KR101203674B1 - Heat exchanger plate and heat exchanger using heat exchanger plate. - Google Patents

Abstract

The heat exchanger plate for plate heat exchanger provided by the present invention is provided between a first through hole provided in one side upper and lower corners of the plate shape and a second through hole provided in the other upper and lower corners and the first through hole or the second through hole. Leakage of the main heating portion consisting of a plurality of bent patterns formed, the dispersion portion including the concave-convex line pattern and the convex-concave line pattern, any one of the first and second through holes and the region including the main heat transfer portion and the dispersion portion And a gasket mount that can be mounted with a gasket for blocking. In addition, the plate heat exchanger heat transfer plate provided by the present invention may be made of aluminum or an aluminum alloy in which an anodization film is formed to increase heat transfer, and the anodization film may be formed using a direct current pulse wave or a direct current / AC pulse wave. In addition, a heat exchanger plate for a plate heat exchanger is formed by attaching a fluorine resin to the heat transfer plate after the anodization film is formed.

Plate heat exchanger, aluminum, anodized film, DC / AC mixed pulse wave

Description

Heat exchanger plate and plate heat exchanger using the same {Heat exchanger plate and heat exchanger using heat exchanger plate.}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat exchanger plate and a plate heat exchanger manufactured using the same, and more particularly, to a heat exchanger plate and a plate heat exchanger manufactured by using the same in a ship's cooler or evaporator and other industrial devices requiring corrosion resistance against seawater.

A heat exchanger is a device that heats or cools a desired fluid using heat transfer from one fluid to another fluid. Among these heat exchangers, a plate heat exchanger stacks a plurality of thin and corrugated heat transfer plates between the front frame and the rear frame, and alternately flows the heated fluid and the heated fluid through the flow path formed between the stacked heat transfer plates, so that heat exchange between the fluids may occur. Device to ensure that A plurality of heat transfer plates are sequentially stacked to form a heat exchange plate plate (plate pack) formed with a fastening means such as a high tension fastening bolt between the front frame and the rear frame. In this case, a rubber gasket is installed at the edge of the heat transfer plate, and when the heat transfer plates are stacked up and down, the two heat transfer plates are in close contact with each other with the gasket therebetween to prevent leakage of fluid flowing through the flow path. In such a structure, the heating fluid and the heated fluid flow alternately along each other along separate flow paths to perform heat transfer through the heat transfer plate. In this case, the plate heat exchanger may allow the heating fluid and the heated fluid to face each other in a flow direction of the fluid in order to increase the effect of heat transfer.

As a heat exchanger plate material of the heat exchanger, a material having excellent heat transfer rate and strong corrosion resistance is required, and is made of titanium (Ti) or stainless steel.

Such a plate heat exchanger is important to increase the heat transfer efficiency between the heating fluid and the heated fluid flowing in the counter flow with each other. Therefore, it is necessary to design the flow path of the heat transfer plate so that the flow of the fluid flowing along the flow path becomes more efficient for heat transfer. In addition, it is necessary to use a material having excellent heat conductivity and excellent corrosion resistance to the external environment as a material of the heat transfer plate serving as a heat transfer medium.

The heat exchanger plate for plate heat exchanger provided by the present invention is provided between a first through hole provided in one side upper and lower corners of the plate shape and a second through hole provided in the other upper and lower corners and the first through hole or the second through hole. A center of the first through hole and the second through hole formed between the main heat transfer part and the first through hole or the second through hole and the main heat transfer part formed of a plurality of curved patterns to be formed and diagonally positioned on the plate shape. Concave-convex line pattern in which concave-convex lines are linearly spaced apart in a direction forming a predetermined angle with the connecting line, and a perpendicular line extending from one side of the heat transfer plate on which the first through hole is formed to the other side on which the second through hole is formed. Dispersion portion formed with a convex concave-convex line pattern made of convex concave and convex corresponding to the concave-convex concave on the basis of the center line The first and second through-hole which includes one with the yeolbu weeks and gasket mounting portion, which may be a gasket for blocking the leakage of the region containing the portion of the fitted distribution.

In this case, the convex-concave line pattern and the concave-convex line pattern may be provided in plural numbers extending in parallel.

In addition, a rhombus-shaped pattern may be formed in the dispersion part, in which two concave-convex and two convex-convex concave and convex convex portions each constitute a pair of parallel sides.

Meanwhile, convex concave or concave concave and convex concave and convex concave and convex concave and convex concave and convex concave and convex concave and convex concave and concave concave and convex concave and convex concave and convex concave and concave concave and concave concave and concave concave and concave concave and concave concave and concave concave and concave concave and concave concave and concave concave and concave convex concave and concave concave and concave concave and concave concave and concave concave and concave concave and concave concave and concave concave and concave concave and concave concave and concave concave and concave concave and concave concave and concave concave And a spaced area on the convex-concave line pattern closest to the second through part.

Meanwhile, convex concavities and convexities are formed inside the rhombus-shaped pattern disposed below the concave-convex line pattern closest to the first through hole, and concave inside the rhombus-shaped pattern positioned below the concave-convex line pattern closest to the second through hole. Unevenness may be formed.

