Counter-flow cooler

Abstract

The invention discloses a reverse flow type cooler, which belongs to the technical field of coolers, and comprises a rack, a collecting hopper and a cooling box body are arranged on the rack, a discharging mechanism is arranged between the cooling box body and the collecting hopper, a gap for air inlet is arranged between the discharging mechanism and the collecting hopper, and the cooling box body is arranged in the gap. A rotary feeder is mounted at the top of the cooling box body, a material holding device and a material distributing device are mounted in the cooling box body, an air outlet is formed in the side face of the top of the cooling box body, an air suction system is arranged at the air outlet, and a driving assembly used for driving the material holding device and the material distributing device to rotate is arranged in the cooling box body. The cooling effect of the feed can be kept consistent.

Description

Technical Field

[0001] The present application relates to the technical field of coolers, and in particular to a counter-flow cooler. Background Art

[0002] During the feed production process, pelleted feed, after being pressed at high temperature in the pellet mill, is at a high temperature and contains a large amount of water. Cooling is required to reduce the temperature and moisture content for subsequent storage and transportation. Currently, feed cooling technologies mainly include counterflow coolers, downstream coolers, and crossflow coolers.

[0003] Traditional counterflow coolers use the counterflow principle to exchange heat between cold air and hot particles, thereby achieving a cooling effect. However, the distribution of the cooling airflow in the cooling shell is uneven, resulting in inconsistent feed cooling effects. Summary of the Invention

[0004] In order to improve the problem of inconsistent feed cooling effect, the present application provides a countercurrent cooler.

[0005] The present application provides a counter-flow cooler adopting the following technical solution: A countercurrent cooler comprises a frame, on which a collecting hopper and a cooling box are mounted, a discharge mechanism is mounted between the cooling box and the collecting hopper, a gap for air intake is provided between the discharge mechanism and the collecting hopper, a rotary feeder is mounted on the top of the cooling box, a material handler and a material distributor are mounted inside the cooling box, an air outlet is provided on the top side of the cooling box, a suction system is provided at the air outlet, and a drive assembly for driving the material handler and the material distributor to rotate is provided inside the cooling box.

[0006] By adopting the above technical solution, high-temperature, high-humidity feed particles are fed into the cooling box through a rotary feeder. The feed particles are evenly distributed in the cooling box under the action of the rotating feeder and distributor. The external cold air enters the cooling box through the gap of the discharge mechanism under the action of the suction system. The cold air preferentially contacts the feed particles with lower temperature at the bottom of the cooling box. The temperature of the external air continues to rise during the upward flow and contacts the feed particles with higher temperature, thereby realizing the contact between cold air and cold material and hot air and hot material, so that the particles are gradually cooled in the forward direction, avoiding cracking of the particle surface caused by sudden cooling of the particles, and thus maintaining the cooling effect of the feed consistent.

[0007] Preferably, the driving assembly includes a first gear box fixed in the cooling box body, a rotating shaft 1 is coaxially fixed to the top output end of the first gear box, the material grabber is fixedly connected to the rotating shaft 1, a rotating shaft 2 is coaxially fixed to the bottom output end of the first gear box, the material distributor is fixedly connected to the rotating shaft 2, a driving motor is installed on the side of the cooling box body, and the output end of the driving motor is fixedly connected to the input end of the first gear box.

[0008] By adopting the above technical solution, the drive motor is started, and the drive motor drives the rotating shaft 1 and the rotating shaft 2 to rotate through the first gear box. The rotating shaft 1 drives the feeder to rotate, and the rotating shaft 2 drives the distributor to rotate, so that the feed particles are evenly distributed in the cooling box.

[0009] Preferably, the discharging mechanism includes several rotating plates rotatably mounted on the frame, the rotating plates include an upper flip plate, a lower flip plate is fixed to the bottom surface of the upper flip plate, the bottom surface of the upper flip plate can be fitted with the top surface of the adjacent lower flip plate, and a rotating component for driving several of the rotating plates to rotate synchronously is installed on the frame.

