Magnetron and cooking utensil

Abstract

Disclosed in the present application are a magnetron and a cooking utensil. The magnetron comprises a magnetic circuit assembly and a vacuum tube, wherein the magnetic circuit assembly is provided with a closed magnetic circuit and a mounting space; the vacuum tube matches the magnetic circuit assembly; part of the vacuum tube is located in the mounting space and on the closed magnetic circuit; a cathode assembly, an anode assembly and two magnetism-gathering members are provided in the vacuum tube; the two magnetism-gathering members are spaced apart on the closed magnetic circuit and form a middle region; part of the structure of the cathode assembly and part of the structure of the anode assembly are arranged in the middle region; the side surfaces of the two magnetism-gathering members facing the middle region are both magnetism-gathering end surfaces; and a notch structure is provided on the magnetism-gathering end face of at least one magnetism-gathering member. According to the magnetron of the present application, the middle region is formed between the two magnetism-gathering members, and part of the structure of the anode assembly and part of the structure of the cathode assembly are arranged in the middle region. Notches are provided, and magnetic lines of force propagate through the positions of the remaining bodies of the magnetism-gathering end surfaces, thus enhancing the magnetic field intensity of the middle region and improving the output power of the magnetron.

Description

Magnetron and cooking utensils

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to Chinese patent application No. 202311103269.8, filed on August 29, 2023, entitled “Magnetron and Cooking Utensil,” the entire contents of which are incorporated herein by reference. Technical Field

[0003] The present application relates to the technical field of household appliances, and in particular to a magnetron and a cooking utensil. Background Art

[0004] This section merely provides background information related to the present disclosure and is not necessarily prior art.

[0005] A cooking appliance (microwave oven or microwave-steam-oven combination, etc.) usually includes a body and a magnetron. The magnetron is installed in the body. The magnetron generates microwaves and feeds the microwaves into the cooking cavity of the body to use microwaves to heat and cook the ingredients to be cooked in the cooking cavity.

[0006] A magnetron includes a magnetic circuit assembly, which generates a magnetic circuit. The magnetic field strength of the magnetic circuit is proportional to the output power of the magnetron. However, as the microwave output power requirements of the magnetron continue to increase, the magnetic field strength is usually increased in the existing technology by enlarging the magnetic circuit assembly. However, the increase in the magnetic circuit assembly increases the overall volume of the magnetron, resulting in a larger space required for installation, making it inconvenient to assemble the magnetron.

[0007] Summary of the Invention

[0008] The purpose of this application is to at least solve the problem of increasing the magnetic field strength of a magnetron while ensuring convenient installation. This purpose is achieved through the following technical solutions:

[0009] A first aspect of the present application provides a magnetron, comprising:

[0010] A magnetic circuit assembly having a closed magnetic circuit and an installation space;

[0011] A vacuum tube, the vacuum tube cooperates with the magnetic circuit assembly, part of the vacuum tube is located in the installation space and in the closed magnetic circuit, a cathode assembly, an anode assembly and two magnetic concentrators are provided in the vacuum tube, the two magnetic concentrators are arranged at intervals in the closed magnetic circuit and form a middle area, part of the structure of the cathode assembly and part of the structure of the anode assembly are arranged in the middle area, the sides of the two magnetic concentrators facing the middle area are both magnetic concentrator end faces, and at least one of the magnetic concentrators has a notch structure on the magnetic concentrator end face.

[0012] According to the magnetron of the present application, a middle area is formed between the two magnetic concentrators, and part of the structure of the anode assembly and the cathode assembly is arranged in the middle area. When the magnetron is in operation, in the middle area, the cathode assembly generates electrons and moves in the direction of the anode assembly. The closed magnetic circuit disturbs the moving electrons, causing the electrons to oscillate in a set direction to generate microwaves. A notch is provided on the magnetic end face of the magnetic concentrator, and the magnetic lines of force propagate through the position of the remaining body of the magnetic end face. When one magnetic concentrator conducts magnetism to another magnetic concentrator, the magnetic lines of force are effectively gathered in the middle area, so that the magnetic field strength in the middle area is increased, thereby improving the output power of the magnetron without changing the volume of the magnetron.

[0013] In addition, the magnetron according to the present application may also have the following additional technical features:

[0014] In some embodiments of the present application, the magnetic concentrator includes:

[0015] A magnetic concentrating portion, wherein the magnetic concentrating end surface is arranged on the magnetic concentrating portion;

[0016] The flange portion is connected to the magnetic concentrating portion and is arranged away from the magnetic concentrating end surface.

