Industrial freezing rotary drum and system with CO2 as secondary refrigerant

Abstract

The invention relates to the technical field of freezing rotary drums, and discloses an industrial freezing rotary drum with CO2 as a secondary refrigerant and a system, the industrial freezing rotary drum comprises a tubular rotary drum, an end cover, a shaft tube, a hollow tube and an injection mechanism; the rotary drum and the end cover form a secondary refrigerant accommodating cavity, and the outer wall is used for freezing a glue solution and stably outputting a glue film; the first pipe bodies at the two ends of the hollow pipe are connected with the cover plate and the L-shaped drainage pipe correspondingly. The spraying mechanism comprises a first storage tank and a second storage tank, a secondary refrigerant is sprayed out through a second pipe body, a three-way pipe and a nozzle which are arranged at equal angles, and a gas-liquid separation pipe is matched with an S-shaped pipe and a fifth pipe body to achieve mixed atomization spraying of the liquid-state secondary refrigerant and the gas-state secondary refrigerant; the nozzle is provided with a three-way flow channel or a branch spray pipe to realize uniform or spiral spraying; the structure design is reasonable, the flowing path of a secondary refrigerant in the containing cavity is smooth, the spraying mechanism can evenly spray out the secondary refrigerant, the temperature of the outer wall of the rotary drum is even, and therefore frozen glue liquid is stabilized, and stable output of a glue film is guaranteed; and the arrangement of the liquid discharge pipe facilitates the discharge of the secondary refrigerant, so that the working efficiency of the equipment is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of refrigeration drums, and in particular to an industrialized refrigeration drum and system using CO2 as a coolant. Background Art

[0002] With the increasing demand for high-performance films in new energy, electronic information, healthcare, and other fields, such as lithium battery separators, optical protective films, and medical dressing substrates, stringent requirements are being placed on film thickness accuracy (error must be controlled within ±1%), surface flatness (roughness Ra ≤ 0.1μm), and physical stability in low-temperature environments. The freezing drum, a core forming component, directly determines the film's microstructure and macroscopic properties due to its outer wall temperature fluctuation (required to be ≤ ±0.5°C) and the uniformity of the refrigerant distribution. These factors are key to overcoming bottlenecks in high-end film production technology. Currently, existing freezing drums have several deficiencies in their use of coolant and structural design. For example, the coolant's flow path within the drum is not smooth, resulting in uneven temperature distribution on the drum's outer wall, which affects the freezing of the adhesive solution and, in turn, poor film output stability. Furthermore, the coolant injection mechanism is poorly designed, preventing uniform coolant discharge, further exacerbating the uneven drum outer wall temperature. Furthermore, the drainage structure is not conducive to the effective discharge of coolant, affecting equipment efficiency and increasing production costs. Therefore, there is an urgent need for a freezing drum with a reasonable structural design that can allow the coolant to flow smoothly and be sprayed evenly inside the drum, and facilitate the discharge of the coolant, so as to solve the problems existing in the existing technology and improve the quality and efficiency of film production. Summary of the Invention

[0003] The purpose of the present invention is to provide an industrial refrigeration drum and system using CO2 as a coolant to solve the problems raised in the above background technology.

[0004] The technical solution adopted by the present invention is as follows: An industrial refrigeration drum using CO2 as a refrigerant, comprising: a drum, the drum being a tubular structure, with end covers at both ends, the drum and the two end covers forming a refrigerant accommodating chamber, the outer wall of the drum being used to freeze the glue liquid and stably output the glue film; an axial hole being provided in the center of the end cover, an axial tube being installed in the axial hole, a sealed bearing being installed on the axial tube, a hollow tube being rotatably connected to the sealed bearing, the length of the hollow tube being greater than the length of the axial tube; the hollow tube located in the accommodating chamber is provided with a first tube body, the free end of the first tube body on the left is connected to a cover plate, and the free end of the first tube body on the right is connected to a drain pipe, the drain pipe being used to discharge the refrigerant from the accommodating chamber, the shape of the drain pipe is L-shaped, and the lower end port is facing the inner bottom surface of the drum; an injection mechanism is installed between the two first tube bodies, the injection mechanism being used to spray out the refrigerant.

[0005] The inner side surface of the end cover is provided with a spherical groove, and the spherical groove is provided with ribs arranged in a staggered manner.

[0006] A second valve body is installed on the tube cover on the rear side, and a conducting tube is slidably connected to the second valve body. The free end of the conducting tube is located in the three-way tube and a liquid port connected to the three-way tube is opened on the side wall; a third worm is provided on the second valve body, and a first sector gear is meshed on the third worm, and an incomplete gear is connected to the first sector gear, and a tooth groove is provided on the side wall of the conducting tube that meshes with the incomplete gear; a third valve body is installed on the second valve body, and 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 and the conducting tube are connected by a needle rod, and the third valve body is provided with an interface for pushing the push rod.

[0007] The nozzle is rotatably connected to the third pipe opening, and the third pipe opening is connected to four branch nozzles arranged at equal angles. The branch nozzles are equipped with a second nozzle for spraying spiral coolant.

