Efficient energy-saving overlapped heat exchanger

Abstract

The invention discloses an efficient energy-saving overlapped heat exchanger in the technical field of heat exchangers, which comprises a bottom plate, two heat exchange barrels are arranged above the bottom plate, and the two heat exchange barrels are stacked above the bottom plate; first supporting frames are symmetrically and fixedly connected to the left side and the right side of the bottom of the lower side heat exchange barrel, and the two first supporting frames are fixedly connected with the bottom plate. Second supporting frames are symmetrically and fixedly connected to the left side and the right side of the bottom of the upper side heat exchange barrel, and the bottom ends of the two second supporting frames are fixedly connected with the lower side heat exchange barrel. A cleaning mechanism is arranged in the heat exchange barrel and used for cleaning up scale accumulated on the heat exchange pipe. A driving mechanism is arranged between the two heat exchange barrels and used for driving the cleaning mechanisms in the two heat exchange barrels to continuously operate at the same time. The device can be used for continuously cleaning scale on the heat exchange tube, so that the surface of the heat exchange tube can be ensured to be flat and smooth, and the heat transfer effect of the heat exchange tube is effectively ensured.

Description

Technical Field

[0001] The invention relates to the technical field of heat exchangers, in particular to a high-efficiency and energy-saving overlapping heat exchanger. Background Art

[0002] It is a device that transfers part of the heat of hot fluid to cold fluid, also known as a heat exchanger.

[0003] When water is used as a heat exchange medium, when water circulates in the heat exchanger for a long time, scale will accumulate on the inner wall of the heat exchanger and the surface of the heat exchange tube. The scale attached to the surface of the heat exchange tube will affect the heat transfer effect of the heat exchange tube, thereby reducing the heat exchange effect of the entire heat exchanger. In addition, the existing heat exchangers are all one-time heat exchangers. The water used as a hot medium or a cold medium will slowly become room temperature after heat exchange. During 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 object of the present invention is to provide a high-efficiency and energy-saving overlapping heat exchanger to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an efficient and energy-saving overlapping heat exchanger, comprising a bottom plate, two heat exchange barrels are arranged above the bottom plate, and the two heat exchange barrels are stacked above the bottom plate; first support frames are symmetrically fixedly connected to the left and right sides of the bottom of the lower heat exchange barrel, and the two first support frames are fixedly connected to the bottom plate; second support frames are symmetrically fixedly connected to the left and right sides of the bottom of the upper heat exchange barrel, and the bottom ends of the two second support frames are fixedly connected to the lower heat exchange barrel; a heat exchange tube is arranged in the heat exchange barrel, and the left and right ends of the heat exchange tube are respectively rotatably connected to the left and right sides of the heat exchange barrel, and the heat exchange tube is spiral-shaped; a cleaning mechanism is arranged in the heat exchange barrel, and the cleaning mechanism is used to clean the scale accumulated on the heat exchange tube; a driving mechanism is arranged between the two heat exchange barrels, and the driving mechanism is used to simultaneously drive the cleaning mechanisms in the two heat exchange barrels to continuously operate.

[0006] Preferably, the cleaning mechanism includes two sliding frames, the two sliding frames are symmetrically distributed at the front and rear sides of the heat exchange barrel and the two sliding frames are fixedly connected to the heat exchange barrel; a sliding block is slidably connected inside the sliding frame, a fixing ring is provided between the two sliding blocks, the fixing ring is fixedly connected to the two sliding blocks and a brush is provided inside the fixing ring, the brush is annular in shape and the brush sleeve is arranged on the heat exchange tube; the brush is rotatably connected to the fixing ring; a moving mechanism is provided on the sliding frame, and the moving mechanism is used to drive the slider to slide on the sliding frame; a rotating mechanism is provided on the brush, and the rotating mechanism is used to drive the brush to rotate when the two sliders drive the brush to move.

[0007] Preferably, the moving mechanism comprises a threaded rod, the threaded rod is located close to the sliding frame and both left and right ends of the threaded rod are rotatably connected to the heat exchange barrel; the sliding block 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 position 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 is meshed with the bevel gear ring; a rack is provided at the bottom position of the first gear in the heat exchange barrel, the rack is meshed with the first gear and the rack is fixedly connected to the inner wall of the heat exchange barrel.

