JP6268045B2 - Plate heat exchanger - Google Patents

Description

  The present invention relates to a plate heat exchanger including a main body portion including a plurality of stacked heat transfer plates. Specifically, in the present invention, a plurality of heat transfer plates are stacked so that the first flow path for flowing the first fluid in the main body and the second flow path for flowing the second fluid are the heat transfer plates. It is related with the plate-type heat exchanger arrange | positioned adjacently.

  Conventionally, as a heat exchanger for exchanging heat between the first fluid and the second fluid, as shown in FIG. 9, there is a plate heat exchanger provided with a main body portion 101 including a plurality of stacked heat transfer plates 100. Is provided.

  In this type of plate heat exchanger, the main body 101 has a first flow path 102 through which the first fluid A flows and a second flow path 103 through which the second fluid B flows as shown in FIG. The first flow path 102 and the second flow path 103 are arranged adjacent to each other via the heat transfer plate 100. In general, the first flow path 102 and the second flow path 103 are alternately arranged in the stacking direction (hereinafter simply referred to as the stacking direction) of the plurality of heat transfer plates 100 with the heat transfer plate 100 as a boundary.

  Along with this, the main body 101 is a first inflow path 104 that communicates only with the first flow path 102, and the first inflow path 104 that allows the first fluid A that flows in from the outside to flow into the first flow path 102, A first outflow path 105 that communicates only with one flow path 102, a first outflow path 105 that allows the first fluid A that has flowed in from the first flow path 102 to flow out, and a second inflow path that communicates only with the second flow path 103. 106, a second inflow path 106 that allows the second fluid B flowing in from the outside to flow into the second flow path 103, and a second outflow path 107 that communicates only with the second flow path 103. And a second outflow passage 107 through which the second fluid B flowing in from the passage 103 flows out.

  In this type of plate heat exchanger, the first inflow path 104 and the first outflow path 105 generally extend straight in the stacking direction and communicate with all of the plurality of first flow paths 102. That is, the first inflow passage 104 and the first outflow passage 105 are formed over the entire length of the main body 101 in the stacking direction.

  The first inflow path 104 has an inlet at one end of the main body 101 in the stacking direction, and the first outflow path 105 has an outlet at one end of the main body 101 in the stacking direction. The second inflow channel 106 has an inlet at one end of the main body 101 in the stacking direction, and the second outflow channel 107 has an outlet at one end of the main body 101 in the stacking direction.

  As a result, the first fluid A flows in the order of the first inflow path 104, the first flow path 102, and the first outflow path 105, and the second fluid B flows in the second inflow path 106, the second flow path 103, and the second flow path. It flows in the order of the outflow channel 107. Accordingly, the first fluid A flowing through the first flow path 102 and the second fluid B flowing through the second flow path 103 exchange heat with each other via the heat transfer plate 100.

JP 2005-326074 A

  By the way, in this kind of plate type heat exchanger, when the number of heat transfer plates 100... Stacked increases, the heat transfer area contributing to the heat exchange becomes wider and the heat exchange performance is improved.

  However, when the number of the heat transfer plates 100 increases, the lengths of the first inflow path 104, the first outflow path 105, the second inflow path 106, and the second outflow path 107 extending in the stacking direction are stacked. It becomes long according to the number of plates 100.

  As a result, the flow resistance of the first fluid A in the first inflow path 104 increases, and the first fluid A becomes difficult to flow. Therefore, in this type of plate heat exchanger, the first fluid A flows into the first channel 102 on the inlet side of the first inlet channel 104 and the first channel 102 on the back side of the first inlet channel 104. Inflow of the first fluid A to the first fluid A becomes uneven, and there is a problem that uneven distribution of the first fluid A to the plurality of first flow paths 102 occurs.

  In particular, when the first fluid A is a refrigerant that changes phase (such as a refrigerant that changes state between gas and liquid with heat exchange), the first fluid A is in a gas-liquid mixed state (two-phase state). When supplied to the first inflow path 104, the ratio of a liquid having a large inertia in the first fluid A (a liquid having a specific gravity larger than that of gas) flows into the first flow path 102 communicating with the back side in the first inflow path 104. The ratio of high and low inertia gas in the first fluid A (gas having a specific gravity smaller than that of the liquid) flows into the first flow path 102 communicating with the inlet side of the first inflow path 104 becomes high.

  Therefore, this type of plate heat exchanger has a problem that the heat exchange efficiency differs depending on the position in the stacking direction.

  Therefore, the present invention provides a plate heat exchanger that can supply the first fluid in a homogeneous state to each of the plurality of first flow paths, and can balance the heat exchange in the whole.

  The plate heat exchanger according to the present invention includes a main body portion including a plurality of stacked heat transfer plates, and the main body portion is a plurality of first flow paths through which the first fluid flows, each of which is adjacent to each other. A plurality of first flow paths defined by a heat plate and arranged in the stacking direction of the plurality of heat transfer plates, and a plurality of second flow paths for circulating the second fluid, each defined by adjacent heat transfer plates; A plurality of second flow paths arranged in the stacking direction in a state of being adjacent to the first flow path via a heat transfer plate, and arranged at a midpoint in the stacking direction, serving as a reference for branching the flow path of the first fluid A branch reference channel, at least one branch reference channel defined by adjacent heat transfer plates, and a starting end that extends in the stacking direction and serves as an inlet for the first fluid at one end of the main body in the stacking direction Have Both are first inflow passages having a termination at a middle position in the stacking direction, the first inflow passage communicating with the branch reference flow path, and allowing the first fluid in a gas-liquid mixed state to flow into the branch reference flow path A first outflow path extending in the stacking direction, a first outflow path for allowing the first fluid to flow out from the first flow path, and a second inflow path extending in the stacking direction, wherein the second fluid flows into the second flow path. A second inflow path for inflowing, a second outflow path extending in the laminating direction, a second outflow path for allowing the second fluid to flow out from the second flow path, and a start end respectively communicating with the branch reference flow path. And two or more primary branch flow paths having terminal ends that extend to the other end side of the main body portion in the stacking direction and communicate directly or indirectly with different first flow paths. The first flow path communicating with the end of the Characterized in that through or indirectly communicating.

