High-efficiency electromagnetic heating roller

Abstract

A high-efficiency electromagnetic heating roller comprises a heating roller body, an outer shaft sleeve, shaft heads and air guide fan blades, the heating roller body is sleeved with the outer shaft sleeve, the outer shaft sleeve is rotationally connected with the heating roller body, the shaft heads are located at the two ends of the outer shaft sleeve respectively and fixedly connected with the outer shaft sleeve, and the air guide fan blades are located on one side of the outer shaft sleeve and fixedly connected with the shaft heads. The heating roller body generates a magnetic field and enables the outer shaft sleeve to generate a heat source through induction heating, and the air guide fan blades rotate along with the outer shaft sleeve and lower the temperature of the heating roller body. The electromagnetic coil is adopted, the outer shaft sleeve is promoted to efficiently convert heat energy under the condition of no direct contact, and the heating efficiency is remarkably improved. By arranging the multiple sections of heating areas, the temperatures of different temperature areas can be regulated and controlled respectively, the overall temperature balance of the outer shaft sleeve is guaranteed, and the service life of the roller body is further prolonged. And the air guide fan blades can drive air to flow by means of rotation of the outer shaft sleeve, the air cooling effect is achieved, the temperature of the heating roller body is effectively reduced, and the equipment operation stability is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of heating rollers, in particular to a high-efficiency electromagnetic heating roller. Background Art

[0002] Heating rollers are widely used in flattening and calendering in the fields of papermaking, dyeing, non-woven fabrics, printing, and paper. The common electric heating method is to set electric heating tubes on the circumference of the roller body, and transfer the heat generated by the electric heating tubes to the outer surface of the roller body through the heat transfer medium. This method has high electricity costs and limited life of the electric heating tubes, which makes the heating roller life short and the maintenance cost high; heating rollers heated by thermal oil are gradually being eliminated because of the pollution of the environment by thermal oil, temperature restrictions, and poor heat transfer uniformity, resulting in large surface temperature differences. Electromagnetic induction heating is the ideal choice at present.

[0003] In terms of improving production efficiency, electromagnetic induction heating has a fast heating speed and can quickly reach the working temperature, greatly shortening the equipment preheating time and reducing the waiting time in the production process. From the perspective of energy utilization, it is highly efficient and energy-saving, accurately converting electrical energy into thermal energy. Under the same production task, compared with traditional heating methods, it can significantly reduce energy consumption, reduce costs and meet energy-saving and environmental protection requirements, and help to evenly distribute the surface temperature of the heating roller and improve product quality.

[0004] However, the internal induction coil will generate a lot of heat during electromagnetic induction heating, and effective heat dissipation measures are needed to ensure the stable operation of the heating roller. If the heat cannot be dissipated in time, the coil temperature will be too high, which will cause damage to the insulation layer, deformation of the roller body, and decreased rolling dimensional accuracy, thereby affecting product quality. Utility Model Content

[0005] The purpose of the utility model is to provide a high-efficiency electromagnetic heating roller, which solves the above-mentioned problem of ensuring efficient production and having a heat dissipation structure to ensure stable operation of the device.

[0006] To achieve the above-mentioned purpose, the utility model provides a high-efficiency electromagnetic heating roller, comprising a heating roller body, an outer shaft sleeve, a shaft head and a fan blade, wherein the outer shaft sleeve is sleeved on the outside of the heating roller body and is rotatably connected to the heating roller body, the shaft heads are respectively located at both ends of the outer shaft sleeve and are fixedly connected to the outer shaft sleeve, the fan blade is located on one side of the outer shaft sleeve and is fixedly connected to the shaft head, the shaft head is provided with a vent, the heating roller body generates a magnetic field and causes the outer shaft sleeve to generate a heat source through induction heating, and the fan blade rotates with the outer shaft sleeve and reduces the temperature of the heating roller body;

[0007] The heating roller body comprises a hollow roller shaft, a coil frame and an electromagnetic coil, wherein the hollow roller shaft passes through the coil frame and is fixedly connected to the coil frame, the electromagnetic coil passes through the hollow roller shaft and surrounds the coil frame to form a heating zone, and the outer peripheral surface of the coil frame is provided with multiple heating zones;

[0008] The fan blade comprises a connecting portion and an air guiding portion fixedly connected to the connecting portion, the connecting portion is fixedly connected to the shaft head, and when the fan blade rotates, the air guiding portion guides airflow to flow toward the heating roller body.

