Assembled turbofan type heat exchanger

Abstract

The invention discloses an assembled turbofan type heat exchanger, and relates to the technical field of heat exchangers. Comprising a first heat exchange water inlet assembly provided with a cold flow water inlet and a hot flow water outlet, and a second heat exchange water inlet assembly provided with a cold flow water outlet and a hot flow water inlet. The standard heat exchange unit assembly is arranged between the first heat exchange water inlet assembly and the second heat exchange water inlet assembly to communicate with the first heat exchange water inlet assembly and the second heat exchange water inlet assembly, and the first heat exchange water inlet assembly and the second heat exchange water inlet assembly are detachably connected with the standard heat exchange unit assembly. The first heat exchange water inlet assembly, the second heat exchange water inlet assembly and the standard heat exchange unit assembly are each internally provided with a cold flow spiral channel which communicates with one another, and the first heat exchange water inlet assembly, the second heat exchange water inlet assembly and the standard heat exchange unit assembly are each internally provided with a hot flow spiral channel which communicates with one another. The cold flow spiral channels and the hot flow spiral channels are arranged in a staggered mode, and the heat exchange effect is improved on the basis that it is guaranteed that the heat exchanger is convenient to disassemble, assemble and clean.

Description

Technical Field

[0001] The present invention relates to the technical field of heat exchangers, and in particular to an assembled turbofan heat exchanger. Background Art

[0002] In the industrial sector, the efficiency of hot and cold medium exchange directly impacts production quality, cost, and sustainable development. Traditional shell-and-tube and plate-type heat exchangers, limited by manufacturing processes, suffer from a single internal flow path, low heat exchange efficiency, and bulky equipment, making them difficult to meet the demands of complex industrial environments and efficient heat exchange. Currently, 3D printing technology, by overcoming the limitations of traditional manufacturing processes and enabling the integrated molding of complex structures, is bringing hope to heat exchanger innovation. However, it also faces a bottleneck in processing size—it is currently difficult to directly print oversized and long specimens. In terms of compactness and ease of maintenance, the large size and large footprint of traditional heat exchangers have become obstacles to optimizing industrial production space. Furthermore, due to the limited power of the pumps used to pump the heat flow, existing heat exchangers cannot unlimitedly add baffles within the shell (which increases pressure drop). Consequently, the flow path length is limited, inevitably reducing heat transfer efficiency. Furthermore, the densely packed heat exchange tubes of conventional shell-and-tube heat exchangers make it difficult to effectively clean the central tubes of the heat exchange bundle (the tubes are expanded and welded and cannot be removed without leaking).

[0003] Therefore, it is necessary to develop and design an assembled turbofan heat exchanger. On the basis of ensuring that the heat exchanger is easy to disassemble, assemble and clean, improving the heat exchange effect is a technical problem that technical personnel in this field urgently need to solve. Summary of the Invention

[0004] In order to solve the above problems, the present invention provides an assembled turbofan heat exchanger, which adopts a segmented printing strategy, designs a modular turbofan-shaped heat exchange unit, and constructs a spiral layered three-dimensional flow channel for cold and hot flows. Compared with the fixed straight cylindrical flow channel of the traditional shell and tube heat exchanger, the spiral structure significantly extends the contact path of the cold and hot media, increases the contact area, effectively improves the heat exchange efficiency, and improves the heat exchange dead corner problem caused by the flow path of the traditional heat exchanger.

[0005] To achieve the above object, the present invention provides the following solutions:

[0006] An assembled turbofan heat exchanger comprises a first heat exchange water inlet assembly provided with a cold flow inlet and a hot flow outlet, a second heat exchange water inlet assembly provided with a cold flow outlet and a hot flow inlet, and a standard heat exchange unit assembly arranged between the first heat exchange water inlet assembly and the second heat exchange water inlet assembly to connect the first heat exchange water inlet assembly and the second heat exchange water inlet assembly, the first heat exchange water inlet assembly and the second heat exchange water inlet assembly being detachably connected to the standard heat exchange unit assembly, the first heat exchange water inlet assembly, the second heat exchange water inlet assembly and the standard heat exchange unit assembly being internally provided with interconnected cold flow spiral channels, the first heat exchange water inlet assembly, the second heat exchange water inlet assembly and the standard heat exchange unit assembly being internally provided with interconnected hot flow spiral channels, and the cold flow spiral channels and the hot flow spiral channels being staggered.

