plurality of flow pipes 105.

[0003] An inner peripheral side bulging portion 107 bulging to one side is formed on the end surface on the inner peripheral edge side of the forming plate 101 by press working, and these bulging portions 107 are formed.
Are provided with a plurality of communication holes 108, respectively. In addition, four bulges 107 are sequentially formed on the outer circumference of the bulge 107 on the inner circumference up to the end face on the outer rim side of the forming plate 101. Each bulging portion 107 has a communication hole 108 formed therein. Then, each bulging portion 107
Communicate with each other in the stacking direction through the respective communication holes 108.

[0004]

However, in the above-described heat exchange section 100, the bulging section 10 is formed by pressing.
Since the number of the flow pipes 105 in the same volume is restricted due to the bent portion inevitably generated in the area 7, there is a problem that the heat radiation area is reduced. Further, since the portion of the bulging portion 107 serving as a brazing margin protrudes into the communication hole 108, the size of the communication hole 108 is narrowed, and the flow of the engine oil is hindered. Therefore, the flow rate of the engine oil decreases near the wall surface of the bulging portion 107,
There is a problem that the heat exchange efficiency between engine oil and cooling water is reduced. An object of the present invention is to provide a heat exchanger in which the number of flow pipes in the same volume is increased to increase the heat radiation area and improve the heat exchange efficiency.

[0005]

[Means for Solving the Problems]

[Claim 1] In the present invention, a plurality of first communication holes penetrate in a thickness direction, and are provided adjacent to the plurality of first communication holes via a plate wall portion, and are arranged in the same direction as the first communication holes. By laminating a plurality of flat plates through which the plurality of second communication holes penetrate so that the respective first communication holes and the respective second communication holes communicate with each other in the laminating direction, the plate is laminated by the laminated plate wall portions. A plurality of flow pipes are formed extending in the direction, through which the first heat medium flows, and a second heat medium that exchanges heat with the first heat medium through the flow pipes around these flow pipes Technical means in which a flow passage through which the air flows are formed. [Claim 21] In the present invention, one first communication hole penetrates the island-shaped portion connected to the inner peripheral side of the annular outer frame portion via the connecting piece in the thickness direction of the island-shaped portion. A pair of flat plates having two second communication holes penetrated in the same direction as the first communication holes so as to surround the island-shaped portion are defined by the first communication holes and the first communication holes. By laminating two communicating holes so as to communicate with each other in the laminating direction,
One channel pipe having a first heat medium passage extending in the stacking direction and having the first heat medium flowing therein is formed by the stacked island portions, and each connecting piece and each island portion are sewn. In addition, a technical means in which a first heat medium passage through which a second heat medium that exchanges heat with the first heat medium through the flow path pipe flows is formed.

[0006]

[Action]

[Claim 1] The present invention provides a plurality of first communication holes and a plurality of second communication holes.
By laminating a plurality of flat plates having communication holes adjacent to each other via a plate wall portion, a plurality of flow tubes through which the first heat medium flows are formed, and a second heat medium is provided around the flow tube. A flowing passage is formed. For this reason, since the bent portion is not formed in the flat plate, it becomes possible to form more flow pipes in the same volume, and the heat exchange area increases. In addition, since no structure is formed in the direction in which the flow path pipe extends that obstructs the flow of the first heat medium, the flow velocity near the wall surface of the first heat medium increases, so that the first heat medium and the second heat medium are Heat exchange efficiency is improved. [Claim 21] According to the present invention, one first communication hole and two second communication holes are laminated inside a pair of flat plate plates provided adjacently via a connecting piece and an island-shaped portion. One flow pipe having a first heat medium passage through which the first heat medium flows is formed, and a second heat medium passage through which the second heat medium flows so as to sew each connecting piece and each island-like portion is formed. It is formed. For this reason, since the structure which obstructs the flow of the first heat medium is not formed in the extension direction of the flow path tube, the flow velocity near the wall surface of the first heat medium is increased, so that the first heat medium and the second heat medium And the heat exchange efficiency is improved.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A heat exchanger according to the present invention will be described based on an embodiment shown in the drawings. 1 to 10 show a first embodiment of the present invention, and FIG. 1 shows an oil cooler. The oil cooler 1 is mounted between an engine 2 for traveling the vehicle and an oil filter 3. This oil cooler 1 is
A lower bracket 4 attached to the engine 2, an upper bracket 5 for attaching the oil filter 3, a cylindrical union 6 for returning engine oil from the oil filter 3 to the engine 2, a lower bracket 4 and an upper bracket 5 and a heat exchange unit 7 for cooling engine oil using engine cooling water.

[0008] The engine 2 has an oil filter 3 through which an engine oil for lubricating each sliding portion (not shown) is led through the oil cooler 1 to the oil filter 3.
And an introduction passage 2b for introducing the engine oil filtered by the oil filter 3 into the inside through the union 6. The oil filter 3 filters engine oil and has a conventionally known structure.

The lower end bracket 4 is made of a metal such as an aluminum alloy and is formed in an annular plate shape, and an O-ring 4 a for preventing leakage of engine oil between the bracket 2 and the engine 2.
Is installed. The lower end bracket 4 is formed with a plurality of inlet holes 4b that communicate the outlet path 2a of the engine 2 and the heat exchange unit 7. Also, the lower end bracket 4
Is connected to the lower end of the heat exchange unit 7 by means such as brazing.

The upper end bracket 5 is made of a metal such as an aluminum alloy and is formed in an annular plate shape.
A ring 5 a is mounted between the oil filter 3 and the upper end bracket 5. In this upper end side bracket 5,
A plurality of outlet holes 5b communicating the inside of the oil filter 3 and the inside of the heat exchange unit 7 are provided. Further, the end of the upper end bracket 5 on the side of the heat exchange section 7 is joined to the upper end of the heat exchange section 7 by means such as brazing. An inlet pipe 5d for guiding engine cooling water from a cooling water pipe (not shown) into the heat exchange section 7 through a cooling water passage 5c is connected to an outer peripheral wall on the right side of the upper end bracket 5 in the drawing. Also,
An outlet pipe portion 5f for returning engine cooling water in the heat exchange section 7 to a cooling water pipe (not shown) via a cooling water passage 5e is connected to an outer peripheral wall on the left side of the upper end bracket 5 in the drawing.

An oil filter 3 is provided inside the union 6.
A communication passage 6a is formed to communicate the inside of the inside with the introduction path 2b. The union 6 has a male screw 6 b fastened to the engine 2 on the outer periphery of the engine 2 side end, an oil filter 3
A side end has a male screw 6c for fastening the oil filter 3 and a hexagonal portion 6d which comes into contact with the upper end bracket 5.
The oil cooler 1 is configured to apply a rotational force to the hexagonal portion 6d with a tool such as a wrench so that the male screw 6b is screwed into the engine 2 and the hexagonal portion 6d presses the oil cooler 1 against the engine 2 to generate oil. The cooler 1 is attached to the engine 2 and fixed.

FIG. 2 is a diagram showing a main part of the heat exchange section. The heat exchange unit 7 includes a fin plate 13 having a different shape from the first forming plate 11 and the second forming plate 12 between the first forming plate 11 and a second forming plate 12 having a different shape from the first forming plate 11. A joint body 8 (see FIG. 3) having the same shape sandwiching the
In addition, it is composed of a laminate in which a plurality of the joined bodies 8 are laminated in the thickness direction. Note that an upper end plate 14 having a shape different from the first forming plate 11 and the second forming plate 12 is disposed at an upper end of the laminate, and an upper end plate 1 is disposed at a lower end of the laminate.
A lower end plate 15 having a shape different from that of the lower plate 4 is provided.

FIG. 4 is a view showing the first forming plate. The first forming plate 11 is a flat plate of the present invention, and is made of, for example, a metal such as an aluminum alloy, and is formed in a substantially annular plate shape by, for example, punching with a press. The first forming plate 11 has a thickness of 0.8, for example.
mm, an annular inner frame portion 16 forming the inner peripheral wall of the heat exchange section 7 is formed on the inner peripheral edge side end face, and an annular inner frame section 16 forming the outer peripheral wall of the heat exchange section 7 is formed on the outer peripheral edge side end face. An outer frame portion 17 is formed. In the inner frame portion 16, a first communication hole 16a penetrating the inner frame portion 16 in the thickness direction is formed on the same circumference. The first communication hole 16a is formed of six holes, is formed in a substantially arcuate and flat shape, and the engine oil flows therein. Further, on the inner periphery of the inner frame 16, four positioning grooves 16 b into which the assembling jig 37 is fitted when assembling the heat exchanger 7 are formed.

