A cooking appliance

Abstract

The embodiment of the present application discloses a cooking utensil, which comprises a cavity wall, a waveguide and a microwave generating assembly. The cavity wall is surrounded by a cavity, and a plurality of microwave introduction areas are arranged on the cavity wall. Each microwave introduction area comprises a microwave feed inlet penetrating through the cavity wall, and each microwave introduction area is located at a different side of the cavity. The waveguide is arranged outside the cavity wall and defines a waveguide channel with the outer wall of the cavity wall. The waveguide channel is connected with each microwave introduction area. The microwave generating assembly is arranged on the waveguide and located at one side of the cavity wall in the horizontal direction. The microwave generated by the microwave generating assembly can enter the waveguide channel. The cooking utensil of the embodiment of the present application is beneficial to improve the heating uniformity of the cooking utensil, and is also beneficial to improve the volume rate of the cooking utensil.

Description

[0001] Cross-references to related applications

[0002] This application is based on and claims priority to Chinese Patent Application No. 202510505202.X, filed on April 21, 2025, the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application relates to the field of microwave device technology, and more particularly to a cooking appliance. Background Technology

[0004] Microwave ovens use microwaves to heat food inside. In related technologies, microwave ovens use a stirring device to change the direction of microwave emission, thereby improving the uniformity of microwave distribution within the oven. However, this type of microwave oven still has a large microwave distribution blind zone inside, resulting in poor heating uniformity. Furthermore, the stirring device has a relatively complex structure, occupies a large space in the microwave oven, and leads to a relatively low volumetric efficiency. Utility Model Content

[0005] In view of this, the present application aims to provide a cooking appliance that is conducive to improving the heating uniformity of the cooking appliance, and at the same time, also conducive to improving the volume ratio of the cooking appliance.

[0006] To solve the above problems, the technical solution of this application embodiment is implemented as follows: This application provides a cooking appliance, including: A cavity wall is formed by surrounding a cavity. Multiple microwave induction areas are provided on the cavity wall. Each microwave induction area includes a microwave feed inlet that penetrates the cavity wall. Each microwave induction area is located on a different side of the cavity. A waveguide is disposed on the outer side of the cavity wall and defines a waveguide channel with the outer side wall of the cavity wall, the waveguide channel connecting each of the microwave introduction areas; A microwave generating assembly for generating microwaves is disposed on the waveguide and located on one side of the cavity wall in the horizontal direction. The microwaves generated by the microwave generating assembly can enter the waveguide channel.

[0007] In some embodiments, the plurality of microwave induction regions include a first microwave induction region and a second microwave induction region, wherein the perpendicular line from the side containing the first microwave induction region intersects the perpendicular line from the side containing the second microwave induction region.

[0008] In some embodiments, the cavity wall includes a top cavity wall and a bottom cavity wall spaced apart along the height direction of the cooking appliance, and the plate body on the other side of the cavity wall, excluding the top cavity wall and the bottom cavity wall, is the cavity sidewall; The microwave feed inlet of the first microwave inlet region is a first microwave feed inlet, which is located on the top wall or the bottom wall of the cavity. The microwave feed inlet of the second microwave inlet region is a second microwave feed inlet, which is located on the side wall of the cavity.

[0009] In some embodiments, the sum of the areas of each of the first microwave feed ports is greater than the sum of the areas of each of the second microwave feed ports.

[0010] In some embodiments, the sum of the areas of each of the first microwave feed ports is 3 to 5 times the sum of the areas of each of the second microwave feed ports.

[0011] In some embodiments, the number of first microwave feed ports is not less than two.

[0012] In some embodiments, the straight line connecting two points on the edge of the first microwave feed inlet is the first connecting line, and the first connecting line that is entirely within the range of the first microwave feed inlet and has the longest length is the maximum aperture of the first microwave feed inlet. At least two of the first microwave feed inlets have different maximum aperture sizes.

[0013] In some embodiments, the maximum aperture size of any two of the first microwave feed inlets is different.

[0014] In some embodiments, the first microwave feed inlet is formed by multiple sides, with the connection point of two adjacent sides forming a vertex.

[0015] In some embodiments, the cavity top wall or the cavity bottom wall includes four quadrant regions, and each quadrant region is provided with at least one of the first microwave feed inlets; The four quadrants are four quadrants defined by two coordinate axes in a two-dimensional rectangular coordinate system.

[0016] In some embodiments, the first microwave feed inlets corresponding to the four quadrant regions are arranged axially symmetrically with respect to the coordinate axes and / or centrally symmetrically with respect to the origin of the four quadrant regions.

[0017] In some embodiments, the first microwave inlet region further includes a circular first microwave feed inlet, the center of which overlaps with the origin of the four quadrant regions.

[0018] In some embodiments, the number of second microwave feed ports is not less than two.

[0019] In some embodiments, the longitudinal axes of at least two of the second microwave feed inlets intersect.

[0020] In some embodiments, in the height direction of the cooking appliance, the center-to-center distance between the uppermost second microwave feed inlet and an adjacent second microwave feed inlet is one-quarter of the microwave wavelength; and / or, At least two second microwave feed inlets are spaced apart along the height direction of the cooking appliance.

[0021] In some embodiments, the microwave generating assembly includes an antenna cap, a microwave inlet area on one side of the antenna cap being a second microwave inlet area, a microwave feed inlet in the second microwave inlet area being a second microwave feed inlet, and the distance between the center of the antenna cap and the center of at least one second microwave feed inlet in the height direction of the cooking appliance being half the wavelength of the microwave.

[0022] In some embodiments, the cooking appliance further includes a partition, the cavity wall includes a cavity bottom wall, the microwave induction area on the cavity bottom wall is a first microwave induction area, the microwave feed inlet of the first microwave induction area is a first microwave feed inlet, in the height direction of the cooking appliance, the cavity bottom wall forms the boundary of the bottom side of the cavity, and the partition is disposed on the side of the cavity bottom wall facing the cavity and forms an empty space between it and the cavity bottom wall.

[0023] In some embodiments, the cavity bottom wall includes a first recess and an annular first platform, the first platform surrounding the outer periphery of the first recess, the first recess recessing downward from the inner edge of the first platform, the bottom wall of the first recess having one or more first microwave feed inlets, and the partition being disposed within the first recess.

[0024] In some embodiments, the distance between the partition and the bottom wall of the first recess is not less than 5 mm.

[0025] In some embodiments, the cavity wall includes a cavity bottom wall, the microwave induction region on the cavity bottom wall is a first microwave induction region, the microwave feed inlet of the first microwave induction region is a first microwave feed inlet, and a portion of the cavity bottom wall protrudes into the waveguide channel to form one or more first protrusions, and the first microwave feed inlet is formed in the first protrusion.

[0026] In some embodiments, the distance between the first microwave feed inlet and the plane containing the cavity bottom wall is 1mm to 30mm.

[0027] In some embodiments, the distance between the first microwave feed inlet and the plane containing the cavity bottom wall is 2mm to 8mm.

[0028] In some embodiments, the cooking appliance further includes a partition disposed above the bottom wall of the cavity, the partition being used to place food; The distance between the partition and the cavity bottom wall is the first distance, and the distance between the first microwave feed inlet and the plane where the cavity bottom wall is located is the second distance. The ratio of the first distance to the second distance is 1.2 to 1.8.

[0029] In some embodiments, the minimum distance between the edge of the projection of the first microwave feed inlet and the edge of the projection of the first protrusion in the orthographic projection of the plane containing the cavity bottom wall is 1mm to 30mm.

[0030] In some embodiments, the minimum distance between the edge of the projection of the first microwave feed inlet and the edge of the projection of the first protrusion in the orthographic projection of the plane containing the cavity bottom wall is 2mm to 10mm.

[0031] In some embodiments, the first protrusion is constricted in the direction from the plane of the cavity bottom wall toward the waveguide channel.

[0032] In some embodiments, the distance between the two endpoints of the longest side of at least one of the microwave feed inlets is not less than 65 mm, for transmitting microwaves with frequencies above 2.4 GHz; and / or, The spacing between the two endpoints of the longest side of at least one of the microwave feed inlets is between 55 mm and 65 mm, for transmitting microwaves with frequencies above 2.433 GHz; and / or, The distance between the two endpoints of the longest side of at least one of the microwave feed inlets is no greater than 55 mm, for transmitting microwaves with a frequency of 2.466 GHz or higher. In some embodiments, at least a portion of the microwave feed inlet is formed by multiple sides; wherein the distance between the two endpoints of the longest side of the portion of the microwave feed inlet is 40mm-65mm; and / or, the distance between the two endpoints of the shortest side of the portion of the microwave feed inlet is not less than 10mm.

