Corrosion-resistant micro-channel heat exchanger

Abstract

The invention relates to the technical field of heat exchangers, and discloses a corrosion-resistant micro-channel heat exchanger which comprises a water inlet channel, a water outlet channel and a water changing channel, a motor is fixedly connected to the outer wall of the water inlet channel, a water inlet pipe is arranged in the water inlet channel, and a transmission shaft is fixedly arranged at the output end of the motor; the outer wall of the transmission shaft is rotationally connected into the water inlet channel and the water outlet channel, a first spiral piece and a second spiral piece are arranged on the outer wall of the transmission shaft, the first spiral piece is located in the water inlet channel, the second spiral piece is located in the water outlet channel, and the screw pitch of the first spiral piece and the screw pitch of the second spiral piece are gradually increased from top to bottom. Through cooperation of the motor, the transmission shaft, the first spiral piece, the second spiral piece, the first bevel gear, the second bevel gear, the rotating shaft, the water inlet spiral piece and the arc-shaped block, inlet and outlet water can be guided, water flow circulates in different micro-channel plates, local heat nonuniformity is avoided, and the service life of the micro-channel heat exchanger is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of heat exchangers, and particularly to a corrosion-resistant microchannel heat exchanger. Background Art

[0002] A microchannel heat exchanger is a highly efficient heat exchange device with a microchannel structure. Based on heat conduction and fluid flow, a cooling medium enters the microchannel plate from an inlet pipe, contacts a heating medium, conducts heat through the microchannel wall, takes away the heat in the heating medium, and then is discharged from the outlet pipes respectively to achieve heat exchange between the two media.

[0003] Generally, when the system is operating, if the flow rate and pressure of the water flow are unstable and there are large fluctuations, it will affect the water inlet uniformity of the microchannel heat exchanger. And the internal channels of the microchannel heat exchanger are small and numerous, and the traditional direct water inlet method is likely to cause uneven flow distribution at the entrances of each microchannel. Summary of the Invention

[0004] In view of the deficiencies of the prior art, the present invention provides a corrosion-resistant microchannel heat exchanger, which solves the problem that the direct water inlet method is likely to cause uneven flow distribution at the entrances of each microchannel.

[0005] To achieve the above objectives, the present invention is realized through the following technical solutions: A corrosion-resistant microchannel heat exchanger includes a water inlet channel, a water outlet channel, and a water changing channel. A motor is fixedly connected to the outer wall of the water inlet channel. A water inlet pipe is arranged inside the water inlet channel. The output end of the motor is fixedly provided with a transmission shaft. The outer wall of the transmission shaft is rotatably connected inside the water inlet channel and the water outlet channel. The outer wall of the transmission shaft is provided with a first spiral blade and a second spiral blade. The first spiral blade is located inside the water inlet channel, and the second spiral blade is located inside the water outlet channel. The pitches of the first spiral blade and the second spiral blade both gradually increase from top to bottom. A first bevel gear is fixedly connected to the outer wall of the transmission shaft. The tooth end of the first bevel gear is meshed with a second bevel gear. A rotating shaft is fixedly connected to the outer wall of the second bevel gear. A water inlet spiral blade is fixedly connected to the outer wall of the rotating shaft. Arc-shaped blocks are arranged inside both the water inlet channel and the water outlet channel. A water outlet pipe is arranged inside the water outlet channel. A fixing component is arranged on the outer wall of the water inlet channel.

[0006] Preferably, the fixing component includes a fixing frame. The outer wall of the fixing frame is fixedly connected to the outer walls of the water inlet channel, the water outlet channel, and the water changing channel. Heat insulation blocks are fixedly connected to the outer walls of the water inlet channel and the water outlet channel.

[0007] Preferably, a filter plate is arranged inside the water inlet pipe. The inside of the filter plate is rotatably connected to the outer wall of the rotating shaft. A scraper is fixedly connected to the outer wall of the rotating shaft. The outer wall of the scraper is rotatably connected to the outer wall of the filter plate.

