RU2435123C2 - Plate-type heat exchanger - Google Patents

Abstract

FIELD: heating. ^ SUBSTANCE: plate-type heat exchanger includes multiple first and second heat exchange plates located near each other for formation of pack of plates, which has enveloping end side and the first gaps between plates for the first medium and the second gaps between plates for the second medium. The first heat exchange plate forms together with the second heat exchange plate a pair of heat exchange plates. Pack of plates includes a lot of such pairs. Each heat exchange plate has two holes which form passages passing through pack of plates and interconnected with the first gaps between plates. The second gaps between plates are open through the enveloping end side. Every first heat exchange plate includes the first bent part that interacts with bent part of the second heat exchange plate in order to ensure that those two heat exchange plates will occupy the specified position relative to each other. Each hole of the first heat exchange plate interacts with the corresponding hole of the second heat exchange plate to ensure that each pair will occupy the specified position relative to adjacent pairs. ^ EFFECT: simpler erection of heat exchanger at providing the accuracy of plates attachment. ^ 14 cl, 6 dwg

Description

FIELD OF THE INVENTION

The present invention relates to a plate heat exchanger containing a plurality of heat exchange plates corresponding to the preamble of claim 1. Such plate heat exchangers can be used in various fields, for example, in the passage for the gaseous products of combustion of incinerators, to extract thermal energy from the gaseous products of combustion.

BACKGROUND OF THE INVENTION AND DESCRIPTION OF THE PRIOR ART

In plate heat exchangers of the aforementioned type, which are open outward to the side of the surrounding edge and which do not have any downward bent flange along the edge of each heat transfer plate, it is difficult to direct the heat transfer plates in connection with the installation of the plate package. Therefore, it is difficult to ensure the correct position for each individual heat exchanger plate relative to other heat exchanger plates when the stack of plates is mounted, and during the attachment of the heat exchange plates to each other, for example, during subsequent brazing of the plate stack. The direction of the location of the heat transfer plates with existing techniques requires the use of external guide elements of various types.

US patent No. 5918664 describes a plate heat exchanger of the above type, which contains many heat transfer plates. Each of the heat exchanger plates runs parallel to the baseline extent plane. The heat exchange plates are located next to each other so that they form a package of plates having a surrounding edge side and first spaces between the plates for the first medium and second spaces between the plates for the second medium.

Each second heat exchanger plate is formed by the first of said heat exchanger plates, and the remaining heat exchanger plates are formed by a second heat exchanger plate such that such a first heat exchanger plate together with such a second heat exchanger plate form a pair of heat exchanger plates that span such a first gap between the plates, and the plate package contains many such pairs of heat transfer plates. Each of the heat exchanger plates has at least two passage-forming holes extending through the packet of plates and communicating with the first spaces between the plates. The heat transfer plates are configured so that the second spaces between the plates are open through the surrounding edge side.

US patent No. 5967227 describes another type of plate heat exchanger containing a plurality of heat exchange plates, each of which runs parallel to the main plane of extension. The heat transfer plates are arranged next to each other in alternating order to form a stack of plates. Heat transfer plates form the first spaces between the plates for the first medium and the second spaces between the plates for the second medium. The first and second spaces between the plates are sealed with surrounding gaskets. Each of the heat exchanger plates has two holes that form the passages passing through the package of plates and communicating with the first gaps between the plates, and two holes that form the passages passing through the package of plates and communicating with the first gaps between the plates. Each heat transfer plate contains a bent portion in each corner that interacts with a corresponding bent portion of adjacent heat transfer plates in the plate stack.

SUMMARY OF THE INVENTION

The present invention is to eliminate the above problems and facilitate the direction and location of the heat transfer plates in connection with the installation and connection of the package of plates.

This problem is achieved thanks to the plate heat exchanger of the type indicated above, which is characterized in that each of the openings of such a first heat-exchange plate is made in such a way that it interacts with the opposite opening of such a second heat-exchange plate to ensure that each pair of heat-exchange plates occupies a predetermined position relative to adjacent pairs of heat transfer plates.