  According to the plate heat exchanger configured as described above, either the first flow path or the second flow path is disposed with the other of the first flow path or the second flow path interposed therebetween. And the 1st inflow path is connected only to the branch reference | standard flow path in the middle position of the lamination direction of a heat exchanger plate. Accordingly, the first inflow path is formed only up to a midway position in the stacking direction of the heat transfer plates and flows more than the conventional first inflow path formed over the entire length of the main body in the stacking direction of the heat transfer plates. The road length becomes shorter. Thereby, the increase in the pressure loss of the 1st fluid in a 1st inflow path can be suppressed.

  By communicating with the first flow paths having different terminal ends of the primary branch flow paths, two or more flow paths of the first fluid starting from the branch reference flow paths are formed in the main body. Accordingly, the length of the first fluid flow path from the first inflow path to the first outflow path (flow path length per system) is shortened. Thereby, in the plate type heat exchanger of the said structure, the increase in the pressure loss in the whole flow path of a 1st fluid can be suppressed, and high heat exchange performance can be obtained.

  Furthermore, in the plate heat exchanger configured as described above, each of the two or more primary branch channels extends to the other end of the main body in the stacking direction with reference to the same branch reference channel. Even if the supplied first fluid is in a gas-liquid mixed state, the first fluid having a different gas-liquid ratio (ratio of gas to liquid) can be prevented from flowing into each primary branch channel. .

  For example, one of the two or more primary branch channels is formed so as to extend from the branch reference channel to the other end side of the main body, and the remaining primary branch channel is one end side of the main unit from the branch reference channel When the first fluid circulation direction in the primary branch channel extending to the other end of the main body is the same direction as the first fluid circulation direction in the first inflow passage, The flow direction of the first fluid in the primary branch flow path extending to one end of the main body is switched by the branch reference flow path that is the branch position, and is opposite to the flow direction of the first fluid in the first inflow path.

  Accordingly, when the first fluid is supplied to the first inflow path in a gas-liquid mixed state, the first fluid having a different ratio of gas and liquid flows into each primary branch flow path. More specifically, since liquid has a higher specific gravity than gas, it is susceptible to inertial energy during distribution. Therefore, the liquid portion of the first fluid that has flowed into the branch reference flow path tends to go straight due to the influence of inertial energy, and the flow direction of the first fluid is in the same direction as the flow direction of the first fluid in the first flow path. Will actively flow into the primary branch flow path.

  Therefore, the portion of the gas of the first fluid that has flowed into the branch reference channel is a portion of the liquid of the first fluid that flows into the primary branch channel that is in the same direction as the flow direction of the first fluid in the first inlet channel. The flow direction of the first fluid flows into the primary branch flow path that is opposite to the flow direction of the first fluid in the first inflow path. As a result, the first fluid having a different gas-liquid ratio (ratio of gas to liquid) flows into each of the plurality of first flow paths. The heat exchange state with the fluid will be different.

  However, in the plate heat exchanger according to the present invention, each of the two or more primary branch channels extends to the other end side of the main body in the stacking direction with respect to the same branch reference channel ( Therefore, the flow direction of the first fluid in all the primary branch flow paths coincides with the flow direction of the first fluid in the first inflow path.

  As a result, the liquid portion of the first fluid that is going to go straight under the influence of inertial energy flows into all the primary branch flow paths, and the remaining gas portion of the first fluid is also all the primary branch flow paths. Flow into. As a result, since the first fluid (homogeneous first fluid) having the same or substantially the same gas-liquid ratio flows into each of the plurality of first flow paths, the first fluid that circulates in each of the plurality of first flow paths. One fluid and the second fluid flowing through each of the plurality of second flow paths can be heat-exchanged in a balanced manner.

  As one aspect of the present invention, the main body includes a partition section that divides the branch reference flow path into two regions, and the first inflow passage and the two or more primary branch flow passages are formed of the two regions. It may communicate with one of the areas.

  In this way, the area partitioned by the partitioning section is smaller than the size of the entire area that is not partitioned by the partitioning section. Thereby, it can suppress that the gas part of the 1st fluid which flowed in in the gas-liquid mixed state, or the gas which gasified by evaporation of the liquid part accumulates in a branch reference channel, and can improve heat exchange performance. .

  More specifically, the gas portion (gas) of the first fluid has low heat exchange performance with the second fluid. Therefore, when the gas of the first fluid stays in the first flow path, heat exchange with the second fluid is hardly performed in the region where the gas stays, and the heat exchange efficiency tends to decrease.

  However, in the present invention, the first inflow passage and the two or more primary branch flow passages are aggregated and communicated in one region that is smaller than the region that is not partitioned by being partitioned by the partition portion. Therefore, the distance from the first inflow path to each primary branch path can be shortened, and the occupation (retention) of the gas (gas) of the first fluid at the branch position can be suppressed.

  In this case, the one region is preferably smaller than the other region of the two regions.

  According to such a configuration, one region can be suppressed to a size necessary for branching the flow path of the first fluid, and the retention of the gas portion (gas) of the first fluid can be more effectively suppressed. .

  Moreover, it is preferable that the other area | region of said two area | regions comprises either one of a 1st flow path or a 2nd flow path.

  If it does in this way, in the other field divided by a division part, the opportunity to perform heat exchange can be increased and heat exchange efficiency can be raised.

