JP6196908B2 - Plate heat exchanger - Google Patents

Description

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

Conventionally, a plate heat exchanger is an evaporator that evaporates the first fluid by heat exchange between the first fluid and the second fluid, and condenses the first fluid by heat exchange between the first fluid and the second fluid. It is used for a condenser (for example, refer patent document 1).

  In general, the plate heat exchanger includes a main body 103 including a plurality of heat transfer plates 102 as shown in FIG. The main body 103 includes a first flow path 130 through which the first fluid A flows, a second flow path 131 through which the second fluid B flows, and a first inflow path 132 through which the first fluid A flows into the first flow path 130. The first outflow passage 133 for letting out the first fluid A from the first passage 130, the second inflow passage 134 for letting the second fluid B into the second passage 131, and the second fluid B from the second passage 131. And a second outflow passage 135 for allowing outflow.

  This will be described more specifically. Each of the plurality of heat transfer plates 102 has at least four openings (not numbered). And in the main-body part 103, several heat-transfer plate 102 ... is laminated | stacked. Thereby, the first space forming the first flow path 130 and the second space forming the second flow path 131 are alternately defined in the stacking direction of the heat transfer plates 102. That is, the first flow path 130 through which the first fluid A is circulated and the second flow path 131 through which the second fluid B is circulated are alternately formed with the heat transfer plates 102 as boundaries.

  Further, by stacking the plurality of heat transfer plates 102,..., Each opening formed in the heat transfer plate 102 is continuous in the stacking direction of the plurality of heat transfer plates 102,. Thus, the first inflow path 132 for allowing the first fluid A to flow into the first flow path 130, the first outflow path 133 for allowing the first fluid A to flow out from the first flow path 130, and the second fluid B into the second flow path 131. , And a second outflow passage 135 through which the second fluid B flows out from the second flow passage 131 are formed so as to penetrate the heat transfer plates 102,... (For example, refer to Patent Document 1). In the plate heat exchanger 101, the first fluid A supplied to the first inflow path 132 flows out to the first outflow path 133 through the first flow path 130. Further, the second fluid B supplied to the second inflow path 134 flows out to the second outflow path 135 through the second flow path 131. At this time, in the plate heat exchanger 101, the first fluid A flows through the first flow path 130 and the second fluid B flows through the second flow path 131. As a result, the plate heat exchanger 101 exchanges heat between the first fluid A and the second fluid B via the heat transfer surface of the heat transfer plate 102 that partitions the first flow path 130 and the second flow path 131.

  In recent years, various flow channel arrangements have been studied in the plate heat exchanger 101 for the purpose of improving the efficiency of heat exchange and reducing pressure loss in the flow channel. For example, the first fluid is caused to flow into the first space in the intermediate region of the main body portion 103 in the stacking direction of the heat transfer plate 102 by the first inflow passage, and the first fluid A is supplied from the first space to one side in the stacking direction A flow path arrangement for distributing (branching) between the first space and the first space on the other side is conceivable.

  In this case, for example, if the flow path arrangement is such that the flow path of the first fluid A is branched by the branch path 137 immediately after flowing into the branch reference space 136 as in the plate heat exchanger 101A shown in FIG. The vaporized first fluid (gas) accumulates on the end portion side opposite to the position where the first inflow passage 132 communicates in the reference space 136 (the range indicated by the broken line in FIG. 15). As described above, in the space (region) where the gas is accumulated, heat exchange between the first fluid A and the second fluid B is hardly performed, so that the efficiency of heat exchange in the plate heat exchanger 101A is lowered.

  On the other hand, when the branch passage 137 is communicated with the end of the branch reference space 136 opposite to the position where the first inflow passage 132 communicates as in the plate heat exchanger 101B shown in FIG. Can be prevented. However, since the length (flow path length) of the first fluid A from the flow into the branch reference space 136 through the first inflow path 132 to the branch path 137 increases, the flow of the first fluid A In order to secure the flow velocity of the first fluid A at the downstream end of the passage (the end portion on the first outflow passage 133 side), the pressure on the upstream side (first inflow passage 132 side) of the flow path of the first fluid A is further increased. Must be high. When the pressure of the first fluid A is increased in this way, the evaporation temperature of the first fluid A rises. For example, when the plate heat exchanger 101B is used as an evaporator, the first fluid A evaporates. It becomes difficult. That is, the efficiency of heat exchange in the plate heat exchanger 101B is reduced.

  15 and 16, only the flow path of the first fluid A is shown for convenience of explanation.

JP-A-11-287572

  Therefore, in view of the above problems, the present invention provides a plate heat exchanger in which the efficiency of heat exchange is unlikely to decrease even when the first fluid is caused to flow into the intermediate region of the main body portion in the stacking direction of the heat transfer plates by the first inflow passage. It is an issue to provide.

  The plate heat exchanger according to the present invention includes a main body having a plurality of stacked heat transfer plates, and the main body includes a first flow path through which the first fluid flows and a second flow path through which the second fluid flows. A first inflow path for flowing the first fluid into the first flow path, a first outflow path for flowing the first fluid out of the first flow path, a second inflow path for flowing the second fluid into the second flow path, A plate type heat exchanger having a second outflow path for allowing the second fluid to flow out of the two flow paths, wherein the plurality of heat transfer plates include a first space serving as a first flow path, a first flow path, and a second flow path. Of the flow paths, at least a second space serving as a second flow path is alternately defined in the stacking direction of the heat transfer plates, and the main body portion is a partition portion that partitions the space defined between the heat transfer plates. , Either the first space or the second space in the intermediate region of the main body in the stacking direction A partition section that partitions at least one of the above, a branch reference space that is a space partitioned by the partition section, and at least one first space on each of one end side and the other end side of the branch reference space in the stacking direction; The first space communicates with each other to form a first fluid flow path from the first inflow path through the branch reference space to the first outflow path. The first inflow path communicates only with the branch reference space, and the first outflow path communicates only with the first space serving as the end of the flow path of the first fluid.

