JP7018299B2 - Plate heat exchanger - Google Patents

Description

Application of Article 30, Paragraph 2 of the Patent Law 1. Exhibition date (exhibition start date) June 22, 2017 Exhibition location Hisaka Works Co., Ltd. Koike Plant

In the present invention, a plurality of superposed heat transfer plates are provided, and a first flow path through which the first fluid flows and a second flow path through which the second fluid flows are alternately formed with the heat transfer plates as boundaries. Regarding plate-type heat exchangers.

Conventionally, a plate type heat exchanger is known as one of the heat exchangers that exchange heat between the first fluid and the second fluid.

Such a plate-type heat exchanger is provided with a plurality of heat transfer plates stacked in the first direction, and has a first flow path through which the first fluid flows and a second flow path through which the second fluid flows, with the heat transfer plates as boundaries. The flow paths are formed alternately (see, for example, Patent Document 1).

On the premise of this, as shown in FIGS. 12 and 13, the heat transfer plate 100 has a first surface Sa including the first flow path defining region 101 defining the first flow path Ra and a side opposite to the first surface Sa. The second surface Sb has a second surface Sb including a second flow path defining region 102 that defines the second flow path Rb. Further, the heat transfer plates 100 are a pair of first through holes 103 each penetrating in the first direction in the first flow path demarcation region 101, and are arranged at intervals in the second direction orthogonal to the first direction. A pair of first through holes 103 and a pair of second through holes 104, each of which penetrated in the first direction in the second flow path demarcation region 102, were arranged at intervals in the second direction. It has a pair of second through holes 104.

The first through hole 103 of the pair of first through holes 103 is orthogonal to the first and second directions with respect to the second through hole 104 of one of the pair of second through holes 104. They are arranged at intervals in three directions. On the other hand, the other first through hole 103 of the pair of first through holes 103 is spaced apart from the other second through hole 104 of the pair of second through holes 104 in the third direction. Are arranged.

Along with this, the first flow path demarcation area 101 and the second flow path demarcation area 102 are heat transfer areas 105 and 106 for heat exchange between the first fluid and the second fluid, and heat transfer areas overlapping each other in the first direction. Includes regions 105, 106. In each of the first flow path demarcation area 101 and the second flow path demarcation area 102, the heat transfer areas 105 and 106 are the vertical center line CL1 extending in the second direction and the horizontal center line CL2 extending in the third direction of the heat transfer plate 100. The main heat transfer regions 105a, 106a including the intersection with the main heat transfer regions 105a, 106a and the pair of sub heat transfer regions 105b, 106b sandwiching the main heat transfer regions 105a, 106a in the second direction, as the distance from the main heat transfer regions 105a, 106a increases. Includes a pair of sub-heat transfer regions 105b, 106b with smaller dimensions in the third direction.

Then, in order to increase the heat exchange efficiency between the first fluid and the second fluid, the heat transfer regions 105 and 106 (main heat transfer regions 105a and 106a and each of the first surface Sa and the second surface Sb of the heat transfer plate 100) The sub-heat transfer regions 105b and 106b) are made uneven.

Specifically, in the first surface Sa and the second surface Sb of the heat transfer plate 100, the concave portions 107a, 108a and the convex portions 107b, 108b, respectively, extending in a predetermined direction in the main heat transfer regions 105a, 106a, respectively. Are formed alternately in a direction orthogonal to the direction in which they extend. Further, in the pair of sub-heat transfer regions 105b and 106b, concave grooves 107a, 108a and convex grooves 107b, 108b, each extending in a predetermined direction, are alternately formed in a direction orthogonal to the extending direction thereof.

In such a plate heat exchanger, each of the plurality of heat transfer plates 100 faces the first surface Sa of the adjacent heat transfer plates 100 on one side in the first direction, and the second surface Sb. Is arranged so as to face the second surface Sb of the adjacent heat transfer plates 100 on the other side of the first direction. In this state, as shown in FIGS. 14 and 15, the ridges 107b and 108b in the main heat transfer regions 105a and 106a of the adjacent heat transfer plates 100 intersect with each other and the adjacent heat transfer plates 100 The ridges 107b and 108b in the secondary heat transfer regions 105b and 106b intersect each other.

Then, the heat transfer plates 100 (adjacent heat transfer plates 100) with the first surfaces Sa facing each other are sealed along the contour of the first flow path defining region 101, and the second surfaces Sb face each other. The space between the heat transfer plates 100 (adjacent heat transfer plates 100) that have been made is sealed along the contour of the second flow path defining region 102.

As a result, in the plate heat exchanger, the first flow path Ra is formed between the first flow path demarcation regions 101 of the adjacent heat transfer plates 100, and the second flow path demarcation area 102 of the adjacent heat transfer plates 100 is formed. A second flow path Rb is formed in. Further, the first through holes 103 in the first flow path defining region 101 are connected in the first direction to form a pair of first series passages Ra1 and Ra2 communicating only with the first flow path Ra, and the second flow. The second through holes 104 in the road demarcation region 102 are connected in the first direction to form a pair of second passages Rb1 and Rb2 communicating only with the second flow path Rb.

In such a plate heat exchanger, the first fluid A is supplied to one of the first series passages Ra1, so that the first fluid A flows into the first flow path Ra from one of the first series passages Ra1. In one flow path Ra, it circulates toward the other series of passage Ra2. On the other hand, when the second fluid B is supplied to one of the second passages Rb1, the second fluid B flows into the second passage Rb from one of the second passages Rb1 and flows into the second passage Rb. In Rb, it circulates toward the other second passage Rb2.

At this time, the first fluid A and the second fluid B exchange heat via the heat transfer regions 105 and 106 of the heat transfer plate 100. In this type of plate heat exchanger, a plurality of recesses 107a, 108a and ridges 107b, 108b are formed in the heat transfer regions 105, 106 (main heat transfer regions 105a, 106a, sub heat transfer regions 105b, 106b). Since it exists, 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 are disturbed, and high heat transfer efficiency can be obtained.

By the way, the sub-heat transfer region 105b included in the heat transfer region 105 of the first flow path demarcation region 101 with respect to the region including the first series passages Ra1 and Ra2 (first through hole 103) through which the first fluid A flows in and out. The sub-heat transfer regions 106b, which are adjacent to each other and are included in the heat transfer region 106 of the second flow path demarcation region 102, are the second continuous passages Rb1 and Rb2 (second through holes 104) through which the second fluid B flows in and out. Closely adjacent to the area containing.

Along with this, in order to improve the efficiency of the inflow and outflow of the first fluid A to the first flow path Ra, the ridges 107b in the entire sub-heat transfer region 105b included in the heat transfer region 105 of the first flow path demarcation region 101 are connected to each other. The distance between the ridges 107b in the entire main heat transfer region 105a included in the heat transfer region 105 of the first flow path demarcation region 101 is such that the distance between the ridges 107b adjacent to each other with a single dent 107a in between A range that is set wider than the spacing (distance between adjacent convex strips 107b with a single concave strip 107a in between) and corresponds to the secondary heat transfer region 105b of the first flow path Ra (the entrance / exit of the first flow path Ra). The flow resistance of the first fluid A in the vicinity of the series passage) is reduced.

Further, in order to improve the efficiency of the inflow and outflow of the second fluid B to and from the second flow path Rb, the ridges 108b in the entire sub-heat transfer region 106b included in the heat transfer region 106 of the second flow path demarcation region 102 are connected to each other. The distance between the ridges 108b located in the entire main heat transfer region 106a included in the heat transfer region 106 of the second flow path demarcation region 102 is such that the distance between the ridges 108b adjacent to each other with the single dent 108a interposed therebetween is the same. Is set wider than the distance between the protrusions 108b adjacent to each other with a single concave line 108a in between), and the range corresponding to the subheat transfer region 106b of the second flow path Rb (the entrance / exit of the second flow path Rb). The flow resistance of the second fluid B in the vicinity of the second continuous passage) is reduced.

However, if the flow resistance in the range corresponding to the secondary heat transfer region 105b in the first flow path Ra is small, the first fluid A flowing into the first flow path Ra from one of the first series passages Ra is a secondary in the first flow path Ra. In the range corresponding to the heat transfer region 105b, there is a tendency to reach the range corresponding to the main heat transfer region 105a in the shortest distance. Along with this, the first fluid A that has reached the range corresponding to the main heat transfer region 105a in the first flow path Ra exits at the shortest distance even in the range corresponding to the main heat transfer region 105a (the other first series passage). ) To be distributed. Therefore, in the first flow path Ra, the first fluid A tends to be difficult to spread over the entire range corresponding to the main heat transfer region 105a. In this respect, the same applies to the second flow path Rb.

Therefore, in the conventional plate heat exchanger, the heat exchange efficiency in the range corresponding to the main heat transfer regions 105a and 106a where the flow path widths of the first flow path Ra and the second flow path Rb are maximum becomes low. ..

Japanese Unexamined Patent Publication No. 2012-12268

Therefore, it is an object of the present invention to provide a plate type heat exchanger capable of increasing the heat exchange efficiency in the range where the flow path widths of the first flow path and the second flow path are maximized.

The plate heat exchanger according to the present invention includes a plurality of heat transfer plates stacked in the first direction, and each of the plurality of heat transfer plates defines a first flow path through which the first fluid flows. The first surface including the demarcation region and the second surface on the opposite side of the first surface and including the second flow path demarcation region defining the second flow path through which the second fluid flows. A pair of first through holes, each of which penetrates in the first direction within the first flow path demarcation region and is spaced apart in the second direction orthogonal to the first direction, each of which is first. A pair of first through holes that extend in the direction and form a first series of passages that communicate only with the first flow path, each of which penetrates in the first direction and is spaced in the second direction within the second flow path demarcation region. A pair of second through holes arranged above each other, each of which has a pair of second through holes extending in the first direction and forming a second through hole that communicates only with the second flow path. The path demarcation region and the second flow path demarcation region are heat transfer regions that exchange heat between the first fluid and the second fluid, and include heat transfer regions that overlap each other in the first direction, and the heat transfer region is a heat transfer region. The main heat transfer region including the intersection of the vertical center line extending in the second direction of the plate and the horizontal center line extending in the first direction and the third direction orthogonal to the second direction sandwiches the main heat transfer region in the second direction. A pair of sub-heat transfer regions, including a pair of sub-heat transfer regions whose dimensions in the third direction decrease as the distance from the main heat transfer region increases, and each of the pair of sub-heat transfer regions is main in the second direction. The first flow path includes a first region connected to the heat transfer region and a second region connected to the first region in the second direction, the dimension of which decreases in the third direction as the distance from the first region increases. In each of the second flow path and the second flow path, the flow resistance in the range corresponding to the first region is larger than the flow resistance in the range corresponding to the second region, and is larger than the flow resistance in the range corresponding to the first region. It is characterized in that it is configured so that the distribution resistance in the range corresponding to the main heat transfer region becomes large.

