Preparation method and equipment of nano-modified bidirectional induction far infrared polyester filament yarn

Abstract

The invention is suitable for the technical field of polyester filament yarn preparation, and provides a preparation method and equipment of nano-modified bidirectional induction far infrared polyester filament yarn, and the preparation method comprises the following steps: T1, far infrared nano material modification, T2, master batch preparation, T3, spinning and T4, post-treatment, in the preparation step, zirconium carbide, titanium dioxide or zinc oxide nano particles are selected, a silane coupling agent is used for surface modification, dispersity is improved, a temperature-sensitive phase change material or a photosensitive material is added, temperature / illumination bidirectional response is achieved, sunlight and an ultraviolet part in a fluorescent light source can be absorbed, the polyester filament does not change, and the service life of the polyester filament is prolonged; through cooperative use of all parts in the cooling device in the step T3, the spun yarns with different heights can be in direct contact with atomized water drops at the initial temperature for heat exchange, the utilization rate of water mist is increased, and the difference between the cooling effects inside and outside the spun yarns is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of polyester filament preparation, and more particularly to a preparation method and equipment for nano-modified bidirectional induction far-infrared polyester filament. Background Art

[0002] Polyester fiber is the fastest-growing, most productive, and most widely used synthetic fiber, currently the largest synthetic fiber variety. Polyester chips produced by polycondensation are melt-spun into polyester fiber, which exhibits high breaking strength and elastic modulus, moderate resilience, and excellent properties such as light, heat, and corrosion resistance.

[0003] However, since polyester is often exposed to the air during use, it requires certain antioxidant and UV resistance. However, most polyester filaments on the market do not have such properties, which causes polyester to corrode and break after long-term use.

[0004] In the melt spinning process, the chip particles are dried and dehumidified, heated and melted in a screw extruder to form a polymer melt, which is then metered by a melt metering pump and extruded from the spinneret holes of the spinning assembly; the melt stream extruded from the spinneret holes must undergo heat exchange with the flowing cooling medium in a cooling environment, so that it is cooled and solidified from the molten flow state to become a solid filament in the shortest possible time; the solidified filament is stretched, shaped, and wound (or cut) to become the final product; in the prior art, the cooling device combines the advantages of high cooling efficiency of water cooling and uniform cooling of the outer ring blowing device by applying water mist cooling technology to chemical fiber spinning cooling.

[0005] However, the flow direction of the water mist in the above cooling device is relatively single, the utilization rate of the water mist is not high, and there is a certain gap in the cooling effect inside and outside the spinning. Summary of the Invention

[0006] In view of the shortcomings of the existing technology, the purpose of the present invention is to provide a method and equipment for preparing nano-modified bidirectional sensing far-infrared polyester filament. By adding temperature-sensitive phase change materials or photosensitive materials, temperature / light bidirectional response is achieved, and the ultraviolet portion in sunlight and fluorescent light sources does not change itself, thereby improving the service life of the polyester filament; through the coordinated use of various components in the cooling device, spinning at different heights can directly contact and exchange heat with atomized water droplets at the initial temperature, thereby improving the utilization rate of water mist and reducing the gap in cooling effects inside and outside the spinning.

[0007] To achieve the above object, the present invention provides the following technical solutions: The preparation method of nano-modified bidirectional induction far-infrared polyester filament comprises the following steps: T1. Far-infrared nanomaterial modification Select zirconium carbide, titanium dioxide or zinc oxide nanoparticles, modify their surface with silane coupling agents to improve dispersibility, and add temperature-sensitive phase change materials or photosensitive materials to achieve temperature / light bidirectional response; T2. Masterbatch preparation The modified nanoparticles are melt-blended with polyester chips in a twin-screw extruder to produce a high-concentration masterbatch; T3, Spinning High-concentration masterbatch is mixed with pure polyester chips, melted through a screw extruder, and accurately transported to the composite spinning assembly by a metering pump. A special-shaped spinneret is used to increase the specific surface area and enhance the far-infrared radiation efficiency. The cooling device is used for cooling, multi-stage heat drawing, and relaxation heat setting to stabilize the lattice structure. T4, post-processing Graphene or carbon nanotube dispersion is coated by dipping, and conductivity is enhanced by rolling and drying to achieve dynamic thermal regulation.

[0008] The equipment used in the preparation method of nano-modified bidirectional induction far-infrared polyester filament includes the cooling device described in step T3; the cooling device includes a cooling rack, a heat exchange part fixed on the cooling rack, and a semiconductor temperature difference power generation part fixed on the side of the heat exchange part; the cooling rack includes a cold water tank; the cold water tank is evenly provided with installation ports; an exhaust fan is installed inside the installation port.

