JP6527412B2 - Plate type heat exchanger - Google Patents

Description

  The present invention relates to a plate heat exchanger provided with a plurality of heat transfer plates.

  BACKGROUND ART Conventionally, a plate type heat exchanger has been provided as a heat exchanger for exchanging heat between a first fluid and a second fluid.

  The plate type heat exchanger is, as shown in FIG. 14, a plurality of heat transfer plates 5... Stacked in one direction, and the first flow path Px for flowing the first fluid X and the second flow Y A plurality of heat transfer plates 5 are provided to separate the two flow paths Py.

  In this type of plate type heat exchanger HE, the first flow paths Px and the second flow paths Py are alternately formed in one direction with the heat transfer plate 5 as a boundary. Thereby, the plate type heat exchanger HE exchanges heat between the first fluid X flowing through the first flow passage Px via the heat transfer plate 5 and the second fluid Y flowing through the second flow passage Py. It has become.

  By the way, in the plate type heat exchanger HE of this type, as the flow path of the first fluid X, the direction conversion flow path Pc formed between the two heat transfer plates 5 and 5 adjacent to each other at an intermediate position in one direction At least one primary flow path Pf extending in one direction and communicating with the direction changing flow path Pc, and one direction extending with respect to the position where the primary flow path Pf communicates with the direction changing flow path Pc. There is one including at least one secondary flow path Ps that communicates with the direction change flow path Pc at different positions in the orthogonal direction and directly or indirectly communicates with the first flow path Px (see, for example, Patent Document 1) ).

  In this type of plate heat exchanger HE, the first fluid X flows from the primary flow path Pf into the direction conversion flow path Pc, and flows in the direction conversion flow path Pc in a direction perpendicular to the flow direction of the primary flow path Pf. Then, it flows out to the secondary flow path Ps. That is, in the plate-type heat exchanger HE of this type, the direction conversion flow path Pc changes the flow direction of the first fluid X from the primary flow path Pf and then flows out to the secondary flow path Ps. ing.

  Thereby, the plate type heat exchanger HE of this type switches the flow path of the first fluid X or the first fluid X according to the purpose of the property of the first fluid X, the improvement of the pressure loss of the first fluid X, etc. The diversion of

JP, 2015-34692, A

  By the way, in the plate type heat exchanger HE of this type, the two heat transfer plates 5 and 5 forming the direction conversion flow path Pc form the direction conversion flow path Pc in order to secure the flowability of the first fluid X. Areas (areas including the positions where the primary flow path Pf and the secondary flow path Ps communicate) are separated from each other. Therefore, when the first fluid X flows in the primary flow path Pf, the secondary flow path Ps, and the direction conversion flow path Pc, the fluid pressure of the first fluid X forms the direction conversion flow path Pc in the heat transfer plate 5 And create a bending action around it. As a result, the joint between the heat transfer plates 5 and 5 and the heat transfer plate 5 themselves are mechanically damaged.

  Therefore, in view of such circumstances, the present invention provides a heat transfer plate that forms the direction changing flow path while securing the flow performance of the first fluid in the direction changing flow path that changes the flow direction of the first fluid. It is an object of the present invention to provide a plate-type heat exchanger capable of reducing mechanical damage to the heat exchanger.

The plate type heat exchanger according to the present invention is a plurality of heat transfer plates stacked in one direction, and a plurality of heat transfer plates that separates a first flow path for flowing the first fluid and a second flow path for flowing the second fluid. The first flow path and the second flow path are alternately formed in one direction bordering the heat transfer plate, and two flow paths adjacent to each other at an intermediate position in one direction as a flow path of the first fluid. A diverting channel formed between the heat transfer plates, at least one primary channel extending in one direction and communicating with the diverting channel, and a primary channel extending in one direction to the diverting channel Plate heat exchange with at least one secondary flow passage communicating with the direction change flow passage at a different position in a direction orthogonal to one direction with respect to the communication position and directly or indirectly communicating with the first flow passage Of the two transfer It is at least one of the plate provided with a partition portion for partitioning on either bets diverting channel space and the first flow path or second flow path between the two heat transfer plates, redirecting Between the position where the primary flow channel communicates with the flow channel and the position where the secondary flow channel communicates with the direction conversion flow channel, the heat transfer plate extends toward the other heat transfer plate to It is characterized in that at least two supporting parts to support are provided, and a channel for communicating the primary flow path side and the secondary flow path side is formed between the two supporting parts.

  According to the above configuration, the first fluid flows in one direction in the primary flow channel and then flows into the direction conversion flow channel, and in a direction orthogonal to the one direction in the direction conversion flow channel (first in the primary flow channel After flowing in the direction perpendicular to the flow direction of the fluid), it flows into the secondary flow path. Therefore, the first fluid reaches the first flow passage through the secondary flow passage, and exchanges heat with the second fluid flowing through the second flow passage while flowing through the first flow passage.

  Thus, when the first fluid flows, the fluid pressure of the first fluid acts on the two heat transfer plates forming the direction change flow path.

