Microwave generating device and household appliance

Abstract

The application discloses a microwave generating device and a household appliance. The microwave generating device comprises an anode cylinder and a magnetic pole assembly. The magnetic pole assembly comprises an upper magnetic pole and a lower magnetic pole. The upper magnetic pole is arranged at one end of the anode cylinder, and the lower magnetic pole is arranged at the other end of the anode cylinder. The upper magnetic pole comprises a first ring part and a first extension part which is formed by extending outward from the inner ring side of the first ring part at a first angle. The end of the first extension part away from the first ring part forms a first through hole with a first diameter. The lower magnetic pole comprises a second ring part and a second extension part which is formed by extending outward from the inner ring side of the second ring part at a second angle. The end of the second extension part away from the second ring part forms a second through hole with a second diameter. The first extension part and the second extension part are arranged opposite along the axial direction of the anode cylinder. The first angle is greater than the second angle, and the first diameter is greater than the second diameter. The microwave generating device can improve the noise problem of the magnetron and is beneficial to improving the output efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of microwave technology, in particular to a microwave generating device and a household appliance. BACKGROUND

[0002] A magnetron is a vacuum electron tube for generating microwaves. In the related art, while the output efficiency of the magnetron is improved, it is often difficult to effectively suppress the noise of the magnetron, resulting in that the microwave application device cannot pass the relevant test of electromagnetic compatibility. SUMMARY

[0003] Embodiments of the present application provide a microwave generating device and a household appliance.

[0004] The microwave generating device provided by the embodiments of the present application comprises an anode cylinder and a magnetic pole assembly, the magnetic pole assembly comprises an upper magnetic pole and a lower magnetic pole, the upper magnetic pole is arranged at one end of the anode cylinder, the lower magnetic pole is arranged at the other end of the anode cylinder, the upper magnetic pole comprises a first ring part and a first extension part extending outward at a first angle from the inner ring side of the first ring part, the end of the first extension part away from the first ring part forms a first through hole with a first diameter, the lower magnetic pole comprises a second ring part and a second extension part extending outward at a second angle from the inner ring side of the second ring part, the end of the second extension part away from the second ring part forms a second through hole with a second diameter; the first extension part and the second extension part are arranged opposite along the axial direction of the anode cylinder, the first angle is greater than the second angle, and the first diameter is greater than the second diameter.

[0005] The microwave generating device can optimize the electromagnetic field in the interaction space in the microwave generating device, reduce the fluctuation of the electromagnetic field, and make the electrons in the whole interaction space maintain a constant drift speed, so that the noise problem of the magnetron can be improved, and the output efficiency of the microwave generating device can be improved.

[0006] In some embodiments, the center of the first through hole and the center of the second through hole are located on the axis of the anode cylinder.

[0007] In some embodiments, the angle ratio of the first angle and the second angle ranges from 1.08 to 1.2, and the diameter ratio of the first diameter and the second diameter ranges from 1.04 to 1.13.

[0008] In some embodiments, the first angle is 70 degrees, the second angle is 65 degrees, the first diameter is 9.6 millimeters, and the second diameter is 9.2 millimeters.

[0009] In some embodiments, the first angle is 74 degrees, the second angle is 65 degrees; the first diameter is 10 mm, and the second diameter is 9.2 mm.

[0010] In some embodiments, the first angle is 78 degrees, the second angle is 65 degrees; the first diameter is 10.4 mm, and the second diameter is 9.2 mm.

[0011] In some embodiments, the microwave generating device comprises a tube core, the tube core comprises an anode component, a cathode component, the magnetic pole assembly and an output component, the anode component comprises a plurality of blades, the anode cylinder and an antenna, the plurality of blades are connected to the inner side wall of the anode cylinder, and the plurality of blades are arranged along the circumference of the anode cylinder; the cathode component is arranged along the axial direction of the anode cylinder and is arranged inside the anode cylinder; the output component is connected to the lower magnetic pole, the antenna penetrates through the lower magnetic pole, one end of the antenna is connected to one of the plurality of blades, and the other end of the antenna is connected to the output component.

[0012] In some embodiments, the microwave generating device comprises a shell and a heat dissipation assembly, the tube core is accommodated in the shell, and the heat dissipation assembly is arranged between the shell and the tube core.

