Electromagnetic induction heater and electromagnetic induction heating device
By designing an electromagnetic induction heater and utilizing a support and magnetic conductor structure, efficient heating without the need for winding heating wires is achieved, solving the problems of long heating time and low efficiency in existing technologies and improving the heating efficiency of mechanical equipment workpieces.
Patent Information
- Application Number
- CN202423136638.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-18
- Publication Date
- 2025-12-23
- Estimated Expiration
- 2034-12-18
AI Technical Summary
Existing heaters typically use a heating wire winding method, which is time-consuming and labor-intensive, has low power, and insufficient heating depth, resulting in long workpiece heating time and low work efficiency.
An electromagnetic induction heater is used, which includes a support, an electromagnetic induction heating coil, and multiple magnetic conductors. The support is ring-shaped, and the magnetic conductors are arranged at intervals along the ring outline of the support. The electromagnetic induction heating coil is wrapped around the magnetic conductors, and the workpiece is heated by electromagnetic induction.
It eliminates the need for winding heating wires, improving heating efficiency, shortening heating time, enhancing work efficiency, and increasing magnetic field concentration and eddy current Joule heating efficiency.
Smart Images
Figure CN223714209U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a heating device, especially to an electromagnetic induction heater and electromagnetic induction heating device. BACKGROUND
[0002] Among the parts of mechanical equipment, there are some workpieces that are assembled by interference fit, such as the fit of shaft and sleeve. The heating assembly mainly utilizes the thermal expansion and contraction characteristics of objects to heat one of the two assembled parts to a certain temperature, so that it expands to a certain extent, and then it is immediately assembled to the other part, and after cooling and shrinking, the two parts are tightly combined together to form a whole, achieving the purpose of heating assembly. The principle of heating disassembly is the same as that of heating assembly. The workpieces of this type of interference fit need to be heated to a certain extent before they can be disassembled. For example, the disassembly of the CVR motor rotor shaft and the coupling in the nuclear power field, the disassembly of the shield water pump shaft and the flange, etc. However, the existing heaters of this type are usually made by winding mica sheets around the heating wire, which requires manual winding of the heating wire layer by layer on the workpiece to be heated, which is time-consuming and labor-intensive. Moreover, the power of the heating wire is limited, and the power of the heater is low, which results in insufficient heating depth on the workpiece, leading to long heating time of the workpiece and low work efficiency. SUMMARY
[0003] The technical problem to be solved by the utility model is to provide an electromagnetic induction heater and electromagnetic induction heating device to solve at least one of the defects in the above background art.
[0004] The utility model adopts the technical scheme that: an electromagnetic induction heater is provided, which comprises a support, an electromagnetic induction heating coil and a plurality of magnetic conductors; the support is annular, each magnetic conductor is connected to the support, and each magnetic conductor is arranged along the annular contour of the support; the electromagnetic induction heating coil is wrapped around all the magnetic conductors, and the length direction of each magnetic conductor is parallel to the central axis of the electromagnetic induction heating coil.
[0005] In some embodiments, the support comprises a first part and a second part in arc shape; the first part comprises a first end and a second end opposite on the arc contour, and the second part comprises a third end and a fourth end opposite on the arc contour; the first end and the third end are rotationally connected, and the second end and the fourth end open and close with the relative rotation of the first end and the third end.
[0006] In some embodiments, the electromagnetic induction heating coil comprises a first coil segment located in the first part and a second coil segment located in the second part, one end of the first coil segment close to the second end is provided with a first cable coupling piece, one end of the second coil segment close to the fourth end is provided with a second cable coupling piece, and the first cable coupling piece and the second cable coupling piece are detachably connected.
[0007] In some embodiments, the support comprises two annular side plates arranged in parallel and spaced apart, and two ends of each magnetic conductor in the length direction are connected to the two side plates respectively.
[0008] In some embodiments, the electromagnetic induction heater further comprises an electromagnetic shielding shell arranged on the side of the magnetic conductor away from the central axis, and the electromagnetic shielding shell is connected to the two side plates respectively.
[0009] In some embodiments, the electromagnetic shielding shell is provided with an opening; the electromagnetic induction heating coil has two first plug ends for connecting to the power supply device, and the two first plug ends are exposed outside through the opening; and / or, the electromagnetic induction heater further comprises a temperature measuring element in contact with the electromagnetic induction heating coil, and the temperature measuring element comprises a second plug end for connecting to the power supply device, and the second plug end is exposed outside through the opening.
