Heat pipe heat exchanger for recovering waste heat from flue of water heater

Abstract

The application discloses a heat pipe type heat exchanger for recovering waste heat of a water heater exhaust flue, which comprises an air inlet pipe, a plurality of groups of first connecting frames are fixedly connected inside the air inlet pipe, control cylinders are fixedly connected between the first connecting frames, a push plate is slidably connected inside the control cylinders, an arc-shaped frame is fixedly connected to one side of the push plate, a rack is fixedly connected inside the arc-shaped frame, a gear is meshedly connected to the inner side of the rack, rotating shafts are fixedly connected to the two sides of the gear, first connecting boxes are fixedly connected to the two sides of the air inlet pipe, first bevel gears are fixedly connected to the other ends of the rotating shafts penetrating through the first connecting boxes, second bevel gears are meshedly connected to one side of the first bevel gears, first threaded rods are fixedly connected to the tails of the second bevel gears, ear connectors are threadedly connected to the outer sides of the first threaded rods, a communication groove is formed in one side of the first connecting box, and sealing platforms are fixedly connected to the ear connectors penetrating through the communication groove.

Description

Technical Field

[0001] This invention relates to the technical field of waste heat recovery and heat exchange equipment for water heaters, specifically a heat pipe heat exchanger for waste heat recovery from water heater flue. Background Technology

[0002] Current traditional water heater exhaust duct waste heat recovery heat exchangers are unable to meet the demand for efficient and stable waste heat recovery. The gas pressure is uncontrollable and the heat exchange efficiency is low: there is no gas pressure adaptive adjustment structure, the airflow velocity is unstable when the exhaust gas pressure fluctuates, the waste heat recovery is insufficient, and the heat exchange efficiency decays rapidly. Summary of the Invention

[0003] The purpose of this invention is to provide a heat pipe heat exchanger for waste heat recovery from the flue gas duct of a water heater, so as to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a heat pipe heat exchanger for waste heat recovery from a water heater exhaust duct, comprising an air inlet pipe, wherein a plurality of first connecting frames are fixedly connected inside the air inlet pipe, a control cylinder is fixedly connected between the first connecting frames, a push plate is slidably connected inside the control cylinder, an arc-shaped frame is fixedly connected to one side of the push plate, a rack is fixedly connected inside the arc-shaped frame, a gear is meshed with the inner side of the rack, a rotating shaft is fixedly connected to both sides of the gear, first connecting boxes are fixedly connected to both sides of the air inlet pipe, a first bevel gear is fixedly connected to the other end of the rotating shaft through the first connecting box, a second bevel gear is meshed with one side of the first bevel gear, a first threaded rod is fixedly connected to the tail of the second bevel gear, and the first threaded rod is further... One end is rotatably connected to the inner wall of the first connecting box. The outer side of the first threaded rod is threaded with a lug. A connecting groove is opened on one side of the first connecting box. The lug penetrates the connecting groove and is fixedly connected to a sealing platform. A sliding groove is opened on the outer side of the air intake pipe. Several sets of exhaust holes are opened on the outer side of the sliding groove. The sealing platform is slidably connected to the inner wall of the sliding groove. A sliding sleeve is fixedly connected to one side of the sealing platform. The sliding sleeve is slidably connected to the outer side of the air intake pipe. A second connecting box is fixedly connected inside the control cylinder. Two sets of sliding rods are fixedly connected to one side of the push plate. The sliding rods penetrate into the second connecting box and are slidably connected to a first sliding piece. The first sliding piece is slidably connected inside the second connecting box. A first spring is fixedly connected between the other side of the first sliding piece and the inner wall of the second connecting box.

[0005] Preferably, an air collection box is fixedly connected to one side of the air inlet pipe, and a heat exchanger is fixedly connected to the other side of the air collection box.

[0006] Preferably, the first threaded rod on one side penetrates the first connecting box and is fixedly connected to a connecting rod. The other end of the connecting rod is fixedly connected to a rotating plate. One end of the rotating plate is internally threaded to a second threaded rod. The tail of the second threaded rod is rotatably connected to a third sliding plate. The third sliding plate is slidably connected to the outside of the connecting rod. A toothed ring is fixedly connected to one side of the third sliding plate. A toothed groove for the toothed ring is opened on one side of the first connecting box.

[0007] Preferably, four sets of first mounting slots are provided on one side of the air intake pipe, and mounting plates are fixedly connected inside the first mounting slots, and filter plates are fixedly connected between the mounting plates.

