JPS61295492A - Heat exchanger - Google Patents

Abstract

PURPOSE:To make it possible to reduce the welded parts, to easily manufacture the heat exchanger at inexpensive cost and further to reduce the amount of leaked water by forming header parts so that they are integrally assembled on both right and left sides of each of first and second fluid flowpaths. CONSTITUTION:Oil flows through a first fluid flowpath A and air flows through a second fluid flowpath B. Both flowpaths A and B are disposed so that the fluids flow in a rectangularly intersecting manner, and on both right and left sides of the heat exchanger 1 header parts 2 and 2 are integrally formed. The first fluid flowpath A is formed by flat plates 3 and 3 disposed at both up and down sides and having fluid passage holes 4 and 4 at both right and left ends, a first fluid flowpath forming annular member 5 having outer peripheries of the substantially the same shape as the flat plate, and inner fins 6 made of an aluminum extrusion die material. The second fluid flowpath B is formed by flat plates 3 and 3 having fluid passage holes 4 and 4, a pair of spacers 7 and 7, and corrugated fins 8. Fluid passage holes 9 and 9 communicating with fluid passage holes 4 and 4 of up and down flat plates 3 and 3, are formed in both right and left spacers 7 and 7.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to a GI layer pear-shaped heat exchanger used, for example, in large oil coolers.

In this specification, aluminum is meant to include pure aluminum and aluminum alloys.

BACKGROUND OF THE INVENTION In recent years, aluminum laminated heat exchangers have been widely used as large oil coolers. In this heat exchanger, a first fluid flow path through which oil passes and a second fluid flow path through which air flows in a direction perpendicular to the first fluid flow path are separated by a flat plate and are arranged vertically alternately. However, in conventional heat exchangers, the tubes constituting the first fluid flow path and the fins housed in the second fluid flow path between the tubes are joined together by vacuum brazing, Other fluid introduction headers, discharge headers, fluid introduction pipes, discharge pipes, and the like have been manufactured by joining together, for example, by argon welding. However, such a conventional heat exchanger has a large number of welding points, and therefore manufacturing thereof is very troublesome and time-consuming, requires skill in welding, and has a high manufacturing cost. In addition, since there are many welding points, liquid leakage is likely to occur due to poor welding, and there is also the problem that so-called spatter (aluminum pieces) generated when welding headers etc. enters the heat exchanger, impairing the performance of the heat exchanger. Ta.

Purpose of the Invention The present invention solves the above-mentioned problems, and by forming the header part so as to be integrally incorporated on both the left and right sides of the first and second fluid flow paths, there are very few welded parts, and therefore the manufacturing process can be simplified. This can be done easily and inexpensively, there is very little chance of liquid leakage, there is no chance of foreign matter such as spatter getting into the container, and it has excellent pressure resistance. It is an object of the present invention to provide a heat exchanger that can be freely and extremely easily designed to form parallel flows or countercurrent flows, and that can improve heat exchange performance.

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a heat exchanger that alternately includes first fluid flow paths and second fluid flow paths that are separated by a flat plate and arranged orthogonally to each other. 1st
A flat plate in which a fluid flow path is disposed on both the upper and lower sides and has a fluid passage hole at both ends or a required end;
a flat plate which is arranged on both the upper and lower sides and has a fluid passage hole at both ends or a required end; The heat exchanger is formed by a pair of arranged spacers, and has a fluid passage hole in at least one of the left and right side lengths that communicates with fluid passage holes in both the upper and lower flat plates.

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

In this specification, front, back, left, right, and top and bottom are based on FIG. 6, and "front" refers to the front side of the paper sheet in FIG. 6, "back" refers to the back side, and "left" refers to the left side, right and refers to the right side of the figure, "top" refers to the upper side of the figure, and "bottom" refers to the lower side of the figure.

In FIGS. 1 to 7 showing the first embodiment of this invention,
The heat exchanger (1) according to the present invention is made of aluminum and is used, for example, as a large oil cooler. This heat exchanger (1) has a first fluid flow path (A) and a second fluid flow path (B) alternately in the vertical direction separated by a flat plate (3) made of an aluminum brazing sheet. ing. Oil flows through the first fluid flow path (A), and air flows through the second fluid flow path (B).Both flow paths (A)
(B) is arranged so that these fluids flow orthogonally. There are headers (2) on both the left and right sides of the heat exchanger (1).
) and (2) are formed so as to be integrated.