[0017] In some embodiments of the present application, the magnetic concentrating portion has a tapered structure along the direction from the flange portion to the middle region.

[0018] In some embodiments of the present application, there are multiple notch structures, and all of the notch structures are arranged at intervals along the circumference of the magnetic concentrating end surface.

[0019] In some embodiments of the present application, the notch structure is connected to the edge of the magnetic concentrating end surface, and separates the magnetic concentrating end surface into a plurality of magnetic concentrating segments.

[0020] In some embodiments of the present application, the anode assembly has a penetration channel and a plurality of resonant cavities connected to the penetration channel, part of the structure of the cathode assembly is penetrated through the penetration channel and spaced apart from the inner wall of the penetration channel, all of the resonant cavities are spaced apart circumferentially along the penetration channel, the number of the magnetic focusing segments is consistent with the number of the resonant cavities, and the magnetic focusing segments are arranged in a one-to-one correspondence with the resonant cavities.

[0021] In some embodiments of the present application, when projected along a plane perpendicular to the axial direction of the penetrating channel, the shape of the magnetic focusing section is consistent with the shape of the resonant cavity.

[0022] In some embodiments of the present application, along the direction from the magnetic concentrator to the central area, the shape of the notch structure is triangular, rectangular, U-shaped or arc-shaped.

[0023] In some embodiments of the present application, the magnetic circuit assembly includes:

[0024] A bracket, wherein the bracket has the installation space, the vacuum tube is plugged into and matched with the bracket, and at least part of the cathode assembly and at least part of the anode assembly are correspondingly arranged in the installation space;

[0025] a first magnetic member, the first magnetic member being fixed to the inner side of the bracket and being arranged corresponding to one of the magnetic concentrators;

[0026] The second magnetic part is fixed on the inner side of the bracket and is arranged corresponding to the other magnetic concentrator. The magnetic direction of the first magnetic part is opposite to the magnetic direction of the second magnetic part. The bracket, the first magnetic part and the second magnetic part constitute the closed magnetic circuit.

[0027] A second aspect of the present application provides a cooking appliance, comprising the magnetron as described above.

[0028] According to the cooking utensil of the present application, a middle area is formed inside the magnetron between the two magnetic concentrators, and part of the structure of the anode assembly and the cathode assembly is arranged in the middle area. When the magnetron is in operation, in the middle area, the cathode assembly generates electrons and moves in the direction of the anode assembly. The closed magnetic circuit disturbs the moving electrons, causing the electrons to oscillate in a set direction to generate microwaves. A notch is provided on the magnetic end face of the magnetic concentrator, and the magnetic lines of force propagate through the position of the remaining body of the magnetic end face. When one magnetic concentrator conducts magnetism to another magnetic concentrator, the magnetic lines of force are effectively gathered in the middle area, so that the magnetic field strength in the middle area is increased, thereby improving the output power of the magnetron without changing the volume of the magnetron. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiment below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present application. The same reference numerals are used throughout the drawings to denote the same components. In the drawings:

[0030] FIG1 schematically shows a partial structural diagram of a cooking appliance according to an embodiment of the present application;

[0031] FIG2 is a cross-sectional view of the structure of the magnetron of the cooking appliance shown in FIG1 ;

[0032] FIG3 is a schematic diagram of a partial structure of the magnetron shown in FIG2 ;

[0033] FIG4 is a schematic diagram of a partial structure of the structure shown in FIG2 ;

[0034] FIG5 is a schematic structural diagram of the structure shown in FIG3 from another perspective;

[0035] FIG6 is a schematic structural diagram of a portion of the structure shown in FIG3 (the black arrow line in the figure is the direction of the magnetic field line);

[0036] FIG7 is a schematic structural diagram of the magnetron shown in FIG2 when the magnetic concentrator is in the first embodiment;

[0037] FIG8 is a schematic structural diagram of the magnetron shown in FIG2 when the magnetic flux concentrator is in the second embodiment.

