KR101273440B1 - Heat Exchanger - Google Patents

Abstract

The present invention relates to a heat exchanger, and an object of the present invention, in particular, in a heterogeneous heat exchanger that is used as a warmer or cooler for exchanging cooling water and oil in separate tightly coupled flow spaces to exchange heat with each other, By optimizing the shape and arrangement of the heat exchanger to maximize the heat exchange performance.
In the heat exchanger of the present invention, a plurality of plates 500 are stacked to alternately form a first medium space 100 through which a first heat exchange medium flows and a second medium space 200 through which a second heat exchange medium flows. The plate 500 includes a first medium inlet 121 and a first medium outlet 122 formed in a through shape to allow the first heat exchange medium to flow in and out of the first medium space 100, respectively; A first medium tank 110 configured to recess or protrude a region near the first medium inlet 121 and the first medium outlet 122 to accommodate and flow the first heat exchange medium; A second medium inlet 221 and a second medium outlet 222 for introducing and discharging a second heat exchange medium into the second medium space 200, respectively; And a second medium tank 210 configured to receive or flow a second heat exchange medium by forming a recessed or protruding region near the second medium inlet 221 and the second medium outlet 222. In the heterogeneous heat exchanger 1000 in which the plate-shaped fin 300 is inserted into the first medium space 100 and the second medium space 200, the plate 500 may include the first medium inlet ( 121 and the first medium outlet 122 are disposed to face in a diagonal direction of the plate 500, respectively, and the second medium inlet 221 and the second medium outlet 222 are each the plate 500. The pin 300 is disposed to face each other in the diagonal direction, the flow resistance in one direction is greater than the flow resistance in the other direction, the direction of one edge of the plate 500 is called the first direction, When the direction of the other corner perpendicular to this is called the second direction, the first The direction according to the flow resistance of the fin 300 disposed in the body space 100 and the direction according to the flow resistance of the fin 300 disposed in the second medium space 100 are arranged to be perpendicular to each other. It features.

Description

Heat Exchanger {Heat Exchanger}

The present invention relates to a heat exchanger.

In general, a vehicle is provided with a cooling system in the form of a heat exchanger such as a radiator or an oil cooler as well as an air conditioning system for indoor cooling.

The radiator is configured to prevent the temperature of the engine from rising above a certain temperature. The radiator has a high temperature cooling water that absorbs heat generated by combustion while circulating inside the engine and is circulated by a water pump to pass through the radiator. It is a heat exchanger that releases heat to prevent overheating of the engine and maintains an optimal operating condition.

In addition, oil is filled in parts such as an engine or a transmission of an automobile in order to lubricate and maintain airtightness. When the oil becomes too hot, the viscosity of the oil becomes low and the desired function (i.e., lubrication and air tightness) Particularly, since the lubrication is not performed well, the parts such as the engine may be damaged. In order to prevent such a phenomenon, the means for cooling the oil is an oil cooler.

Since a lot of heat is generated in the engine while driving, the coolant and the oil become hot, and the cooling is performed by the radiator and the oil cooler, respectively. On the other hand, in the case of oil has a property that the viscosity is increased when the temperature is lowered, when the ambient temperature is very low, such as a large fat, winter, etc., the viscosity of the oil in the initial stage is higher than necessary. However, if it is further cooled using an oil cooler, there is a risk of causing damage to components such as the engine. Such a phenomenon is called a low temperature shock, and in order to prevent such a low temperature shock, a solution such as heating the oil by using a warmer, which is a kind of heat exchanger, is used in the initial stage of startup.

Thus, among the heat exchangers used as oil coolers or warmers, there is a heterogeneous heat exchanger in which the coolant and the oil are circulated in the flow spaces which are separated from each other but are in close contact with each other so that heat exchange between the coolant and the oil occurs. This heterogeneous heat exchanger, as described above, causes heat exchange between the coolant and the oil, but when the oil is too low, the oil is heated by the relatively hot coolant to serve as a warmer. The oil is cooled by the phosphorus coolant to act as a cooler.

One embodiment of such a heterogeneous heat exchanger is shown in FIG. 1. As shown in the figure, two different heat exchange media (2, as described above, a coolant and oil in the case of a warmer or cooler) are circulated, and each of them is referred to as a first heat exchange medium and a second heat exchange medium. As shown in FIG. 1, the heterogeneous heat exchanger includes a first heat exchange medium introduced into the first medium inlet 2 through a first medium flow space between the pair of plates 1. 3) the second heat exchange medium introduced into the second medium inlet 4 is discharged to the second medium outlet 5 via the second medium flow space between the pair of plates (1). . Here, the first heat exchange medium and the second heat exchange medium (for example, cooling water and oil) flow into the first medium flow space and the second medium flow space, respectively, and the first medium flow space and the second medium flow space are mutually different. In close contact, heat exchange occurs between the first heat exchange medium and the second heat exchange medium flowing in each space.

