A high-efficiency and energy-saving overlapping heat exchanger

Abstract

This invention discloses a high-efficiency and energy-saving overlapping heat exchanger in the field of heat exchanger technology. It includes a base plate with two heat exchange tanks stacked on top of it. First support frames are symmetrically fixed to the left and right sides of the bottom of the lower heat exchange tank, and both first support frames are fixedly connected to the base plate. Second support frames are symmetrically fixed to the left and right sides of the bottom of the upper heat exchange tank, and the bottom ends of both second support frames are fixedly connected to the lower heat exchange tank. A cleaning mechanism is provided inside each heat exchange tank to remove scale buildup on the heat exchange tubes. A driving mechanism is located between the two heat exchange tanks to simultaneously drive the cleaning mechanisms in both tanks to operate continuously. This device can continuously clean the scale on the heat exchange tubes, ensuring a smooth and flat surface and effectively guaranteeing the heat transfer performance of the heat exchange tubes.

Description

Technical Field

[0001] This invention relates to the field of heat exchanger technology, specifically to a high-efficiency and energy-saving overlapping heat exchanger. Background Technology

[0002] A heat exchanger is a device that transfers some of the heat from a hot fluid to a cold fluid.

[0003] When water is used as the heat exchange medium, scale will accumulate on the inner wall of the heat exchanger and the surface of the heat exchange tubes when the water flows in the heat exchanger for a long time. The scale on the surface of the heat exchange tubes will affect the heat transfer effect of the heat exchange tubes, thus reducing the heat exchange efficiency of the entire heat exchanger. In addition, existing heat exchangers are all single-stage heat exchangers. The water used as the hot or cold medium will slowly return to room temperature after the heat exchange. Before the next heat exchange, the room temperature water needs to be heated or cooled to a suitable temperature, which is not energy-efficient. Summary of the Invention

[0004] The purpose of this invention is to provide a high-efficiency and energy-saving superimposed heat exchanger to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a high-efficiency and energy-saving overlapping heat exchanger, comprising a base plate, two heat exchange barrels disposed above the base plate, the two heat exchange barrels being stacked on top of the base plate; first support frames are symmetrically and fixedly connected to the left and right sides of the bottom of the lower heat exchange barrel, and both first support frames are fixedly connected to the base plate; second support frames are symmetrically and fixedly connected to the left and right sides of the bottom of the upper heat exchange barrel, and the bottom ends of both second support frames are fixedly connected to the lower heat exchange barrel; heat exchange tubes are disposed inside the heat exchange barrels, the left and right ends of which are rotatably connected to the left and right sides of the heat exchange barrels respectively, and the heat exchange tubes are spiral-shaped; a cleaning mechanism is disposed inside the heat exchange barrels, the cleaning mechanism being used to clean the scale accumulated on the heat exchange tubes; a driving mechanism is disposed between the two heat exchange barrels, the driving mechanism being used to simultaneously drive the cleaning mechanisms in both heat exchange barrels to operate continuously.

[0006] Preferably, the cleaning mechanism includes two sliding frames, which are symmetrically distributed on the front and rear sides of the heat exchange tank and are fixedly connected to the heat exchange tank. Sliding blocks are slidably connected within each sliding frame, and a fixing ring is provided between the two sliding blocks. The fixing ring is fixedly connected to the two sliding blocks and contains a brush. The brush is annular in shape and is fitted onto the heat exchange tube. The brush is rotatably connected to the fixing ring. A moving mechanism is provided on the sliding frame to drive a slider to slide on the sliding frame. A rotating mechanism is provided on the brush to drive the brush to rotate when the two sliders move the brush.

[0007] Preferably, the moving mechanism includes a threaded rod, which is located near the sliding frame and is rotatably connected to the heat exchange tank at both ends; the slider is threadedly connected to the threaded rod.

[0008] Preferably, the rotating mechanism includes a first bevel gear ring, which is fixedly connected to the brush; a connecting rod is fixedly connected to the rear of the fixed ring, and a first gear and a first bevel gear are rotatably connected to the connecting rod, the first gear and the first bevel gear are fixedly connected to each other and the first bevel gear meshes with the bevel gear ring; a rack is provided inside the heat exchange tank at the bottom of the first gear, the rack meshes with the first gear and is fixedly connected to the inner wall of the heat exchange tank.

