JP2021124242A - Plate type heat exchanger - Google Patents

Abstract

To provide a plate type heat exchanger capable of obtaining sufficient heat exchange performance even when a first liquid and a second liquid having different characteristics are heat-exchanged.SOLUTION: A plate type heat exchanger includes a plurality of heat transfer plate pairs which have first surfaces and second surfaces and in which the first surfaces are overlapped in a first direction so as to oppose each other. The plurality of heat transfer plate pairs form first flow channels between the first surfaces and second flow channels between the second surfaces by overlapping the second surfaces so as to oppose each other. By repeating irregularities so that a bottom and a top extending along a second direction in each of the opposed first surfaces are alternately aligned in a third direction, each of the heat transfer plate pairs has a plurality of top pairs constituted by the opposed tops and aligned in the third direction. The opposed tops are opposed to each other at an interval in at least one top pair among the plurality of top pairs, and the opposed tops are abutted on each other in the remaining top pairs.SELECTED DRAWING: Figure 13

Description

The present invention relates to a plate heat exchanger in which a plurality of heat transfer plates are superposed.

Conventionally, as shown in FIG. 20, a plate-type heat exchanger 500 in which a plurality of heat transfer plates 501 are stacked and summed is known (see Patent Document 1). Specifically, in each heat transfer plate 501, the concave portion on one surface and the convex portion on the other surface have a front-back relationship, and the convex portion on one surface and the concave portion on the other surface have a front-back relationship. In addition, concave portions and convex portions of the same size that are alternately repeated are arranged on both sides. Then, by superimposing the heat transfer plates 501, in the stacking direction of the heat transfer plates 501, the first flow path Ra through which the first fluid can flow and the second flow path Rb through which the second fluid can flow can be arranged. , Alternately formed through each heat transfer plate 501. The flow path cross-sectional areas of the first flow path Ra and the second flow path Rb are the same.

In this plate heat exchanger 500, the first fluid flows through the first flow path Ra and the second fluid flows through the second flow path Rb, so that the first flow path Ra and the second flow path Rb are separated from each other. The first fluid and the second fluid exchange heat through the heat plate 501.

Utility Model Registration No. 3222546

In the above plate type heat exchanger 500, when, for example, a fluid whose layer changes by heat exchange (a fluid having different characteristics from the second fluid) is used as one fluid (first fluid), the first fluid is the second. Since a liquid film is formed on the surface of the heat transfer plate 501 that defines the first flow path by exchanging heat with the fluid, in order to obtain sufficient heat exchange performance, the first fluid in the first flow path Ra It is necessary to disturb the flow of the liquid film by increasing the flow velocity as compared with the flow velocity of the second fluid in the second flow path Rb.

However, since the flow path cross-sectional area of the first flow path Ra and the second flow path Rb is the same, it is difficult to make the flow velocity of the first fluid sufficiently larger than the flow velocity of the second fluid, that is, with the first fluid. A sufficient difference in flow velocity from the second fluid did not occur, and as a result, sufficient heat exchange performance could not be obtained in the above-mentioned plate heat exchanger 500.

Therefore, it is an object of the present invention to provide a plate type heat exchanger capable of obtaining sufficient heat exchange performance even when heat exchange between a first fluid and a second fluid having different characteristics.

The plate heat exchanger of the present invention
Two transmissions that have a first surface and a second surface opposite to the first surface, and are superposed so that the first surfaces face each other in the first direction orthogonal to the first surface. Equipped with multiple heat transfer plate pairs composed of heat plates
In a state where the plurality of heat transfer plate pairs are superposed so that the second surfaces face each other in the first direction, the first fluid is orthogonal to the first direction between the first surfaces facing each other. A first flow path that can flow in two directions is formed, and a second flow path that allows the second fluid to flow in the second direction is formed between the two opposing surfaces.
In each of the plurality of heat transfer plates included in the plurality of heat transfer plate pairs,
The first surface has at least one first surface side ridge extending along the second direction and at least one first surface side recess extending along the second direction.
The second surface has at least one second surface side recess having a front and back relationship with the first surface side convex groove on the first surface, and a front and back relationship between the first surface side recess on the first surface. Has at least one second side ridge in
In each heat transfer plate pair, the third direction in which the first surface side convex and the first surface side concave are orthogonal to each of the first direction and the second direction on each of the facing first surfaces. By alternately arranging the ridges in the third direction, a plurality of ridge pairs composed of the ridges on the first surface side facing each other are lined up in the third direction.
In the first ridge pair, which is at least one of the plurality of ridge pairs arranged in the third direction, the facing first surface side ridges face each other with a gap in the first direction. However, in the second ridge pair, which is the remaining ridge pair among the plurality of ridge pairs, the facing first surface side ridges are in contact with each other.

In this way, in the first ridge pair, the first surface side ridges face each other with a gap, so that the first flow path is formed as compared with the case where the first surface side ridges facing each other at the position are in contact with each other. Since the distance between the specified heat transfer plates (first surface) in the first direction is increased, the cross-sectional area of the first flow path is increased, and the position corresponding to the first ridge pair (that is, the same in the third direction) is increased. Since the distance in the first direction of the heat transfer plate (second surface) that defines the second flow path at the position) becomes smaller, the flow path cross-sectional area of the second flow path becomes smaller, and thus the first flow path and the first flow path. The difference in the cross-sectional area of the flow path from the second flow path becomes large. Therefore, it becomes easy to increase the difference between the flow velocity of the first fluid flowing through the first flow path and the flow velocity of the second fluid flowing through the second flow path, and as a result, heat exchange between the first fluid and the second fluid having different characteristics. Sufficient heat exchange performance can be obtained even when the fluid is allowed to flow.

In the plate heat exchanger,
The first surface side ridges constituting the first ridge pair may have at least one groove portion that crosses the first surface side ridges in the third direction at an intermediate position in the second direction. good.

As described above, by providing the rib-shaped portion (groove portion) on the first surface side convex strip forming the first convex strip pair, the strength of the portion can be improved.

Further, in the plate heat exchanger,
Each of the plurality of second surface side ridges on one of the two opposing second surfaces and the plurality of second surface side ridges on the other second surface of the opposite second surfaces. Each of the above may be arranged at a position deviated in the third direction so as not to come into contact with each other.

According to such a configuration, in the facing second surfaces, the ridges on the opposite second surface sides are displaced from each other in the third direction so as not to contact each other, so that the second flow formed between the facing second surfaces is formed. When the second fluid flows in the second direction through the path, the second fluid can also move in the third direction, which suppresses the bias in the third direction in the flow (flow rate) of the second fluid, and as a result. , It is possible to prevent a decrease in heat exchange performance due to the bias.

in this case,
The second surface side convex of the one second surface faces the second surface side concave of the other second surface, and the second surface side concave of the one second surface faces the other. It is preferable to face the second surface side ridge on the second surface of the above.

According to such a configuration, the second flow path extends in the third direction so as to meander when viewed from the second direction (see FIG. 13), whereby, at each position in the third direction, the second surfaces facing each other extend. Since the interval (interval in the first direction) is constant or substantially constant, the bias in the third direction in the flow of the second fluid is further suppressed, whereby the deterioration of the heat exchange performance due to the bias is more reliably performed. Can be prevented.

Further, in the plate heat exchanger,
At least one second surface of the opposing second surfaces has at least one barrier ridge extending in a direction intersecting the second direction.
The barrier ridge may come into contact with the plurality of second surface side ridges on the second surface on the other side.

According to this configuration, when the second fluid flows along the second flow path, specifically, the second surface side concave groove, it collides with the barrier ridge and is disturbed by the flow of the second fluid (turbulent flow, etc.). Therefore, the heat exchange performance is improved.

in this case,
The at least one barrier ridge is arranged on each of the opposing second surfaces.
The at least one barrier ridge on the one second surface of the opposing second surface and the at least one barrier ridge on the other second surface of the opposing second surface. Is preferably arranged at different positions in the second direction.

When the respective barrier ridges on the facing second surfaces are arranged at the same position in the second direction, the flow path width (dimension in the first direction) of the second flow path at this position becomes smaller or disappears, and the second The flow resistance of the flow path becomes too large. However, as in the above configuration, the flow path width at each position is secured by different positions of the barrier ridge on one second surface and the barrier ridge on the other second surface in the second direction. The second fluid collides with each of the barrier ridges provided on each of the second surface of one side and the second surface of the other while preventing the flow resistance of the second flow path from becoming too large. Can cause sufficient turbulence in the flow of the second fluid in the second flow path.

