A cooking appliance

Abstract

The cooking utensil provided by the embodiment of the present application has a cooking cavity, and comprises a cavity wall, a microwave generating assembly and a waveguide channel. The cooking cavity is located in a space formed by the cavity wall. The cavity wall comprises a cavity side wall, a cavity top wall and a cavity bottom wall. The cavity bottom wall is provided with a first microwave feed inlet. The microwave generating assembly is used to generate microwaves. The waveguide channel is used to conduct the microwaves generated by the microwave generating assembly to the cooking cavity through the first microwave feed inlet. The waveguide channel comprises a first channel located below the cavity bottom wall. In a cross section perpendicular to the height direction of the cooking utensil, the cross section of the first channel is circular or a local part of a circle. The waveguide channel can be made as close to the edge of the cavity bottom wall as possible, so as to reduce the possibility of microwave dead angle at the edge of the cavity bottom wall, improve the bottom coverage range, and thus improve the heating uniformity of the edge of the cooking cavity, and further improve the cooking effect 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. 202510506359.4, 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 household appliance technology, and more particularly to a cooking appliance. Background Technology

[0004] Taking microwave ovens as an example, related technologies utilize waveguide assemblies to guide microwaves generated by magnetron assemblies into the cooking cavity. These microwaves then drive the vibration of molecules within the food to heat it, thus achieving cooking. However, uneven microwave distribution within the cooking cavity affects the cooking efficiency of the appliance. Summary of the Invention

[0005] In view of this, the present application aims to provide a cooking appliance that improves the microwave distribution within the cooking cavity, thereby enhancing the cooking efficiency of the appliance.

[0006] To achieve the above objectives, the technical solution of this application embodiment is implemented as follows:

[0007] This application provides a cooking appliance, the cooking appliance having a cooking cavity, the cooking appliance comprising:

[0008] The cavity wall, wherein the cooking cavity is located within the space enclosed by the cavity wall, the cavity wall includes a cavity side wall, a cavity top wall and a cavity bottom wall, and the cavity bottom wall is provided with a first microwave feed inlet;

[0009] Microwave generating assembly, used to generate microwaves;

[0010] A waveguide channel is used to conduct microwaves generated by the microwave generating component to the cooking cavity through the first microwave feed inlet.

[0011] The waveguide channel includes a first channel located below the bottom wall of the cavity. In a cross-section perpendicular to the height direction of the cooking appliance, the cross-section of the first channel is circular or a portion of a circle.

[0012] In some embodiments, at least one cavity sidewall is provided with a second microwave feed inlet, through which microwaves generated by the microwave generating assembly are conducted to the cooking cavity.

[0013] In some embodiments, the cavity wall includes a first cavity sidewall, and the microwave generating assembly and the second microwave feed inlet are located on the first cavity sidewall.

[0014] In some embodiments, the cooking appliance includes a first shell and a second shell connected to each other, the first shell being located on the side of the first cavity sidewall away from the cooking cavity, the second shell being located on the side of the cavity bottom wall away from the cooking cavity, the first shell and the first cavity sidewall enclosing a portion of the waveguide channel, and the second shell and the cavity bottom wall enclosing another portion of the waveguide channel.

[0015] In some embodiments, the microwave generating assembly includes a magnetron mounting bracket and a magnetron tube. The magnetron mounting bracket is disposed on the side of the first housing portion away from the cooking cavity. The first housing portion has a magnetron port. The magnetron tube is mounted on the magnetron mounting bracket, with one end of the magnetron tube passing through the magnetron port and extending into the first housing portion.

[0016] In some implementations, the first shell portion and the second shell portion are an integral structure.

[0017] In some embodiments, the second shell includes a platform segment and a connecting segment, one end of the connecting segment being connected to the first shell, the platform segment being located at the end of the connecting segment away from the first shell, and the projection of the first microwave feed inlet being located within the projection of the platform segment on a projection plane perpendicular to the height direction of the cooking appliance, the platform segment and the cavity bottom wall enclosing the first channel.

[0018] In some implementations, the platform segment and the connecting segment are arranged along a first direction, and the dimension of the platform segment perpendicular to the first direction is larger than the dimension of the connecting segment perpendicular to the first direction.

[0019] In some implementations, there are multiple first microwave feed ports, which are spaced apart circumferentially along the bottom wall of the cavity and extend radially along the bottom wall of the cavity.