[0007] Preferably, the number of the standard heat exchange unit assembly is at least one.

[0008] Preferably, the mating ends of the first heat exchange water inlet assembly and the standard heat exchange unit assembly, the mating ends of the second heat exchange water inlet assembly and the standard heat exchange unit assembly, and the mating ends of adjacent standard heat exchange unit assemblies are all provided with connecting flanges, and the connecting flanges are fastened together by bolts.

[0009] Preferably, the mating ends of the first heat exchange water inlet assembly and the standard heat exchange unit assembly, the mating ends of the second heat exchange water inlet assembly and the standard heat exchange unit assembly, and the mating ends of adjacent standard heat exchange unit assemblies are all provided with mutually mating splicing grooves and splicing groove platforms, and a sealing gasket is provided between the splicing grooves and the splicing groove platforms.

[0010] Preferably, the first heat exchange water inlet assembly, the second heat exchange water inlet assembly and the standard heat exchange unit assembly all include an outer shell and an inner shell arranged inside the outer shell, an intermediate annular support is arranged inside the inner shell, a first spiral partition plate is arranged between the outer wall of the inner shell and the inner wall of the outer shell, the first spiral partition plates are distributed circumferentially along the outer wall of the inner shell, a second spiral partition plate is arranged between adjacent first spiral partition plates, the second spiral partition plate is arranged between the outer wall of the inner shell and the inner wall of the outer shell, the first spiral partition plate, the outer shell, the inner shell and the second spiral partition plates on both sides adjacent to the first spiral partition plate respectively form the hot flow spiral channel and the cold flow spiral channel.

[0011] Preferably, a spiral support plate is further provided between the center of the inner shell and the inner wall of the outer shell, and the thickness of the spiral support plate is greater than the thickness of the first spiral partition plate and the second spiral partition plate.

[0012] Preferably, an annular partition plate is provided between adjacent first spiral partition plates and second spiral partition plates.

[0013] Preferably, the annular partition plate is intermittently arranged along the axial direction of the heat exchanger, and the discontinuity points are located at the connection between the first heat exchange water inlet component and the standard heat exchange unit component, the adjacent standard heat exchange unit component, and the second heat exchange water inlet component and the standard heat exchange unit component.

[0014] Preferably, the annular partition plate is provided in at least two layers, and the annular partition plate sequentially separates the hot flow spiral channel from the direction close to the inner shell to the direction away from the inner shell into an innermost layer of hot flow spiral channel, an intermediate layer of hot flow spiral channel, and an outermost layer of hot flow spiral channel; the annular partition plate sequentially separates the cold flow spiral channel from the direction close to the inner shell to the direction away from the inner shell into an innermost layer of cold flow spiral channel, an intermediate layer of cold flow spiral channel, and an outermost layer of cold flow spiral channel;

[0015] The spiral directions of the innermost heat flow spiral channel, the middle heat flow spiral channel and the outermost heat flow spiral channel in the same layer are the same;

[0016] The spiral directions of the innermost cold flow spiral channel, the middle cold flow spiral channel and the outermost cold flow spiral channel in the same layer are the same;

[0017] In the first heat exchange water inlet assembly and the second heat exchange water inlet assembly, the innermost cold flow spiral channel, the middle cold flow spiral channel, and the outermost cold flow spiral channel have the same spiral direction, and the innermost hot flow spiral channel, the middle hot flow spiral channel, and the outermost hot flow spiral channel have the same spiral direction;

[0018] In the standard heat exchange unit assembly, the spiral directions of the innermost cold flow spiral channel, the middle cold flow spiral channel and the outermost cold flow spiral channel are the same or opposite, and the spiral directions of the innermost hot flow spiral channel, the middle hot flow spiral channel and the outermost hot flow spiral channel are the same or opposite.

[0019] Preferably, a partition for separating the cold fluid and the hot fluid, as well as a guide shell and a guide groove for guiding the fluid are provided on the first heat exchange water inlet assembly between the cold flow inlet and the hot flow outlet, and on the second heat exchange water inlet assembly between the cold flow outlet and the hot flow inlet.