[0010] In some embodiments, the surface of each magnetic conductor facing the electromagnetic induction heating coil is provided with a plurality of grooves, and the electromagnetic induction heating coil comprises a plurality of cables, and the cables and the grooves are embedded and fixed in a one-to-one correspondence.
[0011] In some embodiments, the electromagnetic induction heating coil comprises a wire layer, an insulating coating layer and an insulating sheath arranged in sequence from the inside to the outside.
[0012] In some embodiments, the material of the magnetic conductor comprises at least one of manganese-zinc ferrite, neodymium-iron-boron magnetic core and samarium-cobalt magnetic core.
[0013] The utility model also provides a kind of electromagnetic induction heating device, it includes power supply device and the electromagnetic induction heater of any one above, and power supply device and electromagnetic induction heater are connected, to provide power supply for electromagnetic induction heater.
[0014] The utility model has at least the following beneficial effects: each magnetic conductor is connected to the annular support, each magnetic conductor is arranged along the annular contour of the support, the electromagnetic induction heating coil is wrapped around all the magnetic conductors, the annular support is suitable for the workpiece of shaft, shaft sleeve type, the annular support provides a basis for the installation of electromagnetic induction heating coil, the support is sleeved on the outer periphery of the workpiece to be heated, so that the electromagnetic induction heating coil is located on the outer periphery of the workpiece to be heated, and the workpiece is heated relying on electromagnetic induction principle. In this way, it is not necessary to wrap heating wire on the outer periphery of each workpiece to be heated, which saves working time and improves work efficiency. On the other hand, since the electromagnetic induction heating coil is wrapped around all the magnetic conductors, and the length direction of each magnetic conductor is parallel to the central axis of the electromagnetic induction heating coil, these magnetic conductors can increase the self-induction of the electromagnetic induction heating coil, and concentrate the magnetic field between the electromagnetic induction heating coils, thereby enhancing the magnetic field concentration, improving the efficiency of eddy current and joule heat, and effectively improving the heating efficiency of the workpiece to be heated. BRIEF DESCRIPTION OF DRAWINGS
[0015] In order to more clearly illustrate the technical scheme of the present application, the present application will be further described below with reference to the drawings and embodiments. In the drawings:
[0016] Figure 1 is a structural schematic diagram of the electromagnetic induction heater in the open state according to some embodiments of the present application;
[0017] Figure 2 is Figure 1 is a structural schematic diagram of the electromagnetic induction heater in the closed state according to some embodiments of the present application;
[0018] Figure 3 is Figure 1 is a structural schematic diagram of the electromagnetic induction heater after hiding part of the electromagnetic shielding shell according to some embodiments of the present application;
[0019] Figure 4 is a circuit principle schematic diagram of the electromagnetic induction heating device according to some embodiments of the present application;
[0020] Figure 5 is a magnetic field distribution schematic diagram of the electromagnetic induction heater according to some embodiments of the present application;
[0021] Figure 6 is a local structure enlarged schematic diagram of the electromagnetic induction heater according to some embodiments of the present application. DETAILED DESCRIPTION
[0022] In order to have a more clear understanding of the technical features, purposes and effects of the present application, the specific implementation manner of the present application will be described in detail with reference to the drawings. In the following description, it should be understood that, unless otherwise explicitly specified and limited, the terms such as "mounting", "connecting", "connecting", "fixing", "setting" and the like should be interpreted in a broad sense, for example, can be fixedly connected, or can be detachably connected, or can be integrated; can be mechanically connected, or can be electrically connected; can be directly connected, or can be indirectly connected through an intermediate medium, or can be the internal connection of two elements or the interaction relationship between two elements. When an element is referred to as "on" or "under" another element, the element can be "directly" or "indirectly" located on the other element, or there can be one or more intermediate elements. The terms "first", "second", "third" and the like are only for the convenience of describing the technical scheme, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second", "third" and the like can explicitly or implicitly include one or more of the features. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.
[0023] The utility model provides a kind of electromagnetic induction heating device, it includes power device and electromagnetic induction heater, power device and electromagnetic induction heater connection, for electromagnetic induction heater provides power supply.