On the other hand, the first through-hole has a convex concave and concave convex having a first length and a second length less than the first length along the circumference, the concave and convex of the second length formed and, there is a concave irregularities having the first length formed between the convex irregularities having a second length, the second concave convex along the through sphere circumference having a convex irregularities and the second length having a first length It can be formed alternately.

In this case, when the first through hole and the second through hole have an arbitrary heat transfer plate as a lower plate, and the same heat transfer plate as the heat transfer plate is rotated 180 degrees, and laminated on the upper plate, the second length of the first through hole circumference of the lower plate The convex convex and the convex concave having a second length of the first through hole circumference of the upper plate and the convex convex having the first length of the second through hole circumference of the lower plate and the second of the upper plate It is possible to form the closed mouth portion formed while the concave-convex concave-convex having the first length of the through hole is in contact.

On the other hand, the gasket mounting portion may be designed so that the gasket is seated on the center in the center of the height of the unevenness or wrinkles protruding upward or downward in the normal direction of the heat transfer plate plane, the plate-shaped one side upper and lower and the other side upper and lower parts Concave-convex pattern may be formed.

In addition, the plate heat exchanger heat transfer plate provided by the present invention is a heat exchanger plate for the plate-shaped heat exchanger including a through-hole passing through the plate-shaped corner portion and the through hole facing each other, the heat transfer plate is aluminum or aluminum with anodization film formed It is made of an alloy and the anodization film may be formed using a direct current pulse wave or a direct current / alternating pulse wave.

In this case, the DC pulse wave may be a DC / DC mixed pulse pile obtained by synthesizing two or more DC pulse waves different from each other at which a positive voltage is applied.

In addition, the DC / AC mixed pulse wave may be a DC / AC mixed pulse wave including a curvature component in which the pulse waveform is convex upward when falling from the peak voltage with time, and a negative voltage between sections in which a positive voltage is applied. Can be applied. In addition, the DC / AC mixed pulse wave may change at least one of a section in which a positive voltage is applied in a unit pulse and a section in which a positive voltage is not applied.

In this case, the anodic oxide film formed by using the DC / AC pulse wave may be coated with the thickness of 300 μm or less (excluding 0).

In the plate heat exchanger manufactured using the heat transfer plate according to the present invention, the heating fluid and the heated fluid moving along the flow path formed between the stacked heat transfer plates form a vortex to improve the heat transfer efficiency between the two fluids. In addition, since the flow rate introduced from the opening oriented on one side of the heat transfer plate is sufficiently dispersed by the dispersion unit and moves to the main heat transfer unit, heat transfer may occur uniformly in the entire area of the main heat transfer unit.

On the other hand, by using aluminum or aluminum alloy material coated with a new anodizing method, the heat exchanger plate can be manufactured at a lower cost than a plate heat exchanger manufactured using titanium or stainless steel, but at least about 20% in thermal conductivity. An increasing effect can be obtained. In addition, when the oil is used for cooling, the viscosity of the oil flowing through the flow path is maintained constant by the far infrared rays radiated from the anodization film on the surface of the heat transfer plate, thereby smoothing the flow and increasing the service life by preventing degradation.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the present invention. In the following description of the present invention, detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

1 is a plan view of a heat exchange plate for a plate heat exchanger according to an embodiment of the present invention. As shown in FIG. 1, the heat transfer plate has a rectangular plate shape, and four corner portions are provided with through holes 11a, 11b, 12a, and 12b penetrating through the plate shape. In addition, an uneven pattern having a convex or concave shape in the normal direction of the plane of the heat transfer plate is formed to form a flow path when the two heat transfer plates overlap each other.

Specifically, the first through holes 11a and 11b penetrating the upper left and lower corners of the plate shape and the second through holes 12a and 12b penetrating the upper right and lower corners are provided. 11a and 11b and the second through holes 12a and 12b respectively form a fluid conduit through which the fluid circulates when the heat transfer plates are stacked, and openings through which the fluid is introduced into or discharged from the fluid conduit. Can be. In the middle of the heat transfer plate between the first through holes 11a and 11b or the second through holes 12a and 12b, a main heat transfer part 13 through which heat is transferred between the heated fluid and the heated fluid moving through the flow path is formed. . On the other hand, between the four through holes (11a, 11b, 12a, 12b) and the main heat transfer portion 13 is provided with a dispersion portion 14 formed to uniformly distribute the fluid moving to the main heat transfer portion (13). Meanwhile, reference numeral 15 denotes a gasket mounting portion in which a gasket is mounted to be inserted between the heat transfer plates stacked on each other to prevent leakage of fluid moving through the flow path to the outside.

