JP5254244B2 - Plate heat exchanger - Google Patents

Description

  The present invention relates to a plate heat exchanger having a plurality of heat transfer plates according to the premise of claim 1. Such plate heat exchangers can be used in various fields, for example, in the combustion gas flow path of a combustion plant that obtains thermal energy from the combustion gas.

  In plate heat exchangers of the type described above, which are open outwards towards the peripheral edge sides and do not have a downwardly curved flange along the edge of each heat transfer plate, in connection with the mounting of the plate package It is difficult to guide the heat transfer plate. Therefore, when attaching the plate package and joining the heat transfer plates to each other, for example, when brazing the plate package after the attachment, each individual heat transfer plate is positioned correctly with respect to the other heat transfer plates. It is difficult. In order to guide and position the heat transfer plate, the current technology requires the use of various types of external guide members.

  U.S. Pat. No. 5,918,664 discloses a plate heat exchanger of the type defined at the beginning, having a plurality of heat transfer plates. Each heat transfer plate extends parallel to the main stretched surface. The heat transfer plates are provided close to each other, thus forming a plate package having a peripheral edge side and a first plate gap for the first medium and a second plate gap for the second medium. ing.

  Every other heat transfer plate is formed by a first heat transfer plate, the remaining heat transfer plates are formed by a second heat transfer plate, and such a first heat transfer plate is formed by such a first heat transfer plate. A pair of heat transfer plates is formed together with the two heat transfer plates to surround the first plate gap, and the plate package has a plurality of such heat transfer plate pairs. Each heat transfer plate has at least two port holes that extend through the plate package and form ports that communicate with the first plate gap. The heat transfer plate is configured such that the second plate gap is opened through the peripheral edge side surface.

  U.S. Pat. No. 5,967,227 discloses another type of plate heat exchanger having a plurality of heat transfer plates each extending parallel to the main stretch plane. The heat transfer plates are alternately provided close to each other to form a plate package. The heat transfer plate forms a first plate gap and a second plate gap for the first medium. The first and second plate gaps are sealed by a surrounding gasket. Each heat transfer plate extends through the plate package and forms two ports that form ports that communicate with the first plate gap, and extends through the plate package and communicates with the first plate gap. And two port holes forming a port. Each heat transfer plate has a curved portion at each corner that cooperates with a corresponding curved portion of an adjacent heat transfer plate in the plate package.

  The object of the present invention is to eliminate the above-mentioned problems and to facilitate the induction and positioning of the heat transfer plate associated with the mounting and joining of the plate package.

  The purpose of this is a plate heat exchanger of the kind defined at the outset, wherein such a first heat exchanger plate is placed in a position relative to an adjacent pair of heat exchanger plates. Each port hole of the heat transfer plate is realized by a plate heat exchanger that is configured to cooperate with the facing port hole of the second heat transfer plate.

  Two such curved portions cooperating with each other when the first heat transfer plate is placed in contact with the second heat transfer plate guides the two heat transfer plates to the correct position, and This position can be maintained during the overall installation and joining of the plate package and plate heat exchanger. When the two heat transfer plates are attached to each other, the two curved portions can prevent the heat transfer plates from being displaced or rotated relative to each other in a plane parallel to the stretched surface. In addition, the port holes are configured to cooperate with the corresponding pairs of adjacent pairs in the plate package to facilitate correct positioning of the different pairs relative to each other. Thus, the port holes contribute to guiding the heat transfer plate pair to a predetermined position relative to each other and maintaining this position of the heat transfer plate pair throughout the manufacturing process.