[0010] By adopting the above technical solution, the rotating assembly is used to drive several rotating plates to rotate, and the rotating plates drive the upper flip plate and the lower flip plate to rotate, so that the feed particles can be discharged into the collecting hopper from the gap between the upper flip plate and the adjacent lower flip plate.

[0011] Preferably, the rotating assembly includes a plurality of rotating round rods rotatably mounted on the frame, the rotating round rods are fixedly connected to the side surfaces of the upper flip plate, a connecting plate is fixedly mounted on the outer circumference of the rotating round rod, a connecting rod is hinged between the bottom ends of two adjacent connecting plates, a hydraulic cylinder is hinged on the frame, a driving plate is fixed to the end of the piston rod of the hydraulic cylinder, and the driving plate is fixedly mounted on the outer circumference of one of the rotating round rods.

[0012] By adopting the above technical solution, the hydraulic cylinder is started, and the hydraulic cylinder drives one of the rotating round rods to rotate. The rotating round rod drives the connecting plate to rotate synchronously through the connecting rod, and then drives several rotating round rods to rotate synchronously.

[0013] Preferably, the discharging mechanism includes several fixed frames fixed on the frame, with a distance between adjacent two fixed frames, a movable plate is slidably installed on the frame along its own length direction, and several movable frames arranged at equal intervals are fixed on the bottom surface of the movable plate, and a motor 1 and a second gear box are installed on the frame, the output end of the motor 1 is fixedly connected to the input end of the second gear box, a movable shaft is fixed to the side of the movable plate, and the end of the movable shaft is coaxially fixedly connected to the output end of the second gear box.

[0014] By adopting the above technical solution, motor one is started, and motor one drives the movable shaft to move through the second gear box, and the movable shaft drives the movable plate to move back and forth along the length direction of the frame, so that the movable frame moves to the top of the fixed frame, so that the feed particles fall from the gap between the two adjacent fixed frames.

[0015] Preferably, the discharging mechanism includes a plurality of drive shafts rotatably mounted on the frame, a plurality of impellers are fixedly mounted on the outer circumference of the drive shaft, a sprocket 1 and a sprocket 2 are fixedly mounted on the outer circumference of the drive shaft, a chain 1 is wound around the outer circumference of the sprocket 1 and the adjacent sprocket 2, a motor 2 is mounted on the frame, a driving wheel is coaxially fixedly mounted on the output end of the motor 2, and a chain 2 is wound around the outer circumference of the driving wheel and the adjacent sprocket 2.

[0016] By adopting the above technical solution, motor 2 is started, and motor 2 drives the adjacent drive shaft to rotate through the driving wheel and chain 2. The drive shaft drives several drive shafts to rotate through chain 1, thereby driving multiple impellers to rotate and discharge materials. The action is gentle and does not damage the materials. The materials are discharged completely without residue when clearing the warehouse.

[0017] Preferably, an installation slot is provided on the top surface of the air outlet, a filter frame is installed in the installation slot, a number of activated carbon filter plates are installed in the filter frame, and a fixing plate is fixed to the top surface of the cooling box by bolts, and the bottom surface of the fixing plate abuts against the top surface of the filter frame.

[0018] By adopting the above technical solution, the filter frame is placed in the installation groove, and then the fixing plate is fixed to the filter frame with bolts. The filter frame can filter impurities in the air in the cooling box, and the activated carbon filter plate can adsorb moisture in the air.

[0019] Preferably, a screw is rotatably installed in the air outlet, a scraper is provided on the outer periphery of the screw, the scraper is matched with the screw thread transmission, the side of the scraper can fit with the side of the filter frame, and a motor three is installed on the cooling box body, and the output end of the motor three is coaxially fixedly connected to the end of the screw.

[0020] By adopting the above technical solution, motor three is started, motor three drives the screw to rotate, and the screw drives the scraper to move back and forth along the length direction of the filter frame, thereby scraping off impurities adsorbed on the outer surface of the filter frame to ensure the ventilation effect of the air outlet.