Moreover,
It is more preferable that the positions of the tops of the barrier ridges and the tops of the two side ridges in the first direction on each of the facing second surfaces are the same.

According to such a configuration, there is no region communicating in the second direction in the second flow path, that is, a region through which the second fluid can pass without colliding with the heat transfer plate when flowing in the second direction (FIG. FIG. 13), it is possible to prevent the occurrence of the bias of the flow of the second fluid, and thereby it is possible to prevent the deterioration of the heat exchange performance due to the bias of the flow.

From the above, according to the present invention, it is possible to provide a plate type heat exchanger that can obtain sufficient heat exchange performance even when heat exchange is performed between the first fluid and the second fluid having different characteristics.

FIG. 1 is a perspective view of a plate heat exchanger according to the present embodiment. FIG. 2 is an exploded perspective view of the plate type heat exchanger. FIG. 3 is a view of the first heat transfer plate included in the plate heat exchanger as viewed from the front surface side. FIG. 4 is a view of the first heat transfer plate viewed from the second surface side. FIG. 5 is a view of the second heat transfer plate included in the plate heat exchanger as viewed from the front surface side. FIG. 6 is a view of the second heat transfer plate viewed from the second surface side. FIG. 7 is an enlarged view of the enclosed portion shown by VII in FIG. FIG. 8 is an enlarged view of the enclosed portion shown by VIII in FIG. FIG. 9 is a cross-sectional view taken at the IX-IX position in FIG. FIG. 10 is an enlarged view of the enclosed portion indicated by X in FIG. FIG. 11 is an enlarged view of the enclosed portion indicated by XI in FIG. FIG. 12 is a cross-sectional view taken along the line XII-XII in FIG. FIG. 13 is a partially enlarged view of a cross section of a state in which a plurality of heat transfer plates are superposed. FIG. 14 is a cross-sectional view taken along the line XIV-XIV in FIG. FIG. 15 is a diagram for explaining a flow path configuration of the plate heat exchanger. FIG. 16 is a diagram showing the flow of the first fluid in the first flow path. FIG. 17 is a diagram showing the flow of the second fluid in the second flow path. FIG. 18 is a partially enlarged view of a main heat transfer portion in the heat transfer plate according to another embodiment. FIG. 19 is a cross-sectional view taken at the XIX-XIX position in FIG. FIG. 20 is a vertical cross-sectional view of a conventional plate heat exchanger.

Hereinafter, an embodiment of the present invention will be described with reference to FIGS. 1 to 17.

As shown in FIGS. 1 and 2, the plate heat exchanger according to the present embodiment (hereinafter, also simply referred to as “heat exchanger”) has a plurality of heat transfer plates 2, 3 which are superposed in a predetermined direction. To be equipped with. Further, the heat exchanger 1 includes a pair of frame plates (end plates) 4 that sandwich the plurality of heat transfer plates 2 and 3 from the outside in the predetermined direction. Flow paths Ra and Rb through which fluids A and B can flow are formed between the heat transfer plates 2 and 3 in the plurality of heat transfer plates 2 and 3. The specific configuration is as follows.

The heat exchanger 1 of the present embodiment includes three or more rectangular heat transfer plates 2 and 3, and these three or more heat transfer plates 2 and 3 include two types of heat transfer plates. In the following description, one of the two types of heat transfer plates 2 and 3 is also referred to as the first heat transfer plate 2, and the other heat transfer plate of the two types of heat transfer plates 2 and 3 is referred to as the first heat transfer plate 2. Also referred to as the second heat transfer plate 3. Further, the direction in which the heat transfer plates 2 and 3 are overlapped (predetermined direction) is the X-axis direction (first direction) of the Cartesian coordinate system, and the short side direction of the heat transfer plates 2 and 3 is the Y-axis of the Cartesian coordinate system. The direction is defined as the direction (third direction), and the long side direction of the heat transfer plates 2 and 3 is defined as the Z-axis direction (second direction) of the Cartesian coordinate system.

These two types of heat transfer plates, that is, the first heat transfer plate 2 and the second heat transfer plate 3, have a common configuration. Therefore, in the following, first, the common configuration of the first heat transfer plate 2 and the second heat transfer plate 3 will be described.

As shown in FIGS. 2 to 6, the heat transfer plates 2 and 3 are heat transfer portions having first surfaces Sa1 and Sb1 and second surfaces Sa2 and Sb2 opposite to the first surfaces Sa1 and Sb1. 20 and 30 and annular fitting portions 21 and 31 extending from the entire outer peripheral edge of the heat transfer portions 20 and 30 in a direction intersecting the heat transfer portions 20 and 30. The heat transfer plates 2 and 3 of the present embodiment are formed by press-molding a metal plate (thin plate).

The heat transfer portions 20 and 30 spread in a direction orthogonal to the X-axis direction and have a thickness in the X-axis direction. Therefore, the first surfaces Sa1 and Sb1 and the second surfaces Sa2 and Sb2 of the heat transfer portions 20 and 30 of the plurality of heat transfer plates 2 and 3 superposed in the X-axis direction are arranged in the X-axis direction. The heat transfer portions 20 and 30 of the present embodiment have a long rectangular shape in the Z-axis direction when viewed from the X-axis direction (see FIGS. 3 to 6).

Further, the heat transfer portions 20 and 30 have concave portions 22 and 32 and convex portions 23 and 33. The heat transfer portions 20 and 30 of the present embodiment have a plurality of concave portions 22 and 32 and a plurality of convex portions 23 and 33 on the first surfaces Sa1 and Sb1 and the second surfaces Sa2 and Sb2, respectively.

The heat transfer plates 2 and 3 of the present embodiment are formed by press-molding a metal plate as described above. Therefore, the concave portions 22 and 32 of the first surfaces Sa1 and Sb1 of the heat transfer portions 20 and 30 and the convex portions 23 and 33 of the second surfaces Sa2 and Sb2 of the heat transfer portions 20 and 30 are in a front-to-back relationship. .. Further, the convex portions 23 and 33 of the first surfaces Sa1 and Sb1 of the heat transfer portions 20 and 30 and the concave portions 22 and 32 of the second surfaces Sa2 and Sb2 of the heat transfer portions 20 and 30 are in a front-to-back relationship. That is, in the heat transfer portions 20 and 30, the portions forming the concave portions 22 and 32 on the first surfaces Sa1 and Sb1 form the convex portions 23 and 33 on the second surfaces Sa2 and Sb2, and the convex portions 23 and 33 are formed on the first surfaces Sa1 and Sb1. The portions forming the portions 23 and 33 form the recesses 22 and 32 with the second surfaces Sa2 and Sb2.

Specifically, the heat transfer portions 20 and 30 have an opening peripheral edge having main heat transfer portions 25 and 35 arranged in the center in the Z-axis direction and openings 200, 201, 202, 203, 300, 301, 302 and 303. It is arranged between the main heat transfer portions 25, 35 and the opening peripheral portion 200p, 201p, 202p, 203p, 300p, 301p, 302p, 303p. It has a weir portion 26, 36 and the like.

The heat transfer portions 20 and 30 of the present embodiment have at least two openings 200, 201, 202, 203, 300, 301, 302 and 303 at one end and the other end in the Z-axis direction, respectively. More specifically, the heat transfer portions 20 and 30 have two openings 200, 203, 300 and 303 at one end in the Z-axis direction and two openings 201, 202 and 301 at the other end in the Z-axis direction. , 302.

The two openings 200, 203, 300, and 303 at one end of the heat transfer portions 20 and 30 are arranged at intervals in the Y-axis direction. Further, the two openings 201, 202, 301 and 302 at the other ends of the heat transfer portions 20 and 30 are arranged at intervals in the Y-axis direction.

The opening peripheral portions 200p and 300p of one opening 200 and 300 at one end of the heat transfer portions 20 and 30 and the opening peripheral edges 201p and 301p of one opening 201 and 301 at the other end of the heat transfer portions 20 and 30 , The first surface is dented when viewed from the Sa1 and Sb1 sides. On the other hand, the opening peripheral edges 200p, 201p, 300p, and 301p are bulging when viewed from the second surface Sa2 and Sb2 side.

The amount of displacement (position in the X-axis direction) of each of the opening peripheral edges 200p, 201p, 300p, and 301p that bulges from the side of the second surface Sa2 and Sb2 in the X-axis direction is the amount of displacement (position in the X-axis direction) of the adjacent heat transfer plates 2 and 3. It is set to come into contact with the opening peripheral portions 200p, 201p, 300p, and 301p.