[0033] In this embodiment of the cooking appliance, microwaves can be fed into the cooking cavity from at least two sides. The microwaves fed from these two sides work synergistically to cover at least a portion of areas that the other side cannot reach. This improves the microwave coverage area within the cooking cavity, thereby enhancing heating uniformity. Furthermore, the cooking appliance can improve heating uniformity without requiring a stirring device. Therefore, while maintaining the overall size of the appliance, it allows for an increase in the volume of the cooking cavity, thus improving the appliance's volumetric efficiency. Additionally, since the waveguide channel connects all microwave inlet areas, a single waveguide component can meet the requirements, facilitating control over the number of waveguide components and reducing the number of parts required for assembly, thereby improving production efficiency. Simultaneously, since microwaves entering the waveguide channel can be fed from different sides of the cooking cavity, only a single microwave generating component is needed, further facilitating control over the number of microwave generating components. This reduces production costs and also helps control the space occupied by the microwave generating components, further improving the appliance's volumetric efficiency. Attached Figure Description

[0034] Figure 1 An exploded view of a portion of the structure of a cooking utensil in the related technology; Figure 2 This is a schematic diagram of the structure of the cooking appliance according to the first embodiment of this application; Figure 3 for Figure 2 The schematic diagram of the cooking appliance in the embodiment shown is provided, in which the top wall and part of the side wall of the cavity are not shown. Figure 4 This is a schematic diagram of the assembly structure of a microwave generating component, waveguide, cavity top wall, and cavity sidewall according to an embodiment of this application; Figure 5 This is a schematic diagram of the arrangement of the second microwave feed inlet according to the first embodiment of this application; Figure 6 This is a schematic diagram of the arrangement of the second microwave feed inlet according to the second embodiment of this application; Figure 7 This is a schematic diagram of the arrangement of the second microwave feed inlet according to the third embodiment of this application; Figure 8 This is a schematic diagram of the arrangement of the second microwave feed inlet according to the fourth embodiment of this application; Figure 9 This is a schematic diagram of the arrangement of the second microwave feed inlet according to the fifth embodiment of this application; Figure 10 This is a schematic diagram of the arrangement of the second microwave feed inlet according to the sixth embodiment of this application; Figure 11 This is a schematic diagram of the arrangement of the second microwave feed inlet according to the seventh embodiment of this application; Figure 12 This is a schematic diagram of the arrangement of the second microwave feed inlet according to the eighth embodiment of this application; Figure 13 This is a schematic diagram of the arrangement of the second microwave feed inlet according to the ninth embodiment of this application; Figure 14 This is a schematic cross-sectional view of a cooking appliance according to an embodiment of this application, perpendicular to the front-to-back direction. Figure 15 for Figure 14 Enlarged view of point A in the middle; Figure 16 This is a schematic diagram of the structure of the cooking appliance according to the second embodiment of this application; Figure 17 For along Figure 16 A schematic diagram of the cross-sectional structure obtained by cutting along the section line shown in B; Figure 18 This is a schematic diagram of the structure of the cooking appliance according to the third embodiment of this application; Figure 19 For along Figure 18 A schematic diagram of the cross-sectional structure obtained by cutting along the section line shown in C; Figure 20 This is a schematic diagram of the cavity bottom wall of the cooking appliance according to the fourth embodiment of this application; Figure 21 for Figure 20 A diagram from another perspective; Figure 22 for Figure 20 A schematic diagram of the cross-sectional structure obtained by cutting along the section line shown in D.

[0035] Explanation of reference numerals in the attached figures 100. Cooking appliance; 100a. Empty space; 10. Cavity wall; 10a. Cavity; 10b. Microwave feed inlet; 11. Cavity top wall; 12. Cavity bottom wall; 12a. First microwave feed inlet; 121. First recess; 122. First platform; 123. First protrusion; 13. Cavity side wall; 13a. Second microwave feed inlet; 20. Waveguide; 30. Microwave generating assembly; 31. Antenna cap; 40. Partition. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solutions of this application, and are therefore only examples, and should not be used to limit the scope of protection of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0037] In the description of the embodiments of this application, technical terms such as "first," "second," and "third" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0038] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0039] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects are in an "or" relationship.

[0040] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances.

[0041] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the technical term "contact" should be interpreted broadly, and can be direct contact, contact through an intermediate medium layer, contact between two contacting parties with substantially no interaction force, or contact between two contacting parties with interaction force.

[0042] The present application will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0043] Figure 1 An exploded view of a portion of the structure of a cooking appliance 100' (microwave oven) in the related art is shown. Please refer to... Figure 1The cooking appliance 100' (microwave oven) in the related technology includes a cavity wall 10', a waveguide 20', a microwave generating assembly 30', and a stirring device 40'. The stirring device 40' includes a motor 43', a motor bracket 42', and a stirring antenna 41'. A waveguide channel is defined between the waveguide 20' and the cavity wall 10'. Microwaves emitted by the microwave generating assembly 30' are fed into the cooking cavity from the bottom of the cavity wall 10' through the waveguide channel. The stirring antenna 41' is provided with a microwave feed inlet. The motor 43' drives the stirring antenna 41' to rotate to change the position of the microwave feed inlet, thereby changing the direction of the microwaves fed into the cooking cavity through the microwave feed inlet. This allows the microwaves to reach more areas within the cooking cavity, improving the uniformity of heating within the cooking cavity. However, in this type of cooking appliance 100' (microwave oven), there are often dead zones in the microwave coverage area at the four corners of the bottom of the cavity wall 10'. That is, there are still large microwave distribution blind spots in the cooking cavity, resulting in poor heating uniformity. In addition, the motor and stirring antenna need to move continuously, which requires sufficient space for movement, thus occupying a large space in the microwave oven, making the volume ratio of the cooking appliance 100' (microwave oven) relatively low.

[0044] In view of this, please refer to Figures 2 to 15 This application provides a cooking appliance 100, which includes a cavity wall 10, a waveguide 20, and a microwave generating assembly 30.

[0045] The specific type of cooking appliance 100 is not limited in this application. For example, it can be a microwave oven, such as a flatbed microwave oven, a turntable microwave oven, or a built-in microwave oven, etc.

[0046] It should be noted that in some embodiments, the cavity wall 10 may also be referred to as a housing, and the microwave generating assembly 30 may also be referred to as a magnetron.

[0047] A cavity 10 is formed by a cavity wall 10. Multiple microwave induction regions are provided on the cavity wall 10, each including a microwave feed inlet 10b that penetrates the cavity wall 10. Here, the microwave feed inlet 10b can also be referred to as a microwave feed port. It can be understood that the microwave induction region is the collection of all microwave feed inlets 10b on one side of the cavity wall 10 of the cavity 10a. That is, all microwave feed inlets 10b on the same side of the cavity 10a are collectively referred to as a microwave induction region.

[0048] Each microwave guiding region is located on a different side of the cavity 10a. For example, the cavity 10a has a cuboid structure, in which case the cavity 10a has six sides, wherein microwave guiding regions are provided on at least two sidewalls. Here, the specific location of these two sides on the cavity 10a is not limited. For example, they could be opposite sides of the cavity 10a, or adjacent sides of the cavity 10a.

[0049] The microwave feed inlet 10b penetrates the cavity wall 10 of the cavity 10a. In this way, microwaves outside the cavity wall 10 can enter the cavity 10a through the microwave feed inlet 10b.

[0050] The waveguide 20 is disposed on the outer side of the cavity wall 10 and defines a waveguide channel with the outer wall of the cavity wall 10, the waveguide channel connecting each microwave introduction area. The waveguide channel can also be called a microwave channel. Here, the waveguide channel is located outside the cavity wall 10.

[0051] For example, please refer to Figure 2 and Figure 3 There are two microwave induction zones, one is a first microwave induction zone and the other is a second microwave induction zone. The first microwave induction zone and the second microwave induction zone are connected to the same waveguide channel. Here, a waveguide channel is formed by a waveguide component 20 and a cavity wall 10, and the two microwave induction zones are connected through this waveguide channel. In this way, the number of waveguide components 20 that need to be assembled during the assembly process of the cooking appliance 100 is reduced, which helps to improve the production efficiency of the cooking appliance 100.

[0052] It is understandable that when the first microwave induction region and the second microwave induction region are located on the opposite sides of the wall of the cavity 10a, the waveguide 20 has a roughly "U" shaped structure; when the first microwave induction region and the second microwave induction region are located on the adjacent sides of the wall of the cavity 10a, the waveguide 20 has a roughly "L" shaped structure.

[0053] Since the first microwave induction area and the second microwave induction area are located on different sides of the cavity 10a, microwaves can be introduced from different sides of the cavity 10a. The microwaves introduced from at least two sides of the cavity 10a work together to cover at least part of the area that the other cannot cover. This is beneficial to increasing the coverage area of ​​microwaves inside the cavity 10a, thereby improving the uniformity of heating.

[0054] Meanwhile, by introducing microwaves from at least both sides of the cavity 10a, the uniformity of heating in the cooking appliance 100 can be improved. Therefore, the cooking appliance 100 can be made without a stirring device. Thus, without changing the overall size of the cooking appliance 100, the volume of the cooking cavity can be increased, thereby improving the volumetric efficiency of the cooking appliance 100. Furthermore, since motors have certain reliability issues, eliminating the motor in the cooking appliance 100 eliminates the failure rate caused by motor malfunctions, thereby improving the reliability of the cooking appliance 100.

