Magnetron and cooking utensil

Abstract

The magnetron comprises a magnetic circuit assembly and a vacuum tube, the magnetic circuit assembly is provided with a closed magnetic circuit and an installation space, the vacuum tube is matched with the magnetic circuit assembly, part of the vacuum tube is located in the installation space and located on the closed magnetic circuit, and a cathode assembly, an anode assembly and two magnetism gathering pieces are arranged in the vacuum tube. The two magnetism gathering pieces are arranged on the closed magnetic circuit in a spaced mode and form a middle area, a part of structure of the cathode assembly and a part of structure of the anode assembly are arranged in the middle area, the side faces, facing the middle area, of the two magnetism gathering pieces are magnetism gathering end faces, and the magnetism gathering end face of at least one magnetism gathering piece is provided with a notch structure. According to the magnetron provided by the invention, the middle area is formed between the two magnetic gathering pieces, and partial structures of the anode assembly and the cathode assembly are arranged in the middle area. The gap is arranged, and magnetic lines are spread through the position of the residual body on the magnetism gathering end face, so that the magnetic field intensity of the middle area is increased, and the output power of the magnetron is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of household appliances, and in particular to a magnetron and a cooking utensil. Background Art

[0002] This section merely provides background information related to the present disclosure and is not necessarily prior art.

[0003] A cooking appliance (a microwave oven or a microwave oven-steamer / oven, etc.) usually includes a body and a magnetron. The magnetron is installed in the body. The magnetron generates microwaves and feeds the microwaves into a cooking cavity of the body to heat and cook the food to be cooked in the cooking cavity using the microwaves.

[0004] The 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, in the prior art, the magnetic field strength is usually increased by increasing the size of the magnetic circuit assembly. However, the increase in the size of the magnetic circuit assembly increases the overall volume of the magnetron, which results in the magnetron requiring a larger space during installation, making it inconvenient to assemble the magnetron. Summary of the invention

[0005] The purpose of the present invention 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:

[0006] A first aspect of the present invention provides a magnetron, comprising:

[0007] A magnetic circuit assembly, wherein the magnetic circuit assembly has a closed magnetic circuit and an installation space;

[0008] 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.

[0009] According to the magnetron of the present invention, a middle area is formed between 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, and the closed magnetic circuit disturbs the moving electrons, so that the electrons oscillate in a set direction to generate microwaves. A notch is provided on the magnetic concentrator end face of the magnetic concentrator, and the magnetic lines of force propagate through the position of the remaining body of the magnetic concentrator 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.

[0010] In addition, the magnetron according to the present invention may also have the following additional technical features:

[0011] In some embodiments of the present invention, the magnetic concentrator comprises:

[0012] A magnetic field concentrating portion, wherein the magnetic field concentrating end surface is arranged on the magnetic field concentrating portion;

[0013] A flange portion is connected to the magnetic field collecting portion and is arranged away from the magnetic field collecting end surface.

[0014] In some embodiments of the present invention, the magnetic field focusing portion has a tapered structure along the direction from the flange portion to the middle region.

[0015] In some embodiments of the present invention, there are multiple notch structures, and all of the notch structures are arranged at intervals along the circumferential direction of the magnetic concentrating end surface.

[0016] In some embodiments of the present invention, the notch structure is connected to the edge of the magnetic field concentrating end surface, and divides the magnetic field concentrating end surface into a plurality of magnetic field concentrating segments.

[0017] In some embodiments of the present invention, 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 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 and the resonant cavities are arranged in a one-to-one correspondence.

[0018] In some embodiments of the present invention, when 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.

[0019] In some embodiments of the present invention, along the direction from the magnetic focusing member to the middle region, the shape of the notch structure is triangular, rectangular, U-shaped or arc-shaped.

[0020] In some embodiments of the present invention, the magnetic circuit assembly comprises:

[0021] 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;

[0022] 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;

[0023] 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.

[0024] A second aspect of the present invention provides a cooking appliance, comprising the magnetron as described above.