According to the above configuration, the first fluid flowing into the first flow path from the first series passage of any one of the pair of first series passages preferentially covers the range corresponding to the second region having a small flow resistance. To circulate. Then, since the first fluid is difficult to enter the first region by the shortest route due to the flow resistance of the first region, the subsequent first fluid spreads in the second direction or has a longer distance than the shortest route. As a result of passing through the route, the area corresponding to the second area in the first flow path is filled, and the entire range corresponding to the first area or substantially the entire area is entered.

Then, even if the first fluid passing through the shortest route precedes the first fluid passing through another route having a longer distance than the shortest route, the first fluid that reaches the range corresponding to the main heat transfer region in advance. Due to the flow resistance in the range corresponding to the main heat transfer region, the fluid passes through the shortest route as it is and becomes difficult to enter the main heat transfer region.

As a result, the first fluid that has passed through another route that is longer than the shortest route has caught up with or has almost caught up with the first fluid that has passed through the shortest route, and corresponds to the first region in the first flow path. The first fluid in the range enters in a balanced state with respect to the entire range or substantially the entire range corresponding to the main heat transfer region, and then flows in the second direction in the range corresponding to the main heat transfer region, and the other. It is discharged to one of the other first series passages through the range corresponding to the sub-heat transfer region of.

Further, the second fluid flowing into the second flow path from any one of the second communication passages preferentially flows in the range corresponding to the second region having a small flow resistance. Then, since the second fluid is difficult to enter the second region by the shortest route due to the flow resistance of the second region, the subsequent second fluid spreads in the second direction or has a longer distance than the shortest route. As a result of passing through the route, the area corresponding to the second area in the second flow path is filled, and the entire range corresponding to the second area or substantially the entire area is entered.

Then, even if the second fluid passing through the shortest route precedes the second fluid passing through another route having a longer distance than the shortest route, the second fluid reaches the range corresponding to the main heat transfer region in advance. Due to the flow resistance in the range corresponding to the main heat transfer region, the fluid passes through the shortest route as it is and becomes difficult to enter the main heat transfer region.

As a result, the second fluid that has passed through another route that is longer than the shortest route has caught up with or has almost caught up with the second fluid that has passed through the shortest route, and corresponds to the second region in the second flow path. After entering the second fluid in the range corresponding to the main heat transfer region in a balanced state with respect to the entire range or substantially the entire range, the second fluid circulates in the second direction in the range corresponding to the main heat transfer region. It is discharged to any other secondary passage through the range corresponding to the other sub-heat transfer region.

As a result, the plate heat exchanger having the above configuration can exert an excellent effect that the heat exchange efficiency can be increased in the range where the flow path width is maximum (the range corresponding to the main heat transfer region).

As one aspect of the present invention, a plurality of recesses and protrusions are formed in the heat transfer region of the first flow path demarcation region, and the heat transfer region of the second flow path demarcation region is formed in the first flow path demarcation region. A convex portion having a front-back relationship with the concave portion of the heat transfer region and a concave portion having a front-back relationship with the convex portion of the heat transfer region in the first flow path demarcation region are formed, and the first flow path demarcation region and the second flow path demarcation region are formed. In each heat transfer region, the concave portions and the convex portions are alternately arranged in a predetermined direction, and the distance between the convex portions adjacent to each other across the concave portion in the second region is adjacent to each other across the concave portion in the first region. It is wider than the distance between the convex parts, and the distance between the convex parts adjacent to each other across the concave portion in the first region is set wider than the distance between the convex parts adjacent to each other across the concave portion in the main heat transfer region. May be good.

In this way, in each of the first flow path and the second flow path, the protrusions correspond to the respective regions of the main heat transfer region and the sub heat transfer region (first region and second region). It is possible to impart a distribution resistance corresponding to the interval of.

In this case, the concave portions and the convex portions in at least one of the main heat transfer region, the first region of the secondary heat transfer region, and the second region of the secondary heat transfer region alternate between the concave portions and the convex portions. Concavities and ridges extending in a direction orthogonal to a predetermined direction arranged in line with each other, and the ridges in any one of the adjacent heat transfer plates may intersect with each other.

By doing so, the flow of the first fluid is disturbed in the first flow path, and the flow of the second fluid is disturbed in the second flow path. This enhances the heat exchange efficiency between the first fluid and the second fluid.

As another aspect of the present invention, the pair of first through holes and the pair of second through holes are arranged at intervals in the third direction, and the second region is the first through holes adjacent to each other in the third direction. It is preferably arranged between the second through hole and the first through hole and the second through hole adjacent to each other in the third direction and the main heat transfer region.

By doing so, the first fluid flowing into the first flow path from the first through hole can be preferentially circulated toward the second region, which is the upstream region in the first flow path, and not only the shortest route but also the shortest route can be circulated. The first fluid can be circulated to another route that is longer than the shortest route. As a result, the first fluid can be filled in the entire range or substantially the entire range corresponding to the second region in the first flow path, and the first fluid can be circulated to the downstream side. In addition, the second fluid flowing into the second flow path from the second through hole can be preferentially circulated toward the second region, which is the upstream region in the second flow path, and not only the shortest route but also the shortest route. The second fluid can be circulated to another route that is longer than that. As a result, the second fluid can be filled in the entire range or substantially the entire range corresponding to the second region in the second flow path, and the second fluid can be circulated to the downstream side.

According to the present invention, it is possible to obtain an excellent effect that the heat exchange efficiency can be increased in the range where the flow path widths of the first flow path and the second flow path are maximized.

FIG. 1 is a schematic exploded perspective view of a plate heat exchanger according to an embodiment of the present invention. FIG. 2 is a view of the heat transfer plate (first heat transfer plate) of the plate heat exchanger according to the same embodiment as viewed from the front surface side. FIG. 3 is a view of the heat transfer plate (first heat transfer plate) of the plate heat exchanger according to the same embodiment as viewed from the second surface side. FIG. 4 is a view of the heat transfer plate (second heat transfer plate) of the plate heat exchanger according to the same embodiment as viewed from the front surface side. FIG. 5 is a view of the heat transfer plate (second heat transfer plate) of the plate heat exchanger according to the same embodiment as viewed from the second surface side. FIG. 6 is an enlarged view of the VI portion of FIG. FIG. 7 is an enlarged view of the VII portion of FIG. FIG. 8 is an enlarged view of the VIII portion of FIG. FIG. 9 is an enlarged view of the IX portion of FIG. FIG. 10 is a diagram for explaining the flow of the first fluid in the first flow path of the plate heat exchanger according to the embodiment. FIG. 11 is a diagram for explaining the flow of the second fluid in the second flow path of the plate heat exchanger according to the embodiment. FIG. 12 is a view of the heat transfer plate of the conventional plate heat exchanger as viewed from the front surface side. FIG. 13 is a view of the heat transfer plate of the conventional plate heat exchanger as viewed from the second surface side. FIG. 14 is a diagram for explaining the flow of the first fluid in the first flow path of the conventional plate heat exchanger. FIG. 15 is a diagram for explaining the flow of the second fluid in the second flow path of the conventional plate heat exchanger.

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

As shown in FIG. 1, the plate heat exchanger 1 includes a plurality of heat transfer plates 2 and 3 stacked in the first direction. In the present embodiment, the plate heat exchanger 1 includes a plurality of heat transfer plates 2 and 3 and gaskets 4 (4a, 4b, 4c) interposed between adjacent heat transfer plates 2 and 3 in the first direction. , 4d) and a pair of end plates 5 and 6 that sandwich the plurality of superposed heat transfer plates 2 and 3 from the first direction.

As shown in FIGS. 2 to 5, each of the plurality of heat transfer plates 2 and 3 is formed in a rectangular shape when viewed from the first direction. In the present embodiment, the heat transfer plates 2 and 3 are set so that the outer dimensions of the second direction orthogonal to the first direction are larger than the outer dimensions of the first direction and the third direction orthogonal to the second direction. It is formed in a rectangular shape that is long in the direction.

Each of the plurality of heat transfer plates 2 and 3 has a first surface Sa including first flow path defining regions 20 and 30 defining a first flow path Ra (see FIG. 1) through which the first fluid A flows, and the first surface Sa. A second surface Sb on the opposite side of the surface Sa, including the second flow path defining regions 21 and 31 that define the second flow path Rb (see FIG. 1) through which the second fluid B flows. Has. Further, the plurality of heat transfer plates 2, 3 are a pair of first through holes 22, each of which penetrates in the first flow path demarcation region 20 and 30 in the first direction and is arranged at intervals in the second direction. 32, a pair of first through holes 22 and 32, each of which extends in the first direction and forms a first series of passages Ra1 and Ra2 (see FIG. 1) that extend in the first direction and communicate only with the first passage Ra, respectively. A pair of second through holes 23, 33 penetrating in the first direction and spaced apart in the second direction within the two flow path demarcation regions 21, 31, each extending in the first direction. It has a pair of second through holes 23, 33 forming second passages Rb1 and Rb2 (see FIG. 1) that communicate only with the two passages Rb.

