Fabricated heat exchanger

Abstract

The assembly type heat exchanger comprises a supporting frame, a fixed pressing plate and a movable pressing plate, a positioning guide rod is connected between the supporting frame and the fixed pressing plate, the movable pressing plate is in sliding fit with the positioning guide rod, heat exchange plates and sealing gaskets are arranged between the movable pressing plate and the fixed pressing plate, and the sealing gaskets are arranged between every two adjacent heat exchange plates; sealing grooves matched with the sealing gaskets are formed in the heat exchange plates, a plurality of positioning grooves and a plurality of supporting clamping grooves are formed in the edges of the heat exchange plates, the positioning grooves and the supporting clamping grooves communicate with the sealing grooves, and locking assemblies are arranged in the positioning grooves; the outer side of the sealing gasket is connected with a positioning piece and a side pressure supporting piece, the positioning piece is installed in the positioning groove and locked through a locking assembly, and the side pressure supporting piece is installed in the supporting clamping groove. The heat exchanger is simple in structure, easy to splice and assemble, good in sealing performance, good in heat exchange effect, high in pressure bearing capacity and long in service life.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of heat exchangers, and particularly relates to an assembled heat exchanger. BACKGROUND

[0002] A plate heat exchanger is defined as a heat exchanger whose heat transfer elements are made of heat exchange plates. The plate heat exchanger has the advantages of high heat transfer efficiency, low fouling coefficient, compact structure, small floor area, light weight, easy maintenance and cleaning, small terminal temperature difference, and easy change of heat exchange area and process combination. The plate heat exchanger is a device for heating, cooling and heat recovery of media in production processes, heating and refrigeration systems, and is widely used in power, metallurgy, steel, petroleum, chemical industry, food, pharmaceutical, shipbuilding, heating and ventilation, air conditioning, textile, papermaking and other industries. It is an excellent device for heating, cooling, heat recovery, rapid sterilization and other purposes. The heat exchange plate is a core component of the plate heat exchanger. Common plate types include herringbone corrugation, horizontal straight corrugation, spherical corrugation, inclined corrugation and vertical corrugation, among which the herringbone corrugation plate is the most widely used. In order to enhance the heat exchange effect of the plate heat exchanger, people have continuously researched and improved the structure of the heat exchange plate. Compared with traditional heat exchangers, the plate heat exchanger has a very compact structure; it is mostly made of aluminum alloy material and is very light; at the same time, due to the high thermal conductivity of the heat exchange plate, the plate heat exchanger has very high efficiency. The plate heat exchanger has strong adaptability and can be used for heat exchange between various fluids and phase change heat exchange that occurs during the condensation of a phase change; through the arrangement and combination of flow channels, it can adapt to different heat exchange conditions such as counterflow, crossflow, multiple streams and multiple passes; through the combination of series connection, parallel connection and series-parallel connection between units, it can meet the heat exchange needs of large-scale equipment.

[0003] The sealing gasket is a sealing element of the heat exchange plate. The plate heat exchanger realizes sealing between the heat exchange plates through the sealing gasket, prevents leakage of the fluid, can withstand a certain pressure, and allows two kinds of media to flow through their own flow channels without mixing. The working temperature of the plate heat exchanger is mostly determined by the temperature that the sealing gasket can withstand, and the working pressure of the plate heat exchanger is also restricted by the sealing gasket. The cross-sectional structure of the sealing gasket also has a certain influence on the reliability of pressure bearing. For example, Chinese patent document CN216977623U discloses a heat exchanger, which relates to the technical field of heat exchangers. The heat exchanger comprises a first end plate, a second end plate, a first plate, a second plate, a first sealing ring and a second sealing ring. The first plate and the second plate are provided in multiple, and the first plate and the second plate are sequentially and spaced apart along the first direction between the first end plate and the second end plate. The first plate and the second plate are provided with a first through hole for the first medium to flow in, a second through hole for the first medium to flow out, a third through hole for the second medium to flow in, and a fourth through hole for the second medium to flow out. Two first sealing rings and one second sealing ring are arranged between adjacent first plates and second plates.