[0009] The present invention is further configured as follows: a support plate is symmetrically fixed on the top of the cold water tank; a U-shaped seat is fixed on the surface of one support plate; a rotating shaft is rotatably provided between the inner walls of the U-shaped seat; a lower driven pulley is rotatably provided on the surface of the other support plate; an upper driven pulley is provided above the support plate that is coaxial with the lower driven pulley; avoidance openings are provided on the surfaces of the lower driven pulley and the upper driven pulley; the heat exchange part includes a heat conducting plate; a rotating ring is fixed on the top and bottom of the heat conducting plate; an annular groove that cooperates with the rotating ring for rotation is provided on the top of the lower driven pulley and the bottom of the upper driven pulley; a limiting groove is provided on the inner wall of the annular groove; an annular rail that rotates with the limiting groove is fixed on the circumferential side of the rotating ring; a servo motor is fixedly installed on the top of the U-shaped seat; the output end of the servo motor is fixedly connected to the end of the rotating shaft.

[0010] The present invention is further configured as follows: two sets of coaxial driving pulleys are fixed from top to bottom on the circumferential side of the rotating shaft; corresponding belts are respectively provided for transmission between the lower driven pulley and the upper driven pulley and the corresponding driving pulley; an insulating conveyor belt is fixed between the two belts; a number of heat exchange aluminum coils are evenly fixed on the inner wall of the insulating conveyor belt; and an insulating strip is fixed between two adjacent heat exchange aluminum coils.

[0011] The present invention is further configured as follows: a curved cavity coaxial with the rotating ring is opened on one side of the heat conduction plate; an exhaust spiral tube and an exhaust spiral tube with opposite spiral directions are fixedly installed inside the curved cavity; both ends of the exhaust spiral tube and the exhaust spiral tube are sealed; a plurality of flow balancing tubes are connected to the peripheral sides of the exhaust spiral tube and the exhaust spiral tube; and an insulation layer is provided on the peripheral sides of the exhaust spiral tube and the exhaust spiral tube.

[0012] The present invention is further configured as follows: the bottom ends of the exhaust spiral tube and the exhaust spiral tube are respectively connected with an exhaust pipe and an air supply pipe; the exhaust pipe is connected to an external negative pressure pump; the air supply pipe is connected to an external atomizing mechanism; the external atomizing mechanism is connected to a cold water tank through a water pump; a spiral heat exchange tube adapted to the exhaust spiral tube is provided inside the exhaust spiral tube; connecting pipes are provided at both ends of the spiral heat exchange tube; a refrigerator is connected between the two connecting pipes; the spiral heat exchange tube is used to transport refrigerant; and an L-shaped water outlet pipe is connected to the bottom end of the exhaust spiral tube.

[0013] The present invention is further configured as follows: the semiconductor temperature difference power generation unit includes a copper-clad ceramic plate, an N-type semiconductor element, a P-type semiconductor element, a hot surface 3D printed electrode, a hot surface ceramic plate and a power cord; the N-type semiconductor element and the P-type semiconductor element are arranged on the copper-clad ceramic plate; the hot surface 3D printed electrode is arranged on the N-type semiconductor element and the P-type semiconductor element; the hot surface ceramic plate is arranged on the hot surface 3D printed electrode, and the hot surface ceramic plate is connected to the power cord; a guide bar is provided on the copper-clad ceramic plate; a fixing frame is fixed on the hot surface ceramic plate; the fixing frame is fixedly installed on the side of the heat conducting plate; the bottom of the heat conducting plate is fixedly installed on the surface of the support plate by fastening bolts.

[0014] The present invention is further configured as follows: two spiral grooves with the same pitch and opposite rotation directions are opened on the circumferential side of the rotating shaft; the two ends of the spiral grooves are connected by an arc transition to form a closed motion trajectory; a heat-conducting aluminum plate is fixedly installed on the side of the copper-clad ceramic plate; a number of fin plates are evenly fixed on the side of the heat-conducting aluminum plate; a lifting part adapted to the spiral groove is slidably provided above the cold water tank; the lifting part includes a lifting plate; a sliding sleeve is fixed to one end of the lifting plate; a slider adapted to the spiral groove is fixed inside the sliding sleeve.

[0015] The swiveling scoop is configured to engage a plurality of locking plates at the bottom ends of the sled and to engage with the locking scoops, wherein the locking scoops are configured to engage with the locking scoops at the bottom ends of the sled and to engage with the locking scoops at the bottom ends of the sled.

