Magnetron and cooking utensils

Abstract

This application discloses a magnetron and a cooking appliance, the magnetron comprising a magnetic circuit assembly and a vacuum tube, the magnetic circuit assembly having a closed magnetic circuit and a mounting space, the vacuum tube cooperating with the magnetic circuit assembly, some of the vacuum tubes located in the mounting space and mounted on the closed magnetic circuit, the vacuum tubes containing a cathode assembly, an anode assembly and two magnetic field collectors, the two magnetic field collectors spaced apart on the closed magnetic circuit forming a central region, some structures of the cathode assembly and anode assembly provided within the central region, the sides of the two magnetic field collectors facing the central region are both magnetic field collector end faces, and a notch structure is provided on the magnetic field collector end face of at least one magnetic field collector. According to the magnetron of this application, a central region is formed between the two magnetic field collectors, and some structures of the anode assembly and cathode assembly are provided within the central region. By providing the notch, magnetic field lines propagate through the remaining body portion of the magnetic field collector end face, increasing the magnetic field strength in the central region and improving the output power of the magnetron.

Description

Technical Field

[0002]

[0001] Cross - reference to Related Applications This application claims priority to a Chinese patent application filed on August 29, 2023, with the invention title "Magnetron and Cooking Appliance" and application number 202311103269.8, the entire content of which is incorporated herein by reference.

[0002] This application relates to the technical field of household appliances, particularly to magnetrons and cooking appliances.

Background Art

[0003] This section provides only background information related to this disclosure and is not necessarily prior art.

[0004] Cooking appliances (such as microwave ovens or microwave - steam - oven combination ovens, etc.) usually include a main body and a magnetron. The magnetron is installed inside the main body, generates microwaves, and supplies them to the cooking chamber of the main body, using the microwaves to heat - cook the food ingredients in the cooking chamber.

[0005] The magnetron includes a magnetic - circuit assembly. The magnetic - circuit assembly generates a magnetic circuit, and the magnetic - field strength of the magnetic circuit is proportional to the output of the magnetron. However, as the requirement for the microwave output of the magnetron continuously increases, in the prior art, usually, the magnetic - circuit assembly is enlarged to improve the magnetic - field strength. However, the enlargement of the magnetic - circuit assembly increases the overall volume of the magnetron, requires a larger space when installing the magnetron, and causes inconvenience in the assembly of the magnetron.

Summary of the Invention

Problems to be Solved by the Invention

[0006] The objective of this application is to at least solve the problem of increasing the magnetic - field strength on the premise of satisfying the easy installation of the magnetron. This objective is achieved by the following technical means.

Means for Solving the Problems

[0007] The first aspect of this application is, A magnetic circuit assembly having a closed magnetic circuit and mounting space, A magnetron is provided comprising a vacuum tube that cooperates with the magnetic circuit assembly, wherein a portion of the vacuum tube is located within the mounting space and is provided on the closed magnetic circuit, the vacuum tube contains a cathode assembly, an anode assembly and two magnetic collecting members, the two magnetic collecting members are spaced apart on the closed magnetic circuit to form a central region, a portion of the cathode assembly and a portion of the anode assembly are provided within the central region, the sides of the two magnetic collecting members facing the central region are all magnetic collecting end faces, and a notch structure is provided on the magnetic collecting end face of at least one of the magnetic collecting members.

[0008] According to the magnetron of the present invention, a central region is formed between two magnetic collecting members, and a portion of the anode assembly and cathode assembly are provided within this central region. During operation of the magnetron, the cathode assembly generates electrons in the central region and causes them to move toward the anode assembly, and a closed magnetic circuit disrupts the moving electrons, causing them to oscillate in a predetermined direction and generate microwaves. By providing a notch on the magnetic collecting end face of the magnetic collecting member, magnetic field lines propagate through the position of the remaining body portion of the magnetic collecting end face, and when magnetism is induced from one magnetic collecting member to the other, the magnetic field lines are effectively focused into the central region, thereby increasing the magnetic field strength in the central region and improving the output of the magnetron, assuming that the volume of the magnetron is not changed.

[0009] Furthermore, the magnetron of this application may have the following additional technical features.

[0010] In some embodiments of the present application, the magnetic collecting member is The magnetic collection section on which the magnetic collection end face is provided, The device comprises a flange portion connected to the magnetic collecting portion and provided away from the magnetic collecting end face.

