JP6306901B2 - Plate heat exchanger - Google Patents

Description

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

  The plate heat exchanger includes a plurality of stacked heat transfer plates. The plurality of heat transfer plates alternately form the first flow path and the second flow path with the heat transfer plate as a boundary. The first flow path circulates a heat exchange medium such as a refrigerant, and the second flow path circulates a heat exchange medium such as water. This type of plate heat exchanger has a heat exchange medium and a heat exchange medium via a heat transfer plate by causing the heat exchange medium to circulate through the second flow path and the heat exchange medium through the second flow path. (See, for example, Patent Document 1).

JP 2013-178014 A

  When the heat exchange performance required by the above plate-type heat exchanger alone (that is, the heat exchange performance of one plate-type heat exchanger) cannot be obtained, a plurality of plate-type heat exchangers were connected. A heat exchange system is established. This type of heat exchange system can switch the heat exchange performance between normal operation and partial load operation. In the heat exchange system of normal operation, the heat exchange medium and the heat exchange medium are exchanged with each plate heat exchanger, and all the plate heat exchangers exhibit heat exchange performance. The heat exchange system for partial load operation uses a smaller number of plate heat exchangers than during normal operation to exchange heat between the heat exchange medium and the heat exchange medium, and a smaller number of plate heats than during normal operation. Let the exchanger demonstrate its heat exchange performance. Specifically, the heat exchange system for partial load operation does not allow at least one plate heat exchanger to exert its heat exchange performance, thereby exchanging heat with a smaller number of plate heat exchangers than during normal operation. Demonstrate performance. That is, for at least one plate heat exchanger, the supply of the heat exchange medium to the first flow path is stopped, while the supply of the heat exchange medium to the second flow path is continued, thereby the plate heat exchanger In this case, heat exchange between the heat exchange medium and the heat exchange medium is not performed.

  In the heat exchange system, a plurality of plate heat exchangers are connected in parallel. This heat exchange system has a communication channel in which the upstream side and the downstream side of the second channel of each of the plurality of plate heat exchangers communicate with each other. Therefore, in the heat exchange system of partial load operation, the heat exchange medium that circulates through the second flow path of the plate heat exchanger that does not contribute to heat exchange, and the second flow of the plate heat exchanger that exhibits heat exchange performance. The heat exchange medium that has circulated through the channel merges in the downstream communication channel.

  For this reason, in the heat exchange system, it is considered that the heat influence of the heat exchange medium that has flowed through the second flow path of the plate heat exchanger that does not contribute to heat exchange is received downstream during partial load operation. It is necessary to exhibit a heat exchange performance more than necessary (exhibit a cooling performance or a heating performance more than necessary) in a plate heat exchanger that exhibits heat exchange performance. As a result, in the heat exchange system, the overall heat exchange efficiency is deteriorated.

  Then, this invention makes it a subject to provide the plate type heat exchanger which can suppress the fall of the heat exchange efficiency at the time of partial load operation in view of the said problem.

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 has a first flow path through which the heat exchange medium flows and a first heat flow through the heat exchange medium. Two flow paths, a first inflow path through which the heat exchange medium flows into the first flow path, a first outflow path through which the heat exchange medium flows out from the first flow path, and a heat exchange medium into the second flow path A second inflow path for allowing the heat exchange medium to flow out of the second flow path, and the plurality of heat transfer plates with the heat transfer plate as a boundary. The plate-type heat exchanger forms a plurality of first channels and a plurality of second channels so that the first channels and the second channels are alternately arranged in the stacking direction, and the main body portion is at least a plurality of the flow path block including one first channel and at least one second flow path It is divided into a certain first channel block and the second flow path block includes a communication passage for communicating the second flow path with each other included in the different flow paths block, the first inflow channel is independent in the flow path for each block In order to supply the heat exchange medium, a plurality of the flow path blocks are provided, the second inflow path supplies the heat exchange medium to all the flow path blocks, and the communication path is A second flow path included in the first flow path block, the second flow path communicating with the second inflow path, and a second flow path included in the second flow path block, the second outflow A second flow path communicating with the second flow path, the second flow path included in the second flow path block, the second flow path communicating with the second inflow path, and the first flow path. A second flow path that is included in one flow path block and communicates with the second outflow path. And organic and a second communication passage for communicating, the a.

  According to such a configuration, even when partial load operation is performed in which no heat exchange medium is supplied to any flow path block, the second outflow path is heat exchanged with the heat exchange medium in any flow path block. Because the heat exchange medium flows in (that is, the heat exchange medium that has circulated through the second flow path of the flow path block that contributed to heat exchange has circulated through the second flow path of the flow path block that does not contribute to heat exchange. In other words, the heat exchange medium and the second outflow passage are joined to each other and are not affected by the heat), so that a reduction in heat exchange efficiency in the plate heat exchanger can be suppressed.

Specifically, in the case of partial load operation in which a heat exchange medium is not supplied to a predetermined flow path block, the heat exchange medium flowing through the second flow path of the flow path block is the second flow path of the flow path block. In the flow path block (the different flow path block) including the second flow path that communicates with the heat exchange medium, heat exchange is performed with the heat exchange medium. For this reason, the heat exchange medium flowing out from each flow path block to the second outflow path is heat-exchanged with the heat exchange medium in any flow path block.
Further, even if a partial load operation in which the heat exchange medium is not supplied to one of the first and second flow path blocks is performed, the heat exchange medium supplied to each flow path block is the first and second flow block. When the other flow path block of the two flow path blocks is circulated, the heat exchange with the heat exchange medium is performed. For this reason, the temperature difference between the heat exchange media flowing out from each flow path block and joining in the second outflow flow path is suppressed, so that even if partial load operation is performed, the plate type heat exchanger is discharged. The temperature of the heat exchange medium is stabilized.