[0024] As Figure 1 As shown in the utility model one embodiment of electromagnetic induction heater, the electromagnetic induction heater can be used in nuclear power plant The heating disassembly of various shaft and sleeve matched workpieces, for example CVR motor rotor main shaft and coupling, shielding water pump main shaft and flange etc. Of course, the electromagnetic induction heater can also be applicable to the heating disassembly of shaft and sleeve matched workpieces in other fields.
[0025] The electromagnetic induction heater at least includes support, electromagnetic induction heating coil 2 and multiple magnetic conductors 3. Support can adopt mica plate, silicate or polyphenyl ether ketone (PPEK) etc. Easy-to-machine high-temperature-resistant material is made. Support is annular, and each magnetic conductor 3 is connected to support. Each magnetic conductor 3 is arranged along the annular profile of support, that is, each magnetic conductor 3 is arranged annularly and spaced apart on support with the annular profile of support as reference. Electromagnetic induction heating coil 2 is wrapped around all magnetic conductors 3. Specifically, electromagnetic induction heating coil 2 is wrapped on the outer side of magnetic conductor 3, that is, the side of magnetic conductor 3 away from the central axis Y of electromagnetic induction heating coil 2. And each magnetic conductor 3 is strip-shaped, and the length direction of each magnetic conductor 3 is parallel to the central axis Y of electromagnetic induction heating coil 2.
[0026] Annular support is adapted to shaft, shaft sleeve type workpiece, and annular support provides a basis for the installation of electromagnetic induction heating coil 2, and the support is sleeved on the outer periphery of the workpiece to be heated, so that the electromagnetic induction heating coil 2 is located on the outer periphery of the workpiece to be heated, and the workpiece is heated by electromagnetic induction principle. In this way, it is not necessary to wrap heating wire on the outer periphery of each workpiece to be heated, which saves working time and improves work efficiency.
[0027] As Figure 4As shown, the power supply device and the electromagnetic induction heating coil 2 are connected. The principle of the electromagnetic induction heating coil 2 heating the workpiece is roughly as follows: the induction power supply in the power supply device is connected to the mains, and the 220V / 380V alternating current is rectified into a direct current power supply by the rectifier circuit 71. The rectifier circuit 71 rectifies the three-phase alternating current into direct current based on the basic principle of unidirectional conduction and blocking of diodes or thyristors. The direct current power supply passes through the controller 72, the edge gate bipolar transistor 73 and the resonance capacitor 74. The resonance capacitor 74 and the electromagnetic induction heating coil 2 (equivalent to an inductor) form an oscillation circuit 75, which can make the electromagnetic induction heating coil 2 obtain an oscillating current with a size and direction that changes with the period. When a certain frequency of oscillating current passes through the electromagnetic induction heating coil 2, an alternating magnetic field with the same frequency as the current changes will be generated inside and outside the electromagnetic induction heating coil 2. When the metal workpiece is placed in the space enclosed by the electromagnetic induction heating coil 2, an induced current with the same frequency as the electromagnetic induction heating coil 2 but opposite in direction will be generated in the workpiece under the action of the magnetic field. Since the induced current forms a closed loop along the surface of the workpiece, it is commonly referred to as eddy current. This eddy current will convert electrical energy into heat energy, rapidly heating the surface of the workpiece. In other words, based on the law of electromagnetic induction, when the oscillating current flows through the electromagnetic induction heating coil 2, a strong magnetic flux with high-frequency polarity changes will be generated inside the electromagnetic induction heating coil 2. Placing the metal workpiece to be heated in the electromagnetic induction heating coil 2, the strong magnetic flux will penetrate the entire workpiece to be heated. Inside the workpiece to be heated, eddy currents in the opposite direction to the current of the electromagnetic induction heating coil 2 are generated. Due to the internal resistance of the workpiece to be heated, when the eddy current acts on the metal workpiece, Joule heat is generated inside the workpiece, causing the temperature of the workpiece to rise rapidly, achieving the purpose of heating the metal workpiece. For more principles of electromagnetic induction heating, please refer to the prior art.
