Induction heating capacitor

Abstract

The invention relates to the technical field of capacitors, and provides an induction heating capacitor which comprises a core and a heat conduction support. Comprising a core and a heat-conducting bracket, the two cores are arranged at an interval, and the heat conduction support is arranged between the two cores, so that an interval space exists between the two cores; an oil hole structure is formed in the heat conduction support and used for allowing an impregnant to penetrate through the heat conduction support to circulate in the interval space. Compared with the prior art, the heat dissipation efficiency of the core is improved by arranging the heat conduction support, the temperature of the induction heating capacitor is effectively reduced, and then the service life of the induction heating capacitor is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of capacitors, and in particular to an induction heating capacitor. Background Art

[0002] High-voltage full-film capacitors for induction heating are mostly found in the metal smelting industry. Existing high-voltage full-film capacitors for induction heating usually have two cores stacked up and down, and the two cores are separated by a plywood (such as electrical paperboard), and a brass water pipe is set on the side wall of the core. When the brass water pipe is in operation, it is provided with circulating water inside, and an aluminum alloy shell is provided outside, and the shell is filled with an impregnant. When the output capacity is large during the operation of the capacitor, the heat generated by the core inside the capacitor will be high. The side wall of the core can be circulated with water and / or the impregnant can flow through the brass water pipe to dissipate heat and reduce the temperature of the side wall of the core. Since the two cores are stacked, and the overtime of, for example, electrical paperboard is used for spacing, the density of the paperboard is large, resulting in poor heat dissipation performance of the end faces where the two cores meet the paperboard, and the temperature remains high. The high temperature of the core will cause aging of the solid insulating material, such as damage to the end face of the core at the junction with the paperboard, which reduces the service life of the induction heating capacitor. Summary of the invention

[0003] The problem solved by the invention is how to improve the heat dissipation efficiency of the induction heating capacitor.

[0004] In order to solve the above problems, the present invention provides an induction heating capacitor.

[0005] In a first aspect, the present invention provides an induction heating capacitor, comprising a core and a heat-conducting bracket; It comprises a core and a heat-conducting bracket; the two cores are arranged at intervals, and the heat-conducting bracket is arranged between the two cores, so that there is an interval space between the two cores; The heat-conducting bracket is provided with an oil hole structure, and the oil hole structure is used for allowing the impregnating agent to pass through the heat-conducting bracket and flow in the spacing space; The thickness of the metal aluminum foil in the core is greater than 5 microns.

[0006] Optionally, the heat-conducting bracket is a rectangular box structure, and the oil hole structure includes a first oil hole, which is arranged through the rectangular box structure in a length direction.

[0007] Optionally, the oil hole structure further includes a second oil hole, and the second oil hole is arranged to penetrate along the height and / or width direction of the rectangular box structure.

[0008] Optionally, a plurality of sealed cavities are provided in the rectangular box structure, and heat transfer oil is provided in each of the sealed cavities.

[0009] Optionally, the heat-conducting bracket includes a plurality of first heat-conducting plates arranged at intervals along the length direction of the spacing space, the oil hole structure includes a first hole, each of the first heat-conducting plates is respectively provided with the first hole, and each of the first holes is coaxially arranged.

[0010] Optionally, the heat-conducting bracket further includes a plurality of second heat-conducting plates spaced apart along the width direction of the spacing space, the first heat-conducting plates are perpendicular to the second heat-conducting plates, the oil hole structure includes a second hole, and each of the second heat-conducting plates is respectively provided with the second hole.

[0011] Optionally, the first heat conducting plate and the second heat conducting plate are both hollow structures, and heat conducting oil is respectively disposed inside the first heat conducting plate and the second heat conducting plate.

[0012] Optionally, the thermally conductive bracket is made of aluminum nitride or aluminum oxide.

[0013] Optionally, the induction heating capacitor further comprises a heat dissipation water pipe, and the heat dissipation water pipe is respectively installed on the side walls of the two cores.

[0014] Optionally, the induction heating capacitor further comprises a shell, wherein the shell covers the core and the heat-conducting bracket, and the shell is filled with the impregnating agent.