The plate heat exchanger according to the present invention includes a main body portion having a plurality of stacked heat transfer plates, and the main body portion distributes the heat exchange medium through a first flow path through which the heat exchange medium flows. A second flow path, a first inflow path through which the heat exchange medium flows into the first flow path, a first outflow path through which the heat exchange medium flows out from the first flow path, and a heat exchange medium in the second flow path And a second outflow path for allowing the heat exchange medium to flow out of the second flow path, and the plurality of heat transfer plates are connected to the heat transfer plate as a boundary. A plate heat exchanger that forms a plurality of first flow paths and a plurality of second flow paths so that the first flow paths and the second flow paths are alternately arranged in the stacking direction of the heat plate, A plurality of channel blocks including at least one first channel and at least one second channel. A first flow path block, a second flow path block, and a third flow path block, each having a communication path that connects the second flow paths included in different flow path blocks, the first inflow A plurality of paths are provided corresponding to the number of the flow path blocks so that the heat exchange medium can be supplied independently for each flow path block, and the second inflow path is subjected to heat exchange with all the flow path blocks. The medium is supplied, and the communication path is a second flow path included in the first flow path block, a second flow path communicating with the second inflow path, and a second flow path included in the second flow path block. A second flow path that communicates with the second flow path, the second flow path communicating with the second outflow path, and a second flow path that is included in the second flow path block, and the second inflow path A second flow path communicating with the second flow path and the second flow path included in the third flow path block, A second communication path communicating with the second outflow path, a second flow path included in the third flow path block, the second flow path communicating with the second inflow path, and A third communication path that communicates with a second flow path that is included in the first flow path block and that communicates with the second outflow path.

According to such a configuration, even when partial load operation is performed in which no heat exchange medium is supplied to any flow path block, the second outflow path is heat exchanged with the heat exchange medium in any flow path block. Because the heat exchange medium flows in (that is, the heat exchange medium that has circulated through the second flow path of the flow path block that contributed to heat exchange has circulated through the second flow path of the flow path block that does not contribute to heat exchange. In other words, the heat exchange medium and the second outflow passage are joined to each other and are not affected by the heat), so that a reduction in heat exchange efficiency in the plate heat exchanger can be suppressed.

Specifically, in the case of partial load operation in which a heat exchange medium is not supplied to a predetermined flow path block, the heat exchange medium flowing through the second flow path of the flow path block is the second flow path of the flow path block. In the flow path block (the different flow path block) including the second flow path that communicates with the heat exchange medium, heat exchange is performed with the heat exchange medium. For this reason, the heat exchange medium flowing out from each flow path block to the second outflow path is heat-exchanged with the heat exchange medium in any flow path block.

The heat exchange medium supplied to each flow path block passes through two flow path blocks including the flow path block supplied with the heat exchange medium from the second inflow path to the second outflow path. Even if a partial load operation (operation in which no heat exchange medium is supplied to one flow path block) is performed, the heat exchange medium flowing out from each flow path block to the second outflow path is a heat exchange medium. And heat exchange. As a result, the heat exchange medium that has circulated through the second flow path of the flow path block that contributed to the heat exchange is different from the heat exchange medium that has circulated through the second flow path of the flow path block that does not contribute to the heat exchange. Since it joins in an outflow channel and does not receive the heat influence, the fall of the heat exchange efficiency in the said plate type heat exchanger is suppressed.

  In addition, it is more preferable that the numbers of the first channel and the second channel included in each channel block are the same. According to such a configuration, when the partial load operation is performed, the temperature difference between the heat exchange media flowing out from the respective flow path blocks and joining in the second outflow path can be further reduced.

  Further, in the plate heat exchanger, each of the plurality of heat transfer plates is rectangular, and in each flow channel block, the second fluid is communicated with the second flow channel communicating with the second inflow channel. In the second flow path that circulates from one end portion to the other end portion in the longitudinal direction of the heat transfer plate and communicates with the second outflow passage, the second fluid is in the other end in the longitudinal direction. It is preferable to circulate from the part toward one end.

  According to such a configuration, the heat exchange medium supplied from the second inflow path to each flow path block reciprocates in the longitudinal direction of the heat transfer plate in the main body portion and flows out to the second outflow path. For this reason, the heat exchange medium supplied from the second inflow path to the second flow path is more than two plate reciprocations in the longitudinal direction in the main body, and then compared to the plate heat exchanger that flows out to the second outflow path. The flow path length of the heat exchange medium (the length of the flow path of the heat exchange medium from the second inflow path to the second outflow path) can be suppressed, and the pressure loss in the flow path can be suppressed.

  As mentioned above, according to this invention, the plate type heat exchanger which can suppress the fall of the heat exchange efficiency at the time of partial load operation can be provided.

FIG. 1 is a schematic perspective view of a plate heat exchanger according to the present embodiment. FIG. 2 is an exploded perspective view in which a part of the plate heat exchanger is omitted. FIG. 3 is a schematic diagram for explaining the flow path of the first fluid in the plate heat exchanger. FIG. 4 is a schematic view for explaining a flow path of the second fluid in the plate heat exchanger. FIG. 5 is a schematic view of a plate heat exchanger in which the second fluid reciprocates twice in the second direction. FIG. 6 is a schematic diagram for explaining each flow path block, the communication path, and the second fluid flow path in the plate heat exchanger according to the present embodiment. FIG. 7 is a schematic diagram for explaining each flow path block, communication path, and second fluid flow path in the plate heat exchanger according to another embodiment.

