JPH08233476A - Heat exchanger - Google Patents

Abstract

PURPOSE: To provide a heat exchanger in which the welding operation of another step of complicated argon welding is not required, the labor hour of the welding operation is omitted, and the inexpensive manufacture is facilitated, the liquid leakage of the exchanger is prevented and heat exchanging performance is improved and the pressure resistance can be increased in the exchanger in which first and second channels are alternately provided via the flat plate of aluminum brazing sheet. CONSTITUTION: The channel molding 5 of the second channel of a heat exchanger is made of an aluminum extruded material, and the upper ends 12a and the lower ends 12b of both the front and rear sidewalls 12 are bent to the insides. The ends of the bent upper ends 12a and the lower ends 12b are opposed, and the ends of the upper ends 12a and the lower ends 12b are connected by a brazing material melted from a flat plate 3 of aluminum brazing sheet in the case of simultaneously brazing at the time of manufacturing a heat exchanger.

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, an aftercooler, an intercooler, a radiator, etc.

[0002]

2. Description of the Related Art In recent years, aluminum plate / fin type heat exchangers have been widely used as heat exchangers for oil coolers and the like. This heat exchanger has a first
The flow passages and the second flow passages through which a fluid such as oil passes in a direction orthogonal to the flow passages are alternately arranged by being separated by a flat plate.

The applicant of the present invention has previously provided, as a heat exchanger of this type, a first flow path provided between flat plates opposed to each other with a predetermined interval, and between the left and right side edges of both flat plates. And the corrugated fins disposed in the middle of the left and right annular wall portions for holding the space, and the second flow paths are spaced apart from each other by a predetermined distance. An annular wall for holding both the left and right spaces of the first flow path, which are formed by flat plates facing each other, peripheral walls along the peripheral edges of both flat plates, and a heat transfer surface enlarging wall part provided inside the peripheral walls. There has been proposed a heat exchanger provided with a communication part inside the part which communicates vertically adjacent second flow paths with each other through the first flow path (see, for example, Japanese Utility Model Laid-Open No. 63-116781).

[0004]

However, in such a conventional heat exchanger, the annular wall portions for maintaining the header portions are formed on the flat plates facing each other of the first flow path by, for example, press forming. Since it is necessary to provide each of them, there is a problem that the molding work is very troublesome and the die cost at the time of press molding is very high, resulting in cost increase.

On the other hand, the peripheral wall of the second flow path and the heat transfer surface enlarging wall are made of an aluminum extruded shape material consisting of front and rear side walls and a plate-shaped wall, and the upper and lower end portions of the plate-shaped wall are cut. The upper and lower ends of the front and rear side walls are removed, respectively, and these upper and lower ends are bent inward, the tips of both ends are butted against each other, and are manufactured by joining by argon welding. Therefore, the welding work is very troublesome, time-consuming, and the manufacturing cost of the heat exchanger is high, and it has not been put to practical use.

An object of the present invention is to solve the above-mentioned problems of the prior art, and to mess up the abutting tips of the upper and lower end portions of the front and rear side walls of the aluminum extruded profile forming the flow passage forming body of the second flow passage. Since there is no need to join by a separate welding operation such as a simple argon welding, the labor of the welding operation can be saved, the heat exchanger can be manufactured easily and inexpensively, and liquid leakage may occur. The heat exchange performance can be improved, and the pressure resistance is excellent.
There is no need to press-form a flat plate to form the flow path,
Therefore, it is an object of the present invention to provide a heat exchanger which can save the labor and is easy to manufacture.