[0015] The beneficial effect of the induction heating capacitor of the present invention is that a heat-conducting bracket is arranged between two cores so that there is a spacing space between the two cores, and an oil hole structure is opened on the heat-conducting bracket, and the oil hole structure is used for allowing the impregnating agent to pass through the heat-conducting bracket and flow in the spacing space, that is, from one side of the core, through the oil hole structure of the heat-conducting bracket to the other side of the core, so as to take away the heat of the end faces of the two cores facing the spacing space, and the heat-conducting bracket can conduct the heat of the core to the bracket through the part in contact with the core, and then the heat on the heat-conducting bracket is taken away by the impregnating agent, thereby further improving the heat dissipation of the capacitor. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The structure of the induction heating capacitor according to the embodiment of the present invention is shown in FIG. Figure 1 ; Figure 2 It is a structural schematic diagram of an induction heating capacitor in the prior art; Figure 3 This is a simulation result diagram of the induction heating capacitor in the prior art; Figure 4 This is a schematic structural diagram of a heat-conducting bracket according to an embodiment of the present invention; Figure 5 A structural cross-sectional view of a heat-conducting bracket according to an embodiment of the present invention; Figure 6A schematic structural diagram of another heat-conducting bracket according to an embodiment of the present invention; Figure 7 This is a diagram of the simulation results of the induction heating capacitor of this embodiment; Figure 8 The temperature variation trend diagram of the hottest point of the induction heating capacitor of this embodiment and the existing induction heating capacitor; Fig. 9 The average temperature variation trend diagram of the induction heating capacitor of this embodiment and the existing induction heating capacitor core; Fig.10 The maximum temperature variation trend diagram near the original damage point of the induction heating capacitor of this embodiment and the existing induction heating capacitor; Fig.11 The structure of the induction heating capacitor according to the embodiment of the present invention is shown in FIG. Figure 2 .

[0017] Description of reference numerals: 1- core; 2-heat-conducting bracket; 21-first oil hole; 22-second oil hole; 23-first heat-conducting plate; 231-first hole; 24-second heat-conducting plate; 241-second hole; 3- Radiator water pipe; 4- Shell. DETAILED DESCRIPTION

[0018] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. Although certain embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be interpreted as being limited to the embodiments described herein. On the contrary, these embodiments are provided to provide a more thorough and complete understanding of the present invention. It should be understood that the drawings and embodiments of the present invention are only for exemplary purposes and are not intended to limit the scope of protection of the present invention.

[0019] The term "including" and its variations used in this document are open inclusions, that is, "including but not limited to"; the term "based on" means "based at least in part on"; the term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one other embodiment"; the term "some embodiments" means "at least some embodiments"; the term "optionally" means "optional embodiments". The relevant definitions of other terms will be given in the following description. It should be noted that the concepts of "first", "second", etc. mentioned in the present invention are only used to distinguish different devices, modules or units, and are not used to limit the order or interdependence of the functions performed by these devices, modules or units.

[0020] It should be noted that the modifications of "one" and "plurality" mentioned in the present invention are illustrative rather than restrictive, and those skilled in the art should understand that, unless otherwise clearly indicated in the context, it should be understood as "one or more".

[0021] In the related art, commonly used induction heating capacitor structures are as follows Figure 2 As shown, for example, a capacitor of model RAM3.05-8682-0.7S includes two stacked cores 1 (each core 1 is rolled from multiple components), separated by a plywood (i.e., electrical paperboard), the main material of which is high-purity sulfate wood pulp, which has greater hardness and poorer thermal conductivity than components; the lead-out electrode in the capacitor is a brass water pipe, which contains circulating water when the capacitor is running; the shell 4 is made of aluminum alloy, and the shell 4 is filled with an impregnant, which flows between the core 1, the brass water pipe, and the shell 4. During the operation of the capacitor, the output capacity is large, resulting in high heat generation of the internal film of the capacitor. In addition, the operating place is usually in a cabinet, and the natural heat dissipation conditions are relatively poor, resulting in aging of the solid insulating material caused by the high temperature of the core 1 inside the capacitor, and may even cause damage to the capacitor and other devices. The service life and temperature of the induction heating capacitor follow the "octave rule", that is, for every 8°C increase in the working temperature of the internal medium of the capacitor, its service life is reduced by half. Therefore, improving the heat dissipation capacity of high-voltage full-film capacitors, their own heat resistance and improving the internal temperature distribution are the main considerations when improving the capacitor design.

