A finned heat exchanger

Abstract

This invention relates to the field of heat exchange equipment technology and discloses a finned heat exchanger, including a housing. A mounting shell is fixedly installed at the top of the housing, and a motor is fixedly installed at the top of the mounting shell. Fan blades are fixedly sleeved onto the output end of the motor. Side plates are fixedly installed on both the left and right sides of the housing. Clamping plates are fixedly installed on both the front and rear sides inside the housing. Fins are placed inside the housing. This invention prevents the side plates from contacting the copper tube by creating clearance holes on the side plates that are much larger than the diameter of the copper tube. Clamping plates are used to hold the fins in place. The clamping plates and the housing fix the fins to both the front and rear sides, thus preventing pressure on the copper tube during fixing. Even if vibration occurs during transportation, the side plates will not wear through the copper tube, reducing the wear rate and after-sales service volume of the copper tube.

Description

Technical Field

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

[0002] Finned heat exchangers are highly efficient heat exchange devices widely used in industry, refrigeration, and HVAC. Their core component is the fins, which increase the heat exchange area, enabling more efficient heat transfer from a hot fluid to a cold fluid. In existing technology, a mounting plate is typically used to secure the heat exchanger to the casing. However, this method can lead to contact between the mounting plate and the copper tubes of the radiator. During transportation, vibrations may cause the mounting plate to abrade the copper tubes, increasing wear and tear and after-sales service costs. Summary of the Invention

[0003] To overcome the shortcomings of the prior art, the present invention provides a finned heat exchanger with the advantages of reducing copper tube wear rate and after-sales volume.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a finned heat exchanger, comprising a housing, an mounting shell fixedly installed at the top of the housing, a motor fixedly installed at the top of the mounting shell, a fan blade fixedly sleeved at the output end of the motor, side plates fixedly installed on both the left and right sides of the housing, clamping plates fixedly installed on both the front and rear sides inside the housing, fins placed inside the housing, copper tubes fixedly installed in the middle of the fins, multiple clearance holes opened at the bottom of the side plates, and a flat plate fixedly installed on the side of the side plate away from the center of the housing.

[0005] As a preferred embodiment of the present invention, a fixed box is provided in the middle of the housing, a movable plate is movably connected to the inner cavity of the fixed box, a rack is fixedly installed on the front side of the movable plate, an incomplete gear is rotatably connected to the top of the fixed box, and a one-way inlet pipe and a one-way outlet pipe are fixedly installed at the rear end of the fixed box.

[0006] As a preferred embodiment of the present invention, a driven box is fixedly installed at the top of the incomplete gear, a connecting shaft is fixedly connected to the bottom of the fan blade, a ratchet is fixedly installed at the bottom of the connecting shaft, a ratchet tooth is rotatably connected to the inner cavity of the driven box, and a leaf spring and a stop bar are fixedly installed in the inner cavity of the driven box.

[0007] As a preferred embodiment of the present invention, the ratchet is placed inside the driven box and in contact with the ratchet teeth, the ratchet teeth and the stop bar are respectively located on both sides of the ratchet teeth, and the leaf spring connects the ratchet teeth and the driven box.

[0008] As a preferred embodiment of the present invention, a nozzle is fixedly installed at the bottom end of the one-way outlet pipe, the nozzle is located above the fins, an air inlet is provided at the top end of the one-way inlet pipe, and the fixing box is fixedly installed on the one-way outlet pipe.

[0009] As a preferred embodiment of the present invention, a connecting box one is fixedly installed in the inner cavity of the one-way inlet pipe, a connecting box two is fixedly installed at the top of the inner cavity of the housing, a cylinder is fixedly installed on the top surface of the housing, a pressing rod is fixedly sleeved at the output end of the cylinder, a connecting rod is movably connected to the inner cavity of the connecting box one, a closing ring is fixedly installed at the rear end of the inner cavity of the one-way inlet pipe, and a baffle is fixedly installed at the top end of the connecting rod.

[0010] As a preferred embodiment of the present invention, the baffle is fitted to the inner wall of the one-way inlet pipe and located on the rear side of the air inlet, the second connecting box is connected to the first connecting box, and the front end of the connecting rod is fitted to the closing ring.

