KR200340824Y1 - Oil Cooler - Google Patents

Abstract

The present invention can be expected to increase the heat dissipation and decrease the pressure drop by setting the appropriate design value for the tube of the oil cooler with the oil having different physical properties than the refrigerant as a heat exchange medium,

Reduce oil flow resistance to improve the cooling performance of the oil, reduce the number of parts and simplify the structure, improve the manufacturability and productivity, reduce the manufacturing cost, reduce the weight,

In addition, since the tube is manufactured by extrusion method, even if the height or width of the oil cooler is changed due to the design specification, the width of the oil cooler can be changed very easily because it is only necessary to cut the set length after the tube extrusion process. It is an object of the present invention to provide an oil cooler that can significantly reduce the manufacturing cost of an oil cooler, which is not required to newly design and manufacture a separate mold, because only a tube manufactured by such an extrusion method is laminated.

Oil cooler according to the present invention for achieving the above object is provided with a plurality of inner flow paths formed in the width direction of the main body, and the outer flow paths located on both outermost ends of the inner flow path, a plurality of side by side at regular intervals. A tube arranged to flow oil; A heat dissipation fin disposed between the tubes; A pair of header tanks installed to be communicable at both ends of the tubes and arranged side by side at regular intervals, and the oil moving; And an oil inflow pipe and an oil discharge pipe respectively formed in the header tank to inflow / exhaust the oil, wherein the width A of the main body is greater than or equal to 16 mm and greater than or equal to 56 mm, and the following expression 16 mm ≤ A ≤ 56 mm To satisfy the following, the height (B) of the body is greater than or equal to 1.8mm and meets the following formula 1.8mm≤B≤4mm greater than or equal to 4mm, the height (D) of the heat radiation fin is greater than or equal to 5mm and greater than 10mm The following formula 5mm≤D≤10mm shall be satisfied.

Another embodiment of the present invention for achieving the above object is provided with a plurality of inner flow paths formed in the width direction of the main body, and the outer flow paths located on both outermost ends of the inner flow path, a plurality of them side by side at regular intervals. A tube arranged to flow oil; A heat dissipation fin disposed between the tubes; A pair of header tanks installed to be communicable at both ends of the tubes and arranged side by side at regular intervals, and the oil moving; It is formed in each of the header tank and includes an oil inlet pipe and an oil discharge pipe in which the oil is introduced / discharged, wherein the hydraulic diameter (Dh) of the inner and outer flow path is greater than 0.8mm or greater than or equal to 2.5mm The following formula, characterized in that it satisfies 0.8mm≤Dh≤2.5mm.

Description

Oil Cooler

The present invention relates to an oil cooler, and more particularly, to reduce the flow resistance of the oil to improve the cooling performance of the oil, reduce the number of parts and simplify the structure to improve the manufacturing and productivity to reduce the manufacturing cost, The present invention relates to an oil cooler capable of reducing weight.

In general, the vehicle is provided with an oil cooler for cooling the mission oil, a power transmission medium that converts the rotational force of the engine into kinetic energy and converts this energy back into power.

This transmission oil cooler is divided into internal type and external type according to the cooling method.

In the case of the built-in oil cooler, most of the built-in oil cooler is built in the lower tank of the radiator for cooling the engine coolant and is connected to the transmission so that the transmission oil flows. It has a water-cooled structure that cools the transmission oil by the cooled coolant, and mainly consists of an internal insert type pin and pipe type.

On the other hand, in the case of the external oil cooler, an air-cooling type that cools the transmission oil by air, which is installed in a suitable space among the engine rooms outside the radiator and forcedly blown by a cooling fan (including air naturally flowing into the engine room according to the vehicle driving). It has a structure.

As described above, Korean Patent Publication No. 2002-002885 is an example of the prior art of the external oil cooler of the two types of oil cooler.

The prior art will be described with reference to FIG. 1 as follows.

As shown, the oil cooler 10 is formed by stacking a plurality of tube plates 13 having upper and lower plates 11 and 12 joined to each other and having flow paths therein.

An inner pin 14, which serves as a resistor against flowing fluid, is embedded in the flow path of the tube plate 13.

The heat dissipation fin 15 through which air passes is interposed between the tube plates 13.

Referring to the flow of the transmission oil in the oil cooler configured as described above are as follows.

After the transmission oil flows into the inlet port 16, the transmission oil moves into the upper and lower tank portions 11a and 12a which are formed symmetrically at the ends of the upper and lower plates 11 and 12 to form one tank portion. Then, in the course of passing through the inner fin 14 while flowing in the flow path of the tube plate 13, after passing through heat exchange with the air passing through the heat radiating fin 15, it is cooled through the outlet port (not shown) again into the transmission To return.

However, the oil cooler of the prior art configured as described above has the following problems.