[0004] In existing technologies, the gaskets of plate heat exchangers are often directly snapped into the sealing groove. The gaskets are made of elastic materials, which has the disadvantage of poor positioning. During the assembly of heat exchange plates, the gaskets are prone to displacement and deviation from the sealing groove due to uneven force, resulting in a decrease in the sealing function of the gaskets. In addition, when the plate heat exchanger is in use, the gaskets are also subjected to the lateral pressure of the heat exchange fluid, which can easily cause them to slide between the two heat exchange plates. This reduces the overall pressure bearing capacity of the plate heat exchanger, leading to leakage problems and reducing the service life of the plate heat exchanger. Summary of the Invention

[0005] The purpose of this invention is to provide a modular heat exchanger to solve the aforementioned problems existing in the prior art.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a prefabricated heat exchanger, comprising a support frame, a fixed pressure plate, and a movable pressure plate. A positioning guide rod is connected between the support frame and the fixed pressure plate. The movable pressure plate is slidably engaged with the positioning guide rod. A heat exchange plate and a sealing gasket are provided between the movable pressure plate and the fixed pressure plate. The sealing gasket is disposed between two adjacent heat exchange plates. A sealing groove adapted to the sealing gasket is formed on the heat exchange plate. Several positioning grooves and several support slots are formed on the edge of the heat exchange plate. The positioning grooves and support slots are all connected to the sealing grooves. A locking component is provided in the positioning groove. A positioning element and a side pressure support element are connected to the outside of the sealing gasket. The positioning element is installed in the positioning groove and locked by the locking component. The side pressure support element is installed in the support slot.

[0007] This invention employs the aforementioned technical solution, utilizing a positioning groove to position the positioning component and simultaneously locking it with a locking assembly. This improves the positioning and fixing effect of the sealing gasket, effectively solving the problem in existing technologies where poor positioning during assembly leads to gasket misalignment and deviation from the sealing groove, resulting in a decrease in the gasket's sealing function. Furthermore, the support grooves on the edges of the heat exchange plates fix the side pressure support component, providing lateral support to the sealing gasket and increasing its lateral pressure resistance. This effectively solves the problem in existing technologies where the sealing gasket slips under lateral pressure, leading to heat exchanger leakage. The heat exchanger of this invention has a simple structure, is easy to assemble, has good sealing performance, excellent heat exchange efficiency, strong pressure resistance, and a long service life.

[0008] As an optional implementation of the above technical solution, the locking assembly includes a spring and a locking head. One end of the spring is fixed in the positioning groove, and the other end of the spring is connected to the locking head. The locking head is used to contact the positioning element and lock it.

[0009] This invention employs the aforementioned technical solution. When the positioning component is not installed in the positioning groove, the locking head extends partially out of the transverse sealing groove under the action of the spring. During installation, the positioning component is pressed into the positioning groove, and the positioning component applies pressure to the spring through the locking head. The spring is compressed, and then the locking head secures the positioning component, preventing the gasket from moving. This invention utilizes a spring and locking head design, which enables both a "click"-like rapid positioning feedback for the gasket and a self-locking function for the gasket, improving the assembly efficiency of the heat exchanger.

[0010] As an optional implementation of the above technical solution, the positioning groove is provided with two locking heads, each of which is connected to a spring, and the positioning element is clamped between the two locking heads.

[0011] As an optional implementation of the above technical solution, the end of the locking head away from the spring has an arc-shaped structure.

[0012] As an optional implementation of the above technical solution, the inner wall of the positioning groove is provided with a transverse sealing groove, the transverse sealing groove is perpendicular to the positioning groove, and the spring is disposed in the transverse sealing groove.

[0013] As an optional implementation of the above technical solution, the positioning component includes a positioning block and a locking block. One end of the locking block is connected to a sealing gasket, and the other end of the locking block is connected to the positioning block. The surface of the locking block is provided with a locking groove that is adapted to the locking head.

[0014] This invention employs the aforementioned technical solution, where the positioning block, locking block, and sealing gasket are integrally molded. A locking groove is provided on the surface of the locking block to facilitate the insertion of the locking head, thereby improving the fixing effect of the locking block. This invention also features a positioning block and a locking block on the outer side of the sealing gasket. The positioning block and locking block are positioned via the positioning groove, while the locking block is locked by a spring and a locking head, making the sealing gasket less prone to loosening and falling off, thus achieving a good sealing effect.

