A plate heat exchanger

Abstract

This invention discloses a plate heat exchanger, comprising a base plate, a lower left plate fixedly connected to one side of the top of the base plate, a left cover plate fixedly connected to the top of the lower left plate, an upper left plate fixedly connected to the top of the left cover plate, a lower right plate slidably connected to the other side of the top of the base plate, a right cover plate fixedly connected to the top of the lower right plate, and an upper right plate fixedly connected to the top of the right cover plate. This invention eliminates the need for a sealing gasket sandwiched between two heat exchange plates in existing technologies to separate the flow of cold and hot liquids. Instead, it redesigns a special heat exchange profile, using a plate with a left heat exchange plate and a right heat exchange plate fixed to both sides of the inner wall of the plate. This creates a cold liquid chamber between the assembled special heat exchange profiles, and the hot liquid chambers within the special heat exchange profiles automatically connect. The sealing gasket and sealing ring only serve to prevent leakage.

Description

Technical Field

[0001] This invention relates to the field of heat exchanger technology, and more specifically to a plate heat exchanger. Background Technology

[0002] A plate heat exchanger is a high-efficiency heat exchanger composed of a series of corrugated metal plates stacked together. Thin rectangular channels are formed between the plates, through which heat exchange occurs. Plate heat exchangers are ideal for liquid-liquid and liquid-vapor heat exchange. They feature high heat exchange efficiency, low heat loss, compact and lightweight structure, small footprint, wide application, and long service life. Under the same pressure loss conditions, their heat transfer coefficient is 3-5 times higher than that of a tubular heat exchanger, their footprint is one-third that of a tubular heat exchanger, and their heat recovery rate can reach over 90%.

[0003] Currently, commercially available plate heat exchangers typically use metal heat exchange plates clamping gaskets for flow guidance. This clamping requires significant pressure to prevent deformation of the gaskets when liquid enters between them, which could lead to external leakage or cross-contamination. The gaskets have a short lifespan and require specialized materials, resulting in higher costs. Furthermore, replacing the metal heat exchange plates or gaskets requires complete disassembly; partial disassembly is not possible. This cumbersome process also causes all the liquid inside the heat exchanger to leak out, making cleaning difficult.

[0004] Therefore, it is necessary to invent a plate heat exchanger to solve the above problems.

[0005] The information disclosed in the background section is only intended to enhance the understanding of the background of this disclosure, and therefore may include information that does not constitute prior art known to those skilled in the art. Summary of the Invention

[0006] The purpose of this invention is to provide a plate heat exchanger that uses specially designed heat exchange profiles to replace the combination of heat exchange plates and sealing gaskets in the prior art, and is combined with a positioning device to solve the above-mentioned shortcomings of the technology.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a plate heat exchanger, comprising a base plate, a lower left plate fixedly connected to one side of the top of the base plate, a left cover plate fixedly connected to the top of the lower left plate, an upper left plate fixedly connected to the top of the left cover plate, a lower right plate slidably connected to the other side of the top of the base plate, a right cover plate fixedly connected to the top of the lower right plate, an upper right plate fixedly connected to the top of the right cover plate, and a specially designed heat exchange profile provided between the left cover plate and the right cover plate, wherein the top and bottom of the specially designed heat exchange profile are provided with multiple positioning devices.

[0008] The specially designed heat exchange profile includes a heat-insulating plate. A left heat exchange fin is fixedly connected to one side of the inner wall of the plate, and a right heat exchange fin is fixedly connected to the other side of the inner wall of the plate. A first sealing gasket is slidably connected to the outside of the right heat exchange fin. A connecting pipe is fixedly connected between the left and right heat exchange fins. A left heat exchange fin hot liquid pipe is fixedly connected to the side of the left heat exchange fin away from the right heat exchange fin. A hot liquid inlet hole is opened on the side of the right heat exchange fin away from the left heat exchange fin. A first sealing ring is placed inside the hot liquid inlet hole. Folding strips are fixedly connected to both sides of the outer walls of the left and right heat exchange fins. Positioning blocks are fixedly connected to the top and bottom of the plate. Two symmetrically distributed positioning holes are opened on the side of the positioning block away from the plate.