[0011] As a preferred embodiment of the present invention, a terminal block is fixedly installed at the front end of the cylinder, a heat-conducting copper sheet is sleeved in the middle of the copper tube, a copper box is fixedly sleeved at the top end of the heat-conducting copper sheet, a push plate is movably connected to the inner cavity of the copper box, and a connecting piece is fixedly installed at the front end of the push plate.

[0012] As a preferred embodiment of the present invention, the connecting piece is located on the front side of the terminal block, there is no contact between the connecting piece and the terminal block, and the top of the heat-conducting copper sheet is wrapped around the outside of the copper box.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0014] 1. This invention uses clearance holes on the side plate that are much larger than the diameter of the copper tube to prevent the side plate from contacting the copper tube. A clamping plate is used to hold the fins in place. The clamping plate and the housing fix the front and rear sides of the fins, thus preventing pressure on the copper tube during the fixing process. Even if vibration occurs during transportation, the side plate will not wear through the copper tube, reducing the wear rate and after-sales service of the copper tube. The reverse rotation of the fan blades drives the ratchet to rotate, which in turn drives the incomplete gear to rotate through the driven box. This draws outside air into the fixed box, then into the one-way outlet pipe and nozzle. The nozzle then sprays high-pressure gas onto the fins, thereby cleaning the dust accumulated on the fins.

[0015] 2. This invention transfers heat from the copper tube to the copper box via a heat-conducting copper sheet. When the copper tube reaches a high temperature and cannot dissipate heat in time, the temperature on the copper tube will be transferred to the copper box, causing the gas inside the copper box to expand due to heat, which drives the push plate to move backward. The push plate then drives the connecting plate to contact the terminal block, thereby activating the cylinder. This, in turn, drives the connecting rod to move backward, closing the air inlet and opening the sealing ring. At this time, when the fan blade reverses, it no longer draws air into the nozzle but water connected to the rear end of the one-way inlet pipe, which can then spray water mist onto the fins to assist in cooling the fins and copper tube. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the present invention;

[0017] Figure 2 This is a schematic diagram of the copper tube connection in the structure of the present invention;

[0018] Figure 3 For the present invention Figure 2 Enlarged view of point A in the middle;

[0019] Figure 4 This is a schematic diagram of the exploded connection of the side plate of the present invention;

[0020] Figure 5 This is a schematic diagram of the unidirectional outlet pipe connection of the present invention.

[0021] Figure 6 This is a cross-sectional view of the copper box structure of the present invention;

[0022] Figure 7 This is a cross-sectional view of the fixing box of the present invention;

[0023] Figure 8 For the present invention Figure 7 Enlarged view of point B in the middle;

[0024] Figure 9 This is a cross-sectional view of the unidirectional inlet pipe structure of the present invention;

[0025] Figure 10 This is an exploded view of the housing and flat plate of the present invention.

[0026] Figure 11 This is an exploded view of the housing, side plate, and clamping plate of the present invention.

[0027] Figure 12 This is a schematic diagram of the structure of the housing, side plate, and flat plate of the present invention.

[0028] In the diagram: 1. Housing; 2. Mounting housing; 3. Motor; 4. Fan blade; 5. Side plate; 6. Clamping plate; 7. Fin; 8. Clearance hole; 9. Copper pipe; 10. Fixing box; 11. Moving plate; 12. Rack; 13. Incomplete gear; 14. Driven box; 15. Connecting shaft; 16. Ratchet; 17. Ratchet tooth; 18. Leaf spring; 19. Stop bar; 20. One-way inlet pipe; 21. One-way outlet pipe; 22. Nozzle; 23. Connecting box one; 24. Connecting box two; 25. Cylinder; 26. Extrusion rod; 27. Connecting rod; 28. Sealing ring; 29. ​​Baffle plate; 30. Air inlet; 31. Connecting plate; 32. Terminal block; 33. Copper box; 34. Thermally conductive copper sheet; 35. Push plate; 36. Flat plate; 37. C-shaped slot. Detailed Implementation

[0029] 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.

