Pointed wave plate heat exchanger plate and plate heat exchanger

Abstract

The utility model provides a kind of point wave form plate heat exchanger sheet, including sheet body, sheet body includes first fluid inlet and outlet area, second fluid inlet and outlet area and core heat exchange zone, core heat exchange zone is communicated with first fluid inlet and outlet area, second fluid inlet and outlet area, first concave-convex structure is provided in core heat exchange zone, first concave-convex structure includes several first protrusions and several first recesses, several first recesses are matrix distribution and the interval arrangement between adjacent two first recesses, several first protrusions are matrix distribution and the interval arrangement between adjacent two first protrusions, several first protrusions and several first recesses are staggered arrangement.The utility model further provides a kind of plate heat exchanger, including several first sheet and several second sheet, several first sheet and several second sheet are alternately stacked in turn, first sheet, second sheet respectively have first sheet body, second sheet body, first sheet body and second sheet body are mirror image symmetry structure.

Description

Technical Field

[0001] This utility model relates to the technical field of brazed plate heat exchangers, and in particular to a point-wave plate heat exchanger plate and a plate heat exchanger. Background Technology

[0002] Currently, with the rapid development of industries such as energy storage, batteries, air conditioning, HVAC, chemicals, and AI, the demand for thermal management systems is increasing. Furthermore, thermal management systems are trending towards miniaturization, leading to a growing demand for small, high-performance brazed plate heat exchangers.

[0003] In the existing technology, the commonly used brazed plate heat exchanger plates have herringbone waveforms and continuous point waveforms.

[0004] Herringbone corrugated plates have become the mainstream in the market due to their low cost and mature processing technology. However, their heat exchange performance is limited, making it increasingly difficult to meet higher demands.

[0005] Continuous corrugated plates have multiple continuously arranged concave and convex structures. The continuous arrangement of two adjacent concave and convex structures is achieved through a curved surface transition. However, the processing accuracy of this arrangement is difficult to guarantee. It may result in poor uniformity of the flow channel formed after two continuous corrugated plates are welded together, which will affect heat exchange. Moreover, the flow channel will have a reduced cross-sectional area due to the curvature change between the concave and convex structures, which will greatly increase the flow resistance and affect the heat exchange efficiency. Utility Model Content

[0006] The purpose of this utility model is to provide a point-wave plate heat exchanger plate and a plate heat exchanger, which aims to solve or at least partially solve the shortcomings of the above-mentioned background technology. It can guide the working fluid to flow evenly through the heat exchange zone, reduce the pressure loss of the fluid, greatly increase the heat exchange area of ​​the plate and improve the heat exchange efficiency.

[0007] This utility model provides a point-wave plate heat exchanger plate, including a plate body. The plate body includes a first fluid inlet / outlet area, a second fluid inlet / outlet area, and a core heat exchange area located between the first fluid inlet / outlet area and the second fluid inlet / outlet area, respectively disposed at both ends along its length. The core heat exchange area is connected to the first fluid inlet / outlet area and the second fluid inlet / outlet area. A first concave-convex structure is provided in the core heat exchange area. The first concave-convex structure includes several first protrusions and several first depressions. The several first depressions are distributed in a matrix and adjacent first depressions are spaced apart. The several first protrusions are distributed in a matrix and adjacent first protrusions are spaced apart. The several first protrusions and several first depressions are arranged in a staggered manner.

[0008] Furthermore, both the first protrusion and the first depression are frustum-shaped.

[0009] Furthermore, the distance between two adjacent first protrusions is equal to the distance between two adjacent first depressions.

[0010] Furthermore, the height of the first protrusion and the depth of the first depression are equal.

[0011] Furthermore, the plate body is provided with a first inlet, a first outlet, a second inlet, and a second outlet. The first inlet and the first outlet are located on the same side, and the second inlet and the second outlet are located on the same side. The first inlet and the second outlet are located within the first fluid inlet and outlet area, and the second inlet and the first outlet are located within the second fluid inlet and outlet area.

[0012] Furthermore, a first diversion structure is provided around the periphery of the first inlet and the first outlet, and a second diversion structure is provided around the periphery of the second inlet and the second outlet.

[0013] Furthermore, the first diversion structure consists of several second depressions arranged in a ring; the second diversion structure consists of several second protrusions arranged in a ring.

[0014] Furthermore, a second concave-convex structure is provided in the first fluid inlet / outlet area and the second fluid inlet / outlet area, respectively, and the second concave-convex structure is arranged around the first inlet, the first outlet, the second inlet, and the second outlet.

[0015] Furthermore, the second concave-convex structure includes several third protrusions and several third depressions, with the several third protrusions and several third depressions arranged in a staggered manner.

[0016] This utility model also provides a plate heat exchanger, including a plurality of first plates and a plurality of second plates, wherein the plurality of first plates and the plurality of second plates are stacked alternately in sequence. The first plates are the aforementioned point-wave plate heat exchanger plates. The first plates and the second plates each have a first plate body and a second plate body. The front side of the second plate body and the back side of the first plate body are mirror-symmetrical. The back side of the second plate body and the front side of the adjacent second plate body form a first fluid flow channel for a first fluid to pass through. The front side of the first plate body and the back side of the adjacent second plate body form a second fluid flow channel for a second fluid to pass through.

[0017] The dot-wave plate heat exchanger plate provided by this utility model, through the matrix distribution of several first protrusions, the matrix distribution of several first depressions, and the staggered arrangement between them, has two advantages. Firstly, this structure can uniformly distribute the fluid, eliminating the need for a flow guide zone and reducing heat exchange dead zones. This not only reduces fluid pressure loss but also increases the area of ​​the core heat exchange zone. Secondly, this structure allows for the distribution of as many first protrusions and depressions as possible in the core heat exchange zone, while significantly increasing the turbulence effect and improving heat exchange efficiency. Furthermore, the first protrusions and depressions of the dot-wave plate heat exchanger plate of this utility model are spaced apart, making its processing technology and precision simpler and more controllable compared to the continuous dot-wave plate plates in the prior art.

[0018] The plate heat exchanger provided by this utility model consists of several first plates and several second plates stacked alternately in sequence, with the bodies of the first plates and the bodies of the second plates having a mirror-symmetrical structure. The two plates cooperate with each other to form a first fluid flow channel and a second fluid flow channel. The first fluid and the second fluid flow on the front and back sides of the first plate body or the second plate body, respectively, to achieve heat exchange. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a top view of a dot-wave plate heat exchanger plate according to the present invention.

[0021] Figure 2 for Figure 1 A magnified diagram of point A in the middle.

[0022] Figure 3 for Figure 1 A schematic diagram of the first fluid inlet and outlet zone.

[0023] Figure 4 for Figure 1 A schematic diagram of the second fluid inlet / outlet zone.

[0024] Figure 5 This is a perspective view of the first and second plates stacked together in this utility model.

[0025] Figure 6 for Figure 5 The diagram shows a three-dimensional exploded view of the stacked first and second plates.

[0026] Figure 7For along Figure 5 A cross-sectional view of the WW line.

[0027] Figure 8 for Figure 7 A magnified diagram of point B in the middle.

[0028] Figure 9 For along Figure 5 A cross-sectional view of the OO line.

[0029] Figure 10 for Figure 9 A magnified diagram of point C.

[0030] The attached diagram lists the components represented by each number as follows:

[0031] 1. Waveform plate heat exchanger plate; 10. Plate body; 11. First fluid inlet / outlet area; 111. First inlet; 112. Second outlet; 12. Second fluid inlet / outlet area; 121. First outlet; 122. Second inlet; 13. Core heat exchange area; 14. First protrusion; 15. First depression; 16. Second protrusion; 17. Second depression; 18. Third protrusion; 19. Third depression; 2. First plate; 20. First plate body; 3. Second plate; 30. Second plate body; 40. First diversion column; 50. Second diversion column; 60. Third diversion column; 70. Concave-convex hull structure. Detailed Implementation

[0032] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0033] The terms “first,” “second,” “third,” “fourth,” etc. (if present) in the specification and claims of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0034] The directional terms such as "up," "down," "left," "right," "front," "back," "top," and "bottom" (if present) used in the specification and claims of this utility model are defined according to the position of the structures in the drawings and the relative positions of the structures, and are only for the purpose of clarity and convenience in expressing the technical solution. It should be understood that the use of directional terms should not limit the scope of protection claimed in this application.

[0035] Please see Figure 1 and Figure 2A point-wave plate heat exchanger plate 1 includes a plate body 10. The plate body 10 includes a first fluid inlet / outlet area 11, a second fluid inlet / outlet area 12 and a core heat exchange area 13 located between the first fluid inlet / outlet area 11 and the second fluid inlet / outlet area 12 respectively disposed at both ends along its length direction. The core heat exchange area 13 is connected to the first fluid inlet / outlet area 11 and the second fluid inlet / outlet area 12.

[0036] The core heat exchange zone 13 is provided with a first concave-convex structure, which includes several first protrusions 14 and several first depressions 15. The several first depressions 15 are distributed in a matrix and adjacent first depressions 15 are spaced apart. The several first protrusions 14 are distributed in a matrix and adjacent first protrusions 14 are spaced apart. The several first protrusions 14 and the several first depressions 15 are arranged in a staggered manner.

[0037] As described above, the dot-wave plate heat exchanger plate 1 provided by this utility model, through the matrix distribution of several first protrusions 14, the matrix distribution of several first recesses 15, and the staggered arrangement between them, on the one hand, can uniformly distribute the fluid, eliminating the need for a flow guide zone and reducing heat exchange dead zones, thus not only reducing fluid pressure loss but also increasing the area of ​​the core heat exchange zone 13. On the other hand, this structure allows the core heat exchange zone 13 to have as many first protrusions 14 and first recesses 15 as possible, while greatly increasing the turbulence effect and improving heat exchange efficiency. In addition, the first protrusions 14 and first recesses 15 of the dot-wave plate heat exchanger plate 1 of this utility model are all spaced apart, and its processing technology and processing precision are simpler and more controllable than those of the continuous dot-wave plate in the prior art.

[0038] This embodiment uses three plates as an example for illustration:

[0039] Please see Figure 5 and Figure 6 The three plates consist of two first plates 2 and one second plate 3. The first plate 2 is the aforementioned point-wave plate heat exchanger plate 1. The first plate 2 and the second plate 3 each have a first plate body 20 and a second plate body 30, respectively. The front of the second plate body 30 is mirror-symmetrical with the back of the first plate body 20, and the back of the second plate body 30 is mirror-symmetrical with the front of the first plate body 20. The two first plates 2 are located on the front and back of the second plate 3, respectively. The front of the second plate body 30 and the back of the first plate body 20 form a first fluid flow channel (not shown in the figure) through which the first fluid can pass. The front of the other first plate body 20 and the back of the second plate body 30 form a second fluid flow channel (not shown in the figure) through which the second fluid can pass.

[0040] Furthermore, please refer to Figure 7 and Figure 8A first recess 15 of a first plate body 20 and a first protrusion 14 of a second plate body 30 are connected by welding to form a first diversion column 40 for diverting fluid. A first protrusion 14 of another first plate body 20 and a first recess 15 of a second plate body 30 are connected by welding to form a first diversion column 40. When the fluid encounters the first diversion column 40, the first diversion column 40 diverts the fluid, and the fluid flows evenly to both sides of the first diversion column 40 while exchanging heat. In addition, a sufficient number of first diversion columns 40 greatly enhances the structural strength of the plate heat exchanger and increases its pressure resistance.

[0041] A first protrusion 14 of a first plate body 20 and a first recess 15 of a second plate body 30 cooperate to form a bump-and-contour structure 70. A first recess 15 of another first plate body 20 and a first protrusion 14 of a second plate body 30 cooperate to form a bump-and-contour structure 70. When the fluid flows through the bump-and-contour structure 70, the fluid will form turbulence, thereby improving the heat exchange efficiency. Since the first protrusion 14 and the first recess 15 are staggered, the cross-sectional area of ​​the first fluid flow channel and the second fluid flow channel will not decrease when the fluid passes through the bump-and-contour structure 70, and the flow resistance of the fluid will not increase.

[0042] Furthermore, preferably, both the first protrusion 14 and the first recess 15 are frustum-shaped. Since the circumference of a circle is longer than that of other shapes, the frustum-shaped design of the first protrusion 14 and the first recess 15 can greatly increase the overall heat exchange area of ​​the first protrusion 14 and the first recess 15, thereby improving the heat exchange efficiency. As another embodiment, the first protrusion 14 and the first recess 15 can also be elliptical in shape, forming an elliptical dot wave structure.

[0043] Furthermore, preferably, the distance between two adjacent first protrusions 14 is equal to the distance between two adjacent first recesses 15. This arrangement makes the distribution of the first protrusions 14 and the first recesses 15 more uniform, thereby improving the uniformity of fluid diversion. As another embodiment, the distance between two adjacent first protrusions 14 is approximately the same as the distance between two adjacent first recesses 15, that is, the distance is preferably equal, but a certain error is also allowed, as long as the error does not affect the arrangement of the first protrusions 14 and the first recesses 15.

[0044] Furthermore, preferably, the height of the first protrusion 14 and the depth of the first recess 15 are equal. This arrangement ensures that the turbulence effect of the upper and lower parts of the protrusion and recess is uniform as the fluid flows along the first and second fluid channels, thereby preventing increased flow resistance. As another embodiment, the height of the first protrusion 14 and the depth of the first recess 15 are approximately the same, i.e., their heights are preferably equal. However, a certain degree of error is permissible, as long as this error does not affect the operation of the first protrusion 14 and the first recess 15.

[0045] For more details, please see Figure 1 The plate body 10 is provided with a first inlet 111, a first outlet 121, a second inlet 122 and a second outlet 112. The first inlet 111 and the first outlet 121 are located on the same side, and the second inlet 122 and the second outlet 112 are located on the same side. The first inlet 111 and the second outlet 112 are located in the first fluid inlet and outlet area 11, and the second inlet 122 and the first outlet 121 are located in the second fluid inlet and outlet area 12.

[0046] The first inlet 111 and the first outlet 121 of one first plate 2 are respectively connected to the first fluid flow channel, and the second inlet 122 and the second outlet 112 of the other first plate 2 are respectively connected to the second fluid flow channel. The first fluid and the second fluid flow on the front and back sides of the second plate body 30 to achieve heat exchange.

[0047] Furthermore, please refer to Figure 3 , Figure 4 and Figure 9 The periphery of the first inlet 111 and the first outlet 121 is provided with a first diversion structure, and the periphery of the second inlet 122 and the second outlet 112 is provided with a second diversion structure. When the first fluid flows through the first inlet 111, the first diversion structure diverts the first fluid, causing the first fluid to diffuse circumferentially towards the first inlet 111 and flow evenly into the first fluid channel; when the second fluid flows through the second inlet 122, the second diversion structure diverts the second fluid, causing the second fluid to diffuse circumferentially towards the second inlet 122 and flow evenly into the second fluid channel.

[0048] More specifically, the first flow-diverting structure consists of several second recesses 17 arranged in a ring; the second flow-diverting structure consists of several second protrusions 16 arranged in a ring. The second recesses 17 of the first plate 2 and the second protrusions 16 of the second plate 3 cooperate to form the second flow-diverting column 50. When the first fluid encounters the second flow-diverting column 50, the second flow-diverting column 50 diverts the fluid, and the first fluid flows uniformly to both sides of the second flow-diverting column 50 while simultaneously exchanging heat. Therefore, the second flow-diverting column 50 plays the role of flow diversion and auxiliary heat exchange.

[0049] Furthermore, please refer to Figure 3 , Figure 4 , Figure 9 and Figure 10 A second concave-convex structure is provided in the first fluid inlet / outlet area 11 and the second fluid inlet / outlet area 12, respectively, and the second concave-convex structure is arranged around the first inlet 111, the first outlet 121, the second inlet 122, and the second outlet 112. The second concave-convex structure serves to divert the flow and assist in heat exchange.

[0050] More specifically, the second concave-convex structure includes several third protrusions 18 and several third recesses 19. The several third protrusions 18 and several third recesses 19 are staggered to accommodate as many second concave-convex structures as possible. The third recesses 19 of one first plate body 20 and the third protrusions 18 of the second plate body 30 are welded together to form a third diversion column 60 for diverting fluid. The third protrusions 18 of another first plate body 20 and the third recesses 19 of the second plate body 30 are welded together to form a third diversion column 60. When the fluid encounters the third diversion column 60, the third diversion column 60 diverts the fluid, and the fluid flows uniformly to both sides of the third diversion column 60 while exchanging heat. In addition, the third diversion column 60 can enhance the structural strength of the plate heat exchanger and increase its pressure resistance.

[0051] The third protrusion 18 of the first plate body 20 and the third recess 19 of the second plate body 30 cooperate to form a bump-and-contour structure 70. The third recess 19 of the other first plate body 20 and the third protrusion 18 of the second plate body 30 form a bump-and-contour structure 70. When the fluid flows through the bump-and-contour structure 70, the fluid will form turbulence, thereby improving the heat exchange efficiency.

[0052] The first protrusion 14, the second protrusion 16, and the third protrusion 18 are all frustum-shaped protrusions with the same shape and size, and the first depression 15, the second depression 17, and the third depression 19 are all frustum-shaped depressions with the same shape and size.