  However, in the plate type heat exchanger configured as described above, at least one of the two heat transfer plates (adjacent heat transfer plates) forming the direction change flow path is a primary flow with respect to the direction change flow path. At least two support portions extending toward the other heat transfer plate to support the other heat transfer plate between the position where the path communicates and the position where the secondary flow path communicates with the direction change flow path Therefore, even if the fluid pressure of the first fluid acts on the area forming the direction change flow path in the two heat transfer plates, the areas forming the direction change flow path of the heat transfer plate are through the support portion. Support each other.

As a result, the bending action is less likely to occur in the region forming the direction changing flow path of the heat transfer plate or in the vicinity thereof, and mechanical damage to the two heat transfer plates forming the direction changing flow path is reduced. And since the channel which makes the primary channel side and the secondary channel side connect between two support parts is formed, the smoothness of distribution of the 1st fluid in a direction conversion channel is secured.
Further, with the above configuration, a part of the space between two adjacent heat transfer plates can be used as a flow path (first flow path or second flow path) that can be used for heat exchange, thus improving processing capacity It can be done.

  As one aspect of the present invention, at least one of the two heat transfer plates forming the direction change flow path may be provided with a connection portion connecting the two support portions. In this way, the connection part restrains the two support parts, and tilting of each support part is prevented. Thus, each of the two heat transfer plates forming the direction change flow path reliably supports the other heat transfer plate, and more reliably prevents mechanical damage.

  As described above, according to the present invention, the heat transfer plate forming the direction conversion flow path is formed while securing the flow performance of the first fluid in the direction conversion flow path in which the flow direction of the first fluid is changed. The excellent effect that mechanical damage can be reduced can be achieved.

FIG. 1 is an overall perspective view of a plate-type heat exchanger according to an embodiment of the present invention. FIG. 2 is a schematic exploded perspective view of the plate type heat exchanger according to the same embodiment. FIG. 3 is a schematic cross-sectional view of the plate-type heat exchanger according to the embodiment, and is a schematic cross-sectional view showing the flow paths of the first fluid and the second fluid. FIG. 4 is a schematic perspective view of a heat transfer plate employed in the plate type heat exchanger according to the embodiment. FIG. 5 is a schematic perspective view of a heat transfer plate employed in the plate type heat exchanger according to the same embodiment. FIG. 6 is a partially enlarged view of one heat transfer plate of the two heat transfer plates forming the direction conversion flow passage in the plate type heat exchanger according to the embodiment, and FIG. 6 (b) is a partially enlarged rear view of a second region of the plate body of the heat transfer plate, and FIG. 6 (c) is a partially enlarged front view of the second region of the plate body of the heat transfer plate. It is an II sectional view of Drawing 6 (a). FIG. 7 is a partially enlarged view of the other heat transfer plate of the two heat transfer plates forming the direction conversion flow path in the plate type heat exchanger according to the same embodiment, and FIG. 7 (b) is a partially enlarged rear view of a second region of the plate body of the heat transfer plate, and FIG. 7 (c) is a partially enlarged front view of the second region of the plate body of the heat transfer plate. FIG. 7 is a cross-sectional view taken along the line II-II in FIG. FIG. 8 is a partial enlarged cross-sectional view of the plate type heat exchanger according to the embodiment, and is a partial cross-sectional view including a support portion and a passage. FIG. 9 is an explanatory view of a flow path of the first fluid from the primary flow passage to the secondary flow passage in the plate type heat exchanger according to the embodiment. FIG. 10 is an explanatory view of the flow path of the first fluid in the plate type heat exchanger according to another embodiment of the present invention, and FIG. 10 (a) is a single for the single direction change flow path. FIG. 10 (b) is a schematic view of a flow path in which a plurality of (four) secondary flow paths are connected and a primary flow path is connected, and FIG. It is the schematic of the flow-path path | route which one primary flow path was connected, and one or several secondary flow paths were connected to the single direction conversion flow path. FIG. 11 is a partial enlarged cross-sectional view of a plate-type heat exchanger according to another embodiment of the present invention, which is a partial cross-sectional view including a support and a passage. FIG. 12 is a partially enlarged cross-sectional view of a plate-type heat exchanger according to still another embodiment of the present invention, which is a partial cross-sectional view including a support and a passage. FIG. 13 is a partial enlarged cross-sectional view of a plate-type heat exchanger according to still another embodiment of the present invention, which is a partial cross-sectional view including a support and a passage. FIG. 14 is an explanatory view of a flow path of the first fluid in the conventional plate type heat exchanger.

  Hereinafter, a plate type heat exchanger concerning one embodiment of the present invention is explained, referring to an accompanying drawing.

  The plate type heat exchanger comprises a plurality of heat transfer plates 1... 2 superimposed in one direction as shown in FIG. In the plate type heat exchanger HE, as shown in FIG. 2 and FIG. 3, the first flow path Px for flowing the first fluid X and the second flow path Py for flowing the second fluid Y are the heat transfer plates 1 and 2. Are alternately formed in one direction.

  Here, the flow paths of the plate-type heat exchanger HE, which are connected to the first flow path Px and the second flow path Py, will be specifically described. The plate type heat exchanger HE has a first inflow passage P1a penetrating a plurality of heat transfer plates 1... 2 in one direction and indirectly communicating only with the first flow passage Px, and a plurality of heat transfer plates 1. , 2 ... in one direction and communicate with only the first flow path Px, and a plurality of heat transfer plates 1 ..., 2 ... in one direction and communicate only with the second flow path Py A second inflow passage P2a and a second outflow passage P2b which penetrates the plurality of heat transfer plates 1... 2 in one direction and communicates only with the second flow passage Py.

