JPH11101591A - Side plate of lamination-type heat exchanger - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve assembly-working efficiency by forming the first side plate out of the side plates of a lamination-type heat exchanger of aluminum extrusion sections, providing a thick part with nearly square section at least at one edge part out of both edge parts, and forming a connection hole at the thick part and constituting a socket part for connecting a fluid conduit. SOLUTION: A lamination-type heat exchanger 1 has a plurality of middle plates 4, each middle plate 4 has a recessed part 4 for forming a fluid passage and a pair of upper and lower recessed parts 6 for forming a header on one surface, and a plurality of left and right parallel flat pipe parts 2 and a pair of upper and lower header parts 3 are formed by overlapping and brazing. Also, a plurality of corrugate fins 7 to be brazed between the adjacent flat pipe parts 2 and two left and right side plates 8 and 9 are provided. In this case, the side plate 8 is made of aluminum extrusion forming material, a thick part 8a with nearly square section extending in width direction is provided at both upper and lower edge parts, and a connection hole 11 is formed at the thick part 8a, thus a socket part 10 for connecting a fluid conduit is constituted.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a laminated heat exchanger used as, for example, an oil cooler for a vehicle, and more specifically, to a side plate of a laminated heat exchanger.

[0002] The term "aluminum" used in this specification includes aluminum alloys in addition to pure aluminum.

[0003]

2. Description of the Related Art As a side plate of a conventional laminated heat exchanger, one or two communication holes are formed in at least one end of both ends of an aluminum plate.
It is known that one end of a socket for connecting a fluid conduit is brazed to an outer surface of a peripheral portion of a communication hole.

[0004]

The joint strength between the socket and the other heat exchanger components, especially if the socket has internal threads in the connection holes, is the external thread of the end of the fluid conduit to this internal thread. However, if the socket is brazed to the outer surface of the end of the side plate as described above, the brazing material may not evenly reach the part to be joined. There is a risk that the joint strength will be insufficient due to failure,
The tightening torque of the external thread at the end of the fluid conduit to the internal thread of the connection hole of the socket cannot be increased too much, and there is a possibility that fluid leakage or the like may occur from these connection parts due to insufficient tightening.

[0005] The socket and side plate are
With the intermediate plate and fins, which are other components of the stacked heat exchanger, they are collectively brazed by, for example, a vacuum brazing method or a furnace brazing method, but when the socket and the side plate are separate bodies, There is a problem that the number of parts is increased by that much, and the number of set man-hours for brazing is also increased, which is troublesome.

An object of the present invention is to solve the above problems.

[0007]

SUMMARY OF THE INVENTION A first side plate of a laminated heat exchanger according to the present invention is made of extruded aluminum and has a transverse cross-section extending at least to one end of both ends. It has a thick portion having a substantially square surface, and one or two connection holes are formed in the thick portion to form a fluid conduit connection socket portion.

[0008] As described above, if the socket is integrally formed at the end of the side plate, the joint generated when the socket and the side plate are separately formed and the socket is brazed to the outer surface of the end of the side plate. When there is no problem of insufficient strength, for example, when a female screw is provided in the connection hole of the socket, the tightening torque of the male screw at the end of the fluid conduit to the female screw can be sufficiently increased.
In addition, the number of parts is reduced, and the number of setting steps for batch brazing together with the intermediate plate and the fins, which are other components of the stacked heat exchanger, can be reduced.

Next, a second one of the side plates of the laminated heat exchanger according to the present invention is composed of a side plate body made of an aluminum plate and an aluminum extruded shape having the same length as the width of the side plate body. And a fluid conduit connection socket joined to at least one end of both end portions of the side plate body, wherein the socket has a substantially rectangular cross section and one or two
A socket main body having two connection holes; and a ridge extending from the socket main body toward the side plate main body and joined to an end of the side plate main body.

The joining between the side plate body and the socket is preferably performed by mechanical joining such as caulking or rivet joining.

If the side plate is composed of the side plate main body and the socket joined to the end of the side plate, the side plate will be collectively assembled with other components such as the intermediate plate and the fins which are other components of the laminated heat exchanger. The number of set man-hours for attaching can be reduced.