  In this way, the first space or the second space is partitioned by the partitioning portion, and the space (branch reference space) in which the first fluid flows from the first inflow path and distributes the first fluid to each branch path is defined as the first space. By making the entire space or a space smaller than the entire second space, it is possible to suppress the accumulation of gas (vaporized first fluid) in the branch reference space and to shorten the distance that the first fluid flows from the first inflow path to the branch path. can do. Thereby, even if it makes a 1st fluid flow in into the intermediate region of the main-body part in the lamination direction of a heat exchanger plate by a 1st inflow path, it becomes difficult to reduce the efficiency of heat exchange in a plate type heat exchanger.

  The partition section partitions a space defined between the heat transfer plates into two spaces including a branch reference space, and the other of the two spaces that is not the branch reference space is a flow path of the first fluid. Alternatively, it is preferable to configure a part of the second fluid flow path from the second inflow path to the second outflow path.

  According to such a configuration, the flow path of the first fluid in the first space or the second space in which the partition portion is provided by using the other space as a part of the flow path of the first fluid or the second fluid. The space (the other space) other than the space used for branching (the branch reference space) can be used effectively, and as a result, the apparatus can be miniaturized.

  In this case, it is more preferable that the branch reference space is smaller than the other space.

  According to such a configuration, the size of the branch reference space is sufficiently suppressed, thereby more effectively preventing gas (vaporized first fluid) from accumulating in the branch reference space, and from the first inflow path to the branch path. The distance through which the first fluid flows can be further shortened.

  In the plate heat exchanger, the partition portion may be provided in the first space, and the other space may constitute a part of the flow path of the first fluid.

  According to such a configuration, it is more effective while preventing gas (vaporized first fluid) from accumulating in the branch reference space as compared to a plate heat exchanger configured with the entire predetermined first space as the branch reference space (ie, The heat exchange between the first fluid and the second fluid is performed) and the number of heat transfer plates is reduced while securing the length of the first fluid flow path (flow path length) (that is, the plate heat exchanger) Downsizing).

  In the plate heat exchanger, the other of the two spaces that is not the branch reference space is a flow path of the first fluid, or a flow of the second fluid from the second inflow path to the second outflow path. You may comprise a part of path | route.

  As described above, since a part of the second space in which the flow path for the second fluid is formed is set as the branch reference space, there is no need to provide the first space in which the branch reference space is partitioned. The number of heat transfer plates can be reduced as compared with a plate heat exchanger in which one entire space is configured as a branch reference space.

  As described above, according to the present invention, there is provided a plate heat exchanger in which the efficiency of heat exchange is hardly lowered even when the first fluid is caused to flow into the intermediate region of the main body portion in the stacking direction of the heat transfer plates by the first inflow passage. can do.

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 in which a part of the plate heat exchanger according to the embodiment is omitted. FIG. 3 is a schematic diagram of the flow paths of the first fluid and the second fluid of the plate heat exchanger according to the embodiment. FIG. 4 is a schematic view of the flow path of the first fluid of the plate heat exchanger according to the embodiment. FIG. 5 is a schematic diagram for explaining the heat transfer plate at the position indicated by the broken line A in FIG. 4. FIG. 6 is a schematic view of the opposing surfaces of a pair of heat transfer plates that define the first space, and is a schematic diagram for explaining the partition portion, the surrounding space, and the remaining space in the first space. . FIG. 7 is an exploded view around the partition portion in the pair of heat transfer plates that define the first space, and is an exploded view around the partition portion in the pair of heat transfer plates that form the primary reference space. FIG. 8 is an exploded view around the partition portion in the pair of heat transfer plates that define the first space, and is an exploded view around the partition portion in the pair of heat transfer plates that form the secondary reference space. FIG. 9 is an exploded view around the partition portion in the pair of heat transfer plates that define the first space, and is an exploded view around the partition portion in the pair of heat transfer plates forming the downstream end of the primary branch path. is there. FIG. 10 is a schematic diagram of the flow paths of the first fluid and the second fluid in the plate heat exchanger in which the primary reference space and the secondary reference space are formed in the second space. FIG. 11 is a schematic diagram of the flow path of the first fluid of the plate heat exchanger in which the flow paths of the first fluid branched through the primary reference space and the second reference space merge at the downstream end. FIG. 12 is a schematic diagram illustrating a configuration of an opening and a partition part of a heat transfer unit according to another embodiment. FIG. 13 is a schematic diagram illustrating a configuration of an opening and a partition part of a heat transfer unit according to another embodiment. FIG. 14 is a schematic diagram for explaining the flow paths of the first fluid and the second fluid of the conventional plate heat exchanger. FIG. 15 is a schematic diagram illustrating an example of a plate heat exchanger in which a primary branch passage communicates with an upstream position of a branch reference space in a first fluid flow path. FIG. 16 is a schematic diagram showing an example of a plate heat exchanger in which the primary branch passage communicates with the downstream position of the branch reference space in the flow path of the first fluid.

  Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.

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

  As shown in FIGS. 3 and 4, the main body 3 includes a first flow path 31 in which the first fluid A flows, a second flow path 32 in which the second fluid B flows, and the first fluid A in the first flow path 31. A first inflow path 33 for inflow, a first outflow path 34 for allowing the first fluid A to flow out of the first flow path 31, a second inflow path 35 for allowing the second fluid B to flow into the second flow path 32, and a second flow And a second outflow passage 36 through which the second fluid B flows out of the passage 32. The first flow path 31 of the present embodiment circulates the first fluid A that changes phase such as chlorofluorocarbon or ammonia. Further, the second flow path 32 of the present embodiment circulates a liquid second fluid B such as water or brine.