[0038] The figures are marked as follows: 100 is a cooking utensil; 10 is a machine body; 11 is a cooking cavity; 20 is a microwave generating assembly; 21 is a magnetron; 211 is a magnetic circuit assembly; 2111 is a first magnetic component, 2112 is a bracket, 2112a is an installation space, 2112b is a middle area, 2113 is a second magnetic component; 212 is a heat dissipation assembly; 213 is a shell; 214 is a cathode assembly; 215 is an anode assembly; 2151 is a through channel; 216 is a magnetic collecting component; 2161 is a flange portion, 2162 is a magnetic collecting portion, 2163 is a notch structure, 2164 is a magnetic collecting end face, 2165 is a magnetic collecting section, 2166 is a through hole; 22 is a waveguide; 23 is a stirring member. DETAILED DESCRIPTION

[0039] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments described herein. Rather, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0040] It should be understood that the terms used herein are for the purpose of describing specific example embodiments only and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "one", "an" and "said" as used herein may also be meant to include plural forms. The terms "comprise", "include", "contain" and "have" are inclusive and therefore specify the presence of stated features, steps, operations, elements and / or parts, but do not exclude the presence or addition of one or more other features, steps, operations, elements, parts, and / or combinations thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring them to be performed in the specific order described or illustrated, unless the order of execution is clearly indicated. It should also be understood that additional or alternative steps may be used.

[0041] Although the terms first, second, third, etc. can be used in the text to describe multiple elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can only be used to distinguish an element, component, region, layer or section from another region, layer or section. Unless the context clearly indicates otherwise, terms such as "first", "second" and other numerical terms do not imply order or sequence when used in the text. Therefore, the first element, component, region, layer or section discussed below can be referred to as the second element, component, region, layer or section without departing from the teaching of the example embodiments.

[0042] For ease of description, spatially relative terms may be used herein to describe the relationship of one element or feature relative to another element or feature as shown in the figures, such as "inside," "outside," "inside," "outside," "below," "beneath," "above," and the like. Such spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is flipped, an element described as "below" or "below" another element or feature would then be oriented as "above" or "above" another element or feature. Thus, the example term "below" can include both above and below orientations. The device may be otherwise oriented (rotated 90 degrees or in other orientations) and the spatially relative descriptors used herein are interpreted accordingly.

[0043] As shown in FIG. 1 to FIG. 8 , according to an embodiment of the present application, a magnetron 21 is proposed. The magnetron 21 includes a magnetic circuit component 211 and a vacuum tube.

[0044] Specifically, a mounting space 2112a and a closed magnetic circuit are formed on the magnetic circuit assembly 211. A vacuum tube is mounted on the magnetic circuit assembly 211, and a portion of the vacuum tube structure is located within the mounting space 2112a of the magnetic circuit assembly 211. The closed magnetic circuit passes through the vacuum tube. An anode assembly 215, a magnetic concentrator 216, and a cathode assembly 214 are disposed within the vacuum tube. Two magnetic concentrators 216 are disposed on the closed magnetic circuit, and the two magnetic concentrators 216 are spaced apart from each other. The region separated by the two magnetic concentrators 216 constitutes a central region 2112b (as shown in Figures 4 to 6). Portions of the cathode assembly 214 and anode assembly 215 are disposed within the central region 2112b. The side of the magnetic concentrator 216 facing the central region 2112b is a magnetic concentrator end surface 2164. A notch structure 2163 is disposed on the magnetic concentrator end surface 2164 of at least one of the two magnetic concentrators 216.

[0045] Specifically, a central region 2112b is formed between the two magnetic concentrators 216. The anode assembly 215 and portions of the cathode assembly 214 are disposed within the central region 2112b. When the magnetron 21 is in operation, the cathode assembly 214 generates electrons in the central region 2112b that move toward the anode assembly 215. The closed magnetic circuit disturbs the moving electrons, causing them to oscillate in a predetermined direction, thereby generating microwaves.

[0046] A notch is provided on the magnetic end face 2164 of the magnetic concentrator 216, and the magnetic lines of force propagate through the remaining position of the magnetic end face 2164. When one magnetic concentrator 216 conducts magnetism to another magnetic concentrator 216, the magnetic lines of force are effectively gathered in the middle area 2112b, so that the magnetic field strength in the middle area 2112b is increased, thereby improving the output power of the magnetron 21 without changing the volume of the magnetron 21.

