JP5818396B2 - Plate heat exchanger - Google Patents

Description

Cross-reference of related applications

  This application claims the priority of Japanese Patent Application No. 2013-74892, and the content of Japanese Patent Application No. 2013-74892 is incorporated in the description of the present specification by reference.

  The present invention relates to a plate heat exchanger used as an evaporator and a condenser.

  Conventionally, a plate heat exchanger has an evaporator that evaporates the first fluid in association with heat exchange between the first fluid and the second fluid, and a first in association with heat exchange between the first fluid and the second fluid. It is widely used as a heat exchanger used in a condenser that condenses fluid (for example, see Patent Document 1).

  In general, the plate heat exchanger includes a main body 3 including a plurality of heat transfer plates 2, as shown in FIG. The main body 3 includes a first flow path 30, a second flow path 31, a pair of first series passages 32 and 33, and a pair of second communication paths 34 and 35. The first flow path 30 allows the first fluid A to flow. The second flow path 31 circulates the second fluid B. The pair of first series passages 32 and 33 communicate with the first flow path 30 and allow the first fluid A to flow into and out of the first flow path 30. The pair of second communication passages 34 and 35 communicate with the second flow path 31 and allow the second fluid B to flow into and out of the second flow path 31.

  This will be described more specifically. The plurality of heat transfer plates 2, ... each have at least four openings (not numbered). And in the main-body part 3, several heat-transfer plate 2, ... is laminated | stacked. Thereby, the 1st flow path 30 which distribute | circulates the 1st fluid A and the 2nd flow path 31 which distribute | circulates the 2nd fluid B are alternately formed by using the heat-transfer plates 2 ... as a boundary. Further, by stacking the plurality of heat transfer plates 2,..., The openings formed in the heat transfer plate 2 are continuous in the stacking direction of the plurality of heat transfer plates 2. Accordingly, one first series passage 32 that allows the first fluid A to flow into the first flow path 30, the other second series path 33 that causes the first fluid A to flow out from the first flow path 30, and the second flow path 31. One second communication passage 34 for allowing the second fluid B to flow into the second fluid passage B and the other second communication passage 35 for allowing the second fluid B to flow out from the second flow passage 31 pass through the heat transfer plates 2,. It extends in the stacking direction of the plurality of heat transfer plates 2 (see, for example, Patent Document 1).

  In this type of plate heat exchanger 1, the first fluid A supplied to one of the first series passages 32 flows out through the first flow path 30 to the other first series passage 33. Further, the second fluid B supplied to one second communication passage 34 flows out to the other second communication passage 35 through the second flow path 31. In the plate heat exchanger 1, the first fluid A flows through the first flow path 30 and the second fluid B flows through the second flow path 31 as described above. As a result, the plate heat exchanger 1 exchanges heat between the first fluid A and the second fluid B via the wide heat transfer surface of the heat transfer plate 2 that partitions the first flow path 30 and the second flow path 31. Let

  By the way, in this kind of plate-type heat exchanger 1, when the number of laminated heat transfer plates 2,... Increases, the heat transfer area contributing to heat exchange increases and the heat exchange performance increases.

  However, when the number of heat transfer plates 2,... Increases, the length of the first series passages 32, 33 and the second communication passages 34, 35 extending in the stacking direction of the heat transfer plates 2,. It becomes longer according to the number of plates 2.

  That is, each of the pair of first series passages 32, 33 and the pair of second communication paths 34, 35 is formed by the openings of the heat transfer plates 2,. The flow path lengths of the 33 and the pair of second communication passages 34 and 35 become longer as the number of the heat transfer plates 2.

  As a result, the flow resistance of the first fluid A in the first series passage (one first series passage) 32 through which the first fluid A flows into the first flow path 30 increases, and the first fluid A becomes difficult to flow. . Therefore, in this type of plate heat exchanger 1, the inflow amount of the first fluid A to the first flow path 30 on the inlet side of one first series passage 32 and the back side of one first series path 32. The amount of the first fluid A flowing into the first flow path 30 is not uniform. That is, in this type of plate heat exchanger 1, uneven distribution of the first fluid A occurs with respect to the plurality of first flow paths 30 arranged in the stacking direction of the heat transfer plates 2. As a result, in this type of plate heat exchanger 1, the heat exchange performance (evaporation performance) is improved even if the number of the heat transfer plates 2,. There is a limit.

Japanese Unexamined Patent Publication No. 11-287572

  Accordingly, the present invention provides a plate heat exchanger that can uniformly supply the first fluid to the plurality of first flow paths while suppressing an increase in pressure loss in the plurality of first flow paths through which the first fluid flows. The issue is to provide.

  The plate heat exchanger according to the present invention includes a main body portion including a plurality of stacked heat transfer plates, and the main body portion includes a plurality of first flow paths through which the first fluid flows and a plurality of the second fluid through which the second fluid flows. And a pair of first passages communicating with the first passage, a pair of first passages allowing the first fluid to flow into and out of the first passage, and a pair communicating with the second passage. And a pair of second communication passages for allowing the second fluid to flow into and out of the second flow path, and the first flow path and the second flow path are alternately arranged with the heat transfer plate as a boundary. Each of the first series passage and the second communication passage extends through the heat transfer plate in the stacking direction of the heat transfer plates, and the first flow paths are: A heat transfer plate that communicates with each other to form a flow path of a first fluid from one first series passage to the other first series passage. At least one first flow path in the central region in the stacking direction is a reference flow path that is a branch position of the flow path of the first fluid, and the main body portion is a reference flow path in the stacking direction of the reference flow path and the heat transfer plate. And having at least a pair of primary branch passages that communicate with at least one first flow path on each of the one end side and the other end side, wherein one of the first series passages communicates only with the reference flow path, The first series passage is a first passage on one end side and the other end side of the reference passage in the stacking direction of the heat transfer plates, and communicates only with the first passage serving as the end of the first fluid passage. The first fluid flow path starting from one primary branch path on one end side in the stacking direction of the heat transfer plate and the first primary branch path starting from the other primary branch path on the other end side in the stacking direction of the heat transfer plate The fluid flow path is formed symmetrically with respect to the reference flow path. And wherein the are.

  As one aspect of the present invention, three or more first flow paths are provided on each of one end side and the other end side of the reference flow path in the stacking direction of the heat transfer plates, and more than the reference flow path in the stacking direction of the heat transfer plates. In each of the one end side and the other end side, an intermediate reference flow in which the first flow path in the central region in the stacking direction of the heat transfer plates among the three or more first flow paths is the branch position of the flow path of the first fluid. The main body portion is a pair of two channels that communicate between the intermediate reference channel and at least one first channel on each of one end side and the other end side of the intermediate reference channel in the stacking direction of the heat transfer plates. Each of the primary branch paths communicates with an intermediate reference flow path on one end side and the other end side of the reference flow path in the stacking direction of the heat transfer plates, and the stacking direction of the heat transfer plates One end than the reference flow path in The flow of the first fluid starting from one secondary branch of the first fluid flow path and the other secondary branch of the other end of the reference flow path in the stacking direction of the heat transfer plates The path may be formed symmetrically with respect to the intermediate reference channel.