[0055] The microwave generating component 30 is used to generate microwaves. The microwave generating component 30 is disposed on the waveguide 20 and located on one side of the cavity wall 10 in the horizontal direction. The microwaves generated by the microwave generating component 30 can enter the waveguide channel. There can be only one microwave generating component 30; that is, the microwaves generated by one microwave generating component 30 can be fed into the cavity 10a from the first microwave induction area and the second microwave induction area respectively. This allows for reasonable control of the number of microwave generating components 30, reducing the production cost of the cooking appliance 100. Furthermore, without adding additional microwave generating components 30, the overall volume occupied by the microwave generating components 30 in the cooking appliance 100 can be reasonably controlled, thus ensuring the volume ratio of the cooking appliance 100.

[0056] It should be noted that the specific location indicated by one side of the cavity wall 10 in the horizontal direction needs to be understood based on the location of the cooking appliance 100 in normal use.

[0057] In the cooking appliance 100 of this application embodiment, microwaves can be fed in from at least both sides of the cooking cavity. The microwaves fed in from at least both sides of the cooking cavity can work together to cover at least part of the areas that the other cannot cover. This is beneficial to increasing the coverage area of ​​microwaves inside the cooking cavity, thereby improving the uniformity of heating. At the same time, the cooking appliance 100 can improve the uniformity of heating without the need for a stirring device. Therefore, without changing the overall size of the cooking appliance 100, it is beneficial to increase the volume of the cooking cavity, that is, to increase the volume ratio of the cooking appliance 100. Furthermore, since the waveguide channel can connect various microwave induction areas, one waveguide component 20 is sufficient to meet the requirements, making it easy to control the number of waveguide components 20. This helps to reduce the number of parts required to be assembled in the cooking appliance 100, thereby improving the production efficiency of the cooking appliance 100. At the same time, the microwaves entering the waveguide channel can be fed in from different sides of the cooking cavity, so only one microwave generating component 30 is needed to meet the requirements. This makes it easy to control the number of microwave generating components 30, thereby reducing the production cost of the cooking appliance 100 and also helping to control the space occupied by the microwave generating components 30, thereby improving the volume ratio of the cooking appliance 100.

[0058] In some embodiments, please refer to Figures 2 to 12 The shape of the microwave feed inlet 10b includes at least one of the following: circular, arc-shaped, rectangular, and semi-circular.

[0059] For example, based on the circular microwave feed inlet 10b, microwaves of larger frequencies and wavelengths can pass through at multiple angles of the microwave feed inlet 10b, which helps to improve the heating uniformity of the food at various angles.

[0060] For example, microwave feed inlets 10b with shapes such as arc, rectangle and semicircle can be used at certain specific angles to allow microwaves with larger frequencies and wavelengths to pass through, thus meeting the heating efficiency requirements of microwave ovens. At the same time, the size of microwave feed inlets 10b can be controlled at other angles, and more microwave feed inlets 10b can be provided if the size of the plate on one side of the cavity wall 10 is fixed.

[0061] For example, the microwave feed inlet 10b with a rectangular shape is easier to manufacture and easier to produce.

[0062] In some embodiments, please refer to Figures 2 to 12 At least part of the microwave feed inlet 10b is formed by multiple sides.

[0063] Here, the edge can be a straight line or a curved line. The edge of the microwave feed inlet 10b refers to the line between two adjacent vertices along the circumference of the microwave feed inlet 10b.

[0064] For example, when the microwave feed inlet 10b is fan-shaped, it has three sides, one of which is an arc and the other two are straight lines.

[0065] For example, when the microwave feed inlet 10b is fan-shaped, it has four sides, two of which are arcs and the other two are straight lines.

[0066] For example, when the microwave feed inlet 10b is rectangular, it has four sides, and all four sides are straight lines.

[0067] The distance between the two endpoints of the longest side of the microwave feed inlet 10b is 40mm-65mm, for example, it can be 40mm, 41mm, 43mm, 45mm, 47mm, 49mm, 50mm, 52mm, 54mm, 56mm, 58mm, 60mm, 61mm, 63mm, 65mm, etc. This facilitates the opening of the microwave feed inlet 10b on each side of the cavity wall 10, avoiding the problem of the microwave feed inlet 10b penetrating one or both sides of the cavity wall 10 in the width direction, thereby helping the microwaves to be stably and reliably fed into the cooking cavity.

[0068] The distance between the two endpoints of the shortest side of the microwave feed inlet 10b is not less than 10mm. For example, it can be 10mm, 12mm, 14mm, 16mm, 18mm, 20mm, 22mm, 25mm, 30mm, etc. This helps to ensure the distance between two adjacent vertices in the circumferential direction of the microwave feed inlet 10b, and helps to improve the arcing problem that occurs between the two vertices.

[0069] The extension length of each side of the microwave feed inlet 10b refers to the length dimension after stretching the side into a straight line. For example, when calculating the extension length based on a curved side, it is necessary to straighten the curved side and then measure it.

[0070] The longest side of microwave feed 10b refers to the side with the longest extension among all the sides of microwave feed 10b. The shortest side of microwave feed 10b refers to the side with the shortest extension among all the sides of microwave feed 10b.

[0071] It is understandable that, based on the rectangular shape of the microwave feed inlet 10b, its longest side is the long side of the rectangle, and its shortest side is the wide side of the rectangle.

[0072] In some embodiments, please refer to Figures 2 to 4 Multiple microwave induction zones include a first microwave induction zone and a second microwave induction zone.

[0073] It should be noted that the specific positional relationship between the first microwave induction region and the second microwave induction region on the cavity 10a is not limited.

[0074] For example, the perpendicular line from the side containing the first microwave induction region intersects the perpendicular line from the side containing the second microwave induction region. That is, the side containing the first microwave induction region and the side containing the second microwave induction region are adjacent.

[0075] In this way, roughly orthogonal microwaves are formed within the cooking cavity. This has two advantages: firstly, it allows for a more complex electromagnetic field distribution within the cooking cavity, thereby improving the uniformity of the electromagnetic field distribution, reducing microwave blind spots, and enhancing the uniformity of heating; secondly, it can, to some extent, mitigate the problem of excessively strong or weak local energy caused by uneven electromagnetic fields, thus improving the utilization rate of microwave energy and reducing energy loss.

[0076] For example, the first microwave induction region and the second microwave induction region can also be located on opposite sides of the cavity 10a.

[0077] Specifically, the first microwave induction area and the second microwave induction area are located on opposite sides of the cavity 10a along the height direction of the cooking appliance 100, as an example: Microwaves fed through the first microwave induction zone and microwaves fed through the second microwave induction zone can enter the food from the top and bottom sides respectively, thus achieving more uniform heating of the food from both the top and bottom sides.

[0078] It should be noted that the height and orientation of the cooking utensil 100 should be understood based on its position and orientation when in normal use, as follows: Figure 2 As shown in H.

[0079] In some embodiments, please refer to Figures 2 to 4 The cavity wall 10 includes a cavity top wall 11 and a cavity bottom wall 12 spaced apart along the height direction of the cooking appliance 100. The plate on the other side of the cavity wall 10, excluding the cavity top wall 11 and the cavity bottom wall 12, is a cavity side wall 13. The microwave feed inlet 10b of the first microwave inlet area is a first microwave feed inlet 12a, which is located on the cavity top wall 11 or the cavity bottom wall 12. The microwave feed inlet 10b of the second microwave inlet area is a second microwave feed inlet 13a, which is located on the cavity side wall 13.

[0080] Here, the cavity top wall 11 can also be called the top plate, the cavity bottom wall 12 can also be called the bottom plate, and the cavity side wall 13 can also be called the side plate.

[0081] In this way, the food can receive microwave radiation effectively both at the top and bottom and in the radial direction, thus improving the overall heating uniformity of the food. It should be noted that the top and bottom direction of the food is the same as the height direction of the cooking appliance 100, and the radial direction of the food refers to the direction perpendicular to the top and bottom direction of the food.

[0082] Furthermore, based on the turntable microwave oven, the food is carried on the turntable, and the turntable rotates and drives the food to rotate, so that all parts of the food in the circumferential direction can be well affected by the microwaves fed in through the second microwave feed inlet 13a, while the food in the top and bottom direction can be well affected by the microwaves fed in through the first microwave feed inlet 12a. Thus, the overall heating uniformity of the food is better.

[0083] In some embodiments, please refer to Figures 2 to 4 The number of first microwave feed inlets 12a shall not be less than two. For example, there may be 2, 3, 4, 5, 6, etc.

[0084] In some embodiments, please refer to Figures 2 to 4 The spacing between the two endpoints of the longest side of at least one of the microwave feed inlets 10b is not less than 65 mm, for passing microwaves with a frequency of 2.4 GHz or higher.

[0085] It should be noted that the distance between the two endpoints of the longest side of the microwave feed inlet 10b can be referred to as the feed length.

[0086] For example, the distance between the two endpoints of the longest side of the microwave feed 10b can also be referred to as the maximum aperture of the microwave feed 10b. The straight line connecting two points on the edge of the microwave feed 10b is the first connecting line. The first connecting line, which is entirely within the range of the microwave feed 10b and has the longest length, is the maximum aperture of the microwave feed 10b.