On the other hand, the opening peripheral edges 203p and 303p of the other openings 203 and 303 at one end of the heat transfer portions 20 and 30, and the opening peripheral edges of the other openings 202 and 302 at the other ends of the heat transfer portions 20 and 30. 202p and 302p are bulging when viewed from the front surface Sa1 and Sb1 sides. On the other hand, the opening peripheral edges 202p, 203p, 302p, and 303p are recessed when viewed from the second surface Sa2, Sb2 side.

The amount of displacement (position in the X-axis direction) of each of the opening peripheral edges 202p, 203p, 302p, 303p that bulges when viewed from the first surface Sa1 and Sb1 side is the heat transfer plates 2 and 3 adjacent to each other. It is set to abut the opening peripheral edges 202p, 203p, 302p, and 303p. In addition, in FIGS. 3 to 6, in order to clarify the uneven relationship on each of the first surface Sa1, Sb1 and the second surface Sa2, Sb2, the recessed opening peripheral edges 200p, 201p, 202p, 203p, 300p, 301p. , 302p, 303p, and the bottom (most recessed part) of the recessed portions (first surface side recesses 225, 325 and second surface side recesses 226, 326 described later) in the weir portions 26, 36. doing.

In the heat transfer portions 20 and 30 of the present embodiment, one opening 200, 300 at one end in the Z-axis direction and one opening 201, 301 at the other end in the Z-axis direction are diagonally positioned. be. Further, the other openings 203 and 303 at one end in the Z-axis direction and the other openings 202 and 302 at the other end in the Z-axis direction are at diagonal positions.

The main heat transfer portions 25 and 35 are rectangular portions when viewed from the X-axis direction. As shown in FIGS. 3, 5, 7, 9, 10, and 12, at least one of the main heat transfer portions 25 and 35 extends along the Z-axis direction on the first surfaces Sa1 and Sb1. One first flow path forming recess (first surface side concave) 221 and 321 and at least one first flow path forming convex (first surface side convex) 231 and 331 extending along the Z-axis direction. , With at least one barrier backside recess 223, 323 extending in a direction intersecting the Z-axis direction. The main heat transfer portions 25, 35 of the present embodiment include a plurality of first flow path forming recesses 221 and 321 and a plurality of first flow path forming protrusions 231 and 331 on the first surfaces Sa1 and Sb1. It has recesses 223 and 323 on the back side of the barrier. The plurality of first flow path forming recesses 221 and 321 and the plurality of barrier backside recesses 223 and 323 are included in the plurality of recesses 22 and 32 of the heat transfer portions 20 and 30 described above. Further, the plurality of protrusions 231 and 331 for forming the first flow path are included in the plurality of protrusions 23 and 33 of the heat transfer portions 20 and 30 described above.

In addition, in FIGS. 7 and 10, in order to clarify the unevenness relationship on the first surfaces Sa1 and Sb1, the bottoms (most concaves) of the recessed first flow path forming recesses 221 and 321 and the barrier backside recesses 223 and 323 are recessed. Dots are attached to the part).

Each of the plurality of barrier backside recesses 223 and 323 extends continuously from one end to the other end of the main heat transfer portions 25 and 35 in the Y-axis direction. Each of the plurality of barrier backside recesses 223 and 323 of the present embodiment extends straight in the Y-axis direction.

The plurality of barrier backside recesses 223 and 323 are arranged at intervals in the Z-axis direction. The plurality of barrier backside recesses 223 and 323 of the present embodiment are evenly spaced in the Z-axis direction except for the barrier backside recesses 223A and 323A arranged at one end in the Z-axis direction (upper end in FIGS. 3 and 5). Have been placed. The distance between the barrier backside recesses 223A and 323A arranged at one end of the barrier backside recesses 223A and 323A and the barrier backside recesses 223A and 323 adjacent to the barrier backside recesses 223A and 323A in the Z-axis direction is in the Z-axis direction at other positions. The distance between the adjacent dents 223 and 323 on the back side of the barrier is half or approximately half.

The plurality of barrier backside recesses 223 and 323 arranged in this way have a plurality of regions (first surface side divided regions) in which the main heat transfer portions 25 and 35 are arranged in the Z-axis direction on the first surface Sa1 and Sb1 sides. ) Divide into D1. The barrier back side recesses 223 and 323 of the present embodiment are, for example, six, and the main heat transfer portions 25 and 35 are divided into seven first surface side division regions D1.

In each of the plurality of first surface side division regions D1, a plurality of first flow path forming recesses 221 and 321 are respectively extended in the Z-axis direction and arranged at intervals in the Y-axis direction, and the plurality of first flow paths are arranged. Each of the forming ridges 231 and 331 extends in the Z-axis direction between the first flow path forming dents 221 and 321 adjacent to each other in the Y-axis direction. That is, in each of the first surface side divided regions D1, the first flow path forming recesses 221 and 321 and the first flow path forming protrusions 231 and 331 are alternately arranged in the Y-axis direction.

Each of the plurality of first flow path forming recesses 221 and 321 and the plurality of first flow path forming protrusions 231 and 331 extend from one end to the other end in the Z-axis direction in the first surface side division region D1. There is. Therefore, the ends of the barrier backside recesses 223 and 323 in the first flow path forming recesses 221 and 321 are connected to the barrier backside recesses 223 and 323.

Further, in the first surface side divided region D1, the depths of the first flow path forming recesses 221 and 321 and the depths of the barrier backside recesses 223 and 323 are the same. That is, the positions of the bottoms of the first flow path forming recesses 221 and 321 in the X-axis direction and the positions of the bottoms of the barrier backside recesses 223 and 323 in the X-axis direction are the same.

In each of the first surface side division regions D1 of the present embodiment, the center position of the first flow path forming recesses 221 and 321 in the Y-axis direction and the center position of the first flow path forming protrusions 231 and 331 in the Y-axis direction. The first flow path forming recesses 221 and 321 and the first flow path forming protrusions 231 and 331 are alternately arranged in the Y-axis direction so that the two are at equal intervals (same pitch) (FIG. 7, FIG. 9), 10 and 12). Then, the first flow path forming ridges 221 and 321 arranged alternately and the first flow path forming ridges 231 and 331 are located in the center of the uneven group formed by the first flow path forming ridges 231 and 331 in the Y-axis direction. The center position of 231 and 331 in the Y-axis direction is shifted by 1/2 pitch in the Y-axis direction with respect to the vertical center line CL extending in the Z-axis direction at the center position of the heat transfer portions 20 and 30 in the Y-axis direction. The uneven group is arranged (see FIGS. 3 and 5). The 1 pitch is the distance between the central positions of the adjacent first flow path forming recesses 221 and 321 and the first flow path forming protrusions 231 and 331 (reference numerals P in FIGS. 9 and 12). reference).

Further, the plurality of first flow path forming protrusions 231 and 331 arranged in each first surface side dividing region D1 have two types of first flow path forming protrusions having different positions (heights) of the tops in the X-axis direction. Articles, specifically, the first ridges for forming the first flow path (hereinafter referred to as "first ridges") 231A and 331A, and the second first flow path higher than the first ridges 231A and 331A. Includes forming ridges (hereinafter referred to as "second ridges") 231B and 331B.

In each first surface side division region D1, the second ridges 231B and 331B are arranged every other one with respect to the first ridges 231A and 331A. That is, one first ridge 231A and one 331A are arranged between the second ridges 231B and 331B adjacent to each other in the Y-axis direction.

In the main heat transfer portions 25 and 35 of the present embodiment, the configuration of each first surface side divided region D1 is the same. Therefore, the first ridges 231A and 331A of each first surface side division area D1 are arranged straight in the Z-axis direction (that is, they are arranged on the same straight line), and the second ridges of each first surface side division area D1 are arranged. 231B and 331B are arranged straight in the Z-axis direction, and the first flow path forming recesses 221 and 321 of each first surface side dividing region D1 are arranged straight in the Z-axis direction.