[0047] It should be understood that, as shown in Figure 6, the two magnetic concentrators 216 are arranged at intervals on the closed magnetic circuit, and the magnetic concentrator end face 2164 of one of the magnetic concentrators 216 is used to emit magnetic lines of force, and the magnetic concentrator end face 2164 of the other magnetic concentrator 216 is used to receive magnetic lines of force. The middle area 2112b formed between the two magnetic concentrators 216 is provided with a cathode assembly 214 and a partial structure of the anode assembly 215, and the cathode assembly 214 generates electrons in the middle area 2112b and emits them to the anode assembly 215. By setting the notch structure 2163, the structure of the magnetic concentrator end face 2164 is changed, the area of ​​the magnetic concentrator end face 2164 is reduced, and the emission or receiving area of ​​the magnetic lines of force is smaller, thereby improving the magnetic line density of the middle area 2112b, and then increasing the magnetic field strength of the middle area 2112b, so that the output power of the magnetron 21 is effectively enhanced.

[0048] In addition, as shown in Figure 7 or Figure 8, a notch structure 2163 is formed on the magnetic concentrating end surface 2164, and the main body of the magnetic concentrating component 216 located on both sides of the notch structure 2163 is separated by the notch structure 2163, that is, the notch structure 2163 separates the structure of the magnetic concentrating component 216, so that the magnetic lines of force are transmitted through the main body on both sides of the notch structure 2163.

[0049] It should be pointed out that in the embodiment of the present application, one of the two magnetic concentrators 216 is used to emit magnetic lines of force, and the other is used to receive magnetic lines of force. A notch structure 2163 is provided on both magnetic concentrators 216 to ensure that the magnetic lines of force do not diverge during the propagation process, thereby ensuring the magnetic field strength in the central area.

[0050] When there are multiple notch structures 2163 on each magnetic concentrator 216 (two or more), the notch structures 2163 on the two magnetic concentrators 216 are arranged one by one along the axial direction of the vacuum tube, thereby further ensuring that the magnetic lines of force do not diverge during the propagation process, thereby ensuring the magnetic field strength in the central area.

[0051] As shown in Figures 2 and 3, the vacuum tube includes an outer shell (the outer shell is an insulating member, such as glass, etc.), a cathode assembly 214, an anode assembly 215 and two magnetic concentrators 216 are respectively arranged in the outer shell, and a lead-out structure of the cathode assembly 214 and a lead-out structure of the anode assembly 215 are provided on the outer shell, wherein the lead-out structure of the cathode assembly 214 is connected to the cathode assembly 214, and the lead-out structure of the anode assembly 215 is connected to the anode assembly 215. The interior of the outer shell is vacuumed to avoid air ionization during the operation of the vacuum tube, thereby ensuring that the magnetron 21 has good performance.

[0052] In addition, as shown in Figure 2, the vacuum tube and the magnetic circuit assembly 211 are matched by plugging (the installation position of the vacuum tube can be fixed by a corresponding limiting structure, for example, the volume of the vacuum tube in the installation space 2112a is large, the volume of the vacuum tube outside the installation space 2112a is small, and the size of the structure of the vacuum tube in the installation space 2112a is larger than the plug-in hole, so that part of the structure of the vacuum tube is accommodated and fixed in the installation space 2112a), that is, the vacuum tube and the magnetic circuit assembly 211 are plugged together, so that part of the body of the vacuum tube is located in the installation space 2112a, wherein part of the structure of the cathode assembly 214 and part of the structure of the anode assembly 215 are correspondingly arranged in the installation space 2112a.

[0053] It is further understood that, as shown in Figures 4 to 8, in the embodiment of the present application, the magnetic focusing member 216 includes a flange portion 2161 and a magnetic focusing portion 2162, wherein the magnetic focusing portion 2162 has two end faces arranged oppositely, one of which constitutes a magnetic focusing end face 2164, and the flange portion 2161 is arranged in a circumferential direction of the magnetic focusing portion 2162 and is arranged close to the other end face of the magnetic focusing portion 2162.

[0054] Specifically, the magnetic concentrating portion 2162 is disposed near the middle region 2112b, and the flange portion 2161 is disposed away from the middle region 2112b. The magnetic lines of force in the closed magnetic circuit sequentially pass through the flange portion 2161 and the magnetic concentrating portion 2162 to reach the middle region 2112b. The flange portion 2161 receives the magnetic lines of force and transmits them to the magnetic concentrating portion 2162. Since the flange portion 2161 is protruding from the circumference of the magnetic concentrating portion 2162, when the magnetic lines of force are transmitted from the flange portion 2161 to the magnetic concentrating portion 2162, the magnetic lines of force are deflected, thereby achieving convergence of the magnetic lines of force. This increases the density of the magnetic lines of force output through the magnetic concentrating end face 2164, thereby increasing the magnetic field strength in the middle region 2112b.