[0011] In some embodiments of the present application, the magnetic collecting portion has a tapered structure along the direction from the flange portion toward the central region.

[0012] In some embodiments of the present application, the number of notches is multiple, and all of the notches are spaced apart along the circumferential direction of the magnetic collecting end face.

[0013] In some embodiments of the present application, the notch structure is connected to the edge of the magnetic collecting end face, dividing the magnetic collecting end face into a plurality of magnetic collecting segments.

[0014] In some embodiments of the present application, the anode assembly has a through passage and a plurality of resonant cavities communicating with the through passage, a portion of the cathode assembly structure penetrates the through passage and is spaced apart from the inner wall of the through passage, all of the resonant cavities are spaced apart along the circumferential direction of the through passage, the number of magnetic collecting segments matches the number of resonant cavities, and the magnetic collecting segments and the resonant cavities are provided in a one-to-one correspondence.

[0015] In some embodiments of the present application, when projected along a plane perpendicular to the axial direction of the through passage, the shape of the magnetic collecting segment coincides with the shape of the resonant cavity.

[0016] In some embodiments of the present application, the shape of the notch structure is triangular, rectangular, U-shaped, or arc-shaped along the direction from the magnetic collecting member toward the central region.

[0017] In some embodiments of the present application, the magnetic circuit assembly is A support having the aforementioned mounting space and being plugged into the vacuum tube, wherein at least a portion of the cathode assembly and at least a portion of the anode assembly are provided correspondingly within the mounting space, A first magnetic member fixed inside the support and provided in correspondence with one of the magnetic collecting members, A second magnetic member fixed inside the support and provided corresponding to the other magnetic member, wherein the magnetic direction of the first magnetic member and the magnetic direction of the second magnetic member are opposite, and the support, the first magnetic member, and the second magnetic member constitute the closed magnetic circuit, and a second magnetic member.

[0018] The second aspect of the present application provides a cooking appliance including the above-described magnetron.

[0019] According to the cooking appliance of the present application, a central region is formed between the two magnetic members inside the magnetron, and a partial structure of the anode assembly and the cathode assembly is provided in the central region. During the operation of the magnetron, the cathode assembly generates electrons in the central region and moves them in the direction of the anode assembly. The closed magnetic circuit disturbs the moving electrons and vibrates the electrons in a predetermined direction to generate microwaves. By providing a notch on the magnetic collecting end surface of the magnetic collecting member, the magnetic lines of force propagate through the position of the remaining main body portion of the magnetic collecting end surface. When inducing magnetism from one magnetic collecting member to the other magnetic collecting member, the magnetic lines of force are effectively focused in the central region, so that the magnetic field strength in the central region is increased, and the output of the magnetron is improved on the premise that the volume of the magnetron is not changed.

[0020] By reading the following detailed description of the preferred embodiments, various other advantages and effects will become apparent to those skilled in the art. The drawings are used only for the purpose of showing the preferred embodiments and are not considered to limit the present application. Also, in the entire drawings, the same parts are denoted by the same reference numerals.

Brief Description of the Drawings

[0021] [Figure 1] The local structure of the cooking appliance according to the embodiment of the present application is schematically shown. [Figure 2] It is a structural cross-sectional view of the magnetron of the cooking appliance shown in FIG. 1. [Figure 3] It is a schematic diagram of the local structure of the magnetron shown in FIG. 2. [Figure 4] It is a schematic diagram of the local structure of the structure shown in FIG. 2. [Figure 5] It is a structural schematic diagram from another perspective of the structure shown in FIG. 3. [Figure 6] It is a partial structural schematic diagram of the structure shown in FIG. 3 (the black arrow lines in the figure indicate the direction of magnetic field lines). [Figure 7] It is a structural schematic diagram when the magnetic field collecting member of the magnetron shown in FIG. 2 is in the first embodiment. [Figure 8] It is a structural schematic diagram when the magnetic field collecting member of the magnetron shown in FIG. 2 is in the second embodiment.

Embodiments for Carrying Out the Invention

[0022] Hereinafter, embodiments of the present disclosure will be described in more detail with reference to the drawings. Although exemplary embodiments of the present disclosure are shown in the drawings, the present disclosure is not limited to the embodiments described herein and can be realized in various forms. Conversely, these embodiments are provided so that those skilled in the art can more fully understand the present disclosure and can fully convey the scope of the present disclosure.