[0020] Compared with the prior art, the present invention has achieved the following technical effects:

[0021] By making the first heat exchange water inlet assembly and the standard heat exchange unit assembly, the second heat exchange water inlet assembly and the standard heat exchange unit assembly, and the standard heat exchange unit assemblies detachable, the first heat exchange water inlet assembly, the second heat exchange water inlet assembly and the standard heat exchange unit assembly can be independently disassembled and assembled, and cleaning and maintenance are convenient. In addition, a cold flow spiral channel and a hot flow spiral channel are provided, and the cold flow spiral channel and the hot flow spiral channel are staggered, so that the contact path of the cold and hot media can be significantly extended, the contact area can be increased, the heat exchange efficiency can be effectively improved, and the heat exchange dead angle problem caused by the flow path of the traditional heat exchanger can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0023] Attachment Figure 1 This is a schematic diagram of the overall structure of the standard heat exchange unit assembly of the assembled turbofan heat exchanger disclosed in the present invention;

[0024] Attachment Figure 2 A schematic diagram of the overall structure of the second heat exchange water inlet assembly of the assembled turbofan heat exchanger disclosed in the present invention;

[0025] Attachment Figure 3 A schematic diagram of the overall structure of the assembled turbofan heat exchanger sealing gasket disclosed in the present invention;

[0026] Attachment Figure 4 A schematic diagram of the overall structure of the assembled turbofan heat exchanger bolts disclosed in the present invention;

[0027] Attachment Figure 5 A schematic diagram of the overall structure of the assembled turbofan heat exchanger disclosed in the present invention;

[0028] Attachment Figure 6 Schematic diagram of heat exchange between cold and hot fluid media in the assembled turbofan heat exchanger disclosed in the present invention (blue represents the cold flow medium flow channel, and red represents the hot flow medium flow channel);

[0029] Attachment Figure 7 A schematic diagram of the specific composition structure of the standard heat exchange unit assembly of the assembled turbofan heat exchanger disclosed in the present invention;

[0030] Attachment Figure 8 A schematic diagram of the structure of the spiral separation plate and spiral support plate of the assembled turbofan heat exchanger disclosed in the present invention;

[0031] Attachment Figure 9 A schematic diagram of the structure of the assembled turbofan heat exchanger baffle disclosed in the present invention;

[0032] Among them, 1. bolt hole; 2. splicing groove; 3. annular partition plate; 4. spiral support plate; 5. outer shell; 6. inner shell; 7. connecting flange; 8. second spiral partition plate; 9. first spiral partition plate; 10. hot flow inlet; 11. cold flow outlet; 12. splicing trough; 13. sealing gasket; 14. bolt; 15. first heat exchange water inlet assembly; 16. second heat exchange water inlet assembly; 17. standard heat exchange unit assembly; 18. cold flow inlet; 19. hot flow outlet; 20. hot flow spiral channel; 21. cold flow spiral channel; 22. partition; 23. hot flow guide groove; 24. guide shell; 25. cold flow guide groove. DETAILED DESCRIPTION

[0033] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0034] The purpose of the present invention is to provide an assembled turbofan heat exchanger, which adopts a segmented printing strategy to design a modular turbofan-shaped heat exchange unit and construct a spiral layered three-dimensional flow channel for hot and cold flows. Compared with the fixed straight cylindrical flow channel of the traditional shell and tube heat exchanger, the spiral structure significantly extends the contact path of the hot and cold media, increases the contact area, effectively improves the heat exchange efficiency, and improves the heat exchange dead corner problem caused by the flow path of the traditional heat exchanger.