[0009] Preferably, the driving mechanism includes four first synchronous wheels, which are respectively located at the left and right ends of the two heat exchange tubes and fixedly connected to the heat exchange tubes; a synchronous belt is provided on the first synchronous wheel, and second synchronous wheels are symmetrically provided at the front and rear sides of the first synchronous wheel, and the second synchronous wheels are fixedly connected to the threaded rod; the synchronous belt is meshed with the first synchronous wheel and the two second synchronous wheels at the same time; a reciprocating mechanism is provided between the two heat exchange barrels, and the reciprocating mechanism is used to drive the heat exchange tube to reciprocate in the heat exchange barrel.

[0010] Preferably, the reciprocating mechanism includes two rotating rods, and the two rotating rods are symmetrically distributed on the left and right sides of the two heat exchange barrels; the rotating rod is rotationally connected to the two heat exchange barrels at the same time, and the second bevel gears are symmetrically fixedly connected at the upper and lower ends of the rotating rod; the second bevel gear rings are symmetrically fixedly connected at the left and right sides of the heat exchange tube, and the second bevel gears on the upper and lower sides are respectively meshed with the second bevel gear rings on the upper and lower sides; the third bevel gear is fixedly connected to the middle position of the rotating rod; an alternating mechanism is provided between the two third bevel gears, and the alternating mechanism 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, which is located between the two second support frames and fixedly connected to the two second support frames; a fixed frame is slidably connected to the bottom position of the slide rail, and a motor is fixedly connected inside the fixed frame, and the motor is a dual-axis motor and the output shafts on the left and right sides of the motor are fixedly connected to the fourth bevel gear; shaft sleeves are slidably connected to the two second support frames, and the two shaft sleeves 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 is meshed 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 side is located below the fourth bevel gear on the left side, and the third bevel gear on the right side is located above the fourth bevel gear on the right side.

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

[0014] Compared with the prior art, the present invention has the following beneficial effects: The present invention designs the heat exchange tube to be in a spiral shape, so that the contact area between the heat exchange tube and the cold water is large, and the heat medium in the heat exchange tube stays in the heat exchange barrel for a longer time. Therefore, the cold water in the heat exchange barrel can fully absorb the heat of the heat medium in the heat exchange tube, cool down the heat medium in the heat exchange tube, and thus improve the overall heat exchange effect of the heat exchange barrel.

[0015] The present invention starts the driving mechanism, which drives the cleaning mechanisms in the two heat exchange barrels to run simultaneously. When the cleaning mechanisms are running, the scale on the heat exchange tubes will be continuously cleaned, thereby ensuring the flatness and smoothness of the surface of the heat exchange tubes, and effectively ensuring the heat transfer effect of the heat exchange tubes. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a rear view structural schematic diagram of the present invention; Figure 3 It is a schematic diagram of the split structure of the present invention; Figure 4 It is a schematic diagram of the structure of the heat exchange barrel in the present invention; Figure 5 It is a schematic cross-sectional structure diagram of the heat exchange barrel in the present invention; Figure 6 It is a schematic diagram of the structure of the heat exchange tube in the present invention; Figure 7 for Figure 6 A is a schematic diagram of the enlarged structure of the middle part; Figure 8 It is a structural schematic diagram of the driving mechanism in the present invention.

[0017] In the accompanying drawings, the components represented by the reference numerals are listed as follows: 1. Bottom plate; 2. Heat exchange barrel; 3. First support frame; 4. Second support frame; 5. Heat exchange tube; 6. Sliding frame; 7. Sliding block; 8. Fixed 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 wheel; 17. Synchronous belt; 18. Second synchronous wheel; 19. Rotating rod; 20. Second bevel gear; 21. Second bevel gear ring; 22. Third bevel gear; 23. Slide rail; 24. Fixed frame; 25. Motor; 26. Fourth bevel gear; 27. Bushing; 28. Water inlet pipe; 29. ​​Connecting pipe; 30. Drain pipe; 31. Heater; 32. Cylinder. DETAILED DESCRIPTION