Further, as shown in FIGS. 4, 6, 8, 9, 11, and 12, the main heat transfer portions 25 and 35 have the first surfaces Sa1 and Sb1 on the second surfaces Sa2 and Sb2. The second flow path forming recesses (second surface side recesses) 222 and 322 formed on the back side of the first flow path forming protrusions 231 and 331, and the first flow path forming recesses on the first surfaces Sa1 and Sb1. It has ridges 232 and 332 for forming a second flow path (convex on the second surface side) formed on the back side of the strips 221 and 321. Further, the main heat transfer portions 25 and 35 have barrier ridges 233 and 333 formed on the back side of the barrier back side recesses 223 and 323 of the first surfaces Sa1 and Sb1 on the second surfaces Sa2 and Sb2. That is, the main heat transfer portions 25 and 35 have at least one second flow path forming recess 222 and 222 extending along the Z-axis direction and at least one extending along the Z-axis direction on the second surfaces Sa2 and Sb2. It has one second flow path forming ridge 232, 332, and the like. Further, the main heat transfer portions 25 and 35 have at least one barrier ridge 233,333 extending in a direction intersecting the Z-axis direction on the second surfaces Sa2 and Sb2. The main heat transfer portions 25 and 35 of the present embodiment have a plurality of recesses 222 and 322 for forming the second flow path and a plurality of protrusions 232 and 332 for forming the second flow path on the second surfaces Sa2 and Sb2. , With a plurality of barrier ridges 233,333. The plurality of recesses 222 and 222 for forming the second flow path are included in the plurality of recesses 22 and 32 of the heat transfer portions 20 and 30 described above. Further, the plurality of ridges 232 and 332 for forming the second flow path and the plurality of ridges 233 and 333 for barriers are included in the plurality of protrusions 23 and 33 of the heat transfer portions 20 and 30 described above.

In addition, in FIGS. 8 and 11, in order to clarify the unevenness relationship on the first surfaces Sa1 and Sb1, the bottoms (most concaves) of the recessed first flow path forming recesses 221 and 321 and the barrier backside recesses 223 and 323 are recessed. Dots are attached to the part).

Each of the plurality of barrier ridges 233 and 333 extends continuously from one end to the other end in the Y-axis direction of the main heat transfer portions 25 and 35. Each of the plurality of barrier ridges 233,333 of the present embodiment extends straight in the Y-axis direction.

These plurality of barrier ridges 233 and 333 are arranged at intervals in the Z-axis direction. The plurality of barrier ridges 233, 333 of the present embodiment are evenly spaced in the Z-axis direction, except for the barrier ridges 233A and 333A arranged at one end (upper end in FIGS. 4 and 6) in the Z-axis direction. Have been placed. The distance between the barrier ridges 233A and 333A arranged at one end of the barrier ridges 233A and 333A and the barrier ridges 233 and 333 adjacent to the barrier ridges 233A and 333A in the Z-axis direction is the Z axis at other positions. The distance between the barrier ridges 233 and 333 adjacent to each other in the direction is half or approximately half.

The plurality of barrier ridges 233, 333 arranged in this way have a plurality of regions (second surface side divided regions) in which the main heat transfer portions 25 and 35 are arranged in the Z-axis direction on the second surface Sa2 and Sb2 sides. ) Divide into D2. Six barrier ridges 233 and 333 of the present embodiment are arranged, for example, and the main heat transfer portions 25 and 35 are divided into seven second surface side division regions D2. Each second surface side division area D2 of the present embodiment is formed on the back side of the corresponding first surface side division area D1 in the plurality of first surface side division areas D1 of the first surface Sa1 and Sb1.

In each of the plurality of second surface side division regions D2, the plurality of recesses 222 and 222 for forming the second flow path are respectively extended in the Z-axis direction and arranged at intervals in the Y-axis direction, and the plurality of second passages are arranged. Each of the flow path forming protrusions 232 and 332 extends in the Z-axis direction between the second flow path forming recesses 222 and 322 adjacent to each other in the Y-axis direction. That is, in each of the second surface side divided regions D2, the recesses 222 and 322 for forming the second flow path and the ridges 232 and 332 for forming the second flow path are alternately arranged in the Y-axis direction.

Each of the plurality of recesses 222 and 322 for forming the second flow path and the plurality of protrusions 232 and 332 for forming the second flow path are from one end to the other end in the Z-axis direction in the second surface side division region D2. It is extending. Therefore, the ends of the ridges 232 and 332 for forming the second flow path on the side of the ridges 233 and 333 for the barrier are connected to the ridges 233 and 333 for the barrier.

Further, in the second surface side divided region D2, the heights of the ridges 232 and 332 for forming the second flow path and the heights of the ridges 233 and 333 for the barrier are the same. That is, the positions of the tops of the second flow path forming ridges 232 and 332 in the X-axis direction and the positions of the tops of the barrier ridges 233 and 333 in the X-axis direction are the same.

In each of the second surface side division regions D2 of the present embodiment, the central position of the second flow path forming recess 222 and 322 in the Y-axis direction and the second flow path forming protrusion 232 and 332 in the Y-axis direction. The recesses 222 and 322 for forming the second flow path and the protrusions 232 and 332 for forming the second flow path are alternately arranged in the Y-axis direction so that the central positions are at equal intervals (same pitch). (See FIGS. 8, 9, 11, and 12). Then, for forming the second flow path, which is located at the center in the Y-axis direction of the concavo-convex group composed of the dents 222 and 322 for forming the second flow path and the ridges 232 and 332 for forming the second flow path that are alternately arranged. The concavo-convex group is arranged so that the center position of the recesses 222 and 222 in the Y-axis direction is deviated by 1/2 pitch in the Y-axis direction with respect to the vertical center lines CL of the heat transfer portions 20 and 30 (FIG. 4 and FIG. 6). The one pitch is the distance between the central positions of the adjacent second flow path forming recesses 222 and 322 and the second flow path forming protrusions 232 and 332 (FIGS. 9 and 12). See symbol P).

Further, the plurality of second flow path forming recesses 222 and 222 arranged in each second surface side division region D2 form two types of second flow paths having different positions (depths) in the X-axis direction of the bottom portion. Recesses, specifically, the first recess for forming the second flow path (hereinafter referred to as "first recess") 222A, 222A and the second recess deeper than the first recess 222A, 222A. Includes a second flow path forming recess (hereinafter referred to as "second recess") 222B and 222B. The first dents 222A and 322A are formed on the back side of the first ridges 231A and 331A of the first surfaces Sa1 and Sb1, and the second ridges 222B and 322B are the second ridges of the first surfaces Sa1 and Sb1. It is formed on the back side of 231B and 331B.

In each second surface side division region D2, the second recess 222B and 222B are arranged every other one with respect to the first recess 222A and 222A. That is, one first recess 222A and one 222A is arranged between the second recesses 222B and 222B adjacent to each other in the Y-axis direction.

In the main heat transfer portions 25 and 35 of the present embodiment, the configuration of each second surface side divided region D2 is the same. Therefore, the first recesses 222A and 322A of each second surface side division area D2 are arranged straight in the Z-axis direction (that is, they are arranged on the same straight line), and the second recesses of each second surface side division area D2 are arranged. 222B and 222B are arranged straight in the Z-axis direction, and the ridges 232 and 332 for forming the second flow path of each second surface side dividing region D2 are arranged straight in the Z-axis direction.

As shown in FIGS. 3 to 6, the weir portions 26 and 36 are arranged on one side and the other side of the main heat transfer portions 25 and 35 in the Z-axis direction in the heat transfer portions 20 and 30, respectively. That is, the heat transfer portions 20 and 30 have a pair of weir portions 26 and 36. Each of the weirs 26 and 36 of the present embodiment has two openings arranged at one end or the other end in the Z-axis direction of the heat transfer portions 20 and 30 with the boundary with the main heat transfer portions 25 and 35 as the base. It is a triangular portion having an intermediate position of 200, 201, 202, 203, 300, 301, 302, and 303 as an apex.

Each of these pair of weir portions 26, 36 has openings 200, 201, 202, 203, 300, 301, 302, 303 along the first surface Sa1, Sb1 or the second surface Sa2, Sb2 to the main heat transfer portion 25. , The flow of the fluids A and B toward 35 is diffused in the Y-axis direction, or the openings 200, 201 and 202 are opened from the main heat transfer portions 25 and 35 along the first surface Sa1, Sb1 or the second surface Sa2 and Sb2. , 203, 300, 301, 302, 303 to focus the flows of fluids A and B in the Y-axis direction (see FIGS. 16 and 17).

Specifically, each of the weir portions 26, 36 has a plurality of first surface side concave portions 225 and 325 and a plurality of first surface side convex portions 235 and 335 on the first surface Sa1 and Sb1. The first surface side concave portions 225 and 325 and the first surface side convex portions 235 and 335 are alternately arranged in each direction of inclining to one side and inclining to the other side with respect to the Z-axis direction. ing. The plurality of first surface side concave portions 225 and 325 are included in the plurality of concave portions 22 and 32 of the above-mentioned heat transfer portions 20 and 30, and the plurality of first surface side convex portions 235 and 335 are the above-mentioned heat transfer portions. It is included in the plurality of convex portions 23 and 33 of 20 and 30.