  In one embodiment of the present invention, each of the first and second heat transfer plates has a compression-molded pattern extending in the pressing direction with respect to the stretched surface, and the first curved portion is the first transfer plate. The second curved portion extends in the second direction with respect to the stretched surface of the second heat transfer plate, and the second curved portion extends in the first direction with respect to the stretched surface of the hot plate. The same direction extends in the opposite direction to the first direction. Because the curved portion extends in a direction different from the stretched surface and the direction in which the curved portion extends relative to the heat exchange pattern and the port region of the compression-molded plate, the curved portion advantageously has the plate pattern and the port region. In the molding process after the main compression molding. Accordingly, the first direction and the second direction can extend laterally or substantially laterally with respect to the stretched surface. Furthermore, each second heat transfer plate can be rotated 180 degrees with respect to each first heat transfer plate within the completed plate package. In this way, the first curved portion and the second curved portion extend in the same direction within the finished plate package, so that between the first curved portion and the second curved portion, and thus Appropriate shape matching and appropriate shape fixing can be performed between each pair of the first heat transfer plate and the second heat transfer plate.

  According to another embodiment of the present invention, each heat transfer plate extends along a longitudinal centerline extending through the curved portion. Furthermore, each second heat transfer plate in the plate package can be rotated 180 degrees around the center line of the heat transfer plate.

  According to another embodiment of the invention, the first and second heat transfer plates are joined together in a plate package so that they cannot be removed from each other. The plate package joined so as not to be removed can be realized by brazing, bonding, or welding.

  In another embodiment of the present invention, each first heat transfer plate has two first curved portions, and each second heat transfer plate has two second curved portions. Two such curved portions of each heat transfer plate are sufficient to position the heat transfer plates relative to each other as described above.

  According to another embodiment of the present invention, the two first curved portions are provided to face each other along the respective edges of the first heat transfer plate, and the two second curved portions are It is provided so as to face each other along each edge of the second heat transfer plate.

  According to another embodiment of the present invention, each port hole has a surrounding port region, and the port region around the first port hole of each heat transfer plate has a first height relative to the stretched surface. The port region around the second port hole of each heat transfer plate is arranged at another height with respect to the extending surface. Advantageously, the port area around the first port hole of the first pair of heat transfer plates fits into the port area around the second port hole of the adjacent second pair of heat transfer plates. Can be configured to. Then, the port region around the second port hole of the first pair of heat transfer plates is fitted to the port region around the first port hole of the adjacent second pair of heat transfer plates. Can be configured. In this way, the port holes contribute to guiding the heat transfer plate pair to a predetermined position relative to each other and maintaining this position of the heat transfer plate pair throughout the manufacturing process.

1 is an exploded perspective view of a plate heat exchanger according to an embodiment of the present invention. It is the figure seen from the top of the plate heat exchanger of FIG. FIG. 3 is a cross-sectional view of the plate heat exchanger along line III-III in FIG. 2. FIG. 4 is a cross-sectional view of the plate heat exchanger along line IV-IV in FIG. 2. It is a figure which shows a part of edge region V of a plate heat exchanger in detail. FIG. 3 is a simplified exploded perspective view of a plate package of a plate heat exchanger according to the present invention.

  The invention will now be described in more detail by way of description of non-limiting embodiments and with reference to the accompanying drawings.

  With reference to FIGS. 1-5, one embodiment of a plate heat exchanger is disclosed. The plate heat exchanger has a plurality of heat transfer plates 1 and 2. The heat transfer plates 1 and 2 are composed of a first heat transfer plate 1 and a second heat transfer plate 2. All the heat transfer plates 1 and 2 have a heat exchange function in the plate heat exchanger. Each of the heat transfer plates 1 and 2 extends in parallel to the main extending surface p. Please refer to FIG. The stretched surface p is a heat transfer plate 1 and 2 that each of the heat transfer plates 1 and 2 realizes a compression-molded pattern including a corrugated heat exchange pattern and a port region pattern. It can be regarded as penetrating the basic surfaces of the plates 1 and 2 and extending parallel to the basic surfaces.

