Plate heat exchanger

Abstract

The plate heat exchanger comprises a first plate piece and a second plate piece, the first plate piece comprises a first base body and a first separation rib protruding out of the first base body, the first plate piece comprises a first flow blocking piece protruding out of the first base body, and the second plate piece comprises a second separation rib protruding out of the second base body. The first flow blocking piece is located on one side of the first separation rib, the end, where the first corner hole is located, of the first base body is defined as a first end in the length direction of the first base body, and the first flow blocking piece comprises a first flow blocking wall part and a second flow blocking wall part; the whole first flow blocking wall part extends in the direction away from the first end part and away from the first separation rib at the same time, and the whole second flow blocking wall part extends in the direction away from the first end part and close to the first separation rib at the same time. According to the plate heat exchanger, forward or reverse fluid can be distributed to flow to the area away from the first separation ribs.

Description

Technical Field

[0001] The invention relates to the technical field of heat exchange, and in particular to a plate heat exchanger. Background Art

[0002] Plate heat exchanger is a highly efficient and compact heat exchanger widely used in air conditioning, new energy vehicles and other industries. In the related technology, the fluid enters the plate heat exchanger and flows through its heat exchange area to exchange heat. The corners of the plate heat exchanger generally have corner holes for the fluid to flow in or out. The fluid enters the plate from one corner hole and leaves from another corner hole. There is a separator in the middle area of ​​the plate, which is located between the two corner holes. When the fluid flows on the plate, there is a lot of fluid flowing along the side wall of the separator. The flow path of this part of the fluid is short and the heat exchange efficiency is low.

[0003] In the related art, in order to reasonably divert the fluid flowing along the side wall of the dividing strip to flow in the edge area of ​​the plate, a drainage structure is set on the plate. However, this method in the related art is only applicable to guiding unidirectional flow of fluid, and has the opposite effect when the fluid flows in the opposite direction. Summary of the invention

[0004] The purpose of the present invention is to at least solve the problems in the background technology and to provide a plate heat exchanger.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A plate heat exchanger, comprising a first plate and a second plate, the plate heat exchanger having at least a first heat exchange channel, the first heat exchange channel being located between the first plate and the second plate, the first plate comprising a first substrate and a first dividing rib protruding from the first substrate, the first substrate having a first corner hole and a second corner hole, at least a portion of the first dividing rib being located between the first corner hole and the second corner hole;

[0007] The first plate includes a first baffle protruding from the first substrate, the first baffle is located on one side of the first dividing rib, and along the length direction of the first substrate, the end of one end of the first substrate where the first corner hole is located is defined as the first end, the first baffle includes a first baffle wall portion and a second baffle wall portion, the first baffle wall portion extends as a whole in a direction away from the first end and at the same time away from the first dividing rib, and the second baffle wall portion extends as a whole in a direction away from the first end and at the same time close to the first dividing rib.

[0008] In the plate heat exchanger of the above technical solution, the first baffle includes a first baffle wall portion and a second baffle wall portion. When the fluid flowing through the plate heat exchanger flows in the forward direction, one of the first baffle wall portion and the second baffle wall portion can guide the fluid to flow to an area away from the first dividing rib, thereby increasing the fluid flow rate in the area with a long flow path in the plate heat exchanger and improving the overall heat exchange efficiency of the plate heat exchanger; when the fluid flowing through the plate heat exchanger flows in the reverse direction, the other of the first baffle wall portion and the second baffle wall portion can guide the fluid to flow to an area away from the first dividing rib, thereby improving the overall heat exchange efficiency of the plate heat exchanger.

[0009] Furthermore, the plate heat exchanger of the above technical solution can be used for both forward and reverse flow fluid states, so that the fluid flowing through the plate heat exchanger in the forward or reverse direction can be distributed to flow to the area away from the first dividing rib, that is, the fluid flow in the area with a long flow path in the plate heat exchanger is increased, thereby improving the overall heat exchange efficiency of the plate heat exchanger.

