JPS61128092A - Heat exchanger - Google Patents

Abstract

PURPOSE:To prevent choking of a heat exchanger and to reduce production of oil resistance, by a method wherein plural undulating parts are formed on an upper and a lower plate, the rising parts or the falling parts of the undulat ing parts, positioned facing each other, are brought into contact with each other, and the upper and the lower plate are alternately laminated. CONSTITUTION:The title device has an upper plate 1 and a lower plate 2, which are formed by a good thermal conductor and are formed such that the plate has an undulating part F located in an elevated level than that of a plate part A of the plate, and plural undulating parts F formed along the former undulating part F, and the undulating parts F are positioned flush with each other. The upper plate 1 and the lower plate 2 are brought into contact with each other so that the positions of the rising or the falling parts of the undulating part F are located facing each other to form a first unit 3 in which first spaces P are formed separatedly from each other. The spots, positioned facing each other, of the units 3 are superposed with each other to laminate the plural units to form second spaces Q which are alternately separated.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a heat exchanger, and is used, for example, in an oil cooler that cools engine oil by exchanging heat between engine oil and engine cooling water of an automobile engine. It is valid.

[Conventional technology]

Conventionally, this type of oil cooler was the Utility Model 59-282.
There are known filters that are interposed between the engine block and the oil filter to cool the oil, such as the one described in Japanese Patent No. 19. However, this type of oil cooler passes through the oil cooler before flowing to the oil filter.
Because the oil has inner fins built in to improve heat exchange performance, there were problems such as clogging when passing through the inner fins and increased resistance to oil passage, which had a negative impact on engine durability.

[Problem that the invention seeks to solve]

The problem to be solved by the present invention was devised in view of the above-mentioned problems, and is to reduce clogging and oil flow resistance of a heat exchanger, and to make it possible to manufacture the heat exchanger at low cost.

[Means for solving problems]

As a means for solving the above problems, the present invention provides a heat exchanger for exchanging heat between two fluids, which is made of a good thermal conductor and is one step higher than the plate part (A) of the plate. an undulating part (F), and a plurality of undulating parts (F) formed along the undulating part (F); The first space (P ) isolating unit (3)
A heat exchanger 111 characterized in that a plurality of units (3) corresponding to each other are overlapped and laminated to form second spaces (Q) in alternating isolation! vessel.

〔Example〕

Embodiments of the present invention will be described below based on the drawings.

FIG. 1 to FIG. 6 show an embodiment of an oil cooler for an internal combustion engine according to the present invention.

The basic configuration of this oil cooler is a so-called Dron cup type, in which a plurality of units 7) 3 are laminated by combining an upper plate 1 and a lower plate 2 made of a good thermal conductor (e.g. stainless steel material) with the same shape and wall thickness. It is something.

In the following description, the common parts of the upper plate 1 and the lower plate 1, for example, plate portions A(1) and A(2), will be described with numbers attached to each plate.

Each of the upper plate 1 and the lower plate 2 has a tongue-like outline, and the outer peripheral parts B(1) and B(2) that follow the outline are plate parts A(1).
・It is a stepped surface bent one step higher than A(2). Outer peripheral portions B(1) and B(2) of plate portions A(1) and A(2)
On the closer side, the first and second openings C (1) of the upper plate 1
(1) 2. First and second openings C of lower plate 2 (2) I
-C(2) 2 is provided, and the outer periphery of the opening C(2)C(2)2 of the lower plate 2 is connected to the upper plate as described later.
, when the lower plates 2 are stacked alternately, the opening C (1
) It is formed so as to protrude downward by approximately the thickness so as to fit with the C(1)2.

In addition, the first and second openings C(1)+ and C(1)C(2
)+ and C(2) 20 plate parts A(1) and A(2
) has a linear protrusion blocking part E that extends continuously from the outer circumferential parts B(1) and B(2) to the central through holes D(1) and D(2).
(1)・E(2) (the plate part A(1)・A(2)
) is formed, which is one step higher than ).