[0020] In some implementations, the cavity floor wall includes four quadrants, each quadrant having at least one of the first microwave feed inlets.

[0021] In some implementations, the wavelength of the microwave fed into the waveguide channel by the microwave generating component is a first wavelength, the length of the first microwave feed inlet is not less than one-quarter of the first wavelength, and the width of the first microwave feed inlet is not less than 10 mm.

[0022] In some implementations, the wavelength of the microwave fed into the waveguide channel by the microwave generating component is a first wavelength, and the distance between the geometric center of the second microwave feed inlet and the waveguide output port of the microwave generating component is a positive integer multiple of half of the first wavelength.

[0023] The cooking appliance provided in this application embodiment has a first microwave feed inlet on the bottom wall of the cavity, and the waveguide channel is configured to include a first channel located below the bottom wall of the cavity. In a cross-section perpendicular to the height direction of the cooking appliance, the cross-section of the first channel is circular or a portion of a circle. This allows the waveguide channel to be as close as possible to the edge of the bottom wall of the cavity, reducing the possibility of microwave dead zones at the edge of the cavity, increasing the bottom coverage area, thereby improving the heating uniformity of the edge of the cooking cavity and ultimately enhancing the cooking effect of the appliance. Furthermore, it can be adapted to round tableware, which helps reduce energy loss and improve energy utilization. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of the cooking utensil provided in the first embodiment of this application;

[0025] Figure 2 for Figure 1 A cross-sectional view of a Chinese cooking utensil;

[0026] Figure 3 for Figure 1 A partial structural schematic diagram of the mid-waveguide shell assembly;

[0027] Figure 4 for Figure 1 A partial structural schematic diagram of the mid-waveguide shell assembly from another perspective;

[0028] Figure 5 for Figure 4 Cross-sectional view of the middle waveguide shell assembly;

[0029] Figure 6 A cross-sectional view of the cooking utensil provided in the second embodiment of this application;

[0030] Figure 7 for Figure 6 Enlarged view of point A in the middle.

[0031] Explanation of reference numerals in the attached figures

[0032] 1. Cooking appliance; 1a. Cooking cavity; 1a1. Cavity sidewall; 1a2. Cavity bottom wall; 1a21. First recess; 1a3. Loading / unloading port; 12a. Waveguide channel; 121. First housing; 121a. First microwave feed inlet; 121b. Platform section; 121c. Connecting section; 122. Second housing; 122a. Second microwave feed inlet; 1222a. Magnetron port; 13. Microwave generating assembly; 131. Magnetron; 132. Magnetron mounting bracket; 14. Transformer assembly; 15. Partition. Detailed Implementation

[0033] 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.

[0034] 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.

[0035] 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.

[0036] 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.

[0037] 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.

[0038] 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.

[0039] The present application will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0040] This application provides a cooking utensil 1, please refer to... Figures 1 to 3 The cooking appliance 1 has a cooking cavity 1a, which includes a cavity wall, a microwave generating assembly 13, and a waveguide channel 12a. The cooking cavity 1a is located within the space enclosed by the cavity wall. The cavity wall includes a cavity side wall 1a1, a cavity top wall, and a cavity bottom wall 1a2. The cavity bottom wall 1a2 is provided with a first microwave feed inlet 121a. The microwave generating assembly 13 is used to generate microwaves. The waveguide channel 12a is used to conduct the microwaves generated by the microwave generating assembly 13 to the cooking cavity 1a through the first microwave feed inlet 121a. The waveguide channel 12a includes a first channel located below the cavity bottom wall 1a2. In a cross-section perpendicular to the height direction of the cooking appliance 1, the cross-section of the first channel is circular or a portion of a circle.

[0041] It should be noted that the specific type of cooking utensil 1 is not limited here.

[0042] For example, the cooking appliance 1 can be a microwave oven; different functions can also be integrated into the cooking appliance 1 according to user needs, such as a microwave-steam-oven combo, to improve ease of use. This application embodiment uses a microwave oven as an example for description.

[0043] Please refer to Figure 1 The cooking cavity 1a is located within the space enclosed by the cavity walls. It is understood that the cooking cavity 1a can be used to hold food to be cooked.

[0044] It should be noted that "top side" and "bottom side" refer to the two sides in the height direction, such as... Figure 1 The directions pointed to by the two ends of the height-direction arrow.

