An elliptical fin-tube heat exchanger

Abstract

The present invention relates to the technical field of elliptical fin-tube heat exchange, and discloses an elliptical fin-tube heat exchanger, comprising a protective shell, the exterior of the protective shell being fixedly connected to an air delivery assembly, the top end of the inner wall of the protective shell being fixedly connected to a fixed shell, the left end of the fixed shell being rotatably connected to a rotating rod, the outer front end of the rotating rod being fixedly connected to a transmission assembly, the interior of the fixed shell being rotatably connected to a plurality of fin tubes, the exterior of the protective shell being fixedly connected to a material delivery assembly, the exterior of the rotating rod being fixedly connected to a plurality of windward blades, and the interior of the protective shell being fixedly connected to a windward box. In the present invention, the fin tubes are linked to rotate by means of a rotating rod, a transmission gear set, a transmission gear, a transmission gear, and a rotating gear. The elliptical fin tubes continuously change their contact area and angle with the airflow during rotation, thereby achieving the beneficial effects of enhancing heat exchange efficiency and improving the heat exchange effect between the airflow and the medium, and allowing the heat exchanger to efficiently complete heat transfer during operation.

Description

Technical Field

[0001] The invention relates to the technical field of elliptical fin-tube heat exchange, in particular to an elliptical fin-tube heat exchanger. Background Art

[0002] Elliptical fin-and-tube heat exchangers are widely used in industrial waste heat recovery, HVAC, power cooling, and other scenarios. They require efficient heat exchange and stable operation to meet the needs of temperature control and energy conservation and consumption reduction. For example, they are used for medium heat exchange in chemical production, or for heat transfer between air and refrigerant in building air-conditioning systems.

[0003] However, some existing elliptical fin-tube heat exchangers, when in use, usually rely on fixed fins to exchange heat with the airflow, with fixed fin angles and positions. However, this does not take into account the fact that localized heat exchange dead zones are easily formed when the airflow passes through, and that dust and scaling on the fin surface after long-term operation will reduce heat exchange efficiency. Some with rotating fins, due to their simple transmission structure, are difficult to achieve synchronous and stable linkage of multiple fins, resulting in inconsistent fin rotation, an inability to evenly enhance heat exchange, and an impact on the overall heat exchange effect. This makes it difficult to meet the requirements for efficient and stable heat exchange, restricting their application in demanding scenarios.

[0004] Therefore, an elliptical fin-tube heat exchanger is proposed to address the above problems. Summary of the Invention

[0005] In order to make up for the above shortcomings, the present invention provides an elliptical fin-tube heat exchanger, which aims to improve the problem that some devices in the existing technology do not take into account the formation of local heat exchange dead corners when air flows through, and the accumulation of dust and scaling on the fin surface after long-term operation will reduce the heat exchange efficiency.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] The top of the inner wall of the protective shell is fixedly connected to the fixed shell, the left end of the fixed shell is rotatably connected to the rotating rod, the outer front end of the rotating rod is fixedly connected to the transmission assembly, the interior of the fixed shell is rotatably connected to a plurality of fin tubes, the outside of the protective shell is fixedly connected to the feeding assembly, the outside of the rotating rod is fixedly connected to a plurality of windward blades, the interior of the protective shell is fixedly connected to a windward box, the bottom end of the windward box is fixedly connected to a plurality of air outlet nozzles, the front end of the rotating rod is fixedly connected to the rotating disk, the front end of the rotating disk is fixedly connected to the rotating disk, the outside of the rotating disk is slidably connected to an air pumping assembly, the left end of the air pumping assembly is fixedly connected to a water storage pipe, the rear end of the water storage pipe is fixedly connected to the conveying assembly, and the bottom end of the protective shell is fixedly connected to the water tank;

[0008] As a further description of the above technical solution:

[0009] The air delivery assembly includes an air inlet and an air outlet, the right end of the air inlet is fixedly connected to the left end of the protective shell, and the left end of the air outlet is fixedly connected to the right end of the protective shell;

[0010] As a further description of the above technical solution:

