KR20010001624U - Heat transfer plate and oil cooler having the plate - Google Patents

Abstract

The present invention is an oil cooling device (Oil Cooler) having a heat transfer plate (그) and the heat transfer plate to increase the heat exchange rate between the wall surface and the fluid by expanding the heat transfer area of the wall surface heat exchanged with the fluid in the heat exchanger ).

Heat transfer plate according to the present invention is to increase the heat exchange rate between the heat transfer surface and the flow fluid by expanding the surface area of the heat transfer surface heat exchanged with the fluid, a plurality of waveforms of the same pitch (p) having a unit length in the fluid flow direction In the corrugated heat transfer plate 10, in which the heat rays 11 are formed to be arranged in a lattice form, the heat rays 11 are alternately arranged along the direction of the fluid flow, respectively, on the line and the rear thereof, and the other heat rays closest to each other. It characterized in that it has an induction part 12 inclined in the direction (11) to guide the fluid flow in the direction of the other heat transfer 11, this heat transfer plate 10 is applied to the oil cooling device The heat exchange between the oil and the heat exchange wall is active by increasing the contact ratio of the oil to the side wall of the heat transfer blade 11 and providing the oil flow with lateral fluidity to reduce the lateral temperature deviation of the oil. The oil cooling performance can be dramatically improved.

Description

Heat-transfer plate and oil-cooling device with heat transfer plate {HEAT TRANSFER PLATE AND OIL COOLER HAVING THE PLATE}

The present invention is an oil cooler equipped with a heat transfer plate and the heat transfer plate to increase the heat exchange rate between the wall and the flow fluid by extending the heat transfer area of the wall surface heat exchanged with the fluid in the heat exchanger ), More specifically, an oil cooling with heat transfer plate and its heat transfer plate having a higher heat exchange rate by allowing a flow fluid (for example, oil of an oil cooling device) to flow along diagonally spaced offset fins. Relates to a device.

Heat exchangers, such as automobile heat exchangers or oil coolers that have a wall surface that exchanges heat with a fluid that flows, usually have a heat transfer plate that increases the heat transfer area of the fluid on the wall surface where heat exchange occurs and increases the heat exchange rate therebetween. Is installed.

Since the heat transfer plate has a high thermal conductivity and a specific surface area, the heat exchange rate increases, so that most heat transfer plates are made of a metal material having a high heat conductivity and easy to mold, such as aluminum, and do not resist fluid flow. It is manufactured in the form of thin plate with wave shape that can maximize the specific surface area. The fins of the corrugated wave form turbulent flow of the fluid to increase the contact ratio of the fluid to the heat transfer plate, thereby increasing heat exchange rate.

FIG. 1 of the accompanying drawings shows an oil cooling device of a radiator built-in vehicle as an example of a heat exchanger having such a heat transfer plate, and FIG. 2 is a cross-sectional view showing its internal structure.

Radiator built-in oil cooler (Oil Cooler) is a device for cooling the oil used in the mechanical friction portion of the power transmission element, such as auto transmission using the cooling water of the radiator, the device (5), as shown in FIG. Likewise, each of the upper and lower tanks 1 and 2 into which the coolant flows in and out, the cooling tubes 3 connecting between the tanks 1 and 2, and the cooling tubes 3 interposed therebetween. In the radiator consisting of a heat radiating fin (4) or the like, it is embedded in the lower tank (2) in which the cooling water cooled while flowing down from the upper tank (1) along the cooling tubes (3).

This oil cooling device, as shown in Figure 2, the inner and outer tube 51, 52 to form an oil circulation path 500 through which oil is circulated in the cooling water circulation path 200 of the lower tank (2), The outer diameter pipe 52 is connected to both ends of each of the inlet pipe 53 and the inlet pipe 53 and the discharge pipe is composed of a bar, in particular, the heat transfer plate 10, as shown in the cross-sectional view of FIG. Likewise, interposed between the inner and outer diameter pipes 51 and 52 serves to increase the heat exchange rate between the oil and the cooling water. That is, the heat transfer plate 10 absorbs heat from the oil flowing along the oil circulation path 500 while being in contact with the inner and outer diameter tubes 51 and 52 and conducts the inner and outer tubes 51 and 52 to each other. By increasing the heat exchange rate between the oil flowing in the oil circulation path 500 and the cooling water flowing to the cooling water circulation path 200 outside thereof.

