JPS6215671Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a core unit in a laminated heat exchanger such as an oil cooler for an automobile, and more specifically relates to an improvement in connection openings of each core unit.

[Technical background of the invention and its problems]

Conventionally, an example of a connecting opening in a core unit of a laminated heat exchanger is shown in FIG. That is, each core unit 6, 7
consists of a pair of upper and lower metal plates 1 and 2, the peripheral edges of the metal plates 1 and 2 are closed, and a flow path 3 is formed between them. Then, openings for connection are provided at both ends of each flow path 3, respectively. Then, an annular rising portion 8 is formed only in the opening on the upper surface side so that the core units 6 and 7 are fitted and connected without shifting their positions, and the annular rising portion 8 is fitted into the opening of the upper core unit 6. I was trying to do that. However, such a connection method requires relatively strict precision of the annular riser 8. At the same time, when assembling each core unit 6, 7, there is a problem in that the annular rising portion 8 must always be positioned so as to face upward. Therefore, as other embodiments, those shown in FIGS. 2 and 3 have been proposed. This is a method in which the periphery of the opening is divided into an even number of parts, each flange piece formed there is cut and raised every other, and the cut and raised flange piece 9 is fitted into the other opening 4 for positioning. It is. However, each flange piece 9 was formed at both longitudinal ends of the core units 6, 7 so as not to be rotationally symmetrical with respect to the center as shown in FIG. Therefore, if the left and right sides are mixed up during assembly, the core units 6 and 7 cannot be stacked on top of each other. At the same time, since the flange piece 9 is relatively large, it requires precision, and it takes a relatively long time to stack and fit the upper and lower core units 6 and 7 together. . That is, since the fitting area of the flange piece 9 is relatively wide, there is a possibility that smooth alignment may not be achieved.

[Summary of the idea]

Therefore, the object of the present invention is to eliminate the above-mentioned problems and provide a structure in which each core unit can be laminated extremely easily and quickly.

The core unit of the present invention has a pair of metal plates 1 and 2 formed in the same shape, with their inner surfaces facing each other and their peripheral edges closed. A flow path 3 is formed between them in the longitudinal direction. Further, openings 4 are provided at both ends of the flow path 3 through which the metal plates 1 and 2 are passed through in the thickness direction.
Then, the openings 4 of each of the metal plates 1 and 2 are provided with positioning claws 5 which are extremely small compared to the openings, and each opening 4 has at least three of them bent outward and erected at a distance from each other. The positions of the claw portions 5 are rotationally symmetrical by 180° with respect to the center point 0 at the openings at both longitudinal ends of each metal plate 1, 2.
At the same time, the claw portion 5 does not exist on the longitudinal axis l passing through the center point 0. Furthermore, the first opening 4
The claw portion 5 is provided so as not to be in a line-symmetrical position with respect to the axis l.

Therefore, when manufacturing the core unit, no problem will occur even if the metal plates 1 and 2, which are formed in the same shape, are assembled in any position. That is, even if one metal plate 1 is rotated 180 degrees around point 0, the relative relationship between both metal plates 1 and 2 remains the same. Next, among the core units 6 and 7 to be stacked, even if one of the core units is rotated by 180 degrees with respect to its axis l, the relative relationship between the core units 6 and 7 does not change. At the same time, there is no problem even if one core unit is rotated horizontally by 180 degrees around the center point 0. Furthermore, when the core units 6 and 7 are stacked and the respective openings are connected, the respective claws 5 do not interfere with each other in the vertical direction, so that their positioning can be performed reliably. At the same time, since each claw portion 5 is extremely small compared to the opening 4, precision in cutting and raising the claw portion 5 is not required. At the same time, it can be easily and quickly fitted into the opening of the other party.

[Example of idea]

FIG. 4 shows a plan view of the metal plates 1 and 2 constituting the core units 6 and 7 of the present invention, and FIG.
A cross-sectional view taken along the line A-A in the figure, and Fig. 6 is the same B-B.
FIG. As is clear from the figure, in this embodiment, extremely small claw portions 5 are bent outward in the openings 4 formed at both ends of each metal plate 1, 2.
Installed every 120°. The outer surface of the claw portion 5 is formed slightly inside the diameter of the opening 4. Furthermore, each claw portion 5 does not exist on the central axis l in one opening 4. At the same time, when comparing the relative positions of the respective claw portions 5 of the left and right openings 4, 4,
It is formed in a protruding manner at a rotationally symmetrical position of 180 degrees with respect to the center point 0. Note that the metal plates 1 and 2 in this embodiment are mainly used for an oil cooler, and are approximately parallel to the axis l of the core unit.
A waveform is formed in the 45° direction. Then, these waveforms are superimposed so that their ridge lines intersect with each other as shown in FIG. Then, as shown in FIG. 7, the periphery is closed to form one core unit. In the core units 6, 7, oil flows in from one opening 4 and moves in a zigzag pattern within the corrugated plate, and flows out from the other opening. Here, when forming the core units 6 and 7, there is no problem even if the right and left sides of one metal plate 1 are mixed up. That is, even with this, the relative position of each claw portion 5 does not change at all. Next, such core units 6 and 7 are laminated as appropriate to form the 11th core unit.
Obtain a heat exchanger as shown in the figure. At this time, move one core unit horizontally around its center point 0.
Even when rotated by 180 degrees, the relative positions of the claws 5 do not change. Therefore, when assembling the core units 6 and 7 together, there is no need to worry about mixing up the left and right parts. At the same time, the relative position of the claw portion 5 does not change even if the claw portion 5 is rotated vertically by 180° with respect to the axis 1.
Therefore, assembly errors due to confusion between the upper and lower surfaces do not occur.

