JP3210985B2 - Heat exchanger - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an oil cooler,
The present invention relates to a heat exchanger used for an aftercooler, an intercooler, a radiator, and the like.

[0002]

2. Description of the Related Art A pair of left and right side plates, a plurality of flat hollow members arranged in parallel at a predetermined interval between the left and right side plates, and a space between upper ends of flat hollow members adjacent to the left and right and a lower end thereof. An intermediate spacer disposed between the flat hollow bodies, an end spacer disposed between upper and lower ends of left and right side plates and upper and lower ends of a flat hollow body adjacent thereto; By forming a fluid passage hole in each of the upper and lower end portions and each spacer, a plurality of parallel flat tube portions having a flow path connecting between the upper and lower header portions having flow paths extending left and right and the upper and lower header portions are formed. The heat exchanger is
As is conventionally known, in this type of conventional heat exchanger, a joint for connecting a pipe member is provided at the opening edges of the upper and lower header portions so as to protrude from the side plate.

[0003]

In the above-mentioned conventional heat exchanger, the joint for connecting the pipe members protrudes from the side plate.
In the heat exchanger manufacturing process, after brazing the heat exchanger body excluding the joints at once, or argon welding the joints,
Or, it is necessary to create a special jig that sandwiches the entire heat exchanger including the joint from both sides and perform a process of batch brazing,
In any case, there is a problem that the cost is increased.

[0004] It is an object of the present invention to provide a heat exchanger manufacturing process in which a joint is not welded with argon, and a special jig for sandwiching the entire heat exchanger including a joint for connecting pipe members from both sides is prepared. It is to provide a heat exchanger which can be brazed.

[0005]

According to a first aspect of the present invention, there is provided a heat exchanger comprising a pair of left and right side plates, a plurality of flat hollow bodies arranged in parallel at a predetermined interval between the left and right side plates, Intermediate spacers disposed between the upper ends of the adjacent flat hollow bodies and between the lower ends thereof, and disposed between the upper and lower ends of the left and right side plates and the upper and lower ends of the adjacent flat hollow bodies. The upper and lower end portions of each flat hollow body and the respective spacers are provided with fluid passage holes, so that a flow connecting the upper and lower header portions having flow paths extending to the left and right is provided. In the heat exchanger in which a plurality of parallel flat tube portions having passages are formed, the fluid passage hole of the end spacer is used for connecting a piping member, and the vertical length of the side plate is set to the length of the end spacer. Inner glue between fluid passage holes Remote shortened, on the outer surface of the end spacer, and is characterized in that the side plate end receiving step portion having a width equal to the thickness of the side plate is provided.

According to a second aspect of the present invention, there is provided a heat exchanger comprising a pair of left and right side plates, a plurality of flat hollow members arranged in parallel at a predetermined interval between the left and right side plates, and a pair of flat hollow members adjacent to the left and right. An intermediate spacer disposed between upper ends and between lower ends, and an end spacer disposed between upper and lower ends of left and right side plates and upper and lower ends of a flat hollow body adjacent thereto. Fluid passage holes are formed in the upper and lower ends and each spacer of each flat hollow body, so that a plurality of parallel headers having upper and lower header portions having flow channels extending left and right and flow channels connecting the upper and lower header portions are provided. In the heat exchanger in which the flat tube portion is formed, the fluid passage hole of the end spacer is a screw hole used for connecting a pipe member.
Are both, upper and lower ends of the side plates are brought into contact with the end portion spacer, the upper and lower ends of the side plate, than the cross section of the fluid passing hole
A large through-hole for inserting a piping member is provided.

In the above description, the term "the fluid passage hole of the end spacer is used for connecting the piping member" means that, for example, when the mating piping member has a male thread, the fluid passage hole corresponds to the thread. When the pipe member on the other side has a tapered projection, it means that the fluid passage hole is a corresponding tapered insertion hole.

According to the heat exchanger of the first invention, since the fluid passage hole of the end spacer is used for connecting the piping member, it is not necessary to attach a joint for connecting the piping member, and the side plate is not required. Since the vertical length is shorter than the inner diameter of the fluid passage holes of the end spacer, and the outer surface of the end spacer is provided with a side plate end storage step having a width equal to the thickness of the side plate, The left and right sides of the heat exchanger become flat.

[0009] According to the heat exchanger according to the second invention, since the fluid passing hole of the end spacer, there is a reference et <br/> Re ball screw holes for the piping member connection, joint piping member connected The upper and lower ends of the side plate are brought into contact with the end spacers, and the upper and lower ends of the side plate are provided with through holes for inserting piping members. The side surface becomes flat.