2A and 2B show a plan view of the heat transfer plate after the first gasket 20a and the second gasket 20b are mounted. As shown in FIG. 2A, the first gasket 20a has both through holes 11a and 11b and the dispersing portion 14 so that the first through holes 11a and 11b at the upper left side and the lower left side of the heat transfer plate can be opened to each other. ) And the region including the main heat transfer portion 13 is blocked from the outside, and the second through holes 12a, 12b on the upper right side and the lower right side of the heat transfer plate are mounted on the gasket mounting portion so that each can be blocked from the outside. On the other hand, the second gasket 20b has both through holes 12a and 12b and the dispersion part 14 so that the second through holes 12a and 12b on the right side and the right side of the heat transfer plate can be opened to each other as opposed to the first gasket. The area including the main heat transfer part 13 is blocked from the outside, and the first through holes 11a and 11b on the upper left side and the lower left side of the heat transfer plate are mounted so that each can be blocked from the outside. Therefore, a flow path may be formed between the upper left and the lower left first through-hole between the heat transfer plates stacked between the first gasket 20a, whereas the right side of the second gasket 20b is disposed between the heat transfer plates. A flow path may be formed between the second through hole above and below the right side.

3 illustrates a plate heat exchanger configured by fastening a plurality of heat transfer plate assemblies overlapping a heat transfer plate assembly between the front frame F1 and the rear frame F2 according to an embodiment of the present invention. In this case, the heat transfer plate assembly according to the present invention forms a flow path between the heat transfer plates by stacking the same two heat transfer plates 180 degrees each other. Therefore, as a result of alternately stacking an arbitrary first heat transfer plate and a second heat transfer plate rotated 180 degrees therewith, the first fluid conduits 3a and 3b formed by stacking first through holes in the heat transfer plate assembly and the first heat transfer plate are alternately formed. Second fluid passages 3c and 3d are formed by stacking two through holes.

In this case, as shown in FIG. 3, the arbitrary first heat transfer plate P1 and the second heat transfer plate P2 disposed at the rear thereof are stacked with the first gasket 3e interposed therebetween and overlap the second heat transfer plate P2 at the rear thereof. The first heat transfer plates P1 'are stacked with the second gasket 3f interposed therebetween. At this time, the first heat transfer plate P1 and the second heat transfer plate P2 are compressed and stacked with the first gasket 3e interposed therebetween, so that the fluid can move only in the interior surrounded by the gasket 3e.

In this case, the heat transfer plate assemblies P1 and P2 assembled by inserting the first gasket 3e may move only the fluid including the first through holes 11a and 11b, and thus, the first fluid line 3a, The fluid flowing along 3b) may be introduced into the heat transfer plate through an opening formed by stacking the first through holes. On the other hand, the part in which the second through hole is stacked forms a closed part, and the fluid flowing through the second fluid pipes 3c and 3d cannot be introduced into the heat transfer plate. In the same principle, the fluid flowing along the second fluid passages 3c and 3d is introduced into the heat exchanger plate through an opening formed by stacking second through holes of the heat transfer plates P2 and P1 'into which the second gasket 3f is inserted. However, the portion where the first through hole is stacked becomes a closed part. The heat transfer plate assembly alternately mounts the first gasket 3e and the second gasket 3f so that the first and second fluid lines 3c and 3d move along the first fluid lines 3a and 3b. The moving second fluids are alternately introduced into the heat transfer plate. Accordingly, the first fluid and the second fluid are separated by the heat transfer plate and move independently, and heat transfer occurs between the first fluid and the second fluid through the heat transfer plate therebetween. For example, on the second heat transfer plate P2 of FIG. 3, a flow in which the first fluid introduced into the heat transfer plate from the first fluid pipe 3a in the upper portion is discharged to the first fluid pipe 3b in the lower portion through the main heat transfer portion is illustrated. On the first heat transfer plate P1 ′, a flow in which the second fluid introduced into the heat transfer plate from the lower second fluid pipe 3c is discharged to the upper second fluid pipe 3d through the main heat transfer unit is illustrated.

At this time, for example, the first fluid passages 3a and 3b constitute a path through which the first fluid (heating fluid) at a high temperature moves, and the second fluid passages 3c and 3d are second fluids (heated to be heated). Can constitute a path through which the fluid moves. At this time, the first fluid passage (3a, 3b) and the second pipeline (3c, 3d) is formed to extend to the heat transfer plate is not formed through the through hole is provided immediately before the rear frame.

