JPH08159686A - Laminate type heat exchanger core - Google Patents

Abstract

PURPOSE: To provide a mount fitment immediately on a side surface by forming an extension where no fluid passage is formed on an end of a predetermined flattened pipe and providing the mount fitment on the extension. CONSTITUTION: A mount fitment 12 is mounted between extensions 5a and 7a and between extensions 7b and 9a, respectively. The mount fitment 12 is formed by pressing a metal plate shaped member, i.e., integrally forming a mount piece 1260 on a vertical plate 125 of an inverted U shaped member 121. A second bolt insertion hole is drilled through an upper plate 122 being a first plate shaped part of the inverted U shaped member 121 and a lower plate 123 being a second plate shaped part. There is further formed through the mount piece 126 a bolt insertion hole 127 for mounting a laminate heat exchanger 1 at a predetermined location of an automobile body. In such a manner, the mount fitment is provided immediately on a side surface without passing through the laminate heat exchanger so that an air stream is prevented from being obscured by the mount fitment.

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 having a fluid passage formed by a laminated structure of a plurality of metal plates, which is an air-cooled laminated type for cooling oil for automobile engines and oil for torque converters. TECHNICAL FIELD The present invention relates to improvement of a mounting structure of a laminated heat exchanger suitable as a die heat exchanger.

[0002]

2. Description of the Related Art The structure of a conventional air-cooled laminated heat exchanger is shown in FIGS. 3 is a front view, FIG. 4A is a plan view of FIG. 3, FIG. 4B is a bottom view, and FIG. 4C is a right side view. As shown in FIG. 3, the conventional laminated heat exchanger 18 is configured by laminating a plurality of flat tubes 21 at regular intervals. Stacked flat tubes 21
As shown in FIG. 4 (d), brazing is performed by joining two bowl-shaped core plates 210 and 210 clad with a brazing material as one set and stacking a plurality of them. Is formed by. Core plates 210 and 2
A fluid passage 211 is formed inside 10. 21
Reference numeral 2 denotes a bulging portion bulging due to the formation of the fluid passage, 213 is a tank for communicating the fluid passages 211 formed in the flat tubes 21, and 214 is an inflow / outflow hole communicating with the fluid passage 211.

Corrugated fins 27 for increasing the heat transfer area are provided between the core plates 210, and inner fins (not shown) are provided inside the flat tubes 21. Reference numeral 22 is an inflow pipe into which the fluid to be cooled flows, and 23 is an outflow pipe. The upper end plate 19 has an L-shaped metal fitting 2 for vertically mounting the laminated heat exchanger 18.
6 are attached.

The fluid flowing from the inflow pipe 22 is deprived of heat via the inner fins, the flat pipes 21 and the corrugated fins 27 while flowing through the fluid passage 211 in each flat pipe 21, and flows out from the outflow pipe 23. It is supposed to do. By the way, in the laminated heat exchanger, a mounting bracket may be required to be provided in a side surface direction of the laminated heat exchanger main body due to a layout of an engine, a transmission, and the like.

However, in the conventional laminated heat exchanger, as shown in FIG. 3, since the end portions of the plurality of flat tubes 21 project on the side surface and there is no flat portion, the mounting metal fitting should be provided directly on the side surface. It is difficult. In addition, the plate-like mounting metal fitting is used for the tank 21.
It is possible to think of a means of mounting by sandwiching between 3 and 213,
Since the load due to the vibration of the vehicle body is directly applied to the fluid seal portion, it is difficult to adopt it in consideration of the sealability.

Therefore, in the conventional laminated heat exchanger 18, as shown in FIG. 3, one end of the mounting member 24 is attached to the upper end plate 19 and one end of the mounting member 25 is brazed or welded to the lower end plate 20, respectively. However, the other end of each of the fittings 24 and 25 passes through the back surface of the laminated heat exchanger 18 and is diverted to the right side surface.

[0007]

The conventional laminated heat exchanger 18 has a mounting bracket 2 that passes through the back surface of the laminated heat exchanger 18.
There is a problem that the flow of air is blocked by 4, 25, and the cooling efficiency is not improved. Moreover, the mounting brackets 24, 2
Since 5 is a large one that passes through the back surface of the stacked heat exchanger 18 and is diverted to the right side surface, the weight of the stacked heat exchanger increases and the manufacturing cost also increases.

Therefore, an object of the present invention is to provide a laminated heat exchanger that realizes a structure in which a fitting is directly provided on the side surface.