[0021] Preferably, a receiving groove is provided on both sides of the filter frame, two connecting blocks are fixed on the side of the filter frame, a rotating rod is rotatably installed between the two connecting blocks, a baffle is fixed on the outer periphery of the rotating rod, and the baffle can abut against the side of the filter frame, and a negative pressure through hole is provided on the inner wall of the receiving groove away from the baffle, and a torsion spring is provided on the outer periphery of the rotating rod, one end of the torsion spring is fixedly connected to the baffle, and the other end of the torsion spring is fixedly connected to the connecting block, and an abutting rod is fixed on the top of the rotating rod, and the abutting rod and the baffle are arranged perpendicular to each other, and pressure rods are fixed on both sides of the scraper, and the pressure rods can abut against the abutting rod.

[0022] By adopting the above technical solution, when the scraper moves toward the direction close to the baffle, the pressure rod abuts against the abutment rod and pushes the abutment rod to rotate. The abutment rod drives the baffle to rotate through the rotating rod, so that the receiving groove opens, so that the scraper can push the impurities into the receiving groove. Since a negative pressure through hole is provided on the inner wall of the receiving groove away from the baffle, impurities can enter the receiving groove more easily. When the scraper moves in the direction away from the baffle, the baffle is reset under the elastic force of the torsion spring.

[0023] In summary, this application includes at least one of the following beneficial technical effects: 1. High-temperature, high-humidity feed pellets are fed into the cooling box through a rotary feeder. The feed pellets are evenly distributed in the cooling box by the rotating feeder and distributor. Cold air from the outside enters the cooling box through the gaps in the discharge mechanism under the action of the air suction system. The cold air first contacts the feed pellets at the bottom of the cooling box, which are at a lower temperature. As the outside air flows upward, its temperature continues to rise and it contacts the feed pellets at a higher temperature. This allows the cold air to contact the cold material, and the hot air to contact the hot material, causing the pellets to cool gradually in the forward direction. This prevents the pellets from cracking on the surface due to sudden cooling, thereby maintaining consistent cooling effect on the feed. 2. Use the rotating assembly to drive several rotating plates to rotate, and the rotating plates drive the upper flip plate and the lower flip plate to rotate, so that the feed particles can be discharged from the gap between the upper flip plate and the adjacent lower flip plate into the collecting hopper; 3. Start motor 1, which drives the movable shaft to move through the second gear box. The movable shaft drives the movable plate to move back and forth along the length direction of the frame, so that the movable frame moves to the top of the fixed frame, so that the feed particles fall from the gap between the two adjacent fixed frames. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of Example 1 of the present application.

[0025] Figure 2 It is a schematic diagram of the internal structure of the cooling box in Example 1 of the present application.

[0026] Figure 3 It is a structural diagram of the material handling device and the distributor in Example 1 of the present application.

[0027] Figure 4 It is a structural schematic diagram of the discharge mechanism in Example 1 of the present application.

[0028] Figure 5 It is a structural schematic diagram of the rotating plate in Example 1 of the present application.

[0029] Figure 6 It is a structural diagram of the discharge mechanism in Example 2 of the present application.

[0030] Figure 7 It is a structural diagram of the fixed frame and the movable frame in Example 2 of the present application.

[0031] Figure 8 It is a structural diagram of the discharge mechanism in Example 3 of the present application.

[0032] Figure 9 This is a structural diagram of the filter frame in Example 4 of the present application.

[0033] Figure 10 It is a structural schematic diagram of the scraper and baffle in Example 4 of the present application.