[0008] The first tube body on the right side is connected to a blocking plate, and the blocking plate is connected to a ninth tube body, the length of the ninth tube body being greater than the length of the hollow tube; the ninth tube body located in the accommodating cavity is connected to two liquid outlet pipes facing the inner bottom surface of the drum, and the lower end of the liquid outlet pipe is connected to an arched filter head with filter holes distributed on the surface; the ninth tube body is also connected to two air outlet pipes facing the inner top surface of the drum, and the end of the liquid outlet pipe is connected to a liquid-proof cap, and an air inlet located below the liquid-proof cap is provided on its side wall; a partition is connected to the ninth tube body, dividing it into a liquid infusion channel and an air transmission channel.

[0009] The ninth tube body is rotatably connected to the blocking plate, and the ninth tube body located outside the hollow tube is connected to a third gear, and a second sector gear is meshed with the third gear, and the second sector gear is rotatably connected to a fourth bearing seat, and the fourth bearing seat is provided on the frame; the second sector gear is connected to a guide rail, and a drive rod is slidably connected to the guide rail, and the drive rod is connected to a rotating plate, and the rotating plate is connected to a fifth bearing seat, and the fifth bearing seat is provided on the frame, and the rotating plate is driven by a driving motor, and the driving rod is located at an eccentric position of the rotating plate.

[0010] The beneficial effects of this invention are as follows: It significantly improves the performance of the freezing drum through multi-dimensional structural optimization: The drum port ring groove prevents adhesive liquid adhesion. Combined with the spray mechanism's fan-shaped storage tank, gas-liquid mixed atomization, and oscillating / spiral nozzle, it achieves uniform distribution of the brine and efficient freezing, ensuring film quality. The T-shaped shaft tube, L-shaped drain pipe, and baffle gas-liquid flow channel ensure smooth brine circulation and separate and discharge gaseous and liquid media. A lifting platform adjusts the liquid level in the material tank, and the ninth tube filter head is linked to a oscillating mechanism to prevent solid blockage. The gear transmission and pneumatic drive enhance equipment stability. This comprehensive solution addresses issues such as film freezing uniformity, removal difficulty, and equipment reliability, significantly improving industrial production efficiency and film quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a schematic side cross-sectional structural diagram of the present application.

[0012] Figure 2 This is a schematic diagram of the main cross-sectional structure of this application.

[0013] Figure 3 Schematic diagram of the three-dimensional structure of the drum.

[0014] Figure 4 Schematic diagram of the three-dimensional structure of the end cover.

[0015] Figure 5 It is a schematic diagram of the side cross-sectional structure of the shaft tube.

[0016] Figure 6 It is a schematic diagram of the side cross-sectional structure of the injection mechanism.

[0017] Figure 7 This is a schematic diagram of the three-dimensional structure of the first storage tank.

[0018] Figure 8 This is a schematic diagram of the main cross-sectional structure of the first storage tank.

[0019] Figure 9 Schematic diagram of the three-dimensional structure of the nozzle.

[0020] Figure 10 It is a schematic diagram of the cross-sectional structure of the screw from top view.

[0021] Figure 11 It is a schematic diagram of the main cross-sectional structure of the gas-liquid separation tube.

[0022] Figure 12 It is a schematic diagram of the side cross-sectional structure of the gas-liquid separation tube.

[0023] Figure 13 Schematic diagram of the three-dimensional structure of the gas-liquid separation tube.

[0024] Figure 14 It is a schematic diagram of the main cross-sectional structure of the S-type tube.

[0025] Figure 15 Schematic diagram of the three-dimensional structure of the sixth tube body.

[0026] Figure 16 This is a schematic diagram of the main cross-sectional structure of the nozzle.

[0027] Figure 17 It is a side structural schematic diagram of the first bearing seat.

[0028] Figure 18 Schematic diagram of the three-dimensional structure of the material pool.

[0029] Figure 19 It is a schematic diagram of the main cross-sectional structure of the airbag.

[0030] Figure 20 Schematic diagram of the three-dimensional structure of the slider.

[0031] Figure 21 Schematic diagram of the three-dimensional structure of the catheter.

[0032] Figure 22 Schematic diagram of the three-dimensional structure of the first connecting rod.

[0033] Figure 23 Schematic diagram of the three-dimensional structure of the top plate.

[0034] Figure 24 Schematic diagram of the top cross-sectional structure of the rotating rod.

[0035] Figure 25 It is a schematic diagram of the three-dimensional structure of the first valve body.

[0036] Figure 26 It is a schematic diagram of the main cross-sectional structure of the piston rod.

[0037] Figure 27 A schematic diagram of the side cross-sectional structure of the pipeline.

[0038] Figure 28 Schematic diagram of the top cross-sectional structure of the push rod.

[0039] Figure 29 Schematic diagram of the three-dimensional structure of the branch nozzle.

[0040] Figure 30 It is a schematic diagram of the side cross-sectional structure of the liquid outlet pipe.

[0041] Figure 31 It is a schematic diagram of the side cross-sectional structure of the exhaust pipe.

[0042] Figure 32 Schematic diagram of the three-dimensional structure of the guide rail.

[0043] Figure 33 This is a flow chart of the refrigerant system.