Thanks to two such bent parts interacting with each other, when the first heat transfer plate is laid on the second heat transfer plate, it can be ensured that the two heat transfer plates will be guided to the correct position and that this position will be maintained throughout the installation and connection of the package of plates and plate heat exchanger. When two heat exchanger plates are attached to each other, two curved parts can prevent their movement or rotation relative to each other in a plane parallel to the plane of extension. In addition, the correct arrangement of different pairs relative to each other is facilitated by the fact that the holes are designed to interact with the corresponding hole of an adjacent pair in a plate package. The holes will thus contribute to the direction of the pairs of heat exchanger plates to a predetermined position relative to each other and the maintenance of this position of the pairs of heat exchanger plates during the entire production process.

According to an embodiment of the invention, each first and second heat exchange plate has a pressure-molded structure that projects in the pressing direction with respect to the extension plane, in which the first bent portion extends in the first direction relative to the extension plane of the first heat exchange plate, and the second bent portion extends in the second direction relative to the length plane of the second heat exchange plate and in which the second direction extends along the press line but in the direction opposite to the first direction. Since the bent parts extend in different directions with respect to the plane of extension and with respect to the heat exchange structure and the regions of the openings of the compression molded plate, the bent parts are preferably produced by a molding operation after the main molding of the structure and the regions of the plate openings. The first direction and the second direction can then extend across or substantially across the plane of extension. In addition, each second heat transfer plate can be rotated 180 ° relative to each first heat transfer plate in an assembled package of plates. Thus, the first bent part and the second bent part will pass in the same direction in the assembled package of plates, which ensures proper conformity of the forms and proper mating of the forms between the first and second bent parts and, thus, between the first and second heat exchange plates in each pair .

According to another embodiment of the invention, each heat exchanger plate extends along a longitudinal center line that extends through the bent portion. In addition, every second heat transfer plate in the plate stack can be rotated 180 ° around the center line of the heat transfer plate.

According to another embodiment of the invention, the first and second heat exchange plates are permanently connected to each other in a plate stack. Such a permanently connected plate package can be obtained by brazing, gluing or welding.

According to another embodiment of the invention, each first heat exchanger plate comprises two first curved parts, and each second heat exchanger plate contains two second curved parts. Two such bent parts of each heat transfer plate are sufficient to provide the above arrangement of the heat transfer plates relative to each other.

According to another embodiment of the invention, the two first bent parts are located opposite each other along the corresponding edge of the first heat transfer plate, and the two second bent parts are located against each other along the corresponding edge of the second heat transfer plate.

According to another embodiment of the invention, each opening comprises a region surrounding the opening in which a region surrounding the opening around the first opening of each heat exchanger plate is located at a first level with respect to the extension plane, and an opening region around the second of said openings of each heat exchanger plate is located at a different level with respect to the extension plane. Preferably, the region surrounding the hole around the first hole of the first pair of heat exchanger plates can be configured to interact with the region surrounding the hole around the second hole of an adjacent second pair of heat exchanger plates. The area surrounding the hole around the second hole of the first pair of heat exchanger plates can then be made so that it interacts with the surrounding area of the hole around the first hole of the adjacent second pair of heat transfer plates. Thus, the holes can facilitate the direction of the pairs of heat transfer plates in a predetermined position relative to each other and the maintenance of this position of the pairs of heat transfer plates during the entire production process.

Brief Description of the Drawings

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

Figure 1 is a perspective view with a spatial separation of the parts of the plate heat exchanger according to a variant embodiment of the invention.

Figure 2 is a top view of the plate heat exchanger shown in figure 1.

Figure 3 is a sectional view of a plate heat exchanger made along the line III-III in figure 2.

Figure 4 is a sectional view of a plate heat exchanger made along the line IV-IV in figure 2.

5 is a more detailed view of a portion of the edge region V of the plate heat exchanger.

6 is a simplified perspective view with a spatial separation of the parts of the package of heat transfer plates according to the invention.

Detailed Description of Various Embodiments

With reference to FIGS. 1-5, an embodiment of a plate heat exchanger is described. The plate heat exchanger comprises a plurality of heat exchange plates 1, 2. The heat exchange plates 1, 2 consist of the first heat exchange plates 1 and the second heat exchange plates 2. All the heat exchange plates 1, 2 perform the function of heat transfer in the plate heat exchanger. Each heat exchange plate 1, 2 runs parallel to the main length plane p, see FIG. 3. The extension plane p can be considered as extending in the parallel plane of each heat transfer plate 1, 2 and parallel to it, and from which each heat transfer plate 1, 2 is made by injection molding in a known manner to obtain a molded structure (mold) including a heat transfer structure ( shape) with corrugations and the structure (shape) of the passage area.