When the length of the intermediate plate in the stacked heat exchanger is long, it is necessary to lengthen the side plate. If the intermediate plate is formed of an extruded aluminum material like the first side plate, Although the production cost of the extrusion die for that purpose is high, the second side plate does not require such an expensive extrusion die, and thus has an advantage that the production cost can be reduced.

In applying the side plate of the present invention to a laminated heat exchanger, the following modes are conceivable. First, (a) one of the two side plates, the side plate of the present invention having a socket or a socket at both ends, and (b) both side plates,
A side plate according to the present invention in which a socket or a socket is provided at any one end.
The embodiments of (a) and (b) include a plurality of parallel flat tube portions and a pair of header portions for communicating one end portions and the other end portions of the flat tube portions by stacking an intermediate plate having a predetermined shape. Is applied to a normal laminated heat exchanger in which is formed. Also, (c) both side plates,
The side plate of the present invention may be provided with a socket or a socket at both ends. The embodiment (c) is applied to a composite heat exchanger such as an aftercooler juxtaposed oil cooler constructed by partitioning both header portions into two in the above-described conventional stacked heat exchanger. It is. Further, (d) one of the two side plates is a side plate of the present invention having a socket or a socket at one end, and two connection holes are formed in the socket or the socket in parallel. And (e) using both side plates as the side plate of the present invention having a socket portion or a socket at one end, and having two connection holes formed in the socket portion or the socket in parallel. And the like. The embodiments (d) and (e) are characterized in that a plurality of parallel flat tubes having a U-shaped fluid passage therein by stacking intermediate plates of a predetermined shape, and both ends of the fluid passage at one end of the flat tube are provided. And a pair of header portions provided in parallel to communicate with each other.

[0014]

Embodiments of the present invention will be described with reference to the drawings. In the following description, upper, lower, left and right refer to the upper, lower, left and right in FIGS. 1, 3, 4, 5, and 6, respectively.

A. First Embodiment This embodiment is shown in FIGS. In these figures, the laminated heat exchanger (1) has a recess (5) for forming a fluid passage on one side and a pair of recesses (6) for forming a header connected to both ends of the recess (5), A plurality of intermediate plates (4) forming a plurality of right and left parallel flat tube portions (2) and a pair of upper and lower header portions (3) by being overlapped and brazed, and adjacent flat tube portions ( 2) A plurality of corrugated fins (7) arranged between the outsides of the flat tube sections (4) at the left and right ends and brazed to these flat tube sections (2), and corrugated fins at the left and right ends.
(7) and brazed to the upper and lower ends of these fins (7) and both headers (3).
And two side plates (8, 9).

Each intermediate plate (4) is made of an aluminum brazing sheet clad with brazing material on both sides, and both header forming recesses (6) are deeper than the fluid passage forming recesses (5). A communication hole (not shown) is formed in the bottom wall of the forming recess (6).

The left side plate (8), to which the first side plate of the present invention is applied, is made of extruded aluminum material, and has a substantially rectangular cross section extending in the width direction at both upper and lower ends. The fluid conduit connection socket (10) is formed by forming a single female threaded connection hole (11) in these thick portions (8a).

The right side surfaces of both socket portions (10) are brazed to the bottom wall outer surfaces of the upper and lower header forming recesses (6) of the intermediate plate (4) at the left end.

The right side plate (9) is made of an aluminum brazing sheet clad on one side with a brazing material, and has a bent portion (12) which is bent leftward in a crank shape at both ends. The left side surface of the vertical wall portion of the bent portion (12) is brazed to the outer surface of the bottom wall of the upper and lower header forming recesses (6) of the intermediate plate (4) at the right end, whereby the recesses (6 ) The communication hole opened in the bottom wall is closed.

The above-mentioned laminated heat exchanger (1) comprises an intermediate plate
(4), corrugated fins (7), and side plates
(8, 9) and the like are appropriately assembled, and are formed by collectively brazing them by, for example, a vacuum brazing method or an in-furnace brazing method while restraining them with a jig.

B. Second Embodiment This embodiment is shown in FIG. The laminated heat exchanger (21) shown in FIG. 3 is obtained by applying the first side plate of the present invention to the left and right side plates.