[0025] According to the cooking utensil of the present invention, a middle area is formed inside the magnetron between two magnetic concentrators, and partial structures of the anode assembly and the cathode assembly are 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, and the closed magnetic circuit disturbs the moving electrons, so that the electrons oscillate in a set direction to generate microwaves. A notch is provided on the magnetic concentrator end face of the magnetic concentrator, and the magnetic lines of force propagate through the position of the remaining body of the magnetic concentrator 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

[0026] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present invention. Moreover, the same reference numerals are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0027] Figure 1 Schematically shows a partial structural diagram of a cooking appliance according to an embodiment of the present invention;

[0028] Figure 2 for Figure 1 A structural cross-sectional view of a magnetron of a cooking appliance shown in ;

[0029] Figure 3 for Figure 2 A schematic diagram of a partial structure of a magnetron shown;

[0030] Figure 4 for Figure 2 A schematic diagram of a partial structure of the structure shown in ;

[0031] Figure 5 for Figure 3 A schematic structural diagram of another perspective of the structure shown in FIG.

[0032] Figure 6 for Figure 3 Schematic diagram of the structure of the part shown in (the black arrow line in the figure is the direction of the magnetic field line);

[0033] Figure 7 for Figure 2 The structure diagram of the magnetron magnetic concentrator shown is a first embodiment;

[0034] Figure 8 for Figure 2 The magnetic flux concentrator of the magnetron shown is a schematic structural diagram of the second embodiment.

[0035] The reference numerals are as follows:

[0036] 100 for cooking utensils;

[0037] 10 is the body;

[0038] 11 is a cooking cavity;

[0039] 20 is a microwave generating component;

[0040] 21 is a magnetron;

[0041] 211 is a magnetic circuit component;

[0042] 2111 is a first magnetic member, 2112 is a bracket, 2112a is an installation space, 2112b is a middle area, and 2113 is a second magnetic member;

[0043] 212 is a heat dissipation component;

[0044] 213 is a housing;

[0045] 214 is a cathode assembly;

[0046] 215 is an anode assembly;

[0047] 2151 is a through passage;

[0048] 216 is a magnetic concentrator;

[0049] 2161 is a flange portion, 2162 is a magnetic focusing portion, 2163 is a notch structure, 2164 is a magnetic focusing end surface, 2165 is a magnetic focusing section, and 2166 is a through hole;

[0050] 22 is a waveguide;

[0051] 23 is a stirring member. DETAILED DESCRIPTION

[0052] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the 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. On the contrary, these embodiments are provided in order 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.

[0053] It should be understood that the terms used herein are only for the purpose of describing specific example embodiments 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 "include", "comprise", "contain", and "have" are inclusive, and therefore specify the existence of stated features, steps, operations, elements and / or parts, but do not exclude the existence 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 interpreted as necessarily requiring them to be performed in the specific order described or illustrated, unless the execution order is clearly indicated. It should also be understood that additional or alternative steps may be used.

[0054] 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, 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.

[0055] For ease of description, spatial 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 figure, such as "inside", "outside", "inner side", "outer side", "below", "below", "above", "above", etc. Such spatial relative terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the figure. For example, if the device in the figure is turned over, then the elements described as "below other elements or features" or "below other elements or features" will subsequently be oriented as "above other elements or features" or "above other elements or features". Therefore, the example term "below..." can include both upper and lower orientations. The device can be oriented otherwise (rotated 90 degrees or in other directions) and the spatial relative descriptors used in the text are interpreted accordingly.

[0056] like Figures 1 to 8 As shown, according to an embodiment of the present invention, a magnetron 21 is provided. The magnetron 21 includes a magnetic circuit component 211 and a vacuum tube.

[0057] Specifically, an installation space 2112a and a closed magnetic circuit are formed on the magnetic circuit assembly 211, and a vacuum tube is installed on the magnetic circuit assembly 211, and a part of the structure of the vacuum tube is located in the installation space 2112a of the magnetic circuit assembly 211, and the closed magnetic circuit passes through the vacuum tube. An anode assembly 215, a magnetic concentrator 216, and a cathode assembly 214 are arranged inside the vacuum tube, wherein the number of magnetic concentrators 216 is two, and the two magnetic concentrators 216 are respectively arranged on the closed magnetic circuit, and the two magnetic concentrators 216 are arranged at intervals from each other, and the area between the two magnetic concentrators 216 constitutes a middle area 2112b (such as Figures 4 to 6 As shown in the figure, part of the structure of the cathode assembly 214 and part of the structure of the anode assembly 215 are respectively arranged in the middle area 2112b, and the side of the magnetic concentrator 216 facing the middle area 2112b is a magnetic concentrator end surface 2164, and a notch structure 2163 is arranged on the magnetic concentrator end surface 2164 of at least one of the two magnetic concentrators 216.

