JPH0443739Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field This invention relates to a laminated heat exchanger used, for example, in large oil coolers.

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

BACKGROUND ART In recent years, aluminum stacked heat exchangers have been widely used as large oil coolers. This heat exchanger includes a first fluid flow path through which oil passes;
On the other hand, the second fluid flow path through which air flows in the orthogonal direction is separated by a flat plate and arranged alternately above and below, but in conventional heat exchangers, the first fluid flow path is and a fin housed in a second fluid flow path between the tubes,
They are manufactured by being joined together by vacuum brazing, and other fluid introduction headers, discharge headers, fluid introduction pipes, discharge pipes, etc. are joined by, for example, argon welding.

Problems that the invention aims to solve However, in such conventional heat exchangers, there are a large number of welding points, and therefore manufacturing is troublesome, time-consuming, requires skill in welding, and manufacturing costs are high. Ta. 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. enter the heat exchanger, impairing the performance of the heat exchanger. It was hot.

The purpose of this invention is to solve the above-mentioned problems of the prior art, and by forming the header portions so as to be integrally incorporated on both the left and right sides of the first and second fluid flow paths, the number of welded parts is extremely small. In addition to being easy and inexpensive to manufacture, there is very little chance of liquid leakage, and there is no chance of foreign objects such as spatter getting into the container.
The object of the present invention is to provide a heat exchanger that has excellent pressure resistance, improved heat exchange performance, and can be downsized.

Means for Solving the Problems In order to achieve the above object, this invention alternately includes first fluid flow channels and second fluid flow channels that are separated by a flat plate and arranged orthogonally to each other. 1. A flat plate in which a fluid passage is disposed on both the upper and lower sides and has a fluid passage hole at both ends or a required end; A second fluid flow path is formed by a flat plate disposed on both upper and lower sides and having fluid passage holes at both ends or a required end, and a second fluid flow path is formed by a flat plate having a fluid passage hole at both ends or a required end. a pair of spacers arranged on both sides, at least one of the left and right spacers,
The heat exchanger has a fluid passage hole that communicates with fluid passage holes in both the upper and lower flat plates, and an inner fin is housed in the first fluid passage, and this inner fin connects the left and right side walls and these. The material is an extruded aluminum material consisting of connecting flat horizontal walls. Arch-shaped projections are integrally provided on the horizontal walls in a vertically protruding manner, and fluid passage holes are provided in the horizontal walls so as to face each arch-shaped projection. The main focus is on heat exchangers, which have holes in them.

Effects According to the above heat exchanger, since the header portions are formed to be integrated into both the left and right sides of the first and second fluid flow paths, there are very few welded parts.
Therefore, it is easy to manufacture and has excellent pressure resistance, and in particular, the inner fin housed in the first fluid flow path is made of extruded aluminum consisting of left and right side walls and a flat horizontal wall connecting these. Since the shape material is used as a material and arch-shaped protrusions are integrally provided on the horizontal wall thereof in a vertically protruding manner, the strength of both sides of the inner fin is improved, and the withstand pressure of the first fluid passage is improved.

Embodiment An embodiment of this invention will be described below based on the drawings.

In this specification, front and back, left and right, and top and bottom are based on FIG. 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 the drawing, a heat exchanger 1 according to the invention is made of aluminum and is used, for example, as a large oil cooler. This heat exchanger 1 consists of a flat plate 3 made of an aluminum brazing sheet.
The first fluid flow path A and the second fluid flow path B are alternately separated in the vertical direction. Oil flows through the first fluid flow path A, and air flows through the second fluid flow path B. Both passages A and B are arranged so that these fluids flow orthogonally. Headers 2, 2 are formed on both left and right sides of the heat exchanger 1 so as to be integrated therein.

That is, the first fluid flow path A of the heat exchanger 1 is interposed between flat plates 3, 3 which are arranged on both the upper and lower sides and have fluid passage holes 4, 4 at both left and right ends, and both flat plates 3, 3. It is formed by a first fluid flow path forming annular body 5 having an outer circumference of approximately the same shape and size as the flat plates 3, 3, and an inner fin 6 made of an extruded aluminum material disposed inside the annular body 5. has been done. The second fluid flow path B includes a flat plate 3 disposed on both the upper and lower sides and having fluid passage holes 4, 4 on both left and right sides;
3, a pair of spacers 7, 7 arranged on both left and right sides between both flat plates 3, 3, and a corrugated fin 8 arranged between both spacers 7, 7, Both spacers 7, 7
Fluid passage holes 9, 9 communicating with the fluid passage holes 4, 4 of both the upper and lower flat plates 3, 3 are bored in the upper and lower flat plates 3, 3. Therefore, the left and right header portions 2, 2 are connected to the fluid passage holes 4, 4 at both the left and right ends of the flat plate 3, the left and right end portions of the first fluid flow path forming annular body 5 without the inner fin 6, and the spacer. 7, 7 and fluid passage holes 9, 9.