Along with this, the heat transfer plates 2 and 3 according to the present embodiment are endless annular first seal planned regions 24 and 34 along the contours of the first flow path defining regions 20 and 30 on the first surface Sa. , Along the contours of the first sealed planned areas 24 and 34 in which the gasket 4 (first gasket 4a (see FIG. 1) described later) is arranged and the second flow path defining areas 21 and 31 on the second surface Sb. Endless annular second sealed planned areas 25 and 35, on the second sealed planned areas 25 and 35 on which the gasket 4 (second gasket 4b described later (see FIG. 1)) is arranged, and on the first surface Sa. A pair of third seal planned areas 26 and 36 surrounding each of the two second through holes 23 and 33 deviating from the first flow path demarcation areas 20 and 30, respectively, and each of the gasket 4 (the third gasket 4c described later). (See FIG. 1))) is arranged in the pair of planned third seal regions 26 and 36, and the two first through holes 22 and 32 deviated from the second flow path demarcation regions 21 and 31 on the second surface Sb, respectively. It has a pair of fourth-sealed planned areas 27 and 37 surrounding the above, and each has a pair of fourth-sealed planned areas 27 and 37 in which a gasket 4 (fourth gasket 4d described later (see FIG. 1)) is arranged. ..

The first flow path demarcation areas 20 and 30 and the second flow path demarcation areas 21 and 31 are heat transfer areas 200, 210, 300 and 310 for heat exchange between the first fluid A and the second fluid B, and are the first. Includes heat transfer regions 200, 210, 300, 310 that overlap each other in the direction.

The heat transfer regions 200 and 300 of the first flow path demarcation regions 20 and 30 are regions where the first through holes 22 and 32 are hesitated, and the heat transfer regions 210 and 310 of the second flow path demarcation regions 21 and 31 are the first. (2) This is a region where the through holes 23 and 33 are hesitated.

More specifically, the first flow path demarcation regions 20 and 30 are the heat transfer regions 200 and 300 and the two first through hole forming regions 201 and 301 arranged so as to sandwich the heat transfer regions 200 and 300 in the second direction. It includes two first through hole forming regions 201, 301, each having first through holes 22, 32. On the other hand, the second flow path demarcating regions 21 and 31 are the heat transfer regions 210 and 310 and the two second through hole forming regions 211 and 311 arranged so as to sandwich the heat transfer regions 210 and 310 in the second direction. It includes two second through hole forming regions 211, 311 each having second through holes 23, 33.

The heat transfer regions 200, 210, 300, 310 are regions including the vertical center line CL1 extending in the second direction or the horizontal center line CL2 extending in the third direction. On the other hand, each of the first through hole forming regions 201, 301 and the second through hole forming regions 211, 311 is a region deviating from the vertical center line CL1 and the horizontal center line CL2. That is, the first through hole forming regions 201 and 301 are two regions of the four regions in which the heat transfer plates 2 and 3 are separated by the vertical center line CL1 and the horizontal center line CL2, and are in the second direction. The second through-hole forming regions 211 and 311 are arranged in two side-by-side regions, and the second through-hole forming regions 211 and 311 form the first through-hole among the four regions in which the heat transfer plates 2 and 3 are separated by the vertical center line CL1 and the horizontal center line CL2. The two regions are different from the regions where the regions 201 and 301 are arranged, and are arranged in the two regions arranged in the second direction.

In the present embodiment, the two first through hole forming regions 201, 301 (first through holes 22, 32) are four regions in which the heat transfer plates 2 and 3 are separated by the vertical center line CL1 and the horizontal center line CL2. Of these, two regions are arranged on one end side of the vertical center line CL1 of the heat transfer plates 2 and 3 in the third direction, and the two second through hole forming regions 211 and 311 (second through holes 23 and 33) are arranged. ) Is located on the other end side of the vertical center line CL1 of the heat transfer plates 2 and 3 in the third direction among the four regions of the heat transfer plates 2 and 3 separated by the vertical center line CL1 and the horizontal center line CL2. It is placed in two areas.

In the present embodiment, the size of the first flow path demarcating regions 20 and 30 in the second direction is the first through hole forming region 201, 301 (the first through hole forming region 201, 301) included by itself among the two regions separated by the vertical center line CL1. It becomes smaller from one region side where one through hole 22, 32) exists toward the other region.

Along with this, the first flow path demarcation regions 20 and 30 are formed in a trapezoidal shape. That is, the first flow path demarcation regions 20 and 30 have a first side along one end in the third direction (first side extending in the second direction) and a second side along the other end in the third direction (second side). A second side extending in the direction), which is defined by a second side shorter than the first side in the second direction and a pair of inclined sides connecting both ends of the first side and both ends of the second side. ..

In the present embodiment, the size of the second flow path demarcating regions 21 and 31 in the second direction is the second through hole forming region 211, 311 included by itself among the two regions separated by the vertical center line CL1 ( It becomes smaller from one region side where the second through holes 23, 33) are present toward the other region.

Along with this, the second flow path demarcation regions 21 and 31 are formed in a trapezoidal shape. The first side along the other end of the third direction (the first side extending in the second direction) and the second side along one end of the third direction (the second side extending in the second direction). It is defined by a second side, which is shorter than the first side in two directions, and a pair of inclined sides connecting both ends of the first side and both ends of the second side.

The first side that defines the first flow path demarcation areas 20 and 30 and the first side that defines the second flow path demarcation areas 21 and 31 are arranged symmetrically with respect to the vertical center line CL1 and demarcate the first flow path. The second side defining the areas 20 and 30 and the second side defining the second flow path defining areas 21 and 31 are arranged symmetrically with respect to the vertical center line CL1. That is, the first flow path demarcation areas 20 and 30 and the second flow path demarcation areas 21 and 31 are arranged symmetrically with respect to the vertical center line CL1, and the inclined sides and the first flow path defining the first flow path demarcation areas 20 and 30 are defined. The inclined sides defining the two flow path demarcation regions 21 and 31 intersect with each other when viewed from the first direction.

Along with this, the heat transfer regions 200 and 300 of the first flow path demarcation regions 20 and 30 and the heat transfer regions 210 and 310 of the second flow path demarcation regions 21 and 31 overlap when viewed from the first direction. That is, the heat transfer regions 200 and 300 of the first flow path demarcation regions 20 and 30 and the heat transfer regions 210 and 310 of the second flow path demarcation regions 21 and 31 coincide with each other when viewed from the first direction.

In the first flow path demarcation areas 20 and 30 and the second flow path demarcation areas 21 and 31, the heat transfer areas 200, 210, 300 and 310 are the vertical center lines CL1 and the horizontal center lines CL2 of the heat transfer plates 2 and 3, respectively. The main heat transfer regions 202, 212, 302, 312 including the intersection with and the pair of sub heat transfer regions 203, 213, 303, 313 sandwiching the main heat transfer regions 202, 212, 302, 312 in the second direction. It includes a pair of sub-heat transfer regions 203, 213, 303, 313 whose dimensions in the third direction decrease as the distance from the main heat transfer regions 202, 212, 302, 312 increases.

In the present embodiment, the heat transfer regions 200, 210, 300, 310 of the first flow path demarcation area 20, 30 and the second flow path demarcation area 21, 31 are the square main heat transfer areas 202, 212, 302, 312. And a pair of sub-heat transfer regions 203, 213, 303, 313, each of which has a triangular shape, and a pair of sub-heat transfer regions 203, which are arranged so as to sandwich the main heat transfer regions 202, 212, 302, 312. 213, 303, 313 and so on. Along with this, the heat transfer regions 200, 210, 300, 310 according to the present embodiment are the first sides of each other that define the first flow path demarcation areas 20, 30 and the second flow path demarcation areas 21, 31 respectively. It is a substantially hexagonal area defined by a part of the hypotenuse. Along with this, in the present embodiment, the first through hole forming regions 201 and 301 are connected to one of the two hypotenuses defining the triangular subheat transfer regions 203 and 303, and the second through hole is formed. The formation regions 211 and 311 are connected to the other hypotenuse of the two hypotenuses defining the triangular sub-heat transfer regions 213 and 313.

The pair of sub-heat transfer regions 203, 213, 303, 313 are the first regions 203a, 213a, 303a, 313a connected to the main heat transfer regions 202, 212, 302, 312 in the second direction, and the first in the second direction. The second regions 203b, 213b, 303b, 313b connected to the regions 203a, 213a, 303a, 313a, and the second region 203b, whose dimensions in the third direction become smaller as the distance from the first regions 203a, 213a, 303a, 313a increases. 213b, 303b, 313b and the like.

As shown in FIGS. 2 to 9, in the heat transfer regions 200 and 300 of the first flow path demarcation regions 20 and 30, a plurality of recesses 204a for imparting flow resistance to the first fluid A flowing through the first flow path Ra. , 205a, 206a, 304a, 305a, 306a and convex portions 204b, 205b, 206b, 304b, 305b, 306b are formed, and the second flow is formed in the heat transfer regions 210 and 310 of the second flow path demarcation regions 21 and 31. A plurality of recesses 214a, 215a, 216a, 314a, 315a, 316a and convex portions 214b, 215b, 216b, 314b, 315b, 316b for imparting flow resistance to the second fluid B flowing through the path Rb are formed.

Recesses 204a, 205a, 206a, 214a, 215a, 216a, 304a in the heat transfer regions 200, 300 of the first flow path demarcation areas 20 and 30 and the heat transfer areas 210, 310 of the second flow path demarcation areas 21, 31 respectively. , 305a, 306a, 314a, 315a, 316a and the protrusions 204b, 205b, 206b, 214b, 215b, 216b, 304b, 305b, 306b, 314b, 315b, 316b are alternately arranged in a predetermined direction.

The heat transfer plates 2 and 3 are press-molded metal plates. Along with this, the recesses 204a, 205a, 206a, 304a, 305a, 306a of the heat transfer regions 200 and 300 of the first flow path demarcation areas 20 and 30 and the heat transfer areas 210 and 310 of the second flow path demarcation areas 21 and 31 The convex portions 214b, 215b, 216b, 314b, 315b, and 316b are in a front-to-back relationship. Further, the convex portions 204b, 205b, 206b, 304b, 305b, 306b of the heat transfer regions 200 and 300 of the first flow path demarcation regions 20 and 30 and the heat transfer regions 210 and 310 of the second flow path demarcation regions 21 and 31. The recesses 214a, 215a, 216a, 314a, 315a, and 316a are in a front-to-back relationship.

