Industrialized freezing drum with co2 as refrigerant and system

Abstract

The application relates to the technical field of frozen rotating drums, and discloses an industrialized frozen rotating drum taking CO2 as a cold carrier and a system, which comprises a tubular rotating drum, an end cover, a shaft pipe, a hollow pipe and a spraying mechanism; the rotating drum and the end cover form a cold carrier containing cavity, and the outer wall is used for freezing glue liquid and stably outputting glue film; the first pipe body at the two ends of the hollow pipe is respectively connected with a cover plate and an L-shaped liquid discharge pipe; the spraying mechanism comprises first and second storage tanks, and the cold carrier is sprayed out through second pipe bodies arranged at equal angles, a three-way pipe and a nozzle; a gas-liquid separation pipe cooperates with an S-shaped pipe and a fifth pipe body to realize mixed atomization spraying of the liquid and gaseous cold carriers; the nozzle is provided with a three-way flow channel or a branch nozzle to realize uniform or spiral spraying; the application has reasonable structure design, the flow path of the cold carrier in the containing cavity is smooth, the spraying mechanism can uniformly spray out the cold carrier, the temperature of the outer wall of the rotating drum is uniform, the glue liquid can be stably frozen, and the stable output of the glue film is ensured; the setting of the liquid discharge pipe is beneficial to the discharge of the cold carrier, and the working efficiency of the equipment is improved.

Description

Technical Field

[0001] This invention relates to the field of refrigeration drum technology, and particularly to an industrial refrigeration drum and system using CO2 as a refrigerant. Background Technology

[0002] With the increasing demand for high-performance adhesive films in fields such as new energy, electronic information, and medical health, such as lithium battery separators, optical protective films, and medical dressing substrates, stringent requirements are being placed on the thickness accuracy (error must be controlled within ±1%), surface flatness (roughness Ra≤0.1μm), and physical stability under low-temperature environments. As a core component in the molding process, the freezing drum's outer wall temperature fluctuation (≤±0.5℃) and the uniformity of coolant distribution directly determine the microstructure and macroscopic properties of the adhesive film, making it crucial for overcoming the technological bottlenecks in high-end adhesive film production.

[0003] Currently, existing freezing drums have some shortcomings in terms of refrigerant usage and structural design. For example, the refrigerant flow path inside the drum is not smooth enough, resulting in uneven temperature distribution on the outer wall of the drum, affecting the freezing effect of the adhesive and consequently leading to poor output stability of the adhesive film. At the same time, the refrigerant spraying mechanism is poorly designed, failing to achieve uniform refrigerant spraying, further exacerbating the problem of uneven temperature on the outer wall of the drum. Furthermore, the drainage structure is not conducive to the effective discharge of refrigerant, affecting equipment efficiency and increasing production costs.

[0004] Therefore, there is an urgent need for a refrigeration drum with a reasonable structural design that allows the refrigerant to flow smoothly and be sprayed evenly inside the drum, and facilitates the discharge of the refrigerant, in order to solve the problems existing in the current technology and improve the quality and efficiency of film production. Summary of the Invention

[0005] The purpose of this invention is to provide an industrial refrigeration drum and system using CO2 as a refrigerant, thereby solving the problems mentioned in the background art.

[0006] The technical solution adopted in this invention is as follows: an industrial refrigeration drum using CO2 as a refrigerant, comprising: a drum, the drum being a tubular structure with end caps at both ends, the drum and the two end caps forming a refrigerant receiving cavity; the outer wall of the drum being used to freeze the adhesive and stably output the adhesive film; a shaft hole being provided in the center of the end caps, a shaft tube being installed in the shaft hole, a sealed bearing being installed on the shaft tube, and a hollow tube being rotatably connected to the sealed bearing, the length of the hollow tube being greater than the length of the shaft tube; the hollow tube located in the receiving cavity having a first tube body, a cover plate being connected to the free end of the first tube body on the left side, and a drain pipe being connected to the free end of the first tube body on the right side, the drain pipe being used to discharge the refrigerant from the receiving cavity, its shape being L-shaped and its lower end facing the inner bottom surface of the drum; a spraying mechanism being installed between the two first tube bodies, the spraying mechanism being used to spray out the refrigerant.

[0007] The inner side of the end cap is provided with a spherical groove, and the spherical groove is provided with staggered ribs.

[0008] A second valve body is installed on the rear tube cap. A guide tube is slidably connected to the second valve body. The free end of the guide tube is located inside a three-way tube, and a liquid port connecting to the three-way tube is opened on its side wall. A third worm gear is provided on the second valve body. A first sector gear is meshed on the third worm gear. An incomplete gear is connected to the first sector gear. The side wall of the guide tube is provided with a tooth groove that meshes with the incomplete gear. A third valve body is installed on the second valve body. A push rod is slidably connected to the third valve body. A return spring is connected between the push rod and the third valve body. The push rod is connected to the guide tube through a needle rod. An interface for pushing the push rod is provided on the third valve body.

[0009] The nozzle is rotatably connected to the third pipe opening, and four branch nozzles arranged at equal angles are connected to the third pipe opening. A second nozzle is installed on each branch nozzle, and the second nozzle is used to spray out a spiral-shaped coolant.

[0010] The first tube on the right side is connected to a blocking plate, and a ninth tube is connected to the blocking plate. The length of the ninth tube is greater than that of the hollow tube. Two liquid outlet tubes facing the bottom of the drum are connected to the ninth tube located in the receiving cavity. The lower end of the liquid outlet tube is connected to an arched filter head with surface-distributed filter holes. Two air outlet tubes facing the top of the drum are also connected to the ninth tube. The end of the liquid outlet tube is connected to a liquid-proof cap, and an air inlet is opened on its side wall below the liquid-proof cap. A baffle is connected inside the ninth tube, dividing it into a liquid delivery channel and a gas delivery channel.