[0016] The advantages of the present invention are: 1. The present invention selects zirconium carbide, titanium dioxide, or zinc oxide nanoparticles, performs surface modification with a silane coupling agent to improve dispersibility, and adds a temperature-sensitive phase change material or a photosensitive material to achieve a bidirectional temperature / light response. The nanoparticles can absorb the ultraviolet portion of sunlight and fluorescent light sources without changing themselves, thereby extending the service life of the polyester filament. A graphene or carbon nanotube dispersion is applied by an immersion method, and conductivity is enhanced through rolling and drying to achieve dynamic thermal regulation.

[0017] 2. The atomized small droplets of the present invention are blown toward the spinning through the equalizing flow tube on the exhaust spiral tube to form steam. The atomized water droplets absorb heat and vaporize after contacting the spinning, and the steam is promptly extracted by the exhaust spiral tube to avoid saturated steam reducing the heat exchange efficiency, so that the spinning at different heights can directly contact the atomized water droplets at the initial temperature for heat exchange, thereby improving the cooling efficiency and effect of the spinning. At the same time, the flow trajectory of the water mist is changed, the fluidity of the water mist at various positions of the spinning is improved, the utilization rate of the water mist is improved, and the gap in the cooling effect inside and outside the spinning is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The present invention is a flowchart of the steps of the preparation method of the nano-modified bidirectional induction far-infrared polyester filament.

[0019] Figure 2 It is a schematic structural diagram of the cooling device of the present invention.

[0020] Figure 3 For the present invention Figure 1 Schematic diagram of the structure from the front view angle.

[0021] Figure 4 It is a structural schematic diagram of the cooling rack of the present invention.

[0022] Figure 5 For the present invention Figure 4 Schematic diagram of the structure from the front view angle.

[0023] Figure 6 It is a structural schematic diagram of the heat exchange part of the present invention.

[0024] Figure 7 For the present invention Figure 6 Schematic diagram of the structure from the front view angle.

[0025] Figure 8 For the present invention Figure 7 A magnified view of area A.

[0026] Figure 9 It is a schematic structural diagram of the semiconductor thermoelectric power generation unit of the present invention.

[0027] Figure 10 For the present invention Figure 9 Schematic diagram of the structure from the front view angle.

[0028] Figure 11 It is a structural schematic diagram of the lifting part of the present invention.

[0029] In the figure: 1. Special-shaped spinneret; 2. Cooling device; 3. Cooling rack; 4. Heat exchange unit; 5. Semiconductor temperature difference power generation unit; 6. Cold water tank; 7. Mounting port; 8. Support plate; 9. U-shaped seat; 10. Rotating shaft; 11. Lower driven pulley; 12. Upper driven pulley; 13. Avoidance port; 14. Heat conduction plate; 15. Rotating ring; 16. Annular groove; 17. Servo motor; 18. Driving pulley; 19. Belt; 20. Insulated conveyor belt; 21. Insulation strip; 22. Curved cavity; 23. Exhaust spiral pipe; 24. Exhaust spiral pipe; 25. Flow equalizing pipe; 26. Exhaust pipe; 27. Gas pipe; 28. Spiral heat exchange pipe; 29 , connecting pipe; 30, copper-clad ceramic plate; 31, N-type semiconductor element; 32, P-type semiconductor element; 33, hot surface 3D printed electrode; 34, hot surface ceramic plate; 35, fixing frame; 36, spiral groove; 37, thermal conductive aluminum plate; 38, fin plate; 39, lifting part; 40, lifting plate; 41, sliding sleeve; 42, first accommodating box; 43, first wiping sponge; 44, ear rod; 45, second accommodating box; 46, second wiping sponge; 47, ear tube; 48, piston rod; 49, piston plate; 50, piston cylinder; 51, vertical pipe; 52, liquid collecting box; 53, extension pipe; 54, heat exchange aluminum coil; 55, L-shaped water outlet pipe. DETAILED DESCRIPTION

[0030] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0031] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0032] In the present invention, unless otherwise specified, directions such as "up" and "down" are generally used with respect to the directions shown in the drawings, or with respect to the vertical, perpendicular or gravity directions; similarly, for ease of understanding and description, "left" and "right" are generally used with respect to the left and right shown in the drawings; "inside" and "outside" refer to the inside and outside relative to the outline of each component itself, but the above-mentioned directions are not used to limit the present invention.