  The present invention can provide an excellent effect that the first fluid can be supplied to each of the plurality of first flow paths in a homogeneous state, and the overall heat exchange can be balanced.

FIG. 1 is an overall perspective view of a plate heat exchanger according to an embodiment of the present invention. FIG. 2 is a schematic exploded perspective view of the plate heat exchanger according to the embodiment. FIG. 3 is a partially enlarged view of FIG. FIG. 4 is a schematic diagram illustrating the flow paths of the first fluid and the second fluid in the plate heat exchanger according to the embodiment. FIG. 5 is a schematic diagram for explaining the flow paths of the first fluid and the second fluid in the plate heat exchanger according to another embodiment of the present invention. Drawing 6 is a mimetic diagram explaining each channel of the 1st fluid and the 2nd fluid in the plate type heat exchanger concerning another embodiment of the present invention. FIG. 7 is a schematic diagram illustrating the flow paths of the first fluid and the second fluid in a plate heat exchanger according to still another embodiment of the present invention. FIG. 8 is a schematic diagram illustrating the flow paths of the first fluid and the second fluid in a plate heat exchanger according to still another embodiment of the present invention. FIG. 9 is a perspective view of a conventional plate heat exchanger. FIG. 10 is a schematic diagram illustrating the flow paths of the first fluid and the second fluid in the conventional plate heat exchanger.

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

  As shown in FIGS. 1 and 2, the plate heat exchanger according to this embodiment includes a main body portion 3 including a plurality of stacked heat transfer plates 2, and a stacking direction of the plurality of heat transfer plates 2. (Hereinafter simply referred to as “stacking direction”) and a pair of end plates 4 and 5 sandwiching the main body 3.

  Each of the plurality of heat transfer plates 2, ... is formed by press-molding a metal plate, and as shown in Fig. 3, a heat transfer section 20 for heat exchange between the first fluid A and the second fluid B, and a heat transfer section 20 is an annular fitting portion 21 along the outer periphery of 20, and includes a fitting portion 21 that can be fitted to the outer periphery of adjacent heat transfer plates 2.

  The heat transfer unit 20 is formed in a rectangular shape and has one surface and the other surface on the back side of the one surface. The heat transfer unit 20 includes a first region 20a having a predetermined range including one end in the longitudinal direction, a second region 20b having a predetermined range including the other end in the longitudinal direction, and the first region 20a and the second region 20b. And an intermediate region 20c.

  The first region 20a of the heat transfer section 20 is provided with a plurality of holes (not numbered) for forming flow paths such as a first inflow path 32 and primary branch flow paths 37a and 37b described later. In contrast, the second region 20b of the heat transfer section 20 has a plurality of holes (not numbered) for forming flow paths such as the first outflow path 33, the second inflow path 34, and the second outflow path 35. Is provided.

  The intermediate region 20c is a region for exchanging heat between the first fluid A and the second fluid B, and has a plurality of recesses and protrusions (not shown) on one surface and the other surface, respectively. The concave stripes and the convex stripes are alternately arranged. In addition, a concave strip and a protrusion are suitably arrange | positioned in the intermediate | middle area | region 20c (heat-transfer part 20) according to the fluid characteristic of the 1st fluid A and the 2nd fluid B. FIG.

  The fitting part 21 is connected to the entire outer periphery of the heat transfer part 20 and extends to one surface side of the heat transfer part 20.

  Each of the plurality of heat transfer plates 2,... Is stacked in a direction intersecting the surface of the heat transfer section 20, so that the protrusions in the heat transfer sections 20 of the adjacent heat transfer plates 2,. The fitting portions 21 of the adjacent heat transfer plates 2,. And the site | part which adjoins the adjacent heat-transfer plate 2, ... is sealed by brazing the several heat-transfer plate 2, ... laminated | stacked.

  Thereby, as shown in FIG. 2 to FIG. 4, the main body 3 is a plurality of first flow paths 30 that circulate the first fluid A, each defined by adjacent heat transfer plates 2. A plurality of first flow paths 30 arranged in the stacking direction and a plurality of second flow paths 31 through which the second fluid B is circulated, each defined by adjacent heat transfer plates 2, 2, A plurality of second flow paths 31 arranged in the stacking direction in a state adjacent to the first flow path 30 through the heat plate 2 are provided. In the present embodiment, the first flow paths 30,... And the second flow paths 31,... Are alternately arranged in the stacking direction with the heat transfer plates 2,.

  Moreover, the main-body part 3 has the flow path formed by the hole provided in the heat-transfer part 20 of heat-transfer plate 2, ... being continued. That is, the main body 3 is a first inflow passage 32 extending in the stacking direction, and has a start end that serves as an inlet for the first fluid A at one end of the main body 3 in the stacking direction, and ends at an intermediate position in the stacking direction. A first inflow passage 32 having a first outflow passage 33 extending in the stacking direction, the first outflow passage 33 allowing the first fluid A to flow out of the first flow passages 30..., And a second inflow passage 34 extending in the stacking direction. A second inflow path 34 for allowing the second fluid B to flow into the second flow paths 31,... And a second outflow path 35 extending in the stacking direction from the second flow paths 31,. And a second outflow passage 35 through which the water flows out.

  In addition to the above-described configuration, the main body 3 is arranged at a midway position in the stacking direction and includes branch reference channels (hereinafter referred to as primary branch reference channels) 36 and 36 that serve as a reference for branching of the flow path of the first fluid A. The primary branch reference flow paths 36, 36 defined by the adjacent heat transfer plates 2,... And the start ends respectively communicating with the primary branch reference flow paths 36, 36, and the main body 3 in the stacking direction. A pair of (two) primary branching channels 37a and 37b having terminal ends that extend to the other end and communicate directly or indirectly with different first channels 30.