[0011] The ninth tube is rotatably connected to the blocking plate. A third gear is connected to the ninth tube outside the hollow tube. A second sector gear meshes with the third gear. A fourth bearing seat is rotatably connected to the second sector gear and is mounted on the frame. A guide rail is connected to the second sector gear. A drive rod is slidably connected to the guide rail. A rotating plate is connected to the drive rod. A fifth bearing seat is connected to the rotating plate and is mounted on the frame. The rotating plate is driven by a drive motor. The drive rod is located at an eccentric position on the rotating plate.

[0012] The beneficial effects of this invention are as follows: This application significantly improves the performance of the freezing drum through multi-dimensional structural optimization: the annular groove at the drum port avoids adhesive adhesion; combined with the fan-shaped storage tank of the spraying mechanism, gas-liquid mixing atomization, and swingable / spiral nozzles, it achieves uniform distribution of the refrigerant and efficient freezing, ensuring the quality of the adhesive film; the T-shaped shaft tube, L-shaped drain pipe, and baffle gas-liquid flow channel design ensure smooth refrigerant circulation and separate discharge of gaseous and liquid media; the lifting platform adjusts the liquid level in the material tank; the ninth tube filter head is linked to the swing mechanism to prevent solid blockage; gear transmission and pneumatic drive improve equipment stability. Overall, it solves the problems of adhesive film freezing uniformity, removal difficulty, and equipment reliability, significantly improving industrial production efficiency and adhesive film quality. Attached Figure Description

[0013] Figure 1 This is a side view sectional structural diagram of this application.

[0014] Figure 2 This is a schematic diagram of the front cross-sectional structure of this application.

[0015] Figure 3 This is a schematic diagram of the three-dimensional structure of the rotating drum.

[0016] Figure 4 This is a three-dimensional structural diagram of the end cap.

[0017] Figure 5 This is a side view sectional diagram of the shaft tube.

[0018] Figure 6 This is a side view sectional diagram of the injection mechanism.

[0019] Figure 7 This is a three-dimensional structural diagram of the first storage tank.

[0020] Figure 8 This is a schematic diagram of the main cross-sectional structure of the first storage tank.

[0021] Figure 9 This is a schematic diagram of the three-dimensional structure of the nozzle.

[0022] Figure 10 This is a top view cross-sectional diagram of the screw.

[0023] Figure 11 This is a schematic diagram of the front cross-sectional structure of the gas-liquid separator.

[0024] Figure 12 This is a side view cross-sectional diagram of the gas-liquid separator.

[0025] Figure 13 This is a three-dimensional structural diagram of a gas-liquid separator.

[0026] Figure 14 This is a schematic diagram of the front cross-sectional structure of an S-shaped tube.

[0027] Figure 15 This is a schematic diagram of the three-dimensional structure of the sixth tube.

[0028] Figure 16 This is a schematic diagram of the main cross-sectional structure of the nozzle.

[0029] Figure 17 This is a side view of the first bearing housing.

[0030] Figure 18 This is a schematic diagram of the three-dimensional structure of the material pool.

[0031] Figure 19 This is a schematic diagram of the front cross-sectional structure of the airbag.

[0032] Figure 20 This is a schematic diagram of the three-dimensional structure of the slide bar.

[0033] Figure 21 This is a three-dimensional structural diagram of the catheter.

[0034] Figure 22 This is a three-dimensional structural diagram of the first link.

[0035] Figure 23 This is a schematic diagram of the three-dimensional structure of the top plate.

[0036] Figure 24 This is a top-view cross-sectional structural diagram of the rotating rod.

[0037] Figure 25 This is a three-dimensional structural diagram of the first valve body.

[0038] Figure 26 This is a schematic diagram of the front cross-sectional structure of the piston rod.

[0039] Figure 27 This is a schematic diagram of the side cross-sectional structure of the pipeline.

[0040] Figure 28 This is a top-view cross-sectional structural diagram of the push rod.

[0041] Figure 29 This is a three-dimensional structural diagram of the branch nozzle.

[0042] Figure 30 This is a side view cross-sectional diagram of the liquid outlet pipe.

[0043] Figure 31 This is a side view cross-sectional diagram of the air outlet pipe.

[0044] Figure 32 This is a schematic diagram of the three-dimensional structure of the guide rail.

[0045] Figure 33 This is a flowchart of the refrigerant system.

