KR940004230Y1 - Oil cooler - Google Patents

Abstract

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Description

Tubular oil cooler of radiator for internal combustion engines

1 is a front view of a radiator for an internal combustion engine.

Figure 2 is a partial cutaway front view of an applied tubular oil cooler of the present invention.

3 is a partial cutaway front view of a tubular oil cooler to illustrate the prior art.

* Explanation of symbols for main parts of the drawings

1: tubular oil cooler 2: inner tube

3: appearance 4: inner pin

5: joint 6: pipe

The present invention relates to a tubular oil cooler used in a radiator for an internal combustion engine, and in particular, to reduce the weight of the oil cooler, and to easily weld each part of the oil cooler together to improve heat dissipation effect and durability. .

As is well known, the radiator for an internal combustion engine is equipped with an upper tank (HT) into which coolant flows in as shown in FIG. 1, and a lower tank (LT) equipped with a tubular oil cooler to transfer heat of oil to the coolant to supply the coolant to the engine (LT). In order to cool the oil is composed of a core (C) to radiate the cooling water between.

Such a radiator for an internal combustion engine transfers heat of oil to coolant to supply coolant to the engine. At this time, the oil cooler should have good durability as well as oil cooling efficiency, and should not have potential corrosion when assembling with the radiator.

However, in the related art, the tubular oil cooler 21 of the radiator for an internal combustion engine is inserted such that the inner pin 24 is simply positioned between the inner tube 22 and the exterior 23 as shown in FIG. 3, and then one side of the inner tube 22. Press and expand using an extension pipe, etc., so that both sides of the inner pin 24 are in contact with the inner tube 22 and the outer shell 23, assembled, and a joint 25 is installed at the periphery of the outer shell 23 for the joint. The lower surface of (25) was welded, and only spots of the inner tube 22 and the outer end 23 were spot welded separately.

In addition, the joint 25 installed and welded at the periphery of the exterior 23 was manufactured by welding a pipe 26 connecting the oil inlet and outlet.

In this way, the inner pin 22 is placed on the inner tube 22 and the outer tube 23 to press the expansion tube or the like on one side of the inner tube 22 to simply weld the end portions thereof so that both sides of the inner pin 24 are connected to the inner tube 22. Since spot welding is performed only in contact with the exterior 23, the reduction of heat dissipation efficiency and durability is lowered due to the lowering of the contact of the inner pin 24 except the welded portion, and all parts are made of brass or copper. When embedded in a radiator of the type, the radiator is made of aluminum, so that a potential difference is generated between brass and copper, which promotes corrosion of the tube of the radiator, lowers productivity due to the complexity of the manufacturing process, and adversely affects the weight reduction.

The present invention was devised to solve the above-mentioned conventional drawbacks and problems, and the purpose of the present invention is to assemble each component, etc., the interior of the brazing furnace inner tube, the appearance, the inner pin of the kraft material having a lower melting point than the metal By bonding the (bonding material) and brazing it in the furnace, the durability is increased as well as the heat dissipation effect.

For another purpose, it is possible to prevent the potential difference corrosion between radiator and oil cooler and to improve productivity due to the reduction of work process as well as to reduce the weight and reduce the product by integral brazing.

When the present invention to achieve the above object will be described in detail by the accompanying drawings as follows.

As shown in FIG. 2, an inner pin 4 is inserted between the inner tube 2 and the outer tube 3 of the oil cooler 1. At this time, a clad material (bonding material) having a lower melting point than a base metal is bonded to the outer side of the inner tube 2, the inner side of the outer side 3, and both side surfaces of the inner pin 4.

Then, the inner part of the inner tube 2 is expanded so that only the inner tube 2 is in contact with the outer tube 2 and 3. On the other hand, at the periphery of the exterior 3, the joint 5 is assembled in a fitted state, and the pipe 6 for assembling the oil inlet and outlet is assembled to the joint 5.

At this time, each of the components is preferably made of aluminum material for preventing the potential difference corrosion and light weight with the radiator.

In addition, the main components of the kraft material are a small amount of copper, iron, manganese, magnesium, zinc, and a large amount of silicon and aluminum.

And each component assembled as described above is configured by brazing integrally inserted into the brazing furnace.

The inner tube (2), the outer tube (3), the inner pin (4), the joint (5), the pipe (6), which are the components of the oil cooler (1) of the present invention configured as described above, are assembled, but the outer and outer parts of the inner tube (2) ( After joining the joint material 5 and the pipe 6 to the inner side of 3) and both sides of the inner pin 4, the kraft material having a lower melting point than the base metal is assembled, inserted into the brazing furnace, and then applied constant heat to the furnace. When the kraft material bonded to both sides of the inner pin 4 and the kraft material bonded to the inner and outer surfaces of the inner and outer surfaces (2) and (3) are melted, they are brazed firmly to the inner and outer surfaces (2) and (3). In addition, since the pipe 6 is integrally assembled to the joint 5 assembled in the state of being fitted around the periphery of the exterior 3, the exterior 3 is also easily brazed integrally with the exterior 3.

As described above, the inner tube, exterior, inner pins, joints, and pipes are melted and brazed integrally in the brazing furnace. Productivity can be further improved by shrinking the process.In addition, the internal and external inner fins, such as integral brazing, increase heat dissipation effect and durability, and use the same material for the radiator. It is a very useful design that can prevent easy potential difference corrosion.

Claims (3)

The inner pin (4) is coupled between the inner tube (2) and the outer tube (3) of the tubular oil cooler (1) in a state of being installed, the contact surface of the inner, outer (2) (3) and inner pin (4) The joints (5) having the melting point (bonding material) having a lower melting point than that of the base metal are bonded to each other, and the joints (5) having the pipes (6) processed therein are assembled into the exterior (2) and assembled into the brazing furnace. A tubular oil cooler of a radiator for an internal combustion engine, wherein the radiator is integrally brazed by inserting a predetermined heat. The tubular oil cooler of an internal combustion engine radiator according to claim 1, wherein the tubular oil cooler (1) is made of aluminum to prevent potential difference corrosion when the tubular oil cooler (1) is assembled to the aluminum radiator, and to reduce the weight of the product. The tubular oil cooler of an internal combustion engine radiator according to claim 1, wherein the kraft material having a lower melting point than the base metal is composed of a small amount of copper, iron, manganese, magnesium, zinc, and a large amount of silicon and aluminum.