WO2020045595A1 - Plate heat exchanger - Google Patents

Abstract

The present invention provides a plate heat exchanger that can obtain a high heat transferability while preventing increased flow resistance of a fluid. The plate heat exchanger comprises a plurality of heat transfer plates that include heat transfer regions. A first channel, in which a first fluid flows in a second direction orthogonal to a first direction, and a second channel, in which a second fluid flows in the second direction, are formed to alternate in the first direction with the heat transfer plates serving as boundaries. The heat transfer regions have a plurality of recess and protrusion groups each of which includes protrusions and recesses that stretch in a direction slanted with respect to the centerline of same extending in the second direction and are arranged alternately along a virtual line extending in the direction that the protrusions and recesses are slanted, said plurality of recess and protrusion groups being arranged orthogonal to the slanted direction. Protrusions in a recess and protrusion group are disposed side by side with recesses in an adjacent recess and protrusion group. Recesses in a recess and protrusion group are disposed side by side with protrusions in an adjacent recess and protrusion group. Protrusions of a recess and protrusion group of adjacent heat transfer plates intersect and abut each other.

Description

Plate heat exchanger Cross-reference of related applications

This application claims the priority of Japanese Patent Application No. 2018-160542 filed on Aug. 29, 2018, which is incorporated by reference.

The present invention relates to a plate heat exchanger for exchanging heat between a first fluid and a second fluid.

プ レ ー ト Conventionally, a plate heat exchanger for exchanging heat between a first fluid and a second fluid has been provided. The plate heat exchanger is a heat transfer plate including heat transfer regions on both surfaces in the first direction, and includes a plurality of heat transfer plates in which the respective heat transfer regions are overlapped in the first direction (for example, Patent Document 1). 1).

Each of the heat transfer regions of the plurality of heat transfer plates has a plurality of protrusions extending continuously in a direction inclined with respect to its own center line (hereinafter, referred to as a vertical center line) extending in a second direction orthogonal to the first direction. Includes ridges and valleys. In the heat transfer region, the ridges and the ridges are alternately arranged in a direction orthogonal to a direction in which the ridges extend. The heat transfer plate is generally manufactured by press-molding a metal plate. Therefore, the ridges of the heat transfer region on one surface and the ridges of the heat transfer region on the other surface are in a front-to-back relationship, and the ridge of the heat transfer region on one surface and the heat transfer region on the other surface. Has a front-to-back relationship.

In this type of plate heat exchanger, the plurality of heat transfer plates are in a state in which the heat transfer regions are overlapped in the first direction, and the ridges of the adjacent heat transfer plates (heat transfer regions) are latticed. It is arranged in a shape. That is, the plurality of heat transfer plates are arranged such that the ridges of the adjacent heat transfer plates (heat transfer regions) are in a state of crossing abutment.

Thereby, in this type of plate heat exchanger, the first flow path for flowing the first fluid in the second direction, and the second flow path for flowing the second fluid in the second direction, each heat transfer plate The first fluid flowing in the first flow path and the second fluid flowing in the second flow path are heat-exchanged via the heat transfer plate.

By the way, in this type of plate heat exchanger, the ridges and recesses in the heat transfer region of the heat transfer plate extend continuously in a direction inclined with respect to the vertical center line. The flow resistance of the first fluid and the second fluid and the heat exchange performance (heat transfer performance) between the first fluid and the second fluid differ depending on the direction in which the concave stripe extends (the inclination angle with respect to the vertical center line).

More specifically, when the inclination angle of the ridge and the ridge with respect to the vertical center line is large (the center line of the heat transfer region extending in the third direction orthogonal to the first direction and the second direction (hereinafter referred to as the horizontal center line) ), Each of the plurality of ridges extends in a direction in which the component of the flow direction of the fluid (first fluid, second fluid) is small (the ridges are in the flow direction of the fluid). Is arranged so that it crosses). Therefore, each of the first fluid and the second fluid tends to flow in the flow path (the first flow path or the second flow path) in the second direction while repeatedly climbing over the plurality of ridges. As a result, the respective flows of the first fluid and the second fluid are disturbed, and high heat transfer performance is obtained, but the pressure loss (flow resistance) in each of the first flow path and the second flow path is extremely large. turn into.

On the other hand, when the inclination angles of the ridges and the recesses with respect to the vertical center line are small (when the inclination angles of the ridges and the recesses with respect to the horizontal center line are large), each of the plurality of ridges is fluid (the first fluid, It extends in the direction in which the component of the direction of flow of the second fluid) is large (the ridges are arranged so as to follow the flow direction of the fluid). Therefore, each of the first fluid and the second fluid tries to circulate in the second direction without largely climbing over the ridge. As a result, the pressure loss (flow resistance) in each of the first flow path and the second flow path is reduced, but the flow of the first fluid and the second fluid is less likely to be disturbed, and high heat transfer performance is obtained. Can not be.

Japanese Patent Application Laid-Open No. 2014-85044

Therefore, an object of the present invention is to provide a plate heat exchanger that can achieve high heat transfer performance while suppressing an increase in fluid flow resistance.

The plate heat exchanger according to the present invention is a heat transfer plate including heat transfer regions on both surfaces in the first direction, including a plurality of heat transfer plates each heat transfer region is overlapped in the first direction, A first flow path that allows the first fluid to flow in a second direction orthogonal to the first direction, and a second flow path that allows the second fluid to flow in the second direction, with each of the plurality of heat transfer plates as a boundary. The heat transfer region is formed alternately in the first direction, and includes a convex portion and a concave portion having a length in a direction inclined with respect to its own center line extending in the second direction, and the convex portion and the concave portion are in the inclined direction. A plurality of concavo-convex groups alternately arranged along a virtual line extending in the direction in which the plurality of concavo-convex groups are arranged in a direction orthogonal to the direction of inclination. It is arranged side by side with the concave part of the concavo-convex group adjacent in the direction orthogonal to The concave portions of the plurality of concave / convex groups are arranged side by side with the convex portions of the concave / convex groups adjacent in the direction orthogonal to the inclined direction, and the heat transfer plates adjacent to each other with the heat transfer regions facing each other. Is characterized in that the protruding portions of the concavo-convex groups are cross-imputed with each other.

According to the above configuration, each of the protrusions and recesses of the plurality of unevenness groups on the heat transfer plate (heat transfer region) is arranged in a staggered manner. That is, the plurality of convex portions are arranged in a staggered manner in the heat transfer region, and the plurality of concave portions are arranged in a staggered manner avoiding the plurality of convex portions in the heat transfer region.

Thereby, when flowing the first fluid in the second direction in the first flow path, the first fluid flows along the concave portion in the heat transfer plate (heat transfer region) that defines the first flow path, and is adjacent on the downstream side of the concave portion. It collides with a convex part (a convex part of a common unevenness group). Then, the flow of the first fluid changes, and the first fluid transfers to the peripheral concave portions (for example, concave portions of the concave and convex groups on both sides, concave portions of the concave and convex groups of the counterpart heat transfer plate, and the like) and flows along the concave portions. As described above, the first fluid flows downstream while repeating the flow along the concave portion and the collision with the convex portion.

When the second fluid flows in the second direction in the second flow path, the second fluid flows along a concave portion in the heat transfer plate (heat transfer region) defining the second flow path, and is adjacent to the downstream side of the concave portion. It collides with a matching convex part (a convex part of a common unevenness group). Then, the flow of the second fluid changes, and the second fluid transfers to the peripheral concave portions (for example, concave portions of the concave and convex groups on both sides, concave portions of the concave and convex groups of the counterpart heat transfer plate) and flows along the concave portions. As described above, the second fluid flows downstream while repeating the flow along the concave portion and the collision with the convex portion.

As described above, since each of the first fluid and the second fluid flows along the concave portion in the heat transfer region that defines the flow path (the first flow path or the second flow path), the plate heat exchanger having the above configuration is used. Thus, an increase in distribution resistance can be suppressed. In addition, since each of the first fluid and the second fluid collides with the convex portion of the concave / convex group including the concave portion, in the plate heat exchanger having the above configuration, the respective flows of the first fluid and the second fluid are disturbed. This results in high heat transfer performance.

As one embodiment of the present invention, each of the protrusions of the plurality of unevenness groups in the heat transfer area of the heat transfer plate is one of the plurality of unevenness groups in the heat transfer area of the partner heat transfer plate adjacent in the first direction. May be cross-impacted with the projections of at least two uneven groups.

With this configuration, the first fluid that collides with the convex portion is guided to the concave portions of the concave / convex group on both sides of the concave / convex group including the convex portion, and the second fluid that collides with the convex portion includes the concave / convex group including the convex portion. Are guided to the concave portions of the concave and convex groups on both sides of the concave portion.

More specifically, since the plurality of uneven groups in the common heat transfer region are arranged in a direction orthogonal to the direction inclined with respect to the center line (the direction in which the imaginary line extends), the protrusions of the different uneven groups are different. Are arranged at different positions in a direction orthogonal to the direction in which the unevenness group extends (the direction inclined with respect to the center line). That is, the protrusions of the different concavo-convex groups are arranged at intervals in a direction orthogonal to the direction of inclination (the direction in which the imaginary line extends).

Therefore, for each of the plurality of protrusions of the plurality of unevennesses in the heat transfer region of the heat transfer plate, at least two protrusions (of different unevenness (Convex part) cross-collides.

That is, the projections of the mating heat transfer plate (projections of different projections and depressions) cross-impact with each end of or near the projections of the projections and depressions of the plurality of projections and depressions in the heat transfer region of the heat transfer plate. .

Thereby, even if the first fluid colliding with the convex portion attempts to flow to the heat transfer plate side of the counterpart, the first fluid is blocked by the convex portion of the counterpart heat transfer plate. Is guided (branched) to the concaves of the concavo-convex group located in, and flows along the concaves. Then, the first fluid flowing along the concave portion collides with a convex portion adjacent to the concave portion.

Then, the first fluid also tends to flow to the heat transfer plate side of the counterpart, but is blocked by the protrusions of the counterpart heat transfer plate, and consequently the first fluid is on both sides of the group of protrusions and protrusions including the hitting protrusions. It is guided (branched) to the concave portions of the concave / convex group. That is, it is guided (merged) to the concave portions included in the original concave-convex group. As a result, the first fluid repeats branching and merging by collision with the convex portion, and flows to the downstream side. This flow (the flow in which branching and merging are repeated by collision with the convex portion) is the same for the second fluid.

As described above, the first fluid has an opportunity to flow through the concave portion in the first flow channel, and the second fluid has an opportunity to flow through the concave portion in the second flow channel, so that the flow resistance in each flow channel is suppressed from increasing. You. In addition, the first fluid repeats branching and merging in the first flow path, and the second fluid repeats branching and merging in the second flow path, whereby turbulence occurs in the respective flows of the first fluid and the second fluid. As a result, the heat exchange performance (heat transfer performance) between the first fluid and the second fluid increases.

As another aspect of the present invention, each of the protrusions of the plurality of unevenness groups in the heat transfer area of the heat transfer plate is one of the plurality of unevenness groups in the heat transfer area of the partner heat transfer plate adjacent in the first direction. May be cross-impacted with one convex part of one concave-convex group.

With this configuration, the first fluid that collides with the convex portion is guided to the concave portion of the concave / convex group of the other heat transfer plate with respect to the heat transfer plate having the concave / convex group including the convex portion, and collides with the convex portion. The two fluids are guided to the concave portion of the concavity and convexity group of the other heat transfer plate with respect to the heat transfer plate having the concavo-convex group including the convex portion.