The opening portion and the closing portion described above are determined by the shape of the convex-convex and concave-convex concavities formed along the through-circumference circumference. That is, in the through hole of the present invention, an uneven pattern is formed in which convex unevenness convex upward and concave uneven recess downwardly are formed along the circumference in the normal direction of the heat transfer plate plane. At this time, the shapes of the uneven patterns of the first through hole and the second through hole circumference are different from each other. As an example, the convex and concave and convexities of the circumference of the first through holes 11a and 11b of FIG. 1 have both a first length and a second length, and concave and convexities of a second length between the convex and convexities having the first length. Is provided, and between the convex convex-convex which has a 2nd length, the concave-convex convex which has a 1st length is provided. On the other hand, the convex convex and convex portions of the second through holes 12a and 12b have a first length, and the concave and convex convex portions have a second length. In this case, when the heat transfer plates having such a configuration are rotated by 180 degrees, the openings of FIG. 4A and the closed openings of FIG. 4B are formed as a result of the uneven patterns of the circumference of the through hole being stacked on each other. That is, when the heat transfer plate illustrated in FIG. 1 is used as the bottom plate, and the heat transfer plate illustrated in FIG. 1 is rotated 180 degrees on the top plate, the second length of the first through hole circumference 40 of the bottom plate is formed as shown in FIG. 4A. The second passage of the lower plate as shown in FIG. 4B and the first flow path space 42 formed while the convex convex and concave and convex portions 40a and the concave-convex portion 41a having the second length of the first through hole circumference 41 of the upper plate are in contact with each other. The second flow path space 45 formed while the convex concave-convex 43a having the first length of the spherical circumference 43 and the concave-convex 44a having the first length of the second through-hole circumference 44 of the upper plate abuts against each other. Is formed. At this time, the first length has a larger value than the second length, and thus, the first flow path space 42 has a larger flow path cross-sectional area than the second flow path space 45. Accordingly, the first gasket is disposed as shown in FIG. 2A so that the fluid can be moved to the first flow path space 42 and the fluid movement is blocked to the second flow path space 45. Accordingly, the first flow path space 42 is actually an opening for moving the fluid to the heat transfer plate, but the second flow path space 45 has a small cross-sectional area and a very small flow rate that can pass therethrough, and also through the flow path space 45. Even if it is injected, the gasket formed around the through hole becomes a closed part that is blocked from moving to the heat transfer plate. This configuration increases the amount of fluid moving inside the heat transfer plate through the opening with a large cross-sectional area, effectively blocks the movement of fluid in the closed port, and reduces the pressure of the fluid on the gasket. Can be increased.

As shown in FIG. 1, the dispersion part 14 is formed between the first through holes 11a and 11b or the second through holes 12a and 12b and the main heat transfer part 13, and the first through holes 11a, 11b) and the second through holes 12a and 12b are bounded by the gasket mounting portion 15. The dispersion part 14 serves to uniformly distribute the introduced fluid. For example, when the first gasket is mounted as shown in FIG. 2A, the fluid introduced through the opening formed by stacking the first through holes 11a is stacked. By dispersing the more uniformly move to the main heat transfer. 5 illustrates the concave-convex structure inside the dispersion unit, and the concave-convex structure of the dispersion unit will be described in detail with reference to FIGS. 1 and 5. A plurality of concave-convex concave-convex portions 50 are spaced apart from each other in a direction forming a predetermined angle on a diagonal line connecting the centers of the through holes facing each other, for example, the upper first through hole 11a and the lower second through hole 12b. While the linearly concave-convex line pattern 50a is formed. In addition, the concave-convex concave and convex portions 50 may be divided into orthogonal lines perpendicular to a vertical line extending from one side of the heat transfer plate on which the first through holes 11a and 11b are formed to the other side on which the second through holes 12a and 12b are formed. The convex-convex line pattern 51a formed of the convex-convex concave and convex portions 51 formed at positions symmetrical to each other is formed. In this case, the concave-convex line patterns 50a are provided in plural numbers which are spaced apart from each other and extend in parallel. Therefore, the convex concave-convex line patterns 51a are also provided in plural, which are spaced apart from each other and extend in parallel. The concave-convex line pattern 50a maximizes the heat transfer efficiency by allowing the fluid introduced from the first through hole 11a to be uniformly dispersed throughout the main heat transfer part.

At this time, between the dispersion portion 14, the first through portion (11a) and the second through portion (12a) is a gasket mounting portion extending in a linear form, respectively, and symmetrical with respect to the center line. Therefore, the overall shape of the dispersion portion 14 is formed between the concave-convex line pattern 50a and the second through portion parallel to the gasket mounting portion formed between the dispersion portion 14 and the first through portion 11a. The convex concave and concave and convex concave and convex concave and convex concave and convex concave and convex concave and convex concave and convex concave and convex concave and convex irregularities Are arranged. At this time, as an example, as shown in FIG. 5, a rhombus-shaped pattern may be formed in the dispersion part, in which two convex unevennesses and two concave-convex unevennesses each constitute a pair of parallel sides.

The concave-convex pattern inside the dispersion portion affects the flow of the fluid, so that the fluid becomes more vortex together with the effect of dispersing the fluid, thereby further increasing the heat transfer efficiency between the fluids. In other words, due to the complexity of the flow path formed by the convex and concave and convex concave and convex concave and convex concave and convex irregularities, the moving fluid forms a strong vortex, thus exhibiting a better heat transfer effect than the general laminar flow.