The first communication hole 16a on the upper side in FIG.
On the outer peripheral side, five rows of flat arc-shaped portions 181 are sequentially formed toward the outer frame portion 17. Each arc-shaped portion 181 of each row is provided with one first communication hole 17a so as to penetrate the arc-shaped portion 181 in the thickness direction.
Each of the first communication holes 17a is formed in a substantially arcuate and flat shape, and the engine oil flows therein.
Note that the arc-shaped portions 181 in each row are respectively connected to the first connecting pieces 1.
8 are connected in the radial direction, and are also connected to the inner frame 16 and the outer frame 17.

The three first connecting pieces 19 are provided between the inner frame 16 and the outer frame 17 except for the plurality of arc-shaped portions 181.
Are formed in order from the inner frame 16 to the outer frame 17. The arcuate portions 191 of each row are provided with a plurality of substantially arcuate and flat first communication holes 17b penetrating the arcuate portions 191 in the thickness direction. In addition, each 1st communication hole 17b is
They are arranged substantially radially from the inner frame 16 to the outer frame 17. The first communication holes 17b in each row are composed of a first hole group opened on the same circumference as the first communication hole 17a and a second hole group opened slightly inward from the first hole group. Have been.

The upper half of the first forming plate 11, which is defined by the first connecting pieces 18 and 19 and surrounds the arc-shaped portion 181, has a second communication hole 19a through which engine cooling water flows. , 19b are formed. Further, the lower half of the first forming plate 11 and the first
In a portion defined by the connecting piece 19 and surrounding the arc-shaped portion 191, two arc-shaped second communication holes 19c of six rows in which the engine cooling water flows are formed at two locations each on the same circumference. . Here, in the first forming plate 11,
The inner frame portion 16, the outer frame portion 17, the first connecting pieces 18, 19, and the arc-shaped portions 181, 191 constitute a plate wall portion of the present invention.

FIG. 5 is a view showing the second forming plate. The second forming plate 12 is a flat plate of the present invention, and is made of, for example, a metal such as an aluminum alloy, and is formed in a substantially annular plate shape by, for example, punching with a press. The second forming plate 12 has, for example, a plate thickness of 0.8.
At the position corresponding to the inner frame 16 of the first forming plate 11 in mm, an inner frame 20 constituting the inner peripheral wall of the heat exchange unit 7 is provided. On the outer peripheral side of the second forming plate 12, an outer frame portion 21 that forms the outer peripheral wall of the heat exchange unit 7 is formed. An arc-shaped first communication hole 20a penetrating the inner frame portion 20 in the thickness direction is formed in the inner frame portion 20 on the same circumference. These first communication holes 20a are formed of six holes, are opened at positions corresponding to the respective first communication holes 16a formed in the first forming plate 11, and each of the first communication holes 20a is formed. It communicates with each of the holes 16a. A groove 20 for positioning which is fitted to an assembling jig 37 when assembling the heat exchanging part 7 is provided on an inner periphery of the inner frame part 20.
b are formed at four places.

On the outer peripheral side of the first communication hole 20a on the upper side in FIG. 5, five flat arc-shaped portions 221 are sequentially formed toward the outer frame portion 21. Arc-shaped part 22 of each row
Each of the first communication holes 1 is formed with a substantially arc-shaped and flat first communication hole 21a penetrating the arc-shaped portion 221 in the thickness direction.
These first communication holes 21a are connected to the respective first communication holes 17a.
, Respectively, and communicate with the first communication holes 17a. The arc-shaped portions 221 in each row are radially connected to the second connecting pieces 22, respectively, and are also connected to the inner frame portion 20 and the outer frame portion 21. The first communication holes 21a are each formed in a substantially arcuate and flat shape, and the engine oil flows therein.

The inner frame portion 20 excluding the arc-shaped portion 221
Between the inner frame 20 and the outer frame 21, five rows of arc-shaped portions 231 connected by eight second connecting pieces 23 are connected between the inner frame 20 and the outer frame 2.
1 are sequentially formed. Arc-shaped part 23 of each row
In FIG. 1, a plurality of first communication holes 21b having a substantially arc-shaped and flat shape are formed so as to penetrate the arc-shaped portions 231 in the thickness direction. In addition, the first communication hole 21b is connected to the first communication hole 2
The first hole group is opened on the same circumference as 1a, and the second hole group is opened slightly inward from the first hole group. Each of the first communication holes 21b is formed in a substantially arcuate and flat shape, and is opened at a position corresponding to each of the first communication holes 17b.
It communicates with each of the communication holes 17b.

In the upper half of the second forming plate 12, which is defined by the second connecting pieces 22 and 23 and surrounds the five rows of arc-shaped portions 221, the second communication holes 19 are formed.
a and 23b, the second communication holes 23a and 23 respectively communicate with the 19b.
b is formed. In the lower half of the second forming plate 12, which is defined by the adjacent second connecting piece 23 and surrounds the arc-shaped portion 231, the second communication hole 1 is formed.
A plurality of arc-shaped second communication holes 23c respectively communicating with 9a, 19b and the second communication hole 19c are formed on the circumference. In the second forming plate 12, the inner frame portion 20, the outer frame portion 21, the second connecting pieces 22 and 23, and the arc-shaped portions 221 and 231 constitute a plate wall portion of the present invention.

FIG. 6 shows a fin plate.
The fin plate 13 is a flat plate of the present invention, and constitutes an inner fin that improves the heat transfer efficiency of engine oil and improves the heat exchange efficiency between engine oil and engine cooling water. This fin plate 13
For example, it is made of a metal such as an aluminum alloy, and is formed in a substantially annular plate shape by, for example, punching with a press. Also,
The fin plate 13 has a thickness of 0.1 mm, for example, and has an inner frame portion 24 that forms the inner peripheral wall of the heat exchange portion 7 at a position corresponding to the inner frame portions 16 and 20, and corresponds to the outer frame portion 17. An outer frame part 25 that constitutes the outer peripheral wall of the heat exchange part 7 is provided at the position. An arc-shaped first communication hole 24a penetrating the inner frame portion 24 in the thickness direction is formed in the inner frame portion 24 on the same circumference. Each first communication hole 24a has six holes, and
They communicate with the communication holes 16a and 20a, respectively. Also,
On the inner periphery of the inner frame portion 24, four positioning grooves 24b to be fitted to the assembling jig 37 when assembling the heat exchange portion 7 are formed.

The fin plate 13 has an arc-shaped portion 261 at a position corresponding to the arc-shaped portion 181. The arc-shaped portion 261 has a first communication hole 25a formed on the same circumference. These first communication holes 25
a is composed of a plurality of holes, and the first communication holes 17a, 21
a at the position corresponding to the first communication hole 17a,
21a. The arc-shaped portions 261 are radially connected by the connecting pieces 26, respectively, and the inner frame portion 24 and the outer frame portion 25 are connected to each other.
Is also linked.

The inner frame portion 24 excluding the arc-shaped portion 261
An arc-shaped portion 271 connected by five connecting pieces 27 is formed between the inner frame portion 24 and the outer frame portion 25 between the outer frame portion 25 and the outer frame portion 25. The arc-shaped portions 271 of each row are provided with a plurality of substantially arc-shaped and flat first communication holes 25b penetrating the arc-shaped portions 271 in the thickness direction. Further, the first communication holes 25b are provided in the respective first communication holes 17.
Opened at positions corresponding to b and 21b, and communicate with the first communication holes 17b and 21b, respectively. It comprises a first hole group opened on the same circumference as the first communication hole 25a, and a second hole group opened slightly inward from the first hole group.

The upper half of the fin plate 13 is defined by the connecting pieces 26 and 27,
The second communication holes 26a and 26b penetrating the fin plate 13 in the thickness direction are formed in a portion surrounding the fin plate 13. The second communication holes 26a and 26b are
a, 19b, 23a, and 23b.
In the lower half of the fin plate 13, around the arc-shaped portion 271, a portion defined by the two connecting pieces 26 and 27 is provided with a second arc-shaped second portion penetrating the fin plate 13 in the thickness direction. The communication holes 26c are respectively formed so as to be on the same circumference. These second communication holes 26c communicate with the second communication holes 19a to 19c and 23a to 23c, respectively. In the fin plate 13, the inner frame 2
4, outer frame part 25, connecting pieces 26 and 27 and arc-shaped part 26
1, 271 constitute the plate wall of the present invention.