[0008] Preferably, bell mouths are fixedly connected inside the water inlet channel, the water outlet channel and the water changing channel. A connecting pipe rack is fixedly connected to the outer wall of the bell mouth. A shunt pipe is attached to the outer wall of the connecting pipe rack. A microchannel plate is fixedly connected to the outer wall of the shunt pipe.

[0009] Preferably, a sleeve is slidably connected to the outer wall of the shunt pipe. Springs and sliding rods are fixedly connected to the outer wall of the sleeve. The outer wall of the spring is fixedly connected to the outer wall of the shunt pipe.

[0010] Preferably, the outer wall of the sliding rod is slidably connected inside the shunt pipe, and a handle is fixedly connected to the outer wall of the sliding rod.

[0011] Preferably, a sliding rack is slidably connected inside the connecting pipe rack. A tension spring is fixedly connected to the outer wall of the sliding rack. The outer wall of the tension spring is fixedly connected to the outer wall of the connecting pipe rack.

[0012] Preferably, a telescopic rod is fixedly connected to the outer wall of the sliding rack. The outer wall of the telescopic rod is fixedly connected to the outer wall of the connecting pipe rack.

[0013] Preferably, a slider is fixedly connected to the outer wall of the sliding rack. A push block is slidably connected to the outer wall of the slider. The outer wall of the push block is fixedly connected to the outer wall of the sleeve.

[0014] Preferably, corrosion-resistant coatings are provided on the inner walls of the water inlet channel, the water outlet channel and the water changing channel. The corrosion-resistant coatings are made of polytetrafluoroethylene material.

[0015] Working principle: When using this heat exchanger, hot water enters from the water inlet pipe, passes through the filtration of the filter plate, and enters the inside of the water inlet channel. The motor is started to drive the transmission shaft to rotate. The transmission shaft drives the first bevel gear to rotate. The first bevel gear drives the rotating shaft to rotate through the second bevel gear. The rotating shaft drives the water inlet spiral blades to rotate, which can guide the water flow inside the water inlet pipe. At the same time, the transmission shaft drives the first spiral blade to rotate, which can make the water flow enter the bell mouth evenly; When the transmission shaft rotates, the scraper can be driven to rotate through the rotating shaft, which can clean the filter plate and prevent the filter plate from being blocked; The water flow enters the shunt pipe through the bell mouth and the connecting pipe rack. The shunt pipe shunts the water to the microchannel plate. The microchannel plate then enters the water changing channel through the shunt pipe, the connecting pipe rack and the bell mouth. The water inside the water changing channel flows from top to bottom and then enters the inside of the lower microchannel plate. Under the guidance of the second spiral blade, the cold water flow flows out from the water outlet pipe; When it is necessary to replace the microchannel plate, the sliding rod can be driven to slide by pulling the handle. The sliding rod drives the sleeve to slide, and the sleeve disengages from the connecting pipe rack. At this time, the microchannel plate can be removed. Place the new microchannel plate between the connecting pipe racks on both sides. First, contract the sleeve, and then release the sleeve so that the sleeve fits over the outer wall of the connecting pipe rack. When the sleeve is removed, the tension spring contracts and rebounds, driving the sliding frame to slide. The sliding frame is inserted inside the connecting pipe rack to seal the connecting pipe rack.

[0016] The present invention provides a corrosion-resistant microchannel heat exchanger, which has the following beneficial effects: 1. Through the cooperation among the motor, the transmission shaft, the first helical fin, the second helical fin, the first bevel gear, the second bevel gear, the rotating shaft, the water inlet helical fin and the arc block, the present invention can guide the inflow and outflow of water, making the water flow through different microchannel plates, avoiding uneven local heat, and prolonging the service life of the microchannel heat exchanger.

[0017] 2. The filter plate of the present invention filters the inlet water, preventing impurities from accumulating inside the heat exchanger and reducing the heat exchange efficiency. Moreover, the rotating shaft drives the scraper to rotate, and the scraper can rotate on the outer wall of the filter plate to prevent the filter plate from being blocked and ensure normal water inlet.

[0018] 3. Through the cooperation among the connecting pipe rack, the shunt pipe, the microchannel plate, the sleeve, the spring, the sliding rod and the handle, the present invention can integrate multiple microchannel plates together to form a module, which is convenient for disassembly and installation. When damaged, it can be replaced.