[0034] Reference numerals: 1, frame; 11, collecting hopper; 12, cooling box; 13, rotary feeder; 14, material handling device; 15, distributor; 16, air outlet; 17, first gear box; 171, rotating shaft 1; 172, rotating shaft 2; 18, support rod; 19, driving motor; 2, discharge mechanism; 21, rotating plate; 211, upper flip plate; 212, lower flip plate; 22, rotating rod; 23, connecting plate; 24, connecting rod; 25, hydraulic cylinder; 26, driving plate; 3, fixed frame; 31, movable plate; 32. Moving frame; 33. Motor 1; 34. Second gearbox; 35. Moving shaft; 4. Driving shaft; 41. Impeller; 42. Sprocket 1; 43. Sprocket 2; 44. Chain 1; 45. Motor 2; 46. Driving pulley; 47. Chain 2; 5. Filter frame; 51. Activated carbon filter plate; 52. Mounting slot; 53. Fixed plate; 54. Screw; 55. Motor 3; 56. Accommodating slot; 6. Scraper; 61. Pressure rod; 7. Rotating rod; 71. Baffle; 72. Torsion spring; 73. Connecting block; 74. Abutment rod. DETAILED DESCRIPTION

[0035] The following is combined with Figure 1-10 This application is described in further detail.

[0036] The embodiment of the present application discloses a counterflow cooler.

[0037] Example 1 Reference Figure 1 and Figure 2 The counterflow cooler includes a frame 1, on which a hopper 11 and a cooling box 12 are fixed. The cooling box 12 is located above the hopper 11. A discharge mechanism 2 is installed between the cooling box 12 and the hopper 11, and a gap for air intake is provided between the discharge mechanism 2 and the hopper 11. A rotary feeder 13 is installed on the top of the cooling box 12, and a material handler 14 and a distributor 15 are installed inside the cooling box 12. An air outlet 16 is provided on the top side of the cooling box 12, and an air suction system is provided at the air outlet 16.

[0038] Reference Figure 2 and Figure 3 Two horizontally arranged support rods 18 are fixed in the cooling box 12, and a first gearbox 17 is fixed to the two support rods 18. A rotating shaft 171 is coaxially fixed to the top output end of the first gearbox 17, and the feeder 14 is fixedly connected to the rotating shaft 171. A rotating shaft 2 172 is coaxially fixed to the bottom output end of the first gearbox 17, and the distributor 15 is fixedly connected to the rotating shaft 2 172. A drive motor 19 is installed on the side of the cooling box 12, and the output end of the drive motor 19 is fixedly connected to the input end of the first gearbox 17.

[0039] The high-temperature, high-humidity feed pellets are fed into the cooling box 12 through the rotary feeder 13. The feed pellets are evenly distributed in the cooling box 12 under the action of the rotating feeder 14 and the distributor 15. The external cold air enters the cooling box 12 through the gap of the discharge mechanism 2 under the action of the suction system. The cold air preferentially contacts the feed pellets with lower temperature at the bottom of the cooling box 12. The temperature of the external air increases continuously during the upward flow and contacts the feed pellets with higher temperature, thereby realizing the contact between the cold air and the cold material and the hot air and the hot material. The pellets with a temperature of 70°C to 90°C can be cooled to a temperature slightly higher than the room temperature by 3°C to 6°C and can be reduced to a safe moisture content (≤12.5%), which is convenient for the transportation, storage and preservation of the pellets.

[0040] Reference Figure 4 and Figure 5The discharge mechanism 2 includes several rotating plates 21 rotatably mounted on the frame 1. The rotating plates 21 include upper flip plates 211, with lower flip plates 212 fixed to their bottom surfaces. Adjacent upper flip plates are spaced apart, and adjacent lower flip plates are spaced apart, so that the bottom surfaces of the upper flip plates 211 can align with the top surfaces of adjacent lower flip plates 212. Several rotating rods 22 are rotatably mounted on the frame 1 and fixedly connected to the sides of the upper flip plates 211. Connecting plates 23 are sleeved and fixedly mounted on the outer circumferences of the rotating rods 22, with connecting rods 24 hingedly connected between the bottom ends of adjacent connecting plates 23. A hydraulic cylinder 25 is hingedly mounted on the frame 1. A drive plate 26 is fixed to the end of the piston rod of the hydraulic cylinder 25. The drive plate 26 is sleeved and fixedly mounted on the outer circumference of one of the rotating rods 22.