  As shown in FIGS. 3 and 4, the first inflow path 32 is formed by connecting holes provided in the first region 20 a of the heat transfer section 20. As a result, the first inflow path 32 extends in the stacking direction within the first region 20 a of the heat transfer section 20 and communicates only with the primary branch reference flow paths 36 and 36.

  The first outflow path 33 is formed by connecting holes provided in the second region 20b of the heat transfer section 20. Thereby, the 1st outflow path 33 is extended in the lamination direction within the 2nd area | region 20b of the heat-transfer part 20, and predetermined | prescribed 1st flow path 30, ... (the 1st fluid A with which several 1st flow path 30, ... was connected). , Which is a flow path, and communicates only with the first flow path 30,..., Which is the most downstream position of the flow path of the first fluid A that connects the first inflow path 32 and the first outflow path 33.

  The second inflow path 34 is formed by connecting holes provided in the second region 20 b of the heat transfer section 20. Thereby, the 2nd outflow path 35 is extended in the lamination direction within the 2nd area | region 20b of the heat-transfer part 20, and the 2nd predetermined | prescribed 2nd flow path 31, ... (the 2nd multiple flow paths 31, ... was connected 2nd. , Which is a flow path of the fluid B, and communicates only with the second flow path 31,...) That is the most upstream position of the flow path of the second fluid B that connects the second inflow path 34 and the second outflow path 35. .

  The second outflow path 35 is formed by connecting holes provided in the second region 20b of the heat transfer section 20. Thereby, the 2nd outflow path 35 is extended in the lamination direction within the 2nd area | region 20b of the heat-transfer part 20, and the 2nd fluid with which predetermined 1st flow path 30, ... (the several 2nd flow path 31, ...) was connected. B), which communicates only with the second flow path 31, which is the most downstream position of the flow path of the second fluid B connecting the second inflow path 34 and the second outflow path 35.

  In the present embodiment, the second inflow path 34 and the second outflow path 35 communicate with different second flow paths 31. Therefore, the main body 3 has a communication path 38 that communicates with all the second flow paths 31.

  The communication path 38 is formed by connecting holes provided in the first region 20 a of the heat transfer section 20. Accordingly, the communication path 38 extends in the stacking direction in the first region 20a of the heat transfer section 20, and communicates with all the second flow paths 31,. Therefore, the second fluid B that has flowed into the predetermined second flow paths 31 from the second inflow path 34 flows into the communication path 38 and then flows into the remaining second flow paths 31,. To 35.

  The primary branch reference flow paths 36 and 36 are arranged at intermediate positions of the main body 3 in the stacking direction. Here, “intermediate position” means an arbitrary position between one end and the other end of the main body 3 in the stacking direction. More specifically, the primary branch reference channels 36, 36 are spaces formed between the adjacent heat transfer plates 2, 2 in the same manner as the first channels 30,. is there. Since the primary branch reference flow paths 36 and 36 are spaces where the first inflow path 32 and the primary branch flow paths 37a and 37b communicate with each other, there may be one primary branch reference flow path. Two paths 36, 36 are provided. That is, the main body 3 according to the present embodiment has two primary branch reference channels 36 and 36 as branch positions of the pair of primary branch channels 37a and 37b.

  The two primary branch reference channels 36 are arranged with either one of the single first channels 30,... Or the single second channel 31,. In the present embodiment, the two primary branch reference channels 36 and 36 are arranged with the first channel 30 interposed therebetween. That is, each of the two primary branch reference flow paths 36, 36 is originally disposed at a position to be the second flow path 31, ... in relation to the first flow path 30, ....

  Accordingly, the main body 3 includes a partition portion 39a that divides the primary branch reference flow path 36, 36 into two regions 36a, 36b, and the first inflow path 32 and the primary branch flow paths 37a, 37b have the primary branch reference. It communicates with one region 36a of the two regions 36a, 36b of the flow paths 36, 36. That is, as described above, the primary branch reference flow paths 36 and 36 are originally disposed at positions that should be the second flow path 31 in relation to the first flow path 30, but are divided into two regions 36 a by the partition portion 39 a. , 36b, one region 36a functions as a space for communicating the first inflow path 32 and the pair of primary branch flow paths 37a, 37b. In the present embodiment, the other region 36b functions as the second flow path 31,.

  In the present embodiment, the partition portion 39a is provided so that one region 36a is smaller than the other region 36b. In the present embodiment, the first inflow channel 32 and the pair of primary branch channels 37a and 37b are aggregated in a predetermined region of the first region 20a, and the partition portion 39a has the first inflow channel 32 and the pair of primary branch channels. It is provided so as to surround the flow paths 37a and 37b. Thereby, one area 36a is made to have a minimum width that allows the first inflow path 32 and the pair of primary branch flow paths 37a, 37b to communicate with each other, and the other area 36b functions as the second flow path 31,. Is made as large as necessary. That is, the other area 36b is secured with the maximum area necessary for heat exchange with the first fluid A.

  In the present embodiment, as described above, as the two primary branch reference channels 36 and 36 are provided, the first inflow channel 32 and the pair of primary branch channels 37a and 37b include the two primary branch reference channels 36. , 36.

  Each of the pair of primary branch flow paths 37 a and 37 b is formed by connecting holes provided in the first region 20 a of the heat transfer section 20. Accordingly, each of the pair of primary branch flow paths 37 a and 37 b extends in the stacking direction within the first region 20 a of the heat transfer unit 20. The start ends of the pair of primary branch flow paths 37a and 37b communicate with the primary branch reference flow paths 36 and 36 (two primary branch reference flow paths 36 and 36). Each terminal end of 37b is connected to different 1st channel 30, ....

