JPH0583838B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to a stacked 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 perpendicularly to the first fluid flow path are separated by a flat plate and are arranged vertically alternately. However, in conventional heat exchangers, the tubes forming the first fluid flow path and the fins housed in the second fluid flow path between the tubes are integrally joined by vacuum brazing. , other fluid introduction headers, discharge headers, fluid introduction pipes, discharge pipes, etc. have been manufactured by joining, for example, by argon welding.

Problems to be Solved by the Invention However, in such conventional heat exchangers, there are a large number of welding points, and therefore manufacturing thereof is extremely troublesome and time-consuming, requires skill in welding, and manufacturing costs are high. It was expensive. 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.

It is an object of the present invention to solve the above-mentioned problems of the prior art, and to allow a plurality of fluids to flow in a cross flow in first and second fluid channels when viewed from a plane, and to have fins in each channel. The direction of the flow is regulated, resulting in extremely high heat exchange efficiency, and by forming the header portions so as to be integrated into both the left and right sides of the first and second fluid flow paths, the welded portions are extremely Therefore, it can be manufactured easily and inexpensively, and there is very little chance of liquid leakage, and there is no chance of foreign matter such as spatter getting into the container, and it has excellent pressure resistance. Moreover, it is an object of the present invention to provide a heat exchanger in which the flow direction of the first fluid flow path can be freely and easily set, and the heat exchange performance can be improved.

Means for Solving the Problems In order to achieve the above object, the present invention provides a heat exchanger that alternately includes a first fluid flow path and a second fluid flow path separated by a flat plate. A flat plate in which a flow path is arranged on both the upper and lower sides and has a fluid passage hole at both ends or a required end; and a first fluid flow that is interposed between both the flat plates and has an outer periphery that is approximately the same shape and size as the flat plate. An extruded section formed by a channel-forming annular body and comprising a flat plate section and a large number of parallel convex sections provided perpendicularly on both upper and lower surfaces of the flat plate section within the first fluid flow path. The inner fin is housed in the annular body except for the inside of both left and right end portions, and the second fluid flow path is arranged on both the upper and lower sides and includes a flat plate having a fluid passage hole at both ends or a required end, formed by a pair of spacers arranged on both left and right sides between the
A corrugated fin is arranged in the second fluid flow path, which is open in the front and rear, and has a corrugated shape when viewed from the front, and at least one of the left and right spacers has a fluid passage hole that communicates with the fluid passage hole in the upper and lower flat plates. The left and right header portions are formed by the fluid passage holes at both left and right ends of the flat plate, the left and right end portions of the first fluid flow path forming annular body without inner fins, and the fluid passage holes of the spacer. The main focus is on heat exchangers that are

Function: According to the above heat exchanger, an inner plate made of an extruded shape, which includes a flat plate portion and a large number of parallel convex portions provided perpendicularly on both upper and lower surfaces of the flat plate portion, is provided in the first fluid flow path. Fluid passage holes at both left and right ends of the flat plate in which the fins are housed, and left and right end portions of the first fluid flow path forming annular body without inner fins;
Header portions on both left and right sides are formed by the fluid passage holes of the spacer. Therefore, the first oil etc.
The fluid is introduced from one of the left and right headers, and flows through the first fluid flow path through an inner tube made of extruded material.
The flow direction of the first fluid is regulated by the flat plate portion of the fin and the numerous parallel convex portions, and the first fluid flows in parallel while contacting the inner fin, flows out from the other header portion, and flows out from the other header portion. On the other hand, the second fluid flow path is open in the front and rear, and the second fluid made of air is caused by forced air flow from a fan or natural ventilation from a running vehicle, etc.
When viewed from the front, the flow direction of the fluid is regulated by the corrugated fins, and the fluid is allowed to pass through while contacting the corrugated fins, so that the first fluid and the second fluid form a cross flow when viewed from the plane. Heat is exchanged between the flat plate, inner fins made of extruded material, and corrugated fins, and the heat exchange efficiency is excellent.

Embodiments Examples of the present 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.

1 to 7 showing a first embodiment of the present invention, a 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 is made of aluminum.
It has a first fluid flow path A and a second fluid flow path B separated by a flat plate 3 made of a brazing sheet, which alternate in the vertical direction. Oil flows through the first fluid flow path A, and air flows through the second fluid flow path B. Both channels A and B are arranged so that these fluids flow orthogonally. Header portions 2, 2 are formed on both left and right sides of the heat exchanger 1 so as to be integrally incorporated therein.