On the other hand, since the first through holes 11a and 11b forming the first fluid passage through which the first fluid flows are biased to one side of the heat transfer plate, for example, as shown in FIG. 1, the fluid moving in the heat transfer plate may be biased to the left side. This may make it difficult to transfer heat evenly across the plate. Accordingly, concave and convex concave and convex concave and convex concave and convex concave and convex concave and convex concave and convex concave and convex concave and convex concave and convex concave and convex concave and convex concave and convex concave and convex concave and convex concave and convex concave and concave concave and convex concave and concave concave and convex concave and concave convex concave and convex concave convex concave and convex concave and concave convex concave and concave concave spaced areas on the nearest convex irregularities line pattern (51a) in the through-section has a convex irregularities 52 and concave irregularities 53 can be formed. Convex irregularities 52 formed in the spaced region of the concave convex line pattern is distant area from the first through hole (11a) in which the fluid is introduced to act as a by for stopping the flow of the introduced fluid barrier, that is, Fig. Dispersing the fluid so that the fluid can be sufficiently moved in the right direction of 5 to evenly heat transfer throughout the heat transfer plate, the concave-convex 53 formed in the separation region on the convex concave-convex line pattern is a fluid that has moved from the left side To make room for moving smoothly.

Further, the first through-hole (11a) and the nearest concave convex line pattern (50a) lower portion wherein the rhombus shape of the pattern inside the convex irregularities 54 in the is formed, the closest convex irregularities and the second through-hole (12a) A concave-convex concave-convex 55 may be formed in the rhombus-shaped pattern positioned below the line pattern 51a. At this time, the convex concave and convex concave and convex concave convex concave convex concave convex concave convex concave convex concave concave convex concave convex concave convex concave convex concave convex concave concave convex concave convex concave convex concave convex concave (convex concave convex concave convex concave convex concave convex concave convex concave convex concave convex concave concave convex concave convex concave convex concave convex concave convex concave convex concave convex concave convex concave convex concave convex concave convex concave convex concave convex concave convex concave convex concave (convex concave concave convex concave convex concave convex concave) The convex pattern 54 formed as described above may further improve the function of preventing the flow of the fluid moved to the left side, and the concave pattern 55 formed at the right side symmetrical with respect to the center line may flow the fluid that has moved from the right side. Make room for smoothing.

The main heat transfer portion 13 is formed with a pleat portion formed of a plurality of pleats of the ridges and valleys, wherein each pleat has a chevron shape that is curved in a "V" shape. At this time, the angle formed by the "V" shape of the wrinkles is called the chevron angle (chevron angle, CA). At this time, the smaller the chevron angle, the larger the heat loss per unit area, but the greater the pressure loss. On the contrary, the larger the chevron angle, the lower the heat transfer per unit area, but the lower the pressure loss. Therefore, it is important to optimize the heat transfer and pressure loss per unit area by maintaining the proper angle.

Figure 6 shows a cross-sectional structure of the gasket mounting portion according to an embodiment of the present invention. Gasket mounting portion 60 according to an embodiment of the present invention is designed to be seated in the center of the height (t) of the irregularities or wrinkles protruding upward or downward in the normal direction of the heat transfer plate plane. Therefore, since the gasket does not belong to any structure of the upper plate and the lower plate, it is easy to assemble. When the pressure is applied after the assembly, the gasket is already seated on the gasket mounting part. It is easy. In addition, the fluid moving through the flow path is blocked by movement of the gasket side, the leakage blocking effect is increased compared to blocking the leakage by the contact surface between the conventional gasket and the gasket mounting portion.

In addition, uneven patterns may be formed on the plate-shaped upper and lower sides and the upper and lower sides of the other side. As an example, FIGS. 7A to 7D illustrate a plan view of a heat transfer plate in which display patterns each having one, two, three, and four unevennesses are formed at four corners of the heat transfer plate. Such a display pattern is provided to make it easy to check the visual inspection of the side surface of the heat transfer plate assembly whether the heat transfer plate assembly in which the plurality of heat transfer plates are stacked is abnormal. Since the heat transfer plate assembly is stacked by rotating the same heat transfer plate 180 degrees to each other, when a plurality of heat transfer plates are stacked in the correct order, the display pattern having one unevenness and the display pattern having four unevennesses are located on the left side of the long axis side of the heat transfer plate assembly. The stacked parts are alternately stacked, and on the right side, two uneven display patterns and three uneven display patterns are alternately stacked. By observing the stacking order of the display patterns shown on the side of the heat plate assembly, it is possible to easily observe whether the heat transfer plate stacking order is abnormal.

On the other hand, as the heat transfer plate material of the present invention, aluminum or aluminum alloy may be used on the surface in addition to titanium and stainless steel. Aluminum has excellent thermal conductivity and low cost compared to titanium and stainless steel. At this time, in order to improve the corrosion resistance of aluminum, in particular in the seawater environment it can be formed on the surface of the anodized film. In addition, after forming the anodized film, the fluorine resin may be adhered as a post-process to greatly improve chemical resistance to seawater and various chemical substances. The anodization film of an embodiment according to the present invention is formed by anodization using a direct current as a power source for anodization, as well as anodization using a direct current pulse or a DC / AC synthetic pulse wave in which a direct current pulse and an ac pulse are synthesized. It is possible. 8 illustrates an anodization apparatus for forming an anodization film according to an embodiment of the present invention, and FIG. 9 illustrates a power supply apparatus capable of supplying all of the above-described types of power sources.

