KR20090063068A - Transmission oil cooler for automobile - Google Patents

Abstract

A vehicle transmission oil cooler is provided to eliminate fin for heat exchange and reduce costs by protruding a plurality of rails on plates to be diagonally combined with each other. A vehicle transmission oil cooler comprises a tube part(10) provided with an inlet and an outlet on both ends. The tube part includes a tube(11) in which a plurality of plates are combined with two pairs. A plurality of tubes are layered mutually. One end of the plate is covered with a plurality of rails(15) are protruded to enhance heat exchange efficiency. Both ends of the plate are equipped with an inlet and an outlet in order to suck or expel working fluid. The rails are protruded diagonally on the plate.

Description

Transmission oil cooler for automobile

The present invention relates to a transmission oil cooler for an automobile, and more particularly, includes a tube part in which a plurality of plates are stacked to allow a working fluid to flow, and a fitting part coupled to the tube part to communicate with an external radiator tank. Since a plurality of rails protruding in a planar oblique direction on each plate is formed, conventional fins necessary for heat exchange are eliminated, thereby helping to reduce the original feeling, and by forming the shape of the plate and rail in an optimized form, The present invention relates to a transmission oil cooler for automobiles having improved heat dissipation efficiency, which is superior in performance and quality than conventional products.

In general, a radiator for cooling an automobile engine is a heat exchanger for automobiles, and includes a plurality of tubes provided to allow fluid to flow, a plurality of fins coupled between the tubes, and a fluid space to form the tube. It is composed of a header and a tank coupled to communicate with both ends of the, and is a device for dissipating heat generated from the engine of the vehicle to the surroundings using the cooling water.

In addition, the radiator has an additional configuration, which is accommodated in the fluid space consisting of the header and the tank of the radiator, has a separate fluid circulation space in which the transmission oil is introduced and discharged, and by cooling the oil through the configuration as described above It is equipped with a Transmission Oil Cooler to keep the viscosity constant.

That is, the transmission oil cooler is accommodated inside the radiator tank and heat exchange is performed by the cooling water flowing in the tank, thereby cooling the oil.

1 is a perspective view showing a conventional automotive transmission oil cooler, Figure 2 is a side view showing a conventional automotive transmission oil cooler.

As shown in Figure 1 and 2, the conventional transmission oil cooler (1) is to increase the efficiency of the heat exchanger coupled between the plate (2) and the plate (2) and the plate (2) formed in a stacked type It is composed of a heat dissipation fin (3) and a fitting (4) in communication with both end surfaces of the plate (2) is coupled to the external fluid pipe (not shown).

However, the conventional transmission oil cooler 1 is formed by combining a plurality of products, such as the heat sink fins 3, structurally complex, thereby increasing the manufacturing cost is low production efficiency, poor quality due to a number of components There is a problem that the incidence of increases.

Accordingly, the present invention has been made to solve the above conventional problems,

A plurality of plates are stacked to include a tube portion through which a working fluid flows, and a fitting portion coupled to the tube portion to communicate with an external radiator tank, wherein each plate has a plurality of rails protruding in a planar oblique direction. As a result, the conventional fin required for heat exchange is eliminated, and an object of the present invention is to provide an automotive transmission oil cooler which is excellent in reducing the original feeling.

In addition, the present invention has another object to provide a transmission oil cooler for automobiles having excellent performance and quality than conventional products by increasing the heat dissipation efficiency due to heat exchange by forming the shape of the plate and rail in an optimized form.

In order to achieve the above object, the present invention is formed on the inlet and outlet of the tube portion formed at both ends and the inlet / outlet port at both ends so that the working fluid flows therein, one end is connected to the radiator tank to communicate with the tube portion In the automotive transmission oil cooler comprising a fitting portion,

The tube portion is formed by a plurality of plates are coupled to each other two by one tube, each of the plurality of tubes are stacked on each other,

One end surface of the plate is formed with a plurality of protruding rails to increase the heat exchange efficiency, both ends are related to a transmission oil cooler for automobiles, characterized in that the inlet and outlet are formed so that the working fluid flows in / out.

As described above, the transmission oil cooler for automobiles of the present invention includes a tube portion in which a plurality of plates are stacked and a working fluid flows, and a fitting portion coupled to the tube portion and communicating with an external radiator tank. Since a plurality of rails are formed in each plate in a planar oblique direction, the fins required for heat exchange in the past are eliminated, thereby having an excellent effect on reducing the original feeling.

