JPS60186695A - Heat exchanger - Google Patents

Abstract

PURPOSE:To contrive to save materials and reduce the weight, and heighten the assembly strength of ribs for reinforcement, by a method wherein in a heat exchanger of a car, grooves to which reinforcement ribs are set in are provided inside of recessed grooves for assembling a tank. CONSTITUTION:Separate securing recessed grooves 10, 11 for engagement in the opposite end parts of ribs 9 to the inside of said recessed grooves adjoining to recessed grooves 7 and 8 for assembling tanks which are provided at the periphery of a upper sheet plate 3 and a lower sheet plate 4 are provided locally. The shape of these grooves 10, 11 can be selected most suitably, recessed grooves 10, 11 for securing ribs 9 being independent, thereby said grooves 10, 11 will be able to secure ribs enough even if the depth of grooves are about 0.5mm. at least which is smaller than one half of recessed grooves 7, 8 for assembling tanks.

Description

DETAILED DESCRIPTION OF THE INVENTION Field E 1 The present invention relates to a shell-and-tube heat exchanger used in automobiles and the like.

[Prior art] Heat exchangers such as heaters and radiators installed in automobiles have an upper tank and a lower tank that are made by press-forming copper plates at the upper and lower ends of a core consisting of a group of copper pipes with fins. -The tank is arranged, and the upper end of each pipe is pushed through the tank and fixed liquid-tightly, and the upper tank has a protrusion on the periphery of the upper seat plate, which serves as the bottom wall member, toward the core side. It is assembled by providing a concave groove for the tank to come out, fitting the lower edge of the lid-shaped upper tank that forms the top surface and peripheral wall surface of the tank into this concave groove, and then filling the groove with solder wax. l
c. The lower tank is also created in the same manner as the upper tank, although the positional relationship is reversed. The vertically elongated plate-like ribs, which are used to ensure the structural strength of the entire tank and the fins on both ends during installation and use, are attached to the upper and lower ends of the ribs. It was configured to be hooked and locked onto the core-side edge portions of the protrusions provided on the seat plays 1 and 1 and the lower seat plays (installed on both ends of the seats).

Nowadays, cars are becoming lighter, thinner, shorter, smaller, and more versatile, and there is a strong emphasis on reducing the weight of automobiles, and of course there is no choice but to strongly promote the reduction of manufacturing costs at the same time. Considering the 1@ vessel, one reason is to make the circumferential groove for tank assembly on the i1 tube seat plate and lower seat plate as shallow as possible in terms of material saving and weight reduction. There are some things that have an effect that is hard to ignore. Making this groove shallower also leads to a reduction in the amount of solder solder injected into the groove.

However, if the grooves for tank assembly installed in the upper sheet plays 1-a3 and 1'' are made shallower, the locking force will increase depending on the part of this groove that protrudes toward the core side. A problem arises because the aforementioned reinforcing ribs that are kept in place tend to come off due to some external force.

[Object of the Invention] An object of the present invention is to provide a heat exchanger having the structure as explained in the prior art section, in which an upper tank and a lower tank are
To provide a method for increasing the assembly strength of reinforcing ribs while saving materials and reducing weight by making the tank assembly groove as shallow as possible.

[Structure of the Invention] Mizumoto-Akira's heat exchanger has an upper tank and a lower tank connected to the upper and lower ends of a core consisting of a group of liquid pipes, respectively, by removing the fins, and connecting the upper tank and the lower tank to the upper and lower ends of the core, respectively. In the heat exchanger having a structure in which a reinforcing rib is brought into contact with the upper tank and the lower tank, the upper sheet plate C and the bottom or top surface members of the upper tank and the lower tank are
- Concave grooves for fitting reinforcing ribs in the opposite direction to the grooves are formed inside the grooves for tank assembly provided on the peripheral edge of each earth seat plate.

[Effects of the Invention 1 The heat exchanger of the present invention having the above configuration has the following effects.

b) Upper seat plate and lower seat plate - Unlike conventional assembly methods, the concave grooves for tank assembly provided on the periphery of the seat plate are not involved in locking the reinforcing ribs at all, so they are not necessary for tank assembly. By reducing the depth to a minimum, the plate material can be saved and the number of vehicle eaves can be reduced.

Since the tank assembly groove is shallower, the amount of solder solder injected into this part for maintaining liquid tightness can be reduced.

[Example] Next, the heat exchanger of the present invention will be explained based on an example with dimensions shown in the drawings.