Here, the inner fin 6 housed in the first fluid flow path A is made of an extruded aluminum material, and has left and right side walls 11, 11.
and a horizontal wall 1 connecting these side walls 11, 11.
2, and a large number of bent band-shaped projections 13 provided in a vertically projecting manner, that is, arch-shaped projections 13 when viewed from the side, and fluid passage holes 14 are provided in the horizontal wall 12 so as to face each of the arch-shaped projections 13. It is open.

Here, in the large number of arch-shaped protrusions 13, downwardly protruding protrusions 13a having a Λ-shaped cross section and downward protruding protrusions 13b having a V-shaped cross-section are arranged alternately in the left-right direction and the front-rear direction, and each arch-shaped The longitudinal direction of the protrusions 13a, 13b is parallel to the oil flow direction of the first fluid flow path A. The arrangement of the arch-shaped protrusions 13a and 13b is not limited to that shown in the drawings, but may be arbitrary, and the cross-sectional shapes of these protrusions 13 may be (Q)-shaped, (Q)-shaped, or
It may be (Q) type, (Q) type, etc. A fluid passage hole 14 facing each arched protrusion 13
It communicates with the openings on both the left and right sides of the protrusion 13, so that oil can easily flow in from both the left and right sides of the protrusion 13.

The inner fin 6 has left and right side walls 11,1
A large number of arch-shaped projections 13 are integrally formed on the horizontal wall 12 by press working or molding using a forming roll. It is manufactured by forming the same number of fluid passage holes 14 at the same time. Therefore, since the large number of protrusions 13 are formed by being cut and raised by the flat horizontal wall 12, less material can be used, and as a result, the weight of the heat exchanger 1 can be reduced.

In addition, the strength of both sides of the inner fin 6 has been improved,
The pressure resistance of the first fluid flow path A is improved.

In addition, a pair of upper and lower so-called multi-entry corrugated fins 8, 8 are arranged in the second fluid flow path B, and these fins 8, 8 are interposed between an intermediate plate made of an aluminum brazing sheet. 10.

A surface plate 15 made of a relatively thick aluminum plate having fluid passage holes 16 at both left and right ends is disposed at the upper end of the heat exchanger 1, and a relatively thick aluminum plate having no fluid passage holes at the lower end is disposed at the upper end of the heat exchanger 1. A meat surface plate (not shown) is arranged.

The heat exchanger 1 includes flat plates 3, 3 made of aluminum brazing sheets, an annular body 5 for forming a first fluid flow path, inner fins 6, spacers 7, 7, and corrugated fins 8, 8. It can be manufactured by arranging the intermediate plate 10 and the upper and lower surface plates 15 in a superimposed state and joining them together by, for example, vacuum brazing.

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 this flat plate 3 and the annular body for forming the first fluid flow path It is also possible to form a brazing material layer on the required upper and lower surfaces of heat exchanger component members such as 5 and spacer 7 by brush coating or the like, and to join the entire heat exchanger 1 with this brazing material layer. It is.

In the heat exchanger 1, oil is introduced, for example, from the left header portion 2. The oil moves from the left header section 2 through all the first fluid flow paths A in a parallel flow and is discharged from the right header section 2.
On the other hand, air is allowed to pass through the second fluid flow path B by forced ventilation by a fan or by natural ventilation caused by running a vehicle or the like. When oil flows in the first fluid flow path A, the oil comes into contact with a large number of arch-shaped protrusions 13 with Λ-shaped and V-shaped cross sections provided on the horizontal wall 12 of the inner fin 6, and the upper side has a Λ-shaped cross section. Oil flows downward into the fluid passage hole 14 from the left and right sides of the arch-shaped protrusion 13a, and conversely, oil flows into the fluid passage hole 14 from the left and right sides of the lower arch-shaped protrusion 13b with a V-shaped cross section. By flowing in as an upward flow, the flow of the oil is eventually disturbed and the oil moves through the first fluid flow path A while being sufficiently stirred, thereby greatly increasing the heat exchange efficiency.

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.