In addition, the present invention by forming the shape of the plate and rail in an optimized form to increase the heat dissipation efficiency due to heat exchange has an excellent effect in terms of performance and quality than conventional products.

The present invention has the following features to achieve the above object.

The present invention is an automobile including a tube portion formed at both ends of the inlet and outlet to the working fluid flow inside, and the inlet / outlet side of the tube portion, one end is connected to the radiator tank and connected to the tube portion In transmission oil cooler for

The tube portion is formed by combining a plurality of plates to each other as a single tube, each of the plurality of tubes are stacked on each other,

One end surface of the plate is formed with a plurality of protruding rails to increase heat exchange efficiency, the inlet and outlet are formed at each end so that the working fluid flows in / out.

And, the rail is characterized in that the plurality of protrusions are formed spaced apart in the oblique direction in the plane of the plate.

In addition, the angle (θ) of the rail is characterized in that 55 to 65 degrees based on the width direction of the plate.

In addition, the height (h) ratio of the rail to the pitch (P) of the rail is characterized in that 0.10 ~ 0.20.

In addition, the inner cross-sectional area (A) ratio of the rail to the inner circumferential length (L) of the rail is characterized in that 0.40 ~ 0.60mm.

The fitting part may include a screw part having a thread formed on an outer circumferential surface and / or an inner circumferential surface of the fitting part such that the coupling member protruding outwardly is connected to the radiator tank;

It is characterized in that it comprises a support portion which is integrally formed at the end of the screw portion and coupled to the tube portion.

In addition, the tube portion of the present invention, the stacking height (TSH) is 10 ~ 50mm, the plate is characterized in that the width is 25 ~ 50mm, the thickness is 0.2 ~ 0.5mm.

The present invention having such a feature will be more clearly described through the preferred embodiment accordingly.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. Prior to this, terms or words used in the specification and claims should not be construed as having a conventional or dictionary meaning, and the inventors should properly explain the concept of terms in order to best explain their own invention. Based on the principle that can be defined, it should be interpreted as meaning and concept corresponding to the technical idea of the present invention.

Therefore, the embodiments described in the specification and the drawings shown in the drawings are not possible in the most preferred embodiment of the present invention, and do not represent all of the technical idea of the present invention, it is possible to replace them at the time of the present application It should be understood that there may be various equivalents and variations in the range.

3 is a perspective view showing a transmission oil cooler for a vehicle according to an embodiment of the present invention, Figure 4 is a cross-sectional view showing a transmission oil cooler for a vehicle according to an embodiment of the present invention, Figure 5 is another embodiment of the present invention 6 is a cross-sectional view showing a transmission oil cooler for an automobile according to an embodiment, FIG. 6 is a perspective view showing a tube according to an embodiment of the present invention, FIG. 7 is a plan view showing a plate according to an embodiment of the present invention, and FIG. 8 is 9 is a side view showing a plate according to an embodiment of the present invention, Figure 9 is a cross-sectional view showing a tube according to an embodiment of the present invention.

As shown in FIG. 3, the transmission oil cooler 40 for a vehicle of the present invention includes a tube part 10 and a fitting part 20.

The tube portion 10 flows through the inside of the tube portion 10 to allow heat to flow through the inside of the working fluid, and then flows out again to the outside. Referring to FIG. 6, a plurality of plates 12, 12 ′) are coupled to each other to form a pair of tubes 11, and the plurality of tubes 11 are stacked to form a tube portion 10. (The working fluids described below refer to general automotive transmission oils.)

As shown in FIGS. 6 and 7, the plates 12 and 12 'are provided at both ends thereof with an inlet 13 and an outlet 14 so that a working fluid flowing in the tube 10 is introduced / outflowed at both ends. ) Are formed, and the inlet 13 and the outlet 14 are formed at the same position on the plurality of plates 12 and 12 ', and at the bottom of the stacked plates 12 and 12'. The inlet / outlet 13 and 14 is not formed in the plate 12 'to be installed. Therefore, the working fluid is introduced through the inlet 13 formed at the top end and flows in the form of "형태" to flow out through the outlet 14 formed at the top end.