  In the present embodiment, the end of each of the pair of primary branch channels 37a, 37b is a channel of the first fluid A in which a plurality of first channels 30,... Are connected as shown in FIG. It communicates with the first flow path 30 (the first flow path 30 that is the starting end) at the most upstream position of the flow path of the first fluid A that connects the flow paths 37a, 37b and the first outflow path 33. That is, the plate type heat exchanger 1 (main body 3) according to the present embodiment is a flow path of the first fluid A connected to one primary branch flow path 37a, and is formed by a plurality of first flow paths 30,. The first fluid BL connected to the first block BL1 including the flow path of the first fluid A and the other primary branch flow path 37b, and formed by a plurality of first flow paths 30,. And a second block BL2 including a flow path of one fluid A.

  The first block BL1 and the second block BL2 are arranged side by side in the stacking direction. The flow path of the first fluid A included in the first block BL1 and the flow path of the first fluid A included in the second block BL2 are configured in the same form. The flow path of the first fluid A included in each of the first block BL1 and the second block BL2 is that the most upstream first flow path 30, ... communicates with the primary branch flow paths 37a, 37b, and the most downstream first flow path. 30,... Communicate with the first outflow passage 33.

  More specifically, the flow path of the first fluid A in each of the first block BL1 and the second block BL2 is a secondary branch reference flow path 40 at a midpoint in the stacking direction, and is a primary branch flow path 37a. , 37b and a pair of secondary branch channels 41a and 41b having a start end communicating with the secondary branch reference channel 40 and opposite to each other in the stacking direction. A pair of secondary branch channels 41a, 41b having terminal ends communicating with different first channels 30, and the first channel 30, with terminal ends of the secondary branch channels 41a, 41b communicating with each other. A pair of tertiary branch channels 42a, 42b extending in directions opposite to each other in the stacking direction and having a terminal end communicating with different first channels 30,. Branch channel 42 , 42b have a starting end that communicates with the first flow path 30 that communicates with the first flow path 30, and the first flow path 30 that communicates with the first end and communicates with the first flow path 30 that is adjacent to the first flow path. The first flow passages 43a, 43b extending in the same direction as the third branch flow passages 42a, 42b communicating with the first flow passages 30,... Communicating with the first flow passages 30,. In this case, the first flow path 33 communicates with the first outflow path 33 and has the first flow paths 30 at the most downstream position of the flow path of the first fluid A in the block.

  The secondary branch reference channel 40 is originally disposed at a position where the second channel 31,... Accordingly, the main body 3 of the present embodiment includes a partition 39b that divides the secondary branch reference channel 40 into two regions 36a and 36b, and the pair of secondary branch channels 41a and 41b includes the secondary branch. The reference channel 40 communicates with one of the two regions 40a and 40b. That is, as described above, the secondary branch reference flow path 40 is originally disposed at a position to be the second flow path 31 in relation to the first flow path 30, but the two regions 40a, By being divided into 40b, one area | region 40a functions as a space which connects a pair of secondary branch flow path 41a, 41b. In the present embodiment, the other region 40b functions as the second flow path 31 that is the original flow path.

  The pair of secondary branch channels 41 a and 41 b are formed by connecting holes provided in the first region 20 a of the heat transfer section 20. Thereby, each of a pair of secondary branch flow path 41a, 41b is extended in the lamination direction within the 1st area | region 20a of the heat-transfer part 20, and the secondary branch reference | standard flow path 40 (one area | region 40a) and the 1st flow path 30. In the present embodiment, the pair of secondary branch channels 41a and 41b are arranged in series with the first inflow channel 32 in the stacking direction.

  The pair of tertiary branch channels 42 a and 42 b are formed by connecting holes provided in the second region 20 b of the heat transfer unit 20. Thereby, each of a pair of tertiary branch flow path 42a, 42b is extended in the lamination direction in the 2nd area | region 20b of the heat-transfer part 20, and makes the adjacent 1st flow paths 30 and 30 connect.

  The first series passages 43 a and 43 b are formed by connecting holes provided in the second region 20 b of the heat transfer section 20. Accordingly, the first series passages 43a and 43b extend in the stacking direction in the second region 20b of the heat transfer section 20, and communicate the adjacent first flow paths 30 and 30 with each other.

  Thereby, the first fluid A that has flowed into the secondary branch reference channel 40 is divided into one end side and the other end side in the stacking direction, and the flow direction in the first channel 30, ... is changed at a predetermined position in the stacking direction, Finally, it flows out to the first outflow passage 33.

  On the other hand, the second fluid B that has flowed into the predetermined second flow paths 31,... From the second flow path 34 flows into the remaining second flow paths 31,. By doing so, it flows out into the second outflow passage 35. As a result, the first fluid A flowing in the first flow paths 30, ... and the second fluid B flowing in the second flow paths 31, ... exchange heat through the heat transfer plates 2,.

  Each of the pair of end plates 4 and 5 includes a main frame portion (not numbered) facing the heat transfer portion 20 of the heat transfer plate 2, and an annular portion (not numbered) extending from the outer periphery of the main frame portion. Is provided. The pair of end plates 4 and 5 sandwich the main body portion 3 from the stacking direction, so that the annular portion fits into the fitting portion 21 of the heat transfer plate 2 while the main frame portion overlaps the heat transfer portion 20. ing. And the position corresponding to the 1st inflow path 32, the 1st outflow path 33, the 2nd inflow path 34, and the 2nd outflow path 35 in the main frame part of one end plate 4 of a pair of end plates 4 and 5 An opening is formed in the. On the other hand, no opening is provided in the main frame portion of the other end plate 5 of the pair of end plates 4 and 5. The pair of end plates 4, 5 are brazed together with the plurality of heat transfer plates 2,.