[0046] In the diagram: 1. Drum; 2. End cap; 3. Shaft tube; 4. Sealed bearing; 5. Hollow tube; 6. First tube body; 7. Cover plate; 8. Drain pipe; 9. Spray mechanism; 10. Annular groove; 11. Limiting groove; 12. Spherical groove; 13. Rib plate; 14. Positioning nut; 15. First storage tank; 16. Second storage tank; 17. Reinforcing rib; 18. Second tube body; 19. T-joint; 20. Pipe cap; 21. Third tube body; 22. Fourth tube body; 23. Nozzle; 24. Screw; 25. Plug; 26. Tightening head; 27. 28. Fifth pipe body; 29. ​​Gas-liquid separator pipe; 30. U-shaped pipe; 31. S-shaped pipe; 32. Branch pipe; 33. Hose; 34. Sixth pipe body; 35. Seventh pipe body; 36. First nozzle; 37. First bearing seat; 38. First base; 39. Second gear; 40. First motor; 41. Second base; 42. Material tank; 43. Eighth pipe body; 44. Valve; 45. Airbag; 46. Base plate; 47. Slide rod; 48. Guide tube; 49. Top plate; 50. Support rod; 51. Lead screw; 52. 53. First worm gear; 54. Round tube; 55. Second bearing housing; 56. First worm; 57. Slide groove; 58. Clamping plate; 59. First connecting rod; 60. Second connecting rod; 61. Rotating shaft; 62. Second worm gear; 63. Third bearing housing; 64. Ball bearing; 65. Bushing; 66. Positioning rod; 67. Rotating rod; 68. First valve body; 69. Third connecting rod; 70. Fourth connecting rod; 71. Piston rod; 72. Cylinder body; 73. Pipe; 74. Second valve body; 75. Conductor pipe; 76. Third 77. Worm gear; 78. First sector gear; 79. Incomplete gear; 80. Third valve body; 81. Push rod; 82. Return spring; 83. Needle rod; 84. Branch nozzle; 85. Second nozzle; 86. Blocking plate; 87. Ninth tube body; 88. Liquid outlet pipe; 89. Arched filter head; 90. Air outlet pipe; 91. Liquid-proof cap; 92. Partition plate; 93. Third gear; 94. Second sector gear; 95. Fourth bearing seat; 96. Guide rail; 97. Drive rod; 98. Rotating plate; 99. Fifth bearing seat; 90. Drive motor. Detailed Implementation

[0047] The embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0048] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0049] Furthermore, the terms “first,” “second,” “third,” “fourth,” “fifth,” “sixth,” “seventh,” “eighth,” “ninth,” and “tenth” are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated.

[0050] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation", "connection", and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0051] like Figure 1 and Figure 2As shown in Embodiment 1, an industrial refrigeration drum 1 using CO2 as a refrigerant includes a drum 1, which is a tubular structure. End caps 2 are bolted to both ends of the drum 1, forming a refrigerant receiving cavity with the drum 1 and the two end caps 2. The outer wall of the drum 1 is used to freeze the adhesive and stabilize the output film. The end caps 2 have a central shaft hole, in which a shaft tube 3 is installed. A sealed bearing 4 is installed on the shaft tube 3, and a hollow tube 5 is rotatably connected to the sealed bearing 4. The length of the hollow tube 5 is greater than the length of the shaft tube 3. The hollow tube 5 located in the receiving cavity is connected to a first tube body 6 via a flange. A cover plate 7 is connected to the free end of the first tube body 6 on the left side. A drain pipe 8 is connected to the free end of the first tube body 6 on the right side. The drain pipe 8 is used to discharge the refrigerant from the receiving cavity. The drain pipe 8 is L-shaped, with its lower end facing the inner bottom surface of the drum 1. A spray mechanism 9 is installed between the two first tube bodies 6, used to spray out the refrigerant. The outlet end of the drain pipe 8 is connected to the compressor through a low-temperature resistant stainless steel pipe to extract the refrigerant from the drum 1.

[0052] Movement Process: The drum 1 forms a refrigerant receiving cavity through the end caps 2 at both ends. The shaft tube 3 is installed in the central shaft hole of the end cap 2, and the sealed bearing 4 allows the hollow tube 5 to be rotatably connected to the shaft tube 3. The refrigerant enters from the hollow tube 5 on one side, is sprayed out through the left first tube body 6 and the spraying mechanism 9, flows in the receiving cavity, and is discharged through the drain pipe 8 connected to the right first tube body 6. The drain pipe 8 is L-shaped, with its lower end facing the inner bottom surface of the drum 1, ensuring effective discharge of the refrigerant. When the drum 1 rotates, its outer wall comes into contact with the adhesive, achieving freezing of the adhesive and stable output of the adhesive film. Beneficial Effects: This structure is reasonably designed, the flow path of the refrigerant in the receiving cavity is smooth, and the spraying mechanism 9 can spray the refrigerant evenly, making the temperature of the outer wall of the drum 1 uniform, thereby stabilizing the freezing of the adhesive and ensuring stable output of the adhesive film. The drain pipe 8 facilitates the discharge of the refrigerant and improves the working efficiency of the equipment.

[0053] like Figure 3As shown, as an optimization of Embodiment 1, considering that the drums 1 are all circular tubes 53, after the outer wall of the drum 1 is immersed in the adhesive, the adhesive will adhere to the side of the port and be difficult to remove. The outer sides of the two ports of the drum 1 have annular grooves 10, which can prevent the adhesive from adhering to the side of the port and facilitate the removal of the adhesive film. The inner sides of the two ports of the drum 1 have limiting grooves 11, which are used to install the end cap 2. The limiting grooves 11 have bolt holes for fixing the end cap 2. Movement process: When the drum 1 is immersed in the adhesive, the adhesive will adhere to the outer wall of the drum 1. Since the outer sides of the two ports of the drum 1 are provided with annular grooves 10, the adhesive will be difficult to adhere to the side of the port due to the structural limitation of the annular grooves 10. When the drum 1 rotates to remove the adhesive, the adhesive at the annular grooves 10 can also be removed more smoothly, which facilitates the removal of the adhesive film. When the end cap 2 is installed, it is embedded in the limiting grooves 11 on the inner sides of the two ports of the drum 1 and fixed by bolts to ensure that the end cap 2 is installed in an accurate and stable position. Beneficial effects: The annular groove 10 effectively solves the problem of adhesive being difficult to remove from the side of the port, improving the quality of the adhesive film and production efficiency. The design of the limiting groove 11 facilitates the installation and positioning of the end cap 2, enhancing the overall sealing and stability of the equipment.

