KR20050110308A - Oil cooler for car - Google Patents

Abstract

In order to increase the contact area with the oil as a whole and to cool the oil more quickly at the beginning, the cylindrical inner tube, the outer circumferential surface of the inner tube are wrapped at a predetermined interval, and an inlet hole through which the oil is introduced and an outlet hole through which the oil is discharged Both ends are connected to both ends of the inner tube and sealed, the central tube is installed in the remaining portion except for both ends where the inlet and outlet holes are formed between the inner tube and the outer tube; An automotive oil cooler including cooling fins respectively installed between exteriors, and inlet and outlet pipes respectively assembled to inlet and outlet holes of the exterior.

Description

Oil Cooler for Cars {Oil Cooler for Car}

The present invention relates to an oil cooler for automobiles, wherein a central pipe is installed between double pipes to divide a space in which oil is transferred into two parts, and a cooling fin is installed in each compartment to increase the contact area with oil as a whole. It relates to an automotive oil cooler configured to cool the oil more quickly.

In general, an oil cooler is a device used for cooling transmission oil in a vehicle, and is composed of a small heat exchanger, and is classified into an air cooling type for cooling in air and a water cooling type installed in a radiator for cooling.

In the above water-cooled oil cooler is inserted into the radiator tank is installed, it consists of a double pipe and the heat exchange is made in contact with the radiator coolant from the inside and outside to cool the transmission oil.

The conventional oil cooler is formed of a double tube consisting of an inner tube and an outer tube, and a cooling fin is installed between the inner tube and the outer tube to improve the cooling efficiency by widening the contact area of oil.

In addition, the conventional oil cooler assembles an inlet pipe through which oil is introduced from the transmission and an outlet pipe through which cooled oil is discharged to the transmission.

The oil cooler as described above is made of a metal such as copper or aluminum having high thermal conductivity, and in the case of water-cooling, the oil cooler is continuously made of copper because it has excellent corrosion resistance.

The conventional oil cooler made as described above has a limitation in cooling efficiency because oil is cooled by contacting the outer circumferential surface of the inner tube and the inner circumferential surface of the inner tube and the cooling fin while passing between the inner tube and the outer tube.

On the other hand, as the oil cooler flows into the space between the inner pipe and the exterior through the inlet pipe, the oil cooler is rapidly cooled in the early part (the end of the inlet pipe) and then the middle part (between the inlet pipe and the outlet pipe) and the latter part. It shows a cooling pattern in which the cooling of the oil proceeds slowly toward the (end of the exit pipe side).

Therefore, it is one of the important tasks to improve the cooling efficiency is to configure the automotive oil cooler to show the cooling pattern that the cooling proceeds faster at the beginning.

The present invention has been made in view of the above points, in the space between the inner tube and the exterior of the space between the two ends of the oil inflow and outflow at both ends are divided into two parts through the central pipe and the cooling fin for each compartment It is an object of the present invention to provide an automotive oil cooler which increases the contact area of the oil as a whole and rapidly cools down at the beginning.

Automotive oil cooler proposed by the present invention is a cylindrical inner tube, the outer circumferential surface of the inner tube is wrapped at a predetermined interval and the oil inlet and oil discharge port is formed and both ends are both ends of the inner tube The outer tube is sealed in connection with the end portion, the central tube is installed between the inner tube and the outer tube, the cooling tube is installed respectively between the central tube and the inner tube and the central tube, and assembled into the inlet and outlet holes of the exterior, respectively And an inlet pipe and an outlet pipe.

The inlet and outlet holes formed in the exterior are bent to protrude outward corners to form a coupling portion, and the coupling portion is screwed or brazed with the inlet and outlet pipes to be welded and fixed.

The coupling portion may be formed by inserting and brazing a cylindrical member through which a central axis line passes through the inlet hole and the outlet hole.

The central tube is installed at the remaining portions except both ends of the inlet and outlet holes formed between the inner tube and the outer tube.

The central tube may be formed by rolling a metal plate roundly in a cylindrical shape.

It is also possible to form a plurality of holes in the central tube at predetermined intervals.

Next, a preferred embodiment of an oil cooler for a vehicle according to the present invention made as described above will be described in detail with reference to the accompanying drawings.

First, an embodiment of the automotive oil cooler according to the present invention, as shown in Figures 1 to 3, the inner tube 2 of the cylindrical, and the outer peripheral surface of the inner tube (2) at a predetermined interval to wrap the oil is introduced An inlet hole 12 and a discharge hole 14 through which oil is discharged are formed, and both ends thereof are connected to both ends of the inner tube 2 to seal the outer part 10, and the inner tube 2 and the outer part ( The central tube 5 installed between the 10, the central tube 5 and the inner tube (2) and the cooling fins (6) respectively provided between the central tube (5) and the exterior (10), and the exterior (10) And an inlet pipe 20 and an outlet pipe 30 which are assembled to the inlet hole 12 and the outlet hole 14, respectively.