  The heat transfer plates 1 and 2 are provided close to each other so as to form a plate package 3 having an edge side surface 4 extending around the plate package 3. The heat transfer plates 1 and 2 form a first plate gap 5 for the first medium and a second plate gap 6 for the second medium in the plate package 3. Please refer to FIG. The heat transfer plates 1 and 2 are also provided in the plate package 3 such that the first heat transfer plate 1 is disposed every other sheet and the remaining heat transfer plates become the second heat transfer plate 2. . As can be seen from FIGS. 1 and 3 in particular, the first heat transfer plate 1 and the adjacent second heat transfer plate 2 form a pair of heat transfer plates in the plate package 3. Encloses the first plate gap 5. As can be seen, the plate package 3 has three such pairs of heat transfer plates 1, 2 in the disclosed embodiment. Here, it should be noted that, of course, such a pair of heat transfer plates 1, 2 of the plate heat exchanger may be less or more than three depending on the specific application of the plate heat exchanger. .

  In the disclosed embodiment, each heat transfer plate 1, 2 has two port holes 8, 9 that extend through the plate package 3 and form ports that communicate with the first plate gap 5. . Accordingly, one of the port holes 8, 9 forms a first medium inlet to the plate gap 5, while the other port hole 9 provides a first medium outlet from the first plate gap 5. Forming.

  The heat transfer plates 1 and 2 are configured such that the second plate gap 6 is opened through the peripheral edge side surface 4. Therefore, the second medium freely flows into the second plate gap 6 through the edge side surface 4 of the plate heat exchanger and flows out through the edge side surface 4. Depending on how the plate heat exchanger is positioned relative to the flow of the second medium, the flow direction of the second medium through the plate heat exchanger can be determined.

  Each port hole 8, 9 has a surrounding port area 10, 11. The port region 10 around the first port hole 8 of each heat transfer plate 1, 2 is disposed at a first height p ′ with respect to the extending surface p, and the second heat transfer plate 1, 2 of the second heat transfer plate 1, 2. The second port region 11 around the port hole 9 is arranged at a second height p ″ with respect to the extension plane p. See FIG. 3. In the disclosed embodiment, which port The regions 10 and 11 are also disposed on the same side of the stretched surface p, and the height p ′ is disposed at a position farther from the stretched surface p than the height p ″.

  The plate heat exchanger also has a frame plate 13 and a pressure plate 14 that do not have a heat exchange function. The pressure plate 14 does not have port holes in the disclosed embodiment, while the frame plate 13 has port holes concentric with the port holes 8 and 9, respectively. The connecting pipes 15 and 16 are connected to the frame plate 13 and communicate with each of the aforementioned ports.

  Each first heat transfer plate 1 has two first curved portions 21, and each second heat transfer plate 2 has two second curved portions 22. The first curved portion 21 is composed of the heat transfer plate 1, such that each pair of heat transfer plates 1 and 2 is in a predetermined position relative to each other and this position is maintained throughout the manufacturing process of the plate heat exchanger. Two such pairs of second curved portions 22 are configured to cooperate.

  In the disclosed embodiment, the first curved portion 21 extends in the first direction with respect to the extending surface p of the first heat transfer plate 1, and more precisely extends in the direction away from the extending surface p. Yes. The second curved portion 22 extends in the second direction with respect to the extending surface p of the second heat transfer plate 2, that is, extends in a direction away from the extending surface p. The second direction is a direction opposite to the first direction with respect to the stretched surface p. In the embodiment shown in FIGS. 1 to 5, the first direction is the direction opposite to the pressing direction described above. Therefore, the second curved portion 22 extends in the same direction or substantially the same direction as the compression-molded pattern of the heat transfer plates 1 and 2 and the port regions 10 and 11. The first direction and the second direction extend in the transverse direction or substantially in the transverse direction with respect to the extending surface p. Accordingly, all the heat transfer plates 1 and 2 in the plate package 3 are the same except for the curved portions 21 and 22 extending in opposite directions.

  When installing the plate heat exchanger, every second heat transfer plate 2 is rotated 180 degrees with respect to every first heat transfer plate 1. Therefore, after rotating the second heat transfer plate 2 in this way, the first curved portion 21 and the second curved portion 22 extend in the same direction in the completed plate package 3. See especially FIG. Each of the heat transfer plates 1 and 2 extends along a longitudinal center line x parallel to the extending surface p. The second heat transfer plate 2 is rotated 180 degrees around each center line x in the plate package. FIG. 6 schematically shows a simplified plate package 3 having two pairs of heat transfer plates 1 and 2, in which case the second heat transfer plate 2 is rotated 180 degrees around the center line x. It has been. Therefore, the curved portions 21 and 22 extend in the same direction in the plate package 3.