[0033] For example 1, please refer to Figure 1-11 , the present invention provides the following technical solutions: The preparation method of nano-modified bidirectional induction far-infrared polyester filament specifically comprises the following steps: T1. Far-infrared nanomaterial modification Zirconium carbide (ZrC), titanium dioxide (TiO2) or zinc oxide (ZnO) nanoparticles (particle size <50nm) are selected, and their surface is modified by a silane coupling agent (such as KH-550) to improve dispersibility. Thermosensitive phase change materials (such as paraffin microcapsules) or photosensitive materials (such as spiropyran derivatives) are added to achieve temperature / light bidirectional response.

[0034] T2. Masterbatch preparation The modified nanoparticles (3-8wt%) were melt-blended with polyester chips (intrinsic viscosity 0.65-0.85 dL / g) in a twin-screw extruder (temperature 250-280°C) to produce high-concentration masterbatch (nano content 20-30%).

[0035] T3, Spinning The masterbatch and pure polyester chips are mixed in a mass ratio of 1:5, melted through a screw extruder (temperature zone: 270-290℃), and accurately transported to the composite spinning assembly by a metering pump. A special-shaped spinneret 1 (cross-shaped or hollow structure) is used to increase the specific surface area and enhance the far-infrared radiation efficiency. The product is cooled by a cooling device 2, and multi-stage hot drawing (drawing ratio 3.5-4.5, temperature 80-120℃) and relaxation heat setting (temperature 130-150℃) are used to stabilize the lattice structure.

[0036] T4, post-processing The graphene or carbon nanotube dispersion (concentration 1-3%) is coated by dipping, and the conductivity is enhanced by rolling (pressure 2-4MPa) and drying (120℃) to achieve dynamic thermal regulation.

[0037] Working principle of this embodiment 1: Zirconium carbide, titanium dioxide or zinc oxide nanoparticles are selected and surface modified with silane coupling agents to improve dispersibility. Thermosensitive phase change materials or photosensitive materials are added to achieve two-way response to temperature / light. They can absorb the ultraviolet part of sunlight and fluorescent light sources without changing themselves, thereby increasing the service life of polyester filaments. Graphene or carbon nanotube dispersions are coated by dipping method, and conductivity is enhanced through rolling and drying to achieve dynamic thermal regulation.

[0038] By coordinating the various components in the cooling device 2 in step T3, spinning at different heights can directly contact and exchange heat with the atomized water droplets at the initial temperature, changing the flow trajectory of the water mist, improving the fluidity of the water mist at various positions of the spinning, improving the utilization rate of the water mist, and reducing the gap in cooling effects inside and outside the spinning.

[0039] For example 2, please refer to Figure 1-11 This second embodiment makes the following improvements on the basis of the first embodiment. Specifically, it relates to an apparatus used in a method for preparing nano-modified bidirectional induction far-infrared polyester filament, including the cooling device 2 in step T3; the cooling device 2 includes a cooling rack 3, a heat exchange portion 4 fixed on the cooling rack 3, and a semiconductor temperature difference power generation portion 5 fixed on the side of the heat exchange portion 4; the cooling rack 3 includes a cold water tank 6; the cold water tank 6 is evenly provided with installation ports 7; an exhaust fan is installed inside the installation port 7.

[0040] Support plates 8 are symmetrically fixed to the top of the cold water tank 6; a U-shaped seat 9 is fixed to the surface of one support plate 8; a rotating shaft 10 is rotatably provided between the inner walls of the U-shaped seat 9; a lower driven pulley 11 is rotatably provided on the surface of the other support plate 8; an upper driven pulley 12 is provided above the support plate 8 and is coaxial with the lower driven pulley 11; and an avoidance opening 13 is provided on the surfaces of the lower driven pulley 11 and the upper driven pulley 12.

[0041] The heat exchange part 4 includes a heat conducting plate 14; a rotating ring 15 is fixed to the top and bottom of the heat conducting plate 14; an annular groove 16 is provided on the top of the lower driven pulley 11 and the bottom of the upper driven pulley 12, which rotates with the rotating ring 15; a limiting groove is provided on the inner wall of the annular groove 16; an annular rail is fixed to the side surface of the rotating ring 15, which rotates with the limiting groove; a servo motor 17 is fixedly installed on the top of the U-shaped seat 9; the output end of the servo motor 17 is fixedly connected to the end of the rotating shaft 10.