[0009] The positioning device includes a lower positioning strip slidably connected to the base plate, a lower positioning rod fixedly connected to the top of the lower positioning strip, and lower insertion holes on both sides of the outer walls of the lower positioning strip, the lower left plate, and the lower right plate. A first rod is provided on the top of the cover plate, and two symmetrically distributed upper positioning rods are fixedly connected through and inside the first rod. An upper positioning strip is slidably connected to the end of the upper positioning rod away from the cover plate. A second rod is fixedly connected to the end of the upper positioning rod that passes through the upper positioning strip. Two symmetrically distributed springs are fixedly connected between the upper positioning strip and the first rod. A handle is fixedly connected to the top of the second rod. Two symmetrically distributed sliding grooves pass through the upper and lower positioning strips. An upper insertion hole is provided on the top of the second rod, the upper left plate, and the upper right plate. A U-shaped tube is slidably connected inside the upper and lower insertion holes.

[0010] Preferably, a left hot liquid pipe is fixedly connected to the left cover plate near the right cover plate, a second sealing ring is placed at the end of the left hot liquid pipe away from the left cover plate, a left cold liquid hole is opened inside the left cover plate, and a second sealing gasket is placed on the left cover plate near the right cover plate.

[0011] Preferably, a right hot liquid pipe is fixedly connected to the right cover plate near the left cover plate, and a right cold liquid hole is opened inside the right cover plate.

[0012] Preferably, four sliding rods are fixedly connected to the lower left plate and the upper left plate on the side near the lower right plate, and the upper right plate, the lower right plate, and the sliding groove are all slidably connected to the sliding rods.

[0013] Preferably, the side of the left cover plate where the second sealing gasket is placed and the side of the right heat exchange plate where the first sealing gasket is placed are both slidably connected to the inner wall of the cover plate, and the inner wall of the right cover plate is slidably connected to the side of the right heat exchange plate where the first sealing gasket is placed.

[0014] The technical effects and advantages provided by the present invention in the above technical solution are as follows:

[0015] 1. This plate heat exchanger eliminates the need for a sealing gasket clamped between two heat exchange plates in existing technologies to separate the flow of cold and hot liquids. Instead, a specially designed heat exchange profile is used, with a left heat exchange plate and a right heat exchange plate fixed to the inner walls of the plate. This creates a cold liquid chamber between the assembled profiles, while the hot liquid chambers within the profiles automatically connect. The sealing gasket and sealing ring only serve to prevent leakage, thus reducing the clamping force on the gasket, extending its service life, and decreasing the frequency of replacement. Furthermore, since the gasket does not participate in flow guidance, the shape requirements for the gasket are reduced. Simultaneously, the plate can be made of a material with good insulation properties, reducing heat loss and further improving the insulation effect.

[0016] 2. The positioning device allows for easy replacement of the special heat exchange profile. Simply pull the corresponding U-shaped tube out of the upper and lower insertion holes to separate the fixed profile. Then, pull the handle upwards to remove the profile. This eliminates the need for the previous method of slowly unscrewing all nuts, draining all water, moving and removing the heat exchange plates or gaskets, and then tightening the nuts again. This device only requires disassembling the specific area, making replacement convenient and simple. Furthermore, only a small portion of the water leaks out, making cleaning easy. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 This is a first-view schematic diagram of the partial connection of the present invention;

[0020] Figure 3 This is a schematic diagram of the partial connection of the present invention from a second perspective;

[0021] Figure 4 This is a first-view perspective perspective view of the specially designed heat exchange profile of the present invention;

[0022] Figure 5 This is a second-view perspective perspective view of the specially designed heat exchange profile of the present invention;

[0023] Figure 6 This is a perspective view of the positioning device of the present invention;

[0024] Figure 7 For the present invention Figure 1 Enlarged view of the A-section structure;

[0025] Figure 8 For the present invention Figure 1 Enlarged view of the structure of section B;

[0026] Figure 9 This is a first-view schematic diagram of liquid flow according to the present invention;

[0027] Figure 10 This is a second-view schematic diagram of liquid flow according to the present invention.

