KR101151754B1 - Plate Type Heat Exchanger - Google Patents

Abstract

The present invention relates to a plate heat exchanger, and an object of the present invention is to provide a plate heat exchanger in which heterogeneous fluids alternately flow and heat exchange in each layer. It is to provide a plate heat exchanger to improve the pressure drop amount and heat exchange performance by making it uniform throughout.

In the plate heat exchanger of the present invention, a plurality of plates 500 are stacked to form a first medium space 100 in which a first heat exchange medium flows in a portion where the front surfaces (A surfaces) of the plates 500 are coupled to each other. And a second medium space 200 in which a second heat exchange medium flows in a portion facing the rear surfaces (B surfaces) of the plate 500, and the first medium space 100 is formed in 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, 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; 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; In the heat exchanger 1000, the plate 500 is characterized in that a plurality of V-shaped beads 510 are formed in the inner region.

At this time, the bead 510 is characterized in that the V-shaped vertex of the bead center line with respect to each plate 500 in a pair of the plate 500 coupled to face each other are spaced apart a predetermined interval.

Plate Heat Exchanger, Plate, V-Bead, Vertex, Inflection Point, Spacing

Description

Plate Heat Exchanger {Plate Type Heat Exchanger}

The present invention relates to a plate heat exchanger.

The heat exchanger generally includes a pair of header tanks through which the heat exchange medium is introduced and discharged, and a tube which connects the header tanks and distributes the heat exchange medium therein to perform heat exchange. At this time, the heat exchanger can be largely divided into two types, a fin-tube type heat exchanger formed by inserting a plurality of tubes into a tank, and a plate type heat exchanger in which a plurality of plates are stacked to form a tube part and a tank part ( Plate heat exchanger). Among them, plate heat exchangers are widely used because they are easier to assemble than fin-tube type heat exchangers, have good productivity due to the small number of required parts, and can reduce volume, which is advantageous for securing engine room space. In particular, the plate heat exchanger allows for a more complicated and diversified flow path design than the fin-tube type heat exchanger by changing the shape of the plate. Especially, in the case where two fluids such as a water-cooled oil cooler flow through each other and heat exchange with each other, the plate heat exchanger It is preferable to apply.

When the plate heat exchanger is applied to a water-cooled oil cooler, a layer in which the cooling water flows and a layer in which the oil flows are alternately stacked. At this time, of course, the flow path must be formed so that the cooling water and oil do not mix with each other, and above all, the flow path must be configured so that the flow of the cooling water and the oil flow in each layer is smooth and uniform. To this end, various structures for providing a rib or the like on the plate to control the flow of the fluid are disclosed.

Figure 1 shows a simplified structure of a general plate heat exchanger that can be applied as a water-cooled oil cooler. As described above, such a plate heat exchanger has two different heat exchange media (cooling water and oil in the case of a water-cooled oil cooler), and each is referred to as a first heat exchange medium and a second heat exchange medium. As shown in FIG. 1, the plate heat exchanger includes a first heat exchange medium introduced into a first medium inlet 2 through a first medium flow space between a 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). .

In the structure of the plate heat exchanger, in order for the first heat exchange medium and the second heat exchange medium to smoothly exchange heat, it is natural that the flow of the heat exchange medium must be smooth and uniform over the entire area. Also, it is well known that the better the occurrence of turbulent flow in a fluid flow, the higher the heat exchange performance. The heat exchanger is configured to properly generate turbulence in the medium flow space and to guide the flow of the heat exchange medium properly. Beads are generally formed on the plate.

2 shows an example of a conventional bead structure as a plate of a conventional plate heat exchanger. The plate heat exchanger illustrated in FIG. 2 is a technique disclosed in International Patent Publication No. 2000-046564 (“Autism Heat Exchanger”, hereinafter referred to in the prior art), and the plate heat exchanger according to the prior art has a diagonal bead as shown in FIG. 2. Plates having a bead are made by stacking. The plate of the prior art has a form in which the flow flowing by bypassing the outside is blocked by an L-shaped barrier as shown in FIG. 2 (B). In addition, the plate of the prior art is stacked in the direction facing the same surface (that is, A surface A, B surface B between each other), one plate of the type as shown in Figure 2 (A) Stacked in the direction, the fluids flowing in adjacent layers are different from each other.