Specifically, the plurality of uneven groups in the common heat transfer region are arranged in a direction orthogonal to the direction inclined with respect to the center line (the direction in which the virtual line extends). The projections are arranged at different positions in a direction orthogonal to the direction in which the group of irregularities extend (the direction in which the imaginary line extends). That is, the protrusions of the different concavo-convex groups are arranged at intervals in a direction orthogonal to the direction in which the virtual line extends. Accordingly, each of the protrusions included in the concavo-convex group intersects with one of the concavo-convex groups of a different heat transfer plate of the partner. Accordingly, the convex portions of the adjacent heat transfer plates cross each other, and the concave portions of the adjacent heat transfer plates cross each other at an interval.

Accordingly, when the first fluid flowing along the concave portion collides with the convex portion to change the flow, the concave portion of the counterpart heat transfer plate (the concave portion intersecting with the concave portion arranged side by side with the convex portion against which the first fluid collides). ) And flows along the concave portion of the other heat transfer plate. Then, when the first fluid flowing along the concave portion of the counterpart heat transfer plate attempts to change the flow by colliding with the convex portion of the counterpart heat transfer plate, the concave portion of the original heat transfer plate (the first fluid collides). (A concave portion intersecting with a concave portion that is arranged side by side with the convex portion), and flows along the concave portion of the original heat transfer plate. In this way, the first fluid flows downstream while sequentially moving over the concave portions of the adjacent heat transfer plates.

In the plate heat exchanger having the above-described configuration, the concavo-convex group (the convex portion and the concave portion) is along a virtual line that is inclined with respect to a center line extending in the second direction (extending in the flow direction of the first fluid). As described above, the first fluid flows downstream while sequentially passing through the recesses of the adjacent heat transfer plates, so that the flow of the first fluid becomes a spiral flow. Become. This flow (spiral flow) is the same for the second fluid.

As described above, the first fluid has an opportunity to flow through the concave portion in the first flow channel, and the second fluid has an opportunity to flow through the concave portion in the second flow channel, so that the flow resistance in each flow channel is suppressed from increasing. You. In addition, the first fluid creates a helical flow in the first flow path, and the second fluid creates a helical flow in the second flow path, resulting in further turbulence in the respective flows of the first fluid and the second fluid. The heat exchange performance (heat transfer performance) between the first fluid and the second fluid via the heat transfer plate (heat transfer region) is improved.

In these cases, it is preferable that the imaginary line serving as a reference for the arrangement of the unevenness group is inclined at an angle of less than 45 ° with respect to the center line extending in the second direction. With this configuration, the components in the direction extending in the longitudinal direction of the concave portion included in the concave and convex group include more components in the flow direction than components perpendicular to the flow direction of the first fluid and the second fluid. Thereby, the first fluid easily flows in the first flow path, and the second fluid easily flows in the second flow path. That is, in each of the first flow path and the second flow path, an increase in flow resistance is suppressed.

According to the plate heat exchanger of the present invention, an excellent effect that high heat transfer performance can be obtained while suppressing an increase in fluid flow resistance can be achieved.

FIG. 1 is an overall perspective view of the plate heat exchanger according to the first embodiment of the present invention. FIG. 2 is a schematic exploded perspective view of the plate heat exchanger according to the first embodiment. FIG. 3 is a front view of the first heat transfer plate in the plate heat exchanger according to the first embodiment. FIG. 4 is a rear view of the first heat transfer plate in the plate heat exchanger according to the first embodiment. FIG. 5 is a front view of a second heat transfer plate in the plate heat exchanger according to the first embodiment. FIG. 6 is a rear view of the second heat transfer plate in the plate heat exchanger according to the first embodiment. FIG. 7 is a diagram for explaining the flow of the first fluid in the first flow path in the plate heat exchanger according to the first embodiment. FIG. 8 is a diagram for explaining the flow of the second fluid in the second flow path in the plate heat exchanger according to the first embodiment. FIG. 9 is a diagram for explaining the flow of the first fluid in a partial region of the first flow path in the plate heat exchanger according to the first embodiment. FIG. 10 is a diagram for explaining the flow of the second fluid in a partial region of the second flow path in the plate heat exchanger according to the first embodiment. FIG. 11 is an overall perspective view of the plate heat exchanger according to the second embodiment of the present invention. FIG. 12 is a schematic exploded perspective view of the plate heat exchanger according to the second embodiment. FIG. 13 is a front view of the first heat transfer plate in the plate heat exchanger according to the second embodiment. FIG. 14 is a rear view of the first heat transfer plate in the plate heat exchanger according to the second embodiment. FIG. 15 is a front view of a second heat transfer plate in the plate heat exchanger according to the second embodiment. FIG. 16 is a rear view of the second heat transfer plate in the plate heat exchanger according to the second embodiment. Drawing 17 is a figure for explaining the flow of the 1st fluid in the 1st channel in the plate type heat exchanger concerning a second embodiment. FIG. 18 is a diagram for explaining the flow of the second fluid in the second flow path in the plate heat exchanger according to the second embodiment. FIG. 19 is a diagram for explaining the flow of the first fluid in a partial region of the first flow path in the plate heat exchanger according to the second embodiment. FIG. 20 is a diagram for explaining the flow of the second fluid in a partial region of the second flow path in the plate heat exchanger according to the second embodiment. FIG. 21 is a diagram for explaining the flow of the first fluid in a partial region of the first flow path in the plate heat exchanger according to another embodiment of the present invention. FIG. 22 is a diagram for explaining the flow of the second fluid in a partial region of the second flow path in the plate heat exchanger according to the embodiment.

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

As shown in FIG. 1, the plate-type heat exchanger exchanges heat between the first fluid A and the second fluid B, and includes a plurality of heat transfer plates 2 and 3 stacked in the first direction.

In the following description, a first direction is defined as an X-axis direction, a second direction orthogonal to the first direction is defined as a Z-axis direction, and a third direction orthogonal to each of the first direction and the second direction is defined as a Y-axis direction. And Accordingly, in each drawing, three orthogonal axes (X-axis corresponding to the X-axis direction, Y-axis corresponding to the Y-axis direction, and Z-axis corresponding to the Z-axis direction) are supplementarily illustrated in each drawing. It is illustrated.

In the plate heat exchanger 1 according to the present embodiment, as shown in FIG. 2, a first flow path Ra that allows the first fluid A to flow in the Z-axis direction with each of the plurality of heat transfer plates 2 and 3 as a boundary. And a second flow path Rb for flowing the second fluid B in the Z-axis direction are formed alternately in the X-axis direction.

As shown in FIGS. 3 to 6, each of the plurality of heat transfer plates 2 and 3 includes heat transfer regions 200a, 200b, 300a and 300b on both surfaces S1 and S2 in the X-axis direction. More specifically, each of the plurality of heat transfer plates 2 and 3 includes a heat transfer unit 20 or 30 having a first surface S1 and a second surface S2 opposite to the first surface S1 in the X-axis direction. , And annular portions 21 and 31 extending from the entire outer periphery of the heat transfer units 20 and 30.

第一 The first surface S1 and the second surface S2 of the heat transfer units 20, 30 include heat transfer regions 200a, 200b, 300a, 300b that contribute to heat exchange between the first fluid A and the second fluid B. More specifically, the heat transfer units 20 and 30 are formed in a square shape when viewed from the X-axis direction. In the present embodiment, the heat transfer units 20 and 30 are formed in a rectangular shape that is elongated in the Z-axis direction when viewed from the X-axis direction. The heat transfer units 20 and 30 mainly include an intersection of a center line (hereinafter, referred to as a vertical center line) CL1 extending in the Z-axis direction and a center line (hereinafter, referred to as horizontal center line) CL2 extending in the Y-axis direction. Heat transfer portions 20a, 30a and a pair of ends 20b, 30b on both sides of the main heat transfer portions 20a, 30a in the Z-axis direction are included.

The main heat transfer sections 20a and 30a are formed in a square shape when viewed from the X-axis direction. In the present embodiment, the main heat transfer sections 20a and 30a are formed in a rectangular shape having a length in the Z-axis direction. The pair of ends 20b and 30b are continuous with the main heat transfer sections 20a and 30a, and form the entire heat transfer sections 20 and 30 in a square shape (rectangular shape) when viewed from the X-axis direction.

第一 The first surface S1 and the second surface S2 of the main heat transfer portions 20a, 30a of the heat transfer portions 20, 30 are heat transfer regions 200a, 200b, 300a, 300b. Each of the heat transfer regions 200a, 200b, 300a, 300b of the first surface S1 and the second surface S2 has a convex portion 201a, 202a having a length in a direction inclined with respect to the vertical center line CL1 (hereinafter referred to as an inclined direction). , 301a, 302a and concave portions 201b, 202b, 301b, 302b, and the convex portions 201a, 202a, 301a, 302a and concave portions 201b, 202b, 301b, 302b are alternately arranged along an imaginary line VL extending in the inclined direction. Groups 201, 202, 301, and 302 include a plurality of uneven groups 201, 202, 301, and 302 arranged in a direction orthogonal to the tilt direction.

Each of the convex portions 201a, 202a, 301a, 302a of the plurality of concave / convex groups 201, 202, 301, 302 is formed with concave portions 201b, 202b, 301b of the concave / convex groups 201, 202, 301, 302 adjacent in the direction orthogonal to the inclination direction. , 302b. On the other hand, each of the concave portions 201b, 202b, 301b, and 302b of the plurality of concave / convex groups 201, 202, 301, and 302 has a convex portion 201a of the concave / convex groups 201, 202, 301, and 302 that are adjacent to each other in a direction orthogonal to the inclination direction. , 202a, 301a, and 302a.

As a result, the convex portions 201a, 202a, 301a, and 302a of the plurality of rows of unevenness groups 201, 202, 301, and 302 are arranged in a staggered manner within the heat transfer regions 200a, 200b, 300a, and 300b. The concave portions 201b, 202b, 301b, and 302b of 201, 202, 301, and 302 are arranged between the convex portions 201a, 202a, 301a, and 302a in the heat transfer regions 200a, 200b, 300a, and 300b. , 200b, 300a, and 300b in a zigzag pattern.

More specifically, in the present embodiment, each of the convex portions 201a, 202a, 301a, and 302a of the plurality of concave and convex groups 201, 202, 301, and 302 is formed with the concave portion 201b of the adjacent concave and convex groups 201, 202, 301, and 302. , 202b, 301b, 302b in the Y-axis direction. On the other hand, each of the concave portions 201b, 202b, 301b, and 302b of the plurality of concave / convex groups 201, 202, 301, and 302 is different from the convex portions 201a, 202a, 301a, and 302a of the adjacent concave / convex groups 201, 202, 301, and 302. They are arranged side by side in the Y-axis direction.

Thereby, a plurality of groups (rows) in which the convex portions 201a, 202a, 301a, 302a and the concave portions 201b, 202b, 301b, 302b of the different concavo- convex groups 201, 202, 301, 302 are alternately arranged in the Y-axis direction are formed. , In the Z-axis direction.

The inclination direction is set to a direction inclined at an angle of less than 45 ° with respect to the vertical center line CL1. Accordingly, the inclination angle θ1 of the virtual line VL with respect to the vertical center line CL1 is set to less than 45 °. That is, the inclination angle θ2 of the virtual line VL with respect to the horizontal center line CL2 is set to be larger than 45 °. In the present embodiment, the inclination angle θ1 of the virtual line VL with respect to the vertical center line CL1 is set to 30 ° to 40 °. In the present embodiment, the inclination angle θ2 of the virtual line VL with respect to the horizontal center line CL2 is set to 60 ° to 70 °.