Such heat transfer plate, as described in the introduction, preferably has a large non-surface large shape so as to absorb more heat from the oil without disturbing the flow of the oil, and the material has a thermal conductivity as mentioned above. It is good that it is a high metal material which is easy to shape | mold.

Thus, conventionally, a thin film-shaped heat exchanger plate made of aluminum having a plurality of barbs on its oblique surface has been used, and as a more preferable shape, as shown in FIG. 3, the waveform is along the oil flow direction. A plurality of offset fins 11, which are divided at equal intervals and cross-arranged, have been used in which the heat transfer plates 10 alternately arranged in the oil flow direction.

In the conventional heat transfer plate 10 of FIG. 3, as shown in FIG. 4, the heat transfer blades 11 having the same pitch P when viewed in a planar cross-section have a cross direction with the transverse phase difference δ in the oil flow direction. By more densely arranged with respect to the oil flow cross-sectional area, the contact ratio of the oil to the heat transfer plate 10 is increased, and at the same time, the oil flow is turbulent by the tip of each heat transfer blade 10. Therefore, the heat transfer plate 10 is in contact with the heat transfer plate 11 in a larger proportion of the flowing oil is increased heat exchange rate between the oil and the heat transfer plate 10, resulting in a higher heat exchange rate between the oil and the cooling water oil It is possible to improve the cooling performance of the oil in the chiller.

However, the conventional heat transfer plate 10 as described above has a limit in increasing the heat exchange rate because it does not impart fluidity in the transverse direction with respect to the flowing oil. That is, since the oil flows only in a substantially straight direction without transverse flow in the oil circulation path 500, the contact ratio of oil to the heat transfer 11 is not only lowered, but also the heat exchange in the transverse direction in the oil circulation path 500. Due to the large variation in the rate, the heat transfer efficiency is not good.

Accordingly, the present invention, the problems with the conventional heat transfer plate and the oil cooling device having the heat transfer plate as described above are eliminated, the flow fluid (for example oil of the oil cooling device) to flow along the heat spacing diagonally spaced The purpose of this invention is to provide a heat transfer plate capable of further increasing the heat exchange rate of the heat exchanger by reducing the cross-sectional heat exchange rate variation of the heat transfer plate by providing transverse fluidity to the fluid, and at the same time providing an oil cooling device having the heat transfer plate. do.

1 is a perspective view showing a radiator built-in oil cooling device.

Figure 2 is a cross-sectional view taken along the line II-II of Figure 1 showing the internal structure of the oil cooling device.

3 is a perspective view of a conventional heat transfer plate.

Figure 4 is a plan sectional view of Figure 3 showing the flow of the fluid by the conventional heat transfer plate.

5 is a perspective view of the heat transfer plate according to an embodiment of the present invention.

6 is a plan sectional view of FIG. 5 showing a flow of fluid in accordance with an embodiment of the present invention.

<Description of the code | symbol about the principal part of drawing>

10: heat plate 11: heat plate

12: induction part

The present invention devised for the purpose as described above, by increasing the surface area of the heat transfer surface to heat exchange with the fluid flow to increase the heat exchange rate between the heat transfer surface and the flow fluid, a plurality of the same pitch having a unit length in the fluid flow direction In the corrugated heat transfer plate 10, in which the corrugated heat waves 11 are formed to be arranged in a lattice form, the heat waves 11 are alternately arranged along the direction of the fluid flow, and are respectively adjacent to the front and rear ends thereof. It characterized in that it has an induction part 12 inclined in the direction of heat (11) to guide the flow fluid in the direction of the other heat (11).

In the heat transfer pipes 11, the heat transfer pipes 11 adjacent to each other in the fluid flow direction may be divided and formed in a continuous wave form in the fluid flow direction so that the peaks and valleys are connected to each other.