As shown in FIG. 8, the anodic oxidation apparatus includes an anode 82 and a cathode 83 and an anode 82 and a cathode 83 that are immersed into an electrolytic cell 80 and an electrolyte 81 filled with an electrolyte 81. And a power supply device 84 for supplying power between the terminals. In some cases, a stirring means may be provided in the lower part of the electrolytic cell 80 for the purpose of removing bubbles generated on the surface of the aluminum member used as the anode and obtaining a uniform and smooth anodization film.

The power supply 84 applies an anodic oxide film between the anode and the cathode by applying a normal DC voltage or a DC / AC mixed pulse wave formed by synthesizing a DC pulse wave or a DC pulse wave and an AC pulse wave. A device that can be formed includes a rectifier modulator 92, an AC modulator 93, a pulse wave combiner 94, and a controller 95 as shown in FIG.

The rectifier modulator 92 may rectify an AC voltage input from the AC power source 91 to form a DC pulse wave, and modulate and output a period or amplitude (ie, a voltage value) of the DC pulse wave. In this case, the rectifying modulator 92 may be configured as one stop value or two or more stop values operated independently of each other. 9 illustrates a case in which the rectifying modulator 92 is composed of two stop values of the first stop value 92a and the second stop value 92b.

The AC modulator 93 may output an AC pulse wave modulated by a period or amplitude of an AC voltage input from an AC power source.

The pulse wave synthesizing unit 94 synthesizes each DC pulse wave that is modulated and output from one or more stops constituting the rectifying modulator 92 to output a DC / DC mixed pulse wave, or the DC pulse wave and the AC modulator. Synthesizes an AC pulse wave output from 93 and outputs a DC / AC mixed pulse wave. For example, as shown in FIG. 9, when the rectifying modulator 92 includes the first stop 92a and the second stop 92b, the first stop 92a and the second stop ( 92b), the first DC pulse wave and the second DC pulse wave modulated to different periods and amplitudes, and the AC pulse wave modulated and output from the AC modulator 93 are all pulse wave synthesizers 94. ) Can be synthesized.

The controller 95 is connected to the rectifier modulator 92 and the AC modulator 93 to control the operation of the rectifier modulator 92 and the AC modulator 93 to control the characteristics of the pulse wave output therefrom. I can regulate it.

In this case, a switch may be further provided between the rectifier modulation unit 92 and the AC power supply 91 or between the AC modulation unit 93 and the AC power supply 91, and the control unit 95 may turn on / off the switch. You can perform more control functions. By controlling such a switch, the output of the DC pulse wave and the AC pulse wave to the pulse wave combining unit 94 can be controlled. For example, as shown in FIG. 9, the first switch 96a, the second stop 92b, and the first switch 96a and the second switch between the AC modulator 93 and the AC power supply 91, respectively. By controlling the arrangement 96b and the third switch 96c, it is possible to control the shape of the pulse output to the pulse wave combining unit 94.

The shape of the synthesized pulse wave depends on the type of the DC pulse wave or the AC pulse wave input. Therefore, the control unit 95 outputs the DC pulse wave and the AC output from the rectifying modulator 92 and the AC modulator 93, respectively. By adjusting and controlling the shape of the pulse wave, the shape of the desired power supply can be determined in the pulse wave combining unit 94.

These pulsed waves can be characterized using a work cycle. As shown in FIG. 10, the work cycle may be expressed as the ratio of the time Ton at which the voltage for anodization (ie, a positive voltage) is applied and the time Toff at which the voltage for anodization is not applied, and are expressed as follows. do.

Work cycle (%) = [Ton / (Ton + Toff)] × 100

By changing the ratio of Ton and Toff in the pulse wave working cycle, the characteristics of the pulse wave can be changed.

11A to 11C illustrate exemplary embodiments of DC pulse waveforms that may be implemented by the above-described power supply. FIG. 11A is a first-stage constant load DC pulse wave in which unit pulses are kept constant, and FIG. 11B is a pulse wave in which the Ton section is changed or the Ton section and the Toff section are changed together in accordance with the progress of the pulse wave. 11C shows a two-stage constant load pulse wave in which a unit cycle is constant and a section in which two different voltage values TH and TL are maintained in a Ton section of the unit cycle is present.

12A to 12C illustrate exemplary embodiments of a DC / AC mixed pulse wave that may be implemented by the above-described power supply.

The DC / AC mixed pulse wave as shown in FIG. 12A is characterized by having a peak voltage caused by an AC pulse wave during a Ton period in a unit pulse, wherein the peak voltage is the highest voltage value in the unit pulse. It will show a relatively low voltage. In this case, the peak voltage is preferably present at the start of the Ton section of the pulse. It may also include curvature components in which the pulse waveform is convex upward when falling from the peak voltage over time. In addition, as shown in FIG. 12A, the DC / AC mixed pulse wave may have a pulse having a negative voltage value between the end point of the Ton section and the start point of the next Ton section (that is, the Toff section). On the other hand, the variable load variable frequency pulse wave is a pulse wave in which the Ton section is changed or the Ton section and the Toff section are changed as the pulse wave progresses. FIG. 12B shows a pulse wave in which the Ton and Toff sections are simultaneously changed. It is. 12A and 12B show a form in which an AC pulse wave is synthesized in a single stage DC pulse wave, and it is also possible to synthesize using a two stage DC pulse wave as shown in FIG. 12C.