In the plate heat exchanger 1 according to the present embodiment, in each of the first flow path Ra and the second flow path Rb, the second region is larger than the flow resistance in the range corresponding to the first region 203a, 213a, 303a, 313a. The distribution resistance in the range corresponding to 203b, 213b, 303b, 313b is large, and the main heat transfer region 202, 212, 302, 312 is larger than the distribution resistance in the range corresponding to the second regions 203b, 213b, 303b, 313b. It is configured to increase the distribution resistance in the range corresponding to.

Specifically, in each of the heat transfer plates 2 and 3, the convex portions 205b, 215b, 305b, 315b adjacent to each other with the recesses 205a, 215a, 305a, 315a sandwiched in the second regions 203b, 213b, 303b, 313b. The distance is wider than the distance between the convex portions 204b, 214b, 304b, 314b adjacent to each other across the recesses 204a, 214a, 304a, 314a in the first region 203a, 213a, 303a, 313a, and the distance is wider than the distance between the first regions 203a, 213a. , 303a, 313a, the distance between the convex portions 204b, 214b, 304b, 314b adjacent to each other with the concave portions 204a, 214a, 304a, 314a sandwiched between them, and the distance between the concave portions 206a, 216a in the main heat transfer regions 202, 212, 302, 312a. , 306a, 316a are set wider than the distance between the adjacent convex portions 206b, 216b, 306b, 316b.

In the present embodiment, the recesses 204a, 205a, 206a, 214a in the main heat transfer regions 202, 212, 302, 312, the first region 203a, 213a, 303a, 313a, and the second regions 203b, 213b, 303b, 313b, 215a, 216a, 304a, 305a, 306a, 314a, 315a, 316a and the convex portions 204b, 205b, 206b, 214b, 215b, 216b, 304b, 305b, 306b, 314b, 315b, 316b are the recesses 204a, 205a, 206a. , 214a, 215a, 216a, 304a, 305a, 306a, 314a, 315a, 316a and the convex portions 204b, 205b, 206b, 214b, 215b, 216b, 304b, 305b, 306b, 314b, 315b, 316b are arranged alternately. Concave and convex lines extending in a direction orthogonal to a predetermined direction.

Therefore, the distance between the ridges 205b, 215b, 305b, 315b adjacent to each other with the concave portions 205a, 215a, 305a, 315a in the second region 203b, 213b, 303b, 313b is the distance between the first regions 203a, 213a, 303a. , 313a, wider than the distance between the adjacent protrusions 204b, 214b, 304b, 314b with the concave portions 204a, 214a, 304a, 314a in between, and the concave portions 204a, in the first region 203a, 213a, 303a, 313a. The distance between the convex strips 204b, 214b, 304b, 314b adjacent to each other across the 214a, 304a, 314a is adjacent to the concave strips 206a, 216a, 306a, 316a in the main heat transfer regions 202, 212, 302, 312. It is set wider than the distance between the matching ridges 206b, 216b, 306b, and 316b.

Recesses 204a, 205a, 206a, 214a, 215a, 216a in the main heat transfer regions 202, 212, 302, 312, the first region 203a, 213a, 303a, 313a, and the second regions 203b, 213b, 303b, 313b, 304a, 305a, 306a, 314a, 315a, 316a and ridges 204b, 205b, 206b, 214b, 215b, 216b, 304b, 305b, 306b, 314b, 315b, 316b are the vertical center line CL1 and the horizontal center line CL2, respectively. It extends in the direction of intersection with respect to. As a result, the main heat transfer regions 202, 212, 302, 312 and the sub heat transfer regions 203, 213, 303, 313 (first region 203a, 213a, 303a, 313a, second region) of the adjacent heat transfer plates 2, 3 The ridges 204b, 205b, 206b, 214b, 215b, 216b, 304b, 305b, 306b, 314b, 315b, 316b in 203b, 213b, 303b, 313b) intersect each other.

In the present embodiment, the plurality of heat transfer plates 2 and 3 have recesses (recesses) 204a, 205a, 206a, 214a, 215a, 216a, 304a, 305a, 306a, in the heat transfer regions 200, 210, 300, 310. Two types of heat transfer with different forms (arrangements) of 314a, 315a, 316a, and convex portions (convex) 204b, 205b, 206b, 214b, 215b, 216b, 304b, 305b, 306b, 314b, 315b, 316b. Plates 2 and 3 are included.

Specifically, the plurality of heat transfer plates 2 and 3 include a first heat transfer plate 2 and a second heat transfer plate 3 having higher heat exchange performance than the first heat transfer plate 2.

In the first heat transfer plate 2, the inclination angle of the concave portions 206a, 216a and the convex portions 206b, 216b of the main heat transfer regions 202 and 212 with respect to the horizontal center line CL2 is set to the main heat transfer regions 302 in the second heat transfer plate 3. It is set to be larger than the inclination angle of the concave grooves 306a, 316a and the convex grooves 306b, 316b of 312 with respect to the lateral center line CL2. That is, the concave grooves 306a, 316a and the convex 306b, 316b of the main heat transfer regions 302, 312 in the second heat transfer plate 3 having high heat exchange performance are the main heat transfer regions 202, 212 in the first heat transfer plate 2. It is arranged so as to block the flow of fluid more than the recesses 206a, 216a and the protrusions 206b, 216b.

In the present embodiment, the main heat transfer regions 202, 212, 302, 312 are divided into four regions in the third direction. That is, each of the two regions with the vertical center line CL1 as a boundary is further divided into two regions. As a result, the main heat transfer regions 202, 212, 302, 312 are the center side region (not numbered) on the vertical center line CL1 side and the center side region (not numbered) in each of the two regions bordered by the vertical center line CL1. Includes the outer region (not numbered) that is outer in the third direction.

In each of the four regions (central region and outer region) in the main heat transfer regions 202, 212, 302, 312, concave grooves 206a, 216a, 306a, 316a and convex grooves 206b, 216b, 306b, 316b are vertically formed. It extends in the inclined direction with respect to the center line CL1.

Specifically, in each of the two regions in the main heat transfer regions 202, 212, 302, 312 with the vertical center line CL1 as a boundary, the concave grooves 206a, 216a, 306a, 316a and the convex stripes in the central region. The 206b, 216b, 306b, 316b are inclined in the direction opposite to the inclination direction of the concave portions 206a, 216a, 306a, 316a and the convex portions 206b, 216b, 306b, 316b in the outer region.

The concave grooves 206a, 216a, 306a, 316a and the convex grooves 206b, 216b, 306b, 316b of the two regions in the main heat transfer regions 202, 212, 302, 312 with the vertical center line CL1 as the boundary are formed. They are arranged symmetrically with respect to the vertical center line CL1.

The concave grooves 204a, 214a, 304a, 314a and the convex grooves 204b, 214b, 304b, 314b of the first regions 203a, 213a, 303a, 313a of one of the secondary heat transfer regions 203, 213, 303, 313 are all main heat transfer regions. In the same direction as the recesses 206a, 216a, 306a, 316a and the protrusions 206b, 216b, 306b, 316b in the central region in one region of the thermal regions 202, 212, 302, 312 with the vertical center line CL1 as the boundary. The dents 204a, 214a, 304a, 314a and the ridges 204b, 214b, 304b, 314b of the first regions 203a, 213a, 303a, 313a of the other sub-heat transfer regions 203, 213, 303, 313 are all extended. Same as the concave lines 206a, 216a, 306a, 316a and the convex lines 206b, 216b, 306b, 316b in the center side region in the other region of the main heat transfer regions 202, 212, 302, 312 with the vertical center line CL1 as the boundary. It extends in the direction.

The first sealing planned areas 24 and 34 are formed along the contours of the first flow path demarcating areas 20 and 30 on the first surface Sa. That is, the first sealed planned areas 24 and 34 are formed along the first side, the second side, and the pair of inclined sides that define the first flow path defining areas 20 and 30. On the other hand, the second seal planned regions 25 and 35 are formed along the contours of the second flow path demarcation regions 21 and 31 on the second surface Sb. That is, the second seal planned regions 25 and 35 are formed along the first side, the second side, and the pair of inclined sides that define the second flow path demarcation regions 21 and 31. In the present embodiment, the second sealed planned areas 25 and 35 are formed on the surface opposite to the surface on which the first sealed planned areas 24 and 34 are formed, but the virtual axis extending in the first direction is used as a reference. Therefore, it is formed so as to be rotationally symmetric with respect to the planned first seal regions 24 and 34. That is, the first flow path demarcation areas 20 and 30 and the second flow path demarcation areas 21 and 31 have shapes that are rotationally symmetric with respect to the virtual axis extending in the first direction.

The third sealed planned areas 26 and 36 are formed on the same surface as the first sealed planned areas 24 and 34, and are deviated from the first flow path demarcated areas 20 and 30 surrounded by the first sealed planned areas 24 and 34. (Ii) Surround the outer circumferences of the through holes 23 and 33. In the present embodiment, the third seal planned area 26, 36 is formed so as to partially overlap with the second seal planned area 25, 35 on the back side when viewed from the first direction.

The fourth sealed planned areas 27 and 37 are formed on the same surface as the second sealed planned areas 25 and 35, and deviate from the second flow path demarcating areas 21 and 31 surrounded by the second sealed planned areas 25 and 35. Surround the outer periphery of the first through holes 22 and 32. In the present embodiment, the fourth sealed planned areas 27 and 37 are formed so as to partially overlap with the first sealed planned areas 24 and 34 on the back side when viewed from the first direction.

In the present embodiment, the first through holes 22, 32 and the second through holes 23, 33 are formed in a circular shape. Along with this, each of the third seal planned area 26, 36 and the fourth seal planned area 27, 37 is formed in an annular shape.

The first sealed planned area 24,34, the second sealed planned area 25,35, the third sealed planned area 26,36, and the fourth sealed planned area 27,37 are the first flow path demarcated areas 20, 30 in the first direction. Tops of ridges 204b, 205b, 206b, 214b, 215b, 216b, 304b, 305b, 306b, 314b, 315b, 316b and second flow path demarcation regions 21, 31 in the heat transfer regions 200, 210, 300, 310. It is a middle stage portion in the middle position with the top of the protrusions 204b, 205b, 206b, 214b, 215b, 216b, 304b, 305b, 306b, 314b, 315b, 316b in the heat transfer regions 200, 210, 300, 310. ..