As shown in FIG. 7, the upper end plate 14 is made of a metal such as an aluminum alloy, and is formed by, for example, punching a press.
And an outer peripheral surface is provided with an annular plate portion 28 which constitutes an outer peripheral wall of the heat exchange section 7. The annular plate portion 28 includes first communication holes 16a and 20a and first communication holes 24a.
Six arc-shaped first communication holes 28a are drilled at the corresponding positions on the same circumference, and four positioning grooves 28b are formed on the inner circumference. Those first communication holes 2
8a is a first communication hole 16a, 20a and a first communication hole 2
4a.

The annular plate portion 28 has the first communication hole 17.
a, 17b, 21a, 21b and the first communication hole 25a,
25b, and the first communication hole 1 is opened.
7a, 17b, 21a, 21b and first communication hole 25
a, 25b, the first communication holes 29a, 29, respectively.
b is formed on the circumference. And the first communication hole 29
a, 29b also communicate with the outlet hole 5b of the upper end side bracket 5. For this reason, the first communication holes 29a, 29b
Forms an outlet for the engine oil from the heat exchange section 7.

Further, the second communication hole 1 is provided in the annular plate portion 28.
Circular communication ports 30a and 30b are formed to communicate with 9a, 23a, 19b and 23b, respectively. The communication ports 30a and 30b communicate with the cooling water passages 5c and 5e of the upper bracket 5, respectively. Therefore, the communication port 30a forms an inlet for the engine cooling water to the heat exchange unit 7, and the communication port 30b forms an outlet for the engine cooling water from the heat exchange unit 7. The annular plate portion 28 is formed so as to close positions corresponding to the second communication holes 19c and 23c and the second communication hole 26c.

As shown in FIG. 8, the lower end plate 15 is made of a metal such as an aluminum alloy, and is formed by, for example, punching a press.
And an annular plate portion 31 whose outer peripheral surface forms the outer peripheral wall of the heat exchange section 7. The annular plate portion 31 has six first circular communication holes 31a formed on the same circumference at positions corresponding to the first communication holes 16a, 20a, 28a and the first communication hole 24a. On the inner periphery, four positioning grooves 31b are formed. Their first
The communication hole 31a communicates with the first communication holes 16a, 20a, 28a and the first communication hole 24a, respectively. The first communication holes 17a, 17b, 21a, 21
b, 29a, 29b and the first communication holes 25a, 25b, respectively.
7b, 21a, 21b, 29a, 29b and the first communication holes 32 communicating with the first communication holes 25a, 25b, respectively.
a and 32b are formed on the circumference. The first communication holes 32a, 32b also communicate with the entrance hole 4b of the lower end bracket 4. For this reason, the first communication hole 32a,
32b forms an inlet for the engine oil to the heat exchange section 7. Note that the annular plate portion 31 is provided with the second communication holes 19a to 19a.
9c, 23a to 23c and second communication holes 26a to 26c
Is formed so as to close the position corresponding to.

As shown in FIG. 2, the heat exchanging portion 7 is formed by laminating a plurality of such joined bodies 8 on the outer periphery of the union 6 so that the cross-sectional shape of each plate extending in the plate thickness direction is flat. A plurality of circular arc-shaped flow pipes 34 are formed substantially radially. A plurality of oil passages 35 through which the engine oil flows from the lower end plate 15 to the upper end plate 14 are formed inside the flow pipes 34.
The plurality of oil passages 35 include first communication holes 17a, 17b,
21a, 21b, 29a, 29b, 32a, 32b and the first communication holes 25a, 25b communicate with each other. The engine oil is shown in FIG. 9 and FIG.
As shown by a broken line arrow in FIG.

A plurality of cooling water passages 36 through which engine cooling water flows are formed between adjacent joined bodies 8 and around the plurality of flow pipes 34. These cooling water passages 3
Reference numeral 6 denotes a flow passage according to the present invention, and the second communication holes 19a to 1
9c, 23a to 23c and second communication holes 26a to 26c
Are connected to each other. As shown by solid arrows in FIGS. 9 and 10, the engine cooling water
The fluid flows through each joined body 8 so as to sew around the plurality of flow pipes 34. The engine cooling water flows through the cooling water passage 36 formed around the plurality of flow pipes 34 in the surface direction of the joined body 8, and flows through the oil passage 35 and the engine oil flowing through the cooling water passage 36. The engine oil is cooled by heat exchange with the cooling water.

A method of assembling the heat exchange portion 7 of the oil cooler 1 will be described with reference to FIGS. First, the first
Four grooves 16b formed on the inner periphery of the forming plate 11
The first forming plate 11 is fitted to the outside of the four assembling jigs 37 while contacting the four assembling jigs 37. Further, the second forming plate 12, the fin plate 1
3. Similarly, the upper end plate 14 and the lower end plate 15 contact the grooves 20b, 24b, 28b, 31b with the four assembling jigs 37, while the second forming plate 12,
The fin plate 13, the upper end plate 14, and the lower end plate 15 are fitted to the outside of the assembly jig 37.
Then, the upper end plate 14 is disposed at the upper end of the stacked body in which the fin plate 13 is interposed between the first forming plate 11 and the second forming plate 12 in a plurality of manners as described above. After disposing the lower end plate 15 at the lower end of the laminate, the upper end bracket 5 and the lower end bracket 4 are assembled, for example, put in a furnace, and the laminate is integrally joined by means such as brazing. The oil cooler 1 is manufactured.

The operation of the oil cooler 1 will be described with reference to FIGS. The engine oil for lubricating the sliding portion of the engine 2 is supplied to an outlet 2 formed in the engine 2.
1 and flows into the oil cooler 1 from a plurality of inlet holes 4b formed in the lower end bracket 4 as shown by the broken arrows in FIG. The engine oil passes through a plurality of inlet holes 4b formed in the lower bracket 4 as shown by the broken arrows in FIG.
Flows into the plurality of flow pipes 34 from the first communication holes 31a, 32a, 32b. The engine oil that has flowed into the plurality of flow pipes 34 flows in the longitudinal direction of each flow pipe 34, as indicated by broken arrows in FIGS. 1, 9, and 10. That is, the engine oil is supplied to the first communication holes 16 a and 17 formed in the first molding plate 11.
a, 17b, the first communication holes 24a, 25a, 25b formed in the fin plate 13, and the first communication holes 20a, 21a, 21b formed in the second forming plate 12.

On the other hand, the engine cooling water in the cooling water pipe is
As shown by the solid line arrow in FIG. 1, the cooling water of the oil cooler 1 passes through the inlet pipe 5 d and the cooling water passage 5 c formed in the upper bracket 5, and from the communication port 30 a formed in the upper plate 14. It flows into the passage 36. Cooling water passage 3
As shown by solid arrows in FIGS. 1, 9, and 10, the engine cooling water flowing into the inside 6 is guided between the adjacent joined bodies 8 and around the plurality of flow pipes 34. That is, as shown in FIGS. 9 and 10, the engine cooling water sewes the inner frame portion 16, the first connecting pieces 18 and 19, and the arc-shaped portions 181 and 191 formed on the first forming plate 11. Flows. Further, the inner frame portion 24, the connecting pieces 26 and 27, and the arc-shaped portions 261 and 27 formed on the fin plate 13 are provided.
It flows like sewing 1.

Further, the inner frame portion 20, the second connecting pieces 22, 23, and the arc-shaped portion 22 formed on the second forming plate 12 are formed.
1 and 231 to sew the first forming plate 11
, The second communication holes 26a to 26c formed in the fin plate 13, and the second communication holes 23a to 23c formed in the second molding plate 12.
Pass through. For this reason, when the engine oil flows inside the plurality of flow pipes 34 in the laminating direction of the bonded body 8 as shown by the dashed arrows in the drawing, the surface of the bonded body 8 is sewn to the outside of the plurality of flow pipes 34. The heat is exchanged with the engine cooling water flowing in the direction through the flow pipe 34 to be cooled.