By using the above-described anodizing power supply device, a DC pulse wave, a DC / DC mixed pulse wave, and a DC / AC mixed pulse wave are possible. In particular, by using a DC / AC mixed pulse wave having a peak voltage at the start of the pulse In the case of anodizing, an anodizing film having a thickness of up to 300 μm and having a very uniform structure can be formed on the aluminum plate. When manufacturing a plate heat exchanger with a heat transfer plate coated with an anodization film, it is possible to excellently improve the corrosion resistance of aluminum by coating a dense anodization film on aluminum having excellent thermal conductivity compared to titanium or stainless steel. As shown in FIG. 13, the thermal conductivity test results of 0.5 mm thick titanium and stainless steel and 0.8 mm aluminum showed the best thermal conductivity. In Table 3, titanium and stainless steel corrosion resistance data are cited from references (signature: Corrosion resistance tables: metals, plastics, nonmetallics, and rubbers, author: Schweitzer, Philip A, publisher: M. Dekker, year of publication: 1985). According to the present invention, the aluminum member on which the anodization film is formed and the seawater corrosion resistance are indirectly compared. Based on this data, it can be seen that the aluminum products to which the technique is applied have excellent seawater corrosion resistance compared to titanium and stainless steel.

Ti SUS 316 Al6061 Al (40 μm) Al (70 μm) Al (100 µm) Corrosion resistance
(Seawater, mm / year) 0.05 0.50 0.70 0.00 0.00 0.00

On the other hand, the aluminum oxide film, which is an anodized film, emits far infrared rays as the temperature increases. 14 shows the far infrared results in anodized aluminum. Such far infrared rays are irradiated on the engine oil for ship engines to induce molecular activation and fine molecularization of the engine oil. Therefore, as the fluidity of the engine oil is improved, the lubrication and cooling characteristics are improved, and the oxidation of the engine oil is also prevented. Therefore, when the anodic oxide film is applied to a plate heat exchanger that cools the engine oil for ships, the fine particles of the engine oil are atomized by far infrared rays from the anodic oxide film coated on the heat transfer plate while the hot engine oil moves along the flow path of the heat transfer plate. By improving the viscosity of the engine oil, not only the heat transfer efficiency with the low temperature fluid can be improved, but also the effect of increasing the characteristics and life of the engine oil can be obtained.

The above-mentioned embodiments are illustrative rather than limiting on the present invention, and those skilled in the art can design many other embodiments without departing from the scope of the present invention as defined by the appended claims. In addition, it will be apparent that the technology of the present invention can be easily modified by those skilled in the art, such modified embodiments will be included in the technical spirit described in the claims of the present invention.

1 is a plan view of a heat transfer plate for a plate heat exchanger according to the present invention.

2A and 2B are plan views of a heat transfer plate mounted with a first gasket and a second gasket according to the present invention.

Figure 3 shows the fluid movement in the plate heat exchanger.

4 is a view showing an opening part and a closed part when the heat transfer plates are stacked up and down.

5 is an enlarged view of the upper portion of FIG. 1.

6 is a cross-sectional view of the gasket mounting portion.

7A to 7D illustrate the uneven pattern disposed at the corners of FIG. 1.

8 illustrates anodization apparatus of an aluminum member constituting the heat transfer plate according to the present invention.

FIG. 9 illustrates a power supply device used in the anodizing device of FIG. 8.

10 shows Ton and Toff of a pulse wave.

11A to 11C illustrate waveforms of DC pulse waves according to the present invention.

12A to 12C illustrate waveforms of DC / AC pulse waves according to the present invention.

Figure 13 compares the thermal conductivity of titanium, stainless steel and aluminum.

14 is a wavelength emission curve of an aluminum oxide film with temperature.

<Brief description of the major symbols in the drawings>

11a, 11a, 12a, 12b: through hole 13: main heat transfer portion

14 dispersion part 15 gasket mounting part

20a, 20b: Gasket 50: Concave-convex

50a: concave-convex line pattern 51: convex concave-convex

51a: convex-convex line pattern

Claims (21)