[0009] Preferably, the coil frame includes an insulating coil, a profile frame, a support frame and a hollow ring plate, the hollow ring plate is fixed to both ends of the insulating coil, the profile frame is located at the center of the hollow ring plate, one end of the support frame is clamped with the profile frame, and the other end is fixedly connected to the hollow ring plate, and the support frame is provided with a plurality of strips;

[0010] The hollow roller passes through the center of the profile frame, the insulating coil is provided with a plurality of outlet holes, and the hollow roller is provided with outlet grooves corresponding to the outlet holes.

[0011] The electromagnetic coil passes through the wire outlet slot and the wire outlet hole and surrounds the insulating roll plate.

[0012] Preferably, the profile skeleton includes a skeleton body, a supporting outer ring and connecting bone strips. The supporting outer ring is sleeved on the outside of the skeleton body. One end of the connecting bone strip is connected to the inner wall of the supporting outer ring, and the other end is connected to the skeleton body. There are multiple connecting bone strips, and the support frame is clamped with the supporting outer ring.

[0013] Preferably, the outer wall surface of the supporting outer ring sleeve is provided with a plurality of embedded cavities.

[0014] An embedding protrusion is provided at one end of the support frame that is clamped with the support outer ring. The embedding protrusion is clamped with the embedding cavity, and a hollow is provided on the support frame.

[0015] Preferably, the air guide portion includes a flange and a first folded edge, one side of the flange is smoothly connected to the connecting portion, the flange and the connecting portion form an obtuse angle, the first folded edge is smoothly connected to one end of the flange and is vertically distributed to the connecting portion, the first folded edge is toward the other side of the flange away from the connecting portion, and the first folded edge and the flange form an obtuse angle.

[0016] Preferably, the other end of the flange is rounded.

[0017] Preferably, it further comprises a second folded edge, wherein the second folded edge is smoothly connected to the first folded edge, the second folded edge is bent toward the connecting portion, and the second folded edge forms an obtuse angle with the first folded edge.

[0018] Preferably, a side edge of the second folded edge close to the connecting portion and a side edge of the first folded edge close to the connecting portion are located on a plane extension line of the connecting portion, and a side edge of the second folded edge away from the connecting portion is rounded.

[0019] Beneficial effects of the utility model:

[0020] 1. The utility model generates a magnetic field by heating the roller body and heats the outer sleeve itself through induction heating. At the same time, the heated outer sleeve radiates heat to the heated roller body due to the high temperature, and realizes efficient heat energy conversion through eddy current heating, which significantly improves the heating efficiency. And through the setting of multiple heating zones, in applications in different temperature zones, the temperature of each zone can be adjusted separately to achieve precise temperature control, further ensure the overall temperature balance of the outer sleeve, reduce the thermal stress inside the roller body, effectively reduce the deformation and damage of the roller body caused by temperature difference, and thus extend the service life of the roller body. In addition, the device uses fan blades to enable the outer sleeve to drive air flow when rotating, achieve air cooling effect, effectively reduce the temperature of the heated roller body, further extend the service life of the roller body, and improve the stability of equipment operation.

[0021] 2. The fan blades of the utility model include a connecting part and an air guiding part. The multi-folded edge connection mode of the air guiding part can better withstand vibration and airflow impact force during the operation of the equipment, maintain a stable shape, and avoid affecting the airflow guiding effect. In addition, the design of multiple obtuse angles, combined with the characteristics that the first folded edge and the second folded edge are on the plane extension line of the connecting part, makes the part of the air guiding part close to the connecting part smaller than the part far away from the connecting part, thereby forming a trumpet-like structure. This structure allows the airflow to pass through the vents at a faster speed and reach the surface of the insulating roll plate, thereby quickly taking away the heat. Secondly, when the airflow of this structure flows from the outside to the inside, due to the smooth transition of multiple obtuse angles, it can also effectively avoid the generation of airflow vortices or turbulent areas in the airflow channel, which helps the equipment maintain good heat dissipation performance during operation, thereby ensuring the stable operation and service life of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below.

