JP2884201B2 - 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, an intercooler, an aftercooler, a radiator, and the like.

[0002]

2. Description of the Related Art As a heat exchanger of this type, the present applicant has
First, the first flow path through which the heat exchange first fluid flows and the second flow path through which the heat exchange second fluid to be heat-exchanged with the first fluid flow are alternately arranged in a stacked manner. Type heat exchanger was proposed (see Japanese Patent Application Laid-Open No. 63-197986).

In the heat exchanger proposed above, the first flow path is formed by flat plates facing each other at a predetermined interval and a first fluid flow path forming body interposed between the flat plates. , The second flow path includes flat plates facing each other at a predetermined distance from each other, a pair of side walls for maintaining the distance interposed between the flat plates, and a fin positioned at an intermediate position between the two side wall portions. It was formed by members.

[0004] Conventionally, the first fluid flow path forming body has
It has a pair of side walls for maintaining spacing arranged so as to correspond to the right and left side edges of the flat plate, and a large number of substantially rhombic cylindrical sections having a cross section parallel to the both side walls, and both upper and lower outer surfaces are substantially cross-sections respectively. It was made of an extruded aluminum profile consisting of a corrugated hollow connecting wall.

[0005]

However, in the heat exchanger proposed above, the cross-sectional area of the hollow channel portion in each cylindrical portion of the first fluid channel forming member is smaller than that of the first fluid channel forming member. The cross-sectional area of the substantially triangular flow path portion surrounded by the corrugated concave portions on both the upper and lower outer surfaces and the flat plate portion facing the concave portion is considerably smaller, and therefore, the resistance of the triangular flow channel portion is smaller than that of the other. Since the flow rate is lower than the resistance of the hollow flow path in the cylindrical part, the flow velocity decreases and the equivalent diameter is small, so the Reynolds number decreases as the flow velocity decreases and the performance is not efficiently extracted. there were.

[0006] In the conventional heat exchanger, since the thickness of the connecting portion of the cylindrical portions of the first fluid flow path forming body is larger than the thickness of the other portions, the first fluid flow path is formed. If the formed body is warped in the width direction due to extrusion molding, it is difficult to correct the warpage, and there is a problem that unbonded defects in brazing bonding are likely to occur during the manufacture of the heat exchanger. In addition, since the thickness of the connecting portion between the cylindrical portions of the first fluid flow path forming body is large, there is a problem that the pitch of the cylindrical portions is narrow and the weight is heavy.

An object of the present invention is to solve the above problems,
The cross-sectional area of the substantially triangular cross section surrounded by the corrugated concave portions on the upper and lower outer surfaces of the first fluid flow path forming body and the flat plate portion opposed to the concave portion can be increased. The cross-sectional area of the flow path portion can be the same as or close to the cross-sectional area of the hollow flow path portion in each tubular portion of the flow path forming body, whereby the performance can be efficiently derived. Along with the first extruded aluminum
Even when the fluid flow path forming body is warped in the width direction due to extrusion, the correction can be easily performed, and the occurrence of unbonded defects in brazing bonding can be prevented. It is an object of the present invention to provide a heat exchanger that can increase the pitch of a cylindrical portion of a fluid flow path forming body and can achieve weight reduction.

[0008]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides at least one first flow path through which a first heat exchange fluid flows, and a heat exchange to be exchanged with the first fluid. At least one second flow path through which the second fluid flows, wherein the first flow paths face each other at a predetermined interval from each other, and the first fluid flow interposed between these flat plates The second flow path is formed by the road forming body, and the second flow path is disposed so as to be opposed to each other at a predetermined interval from each other, and disposed between the flat plates so as to correspond to the left, right, front and rear side edges of the flat plate. In the heat exchanger formed by the pair of spaced-apart holding side walls and the fin member positioned between the side walls, the first fluid flow path forming body is formed on the left and right side edges of the flat plate. A pair of spacings arranged to correspond to A side wall portion and a hollow connecting wall portion formed by a number of tubular portions parallel to both side wall portions and a horizontal connecting portion connecting adjacent tubular portions and having upper and lower outer surfaces each having a substantially corrugated cross section. A cross section of a substantially triangular cross section flow path portion formed by an aluminum extruded material and surrounded by the concave portions on the upper and lower outer surfaces of the hollow connecting wall portion and the flat portions facing the concave portions. The gist of the present invention is a heat exchanger whose area is equal to or close to the cross-sectional area of the hollow flow path portion inside each cylindrical portion.