[0041] The implementation principle of Example 1 of the present application is as follows: high-temperature, high-humidity feed particles are fed into the cooling box 12 through the rotary feeder 13, and the feed particles are evenly distributed in the cooling box 12 under the action of the rotating feeder 14 and the distributor 15. The external cold air enters the cooling box 12 through the gap of the discharge mechanism 2 under the action of the suction system, and the cold air preferentially contacts the feed particles with lower temperature at the bottom of the cooling box 12. The temperature of the external air continues to rise during the upward flow, and contacts the feed particles with higher temperature, thereby realizing the contact between cold air and cold material, and the contact between hot air and hot material, so that the particles are gradually cooled in the forward direction, avoiding the cracking of the particle surface caused by sudden cooling of the particles, and thus keeping the cooling effect of the feed consistent.

[0042] Example 2 Reference Figure 6 and Figure 7 The difference between this embodiment and embodiment 1 is that the discharge mechanism 2 includes a plurality of fixed frames 3 fixed to the frame 1, with a distance between adjacent fixed frames 3. A movable plate 31 is slidably mounted on the frame 1 along its length, and a plurality of movable frames 32 are fixed to the bottom surface of the movable plate 31 at equal intervals. A motor 33 and a second gearbox 34 are mounted on the frame 1, and the output end of the motor 33 is fixedly connected to the input end of the second gearbox 34. A movable shaft 35 is fixed to the side of the movable plate 31, and the end of the movable shaft 35 is coaxially fixedly connected to the output end of the second gearbox 34.

[0043] The implementation principle of Example 2 of the present application is as follows: start motor 1 33, motor 1 33 drives the movable shaft 35 to move through the second gear box 34, and the movable shaft 35 drives the movable plate 31 to move back and forth along the length direction of the frame 1, so that the movable frame 32 moves to the top of the fixed frame 3, so that the feed particles fall from the gap between the two adjacent fixed frames 3.

[0044] Example 3 Reference Figure 8This embodiment differs from Embodiment 1 in that the discharge mechanism 2 includes a plurality of drive shafts 4 rotatably mounted on a frame 1. A plurality of impellers 41 are sleeved and fixedly mounted on the outer circumference of the drive shaft 4. A sprocket 1 42 and a sprocket 2 43 are sleeved and fixedly mounted on the outer circumference of the drive shaft 4. A chain 1 44 is looped around the outer circumferences of the sprocket 1 42 and the adjacent sprocket 2 43. A motor 2 45 is mounted on the frame 1. A driving pulley 46 is coaxially fixed to the output end of the motor 2 45. A chain 2 47 is looped around the outer circumferences of the driving pulley 46 and the adjacent sprocket 2 43.

[0045] The implementation principle of Example 3 of the present application is: start motor 2 45, motor 2 45 drives the adjacent drive shaft 4 to rotate through the active wheel 46 and chain 2 47, and the drive shaft 4 drives several drive shafts 4 to rotate through chain 1 44, thereby driving multiple impellers 41 to rotate and discharge materials. The action is gentle and does not damage the materials. The materials are discharged completely without residue when clearing the warehouse.

[0046] Example 4 Reference Figure 9 and Figure 10 The difference between this embodiment and embodiment 1 is that a mounting groove 52 is provided on the top surface of the air outlet 16, a filter frame 5 is installed in the mounting groove 52, and a plurality of activated carbon filter plates 51 are installed in the filter frame 5. A fixing plate 53 is fixed to the top surface of the cooling box 12 by bolts, and the bottom surface of the fixing plate 53 abuts against the top surface of the filter frame 5. A screw rod 54 is rotatably installed in the air outlet 16, and a scraper 6 is sleeved on the outer periphery of the screw rod 54. The scraper 6 is threadedly engaged with the screw rod 54, and the side of the scraper 6 can fit the side of the filter frame 5. A motor 3 55 is installed on the cooling box 12, and the output end of the motor 3 55 is coaxially fixedly connected to the end of the screw rod 54.