[0010]

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

In this specification, front and rear and left and right refer to FIG. 1, the front refers to the front side in FIG. 1, the rear refers to the same back side, and the left and right refer to the left and right in FIG.

The heat exchanger (1) according to the present invention is made of aluminum (including an aluminum alloy), and as shown in FIG.
1) Upper and lower header portions (21) having (C2), parallel flat tube portions (22) having both ends connected to the upper and lower header portions (21), and arranged between adjacent flat tube portions (22). Louvered corrugated fins (10). A portion of the louvered corrugated fin (10) is used as an external air flow path (A), and the alternate flat parallel pipe section (22) is used as an external air flow path (A).
(B). The upper and lower header portions (21) are each partitioned by a partitioning intermediate spacer (23) located slightly to the right of the center. Thus, the heat exchanger has an oil cooler section (1a) on the left side and an after cooler section (1b).
And the right part. Oil cooler
(1a) includes a lower header portion (2) from the left end opening of the lower header portion (21).
After flowing into the left channel (C1) in 1), each flat tube part (22)
The oil flow path (B1) flows upward from the bottom to the left flow path (C1) in the upper header section (21), and flows out from the left end opening of the upper header section (21). C1), (B1), and (C1) are formed.
After flowing into the right flow path (C2) in the lower header section (21) from the right end opening of the lower header section (21), the aftercooler section (1b) flows into the flat pipe sections (22). Flowing from the bottom up the road (B1),
It reaches the right flow path (C2) in the upper header section (21), and
(21) Compressed air flow path (C2) (B2) (C
2) is formed. A side plate (20) is arranged on the left side of the oil cooler part (1a) and on the right side of the after cooler part (1b), and between the side plate (20) and the flat tube part (22) adjacent thereto. A louvered corrugated fin (10) is provided. Each corrugated fin (10) has an external air flow path (A) with oil flow paths (C1) (B1) (C1) and compressed air flow paths (C2) (B2).
It is provided so as to be orthogonal to (C2).

This heat exchanger is called a tankless oil cooler or a tankless aftercooler, and the upper and lower header portions (21) and the flat tube portion (22) are formed as follows. .

Referring to FIGS. 1 to 4, a heat exchanger
(1) is a plurality of flat hollow bodies (2) arranged in parallel at a predetermined interval between the left and right side plates (20), and upper and lower ends of the flat hollow bodies (2) adjacent on the left and right. Between a pair of upper and lower intermediate spacers (8) arranged between the lower ends and between the upper and lower ends of the left and right side plates (20) and the upper and lower ends of the flat hollow body (2) adjacent thereto. A pair of upper and lower left and right end spacers
(24). Each corrugated fin (10) has upper spacers (8) (23) (24) and lower spacers (8) (23) (24)
It is sandwiched between.

Each flat hollow body (2) comprises a pair of flat plates (3) and a flow path forming body (5) sandwiched between these flat plates (3).
The flat plate (3) is made of aluminum brazing sheet, and has fluid passage holes (4) at both upper and lower ends of the flat plate (3). The flow path forming body (5) is provided with a communication gap (14) between a peripheral wall (6) along the peripheral edge of both flat plates (3) and upper and lower ends of the peripheral wall (6). ) And a wall portion (7) for enlarging the heat transfer surface.

The flow path forming body (5) is made of an extruded aluminum material comprising a front and rear side wall (12) and a wall part (7) for enlarging a heat transfer surface in the middle between the two walls. Enlargement wall
The upper and lower ends of (7) are cut away to leave the upper end (12a) and lower end (12b) of the front and rear side walls (12), respectively, and the upper end (12a) of the front and rear side walls (12) and The lower end portions (12b) are bent inward, and the upper ends (12a) of the side walls and the ends of the lower end portions (12b) of the side walls after folding are abutted against each other.

The flow path forming body (5) is different between the oil cooler and the after cooler, and as shown in FIG.
Wall for expanding the heat transfer surface of flow path forming body (5) for oil cooler
In (7), a large number of arched projections (15) with fluid passage holes projecting to the left and right are formed by forming the plate-shaped connecting wall using a press or forming rolls. The wall (7) for expanding the heat transfer surface of the road forming body (5)
A cylindrical part (17), which is provided integrally with the extruded aluminum member (11) and is parallel to the front and rear side walls (12), and has a parallel cross-section and a substantially rhombic shape.
It is constituted by.