[0007]

In order to achieve the above-mentioned object, the present invention provides a heat exchanger provided with a first flow path (A) and a second flow path (B), wherein a second flow path is provided. (B) is a pair of left and right flat plates made of aluminum brazing sheet having fluid passage holes at both upper and lower ends, and a peripheral wall that is arranged between both flat plates and along the peripheral edge of both flat plates, and is provided inside this. And a flow passage forming body having a wall portion for enlarging the heat transfer surface, and the flow passage forming body of the second flow passage (B) has front and rear side walls having a required thickness and a heat transfer surface for connecting them. Using aluminum extruded shape material consisting of expansion wall part, the upper and lower ends of the heat transfer surface expansion wall part are cut and removed, and the upper and lower ends of both front and rear walls are bent inward. The tips are abutted against each other, and the peripheral walls are formed at the upper and lower ends of the flow path forming body. There is a void for communication inside, and the tips of the bent upper end and the bent lower end of the both front and rear walls of each flow path forming body are the above-mentioned aluminum brazing sheet flat plate and flow path forming. The gist of the heat exchanger is that it is formed by joining with a brazing material eluted from a flat plate during collective brazing after stacking the bodies.

[0008]

[Operation] In the above heat exchanger, especially the second flow path (B)
The flow path forming body of is made of an aluminum extruded shape material consisting of front and rear side walls having a required thickness and heat transfer surface enlarging wall portions connecting these, and upper and lower ends of the heat transfer surface enlarging wall portion. The upper and lower end portions of the front and rear side walls are left by cutting away the parts, and the tips of the upper and lower side wall ends and the side wall lower end parts are abutted against each other, and the inside of the peripheral wall is formed at the upper and lower end parts of the flow path forming body. When the members forming the heat exchanger are arranged in a superposed state and are joined to each other by collective brazing, there is an open space for communication, and the upper ends of the front and rear walls of each flow path forming body are bent. The ends of the parts and the bent lower end are made of aluminum brazing
Since it is joined by the brazing material eluted from the sheet flat plate, it is not necessary to perform the joining work in a separate process such as conventional argon welding, so that the labor of the welding work in a separate process can be omitted, The heat exchanger can be manufactured easily and inexpensively. In addition, since it is firmly joined by the brazing material, liquid leakage does not occur and the heat exchange performance is improved.

Further, since the upper and lower header portions are formed by the fluid passage holes at the upper and lower end portions of each flat plate, the fluid passage holes of the upper and lower spacers, and the upper and lower communication void portions of the flow path forming body, The heat exchanger has excellent pressure resistance.

[0010]

Embodiments of the present invention will now be described with reference to the drawings.

In this specification, the front and rear and the left and right are based on FIG. 1, the front means the front side of the drawing sheet in FIG. 1, the rear means the rear side, and the left means the left side and the right side of the drawing. Same as the right side.

1 to 8 show a first embodiment of the present invention.

1 to 3, the heat exchanger (1) according to the present invention is made of aluminum (including aluminum alloy), and has a first flow path (A) and a second flow path (B). It prepares alternately. Further, in this embodiment, the first flow path (A) through which the external air flows and the second flow path through which the oil to be heat-exchanged with the external air flows in the direction orthogonal to the first flow path (A). The oil cooler having (B1) and the compressed air to be discharged from the compressor and to exchange heat with the external air are first
It is integrally provided with an aftercooler having a second flow path (B2) flown in a direction orthogonal to the flow path (A).

The oil cooler portion and the aftercooler portion of the heat exchanger (1) are the block-shaped upper and lower spacers without a fluid passage hole in the common first passage (A) for external air between them. (8a) and (8a) are separated from each other, which will be described later.

First, twelve external air first flow paths (A) and twelve oil second flow paths (B1) from the left end of the heat exchanger (1).
Are arranged alternately and orthogonally to each other to form an oil cooler part, and subsequently to one common external air flow path.
Through (A), six compressed air second flow passages (B2) and six external air first flow passages (A) are arranged alternately and orthogonally to each other, and the aftercooler portion is It is configured.

First flow path (A) for external air of the heat exchanger (1)
As shown in FIG. 2 and FIG.
(4) Both left and right flat plates (3) and (3) made of double-sided aluminum brazing sheet having (4) and both flat plates (3) and (3) are arranged at the upper and lower end portions in the middle of both and the flat plates (3 ) (3) fluid passage hole
(4) A pair of spacers (8) and (8) each having fluid passage holes (9) and (9) communicating with (4), and a corrugated louver located between both spacers (8) and (8). Formed by the fins (10)

The front and rear ends of the first flow path for external air (A) are open, and the external air is circulated in the flow path (A) by forced air blowing by a fan or natural ventilation by running of a vehicle or the like. .