The cooled engine oil flows out of the first communication holes 28a, 29a, 29b formed in the upper end plate 14 and is formed in the upper end bracket 5, as indicated by the broken arrows in FIG. The oil is discharged to the outside of the oil cooler 1 from the plurality of outlet holes 5b. The engine oil discharged to the outside of the oil cooler 1 flows into the oil filter 3 and is filtered, and then flows from the end of the union 6 on the oil filter 3 side as shown by a broken line arrow in FIG. After returning from the end of the union 6 on the engine 2 side into the introduction path 2b of the engine 2 through the communication path 6a, the union 6 is guided to the oil pan or the sliding portion by the introduction path 2b.
On the other hand, as shown by the solid line arrows in FIG. 1, the engine cooling water that has been heated by depriving the heat retained by the engine oil has the communication port 30 b formed in the upper end plate 14 and the cooling water formed in the upper end bracket 5. Outlet pipe 5 through water passage 5e
f, flows out of the oil cooler 1, is cooled by a radiator (not shown), and is returned to the oil cooler 1 again.

As described above, in this embodiment, a plurality of joined bodies 8 having the fin plate 13 sandwiched between the first forming plate 11 and the second forming plate 12 formed by punching of a press, for example, are provided. By stacking and manufacturing the heat exchange section 7, a plurality of flow pipes 34 are formed in the stacking direction, and a plurality of oil passages 35 are formed inside these flow pipes 34. Therefore, the first forming plate 11, the second forming plate 12, and the fin plate 13
Since no bulging portion is formed in the same volume, it is possible to arrange more flow path tubes 34 in the same volume, and it is possible to increase the heat radiation area. In addition, since there is no protrusion that inhibits the flow of the engine oil in the extension direction of the flow path pipe 34, the flow velocity of the engine oil near the wall surface when passing through the flow path pipe 34 is increased. The heat exchange efficiency between the engine and the engine cooling water can be improved.

Furthermore, since only the punching of the press is used to form the first forming plate 11, the second forming plate 12, and the fin plate 13, a brazing plane is secured when brazing the plates. Easy to do.
Then, since there is no variation in the close contact state between the plates, it is possible to prevent the occurrence of brazing failure between the plates. Since there is no bent portion in each plate, the plate is structurally strong, and buckling can be prevented even when the oil filter 3 is fastened to the union 6.

FIGS. 11 and 12 show a second embodiment of the present invention. FIG. 11 shows a first forming plate, and FIG. 12 shows a second forming plate. First
The forming plate 11 has an annular inner frame portion 41 on the end surface on the inner peripheral edge side, and has an annular outer frame portion 42 on the end surface on the outer peripheral edge side. In FIG. 11, five rows of arc-shaped portions 431 connected by two first connection pieces 43 to the outer frame portion 42 are sequentially formed on the outer peripheral side of the upper inner frame portion 41. The arc-shaped portions 431 of each row are formed with five first communication holes 42a on the same circumference, through which the engine oil flows.

Further, in FIG. 11, the lower inner frame 4
An arc-shaped portion 441 connected by two first connection pieces 44 to the outer frame portion 42 is sequentially formed on the outer peripheral side of 1. In each of the arc-shaped portions 441 of each row, nine first communication holes 42b through which the engine oil flows are formed on the same circumference, nine each. The first connecting piece 4 is located between the upper arc-shaped portion 431 and the lower arc-shaped portion 441.
Second communication holes 43a and 43b through which the engine cooling water flows are formed in portions partitioned by 3 and 44.
In addition, between the adjacent first connecting pieces 43 and around the arc-shaped portion 431, a second portion through which the engine coolant flows.
A communication hole 43c is formed. In addition, the first
Between the connecting pieces 44 and around the arc-shaped portion 441,
A second communication hole 43d through which the engine cooling water flows is formed. In the first forming plate 11, the inner frame portion 41, the outer frame portion 42, the first connecting pieces 43 and 44, and the arc-shaped portions 431 and 441 constitute a plate wall portion of the present invention.

The second forming plate 12 has an inner frame 60 at a position corresponding to the inner frame 41 and an outer frame 45 at a position corresponding to the outer frame 42. In FIG. 12, five arc-shaped portions 461 connected to the outer frame portion 45 by the five second connection pieces 46 are formed on the outer side of the inner frame portion 60 on the upper side in the circumferential direction. I have. Each arc-shaped portion 46
1, five first communication holes 45a respectively communicating with the first communication holes 42a are formed in the radial direction one by one. Further, on the outer peripheral side of the lower inner frame portion 60 in FIG.
Five arc-shaped portions 471 connected to each other by the nine second connection pieces 47 up to the outer frame portion 45 are sequentially formed. In each of the arc portions 471, nine first communication holes 45b communicating with the first communication holes 42b are formed sequentially in the radial direction by nine pieces.

Then, between the upper arc-shaped portion 461 and the lower arc-shaped portion 471 and defined by the second connecting pieces 46 and 47, the second communication holes 43a and 43b are provided respectively. Second communication holes 46a and 46b that communicate with each other are formed. Further, between the adjacent second connection pieces 46, second communication holes 46c respectively communicating with the second communication holes 43c are formed. Further, between the adjacent second connection pieces 47, second communication holes 46d respectively communicating with the second communication holes 43d are formed. In the second forming plate 12, the inner frame portion 60, the outer frame portion 45, the second connecting pieces 46 and 47, and the arc-shaped portions 461 and 471 constitute a plate wall portion of the present invention.

FIGS. 13 and 14 show a third embodiment of the present invention. FIG. 13 shows a first forming plate, and FIG. 14 shows a second forming plate. First
The forming plate 11 has an annular inner frame portion 40 on an inner peripheral edge side end surface and an annular outer frame portion 48 on an outer peripheral edge side end surface. On the outer peripheral side of the inner frame portion 40 on the upper side in FIG. 13, five rows of arc-shaped portions 491 connected by two first connecting pieces 49 to the outer frame portion 48 are sequentially formed. Five arcuate portions 491 in each row are formed with five first communication holes 48a on the same circumference, through which engine oil flows.

On the outer peripheral side of the upper inner frame portion 40 in FIG. 13, five rows of arc-shaped portions 501 connected by two first connecting pieces 50 to the outer frame portion 48 are sequentially formed. I have. Nine first communication holes 48b through which engine oil flows are formed in the arc-shaped portions 501 of each row on the same circumference. Then, between the upper arc-shaped portion 491 and the lower arc-shaped portion 501, the first connecting pieces 49, 5
Second communication holes 49a and 49b through which the engine cooling water flows are formed in the section defined by 0. Also,
An arc-shaped portion 491 between the adjacent first connection pieces 49
Around the second, a plurality of second
A communication hole 49c is formed. In addition, the first
Between the connecting pieces 50 and around the arc-shaped portion 501,
A second communication hole 49d through which the engine cooling water flows is formed. In the first forming plate 11, the inner frame portion 40, the outer frame portion 48, the first connecting pieces 49 and 50, and the arc-shaped portions 491 and 501 constitute a plate wall portion of the present invention.

The second forming plate 12 has an inner frame 51 at a position corresponding to the inner frame 40 and an outer frame 52 at a position corresponding to the outer frame 48. Two fan-shaped portions 53 and 54 are formed between the inner frame portion 51 and the outer frame portion 52, respectively. Note that, in the second forming plate 12, the inner frame portion 51, the outer frame portion 52, and the fan-shaped portions 53 and 54 constitute a plate wall portion of the present invention. In the fan-shaped portion 53 on the upper side in FIG. 14, the first communication holes 48a are respectively connected to the first communication holes 48a.
Five communication holes 52a are respectively opened on the same circumference. Further, in the fan-shaped portion 54 on the lower side of FIG. 14, nine first communication holes 52b respectively communicating with the first communication holes 48b are respectively opened on the same circumference.

Then, between the two fan-shaped portions 53 and 54,
Second communication holes 53a and 53b communicating with the second communication holes 49a and 49b, respectively, are open. The fan-shaped portion 53 has a second communication hole 49c between the adjacent first communication holes 52a.
Are formed with the second communication holes 53c respectively communicating with the second communication holes 53c. Further, the fan-shaped portion 54 has a first communication hole 52 adjacent thereto.
A second communication hole 53d communicating with the second communication hole 49d is formed between b.

FIGS. 15 to 18 show a fourth embodiment of the present invention, and FIG. 15 shows an oil cooler. In this embodiment, as shown in FIGS. 16 to 18, the outer frame 17, outer frame 21, and outer frame 21 are formed by the first forming plate 11, the second forming plate 12, and the fin plate 13 of the first embodiment. This is an example in which the housing 9 is provided on the outer peripheral side of the heat exchange unit 7 by abolishing 25. In addition, the inlet pipe 5d and the outlet pipe 5f are eliminated from the upper end bracket 5. The housing 9 is made of a metal such as an aluminum alloy and is formed in a cylindrical shape, and an outer peripheral wall of the housing 9 has an inlet pipe 9 through which engine cooling water flows into the housing 9.
a, and an outlet pipe portion 9b through which the engine cooling water in the housing 9 flows out. This housing 9
Is the outer cylinder wall 4 of the lower end side bracket 4
c, the end of the oil filter 3 side is fitted to the outer periphery of the flange 5g of the upper end bracket 5,
These are joined by means such as brazing.