On the other hand, according to another feature of the present invention, the outer diameter pipe 51 is built in the longitudinal direction in the cooling water flow path of the cooling water flow line and the both ends of the oil inlet pipe 53 and the discharge pipe 54 and the outer diameter pipe An inner diameter pipe 51 accommodated in the 52 and forming an oil flow path between the outer wall and the inner wall of the outer diameter pipe; and the inner and outer pipes 51 and 52 embedded in the oil flow path to be in contact with the flow path. In the oil cooling device comprising a heat transfer plate 10 for conducting the heat of the flowing oil to the inner and outer tube 51, 52, the heat transfer plate 10 is the same pitch having a unit length in the oil flow direction A plurality of corrugated heat transfer plates 11 are arranged in a lattice shape, wherein the heat transfer lines 11 are alternately arranged along the oil flow direction, respectively, and adjacent to each other at the line and the rear end thereof. Inclined to) and its other heat (11) It characterized in that it has a guide portion 12 for guiding the oil to the effort.

In addition, the heat transfer blades 11 adjacent to the oil flow direction of the heat transfer blades 11 is characterized in that it is divided and formed in a continuous waveform in the oil flow direction so that the peaks and valleys are connected.

According to the heat transfer plate 10 of the present invention of the above configuration, the heat transfer fluid 11 is arranged in a zigzag shape in which the fluid flow (for example, oil) is provided with transverse fluidity by the induction part 12 of the heat transfer blades 11. Since the flow is in contact with the inclined plane of the sequential, the contact rate of the fluid flow to the heat transfer heat 11 is increased, the heat transfer heat 11 can absorb a greater amount of heat from the fluid flow. Therefore, when the heat transfer plate 10 is applied to the oil cooling device, the heat transfer plate 10 increases the heat exchange rate between the oil and the cooling water, and as a result, the heat exchange performance of the oil cooling device can be improved.

Hereinafter, the functions and operations of the above components will be described in more detail with reference to the preferred embodiments of the present invention presented by the accompanying drawings.

In describing the embodiments of the present invention, for the sake of clarity, only the improved parts which do not overlap with the prior art will be mainly described, and the same reference numerals are used for the same configurations as the prior art configurations described at the outset.

Figure 5 is a perspective view showing the structure of the heat transfer plate according to an embodiment of the present invention, Figure 6 is a cross-sectional view showing the flow of oil by the heat transfer plate.

The heat transfer plate according to an embodiment of the present invention is applied to an oil cooling device, and the heat transfer plate 10 is interposed between the inner and outer diameter pipes 51 and 52 of the oil cooling device of FIG. 2 as described above. It is a cylindrical thermal conductor metal plate that absorbs heat from the oil flowing along the oil circulation path 500 therebetween and conducts the heat to the inner and outer tubes 51 and 52.

This heat transfer plate 10 has a plurality of corrugated heat transfer blades 11 formed by sheet metal forming, as shown in FIG. 5, which have the same pitch p in the direction orthogonal to the oil flow direction. In the flow direction they are arranged staggered with each other. That is, the heat transfer plate 10 is formed with a plurality of identical pitch (p) waveforms arranged in a direction orthogonal to the oil flow direction, wherein each waveform is cut at equal intervals along its longitudinal direction (ie oil flow direction) After being divided, the divided portions are sheet metal-molded with alternating lateral phases along the oil flow direction, thereby forming a plurality of heat transfer blades 11 which are arranged alternately along the oil flow direction. In these heat transfer blades 11, the phase difference δ between two longitudinally adjacent heat transfer blades 11 is approximately 1/2 (δ = p / 2) of the heat transfer blade 11 pitch p. It is preferable. Then, the width (w) of the peaks and valleys of the heat transfer blades 11 is made relatively larger than the horizontal width λ of the oblique plane, so that the peaks and valleys of the heat transfer blades 11 are oil-flowing directions as shown. It is preferred to continue along.

In addition, the induction part 12 for guiding oil flow is formed at each of the front and rear ends of the heat transfer blades 11, which are cut off part of the front and rear ends of the heat transfer blades 11, and the cut portions are adjacent to other heat transfer blades. It is formed by bending in the (11) direction.

