A heating electrode structure and heating device

Abstract

The utility model discloses a kind of heating electrode structure and heating device, the heating electrode structure includes: at least two parallel connections of cylindrical spiral coil formed by the same continuous metal wire winding;The first end of each cylindrical spiral coil is communicated, for receiving radio frequency signal;The second end of each cylindrical spiral coil is all grounded;Each cylindrical spiral coil is stacked arrangement.The utility model provides a kind of heating electrode structure and heating device, while increasing the heating area of heated body can improve the uniformity and efficiency of heated body being heated.

Description

Technical Field

[0001] This utility model relates to the field of radio frequency heating technology, and in particular to a heating electrode structure and a heating device. Background Technology

[0002] In radio frequency (RF) heating, the cylindrical spiral coil is a key component for converting RF energy into heat energy. It is the load of the RF power supply, and its performance has a significant impact on whether the RF energy to heat energy conversion can be successfully achieved and the conversion efficiency.

[0003] The length of the cylindrical spiral coil is directly proportional to the heating uniformity and volume of the heated object. The longer the cylindrical spiral coil, the better the heating uniformity and the larger the volume of the heated object. However, increasing the length of the cylindrical spiral coil will increase the coil inductance. At the same time, as a load of the RF power supply, its impedance will increase exponentially. This will cause the voltage at the feed port to rise, making the insulation of the load body more susceptible to breakdown, thus affecting the stability and normal operation of the heating device. Utility Model Content

[0004] This invention provides a heating electrode structure and a heating device that can increase the heating area of ​​the heated body while improving the uniformity and efficiency of heating.

[0005] According to one aspect of the present invention, a heating electrode structure is provided, the heating electrode structure comprising: at least two parallel-connected columnar spiral coils formed by winding the same continuous metal wire;

[0006] The first end of each of the columnar spiral coils is connected to receive radio frequency signals;

[0007] The second end of each of the aforementioned cylindrical spiral coils is grounded;

[0008] The columnar spiral coils are stacked in layers.

[0009] Optionally, each of the cylindrical spiral coils has the same number of turns and the same spiral direction.

[0010] Optionally, each of the cylindrical helical coils is coaxially arranged along the same central axis.

[0011] Optionally, the interior of the metal wire is hollow, and the interior of the metal wire is used to receive the cooling medium.

[0012] Optionally, the second end of each of the columnar spiral coils can be reused as a cooling medium input end.

[0013] Optionally, the heating electrode structure provided in this embodiment further includes a conductive connection structure;

[0014] The conductive connection structure includes a through hole;

[0015] The metal wire passes through the through hole, and the inner wall of the through hole contacts the metal wire;

[0016] The first end of each of the cylindrical spiral coils is located inside the through hole.

[0017] Optionally, the heating electrode structure contains two cylindrical spiral coils, namely a first cylindrical spiral coil and a second cylindrical spiral coil.

[0018] The first end of the metal wire is the second end of the first columnar spiral coil, and the second end of the metal wire is the second end of the second columnar spiral coil;

[0019] The first end of the first columnar spiral coil is connected to the first end of the second columnar spiral coil, and the line connecting the first end of the first columnar spiral coil and the first end of the second columnar spiral coil is parallel to the central axis of the columnar spiral coil.

[0020] Optionally, the cross-sectional shape of the cylindrical helical coil is circular, elliptical, or polygonal.

[0021] Optionally, the inner diameter of the cylindrical spiral coil ranges from 100mm to 1000mm;

[0022] The pitch range of the columnar spiral coil is 10mm to 100mm.

[0023] According to another aspect of the present invention, a heating device is provided, which includes a radio frequency power supply, an impedance matching device, and a heating electrode structure provided in any embodiment of the present invention.

[0024] The radio frequency power supply is electrically connected to the impedance matching device, and the impedance matching device is electrically connected to each of the columnar spiral coils in the heating electrode structure.