[0030] like Figures 1 to 12 As shown, the present invention provides a finned heat exchanger, including a housing 1, a mounting shell 2 fixedly installed at the top of the housing 1, a motor 3 fixedly installed at the top of the mounting shell 2, a fan blade 4 fixedly sleeved at the output end of the motor 3, side plates 5 fixedly installed on both the left and right sides of the housing 1, clamping plates 6 fixedly installed on both the front and rear sides inside the housing 1, fins 7 placed inside the housing 1, a copper tube 9 fixedly installed in the middle of the fins 7, a plurality of clearance holes 8 opened at the bottom end of the side plates 5, and a flat plate 36 fixedly installed on the side of the side plates 5 away from the center of the housing 1.

[0031] Among them, the inner side of the housing 1 near the side plate 5 is provided with a C-shaped slot 37, and the two sides of the flat plate 36 are inserted into the C-shaped slot 37 and abut against the side plate 5.

[0032] Regarding the airflow direction of fan blade 4, it is not limited to a single upward airflow mode. Its airflow direction can be designed and assembled to be downward or to the side, depending on actual needs. At the same time, there is no limit to the number of motors 3. Motors and fan blade combinations can be added to appropriate positions in the housing 1 or mounting housing 2 according to actual usage requirements and scenarios.

[0033] By opening clearance holes 8 on the side plate 5 that are much larger than the diameter of the copper tube 9, the side plate 5 will not come into contact with the copper tube 9. The fins 7 are held in place by the clamping plate 6 and the housing 1. The front and rear sides of the fins 7 are fixed by the clamping plate 6 and the housing 1, so that the copper tube 9 will not be pressured during the fixing process. Even if vibration occurs during transportation, the side plate 5 will not wear through the copper tube 9, thus reducing the wear rate and after-sales volume of the copper tube 9.

[0034] In actual assembly, the size of copper tube 9 can be freely selected according to the actual working conditions, such as the flow rate and pressure requirements of the conveyed medium, the size of the installation space, and the cost budget.

[0035] Among them, the middle part of the housing 1 is provided with a fixed box 10, the inner cavity of the fixed box 10 is movably connected to a moving plate 11, the front side of the moving plate 11 is fixedly installed with a rack 12, the top of the fixed box 10 is rotatably connected with an incomplete gear 13, and the rear end of the fixed box 10 is fixedly installed with a one-way inlet pipe 20 and a one-way outlet pipe 21.

[0036] The reverse rotation of the fan blade 4 drives the ratchet 16 to rotate, which in turn drives the incomplete gear 13 to rotate through the driven box 14. This draws outside air into the fixed box 10, and then into the one-way outlet pipe 21 and the nozzle 22. The nozzle 22 then sprays high-pressure gas onto the fins 7, thereby cleaning the dust accumulated on the fins 7.

[0037] Among them, the top of the incomplete gear 13 is fixedly installed with a driven box 14, the bottom of the fan blade 4 is fixedly connected with a connecting shaft 15, the bottom of the connecting shaft 15 is fixedly installed with a ratchet 16, the inner cavity of the driven box 14 is rotatably connected with a ratchet 17, the inner cavity of the driven box 14 is fixedly installed with a leaf spring 18 and a stop bar 19, the ratchet 16 is placed inside the driven box 14 and contacts the ratchet 17, the ratchet 17 and the stop bar 19 are located on both sides of the ratchet 17, and the leaf spring 18 connects the ratchet 17 and the driven box 14.

[0038] When the fan blade 4 rotates in the forward direction, it drives the ratchet 16 to rotate. In this state, the inclined surface of the ratchet 16 contacts the ratchet tooth 17, pushing the ratchet tooth 17 towards the leaf spring 18. After the leaf spring 18 is compressed, it passes through and applies a force to the ratchet tooth 17 on the ratchet 16 through elasticity, so that the ratchet tooth 17 fits against the ratchet 16. The driven box 14 will not be driven to rotate. When it is necessary to clean the dust accumulated on the fin 7, the motor 3 drives the fan blade 4 to rotate in the reverse direction. At this time, the ratchet 16 rotates in the reverse direction. Since the ratchet tooth 17 is blocked by the stop bar 19, it cannot rotate in the direction of the stop bar 19. Therefore, when the ratchet 16 rotates in the reverse direction, it can drive the driven box 14 to rotate, so as to ensure that the incomplete gear 13 will not rotate during normal operation of the device.