  In this case, the first flow path is located on one end side and the other end side of the intermediate reference flow path in the stacking direction of the heat transfer plates on each of the one end side and the other end side of the reference flow path in the heat transfer plate stacking direction. Two or more and the same number are provided for each, and the main body portion is located on the one end side and the other end side from the reference flow path in the stacking direction of the heat transfer plates, and from the intermediate reference flow path in the heat transfer plate stacking direction. Also, a connection path that connects two or more first flow paths on one end side, and a connection that connects two or more first flow paths on the other end side of the intermediate reference flow path in the stacking direction of the heat transfer plates At least one first flow path on one end side and the other end side of the intermediate reference flow path in the stacking direction of the heat transfer plates, and at least one end of the flow path of the first fluid One second Passage may be in communication with the other of the first communication passage.

  As another embodiment of the present invention, one first flow path in the center of the central region in the stacking direction of the heat transfer plates is a reference flow path, and one first series passage communicates with only one reference flow path. It may be.

  As another aspect of the present invention, the reference channel is configured by a plurality of first channels in the central region in the stacking direction of the heat transfer plates, and the main body communicates with the plurality of reference channels at corresponding positions. One primary branch path communicates with one of the two reference channels on the outermost side of the plurality of reference channels, and the other primary branch path has a plurality of primary branch paths. One of the two reference channels on the outermost side of the reference channel may communicate with the other reference channel, and one of the first series channels may communicate with a plurality of reference channels.

  As another aspect of the present invention, two or more first flow paths are provided on each of one end side and the other end side of the reference flow path in the stacking direction of the heat transfer plates, and the main body is stacked in the stacking direction of the heat transfer plates. A connection path for communicating two or more first flow paths provided on one end side with respect to the reference flow path in the above, and two or more provided on the other end side with respect to the reference flow path in the stacking direction of the heat transfer plates You may have a connection path which connects 1st flow paths.

  In this case, three or more first flow paths are provided on each of the one end side and the other end side of the reference flow path in the stacking direction of the heat transfer plates, and the main body is formed of the reference flow path in the stacking direction of the heat transfer plates. Each of the one end side and the other end side are two or more connection paths for communicating adjacent first flow paths, and two or more connection paths provided at different positions in the stacking direction of the heat transfer plates. Each of the two or more connection paths may be arranged at different positions in a direction orthogonal to the stacking direction of the heat transfer plates with respect to another connection path communicating with the first flow path communicating with the connection path. Good.

FIG. 1 is a schematic overall perspective view of a plate heat exchanger according to an embodiment of the present invention. FIG. 2 is a schematic exploded perspective view of the plate heat exchanger according to the embodiment. FIG. 3 is a schematic diagram for explaining the flow path of the first fluid and the flow path of the second fluid of the plate heat exchanger according to the embodiment. FIG. 4 is a schematic diagram for explaining the flow path of the first fluid and the flow path of the second fluid of the plate heat exchanger according to another embodiment of the present invention. FIG. 5 is a schematic view for explaining the flow path of the first fluid and the flow path of the second fluid of the plate heat exchanger according to another embodiment of the present invention. FIG. 6 is a schematic diagram for explaining the flow path of the first fluid and the flow path of the second fluid of the conventional plate heat exchanger.

  Hereinafter, a plate heat exchanger according to an embodiment of the present invention will be described with reference to the accompanying drawings.

  As shown in FIG. 1, the plate heat exchanger includes a main body 3 including a plurality of stacked heat transfer plates 2.

  As shown in FIGS. 2 and 3, the main body 3 includes a first flow path 30, a second flow path 31, a pair of first series passages 32 and 33, and a pair of second communication paths 34 and 35. . The first flow path 30 allows the first fluid A to flow. The second flow path 31 circulates the second fluid B. The pair of first series passages 32 and 33 communicate with the first flow path 30 and allow the first fluid A to flow into and out of the first flow path 30. The pair of second communication passages 34 and 35 communicate with the second flow path 31 and allow the second fluid B to flow into and out of the second flow path 31. In the following description, one of the pair of first series passages 32 and 33 is referred to as a “first inflow communication path”. The other first series passage 33 of the pair of first series passages 32 and 33 is referred to as a “first outflow communication path”. One of the pair of second communication passages 34 and 35 is referred to as a “second inflow communication passage”. The other second communication path 35 of the pair of second communication paths 34 and 35 is referred to as a “second outflow communication path”.

  The first flow path 30 and the second flow path 31 are alternately formed with the heat transfer plates 2,. On the other hand, each of the first inflow communication path 32, the first outflow communication path 33, the second inflow communication path 34, and the second outflow communication path 35 passes through the heat transfer plates 2,. The plate 2 extends in the stacking direction (hereinafter referred to as the first direction).

  This will be described more specifically. The plate type exchanger 1 according to this embodiment includes a main body 3 including a plurality of stacked heat transfer plates 2, and a pair of end plates 4 and 5 sandwiching the main body 3.

  Each of the plurality of heat transfer plates 2,... Is formed by press-molding a metal plate as shown in FIG. Each of the heat transfer plates 2,... Has a heat transfer section 20 that defines the first flow path 30 and the second flow path 31, and an annular shape that extends from the outer periphery of the heat transfer section 20 in a direction that intersects the heat transfer section 20. The fitting part 21 is provided.

  A plurality of recesses and protrusions (not shown) are alternately formed on the front and back of the heat transfer section 20 of each heat transfer plate 2. And in the heat-transfer part 20 of each heat-transfer plate 2, ..., the 1st inflow communication path 32, the 1st outflow communication path 33, the 2nd inflow communication path 34, and the 2nd outflow communication path 35 are formed. An opening (not numbered) is formed. That is, openings are provided in at least four places of the heat transfer section 20 of the heat transfer plates 2. This opening is for forming a flow path extending in the first direction and penetrates the heat transfer section 20.

  The plate heat exchanger 1 according to this embodiment includes a plurality of types of heat transfer plates 2. The plate heat exchanger 1 according to the present embodiment forms the first inflow communication passage 32, the first outflow communication passage 33, the second inflow communication passage 34, and the second outflow communication passage 35 as described above. In addition to the heat transfer plates 2 formed with openings, the heat transfer plates 2 formed with openings for forming primary branch paths 36a and 36a or secondary branch paths 36b and 36b described later are provided. In the present embodiment, the first inflow communication path 32, the first outflow communication path 33, the second inflow communication path 34, the second outflow communication path 35, the primary branch paths 36a and 36a, and the secondary branch paths 36b and 36b. The flow paths such as are described in detail. On the other hand, the description regarding the number, arrangement | positioning, and size of the opening for forming these is omitted.

  Each of the pair of end plates 4 and 5 is formed by press-molding a metal plate, and is formed in substantially the same shape as the heat transfer plates 2. Specifically, the end plates 4 and 5 include sealing portions 40 and 50 and annular fitting portions 41 and 51. The sealing parts 40 and 50 are formed in substantially the same shape as the heat transfer part 20. The annular fitting portions 41 and 51 extend from the entire outer periphery of the sealing portions 40 and 50 in a direction crossing the sealing portions 40 and 50.

  One end plate (hereinafter referred to as a first end plate) 4 is an opening formed in adjacent heat transfer plates 2,..., And includes a first inflow communication path 32, a first outflow communication path 33, and a second inflow. An opening (not numbered) corresponding to the opening for forming the communication path 34 and the second outflow communication path 35 is provided. That is, the openings are provided at four locations on the sealing portion 40 of the first end plate 4. Accordingly, cylindrical nozzles (not numbered) for connecting pipes are connected to the outer surface of the sealing portion 40 of the first end plate 4 in an arrangement corresponding to each opening.