[0013] In some embodiments, the microwave generating device comprises an input power supply assembly, the input power supply assembly is connected to the shell and is arranged close to the upper magnetic pole along the axial direction of the anode cylinder.

[0014] The embodiments of the present application provide a household appliance, which comprises a cavity and the microwave generating device according to any one of the above-mentioned embodiments, and the microwave generating device is arranged in the cavity.

[0015] In the above-mentioned household appliance, when the first angle is greater than the second angle and the first diameter is greater than the second diameter, the electromagnetic field in the interaction space in the microwave generating device can be optimized, the fluctuation of the electromagnetic field is reduced, the electrons in the whole interaction space can maintain a constant drift speed, and thus the noise problem of the magnetron can be improved, and the output efficiency of the microwave generating device can be improved.

[0016] Additional aspects and advantages of the present application will be made apparent from the following description. BRIEF DESCRIPTION OF DRAWINGS

[0017] The above and / or additional aspects and advantages of the present application will become apparent and be readily understood from the following description, taken in conjunction with the accompanying drawings, in which:

[0018] Figure 1is the main wave waveform diagram of the magnetron in the related art;

[0019] Figure 2 is a partial structure diagram of the microwave generating device according to an embodiment of the present application;

[0020] Figure 3 is the main wave waveform diagram of the microwave generating device according to the first embodiment of the present application;

[0021] Figure 4 is the main wave waveform diagram of the microwave generating device according to the second embodiment of the present application;

[0022] Figure 5 is the main wave waveform diagram of the microwave generating device according to the third embodiment of the present application;

[0023] Figure 6 is another partial structure diagram of the microwave generating device according to an embodiment of the present application;

[0024] Figure 7 is still another partial structure diagram of the microwave generating device according to an embodiment of the present application;

[0025] Figure 8 is a structure diagram of the household appliance according to an embodiment of the present application.

[0026] Main element symbol explanation:

[0027] Microwave generating device 100, household appliance 200, cavity 201;

[0028] Tube core 10, anode component 20, anode cylinder 21, blade 22, antenna 23, first cross connecting ring 24, second cross connecting ring 25, cathode component 30, support rod assembly 31, filament 32, magnetic pole assembly 40, upper magnetic pole 41, first ring part 42, first extension part 43, first through hole 44, lower magnetic pole 45, second ring part 46, second extension part 47, second through hole 48, output component 50, shell 60, heat dissipation assembly 70, support 71, input power supply assembly 80. DETAILED DESCRIPTION

[0029] Embodiments of the present application are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by reference to the drawings are exemplary only, and are used only for the purpose of explaining the present application, and should not be understood as limiting the present application.

[0030] In the description of the present application, the terms "first", "second" are only for descriptive purpose, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly specified and limited.

[0031] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected. It can be mechanical connection, or electrical connection. It can be directly connected, or indirectly connected through intermediate medium, or internal communication of two elements or interaction relationship between two elements. 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.

[0032] In the present application, many different embodiments or examples are provided to realize different structures of the present application. In order to simplify the disclosure of the present application, the components and arrangements of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present application. In addition, the present application can repeatedly refer to numbers and / or letters in different examples. Such repetition is for the purpose of simplification and clarity, and in itself does not indicate the relationship between the various embodiments and / or arrangements discussed. In addition, the present application provides examples of various specific processes and materials, but those skilled in the art can realize the application of other processes and / or the use of other materials.

[0033] Microwaves can be used to heat articles (such as food). Specifically, in the related art, after generating microwaves, the microwaves can be guided into a closed cavity, so that the water in the objects in the closed cavity can absorb the microwaves to generate heat, thereby achieving the function of heating.

[0034] For the microwave generating device 100 of the present application, in one embodiment, it can be a magnetron. It can be understood that the magnetron can have the characteristics of high oscillation efficiency and large microwave output power, and therefore can be widely used in household microwave ovens, industrial microwave heating equipment and other microwave application equipment.