FIGS. 19 and 20 show a fifth embodiment of the present invention, in which a lower bracket is shown. Since the upper end side plate 14 of the first embodiment is diverted to the lower end side plate 15 of this embodiment, the circular plate communicating with the second communication holes 19a, 23a, 19b, and 23b in the annular plate portion respectively. Communication ports 30a and 30b are formed. The lower end bracket 4 has communication ports 30a, 30b
A substantially trapezoidal seal portion 4d is formed to be joined to the annular plate portion of the lower end plate 15 by brazing or the like in order to close the seal portion 4d. Therefore, in the first embodiment, five types of plates are required to configure the heat exchange unit 7, but the heat exchange unit 7 can be configured by four types of plates, so that the number of parts can be reduced.

FIGS. 21 to 23 are views showing a sixth embodiment of the present invention. FIG. 21 is a view showing a main part of the heat exchange section 7, and FIG. 22 is a view showing a fin plate. The fin plate 13 of this embodiment has a claw portion 55 only on a portion of the inner periphery of the outer frame portion 25 facing the second communication hole 26a,
The left and right shapes are formed to be asymmetrical with respect to the imaginary line in the vertical direction. And the heat exchange section 7
As shown in FIG. 23, the fin plate 13 disposed between the first forming plate 11 and the second forming plate 12
Are turned over (fin plate 13a) one by one. Therefore, the heat exchange unit 7
Since the oil passages 35 are in a staggered arrangement as shown in FIG. 7, the heat exchange efficiency of the heat exchange unit 7 is improved as compared with the first embodiment. Note that the claw portion 55 is connected to the fin plate 13.
Is formed in order to easily identify the mounting direction.

FIGS. 24 and 25 show a seventh embodiment of the present invention. FIG. 24 shows a heat exchange section.
FIG. 3 is a view showing a molding plate. The right half of the forming plate 56 of this embodiment has the same shape as the first forming plate 11 of the first embodiment so that the left and right shapes are asymmetrical about the imaginary line in the vertical direction. One half has the same shape as the second forming plate 12 of the first embodiment. Then, the heat exchange section 7 joins the fin plate 13 between the forming plate 56 and a forming plate 56a obtained by inverting the forming plate 56, and forms the forming plate 56a.
And a plurality of joined bodies 8 each having an inverted fin plate 13a joined to the lower end surface of the joined body. In addition, the heat exchange part 7
As in the case of the first embodiment, the oil passages 35 have a staggered arrangement, so that the heat exchange efficiency of the heat exchange unit 7 is higher than that of the first embodiment. Therefore, in the first embodiment, three types of plates are required to form the joined body 8, but the joined body 8 can be constituted by two kinds of plates, so that the number of parts can be reduced.

FIGS. 26 to 29 show an eighth embodiment of the present invention. FIG. 26 shows a main part of the heat exchange section 7, and FIG. 27 shows a joined body. As shown in FIG. 28, the first forming plate 57 of this embodiment has a left half having the same shape as the left half of the second forming plate 12 of the first embodiment, and a right half having the same shape as the sixth embodiment. It has the same shape as the right half of the fin plate 13. As shown in FIG. 29, the second forming plate 58 has a left half having the same shape as the left half of the second forming plate 12 of the first embodiment, and a right half having the same shape as the sixth embodiment. The fin plate 13 has the same shape as the inverted half of the left half. The heat exchange section 7 includes a first forming plate 57, a first forming plate 57a obtained by inverting the first forming plate 57, a second forming plate 58, and a second forming plate 58.
It is formed by laminating a plurality of joined bodies 8 (see FIG. 27) obtained by joining a second forming plate 58a in which the forming plate 58 is inverted. In the heat exchange unit 7, as shown in FIG. 26, since the oil passages 35 are in a staggered arrangement, the heat exchange efficiency of the heat exchange unit 7 is higher than in the first embodiment.

FIGS. 30 to 34 show a ninth embodiment of the present invention, in which a heat exchanger is shown. The heat exchanger 61 of this embodiment includes an upper container 62, a lower container 63,
It is composed of an upper end plate 64, a lower end plate 65, a first flat plate 66 and a second flat plate 67. The upper end side container 62 is formed in a rectangular box shape,
An inlet chamber 62a into which a first heat medium (for example, engine oil or the like) flows is formed therein.
The side end surface (lower end surface) is open. The upper container 6
A circular opening 62b communicating with the entrance chamber 62a is formed at the center of the ceiling wall of No.2. This opening 62b
From above, a circular inlet pipe 68 extends upward. The lower end side container 63 is formed in a shape in which the upper end side container 62 is turned over, and similarly to the upper end side container 62, an outlet chamber 63a and a circular opening 63b are formed. A circular outlet pipe 69 extends downward from this opening 63b.

The upper end plate 64 is formed in a rectangular shape, and has an elliptical first communication hole 64a communicating with the inlet chamber 62a and the outlet chamber 63a in the center. A second communication hole 64 through which a second heat medium (for example, engine cooling water) passes is provided at the right end of the upper end side plate 64.
b is formed. A circular inlet pipe 70 extends upward from the second communication hole 64b. The lower end plate 65 is formed in a shape in which the upper end side plate 64 is turned upside down and the left and right sides are reversed, and similarly to the upper end side plate 64, an oval first communication hole 65a is formed in the center. The second communication hole 65 at the left end.
b is formed. Also, from the second communication hole 65b,
A circular outlet pipe 71 extends downward.

The first flat plate 66 has a rectangular annular outer frame portion 661 constituting an outer peripheral wall, and an oval island portion connected to the inner peripheral side of the outer frame portion 661 via a connecting piece 72. 721. This island-shaped portion 721 has a first communication hole 6
4a, 65a are opened at positions corresponding to the inlet chambers 62a,
A first communication hole 72a communicating with the outlet chamber 63a and the first communication holes 64a and 65a is formed. A second communication hole 72b communicating with the second communication holes 64b and 65b is formed in a portion defined by the connecting piece 72 and surrounding the island-shaped portion 721. In the first flat plate 66, the connecting piece 72, the outer frame portion 661, and the island-shaped portion 721 constitute a plate wall portion of the present invention. Second flat plate 67
Is connected via a square annular outer frame portion 671 formed at a position facing the outer frame portion 661 and a connecting piece 73 arranged at a position different from the connecting piece 72 on the inner peripheral side of the outer frame portion 671. It has an oval island-shaped portion 731 formed. This island 7
31 is opened at positions corresponding to the first communication holes 64a, 65a and the first communication hole 72a, and the inlet chamber 62a, the outlet chamber 63a, the first communication holes 64a, 65a, and the first communication hole 7 are opened.
A first communication hole 73a communicating with 2a is formed. A second communication hole 73b communicating with the second communication holes 64b and 65b and the second communication hole 72b is formed in a portion defined by the connecting piece 73 and surrounding the island-shaped portion 731.
In the second flat plate 67, the connecting piece 73, the outer frame 671 and the island 731 constitute a plate wall of the present invention.

Then, these are stacked in the order of the upper end container 62, the upper end plate 64, the first flat plate 66, the second flat plate 67, the lower end plate 65, and the lower end container 63, and then brazed or the like. The heat exchanger 61 is manufactured by joining. Then, by laminating the plates, the heat exchanger 61 is formed with only one flow tube 74 having a flat cross section extending in the plate thickness direction of each plate. Further, the first inside of the flow path tube 74 is
A first heat medium passage 75 through which the heat medium flows from the upper container 62 toward the lower container 63 is formed. The second heat medium passage 7 around which the second heat medium flows flows around the flow path pipe 74.
6 are formed.

The operation of the heat exchanger 61 will be described with reference to FIGS. The first heat medium flows into the inlet chamber 62a through the inlet pipe 68 formed in the upper end container 62, as indicated by the solid arrow in FIG. And
The first heat medium passes through the first communication holes 64a formed in the upper end plate 64, and as shown by solid arrows in FIG. 33, the island-shaped portions 721 and the second flat plate 67 of the first flat plate 66. Flows through the flow path tube 74 (first heat medium passage 75) constituted by the island-shaped portion 731 of the first embodiment. That is, the first heat medium passes through the first communication holes 72a formed in the first flat plate 66 and the first communication holes 73a formed in the second flat plate 67.