In addition, a plurality of rails 15 protruding to the outside in order to increase the heat exchange efficiency is formed on one end surface of the plate (12, 12 '). In this case, the rails 15 are spaced apart in the oblique direction in the plane of the plate (12, 12 ') is formed in a plurality of protruding, the plurality of rails 15 are formed at a predetermined interval or mutually without a predetermined interval. Can be.

In addition, the plates 12 and 12 'are formed as one tube 11 by mutually contacting opposite sides on which the rails 15 are formed. That is, the upper plate 12 and the lower plate 12 ′ are coupled to each other by bonding the edges of the surface on which the rail 15 is not formed.

As shown in FIGS. 4 and 5, the flat part 16 is formed near the inlet 13 and the outlet 14 of the plates 12 and 12 ′, and the upper plate 12 and the lower plate 12 are formed. The flat portions 16 of ') are bonded by mutual bonding. In addition, the flange portion 17 may be formed for tighter coupling to the inlet / outlet openings 13 and 14 of the upper plate 12 and / or the lower plate 12 '.

3, 4, and 5, the fitting portion 20 is one end is in contact with the inlet / outlet port 13, 14 of the tube portion 10, the radiator tank (not shown) formed on the outside on the opposite side It is configured to include a screw portion 21 and the support portion 22 to be in communication with the tube portion 10.

Here, the screw portion 21 is protruded to the outside is formed with a screw thread on the outer circumferential surface and / or the inner circumferential surface to be coupled to the coupling member (not shown) for connecting to the radiator tank. In addition, the support 22 is formed integrally with the end of the screw portion 21 to support the end of the coupling member coupled to the screw thread, and than the outer peripheral surface of the screw 21 to be firmly coupled to the tube portion 10 Is formed larger.

Hereinafter, the numerical limitation of the transmission oil cooler 40 for automobiles described in the present invention will be described with reference to graphs and tables according to experimental data.

10 is a graph showing the oil outlet side temperature according to the ratio of the rail angle (θ) and the rail height (h) to the rail pitch (P) according to an embodiment of the present invention, Figure 11 is one of the present invention A graph showing oil pressure drop according to a ratio of a rail angle θ and a rail height h to a rail pitch P according to an embodiment, and FIG. 12 is an inner circumferential length of a rail according to an embodiment of the present invention. It is a graph showing the oil outlet side temperature according to the ratio of the inner cross-sectional area (A) of the rail to (L), Figure 13 is an inner cross-sectional area of the rail with respect to the inner circumferential length (L) of the rail according to an embodiment of the present invention A graph showing the oil pressure drop according to the ratio of (A).

As shown in FIGS. 10 and 11, the angle θ of the rail 15 is 55 to 65 degrees with respect to the width direction of the plate 12, and the "rail height h / h of the rail 15". When the rail pitch P "is 0.10 to 0.20, it can be seen that the heat exchange efficiency of the tube part 10 is high because the oil outlet side temperature and the oil pressure drop are low regardless of the flow rate of the oil. At this time, the oil outlet side temperature and the oil pressure drop according to the ratio (h) of the rail 15 and the height h of the rail 15 to the pitch P of the rail 15 are lower than It was tested by the test conditions and test equipment of 1, the optimum range according to the flow rate of the oil is shown in Table 2.

Oil Inlet Temperature 115 ± 0.5 ℃ Water inlet temperature 80 ± 0.5 ℃ Water flow 100 LPM Oil Flow Rates [Low flow rate] 3.5LPM [Medium flow rate] 8.0LPM [High flow rate] 12.0LPM ※ The flow rate in the unit plate is 1 / n Test equipment CFD S / W: Fluent V6.3

division Optimum range by oil flow rate Low flow rate Medium flow rate High flow θ h / P θ h / P θ h / P Oil outlet temperature 35-65 degrees 0.10 to 0.20 0.35 to 0.45 40 to 65 degrees 0.10-0.20 55-65 degrees 0.10-0.45 Oil pressure drop 55-65 degrees 0.10 to 0.20 0.30 to 0.40 50-65 degrees 0.10 to 0.20 0.35 to 0.45 35-65 degrees 0.10 to 0.20 0.35 to 0.45 Remarks ※ θ: angle of rail, h: height of rail, P: pitch of rail

In the present invention, the basis for limiting the ratio (h) of the rail 15 to the angle θ of the rail 15 and the pitch P of the rail 15 will be described. As mentioned in 11 and Table 2, the angle θ of the rail 15 ranges from 35 to 65 degrees and the height h of the rail 15 relative to the pitch P of the rail 15. Based on the test method of oil flow rate according to the test method of Table 1 in the range of 0.10 ~ 0.45, the angle (θ) of the rail 15 and the heat exchange efficiency that can achieve the optimum heat exchange efficiency at all oil flow rate It was found that the height h ratio of the rail 15 to the pitch P of the rail 15 was 55 to 65 degrees and 0.10 to 0.20, respectively.