[0015] As an optional implementation of the above technical solution, the cross-section of the positioning block is trapezoidal, and the cross-section of the locking block is rectangular.

[0016] As an optional embodiment of the above technical solution, the side pressure support includes a side pressure support block with a rectangular cross-section, and the side pressure support block and the positioning member are spaced apart on the outside of the sealing gasket.

[0017] The present invention adopts the above-mentioned technical solution. The side pressure support block is installed in the support slot and also has a positioning function. Since the cross-section of the side pressure support block is rectangular, it can provide a certain support for the outside of the sealing gasket, avoid the sealing gasket from sliding between the two heat exchange plates and causing leakage, and improve the overall pressure bearing capacity of the heat exchanger.

[0018] As an optional implementation of the above technical solution, the heat exchange plate is provided with four inlet and outlet corner holes, a flow guiding area is provided in the middle of the heat exchange plate, and a flow diversion area is provided at both ends of the flow guiding area.

[0019] As an optional implementation of the above technical solution, the periphery of the inlet / outlet corner hole is provided with a guide protrusion.

[0020] As an optional implementation of the above technical solution, the flow guiding area is provided with multiple herringbone-shaped ridges, and a flow guiding groove is provided between adjacent herringbone-shaped ridges.

[0021] The present invention adopts the above-mentioned technical solution, in which the herringbone pattern guides the fluid to flow between the heat exchange plates, so that the fluid forms an irregular path. The irregular path helps to generate turbulence, thereby increasing the contact area and contact time of the fluid between the heat exchange plates and improving the heat transfer efficiency.

[0022] As an optional implementation of the above technical solution, the diversion area is provided with multiple diversion blocks, and a diversion groove is provided between two adjacent diversion blocks.

[0023] As an optional implementation of the above technical solution, the positioning guide rod includes an upper guide rod and a lower guide rod. Both the upper guide rod and the lower guide rod are connected to the support frame and the fixed pressure plate. The two ends of the heat exchange plate are respectively provided with an upper guide port and a lower guide port. The upper guide port is slidably engaged with the upper guide rod, and the lower guide port is slidably engaged with the lower guide rod.

[0024] The beneficial effects of this invention are as follows: This invention features positioning grooves and support grooves on the edges of the heat exchange plates, and positioning elements and side-pressure supports on the outer side of the gasket. The positioning grooves position the positioning elements, while a locking assembly locks them in place, improving the positioning and fixing effect of the gasket. This effectively solves the problem in existing technologies where poor positioning during assembly leads to gasket misalignment and deviation from the sealing groove, resulting in reduced sealing performance. Furthermore, the support grooves on the edges of the heat exchange plates fix the side-pressure supports, providing lateral support to the gasket and increasing its lateral pressure resistance. This effectively solves the problem in existing technologies where gaskets slide under lateral pressure, leading to heat exchanger leakage. The heat exchanger of this invention has a simple structure, is easy to assemble, has good sealing performance, excellent heat exchange efficiency, strong pressure resistance, and a long service life. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of an assembled heat exchanger in one embodiment of the present invention; Figure 2This is a schematic diagram of the structure of the heat exchange plate in one embodiment of the present invention; Figure 3 This is a schematic diagram of the structure of a sealing gasket in one embodiment of the present invention; Figure 4 This is a schematic diagram of the locking component in one embodiment of the present invention.

[0026] In the diagram: 1-Support frame; 2-Fixed pressure plate; 3-Modible pressure plate; 4-Heat exchange plate; 5-Sealing gasket; 6-Sealing groove; 7-Positioning groove; 8-Support slot; 9-Spring; 10-Locking head; 11-Transverse sealing groove; 12-Positioning block; 13-Locking block; 14-Side pressure support block; 15-Inlet / outlet corner hole; 16-Guide convex strip; 17-Herringbone convex pattern; 18-Diverter block; 19-Upper guide rod; 20-Lower guide rod; 21-Upper guide port; 22-Lower guide port. Detailed Implementation