  Further, the plate type heat exchanger HE, as a flow path of the first fluid X, is formed in one direction with the direction change flow path Pc formed between two heat transfer plates 1 and 2 adjacent to each other at an intermediate position in one direction. At least one primary flow path Pf extending and communicating with the direction changing flow path Pc, and extending in one direction, in a direction orthogonal to one direction with respect to the position where the primary flow path Pf communicates with the direction changing flow path Pc It has at least one secondary flow path Ps in communication with the direction change flow path Pc at different positions and in direct or indirect communication with the first flow path Px.

  The direction changing flow path Pc is provided in at least one place in the middle position in one direction in consideration of the property of the first fluid X, the pressure loss of the first fluid X, and the like. In the present embodiment, the plate-type heat exchanger HE has a plurality of direction change flow paths Pc, as shown in FIG.

  The plurality of direction change flow paths Pc are arranged in one direction at intervals (with the plurality of first flow paths Px and the second flow paths Py interposed). A primary flow path Pf and a secondary flow path Ps provided corresponding to each of the direction conversion flow paths Pc are in communication with each other.

  The plurality of direction change flow paths Pc are fluidly connected. The plate-type heat exchanger HE according to the present embodiment has three direction change flow paths Pc, and the direction change flow path Pc at the central position in one direction is the uppermost flow direction change flow path Pc. The two direction change flow paths Pc are the most downstream direction change flow paths Pc.

  The primary flow path Pf is a flow path connecting the direction conversion flow path Pc to the flow path on the upstream side, and is provided at least one for the single direction conversion flow path Pc to be connected. On the other hand, the secondary flow path Ps is a flow path connecting the direction conversion flow path Pc to the flow path on the downstream side, and at least one is provided for a single direction conversion flow path Pc to be connected. Be

  In the present embodiment, one primary flow path Pf communicates with a single direction change flow path Pc, and two secondary flow paths Ps, Ps communicate with a single direction change flow path Pc. ing.

  More specifically, in the present embodiment, the primary flow path Pf in communication with the most upstream direction conversion flow path Pc is the first inflow path P1a. The secondary flow path Ps connected to the most upstream direction change flow path Pc is different from the primary flow path Pf communicating with the most upstream direction change flow path Pc at different positions in a direction orthogonal to one direction. It extends in the same direction as the path Pf.

  In the present embodiment, two secondary flow paths Ps connected to the most upstream direction change flow path Pc are provided. The two secondary flow paths Ps, Ps are disposed on both sides of the uppermost flow direction conversion flow path Pc. That is, one of the two secondary flow paths Ps and Ps extends from the most upstream direction change flow path Pc toward one side in one direction from the direction change flow path Pc, The other secondary flow path Ps of the two secondary flow paths Ps, Ps extends from the most upstream direction conversion flow path Pc toward the other side in one direction from the direction conversion flow path Pc. That is, the most upstream direction change flow path Pc and the two secondary flow paths Ps and Ps constitute a branch flow path.

  One of the two most downstream flow channels Pc among the three flow channels Pc is located at the center position of the region on one side of the most upstream flow channel Pc in one direction, The other of the two most downstream direction change flow paths Pc among the three direction change flow paths Pc is at the center position of the region on the other side of the most upstream direction change flow path Pc in one direction.

  In the present embodiment, the primary flow path Pf connected to the most downstream direction conversion flow path Pc is the secondary flow path Ps connected to the uppermost flow direction conversion flow path Pc. That is, when a plurality of direction changing flow paths Pc are provided, the secondary flow path Ps connected to the upstream direction changing flow path Pc is taken as the primary flow path Pf connected to the downstream direction changing flow path Pc. Ru.

  The secondary flow path Ps connected to the most downstream direction changing flow path Pc is a primary flow path Pf communicating with the most downstream direction changing flow path Pc (secondary flow path Ps with respect to the upstream direction changing flow path Pc) , And extend in the same direction as the primary flow path Pf at different positions in a direction orthogonal to one direction.

  In the present embodiment, two secondary flow paths Ps connected to the most downstream direction conversion flow path Pc are provided. The two secondary flow paths Ps, Ps are disposed on both sides of the most downstream direction conversion flow path Pc. That is, one secondary flow path Ps of the two secondary flow paths Ps and Ps extends from the most downstream direction conversion flow path Pc toward one side in one direction, and two secondary flow paths Ps, The other secondary flow path Ps of Ps extends from the most downstream direction conversion flow path Pc toward the other side in one direction. Thus, the most downstream direction change flow path Pc and the two secondary flow paths Ps and Ps constitute a branch flow path. In the present embodiment, the ends of the secondary flow paths Ps and Ps in communication with the most downstream direction conversion flow path Pc are in communication with only the first flow path Px.

  As described above, in the plate type heat exchanger HE according to the present embodiment, the flow paths of the first fluid X up to the first flow path Px repeat branching at a plurality of locations and are finally connected to the first flow path Px It is done.