[0010] The features and advantages of the present invention will be disclosed in detail in the following specific embodiments and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments:

[0012] Figure 1 A schematic diagram of an explosion structure of a plate heat exchanger according to an embodiment;

[0013] Figure 2 is a schematic structural diagram of a first plate of an embodiment;

[0014] Figure 3 for Figure 2 A schematic diagram of the enlarged structure at A in the middle;

[0015] Figure 4 A structural schematic diagram showing the protruding direction of the first protrusion;

[0016] Figure 5 for Figure 2 A schematic diagram of the enlarged structure at B in the middle;

[0017] Figure 6 A schematic structural diagram of a first plate in another embodiment;

[0018] Figure 7 A schematic structural diagram of a first plate in another embodiment;

[0019] Figure 8 A schematic structural diagram of a first plate in another embodiment;

[0020] Fig. 9 is a schematic cross-sectional structure diagram of a plate heat exchanger according to an embodiment;

[0021] Fig.10 The diagram is a schematic diagram of the explosion structure of a plate heat exchanger according to another embodiment.

[0022] Reference numerals:

[0023] 1. First plate, 100. First substrate, 101. First dividing rib, 1011. First blocking section, 1012. First flow guide section, 10121. First convex portion, 10122. First concave portion, 10123. Second convex portion, 10124. Second concave portion, 102. First angular hole, 103. Second angular hole, 104. First flow blocker, 1041. First flow blocker wall portion, 1042. Second flow blocker wall portion, 105. First spacing, 106. Second spacing, 107. Second flow blocker, 1071. First three baffle walls, 1072, fourth baffle walls, 108, first spoiler area, 109, second spoiler area, 110, spoiler protrusions, 111, connecting channels, 112, third corner holes, 113, fourth corner holes, 114, first end portions, 115, second end portions, 2, second plates, 200, second substrates, 201, second dividing ribs, 2011, second blocking sections, 2012, second flow guide sections, 202, third baffles, 203, fourth baffles, 3, first heat exchange channels, 4, second heat exchange channels. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Other embodiments obtained by technical personnel in the field without creative work all belong to the protection scope of the present invention. In addition, it should be understood that the following words indicating orientation or position relationship such as "up", "down", "left", "right", "longitudinal", "lateral", "inside", "outside", "vertical", "horizontal", "top", "bottom", etc. are only based on the orientation or position relationship shown in the drawings, only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device / element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0025] like Figure 1-Figure 10 As shown, a plate heat exchanger of this embodiment includes a first plate 1 and a second plate 2. The plate heat exchanger has at least a first heat exchange channel 3, and the first heat exchange channel 3 is located between the first plate 1 and the second plate 2. The first plate 1 includes a first base 100 and a first dividing rib 101 protruding from the first base 100. The first base 100 has a first corner hole 102 and a second corner hole 103. At least a portion of the first dividing rib 101 is located between the first corner hole 102 and the second corner hole 103.

[0026] The first plate 1 includes a first baffle 104 protruding from the first substrate 100. The first baffle 104 is located on one side of the first dividing rib 101. Along the length direction of the first substrate 100, the end of one end of the first substrate 100 where the first corner hole 102 is located is defined as the first end 114. The first baffle 104 includes a first baffle wall portion 1041 and a second baffle wall portion 1042. The first baffle wall portion 1041 extends as a whole in a direction away from the first end 114 and at the same time away from the first dividing rib 101. The second baffle wall portion 1042 extends as a whole in a direction away from the first end 114 and at the same time close to the first dividing rib 101.

[0027] In one embodiment, the first dividing rib 101 is located in the middle area of ​​the first substrate 100, and the path of the fluid flowing along the area close to the first dividing rib 101 is shorter than the path of the fluid flowing along the area away from the first dividing rib 101. When other conditions are the same, the longer the fluid flow path of the plate heat exchanger, the better the heat exchange efficiency of the plate heat exchanger. In one embodiment, the width direction of the first substrate 100 is parallel to the first end 114; the length direction of the first substrate 100 is parallel to the end of the first substrate 100 adjacent to the first end 114.