[0028] Explanation of reference numerals in the attached figures:

[0029] 1. Base plate, 2. Lower left plate, 3. Left cover plate, 4. Upper left plate, 5. Lower right plate, 6. Right cover plate, 7. Upper right plate, 8. Special heat exchange profile, 9. Positioning device, 10. Encasing plate, 11. Left heat exchange plate, 12. Right heat exchange plate, 13. First sealing gasket, 14. Connecting pipe, 15. Left hot liquid pipe, 16. Hot liquid inlet hole, 17. First sealing ring, 18. Folding strip, 19. Positioning block, 20. Positioning hole, 21. Lower positioning strip, 22. Lower positioning rod, 23. Lower insertion hole, 24. First rod, 25. Upper positioning rod, 26. Upper positioning strip, 27. Second rod, 28. Spring, 29. Handle, 30. Slide groove, 31. Upper insertion hole, 32. U-shaped tube, 33. Left hot liquid pipe, 34. Second sealing ring, 35. Left cold liquid hole, 36. Second sealing gasket, 37. Right hot liquid pipe, 38. Right cold liquid hole, 39. Slide rod. Detailed Implementation

[0030] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, they are provided so that the description of this disclosure will be more complete and fully convey the concept of the exemplary embodiments to those skilled in the art. The drawings are merely illustrative of this disclosure and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and therefore repeated descriptions of them will be omitted.

[0031] Furthermore, the described features, structures, or characteristics can be combined in any suitable manner in one or more exemplary embodiments. Numerous specific details are provided in the following description to give a full understanding of exemplary embodiments of this disclosure. However, those skilled in the art will recognize that the technical solutions of this disclosure can be practiced with one or more of the specific details omitted, or other methods, components, steps, etc., can be employed. In other instances, well-known structures, methods, implementations, or operations are not shown or described in detail to avoid obscuring various aspects of this disclosure.

[0032] This invention provides, for example Figure 1-10 The plate heat exchanger shown includes a base plate 1, a lower left plate 2 fixedly connected to one side of the top of the base plate 1, a left cover plate 3 fixedly connected to the top of the lower left plate 2, an upper left plate 4 fixedly connected to the top of the left cover plate 3, a lower right plate 5 slidably connected to the other side of the top of the base plate 1, a right cover plate 6 fixedly connected to the top of the lower right plate 5, an upper right plate 7 fixedly connected to the top of the right cover plate 6, and a special heat exchange profile 8 provided between the left cover plate 3 and the right cover plate 6. The special heat exchange profile 8 is provided with multiple positioning devices 9 at its top and bottom.

[0033] The specially designed heat exchange profile 8 includes a heat-insulating cover plate 10. A left heat exchange plate 11 is fixedly connected to one side of the inner wall of the cover plate 10, and a right heat exchange plate 12 is fixedly connected to the other side of the inner wall of the cover plate 10. A first sealing gasket 13 is slidably connected to the outside of the right heat exchange plate 12. A connecting pipe 14 is fixedly connected between the left heat exchange plate 11 and the right heat exchange plate 12. A left heat exchange pipe 15 is fixedly connected to the side of the left heat exchange plate 11 away from the right heat exchange plate 12. A heat inlet hole 16 is opened on the side of the right heat exchange plate 12 away from the left heat exchange plate 11. A first sealing ring 17 is placed inside the heat inlet hole 16. Folding strips 18 are fixedly connected to both sides of the outer wall of the left heat exchange plate 11 and the right heat exchange plate 12. Positioning blocks 19 are fixedly connected to the top and bottom of the cover plate 10. The positioning block 19 has two symmetrically distributed positioning holes 20 on the side away from the cover plate 10. The left heat exchange plate 11 and the right heat exchange plate 12 are fixed by the cover plate 10 in the special heat exchange profile 8, so that a hot liquid chamber is formed between the left heat exchange plate 11 and the right heat exchange plate 12. When the two special heat exchange profiles 8 are attached, a cold liquid chamber is formed between the left heat exchange plate 11 in one special heat exchange profile 8 and the right heat exchange plate 12 in the other special heat exchange profile 8. The cold liquid chambers are connected to each other by the connecting pipe 14. When the left plate hot liquid pipe 15 and the hot liquid inlet hole 16 are attached, the hot liquid chambers are connected to each other. The folding strip 18 causes turbulence when the liquid passes through, improving the heat exchange effect. The positioning holes 20 on the positioning block 19 facilitate the positioning of the special heat exchange profile 8.