[0035] In the related art, in order to ensure good safety, stability and use effect, the magnetron needs to be tested for electromagnetic compatibility (EMC test). For the magnetron, in the case of increasing its output efficiency, it is easy to produce noise of fundamental frequency adjacent band and high order harmonic. Please refer to Figure 1 ,Figure 1 The figure shows the correspondence between the frequency and the harmonic level of the magnetron in the related art. Among them, Figure 1 The working frequency band (which can be understood as the fundamental wave) of the magnetron in the embodiment is 2.4GHz to 2.5GHz, the peak corresponds to a working frequency of 2.447GHz, and the harmonic level is 110dBV / m. In the EMC test, the harmonic level corresponding to the frequency band outside the working frequency band needs to be less than 80dBV / m. From Figure 1 It can be seen that there are harmonics with harmonic levels greater than 80dBV / m in the frequency band less than 2.4GHz adjacent to the fundamental wave, which will cause the EMC test to fail, and thus cannot guarantee sufficient safety, stability and use effect.

[0036] In summary, when improving the output efficiency of the microwave generating device, although the corresponding fundamental wave can have good output effect, noise will be generated in the frequency band adjacent to the fundamental wave and high-order harmonics, which will affect the overall working effect.

[0037] Please refer to Figure 2 The microwave generating device 100 includes an anode cylinder 21 and a magnetic pole assembly 40. The magnetic pole assembly 40 includes an upper magnetic pole 41 and a lower magnetic pole 45. The upper magnetic pole 41 is arranged at one end of the anode cylinder 21, and the lower magnetic pole 45 is arranged at the other end of the anode cylinder 21. The upper magnetic pole 41 includes a first ring portion 42 and a first extension portion 43 extending outward from the inner ring side of the first ring portion 42 at a first angle K1. The end of the first extension portion 43 away from the first ring portion 42 forms a first through hole 44 with a first diameter K2. The lower magnetic pole 45 includes a second ring portion 46 and a second extension portion 47 extending outward from the inner ring side of the second ring portion 46 at a second angle A1. The end of the second extension portion 47 away from the second ring portion 46 forms a second through hole 48 with a second diameter A2. The first extension portion 43 and the second extension portion 47 are arranged opposite to each other along the axial direction of the anode cylinder 21. The first angle K1 is greater than the second angle A1. The first diameter K2 is greater than the second diameter A2.

[0038] The microwave generating device 100 described above, in the case where the first angle K1 is greater than the second angle A1 and the first diameter K2 is greater than the second diameter A2, can optimize the electromagnetic field in the interaction space inside the microwave generating device 100, reduce the fluctuation of the electromagnetic field, and make the electrons in the entire interaction space maintain a constant drift speed, thereby improving the noise problem of the magnetron and facilitating the improvement of the output efficiency of the microwave generating device 100.

[0039] Specifically, in the illustrated embodiment, the upper magnetic pole 41 and the lower magnetic pole 45 are respectively arranged at two ends of the anode cylinder 21 and opposite to each other, so that a gap is formed between the upper magnetic pole 41 and the lower magnetic pole 45, and in the case that the microwave generating device 100 generates microwaves, the gap between the upper magnetic pole 41 and the lower magnetic pole 45 generates corresponding electric field and magnetic field, and further forms an interaction space, and the electrons in the interaction space are subjected to the action of both the electric field and the magnetic field and generate movement.

[0040] On the basis of the above, by respectively changing the overall structure of the upper magnetic pole 41 and the lower magnetic pole 45, so that the first angle K1 formed by the first extension part 43 extending outward on the first ring part 42 is greater than the second angle A1 formed by the second extension part 47 extending outward on the second ring part 46, and the first diameter K2 of the first through hole 44 formed on the first extension part 43 is greater than the second diameter A2 of the second through hole 48 formed on the second extension part 47, so that the upper magnetic pole 41 and the lower magnetic pole 45 are in an asymmetric structure, and the electric field and the magnetic field in the interaction space can be optimally matched, so that the interaction space satisfies that the ratio of the electric field intensity and the magnetic induction intensity is a relatively constant value, reduces the fluctuation generated by the electrons when moving, and further makes the drift speed of the electrons moving in the interaction space along the circumference of the anode cylinder 21 remain constant, which is beneficial to reduce the noise generated in the adjacent frequency band of the fundamental wave and the high-order harmonic wave.

[0041] Please refer to Figure 2 In some embodiments, the center of the first through hole 44 and the center of the second through hole 48 are located on the axis L of the anode cylinder 21. It can be understood that on the basis of the above, the overall structure of the microwave generating device 100 can be adjusted, so that the electric field and the magnetic field in the interaction space in the anode cylinder 21 can be uniformly distributed around the axis of the anode cylinder 21. In this way, the electric field and the magnetic field can be optimally matched.

[0042] In some embodiments, the angle ratio of the first angle K1 and the second angle A1 ranges from [1.08, 1.2]. The diameter ratio of the first diameter K2 and the second diameter A2 ranges from [1.04, 1.13].

[0043] The present application will be described in detail by the following specific examples with the attached drawings.

[0044] Example one:

[0045] Please refer to Figure 2The first angle K1 formed by the first extension 43 extending outwardly from the inner ring side of the first ring portion 42 is 70 degrees. The second angle A1 formed by the second extension 47 extending outwardly from the inner ring side of the second ring portion 46 is 65 degrees. The first diameter K2 of the first through hole 44 formed on the first extension 43 is 9.6 millimeters. The second diameter A2 of the second through hole 48 formed on the second extension 47 is 9.2 millimeters. The angle ratio of the first angle K1 and the second angle A1 is 1.08, and the diameter ratio of the first diameter K2 and the second diameter A2 is 1.04.

[0046] On the basis of the above, please refer to Figure 3 , Figure 3 The main wave waveform diagram of the microwave generating device 100 of Example One is shown in FIG. 1, wherein the working frequency band of the microwave generating device 100 is 2.4 GHz to 2.5 GHz, the working frequency corresponding to the main wave peak value is 2.451 GHz, and the harmonic level is 108.92 dBV / m. From Figure 3 It can be obtained that the harmonic levels of the noise generated outside the working frequency band are less than 80 dBV / m.

[0047] Example Two:

[0048] Please refer to Figure 2 The first angle K1 formed by the first extension 43 extending outwardly from the inner ring side of the first ring portion 42 is 74 degrees. The second angle A1 formed by the second extension 47 extending outwardly from the inner ring side of the second ring portion 46 is 65 degrees. The first diameter K2 of the first through hole 44 formed on the first extension 43 is 10 millimeters. The second diameter A2 of the second through hole 48 formed on the second extension 47 is 9.2 millimeters. The angle ratio of the first angle K1 and the second angle A1 is 1.12, and the diameter ratio of the first diameter K2 and the second diameter A2 is 1.09.

[0049] On the basis of the above, please refer to Figure 4 , Figure 4 The main wave waveform diagram of the microwave generating device 100 of Example Two is shown in FIG. 2, wherein the working frequency band of the microwave generating device 100 is 2.4 GHz to 2.5 GHz, the working frequency corresponding to the main wave peak value is 2.453 GHz, and the harmonic level is 104.95 dBV / m. From Figure 3 It can be obtained that the harmonic levels of the noise generated outside the working frequency band are less than 80 dBV / m.

[0050] Example Three:

[0051] Please refer to Figure 2The first angle K1 formed by the first extension 43 extending outwardly from the inner ring side of the first ring portion 42 is 78 degrees. The second angle A1 formed by the second extension 47 extending outwardly from the inner ring side of the second ring portion 46 is 65 degrees. The first diameter K2 of the first through hole 44 formed on the first extension 43 is 10.4 millimeters. The second diameter A2 of the second through hole 48 formed on the second extension 47 is 9.2 millimeters. The angle ratio of the first angle K1 and the second angle A1 is 1.2, and the diameter ratio of the first diameter K2 and the second diameter A2 is 1.13.

[0052] On the basis of the above, Figure 5 , Figure 5 Figure 3 shows the main wave waveform diagram of the microwave generating device 100 of Example Three, wherein the working frequency band of the microwave generating device 100 is 2.4GHz to 2.5GHz, the working frequency corresponding to the main wave peak value is 2.447GHz, and the harmonic level is 105.42dBV / m. From Figure 3 It can be seen that the harmonic levels of the noise generated outside the working frequency band are less than 80dBV / m.