[0025] This invention provides a heating electrode structure in which a continuous metal wire is wound to form multiple stacked and parallel-connected cylindrical spiral coils. This results in a compact and reliable heating electrode structure, increasing the heat-receiving area of ​​the heated object. The parallel connection of multiple cylindrical spiral coils effectively reduces the overall impedance of the heating electrode structure, which is beneficial for efficient injection and uniform distribution of radio frequency power, thereby improving the uniformity and efficiency of heating the heated object. In summary, the heating electrode structure provided by this invention increases the heat-receiving area of ​​the heated object while improving the uniformity and efficiency of heating.

[0026] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of this utility model, nor is it intended to limit the scope of this utility model. Other features of this utility model will become readily apparent from the following description. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a three-dimensional structural diagram of a heating electrode structure according to an embodiment of the present utility model;

[0029] Figure 2 yes Figure 1 Left view of the heating electrode structure shown;

[0030] Figure 3 yes Figure 1 The front view of the heating electrode structure shown;

[0031] Figure 4 yes Figure 1 A top view of the heating electrode structure shown;

[0032] Figure 5 This is a schematic diagram of the circuit principle of a heating electrode structure according to an embodiment of the present utility model;

[0033] Figure 6 This is a schematic diagram of a heating device provided according to an embodiment of the present utility model. Detailed Implementation

[0034] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0035] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the utility model described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0036] Figure 1 This is a three-dimensional structural diagram of a heating electrode structure according to an embodiment of the present invention. Figure 2 yes Figure 1 The left view of the heating electrode structure shown. Figure 3 yes Figure 1 The front view of the heating electrode structure shown is shown. Figure 4 yes Figure 1 The top view of the heating electrode structure shown. Figure 5 This is a circuit diagram illustrating the heating electrode structure according to an embodiment of the present invention. (Refer to...) Figures 1-5 The heating electrode structure provided in this embodiment includes: at least two parallel-connected columnar spiral coils 110 formed by winding the same continuous metal wire 101; the first end of each columnar spiral coil 110 is connected for receiving radio frequency signals; the second end of each columnar spiral coil 110 is grounded; and the columnar spiral coils 110 are stacked.

[0037] Specifically, the number of parallel-connected cylindrical spiral coils 110 in the heating electrode structure can be 2, 3, 4, or 5, etc.

[0038] Compared to the volume that a single cylindrical spiral coil 110 can heat, this embodiment provides multiple cylindrical spiral coils 110, and the cylindrical spiral coils 110 are stacked, which can expand the heating volume of the heated body.

[0039] Impedance simulation revealed that the impedance of a single cylindrical helical coil 110 is R50 + 244Ω, while the impedance of two cylindrical helical coils 110 connected in parallel is R50 + 119.28Ω. This shows that connecting two cylindrical helical coils 110 in parallel reduces the actual imaginary impedance by 50%. Furthermore, according to the formula relating power, voltage, and impedance: P = U... 2 / R, the voltage at the feed port of two parallel cylindrical spiral coils 110 is 30% lower than that of a single cylindrical spiral coil 110. It is evident that using multiple parallel cylindrical spiral coils 110 to heat the object can reduce the impedance of the heating electrode structure, lower the voltage at the feed port, increase the heating area of ​​the object, and improve the heating uniformity.

[0040] In this embodiment, the multiple columnar spiral coils 110 are formed by winding a single metal wire 101, which reduces the welding steps at the connection ports of each columnar spiral coil 110 and improves the reliability of the connection of each columnar spiral coil 110.

[0041] This embodiment provides a heating electrode structure in which a continuous metal wire is wound to form multiple stacked and parallel-connected cylindrical spiral coils. This results in a compact and reliable heating electrode structure, increasing the heat-receiving area of ​​the heated object. The parallel connection of multiple cylindrical spiral coils effectively reduces the overall impedance of the heating electrode structure, which is beneficial for efficient injection and uniform distribution of radio frequency power, thereby improving the uniformity and efficiency of heating the heated object. In summary, the heating electrode structure provided in this embodiment increases the heat-receiving area of ​​the heated object while improving the uniformity and efficiency of heating.