[0035] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0036] refer to Figures 1-8The assembled turbofan heat exchanger disclosed in the embodiment of the present invention comprises at least a first heat exchange water inlet assembly 15, a second heat exchange water inlet assembly 16, and a standard heat exchange unit assembly 17 disposed between the first heat exchange water inlet assembly 15 and the second heat exchange water inlet assembly 16. The first heat exchange water inlet assembly 15 is provided with a cold flow water inlet 18 and a hot flow water outlet 19. The second heat exchange water inlet assembly 16 is provided with a cold flow water outlet 11 and a hot flow water inlet 10. The cold flow water inlet 18 and the cold flow outlet 11 are connected by the standard assembly 17. The hot flow water inlet 10 is connected to the hot flow water outlet 19 standard component 17, the first heat exchange water inlet component 15 and the standard heat exchange unit component 17, the second heat exchange water inlet component 16 and the standard heat exchange unit component 17, and the standard heat exchange unit components 17 can be detachably connected. The first heat exchange water inlet component 15, the second heat exchange water inlet component 16 and the standard heat exchange unit component 17 are all provided with a cold flow spiral channel 21 that is interconnected. The two ends of the cold flow spiral channel 21 are respectively connected to the cold flow water inlet 18 The first heat exchange water inlet assembly 15, the second heat exchange water inlet assembly 16 and the standard heat exchange unit assembly 17 are all provided with interconnected heat flow spiral channels 20, and the two ends of the heat flow spiral channel 20 are respectively connected to the heat flow water inlet 10 and the heat flow outlet 19, and the cold flow spiral channel 21 and the hot flow spiral channel 20 are staggered. By connecting the first heat exchange water inlet assembly 15 and the standard heat exchange unit assembly 17, the second heat exchange water inlet assembly 16 and the standard heat exchange unit assembly 17, and The standard heat exchange unit components 17 can be detachably connected, so that the first heat exchange water inlet component 15, the second heat exchange water inlet component 16 and the standard heat exchange unit component 17 can be independently disassembled and assembled, which is convenient for cleaning and maintenance. A cold flow spiral channel 21 and a hot flow spiral channel 20 are provided, and the cold flow spiral channel 21 and the hot flow spiral channel 20 are staggered, which can significantly extend the contact path of the cold and hot media, increase the contact area, effectively improve the heat exchange efficiency, and improve the heat exchange dead angle problem caused by the flow path of the traditional heat exchanger.

[0037] refer to Figures 1-8 In one embodiment, there is at least one standard heat exchange unit assembly 17. By setting multiple groups of standard heat exchange unit assemblies 17, the assembly of heat exchangers of any size can be achieved, thereby improving the applicability of the heat exchanger.

[0038] refer to Figures 1-8As a preferred embodiment, the mating ends of the first heat exchange water inlet assembly 15 and the standard heat exchange unit assembly 17, the mating ends of the second heat exchange water inlet assembly 16 and the standard heat exchange unit assembly 17, and the mating ends of adjacent standard heat exchange unit assemblies 17 are all provided with connecting flanges 7, and bolt holes 1 are opened on the connecting flanges 7. The connecting flanges 7 are fastened together by bolts 14. By setting the structure of the connecting flanges 7 and the bolts 14, the first heat exchange water inlet assembly 15, the standard heat exchange unit assembly 17 and the second heat exchange water inlet assembly 16 can be easily disassembled and assembled.

[0039] refer to Figures 1-8 As an embodiment, the mating ends of the first heat exchange water inlet assembly 15 and the standard heat exchange unit assembly 17, the mating ends of the second heat exchange water inlet assembly 16 and the standard heat exchange unit assembly 17, and the mating ends of the adjacent standard heat exchange unit assemblies 17 are all provided with mutually mating splicing grooves 2 and splicing groove platforms 12, and a sealing gasket 13 is provided between the splicing grooves 2 and the splicing groove platforms 12. By providing the splicing grooves 2 and the splicing groove platforms 12, the positioning of the first heat exchange water inlet assembly 15 and the standard heat exchange unit assembly 17, the second heat exchange water inlet assembly 16 and the standard heat exchange unit assembly 17, and the adjacent standard heat exchange unit assembly 17 can be achieved, which is convenient for installation, and the sealing gasket 13 is provided between the splicing grooves 2 and the splicing groove platforms 12, which can effectively prevent the leakage of cold and hot media and ensure the sealing of the heat exchanger.

[0040] It should be noted that the mating ends of the first heat exchange water inlet assembly 15 and the standard heat exchange unit assembly 17, the mating ends of the second heat exchange water inlet assembly 16 and the standard heat exchange unit assembly 17, the connections of the spiral support plates 4 at the mating ends of adjacent standard heat exchange unit assemblies 17, and the connections of the inner shell 6 are all provided with sealing gaskets 13, and the mating ends of the adjacent first spiral partition plates 9, the mating ends of the adjacent second spiral partition plates 8, and the mating ends of the adjacent spiral support plates 4 are all provided with splicing grooves 2 and splicing groove platforms 12.

