JPS62203631A - Manufacturing method of laminated heat exchanger - Google Patents

Abstract

PURPOSE:To decrease the number of parts necessary for assembling a heat exchanger and to shorten the assembling time by forming a forming plate in the state of a series of linked parallel placing development. CONSTITUTION:The mutually adjoining plural pieces each of forming plates 11, 11 are formed in the state of a series of parallel placing developments that the mutual side edges each other is linked via one or plural pieces of slender strip like connection pieces 10. This integral forming body is manufactured once by surviving the connection piece 10 in the necessary length between the adjoining forming plates each other simultanously with the forming operation of individual forming plate 11 by pressing. In assembling, a tube element 1 part is formed by overlapping in a principal rafter state the forming plates 11, 11 each other that makes a pair each other by bending the connection piece 10 in order, and tank parts 8, 8 are overlapped each other in the state of the adjacent forming plate of the tube element 1 each other being back to back.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a laminated heat exchanger such as that used as an evaporator in a car cooler, and in particular to a multilayer heat exchanger that includes a plurality of plate-like tube elements forming heat exchange medium passages. The present invention relates to a method of manufacturing a groove type or knitted stacked heat exchanger which is stacked one above the other with an air flow gap between them that includes outer fins.

Conventional technology The well-known laminated heat exchanger is generally
Heat exchange is performed by alternately stacking tube elements made of a pair of pressed metal plates such as aluminum joined together to form heat exchange medium passages, and outer fins made of corrugated fins. A core part is formed, and a tank part is formed at both ends or one end of the tank part to store and distribute the heat exchange medium. Because of these advantages, it is particularly suitable for use as an evaporator for car coolers where installation space is severely restricted.

Conventionally, the core part of this type of laminated heat exchanger has been manufactured by forming a pair of molded plates forming each tube element, an outer fin installed between the tube elements, and further forming the tube. The inner fins installed in the evaporation chamber or the heat exchange medium passage in the internal space of the element are manufactured separately, and then stacked and set in a predetermined order during assembly. Attachment is carried out by joining them all at once.

Problems to be Solved by the Invention However, when using the conventional manufacturing method as described above, since the stacked heat exchanger has an extremely large number of component parts, it is very difficult to manage the parts even at the pre-assembly stage. Not only that, but also during assembly, many parts must be handled and assembled individually, which requires a lot of time and effort, resulting in poor productivity and high costs.

Means for Solving the Problems In view of the above-mentioned problems, the present invention aims to substantially reduce the number of parts by manufacturing a good number of component parts as a coherent whole. It is designed to facilitate parts management and to simplify and streamline assembly work.

That is, the present invention provides a laminated type heat exchange core portion in which a required number of stages of a heat exchange core portion is formed by alternately laminating a flat tube element in which a pair of molded plates are stacked together in a state where their peripheral edges are joined, and outer fins. A method for manufacturing a heat exchanger, in which at least one pair or more of adjacent molded plates are molded into a series of juxtaposed developed states in which the corresponding side edges are connected via one or more connecting pieces. The gist of this invention is a method for manufacturing a laminated heat exchanger, characterized in that each unit tube element is assembled by folding the connecting pieces and overlapping adjacent image forming plates when assembling the core part. do.

The number of forming plates to be formed in series via connecting pieces is:
1 forming a pair to constitute one unit tube element
The minimum number of paired molded plates is one unit, and the total number of molded plates corresponding to the number of tube elements in the entire heat exchanger is maximized. It is preferable to mold two to four molded plates as one piece.

Examples Example 1 FIG. 4 shows a typical example of a laminated heat exchanger manufactured by applying the present invention. In the figure, (1) shows several plate-like tube elements arranged horizontally and in multiple stages in the vertical direction, and (2) shows the tube elements (1) interposed between adjacent tube elements (1). Outer fins are alternately laminated and integrally bonded thereto, (3) are upper and lower end plates, (4) and (5) are artificial headers and outlet headers for the heat exchange medium.

As shown in Fig. 1, the tube element (1) is composed of a pair of molded plates (It) (11) made of metal plates such as aluminum plates, each joined together with a flat surface inside. A tubular heat exchange medium passage (6) is formed, inner fins (7) made of corrugated fins or multi-entry fins are interposed in the passage, and tank portions communicating with the passage are provided at both ends. (8) is formed in a bulging shape. (9) is a communication hole bored in the top wall of this tank part, and the adjacent tube elements (11) (11) and the mutual tank parts (8) (8)
The two communicate with each other in the bonded state.

In manufacturing the laminated heat exchanger as described above, in the present invention, first, a plurality of mutually adjacent molded plates (11) (11) are stacked together as shown in FIGS. 2 and 3. The side edges of the tubes are formed into a series of side-by-side developments in which the side edges are connected via one or more narrow strip-shaped connecting pieces (10).