Relatively large diameter through holes D(1) and D(2) are formed in the center of the plate portions A(1) and A(2), and these through holes D(1) and D( 2) is formed with a bent portion 4.5 having an L-shaped cross section and extending continuously around the unit 3 and protruding in the vertical direction corresponding to the thickness of the unit 3. In addition, when combining the unit 3 with the upper plate 1 and lower plate 2 as described later, the through hole D (1) of the upper plate 1 and the through hole D of the lower plate 2
(2) The inner diameter of the through hole D(1) of the upper plate 1 is larger than that of the through hole D(2) by approximately equivalent to the wall thickness so that the through hole D(1) can fit therein.

Plate portion A(1) on the outer periphery of through holes D(1) and D(2).
A(2) has a plurality of annular undulations 2 that are one step higher than the plate portions A(1) and A(2), and portions F(1) and F(
2) are formed concentrically surrounding the through holes D(1) and D(2).

These undulating portions F(1) and F(2) are not a series of annular shapes, but have a C-shape with a part thereof missing, and the missing portion has the above-mentioned closed portions E(1) and E. (2) is provided. Further, the width and interval of each undulating portion F(1) and F(2) are the same. In addition, plate parts A(1) and A(2)
The first and second openings C(1) I-C(1)2, C(2), are located near the outer peripheral portions B(1) and B(2) of
C(2) A protrusion G(
1) and G(2) are formed, and on the periphery of the outer periphery B(2) of the lower plate 1, there is a flange in the shape of a cross-section that protrudes vertically upward and continues around the periphery. A portion 6 is formed.

On the other hand, plate portion A(1) of such upper plate 1 and lower plate 2
・The upper surface of the convex portion formed on A(2), that is, the outer peripheral portion B(
1)・B (2), Occlusion part E (1)・E (2),
Annular undulations F(1), F(2), protrusion G(1)
・The upper surfaces of G(2) are at the same height and on the same plane, and the upper surfaces of each are flat, and as described later, multiple units 3 are stacked by combining the upper plate 1 and the lower plate 2. In this case, each of the above-mentioned components is configured to abut correspondingly.

In addition, the plurality of annular undulating parts F(1) and F(2) have a C-shape as described above, and each end has a flat surface of the undulating part F(1) and F(2). Oval third openings H(1) and H(2) narrower than the width of the openings H(1) and H(2) are formed. Also, in the center of the two ends, there are undulating parts F(1) and F(2).
The fourth oval opening K(1) and K(2
) is perforated. Further, the third opening H(1)
- The length of the oval shape of H(2) and the fourth opening K(1) and K(2) is longer on the outer side than on the inner annular undulating part.

Next, the process of laminating the upper plate 1 and the lower plate 2 will be explained.

The upper plate 1 and the lower plate 2 are arranged so that the lower plate 2 is at the lower end as shown in FIG. 1 or 4, and the outer periphery of the upper slope 1 and lower plate 2 is , occlusion part E(1)・
E (2), the annular undulating portions F(1) and F(2), and the protrusions G(1) and G(2) are brought into contact with the respective corresponding portions, and the through holes D(1) and D(2) are made into contact with each other. ) to assemble unit 3. Align the parts corresponding to the positions of the upper plate 1 and lower plate 2 of the unit 3 assembled in this way and open each opening C(1) and C(2)Is.C(1)2 and C(2)2 are fitted. Then, H(1) and H(2), K (
1) and K(2) are aligned and multiple units/t3
Laminate. The upper plate 1' that closes the fourth opening K(1) is attached to the upper plate of the uppermost unit 3', and the lower plate of the lowermost unit 3'' has the first and second openings closed. C(2)
Attach the lower plate 2' which closes +.C(2) and also closes the third opening H(2).