[0009]

In order to achieve the above object, the present invention provides a bowl-shaped two core plates (51), (51) at their outer peripheral edges. In the laminated heat exchanger (1) forming a fluid passage (513) by a laminated structure in which a plurality of flat tubes (5) to (9) formed by joining are laminated, the plurality of flat tubes (5)
To (9), predetermined flat tubes (5), (7), (9)
Extension parts (5a), (7a), (7b) and (9a) in which the fluid passage (513) is not formed are formed at the end parts of the extension parts (5a), (7a) and (7b). , (9
Adopt the technical means that a) is provided with a mounting bracket (12).

According to a second aspect of the invention, in the invention of the first aspect, the ends of the two flat tubes (5) and (7) among the plurality of flat tubes (5) to (9). The extension portions (5a) and (7a) are respectively formed on one portion, one extension portion (5a) is contacted with the first plate-shaped portion, and the other extension portion (7a) is contacted with the second plate-shaped portion. The technical means is adopted in which the fittings (12) contacting each other are provided between the extensions (5a) and (7a).

According to a third aspect of the present invention, in the second aspect of the invention, each of the extension portions (5a) and (7a) of the two flat tubes (5) and (7) has a first portion. Bolt insertion holes (511) are formed respectively, and the first plate-like portion (122) and the second portion of the mounting bracket (12) are formed.
The second bolt insertion holes (124) are formed in the plate-shaped portion (123) of each of the first bolt insertion holes (511).
And the mounting bolt (1) into the second bolt insertion hole (124).
6) is inserted, and the technical means that the nut (17) is fastened to the tip of the mounting bolt (16) is adopted.

The reference numerals in parentheses of the above means indicate the correspondence with the concrete means described in the embodiments described later.

[0013]

According to the inventions according to claims 1 to 3, the mounting bracket 12 is directly mounted on the side surface of the laminated heat exchanger 1, and the mounting bracket 12 hinders the air flow. Therefore, the cooling efficiency is improved. Moreover, since the mounting metal fitting 12 has a structure in which it is directly mounted on the side surface of the laminated heat exchanger 1, the mounting metal fittings 24, 25 pass through the rear surface of the laminated heat exchanger 18 and are diverted to the right side surface, compared to the conventional structure. Since the mounting bracket can be made smaller, the weight of the laminated heat exchanger can be reduced and the manufacturing cost can be reduced.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1A is a front explanatory view of a laminated heat exchanger according to the present invention, and FIG. 1B is a perspective partial enlarged explanatory view of a flat tube. Reference numeral 1 is an air-cooled laminated heat exchanger used for cooling engine oil for automobiles or oil for torque converters.

As shown in FIG. 1A, the laminated heat exchanger 1 is made of aluminum, which is laminated between an upper end plate 2 and a lower end plate 3 made of aluminum at equal intervals. The flat tubes 5 to 9 are provided. Laminated flat tubes 5-9
Is a brazing in which two bowl-shaped core plates 51 and 51, 61 and 61, 71 and 71, 81 and 81, 91 and 91 each having a brazing material clad are joined together at their outer peripheral edges and laminated. It is formed by Reference numeral 10 is an inflow pipe into which oil flows, and 11 is an outflow pipe.

A fluid passage 51 is formed on the inner surface of each core plate.
3, bulging portions 512 are formed on the outer surface along the longitudinal direction. At one end of each core plate, a convex tank 514 for allowing oil to flow into or out of the fluid passage 513 is formed. Oil inflow and outflow holes 515 are formed at the top of each tank 514.

A corrugated fin 4 for increasing the heat transfer area on the air side, which is formed by bending a thin strip-shaped aluminum plate in a wave shape, is arranged between the core plates, and the flat tubes 5 to 9 are connected to each other. Inner fins (not shown) for increasing the heat transfer area made of an aluminum thin plate are provided inside. The upper end plate 2 and the lower end plate 3 are provided with L-shaped metal fittings 15 used for vertically mounting the laminated heat exchanger 1.