[0045] It should be noted that the cavity sidewall 1a1 refers to the remaining parts of the cavity wall excluding the cavity top wall and cavity bottom wall 1a2. For example, it could be the cavity wall on the left side, the cavity wall on the right side, or the cavity wall on the rear side of the cooking cavity 1a, etc.

[0046] It should be noted that the cavity wall of the cooking cavity 1a can be formed of a single metal material or a mixture of multiple metal materials, and this application does not impose any restrictions on this.

[0047] For example, please refer to Figure 1 The cooking cavity 1a has a loading / unloading opening 1a3 on one side along the front-to-back direction. Understandably, food to be cooked can enter and exit the cooking cavity 1a through the loading / unloading opening 1a3.

[0048] For ease of understanding, in this embodiment, the side where the opening 1a3 is located is designated as the front side, and the side opposite to the opening 1a3 is designated as the rear side. The direction perpendicular to the front-back direction in the horizontal plane is designated as the left-right direction. The height direction of the cooking utensil 1 is designated as the up-down direction. The front-back direction, left-right direction, and height direction constitute a three-dimensional Cartesian coordinate system.

[0049] The microwave generating component 13 is used to generate microwaves. Understandably, microwaves are used to heat food.

[0050] It should be noted that the specific structure of the microwave generating component 13 is not limited.

[0051] The microwave generator assembly 13 can also be called a magnetron assembly.

[0052] It should be noted that there is no limit to the specific frequency of microwaves. For example, the frequency of microwaves is 2.458 GHz (gigahertz, a unit of frequency).

[0053] Waveguide channel 12a is used to conduct microwaves generated by microwave generating component 13 to cooking cavity 1a through first microwave feed inlet 121a.

[0054] Understandably, when food is placed inside the cooking cavity 1a for cooking, the microwaves radiated from the first microwave feed inlet 121a into the cooking cavity 1a can heat the food from the bottom.

[0055] It should be noted that the number of first microwave feed inlets 121a can be one or more.

[0056] It should be noted that in the embodiments of this application, "multiple" refers to two or more.

[0057] In a cross-section perpendicular to the height of the cooking appliance 1, the first channel has a circular or partially circular cross-section, which improves bottom coverage. The cooking appliance 1 provided in this embodiment has a first microwave feed inlet 121a on the cavity bottom wall 1a2, and the waveguide channel 12a is configured to include a first channel located below the cavity bottom wall 1a2. In a cross-section perpendicular to the height of the cooking appliance 1, the first channel has a circular or partially circular cross-section. This allows the waveguide channel 12a to be as close as possible to the edge of the cavity bottom wall 1a2, reducing the possibility of microwave dead zones at the edge of the cavity bottom wall 1a2, improving bottom coverage, and thus improving the heating uniformity of the edge of the cooking cavity 1a, thereby improving the cooking effect of the cooking appliance 1. Furthermore, it can be adapted to round tableware, which helps reduce energy loss and improve energy utilization.

[0058] Please refer to Figures 1 to 2At least one cavity sidewall 1a1 is provided with a second microwave feed inlet 122a, and the microwaves generated by the microwave generating component 13 are conducted to the cooking cavity 1a through the second microwave feed inlet 122a.

[0059] The number of second microwave feed inlets 122a can be one or more, and this application does not impose any limitation on this. In some embodiments, only one cavity sidewall 1a1 may be provided with one or more second microwave feed inlets 122a. In other embodiments, one or more second microwave feed inlets 122a may be provided on each of the two cavity sidewalls 1a1. In still other embodiments, one or more second microwave feed inlets 122a may be provided on each of the three cavity sidewalls 1a1.

[0060] Understandably, when food is placed in the cooking cavity 1a for cooking, the microwaves radiated from the first microwave feed inlet 121a can heat the food from the bottom, while the microwaves radiated from the second microwave feed inlet 122a can heat food of a certain height, such as a glass containing milk. This allows for both rapid heating of the food and improved heating uniformity along its height, thus enhancing the cooking effect of the cooking appliance 1.

[0061] The cavity bottom wall 1a2 is provided with a first microwave feed inlet 121a, and the cavity side wall 1a1 is provided with a second microwave feed inlet 122a. This facilitates the feeding of microwaves from both the height and horizontal directions, and allows the microwave transmission directions of the first microwave feed inlet 121a and the second microwave feed inlet 122a to be orthogonal at 90°. This enables simultaneous heating in both the height and horizontal directions, improving heating uniformity and enhancing the cooking effect of the cooking appliance 1.