[0018] See also Figure 1-Figure 8 The present invention provides a technical solution: an efficient and energy-saving overlapping heat exchanger, comprising a bottom plate 1, two heat exchange barrels 2 are arranged above the bottom plate 1, and the two heat exchange barrels 2 are stacked above the bottom plate 1; first support frames 3 are symmetrically fixedly connected to the left and right sides of the bottom of the lower heat exchange barrel 2, and the two first support frames 3 are fixedly connected to the bottom plate 1; second support frames 4 are symmetrically fixedly connected to the left and right sides of the bottom of the upper heat exchange barrel 2, and the bottom ends of the two second support frames 4 are fixedly connected to the lower heat exchange barrel 2; a heat exchange tube 5 is arranged in the heat exchange barrel 2, and the left and right ends of the heat exchange tube 5 are respectively rotatably connected to the left and right sides of the heat exchange barrel 2, and the heat exchange tube 5 is spiral-shaped; a cleaning mechanism is arranged in the heat exchange barrel 2, and the cleaning mechanism is used to clean the scale accumulated on the heat exchange tube 5; a driving mechanism is arranged between the two heat exchange barrels 2, and the driving mechanism is used to simultaneously drive the cleaning mechanisms in the two heat exchange barrels 2 to continuously operate; During operation, the lower heat exchange barrel 2 is a primary heat exchanger, and the upper heat exchange barrel 2 is a secondary heat exchanger. Cold water is passed into the lower heat exchange barrel 2, and the heat medium is passed into the lower heat exchange tube 5. Since the heat exchange tube 5 is in a spiral shape, 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 stays in the heat exchange barrel 2 for a longer time. Therefore, the cold water in the heat exchange barrel 2 can fully absorb the heat of the heat medium in the heat exchange tube 5 and cool down the heat medium in the heat exchange tube 5. When the cold water that has absorbed the heat becomes hot, hot water is passed into the upper heat exchange barrel 2, and the cold medium is passed into the lower heat exchange tube 5. The cold medium in the upper heat exchange tube 5 will be slowly heated by the hot water in the upper heat exchange barrel 2. As the water continuously passes through the two heat exchange barrels 2, scale will gradually accumulate on the surface of the heat exchange tube 5 in the heat exchange barrel 2, which will affect the heat transfer effect of the heat exchange tube 5. At this time, the driving mechanism is started, and the driving mechanism drives the cleaning mechanisms in the two heat exchange barrels 2 to run at the same time. When the cleaning mechanism is running, the scale on the heat exchange tube 5 will be continuously cleaned, thereby ensuring the flatness and smoothness of the surface of the heat exchange tube 5, and effectively ensuring the heat transfer effect of the heat exchange tube 5.

[0019] like Figure 5 As shown, as a further solution of the present invention, the cleaning mechanism includes two sliding frames 6, the two sliding frames 6 are symmetrically distributed at the front and rear sides of the heat exchange barrel 2, and the two sliding frames 6 are fixedly connected to the heat exchange barrel 2; a sliding block 7 is slidably connected in the sliding frame 6, 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 in the fixing ring 8, the brush 9 is annular and the brush 9 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, and the moving mechanism is used to drive the slider to slide on the sliding frame 6; a rotating mechanism is provided on the brush 9, and the rotating mechanism is used to drive the brush 9 to rotate when the two sliders drive the brush 9 to move; The moving mechanism includes a threaded rod 10, which is located near the sliding frame 6 and has both left and right ends of the threaded rod 10 rotatably connected to the heat exchange barrel 2; the slider is threadedly connected to the threaded rod 10; During operation, by driving the two threaded rods 10 in the heat exchange barrel 2 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, and 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.

[0020] like Figure 5-Figure 7 As shown, as a further solution of the present invention, the rotating mechanism includes a first bevel gear ring 11, and the first bevel gear ring 11 is fixedly connected to the brush 9; a connecting rod 12 is fixedly connected to the rear position 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 is meshed with the bevel gear ring; a rack 15 is provided at the bottom position of the first gear 13 in the heat exchange barrel 2, the rack 15 is meshed with the first gear 13, and the rack 15 is fixedly connected to the inner wall of the heat exchange barrel 2; During operation, when the fixed ring 8 moves, the fixed ring 8 will drive the first gear 13 to move through the connecting rod 12. When the first gear 13 moves, it will start to rotate under the action of the rack 15. When the first gear 13 rotates, it will drive the first bevel gear 14 to rotate. The first bevel gear 14 drives the first bevel gear ring 11 meshing with it to rotate. The first bevel gear ring 11 will drive the brush 9 to rotate relative to the fixed ring 8. When the brush 9 rotates, it can further enhance the cleaning effect of the scale on the heat exchange tube 5.