[0028] The first baffle wall portion 1041 extends as a whole in a direction away from the first end portion 114 and away from the first dividing rib 101. It can be understood that the first baffle wall portion 1041 has a first baffle end portion and a second baffle end portion, and the first baffle end portion is closer to the first end portion 114 and the first dividing rib 101 than the second baffle end portion. It should be noted that the first dividing rib 101 can be strip-shaped or have a bending section. When the first dividing rib 101 has a bending section, the first dividing rib 101 as a whole should be used as a reference object for moving away from or approaching the first baffle wall portion 1041 or its regular center line should be used as a reference object, and only a part of the first dividing rib 101 should not be used as a reference object for moving away from or approaching the first baffle wall portion 1041.

[0029] When the fluid flowing through the plate heat exchanger flows forward, one of the first baffle wall portion 1041 and the second baffle wall portion 1042 can guide the fluid to flow to an area away from the first dividing rib 101, thereby increasing the fluid flow in the area with a long flow path in the plate heat exchanger and improving the overall heat exchange efficiency of the plate heat exchanger; when the fluid flowing through the plate heat exchanger flows reversely, the other of the first baffle wall portion 1041 and the second baffle wall portion 1042 can guide the fluid to flow to an area away from the first dividing rib 101, thereby improving the overall heat exchange efficiency of the plate heat exchanger.

[0030] like Figure 3As shown, most of the fluid in the area close to the first dividing rib 101 flows to the area away from the first dividing rib 101 under the guidance of the first baffle wall 104, and a small part of the fluid flows through the area between the first baffle 104 and the first dividing rib 101, thereby effectively distributing the fluid, increasing the fluid flow in the area with a long flow path in the plate heat exchanger, and improving the overall heat exchange efficiency of the plate heat exchanger.

[0031] like Figure 1 , 2 As shown, along the length direction of the first substrate 100, the end of the first substrate 100 where the first corner hole 102 is located is defined as the first end 114, the other end of the first substrate 100 relative to the first end 114 is defined as the second end 115, the direction from the first end 114 to the second end 115 is defined as the first direction, and the direction from the second end 115 to the first end 114 is defined as the second direction.

[0032] The first flow-blocking wall portion 1041 extends as a whole in a direction away from the first end portion 114 and at the same time away from the first dividing rib 101, that is, in the first direction, the first flow-blocking wall portion 1041 is inclined in a direction away from the first dividing rib 101, and when the first angular hole 102 is used as a fluid inlet hole, the fluid will be guided by the first flow-blocking wall portion 1041 to flow away from the first dividing rib 101 when flowing through the first flow-blocking wall portion 1041; the second flow-blocking wall portion 1042 extends as a whole in a direction away from the first end portion 114 and at the same time close to the first dividing rib 101, that is, in the first direction, the second flow-blocking wall extends in a direction close to the first dividing rib 101 (in the second direction, the second flow-blocking rib extends in a direction away from the first dividing rib 101), and when the first angular hole 102 is used as a fluid outlet hole, the fluid will be guided by the second flow-blocking wall portion 1042 to flow away from the first dividing rib 101 when flowing through the second flow-blocking wall portion 1042.

[0033] In one embodiment, the plate heat exchanger includes a first fluid channel and a second fluid channel, the first fluid channel and the second fluid channel are not connected, and a plurality of first plates 1 and second plates 2 stacked in sequence form the first fluid channel and the second fluid channel in sequence, so that the fluid in the first fluid channel can exchange heat with the fluid in the second fluid channel.

[0034] like Fig. 9 As shown, the first fluid channel at least includes a first heat exchange channel 3 located between the first plate 1 and the second plate 2, and a hole channel formed by aligning the corner holes communicating with the first heat exchange channel 3. The second fluid channel at least includes a second heat exchange channel 4 located between the first plate 1 and the second plate 2, and a hole channel formed by aligning the corner holes communicating with the second heat exchange channel 4.