  Moreover, in the main-body part 3, several heat-transfer plate 2, ... is laminated | stacked, and as shown in FIG. 2, the 1st space 61 used as (including) the 1st flow path 31 and the 1st flow path 31 are included. In addition, the second spaces 62 (including) at least (including) the second flow paths 32 of the second flow paths 32 are alternately defined in the stacking direction of the heat transfer plates 2 (hereinafter referred to as the first direction). Moreover, in the main-body part 3, when the opening (not numbered) provided in the heat-transfer plate 2 continues in a 1st direction, the 1st inflow path 33, the 1st outflow path 34, the 2nd inflow path 35, and the 2nd Each of the outflow passages 36 is formed so as to penetrate the heat transfer plates 2,... And extend in the first direction.

  This will be specifically described. As shown in FIGS. 1 to 4, the plate heat exchanger 1 according to the present embodiment includes a main body 3 including a plurality of stacked heat transfer plates 2, and a pair of end plates sandwiching the main body 3. 4 and 5.

  Each of the plurality of heat transfer plates 2, ... is formed by press-molding a metal plate. Each of the heat transfer plates 2,... Has an annular shape extending from the outer periphery of the heat transfer section 20 in a direction intersecting the heat transfer section 20 and the heat transfer section 20 defining the first space 61 and the second space 62. 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 opening (No numbering) for forming the 1st inflow path 33, the 1st outflow path 34, the 2nd inflow path 35, and the 2nd outflow path 36 ) Is formed. That is, openings are provided in at least four locations of the heat transfer section 20 of the heat transfer plates 2. These openings are for forming a flow path extending in the first direction and penetrate the heat transfer section 20.

  The plate heat exchanger 1 according to this embodiment includes a plurality of types of heat transfer plates 2. As described above, the plate heat exchanger 1 includes the heat transfer plate 2 in which openings for forming the first inflow passage 33, the first outflow passage 34, the second inflow passage 35, and the second outflow passage 36 are formed. In addition to the openings for forming the first inflow path 33, the first outflow path 34, the second inflow path 35, and the second outflow path 36, a primary branch path 37A, a secondary branch path 37B, etc., which will be described later. Are provided with heat transfer plates 2,... In which a plurality of openings are formed.

  As shown in FIGS. 5 and 6, a partition wall constituting portion 70 is provided in the heat transfer portion 20 of the heat transfer plate 2, in which openings for forming the primary branch passage 37 </ b> A and the secondary branch passage 37 </ b> B are formed. Is formed. In the heat transfer section 20 of the heat transfer plate 2, the partition wall constituting section 70 of the present embodiment is a protrusion that protrudes toward the first space 61 so as to surround a plurality of openings for forming the first inflow passage 33 and the like. is there. The partition wall constituting part 70 of the present embodiment has, for example, three openings, specifically, an opening 233 for forming the first inflow path 33, an opening 237A for forming the primary branch path 37A, and a secondary branch path 37B. Is surrounded by an opening 237B. The partition wall constituting portions 70 are respectively provided at opposing positions of the heat transfer plate pairs 2 and 2 that define the first space 61. And when each heat-transfer plate 2, ... is laminated | stacked and the main-body part 3 is formed, the front-end | tips of the opposing protrusion (partition wall structure part 70) contact | abut, thereby, the 1st space 61 is enclosed by surrounding space. A partition wall (partition portion) 7 is formed that partitions into 611 and the remaining space (the other space) 612. That is, the partition unit 7 partitions the first space into the surrounding space 611 and the remaining space 612. Here, in FIG. 6, in the heat transfer plate pair 2, 2 that defines the first space 61, the contact region between the partition wall constituting portions 70, 70, the region that defines the surrounding space 611, and the remaining space 612 are illustrated. The area to be defined is indicated by changing the type of hatching.

  In addition, although the partition part 7 of this embodiment is comprised by the rib-shaped partition structure part 70 each provided in the heat-transfer plates 2 and 2 which oppose, it is not limited to this structure. For example, a protrusion or the like is provided only on one of the opposing heat transfer plates 2 and 2, and this protrusion or the like constitutes a partition portion 7 that partitions (divides) the surrounding space 611 and the remaining space 612. Also good. Moreover, the structure by which the partition part 7 separate from the heat-transfer plate 2 is arrange | positioned between a pair of heat-transfer plates 2 and 2 etc. may be sufficient. Moreover, although the partition part 7 of this embodiment partitions the 1st space 61 into the surrounding space 611 and the remaining space 612, you may partition the 2nd space 62, the 1st space 61 and the 2nd space 62 may be provided so as to partition both.

  Hereinafter, the first inflow path 33, the first outflow path 34, the second inflow path 35, the second outflow path 36, the primary branch path 37A, the secondary branch path 37B, and the like will be described in detail. The number, arrangement, size, and the like of the openings for forming these are the same as the general plate heat exchanger, the purpose of use of the plate heat exchanger 1, the first fluid A, and the second fluid B. It is appropriately selected depending on the type and flow rate.

  As shown in FIGS. 1 and 2, 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 the adjacent heat transfer plate 2, and includes a first inflow path 33, a first outflow path 34, a second inflow path 35, and a second end plate. An opening corresponding to the opening for forming the two outflow passages 36 (not numbered) is provided. That is, the openings are provided at four locations on the sealing portion 40 of the first end plate 4. Accordingly, a cylindrical nozzle (not numbered) for connecting the pipe is connected to a position corresponding to each opening on the outer surface of the sealing portion 40 of the first end plate 4.