[0023] It should be understood that the terms used in this specification are for the purpose of describing specific exemplary embodiments only and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" used in this specification can also include the plural forms. The terms "comprising", "including", "containing" and "having" are inclusive and thereby expressly state the presence of the described features, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components and / or combinations thereof. The steps, processes and operations of the methods described in this specification should not be construed as necessarily being executed in the specific order described or illustrated, unless the execution order is specifically specified. It should also be understood that other or alternative steps can be used.

[0024] The terms "first," "second," "third," etc., may be used herein to describe multiple elements, parts, regions, layers, and / or parts, but these elements, parts, regions, layers, and / or parts should not be limited by these terms. These terms may be used only to distinguish one element, part, region, layer, or part from another region, layer, or part. Unless the context clearly indicates otherwise, the terms "first," "second," etc., and other numerical terms used herein do not imply order or hierarchy. Accordingly, the first element, part, region, layer, or part discussed below may be referred to as the second element, part, region, layer, or part without departing from the teaching of the exemplary embodiments.

[0025] For the sake of clarity, this specification may use spatially relative terms to describe the relationship between one element or feature shown in the drawings and another element or feature, such as “inside,” “outside,” “inside,” “outside,” “bottom,” “downward,” “top,” and “upward.” Such spatially relative terms are intended to include various orientations of the device in use or operation, in addition to the orientations depicted in the drawings. For example, if the device in the drawing is inverted, an element described as “below the other element or feature” or “below the other element or feature” would then be directed as “above the other element or feature” or “above the other element or feature.” Thus, the exemplary term “...downward” can include both upward and downward orientations. The device may be positioned in other orientations (90-degree rotation or other directions), and the spatially relative descriptions used herein shall be interpreted accordingly.

[0026] As shown in Figures 1 to 8, according to an embodiment of the present invention, a magnetron 21 comprising a magnetic circuit assembly 211 and a vacuum tube is provided.

[0027] Specifically, a mounting space 2112a and a closed magnetic circuit are formed on the magnetic circuit assembly 211, the vacuum tube is mounted on the magnetic circuit assembly 211, some of the vacuum tube's structure is located within the mounting space 2112a of the magnetic circuit assembly 211, and the closed magnetic circuit passes through the vacuum tube. Inside the vacuum tube are an anode assembly 215, a magnetic collector 216, and a cathode assembly 214. There are two magnetic collectors 216, each placed on a closed magnetic circuit and spaced apart from one another. The space between the two magnetic collectors 216 constitutes a central region 2112b (see Figures 4 to 6). Parts of the cathode assembly 214 and anode assembly 215 are located within the central region 2112b. The sides of the magnetic collectors 216 facing the central region 2112b are magnetic collector end faces 2164, and a notch structure 2163 is provided on the magnetic collector end face 2164 of at least one of the two magnetic collectors 216.

[0028] Specifically, a central region 2112b is formed between two magnetic collecting members 216, and parts of the anode assembly 215 and cathode assembly 214 are located within the central region 2112b. During operation of the magnetron, the cathode assembly 214 generates electrons in the central region 2112b, causing them to move toward the anode assembly 215, and the closed magnetic circuit disrupts the moving electrons, causing them to vibrate in a predetermined direction and generate microwaves.

[0029] By providing a notch on the magnetic collecting end face 2164 of the magnetic collecting member 216, the magnetic field lines propagate through the position of the remaining body portion of the magnetic collecting end face 2164, and when magnetism is induced from one magnetic collecting member 216 to the other magnetic collecting member 216, the magnetic field lines are effectively focused into the central region 2112b, thereby increasing the magnetic field strength in the central region 2112b, and improving the output of the magnetron 21, assuming that the volume of the magnetron 21 is not changed.

[0030] As shown in Figure 6, the two magnetic collecting members 216 are spaced apart on a closed magnetic circuit. The magnetic collecting end face 2164 of one of the two magnetic collecting members 216 emits magnetic field lines, and the magnetic collecting end face 2164 of the other magnetic collecting member 216 receives magnetic field lines. A portion of the cathode assembly 214 and anode assembly 215 is provided within the central region 2112b formed between the two magnetic collecting members 216. Electrons generated in the cathode assembly 214 are radiated towards the anode assembly 215 within the central region 2112b. The notched structure 2163 changes the structure of the magnetic collecting end face 2164, reducing the area of ​​the magnetic collecting end face 2164. This reduces the area for radiating or receiving magnetic field lines, thereby increasing the magnetic field line density in the central region 2112b, further increasing the magnetic field strength in the central region 2112b, and effectively strengthening the output of the magnetron 21.