[0058] Specifically, a middle region 2112b is formed between the two magnetic concentrators 216, and the anode assembly 215 and a partial structure of the cathode assembly 214 are arranged in the middle region 2112b. When the magnetron 21 is in operation, in the middle region 2112b, the cathode assembly 214 generates electrons and moves in the direction of the anode assembly 215, and the closed magnetic circuit disturbs the moving electrons, so that the electrons oscillate in a set direction to generate microwaves.

[0059] 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.

[0060] It is important to understand that Figure 6 As shown, 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 an 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, and the area of ​​the magnetic concentrator end face 2164 is reduced, so that 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.

[0061] In addition, if Figure 7 or Figure 8 As shown, the 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 .

[0062] It should be pointed out that in an embodiment of the present invention, 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 propagation, thereby ensuring the magnetic field strength in the central area.

[0063] 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.

[0064] like Figure 2 and Figure 3As shown, 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, and the interior of the outer shell is evacuated to avoid air ionization during the operation of the vacuum tube, thereby ensuring that the magnetron 21 has good performance.

[0065] In addition, if Figure 2 As shown, 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, and 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 and matched, 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.

[0066] It is further understood that if Figures 4 to 8 As shown, in an embodiment of the present invention, 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.

[0067] Specifically, the magnetic concentrator 2162 is arranged close to the middle region 2112b, and the flange 2161 is arranged far away from the middle region 2112b. The magnetic lines of force in the closed magnetic circuit sequentially pass through the flange 2161 and the magnetic concentrator 2162 to reach the middle region 2112b. The flange 2161 receives the magnetic lines of force and transmits them to the magnetic concentrator 2162. Since the flange 2161 is convexly arranged on the circumference of the magnetic concentrator 2162, when the magnetic lines of force are transmitted from the flange 2161 to the magnetic concentrator 2162, the magnetic lines of force are deflected to achieve the convergence of the magnetic lines of force, so that the density of the magnetic lines of force output through the magnetic concentrator end face 2164 is increased, thereby increasing the magnetic field strength of the middle region 2112b.

[0068] 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 the axial direction of the columnar structure and flush with the other end face, thereby forming a top hat structure.

[0069] 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.

[0070] In an embodiment of the present invention, Figure 7 or Figure 8 As shown, the magnetic focusing portion 2162 and the flange portion 2161 of the magnetic focusing member 216 are an integrated structure and are 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.

[0071] Furthermore, if Figures 2 to 8 As shown, the magnetic focusing portion 2162 is a tapered structure along the direction from the flange portion 2161 to the middle region 2112b.

[0072] 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 outer side 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, and the frustum structure can further make the magnetic lines of force converge to the middle area 2112b, so that the magnetic field strength in the middle area 2112b is enhanced, thereby 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.

[0073] It should be pointed out that the taper of the frustum structure is a, where the value range of a is 60°≤b≤70°.

[0074] By setting the taper of the frustum structure, the density of the magnetic lines of force passing through the frustum structure in the middle area 2112b can be made higher, and the magnetic field strength in the middle area 2112b is further improved, so that the output power of the magnetron 21 is increased without changing the volume, or the purpose of reducing the overall volume while ensuring that the output power remains unchanged is achieved.

[0075] It should be pointed out that the taper of the frustum structure can be 60°, 61°, 62°, 63°, 64°...70°.

[0076] Furthermore, if Figure 7 or Figure 8 As shown, in an embodiment of the present invention, a notch structure 2163 is provided on the magnetic concentrating end surface 2164 of the magnetic concentrating member 216 , wherein there are multiple notch structures 2163 , and all the notch structures 2163 are arranged at intervals in the circumferential direction of the magnetic concentrating end surface 2164 .

[0077] By providing a plurality of notch structures 2163, the area of ​​the magnetic concentrating end surface 2164 of the magnetic concentrating component 216 is further reduced, so that the magnetic lines of force transmitted through the magnetic concentrating end surface 2164 are more concentrated, thereby further increasing the magnetic line density of the middle area 2112b, and further enhancing the magnetic field strength of the middle area 2112b.