  An opening is not provided in the sealing portion 50 of the other end plate (hereinafter referred to as a 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 are stacked (stacked) on each other. 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 are engaged. In this state, the close contact portion with the adjacent heat transfer plate 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 overlapped with 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 41 and 51 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 this state, the close portions of each of the first end plate 4 and the second end plate 5 and the adjacent heat transfer plate 2 are sealed by brazing. Thereby, in the main-body part 3, several heat-transfer plate 2, ... demarcates the 1st space 61 and the 2nd space 62 alternately in a 1st direction (refer FIG. 2).

  In this state, the corresponding openings of the plurality of stacked heat transfer plates 2,... Are connected to each other so that each flow path (the first inflow path 33, the first outflow path 34, the second inflow path 35) extends in the first direction. , Second outflow path 36, primary branch path 37A, and secondary branch path 37B).

  This will be described more specifically. The heat transfer section 20 of the heat transfer plate 2 is formed in a rectangular shape when viewed in the normal direction of the heat transfer section 20 (see FIGS. 5 and 6). For example, in the heat transfer section 20 of the heat transfer plate 2 at the position indicated by the broken line A in FIG. 4, as shown in FIGS. 5 and 6, the first outflow path 34, the second inflow path 35, and a first connection described later. A path 38 </ b> A is provided on one end side of the heat transfer plate 2 in the longitudinal direction of the heat transfer unit 20 (hereinafter referred to as the second direction). Specifically, an opening 235 for forming the second inflow passage 35 is provided at one corner on one end side of the heat transfer section 20, and an opening 238 </ b> A for forming the first connection path 38 </ b> A is provided in the heat transfer section 20. An opening 234 provided at the other corner on one end side to form the first outflow passage 34 is a short direction on one end side of the heat transfer section 20 (a direction orthogonal to the first direction and the second direction: (In three directions).

  Moreover, the 2nd outflow path 36 and the 2nd connection path 38B mentioned later are provided in the other end side of the heat exchanger plate 2 in a 2nd direction. Specifically, the opening 236 for forming the second outflow passage 36 is the other corner on the other end side of the heat transfer section 20 (the corner in the diagonal direction with respect to the opening 235 for forming the second inflow passage 35). The opening 238B for forming the second connection path 38B is diagonal to the one corner on the other end side of the heat transfer section 20 (opening 238A for forming the first connection path 38A). At the corner of the direction).

  The opening 233 for forming the first inflow passage 33, the opening 237A for forming the primary branch passage 37A, and the opening 237B for forming the secondary branch passage 37B are the other end side of the heat transfer section 20. And is surrounded by the partition portion 7 (partition wall constituting portion 70).

  3 and 4 are schematic diagrams, the first inflow path 33, the first outflow path 34, the second inflow path 35, and the second outflow path 36 are aligned in the second direction in each drawing. (Arranged in parallel). However, in practice, the first inflow passage 33 and the second outflow passage 36 are arranged in the short direction (third direction) of the heat transfer section 20 as shown in FIGS. 5 and 6. Further, the second inflow path 35 and the first outflow path 34 are also arranged in the short direction (third direction) of the heat transfer section 20.

  With these configurations, in the plate heat exchanger 1, the first fluid A flows through the first flow path 31 in the second direction orthogonal to the first direction. The second fluid B flows in the second direction in the second flow path 32. That is, in the plate heat exchanger 1 according to the present embodiment, the first fluid A flows in the longitudinal direction of the heat transfer section 20 in the first flow path 31, and the second fluid B flows in the second flow path 32. 20 circulates in the longitudinal direction.

  In the plate heat exchanger 1 of the present embodiment, a flow path of the first fluid A from the first inflow path 33 to the first outflow path 34 is formed. And in this plate type heat exchanger 1, at least one (one in the example of this embodiment) 1st space in at least one place (two in the example of this embodiment) in the middle of the first direction. 61, a primary reference space (branch reference space) S1 that is a branch position of the flow path of the first fluid A is provided. The primary reference space S <b> 1 of the present embodiment uses the surrounding space 611 provided (formed) in the first space 61. That is, in the first space 61 in which the primary reference space S1 is provided, the first space 61 is partitioned into the primary reference space S1 (the surrounding space 611) and the remaining space 612 by the partitioning section 7. For example, specifically, the primary reference space S1 at the position indicated by α in FIG. 4 is configured as shown in FIG. In FIG. 7, the surface indicated by hatching of the partition wall constituting portion 70 of one heat transfer plate 2 and the back surface of the portion indicated by smoke of the partition wall constituting portion 70 of the other heat transfer plate 2 are joined. The intermediate position in the present embodiment is an arbitrary position excluding the first spaces 61 at both ends in the first direction.

  The main body 3 has at least a pair of primary branch paths 37A and 37A for each primary reference space S1. In the main body 3 of the present embodiment, a pair of primary branch paths 37A and 37A are provided for each primary reference space S1.

  The pair of primary branch paths 37A and 37A directly or indirectly communicates the primary reference space S1 and at least one first space 61 located on one end side of the primary reference space S1 in the first direction. The reference space S1 and the at least one first space 61 located on the other end side of the primary reference space S1 in the first direction are communicated directly or indirectly. The pair of primary branch paths 37A, 37A of the present embodiment includes a primary reference space S1 and at least one secondary reference space S2 (enclosed space 611) located on one end side of the primary reference space S1 in the first direction. The primary reference space S1 is communicated with at least one secondary reference space S2 (enclosed space 611) located on the other end side of the primary reference space S1 in the first direction. That is, the main body 3 of the present embodiment communicates each primary reference space S1 with the primary reference space S1 and at least one first space 61 located on one end side in the first direction with respect to the primary reference space S1. The primary branch path 37A to be connected (connected) and the primary branch that connects (connects) the primary reference space S1 and at least one first space 61 located on the other end side in the first direction from the primary reference space S1. It has a path 37A. In this embodiment, primary branch channel 37A, 37A has penetrated the area | region (area | region which demarcates the surrounding space 611) enclosed by the partition part 7 in the heat-transfer part 20 (refer FIG. 5).