[0035] In another embodiment, Fig.10As shown, the first plate 1 or the second plate 2 is in contact with an external heat source or cold source, and when the fluid flows through the first heat exchange channel 3 between the first plate 1 and the second plate 2, heat can be exchanged with the external heat source or cold source, so the plate heat exchanger only needs to have a first fluid channel.

[0036] In one embodiment, Figure 2-Figure 5 As shown, the first spoiler wall portion 1041 and the second spoiler wall portion 1042 are two side wall portions of the first spoiler 104. Specifically, the first spoiler 104 is in a triangular shape as a whole, and the two side wall portions of the triangular first spoiler 104 are the first spoiler wall portion 1041 and the second spoiler wall portion 1042 respectively.

[0037] Furthermore, there is a first spacing 105 between the triangular-shaped first baffle 104 and the first dividing rib 101. The first spacing 105 is located between the bottom wall portion of the triangular first baffle 104 and the first dividing rib 101. The first spacing 105 serves as a flow guide channel for a smaller amount of fluid to flow through. The area with a shorter flow path close to the first dividing rib 101 can meet the heat exchange efficiency of the small amount of fluid in this part, thereby reasonably allocating the fluid flow to different areas.

[0038] In one embodiment, Figure 6 As shown, the first flow spoiler 104 is in a quadrilateral shape as a whole, the first flow spoiler wall portion 1041 and the second flow spoiler wall portion 1042 are two side wall portions of the first flow spoiler 104 in a quadrilateral shape, the first flow spoiler 104 includes a third side wall portion and a fourth side wall portion facing the first dividing rib 101, and a second spacing 106 is provided between the continuous wall portion formed by the third side wall portion and the fourth side wall portion and the first dividing rib 101. Specifically, the first flow spoiler 104 can be in a trapezoidal or prismatic shape as a whole, and of course, in other embodiments, the first flow spoiler 104 can also be in other polygonal shapes or irregular shapes as a whole, and only needs to have the first flow spoiler wall portion 1041 and the second flow spoiler wall portion 1042.

[0039] In one embodiment, Figure 7 As shown, the first flow blocking wall portion 1041 and the second flow blocking wall portion 1042 are two inclined ribs respectively, and the first flow blocking wall portion 1041 and the second flow blocking wall portion 1042 can be separated or connected.

[0040] In one embodiment, Figure 2-Figure 5As shown, the first plate 1 includes a second baffle 107 protruding from the first substrate 100, and the second baffle 107 and the first baffle 104 are respectively located on both sides of the first dividing rib 101, and the second baffle 107 includes a third baffle wall portion 1071 and a fourth baffle wall portion 1072. The third baffle wall portion 1071 extends as a whole in a direction away from the first end portion 114 and at the same time away from the first dividing rib 101, and the fourth baffle wall portion 1072 extends as a whole in a direction away from the first end portion 114 and at the same time close to the first dividing rib 101.

[0041] The first baffle 104 and the second baffle 107 guide the areas on both sides of the first dividing rib 101 respectively, and most of the fluid can be guided to the edge area of ​​the first substrate 100 when flowing through the two areas, thereby increasing the fluid flow in the area with a long flow path in the plate heat exchanger and increasing the heat exchange efficiency of the plate heat exchanger.

[0042] In one embodiment, the second spoiler 107 is in a triangular or quadrilateral shape as a whole. Further, the second spoiler 107 is in a mirror symmetric shape with the first spoiler 104 as a whole. In other embodiments, the second spoiler 107 may be different from the first spoiler 104 as a whole, such as the first spoiler 104 is in a triangular shape as a whole, while the second spoiler 107 is in a quadrilateral shape as a whole.

[0043] In one embodiment, the first dividing rib 101 has at least two first protrusions 10121 protruding along the width direction of the first substrate 101, the first flow-aiding member 104 and the first protrusion 10121 are located on the same side of the first dividing rib 101, and at least part of the first flow-aiding member 104 is located between the two first protrusions 10121. The first protrusion 10121 increases the flow disturbance effect of the first dividing rib 101, and the first protrusion 10121 cooperates with the first flow-aiding member 104 to make the fluid flow more smoothly from the area close to the first dividing rib 101 to the area far from the first dividing rib 101, thereby further increasing the fluid flow in the area with a long flow path and improving the overall heat exchange efficiency of the plate heat exchanger.