[0042] Two sets of coaxial driving pulleys 18 are fixed from top to bottom on the side of the rotating shaft 10; corresponding belts 19 are provided between the lower driven pulley 11 and the upper driven pulley 12 and the corresponding driving pulley 18 respectively; an insulating conveyor belt 20 is fixed between the two belts 19; a number of heat exchange aluminum coils 54 are evenly fixed on the inner wall of the insulating conveyor belt 20; and an insulating strip 21 is fixed between two adjacent heat exchange aluminum coils 54.

[0043] Working principle of the second embodiment: By controlling and starting the servo motor 17, the rotating shaft 10 is driven to rotate slowly, thereby driving the driving pulley 18 to rotate slowly, and the corresponding belt 19 drives the driven pulley 11 and the upper driven pulley 12 to rotate slowly synchronously, thereby driving the heat-insulating conveyor belt 20 and the heat-exchanging aluminum coil 54 to transmit slowly synchronously, and the heat-exchanging aluminum coil 54 placed inside the curved cavity 22 exchanges heat with the heat inside the curved cavity 22. After the heat exchange, the heat-exchanging aluminum coil 54 is transmitted out of the curved cavity 22, realizing dynamic and continuous heat exchange, reducing the temperature inside the curved cavity 22, completing the first-level cooling of the spinning, and improving the cooling effect and efficiency of the spinning.

[0044] For example three, please refer to Figure 1-11 The third embodiment makes the following improvements on the basis of the second embodiment. Specifically, a curved cavity 22 coaxial with the rotating ring 15 is opened on one side of the heat conducting plate 14; an exhaust spiral pipe 23 and an exhaust spiral pipe 24 with opposite spiral directions are fixedly installed inside the curved cavity 22; both ends of the exhaust spiral pipe 23 and the exhaust spiral pipe 24 are sealed; a plurality of flow balancing pipes 25 are connected to the side surfaces of the exhaust spiral pipe 23 and the exhaust spiral pipe 24; and a heat insulation layer is provided on the outer side surfaces of the exhaust spiral pipe 23 and the exhaust spiral pipe 24.

[0045] The bottom ends of the exhaust spiral tube 23 and the exhaust spiral tube 24 are respectively connected to the exhaust pipe 26 and the air supply pipe 27; the exhaust pipe 26 is connected to the external negative pressure pump; the air supply pipe 27 is connected to the external atomization mechanism; the external atomization mechanism is connected to the cold water tank 6 through a water pump; a spiral heat exchange tube 28 adapted to it is provided inside the exhaust spiral tube 23; connecting pipes 29 are provided at both ends of the spiral heat exchange tube 28; a refrigerator is connected between the two connecting pipes 29; the spiral heat exchange tube 28 is used to transport refrigerant; the bottom end of the exhaust spiral tube 23 is connected to an L-shaped water outlet pipe 55.

[0046] Working principle of the third embodiment: By starting the water pump, the cold water in the cold water tank 6 is pumped to the external atomizing mechanism for atomization, and the atomized small water droplets are sent to the exhaust spiral tube 24 through the air supply pipe 27. The atomized small droplets are blown toward the spinning through the equalizing flow tube 25 on the exhaust spiral tube 24 to form steam. The negative pressure pump is started to extract most of the steam and water mist at the corresponding position through the equalizing flow tube 25 on the exhaust spiral tube 23, so that the spinning at different heights can directly contact and exchange heat with the atomized water droplets at the initial temperature. After contacting the spinning, the atomized water droplets absorb heat and vaporize, and the steam is promptly extracted by the exhaust spiral tube 23 to avoid saturated steam reducing the heat exchange efficiency; the cooling efficiency and effect of the spinning are improved, and at the same time, the flow trajectory of the water mist is changed, the fluidity of the water mist at various positions of the spinning is improved, the utilization rate of the water mist is improved, the gap in the cooling effect inside and outside the spinning is reduced, the secondary cooling of the spinning is completed, and the cooling effect and efficiency of the spinning are further improved.

[0047] The steam entering the exhaust spiral tube 23 exchanges heat with the refrigerant circulating in the spiral heat exchange tube 28 and is liquefied into water, which can be discharged through the L-shaped water outlet pipe 55.

[0048] For example 4, please refer to Figure 1-11 , this fourth embodiment makes the following improvements on the basis of the third embodiment. Specifically, the semiconductor thermoelectric power generation unit 5 includes a copper-clad ceramic plate 30, an N-type semiconductor element 31, a P-type semiconductor element 32, a hot surface 3D printed electrode 33, a hot surface ceramic plate 34 and a power line; the N-type semiconductor element 31 and the P-type semiconductor element 32 are arranged on the copper-clad ceramic plate 30; the hot surface 3D printed electrode 33 is arranged on the N-type semiconductor element 31 and the P-type semiconductor element 32; the hot surface ceramic plate 34 is arranged on the hot surface 3D printed electrode 33, and the hot surface ceramic plate 34 is connected to the power line; a guide strip is provided on the copper-clad ceramic plate 30; a fixing frame 35 is fixed on the hot surface ceramic plate 34; the fixing frame 35 is fixedly mounted on the side of the heat conducting plate 14; and the bottom of the heat conducting plate 14 is fixedly mounted on the surface of the support plate 8 by fastening bolts.