On the other hand, the second heat medium flows into the second heat medium passage 76 through the inlet pipe 70 formed in the upper end plate 64, as shown by the solid arrow in FIG. That is, the second heat medium is sewn on the island-shaped portion 721 and the connection piece 72 formed on the first flat plate
The second portion is passed through the communication hole 72b and further sewn the island-shaped portion 731 and the connecting piece 73 formed on the second flat plate 67.
It passes through the communication hole 73b. Then, the second heat medium that has passed through the second heat medium passage 76 flows out of the heat exchanger 61 from the outlet pipe 71 through the second communication hole 65b formed in the lower end plate 65.

Therefore, when the first heat medium flows through the inside of the flow pipe 74 in the laminating direction of the heat exchanger 1,
The heat is exchanged with the second heat medium flowing so as to sew around the periphery through the flow path tube 74. And the first heat medium that has exchanged heat is
The gas flows out of the heat exchanger 61 from the outlet pipe 69 through the first communication hole 65a formed in the lower end plate 65 and the outlet chamber 63a formed in the lower container 63. In this embodiment, since there is no protrusion that inhibits the flow of the engine oil in the extension direction of the flow pipe 74, the flow velocity of the engine oil near the wall surface when passing through the flow pipe 74 is high. Therefore, the heat exchange efficiency between the engine oil and the engine cooling water can be improved.

FIG. 35 is a view showing a tenth embodiment of the present invention, and is a view showing a first forming plate. The first forming plate 11 includes a plurality of inner peripheral sides that radially connect the inner frame portion 16 and the first and second rows of arc-shaped portions 111 and 112 formed on the inner frame portion 16 side. Connecting wall 77, second to second
An intermediate connecting wall portion 78 radially connecting the fourth row of arc portions 112 to 114, an outer frame portion 17, and fourth and fifth row arc portions formed on the outer frame portion 17 side; The outer peripheral side connecting wall portion 79 that radially connects the first and second connecting portions 114 and 115 is formed at a different angle. That is, the inner peripheral side connecting wall portion 7
7, the intermediate connecting wall 78 and the outer circumferential connecting wall 79
It is formed so as not to be located on the same imaginary line extending in the radial direction from the center point of the forming plate 11.

In this embodiment, the connecting walls of the first connecting piece 19 are not provided in all six rows of the second communicating holes 19a to 19c as in the first embodiment, but the second communicating holes 19a to 19c are provided.
By providing the connection wall portions only in two rows out of the six rows of c, the second wall in the specific cross section of the first forming plate 11 can be formed.
The passage resistance of the cooling water flowing in the communication holes 19a to 19c is reduced. In addition, the connection wall of the second forming plate 12 and the fin plate 13 may be similarly shifted in angle.

FIGS. 36 to 44 show an eleventh embodiment of the present invention. FIG. 36 shows an oil cooler.
37 and 38 are views showing the lower end bracket. This oil cooler 1 has, as shown in FIG.
A relief valve 80 for maintaining the pressure in the heat exchange unit 7 at a predetermined pressure is attached, and a bypass passage 81 for bypassing the engine oil from the plurality of oil passages 35 is formed. As shown in FIGS. 37 and 38, the lower end bracket 4 is provided with an O-ring 4a between the lower bracket 4 and the engine, and a plurality of inlet holes 4b for introducing engine oil into the heat exchange section 7. Is formed. Further, an annular holding portion 4f for holding the relief valve 80 is formed in the upper end side wall portion 4e in FIG. The holding portion 4f has an upper end side wall 4e on the heat exchange portion 7 side.
It is formed so that the inner diameter becomes smaller. As shown in FIG. 36, a cooling water pipe 5
An inlet pipe part 5i for introducing the cooling water in the heat exchanger h into the heat exchange part 7 is inserted.

FIG. 39 is a view showing the first forming plate. The first forming plate 11 has a cooling water passage 36 between the upper inner frame 16 and the upper outer frame 17.
The partition wall portion 182 that partitions between the second communication holes 19a and 19b is formed. On the inner peripheral edge side of the partition wall portion 182, a convex bypass hole 18a through which engine oil flows is formed so as to penetrate the partition wall portion 182 in the thickness direction. A relief valve 80 is mounted in the bypass hole 18a as shown by a two-dot chain line in the figure. Further, on the outer peripheral side of the bypass hole 18a, an arc-shaped first communication hole 18b constituting an oil passage 35 penetrating the outer peripheral side wall 183 of the partition wall portion 182 in the thickness direction is formed sequentially up to the outer frame portion 17. ing.

FIG. 40 is a view showing the second forming plate. The second forming plate 12 has a partition wall 222 that partitions between the second communication holes 23a and 23b at a position corresponding to the partition wall 182. On the inner peripheral edge side of the partition wall 222, a convex detour hole 22a through which engine oil flows is formed so as to penetrate the partition wall 222 in the thickness direction. The bypass hole 22a is open at a position corresponding to the bypass hole 18a, and communicates with the bypass hole 18a. Then, similarly to the bypass hole 18a, a relief valve 80 is mounted in the bypass hole 22a as shown by a two-dot chain line in the drawing. An arc-shaped first communication hole 22b penetrating the outer peripheral side wall 223 of the partition wall portion 222 in the thickness direction is formed sequentially on the outer peripheral side of the bypass hole 22a until reaching the outer frame portion 21. The first communication holes 22b are open at positions corresponding to the respective first communication holes 18b, and communicate with the respective first communication holes 18b.

FIG. 41 shows a fin plate. The fin plate 13 includes partition walls 182, 222
A partition wall portion 272 that partitions between the second communication holes 26a and 26b is formed at a position corresponding to. The partition wall 27
A convex bypass hole 27a through which the engine oil flows is formed in the inner peripheral edge side of 2 so as to penetrate the partition wall portion 272 in the thickness direction. The detour hole 27a is connected to the detour hole 18
a, 22a and open at a position corresponding to the detour hole 18
a, 22a. Then, a relief valve 80 is mounted in the bypass hole 27a as shown by a two-dot chain line in the same manner as the bypass holes 18a and 22a. An arc-shaped first communication hole 27b penetrating the outer peripheral side wall 273 of the partition wall portion 272 in the thickness direction is formed sequentially on the outer peripheral side of the bypass hole 27a until reaching the outer frame portion 25. Their first
The communication hole 27b is opened at a position corresponding to each of the first communication holes 18b and 22b.
22b. Here, the partition walls 182, 2
22 and 272 are laminated to form the partition tube portion 8.
11 is formed.

FIGS. 42 and 43 are views showing a relief valve. The relief valve 80 includes a cylindrical valve body 82, a valve body 83 slidably displaced in the valve body 82, a guide 84 for regulating the movement of the valve body 83, and a valve 84 for returning the valve body 83 to an initial position. Spring 85 and the like. The valve body 82 is made of a metal such as an aluminum alloy and is formed in a cylindrical shape. The valve body 82 has a circular inlet portion 82 a at a lower end portion fitted into the holding portion 4 f of the lower end bracket 4, and a bypass passage 8 of the heat exchange portion 7 on a side wall portion.
1 has a circular outlet portion 82b communicating with the first outlet portion. Further, a detour 82c that connects the inlet 82a and the outlet 82b is formed inside the valve body 82. The valve element 83 is
For example, it is made of a metal such as an aluminum alloy, and includes a disk portion 83a that opens and closes the inlet portion 82a, and a rod portion 83b extending upward from the disk portion 83a in the drawing. Guide 84
For example, it is made of a metal such as an aluminum alloy and is formed in a substantially tubular shape. The valve body 83 is held by an annular holding wall 86 attached to the inner peripheral side of the valve body 82 so that the valve body 83 is vertically displaced in the drawing. The rod portion 83b is guided in the axial direction. The upper end of the spring 85 is held by the guide 84, and the lower end of the spring is held by the disk portion 83 a of the valve body 83.
This is for setting the valve opening pressure of the valve element 83.

A method of assembling the relief valve to the oil cooler will be described with reference to FIGS. 36 to 38 and FIG. The upper end bracket 5 and the lower end bracket 4 are assembled at the upper and lower ends of a stacked body in which a plurality of joined bodies 8 having the fin plate 13 interposed between the first forming plate 11 and the second forming plate 12 are attached, for example, in a furnace. The oil cooler 1 is manufactured by joining the laminated bodies integrally by brazing or the like. After that, with the upper end of the relief valve 80 at the top, the oil cooler 1 is inserted through the lower end of the oil cooler 1, that is, through the inlet hole 4 f formed in the lower bracket 4.
The relief valve 80 is assembled to the oil cooler 1 by press-fitting until the lower end surface of the lower end bracket 4 and the lower end surface of the valve body 82 are located on the same plane.