That is, as shown in FIGS. 3 and 5, a heat exchanger (1
) is a flat plate (3) arranged on both the upper and lower sides and having fluid passage holes (4) (4) at both left and right ends.
(3), and a first fluid flow path forming annular body (5) which is interposed between both flat plates (3) and (3) and has an outer periphery that is approximately the same shape and size as the flat plates (3) and (3). , inner fins (6) made of aluminum extrusion arranged inside the annular body (5).
).

The second fluid flow path (B) is a flat plate (3) (3) disposed on both the upper and lower sides and having fluid passage holes (4) (4) at both left and right ends.
), a pair of spacers (7) (7) placed on both left and right sides between both flat plates (3) (3), and a corrugated fin placed between both spacers (7) (7). (8) and left and right spacers (7) (
7), the fluid passage holes <4) of both the upper and lower flat plates (3) (3)
4) are provided with fluid passage holes (9) (9) communicating therewith. Therefore, the left and right header parts (2) (2) are flat plates (
3), the fluid passage holes (4) (4) at both left and right ends, the left and right end portions of the first fluid flow path forming annular body (5) without the inner fins (6), and the spacers (7) (7). ) are formed by the fluid passage holes (9) and (9).

Here, the inner fluid contained in the first fluid flow path (A)
The fin (6) is made of an extruded aluminum material and is composed of a flat play part (6a) and a large number of parallel convex parts (6b) provided orthogonally on both the upper and lower surfaces of the flat play part (6a). . Also, inside the second fluid flow path (B) are a pair of upper and lower so-called multi-entry corrugated fins (8).
(8') are arranged, and these fins (8) (8) are joined by intermediate plays 1 to (10) made of aluminum brazing sheets interposed between them.

First and second fluid flow paths (A) (B) of heat exchanger (1°)
) has the above structure except for the upper and lower end portions of the heat exchanger (1). In this example, a heat exchanger (1
) are connected to the left and right ends of the upper surface of the fluid inlet pipe (11) and the fluid discharge pipe (12), and the lower surface thereof is closed, so that the upper and lower ends have the following configuration. First of all, in the upper end part, as shown in Fig. 2, there are fluid passage holes (
14) A surface plate (13) made of a relatively thick aluminum plate having (14), and an aluminum brazing sheet disposed below this and having fluid passage holes (4) (4,) at both ends. A flat plate (3) (3) consisting of
A pair of left and right spacers (7) (7) to the right of the fluid passage holes (9) (9), respectively, and a corrugated fin (1) placed between the spacers (7) (7). 8), a second fluid flow path (B) is formed. next,
At the lower end of the heat exchanger (1), there is a relatively thick surface plate (13) with no fluid passage holes (not shown in Fig. 4), and a relatively thick surface plate (13) with no fluid passage holes, and a surface plate (13) with a relatively thick surface having no fluid passage holes, and a surface plate (13) with a relatively thick surface having no fluid passage holes at both ends. A flat plate (3) < 3) made of an aluminum brazing sheet that does not have a passage hole, a pair of left and right spacers (7) (7) that also do not have a fluid passage hole, and both spacers (7). )
A second fluid flow path (B) is formed by one sheet of Korgoo 1 to fins (8) arranged in the middle of (7). A pair of short ducts (15) (15) are attached to both the front and rear sides of the heat exchanger (1) so as to surround the outer periphery of all the second fluid flow paths (B).

The heat exchanger (1) is made of aluminum brazing.
Flat plates (3) (3) made of sheets, an annular body (5) for forming a first fluid flow path, inner fins (6), spacers (7) (7), and corrugated fins (8) ( 8), intermediate plate (10), and both upper and lower surface plates (13) (
13) are arranged in a polymerized state and joined together by, for example, vacuum brazing.

Note that in this embodiment, an aluminum brazing sheet is used as the flat plate (3), but the invention is not limited to this; an aluminum plate can be used as the flat plate (3), and the first fluid Annular body for flow path formation (5
) and spacer 9 (7), etc., and form a brazing filler metal layer on the required upper and lower surfaces of the heat exchanger component members by coating, etc., respectively, and bond the entire heat exchanger (1) with this brazing filler metal layer. It is also possible to do so.

In the heat exchanger (1), oil is introduced, for example, from the left fluid introduction pipe (11). Oil flows from the left header section (2) through all the first fluid channels (A>) in parallel flow, and from the right header section (2), the oil flows through the fluid discharge pipe (A).
12). On the other hand, air is passed through the second fluid flow path (B) by forced airflow by a fan or by natural ventilation caused by running a vehicle or the like.