[0087] Here, it can be a first microwave feed inlet 12a including at least one longest side with a spacing of not less than 65 mm between the two endpoints; it can also be a second microwave feed inlet 13a including at least one longest side with a spacing of not less than 65 mm between the two endpoints; it can also be a first microwave feed inlet 12a including at least one longest side with a spacing of not less than 65 mm between the two endpoints, and a second microwave feed inlet 13a including at least one longest side with a spacing of not less than 65 mm between the two endpoints.

[0088] In one specific embodiment, when there are multiple first microwave feed inlets 12a, the feed length of at least one of the multiple first microwave feed inlets 12a is not less than 65mm, for passing microwaves with a frequency of 2.4GHz or higher.

[0089] In some embodiments, please refer to Figures 2 to 4 The spacing between the two endpoints of the longest side of at least one of the microwave feed inlets 10b is between 55 mm and 65 mm, for transmitting microwaves with frequencies above 2.433 GHz.

[0090] Here, it can be a first microwave feed inlet 12a, which includes at least one longest side with a spacing between the two endpoints and between 55mm and 65mm; it can also be a second microwave feed inlet 13a, which includes at least one longest side with a spacing between the two endpoints and between 55mm and 65mm; it can also be a first microwave feed inlet 12a, which includes at least one longest side with a spacing between the two endpoints and between 55mm and 65mm, and a second microwave feed inlet 13a, which includes at least one longest side with a spacing between the two endpoints and between 55mm and 65mm.

[0091] In one specific embodiment, when there are multiple first microwave feed ports 12a, the feed port length of at least one of the multiple first microwave feed ports 12a is between 55mm and 65mm, for passing microwaves with a frequency of 2.433GHz or higher.

[0092] In some embodiments, please refer to Figures 2 to 4 The spacing between the two endpoints of the longest side of at least one of the microwave feed inlets 10b is no greater than 55 mm, for passing microwaves with a frequency of 2.466 GHz or higher.

[0093] Here, it can be a first microwave feed inlet 12a including at least one longest side with a spacing dimension of no more than 55 mm between the two endpoints; it can also be a second microwave feed inlet 13a including at least one longest side with a spacing dimension of no more than 55 mm between the two endpoints; it can also be a first microwave feed inlet 12a including at least one longest side with a spacing dimension of no more than 55 mm between the two endpoints, and a second microwave feed inlet 13a including at least one longest side with a spacing dimension of no more than 55 mm between the two endpoints.

[0094] In one specific embodiment, when there are multiple first microwave feed inlets 12a, the feed length of at least one of the multiple first microwave feed inlets 12a is not greater than 55mm, and it is used to transmit microwaves with a frequency of 2.466GHz or higher.

[0095] The following example illustrates the situation when there are multiple first microwave feed inlets 12a.

[0096] For example, the spacing between the two endpoints of the longest side of at least one of the plurality of first microwave feed inlets 12a is not less than 65 mm for passing microwaves with a frequency of 2.4 GHz or higher; and / or, the spacing between the two endpoints of the longest side of at least one of the plurality of first microwave feed inlets 12a is between 55 mm and 65 mm for passing microwaves with a frequency of 2.433 GHz or higher; and / or, the spacing between the two endpoints of the longest side of at least one of the plurality of first microwave feed inlets 12a is not greater than 55 mm for passing microwaves with a frequency of 2.466 GHz or higher.

[0097] It should be noted that when the microwave oven is operating in a hot state, the hot frequency of its microwave generating component 30 changes randomly. Based on the microwave frequency cutoff wavelength theory, dynamic control of the microwave field can be achieved. The feed port length and microwave frequency satisfy the following formula:

[0098] in, The cutoff wavelength, Where c is the cutoff frequency, m and n represent the number of times the battery changes during the first half of the waveguide's wide and narrow sides, a is the dimension of the wide side (length), and b is the dimension of the narrow side (width).

[0099] In other words, only microwave frequencies greater than or equal to Only microwaves of that frequency can pass through at that time; microwaves of other frequencies are blocked and cannot pass through. It should be noted that the electromagnetic wave propagation in the waveguide channel is a rectangular waveguide, and the dominant wave of the rectangular waveguide is TE. 10 The mode, i.e., the variation period of the short side, is 0. Therefore, by setting the first microwave feed inlet 12a with different feed lengths, the frequency of the microwave can be selected.

[0100] For example, the thermal frequency of the microwave generating component 30 varies between 2.4 GHz and 2.5 GHz.

[0101] For example, the shape of the first microwave feed inlet 12a can be an arc-shaped opening. An arc-shaped opening means that at least one edge of the side it encloses is an arc edge, such as... Figure 4 As shown.

[0102] For example, please refer to Figure 2 and Figure 4 Taking an arc-shaped aperture as an example, among the multiple first microwave feed ports 12a, those with a feed port length of not less than 65mm are primary feed ports, those with a feed port length between 55mm and 65mm are secondary feed ports, and those with a feed port length of not more than 55mm are sub-feed ports. There can be one primary feed port, two secondary feed ports, and one sub-feed port. The two secondary feed ports can be diagonally distributed on the cavity bottom wall 12, and the primary feed port and the sub-feed port can be diagonally distributed on the cavity bottom wall 12, so that the two secondary feed ports, one primary feed port, and one sub-feed port occupy the four corners of the cavity bottom wall 12.

[0103] Here, when the microwave frequency is below 2.4 GHz, it cannot be emitted from the first microwave feed inlet 12a with a feed length of not less than 65 mm, between 55 mm and 65 mm, or not greater than 55 mm. When the microwave frequency is between 2.4 GHz and 2.433 GHz, it can only be emitted from the first microwave feed inlet 12a with a feed length of not less than 65 mm. When the microwave frequency is between 2.433 GHz and 2.466 GHz, it can be emitted from the first microwave feed inlet 12a with a feed length of not less than 65 mm and between 55 mm and 65 mm. When the microwave frequency is above 2.466 GHz, it can be emitted from the first microwave feed inlet 12a with a feed length of not less than 65 mm, between 55 mm and 65 mm, or not greater than 55 mm. In this way, microwaves at different cutoff frequencies can be output from the first microwave feed inlet 12a with different feed lengths, and the output can be alternated, which can improve the uniformity of coverage in the corner area of ​​the cooking cavity and improve heating uniformity.

[0104] In some embodiments, please refer to Figures 2 to 4 The cavity top wall 11 or cavity bottom wall 12 includes four quadrant regions, each quadrant region having at least one first microwave feed inlet 12a; wherein, the four quadrant regions are four quadrant regions defined by two coordinate axes in a two-dimensional rectangular coordinate system. That is to say, the number of first microwave feed inlets 12a is not less than 4. For example, it can be 5, 6, etc.

[0105] The following example illustrates the situation with the first microwave feed inlet 12a located on the bottom wall 12 of the cavity.

[0106] A Cartesian coordinate system is established with a point on the bottom wall 12 of the cavity as the center. The x-axis of the Cartesian coordinate system can be parallel to the length direction of the bottom wall 12, and the y-axis can be parallel to the width direction of the bottom wall 12. At least one first microwave feed inlet 12a is distributed in each of the four quadrants of this Cartesian coordinate system. In this way, when the food is placed on the center for heating, it can be subjected to microwaves on the same horizontal plane, which helps to improve the heating uniformity of the food on the same horizontal plane.

[0107] The cavity bottom wall 12 is generally rectangular in shape and has dimensions in the length direction, width direction, and thickness direction, with the length direction dimension > width direction dimension > thickness direction dimension.

[0108] It should be noted that the specific location of the center of the circle is not restricted.

[0109] For example, the center of the circle can be located at the center of the bottom wall 12 of the cavity, that is, at the intersection of the two diagonals of the bottom wall 12. During the heating process, the food is generally placed in the central area of ​​the bottom wall of the cooking cavity for heating. Since the center of the bottom wall 12 of the cavity is close to the center of the bottom wall of the cooking cavity, it is more conducive to the uniform coverage of the bottom surface of the food by each first microwave feed inlet 12a. Further, in some embodiments, please refer to Figure 14 and Figure 15 The cavity bottom wall 12 includes a first recess 121, and a first microwave feed inlet 12a is opened on the bottom wall of the first recess 121. Here, the center can be located at the center of the bottom wall of the first recess 121.

[0110] For example, in a turntable microwave oven, the center of the circle can also be located on the axis of the motor shaft. This also makes it easier for each of the first microwave feed inlets 12a to evenly cover the bottom surface of the food.

[0111] In some embodiments, please refer to Figures 2 to 4 The first microwave feed inlets 12a corresponding to the four quadrants are arranged axially symmetrically with respect to the coordinate axes and / or centrally symmetrically with respect to the origin of the four quadrants. In this way, the first microwave feed inlets 12a in the four quadrants can be evenly distributed, which can further improve the uniformity of microwave distribution in the cooking cavity.

[0112] It should be noted that the above technical solutions include at least the following.

[0113] The first type: The first microwave feed inlet 12a corresponding to the four quadrant regions is arranged symmetrically with respect to the coordinate axes.