[0027] like Figures 1-4 As shown, this embodiment provides a prefabricated heat exchanger, including a support frame 1, a fixed pressure plate 2, and a movable pressure plate 3. A positioning guide rod is connected between the support frame 1 and the fixed pressure plate 2. The movable pressure plate 3 is slidably engaged with the positioning guide rod. Heat exchange plates 4 and sealing gaskets 5 are provided between the movable pressure plate 3 and the fixed pressure plate 2. The sealing gaskets 5 are placed between two adjacent heat exchange plates 4 to achieve sealing between the two heat exchange plates 4. The fixed pressure plate 2 is provided with a heat flow inlet pipe, a heat flow outlet pipe, a cold flow inlet pipe, and a cold flow outlet pipe. The heat flow inlet pipe is used to supply heat flow input, and the heat flow is discharged from the heat flow outlet pipe after heat exchange is completed inside the heat exchanger. The cold flow inlet pipe is used to supply cold flow input, and the cold flow is discharged from the cold flow outlet pipe after heat exchange is completed inside the heat exchanger.

[0028] like Figure 1 As shown, the positioning guide rod includes an upper guide rod 19 and a lower guide rod 20. Both the upper guide rod 19 and the lower guide rod 20 are fixedly connected to the support frame 1 and the fixed pressure plate 2. The upper and lower ends of the movable pressure plate 3 are slidably engaged with the upper guide rod 19 and the lower guide rod 20, respectively. The heat exchange plates 4 are provided with an upper guide port 21 and a lower guide port 22 at their respective ends. The upper guide port 21 is slidably engaged with the upper guide rod 19, and the lower guide port 22 is slidably engaged with the lower guide rod 20. The heat exchange plates 4 are installed one by one between the support frame 1 and the fixed pressure plate 2. The movable pressure plate 3 is used to press the heat exchange plates 4 together. The movable pressure plate 3 is fixed to the fixed pressure plate 2 with screws and nuts. The sealing function is achieved between two adjacent heat exchange plates 4 through a sealing gasket 5.

[0029] like Figure 2As shown, the heat exchange plate 4 has a sealing groove 6 adapted to the sealing gasket 5. The sealing groove 6 is annular, and the sealing gasket 5 is installed in the sealing groove 6. Several positioning grooves 7 and several support slots 8 are formed on the edge of the heat exchange plate 4. Both the positioning grooves 7 and the support slots 8 communicate with the sealing groove 6. A locking component is provided in the positioning groove 7. A positioning element and a side pressure support element are connected to the outside of the sealing gasket 5. The positioning element is installed in the positioning groove 7 and locked by the locking component. The side pressure support element is installed in the support slot 8. During assembly, the sealing gasket 5 is first installed in the sealing groove 6, and the positioning element is installed in the positioning groove 7. The positioning element is locked by the locking component to prevent the sealing gasket 5 from moving. The side pressure support element is installed in the support slot 8 to increase the side pressure bearing capacity of the sealing gasket 5 and prevent the sealing gasket 5 from sliding between the two heat exchange plates 4.

[0030] This invention features a positioning groove 7 and a support groove 8 on the edge of the heat exchange plate 4, and a positioning element and a side pressure support element on the outer side of the sealing gasket 5. The positioning groove 7 positions the positioning element, and a locking assembly locks it, improving the positioning and fixing effect of the sealing gasket 5. This effectively solves the problem in the prior art where the sealing gasket 5 shifts or deviates from the sealing groove 6 due to poor positioning during assembly, leading to a decrease in the sealing function of the sealing gasket 5. Furthermore, the support groove 8 on the edge of the heat exchange plate 4 fixes the side pressure support element, providing lateral support to the sealing gasket 5 and increasing its lateral pressure resistance. This effectively solves the problem in the prior art where the sealing gasket 5 slides under lateral pressure, leading to leakage in the heat exchanger. The heat exchanger of this invention has a simple structure, is easy to assemble, has good sealing performance, excellent heat exchange effect, strong pressure resistance, and a long service life.