[0041] refer to Figures 1-8As a preferred embodiment, the first heat exchange water inlet assembly 15, the second heat exchange water inlet assembly 16 and the standard heat exchange unit assembly 17 all include an outer shell 5 and an inner shell 6 arranged inside the outer shell 5, an intermediate annular support is provided inside the inner shell 6, and the intermediate annular support is used to support the inner shell 6. A first spiral partition plate 9 is provided between the outer wall of the inner shell 6 and the inner wall of the outer shell 5. The first spiral partition plates 9 are spaced circumferentially along the outer wall of the inner shell 6. A second spiral partition plate 8 is provided between adjacent first spiral partition plates 9. The second spiral partition plate 8 is provided between the outer wall of the inner shell 6 and the outer wall. A hot flow spiral channel 20 and a cold flow spiral channel 21 are respectively formed between the inner walls of the shell 5, the first spiral partition plate 9, the outer shell 5, the inner shell 6 and the second spiral partition plate 8 on both sides adjacent to the first spiral partition plate 9. By setting the first spiral partition plate 9 and the second spiral partition plate 8, the internal space of the outer shell can be divided into multiple cold flow spiral channels 21 and hot flow spiral channels 20, and the cold flow spiral channels 21 and the hot flow spiral channels 20 are staggered, that is, a turbofan design is adopted to extend the length of the heat exchange medium flow channel, increase the heat exchange area and improve the heat exchange effect in a limited space.

[0042] It should be noted that the first spiral partition plates 9 and the second spiral partition plates 8 are evenly arranged along the circumference of the inner shell 6 .

[0043] refer to Figures 1-8 As a preferred method, a spiral support plate 4 is further provided between the center of the inner shell 6 and the inner wall of the outer shell 5. The thickness of the spiral support plate 4 is greater than the thickness of the first spiral partition plate 9 and the second spiral partition plate 8. By providing the spiral support plate 4, the supporting strength of the heat exchanger can be improved, the strength of the main structure can be strengthened, and the overall stability can be ensured.

[0044] It should be noted that the ends of the first spiral partition plate 9, the second spiral partition plate 8 and the spiral support plate 4 along the axial direction of the heat exchanger are transitioned from spiral plates to straight plates, which is convenient for opening the splicing groove 2. This can not only avoid the problem of excessive stress concentration caused by grooving on the curved spiral support plate 4, but also facilitate the subsequent spiral assembly process.

[0045] refer to Figures 1-8 As an implementation method, the spiral support plate 4, the first spiral partition plate 9 and the second spiral partition plate 8 have the same spiral direction, which ensures the heat exchange effect while ensuring the support strength and reduces the processing difficulty.

[0046] refer to Figures 1-8As an implementation method, an annular partition plate 3 is provided between the adjacent first spiral partition plates 9 and the second spiral partition plates 8. By providing the annular partition plate 3, not only the supporting strength of the heat exchanger can be further guaranteed, but also because the thermal conductivity of the fluid is much lower than that of the solid, the annular partition plate 3 is added to absorb the heat of the hot fluid and conduct heat through the solid, thereby increasing the heat exchange capacity and improving the heat exchange effect.

[0047] refer to Figures 1-8 As an embodiment, the annular partition plate 3 is discontinuously arranged along the axial direction of the heat exchanger, and the discontinuity point is located at the connection between the first heat exchange water inlet component 15 and the standard heat exchange unit component 17, the adjacent standard heat exchange unit component 17, and the second heat exchange water inlet component 16 and the standard heat exchange unit component 17. By discontinuously arranging the annular partition plate 3 along the axial direction of the heat exchanger, in a single cold flow spiral channel 21 or a single hot flow spiral channel 20, when the fluid reaches the discontinuity point of the annular partition plate 3, the fluid can be mixed here, thereby avoiding the problem that the fluid temperature in the same spiral channel will be different as the heat exchange continues due to being divided into different grids by the annular partition plate 3.

[0048] refer to Figures 1-8 In one embodiment, the annular partition plate 3 is provided with at least two layers. The annular partition plate 3 sequentially separates the hot flow spiral channel into an innermost layer of hot flow spiral channel, an intermediate layer of hot flow spiral channel, and an outermost layer of hot flow spiral channel from a direction close to the inner shell 6 to a direction away from the inner shell 6. The annular partition plate 3 sequentially separates the cold flow spiral channel into an innermost layer of cold flow spiral channel, an intermediate layer of cold flow spiral channel, and an outermost layer of cold flow spiral channel from a direction close to the inner shell 6 to a direction away from the inner shell 6.