[0019] 4. Further, when the microchannel plate is disassembled, the tension spring contracts, and the connecting pipe rack can be blocked by the sliding frame to prevent the liquid in the heat exchanger from leaking. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a perspective view of the present invention; Figure 2 is a partial structural schematic diagram of the first helical fin of the present invention; Figure 3 is a partial structural schematic diagram of the first bevel gear of the present invention; Figure 4 is a partial structural schematic diagram of the bell mouth of the present invention; Figure 5 is a partial structural schematic diagram of the sleeve of the present invention; Figure 6 is a schematic cross-sectional view of the internal structure of the connecting pipe rack of the present invention.

[0021] Among them, 1. water inlet channel; 2. water outlet channel; 3. water inlet pipe; 4. motor; 5. transmission shaft; 6. first spiral fin; 7. second spiral fin; 8. first bevel gear; 9. second bevel gear; 10. rotating shaft; 11. water inlet spiral fin; 12. arc-shaped block; 13. water changing channel; 14. fixing frame; 15. heat insulation block; 16. filter plate; 17. scraper; 18. bell mouth; 19. connecting pipe rack; 20. shunt pipe; 21. micro-channel plate; 22. sleeve; 23. spring; 24. sliding rod; 25. handle; 26. pushing block; 27. sliding frame; 28. tension spring; 29. telescopic rod; 30. slider; 31. water outlet pipe. Detailed implementation manner

[0022] Next, the technical solutions of the present invention will be clearly and completely described in conjunction with the accompanying drawings of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0023] Please refer to the attached Figure 1 - attached Figure 3 , an embodiment of the present invention provides a corrosion-resistant micro-channel heat exchanger, including a water inlet channel 1, a water outlet channel 2, and a water changing channel 13. The outer wall of the water inlet channel 1 is fixedly connected with a motor 4. A water inlet pipe 3 is arranged inside the water inlet channel 1. The output end of the motor 4 is fixedly provided with a transmission shaft 5. The outer wall of the transmission shaft 5 is rotatably connected inside the water inlet channel 1 and the water outlet channel 2. The outer wall of the transmission shaft 5 is provided with a first spiral fin 6 and a second spiral fin 7. The first spiral fin 6 is located inside the water inlet channel 1, and the second spiral fin 7 is located inside the water outlet channel 2. The pitches of the first spiral fin 6 and the second spiral fin 7 both gradually increase from top to bottom. The outer wall of the transmission shaft 5 is fixedly connected with a first bevel gear 8. The tooth end of the first bevel gear 8 is meshed and connected with a second bevel gear 9. The outer wall of the second bevel gear 9 is fixedly connected with a rotating shaft 10. The outer wall of the rotating shaft 10 is fixedly connected with a water inlet spiral fin 11. Arc-shaped blocks 12 are arranged inside both the water inlet channel 1 and the water outlet channel 2. A water outlet pipe 31 is arranged inside the water outlet channel 2. A fixing component is arranged on the outer wall of the water inlet channel 1; Specifically, the water inlet channel 1 fixes the motor 4. The motor 4 drives the transmission shaft 5 at the output end to rotate. The transmission shaft 5 passes through the inside of the water inlet channel 1 and the water outlet channel 2. The outer wall of the transmission shaft 5 is provided with a first spiral fin 6 and a second spiral fin 7. When the first spiral fin 6 and the second spiral fin 7 rotate, they can guide the water flow inside the water inlet channel 1 and the water outlet channel 2. At the same time, the transmission shaft 5 drives the second bevel gear 9 to rotate through the first bevel gear 8. The second bevel gear 9 drives the water inlet spiral fin 11 to rotate through the rotating shaft 10, which can guide the water flow inside the water inlet pipe 3. Cooperating with the arc-shaped block 12, the inflow and outflow of water can be made to flow evenly.