More specifically, when the front and rear surfaces of the plate as shown in Fig. 2A are referred to as A side and B side, respectively, as shown in Fig. 2B, Fig. 3A faces A side. 3 (B) shows a form in which the B surfaces are coupled to face each other. In the leftmost state in FIG. 3, when folded about the center line indicated by the dotted line, the shape is the same as that of the rightmost side of FIG. 3. In the center of FIG. At this time, as shown in Fig. 3 (A) or 3 (B), when the A surface or the B surface is coupled to face to each other is coupled in a state rotated by 180 ° with each other. In FIG. 3, the portions in which the heat exchange medium is accommodated are respectively shown in colored form. For convenience of division, the portions in which the first heat exchange medium is accommodated are ⓐ-1 and ⓐ-2, and the portions in which the second heat exchange medium is accommodated are ⓑ-. 1 and ⓑ-2. 3 (A) and 3 (B) show the combined state on the right side, where the uncolored portions are the portions in which the plates are in contact with each other, and the colored portions at the rightmost portion of FIG. The first medium space is represented by -1 and ⓐ-2 parts, and the colored part at the rightmost side of FIG. 3B is the second medium space by ⓑ-1 and ⓑ-2 parts.

4 illustrates a state in which a plurality of such plates are stacked. The plate labeled [A face (180 ° rotation)] in FIGS. 3A and 4 is the same plate as the plate labeled B face in FIGS. 3B and 4. In addition, if the plate indicated by [B plane (rotation of 180 °)] in Figs. 3B and 4 is inverted, the same shape as the plate indicated by A plane in Figs. 3A and 4 will be obtained. Therefore, as shown in FIG. 4, when a plurality of plates are stacked, different heat exchange media always flow in adjacent media flow spaces.

However, the heat exchanger according to the prior art has the following problems. FIG. 5 illustrates Computational Fluid Dynamics (CFD) results of a heat exchanger according to the prior art, and FIG. 5 (A) shows a surface of a first medium fluid space formed by combining A surfaces facing each other. 5 (B) shows the CFD results in the second medium flow space formed by combining the B surfaces facing each other. By the way, in the heat exchanger according to the prior art as shown in Figure 5, by configuring the inner bead as a uniform diagonal bead, the distribution of the flow path from the inlet and outlet located on the side to the inner bead is poor. That is, the flow pull occurs to the side where the inlet and outlet is located, and the flow drop occurs toward the outer bead because the pressure drop of the inner flow path is larger than that of the outer bead. (In particular, the area where the flow tilt occurs is denoted by S in FIG. 5.) As such, the flow drop occurs, resulting in an uneven pressure drop, thus deteriorating heat exchange performance.

Accordingly, the present invention has been made to solve the problems of the prior art as described above, the object of the present invention, in the plate heat exchanger in which the different types of fluid flows alternately flow in each layer, the bead of the plate heat exchanger By improving the position and structure, it is to provide a plate heat exchanger that improves pressure drop and heat exchange performance by making flow distribution uniform over the entire area.

Plate heat exchanger of the present invention for achieving the above object, a plurality of plates 500 are stacked to the first heat exchange medium flows to the portion facing the front (A surface) of the plate 500 is coupled A first medium space 100 is formed, and a second medium space 200 in which a second heat exchange medium flows is formed in a portion where the rear surface (B surface) of the plate 500 is coupled to each other, and the plate 500 is formed. The first medium inlet 121 and the first medium outlet 122 formed in a through shape to inlet and discharge the first heat exchange medium into 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; 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; In the heat exchanger 1000, the plate 500 is characterized in that a plurality of V-shaped beads 510 are formed in the inner region. At this time, when the bead 510 is the center line of the bead 510 is a bead center line, it is preferable that the inflection point is formed so that the bead center line is gently connected at the V-shaped vertex position of the bead 510.

At this time, the bead 510 is characterized in that the V-shaped vertex of the bead center line with respect to each plate 500 in a pair of the plate 500 coupled to face each other are spaced apart a predetermined interval. In addition, the beads 510 may be disposed to be spaced apart from each other so that the V-shaped vertex portions of each plate 500 do not meet each other.

In addition, the plate 500 is formed in the line symmetrical shape of the bead 510 located in the center portion of the plate 500, the bead 510 is a line and a line symmetric center line between the V-shaped vertices of the bead 510 It is characterized in that it is formed to match. In this case, the plate 500 is disposed with the first medium inlet 121 and the first medium outlet 122 spaced a predetermined distance from one side about a line symmetric center line, and the second medium inlet in the other direction 221 and the second medium discharge port 222 are spaced apart a predetermined distance, the front (A surface) or the back (B surface) facing each other at the time of coupling, characterized in that arranged in a state rotated 180 ° .