[0053] In summary, the microwave generating device 100 in Examples One to Three can meet the conditions in the following table:

[0054]

[0055] On the basis of the ranges of the angle ratio of the first angle K1 and the second angle A1 and the diameter ratio of the first diameter K2 and the second diameter A2 given in the embodiments, the main wave waveform of the microwave generating device 100 when working in the working frequency band can be improved, the main wave test requirements can be met, the main wave waveform is more concentrated in the working frequency band, which is conducive to suppressing noise, improving the main wave pass rate (which can reach 90%), and improving the high-end radiation pass rate (which can reach 100%).

[0056] Of course, on the basis of the above embodiments, those skilled in the art can set the first angle K1, the second angle A1, the first diameter K2 and the second diameter A2 to other values, so as to achieve the same or at least similar technical effects as the above embodiments. The specific values of the above parameters in other embodiments are not limited here.

[0057] Please refer to Figure 6 and Figure 7In some embodiments, the microwave generating device 100 can include the tube core 10. The tube core 10 can include the anode component 20, the cathode component 30, the magnetic pole assembly 40, and the output component 50. The anode component 20 can include a plurality of blades 22, an anode cylinder 21, and an antenna 23. The plurality of blades 22 can be connected to the inner side wall of the anode cylinder 21. The plurality of blades 22 can be spaced apart along the circumference of the anode cylinder 21. The cathode component 30 can be disposed along the axis L of the anode cylinder 21 at the inner side of the anode cylinder 21. The output component 50 can be connected to the lower magnetic pole 45. The antenna 23 can pass through the lower magnetic pole 45. One end of the antenna 23 can be connected to one of the plurality of blades 22, and the other end of the antenna 23 can be connected to the output component 50. In this way, the electrons can be transported into the interaction space to generate microwaves.

[0058] Specifically, in the embodiments shown in Figure 6 and Figure 7 , the plurality of blades 22 are uniformly spaced apart around the axis of the anode cylinder 21 and disposed at the inner side of the anode cylinder 21, and the cathode component 30 is disposed along the axis L of the anode cylinder 21 at the inner side of the anode cylinder 21, such that one end of each blade 22 is connected to the inner side wall of the anode cylinder 21 and the other end is disposed opposite the cathode component 30. In the case that the microwave generating device 100 generates microwaves, an electric field can be formed in the space at the inner side of the anode cylinder 21 by the plurality of blades 22 connected to the anode cylinder 21 and the cathode component 30 disposed at the inner side of the anode cylinder 21; a magnetic field can be formed in the space at the inner side of the anode cylinder 21 by the upper magnetic pole 41 and the lower magnetic pole 45 disposed at both ends of the anode cylinder 21, and thus the electrons can be generated and moved into the interaction space to generate microwaves, and the microwaves can be guided to the output component 50 by the antenna 23 connected to the blades 22, achieving the effect of emitting microwaves through the output component 50.

[0059] For the cathode component 30, please refer to Figure 6 , in the embodiments shown in Figure 6 , the cathode component 30 can include a support rod assembly 31 and a filament 32. The filament 32 can be spirally disposed around the support rod assembly 31. The support rod assembly 31 can be connected with a shielding cap (not shown). The shielding cap can be disposed on the support rod assembly 31 at both ends of the filament 32 along the axis L of the anode cylinder 21, so that in the case that the filament 32 is powered to generate electrons, the movement of the electrons along the axis of the anode cylinder 21 can be limited by the shielding cap (i.e., the axial scattering of the electrons is suppressed).

[0060] In other embodiments, the distance between the vane 22 and the filament 32 can be adjusted according to specific conditions, so as to adjust the electric field generated in the interaction space. The distance between the vane 22 and the filament 32 refers to the distance between the vane 22 and the filament 32 along the radial direction of the anode cylinder 21. When the distance between the vane 22 and the filament 32 increases, the electric field strength of the electric field generated in the interaction space decreases, and when the distance between the vane 22 and the filament 32 decreases, the electric field strength of the electric field generated in the interaction space increases. The correspondence between the distance between the vane 22 and the filament 32 and the electric field strength of the electric field generated in the interaction space can be linear or nonlinear. In an embodiment, by reducing the distance between the vane 22 and the filament 32, the high-frequency field efficiency in the interaction space can be increased, so that the electrons generated by the filament 32 can more effectively participate in energy exchange, thereby effectively improving the output efficiency.