[0062] In some embodiments, please refer to Figures 6 to 7 The cavity bottom wall 1a2 includes a first recessed portion 1a21, which is recessed downwards. The first recessed portion 1a21 includes a bottom wall, and the bottom wall is provided with one or more first microwave feed inlets 121a. The cooking appliance 1 includes a partition 15, which is disposed in the first recessed portion 1a21. The partition 15 is used to place food, and an empty space is formed between the bottom wall and the partition 15.

[0063] It is understandable that the first recess 1a21 is recessed downwards, which helps to increase the internal space of the cooking cavity 1a (i.e., to increase the volume of the cooking cavity 1a).

[0064] Please refer to Figures 6 to 7 The partition 15 is disposed within the first recess 1a21. It is understood that the partition 15 has a certain structural strength and is capable of supporting the food and food container.

[0065] Please refer to Figure 6 and Figure 7 An empty space is formed between the bottom wall and the partition 15. This empty space refers to unoccupied space, allowing microwaves from the first microwave feed inlet 121a to pass directly through both the empty space and the partition 15. It is understood that the fact that microwaves entering the empty space can pass directly through the partition 15 means that there are no components within the empty space that could obstruct microwave conduction, reducing microwave loss during its entry into the cooking cavity 1a. Furthermore, the empty space also provides diffusion space for microwaves fed from the first microwave feed inlet 121a, facilitating microwave dispersion and reducing the phenomenon of localized overheating caused by microwave concentration.

[0066] It should be noted that in the prior art, due to the need to solve the problem of microwave uniformity, a motor and a microwave stirring antenna are installed below the bottom wall 1a2 of the cavity. The microwave stirring antenna is located between the bottom wall 1a2 of the cavity and the partition 15. Therefore, a large distance needs to be maintained between the bottom wall 1a2 of the cavity and the partition 15 to install the microwave stirring antenna. At the same time, a large space also needs to be made below the bottom wall 1a2 of the cavity to install the motor. As a result, a large space needs to be reserved below the partition 15 to install the motor and the stirring antenna. Under the condition that the external dimensions of the cooking appliance 1 remain unchanged, the above design requires sacrificing the volume of the cooking cavity 1a.

[0067] The cooking appliance 1 provided in this application embodiment facilitates the feeding of microwaves from both vertical and horizontal directions through the first microwave feed inlet 121a and the second microwave feed inlet 122a distributed on different side cavity walls, thereby heating the food and improving 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 can be formed between the cavity bottom wall 1a2 and the partition 15. Through the design of the first recess 1a21, the distance between the cavity bottom wall 1a2 and the partition 15 can be smaller, and there is no need to make room for the motor below the cavity bottom wall 1a2. Thus, the space below the partition 15 can be made smaller. Therefore, while maintaining the same external dimensions of the cooking appliance 1 and ensuring microwave uniformity, it is also beneficial to increase the volume of the cooking cavity 1a.

[0068] In some embodiments, please refer to Figure 1 The cavity wall includes a first cavity sidewall, and the microwave generating assembly 13 and the second microwave feed inlet 122a are located on the first cavity sidewall.

[0069] For example, the microwave generating assembly 13 includes a magnetron 131 for generating microwaves. The magnetron 131 is disposed above the second microwave feed inlet 122a. The waveguide channel 12a is used to sequentially conduct the microwaves generated by the magnetron 131 to the second microwave feed inlet 122a and the first microwave feed inlet 121a.

[0070] Please refer to Figures 1 to 2 The microwave generating assembly 13 includes a magnetron 131, which is used to generate microwaves.

[0071] For example, please refer to Figures 1 to 2 The cooking appliance 1 also includes a transformer assembly 14, which is electrically connected to the magnetron 131 and is used to supply power to the magnetron 131.

[0072] For example, please refer to Figures 1 to 2 The transformer assembly 14 is located below the second microwave feed inlet 122a.

[0073] In related technologies, the magnetron 131 is located below the second microwave feed inlet 122a, and the transformer assembly 14 is located above the second microwave feed inlet 122a. The transformer assembly 14 is relatively heavy, and the transformer assembly 14 located above the second microwave feed inlet 122a may have an unstable installation structure, which may lead to deformation and reduce the reliability of the cooking appliance 1.

[0074] Therefore, by placing the magnetron 131 above the second microwave feed inlet 122a, the space below the second microwave feed inlet 122a can be reserved, for example, to install heavier components such as the transformer assembly 14. This can lower the center of gravity of the cooking appliance 1, improve the problem of unstable installation structure of the transformer assembly 14 leading to deformation, and thus improve the reliability of the cooking appliance 1.