[0034] The positioning device 9 includes a lower positioning strip 21 slidably connected to the base plate 1. A lower positioning rod 22 is fixedly connected to the top of the lower positioning strip 21. Lower insertion holes 23 are opened on both sides of the outer walls of the lower positioning strip 21, the lower left plate 2, and the lower right plate 5. A first rod 24 is provided on the top of the cover plate 10. Two symmetrically distributed upper positioning rods 25 are fixedly connected through the first rod 24. An upper positioning strip 26 is slidably connected to the end of the upper positioning rod 25 away from the cover plate 10. A second rod 27 is fixedly connected to the end of the upper positioning rod 25 that passes through the upper positioning strip 26. Two symmetrically distributed springs 28 are fixedly connected between the upper positioning strip 26 and the first rod 24. A handle 29 is fixedly connected to the top of the second rod 27. Two symmetrically distributed sliding grooves 30 are passed through the upper positioning strip 26 and the lower positioning strip 21. An upper insertion hole 31 is opened on the top of the second rod 27, the upper left plate 4, and the upper right plate 7. A U-shaped tube 32 is slidably connected inside the upper insertion hole 31 and the lower insertion hole 23. By first pulling the handle 29 upward, the handle 29 drives the first rod 24 to rise, and the first rod 24 drives the spring 28 to compress. Then, the special heat exchange profile 8 is moved between the upper positioning strip 26 and the lower positioning strip 21, so that the lower positioning rod 22 on the lower positioning strip 21 is inserted into the positioning hole 20 in the special heat exchange profile 8. Then, the handle 29 is released, and the spring 28 drives the first rod 24 to return to its original position. The first rod 24 drives the upper positioning rod 25 to be inserted into the positioning hole 20 above the cover plate 10, thus fixing the special heat exchange profile 8. Then, the fixed special heat exchange profile 8 is moved, thereby driving the upper positioning strip 26 to slide along the slide rod 39. When one special heat exchange profile 8 is in contact with another special heat exchange profile 8, the U-shaped tube 32 is inserted into the lower insertion hole 23 and the upper insertion hole 31 on the special heat exchange profile 8 to complete the fixing between the two special heat exchange profiles 8.

[0035] Furthermore, in the above technical solution, a left hot liquid pipe 33 is fixedly connected to the side of the left cover plate 3 near the right cover plate 6. A second sealing ring 34 is placed at the end of the left hot liquid pipe 33 away from the left cover plate 3. A left cold liquid hole 35 is opened inside the left cover plate 3. A second sealing gasket 34 is placed on the side of the left cover plate 3 near the right cover plate 6. When the special heat exchange profile 8 is attached to the left cover plate 3, the left hot liquid pipe 15 in the special heat exchange profile 8 is attached to the second sealing ring 34 on the left hot liquid pipe 33, so that the external hot liquid can enter the hot liquid chamber from the left hot liquid pipe 33.

[0036] Furthermore, in the above technical solution, a right hot liquid pipe 37 is fixedly connected to the right cover plate 6 on the side near the left cover plate 3. A right cold liquid hole 38 is opened inside the right cover plate 6. When the special heat exchange profile 8 is attached to the right cover plate 6, the cold liquid enters from the right cold liquid hole 38 and can flow into the cold liquid chamber, which facilitates heat exchange between the cold liquid and the hot liquid.

[0037] Furthermore, in the above technical solution, four sliding rods 39 are fixedly connected to the lower left plate 2 and the upper left plate 4 near the lower right plate 5. The upper right plate 7, the lower right plate 5, and the sliding groove 30 are all slidably connected to the sliding rods 39. The movement of the upper positioning rod 25 and the lower positioning rod 22 is limited by the four sliding rods 39, which facilitates the accurate fitting of the specially made heat exchange profiles 8 to each other, and enables the cover plate 10 to quickly fit with the first sealing gasket 13 and the second sealing gasket 34, so that the device will not leak liquid.

[0038] Furthermore, in the above technical solution, the side of the left cover plate 3 where the second sealing gasket 34 is placed and the side of the right heat exchange plate 12 where the first sealing gasket 13 is placed are both slidably connected to the inner wall of the cover plate 10. The inner wall of the right cover plate 6 is slidably connected to the side of the right heat exchange plate 12 where the first sealing gasket 13 is placed. Through the sliding connection between the cover plate 10 and the right cover plate 6, the cover plate 10 and the right cover plate 6 can clamp the first sealing gasket 13 or the second sealing gasket 34, so that the first sealing gasket 13 or the second sealing gasket 34 only plays the role of preventing leakage and does not need to participate in guiding the flow of liquid. Therefore, the compressive force on the first sealing gasket 13 or the second sealing gasket 34 can be reduced, the service life can be improved, frequent replacement is not required, and the material selection requirements are reduced, thus reducing the cost of use.