[Effect of idea]

In the core unit of the present invention, at least three extremely small claws 5 for positioning are bent outward and erected at a distance from each other in each opening 4 of metal plates 1 and 2, which are formed in the same shape. The relative positions of the claws at both ends of each metal plate in the longitudinal direction are rotationally symmetrical at 180 degrees with respect to the center point 0 of the metal plates 1 and 2. At the same time, the position of the claw portion 5 is formed so that it does not lie on the longitudinal axis l passing through the center point 0. Furthermore, the first opening 4
It is characterized in that each claw part 5 is provided so as not to be in a line-symmetrical position with respect to the axis l.

The present invention has the above configuration and has the following effects.

(1) The core unit of the present invention is made up of a pair of metal plates 1 and 2 formed in the same shape, with their inner surfaces facing each other and their peripheral edges closed. A heat exchanger is constructed by stacking a plurality of core units. Here, the positions of the claw portions 5 formed in the openings 4 at both ends of the metal plates 1 and 2 are rotationally symmetrical at 180° with respect to their center point 0. Therefore, when constructing a single core unit, even if the left and right parts are replaced in the longitudinal direction, the relative position of each claw part 5 in each opening 4 will not change. Therefore, when manufacturing the core unit, you can assemble it without worrying about mixing up the left and right sides. This eliminates the step of exchanging the left and right sides during assembly, allowing quick assembly.

(2) Furthermore, the position of each claw portion 5 does not lie on the axis l passing through the center point 0 and parallel to the longitudinal direction. At the same time, each claw part 5 does not exist in a line-symmetrical position with respect to the axis l within one opening 4. Therefore, when stacking each core unit, the respective claw portions 5 do not interfere with each other, and are fitted into the respective openings 4 of the other at positions separated from each other. Furthermore, even if the right and left sides of each core unit are mixed up in the longitudinal direction, there is no effect whatsoever. Further, no problem will occur even if the top and bottom surfaces of each core unit are installed in reverse.

(3) Furthermore, the claw portions 5 of the present invention are bent outward in each opening 4 at least three times apart from each other. At the same time, the size of each claw portion 5 is determined by the size of the opening 4.
It is extremely small compared to . Therefore, it is extremely easy to fit each claw part 5 into the opening 4 of the other, and there is an effect that three or more claw parts 5 enable accurate positioning.

Furthermore, since each claw portion 5 is extremely small, its rising accuracy is not strictly required, and its manufacture is easy.

(4) Furthermore, with the above configuration, the pair of metal plates 1 and 2 can be made into the same shape, so the number of parts can be reduced and the laminated heat exchanger can be provided at low cost.

[Brief explanation of the drawing]

Figure 1 is a cross-sectional view of the connection structure in the core unit of a conventional laminated heat exchanger, Figure 2 is a cross-sectional view of another conventional core unit, Figure 3 is a plan view of the same, and Figure 4 is the present invention. 5 is a cross-sectional view taken along the line A-A of FIG. 4, FIG. 6 is a cross-sectional view taken along the line B-B of FIG. 7, and FIG. Elevation of the core unit,
8 is a sectional view taken along the line A-A in FIG. 7, FIG. 9 is a sectional view taken along the line B-B in FIG. 7, and FIG. A partially cutaway view showing the mating structure, FIG. 11 is an embodiment in which a heat exchanger is constructed by laminating the core units 6 and 7 of the present invention, and FIG. 12 is a cross-sectional view taken along the line A-A in FIG. 11. . 1, 2... Metal plate, 3... Channel, 4... Opening,
5... Claw portion, 6, 7... Core unit, 8...
Annular rising portion, 9...flange piece.

Claims (1)

[Scope of utility model registration request] The inner surfaces of a pair of metal plates 1 and 2 formed in the same shape are opposed to each other, their peripheral edges are closed, and a flow path 3 is formed between them in the longitudinal direction. In the core unit of the laminated heat exchanger, in which openings 4 are provided at both ends of the passages 3 through which the metal plates 1 and 2 are penetrated in the thickness direction, the openings 4 are provided in the openings 4 of each of the metal plates 1 and 2. 4
At least three claws 5 for positioning, which are extremely small compared to the above, are bent and erected on the outer surface side of the metal plates 1 and 2 at a distance from each other, and openings 4 at both longitudinal ends of each metal plate 1 and 2 are provided.
The positions of the claws 5 provided at the respective metal plates 1 and 2 are rotationally symmetrical at 180 degrees with respect to the center point 0 of each of the metal plates 1 and 2, and the longitudinal axis l passing through the center point 0 A core unit of a laminated heat exchanger, characterized in that the claw portions 5 are not located above the core unit, and each claw portion 5 is provided in a position that is not line-symmetrical with respect to the axis l within one opening 4. .