In the above, the inner tube (2), the outer tube (10), the central tube (5), the cooling fins (6), the inlet pipe (20), the outlet pipe (30) are made of aluminum, copper, stainless steel or alloys thereof. .

As shown in FIGS. 1 and 2, the space between the inner tube 2 and both ends of the outer tube 10 expands both ends of the inner tube 2 to form an expansion tube 3. It seals by brazing in the state which contacted the inner surface of (10).

In addition, the space between both ends of the inner tube 2 and the exterior 10 is sealed by inserting a ring-shaped cap 8 at both ends and performing brazing, as shown in FIG. It is also possible.

Although not shown in the drawings, the space between the inner tube 2 and both ends of the outer tube 10 expands both ends of the inner tube 2 to form the expansion tube 3, and both sides of the outer tube 10. It is also possible to seal by reducing the ends to perform brazing in a state where both ends are brought into close contact with each other.

As shown in FIGS. 1 and 2, one end of the hollow cylindrical member is inserted into the inlet hole 12 and the outlet hole 14 formed in the outer casing 10 and is fixed by welding through brazing. Coupling portions 13 and 15 are formed.

The inlet pipe 20 and the outlet pipe 30 are inserted into the coupling parts 13 and 15 and brazed by welding.

In the oil cooler for an automobile according to the exemplary embodiment of the present invention as described above, as shown in FIG. 5, the inlet hole 12 and the outlet hole 14 formed in the exterior 10 are bent outward to protrude corners. It is possible to form the engaging portion 13, 15 is coupled to the inlet pipe 20 and the outlet pipe 30.

Although not shown in the drawings, the coupling parts 13 and 15 and the inlet pipe 20 and the outlet pipe 30 may be screwed together. That is, it is possible to form female threads on the coupling parts 13 and 15, and to form male threads coupled to the female threads on the inlet pipe 20 and the outlet pipe 30.

In the above, the coupling parts 13, 15, the inlet pipe 20, and the outlet pipe 30 may be brazed and welded.

As shown in FIG. 5, the inlet pipe 20 and the outlet pipe 30 may be integrally formed by integrally forming an insertion part 22 inserted into the coupling part 13 and the inner side of the outlet pipe 30. It is possible.

In addition, the inlet pipe 20 and the outlet pipe 30, the flange portion 26 to form an assembly groove 24, which is a space in which the coupling portion 13, 15 is inserted between the insertion portion 22 and ) Is formed.

And the portion adjacent to the inlet hole 12 and the outlet hole 14 of the exterior 10 in contact with the flange portion 26 of the inlet pipe 20 and the outlet pipe 30 to have a wide contact area The joining surface 11 which consists of is formed.

The joining surface 11 may be formed by embossing so as to protrude from the inside to the outside.

When the joint surface 11 is formed to protrude from the inside to the outside as described above, the end surface of the insertion portion 22 of the inlet pipe 20 and the outlet pipe 30 protrudes inwardly than the inner surface of the exterior (10) of the fluid The flow can be prevented by increasing the flow resistance.

And the assembly groove 24 is formed by setting the width corresponding to the thickness of the coupling portion 13, 15, it is preferable to set in view of the tolerances and assembly of the coupling portion 13, 15. Do.

The insertion portion 22 is formed to be the same or slightly longer than the length of the coupling portion 13, 15 is configured to increase the area in contact with each other.

Since the insertion part 22 is in contact with the inner side of the coupling part 13 and 15 in the above, the contact length is further increased by the thickness of the exterior 10 as compared with the outer side of the coupling part 13 and 15. It can be formed long.

Therefore, even when the thickness of the exterior 10 is formed thin, it is possible to ensure sufficient contact length between the insertion portion 22 and the coupling portion 13, 15.

In the above description, the coupling parts 13 and 15 are bent outwardly, but the present invention is not limited thereto, and the joining surfaces 13 and 15 are not protruded outward to form the joint surface ( Embossed in the same plane as 11) to protrude and insert the insertion part 22 of the inlet pipe 20 and the outlet pipe 30 into the inlet hole 12 and the outlet hole 14 and then press or dedicated equipment It is also possible to maintain the assembled state by caulking using.

As described above, when the inserting portion 22 of the inlet pipe 20 and the outlet pipe 30 is inserted into the inlet hole 12 and the outlet hole 14 and coked, it moves during passage or storage during the brazing furnace. The inlet pipe 20 and the outlet pipe 30 can be prevented from being separated from the appearance 10, and it is possible to minimize welding defects and the like.

As shown in FIGS. 1 to 3, the central tube 5 is formed using a cylindrical tube similarly to the inner tube 2 and / or the exterior 10.