[0039] Among them, a nozzle 22 is fixedly installed at the bottom of the one-way outlet pipe 21, the nozzle 22 is located above the fin 7, and an air inlet 30 is opened at the top of the one-way inlet pipe 20. The fixing box 10 is fixedly installed on the one-way outlet pipe 21.

[0040] The air inlet 30 serves as the air intake and is located on the rear side of the closed ring 28. Air is introduced through the air inlet 30 when dust needs to be cleaned. The rear end of the one-way inlet pipe 20 is connected to a water inlet pipe. This water inlet pipe can be a pressurized municipal water pipe or a non-pressurized water pipe. If it is a pressurized municipal water pipe, there is no need to reverse the fan blade 4; the pressure inside the water pipe will drive the water to flow within the one-way inlet pipe 20, the fixing box 10, and the one-way outlet pipe 21. (Refer to...) Figure 7 There is a certain gap between the moving plate 11 and the rear side of the fixed box 10. This gap is used to realize the flow of water. If it is a non-pressurized water pipe, the fan blade 4 needs to be reversed. The reversal of the fan blade 4 drives the moving plate 11 to move, pump water and deliver water.

[0041] Among them, a connecting box 23 is fixedly installed in the inner cavity of the one-way inlet pipe 20, a connecting box 24 is fixedly installed at the top of the inner cavity of the housing 1, a cylinder 25 is fixedly installed on the top surface of the housing 1, a pressing rod 26 is fixedly sleeved at the output end of the cylinder 25, a connecting rod 27 is movably connected in the inner cavity of the connecting box 23, a closing ring 28 is fixedly installed at the rear end of the inner cavity of the one-way inlet pipe 20, and a baffle 29 is fixedly installed at the top of the connecting rod 27.

[0042] The cylinder 25 drives the extrusion rod 26 to move down, thereby pressing the hydraulic oil in the second connecting box 24 into the first connecting box 23, causing the hydraulic oil to push the connecting rod 27 forward. After the connecting rod 27 moves forward, the rear end of the connecting rod 27 is no longer in contact with the closing ring 28, opening the closing ring 28 and driving the baffle 29 to move forward to close the air inlet 30, realizing automatic switching between water and air circuits with a high degree of automation.

[0043] Among them, the baffle 29 is attached to the inner wall of the one-way inlet pipe 20 and is located behind the air inlet 30; the second connecting box 24 is connected to the first connecting box 23; and the front end of the connecting rod 27 is attached to the closing ring 28.

[0044] To prevent water from flowing out through the closed ring 28 during air intake, and to prevent water from leaking through the air intake port 30 during auxiliary cooling.

[0045] Among them, the front end of the cylinder 25 is fixedly installed with a terminal 32, the middle part of the copper tube 9 is sleeved with a heat-conducting copper sheet 34, the top end of the heat-conducting copper sheet 34 is fixedly sleeved with a copper box 33, the inner cavity of the copper box 33 is movably connected with a push plate 35, and the front end of the push plate 35 is fixedly installed with a connecting piece 31.

[0046] The heat is transferred to the copper box 33 through the heat-conducting copper sheet 34 on the copper pipe 9. When the copper pipe 9 is too hot to dissipate heat in time, the temperature on the copper pipe 9 will be transferred to the copper box 33. The gas in the copper box 33 will expand due to heat and drive the push plate 35 to move backward. The push plate 35 will drive the connecting plate 31 to contact the terminal 32, thereby activating the cylinder 25. This achieves the effect of automatic auxiliary cooling according to the working status of the device.

[0047] Among them, the connecting piece 31 is located in front of the terminal 32, and there is no contact between the connecting piece 31 and the terminal 32. The top of the heat-conducting copper sheet 34 is wrapped around the outside of the copper box 33.

[0048] There is a gap between the connecting piece 31 and the terminal 32. The air inside the copper box 33 expands when heated, pushing the push piece 35 to move backward. The backward movement of the push piece 35 causes the connecting piece 31 to move, but the connecting piece 31 will not contact the terminal 32. This prevents the push piece 35 from accidentally opening the cylinder 25 when the temperature of the copper tube 9 is transferred to the copper box 33 under normal operating conditions, thus ensuring the accuracy of the device operation.