[0055] It should be pointed out that the magnetic collecting portion 2162 is a columnar structure, and the two oppositely arranged end faces are the two axial end faces of the columnar structure, one of which constitutes the magnetic collecting end face 2164, and the flange portion 2161 is arranged in an axial direction of the columnar structure and flush with the other end face, thereby forming a top hat structure.

[0056] In addition, the magnetic concentrator 216 can be an integrated structure or a split structure. When the magnetic concentrator 216 is an integrated structure, it can be manufactured through integrated processing. When the magnetic concentrator 216 is a split structure, the magnetic concentrator part 2162 and the flange part 2161 can be processed separately and then assembled.

[0057] In an embodiment of the present application, as shown in Figure 7 or Figure 8, the magnetic focusing portion 2162 and the flange portion 2161 of the magnetic focusing member 216 are an integrated structure and are processed and manufactured by stamping. The integrated structure is easy to process and can effectively reduce the cost of processing and manufacturing. In addition, during the stamping process, the plate-like member is stamped by a punch to form the magnetic focusing portion 2162 and the flange. At this time, the magnetic focusing portion 2162 is a hollow structure, which can reduce the mass between the magnetic focusing portions, thereby reducing the overall mass of the magnetron 21.

[0058] Furthermore, as shown in FIG. 2 to FIG. 8 , the magnetic concentrating portion 2162 has a tapered structure along the direction from the flange portion 2161 to the middle region 2112 b.

[0059] Specifically, the magnetic collecting portion 2162 with a tapered structure is a frustum structure, wherein the frustum structure includes a large end face and a small end face, the flange portion 2161 is connected to the outside of the large end face and is flush with the large end face, the small end face faces the middle area 2112b and constitutes a magnetic collecting end face 2164. The frustum structure can further make the magnetic lines of force converge to the middle area 2112b, so that the magnetic field strength of the middle area 2112b is enhanced, thereby allowing the magnetron 21 to increase the output power without changing the volume, or reduce the overall volume while ensuring that the output power remains unchanged.

[0060] It should be noted that the taper of the frustum structure is a, where the value range of a is 60°≤b≤70°.

[0061] By setting the taper of the frustum structure, the density of the magnetic lines of force passing through the frustum structure in the central region 2112b can be increased, further improving the magnetic field strength in the central region 2112b, thereby achieving the purpose of increasing the output power of the magnetron 21 without changing the volume, or reducing the overall volume while ensuring that the output power remains unchanged.

[0062] It should be noted that the taper of the frustum structure can be 60°, 61°, 62°, 63°, 64°...70°.

[0063] Furthermore, as shown in FIG7 or FIG8 , in an embodiment of the present application, a notch structure 2163 is provided on the magnetic concentrating end surface 2164 of the magnetic concentrating component 216 , wherein there are multiple notch structures 2163 , and all the notch structures 2163 are spaced apart in the circumferential direction of the magnetic concentrating end surface 2164 .

[0064] By providing a plurality of notch structures 2163, the area of ​​the magnetic end surface 2164 of the magnetic concentrator 216 is further reduced, so that the magnetic lines of force transmitted through the magnetic end surface 2164 are more concentrated, further increasing the magnetic line density of the middle area 2112b, and further enhancing the magnetic field strength of the middle area 2112b.

[0065] It should be understood that, in the embodiments of the present application, a plurality refers to two or more, and the number of the notch structures 2163 is a plurality, that is, the notch structures 2163 can be two, three, four, five, six...

[0066] It should be pointed out that, as shown in FIG7 or FIG8, a plurality of notch structures 2163 are spaced apart along the circumference of the magnetic focusing end surface 2164 (in the embodiment of the present application, the magnetic focusing end surface 2164 is circular; in other embodiments, the magnetic focusing end surface 2164 may be a rectangle, an equilateral triangle, a regular pentagon, a regular hexagon, etc.) in an equal-spaced arrangement. In the embodiment of the present application, a plurality of notch structures 2163 are spaced apart along the circumference of the magnetic focusing end surface 2164 in an equal-spaced arrangement, thereby ensuring the uniformity of the magnetic lines of force, ensuring the uniformity of the magnetic field strength, and further ensuring that the magnetron 21 has good performance.