According to the present invention, in a plate heat exchanger in which heterogeneous fluids heat exchange with each other, the flow is uniformly distributed over the entire area of the heat exchanger, thereby improving the pressure drop characteristic, and thus the heat exchange performance is greatly improved. There is. In particular, according to the present invention, since the central portions of the V-shaped beads stacked alternately with each other are spaced apart from each other, uniform distribution of flow is more effectively achieved.

In addition, according to the present invention, since the heat exchange performance of the heat exchanger of the same volume is improved as described above, there is an effect that can reduce the volume of the heat exchanger, thereby increasing the engine room space utilization. In addition, since the heat exchanger of the present invention only needs to stack the same shape plate back and forth, it is easy to assemble and has an effect of improving productivity.

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

6 is an exploded perspective view of the plate heat exchanger of the present invention. As shown, the basic shape of the plate heat exchanger 1000 of the present invention is a common plate heat exchanger, a plurality of plates 500 are stacked on the combined portion facing the front (A surface) of the plate 500 A second medium space 200 in which a first medium space 100 through which a first heat exchange medium flows is formed, and a second heat exchange medium flows in a coupled portion facing the rear surface (B surface) of the plate 500. Is formed. At this time, in the plate heat exchanger 1000 of the present invention, the plate 500 is formed with a plurality of V-shaped beads 510 in the inner region to promote heat exchange. When the plate heat exchanger is applied to a water-cooled oil cooler, the first heat exchange medium and the second heat exchange medium may be cooling water and oil. In FIG. 6, the first medium inlet 121 and the second medium inlet 221 are disposed at the left side (based on FIG. 6), and the first medium outlet 122 and the second medium outlet 222 are disposed at the right side. Although shown, it is not necessarily arranged as such, the inlet and outlet may be changed depending on the arrangement. For example, when viewed in a plan view small on the left side of FIG. 6, inlet and outlet ports are disposed in the same manner as in FIG. 6 in the case of the A side and the B side, but the A side rotated 180 ° and the B side rotated 180 °. Is the inlet and outlet are arranged as opposed to the A side and B side. In addition, in FIG. 6, both the first heat exchange medium and the second heat exchange medium are shown to flow in from the left side and discharge from the right side (based on FIG. 6). The location of the inlet and outlet may be determined appropriately according to the characteristics or operating conditions of the medium and the second heat exchange medium.

Figure 7 shows the plate of the plate heat exchanger of the present invention, through which the plate of the present invention will be described in more detail. As shown in FIG. 7, the plate 500 constituting the plate heat exchanger 1000 of the present invention has a through-hole shape so that the first heat exchange medium is introduced into and discharged from the first medium space 100, respectively. The first medium inlet 121 and the first medium outlet 122 that are formed, and the region near the first medium inlet 121 and the first medium outlet 122 are recessed or protruded to form first heat exchange. The first medium tank 110 for receiving and flowing the medium is provided. In addition, the plate 500 includes 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 the second medium inlet ( 221 and a region adjacent to the second medium outlet 222 is formed in a recessed or protruding shape, and includes a second medium tank 210 for accommodating and flowing the second heat exchange medium. In this case, the first medium space 100 and the second medium space 200 are formed as a plurality of the beads 510 formed in a V-shape in the inner region of the plate 500. FIG. 7 illustrates a shape seen from the front side of the plate 500 (the surface of which the inside is visible, hereinafter referred to as the A surface), and the portion indicated in dark color in FIG. 7 is a portion recessed than the peripheral portion. Therefore, when the plates 500 are combined, a space is formed in the recessed portion, and the heat exchange medium is received and distributed through the space. Of course, when viewed from the rear side of the plate 500 (the surface of which the outside is visible, hereinafter referred to as B surface), the portion recessed in the A surface protrudes from the B surface, and the portion protruding from the A surface is depressed in the B surface, and thus the heat exchange medium. Space is accommodated. The beads 510 and related structures will be described later in more detail.