[0009]

According to the heat exchanger, at the hollow connecting wall of the first fluid flow path forming body made of the aluminum hollow extruded die,
Since the horizontal connecting portions for connecting these are provided between adjacent tubular portions, each concave portion on the upper and lower outer surfaces of the hollow connecting wall portion has a substantially waveform cross section, and a flat plate portion facing each concave portion. The cross-sectional area of the substantially triangular flow path portion formed by being surrounded by the flow path can be enlarged, and the cross-sectional area of the triangular flow path portion can be increased by the hollow flow in each cylindrical portion of the flow path forming body. The cross-sectional area of the channel portion can be the same as or close to the cross-sectional portion, whereby the resistance of the triangular channel portion can be reduced, and the flow rate of the fluid can be reduced without decreasing the flow velocity. As a result, pressure loss is small and heat exchange performance can be efficiently derived.

[0010] Even when the first fluid flow path forming body is warped in the width direction during extrusion molding, the hollow connecting wall portion of the first fluid flow path forming body is formed by the adjacent cylindrical portions. Since the horizontal connecting portion is thin, the correction can be easily performed, and the occurrence of unbonded defects in brazing bonding can be prevented.

[0011]

Next, an embodiment of the present invention will be described with reference to the drawings.

The embodiment shows a case where the heat exchanger of the present invention is applied to an oil cooler.

In this specification, front and rear and left and right are based on FIG. 1, the front is the front side of the drawing sheet of FIG. 1, the rear is the same back side, the left is the left side of the drawing, and the right is the left side. It means the right side.

Embodiment 1 In FIGS. 1 and 2 showing a first embodiment of the present invention, an oil cooler (1) according to the present invention has a plurality of first flow paths (A) through which oil flows as a first heat exchange fluid. ) And a plurality of second flow paths (B) through which cooling air flows as a heat exchange second fluid to be heat-exchanged with the first fluid.

A number of first flow paths (A) through which the oil flows,
Flat plates (2) and (2) made of aluminum brazing sheets facing each other at a predetermined interval, and these flat plates
(2) and (2) a first fluid flow path forming body (3) interposed between the two.

On the other hand, the second flow path (B) is composed of flat plates (2) and (2) facing each other at a predetermined interval, and a flat plate (2) and a flat plate (2) interposed between the flat plates (2) and (2). 2) A pair of side walls (10) (10) made of a pair of extruded aluminum members arranged so as to correspond to the front and rear side edges of (2), and both side walls (10) (10) Intermediate louvered corrugated fins (11)
And is formed by.

The first fluid flow path forming body (3) communicates with a pair of spacing side walls (5) (5) arranged corresponding to the left and right side edges of the flat plate (2). Hollow connecting wall (4)
It is made of an extruded aluminum material consisting of: The hollow connecting wall (4) is composed of a large number of cylindrical sections (6) having a substantially rhombic cross section parallel to the left and right side walls (5) (5) and adjacent cylindrical sections (6) (6). The upper and lower outer surfaces are substantially corrugated in cross section. In this embodiment, each horizontal connecting portion (7) has substantially the same width and thickness as each of the crests (4a) on the upper and lower outer surfaces of the hollow connecting wall portion (4) having a substantially wavy cross section.

The horizontal connecting portion (7) is, for example, 0.5 to
It preferably has a width of about 3 mm and a thickness of about 0.5 to 1.5 mm.

The left or right space holding side wall (5) of the first fluid flow path forming body (3) and the same side edge of the hollow connecting wall (4) are connected to a thick connecting part. Consolidated by (9).