The intermediate spacers (8) and (24) have upper and lower headers.
Except for the above-mentioned intermediate spacer (23) for partitioning (21), a fluid passage hole (9) is provided. The partition intermediate spacer (23) and the other spacer (8) are
Only the presence or absence of (9) is different.

The end spacer (24) is also provided with a fluid passage hole (25), but the end spacer (24) has a fluid passage hole (25).
Are female threads for connecting the piping members, so that the piping members can be connected without attaching the socket for connecting the piping members to the side plate (20). Further, the vertical length of the left and right side plates (20) is slightly longer than the vertical length of the corrugated fin (10), and the upper and lower ends thereof are connected to the fluid passage holes (25) of the end spacer (24). ) So that it does not fall on. The end spacer (24) is thicker than the other spacers (8) and (23) by the thickness of the side plate (20), and the outer surface of the end spacer (24) has the side plate (20). A side plate end storage step (26) having a width equal to the thickness is provided. Thus, the end spacer (24) and the side plate (20) are flush.

The peripheral wall (6) of the flow path forming body (5) constructed as described above is joined to the peripheral edges of the two flat plates (3) sandwiching the peripheral wall (6), so that the heat transfer surface expanding wall is formed. Part (7), gaps (14) above and below it, and a fluid passage hole opening in the gap (14)
(4) is formed, and the plurality of flat hollow bodies (2) are connected to each other with an intermediate spacer (8) having a fluid passage hole (9).
Channels that extend to the left and right
(C1) Upper and lower header sections (21) having (C2) and upper and lower header sections (2
1) A plurality of parallel flat tube portions (22) having flow paths (B1) and (B2) connecting them are formed. The end spacers (24) serve as entrances and exits for the upper and lower header portions (21) and also serve as joints for connecting piping members.

The heat exchanger (1) comprises a flat plate (3), spacers (8), (23), (24) and corrugated fins (10), a flow path forming body (5), and left and right side plates (20). ) Are superposed in a predetermined order, and are collectively brazed by, for example, a vacuum brazing method. In the manufacturing process of the heat exchanger, the end spacers (24) and the side plates (20) are flush with each other, so that the brazing can be performed at once without specially manufacturing a dedicated jig. And at this time, the heat exchanger (1)
The butting ends of the bent upper and lower ends (12a) of the front and rear side walls (12) of the peripheral wall (6) of each flow path forming body (5) are eluted from the aluminum brazing sheet flat plate (3). It is joined by the brazing material. Then, the end spacer (2
4) also serves as a joint for connecting the piping members, so the socket for connecting the piping members, which has been conventionally attached by argon welding, is unnecessary, the number of parts is reduced, and the argon welding step of the socket is omitted. You. Note that the end spacer (2
The fluid passage hole (25) of 4) is a female thread, but can be appropriately changed as long as it conforms to the shape of the mating side of the piping member, for example, a tapered hole or a straight hole. It may be a hole.

FIG. 5 shows a modification of the end member. In the figure, the vertical length of the side plate (40) is the flat hollow body (2).
Are equal to the vertical length of the flat plate (3) constituting the above.
The end spacer (41) is a fluid passage hole (42) that also serves as a pipe member connection screw hole in the spacer (23) that separates the upper and lower header portions (21).
It was opened. The side plate (40) has a through hole (43) for inserting a pipe member slightly larger than the cross section of the fluid passage hole (42). In the manufacturing process of the heat exchanger having such an end portion, flat side plates (40) are provided at the left and right ends.
Only exist, so that they can be brazed at once from both sides. Therefore, the socket for connecting the piping member, which is conventionally mounted by argon welding, is unnecessary, the number of parts is reduced, and the argon welding step of the socket is omitted.

In the above, air is passed through the external air flow path (A) of the heat exchanger (1) by forced air blowing by a fan or by natural ventilation caused by running of a vehicle or the like.

On the other hand, in the oil cooler section (1a) of the heat exchanger (1), the oil sent from the pump having a predetermined discharge pressure is supplied to the flow path (C1) in the lower header section (21). Into the oil flow path (B1), and from the front, hits the wall surface of a large number of arched projections (15) with fluid passage holes in the oil flow path (B1). And the flow reaches the flow path (C1) in the upper header section (21) and is discharged to the outside.

On the other hand, the aftercooler section (1) of the heat exchanger (1)
In b), the compressed air sent from the compressor flows into the flow path (C2) in the lower header part (21), and further, the heat transfer surface expansion wall part (the compressed air flow path (B2)). 7) A large number of cross-sectional substantially rhombic cylindrical portions (17) move in parallel flow and move to the upper header portion (21).
It is discharged to the outside through the internal flow path (C2).