  The secondary reference space S2 of the present embodiment is a surrounding space 611 provided in the first space 61 in each of one end side and the other end side of the primary reference space S1 in the first direction. That is, the pair of primary branch paths 37A and 37A of the present embodiment includes a primary reference space S1 and at least one first space 61 on one end side of the primary reference space S1 in the first direction (specifically, the surrounding space 611). And at least one first space 61 (specifically, the enclosed space 611) on the other end side are in direct communication with each other. For example, specifically, the secondary reference space S2 at the position indicated by β in FIG. 4 is configured as shown in FIG. In FIG. 8, the surface indicated by hatching of the partition wall constituting portion 70 of one heat transfer plate 2 and the back surface of the portion indicated by smoke of the partition wall constituting portion 70 of the other heat transfer plate 2 are joined.

  In the present embodiment, the main body 3 has a plurality of first spaces 61,... On one end side and the other end side in the first direction with respect to each primary reference space S1.

  As shown in FIG. 4, the plurality of first spaces 61 of the main body 3 includes blocks for each flow path of the first fluid A from the first inflow path 33 to the first outflow path 34 (hereinafter, this block is referred to as a large block). It is divided into B1, ...). The main body portion 3 of the present embodiment has two primary reference spaces S1, and the two first fluids A that extend to the first outflow passage 34 from the communication position of the first inflow passage 33 and each primary reference space S1 as a starting point. It has a flow path. For this reason, the main-body part 3 of this embodiment is divided into two large blocks B1 and B2 arranged in the first direction. Hereinafter, the large block on one end side in the first direction is referred to as a first large block B1, and the large block on the other end side in the first direction is referred to as a second large block B2.

  Each of the large blocks B1, B2 is a block for each flow path of the first fluid A from the primary reference space S1 to the first outflow passage 34 (hereinafter, this block is referred to as a middle block) B11, B12,..., B21, B22,. It is divided into each. In the present embodiment, each of the first and second large blocks B1 and B2 is divided into two medium blocks (first medium blocks B11 and B21 and second medium blocks B12 and B22).

  Specifically, the first large block B1 includes all the first spaces 61 (a plurality of first spaces 61,...) On one end side in the first direction with respect to the first space 61 in which the primary reference space S1 is formed. Including the first middle block B11 and the first space 61 in which the primary reference space S1 is formed, and all the first spaces 61 (the plurality of first spaces 61 located on the other end side in the first direction from the first space 61). And the second middle block B12 including the first space 61, ...).

  The second large block B2 includes all the first spaces 61 (a plurality of first spaces 61) including the first space 61 in which the primary reference space S1 is formed and located on one end side in the first direction from the first space 61. The second middle block B21 including the spaces 61,... And the first blocks 61 including all the first spaces 61 (the plurality of first spaces 61,...) On the other end side in the first direction from the primary reference space S1. It is divided into two middle blocks B22.

  The plurality of first spaces 61 in each of the middle blocks B11, B12, B21, B22 is a first space 61 in an intermediate region (halfway position) of the middle blocks B11, B12, B21, B22 in the first direction. B111, B112,... B123, B124,..., B211 and B212 for each flow path of the first fluid A from the secondary reference space S2 to the first outflow passage 34 provided in ,..., B223, B224,. In the present embodiment, each of the first middle blocks B11 and B21 is divided into two small blocks (first small blocks B111 and B211 and second small blocks B112 and B212), and each of the second middle blocks B12 and B22 is divided. It is divided into two small blocks (third small block B123, B223 and fourth small block B124, B224).

  Specifically, in the first space 61 in the intermediate region in the first direction of each of the first and second middle blocks B11, B21, B12, and B22, the flow path of the first fluid A is branched as described above. A secondary reference space S2 to be a position is formed. Each of the first middle blocks B11 and B21 includes a first small space 61 including all the first spaces 61 (a plurality of first spaces 61,...) Located on one end side in the first direction with respect to the secondary reference space S2. All the first spaces 61 (the plurality of first spaces 61) including the blocks B111 and B211 and the first space 61 in which the secondary reference space S2 is formed and located on the other end side in the first direction from the first space 61. 61,...) Are divided into second small blocks B112 and B212. Each of the second middle blocks B12 and B22 includes the first space 61 in which the secondary reference space S2 is formed, and all the first spaces 61 located on one end side in the first direction with respect to the first space 61. (Third small blocks B123, B223) including (a plurality of first spaces 61,...) And all the first blocks 61 located on the other end side in the first direction from the first space 61 in which the secondary reference space S2 is formed. The first small space 61 (fourth small blocks B124, B224) including one space 61 (a plurality of first spaces 61,...) Is divided. Each of these small blocks B111, B112, B121, B122, B211, B212, B221, B222 has two or more first spaces 61,. Each of the small blocks B111, B112, B121, B122, B211, B212, B221, and B222 of the present embodiment has, for example, four first spaces 61,.

  As described above, the primary branch paths 37A and 37A communicate the primary reference space S1 and the secondary reference space S2. More specifically, in each of the large blocks B1 and B2, one primary branch path 37A passes through the second small blocks B112 and B212 in the first middle blocks B11 and B21, and the first middle blocks B11 and B21. To the secondary reference space S2. In each of the large blocks B1 and B2, the other primary branch path 37A passes through the third small blocks B123 and B223 in the second middle blocks B12 and B22, and enters the secondary reference space S2 of the second middle blocks B12 and B22. Communicate.