Further, each of the weir portions 26 and 36 has a plurality of second surface side concave portions 226 and 326 and a plurality of second surface side convex portions 236 and 336 on the second surface Sa2 and Sb2. The plurality of second surface side recesses 226 and 326 and the plurality of second surface side convex portions 236 and 336, respectively, are the first surface side recesses 225, 325 or the first at corresponding positions on the first surfaces Sa1 and Sb1. It is formed on the back side of the surface side convex portions 235 and 335. Specifically, the second surface side concave portion 226, 326 and the second surface side convex portion 236, 336 alternate in each direction of the direction of inclining to one side and the direction of inclining to the other side with respect to the Z-axis direction. Is located in. The plurality of second surface side concave portions 226 and 326 are included in the plurality of concave portions 22 and 32 of the above-mentioned heat transfer portions 20 and 30, and the plurality of second surface side convex portions 236 and 336 are the above-mentioned heat transfer portions. It is included in the plurality of convex portions 23 and 33 of 20 and 30.

Both the first heat transfer plate 2 and the second heat transfer plate 3 have heat transfer portions 20 and 30 configured as described above.

Subsequently, different configurations of the first heat transfer plate 2 and the second heat transfer plate 3 will be described.

The fitting portion 21 of the first heat transfer plate 2 extends from the outer peripheral edge of the heat transfer portion 20 toward the first surface Sa1 (see FIGS. 2 and 3). On the other hand, the fitting portion 31 of the second heat transfer plate 3 extends from the outer peripheral edge of the heat transfer portion 30 toward the second surface Sb2 (see FIGS. 2 and 6).

As shown in FIG. 2, the first heat transfer plate 2 and the second heat transfer plate 3 configured as described above have their first surfaces Sa1 and Sb1 facing each other, or their second surfaces. Sa2 and Sb2 are alternately overlapped in the X-axis direction so as to face each other. That is, each of the plurality of heat transfer plates 2 and 3 has the first surfaces Sa1 and Sb1 of the heat transfer portions 20 and 30 adjacent to each other on one side in the X-axis direction. The heat transfer portions 20 and 30 of the heat transfer plates 2 and 3 adjacent to each other on the other side in the X-axis direction while facing the first surfaces Sa1 and Sb1 of 30 and the second surfaces Sa2 and Sb2 of the heat transfer portions 20 and 30. The second surface Sa2 and Sb2 of the above surface are opposed to each other.

At this time, in the plurality of heat transfer plates 2 and 3 stacked, the fitting portions 21 and 31 of one of the heat transfer plates 2 and 3 adjacent to each other in the X-axis direction are the X-axis. It is fitted with the fitting portions 21, 31 of the other heat transfer plates 2, 3 of the heat transfer plates 2, 3 adjacent to each other in the direction.

Specifically, in a plurality of heat transfer plates 2 and 3 arranged in the X-axis direction, two heat transfer plates (first heat transfer plate 2 and second heat transfer plate 2) adjacent to each other so that the first surfaces Sa1 and Sb1 face each other. The heat transfer plate pairs 5 are formed by superimposing the plates 3), and a plurality of the heat transfer plate pairs 5 are formed (see FIG. 2). These plurality of heat transfer plate pairs 5 are superposed so that the second surfaces Sa2 and Sb2 face each other. In this superposition, the plurality of heat transfer plate pairs 5 are superposed in a state of being rotated by 180 ° around a virtual line extending in the X-axis direction every other one.

In each of these heat transfer plate pairs 5, the corresponding first surface side division regions D1 (specifically, at the same position in the Z-axis direction) of the opposite first surfaces Sa1 and Sb1 face each other. Then, in the facing first surface side divided regions D1 (first surfaces Sa1, Sb1), the first flow path forming recesses 221 and 321 and the first flow path forming protrusions 231 and 331 are formed in the Y-axis direction. By arranging them alternately, as shown in FIG. 13, a plurality of ridge pairs 6 formed by facing first flow path forming ridges 231 and 331 are lined up in the Y-axis direction.

In the plurality of ridge pairs 6 arranged in the Y-axis direction, in at least one ridge pair (first ridge pair) 6A, the first ridges 231A and 331A facing each other face each other with an interval in the X-axis direction. However, in the remaining ridge pairs (second ridge pairs) 6B, the second ridges 231B and 331B facing each other are in contact with each other. In the heat transfer plate pair 5 of the present embodiment, the first ridge pair 6A and the second ridge pair 6B are alternately arranged in the Y-axis direction.

Further, in each heat transfer plate pair 5, the plurality of barrier backside recesses 223 and 323 of the facing first surfaces Sa1 and Sb1 face each other. As a result, as shown in FIG. 14, the heat transfer portions 20 and 30 extend from one end to the other end along the Y-axis direction at positions corresponding to the barrier backside recesses 223 and 323 between the first surfaces Sa1 and Sb1. A columnar space S1 is formed.

Further, in the adjacent heat transfer plate pairs 5, as described above, one heat transfer plate pair 5 is adjacent to the other heat transfer plate pair 5 in a state of being rotated 180 ° around a virtual line extending in the X-axis direction. Matching. Then, in the second surfaces Sa2 and Sb2, the dimension of the second surface side division region D2 at one end in the Z axis direction in the Z axis direction is half of the dimension of the other second surface side division region D2 in the Z axis direction or It's about half. Therefore, the second surface side division regions D2 of the opposite second surfaces Sa2 and Sb2 face each other in a state of being displaced in the Z-axis direction.

In the adjacent heat transfer plate pairs 5 of the present embodiment, the second surface Sa2 of one heat transfer plate pair 5, the second surface side divided region D2 of Sb2, and the second surface Sa2 of the other heat transfer plate pair 5. The second surface side division region D2 of Sb2 is opposed to the second surface side division region D2 in a state of being deviated by a half pitch in the Z-axis direction (distance corresponding to the distance between the barrier protrusions 233 and 333, which are smaller in the Z-axis direction than the others). There is. That is, the ridges 233, 333 for each barrier of the second surface Sa2, Sb2 of the two opposing surfaces Sa2, Sb2, and the ridges 233, 333 for each barrier of the other second surfaces Sa2, Sb2. Are arranged at different positions in the Z-axis direction. In the example of the present embodiment, the ridges 233, 333 for each barrier of one second surface Sa2 and Sb2 and the ridges 233 and 333 for each barrier of the other second surface Sa2 and Sb2 are in the Z-axis direction. They are arranged at positions that are offset by half a pitch.

At this time, the barrier ridges 233 and 333 on one of the second surfaces Sa2 and Sb2 are arranged on the other second surface Sa2 and Sb2 at intervals in the Y-axis direction. A plurality of ridges 233, 333 for barriers of the other second surfaces Sa2 and Sb2 are arranged at intervals in the Y-axis direction on one of the second surfaces Sa2 and Sb2 while abutting on each of the 232 and 332. It comes into contact with each of the two flow path forming ridges 232 and 332. As a result, as shown in FIG. 13, in the second flow path Rb formed between the second surfaces Sa2 and Sb2, the heat transfer portions 20 and 30 in the Y-axis direction are straightened in the Z-axis direction from one end to the other end. There is no area where it can flow. That is, while the second fluid B flows from one end to the other end of the heat transfer portions 20 and 30 in the Z-axis direction, the barrier of the second surfaces Sa2 and Sb2 of any of the two opposing surfaces Sa2 and Sb2. It collides with the ridges 233 and 333.

Further, at a position where the barrier ridges 233 and 333 do not exist in the Z-axis direction of the opposite second surfaces Sa2 and Sb2, a plurality of second flow path forming ridges 232 and 332 on one of the second surfaces Sa2 and Sb2 are formed. And each of the plurality of second flow path forming ridges 232 and 332 of the other second surfaces Sa2 and Sb2 are arranged at positions shifted in the Y-axis direction so as not to come into contact with each other.

In the heat transfer portions 20 and 30 of the present embodiment, the center of the recesses 222 and 222 for forming the second flow path in the Y-axis direction and the second flow path adjacent to the recesses 222 and 222 for forming the second flow path are adjacent to each other. When the distance from the center of the forming ridges 232 and 332 in the Y-axis direction is one pitch, the second flow path forming recesses 222 and 322 and the second flow path are formed in each second surface side division region D2. The arrangement with the ridges 232 and 332 is shifted by 1/2 pitch with respect to the line-symmetrical arrangement with the vertical center line CL as the axis of symmetry (see FIGS. 4 and 6). Therefore, the ridges 232 and 332 for forming the second flow path on one of the second surfaces Sa2 and Sb2 and the dents 222 and 322 for forming the second flow path on the other surfaces Sa2 and Sb2 face each other and one side. The second flow path forming recess 222, 322 of the second surface Sa2, Sb2 and the second flow path forming convex line 232, 332 of the other second surface Sa2, Sb2 face each other. The recesses 222 and 322 for forming the second flow path and the ridges 232 and 332 for forming the second flow path are arranged on each of the two surfaces. That is, on the opposite second surfaces Sa2 and Sb2, the arrangement of the second flow path forming recesses 222 and 322 and the second flow path forming protrusions 232 and 332 in each of the second surface side division regions D2 is one pitch, respectively. They are facing each other in a misaligned state.