  Hereinafter, 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. The plate heat exchanger 1 includes a pair of end plates 4 and 5 that sandwich the main body 3 in the stacking direction of the heat transfer plates 2 (hereinafter referred to as “first direction”). The plate heat exchanger 1 exchanges heat between the first fluid (heat exchange medium) A and the second fluid (heat exchange medium) B. Specifically, the first fluid A of the present embodiment is a refrigerant such as chlorofluorocarbon or ammonia, and the second fluid B is water, brine, or the like. The plate heat exchanger 1 cools the second fluid B with the first fluid A.

  As shown in FIGS. 2 to 4, 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 fluid in the first flow path 30. A first inflow passage 32 through which A is introduced (supplied), a first outflow passage 33 through which the first fluid A flows out from the first passage 30, and a second fluid B is introduced (supplied) into the second passage 31. The second inflow path 34 and the second outflow path 35 through which the second fluid B flows out from the second flow path 31 are provided. In the main body 3 of the present embodiment, two first inflow passages 32 and two first outflow passages 33 are provided.

  In the main body 3, the first flow paths 30 and the second flow paths 31 are alternately formed with the heat transfer plate 2 as a boundary. That is, in the main body 3, by laminating the plurality of heat transfer plates 2, the first flow paths 30 and the second flow paths 31 are alternately arranged in the first direction with the heat transfer plate 2 as a boundary. A plurality of first flow paths 30 and a plurality of second flow paths 31 are formed. The plurality of first flow paths 30 form a flow path for the first fluid A from the first inflow path 32 to the first outflow path 33 by communicating with each other in the main body 3. The plurality of second flow paths 31 form a flow path of the second fluid B from the second inflow path 34 to the second outflow path 35 by communicating with each other in the main body 3.

  Moreover, in the main-body part 3, each of the 1st inflow path 32, the 1st outflow path 33, the 2nd inflow path 34, and the 2nd outflow path 35 penetrates the heat exchanger plate 2, and is extended in the 1st direction.

  Each of the plurality of heat transfer plates 2 constituting the main body 3 is formed by press-molding a metal plate. As shown in FIG. 2, each heat transfer plate 2 includes a heat transfer section 20 that defines a first flow path 30 and a second flow path 31, and an outer periphery of the heat transfer section 20 in a direction crossing the heat transfer section 20. And an annular fitting portion 21 extending from the center.

  A plurality of ridges and ridges are alternately formed on the front and back of the heat transfer section 20 of each heat transfer plate 2. Further, a plurality of openings (numbering) for forming the first inflow path 32, the first outflow path 33, the second inflow path 34, the second outflow path 35, and the like in the heat transfer section 20 of each heat transfer plate 2. Not) is formed (see FIGS. 2 to 4). That is, the heat transfer part 20 of the heat transfer plate 2 is provided with a plurality of openings penetrating the heat transfer part 20 in order to form a flow path extending in the first direction. In addition to the openings for forming the first inflow path 32, the first outflow path 33, the second inflow path 34, and the second outflow path 35 as described above, the heat transfer plate 2 is shown in FIGS. A plurality of openings for forming the primary branch path 36, the connection path 37, the secondary branch path 38, the communication paths 39A, 39B, and the like as shown are appropriately formed.

  In the present embodiment, the cross-sectional areas (flow-path cross-sectional areas) of the communication passages 39A and 39B are smaller than the cross-sectional area of the second inflow path 34 and the second outflow path 35. That is, the opening for forming the communication passages 39A and 39B is smaller than the opening for forming the second inflow passage 34 and the opening for forming the second outflow passage 35. The cross-sectional area of the primary branch path 36, the cross-sectional area of the connection path 37, and the cross-sectional area of the secondary branch path 38 are smaller than the cross-sectional area of the first inflow path 32 and the cross-sectional area of the first outflow path 33. According to this configuration, the cross-sectional area of the communication passages 39A and 39B and the cross-sectional area of the second inflow path 34 and the second outflow path 35, or the cross-sectional area of the primary branch path 36, the cross-sectional area of the connection path 37, and the secondary branch The cross-sectional area of the channel 38, the cross-sectional area of the first inflow channel 32, and the cross-sectional area of the first outflow channel 33 are the same as in the plate heat exchanger. The area of the part where heat exchange with the fluid B is performed can be further increased.

  Hereinafter, the first inflow path 32, the first outflow path 33, the second inflow path 34, the second outflow path 35, the primary branch path 36, the connection path 37, the secondary branch path 38, the communication paths 39A, 39B, and the like. The arrangement of the flow paths will be described in detail, but the description of the number and arrangement of the openings for forming the flow paths 32 to 39B will be omitted.

  The plurality of heat transfer plates 2 are superimposed on each other as shown in FIGS. At this time, 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 main portion 3 is formed by sealing the close contact portions between the adjacent heat transfer plates 2 by brazing.

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

  One end plate (hereinafter referred to as “first end plate”) 4 is an opening formed in the adjacent heat transfer plate 2, and includes two first inflow passages 32, two first outflow passages 33, A plurality of openings corresponding to the openings for forming the second inflow path 34 and the second outflow path 35 are provided. In the present embodiment, openings are provided at six locations of the sealing portion 40 of the first end plate 4. And the cylindrical nozzle (not numbered) for connecting piping is connected to the outer surface of the sealing part 40 of the 1st end plate 4 at the position corresponding to each opening, respectively.

  An opening is not provided in the sealing portion 50 of the other end plate (hereinafter referred to as “second end plate”) 5. That is, the second end plate 5 includes a sealing portion 50 that can seal the end portion of the flow path extending in the first direction formed by the opening of the heat transfer plate 2 that is overlapped.