[0078] It should be understood that, in the embodiments of the present invention, 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, ... . . . .

[0079] It should be pointed out that if Figure 7 or Figure 8 As shown, a plurality of notch structures 2163 may be arranged at equal intervals or at unequal intervals along the circumference of the magnetic focusing end face 2164 (in an embodiment of the present invention, the magnetic focusing end face 2164 is circular, and in other embodiments, the magnetic focusing end face 2164 may be rectangular, equilateral triangle, regular pentagon, regular hexagon, etc.). In an embodiment of the present invention, a plurality of notch structures 2163 may be arranged at equal intervals along the circumference of the magnetic focusing end face 2164, 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.

[0080] Furthermore, the shape of the notch structure 2163 along the direction from the magnetic focusing member 216 to the middle region 2112b includes but is not limited to a rectangle (such as Figure 8 As shown), U-shaped, arc or triangle (as shown Figure 7 By setting the shape of the notch structure 2163, the use requirements of different magnetrons 21 can be met, thereby improving the versatility of the magnetic concentrator 216.

[0081] Furthermore, if Figures 4 to 8As shown, the magnetic concentrator 216 is composed of a magnetic concentrator portion 2162 and a flange portion 2161, wherein the magnetic concentrator portion 2162 has two oppositely arranged end faces along its axial direction, one end face constitutes a magnetic concentrator end face 2164 and faces the middle area 2112b, and the flange structure is arranged in a circumferential direction of the magnetic concentrator portion 2162 and is flush with the other end face.

[0082] Specifically, in the embodiment of the present invention, 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 face of the magnetic concentrator portion 2162 away from the flange portion 2161 is a magnetic concentrator end face 2164, and the magnetic concentrator end face 2164 has an edge (the body of the magnetic concentrator portion 2162 located between the flange portion 2161 and the magnetic concentrator end face 2164 is the first body, the body having the magnetic concentrator portion 2162 and the magnetic concentrator end face 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 face 2164) and a through hole 2166, wherein the through hole 2166 is located at the center of the magnetic concentrator end face 2164, and the through hole 2166 is used for the cathode assembly 214 to be penetrated. 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 .

[0083] By setting up multiple magnetic focusing segments 2165, the area of ​​the magnetic focusing end face 2164 is further reduced, so that the density of the magnetic lines of force propagating through the magnetic focusing end face 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.

[0084] 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.

[0085] Furthermore, if Figure 3 As shown, in the embodiment of the present invention, the anode assembly 215 is provided with a resonant cavity and a penetration channel 2151, the number of the resonant cavities is multiple, all the resonant cavities are arranged at equal intervals along the circumference of the penetration channel 2151, and all the resonant cavities are connected to the penetration channel 2151. Part of the structure of the cathode assembly 214 is penetrated in the penetration channel 2151, and the inner wall of the penetration channel 2151 is spaced 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 correspondingly provided with a magnetic focusing segment 2165.

[0086] Specifically, when the magnetron 21 is working, the cathode assembly 214 generates electrons, and the electrons move toward the anode assembly 215. Under the disturbance of the magnetic field in the middle region 2112b, the electrons entering the resonant cavity oscillate according to the natural frequency, thereby generating microwaves. By providing a magnetic focusing section 2165 at a corresponding position of each resonant cavity, the magnetic field strength of each resonant cavity is effectively enhanced, thereby improving the resonance performance of the electrons, and effectively enhancing the output power of the magnetron 21.

[0087] Furthermore, in the axial direction of the penetrating channel 2151, the resonant cavity is consistent with the shape of the magnetic field section 2165. By setting the shape of the magnetic field section 2165, the shape of the magnetic field section 2165 is more suitable for the resonant cavity, so that the magnetic field strength can be better enhanced by using the magnetic field section 2165, thereby further improving the output power of the magnetron 21.

[0088] Furthermore, if Figure 2 , and 4 to Figure 6 As shown, the magnetic circuit assembly 211 includes a bracket 2112 , a first magnetic component 2111 and a second magnetic component 2113 .