[0028] As shown in FIG. 1, Figure 5 As shown in FIG. 1, Figure 5 As shown in FIG. 1, the magnetic induction line distribution diagram after the magnetic conductor 3 is added to the inside of the electromagnetic induction heating coil 2 is shown. The magnetic induction lines are schematically shown by dashed lines with arrows. Adding the magnetic conductor 3 to the inside of the electromagnetic induction heating coil 2 can increase the self-induction of the electromagnetic induction heating coil 2 and concentrate the magnetic field between the electromagnetic induction heating coil 2, thereby enhancing the magnetic field concentration degree and improving the efficiency of the eddy current and Joule heat, thereby improving the heating speed and effect. The material of the magnetic conductor 3 can include at least one of manganese-zinc ferrite, neodymium-iron-boron magnetic core, and samarium-cobalt magnetic core. That is, the material of each magnetic conductor 3 can be uniformly selected as one of manganese-zinc ferrite, neodymium-iron-boron magnetic core, and samarium-cobalt magnetic core; or, the material of some of the magnetic conductors 3 can be selected as one of manganese-zinc ferrite, neodymium-iron-boron magnetic core, and samarium-cobalt magnetic core, and the material of the other magnetic conductors 3 can be selected as another one of manganese-zinc ferrite, neodymium-iron-boron magnetic core, and samarium-cobalt magnetic core; that is, the materials of the magnetic conductors 3 can be the same or different.
[0029] In summary, since each magnetic conductor 3 is connected to a ring-shaped support, and the magnetic conductors 3 are arranged at intervals along the ring-shaped contour of the support, the electromagnetic induction heating coil 2 is wrapped around all the magnetic conductors 3. The ring-shaped support is suitable for workpieces with shaft or bushing shapes. The ring-shaped support provides a foundation for the installation of the electromagnetic induction heating coil 2. By placing the support around the outer circumference of the workpiece to be heated, the electromagnetic induction heating coil 2 is positioned on the outer circumference of the workpiece, and the workpiece is heated by electromagnetic induction. In this way, there is no need to wrap a heating wire around the outer circumference of each workpiece, saving working time and improving work efficiency. On the other hand, since the electromagnetic induction heating coil 2 is wrapped around all the magnetic conductors 3, and the length direction of each magnetic conductor 3 is parallel to the central axis Y of the electromagnetic induction heating coil 2, these magnetic conductors 3 can increase the self-inductance of the electromagnetic induction heating coil 2 and concentrate the magnetic field between the electromagnetic induction heating coils 2, thereby enhancing the magnetic field concentration, improving the efficiency of eddy currents and Joule heating, and effectively improving the heating efficiency of the workpiece to be heated.
[0030] like Figures 1 to 3 As shown, in some embodiments, the bracket includes an arc-shaped first portion 101 and a second portion 102. The first portion 101 and the second portion 102 may each be semi-circular. The first portion 101 includes a first end 101A and a second end 101B opposite each other on the arc-shaped profile, and the second portion 102 includes a third end 102A and a fourth end 102B opposite each other on the arc-shaped profile. The first end 101A and the third end 102A are rotatably connected, and the second end 101B and the fourth end 102B open and close as the first end 101A and the third end 102A rotate relative to each other. That is, the second end 101B and the fourth end 102B can switch between a first position and a second position as the first end 101A and the third end 102A rotate relative to each other. Specifically, as... Figure 1 As shown, in the first position, the second end 101B and the fourth end 102B are relatively separated; as Figure 2 As shown, in the second position, the second end 101B and the fourth end 102B are joined together. Therefore, by opening and closing the bracket, it is possible to conveniently and quickly place the bracket onto the outer periphery of the workpiece to be heated, and also conveniently and quickly remove the bracket from the outer periphery of the workpiece to be heated, further improving the efficiency of assembly and disassembly between the electromagnetic induction heater and the workpiece to be heated, saving working time and increasing work efficiency.
[0031] like Figures 1 to 3As shown, in some embodiments, the corresponding bracket includes an arc-shaped first portion 101 and a second portion 102. The electromagnetic induction heating coil 2 mounted on the bracket includes a first coil segment 21 located in the first portion 101 and a second coil segment 22 located in the second portion 102. A first cable 20 coupling member 61 is provided at the end of the first coil segment 21 near the second end 101B, and a second cable 20 coupling member 62 is provided at the end of the second coil segment 22 near the fourth end 102B. The first cable 20 coupling member 61 and the second cable 20 coupling member 62 are detachably connected. Specifically, as... Figure 1 As shown, in the first position, the second end 101B and the fourth end 102B are relatively separated, and the first cable 20 coupling member 61 and the second cable 20 coupling member 62 are also relatively separated. The electromagnetic induction heating coil 2 is in an open circuit state, and no current is generated in the electromagnetic induction heating coil 2 at this time; Figure 2 As shown, in the second position, the second end 101B and the fourth end 102B are joined together, the first cable 20 coupling member 61 and the second cable 20 coupling member 62 are also connected together, and the electromagnetic induction heating coil 2 is in a closed state. At this time, the electromagnetic induction heating coil 2 can generate an oscillating current under the drive of the power supply device.