On the other hand, as shown in FIGS. 4 to 6, the second oil flow passage (B1) is provided on both the left and right sides of the aluminum brazing sheet having the fluid passage holes (4) and (4) at the upper and lower ends thereof. Flat plate
(3) It is arranged between (3) and both flat plates (3) (3) and both flat plates
(3) A flow passage forming body (5) comprising a peripheral wall (6) along the peripheral edge of (3) and a heat transfer surface enlarging wall portion (7) provided inside the peripheral wall (6).
It is formed by and.

This flow path forming body (5) is composed of front and rear side walls (12) (1
Aluminum extruded shape material (11) consisting of 2) and the wall portion (7) for enlarging the heat transfer surface in between is used as a material, and the upper and lower end portions of the wall portion (7) for enlarging the heat transfer surface are removed by cutting. The upper and lower ends (12a) and (12a) and the lower ends (12b and 12b) of the front and rear side walls (12) and (12) are left, respectively, and the upper and lower ends (12a) of the front and rear side walls (12) and (12) are left. (12
a) Comrades and lower ends (12b) (12b) are bent inward, and the upper ends (12a) (12a) of the side walls and the lower ends (12b) (12b) of the side walls after bending are joined to each other. The flow path forming body is made by butting.
Communication voids (14) and (14) are formed at both upper and lower ends of (5).

Here, both front and rear side walls of the flow path forming body (5)
(12) The upper ends (12a) and (12a) of the bent upper ends of (12) and the lower ends of the bent lower ends (12b) and (12b) of the upper and lower ends are made of aluminum, when the heat exchanger (1) described later is manufactured. It is joined by the brazing material eluted from the brazing sheet flat plate (3).

The flat plate (3) is attached to the oil cooler.
Fluid passage holes (4) and (4) at both upper and lower ends of the
(8) By the fluid passage holes (9) (9) of (8) and the upper and lower communication voids (14) (14) of the flow path forming body (5), both upper and lower header parts (2) (2)
Are formed (see FIG. 1).

In addition, the wall portion (7) for enlarging the heat transfer surface of the second oil passage (B1) has a large number of protrusions to the left and right due to the forming process of the plate-like connecting wall portion using a press or a forming roll. The arch-shaped protrusions (15) are formed so as to leave a flat portion of a predetermined width between the left and right protrusions (15), and the fluid passage holes (16) are formed so as to face all the arch-shaped protrusions (15). ) Is opened. The tip of each arch-shaped protrusion (15) is brought into contact with the flat plate (3).

In this embodiment, the positions of the leftward protrusions (15) and the rightward protrusions (15) of the front and rear adjacent protrusion rows are offset by one from each other, and the leftward protrusions (15) and the rightward protrusions (15) are shifted. The protrusions (15) are arranged so as to be adjacent to each other in the front-rear direction. Further, the longitudinal direction of each arch-shaped projection (15) coincides with the oil flow direction of the second flow path (B), and the wall surface of each arch-shaped projection (15) opposes the oil flow direction. .

Although not shown in the drawings, according to the present invention, a large number of arch-shaped projections (1) protruding left and right are formed by forming the plate-like connecting wall portion using the above-mentioned press or forming roll.
The second flow passage (B1) for oil having a wall portion (7) for enlarging the heat transfer surface such that 5) is formed without leaving a flat portion of a predetermined width between the left and right protrusions (15) The same applies to the heat exchanger (1) provided with.

The second passage (B2) in the aftercooler portion, through which the compressed air discharged from the compressor flows, has almost the same structure as the second passage for oil (B1),
As shown in FIGS. 7 and 8, fluid passage holes (4) are provided at both upper and lower ends.
Both left and right flat plates (3) and (3) made of aluminum brazing sheet having (4), and arranged in the middle of both flat plates (3) and (3) and along the periphery of both flat plates (3) and (3). The flow path forming body (5) includes a peripheral wall (6) and a heat transfer surface enlarging wall portion (7) provided inside the peripheral wall (6).