First, since the transmission oil has to pass through the inner pin 14 while moving in the flow path formed in the tube plate 13, as the oil flow resistance is increased, the temperature of the oil cannot be lowered below a certain value, thereby cooling the transmission oil. There was a problem of lowering.

Second, the oil cooler of the prior art has a large number of parts, such as the upper and lower plates 11 and 12, the inner fin 14, and the heat dissipation fin 15, not only increases the weight, but also increases the number of parts. There was also a problem that the production cost is lowered due to the decrease in productivity.

Third, in the prior art, when changing the height or width of the oil cooler according to the design specification, a mold for manufacturing the upper and lower plates 11 and 12 constituting the tube plate 13 must be newly designed and manufactured. There is an inconvenience, due to this there was also a problem that costs a lot to produce a new mold.

Fourth, in the case of an oil cooler, oil is used as a heat exchange medium, and such oils generally have different physical properties unlike general refrigerants. That is, since oil has high viscosity, it affects heat dissipation amount and flow path resistance, which are major factors of actual vehicle performance. Therefore, it is necessary to design a tube that minimizes the pressure drop amount (euro resistance) of the oil and increases the amount of heat dissipation.

The present invention was devised to solve the above problems, by setting an appropriate design value for the tube of the oil cooler with the oil having a different physical properties than the refrigerant as a heat exchange medium can be expected to increase the amount of heat dissipation and decrease the pressure drop, Reduce oil flow resistance to improve the cooling performance of oil, reduce the number of parts and simplify the structure, improve manufacturability and productivity, reduce manufacturing costs, reduce weight, and extrude tubes Since the design specifications are changed and the height or width size of the oil cooler is changed, the width of the oil cooler can be changed very easily by simply cutting the set length after the tube extrusion process. Since only the tubes produced are laminated, separate molds To provide an oil cooler, which can greatly reduce the production cost of the oil cooler are not required to be designed and manufactured for the purpose.

1 is a partially exploded perspective view of an oil cooler according to the prior art.

Figure 2 is an external perspective view of the oil cooler according to the present invention.

Figure 3 is a perspective view showing the appearance of the tube according to an embodiment of the configuration of the oil cooler of the present invention.

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

Figure 5 is a laminated state of the tube and the heat dissipation fin viewed from the side of the oil cooler of the present invention.

6 is a graph showing a change in heat dissipation according to the tube width of the present invention.

7 is a graph showing the pressure drop of the oil according to the tube width of the present invention.

8 is a graph showing a change in heat dissipation according to the height of the tube of the present invention.

9 is a graph showing a change in the pressure drop of the oil according to the height of the tube of the present invention.

10 is a graph showing a change in pressure drop according to the ratio of the hydraulic diameter of the present invention.

11 is a graph showing a change in heat radiation amount according to the heat radiation fin height of the present invention.

<Description of the symbols for the main parts of the drawings>

110: oil inlet pipe

220: oil discharge pipe

200: header tank

300 tube

320: inner channel

330: outer channel

400: heat dissipation fin

Oil cooler according to the present invention for achieving the above object is provided with a plurality of inner flow paths formed in the width direction of the main body, and the outer flow paths located on both outermost ends of the inner flow path, a plurality of side by side at regular intervals. A tube arranged to flow oil; A heat dissipation fin disposed between the tubes; A pair of header tanks installed to be communicable at both ends of the tubes and arranged side by side at regular intervals, and the oil moving; And an oil inflow pipe and an oil discharge pipe respectively formed in the header tank to inflow / exhaust the oil, wherein the width A of the main body is greater than or equal to 16 mm and greater than or equal to 56 mm, and the following expression 16 mm ≤ A ≤ 56 mm To satisfy the following, the height (B) of the body is greater than or equal to 1.8mm and meets the following formula 1.8mm≤B≤4mm greater than or equal to 4mm, the height (D) of the heat radiation fin is greater than or equal to 5mm and greater than 10mm The following formula 5mm≤D≤10mm shall be satisfied.

Another embodiment of the present invention for achieving the above object is provided with a plurality of inner flow paths formed in the width direction of the main body, and the outer flow paths located on both outermost ends of the inner flow path, a plurality of them side by side at regular intervals. A tube arranged to flow oil; A heat dissipation fin disposed between the tubes; A pair of header tanks installed to be communicable at both ends of the tubes and arranged side by side at regular intervals, and the oil moving; It is formed in each of the header tank and includes an oil inlet pipe and an oil discharge pipe in which the oil is introduced / discharged, wherein the hydraulic diameter (Dh) of the inner and outer flow path is greater than 0.8mm or greater than or equal to 2.5mm The following formula, characterized in that it satisfies 0.8mm≤Dh≤2.5mm.

Hereinafter, with reference to the accompanying drawings a preferred embodiment of the oil cooler according to the present invention in detail as follows.