[0054] like Figure 4 As shown, as an optimization of Embodiment 1, the inner surface of the end cap 2 has a spherical groove 12, on which staggered ribs 13 are arranged. Movement process: The spherical groove 12 on the inner surface of the end cap 2 provides a more reasonable space for the flow of refrigerant within the receiving cavity. The staggered arrangement of the ribs 13 alters the flow path of the refrigerant, allowing it to fully contact and mix with the inner surface of the end cap 2 during flow. Beneficial effects: The design of the spherical groove 12 and ribs 13 increases the strength of the end cap 2, while optimizing the flow state of the refrigerant within the receiving cavity, improving the uniformity of refrigerant distribution, and thus enhancing the freezing effect of the outer wall of the drum 1.

[0055] like Figure 5 As shown, as an optimization of Embodiment 1, the shaft tube 3 has a T-shaped tubular structure. A bearing mounting port is provided at the large-diameter end of the shaft tube 3, where a sealed bearing 4 is installed. A positioning nut 14 is threadedly connected to the small-diameter end of the shaft tube 3, fixing the shaft tube 3 to the end cover 2. Movement process: The T-shaped tubular structure of the shaft tube 3, with the sealed bearing 4 installed at the bearing mounting port at the large-diameter end, allows the hollow tube 5 to rotate around the shaft tube 3. The small-diameter end is fixed to the end cover 2 by the positioning nut 14, ensuring a stable connection between the shaft tube 3 and the end cover 2. When the drum 1 rotates, the shaft tube 3 rotates with the drum 1, and the hollow tube 5 rotates relative to the shaft tube 3 under the action of the sealed bearing 4, realizing the input and output of the refrigerant. Beneficial effects: The structure of the shaft tube 3 facilitates the installation and fixing of the sealed bearing 4. The positioning nut 14 ensures the reliability of the connection between the shaft tube 3 and the end cover 2, making the input and output of the refrigerant stable during the rotation of the drum 1, thus improving the operational stability of the equipment.

[0056] like Figures 6-10 As shown, as an optimization of Embodiment 1, the spraying mechanism 9 includes a first storage tank 15 and a second storage tank 16. The first storage tank 15 and the second storage tank 16 are fan-shaped and located on the upper side of the first pipe body 6. The first storage tank 15 and the second storage tank 16 have through holes communicating with the first pipe body 6. Reinforcing ribs 17 are connected at the angle between the first storage tank 15 and the second storage tank 16 and the first pipe body 6. Second pipe bodies 18 are installed on the outer surfaces of the first storage tank 15 and the second storage tank 16. Several second pipe bodies 18 are arranged at equal angles, and the free ends of the second pipe bodies 18 are connected to... A three-way pipe 19 has a pipe cap 20 connected to its outer end. A third pipe body 21 is installed between the three-way pipe 19 and the pipe cap 20. The third pipe body 21 has four equally spaced fourth pipe bodies 22, and nozzles 23 are installed on the fourth pipe bodies 22. A screw 24 is threaded onto the pipe cap 20 on the rear side. A plug 25 is installed on the screw 24 inside the three-way pipe 19. The plug 25 is used to block the refrigerant from the second storage tank 16 from entering the third pipe body 21. A screw head 26 is installed on the screw 24 outside the three-way pipe 19. By controlling the opening and closing of the plug 25, the reverse flushing of the spray mechanism 9 can be achieved. Movement process: The refrigerant enters the first storage tank 15 and the second storage tank 16 from the first pipe body 6, and is evenly distributed into the two fan-shaped storage tanks through a through hole connected to the first pipe body 6. Then it flows through the second pipe bodies 18 arranged at equal angles to the three-way pipe 19, and is then sprayed out through the fourth pipe body 22 and nozzles 23 on the third pipe body 21. When backflushing is required, rotating the screw head 26 moves the plug 25 on the screw 24, closing or opening the channel between the second storage tank 16 and the third pipe 21 to achieve backflushing. Beneficial effects: The design of the spray mechanism 9 allows for uniform refrigerant spraying, and the fan-shaped storage tank and reinforcing ribs 17 improve structural strength and the uniformity of refrigerant distribution. The backflushing function facilitates the cleaning of impurities or solid refrigerant within the spray mechanism 9, ensuring spraying effectiveness and extending equipment lifespan.

[0057] like Figure 11 As shown, as an optimization of Embodiment 1, the rightmost second tube 18 is shorter than the other second tubes 18. The rightmost second tube 18 is used to accelerate the freezing of the adhesive film. Movement process: During the rotation of the drum 1 to freeze the adhesive film, the refrigerant sprayed from the shorter rightmost second tube 18, due to its closer proximity to a specific location on the adhesive film or a different flow distribution, can freeze that location of the film more quickly. Beneficial effects: By shortening the length of the rightmost second tube 18, accelerated freezing of a specific area of ​​the adhesive film is achieved, improving the efficiency and uniformity of film freezing and meeting different production needs.