  On the other hand, the opening part is not provided in the sealing part 50 of the other end plate (hereinafter referred to as the second end plate) 5. That is, the second end plate 5 includes a sealing portion 50 that can seal a flow path formed by the openings of the heat transfer plates 2.

  The plurality of heat transfer plates 2,. In this state, the protrusions of the heat transfer portions 20 of the adjacent heat transfer plates 2,... Intersect each other, and the fitting portions 21 of the adjacent heat transfer plates 2,. Along with this, the close contact portion between the adjacent heat transfer plates 2,... Is sealed by brazing, and the main body portion 3 is formed.

  The first end plate 4 and the second end plate 5 are superimposed on the plurality of heat transfer plates 2,... So as to sandwich the plurality of stacked heat transfer plates 2,. In this state, the fitting portions 21 of the first end plate 4 and the second end plate 5 are fitted with the fitting portions 21 of the adjacent heat transfer plates 2. In connection with this, the close part of each of the 1st end plate 4 and the 2nd end plate 5, and the adjacent heat-transfer plate 2, ... (main-body part 3) is sealed by brazing.

  Thereby, as shown in FIG.2 and FIG.3, the 1st flow path 30 and the 2nd flow path 31 are alternately formed in the main-body part 3 on the boundary of the heat-transfer plate 2, .... In this embodiment, the 1st flow path 30 distribute | circulates the 1st fluid A in which phase changes, such as Freon and ammonia. The second flow path 31 circulates a liquid second fluid B such as water or brine.

  Further, the openings of the plurality of heat transfer plates 2,... Are connected, whereby the first inflow communication passage 32, the first outflow communication passage 33, the second inflow communication passage 34, and the second outflow communication passage 35 are respectively connected to the first inflow communication passage 32. It is formed extending in one direction.

  This will be described more specifically. In the present embodiment, the heat transfer section 20 of the heat transfer plates 2, ... is formed in a rectangular shape in plan view (viewed in the normal direction of the heat transfer section 20).

  The first inflow communication path 32 and the second outflow communication path 35 are provided on one end side of the heat transfer plates 2 in the longitudinal direction of the heat transfer section 20 (hereinafter referred to as the second direction). Moreover, the 1st outflow communication path 33 and the 2nd inflow communication path 34 are provided in the other end side of the heat-transfer plate 2, ... in a 2nd direction.

  FIG. 3 is a schematic diagram. Therefore, the first inflow communication passage 32, the first outflow communication passage 33, the second inflow communication passage 34, and the second outflow communication passage 35 are arranged in the second direction in FIG. 3 (arranged in parallel). ) However, actually, the first inflow communication path 32 and the second outflow communication path 35 are in the short direction of the heat transfer section 20 (the direction orthogonal to the first direction and the second direction, hereinafter referred to as the third direction). Are lined up. Further, the second inflow communication passage 34 and the first outflow communication passage 33 are also arranged in the short direction (third direction) of the heat transfer section 20.

  Thereby, in the plate heat exchanger 1, the first fluid A flows through the first flow path 30 in the second direction orthogonal to the first direction. Further, the second fluid B flows in the second direction in the second flow path 31. That is, in the plate heat exchanger 1 according to this embodiment, the first fluid A flows in the longitudinal direction of the heat transfer section 20 in the first flow path 30, and the second fluid B flows in the second flow path 31. 20 circulates in the longitudinal direction.

  In the plate heat exchanger 1 of the present embodiment, the first flow paths 30,... Communicate with each other to form a first fluid A flow path from the first inflow communication path 32 to the first outflow communication path 33. ing. And in the plate type heat exchanger 1 of this embodiment, the at least 1 1st flow path 30 in the center area | region of a 1st direction is the reference | standard flow path Ra. The reference channel Ra is a branch position of the channel of the first fluid A. More specifically, one first flow path 30 at the center of the central region in the first direction is the reference flow path Ra.

  The main body 3 has at least a pair of primary branch paths 36a and 36a. The pair of primary branch paths 36a, 36a communicates the reference flow path Ra and at least one first flow path 30 on one end side in the first direction with respect to the reference flow path Ra, and also connects the reference flow path Ra and the reference flow path. At least one first flow path 30 on the other end side in the first direction with respect to the flow path Ra is communicated. That is, the main body 3 has a primary branch path 36a that communicates (connects) the reference flow path Ra and at least one first flow path 30 located on one end side in the first direction with respect to the reference flow path Ra. . Further, the main body 3 includes a primary branch path 36a that communicates (connects) the reference flow path Ra and at least one first flow path 30 on the other end side in the first direction with respect to the reference flow path Ra. Have. The primary branch paths 36a, 36a of the present embodiment are provided so as to penetrate through the central portion of the heat transfer section 20 in the second direction.

  The main body 3 of the present embodiment has a plurality of first flow paths 30 on each of one end side and the other end side in the first direction with respect to the reference flow path Ra.

  The plurality of first flow paths 30 of the main body 3 are divided into two or more blocks B1 and B2. In the main body 3 of the present embodiment, the entire one end side in the first direction is divided into a single block (hereinafter, this block is referred to as a first large block B1) with the reference channel Ra as a boundary. The main body 3 is divided into a single block (hereinafter, this block is referred to as a second large block B2) in the first direction with respect to the reference channel Ra as a boundary.

  Each of the first large block B1 and the second large block B2 (a part on one end side and a part on the other end side in the first direction with respect to the reference flow path Ra in the main body 3) has a plurality of first flow paths 30. In the present embodiment, the first flow path 30 of the first large block B1 (one end side in the first direction with respect to the reference flow path Ra in the main body 3) and the second large block B2 (reference flow path in the first direction). The number of first flow paths 30 on the other end side relative to Ra is the same.

  The plurality of first flow paths 30 in each of the first large block B1 and the second large block B2 (one end side and the other end side with respect to the reference flow path Ra in the first direction) are a set of blocks B1a and B2a. , B1b, B2b. Each block B1a, B2a, B1b, B2b has three or more first flow paths 30, respectively.

  In the present embodiment, the first flow path 30 in the center region in the first direction of each of the first large block B1 and the second large block B2 is an intermediate reference flow path Rb that is a branch position of the flow path of the first fluid A. It is. That is, each of the first large block B1 and the second large block B2 includes all the first flow paths 30 (a plurality of first flow paths 30,...) On one end side in the first direction with the intermediate reference flow path Rb as a boundary. A single block (hereinafter, this block is referred to as a first small block) B1a, B2a and all the first flow paths 30 on the other end side in the first direction with the intermediate reference flow path Rb as a boundary (multiple blocks) Are divided into single blocks (hereinafter, these blocks are referred to as second small blocks) B1b and B2b.

  In the present embodiment, one first flow path 30 in the center of the central region in the first direction of each of the first large block B1 and the second large block B2 is the intermediate reference flow path Rb. The first small block B1a, B2a and the second small block B1b, B2b (on the one end side in the first direction and the other end side of the intermediate reference flow path Rb in each of the first large block B1 and the second large block B2) Each of the portions has a plurality of first flow paths 30. In the present embodiment, the number of first flow paths 30 in each of the first small blocks B1a and B2a and the second small blocks B1b and B2b (one end side and the other end side from the intermediate reference flow path Rb in the first direction) is The same.