[0067] Furthermore, the shape of the notch structure 2163 along the direction from the magnetic concentrator 216 to the middle region 2112b includes, but is not limited to, a rectangle (as shown in FIG8 ), a U-shape, an arc, or a triangle (as shown in FIG7 ). By adjusting the shape of the notch structure 2163, the requirements of different magnetrons 21 can be met, thereby improving the versatility of the magnetic concentrator 216.

[0068] Furthermore, as shown in Figures 4 to 8, the magnetic concentrating member 216 is composed of a magnetic concentrating portion 2162 and a flange portion 2161, wherein the magnetic concentrating portion 2162 has two oppositely arranged end faces along its axial direction, one end face constitutes a magnetic concentrating end face 2164 and faces the middle area 2112b, and the flange structure is arranged in a circumferential direction of the magnetic concentrating portion 2162 and is flush with the other end face.

[0069] Specifically, in the embodiment of the present application, the magnetic concentrator 216 is integrally formed by stamping, wherein, during the stamping process, a mold is used to stamp the plate-like member to form a magnetic concentrator portion 2162 and a flange portion 2161. The end surface of the magnetic concentrator portion 2162 away from the flange portion 2161 is a magnetic concentrator end surface 2164, and the magnetic concentrator end surface 2164 has an edge (the body of the magnetic concentrator portion 2162 located between the flange portion 2161 and the magnetic concentrator end surface 2164 is the first body, the body having the magnetic concentrator portion 2162 and the magnetic concentrator end surface 2164 is the second body, and the transition position between the first body and the second body is the edge of the magnetic concentrator end surface 2164) and a through hole 2166, wherein the through hole 2166 is located at the center of the magnetic concentrator end surface 2164, and the through hole 2166 is used for the cathode assembly 214 to pass through. The notch structure 2163 is opened from the inner wall of the through hole 2166 to the edge of the magnetic focusing end surface 2164 , so that the second body with the magnetic focusing end surface 2164 is divided into a plurality of magnetic focusing segments 2165 .

[0070] By setting up multiple magnetic focusing sections 2165, the area of ​​the magnetic focusing end surface 2164 is further reduced, so that the density of the magnetic lines of force propagating through the magnetic focusing end surface 2164 is more concentrated, thereby further enhancing the density of the magnetic lines of force in the middle area 2112b and further enhancing the magnetic field strength in the middle area 2112b.

[0071] It should be pointed out that when the number of notch structures 2163 is two, the second body with the magnetic focusing end face 2164 is divided into two magnetic focusing segments 2165; when the number of notch structures 2163 is three, the second body with the magnetic focusing end face 2164 is divided into three magnetic focusing segments 2165, that is, the number of magnetic focusing segments 2165 is positively correlated with the number of notch structures 2163.

[0072] Furthermore, as shown in FIG3 , in an embodiment of the present application, the anode assembly 215 is provided with a resonant cavity and a penetration channel 2151. There are multiple resonant cavities, all of which are evenly spaced along the circumference of the penetration channel 2151, and all of the resonant cavities are connected to the penetration channel 2151. Part of the structure of the cathode assembly 214 is penetrated within the penetration channel 2151, and the inner wall of the penetration channel 2151 is spaced apart from the cathode assembly 214. The number of magnetic focusing segments 2165 on the magnetic focusing member 216 is the same as the number of resonant cavities, and each resonant cavity is provided with a corresponding magnetic focusing segment 2165.

[0073] Specifically, when the magnetron 21 is operating, the cathode assembly 214 generates electrons, which move toward the anode assembly 215. Under the disturbance of the magnetic field in the central region 2112b, the electrons entering the resonant cavity oscillate at their natural frequency, thereby generating microwaves. By providing a magnetic focusing section 2165 at a corresponding position in each resonant cavity, the magnetic field strength of each resonant cavity is effectively enhanced, thereby improving the resonance performance for electrons and effectively increasing the output power of the magnetron 21.

[0074] Furthermore, in the axial direction of the passage 2151, the resonant cavity and the magnetic field focusing section 2165 have the same shape. By adjusting the shape of the magnetic field focusing section 2165, the shape of the magnetic field focusing section 2165 is more compatible with the resonant cavity, thereby utilizing the magnetic field focusing section 2165 to better enhance the magnetic field strength, thereby further improving the output power of the magnetron 21.