The induction portions 12 of each heat wave 11 are inclined in a direction toward the heat wave 11 adjacent to each other before and after, as shown in FIG. Impart directional fluidity. By the action of the induction part 12, most of the oil is drawn along the valleys of the connecting heat pipes 11, and draws an approximately S-shaped streamline along the side wall of each heat pipe 11 with inertia according to the transverse flow rate component. Naturally flowing while contacting, a portion flows in a straight direction through the induction portion of the front and rear heat transfer 11.

Therefore, the heat transfer 11 according to the present invention is the contact ratio of the oil to the heat transfer 11 side wall by allowing the S-shaped flow and the linear flow co-exist in the flow of the oil by the action of the leading portion 12, the front and rear ends. In addition, the lateral temperature deviation of the flowing oil can be reduced. These two actions of the induction part 12 attract the increase in the heat exchange rate between the oil and each heat transfer 11 and consequently activate the heat exchange between the oil and the cooling water by the heat transfer plate 10 as a whole. It will increase the cooling performance of the device.

In this way, the heat transfer plate 10 according to the present invention is the flow fluid (oil in one embodiment above) and the heat exchange wall surface (in the previous embodiment and the outer circumferential surface and the outer surface of the inner tube by the action of the induction portion of the heat transfer 11) Since the heat exchange rate between the landscape inner circumferential surface) can be greatly increased, the heat exchange performance of the heat exchanger (the oil cooling device of one embodiment above) can be greatly improved.

According to the heat transfer plate according to the present invention as described in detail above, the action of the induction portion of the heat transfer heat, that is, the action of increasing the contact ratio of the fluid flow to the heat transfer heat (11) side wall and imparting transverse fluidity to the fluid fluid The heat exchange between the fluid and the heat exchange wall surface is activated by the action of reducing the lateral temperature deviation, thereby greatly improving the heat exchange performance of the heat exchanger.

In particular, this heat transfer plate is more effective when the fluid is a liquid, so the effect is even greater when applied to the oil cooling system, which is a heat exchanger between the liquid and the liquid (oil and cooling water).

Claims (4)

In the corrugated heat transfer plate 10, the corrugated heat transfer plates 10 are formed to be arranged in a lattice form with the same pitch p having the unit length in the flow direction of the flow fluid to be heat exchanged. The heat transfer blades 11 are alternately arranged along the flow direction of the fluid, and each of the induction parts 12 inclined in the direction of the heat transfer blades 11 adjacent to the line and the rear end thereof to guide the flow fluid toward the adjacent heat transfer blades 11. Waveform heating plate having a). The method of claim 1, The heat transfer plate (11) adjacent in the fluid flow direction is divided in a waveform that is continuous in the fluid flow direction, the corrugated heat transfer plate, characterized in that the peaks and valleys are continuously formed. The outer diameter pipe 52 is installed in the longitudinal direction in the cooling water flow path of the cooling water flow line and is connected to the oil inlet pipe 53 and the discharge pipe 54 at both ends thereof, and is accommodated in the outer diameter pipe 52 so that the outer wall and the The inner diameter pipe 5 which forms an oil flow path between the inner wall 52 of the outer diameter pipe 52, and the inner and outer diameter pipes 51 and 52 built into the oil flow path so as to contact the inner flow of the oil flowing in the flow path. In the oil cooling device comprising a heat transfer plate 10 that conducts to the outer diameter pipes (51) (52), The heat transfer plate 10 is a cylindrical heat conduction plate in which a plurality of corrugated heat transfer blades 11 of the same pitch p having a unit length in the oil flow direction are arranged in a lattice shape, and the heat transfer blades 11 are in an oil flow direction. Arranged so as to cross each other along the oil cooling device, characterized in that each having an induction part 12 to incline in the direction of the heat transfer 11 adjacent to the line, the rear end to guide the oil toward the adjacent heat transfer 11 . The method of claim 3, wherein Oil of the heat transfer (11) of the heat transfer adjacent to the oil flow direction is divided, formed in a continuous waveform in the oil flow direction, the oil cooling device, characterized in that the ridges and valleys are continuous.