[0021] like Figure 4As shown, as a further solution of the present invention, the driving mechanism includes four first synchronous wheels 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 wheel 16, and second synchronous wheels 18 are symmetrically provided at the front and rear sides of the first synchronous wheel 16, and the second synchronous wheels 18 are fixedly connected to the threaded rod 10; the synchronous belt 17 is meshed with the first synchronous wheel 16 and the two second synchronous wheels 18 at the same time; a reciprocating mechanism is provided between the two heat exchange barrels 2, and the reciprocating mechanism is used to drive the heat exchange tube 5 to reciprocate in the heat exchange barrel 2; During operation, when the brush 9 moves in the heat exchange barrel 2, in order to ensure that the heat exchange tube 5 will not block the brush 9, by driving the first synchronous wheel 16 on the left or right side of the heat exchange barrel 2 to rotate, the first synchronous wheel 16 will drive the heat exchange tube 5 to rotate. Since the heat exchange tube 5 is in a spiral shape, the brush 9 can move normally in the heat exchange barrel 2 as the heat exchange tube 5 rotates while the brush 9 moves; when the first synchronous wheel 16 rotates, the first synchronous wheel 16 will drive the second synchronous wheels 18 on the front and rear sides to rotate through the synchronous belt 17, and the second synchronous wheel 18 will drive the threaded rod 10 connected thereto to rotate, and when the threaded rod 10 rotates, it will drive the sliding block 7 meshing therewith to move; when the sliding blocks 7 on the front and rear sides move, they will drive the brush 9 to move; under 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 while the heat exchange tube 5 rotates.

[0022] like Figure 4 , Figure 8 As shown, as a further solution of the present invention, the reciprocating mechanism includes two rotating rods 19, and the two rotating rods 19 are symmetrically distributed on the left and right sides of the two heat exchange barrels 2; the rotating rods 19 are simultaneously rotatably connected to the two heat exchange barrels 2, and the upper and lower ends of the rotating rods 19 are symmetrically fixedly connected to the second bevel gears 20; the left and right sides of the heat exchange tube 5 are symmetrically fixedly connected to the second bevel gear rings 21, and the upper and lower second bevel gears 20 are respectively meshed with the upper and lower second bevel gear rings 21; the middle position of the rotating rod 19 is fixedly connected to the third bevel gear 22; an alternating mechanism is provided between the two third bevel gears 22, and the alternating mechanism is used to drive the third bevel gears 22 on the left and right sides to rotate alternately; The alternating mechanism includes a slide rail 23, which is located between the two second support frames 4 and fixedly connected to the two second support frames 4; a fixed frame 24 is slidably connected to the bottom position of the slide rail 23, and a motor 25 is fixedly connected inside the fixed frame 24. The motor 25 is a double-axis motor 25, and the output shafts on the left and right sides of the motor 25 are fixedly connected to the fourth bevel gear 26; the two second support frames 4 are slidably connected to shaft sleeves 27, and the two shaft sleeves 27 are respectively sleeved on the two fourth bevel gears 26 and are rotatably connected to the fourth bevel gear 26; the fourth bevel gear 26 on the right side is meshed 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; The left third bevel gear 22 is located below the left fourth bevel gear 26 and the right third bevel gear 22 is located above the right fourth bevel gear 26; During operation, when the fourth bevel gear 26 on the right side and the third bevel gear 22 on the right side rotate, the motor 25 is started at this time, and the motor 25 drives the third bevel gear 22 on the right side to rotate through the fourth bevel gear 26 on the right side, and the third bevel gear 22 drives the rotating rod 19 connected thereto to rotate, and the rotating rod 19 will drive the two second bevel gears 20 connected thereto to rotate, and the second bevel gears 20 on the upper and lower sides will respectively drive the second bevel gear rings 21 on the upper and lower sides to rotate, and the second bevel gear rings 21 will drive the heat exchange tube 5 connected thereto to rotate, and at this time the heat exchange tube 5 will drive the corresponding brush 9 to move through the first synchronous wheel 16, the synchronous belt 17 and the second synchronous wheel 18; when the brush 9 moves from one end of the heat exchange tube 5 to the other end position, the brush 9 completes a cleaning of the heat exchange tube 5, and then the cylinder 32 is started, and the cylinder 32 drives the fixed frame 24 to move left on the slide rail 23, and the fixed frame 24 drives the motor 2 5 and the two fourth bevel gears 26 all move to the left, and the fourth bevel gear 26 on the right is disengaged from the third bevel gear 22 on the right; when the fourth bevel gear 26 on the left is meshed with the third bevel gear 22 on the left, the cylinder 32 is stopped at this time; since the third bevel gear 22 on the left is located at the bottom position of the fourth bevel gear 26 on the left, when the fourth bevel gear 26 is meshed with the third bevel gear 22, the third bevel gear 22 on the left will be driven 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, and the second bevel gear 20 on the left will drive the heat exchange tube 5 to start rotating in the opposite direction through the second bevel gear ring 21 on the left, and the heat exchange tube 5 will drive the brush 9 to move to the other end position of the heat exchange tube 5 through the first synchronous wheel 16, the synchronous belt 17 and the second synchronous wheel 18, so that the brush 9 can clean the heat exchange tube 5 back and forth.