As described above, since the relief valve 80 is assembled by press-fitting the holding portion 4f of the lower end bracket 4 after the oil cooler 1 is integrally brazed, the spring 85 is used when the oil cooler 1 is integrally brazed. It will not be annealed. Therefore, since the spring characteristic of the spring 85 does not change, there is no influence on the valve opening pressure of the valve element 83 set by the spring 85, and the valve element 83 opens at a predetermined valve opening pressure. Become.

The operation of the oil cooler 1 will be described with reference to FIGS. 36 to 43. The engine oil that lubricates the sliding portion of the engine 2 passes through an outlet passage 2 a formed in the engine 2 and reaches an inlet hole 82 a of the relief valve 80 press-fitted into the lower end bracket 4. At this time, the inlet hole 82a
In the case where the upward pressure in the figure is received by the disk portion 83a of the valve body 83 of the relief valve 80 and the pressure is smaller than the valve opening pressure set in advance by the spring 85,
As shown in FIG. 42, since the valve element 83 closes the inlet 82a, the engine oil does not flow into the bypass passage 81, and the plurality of inlet holes 4b formed in the lower bracket 4 The heat flows into the plurality of oil passages 35 of the heat exchange unit 7.

Conversely, when the pressure received by the disk portion 83a of the valve body 83 is greater than the valve opening pressure preset by the spring 85, as shown by the broken line in FIG. Opens the inlet portion 82a, and the bypass passage 81
Engine oil flows into the inside. At this time, the detour passage 8
Since the pressure loss of the plurality of oil passages 35 is significantly larger than that of one, most of the engine oil passes through the bypass passage 81 and flows out to the upper end bracket 5. For this reason,
When a pressure equal to or higher than the valve opening pressure set in advance by the spring 85 is applied to the oil cooler 1, the oil can pass not only in the plurality of oil passages 35 but also in the bypass passage 81. Load can be reduced. Thereby, the heat exchange portion 7 of the oil cooler 1
Can be prevented from being damaged. Each of the plurality of partition walls 18 is stacked to accommodate the relief valve 80.
The cooling water passage 36 can be partitioned by 2, 222, 272.

FIG. 44 is a view showing a twelfth embodiment of the present invention, and is a view showing a first forming plate. The first forming plate 11 is made of a metal such as an aluminum alloy, for example, and the radial dimension is reduced by using the arc-shaped portions 181 and 191 in the sixth row of the first embodiment as the outer frame portion 17. Is smaller than the first forming plate 11. The outer frame portion 17 is provided with a plurality of first communication holes 17c so as to penetrate the outer frame portion 17 in the thickness direction. These first
The communication hole 17c is formed on the outer peripheral side of the second communication hole 19c arranged on the outermost peripheral side. By forming the first forming plate 11 as described above, the outer frame 1
7 (for example, air containing a snow melting agent)
Alternatively, when the cooling water (for example, seawater in the case of the marine oil cooler 1) may corrode the material of the heat exchange portion of the oil cooler 1, the cooling water is provided adjacent to the inner peripheral side of the outer peripheral wall 171 of the outer frame 17. Communication hole 17c through which engine oil flows
Is formed, the influence of the cooling water on the outer peripheral wall 171 of the outer frame portion 17 is eliminated. For this reason, the outer peripheral wall 171 of the outer frame portion 17 is affected only by the atmosphere, so that occurrence of defects such as perforations due to corrosion is reduced. The second
The angles of the connecting walls of the forming plate 12 and the fin plate 13 may be similarly shifted.

[Modification] In this embodiment, the fin plate is interposed between the molding plates, but the fin plate may not be provided. The shape of the forming plate is not limited to this embodiment, and the shape may be freely changed. In this embodiment, the oil cooler and the oil filter are connected in the stacking direction of the joined body. However, the oil cooler and the oil filter may be connected in the surface direction of the joined body, or the oil cooler may be connected via an oil pipe or the like. And an oil filter may be connected.

In this embodiment, the present invention is applied to an oil cooler. However, the present invention is applied to other heat exchangers such as a water-refrigerant heat exchanger for heating or cooling a refrigerant using engine cooling water. Is also good. In this embodiment, four positioning grooves are formed on the inner periphery of the inner frame portion. However, as shown in FIG. 45, three positioning grooves 59b are formed on the inner periphery of the inner frame portion 59. Alternatively, two or less or five or more may be formed. Further, the positioning of the plate may be performed by one or more protrusions formed on the outer periphery of the tubular structure.

[0072]

【The invention's effect】

[Claim 1] According to the present invention, since no bent portion is formed on the flat plate, it is possible to form more flow passage tubes in the same volume, and it is possible to increase the heat exchange area of the flow passage tubes. it can. In addition, since no structure is formed in the direction in which the flow path pipe extends to obstruct the flow of the first heat medium, the flow velocity near the wall surface of the first heat medium can be increased. The efficiency of heat exchange with the medium can be improved. [Claim 21] According to the present invention, since no structure that inhibits the flow of the first heat medium is formed in the extension direction of the flow path pipe, the flow velocity near the wall surface of the first heat medium can be increased. The heat exchange efficiency between the first heat medium and the second heat medium can be improved.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an oil cooler according to a first embodiment.

FIG. 2 is a cross-sectional view illustrating a main part of a heat exchange unit according to the first embodiment.

FIG. 3 is an exploded view showing the joined body according to the first embodiment.

FIG. 4 is a plan view showing a first forming plate according to the first embodiment.

FIG. 5 is a plan view showing a second forming plate according to the first embodiment.

FIG. 6 is a plan view showing the fin plate according to the first embodiment.

FIG. 7 is a plan view showing an upper end plate according to the first embodiment.

FIG. 8 is a plan view showing a lower end plate according to the first embodiment.

FIG. 9 is a schematic view showing a flow direction of engine oil and cooling water according to the first embodiment.

FIG. 10 is a perspective view showing a flow direction of engine oil and cooling water in the heat exchange section according to the first embodiment.

FIG. 11 is a plan view showing a first forming plate according to a second embodiment.

FIG. 12 is a plan view showing a second forming plate according to a second embodiment.

FIG. 13 is a plan view showing a first forming plate according to a third embodiment.

FIG. 14 is a plan view showing a second forming plate according to a third embodiment.

FIG. 15 is a sectional view showing an oil cooler according to a fourth embodiment.

FIG. 16 is a plan view showing a first forming plate according to a fourth embodiment.

FIG. 17 is a plan view showing a second forming plate according to a fourth embodiment.

FIG. 18 is a plan view showing a fin plate according to a fourth embodiment.

FIG. 19 is a plan view showing a lower end bracket according to the fifth embodiment.

FIG. 20 is a sectional view taken along line AA of FIG. 19;

FIG. 21 is a sectional view showing a main part of a heat exchange unit according to a sixth embodiment.

FIG. 22 is a plan view showing a fin plate according to a sixth embodiment.

FIG. 23 is a perspective view showing a method of assembling the fin plate according to the sixth embodiment.

FIG. 24 is a sectional view showing a main part of a heat exchange unit according to a seventh embodiment.

FIG. 25 is a plan view showing a forming plate according to a seventh embodiment.

FIG. 26 is a sectional view showing a main part of a heat exchange unit according to an eighth embodiment.

FIG. 27 is an exploded view showing a joined body according to an eighth embodiment.

FIG. 28 is a plan view showing a first forming plate according to an eighth embodiment.

FIG. 29 is a plan view showing a second forming plate according to an eighth embodiment.

FIG. 30 is an exploded view showing a heat exchanger according to a ninth embodiment.

FIG. 31 is a perspective view showing a heat exchanger according to a ninth embodiment.

FIG. 32 is a plan view showing a heat exchanger according to a ninth embodiment.

FIG. 33 is a sectional view taken along line AA of FIG. 32;

34 is a cross-sectional view taken along ABCDAA of FIG. 32.

FIG. 35 is a plan view showing a first forming plate according to a tenth embodiment.

FIG. 36 is a sectional view showing an oil cooler according to an eleventh embodiment.

FIG. 37 is a plan view showing a lower end bracket according to the eleventh embodiment.

