JPH0670557B2 - Heat exchanger - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a heat exchanger used in, for example, an intercooler (intercooler for air supply).

2. Description of the Related Art As a heat exchanger of this type, the present applicant has previously proposed that at least one first flow path through which a heat exchange first fluid flows and a heat exchange second fluid to be heat-exchanged with the first fluid. A heat exchanger provided with at least one second flow path through which water is flowed has been proposed (see Japanese Utility Model Laid-Open No. 63-197986).

In the previously proposed heat exchanger, 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 is a flat plate facing each other with a predetermined gap,
Formed by a pair of side-walls for spacing and a fin member located in the middle of both side walls arranged between the flat plates and corresponding to the left and right or front and rear side edges of the flat plates. It had been.

Then, conventionally, the first fluid flow path forming member connects the pair of space holding side wall portions arranged so as to correspond to the left and right side edge portions of the flat plate and the both side wall portions to each other, and the side wall portion is provided inside. Made of an extruded aluminum material having a hollow connecting wall part having a plurality of hollow parts parallel to each other and at least one of the upper and lower surfaces having a corrugated cross section, and the top surface of the wave head of the hollow connecting wall part is a flat plate. Was joined to.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention However, in the previously proposed heat exchanger, compared with the cross-sectional area of the hollow portion having the substantially rhombic cross section inside the first fluid flow path forming body made of the aluminum hollow extrusion mold material, The cross-sectional area of the corrugated concave portions on the upper and lower outer sides of the path forming body and the hollow portion having a substantially triangular cross section surrounded by the flat plate portions facing the concave portions is considerably smaller, and therefore the fluid flowing in both hollow portions is smaller. The flow rate and flow velocity of
When the flow is non-uniform and the pressure loss is large, especially when applied to an intercooler, high-temperature and high-pressure air flows at a high speed in the flow path, resulting in a large pressure loss and poor heat exchange performance.

An object of the present invention is to solve the above problems and to provide a cross-sectional area of all hollow parts in a first flow path formed by upper and lower flat plates and a first fluid flow path forming body interposed therebetween. Are almost equal, and therefore the flow rate and flow velocity of the fluid flowing in the hollow portion are equal, the fluid flow is uniform, and the pressure loss is very small. For example, when applied to an intercooler, It is an object of the present invention to provide a heat exchanger in which the pressure loss is very small and the heat exchange performance is improved even when high temperature and high pressure air flows at high speed.

Means for Solving the Problems In order to achieve the above object, the present invention provides a heat exchange first
At least one first flow path through which a fluid flows and at least one second flow path through which a heat exchange second fluid that is to be heat-exchanged with the first fluid flow are provided, and the first flow paths are mutually 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 and a flat plate facing each other at a predetermined interval;
Formed by a pair of side-walls for spacing and a fin member located in the middle of both side walls arranged between the flat plates and corresponding to the left and right or front and rear side edges of the flat plates. In the heat exchanger described above, the first fluid flow path forming member includes a pair of side wall portions for holding a gap, which are arranged so as to correspond to the left and right side edges of the flat plate,
These side wall parts are connected to each other, and a large number of hollow parts parallel to the side wall parts are provided inside, and the upper and lower outer surfaces are each corrugated in cross section, and the corrugated head extends upward or downward at a required height. Made of extruded aluminum material consisting of a hollow connecting wall with convex portions, the cross-sectional area of the hollow inside the hollow connecting wall, the corrugated concaves on the upper and lower outer surfaces of the hollow connecting wall, and the protrusions on both sides of this. The gist of the heat exchanger is that the cross section area of the hollow portion surrounded by the flat portion facing the concave portion and the concave portion is substantially equal.

Action According to the heat exchanger, the cross-sectional area of the hollow portion inside the hollow connecting wall portion originally provided in the aluminum hollow extrusion molding material forming the first fluid flow path forming member, and the upper and lower portions of the hollow connecting wall portion Since the cross-sectional area of the outer corrugated concave portion, the convex portions on both sides of the corrugated concave portion, and the hollow portion surrounded by the flat plate portions facing the concave portion are substantially equal to each other, all the hollows in the first flow path. The cross-sectional areas of the parts are substantially equal. Therefore, the flow rate and the flow velocity of the fluid flowing in the hollow part become equal,
The flow of fluid becomes uniform.