That is, as shown in FIGS. 3 and 5, the first fluid flow path A of the heat exchanger 1 includes flat plates 3, 3 arranged on both the upper and lower sides and having fluid passage holes 4, 4 at both left and right ends. , a first fluid flow path forming annular body 5 interposed between both flat plates 3, 3 and having an outer periphery of approximately the same shape and size as the flat plates 3, 3; The inner fins 6 are made of extruded aluminum and are arranged as follows.

The second fluid flow path B includes 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.
It is formed by 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. It is open to Further, fluid passage holes 9, 9 are formed in both the left and right spacers 7, 7, which communicate with the fluid passage holes 4, 4 of both 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 fluid passage holes 9, 9
It is formed by.

Here, the inner fin 6 housed in the first fluid flow path A is made of extruded aluminum, and includes a flat plate portion 6a and a large number of parallel fins provided perpendicularly on both upper and lower surfaces of the flat plate portion 6a. It is constituted by a convex portion 6b. Also, in the second fluid flow path B, a pair of upper and lower corrugated corrugated fins 8, 8 are disposed, and these fins 8, 8 have an aluminum brazing structure interposed between them. They are joined by an intermediate plate 10 made of a sheet.

First and second fluid flow paths A, B of heat exchanger 1
has the above-mentioned configuration except for the upper and lower end portions of the heat exchanger 1. In this embodiment, the fluid introduction pipe 11 and the fluid discharge pipe 12 are connected to both left and right ends of the upper surface of the heat exchanger 1, and the lower surface thereof is closed, so that the upper and lower ends have the following configuration. There is.

First, as shown in FIG. 2, at the upper end part, there is a surface plate 13 made of a relatively thick aluminum plate having fluid passage holes 14, 14 at both left and right ends, and a surface plate 13 made of a relatively thick aluminum plate that has fluid passage holes 14, 14 at both left and right ends. Flat plates 3, 3 made of aluminum brazing sheets having passage holes 4, 4, a pair of left and right spacers 7, 7 each having fluid passage holes 9, 9, and placed between the two spacers 7, 7. A second fluid flow path B is formed by one corrugated fin 8.

Next, as shown in FIG. 4, the lower end portion of the heat exchanger 1 includes a relatively thick surface plate 13 having no fluid passage holes, and a relatively thick surface plate 13 arranged above this and having fluid passage holes at both ends. A pair of left and right spacers 7, which also do not have fluid passage holes, are made of aluminum brazing sheets.
7 and one corrugated fin 8 disposed between both spacers 7, 7, a second fluid flow path B is formed. A pair of short ducts 15, 15 are attached to both the front and rear surfaces of the heat exchanger 1 so as to surround the outer periphery of all the second fluid flow paths B.

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 both the upper and lower surface plates 13 in a superposed 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 fluid introduction pipe 11. The oil flows through all the first fluid flow paths A from the left header section 2.
The direction of oil flow is regulated by the flat plate portion 6a and the numerous parallel convex portions 6b of the inner fin 6 made of extruded material, and the oil flows in parallel while contacting the inner fin 6. It flows out from the other right header section 2 and is discharged from the same header section 2 to the fluid discharge pipe 12. On the other hand, the second fluid flow path B is open in the front and rear, and air is forced into corrugated fins 8 that are corrugated when viewed from the front by forced airflow from a fan or by natural ventilation from running vehicles. Therefore, the flow direction of the oil is regulated, and the oil and air are allowed to pass while contacting the corrugated fins 8, so that the oil and air flow in a cross flow when viewed from the plane, and between the flat plate 3 and the extruded inner fins 6. and Colgate Huynh 8
Heat is exchanged between the two.

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 flow direction changes, the flat plate 3
The end of the spacer is closed and has no fluid passage hole, and the spacer also has no 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.