  And as above-mentioned, the main-body part 3 which concerns on this embodiment is divided on the basis of secondary reference space S2 in each of each middle block B11, B12, B21, B22. Accordingly, the main body 3 has at least four pairs of secondary branch paths 37B and 37B (four secondary branch path pairs 37B and 37B).

  Each secondary branch path pair 37B, 37B includes a secondary reference space S2, at least one first space 61 located on one end side in the first direction from the secondary reference space S2, and the secondary reference space S2. At least one first space 61 on the other end side in the first direction is communicated (connected). That is, each of the middle blocks B11, B12, B21, and B22 according to the present embodiment has at least one second reference space S2 and at least one of the first small blocks B111 and B211 (or the third small blocks B123 and B223). The secondary branch path 37B that communicates (connects) with the one space 61, the secondary reference space S2, and at least one first space of the second small blocks B112, B212 (or the fourth small blocks B124, B224). A secondary branch path 37 </ b> B that communicates with (connects) 61 is provided. In the present embodiment, the secondary branch passages 37B and 37B pass through a region (region defining the surrounding space 611) surrounded by the partition portion 7 in the heat transfer unit 20 (see FIG. 5). For example, specifically, at the end of the secondary branch 37B at the position indicated by γ in FIG. 4, a part of the partition wall constituting portion 70A of one heat transfer plate 2 is interrupted as shown in FIG. Thus, the Go space 611 and the remaining space 612 communicate with each other. As a result, the first fluid A that has flowed through the second branch passage 37B flows out of the surrounding space 611 through the disconnected portion and flows toward the first connection passage 38A described later. In FIG. 9, the surface indicated by hatching of the partition wall constituting portion 70 of one heat transfer plate 2 and the back surface of the portion indicated by smoke of the partition wall constituting portion 70 of the other heat transfer plate 2 are joined.

  Each of the first to fourth small blocks B111, B211, B112, B212, B123, B223, B124, and B224 includes a plurality of first spaces 61. Each of the small blocks B111, B211, B112, B212, B123, B223, B124, and B224 of this embodiment includes, for example, five first spaces 61. Accordingly, the main body part 3 connects the first adjacent spaces 61 and 61 to each other in the first to fourth small blocks B111, B211, B112, B212, B123, B223, B124, and B224. , 38B (see FIGS. 5 and 6). In the present embodiment, each of the connection paths 38A and 38B communicates with the remaining spaces 612 of the adjacent first spaces 61. That is, each of the connection paths 38 </ b> A and 38 </ b> B passes through a region that defines the remaining space 612 in the heat transfer section 20.

  More specifically, each of the small blocks B111, B211, B112, B212, B123, B223, B124, and B224 has five first spaces 61, as described above. The five first spaces 61 are arranged in the first direction. Of the five first spaces 61, a central first space 61 in the first direction (hereinafter referred to as a central first space) 61 communicates with the secondary reference space S2 via the secondary branch path 37B. . The central first space 61 includes first spaces (hereinafter referred to as intermediate first spaces) 61 and 61 adjacent to the central first space 61 on both sides in the first direction, and connection paths (hereinafter referred to as first connection paths). ) Communicate via 38A. The intermediate first space 61 is connected to a first space (hereinafter referred to as an outermost first space) 61 and a connection path (hereinafter referred to as a second connection path) 38B adjacent to each other on the opposite side of the central first space 61. Communicate.

  As described above, in order to distribute the first fluid A in the second direction in the first space 61, the secondary branch paths 37B and 37B and the first connection path 38A are arranged with an interval in the second direction. . Moreover, 38 A of 1st connection paths and the 2nd connection path 38B are arrange | positioned at intervals in the 2nd direction. Thus, in each of the small blocks B111, B211, B112, B212, B123, B223, B124, and B224, the central first space 61, the first connection path 33A, the intermediate first space 61, the second connection path 38B, The flow path of the first fluid A constituted by the outer first space 61 meanders.

  In the main body 3 of the present embodiment, the primary reference space S1 (enclosed space 611) on one end side in the first direction and the end of the flow path of the first fluid A on one end side in the first direction of the third small block B123 are provided. A space between the heat transfer plates 2 and 2 to be formed (specifically, the remaining space 612) is included in the common first space 61. Further, the heat transfer plate 2 that forms the end of the first fluid flow path on the other end side in the first direction of the second small block B212 and the primary reference space S1 (the surrounding space 611) on the other end side in the first direction. , 2 (the remaining space 612) is included in the common first space 61. Further, the heat transfer plates 2 and 2 that form the end of the flow path of the first fluid A on the secondary reference space S2 of the second small blocks B112 and B212 and one end side in the first direction of the second small blocks B112 and B212. The common space (remaining space 612) is included in the common first space 61. Further, the heat transfer plate 2, which forms the end of the second fluid block B123, the secondary reference space S2 of the B223 and the flow path of the first fluid A on the other end side in the first direction of the third small blocks B123, B223. The space between the two (remaining space 612) is included in the common first space 61.

  In this way, the remaining space 612 in the first space 61 in which the primary reference space S1 (the enclosed space 611) and the secondary reference space S2 (the enclosed space 611) are formed is part of the flow path of the first fluid A. By configuring, the number of heat transfer plates 2 is maintained while maintaining the length of the flow path of the first fluid A as compared to the case where the primary reference space S1 and the secondary reference space S2 are formed using the entire first space. Can be reduced.

  In the present embodiment, the first inflow passage 33 extends from one end in the first direction to the primary reference space S1 on the most other side of the plurality of primary reference spaces S1,. It is formed to communicate with only the reference space S1,.