In addition, since the cross-sectional areas of all hollow parts in the first flow path are substantially equal, the pressure loss is very small. For example, when a heat exchanger is applied to an intercooler, high-temperature and high-pressure air flows in the flow path at high speed. Even if it flows, the pressure loss is very small and the heat exchange performance is improved.

In addition, the shape of the convex portion provided on the corrugated head on both the outer surfaces of the corrugated section of the hollow connection wall portion of the first fluid flow path forming member is, for example, a dovetail cross section, that is, If the flat top surface has a wider width and the wide top surface of this convex portion is joined to a flat plate, the joint area will be very large and the pressure resistance of the heat exchanger will be greatly increased. ,
preferable.

In this case, in order to obtain the same compressive strength as that of the conventional heat exchanger, it is possible to reduce the wall thickness of the flat plate made of aluminum and the thickness of the first fluid flow path forming body made of the aluminum hollow extrusion mold material. The advantage is that the weight of the heat exchanger can be reduced.

Embodiment Next, an embodiment of the present invention will be described based on the drawings.

The embodiment shows a case where the heat exchanger according to the present invention is applied to an air-cooling type intercooler (air supply intercooler).

In this specification, the front and rear and the left and right are based on FIG. 2, the front means the front side of the drawing sheet in FIG. 2, the rear means the back side, the left means the left side of the figure, and the right side is the right side. Shall be said.

In the drawings, an intercooler according to the present invention (1)
Is a large number of first flow paths (A) through which supply air flows as a heat exchange first fluid, and a large number of second flows through which cooling air is flown as a heat exchange second fluid that should be heat exchanged with the first fluid. The roads (B) are alternately provided.

The large number of first flow paths (A) through which the supply air flows is made to communicate with the supply air introduction tank (12) and the discharge air tank (13) on both the front and rear sides of the both tanks (12) and (13). A supply air introduction pipe (14) and a discharge pipe (15) are connected to the upper part of each.

Here, the first flow path (A) is interposed between the flat plates (2) and (2) made of aluminum brazing sheets facing each other with a predetermined gap, and the flat plates (2) and (2). And the first fluid flow path forming body (3).

On the other hand, the second flow path (B) is interposed between the flat plates (2) and (2) facing each other at a predetermined interval and the flat plates (2) and (2) (2) (). A pair of side wall parts (10) (10) made of aluminum extruded shape and arranged so as to correspond to the front and rear side edges, and both side wall parts (10).
(10) It is formed by corrugated fins (11) with louvers located in the middle of the comrades.

The first fluid flow path forming member (3) includes a pair of side wall portions (5) (5) for holding a gap, which are arranged so as to correspond to the left and right side edges of the flat plate (2), and the side wall portions (5). ) (5) A plurality of hollow portions (6) having a substantially rhombic cross section parallel to the side wall portions (5) and (5) are formed inside, and the upper and lower outer surfaces are each corrugated in cross section. Made of an aluminum extruded material consisting of a hollow connecting wall portion (4) provided with a convex section (7) (7) having a cross-section dovetail shape of a required height extending upward or downward on the wave head (4a), The flat top surfaces (7a) (7a) of the dovetail-shaped convex portions (7) (7) on the upper and lower sides of the hollow connecting wall portion (4) are respectively joined to the flat plate (2).

The cross-sectional area (S1) of the hollow portion (6) having a substantially rhombic cross section inside the hollow connecting wall portion (4) and the corrugated concave portions (8) on both the upper and lower outer surfaces of the hollow connecting wall portion (4), Convex parts on both sides (7)
(7) and the flat plate portion (2a) facing the concave portion (8)
The cross-sectional area (S2) of the hollow portion (9) having a substantially pentagonal cross section surrounded by is substantially equal.