The existence of the above-mentioned horizontal connecting portion (7) between adjacent tubular portions (6) and (6) allows the upper and lower outer surfaces of the hollow connecting wall portion (4) to have a substantially corrugated cross section. Each concave part (8),
The cross-sectional area (S2) of the substantially triangular cross-sectional flow path portion (A2) formed by being surrounded by the flat plate portion (2a) facing each concave portion (8)
The cross-sectional area (S2) of the triangular flow path portion (A2) can be enlarged, and the hollow flow path portion (A1) in each cylindrical portion (6) of the flow path forming body (3) can be enlarged. ) Can be the same as or close to the cross-sectional area (S1) of the triangular channel portion (A
The resistance of 2) can be reduced, and the flow of the fluid becomes uniform as a whole of the first flow path (A) without decreasing the flow velocity.

Further, since the thin horizontal connecting portion (7) is provided on the hollow connecting wall portion (4) of the first fluid flow path forming body (3), the first fluid flow path forming body (3) is provided. Even if a warp occurs in the width direction during extrusion molding, it can be easily corrected, and unbonded defects in brazing bonding can be prevented. Further, the pitch of the tubular portion (6) of the first fluid flow path forming body (3) can be widened by the presence of the horizontal connecting portion (7), so that the weight can be reduced.

In the oil cooler (1) according to the present invention, at least three flat plates (2) are used. Therefore, the smallest oil cooler (1) is theoretically
(A) and one second flow path (B). Actually, the oil cooler (1) has 1 to 20 first flow paths (A),
And 1 to 20 second flow paths (B), and the first flow path
(A) and the second flow path (B) are alternately arranged.

The number of such flow paths (A) and (B) is merely an example, and the number of both flow paths (A) and (B) is set according to the size of the oil cooler (1) and the heat exchange performance. You. The second flow path
The fin member (11) in (B) is not limited to a corrugated fin, but may be constituted by fins of other shapes.

Embodiment 2 FIG. 3 shows a second embodiment of the present invention.

Here, the difference from the first embodiment is that the shape of each horizontal connecting portion (7) in the hollow connecting wall (4) of the first fluid flow path forming body (3) is different from that of the first embodiment. The point is that the wall (4) has a width that is considerably narrower than each of the wave fronts (4a) on the upper and lower outer surfaces of the substantially corrugated cross section, and is considerably thinner.

Embodiment 3 FIG. 4 shows a third embodiment of the present invention.

Here, the difference from the first embodiment is that horizontal connection is made on the left and right sides of the cylindrical portion (6) of the hollow connection wall (4) of the first fluid flow path forming body (3). The point is that vertical walls (6a) and (6a) are provided in a portion connected to the portion (7). The shape of each horizontal connecting portion (7) is almost the same as that of the first embodiment.

The other points of the second embodiment and the third embodiment are the same as those of the first embodiment, and the same components are denoted by the same reference numerals in the drawings.

In the oil cooler (1) of the above embodiment, the first flow path (A) and the second flow path (B) are arranged orthogonally. ) May be arranged in parallel with each other. And in this case, two channels in both flow paths (A) and (B)
The seed fluids are transferred so that they are parallel to each other or countercurrent to each other.

Although the heat exchanger of the above embodiment is used as an oil cooler, the heat exchanger of the present invention can be used as a heat exchanger of two types of fluids such as an intercooler, an aftercooler, and a radiator. The present invention can be similarly applied to various types of heat exchangers that perform exchange.