  The first end plate 4 and the second end plate 5 are superimposed on the plurality of stacked heat transfer plates 2 so as to sandwich the main body 3 in the first direction. 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. And 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.

  By configuring as described above, the main body 3 has a first fluid that is a fluid for cooling the second fluid B with the heat transfer plate 2 as a boundary, as shown in FIGS. (Heat exchange medium) A first flow path 30 for circulating A and a second flow path 31 for circulating a second fluid (heat exchange medium) B that is a fluid to be cooled are alternately formed.

  Moreover, in the main-body part 3, when the corresponding opening of several heat-transfer plates 2, ... continues in a 1st direction, the 1st inflow path 32, the 1st outflow path 33, the 2nd inflow path 34, the 2nd outflow path 35, a primary branch path 36, a connection path 37, a secondary branch path 38, communication paths 39A, 39B, and the like are formed. Each of these flow paths 32 to 39B extends in the first direction in the main body 3.

  This will be described more specifically. Each heat transfer plate 2 has a rectangular shape (rectangular shape) when viewed from the normal direction of the heat transfer section 20. In the main body 3 in which a plurality of heat transfer plates 2 are stacked, each of the flow paths 32 to 39B is in the longitudinal direction of the heat transfer unit 20 (direction orthogonal to the first direction: hereinafter referred to as “second direction”). In the heat transfer plate 2 at one end side or the other end side. For this reason, in the main body 3, the first fluid A flows through the first flow path 30 in the second direction, and the second fluid B flows through the second flow path 31 in the second direction. That is, in the main body 3, 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 longitudinal direction of the heat transfer section 20 also in the second flow path 31. .

  3 and the right side of FIG. 4, the first inflow path 32, the first outflow path 33, the second inflow path 34, and the second outflow path 35 are arranged in the second direction for convenience. It is described in. However, in the actual arrangement, as shown in the left side of FIG. 3 and the left side of FIG. 4, the second inflow path 34 and the second outflow path 35 are arranged on one end side in the second direction in the heat transfer plate 2. In the region, the heat transfer section 20 is arranged in the short direction (direction orthogonal to the first direction and the second direction: hereinafter referred to as “third direction”). In addition, the two first outflow passages 33 are portions on one end side in the second direction in the heat transfer plate 2, and are adjacent to the portion where the second inflow passage 34 and the second outflow passage 35 are provided. Line up in the direction. Further, the two first inflow passages 32 are arranged in the third direction at a portion of the heat transfer plate 2 on the other end side in the second direction.

  Moreover, the main-body part 3 is divided | segmented into several flow-path block B1, B2 (it is divided). Each flow path block B <b> 1, B <b> 2 includes at least one first flow path 30 and at least one second flow path 31. The main body 3 of the present embodiment is divided into two flow path blocks (first flow path block B1 and second flow path block B2). The first flow path block B1 includes eleven first flow paths 30 and eleventh second flow paths 31. The second flow path block B2 includes eleven first flow paths 30 and twelve second flow paths 31. In addition, the number of the 1st flow paths 30 and the number of the 2nd flow paths 31 which are contained in each flow path block B1, B2 may be the same.

  In each of the flow path blocks B1 and B2 of the main body 3, the flow path of the first fluid A extending from the first inflow path 32 to the first outflow path 33 is formed by the communication between the first flow paths 30 as described above. Has been. In the main body 3 of the present embodiment, the arrangement of the flow paths of the first fluid A in the flow path blocks B1 and B2 is the same. For this reason, below, only arrangement | positioning of the flow path of the 1st fluid A in 1st flow path block B1 is demonstrated in detail.

  In the first flow path block B1, at least one first flow path 30 in the middle position in the first direction becomes a reference flow path Ra that is a branch position of the flow path of the first fluid A. The first flow path block B1 of the present embodiment is provided with one reference flow path Ra.

  The first flow path block B1 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, and the reference flow path Ra and the reference flow path Ra. In addition, a pair of primary branch passages 36 are provided to communicate with at least one first flow path 30 located on the other end side in the first direction. That is, the first flow path block B1 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; The reference channel Ra and a primary branch channel 36 that communicates (connects) at least one first channel 30 located on the other end side in the first direction with respect to the reference channel Ra. As shown in FIG. 3, the pair of primary branch paths 36 is provided in a portion on the other end side in the second direction in the heat transfer section 20.

  The first flow path block B1 of the present embodiment has a plurality of first flow paths 30 on one end side and the other end side in the first direction with respect to the reference flow path Ra.

  In the first flow path block B1, a plurality of first flow paths 30 located on one end side and the other end side in the first direction with respect to the reference flow path Ra are divided into two or more blocks b1 and b2. In the present embodiment, the first flow path block B1 is classified as a single block (hereinafter referred to as “first large block b1”) in the first direction with the reference flow path Ra as a boundary. At the same time, the entire other end side in the first direction is divided as a single block (hereinafter referred to as “second large block b2”) with the reference channel Ra as a boundary.

  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 in the first direction with respect to the reference flow path Ra) include two or more first flow paths. 30 is divided into a set of blocks b11, b12, b21, b22.

  Specifically, in the first flow path block B1, at least one first flow path 30 in the middle of each of the first large block b1 and the second large block b2 in the first direction is a flow path of the first fluid A. It becomes the intermediate reference flow path Rb which is a branch position. That is, each of the first large block b1 and the second large block b2 passes through all the first flow paths 30 (at least one first flow path 30) on one end side in the first direction with the intermediate reference flow path Rb as a boundary. The included single blocks (hereinafter referred to as “first small blocks”) are classified as B11 and B21. In addition, each of the first large block b1 and the second large block b2 includes all the first flow paths 30 (at least one first flow path 30) on the other end side in the first direction with the intermediate reference flow path Rb as a boundary. Are divided into single blocks (hereinafter referred to as “second small blocks”) B12 and B22.