  The primary branch paths 36a and 36a communicate with the intermediate reference flow path Rb. More specifically, one primary branch path 36a passes through the second small block B1b in the first large block B1 and communicates with the intermediate reference flow path Rb of the first large block B1. The other primary branch path 36a passes through the first small block B2a in the second large block B2 and communicates with the intermediate reference flow path Rb of the second large block B2.

  And as above-mentioned, the main-body part 3 which concerns on this embodiment is divided in each of 1st large block B1 and 2nd large block B2 on the basis of intermediate | middle reference flow path Rb. Accordingly, the main body 3 has at least a pair of secondary branch paths 36b and 36b. The pair of secondary branch passages 36b and 36b includes an intermediate reference flow path Rb and at least one first flow path 30 on one end side in the first direction from the intermediate reference flow path Rb or the intermediate reference flow path Rb. Also, at least one first flow path 30 on the other end side in the first direction is communicated (connected). That is, the main body 3 according to the present embodiment has a secondary branch path 36b that connects (connects) the intermediate reference flow path Rb and at least one first flow path 30 of the first small blocks B1a and B2a, and A secondary branch path 36b that communicates (connects) the intermediate reference path Rb and at least one first path 30 of the second small blocks B1b and B2b is provided.

  Each of the first small blocks B1a and B2a and the second small blocks B1b and B2b includes a plurality of first flow paths 30. Each of the first small blocks B1a and B2a and the second small blocks B1b and B2b of the present embodiment includes three first flow paths 30.

  The main body 3 has connection paths 37a and 37b that allow the adjacent first flow paths 30 to communicate with each other in each of the first small blocks B1a and B2a and the second small blocks B1b and B2b.

  More specifically, each of the first small blocks B1a, B2a and the second small blocks B1b, B2b has the three first flow paths 30, as described above. The three first flow paths 30 are aligned in the first direction. A first flow path (hereinafter referred to as the innermost first flow path) 30 adjacent to the intermediate reference flow path Rb communicates with the intermediate reference flow path Rb via the secondary branch paths 36b and 36b. The innermost first flow channel 30 is a first flow channel adjacent to the opposite side of the intermediate reference flow channel Rb (a first flow channel in the middle of the three first flow channels 30 arranged in the first direction (hereinafter referred to as an intermediate first flow channel 30). And a connection path (hereinafter referred to as a first connection path) 37a. The intermediate first flow path 30 is connected to a first flow path (hereinafter referred to as an outermost first flow path) 30 and a connection path (hereinafter referred to as a second connection path) 37b adjacent to each other on the opposite side of the innermost first flow path 30. Communicate.

  In this embodiment, each 1st connection path 37a in 1st small block B1a, B2a and 2nd small block B1b, B2b is arrange | positioned so that it may mutually become concentric in a 1st direction. Moreover, each 2nd connection path 37b in 1st small block B1a, B2a and 2nd small block B1b, B2b is arrange | positioned so that it may mutually become concentric in a 1st direction. As described above, the secondary branch paths 36b and 36b and the first connection path 37a are arranged with an interval in the second direction so that the first fluid A flows in the second direction in the first flow path 30. ing. In addition, the first connection path 37a and the second connection path 37b are arranged at an interval in the second direction. Thus, in each of the first small blocks B1a, B2a and the second small blocks B1b, B2b, the flow path of the first fluid A is the innermost first flow path 30, the first connection path 37a, the intermediate first flow path 30, The second connection path 37 b and the outermost first flow path 30 are formed to meander.

  The first inflow communication passage 32 of the present embodiment extends from one end in the first direction to the reference channel Ra in the central region of the first direction in the main body 3 and communicates only with the reference channel Ra.

  On the other hand, the first outflow communication passage 33 extends from one end in the first direction to the other end in the main body portion 3, and the outermost first flows of the first small blocks B1a and B2a and the second small blocks B1b and B2b. It communicates only with the road 30. That is, in the present embodiment, the end of the flow path of the first fluid A in the first large block B1 and the second large block B2 (the first flow path 30,. The end of the flow path of the first fluid A) is the outermost first flow path 30 of each of the first small blocks B1a, B2a and the second small blocks B1b, B2b.

  Thus, the outermost first flow paths 30 of the first large block B1 and the second large block B2 are in communication with the first outflow communication passage 33. Therefore, in each of the first large block B1 and the second large block B2 in the plate heat exchanger 1 of the present embodiment, the flow path of the first fluid A is the first inflow communication path 32 and the first outflow communication path 33. It is formed to meander between the two. And the meandering flow path for the first fluid A formed in the first large block B1 (the flow path of the first fluid A starting from one primary branch path 36a on one end side in the first direction), The meandering flow path for the first fluid A formed in the two large blocks B2 (the flow path of the first fluid A starting from the other primary branch path 36b on the other end side in the first direction) is a reference flow It is formed symmetrically with respect to the path Ra.

  In contrast, each of the second inflow communication passage 34 and the second outflow communication passage 35 extends from one end of the main body 3 to the other end in the first direction. Each of the plurality of second flow paths 31,... Communicates with the second inflow communication path 34 and the second outflow communication path 35. Accordingly, the flow path of the second fluid B is formed straight between the second inflow communication passage 34 and the second outflow communication passage 35. In the present embodiment, the flow path of the second fluid B formed in the first large block B1 and the flow path of the second fluid B formed in the second large block B2 are in the first direction. Symmetric with respect to the central region.

  Therefore, in the plate heat exchanger 1 of the present embodiment, the flow path of the first fluid A is configured to meander between the first inflow communication path 32 and the first outflow communication path 33. On the other hand, the flow path of the second fluid B is configured straight between the second inflow communication passage 34 and the second outflow communication passage 35.

  As described above, the plate heat exchanger 1 according to the present embodiment includes the main body 3 including the plurality of stacked heat transfer plates 2. The main body 3 includes a first flow path 30 through which the first fluid A flows, a second flow path 31 through which the second fluid B flows, and a first inflow communication path that communicates with the first flow paths 30. 32 and the first outflow communication passage 33, the first inflow communication passage 32 and the first outflow communication passage 33 through which the first fluid A flows into and out of the first flow passages 30,. A second inflow communication passage 34 and a second outflow communication passage 35 that communicate with each other, and the second inflow communication passage 34 and the second outflow communication passage 35 that allow the second fluid B to flow into and out of the second flow paths 31. Have. And the 1st flow path 30, ... and the 2nd flow path 31, ... are formed alternately by making the heat-transfer plate 2, ... into a boundary. Each of the first inflow communication passage 32, the first outflow communication passage 33, the second inflow communication passage 34, and the second outflow communication passage 35 extends in the first direction through the heat transfer plates 2,. .

  In the plate heat exchanger 1 according to this embodiment, at least one first flow path 30 in the central region in the first direction is a reference flow path Ra that is a branch position of the flow path of the first fluid A. . The main body 3 includes a reference channel Ra, a first channel 30 in each of the first large block B1 and the second large block B2 (one end side and the other end side of the reference channel Ra in the first direction), At least a pair of primary branch paths 36a, 36a. The first inflow communication passage 32 communicates only with the reference channel Ra. The first outflow communication passage 33 is a first flow path 30 in the first large block B1 and the second large block B2 (one end side and the other end side from the reference flow path Ra in the first direction), When one channel 30,... Communicates with each other, it communicates only with the first channel 30 that is the end of the channel of the first fluid A formed with the reference channel Ra as a starting point. The flow path of the first fluid A starting from one primary branch path 36a in the first large block B1 (one end side of the reference flow path Ra in the first direction) and the second large block B2 (first direction) The flow path of the first fluid A starting from the other primary branch path 36a (on the other end side of the reference flow path Ra in FIG. 1) is formed symmetrically with respect to the reference flow path Ra.