[0044] In the figure: 1, drum; 2, end cover; 3, shaft tube; 4, sealed bearing; 5, hollow tube; 6, first tube body; 7, cover plate; 8, drain pipe; 9, injection mechanism; 10, ring groove; 11, limit 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, tee pipe; 20, tube cover; 21, third tube body; 22, fourth tube body; 23, nozzle; 24, screw; 25, block; 26, screw head; 27, Fifth tube; 28, gas-liquid separation tube; 29, U-shaped tube; 30, S-shaped tube; 31, branch tube; 32, hose; 33, sixth tube; 34, seventh tube; 35, first nozzle; 36, first bearing seat; 37, first machine base; 38, first gear; 39, second gear; 40, first motor; 41, second machine base; 42, material tank; 43, eighth tube; 44, valve; 45, airbag; 46, bottom plate; 47, slide rod; 48, guide tube; 49, top plate; 50, support rod; 51, lead screw; 52 , first worm gear; 53, round tube; 54, second bearing seat; 55, first worm; 56, slide; 57, splint; 58, first connecting rod; 59, second connecting rod; 60, rotating shaft; 61, second worm gear; 62, second worm; 63, third bearing seat; 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; 73, pipeline; 74, second valve body; 75, guide pipe; 76, third Worm; 77. First sector gear; 78. Incomplete gear; 79. Third valve body; 80. Push rod; 81. Return spring; 82. Needle rod; 83. Branch nozzle; 84. Second nozzle; 85. Blocking plate; 86. Ninth tube body; 87. Liquid outlet pipe; 88. Arched filter head; 89. Air outlet pipe; 90. Liquid-proof cap; 91. Partition; 92. Third gear; 93. Second sector gear; 94. Fourth bearing seat; 95. Guide rail; 96. Drive rod; 97. Turn plate; 98. Fifth bearing seat; 99. Drive motor. DETAILED DESCRIPTION

[0045] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. 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 understood as limiting the present invention.

[0046] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0047] In addition, the terms "first", "second", "third", "fourth", "fifth", "sixth", "seventh", "eighth", "ninth" and "tenth" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features.

[0048] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "install", "connect" and "connect" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0049] like Figure 1 and Figure 2 As shown in Example 1, an industrial refrigeration drum 1 with CO2 as a refrigerant includes a drum 1, which is a tubular structure; the two ends of the drum 1 are fixed with end covers 2 by bolts, and the drum 1 and the two end covers 2 form a refrigerant accommodating chamber, and the outer wall of the drum 1 is used to freeze the glue liquid and stably output the glue film; the center of the end cover 2 has an axial hole, and a shaft tube 3 is installed in the axial hole, and a sealing bearing 4 is installed on the shaft tube 3, and a hollow tube 5 is rotatably connected to the sealing bearing 4; the length of the hollow tube 5 is greater than the length of the shaft tube 3, and the hollow tube 5 located in the accommodating chamber is connected to the first tube body 6 through a flange, and the free end of the first tube body 6 on the left is connected to the cover plate 7; the free end of the first tube body 6 on the right is connected to a drain pipe 8, which is used to discharge the refrigerant in the accommodating chamber, and the shape of the drain pipe 8 is L-shaped, and the lower end of the drain pipe 8 faces the inner bottom surface of the drum 1; an injection mechanism 9 is installed between the two first tube bodies 6, and the injection mechanism 9 is used to spray out the refrigerant. The outlet end of the liquid discharge pipe 8 is connected to the compressor through a low-temperature resistant stainless steel pipe to extract the coolant in the drum 1.

[0050] Rotating drum 1 forms a coolant chamber through its end caps 2. A shaft tube 3 is mounted within the central axial hole of the end caps 2. A sealed bearing 4 rotatably connects the hollow tube 5 to the shaft tube 3. Coolant enters through one hollow tube 5, passes through the left first tube 6, and is ejected through the spray mechanism 9. After flowing through the chamber, it is discharged through a drain pipe 8 connected to the right first tube 6. The drain pipe 8 is L-shaped, with its lower end facing the inner bottom of the drum 1, ensuring efficient coolant discharge. As the drum 1 rotates, the outer wall of the drum 1 contacts the adhesive solution, freezing it and producing a stable film. Beneficial Effects: This structural design ensures a smooth coolant flow path within the chamber. The spray mechanism 9 evenly sprays coolant, maintaining a uniform temperature on the outer wall of the drum 1, thereby stabilizing the frozen adhesive solution and ensuring stable film production. The provision of the drain pipe 8 facilitates coolant discharge and improves the equipment's operating efficiency.

[0051] like Figure 3 As shown, as an optimization of Example 1, considering that the drum 1 is a circular tube 53, after the outer wall of the drum 1 is immersed in the glue, some glue will adhere to the side edges of the ports, making it difficult to remove. The drum 1 has an annular groove 10 on the outside of both ports. The annular groove 10 prevents glue from adhering to the side edges of the ports, facilitating the removal of the glue film. The inner sides of both ports of the drum 1 have retaining grooves 11 for mounting end caps 2, which have bolt holes for securing the end caps 2. The movement process: When the drum 1 is immersed in the glue, the glue will adhere to the outer wall of the drum 1. Due to the annular grooves 10 on the outer sides of the drum 1, the glue at the side edges of the ports is restricted by the structure of the annular grooves 10, making it difficult to adhere to the side edges of the ports. When the drum 1 rotates to remove the glue, the glue in the annular grooves 10 can also be more smoothly released, facilitating the removal of the glue film. When the end caps 2 are installed, they fit into the retaining grooves 11 on the inner sides of the drum 1 and are secured with bolts to ensure that the end caps 2 are accurately and securely installed. Beneficial Effects: The provision of 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 device.