  As described above, the plate heat exchanger 1 according to this embodiment includes the main body 3 including a plurality of stacked heat transfer plates 2, and the main body 3 circulates the first fluid A. , And a plurality of first flow paths 30, each defined by adjacent heat transfer plates 2, and arranged in the stacking direction of the plurality of heat transfer plates 2,. A plurality of second flow paths 31 through which the fluid B is circulated, each defined by adjacent heat transfer plates 2,... And adjacent to the first flow paths 30 through the heat transfer plates 2,. And a plurality of second flow paths 31 arranged in the stacking direction, and primary branch reference flow paths 36 and 36 that are arranged at intermediate positions in the stacking direction and serve as a reference for branching the flow path of the first fluid A. At least defined by adjacent heat transfer plates 2, ... One primary branch reference channel 36, 36 extending in the stacking direction, having a start end serving as an inlet for the first fluid A at one end of the main body portion 3 in the stacking direction, and having a terminal end in the middle in the stacking direction. A first inflow path 32, which communicates with the primary branch reference flow paths 36, 36, and allows the first fluid A in a gas-liquid mixed state to flow into the primary branch reference flow paths 36, 36; A first outflow passage 33 extending in the direction, a first outflow passage 33 for flowing out the first fluid A from the first flow passages 30,..., And a second inflow passage 34 extending in the stacking direction. Are a second inflow path 34 for allowing the second fluid B to flow into the second outflow path 35 extending in the stacking direction, and a second outflow path 35 for allowing the second fluid B to flow out from the second flow paths 31,. , Each of the leading ends communicating with the primary branch reference flow path 36, 36 And two or more primary branch flow paths 37a and 37b extending to the other end side of the main body 3 in the stacking direction and having a terminal end directly or indirectly communicating with different first flow paths 30,. The first flow passages 30,... Communicated with the terminal ends of the primary branch flow passages 37 a and 37 b communicate directly or indirectly with the first outflow passage 33.

  According to the plate heat exchanger 1 having the above configuration, any one of the first flow path 30,... And the second flow path 31,. Arranged across the other. And the 1st inflow path 32 is connected only to the primary branch reference | standard flow paths 36 and 36 in the middle position of the lamination direction of the heat-transfer plates 2 .... Accordingly, the first inflow path 32 is formed only up to a midpoint in the stacking direction of the heat transfer plates 2... And is formed over the entire length of the main body 3 in the stacking direction of the heat transfer plates 2. The channel length is shorter than the first inflow channel 32. Thereby, an increase in the pressure loss of the first fluid A in the first inflow path 32 can be suppressed.

  The flow path of the first fluid A starting from the primary branch reference flow paths 36, 36 in the main body 3 by communicating with the first flow paths 30,... Having different terminal ends of the primary branch flow paths 37a, 37b. Two or more lines are formed. Therefore, the length of the flow path of the first fluid A from the first inflow path 32 to the first outflow path 33 (the length of the flow path per system) is shortened. Thereby, in the plate type heat exchanger 1 of the said structure, the increase in the pressure loss in the whole flow path of the 1st fluid A can be suppressed, and high heat exchange performance can be obtained.

  Furthermore, each of the two or more primary branch flow paths 37a, 37b extends to the other end side of the main body 3 in the stacking direction with respect to the same primary branch reference flow path 36, 36. Even if the first fluid A is in a gas-liquid mixed state, the first fluid A having a different gas-liquid ratio (ratio of gas to liquid) is prevented from flowing into the primary branch channels 37a and 37b. Can do.

  For example, one of the two or more primary branch channels 37a and 37b is formed to extend from the primary branch reference channels 36 and 36 to the other end side of the main body 3, and the remaining primary branch channels 37a and 37b. Is formed so as to extend from the primary branch reference channels 36, 36 to one end side of the main body 3, the flow direction of the first fluid A in the primary branch channels 37a, 37b extending to the other end of the main body 3 is The flow direction of the first fluid A in the primary branch flow paths 37a and 37b extending to one end side of the main body 3 is the same as the flow direction of the first fluid A in the first inflow path 32. Are switched at the primary branch reference flow paths 36 and 36 and are in the opposite direction to the flow direction of the first fluid A in the first inflow path 32.

  Accordingly, when the first fluid A is supplied to the first inflow passage 32 in a gas-liquid mixed state, the first fluid A having different ratios of gas and liquid flows into the primary branch passages 37a and 37b. End up. More specifically, since liquid has a higher specific gravity than gas, it is susceptible to inertial energy during distribution. Therefore, the liquid portion of the first fluid A that has flowed into the primary branch reference flow paths 36, 36 tends to go straight under the influence of inertial energy, and the flow direction of the first fluid A is the first fluid in the first inlet path 32. It will actively flow into the primary branch flow paths 37a and 37b in the same direction as the flow direction of A.

  Therefore, the portion of the gas of the first fluid A that has flowed into the primary branch reference channels 36 and 36 is directed to the primary branch channels 37a and 37b that are in the same direction as the flow direction of the first fluid A in the first inlet channel 32. Inflow is blocked by the liquid portion of the first fluid A, and the flow direction of the first fluid A is opposite to the flow direction of the first fluid A in the first inflow passage 32. , 37b. As a result, the first fluid A having a different gas-liquid ratio (ratio of gas to liquid) flows into each of the plurality of first flow paths 30,. Therefore, the heat exchange state between the first fluid A and the second fluid B is different.

  However, in the plate heat exchanger 1 according to the present embodiment, each of the two or more primary branch flow paths 37a and 37b is the main body in the stacking direction based on the same primary branch reference flow path 36 and 36. Since it extends to the other end side of the part 3 (extends in the same direction), the flow direction of the first fluid A in all the primary branch flow paths 37a, 37b is the flow of the first fluid A in the first inflow path 32. Match the direction.