In the laminated heat exchanger 1 having such a structure, the oil flowing from the inflow pipe 10 flows through the flat tubes 5 to 9 while the inner fins,
Heat is taken away through the flat tubes 5 to 9 and the corrugated fins 4 and flows out from the outflow pipe 11. Here, the structure of the flat tubes 5, 7 and 9 having extension portions formed at the ends will be described by taking the flat tube 5 as a representative. Each core plate 51
At one end (right end in the drawing) of the above, a flat plate-shaped extension portion 510 in which the fluid passage 513 is not formed, that is, in which the bulge portion 512 is not formed is formed. Also,
A first bolt insertion hole 511 is formed in each extension 510. The extension portions 5a of the flat tube 5 are formed by these both extension portions 510.

It should be noted that extension portions 7a and 7b having the same structure as the extension portion 5a are formed at both ends of the flat tube 7, respectively, and a first bolt insertion hole (not shown) is formed in each of the extension portions 7a and 7b.
Are drilled respectively. Also, the extension portion 9 of the flat tube 9
An extension portion 9a having the same structure as the extension portion 5a is formed at one end (a left end in the drawing) of a, and the extension portion 9a is also provided with a first bolt insertion hole (not shown).

Fittings 12 are provided between the extension portions 5a and 7a and between the extension portions 7b and 9a, respectively. As shown in FIG. 2, the mounting bracket 12 is formed by pressing a metal plate-shaped member, and the vertical plate portion 1 of the U-shaped cross-section member 121 is formed.
25 is integrally formed with a mounting piece 126. The second bolt insertion hole 1 is formed in the upper plate portion 122 that is the first plate-shaped portion and the lower plate portion 123 that is the second plate-shaped portion of the U-shaped member 121 in cross section.
24 are provided respectively. Further, the mounting piece 126 is formed with a bolt insertion hole 127 for mounting the laminated heat exchanger 1 at a predetermined position on the vehicle body.

The member 121 having a U-shaped cross section has an upper plate portion 12 thereof.
The upper surface of 2 is the lower surface of the extension portion 5a (7b), and the lower plate portion 123
Is formed in such a size that its lower surface abuts on the upper surface of the extension 7a (9a). Then, when the mounting bracket 12 is fitted with the U-shaped member 121 in section between the extension portions 5a (7b) and 7a (9a), the first bolt insertion holes 511 and 511, and the second bolt. Insertion holes 124 and 1
24 and the 1st bolt insertion hole of the extension part 7a are comprised so that it may connect.

The mounting member 12 is fitted between the extension portions 5a (7b) and 7a (9a), and the shaft portion of the mounting bolt 16 is attached to the first bolt insertion holes 511 and 511, the second bolt insertion hole 124 and 124 and the first bolt insertion hole of the extension portion 7a, and is attached by fastening a nut 17 to the tip of the shaft portion of the attachment bolt 16 protruding from the first bolt insertion hole of the extension portion 7a. Then, the laminated heat exchanger 1 is attached by inserting a predetermined bolt (not shown) into the attachment hole 127 of the attachment piece 126 and inserting and fixing the bolt at a predetermined position of the automobile body.

Next, another embodiment of the present invention will be described.
As shown in FIG. 2 (b), a mounting metal fitting is provided between the extension 5a of the flat tube 5 and the extension 7a of the flat tube 7 and between the extension 7b of the flat tube 7 and the extension 9a of the flat tube 9 as shown in FIG. The L-shaped metal fitting 13 is formed on the outer surface of the vertical plate portion 132 of the U-shaped member 131.
It is also possible to use the mounting member 13 in which the plate surface of No. 4 is welded. Reference numeral 133 is a second bolt insertion hole, and 135 is a mounting hole.

Further, in place of the nut 17, FIG.
The clip type case nut 14 shown in (c) can also be used. The case nut 14 is made of a metal plate member U.
A nut 142 is fixed to the outer plate surface of a clip 141 that is bent in a letter shape. This case nut 1
4 has its nut 142 facing downward and extends 7a (9
It is attached by sandwiching it in a). That is, the case nut 14
Is attached so as to be interposed between the lower plate portion 123 of the U-shaped member 121 (131) and the extension portion 7a (9a).

The mounting bracket 12 (13) has a shaft portion of the mounting bolt 16 which has first bolt insertion holes 511 and 511.
And the second bolt insertion holes 124 (133) and 124.
(133), it is inserted into the first bolt insertion hole of the extension portion 7a, and the tip of the shaft portion is screwed into the nut 142 for attachment. The mounting brackets 12, 13, the mounting bolt 16, the nut 17, and the case nut 14 are made of a metal material such as iron or aluminum.