[0044] Further, the first dividing rib 101 includes a first flow guide section 1012, the first flow guide section 1012 includes alternately arranged first convex portions 10121 and first concave portions 10122, the first convex portions 10121 and the first concave portions 10122 are directly or indirectly connected, and at least a portion of the first flow blocker 104 is located between two adjacent first convex portions 10121. The first convex portions 10121 and the first concave portions 10122 allow part of the fluid to flow in a curved manner, and compared with the fluid flowing in a straight line, the fluid flowing along the first convex portions 10121 and the first concave portions 10122 has a longer flow path, and its heat exchange efficiency is higher, which further increases the heat exchange efficiency of the plate heat exchanger.

[0045] like Figure 4 As shown, in one embodiment, along the protruding direction of the first protrusion 10121, the highest point of the first protrusion 10121 is not lower than the lowest point of the first flow blocking wall 1041, and the highest point of the first protrusion 10121 is not lower than the lowest point of the second flow blocking wall 1042. Specifically, the first flow blocking wall 1041 has a first flow blocking end and a second flow blocking end, and the first flow blocking end is closer to the first dividing rib 101 than the second flow blocking end; the second flow blocking wall 1042 has a third flow blocking end and a fourth flow blocking end, and the third flow blocking end is closer to the first dividing rib 101 than the fourth flow blocking end. Along the protruding direction of the first protrusion 10121, the highest point of the first protrusion 10121 is not lower than the lowest point of the first flow-blocking end, and is not lower than the lowest point of the third flow-blocking end, so that when the fluid flows along the periphery of the first dividing rib 101, most of the fluid can flow smoothly along the side wall of the first protrusion 10121 through the first flow-blocking wall portion 1041 or the second flow-blocking wall portion 1042, and a small amount of fluid flows through the area between the first flow-blocking component 104 and the first dividing rib 101, thereby increasing the flow path of most of the fluid and increasing the heat exchange efficiency of the plate heat exchanger.

[0046] When the first spoiler 104 is in a triangular shape as a whole, the second spoiler end portion coincides with the fourth spoiler end portion, and along the protruding direction of the first protrusion 10121, the highest point of the first protrusion 10121 is not lower than the height of the bottom end surface of the triangular first spoiler 104. When the first spoiler 104 is in a trapezoidal shape as a whole, the first spoiler wall portion 1041 and the second spoiler wall portion 1042 are respectively two side surfaces of the trapezoidal first spoiler 104, at this time, the second spoiler end portion does not coincide with the fourth spoiler end portion, and along the protruding direction of the first protrusion 10121, the highest point of the first protrusion 10121 is not lower than the height of the bottom end surface of the trapezoidal first spoiler 104. When the first spoiler 104 is in a prismatic shape as a whole, the second spoiler end portion coincides with the fourth spoiler end portion, and along the protruding direction of the first protrusion 10121, the highest point of the first protrusion 10121 is not lower than the height of the diagonal line of the first spoiler 104 passing through the first spoiler end portion and the third spoiler end portion.

[0047] In one embodiment, Figure 5As shown, the first flow guide section 1012 includes second convex portions 10123 and second concave portions 10124 which are alternately arranged, the second concave portion 10124 is located on the back of the first convex portion 10121, the second convex portion 10123 is located on the back of the first concave portion 10122, and at least part of the second flow blocker 107 is located between two adjacent second convex portions 10123. The second convex portion 10123 and the second concave portion 10124 are located on the other side of the first dividing rib 101 relative to the first concave portion 10122 and the first convex portion 10121, and the second convex portion 10123 and the second concave portion 10124 make part of the fluid flow in a curved manner. Compared with the fluid flowing in a straight line, the fluid flowing along the second convex portion 10123 and the second concave portion 10124 has a longer flow path and a higher heat exchange efficiency, which further increases the heat exchange efficiency of the plate heat exchanger. The positional relationship between the second spoiler 107 and the second convex portion 10123 and the second concave portion 10124 refers to the positional relationship between the first spoiler 104 and the first convex portion 10121 and the first concave portion 10122 .