[0114] The second type: The first microwave feed inlet 12a corresponding to the four quadrants is arranged in a centrally symmetrical manner with respect to the origin of the four quadrants; The third type: The first microwave feed inlet 12a corresponding to the four quadrants is arranged axially symmetrically with respect to the coordinate axes and also centrally symmetrically with respect to the origin of the four quadrants.

[0115] In some embodiments, please refer to Figures 2 to 4 The first microwave inlet region also includes a circular first microwave feed inlet 12a, the center of which overlaps with the origin of the four quadrant regions.

[0116] Here, the circular first microwave feed inlet 12a constitutes an adjustable feed inlet. By setting an adjustable feed inlet in the first microwave inlet area, the intensity of microwave energy in the lower part can be increased. In this way, the overall radiation uniformity of the first microwave inlet area can be improved, resulting in good heating uniformity.

[0117] By setting adjustable feed ports within the area enclosed by the four first microwave feed ports 12a, the overall radiation uniformity and heating uniformity can be improved.

[0118] In some embodiments, please refer to Figures 2 to 4 The straight line connecting two points on the edge of the first microwave feed 12a is the first connecting line. The first connecting line, which is entirely within the range of the first microwave feed 12a and has the longest length, is the maximum aperture of the first microwave feed 12a. At least two first microwave feeds 12a have different maximum apertures.

[0119] In other words, the diameters or the dimensions of the longest side of at least the two first microwave feed inlets 12a are different.

[0120] It is understood that the first microwave feed inlet 12a with the first connection mentioned above is the microwave feed inlet 10b formed by multiple sides.

[0121] "All within the range of the first microwave feed inlet 12a" means that the entire path traversed by the first connecting line is within the area enclosed by the first microwave feed inlet 12a.

[0122] In this embodiment, at least two first microwave feed inlets 12a can pass microwaves of different frequencies. The microwaves generated by the microwave generating component 30 can pass through at least two first microwave feed inlets 12a respectively, so that the upper surface of the food can also be heated evenly, achieving the effect of uniform cooking.

[0123] In some embodiments, please refer to Figures 2 to 4 The maximum aperture size of any two first microwave feed inlets 12a is different. In other words, the diameter or the length of the longest side of any two first microwave feed inlets 12a is different.

[0124] That is, the maximum diameter of all the first microwave feed inlets 12a is different. In this way, each first microwave feed inlet 12a can pass microwaves of different frequencies, which is beneficial to further achieve a uniform heating effect within the cooking cavity.

[0125] In some embodiments, please refer to Figures 2 to 4 The first microwave feed inlet 12a is formed by multiple sides, with the connection between two adjacent sides forming a vertex.

[0126] The definitions of the sides, the extension length of the sides, the definition of the longest side, and the definition of the shortest side of the first microwave feed inlet 12a are all understood with reference to the explanation in the microwave feed inlet 10b, and will not be repeated here.

[0127] The longest side of the first microwave feed inlet 12a extends less than the width of the top wall 11 or the bottom wall 12 of the cavity, and is greater than or equal to 40 mm. This facilitates the opening of the first microwave feed inlet 12a on the top wall 11 or the bottom wall 12 of the cavity, avoiding the problem of the first microwave feed inlet 12a penetrating one or both sides of the top wall 11 or the bottom wall 12 of the cavity in the width direction, thereby helping the microwaves to be stably and reliably fed into the cooking cavity.

[0128] The extension length of the shortest side of the first microwave feed inlet 12a is greater than or equal to 10 mm. This helps to ensure the distance between two adjacent vertices in the circumferential direction of the first microwave feed inlet 12a, and helps to improve the arcing problem between the two vertices.

[0129] It should be noted that there is no limit to the specific number of the second microwave feed inlets 13a.

[0130] In some embodiments, please refer to Figure 13 The number of second microwave feed inlets 13a can be only one.

[0131] In other embodiments, please refer to Figures 5 to 12 The number of second microwave feed inlets 13a shall not be less than two.

[0132] Understandably, the side where the door of the cooking appliance 100 is located is the front side, and the side opposite to it is the rear side. Facing the front side of the cooking appliance 100, the side where your left hand is located is the left side, and the side where your right hand is located is the right side. The cavity side wall 13 on the front side is the front panel, the cavity side wall 13 on the rear side is the rear panel, the cavity side wall 13 on the left side is the left panel, and the cavity side wall 13 on the right side is the right panel.

[0133] The second microwave feed inlet 13a is located on the cavity sidewall 13. Generally, the second microwave feed inlet 13a is located on the left side plate and / or the right side plate. It is understood that, based on the cuboid structure of the cavity 10a, the areas of the left side plate and the right side plate are relatively small.

[0134] In this embodiment, the heating uniformity of the food in the circumferential direction can be improved by setting at least two second microwave feed inlets 13a. That is, the minimum number of second microwave feed inlets 13a set on the cavity sidewall 13 does not need to be too large, and the minimum sum of the opening areas of all the second microwave feed inlets 13a in the second microwave introduction area will not be too large. In this way, even if a second microwave introduction area needs to be set on the left side plate and / or the right side plate, it is easy to implement, thereby improving the versatility of the solution; at the same time, after the second microwave introduction area is set on the left side plate or the right side plate, the ratio of the sum of the opening areas of the microwave feed inlets 10b on it to the total area of ​​the left side plate or the right side plate can also be controlled, which is beneficial to improving the structural stability and reliability of the left side plate or the right side plate.

[0135] Furthermore, microwaves fed from one of the second microwave feed ports 13a can cover at least part of the cooking cavity area that cannot be covered by microwaves fed from the other second microwave feed port 13a, thereby improving the coverage area of ​​the second microwave inlet area over the cooking cavity and further improving the uniformity of heating.

[0136] In some embodiments, please refer to Figures 5 to 8 At least two second microwave feed inlets 13a have their longitudinal axes intersecting. In other words, at least two second microwave feed inlets 13a are formed by multiple sides, wherein the line connecting the two endpoints of the longest side of one second microwave feed inlet 13a is the first long side line, and the line connecting the two endpoints of the longest side of the other second microwave feed inlet 13a is the second long side line, and the first long side line and the second long side line are set at an angle.

[0137] The definitions of the sides, the extension length of the sides, the definition of the longest side, and the definition of the shortest side of the second microwave feed inlet 13a are all understood with reference to the explanation in the microwave feed inlet 10b, and will not be repeated here.

[0138] For example, the first long side connection is Figures 5 to 8 The line shown in L1, the second longer side is the line connecting the two sides. Figures 5 to 8 The lines shown in L2 are straight lines. Both the first and second longest sides are straight lines.

[0139] The microwaves fed in through the second microwave feed inlet 13a, where the first long side is connected, cause the water molecules in the food to vibrate along the direction of the first long side. The microwaves fed in through the second microwave feed inlet 13a, where the second long side is connected, cause the water molecules in the food to vibrate along the direction of the second long side.

[0140] Because the first long side and the second long side are set at an angle, the water molecules in the food can vibrate in different directions, which helps to increase the collision and friction between molecules, thus making the heating more uniform and efficient.

[0141] In some embodiments, please refer to Figures 5 to 7 , Figures 10 to 12 At least two second microwave feed inlets 13a are spaced apart along the height direction of the cooking appliance 100.

[0142] Understandably, the microwaves fed into the first microwave induction zone enter from either the top or bottom side of the food. Specifically, when the first microwave induction zone is located on the bottom wall 12 of the cavity, the microwaves enter from the bottom side of the food. In this way, the heating effect on the bottom side of the food may be better than the heating effect on the top side.

[0143] In this embodiment, by providing two second microwave feed inlets 13a at intervals along the height direction of the cooking component, the area on the top side of the food can also be directly exposed to microwaves, which helps to further improve the uniformity of heating.

[0144] Furthermore, based on the turntable microwave oven, as the turntable rotates the food, every part of the food can directly pass through the second microwave induction zone, so that all parts can be directly exposed to microwaves. As a result, the food has good heating uniformity in both the vertical and horizontal planes.

[0145] In some embodiments, please refer to Figure 3 and Figure 4 The microwave generating component 30 includes an antenna cap 31, and a microwave inlet area on one side of the antenna cap 31 is a second microwave inlet area. The microwave feed inlet 10b of the second microwave inlet area is a second microwave feed inlet 13a. In the height direction of the cooking appliance 100, the distance between the center of the antenna cap 31 and the center of at least one second microwave feed inlet 13a is half the wavelength of the microwave.

[0146] Specifically, please refer to Figure 3 When there is more than one second microwave feed inlet 13a, it can be that the second microwave feed inlet 13a located at the top in the height direction of the cooking appliance 100 is the first feed inlet, and the distance between the center of the antenna cap 31 and the center of the first feed inlet is half the wavelength of the microwave.

[0147] For example, the spacing between the center of the antenna cap 31 and the center of the first feed port is as follows: Figure 3 and Figure 13 As shown in W1.

[0148] This allows the area with the strongest microwave field at the first feed port to have a larger output energy, which is beneficial for improving the cooking efficiency of food and the uniformity of heating.

[0149] For example, the size range of W1 is 60mm to 80mm. For example, it can be 60mm, 62mm, 64mm, 66mm, 68mm, 70mm, 72mm, 74mm, 76mm, 78mm, 80mm, etc.