[0052] like Figure 4 As shown, as an optimization of the first embodiment, the inner side surface of the end cover 2 has a spherical groove 12, and the spherical groove 12 has staggered ribs 13. Movement process: The spherical groove 12 on the inner side surface of the end cover 2 provides a more reasonable space for the flow of the coolant in the accommodating cavity, and the ribs 13 are staggered, which changes the flow path of the coolant, so that the coolant is fully in contact with and mixed with the inner side surface of the end cover 2 during the flow. Beneficial effect: The design of the spherical groove 12 and the ribs 13 increases the strength of the end cover 2, while optimizing the flow state of the coolant in the accommodating cavity, improving the distribution uniformity of the coolant, and thereby improving the freezing effect of the outer wall of the drum 1.

[0053] like Figure 5As shown, as an optimization of Example 1, the shaft tube 3 has a T-shaped tubular structure. The large-diameter end of the shaft tube 3 is provided with a bearing mounting opening for mounting a sealed bearing 4. A retaining nut 14 is threadedly connected to the small-diameter end of the shaft tube 3, securing the shaft tube 3 to the end cap 2. Movement Process: The shaft tube 3 has a T-shaped tubular structure. The large-diameter end of the shaft tube 3 is secured with a sealed bearing 4, allowing the hollow tube 5 to rotate about the shaft tube 3. The small-diameter end is secured to the end cap 2 via a retaining nut 14, ensuring a secure connection between the shaft tube 3 and the end cap 2. When the drum 1 rotates, the shaft tube 3 rotates with it. The hollow tube 5, driven by the sealed bearing 4, rotates relative to the shaft tube 3, enabling the input and output of brine. Beneficial Effects: The shaft tube 3 structure facilitates the installation and securing of the sealed bearing 4. The provision of the retaining nut 14 ensures a secure connection between the shaft tube 3 and the end cap 2, ensuring stable brine input and output during the rotation of the drum 1 and improving the operational stability of the equipment.

[0054] like Figures 6 to 10As shown, as an optimization of the first embodiment, the injection 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. The first storage tank 15 and the second storage tank 16 are located on the upper side of the first tube body 6. The first storage tank 15 and the second storage tank 16 have a through hole connected to the first tube body 6; the first storage tank 15 and the second storage tank 16 are connected to the first tube body 6 at an angle with a reinforcing rib 17; the outer side of the first storage tank 15 and the second storage tank 16 is installed with a second tube body 18, and a plurality of second tube bodies 18 are arranged at equal angles. The free end of the second tube body 18 is connected to A tee 19 is connected to a cap 20 at its outer end. A third tube 21 is installed in the gap opposite the tee 19. The third tube 21 has four equally spaced tubes 22, each equipped with a nozzle 23. A screw 24 is threaded onto the rear cap 20. A block 25 is mounted on the screw 24 inside the tee 19. This block 25 blocks the coolant from the second tank 16 from entering the third tube 21. A screw head 26 is mounted on the screw 24 outside the tee 19. By controlling the opening and closing of the block 25, reverse flushing of the spray mechanism 9 is achieved. The coolant flows from the first tube 6 into the first and second tanks 15 and 16, where it is evenly distributed to the two fan-shaped tanks through holes connected to the first tube 6. It then flows through the equally spaced second tube 18 to the tee 19, where it is ejected through the fourth tube 22 and nozzle 23 on the third tube 21. When reverse flushing is required, rotating the screw head 26 moves the block 25 on the screw 24, closing or opening the passage between the second storage tank 16 and the third tube 21, achieving reverse flushing. Beneficial Effects: The design of the spray mechanism 9 ensures uniform spraying of the brine. The fan-shaped storage tank and reinforcing ribs 17 enhance structural strength and uniform brine distribution. The reverse flushing function facilitates the removal of impurities or solid brine from the spray mechanism 9, ensuring effective spraying and extending the service life of the equipment.

[0055] like Figure 11 As shown, as an optimization of Example 1, the rightmost second tube 18 is shorter than the other second tubes 18. This rightmost second tube 18 is used to accelerate the freezing of the film. Movement Process: As the drum 1 rotates to freeze the film, the refrigerant sprayed from the shorter rightmost second tube 18, due to its closer proximity to a specific location on the film and a different flow distribution, can more quickly freeze the film at that location. Beneficial Effect: By shortening the length of the rightmost second tube 18, accelerated freezing of a specific area of ​​the film is achieved, improving the efficiency and uniformity of film freezing and meeting diverse production requirements.