Thus, the plurality of heat transfer plates 2 and 3 are stacked with the heat transfer portions 20 and 30 ( heat transfer regions 200a, 200b, 300a and 300b) facing each other, so that the adjacent heat transfer plates 2 and 3 are stacked. The projections 201a, 202a, 301a, and 302a of the three concavo- convex groups 201, 202, 301, and 302 cross each other.

Here, the longitudinal lengths of the convex portions 201a, 202a, 301a, 302a and the longitudinal lengths of the concave portions 201b, 202b, 301b, 302b included in each of the concavo- convex groups 201, 202, 301, 302 (virtual line VL (The intervals between the convex portions 201a, 202a, 301a, and 302a) arranged in the extending direction of the heat transfer plates 200, 300a, 202a, 301a, and 302a. The projections 201a, 202a, 301a, and 200b of the two or more concavo- convex groups 201, 202, 301, and 302 include two (two rows) or more concavities and convexities 201, 202, 301, and 302 included in 200b, 300a, and 300b. 302a).

The projections 201a, 202a, 301a, 302a (tops of the projections 201a, 202a, 301a, 302a) and the recesses 201b, 202b, 301b, 302b (bottoms of the recesses 201b, 202b, 301b, 302b) in the X-axis direction Different position. Therefore, between the convex portions 201a, 202a, 301a, 302a and the concave portions 201b, 202b, 301b, 302b, the bottoms of the concave portions 201b, 202b, 301b, 302b (from the top of the convex portions 201a, 202a, 301a, 302a). An intermediate region (not numbered) is formed from the bottom of the recesses 201b, 202b, 301b, 302b to the top of the protrusions 201a, 202a, 301a, 302a).

This intermediate region is located between the convex portions 201a, 202a, 301a, 302a and the concave portions 201b, 202b, 301b, 302b in the concave / convex groups 201, 202, 301, 302, and the adjacent concave / convex groups 201, 202, 301, 302. Are disposed between the convex portions 201a, 202a, 301a, 302a and the concave portions 201b, 202b, 301b, 302b.

The intermediate region may include a middle portion that extends in the Z-axis direction and the Y-axis direction at an intermediate position between the tops of the protrusions 201a, 202a, 301a, and 302a and the bottoms of the recesses 201b, 202b, 301b, and 302b. In the present embodiment, from the top of the projections 201a, 202a, 301a, 302a to the bottom of the depressions 201b, 202b, 301b, 302b (or from the bottom of the depressions 201b, 202b, 301b, 302b, the projections 201a, 202a). , 301a, 302a).

A pair of through holes 203, 204, 303, 304 penetrating in the X-axis direction are provided in each of the pair of ends 20b, 30b. In each of the pair of ends 20b and 30b, the pair of through holes 203, 204, 303 and 304 are arranged at intervals in the Y-axis direction. In the present embodiment, the pair of through holes 203, 204, 303, 304 are arranged with the vertical center line CL1 interposed therebetween.

In the present embodiment, each of the plurality of heat transfer plates 2 and 3 is formed by press-molding a metal plate. Accordingly, in each of the heat transfer plates 2 and 3, the convex portions 201a and 301a of the heat transfer regions 200a and 300a on the first surface S1 and the concave portions 202b and 302b of the heat transfer regions 200b and 300b on the second surface S2 are front and back. The concave portions 201b and 301b of the heat transfer regions 200a and 300a on the first surface S1 and the convex portions 202a and 302a of the heat transfer regions 200b and 300b on the second surface S2 have a front and back relationship. That is, the unevenness groups 201 and 301 on the heat transfer areas 200a and 300a on the first surface S1 of the heat transfer plates 2 and 3, and the unevenness on the heat transfer areas 200b and 300b on the second surface S2 of the heat transfer plates 2 and 3. The groups 202 and 302 are formed in opposite positions at the corresponding positions.

プ レ ー ト The plate heat exchanger 1 according to the present embodiment includes two types of heat transfer plates 2 and 3. The two types of heat transfer plates 2 and 3 are different from each other in that the directions in which the annular portions 21 and 31 extend from the heat transfer portions 20 and 30 and the positions of the unevenness of the unevenness groups 201, 202, 301, and 302 are different. They have the same configuration.

More specifically, the two types of heat transfer plates 2 and 3 include heat transfer portions 20 and 30 including main heat transfer portions 20a and 30a and a pair of ends 20b and 30b, and annular portions 21 and 31. The heat transfer regions 200a, 200b, 300a, 300b of the first surface S1 and the second surface S2 of the main heat transfer portions 20a, 30a are common in having a plurality of uneven groups 201, 202, 301, 302.

In one of the two types of heat transfer plates 2 and 3 (hereinafter, referred to as a first heat transfer plate) 2, the annular portion 21 extends to the second surface S <b> 2 side of the heat transfer portion 20, In the other heat transfer plate (hereinafter, referred to as a second heat transfer plate) 3 of the types of heat transfer plates 2 and 3, the annular portion 31 extends to the first surface S1 side of the heat transfer portion 30.

In each of the heat transfer areas 200a and 200b of the first surface S1 and the second surface S2 of the heat transfer portion 20 (main heat transfer portion 20a) of the first heat transfer plate 2, the plurality of uneven groups 201 and 202 are formed along the X-axis. As seen from the direction, the heat transfer portion 20 is inclined downward from one end to the other end in the Y-axis direction. On the other hand, in the heat transfer regions 300a and 300b of the first surface S1 and the second surface S2 of the heat transfer portion 30 (main heat transfer portion 30a) of the second heat transfer plate 3, a plurality of unevenness groups 301 and 302 are provided. Is inclined downward from the other end to the one end of the heat transfer section 30 in the Y-axis direction when viewed from the X-axis direction.

In the present embodiment, the plurality of uneven groups 301 and 302 of the second heat transfer plate 3 are arranged such that the plurality of uneven groups 201 and 202 of the first heat transfer plate 2 are aligned with the vertical center line CL1 when viewed from the same side in the X-axis direction. And is shifted by a predetermined pitch (one pitch in this embodiment) in the Y-axis direction.

As shown in FIG. 2, the first heat transfer plate 2 and the second heat transfer plate 3 are arranged alternately in the X-axis direction, and the annular portions of the adjacent first heat transfer plate 2 and second heat transfer plate 3 are arranged. 21 and 31 are fitted together (see FIG. 1). In this state, the first surface S1 of the heat transfer portion 20 of the first heat transfer plate 2 faces the first surface S1 of the heat transfer portion 30 of the second heat transfer plate 3, and The second surface S2 of the heat section 20 faces the second surface S2 of the heat transfer section 30 of the second heat transfer plate 3.

In this state, the transfer of the second heat transfer plate 3 to the respective protrusions 201a of the plurality of uneven groups 201 on the first surface S1 (heat transfer region 200a) of the heat transfer portion 20 of the first heat transfer plate 2 is performed. Two (two rows) of uneven groups 301 included in the first surface S1 (heat transfer region 300a) of the heat unit 30 intersect, and the convex portions 301a of the uneven group 301 intersect. That is, the heat transfer portion of the second heat transfer plate 3 is provided for each of the protrusions 201a of the plurality of uneven groups 201 on the first surface S1 (heat transfer region 200a) of the heat transfer portion 20 of the first heat transfer plate 2. The two protrusions 301a on the first surface S1 (the heat transfer region 300a) of the cross 30 abut (see FIG. 7).

Further, the heat transfer portion of the second heat transfer plate 3 is provided to each of the protrusions 202a of the plurality of uneven groups 202 on the second surface S2 (heat transfer region 200b) of the heat transfer portion 20 of the first heat transfer plate 2. The two (two rows) irregular groups 302 included in the second surface S2 (the heat transfer region 300b) of the 30 intersect, and the convex portions 302a of the irregular group 302 intersect. That is, the heat transfer portion of the second heat transfer plate 3 is moved to the respective protrusions 202a of the plurality of irregularities 202 on the second surface S2 (heat transfer region 200b) of the heat transfer portion 20 of the first heat transfer plate 2. The two convex portions 302a on the second surface S2 (the heat transfer region 300b) of 30 cross-impact.

Then, between the annular portions 21 and 31 of the plurality of heat transfer plates 2 and 3 (first heat transfer plate 2 and second heat transfer plate 3) superimposed in the X-axis direction, and through holes 203, 204, 303 and 304. Is sealed in a liquid-tight manner as appropriate. In the present embodiment, the plurality of heat transfer plates 2 and 3 superimposed in the X-axis direction are integrated by brazing, and the brazing is performed between the annular portions 21 and 31 and the through holes 203, 204, 303, and 304. The surroundings are sealed.

As a result, the first and second heat transfer plates 2, 3 (the heat transfer unit 20 of the first heat transfer plate 2 and the heat transfer unit 30 of the second heat transfer plate 3) are bordered by the first heat transfer unit 20. A first flow path Ra for flowing the fluid A in the Z-axis direction and a second flow path Rb for flowing the second fluid B in the Z-axis direction are formed alternately in the X-axis direction. That is, the heat transfer included in the concave portion 201b of the heat transfer area 200a included in the first surface S1 of the heat transfer portion 20 of the first heat transfer plate 2 and the first surface S1 of the heat transfer portion 30 of the second heat transfer plate 3 The space formed by the concave portion 301b of the region 300a constitutes the first flow path Ra, and the concave portion 202b of the heat transfer region 200b and the second portion Sb included in the second surface S2 of the heat transfer portion 20 of the first heat transfer plate 2. The space formed by the concave portion 302b of the heat transfer region 300b included in the second surface S2 of the heat transfer portion 30 of the heat transfer plate 3 forms a second flow path Rb.

Further, the corresponding through holes 203, 204, 303, 304 of the plurality of heat transfer plates 2, 3 (first heat transfer plate 2, second heat transfer plate 3) are connected in the X-axis direction, and only the first flow path Ra is provided. And a pair of first series passages Ra1 and Ra2 that allow the first fluid A to flow into and out of the first flow passage Ra. A pair of second communication passages Rb1 and Rb2, which are a pair of second communication passages Rb1 and Rb2 that communicate only with Rb and that allow the second fluid B to flow into and out of the second flow passage Rb, are formed.

The plate heat exchanger 1 according to the present embodiment is as described above, supplies the first fluid A to one of the first series passages Ra1, and supplies the second fluid B to one of the second communication passages Rb2. Then, the first fluid A flows into each of the plurality of first flow paths Ra from one of the first series passages Ra1, and the second fluid B flows from the one of the second communication paths Rb1 to the plurality of second flow paths Rb. Flow into each.

Then, as shown in FIGS. 7 and 8, the first fluid A flows in the Z-axis direction in the first flow path Ra, and the second fluid B flows in the Z-axis direction in the second flow path Rb. That is, the first fluid A flows from one end of the heat transfer regions 200a, 300a in the Z-axis direction to the other end in the first flow channel Ra, and the second fluid B flows in the second flow channel Rb. , The heat flows from the other ends of the heat transfer regions 200b and 300b in the Z-axis direction toward one end.

More specifically, as shown in FIG. 9, the first fluid A flowing in the first flow path Ra flows along the concave portions 201b and 301b in the heat transfer regions 200a and 300a, and the first fluid A in the concave portions 201b and 301b It collides with the convex portions 201a and 301a (the convex portions 201a and 301a adjacent to the concave portions 201b and 301b) of the included concave and convex groups 201 and 301. As a result, the first fluid A branches to both sides of the colliding convex portions 201a, 202a, 301a, and 302a.