  Therefore, according to the plate heat exchanger 1 according to the present embodiment, the first inflow communication passage 32 has the reference channel Ra (the first flow path) in the central region in the first direction (the center of the central region in the present embodiment). It communicates with only one flow path 30). Thus, since the first inflow communication passage 32 is formed only up to the central region in the first direction (the center of the central region in the present embodiment), the pressure loss of the first fluid A in the first inflow communication passage 32 Can be suppressed.

  The pair of primary branch passages 36a and 36a are provided in the reference channel Ra and the first large block B1 and the second large block B2 (one end side and the other end side of the reference channel Ra in the first direction). A certain first flow path 30 is in communication. For this reason, in the main body 3, as a flow path of the first fluid A, a system including one primary branch path 36 a communicating with the reference flow path Ra and the other primary branch path 36 a communicating with the reference flow path Ra. Two lines are formed with a line including

  Accordingly, the length of the flow path of the first fluid A from the first inflow communication path 32 to the first outflow communication path 33 (flow path length per system) is shortened. Thereby, in the plate type heat exchanger 1 of the said structure, the increase in the pressure loss in the whole flow path of the 1st fluid A can be suppressed, and high heat exchange performance can be obtained.

  In particular, in the plate heat exchanger 1 of the present embodiment, the flow of the first fluid A starting from one primary branch path 36a in the first large block B1 (one end side of the reference flow path Ra in the first direction). And the flow path of the first fluid A starting from the other primary branch path 36a in the second large block B2 (the other end side of the reference flow path Ra in the first direction) is based on the reference flow path Ra. Symmetrically formed. Therefore, the flow mode and flow distance of the first fluid A from the first inflow communication path 32 to the first outflow communication path 33 in the first large block B1 (one end side of the reference flow path Ra in the first direction), the first The flow mode and flow distance of the first fluid A from the first inflow communication path 32 to the first outflow communication path 33 in the two large blocks B2 (the other end side of the reference flow path Ra in the first direction) are equal. Thereby, the 1st fluid A distribute | circulates uniformly in all of the some 1st flow paths 30, ... in the main-body part 3. FIG. Therefore, in the plate heat exchanger 1 having the above configuration, the first fluid A and the second fluid B can be efficiently heat-exchanged in the main body 3.

  In the present embodiment, there are three or more first flow paths 30,... In each of the first large block B1 and the second large block B2 (one end side and the other end side with respect to the reference flow path Ra in the first direction). Is provided. And in each of the 1st large block B1 and the 2nd large block B2, the 1st flow path 30 in the center area | region of the 1st direction among the three or more 1st flow paths 30, ... is the flow path of the 1st fluid A. The intermediate reference flow path Rb that is the branching position of. The main body 3 includes the intermediate reference channel Rb, the first small blocks B1a and B2a, and the second small blocks B1b and B2b (a portion on one end side of the intermediate reference channel Rb in the first direction in the main body 3 and It has at least a pair of secondary branch paths 36b, 36b communicating with the first flow path 30 in each of the other end side portions). Each of the primary branch paths 36a, 36a communicates with the intermediate reference flow path Rb in each of the first large block B1 and the second large block B2 (one end side and the other end side with respect to the reference flow path Ra in the first direction). To do. The flow path of the first fluid A starting from one of the secondary branch paths 36b in the first small blocks B1a and B2a (one end side of the medium-term reference flow path Rb in the first direction) and the second small blocks The flow path of the first fluid A starting from the other secondary branch path 36b in B1b and B2b (the other end side of the medium-term reference flow path Rb in the first direction) is symmetrical with respect to the intermediate reference flow path Rb. Is formed.

  Accordingly, the primary branch paths 36a and 36a are arranged in the first direction central region (one end side and the other end side of the reference flow path Ra in the first direction) in the first large block B1 and the second large block B2, respectively. In this embodiment, it communicates only with the intermediate reference channel Rb (first channel 30) in the center of the central region. Thus, in each of the first large block B1 and the second large block B2 (one end side and the other end side with respect to the reference flow path Ra in the first direction), the primary branch paths 36a and 36a are formed in the central region in the first direction. It is formed only up to (in the present embodiment, the center of the central region). For this reason, an increase in the pressure loss of the first fluid A in the primary branch paths 36a, 36a can be suppressed. And in each of the 1st large block B1 and 2nd large block B2 (one end side and other end side rather than the reference | standard flow path Ra in a 1st direction) of the main-body part 3, it is an intermediate | middle reference | standard as a flow path of the 1st fluid A Two systems are formed: a system including one secondary branch path 36b communicating with the flow path Rb and a system including the other secondary branch path 36b communicating with the intermediate reference flow path Rb. Accordingly, in each of the first large block B1 and the second large block B2 of the main body 3, the length of the flow path of the first fluid A from the primary branch path 36a to the first outflow communication path 33 (flow per system). (Path length) becomes shorter. Thereby, in the plate type heat exchanger 1 of the said structure, the increase in the pressure loss in the whole flow path of the 1st fluid A can be suppressed, and high heat exchange performance can be obtained.

  Further, the flow path of the first fluid A starting from one of the secondary branch paths 36b in the first small blocks B1a and B2a (one end side of the intermediate reference flow path Rb in the first direction) and the second small block B1b , B2b (the other end side of the intermediate reference flow path Rb in the first direction) and the flow path of the first fluid A starting from the other secondary branch path 36b are symmetrical with respect to the intermediate reference flow path Rb. Is formed. For this reason, the flow mode of the first fluid A from one secondary branch path 36b to the first outflow communication path 33 in the first small blocks B1a, B2a (one end side from the intermediate reference flow path Rb in the first direction) and Flow distance and flow of the first fluid A from the other secondary branch path 36b to the first outflow communication path 33 in the second small blocks B1b, B2b (the other end side of the intermediate reference flow path Rb in the first direction) The aspect and the distribution distance are equal. Thereby, even if the number of the heat transfer plates 2... Included in the main body 3 increases, the first fluid A circulates evenly in all of the plurality of first flow paths 30 in the main body 3. Therefore, in the plate heat exchanger 1 having the above-described configuration, the first fluid A and the second fluid B can be efficiently heat-exchanged in the main body 3.

  In particular, the first flow paths 30 are provided in the same number in each of the first large block B1 and the second large block B2. In addition, there are two first flow paths 30 in each of the first small blocks B1a and B2a and the second small blocks B1b and B2b (one end side and the other end side from the intermediate reference flow path Rb in the first direction). The same number is provided. The main body 3 includes two or more first small blocks B1a and B2a (one end side of the intermediate reference channel Rb in the first direction) in each of the first large block B1 and the second large block B2. Connection paths 37a and 37b for connecting the first flow paths 30,. Further, the main body 3 has connection paths 37a, 37b for connecting two or more first flow paths 30, ... in the second small blocks B1b, B2b (the other end side of the intermediate reference flow path Rb in the first direction). Have 1st flow path 30 in each of 1st small block B1a, B2a and 2nd small block B1b, B2b (one end side and other end side rather than middle standard flow path Rb in the 1st direction), The first flow path 30 serving as the end of the flow path is in communication with the first outflow communication path 33. As a result, the heat transfer area can be increased without lengthening the flow path of the first fluid A.