[0056] like Figures 11 to 15As shown, as an optimization of the first embodiment, considering that there will be a part of the vaporized coolant in the upper layer of the first storage tank 15, the lower end of the second tube body 18 is connected to the fifth tube body 27, the fifth tube body 27 faces the first tube body 6, and the fifth tube body 27 is used to transport the liquid coolant in the lower layer; the top surface of the first storage tank 15 is installed with a gas-liquid separation tube 28, the lower end of the gas-liquid separation tube 28 extends into the lower layer of the first storage tank 15, the lower end of the gas-liquid separation tube 28 is connected with a U-shaped tube 29, the gas-liquid separation tube 28 is located in the arc-shaped portion of the U-shaped tube 29, and the upper end of the U-shaped tube 29 is installed with The S-shaped tube 30 is used to transport the upper layer of gaseous refrigerant. It is arranged horizontally, and its first arc section is provided with a liquid hole that allows the liquid refrigerant to flow back into the first storage tank 15. A branch tube 31 is connected to the gas-liquid separation tube 28 outside the first storage tank 15. This branch tube 31 is connected to a sixth tube body 33 via a hose 32. The sixth tube body 33 is connected to an evenly spaced seventh tube body 34, which is connected to the nozzle 23. The liquid refrigerant is mixed with the gaseous refrigerant and sprayed out, resulting in uniform atomization and effective freezing. The process: The gaseous refrigerant in the upper layer of the first storage tank 15 is discharged through the U-shaped tube 29 and S-shaped tube 30 at the lower end of the gas-liquid separation tube 28. The liquid hole in the S-shaped tube 30 allows the liquid refrigerant to flow back. The lower layer of liquid refrigerant is transported to the second tube body 18 through the fifth tube body 27. The gaseous coolant passes through the branch pipe 31, the hose 32, the sixth tube 33, and the seventh tube 34, and is mixed with the liquid coolant at the nozzle 23 before being sprayed out. Beneficial Effect: The gas-liquid separation and mixed spray structure allows the liquid and gaseous coolants to be fully mixed and atomized, resulting in uniform spraying. This improves the cooling effect of the coolant and avoids the shortcomings of single-state coolant spraying.

[0057] like Figure 16 As shown, as an optimization of embodiment one, the nozzle 23 has a three-way flow channel, and the nozzle 23 includes a first pipe opening, a second pipe opening, and a third pipe opening connected to the three-way flow channel. The first pipe opening is used to connect to the fourth tube body 22, and the first pipe opening is located in the vertical direction. The second pipe opening is used to connect to the seventh tube body 34, and the second pipe opening is located in the horizontal direction. The third pipe opening is equipped with a first nozzle 35. Movement process: the coolant of the fourth tube body 22 enters the nozzle 23 vertically from the first pipe opening, and the coolant of the seventh tube body 34 enters the nozzle 23 horizontally from the second pipe opening. After the two are mixed in the three-way flow channel, they are sprayed out from the first nozzle 35 of the third pipe opening. Beneficial effect: The structure of the nozzle 23 of the three-way flow channel enables the coolants from different sources to be fully mixed, realizes uniform spraying, and improves the freezing efficiency and effect.

[0058] like Figure 17As shown, as an optimization of Example 1, the two shaft tubes 3 are rotatably connected to a first bearing seat 36, the first bearing seat 36 is connected to a first machine base 37, a first gear 38 is installed on one side of the shaft tube 3, a second gear 39 is meshed with the first gear 38, the second gear 39 is driven by a first motor 40, and a second machine base 41 is installed on the first motor 40. Movement process: The first motor 40 drives the second gear 39 to rotate, which drives the shaft tube 3 on one side to rotate through the meshing first gear 38, thereby rotating the drum 1. The first bearing seat 36 and the first machine base 37 support the shaft tube 3 to ensure the stability of the rotation of the drum 1. Beneficial effect: The gear transmission mechanism provides stable power transmission, allowing the drum 1 to rotate at a uniform speed, ensuring the stability and consistency of the film freezing process.

[0059] like Figure 18 and Figure 19 As shown, as an optimization of Example 1, a material pool 42 is further included. The material pool 42 is used to store the glue liquid. An eighth tube body 43 is installed in the material pool 42. The eighth tube body 43 is L-shaped. A valve 44 is installed on the eighth tube body 43 located outside the material pool 42. An airbag 45 is installed on the second tube body 18 located inside the material pool 42. The airbag 45 is used to adjust the liquid level of the material pool 42. The eighth tube body 43 in the material pool 42 is used to control the inflow and outflow of the glue liquid, and the valve 44 adjusts the flow rate. The airbag 45 expands or contracts according to the changes in the glue liquid level, thereby adjusting the liquid level in the material pool 42.

[0060] like Figures 20 to 23As shown, as an optimization of the first embodiment, it also includes a lifting platform for carrying the material pool 42, the lifting platform includes a bottom plate 46, a matrix-arranged slide rod 47 is installed on the bottom plate 46, a guide tube 48 is slidably connected to the slide rod 47, the top surface of the guide tube 48 is connected to a top plate 49, and the top plate 49 is used to carry the material pool 42; a support rod 50 is installed in the gap between adjacent guide tubes 48, a screw 51 is rotatably connected to the support rod 50, a first worm gear 52 is threadedly connected to the screw 51, a round tube 53 is rotatably connected to the first worm gear 52, the round tube 53 is concentric with the screw 51, the lower end of the round tube 53 is connected to the bottom plate 46, and the side wall of the round tube 53 is provided with a second bearing seat 54 A first worm 55 is mounted on the second bearing seat 54, and the first worm 55 meshes with the first worm wheel 52. The top plate 49 has a slide groove 56, and two slide grooves 56 are arranged symmetrically. A clamping plate 57 is slidably connected in the slide groove 56, and the clamping plate 57 is used to clamp 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. The second worm wheel 61 meshes with a second worm 62. The second worm wheel 62 is mounted on the third bearing seat 63, and the third bearing seat 63 is connected to the round tube 53. Movement process: The slide rod 47 and the 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 by the screw 51 and the worm gear mechanism, thereby driving the material pool 42 to rise and fall. Beneficial effects: The liquid level regulating mechanism ensures the stability of the glue liquid level in the material pool 42, and the lifting platform enables the material pool 42 to adapt to the drum 1 at different heights, thereby improving the versatility and flexibility of the equipment.

