Magnetron tube core, magnetron and microwave oven

Abstract

The invention provides a magnetron tube core, a magnetron and a microwave oven, the magnetron tube core comprises an anode component, a cathode component, a magnetic pole component and an input and output component, the cathode component is inserted into the anode component from the bottom end of the anode component along the longitudinal axis direction of the anode component, and the magnetic pole component is inserted into the input and output component along the longitudinal axis direction of the anode component. The anode component comprises an anode cylinder, an isolation component and blades which are uniformly distributed in the angular direction, the number of the blades is ten, the blades are T-shaped, the ten blades are uniformly distributed on the inner wall of the anode cylinder in the angular direction in a radial shape, the input and output component comprises an output end shell and an input end shell, and the magnetic pole component comprises an upper magnetic pole and a lower magnetic pole. According to the magnetron tube core provided by the invention, the output power and efficiency of the magnetron can be improved, meanwhile, the material cost is reduced, and the market competitiveness of a product is improved.

Description

Technical Field

[0001] This invention relates to the field of magnetron technology, and more particularly to a magnetron die, a magnetron, and a microwave oven. Background Technology

[0002] A magnetron is a vacuum electronic device that uses orthogonal electromagnetic fields to make electrons move in a pendulum motion, thereby exciting microwave oscillations. Its core technology is based on a multi-cavity resonant structure, which achieves efficient energy conversion through electron emission from a cathode, axial magnetic field provided by a permanent magnet, and resonant cavities on a copper anode block.

[0003] Traditional magnetrons typically employ a uniformly distributed blade structure for their anodes, but this has significant drawbacks in practical applications: straight blades result in uneven electric field distribution in the interaction space, leading to low electron focusing efficiency; the connection between the blades and the anode cylinder has high thermal resistance, resulting in high operating temperatures and a tendency to cause cross-link deformation; and an unreasonable design of the number of blades can lead to insufficient suppression of high-frequency modes if there are too few, while a large number can lead to a decrease in power density. These defects severely restrict the reliability and efficiency of magnetrons. Summary of the Invention

[0004] To address the aforementioned issues, this invention proposes a magnetron core, the core of which lies in achieving a breakthrough improvement in electric field distribution, thermal management, and spectral stability through the synergistic optimization of the number of blades and the T-shaped structure.

[0005] Another object of the present invention is to provide a magnetron having the above-described magnetron core.

[0006] Another object of the present invention is to provide a microwave oven having the above-described magnetron.

[0007] A magnetron die includes an anode component, a cathode component, a magnetic pole component, and an input / output component. The cathode component is inserted into the anode component from its bottom end along the longitudinal axis. The anode component includes an anode cylinder, an isolation component, and ten blades evenly distributed angularly. The blades are T-shaped and are evenly distributed radially along the inner wall of the anode cylinder. The input / output component includes an output end shell and an input end shell. The magnetic pole component includes an upper magnetic pole and a lower magnetic pole.

[0008] Furthermore, a connecting rod is provided on the blade, and the isolation component is installed on the connecting rod of the T-shaped blade. The upper magnetic pole and the lower magnetic pole are respectively located at the top and bottom of the anode cylinder.

[0009] Furthermore, the T-shaped blade has an anode arc surface that extends radially from the inner wall of the anode cylinder to the interaction space, and the distance between the two sides of the T-shaped blade and the upper and lower magnetic poles is 1.5mm-2.0mm.

[0010] Furthermore, the distance g1 between the upper magnetic pole and the top end face of the T-shaped blade is 1.5mm to 1.8mm, and the distance g2 between the lower magnetic pole and the bottom end face of the T-shaped blade is 1.6mm to 2.0mm.

[0011] Furthermore, the width V between the T-shaped blade and the anode arc surface is 1.8mm-2.2mm, and the isolation component ring is embedded inside the connecting rod of the T-shaped blade.

[0012] Furthermore, the width h2 of the connecting rod is between 0.4 and 0.9 times the blade height H1, and the connecting rod is welded to the inner wall of the anode cylinder.

[0013] Furthermore, the height of the T-shaped blade anode radius portion is the blade height H1, the connecting anode cylinder portion is the width h2 of the connecting rod, and the isolation component is a large and small interlocking ring with a spacing of 1.3mm-2.4mm between them.

[0014] Furthermore, the diameter of the inscribed circle of the anode arc surface formed by the T-shaped blades is 8.6 mm to 9.8 mm.

[0015] The present invention also provides a magnetron, including a housing and a heat dissipation component disposed within the housing. The magnetron further includes the magnetron core described in any of the above technical solutions, and the height H1 of the T-shaped blade is the height of the blade at the anode arc surface.