As described above, a plurality of heat transfer plates 2 and 3 are superposed to form a heat transfer plate group, so that the first fluid A can flow between the first surfaces Sa1 and Sb1 in the Z-axis direction. Along with the formation of the one flow path Ra, the second flow path Rb through which the second fluid B can flow in the Z-axis direction is formed between the second surfaces Sa2 and Sb2, respectively.

Further, in this heat transfer plate group, openings 200, 201, 202, 203, 300, 301, 302, and 303 at corresponding positions of the heat transfer portions 20 and 30 are connected in the X-axis direction. Further, the opening peripheral portions 200p, 201p, 202p, 203p, 300p, 301p, 302p, and 303p that face each other and bulge toward the other party come into contact with each other. As a result, the first inflow path Pa1 that supplies the first fluid A to the first flow path Ra, the first outflow path Pa2 that causes the first fluid A to flow out from the first flow path Ra, and the second fluid B to the second flow path Rb. A second inflow path Pb1 for supplying the fluid and a second outflow path Pb2 for discharging the second fluid B from the second flow path Rb are formed (see FIGS. 2 and 15).

Each of the pair of frame plates 4 is thicker than the heat transfer plates 2 and 3 to ensure the strength of the heat exchanger 1.

Specifically, as shown in FIGS. 1 and 2, one of the frame plates 4A of the pair of frame plates 4 has a thick plate-shaped plate body 41A extending in a direction orthogonal to the X-axis direction and a plate body 41A. A frame fitting portion 42A extending from the entire outer peripheral edge of the plate body 41A in a direction intersecting with the plate body 41A, and a plurality of nozzles 43 extending from the plate body 41A are provided.

The plate body 41A has a shape corresponding to the heat transfer portions 20 and 30 of the heat transfer plates 2 and 3, and the plate body 41A of the present embodiment has a long rectangular shape in the Z-axis direction.

The plate body 41A has a through hole penetrating in the Z-axis direction at a position overlapping each of the first inflow path Pa1, the first outflow path Pa2, the second inflow path Pb1, and the second outflow path Pb2 when viewed from the X-axis direction. Have. That is, the plate body 41A of the present embodiment has through holes at the four corners.

The frame fitting portion 42A extends from the outer peripheral edge of the plate body 41A to the heat transfer plates 2 and 3 sides.

Each of the plurality of nozzles 43 is a tubular portion, and extends in the X-axis direction from a position corresponding to each through hole of the plate body 41A. The hollow portion of each nozzle 43 communicates with the through hole of the plate body 41A. As a result, the hollow portion of each nozzle 43 communicates with the first inflow path Pa1, the first outflow path Pa2, the second inflow path Pb1, or the second outflow path Pb2.

The other frame plate 4B of the pair of frame plates 4 intersects the plate main body 41B extending in the direction orthogonal to the X-axis direction and the plate main body 41B from the entire outer peripheral edge of the plate main body 41B. A frame fitting portion 42B extending in the direction is provided.

The plate body 41B has a shape corresponding to the heat transfer portions 20 and 30 of the heat transfer plates 2 and 3, and the plate body 41B of the present embodiment has a long rectangular shape in the Z-axis direction.

The frame fitting portion 42B extends from the outer peripheral edge of the plate body 41B to the side opposite to the heat transfer plates 2 and 3, that is, to the side away from the heat transfer plates 2 and 3.

The pair of frame plates 4A and 4B configured as described above sandwich the heat transfer plate group from the outside in the X-axis direction.

At this time, the frame fitting portion 42A of one frame plate 4A is externally fitted to the fitting portion 21 of the heat transfer plate 2 adjacent in the X-axis direction. On the other hand, the frame fitting portion 42B of the other frame plate 4B is externally fitted to the fitting portion 31 of the heat transfer plate 3 adjacent in the X-axis direction.

In the heat exchanger 1 of the present embodiment, the abutting portions of the adjacent frame plates 4 and the heat transfer plates 2 and 3 and the abutting portions of the adjacent heat transfer plates 2 and 3 are brazed. Has been done. As a result, the plurality of heat transfer plates 2, 3 and the pair of frame plates 4 are integrally (mechanically) connected, and the facing surfaces (contact portions) of the adjacent heat transfer plates 2, 3 are sealed. Will be done.

In the heat exchanger 1 configured as described above, the first fluid A supplied from the outside to the first inflow path Pa1 is a plurality of first streams from the first inflow path Pa1 as shown in FIGS. 2 and 15. It flows into each of the roads Ra. Then, the first fluid A flows in the Z-axis direction between the openings 202, 203, 302, and 303 arranged at diagonal positions of the heat transfer portions 20 and 30 in each of the plurality of first flow paths Ra, and flows through the first outflow path. It flows out to Pa2 (see FIG. 16). On the other hand, the second fluid B supplied from the outside to the second inflow path Pb1 flows into each of the plurality of second flow paths Rb and Rb1 from the second inflow path Pb1. Then, the second fluid B flows in the Z-axis direction between the openings 200, 201, 300, and 301 arranged at diagonal positions of the heat transfer portions 20 and 30 in each of the plurality of second flow paths Rb and Rb1. It flows out to the second outflow path Pb2 (see FIG. 17).

At this time, the first fluid A flowing through the first flow path Ra and the second fluid B flowing through the second flow paths Rb and Rb1 are heat transfer plates that separate the first flow path Ra from the second flow paths Rb and Rb1. Heat is exchanged via a few (heat transfer units 20, 30). As a result, the first fluid A condenses or evaporates in the process of flowing in the first flow path Ra in the Z-axis direction.

In the heat exchanger 1 of the present embodiment, a fluid whose phase changes due to heat exchange such as chlorofluorocarbon is used as the first fluid A, and water or the like is used as the second fluid, but the present invention is not limited thereto.

As in the above heat exchanger 1, in the first ridge pair 6A, the first ridges 231A and 331A (the ridges 231 and 331 for forming the first flow path) face each other with a gap in the X-axis direction. In the X-axis direction of the heat transfer plates 2, 3 (first surfaces Sa1, Sb1) defining the first flow path Ra, as compared with the case where the first flow path forming ridges 231 and 331 facing each other at the position are in contact with each other. The interval increases (see FIG. 13). Therefore, the flow path cross-sectional area of the first flow path Ra becomes large.

On the other hand, in the first ridge pair 6A, the first ridges 231A and 331A face each other with a gap in the X-axis direction, so that the first ridges 231A and 331A facing each other at the position are in contact with each other. , The heat transfer plates 2, 3 (second) that define the second flow path Rb at the position corresponding to the first ridge pair 6A in the Y-axis direction of the second flow path Rb adjacent to the first flow path Ra. The distance between the surfaces Sa2 and Sb2) in the X-axis direction becomes smaller (see FIG. 13). Therefore, the flow path cross-sectional area of the second flow path Rb becomes small.

As a result, in the heat exchanger 1, the flow path cross-sectional area of the first flow path Ra and the second flow path Rb is larger than that in the case where the first ridges 231A and 331A facing each other in the first ridge pair 6A are in contact with each other. The difference becomes large. Therefore, it becomes easy to increase the difference between the flow velocity of the first fluid A flowing through the first flow path Ra and the flow velocity of the second fluid B flowing through the second flow path Rb, and as a result, for example, between freon and water as described above. Sufficient heat exchange performance can be obtained even when the first fluid A and the second fluid B having different characteristics are exchanged for heat.

Further, in the heat exchanger 1 of the present embodiment, at positions where the barrier ridges 233 and 333 are not arranged in the Z-axis direction of the opposite second surfaces Sa2 and Sb2, there are a plurality of one of the second surfaces Sa2 and Sb2. The Y-axis so that each of the second flow path forming ridges 232 and 332 of the above and each of the plurality of second flow path forming ridges 232 and 332 of the other second surfaces Sa2 and Sb2 do not come into contact with each other. It is located at a position shifted in the direction.