[0011] The transmission assembly includes a transmission gear, a plurality of transmission gears and a plurality of rotating gears, the interior of the transmission gear is fixedly connected to the exterior of the rotating rod, the interiors of the plurality of transmission gears are respectively fixedly connected to the exterior front ends of some of the finned tubes, and the interiors of the plurality of rotating gears are respectively fixedly connected to the exterior front ends of another portion of the finned tubes, the transmission gear is meshed with one of the transmission gears, the plurality of transmission gears are meshed with each other, the transmission gear is meshed with the rotating gear, and the plurality of rotating gears are meshed with each other;

[0012] As a further description of the above technical solution:

[0013] The feeding assembly includes a connecting elbow, a feed pipe, and a discharge pipe, wherein the outer portion of the connecting elbow is fixedly connected to the interior of the protective shell, the outer portion of the feed pipe is fixedly connected to the interior of the protective shell, and the outer portion of the discharge pipe is fixedly connected to the interior of the protective shell;

[0014] As a further description of the above technical solution:

[0015] The pumping assembly includes a fixed rod, the rear end of the fixed rod is fixedly connected to the front end of the rotating disk, the outer portion of the fixed rod is slidably connected to a limit box, the bottom end of the limit box is fixedly connected to a sliding rod, the bottom end of the sliding rod is fixedly connected to a rubber sheet, the outer portion of the rubber sheet is slidably connected to an air cylinder, and the left end of the air cylinder is fixedly connected to a connecting pipe;

[0016] As a further description of the above technical solution:

[0017] The delivery assembly includes a water outlet pipe, the rear end of the water storage pipe is fixedly connected to the front end of the water outlet pipe, the rear end of the water storage pipe is fixedly connected to the water inlet pipe, the inside of the water inlet pipe and the water outlet pipe are both slidably connected to rubber heads, the outside of the rubber head is fixedly connected to a spring, and the other ends of the two springs are respectively fixedly connected to the inside of the water inlet pipe and the water outlet pipe;

[0018] As a further description of the above technical solution:

[0019] The outside of the connecting elbow is fixedly connected to a part of the limiting tube, and the inside of the other part of the limiting tube is respectively fixedly connected to the outside of the feed tube and the discharge tube. The inside of the limiting tube is rotatably connected to two rotating tubes, and the two rotating tubes are rotatably connected. The inside of the rotating tube is rotatably connected to two rubber blocks, the inside of the rotating tube is fixedly connected to a sealing block, and the insides of the two rotating tubes are slidably connected to a gasket;

[0020] As a further description of the above technical solution:

[0021] The outside of the sliding rod is slidably connected to the inside of the gas cylinder, and the left end of the connecting pipe is fixedly connected to the right end of the water storage pipe.

[0022] The present invention has the following beneficial effects:

[0023] In the present invention, the finned tubes are rotated in conjunction with a rotating rod, a transmission gear set, a transmission gear, a transmission gear, and a rotating gear. The elliptical finned tubes continuously change their contact area and angle with the airflow during rotation, achieving the beneficial effects of enhancing heat exchange efficiency and improving the heat exchange effect between the airflow and the medium, allowing the heat exchanger to efficiently complete heat transfer during operation. In the present invention, the pumping assembly is driven by a rotating disk, a fixed rod, a limit box, etc., and cooperates with the water storage pipe and conveying assembly to form a water circulation. The wind and water forces are used to synergistically drive the stable rotation of the windward blades, thereby enhancing the rotational stability of the finned tubes, assisting internal heat exchange, and ensuring the long-term and efficient operation of the heat exchanger. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a three-dimensional schematic diagram of an elliptical fin-tube heat exchanger proposed by the present invention;

[0025] Figure 2 This is a structural schematic diagram of a connecting elbow of an elliptical fin-tube heat exchanger proposed by the present invention;

[0026] Figure 3 This is a schematic structural diagram of a fixed shell of an elliptical fin-tube heat exchanger proposed by the present invention;

[0027] Figure 4 This is a schematic structural diagram of the finned tubes of an elliptical fin-tube heat exchanger proposed by the present invention;

[0028] Figure 5 This is a schematic structural diagram of a windward fin of an elliptical fin-tube heat exchanger proposed by the present invention;

[0029] Figure 6 This is a schematic structural diagram of an air cylinder of an elliptical fin-tube heat exchanger proposed by the present invention;

[0030] Figure 7This is a schematic structural diagram of a water storage tube of an elliptical fin-tube heat exchanger proposed by the present invention;

[0031] Figure 8 This is a structural schematic diagram of a limiting tube of an elliptical fin-tube heat exchanger proposed by the present invention.