  By the way, as described above, in the plate type heat exchanger HE, the first flow path Px and the second flow path Py are alternately formed with the heat transfer plates 1. And the second fluid Y are exchanged. Then, as described above, assuming that the entire area between the adjacent heat transfer plates 1... 2 is the direction conversion flow path Pc, the first flow path Px or the second flow path Py can not be disposed in this portion, and the heat exchange capacity decreases. There is a risk of causing

  Therefore, in the plate type heat exchanger HE according to the present embodiment, the space between the two heat transfer plates 1 and 2 forming the direction conversion flow path Pc is at least the first flow path Px or the second flow path Py. It divides into the 1st area | region A1 which carries out, and the 2nd area | region A2 made into the direction conversion flow path Pc, and it can use now the space between two heat-transfer plates 1 and 2 to the maximum.

  The flow paths of the plate type heat exchanger HE according to the present embodiment are as described above, and openings are provided at a plurality of locations of the heat transfer plates 1... 2 according to the above flow paths (see FIG. 2) ).

  Specifically, as shown in FIGS. 4 and 5, each of the plurality of heat transfer plates 1,... Has a first surface and a second surface opposite to the first surface. 10, 20, and annular fitting parts 11, 21 projecting from the outer periphery of the plate body 10, 20 to the second surface side of the plate body 10, 20.

  Each of the plate bodies 10, 20 of the plurality of heat transfer plates 1, ..., ... has an opening for forming a flow passage connected to the first flow passage Px and a flow passage connected to the second flow passage Py. Have openings at multiple locations. That is, the plate bodies 10 and 20 of the plurality of heat transfer plates 1 to 2 have openings at a plurality of locations, and the plurality of heat transfer plates 1 to 2 are superimposed in one direction, A single opening at a specific position of the heat transfer plates 1 and 2 or a plurality of openings at specific positions of the plurality of heat transfer plates 1. A flow path connected to the two flow paths Py is formed.

  In addition, since the number and position of the openings provided in the plate bodies 10 and 20 of the heat transfer plates 1 and 2 differ depending on the position where the heat transfer plates 1 and 2 are superimposed (see FIG. 2), The whole of the heat transfer plates 1 and 2 is schematically illustrated, and the area to be an opening (the area to be opened) is shown as an area surrounded by a two-dot chain line depending on the arrangement position. That is, in FIG. 4 and FIG. 5, not all the regions surrounded by the two-dot chain line are openings, and the heat transfer plates 1 and 2 are opened according to the arrangement.

  Each of the plurality of heat transfer plates 1... 2... Is formed in the area forming the first flow path Px and the second flow path Py of the plate body 10 20, and the plurality of concave streaks 12. 23 and so that the ridges 13 and 23 of the heat transfer plates 1 and 2 adjacent to each other cross each other by being superimposed in one direction.

  In the present embodiment, the plate-type heat exchanger HE includes the heat transfer plates 1 and 2 in which the inclination directions of the ridges 13 to 23 of the plate bodies 10 and 20 are different. That is, plate type heat exchanger HE is heat transfer plate 1 (refer to Drawing 4) in which concave streaks 12 ... and convex streaks 13 ... which were inclined toward the both ends from the center of the cross direction to plate body 10 were inclined (refer to Drawing 4) And a heat transfer plate 2 (see FIG. 5) having concave streaks 22 and convex streaks 23 inclined downward from the center in the width direction to both ends with respect to the plate main body 20 (see FIG. 5). By alternately arranging them, the ridges 13 and 23 of the plate bodies 10 and 20 of the adjacent heat transfer plates 1 and 2 are cross-butted (see FIG. 2).

  In the present embodiment, as described above, the space between the two heat transfer plates 1... 2 forming the direction change flow path Pc is divided into the first area A1 and the second area A2. Along with this, as shown in FIGS. 6 (a), 6 (b), 6 (c), 7 (a), 7 (b), and 7 (c), the direction changing flow path Pc is Each of the two heat transfer plates 1 and 2 to be formed is provided with compartments 14 and 24 which can project toward the heat transfer plates 1 and 2 on the other side and can be in close contact with the heat transfer plates 1 and 2. Partitions 14 and 24 are arranged to partition the entire area of at least one of the first surface and the second surface of plate bodies 10 and 20 into regions corresponding to first region A1 and second region A2, respectively. Be done. Along with this, the opening forming the primary flow path Pf and the secondary flow path Ps is the area surrounded by the partitions 14 and 24, and the area corresponding to the second area A2 forming the direction conversion flow path Pc Placed inside. In the present embodiment, the sections 14 and 24 of the two heat transfer plates 1 and 2 forming the direction conversion flow path Pc are in close contact with each other (see FIG. 8). In addition, in FIG. 6A and FIG. 7A, a dot is attached to the area projecting to the front side in the front view, and in FIG. 6B and FIG. 7B, an area projecting to the front side in the rear view The dot is attached.