[0016] The present invention also provides a microwave oven, the microwave oven including the above-described magnetron.

[0017] The beneficial technical effects of this invention are as follows:

[0018] The magnetron chip provided by this invention features T-shaped blades with uniform angular distribution. These T-shaped blades increase mode separation, preventing the magnetron from jumping to inefficient or unstable modes. Furthermore, they tune the resonant frequencies of all cavities to the desired operating frequency, thereby improving the magnetron's output power and efficiency while reducing material costs. The T-shaped blades also generate a more uniform electric field distribution within the interaction space, which is more conducive to electron aggregation and energy exchange. The uniform angular distribution of the blades ensures that all resonant cavities are identical in size and shape, and that they resonate at the same frequency, avoiding localized overheating and increasing power capacity. This invention sets the distance between the two sides of the T-shaped blades and the upper and lower magnetic poles to 1.2mm-2mm. This ensures sufficient magnetic field strength to allow electrons to form stable spokes, without being so strong as to hinder electrons from entering the interaction space or prematurely pull them back to the cathode. On the other hand, the distance between the blades and the upper and lower magnetic poles is 1.2mm-2mm. This provides sufficient distance to ensure a sufficiently strong magnetic field for electrons to form stable spokes, without being so strong as to hinder electrons from entering the interaction space or prematurely pull them back to the cathode. The inhomogeneity of the magnetic field at the edge of the magnetic pole interferes with the phase of electrons, disrupts synchronization, and leads to decreased efficiency and mode instability. Maintaining a safety gap effectively prevents high-voltage breakdown and ensures equipment safety. Welding the connecting rod to the inner wall of the anode cylinder ensures the connection strength between the connecting rod and the anode cylinder, reducing the probability of the blade falling off under prolonged high-temperature operation. Furthermore, the welded connection ensures the sealing performance between the anode section and the input and output end shells, guaranteeing that all microwaves within the anode section can be transmitted, preventing radiation leakage and improving product efficiency. The height of the T-shaped blade anode radius is set to the blade height. The isolation component is a large and small interlocking ring, fixed to the connecting rod with a spacing of 1.3-2.4 mm. The height of the T-shaped blade determines the equivalent capacitance, and the large and small interlocking rings physically block the direct transmission path of high-frequency current, maintaining a certain distance to prevent electromagnetic leakage and parasitic capacitance coupling. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a partial cross-sectional view of a magnetron die provided in an embodiment of the present invention;

[0021] Figure 2 This is a side view of the T-shaped blade provided in an embodiment of the present invention.

[0022] Explanation of reference numerals in the attached drawings: 10-Input / output component, 11-Output end shell, 12-Input end shell, 20-Cathode component, 30-Magnetic pole component, 31-Upper magnetic pole, 32-Lower magnetic pole, 40-Anode component, 41-Anode cylinder, 42-T-shaped blade, 43-Connecting rod of T-shaped blade, 44-Isolation component. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. 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 are within the scope of protection of the present invention.

[0024] On the one hand, the present invention provides a magnetron die, such as Figure 1 As shown, the magnetron die includes: an anode component 40, a cathode component 20, an input / output component 10, and a magnetic pole component. The input / output component 10 includes an output end shell 11 and an input end shell 12, and the magnetic pole component includes an upper magnetic pole 31 and a lower magnetic pole 32.

[0025] Specifically, the upper magnetic pole 31 is fixed to the upper end of the anode component 40 and has an upper groove recessed into the anode component 40; the lower magnetic pole 32 is fixed to the lower end of the anode component 40 and has a lower groove recessed into the anode component 40; the input end shell 12 is fixed to the lower end of the anode component 40 and supported on the lower magnetic pole 32; the output end shell 11 includes an upper tube shell and an upper plate, the upper plate is connected to the upper end of the anode component 40 and supported on the upper magnetic pole 31, and the upper tube shell and the upper plate... The connection is provided with an upper reinforcing part, which is supported on the groove wall of the upper groove; the cathode component 20 is inserted into the anode component 40 from the bottom end along the longitudinal axis of the anode component 40. The anode component 40 is composed of an anode cylinder 41, a T-shaped blade 42, a connecting rod 43 of the T-shaped blade 42, and an isolation component 44. The connecting rod 43 is welded to the anode cylinder 41. The upper magnetic pole 31 and the lower magnetic pole 32 are respectively located at the top and bottom ends of the anode cylinder 41.