First, the structure of a conventional automobile heat exchanger similar to the present invention will be explained with reference to FIG. 1, which is a partial side cross-sectional view. Corrugated fins 2 are joined to improve heat transfer performance. The upper and lower ends of the liquid passage pipe 1 are inserted through a brass upper sheet plate 3 forming the bottom wall of the upper tank and a brass lower sheet plate 4 forming the top wall of the lower tank, respectively, and solder solder a.
It is fluid-tightly connected to plate 3.4 by. The lid-shaped brass upper tank 5 and lower tank 6 for forming the top wall and side wall surface and the bottom wall surface and side wall surface of the upper tank and the U-ar tank, respectively, are attached to the periphery of the respective seat plate 3.4. A completely liquid-tight upper tank 5 and lower tank 6 are assembled by fitting the lower end edge of the assembly groove 7.8 into the assembly groove 7.8 and filling the gap in the groove with solder solder b.

To explain in more detail the structure of the core A, which is composed of a liquid passage pipe 1 and a cluster of full-gate fins 2, the core A has a thickness of 0.14 mm.
A liquid passing vibrator 1 was created by bending thin brass plates inside and outside of 1111Il into a flat tube shape using a tube mouth ring machine, and an extremely thin strip copper plate with a thickness of 0.05m1i was placed on a fin machine. After hanging to give a corrugated shape, the fins 2 cut to a fixed size are combined in a predetermined arrangement in a core assembly jig, and then passed through a hot blast oven to form a liquid-passing vibrator. The solder wax coated on the surface of fin 1 melts, and the contact surfaces of liquid passing vibrator 1 and fin 2 are fixed, completing assembly into the core.

In this way, the core A, which can be called the heart of the heat exchanger, is extremely weak, so in order to strengthen the overall structure of the tank and protect the fins 2 exposed at both ends of the core A. Alternatively, for convenience in manufacturing, mounting, etc., a steel reinforcing member 19 is brought into contact with the outer surface of the core. Both upper and lower ends of the rib 9 are connected to tank assembly grooves 7 provided in the upper seat plate 3 and lower seat plate 4.
It is hooked onto and engaged with the inner surface of a convex portion 7' formed on the back side of. The contact surface between the rib 9 and the core A is bonded using solder b.

Next, the heat exchanger of the present invention will be explained with reference to FIGS. 2 to 4.
In contact with the tank assembly grooves 7 and 8 provided on the periphery of the seat plate 4, another locking groove 10.11 for fitting both ends of the reinforcing rib 9 is formed locally. It is set up as follows.

Since the tank assembly groove 7.8 is provided over the entire circumference of the tank, it is necessary to make the depth of the groove 7.8 shallow in order to save materials and reduce mold opening. It is effective. On the other hand, although the locking grooves 10.11 of the reinforcing ribs 9 are newly added, they are only installed in one part as shown in Figure 4, so the negative effect is minimal. be. Fifth
Other embodiments of the figures show other shapes of the locking grooves 10.11 of the ribs 9. Ru. Recessed groove 10.1 for locking rib 9
By making the grooves 10 and 1 independent, it is possible to select the optimal shape for the length of the rib 9, so it is half of the tank assembly groove 7.8. The purpose of rib locking can be sufficiently achieved even if the depth is as shallow as 0.5IIllll at least.

[Brief explanation of the drawing]

FIG. 1 is a partial side sectional view of a conventional heat exchanger having a structure similar to that of the present invention, FIGS. 2 to 4 are explanatory views of the heat exchanger of the present invention, and FIG. Perspective view including cross section, 3rd
The figure is a side view of the partial pipe, and Figure 4 is the A- of the lower tank part.
AIIIi direction view, FIG. 5 is a perspective view of another embodiment S of the present invention. In the diagram 1... Liquid passing vibrator 2... Fin 3...
Upper seat plate 4... Lower seat plate 5... Upper tank 6... Lower tank 1.8... Concave groove for tank assembly 9... Reinforcement rib 10.11... Rib section Recessed grooves a, b... Solder solder agent Kenji Ishiguro Figure 1

Claims (1)

[Claims] 1) Remove the fins and attach an upper tank and a lower tank to the upper and lower ends of the core consisting of a group of liquid pipes.
When the tank is connected to the heat exchanger J3, which has a structure in which reinforcing ribs are brought into contact with the outer surface of the upper tank J3 and the bottom or top of the upper tank J3 and the lower tank, A recess fM for fitting a reinforcing rib in the opposite direction to the recessed groove for tank assembly inside the recessed groove for tank assembly provided on the peripheral edge of each of the upper seat plate and the lower seat plate as surface members. A heat exchanger characterized by forming: