A plate-fin heat exchanger

Abstract

The utility model discloses a kind of plate-fin heat exchangers, belong to heat exchanger technical field, including shell, several square tubes are equipped on the shell, the several square tubes are all communicated with shell interior;Core is arranged in the shell interior, the core includes plate-fin, first sealing strip and second sealing strip, second sealing strip is arranged in the upper and lower end of plate-fin, and plate-fin includes vertical plate and horizontal plate, the vertical plate and horizontal plate are spaced apart and arranged several, and first sealing strip is arranged between vertical plate and horizontal plate. It can effectively increase heat exchange area under the premise of guaranteeing structural stability, and improve heat exchange efficiency;And welding seam length can be greatly reduced, and installation efficiency is improved.

Description

Technical Field

[0001] This utility model belongs to the field of heat exchanger technology, specifically relating to a folded plate heat exchanger. Background Technology

[0002] The statements in this section are merely background information related to this utility model and do not necessarily constitute prior art.

[0003] Heat exchangers, as highly efficient heat exchange equipment, are widely used in chemical, energy, and refrigeration fields. The core structure of existing heat exchangers mostly consists of multiple independent plates stacked together to form flow channels, and the plates usually require extensive welding or sealing with gaskets.

[0004] Traditional plate heat exchangers typically employ stacked plates to form flow channels. The large number of plates and complex assembly limit the effective heat exchange area, which is constrained by the size of individual plates and the gaps between them, making significant increases difficult. Furthermore, the multi-plate arrangement restricts the flow paths of hot and cold fluids, often hindering complete counter-current heat exchange and reducing the utilization rate of the heat exchange temperature difference, thus limiting heat exchange efficiency. In addition, some traditional structures add protrusions or corrugations to the plates to increase area; however, assembly errors in multi-plate designs can prevent these structures from functioning effectively, potentially increasing resistance due to flow channel turbulence and indirectly affecting heat exchange performance. Moreover, the numerous welds or gaskets in traditional structures occupy potential heat exchange areas, further reducing the effective heat exchange area. The presence of welds or gaskets can also disrupt the continuity of fluid flow, leading to localized decreases in heat exchange efficiency and hindering efficient and uniform heat exchange. Utility Model Content

[0005] To address the aforementioned problems, this utility model provides a folded plate heat exchanger that can effectively increase the heat exchange area and improve heat exchange efficiency while ensuring structural stability; it can also significantly reduce weld length and improve installation efficiency.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A folded plate heat exchanger includes a shell with a plurality of square tubes connected to the interior of the shell. A core is disposed inside the shell, the core including a folded plate, a first sealing strip, and a second sealing strip. The second sealing strip is disposed at the upper and lower ends of the folded plate. The folded plate includes vertical plates and horizontal plates, with a plurality of vertical and horizontal plates spaced apart. The first sealing strip is disposed between the vertical and horizontal plates.

[0007] As a further technical solution, the horizontal plate and the vertical plate are an integral structure, the second sealing strip is an L-shaped structure, and the first sealing strip is a long strip structure.

[0008] As a further technical solution, the second sealing strips at the upper and lower ends of the folding plate face opposite directions. The second sealing strips are fixed between the folding plate and the inner wall of the outer shell. One surface of the second sealing strip is in close contact with the inner wall of the outer shell, and the other surface is in close contact with the folding plate.

[0009] As a further technical solution, the first sealing strip is symmetrically arranged on the folding plate, and several first sealing strips are spaced apart; the upper and lower surfaces of the first sealing strip are in close contact with the horizontal plate, and the side of the first sealing strip is in close contact with the vertical plate.

[0010] As a further technical solution, a number of positioning blocks are spaced apart on the inner wall surface of the outer shell, and the positioning blocks are distributed at both ends inside the outer shell, and the positioning blocks are engaged with the folding plate.

[0011] As a further technical solution, the first sealing strip and the folding plate are welded together at the first weld seam; the first sealing strip and the inner wall surface of the outer shell are welded together at the third weld seam.

[0012] As a further technical solution, the two ends of the folding plate are welded to the inner wall of the outer shell, with the welding position at one end being the second weld and the welding position at the other end being the fourth weld.

[0013] As a further technical solution, the square tube includes a first inlet square tube, a second inlet square tube, a first outlet square tube, and a second outlet square tube, with the first outlet square tube disposed at one end of the outer shell.

[0014] As a further technical solution, the second outlet square tube is disposed at the other end of the housing, the second inlet square tube is disposed at the front of the housing, and the first inlet square tube is disposed at the rear of the housing.

[0015] As a further technical solution, the first inlet square tube, the second inlet square tube, the first outlet square tube, and the second outlet square tube are all fixedly connected to the outer shell.

[0016] Compared with the prior art, the advantages and positive effects of this utility model are: This utility model features a folded plate with an integrated structure consisting of alternating vertical and horizontal plates. Combined with a first and second sealing strip, the folded plate is divided into symmetrically spaced vertical and horizontal flow channels along its centerline, forming a continuous and stable integral core structure. This avoids the structural instability caused by assembly errors in traditional multi-plate stacking, significantly improving the overall structural stability. The alternating vertical and horizontal plate structure formed by the integrated bending of the folded plate greatly increases the heat exchange area for fluid contact within the same space. Furthermore, the flow channels formed by the folded plate allow for counter-current flow of hot and cold fluids, improving the utilization rate of heat exchange temperature difference. The integrated structure also reduces flow channel disorder caused by multi-plate splicing, lowers flow resistance, and ensures uniform and efficient heat exchange, thereby significantly improving overall heat exchange efficiency.

[0017] The core of this invention is integrally formed by folded plates, reducing the need for splicing multiple plates. Fixing is achieved solely through welding the first sealing strip to the folded plate and the outer shell, and welding the two ends of the folded plate to the outer shell, significantly shortening the total weld length. Simultaneously, the positioning block assists in the rapid positioning of the folded plate, reducing adjustment steps during installation, significantly simplifying the assembly process, and improving installation efficiency. Attached Figure Description

[0018] The accompanying drawings, which form part of this specification, are used to provide a further understanding of this utility model. The illustrative embodiments of this utility model and their descriptions are used to explain this utility model and do not constitute an improper limitation of this utility model.

[0019] Figure 1 This is a schematic diagram of the structure of the folded plate heat exchanger of this utility model; Figure 2 This is a structural diagram of the core of this utility model; Figure 3 This is an enlarged view of the core structure of this utility model; Figure 4 This is a diagram of the folding plate structure of this utility model; Figure 5 This is an enlarged view of the folding plate structure of this utility model; Figure 6 This is a diagram showing the arrangement of the sealing strips in this utility model; Figure 7 This is a schematic diagram of the outer shell and core of this utility model; Figure 8 This is a schematic diagram of the weld position of this utility model; In the diagram: 1. First outlet square tube; 2. Core; 3. Second inlet square tube; 4. Outer shell; 5. First inlet square tube; 6. Second outlet square tube; 301. First sealing strip; 302. Second sealing strip; 303. Folding plate; 3031. Horizontal plate; 3032. Vertical plate; 401. Positioning block; 402. First weld; 403. Second weld; 404. Third weld; 405. Fourth weld. Detailed Implementation

[0020] It should be noted that the following detailed description is illustrative and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0021] Traditional plate heat exchangers typically employ stacked plates to form flow channels. The large number of plates and complex assembly limit the effective heat exchange area, which is constrained by the size of individual plates and the gaps between them, making significant increases difficult. Furthermore, the multi-plate arrangement restricts the flow paths of hot and cold fluids, often hindering complete counter-current heat exchange and reducing the utilization rate of the heat exchange temperature difference, thus limiting heat exchange efficiency. In addition, some traditional structures add protrusions or corrugations to the plates to increase area; however, assembly errors in multi-plate designs can prevent these structures from functioning effectively, potentially increasing resistance due to flow channel turbulence and indirectly affecting heat exchange performance. Moreover, the numerous welds or gaskets in traditional structures occupy potential heat exchange areas, further reducing the effective heat exchange area. The presence of welds or gaskets can also disrupt the continuity of fluid flow, leading to localized decreases in heat exchange efficiency and hindering efficient and uniform heat exchange.

[0022] The present invention will now be described in detail with reference to the accompanying drawings. This embodiment discloses a 303 folding plate heat exchanger, such as... Figure 1 and Figure 2 As shown, the device includes an outer shell 4, on which several square tubes are provided, all of which are connected to the interior of the outer shell 4. Inside the outer shell 4, a core 2 is provided. The core 2 includes a folding plate 303, a first sealing strip 301, and a second sealing strip 302. The upper and lower ends of the folding plate 303 are provided with the second sealing strip 302. The folding plate 303 includes a vertical plate 3032 and a horizontal plate 3031, with several vertical plates 3032 and horizontal plates 3031 spaced apart. The first sealing strip 301 is provided between the vertical plates 3032 and the horizontal plates 3031.

[0023] Specifically, such as Figure 3 , Figure 4 as well as Figure 5As shown, the folding plate 303 is formed by folding a flat plate in a serpentine manner to create dozens of layers of planar flow channels that are separated vertically. The flat plate in the middle area of ​​the folding angle forms the vertical plate 3032 and the horizontal plate 3031. The folding plate 303 adopts an integrated structure with the vertical plate 3032 and the horizontal plate 3031 spaced apart. With the sealing and fixing of the first sealing strip 301 and the second sealing strip 302, the first sealing strip 301 and the second sealing strip 302 separate the folding plate 303 into flow channels that are symmetrically spaced vertically along the center line, forming a continuous and stable integral core 2 structure. This avoids the structural instability caused by assembly errors in traditional multi-plate stacking and significantly improves the stability of the overall structure.

[0024] The folded plate 303, through its alternating structure of vertical plate 3032 and horizontal plate 3031 formed by integral bending, significantly increases the heat exchange area for fluid contact within the same space. Furthermore, the flow channels formed by the folded plate 303 allow for counter-current flow paths between hot and cold fluids, improving the utilization rate of the heat exchange temperature difference. The integrated structure also reduces flow channel turbulence caused by the splicing of multiple plates, lowering flow resistance and ensuring the uniformity and efficiency of heat exchange, thereby significantly improving the overall heat exchange efficiency.

[0025] Specifically, a regular corrugated structure can be stamped out before bending, which can improve the rigidity of the plate and increase the heat exchange area of ​​the fluids above and below.

[0026] like Figure 6 and Figure 7 As shown, the horizontal plate 3031 and the vertical plate 3032 are an integral structure. The second sealing strip 302 has an L-shaped structure, and the first sealing strip 301 has a long strip structure. The second sealing strips 302 at the upper and lower ends of the folding plate 303 face opposite directions. The second sealing strips 302 are fixed between the folding plate 303 and the inner wall of the outer shell 4. One surface of the second sealing strip 302 is in close contact with the inner wall of the outer shell 4, and the other surface is in close contact with the folding plate 303. The first sealing strips 301 are symmetrically arranged on the folding plate 303, with several first sealing strips 301 spaced apart. The upper and lower surfaces of the first sealing strips 301 are in close contact with the horizontal plate 3031, and the side of the first sealing strip 301 is in close contact with the vertical plate 3032.

[0027] Specifically, the second sealing strips 302 on the top and bottom sides of the folding plate 303 are L-shaped, requiring sealing of the top and bottom folding plates 303 and four points between them and the upper and lower outer shells. The first sealing strip 301 is a long strip structure that seals both ends of the folding plate 303. The first sealing strip 301 and the second sealing strip 302 need to be welded to the folding plate 303, with the welds concentrated at both ends. Except for the top and bottom second sealing strips 302, no welding is required on other areas, significantly reducing the weld length and improving the economy and reliability of the folding plate 303 heat exchanger.

[0028] like Figure 8As shown, a number of positioning blocks 401 are spaced apart on the inner wall surface of the outer shell 4. The positioning blocks 401 are distributed at both ends inside the outer shell 4, and the positioning blocks 401 are engaged with the folding plate 303.

[0029] Specifically, the positioning block 401 assists in the rapid positioning of the folding plate 303, reducing adjustment steps during installation, significantly simplifying the assembly process, and improving installation efficiency. The positioning block 401 can be installed at both ends inside the housing 4 or in the middle of the housing 4. By defining the position of the folding plate 303 through the positioning block 401, the rapid installation of the folding plate 303 can be achieved.

[0030] The first sealing strip 301 is welded to the folding plate 303 at the first weld 402; the first sealing strip 301 is welded to the inner wall of the outer shell 4 at the third weld 404. The two ends of the folding plate 303 are welded to the inner wall of the outer shell 4, with one end at the second weld 403 and the other end at the fourth weld 405.

[0031] Specifically, the core 2 is integrally formed by the folding plate 303, which reduces the need for splicing multiple plates. It is fixed by welding the first sealing strip 301 to the folding plate 303 and the outer shell 4, as well as by welding the two ends of the folding plate 303 to the outer shell 4, which greatly shortens the total length of the weld.

[0032] The square tube includes a first inlet square tube 5, a second inlet square tube 3, a first outlet square tube 1, and a second outlet square tube 6. The first outlet square tube 1 is located at one end of the outer casing 4. The second outlet square tube 6 is located at the other end of the outer casing 4. The second inlet square tube 3 is located at the front of the outer casing 4, and the first inlet square tube 5 is located at the rear of the outer casing 4. The first inlet square tube 5, the second inlet square tube 3, the first outlet square tube 1, and the second outlet square tube 6 are all fixedly connected to the outer casing 4.

[0033] Specifically, the first sealing strip 301 and the second sealing strip 302 divide the baffle 303 into symmetrically spaced upper and lower flow channels along the centerline. When fluid one flows in from the first inlet square tube 5, it turns 90 degrees and flows out from the first outlet square tube 1; fluid two flows in from the second inlet square tube 3, turns 90 degrees, and flows out from the second outlet square tube 6. Reverse flow is also possible, with hot and cold fluids flowing in from the first outlet square tube 1 and the second outlet square tube 6 respectively, and flowing out from the first inlet square tube 5 and the second inlet square tube 3, achieving countercurrent heat exchange in the core 2. The positions of the first inlet square tube 5, the second inlet square tube 3, the first outlet square tube 1, and the second outlet square tube 6 can be flexibly designed as needed, and can be designed on other surfaces in contact with the core 2.

[0034] Specifically, the fluid in the heat exchanger of this invention is usually transported by a pump. The specific type needs to be selected according to the properties of the fluid (such as pressure, flow rate, viscosity, etc.) and the operating conditions, such as centrifugal pumps, positive displacement pumps, and axial flow pumps. The function of these pumps is to provide power to the fluid so that it can flow continuously in the heat exchanger and complete the heat exchange process.

[0035] Although the specific embodiments of the present utility model have been described above in conjunction with the accompanying drawings, this is not intended to limit the scope of protection of the present utility model. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without creative effort based on the technical solution of the present utility model are still within the scope of protection of the present utility model.

Claims

1. A plate-and-shell heat exchanger, characterized by The device includes an outer shell, on which several square tubes are provided, all of which are connected to the interior of the outer shell; a core is provided inside the outer shell, the core including a folding plate, a first sealing strip and a second sealing strip, the second sealing strip being provided at the upper and lower ends of the folding plate, the folding plate including a vertical plate and a horizontal plate, several of which are spaced apart, and the first sealing strip being provided between the vertical plate and the horizontal plate.

2. A baffle plate heat exchanger as described in claim 1, characterized in that, The horizontal plate and the vertical plate are an integral structure, the second sealing strip is an L-shaped structure, and the first sealing strip is a long strip structure.

3. A baffle plate heat exchanger as described in claim 2, characterized in that, The second sealing strips at the upper and lower ends of the folding plate face opposite directions. The second sealing strips are fixed between the folding plate and the inner wall of the outer shell. One surface of the second sealing strip is in close contact with the inner wall of the outer shell, and the other surface is in close contact with the folding plate.

4. A plate-fin heat exchanger as claimed in claim 1, characterized in that The first sealing strip is symmetrically arranged on the folding plate, and several first sealing strips are spaced apart; the upper and lower surfaces of the first sealing strip are in close contact with the horizontal plate, and the side of the first sealing strip is in close contact with the vertical plate.

5. A plate-fin heat exchanger as claimed in claim 1, characterized in that Several positioning blocks are spaced apart on the inner wall surface of the outer shell, and the positioning blocks are distributed at both ends inside the outer shell. The positioning blocks are engaged with the folding plate.

6. A plate-fin heat exchanger as claimed in claim 1, characterized in that The first sealing strip is welded to the folding plate, and the welding position is the first weld; the first sealing strip is welded to the inner wall surface of the outer shell, and the welding position is the third weld.

7. A plate-and-shell heat exchanger as claimed in claim 6, characterized in that The two ends of the folding plate are welded to the inner wall of the outer shell. The welding position at one end is the second weld, and the welding position at the other end is the fourth weld.

8. A baffle plate heat exchanger as described in claim 1, characterized in that, The square tube includes a first inlet square tube, a second inlet square tube, a first outlet square tube, and a second outlet square tube, with the first outlet square tube disposed at one end of the outer shell.

9. A plate-and-shell heat exchanger as claimed in claim 7, characterized in that The second outlet square tube is located at the other end of the housing, the second inlet square tube is located at the front of the housing, and the first inlet square tube is located at the rear of the housing.

10. A baffle plate heat exchanger as described in claim 7, characterized in that, The first inlet square tube, the second inlet square tube, the first outlet square tube, and the second outlet square tube are all fixedly connected to the outer shell.

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