This flow path forming body (5) includes front and rear side walls (12) (1
Aluminum extruded shape material (11) consisting of 2) and the wall portion (7) for enlarging the heat transfer surface in between is used as a material, and the upper and lower end portions of the wall portion (7) for enlarging the heat transfer surface are removed by cutting. The upper and lower ends (12a) and (12a) and the lower ends (12b and 12b) of the front and rear side walls (12) and (12) are left, respectively, and the upper and lower ends (12a) of the front and rear side walls (12) and (12) are left. (12
a) Comrade and the lower end (12b) (12b) are respectively folded inward, the side wall upper end (12a) (12a) comrade and the side wall lower end (12b) (12b) comrade's tip after bending, Both front and rear walls (1
2) Cut at right angles to (12) and abut against each other.
(14) (14) is formed.

Here, the bent upper end portions (12a) (12a) and the bent lower end portions (12b) (12b) of the front and rear side walls (12) (12) of each flow path forming body (5) The tip is a heat exchanger (1) described later.
At the time of manufacturing, the aluminum brazing sheet flat plate (3) is joined by the brazing material eluted.

And, each flat plate is provided in the after cooler portion.
The fluid passage holes (4) and (4) at both upper and lower ends of (3), the fluid passage holes (9) and (9) of both upper and lower spacers (8) and (8), and the upper and lower sides of the flow path forming body (5). Both upper and lower header parts (2) due to communication voids (14) (14)
(2) is formed (see FIG. 1).

The oil cooler portion and the aftercooler portion are the common first passage for external air between them.
In (A), both block-shaped upper and lower spacers without fluid passage holes
(8a) and (8a) are arranged so that they are separated from each other.

By the way, the shape of the heat transfer surface enlarging wall portion (7) of the compressed air second flow path (B2) is the same as the oil second flow path (B1).
Is different from the case.

That is, the wall portion (7) for enlarging the heat transfer surface of the second passage (B2) for compressed air is integrally provided on the aluminum extruded shape member (11) and both front and rear wall portions (12) (12). ) And a cylindrical portion (17) having a substantially rhombic cross section in parallel with each other, the adjacent cylindrical portions (17) and (17) are connected to each other. Therefore, the second flow path (B2) for compressed air is the internal flow path of the parallel tubular parts (17),
In addition, it is provided with an external passage having a substantially triangular cross section surrounded by a concave portion between the outer surfaces of the adjacent tubular portions (17) and (17) and a flat plate (3) portion facing the concave portion.

As shown in the modified example of FIG. 9, a strip-shaped connecting portion (18) is provided between the adjacent cylindrical portions (17) and (17) of the heat transfer surface enlarging wall portion (7) to connect them. ) May be provided.
In this case, the second flow path for compressed air (B2) is a parallel tubular part.
Internal passage of (17), a concave portion between the outer surface of the adjacent tubular portion (17) (17) and the belt-like connecting portion (18), and a flat plate facing the concave portion.
(3) An external passage having a substantially triangular cross section surrounded by the portion is provided.

The heat exchanger (1) comprises a flat plate (3) made of aluminum brazing sheet, and upper and lower spacers (8).
(8) (8a) (8a) and corrugated fins (10), two kinds of flow path forming body (5), the left and right outer side plates (20) (20) Arranged in a polymerized state in order,
For example, it is manufactured by batch brazing by a vacuum brazing method. And at this time, the heat exchanger
Protruding upper and lower ends (12a) (12a) of both front and rear side walls (12) and (12) of the peripheral wall (6) of each flow path forming body (5) in the oil cooler part (1) and aftercooler part (5) The mating tips are joined by the brazing material eluted from the aluminum brazing sheet flat plate (3).

At the upper and lower ends of the left side plate (20) of the heat exchanger (1), there are an oil introducing pipe joint (21) and an oil discharging pipe leading to the upper and lower header parts (2) and (2) of the oil cooler part. Pipe fittings (22)
The upper and lower ends of the aftercooler part of the right side plate (20) are connected to the upper and lower header parts (2) and (2) and the compressed air introduction pipe joint (23) from the compressor and the compressed air are connected. The discharge pipe joints (24) are connected to each other.

