KR100744485B1 - Radiator with built-in oil cooler - Google Patents

Abstract

Disclosed is a radiator with an oil cooler. The present invention includes: upper and lower headers connected to both ends of a plurality of tubes; an upper tank coupled to an upper header to form a passage of the first heat exchange medium; and a body having a passage of a second heat exchange medium to heat exchange with the first heat exchange medium. And an oil cooler including an inlet tube and an outlet tube through which the second heat exchange medium flows in and out, and a flange formed on the base thereof, and is coupled to the lower header, and the oil cooler is positioned therein so that the flange unit It includes a lower tank which is injection molded integrally with it in a buried state, and the oil cooler is injection molded integrally with the lower tank, thereby simplifying the coupling structure between the oil cooler and the lower tank, thereby reducing the labor.

Description

Radiator with built-in oil cooler

1 is a front view of the oil cooler built-in radiator according to an embodiment of the present invention,

Figure 2 is a cross-sectional view of the conventional oil cooler and the radiator lower tank is combined,

3 is a cross-sectional view of the oil cooler and the radiator lower tank coupled according to an embodiment of the present invention;

4 is a cross-sectional view showing a molding die used in the injection molding of the invention according to FIG.

Figure 5 is a perspective view of the case in which the inlet and outlet pipes of the oil cooler of the present invention according to FIG.

<Description of reference numerals for main parts of the drawings>

8 ... oil cooler 8d ... flange

16 Lower tank 16a

30 Lower tank mold 40 Lower tank forming space

40a ... supporting space

The present invention relates to an oil cooler built-in radiator, and more particularly, to an oil cooler built-in radiator in which the oil cooler is injection molded integrally with the lower tank.

In general, in an automatic transmission vehicle, an oil cooler cools engine oil of a torque converter or a power transmission system, and is mounted in a tank of a radiator to cool using engine coolant.

Referring to FIG. 2, in a radiator in which a metal oil cooler is built into a synthetic resin lower tank 16, a conventional oil cooler 8 includes a nipple 23 having a flange portion 21 and a threaded portion 22. The lower tank is fastened to the outer wall and protrudes the screw portion 22 into the insertion hole 16a formed in the lower tank 16 to engage the washer 25 and the hexagon nut 26 engaged with the screw portion 22. The oil cooler (8) is closely fixed to (16). In addition, the nipple 23 is inserted into the pipe 27 having the flare nut 28 to braze them, and then the flare nut 28 is tightened and fixed to the screw part 22.

Since the hex nut 26 and the flare nut 28 are coupled to the threaded portion 22 of the nipple, the oil cooler built-in radiator has a problem that the length of the threaded portion 22 is increased and the tank width is increased, thereby securing an assembly space. have.

In addition, since parts such as washers, flare nuts, etc. are additionally required to mount the oil cooler 8 to the lower tank 16, there is a problem in that the structure in the lower tank is complicated and the labor of labor is increased.

In addition, when the inlet tube and the outlet tube of the oil cooler are inserted into the insertion hole in the lower tank, when the inlet tube and the outlet tube do not coincide with the insertion hole, the inlet tube and the outlet tube are bent or broken to leak oil. There is a problem.

The present invention has been made in view of the above, and an object of the present invention is to provide an oil cooler-integrated radiator, in which an oil cooler is integrally injected with a lower tank, thereby reducing the width and weight of the lower tank and reducing labor.

Oil cooler built-in radiator of the present invention for achieving the above object,

Upper and lower headers;

A plurality of tubes connected at both ends thereof to the upper and lower headers;

A heat dissipation fan disposed on an outer surface of the tube;

An upper tank coupled to the upper header to form a passage of a first heat exchange medium;

A main body formed with a passageway of a second heat exchange medium that exchanges heat with the first heat exchange medium, an inlet tube and an outlet tube communicating with the main body to inflow and outflow of the second heat exchange medium, and formed at a base of the inlet tube and the inlet tube An oil cooler including a flange portion; And

The lower tank is coupled to the lower header, the oil cooler is located therein and the lower tank is integrally injection molded with the oil cooler while the flange portion is embedded.

In addition, the outer peripheral surface of the flange portion is characterized in that the knurling surface is formed to improve the coupling force to the lower tank.

In addition, the inlet pipe is characterized in that it is located in a direction opposite to the outlet pipe with respect to the lower tank.

Hereinafter, an oil cooler built-in radiator according to a preferred embodiment of the present invention with reference to the accompanying drawings will be described in detail.

1 and 3, the oil cooler built-in radiator 10 according to an embodiment of the present invention, the upper, lower header (2, 3), and a plurality of tubes connected to both ends of the upper, lower header ( 4), a heat dissipation fan 5 positioned between the tubes, an upper tank 15 coupled with the upper and lower headers to form a passage of the heat exchange medium, and the first heat exchange medium passing through the automatic transmission. An oil cooler 8 for cooling the engine oil (not shown) and a lower tank 16 coupled to the lower header and having the oil cooler 8 positioned therein.