[0061] like Figures 24 to 27As shown, embodiment 2 is different from embodiment 1 in that, considering that the above-mentioned nozzles 23 are all fixed-point injections, the injection points are relatively concentrated, a ball bearing 64 is connected to the second tube body 18 on the far right, a shaft sleeve 65 is connected to the ball bearing 64, the shaft sleeve 65 is connected to the tee pipe 19, a positioning rod 66 is connected to the second tube body 18, the positioning rod 66 is perpendicular to the second tube body 18, and does not affect the flow of the coolant, the positioning rod 66 is connected to a rotating rod 67, the diameter of the rotating rod 67 is smaller than the diameter of the second tube body 18, and the rotating rod 67 is rotatably connected to the tube cover 20, The pipe cover 20 is connected to a first valve body 68, 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 body 72 is slidably connected to the piston rod 71, the cylinder body 72 is connected to the first valve body 68, and the cylinder body 72 has intake and exhaust interfaces; a pipe 73 for supplying air to the cylinder body 72 is installed on the cover plate 7, and the rotating rod 67 swings at a certain angle through the telescopic movement of the piston rod 71. Movement Process: Unlike the first embodiment, the second tube body 18 on the far right connects the sleeve 65 and the tee 19 via a ball bearing 64. The positioning rod 66 and the rotating rod 67 are located within the second tube body 18. When the pipe 73 on the cover plate 7 supplies air to the cylinder 72, the piston rod 71 moves telescopically, 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 tee 19 and the nozzle 23 to swing and spray. Beneficial Effect: The swinging spraying of the nozzle 23 solves the problem of concentrated fixed injection points, allowing the coolant to be sprayed over a wider range and distributed more evenly, further improving the freezing effect of the film.

[0062] like Figure 28As shown, embodiment 3 is different from embodiment 1 in that, considering that the block 25 needs to open the end cover 2 for operation, a second valve body 74 is installed on the rear pipe cover 20, and a conducting pipe 75 is slidably connected to the second valve body 74. The free end of the conducting pipe 75 is located in the tee pipe 19, and the side wall of the conducting pipe 75 has a liquid port connected to the tee pipe 19; the second valve body 74 has a third worm 76, and the third worm 76 is meshed with a first sector gear 77, and the first sector gear A partially enclosed gear 78 is connected to the worm gear 77. The sidewall of the guide tube 75 has teeth that mesh with the partially enclosed gear 78, creating a self-locking effect. 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 interposed between the push rod 80 and the third valve body 79. A needle rod 82 connects the push rod 80 to the guide tube 75. The third valve body 79 has a port for pushing the push rod 80. The movement process: The second valve body 74 on the rear pipe cover 20, through the meshing of the third worm gear 76, the first sector gear 77, and the partially enclosed gear 78, drives the guide tube 75 to slide. When the push rod 80 is pushed, the needle rod 82 moves the guide tube 75, connecting the liquid port to the tee 19, enabling the flow or sealing of the brine. This operation can be performed without opening the end cover 2. Beneficial effects: This structure realizes the automatic control of the block 25, avoids the tedious operation of opening the end cover 2, improves the maintenance convenience and work efficiency of the equipment, and the self-locking effect of the incomplete gear 78 ensures the stability of the structure.

[0063] like Figure 29 As shown, Example 4 differs from Example 1 in that, given that the first nozzle 35 can spray a conical coolant, the nozzle 23 is rotatably connected to the third nozzle. The third nozzle is connected to four branch nozzles 83 arranged at equal angles. Each branch nozzle 83 is mounted with a second nozzle 84 capable of spraying a spiral coolant. Movement process: The nozzle 23 is rotatably connected to the third nozzle, with the four branch nozzles 83 arranged at equal angles. The second nozzle 84 sprays a spiral coolant. Compared to a conical spray pattern, the spiral spray pattern provides more uniform coverage and more complete contact of the coolant on the film surface. Beneficial Effect: The spiral spray pattern increases the contact area and duration between the coolant and the film, improving freezing efficiency and effectiveness, and meeting the requirements for higher-quality film production.