[0075] For example, the first microwave feed inlet 121a and the second microwave feed inlet 122a are arranged in series in the waveguide channel 12a, so that the microwaves generated by the microwave generating component 13 are sequentially conducted to the second microwave feed inlet 122a and the first microwave feed inlet 121a. That is, the microwaves generated by the microwave generating component 13 are first conducted to the second microwave feed inlet 122a, and the remaining microwave energy continues to be conducted along the waveguide channel 12a to the first microwave feed inlet 121a. This is beneficial for adjusting the energy distribution of the first microwave feed inlet 121a and the second microwave feed inlet 122a, which is beneficial for improving the uniformity of the electric field in the cooking cavity 1a, thereby facilitating uniform heating of food and improving the cooking effect.

[0076] Because microwaves have limited penetration depth into food, uneven microwave distribution within the cooking cavity 1a can easily lead to uneven heating of the food, reducing the cooking effect of the cooking appliance 1. In some related technologies, the microwave feed is concentrated from the right-side cavity wall. Food is placed on a rotating turntable, and rotation improves the cooking effect, but the bottom of the food is difficult to heat, resulting in noticeable uneven heating. In other related technologies, the microwave feed is concentrated from the bottom wall 1a2 of the cavity. The food does not need to be rotated for heating; however, when foods such as milk cups are placed in the cavity, the upper part of the milk cup is difficult to heat, also resulting in noticeable uneven heating.

[0077] Therefore, the cooking appliance 1 provided in this application embodiment, through the first microwave feed inlet 121a and the second microwave feed inlet 122a distributed on different side cavity walls, facilitates the feeding of microwaves from both the vertical and horizontal directions to heat food, improves heating uniformity, and enhances the cooking effect of the cooking appliance 1. Furthermore, it improves the rationality of microwave distribution within the cooking cavity 1a, enabling both rapid heating of food and improved heating uniformity in the vertical direction, which is beneficial for enhancing the cooking effect of the cooking appliance 1. In addition, by placing the magnetron 131 above the second microwave feed inlet 122a, space can be reserved below the second microwave feed inlet 122a for, for example, installing heavier components such as the transformer assembly 14, thereby lowering the center of gravity of the cooking appliance 1 and improving its reliability.

[0078] In some embodiments, please refer to Figures 3 to 6 The cooking appliance 1 includes a first shell 121 and a second shell 122 connected to each other. The first shell 121 is located on the side of the first cavity sidewall away from the cooking cavity 1a, and the second shell 122 is located on the side of the cavity bottom wall 1a2 away from the cooking cavity 1a. The first shell 121 and the first cavity sidewall together enclose a part of the waveguide channel 12a, and the second shell 122 and the cavity bottom wall 1a2 together enclose another part of the waveguide channel 12a.

[0079] Understandably, both the first shell portion 121 and the second shell portion 122 possess a certain structural strength, enhancing the stability of the waveguide channel 12a and enabling it to stably conduct microwaves into the cooking cavity 1a through the first microwave feed inlet 121a and the second microwave feed inlet 122a. Furthermore, since the first cavity sidewall and cavity bottom wall 1a2 can participate in the formation of the waveguide channel 12a, it is unnecessary for the first shell portion 121 and the second shell portion 122 to independently enclose a portion of the waveguide channel 12a. This simplifies the structure of the first shell portion 121 and the second shell portion 122, reducing their size and thus minimizing the space occupied by the waveguide channel 12a within the cooking appliance 1, thereby improving the space utilization rate within the cooking appliance 1.

[0080] For example, a microwave generating assembly 13 is mounted on the first housing portion 121. The microwave generating assembly 13 includes a magnetron 131, which passes through the first housing portion 121 and extends between the first cavity sidewall and the first housing portion 121. In this way, the space between the first cavity sidewall and the first housing portion 121 can be fully utilized to accommodate the magnetron 131, which is beneficial to improving the space utilization of the cooking appliance 1.

[0081] For example, the first housing 121 and the second housing 122 are an integral structure. It is understood that this can improve the connection strength between the first housing 121 and the second housing 122 to ensure the stability of the waveguide channel 12a during use.