[0031] Furthermore, as shown in Figure 7 or Figure 8, the notch structure 2163 is formed on the magnetic collecting end face 2164, and the main bodies of the magnetic collecting member 216 located on both sides of the notch structure 2163 are separated by the notch structure 2163. In other words, the notch structure 2163 divides the structure of the magnetic collecting member 216, so that magnetic field lines are transmitted through the main bodies on both sides of the notch structure 2163.

[0032] In this embodiment, one of the two magnetic field collecting members 216 emits magnetic field lines, and the other receives magnetic field lines. By providing a notch structure 2163 on both magnetic field collecting members 216, diffusion during the propagation process of magnetic field lines is prevented, and the magnetic field strength in the central region is guaranteed.

[0033] When there are multiple (two or more) notch structures 2163 on each magnetic collecting member 216, the notch structures 2163 on two magnetic collecting members 216 are provided in a one-to-one correspondence along the axial direction of the vacuum tube, thereby further preventing diffusion during the propagation process of magnetic field lines and ensuring the magnetic field strength in the central region.

[0034] As shown in Figures 2 and 3, the vacuum tube includes a housing (the housing is an insulating material such as glass), and the cathode assembly 214, anode assembly 215, and two magnetic collecting members 216 are each provided inside the housing. The housing is provided with a lead-out structure for the cathode assembly 214 and a lead-out structure for the anode assembly 215, the lead-out structure for the cathode assembly 214 is connected to the cathode assembly 214, and the lead-out structure for the anode assembly 215 is connected to the anode assembly 215. By performing a vacuum evacuation process inside the housing, ionization of the air during operation of the vacuum tube is avoided, and the magnetron 21 is guaranteed to perform well.

[0035] Furthermore, as shown in Figure 2, the coupling method between the vacuum tube and the magnetic circuit assembly 211 is a plug-in type (the mounting position of the vacuum tube can be fixed by the corresponding stopper structure; for example, the vacuum tube has a large volume located within the mounting space 2112a, a small volume located outside the mounting space 2112a, and the dimensions of the structure located within the mounting space 2112a are larger than the plug-in hole, so a part of the vacuum tube structure is housed and fixed within the mounting space 2112a). In other words, by plugging the vacuum tube and the magnetic circuit assembly 211 together, a part of the vacuum tube body is located within the mounting space 2112a, and a part of the cathode assembly 214 and a part of the anode assembly 215 are provided correspondingly within the mounting space 2112a.

[0036] Furthermore, as shown in Figures 4 to 8, in the embodiment of the present application, the magnetic collecting member 216 includes a flange portion 2161 and a magnetic collecting portion 2162, and the magnetic collecting portion 2162 is provided with two opposing end faces, one of which constitutes the magnetic collecting end face 2164, and the flange portion 2161 is provided along the circumferential direction of the magnetic collecting portion 2162 and is provided in close proximity to the other end face of the magnetic collecting portion 2162.

[0037] Specifically, the magnetic field collector 2162 is provided close to the central region 2112b, and the flange portion 2161 is provided away from the central region 2112b. The magnetic field lines of the closed magnetic circuit reach the central region 2112b by passing through the flange portion 2161 and the magnetic field collector 2162 in sequence. The flange portion 2161 receives the magnetic field lines and transmits them to the magnetic field collector 2162. Because the flange portion 2161 is convex in the circumferential direction of the magnetic field collector 2162, the magnetic field lines are refracted as they are transmitted from the flange portion 2161 to the magnetic field collector 2162, and the magnetic field lines are focused. As a result, the density of magnetic field lines output from the magnetic field collector end face 2164 increases, and the magnetic field strength in the central region 2112b increases.

[0038] The magnetic collecting section 2162 has a columnar structure, and the two opposing 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 section 2161 is provided along the axial direction of the columnar structure and is on the same plane as the other end face, thereby forming a top hat structure.