[0049] Two spiral grooves 36 with the same pitch and opposite rotation directions are opened on the side of the rotating shaft 10; the two ends of the spiral grooves 36 are connected by an arc transition to form a closed motion trajectory; a heat-conducting aluminum plate 37 is fixedly installed on the side of the copper-clad ceramic plate 30; and a number of fins 38 are evenly fixed on the side of the heat-conducting aluminum plate 37.

[0050] The heat-conducting aluminum plate 37 is in close contact with the copper-clad ceramic plate 30, and conducts the heat from the cold end to the fin plate 38 for heat dissipation.

[0051] A lifting part 39 adapted to the spiral groove 36 is slidingly provided above the cold water tank 6; the lifting part 39 includes a lifting plate 40; a sliding sleeve 41 is fixed to one end of the lifting plate 40; a slider adapted to the spiral groove 36 is fixed inside the sliding sleeve 41, and the slider is embedded in the spiral groove 36 and can slide freely.

[0052] A first accommodating box 42 is fixed to the other end of the lifting plate 40; a guide groove for slidingly cooperating with each wing plate 38 is opened on the side of the first accommodating box 42; a plurality of first wiping sponges 43 are inserted through the side of the first accommodating box 42; a plurality of ear rods 44 are fixed to the two opposite sides of the lifting plate 40; a second accommodating box 45 is fixed between the ends of the corresponding ear rods 44; a second wiping sponge 46 is inserted through the side of the second accommodating box 45.

[0053] Several ear tubes 47 are provided on the top of the first accommodating box 42 and the second accommodating box 45; a piston rod 48 is fixed to the bottom of the lifting plate 40; a piston plate 49 is fixed to the bottom of the piston rod 48; a piston cylinder 50 is fixed between the inner walls of the cold water tank 6 and slides with the piston plate 49; a liquid extraction pipe is provided at the bottom of the piston cylinder 50, and a liquid discharge pipe is provided on the peripheral side near its bottom; a one-way valve is provided on the liquid extraction pipe and the liquid discharge pipe; a vertical pipe 51 is fixed to the end of the liquid discharge pipe; a liquid collecting box 52 is fixed to the top of the vertical pipe 51; a number of extension pipes 53 are evenly connected to the top of the liquid collecting box 52; a hose is connected between the extension pipe 53 and the corresponding ear tube 47.

[0054] By arranging a one-way valve on the liquid extraction pipe, the cold water in the cold water tank 6 can only be drawn into the piston cylinder 50 through the liquid extraction pipe; by arranging a one-way valve on the liquid discharge pipe, the cold water inside the piston cylinder 50 can only be discharged through the liquid discharge pipe.

[0055] Working principle of the fourth embodiment: Each group of exhaust fans is controlled to start to blow away the heat inside the heat-insulating conveyor belt 20, thereby cooling the heat-exchange aluminum coil 54 placed inside the heat-insulating conveyor belt 20.

[0056] As the rotating shaft 10 rotates slowly, the slider inside the sliding sleeve 41 slides on the spiral groove 36, thereby driving the lifting part 39 to perform a reciprocating lifting motion. When the lifting part 39 slides up, the cold water inside the cold water tank 6 is pumped into the piston cylinder 50 through the liquid extraction pipe. When the lifting part 39 slides down, the cold water enters the first storage box 42 and the second storage box 45 in turn through the discharge pipe, the vertical pipe 51, the hose, and the ear tube 47 to replenish water for the first wiping sponge 43 and the second wiping sponge 46. During the reciprocating lifting motion of the lifting part 39, the first wiping sponge 43 and the second wiping sponge 46 are driven to wipe the fin plate 38 and the heat exchange aluminum coil 54 respectively, and the water is evaporated. The first wiping sponge 43 and the second wiping sponge 46 are kept moist by continuous water replenishment to ensure the evaporative cooling effect. In this process, the fin plate 38 and the heat exchange aluminum coil 54 are cooled due to evaporation heat absorption.