The oil cooler built-in radiator 10 includes a core 1 which has a large heat dissipation area for connecting the upper header 2 and the lower header 3 and dissipating as much heat as possible into the atmosphere. . The core 1 is a tube (4) is inserted into the upper, lower headers (2, 3) coupled to allow the cooling water to pass through, and the heat radiation (5) is installed between the tubes to contact the air Heat exchange with the outside air to reduce the first heat exchange medium of the high temperature cooling water flowing through the tube (4). The upper and lower tanks 15 and 16 coupled to the upper and lower headers are made of synthetic resin, and the upper tank 15 is coupled with an inlet pipe 6 into which high temperature coolant is introduced, and the lower tank 16 is cooled. The outlet pipe 7 through which the coolant flows out is coupled, and the lower tank 16 has a double tube oil cooler 8 for cooling the engine oil of the automatic transmission, that is, the second heat exchange medium. An inlet tube 8b and an outlet tube 8c for introducing and discharging the second heat exchange medium into the lower tank 16 are formed on the outer wall of the oil cooler 8.

Figure 3 is a cross-sectional view of the lower tank and the oil cooler according to the present invention, a line I-I of FIG. Referring to FIG. 3, the oil cooler 8 includes a main body 8a having a double pipe, an inflow pipe 8b and an outflow pipe 8c installed on the outer wall of the main body at predetermined intervals, and the inflow pipe ( 8b) and a flange portion 8d formed at the base of the outlet pipe 8c.

The main body 8a of the oil cooler is provided in the lower tank 16 and has an outer tube 9 and an inner tube 10 having a circular cross section, and an inner pin 11 disposed between the two tubes.

A first heat exchange medium flows through the inner tube 10 of the main body, and the first heat exchange medium exchanges and cools the second heat exchange medium flowing between the inner tube 10 and the outer tube 9. The second heat exchange medium flows between the inner tube 10 and the outer tube 9 through the inlet tube 8b and flows out again through the outlet tube 8c.

At the base of the outflow pipe 8c and the inflow pipe 8b, a disk-shaped flange portion 8d is formed.

Referring to FIG. 4, the lower tank 16 inserts the oil cooler 8 into the lower tank mold 30 forming the lower tank, and the lower tank forming space 40 formed in the lower tank mold 30. Injection molding is carried out by injecting plastic resin into the filling. The lower tank and the oil cooler 8 are integrally injection molded in a state in which the flange portion 8d of the oil cooler is embedded in the lower tank forming space 40. Further, a knurling surface is formed on the outer circumferential surface of the flange portion 8d so that the flange portion 8d is closely coupled to the lower tank during injection molding.

It is preferable that the supporting portion 16a of the lower tank for supporting the body 8a of the oil cooler is formed by injection molding. A supporting part forming space 40a is formed in the lower tank forming space 40 between the inner wall 30a of the lower tank mold and the lower surface of the main body of the oil cooler. The support part 16a of the lower tank is formed by injecting and filling a plastic resin into the support part forming space 40a. This is to prevent the excessive force is applied to the coupling portion of the oil cooler and the lower tank by the support portion 16a of the molded lower tank supports the oil cooler. However, when the thickness of the support 16a of the lower tank becomes excessively thick, cracks may occur due to the difference in heat shrinkage. In order to prevent this, the inner wall 30a of the lower tank mold is formed so that the width of the support portion forming space 40a formed in the lower tank mold matches the width of the other lower tank forming space 40b.

On the other hand, when the oil cooler and the lower tank are manufactured separately and combined with each other, the inlet and outlet pipes of the oil cooler must be formed in the same direction for easy coupling, but when the oil cooler and the lower tank are integrally molded as described above. 5, the inlet pipe (8b) and the outlet pipe (8c) of the oil cooler may be formed by combining in the opposite direction. In this case, the utilization space in the engine room of the vehicle is increased to facilitate the use of space in the engine room.

 As described above, the oil cooler built-in radiator according to the present invention has the advantage of reducing the labor time by simplifying the coupling structure between the oil cooler and the lower tank by injection molding the oil cooler integrally with the lower tank.

In addition, since there is no need for a separate accessory for coupling between the oil cooler and the lower tank, there is an advantage that the overall size and weight of the radiator is reduced.

In addition, the inlet and outlet pipes of the oil cooler can be formed in the opposite direction, so that the utilization space in the engine room of the vehicle is increased, thereby facilitating the use of space in the engine room.

Although the present invention has been described with reference to one embodiment shown in the accompanying drawings, this is merely exemplary, and it will be understood by those skilled in the art that various modifications and equivalent other embodiments are possible. Could be. Therefore, the true scope of protection of the present invention should be defined only by the appended claims.

Claims (3)

Upper and lower headers; A plurality of tubes connected at both ends thereof to the upper and lower headers; A heat dissipation fan disposed on an outer surface of the tube; An upper tank coupled to the upper header to form a passage of a first heat exchange medium; A main body formed with a passage of a second heat exchange medium that exchanges heat with the first heat exchange medium, an inlet tube and an outlet tube communicating with the main body to introduce and discharge a second heat exchange medium, and a base of the inlet tube and the inlet tube. An oil cooler including a formed flange portion; And And a lower tank coupled to the lower header, wherein the oil cooler is positioned therein and is integrally injection molded with the oil cooler while the flange portion is embedded. The method of claim 1, Radiator on the outer peripheral surface of the flange portion is characterized in that the knurling surface is formed to improve the coupling force to the lower tank. The method of claim 1, The inlet pipe is an oil cooler built-in radiator, characterized in that located in a direction opposite to the outlet pipe with respect to the lower tank.

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