Then, the branched first fluid A flows downstream along the concave portions 201b and 301b of the concave and convex groups 201 and 301 on both sides of the concave and convex groups 201 and 301 including the colliding convex portions 201a and 301a. Then, the first fluid A flowing along the concave portions 201b, 301b is applied to the convex portions 201a, 301a of the concave / convex groups 201, 301 (the convex portions 201a, 301a adjacent to the concave portions 201b, 301b) included in the concave portions 201b, 301b. collide. As a result, the first fluid A colliding with the convex portions 201a, 301a is branched to both sides of the convex portions 201a, 301a.

に よ り Thereby, the first fluid A flows along the concave portions 201b and 301b included in the original unevenness groups 201 and 301. That is, the first fluid A branched by the upstream-side convex portions 201a and 301a merges with the original line (the unevenness groups 201 and 301) by collision with the convex portions 201a and 301a in different rows (adjacent rows). Thus, the first fluid A flows downstream while repeating branching and merging. Thereby, the flow of the first fluid A is disturbed in the first flow path Ra.

In particular, in the present embodiment, since the unevenness groups 201 and 301 (virtual line VL along the unevenness groups 201 and 301) are inclined at less than 45 ° with respect to the vertical center line CL1, the flow direction of the first fluid A flows. Are arranged at an angle that includes a lot of components. Accordingly, when the first fluid A flows downstream, the first fluid A easily flows along the concave portions 201b and 301b, so that an increase in the flow resistance is suppressed.

In the present embodiment, the plurality of uneven groups 202 and 302 of the main heat transfer portions 20a and 30a (the heat transfer areas 200b and 300b on the second surface S2) that define the second flow path Rb define the first flow path Ra. This is a mode in which the unevenness relationship is reversed with respect to the plurality of unevenness groups 201 and 301 of the main heat transfer portions 20a and 30a (the heat transfer regions 200a and 300a on the first surface S1). Since the two convex portions 202a and 302a are in cross-contact with the 302a, the second fluid B flowing in the second flow path Rb also flows in the first flow path Ra as shown in FIG. Like the first fluid A, the fluid flows downstream while repeating branching and merging.

As described above, the first fluid A flows through the first flow channel Ra, and the second fluid B flows through the second flow channel Rb. Heat is exchanged via main heat transfer sections 20a, 30a ( heat transfer areas 200a, 200b, 300a, 300b) that partition Ra and second flow path Rb. Then, as shown in FIG. 2, the first fluid A that has completed the heat exchange is discharged from the first flow path Ra to the outside through the other first series passage Ra2, and the second fluid B that has completed the heat exchange is the second fluid B. It is discharged from the two flow paths Rb to the outside via the other second communication path Rb2.

As described above, the plate heat exchanger 1 according to the present embodiment includes the heat transfer plates 2 and 3 including the heat transfer regions 200a, 200b, 300a, and 300b on both surfaces in the X-axis direction. Regions 200a, 200b, 300a, and 300b are provided with a plurality of heat transfer plates 2 and 3 superposed in the X-axis direction. A first flow path Ra for flowing in the Z-axis direction orthogonal to the direction and a second flow path Rb for flowing the second fluid B in the Z-axis direction are formed alternately in the X-axis direction, and the heat transfer regions 200a, 200b, 300a and 300b include convex portions 201a, 202a, 301a and 302a and concave portions 201b, 202b, 301b and 302b having a length in a direction inclined with respect to the longitudinal center line CL1 extending in the Z-axis direction. The projections 201a, 202a, 301a, 302a and the depressions 201b, 202b, 301b, 302b are irregular groups 201, 202, 301, 302 alternately arranged along a virtual line VL extending in the inclined direction. It has a plurality of concavo- convex groups 201, 202, 301, 302 arranged in a direction orthogonal to the direction of inclination, and each of the convex portions 201a, 202a, 301a, 302a of the plurality of concavo- convex groups 201, 202, 301, 302 The recesses 201b, 202b, 301b, 302b of the concavo- convex groups 201, 202, 301, 302 adjacent in the direction perpendicular to the tilting direction are arranged side by side, and the plurality of concavo- convex groups 201, 202, 301, Each of the recesses 201b, 202b, 301b, 302b of the 302 is orthogonal to the tilting direction. The heat transfer regions 200a, 200b, 300a, 300b are arranged side by side with the protrusions 201a, 202a, 301a, 302a of the concavo- convex groups 201, 202, 301, 302 which are adjacent to each other in the direction in which the heat transfer regions 200a, 200b, 300a, 300b face each other. The plates 2 and 3 make the projections 201a, 202a, 301a and 302a of the concavo- convex groups 201, 202, 301 and 302 cross each other.

According to the above configuration, the protrusions 201a, 202a, 301a, 302a and the recesses 201b of the plurality of uneven groups 201, 202, 301, 302 in the heat transfer plates 2, 3 ( heat transfer regions 200a, 200b, 300a, 300b). , 202b, 301b, 302b are arranged in a staggered manner. That is, the plurality of convex portions 201a, 202a, 301a, 302a are arranged in a staggered manner in the heat transfer regions 200a, 200b, 300a, 300b, and the plurality of concave portions 201b, 202b, 301b, 302b are formed in the heat transfer regions 200a, 200b, The plurality of protrusions 201a, 202a, 301a, and 302a are arranged in a staggered manner in 300a and 300b.

Accordingly, when the first fluid A flows in the Z-axis direction in the first flow path Ra, the first fluid A is transferred to the concave portions 201b and 301b in the heat transfer plates 2 and 3 ( heat transfer areas 200a and 300a) that define the first flow path Ra. It flows along and collides with the convex portions 201a, 301a adjacent on the downstream side of the concave portions 201b, 301b (the convex portions 201a, 301a of the common concave / convex groups 201, 301).

Then, the flow of the first fluid A changes, and the first fluid A is filled with the peripheral concave portions 201b and 301b (for example, concave portions 201b and 301b of the concave and convex groups 201 and 301 on both sides, and concave and convex groups of the heat transfer plates 2 and 3 on the other side). 201, 301, and flows along the concave portions 201b, 301b. As described above, the first fluid A flows downstream while repeating the flow along the concave portions 201b and 301b and the collision with the convex portions 201a and 301a.

When the second fluid B flows in the Z-axis direction in the second flow path Rb, the concave portions 202b and 302b in the heat transfer plates 2 and 3 ( heat transfer areas 200b and 300b) that define the second flow path Rb. And collides with the adjacent convex portions 202a, 302a on the downstream side of the concave portions 202b, 302b (the convex portions 202a, 302a of the common concave / convex groups 202, 302).

Then, the flow of the second fluid B is changed, and the second fluid B is filled with the peripheral concave portions 202b and 302b (for example, the concave portions 202b and 302b of the concave and convex groups 202 and 302 on both sides, and the concave and convex groups of the heat transfer plates 2 and 3 on the other side). 202, 302b) and flows along the recesses 202b, 302b. As described above, the second fluid B flows downstream while repeating the flow along the concave portions 202b and 302b and the collision with the convex portions 202a and 302a.

As described above, the concave portions 201b, 202b in the heat transfer regions 200a, 200b, 300a, 300b in which the first fluid A and the second fluid B each define a flow path (the first flow path Ra or the second flow path Rb). , 301b, and 302b, the plate-type heat exchanger 1 having the above-described configuration suppresses an increase in flow resistance. Further, since each of the first fluid A and the second fluid B collides with the convex portions 201a, 202a, 301a, 302a of the concave and convex groups 201, 202, 301, 302 including the concave portions 201b, 202b, 301b, 302b, In the plate heat exchanger 1 having the configuration, the flows of the first fluid A and the second fluid B are disturbed, and high heat transfer performance is obtained.

In particular, in the present embodiment, each of the protrusions 201a, 202a, 301a, 302a of the plurality of uneven groups 201, 202, 301, 302 in the heat transfer regions 200a, 200b, 300a, 300b of the heat transfer plates 2, 3 , At least two of the plurality of concavo- convex groups 201, 202, 301, 302 in the heat transfer regions 200a, 200b, 300a, 300b of the opposing heat transfer plates 2, 3 adjacent in the X-axis direction. , 301, 302 cross-impact with the projections 201a, 202a, 301a, 302a.

With this configuration, the first fluid A that has collided with the convex portions 201a and 301a is guided to the concave portions 201b and 301b of the concave and convex groups 201 and 301 on both sides of the concave and convex groups 201 and 301 including the convex portions 201a and 301a. The second fluid B colliding with the convex portions 202a and 302a is guided to the concave portions 202b and 302b of the concave and convex groups 202 and 302 on both sides of the concave and convex groups 202 and 302 including the convex portions 202a and 302a.

More specifically, the plurality of uneven groups 201, 202, 301, and 302 in the common heat transfer regions 200a, 200b, 300a, and 300b are inclined in the direction of inclination with respect to the vertical center line CL1 (the direction in which the virtual line VL extends). The projections 201 a, 202 a, 301 a, 302 a of the different concavo- convex groups 201, 202, 301, 302 are arranged in the orthogonal direction, and therefore, the extending direction of the concavo- convex groups 201, 202, 301, 302 (the direction in which the virtual line VL extends). Are arranged at different positions in a direction orthogonal to the direction. That is, the convex portions 201a, 202a, 301a, 302a of the different concavo- convex groups 201, 202, 301, 302 are arranged at intervals in a direction orthogonal to the inclination direction (the direction in which the virtual line VL extends) with respect to the vertical center line CL1. You.

Therefore, for each of the convex portions 201a, 202a, 301a, 302a of the plurality of uneven groups 201, 202, 301, 302 in the heat transfer regions 200a, 200b, 300a, 300b of the heat transfer plates 2, 3, At least two convex portions 201a, 202a, 301a, 302a of the mating heat transfer plates 2, 3 (protrusions of different unevenness groups 201, 202, 301, 302) are spaced apart in the longitudinal direction of 201a, 202a, 301a, 302a. 201a, 202a, 301a, 302a) cross-impact.

That is, the heat transfer plates of the mating members 201, 202a, 301a, and 302a in the heat transfer regions of the heat transfer plates 2 and 3 are provided at the ends of the protrusions 201a, 202a, 301a, and 302a or in the vicinity thereof. The protruding portions 201a, 202a, 301a, and 302a of the plates 2 and 3 (the protruding portions 201a, 202a, 301a, and 302a of the different concavo- convex groups 201, 202, 301, and 302) intersect.

As a result, even if the first fluid A colliding with the convex portions 201a and 301a attempts to flow toward the heat transfer plates 2 and 3 of the other party, the first fluid A is blocked by the convex portions 201a and 301a of the heat transfer plates 2 and 3 of the other party. As a result, it is guided (branched) to the concave portions 201b and 301b of the concave and convex groups 201 and 301 on both sides of the concave and convex groups 201 and 301 including the colliding convex portions 201a and 301a, and flows along the concave portions 201b and 301b. Then, the first fluid A flowing along the concave portions 201b, 301b collides with the convex portions 201a, 301a adjacent to the concave portions 201b, 301b.

Then, the first fluid A also attempts to flow toward the heat transfer plates 2 and 3 of the other party, but is blocked by the convex portions 201a and 301a of the heat transfer plates 2 and 3 of the other party, and as a result, collides. It is guided (branched) to the concave portions 201b and 301b of the concave and convex groups 201 and 301 on both sides of the concave and convex groups 201 and 301 including the convex portions 201a and 301a. That is, it is guided (merged) to the concave portions 201b and 301b included in the original concave and convex groups 201 and 301. As a result, the first fluid A repeatedly branches and joins upon collision with the convex portions 201a and 301a, and flows to the downstream side. This flow (a flow in which branching and merging are repeated by collision with the convex portions 201a and 301a) is the same for the second fluid B.

