Heat exchanger tank connection structure

Abstract

To improve the workability and intensity of the welding of a reinforcing plate which is welded into a tank of a bar-and-plate type heat exchanger.SOLUTION: A core 4 of a heat exchanger is formed by repeatedly laminating a planar rectangular plate 3, a partitioning part 1, the plate 3 and a bar material 2 in this order. The partitioning parts 1 are arranged at one end parts of the plate 3, and the bar materials 2 are arranged at the other end parts. In the core 4, a tank 5 is joined to an end face at which the bar material 2 is arranged. A reinforcing plate 6 for connecting an inner wall of the tank 5 and the end face of the core 4 is arranged in the tank 5. The reinforcing plate 6 extends in a lamination direction of the plate 3, the partitioning part 1 and the bar material 2 constituting the core 4. A welding bridge material 8 for partially blocking an opening part 7 is arranged at the opening part 7 between the plates 3 at the end face. An end part 6a of the reinforcing plate 6 at the core side is welded to the bar material 2 and the welding bridge material 8.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] This paper relates to the pressure-resistant structure of the tank in a heat exchanger with a bar-and-plate type core. [Background technology]

[0002] The structure shown in Figure 5 has been proposed as a tank connection structure for a conventional bar-and-plate heat exchanger. 5(A), this conventional heat exchanger has a core 24 in which a plate 23, a first bar member 21, a plate 23, and a second bar member 22 are repeatedly stacked in this order, with the first bar member 21 being arranged at one end of the plate 23 and the second bar member 22 being arranged at the other end. A tank 25 is joined to the end face of the core 24 where the second bar member 22 is arranged. A reinforcing plate 26 is arranged on the inner wall of the tank 25, connecting the inner wall of the tank 25 to the end face of the core 24. The reinforcing plate 26 extends in the stacking direction of the first bar material 21, the second bar material 22, and the plate 23 that make up the core 24. An opening 27 is formed between the plates 23 at the end face of the core 24 . Summary of the Invention [Problem to be solved by the invention]

[0003] In the tank connection structure of the heat exchanger as described above, as in the example shown in Figure 5(B), the second bar material 22 and the openings 27 are arranged alternately, and the welded joint 29 between the core 24 and the end 26a of the reinforcing plate 26 is intermittent. This reduces the workability of welding the reinforcing plate 26, and also shortens the weld length of the welded portion 29, which may result in insufficient weld strength. An object of the present invention is to solve the above problems. [Means for solving the problem]

[0004] The present invention as set forth in claim 1 uses a plate 3 having a rectangular plane, a core 4 in which plates 3, partitions 1, plates 3, and bar members 2 are repeatedly stacked in this order, with the partitions 1 being disposed at both ends of the plates 3 and the bar members 2 being disposed at the other ends; a tank 5 joined to the end surface of the core 4 where the bar material 2 is disposed; a reinforcing plate 6 connecting the inner wall of the tank 5 and the end face of the core 4; Equipped with In the tank connection structure of the heat exchanger, the reinforcing plate 6 extends in the stacking direction of the plates 3, the partitions 1, and the bar materials 2 that constitute the core 4, A welding bridge material 8 is disposed in the opening 7 between the plates 3 at the end surface to partially close the opening 7, This is a tank connection structure for a heat exchanger in which the core-side end 6a of the reinforcing plate 6 is welded to the bar material 2 and the welding bridge material 8.

[0005] The present invention as set forth in claim 2 provides the tank connection structure for a heat exchanger as set forth in claim 1, A notch 11 is formed in the plate 3 adjacent to the welding bridge material 8, and a protrusion 12 that fits into the notch 11 is a tank connection structure for the heat exchanger formed on the welding bridge material 8.

[0006] The present invention as set forth in claim 3 provides the tank connection structure for a heat exchanger as set forth in claim 1, This is a tank connection structure for a heat exchanger in which a protrusion 13 that protrudes into an opening 7 in which the welding bridge material 8 is placed is formed on a plate 3 adjacent to the welding bridge material 8, and the welding bridge material 8 is held by the protrusion 13. [Effects of the Invention]

[0007] The invention described in claim 1 is such that a welding bridge material 8 is placed in an opening 7 between plates 3 at the end face where the bar material 2 of the core 4 is arranged, partially blocking the opening 7, and the core-side end 6a of the reinforcing plate 6 is welded to the bar material 2 and the welding bridge material 8. This allows the welded portion 9 to be formed continuously between the reinforcing plate 6 and the core 4, improving the workability of welding. At the same time, the welded portion 9 of the reinforcing plate 6 has a long weld length, ensuring sufficient weld strength.