Specifically, the equivalent diameter of the hollow portion (6) having a substantially rhombic cross section inside the hollow connecting wall portion (4) is, for example, about 2.5 mm, whereas the hollow connecting wall portion (4) has an equivalent diameter. The equivalent diameter of the hollow portion (9) having a substantially pentagonal cross section on both the upper and lower outer sides is about 2.3 mm, and the cross-sectional areas (S1) (S2) of both hollow portions (6) (9) are
It is supposed to be almost equal.

In the above conventional intercooler, the equivalent diameter of the hollow portion having a substantially rhombic cross section inside the first fluid flow path forming member made of an aluminum hollow extruded material is, for example, about 2.5 mm. The equivalent diameter of the hollow part having a substantially triangular cross-section on both the upper and lower outer sides of the wall part was about 1.5 mm, and the cross-sectional areas of both hollow parts were quite different from each other.

For this reason, conventionally, the flow rates and flow velocities of the fluids flowing in both hollow portions are considerably different, resulting in non-uniform flow and large pressure loss.

In addition, in the above-mentioned embodiment, the shape of the convex portion (7) provided on the corrugated portion (4a) is formed on both upper and lower outer surfaces of the corrugated section of the hollow connecting wall portion (4) of the first fluid flow path forming body (3). , Cross-section dovetail, that is, the convex portion (7) is wider than the width of the crest (4a)
Since the flat top surface (7a) of the is made wider, and the wide top surface (7a) of the convex portion (7) is joined to the flat plate (2), the first fluid flow path forming body is formed. The joint area between (3) and the flat plate (2) is very large, and the pressure resistance of the intercooler (1) is significantly increased.

Therefore, for example, in order to obtain the same compressive strength as that of the intercooler in which the narrow wave tops on both the upper and lower sides of the conventional hollow connecting wall are directly joined to the flat plate, the flat plate (2) and the first fluid flow can be obtained. The wall thickness of the channel forming body (3) can be reduced respectively.

For example, the hollow connecting wall portion (4) of the first fluid flow path forming body (3)
If the width of the wave crests (4a) on both the upper and lower outer surfaces of is 0.4mm, while the width of the flat top surface (7a) of the convex section (7) with a transverse cross section is 0.7mm, the intercooler Weight of (1) is about 20
% Could be reduced.

In the intercooler (1) according to the present invention, at least three flat plates (2) are used. Therefore, the smallest intercooler (1) theoretically has one first flow path (A) and one second flow path (B). In fact, taking the intercooler as an example, the intercooler (1) has 1 to 20 first flow paths (A) and 1 to 20 second flow paths (B). The 1st channel (A) and the 2nd channel (B) are arranged by turns. The number of such channels (A) and (B) is merely an example, and the number of both channels (A) and (B) is set depending on the size of the intercooler (1) and the heat exchange performance. Further, the fin member (11) of the second flow path (B) is not limited to the corrugated fin, and may be formed of fins having other shapes.

The intercooler (1) of each of the above-mentioned embodiments is used as a so-called horizontal type intercooler in which the fluid passages (A) and (B) are horizontally arranged.
May be used as a vertical intercooler in which both flow paths (A) and (B) are vertically arranged.

Further, in the illustrated intercooler (1), the first flow path (A) and the second flow path (B) are arranged orthogonally, but both flow paths (A) and (B) are parallel to each other. It may be placed in. And in this case, both flow paths (A) and (B)
The two kinds of fluid inside are transferred so as to be parallel to each other or to be opposite to each other.

In addition, although the present invention shows a case where the present invention applies the heat exchanger (1) to an intercooler, the heat exchanger of the present invention is not limited to the intercooler, and it can be used for two types of fluids, gas and fluid. It can be similarly applied to various heat exchangers that perform heat exchange.