[0075] Furthermore, as shown in FIG. 2 and FIG. 4 to FIG. 6 , the magnetic circuit assembly 211 includes a bracket 2112 , a first magnetic member 2111 and a second magnetic member 2113 .

[0076] Specifically, the bracket 2112 forms an installation space 2112a, the bracket 2112 is plugged into the vacuum tube, at least part of the structure of the cathode assembly 214 is correspondingly arranged in the installation space 2112a, and at least part of the structure of the anode assembly 215 is correspondingly arranged in the installation space 2112a. The first magnetic part 2111 and the second magnetic part 2113 with opposite magnetic properties are respectively fixed on the inner side of the bracket 2112, and the first magnetic part 2111 and the second magnetic part 2113 are arranged opposite to each other. The first magnetic part 2111 is arranged corresponding to a magnetic collecting part 216, and the second magnetic part 2113 is arranged corresponding to another magnetic collecting part 216. The first magnetic part 2111, the second magnetic part 2113 and the bracket 2112 constitute a closed magnetic circuit.

[0077] Specifically, the first magnetic member 2111 and the second magnetic member 2113, which have opposite magnetic properties, respectively propagate magnetic lines of force through the bracket 2112. The magnetic lines of force are converged in the area between the first magnetic member 2111 and the second magnetic member 2113 through two magnetic concentrators 216 (for example, the magnetic lines of force of the second magnetic member 2113 are propagated to the first magnetic member through the bracket 2112, and the first magnetic member propagates the magnetic lines of force to the middle region 2112b through one magnetic concentrator 216. The magnetic lines of force in the middle region 2112b are returned to the second magnetic member via another magnetic member), thereby forming a closed magnetic circuit. The closed magnetic circuit formed by the first magnetic member 2111, the second magnetic member 2113, and the bracket 2112 reduces magnetic leakage and magnetic loss, thereby ensuring the magnetic field strength in the middle region 2112b.

[0078] In addition, transition structures such as rounded chamfers can be provided at the corners of the bracket 2112 to reduce magnetic loss at the corners, further ensuring the strength of the central magnetic field, thereby ensuring the performance of the magnetron 21.

[0079] Furthermore, the bracket 2112 can be an integral structure or a split structure. When the bracket 2112 is an integral structure, it can be integrated by stamping or casting. When the bracket 2112 is a split structure, it can be connected and fixed by welding, riveting, screw connection, etc.

[0080] In an embodiment of the present application, the first magnetic member 2111 includes a connected first magnetic concentrator 216 , wherein the first magnet is disposed on the inner side of the bracket 2112 and is connected and fixed to the bracket 2112 .

[0081] The first magnet is made of a rare earth magnetic material, including but not limited to neodymium iron boron alloy, samarium cobalt alloy, platinum cobalt alloy, and alnico alloy. By making the first magnet of different materials, the magnetic declination of the first magnet can be adjusted, thereby ensuring that the first magnetic member 2111 meets the requirements of the magnetron 21.

[0082] In an embodiment of the present application, the second magnetic member 2113 includes a connected second magnetic concentrator 216 , wherein the second magnet is disposed on the inner side of the bracket 2112 and is fixedly connected to the bracket 2112 .

[0083] The second magnet is made of a rare earth magnetic material, including but not limited to neodymium iron boron alloy, samarium cobalt alloy, platinum cobalt alloy, and alnico alloy. By making the second magnet of different materials, the magnetic declination of the first magnet can be adjusted, thereby ensuring that the second magnetic member 2113 meets the requirements of the magnetron 21.

[0084] Furthermore, the magnetron 21 also includes a heat dissipation component 212, which can be a heat dissipation fin. The heat dissipation component 212 is sleeved on the outer surface of the shell 213 by interference fit to dissipate heat and cool it. At the same time, it can cooperate with a fan to quickly cool the microwave generating device.

[0085] As shown in Figures 1 to 8, the present application also provides a cooking appliance 100, which includes a microwave generating assembly 20, which includes a magnetron 21, a waveguide 22, and a stirring member 23. One end of the waveguide 22 is connected to the magnetron 21, and the other end of the waveguide 22 is connected to the cooking cavity 11 of the body 10 of the cooking appliance 100. The stirring member 23 cooperates with the waveguide 22 and stirs the microwaves entering the cooking cavity 11 through the waveguide 22, thereby improving the uniformity of the microwaves entering the cooking cavity 11.