  In the present embodiment, one first flow path 30 in the central region in the first direction is the reference flow path Ra. The first inflow communication passage 32 communicates with only one reference channel Ra. Thereby, the most upstream branch position (reference flow path Ra) of the flow path of the first fluid A becomes one, and the first fluid A is on each of the one end side and the other end side of the main body 3 in the first direction. Evenly distributed. Therefore, the first fluid A flowing in each of the one end side portion and the other end side portion of the main body 3 in the first direction is equalized, and the first fluid A and the second fluid B are efficiently used in the main body 3 as a whole. Exchange heat well.

  Further, two or more first flow paths 30 are provided in each of the first large block B1 and the second large block B2 (one end side and the other end side from the reference flow path Ra in the first direction). The main body 3 includes connection paths 37a and 37b (first paths) for communicating two or more first flow paths 30 and 30 provided in the first large block B1 (one end side with respect to the reference flow path Ra in the first direction). It has a connection path 37a and a second connection path 37b). Further, the main body 3 has connection paths 37a and 37b for communicating two or more first flow paths 30 and 30 provided in the second large block B2 (the other end side with respect to the reference flow path Ra in the first direction). (First connection path 37a and second connection path 37b). As a result, the first fluid A flowing in from the primary branch passage 36a flows through the first flow paths 30,... Therefore, the first fluid A circulates evenly in each of the two or more first flow paths 30,... Located on one end side and the other end side of the reference flow path Ra in the first direction.

  In particular, in the present embodiment, there are three or more first flow paths 30,... In each of the first large block B1 and the second large block B2 (one end side and the other end side with respect to the reference flow path Ra in the first direction). Is provided. Moreover, the main-body part 3 is the 1st large block B1 and 2nd large block b2 (one end side and other end side rather than the reference | standard flow path Ra in a 1st direction), respectively, adjacent 1st flow paths 30 and 30. The two connection paths 37a and 37b communicate with each other and have two connection paths 37a and 37b provided at different positions in the first direction. Each of these two connection paths 37a and 37b is in a second direction (a direction orthogonal to the first direction) with respect to another connection path 37a and 37b communicating with the first flow path 30 that communicates with the connection paths 37a and 37b. Are arranged at different positions.

  Thereby, the plate-type heat exchanger 1 according to the present embodiment includes the first large block B1 and the second large block B2 (one end side and the other end side with respect to the reference channel Ra in the first direction). The first flow paths 30,... With different flow directions of the single fluid A are alternately arranged. That is, the first large block B1 and the second large block B2 (one end side and the other end side with respect to the reference channel Ra in the first direction) due to the difference in arrangement of the connection paths 37a and 37b at different positions in the first direction. In each of the above, the first fluid A reaches the first outflow communication passage 33 while flowing (meandering) while changing the flow direction.

  Therefore, the mode of heat exchange (the timing of heat transfer) between the first fluid A flowing in the first flow path 30,... And the second fluid B flowing in the second flow path 31,. Therefore, the first fluid A is reliably used for heat exchange from the first inflow communication passage 32 to the first outflow communication passage 33. Thereby, high heat exchange performance is achieved in the entire main body 3 (the first large block B1 and the second large block B2 (each of the one end side and the other end side of the reference channel Ra in the first direction)). Can be obtained.

  It should be noted that the plate heat exchanger according to the present invention is not limited to the above-described embodiment, and it is needless to say that modifications can be appropriately made without departing from the gist of the present invention.

  In the above embodiment, each of the first large block B1 and the second large block B2 has two small blocks (first small block and second small block) B1a, B2a, B1b, B2b with respect to the intermediate reference flow path Rb. However, the present invention is not limited to this. For example, all the first flow paths 30 may be directly communicated with the first outflow communication path 33 in each of the first large block B1 and the second large block B2 on both sides of the reference flow path Ra.

  In the above embodiment, each of the first large block B1 and the second large block B2 has two small blocks (first small block and second small block) B1a, B2a, B1b, B2b with respect to the intermediate reference flow path Rb. However, the present invention is not limited to this. For example, as shown in FIG. 4, the main body 3 includes a first large block B1 and a second large block B2 (one end side and the other end with respect to the reference flow channel Ra in the first direction) in addition to the reference flow channel Ra. Have two or more first flow paths 30,... And connection paths 37c, 37d, 37e, 37f, 37g for communicating adjacent first flow paths 30, 30 in the two or more first flow paths 30,. You may have. If it does in this way, the 1st fluid A which flowed in from primary branch channel 36a will circulate through each 1st channel 30, ... in order moving a plurality of 1st channels 30, ... arranged in the 1st direction one by one. Therefore, in each of the two or more first flow paths 30,... In each of the first large block B1 and the second large block B2 (one end side and the other end side with respect to the reference flow path Ra in the first direction). One fluid A can be distributed evenly.

  In this case, as shown in FIG. 4, the main body 3 has three or more first flow paths 30 in each of the first large block B1 and the second large block B2. The main body 3 includes two or more connection paths 37c, 37d, 37e, 37f, and 37g that allow the adjacent first flow paths 30 and 30 to communicate with each other, and are provided at different positions in the first direction. The connection paths 37c, 37d, 37e, 37f, and 37g are provided. Each of the two or more connection paths 37c, 37d, 37e, 37f, and 37g is connected to another connection path 37c, 37d that communicates with the first flow path 30 that communicates with the connection paths 37c, 37d, 37e, 37f, and 37g. , 37e, 37f, 37g may be arranged at different positions in the second direction (direction orthogonal to the first direction). In addition, when there are a plurality of connection paths 37c, 37e, and 37g on one end side in the second direction, and there are a plurality of connection paths 37d and 37f on the other end side in the second direction, they are on one end side in the second direction. The plurality of connection paths 37c, 37e, and 37g are preferably arranged in the same row (concentric), and the plurality of connection paths 37d and 37f on the other end side in the second direction are preferably arranged in the same row (concentric).

  In this way, a plurality of first flow paths 30,... With different flow directions of the first fluid A are alternately arranged in each of the first large block B1 and the second large block B2. That is, the first fluid A flows while changing the flow direction in each of the first large block B1 and the second large block B2 due to the difference in arrangement of the connection paths 37c, 37d, 37e, 37f, and 37g in the first direction. While (meandering), the first outflow communication passage 33 is reached.

  Thus, the heat exchange mode (heat transfer timing) between the first fluid A flowing in the first flow path 30,... And the second fluid B flowing in the second flow path 31,. , ... depending on the arrangement. For this reason, the first fluid A is reliably used for heat exchange from one first series passage 32 to the other first series passage 33. Thereby, high heat exchange performance can be obtained in the main body 3 as a whole (each of the first large block B1 and the second large block B2).

  In the above embodiment, one first flow path 30 in the center of the central region in the first direction is the reference flow path Ra, but is not limited to this. For example, as shown in FIG. 5, each of the plurality of first flow paths 30 in the central region in the first direction may be the reference flow path Ra. In this case, the main body 3 has a connecting straight path 38 that communicates the plurality of reference channels Ra,. One primary branch passage 36a communicates with one reference passage Ra of the two reference passages Ra, Ra on the outermost side of the plurality of reference passages Ra,. Further, the other primary branch channel 36a communicates with the other reference channel Ra of the two reference channels Ra, Ra on the outermost side of the plurality of reference channels Ra,. The first inflow communication passage 32 communicates with the plurality of reference channels Ra,.