As described above, there is an opportunity for the first fluid A to flow through the recesses 201b and 301b in the first channel Ra, and there is an opportunity for the second fluid B to flow in the recesses 202b and 302b in the second channel Rb. This suppresses the increase in flow resistance. In addition, the first fluid A repeats branching and joining in the first flow path Ra, and the second fluid B repeats branching and joining in the second flow path Rb. As a result, the heat exchange performance (heat transfer performance) between the first fluid A and the second fluid B increases.

Further, in the plate heat exchanger 1 according to the present embodiment, the first fluid A repeats branching and joining in the first channel Ra, and the second fluid B repeats branching and joining in the second channel Rb. Then, since the respective flows of the first fluid A and the second fluid B are disturbed, the disturbed flows exert a mixing function.

Thereby, the plate heat exchanger 1 according to the present embodiment can prevent components contained in at least one of the first fluid A and the second fluid B from being separated in the flow process.

In addition, the plate heat exchanger 1 according to the present embodiment is configured such that a fluid in which two or more types of liquids are combined or one or more types of liquids and powders are supplied to one of the first channel Ra and the second channel Rb. By flowing the fluid combined with the body as the first fluid A or the second fluid B, two or more types of liquid constituting the first fluid A or the second fluid B, or one or more types of liquid and powder Can be mixed (mixed).

Therefore, the plate heat exchanger 1 according to the present embodiment can also function as a mixer that mixes a plurality of components contained in either the first fluid A or the second fluid B. That is, the plate heat exchanger 1 according to the present embodiment mixes the first fluid A and the second fluid B while mixing a plurality of components contained in either the first fluid A or the second fluid B. By performing heat exchange (heating or cooling either the first fluid A or the second fluid B), the reactor contained in the first fluid A or the second fluid B reacts with each other. Function.

In the present embodiment, the virtual line VL, which is a reference for the arrangement of the concavo- convex groups 201, 202, 301, and 302, is inclined at an angle of less than 45 ° with respect to the vertical center line CL1 extending in the Z-axis direction. The components in the direction extending in the longitudinal direction of the concave portions 201b, 202b, 301b, and 302b included in the concave and convex groups 201, 202, 301, and 302 are the component of the flow direction of the first fluid A and the second fluid B in the flow direction. Is included more than the component in the direction orthogonal to.

This facilitates the flow of the first fluid A in the first flow path Ra and the flow of the second fluid B in the second flow path Rb. That is, in each of the first flow path Ra and the second flow path Rb, an increase in flow resistance is suppressed.

As described above, according to the plate heat exchanger 1 according to the present embodiment, an excellent effect that high heat transfer performance can be obtained while suppressing an increase in fluid flow resistance can be achieved.

Next, a plate heat exchanger according to a second embodiment of the present invention will be described with reference to the accompanying drawings. The plate heat exchanger according to the present embodiment has the same configuration as the first embodiment or a configuration corresponding thereto. Accordingly, in the description of the plate heat exchanger according to the present embodiment, the same configurations or corresponding configurations as in the first embodiment will be denoted by the same names and the same reference numerals.

As shown in FIG. 11, the plate-type heat exchanger exchanges heat between the first fluid A and the second fluid B, and includes a plurality of heat transfer plates 2 and 3 stacked in the first direction.

In the following description, a first direction is defined as an X-axis direction, a second direction orthogonal to the first direction is defined as a Z-axis direction, and a third direction orthogonal to each of the first direction and the second direction is defined as a Y-axis direction. Direction. Accordingly, in each drawing, three orthogonal axes (X-axis corresponding to the X-axis direction, Y-axis corresponding to the Y-axis direction, and Z-axis corresponding to the Z-axis direction) are supplementarily illustrated in each drawing. It is illustrated.

In the plate heat exchanger 1 according to the present embodiment, as shown in FIG. 12, a first flow path Ra that allows the first fluid A to flow in the Z-axis direction with each of the plurality of heat transfer plates 2 and 3 as a boundary. And a second flow path Rb for flowing the second fluid B in the Z-axis direction are formed alternately in the X-axis direction.

As shown in FIGS. 13 to 16, each of the plurality of heat transfer plates 2 and 3 includes heat transfer regions 200a, 200b, 300a and 300b on both surfaces S1 and S2 in the X-axis direction. More specifically, each of the plurality of heat transfer plates 2 and 3 includes a heat transfer unit 20 or 30 having a first surface S1 and a second surface S2 opposite to the first surface S1 in the X-axis direction. , And annular portions 21 and 31 extending from the entire outer periphery of the heat transfer units 20 and 30.

第一 The first surface S1 and the second surface S2 of the heat transfer units 20, 30 include heat transfer regions 200a, 200b, 300a, 300b that contribute to heat exchange between the first fluid A and the second fluid B.

す る と Specifically, the heat transfer units 20 and 30 are formed in a square shape when viewed from the X-axis direction. In the present embodiment, the heat transfer units 20 and 30 are formed in a rectangular shape that is elongated in the Z-axis direction when viewed from the X-axis direction. The heat transfer units 20 and 30 mainly include an intersection of a center line (hereinafter, referred to as a vertical center line) CL1 extending in the Z-axis direction and a center line (hereinafter, referred to as horizontal center line) CL2 extending in the Y-axis direction. Heat transfer portions 20a, 30a and a pair of ends 20b, 30b on both sides of the main heat transfer portions 20a, 30a in the Z-axis direction are included.

The main heat transfer sections 20a and 30a are formed in a square shape when viewed from the X-axis direction. In the present embodiment, the main heat transfer sections 20a and 30a are formed in a rectangular shape having a length in the Z-axis direction. The pair of ends 20b and 30b are continuous with the main heat transfer sections 20a and 30a, and form the entire heat transfer sections 20 and 30 in a square shape (rectangular shape) when viewed from the X-axis direction.

第一 The first surface S1 and the second surface S2 of the main heat transfer portions 20a, 30a of the heat transfer portions 20, 30 are heat transfer regions 200a, 200b, 300a, 300b. Each of the heat transfer regions 200a, 200b, 300a, 300b of the first surface S1 and the second surface S2 has a convex portion 201a, 202a having a length in a direction inclined with respect to the vertical center line CL1 (hereinafter referred to as an inclined direction). , 301a, 302a and concave portions 201b, 202b, 301b, 302b, and the convex portions 201a, 202a, 301a, 302a and concave portions 201b, 202b, 301b, 302b are alternately arranged along an imaginary line VL extending in the inclined direction. Groups 201, 202, 301, and 302 include a plurality of uneven groups 201, 202, 301, and 302 arranged in a direction orthogonal to the tilt direction.

Each of the convex portions 201a, 202a, 301a, 302a of the plurality of concave / convex groups 201, 202, 301, 302 is formed with concave portions 201b, 202b, 301b of the concave / convex groups 201, 202, 301, 302 adjacent in the direction orthogonal to the inclination direction. , 302b. On the other hand, each of the concave portions 201b, 202b, 301b, and 302b of the plurality of concave / convex groups 201, 202, 301, and 302 has a convex portion 201a of the concave / convex groups 201, 202, 301, and 302 that are adjacent to each other in a direction orthogonal to the inclination direction. , 202a, 301a, and 302a.

That is, the projections 201a, 202a, 301a, and 302a of the plurality of rows of unevenness groups 201, 202, 301, and 302 are arranged in a staggered manner in the heat transfer regions 200a, 200b, 300a, and 300b. , 202, 301, 302 are disposed between the convex portions 201a, 202a, 301a, 302a in the heat transfer regions 200a, 200b, 300a, 300b, and the heat transfer regions 200a, They are arranged in a zigzag pattern within 200b, 300a, and 300b.

More specifically, in the present embodiment, each of the convex portions 201a, 202a, 301a, and 302a of the plurality of concave and convex groups 201, 202, 301, and 302 is formed with the concave portion 201b of the adjacent concave and convex groups 201, 202, 301, and 302. , 202b, 301b, 302b in the Y-axis direction. On the other hand, each of the concave portions 201b, 202b, 301b, and 302b of the plurality of concave / convex groups 201, 202, 301, and 302 is different from the convex portions 201a, 202a, 301a, and 302a of the adjacent concave / convex groups 201, 202, 301, and 302. They are arranged side by side in the Y-axis direction.

Thereby, a plurality of groups (rows) in which the convex portions 201a, 202a, 301a, 302a and the concave portions 201b, 202b, 301b, 302b of the different concavo- convex groups 201, 202, 301, 302 are alternately arranged in the Y-axis direction are formed. , In the Z-axis direction.

The inclination direction is set to a direction inclined at an angle of less than 45 ° with respect to the vertical center line CL1. Accordingly, the inclination angle θ1 of the virtual line VL with respect to the vertical center line CL1 is set to less than 45 °. That is, the inclination angle θ2 of the virtual line VL with respect to the horizontal center line CL2 is set to be larger than 45 °. In the present embodiment, the inclination angle θ1 of the virtual line VL with respect to the vertical center line CL1 is set to 30 ° to 40 °. In the present embodiment, the inclination angle θ2 of the virtual line VL with respect to the horizontal center line CL2 is set to 60 ° to 70 °.

Thus, the plurality of heat transfer plates 2 and 3 are stacked with the heat transfer portions 20 and 30 ( heat transfer regions 200a, 200b, 300a and 300b) facing each other, so that the adjacent heat transfer plates 2 and 3 are stacked. The projections 201a, 202a, 301a, and 302a of the three concavo- convex groups 201, 202, 301, and 302 cross each other.

Here, the longitudinal lengths of the convex portions 201a, 202a, 301a, 302a and the longitudinal lengths of the concave portions 201b, 202b, 301b, 302b included in each of the concavo- convex groups 201, 202, 301, 302 (virtual line VL (The intervals between the convex portions 201a, 202a, 301a, and 302a) arranged in the extending direction of the heat transfer plates 200, 300a, 202a, 301a, and 302a. Intersect with one (one row) concavo- convex group 201, 202, 301, 302 included in 200b, 300a, 300b (for convex parts 201a, 202a, 301a, 302a of one concavo- convex group 201, 202, 301, 302). Cross collision).

The projections 201a, 202a, 301a, 302a (tops of the projections 201a, 202a, 301a, 302a) and the recesses 201b, 202b, 301b, 302b (bottoms of the recesses 201b, 202b, 301b, 302b) in the X-axis direction Different position. Therefore, between the convex portions 201a, 202a, 301a, 302a and the concave portions 201b, 202b, 301b, 302b, the bottoms of the concave portions 201b, 202b, 301b, 302b (from the top of the convex portions 201a, 202a, 301a, 302a). An intermediate region (not numbered) is formed from the bottom of the recesses 201b, 202b, 301b, 302b to the top of the protrusions 201a, 202a, 301a, 302a).

This intermediate region is located between the convex portions 201a, 202a, 301a, 302a and the concave portions 201b, 202b, 301b, 302b in the concave / convex groups 201, 202, 301, 302, and the adjacent concave / convex groups 201, 202, 301, 302. Are disposed between the convex portions 201a, 202a, 301a, 302a and the concave portions 201b, 202b, 301b, 302b.