[0082] For example, the first shell portion 121 extends along the height direction, and the second shell portion 122 extends along the horizontal direction. It can be understood that the extension direction of the first shell portion 121 is perpendicular to the extension direction of the second shell portion 122, so that the first shell portion 121 and the second shell portion 122 are connected to form an approximate L-shape, which is reasonable in structure and easy to assemble.

[0083] In some embodiments, please refer to Figures 2 to 3 The microwave generating assembly 13 includes a magnetron mounting bracket 132 and a magnetron tube 131. The magnetron mounting bracket 132 is located on the side of the first housing 121 away from the cooking cavity 1a. The first housing 121 has a magnetron port 1222a. The magnetron tube 131 is mounted on the magnetron mounting bracket 132, with one end of the magnetron tube 131 passing through the magnetron port 1222a and extending into the first housing 121. It is understood that the magnetron mounting bracket 132 provides support for the microwave generating assembly 13, facilitating stable microwave generation and conduction through the magnetron port 1222a into the waveguide channel 12a, thus improving the operational stability of the cooking appliance 1. It should be noted that, along the microwave conduction direction, the distances between the magnetron port 1222a and the first microwave feed inlet 121a and the second microwave feed inlet 122a respectively meet the requirement of half a wavelength of microwave, allowing microwaves to pass through both the first and second microwave feed inlets 121a and 122a.

[0084] In some embodiments, please refer to Figures 1 to 3 The wavelength of the microwave fed into the waveguide channel 12a by the microwave generating component 13 is the first wavelength, and the distance between the geometric center of the second microwave feed inlet 122a and the waveguide output port of the microwave generating component 13 is a positive integer multiple of half of the first wavelength.

[0085] It should be noted that the specific shape of the second microwave feed inlet 122a is not limited here. Optionally, the second microwave feed inlet 122a can be a rectangular opening. The design of the rectangular second microwave feed inlet 122a can optimize the microwave transmission path and ensure the effective transmission and uniform distribution of microwave energy.

[0086] The microwave generated by the magnetron 131 has a first wavelength when it is fed into the waveguide channel 12a to ensure matching with the waveguide channel 12a and the second microwave feed inlet 122a.

[0087] It is understandable that the dimensions of the rectangular second microwave feed inlet 122a are designed based on the first wavelength to ensure optimal microwave transmission efficiency.

[0088] By setting the distance between the geometric center of the second microwave feed inlet 122a and the waveguide output port of the magnetron 131 to a positive integer multiple of half the first wavelength, the possibility of microwaves encountering reflection and forming standing waves during transmission in the waveguide channel 12a can be reduced, thereby reducing energy loss and the possibility of uneven heating.

[0089] For example, the distance between the geometric center of the second microwave feed inlet 122a and the waveguide output port of the magnetron 131 is 60 mm, which is half of the first wavelength.

[0090] For example, the waveguide channel 12a has a dimension of W perpendicular to the first direction, λg is the wavelength of the microwave in the waveguide channel 12a, that is, the wavelength of the microwave fed into the waveguide channel 12a by the magnetron 131 is the first wavelength λg, and λo is the wavelength of the microwave in the waveguide channel 12a. The conversion relationship between λo and λg is shown in the following formula:

[0091]

[0092] In other words, λg can be calculated according to the above formula, which makes it easier to set the positions of the magnetron 131, the first microwave feed inlet 121a and the second microwave feed inlet 122a.

[0093] In some embodiments, please refer to Figure 4 The second shell 122 includes a platform segment 121b and a connecting segment 121c. One end of the connecting segment 121c is connected to the first shell 121. The platform segment 121b is located at the end of the connecting segment 121c away from the first shell 121. On a projection plane perpendicular to the height direction of the cooking appliance 1, the projection of the first microwave feed inlet 121a is located within the projection of the platform segment 121b. The platform segment 121b and the cavity bottom wall 1a2 enclose the first channel.

[0094] For example, platform segment 121b and connecting segment 121c are arranged along a first direction, and the dimension of platform segment 121b perpendicular to the first direction is larger than the dimension of connecting segment 121c perpendicular to the first direction. Here, the first direction can be a left-right direction, in which case the dimension of platform segment 121b in the front-back direction is larger than the dimension of connecting segment 121c in the front-back direction.