[0008] Preferably, two sets of second mounting slots are provided on one side of the air intake pipe. A mounting plate is fixedly connected inside the second mounting slot. A protective cover is fixedly connected inside the mounting plate. A rotating cylinder is rotatably connected inside the protective cover. A rotating disk is fixedly connected to one side of the rotating cylinder. Several sets of mounting rods are fixedly connected to the outside of the rotating disk. Fan blades are fixedly connected to the outside of the mounting rods. A rectangular rod is slidably connected inside the rotating cylinder. A scraper is fixedly connected to the other end of the rectangular rod.

[0009] Preferably, a second sliding plate is fixedly connected to the other end of the rectangular rod, the second sliding plate is slidably connected inside the rotating cylinder, and a second spring is fixedly connected between the second sliding plate and the inner wall of the rotating cylinder.

[0010] Preferably, a flange is fixedly connected to the outer side of one end of the air intake pipe.

[0011] Preferably, the sealing platform has a sealing groove inside, and a sealing ring is fitted inside the sealing groove.

[0012] Compared with the prior art, the beneficial effects of the present invention are: 1. The present invention utilizes the operating logic of a push plate, a first spring, a rack and pinion, a bevel gear, a threaded rod, and a sealing platform: the airflow pressure pushes the push plate to slide, and through multi-stage transmission, it drives the sealing platform to change the number of exposed exhaust holes. The air pressure and spring pressure are dynamically balanced, stabilizing the airflow pressure blowing onto the heat exchanger. This structure allows the heat exchanger to adapt to different exhaust gas pressure conditions, avoiding excessively high air pressure leading to excessively fast airflow velocity and insufficient heat exchange, or excessively low air pressure leading to insufficient power of the heat exchange medium. Compared with traditional heat exchangers without regulation, the waste heat recovery efficiency and heat exchange stability are improved. 2. This invention utilizes the operating logic of fan blades, a rotating cylinder, a rectangular rod, a scraper, and a second spring: airflow drives the fan blades to rotate, which in turn drives the scraper to rotate synchronously. The second spring continuously pushes the scraper to press against the filter plate, automatically scraping away impurities. This structure integrates filter plate filtration and automatic cleaning, reducing clogging rates, eliminating the need for frequent disassembly of the entire machine, shortening maintenance time, and significantly reducing maintenance labor costs. 3. The present invention utilizes the operating logic of a rotating plate, a second threaded rod, a toothed ring, and a toothed groove: the rotating plate individually fine-tunes the opening of the exhaust hole, the second threaded rod pushes the toothed ring to mesh with the toothed groove, locking the first threaded rod and fixing the adjustment state. This structure supports dual-mode switching between adaptive adjustment and fixed opening, adapting to the stable heat exchange requirements under specific working conditions. After locking, it has strong anti-vibration capability and no drift in the adjustment state. Compared with the traditional non-locking structure, the operational reliability is improved. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a three-dimensional cross-sectional view of the present invention; Figure 3 This is a three-dimensional cross-sectional view of the present invention; Figure 4 This is an enlarged view of the structure at point A of the present invention; Figure 5 This is an enlarged view of the structure at point B of the present invention; Figure 6 This is an enlarged view of the structure at point C in this invention; Figure 7 This is an enlarged view of the structure at point D in this invention.

[0014] In the diagram: 1. Heat exchanger; 2. Gas collection box; 3. Inlet pipe; 4. First connecting frame; 5. Control cylinder; 6. Push plate; 7. Arc frame; 8. Rack; 9. Gear; 10. Rotating shaft; 11. First connecting box; 12. First bevel gear; 13. Second bevel gear; 14. First threaded rod; 15. Communicating groove; 16. Lug; 17. Sliding groove; 18. Exhaust port; 19. Sliding sleeve; 20. Sealing platform; 21. Sealing groove; 22. Sealing ring; 23. Second connecting box; 24. Sliding rod; 25. First sliding plate; 26. First spring; 27. Connecting rod; 28. Rotating plate; 29. ​​Second threaded rod; 30. Third sliding plate; 31. Gear ring; 32. Gear groove; 33. Flange; 34. First mounting groove; 35. Mounting plate; 36. Filter plate; 37. Second mounting groove; 38. Mounting plate; 39. Protective cover; 40. Rotating cylinder; 41. Rotating disk; 42. Mounting rod; 43. Fan blade; 44. Rectangular rod; 45. Scraper; 46. Second sliding plate; 47. Second spring. Detailed Implementation