The intermediate region may include a middle portion that extends in the Z-axis direction and the Y-axis direction at an intermediate position between the tops of the protrusions 201a, 202a, 301a, and 302a and the bottoms of the recesses 201b, 202b, 301b, and 302b. In the present embodiment, from the top of the projections 201a, 202a, 301a, 302a to the bottom of the depressions 201b, 202b, 301b, 302b (or from the bottom of the depressions 201b, 202b, 301b, 302b, the projections 201a, 202a). , 301a, 302a).

A pair of through holes 203, 204, 303, 304 penetrating in the X-axis direction are provided in each of the pair of ends 20b, 30b. In each of the pair of ends 20b and 30b, the pair of through holes 203, 204, 303 and 304 are arranged at intervals in the Y-axis direction. In the present embodiment, the pair of through holes 203, 204, 303, 304 are arranged with the vertical center line CL1 interposed therebetween.

In the present embodiment, each of the plurality of heat transfer plates 2 and 3 is formed by press-molding a metal plate. Accordingly, in each of the heat transfer plates 2 and 3, the convex portions 201a and 301a of the heat transfer regions 200a and 300a on the first surface S1 and the concave portions 202b and 302b of the heat transfer regions 200b and 300b on the second surface S2 are front and back. The concave portions 201b and 301b of the heat transfer regions 200a and 300a on the first surface S1 and the convex portions 202a and 302a of the heat transfer regions 200b and 300b on the second surface S2 have a front and back relationship. That is, the unevenness groups 201 and 301 on the heat transfer areas 200a and 300a on the first surface S1 of the heat transfer plates 2 and 3, and the unevenness on the heat transfer areas 200b and 300b on the second surface S2 of the heat transfer plates 2 and 3. The groups 202 and 302 are formed in opposite positions at the corresponding positions.

プ レ ー ト The plate heat exchanger 1 according to the present embodiment includes two types of heat transfer plates 2 and 3. The two types of heat transfer plates 2 and 3 are different from each other in that the directions in which the annular portions 21 and 31 extend from the heat transfer portions 20 and 30 and the positions of the unevenness of the unevenness groups 201, 202, 301, and 302 are different. They have the same configuration.

More specifically, the two types of heat transfer plates 2 and 3 include heat transfer portions 20 and 30 including main heat transfer portions 20a and 30a and a pair of ends 20b and 30b, and annular portions 21 and 31. The heat transfer regions 200a, 200b, 300a, 300b of the first surface S1 and the second surface S2 of the main heat transfer portions 20a, 30a are common in having a plurality of uneven groups 201, 202, 301, 302.

In one of the two types of heat transfer plates 2 and 3 (hereinafter, referred to as a first heat transfer plate) 2, the annular portion 21 extends to the second surface S <b> 2 side of the heat transfer portion 20, In the other heat transfer plate (hereinafter, referred to as a second heat transfer plate) 3 of the types of heat transfer plates 2 and 3, the annular portion 31 extends to the first surface S1 side of the heat transfer portion 30.

In each of the heat transfer areas 200a and 200b of the first surface S1 and the second surface S2 of the heat transfer portion 20 (main heat transfer portion 20a) of the first heat transfer plate 2, the plurality of uneven groups 201 and 202 are formed along the X-axis. As seen from the direction, the heat transfer portion 20 is inclined downward from one end to the other end in the Y-axis direction. On the other hand, in the heat transfer regions 300a and 300b of the first surface S1 and the second surface S2 of the heat transfer portion 30 (main heat transfer portion 30a) of the second heat transfer plate 3, a plurality of unevenness groups 301 and 302 are provided. Is inclined downward from the other end to the one end of the heat transfer section 30 in the Y-axis direction when viewed from the X-axis direction. In the present embodiment, the plurality of uneven groups 301 and 302 of the second heat transfer plate 3 are arranged such that the plurality of uneven groups 201 and 202 of the first heat transfer plate 2 are aligned with the vertical center line CL1 when viewed from the same side in the X-axis direction. The arrangement is reversed.

As shown in FIG. 12, the first heat transfer plate 2 and the second heat transfer plate 3 are alternately arranged in the X-axis direction, and the annular portions of the adjacent first heat transfer plate 2 and second heat transfer plate 3 21 and 31 are fitted together (see FIG. 13). In this state, the first surface S1 of the heat transfer portion 20 of the first heat transfer plate 2 faces the first surface S1 of the heat transfer portion 30 of the second heat transfer plate 3, and The second surface S2 of the heat section 20 faces the second surface S2 of the heat transfer section 30 of the second heat transfer plate 3.

In this state, the transfer of the second heat transfer plate 3 to the respective protrusions 201a of the plurality of uneven groups 201 on the first surface S1 (heat transfer region 200a) of the heat transfer portion 20 of the first heat transfer plate 2 is performed. One row of unevenness groups 301 included in the first surface S1 (heat transfer area 300a) of the heat unit 30 intersect, and the projections 301a of the unevenness group 301 intersect. That is, the heat transfer portion of the second heat transfer plate 3 is provided for each of the protrusions 201a of the plurality of uneven groups 201 on the first surface S1 (heat transfer region 200a) of the heat transfer portion 20 of the first heat transfer plate 2. One of the protrusions 301a on the first surface S1 (the heat transfer region 300a) of the thirty cross-impacts.

Further, the heat transfer portion of the second heat transfer plate 3 is provided to each of the protrusions 202a of the plurality of uneven groups 202 on the second surface S2 (heat transfer region 200b) of the heat transfer portion 20 of the first heat transfer plate 2. One row of the uneven groups 302 included in the second surface S2 (the heat transfer region 300b) of 30 intersects, and the convex portions 302a of the uneven group 302 intersect. That is, the heat transfer portion of the second heat transfer plate 3 is moved to the respective protrusions 202a of the plurality of irregularities 202 on the second surface S2 (heat transfer region 200b) of the heat transfer portion 20 of the first heat transfer plate 2. One of the convex portions 302a on the second surface S2 (the heat transfer region 300b) of 30 cross-collides.

Then, between the annular portions 21 and 31 of the plurality of heat transfer plates 2 and 3 (first heat transfer plate 2 and second heat transfer plate 3) superimposed in the X-axis direction, and through holes 203, 204, 303 and 304. Is sealed in a liquid-tight manner as appropriate. In the present embodiment, the plurality of heat transfer plates 2 and 3 superimposed in the X-axis direction are integrated by brazing, and the brazing is performed between the annular portions 21 and 31 and the through holes 203, 204, 303, and 304. The surroundings are sealed.

As a result, the first and second heat transfer plates 2, 3 (the heat transfer unit 20 of the first heat transfer plate 2 and the heat transfer unit 30 of the second heat transfer plate 3) are bordered by the first heat transfer unit 20. A first flow path Ra for flowing the fluid A in the Z-axis direction and a second flow path Rb for flowing the second fluid B in the Z-axis direction are formed alternately in the X-axis direction. That is, the heat transfer included in the concave portion 201b of the heat transfer area 200a included in the first surface S1 of the heat transfer portion 20 of the first heat transfer plate 2 and the first surface S1 of the heat transfer portion 30 of the second heat transfer plate 3 The space formed by the concave portion 301b of the region 300a constitutes the first flow path Ra, and the concave portion 202b of the heat transfer region 200b and the second portion Sb included in the second surface S2 of the heat transfer portion 20 of the first heat transfer plate 2. The space formed by the concave portion 302b of the heat transfer region 300b included in the second surface S2 of the heat transfer portion 30 of the heat transfer plate 3 forms a second flow path Rb.

Further, the corresponding through holes 203, 204, 303, 304 of the plurality of heat transfer plates 2, 3 (first heat transfer plate 2, second heat transfer plate 3) are connected in the X-axis direction, and only the first flow path Ra is provided. And a pair of first series passages Ra1 and Ra2 that allow the first fluid A to flow into and out of the first flow passage Ra. A pair of second communication passages Rb1 and Rb2, which are a pair of second communication passages Rb1 and Rb2 that communicate only with Rb and that allow the second fluid B to flow into and out of the second flow passage Rb, are formed.

The plate heat exchanger 1 according to the present embodiment is as described above, supplies the first fluid A to one of the first series passages Ra1, and supplies the second fluid B to one of the second communication passages Rb1. Then, the first fluid A flows into each of the plurality of first flow paths Ra from one of the first series passages Ra1, and the second fluid B flows from the one of the second communication paths Rb1 to the plurality of second flow paths Rb. Flow into each.

Then, as shown in FIGS. 17 and 18, the first fluid A flows in the Z-axis direction in the first flow path Ra, and the second fluid B flows in the Z-axis direction in the second flow path Rb. That is, the first fluid A flows from one end of the heat transfer regions 200a, 300a in the Z-axis direction to the other end in the first flow channel Ra, and the second fluid B flows in the second flow channel Rb. , The heat flows from the other ends of the heat transfer regions 200b and 300b in the Z-axis direction toward one end.

More specifically, as shown in FIG. 19, the first fluid A flowing in the first flow path Ra flows along the concave portions 201b and 301b in the heat transfer regions 200a and 300a, and the first fluid A flows in the concave portions 201b and 301b. It collides with the convex portions 201a and 301a (the convex portions 201a and 301a adjacent to the concave portions 201b and 301b) of the included concave and convex groups 201 and 301. As a result, the first fluid A tries to get over the convex portions 201a and 301a.

Then, the first fluid A tends to flow to the heat transfer plates 2 and 3 of the counterpart with respect to the heat transfer plates 2 and 3 having the concave portions 201 b and 301 b circulated.

In the present embodiment, the single convex portions 201a and 301a of the adjacent heat transfer plates 2 and 3 cross abut with each other, and the convex portions 201a and 301a of the mating heat transfer plates 2 and 3 are opposed to each other. The concavo- convex groups 201 and 301 including 201a and 301a and the concave parts 201b and 301b of another concavo- convex group 201 and 301 are arranged side by side.

Therefore, the first fluid A, which collides with the convex portions 201a and 301a and changes the flow direction, moves onto the concave portions 201b and 301b of the mating heat transfer plates 2 and 3, and flows along the concave portions 201b and 301b. Then, it collides with the convex portions 201a, 301a (the convex portions 201a, 301a adjacent to the concave portions 201b, 301b) of the concave / convex groups 201, 301 including the concave portions 201b, 301b. Along with this, the first fluid A tries to get over the convex portions 201a and 301a, and flows to the heat transfer plates 2 and 3 of the counterpart with respect to the heat transfer plates 2 and 3 having the concave portions 201b and 301b. And

In this embodiment, the single convex portions 201a, 202a, 301a, and 302a of the adjacent heat transfer plates 2 and 3 cross abut with each other at the center, and the convex portions 201a and 301a of the other heat transfer plates 2 and 3 are opposed to each other. On the other hand, since the concavo- convex groups 201 and 301 including the convex portions 201a and 301a and the concave portions 201b and 301b of another concavo- convex group 201 and 301 exist side by side, they collide with the convex portions 201a and 301a and change the flow direction. The changed first fluid A transfers to the concave portions 201b and 301b of the heat transfer plates 2 and 3 of the other party, and flows along the concave portions 201b and 301b.

As described above, the first fluid A sequentially passes through the plurality of concave portions 201b and 301b of the adjacent heat transfer plates 2 and 3 (the concave portions 201b and 301b in which the inclined directions of the adjacent heat transfer plates 2 and 3 are different). Move toward the downstream side while moving. That is, the first fluid A flows downstream while creating a spiral flow. Thereby, the flow of the first fluid A is disturbed in the first flow path Ra.