[0032] Legend:

[0033] 1. Protective shell; 2. Air inlet; 3. Air outlet; 4. Fixed shell; 5. Rotating rod; 6. Transmission gear; 7. Fin tube; 8. Transmission gear; 9. Rotating gear; 10. Connecting elbow; 11. Feed pipe; 12. Discharge pipe; 13. Windward plate; 14. Windward box; 15. Exhaust nozzle; 16. Rotating disk; 17. Fixed rod; 18. Limit box; 19. Sliding rod; 20. Rubber sheet; 21. Air cylinder; 22. Connecting pipe; 23. Water storage pipe; 24. Water outlet pipe; 25. Water inlet pipe; 26. Spring; 27. Rubber head; 28. Rotating pipe; 29. ​​Rubber block; 30. Sealing block; 31. Gasket; 32. Limiting pipe. DETAILED DESCRIPTION

[0034] 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. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0035] Reference Figures 1 to 4, an embodiment provided by the present invention: an elliptical fin-tube heat exchanger, including a protective shell 1, the protective shell 1 serves as the main frame of the heat exchanger, provides installation support and space protection for all internal components, isolates external interference such as dust and moisture, ensures that the heat exchange process is carried out in a stable environment, and is the basic bearing component of the overall structure of the device. The outside of the protective shell 1 is fixedly connected to an air supply component, and the air supply component includes an air inlet 2 and an air outlet 3. The air inlet 2 guides the external air flow to be heat exchanged into the interior of the protective shell 1, and the air outlet 3 discharges the air flow that has completed the heat exchange. The two cooperate to form an air flow path for gas-liquid / gas-gas exchange The heat provides the necessary airflow conditions, the right end of the air inlet 2 is fixedly connected to the left end of the protective shell 1, the left end of the air outlet 3 is fixedly connected to the right end of the protective shell 1, and the top of the inner wall of the protective shell 1 is fixedly connected with a fixed shell 4. The fixed shell 4 is fixed to the top of the inner wall of the protective shell 1 to provide an installation fulcrum for the core transmission and heat exchange components such as the rotating rod 5 and the fin tube 7 to ensure the relative position of each component is accurate, and to ensure the stability and orderliness of the power conduction and heat exchange process. The left end of the fixed shell 4 is rotatably connected with the rotating rod 5, and the rotating rod 5 passes through the power conduction shaft of the fixed shell 4. The rotating disk 16 is manually driven or passively received to impact the windward sheet 13 with the airflow. The power is used to realize rotation and transmit the power to the transmission assembly, which is the core power source for driving the fin tube 7 to rotate. The external front end of the rotating rod 5 is fixedly connected to the transmission assembly. The transmission assembly includes a transmission gear 6, a plurality of transmission gears 8 and a plurality of rotating gears 9. The interior of the transmission gear 6 is fixedly connected to the outside of the rotating rod 5, and the interiors of the plurality of transmission gears 8 are respectively fixedly connected to the external front ends of some fin tubes 7. The interiors of the plurality of rotating gears 9 are respectively fixedly connected to the front ends of the other part of the fin tube 7. The transmission gear 6 is meshed with one of the transmission gears 8, and the plurality of transmission gears 8 are meshed with each other. The transmission gear 8 and the rotating gear 9 is a meshing connection, and multiple rotating gears 9 are meshing connections. The transmission component transmits the rotational power of the rotating rod 5 to all the finned tubes 7 synchronously through the gear meshing relationship, so that multiple groups of finned tubes 7 can achieve linked rotation, ensuring the consistency and coordination of the rotation of the finned tubes 7, and providing power transmission guarantee for uniform and enhanced heat exchange. The internal rotation of the fixed shell 4 is connected with multiple finned tubes 7. Heat exchange medium such as water and heat transfer oil circulates inside the finned tubes 7, and the outside is in contact with the airflow through elliptical fins. The contact area and angle between the fins and the airflow are continuously changed during rotation, breaking the dead angle of airflow flow and enhancing heat exchange efficiency. It is a core functional component for achieving efficient heat exchange.