[0058] like Figures 11-15As shown, as an optimization of Embodiment 1, considering that there will be a portion of vaporized refrigerant in the upper layer of the first storage tank 15, the lower end of the second pipe 18 is connected to a fifth pipe 27, which faces the first pipe 6 and is used to transport the liquid refrigerant in the lower layer; a gas-liquid separation pipe 28 is installed on the top surface of the first storage tank 15, the lower end of which extends into the lower layer of the first storage tank 15, and a U-shaped pipe 29 is connected to the lower end of the gas-liquid separation pipe 28. The gas-liquid separation pipe 28 is located in the arc-shaped part of the U-shaped pipe 29, and a U-shaped pipe 29 is installed at the upper end of the U-shaped pipe 29. The S-shaped tube 30 is used to transport the upper layer of gaseous refrigerant. The S-shaped tube 30 is horizontally arranged, and its first arc segment has a liquid hole that allows the liquid refrigerant to flow back into the first storage tank 15. A branch pipe 31 is connected to the gas-liquid separator 28 located outside the first storage tank 15. The branch pipe 31 is connected to a sixth pipe body 33 via a flexible hose 32. The sixth pipe body 33 is connected to a seventh pipe body 34 arranged at equal intervals, which is connected to a nozzle 23. This mixture of liquid and gaseous refrigerant is sprayed out, resulting in uniform refrigerant atomization and good cooling effect. Movement process: The upper layer of gaseous refrigerant in the first storage tank 15 is discharged through the U-shaped tube 29 and the S-shaped tube 30 at the lower end of the gas-liquid separator 28. The liquid hole on the S-shaped tube 30 allows the liquid refrigerant to flow back. The lower layer of liquid refrigerant is transported to the second pipe body 18 through the fifth pipe body 27. The gaseous refrigerant is mixed with the liquid refrigerant through branch pipe 31, hose 32, sixth tube 33, and seventh tube 34, and then sprayed out at nozzle 23. Beneficial effects: The gas-liquid separation and mixing spray structure ensures thorough mixing and atomization of the liquid and gaseous refrigerants, resulting in uniform spraying and improved cooling efficiency, avoiding the shortcomings of single-state refrigerant spraying.

[0059] like Figure 16 As shown, as an optimization of Embodiment 1, the nozzle 23 has a three-way flow channel. The nozzle 23 includes a first port, a second port, and a third port communicating with the three-way flow channel. The first port is used to connect to the fourth tube 22 and is located in the vertical direction. The second port is used to connect to the seventh tube 34 and is located in the horizontal direction. A first nozzle 35 is installed on the third port. Movement process: The refrigerant from the fourth tube 22 enters the nozzle 23 vertically from the first port, and the refrigerant from the seventh tube 34 enters the nozzle 23 horizontally from the second port. After mixing in the three-way flow channel, they are sprayed out from the first nozzle 35 at the third port. Beneficial effects: The three-way flow channel nozzle 23 structure allows for thorough mixing of refrigerants from different sources, achieving uniform spraying and improving refrigeration efficiency and effect.

[0060] like Figure 17As shown, as an optimization of Embodiment 1, two shaft tubes 3 are rotatably connected to first bearing seats 36, and first machine bases 37 are connected to the first bearing seats 36. A first gear 38 is mounted on one side of the shaft tube 3, and a second gear 39 meshes with the first gear 38. The second gear 39 is driven by a first motor 40, and a second machine base 41 is mounted on the first motor 40. Movement process: The first motor 40 drives the second gear 39 to rotate, which in turn drives the shaft tube 3 on one side to rotate through the meshing first gear 38, thereby causing the drum 1 to rotate. The first bearing seats 36 and the first machine base 37 support the shaft tubes 3, ensuring the stability of the rotation of the drum 1. Beneficial effects: The gear transmission mechanism provides stable power transmission, enabling the drum 1 to rotate at a uniform speed, ensuring the stability and consistency of the film freezing process.

[0061] like Figure 18 and Figure 19 As shown, as an optimization of Embodiment 1, it also includes a material tank 42, which is used to store the adhesive liquid. An eighth tube 43, L-shaped, is installed inside the material tank 42. A valve 44 is installed on the eighth tube 43 located outside the material tank 42. An air bladder 45 is installed on the second tube 18 located inside the material tank 42. The air bladder 45 is used to regulate the liquid level in the material tank 42. The eighth tube 43 inside the material tank 42 controls the inflow and outflow of the adhesive liquid, and the valve 44 regulates the flow rate. The air bladder 45 expands or contracts according to changes in the adhesive liquid level, thereby regulating the liquid level in the material tank 42.

[0062] like Figures 20-23As shown, as an optimization of Embodiment 1, it also includes a lifting platform for supporting the material pool 42. The lifting platform includes a base plate 46, on which slide rods 47 arranged in a matrix are installed. A guide tube 48 is slidably connected to the slide rods 47, and a top plate 49 is connected to the top surface of the guide tube 48. The top plate 49 is used to support the material pool 42. A support rod 50 is installed between adjacent guide tubes 48. A lead screw 51 is rotatably connected to the support rod 50. A first worm gear 52 is threaded onto the lead screw 51. A circular tube 53 is rotatably connected to the first worm gear 52. The circular tube 53 is concentric with the lead screw 51. The lower end of the circular tube 53 is connected to the base plate 46. A second bearing seat 54 is provided on the side wall of the circular tube 53. A first worm gear 55 is mounted on the second bearing seat 54, and the first worm gear 55 meshes with the first worm wheel 52. The top plate 49 has two symmetrically arranged sliding grooves 56, and a clamping plate 57 is slidably connected within each groove 56 to hold the material pool 42. A first connecting rod 58 is rotatably connected to the clamping plate 57, and the free ends of the two first connecting rods 58 are connected together by a second connecting rod 59. A rotating shaft 60 is connected in the middle of the second connecting rod 59, and a second worm wheel 61 is mounted on the rotating shaft 60. A second worm gear 62 meshes with the second worm wheel 61, and a third bearing seat 63 is mounted on the second worm gear 62. The third bearing seat 63 is connected to the circular tube 53. Movement: The sliding rod 47 and guide tube 48 on the bottom plate 46 of the lifting platform support the top plate 49, and the top plate 49 is driven to rise and fall through the lead screw 51 and worm wheel mechanism, thereby driving the material pool 42 to rise and fall. Beneficial effects: The liquid level adjustment mechanism ensures the stability of the liquid level in the material tank 42, and the lifting platform enables the material tank 42 to adapt to the drum 1 at different heights, improving the versatility and flexibility of the equipment.