[0061] For the antenna 23, please refer to Figure 6 In other embodiments, the antenna 23 can be connected to the vane 22 by welding, clamping, threaded connection, interference connection, etc.

[0062] For the magnetic pole assembly 40, the distance from the first through hole 44 to the end surface of the vane 22 along the axis L can be the same as or different from the distance from the second through hole 48 to the end surface of the vane 22 along the axis L. In an embodiment, the distance from the first through hole 44 to the end surface of the vane 22 along the axis L is in the range of [1.3, 1.5] millimeters, and the distance from the second through hole 48 to the end surface of the vane 22 along the axis L is in the range of [1.3, 1.5] millimeters.

[0063] In other embodiments, the number of vanes 22 is an even multiple. In an embodiment, the number of vanes 22 is 10.

[0064] Please refer to Figure 6 In some embodiments, the anode component 20 can include a first cross-link ring 24 and a second cross-link ring 25. The first cross-link ring 24 and the second cross-link ring 25 can sequentially connect a plurality of vanes 22 along the circumferential direction of the anode cylinder 21, and the diameter of the first cross-link ring 24 is greater than the diameter of the second cross-link ring 25.

[0065] Specifically, in Figure 6In the embodiment shown, the diameter of the first cross-linking ring 24 is greater than the diameter of the second cross-linking ring 25, so that a gap is formed between the first cross-linking ring 24 and the second cross-linking ring 25. It can be understood that by arranging the first cross-linking ring 24 and the second cross-linking ring 25, the frequency interval between the working mode and the adjacent interference mode can be effectively increased, so that the frequency interval between the working mode and the adjacent interference mode can be brought to a reasonable range, thereby effectively reducing the unnecessary noise emitted by the die 10 when it is working. In one embodiment, the ratio of the diameter of the first cross-linking ring 24 to the diameter of the second cross-linking ring 25 is in the range of [1.1, 1.3]. In another embodiment, the gap between the first cross-linking ring 24 and the second cross-linking ring 25 is 1.2 mm.

[0066] In addition, in Figure 7 In the embodiment shown, a first cross-linking ring 24 and a second cross-linking ring 25 are connected to one end surface of the blade 22 along the axis L, and another first cross-linking ring 24 and another second cross-linking ring 25 are connected to the other end surface of the blade 22 along the axis L. In other embodiments, the number of the first cross-linking ring 24 and the second cross-linking ring 25 and the connection position with the blade 22 can be determined according to specific circumstances. The first cross-linking ring 24 can be connected to the blade 22 by welding, clamping, fitting connection, interference connection, etc., and the second cross-linking ring 25 can be connected to the blade 22 by welding, clamping, fitting connection, interference connection, etc., which can be determined according to specific circumstances or calibrated by actual test, and is not specifically limited here.

[0067] Please refer to Figure 7 In some embodiments, the microwave generating device 100 can include a shell 60 and a heat dissipation assembly 70. The die 10 can be accommodated in the shell 60. The heat dissipation assembly 70 can be arranged between the shell 60 and the die 10. In this way, the heat dissipation effect of the die 10 can be achieved.

[0068] Specifically, in Figure 6 In the embodiment shown, the heat dissipation assembly 70 includes a plurality of supports 71. One end of the support 71 is connected to the outer side wall of the anode cylinder 21, and the other end is connected to the inner side wall of the shell 60, so that the heat generated in the die 10 can be transmitted to the shell 60 through the plurality of supports 71, achieving the heat dissipation effect of the die 10.

[0069] Please refer to Figure 7 and Figure 8In some embodiments, the microwave generating device 100 can comprise an input power supply assembly 80. The input power supply assembly 80 can be connected to the housing 60 and disposed adjacent to the upper magnetic pole 41 in the axial direction of the anode cylinder 21. It can be understood that, in the case that the input power supply assembly 80 supplies power to the cathode component 30 and the anode component 20, an electric field can be generated between the cathode component 30 and the anode component 20. Thus, the electric field can be generated by the input power supply assembly 80.