[0049] The spiral directions of the innermost heat flow spiral channels in the same layer are the same, the spiral directions of the middle heat flow spiral channels in the same layer are the same, and the spiral directions of the outermost heat flow spiral channels in the same layer are the same;

[0050] The spiral directions of the same layer of the innermost cold flow spiral channel are the same, the spiral directions of the same layer of the middle cold flow spiral channel are the same, and the spiral directions of the same layer of the outermost cold flow spiral channel are the same;

[0051] In the first heat exchange water inlet assembly 15 and the second heat exchange water inlet assembly 16, the innermost cold flow spiral channel, the middle cold flow spiral channel and the outermost cold flow spiral channel have the same spiral direction, and the innermost hot flow spiral channel, the middle hot flow spiral channel and the outermost hot flow spiral channel have the same spiral direction, which can facilitate water inlet and outlet;

[0052] In the standard heat exchange unit assembly 17, the spiral directions of the innermost cold flow spiral channel, the intermediate cold flow spiral channel and the outermost cold flow spiral channel are the same or opposite, and the spiral directions of the innermost hot flow spiral channel, the intermediate hot flow spiral channel and the outermost hot flow spiral channel are the same or opposite.

[0053] Reference Figure 9 As an embodiment, a partition plate 22 is arranged on the first heat exchange water inlet assembly 15 between the cold flow water inlet 18 and the hot flow water outlet 19. The partition plate 22 can block the hot flow spiral channel 20 at the hot flow water outlet 19, so that the cold flow water inlet 18 is only communicated with the cold flow spiral channel 21. At this time, the cold flow water inlet 18 is arranged at the end of the heat exchanger, and an annular flow channel is arranged at the cold flow water inlet 18, and a flow guide shell 24 and a cold flow guide groove 25 for guiding the cold fluid are arranged at the annular flow channel. The cold flow guide groove 25 is communicated with the cold flow spiral channel 21, so as to facilitate the cold fluid to enter the cold flow spiral channel 21. A partition plate 22 is arranged on the second heat exchange water inlet assembly 16 between the cold flow water outlet 11 and the hot flow water inlet 10. The partition plate 22 can block the cold flow spiral channel 21 at the cold flow water outlet 11, so that the hot flow water inlet 10 is only communicated with the hot flow spiral channel 20. At this time, the hot flow water inlet 10 is arranged at the end of the heat exchanger away from the cold flow water inlet 18, and an annular flow channel is arranged at the hot flow water inlet 10, and a flow guide shell 24 and a hot flow guide groove 23 for guiding the hot fluid are arranged at the annular flow channel. The hot flow guide groove 23 is communicated with the hot flow spiral channel 20, so as to facilitate the hot fluid to enter the hot flow spiral channel 20.

[0054] After the length and diameter of the standard heat exchange unit assembly 17 are determined, the number of the first spiral partition plate 9 and the second spiral partition plate 8 between the cold fluid medium or the hot fluid medium can be adjusted in the radial direction, so as to adjust the number of the internal partitions of a single fluid. By adjusting the number of the first spiral partition plate 9 and the second spiral partition plate 8, the heat exchange area can be increased or decreased. By adjusting the spiral angle of the spiral direction, the length of the spiral flow of the fluid can be changed. Through the above adjustment modes, the heat exchanger can be flexibly designed according to the actual working condition and the heat exchange capacity demand.

[0055] It should be noted that, for those skilled in the art, it is obvious that the present application is not limited to the details of the above exemplary embodiments, and the present application can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting, and the scope of the present application is defined by the appended claims rather than the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the application. Any reference signs in the claims should not be regarded as limiting the claims involved.

Claims

1. An assembled turbofan heat exchanger, characterized in that: It includes a first heat exchange water inlet assembly provided with a cold flow inlet and a hot flow outlet, a second heat exchange water inlet assembly provided with a cold flow outlet and a hot flow inlet, and a standard heat exchange unit assembly arranged between the first heat exchange water inlet assembly and the second heat exchange water inlet assembly to connect the first heat exchange water inlet assembly and the second heat exchange water inlet assembly, the first heat exchange water inlet assembly and the second heat exchange water inlet assembly are detachably connected to the standard heat exchange unit assembly, the first heat exchange water inlet assembly, the second heat exchange water inlet assembly and the standard heat exchange unit assembly are all provided with interconnected cold flow spiral channels, the first heat exchange water inlet assembly, the second heat exchange water inlet assembly and the standard heat exchange unit assembly are all provided with interconnected hot flow spiral channels, and the cold flow spiral channels and the hot flow spiral channels are staggered.

2. The assembled turbofan heat exchanger according to claim 1, characterized in that: The standard heat exchange unit assembly is provided in at least one.