[0026] In existing magnetron chips, the fan-shaped resonant cavity is the most common and mainstream blade shape design (especially in cost-sensitive applications such as household microwave ovens). Its structural characteristics are: the blades extend radially from the inner wall of the anode block, with a simple wedge-shaped cross-section. The width at the blade tip (near the cathode side) is usually greater than that at the root, and the sides are straight planes. Existing magnetron chips are prone to mode switching when operating conditions change, leading to a sharp drop in output power, frequency abrupt changes, reduced efficiency, and even potential damage to the magnetron or load. Furthermore, the electric field distribution at the tip of the fan-shaped cavity blades is not uniform, resulting in low energy conversion efficiency. The magnetron chip provided by this invention has an anode component 40 composed of an anode cylinder 41, an isolation component 44, and ten T-shaped blades 42 evenly distributed angularly. The T-shaped blades 42 improve the magnetron's output power and efficiency while reducing material costs, thereby increasing the product's market competitiveness. Simultaneously, the uniform angular distribution of the blades ensures that all resonant cavities are identical in size and shape, ensuring that the resonant cavities resonate at the same frequency, avoiding localized overheating and increasing power capacity.

[0027] In the above technical solution, the blades that are uniformly distributed in the angular direction are all T-shaped. The T-shaped blade 42 has an anode arc surface that extends radially from the inner wall of the anode cylinder 41 to the interaction space. The distance between the two sides of the T-shaped blade 42 and the upper magnetic pole 31 and the lower magnetic pole 32 is 1.5mm-2.0mm.

[0028] Specifically, the distance g1 between the top end face of the T-shaped blade 42 and the upper magnetic pole 31 is 1.5mm-1.8mm; the distance g2 between the bottom end face of the T-shaped blade 42 and the lower magnetic pole 32 is 1.6mm-2mm; as Figure 2 As shown, the T-shaped blade 42 includes a connecting rod 43 for the T-shaped blade. The width h2 of the connecting rod 43 is between 0.4 and 0.9 times the blade height H1. The connecting rod 43 is welded to the inner wall of the anode cylinder 41. The height of the anode radius portion of the T-shaped blade 42 is the blade height H1, and the portion connecting to the anode cylinder 41 is the width h2 of the connecting rod 43. The isolation component 44 is a large and small interlocking ring, which is fixed to the connecting rod 43. The spacing between the large and small interlocking rings is 1.3mm-2.4mm.

[0029] In this technical solution, the distance between the two sides of the T-shaped blade 42 and the upper and lower magnetic poles 31 and 32 is 1.2mm-2mm. On the one hand, maintaining a sufficient distance ensures a sufficiently strong magnetic field to allow electrons to form stable spokes, but it is not so strong as to hinder electrons from entering the interaction space or prematurely pull them back to the cathode. On the other hand, magnetic field inhomogeneity near the edge of the magnetic poles can interfere with the phase of electrons, disrupt synchronization, and lead to decreased efficiency and mode instability. At the same time, maintaining a safe gap can effectively prevent high-voltage breakdown and ensure equipment safety. The T-shaped blade has higher output power and efficiency, and lower processing costs, thereby increasing the product's market competitiveness.

[0030] Meanwhile, in this technical solution, the T-shaped blade 42 can increase the mode separation degree, prevent the magnetron from jumping to a mode with low efficiency or unstable frequency, and achieve high-efficiency output; and can tune the resonant frequency of all cavities to the desired operating frequency to achieve high power output; on the other hand, the T-shaped blade 42 can generate a more uniform or more favorable electric field distribution for electron aggregation and energy exchange in the interaction space.

[0031] In the above technical solution, the T-shaped blade 42 is provided with an isolation component 44, which consists of two sets of matching ring structures and is embedded inside the connecting rod 43 of the T-shaped blade 42.

[0032] Preferably, the width V between the T-shaped blade and the anode arc surface is 1.8mm-2.2mm. If the blade is too thin, the edge electric field is easily distorted, which leads to disordered electron movement paths, reduces energy conversion efficiency, and is prone to plastic deformation or fatigue fracture. If the blade is too thick, it reduces the effective space of the resonant cavity gap, weakens the high-frequency electric field strength, restricts the energy exchange between electrons and microwaves, and increases material costs.

[0033] In this technical solution, the connecting rod is welded to the inner wall of the anode cylinder. On the one hand, this ensures the connection strength between the connecting rod and the anode cylinder, reducing the probability of the blades falling off under long-term high-temperature working conditions. On the other hand, the welding connection method can ensure the sealing performance between the anode component and the input and output end shells, thereby ensuring that all microwaves inside the anode component can be transmitted out, preventing the danger of radiation leakage and improving the efficiency of product use.