In the present embodiment, as the gasket 4, the plate heat exchanger 1 includes an endless annular first gasket 4a arranged in the first sealing planned areas 24 and 34 as shown in FIGS. 1, 10 and 11. An endless annular second gasket 4b arranged in the second sealed planned area 25, 35, an endless annular third gasket 4c arranged in the third sealed planned area 26, 36, and a fourth sealed planned area 27,37. It is provided with an endless annular fourth gasket 4d arranged in.

Since the first seal planned area 24,34 and the third seal planned area 26, 36 are arranged on the same surface, in the present embodiment, the first gasket 4a and the second gasket 4b are partially connected and integrated. It is molded. Further, since the second seal planned area 25, 35 and the fourth seal planned area 27, 37 are arranged on the same surface, the second gasket 4b and the fourth gasket 4d are partially connected in the present embodiment. Is integrally molded.

Returning to FIG. 1, one of the pair of end plates 5 and 6 has one end plate 5 penetrating at a position corresponding to the first through holes 22 and 32 and the second through holes 23 and 33 of the heat transfer plates 2 and 3. It has a plate body 50 having a hole (not shown), and a tubular nozzle 51 provided corresponding to the through hole and protruding from the outer surface of the plate body 50 so that a pipe can be connected. On the other hand, the other end plate 6 of the pair of end plates 5 and 6 is composed of a plate having no through hole.

In the plate heat exchanger 1, the plurality of heat transfer plates 2 and 3 having the above configuration are superposed in the first direction, so that the plurality of heat transfer plates 2 and 3 have their first surface Sa in the first direction. While facing the first surface Sa of the adjacent heat transfer plates 2 and 3 on one side, the second surface Sb of itself faces the second surface Sb of the adjacent heat transfer plates 2 and 3 on the other side in the first direction. Let me.

In the plate heat exchanger 1 according to the present embodiment, the first heat transfer plate 2 and the second heat transfer plate 3 are alternately arranged in the first direction.

Along with this, the first gasket 4a and the second gasket 4b are alternately arranged in the first direction with the heat transfer plates 2 and 3 as boundaries. The same applies to the third gasket 4c and the fourth gasket 4d. That is, as shown in FIGS. 10 and 11, the first sealed region 24 on the first surface Sa of one of the adjacent heat transfer plates 2 and 3 and the other heat transfer plate 3 A first gasket 4a is arranged between the first surface Sa and the planned first seal area 34, and is placed on the second surface Sb of one of the adjacent heat transfer plates 2 and 3 of the heat transfer plate 2. A second gasket 4b is arranged between a certain second seal scheduled area 25 and a second sealed planned area 35 on the second surface Sb of the other heat transfer plate 3.

Further, the third seal planned region 26 on the first surface Sa of one of the adjacent heat transfer plates 2 and 3 and the third surface Sa on the first surface Sa of the other heat transfer plate 3. A third gasket 4c is arranged between the planned sealing area 36 and the fourth planned sealing area 27, 37 on the second surface Sb of one of the adjacent heat transfer plates 2 and 3. A fourth gasket 4d is arranged between and the fourth sealed area 37 on the second surface Sb of the other heat transfer plate 3.

As a result, in the plate heat exchanger 1 according to the present embodiment, as shown in FIG. 1, the first flow path Ra through which the first fluid A is circulated and the second flow path Rb through which the second fluid B is circulated are transmitted. It is formed alternately in the first direction with the heat plates 2 and 3 as boundaries. Further, in the plate heat exchanger 1, each of the four through holes of the plurality of heat transfer plates 2 and 3 is connected in the first direction, and a pair of first series for allowing the first fluid A to flow in and out of the first flow path Ra. The passages Ra1 and Ra2 and a pair of second continuous passages Rb1 and Rb2 that allow the first fluid A to flow in and out of the second flow path Rb are formed.

The plate heat exchanger 1 according to the present embodiment is as described above, and as shown in FIG. 10, when the first fluid A is supplied to one of the first series passages Ra1, the first fluid A becomes the first fluid A. It flows into one passage Ra and tries to circulate toward the other first series passage Ra2.

Then, conventionally, the first fluid A corresponds to the main heat transfer regions 202 and 302 through the shortest route where the distance from one of the first series passages Ra1 to the main heat transfer regions 202 and 302 is the shortest distance. In the plate heat exchanger 1 according to the present embodiment, the first fluid A flowing into the first flow path Ra is circulated in the range corresponding to the main heat transfer regions 202 and 302. , The second direction, the third direction, and the combined direction of the second direction and the third direction, and reach the entire range corresponding to the main heat transfer regions 202 and 302 in the second direction.

Specifically, the sub-heat transfer regions 203 and 303 of the first flow path demarcation regions 20 and 30 that define the first flow path Ra include the first regions 203a and 303a and the second regions 203b and 303b, and the first region. The distribution resistance in the range corresponding to 203a and 303a is larger than the distribution resistance in the range corresponding to the second regions 203b and 303b.

Therefore, the first fluid A that has flowed into the first flow path Ra preferentially flows in the range corresponding to the second regions 203b and 303b having a small flow resistance, and the entire range or substantially the entire range corresponding to the second regions 203b and 303b. Spread to.

In particular, in the present embodiment, the second regions 203b and 303b are located between the first through holes 22 and 32 and the second through holes 23 and 33 (first series passage Ra1) arranged at intervals in the second direction. The first fluid A flowing in from the first series passage Ra1 is located in the first region 203a, 303a (the first region 203a, 303a) on the second direction side with respect to the first series passage Ra1. The range corresponding to the second regions 203b and 303b in the first flow path Ra (the third direction or the third direction) rather than the range corresponding to the first regions 203a and 303a having a larger distribution resistance than the range corresponding to the two regions 203b and 303b). Priority is given to distribution in the direction of combination of the two directions and the third direction).

In this case as well, the first fluid A also exists to pass through the shortest route, but in the present embodiment, the distribution resistance in the range corresponding to the first regions 203a and 303a corresponds to the second regions 203b and 303b. Since it is larger than the flow resistance in, the first fluid A that reaches the range corresponding to the first regions 203a and 303a first has the flow resistance in the range corresponding to the first regions 203a and 303a of the first flow path Ra. Receive. As a result, the first fluid A passes through the shortest route as it is and is difficult to enter the first regions 203a and 303a. Therefore, the subsequent first fluid A spreads in the second direction or has a longer distance than the shortest route. You will have to take another long route.

As a result, the first fluid A fills the range corresponding to the second regions 203b and 303b in the first flow path Ra, and enters the entire range or substantially the entire range corresponding to the first regions 203a and 303a.

In this state, the first fluid A passing through the shortest route having the shortest distance from one of the first series passages Ra1 to the main heat transfer regions 202 and 302 passes through another route having a longer distance than the shortest route. Even if it precedes A, in the present embodiment, the flow resistance in the range corresponding to the main heat transfer regions 202 and 302 is larger than the flow resistance in the range corresponding to the first regions 203a and 303a. The first fluid A, which has reached the range corresponding to the main heat transfer regions 202 and 302 in advance, receives the flow resistance in the main heat transfer regions 202 and 302 of the first flow path Ra and passes through the shortest route as it is. It becomes difficult to enter the main heat transfer areas 202 and 302.

As a result, the first fluid A passing through another route having a longer distance than the shortest route is in a state of catching up with the first fluid A passing through the shortest route, and becomes the first regions 203a and 303a in the first flow path Ra. The first fluid A in the corresponding range enters in a balanced state with respect to the entire range or substantially the entire range corresponding to the main heat transfer regions 202 and 302.

Then, the first fluid A flows in the second direction within the corresponding range of the main heat transfer regions 202 and 302, and reaches the second regions 203b and 303b of the other sub heat transfer regions 203 and 303. As described above, the distribution resistance in the range corresponding to the main heat transfer regions 202 and 302 is larger than the distribution resistance in the range corresponding to the first regions 203a and 303a (the range corresponding to the main heat transfer regions 202 and 302). Since the flow resistance in the range corresponding to the first regions 203a and 303a is smaller than the flow resistance), the first fluid A that has passed through the range corresponding to the main heat transfer regions 202 and 302 is in the other sub-heat transfer region. The range corresponding to the first regions 203a and 303a of 203 and 303 is smoothly distributed.

Further, the distribution resistance in the range corresponding to the first regions 203a and 303a is larger than the distribution resistance in the range corresponding to the second regions 203b and 303b (more than the distribution resistance in the range corresponding to the first regions 203a and 303a). Since the flow resistance in the range corresponding to the second regions 203b and 303b is smaller), the first fluid A smoothly passes through the range corresponding to the second regions 203b and 303b and the other first series passage. It flows out to Ra2.

The same applies to the second fluid B in this respect. Specifically, as shown in FIG. 11, when the second fluid B is supplied to one of the second passages Rb1, the second fluid B flows into the second passage Rb and the other second passage Rb. Attempts to circulate toward passage Rb2.

Then, conventionally, the second fluid B reaches the main heat transfer regions 212 and 312 through the shortest route where the distance from one of the second continuous passages Rb1 to the main heat transfer regions 212 and 312 is the shortest distance. However, in the plate heat exchanger 1 according to the present embodiment, the second fluid B flowing into the second flow path Rb is in the second direction and the third. It spreads in the direction and in the combined direction of the second direction and the third direction, and reaches the entire range corresponding to the main heat transfer regions 212 and 312 in the second direction.

Specifically, the sub-heat transfer regions 213 and 313 of the second flow path demarcation regions 21 and 31 that define the second flow path Rb include the first regions 213a and 313a and the second regions 213b and 313b, and are the first. The distribution resistance in the range corresponding to the first regions 213a and 313a is larger than the distribution resistance in the range corresponding to the two regions 213b and 313b.

Therefore, the second fluid B flowing into the second flow path Rb preferentially flows in the range corresponding to the second regions 213b and 313b having a small flow resistance, and the entire range corresponding to the second regions 213b and 313b or abbreviated. Spreads over the entire area.