  The first regions A1 of the plate bodies 10 and 20 in the heat transfer plates 1 and 2 are regions forming the first flow passage Px and the second flow passage Py (a region dividing the first flow passage Px and the second flow passage Py ). That is, the first area A1 is a heat transfer area in which the first fluid X and the second fluid Y exchange heat. Along with this, a plurality of concave streaks 12 ... 22 and convex streaks 13 ... 23 are provided on each of the first surface and the second surface of the first region A1. The heat transfer plates 1 and 2 are formed by pressing a metal plate, and the concave streaks 12 and 22 on the first surface form the convex streaks 13 and 23 on the second surface, and the convex streaks on the first surface Reference numerals 13 and 23 form concave streaks 12 and 22 of the second surface. Then, as described above, the heat transfer plates 1 and 2 in which the inclined directions of the concave streaks 12 and 22 and the convex streaks 13 and 23 are different from each other are alternately stacked, thereby the first heat transfer plates 1 and 2 adjacent to each other. The ridges 13... 23 in the areas A1 and A1 cross each other.

  On the other hand, the second regions A2 of the plate bodies 10 and 20 of the heat transfer plates 1 and 2 do not have the grooves 12... 22 and the ridges 13. The second area A2 is formed in a flat plate shape except for a part (an opening and a part where supporting portions 15 and 25 described later exist). That is, the second regions A2 of the plate bodies 10 and 20 are spaced from the second regions A2 of the plate bodies 10 and 20 in the adjacent heat transfer plates 1. It is formed to face each other.

  In the present embodiment, as described above, the single primary flow path Pf communicates with the single direction conversion flow path Pc, and the pair of secondary flow paths Ps and Ps communicate. Therefore, as shown in FIGS. 6A and 6B, the second region A2 of the heat transfer plate 1 of one of the two heat transfer plates 1 and 2 forming the direction conversion flow path Pc. The opening which forms the primary flow path Pf, and the opening which forms one secondary flow path Ps are provided. On the other hand, in the second region A2 of the other heat transfer plate 2 of the two heat transfer plates 1 and 2 forming the direction conversion flow path Pc, as shown in FIGS. 7A and 7B. As such, only the opening that forms the other secondary flow path Ps is provided.

  In the present embodiment, the opening forming the one secondary flow path Ps provided in the second area A2 of the one heat transfer plate 1 and the other provided in the second area A2 of the other heat transfer plate 2 The openings forming the secondary flow path Ps are arranged (overlapping arrangement) corresponding to each other. Therefore, the position at which each of the two secondary flow paths Ps and Ps communicate with the direction conversion flow path Pc is orthogonal to the direction at which the primary flow path Pf communicates with the direction conversion flow path Pc. It is a position apart by the same distance in the direction of

  In the present embodiment, each of the two heat transfer plates 1 and 2 forming the direction change flow path Pc is shown in FIG. 6 (b), FIG. 6 (c), FIG. 7 (a) and FIG. 7 (c). As shown, between the position at which the primary flow path Pf communicates with the direction conversion flow path Pc and the position at which the secondary flow path Ps communicates with the direction conversion flow path Pc, the heat transfer plates 1 and 2 on the other side At least two support portions 15... 25 extending towards and supporting the heat transfer plates 1, 2 are provided. In the present embodiment, six supporting portions 15 ... are arranged between the position where the primary flow path Pf communicates with the direction changing flow path Pc and the position where the secondary flow path Ps communicates with the direction changing flow path Pc. , 25 ... are provided.

  The at least two support portions 15... 25 are arranged at a position where the primary flow path Pf communicates with the direction conversion flow path Pc and a position where the secondary flow path Ps communicates with the direction conversion flow path Pc. Spaced in the direction orthogonal to the direction. Thereby, the passages 17 and 27 which connect the primary flow passage Pf side and the secondary flow passage Ps side are formed between the two adjacent support portions 15, 15, 25 and 25.

  The supporting portions 15 ..., 25 ... are formed in a piece shape, and the position where the primary flow path Pf communicates with the direction conversion flow path Pc and the position where the secondary flow path Ps communicates with the direction conversion flow path Pc And the direction in which the primary flow path Pf communicates with the direction conversion flow path Pc and the direction in which the secondary flow path Ps communicates with the direction conversion flow path Pc It is set smaller than the size in.

  In the present embodiment, each of the two heat transfer plates 1 and 2 forming the direction conversion flow path Pc is provided with connection portions 16 and 26 for connecting the two support portions 15, 15, 25 and 25. In the present embodiment, the connection parts 16 and 26 connect the tips of the two support parts 15, 15, 25 and 25. Accordingly, the connection portions 16 and 26 are in contact with the heat transfer plates 1 and 2 of the other in a state in which the two heat transfer plates 1 and 2 forming the direction conversion flow path Pc are superimposed in one direction. It is arranged.

  In the present embodiment, the support portions 15 and 25 of the two heat transfer plates 1 and 2 forming the direction conversion flow path Pc are arranged corresponding to each other. Along with this, as shown in FIG. 8, in the state where the two heat transfer plates 1 and 2 forming the direction conversion flow path Pc are superimposed in one direction, the connection parts 16 and 26 contact each other.

  In the present embodiment, as described above, the heat transfer plates 1 and 2 are produced by press forming a metal plate. Along with this, the support parts 15 and 25 and the connection parts 16 and 26 are formed by providing a through hole in a part of the bulging part formed by press molding.

