JPH06100433B2 - Stacked heat exchanger - Google Patents

Description

TECHNICAL FIELD The present invention relates to a laminated heat exchanger having a tank only on one end side.

(Prior Art) As a conventional heat exchanger of this type, for example, Japanese Patent Laid-Open No. 61-
Those disclosed in Japanese Patent No. 161398 are known. This is formed by alternately stacking tube elements formed by joining two forming plates and fins in a plurality of stages, and forming a tank forming bulge at one end of the forming plate. At the same time, the other end has a joint formed by bending at a right angle. The tube element is formed by aligning these molded plates in the middle, and adjacent tube elements are flanges provided at the bulging portion for tank formation at one end and the other end is abutted at the joint portion, respectively, and between them. The fins are inserted and fixed, and they are joined by brazing in the furnace.

(Problems to be Solved by the Invention) Generally, in a heat exchanger in which a tank is formed only on one end side, the other tank sides of the tube elements face each other through fins, so some sort of fixing means must be provided. Not stable. Considering this point, the above-mentioned joint is
It is considered to have functions such as realizing stable temporary assembly and keeping the pitch between the tube elements constant.

However, since the above-mentioned joint is formed by simply bending and abutting the ends of the forming plates, when performing brazing in the high temperature atmosphere of the furnace, for example, a compressive load is applied in the stacking direction of the heat exchanger for some reason. From experience, it has been found that when it is received, it cannot be easily buckled and deformed to maintain a uniform pitch. Therefore, the applicant previously submitted a product in which unevenness is formed in the joint portion, a melon is formed, and the melon of the joint portion is engaged and abutted, and the tube element is used to more reliably secure the non-tank side. It is now possible to stabilize and maintain a uniform pitch at all times.

However, in the laminated heat exchanger, the automatic assembly by a machine is the mainstream, and if the joining parts are engaged with each other at the time of assembly, there is a problem in correcting the assembly. That is, in order to correct the engagement of the melon, it is necessary to move the tube element in the separating direction, and the correction operation mechanism is complicated.

Therefore, according to the present invention, the strength of the joint can be obtained, and
It is an object of the present invention to provide a laminated heat exchanger in which the abutting of joints can be easily corrected.

(Means for Solving the Problems) In the laminated heat exchanger of the present invention, two tanks are formed on one end side, and two tube elements having a heat exchange medium passage in the remaining portion are formed into a flat plate shape. In a laminated heat exchanger constituted by a plate and formed by alternately laminating the tube elements and fins, a concave portion and a convex portion are alternately arranged on the side of the molding plate opposite to the tank along the peripheral edge of the molding plate. A formed joint portion is provided, a joint surface in the same direction as the molding plate is provided in the recess of the joint portion, and the joint surface of the joint portion is abutted on the opposite tank side of the adjacent tube element, This is because the protrusions are continuous in the stacking direction.

(Operation) Therefore, the joint portion is formed with the concavities and convexities alternately and becomes structurally strong, the possibility of buckling is reduced even in a high temperature atmosphere, and the joint surface provided in the concave portion of the joint portion is abutted. Regardless of the meshing, it is moved by the stopping operation from the lateral direction, the misassembly is reduced, and the protrusions are connected in the stacking direction.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

FIGS. 1 and 2 show a laminated heat exchanger of, for example, a 4-bus system in which tube elements 1 and fins 2 are alternately laminated.

The tube element 1 is formed by joining two molding plates 3 and 3 at their peripheral edges, and has two tanks 4a and 4b on the air upstream side and the air downstream side on one end side and a heat exchange medium on the remaining portion. Each has a heat exchange medium passage 5 through which it passes.

As shown in FIGS. 3 and 4, the molding plate 3 is provided with two bowl-shaped bulging portions 6a and 6b for forming a tank at one end, and subsequently, a bulging portion for forming a passage is formed. A part 7 is formed, and two tanks 4 are provided in the passage forming bulging part 7.
A ridge 8 extending from between a and 4b to near the other end of the tube element 1 is formed. This ridge 8 is joined to the other ridge when the molding plate 3 is joined, and partitions the heat exchange medium passage 5 to the vicinity of the other end of the tube element to form a U-shape as a whole. In addition, tube elements on both sides
In 1, 1, the outer molding plates 3a, 3b are formed flat. And adjacent tube elements 1,
The tank side of 1 is abutted by the tank forming bulging portions 6a and 6b of the respective molding plates 3, and the tank forming bulging portions 6a and 6b of the respective tanks are formed except for substantially the center of the air inflow side.
They communicate with each other through a communication hole 9 formed in a and 6b. The end plates 10 and 10 are joined to the tube elements 1a and 1b at both ends via the fins 2, and the inlet / outlet joints 11a and 11b leading to the inflow side tank 4a are attached between the end plates 10 and 10. Has been. This door joint 11a, 1
1b is formed by joining two inlet / outlet joint members 12a, 12b, and an inlet / outlet portion 13 which is enlarged in a tapered shape is formed at one end thereof, and the inlet / outlet portion 13 is projected toward the upstream side. There is.