In particular, in the present embodiment, the first regions 213a and 313a are located between the first through holes 22 and 32 and the second through holes 23 and 33 (first series passage Ra2) arranged at intervals in the second direction. Since it is located between the second passage Rb1 and the second passage Rb1, the second fluid B flowing in from the second passage Rb1 has the first regions 213a and 313a (the first) on the second direction side with respect to the second passage Rb1. The range corresponding to the second regions 213b and 313b in the second flow path Rb (the third direction or the range corresponding to the first regions 213a and 313a) having a larger distribution resistance than the ranges corresponding to the two regions 213b and 313b). Priority is given to distribution toward the combined direction of the second direction and the third direction).

In this case as well, there is a second fluid B that tries to pass through the shortest route, but in the present embodiment, the flow resistance in the range corresponding to the first regions 213a and 313a corresponds to the second regions 213b and 313b. Since it is larger than the flow resistance in the range, the second fluid B that reaches the range corresponding to the first regions 213a and 313a first receives the flow resistance in the first regions 213a and 313a of the second flow path Rb. .. As a result, the second fluid B passes through the shortest route as it is, and it becomes difficult to enter the first regions 213a and 313a. Therefore, the subsequent second fluid B spreads in the second direction or has a longer distance than the shortest route. You will have to take another long route.

As a result, the second fluid B fills the range corresponding to the second regions 213b and 313b in the second flow path Rb, and enters the entire range or substantially the entire range corresponding to the first regions 213a and 313a.

In this state, the second fluid B passing through the shortest route having the shortest distance from one of the second communication passages Rb1 to the main heat transfer regions 212 and 312 passes through another route having a longer distance than the shortest route. Even if it precedes B, in the present embodiment, the flow resistance in the range corresponding to the main heat transfer regions 212 and 312 is larger than the flow resistance in the range corresponding to the first regions 213a and 313a. The second fluid B, which has reached the range corresponding to the main heat transfer regions 212 and 312 in advance, receives the flow resistance in the main heat transfer regions 212 and 312 of the second flow path Rb and passes through the shortest route as it is. Therefore, it becomes difficult to enter the main heat transfer areas 212 and 312.

As a result, the second fluid B passing through another route having a longer distance than the shortest route has caught up with the second fluid B passing through the shortest route, and the first regions 213a and 313a in the second flow path Rb are in a state of catching up. The second fluid B in the range corresponding to the above is entered in a balanced state with respect to the entire range or substantially the entire range corresponding to the main heat transfer regions 212 and 312.

Then, the second fluid B flows in the second direction within a range corresponding to the main heat transfer regions 212 and 312, and reaches the first regions 213a and 313a of the other sub heat transfer regions 213 and 313. As described above, the distribution resistance in the range corresponding to the main heat transfer regions 212 and 312 is larger than the distribution resistance in the range corresponding to the first regions 213a and 313a (the range corresponding to the main heat transfer regions 212 and 312). Since the flow resistance in the range corresponding to the first regions 213a and 313a is smaller than the flow resistance), the second fluid B passing through the range corresponding to the main heat transfer regions 212 and 312 is in the other sub heat transfer region. The range corresponding to the first regions 213a and 313a of 213 and 313 is smoothly distributed.

Further, the distribution resistance in the range corresponding to the first regions 213a and 313a is larger than the distribution resistance in the range corresponding to the second regions 213b and 313b (compared to the distribution resistance in the range corresponding to the first regions 213a and 313a). Since the flow resistance in the range corresponding to the second regions 213b and 313b is smaller), the second fluid B also smoothly passes through the range corresponding to the second regions 213b and 313b and the other second continuous passage. It flows out to Rb2.

As described above, the first fluid A flowing through the first flow path Ra and the second fluid B flowing through the second flow path Rb are the heat transfer plates 2 and 3 (heat transfer regions 200, 210, 300, 310). Since they indirectly face each other with the heat transfer plate 2, 3 (heat transfer regions 200, 210, 300, 310), they exchange heat with each other.

In the present embodiment, the heat transfer plates 2 and 3 (the heat transfer plates 2 and 3 adjacent to each other with the first surfaces Sa facing each other) defining the first flow path Ra are convex to each other over the entire heat transfer regions 200 and 300. Heat transfer plates 2 and 3 (second surface Sbs facing each other and adjacent to each other) 2 and 3 for crossing and colliding the strips 204b, 205b, 206b, 304b, 305b and 306b to define the second flow path Rb In 3), the protrusions 214b, 215b, 216b, 314b, 315b, and 316b cross each other over the entire heat transfer regions 210 and 310.

That is, the heat transfer plates 2 and 3 (the heat transfer plates 2 and 3 adjacent to each other with the first surfaces Sa facing each other) defining the first flow path Ra are the main heat transfer regions 202 and 302 of the heat transfer regions 200 and 300. Convex 206b, 306b, and convexes 204b, 205b, 304b, 305b of the sub-heat transfer regions 203, 303 (convex 204b, 304b of the first regions 203a, 303a, convex strips 204b, 304b of the second region 203b, 303b). The heat transfer plates 2 and 3 (the heat transfer plates 2 and 3 adjacent to each other with the second surfaces Sb facing each other) are the heat transfer regions 210. , 310 ridges 216b, 316b of the main heat transfer regions 212, 312, ridges 214b, 215b, 314b, 315b of the sub heat transfer regions 213, 313 (between the ridges 214b, 314b of the first regions 213a, 313a). , The ridges 215b, 315b of the second region 213b, 313b) are crossed and collided.

As a result, the flow of the first fluid A flowing in the first flow path Ra is disturbed in the entire range corresponding to the heat transfer regions 200 and 300, and the flow of the second fluid B flowing in the second flow path Rb is transmitted. It will be disturbed in the entire range corresponding to the thermal regions 210 and 310, and the heat exchange performance between the first fluid A and the second fluid B will be improved.

As described above, the plate heat exchanger 1 includes a plurality of heat transfer plates 2 and 3 stacked in the first direction, and each of the plurality of heat transfer plates 2 and 3 circulates the first fluid A. A first surface Sa including the first flow path defining areas 20 and 30 defining the first flow path Ra, and a second surface Sb on the opposite side of the first surface Sa, through which the second fluid B flows. It has a second surface Sb including the second flow path demarcation areas 21 and 31 that demarcate the path Rb, and each penetrates the first flow path demarcation area 20 and 30 in the first direction and is orthogonal to the first direction. A pair of first through holes 22 and 32 arranged at intervals in the second direction, each forming a first series of passages Ra1 and Ra2 extending in the first direction and communicating only with the first flow path Ra. The first through holes 22, 32 of the above, and a pair of second through holes 23, 33, each of which penetrates in the first direction and is spaced apart in the second direction within the second flow path demarcation regions 21, 31. The first flow path defining region 20 has a pair of second through holes 23, 33, each of which extends in the first direction and forms the second communication passages Rb1 and Rb2 communicating with only the second flow path Rb. , 30 and the second flow path demarcating regions 21, 31 are heat transfer regions 200, 210, 300, 310 for heat exchange between the first fluid A and the second fluid B, and heat transfer regions overlapping each other in the first direction. The heat transfer regions 200, 210, 300, 310 include the regions 200, 210, 300, 310, and the heat transfer regions 200, 210, 300, 310 are orthogonal to the vertical center line CL1 extending in the second direction of the heat transfer plates 2 and 3 in the first and second directions. A pair of sub-heat transfer regions sandwiching the main heat transfer region 202, 212, 302, 312 including the intersection with the horizontal center line CL2 extending in the third direction and the main heat transfer region 202, 212, 302, 312 in the second direction. 203,213,303,313, including a pair of sub-heat transfer regions 203,213,303,313 whose dimensions in the third direction decrease as the distance from the main heat transfer regions 202,212, 302,312 increases. Each of the pair of sub-heat transfer regions 203, 213, 303, 313 is the first region 203a, 213a, 303a, 313a connected to the main heat transfer regions 202, 212, 302, 312 in the second direction, and in the second direction. The second regions 203b, 213b, 303b, 313b connected to the first regions 203a, 213a, 303a, 313a, and the second region whose dimensions in the third direction become smaller as the distance from the first regions 203a, 213a, 303a, 313a increases. Including 203b, 213b, 303b, 313b, first-class In each of the road Ra and the second flow path Rb, the distribution resistance in the range corresponding to the first region 203a, 213a, 303a, 313a is higher than the distribution resistance in the range corresponding to the second region 203b, 213b, 303b, 313b. Is large, and the distribution resistance in the range corresponding to the main heat transfer regions 202, 212, 302, 312 is larger than the distribution resistance in the range corresponding to the first regions 203a, 213a, 303a, 313a. To.

According to the above configuration, the first fluid A flowing into the first flow path Ra from one of the first series passages Ra preferentially circulates in the range corresponding to the second regions 203b and 303b having a small flow resistance, and the second It extends to the entire range or substantially the entire range corresponding to the regions 203b and 303b. Then, the first fluid A is less likely to enter the first regions 203a and 303a by the shortest route due to the flow resistance of the first regions 203a and 303a, so that the subsequent first fluid A spreads in the second direction. As a result of passing through another route having a longer distance than the shortest route, the range corresponding to the second regions 203b and 303b in the first flow path Ra is filled, and the entire range corresponding to the first regions 203a and 303a or abbreviated. It flows into the whole area.

Even if the first fluid A passing through the shortest route precedes the first fluid A passing through another route having a longer distance than the shortest route, it is distributed within the range corresponding to the main heat transfer regions 202 and 302. The first fluid A, which has reached the range corresponding to the main heat transfer regions 202 and 302 in advance due to the resistance, receives the flow resistance in the main heat transfer regions 202 and 302 of the first flow path Ra and passes through the shortest route as it is. Therefore, it becomes difficult for the fluid to flow into the range corresponding to the main heat transfer regions 202 and 302.

As a result, the first fluid A passing through another route having a longer distance than the shortest route has caught up with or has almost caught up with the first fluid A passing through the shortest route, and the first region in the first flow path Ra. The first fluid A in the range corresponding to 203a and 303a enters in a balanced state with respect to the entire range or substantially the entire range corresponding to the main heat transfer regions 202 and 302, and enters the main heat transfer regions 202 and 302 in a balanced state. It circulates in the second direction in the range corresponding to the above, and flows out to the other first series passage Ra2 through the range corresponding to the other sub-heat transfer regions 203 and 303.