[0036] Reference Figure 2 and Figure 3The outside of the protective shell 1 is fixedly connected with a feeding assembly, which includes a connecting elbow 10, a feed pipe 11 and a discharge pipe 12. The outside of the connecting elbow 10 is fixedly connected to the inside of the protective shell 1, the outside of the feed pipe 11 is fixedly connected to the inside of the protective shell 1, and the outside of the discharge pipe 12 is fixedly connected to the inside of the protective shell 1. The feed pipe 11 in the feeding assembly introduces the medium to be exchanged with heat, the connecting elbow 10 evenly distributes the medium to each finned tube 7, and the discharge pipe 12 collects the medium that has completed the heat exchange and discharges it, constructing a medium circulation closed loop to ensure the input, distribution and output of the heat exchange medium. The outside of the rotating rod 5 is fixedly connected with a plurality of windward blades 13, which are fixed to the outside of the rotating rod 5. When impacted by the airflow, a driving force is generated to assist the rotating rod 5 in passive rotation to achieve zero The self-driven rotation of the additional power source reduces energy consumption and enhances the diversity of power input. The interior of the protective shell 1 is fixedly connected to a windward box 14, and the bottom end of the windward box 14 is fixedly connected to a plurality of air outlet nozzles 15. The windward box 14 gathers the airflow entering the protective shell 1, and the airflow is evenly dispersed and sprayed onto the surface of the fin tube 7 through the bottom air outlet nozzle 15, avoiding uneven heat exchange caused by concentrated airflow and improving the uniformity and sufficiency of the contact between the fin and the airflow. The front end of the rotating rod 5 is fixedly connected to a rotating disk 16, and the rotating disk 16 is exposed to the manual operation part of the protective shell 1. By driving the rotating rod 5 to rotate, manual intervention control of the rotation of the fin tube 7 is realized, which is convenient for equipment debugging, startup and active adjustment under specific working conditions. The front end of the rotating disk 16 is fixedly connected to the rotating disk 16.

[0037] Reference Figures 5 to 7 The outer sliding connection of the rotating disk 16 is provided with an air pumping assembly, which includes a fixed rod 17, the rear end of the fixed rod 17 is fixedly connected to the front end of the rotating disk 16, the outer sliding connection of the fixed rod 17 is connected to the limit box 18, the bottom end of the limit box 18 is fixedly connected to a sliding rod 19, the bottom end of the sliding rod 19 is fixedly connected to a rubber sheet 20, the outer sliding connection of the rubber sheet 20 is provided with an air cylinder 21, and the left end of the air cylinder 21 is fixedly connected to a connecting pipe 22. When the air pumping assembly rotates with the rotating disk 16, the sliding rod 19 is driven to reciprocate in the air cylinder 21 through the fixed rod 17, and the sealing characteristics of the rubber sheet 20 are used to realize the air pumping function, and the compressed gas is input into the water storage pipe 23 through the connecting pipe 22 to provide a power source for the self-cleaning system. The left end of the air pumping assembly is fixedly connected to a water storage pipe 23, which stores clean water. Under the action of the air pressure input by the air pumping assembly, the water is pushed to flow through the water outlet pipe 24 and spray out to impact the windward sheet 13.

[0038] Reference Figure 7The rear end of the water storage pipe 23 is fixedly connected to a conveying assembly, and the bottom end of the protective shell 1 is fixedly connected to a water tank. The water tank is fixed to the bottom end of the protective shell 1 and serves as a storage container for clean water. It is connected to the water storage pipe 23 through the water inlet pipe 25 to provide water for the self-cleaning system to ensure the continuous operation of the cleaning function. The conveying assembly includes a water outlet pipe 24. The rear end of the water storage pipe 23 is fixedly connected to the front end of the water outlet pipe 24. The rear end of the water storage pipe 23 is fixedly connected to the water inlet pipe 25. The outer sliding connection of the sliding rod 19 is on the air cylinder. Inside the heat exchanger 21, the left end of the connecting pipe 22 is fixedly connected to the right end of the water storage pipe 23. The insides of the water inlet pipe 25 and the water outlet pipe 24 are slidably connected to rubber heads 27. The outsides of the rubber heads 27 are fixedly connected to springs 26. The other ends of the two springs 26 are respectively fixedly connected to the insides of the water inlet pipe 25 and the water outlet pipe 24. The conveying assembly uses air pressure to push the water flow out to achieve self-cleaning of the inside of the heat exchanger. At the same time, the springs 26 and the rubber heads 27 cooperate to achieve automatic water replenishment to maintain a continuous supply of clean water.