Therefore, the heat exchange medium entering from one inlet / outlet joint 11a is almost half of the tube element in the air upstream side tank.
4a rises along the heat exchange medium passage 5 along the ridge 8 and makes a U-turn above the ridge 8 to descend to the air downstream tank 4b.
Leading to. Since the downstream side is communicated everywhere, about half of the remaining tube element flows into the downstream side tank 4b, rises up the heat exchange medium passage 5 along the ridge 8, and above the ridge 8. After making a U-turn and descending,
It flows out from the upstream side tank 4a via the other inlet / outlet joint 11b.

The tube elements constituting such a heat exchanger are abutted with each other on the side opposite to the tank via a joint portion 15 shown in FIGS. 5 and 6. The joint portion 15 is formed by bending the other end of the molding plate 3 toward the fin 2 side, and a large number of recesses 16 and protrusions 17 are alternately formed along the periphery of the plate 3. The concave portions 16 and the convex portions 17 have three concave portions 16 as shown in FIG. 5 and FIG.
Is two. Further, the recess 16 has a joining surface 16a formed at its tip (joining side) and bent in the same direction as the molding plate 3. As is apparent from the development view shown in FIG. 8, the joint surface 16a is formed by bending the portion of the recess 16 where the tip end extends by 90 degrees in the direction opposite to the tank. The joint surface 16a is flush with the tip 17a of the convex portion 17.

In the above configuration, when assembling the heat exchanger,
The brazing material is clad in advance on the forming plate, etc.
The end plate 10, the inlet / outlet joints 11a and 11b, the molding plate 3 and the fins 2 are laminated in the state shown in FIGS. As for the assembling method, the molding plates 3 forming the other tube elements are abutted with the tank forming bulging portions 6a and 6b on the tank side and the joint portion 15 on the non-tank side. At that time, the fins 2 are interposed and integrated, and a plurality of them are laminated and assembled.

As shown in FIG. 6, the abutment at the joint portion 15 on the side opposite to the tank is such that the joint surface 16a of the concave portion 16 of one molding plate 9 has the joint surface 16a of the concave portion 16 of the other molding plate 3 and The tip 17a of the convex portion 17 of the molding plate 3 is joined to the tip 17a of the convex portion 17 of the other molding plate 3. That is,
By this joining, one convex portion 17 and the other convex portion 17 are connected and connected to each other to form a single ridge having a flat surface, and the surface contact is removed during storage in the heat exchanger storage case to seal. Improves the effect and prevents air leakage. Further, since the joining is the abutting joining of the joining surfaces at the same level, the correction work can be easily performed by moving the forming plate 3 by the correcting operation from the lateral direction. This is a great advantage in automation.

Then, at the time of temporary assembly, it is fixed with a jig, put in the furnace, and brazed in the furnace. Therefore, a compressive load may be applied, for example, in the stacking direction of the heat exchanger during temporary assembly, during fixing with a jig or the like, or during brazing in a furnace, but the joint 15 has a concavo-convex structure and is therefore strong. The initial shape is unlikely to be deformed.

(Effects of the Invention) As described above, according to the present invention, since the joint portion of the tube element on the side opposite to the tank is uneven, the strength can be improved.

Further, since the projections of the joints are joined together to form a ridge having a flat surface on the outer surface, when the heat exchanger housing case is housed, it becomes surface contact, the sealing property is improved, and there is an effect of preventing air leakage. .

Furthermore, since the joint portion is abutting joints at the same level on the joint surfaces, the molding plate can be moved by a correcting operation from the lateral direction, which facilitates the correcting operation and has a great advantage in automation.

[Brief description of drawings]

FIG. 1 is a front view showing an entire heat exchanger showing an embodiment of the present invention, FIG. 2 is a bottom view of the same as above, FIG. 3 is a front view of a molding plate, FIG. 4 is a sectional view of the same, 5 is a perspective view of the molding plate in the vicinity of the joint, FIG. 6 is a perspective view showing the jointed state, FIG. 7 is a view A in FIG. 5, and FIG. 8 is an arrow in FIG. It is a partial development view of a view A. 1 ... Tube element, 2 ... Fin, 3 ... Forming plate, 4a, 4b ... Tank, 5 ... Heat exchange medium passage, 1
5 ... Joined part, 16 ... Recessed part, 17 ... Convex part, 17a ... Joined surface.

Claims (1)

[Claims] Claims: 1. Two tanks at one end side, a tube element having a heat exchange medium passage in the remaining portion is constituted by two flat plate-shaped forming plates, and the tube elements and fins are alternately laminated. In the laminated heat exchanger, a joint is formed on the side of the molding plate opposite to the tank, the concave and the convex being alternately formed along the peripheral edge of the molding plate. In addition, a laminated surface is provided in which a joint surface in the same direction as the forming plate is provided, and the joint surfaces of the joint portions are abutted on the anti-tank side of adjacent tube elements so that the convex portions are continuous in the laminating direction. Type heat exchanger.