  If it does in this way, the 1st fluid A will equally flow in into a plurality of 1st channel 30, ... (reference channel Ra, ...) in the central field in the 1st direction from one first series passage 32. For this reason, the first fluid A and the second fluid B efficiently exchange heat even in the central region of the main body 3 in the first direction. Further, since the first fluid A is equally distributed to the first large block B1 and the second large block B2 (one end side and the other end side of the main body 3 in the first direction), the first large block B1 and the second large block B1 The first fluid A flowing in each of the two large blocks B2 becomes equal. Thereby, the first fluid A and the second fluid B are efficiently heat-exchanged in the entire main body 3. In this case, there are a plurality of reference flow paths Ra,..., But the flow path of the first fluid A starting from one primary branch path 36a in the first large block B1 and the other flow path in the second large block B2. The flow path of the first fluid A starting from the primary branch path 36a is a plurality of reference flow paths Ra,... (Actually, the center in the first direction in the block Bc including the plurality of reference flow paths Ra,... (Region) as a reference.

  In the above embodiment, the plurality of first flow paths 30 are connected to the connection paths 37a, 37b on the downstream side of the final branch position (the intermediate reference flow path Rb in the above embodiment) in the flow path of the first fluid A. Although one channel was formed by making it communicate via, it is not limited to this. For example, as shown in FIG. 5, in each of the first large block B1 and the second large block B2, a plurality of first flow paths 30,... Are divided (blocked) every predetermined number in the first direction. And the main-body part 3 has the connection path (henceforth an in-block connection path) 37h, 37i which connects several 1st flow paths 30, ... for every block B1a, B1b, B2a, B2b, and adjacent block B1a , B1b, B2a, B2b (first flow paths 30, 30) may have another connection path (hereinafter referred to as a block connection path) 37j.

  In this case, the primary branch channel 36a communicating with the reference channel Ra communicates with all the first channels 30 of the adjacent blocks B1b and B2a. And the in-block connection path 37h which connects the 1st flow path 30 in block B1b, B2b is arrange | positioned at intervals in the 2nd direction with respect to the primary branch path 36a.

  Further, the block connection path 37j that connects the adjacent blocks B1a, B1b, B2a, and B2b is continuous with the intra-block connection path 37h of the upstream blocks B1b and B2a in the two adjacent blocks B1a, B1b, B2a, and B2b. Is done. The intra-block connection path 37i of the downstream blocks B1a, B2b in the two adjacent blocks B1a, B1b, B2a, B2b is a block connection path that connects the blocks B1a, B2b and the upstream blocks B1b, B2a. It is continuous with 37j.

  That is, the block connection path 37j that connects two adjacent blocks B1a, B1b, B2a, and B2b is linearly arranged with the intra-block connection paths 37h and 37i of the adjacent blocks B1a, B1b, B2a, and B2b. . The arrangement of the intra-block connection paths 37h and 37i and the block connection path 37j is maintained in relation to the adjacent blocks B1a, B1b, B2a, and B2b even when the number of blocks increases.

  In each of the first large block B1 and the second large block B2, the first flow paths 30,... Of the blocks B1a, B2b that are the end points (downstream) of the flow path of the first fluid A are the first outflow communication paths. Communicate with 33.

  In this way, the first fluid block B1 and the second large block B2 (one end side and the other end side with respect to the reference flow path Ra in the first direction) have different flow directions of the first fluid A. The first flow paths 30, ... are arranged alternately. Therefore, the mode of heat exchange (the timing of heat transfer) between the first fluid A flowing in the first flow path 30,... And the second fluid B flowing in the second flow path 31,. It depends on. For this reason, the first fluid A is reliably used for heat exchange from the first inflow communication passage 32 to the first outflow communication passage 33. Thereby, high heat exchange performance can be obtained in the main body 3 as a whole (each of the first large block B1 and the second large block B2).

  In the above embodiment, each of the first small blocks B1a, B2a and the second small blocks B1b, B2b includes the three first flow paths 30,. For example, each of the first small blocks B1a and B2a and the second small blocks B1b and B2b may include at least one first flow path 30 and communicate with the first outflow communication path 33 itself. Alternatively, each of the first small blocks B1a, B2a and the second small blocks B1b, B2b is a single flow path by the first flow path 30 included in the first small blocks B1a, B2a and the second small blocks B1b, B2b. , And the first flow path 30 serving as the terminal end thereof may be communicated with the first outflow communication path 33.

In the above embodiment, the first large block B1 and the second large block B2 are only divided into the first small blocks B1a and B2a and the second small blocks B1b and B2b, but the present invention is not limited to this. For example, the first small blocks B1a and B2a and the second small blocks B1b and B2b may be divided into smaller blocks B1a ₁ , B1a ₂ , B1b ₁ , B1b ₂ , B2a ₁ , B2a ₂ , B2b ₁ , B2b _2. . Even in this case, the flow paths of the first fluid A in each of the first large block B1 and the second large block B2 are symmetrical with respect to the reference flow path Ra. Here, the blocks B1a ₁ and B1a ₂ are obtained by dividing the first small block B1a. The blocks B2a ₁ and B2a ₂ are obtained by dividing the first small block B2a. Blocks B1b ₁ and B1b ₂ are obtained by dividing the second small block B1b. Blocks B2b ₁ and B2b ₂ are obtained by dividing the second small block B2b.

  In the above embodiment, each of the first small blocks B1a, B2a and the second small blocks B1b, B2b includes three first flow paths 30, and these first flow paths 30 are continuously communicated to each other. Although the flow path of the fluid A is meandered, the present invention is not limited to this. For example, each of the first small blocks B1a and B2a and the second small blocks B1b and B2b includes a plurality of first flow paths 30. All of the plurality of first flow paths 30 may communicate with the secondary branch paths 36 b and 36 b and with the first outflow communication path 33. In this way, the first fluid A flows into the first flow paths 30 from the secondary branch paths 36 b and 36 b, and then flows through the first flow paths 30 to the first outflow communication path 33. To do. Thus, since the first fluid A flows through the plurality of first flow paths 30, a large heat transfer area is secured without extending the flow path length of the first fluid A. As a result, the heat exchange performance of the plate heat exchanger 1 can be enhanced.

  Although the main-body part 3 of the said embodiment has a pair of primary branch paths 36a and 36a, it is not limited to this structure. The main body 3 may have two or more pairs of primary branch paths 36a. That is, the main body 3 includes at least a pair of primary branch paths 36a. What is necessary is just to have 36a.

  In this case, the second pair of primary branch paths 36a and 36a are located on the outer side of the reference flow path Ra with respect to the region where the flow path of the first fluid A starts from the first pair of primary branch paths 36a and 36a. It communicates only with the first flow path 30 in the region. At this time, in the outer region, a primary branch path (one primary branch path of the second pair of primary branch paths 36a and 36a) 36a on the one end side of the reference flow path Ra in the first direction is set as a starting point. The flow path of the first fluid A and the primary branch path (the other primary branch path of the second pair of primary branch paths 36a, 36a) 36a on the other end side from the reference flow path Ra in the first direction are the starting points. The flow path of the first fluid A is formed symmetrically with respect to the reference flow path Ra.

  That is, the n (natural number) paired primary branch passages 36a and 36a communicate with only the first flow path 30 in the region (nth region) outside the n-1 region in the main body 3, and the nth pair. The first fluid A may be provided in the nth region starting from the primary branch passages 36a, 36a.