The heat exchange plates 1, 2 are located next to each other so that they form a package of 3 plates having an edge side 4 that extends around the package 3 of plates. The heat exchange plates 1, 2 form in the stack of plates 3 the first spaces 5 between the plates for the first medium and the second spaces 6 between the plates for the second medium, see FIG. 3. The heat exchange plates 1, 2 are also arranged in such a way in the plate stack 3 that each second heat exchange plate is a first heat exchange plate 1, and the remaining heat exchange plates are a second heat exchange plate 2. As can be seen, in particular in FIGS. 1 and 3, the first heat exchanger plate 1 and the adjacent second heat exchanger plate 2 form a pair of heat exchanger plates in the stack of plates 3 so that this pair of heat exchanger plates defines a first intermediate space 5 between the plates us. As you can see, the package of plates 3 contains, in the described embodiment, three such pairs of heat exchanger plates 1, 2. Here it should be noted that the plate heat exchanger, of course, may contain fewer or more such pairs of heat exchange plates 1, 2, depending on the particular application plate heat exchanger.

In the described embodiment, each heat exchanger plate 1, 2 has two openings 8, 9, which form passages passing through the stack of plates 3, and communicate with the first spaces 5 between the plates. One of the holes 8, 9 thus forms an inlet passage for the first medium into the first space 5 between the plates, while the other hole 9 forms an outlet passage for the first medium from the first space 5 between the plates.

The heat exchanger plates 1, 2 are designed so that the second spaces 6 between the plates are open through the surrounding edge side 4. The second medium can thus flow freely through the edge side 4 of the plate heat exchanger into the second spaces 6 between the plates and out through the edge side 4. Depending on how the plate heat exchanger is located relative to the flow of the second medium, the direction of flow of the second medium through the plate heat exchanger can be set.

Each hole 8, 9 contains a surrounding region 10, 11. The region surrounding the hole 10 around the first hole 8 of each heat exchanger plate 1, 2 is located at a first level p 'relative to the extension plane p, and the second region surrounding the hole region 11 around the second hole 9 of each heat exchanger plate 1, 2 is located at the second level p "relative to the length plane p, see Fig. 3. In the described embodiment of the invention, the two surrounding regions 10, 11 are located on one side of the length plane p, and this level p 'is located farther from the plane p of extension than the level p ".

The plate heat exchanger also includes a frame plate 13 and a pressure plate 14, which do not perform any heat transfer functions. The pressure plate 14 does not have holes in the described embodiments, while the frame plate 13 has holes concentric with the holes 8 and 9, respectively. Connecting pipes 15 and 16 are connected to the frame plate 13 to ensure communication with the corresponding one of the above passages.

Each first heat exchanger plate 1 contains two first curved parts 21, and every second heat exchanger plate 2 contains two second curved parts 22. The first curved part 21 is arranged to interact with the second curved part 22 of each such pair of heat exchanger plates 1, 2 to ensure that the heat exchange plates 1 and 2 in each pair will occupy a predetermined position relative to each other and that this position will be maintained during the entire manufacturing process of the plate heat exchanger.

In the described embodiment, the first curved portions 21 extend in a first direction relative to the length plane p of the first heat exchanger plate 1 and, more specifically, the length plane p. The second curved portion 22 extends in a second direction relative to the extension plane p of the second heat exchange plate 2, i.e., from the extension plane p. The second direction is opposite to the first direction relative to the length plane p. In the embodiment of the invention shown in figures 1-5, the first direction is opposite to the above direction of pressing. The second bent portion 22 thus extends in the same direction or substantially the same direction as the pressure-formed structures and regions 10, 11 of the openings of the heat exchanger plates 1, 2. The first direction and the second direction extend transversely or substantially transversely the p-length plane. All heat transfer plates 1, 2 in the package 3 plates, thus, are identical, except for the bent parts 21, 22, passing in opposite directions.

When the plate heat exchanger is mounted, each second heat exchanger plate 2 is rotated 180 ° relative to each first heat exchanger plate 1. After this rotation of the second heat exchanger plates 2, the first curved part 21 and the second curved part 22 will thus extend in the same direction in the assembled bag 3 plates, see, in particular, figure 5. Each heat transfer plate 1, 2 extends along a longitudinal center line x that is parallel to the length plane p. The second heat exchanger plates 2 are located in a plate package rotated 180 ° around the corresponding center line x. 6 schematically and simplistically shows a package of 3 plates having two pairs of heat transfer plates 1, 2, when the second heat transfer plates 2 are rotated 180 ° around the center line x. The bent parts 21, 22 thus extend in the same direction in the stack of 3 plates.