Therefore, when the second fluid B flows in the Z-axis direction through the second flow path Rb formed between the opposite second surfaces Sa2 and Sb2, the second fluid B can also move in the Y-axis direction. That is, when the ridges 232 and 332 for forming the second flow path of the opposite second surfaces Sa2 and Sb2 are in contact (contact) with each other, the contact portion between the ridges 232 and 332 for forming the second flow path is contacted. Second when the second fluid B flows in the second flow path Rb in the Z-axis direction (flows along the second flow path forming recess 222, 322 and the second flow path forming convex line 232, 332). The movement of the fluid B in the Y-axis direction is restricted. As a result, the bias in the Y-axis direction in the flow (flow rate) of the second fluid B is suppressed, and as a result, the deterioration of the heat exchange performance due to the bias can be prevented.

Further, in the heat exchanger 1 of the present embodiment, the ridges 232 and 322 for forming the second flow path of one of the two opposing surfaces Sa2 and Sb2, the second surface Sa2 and Sb2, are the other second surface Sa2. , Sb2's second flow path forming recess 222,322 faces each other, and one second surface Sa2, Sb2's second flow path forming recess 222,322 is the other second surface Sa2, Sb2. It faces the ridges 232 and 332 for forming two flow paths. According to such a configuration, the second flow path Rb extends in the Y direction so as to meander when viewed from the Z-axis direction (see FIG. 13), whereby, at each position in the Y-axis direction, the second surface Sa2, which faces each other, The distance between Sb2s (distance in the X-axis direction) is constant or substantially constant. Therefore, the bias in the Y-axis direction in the flow of the second fluid B is further suppressed (in other words, the concentration in a part of the Y-axis direction is suppressed), and as a result, heat exchange due to the bias is suppressed. It is possible to prevent the deterioration of performance more reliably.

Further, in the heat exchanger 1 of the present embodiment, the second surfaces Sa2 and Sb2 have a plurality of barrier ridges 233 and 333 extending in a direction intersecting the Z-axis direction, and each barrier ridge 233,333. Is in contact with each of the plurality of second flow path forming ridges 232 and 332 on the second surface Sa2 and Sb2 on the other side. According to this configuration, when the second fluid B flows through the second flow path Rb, specifically, along the second flow path forming recesses 222 and 322, it collides with the barrier ridges 233 and 333. As a result, turbulence (turbulence, etc.) occurs in the flow of the second fluid B, which improves the heat exchange performance (heat exchange efficiency).

In the heat exchanger 1, when the barrier protrusions 233 and 333 of the opposite second surfaces Sa2 and Sb2 are arranged at the same position in the Z-axis direction, the flow path width of the second flow path Rb at this position ( The dimension in the X-axis direction) becomes small or disappears, and the flow resistance of the second flow path Rb becomes too large. However, like the heat exchanger 1 of the present embodiment, each of the plurality of barrier ridges 233,333 of one of the two opposing surfaces Sa2 and Sb2, the second surface Sa2 and Sb2, and the other second surface Sa2 and Sb2. When the plurality of barrier protrusions 233 and 333 of the two surfaces Sa2 and Sb2 are arranged at different positions in the Z-axis direction (see FIG. 14), the flow path width at each position in the Z-axis direction is increased. While securing and preventing the flow resistance of the second flow path Rb from becoming too large, the ridges 233 for each barrier provided on one of the second surfaces Sa2 and Sb2 and the other second surface Sa2 and Sb2, respectively. When the second fluid B collides with 333, the flow of the second fluid B in the second flow path Rb can be sufficiently turbulent.

Further, in the heat exchanger 1 of the present embodiment, on the opposite second surfaces Sa2 and Sb2, the tops of the barrier ridges 233 and 333 and the tops of the second flow path forming ridges 232 and 332 are 232t. The position of 332t in the X-axis direction is the same. According to this configuration, a region communicating in the Z-axis direction in the second flow path Rb, that is, a region that allows the second fluid B to pass through without colliding with the heat transfer plates 2 and 3 when flowing in the Z-axis direction. It does not occur (see FIG. 13). That is, the second fluid B is used in the recesses 222 and 222 for forming the second flow path of one of the second surfaces Sa2 and Sb2 (in other words, for forming the second flow path adjacent to the second surface Sa2 and Sb2 of one side). Even when the fluid flows between the ridges 232 and 332), it is inside the recesses 222 and 322 for forming the second flow path of the other second surfaces Sa2 and Sb2 (in other words, the other second surfaces Sa2 and Sb2 are adjacent to each other. Even when the fluid flows between the two flow path forming ridges 232 and 332), it collides with the barrier ridges 233 and 333. As a result, it is possible to prevent the occurrence of a bias in the flow of the second fluid B (specifically, a bias due to the flow being concentrated in the region where the second fluid B can pass without collision), and as a result, it is caused by the bias in the flow. It is possible to prevent deterioration of heat exchange performance.

The plate heat exchanger of the present invention is not limited to the above embodiment, and it goes without saying that various modifications can be made without departing from the gist of the present invention. For example, the configuration of one embodiment can be added to the configuration of another embodiment, and a part of the configuration of one embodiment can be replaced with the configuration of another embodiment. In addition, some of the configurations of certain embodiments can be deleted.

In the heat exchanger 1 of the above embodiment, a plurality of barrier ridges 233 and 333 are arranged on the opposite second surfaces Sa2 and Sb2, but the configuration is not limited to this. The barrier ridges 233 and 333 may be arranged only on one of the opposite second surfaces Sa2 and Sb2. Further, the barrier ridges 233 and 333 may not be provided on the second surfaces Sa2 and Sb2, and only one may be arranged.

Further, the barrier ridges 233 and 333 of the above embodiment extend straight from one end to the other end of the heat transfer portions 20 and 30 in the Y-axis direction, but are not limited to this configuration. The barrier ridges 233 and 333 may extend in a direction intersecting the Z-axis direction. Further, the barrier ridges 233 and 333 may be arranged in a partial range (region) in the Y-axis direction of the heat transfer portions 20 and 30. Further, the barrier ridges 233 and 333 may be bent or curved at one or a plurality of places. Further, the ridges 233 and 333 for the barrier may be extended intermittently.

Further, the tops of the barrier ridges 233 and 333 of the above embodiment are at the same positions as the tops of the second flow path forming ridges 232 and 322 in the X-axis direction, that is, the barrier ridges 233, 333 and the second. The heights of the flow path forming ridges 232 and 322 are the same, but the height is not limited to this configuration. The tops of the barrier ridges 233 and 333 may be higher or lower than the second flow path forming ridge 232.

Further, the recesses for forming each flow path (the recesses 221 and 321 for forming the first flow path, the recesses 222 and 222 for forming the second flow path) and the protrusions for forming each flow path in the heat exchanger 1 of the above embodiment. (Convex 231 and 331 for forming the first flow path, ridges 232 and 332 for forming the second flow path) are arranged from one end to the other end in the Y-axis direction of the divided regions D1 and D2, and each of them is arranged in the Z-axis direction. It extends straight to, but is not limited to this configuration. The recesses 221 and 222, 321 and 322 for forming the flow path and the protrusions 231, 232, 332, 332 and 332 for forming the flow path may be inclined with respect to the Z-axis direction, and may be inclined at one place or a plurality of places. It may be bent or curved. That is, the recesses 221, 222, 321 and 322 for forming each flow path and the ridges 231, 232, 332, 332 for forming each flow path may extend along the Z-axis direction. Further, the recesses 221, 222, 321 and 322 for forming each flow path and the ridges 231, 232, 332, 332 for forming each flow path are formed in the divided regions D1, D2 or the heat transfer portions 20 and 30 in the Z-axis direction. It may be arranged in a part of a range (area). Further, the recesses 221, 222, 321 and 322 for forming each flow path and the ridges 231, 232, 332, 332 for forming each flow path may be extended intermittently.

Further, in the heat exchanger 1 of the above embodiment, the positions of the tops of the first ridges 231A and 331A are the positions of the tops of the second ridges 231B and 331B and the recesses for forming the second flow path in the X-axis direction. It is a central position with respect to the position of the bottom of 222, 222, but is not limited to this configuration. In the X-axis direction, the position of the top of the first ridges 231A and 331A is the position on the bottom side of the second flow path forming recesses 222 and 322 from the position of the top of the second ridges 231B and 331B. Any position may be used as long as it is located on the top side of the second ridges 231B and 331B from the position of the bottom of the second flow path forming recesses 222 and 322.