[0048] In one embodiment, the first dividing rib 101 includes a first blocking section 1011, one end of the first blocking section 1011 is connected to the first end 114, and the other end of the first blocking section 1011 is connected to the first guide section 1012. The other end of the first substrate 100 relative to the first end 114 is defined as the second end 115. There is a connecting channel 111 between the first guide section 1012 and the second end 115. Along the thickness direction of the first substrate 100, the height of the first blocking section 1011 is not higher than the height of the first guide section 1012.

[0049] The first blocking section 1011 and the first guide section 1012 are a continuous integrated structure, so that when the fluid flows from the first corner hole 102 to the second corner hole 103 or from the second corner hole 103 to the first corner hole 102, it must pass through the connecting channel 111, so that the overall flow path of the fluid is "U"-shaped, thereby increasing the flow path of the fluid.

[0050] In one embodiment, the first plate 1 and the second plate 2 have the same structure and are stacked head to tail in an opposite manner. The second plate 2 includes a second substrate 200 and a second dividing rib 201 protruding from the second substrate 200, the second plate 2 includes a third flow blocker 202 and a fourth flow blocker 203 protruding from the second substrate 200, the third flow blocker 202 and the fourth flow blocker 203 are respectively located on both sides of the second dividing rib 201, the second dividing rib 201 includes a second blocking section 2011 and a second flow guide section 2012, and the second flow guide section 2012 is stacked with the first flow guide section 1012.

[0051] The bottom width of the first guide section 1012 and the second guide section 2012 is greater than the top width, and the backs of the first guide section 1012 and the second guide section 2012 are hollow, so that the first guide section 1012 and the second guide section 2012 can be stacked.

[0052] In one embodiment, when the first plate 1 and the second plate 2 are stacked head to tail in reverse, the first guide section 1012 and the second guide section 2012 are stacked, and the first guide section 1012 and the second guide section 2012 are wavy as a whole. Along the thickness direction of the first substrate 100, the height of the first barrier section 1011 is lower than the height of the first guide section 1012, and along the thickness direction of the second substrate 200, the height of the second barrier section 2011 is lower than the height of the first guide section 1012. Taking the second plate 2 stacked on the first plate 1 as an example, the first guide section 1012 extends into the back groove of the second guide section 2012 to seal, and the first barrier section 1011 contacts the back of the second substrate 200 to block the flow, so that the fluid on both sides of the first barrier section 1011 is connected through the connecting channel 111, so that the fluid flow path is "U" shaped as a whole. In other embodiments, the first guide section 1012 and the second guide section 2012 can also be long strips as a whole.

[0053] Furthermore, the first plate 1 also has a third triangular hole 112 and a fourth corner hole 113 located at the second end 115, and the four corners of the second plate 2 have four corresponding corner holes, and the four corner holes of the second plate 2 correspond one to one with the four corner holes of the first plate 1. In one embodiment, when the first plate 1 and the second plate 2 are stacked, the two corner holes located at the same end are connected to the first heat exchange channel 3 and blocked from the second heat exchange channel 4, and the two corner holes located at the other end are blocked from the first heat exchange channel 3 and connected to the second heat exchange channel 4. The structure of the four corner holes of the plate has been widely used in plate heat exchangers, and will not be repeated in this application.

[0054] like Fig.10 As shown, in another embodiment, the first plate 1 or the second plate 2 is in contact with an external heat source or a cold source, and when the fluid flows through the first heat exchange channel 3 between the first plate 1 and the second plate 2, heat can be exchanged with the external heat source or the cold source. Therefore, the plate heat exchanger only needs to have a first plate 1, a second plate 2, and a first fluid channel between the first plate 1 and the second plate 2. At this time, the plate heat exchanger only needs to have two corner holes, which serve as an inlet hole and an outlet hole respectively. The first plate 1 and the second plate 2 have different shapes, and the second plate 2 can serve as a cover for the first plate 1.