[0009] Preferably, the driving mechanism includes four first synchronous pulleys, which are located at the left and right ends of the two heat exchange tubes and are fixedly connected to the heat exchange tubes; a synchronous belt is provided on the first synchronous pulleys and second synchronous pulleys are symmetrically arranged on the front and rear sides of the first synchronous pulleys, and the second synchronous pulleys are fixedly connected to the threaded rods; the synchronous belt meshes with the first synchronous pulleys and the two second synchronous pulleys simultaneously; a reciprocating mechanism is provided between the two heat exchange tanks, which is used to drive the heat exchange tubes to reciprocate within the heat exchange tanks.

[0010] Preferably, the reciprocating mechanism includes two rotating rods, which are symmetrically distributed on the left and right sides of the two heat exchange tanks; the rotating rods are rotatably connected to both heat exchange tanks, and second bevel gears are symmetrically fixedly connected to the upper and lower ends of the rotating rods; second bevel gear rings are symmetrically fixedly connected to the left and right sides of the heat exchange tubes, and the second bevel gears on the upper and lower sides respectively mesh with the second bevel gear rings on the upper and lower sides; a third bevel gear is fixedly connected to the middle position of the rotating rods; an alternating mechanism is provided between the two third bevel gears, which is used to drive the third bevel gears on the left and right sides to rotate alternately.

[0011] Preferably, the alternating mechanism includes a slide rail located between and fixedly connected to the two second support frames; a fixed frame is slidably connected to the bottom of the slide rail, and a motor is fixedly connected inside the fixed frame. The motor is a dual-axis motor, and a fourth bevel gear is fixedly connected to the output shafts on both sides of the motor; bushings are slidably connected to the two second support frames, and the two bushings are respectively sleeved on the two fourth bevel gears and rotatably connected to the fourth bevel gears; the fourth bevel gear on the right side meshes with the third bevel gear on the right side; a cylinder is fixedly connected to the second support frame on the right side, and the telescopic end of the cylinder is fixedly connected to the fixed frame.

[0012] Preferably, the third bevel gear on the left is located below the fourth bevel gear on the left, and the third bevel gear on the right is located above the fourth bevel gear on the right.

[0013] Preferably, a water inlet pipe is connected to the bottom of the lower heat exchange tank; a connecting pipe is provided between the two heat exchange tanks, and the connecting pipe is connected to the two heat exchange tanks; a drain pipe is connected to the top of the upper heat exchange tank; and a heater is fixedly connected to the connecting pipe.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] This invention designs the heat exchange tubes in a spiral shape, which increases the contact area between the heat exchange tubes and the cold water. This also increases the residence time of the heat medium inside the heat exchange tubes within the heat exchange tank. As a result, the cold water inside the heat exchange tank can fully absorb the heat from the heat medium inside the heat exchange tubes, cooling down the heat medium inside the heat exchange tubes and thus improving the overall heat exchange effect of the heat exchange tank.

[0016] This invention activates a drive mechanism, which simultaneously drives the cleaning mechanisms inside the two heat exchange tanks. As the cleaning mechanisms operate, they continuously clean the scale on the heat exchange tubes, ensuring a smooth and flat surface and effectively guaranteeing the heat transfer performance of the heat exchange tubes. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0018] Figure 2 This is a schematic diagram of the rear view structure of the present invention;

[0019] Figure 3 This is a schematic diagram of the disassembled structure of the present invention;

[0020] Figure 4 This is a schematic diagram of the heat exchange tank in this invention;

[0021] Figure 5 This is a cross-sectional view of the heat exchange tank in this invention.

[0022] Figure 6 This is a schematic diagram of the heat exchange tube structure in this invention;

[0023] Figure 7 for Figure 6 A magnified structural diagram of A in the middle;

[0024] Figure 8 This is a schematic diagram of the drive mechanism in this invention.

[0025] The attached diagram lists the components represented by each number as follows:

[0026] 1. Base plate; 2. Heat exchange tank; 3. First support frame; 4. Second support frame; 5. Heat exchange tube; 6. Sliding frame; 7. Sliding block; 8. Fixing ring; 9. Brush; 10. Threaded rod; 11. First bevel gear ring; 12. Connecting rod; 13. First gear; 14. First bevel gear; 15. Rack; 16. First synchronous pulley; 17. Synchronous belt; 18. Second synchronous pulley; 19. Rotating rod; 20. Second bevel gear; 21. Second bevel gear ring; 22. Third bevel gear; 23. Slide rail; 24. Fixing frame; 25. Motor; 26. Fourth bevel gear; 27. Bushing; 28. Water inlet pipe; 29. ​​Connecting pipe; 30. Drain pipe; 31. Heater; 32. Cylinder. Detailed Implementation