In the above, the first one of the heat exchangers (1)
Air is forced to pass through the flow path (A) by forced ventilation by a fan or by natural ventilation caused by traveling of a vehicle or the like.

On the other hand, in the oil cooler portion of the heat exchanger (1), oil sent from a pump having a predetermined discharge pressure is connected to the left side plate (20) by an oil introducing pipe joint (21 ) To flow into the lower header (2),
Further, the oil hits the wall surface of the large number of arch-shaped protrusions (15) of the second oil flow passage (B1) from the front, is disturbed by the flow and goes around both sides of each protrusion (15), and the fluid passes through. The hole (16) moves from left to right or from right to left, and the flow is disturbed and moves in the flow path (B1) while being sufficiently agitated to reach the upper header part (2) and further oil. It is discharged to the outside through the discharge pipe joint (22). Therefore, the heat exchange efficiency is very good.

On the other hand, in the aftercooler portion of the heat exchanger (1), the compressed air sent from the compressor is fed to the right side plate (2
0) is introduced into the lower header portion (2) through the compressed air introduction pipe joint (23), and the compressed air is further transferred to the heat transfer surface of the compressed air second flow path (B2). Magnifying wall (7)
A large number of cross-sections of the substantially rhombic cylindrical portion (17) inside the passage and adjacent tubular portions (17) (17) in the outer passage of the substantially triangular cross-section between the comrades to move in parallel flow, the upper header It is discharged from the part (2) to the outside through the compressed air discharge pipe joint (24), and therefore the heat exchange efficiency is very excellent.

The heat exchanger (1) has the front and rear side walls (12) of the flow path forming body (5) when the members constituting the heat exchanger (1) are arranged in a superposed state and are joined to each other by collective brazing. (12)
The upper and lower ends (12a) and (12a) of the butt end are joined by brazing material eluted from the aluminum brazing sheet flat plate (3), so a separate joining process by conventional argon welding is performed. Therefore, the labor of the welding operation can be omitted, and the heat exchanger (1) can be manufactured easily and inexpensively. In addition, since it is firmly joined by the brazing material, liquid leakage does not occur and the heat exchange performance is improved.

Furthermore, the fluid passage holes (4) and (4) at both upper and lower ends of each flat plate (3) and the fluid passage holes (9) of both the upper and lower spacers (8) and (8).
(9) and the upper and lower communication voids (14) (14) of the flow path forming body (5)
The upper and lower header parts (2) and (2) are formed by and, and a large number of arch-shaped projections (15) are provided on the wall part (7) for enlarging the heat transfer surface of the second oil passage (B1). Left and right flat plates
(3) The second for compressed air, which is brought into contact with (3), respectively
Since the tips of the parallel cylindrical parts (17) provided on the heat transfer surface enlarging wall part (7) of the flow path (B2) are brought into contact with the left and right flat plates (3) and (3) respectively. The heat exchanger (1) has a very high pressure resistance and an excellent heat exchange performance.

In particular, in this embodiment, the block-shaped upper and lower spacers (8a) (8a) (8a) (8a) having no fluid passage holes are provided in the first passage (A) for external air between the oil cooler portion and the aftercooler portion. ) Is arranged, the pressure resistance of the heat exchanger (1) is further increased.

In the illustrated heat exchanger (1), the lengthwise direction of the arch-shaped projections (15) of each projection row coincides with the oil flow direction. As long as the effect and stirring effect are not impaired, the protrusions (1
Of course, 5) may be arranged in a state of being inclined at a required angle with respect to the direction of oil flow. Although the cross-sectional shape of the arch-shaped protrusion (15) is substantially V-shaped and substantially inverted V-shaped as shown in the drawing, it is not limited to this and may be substantially U-shaped and substantially inverted U-shaped.