As shown in Fig. 6, the central tube 5 is formed by rolling the metal plate 5a round in a cylindrical shape so that both edges in the width direction are in contact with each other.

The metal plate 5a can maintain the cylindrical shape by fixing both edges abutted by welding or the like.

In the metal plate 5a forming the center tube 5, as shown in Fig. 6, it is possible to form holes 5b at predetermined intervals.

Although not shown in the drawing, the center tube 5 is formed by bending both edges in the width direction of the metal plate 5a outward over the entire length thereof so that the protruding portions touch each other or one of the protruding portions surrounds the other. It is also possible to fix it by forming it in a shape of "k" and performing welding, caulking, or the like.

An inner tube 2 or an outer tube 10, a central tube 5, a cooling fin 6, an inlet pipe 20, and an outlet pipe 30 constituting an embodiment of the oil cooler for automobiles according to the present invention made as described above. ), The coupling portion 13, 15 is made of a metal material having a relatively high strength and excellent corrosion resistance, such as aluminum, copper, stainless steel.

Two or more of the inner tube (2) or the outer tube (10), the central tube (5), the cooling fins (6), the inlet pipe (20), the outlet pipe (30), the coupling part (13), and the like (15) are welded to each other. When the fixing is made through the same material is used.

In the above, a preferred embodiment of an oil cooler for an automobile according to the present invention has been described, but the present invention is not limited thereto, and various modifications can be made within the scope of the claims and the detailed description of the invention and the accompanying drawings. This also falls within the scope of the present invention.

According to the oil cooler for cars according to the present invention made as described above, the central pipe is installed in the space between the inner tube and the outer tube which is a passage through which the oil is transferred, and the triple tube structure in which the cooling fin is installed between the central tube and the inner tube and the central tube and the outer tube. Therefore, the contact area of the oil is increased as a whole. Therefore, heat exchange between the radiator coolant and the transmission oil is effective.

And as the oil is introduced into one end portion between the inner tube and the exterior through the inlet pipe, the branch is bifurcated by the central tube and the oil is transferred to the outlet pipe so that the cooling is performed. Therefore, the cooling efficiency is improved.

According to the oil cooler for cars according to the present invention made as described above, it is easier to manufacture than the automobile oil cooler of the structure in which the cylindrical tube or the hollow tube is arranged in parallel to connect the productivity is improved and the manufacturing cost is also reduced. .

According to the oil cooler for automobiles according to the present invention made as described above, it is possible to manufacture the central tube using a plate material, thereby reducing the manufacturing cost. Furthermore, the hole is formed easily and simply in the plate during the manufacture of the central tube provides an effect of improving the heat exchange efficiency.

1 is an exploded perspective view showing an embodiment of an automotive oil cooler according to the present invention.

Figure 2 is a cross-sectional view showing an embodiment of an automotive oil cooler according to the present invention.

3 is a cross-sectional view taken along the line A-A of FIG.

4 is a partially enlarged cross-sectional view illustrating a state in which an inner tube and an outer are sealed using a cap in an embodiment of an oil cooler for an automobile according to the present invention.

Figure 5 is a longitudinal cross-sectional view showing the assembled state of the inlet pipe and the outlet pipe in one embodiment of the automotive oil cooler according to the present invention.

Figure 6 is a perspective view showing a process for producing a central tube using a metal plate in one embodiment of an automotive oil cooler according to the present invention.

7 is a perspective view illustrating a process of manufacturing a central tube in which holes are formed at predetermined intervals using a metal plate in one embodiment of an oil cooler for an automobile according to the present invention.

Claims (5)

Cylindrical inner tube, Wraps the outer circumferential surface of the inner tube at a predetermined interval and forms an inlet hole through which oil is introduced and a discharge hole through which oil is discharged, and both ends are connected to and sealed at both ends of the inner tube; A central tube installed between the inner tube and the exterior; Cooling fins installed between the central tube and the inner tube and the central tube and the exterior, respectively; An oil cooler for an automobile including an inlet pipe and an outlet pipe respectively assembled to the inlet and outlet holes of the exterior. The method according to claim 1, The central tube is an automobile oil cooler installed in the remaining portions except the both ends of the inlet and outlet holes formed between the inner tube and the exterior. The method according to claim 1, The central tube is an automobile oil cooler formed by rolling a metal plate in a round shape. The method according to any one of claims 1 to 3, The oil cooler for cars to form a hole in the central tube at predetermined intervals. The method according to claim 1 or 2, In the inlet and outlet holes formed in the outer appearance to bend the corners to the outside to protrude or insert a cylindrical member penetrating the center axis line and brazing to form a coupling portion, The oil cooler for automobile is coupled to the inlet pipe and the outlet pipe is screwed or brazed by welding.