[0027] Please see Figures 1-8 This invention provides a technical solution: a high-efficiency and energy-saving overlapping heat exchanger, including a base plate 1, two heat exchange tanks 2 are arranged on the top of the base plate 1, and the two heat exchange tanks 2 are stacked on the base plate 1; first support frames 3 are symmetrically fixedly connected to the left and right sides of the bottom of the lower heat exchange tank 2, and both first support frames 3 are fixedly connected to the base plate 1; second support frames 4 are symmetrically fixedly connected to the left and right sides of the bottom of the upper heat exchange tank 2, and the bottom ends of both second support frames 4 are fixedly connected to the lower heat exchange tank 2; heat exchange tubes 5 are provided inside the heat exchange tanks 2, and the left and right ends of the heat exchange tubes 5 are rotatably connected to the left and right sides of the heat exchange tank 2 respectively, and the heat exchange tubes 5 are spiral-shaped; a cleaning mechanism is provided inside the heat exchange tanks 2 to clean the scale accumulated on the heat exchange tubes 5; a driving mechanism is provided between the two heat exchange tanks 2 to simultaneously drive the cleaning mechanisms in both heat exchange tanks 2 to operate continuously;

[0028] During operation, the lower heat exchange tank 2 serves as the primary heat exchanger, and the upper heat exchange tank 2 serves as the secondary heat exchanger. Cold water is introduced into the lower heat exchange tank 2, while the heat medium is introduced into the lower heat exchange tube 5. Due to the spiral shape of the heat exchange tube 5, the contact surface between the heat exchange tube 5 and the cold water is large, and the heat medium in the heat exchange tube 5 also stays in the heat exchange tank 2 for a longer time. Therefore, the cold water in the heat exchange tank 2 can fully absorb the heat of the heat medium in the heat exchange tube 5, cooling the heat medium down. After the cold water has absorbed the heat and become hot, the hot water is introduced into the upper heat exchange tank 2, while the cold medium is introduced into the upper heat exchange tank 2. The hot water in the upper heat exchange tube 5 slowly heats the cold medium inside the upper heat exchange tank 2 under the action of the hot water. As the water continuously passes through the two heat exchange tanks 2, scale will gradually accumulate on the surface of the heat exchange tube 5 inside the heat exchange tanks 2. The scale will affect the heat transfer effect of the heat exchange tube 5. At this time, the drive mechanism is activated, which drives the cleaning mechanism in the two heat exchange tanks 2 to run simultaneously. When the cleaning mechanism runs, it will continuously clean the scale on the heat exchange tube 5, thereby ensuring that the surface of the heat exchange tube 5 is smooth and flat, effectively ensuring the heat transfer effect of the heat exchange tube 5.

[0029] like Figure 5 As shown, as a further embodiment of the present invention, the cleaning mechanism includes two sliding frames 6, which are symmetrically distributed on the front and rear sides of the heat exchange tank 2 and are fixedly connected to the heat exchange tank 2. Sliding blocks 7 are slidably connected within the sliding frames 6, and a fixing ring 8 is provided between the two sliding blocks 7. The fixing ring 8 is fixedly connected to the two sliding blocks 7 and contains a brush 9, which is annular in shape and sleeved on the heat exchange tube 5. The brush 9 is rotatably connected to the fixing ring 8. A moving mechanism is provided on the sliding frame 6 to drive the slider to slide on the sliding frame 6. A rotating mechanism is provided on the brush 9 to drive the brush 9 to rotate when the two sliders move the brush 9.

[0030] The moving mechanism includes a threaded rod 10, which is located near the sliding frame 6 and is rotatably connected to the heat exchange tank 2 at both ends; the slider is threadedly connected to the threaded rod 10.

[0031] During operation, when the two threaded rods 10 inside the heat exchange tank 2 are driven to rotate, the threaded rods 10 will drive the two sliding blocks 7 to slide in the two sliding frames 6 respectively. When the two sliding blocks 7 slide, they will drive the fixed ring 8 to move. The fixed ring 8 will drive the brush 9 to move. When the brush 9 moves, it will clean the scale generated on the heat exchange tube 5.