Advantageous Effects of Invention The present invention, as described above, includes at least one first flow path through which the heat exchange first fluid flows, and at least one first flow path through which the heat exchange second fluid to be heat-exchanged with the first fluid flows. Two flow paths, the first flow path is formed by flat plates facing each other with a predetermined gap, and a first fluid flow path forming body interposed between the flat plates, Flat plates whose flow paths are opposed to each other at a predetermined interval, and a pair of side wall parts for holding the space interposed between the flat plates and arranged so as to correspond to the left and right or front and rear side edges of the flat plate, In a heat exchanger formed by a fin member positioned in the middle of both side wall parts, a pair of first fluid flow path forming members arranged so as to correspond to both left and right edges of the flat plate. The space side wall part and these side wall parts A hollow that is connected and has a large number of hollow portions parallel to the side wall portion, the upper and lower outer surfaces are each corrugated in cross section, and the wave head has a convex portion of a required height extending upward or downward. Made of aluminum extruded material consisting of the connecting wall part, and the cross-sectional area of the hollow part inside the hollow connecting wall part, the corrugated concave parts on the upper and lower outer surfaces of the hollow connecting wall part, the convex parts on both sides of this, and the concave part. Since the cross-sectional areas of the hollow portions surrounded by the flat plate portions facing each other are substantially the same, the cross-sectional areas of all the hollow portions in the first flow path are substantially the same. Therefore, the flow rate and the flow velocity of the fluid flowing in the hollow portion become equal, the fluid flow becomes uniform, and the pressure loss is very small. For example, when the heat exchanger according to the present invention is applied to an intercooler, Even if high-temperature and high-pressure air flows at high speed in the passage, the pressure loss is very small and the heat exchange performance is improved.

[Brief description of drawings]

The drawings show an embodiment in which the present invention is applied to an intercooler, and FIG. 1 is an exploded perspective view of a main part of the intercooler,
FIG. 2 is a front view of the relevant part, and FIG. 3 is a schematic side view of the same. (A) ... 1st fluid channel, (B) ... 2nd fluid channel, (1)
… Intercooler (heat exchanger), (2)… flat plate, (2a)
... flat plate part, (3) ... first fluid flow path forming body, (4) ... hollow connection wall, (4a) ... corrugated head, (5) ... spacing side wall part, (6) ... hollow part, ( 7) ... convex part, (8) ... corrugated concave part, (9) ... hollow part, (10) ... side wall part for spacing, (1)
1) ... Fin member, (S1) (S2) ... Cross-sectional area.

Claims (1)

[Claims] 1. At least one first flow path (A) through which a heat exchange first fluid flows, and at least one second flow path (through which a heat exchange second fluid to be heat-exchanged with the first fluid flows). B)
And flat plates (2) and (2) having first flow paths (A) facing each other at a predetermined interval, and these flat plates (2).
(2) First fluid flow path forming body (3) interposed between the two
The second flow path (B) is formed by and the flat plates (2) and (2) that face each other with a predetermined gap therebetween, and these flat plates (2) and (2) are interposed between the flat plates (2) and (2). 2) (2)
A fin member (11) located in the middle of a pair of side wall portions (10) (10) for maintaining a space and both side wall portions (10) (10) arranged so as to correspond to the left and right or front and rear side edges of ), The first fluid flow path forming body (3) has a pair of side wall portions for spacing ((3) arranged so as to correspond to both left and right edges of the flat plate (2). 5) and (5) and both side wall portions (5) and (5) are connected to each other, and a plurality of hollow portions (6) parallel to the side wall portions (5) and (5) are provided inside, and both upper and lower outer surfaces are An extruded aluminum material having a hollow connecting wall portion (4) each having a corrugated cross-section and a convex portion (7) (7) of a required height extending upward or downward on the wave head (4a). Hollow part (6) made inside by hollow connecting wall part (4)
Cross-sectional area (S1) of the hollow connecting wall (4) and the corrugated concave portions (8) on the upper and lower outer surfaces of the hollow connecting wall portion (4), the convex portions (7) (7) on both sides of the corrugated concave portion (8), and the flat plate facing the concave portion (8). A heat exchanger in which the cross-sectional area (S2) of the hollow portion (9) surrounded by the portion (2a) is substantially equal.