  The pair of primary branch paths 36 communicate with the intermediate reference channel Rb. More specifically, one primary branch 36 passes through the second small block b12 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 36 passes through the first small block b21 in the second large block b2 and communicates with the intermediate reference flow path Rb of the second large block b2.

  As described above, the first flow path block B1 is divided at the intermediate reference flow path Rb in each of the first large block b1 and the second large block b2. The main body 3 includes, in the first flow path block, an intermediate reference flow path Rb and at least one first flow path 30 on each of one end side and the other end side in the first direction with respect to the intermediate reference flow path Rb. Are connected (connected) to each other. That is, the main body 3 according to the present embodiment includes a secondary branch path 38 that connects (connects) the intermediate reference flow path Rb and at least one first flow path 30 of the first small blocks b11 and b21, The secondary flow path 38 which connects (connects) the reference | standard flow path Rb and the at least 1 1st flow path 30 of 2nd small block b12, b22 is provided. As shown in FIG. 3, the pair of secondary branch paths 38 is provided at a portion on one end side in the second direction in the heat transfer section 20.

  Each of the first small blocks b11 and b21 and the second small blocks b12 and b22 includes at least one first flow path 30. And the main-body part 3 has the connection path 37 which connects the adjacent 1st flow paths 30 in each of 1st small block b11, b21 and 2nd small block b12, b22. As shown in FIG. 3, the connection path 37 is provided in a portion on the other end side in the second direction in the heat transfer section 20.

  The first small blocks b11 and b21 and the second small blocks b12 and b22 of the present embodiment have two first flow paths 30, respectively. The two first flow paths 30 are arranged in the first direction. A first flow path (hereinafter referred to as “inner first flow path”) 30 adjacent to the intermediate reference flow path Rb communicates with the intermediate reference flow path Rb via the secondary branch path 38, and the intermediate reference flow path The first channel adjacent to the opposite side of the path Rb (the first channel (hereinafter referred to as the “outer first channel”) outside the intermediate reference channel Rb of the two first channels 30 arranged in the first direction. )) Communicates with 30 via a connection path 37. Each outer first flow path 30 communicates with the first outflow path 33.

  As described above, the secondary branch path 38 and the connection path 37 are arranged with a gap in the second direction so that the first fluid A flows in the second direction in the first flow path 30. And the first outflow passage 33 are arranged at an interval in the second direction. Thereby, in each of 1st small block b11, b21 and 2nd small block b12, b22, intermediate | middle reference flow path Rb, the secondary branch path 38, the inner side 1st flow path 30, the connection path 37, and the outer side 1st flow path 30 , The flow path of the first fluid A meanders.

  In the main body 3, one of the two first inflow paths 32 (corresponding to the first flow path block B 1) is connected to the first flow path block B 1 from one end of the main body 3 in the first direction. To the reference channel Ra and communicates only with the reference channel Ra.

  Also, one of the two first outflow passages 33 (corresponding to the first flow path block B1) is the other in the first direction in the first flow path block B1 from one end in the first direction in the main body 3. It extends to the end and communicates only with the outer first flow paths 30 of the first small blocks b11 and b21 and the second small blocks b12 and b22. 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 paths 30 communicate with each other and are formed with the reference flow path Ra as the starting point. The end of the flow path of the first fluid A) is the outer first flow path 30 of each of the first small blocks b11 and b21 and the second small blocks b12 and b22. Thus, each outer first flow path 30 of the first large block b1 and the second large block b2 communicates with the first outflow path 33.

  As described above, since the first inflow path 32 communicates only with the reference flow path Ra of the single flow path block B1, B2, the first fluid A is supplied only to the single flow path block B1, B2. And the main-body part 3 of this embodiment is the 1st inflow of the number (plurality) corresponding to the number of flow path blocks B1, B2 so that the 1st fluid A can be supplied independently for every flow path block B1, B2. A path 32 is provided. Specifically, the main body 3 has two first inflow channels 32 as described above. Moreover, since the 1st outflow channel 33 is connected only to the outer side 1st flow path of one flow path block as mentioned above, the 1st fluid A is flowed out only from one flow path block B1, B2. And the main-body part 3 of this embodiment is the number (plural) of the number corresponding to the number of flow-path blocks B1, B2 so that the 1st fluid A can be made to flow out independently for every flow-path block B1, B2. A first outflow passage 33 is provided. Specifically, the main body 3 has two first outflow passages 33 as described above.

  The flow path of the first fluid A in the second flow path block B2 is also arranged (configured) similarly to the flow of the first fluid A in the first flow path block B1.

  In the main body 3, the second flow path 31 communicates with each other to form a second fluid B flow path from the second inflow path 34 to the second outflow path 35. Specifically, it is as follows.

  The second inflow channel 34 extends from one end (or near one end) in the first direction in the main body 3 to the other end (or near the other end), that is, one end (or near one end) in the first direction in the first flow path block B1. To the other end (or the vicinity of the other end) in the first direction in the second flow path block B2, and communicates with the plurality of second flow paths 31 of the flow path blocks B1 and B2, respectively. For this reason, the 2nd inflow channel 34 can supply the 2nd fluid B to all the channel blocks B1 and B2.