Note that 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 the present invention is applicable to the first fluid flow path A.
The same applies to vertical oil coolers in which the oil cooler is vertically arranged. 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 provides a heat exchanger that alternately includes a first fluid flow path and a second fluid flow path separated by a flat plate, in which the first fluid flow path is arranged on both the upper and lower sides. a flat plate having a fluid passage hole at both ends or one required end; and a first fluid flow path forming annular body interposed between the flat plates and having an outer circumference of approximately the same shape and size as the flat plate. Inner fins made of extruded material, each consisting of a flat plate part and a large number of parallel convex parts provided orthogonally on both the upper and lower surfaces of the flat plate part, are formed in the first fluid flow path on the left and right sides of the annular body. A second fluid passage is arranged on both the upper and lower sides and has a fluid passage hole at both ends or a required end, and a second fluid flow path is arranged on both the left and right sides between the flat plates. When viewed from the front, corrugated fins are arranged in this second fluid flow path, and at least one of the left and right spacers has upper and lower flat plates. Fluid passage holes are opened that communicate with the fluid passage holes of the flat plate, the fluid passage holes at both left and right ends of the flat plate, the left and right ends of the first fluid passage forming annular body without inner fins, and the fluid passage holes of the spacer. According to the heat exchanger of the present invention, a first fluid such as oil is introduced from one of the left and right header parts, and the first fluid is introduced from one of the left and right header parts. The flow direction of the first fluid is regulated in the fluid flow path by the flat plate portion of the inner fin made of an extruded shape material and a large number of parallel convex portions, and the first fluid flows in parallel while contacting the inner fin. It migrates and flows out from the other header. On the other hand, the second fluid flow path is open in the front and rear, and corrugated fins are arranged inside when viewed from the front, and are operated by forced air from a fan or by natural ventilation from running vehicles, etc. The second fluid made of air is regulated in its flow direction by the corrugated fins when viewed from the front, and is allowed to pass through while contacting the corrugated fins.

Therefore, according to the heat exchanger of the present invention, the first fluid and the second fluid flow in cross flow when viewed from the plane, and they mutually transfer heat through the flat plate, the inner fin made of extruded material, and the corrugated fin. The effect is that the heat exchange efficiency is excellent.

Further, in the heat exchanger of the present invention, the header portion is the first
Since it is integrally provided so as to be incorporated on both the left and right sides of the second fluid flow path, there are very few welded parts and the number of production steps is reduced, and therefore, it can be manufactured easily and inexpensively. ,
There is very little chance of liquid leakage. 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. Furthermore, by appropriately arranging a flat plate with a fluid passage hole at one end that is closed and a spacer without a fluid passage hole, the flow direction of the first fluid flow path can be freely and easily set. This has the advantage of improving heat exchange performance.

[Brief explanation of the drawing]

The drawings show two embodiments of the invention,
Fig. 1 is a partially omitted perspective view of the heat exchanger of the first embodiment, Fig. 2 is an exploded perspective view showing the flow path configuration of the upper end portion of the heat exchanger of Fig. FIG. 4 is an exploded perspective view showing the flow path configuration at the lower end of the same, FIG. 5 is an enlarged perspective view of the main part of FIG. 1, and FIG. 6 is a fluid introduction/discharge pipe and duct. FIG. 7 is a front view of the heat exchanger with the heat exchanger 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 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, 6a
...Flat plate part, 6b... Parallel convex part, 7
...Spacer, 8...Corrugate fin, 13
...Surface board.

Claims (1)

[Claims] 1 In a heat exchanger that alternately includes a first fluid passage A and a second fluid passage B separated by a flat plate 3, the first fluid passage A is arranged on both the upper and lower sides, and the first fluid passage A is arranged at both ends or at the required portion. Flat plates 3, 3 having a fluid passage hole 4 at one end, and a first fluid flow path forming annular body interposed between both flat plates 3, 3 and having an outer periphery of approximately the same shape and size as the flat plates 3, 3. 5 and a flat plate portion 6a in the first fluid flow path A.
and a large number of parallel convex portions 6b provided perpendicularly on both the upper and lower surfaces of the annular body 5. An inner fin 6 made of an extruded material is housed in the annular body 5 except for the inside of both left and right end portions. Flat plates 3, 3 in which fluid flow paths B are arranged on both upper and lower sides and have fluid passage holes 4 at both ends or a required end, and a pair of spacers arranged on both left and right sides between both flat plates 3, 3. A corrugated fin 8 is disposed in this second fluid flow path B and has a corrugated shape when viewed from the front. , a fluid passage hole 9 communicating with the fluid passage holes 4, 4 of both the upper and lower flat plates 3, 3 is opened, and the fluid passage holes 4, 4 at both left and right ends of the flat plate 3, and the first annular body 5 for forming a fluid flow path. A heat exchanger in which left and right header portions 2, 2 are formed by left and right end portions without inner fins 6 and fluid passage holes 9, 9 of spacers 7, 7.