FIG. 38 is a sectional view taken along line BB of FIG. 40;

FIG. 39 is a plan view showing a first forming plate according to an eleventh embodiment.

FIG. 40 is a plan view showing a second forming plate according to the eleventh embodiment.

FIG. 41 is a plan view showing a fin plate according to an eleventh embodiment.

FIG. 42 is a sectional view showing a relief valve according to an eleventh embodiment.

FIG. 43 is a sectional view showing a relief valve according to an eleventh embodiment.

FIG. 44 is a plan view showing a first forming plate according to a twelfth embodiment.

FIG. 45 is a schematic view showing a modification of the positioning groove portion of the inner frame portion.

FIG. 46 is a cross-sectional view showing a heat exchange unit.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Oil cooler (heat exchanger) 7 Heat exchange part 8 Joined body 9 Housing 11 1st shaping | molding plate (flat plate) 12 2nd shaping plate (flat plate) 13 Fin plate (flat plate) 16, 20, 24 Inner frame part (Plate wall part) 17, 21, 25 Outer frame part (Plate wall part) 18, 19 First connection piece (Plate wall part) 22, 23 Second connection piece (Plate wall part) 26, 27 Connection piece (Plate wall part) 16a, 17a , 17b 1st communication hole 19a-19c 2nd communication hole 20a, 21a, 21b 1st communication hole 23a-23c 2nd communication hole 24a, 25a, 25b 1st communication hole (1st communication hole) 26a-26c 2nd communication Holes (second communication holes) 34 Channel pipes 36 Cooling water passages (flow passages) 181 and 191 Arc-shaped portions (plate wall portions) 221 and 231 Arc-shaped portions (plate wall portions) 261 and 271 Arc-shaped portions (plate wall portions)

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Yasutoshi Yamanaka 1-1-1, Showa-cho, Kariya-shi, Aichi Japan Inside Denso Co., Ltd. (56) References JP-A-62-233685 (JP, A) JP-A-62- 17594 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) F01M 5/00 F28D 9/00 F28F 3/00-3/14

Claims (21)

(57) [Claims] 1. A plurality of first communication holes penetrate in a plate thickness direction,
And a plurality of the first communication holes and a plate wall portion are disposed next to each other,
A plurality of flat plates having a plurality of second communication holes penetrated in the same direction as the first communication holes are stacked such that each first communication hole and each second communication hole communicate with each other in the stacking direction. Thereby, a plurality of flow pipes extending in the stacking direction by the stacked plate wall portions and through which the first heat medium flows are formed. The first heat medium and the flow pipes are formed around these flow pipes. A heat exchanger in which a flow passage through which a second heat medium that exchanges heat flows flows. 2. The flat plate plate has a substantially annular inner frame portion forming the plate wall portion on the inner peripheral edge side, and a substantially annular outer frame portion forming the plate wall portion on the outer peripheral edge side. The heat exchanger according to claim 1, wherein: 3. The substantially flat inner frame portion forming the plate wall portion on the inner peripheral edge side, the substantially annular outer frame portion forming the plate wall portion on the outer peripheral edge side, and the inner frame portion. 2. The heat exchanger according to claim 1, further comprising a fan-shaped portion that forms the plate wall portion between the heat exchanger and the outer frame portion. 3. 4. The plate wall portion is formed by arranging a plurality of flat circular arc-shaped portions radially from the inner frame portion to the outer frame portion. In the thickness direction, the first communication holes are formed one by one so as to be surrounded by the arc-shaped portion,
3. The device according to claim 2, wherein each of the second communication holes is formed between two adjacent arc-shaped portions.
Alternatively, the heat exchanger according to claim 3. 5. The heat exchanger according to claim 1, wherein the heat exchanger includes a first flat plate formed with a first connecting piece connecting the plurality of arc-shaped portions in a radial direction or a circumferential direction, and at a position different from the first connecting piece. A second connecting the plurality of arc-shaped portions in a radial direction or a circumferential direction;
5. A laminate in which a plurality of joined bodies obtained by joining a second flat plate formed with connecting pieces are laminated.
A heat exchanger according to item 1. 6. A plate plate located at the outermost side of the laminated body has both a communication hole communicating with each of the first communication holes and a through hole communicating with each of the second communication holes. The heat exchanger according to claim 5, wherein: 7. The heat exchange according to claim 5, wherein the outermost flat plate of the laminate has only a communication hole communicating with each of the first communication holes. vessel. 8. The heat exchanger according to claim 6, wherein a bracket for attaching the laminate to an attached portion is joined to one end surface of the laminate. 9. The heat exchanger according to claim 8, wherein the bracket has a closing portion that closes the through hole. 10. The laminate has one first communication hole formed in each of the arc-shaped portions on one side from a virtual line in a plane direction passing through a center point, and on the other side from the virtual line, 6. The flat plate according to claim 5, wherein a plurality of flat plates having a plurality of first communication holes formed in each of the arc-shaped portions are stacked such that a front surface and a back surface alternately face one side. Heat exchanger. 11. The laminated body is sandwiched and joined between the first flat plate and the second flat plate, and has a first communication hole at a position corresponding to each of the first communication holes. A fin plate which is formed and is provided adjacent to the plurality of communication holes via a plate wall portion and has second communication holes formed at positions corresponding to the respective second communication holes. A heat exchanger according to claim 5. 12. The fin plate has a substantially annular inner frame portion forming the plate wall portion on the inner peripheral edge side, and has a substantially annular outer frame portion forming the plate wall portion on the outer peripheral edge side. The heat exchanger according to claim 11, wherein: 13. The plate wall portion is formed by sequentially arranging flat circular arc-shaped portions radially in order from the inner frame portion to the outer frame portion. In the thickness direction, a plurality of the first communication holes are respectively formed so as to be surrounded by the arc portions, and the second communication holes are formed between two adjacent arc portions. 13. The heat exchanger according to claim 12, wherein the heat exchanger is a heat exchanger. 14. The fin plate further includes a connecting piece for connecting the plurality of plate wall portions in a radial direction or a circumferential direction at a position corresponding to the first connecting piece or the second connecting piece. The heat exchanger according to claim 11. 15. The heat exchanger according to claim 11, wherein the fin plate has an asymmetric shape on one side and the other side with respect to a virtual line in a plane direction passing through a center point. . 16. The heat exchanger according to claim 15, wherein a plurality of the fin plates are stacked such that a front surface and a back surface alternately face one side. 17. The heat exchanger according to claim 5, wherein the laminate is an oil cooler that cools engine oil by exchanging heat between engine oil and cooling water. 18. The flat plate plate is a substantially annular plate-like plate in which a plurality of flat arc-shaped portions constituting the plate wall portion are radially arranged in rows from the inner frame portion to the outer peripheral edge side. A plurality of inner peripheral side connecting wall portions radially connecting the inner frame portion and an inner peripheral arc-shaped portion formed on the inner frame portion side, and a plurality of these inner peripheral side connecting wall portions. An outer peripheral side connecting wall portion provided at a position shifted in angle and radially connecting the outer frame portion and an outer peripheral arc-shaped portion formed on the outer frame portion side. 3. The heat exchanger according to 2. 19. The laminated body is provided with a plurality of oil passages through which engine oil flows, a bypass passage for bypassing the engine oil from the plurality of oil passages, and the bypass passage. The heat exchanger according to claim 17, further comprising a relief valve that opens when the pressure of the inflowing engine oil rises above a predetermined pressure. 20. The flat plate, wherein the plurality of first plates are provided.
An aluminum alloy plate through which engine oil flows in the communication hole and cooling water flows in the plurality of second communication holes, wherein the first communication hole arranged on the outermost peripheral side of the plurality of first communication holes is 2. The heat exchanger according to claim 1, wherein the heat exchanger is formed outside a second communication hole arranged on the outermost peripheral side of the second communication hole. 3. 21. One first communication hole penetrates the island portion connected to the inner peripheral side of the annular outer frame portion via the connection piece in the thickness direction thereof, and is partitioned by the connection piece. A pair of flat plate plates, each having two second communication holes penetrating in the same direction as the first communication hole so as to surround the island-shaped portion,
The first heat medium passage extends in the stacking direction by the stacked island portions by laminating the communication holes and the second communication holes so as to communicate with each other in the stacking direction, and through which the first heat medium flows. And a second heat medium that exchanges heat with the first heat medium through the flow path pipe so as to sew each connecting piece and each island-shaped portion. (2) A heat exchanger in which a heat medium passage is formed.