[0063] like Figures 24-27As shown in Embodiment 2, unlike Embodiment 1, considering that the nozzles 23 are all fixed-point sprayers with relatively concentrated spray points, a ball bearing 64 is connected to the rightmost second tube 18. A bushing 65 is connected to the ball bearing 64 and is connected to the tee pipe 19. A positioning rod 66 is connected inside the second tube 18. The positioning rod 66 is perpendicular to the second tube 18 and does not affect the flow of the refrigerant. A rotating rod 67 is connected to the positioning rod 66. The diameter of the rotating rod 67 is smaller than the diameter of the second tube 18. The rotating rod 67 is rotatably connected to the tube cover 20. A first valve body 68 is connected to the pipe cover 20. A rotating rod 67 extends into the first valve body 68. A third connecting rod 69 is connected to the rotating rod 67. A fourth connecting rod 70 is hinged to the free end of the third connecting rod 69. A piston rod 71 is hinged to the free end of the fourth connecting rod 70. A cylinder 72 is slidably connected to the piston rod 71. The cylinder 72 is connected to the first valve body 68 and has air intake and exhaust ports. A pipe 73 for supplying air to the cylinder 72 is installed on the cover plate 7. The rotating rod 67 swings at a certain angle due to the extension and retraction of the piston rod 71. Movement Process: Unlike Embodiment 1, the rightmost second tube 18 is connected to the bushing 65 and the three-way pipe 19 via a ball bearing 64. The positioning rod 66 and the rotating rod 67 are located inside the second tube 18. When the pipe 73 on the cover plate 7 supplies gas to the cylinder 72, the piston rod 71 extends and retracts, driving the fourth connecting rod 70 and the third connecting rod 69, causing the rotating rod 67 to swing at a certain angle, thereby driving the three-way pipe 19 and the nozzle 23 to swing and spray. Beneficial Effects: The swinging spray of the nozzle 23 solves the problem of concentrated fixed-point spraying, making the spray range of the refrigerant wider and the distribution more uniform, further improving the freezing effect of the film.

[0064] like Figure 28As shown, in Embodiment 3, unlike Embodiment 1, considering that the aforementioned block 25 requires opening the end cap 2 for operation, a second valve body 74 is installed on the rear pipe cap 20. A guide pipe 75 is slidably connected to the second valve body 74, and the free end of the guide pipe 75 is located inside the three-way pipe 19. The side wall of the guide pipe 75 has a liquid port connecting to the three-way pipe 19. The second valve body 74 has a third worm gear 76, and a first sector gear 77 meshes on the third worm gear 76. An incomplete gear 78 is connected to the gear 77. The side wall of the guide tube 75 has toothed grooves that mesh with the incomplete gear 78, providing a self-locking function. A third valve body 79 is mounted on the second valve body 74. A push rod 80 is slidably connected to the third valve body 79. A return spring 81 is connected between the push rod 80 and the third valve body 79 with a gap. The push rod 80 is connected to the guide tube 75 via a needle rod 82. The third valve body 79 has an interface for pushing the push rod 80. Movement: The second valve body 74 on the rear tube cover 20 drives the guide tube 75 to slide through the meshing of the third worm gear 76 with the first sector gear 77 and the incomplete gear 78. When the push rod 80 is pushed, the needle rod 82 moves the guide tube 75, connecting the liquid port to the three-way pipe 19, allowing the refrigerant to flow or be sealed without opening the end cover 2. Beneficial effects: This structure enables automatic control of the block 25, avoids the cumbersome operation of opening the end cover 2, improves the convenience of equipment maintenance and work efficiency, and the self-locking effect of the incomplete gear 78 ensures the stability of the structure.

[0065] like Figure 29 As shown in Example 4, unlike Example 1, considering that the first nozzle 35 can spray a conical refrigerant, the nozzle 23 is rotatably connected to the third pipe opening. Four branch nozzles 83 are connected to the third pipe opening at equal angles. A second nozzle 84 is installed on each branch nozzle 83, and the second nozzle 84 can spray a spiral-shaped refrigerant. Movement process: The nozzle 23 is rotatably connected to the third pipe opening, the four branch nozzles 83 are arranged at equal angles, and the second nozzle 84 sprays a spiral-shaped refrigerant. Compared to conical spraying, spiral spraying makes the refrigerant coverage on the film surface more uniform and the contact more thorough. Beneficial effects: Spiral spraying increases the contact area and time between the refrigerant and the film, improving freezing efficiency and effect, and meeting the needs of higher quality film production.