[0034] In this technical solution, the height of the T-shaped blade 42 determines the size of the equivalent capacitance. The size interlocking loop physically blocks the direct transmission path of high-frequency current and maintains a certain distance to prevent electromagnetic leakage and parasitic capacitance coupling.

[0035] In the above technical solution, there are ten blades, and the ten blades are evenly distributed along the angular direction and are evenly distributed radially on the inner wall of the anode cylinder 41.

[0036] In this technical solution, ten blades are provided. Too few blades will lead to insufficient device efficiency, while too many blades will increase device cost, material cost, and manufacturing cost. A uniform angular distribution ensures that all resonant cavities resonate at the same frequency, guaranteeing the magnetron's operating efficiency and avoiding mode competition.

[0037] Preferably, the diameter of the inscribed circle of the anode arc surface formed by the T-shaped blades 42 is 8.6 mm to 9.8 mm.

[0038] In this technical solution, the anode arc surface is formed by extending radially from the inner wall of the anode cylinder 41 to the interaction space, and the anode blades are T-shaped structures that are evenly distributed in the inner corner of the anode cylinder 41.

[0039] Secondly, the present invention provides a magnetron, the magnetron including a housing and a heat dissipation component disposed within the housing, and further including the magnetron die described in any of the above technical solutions.

[0040] Thirdly, the present invention provides a microwave oven, which includes the magnetron described in the above technical solution.

[0041] In summary, the magnetron core provided by the present invention comprises an anode component 40 consisting of an anode cylinder 41, an isolation component 44, and ten T-shaped blades 42 evenly distributed along the angular direction. The blades evenly distributed along the angular direction are all T-shaped. The T-shaped blades 42 can improve the output power and efficiency of the magnetron while reducing material costs, thereby increasing the market competitiveness of the product.

[0042] In this invention, the term "multiple" refers to two or more unless otherwise explicitly defined. The terms "install," "connect," "link," and "fix" should be interpreted broadly. For example, "connect" can be a fixed connection, a detachable connection, or an integral connection; "link" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0043] In the description of this invention, it should be understood that the terms "upper" and "lower" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or unit referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0044] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A magnetron core, characterized in that, The magnetron die includes an anode component, a cathode component, a magnetic pole component, and an input / output component. The cathode component is inserted into the anode component from the bottom end along the longitudinal axis of the anode component. The anode component includes an anode cylinder, an isolation component, and ten blades evenly distributed angularly. The blades are T-shaped and are evenly distributed radially along the inner wall of the anode cylinder. The input / output component includes an output end shell and an input end shell. The magnetic pole component includes an upper magnetic pole and a lower magnetic pole.

2. The magnetron core according to claim 1, characterized in that, A connecting rod is provided on the blade, and the isolation component is installed on the connecting rod of the T-shaped blade. The upper magnetic pole and the lower magnetic pole are respectively located at the top and bottom of the anode cylinder.

3. The magnetron core according to claim 2, characterized in that, The T-shaped blade has an anode arc surface that extends radially from the inner wall of the anode cylinder to the interaction space. The distance between the two sides of the T-shaped blade and the upper and lower magnetic poles is 1.5mm-2.0mm.

4. The magnetron core according to claim 3, characterized in that, The distance g1 between the upper magnetic pole and the top end face of the T-shaped blade is 1.5mm to 1.8mm, and the distance g2 between the lower magnetic pole and the bottom end face of the T-shaped blade is 1.6mm to 2.0mm.

5. The magnetron die according to claim 3 or 4, characterized in that, The width V between the T-shaped blade and the anode arc surface is 1.8mm-2.2mm, and the isolation component ring is embedded inside the connecting rod of the T-shaped blade.

6. The magnetron die according to any one of claims 3 to 5, characterized in that, The width h2 of the connecting rod is between 0.4 and 0.9 times the blade height H1, and the connecting rod is welded to the inner wall of the anode cylinder.

7. The magnetron die according to claim 5 or 6, characterized in that, The height of the T-shaped blade anode radius portion is the blade height H1, the connecting anode cylinder portion is the width h2 of the connecting rod, and the isolation component is a large and small interlocking ring with a spacing of 1.3mm-2.4mm between them.

8. The magnetron core according to claim 1 or 2, characterized in that, The diameter of the inscribed circle of the anode arc surface formed by the T-shaped blades is 8.6 mm to 9.8 mm.

9. A magnetron, comprising a housing and a heat dissipation component disposed within the housing, characterized in that, The magnetron further includes the magnetron core as described in any one of claims 1 to 8, and the height H1 of the T-shaped blade is the height of the blade at the anode arc surface.

10. A microwave oven, characterized in that, The microwave oven includes the magnetron as described in claim 9.

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