[0057] The heat dissipation of the heat-conducting aluminum plate 37 and the fin plate 38 realizes cooling of the copper-clad ceramic plate 30 (cold end), thereby improving the thermoelectric power generation efficiency of the semiconductor thermoelectric power generation unit 5. During the thermoelectric power generation process of the semiconductor thermoelectric power generation unit 5, the heat inside the curved cavity 22 is utilized to complete the three-stage cooling of the spinning, further improving the cooling effect and efficiency of the spinning. At the same time, the heat inside the curved cavity 22 is recycled and utilized, thereby improving the practicality of the cooling device 2.

[0058] Obviously, the embodiments described above are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0059] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, tasks, devices, components and / or combinations thereof.

[0060] It should be noted that the terms "first," "second," and the like in the specification and claims of this application and the accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein.

[0061] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

[0062] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiment. All technical solutions based on the concept of the present invention are within the scope of protection of the present invention. It should be noted that for those skilled in the art, various improvements and modifications that do not depart from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A method for preparing nano-modified bidirectional induction far-infrared polyester filament, characterized in that: The following steps are involved: T1. Far-infrared nanomaterial modification Select zirconium carbide, titanium dioxide or zinc oxide nanoparticles, modify their surface with silane coupling agents to improve dispersibility, and add temperature-sensitive phase change materials or photosensitive materials to achieve temperature / light bidirectional response; T2. Masterbatch preparation The modified nanoparticles are melt-blended with polyester chips in a twin-screw extruder to produce a high-concentration masterbatch; T3, Spinning The high-concentration masterbatch is mixed with pure polyester chips, melted by a screw extruder, and accurately transported to the composite spinning assembly by a metering pump. A special-shaped spinneret (1) is used to increase the specific surface area and enhance the far-infrared radiation efficiency. The product is cooled by a cooling device (2), multi-stage heat drawing, and relaxation heat setting to stabilize the lattice structure. T4, post-processing Graphene or carbon nanotube dispersion is coated by dipping, and conductivity is enhanced by rolling and drying to achieve dynamic thermal regulation.

2. The equipment used in the preparation method according to claim 1, characterized in that: The invention comprises the cooling device (2) in step T3; the cooling device (2) comprises a cooling rack (3), a heat exchange portion (4) fixed on the cooling rack (3), and a semiconductor temperature difference power generation portion (5) fixed on the side of the heat exchange portion (4); the cooling rack (3) comprises a cold water tank (6); the cold water tank (6) is evenly provided with mounting openings (7); an exhaust fan is installed inside the mounting opening (7).

3. The equipment used in the preparation method according to claim 2, characterized in that: A support plate (8) is symmetrically fixed on the top of the cold water tank (6); a U-shaped seat (9) is fixed on the surface of one of the support plates (8); a rotating shaft (10) is rotatably provided between the inner walls of the U-shaped seat (9); a lower driven pulley (11) is rotatably provided on the surface of the other support plate (8); an upper driven pulley (12) coaxial with the lower driven pulley (11) is provided above the support plate (8); and a clearance opening (13) is provided on the surfaces of the lower driven pulley (11) and the upper driven pulley (12); The heat exchange portion (4) includes a heat conducting plate (14); a rotating ring (15) is fixed to the top and bottom of the heat conducting plate (14); an annular groove (16) is provided on the top of the lower driven pulley (11) and the bottom of the upper driven pulley (12) for rotationally cooperating with the rotating ring (15); a limiting groove is provided on the inner wall of the annular groove (16); an annular rail is fixed to the circumferential side of the rotating ring (15) for rotationally cooperating with the limiting groove; a servo motor (17) is fixedly installed on the top of the U-shaped seat (9); and the output end of the servo motor (17) is fixedly connected to the end of the rotating shaft (10).

4. The equipment used in the preparation method according to claim 3, characterized in that: Two sets of coaxial driving pulleys (18) are fixed from top to bottom on the peripheral side of the rotating shaft (10); a matching belt (19) is provided between the lower driven pulley (11) and the upper driven pulley (12) and the corresponding driving pulley (18); a heat-insulating conveyor belt (20) is fixed between the two belts (19); a plurality of heat-exchanging aluminum coils (54) are evenly fixed on the inner wall of the heat-insulating conveyor belt (20); and a heat-insulating strip (21) is fixed between two adjacent heat-exchanging aluminum coils (54).