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 this invention is a vertical type oil cooler in which the first fluid flow path A is arranged vertically. The same applies to oil coolers. Furthermore, the heat exchanger according to this 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, this invention alternately includes a first fluid flow path and a second fluid flow path that are separated by a flat plate and arranged orthogonally to each other, and the first fluid flow path is
a flat plate disposed on both the upper and lower sides and having fluid passage holes at both ends or a required end; and a first annular shape for forming a fluid flow path interposed between the flat plates and having an outer periphery of approximately the same shape and size as the flat plate. a flat plate formed by a body, with second fluid passages disposed on both upper and lower sides and having fluid passage holes at both ends or a required end; and a pair of flat plates disposed on both left and right sides between the flat plates. A heat exchanger in which at least one of the left and right spacers has a fluid passage hole that communicates with the fluid passage holes in the upper and lower flat plates, the heat exchanger having a fluid passage hole in at least one of the left and right spacers, the heat exchanger having a fluid passage hole that communicates with the fluid passage hole in the upper and lower flat plates, The inner fin is made of an extruded aluminum material consisting of left and right side walls and a flat horizontal wall connecting these, and arch-shaped protrusions are integrally provided on the horizontal wall in a vertically protruding manner. According to the heat exchanger of this invention, a fluid passage hole is formed in the horizontal wall so as to face each of the arch-shaped protrusions.
Since it is formed to be integrated into both the left and right sides of the fluid flow path, there are very few welded parts, so it is easy to manufacture and has excellent pressure resistance, especially in the second fluid flow path. The housed inner fin is made of an extruded aluminum material consisting of left and right side walls and a flat horizontal wall connecting these, and arch-shaped projections are integrally provided on the horizontal walls in a vertically protruding manner. Therefore, the strength of both sides of the inner fin is improved, and the pressure resistance of the first fluid flow path is improved.

In addition, since the header parts are integrated on both the left and right sides of the first and second fluid flow paths, there is very little chance of liquid leakage, and foreign objects such as spatter during welding will not get into the vessel. There is nothing like that. Furthermore, the inner fin housed in the first fluid flow path is provided with a large number of arch-shaped protrusions, and a fluid passage hole is opened so as to face each arch-shaped protrusion, so that fluid such as oil, etc. The fluid moves through the first fluid flow path while its flow is disturbed and sufficiently stirred, thereby greatly increasing the heat exchange performance, and a flat plate having a required fluid passage hole at one end blocked; By appropriately arranging spacers without fluid passage holes, the heat exchanger can be freely and extremely easily designed so that the first fluid flow paths thereof form parallel flows or counterflows. The heat exchange performance can be improved, and the heat exchanger can therefore be made smaller.

[Brief explanation of drawings]

The drawings show an embodiment of this invention: Fig. 1 is a partial perspective view of a heat exchanger, Fig. 2 is an exploded perspective view showing the flow path configuration in the middle part of the heat exchanger, and Fig. 3 is a heat exchanger. A partially enlarged sectional view of the vessel, Figure 4 is the same as Figure 3.
An enlarged cross-sectional view along the line, FIG. 5 is the − of FIG.
FIG. 3 is an enlarged cross-sectional view taken along the line. 1...Heat exchanger, 2...Header part, A...1st
Fluid channel, B...second fluid channel, 3...flat plate,
4, 9, 14...Fluid passage hole, 5...Annular body for forming a first fluid flow path, 6...Inner fin, 7...
...Spacer, 8...Corrugate fin, 11...
...Left and right side walls, 12...Horizontal wall, 13...Archid projection.

Claims (1)

[Scope of utility model registration request] The first fluid flow path A and the second fluid flow path B are alternately separated by a flat plate 3 and arranged orthogonally to each other, and the first fluid flow path A is arranged on both the upper and lower sides and at both ends or as required. Fluid passage hole 4 at one end of
and a first fluid flow path forming annular body 5 which is interposed between the flat plates 3, 3 and has an outer circumference of approximately the same shape and size as the flat plates 3, 3. , the second fluid flow path B is arranged on both the left and right sides between the flat plates 3, 3, which are arranged on both the upper and lower sides and have fluid passage holes 4 at both ends or a required one end. A pair of spacers 7, 7
A heat exchanger in which at least one of the left and right spacers 7, 7 is provided with a fluid passage hole 9 that communicates with the fluid passage holes 4, 4 of the upper and lower flat plates 3, 3. , an inner fin 6 is housed in the first fluid flow path A, and this inner fin 6 is
An extruded aluminum material consisting of left and right side walls 11, 11 and a horizontal wall 12 connecting these is used as a material, and a large number of arch-shaped protrusions 1 are formed on the horizontal wall 12.
3 are integrally provided in a vertically protruding manner, and the horizontal wall 1
2, a heat exchanger is provided with a fluid passage hole 14 formed so as to face each arch-shaped protrusion 13.