[0042] Optional, continue to refer to Figures 1-4 Each cylindrical spiral coil 110 has the same number of turns and the same spiral direction.

[0043] Specifically, the number of turns of each cylindrical spiral coil 110 can be 3, 4, 5, or 6, etc.

[0044] By setting the number of turns of each columnar spiral coil 110 to be the same and the spiral direction to be the same, the electrical parameters (such as inductance value) of each columnar spiral coil 110 can be highly consistent, ensuring that the radio frequency current is evenly distributed in each parallel branch, fundamentally improving the symmetry and uniformity of the heating field.

[0045] Optional, continue to refer to Figures 1-4 Each columnar spiral coil 110 is coaxially arranged along the same central axis.

[0046] Specifically, the electromagnetic field generated by the coaxially arranged cylindrical spiral coils 110 is symmetrically distributed in space, which is conducive to forming a uniform heating area, reducing energy leakage, and further improving thermal energy utilization efficiency and heating uniformity.

[0047] Optional, continue to refer to Figures 1-4 The interior of the metal wire 101 is hollow, and the interior of the metal wire 101 is used to receive the cooling medium.

[0048] Specifically, the built-in cooling channel in the metal wire 101 enables active heat dissipation, which can effectively control the operating temperature of the heating electrode structure, prevent overheating deformation or performance degradation, and significantly improve power carrying capacity and service life.

[0049] Optional, continue to refer to Figures 1-4 The second end of each columnar spiral coil 110 is reused as the input end of the cooling medium.

[0050] Specifically, this embodiment integrates the electrical grounding terminal and the cooling medium inlet function into one, simplifying the complexity of the heating electrode structure and external pipeline connection.

[0051] Optional, continue to refer to Figures 1-4 The heating electrode structure provided in this embodiment also includes a conductive connection structure 120; the conductive connection structure 120 includes a through hole; the metal wire 101 passes through the through hole, and the inner wall of the through hole contacts the metal wire 101; the first end of each columnar spiral coil 110 is located inside the through hole.

[0052] Specifically, the first end of each cylindrical spiral coil 110 is the radio frequency input terminal RF in of the heating electrode structure.

[0053] By placing the first end of each columnar spiral coil 110 inside a through hole in the conductive connection structure 120, the mechanical fixation and electrical connection of the radio frequency signal input end are integrated, ensuring a low impedance and high reliability electrical connection, while simplifying the assembly process.

[0054] Optional, continue to refer to Figures 1-4 The heating electrode structure contains two cylindrical spiral coils 110, namely a first cylindrical spiral coil and a second cylindrical spiral coil; the first end 111 of the metal wire 101 is the second end of the first cylindrical spiral coil, and the second end 112 of the metal wire 101 is the second end of the second cylindrical spiral coil; the first end of the first cylindrical spiral coil and the first end of the second cylindrical spiral coil are connected, and the line connecting the first end of the first cylindrical spiral coil and the first end of the second cylindrical spiral coil is parallel to the central axis of the cylindrical spiral coil 110.

[0055] Specifically, the first and second columnar spiral coils are arranged coaxially, and the connecting section between the first end of the first and second columnar spiral coils is parallel to the central axis, making the electromagnetic field distribution highly symmetrical. This is particularly suitable for heating applications with extremely high uniformity requirements, and the structure is simple, easy to manufacture and install.

[0056] Optionally, the cross-sectional shape of the cylindrical helical coil can be circular, elliptical, or polygonal.

[0057] For example, continue to refer to Figures 1-4The cross-sectional shape of the cylindrical helical coil 110 is circular.

[0058] Optionally, the inner diameter of the cylindrical spiral coil ranges from 100mm to 1000mm; the spacing between two adjacent cylindrical spiral coils ranges from 10mm to 100mm. This configuration enables efficient and uniform heating while obtaining a sufficiently large heating area.