[0023] Figure 1 It is a structural schematic diagram of the utility model.

[0024] Figure 2 It is a structural schematic diagram of the heating roller body of the utility model.

[0025] Figure 3 It is a winding schematic diagram of the electromagnetic coil of the utility model.

[0026] Figure 4 yes Figure 2 Schematic diagram of the middle section.

[0027] Figure 5 It is a structural schematic diagram of the profile skeleton of the utility model.

[0028] Figure 6 yes Figure 4 Enlarged view of point A in the middle.

[0029] Figure 7 The utility model is a schematic diagram of the connection between the fan blade and the shaft head.

[0030] Figure 8 It is a structural schematic diagram of the fan blades of the utility model.

[0031] In the figure: a heating roller body 1; a hollow roller shaft 11; a coil frame 12; an insulating coil plate 121; a profile frame 122; a frame body 1221; a supporting outer ring 1222; an embedding cavity 1222a; a connecting bone bar 1223; a supporting frame 123; an embedding protrusion 1231; a hollow ring plate 124; an electromagnetic coil 13; an outer shaft sleeve 2; a shaft head 3; a fan blade 4; a connecting portion 41; a wind guiding portion 42; a flange 421; a first folded edge 422; and a second folded edge 423. DETAILED DESCRIPTION

[0032] Embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0033] like Figure 1As shown, a high-efficiency electromagnetic heating roller comprises a heating roller body 1, an outer sleeve 2, a shaft head 3 and a fan blade 4. The outer sleeve 2 is sleeved on the outside of the heating roller body 1 and is rotatably connected to the heating roller body 1. The shaft heads 3 are respectively located at both ends of the outer sleeve 2 and are fixedly connected to the outer sleeve 2. The fan blade 4 is located on one side of the outer sleeve 2 and is fixedly connected to the shaft head 3. The shaft head 3 is provided with a vent. The heating roller body 1 generates a magnetic field and generates a heat source for the outer sleeve 2 through induction heating. The fan blade 4 rotates with the outer sleeve 2 and reduces the temperature of the heating roller body 1. The utility model generates a magnetic field by the heating roller body 1, and the connection structure with the shaft head 3 and the outer sleeve 2 ensures that the outer sleeve 2 is heated and heated evenly during the rotation process, which not only avoids local overheating or underheating, but also improves the heating quality. In addition, the device uses the fan blade 4 to enable the outer sleeve 2 to drive air flow when rotating, and the air flows into the profile surface of the heating roller body 1 through the vent of the outer sleeve 2, quickly taking away the temperature, thereby achieving the purpose of continuous heat dissipation to avoid high-temperature damage to the induction coil. Moreover, one side of the device is provided with fan blades 4, but not on the other side. The side with fan blades 4 can increase the initial power of the airflow, making it easier for external cold air to be sucked in and guided to the surrounding of the heating roller body 1; the other side without fan blades 4 helps to maintain the internal air pressure balance, avoid the air pressure affecting the airflow circulation, and optimize the heat exchange process.

[0034] Specifically, Figure 2 , Figure 3 As shown, the heating roller body 1 includes a hollow roller shaft 11, a coil frame 12 and an electromagnetic coil 13. The hollow roller shaft 11 passes through the coil frame 12 and is fixedly connected to the coil frame 12. The electromagnetic coil 13 passes through the hollow roller shaft 11 and surrounds the coil frame 12 to form a heating zone. The outer peripheral surface of the coil frame 12 is provided with multiple heating zones; the fan blade 4 includes a connecting portion 41 and an air guide portion 42 fixedly connected to the connecting portion 41. The connecting portion 41 is fixedly connected to the shaft head 3. When the fan blade 4 rotates, the air guide portion 42 guides the air flow to the heating roller body 1. The utility model adopts the alternating magnetic field generated by the electromagnetic coil 13 to make the outer sleeve 2 generate an induced current without direct contact, and then generate heat through the turbine to achieve efficient heat energy conversion and significantly improve the heating efficiency. The setting of multiple heating zones enables the temperature of each zone to be adjusted separately in the application of different temperature zones, and realizes accurate temperature control, further ensures the overall temperature balance of the outer sleeve 2, reduces the thermal stress inside the roller body, and effectively reduces the deformation and damage of the roller body caused by the temperature difference, thereby extending the service life of the roller body. The dotted line portion in the figure represents the heating zone. The electromagnetic coil 13 of each heating zone is independently controlled, and the coil power of each heating zone can be adjusted according to demand, thereby achieving overall temperature control.