[0039] The specific implementation method is as follows:

[0040] Positioning steps for the special heat exchange profile 8: When installing the special heat exchange profile 8, first pull the handle 29 upwards. The handle 29 drives the second rod 27 to rise, the second rod 27 drives the upper positioning rod 25, the upper positioning rod 25 drives the first rod 24, and the first rod 24 drives the spring 28 to compress. Then move the special heat exchange profile 8 onto the lower positioning strip 21, so that the lower positioning rod 22 is inserted into the positioning hole 20 below the special heat exchange profile 8. Then release the handle 29, the spring 28 drives the upper positioning rod 25 to return to its original position, and the upper positioning rod 25 is inserted into the positioning hole 20 above the special heat exchange profile 8, so that the special heat exchange profile 8 is positioned between the upper positioning strip 26 and the lower positioning strip 21. Then rotate another special heat exchange profile 8 180° along the horizontal axis and repeat the above steps to install it between the upper positioning strip 26 and the lower positioning strip 21. Then position all the special heat exchange profiles 8 in sequence.

[0041] The fixing steps between the special heat exchange profiles 8 are as follows: After the special heat exchange profiles 8 are positioned, push the special heat exchange profiles 8 closer to each other along the slide bar 39 so that the cover plate 10 fits with the first sealing gasket 13 and the left hot liquid pipe 15 fits with the first sealing ring 17 on the hot liquid inlet hole 16. Then, insert the U-shaped tube 32 into the upper insertion hole 31 and the lower insertion hole 23 in the two special heat exchange profiles 8 to complete the fixing between the two special heat exchange profiles 8. At this time, the cold liquid chamber between the special heat exchange profiles 8 is connected through the connecting pipe 14, and the hot liquid chamber between the special heat exchange profiles 8 is connected through the left hot liquid pipe 15 and the hot liquid inlet hole 16.

[0042] The special heat exchange profile 8 is fixed to the left cover plate 3 and the right cover plate 6 respectively. The special heat exchange profile 8 is pushed along the slide bar 39 to approach the left cover plate 3, so that the cover plate 10 is in contact with the second sealing gasket 34, and the second sealing ring 34 on the left hot liquid pipe 33 is in contact with the left hot liquid pipe 15. Then, the right cover plate 6 is pushed along the slide bar 39 to approach the special heat exchange profile 8, so that the right cover plate 6 is in contact with the first sealing gasket 13. Then, the U-shaped tube 32 is inserted into the upper insertion hole 31 and the lower insertion hole 23 to complete the fixation between the left cover plate 3, the right cover plate 6 and the special heat exchange profile 8. At this time, hot liquid can enter from the left hot liquid pipe 33 and exit from the right hot liquid pipe 37, and cold liquid can enter from the right cold liquid hole 38 and exit from the left cold liquid hole 35.

[0043] Replacement steps for special heat exchange profile 8: When it is necessary to replace one of the special heat exchange profiles 8, simply pull out the corresponding U-shaped tubes 32 on both sides from the upper insertion hole 31 and the lower insertion hole 23, then pull up the corresponding handle 29 to remove the special heat exchange profile 8, and then perform the fixing steps between the special heat exchange profiles 8.

[0044] Technical effects and advantages: 1. This plate heat exchanger eliminates the existing technology of clamping a sealing gasket between two heat exchange plates for heat preservation and flow guidance to achieve separate flow of cold and hot liquids. Instead, a specially designed heat exchange profile 8 is used, with a left heat exchange plate 11 and a right heat exchange plate 12 fixed to the inner walls of the casing plate 10, forming a cold liquid chamber between the assembled special heat exchange profile 8. The hot liquid chambers within the special heat exchange profile 8 are automatically connected, and the sealing gasket and sealing ring only serve to prevent leakage. Therefore, the clamping force on the sealing gasket is reduced, the service life of the sealing gasket is increased, and the replacement frequency of the sealing gasket is reduced. Moreover, since it does not need to participate in flow guidance, the shape requirements of the sealing gasket are reduced. At the same time, the casing plate 10 can be made of materials with good heat preservation performance, reducing heat loss and further improving the heat preservation effect.