[0150] In some embodiments, please refer to Figure 3 In the height direction of the cooking appliance 100, the center-to-center distance between the uppermost second microwave feed inlet 13a and the adjacent second microwave feed inlet 13a is one-quarter of the microwave wavelength.

[0151] It should be noted that the uppermost second microwave feed inlet 13a is referred to as the first feed inlet, and the second microwave feed inlet 13a adjacent to the first feed inlet is referred to as the second feed inlet.

[0152] This allows for a larger output energy at the point of maximum microwave field strength at the second feed port.

[0153] For example, the distance between the center of the first feed port and the center of the second feed port is as follows: Figure 3 As shown in W2.

[0154] For example, the size range of W2 is 30mm to 40mm. For example, it can be 31mm, 32mm, 33mm, 34mm, 35mm, 36mm, 37mm, 38mm, 39mm, 40mm, etc.

[0155] In some embodiments, the second microwave inlet region includes a circular second microwave feed inlet 13a, the diameter of which is smaller than the width of the cavity sidewall 13, wherein the width of the cavity sidewall 13 is the dimension of the cavity sidewall 13 in the direction perpendicular to the height of the cooking appliance 100.

[0156] It is understood that the extended surface of the cavity sidewall 13 is parallel to the height direction of the cooking appliance 100. The cavity sidewall 13 has a width dimension, a thickness dimension, and a height dimension, with the width dimension being greater than the thickness dimension.

[0157] In this embodiment, the diameter of the circular second microwave feed inlet 13a can be increased as much as possible, which is beneficial for microwaves of higher frequency and longer wavelength to pass through the circular second microwave feed inlet 13a, thus improving the heating efficiency of the food.

[0158] In some embodiments, please refer to Figures 2 to 4 The second microwave inlet region includes a second microwave feed inlet 13a formed by multiple sides.

[0159] Here, the longest side of the second microwave feed inlet 13a, which is formed by multiple sides, extends less than the width of the cavity sidewall 13 and is greater than or equal to 40 mm. The width of the cavity sidewall 13 is the dimension of the cavity sidewall 13 in the direction perpendicular to the height of the cooking appliance 100.

[0160] This facilitates the opening of the second microwave feed inlet 13a formed by multiple sides on the cavity sidewall 13, avoiding the problem of the second microwave feed inlet 13a formed by multiple sides penetrating one or both sides of the cavity sidewall 13 in the width direction, thereby helping microwaves to be fed into the cooking cavity stably and reliably.

[0161] Here, the shortest side of the second microwave feed inlet 13a, formed by multiple sides, extends at least 10 mm. This helps to ensure the distance between two adjacent vertices of the second microwave feed inlet 13a formed by multiple sides, and helps to improve the arcing problem between the two vertices.

[0162] In some embodiments, please refer to Figures 2 to 4 The sum of the areas of each of the first microwave feed entrances 12a is greater than the sum of the areas of each of the second microwave feed entrances 13a.

[0163] It should be noted that, depending on the food being consumed, most foods are relatively flat, such as food served on a plate, and their dimensions in the vertical direction are smaller than their dimensions in the horizontal plane. Therefore, in this embodiment, the sum of the areas of each of the first microwave feed inlets 12a (referred to as S1) is greater than the sum of the areas of each of the second microwave feed inlets 13a.

[0164] It is understood that the amount of microwaves entering the cooking cavity through the first microwave feed inlet 12a is greater than the amount of microwaves entering the cooking cavity through the second microwave feed inlet 13a. This results in a significantly greater amount of microwaves entering the cooking cavity through the top wall 11 and / or bottom wall 12 than those entering through the side wall 13. The microwaves entering the cooking cavity through the first microwave feed inlet 12a can quickly penetrate the food in the height direction to heat it, while the microwaves entering the cooking cavity through the second microwave feed inlet 13a can heat food with a certain height, such as a glass of milk. This improves the uniformity of food heating in the height direction. In other words, the cooking appliance of this embodiment can improve the rationality of microwave distribution in the cooking cavity, which can both heat food quickly and improve the uniformity of food heating in the height direction, thus improving the cooking effect of the cooking appliance.

[0165] In some embodiments, please refer to Figures 2 to 4 The sum of the areas of each first microwave feed inlet 12a is 3 to 5 times the sum of the areas of each second microwave feed inlet 13a, i.e., 3 ≤ S1 / S2 ≤ 5. For example, it can be 3 times, 3.5 times, 3.7 times, 4 times, 4.5 times, or 5 times, etc. In this way, by limiting the limit of the ratio of S1 to S2, the ratio of the amount of microwaves entering the cooking cavity from the top wall 11 and / or the bottom wall 12 to the amount of microwaves entering the cooking cavity through the side wall 13 can be controlled. This makes the ratio of the amount of microwaves penetrating the food from the horizontal and vertical directions reasonable, so that the cooking cavity can quickly heat most relatively flat foods and foods with a certain height. It can also reduce the uneven heating caused by different types of food, and further improve the cooking effect of the cooking appliance 100.

[0166] For example, the area S1 of the first microwave feed inlet 12a is 3293.7 mm². 2 (square millimeters) ~5489.5mm 2 That is, 3293.7mm 2 ≤S1≤5489.5mm 2 For example, S1 is 3293.7 mm. 2 3300mm 2 3500mm 2 3800mm 2 4000mm 2 4066.4mm 2 4500mm 2 5000mm 2 Or 5489.5mm 2 The area S2 of the second microwave feed inlet 13a is 813.28 mm². 2 ~1355.46mm 2 That is, 813.28mm2 ≤S2≤1355.46mm 2 For example, S2 is 813.28 mm. 2 820mm 2 850mm 2 870mm 2 900mm 2 950mm 2 1000mm 2 1097.9mm 2 1100mm 2 1200mm 2 1300mm 2 Or 1355.46mm 2 wait.

[0167] It should be noted that when determining the values ​​of the sum of the areas S1 of each first microwave feed inlet 12a and the sum of the areas S2 of each second microwave feed inlet 13a, it is necessary to satisfy 3≤S1 / S2≤5.

[0168] In some specific embodiments, the sum of the areas S1 of each of the first microwave feed entrances 12a is 4066.4 mm. 2 The sum of the areas S2 of each of the second microwave feed entrances 13a is 1097.9 mm. 2 That is, S1 / S2 = 3.70 (rounded to two decimal places).

[0169] In some embodiments, please refer to Figure 14 and Figure 15 The cooking appliance 100 also includes a partition 40, and the cavity wall 10 includes a cavity bottom wall 12. The microwave inlet area on the cavity bottom wall 12 is a first microwave inlet area, and the microwave feed inlet 10b of the first microwave inlet area is a first microwave feed inlet 12a. In the height direction of the cooking appliance 100, the cavity bottom wall 12 forms the boundary of the bottom side of the cavity 10a. The partition 40 is provided on the side of the cavity bottom wall 12 facing the cavity 10a and forms an empty space 100a between it and the cavity bottom wall 12.

[0170] The partition 40 has a certain structural strength and can support the food and food containers.

[0171] A partition 40 is disposed within the cavity 10a and covers each microwave inlet area. Thus, the side of the partition 40 facing away from the microwave inlet area and the cavity wall 10 of the cavity 10a define a cooking cavity. Specifically, a portion of the space in the cavity 10a is used to form the cooking cavity, which is separated from the microwave feed inlet 10b by the partition 40. Food residue and broth generated during heating within the cooking cavity are blocked by the partition 40, preventing them from entering the waveguide channel through the microwave feed inlet 10b. It is understood that food residue and broth within the cooking cavity are easier to clean, which is beneficial to user health; furthermore, it prevents fire hazards caused by prolonged heating of uncleaned food residue. It should be noted that the specific type of partition 40 is not limited; for example, it can be a glass plate, mica sheet, etc.

[0172] The vacant space 100a refers to an unoccupied space, allowing microwaves from the first microwave feed inlet 12a to pass directly through the vacant space 100a and the partition 40. This means that the microwaves entering the vacant space 100a can pass directly through the partition 40, indicating the absence of any components within the vacant space 100a that could obstruct microwave conduction. This reduces microwave loss during its entry into the cooking cavity from the first microwave feed inlet 12a. Furthermore, the vacant space 100a provides diffusion space for microwaves fed from the first microwave feed inlet 12a, facilitating microwave dispersion and reducing the risk of localized overheating due to microwave concentration.

[0173] It should be noted that in the prior art, due to the need to solve the problem of microwave uniformity, a motor 43' and a stirring antenna 41' are installed below the bottom wall of the cavity. The stirring antenna 41' is located between the bottom wall of the cavity and the partition. Therefore, a large distance needs to be maintained between the bottom wall of the cavity and the partition to install the stirring antenna 41'. At the same time, a large space also needs to be made below the bottom wall of the cavity to install the motor 43'. As a result, a large space needs to be reserved below the partition to install the motor and the stirring antenna. With the external dimensions of the cooking appliance 100' remaining unchanged, the above design requires sacrificing the volume of the cooking cavity.