Furthermore, a ring folding member 6 having a shape corresponding to the annular undulating portions F(1) and F(2) and having a plurality of outlet ports 5 is attached to the upper surface of the uppermost unit 3'. On the bottom surface of unit 3″ is the annular undulating portion F (1).
, F (2), and a ring member 8 formed with a plurality of inlet ports 7 arranged on the same circumference.
And the seat plate 9 is attached. The ring member 6 is formed with a small hole 5a corresponding to the third opening H(2) of the innermost annular undulating portion F(1). In addition, the seat plate 9
A plurality of holding parts 10 are formed on the lower surface of the inlet port 7 by partially cutting and raising the outer peripheral part of the periphery of the inlet port 7 and bending it in the outer peripheral direction. It is for the purpose of This 0 ring 11 is
The refraction retaining portion 10 is formed integrally with an outer circular cross-sectional portion 11a and a relatively thin walled portion 11b located inside the outer portion 11a. 11b is held.

Brazing plates are interposed between the components of the oil cooler stacked as described above, and are brazed together in a vacuum furnace.

As a result, the first and second spaces PSP are isolated from each other and outside by the upper plate 1 and the lower plate 2.
, QSQ... are formed alternately like a honeycomb.

The first plate is isolated in the unit 3 by the upper plate 1 and the lower plate 2.
The spaces P, P... are the first and second openings C (1
)+・C(2)+ and C(1)2・C(2)2, and the first opening C(1)l and the second opening C(1)2 at the top step A pipe 12, 12' is installed above it, through which cooling water is introduced and discharged. Therefore, the introduced cooling water flows from the first opening C(1)+ to the first space P.
As shown by the dotted line arrows in Figure 7, the water flows inside each unit 3 in multiple streams along the annular undulations F (1) and F (2), and then flows out from the discharge pipe. derived.

In addition, the second spaces Q, Q, which are separated from each other by the unit 3, that is, formed by the annular undulating parts F(1) and F(2), are the annular undulating parts F of each plate 1.2. (1)・
Third opening H(1) and H(2) formed in F(2)
and communicate through fourth openings K(1) and K(2). Therefore, the warmed oil used for lubricating the internal combustion engine, etc. is transferred to the lower ring member 8 and the inlet boat 7 of the seat plate 9.
from the fourth opening K of the lowest unit 3#.
(2) and is led to the second space Q, Q..., and the seventh
As shown by the solid line arrows in the figure, the flow branches from the opening K(2) to the left and right and flows along each of the annular undulations F(1) and F(2),
After flowing upward through the third openings H(1) and H(2), it is introduced into the oil filter installed above this oil cooler through the outlet port 5.5a of the upper ring member 6. .

After the dust has been removed, the through hole D (1) is used to attach the oil cooler and oil filter to the engine block.
It is supplied to the internal combustion engine through an in-bolt passage 14 formed in a through-bolt 13 provided to penetrate D(2).

Here, the first space PSP through which the cooling water passes and the second spaces Q, Q through which the oil passes are adjacent to each other with the upper plate l or the lower plate 1 in between, as described above. Therefore, heat is exchanged while flowing through each space PSQ, and the oil is cooled and led out from the bolt passage 14 of the through bolt 13, and the water takes heat from the oil and is led out from the pipe 12. will be done.

In the above embodiment, each plate has an annular undulating portion F(1).
By forming F(2), the space P through which the oil passes
Although the space through which the water passes is isolated, it goes without saying that the shape of the space may be linear, wavy, rectangular, etc. in addition to the annular shape described above. The third space is guided into the second space Q through the opening K(1).
The third openings H(1) and H(2) in two positions are derived by closing the fourth openings K(1) and K(2). ) may be introduced from one side and derived from the other.

Multiple undulations F(1) and F formed on each plate 1.2
(2) The width and spacing were the same in the above embodiment, but the width, spacing, and number of undulations should be changed as appropriate to maximize the heat exchange efficiency between the cooling water and oil. would be easy for those skilled in the art.