[0047] Start the motor 3 55 , the motor 3 55 drives the screw rod 54 to rotate, and the screw rod 54 drives the scraper 6 to move back and forth along the length direction of the filter frame 5 , thereby scraping off the impurities adsorbed on the outer surface of the filter frame 5 to ensure the ventilation effect of the air outlet 16 .

[0048] Reference Figure 9 and Figure 10 , a receiving groove 56 is provided on both sides of the filter frame 5, and a negative pressure through hole is provided on the inner wall of the receiving groove 56 away from the baffle 71. Two connecting blocks 73 are fixed to the side of the filter frame 5, and a rotating rod 7 is rotatably installed between the two connecting blocks 73. A baffle 71 is fixed on the outer periphery of the rotating rod 7, and the baffle 71 can abut against the side of the filter frame 5. A torsion spring 72 is provided on the outer periphery of the rotating rod 7, one end of the torsion spring 72 is fixedly connected to the baffle 71, and the other end of the torsion spring 72 is fixedly connected to the connecting block 73. An abutting rod 74 is fixed to the top of the rotating rod 7, and the abutting rod 74 and the baffle 71 are arranged perpendicular to each other. A pressure rod 61 is fixed on both sides of the scraper 6, and the pressure rod 61 can abut against the abutting rod 74.

[0049] The implementation principle of Example 4 of the present application is as follows: when the scraper 6 moves toward the direction close to the baffle 71, the pressure rod 61 abuts against the abutment rod 74 and pushes the abutment rod 74 to rotate, and the abutment rod 74 drives the baffle 71 to rotate through the rotating rod 7, so that the receiving groove 56 opens, so that the scraper 6 can push the impurities into the receiving groove 56. Since a negative pressure through hole is provided on the inner wall of the receiving groove 56 away from the baffle 71, impurities can enter the receiving groove 56 more easily. When the scraper 6 moves in the direction away from the baffle 71, the baffle 71 is reset under the elastic force of the torsion spring 72.

[0050] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A counter-flow cooler, characterized in that: The invention comprises a frame (1), wherein a collecting hopper (11) and a cooling box (12) are installed on the frame (1), a discharging mechanism (2) is installed between the cooling box (12) and the collecting hopper (11), a gap for air intake is provided between the discharging mechanism (2) and the collecting hopper (11), a rotary feeder (13) is installed on the top of the cooling box (12), a material handler (14) and a material distributor (15) are installed in the cooling box (12), an air outlet (16) is provided on the top side of the cooling box (12), an air suction system is provided at the air outlet (16), and a driving component for driving the material handler (14) and the material distributor (15) to rotate is provided in the cooling box (12).

2. The counter-flow cooler according to claim 1, characterized in that: The driving assembly includes a first gear box (17) fixed in the cooling box body (12), a rotating shaft 1 (171) is coaxially fixed to the top output end of the first gear box (17), the material handler (14) is fixedly connected to the rotating shaft 1 (171), a rotating shaft 2 (172) is coaxially fixed to the bottom output end of the first gear box (17), the material distributor (15) is fixedly connected to the rotating shaft 2 (172), a driving motor (19) is installed on the side of the cooling box body (12), and the output end of the driving motor (19) is fixedly connected to the input end of the first gear box (17).

3. The counter-flow cooler according to claim 1, characterized in that: The discharging mechanism (2) comprises a plurality of rotating plates (21) rotatably mounted on the frame (1), the rotating plates (21) comprising an upper flip plate (211), a lower flip plate (212) being fixed to the bottom surface of the upper flip plate (211), the bottom surface of the upper flip plate (211) being capable of abutting against the top surface of the adjacent lower flip plate (212), and a rotating assembly for driving the plurality of rotating plates (21) to rotate synchronously is mounted on the frame (1).