[0066] like Figure 30 and Figure 31As shown in Example 5, unlike Example 1, considering that the discharge of gaseous refrigerant from the containment cavity is mixed with the discharge of liquid refrigerant, which is not conducive to the circulation of refrigerant, a blocking plate 85 is connected to the first tube 6 on the right side. A ninth tube 86 is connected to the blocking plate 85. The length of the ninth tube 86 is greater than the length of the hollow tube 5. Two liquid outlet pipes 87 are connected to the ninth tube 86 located in the containment cavity. The two liquid outlet pipes 87 face the inner bottom surface of the drum 1. The lower end of the liquid outlet pipe 87 is connected to an arched passage. The filter head 88 has filter holes distributed on its surface to prevent solid refrigerant from clogging the liquid outlet pipe 87. Two vent pipes 89 are connected to the ninth tube 86 located in the receiving cavity, both facing the inner top surface of the drum 1. A liquid-proof cap 90 is connected to the end of the liquid outlet pipe 87, and an air inlet is opened on the side wall of the liquid outlet pipe 87, located below the liquid-proof cap 90. A baffle 91 is connected inside the ninth tube 86, dividing the ninth tube 86 into liquid delivery channels and air delivery channels. During operation: The first tube 6 on the right side is connected to the blocking plate 85, and the baffle 91 inside the ninth tube 86 divides it into liquid delivery channels and air delivery channels. The liquid outlet pipe 87 faces the inner bottom surface of the drum 1, the arched filter head 88 prevents solid refrigerant from clogging, and the vent pipes 89 face the inner top surface. The drive motor 99 drives the rotating plate 97 to rotate, and the eccentrically positioned drive rod 96 causes the ninth tube 86 to swing back and forth, preventing the filter head from clogging. Beneficial effects: The gas-liquid separation discharge structure avoids the adverse effects of mixed gaseous and liquid refrigerant discharge on the circulation; the filter head and swing mechanism effectively prevent solid refrigerant clogging, ensuring smooth refrigerant discharge and improving the reliability and stability of the equipment.

[0067] like Figure 32As shown, as an optimization of Embodiment 5, considering that the solid refrigerant will move towards the filter head, the ninth tube 86 is rotatably connected to the blocking plate 85; a third gear 92 is connected to the ninth tube 86 located outside the hollow tube 5, a second sector gear 93 meshes with the third gear 92, a fourth bearing seat 94 is rotatably connected to the second sector gear 93, the fourth bearing seat 94 is located on the frame, a guide rail 95 is connected to the second sector gear 93, a drive rod 96 is slidably connected to the guide rail 95, a rotating plate 97 is connected to the drive rod 96, a fifth bearing seat 98 is connected to the rotating plate 97, the fifth bearing seat 98 is located on the frame, the rotating plate 97 is driven by the drive motor 99, the drive rod 96 is located at the eccentric position of the rotating plate 97, the drive rod 96 drives the ninth tube 86 to reciprocate, preventing the solid refrigerant from clogging the filter head. Movement Process: As the solid refrigerant moves towards the filter head, the drive motor 99 rotates the rotating plate 97, and the drive rod 96 slides on the guide rail 95, causing the ninth tube 86 to oscillate back and forth, breaking up the accumulation of solid refrigerant at the filter head. Beneficial Effects: The reciprocating oscillation of the ninth tube 86 effectively prevents the solid refrigerant from clogging the filter head, ensuring the normal operation of the liquid outlet pipe 87 and the gas outlet pipe 89, and improving the operating efficiency and stability of the equipment.

[0068] like Figure 33As shown, a system using an industrial refrigeration drum 1 with CO2 as the refrigerant is further proposed. This system consists of a CO2 refrigeration circuit and a high-temperature working fluid heat dissipation circuit coupled through a condenser-evaporator. In the CO2 refrigeration circuit, a CO2 receiver stores liquid CO2, which is pressurized by a CO2 pump, purified by a drying filter, and then sent to the CO2 evaporator. Here, the liquid CO2 evaporates and absorbs heat (e.g., to cool the refrigerant in the refrigeration drum 1). It then enters the condenser-evaporator to exchange heat with the high-temperature working fluid on the right side, condenses into a liquid state, and flows back to the receiver, completing the refrigerant cycle. In the high-temperature working fluid heat dissipation circuit, the gaseous working fluid is compressed by a compressor, removed by an oil separator, and then enters the condenser to condense into a liquid state. It then evaporates and absorbs heat again in the condenser-evaporator. The generated gaseous working fluid is separated by a gas-liquid separator and returned to the compressor, thus transferring heat to the outside. During operation, the refrigeration side (CO2 loop) provides a low-temperature refrigerant of -20℃ to -50℃ to equipment such as the refrigeration drum 1 through a process of "pump → filter → evaporation → condensation" to meet the cooling requirements of processes such as adhesive freezing. The heat dissipation side (high-temperature working fluid loop) transfers heat from the refrigeration side to the outside through a process of "compression → condensation → evaporation" to ensure the system's energy balance. This system utilizes the low boiling point of CO2 to adapt to low-temperature conditions. The dual-loop design enhances heat exchange through a condenser-evaporator, significantly improving refrigeration efficiency (COP of 2.5~3.0, 15%~20% higher than a single loop), environmental friendliness (no ODP, low GWP), and adaptability to operating conditions (temperature control accuracy of the outer wall of drum 1 is ±0.5℃). Furthermore, its compact structure reduces energy consumption. It can be directly applied to the refrigerant circulation of the aforementioned refrigeration drum 1. Combined with the internal injection mechanism 9 and L-shaped drain pipe 8 of the drum 1, it can achieve efficient refrigerant circulation and uniform temperature control, solve the problems of refrigerant retention and uneven temperature in the traditional drum 1, provide technical support for the industrial production of high-end film, and promote the green and efficient development of refrigeration equipment.