Figure 3 is a perspective view showing the appearance of the tube according to an embodiment of the configuration of the oil cooler of the present invention, Figure 4 is a cross-sectional view of the line "AA" of Figure 3, Figure 5 is a side view of the oil cooler of the present invention 6 is a graph showing a change in heat dissipation amount according to a tube width of the present invention, and FIG. 7 is a graph showing a pressure drop amount of oil according to a tube width of the present invention, and FIG. 9 is a graph showing a change in heat dissipation amount according to the tube height of the present invention, Figure 9 is a graph showing a change in the pressure drop amount of the oil according to the tube height of the present invention, Figure 10 is the pressure drop amount according to the ratio of the hydraulic diameter of the present invention Figure 11 is a graph showing a change, Figure 11 is a graph showing a change in the amount of heat dissipation according to the heat radiation fin height of the present invention.

As shown in FIG. 2, the oil cooler according to the present invention includes a pair of header tanks 200 having a flow path formed therein to allow oil to pass therethrough, and a plurality of tubes 300 for moving the oil. It comprises a plurality of heat dissipation fins 400 interposed between the tubes 300, respectively.

Each of the header tanks 200 is provided with an oil inflow pipe 210 and an oil discharge pipe 220 through which the oil flows in and out.

Reference numeral 230 is an upper and lower support, and 240 is a bracket for installing the oil cooler in the engine room.

As shown in FIG. 3, the tube 300 includes a flat body 350 having a predetermined length in the longitudinal direction (X axis), the height direction (Y axis), and the width direction (Z axis), respectively.

A refrigerant passage 340 penetrating the inside of the main body 350 is formed along the longitudinal direction of the main body 350.

The refrigerant passage 340 includes a plurality of inner passages 320 and a pair of outer passages 330 respectively provided on both ends of the main body 350.

3 to 5, the inner channel 320 is formed in a shape having a rectangular cross section, and more preferably in a rectangular shape.

3 and 5, the outer channel 330 is formed in a substantially rectangular shape, and the shape of the closing wall adjacent to both ends in the width direction of the main body 350 is the width of the main body 350. It is formed similarly to the shape of both ends in the direction.

It is preferable that the width A of the main body 350 is designed to satisfy the following formula 16mm ≦ A ≦ 56mm which is equal to or larger than 16mm and equal to or smaller than 56mm.

As described above, as the width (A) of the present design, as shown in the graph shown in Figure 6, it can be seen that the heat dissipation amount (Q) increases in the interval of 16mm ~ 56mm. As shown in FIG. 7, it can be seen that the pressure drop amount dP of the oil gradually decreases in a section of 16 mm to 56 mm.

In addition, the present invention is preferably designed so that the height (B) of the main body 350 satisfies the following formula 1.8mm≤B≤4mm greater than or equal to 1.8mm and greater than or equal to 4mm.

As described above, as the height B of the present invention is designed, as shown in the graph of FIG. 8, it can be seen that the heat dissipation amount Q is gradually increased in a section of 1.8 mm to 4 mm. Likewise, it can be seen that the pressure drop amount (dP) of the oil gradually decreases in the range of 1.8 mm to 4 mm.

And, the height (D) of the heat radiation fin 400 is preferably designed to satisfy the following equation 5mm≤D≤10mm greater than or equal to 5mm and greater than or equal to 10mm.

As described above, as the design of the present invention, as shown in the graph shown in Figure 11 it can be seen that the heat radiation amount Q is gradually increased in the section of 5mm ~ 10mm.

On the other hand, the width (A) of the main body 350 in the range of the numerical limitation as described above to satisfy the following formula 16mm≤A ≤40mm greater than or equal to 16mm and greater than or equal to 40mm, the height of the main body 350 (B) is equal to or greater than 1.8mm and less than or equal to 3.5mm to satisfy the following formula 1.8mm≤B≤3.5mm, the height (D) of the heat radiation fin 400 is greater than or equal to 6mm and greater than 9mm It is more preferable to satisfy the following small expression 5 mm D 10 mm.

On the other hand, the present invention in addition to the embodiment as described above, the hydraulic diameter (Dh) of the inner, outer flow path 320, 330 is greater than or equal to 0.8mm and greater than or equal to 2.5mm, the following formula, 0.8mm≤Dh≤ It can be designed to satisfy 2.5mm.

As described above, it can be seen that the ratio of the hydraulic diameter Dh of the present invention is increased in the heat dissipation amount Q in a section of 0.8 mm to 2.5 mm, as shown in FIG. 10, and the pressure drop dP decreases. Able to know.

On the other hand, the hydraulic diameter Dh of the inner and outer flow paths 320 and 330 is more preferably greater than or equal to 1 mm and greater than or equal to 2.2 mm, and more preferably satisfying 1 mm ≦ Dh ≦ 2.2 mm.