[0070] It can be understood that, according to the description of the foregoing embodiments, the microwaves generated by the microwave generating device 100 can be used to heat objects (e.g., food). On this basis, the microwaves can be guided into the cavity 201 of the household appliance 200, so that the food placed in the cavity 201 can be heated, achieving the function of heating food. The microwave generating device 100 can be a magnetron. The household appliance 200 can be a microwave oven. ​

[0071] The household appliance 200 described above, in the case that the first angle K1 is greater than the second angle A1 and the first diameter K2 is greater than the second diameter A2, can optimize the electromagnetic field in the interaction space in the microwave generating device 100, reduce the fluctuation of the electromagnetic field, so that the electrons in the entire interaction space can maintain a constant drift speed, thereby improving the noise problem of the magnetron and facilitating the improvement of the output efficiency of the microwave generating device 100.

[0072] It can be understood that, according to the description of the foregoing embodiments, the microwaves generated by the microwave generating device 100 can be used to heat objects (e.g., food). On this basis, the microwaves can be guided into the cavity 201 of the household appliance 200, so that the food placed in the cavity 201 can be heated, achieving the function of heating food. The microwave generating device 100 can be a magnetron. The household appliance 200 can be a microwave oven.

[0073] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "certain embodiments", "exemplary embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiments or examples are included in at least one embodiment or example of the present application. In the present specification, the exemplary description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0074] Although the embodiments of the present application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made thereto without departing from the principles and spirit of the present application, and the scope of the present application is defined by the claims and their equivalents.​

Claims

1. A microwave generator, characterized in that, The microwave generator includes an anode cylinder and a magnetic pole assembly. The magnetic pole assembly includes an upper magnetic pole and a lower magnetic pole. The upper magnetic pole is disposed at one end of the anode cylinder, and the lower magnetic pole is disposed at the other end of the anode cylinder. The upper magnetic pole includes a first ring portion and a first extension portion extending outward from the inner ring side of the first ring portion at a first angle. The end of the first extension portion away from the first ring portion forms a first through hole with a first diameter. The lower magnetic pole includes a second ring portion and a second extension portion extending outward from the inner ring side of the second ring portion at a second angle. The end of the second extension portion away from the second ring portion forms a second through hole with a second diameter. The first extension portion and the second extension portion are arranged opposite to each other along the axial direction of the anode cylinder. The first angle is greater than the second angle, and the first diameter is greater than the second diameter. The angle ratio of the first angle to the second angle is in the range of [1.08, 1.2], and the diameter ratio of the first diameter to the second diameter is in the range of [1.04, 1.13].

2. The microwave generator according to claim 1, characterized in that, The center of the first through hole and the center of the second through hole are located on the axis of the anode cylinder.

3. The microwave generator according to claim 1, characterized in that, The angle ratio of the first angle to the second angle is 1.08, and the diameter ratio of the first diameter to the second diameter is 1.

04.

4. The microwave generator according to claim 1, characterized in that, The angle ratio of the first angle to the second angle is 1.12, and the diameter ratio of the first diameter to the second diameter is 1.

09.

5. The microwave generator according to claim 1, characterized in that, The angle ratio of the first angle to the second angle is 1.2, and the diameter ratio of the first diameter to the second diameter is 1.

13.

6. The microwave generator according to claim 1, characterized in that, The microwave generator includes a die, which includes an anode component, a cathode component, a magnetic pole assembly, and an output component. The anode component includes multiple blades, an anode cylinder, and an antenna. The multiple blades are connected to the inner wall of the anode cylinder and are spaced apart circumferentially along the anode cylinder. The cathode component is disposed on the inner side of the anode cylinder along its axial direction. The output component is connected to the lower magnetic pole, and the antenna passes through the lower magnetic pole. One end of the antenna is connected to one of the multiple blades, and the other end of the antenna is connected to the output component.

7. The microwave generator according to claim 6, characterized in that, The microwave generator includes a housing and a heat dissipation assembly, the die is housed within the housing, and the heat dissipation assembly is disposed between the housing and the die.

8. The microwave generator according to claim 7, characterized in that, The microwave generator includes an input power supply assembly, which is connected to the housing and positioned close to the upper magnetic pole along the axial direction of the anode cylinder.

9. A household appliance, comprising: cavity; The microwave generating device according to any one of claims 1-8 is disposed in the cavity.

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