[0039] Furthermore, the magnetic collecting member 216 may have an integrated structure or a segmented structure. If the magnetic collecting member 216 has an integrated structure, it can be manufactured by integral processing. If the magnetic collecting member 216 has a segmented structure, the magnetic collecting portion 2162 and the flange portion 2161 are processed separately before assembly.

[0040] In the embodiment of the present invention, as shown in Figure 7 or Figure 8, the magnetic collecting portion 2162 and the flange portion 2161 of the magnetic collecting member 216 are an integrated structure and are manufactured by press working. The integrated structure is easy to process and can effectively reduce manufacturing costs. Furthermore, during press working, the magnetic collecting portion 2162 and the flange portion are formed by pressing a plate-shaped member with a punch. At this time, the magnetic collecting portion 2162 has a hollow structure, which reduces the mass of the magnetic collecting member 216 and consequently reduces the overall mass of the magnetron 21.

[0041] Furthermore, as shown in Figures 2 to 8, the magnetic collecting portion 2162 exhibits a tapered structure along the direction from the flange portion 2161 toward the central region 2112b.

[0042] Specifically, the magnetic field collecting section 2162, which has a tapered structure, is a frustoconical structure, which includes a large end face and a small end face, the flange section 2161 is connected to the outside of the large end face and is provided on the same plane as the large end face, and the small end face is directed toward the central region 2112b to form the magnetic field collecting end face 2164, and by utilizing the frustoconical structure, the magnetic field lines can be further focused toward the central region 2112b, and by increasing the magnetic field strength of the central region 2112b, the output of the magnetron 21 is improved, or the overall volume is reduced, assuming that the output remains unchanged.

[0043] Let a be the taper angle of the frustum of the cone structure, where the numerical range of a is 60° ≤ a ≤ 70°.

[0044] By setting the taper angle of the frustoconical structure, the magnetic field lines passing through the frustoconical structure are densely focused by the central region 2112b, and the magnetic field strength in the central region 2112b is further increased. This satisfies the objective of improving the output while keeping the volume of the magnetron 21 unchanged, or, while guaranteeing the output to remain constant, reducing the overall volume.

[0045] Furthermore, the taper angle of the frustoconical structure may be 60°, 61°, 62°, 63°, 64°...70°.

[0046] Furthermore, as shown in Figure 7 or Figure 8, in the embodiment of the present application, the notch structure 2163 is provided on the magnetic collecting end face 2164 of the magnetic collecting member 216, and there are multiple notch structures 2163, all of which are provided at intervals along the circumferential direction of the magnetic collecting end face 2164.

[0047] By providing multiple notch structures 2163, the area of ​​the magnetic collecting end face 2164 of the magnetic collecting member 216 is further reduced, and the magnetic field lines propagating through the magnetic collecting end face 2164 become more concentrated, thereby further increasing the magnetic field line density in the central region 2112b and further strengthening the magnetic field strength in the central region 2112b.

[0048] In the embodiments of this application, "multiple" refers to two or more, and the number of notched structures 2163 is multiple, that is, there may be two, three, four, five, six, etc. notched structures 2163.

[0049] As shown in Figure 7 or Figure 8, the arrangement in which the multiple notch structures 2163 are provided at intervals along the circumferential direction of the magnetic collecting end face 2164 (in this embodiment, the magnetic collecting end face 2164 is circular, but in other embodiments, the magnetic collecting end face 2164 may be rectangular, equilateral triangle, regular pentagon, regular hexagon, etc.) may be at equal or unequal intervals. In this embodiment, the arrangement in which the multiple notch structures 2163 are provided at intervals along the circumferential direction of the magnetic collecting end face 2164 is an equal-interval arrangement, which ensures uniformity of magnetic field lines, uniformity of magnetic field strength, and further ensures that the magnetron 21 has good performance.

[0050] Furthermore, the shape of the notch structure 2163 in the direction from the magnetic collecting member 216 toward the central region 2112b includes, but is not limited to, a rectangle (as shown in Figure 8), a U-shape, an arc shape, a triangle (as shown in Figure 7), etc. By setting the shape of the notch structure 2163, the usage needs of different magnetrons 21 can be met, and the versatility of the magnetic collecting member 216 is improved.