  On the other hand, the first outflow passage 34 extends from one end to the other end in the first direction in the main body 3 and is the outermost first of the small blocks B111, B211, B112, B212, B123, B223, B124, B224. It communicates only with the space 61. That is, in this embodiment, the end of the flow path of the first fluid A in the first middle blocks B11, B21 and the second middle blocks B12, B22 (the first spaces 61, ... communicate with each other and the primary reference space S1 is the starting point. Is formed by the outermost first space 61 of each of the small blocks B111, B211, B112, B212, B123, B223, B124, and B224.

  On the other hand, each of the 2nd inflow path 35 and the 2nd outflow path 36 is extended from the one end of the main-body part 3 in a 1st direction to the other end, as shown in FIG. Each of the plurality of second spaces 62 arranged in the first direction communicates with the second inflow path 35 and the second outflow path 36.

  As described above, the first fluid flow path and the second fluid flow path are formed (configured) by the first space and the second space, so that in the plate heat exchanger 1 of the present embodiment, The flow path of the single fluid A is configured to meander between the first inflow path 33 and the first outflow path 34. Moreover, the flow path of the 2nd fluid B is comprised straightly between the 2nd inflow path 35 and the 2nd outflow path 36 (refer FIG. 3).

  In the plate heat exchanger 1 described above, the first space 61 is partitioned by the partition portion 7, and the first fluid A flows in from the first inflow passage 33 and distributes the first fluid A to each primary branch passage 37A. (Branch reference space) By making S1 a space smaller than the entire first space 61 or the entire second space 62, gas (vaporized first fluid) is prevented from accumulating in the primary reference space S1, and the first inflow The distance through which the first fluid A flows from the path 33 to the primary branch path 37A can be shortened. Thereby, even if the 1st fluid A is made to flow in into the middle field of body part 3 in the 1st direction by the 1st inflow way 33, the efficiency of heat exchange in plate type heat exchanger 1 becomes difficult to fall.

  In the plate heat exchanger 1 of the present embodiment, the remaining space 612 is a part of the flow path of the first fluid A or the second fluid B, whereby the first space 61 in which the partition portion 7 is provided. , The space (remaining space) 612 other than the space (branch reference space) S1 used for branching the flow path of the first fluid A can be effectively used, and as a result, the plate heat exchanger 1 can be downsized. Is possible.

  In the main body 3 of the present embodiment, since the primary reference space S1 is smaller than the remaining space 612, the size of the primary reference space S1 is sufficiently suppressed, and thereby gas (vaporized first) is contained in the primary reference space S1. It is possible to more effectively prevent the accumulation of the first fluid A), and it is possible to shorten the distance that the first fluid A flows from the first inflow path 33 to the primary branch path 37A.

  In the plate heat exchanger 1 of the present embodiment, the partition 7 is provided in the first space 61, and the remaining space 612 forms a part of the flow path of the first fluid A. For this reason, compared with the plate-type heat exchanger 1 in which the entire first space 61 is configured as a primary reference space (branch reference space), the heat exchange between the first fluid A and the second fluid B is effective. It is possible to reduce the number of the heat transfer plates 2 (that is, to reduce the size of the plate heat exchanger 1) while maintaining the length (flow path length) of the first fluid A. .

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

  In the plate heat exchanger 1 of the above-described embodiment, the primary reference space S1 and the secondary reference space S2 are formed by partitioning the first space 61 with the partition portion 7, but the configuration is not limited thereto. As shown in FIG. 10, the primary reference space S1 and the secondary reference space S2 may be formed by partitioning at least one of the primary reference space S1 and the secondary reference space S2 by the partition unit 7 (FIG. 10). In the example shown in FIG. 2, both the primary reference space S1 and the secondary reference space S2 are formed in the second space 62). As described above, the primary reference space S1 and the secondary reference space S2 are also formed by setting a part of the second space 62 in which the flow path of the second fluid B is formed as the primary reference space S1 or the secondary reference space S2. Since it is not necessary to provide the partitioned first space 61, the entire first space 61 is compared with a plate heat exchanger (conventional plate heat exchanger) configured as a primary reference space S1 or a secondary reference space S2. The number of heat transfer plates 2 can be reduced.

  Moreover, in the main-body part 3 of the said embodiment, 37 A of primary branch paths are extended from the primary reference space S1 to a 1st direction, and the 1st space 61 (one end side and other end side of a 1st direction rather than the primary reference space S1 ( In detail, although it communicates directly with each of the secondary reference spaces S2) that are part of the first space 61, it is not limited to this configuration. The primary branch path 37A has a second space 62 on one end side or the other end side in the first direction with respect to the primary reference space S1 (specifically, an enclosed space 611 formed by providing the partition portion 7 in the second space 62 (two You may communicate with the 1st space 61 of the one end side or the other end side of the 1st direction rather than primary reference space S1 via secondary reference space S2 etc.).

  Further, as shown in FIG. 11, the flow path of the first fluid A branched by the secondary reference space S2 and the pair of secondary branch paths 37B and 37B communicating with the secondary reference space S2 is a first outflow path 34. It may be configured to merge before reaching.

  The specific structure of the partition part 7 (partition wall structure part 70) is not limited. The partition part 7 of the said embodiment is comprised by the protrusion extended so that the space (1st space 61) between a pair of heat-transfer plates 2 and 2 may become a pentagon shape in the normal line direction view of the heat-transfer part 20. However, for example, as shown in FIGS. 12 and 13, the heat transfer section 20 may be configured by a protrusion that crosses in the third direction (the short direction of the heat transfer section 20). In this case, the partition part 7 may be a linearly extending protrusion, or may be a non-linearly extending protrusion that is bent or curved one or more times. Further, the projecting width constituting the partition portion 7 is not constant, and may change midway.

  The partition portion 7 of the above embodiment partitions the space (first space 61 or second space 62) defined between the heat transfer plates 2 and 2 into two spaces (the enclosed space 611 and the remaining space 612). However, it may be divided into three or more spaces.