[0031] like Figure 4As shown, in this embodiment, the locking assembly includes a spring 9 and a locking head 10. One end of the spring 9 is fixed in the positioning groove 7, and the other end of the spring 9 is connected to the locking head 10. The locking head 10 is used to contact and lock the positioning member, preventing the positioning member from disengaging from the positioning groove 7. Preferably, two locking heads 10 are provided in the positioning groove 7, each of which is connected to the spring 9, and the positioning member is clamped between the two locking heads 10. Further, the end of the locking head 10 away from the spring 9 has an arc-shaped structure. The inner wall of the positioning groove 7 is provided with a transverse sealing groove 11, which is perpendicular to the positioning groove 7. The spring 9 is disposed in the transverse sealing groove 11. When the positioning member is not installed in the positioning groove 7, the locking head 10 extends partly out of the transverse sealing groove 11 under the action of the spring 9. When the positioning member is installed, the positioning member is pressed into the positioning groove 7, and the positioning member applies pressure to the spring 9 through the locking head 10. The spring 9 is compressed, and then the locking head 10 presses and fixes the positioning member to prevent the sealing gasket 5 from moving. The present invention adopts a structural design of spring 9 and locking head 10, which can realize the "click" type quick positioning feedback of sealing gasket 5 and the self-locking function of sealing gasket 5, thereby improving the assembly efficiency of heat exchanger.

[0032] like Figure 3 As shown, in one specific embodiment, the positioning element includes a positioning block 12 and a locking block 13. One end of the locking block 13 is connected to the sealing gasket 5, and the other end of the locking block 13 is connected to the positioning block 12. The surface of the locking block 13 is provided with a locking groove adapted to the locking head 10. Preferably, the cross-section of the positioning block 12 is trapezoidal, and the cross-section of the locking block 13 is rectangular. The positioning block 12, the locking block 13, and the sealing gasket 5 are integrally formed. The locking groove on the surface of the locking block 13 facilitates the insertion of the locking head 10 and improves the fixing effect of the locking block 13. In this invention, the positioning block 12 and the locking block 13 are provided on the outside of the sealing gasket 5. The positioning block 12 and the locking block 13 are positioned by the positioning groove 7, and the locking block 13 is locked by the spring 9 and the locking head 10, making the sealing gasket 5 less prone to loosening and falling off, thus achieving a good sealing effect.

[0033] In one specific embodiment, the side pressure support includes a side pressure support block 14 with a rectangular cross-section. The side pressure support block 14 and the positioning element are spaced apart on the outside of the sealing gasket 5. The side pressure support block 14 is engaged in the support groove 8 and also has a positioning function. Since the side pressure support block 14 has a rectangular cross-section, it can provide a certain support for the outside of the sealing gasket 5, preventing the sealing gasket 5 from sliding between the two heat exchange plates 4 and causing leakage, thereby improving the overall pressure bearing capacity of the heat exchanger.

[0034] like Figure 2As shown, in one specific embodiment, the heat exchange plate 4 is provided with four inlet and outlet corner holes 15. A flow guiding zone is provided in the middle of the heat exchange plate 4, and flow splitting zones are provided at both ends of the flow guiding zone. The four inlet and outlet corner holes 15 are respectively a heat flow inlet hole, a heat flow outlet hole, a cold flow inlet hole, and a cold flow outlet hole. The heat flow inlet hole is connected to the heat flow inlet pipe to realize the heat flow input function; the heat flow outlet hole is connected to the heat flow outlet pipe to realize the heat flow output function; the cold flow inlet hole is connected to the cold flow inlet pipe to realize the cold flow input function; and the cold flow outlet hole is connected to the cold flow outlet pipe to realize the cold flow output function. This invention utilizes the four inlet and outlet corner holes 15 connected to the heat flow inlet pipe, heat flow outlet pipe, cold flow inlet pipe, and cold flow outlet pipe respectively to achieve heat exchange between the heat exchange plate 4. To facilitate the flow guidance of the heat and cold flow, flow guiding protrusions 16 are provided on the periphery of the inlet and outlet corner holes 15.

[0035] Preferably, the flow distribution zone has multiple flow distribution blocks 18, and a flow distribution groove is provided between two adjacent flow distribution blocks 18. The flow distribution blocks 18 are used to distribute the fluid, allowing it to flow along the flow distribution grooves, thereby improving the heat exchanger's heat transfer efficiency. The flow guiding zone has multiple herringbone-shaped ridges 17, and a flow guiding groove is provided between two adjacent herringbone-shaped ridges 17, which communicate with the flow distribution grooves. The herringbone-shaped ridges 17 guide the fluid to flow between the heat exchange plates 4, creating an irregular path for the fluid. This irregular path helps generate turbulence, thereby increasing the contact area and contact time of the fluid between the heat exchange plates 4, and improving heat transfer efficiency.