In particular, in the present embodiment, since the concavo-convex groups 201 and 301 (the imaginary line VL along the concavo-convex groups 201 and 301) are inclined at less than 45 ° with respect to the vertical center line CL1, the direction in which the first fluid A flows is different. It is arranged at an angle that contains many components. Accordingly, when the first fluid A flows downstream, the first fluid A easily flows along the concave portions 201b and 301b, so that an increase in the flow resistance is suppressed.

In the present embodiment, the plurality of uneven groups 202 and 302 of the main heat transfer portions 20a and 30a (the heat transfer areas 200b and 300b on the second surface S2) that define the second flow path Rb define the first flow path Ra. This is a mode in which the unevenness relationship is reversed with respect to the plurality of unevenness groups 201 and 301 of the main heat transfer portions 20a and 30a (the heat transfer regions 200a and 300a on the first surface S1). Since the single protrusions 201a and 301a are in cross-collision with 301a, as shown in FIG. 20, the second fluid B flowing in the second flow path Rb also flows in the first flow path Ra. Similarly to the first fluid A, the fluid flows downstream while forming a spiral flow.

As described above, the first fluid A flows through the first flow channel Ra, and the second fluid B flows through the second flow channel Rb. Heat is exchanged via main heat transfer sections 20a, 30a ( heat transfer areas 200a, 200b, 300a, 300b) that partition Ra and second flow path Rb. Then, as shown in FIG. 12, the first fluid A that has completed the heat exchange is discharged from the first flow path Ra to the outside through the other first series passage Ra2, and the second fluid B that has completed the heat exchange is the second fluid B. It is discharged from the two flow paths Rb to the outside via the other second communication path Rb2.

As described above, the plate heat exchanger 1 according to the present embodiment includes the heat transfer plates 2 and 3 including the heat transfer regions 200a, 200b, 300a, and 300b on both surfaces in the X-axis direction. Regions 200a, 200b, 300a, and 300b are provided with a plurality of heat transfer plates 2 and 3 superposed in the X-axis direction. A first flow path Ra for flowing in the Z-axis direction orthogonal to the direction and a second flow path Rb for flowing the second fluid B in the Z-axis direction are formed alternately in the X-axis direction, and the heat transfer regions 200a, 200b, 300a and 300b include convex portions 201a, 202a, 301a and 302a and concave portions 201b, 202b, 301b and 302b having a length in a direction inclined with respect to the longitudinal center line CL1 extending in the Z-axis direction. The projections 201a, 202a, 301a, 302a and the depressions 201b, 202b, 301b, 302b are irregular groups 201, 202, 301, 302 alternately arranged along a virtual line VL extending in the inclined direction. It has a plurality of concavo- convex groups 201, 202, 301, 302 arranged in a direction orthogonal to the direction of inclination, and each of the convex portions 201a, 202a, 301a, 302a of the plurality of concavo- convex groups 201, 202, 301, 302 The recesses 201b, 202b, 301b, 302b of the concavo- convex groups 201, 202, 301, 302 adjacent in the direction perpendicular to the tilting direction are arranged side by side, and the plurality of concavo- convex groups 201, 202, 301, Each of the recesses 201b, 202b, 301b, 302b of the 302 is orthogonal to the tilting direction. The heat transfer regions 200a, 200b, 300a, 300b are arranged side by side with respect to the protrusions 201a, 202a, 301a, 302a of the concavo- convex groups 201, 202, 301, 302 adjacent in the same direction, and the heat transfer regions 200a, 200b, 300a, 300b face each other. The plates 2 and 3 are characterized in that the protrusions 201a, 202a, 301a and 302a of the concavo- convex groups 201, 202, 301 and 302 are cross-imputed with each other.

According to the above configuration, the protrusions 201a, 202a, 301a, 302a and the recesses 201b of the plurality of uneven groups 201, 202, 301, 302 in the heat transfer plates 2, 3 ( heat transfer regions 200a, 200b, 300a, 300b). , 202b, 301b, 302b are arranged in a staggered manner. That is, the plurality of convex portions 201a, 202a, 301a, 302a are arranged in a staggered manner in the heat transfer regions 200a, 200b, 300a, 300b, and the plurality of concave portions 201b, 202b, 301b, 302b are formed in the heat transfer regions 200a, 200b, The plurality of protrusions 201a, 202a, 301a, and 302a are arranged in a staggered manner in 300a and 300b.

Accordingly, when the first fluid A flows in the Z-axis direction in the first flow path Ra, the first fluid A is transferred to the concave portions 201b and 301b in the heat transfer plates 2 and 3 ( heat transfer areas 200a and 300a) that define the first flow path Ra. It flows along and collides with the convex portions 201a, 301a adjacent on the downstream side of the concave portions 201b, 301b (the convex portions 201a, 301a of the common concave / convex groups 201, 301).

Then, the flow of the first fluid A changes, and the first fluid A is filled with the peripheral concave portions 201b and 301b (for example, concave portions 201b and 301b of the concave and convex groups 201 and 301 on both sides, and concave and convex groups of the heat transfer plates 2 and 3 on the other side). 201, 301, and flows along the concave portions 201b, 301b. As described above, the first fluid A flows downstream while repeating the flow along the concave portions 201b and 301b and the collision with the convex portions 201a and 301a.

When the second fluid B flows in the Z-axis direction in the second flow path Rb, the concave portions 202b and 302b in the heat transfer plates 2 and 3 ( heat transfer areas 200b and 300b) that define the second flow path Rb. And collides with the adjacent convex portions 202a, 302a on the downstream side of the concave portions 202b, 302b (the convex portions 202a, 302a of the common concave / convex groups 202, 302).

Then, the flow of the second fluid B is changed, and the second fluid B is filled with the peripheral concave portions 202b and 302b (for example, the concave portions 202b and 302b of the concave and convex groups 202 and 302 on both sides, and the concave and convex groups of the heat transfer plates 2 and 3 on the other side). 202, 302b) and flows along the recesses 202b, 302b. As described above, the second fluid B flows downstream while repeating the flow along the concave portions 202b and 302b and the collision with the convex portions 202a and 302a.

As described above, the concave portions 201b, 202b in the heat transfer regions 200a, 200b, 300a, 300b in which the first fluid A and the second fluid B each define a flow path (the first flow path Ra or the second flow path Rb). , 301b, and 302b, the plate-type heat exchanger 1 having the above-described configuration suppresses an increase in flow resistance.

Further, since each of the first fluid A and the second fluid B collides with the convex portions 201a, 202a, 301a, 302a of the concave and convex groups 201, 202, 301, 302 including the concave portions 201b, 202b, 301b, 302b, In the plate heat exchanger 1 having the configuration, the flows of the first fluid A and the second fluid B are disturbed, and high heat transfer performance is obtained.

In particular, in the present embodiment, each of the protrusions 201a, 202a, 301a, 302a of the plurality of uneven groups 201, 202, 301, 302 in the heat transfer regions 200a, 200b, 300a, 300b of the heat transfer plates 2, 3 , One of the uneven groups 201, 202, 301, 302 in the heat transfer areas 200 a, 200 b, 300 a, 300 b of the opposing heat transfer plates 2, 3 adjacent in the X-axis direction. One of the convex portions 201a, 202a, 301a, and 302a of the first and second portions 301 and 302 is cross-imputed.

According to the above configuration, the first fluid A colliding with the protrusions 201a, 301a is applied to the heat transfer plates 2, 3 having the unevenness groups 201, 301 including the protrusions 201a, 301a. The second fluid B guided to the concave portions 201b, 301b of the three concavo- convex groups 201, 301 and colliding with the convex portions 202a, 302a receives the heat transfer plates 2, 3 having the concavo- convex groups 202, 302 including the convex portions 202a, 302a. Is guided to the concave portions 202b and 302b of the concave and convex groups 202 and 302 of the heat transfer plates 2 and 3 on the other side.

More specifically, the plurality of uneven groups 201, 202, 301, and 302 in the common heat transfer regions 200a, 200b, 300a, and 300b are inclined in the direction inclined with respect to the vertical center line CL1 (the virtual line VL extends). Direction), the projections 201a, 202a, 301a, 302a of the different concavo- convex groups 201, 202, 301, 302 extend in the direction in which the concavo- convex groups 201, 202, 301, 302 extend (the virtual line VL). (Extending direction). That is, the convex portions 201a, 202a, 301a, and 302a of the different concavo- convex groups 201, 202, 301, and 302 are arranged at intervals in a direction orthogonal to the direction in which the virtual line VL extends.

Accordingly, each of the protrusions 201a, 202a, 301a, and 302a included in the concavo- convex groups 201, 202, 301, and 302 has a different concavo- convex group 201, 202, 301, and 302 of the other heat transfer plates 2 and 3 respectively. One convex part 201a, 202a, 301a, 302a crosses. Accordingly, the convex portions 201a, 202a, 301a, and 302a of the adjacent heat transfer plates 2 and 3 cross abut with each other, and the concave portions 201b, 202b, 301b, and 302b of the adjacent heat transfer plates 2 and 3 form an interval. Cross in the open state.

Thus, when the first fluid A flowing along the concave portions 201b and 301b collides with the convex portions 201a and 301a to change the flow, the concave portions 201b and 301b (first fluid A enters the recesses 201b, 301b intersecting the recesses 201b, 301b that are side by side with the bumps 201a, 301a that collide, and flows along the recesses 201b, 301b of the heat transfer plates 2, 3 of the other party.

When the first fluid A flowing along the concave portions 201b and 301b of the mating heat transfer plates 2 and 3 collides with the convex portions 201a and 301a of the mating heat transfer plates 2 and 3 to change the flow. Into the concave portions 201b and 301b of the original heat transfer plates 2 and 3 (the concave portions 201b and 301b intersecting with the concave portions 201b and 301b arranged side by side with the convex portions 201a and 301a with which the first fluid A collides). It flows along the concave portions 201b and 301b of the plates 2 and 3. As described above, the first fluid A flows downstream while sequentially moving through the concave portions 201b and 301b of the adjacent heat transfer plates 2 and 3.

In the plate heat exchanger 1 according to the present embodiment, the concavo- convex groups 201, 202, 301, 302 (the convex portions 201a, 202a, 301a, 302a, the concave portions 201b, 202b, 301b, 302b) are arranged in the Z-axis direction. As described above, the first fluid extends along the imaginary line VL that is inclined with respect to the longitudinal center line CL1 that extends (extends in the flow direction of the first fluid A) (the concave portions 201b and 301b are elongated in the inclined direction). The first fluid A flows spirally as A flows downstream while sequentially moving through the concave portions 201b and 301b of the adjacent heat transfer plates 2 and 3. This flow (spiral flow) is the same for the second fluid B.

As described above, there is an opportunity for the first fluid A to flow through the recesses 201b and 301b in the first channel Ra, and there is an opportunity for the second fluid B to flow in the recesses 202b and 302b in the second channel Rb. This suppresses the increase in flow resistance. In addition, the first fluid A creates a spiral flow in the first flow path Ra, and the second fluid B creates a spiral flow in the second flow path Rb. As a result, the heat exchange performance (heat transfer performance) between the first fluid A and the second fluid B via the heat transfer plates 2 and 3 ( heat transfer regions 200a, 200b, 300a and 300b) is high. Become.

Further, in the plate heat exchanger 1 according to the present embodiment, the first fluid A creates a spiral flow in the first flow path Ra, and the second fluid B creates a spiral flow in the second flow path Rb. Since the respective flows of the first fluid A and the second fluid B are further turbulent, the turbulence of the flows exerts a mixing function.