The left side plate (28) is made of extruded aluminum material, and has a thick portion (28a) having a substantially rectangular cross section extending in the width direction at the upper end, and one thick portion (28a). By forming a connection hole (11) with a female thread, a fluid conduit connection socket (10) is formed. Socket part (10)
Is brazed to the outer surface of the bottom wall of the upper header forming recess (6) of the left end intermediate plate (4). At the lower end of the left side plate (28), a bent portion (22) bent in a crank shape toward the right side is provided.
The right side surface of the vertical wall portion of 2) is brazed to the outer surface of the bottom wall of the lower header forming concave portion (6) of the intermediate plate (4) on the left end,
Thereby, the communication hole formed in the bottom wall of the recess (6) is closed.

The right side plate (29) is also made of extruded aluminum and has a thick portion (29a) having a substantially rectangular cross section extending in the width direction at the lower end, and one thick portion (29a) is provided for this thick portion (29a). By forming a connection hole (11) with a female thread, a fluid conduit connection socket (10) is formed. Socket part (10)
Is brazed to the outer surface of the bottom wall of the lower header forming recess (6) of the right intermediate plate (4). At the upper end of the right side plate (29), a bent portion (22) bent in a crank shape toward the left side is provided, and this bent portion (2
The left side surface of the vertical wall portion of 2) is brazed to the outer surface of the bottom wall of the upper header forming concave portion (6) of the intermediate plate (4) at the right end,
Thereby, the communication hole formed in the bottom wall of the recess (6) is closed.

The rest is the same as the first embodiment.

C. Third Embodiment This embodiment is shown in FIG. The stacked heat exchanger (71) of FIG. 4 also has the first side plate of the present invention applied to the left and right side plates.

The right side plate (29) has a thick portion (29a) having a substantially rectangular cross section extending in the width direction at the upper end thereof.
A connection hole (11) with a female thread is formed in the thick portion (29a) to form a fluid conduit connection socket (10). The left side surface of the socket portion (10) is brazed to the outer surface of the bottom wall of the upper header forming recess (6) of the intermediate plate (4) at the right end. At the lower end of the right side plate (29), a bent portion (2
2) is provided, and the left side surface of the vertical wall portion of the bent portion (22) is formed into a lower header forming recess of the right end intermediate plate (4).
(6) brazed to the outer surface of the bottom wall of the
(6) The communication hole formed in the bottom wall is closed.

The bottom wall of the upper header forming recess (6) of the intermediate plate (4A) located at the center in the left-right direction has no communication hole, and the upper header is formed by the bottom wall of the recess (6). The inside of the part (3) is divided into two right and left. Therefore, in the case of the stacked heat exchanger (71), for example, the left socket portion
The fluid flowing from (10) into the left portion (3L) of the upper header portion (3) flows downward through the flat tube portion (4) connected to the left portion (3L), and flows downward. 3), and then the flat tube section connected to the right side (3R) of the upper header section (3)
(4) After flowing upwards and flowing into the right part (3R),
It is discharged from the right socket (10).

The other points are the same as in the second embodiment.

D. Fourth Embodiment This embodiment is shown in FIG. The laminated heat exchanger (31) in FIG. 5 is one in which the second side plate according to the present invention is applied to the left side plate.

The left side plate (38) includes a side plate body (39) made of an aluminum brazing sheet clad with brazing material on one side, and a side plate body.
And a fluid conduit connection socket (40) made of an extruded aluminum material having the same length as the width of the (39) and joined to both ends of the side plate body (39). The socket main body (40a), which has a substantially rectangular cross section and has one female threaded connection hole (41), and the socket main body (40a) to the side plate body (39)
And a ridge (40b) joined to both ends of the side plate body (39).

The right side surfaces of the socket main portions (40a) of both sockets (40) are brazed to the bottom wall outer surfaces of the upper and lower header forming recesses (6) of the left intermediate plate (4).

At the upper and lower ends of the side plate body (39),
A caulking projection (42) projecting to the left is provided, while a projection fitting through hole (43) is formed in the ridge (40b) of both sockets (40), and these projections (42) are By being expanded by a press or the like while being fitted in the through hole (43) and crimped, the ridges (40b) of both sockets (40) are joined to both ends of the side plate body (39). I have.