Such a heat exchanger (1) is used as an oil cooler, for example, to cool engine oil, industrial machinery, or oil in various hydraulic systems.

FIG. 8 shows a second embodiment of the invention. Here, the difference from the first embodiment is that the direction of flow changes in units of two first fluid channels (A), so that the fluid moves in a meandering manner. Therefore, in the part where the direction of flow changes, the end of the flat plate (3) is closed and has no fluid passage hole, and the plate (4) is similarly used without a fluid passage hole.

The other points of this second embodiment are the same as those of the first embodiment, and the same parts are given the same reference numerals in the drawings.

In each of the above embodiments, a so-called horizontal oil cooler in which the first fluid flow path (A) is arranged horizontally is shown, but in this invention, the first fluid flow path (A) is arranged vertically. The same applies to vertical oil coolers.

Furthermore, the heat exchanger according to the present invention is applicable not only to oil coolers but also to various heat exchangers that perform multiple types of heat exchange with gas and fluid.

Effects of the Invention As described above, the present invention is provided with alternating first fluid channels (A) and second fluid channels (B) separated by the flat plate (3) and arranged orthogonally to each other. In the heat exchanger,
A flat plate (3) (3) in which the first fluid flow path (A>) is arranged on both the upper and lower sides and has a fluid passage hole (4) at both ends or a required end; The second fluid flow path (B) is formed by a first fluid flow path forming annular body (5) interposed between the flat plates (3) and having an outer circumference of approximately the same shape and size as the flat plates (3). A flat plate (
3) It is formed by (3) and a pair of spacers (7) (7) arranged on both left and right sides between both flat plates (3) (3), and at least of the left and right cylindrical spacers (7) (7). One is the fluid passage hole (4) in both the upper and lower flat plates (3) (3).
(4) has a fluid passage hole (9) that communicates with the header part (2) connected to the first and second fluid passages (A).
Since it is formed so as to be integrated into both the left and right sides of (B), there are very few welded parts and the number of production steps is reduced, making it easy and inexpensive to manufacture and preventing liquid leakage. Very rarely occurs. In addition, there is no possibility of foreign matter such as spatter getting into the container, and since it is a laminated type, it has excellent pressure resistance. Moreover, by appropriately arranging the flat plate (3) with the required fluid passage hole at one end closed and the spacer (7) without the fluid passage hole, the heat exchanger (1) can be The flow path (A) can be freely and extremely easily designed to form a parallel flow or a countercurrent flow, and the heat exchange performance can be improved.

[Brief explanation of drawings]

The drawings show two embodiments of the present invention. Fig. 1 is a partially omitted perspective view of the heat exchanger of the first embodiment, and Fig. 2 is a partially omitted perspective view of the heat exchanger of the first embodiment.
An exploded perspective view showing the flow path configuration of the upper end portion of the heat exchanger shown in the figure.
FIG. 3 is an exploded perspective view showing the flow path configuration in the middle portion, FIG. 4 is an exploded perspective view showing the flow path configuration in the lower end portion, FIG. 5 is an enlarged perspective view of the main part of FIG. 1, and FIG. 6 7 is a front view of the heat exchanger to which fluid introduction/discharge pipes and ducts 1 to 1 are attached, and FIG. 7 is a left side view of the same. FIG. 8 is a sectional view of the heat exchanger of the second embodiment. (1)...Heat exchanger, (2)...Header section, (A)
...First fluid flow path, <8) ...Second fluid flow path, (3
)... Flat plate, (4) (9) (14)... Fluid passage hole, (5)... Annular body for forming first fluid flow path, (6)
...Inner fin, (7) ...Spacer, (8
)...Korgoo l~・Fin, (13)...Surface plate. Figure 2 Figure 3

Claims (1)

[Claims] In a heat exchanger provided with alternating first fluid passages (A) and second fluid passages (B) separated by a flat plate (3) and arranged orthogonally to each other, the first fluid passage (A ) are arranged on both the upper and lower sides and have fluid passage holes (4) at both ends or a required end;
) (3) A first fluid flow path forming annular body (5
), and the second fluid flow path (B) is arranged on both the upper and lower sides and has a fluid passage hole (4) at both ends or a required end. 3)
(3) It is formed by a pair of spacers (7) (7) arranged on both left and right sides between the comrades, and at least one of the left and right spacers (7) (7) is provided with both upper and lower flat plates (3).
A heat exchanger having a fluid passage hole (9) communicating with the fluid passage hole (4) (4) of (3).