[0174] The cooking appliance 100 of this embodiment, through the first microwave feed inlet 12a and the second microwave feed inlet 13a distributed on different side cavity walls 10, facilitates the feeding of microwaves from both the vertical and horizontal directions to heat the food and improve heating uniformity. In other words, this method solves the problem of microwave uniformity. As a result, there is no need to set up the stirring antenna and motor as in the prior art, so that an empty space 100a can be formed between the cavity bottom wall 12 and the partition 40. Moreover, there is no need to make room for the motor below the cavity bottom wall 12. Thus, the space below the partition 40 can be made smaller. Therefore, without changing the external dimensions of the cooking appliance 100, it is beneficial to increase the volume of the cooking cavity while ensuring microwave uniformity.

[0175] In some embodiments, please refer to Figure 14 and Figure 15 The cavity bottom wall 12 includes a first recessed portion 121 and an annular first platform portion 122. The first platform portion 122 surrounds the outer periphery of the first recessed portion 121. The first recessed portion 121 is recessed downward from the inner edge of the first platform portion 122. The bottom wall of the first recessed portion 121 is provided with one or more first microwave feed inlets 12a. The partition 40 is disposed in the first recessed portion 121.

[0176] The first recess 121 is recessed downwards. It can be understood that the downward recess of the first recess 121 is beneficial to increasing the internal space of the cooking cavity (i.e., increasing the volume of the cooking cavity).

[0177] The design of the first recess 121 allows for a smaller distance between the cavity bottom wall 12 and the partition 40.

[0178] The top surface of the partition 40 is lower than the top surface of the first platform portion 122. Thus, without changing the size of the cooking appliance 100, the cooking cavity of this embodiment has a larger volume than in related technologies where the top surface of the partition 40 is flush with the bottom wall of the cooking cavity, and can hold more food.

[0179] It should be noted that the specific area of ​​the first recess 121 is not limited.

[0180] In some embodiments, the projected area of ​​the first recess 121 (hereinafter referred to as S1) on the horizontal plane is not less than 1 / 2 of the projected area of ​​the cavity bottom wall 12 (hereinafter referred to as S), that is, S1 ≥ 1 / 2 S. In this way, the area S1 of the first recess 121 is reasonable. On the one hand, it makes the bottom wall of the first recess 121 have a reasonable area, which is conducive to setting one or more first microwave feed inlets 12a on the bottom wall of the first recess 121; on the other hand, it is conducive to increasing the volume of the cooking cavity.

[0181] In some embodiments, please refer to Figure 14 and Figure 15 The distance between the partition 40 and the bottom wall of the first recess 121 (hereinafter referred to as W3, please refer to...) Figure 15 The value is greater than 5mm, i.e., 5mm≤W3, for example, W3 is 5mm, 6mm or 7mm, etc.

[0182] This ensures that the distance between the partition 40 and the bottom wall of the first recess 121 is reasonable, allowing microwaves to be dispersed within the space between the partition 40 and the bottom wall of the first recess 121. This reduces the possibility of microwaves radiated from the first microwave feed inlet 12a focusing on the partition 40, thus ensuring the safety of the cooking appliance 100 during operation.

[0183] In some embodiments, please refer to Figures 16 to 22 The cavity wall 10 includes a cavity bottom wall 12, a microwave inlet area on the cavity bottom wall 12 is a first microwave inlet area, a microwave feed inlet 10b of the first microwave inlet area is a first microwave feed inlet 12a, and a portion of the cavity bottom wall 12 protrudes into the waveguide channel to form one or more first protrusions 123, and the first microwave feed inlet 12a is formed in the first protrusions 123.

[0184] In this embodiment, the cooking appliance 100, by forming the first microwave feed inlet 12a on the first protrusion 123, makes the first microwave feed inlet 12a protrude from the plane of the cavity bottom wall 12. This increases the distance between the first microwave feed inlet 12a and the glass plate, reducing the possibility of microwaves radiated from the first microwave feed inlet 12a focusing on the glass plate and improving the operational safety of the cooking appliance 100. Furthermore, the first protrusion 123 acts as a reinforcing rib, increasing the structural strength of the cavity bottom wall 12 while preventing deformation of the shape of the first microwave feed inlet 12a. Additionally, the microwave feed inlets 10b distributed on different side cavity walls 10 facilitate the feeding of microwaves from both vertical and horizontal directions, heating food and improving heating uniformity.

[0185] It should be noted that the specific degree of protrusion of the first microwave feed inlet 12a relative to the cavity bottom wall 12 toward the plane is not limited.

[0186] In some embodiments, please refer to Figure 17 , Figure 19 , Figure 21 and Figure 22 The distance between the first microwave feed inlet 12a and the plane containing the cavity bottom wall 12 (e.g.) Figure 17The distance W4 (as shown in the diagram) is 1mm to 30mm, meaning 30mm ≥ W4 ≥ 1mm. For example, W4 can be 1mm, 2mm, 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, 15mm, 20mm, 25mm, or 30mm, etc. This ensures that the distance W4 between the first microwave feed inlet 12a and the plane containing the cavity bottom wall 12 is reasonable, and that the distance between the first microwave feed inlet 12a and the glass plate is reasonable, so that the microwaves radiated from the first microwave feed inlet 12a are less likely to accumulate on the glass plate. Furthermore, ensuring that the first microwave feed inlet 12a does not protrude excessively relative to the plane of the cavity bottom wall 12 serves two purposes. First, it reduces the disturbance of the magnetic field within the waveguide channel by the edge of the first microwave feed inlet 12a, lowering the possibility of the magnetic field within the waveguide channel being disturbed into higher-order modes, thus ensuring that the first microwave feed inlet 12a can stably cut the surface current of the waveguide channel and radiate microwaves. Second, it also reduces the microwave reflection effect of the protruding part of the first microwave feed inlet 12a, reduces the standing wave phenomenon within the waveguide channel, and improves the microwave transmission efficiency within the waveguide channel.

[0187] In some embodiments, please refer to Figure 17 , Figure 19 , Figure 21 and Figure 22 The distance W4 between the first microwave feed inlet 12a and the plane of the corresponding cavity bottom wall 12 is 2mm to 8mm, that is, 2mm≤W4≤8mm. For example, W4 can be 2mm, 3mm, 4mm, 5mm, 6mm, 7mm or 8mm, etc.

[0188] In some embodiments, please refer to Figure 19 , Figure 21 and Figure 22 The minimum distance between the edge of the projection of the first microwave feed inlet 12a and the edge of the projection of the first protrusion 123 on the orthographic projection of the plane containing the cavity bottom wall 12 (e.g., ... Figure 19 The value of W5 (as shown in the figure) is 1mm to 30mm, that is, 1mm ≤ W5 ≤ 30mm. For example, W5 can be 1mm, 2mm, 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, 11mm, 12mm, 15mm, 20mm, 25mm, or 30mm, etc. In this way, the distance between the edge of the first protrusion 123 and the first microwave feed inlet 12a is reasonable, so as to ensure the structural strength of the first microwave feed inlet 12a and make the shape of the first microwave feed inlet 12a less prone to deformation.

[0189] In some embodiments, please refer to Figure 19 , Figure 21 and Figure 22The minimum distance between the edge of the projection of the first microwave feed inlet 12a and the edge of the projection of the first protrusion 123 on the plane where the cavity bottom wall 12 is located is 1mm~10mm, that is, 2mm≤W5≤10mm. For example, W5 can be 2mm, 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm or 10mm, etc.

[0190] It should be noted that the specific shape of the first protrusion 123 is not limited.

[0191] In some embodiments, please refer to Figure 22 From the bottom wall 12 of the cavity towards the waveguide channel, the first protrusion 123 is constricted. That is, from the inside of the waveguide channel towards the cooking cavity, the first protrusion 123 is diffused, so that the microwaves radiated from the first microwave feed port 12a can enter the cooking cavity after being diffused by the first protrusion 123, thereby expanding the microwave coverage area, reducing the microwave distribution blind zone, and improving the cooking effect of the cooking cavity.

[0192] For example, please refer to Figure 16 and Figure 17 On the cross-section at point B, the outer contour of the first protrusion 123 is rectangular, and the first microwave feed inlet 12a is located on the long side of the rectangle.

[0193] For example, please refer to Figure 18 and Figure 19 On the cross-section at point C, the outer contour of the first protrusion 123 is triangular, and the first microwave feed inlet 12a is located on one side of the triangle.

[0194] For example, please refer to Figure 20 and Figure 22 On the cross-sectional surface at point D, the outer contour of the first protrusion 123 is a trapezoid with a wider top and a narrower bottom, and the first microwave feed inlet 12a is located on the shorter side of the trapezoid. This allows the microwaves radiated from the first microwave feed inlet 12a to be better diffused by the first protrusion 123 before entering the cooking cavity.

[0195] In some embodiments, please refer to Figure 14 and Figure 15 The cooking appliance also includes a partition 40, which is located at the bottom of the cooking cavity and above the cavity bottom wall 12. The partition 40 is used to place food. It is understood that the partition 40 has a certain structural strength to support the food and food containers. The partition 40 may be, for example, a glass plate.