FIG. 1 illustrates a heterogeneous heat exchanger in which beads are formed in a first medium flow space and a second medium flow space, and separate fins are provided in the first medium flow space and the second medium flow space so that heat exchange occurs more easily. This may be inserted. However, when the fin is inserted, the heat exchange area is widened, and the heat exchange performance is improved, and at the same time, the resistance is generated in the flow by the fin, and the pressure drop is increased, thereby reducing the heat exchange performance. That is, the heat exchange performance may be increased depending on the shape or arrangement of the fins, but the heat exchange performance may be deteriorated if the shape or arrangement of the fins is incorrectly designed.

As such, the shape and arrangement design of the fins inserted into the heterogeneous heat exchanger is an important factor directly related to the performance of the heterogeneous heat exchanger.

Therefore, the present invention has been made to solve the problems of the prior art as described above, the object of the present invention, in particular, a warmer or cooler to heat exchange with each other by flowing the coolant and oil in isolated tightly coupled flow spaces, respectively. In the heterogeneous heat exchanger used, the shape and arrangement of the fins inserted into the heterogeneous heat exchanger are optimized to provide a heat exchanger in which heat exchange performance is maximized.

The heat exchanger of the present invention for achieving the above object, the first medium space 100 is a plurality of plates 500 are stacked to the first heat exchange medium flows the second medium space in which the second heat exchange medium flows The first medium inlet 121 and the first are formed in the through-hole formed in the plate 500 to the inlet and outlet of the first heat exchange medium to the first medium space 100, respectively. A media outlet 122; A first medium tank 110 configured to recess or protrude a region near the first medium inlet 121 and the first medium outlet 122 to accommodate and flow the first heat exchange medium; A second medium inlet 221 and a second medium outlet 222 for introducing and discharging a second heat exchange medium into the second medium space 200, respectively; And a second medium tank 210 configured to receive or flow a second heat exchange medium by forming a recessed or protruding region near the second medium inlet 221 and the second medium outlet 222. In the heterogeneous heat exchanger 1000 in which the plate-shaped fin 300 is inserted into the first medium space 100 and the second medium space 200, the plate 500 may include the first medium inlet ( 121 and the first medium outlet 122 are disposed to face in a diagonal direction of the plate 500, respectively, and the second medium inlet 221 and the second medium outlet 222 are each the plate 500. The pin 300 is disposed to face each other in the diagonal direction, the flow resistance in one direction is greater than the flow resistance in the other direction, the direction of one edge of the plate 500 is called a first direction, When the direction of the other corner perpendicular to this is called the second direction, the first The direction according to the flow resistance of the fin 300 disposed in the body space 100 and the direction according to the flow resistance of the fin 300 disposed in the second medium space 100 are arranged to be perpendicular to each other. It features.

At this time, the first heat exchange medium and the second heat exchange medium is characterized in that the cooling water and oil, respectively. In this case, the fin 300 is preferably arranged such that the oil flows in the direction in which the flow resistance is larger, and the coolant flows in the direction in which the flow resistance is smaller.

In addition, the heat exchanger 1000 is characterized in that the first heat exchange medium and the second heat exchange medium is formed to form a counter flow.

In addition, the pin 300 is preferably formed in a square shape. In addition, the plate 500 is preferably formed in a square shape.

According to the present invention, in a heterogeneous heat exchanger in which heat exchange between heterogeneous fluids occurs by distributing heterogeneous fluids to separate flow spaces which are separated from each other, the pressure drop of the heat exchange medium during the flow can be lowered than in the prior art. By adjusting the shape and arrangement of the fins so as to optimize the shape and arrangement of the fins inserted into the heterogeneous heat exchanger, there is a great effect of maximizing the heat exchange performance. In addition, through the improvement of the shape of the plate and the pin (square shape) it is also possible to obtain the effect of further reducing the number of parts.

In addition, by employing the heat exchanger of the present invention as a water-cooled oil cooler or warmer of the vehicle, there is also an effect that can improve the performance of the vehicle cooling system.

1 is a typical heterogeneous heat exchanger.
2 is a perspective view of a heat exchanger of the present invention.
3 is a side cross-sectional view of a heat exchanger of the present invention.
4 is a perspective view of a pin.
5 is a layout comparison of the fins of the prior art and the present invention.
6 is a heat exchange performance graph according to the fin arrangement.
7 is a flow resistance graph according to the pin arrangement.
8 is another embodiment of a plate and pin of the present invention.

Hereinafter, a heat exchanger according to the present invention having the configuration as described above will be described in detail with reference to the accompanying drawings.