[0015] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0016] Please see Figure 1-7 This invention provides a technical solution: a heat pipe heat exchanger for waste heat recovery from a water heater exhaust duct: including an air inlet pipe 3, with several sets of first connecting frames 4 fixedly connected inside the air inlet pipe 3 by welding, and control cylinders 5 fixedly connected inside the first connecting frames 4 by welding, and a push plate 6 slidably connected inside the control cylinder 5 by clearance fit, used to sense air pressure and transmit power, an arc-shaped frame 7 fixedly connected to one side of the push plate 6 by welding, and a rack 8 fixedly connected inside the arc-shaped frame 7 by welding, with gears 9 meshing inside the rack 8, and gears 9 on both sides. A rotating shaft 10 is fixedly connected via a key. First connecting boxes 11 are fixedly connected to both sides of the intake pipe 3 via welding. The rotating shaft 10 passes through the first connecting box 11 via a deep groove ball bearing and is fixedly connected to a first bevel gear 12 via a key. A second bevel gear 13 is meshed with one side of the first bevel gear 12. A first threaded rod 14 is fixedly connected to the tail of the second bevel gear 13 via welding. The other end of the first threaded rod 14 is rotatably connected to the inner wall of the first connecting box 11 via a deep groove ball bearing. A lug is threadedly connected to the outer side of the first threaded rod 14. 16. A rectangular connecting groove 15 is provided on one side of the first connecting box 11. The lug 16 penetrates the connecting groove 15 and is fixedly connected to a sealing platform 20 by welding. An annular sliding groove 17 is provided on the outer side of the air intake pipe 3. Several sets of circular exhaust holes 18 are provided on the outer side of the sliding groove 17 for adjusting the airflow opening. The sealing platform 20 is slidably connected to the inner wall of the sliding groove 17 with a clearance fit to cover or expose the exhaust holes 18. A sliding sleeve 19 is fixedly connected to one side of the sealing platform 20 by welding. The sliding sleeve 19 is slidably connected to the outer side of the air intake pipe 3 with a clearance fit to enhance the airflow. The sealing platform 20 has sliding stability. Inside the control cylinder 5, a second connecting box 23 is fixedly connected by welding. On one side of the push plate 6, two sets of sliding rods 24 are fixedly connected by welding. The sliding rods 24 penetrate into the second connecting box 23 through clearance fit and are fixedly connected to a first sliding piece 25 by welding. The first sliding piece 25 is slidably connected to the inside of the second connecting box 23 through clearance fit. On the other side of the first sliding piece 25, a first spring 26 is fixedly connected to the inner wall of the second connecting box 23 by spot welding. This spring is used to control the reset and pressure adaptation of the push plate 6. One side of the air inlet pipe 3 is fixedly connected to the air collection box 2 via a flange, which is used to evenly distribute the airflow. The other side of the air collection box 2 is fixedly connected to the heat exchanger 1 via a flange, which is used to recover the exhaust waste heat. One threaded rod 14 penetrates the first connecting box 11 and is fixedly connected to a connecting rod 27 by welding. The other end of the connecting rod 27 is fixedly connected to a rotating plate 28 by welding for manual control of the first threaded rod 14. One end of the rotating plate 28 is internally connected to a second threaded rod 29 by thread. The tail of the second threaded rod 29 is rotatably connected to a third sliding plate 30 by a deep groove ball bearing. The third sliding plate 30 is slidably connected to the outside of the connecting rod 27 by clearance fit. One side of the third sliding plate 30 is fixedly connected to a toothed ring 31 by welding. The first connecting box 11 has a toothed groove 32 that matches the toothed ring 31, and locking is achieved by meshing. Four sets of rectangular first mounting slots 34 are provided on one side of the air intake pipe 3. Mounting plates 35 are fixedly connected to the inside of the first mounting slots 34 by bolts. Filter plates 36 are fixedly connected between the mounting plates 35 by bolts to filter impurities in the exhaust smoke. Two sets of rectangular second mounting slots 37 are provided on one side of the air intake pipe 3. The mounting plate 38 is fixedly connected to the inside of the second mounting slot 37 by bolts. The protective cover 39 is fixedly connected to the inside of the mounting plate 38 by welding to protect the internal components. The rotating cylinder 40 is rotatably connected to the inside of the protective cover 39 by a deep groove ball bearing. The rotating disk 41 is fixedly connected to one side of the rotating cylinder 40 by welding. Several sets of mounting rods 42 are fixedly connected to the outside of the rotating disk 41 by welding. The fan blades 43 are fixedly connected to the outside of the mounting rods 42 by welding to drive the rotation by airflow. The rectangular rod 44 is slidably connected to the inside of the rotating cylinder 40 by clearance fit. The scraper 45 is fixedly connected to the other end of the rectangular rod 44 by welding to clean impurities. The other end of the rectangular rod 44 is fixedly connected to a second sliding plate 46 by welding. The second sliding plate 46 is slidably connected to the inside of the rotating cylinder 40 by clearance fit. The second sliding plate 46 and the inner wall of the rotating cylinder 40 are fixedly connected to a second spring 47 by spot welding. Under normal conditions, the scraper 45 is pushed to press the filter plate 36. A flange 33 is fixedly connected to the outer side of one end of the air inlet pipe 3 by welding, which is used to fix the connection with the flue of the water heater 1. The sealing platform 20 has a sealing groove 21 inside, and a sealing ring 22 is fitted inside the sealing groove 21 to improve the sealing performance between the sealing platform 20 and the sliding groove 17.