[0053] In addition, this utility model also provides a plate heat exchanger, including a plurality of first plates 2 and a plurality of second plates 3, which are stacked alternately in sequence. The first plates 2 are the point-wave plate heat exchanger plates 1 in the above embodiment. The first plates 2 and the second plates 3 respectively have a first plate body 20 and a second plate body 30. The front side of the second plate body 30 and the back side of the first plate body 20 are mirror-symmetrical, and the back side of the second plate body 30 and the front side of the first plate body 20 are mirror-symmetrical. A first fluid flow channel for a first fluid to pass through is formed on the back side of the first plate body 20 and the front side of the adjacent second plate body 30, and a second fluid flow channel for a second fluid to pass through is formed on the front side of the first plate body 20 and the back side of the adjacent second plate body 30. The first fluid and the second fluid flow on the front and back sides of the first plate body 20 or the second plate body 30 respectively to achieve heat exchange.

[0054] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A point-wave plate heat exchanger plate, comprising a plate body (10), wherein the plate body (10) includes a first fluid inlet / outlet area (11), a second fluid inlet / outlet area (12) respectively disposed at both ends along its length, and a core heat exchange area (13) located between the first fluid inlet / outlet area (11) and the second fluid inlet / outlet area (12), characterized in that, The core heat exchange zone (13) is connected to the first fluid inlet and outlet zone (11) and the second fluid inlet and outlet zone (12). The core heat exchange zone (13) is provided with a first concave-convex structure, which includes several first protrusions (14) and several first depressions (15). The several first depressions (15) are distributed in a matrix and two adjacent first depressions (15) are spaced apart. The several first protrusions (14) are distributed in a matrix and two adjacent first protrusions (14) are spaced apart. The several first protrusions (14) and the several first depressions (15) are arranged in a staggered manner.

2. The point-wave plate heat exchanger plates as described in claim 1, characterized in that, The first protrusion (14) and the first depression (15) are both frustum-shaped.

3. The point-wave plate heat exchanger plates as described in claim 1, characterized in that, The distance between two adjacent first protrusions (14) is equal to the distance between two adjacent first depressions (15).

4. The point-wave plate heat exchanger plates as described in claim 1, characterized in that, The height of the first protrusion (14) and the depth of the first depression (15) are equal.

5. The point-wave plate heat exchanger plates as described in any one of claims 1 to 4, characterized in that, The plate body (10) is provided with a first inlet (111), a first outlet (121), a second inlet (122) and a second outlet (112). The first inlet (111) and the first outlet (121) are located on the same side, and the second inlet (122) and the second outlet (112) are located on the same side. The first inlet (111) and the second outlet (112) are located within the first fluid inlet / outlet area (11), and the second inlet (122) and the first outlet (121) are located within the second fluid inlet / outlet area (12).

6. The point-wave plate heat exchanger plates as described in claim 5, characterized in that, The periphery of the first inlet (111) and the first outlet (121) is provided with a first diversion structure, and the periphery of the second inlet (122) and the second outlet (112) is provided with a second diversion structure.

7. The point-wave plate heat exchanger plates as described in claim 6, characterized in that, The first diversion structure consists of several second depressions (17), which are arranged in a ring; the second diversion structure consists of several second protrusions (16), which are arranged in a ring.

8. The point-wave plate heat exchanger plates as described in claim 5, characterized in that, The first fluid inlet / outlet area (11) and the second fluid inlet / outlet area (12) are respectively provided with a second concave-convex structure, which is arranged around the first inlet (111), the first outlet (121), the second inlet (122), and the second outlet (112).

9. The point-wave plate heat exchanger plates as described in claim 8, characterized in that, The second concave-convex structure includes several third protrusions (18) and several third recesses (19), with the several third protrusions (18) and several third recesses (19) arranged in a staggered manner.

10. A plate heat exchanger, comprising a plurality of first plates (2) and a plurality of second plates (3), wherein the plurality of first plates (2) and the plurality of second plates (3) are stacked alternately in sequence, characterized in that, The first plate (2) is the point-wave plate heat exchanger plate (1) according to any one of claims 1 to 9. The first plate (2) and the second plate (3) respectively have a first plate body (20) and a second plate body (30). The front side of the second plate body (30) and the back side of the first plate body (20) are mirror symmetrical. The back side of the second plate body (30) and the front side of the first plate body (20) are mirror symmetrical. The back side of the first plate body (20) and the front side of the adjacent second plate body (30) form a first fluid flow channel for the first fluid to pass through. The front side of the first plate body (20) and the back side of the adjacent second plate body (30) form a second fluid flow channel for the second fluid to pass through.

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