  Further, the remaining space 612 included in the first space 61 or the second space 62 common to the primary reference space S1 or the secondary reference space S2 is either the flow path of the first fluid A or the flow path of the second fluid B. Also, it may not be used.

  Although the partition part 7 of the said embodiment is provided in each 1st space 61, it is not limited to this structure. The partition part 7 may be provided in each second space 62. In this case, the flow path of the second fluid B formed in the remaining space 612 of the second space 62 and the part surrounded by the partition part 7 in the heat transfer part 20 (part defining the surrounding space 611) are penetrated. Since the flow paths (the first inflow path 33, the primary branch path 37A, and the secondary branch path 37B in the main body section 3 of the above embodiment) are separated by the partition section 7, Heat exchange between the first fluid A (the first fluid A flowing through the first inflow passage 33, the primary branch passage 37A, and the secondary branch passage 37B) and the second fluid B can be prevented.

  The specific flow path configuration of the first fluid A in the main body 3 is not limited. In the main body 3 of the above embodiment, the flow path of the first fluid A is symmetric in the first direction (see FIG. 4), but may be asymmetric. That is, the arrangement of the primary reference space S1, the secondary reference space S2, the primary branch path 37A, the secondary branch path 37B, and the like is not limited to the arrangement in the main body 3 of the above embodiment.

  Although the main-body part 3 of the said embodiment has a pair of primary branch paths 37A and 37A with respect to each primary reference space S1, it is not limited to this structure. The main body 3 may have two or more pairs of primary branch paths 37A for each primary reference space S1. That is, the main body 3 includes at least a pair of primary branch paths 37A. What is necessary is just to have 37A.

  Moreover, in the main-body part 3 of the said embodiment, although the primary reference | standard space S1 which the 1st inflow path 33 connects is two, one may be sufficient and three or more may be sufficient.

  In the above embodiment, each of the second flow paths 32,... Communicates with the second inflow path 35 and the second outflow path 36 and connects the second inflow path 35 and the second outflow path 36. Although the flow path of B was configured straight, the present invention is not limited to this. For example, the flow path of the second fluid B connecting the second inflow path 35 and the second outflow path 36 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 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, like the flow path of the first fluid A, and the second outflow path 36. Is the second flow path 32 on each of the one end side and the other end side of the main body 3 in the first direction, and communicates only with the second flow path 32 that is the end of the flow path of the second fluid B. May be. Even in this case, a flow path that is a branch position of the flow path of the second fluid B is set, and the flow path of the second fluid B is divided into two or more blocks by dividing the flow path into subdivided blocks. You may make it make it.

  DESCRIPTION OF SYMBOLS 1 ... Plate type heat exchanger, 2 ... Heat transfer plate, 20 ... Heat transfer part, 21 ... Fitting part, 3 ... Main-body part, 31 ... 1st flow path, 32 ... 2nd flow path, 33, 33A ... 1st Inflow passage, 233... Opening for forming the first inflow passage, 34... First outflow passage, 35... Second inflow passage, 36... Second outflow passage, 37 A. For opening, 37B ... secondary branch path, 237B ... opening for forming secondary branch path, 38A ... first connection path (connection path), 38B ... second connection path (connection path), 4 ... first End plate (end plate), 5 ... Second end plate (end plate), 40, 50 ... Sealing part, 41, 51 ... Fitting part, 7 ... Partition part, 70, 70A ... Partition component part, 61 ... First One space, 62 ... second space, 611 ... Go space, 612 ... remaining space, A ... first fluid B ... second fluid, B1 ... first large block, B2 ... second large block, B11, B21 ... first medium block, B12, B22 ... second medium block, B111, B211 ... first small block, B112, B212 ... second small block, B123, B223 ... third small block, B124, B224 ... fourth small block, S1 ... primary reference space (branch reference space), S2 ... secondary reference space

Claims (5)

A main body having a plurality of stacked heat transfer plates is provided, and the main body allows the first fluid to flow into the first flow path through which the first fluid flows, the second flow path through which the second fluid flows, and the first flow path. A first inflow passage, a first outflow passage for letting out the first fluid from the first passage, a second inflow passage for letting in the second fluid into the second passage, and a second inflow of the second fluid from the second passage. A plate heat exchanger having two outlet channels,
The plurality of heat transfer plates alternately define a first space serving as a first flow path and a second space serving as at least a second flow path among the first flow path and the second flow path in the stacking direction of the heat transfer plates. And
The main body is
A partition section for partitioning a space defined between the heat transfer plates, wherein the partition section partitions at least one of the first space and the second space in the intermediate region of the main body in the stacking direction. When,
At least a pair of primary branch paths that connect the branch reference space that is a space partitioned by the partition portion and at least one first space on each of the one end side and the other end side of the branch reference space in the stacking direction; Have
The first space forms a first fluid flow path from the first inflow path through the branch reference space to the first outflow path by communicating with each other,
The first inflow channel communicates only with the branch reference space,
The plate-type heat exchanger, wherein the first outflow passage communicates only with the first space serving as a terminal end of the flow path of the first fluid. The partition section partitions a space defined between the heat transfer plates into two spaces including a branch reference space,
The other space that is not the branch reference space of the two spaces constitutes a part of the flow path of the first fluid or the flow path of the second fluid from the second inflow path to the second outflow path. Item 2. The plate heat exchanger according to Item 1.   The plate-type heat exchanger according to claim 2, wherein the branch reference space is smaller than the other space. The partition is provided in the first space,
The plate-type heat exchanger according to claim 2 or 3, wherein the other space constitutes a part of a flow path of the first fluid. The partition is provided in the second space,
The plate-type heat exchanger according to claim 2 or 3, wherein the other space constitutes a part of a flow path of the second fluid.

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