  Specifically, when producing the heat transfer plates 1 and 2 from a metal plate, the metal plate is press-formed, and the first surface side is formed in the area to be the second area A2 of the plate main bodies 10 and 20 by the press-forming. The bulging part (not shown) protruded is formed. The bulging portion is formed in a polygonal shape in a front view. That is, a bulging portion is formed having a peripheral wall portion having a polygonal tubular shape in a front view and a closed portion having a polygonal shape in a front view shape for closing the tip end opening of the peripheral wall portion.

  The peripheral wall portion is formed in a polygonal cylindrical shape, and has a plurality of continuous flat plate portions, and at least one flat plate portion (preferably, two flat plate portions facing each other) of them is a primary flow path Pf and The arrangement is made along the direction corresponding to the direction in which the secondary flow paths Ps are arranged. And the through-hole penetrated in the direction in which the opening which forms the primary flow path Pf with respect to a surrounding wall part, and the opening which forms the secondary flow path Ps are located in a line is formed. For example, in the front view, the through hole is formed in a size that extends not only to the peripheral wall but also to the periphery thereof (a part of the closed part and a part near the base of the peripheral wall). That is, for example, the through hole completely cuts off a part of the peripheral wall by laser cutting, and the edge defining the through hole is at a position where it is out of the boundary between the peripheral wall and the closing part and the base of the peripheral wall Is formed. Thereby, when the fluid pressure of the first fluid X acts, the occurrence of stress concentration in the vicinity of the edge defining the through hole is suppressed.

  As a result, the plate-like support portions 15, 15, 25, 25 are formed on both sides of the through hole, and the connection portions 16, 26 connecting the support portions 15, 15, 25, 25 are formed. That is, while a part of peripheral wall part of a bulging part forms a pair of support parts 15 and 15, a part of closure part of a bulging part a pair of (two) support parts 15, 15, 25, 25 The connection parts 16 and 26 which connected are formed.

  The plurality of heat transfer plates 1... 2 having the above configuration are arranged in a state in which the plate bodies 10 and 20 overlap each other in one direction. In this state, the fitting portions 11 and 21 of the heat transfer plates 1 and 2 adjacent to each other are in close contact with each other. Then, the opening peripheries of the heat transfer plates 1... 2 adjacent to each other are in close contact with each other according to the flow channel configuration such as the primary flow channel Pf and the secondary flow channel Ps. Along with this, in the plate type heat exchanger HE according to the present embodiment, the mutually close portions of the heat transfer plates 1 and 2 adjacent to each other are brazed. As a result, the necessary parts are sealed, and the flow paths Px, Py, P1a, P1b, P2a, P2b, Pf, and Ps are formed. Further, since the ridges 13 and 23 of the plate bodies 10 and 20 of the heat transfer plates 1 and 2 adjacent to each other cross each other, the ridges 13 and 23 are joined at an intersection by brazing.

  In the present embodiment, each of the two heat transfer plates 1 and 2 forming the direction conversion flow path Pc is adjacent to the support portions 15 and 25 that support the heat transfer plates 1 and 2 in the second region A2. Since the connection parts 16 and 26 which connect the support parts 15, 15, 25 and 25 are provided and the connection parts 16 and 26 are in close contact with each other, the connection parts 16 and 26 are joined by brazing. . Thereby, the two heat transfer plates 1 and 2 (second regions A2) forming the direction conversion flow path Pc are restricted in one-way deformation and movement via the support portions 15 and 25.

  Further, in the second regions A2 of the plate main bodies 10 and 20 of the two heat transfer plates 1 and 2 forming the direction conversion flow path Pc, as shown in FIGS. Passages 17 and 27 which connect the primary flow path Pf side and the secondary flow path Ps side are formed between 25. Therefore, when the first fluid X flowing into the direction conversion flow path Pc through the primary flow path Pf flows in the direction orthogonal to one direction in the direction conversion flow path Pc, the space between the support portions 15, 15, 25, 25 Flows into the secondary flow path Ps through the passages 17 and 27 of FIG.

  As described above, the plate-type heat exchanger HE according to the present embodiment is the plurality of heat transfer plates 1... 2 stacked in one direction, and the first flow path Px for passing the first fluid X A plurality of heat transfer plates 1... 2 dividing the second flow path Py for circulating the second fluid Y, and the first flow path Px and the second flow path Py are separated by the heat transfer plates 1 and 2 Alternatingly formed in one direction, as a flow passage of the first fluid X, extending in one direction with a direction change flow passage Pc formed between two heat transfer plates 1 and 2 adjacent to each other at an intermediate position in one direction, At least one primary flow path Pf communicating with the direction changing flow path Pc, and a different position in a direction orthogonal to one direction with respect to the position where the primary flow path Pf communicates with the direction changing flow path Pc. And the first channel Px directly and in communication with the direction change channel Pc. Indirectly and at least one secondary flow path Ps communicated. The two heat transfer plates 1 and 2 forming the direction conversion flow path Pc are the positions where the primary flow path Pf communicates with the direction conversion flow path Pc and the secondary flow path Ps relative to the direction conversion flow path Pc. And at least two support portions 15, 15, 25, 25 which extend toward the heat transfer plates 1, 2 of the other side to support the heat transfer plates 1, 2 of the other side, Passages 17 and 27 are formed between the two support portions 15, 15, 25 and 25 for connecting the primary flow path Pf side and the secondary flow path Ps side.