Further, the second fluid B flowing into the second flow path Rb from one of the second continuous passages Rb1 preferentially flows in the range corresponding to the second regions 213b and 313b having a small flow resistance, and the second region 213b, It extends to the entire range or substantially the entire range corresponding to 313b. Then, the second fluid B is less likely to enter the first region 213a, 313a by the shortest route due to the flow resistance of the first region 213a, 313a, so that the subsequent second fluid B spreads in the second direction. As a result of passing through another route having a longer distance than the shortest route, the range corresponding to the second regions 213b and 313b in the second flow path Rb is filled, and the entire range corresponding to the first regions 213a and 313a or the entire range or It flows into almost the entire area.

Then, even if the second fluid B passing through the shortest route precedes the second fluid B passing through another route having a longer distance than the shortest route, it is distributed within the range corresponding to the main heat transfer regions 212 and 312. The second fluid B, which has reached the range corresponding to the main heat transfer regions 212 and 312 in advance due to the resistance, receives the flow resistance in the main heat transfer regions 212 and 312 of the second flow path Rb and takes the shortest route as it is. It becomes difficult to pass through and flow into the main heat transfer regions 212 and 312.

As a result, the second fluid B passing through another route having a longer distance than the shortest route has caught up with or has almost caught up with the second fluid B passing through the shortest route, and the first in the second flow path Rb. The second fluid B in the range corresponding to the regions 213a and 313a enters in a balanced state with respect to the entire range or substantially the entire range corresponding to the main heat transfer regions 212 and 312, and the main heat transfer regions 212, It circulates in the second direction in the range corresponding to 312, and flows out to the other second communication passage Rb2 through the range corresponding to the other sub-heat transfer regions 213 and 313.

As a result, in the plate heat exchanger 1 according to the present embodiment, the heat exchange efficiency can be improved in the range where the flow path width is maximum (the range corresponding to the main heat transfer regions 202, 212, 302, 312). It can have an excellent effect of being able to do it.

In the present embodiment, the heat transfer regions 200 and 300 of the first flow path demarcation regions 20 and 30 have a plurality of recesses 204a, 205a, 206a, 304a, 305a, 306a and protrusions 204b, 205b, 206b, 304b, 305b, Along with the formation of 306b, the heat transfer regions 210 and 310 of the second flow path demarcation areas 21 and 31 have recesses 204a, 205a, 206a and 304a of the heat transfer areas 200 and 300 in the first flow path demarcation areas 20 and 30. , 305a, 306a and the convex portions 214b, 215b, 216b, 314b, 315b, 316b and the convex portions 204b, 205b, 206b, 304b of the heat transfer regions 200, 300 in the first flow path demarcation regions 20, 30. Recesses 214a, 215a, 216a, 314a, 315a, 316a, which are in a front-to-back relationship with 305b and 306b, are formed, and heat transfer regions 200 of the first flow path demarcation areas 20 and 30 and the second flow path demarcation areas 21 and 31 are formed. , 210, 300, 310, concave portions 204a, 205a, 206a, 214a, 215a, 216a, 304a, 305a, 306a, 314a, 315a, 316a and convex portions 204b, 205b, 206b, 214b, 215b, 216b, 304b, 305b. , 306b, 314b, 315b, 316b are alternately arranged in a predetermined direction, and the convex portions 205b, 215b, 305b adjacent to each other with the recesses 205a, 215a, 305a, 315a in the second regions 203b, 213b, 303b, 313b interposed therebetween. , 315b are wider than the distance between the convex portions 204b, 214b, 304b, 314b adjacent to each other with the recesses 204a, 214a, 304a, 314a in the first region 203a, 213a, 303a, 313a sandwiched between the concave portions 204a, 214a, 304a, 314a. The distance between the convex portions 204b, 214b, 304b, 314b adjacent to each other across the recesses 204a, 214a, 304a, 314a in the regions 203a, 213a, 303a, 313a is within the main heat transfer regions 202, 212, 302, 312. It is set wider than the distance between the convex portions 206b, 216b, 306b, and 316b adjacent to each other with the concave portions 206a, 216a, 306a, and 316a interposed therebetween.

As a result, in each of the first flow path Ra and the second flow path Rb, the main heat transfer regions 202, 212, 302, 312 and the sub heat transfer regions 203, 213, 303, 313 (first region 203a, 213a, 303a, Convex lines 204b, 205b, 206b, 214b, 215b, 216b, 304b, 305b, 306b, 314b, 315b, 316b with respect to the respective regions of 313a and the second regions 203b, 213b, 303b, 313b). It is possible to impart a distribution resistance corresponding to the interval of.

In particular, in the present embodiment, the main heat transfer regions 202, 212, 302, 312, the first regions 203a, 213a, 303a, 313a of the sub heat transfer regions 203, 213, 303, 313, and the sub heat transfer regions 203, 213. , 303, 313, second regions 203b, 213b, 303b, 313b, recesses 204a, 205a, 206a, 214a, 215a, 216a, 304a, 305a, 306a, 314a, 315a, 316a and convex portions 204b, 205b, 206b, 214b, 215b, 216b, 304b, 305b, 306b, 314b, 315b, 316b are the recesses 204a, 205a, 206a, 214a, 215a, 216a, 304a, 305a, 306a, 314a, 315a, 316a and the protrusions 204b, 205b, 206b, 214b, 215b, 216b, 304b, 305b, 306b, 314b, 315b, 316b are concave and convex extending in a direction orthogonal to a predetermined direction in which they are alternately arranged, and adjacent heat transfer plates 2, 3 Since the ridges 204b, 205b, 206b, 214b, 215b, 216b, 304b, 305b, 306b, 314b, 315b, 316b in each region of the above intersect and collide with each other, the first fluid A in the first flow path Ra As the flow is disturbed, the flow of the second fluid B is disturbed in the second flow path Rb. As a result, the heat exchange efficiency between the first fluid A and the second fluid B is enhanced.

In the present embodiment, the pair of first through holes 22, 32 and the pair of second through holes 23, 33 are arranged at intervals in the third direction, and the second regions 203b, 213b, 303b, 313b are formed. The first through holes 203a, 213a, 303a, 313a are arranged between the first through holes 22, 32 adjacent to each other in the third direction and the second through holes 23, 33, and the first through holes 203a, 213a, 303a, 313a are adjacent to each other in the third direction. It is arranged between 22, 32 and the second through holes 23, 33 and the main heat transfer regions 202, 212, 302, 312.

According to such a configuration, the first fluid A flowing into the first flow path Ra from the first through holes 22 and 32 (first series passage Ra1) is transferred to the second regions 203b and 303b which are upstream regions in the first flow path Ra. The first fluid A can be circulated not only to the shortest route but also to another route having a longer distance than the shortest route. As a result, the first fluid A can be filled in the range corresponding to the second regions 203b and 303b in the first flow path Ra, and the first fluid A can be circulated to the downstream side. Further, the second fluid B flowing into the second flow path Rb from the second through holes 23, 33 (second continuous passage Rb1) is directed toward the second regions 213b and 313b, which are upstream regions in the second flow path Rb. The second fluid B can be circulated preferentially, and the second fluid B can be circulated not only to the shortest route but also to another route having a longer distance than the shortest route. As a result, the second fluid B can be filled in the range of the second regions 213b and 313b in the second flow path Rb, and the second fluid B can be circulated to the downstream side.

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

In the above embodiment, the plurality of heat transfer plates 2, 3 have concave portions 204a, 205a, 206a, 214a, 215a, 216a, 304a, 305a, 306a, 314a, 315a, 316a and convex portions 204b, 205b, 206b, 214b, Two types of heat transfer plates 2, 3 (first heat transfer plate 2 and second heat transfer plate 3) having different forms (tilt angles) of 215b, 216b, 304b, 305b, 306b, 314b, 315b, 316b Included, but not limited to this. For example, the plurality of heat transfer plates 2, 3 are the same (concave lines 204a, 205a, 206a, 214a, 215a, 216a, 304a, 305a, 306a, 314a, 315a, 316a and convex lines 204b, 205b, 206b, The forms (inclination angles) of 214b, 215b, 216b, 304b, 305b, 306b, 314b, 315b, and 316b may be the same).

In the above embodiment, the main heat transfer regions 202, 212, 302, 312 and the sub heat transfer regions 203, 213, 303, which are included in the first flow path demarcation areas 20 and 30 and the second flow path demarcation areas 21 and 31, respectively. Recesses 204a, 205a, 206a, 214a, 215a, 216a, 304a, 305a, 306a, 314a, 315a, respectively of the first region 203a, 213a, 303a, 313a and the second region 203b, 213b, 303b, 313b of 313, respectively. The 316a and the convex portions 204b, 205b, 206b, 214b, 215b, 216b, 304b, 305b, 306b, 314b, 315b, 316b are defined as concave and convex extending in a predetermined direction, but the present invention is not limited thereto. At least one of the first regions 203a, 213a, 303a, 313a of the main heat transfer regions 202, 212, 302, 312, the sub heat transfer regions 203, 213, 303, 313, and the second regions 203b, 213b, 303b, 313b. Recesses 204a, 205a, 206a, 214a, 215a, 216a, 304a, 305a, 306a, 314a, 315a, 316a and protrusions 204b, 205b, 206b, 214b, 215b, 216b, 304b, 305b, 306b, 314b in one area. , 315b, 316b may be concave and convex extending in a predetermined direction.

That is, any of the main heat transfer regions 202, 212, 302, 312, the first regions 203a, 213a, 303a, 313a of the sub heat transfer regions 203, 213, 303, 313, and the second regions 203b, 213b, 303b, 313b. The recesses 204a, 205a, 206a, 214a, 215a, 216a, 304a, 305a, 306a, 314a, 315a, 316a and the protrusions 204b, 205b, 206b, 214b, 215b, 216b, 304b, 305b, 306b, 314b, 315b. , 316b may be recesses and protrusions having no length in a predetermined direction (not extending in a predetermined direction), main heat transfer regions 202, 212, 302, 312, sub heat transfer regions 203, 213. , 303, 313 first regions 203a, 213a, 303a, 313a, and second regions 203b, 213b, 303b, 313b, respectively, recesses 204a, 205a, 206a, 214a, 215a, 216a, 304a, 305a, 306a, 314a. , 315a, 316a and convex portions 204b, 205b, 206b, 214b, 215b, 216b, 304b, 305b, 306b, 314b, 315b, 316b do not have a length in a predetermined direction (do not extend in a predetermined direction). And may be protrusions.