[0045] 2. The positioning device 9 allows for easy replacement of the special heat exchange profile 8. Simply pull the corresponding U-shaped tube 32 out of the upper insertion hole 31 and lower insertion hole 23 to separate the fixed special heat exchange profile 8. Then, pull up the handle 29 to remove the special heat exchange profile 8. This eliminates the need for the previous method of slowly unscrewing all nuts, draining all water, moving and removing the corresponding heat exchange plates or gaskets, and then tightening the nuts one by one after replacement, which required complete disassembly. This device only requires disassembly of the corresponding parts. This invention offers convenient replacement and simple operation, with only localized water outflow, making it easy to clean. Specifically, it addresses the problems of existing plate heat exchangers that typically use metal heat exchange plates to clamp sealing gaskets for flow guidance. This clamping requires strong pressure to prevent deformation of the gaskets when liquid enters between them, leading to external leakage or cross-contamination. Furthermore, the sealing gaskets have a short lifespan and require specialized gaskets, resulting in high costs. Additionally, replacing the metal heat exchange plates or gaskets requires complete disassembly, not partial disassembly, making the operation cumbersome and causing all the liquid inside the plate heat exchanger to flow out, making cleaning difficult.

[0046] Working principle of this invention:

[0047] Refer to the instruction manual appendix Figure 1-10 The positioning steps for the special heat exchange profile 8 are as follows: When installing the special heat exchange profile 8, first pull the handle 29 upward. The handle 29 drives the second rod 27 to rise, the second rod 27 drives the upper positioning rod 25, the upper positioning rod 25 drives the first rod 24, and the first rod 24 drives the spring 28 to compress. Then, move the special heat exchange profile 8 onto the lower positioning strip 21 so that the lower positioning rod 22 is inserted into the positioning hole 20 below the special heat exchange profile 8. After that, release the handle 29, and the spring 28 drives the upper positioning rod 25 to return to its original position. The upper positioning rod 25 is inserted into the positioning hole 20 above the special heat exchange profile 8, so that the special heat exchange profile 8 is positioned between the upper positioning strip 26 and the lower positioning strip 21. Then, rotate another special heat exchange profile 8 180° along the horizontal axis and repeat the above steps to install it between the upper positioning strip 26 and the lower positioning strip 21. After that, position all the special heat exchange profiles 8 in sequence.

[0048] The fixing steps between the special heat exchange profiles 8 are as follows: After the special heat exchange profiles 8 are positioned, push the special heat exchange profiles 8 closer to each other along the slide bar 39 so that the cover plate 10 fits with the first sealing gasket 13 and the left hot liquid pipe 15 fits with the first sealing ring 17 on the hot liquid inlet hole 16. Then, insert the U-shaped tube 32 into the upper insertion hole 31 and the lower insertion hole 23 in the two special heat exchange profiles 8 to complete the fixing between the two special heat exchange profiles 8. At this time, the cold liquid chamber between the special heat exchange profiles 8 is connected through the connecting pipe 14, and the hot liquid chamber between the special heat exchange profiles 8 is connected through the left hot liquid pipe 15 and the hot liquid inlet hole 16.

[0049] The special heat exchange profile 8 is fixed to the left cover plate 3 and the right cover plate 6 respectively. The special heat exchange profile 8 is pushed along the slide bar 39 to approach the left cover plate 3, so that the cover plate 10 is in contact with the second sealing gasket 34, and the second sealing ring 34 on the left hot liquid pipe 33 is in contact with the left hot liquid pipe 15. Then, the right cover plate 6 is pushed along the slide bar 39 to approach the special heat exchange profile 8, so that the right cover plate 6 is in contact with the first sealing gasket 13. Then, the U-shaped tube 32 is inserted into the upper insertion hole 31 and the lower insertion hole 23 to complete the fixation between the left cover plate 3, the right cover plate 6 and the special heat exchange profile 8. At this time, hot liquid can enter from the left hot liquid pipe 33 and exit from the right hot liquid pipe 37, and cold liquid can enter from the right cold liquid hole 38 and exit from the left cold liquid hole 35.

[0050] Replacement steps for special heat exchange profile 8: When it is necessary to replace one of the special heat exchange profiles 8, simply pull out the corresponding U-shaped tubes 32 on both sides from the upper insertion hole 31 and the lower insertion hole 23, then pull up the corresponding handle 29 to remove the special heat exchange profile 8, and then perform the fixing steps between the special heat exchange profiles 8.

[0051] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

[0052] Finally, the following points should be noted: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection", and "linkage" should be interpreted broadly, and can be mechanical or electrical connections, or internal connections between two components, or direct connections. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may change.

[0053] Secondly, the accompanying drawings of the embodiments disclosed in this invention only involve the structures involved in the embodiments disclosed in this invention. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this invention can be combined with each other.