[0022] In the existing induction heating capacitor structure, the core 1 can be cooled by circulating water in the brass water pipe, and the impregnating agent (such as benzyltoluene) transfers the heat of the core 1 to the shell 4 for heat dissipation. However, when the damaged capacitor was disassembled and inspected, it was found that the components near the middle clamping plate in the capacitor core 1 were still damaged.

[0023] Based on this, the temperature and impregnation agent flow in the capacitor are simulated, and the following results are obtained: Figure 3 The simulation results shown in the figure show that the middle sandwich panel is usually made of electrical paperboard, which has a high density and poor heat dissipation performance, resulting in a higher temperature at the contact part of the three parts than at other parts. Figure 3 The simulation results of the capacitor temperature condition shown in the middle figure (a) show that the temperature at the vulnerable point is the highest. Figure 3 The simulation results of the impregnant flow shown in the middle figure (b) show that the two cores 1 are stacked closely with the middle sandwich plate in between, and the impregnant can only flow in the larger space around the inside of the capacitor. There is almost no flow between the core 1 and the middle sandwich plate, resulting in the inability to dissipate heat and cool down this part through the flow of the impregnant. As the temperature rises, the withstand voltage of the components in the core 1 will also decrease, reducing the service life of the capacitor.

[0024] like Figure 1 As shown, in response to the problems existing in the above-mentioned related technologies, this embodiment provides an induction heating capacitor, including a core 1 and a heat-conducting bracket 2; the two cores 1 are arranged at intervals, and the heat-conducting bracket 2 is arranged between the two cores 1, so that there is a spacing space between the two cores 1; the heat-conducting bracket 2 is provided with an oil hole structure, and the oil hole structure is used for allowing the impregnating agent to pass through the heat-conducting bracket 2 and flow in the spacing space.

[0025] Specifically, the two cores 1 are stacked up and down and arranged at intervals, and the heat-conducting bracket 2 is arranged between the two cores 1 so that there is an interval space between the two cores 1. Among them, the heat-conducting bracket 2 is made of a material with high hardness, good thermal conductivity and insulation, such as silicon nitride, polycarbonate (PC) / thermal conductive polymer composite material, etc. An oil hole structure is opened on the heat-conducting bracket 2 to form an oil channel in the interval space between the two cores 1, which is conducive to natural convection of the impregnant in the middle part, so that the impregnant can pass through the heat-conducting bracket 2 and circulate in the interval space to take away the heat from the end faces of the two cores 1 facing the interval space, and cool the core 1. At the same time, the heat conduction can directly conduct heat to the core 1 in contact with it, transfer the heat to the bracket, and then the impregnant dissipates the heat.

[0026] In this embodiment, the thermally conductive bracket 2 is arranged between the two cores 1 so that there is a spacing space between the two cores 1, and an oil hole structure is opened on the thermally conductive bracket 2, and the oil hole structure is used for allowing the impregnating agent to pass through the thermally conductive bracket 2 and flow in the spacing space, and flow from one side of the core 1 through the oil hole structure of the thermally conductive bracket to the other side of the core 1, so as to take away the heat from the end faces of the two cores 1 facing the spacing space, and the thermally conductive bracket 2 can transfer the heat of the core 1 to the bracket through the part in contact with the core 1, and then the impregnating agent takes away the heat on the thermally conductive bracket 2, thereby further improving the heat dissipation of the capacitor.

[0027] Alternatively, if Figure 4 As shown, the heat-conducting support 2 is a rectangular box structure, and each end face thereof is a rectangular plane, wherein the upper end face and the lower end face are of the same shape as the end face of the core facing the heat-conducting support, and the upper end face and the lower end face are in close contact with the end face of the core 1 facing the heat-conducting support 2 to ensure the stability of the capacitor. The oil hole structure includes a first oil hole 21, which is arranged through the length direction of the rectangular box structure to form an oil channel for the impregnant to flow, and the impregnant flows in the oil channel to improve the heat dissipation of the core 1.

[0028] Alternatively, if Figure 5 As shown, Figure 5The middle figure is a front cross-sectional view of the heat-conducting bracket 2. The oil hole structure also includes a second oil hole 22. The second oil hole 22 is arranged to penetrate along the height and / or width direction of the rectangular box structure to increase the contact area between the impregnant and the heat-conducting bracket 2 and further improve the heat dissipation.

[0029] Optionally, a plurality of sealed cavities are provided in the rectangular box structure, and heat transfer oil is provided in each of the sealed cavities.