[0008] As in the invention described in claim 2, when a notch 11 is formed in the plate 3 adjacent to the welding bridge material 8 and a protrusion 12 that fits into the notch 11 is formed on the welding bridge material 8, the welding bridge material 8 is reliably positioned.

[0009] As in the invention described in claim 3, a protrusion 13 is formed on the plate 3 adjacent to the welding bridge material 8, protruding into the opening 7 in which the welding bridge material 8 is placed, and when the welding bridge material 8 is held by the protrusion 13, the welding bridge material 8 is reliably positioned. [Brief explanation of the drawings]

[0010] [Figure 1] 1A and 1B are explanatory views showing a tank connection structure of a heat exchanger according to the present invention, in which FIG. 1A is a perspective view of a main part, and FIG. 1B is an enlarged view of part B of FIG. 1A. [Figure 2] FIG. 2 is a cross-sectional view taken along the line II-II in FIG. 1(A). [Figure 3] 3A is a perspective view of a main part of the tank connection structure according to the first embodiment, and FIG. 3B is a cross-sectional view taken along the line BB in FIG. 3A. [Figure 4] 4A is a perspective view of a main part of a second embodiment of a tank connection structure for a heat exchanger according to the present invention, and FIG. 4B is a cross-sectional view taken along the line BB in FIG. 4A. [Figure 5] 5A and 5B show a tank connection structure of a conventional heat exchanger, in which FIG. 5A is a perspective view of the main part, and FIG. 5B is an enlarged view of part B of FIG. 5A. DETAILED DESCRIPTION OF THE INVENTION

[0011] Next, an embodiment of the present invention will be described with reference to the drawings. Fig. 1 is an explanatory diagram showing the tank connection structure of the heat exchanger of the present invention, Fig. 1(A) is a perspective view of the main part, Fig. 1(B) is an enlarged view of part B of Fig. 1(A), Fig. 2 is a cross-sectional view taken along the line II-II of Fig. 1(A).

[0012] In the present invention, the partition 1 may be configured using a member such as a bar material, or may be configured by folding the end of the plate 3. In the following description, this partition 1 will be described as the first bar material 1, and the bar material 2 will be described as the second bar material 2. The plate 3 of the present invention has a rectangular plane. In this example, the heat exchanger is formed by repeatedly stacking a plate 3, a first bar material 1, a plate 3, and a second bar material 2 in that order, with the first bar material 1 being positioned at one end of the plate 3 and the second bar material 2 being positioned at the other end. A first flow path 7a is formed in the area surrounded by the first bar material 1 and the plate 3, and a second flow path 7b is formed in the area surrounded by the second bar material 2 and the plate 3.

[0013] 1, the top of the second bar material 2 is formed flat and forms the end face of the core 4. Adjacent to the top of the second bar material 2, an opening 7 of the first flow path 7a is located. As shown in FIGS. 1(A) and 2, a pair of tanks 5 are joined to the end surface of the core 4, which has the openings 7 of the first flow paths 7a. 2, a first fluid 14 flows through the tank 5 and each of the first flow paths 7a, and a second fluid 15 flows through each of the second flow paths 7b. Heat exchange occurs between these fluids 14, 15.

[0014] The tank 5 in this example is made up of a tank body 5a and side plates 5b. Inside the tank 5, a reinforcing plate 6 extending in the stacking direction of the plate 3, first bar material 1, and second bar material 2 is erected on the end face of the core 4, connecting the end face of the core 4 to the inner wall of the tank 5. The core-side end 6a of the reinforcing plate 6 crosses the middle position of each second bar material 2 in the longitudinal direction. As shown in Figure 1(A), a welding bridge material 8 is placed in the opening 7 of the first flow path 7a so that it matches the width of the first flow path 7a in the short direction of the opening 7, and the welding bridge material 8 partially blocks the position where the core-side end 6a of the reinforcing plate 6 crosses the opening 7. The top of the welding bridge material 8 is formed flat, as shown in Figures 1(A) and 1(B). It is desirable that the flat top of each second bar material 2 and the flat top of the welding bridge material 8 are flush with each other. The core-side end 6a of the reinforcing plate 6 abuts against the flat top of each second bar 2 and the flat top of the welding bridge material 8, and a weld 9 is formed at the abutting portion. This structure allows for the formation of a weld 9 by continuously welding the reinforcing plate 6 to the end face of the core 4, improving the workability of welding. In addition, the weld length of the weld 9 is increased, ensuring sufficient welding strength of the reinforcing plate 6. As a result, the pressure resistance of the tank 5 is improved. The reinforcing plate 6 is provided with a communication port 16 for allowing the first fluid 14 to pass through to the back of the reinforcing plate 6.