This integrally molded product is manufactured at once by pressing, simultaneously with the molding operation of each molded plate (11), by leaving a connecting piece (lO) of a required length between adjacent molded plates. . Therefore, the connecting piece (1
Since the item 0) is to be bent when assembling the heat exchanger, a notch or a V-shaped bent portion is provided at a predetermined bending portion to facilitate bending as shown in Fig. 3. (loa) etc. is preferably formed. In addition, the position is set at the tank part (8) so as not to increase the air flow resistance as much as possible after the heat exchanger is assembled.
It is preferable to provide it at a position near .

When assembling the heat exchanger, the integral molded product containing the plurality of molded plates (11) (11) molded as described above is bent as shown in Fig. 1 to form a predetermined laminate. Configure. That is, by sequentially bending the connecting pieces (10), the molded plates (11) forming a pair with each other are formed.
) (11) Place the tube elements (1) on top of each other with their hands together, and place the molded plates of adjacent tube elements back to back to form their tank parts (8) and (8). The buttocks shall be stacked together. In addition, at this time, a pair of molded plates (11) constituting the tube element (1)
(11) Inner fins (
7), and outer fins (2) made of corrugated fins or the like are interposed between adjacent tube elements (1) (1).

If necessary, a plurality of laminates are assembled from each integrally molded product obtained in this way to form the required number of tube elements (1).
and L outer fins (2) to form an alternately laminated product to obtain a tentative assembly of the entire heat exchanger. This is then brazed according to conventional methods to form the desired laminated heat exchanger. Incidentally, after this joining is completed, the connecting piece (9) may be left as is or may be removed.

Embodiment 2 This embodiment is shown in FIGS. 4 and 5, and is designed so that the connecting pieces do not provide as much resistance as possible to the air flowing through the core.
In addition, consideration has been given to ensuring that the connecting piece does not protrude outward from the core portion as much as possible.

That is, the tank portions (18) at both ends of the molded plate (21)
Abbreviated indentations (12) (12) are formed on the side edges of both ends of the plate so that the connecting piece is narrower than the flat tube part constituting the intermediate heat exchange medium passage. (20) are continuously provided from the side edge of this indented portion (12), and the adjacent molding plates 1 (21) (21) are connected in series.

The rest is the same as in the case of the first embodiment, and the corresponding parts and members are designated by the same number 71 and the explanation thereof will be omitted.

Effects of the Invention As described above, the present invention provides a heat exchange core section with a required number of stages by alternately stacking a flat tube element in which a pair of molded plates are oriented in a state of palms together and their peripheral edges are joined, and outer fins. A method of manufacturing a laminated heat exchanger in which at least one pair of adjacent molded plates is formed, a series of juxtaposition in which the corresponding side edges are connected via one or more connecting pieces during molding. Shall be formed into an expanded state,
When assembling the core part, each unit tube element is assembled by folding the connecting pieces and overlapping the adjacent image molding plates, so first, each molding plate is separated individually as in the conventional method. Compared to the case where the heat exchanger is manufactured in one piece, since a plurality of molded plates are handled and assembled as one body, the number of independent parts required for assembling the heat exchanger can be significantly reduced. Therefore, parts management becomes easier. In addition, when assembling, it is possible to fold multiple molded pieces by bending the connecting pieces, compared to the conventional method of stacking individual molded plates one by one alternately via outer fins or inner fins. Since the plates can be stacked accurately, the effort and time required for assembly can be reduced.

Therefore, productivity can be improved and manufacturing costs can be further reduced than in the past.

[Brief explanation of drawings]

1 to 4 show a first embodiment of the present invention, in which FIG. 1 is a perspective view showing the assembled state of the heat exchanger core, and FIG. 2 shows a plurality of molded plates connected together. Fig. 3 is a cross-sectional view taken along the line ■-■ in Fig. 2, Fig. 4 is a plan view of the integrally molded product.
The figure is a front view of the heat exchanger after assembly. Figures 5 and 6
The figures show the second embodiment, and are a plan view and a perspective view corresponding to FIG. 2 and FIG. 1, respectively. (1)...Tube element (2)...Outer fin, (6)...Heat exchange medium passage, (7)...Inner fin, (8) (1B)...Tank part, (
10) (20)...Connecting piece, (11) (21
)...molding plate, (12)...indented part. that's all

Claims (2)

[Claims] (1) A laminated heat exchanger in which a heat exchange core with the required number of stages is formed by alternately laminating a flat tube element in which a pair of molded plates are stacked together in a state of joining their peripheral edges and outer fins are laminated alternately. In the manufacturing method, at least one pair of adjacent molded plates are molded into a series of juxtaposed developed states in which the corresponding side edges are connected via one or more connecting pieces, and the core Each unit tube element is assembled by folding the connecting piece and overlapping both adjacent molded plates when assembling the parts,
Method for manufacturing a laminated heat exchanger. (2) Indentations are formed on the side edges of both ends so that the tank portions at both ends of the molded plate are narrower than the other portions, and the connecting pieces are provided on the side edges within the indentation to connect adjacent portions. 2. The method of manufacturing a laminated heat exchanger according to claim 1, wherein the molded plates are connected to each other.