[0039] Reference Figure 4 and Figure 8 The outside of the connecting elbow 10 is fixedly connected with a part of the limiting tube 32, and the inside of the other part of the limiting tube 32 is fixedly connected to the outside of the feed pipe 11 and the discharge pipe 12 respectively. The inside of the limiting tube 32 is rotatably connected to two rotating tubes 28, and the two rotating tubes 28 are rotatably connected. The inside of the rotating tube 28 is rotatably connected to two rubber blocks 29, and the inside of the rotating tube 28 is fixedly connected with a sealing block 30. The inside of the two rotating tubes 28 is slidably connected with a gasket 31. The limiting tube 32 reinforces the pipeline connection of the feeding assembly to prevent the pipeline from loosening due to vibration; the rotating tube 28 allows the finned tube 7 to rotate flexibly within a certain range to adapt to the angle changes during the transmission process; the rubber block 29, the sealing block 30 and the gasket 31 work together to ensure the sealing of the pipeline connection to avoid leakage of the heat exchange medium affecting efficiency and safety.

[0040] Working Principle: Initial operation begins when the air delivery assembly is activated, and external air flows into the protective housing 1 through the air inlet 2, providing the airflow foundation for heat exchange. Simultaneously, heat exchange media, such as hot water or thermal oil, are fed through the feed pipe 11 of the delivery assembly and, after distribution through the connecting elbow 10, enter the finned tubes 7, completing the input preparation of the media and airflow and establishing the initial conditions for heat exchange. The rotating rod 5 serves as the power transmission core and can be manually driven via the rotating disk 16 or passively rotated by the airflow impacting the windward blades 13. As the rotating rod 5 rotates, the external transmission gear 6 rotates synchronously, meshing with the transmission gear 8 and driving some of the finned tubes 7 to rotate. Furthermore, due to the meshing relationships between the transmission gears 8, between the transmission gear 8 and the rotating gear 9, and between the rotating gears 9, all of the finned tubes 7 rotate in tandem. As the elliptical finned tubes 7 rotate, their contact area and angle with the airflow continuously change, enhancing heat exchange efficiency and achieving efficient heat exchange between the airflow and the media.

[0041] The airflow entering the protective shell 1 is first concentrated in the windward box 14, and then dispersed and evenly sprayed onto the surface of the fin tube 7 through the air outlet nozzle 15 at the bottom. This design concentrates the airflow and uses the airflow to impact the windward blades 13, ensuring the uniformity of the rotation and heat exchange of the fin tube 7, improving the overall heat exchange effect, and ensuring that the temperature of the airflow rises and falls according to the design requirements during the process of passing through the heat exchanger.

[0042] Initially, manually rotate the rotating disk 16, driving the fixed rod 17 to rotate. The limit box 18 on the fixed rod 17 rotates with it, driving the sliding rod 19 to slide back and forth within the air cylinder 21. The rubber sheet 20 moves synchronously to pump air, and the generated airflow is input into the water storage pipe 23 through the connecting pipe 22. The air pressure in the water storage pipe 23 rises, pushing the clean water out through the outlet pipe 24. The rubber head 27 in the water inlet pipe 25 is closed by the spring 26 to prevent backflow, and the water flow impacts the bottom end of the protective shell 1, further driving the rotation of the windward blade 13. The spring 26 resets and pushes the rubber head 27, opening the water inlet pipe 25, replenishing the water source in the water storage pipe 23 from the water tank. This reciprocating cycle drives the water flow, making the wind and water forces drive the windward blade 13 to rotate more stably, and partially exchanging heat within the heat exchanger.

[0043] In the conveying assembly, the connecting elbow 10, the feed pipe 11, and the discharge pipe 12 are reinforced by the limit pipe 32, and the rotating tube 28 can make the finned tube 7 rotate flexibly to adapt to the operation requirements; the rubber block 29, the sealing block 30, and the gasket 31 work together to ensure the sealing of the pipeline connection parts, prevent medium leakage, ensure the long-term stable operation of the heat exchanger, and avoid the impact of leakage on heat exchange efficiency and system safety.