[0055] like Figure 2As shown, in one embodiment, the first plate 1 has a first spoiler area 108 and a second spoiler area 109 located on both sides of the first dividing rib 101, the first spoiler area 108 and the second spoiler area 109 have spoiler protrusions 110, and the spoiler protrusions 110 protrude from the first substrate 100. The spoiler protrusions 110 of the first spoiler area 108 away from the edge of the first plate 1 are densely distributed than the spoiler protrusions 110 close to the edge of the plate, and the spoiler protrusions 110 of the second spoiler area 109 away from the edge of the first plate 1 are densely distributed than the spoiler protrusions 110 close to the edge of the plate.

[0056] The spoiler bumps 110 of the first spoiler area 108 away from the edge of the plate are densely distributed than the spoiler bumps 110 close to the edge of the first plate 1. Therefore, the flow resistance of the first spoiler area 108 close to the edge of the first plate 1 is smaller; similarly, the spoiler bumps 110 of the second spoiler area 109 away from the edge of the first plate 1 are densely distributed than the spoiler bumps 110 close to the edge of the plate. The flow resistance of the second spoiler area 109 close to the edge of the first plate 1 is smaller. Therefore, relatively more fluid can flow along the area of ​​the edge of the plate, increasing the fluid flow rate in the area with a long flow path in the plate heat exchanger, thereby improving the overall heat exchange efficiency of the plate heat exchanger.

[0057] In one embodiment, the projection of the spoiler protrusion 110 on the plane where the first substrate 100 is located is an ellipse or a circle, that is, the spoiler protrusion 110 has a smooth contact surface for the fluid to contact, which reduces the flow resistance and allows the fluid to flow more smoothly in the plate heat exchanger, reducing the probability of its retention.

[0058] The above are only preferred specific implementation modes of the present invention, but the protection scope of the present invention is not limited thereto. Any technical solution, conception, and design obtained by equivalent replacement or modification of the technical solution and inventive concept of the present invention by any technician familiar with the technical field within the technical scope disclosed by the present invention should be covered by the protection scope of the present invention.

Claims

1. A plate heat exchanger, comprising a first plate (1) and a second plate (2), wherein the plate heat exchanger has at least a first heat exchange channel (3), wherein the first heat exchange channel (3) is located between the first plate (1) and the second plate (2), and wherein: The first plate (1) comprises a first base (100) and a first dividing rib (101) protruding from the first base (100), the first base (100) having a first corner hole (102) and a second corner hole (103), at least a portion of the first dividing rib (101) being located between the first corner hole (102) and the second corner hole (103); The first plate (1) comprises a first flow-blocking member (104) protruding from the first substrate (100); the first flow-blocking member (104) is located on one side of the first dividing rib (101); along the length direction of the first substrate (100), the end of the first substrate (100) where the first corner hole (102) is located is defined as the first end (114); the first flow-blocking member (104) comprises a first flow-blocking wall portion (1041) and a second flow-blocking wall portion (1042); the first flow-blocking wall portion (1041) as a whole extends in a direction away from the first end (114) and at the same time away from the first dividing rib (101); the second flow-blocking wall portion (1042) as a whole extends in a direction away from the first end (114) and at the same time close to the first dividing rib (101).

2. The plate heat exchanger according to claim 1, characterized in that: The first dividing rib (101) has at least two first protrusions (10121) protruding along the width direction of the first substrate (101), the first flow-aiding member (104) and the first protrusion (10121) are located on the same side of the first dividing rib (101), and at least part of the first flow-aiding member (104) is located between the two first protrusions (10121).