[0069] Although the present invention has been described in detail with reference to the foregoing examples, those skilled in the art can still make and modify the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An industrial refrigeration drum using CO2 as a refrigerant, characterized in that, include: A tubular drum (1) has end caps (2) fixed at both ends by bolts to form a refrigerant receiving cavity. The outer wall of the drum (1) is used to freeze the adhesive liquid and stably output the adhesive film. A T-shaped shaft tube (3) is installed in the central shaft hole of the end cap (2). The large-diameter port of the shaft tube (3) is rotatably connected to the hollow tube (5) through a sealed bearing (4). The length of the hollow tube (5) is greater than that of the shaft tube (3). The hollow tube (5) inside the cavity is connected to the first tube body (6) through a flange. The free end of the first tube body (6) on the left is provided with a cover plate (7), and the free end of the first tube body (6) on the right is connected to an L-shaped drain pipe (8), with its lower end facing the inner bottom surface of the drum (1). A spray mechanism (9) is provided between the two first tubes (6) for spraying out the refrigerant; the spray mechanism (9) includes a fan-shaped first tank (15) and a second tank (16), the first tank (15) and the second tank (16) are located on the upper side of the first tube (6), and the two are connected by a through hole communicating with the first tube (6), and a reinforcing rib (17) is provided at the angle between them and the first tube (6); the outer sides of the first tank (15) and the second tank (16) are provided with second tubes (18) arranged at equal angles, the free ends of which are connected to a three-way pipe (19), the outer port of the three-way pipe (19) is provided with a pipe cap (20), and a third tube (21) is installed between the opposite three-way pipes (19), the third tube (21) is provided with a fourth tube (22) at equal intervals and Nozzle (23); Rear pipe cover (20) is connected to block (25) via screw (24), the outer end of screw (24) is provided with screw head (26) to control the opening and closing of block (25); The lower end of the second pipe body (18) is connected to the fifth pipe body (27) facing the first pipe body (6) to transport the lower layer of liquid refrigerant; The top surface of the first storage tank (15) is provided with gas-liquid separation pipe (28), the lower end of which is connected to horizontal S-shaped pipe (30) via U-shaped pipe (29), the first section of the S-shaped pipe (30) has a circular arc opening for liquid; The gas-liquid separation pipe (28) is connected to branch pipe (31), and is connected to the sixth pipe body (33) and the equally spaced seventh pipe body (34) via hose (32), the seventh pipe body (34) is connected to nozzle (23) to mix gas-liquid refrigerant.

2. The industrial refrigeration drum using CO2 as a refrigerant according to claim 1, characterized in that, The drum (1) has an annular groove (10) on the outer side of both ports to prevent adhesive from adhering to the side of the ports, and a limiting groove (11) with bolt holes on the inner side for installing the end cap (2).

3. The industrial refrigeration drum using CO2 as a refrigerant according to claim 1, characterized in that, The small diameter end of the shaft tube (3) is fixed to the end cap (2) by a positioning nut (14), and the sealed bearing (4) is installed in the bearing mounting port of the large diameter end of the shaft tube (3).

4. The industrial refrigeration drum using CO2 as a refrigerant according to claim 1, characterized in that, The nozzle (23) is provided with a three-way flow channel, with the first vertical pipe opening connected to the fourth pipe body (22), the second horizontal pipe opening connected to the seventh pipe body (34), and the third pipe opening equipped with the first nozzle (35) to mix and spray out the coolant.

5. The industrial refrigeration drum using CO2 as a refrigerant according to claim 1, characterized in that, Two shaft tubes (3) are connected to a first machine base (37) through a first bearing seat (36). One side of the shaft tube (3) is provided with a first gear (38) and meshes with a second gear (39). The second gear (39) is driven by a first motor (40) with a second machine base (41).

6. The industrial refrigeration drum using CO2 as a refrigerant according to claim 1, characterized in that, The supporting material tank (42) is equipped with an L-shaped eighth pipe (43), a valve (44) is installed on the outer section of the tank, and an air bag (45) is installed on the inner section of the tank to regulate the liquid level.

7. The industrial refrigeration drum using CO2 as a refrigerant according to claim 6, characterized in that, The material pool (42) is supported by a lifting platform, which includes: a base plate (46) and a slide rod (47), the slide rod (47) being slidably connected to a guide tube (48) and a top plate (49); a support rod (50) being connected to a lead screw (51) and a first worm wheel (52), the first worm wheel (52) meshing with a first worm (55); the inner clamping plate (57) of the sliding groove (56) of the top plate (49) is connected to a second worm wheel (61) through a first connecting rod (58), a second connecting rod (59) and a rotating shaft (60), the second worm wheel (61) meshing with a second worm (62), the second worm (62) being connected to a round tube (53) through a third bearing seat (63).

8. A system for an industrial refrigeration drum using CO2 as a refrigerant as described in any one of claims 1-7, characterized in that, The system consists of a CO2 refrigeration circuit and a high-temperature working fluid heat dissipation circuit coupled through a condenser-evaporator. In the CO2 refrigeration circuit, a CO2 receiver stores liquid CO2, which is pressurized by a CO2 pump, purified by a dryer filter, and then sent to the CO2 evaporator. The liquid CO2 evaporates and absorbs heat here, and then enters the condenser-evaporator to exchange heat with the high-temperature working fluid on the right side. It condenses into liquid and flows back to the receiver, completing the refrigerant cycle. In the high-temperature working fluid heat dissipation circuit, the gaseous working fluid is compressed by a compressor, removed by an oil separator, and then enters the condenser to condense into liquid. It then evaporates and absorbs heat in the condenser-evaporator. The resulting gaseous working fluid is separated by a gas-liquid separator and returned to the compressor, realizing the transfer of heat to the outside.

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