Figure 2 is a perspective view of the heat exchanger of the present invention, Figure 3 is a side cross-sectional view of the heat exchanger of the present invention, a cross-sectional view taken along the line AA 'of FIG. As shown in the drawing, the heat exchanger 1000 of the present invention includes a plurality of plates 500 in which a first medium space 100 through which a first heat exchange medium flows and a second medium space through which a second heat exchange medium flows. The first medium inlet 121 and the first are formed in the through-hole formed in the plate 500 to the inlet and outlet of the first heat exchange medium to the first medium space 100, respectively. A media outlet 122; A first medium tank 110 configured to recess or protrude a region near the first medium inlet 121 and the first medium outlet 122 to accommodate and flow the first heat exchange medium; A second medium inlet 221 and a second medium outlet 222 for introducing and discharging a second heat exchange medium into the second medium space 200, respectively; The second medium inlet 221 and the area adjacent to the second medium outlet 222 is formed in a recessed or protruding form, the second medium tank 210 for receiving and flowing the second heat exchange medium; heterogeneous provided Heat exchanger 1000. At this time, in the heat exchanger 1000 of the present invention, the plate-shaped fin 300 is inserted into the first medium space 100 and the second medium space 200. In the perspective view of FIG. 2, the pin 300 is omitted for ease of understanding, but as shown in the side cross-sectional view of FIG. 3, the pins are respectively provided in the first and second media spaces 100 and 200, respectively. 300 is to be inserted.

As such, when the heat exchanger 1000 is formed, the first heat exchange medium and the second heat exchange medium may be oil and cooling water, respectively. 2 and 3, the first heat exchange medium is oil, and the second heat exchange medium is cooled water. As such, when the first heat exchange medium and the second heat exchange medium are oil and cooling water, respectively, the heat exchanger 1000 may operate as a warmer or a cooler. That is, heat exchange between the coolant and the oil is performed in the heat exchanger 1000. More specifically, when the vehicle is running, relatively high temperature oil may be cooled by passing heat to the coolant to serve as an oil cooler. Alternatively, during winter or initial start-up of the vehicle, the temperature rises faster by passing through the engine, whereby the oil is heated by passing heat to the oil in which the relatively hot coolant is at a very low temperature. The machine 1000 is to operate as a warmer to prevent the cold impact phenomenon.

In addition, the plate 500, the first medium inlet 121 and the first medium outlet 122 are respectively disposed to face in a diagonal direction of the plate 500, the second medium inlet 221 And the second medium outlet 222 are disposed to face each other in the diagonal direction of the plate 500. In addition, the heat exchanger 1000 is preferably formed such that the first heat exchange medium and the second heat exchange medium have an opposite flow. As such, the heat exchange performance between the first heat exchange medium and the second heat exchange medium may be further improved.

4 is a perspective view of the fin, as shown in the fin 300 is formed so that the flow resistance in one direction is greater than the flow resistance in the other direction. In more detail, the flow resistance in the direction in which the faces are visible (here, this direction becomes one direction) is greater than the flow resistance in the direction in which the surfaces are not visible (here this direction is the other direction). . Therefore, a flow flowing in a direction parallel to or similar to one side is subject to more flow resistance than a flow flowing in a direction parallel to or similar to the other direction.

In this case, in the heat exchanger 1000 of the present invention, when the direction of one edge of the plate 500 is called a first direction, and the direction of the other edge perpendicular to this is called a second direction, the first medium space Characterized in that the direction according to the flow resistance of the pin 300 disposed in the (100) and the direction according to the flow resistance of the pin 300 disposed in the second medium space 100 is perpendicular to each other. do.

More specifically, it is as follows. Fig. 5 shows the arrangement of the pins of the prior art and the present invention. Fig. 5 (A) shows the conventional pin arrangement and Fig. 5 (B) shows the arrangement of the pin of the present invention. As shown in FIG. 5 (A), the oil flow direction and the coolant flow direction are conventionally arranged in the same direction as the flow resistance of the fin 300. However, in the present invention, as shown in Figure 5 (B), the oil flow direction is arranged in parallel with one side direction (see Fig. 4) of the direction according to the flow resistance of the fin 300, the cooling water flow direction is The pin 300 is arranged to be parallel to the other direction (see FIG. 4) among the directions according to the flow resistance of the pin 300. In other words, if the pin 300 is arranged in any direction in the first medium space 100, the pin 300 is rotated 90 ° in the second medium space 200.

In the heat exchanger 10000 of the present invention, as in the example of FIG. 5, the fin 300 has an oil flow in a direction in which the flow resistance is larger (ie, in one direction), and the flow resistance is smaller in the fin 300. It is most preferable to arrange the cooling water in a direction (i.e., the other direction here), which will be described in more detail below.