[0030] Specifically, Figure 5 As shown, the dotted line structure is a sealed cavity, which is filled with, for example, polystyrene (PS)-based, polyester-based synthetic oil, bio-based heat-conducting oil, etc. Compared with solid heat-conducting materials (such as the heat-conducting bracket 2 in this embodiment), liquid heat-conducting oil can better fill the gap between the heat-conducting bracket 2 and the object to be cooled, thereby increasing the contact area and heat transfer efficiency. In addition, the heat-conducting oil can also maintain good fluidity at different operating temperatures, helping to achieve uniform distribution of heat.

[0031] Existing induction heating capacitors are usually industrial frequency AC capacitors with large working voltage and current. When passing through the zero point of voltage or current, a certain amount of electric force will be generated. The hardness of the middle plate is relatively high, and the hardness of the components in contact with it is relatively soft. Under the continuous action of the electric force, certain mechanical damage will occur inside the components.

[0032] To solve the above problems, this embodiment further provides a heat-conducting bracket 2, the specific structure of which is as follows: Figure 6 As shown, the heat-conducting bracket 2 includes a plurality of first heat-conducting plates 23 arranged at intervals along the length direction of the interval space, the oil hole structure includes a first hole 231, each of the first heat-conducting plates 23 is provided with the first hole 231, and each of the first holes 231 is coaxially arranged. The heat-conducting bracket 2 also includes a plurality of second heat-conducting plates 24 arranged at intervals along the width direction of the interval space, the first heat-conducting plates 23 are perpendicular to the second heat-conducting plates 24, the oil hole structure includes a second hole 241, and each of the second heat-conducting plates 24 is provided with the second hole 241. The first heat-conducting plates 23 and the second heat-conducting plates 24 are provided to increase the support stability of the bracket, and the contact area with the core 1 is small to reduce the problem of component damage caused by the action of electric power. The first hole 231 is provided on the first heat-conducting plate 23, and the second hole 241 is provided on the second heat-conducting plate 24, to increase the natural convection of the impregnant in the space, and the contact area between the impregnant and the heat-conducting plate and the core 1, thereby increasing the heat dissipation.

[0033] Optionally, the first heat conducting plate 23 and the second heat conducting plate 24 are both hollow structures, and heat conducting oil is disposed inside the first heat conducting plate 23 and the second heat conducting plate 24, respectively. Improving contact area and heat transfer efficiency Optionally, the thermally conductive bracket 2 is made of aluminum nitride or aluminum oxide.

[0034] Specifically, aluminum nitride and aluminum oxide materials have high hardness, strong thermal conductivity, and good insulation. The thermal conductive bracket 2 is made of aluminum nitride or aluminum oxide materials. On the basis of ensuring insulation, the thermal conductive bracket 2 can ensure the stability of supporting the core 1 and good thermal conductivity.

[0035] Optionally, in the existing induction heating capacitor, the elements constituting the core 1 are usually made of insulating medium and metal film, such as polypropylene and aluminum foil film, and the thickness of the aluminum foil is usually 5 microns or less than 5 microns. In the embodiment of the present invention, the thickness of the aluminum foil is set to be greater than 5 microns, that is, the thickness of the aluminum foil is increased, so that the thermal conductivity of the element in the three directions of X, Y, and Z is changed, so that the heat generated by the aluminum foil body is reduced, thereby reducing the self-heating of the core 1.

[0036] It should be noted that the thickness of the aluminum foil in this embodiment can be 7 microns, 9 microns, 10 microns, 15 microns, etc., which is determined according to the size of the shell 4 or actual needs. In addition, when the thickness of the aluminum foil is greater than or equal to 10 microns, a pressing method is used to obtain the element to form the core 1, and when the thickness of the aluminum foil is less than 10 microns, a rolling method is used to obtain the element to form the core 1.

[0037] The thickness of the metal aluminum foil in the core 1 is set to be greater than 5 microns. The thickened aluminum foil reduces the self-heating of the aluminum foil body, thereby reducing the self-heating of the core 1. The embodiment of the present invention adopts the method of providing a heat-conducting bracket 2 and increasing the thickness of the aluminum foil to effectively reduce the temperature of the induction heating capacitor from the two aspects of improving the heat dissipation of the core 1 and reducing the self-heating of the core 1, thereby increasing the service life of the induction heating capacitor.