  As a result, the liquid portion of the first fluid A, which is going to go straight under the influence of inertial energy, flows into all the primary branch channels 37a, 37b, and all the remaining gas portions of the first fluid A are all. Flow into the primary branch flow paths 37a and 37b. As a result, the first fluid A (homogeneous first fluid A) having the same or substantially the same gas-liquid ratio flows into each of the plurality of first flow paths 30,. ,... Can be heat-exchanged in a well-balanced manner with the first fluid A flowing through each of the plurality of second flow paths 31.

  In the present embodiment, the main body 3 includes a partition portion 39a that divides the primary branch reference channels 36 and 36 into two regions 36a and 36b, and includes the first inflow channel 32 and the two primary branch channels 37a and 37b. Is in communication with one of the two regions 36a and 36b, so that the gas portion of the first fluid A flowing in the gas-liquid mixed state and the liquid portion of the first fluid A are gasses. It can suppress that the gas which turned into the primary branch reference | standard flow paths 36 and 36 accumulates, and can improve heat exchange performance.

  More specifically, the gas (gas) of the first fluid A has low heat exchange performance with the second fluid B. Therefore, when the gas of the first fluid A stays in the first flow path 30, heat exchange with the second fluid B is hardly performed in the region where the gas stays, and the heat exchange efficiency tends to decrease.

  However, in the plate heat exchanger 1 according to the present embodiment, each of the regions 36a and 36b is partitioned by dividing the primary branch reference flow paths 36 and 36 into two regions 36a and 36b by the partitioning portion 39a. Since the first inflow path 32 and the pair of primary branch flow paths 37a and 37b are aggregated and communicated with one area 36a, the first area 36a is connected to the first area 36a. The distance from the one inflow path 32 to each primary branch flow path 37a, 37b becomes short, and the occupation (stagnation) of the gas (gas) of the first fluid A can be suppressed in the primary branch reference flow path 36 (branch position).

  In particular, in the present embodiment, one region 36a is smaller than the other region 36b of the two regions 36a, 36b, and thus one region 36a is necessary for branching the flow path of the first fluid A. The size of the first fluid A can be suppressed more effectively and the retention of the gas (gas) of the first fluid A can be suppressed more effectively.

  Moreover, since the other area | region 36b of the two area | regions 36a and 36b comprises the 2nd flow path 31, ..., the opportunity in heat exchange can be increased using the space in the main-body part 3 effectively. , Heat exchange efficiency can be increased.

  In addition, this invention is not limited to the said embodiment, Of course, it can add suitably in the range which does not deviate from the summary of this invention.

  For example, in the above-described embodiment, the two primary branch reference flow paths 36 and 36 are provided as branch positions of the first inflow path 32, but the present invention is not limited to this. There may be at least one primary branch reference channel 36 for each branch position of the first inflow channel 32. That is, one primary branch reference channel 36, 36 may be provided for each branch position of the first inflow channel 32, or two or more primary branch reference channels 36, 36 may be provided.

  In the above embodiment, a pair (two) of primary branch flow paths 37a and 37b are provided, but the present invention is not limited to this. For example, three or more primary branch channels 37a and 37b may be provided. However, also in this case, each of the three or more primary branch flow paths 37a and 37b has a start end communicating with the primary branch reference flow paths 36 and 36, and on the other end side of the main body 3 in the stacking direction. Of course, it has the termination | terminus extended and connected to different 1st flow paths 30, ....

  In the above embodiment, the pair of secondary branch channels 41a and 41b are formed extending in opposite directions, but the present invention is not limited to this. For example, each of the pair of secondary branch flow paths 41a and 41b has a start end that communicates with the secondary branch reference flow path 40, respectively, in the same manner as the pair of primary branch flow paths 37a and 37b. You may have the termination | terminus which extends in the other end side of the main-body part 3, and communicates directly or indirectly to different 1st flow paths 30, .... Three or more secondary branch channels 41a and 41b may be provided. These points also apply to the tertiary branch flow paths 42a and 42b.

  In the said embodiment, although the main-body part 3 was equipped with the flow path of the 1st flow path 30, ... (it was equipped with 1st block BL1 and 2nd block BL2), it is not limited to this. For example, as shown in FIG. 5, two or more large blocks BL including a first block BL1 and a second block BL2 may be provided. That is, the main body 3 may include two or more channels of the first channels 30.

  5 and 6, two or more branch positions of the first inflow path 32 may be provided, and at least one primary branch reference channel 36 may be disposed at each branch position. In this case, two or more primary branch flow paths 37a, 37b are communicated with the primary branch reference flow paths 36, 36 at each branch position, and each primary branch flow path 37a, 37b is connected to the corresponding large block BL,. The first block BL1 and the second block BL2 may be communicated with the most upstream flow path of the first fluid A.

  Further, as shown in FIG. 5, the single first inflow passage 32 may be communicated with the primary branch reference flow paths 36 and 36 at the two branch positions, or as shown in FIG. Two or more first inflow channels 32 and 32 may be provided corresponding to each of the primary branch reference channels 36 and 36 in position.

  Further, when the main body 3 includes two or more large blocks BL including the first block BL1 and the second block BL2, as shown in FIG. 7, the first inflow passage 32 is provided at one position in the middle of the stacking direction. Each primary branch flow is provided on the assumption that primary branch reference flow paths 36 and 36 serving as branch positions are provided and two or more primary branch flow paths 37a and 37b communicate with the primary branch reference flow paths 36 and 36. A branch reference channel 44 is provided at a position communicating with the terminal ends of the paths 37a and 37b, and two or more branch channels 45a and 45b are communicated with the branch reference channel 44. Each of 45a, 45b may be communicated with a flow path (uppermost stream) of the first fluid A in each of the first block BL1 and the second block BL2 in the large block BL,.