[0015] FIG. 3 shows a first embodiment of a structure for positioning a welding bridge material 8, in which FIG. 3(A) is a perspective view of the main part, and FIG. 3(B) is a cross-sectional view taken along the line BB in FIG. 3(A). In this example, as shown in Figures 3(A) and 3(B), notches 11 are formed in the openings 7 of the pair of plates 3 that form the first flow path 7a. In addition, protrusions 12 that fit into the notches 11 of each plate 3 are formed on the welding bridge material 8. Then, the projections 12 of the welding bridge material 8 are fitted into the positions of the notches 11 of the plate 3 , and the welding bridge material 8 is positioned in the opening 7 . Inner fins 10 are interposed in the opening 7 except for the position where the welding bridge material 8 is disposed.

[0016] FIG. 4 shows a second embodiment of the structure for positioning the welding bridge material 8, in which FIG. 4(A) is a perspective view of the main part, and FIG. 4(B) is a cross-sectional view taken along the line BB in FIG. 4(A). In this example, a protrusion 13 that protrudes into the first flow path 7a is formed near the opening 7 of the pair of plates 3 that form the first flow path 7a. Then, as shown in Figures 4(A) and 4(B), the side of the welding bridge material 8 comes into contact with the protrusion 13, so that the welding bridge material 8 is positioned in the opening 7. Inner fins 10 are interposed in the opening 7 except for the position where the welding bridge material 8 is disposed.

[0017] The structure for positioning the welding bridge material 8 is not limited to the embodiment shown in FIGS. [Industrial Applicability]

[0018] The present invention is widely applicable to bar-and-plate type heat exchangers, and is particularly suitable for oil coolers for construction machinery, which require high pressure resistance. [Explanation of symbols]

[0019] 1 Partition (first bar material) 2 Bar material (second bar material) 3 plates 4 cores 5 Tank 5a Tank body 5b Side plate 6 Reinforcement plate 6a end

[0020] 7 Openings 7a First flow path 7b Second flow path 8. Welding bridge materials 9 Welded parts 10 Innerfin 11 Notch 12 protrusions 13 Protrusion 14 1st fluid 15 Second fluid 16 Connecting port

[0021] 21 First bar material 22 Second bar material 23 Plate 24 cores 25 Tank 26 Reinforcement plate 26a End 27 Opening 29 Welded parts

Claims

1. Using a plate (3) with a rectangular plane, a core (4) in which a plate (3), a partition (1), a plate (3), and a bar material (2) are repeatedly stacked in this order, with the partition (1) being disposed at one end of the plate (3) and the bar material (2) being disposed at the other end; a tank (5) joined to the end surface of the core (4) where the bar material (2) is arranged; a reinforcing plate (6) connecting the inner wall of the tank (5) and the end face of the core (4); Equipped with In a tank connection structure for a heat exchanger, the reinforcing plate (6) extends in the stacking direction of the plates (3), partitions (1) and bar materials (2) that constitute the core (4), A welding bridge (8) is disposed in the opening (7) between the plates (3) at the end surface to partially close the opening (7), The reinforcing plate (6) is provided with a communication port (16) that communicates the inside of the tank (5) divided into two parts by the reinforcing plate (6), The core-side end (6a) of the reinforcing plate (6) is welded to the bar material (2) and the welding bridge material (8), A tank connection structure for a heat exchanger, in which the welding bridge (8) is not formed over the entire area between the other two ends of the plate (3).

2. 2. The tank connection structure for a heat exchanger according to claim 1, A tank connection structure for a heat exchanger in which a notch (11) is formed in a plate (3) adjacent to a welding bridge material (8), and a protrusion (12) that fits into the notch (11) is formed on the welding bridge material (8).

3. 2. The tank connection structure for a heat exchanger according to claim 1, A tank connection structure for a heat exchanger, in which a protrusion (13) is formed on a plate (3) adjacent to a welding bridge material (8) so as to protrude into an opening (7) in which the welding bridge material (8) is placed, and the welding bridge material (8) is held by the protrusion (13).

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