[0054] Finally, the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A plate heat exchanger, comprising a base plate (1), characterized in that: The bottom plate (1) is fixedly connected to the lower left plate (2) on one side of the top. The lower left plate (2) is fixedly connected to the top of the left cover plate (3). The upper left plate (4) is fixedly connected to the top of the left cover plate (3). The bottom right plate (5) is slidably connected to the other side of the top of the bottom plate (1). The lower right plate (5) is fixedly connected to the top of the right cover plate (5). The upper right plate (7) is fixedly connected to the top of the right cover plate (6). A special heat exchange profile (8) is provided between the left cover plate (3) and the right cover plate (6). The special heat exchange profile (8) is provided with multiple positioning devices (9) at the top and bottom. The specially designed heat exchange profile (8) includes a heat-insulating cover plate (10). A left heat exchange plate (11) is fixedly connected to one side of the inner wall of the cover plate (10), and a right heat exchange plate (12) is fixedly connected to the other side of the inner wall of the cover plate (10). A first sealing gasket (13) is slidably connected to the outside of the right heat exchange plate (12). A connecting pipe (14) is fixedly connected between the left heat exchange plate (11) and the right heat exchange plate (12). A connecting pipe (14) is fixedly connected to the side of the left heat exchange plate (11) away from the right heat exchange plate (12). The left heat exchanger tube (15) has a heat inlet hole (16) on the side of the right heat exchanger (12) away from the left heat exchanger (11). A first sealing ring (17) is placed inside the heat inlet hole (16). Folding strips (18) are fixedly connected to both sides of the outer wall of the left heat exchanger (11) and the right heat exchanger (12). Positioning blocks (19) are fixedly connected to the top and bottom of the cover plate (10). Two symmetrically distributed positioning holes (20) are opened on the side of the positioning block (19) away from the cover plate (10). The positioning device (9) includes a lower positioning strip (21) slidably connected to the base plate (1). A lower positioning rod (22) is fixedly connected to the top of the lower positioning strip (21). Lower insertion holes (23) are opened on both sides of the outer walls of the lower positioning strip (21), the lower left plate (2), and the lower right plate (5). A first rod (24) is provided on the top of the cover plate (10). Two symmetrically distributed upper positioning rods (25) are fixedly connected inside the first rod (24). An upper positioning strip (26) is slidably connected to the end of the upper positioning rod (25) away from the cover plate (10). 5) A second rod (27) is fixedly connected to one end of the upper positioning strip (26). Two symmetrically distributed springs (28) are fixedly connected between the upper positioning strip (26) and the first rod (24). A handle (29) is fixedly connected to the top of the second rod (27). Two symmetrically distributed sliding grooves (30) pass through the interior of the upper positioning strip (26) and the lower positioning strip (21). The top of the second rod (27), the upper left plate (4), and the upper right plate (7) are all provided with upper insertion holes (31). U-shaped tubes (32) are slidably connected inside the upper insertion holes (31) and the lower insertion holes (23).

2. A plate heat exchanger according to claim 1, characterized in that: A left hot liquid pipe (33) is fixedly connected to the left cover plate (3) near the right cover plate (6). A second sealing ring (34) is placed at the end of the left hot liquid pipe (33) away from the left cover plate (3). A left cold liquid hole (35) is opened inside the left cover plate (3). A second sealing gasket (34) is placed on the left cover plate (3) near the right cover plate (6).

3. A plate heat exchanger according to claim 1, characterized in that: The right cover plate (6) is fixedly connected to the right hot liquid pipe (37) on the side near the left cover plate (3), and the right cover plate (6) has a right cold liquid hole (38) inside.

4. A plate heat exchanger according to claim 1, characterized in that: The lower left plate (2) and the upper left plate (4) are fixedly connected to four sliding rods (39) on the side near the lower right plate (5). The lower insertion hole (23) extends to one side of the outer wall of the sliding rod (39). The upper right plate (7), the lower right plate (5) and the sliding groove (30) are all slidably connected to the sliding rod (39).

5. A plate heat exchanger according to claim 2, characterized in that: The side of the left cover plate (3) on which the second sealing gasket (36) is placed and the side of the right heat exchange plate (12) on which the first sealing gasket (13) is placed are both slidably connected to the inner wall of the cover plate (10). The inner wall of the right cover plate (6) is slidably connected to the side of the right heat exchange plate (12) on which the first sealing gasket (13) is placed.

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