[0049] Working principle and usage process of this invention:

[0050] During use, the heat inside the copper tube 9 is transferred to the fins 7. The motor 3 drives the fan blade 4 to rotate, causing air to flow. As the air flows, it passes through the fins 7 and carries away the heat from the fins 7. During the entire assembly process, a clearance hole 8 is opened on the side plate 5. The diameter of the clearance hole 8 is much larger than the diameter of the copper tube 9. There is no contact between the side plate 5 and the copper tube 9. Furthermore, the clamping plate 6, the side plate 5, and the housing 1 together clamp the fins 7. The fixation of the fins 7 and the copper tube 9 only applies pressure to the fins 7 and not to the copper tube 9. Therefore, even if the device vibrates during operation, the side plate 5 will not cut the copper tube 9. When the fan blade 4 rotates, it drives the ratchet 16 to rotate. In this state, the inclined surface of the ratchet 16 contacts the ratchet tooth 17, pushing the ratchet tooth 17 towards the leaf spring 18. After the leaf spring 18 is compressed, it passes through and applies a force to the ratchet tooth 17 through elasticity, causing the ratchet tooth 17 to fit against the ratchet tooth 16. The driven box 14 will not be driven to rotate.

[0051] When it is necessary to clean the dust accumulated on the fins 7, the motor 3 drives the fan blades 4 to reverse. At this time, the ratchet 16 reverses. Since the ratchet 17 is blocked by the stop bar 19, it cannot rotate in the direction of the stop bar 19. Therefore, when the ratchet 16 reverses, it can drive the driven box 14 to rotate, which in turn drives the incomplete gear 13 to rotate. When the incomplete gear 13 rotates, it can drive the moving plate 11 to slide back and forth in the fixed box 10 through the intermittent meshing with the two racks 12. This allows air to be drawn into the one-way inlet pipe 20 through the air inlet 30, then into the fixed box 10 through the one-way inlet pipe 20, and finally into the one-way outlet pipe 21 through the fixed box 10. When the pressure in the one-way outlet pipe 21 reaches the opening pressure of the nozzle 22, the nozzle 22 sprays high-pressure gas above the fins 7, which blows off the dust on the fins 7. After the dust is blown off, the fan blades 4 resume forward rotation and continue to work.

[0052] When the device is working, the heat on the copper pipe 9 is transferred to the copper box 33 through the heat-conducting copper sheet 34, causing the air inside the copper box 33 to expand due to heat, pushing the pusher 35 backward. However, in this state, the backward movement of the pusher 35 causes the connecting piece 31 to move, but the connecting piece 31 will not contact the terminal 32. When the liquid temperature inside the copper pipe 9 is too high and cannot be dissipated in time, the copper pipe 9 will experience a high temperature condition. Under high temperature conditions, the fan blade 4 reverses, the temperature transferred from the heat-conducting copper sheet 34 to the copper box 33 increases, and the pusher 35 moves a greater distance. At this time, the movement of the pusher 35 and the connecting piece 31 will cause the connecting piece 31 to move. 1. Contact with terminal 32, thereby activating cylinder 25. Cylinder 25 drives extrusion rod 26 downward, thereby pressing hydraulic oil in connection box 24 into connection box 1 23, causing hydraulic oil to push connecting rod 27 forward. After connecting rod 27 moves forward, the rear end of connecting rod 27 is no longer in contact with sealing ring 28, opening sealing ring 28 and driving baffle 29 forward to close air inlet 30. At this time, water in water pipe connected to the rear end of one-way inlet pipe 20 enters one-way inlet pipe 20 and is sprayed onto fin 7 through one-way inlet pipe 20, fixed box 10, one-way outlet pipe 21 and nozzle 22, providing auxiliary cooling for fin 7 and copper pipe 9.