As described above, in the above-mentioned laminated heat exchanger, since the mounting metal fittings are provided directly on the side surfaces of the laminated heat exchanger without passing through the back surface thereof, the air flow is obstructed by the mounting metal fittings. There is no. Therefore, the cooling efficiency is improved.
Moreover, since the mounting bracket is provided directly on the side surface,
Since the mounting bracket can be made smaller than the conventional structure in which the mounting bracket passes through the back surface of the laminated heat exchanger, the weight of the laminated heat exchanger can be reduced and the manufacturing cost can be reduced. it can. Further, since each extension portion is supported by the U-shaped member in cross section, the strength of the attachment portion of the attachment fitting is secured.

By the way, even if the mounting position of the laminated heat exchanger 1 is changed, the flat tubes 5, 7 and 9 having the extension portions formed at the ends thereof are located at the positions corresponding to the mounting positions. The flat tubes 5 to 9 are stacked and formed, and their extension portions 5a, 7a,
If the mounting brackets 12 (13) are provided on 7b and 9a, it is possible to easily deal with the change of the mounting position.
In this case, the same mounting bracket 12 (13) can be used if the intervals between the extension portions 5a and 7a of the flat tube where the mounting bracket 12 (13) is provided and the intervals between 7b and 9a are the same as before the change. , No need to manufacture many kinds of mounting brackets.

The mounting brackets 12 (13) are provided on both sides of the laminated heat exchanger 1 depending on the restrictions of the mounting location of the laminated heat exchanger 1 and the weight of the laminated heat exchanger 1. One piece may be provided, or only two pieces may be provided on one side surface. From the standpoint of mounting strength, it is desirable that the mounting bracket 12 (13) be provided between the two extension portions between 5a and 7a and between 7b and 9a as in the above-mentioned embodiment, but one flat tube or The L-shaped metal fittings 134 may be fixed to the extensions of two or more flat tubes. Further, the shape of the fitting 12 (13) may be a square cross-section.

The laminated heat exchanger according to the present invention can also be widely used as a heat exchanger for automobile radiators and the like.

[Brief description of drawings]

FIG. 1A is a front explanatory view of a laminated heat exchanger according to the present invention, and FIG. 1B is a perspective partial enlarged explanatory view of an extension portion of a flat tube.

FIG. 2A is a perspective explanatory view of a mounting bracket in which a mounting piece is formed on a U-shaped member in section, and FIG. 2B is a perspective explanatory view of a mounting bracket in which an L-shaped bracket is fixed to a U-shaped member in section. (C) is a perspective explanatory view of a case nut.

FIG. 3 is a front explanatory view of a conventional laminated heat exchanger.

4A is an explanatory plan view of FIG. 3, FIG. 4B is an explanatory view of a bottom surface, FIG. 4C is an explanatory view of a right side surface, and FIG. 4D is an enlarged perspective view of a flat tube end portion.

[Explanation of symbols]

1 ... Laminated heat exchanger, 5-9 ... Flat tubes, 5a, 7
a, 7b, 9a ... extension, 12 ... mounting bracket, 16 ...
・ Mounting bolts, 17 ・ ・ Nuts, 511 ・ ・ First bolt insertion hole, 121 ・ ・ C-shaped member in section, 122 ・ ・ Upper plate part, 123 ・ ・ Lower plate part, 124 ・ ・ Second bolt insertion Hole.

Claims (3)

[Claims] 1. A laminated heat exchanger that forms a fluid passage by a laminated structure in which a plurality of flat tubes formed by joining two bowl-shaped core plates at their outer peripheral edges are laminated, A laminated heat exchanger, characterized in that, among the flat tubes, an extension portion in which the fluid passage is not formed is formed at an end portion of a predetermined flat tube, and a fitting is provided in the extension portion. 2. The extension parts are respectively formed at ends of two flat tubes of the plurality of flat tubes, one extension part has a first plate-like part, and the other extension part has a second plate part. 2. The laminated heat exchanger according to claim 1, wherein mounting plates with which the plate-shaped portions of the stack abut each other are provided between the extension portions. 3. A first bolt insertion hole is formed in each of the extension portions of the two flat tubes, and a first plate-shaped portion and a second plate-shaped portion of the mounting member are provided with a first bolt-shaped hole. Two bolt insertion holes are respectively formed, a mounting bolt is inserted into the first bolt insertion hole and the second bolt insertion hole, and a nut is fastened to the tip of the mounting bolt. Item 2. The laminated heat exchanger according to item 2.