[0059] Specifically, the inner diameter of the cylindrical spiral coil can be 100mm, 110mm, 115mm, 120mm, 130mm, 150mm, 200mm, 300mm, 400mm, 500mm or 800mm, etc.

[0060] The pitch between two adjacent cylindrical spiral coils is 10mm, 20mm, 30mm, 40mm, 50mm, 60mm, 70mm or 80mm, etc.

[0061] Figure 6 This is a structural schematic diagram of a heating device according to an embodiment of the present utility model, with reference to... Figure 6 The heating device provided in this embodiment includes a radio frequency power supply 300, an impedance matching device 200, and a heating electrode structure 100 provided in any embodiment of this utility model; the radio frequency power supply 300 is electrically connected to the impedance matching device 200, and the impedance matching device 200 is electrically connected to each columnar spiral coil in the heating electrode structure 100.

[0062] Specifically, the impedance matching device 200 is electrically connected to the first end of each columnar spiral coil in the heating electrode structure 100.

[0063] This embodiment provides a heating device that combines a heating electrode structure with an RF power supply and an impedance matching device to form a highly efficient and stable heating device. This device can achieve precise impedance matching and power control, significantly improving overall heating performance and process effects.

[0064] It should be understood that the various forms of the process shown above can be used, with steps reordered, added, or deleted. For example, the steps described in this utility model can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this utility model can be achieved, and this is not limited herein.

[0065] The specific embodiments described above do not constitute a limitation on the scope of protection of this utility model. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A heating electrode structure, characterized in that, include: At least two parallel-connected cylindrical helical coils formed by winding the same continuous metal wire; The first end of each of the columnar spiral coils is connected to receive radio frequency signals; The second end of each of the aforementioned cylindrical spiral coils is grounded; The columnar spiral coils are stacked in layers.

2. The heating electrode structure according to claim 1, characterized in that, All of the cylindrical spiral coils have the same number of turns and the same spiral direction.

3. The heating electrode structure according to claim 1, characterized in that, Each of the cylindrical spiral coils is coaxially arranged along the same central axis.

4. The heating electrode structure according to claim 1, characterized in that, The interior of the metal wire is hollow and is used to receive the cooling medium.

5. The heating electrode structure according to claim 4, characterized in that, The second end of each of the columnar spiral coils is reused as the cooling medium input end.

6. The heating electrode structure according to claim 5, characterized in that, It also includes conductive connection structures; The conductive connection structure includes a through hole; The metal wire passes through the through hole, and the inner wall of the through hole contacts the metal wire; The first end of each of the cylindrical spiral coils is located inside the through hole.

7. The heating electrode structure according to claim 3, characterized in that, The heating electrode structure contains two cylindrical spiral coils, namely a first cylindrical spiral coil and a second cylindrical spiral coil. The first end of the metal wire is the second end of the first columnar spiral coil, and the second end of the metal wire is the second end of the second columnar spiral coil; The first end of the first columnar spiral coil is connected to the first end of the second columnar spiral coil, and the line connecting the first end of the first columnar spiral coil and the first end of the second columnar spiral coil is parallel to the central axis of the columnar spiral coil.

8. The heating electrode structure according to claim 1, characterized in that, The cross-sectional shape of the columnar spiral coil is circular, elliptical, or polygonal.

9. The heating electrode structure according to any one of claims 1-8, characterized in that, The inner diameter of the cylindrical spiral coil ranges from 100mm to 1000mm; The spacing between two adjacent columnar spiral coil screws ranges from 10mm to 100mm.

10. A heating device, characterized in that, Includes a radio frequency power supply, an impedance matching device, and the heating electrode structure as described in any one of claims 1-9; The radio frequency power supply is electrically connected to the impedance matching device, and the impedance matching device is electrically connected to each of the columnar spiral coils in the heating electrode structure.

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