[0053] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0054] While 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 these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A finned heat exchanger, comprising a housing (1), characterized in that: A mounting shell (2) is fixedly installed at the top of the housing (1), and a motor (3) is fixedly installed at the top of the mounting shell (2). A fan blade (4) is fixedly sleeved at the output end of the motor (3). Side plates (5) are fixedly installed on both the left and right sides of the housing (1). A clamping plate (6) is fixedly installed on both the front and rear sides inside the housing (1). A fin (7) is placed inside the housing (1). A copper tube (9) is fixedly installed in the middle of the fin (7). Multiple clearance holes (8) are opened at the bottom of the side plate (5). A flat plate (36) is fixedly installed on the side of the side plate (5) away from the center of the housing (1). A fixing box (10) is provided in the middle of the housing (1). The inner cavity of the fixed box (10) is movably connected to a movable plate (11). Two racks (12) are fixedly installed on the front side of the movable plate (11). An incomplete gear (13) is rotatably connected to the top of the fixed box (10). A one-way inlet pipe (20) and a one-way outlet pipe (21) are fixedly installed at the rear end of the fixed box (10). A driven box (14) is fixedly installed at the top of the incomplete gear (13). A connecting shaft (15) is fixedly connected to the bottom end of the fan blade (4). A ratchet (16) is fixedly installed at the bottom end of the connecting shaft (15). A ratchet tooth (17) is rotatably connected to the inner cavity of the driven box (14). The inner cavity of the driven box (14) is fixed. A leaf spring (18) and a stop bar (19) are installed; the ratchet (16) is placed in the driven box (14) and contacts the ratchet tooth (17); the leaf spring (18) and the stop bar (19) are located on both sides of the ratchet tooth (17); the leaf spring (18) connects the ratchet tooth (17) and the driven box (14); a nozzle (22) is fixedly installed at the bottom end of the one-way outlet pipe (21); the nozzle (22) is located above the fin (7); an air inlet hole (30) is opened at the top end of the one-way inlet pipe (20); the fixed box (10) is fixedly installed on the one-way outlet pipe (21); when it is necessary to clean the dust accumulated on the fin (7), the motor (3) drives the fan. When leaf (4) reverses, ratchet (16) reverses. Since ratchet (17) is blocked by stop bar (19), it cannot rotate in the direction of stop bar (19). Therefore, when ratchet (16) reverses, it can drive driven box (14) to rotate, and then drive incomplete gear (13) to rotate. When incomplete gear (13) rotates, it can drive moving plate (11) to slide back and forth in fixed box (10) through intermittent meshing with two racks (12). It can realize that air is drawn into one-way inlet pipe (20) through air inlet hole (30), and then enters fixed box (10) through one-way inlet pipe (20), and finally enters one-way outlet pipe (21) through fixed box (10).

2. The finned heat exchanger according to claim 1, characterized in that: A connecting box one (23) is fixedly installed in the inner cavity of the one-way inlet pipe (20). A connecting box two (24) is fixedly installed at the top of the inner cavity of the housing (1). A cylinder (25) is fixedly installed on the top surface of the housing (1). A pressing rod (26) is fixedly sleeved at the output end of the cylinder (25). A connecting rod (27) is movably connected in the inner cavity of the connecting box one (23). A closing ring (28) is fixedly installed at the rear end of the inner cavity of the one-way inlet pipe (20). A baffle plate (29) is fixedly installed at the top end of the connecting rod (27).

3. A finned heat exchanger according to claim 2, characterized in that: The baffle (29) is attached to the inner wall of the one-way inlet pipe (20) and located on the rear side of the air inlet (30). The second connecting box (24) is connected to the first connecting box (23). The front end of the connecting rod (27) is attached to the closing ring (28).

4. A finned heat exchanger according to claim 3, characterized in that: A terminal block (32) is fixedly installed at the front end of the cylinder (25), a heat-conducting copper sheet (34) is sleeved in the middle of the copper tube (9), a copper box (33) is fixedly sleeved at the top end of the heat-conducting copper sheet (34), a push plate (35) is movably connected to the inner cavity of the copper box (33), and a connecting piece (31) is fixedly installed at the front end of the push plate (35).

5. A finned heat exchanger according to claim 4, characterized in that: The connecting piece (31) is located in front of the terminal (32), and there is no contact between the connecting piece (31) and the terminal (32). The top of the heat-conducting copper sheet (34) is wrapped around the outside of the copper box (33).

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