FIG. 10 shows a second embodiment of the present invention. Here, the point different from the case of the first embodiment is that the heat exchanger (1) has a first flow path (A) through which external air flows.
And a second flow passage (B) through which oil flows alternately are used as an oil cooler alone, and a plurality of second flow passages (B) for oil are regarded as one unit The direction of the oil flow changes each time so that the oil moves in a meandering shape as a whole, and in the part where the flow direction of the second oil flow path (B) changes, the end wall of the flat plate (3) is changed. The point is that the part (3a) is closed and the fluid passage hole is not opened.

Here, the second flow path (B) through which the oil flows is
Similar to the second flow path (B1) for oil in the case of the first embodiment, the left and right flat plates (3) (3) (made of aluminum brazing sheet having the fluid passage holes (4) (4) at the upper and lower ends thereof, respectively. 3) and the flow path forming body (5) disposed in the middle of both flat plates (3) and (3), and the heat transfer surface expanding wall (7) of the flow path forming body (5) has A large number of arch-shaped protrusions (15) protruding left and right are provided.

Then, the flow path forming body of the second flow path (B)
Front and rear side walls (12) of the peripheral wall (6) of (5) (12)
2a) (12a) and the bent lower ends (12b) (12b) are cut diagonally when viewed from the side of the flat plate (3), and when the heat exchanger (1) is manufactured. In addition, the brazing material eluted from the flat plate (3) made of aluminum brazing sheet can be used to bond a wider bonding area.

The heat exchanger (1) of the second embodiment is used as an oil cooler, for example, for cooling engine oil, for cooling industrial machines, and for cooling oil in various hydraulic systems.

As shown in the modified example of FIG. 11, the tip ends of the bent upper end portions (12a) (12a) of the front and rear side walls (12) (12),
It is also possible that the tips of the bent lower end portions (12b) and (12b) are cut to half the thickness of each other and are connected by so-called interleaving, so that they can be joined with a wide joining area as well. .

FIG. 12 shows a third embodiment of the present invention. In this embodiment, as in the case of the second embodiment, the heat exchanger (1) is used as an oil cooler alone, and a plurality of second oil passages (B) are used as one unit. The flow direction of the oil changes every time, and the oil moves in a meandering shape as a whole. However, the difference from the case of the second embodiment is that the fluid passage hole is in the portion where the flow direction changes. A partition lid (25) made of an aluminum brazing sheet is attached to the spacer (8) on one side having (9).

The flow path forming body of the second flow path (B)
Front and rear side walls (12) of the peripheral wall (6) of (5) (12)
2a) (12a) and the bent lower end (12b) (12b) The tips of the two are joined by the brazing material eluted from the aluminum brazing sheet flat plate (3) during the production of the heat exchanger (1). The points of joining are the same as in the case of the first embodiment.

The partition lid (25) shown is a spacer.
It has the same outer dimensions as (8) and a shallow fitting protrusion (2
6) is provided, and this shallow fitting protrusion (26) is a spacer.
By being fitted into the holes (9) of (8), they can be combined without being displaced from each other. These spacers
The partition lid (25) and the partition lid (25) are joined together by collective brazing, for example, by the vacuum brazing method, so that the partition lid (25) has a brazing material layer on the surface on the spacer (8) side. It may be made of a brazing sheet, but the partition lid (25) may be made of a double-sided brazing sheet.

In order to absorb the thickness of the partition lid (25), for example, the thickness of the spacer (8) fitted to the partition lid (25) is set to be smaller than the thickness of the spacers (8) in other parts. It is preferable to reduce the thickness by the thickness. Alternatively, the spacer
A recess (not shown) for fitting the peripheral edge of the partition lid (25) is provided on one side of (8), and the partition lid (2
The form of 5) may be entirely fitted.

According to the third embodiment described above, since the partition wall in the portion where the flow direction of the heat exchanger (1) changes can be formed with the minimum shape, the weight can be reduced and the material cost can be reduced. In addition, attach the shallow fitting protrusions (26) of the partition lid (25) to the spacer.
It fits in the hole (9) of (8), so it is easy to set,
In addition, there is no concern about misalignment or disconnection after setting.