In any of these cases, in each of the first flow path Ra and the second flow path Rb, as in the above embodiment, in order to make the flow resistance in the range corresponding to each region different, the second region 203b, The distance between the convex portions 205b, 215b, 305b, 315b adjacent to each other across the concave portions 205a, 215a, 305a, 315a in the recesses 205a, 303b, 313b is the recesses 204a, 214a in the first region 203a, 213a, 303a, 313a. , 304a, 314a are wider than the distance between the convex portions 204b, 214b, 304b, 314b adjacent to each other, and the concave portions 204a, 214a, 304a, 314a in the first regions 203a, 213a, 303a, 313a are adjacent to each other. The distance between the convex portions 204b, 214b, 304b, 314b is adjacent to each other with the concave portions 206a, 216a, 306a, 316a in the main heat transfer regions 202, 212, 302, 312 sandwiched between the convex portions 206b, 216b, 306b, 316b. Of course, it is set wider than the distance between them.

In the above embodiment, in order to make the flow resistance in the range corresponding to each region different in each of the first flow path Ra and the second flow path Rb, the heat transfer regions 200, 210, 300 of the heat transfer plates 2 and 3 are used. , 310, main heat transfer regions 202, 212, 302, 312, sub heat transfer regions 203, 213, 303, 313 (first region 203a, 213a, 303a, 313a, second region 203b, 213b, 303b, 313b). ) Into a plurality of recesses (concave) 204a, 205a, 206a, 214a, 215a, 216a, 304a, 305a, 306a, 314a, 315a, 316a and a plurality of protrusions (convex) 204b, 205b, 206b, 214b, 215b. , 216b, 304b, 305b, 306b, 314b, 315b, 316b were formed, but not limited to this. For example, the spacing between the regions of the adjacent heat transfer plates 2 and 3 (the spacing between the main heat transfer regions 202, 212, 302, 312, the spacing between the first regions 203a, 213a, 303a, 313a, the second region 203b). , 213b, 303b, 313b) may be different, and the flow resistance in the range corresponding to each region may be different in each of the first flow path Ra and the second flow path Rb. Further, a resistance member that imparts fluid flow resistance may be arranged between the regions.

In the above embodiment, a pair of first series passages Ra1 and Ra2 are formed on one end side in the third direction, and a pair of second series passages Rb1 and Rb2 are formed on the other end side in the third direction. The flow of the fluid (first fluid A, second fluid B) is trapezoidal in each of the path Ra and the second flow path Rb, but the flow is not limited to this. For example, a pair of first through holes 22 and 32 (through holes serving as the first series passages Ra1 and Ra2) are formed at diagonal positions of the square heat transfer plates 2 and 3, and the heat transfer plates 2 and 3 are formed. By forming a pair of second through holes 23, 33 (through holes that form the second continuous passages Rb1 and Rb2) at different diagonal positions, the fluid (first) is formed in each of the first flow path Ra and the second flow path Rb. The flow of the fluid A and the second fluid B) may be oblique alternating current.

In the above embodiment, by arranging the gasket 4 between the adjacent heat transfer plates 2 and 3, the heat transfer plates 2 and 3 are sealed, and the first flow path Ra, the second flow path Rb, and the first series passage are sealed. Ra1, Ra2, and the second communication passages Rb1 and Rb2 are formed, but the present invention is not limited thereto. For example, the adjacent heat transfer plates 2 and 3 are sealed by brazing or welding to form the first flow path Ra, the second flow path Rb, the first series passages Ra1 and Ra2, and the second series passages Rb1 and Rb2. You may.

In the above embodiment, the pair of first through holes 22, 32 and the pair of second through holes 23, 33 are arranged at intervals in the third direction, and the subheat transfer regions 203, 213, 303, 313 are arranged between them. The second regions 203b, 213b, 303b, 313b of the above are arranged, but the present invention is not limited to this. For example, when the pair of first through holes 22, 32 and the pair of second through holes 23, 33 are closely spaced in the third direction, the entire sub-heat transfer regions 203, 213, 303, 313 (first region). 203a, 213a, 303a, 313a and the second regions 203b, 213b, 303b, 313b) are arranged in the third direction with respect to the first through holes 22, 32 and the second through holes 23, 33. It may be arranged.

1 ... Plate type heat exchanger, 2 ... First heat transfer plate (heat transfer plate), 3 ... Second heat transfer plate (heat transfer plate), 4 ... Gasket, 4a ... First gasket, 4b ... Second gasket, 4c ... Third gasket, 4d ... Fourth gasket, 5, 6 ... End plate, 20, 30 ... First flow path demarcation area, 21, 31 ... Second flow path demarcation area, 22, 32 ... First through hole, 23 , 33 ... 2nd through hole, 24,34 ... 1st seal planned area, 25,35 ... 2nd seal planned area, 26,36 ... 3rd seal planned area, 27,37 ... 4th sealed planned area, 50 ... Plate body, 51 ... Nozzle, 200, 210, 300, 310 ... Heat transfer region, 201, 301 ... First through hole forming region, 202, 212, 302, 312 ... Main heat transfer region, 203, 213, 303, 313 ... Secondary heat transfer region, 203a, 213a, 303a, 313a ... First region, 203b, 213b, 303b, 313b ... Second region, 204a, 205a, 206a, 214a, 215a, 216a, 304a, 305a, 306a, 314a, 315a, 316a ... Concave (concave), 204b, 205b, 206b, 214b, 215b, 216b, 304b, 305b, 306b, 314b, 315b, 316b ... Convex (convex), 211, 311 ... Second through hole formation Region, A ... first fluid, B ... second fluid, CL1 ... vertical center line, CL2 ... horizontal center line, Ra ... first flow path, Ra1, Ra2 ... first series passage, Rb ... second flow path, Rb1, Rb2 ... 2nd passage, Sa ... 1st surface, Sb ... 2nd surface

Claims (4)

Equipped with multiple heat transfer plates stacked in the first direction
Each of the multiple heat transfer plates
A first surface containing a first flow path defining region that defines the first flow path through which the first fluid flows, and
It has a second surface opposite to the first surface, and has a second surface including a second flow path defining region that defines the second flow path through which the second fluid flows, and also has a second surface.
Each is a pair of first through holes that penetrate the first direction within the first flow path demarcation region and are spaced apart in the second direction that is orthogonal to the first direction, each extending in the first direction. A pair of first through holes forming a first series of passages communicating only with the first flow path,
Each is a pair of second through holes that penetrate in the first direction and are spaced apart in the second direction within the second flow path demarcation region, each extending in the first direction and the second flow path. It has a pair of second through holes that form a second passage that communicates only with
The first flow path demarcation region and the second flow path demarcation region are heat transfer regions that exchange heat between the first fluid and the second fluid, and include heat transfer regions that overlap each other in the first direction.
The heat transfer area is
The main heat transfer region including the intersection of the vertical center line extending in the second direction of the heat transfer plate and the horizontal center line extending in the first direction and the third direction orthogonal to the second direction,
A pair of sub-heat transfer regions sandwiching the main heat transfer region in the second direction, including a pair of sub-heat transfer regions whose dimensions in the third direction decrease as the distance from the main heat transfer region increases.
Each of the pair of secondary heat transfer areas
The first region, which connects to the main heat transfer region in the second direction,
A second region connected to the first region in the second direction, including a second region in which the dimension in the third direction becomes smaller as the distance from the first region increases.
In the first area
Concavo-convex rows in which concave and convex stripes are arranged alternately extend in the third direction,
Each of the concave and convex stripes constituting the uneven row extends in a direction intersecting with each of the second direction and the third direction.
In the uneven row, the concave and convex stripes adjacent to each other are parallel to each other.
In the second area
Concavo-convex rows in which concave and convex stripes are arranged alternately extend in the third direction,
Each of the concave and convex stripes constituting the uneven row extends in a direction intersecting with each of the second direction and the third direction.
In the uneven row, the concave and convex stripes adjacent to each other are parallel to each other.
In each of the first flow path and the second flow path, the distribution resistance in the range corresponding to the first region is larger than the distribution resistance in the range corresponding to the second region, and the distribution in the range corresponding to the first region. A plate-type heat exchanger characterized in that the distribution resistance in the range corresponding to the main heat transfer region is larger than the resistance. A plurality of recesses and ridges are formed in the heat transfer region of the first flow path demarcation region, and the heat transfer region of the second flow path demarcation region has the recesses of the heat transfer region in the first flow path demarcation region. The ridges on the front and back and the ridges in the heat transfer region in the first flow path demarcation area are formed, and the heat transfer in the first flow path demarcation area and the second flow path demarcation area is formed. In the region, the concaves and convexes are alternately arranged in a predetermined direction, and the plurality of concaves and the plurality of convexes in these heat transfer regions are the plurality of concaves and the plurality of convexes formed in the first region. Concavities in the second region, including strips , a plurality of ridges and ridges formed in the second region, and a plurality of ridges and ridges formed in the main heat transfer region. The distance between adjacent ridges sandwiching the However, the plate-type heat exchanger according to claim 1, wherein the distance between the ridges adjacent to each other across the concave ridges in the main heat transfer region is set wider than the distance between the ridges. Concavities and ridges in at least one of the main heat transfer region, the first region of the sub heat transfer region, and the second region of the sub heat transfer region have the dents and the ridges alternately. The plate heat exchanger according to claim 2, wherein the ridges extending in a direction orthogonal to a predetermined direction in which they are lined up and having protrusions in any one of the adjacent heat transfer plates intersect with each other. The pair of first through holes and the pair of second through holes are arranged at intervals in the third direction, and the second region is located between the first through holes and the second through holes adjacent to each other in the third direction. The plate according to any one of claims 1 to 3, wherein the first region is arranged between the first through hole and the second through hole adjacent to each other in the third direction and the main heat transfer region. Type heat exchanger.

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