5. The equipment used in the preparation method according to claim 4, characterized in that: A curved cavity (22) coaxial with the rotating ring (15) is provided on one side of the heat conducting plate (14); an exhaust spiral tube (23) and an exhaust spiral tube (24) with opposite spiral directions are fixedly installed inside the curved cavity (22); both ends of the exhaust spiral tube (23) and the exhaust spiral tube (24) are sealed; a plurality of flow balancing tubes (25) are connected to the circumferential side surfaces of the exhaust spiral tube (23) and the exhaust spiral tube (24); and an insulating layer is provided on the circumferential side surfaces of the exhaust spiral tube (23) and the exhaust spiral tube (24).

6. The equipment used in the preparation method according to claim 5, characterized in that: The bottom ends of the exhaust spiral tube (23) and the exhaust spiral tube (24) are connected to an exhaust pipe (26) and an air supply pipe (27), respectively; the exhaust pipe (26) is connected to an external negative pressure pump; the air supply pipe (27) is connected to an external atomizing mechanism; the external atomizing mechanism is connected to a cold water tank (6) via a water pump; a spiral heat exchange tube (28) adapted thereto is provided inside the exhaust spiral tube (23); connecting tubes (29) are provided at both ends of the spiral heat exchange tube (28); a refrigerator is connected between the two connecting tubes (29); the spiral heat exchange tube (28) is used to transport refrigerant; the bottom end of the exhaust spiral tube (23) is connected to an L-shaped water outlet pipe (55).

7. The equipment used in the preparation method according to claim 6, characterized in that: The semiconductor temperature difference power generation unit (5) comprises a copper-clad ceramic plate (30), an N-type semiconductor element (31), a P-type semiconductor element (32), a hot surface 3D printed electrode (33), a hot surface ceramic plate (34) and a power line; the N-type semiconductor element (31) and the P-type semiconductor element (32) are arranged on the copper-clad ceramic plate (30); the hot surface 3D printed electrode (33) is arranged on the N-type semiconductor element (31) and the P-type semiconductor element (32); the hot surface ceramic plate (34) is arranged on the hot surface 3D printed electrode (33), and the hot surface ceramic plate (34) is connected to the power line; a guide bar is provided on the copper-clad ceramic plate (30); a fixing frame (35) is fixed on the hot surface ceramic plate (34); the fixing frame (35) is fixedly mounted on the side of the heat conducting plate (14); and the bottom of the heat conducting plate (14) is fixedly mounted on the surface of the support plate (8) by fastening bolts.

8. The equipment used in the preparation method according to claim 7, characterized in that: The rotating shaft (10) is provided with two spiral grooves (36) with the same pitch and opposite rotation directions; the two ends of the spiral grooves (36) are connected by a circular arc transition to form a closed motion trajectory; a heat-conducting aluminum plate (37) is fixedly mounted on the side of the copper-clad ceramic plate (30); a plurality of fin plates (38) are evenly fixed on the side of the heat-conducting aluminum plate (37); A lifting portion (39) adapted to the spiral groove (36) is slidably provided above the cold water tank (6); the lifting portion (39) includes a lifting plate (40); a sliding sleeve (41) is fixed to one end of the lifting plate (40); and a sliding block adapted to the spiral groove (36) is fixed inside the sliding sleeve (41).

9. The equipment used in the preparation method according to claim 8, characterized in that: A first accommodating box (42) is fixed to the other end of the lifting plate (40); a guide groove for slidingly cooperating with each wing plate (38) is provided on the side of the first accommodating box (42); a plurality of first wiping sponges (43) are inserted and provided through the side of the first accommodating box (42); a plurality of ear rods (44) are fixed to both opposite side surfaces of the lifting plate (40); a second accommodating box (45) is fixed between the ends of the corresponding ear rods (44); a second wiping sponge (46) is inserted and provided through the side of the second accommodating box (45); The tops of the first accommodating box (42) and the second accommodating box (45) are both provided with a plurality of ear tubes (47) extending therethrough; a piston rod (48) is fixed to the bottom of the lifting plate (40); a piston plate (49) is fixed to the bottom of the piston rod (48); a piston cylinder (50) is fixed between the inner walls of the cold water tank (6) and is slidably engaged with the piston plate (49); a liquid extraction pipe is provided at the bottom of the piston cylinder (50), and a liquid discharge pipe is provided on the peripheral side thereof near the bottom; a one-way valve is provided on both the liquid extraction pipe and the liquid discharge pipe; a vertical pipe (51) is fixed to the end of the liquid discharge pipe; a liquid collecting box (52) is fixed to the top of the vertical pipe (51); a plurality of extension pipes (53) are uniformly provided at the top of the liquid collecting box (52); a hose is connected between the extension pipe (53) and the corresponding ear tubes (47).

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