[0035] Furthermore, an electromagnetic coil 13 is wound on the surface of the coil frame 12, and a thermally conductive and insulating mica sheet and a high-permeability ferrite are installed between the electromagnetic coil 13 and the coil frame 12. The high-permeability ferrite is installed between the mica sheet and the coil frame 12. The high-permeability ferrite is clamped on the aluminum alloy profile of the coil frame 12 and can play a role in collecting the magnetic field, thereby reducing the influence of the aluminum alloy profile on the induction coil.

[0036] like Figure 4 As shown, the coil frame 12 includes an insulating coil plate 121, a profile frame 122, a support frame 123 and a hollow ring plate 124. The hollow ring plate 124 is fixed at both ends of the insulating coil plate 121. The profile frame 122 is located at the center of the hollow ring plate 124. One end of the support frame 123 is clamped with the profile frame 122, and the other end is fixedly connected to the hollow ring plate 124. The support frame 123 is provided with multiple; the hollow roller shaft 11 passes through the center of the profile frame 122, the insulating coil plate 121 is provided with multiple outlet holes, and the hollow roller shaft 11 is provided with outlet grooves corresponding to the outlet holes. The electromagnetic coil 13 passes through the outlet grooves and the outlet holes and surrounds the insulating coil plate 121. In this structure, the profile skeleton 122 and the support frame 123 cooperate with each other to achieve stable support and fixation of the insulating roll plate 121. Under this effect, the insulating roll plate 121 can be constructed into a regular shaft-shaped structure, which creates favorable conditions for the winding of the electromagnetic coil 13, and enables the electromagnetic coil 13 to be neatly and tightly wound on the insulating roll plate 121. The design of the outlet hole and the outlet groove enables the electromagnetic coil 13 to follow the predetermined path when passing through the hollow roller 11, effectively preventing the electromagnetic coil 13 from winding in disorder or colliding with other components during the passing process, thereby reducing the risk of equipment failure caused by wiring problems of the electromagnetic coil 13; and multiple outlet holes and outlet grooves can make it more convenient to wind the electromagnetic coil 13 in different areas to achieve more accurate temperature control requirements. The combined structure formed by the profile skeleton 122 and the support frame 123 is significantly flexible. When dealing with insulating roll plates 121 of different sizes, the profile skeleton 122 can maintain the original structure and only adjust the length of the support frame 123 to adapt. This structure not only simplifies the structural design process, but also avoids the need to redesign the profile frame 122 due to size differences of the insulating roll plate 121, thereby reducing related costs and saving time, and helping to improve production efficiency and product versatility.