As described above, if the present invention satisfies the above equations, the flow path resistance of the oil is formed within an appropriate range without increasing the flow path resistance of the oil as in the prior art, and the extrusion process is performed during the tube manufacturing process. Increasing the extrusion rate at the time can fundamentally prevent the formation of pin holes in the outer surface of the tube.

And, by setting the hydraulic diameter in the above-described range, the heat dissipation performance can be improved, such as heat exchange with the outside air passing through the heat dissipation fin 400 can be improved, and the oil cooling effect can be expected.

When the oil flows in the oil cooler of the present invention configured as described above with reference to Figure 6 as follows.

First, the oil introduced into the oil inflow pipe 210 flows into the header tank 200 located on the left side of the drawing, and then moves along the inner and outer flow paths 320 and 330 formed in the respective tubes 300. Next, gathered in the header tank 200 located on the opposite side.

Thereafter, the oil collected into the header tank 200 (located on the right side of the drawing) is returned to the transmission through the oil outlet pipe 220.

Here, the oil passes through the inner and outer flow paths 320 and 330 of the tube 300, and while the flow rate is decelerated, it is heat-exchanged with the air passing through the heat dissipation fin 400 to cool down a predetermined value from the initial inlet temperature.

As described above, according to the oil cooler according to the present invention, it is possible to expect an increase in heat dissipation and a decrease in pressure drop by setting an appropriate design value for the tube of the oil cooler having oil having different physical properties than the refrigerant as a heat exchange medium. It is possible to reduce the flow resistance of oil to improve the cooling performance of the oil, to reduce the number of parts and to simplify the structure, to improve the manufacturing and productivity to reduce the manufacturing cost, and to reduce the weight.

In addition, the present invention is because the tube is produced by the extrusion method, even if the design specification is changed and the height or width size of the oil cooler is changed, it is only easy to change the width of the oil cooler since it is only necessary to cut by the set length after the tube extrusion process. Since it is possible to stack the tubes produced by such an extrusion method, there is an advantage that can significantly reduce the production cost of the oil cooler that does not need to design and manufacture a separate mold as in the prior art.

Claims (4)

A plurality of inner passages 320 formed in the width direction of the main body 350 and outer passages 330 located at both outermost ends of the inner passage 320 are provided at a predetermined interval so that the plurality of oil passages are arranged side by side at regular intervals. A tube 300 for flowing; A heat dissipation fin 400 disposed between the tubes 300; A pair of header tanks 200 installed to be communicable at both ends of the tubes 300 and arranged side by side at a predetermined interval, and in which the oil moves; It is formed in each of the header tank 200 includes an oil inflow pipe 210 and the oil discharge pipe 220, the oil is introduced / discharged, The width A of the main body 350 satisfies the following formula 16mm≤A≤56mm greater than or equal to 16mm and greater than or equal to 56mm, The height (B) of the main body 350 satisfies the following formula 1.8mm≤B≤4mm greater than or equal to 1.8mm and greater than or equal to 4mm, The height (D) of the heat dissipation fin 400 is an oil cooler, characterized by satisfying the following formula 5mm≤D≤10mm greater than or equal to 5mm and greater than or equal to 10mm. A plurality of inner passages 320 formed in the width direction of the main body 350 and outer passages 330 located at both outermost ends of the inner passage 320 are provided at a predetermined interval so that the plurality of oil passages are arranged side by side at regular intervals. A tube 300 for flowing; A heat dissipation fin 400 disposed between the tubes 300; A pair of header tanks 200 installed to be communicable at both ends of the tubes 300 and arranged side by side at a predetermined interval, and in which the oil moves; It is formed in each of the header tank 200 includes an oil inflow pipe 210 and the oil discharge pipe 220, the oil is introduced / discharged, The hydraulic diameter Dh of the inner and outer flow paths 320 and 330 is equal to or larger than 0.8 mm and equal to or smaller than 2.5 mm, and the oil cooler may satisfy 0.8 mm ≤ Dh ≤ 2.5 mm. . The method of claim 1, The width A of the main body 350 satisfies the following formula 16mm≤A≤40mm greater than or equal to 16mm and greater than or equal to 40mm, The height B of the main body 350 satisfies the following formula 1.8mm≤B≤3.5mm greater than or equal to 1.8mm and greater than or equal to 3.5mm, The height (D) of the heat dissipation fin 400 is an oil cooler, characterized by satisfying the following formula 5mm≤D≤10mm greater than or equal to 6mm and greater than or equal to 9mm. The hydraulic diameter Dh of the inner and outer flow paths 320 and 330 is greater than or equal to 1 mm and greater than or equal to 2.2 mm, and satisfies 1 mm ≦ Dh ≦ 2.2 mm. Oil cooler.