  As can be seen from FIGS. 1, 2, and 6, the first portions 21 of the respective first heat transfer plates 1 are connected to each other along the respective edges 23 of the first heat transfer plate 1. It is provided to face each other. More precisely, each first curved portion 21 is provided concentrically with the longitudinal center line x such that the longitudinal center line x extends through the center of the first curved portion 21. . Similarly, the second portion 22 of each second heat transfer plate 2 is provided so as to face each other along each edge of the second heat transfer plate 2. More precisely, each second curved portion 22 is provided concentrically with the longitudinal center line x such that the longitudinal center line x extends through the center of the second curved portion 22. .

  Each heat transfer plate has, in the embodiment shown in FIGS. 1 to 5, two short edges 23 facing each other and two long edges 24 facing each other. As can be seen from the figure, the first and second portions 21, 22 are provided on two short edges 23. Of course, it is possible to provide a curved portion along the long edge 24 as another method using two curved portions of each heat transfer plate or as a supplementary method using four curved portions of each heat transfer plate.

  In the disclosed embodiment, each heat transfer plate 1, 2 is adjacent to the short edge 23 and the long edge 24 and around the compressed pattern and port regions 10, 11 of the heat transfer plate 1, 2. It has an extended edge region 25. The edge region 25 is substantially planar and is parallel to the extending surface p. In the disclosed embodiment, the stretch plane p is also located in the edge region 25. As can be seen from FIG. 3, the edge region 25 of the first heat transfer plate 1 is in contact with the edge region 25 of the second heat transfer plate 2 in each pair of the heat transfer plates 1 and 2. .

  Therefore, the plate heat exchanger has the pair of the heat transfer plates 21 and 22 described above. These pairs are located close to each other in the plate package. Therefore, the port hole 8 of the first heat transfer plate 1 of such a pair is such that each pair of the heat transfer plates 1 and 2 is in a predetermined position with respect to the adjacent pair of the heat transfer plates 1 and 2. , 9 are configured to cooperate with the opposed port holes 8, 9 of such a pair of second heat transfer plates 2 adjacent to each other. More specifically, the port region 10 around the first port hole 8 of the first pair of heat transfer plates 1, 2 is the second port of the adjacent second pair of heat transfer plates 1, 2. It is configured to fit into the port region 11 around the hole 9. The port region 11 around the first pair of second port holes 9 is configured to mate with the port region 10 around the second pair of first port holes 8.

  By induction of the heat transfer plates 1, 2 realized by the curved portions 21, 22 and the port areas 10, 11, all parts of the plate package 3, ie at least all the heat transfer plates 1, 2 and possibly the frame plate, 13, the pressure plate 14, and the connecting tubes 15, 16 can also be placed and placed in their final position by means of a suitable brazing material between the parts, after which the plate package 3 is placed in the furnace itself Is brazed in a known manner. It is also conceivable to braze the two heat transfer plates 1 and 2 into the above-mentioned pair in the first step and to braze the pair thus formed in the second step. Joining methods other than brazing, such as welding or gluing, can also be used.

  According to other embodiments, the curved portions 21 and 22 may extend in the same direction away from the stretched surface p. When the plate package 3 is attached and the heat transfer plates are rotated 180 degrees every other sheet, the curved portions 21 and 22 of each pair of heat transfer plates 1 and 2 extend in opposite directions toward each other. To fix the position, the bending portions 21 and 22 can then be displaced from the center line x so as to be adjacent to the center line x. This embodiment has the advantage that all the heat transfer plates 1 and 2 can be made identical. In some cases, position locking can be improved when there are curved portions along each edge 23,24.

  The invention is not limited to the disclosed embodiments, but may be varied and modified within the scope of the claims.