[0064] like Figure 30 and Figure 31As shown, embodiment 5 is different from embodiment 1 in that, considering that the discharge of the gaseous coolant in the accommodating chamber is mixed with the liquid coolant and discharged, which is not conducive to the circulation of the coolant, the first tube body 6 on the right is connected to a blocking plate 85, and the blocking plate 85 is connected to a ninth tube body 86. The length of the ninth tube body 86 is greater than the length of the hollow tube 5. The ninth tube body 86 located in the accommodating chamber is connected to a liquid outlet pipe 87. The number of the liquid outlet pipes 87 is 2, and 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 tube. The filter head 88 has filter holes distributed on its surface, preventing solid coolant from clogging the liquid outlet pipe 87. Two air outlet pipes 89 are connected to the ninth tube body 86 located in the receiving chamber, facing the inner top surface of the drum 1. The end of the liquid outlet pipe 87 is connected to a liquid-proof cap 90. An air inlet is provided on the sidewall of the liquid outlet pipe 87, located below the liquid-proof cap 90. A partition 91 is connected to the ninth tube body 86, separating the ninth tube body 86 into a liquid infusion channel and a gas delivery channel. Movement process: The partition 91 inside the ninth tube body 86 separates the liquid infusion channel and the gas delivery channel from the blocking plate 85 connected to the first tube body 6 on the right side. The liquid outlet pipe 87 faces the inner bottom surface of the drum 1. The arched filter head 88 prevents solid coolant from clogging it, and the air outlet pipe 89 faces the inner top surface. Drive motor 99 rotates rotating plate 97, while eccentrically positioned drive rod 96 reciprocates ninth tube 86, preventing filter plugging. Beneficial Effect: The gas-liquid separation and discharge structure avoids the adverse effects of mixed gaseous and liquid coolant discharge on circulation. The filter plug and swing mechanism effectively prevent solid coolant plugging, ensuring smooth coolant discharge and improving the reliability and stability of the device.

[0065] like Figure 32As shown, as an optimization of Example 5, considering that the solid coolant will move toward the filter head position, the ninth tube body 86 is rotatably connected to the blocking plate 85; the ninth tube body 86 located outside the hollow tube 5 is connected to the third gear 92, and the third gear 92 is meshed with a second sector gear 93, and the second sector gear 93 is rotatably connected to the fourth bearing seat 94, and the fourth bearing seat 94 is arranged on the frame, and the second sector gear 93 is connected to a guide rail 95, and the guide rail 95 is slidably connected to a drive rod 96, and the drive rod 96 is connected to a rotating plate 97, and the rotating plate 97 is connected to a fifth bearing seat 98, and the fifth bearing seat 98 is arranged on the frame, and the rotating plate 97 is driven by a driving motor 99, and the driving rod 96 is located at the eccentric position of the rotating plate 97, and the driving rod 96 drives the ninth tube body 86 to swing back and forth to prevent the solid coolant from clogging the filter head. Movement Process: When the solid coolant moves toward 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 swing back and forth, breaking up the accumulation of solid coolant at the filter head. Beneficial Effect: The reciprocating swing of the ninth tube 86 effectively prevents the solid coolant 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.

[0066] like Figure 33As shown, further, a system using an industrial refrigeration drum 1 with CO2 as a refrigerant is proposed, which is composed of a CO2 refrigeration circuit and a high-temperature working fluid heat dissipation circuit coupled through a condenser evaporator; in the CO2 refrigeration circuit, the CO2 liquid reservoir stores liquid CO2, which is pressurized by a CO2 pump and purified by a drying filter before being sent to the CO2 evaporator, where the liquid CO2 evaporates and absorbs heat (such as cooling the refrigerant of the refrigeration drum 1), and then enters the condenser evaporator to exchange heat with the high-temperature working fluid on the right, condenses into liquid and flows back to the liquid reservoir, completing the refrigerant cycle; in the high-temperature working fluid heat dissipation circuit, the gaseous working fluid is compressed by the compressor and deoiled by the oil separator, then enters the condenser and condenses into liquid, and then evaporates and absorbs heat in the condenser evaporator, and the generated gaseous working fluid is separated by the gas-liquid separator and returned to the compressor, realizing the transfer of heat to the outside. During operation, the refrigeration side (CO2 circuit) provides low-temperature refrigerant at -20°C to -50°C to equipment such as the refrigeration drum 1 through a "pump → filtration → evaporation → condensation" process, meeting the cooling requirements of processes such as the gelatin liquid freezing process. The heat dissipation side (high-temperature working fluid circuit) transfers heat from the refrigeration side to the outside world through a "compression → condensation → evaporation" process, ensuring system energy balance. This system utilizes CO2's low boiling point to adapt to low-temperature conditions. The dual-circuit design enhances heat exchange through the condenser evaporator, significantly improving refrigeration efficiency (COP of 2.5-3.0, a 15%-20% improvement over a single-circuit system), environmental friendliness (no ODP, low GWP), and operating adaptability (drum 1 outer wall temperature control accuracy of ±0.5°C), while also featuring a compact design and reducing energy consumption. It can be directly applied to the refrigerant circulation of the aforementioned freezing drum 1. Combined with the injection mechanism 9 and the L-shaped discharge pipe 8 in the drum 1, it can achieve efficient circulation of the refrigerant and uniform temperature control, solve the problems of refrigerant retention and temperature unevenness in the traditional drum 1, provide technical support for the industrial production of high-end films, and promote the green and efficient development of refrigeration equipment.