  Therefore, as shown in FIG. 2 and FIG. 3, the first fluid X flowing in the primary flow path Pf flows in one direction in the primary flow path Pf and then flows in the direction change flow path Pc to change the direction. It flows into the secondary flow path Ps after flowing in the flow path Pc in the direction orthogonal to one direction (the direction perpendicular to the flow direction of the first fluid X in the primary flow path Pf). Therefore, the first fluid X reaches the first flow passage Px through the secondary flow passage Ps, and exchanges heat with the second fluid Y flowing through the second flow passage Py while flowing through the first flow passage Px.

  As described above, when the first fluid X flows, the fluid pressure of the first fluid X acts on the two heat transfer plates 1 and 2 forming the direction change flow path Pc.

  However, in the plate type heat exchanger HE configured as described above, as shown in FIG. 8, each of the two heat transfer plates (adjacent heat transfer plates) 1 and 2 forming the direction change flow path Pc is a direction change flow It extends toward the heat transfer plates 1 and 2 of the other side between the position where the primary flow path Pf communicates with the path Pc and the position where the secondary flow paths Ps, Ps communicate with the direction conversion flow path Pc. Since at least two supporting parts 15... 25 supporting the heat transfer plates 1 and 2 opposite to each other are provided, the first fluid is formed in a region forming the direction change flow path Pc in the two heat transfer plates 1 and 2 Even when the fluid pressure of X acts, the regions forming the direction conversion flow paths Pc of the heat transfer plates 1 and 2 support each other through the support portions 15 and 25.

  As a result, the bending action is less likely to occur in the region forming the direction changing flow path Pc of the heat transfer plates 1 and 2 or in the vicinity thereof, and mechanical to the two heat transfer plates 1 and 2 forming the direction changing flow path Pc. Damage is reduced. And as shown in FIG. 9, since the passages 17 and 27 which connect the primary flow path Pf side and the secondary flow path Ps side are formed between the two support parts 15, 15, 25 and 25, the direction change The smoothness of the flow of the first fluid X in the flow path Pc is ensured.

  Further, since the two heat transfer plates 1 and 2 forming the direction conversion flow path Pc are provided with the connection portions 16 and 26 for connecting the two support portions 15... 25, the two support portions 15. , 25 as a result of the connection portions 16 and 26 being restrained, tilting of the support portions 15 and 25 is suppressed. Thereby, the heat transfer plates 1 and 2 on the other side can be supported more reliably, and the occurrence of mechanical damage to the heat transfer plates 1 and 2 can be suppressed.

  In particular, in the present embodiment, since the support portions 15 and 25 and the connection portions 16 and 26 are formed by providing a through hole in a part of the bulging portion formed by press molding, the support portions 15 and 25 can be obtained. And the rigidity of the connection parts 16 and 26 becomes high, and sufficient reinforcement strength can be obtained.

  Further, when the through hole is provided to the bulging portion, a part of the peripheral wall is completely cut off, and the edge defining the through hole deviates from the boundary between the peripheral wall and the closing portion and the base of the peripheral wall Since the through holes are formed to be positioned, when the fluid pressure of the first fluid X acts, it is possible to suppress the occurrence of stress concentration in the vicinity of the edge defining the through holes.

  Further, at least one of the two heat transfer plates 1... 2 forming the direction conversion flow path Pc is a space between the two heat transfer plates 1. Since the partition parts 14 and 24 which divide into either 1st flow path Px or any one (2nd flow path Py in this embodiment) of 2nd flow path Py, two adjacent heat transfer are carried out. Since a part of the space between the plates 1... 2 can be used as a flow path (the first flow path Px or the second flow path Py) which can be utilized for heat exchange, the heat exchange capacity can be improved.

  Thus, according to the plate type heat exchanger HE according to the present embodiment, the flow performance of the first fluid X in the direction conversion flow path Pc for changing the flow direction of the first fluid X is ensured. The excellent effect that mechanical damage to the heat transfer plates 1 and 2 forming the direction conversion flow path Pc can be reduced can be achieved.

  The present invention is not limited to the above embodiment, and it goes without saying that changes can be made as appropriate without departing from the scope of the present invention.

  For example, in the above embodiment, although the two heat transfer plates 1 and 2 forming the single direction conversion flow path Pc are provided with the compartments 14 and 24 projecting toward the other, both are not limited thereto. . For example, when the heat transfer plates 1 and 2 are provided with the divisions 14 and 24, the divisions 14 and 24 may be provided on either one of the adjacent heat transfer plates 1 and 2. Further, in the above embodiment, the partition portions 14 and 24 are provided in the heat transfer plates 1 and 2 to partition the entire area of the plate main bodies 10 and 20 into the first area A1 and the second area A2. The second region A2 may be defined in the entire plate body 10, 20 without providing the partition portions 14, 24 in the plate bodies 10, 20 of the heat transfer plates 1, 2. Also in this case, the second regions A2 of the heat transfer plates 1 and 2 adjacent to each other are, of course, arranged at intervals (in a non-contact state), and between the openings in the second regions A2 Of course, the support portions 15 and 25 are provided (between the communication position with the primary flow path Pf and the communication position with the secondary flow path Ps).