[0038] Alternatively, if Figure 1 As shown, the induction heating capacitor further includes a heat dissipation water pipe 3, which is respectively installed on the side walls of the two cores 1. When the capacitor is running, water circulates in the heat dissipation water pipe 3 to take away the heat inside the capacitor.

[0039] Alternatively, if Fig.11 As shown, the induction heating capacitor further comprises a shell 4, which is disposed on the core 1 and the heat-conducting bracket 2, and is filled with the impregnant to protect the internal structure of the capacitor.

[0040] In order to verify the operating effect of the inductive heating capacitor of this embodiment, the inductive heating capacitor of this embodiment and the existing inductive heating capacitor are simulated to obtain the following simulation results. The simulation related parameters and simulation electrical parameters are shown in Table 1: Table 1 Parameter comparison

[0041] It can be seen from Table 1 that the induction heating capacitor of the present invention can effectively reduce the current density and reduce the heat generated by the aluminum foil of the component itself.

[0042] (1) Impregnation agent flow and temperature The flow of the impregnating agent of the induction heating capacitor of this embodiment is as follows Figure 7 The middle figure (b) shows the flow of the impregnant in the existing induction heating capacitor. Figure 3 As shown in the middle figure (b), the temperature of the induction heating capacitor of this embodiment is as follows: Figure 7 The middle figure (a) shows the temperature of the existing induction heating capacitor. Figure 3 As shown in the middle figure (a), we can see that compared with Figure 3 Middle picture (b), Figure 7 In the middle figure (b), the impregnant has obvious flow at the middle bracket position, and the natural flow area of ​​the entire core 1 is larger than before the improvement. Figure 3 Middle picture (a), Figure 7 In the middle figure (a), the temperature of the original damaged part of core 1 dropped significantly.

[0043] (2) Hottest point temperature The hottest point temperature of the induction heating capacitor of this embodiment is different from the hottest point temperature of the conventional induction heating capacitor. Figure 8 As shown in Table 2, blank items in the table represent no data.

[0044] Table 2 Hottest point temperature and time

[0045] Figure 8 In the figure, curve ① represents the temperature variation trend of the hottest point of the existing induction heating capacitor, and curve ② represents the temperature variation trend of the hottest point of the induction heating capacitor of the present invention. Figure 8 It can be seen that the hottest point temperature (Tmax) of the induction heating capacitor of the present invention is lower than the hottest point temperature of the existing induction heating capacitor. The induction heating capacitor of the present invention greatly reduces the hottest point temperature, which is 9°C lower than that of NH, and it is more difficult to reach the upper limit of the component temperature. The component temperature and the withstand voltage show a negative correlation, so the induction heating capacitor of the present invention is stronger than the existing induction heating capacitor in terms of component withstand voltage.

[0046] At the same time, the thickening of the aluminum foil changes the thermal conductivity of the component in the three directions of X, Y, and Z, which reduces the heat generated by the aluminum foil body, thereby reducing the self-heating of the core 1. Therefore, the thermal conductivity of the component in the three directions of X, Y, and Z is also simulated, and the simulation results are shown in Table 3: Table 3 Anisotropic thermal conductivity of components

[0047] It can be seen that, compared with the existing induction heating capacitor, the thermal conductivity of the induction heating capacitor element of the present invention in the three directions of X, Y and Z is effectively improved.

[0048] (3) Average temperature of core 1 The average temperature of the core 1 of the induction heating capacitor of this embodiment is similar to the average temperature of the core 1 of the conventional induction heating capacitor. Fig. 9 As shown in Table 4, blank items in the table represent no data.

[0049] Table 4 Average temperature and time of core 1

[0050] The average temperature (Tave) here refers to the average temperature of all components after the product reaches stability. Fig. 9 In the figure, curve ① represents the average temperature variation trend of the conventional induction heating capacitor, and curve ② represents the average temperature variation trend of the induction heating capacitor of the present invention. Fig. 9 It can be seen from Table 4 that the average temperature of the induction heating capacitor of the present invention is lower than the average temperature of the existing induction heating capacitor.

[0051] From Table 4, it can be concluded that the average temperature of core 1 is about 5°C lower than that of NH and 3°C lower than that of NH1. It can also be seen that after the improvement, the temperature distribution of the whole core 1 is more uniform, and the internal temperature difference is reduced, which also explains why the flow velocity of the internal impregnant is weakened.