[0017] Working principle: When using this invention: the air inlet pipe 3 is fixedly connected to the water heater exhaust duct through the flange 33 to ensure good sealing; the air collection box 2 and the heat exchanger are connected in sequence through the flange, and the connection status of each component is checked.

[0018] Waste heat-containing airflow from the water heater's exhaust duct flows into the air inlet pipe 3, first passing through the filter plate 36 to filter impurities. The airflow pressure pushes the push plate 6 to slide along the control cylinder 5, compressing the first spring 26. The sliding rod 24 and the first sliding plate 25 move synchronously. The push plate 6 drives the arc-shaped frame 7 and rack 8 to move, and the rack 8 meshes with the drive gear 9 and rotating shaft 10 to rotate. The rotating shaft 10 drives the first bevel gear 12 to rotate, meshing with the second bevel gear 13 and the first threaded rod 14 to rotate. The first threaded rod 14 drives the lug 16 to rotate along the connecting... The sliding groove 15 moves, causing the sealing platform 20 and the sliding sleeve 19 to move along the sliding groove 17, changing the amount of exhaust hole 18 exposed. The greater the air pressure, the farther the push plate 6 moves, and the more exhaust hole 18 is exposed, discharging some airflow to reduce the air pressure. When the air pressure decreases, the first spring 26 returns to its original position, and the sealing platform 20 and the sliding sleeve 19 block the exhaust hole 18, increasing the airflow blowing towards the heat exchanger 1 and achieving adaptive and stable air pressure control. After being evenly distributed by the air collection box 2, the airflow blows towards the heat exchanger 1, making full contact with the heat exchange medium and recovering waste heat.

[0019] To fix the opening of the exhaust port 18, rotate the rotating plate 28 to drive the first threaded rod 14 on one side to rotate independently, and fine-tune the position of the sealing platform 20 to the target opening; rotate the second threaded rod 29 to push the third sliding plate 30 and the toothed ring 31 to slide along the connecting rod 27 until the toothed ring 31 is embedded in the tooth groove 32 of the first connecting box 11, engaging and locking the first threaded rod 14 to ensure that the opening of the exhaust port 18 does not change with air pressure fluctuations; when unlocking is required, rotate the second threaded rod 29 in the opposite direction, and the toothed ring 31 disengages from the tooth groove 32, restoring the air pressure adaptive adjustment mode.

[0020] When the airflow passes through the intake pipe 3, it drives the fan blade 43 to rotate, which in turn drives the mounting rod 42, the rotating disk 41 and the rotating cylinder 40 to rotate synchronously. The rotating cylinder 40 drives the rectangular rod 44 and the scraper 45 to rotate. The second spring 47 pushes the scraper 45 to keep pressing the filter plate 36. During the rotation, the impurities attached to the surface of the filter plate 36 are scraped off to avoid clogging. The impurities fall with the airflow or gravity and can be discharged through subsequent cleaning.

[0021] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus.