A first through hole provided in one upper and lower corners of the plate shape and a second through hole provided in the upper and lower corners of the other side; A main heat transfer part including a plurality of bending patterns formed between the first through hole and the second through hole; The concave-convex recesses are formed between the first through hole or the second through hole and the main heat transfer part, and the concave-convex irregularities are linearly formed in a direction forming a predetermined angle with the center connection line of the first through hole and the second through hole diagonally positioned on the plate shape. The concave-convex line pattern spaced apart and the vertical line extending from one side of the heat transfer plate on which the first through hole is formed to the other side on which the second through hole is formed are orthogonal to each other and symmetrically correspond to the concave-convex surface on the basis of the center line. Dispersion portion is formed a convex concave-convex line pattern made of convex concave-convex; And And a gasket mounting portion to which a gasket for blocking leakage of an area including one of the first through hole and the second through hole and the main heat transfer part and the dispersion part may be mounted. An anodized film formed by using a mixed pulse wave in which an alternating pulse wave and at least one direct current pulse wave are synthesized comprises aluminum or an aluminum alloy formed on a surface thereof. Heating plate for plate heat exchanger, the voltage is to appear. The method of claim 1, The concave-convex line pattern and the convex concave-convex line pattern are provided with a plurality of plate heat exchangers are provided in plurality spaced apart from each other extending in parallel. The method of claim 2, The plate for heat exchanger plate is formed inside the dispersion portion is a rhombus-shaped pattern consisting of two parallel concave-convex concave and convex concave-convex, respectively, a pair of parallel sides. The method of claim 2, Plates for heat exchanger plate convex concave or concave concave and convex irregularities are formed in the spaced areas on the concave-convex line pattern and convex concave-convex line pattern, respectively. 5. The method of claim 4, The convex or concave convex irregularities is closest concave convex line pattern and the second plate heat exchanger heat transfer plate is formed in the spaced areas on the nearest convex irregularities line pattern perforations in the portion wherein each of the first through. The method of claim 3, wherein Convex concavities and convexities are formed inside the rhombus-shaped pattern positioned below the concave-convex line pattern closest to the first through hole, Concave-convex is formed inside the rhombus-shaped pattern positioned below the concave-convex line pattern closest to the second through hole.  Heat transfer plate for plate heat exchanger. The method of claim 1, The first through hole has a convexo-concave and concave-convex having a first length and a second length smaller than the first length along the circumference, and the concave-convex of the second length is formed between the convex and concave-convex having the first length. Between the convex convex and convex having the second length, concave and convex having the first length is formed, The second through hole is formed by alternately forming convex convexities having the first length and concave and convexities having the second length along the circumference. Heat transfer plate for plate heat exchanger. The method of claim 7, wherein In the case where the first through hole and the second through hole have an arbitrary heat transfer plate as a lower plate, and the same heat transfer plate as the heat transfer plate is rotated 180 degrees and laminated on the upper plate, An opening formed by convex convexities having the second length of the first through hole circumference of the lower plate and concave and convexities having the second length of the first through hole circumference of the upper plate abut; A closed portion formed by convex convexities having a first length of a second through hole circumference of the lower plate and a concave and convex portion having a first length of a second through hole of the upper plate. Heat plate for plate heat exchanger to form a. The method of claim 1, The gasket mounting portion is designed so that the gasket is seated at the center in the height direction of the irregularities or wrinkles protruding upward or downward in the heat transfer plate plane normal Heat transfer plate for plate heat exchanger. The method of claim 1, Heat transfer plate for plate heat exchanger is formed with a concave-convex pattern to be distinguished from each other on the upper and lower sides of the plate-shaped side and the upper and lower sides of the other side. The method of claim 1, The heat transfer plate is a heat exchanger plate for heat exchanger made of a material containing titanium, stainless steel, aluminum or aluminum alloy. The method of claim 11, Heat transfer plate for a plate heat exchanger is anodized film is formed on the aluminum surface. 13. The method of claim 12, Heat transfer plate for plate heat exchanger is formed by adhering the fluorine resin on the anodized film. In the heat transfer plate for a plate-shaped heat exchanger comprising a through-hole penetrating through the plate-shaped corner portion and the main heat transfer portion located between the through-holes diagonally opposite to each other, The heat transfer plate is made of aluminum or an aluminum alloy formed with an anodized film, the anodized film is formed using a mixed pulse wave synthesized by an AC pulse wave and at least one DC pulse wave, in the unit pulse of the mixed pulse wave The peak voltage appears at the start of the unit pulse, Heat transfer plate for plate heat exchanger. 15. The method of claim 14, The said mixed pulse wave is a heat exchanger plate for plate heat exchangers which synthesize | combined the 2 or more DC pulse wave and the said AC pulse wave from which mutually different time is applied. 15. The method of claim 14, The said mixed pulse wave contains the curvature component of which a pulse waveform is convex upward when it becomes strong from a peak voltage with time, The plate heat exchanger for plate heat exchangers. 15. The method of claim 14, The mixing pulse wave is a plate heat exchanger, a negative voltage is applied between the interval of the positive voltage is applied. 15. The method of claim 14, The mixed pulse wave is any one or more of a section in which a positive voltage is applied in a unit pulse and a section in which a positive voltage is not applied is changed according to the pulse propagation time. 15. The method of claim 14, The anodic oxide film formed using the mixed pulse wave is a heat transfer plate for a plate heat exchanger having a thickness greater than 0㎛ and 300㎛ or less. 20. The method of claim 19, A heat exchanger plate for a plate heat exchanger is formed by attaching a fluorine resin on top of the anodization film. The plate heat exchanger manufactured by using the heat exchanger plate for plate heat exchangers according to any one of claims 1 to 20.

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