4. The counter-flow cooler according to claim 3, characterized in that: The rotating assembly comprises a plurality of rotating rods (22) rotatably mounted on the frame (1), the rotating rods (22) being fixedly connected to the side surfaces of the upper flip plate (211), a connecting plate (23) being sleeved and fixed on the outer circumference of the rotating rods (22), a connecting rod (24) being hinged between the bottom ends of two adjacent connecting plates (23), a hydraulic cylinder (25) being hinged on the frame (1), a driving plate (26) being fixed to the end of the piston rod of the hydraulic cylinder (25), and the driving plate (26) being sleeved and fixed on the outer circumference of one of the rotating rods (22).

5. The counter-flow cooler according to claim 1, characterized in that: The discharging mechanism (2) comprises a plurality of fixed frames (3) fixed on the frame (1), with a distance between two adjacent fixed frames (3), a movable plate (31) being slidably mounted on the frame (1) along its own length direction, a plurality of movable frames (32) being fixed on the bottom surface of the movable plate (31) at equal intervals, a motor (33) and a second gear box (34) being mounted on the frame (1), an output end of the motor (33) being fixedly connected to an input end of the second gear box (34), a movable shaft (35) being fixedly mounted on the side of the movable plate (31), and an end of the movable shaft (35) being coaxially fixedly connected to the output end of the second gear box (34).

6. The counter-flow cooler according to claim 1, characterized in that: The discharging mechanism (2) comprises a plurality of drive shafts (4) rotatably mounted on the frame (1); a plurality of impellers (41) are sleeved and fixed on the outer circumference of the drive shaft (4); a sprocket 1 (42) and a sprocket 2 (43) are sleeved and fixed on the outer circumference of the drive shaft (4); a chain 1 (44) is wound around the outer circumference of the sprocket 1 (42) and the adjacent sprocket 2 (43); a motor 2 (45) is mounted on the frame (1); a driving wheel (46) is coaxially fixed to the output end of the motor 2 (45); a chain 2 (47) is wound around the outer circumference of the driving wheel (46) and the adjacent sprocket 2 (43).

7. The counter-flow cooler according to claim 1, characterized in that: The top surface of the air outlet (16) is provided with an installation slot (52), a filter frame (5) is installed in the installation slot (52), and a plurality of activated carbon filter plates (51) are installed in the filter frame (5). The top surface of the cooling box (12) is fixed with a fixing plate (53) by bolts, and the bottom surface of the fixing plate (53) is in contact with the top surface of the filter frame (5).

8. The counter-flow cooler according to claim 7, characterized in that: A screw rod (54) is rotatably installed in the air outlet (16), and a scraper (6) is sleeved on the outer periphery of the screw rod (54). The scraper (6) and the screw rod (54) are threadedly matched, and the side of the scraper (6) can fit with the side of the filter frame (5). A motor three (55) is installed on the cooling box (12), and the output end of the motor three (55) is coaxially fixedly connected to the end of the screw rod (54).

9. The counter-flow cooler according to claim 8, characterized in that: The filter frame (5) is provided with a receiving groove (56) on both sides, two connecting blocks (73) are fixed on the side of the filter frame (5), a rotating rod (7) is rotatably installed between the two connecting blocks (73), a baffle (71) is fixedly sleeved on the outer periphery of the rotating rod (7), and the baffle (71) can abut against the side of the filter frame (5), and a negative pressure through hole is provided on the inner wall of the receiving groove (56) away from the baffle (71), and the rotating rod (7) is provided with a negative pressure through hole. A torsion spring (72) is sleeved on the outer periphery of the rotating rod (7), one end of the torsion spring (72) is fixedly connected to the baffle (71), and the other end of the torsion spring (72) is fixedly connected to the connecting block (73). A contact rod (74) is fixed to the top end of the rotating rod (7), and the contact rod (74) and the baffle (71) are arranged perpendicular to each other. A pressure rod (61) is fixed on both sides of the scraper (6), and the pressure rod (61) can contact the contact rod (74).

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