Furthermore, the shallow fitting convex portion (26) of the partition lid (25)
Since it is joined while it is fitted in the hole (9) of the spacer (8), not only on the outer surface of the spacer (8) but also on the inner peripheral surface of the hole (9), the aluminum brazing sheet partition The brazing filler metal eluted from the lid (25) joins the partition lid (25) and the spacer (8) to each other, resulting in a very strong joint, no risk of liquid leakage, and the advantage of not producing defective products. There is.

FIG. 13 shows a fourth embodiment of the present invention. In this embodiment, the heat exchanger (1) is used as an aftercooler alone, and the compressed air discharged from the compressor moves through the inside of the second flow path (B). And the wall portion (7) for enlarging the heat transfer surface of the second flow path (B)
Is a plate-shaped horizontal wall (2 with parallel fins (28) on both upper and lower sides.
It is composed of 7).

As in the case of the first embodiment, in the fourth embodiment, the flow path forming member (5) of the second flow path (B) is formed.
Front and rear side walls (12) of the peripheral wall (6) Bend upper end (12a) of (12)
(12a) Comb and bent lower end (12b) (12b) The tips of the comrades are joined by brazing filler metal eluted from the aluminum brazing sheet flat plate (3) during the production of the heat exchanger (1). It is something.

Since the other points of the second to fourth embodiments are the same as those of the first embodiment, the same components are designated by the same reference numerals in the drawings.

The numbers of the first flow path (A) and the second flow path (B) of the heat exchanger (1) in the above embodiment are merely examples,
The number of flow paths (A) and (B) is set depending on the size of the heat exchanger (1) and the heat exchange performance.

Further, the heat exchanger (1) of each of the above embodiments is the second
The heat exchanger (1) is used as a so-called vertical heat exchanger with the flow passage (B) arranged vertically, but the heat exchanger (1) is a horizontal heat exchanger with the second flow passage (B) arranged horizontally. Sometimes used as.

In the heat exchanger (1) of the above embodiment, the first
Although the flow path (A) and the second flow path (B) are arranged orthogonally to each other, the flow paths (A) and (B) may be arranged in parallel with each other.

Then, in this case, the two kinds of fluids in both the flow paths (A) and (B) are made to flow so as to be in parallel flow with each other or to be in countercurrent with each other.

Further, the heat exchanger (1) of the first embodiment described above.
Has two functions of an oil cooler and an aftercooler, and the heat exchanger (1) of the second and third embodiments has the same function as an oil cooler and the heat exchanger of the fourth embodiment. The heat exchangers (1) of the present invention are combined with other oil coolers, aftercoolers, intercoolers, radiators, etc. The present invention is similarly applied as various heat exchangers configured independently and exchanging heat of two or three kinds of gas and fluid.

[0061]

As described above, in the heat exchanger according to the present invention, the flow passage forming body of the second flow passage (B) is used for enlarging the heat transfer surface for connecting both front and rear side walls having a required thickness. Using the extruded aluminum shape material consisting of the wall part as a material, the upper and lower end parts of the wall part for expanding the heat transfer surface are removed by cutting, and the upper and lower end parts of both front and rear walls are left respectively, and the upper end part of the side wall after bending The tips of the same and the lower end of the side wall are butted against each other, and a communication void is formed inside the peripheral wall at both upper and lower ends of the flow path forming body, and members constituting the heat exchanger are arranged in a superposed state. When joining together by collective brazing, the tips of the bent upper end and the bent lower end of both the front and rear walls of the flow path forming body are made of aluminum.
Since it is joined by the brazing material eluted from the brazing sheet flat plate, there is no need to perform the joining work in a separate process such as conventional argon welding, and therefore the labor of the welding work in a separate process can be omitted. Thus, the heat exchanger can be manufactured easily and inexpensively. In addition, since it is firmly joined by the brazing material, liquid leakage does not occur and the heat exchange performance is improved.

Further, since the upper and lower header portions are formed by the fluid passage holes at the upper and lower end portions of each flat plate, the fluid passage holes of the upper and lower spacers, and the upper and lower communication void portions of the flow path forming body, The heat exchanger has excellent pressure resistance.