The numbers of the air passages (A) and the cooled fluid passages (B) of the heat exchanger (1) in the above embodiment are as follows.
It is set in consideration of the size of the heat exchanger (1) and the heat exchange performance.

The heat exchanger (1) of each of the above embodiments is used as a so-called vertical heat exchanger in which the fluid passage (B) to be cooled is vertically arranged. ) May be used as a horizontal heat exchanger in which the cooled fluid flow path (B) is arranged horizontally.

Further, the heat exchanger (1) of the above embodiment is used as having two functions of an oil cooler and an after cooler.
(1) Other types of heat exchangers that exchange heat of two or three types of fluids for gases and fluids by combining oil coolers, aftercoolers, intercoolers, radiators, etc. The same applies.

[0029]

According to the heat exchangers of the first and second aspects of the present invention, it is not necessary to attach a joint for connecting pipe members, so that the number of parts is reduced and the joint is welded with argon in the heat exchanger manufacturing process. This saves time and effort. Also,
Since the left and right side surfaces of the heat exchanger are flat, it is possible to perform brazing all together without creating a dedicated jig.

[Brief description of the drawings]

FIG. 1 is a partially cutaway front view showing a heat exchanger of the present invention.

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

FIG. 3 is an exploded perspective view of members constituting the heat exchanger of FIG.

FIG. 4 is an enlarged view of a main part of FIG. 1;

FIG. 5 is an exploded perspective view of components of another embodiment of the heat exchanger of the present invention.

[Explanation of symbols]

 (1) Heat exchanger (2) Flat hollow body (4) Fluid passage hole (8) Intermediate spacer (9) Fluid passage hole (14) Fluid passage hole (20) Side plate (21) Upper and lower header (22) Flat tube (24) Spacer (25) Fluid passage hole (26) Side plate storage step (41) Spacer (42) Fluid passage hole

──────────────────────────────────────────────────続 き Continuation of the front page (56) References Japanese Utility Model Sho 62-29577 (JP, U) (58) Field surveyed (Int. Cl. ⁷ , DB name) F28F 9/18 F28F 1/30 F28F 3 / 00

Claims (2)

(57) [Claims] 1. A pair of left and right side plates (20) and a pair of left and right side plates (20).
A plurality of flat hollow bodies (2) arranged in parallel with a predetermined interval between them and the flat hollow bodies (2) adjacent to each other on the left and right are disposed between the upper ends of the flat hollow bodies (2) and between the lower ends thereof. An intermediate spacer (8) and an end spacer (24) disposed between upper and lower ends of the left and right side plates (20) and upper and lower ends of the flat hollow body (2) adjacent thereto. The fluid passage holes (4) are provided in the upper and lower ends of each flat hollow body (2) and in the spacers (8) (24).
(9) By opening (25), the flow path (C
1) A plurality of parallel flat tube sections (2) having flow paths (B1) (B2) connecting the upper and lower header sections (21) having (C2) and the upper and lower header sections (21).
2), the fluid passage hole (25) of the end spacer (24) is used for connecting a piping member, and the vertical length of the side plate (20) is A side plate end storage step (26) which is shorter than the inner diameter of the fluid passage holes (25) of the (24), and has a width equal to the thickness of the side plate (20) on the outer surface of the end spacer (24). A heat exchanger comprising: 2. A pair of left and right side plates (40) and left and right side plates (40).
A plurality of flat hollow bodies (2) arranged in parallel at a predetermined interval between the flat hollow bodies (2) adjacent to each other on the left and right are disposed between the upper ends and between the lower ends of the flat hollow bodies (2). An intermediate spacer (8) and an end spacer (41) disposed between upper and lower ends of the left and right side plates (40) and upper and lower ends of the flat hollow body (2) adjacent thereto. The fluid passage holes (4) are formed in the upper and lower ends of each flat hollow body (2) and in each of the spacers (8) (41).
(9) By opening (42), the flow path (C
1) A plurality of parallel flat tube sections (2) having flow paths (B1) (B2) connecting the upper and lower header sections (21) having (C2) and the upper and lower header sections (21).
2), the fluid passage holes (42) of the end spacers (41) are screw holes used for connecting piping members, and the upper and lower ends of the side plate (20). Is brought into contact with the end spacer (41) and the side plate (4
A heat exchanger, characterized in that the upper and lower ends of ( 0) are provided with through-holes (43) for inserting a piping member larger than the cross section of the fluid passage hole (42) .