Moreover, the noteworthy point of the present invention is that the plurality of undulating portions F(1)
・When forming F(2) on plate 1.2, it is possible only by press working, and when stacking the upper plate 1 and lower plate 2 alternately as described above, the upper Fi1 and lower In addition to the plate 2, parts such as rings are not required. Furthermore, the configuration does not include inner fins that are conventionally provided between each plate 1.2 to improve heat exchange efficiency. For this reason, the oil cooler of the present invention is effective in terms of cost. In addition, since the structure is such that the upper plate 1 and the lower plate 2, on which a plurality of undulations BF (1) and F (2) are formed, are alternately Mtr5, the load in the laminated direction (!!! direction) is reduced by the undulations. Part F (
1) Since it is supported by F (Z), its strength against loads in the axial direction is improved.

〔Effect of the invention〕

The present invention forms a plurality of undulations on the upper and lower plates, and
The top,
By alternately stacking the lower plates, a first space through which the fluid to be cooled and a second space through which the cooling fluid flows are formed isolated, and heat is exchanged between the two fluids. Therefore, it has the following excellent effects.

a) With the above configuration, there is no need to provide the conventionally provided inner fins.

Therefore, the conventional problems of clogging of the inner fin and increase in oil flow resistance are solved.

b) The plurality of undulations can be easily formed by press working, and inner fins or other parts (rings, etc.) can be eliminated, which is effective in terms of cost.

C) Since the load applied in the stacking direction of the upper and lower plates is supported by the above-mentioned undulations, the load resistance is improved when fixing the heat exchanger of the present invention to the engine housing with bolts etc. that penetrate in the stacking direction. do.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a heat exchanger showing an embodiment of the present invention, and FIG. 2 is a view showing the upper plate 1 (Ml is a plan view, and the mountain) is along the line A-A in (a). A cross-sectional view along the line, Figure 3 is the lower plate 2
(al is a plan view, (b) is a cross-sectional view along line B-B in fat, FIG. 4 is a cross-sectional view showing the laminated state of upper plate 1 and lower plate 2, and FIG. 5 is 1, FIG. 6 is a view from the top of FIG. 1, and FIGS. 7 and 8 are a schematic plan view and a schematic sectional view, respectively, to show the flow of fluid. 1. ...Top plate, 2...Bottom plate, 3...Unit, 5.
・・Outlet port, 7・・Inlet port 12.12'・
··pipe. A...Plate part, CII c12...11th second opening 1H...Third opening, K...Fourth opening,
P...first space, Q...second space.

Claims (3)

[Claims] (1) In a heat exchanger for exchanging heat between two fluids, an undulating part (F) made of a good thermal conductor and raised one step higher than the plate part (A) of the plate; and this undulating part (
It has a plurality of undulating parts (F) formed along F),
It consists of an upper plate (1) and a lower plate (2) with the undulating part (F) being on the same plane, and the upper plate (1) and the lower plate (2) are arranged so that the undulating part (F) is on the same plane. A unit (3) whose respective positions correspond to each other to form an isolated first space (P), and a plurality of units (3) that are stacked and stacked in corresponding positions are overlapped to form a second space (P). A heat exchanger characterized by alternately forming isolated spaces (Q). (2) The upper surface of each of the plurality of undulating parts (F) formed on the upper plate (1) and the lower plate (2) is a plane, and each of the planes has two openings (H, K). It is perforated,
The second space is electrically connected through the openings (H, K),
One opening (K) communicates with an inlet port (7) that communicates with the outside and introduces fluid, and the other opening (H)
A heat exchanger according to claim 1, characterized in that the outlet port (5) communicates with the outside and communicates with an outlet port (5) for discharging fluid. (3) Plate portion (A) of the above upper plate (1) and lower plate (2)
are each flat, and each of the plate portions has two
Two openings (C_1, C_2) are formed, through which the first space (P) communicates, and one opening (C_1) communicates with the outside to allow fluid to flow through the openings (C_1, C_2). The heat exchanger according to claim 2, characterized in that the other opening (C_2) communicates with the outside and discharges the fluid.