As shown in Figs. 12 and 13, when the inner " cross section A / inner circumferential length L " of the rail 15 is 0.40 to 0.60 mm, the oil outlet temperature is independent of the oil flow rate. It can be seen that the heat exchange efficiency of the tube portion 10 is high because the oil pressure drop is low. At this time, the oil outlet side temperature and oil pressure drop according to the ratio of the inner cross-sectional area (A) of the rail 15 to the inner circumferential length (L) of the rail (15) by the test conditions and test equipment of Table 1 Tested, the optimum range according to the flow rate of the oil is shown in Table 3.

At this time, the inner cross-sectional area (A) and the inner circumferential length (L) of the rail 15 is as shown in Figure 9, the inner cross-sectional area (A) of the rail 15 is upper in one tube (11) Refers to the sum of the spaces through which the working fluid flows based on the cross section of the point at which the rails 12 formed in the plate 12 and the lower plate 12 'intersect, and the inner circumferential length L of the rail 15 Denotes the sum of the inner circumferential lengths of the inner cross-sectional areas A of the rail 15.

That is, it means the sum of the total internal cross-sectional area A and the total internal circumferential length L in the whole cross section of the point where the rail 15 intersects in one tube 11.

division Optimum range by oil flow rate Low flow rate Medium flow rate High flow Oil outlet temperature 0.40-0.65 0.40-0.65 0.35-0.60 Oil pressure drop 0.40-0.60 0.40-0.60 0.40-0.60 Remarks ※ A: Inner section of rail, L: Inner circumference of rail

Referring to the reason for limiting the ratio of the inner cross-sectional area (A) of the rail 15 to the inner circumferential length (L) of the rail 15 in the present invention, as described in Figure 12 and 13 and Table 3 Similarly, the ratio of the inner cross-sectional area A of the rail 15 to the inner circumferential length L of the rail 15 is determined according to the oil flow rate according to the test method of Table 1 in the range of 0.30 to 0.60 mm. As a result of the comparative test, it can be seen that the ratio of the inner cross-sectional area A of the rail 15 to the inner circumferential length L of the rail 15, which can achieve the optimum heat exchange efficiency at all oil flow rates, is 0.40 to 0.60 mm. And limited it.

In addition, the design values for the tube portion 10, the plates 12, 12 'and the working fluid of the present invention will be described.

The stacking height (TSH) of the tube portion 10 is 10 ~ 50mm (height in which a plurality of tubes are stacked), the width of the plates (12, 12 ') is 25 ~ 50mm, the plates (12, 12') ) Is 0.2 to 0.5 mm thick.

In addition, the flow rate of the working fluid flowing in the tube 11 is made of 2 ~ 12LPM.

The stacking height (TSH) of the tube portion 10 is preferably formed in 10 ~ 50mm in consideration of the heat exchange performance side and the width of the plate (12, 12 '), the stacking height of the tube portion 10 If the TSH is less than 10 mm, the height of the tube portion 10 is too low, the number of plates 12 and 12 'to be stacked is so small that the heat exchange performance is deteriorated, and the stacking height TSH exceeds 50 mm. In addition, since the height of the tube portion 10 is too high, assembly is poor, and mounting and installation of the transmission oil cooler are difficult, the plates 12 and 12 'of the present invention are formed to have a thickness of 10 to 50 mm.

In addition, the widths of the plates 12 and 12 'are preferably formed in a range of 25 to 50 mm. When the widths of the plates 12 and 12' are less than 25 mm, the contact area with the cooling water is so small that heat exchange performance is reduced. When the width of the plates 12 and 12 'exceeds 50 mm, the width of the tube part 10 is too wide, which makes it difficult to install and install the transmission oil cooler. , 12 ') has a width of 25 to 50 mm.