[0086] Specifically, a central region 2112b is formed within the magnetron 21 between the two magnetic concentrators 216. The anode assembly 215 and portions of the cathode assembly 214 are located within this central region 2112b. When the magnetron 21 is in operation, electrons are generated by the cathode assembly 214 in this central region 2112b and move toward the anode assembly 215. The closed magnetic circuit disturbs the moving electrons, causing them to oscillate in a predetermined direction, generating microwaves.

[0087] A notch is provided on the magnetic end face 2164 of the magnetic concentrator 216, and the magnetic lines of force propagate through the remaining position of the magnetic end face 2164. When one magnetic concentrator 216 conducts magnetism to another magnetic concentrator 216, the magnetic lines of force are effectively gathered in the middle area 2112b, so that the magnetic field strength in the middle area 2112b is increased, thereby improving the output power of the magnetron 21 without changing the volume of the magnetron 21.

[0088] In the present application, the above-mentioned cooking utensil is a microwave oven (in other embodiments, the cooking utensil is a microwave oven-steamer-bake combination, etc.). For the structure of other parts of the cooking utensil, please refer to the prior art and will not be described in detail in this application.

[0089] The above description is merely a preferred embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A magnetron, wherein: The magnetron comprises: A magnetic circuit assembly, wherein the magnetic circuit assembly has a closed magnetic circuit and an installation space; A vacuum tube, wherein the vacuum tube cooperates with the magnetic circuit assembly, wherein part of the vacuum tube is located in the installation space and in the closed magnetic circuit, wherein a cathode assembly, an anode assembly and two magnetic concentrators are arranged in the vacuum tube, wherein the two magnetic concentrators are arranged at intervals in the closed magnetic circuit and form a middle area, wherein part of the structure of the cathode assembly and part of the structure of the anode assembly are arranged in the middle area, and the sides of the two magnetic concentrators facing the middle area are both magnetic concentrator end faces, and a notch structure is provided on the magnetic concentrator end face of at least one of the magnetic concentrators.

2. The magnetron according to claim 1, wherein: The magnetic concentrator comprises: A magnetic field concentrating portion, wherein the magnetic field concentrating end surface is arranged on the magnetic field concentrating portion; A flange portion is connected to the magnetic field collecting portion and is arranged away from the magnetic field collecting end surface.

3. The magnetron according to claim 2, wherein: Along the direction from the flange portion to the middle area, the magnetic field focusing portion has a tapered structure.

4. The magnetron according to claim 1, wherein: There are multiple notch structures, and all of the notch structures are arranged at intervals along the circumferential direction of the magnetic field focusing end surface.

5. The magnetron according to claim 4, wherein: The notch structure is connected to the edge of the magnetic field collecting end surface and divides the magnetic field collecting end surface into a plurality of magnetic field collecting segments.

6. The magnetron according to claim 5, wherein: The anode component has a penetration channel and a plurality of resonant cavities connected to the penetration channel, a partial structure of the cathode component is penetrated through the penetration channel and spaced apart from the inner wall of the penetration channel, all the resonant cavities are spaced apart along the circumference of the penetration channel, the number of the magnetic focusing segments is consistent with the number of the resonant cavities, and the magnetic focusing segments and the resonant cavities are arranged in a one-to-one correspondence.

7. The magnetron according to claim 6, wherein: Projected along a plane perpendicular to the axial direction of the penetration channel, the shape of the magnetic focusing section is consistent with the shape of the resonance cavity.

8. The magnetron according to claim 1, wherein: Along the direction from the magnetic concentrator to the middle area, the shape of the notch structure is triangular, rectangular, U-shaped or arc-shaped.

9. The magnetron according to any one of claims 1 to 8, wherein: The magnetic circuit assembly comprises: A bracket, wherein the bracket has the installation space, the vacuum tube is plugged and matched with the bracket, and at least part of the cathode assembly and at least part of the anode assembly are correspondingly arranged in the installation space; A first magnetic member, the first magnetic member is fixed to the inner side of the bracket and is arranged corresponding to one of the magnetic concentrators; The second magnetic component is fixed on the inner side of the bracket and is arranged corresponding to another magnetic focusing component. The magnetic direction of the first magnetic component is opposite to the magnetic direction of the second magnetic component. The bracket, the first magnetic component and the second magnetic component constitute the closed magnetic circuit.

10. A cooking appliance, wherein: The cooking appliance comprises the magnetron according to any one of claims 1 to 9.

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