  In addition, the second outflow path 35 also extends from one end (or near one end) in the first direction of the main body 3 to the other end (or near the other end), that is, one end (or one end) in the first direction in the first flow path block B1. From the vicinity) to the other end (or the vicinity of the other end) in the first direction of the second flow path block B2, and communicates with the second flow paths 31 of the flow path blocks B1 and B2, respectively. For this reason, the 2nd outflow path 35 can flow out the 2nd fluid B from all the flow path blocks B1 and B2.

  The main body 3 of the present embodiment is provided with one second inflow path 34 and one second outflow path 35. Below, the 2nd flow path 31 connected (it connects) with the 2nd inflow path 34 may be called an inflow side 2nd flow path. Further, the second flow path 31 connected (communication) with the second outflow path 35 may be referred to as an outflow side second flow path.

  The second inflow channel 34 communicates with at least one second channel 31 in the middle of the first channel block B1 in the first direction, and one end side and the other end side in the first direction in the first channel block B1. Are communicated with each of the at least one second flow path 31. In the first flow path block B1 of the present embodiment, the second inflow path 34 communicates with the four inflow side second flow paths 31 that are in the middle of the first direction, and is located on one end side in the first direction. It communicates with each of the inflow side second flow path 31 and one inflow side second flow path 31 on the other end side in the first direction. In the first flow path block B1, the number of inflow side second flow paths 31 on one end side in the first direction is the same as the number of inflow side second flow paths 31 on the other end side in the first direction. It does not have to be.

  Here, in the first flow path block B1, between the inflow side second flow path 31 that is in the middle of the first direction and the inflow side second flow path 31 that is on one end side in the first direction, and the first direction At least one outflow-side second flow path 31 is disposed between the inflow-side second flow path 31 in the middle position and the inflow-side second flow path 31 on the other end side in the first direction. Yes.

  Further, the second inflow channel 34 communicates with at least one second channel 31 in the middle of the first channel in the second channel block B2, and one end side in the first direction in the second channel block B2. And at least one second flow path 31 on the other end side. In the second flow path block B2 of the present embodiment, the second inflow path 34 communicates with the two inflow side second flow paths 31 that are in the middle of the first direction, and is located on one end side in the first direction. The two inflow side second flow paths 31 and the two inflow side second flow paths 31 on the other end side in the first direction communicate with each other. In the second flow path block B2, the number of inflow side second flow paths 31 on one end side in the first direction is not the same as the number of second flow paths 31 on the other end side in the first direction. May be.

  Here, in the second flow path block B2, between the inflow side second flow path 31 in the middle of the first direction and the inflow side second flow path 31 on the one end side in the first direction, and the first At least one outflow side second flow path 31 is disposed between the inflow side second flow path 31 at a midway position in the direction and the inflow side second flow path 31 at the other end side in the first direction. ing.

  The second outflow path 35 is at least between the inflow side second flow path 31 in the middle of the first direction in the first flow path block B1 and the inflow side second flow path 31 on one end side in the first direction. One second flow path (three second flow paths in the example of the present embodiment) 31, the inflow side second flow path 31 in the middle of the first direction in the first flow path block B1, and the first direction At least one second flow path (two second flow paths in the example of the present embodiment) 31 communicated with the inflow side second flow path 31 on the other end side. In addition, the number of outflow side second flow paths 31 on one end side and the number of outflow side second flow paths 31 on the other end side across the inflow side second flow path 31 in the middle of the first direction are: It may be the same.

  Further, the second outflow path 35 is between the inflow side second flow path 31 in the middle of the first direction in the second flow path block B2 and the inflow side second flow path 31 on one end side in the first direction. And at least one second flow path (three second flow paths in the example of the present embodiment) 31 and the inflow side second flow path 31 in the middle of the first direction in the second flow path block B2, At least one second flow path (three second flow paths in the example of the present embodiment) 31 is communicated with the inflow side second flow path 31 on the other end side in the first direction. The number of outflow side second flow paths 31 on one end side and the number of outflow side second flow paths 31 on the other end side are different from each other across the inflow side second flow path 31 in the middle of the first direction. May be.

  The main body 3 has a communication path 39 that communicates the second flow paths 31 included in the different flow path blocks B1 and B2. Specifically, the communication path 39 extends in the first direction and communicates the inflow side second flow path 31 and the outflow side second flow path 31 included in different flow path blocks B1 and B2. The communication path 39 of this embodiment has two communication paths (a first series path 39A and a second communication path 39B). These first and second communication passages 39 </ b> A and 39 </ b> B extend in the first direction at the other end side in the second direction in the main body 3. 39 A of 1st series passages connect the some inflow side 2nd flow path 31 contained in 1st flow path block B1, and the some outflow side 2nd flow path 31 contained in 2nd flow path block B2. The second communication path 39B communicates the plurality of inflow side second flow paths 31 included in the second flow path block B2 and the plurality of outflow side second flow paths 31 included in the first flow path block B1.

  According to the plate heat exchanger 1 described above, even if a partial load operation in which the first fluid (heat exchange medium) A is not supplied to any one of the flow path blocks B1 and B2 is performed, The second fluid (heat exchange medium) B heat-exchanged with the first fluid A flows in any one of the flow path blocks B2 and B1 (that is, the second outflow passage without heat exchange with the first fluid A). No second fluid B flows out to 35). Thereby, when the partial load operation is performed, it is considered that the second fluid B that has flowed through the second flow paths 31 of the flow path blocks B1 and B2 that do not contribute to heat exchange is affected by the downstream side. It is not necessary to exhibit more than necessary heat exchange performance (exhibit more than necessary cooling performance or heating performance) in the flow path blocks B2 and B1 that exhibit the exchange performance. As a result, a decrease in heat exchange efficiency during partial load operation in the plate heat exchanger 1 can be suppressed.