Thereby, the plate heat exchanger 1 according to the present embodiment can prevent components contained in at least one of the first fluid A and the second fluid B from being separated in the flow process.

In addition, the plate heat exchanger 1 according to the present embodiment is configured such that a fluid in which two or more types of liquids are combined or one or more types of liquids and powders are supplied to one of the first channel Ra and the second channel Rb. By flowing the fluid combined with the body as the first fluid A or the second fluid B, two or more types of liquid constituting the first fluid A or the second fluid B, or one or more types of liquid and powder Can be mixed (mixed).

Therefore, the plate heat exchanger 1 according to the present embodiment can also function as a mixer that mixes a plurality of components contained in either the first fluid A or the second fluid B. That is, the plate heat exchanger 1 according to the present embodiment mixes the first fluid A and the second fluid B while mixing a plurality of components contained in either the first fluid A or the second fluid B. By performing heat exchange (heating or cooling either the first fluid A or the second fluid B), the reactor contained in the first fluid A or the second fluid B reacts with each other. Function.

In the present embodiment, the virtual line VL, which is a reference for the arrangement of the concavo- convex groups 201, 202, 301, and 302, is inclined at an angle of less than 45 ° with respect to the vertical center line CL1 extending in the Z-axis direction. The components in the direction extending in the longitudinal direction of the concave portions 201b, 202b, 301b, and 302b included in the concave and convex groups 201, 202, 301, and 302 are the component of the flow direction of the first fluid A and the second fluid B in the flow direction. Is included more than the component in the direction orthogonal to.

This facilitates the flow of the first fluid A in the first flow path Ra and the flow of the second fluid B in the second flow path Rb. That is, in each of the first flow path Ra and the second flow path Rb, an increase in flow resistance is suppressed.

As described above, according to the plate heat exchanger 1 according to the present embodiment, an excellent effect that high heat transfer performance can be obtained while suppressing an increase in fluid flow resistance can be achieved.

Note that the present invention is not limited to the above embodiments, and it is needless to say that modifications can be appropriately made without departing from the gist of the present invention.

In each of the above embodiments, the plurality of heat transfer plates 2 and 3 stacked in the first direction are brazed to each other, and the space between the heat transfer plates 2 and 3 is sealed in a liquid-tight manner. However, the present invention is not limited to this. For example, an annular gasket that defines a flow path between adjacent heat transfer plates 2 and 3 may be arranged, and the heat transfer plates 2 and 3 may be sealed by the gasket.

In each of the above embodiments, the plate heat exchanger 1 includes two types of heat transfer plates 2 and 3 in which the positions of the concavities and convexities of the concavo- convex groups 201, 202, 301, and 302 are different. , 3 (first heat transfer plate 2, second heat transfer plate 3) are alternately superposed, but the present invention is not limited to this.

For example, each of the projections 201a, 202a, 301a, and 302a of the plurality of uneven groups 201, 202, 301, and 302 in the heat transfer regions 200a, 200b, 300a, and 300b of the heat transfer plates 2 and 3 is arranged in the first direction. At least two of the uneven groups 201, 202, 301, 302 of the plurality of uneven groups 201, 202, 301, 302 in the heat transfer regions 200a, 200b, 300a, 300b of the adjacent heat transfer plates 2, 3 adjacent to each other. Cross-impact with the convex portions 201a, 202a, 301a, 302a, or the convex portions of the plurality of concave and convex groups 201, 202, 301, 302 in the heat transfer regions 200a, 200b, 300a, 300b of the heat transfer plates 2, 3. Each of 201a, 202a, 301a, and 302a is adjacent to each other in the first direction. Intersects with one convex portion 201a, 202a, 301a, 302a of one of the uneven groups 201, 202, 301, 302 of the plurality of uneven groups 201, 202, 301, 302 in the thermal regions 200a, 200b, 300a, 300b. Assuming that the position, size (length, width), interval (pitch), and the like of the unevenness of the unevenness groups 201, 202, 301, and 302 of the heat transfer plates 2 and 3 are set so as to abut each other. The same heat transfer plates 2 and 3 (common heat transfer plates 2 and 3) may be overlapped in the X-axis direction.

In this case, as in the above embodiments, when the plurality of heat transfer plates 2 and 3 are brazed to each other, since each heat transfer plate 2 and 3 includes the annular portions 21 and 31, X The heat transfer plates 2 and 3 are arranged by rotating every 180 degrees around an imaginary line extending in the X-axis direction in the axial direction. On the other hand, when an annular gasket that defines a flow path is arranged between the adjacent heat transfer plates 2 and 3 and the heat transfer plates 2 and 3 are sealed by the gasket, the heat transfer plates 2 and 3 Does not include the annular portions 21 and 31, the heat transfer plates 2 and 3 are alternately rotated by 180 ° about an imaginary line extending in the X-axis direction in the X-axis direction, or the vertical center line CL1 or the horizontal center. It is arranged to be inverted by 180 ° with reference to the line CL2 (center).

In each of the above embodiments, each of the convex portions 201a, 202a, 301a, 302a and the concave portions 201b, 202b, 301b, 302b included in the concave and convex groups 201, 202, 301, 302 of the heat transfer plates 2, 3 is arranged in the Z-axis direction. Although extending along the imaginary line VL inclined at an inclination angle of less than 45 ° with respect to the extending vertical center line CL1, the present invention is not limited to this.

For example, each of the convex portions 201a, 202a, 301a, 302a and the concave portions 201b, 202b, 301b, 302b included in the concavo- convex groups 201, 202, 301, 302 of the heat transfer plates 2, 3 has a vertical center line extending in the Z-axis direction. It may extend along an imaginary line VL inclined at an inclination angle of 45 ° or more with respect to CL1. However, since the virtual line VL must be inclined with respect to the vertical center line CL1 extending in the Z-axis direction, the virtual line VL is inclined by less than 90 ° with respect to the vertical center line CL1 extending in the Z-axis direction. Needless to say, this must be done.

In each of the above-described embodiments, the concave portions 201b, 202b, 301b, and 302b of the concave and convex groups 201, 202, 301, and 302 in which the convex portions 201a, 202a, 301a, and 302a of the plural concave and convex groups 201, 202, 301, and 302 are adjacent. Are arranged side by side in the Y-axis direction, and the concave portions 201b, 202b, 301b, 302b of the plurality of concave and convex groups 201, 202, 301, 302 are adjacent to the convex portions 201a, 202a of the concave and convex groups 201, 202, 301, 302. , 301a, and 302a are arranged side by side in the Y-axis direction, but are not limited thereto.

For example, the convex portions 201a, 202a, 301a, and 302a of the plurality of concavo- convex groups 201, 202, 301, and 302 are inclined with the concave portions 201b, 202b, 301b, and 302b of the adjacent concavo- convex groups 201, 202, 301, and 302, respectively. The concavo-convex group 201 is arranged side by side in the orthogonal direction (the combined direction of the Y-axis direction and the Z-axis direction), and the concave portions 201b, 202b, 301b, and 302b of the plural concavo- convex groups 201, 202, 301, and 302 are adjacent to each other. , 202, 301, 302 may be arranged side by side in a direction orthogonal to the inclination direction with respect to the projections 201a, 202a, 301a, 302a (the combined direction of the Y-axis direction and the Z-axis direction).

In the second embodiment, the concave portions 201b, 202b, 301b, 302b and the convex portions 201a, 202a, 301a, 302a of the concave and convex groups 201, 202, 301, 302 extend straight along the virtual line VL. It is not limited to. For example, as shown in FIGS. 21 and 22, in order to improve the continuity of the spiral flow of the first fluid A and the second fluid B, the concave portions 201b, 202b, 301b, 302b and the convex portions 201a, 202a, 301a, 302a are formed. Each may be formed in a curved shape (S-shape or inverted S-shape) when viewed from the X-axis direction.

Although not particularly mentioned in each of the above embodiments, as described above, when the plate heat exchanger 1 is caused to function as a mixer, the plate heat exchanger 1 may be connected to one of the first series passages Ra1 or one of the second communication passages Rb1. On the other hand, a fluid in which two or more kinds of liquids to be mixed are combined, or a fluid in which one or more kinds of liquids and powder are combined may be supplied as the first fluid A or the second fluid B. In addition, two or more of one of the first series passages Ra1 or the one second communication passage Rb1 as a supply source of the fluid are provided, and a liquid or the like to be mixed is supplied to each of them. You may make it join in the path | route Ra or the 2nd flow path Rb, and let it flow as the 1st fluid A or the 2nd fluid B in either the 1st flow path Ra or the 2nd flow path Rb.

DESCRIPTION OF SYMBOLS 1 ... Plate type heat exchanger, 2 ... 1st heat transfer plate (heat transfer plate), 3 ... 2nd heat transfer plate (heat transfer plate), 20, 30 ... Heat transfer part, 20a, 30a ... Main heat transfer part .., 20b, 30b end portions, 21, 31 annular portions, 200a, 200b, 300a, 300b heat transfer regions, 201, 202, 301, 302 uneven portions, 201a, 202a, 301a, 302a convex portions, 201b , 202b, 301b, 302b: recess, 203, 204, 303, 304: through hole, A: first fluid, B: second fluid, CL1: vertical center line (center line), CL2: horizontal center line (center line) ), Ra: first flow path, Ra1, Ra2: first communication path, Rb: second flow path, Rb1, Rb2: second communication path, S1: first surface, S2: second surface, VL: virtual line, θ1 ... inclination angle, θ2 ... inclination angle

Claims (4)

1. A heat transfer plate including heat transfer regions on both surfaces in the first direction, wherein each heat transfer region includes a plurality of heat transfer plates superimposed in the first direction, with each of the plurality of heat transfer plates as a boundary. Thus, a first flow path for flowing the first fluid in a second direction orthogonal to the first direction and a second flow path for flowing the second fluid in the second direction are formed alternately in the first direction, and heat transfer is performed. The region includes protrusions and recesses having a length in a direction inclined with respect to its own center line extending in the second direction, and the protrusions and recesses are arranged alternately along a virtual line extending in the inclination direction. A plurality of concavo-convex groups arranged in a direction perpendicular to the tilting direction, and each convex portion of the plurality of concavo-convex groups is a concave portion of a concavo-convex group adjacent in a direction perpendicular to the tilting direction. Are arranged side by side with respect to each other, Each concave portion is arranged side by side with respect to the convex portion of the concavo-convex group adjacent in the direction orthogonal to the inclined direction, and the heat transfer plate adjacent to the heat transfer region facing the heat transfer region is formed of the concavo-convex group of each other. A plate-type heat exchanger characterized in that convex portions are cross-butted with each other.
2. Each of the protrusions of the plurality of unevenness groups in the heat transfer area of the heat transfer plate is at least two of the unevenness groups of the plurality of unevenness groups in the heat transfer area of the opposing heat transfer plate in the first direction. The plate heat exchanger according to claim 1, wherein the plate heat exchanger cross-impacts with the projection.
3. Each of the protrusions of the plurality of unevenness groups in the heat transfer area of the heat transfer plate is one of the unevenness groups of the plurality of unevenness groups in the heat transfer area of the adjacent heat transfer plate in the first direction. The plate heat exchanger according to claim 1, wherein the plate heat exchanger is cross-imputed with the two convex portions.
4. The plate heat exchanger according to any one of claims 1 to 3, wherein a virtual line serving as a reference for the arrangement of the unevenness group is inclined at an angle of less than 45 ° with respect to a center line extending in the second direction. .

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