[0037] Further, such as Figure 5As shown, the profile skeleton 122 includes a skeleton body 1221, a supporting outer ring 1222 and a connecting bone strip 1223. The supporting outer ring 1222 is sleeved outside the skeleton body 1221. One end of the connecting bone strip 1223 is connected to the inner wall of the supporting outer ring 1222, and the other end is connected to the skeleton body 1221. A plurality of connecting bone strips 1223 are arranged around the skeleton body 1221, and the support frame 123 is clamped with the supporting outer ring 1222. The utility model adopts a connection method between the skeleton body 1221 and the integrated hollow roller shaft 11, which can simplify the complex process in production. In the traditional production mode, the assembly of too many parts is prone to errors, and the integrated connection method effectively avoids this problem. In addition, it promotes closer cooperation between the components, thereby effectively reducing the difficulty of equipment production, improving production efficiency, and also plays a role in ensuring the reliability of the subsequent use of the equipment. Multiple connecting bone strips 1223 are evenly distributed, one end of which is connected to the inner wall of the supporting outer ring 1222, and the other end is connected to the skeleton body 1221, so as to build a stable support structure. This structure is like a force transmission network, dispersing the force exerted on the supporting outer ring 1222 to the skeleton body 1221. The numerous connecting bone bars 1223 work together to ensure that the supporting outer ring 1222 can maintain a stable shape and position under various working conditions, providing strong support for the safety and stability of the entire structure during operation. In addition, there are gaps between adjacent connecting bone bars 1223. When the fan blades 4 are running, these gaps can be used to smoothly pass the airflow through the vents of the shaft head 3 and into the interior of the insulating roll plate 121, so that the airflow can directly reach the area inside the insulating roll plate 121 that needs to be cooled, thereby efficiently achieving cooling treatment, while improving the cooling efficiency, and fully tapping the spatial structure potential inside the equipment. The profile frame 122 of the utility model adopts an assembleable aluminum alloy profile to form a circular keel frame. This material and structure can not only quickly conduct the heat generated by the induction coil itself and the radiated heat, avoid the accumulation of high temperature on the induction coil, dissipate heat through the large surface area of ​​the aluminum alloy profile, but also shield the electromagnetic field generated by the induction coil, and ensure that the profile frame 122 is lightweight while ensuring rigidity.

[0038] like Figure 5 , Figure 6As shown, the outer wall of the support outer ring 1222 is provided with a plurality of embedded cavities 1222a, and one end of the support frame 123 that is engaged with the support outer ring 1222 is provided with an embedded protrusion 1231, and the embedded protrusion 1231 is engaged with the embedded cavity 1222a, and the support frame 123 is provided with a hollow. Through the connection of the embedded cavity 1222a and the embedded protrusion 1231, the device can realize the stable engagement of the support frame 123 and the support outer ring 1222, and ensure the tightness and reliability of the connection between the two. Since the support frame 123 is provided with a hollow, while ensuring the stable connection, the weight of the overall structure can be reduced, and the hollow structure is also conducive to ventilation and heat dissipation to play its corresponding functions. In addition, this clamping method is easy to install and disassemble, and when the support frame 123 or the support outer ring 1222 needs to be maintained, replaced or adjusted, it can be operated more conveniently.

[0039] like Figure 7 As shown, the air guide portion 42 includes a flange 421 and a first folded edge 422, one side of the flange 421 is smoothly connected to the connection portion 41, an obtuse angle is formed between the flange 421 and the connection portion 41, the first folded edge 422 is smoothly connected to one end of the flange 421 and is vertically distributed to the connection portion 41, the first folded edge 422 faces the other side of the flange 421 away from the connection portion 41, and an obtuse angle is formed between the first folded edge 422 and the flange 421. The obtuse angle formed by the flange 421 and the connection portion 41 can cause the air to be subjected to a force that gradually changes direction when flowing through the area. When the air flows along the connection portion 41 to the flange 421, the existence of the obtuse angle causes the motion trajectory of the air molecules to be smoothly bent, which has the effect of reducing the turbulence of the air. The obtuse angle formed by the first folded edge 422 and the flange 421 further guides and constrains the air flow. After the air passes through the flange 421, the obtuse angle structure of the first folded edge 422 changes the air flow again. Through the continuous guidance of the two obtuse angles, the air can be accurately guided to the inside of the coil frame 12 at a specific angle and direction. Since the air can flow smoothly along the surface of the connecting portion 41 and the flange 421, and gradually change the flow direction under the guidance of the obtuse angle, this provides power for the subsequent air flow to the inside of the coil frame 12 to adjust the direction.