[0067] Although the present invention has been described in detail with reference to the foregoing examples, it is still possible for those skilled in the art to make modifications to the technical solutions described in the foregoing embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An industrial refrigeration drum using CO2 as a coolant, characterized in that: include: A tubular drum (1) has two ends fixed with end covers (2) by bolts to form a coolant receiving chamber, and the outer wall of the drum (1) is used to freeze the glue liquid and stably output the glue film; A T-shaped shaft tube (3) is installed in the central shaft hole of the end cover (2); the large-diameter end of the shaft tube (3) is rotatably connected to the hollow tube (5) through a sealing bearing (4); and the length of the hollow tube (5) is greater than that of the shaft tube (3); The hollow tube (5) in the accommodating cavity is connected to the first tube body (6) via a flange, a cover plate (7) is provided at the free end of the left first tube body (6), and an L-shaped liquid discharge pipe (8) is connected to the free end of the right first tube body (6), the lower end of which faces the inner bottom surface of the drum (1); An injection mechanism (9) is provided between the two first tube bodies (6) for injecting a coolant.

2. The industrial refrigeration drum using CO2 as a coolant according to claim 1, characterized in that: The outer sides of the two ends of the drum (1) are provided with annular grooves (10) to prevent the glue from adhering to the side edges of the ends, and the inner side is provided with a limiting groove (11) with a bolt hole for installing the end cover (2).

3. The industrial refrigeration drum using CO2 as a coolant according to claim 1, characterized in that: The small diameter end of the shaft tube (3) is fixed to the end cover (2) via a positioning nut (14), and the sealed bearing (4) is installed in the bearing installation opening of the large diameter end of the shaft tube (3).

4. The industrial refrigeration drum using CO2 as a coolant according to claim 1, characterized in that: The injection mechanism (9) comprises a fan-shaped first storage tank (15) and a second storage tank (16), which are connected via a through hole communicating with the first tube body (6), and a reinforcing rib (17) is provided at an angle with the first tube body (6); the outer side of the storage tank is provided with a second tube body (18) arranged at an equal angle, the free end of which is connected to a tee (19), the outer end of the tee (19) is provided with a tube cover (20), and a third tube body (21) is installed at the gap, and the third tube body (21) is provided with an equidistant fourth tube body (22) and a nozzle (23); the rear tube cover (20) is connected to the block (25) via a screw (24), and the outer end of the screw (24) is provided with a screw head (26) to control the opening and closing of the block (25).

5. The industrial refrigeration drum using CO2 as a coolant according to claim 4, characterized in that: The lower end of the second tube body (18) is connected to the fifth tube body (27) facing the first tube body (6) to transport the lower layer of liquid coolant; the top surface of the first storage tank (15) is provided with a gas-liquid separation tube (28), the lower end of which is connected to the horizontal S-shaped tube (30) through a U-shaped tube (29), and the first section of the S-shaped tube (30) has a liquid hole in the form of an arc; the gas-liquid separation tube (28) is externally connected to a branch tube (31), and is connected to the sixth tube body (33) and the seventh tube body (34) at equal intervals through a hose (32), and the seventh tube body (34) is communicated with the nozzle (23) to mix the gas-liquid coolant.

6. The industrial refrigeration drum using CO2 as a secondary refrigerant according to claim 5, characterized in that: The nozzle (23) is provided with a three-way flow channel, wherein the vertical first pipe opening is connected to the fourth pipe body (22), the horizontal second pipe opening is connected to the seventh pipe body (34), and the third pipe opening is provided with a first nozzle (35) for mixing and spraying the coolant.

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

8. The industrial refrigeration drum using CO2 as a coolant according to claim 1, characterized in that: An L-shaped eighth pipe body (43) is provided in the supporting material pool (42), a valve (44) is provided in the outer section of the pool, and an air bag (45) is provided in the inner section of the pool to adjust the liquid level.

9. The industrial refrigeration drum using CO2 as a secondary refrigerant according to claim 8, characterized in that: The material pool (42) is supported by a lifting platform, which includes: a bottom plate (46) and a sliding rod (47), wherein the sliding rod (47) is slidably connected to the guide tube (48) and the top plate (49); a support rod (50) is connected to the lead screw (51) and the first worm gear (52), wherein the worm gear engages with the first worm (55); a clamping plate (57) in the sliding groove (56) of the top plate (49) is connected to the second worm gear (61) through the first connecting rod (58), the second connecting rod (59) and the rotating shaft (60), wherein the worm gear engages with the second worm (62), and the worm is connected to the round tube (53) through the third bearing seat (63).

10. An industrial refrigeration drum system using CO2 as a secondary refrigerant according to any one of claims 1 to 9, 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, the CO2 liquid reservoir stores liquid CO2, which is pressurized by a CO2 pump and purified by a drying filter before being sent to the CO2 evaporator, where the liquid CO2 evaporates and absorbs heat, then enters the condenser evaporator for heat exchange with the high-temperature working fluid on the right, condenses into liquid and flows back to the reservoir, completing the refrigerant cycle; in the high-temperature working fluid heat dissipation circuit, the gaseous working fluid is compressed by the compressor and deoiled by the oil separator, then enters the condenser and condenses into liquid, then evaporates and absorbs heat in the condenser evaporator, and the generated gaseous working fluid is separated by the gas-liquid separator and returned to the compressor, realizing the transfer of heat to the outside.

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