[0051] Furthermore, as shown in Figures 4 to 8, the magnetic collecting member 216 is composed of a magnetic collecting portion 2162 and a flange portion 2161. The magnetic collecting portion 2162 has two end faces that are opposite each other along its axial direction, one of which forms the magnetic collecting end face 2164 and is directed toward the central region 2112b, and the flange structure is provided along the circumferential direction of the magnetic collecting portion 2162 and is on the same plane as the other end face.

[0052] Specifically, in the embodiment of the present application, the magnetic collecting member 216 is integrally molded by press working, and in the press working process, a die is used to press a plate-shaped member to form a magnetic collecting portion 2162 and a flange portion 2161. The end face of the magnetic collecting portion 2162 that is separated from the flange portion 2161 becomes the magnetic collecting end face 2164, and this magnetic collecting end face 2164 is provided with an edge (the body located between the flange portion 2161 and the magnetic collecting end face 2164 of the magnetic collecting portion 2162 is referred to as the first body, the body having the magnetic collecting end face 2164 of the magnetic collecting portion 2162 is referred to as the second body, and the transition position between the first body and the second body is the edge of the magnetic collecting end face 2164) and a through hole 2166, the through hole 2166 is located at the center of the magnetic collecting end face 2164 and is used to allow the cathode assembly 214 to pass through. The notch structure 2163 is provided from the inner wall of the through hole 2166 to the edge of the magnetic collection end face 2164, thereby dividing the second body having the magnetic collection end face 2164 into a plurality of magnetic collection segments 2165.

[0053] By providing multiple magnetic field collecting segments 2165, the area of ​​the magnetic field collecting end face 2164 is further reduced, and the density of magnetic field lines propagating through the magnetic field collecting end face 2164 is further concentrated. This increases the magnetic field line density in the central region 2112b, and further strengthens the magnetic field strength in the central region 2112b.

[0054] Furthermore, if there are two notches 2163, the second body having the magnetic collecting end face 2164 is divided into two magnetic collecting segments 2165, and if there are three notches 2163, the second body having the magnetic collecting end face 2164 is divided into three magnetic collecting segments 2165. In other words, there is a positive correlation between the number of magnetic collecting segments 2165 and the number of notches 2163.

[0055] Furthermore, as shown in Figure 3, in the embodiment of the present invention, the anode assembly 215 is provided with resonant cavities and through passages 2151, and there are multiple resonant cavities, all of which are provided at equal intervals in the circumferential direction of the through passages 2151, and all of which are provided in communication with the through passages 2151. A part of the structure of the cathode assembly 214 penetrates the through passages 2151, and there is a gap between the inner wall of the through passages 2151 and the cathode assembly 214. The number of magnetic collecting segments 2165 of the magnetic collecting member 216 is the same as the number of resonant cavities, and one magnetic collecting segment 2165 is provided corresponding to each resonant cavity.

[0056] Specifically, during the operation of the magnetron 21, the cathode assembly 214 generates electrons, which move toward the anode assembly 215. These electrons are disturbed by the magnetic field in the central region 2112b, and upon entering the resonant cavity, they oscillate at their natural frequency, generating microwaves. By providing one magnetic collection segment 2165 corresponding to the position of each resonant cavity, the magnetic field strength of each resonant cavity is effectively increased, improving the resonant performance for electrons and effectively enhancing the output of the magnetron 21.

[0057] Furthermore, in the axial direction of the through passage 2151, the shape of the resonant cavity and the shape of the magnetic collecting segment 2165 coincide. By setting the shape of the magnetic collecting segment 2165, the shape of the magnetic collecting segment 2165 is more closely matched to the resonant cavity, and by using the magnetic collecting segment 2165 to more effectively enhance the magnetic field strength, the output of the magnetron 21 is further improved.

[0058] Furthermore, as shown in Figures 2, 4 to 6, the magnetic circuit assembly 211 includes a support 2112, a first magnetic member 2111, and a second magnetic member 2113.

[0059] Specifically, a mounting space 2112a is formed in the support 2112, the support 2112 and the vacuum tube are plug-in coupled, at least a portion of the cathode assembly 214 is provided correspondingly within the mounting space 2112a, at least a portion of the anode assembly 215 is provided correspondingly within the mounting space 2112a, the first magnetic member 2111 and the second magnetic member 2113, which have opposite magnetic properties, are fixed inside the support 2112, and the first magnetic member 2111 and the second magnetic member 2113 are provided facing each other, the first magnetic member 2111 is provided corresponding to one magnetic collecting member 216, and the second magnetic member 2113 is provided corresponding to the other magnetic collecting member 216, and the first magnetic member 2111, the second magnetic member 2113 and the support 2112 constitute a closed magnetic circuit.