As shown in FIG. 7, the plate 500 is also formed with an outer bead 520 formed along the outline at a position close to the outline of the plate 500. The outer bead 520 forms a flow path through which the first heat exchange medium can be bypassed and flows, and at the same time, serves as an outer wall when combining the B surfaces to face each other. That is, when the A faces are coupled to face each other (hereinafter referred to as AA coupling), the outer circumferential surfaces are in close contact with each other so that the recessed portion of the bead 510 may be sealed from the outside when viewed from the A side of the plate 500. . At this time, since the outer peripheral surfaces are not in contact with each other when the surfaces B to face each other (hereinafter referred to as BB coupling), the outer bead 520 is in close contact with each other when viewed from the B side of the plate 500 The recessed portion of the bead 510 is to be sealed from the outside.

Since the outer bead 520 and the first tank part 110 are directly connected, the outer bead around the first medium inlet 121 and the first medium outlet 122 in order to prevent flow tendency. An L-shaped barrier 530 is formed at the side of 520. At least one first flow path 541 is formed on the barrier 530 or via the second tank part 210 to prevent the flow of fluid to the outer bead 520 and improve flow distribution. At least one second flow path 542 is preferably formed.

8 and 9 will be briefly described for the lamination method of the plate of the present invention.

When the front and rear surfaces of the plate 500 as shown in FIG. 7 are referred to as A side and B side, respectively, as shown in FIG. 6, FIG. 8 (A) is a form in which A sides are faced to each other, and FIG. 8 ( B) shows a form in which the B faces are combined to face each other. In the leftmost state in FIG. 8, when the center line is folded around the center line shown in the dotted line, the shape is the same as that of the rightmost side of FIG. 8, and the center of FIG. At this time, as shown in Fig. 8 (A) or 8 (B) when the A surface or the B surface is coupled to face to each other is coupled in a state rotated by 180 ° with each other. That is, as shown in FIG. 7, the bead 510 positioned at the center portion of the plate 500 is linearly symmetrical, and the bead 510 is formed of the bead 510. The line connecting the V-shaped vertices and the line symmetric centerline are preferably formed to coincide. As described above, the plate 500 is formed in a substantially line symmetrical shape, and the first medium inlet 121 and the first medium outlet 122 are disposed at a predetermined distance from one side of the line symmetric center line, and the other side is disposed. When the second medium inlet 221 and the second medium outlet 222 are arranged to be spaced apart a predetermined distance, when the AA combination or BB combination when the front (A side) or the rear (B side) facing each other However, the first tank part 110 or the second tank part 210 are easily faced to each other by being disposed to be rotated 180 ° to each other.

In FIG. 8, the portions in which the heat exchange medium is accommodated are respectively shown in colored form. For convenience of division, the portions in which the first heat exchange medium is accommodated are ⓐ-1 and ⓐ-2, and the portions in which the second heat exchange medium is accommodated are ⓑ-. 1 and ⓑ-2. 8 (A) and 8 (B) are shown coupled to the uppermost side, the uncolored portion is the portion where the plates are in contact with each other, the colored portion of the right side of Figure 8 (A) is ⓐ The first medium space 100 is directly in the -1 and ⓐ-2 parts, and the rightmost colored part in FIG. 8B is the second medium space 200 in the ⓑ-1 and ⓑ-2 parts. .

9 shows a state where a plurality of such plates are stacked. The plate labeled [A side (rotation 180 °)] in FIGS. 8A and 9 is the same plate as the plate labeled B side in FIGS. 8B and 9. In addition, if the plate indicated by [B plane (rotation of 180 °)] in Figs. 8B and 9 is reversed, it becomes the same shape as the plate indicated by A plane in Figs. 8A and 9. Therefore, when a plurality of plates are stacked as shown in FIG. 9, different heat exchange media always flow in adjacent media flow spaces.

In the plate 500 of the present invention, the plurality of V-shaped beads 510 are disposed therein. At this time, when the V-shaped vertex portion passes, the direction of flow changes so that the V-shaped portion of the bead 510 is formed. It is necessary to optimize the design of the vertex parts. 10 illustrates the plate of the present invention in detail, and the bead 510 shape design of the present invention will be described in more detail with reference to FIG. 10.

In the plate 500 of the present invention, it is preferable that the direction of flow does not change rapidly at the V-shaped vertex portion of the bead 510, so that the center line of the bead 510 is referred to as a bead center line in actual production. At the V-shaped vertex position of the bead 510, the inflection point may be formed so that the bead center line is gently connected. In practice, since the inflection point is generated for convenience of production, the term 'vertex' in the following is referred to as including the case where the V-shaped vertex portion forms the inflection point.