[0040] The other end of the flange 421 is rounded. After installation and fixation, the other end of the flange 421 is close to the hollow roller 11, and its end angle is rounded to avoid scratching the device. During the installation process, even if there is a slight position deviation, the rounded corner can prevent the hollow roller 11 from being scratched, ensuring that the surface finish and rotation accuracy of the hollow roller 11 are not affected; during operation, the outer sleeve 2 is rotated with one end of the rounded corner facing outward, which can avoid scratching with surrounding parts, ensure the safety of itself and surrounding parts, and ensure the normal operation of the equipment. In addition, the rounded corner design can avoid causing safety problems for the operator. During daily maintenance or overhaul, even if the operator accidentally touches it, he will not be scratched. At the same time, the rounded corner enhances the structural stability of the flange 421 itself, makes the stress distribution uniform, and effectively prevents problems such as cracks or deformation at the end of the flange 421, ensuring that it continues to perform functions such as wind guidance. When the outer sleeve 2 rotates and the rounded end of the flange 421 faces outward, the rounded corner helps to reduce the turbulence caused by the air flow in this area, making the air flow smoother and reducing the violent collision and irregular movement between air molecules. This not only helps to maintain the stability of the air flow to the inside of the coil frame 12 and improve the efficiency of functions such as heat dissipation, but also reduces the noise generated by air turbulence and improves the environmental friendliness of the device operation.

[0041] Furthermore, the air guide portion 42 also includes a second folded edge 423, which is smoothly connected to the first folded edge 422, and the second folded edge 423 is bent toward the connection portion 41, and the second folded edge 423 and the first folded edge 422 form an obtuse angle. The second folded edge 423 is smoothly connected to the first folded edge 422 and forms an obtuse angle, which increases the stability of the overall structure of the air guide portion 42. This multi-folded edge connection method is similar to a plurality of triangular structures, which can better withstand vibration and airflow impact during equipment operation, maintain a stable shape, and avoid affecting the airflow guiding effect. And compared with a simple structure, it can disperse external forces more evenly, increase the service life of the air guide portion 42, and reduce the frequency of maintenance or replacement. The temperature of the heating roller body 1 is higher than that of the outside, which causes the air to flow naturally from the outside to the inside. The air guide part 42 of the device is composed of a flange 421, a first folded edge 422 and a second folded edge 423, forming a "J"-shaped structure, which further strengthens the airflow circulation, so that the airflow can more fully contact the surface of the heating roller body 1 when it is close to the heating roller body 1, increase the heat exchange area and time, more effectively take away the heat, and enhance the cooling effect.

[0042] like Figure 8As shown, the side edge of the second folded edge 423 close to the connection part 41 and the side edge of the first folded edge 422 close to the connection part 41 are located on the plane extension line of the connection part 41, and the side edge of the second folded edge 423 away from the connection part 41 is rounded. The design of multiple obtuse angles of the air guide part 42 of the utility model, combined with the characteristics that the first folded edge 422 and the second folded edge 423 are located on the plane extension line of the connection part 41, makes the part of the air guide part 42 close to the connection part 41 smaller than the part away from the connection part 41, thereby forming a trumpet-like structure. This structure performs excellently in airflow guidance and can effectively reduce airflow resistance. According to Bernoulli's principle, the flow velocity of the airflow will increase accordingly when passing through this structure, which enables the airflow to pass through the vent at a faster speed and reach the surface of the insulating coil 121, thereby quickly taking away heat. Secondly, when the airflow of this structure flows from the outside to the inside, due to the smooth transition of multiple obtuse angles, it can also effectively avoid the generation of airflow vortices or turbulent areas in the airflow channel, but guide the airflow to form laminar flow. The airflow in the laminar state has the characteristics of high flow rate and stable flow state, which undoubtedly greatly improves the cooling efficiency and helps the equipment maintain good heat dissipation performance during operation, thereby ensuring the stable operation and service life of the equipment.

[0043] What is disclosed above is only one or more preferred embodiments of the present application, and cannot be used to limit the scope of rights of the present application. Ordinary technicians in this field can understand that all or part of the processes of implementing the above embodiments and equivalent changes made according to the claims of the present application are still within the scope covered by the present application.