  Further, when the main body 3 includes two or more large blocks BL including the first block BL1 and the second block BL2, as shown in FIG. An exit path 33 may be provided. That is, when the main body portion 3 includes two or more large blocks BL,..., The first inflow path 32 and the first outflow path 33 are configured so that the first fluid A can flow in and out for each large block BL,. The large blocks BL may be provided in units.

  In the above embodiment, the flow path of the first fluid A from the primary branch flow paths 37a, 37b to the first outflow path 33 is the secondary branch reference flow path 40, the pair of secondary branch flow paths 41a, 41b, the first flow path. 30... Are provided with a pair of tertiary branch flow paths 42a and 42b and first series passages 43a and 43b, but is not limited thereto. The flow path of the first fluid A from the primary branch flow paths 37a, 37b to the first outflow path 33 (how to connect the first flow paths 30,...) Can be changed as appropriate.

  In the above-described embodiment, the main body 3 includes a partition portion 39a that partitions the primary branch reference channel 36, 36 into two regions 36a, 36b, and the first inlet channel 32 and the primary branch channel 37a, Although 37b was connected and the other area | region 36b was made into the 2nd flow path 31, it is not limited to this. For example, the main body 3 includes a partition 39a that partitions the primary branch reference channels 36 and 36 into two regions 36a and 36b, and the first inflow channel 32 and the primary branch channels 37a and 37b communicate with one region 36a. The other region 36b may be the first flow path 30 (a part of the flow path of the first fluid A). 5 to 6 show a plate heat exchanger 1 according to another embodiment different from the above embodiment, in which the branch position (reference position) is originally the second flow path 31,. Although it should be, it may of course be at the position where the first flow path 30,.

  In the above-described embodiment, the main body 3 includes the partition part 39a that partitions the primary branch reference channel 36, 36 into two regions 36a, 36b, but is not limited thereto. For example, a single flow path may be configured without partitioning the inside of the primary branch reference flow paths 36 and 36. In addition, since the gas part of the 1st fluid A may retain if the flow path length (length of the heat transfer part 20 in the longitudinal direction) of the primary branch reference flow paths 36, 36 is long, the first inflow path 32 and the primary branch flow paths 37a and 37b are preferably set to a minimum area where the area can be secured.

  In the said embodiment, although the 1st flow path 30 ... and the 2nd flow path 31, ... are arrange | positioned alternately one by one on the boundary of the heat-transfer plate 2, ..., it is not limited to this. For example, two first flow paths 30,... May be arranged adjacent to each other between two second flow paths 31,. Moreover, each of the 1st flow path 30, ... and the 2nd flow paths 31, ... may be alternately arrange | positioned 2 each. That is, the second flow paths 31,... Need only be arranged on at least one side of the first flow paths 30,.

  DESCRIPTION OF SYMBOLS 1 ... Plate type heat exchanger, 2 ... Heat transfer plate, 3 ... Main part, 4 ... End plate, 5 ... End plate, 20 ... Heat transfer part, 20a ... 1st area | region, 20b ... 2nd area | region, 20c ... Middle Region 21, fitting portion 30, first flow path 31, second flow path 32, first inflow path 33, first outflow path 34, second inflow path 35, second outflow path 36, Primary branch reference channel (branch reference channel), 36a ... one region, 36b ... the other region, 37a, 37b ... primary branch channel, 38 ... communication channel, 39a ... partition section, 39b ... partition section, 40 ... Secondary branch reference channel, 40a ... one region, 40b ... the other region, 41a, 41b ... secondary branch channel, 42a, 42b ... tertiary branch channel, 43a, 43b ... first series passage, 44 ... branch Reference channel, 45a, 45b ... branch channel, A ... first fluid, B ... second fluid, BL Large block, BL1 ... first block, BL2 ... the second block

Claims (4)

  A main body portion including a plurality of heat transfer plates stacked, the main body portions are a plurality of first flow paths for circulating the first fluid, each defined by adjacent heat transfer plates, and the plurality of heat transfer plates A plurality of first flow paths arranged in the stacking direction and a plurality of second flow paths through which the second fluid flows, each defined by adjacent heat transfer plates and adjacent to the first flow paths via the heat transfer plates. A plurality of second flow paths arranged in the stacking direction in a combined state, and a branch reference flow path that is arranged at a midpoint in the stacking direction and serves as a reference for branching of the flow path of the first fluid. At least one branch reference channel defined by a heat plate, and extending in the laminating direction, having a start end serving as an inlet for the first fluid at one end of the main body in the laminating direction, and in the middle in the laminating direction A first inflow passage having a terminal end, communicated with the branch reference flow path, and extending in the stacking direction, and a first inflow path through which the first fluid in a gas-liquid mixed state flows into the branch reference flow path A first outflow path, which is a first outflow path that allows the first fluid to flow out from the first flow path, and a second inflow path that extends in the stacking direction and that allows the second fluid to flow into the second flow path. And a second outflow path extending in the stacking direction, the second outflow path for allowing the second fluid to flow out from the second flow path, and a start end respectively communicating with the branch reference flow path, and in the stacking direction Two or more primary branch flow paths extending to the other end side of the main body portion and having direct or indirect communication with different first flow paths, and a first flow communicating with the end of the primary branch flow path The road is in direct or indirect communication with the first outflow Plate heat exchanger according to symptoms.   The main body includes a partition section that divides the branch reference channel into two regions, and the first inflow channel and the two or more primary branch channels communicate with one of the two regions. The plate heat exchanger according to claim 1.   The plate type heat exchanger according to claim 2, wherein the one area is smaller than the other area of the two areas.   The plate type heat exchanger according to claim 2 or 3, wherein the other of the two regions constitutes one of a first flow path and a second flow path.

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