3. The plate heat exchanger according to claim 1 or 2, characterized in that: The first flow spoiler (104) is in a triangular shape as a whole, and a first spacing (105) is provided between the triangular first flow spoiler (104) and the first dividing rib (101); or, the first flow spoiler (104) is in a quadrilateral shape as a whole, the first flow spoiler wall portion (1041) and the second flow spoiler wall portion (1042) are two side wall portions of the quadrilateral first flow spoiler (104), and a second spacing (106) is provided between the quadrilateral first flow spoiler (104) and the first dividing rib (101).

4. The plate heat exchanger according to claim 2, characterized in that: Along the protruding direction of the first protrusion (10121), the highest point of the first protrusion (10121) is not lower than the lowest point of the first baffle wall portion (1041), and the highest point of the first protrusion (10121) is not lower than the lowest point of the second baffle wall portion (1042), and\or, the first dividing rib (101) includes a first concave portion (10122), and the first protrusion (10121) is directly or indirectly connected to the first concave portion (10122).

5. The plate heat exchanger according to claim 1, 2 or 4, characterized in that: The first plate (1) comprises a second baffle (107) protruding from the first substrate (100); the second baffle (107) and the first baffle (104) are respectively located on both sides of the first dividing rib (101); the second baffle (107) comprises a third baffle wall portion (1071) and a fourth baffle wall portion (1072); the third baffle wall portion (1071) as a whole extends in a direction away from the first end portion (114) and at the same time away from the first dividing rib (101); the fourth baffle wall portion (1072) as a whole extends in a direction away from the first end portion (114) and at the same time close to the first dividing rib (101).

6. The plate heat exchanger according to claim 5, characterized in that: The first flow guide section (1012) comprises second convex portions (10123) and second concave portions (10124) which are alternately arranged, wherein the second concave portion (10124) is located on the back side of the first convex portion (10121), the second convex portion (10123) is located on the back side of the first concave portion (10122), and at least a portion of the second flow blocking member (107) is located between two adjacent second convex portions (10123).

7. The plate heat exchanger according to claim 1, characterized in that: The first dividing rib (101) comprises a first blocking section (1011) and a first guide section (1012); one end of the first blocking section (1011) is connected to the first end portion (114); the other end of the first blocking section (1011) is connected to the first guide section (1012); the other end of the first substrate (100) relative to the first end portion (114) is defined as the second end portion (115); a connecting channel (111) exists between the first guide section (1012) and the second end portion (115); and along the thickness direction of the first substrate (100), the height of the first blocking section (1011) is not higher than the height of the first guide section (1012).

8. The plate heat exchanger according to claim 1 or 2 or 4 or 6 or 7, characterized in that: The first plate (1) comprises a first spoiler area (108) and a second spoiler area (109) located on both sides of the first dividing rib (101); the first spoiler area (108) and the second spoiler area (109) have spoiler convex points (110); the spoiler convex points (110) protrude from the first substrate (100); the spoiler convex points (110) of the first spoiler area (108) away from the edge of the first plate (1) are more densely distributed than the spoiler convex points (110) close to the edge of the plate; and the spoiler convex points (110) of the second spoiler area (109) away from the edge of the first plate (1) are more densely distributed than the spoiler convex points (110) close to the edge of the plate.

9. The plate heat exchanger according to claim 8, characterized in that: The projection of the spoiler convex point (110) on the plane where the first substrate (100) is located is an ellipse or a circle.

10. The plate heat exchanger according to claim 1 or 2 or 4 or 6 or 7 or 9, characterized in that: The second plate (2) and the first plate (1) are stacked up front and back, the second plate (2) comprises a second base (200) and a second dividing rib (201) protruding from the second base (200), the second plate (2) comprises a third flow-blocking member (202) and a fourth flow-blocking member (203) protruding from the second base (200), the third flow-blocking member (202) and the fourth flow-blocking member (203) are respectively located on both sides of the second dividing rib (201), the second dividing rib (201) comprises a second blocking section (2011) and a second flow-guiding section (2012), and the second flow-guiding section (2012) and the first flow-guiding section (1012) are stacked.

Images