[0022] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A heat pipe heat exchanger for waste heat recovery from a water heater exhaust duct, comprising an inlet pipe (3), characterized in that: The intake pipe (3) is fixedly connected to several sets of first connecting frames (4). A control cylinder (5) is fixedly connected between the first connecting frames (4). A push plate (6) is slidably connected inside the control cylinder (5). An arc frame (7) is fixedly connected to one side of the push plate (6). A rack (8) is fixedly connected inside the arc frame (7). A gear (9) is meshed inside the rack (8). A rotating shaft (10) is fixedly connected to both sides of the gear (9). A first connecting box (11) is fixedly connected to both sides of the intake pipe (3). A first bevel gear (12) is fixedly connected to the other end of the rotating shaft (10) through the first connecting box (11). A second bevel gear (13) is meshed to one side of the first bevel gear (12). A first threaded rod (14) is fixedly connected to the tail of the second bevel gear (13). The other end of the first threaded rod (14) is rotatably connected to the inner wall of the first connecting box (11). A lug is threaded to the outer side of the first threaded rod (14). (16) A connecting groove (15) is provided on one side of the first connecting box (11). The ear (16) penetrates the connecting groove (15) and is fixedly connected to a sealing platform (20). A sliding groove (17) is provided on the outside of the air inlet pipe (3). Several sets of exhaust holes (18) are provided on the outside of the sliding groove (17). The sealing platform (20) is slidably connected to the inner wall of the sliding groove (17). A sliding sleeve (19) is fixedly connected on one side of the sealing platform (20). The sliding sleeve (19) is slidably connected to the outside of the air inlet pipe (3). A second connecting box (23) is fixedly connected inside the control cylinder (5). Two sets of sliding rods (24) are fixedly connected on one side of the push plate (6). The sliding rod (24) penetrates to the second connecting box (23) and is slidably connected to a first sliding piece (25). The first sliding piece (25) is slidably connected inside the second connecting box (23). A first spring (26) is fixedly connected between the other side of the first sliding piece (25) and the inner wall of the second connecting box (23).

2. The heat pipe heat exchanger for waste heat recovery from water heater flue gas ducts according to claim 1, characterized in that: The air inlet pipe (3) is fixedly connected to a gas collection box (2) on one side, and a heat exchanger (1) is fixedly connected to the other side of the gas collection box (2).

3. The heat pipe heat exchanger for waste heat recovery from water heater flue gas ducts according to claim 1, characterized in that: One side of the first threaded rod (14) penetrates the first connecting box (11) and is fixedly connected to the connecting rod (27). The other end of the connecting rod (27) is fixedly connected to the rotating plate (28). One end of the rotating plate (28) is internally threaded to the second threaded rod (29). The tail of the second threaded rod (29) is rotatably connected to the third sliding plate (30). The third sliding plate (30) is slidably connected to the outside of the connecting rod (27). One side of the third sliding plate (30) is fixedly connected to the toothed ring (31). The first connecting box (11) has a toothed groove (32) that matches the toothed ring (31) on one side.

4. The heat pipe heat exchanger for waste heat recovery from water heater flue gas ducts according to claim 1, characterized in that: The intake pipe (3) has four sets of first mounting slots (34) on one side. Mounting plates (35) are fixedly connected inside the first mounting slots (34), and filter plates (36) are fixedly connected between the mounting plates (35).

5. The heat pipe heat exchanger for waste heat recovery from water heater flue gas ducts according to claim 1, characterized in that: Two sets of second mounting slots (37) are provided on one side of the air intake pipe (3). A mounting plate (38) is fixedly connected inside the second mounting slot (37). A protective cover (39) is fixedly connected inside the mounting plate (38). A rotating cylinder (40) is rotatably connected inside the protective cover (39). A rotating disk (41) is fixedly connected to one side of the rotating cylinder (40). Several sets of mounting rods (42) are fixedly connected to the outside of the rotating disk (41). A fan blade (43) is fixedly connected to the outside of the mounting rod (42). A rectangular rod (44) is slidably connected inside the rotating cylinder (40). A scraper (45) is fixedly connected to the other end of the rectangular rod (44).

6. The heat pipe heat exchanger for waste heat recovery from water heater flue gas ducts according to claim 5, characterized in that: The other end of the rectangular rod (44) is fixedly connected to a second sliding piece (46), which is slidably connected inside the rotating cylinder (40). A second spring (47) is fixedly connected between the second sliding piece (46) and the inner wall of the rotating cylinder (40).

7. The heat pipe heat exchanger for waste heat recovery from water heater flue gas ducts according to claim 1, characterized in that: A flange (33) is fixedly connected to the outer side of one end of the air intake pipe (3).

8. The heat pipe heat exchanger for waste heat recovery from water heater flue gas ducts according to claim 1, characterized in that: The sealing platform (20) has a sealing groove (21) inside, and a sealing ring (22) is fitted inside the sealing groove (21).

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