Claims

1. A high-efficiency electromagnetic heating roller, characterized in that: The invention comprises a heating roller body (1), an outer shaft sleeve (2), a shaft head (3) and a fan blade (4), wherein the outer shaft sleeve (2) is sleeved on the outside of the heating roller body (1) and is rotatably connected to the heating roller body (1), the shaft heads (3) are respectively located at two ends of the outer shaft sleeve (2) and are fixedly connected to the outer shaft sleeve (2), the fan blade (4) is located on one side of the outer shaft sleeve (2) and is fixedly connected to the shaft head (3), the shaft head (3) is provided with a vent, the heating roller body (1) generates a magnetic field and generates a heat source for the outer shaft sleeve (2) through induction heating, and the fan blade (4) rotates with the outer shaft sleeve (2) and reduces the temperature of the heating roller body (1); The heating roller body (1) comprises a hollow roller shaft (11), a coil frame (12) and an electromagnetic coil (13); the hollow roller shaft (11) passes through the coil frame (12) and is fixedly connected to the coil frame (12); the electromagnetic coil (13) passes through the hollow roller shaft (11) and surrounds the coil frame (12) to form a heating zone; and the outer peripheral surface of the coil frame (12) is provided with a plurality of heating zones; The fan blade (4) comprises a connecting portion (41) and an air guide portion (42) fixedly connected to the connecting portion (41); the connecting portion (41) is fixedly connected to the shaft head (3); and when the fan blade (4) rotates, the air guide portion (42) guides airflow toward the heating roller body (1).

2. A high-efficiency electromagnetic heating roller as claimed in claim 1, characterized in that: The coil frame (12) comprises an insulating coil (121), a profile frame (122), a support frame (123) and a hollow ring plate (124); the hollow ring plate (124) is fixed to both ends of the insulating coil (121); the profile frame (122) is located at the center of the hollow ring plate (124); one end of the support frame (123) is clamped to the profile frame (122) and the other end is fixedly connected to the hollow ring plate (124); the support frame (123) is provided with a plurality of strips; The hollow roller shaft (11) passes through the center of the profile frame (122); the insulating roll plate (121) is provided with a plurality of wire outlet holes; and the hollow roller shaft (11) is provided with wire outlet grooves corresponding to the wire outlet holes. The electromagnetic coil (13) passes through the wire outlet slot and the wire outlet hole and surrounds the insulating roll plate (121).

3. A high-efficiency electromagnetic heating roller as claimed in claim 2, characterized in that: The profile frame (122) comprises a frame body (1221), a supporting outer ring (1222) and connecting bone strips (1223); the supporting outer ring (1222) is sleeved on the outside of the frame body (1221); one end of the connecting bone strip (1223) is connected to the inner wall of the supporting outer ring (1222), and the other end is connected to the frame body (1221); a plurality of connecting bone strips (1223) are arranged around the frame; and the supporting frame (123) is clamped to the supporting outer ring (1222).

4. A high-efficiency electromagnetic heating roller as claimed in claim 3, characterized in that: The outer wall surface of the supporting outer ring (1222) is provided with a plurality of embedded cavities (1222a). An embedding protrusion (1231) is provided at one end of the support frame (123) that is clamped with the support outer ring (1222); the embedding protrusion (1231) is clamped with the embedding cavity (1222a); and a hollow portion is provided on the support frame (123).

5. A high-efficiency electromagnetic heating roller as claimed in claim 1, characterized in that: The air guide portion (42) comprises a flange (421) and a first folded edge (422); one side of the flange (421) is smoothly connected to the connecting portion (41); the flange (421) and the connecting portion (41) form an obtuse angle; the first folded edge (422) is smoothly connected to one end of the flange (421) and is vertically distributed to the connecting portion (41); the first folded edge (422) faces the other side of the flange (421) away from the connecting portion (41); the first folded edge (422) and the flange (421) form an obtuse angle.

6. A high-efficiency electromagnetic heating roller as claimed in claim 5, characterized in that: The other end of the flange (421) is rounded.

7. A high-efficiency electromagnetic heating roller as claimed in claim 5, characterized in that: It also includes a second folded edge (423), the second folded edge (423) is smoothly connected to the first folded edge (422), the second folded edge (423) is bent towards the connecting portion (41), and the second folded edge (423) and the first folded edge (422) form an obtuse angle.

8. A high-efficiency electromagnetic heating roller as claimed in claim 7, characterized in that: A side edge of the second folded edge (423) close to the connecting portion (41) and a side edge of the first folded edge (422) close to the connecting portion (41) are located on a plane extension line of the connecting portion (41), and a side edge of the second folded edge (423) away from the connecting portion (41) is rounded.

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