As can be seen in FIGS. 1, 2 and 6, the first parts 21 of each first heat transfer plate 1 are located opposite each other along the corresponding edge 23 of the first heat transfer plate 1. More precisely, each first curved part 21 is arranged concentrically with respect to the longitudinal center line x in this way so that the center line x passes in the center through the first bent portion 21. In the same way, the second parts 22 of each second heat transfer plate 2 are located opposite each other along the corresponding edge of the second heat transfer layer 2. 2. More precisely, every second curved part 22 is arranged concentrically with respect to the longitudinal center line x so that the central line x passes through the center of the second curved part 22.

Each heat transfer plate has, in the embodiment of the invention shown in FIGS. 1-5, two opposite short edges 23 and two opposite long edges 24. As you can see, the first and second parts 21, 22 are located on two short edges 23. Of course, you can as an alternative to two curved parts of each heat exchanger plate or four curved parts of each heat exchanger plate, perform curved parts along the long edges 24.

In the described embodiment, each heat exchanger plate 1, 2 has an edge region 25 adjacent to the short and long edges 23, 24 and extending around the injection molded structure and the hole regions 10, 11 of the heat exchanger plates 1, 2. The edge region 25 is essentially flat and parallel to the length plane p. In the described embodiment, the extension plane p is also in the edge region 25. As can be seen in FIG. 3, the edge region 25 of the first heat exchange plate 1 is adjacent in each pair of heat exchange plates 1, 2 to the edge region 25 of the second heat exchange plate 2.

The plate heat exchanger thus comprises the above pairs of heat exchanger plates 1, 2. These pairs are located next to each other in a plate package. Each of the holes 8, 9 of the first heat exchanger plate 1 of such a pair is thus configured to interact with the opposite hole 8, 9 of the second heat exchanger plate 2 of such an adjacent pair to ensure that each pair of heat exchanger plates 1, 2 occupies a predetermined position relatively adjacent pairs of heat transfer plates 1, 2. More specifically, the hole region 10 around the first hole 8 of the first pair of heat transfer plates 1, 2 is configured so that it interacts with the hole region 11 around the second hole 9 of the adjacent second pair of heat exchanger plates 1, 2. The hole region 11 around the second hole 9 of the first pair in this case is made so that it interacts with the hole region 10 around the first hole 8 of the second pair.

Due to the direction of the heat exchange plates 1, 2, achieved due to the bent parts 21, 22 and the regions 10, 11 of the holes, all parts of the package 3 plates, that is, at least all the heat transfer plates 1, 2 and, possibly, also the frame plate 13, the pressure plate 14 and the connecting pipes 15, 16 can be installed and located in their final position with a suitable material of solder between the parts, after which the package of 3 plates is placed in a furnace and soldered in a substantially known manner. You can also provide for the soldering during the first stage of the two heat transfer plates 1, 2 to the above pairs and during the second stage, the soldering of the thus formed pairs. Other bonding methods other than brazing, such as welding or gluing, may also be used.

According to another alternative embodiment of the invention, the curved parts 21 and 22 can extend in the same direction from the length plane p. When the package of 3 plates is mounted, with each second heat transfer plate being rotated 180 °, the bent parts 21, 22 of the heat transfer plates 1, 2 in each pair will pass in opposite directions to each other. In order to achieve a fixed position, the curved portions 21, 22 can then be offset from the center line x so that they are adjacent to the center line x. These embodiments of the invention have the advantage that all heat transfer plates 1, 2 can be made completely identical. Perhaps the position fixation can be improved by having bent parts along each edge 23, 24.

The invention is not limited to the described embodiments of the invention, but may be modified and modified within the framework of the following claims.