At this time, the bead 510 in the plate 500 of the present invention, in the pair of the plate 500 coupled to face each other, the V-shaped vertex of the bead center line for each plate 500 is a predetermined interval By being spaced apart, the joined beads facing each other at the V-shaped vertex portion are less likely to overlap or most preferably have no overlap. That is, as shown in Figure 10, the bead 510 is arranged so as to be spaced apart from each other so that the V-shaped vertex portion for each plate 500 in the pair of the plate 500 coupled to face each other Most favorable to the flow distribution.

This will be described in more detail as follows. When the beads coupled to face each other at the V-shaped vertex portion of the bead 510 meet each other, there are the following problems. The size of the flow path space formed when the beads 510 meet each other at the V-shaped vertex portion of the bead 510 is greater than the size of the flow path space formed when the beads 510 meet each other. Therefore, adversely affects that the flow is uniformly distributed over the entire area of the plate 500.

In the present invention, as described above by designing the bead center lines of the beads 510 which are coupled to face each other as shown in FIG. 10 are spaced apart so as not to meet each other at the V-shaped vertex portion of the bead 510, The same negative effect is being eliminated. FIG. 11 illustrates the CFD analysis result of the plate heat exchanger of the present invention designed as described above, and the CFD analysis result of FIG. 11 (A) shows that each bead center line of the bead 510 has a V-shape of the bead 510. The vertex portions are arranged to meet each other, and the CFD analysis result of FIG. 11 (B) has a structure as shown in FIG. 10, and each bead center line of the bead 510 is a V-shaped vertex portion of the bead 510. This is the case where they are arranged not to meet each other. When comparing FIG. 11 (A) and FIG. 11 (B), in the case of FIG. 11 (B) to which the structure shown in FIG. 10 is applied, the distribution of flow is much more uniform than that of FIG. It can be seen that the improvement. As described above, in the plate heat exchanger of the present invention, at the V-shaped vertex portion of the bead 510, each bead center line of the bead 510 is disposed not to meet each other to form a separate flow path, thereby making The pressure drop can be improved. Accordingly, according to the plate heat exchanger of the present invention, the flow distribution in the entire area of the bead 510 inside the plate 500 is optimized, and ultimately, the plate heat exchange performance can be greatly improved.

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.

1 is a typical plate heat exchanger.

2 is a plate of a conventional plate heat exchanger.

3 and 4 is a plate lamination method of a conventional plate heat exchanger.

5 is a CFD result in a conventional plate heat exchanger.

6 is a plate heat exchanger of the present invention.

7 is a plate of the plate heat exchanger of the present invention.

8 and 9 are plate stacking method of the plate heat exchanger of the present invention.

10 is a detailed view of a plate of the present invention.

11 is a CFD result in the plate heat exchanger of the present invention.

DESCRIPTION OF REFERENCE NUMERALS

1000: plate heat exchanger (of the present 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

500: plate

510: Bead 520: Outer Bead

530: barrier

541: first channel 542: second channel

Claims (3)

A plurality of plates 500 are stacked to form a first medium space 100 through which a first heat exchange medium flows on a portion of the plate 500 facing the front surface (A surface) of the plate 500 and coupled to each other. A second medium space 200 in which a second heat exchange medium flows is formed at a portion of the rear surface B facing each other, and the plate 500 includes a first heat exchange medium as the first medium space 100. A first medium inlet 121 and a first medium outlet 122 formed in a through shape so as to be introduced and discharged, 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; 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; In the heat exchanger 1000, In the plate 500, a plurality of V-shaped beads 510 are formed in an inner region, and the beads 510 are connected to each other in a pair of the plates 500, which are vertices of one plate 500. Vertices of the other plate 500 coupled with the one plate 500 is disposed at the center position between the two, so that the V-shaped vertex portions for each plate 500 are spaced apart so as not to meet each other. Plate heat exchanger. The method of claim 1, wherein the plate 500 The bead 510 positioned at the center of the plate 500 is formed in a line symmetric shape, and the bead 510 is formed such that the line connecting the V-shaped vertices of the bead 510 coincides with the line symmetric center line. Plate heat exchanger. The method of claim 2, wherein the plate 500 The first medium inlet 121 and the first medium outlet 122 are disposed to be spaced apart from each other by a predetermined distance with respect to a line symmetric center line, and the second medium inlet 221 and the second medium outlet in the other direction. 222 is spaced apart a predetermined distance, the plate heat exchanger characterized in that the front (A side) or rear (B side) facing each other when coupled to each other disposed in a state rotated 180 °.

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