[0032] like Figure 3 As shown, in some embodiments, the bracket includes two annular side plates 11 arranged parallel to each other, with each end of the magnetic conductor 3 connected to the two side plates 11. Specifically, each side plate 11 has a recessed mounting groove on its edge, and the number of mounting grooves on each side plate 11 is equal to the number of magnetic conductors 3. Each end of the magnetic conductor 3 can be fitted and connected to the two opposite mounting grooves on the two side plates 11, thereby fixing the magnetic conductor 3 to the bracket.
[0033] like Figures 1 to 3 As shown, in some embodiments, the electromagnetic induction heater further includes an electromagnetic shielding shell 4, which is disposed on the side of the magnetic conductor 3 away from the central axis Y. The electromagnetic shielding shell 4 is connected to two side plates 11 respectively. The electromagnetic shielding shell 4 is used to reduce the outward diffusion and leakage of the magnetic field near the electromagnetic induction heating coil 2, so that the magnetic field near the workpiece to be heated can be maintained in a relatively concentrated state to maintain a better heating efficiency; in addition, the electromagnetic shielding shell 4 can also prevent the magnetic field of the electromagnetic induction heater from spreading and leaking outward and affecting other equipment, thereby improving the electromagnetic compatibility of the electromagnetic induction heater with other equipment.
[0034] like Figure 1 and Figure 2As shown, in some embodiments, the electromagnetic shielding shell 4 has an opening 40. The electromagnetic induction heating coil 2 has two first plug terminals 23 for connecting to a power supply device, and the two first plug terminals 23 are exposed through the opening 40. That is, the opening 40 can provide clearance for the first plug terminals 23, which can extend through the opening 40 to the outside of the electromagnetic shielding shell 4 and connect to the power supply device.
[0035] like Figures 1 to 3 As shown, in some embodiments, the electromagnetic induction heater further includes a temperature sensing element 5, which is in contact with the electromagnetic induction heating coil 2. Specifically, the temperature sensing element 5 can be a thermocouple, and the probe of the thermocouple can be directly fixed to the inner side of the electromagnetic induction heating coil 2. The temperature sensing element 5 includes a second plug end 52 for connecting to a power supply device, and the second plug end 52 is exposed through an opening 40. That is, the opening 40 can also provide clearance for the second plug end 52, which can extend through the opening 40 to the outside of the electromagnetic shielding shell 4 and connect to the power supply device. The power supply device receives the temperature information measured by the temperature sensing element 5 so that personnel can monitor the temperature of the workpiece to be heated and the electromagnetic induction heating coil 2 in real time. When the temperature of the workpiece to be heated or the electromagnetic induction heating coil 2 rises to a certain threshold, the power supply to the electromagnetic induction heating coil 2 is stopped to prevent the temperature of the electromagnetic induction heating coil 2 from becoming too high, and also to prevent the temperature of the workpiece to be heated from becoming too high and damaging the metallographic structure of the workpiece.
[0036] like Figure 1 and Figure 2 As shown, in some embodiments, the electromagnetic shielding shell 4 is provided with two handles 8, which are located on opposite sides symmetrically along the central axis Y. These handles 8 can be gripped by personnel, facilitating the handling of the electromagnetic induction heater.
[0037] like Figure 6 As shown, in some embodiments, the electromagnetic induction heating coil 2 includes multiple cables 20. Each cable 20 includes a conductor layer, an insulating coating, and an insulating sheath stacked sequentially from the inside out. The conductor layer can be made of copper wire or other metal conductors. The insulating coating material can include materials with insulating and protective properties such as silicone oil, epoxy coating, and polytetrafluoroethylene coating. The insulating sheath further enhances the safety of the electromagnetic induction heating coil 2 outside the insulating coating. The insulating sheath material is mainly selected from high-temperature resistant materials, and the insulating sheath material can include fiberglass cloth, mica tape, polytetrafluoroethylene tape, silicone, polyimide film, etc.