[0095] Understandably, by fully utilizing the dimensions of the platform segment 121b along the front-to-back direction, the area of ​​the first microwave feed inlet 121a can be maximized, thereby increasing the amount of microwaves entering the cooking cavity 1a through the first microwave feed inlet 121a, and thus improving the cooking effect of the cooking appliance 1. Furthermore, the first microwave feed inlet 121a can be positioned as close as possible to the edge of the cavity bottom wall 1a2, reducing the possibility of microwave dead zones at the edge of the cavity bottom wall 1a2, thereby improving the heating uniformity at the edge of the cooking cavity 1a.

[0096] In some embodiments, please refer to Figures 3 to 5 On a cross section perpendicular to the height direction of the cooking appliance 1, the cross section of the waveguide channel 12a within the platform segment 121b is circular or a portion of a circle.

[0097] For example, the diameter of the cross-section of the waveguide channel 12a within the platform segment 121b is greater than the dimension of the connecting segment 121c in the direction perpendicular to the first direction.

[0098] In some embodiments, please refer to Figure 1 and Figure 2 The number of first microwave feed inlets 121a is multiple, and the multiple first microwave feed inlets 121a are arranged circumferentially along the cavity bottom wall 1a2 and extend radially along the cavity bottom wall 1a2.

[0099] Here, the circumferential spacing of each first microwave feed inlet 121a along the cavity bottom wall 1a2 means that, with the center of the cavity bottom wall 1a2 as the center, each first microwave feed inlet 121a is circumferentially spaced along the center of that circle.

[0100] In other words, the multiple first microwave feed inlets 121a are radially distributed on the cavity bottom wall 1a2, or the multiple first microwave feed inlets 121a are arranged in a ring array.

[0101] This allows microwaves to be fed into the cooking cavity 1a in a radial pattern, enabling microwaves fed into multiple first microwave inlets 121a to exhibit different polarization directions. This facilitates the radiation of microwaves over a larger area, ensuring that microwaves fill different positions within the cooking cavity 1a and improving the uniformity of microwave distribution within the cooking cavity 1a, thereby enhancing the cooking effect of the cooking appliance 1.

[0102] For example, please refer to Figure 1 and Figure 2 , the cavity bottom wall 1a2 includes four quadrant regions, and at least one first microwave feed port 121a is arranged in each quadrant region. In this way, the first microwave feed ports 121a are evenly distributed on the cavity bottom wall 1a2, so that microwaves fed through the plurality of first microwave feed ports 121a can fill different positions of the cooking cavity 1a, which is beneficial to improving the microwave uniformity in the cooking cavity 1a. In addition, it is convenient for the microwaves fed from the first microwave feed ports 121a to cover the cavity bottom wall 1a2 as much as possible, and radiate and heat the food along the height direction, which can improve the heating uniformity of the bottom of the food and shorten the heating time of the food.

[0103] It should be noted that the four quadrant regions are four quadrant regions defined by two coordinate axes in a two-dimensional rectangular coordinate system. The origin O of the two-dimensional rectangular coordinate system is located at the bottom side of the center point of the cavity bottom wall 1a2, that is, the intersection of the diagonals of the cavity bottom wall 1a2, the x-axis of the rectangular coordinate system is parallel to the horizontal direction, and the y-axis of the rectangular coordinate system is parallel to the front-rear direction.

[0104] In some embodiments, please refer to Figure 1 and Figure 2 , the first microwave feed ports 121a corresponding to the four quadrant regions are arranged axisymmetrically relative to the coordinate axes and / or are arranged centrosymmetrically relative to the origin of the four quadrant regions. In this way, the first microwave feed ports 121a in the four quadrant regions can be evenly distributed, which can further help improve the uniformity of microwave distribution in the cooking cavity 1a.

[0105] It should be noted that the above technical solutions include the following several types: the first type, the first microwave feed ports 121a corresponding to the four quadrant regions are arranged axisymmetrically relative to the coordinate axes; the second type, the first microwave feed ports 121a corresponding to the four quadrant regions are arranged centrosymmetrically relative to the origin of the four quadrant regions; the third type, the first microwave feed ports 121a corresponding to the four quadrant regions are arranged axisymmetrically relative to the coordinate axes and are also arranged centrosymmetrically relative to the origin of the four quadrant regions.

[0106] In some embodiments, please refer to Figure 1 and Figure 2 , the wavelength of the microwave fed into the waveguide channel 12a by the microwave generating assembly 13 is a first wavelength, the length dimension of the first microwave feed port 121a is not less than a quarter of the first wavelength, and the width dimension of the first microwave feed port 121a is not less than 10 mm.

[0107] In this embodiment, the first microwave feed port 121a is in a straight shape of a horizontal line.