Claims (10)

Extending parallel to the main stretched surface (p) and surrounding peripheral side surface (4), first plate gap (5) for the first medium and second plate gap (6) for the second medium; It possesses a plurality of heat transfer plates provided close to each other to form a plate package (3) to (1,2) having,
Every other heat transfer plate is formed by the first heat transfer plate (1), the remaining heat transfer plates are formed by the second heat transfer plate (2), and the first heat transfer plate (1 ) Form a pair of heat transfer plates (1, 2) surrounding the first plate gap (5) together with the second heat transfer plate (2), and the plate package (3) Having a plurality of pairs of the heat transfer plates (1, 2);
Each of the heat transfer plates has at least two port holes (8, 9) that extend through the plate package (3) and form ports that communicate with the first plate gap (5);
The heat transfer plates (1, 2), a plate heat exchanger that will be configured to the second plate gap (6) is opened through said peripheral edge side surface (4),
Each of the first heat transfer plates (1) has two separate first curved portions (21), and each of the second heat transfer plates (2) has two separate second A curved portion (22) of
The two first curved portions (21) are provided so as to face each other along the respective edges of the first heat transfer plate (1), and the two second curved portions (22) are , Provided to face each other along each edge of the second heat transfer plate (2),
In each pair of heat transfer plates (1, 2), the first curved portion (21) is the first so that the two heat transfer plates (1, 2) of each pair are in a predetermined position with respect to each other. Configured to cooperate with two bends (22) ,
Each port hole (8, 9) of the first heat transfer plate (1) has a predetermined relationship between each pair of heat transfer plates (1, 2) and an adjacent pair of heat transfer plates (1, 2). Configured to cooperate with the facing port holes (8, 9) of the second heat transfer plate (2) to guide it to a position;
Each of the first and second heat transfer plates (1, 2) has a compression molded pattern extending in the pressing direction with respect to the stretched surface (p),
Each of the first curved portions (21) extends in a first direction with respect to the extending surface (p) of the first heat transfer plate (1), and has a curved surface,
Each of the second curved portions (22) extends in a second direction with respect to the extending surface (p) of the second heat transfer plate (2) and has a curved surface, The plate heat exchanger is characterized in that the direction 2 extends in the same direction as the pressing direction and in a direction opposite to the first direction.   2. The plate heat exchanger according to claim 1, wherein the first direction and the second direction extend in a transverse direction with respect to the extending surface (p). 3.   Each second heat transfer plate (2) is rotated 180 degrees with respect to each first heat transfer plate (1) in the finished plate package (3). The plate heat exchanger according to 1 or 2.   The plate according to claim 1 or 3, characterized in that the first curved part (21) and the second curved part (22) extend in the same direction in the finished plate package (3). Heat exchanger.   Each heat transfer plate (1, 2) extends along a longitudinal centerline (x) extending through the curved portion (21, 22). Plate heat exchanger as described in.   6. Each of the second heat transfer plates (2) in the plate package (3) can be rotated 180 degrees around the center line (x) of the heat transfer plate. Plate heat exchanger as described.   The plate heat exchanger according to any one of claims 1 to 6, wherein the first and second heat transfer plates are joined so as not to be detached from each other in the plate package. Each port hole (8, 9) has a surrounding port area (10, 11), and the port area (10) around the first port hole (8) of each heat transfer plate (1, 2) is The port region (11) disposed at a first height (p ′) with respect to the extending surface (p) and around the second port hole (9) of each heat transfer plate (1, 2). ), the characterized in that it is arranged on the extension surface (p) with respect to the second height (p "), plate heat exchanger according to any one of claims 1 to 7. The port region (10) around the first port hole (8) of the first pair of heat transfer plates (1, 2) is adjacent to the adjacent second pair of heat transfer plates (1, 2). 9. A plate heat exchanger according to claim 8 , characterized in that it is configured to fit in the port area (11) around the second port hole (9). The port region (11) around the second port hole (9) of the first pair of heat transfer plates (1, 2) is connected to the adjacent second pair of heat transfer plates (1, 2). 10. A plate heat exchanger according to claim 9 , characterized in that it is adapted to fit into the port area (10) around the first port hole (8) of the same.

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