[0031]

According to the present invention, as described above, the first heat exchange
At least one first flow path through which the fluid flows, and at least one second flow path through which the heat exchange second fluid to be heat-exchanged with the first fluid flows, wherein the first flow paths are mutually connected. Formed by flat plates facing each other at a predetermined interval, and a first fluid flow path forming body interposed between the flat plates;
A second flow path, a flat plate facing each other at a predetermined interval,
Formed by a pair of spaced-apart side walls and a fin member positioned between the two side walls, which are interposed between the flat plates and arranged to correspond to the left and right or front and rear side edges of the flat plate. In the heat exchanger described above, the first fluid flow path forming body is made of an extruded aluminum material having a pair of a spacing side wall portion and a hollow connecting wall portion, and the adjacent tubular portions of the hollow connecting wall portion. Since there is a horizontal connecting part connecting these between comrades,
Each concave portion on the upper and lower outer surfaces of the cross-section of the hollow connecting wall portion having a substantially waveform,
The cross-sectional area of the substantially triangular cross-sectional flow path portion formed by being surrounded by the flat plate portion facing each concave portion can be enlarged, and the cross-sectional area of the triangular flow path portion can be increased by The cross-sectional area of the hollow flow passage portion in each cylindrical portion can be the same as or close to the cross-sectional area, whereby the resistance of the triangular flow passage portion can be reduced, and the fluid velocity does not decrease. Flow is made uniform throughout the first flow path, pressure loss is small, and heat exchange performance can be efficiently derived. Further, even when the first fluid flow path forming body made of an extruded aluminum material is warped in the width direction due to extrusion, the hollow connecting wall portion of the first fluid flow path forming body is located between adjacent tubular portions. Since the horizontal connecting portion is thin, it can be easily corrected, and the occurrence of unbonded defects in brazing bonding can be prevented.

Further, since the horizontal connecting portions are provided between adjacent cylindrical portions to connect them, the pitch of the cylindrical portions of the first fluid flow path forming body can be widened, and therefore the weight can be reduced. This has the effect of realizing the conversion.

[Brief description of the drawings]

FIG. 1 is a front view of a main part of an oil cooler according to a first embodiment.

FIG. 2 is an exploded perspective view of the main part.

FIG. 3 is a front view of a main part of an oil cooler according to a second embodiment.

FIG. 4 is a front view of a main part of an oil cooler according to a third embodiment.

[Explanation of symbols]

 A first fluid flow path A1 hollow flow path part A2 substantially triangular cross-section flow path part B second fluid flow path S1 cross-sectional area S2 cross-sectional area 1 oil cooler (heat exchanger) 2 flat plate 2a flat plate portion 3 first fluid flow Road forming body 4 Hollow connecting wall portion 5 Interval holding side wall portion 6 Cylindrical portion 7 Horizontal connecting portion 8 Corrugated concave portion 10 Interval holding side wall portion 11 Fin member

Claims (1)

(57) [Claims] At least one through which a heat exchange first fluid is flowed
A first flow path (A), and at least one second flow path (B) through which a heat exchange second fluid to be heat-exchanged with the first fluid flows. Are formed by flat plates (2) and (2) facing each other at a predetermined interval from each other and a first fluid flow path forming body (3) interposed between these flat plates (2) and (2). A second channel (B) is provided between the flat plates (2) and (2) opposed to each other at a predetermined interval, and the flat plates (2) and (2) are interposed between the flat plates (2) and (2). A pair of spacing side walls (10) (10) and fin members (11) positioned in the middle between the pair of side walls (10) (10) and the side walls (10) (10) arranged to correspond to the left and right or front and rear side edges of ) And the heat exchanger formed by
The first fluid flow path forming body (3) is a pair of side walls for maintaining the distance arranged so as to correspond to left and right side edges of the flat plate (2).
(5) (5), a large number of cylindrical parts (6) parallel to both side walls (5) (5) and horizontal connecting parts connecting adjacent cylindrical parts (6) (6)
The upper and lower outer surfaces of the hollow connecting wall (4) are made of an aluminum extruded material having a hollow connecting wall (4) having a substantially corrugated cross section. The cross-sectional area (S2) of the substantially triangular cross-section flow path portion (A2) formed by being surrounded by each concave portion (8) and the flat plate portion (2a) facing each concave portion (8) is hollow. A heat exchanger having a cross-sectional area (S1) that is the same as or close to the cross-sectional area (S1) of the hollow channel portion (A1) inside each tubular portion (6) of the connecting wall portion (4).