[0196] For example, please refer to Figure 14 and Figure 15 The distance between the plane containing the partition 40 and the bottom wall 12 of the cavity (e.g.) Figure 14The distance W3 (as shown in the diagram) is 5mm to 23mm, meaning 5mm ≤ W3 ≤ 23mm. For example, W3 can be 5mm, 10mm, 15mm, 20mm, or 23mm. This ensures that the distance W3 between the partition 20 and the cavity bottom wall 12 is reasonable, allowing microwaves to be dispersed within the space between the partition 40 and the cavity bottom wall 12, improving the uniformity of microwave distribution and enhancing the cooking effect of the cooking cavity.

[0197] In some embodiments, please refer to Figure 14 and Figure 15 The distance W3 between the partition 40 and the cavity bottom wall 12 is the first distance, and the distance W4 between the first microwave feed inlet 12a and the plane where the cavity bottom wall 12 is located is the second distance. The ratio of the first distance to the second distance is 1.2 to 1.8, that is, 1.2≤W3 / W4≤1.8.

[0198] Thus, the ratio of the first distance to the second distance is reasonable, which ensures that the space between the partition 40 and the cavity bottom wall 12 is reasonable, so that the microwaves radiated from the microwave feed inlet 10b of the cavity bottom wall 12 have enough space to disperse, and also ensures that the distance between the first microwave feed inlet 12a and the glass plate is reasonable, so that the microwaves radiated from the first microwave feed inlet 12a are not prone to forming a concentration phenomenon on the glass plate.

[0199] The above embodiments are merely illustrative of the technical solutions of this application and are not intended to limit it. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A cooking utensil, characterized in that, include: A cavity wall is formed by surrounding a cavity. Multiple microwave induction areas are provided on the cavity wall. Each microwave induction area includes a microwave feed inlet that penetrates the cavity wall. Each microwave induction area is located on a different side of the cavity. A waveguide is disposed on the outer side of the cavity wall and defines a waveguide channel with the outer side wall of the cavity wall, the waveguide channel connecting each of the microwave introduction areas; A microwave generating assembly for generating microwaves is disposed on the waveguide and located on one side of the cavity wall in the horizontal direction. The microwaves generated by the microwave generating assembly can enter the waveguide channel.

2. The cooking utensil according to claim 1, characterized in that, The plurality of microwave induction zones include a first microwave induction zone and a second microwave induction zone, wherein the perpendicular line on the side where the first microwave induction zone is located intersects the perpendicular line on the side where the second microwave induction zone is located.

3. The cooking utensil according to claim 2, characterized in that, The cavity wall includes a top cavity wall and a bottom cavity wall spaced apart along the height direction of the cooking appliance, and the plates on the other sides of the cavity wall, excluding the top cavity wall and the bottom cavity wall, are cavity sidewalls; The microwave feed inlet of the first microwave inlet region is a first microwave feed inlet, which is located on the top wall or the bottom wall of the cavity. The microwave feed inlet of the second microwave inlet region is a second microwave feed inlet, which is located on the side wall of the cavity.

4. The cooking utensil according to claim 3, characterized in that, The sum of the areas of each of the first microwave feed ports is greater than the sum of the areas of each of the second microwave feed ports.

5. The cooking utensil according to claim 4, characterized in that, The sum of the areas of each of the first microwave feed ports is 3 to 5 times the sum of the areas of each of the second microwave feed ports.

6. The cooking utensil according to claim 3, characterized in that, The number of the first microwave feed inlets is no less than two.

7. The cooking utensil according to claim 6, characterized in that, The straight line connecting two points on the edge of the first microwave feed inlet is the first connecting line. The first connecting line, which is entirely within the range of the first microwave feed inlet and has the longest length, is the maximum diameter of the first microwave feed inlet. At least two of the first microwave feed inlets have different maximum diameters.

8. The cooking utensil according to claim 7, characterized in that, The maximum aperture size of any two of the first microwave feed inlets is different.

9. The cooking utensil according to claim 3, characterized in that, The first microwave feed inlet is formed by multiple sides, with the connection point of two adjacent sides forming a vertex.

10. The cooking utensil according to any one of claims 3-9, characterized in that, The cavity top wall or the cavity bottom wall includes four quadrant regions, and each quadrant region is provided with at least one of the first microwave feed inlets; The four quadrants are four quadrants defined by two coordinate axes in a two-dimensional rectangular coordinate system.

11. The cooking utensil according to claim 10, characterized in that, The first microwave feed inlets corresponding to the four quadrants are arranged axially symmetrically with respect to the coordinate axes and / or centrally symmetrically with respect to the origin of the four quadrants.

12. The cooking utensil according to claim 10, characterized in that, The first microwave inlet region also includes a circular first microwave feed inlet, the center of which overlaps with the origin of the four quadrant regions.

13. The cooking utensil according to any one of claims 3-9, characterized in that, The number of second microwave feed inlets shall not be less than two.

14. The cooking utensil according to claim 13, characterized in that, At least two of the second microwave feed inlets have their longitudinal axes intersecting.

15. The cooking utensil according to claim 13, characterized in that, In the height direction of the cooking appliance, the center-to-center distance between the uppermost second microwave feed inlet and an adjacent second microwave feed inlet is one-quarter of the microwave wavelength; and / or, At least two second microwave feed inlets are spaced apart along the height direction of the cooking appliance.

16. The cooking utensil according to any one of claims 1-9, characterized in that, The microwave generating assembly includes an antenna cap, and the microwave inlet area on one side of the antenna cap is a second microwave inlet area. The microwave feed inlet of the second microwave inlet area is a second microwave feed inlet. In the height direction of the cooking appliance, the distance between the center of the antenna cap and the center of at least one second microwave feed inlet is half the wavelength of the microwave.

17. The cooking utensil according to any one of claims 1-9, characterized in that, The cooking appliance also includes a partition, the cavity wall includes a cavity bottom wall, the microwave induction area on the cavity bottom wall is a first microwave induction area, the microwave feed inlet of the first microwave induction area is a first microwave feed inlet, in the height direction of the cooking appliance, the cavity bottom wall forms the boundary of the bottom side of the cavity, the partition is disposed on the side of the cavity bottom wall facing the cavity and forms an empty space between it and the cavity bottom wall.

18. The cooking utensil according to claim 17, characterized in that, The cavity bottom wall includes a first recess and an annular first platform. The first platform surrounds the outer periphery of the first recess. The first recess is recessed downward from the inner edge of the first platform. The bottom wall of the first recess is provided with one or more first microwave feed inlets. The partition is disposed in the first recess.

19. The cooking utensil according to claim 18, characterized in that, The distance between the partition and the bottom wall of the first recess is not less than 5 mm.

20. The cooking utensil according to any one of claims 1-9, characterized in that, The cavity wall includes a cavity bottom wall, the microwave induction area on the cavity bottom wall is a first microwave induction area, the microwave feed inlet of the first microwave induction area is a first microwave feed inlet, and a portion of the cavity bottom wall protrudes into the waveguide channel to form one or more first protrusions, and the first microwave feed inlet is formed in the first protrusion.

21. The cooking utensil according to claim 20, characterized in that, The distance between the first microwave feed inlet and the plane containing the cavity bottom wall is 1mm to 30mm.

22. The cooking utensil according to claim 20, characterized in that, The distance between the first microwave feed inlet and the plane containing the cavity bottom wall is 2mm to 8mm.

23. The cooking utensil according to claim 20, characterized in that, The cooking appliance also includes a partition, which is disposed above the bottom wall of the cavity and is used to place food. The distance between the partition and the cavity bottom wall is the first distance, and the distance between the first microwave feed inlet and the plane where the cavity bottom wall is located is the second distance. The ratio of the first distance to the second distance is 1.2 to 1.

8.

24. The cooking utensil according to claim 20, characterized in that, The minimum distance between the edge of the projection of the first microwave feed inlet and the edge of the projection of the first protrusion in the orthographic projection of the plane where the cavity bottom wall is located is 1mm to 30mm.

25. The cooking utensil according to claim 20, characterized in that, The minimum distance between the edge of the projection of the first microwave feed inlet and the edge of the projection of the first protrusion in the orthographic projection of the plane where the bottom wall of the cavity is located is 2mm to 10mm.

26. The cooking utensil according to claim 20, characterized in that, The first protrusion is constricted in the direction from the plane of the cavity bottom wall toward the waveguide channel.

27. The cooking utensil according to any one of claims 1-9, characterized in that, The distance between the two endpoints of the longest side of at least one of the microwave feed inlets is not less than 65 mm, for passing microwaves with a frequency of 2.4 GHz or higher. And / or, The spacing between the two endpoints of the longest side of at least one of the microwave feed inlets is between 55 mm and 65 mm, for transmitting microwaves with frequencies above 2.433 GHz; and / or, The distance between the two endpoints of the longest side of at least one of the microwave feed inlets is no greater than 55 mm, for transmitting microwaves with a frequency of 2.466 GHz or higher.

28. The cooking utensil according to any one of claims 1-9, characterized in that, At least a portion of the microwave feed inlet is formed by multiple sides; wherein the distance between the two endpoints of the longest side of the microwave feed inlet is 40mm-65mm; and / or, the distance between the two endpoints of the shortest side of the microwave feed inlet is not less than 10mm.

Images