  In the said embodiment, although the three direction conversion flow paths Pc were provided, it is not limited to this. For example, at least one direction change flow path Pc may be provided.

  Moreover, in the said embodiment, although the one primary flow path Pf and the two secondary flow paths Ps connected with respect to the direction conversion flow path Pc, it is not limited to this. For example, as shown in FIG. 10A, a single primary flow path Pf communicates with a single direction conversion flow path Pc, and three or more (four in FIG. 10A) The secondary flow paths Ps may communicate with each other. Moreover, in the said embodiment, although a pair of secondary flow paths Ps and Ps were provided in the both sides of one direction with respect to the single direction conversion flow path Pc, it is not limited to this. For example, as shown in FIG. 10 (b), two or more secondary flow paths Ps, Ps may be provided on one side of one direction conversion flow path Pc in one direction. Moreover, while the primary flow path Pf is provided in one side of one direction with respect to the direction conversion flow path Pc, the single secondary flow path Ps may be provided in the other side of one direction. In any of these cases, the communication position of the primary flow path Pf to the direction conversion flow path Pc and the communication position of the secondary flow path Ps to the direction conversion flow path Pc are at different positions in the direction orthogonal to one direction. On the premise, if the support portions 15... 25 are provided between these communication positions, the same operation and effect as the above embodiment can be exhibited.

  Moreover, in the said embodiment, although the single primary flow path Pf connected to the single direction conversion flow path Pc, it is not limited to this. For example, two or more primary flow paths Pf may be connected to a single direction change flow path Pc. That is, the present invention is not limited to a system in which a single flow path branches into a plurality of branches, but a system in which a large number of primary flow paths Pf join at a direction change flow path Pc and are collected in a single secondary flow path Ps. Even if it is a system etc. which a single primary channel Pf and a single secondary channel Ps are in communication with the direction change channel Pc and the flow position of the first fluid X is changed. Good. Also in this case, it is assumed that the communication position of the primary flow path Pf with respect to the direction change flow path Pc and the communication position of the secondary flow path Ps with respect to the direction change flow path Pc are different in the direction orthogonal to one direction. In addition, if the support portions 15... 25 are provided between these communication positions, the same operation and effect as the above embodiment can be exhibited.

  In the above embodiment, by forming the through holes in the bulging portion formed by press molding, part of the bulging portion is used as the supporting portions 15, 25, and the connecting portions 16 and 26, but the present invention is not limited thereto. . For example, the plate bodies 10 and 20 may be connected to one another such as supporting members 15 to 25 and so on, or part of the plate bodies 10 and 20 may be cut and raised to form the supporting portions 15 to 25. .

  In the said embodiment, although the support parts 15 and 25 were provided in each of the two heat-transfer plates 1 and 2 which form the direction conversion flow path Pc, it is not limited to this. For example, as shown in FIG. 11 and FIG. 12, the support portions 15 and 25 may be provided on any one of the two heat transfer plates 1 and 2 forming the direction conversion flow path Pc.

  In the said embodiment, although the connection parts 16 and 26 which connected support part 15 ..., 25 ... were provided, it is not limited to this. For example, as shown in FIG. 13, only the support portions 15... 25 provided in the form of strips are provided on the plate body 10 20 and the tips of the support portions 15. You may do it.

  1, 2 ... Heat transfer plate, 10, 20 ... Plate main body, 11, 21 ... Fitting portion, 12, 22 ... Concave line, 13, 23 ... Convex line, 14, 24 ... Division part, 15, 25 ... Support part 16, 26, connection portion 17, 27, 27 passage, A1 first region, A2 second region, HE plate heat exchanger P1a first inflow passage P1b first outflow passage P2a second Second inflow path, P2b: second outflow path, Pc: direction conversion flow path, Pf: primary flow path, Ps: secondary flow path, Px: first flow path, Py: second flow path, X: first fluid, Y: second fluid

Claims (2)

A plurality of heat transfer plates stacked in one direction, the plurality of heat transfer plates separating a first flow path for flowing the first fluid and a second flow path for flowing the second fluid; A second flow passage is alternately formed in one direction bordering the heat transfer plate, and a direction change flow formed between two adjacent heat transfer plates at an intermediate position in one direction as a flow passage of the first fluid A channel, at least one primary channel extending in one direction and communicating with the diverting channel, and extending in one direction and orthogonal to the one direction where the primary channel communicates with the diverting channel In the plate type heat exchanger having at least one secondary flow passage communicating with the direction changing flow passage at different positions in the direction and directly or indirectly communicating with the first flow passage, two forming the direction changing flow passage At least one of the heat transfer plates Write is provided with a partition portion for partitioning on either bets space redirecting flow path and the first flow path or second flow path between the two heat transfer plates, the primary current to the direction changing passage At least two support portions extending toward the other heat transfer plate to support the other heat transfer plate between the position where the path communicates and the position where the secondary flow path communicates with the direction change flow path A plate-type heat exchanger characterized in that a passage for communicating the primary flow passage side with the secondary flow passage side is formed between the two support portions. The plate type heat exchanger according to claim 1, wherein at least one of the two heat transfer plates forming the direction changing flow path includes a connection portion connecting the two support portions.