Further, in the heat exchanger 1 of the above embodiment, in the ridge group composed of a plurality of ridges 231 and 331 for forming the first flow path arranged at intervals in the Y-axis direction, the first ridges 231A and 331A are used. The second ridges 231B and 331B are arranged alternately, in other words, the first ridges 231A and 331A are arranged one by one between the second ridges 231B and 331B adjacent to each other in the Y-axis direction. However, it is not limited to this configuration. A plurality of the first ridges 231A and 331A may be arranged between the second ridges 231B and 331B adjacent to each other in the Y-axis direction. For example, when P ≧ 0.9, the number of the first ridges 231A and 331A arranged between the second ridges 231B and 331B adjacent to each other in the Y-axis direction is preferably two or less from the viewpoint of strength. ..

Further, the number of the first ridges 231A and 331A arranged between the second ridges 231B and 331B adjacent to each other in the Y-axis direction may be different for each part (region) of the heat transfer portions 20 and 30. ..

Further, the first ridges 231A and 331A have at least one groove portions 2310 and 3310 that cross the first ridges 231A and 331A in the Y-axis direction at an intermediate position in the Z-axis direction (examples shown in FIGS. 18 and 19). Then you may have one).

At the portion of the heat transfer plate pair 5 that constitutes the first ridge pair 6A, the first ridges 231A and 331A facing each other are not in contact with each other (they are facing each other at intervals). The strength against the force in the direction in which the one ridges 231A and 331A approach each other is lower than that in the configuration in which the first ridges 231A and 331A are in contact with each other. However, as in the above configuration, by providing rib-shaped portions (grooves 2310 and 3310) in the first ridges 231A and 331A constituting the first ridge pair 6A, the strength of the portion can be improved. ..

Further, not all the first protrusions 231A and 331A need to have the grooves 2310 and 3310. For example, a portion where the strength tends to be low in the heat transfer portions 20 and 30 such as the peripheral portion of the main heat transfer portions 25 and 35 and the boundary portion with other portions such as the weir portions 26 and 36 in the main heat transfer portions 25 and 35. Only the first ridges 231A and 331A of the above may have grooves 2310 and 3310.

Further, in the heat exchanger 1 of the above embodiment, in the facing second surfaces Sa2 and Sb2 of the adjacent heat transfer plate pairs 5, a plurality of second flow path forming ridges 232 of one of the second surfaces Sa2 and Sb2, Each of the 332 and each of the plurality of second flow path forming protrusions 232 and 332 of the other second surfaces Sa2 and Sb2 are arranged at positions deviated from each other in the Y-axis direction so as not to come into contact with each other. However, it is not limited to this configuration. The ridges 232 and 332 for forming the second flow path of the opposite second surfaces Sa2 and Sb2 may be in contact with each other.

The specific flow path configuration in the heat exchanger 1 is not limited. For example, in the heat exchanger 1 of the above embodiment, the flow paths Ra and Rb are connected in parallel between the inflow paths Pa1 and Pb1 and the outflow paths Pa2 and Pb2, but the flow of the heat exchanger 1 In the path (that is, the flow path of the fluids A and B from flowing into the heat exchanger 1 to flowing out to the outside), a portion connected in series or a portion connected in parallel is provided. You may.

The heat exchanger 1 of the above embodiment includes only the first heat transfer plate 2 and the second heat transfer plate 3 as heat transfer plates, but is not limited to this configuration. In the heat exchanger 1, at least one end of the heat transfer plate group in which the first heat transfer plate 2 and the second heat transfer plate 3 are overlapped with each other in the Z-axis direction is the heat transfer plate of the above-described embodiment. A group of heat transfer plates on which heat transfer plates having different configurations from those of 2 and 3 are overlapped may be overlapped.

1 ... Plate type heat exchanger, 2 ... First heat transfer plate (heat transfer plate), 3 ... Second heat transfer plate (heat transfer plate), 20, 30 ... Heat transfer section, 200, 201, 202, 203, 300, 301, 302, 303 ... Opening, 200p, 201p, 202p, 203p, 300p, 301p, 302p, 303p ... Opening peripheral edge, 21, 31 ... Fitting, 22, 32 ... Recessed, 221, 321 ... First stream Road forming concave (first surface side concave) 222, 322 ... Second flow path forming concave (second surface side concave) 222A, 222A ... First concave (second flow path forming) Concave, second surface side concave) 222B, 322B ... Second concave (second flow path forming concave, second surface side concave), 223, 223A, 323, 323A ... Barrier back side concave, 225, 325 ... First surface side concave 226, 326 ... Second surface side concave, 23, 33 ... Convex part, 231, 331 ... First flow path forming convex (first surface side convex) 231A, 331A … First ridge (first flow path forming ridge, first surface side ridge) 231B, 331B… Second ridge (first flow path forming ridge, first surface side ridge) 2310, 3310 ... Grooves, 232, 332 ... Convex for forming the second flow path (convex on the second surface side), 233, 233A, 333, 333A ... Convex for barriers, 235, 335 ... Convex on the first surface side, 236, 336 ... Second surface side convex portion, 25, 35 ... Main heat transfer portion, 26, 36 ... Dam portion, 4, 4A, 4B ... Frame plate, 41A, 41B ... Plate body, 42A, 42B ... Frame fitting portion, 43 ... Nozzle, 5 ... Heat transfer plate pair, 6 ... Convex pair, 6A ... First convex strip pair, 6B ... Second convex strip pair, 500 ... Plate type heat exchanger, 501 ... Heat transfer plate, A ... No. One fluid (fluid), B ... second fluid (fluid), CL ... vertical center line, D1 ... first surface side division area, D2 ... second surface side division area, Pa1 ... first inflow path, Pa2 ... first flow Outgoing path, Pb1 ... Second inflow path, Pb2 ... Second outflow path, Ra ... First flow path (flow path), Rb ... Second flow path (flow path), S1 ... Columnar space, Sa1, Sb1 ... First surface , Sa2, Sb2 ... Second side

Claims (7)

Two transmissions that have a first surface and a second surface opposite to the first surface, and are superposed so that the first surfaces face each other in the first direction orthogonal to the first surface. Equipped with multiple heat transfer plate pairs composed of heat plates
In a state where the plurality of heat transfer plate pairs are superposed so that the second surfaces face each other in the first direction, the first fluid is orthogonal to the first direction between the first surfaces facing each other. A first flow path that can flow in two directions is formed, and a second flow path that allows the second fluid to flow in the second direction is formed between the two opposing surfaces.
In each of the plurality of heat transfer plates included in the plurality of heat transfer plate pairs,
The first surface has at least one first surface side ridge extending along the second direction and at least one first surface side recess extending along the second direction.
The second surface has at least one second surface side recess having a front and back relationship with the first surface side convex groove on the first surface, and a front and back relationship between the first surface side recess on the first surface. Has at least one second side ridge in
In each heat transfer plate pair, the third direction in which the first surface side convex and the first surface side concave are orthogonal to each of the first direction and the second direction on each of the facing first surfaces. By alternately arranging the ridges in the third direction, a plurality of ridge pairs composed of the ridges on the first surface side facing each other are lined up in the third direction.
In the first ridge pair, which is at least one of the plurality of ridge pairs arranged in the third direction, the facing first surface side ridges face each other with a gap in the first direction. However, in the second ridge pair, which is the remaining ridge pair among the plurality of ridge pairs, the plate type heat exchanger in which the facing first surface side ridges are in contact with each other. The claim that the first surface side ridges constituting the first ridge pair have at least one groove portion that crosses the first surface side ridges in the third direction at an intermediate position in the second direction. The plate heat exchanger according to 1. Each of the plurality of second surface side ridges on one of the two opposing second surfaces and the plurality of second surface side ridges on the other second surface of the opposite second surfaces. The plate heat exchanger according to claim 1 or 2, wherein each of the above is arranged at a position deviated from each other in the third direction so as not to come into contact with each other. The second surface side convex of the one second surface faces the second surface side concave of the other second surface, and the second surface side concave of the one second surface faces the other. The plate heat exchanger according to claim 3, which faces the second surface side ridge on the second surface of the above. At least one second surface of the opposing second surfaces has at least one barrier ridge extending in a direction intersecting the second direction.
The plate heat exchanger according to any one of claims 1 to 4, wherein the barrier ridge is in contact with the plurality of second side ridges on the other side. The at least one barrier ridge is arranged on each of the opposing second surfaces.
The at least one barrier ridge on the one second surface of the opposing second surface and the at least one barrier ridge on the other second surface of the facing second surface. Is the plate heat exchanger according to claim 5, which is arranged at different positions in the second direction. The plate according to claim 5 or 6, wherein in each of the facing second surfaces, the positions of the top of the barrier ridge and the top of each second side ridge are the same in the first direction. Type heat exchanger.

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