[0032] like Figures 5-7 As shown, as a further embodiment of the present invention, the rotating mechanism includes a first bevel gear ring 11, which is fixedly connected to the brush 9; a connecting rod 12 is fixedly connected to the rear of the fixed ring 8, and a first gear 13 and a first bevel gear 14 are rotatably connected to the connecting rod 12, which are fixedly connected to each other and mesh with the bevel gear ring; a rack 15 is provided inside the heat exchange tank 2 at the bottom of the first gear 13, which meshes with the first gear 13 and is fixedly connected to the inner wall of the heat exchange tank 2;

[0033] During operation, as the fixed ring 8 moves, it drives the first gear 13 to move via the connecting rod 12. When the first gear 13 moves, it starts to rotate under the action of the rack 15. When the first gear 13 rotates, it drives the first bevel gear 14 to rotate. The first bevel gear 14 drives the first bevel ring 11, which meshes with it, to rotate. The first bevel ring 11 drives the brush 9 to rotate relative to the fixed ring 8. When the brush 9 rotates, it can further improve the cleaning effect on the scale on the heat exchange tube 5.

[0034] like Figure 4As shown, as a further embodiment of the present invention, the driving mechanism includes four first synchronous pulleys 16, which are respectively located at the left and right ends of the two heat exchange tubes 5 and are fixedly connected to the heat exchange tubes 5; a synchronous belt 17 is provided on the first synchronous pulleys 16, and second synchronous pulleys 18 are symmetrically provided on the front and rear sides of the first synchronous pulleys 16, and the second synchronous pulleys 18 are fixedly connected to the threaded rod 10; the synchronous belt 17 meshes with both the first synchronous pulleys 16 and the two second synchronous pulleys 18; a reciprocating mechanism is provided between the two heat exchange tanks 2, which is used to drive the heat exchange tubes 5 to reciprocate within the heat exchange tanks 2;

[0035] During operation, when the brush 9 moves within the heat exchange tank 2, to ensure that the heat exchange tube 5 does not obstruct the brush 9, the first synchronous wheel 16 on the left or right side of the heat exchange tank 2 is driven to rotate. The first synchronous wheel 16 then drives the heat exchange tube 5 to rotate. Since the heat exchange tube 5 is spiral-shaped, the brush 9 can move normally within the heat exchange tank 2 as the heat exchange tube 5 rotates. Simultaneously with the rotation of the first synchronous wheel 16, the first synchronous wheel 16 drives the second synchronous wheels 18 on both sides to rotate via the synchronous belt 17. The second synchronous wheels 18 drive the threaded rod 10 connected to them to rotate. When the threaded rod 10 rotates, it drives the sliding block 7 meshing with it to move. When the sliding blocks 7 on both sides move, they drive the brush 9 to move. Through the action of the first synchronous wheel 16, the synchronous belt 17, and the second synchronous wheel 18, the brush 9 can start to move as the heat exchange tube 5 rotates.

[0036] like Figure 4 , Figure 8 As shown, as a further embodiment of the present invention, the reciprocating mechanism includes two rotating rods 19, which are symmetrically distributed on the left and right sides of the two heat exchange tanks 2. The rotating rods 19 are rotatably connected to the two heat exchange tanks 2, and second bevel gears 20 are symmetrically fixedly connected to the upper and lower ends of the rotating rods 19. Second bevel gear rings 21 are symmetrically fixedly connected to the left and right sides of the heat exchange tube 5, and the upper and lower second bevel gears 20 mesh with the upper and lower second bevel gear rings 21 respectively. A third bevel gear 22 is fixedly connected to the middle position of the rotating rods 19. An alternating mechanism is provided between the two third bevel gears 22, which is used to drive the third bevel gears 22 on the left and right sides to rotate alternately.

[0037] The alternating mechanism includes a slide rail 23, which is located between and fixedly connected to the two second support frames 4; a fixed frame 24 is slidably connected to the bottom of the slide rail 23, and a motor 25 is fixedly connected inside the fixed frame 24. The motor 25 is a dual-axis motor, and a fourth bevel gear 26 is fixedly connected to the output shafts on both sides of the motor 25; a bushing 27 is slidably connected to each of the two second support frames 4, and the two bushings 27 are respectively fitted onto the two fourth bevel gears 26 and rotatably connected to the fourth bevel gears 26; the fourth bevel gear 26 on the right side meshes with the third bevel gear 22 on the right side; a cylinder 32 is fixedly connected to the second support frame 4 on the right side, and the telescopic end of the cylinder 32 is fixedly connected to the fixed frame 24.

[0038] The third bevel gear 22 on the left is located below the fourth bevel gear 26 on the left, and the third bevel gear 22 on the right is located above the fourth bevel gear 26 on the right.