[0044] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An elliptical fin-tube heat exchanger, comprising a protective shell (1), characterized in that: The outside of the protective shell (1) is fixedly connected to an air delivery component, the top of the inner wall of the protective shell (1) is fixedly connected to a fixed shell (4), the left end of the fixed shell (4) is rotatably connected to a rotating rod (5), the outer front end of the rotating rod (5) is fixedly connected to a transmission component, the inside of the fixed shell (4) is rotatably connected to a plurality of finned tubes (7), the outside of the protective shell (1) is fixedly connected to a material delivery component, the outside of the rotating rod (5) is fixedly connected to a plurality of windward blades (13), the inside of the protective shell (1) A windward box (14) is fixedly connected to the bottom end of the windward box (14) with a plurality of air outlet nozzles (15); the front end of the rotating rod (5) is fixedly connected to a rotating disk (16); the front end of the rotating disk (16) is fixedly connected to a fixed rod (17); the outside of the fixed rod (17) is slidably connected to an air pumping assembly; the left end of the air pumping assembly is fixedly connected to a water storage pipe (23); the rear end of the water storage pipe (23) is fixedly connected to a conveying assembly; and the bottom end of the protective shell (1) is fixedly connected to a water tank; The conveying assembly comprises a water outlet pipe (24), the rear end of the water storage pipe (23) is fixedly connected to the front end of the water outlet pipe (24), the rear end of the water storage pipe (23) is fixedly connected to a water inlet pipe (25), the interiors of the water inlet pipe (25) and the water outlet pipe (24) are both slidably connected to rubber heads (27), the exteriors of the rubber heads (27) are fixedly connected to springs (26), the other ends of the two springs (26) are respectively fixedly connected to the interiors of the water inlet pipe (25) and the water outlet pipe (24), the airflow entering the protective shell (1) first converges to the windward box (14), and then dispersed and evenly sprayed to the surface of the fin tube (7) through the air outlet nozzle (15) at the bottom end, such that the airflow is concentrated in this design, and the airflow is used to impact the windward blade (13), so that the air pressure in the water storage pipe (23) rises, pushing the clean water to be output through the water outlet pipe (24); the water flow at the bottom end of the interior of the protective shell (1) impacts the windward blade (13), so that the windward blade (13) is further driven to rotate.

2. The elliptical fin-tube heat exchanger according to claim 1, characterized in that: The air delivery assembly comprises an air inlet (2) and an air outlet (3), the right end of the air inlet (2) is fixedly connected to the left end of the protective shell (1), and the left end of the air outlet (3) is fixedly connected to the right end of the protective shell (1).

3. The elliptical fin-tube heat exchanger according to claim 1, characterized in that: The feeding assembly comprises a connecting elbow (10), a feed pipe (11) and a discharge pipe (12), wherein the exterior of the connecting elbow (10) is fixedly connected to the interior of the protective shell (1), the exterior of the feed pipe (11) is fixedly connected to the interior of the protective shell (1), and the exterior of the discharge pipe (12) is fixedly connected to the interior of the protective shell (1).

4. The elliptical fin-tube heat exchanger according to claim 1, characterized in that: The inflation assembly includes a limit box (18), the outside of the fixed rod (17) is slidably connected to the inside of the limit box (18), the bottom end of the limit box (18) is fixedly connected to a sliding rod (19), the bottom end of the sliding rod (19) is fixedly connected to a rubber sheet (20), the outside of the rubber sheet (20) is slidably connected to an air cylinder (21), and the left end of the air cylinder (21) is fixedly connected to a connecting pipe (22).

5. The elliptical fin-tube heat exchanger according to claim 3, characterized in that: The outside of the connecting elbow (10) is fixedly connected to a portion of the limiting tube (32), and the inside of the other portion of the limiting tube (32) is fixedly connected to the outside of the feed tube (11) and the discharge tube (12), respectively. The inside of the limiting tube (32) is rotatably connected to two rotating tubes (28), and the two rotating tubes (28) are rotatably connected. The inside of the rotating tube (28) is rotatably connected to two rubber blocks (29), the inside of the rotating tube (28) is fixedly connected to a sealing block (30), and the insides of the two rotating tubes (28) are slidably connected to a gasket (31).

6. The elliptical fin-tube heat exchanger according to claim 4, characterized in that: The outside of the sliding rod (19) is slidably connected to the inside of the air cylinder (21), and the left end of the connecting pipe (22) is fixedly connected to the right end of the water storage pipe (23).

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