[0052] (4) Temperature of the original damage point The original damage point temperature of the core 1 of the induction heating capacitor of this embodiment and the original damage point temperature of the core 1 of the existing induction heating capacitor are as follows: Fig.10 As shown in Table 5, blank items in the table represent no data.

[0053] Table 5 Changes in the maximum temperature near the original damage point

[0054] Fig.10 In the figure, curve ① represents the maximum temperature variation trend near the original damage point of the existing induction heating capacitor, and curve ② represents the maximum temperature variation trend near the original damage point of the induction heating capacitor of the present invention. Fig.10 It can be seen that the temperature change near the damage point clearly shows that the temperature of the damage point of the induction heating capacitor of the present invention has dropped significantly to 70°C, which is nearly 17.6% lower than that before improvement. Figure 5From the above table 5 and Table 5, it can be seen that due to the natural convection of the impregnant of the components near the heat-conducting bracket 2, part of the heat is taken away, and the temperature is significantly reduced. For the full-film capacitor, the lower the temperature, the stronger the withstand voltage. Fig.10 The data show that after changing the internal structure of the product and thickening the aluminum foil, the temperature of the components near the heat-conducting bracket 2 is significantly reduced. It is precisely because of this change that the stability of product operation is improved.

[0055] Although the present invention is disclosed as above, the protection scope of the present invention is not limited thereto. Those skilled in the art may make various changes and modifications without departing from the spirit and scope of the present invention, and these changes and modifications will fall within the protection scope of the present invention.

Claims

1. An induction heating capacitor, characterized in that: It comprises a core (1) and a heat-conducting bracket (2); The two cores (1) are arranged at a distance, and the heat-conducting bracket (2) is arranged between the two cores (1), so that there is a spacing space between the two cores (1); An oil hole structure is provided on the heat-conducting bracket (2), and the oil hole structure is used for allowing the impregnating agent to pass through so as to flow in the spacing space.

2. The induction heating capacitor according to claim 1, characterized in that: The heat-conducting bracket (2) is a rectangular box structure, and the oil hole structure comprises a first oil hole (21), wherein the first oil hole (21) is arranged to penetrate along the length direction of the rectangular box structure.

3. The induction heating capacitor according to claim 2, characterized in that: The oil hole structure further comprises a second oil hole (22), the second oil hole (22) being arranged to penetrate along the height and / or width direction of the rectangular box structure.

4. The induction heating capacitor according to claim 2, characterized in that: A plurality of sealed cavities are arranged in the rectangular box structure, and heat transfer oil is arranged in each of the sealed cavities.

5. The induction heating capacitor according to claim 1, characterized in that: The heat-conducting bracket (2) comprises a plurality of first heat-conducting plates (23) arranged at intervals along the length direction of the spacing space, the oil hole structure comprises a first hole (231), each of the first heat-conducting plates (23) is provided with a first hole (231), and each of the first holes (231) is coaxially arranged.

6. The induction heating capacitor according to claim 5, characterized in that: The heat-conducting bracket (2) further comprises a plurality of second heat-conducting plates (24) arranged at intervals along the width direction of the spacing space, the first heat-conducting plates (23) are perpendicular to the second heat-conducting plates (24), the oil hole structure comprises a second hole (241), and each of the second heat-conducting plates (24) is respectively provided with a second hole (241).

7. The induction heating capacitor according to claim 6, characterized in that: The first heat conducting plate (23) and the second heat conducting plate (24) are both hollow structures, and heat conducting oil is respectively provided inside the first heat conducting plate (23) and the second heat conducting plate (24).

8. The induction heating capacitor according to claim 1, characterized in that: The heat-conducting bracket (2) is made of aluminum nitride or aluminum oxide material.

9. The induction heating capacitor according to claim 1, characterized in that: The thickness of the metal aluminum foil in the core (1) is greater than 5 microns.

10. The induction heating capacitor according to claim 1, characterized in that: The induction heating capacitor further comprises a heat dissipation water pipe (3), wherein the heat dissipation water pipe (3) is respectively installed on the side walls of the two cores (1); The induction heating capacitor further comprises a shell (4), wherein the shell (4) is disposed on the core (1) and the heat-conducting support (2), and the shell (4) is filled with the impregnating agent.

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