[0060] Specifically, the first magnetic member 2111 and the second magnetic member 2113, which have opposite magnetic properties, each propagate magnetic field lines through the support 2112. In the region between the first magnetic member 2111 and the second magnetic member 2113, the magnetic field lines are focused by the two magnetic collecting members 216 (for example, the magnetic field lines of the second magnetic member 2113 propagate to the first magnetic member through the support 2112, the first magnetic member propagates its magnetic field lines to the central region 2112b through one of the magnetic collecting members 216, and the magnetic field lines of the central region 2112b return to the second magnetic member through the other magnetic collecting member), thereby forming a closed magnetic circuit. With the closed magnetic circuit composed of the first magnetic member 2111, the second magnetic member 2113 and the support 2112, magnetic leakage and magnetic loss are reduced, and the magnetic field strength in the central region 2112b is guaranteed.

[0061] Furthermore, transition structures such as rounded chamfers can be provided at the corners of the support 2112, thereby reducing magnetic loss at the corners and further guaranteeing the magnetic field strength in the central region, thus ensuring the performance of the magnetron 21.

[0062] Furthermore, the support 2112 may be an integrated structure or a segmented structure. If the support 2112 is an integrated structure, it can be integrated by methods such as press working or casting, and if the support 2112 is a segmented structure, it can be connected and fixed by methods such as welding, riveting, or screw fastening.

[0063] In the embodiment of the present application, the first magnetic member 2111 includes a first magnetic collecting member 216 connected to each other, and the first magnet is provided inside the support 2112 and is fixedly connected to the support 2112.

[0064] The first magnet is a rare-earth magnetic material component, which includes, but is not limited to, neodymium iron-boron alloy components, samarium-cobalt alloy components, platinum-cobalt alloy components, alnico alloy components, etc. By setting the first magnet to a different material component, the magnetic declination of the first magnet can be adjusted, and the first magnetic component 2111 can meet the usage needs of the magnetron 21.

[0065] In the embodiment of the present application, the second magnetic member 2113 includes a second magnet collecting member 216 connected to each other, and the second magnet is provided inside the support 2112 and is fixedly connected to the support 2112.

[0066] The second magnet is a rare-earth magnetic material component, which includes, but is not limited to, neodymium iron-boron alloy components, samarium-cobalt alloy components, platinum-cobalt alloy components, alnico alloy components, etc. By setting the second magnet to a different material component, the magnetic declination of the second magnet can be adjusted, and the second magnetic component 2113 can meet the usage needs of the magnetron 21.

[0067] Furthermore, the magnetron 21 is further equipped with a heat dissipation assembly 212, which can be a heat dissipation fin. The heat dissipation assembly 212 is fitted to the outer surface of the housing 213 by interference fit to dissipate heat and cool it down, and can also be used in combination with a fan to rapidly cool the microwave generator.

[0068] As shown in Figures 1 to 8, the present invention further provides a cooking appliance 100 comprising a microwave generating assembly 20 having a magnetron 21, a waveguide 22, and a stirring member 23. One end of the waveguide 22 is in communication with the magnetron 21, and the other end of the waveguide 22 is in communication with the cooking chamber 11 of the main body 10 of the cooking appliance 100. The stirring member 23 cooperates with the waveguide 22 to stir the microwaves entering the cooking chamber 11 via the waveguide 22, thereby further improving the uniformity of the microwaves entering the cooking chamber 11.

[0069] Specifically, a central region 2112b is formed between two magnetic collecting members 216 inside the magnetron 21, and parts of the anode assembly 215 and cathode assembly 214 are located within the central region 2112b. During operation of the magnetron, the cathode assembly 214 generates electrons in the central region 2112b, causing them to move toward the anode assembly 215, and a closed magnetic circuit disrupts the moving electrons, causing them to oscillate in a predetermined direction and generate microwaves.

[0070] By providing a notch on the magnetic collecting end face 2164 of the magnetic collecting member 216, the magnetic field lines propagate through the position of the remaining body portion of the magnetic collecting end face 2164, and when magnetism is induced from one magnetic collecting member 216 to the other magnetic collecting member 216, the magnetic field lines are effectively focused into the central region 2112b, thereby increasing the magnetic field strength in the central region 2112b, and improving the output of the magnetron 21, assuming that the volume of the magnetron 21 is not changed.