[0024] Please refer to the attached Figure 1 , the fixing component includes a fixing frame 14, the outer wall of the fixing frame 14 is fixedly connected to the outer walls of the water inlet channel 1, the water outlet channel 2 and the water changing channel 13, and heat insulation blocks 15 are fixedly connected to the outer walls of the water inlet channel 1 and the water outlet channel 2; Specifically, the fixing frame 14 fixedly connects the water inlet channel 1 and the water outlet channel 2 on the left side to the water changing channel 13 on the right side. The heat insulation blocks 15 are used to connect the water inlet channel 1 and the water outlet channel 2 and play a role in isolating the water inlet channel 1 and the water outlet channel 2.

[0025] Please refer to the attached Figure 2 - attached Figure 3 , a filter plate 16 is arranged inside the water inlet pipe 3. The inside of the filter plate 16 is rotatably connected to the outer wall of the rotating shaft 10. A scraper 17 is fixedly connected to the outer wall of the rotating shaft 10, and the outer wall of the scraper 17 is rotatably connected to the outer wall of the filter plate 16; Specifically, the filter plate 16 filters the water flowing into the water inlet pipe 3. When the rotating shaft 10 rotates, the scraper 17 can be driven to rotate synchronously, and the scraper 17 can clean the filter plate 16 to prevent the filter plate 16 from being blocked.

[0026] The filter plate 16 is disc-shaped, is closely attached to the inner cavity of the water inlet pipe, covers the entire flow section, and can achieve maximum primary filtration interception. The filter plate 16 is provided with regularly distributed small holes, and the aperture size is set according to the minimum width of the microchannel. The filter plate 16 is set to be connected in a snap-fit or threaded manner for convenient daily maintenance. The rotating shaft 10 can be driven to rotate by fluid power or external power, and the scraper 17 fits and continuously sweeps the impurities on the surface of the filter plate. This structure ensures that the filter plate is unobstructed for a long time, effectively prevents the microchannel from being blocked, and improves the reliability and automation level of the heat exchanger.

[0027] Please refer to the attached Figure 4 - attached Figure 5 , bell mouths 18 are fixedly connected inside the water inlet channel 1, the water outlet channel 2 and the water changing channel 13. A connecting pipe rack 19 is fixedly connected to the outer wall of the bell mouth 18, a flow dividing pipe 20 is attached to the outer wall of the connecting pipe rack 19, and a microchannel plate 21 is fixedly connected to the outer wall of the flow dividing pipe 20; Specifically, the bell mouths 18 can further guide the water flow. The bell mouths 18 on both sides are symmetrically arranged. The bell mouths 18 are connected to the flow dividing pipe 20 through the connecting pipe rack 19. Multiple groups of microchannel plates 21 can be arranged on the outer wall of the flow dividing pipe 20, and the microchannel plates 21 are used for heat transfer.

[0028] Please refer to the attached Figure 5 , a sleeve 22 is slidably connected to the outer wall of the flow dividing pipe 20. Springs 23 and sliding rods 24 are fixedly connected to the outer wall of the sleeve 22, and the outer wall of the spring 23 is fixedly connected to the outer wall of the flow dividing pipe 20; Specifically, when the spring 23 is released, it can push the sleeve 22 to slide. The sleeve 22 slides on the outer walls of the connecting pipe rack 19 and the shunt pipe 20. The sleeve 22 can connect the connecting pipe rack 19 and the shunt pipe 20, and the spring 23 can prevent loosening of the connection.

[0029] Please refer to the appendix Figure 4 - appendix Figure 5 , the outer wall of the sliding rod 24 is slidably connected inside the shunt pipe 20, and a handle 25 is fixedly connected to the outer wall of the sliding rod 24; Specifically, the sliding rod 24 supports the sliding of the sleeve 22. When it is necessary to disassemble the sleeve 22, the sleeve 22 can be disengaged from the outer wall of the connecting pipe rack 19 by pulling the handles 25 on both sides. At this time, the sleeve 22 and the shunt pipe 20 can be removed.