3. The assembled turbofan heat exchanger according to claim 1, characterized in that: The mating ends of the first heat exchange water inlet assembly and the standard heat exchange unit assembly, the mating ends of the second heat exchange water inlet assembly and the standard heat exchange unit assembly, and the mating ends of adjacent standard heat exchange unit assemblies are all provided with connecting flanges, and the connecting flanges are fastened together by bolts.

4. The assembled turbofan heat exchanger according to claim 3, characterized in that: The mating ends of the first heat exchange water inlet assembly and the standard heat exchange unit assembly, the mating ends of the second heat exchange water inlet assembly and the standard heat exchange unit assembly, and the mating ends of adjacent standard heat exchange unit assemblies are all provided with mutually mating splicing grooves and splicing groove platforms, and a sealing gasket is provided between the splicing grooves and the splicing groove platforms.

5. The assembled turbofan heat exchanger according to claim 1, characterized in that: The first heat exchange water inlet assembly, the second heat exchange water inlet assembly and the standard heat exchange unit assembly all include an outer shell and an inner shell arranged inside the outer shell, an intermediate annular support is arranged inside the inner shell, a first spiral partition plate is arranged between the outer wall of the inner shell and the inner wall of the outer shell, the first spiral partition plates are distributed at intervals along the circumferential direction of the inner shell outer wall, a second spiral partition plate is arranged between adjacent first spiral partition plates, the second spiral partition plate is arranged between the outer wall of the inner shell and the inner wall of the outer shell, the first spiral partition plate, the outer shell, the inner shell and the second spiral partition plates on both sides adjacent to the first spiral partition plate respectively form the hot flow spiral channel and the cold flow spiral channel.

6. The assembled turbofan heat exchanger according to claim 5, characterized in that: A spiral support plate is further provided between the center of the inner shell and the inner wall of the outer shell, and the thickness of the spiral support plate is greater than the thickness of the first spiral partition plate and the second spiral partition plate.

7. The assembled turbofan heat exchanger according to claim 6, characterized in that: An annular partition plate is provided between the adjacent first spiral partition plates and the second spiral partition plates.

8. The assembled turbofan heat exchanger according to claim 7, characterized in that: The annular partition plate is intermittently arranged along the axial direction of the heat exchanger, and the discontinuity points are located at the connection between the first heat exchange water inlet component and the standard heat exchange unit component, the adjacent standard heat exchange unit component, and the second heat exchange water inlet component and the standard heat exchange unit component.

9. The assembled turbofan heat exchanger according to claim 8, characterized in that: The annular partition plate is provided with at least two layers, and the annular partition plate sequentially separates the hot flow spiral channel from the direction close to the inner shell to the direction away from the inner shell into the innermost layer of hot flow spiral channel, the middle layer of hot flow spiral channel and the outermost layer of hot flow spiral channel; the annular partition plate sequentially separates the cold flow spiral channel from the direction close to the inner shell to the direction away from the inner shell into the innermost layer of cold flow spiral channel, the middle layer of cold flow spiral channel and the outermost layer of cold flow spiral channel; The spiral directions of the innermost heat flow spiral channel, the middle heat flow spiral channel and the outermost heat flow spiral channel in the same layer are the same; The spiral directions of the innermost cold flow spiral channel, the middle cold flow spiral channel and the outermost cold flow spiral channel in the same layer are the same; In the first heat exchange water inlet assembly and the second heat exchange water inlet assembly, the innermost cold flow spiral channel, the middle cold flow spiral channel, and the outermost cold flow spiral channel have the same spiral direction, and the innermost hot flow spiral channel, the middle hot flow spiral channel, and the outermost hot flow spiral channel have the same spiral direction; In the standard heat exchange unit assembly, the spiral directions of the innermost cold flow spiral channel, the middle cold flow spiral channel and the outermost cold flow spiral channel are the same or opposite, and the spiral directions of the innermost hot flow spiral channel, the middle hot flow spiral channel and the outermost hot flow spiral channel are the same or opposite.

10. The assembled turbofan heat exchanger according to claim 1, characterized in that: The first heat exchange water inlet assembly is located between the cold flow inlet and the hot flow outlet, and the second heat exchange water inlet assembly is located between the cold flow outlet and the hot flow inlet. A partition for separating the cold fluid and the hot fluid, as well as a guide shell and a guide groove for guiding the fluid are provided.

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