The laminated heat exchanger (31) is constructed by joining and integrating a side plate body (39) constituting a left side plate (38) and both sockets (40), and then forming an intermediate plate (31). 4) Assemble the corrugated fins (7) and both side plates (38, 9) as appropriate, and braze them together, for example, by vacuum brazing or in-furnace brazing while restraining them with jigs. Formed by

The other points are the same as in the first embodiment.

E. Fifth Embodiment This embodiment is shown in FIG. The stacked heat exchanger (51) in FIG. 6 also has the second side plate according to the present invention applied to the left side plate.

At the upper and lower ends of the side plate body (59) of the left side plate (58), there are provided bent portions (60) bent in a crank shape toward the left side, and these bent portions (60) are provided. The ridges (4) of both sockets (40) are
0b) are overlapped, and caulking projections (42) are provided on the vertical wall portion of the bent portion (60) so as to protrude leftward, and these projections (42) are projected from both sockets (40). It is pressed and expanded by a press in a state of being fitted in the through hole (42) for fitting a projection of the ridge (41) and caulked.

The upper and lower end faces of the side plate body (59) are in contact with the lower surface of the socket main body (40a) of the upper socket (40) and the upper surface of the socket main body (40a) of the lower socket (40), respectively. The upper and lower bent portions of the upper bent portion (60) of the side plate body (59), with the protruding ridges (40b) of both sockets (40) being opposed to these, It is in contact with the lower surface of the horizontal wall portion of (60). As a result, the contact area between the side plate body (59) and the sockets (40) increases, and the joining strength between the two increases. In addition, positioning of the side plate body (59) and both sockets (40) during assembly is facilitated.

The other points are the same as in the fourth embodiment.

[0039]

According to the first laminated heat exchanger side plate of the present invention, since the socket portion is integrally formed at the end portion, the socket and the side plate are separately formed to form the side plate. There is no problem of insufficient joint strength when a socket is brazed to the outer surface of the end of the socket.For example, when a female screw is provided in the connection hole of the socket, the external thread tightening torque of the end of the fluid conduit to the female screw is used. Can be made sufficiently large, and there is no danger of fluid leakage or the like occurring from the connection between the end of the fluid conduit and the socket. In addition, the number of parts is reduced, and the number of setting steps for batch brazing together with the intermediate plate and the fins, which are other components of the stacked heat exchanger, can be reduced, so that workability can be improved. .

Further, according to the side plate of the second stacked exchanger of the present invention, since the side plate is constituted by the side plate main body and the socket joined to the end thereof, It is possible to reduce the number of setting steps required for batch brazing together with other components such as an intermediate plate and fins, thereby improving workability.

[Brief description of the drawings]

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

FIG. 2 is a perspective view showing a left side plate to which the present invention is applied in the stacked heat exchanger of the first embodiment.

FIG. 3 is a front view of a stacked heat exchanger according to a second embodiment of the present invention.

FIG. 4 is a front view of a laminated heat exchanger according to a third embodiment of the present invention.

FIG. 5 is a front view of a laminated heat exchanger according to a fourth embodiment of the present invention.

FIG. 6 is a front view of a laminated heat exchanger according to a fifth embodiment of the present invention.

[Explanation of symbols]

 (1)… Laminated heat exchanger (8)… Side plate (8a)… Thick part (10)… Fluid conduit connection socket (11)… Connection hole (21)… Laminated heat exchanger (28,29) )… Side plate (28a, 29a)… Thick part (71)… Laminated heat exchanger (31)… Laminated heat exchanger (38)… Side plate (39)… Side plate body (40)… Fluid conduit Connection socket (40a) ... Socket main part (41) ... Connection hole (40b) ... Protrusion (51) ... Laminated heat exchanger (58) ... Side plate (59) ... Side plate body

Claims (2)

[Claims] 1. An extruded aluminum material having a thick portion having a substantially rectangular cross section extending in the width direction at least at one end of both ends, and one or two connection holes formed in the thick portion. The side plate of the laminated heat exchanger, wherein a socket portion for connecting a fluid conduit is formed by being opened. 2. A side plate body made of an aluminum plate, and a fluid made of an extruded aluminum aluminum member having the same length as the width of the side plate body and joined to at least one of both end portions of the side plate body. A socket main body having a substantially rectangular cross section and one or two connection holes, and extending from the socket main body toward the side plate main body. A side plate for a laminated heat exchanger, comprising a ridge joined to an end of a side plate body.