[0030] Please refer to the appendix Figure 5 - appendix Figure 6 , a sliding frame 27 is slidably connected inside the connecting pipe rack 19. A tension spring 28 is fixedly connected to the outer wall of the sliding frame 27, and the outer wall of the tension spring 28 is fixedly connected to the outer wall of the connecting pipe rack 19; Specifically, the sliding frame 27 slides inside the connecting pipe rack 19. The two sliding frames 27 sliding towards each other can block the connecting pipe rack 19. The pulling force of the tension spring 28 is less than the pushing force of the spring 23. Therefore, when the sleeve 22 is disassembled, the tension spring 28 will rebound, and the rebound of the tension spring 28 can drive the sliding frame 27 to slide into the inside of the connecting pipe rack 19.

[0031] Please refer to the appendix Figure 6 , a telescopic rod 29 is fixedly connected to the outer wall of the sliding frame 27, and the outer wall of the telescopic rod 29 is fixedly connected to the outer wall of the connecting pipe rack 19; Specifically, the telescopic rod 29 can support the sliding of the sliding frame 27. At the same time, the telescopic rod 29 is located inside the tension spring 28, and the telescopic rod 29 can also limit the tension spring 28.

[0032] Please refer to the appendix Figure 5 , a slider 30 is fixedly connected to the outer wall of the sliding frame 27, and a push block 26 is slidably connected to the outer wall of the slider 30. The outer wall of the push block 26 is fixedly connected to the outer wall of the sleeve 22; Specifically, when installing the sleeve 22, the sleeve 22 slides to drive the push block 26 to slide. The push block 26 can push the sliding frame 27 to slide through the slider 30, so that the sliding frame 27 expands to both sides, realizing the opening of the connecting pipe rack 19.

[0033] In this patent, the linkage between the sliding frame (27), telescopic rod (29), push block (26) and slider (30) can significantly simplify the disassembly and maintenance process of the microchannel heat exchanger. When the operator pushes the sleeve (22), the sleeve (22) drives the push block (26) to slide, and the push block (26) transmits the force to the sliding frame (27) evenly and synchronously through the slider (30), so that the sliding frame (27) can perform a smooth expansion or closing action along both sides of the connecting pipe rack (19). This automatic linkage design not only improves the smoothness of operation, but also effectively prevents jamming, dislocation or local damage caused by uneven human force. The synchronous opening and closing mechanism greatly shortens the time for maintaining and replacing the microchannel plate (21), realizes modular rapid replacement, reduces the equipment downtime cycle, and further improves the operating efficiency of the equipment.

[0034] In this structure, the telescopic rod (29) not only provides guidance and support for the movement of the sliding frame (27), effectively ensuring that the sliding frame (27) always moves smoothly according to the designed trajectory and avoids position deviation during the assembly process, but also provides an accurate positioning reference for each combination and assembly of the connecting pipe rack (19) through its own rigidity and position limiting function. The telescopic rod (29) is located on the inner side of the tension spring (28), so that the elastic force of the tension spring (28) is always in a controlled state, preventing abnormal spring travel or deflection, ensuring that the directions of all components are unified when subjected to force, effectively absorbing and buffering instantaneous force impacts that may occur during operation or assembly, and greatly reducing component damage caused by misoperation, vibration or repeated assembly of the equipment. The structure can also automatically reset the sliding frame (27), ensuring that each disassembly and assembly operation can be restored to the initial state, improving the safety and reliability of the joint seal and the overall system, providing a solid guarantee for long-term stable operation, and extending the service life of the whole machine.

[0035] Please refer to the attached Figure 1 The inner walls of the water inlet channel 1, the water outlet channel 2 and the water exchange channel 13 are all provided with a corrosion-resistant coating, and the corrosion-resistant coating is made of polytetrafluoroethylene material; Specifically, by providing a corrosion-resistant coating on the inner walls of the water inlet channel 1 , the water outlet channel 2 and the water exchange channel 13 , corrosion damage to the heat exchanger can be reduced and the service life of the heat exchanger can be increased.