In addition, the thickness of the plates 12 and 12 'is preferably formed to be 0.2 ~ 0.5mm, and if the thickness of the plates 12 and 12' is less than 0.2mm, the inside of the plates 12 and 12 ' It is difficult to withstand the working pressure of the flowing working fluid, and if the thickness of the plates (12, 12 ') exceeds 0.5mm, there is a problem that it is difficult to increase the material cost due to excessive thickness and to secure the appropriate tube portion 10 thickness The plate 12, 12 'of the present invention is formed to a thickness of 0.2 ~ 0.5mm.

1 is a perspective view showing a transmission oil cooler for a conventional vehicle,

Figure 2 is a side view showing a transmission oil cooler for a conventional vehicle,

Figure 3 is a perspective view of a transmission oil cooler for a vehicle according to an embodiment of the present invention,

Figure 4 is a cross-sectional view showing a transmission oil cooler for a vehicle according to an embodiment of the present invention,

5 is a cross-sectional view showing a transmission oil cooler for a vehicle according to another embodiment of the present invention;

6 is a perspective view showing a tube according to an embodiment of the present invention,

7 is a plan view showing a plate according to an embodiment of the present invention,

8 is a side view showing a plate according to an embodiment of the present invention,

9 is a cross-sectional view showing a tube according to an embodiment of the present invention,

10 is a graph showing an oil outlet side temperature according to a ratio of a rail angle θ and a rail height h to a rail pitch P according to an embodiment of the present invention.

11 is a graph showing the oil pressure drop according to the ratio of the rail angle (θ) and the rail height (h) to the rail pitch (P) according to an embodiment of the present invention,

12 is a graph showing the oil outlet side temperature according to the ratio of the inner cross-sectional area A of the rail to the inner circumferential length L of the rail according to the embodiment of the present invention,

Figure 13 is a graph showing the oil pressure drop according to the ratio of the inner cross-sectional area (A) of the rail to the inner circumferential length (L) of the rail according to an embodiment of the present invention.

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

10 tube portion 11: tube

12, 12 ': plate 13: inlet

14 outlet 15 rail

16: flat part 17: flange part

20: fitting portion 21: screw portion

22: support portion 40: transmission oil cooler

Claims (7)

Tube part 10 having inlet 13 and outlet 14 formed at both ends thereof so that the working fluid flows therein, and inlet / outlet 13, 14 of the tube part 10 are formed at one end thereof. In the automotive transmission oil cooler 40 comprising a fitting portion 20 connected to the radiator tank and in communication with the tube portion 10, The tube portion 10 is a plurality of plates (12, 12 ') are formed by coupling each other two by one tube 11, the plurality of tubes 11 are formed by mutually stacked, One end surface of the plate 12, 12 'is formed with a plurality of protruding rails 15 to increase heat exchange efficiency, the inlet port (2, 12') at both ends of the working fluid flows in / out ( 13) and the transmission oil cooler for cars, characterized in that the outlet 14 is formed respectively. The method of claim 1, The rail (15) is a transmission oil cooler for automobiles, characterized in that the plurality of protrusions spaced apart in the oblique direction in the plane of the plate (12, 12 '). The method of claim 2, The angle (θ) of the rail 15 is a transmission oil cooler for a vehicle, characterized in that 55 to 65 degrees based on the width direction of the plate (12, 12 '). The method of claim 3, wherein Transmission oil cooler for automobile, characterized in that the height (h) ratio of the rail (15) to the pitch (P) of the rail (15) is 0.10 ~ 0.20. The method of claim 2, Transmission oil cooler for automobile, characterized in that the ratio of the inner cross-sectional area (A) of the rail (15) to the inner circumferential length (L) of the rail (15) is 0.40 ~ 0.60mm. The method of claim 1, wherein the fitting portion 20, A threaded portion 21 which protrudes outward and has threads formed on an outer circumferential surface and / or an inner circumferential surface such that a coupling member connecting to the radiator tank is coupled; A support part 22 formed integrally with the end of the screw part 21 and coupled to the tube part 10; Transmission oil cooler for cars comprising a. The method of claim 1, The tube part 10 has a stacking height (TSH) of 10 to 50mm, the plates 12 and 12 'have a width of 25 to 50mm and a thickness of 0.2 to 0.5mm. .

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