[0039] During operation, when the fourth bevel gear 26 and the third bevel gear 22 on the right rotate, the motor 25 is started. The motor 25 drives the third bevel gear 22 on the right to rotate via the fourth bevel gear 26. The third bevel gear 22 drives the rotating rod 19 connected to it to rotate. The rotating rod 19 then drives the two second bevel gears 20 connected to it to rotate. The upper and lower second bevel gears 20 drive the upper and lower second bevel gear rings 21 to rotate respectively. The second bevel gear rings 21 drive the heat exchange tube 5 connected to them to rotate. At this time, the heat exchange tube 5 drives the corresponding brush 9 to move via the first synchronous pulley 16, the synchronous belt 17, and the second synchronous pulley 18. When the brush 9 moves from one end of the heat exchange tube 5 to the other end, the brush 9 has completed one cleaning of the heat exchange tube 5. Then, the cylinder 32 is started. The cylinder 32 drives the fixed frame 24 to move to the left on the slide rail 23. The fixed frame 24 drives the motor 25 to rotate. 5 and both fourth bevel gears 26 move to the left, and the fourth bevel gear 26 on the right disengages from the third bevel gear 22 on the right. When the fourth bevel gear 26 on the left engages with the third bevel gear 22 on the left, cylinder 32 stops. Since the third bevel gear 22 on the left is located at the bottom of the fourth bevel gear 26 on the left, when the fourth bevel gear 26 engages with the third bevel gear 22, it will drive the third bevel gear 22 on the left to rotate in the same direction as the third bevel gear 22 on the right. The third bevel gear 22 on the left drives the two second bevel gears 20 on the left to rotate through the rotating rod 19 on the left. The second bevel gears 20 on the left, through the second bevel gear ring 21 on the left, will drive the heat exchange tube 5 to start rotating in the opposite direction. The heat exchange tube 5, through the first synchronous pulley 16, the synchronous belt 17 and the second synchronous pulley 18, will drive the brush 9 to move to the other end of the heat exchange tube 5, so that the brush 9 can clean the heat exchange tube 5 back and forth.

[0040] like Figure 2As shown, as a further embodiment of the present invention, a water inlet pipe 28 is connected to the bottom of the lower heat exchange tank 2; a connecting pipe 29 is provided between the two heat exchange tanks 2, and the connecting pipe 29 is connected to the two heat exchange tanks 2; a drain pipe 30 is connected to the upper part of the upper heat exchange tank 2; and a heater 31 is fixedly connected to the connecting pipe 29.

[0041] During operation, cold water can be injected into the lower heat exchange tank 2 through the water inlet pipe 28. After the water in the lower heat exchange tank 2 is heated, the heated water is injected into the upper heat exchange tank 2 through the connecting pipe 29. The water in the upper heat exchange tank 2 after heat exchange can be discharged through the drain pipe 30. When the heated water in the lower heat exchange tank 2 enters the upper heat exchange tank 2 through the connecting pipe 29, the heater 31 can be activated to further heat the water, thereby improving the heat exchange effect of the upper heat exchange tank 2.

Claims

1. A high-efficiency and energy-saving overlapping heat exchanger, comprising a base plate (1), characterized in that: Two heat exchange barrels (2) are provided above the base plate (1), and the two heat exchange barrels (2) are stacked on the base plate (1); the bottom left and right sides of the lower heat exchange barrel (2) are symmetrically fixedly connected to the first support frame (3), and the two first support frames (3) are fixedly connected to the base plate (1); the bottom left and right sides of the upper heat exchange barrel (2) are symmetrically fixedly connected to the second support frame (4), and the bottom ends of the two second support frames (4) are fixedly connected to the lower heat exchange barrel (2); the heat exchange barrel (2) is provided with a heat exchange tube (5), and the left and right ends of the heat exchange tube (5) are rotatably connected to the left and right sides of the heat exchange barrel (2) respectively. The heat exchange tube (5) is spiral in shape; the heat exchange barrel (2) is provided with a cleaning mechanism, which is used to clean the scale accumulated on the heat exchange tube (5); a driving mechanism is provided between the two heat exchange barrels (2), which is used to drive the cleaning mechanism in the two heat exchange barrels (2) to run continuously at the same time; The cleaning mechanism includes two sliding frames (6), which are symmetrically distributed on the front and rear sides of the heat exchange tank (2) and are fixedly connected to the heat exchange tank (2). A sliding block (7) is slidably connected inside the sliding frame (6), and a fixing ring (8) is provided between the two sliding blocks (7). The fixing ring (8) is fixedly connected to the two sliding blocks (7) and a brush (9) is provided inside the fixing ring (8). The brush (9) is annular and is sleeved on the heat exchange tube (5). The brush (9) is rotatably connected to the fixing ring (8). A moving mechanism is provided on the sliding frame (6) to drive the slider to slide on the sliding frame (6). The brush (9) is provided with a rotating mechanism, which is used to drive the brush (9) to rotate when the two sliders move the brush (9); The rotating mechanism includes a first bevel ring (11), which is fixedly connected to the brush (9); a connecting rod (12) is fixedly connected to the rear of the fixed ring (8), and a first gear (13) and a first bevel gear (14) are rotatably connected to the connecting rod (12). The first gear (13) and the first bevel gear (14) are fixedly connected to each other and the first bevel gear (14) meshes with the bevel ring; a rack (15) is provided inside the heat exchange tank (2) at the bottom of the first gear (13), and the rack (15) meshes with the first gear (13) and is fixedly connected to the inner wall of the heat exchange tank (2).