  Specifically, in the case of partial load operation in which the first fluid A is not supplied to a predetermined flow path block (for example, the first flow path block B1), the second of one flow path block (for example, the first flow path block B1). The second fluid B flowing through the channel 31 includes a channel block (for example, a second channel block) including the second channel 31 communicating with the second channel 31 of the channel block B1 via the communication channel 39A. In B2), heat exchange is performed with the first fluid A. For this reason, the second fluid B flowing out from each flow path block B1, B2 to the second outflow path 35 is heat-exchanged with the first fluid A in any flow path block B1, B2.

  Moreover, in the plate type heat exchanger 1 of this embodiment, since the number of the 1st flow paths 30 and the 2nd flow paths 31 contained in each flow path block B1, B2 is respectively the same or substantially the same, partial load operation | movement is carried out. When it does, the temperature difference between the 2nd fluid B which flows out out from each flow path block B1, B2 and merges in the 2nd outflow path 35 can be made smaller. For this reason, when partial load operation is performed, the temperature of the 2nd fluid B discharged | emitted from the said plate type heat exchanger 1 (2nd outflow path 35) becomes more stable.

  Further, in the plate heat exchanger 1 of the present embodiment, the second fluid B supplied from the second inflow path 34 to the flow path blocks B1 and B2 reciprocates once in the second direction in the main body 3. It flows out to the second outflow passage 35. For this reason, for example, as shown in FIG. 5, there is no communication path for arbitrarily communicating the second flow paths of different flow path blocks, and the second fluid B supplied from the second inflow path 34 to the second flow path 31. Compared to the plate heat exchanger that flows out into the second outflow passage 35 after two or more reciprocations in the main body 3 in the second direction (two reciprocations in the example shown in FIG. 5), the flow length of the second fluid B ( The length of the flow path of the second fluid B from the second inflow path 34 to the second outflow path 35) can be suppressed, and the pressure loss in the flow path can be suppressed.

  The plate heat exchanger of the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the present invention.

  As shown in FIG. 6, the main body portion of the above embodiment is divided into two flow path blocks B1 and B2, but may be divided (divided) into three or more flow path blocks. For example, as shown in FIG. 7, when the main body 3 is divided into three flow path blocks (first to third flow path blocks) B1, B2, and B3, the communication path 39 is formed of the flow path blocks B1 and B2. , B3, the first to third communication passages 39A, 39B, 39C are provided. These first to third communication passages 39A, 39B, 39C are arranged as follows.

  The first series passage 39A communicates the inflow side second flow path 31 included in the first flow path block B1 and the outflow side second flow path 31 included in the second flow path block B2. The second communication path 39B communicates the inflow side second flow path 31 included in the second flow path block B2 and the outflow side second flow path 31 included in the third flow path block B3. In addition, the third communication path 39C communicates the inflow side second flow path 31 included in the third flow path block B3 and the outflow side second flow path 31 included in the first flow path block B1.

  Even with such a configuration, the second fluid B supplied to each flow path block B1, B2, B3 includes a flow path block (for example, B1) supplied with the second fluid B from the second inflow path 34. In order to pass through two flow path blocks (for example, B1 and B2, B3, and B1) and to flow into the second outflow path 35, the partial fluid operation (the first fluid A is supplied to one flow path block (for example, B1)). Even if the operation without supply) is performed, the second fluid B flowing out from the flow path blocks B1, B2, B3 to the second outflow path 35 is heat-exchanged with the first fluid A, respectively. Thereby, the second fluid B that has circulated through the second flow path 31 of the flow path block that contributed to heat exchange has circulated through the second flow path 31 of the flow path block that does not contribute to heat exchange. And the second outflow passage 35 is joined and is not affected by the heat, so that a decrease in heat exchange efficiency in the plate heat exchanger 1 can be suppressed.

  Further, in the plate heat exchanger 1 of the above embodiment, the communication paths 39A and 39B include the second flow path 31 of one flow path block (first flow path block B1 in the example of FIG. 6) and the flow path. The second flow path 31 of one flow path block (second flow path block B2 in the example of FIG. 6) different from the block (first flow path block B1 in the example of FIG. 6) is communicated. It is not limited to the configuration. The communication path is, for example, the second flow of one flow path block (for example, the first flow path block B1 when the main body 3 is divided into the first to third flow path blocks B1 to B3 as shown in FIG. 7). A plurality of flow path blocks (for example, the main body 3 is divided into first to third flow path blocks B1 to B3 as shown in FIG. 7), and the flow path block (the first flow path block B1). The second flow paths 31 of the second and third flow path blocks B2, B3) may be communicated with each other. In addition, the communication path may communicate the second flow paths 31 of the plurality of flow path blocks with the second flow paths 31 of the plurality of flow path blocks different from the plurality of flow path blocks.

  In the plate heat exchanger 1 of the above embodiment, the cross-sectional area of the first inflow passage 32, the cross-sectional area of the first outflow passage 33, the cross-sectional area of the second inflow passage 34, and the cross-sectional area of the second outflow passage 35 are the same. Yes, the cross-sectional areas (flow-path cross-sectional areas) of the communication passages 39A and 39B are smaller than the cross-sectional area of the second inflow path 34 and the second outflow path 35. The cross-sectional area of the primary branch path 36, the cross-sectional area of the connection path 37, and the cross-sectional area of the secondary branch path 38 are smaller than the cross-sectional area of the first inflow path 32 and the cross-sectional area of the first outflow path 33. However, the specific size of each cross-sectional area of each of the flow paths 32 to 39B extending in the first direction in the plate heat exchanger 1 is not limited. For example, the cross-sectional areas of the flow paths of the communication paths 39A and 39B, the primary branch path 36, the connection path 37, and the secondary branch path 38 are the first inflow path 32, the first outflow path 33, the second inflow path 34, and The cross-sectional area of each flow path of the second outflow path 35 may be the same or larger. Moreover, the cross-sectional areas of the flow paths 32 to 39B may be different from each other.