6 is a heat exchange performance graph according to the fin arrangement, Figure 7 is a flow resistance graph according to the fin arrangement, Figure 7 (A) is a graph for water, that is, coolant, Figure 7 (B) is a graph for oil, respectively It is shown.

At this time, when oil or coolant flows in parallel with the side where the flow resistance of the fin 300 is smaller (ie, the other direction), the direction of oil or coolant is 0 °, and the oil or coolant flows through the fin 300. When the resistance flows in parallel with one side (ie one direction), the direction of oil or coolant is 90 °. Applicants of the present invention, experiments on the heat exchange performance and flow resistance for four cases where the coolant / oil direction is 90 ° / 90 °, 0 ° / 90 °, 90 ° / 0 °, 0 ° / 0 ° respectively And the results are the graphs of FIGS. 6 and 7.

As shown in Figure 6, the heat exchange performance is excellent when the coolant / oil direction is 90 ° / 90 °, 0 ° / 90 °. In this case, as shown in FIG. 7, when comparing 90 ° / 90 ° and 0 ° / 90 °, the flow resistance is lower when the coolant / oil direction is 0 ° / 90 °. Can be. That is, in the heat exchanger 1000 of the present invention, when the coolant / oil direction is 0 ° / 90 °, that is, the coolant flows in the other direction, and the oil is disposed in the fin 300 so as to flow in one direction. It can be seen that it is an optimum arrangement that maximizes heat exchange performance while minimizing resistance.

In addition, in the present invention, the pin 300 and the plate 500 may be formed in a square shape to minimize the number of parts. 8 illustrates another embodiment of the plate and pin of the present invention. In the embodiment of FIG. 8A, as shown in FIGS. 2 and 3, the plate 500 is formed in a rectangular shape, but the pin 300 is formed in a square shape. 8B illustrates a case in which the plate 500 is formed in a square shape in addition to the pin 300. In the case of FIG. 8B, the pin 300 may be formed to have almost the same area as the plate 500, as in the left side of FIG. 8B, or on the right side of FIG. 8B. As described above, the plate 500 may be formed to have an area sufficient to be disposed inside the heat exchange medium outlet inlet portion.

As described above, when the fin 300 or the fin 300 and the plate 500 are formed in a square shape, the fin 300 or the fin 300 and the plate 500 are disposed in the first medium space 100 and the second medium space in assembling the heat exchanger 1000. There is no need to change the shape of the pin 300 to be different from each other, it is possible to use only the same parts to be assembled by only changing the direction. By doing so, there is a great advantage that only the change of the process can reduce the number of parts further than the conventional.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. It goes without saying that various modifications can be made.

1000: heat exchanger (of the invention)
100: the first medium space 110: the first medium tank
121: first medium inlet 122: first medium outlet
200: second medium space 210: second medium tank portion
221: second media inlet 222: second media outlet
300: pin 500: plate

Claims (6)

A plurality of plates 500 are stacked to alternately form a first medium space 100 through which the first heat exchange medium flows and a second medium space 200 through which the second heat exchange medium flows, and the plate 500 A first medium inlet 121 and a first medium outlet 122 formed in a through shape to allow the first heat exchange medium to flow in and out of the first medium space 100; A first medium tank 110 configured to recess or protrude a region near the first medium inlet 121 and the first medium outlet 122 to accommodate and flow the first heat exchange medium; A second medium inlet 221 and a second medium outlet 222 for introducing and discharging a second heat exchange medium into the second medium space 200, respectively; And a second medium tank 210 configured to receive or flow a second heat exchange medium by forming a recessed or protruding region near the second medium inlet 221 and the second medium outlet 222. In the heterogeneous heat exchanger 1000 in which the plate fin 300 is interposed between the first medium space 100 and the second medium space 200,
The plate 500, the first medium inlet 121 and the first medium outlet 122 are disposed to face in a diagonal direction of the plate 500, respectively, and the second medium inlet 221 and The second medium outlet 222 is disposed to face each other in the diagonal direction of the plate 500,
The pin 300 is in the form of an offset pin in which the centers of the mountains M and the centers of the mountains M adjacent to each other are spaced apart from each other to form a slit S for fluid flow.
The direction according to the flow resistance of the fin 300 disposed in the first medium space 100 and the direction of the flow resistance of the fin 300 disposed in the second medium space 200 are perpendicular to each other. Will be placed,
The pin 300 or the pin 300 and the plate 500 is formed in a square shape,
The first heat exchange medium and the second heat exchange medium are cooling water and oil, respectively.
The fin (300), the heat exchanger, characterized in that the oil flows in the direction in which the flow resistance is larger, the coolant flows in the direction in which the flow resistance is smaller.
delete delete The method of claim 1, wherein the heat exchanger 1000
And the first heat exchange medium and the second heat exchange medium to form a counter flow.
delete delete

Images