2. The high-efficiency energy-saving overlapping heat exchanger according to claim 1, characterized in that: The moving mechanism includes a threaded rod (10), which is located near the sliding frame (6) and both ends of the threaded rod (10) are rotatably connected to the heat exchange tank (2); the slider is threadedly connected to the threaded rod (10).

3. The high-efficiency energy-saving overlapping heat exchanger according to claim 2, characterized in that: The driving mechanism includes four first synchronous pulleys (16), which are located at the left and right ends of the two heat exchange tubes (5) and are fixedly connected to the heat exchange tubes (5); a synchronous belt (17) is provided on the first synchronous pulley (16) and second synchronous pulleys (18) are symmetrically provided on the front and rear sides of the first synchronous pulley (16), and the second synchronous pulleys (18) are fixedly connected to the threaded rod (10); the synchronous belt (17) meshes with the first synchronous pulley (16) and the two second synchronous pulleys (18) at the same time; a reciprocating mechanism is provided between the two heat exchange tanks (2), which is used to drive the heat exchange tubes (5) to reciprocate within the heat exchange tanks (2).

4. The high-efficiency energy-saving overlapping heat exchanger according to claim 3, characterized in that: The reciprocating mechanism includes two rotating rods (19), which are symmetrically distributed on the left and right sides of the two heat exchange tanks (2). The rotating rods (19) are rotatably connected to the two heat exchange tanks (2) and the upper and lower ends of the rotating rods (19) are symmetrically fixedly connected with second bevel gears (20). The heat exchange tube (5) is symmetrically fixedly connected with second bevel gear rings (21) on the left and right sides, and the upper and lower bevel gears (20) mesh with the upper and lower bevel gear rings (21) respectively. The rotating rods (19) are fixedly connected with a third bevel gear (22) in the middle. An alternating mechanism is provided between the two third bevel gears (22), which is used to drive the third bevel gears (22) on the left and right sides to rotate alternately.

5. The high-efficiency energy-saving overlapping heat exchanger according to claim 4, characterized in that: The alternation mechanism includes a slide rail (23), which is located between two second support frames (4) and is fixedly connected to the two second support frames (4); a fixed frame (24) is slidably connected to the bottom of the slide rail (23), and a motor (25) is fixedly connected inside the fixed frame (24). The motor (25) is a dual-axis motor (25), and a fourth bevel gear (26) is fixedly connected to the output shafts on both the left and right sides of the motor (25); a bushing (27) is slidably connected to each of the two second support frames (4), and the two bushings (27) are respectively sleeved on the two fourth bevel gears (26) and rotatably connected to the fourth bevel gears (26); the fourth bevel gear (26) on the right side meshes with the third bevel gear (22) on the right side; a cylinder (32) is fixedly connected to the second support frame (4) on the right side, and the telescopic end of the cylinder (32) is fixedly connected to the fixed frame (24).

6. The high-efficiency energy-saving overlapping heat exchanger according to claim 5, characterized in that: The third bevel gear (22) on the left is located below the fourth bevel gear (26) on the left, and the third bevel gear (22) on the right is located above the fourth bevel gear (26) on the right.

7. The high-efficiency energy-saving overlapping heat exchanger according to claim 1, characterized in that: A water inlet pipe (28) is connected to the bottom of the lower heat exchange tank (2); a connecting pipe (29) is provided between the two heat exchange tanks (2), and the connecting pipe (29) is connected to the two heat exchange tanks (2); a drain pipe (30) is connected to the upper part of the upper heat exchange tank (2); a heater (31) is fixedly connected to the connecting pipe (29).

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