[0023] like Figure 2As shown, as a further solution of the present invention, a water inlet pipe 28 is connected to the bottom of the lower heat exchange barrel 2; a connecting pipe 29 is provided between the two heat exchange barrels 2, and the connecting pipe 29 is connected to the two heat exchange barrels 2; a drain pipe 30 is connected to the upper position of the upper heat exchange barrel 2; and a heater 31 is fixedly connected to the connecting pipe 29; During operation, cold water can be injected into the lower heat exchange barrel 2 through the water inlet pipe 28. When the water in the lower heat exchange barrel 2 is heated, the heated water is injected into the upper heat exchange barrel 2 through the connecting pipe 29. The water in the upper heat exchange barrel 2 after heat exchange can eventually be discharged through the drain pipe 30. When the heated water in the lower heat exchange barrel 2 enters the upper heat exchange barrel 2 through the connecting pipe 29, the water can be further heated by starting the heater 31, thereby improving the heat exchange effect of the upper heat exchange barrel 2.

Claims

1. A high-efficiency and energy-saving overlapping heat exchanger, comprising a bottom plate (1), characterized in that: Two heat exchange barrels (2) are arranged above the bottom plate (1), and the two heat exchange barrels (2) are stacked and arranged above the bottom plate (1); first support frames (3) are symmetrically fixedly connected to the left and right sides of the bottom of the lower heat exchange barrel (2), and the two first support frames (3) are fixedly connected to the bottom plate (1); second support frames (4) are symmetrically fixedly connected to the left and right sides of the bottom of the upper heat exchange barrel (2), and the bottom ends of the two second support frames (4) are fixedly connected to the lower heat exchange barrel (2); a heat exchange tube (5) is arranged in the heat exchange barrel (2), and the left and right ends of the heat exchange tube (5) are respectively rotatably connected to the left and right sides of the heat exchange barrel (2), and the heat exchange tube (5) is spiral-shaped; a cleaning mechanism is arranged in the heat exchange barrel (2), and the cleaning mechanism is used to clean the scale accumulated on the heat exchange tube (5); a driving mechanism is arranged between the two heat exchange barrels (2), and the driving mechanism is used to simultaneously drive the cleaning mechanisms in the two heat exchange barrels (2) to operate continuously.

2. According to claim 1, a high-efficiency and energy-saving superimposed heat exchanger is characterized in that: The cleaning mechanism comprises two sliding frames (6), the two sliding frames (6) are symmetrically distributed at the front and rear sides of the heat exchange barrel (2), and the two sliding frames (6) are fixedly connected to the heat exchange barrel (2); a sliding block (7) is slidably connected inside the sliding frame (6), 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 in shape 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), and the moving mechanism is used to drive the slider to slide on the sliding frame (6); a rotating mechanism is provided on the brush (9), and the rotating mechanism is used to drive the brush (9) to rotate when the two sliders drive the brush (9) to move.