[0038] like Figure 6As shown, in some embodiments, each magnetic conductor 3 has a plurality of grooves 30 on its surface facing the electromagnetic induction heating coil 2. The electromagnetic induction heating coil 2 includes a plurality of cables 20, and the cables 20 and the grooves 30 are fitted and fixed in a one-to-one correspondence, so that the electromagnetic induction heating coil 2 is limited on the magnetic conductor 3.
[0039] It is understood that the above embodiments only illustrate preferred embodiments of the present utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present utility model patent. It should be noted that for those skilled in the art, the above technical features can be freely combined, and several modifications and improvements can be made without departing from the concept of the present utility model, all of which fall within the protection scope of the present utility model. Therefore, all equivalent transformations and modifications made with respect to the scope of the claims of the present utility model should fall within the scope of the claims of the present utility model.
Claims
1. An electromagnetic induction heater, characterized in that, It includes a support frame, an electromagnetic induction heating coil (2), and multiple magnetic conductors (3); The support is ring-shaped, and each of the magnetic conductors (3) is connected to the support. The magnetic conductors (3) are arranged at intervals along the ring-shaped outline of the support. The electromagnetic induction heating coil (2) is wrapped around all the magnetic conductors (3), and the length direction of each magnetic conductor (3) is parallel to the central axis (Y) of the electromagnetic induction heating coil (2).
2. The electromagnetic induction heater according to claim 1, characterized in that, The bracket includes an arc-shaped first part (101) and a second part (102); The first part (101) includes a first end (101A) and a second end (101B) opposite each other on the arcuate profile, and the second part (102) includes a third end (102A) and a fourth end (102B) opposite each other on the arcuate profile. The first end (101A) and the third end (102A) are rotatably connected, and the second end (101B) and the fourth end (102B) open and close as the first end (101A) and the third end (102A) rotate relative to each other.
3. The electromagnetic induction heater according to claim 2, characterized in that, The electromagnetic induction heating coil (2) includes a first coil segment (21) located in the first part (101) and a second coil segment (22) located in the second part (102). The first coil segment (21) is provided with a first cable coupling member (61) at one end near the second end (101B), and the second coil segment (22) is provided with a second cable coupling member (62) at one end near the fourth end (102B). The first cable coupling member (61) and the second cable coupling member (62) are detachably connected.
4. The electromagnetic induction heater according to claim 1, characterized in that, The bracket includes two annular side plates (11) arranged relatively parallel and spaced apart, and each of the magnetic conductors (3) is connected to the two side plates (11) at both ends in the length direction.
5. The electromagnetic induction heater according to claim 4, characterized in that, The electromagnetic induction heater also includes an electromagnetic shielding shell (4), which is disposed on the side of the magnetic conductor (3) away from the central axis (Y), and the electromagnetic shielding shell (4) is connected to the two side plates (11) respectively.
6. The electromagnetic induction heater according to claim 5, characterized in that, The electromagnetic shielding shell (4) is provided with an opening (40); The electromagnetic induction heating coil (2) has two first plug terminals (23) for connecting to a power supply device, the two first plug terminals (23) being exposed through the opening (40); and / or, the electromagnetic induction heater further includes a temperature sensing element (5) in contact with the electromagnetic induction heating coil (2), the temperature sensing element (5) including a second plug terminal (52) for connecting to a power supply device, the second plug terminal (52) being exposed through the opening (40).
7. The electromagnetic induction heater according to claim 1, characterized in that, Each of the magnetic conductors (3) has multiple grooves (30) on its surface facing the electromagnetic induction heating coil (2). The electromagnetic induction heating coil (2) includes multiple cables (20), and the cables (20) and the grooves (30) are fitted and fixed in a one-to-one correspondence.
8. The electromagnetic induction heater according to claim 1, characterized in that, The electromagnetic induction heating coil (2) includes a conductor layer, an insulating coating and an insulating sheath stacked sequentially from the inside to the outside.
9. The electromagnetic induction heater according to claim 1, characterized in that, The material of the magnetic conductor (3) is one of manganese zinc ferrite, neodymium iron boron magnetic core, or samarium cobalt magnetic core.
10. An electromagnetic induction heating device, characterized in that, It includes a power supply device and an electromagnetic induction heater as described in any one of claims 1 to 9, wherein the power supply device is connected to the electromagnetic induction heater and provides power to the electromagnetic induction heater.