  The specific arrangement of the flow path of the first fluid A in the main body 3 (specifically, the flow path of the first fluid A from the first inflow path 32 to the first outflow path 33) is not limited. For example, the flow path of the first fluid A is branched by the primary branch path 36 or the like, but may not be branched. Moreover, although the flow path of the first fluid A is arranged symmetrically in the first direction with respect to the reference flow path Ra in each flow path block B1,..., It may be arranged asymmetrically.

  Moreover, although an example of the heat transfer plate 2 was shown on the left side of FIG. 3 and the left side of FIG. 4, the specific configuration (for example, the number, size, position, etc.) of the openings in the heat transfer plate 2 is not limited. .

  DESCRIPTION OF SYMBOLS 1 ... Plate type heat exchanger, 2 ... Heat transfer plate, 20 ... Heat-transfer part, 21 ... Fitting part, 3 ... Main-body part, 30 ... 1st flow path, outer side 1st flow path, inner side 1st flow path, 31 ... 1st Two flow paths, inflow side second flow path, outflow side second flow path, 32 ... first inflow path, 33 ... first outflow path, 34 ... second inflow path, 35 ... second outflow path, 36 ... primary branch path , 37 ... connection path, 38 ... secondary branch path, 39 ... communication path, 39A ... first series path, 39B ... second communication path, 4 ... first end plate, 5 ... second end plate, 40, 50 ... Sealing part, 41, 51 ... fitting part, A ... first fluid (heat exchange medium), B ... second fluid (heat exchange medium), B1 ... first flow path block, B2 ... second flow path block, b1 ... first large block, b2 ... second large block, b11, b21 ... first small block, b12, b22 ... second small block, Ra ... reference flow path Rb ... intermediate reference channel

Claims (4)

A main body having a plurality of stacked heat transfer plates, wherein the main body has a first flow path through which the heat exchange medium flows, a second flow path through which the heat exchange medium flows, and heat to the first flow path. A first inflow path through which the exchange medium flows, a first outflow path through which the heat exchange medium flows out from the first flow path, a second inflow path through which the heat exchange medium flows into the second flow path, and the second flow A second outflow path for allowing the heat exchange medium to flow out of the path, and the plurality of heat transfer plates are arranged in the stacking direction of the heat transfer plates with the heat transfer plate as a boundary. A plate-type heat exchanger that forms a plurality of first channels and a plurality of second channels so that two channels are alternately arranged,
The main body is divided into a first flow path block and a second flow path block , which are a plurality of flow path blocks including at least one first flow path and at least one second flow path, and are included in different flow path blocks. Having a communication path communicating two flow paths,
A plurality of the first inflow paths are provided corresponding to the number of the flow path blocks so that the heat exchange medium can be supplied independently for each flow path block.
The second inflow channel supplies the heat exchange medium to all the channel blocks ,
The communication path is
A second flow path included in the first flow path block and communicating with the second inflow path; and a second flow path included in the second flow path block and the second outflow path. A first series passage communicating with a second flow path communicating with
A second flow path included in the second flow path block and communicating with the second inflow path; and a second flow path included in the first flow path block and the second outflow path. a second flow passage communicating to chromatic and second communication passage for communicating, the a, plate heat exchangers. A main body having a plurality of stacked heat transfer plates, wherein the main body has a first flow path through which the heat exchange medium flows, a second flow path through which the heat exchange medium flows, and heat to the first flow path. A first inflow path through which the exchange medium flows, a first outflow path through which the heat exchange medium flows out from the first flow path, a second inflow path through which the heat exchange medium flows into the second flow path, and the second flow A second outflow path for allowing the heat exchange medium to flow out of the path, and the plurality of heat transfer plates are arranged in the stacking direction of the heat transfer plates with the heat transfer plate as a boundary. A plate-type heat exchanger that forms a plurality of first channels and a plurality of second channels so that two channels are alternately arranged,
The main body portion is divided into a first flow path block, a second flow path block, and a third flow path block , which are a plurality of flow path blocks including at least one first flow path and at least one second flow path, and are different. Having a communication path communicating the second flow paths included in the flow path block;
A plurality of the first inflow paths are provided corresponding to the number of the flow path blocks so that the heat exchange medium can be supplied independently for each flow path block.
The second inflow channel supplies the heat exchange medium to all the channel blocks ,
The communication path is
A second flow path included in the first flow path block and communicating with the second inflow path; and a second flow path included in the second flow path block and the second outflow path. A first series passage communicating with a second flow path communicating with
A second flow path included in the second flow path block, the second flow path communicating with the second inflow path, and a second flow path included in the third flow path block, the second outflow A second communication path communicating with the second flow path communicating with the road;
A second flow path included in the third flow path block, the second flow path communicating with the second flow path, and a second flow path included in the first flow path block, the second flow path. A plate-type heat exchanger having a second communication path communicating with the third communication path communicating with the second flow path . The plate type heat exchanger according to claim 1 or 2 , wherein the number of the first flow path and the second flow path included in each flow path block is the same. Each of the plurality of heat transfer plates has a rectangular shape,
In each flow path block, in the second flow path communicating with the second inflow path, the second fluid flows from one end to the other end in the longitudinal direction of the heat transfer plate, in the second flow passage communicating with the second outlet passage, said second fluid flows toward the one end from the other end in the longitudinal direction, according to any one of claims 1 to 3 Plate heat exchanger.

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