3. According to claim 2, a high-efficiency and energy-saving superimposed heat exchanger is characterized in that: The moving mechanism comprises a threaded rod (10), the threaded rod (10) being located close to the sliding frame (6) and the left and right ends of the threaded rod (10) being rotatably connected to the heat exchange barrel (2); the sliding block is threadably connected to the threaded rod (10).

4. According to claim 2, a high-efficiency and energy-saving superimposed heat exchanger is characterized in that: The rotating mechanism comprises a first bevel gear ring (11), the first bevel gear ring (11) being fixedly connected to the brush (9); a connecting rod (12) being fixedly connected to the rear position of the fixing ring (8), a first gear (13) and a first bevel gear (14) being rotatably connected to the connecting rod (12), the first gear (13) and the first bevel gear (14) being fixedly connected to each other, and the first bevel gear (14) being meshed with the bevel gear ring; a rack (15) is provided at the bottom position of the first gear (13) in the heat exchange barrel (2), the rack (15) being meshed with the first gear (13), and the rack (15) being fixedly connected to the inner wall of the heat exchange barrel (2).

5. The high-efficiency and energy-saving superimposed heat exchanger according to claim 3 is characterized in that: The driving mechanism comprises four first synchronous wheels (16), the four first synchronous wheels (16) being respectively located at the left and right ends of the two heat exchange tubes (5) and fixedly connected to the heat exchange tubes (5); a synchronous belt (17) is provided on the first synchronous wheel (16), and second synchronous wheels (18) are symmetrically provided at the front and rear sides of the first synchronous wheel (16), and the second synchronous wheels (18) are fixedly connected to the threaded rod (10); the synchronous belt (17) is meshed with the first synchronous wheel (16) and the two second synchronous wheels (18) at the same time; and a reciprocating mechanism is provided between the two heat exchange barrels (2), and the reciprocating mechanism is used to drive the heat exchange tube (5) to reciprocate in the heat exchange barrel (2).

6. The high-efficiency and energy-saving superimposed heat exchanger according to claim 5, characterized in that: The reciprocating mechanism comprises two rotating rods (19), the two rotating rods (19) are symmetrically distributed at left and right sides of the two heat exchange barrels (2); the rotating rods (19) are simultaneously rotationally connected to the two heat exchange barrels (2), and the upper and lower ends of the rotating rods (19) are symmetrically fixedly connected to second bevel gears (20); the left and right sides of the heat exchange tube (5) are symmetrically fixedly connected to second bevel gear rings (21), and the upper and lower second bevel gears (20) are respectively meshed with the upper and lower second bevel gear rings (21); the middle position of the rotating rod (19) is fixedly connected to a third bevel gear (22); an alternating mechanism is provided between the two third bevel gears (22), and the alternating mechanism is used to drive the left and right third bevel gears (22) to rotate alternately.

7. The high-efficiency and energy-saving superimposed heat exchanger according to claim 6, characterized in that: The alternating mechanism comprises a slide rail (23), the slide rail (23) being located between the two second support frames (4) and fixedly connected to the two second support frames (4); a fixed frame (24) being slidably connected to the bottom of the slide rail (23), a motor (25) being fixedly connected inside the fixed frame (24), the motor (25) being a double-shaft motor (25), and fourth bevel gears (26) being fixedly connected to the output shafts on the left and right sides of the motor (25); shaft sleeves (27) being slidably connected to the two second support frames (4), the two shaft sleeves (27) being respectively sleeved on the two fourth bevel gears (26) and being rotationally 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) being fixedly connected to the second support frame (4) on the right side, and the telescopic end of the cylinder (32) being fixedly connected to the fixed frame (24).

8. The high-efficiency and energy-saving superimposed heat exchanger according to claim 7, characterized in that: The third bevel gear (22) on the left side is located below the fourth bevel gear (26) on the left side, and the third bevel gear (22) on the right side is located above the fourth bevel gear (26) on the right side.

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

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