  In the above embodiment, each of the plurality of second flow paths 31,... Communicates with the second inflow communication path 34 and the second outflow communication path 35, and the second inflow communication path 34 and the second outflow communication path 35 are connected to each other. The distribution path of the second fluid B to be connected is configured straight, but is not limited to this. For example, the flow path of the second fluid B connecting the second inflow communication path 34 and the second outflow communication path 35 may be formed to meander in the same manner as the flow path of the first fluid A. That is, the flow path of the second fluid B may have the same configuration as the flow path of the first fluid A. Specifically, the flow path of the second fluid B branches at least once on each of the one end side and the other end side of the main body 3 in the first direction. The second outflow communication passage 35 is a second flow path 31 on each of the one end side and the other end side of the main body 3 in the first direction, and is the second end that is the end of the flow path of the second fluid B. You may communicate only with the flow path 31. Also in this case, the second inflow communication passage 34 sets a flow path that becomes a branch position of the flow path of the second fluid B with respect to each of the one end side and the other end side of the main body 3 in the first direction. Then, the flow path may be divided into subdivided blocks, and the flow path of the second fluid B may be branched twice or more.

DESCRIPTION OF SYMBOLS 1 ... Plate type heat exchanger, 2 ... Heat transfer plate, 3 ... Main-body part, 4 ... 1st end plate (end plate), 5 ... 2nd end plate (end plate), 20 ... Heat transfer part, 21 ... Fit 30 ... first flow path, 31 ... second flow path, 32 ... first inflow communication path (one first series path), 33 ... first outflow communication path (the other first series path), 34 ... Second inflow communication path (one second communication path), 35 ... second outflow communication path (the other second communication path), 36a ... primary branch path, 36b ... secondary branch path, 36c ... tertiary branch path, 37a ... 1st connection path (connection path), 37b ... 2nd connection path (connection path), 37c ... Connection path, 40, 50 ... Sealing part, 41, 51 ... Fitting part, A ... 1st fluid, B ... Second fluid, B1 ... first large block (block), B2 ... second large block (block), B1a, B2a ... first small block (Block), B1b, B2b ... second small block (Block), Ra ... reference channel, Rb ... intermediate reference channel, Rc ... branch reference channel

Claims (7)

The main body includes a plurality of stacked heat transfer plates, and the main body includes a plurality of first flow paths for flowing the first fluid, a plurality of second flow paths for flowing the second fluid, and a first flow path. A pair of first communication passages that communicate with each other, a pair of first communication passages that allow the first fluid to flow into and out of the first flow passage, and a pair of second communication passages that communicate with the second flow passage, A pair of second communication passages for allowing the second fluid to flow into and out of the flow path, wherein the first flow path and the second flow path are alternately formed with the heat transfer plate as a boundary. In each of the plate-type heat exchangers, each of the communication passages is formed so as to extend through the heat transfer plate in the stacking direction of the heat transfer plate.
The first flow paths communicate with each other to form a flow path of the first fluid from one first series path to the other first series path,
At least one first flow path in the central region in the stacking direction of the heat transfer plates is a reference flow path that becomes a branch position of the flow path of the first fluid,
The main body has at least a pair of primary branch passages that communicate with at least one first flow path on each of one end side and the other end side of the reference flow path and the reference flow path in the stacking direction of the heat transfer plates,
One first series passage communicates only with the reference flow path,
The other first series passage is a first passage on one end side and the other end side with respect to the reference passage in the stacking direction of the heat transfer plates, and only on the first passage serving as the end of the first fluid passage. Communication,
The first fluid channel starting from one primary branch on one end side in the stacking direction of the heat transfer plate and the first fluid starting from the other primary branch channel on the other end in the stacking direction of the heat transfer plate The plate type heat exchanger is characterized in that the flow paths are formed symmetrically with respect to the reference flow path. Three or more first flow paths are provided on each of the one end side and the other end side of the reference flow path in the stacking direction of the heat transfer plates,
In each of the one end side and the other end side of the reference flow path in the stacking direction of the heat transfer plates, the first flow path in the central region of the heat transfer plate stacking direction among the three or more first flow paths is the first flow path. It is an intermediate reference channel that becomes the branch position of the fluid channel,
The main body has a pair of secondary branch passages that connect the intermediate reference flow path and at least one first flow path on each of one end side and the other end side of the intermediate reference flow path in the stacking direction of the heat transfer plates. Have
Each of the primary branch passages communicates with the intermediate reference flow path on each of the one end side and the other end side from the reference flow path in the stacking direction of the heat transfer plates,
The flow path of the first fluid starting from one secondary branch on one end side of the reference flow path in the stacking direction of the heat transfer plate and the other flow path on the other end side of the reference flow path in the stacking direction of the heat transfer plate The plate-type heat exchanger according to claim 1, wherein the first fluid flow path starting from the secondary branch path is symmetrically formed with respect to the intermediate reference flow path. The first flow path is provided on each of the one end side and the other end side from the reference flow path in the stacking direction of the heat transfer plates, on each of the one end side and the other end side from the intermediate reference flow path in the stacking direction of the heat transfer plates. Two or more and the same number,
The main body part has two or more first flow paths on one end side of the intermediate reference flow path in the stacking direction of the heat transfer plates on each of the one end side and the other end side of the reference flow path in the stacking direction of the heat transfer plates. A connection path that connects the two, and a connection path that connects two or more first flow paths on the other end side of the intermediate reference flow path in the stacking direction of the heat transfer plates;
At least one first flow path on each of the one end side and the other end side of the intermediate reference flow path in the stacking direction of the heat transfer plates, and at least one first flow path serving as a terminal end of the flow path of the first fluid is The plate heat exchanger according to claim 2, wherein the plate heat exchanger is in communication with the other first series passage. One first flow path in the center of the central region in the stacking direction of the heat transfer plates is a reference flow path,
The plate-type heat exchanger according to any one of claims 1 to 3, wherein one of the first series passages communicates with only one reference channel. The reference channel is constituted by a plurality of first channels in the central region in the stacking direction of the heat transfer plates,
The main body has a straight connection path that communicates a plurality of reference channels at corresponding positions,
One primary branch path communicates with one of the two outermost reference channels of the plurality of reference channels,
The other primary branch channel communicates with the other reference channel of the two outermost reference channels of the plurality of reference channels,
The plate-type heat exchanger according to any one of claims 1 to 3, wherein the first series passage communicates with a plurality of reference flow paths. Two or more first flow paths are provided on each of one end side and the other end side of the reference flow path in the stacking direction of the heat transfer plates,
The main body part is connected to two or more first flow paths provided at one end side of the reference flow path in the stacking direction of the heat transfer plates, and other than the reference flow path in the stacking direction of the heat transfer plates. The plate-type heat exchanger according to any one of claims 1 to 5, further comprising a connection path for communicating two or more first flow paths provided on the end side. Three or more first flow paths are provided on each of the one end side and the other end side of the reference flow path in the stacking direction of the heat transfer plates,
The main body part is two or more connection paths that allow the adjacent first flow paths to communicate with each other on one end side and the other end side of the reference flow path in the stacking direction of the heat transfer plates. Having two or more connecting paths provided at different positions in the direction;
Each of two or more connection paths is arrange | positioned in the position which differs in the direction orthogonal to the lamination direction of a heat exchanger plate with respect to another connection path connected with the 1st flow path which the said connection path connected. A plate type heat exchanger as described in 1.

Images