[0036] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A corrosion-resistant microchannel heat exchanger, comprising a water inlet channel (1), a water outlet channel (2) and a water replacement channel (13), characterized in that, The outer wall of the water inlet channel (1) is fixedly connected with a motor (4). An inlet water pipe (3) is arranged inside the water inlet channel (1). The output end of the motor (4) is fixedly provided with a transmission shaft (5). The outer wall of the transmission shaft (5) is rotatably connected inside the water inlet channel (1) and the water outlet channel (2). The outer wall of the transmission shaft (5) is provided with a first helical fin (6) and a second helical fin (7). The first helical fin (6) is located inside the water inlet channel (1), and the second helical fin (7) is located inside the water outlet channel (2). The pitches of the first helical fin (6) and the second helical fin (7) both gradually increase from top to bottom. The outer wall of the transmission shaft (5) is fixedly connected with a first bevel gear (8). The tooth end of the first bevel gear (8) is meshed and connected with a second bevel gear (9). The outer wall of the second bevel gear (9) is fixedly connected with a rotating shaft (10). The outer wall of the rotating shaft (10) is fixedly connected with an inlet water helical fin (11). Arc-shaped blocks (12) are arranged inside both the water inlet channel (1) and the water outlet channel (2). An outlet water pipe (31) is arranged inside the water outlet channel (2). A fixing component is arranged on the outer wall of the water inlet channel (1).

2. The corrosion-resistant microchannel heat exchanger according to claim 1, wherein The fixing component includes a fixing frame (14). The outer wall of the fixing frame (14) is fixedly connected to the outer walls of the water inlet channel (1), the water outlet channel (2), and the water changing channel (13). Heat insulation blocks (15) are fixedly connected to the outer walls of the water inlet channel (1) and the water outlet channel (2).

3. The corrosion-resistant microchannel heat exchanger according to claim 1, characterized in that, A filter plate (16) is arranged inside the inlet water pipe (3). The inside of the filter plate (16) is rotatably connected to the outer wall of the rotating shaft (10). A scraper (17) is fixedly connected to the outer wall of the rotating shaft (10). The outer wall of the scraper (17) is rotatably connected to the outer wall of the filter plate (16).

4. A corrosion-resistant microchannel heat exchanger according to claim 1, characterized in that, Bell mouths (18) are fixedly connected inside the water inlet channel (1), the water outlet channel (2), and the water changing channel (13). A connecting pipe frame (19) is fixedly connected to the outer wall of the bell mouth (18). A shunt pipe (20) is attached to the outer wall of the connecting pipe frame (19). A microchannel plate (21) is fixedly connected to the outer wall of the shunt pipe (20).

5. The corrosion-resistant microchannel heat exchanger according to claim 4, wherein, A sleeve (22) is slidably connected to the outer wall of the shunt pipe (20). A spring (23) and a sliding rod (24) are fixedly connected to the outer wall of the sleeve (22). The outer wall of the spring (23) is fixedly connected to the outer wall of the shunt pipe (20).

6. The corrosion-resistant microchannel heat exchanger according to claim 5, characterized in that, The outer wall of the sliding rod (24) is slidably connected inside the shunt pipe (20). A handle (25) is fixedly connected to the outer wall of the sliding rod (24).

7. The corrosion-resistant microchannel heat exchanger according to claim 4, wherein A sliding frame (27) is slidably connected inside the connecting pipe frame (19). A tension spring (28) is fixedly connected to the outer wall of the sliding frame (27). The outer wall of the tension spring (28) is fixedly connected to the outer wall of the connecting pipe frame (19).

8. A corrosion-resistant microchannel heat exchanger according to claim 7, wherein An expansion link (29) is fixedly connected to the outer wall of the sliding frame (27). The outer wall of the expansion link (29) is fixedly connected to the outer wall of the connecting pipe frame (19).

9. The corrosion-resistant microchannel heat exchanger according to claim 7, wherein The outer wall of the sliding carriage (27) is fixedly connected with a slider (30), the outer wall of the slider (30) is slidably connected with a push block (26), and the outer wall of the push block (26) is fixedly connected to the outer wall of the sleeve (22).

10. A corrosion-resistant microchannel heat exchanger according to claim 1, characterized in that, The inner walls of the water inlet channel (1), the water outlet channel (2) and the water changing channel (13) are all provided with corrosion-resistant coatings, and the corrosion-resistant coatings use polytetrafluoroethylene materials.

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