[0108] In this way, the size of the first microwave feed port 121a is reasonable, which facilitates microwaves to be fed into the cooking cavity 1a through the first microwave feed port 121a, and can also reduce the risk of discharge sparking and the like.

[0109] For example, please refer to Figure 3 The second microwave feed inlet 122a has a dimension along its extension direction that is not less than one-quarter of the first wavelength and is at most equal to the width of the waveguide. The second microwave feed inlet 122a has a dimension along its extension direction that is not less than 10 mm, which can reduce the risk of discharge arcing.

[0110] Of course, in other embodiments, the first microwave feed inlet 121a can also be replaced by other types of slot structures, such as "arc" or "S" shaped.

[0111] The various embodiments / implementations provided in this application can be combined with each other without creating contradictions.

[0112] The above description is merely a preferred embodiment of this application and is not intended to limit the application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A cooking utensil, characterized in that, The cooking appliance has a cooking cavity, and the cooking appliance includes: The cavity wall, the cooking cavity is located within the space formed by the cavity wall, the cavity wall includes a cavity side wall, a cavity top wall and a cavity bottom wall, and the cavity bottom wall is provided with a first microwave feed inlet; Microwave generating assembly, used to generate microwaves; A waveguide channel is used to conduct microwaves generated by the microwave generating component to the cooking cavity through the first microwave feed inlet. The waveguide channel includes a first channel located below the bottom wall of the cavity. In a cross-section perpendicular to the height direction of the cooking appliance, the cross-section of the first channel is circular or a portion of a circle.

2. The cooking utensil according to claim 1, characterized in that, At least one of the cavity sidewalls is provided with a second microwave feed inlet, through which the microwaves generated by the microwave generating component are conducted to the cooking cavity.

3. The cooking utensil according to claim 2, characterized in that, The cavity wall includes a first cavity sidewall, and the microwave generating assembly and the second microwave feed inlet are located on the first cavity sidewall.

4. The cooking utensil according to claim 3, characterized in that, The cooking appliance includes a first shell and a second shell connected to each other. The first shell is located on the side of the first cavity sidewall away from the cooking cavity, and the second shell is located on the side of the cavity bottom wall away from the cooking cavity. The first shell and the first cavity sidewall together enclose a portion of the waveguide channel, and the second shell and the cavity bottom wall together enclose another portion of the waveguide channel.

5. The cooking utensil according to claim 4, characterized in that, The microwave generating assembly includes a magnetron mounting bracket and a magnetron tube. The magnetron mounting bracket is disposed on the side of the first housing portion away from the cooking cavity. The first housing portion has a magnetron port. The magnetron tube is mounted on the magnetron mounting bracket, with one end of the magnetron tube passing through the magnetron port and extending into the first housing portion; and / or, The first shell and the second shell are an integral structure.

6. The cooking utensil according to claim 4, characterized in that, The second shell includes a platform segment and a connecting segment. One end of the connecting segment is connected to the first shell. The platform segment is located at the end of the connecting segment away from the first shell. On a projection plane perpendicular to the height direction of the cooking appliance, the projection of the first microwave feed inlet is located within the projection of the platform segment. The platform segment and the cavity bottom wall enclose the first channel.

7. The cooking utensil according to claim 6, characterized in that, The platform segment and the connecting segment are arranged along a first direction, and the dimension of the platform segment perpendicular to the first direction is greater than the dimension of the connecting segment perpendicular to the first direction.

8. The cooking utensil according to claim 7, characterized in that, The number of first microwave feed ports is multiple, and the multiple first microwave feed ports are arranged circumferentially along the bottom wall of the cavity, and the first microwave feed ports extend radially along the bottom wall of the cavity.

9. The cooking utensil according to claim 8, characterized in that, The cavity bottom wall includes four quadrants, and each quadrant is provided with at least one of the first microwave feed inlets.

10. The cooking utensil according to claim 1, characterized in that, The microwave fed into the waveguide channel by the microwave generating component has a wavelength of a first wavelength, the length of the first microwave feed inlet is not less than one-quarter of the first wavelength, and the width of the first microwave feed inlet is not less than 10 mm.

11. The cooking utensil according to claim 2, characterized in that, The wavelength of the microwave fed into the waveguide channel by the microwave generating component is a first wavelength, and the distance between the geometric center of the second microwave feed inlet and the waveguide output port of the microwave generating component is a positive integer multiple of half of the first wavelength.

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