[0036] In the description of this invention, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. They can refer to fixed connections, detachable connections, or integral connections; they can be mechanical or electrical connections; they can be direct connections or indirect connections through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art will understand the specific meanings of these terms in this invention. Furthermore, the specific features and structures described in the embodiments are included in at least one implementation method. Those skilled in the art can combine features from different implementation methods without contradiction. The scope of protection of this invention is not limited to the specific implementation methods described above. Based on the basic technical concept of this invention, implementation methods that can be conceived by those skilled in the art without creative effort are all within the scope of protection of this invention.

Claims

1. A prefabricated heat exchanger, comprising a support frame (1), a fixed pressure plate (2), and a movable pressure plate (3), wherein a positioning guide rod is connected between the support frame (1) and the fixed pressure plate (2), the movable pressure plate (3) is slidably engaged with the positioning guide rod, and heat exchange plates (4) and a sealing gasket (5) are provided between the movable pressure plate (3) and the fixed pressure plate (2), wherein the sealing gasket (5) is disposed between two adjacent heat exchange plates (4); characterized in that, The heat exchange plate (4) is provided with a sealing groove (6) that is compatible with the sealing gasket (5). The edge of the heat exchange plate (4) is provided with a number of positioning grooves (7) and a number of support slots (8). The positioning grooves (7) and support slots (8) are connected to the sealing grooves (6). The positioning grooves (7) are provided with locking components. The outer side of the sealing gasket (5) is connected with a positioning member and a side pressure support member. The positioning member is installed in the positioning groove (7) and locked by the locking component. The side pressure support member is installed in the support slot (8).

2. The assembled heat exchanger according to claim 1, characterized in that, The locking assembly includes a spring (9) and a locking head (10). One end of the spring (9) is fixed in the positioning groove (7), and the other end of the spring (9) is connected to the locking head (10). The locking head (10) is used to contact the positioning element and lock it.

3. The assembled heat exchanger according to claim 2, characterized in that, The positioning groove (7) is provided with two locking heads (10), each locking head (10) is connected to a spring (9), and the positioning member is clamped between the two locking heads (10).

4. The assembled heat exchanger according to claim 2, characterized in that, The locking head (10) has an arc-shaped structure at the end away from the spring (9); the inner wall of the positioning groove (7) is provided with a transverse sealing groove (11), the transverse sealing groove (11) is perpendicular to the positioning groove (7), and the spring (9) is set in the transverse sealing groove (11).

5. The assembled heat exchanger according to claim 2, characterized in that, The positioning component includes a positioning block (12) and a locking block (13). One end of the locking block (13) is connected to the sealing gasket (5), and the other end of the locking block (13) is connected to the positioning block (12). The surface of the locking block (13) is provided with a locking groove that is adapted to the locking head (10).

6. The assembled heat exchanger according to claim 5, characterized in that, The cross-section of the positioning block (12) is trapezoidal, and the cross-section of the locking block (13) is rectangular.

7. The assembled heat exchanger according to claim 1, characterized in that, The side pressure support includes a side pressure support block (14) with a rectangular cross-section, and the side pressure support block (14) and the positioning element are spaced apart on the outside of the sealing gasket (5).

8. The assembled heat exchanger according to claim 1, characterized in that, The heat exchange plate (4) is provided with four inlet and outlet corner holes (15), and a flow guiding area is provided in the middle of the heat exchange plate (4), and a flow diversion area is provided at both ends of the flow guiding area.

9. The assembled heat exchanger according to claim 8, characterized in that, The periphery of the inlet / outlet corner hole (15) is provided with a flow guide ridge (16); the flow guide area is provided with multiple herringbone ridges (17), and a flow guide groove is provided between adjacent herringbone ridges (17); the flow diversion area is provided with multiple flow diversion blocks (18), and a flow diversion groove is provided between adjacent flow diversion blocks (18).

10. The assembled heat exchanger according to claim 1, characterized in that, The positioning guide rod includes an upper guide rod (19) and a lower guide rod (20). The upper guide rod (19) and the lower guide rod (20) are both connected to the support frame (1) and the fixed pressure plate (2). The heat exchange plate (4) has an upper guide port (21) and a lower guide port (22) at both ends. The upper guide port (21) is slidably engaged with the upper guide rod (19), and the lower guide port (22) is slidably engaged with the lower guide rod (20).

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