[0089] 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, at least part of the structure of the anode assembly 215 is correspondingly arranged in the installation space 2112a, the first magnetic member 2111 and the second magnetic member 2113 with opposite magnetic properties are respectively fixed on the inner side of the bracket 2112, and the first magnetic member 2111 and the second magnetic member 2113 are arranged opposite to each other, the first magnetic member 2111 is corresponding to a magnetic focusing member 216, the second magnetic member 2113 is corresponding to another magnetic focusing member 216, and the first magnetic member 2111, the second magnetic member 2113 and the bracket 2112 constitute a closed magnetic circuit.

[0090] Specifically, the first magnetic member 2111 and the second magnetic member 2113 with opposite magnetic properties propagate magnetic lines of force through the bracket 2112 respectively, and the magnetic lines of force are converged through two magnetic concentrators 216 in the area between the first magnetic member 2111 and the second magnetic member 2113 (for example, the magnetic lines of force of the second magnetic member 2113 propagate to the first magnetic member through the bracket 2112, and the first magnetic member propagates the magnetic lines of force to the middle area 2112b through a magnetic concentrator 216, and the magnetic lines of force of the middle area 2112b return to the second magnetic member through 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, so that the magnetic field strength of the middle area 2112b can be guaranteed.

[0091] 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.

[0092] Furthermore, the bracket 2112 can be an integrated structure or a split structure. When the bracket 2112 is an integrated structure, it can be integrated by stamping or casting, and when the bracket 2112 is a split structure, it can be connected and fixed by welding, riveting, screw connection, etc.

[0093] In an embodiment of the present invention, the first magnetic member 2111 includes a first magnetic focusing member 216 connected thereto, wherein the first magnet is disposed on the inner side of the bracket 2112 and is connected and fixed to the bracket 2112 .

[0094] The first magnet is a rare earth magnetic material, which includes but is not limited to a neodymium iron boron alloy, a samarium cobalt alloy, a platinum cobalt alloy, and an aluminum nickel cobalt alloy. By setting the first magnet to be made of different materials, the magnetic declination of the first magnet can be adjusted, so that the first magnetic part 2111 can meet the use requirements of the magnetron 21.

[0095] In an embodiment of the present invention, the second magnetic member 2113 includes a second magnetic focusing member 216 connected thereto, wherein the second magnet is disposed on the inner side of the bracket 2112 and is connected and fixed to the bracket 2112 .

[0096] The second magnet is a rare earth magnetic material, which includes but is not limited to a neodymium iron boron alloy, a samarium cobalt alloy, a platinum cobalt alloy, and an aluminum nickel cobalt alloy, etc. By setting the second magnet to be a different material, the magnetic declination of the first magnet can be adjusted, so that the second magnetic part 2113 can meet the use requirements of the magnetron 21.

[0097] 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, and can cooperate with a fan to quickly cool the microwave generating device.

[0098] like Figures 1 to 8 As shown, the present invention also proposes a cooking device 100, which includes a microwave generating assembly 20, and the microwave generating assembly 20 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 device 100. The stirring member 23 cooperates with the waveguide 22, and the stirring member 23 stirs the microwaves entering the cooking cavity 11 through the waveguide 22, so as to make the microwaves entering the cooking cavity 11 more uniform.

[0099] Specifically, inside the magnetron 21, a middle region 2112b is formed between the two magnetic concentrators 216, and the anode assembly 215 and a partial structure of the cathode assembly 214 are arranged in the middle region 2112b. When the magnetron 21 is in operation, in the middle region 2112b, the cathode assembly 214 generates electrons and moves in the direction of the anode assembly 215, and the closed magnetic circuit disturbs the moving electrons, so that the electrons oscillate in a set direction to generate microwaves.

[0100] 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.

[0101] In the present invention, the above-mentioned cooking utensil is a microwave oven (in other embodiments, the cooking utensil is a microwave oven, etc.), and the structure of other parts of the cooking utensil please refer to the prior art, and this application will not elaborate on it here.

[0102] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A magnetron, characterized in that: 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, characterized in that: 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, characterized in that: 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, characterized in that: 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, characterized in that: 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, characterized in that: 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, characterized in that: 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, characterized in that: 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, characterized in that: 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 utensil, characterized in that: The cooking appliance comprises the magnetron according to any one of claims 1 to 9.

Images