Claims (14)

1. A plate heat exchanger containing a plurality of heat exchange plates (1, 2), each of which runs parallel to the main plane (p) of extension, and which are located next to each other so that they form a package (3) of plates, having a surrounding edge side (4) and the first gaps (5) between the plates for the first medium and the second gaps (6) between the plates for the second medium,
moreover, each second heat transfer plate is formed by the first heat transfer plate (1), and the remaining heat transfer plates are formed by the second heat transfer plate (2) so that such a first heat transfer plate (1) together with such a second heat transfer plate (2) form a pair of heat transfer plates (1) , 2), which cover such a first gap (5) between the plates, while the package (3) of plates contains many such pairs of heat transfer plates (1, 2),
moreover, each of the heat transfer plates has at least two openings (8, 9) that form passages passing through the packet (3) of plates and communicate with the first gaps (5) between the plates, moreover, the heat transfer plates (1, 2) made in such a way that the second spaces (6) between the plates are open through the surrounding edge side (4), and each first such heat transfer plate (1) contains at least the first bent part (21), and every second such heat transfer plate ( 2) contains at least a second curved hour t (22), and in each pair of heat exchanger plates (1, 2), the first bent part (21) is located so that it interacts with the second bent part (22) to ensure that two heat exchanger plates (1, 2) in each the pair occupy a predetermined position relative to each other, characterized in that each of the holes (8, 9) of such a first heat exchange plate (1) is made in such a way that it interacts with the opposite hole (8, 9) of such a second heat transfer plate (2) for ensuring that each pair of heat exchanger plates (1,2) occupies a predetermined position relative to adjacent pairs of heat transfer plates (1,2). 2. A plate heat exchanger according to claim 1, characterized in that each first and second heat exchanger plate (1, 2) has a structure obtained by injection molding, which protrudes in the direction of pressing relative to the length plane (p), the first bent part (21) passes in the first direction relative to the plane (p) of the length of the first heat exchange plate (1), and the second bent part (22) passes in the second direction relative to the plane (p) of the length of the second heat exchange plate (2), while the second board extends in the same direction as the pressing direction but is opposite to the first direction. 3. The plate heat exchanger according to claim 2, characterized in that the first direction and the second direction extend across the length plane (p). 4. The plate heat exchanger according to claim 2, characterized in that every second heat exchange plate (2) is rotated 180 ° relative to each first heat exchange plate (1) in a folded package (3) of plates. 5. The plate heat exchanger according to claim 3, characterized in that every second heat exchange plate (2) is rotated 180 ° relative to each first heat exchange plate (1) in a folded package (3) of plates. 6. A plate heat exchanger according to any one of claims 2 to 4, characterized in that the first curved part (21) and the second curved part (22) extend in the same direction in the folded package (3) of the plates. 7. A plate heat exchanger according to any one of claims 1 and 2, characterized in that each heat exchanger plate (1,2) passes along a longitudinal center line (x) that passes through the bent portion (21, 22). 8. The plate heat exchanger according to claim 7, characterized in that every second heat exchanger plate (2) in the plate package (3) is rotated 180 ° around the center line (x) of the heat exchanger plate. 9. The plate heat exchanger according to any one of claims 1 and 2, characterized in that the first and second heat exchanger plates are constantly connected to each other in a plate package. 10. A plate heat exchanger according to any one of claims 1 and 2, characterized in that each first heat exchanger plate (1) contains two first curved parts (21), and every second heat exchanger plate (2) contains two second curved parts (22). 11. A plate heat exchanger according to claim 10, characterized in that the two first bent parts (21) are located opposite each other along the corresponding edge of the first heat exchanger plate (1), and that the two second bent parts (22) are located opposite each other along the corresponding edge second heat transfer plate (2). 12. A plate heat exchanger according to any one of claims 1 and 2, characterized in that each hole (8, 9) comprises a region (10, 11) surrounding the hole, and a region (10) around the first hole (8) of each heat exchanger plate (1 , 2) is located at the first level (p ') relative to the extent plane (p), and the region (11) around the second of the indicated holes (9) of each heat exchange plate (1, 2) is located at the second level (p ") relative to the plane ( p) extent. 13. A plate heat exchanger according to claim 12, characterized in that the region (10) around the first hole (8) of the first pair of heat exchanger plates (1, 2) is made in such a way that it interacts with the region (11) around the second hole (9) adjacent second pair of heat transfer plates (1, 2). 14. The plate heat exchanger according to claim 13, characterized in that the region (11) around the second hole (9) of the first pair of heat exchange plates (1, 2) is made in such a way that it interacts with the region (10) around the first hole (8) a second adjacent pair of heat exchange plates (1,2).

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