[0071] In this application, the cooking appliance is a microwave oven (in other embodiments, the cooking appliance may be a microwave, steam, oven combination oven, etc.). The structure of other parts of the cooking appliance may be described by existing technology and will not be described again here.

[0072] As described above, these are merely preferred specific embodiments of the present application, but the scope of protection of the present application is not limited thereto. Any modification or substitution that a person skilled in the art could easily conceive within the technical scope disclosed herein is included in the scope of protection of the present application. Therefore, the scope of protection of the present application shall be the same as the scope of protection of the claims. [Explanation of Symbols]

[0073] 100 Cooking utensil, 10 Main body, 11 Cooking chamber, 20 Microwave generation assembly, 21 Magnetron, 211 Magnetic circuit assembly, 2111 First magnetic member, 2112 Support, 2112a Mounting space, 2112b Central region, 2113 Second magnetic member, 212 Heat dissipation assembly, 213 Housing, 214 Cathode assembly, 215 Anode assembly, 2151 Through passage, 216 Magnetic collecting member, 2161 Flange section, 2162 Magnetic collecting section, 2163 Notch structure, 2164 Magnetic collecting end face, 2165 Magnetic collecting segment, 2166 Through hole, 22 Waveguide, 23 Stirring member

Claims

1. It is a magnetron, A magnetic circuit assembly having a closed magnetic circuit and mounting space, A magnetron comprising a vacuum tube cooperating with the magnetic circuit assembly, wherein a portion of the vacuum tube is located within the mounting space and is provided on the closed magnetic circuit, the vacuum tube contains a cathode assembly, an anode assembly and two magnetic collecting members, the two magnetic collecting members are spaced apart on the closed magnetic circuit to form a central region, a portion of the cathode assembly and a portion of the anode assembly are provided within the central region, the sides of the two magnetic collecting members facing the central region are all magnetic collecting end faces, and a notch structure is provided on the magnetic collecting end face of at least one of the magnetic collecting members.

2. The magnetic collecting member is The magnetic collection section on which the magnetic collection end face is provided, The system comprises a flange portion connected to the magnetic collecting portion and provided away from the magnetic collecting end face, The magnetron according to claim 1.

3. The magnetic collecting portion exhibits a tapered structure along the direction from the flange portion toward the central region. The magnetron according to claim 2.

4. The number of the aforementioned notch structures is multiple, and all of the aforementioned notch structures are provided at intervals along the circumferential direction of the magnetic collecting end face. The magnetron according to claim 1.

5. The notch structure is connected to the edge of the magnetic collection end face, and divides the magnetic collection end face into a plurality of magnetic collection segments. The magnetron according to claim 4.

6. The anode assembly has a through passage and a plurality of resonant cavities communicating with the through passage, a portion of the cathode assembly structure penetrates the through passage and is provided at a distance from the inner wall of the through passage, all of the resonant cavities are provided at intervals along the circumferential direction of the through passage, the number of magnetic collection segments matches the number of resonant cavities, and the magnetic collection segments and resonant cavities are provided in a one-to-one correspondence. The magnetron according to claim 5.

7. When projected along a plane perpendicular to the axial direction of the through passage, the shape of the magnetic collection segment matches the shape of the resonant cavity. The magnetron according to claim 6.

8. Along the direction from the magnetic collecting member toward the central region, the shape of the notch structure is triangular, rectangular, U-shaped, or arc-shaped. The magnetron according to claim 1.

9. The magnetic collecting member is A support having the aforementioned mounting space and being plugged into the vacuum tube, wherein at least a portion of the cathode assembly and at least a portion of the anode assembly are provided correspondingly within the mounting space, A first magnetic member fixed inside the support and provided in correspondence with one of the magnetic collecting members, A second magnetic member is fixed inside the support and provided in correspondence with the other magnetic collecting member, wherein the magnetic direction of the first magnetic member and the magnetic direction of the second magnetic member are opposite, and the support, the first magnetic member and the second magnetic member constitute the closed magnetic circuit. The magnetron according to claim 1.

10. A cooking appliance comprising a magnetron as described in any one of claims 1 to 9.

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