Further, a pair of upper and lower spacers having a fluid passage hole in the middle of the left and right flat plates made of an aluminum brazing sheet in the first flow path (A) of the heat exchanger, and a corrugate between the both spacers. If the fins are arranged, it is not necessary to press-form a flat plate as in the conventional case to provide an annular wall portion for maintaining a gap for forming a header portion,
Therefore, the labor can be omitted, the heat exchanger can be easily manufactured, and it is particularly effective for manufacturing the heat exchanger having a small number of lots.

[Brief description of drawings]

FIG. 1 is a schematic front view of a heat exchanger according to a first embodiment of the present invention.

FIG. 2 is an enlarged perspective view of a partial cutaway main portion showing a flow path configuration of an oil cooler portion and an aftercooler portion of the heat exchanger of FIG.

FIG. 3 is an exploded perspective view of components of an oil cooler portion and an aftercooler portion of the heat exchanger of FIG.

FIG. 4 is a partially omitted left side view of a flow passage forming body used in an oil cooler portion of the heat exchanger of FIG.

FIG. 5 is a partially omitted front view of the same flow path forming body.

FIG. 6 is an enlarged perspective view of a main part of a wall portion for enlarging a heat transfer surface of the flow path forming body.

7 is a partially omitted left side view of the flow path forming body used in the aftercooler portion of the heat exchanger of FIG.

8 is an enlarged cross-sectional view of a main part of an aftercooler portion of the heat exchanger of FIG.

FIG. 9 is an enlarged sectional view of an essential part of the aftercooler portion, showing a modified example of the wall portion for enlarging the heat transfer surface of the flow path forming member.

FIG. 10 is an exploded perspective view of constituent members of a heat exchanger according to a second embodiment of the present invention.

FIG. 11 is a partially omitted left side view showing a modified example of the flow path forming member of the heat exchanger.

FIG. 12 is an exploded partial perspective view of components of the heat exchanger of the third embodiment of the present invention.

FIG. 13 is a partially cutaway enlarged perspective view showing a flow path configuration of a heat exchanger according to a fourth embodiment of the present invention.

[Explanation of symbols]

A First flow path for external air B Second flow path B1 Second flow path for oil B2 Second flow path for compressed air 1 Heat exchanger 2 Header part 3 Flat plate made of aluminum brazing sheet 4 Fluid passage hole 5 Flow path Forming body 6 Peripheral wall 7 Wall part for expanding heat transfer surface 8 Spacer 9 Fluid passage hole 10 Corrugated fins 12, 12 Both front and rear side walls 12a Upper end 12b Lower end 14 Communication void

Claims (1)

[Claims] 1. A heat exchanger having a first flow path (A) and a second flow path (B), wherein the second flow path (B) has fluid passage holes (4) (4) at both upper and lower ends. Left and right flat plates (3) (3) made of an aluminum brazing sheet, and a peripheral wall arranged between both flat plates (3) (3) and along the periphery of both flat plates (3) (3). (6) and the flow path forming body (5) provided with the wall portion (7) for enlarging the heat transfer surface provided inside the flow path forming body (5) of the second flow path (B). ) Is the front and rear wall (12) with the required thickness
Using the aluminum extruded shape material consisting of (12) and the heat transfer surface enlarging wall part (7) connecting these, the upper and lower end parts of the heat transfer surface enlarging wall part (7) are cut and removed, Upper and lower ends (12a) (12a) of both front and rear walls (12) (12) Comrade and lower end (12b)
(12b) Each of them is bent inward, the tips are abutted against each other, and communication voids (14) and (14) are opened inside the peripheral wall (6) at both upper and lower ends of the flow path forming body (5). The upper and lower ends (12a) (12a) of the front and rear side walls (12) and (12) of each flow path forming body (5) and the bent lower ends (12b) and (12b)
The tips of the two are joined by brazing material eluted from the flat plate (3) during collective brazing after stacking the flat plate (3) made of aluminum brazing sheet and the flow path forming body (5). A heat exchanger characterized by being present.