A cooking appliance

Abstract

This application provides a cooking appliance with a cooking cavity, including a cavity wall, a microwave generating assembly, and a waveguide channel. The cooking cavity is located within a space enclosed by the cavity wall, which includes a cavity sidewall and a cavity bottom wall. Both the cavity bottom wall and the cavity sidewall are provided with microwave feed inlets. The microwave generating assembly generates microwaves. The waveguide channel conducts the microwaves generated by the microwave generating assembly to the cooking cavity through the microwave feed inlets. A portion of the cavity bottom wall protrudes into the waveguide channel to form one or more first protrusions, and a first microwave feed inlet is formed on each of these first protrusions. By forming the first microwave feed inlet on the first protrusion, the first microwave feed inlet protrudes beyond the plane of the corresponding cavity wall, increasing the distance between the first microwave feed inlet and the glass plate. This reduces the possibility of microwaves radiated from the first microwave feed inlet focusing on the glass plate, improving the operational safety of the cooking appliance.

Description

[0001] Cross-references to related applications

[0002] This application is based on and claims priority to Chinese Patent Application No. 202510933073.4, filed on July 7, 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 cause the molecules in the food to vibrate, thus heating the food and achieving cooking. However, microwaves within the cooking cavity are prone to focusing, affecting the safety of the cooking appliance. Utility Model Content

[0005] In view of this, the embodiments of this application aim to provide a cooking appliance that reduces the possibility of microwave focusing and improves the safety of using the cooking appliance.

[0006] This application provides a cooking appliance, the cooking appliance having a cooking cavity, the cooking appliance comprising:

[0007] The cooking cavity is located within the space enclosed by the cavity wall. The cavity wall includes a cavity sidewall and a cavity bottom wall. Both the cavity bottom wall and the cavity sidewall are provided with microwave feed inlets.

[0008] Microwave generating assembly, used to generate microwaves;

[0009] A waveguide channel is provided for transmitting microwaves generated by the microwave generating component to the cooking cavity through the microwave feed inlet.

[0010] A portion of the cavity bottom wall protrudes into the waveguide channel to form one or more first protrusions, and the microwave feed inlet includes a first microwave feed inlet, which is formed in the first protrusion.

[0011] In some implementations, the distance between the first microwave feed inlet and the plane containing the cavity bottom wall is 1 mm to 30 mm.

[0012] In some implementations, the distance between the first microwave feed inlet and the plane containing the cavity bottom wall is 2mm to 8mm.

[0013] In some embodiments, the cooking appliance includes a partition located at the bottom of the cooking cavity and above the bottom wall of the cavity, the partition being used to place food;

[0014] The distance between the partition and the plane containing the bottom wall of the cavity is 5mm to 23mm.

[0015] In some embodiments, the cooking appliance includes a partition located at the bottom of the cooking cavity and above the bottom wall of the cavity, the partition being used to place food;

[0016] 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.

[0017] 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 1 mm to 30 mm.

[0018] 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 2 mm to 10 mm.

[0019] In some implementations, the first protrusion is constricted in the direction from the plane of the cavity bottom wall toward the waveguide channel.

[0020] In some embodiments, the cavity bottom wall includes a recess and an annular platform portion, the platform portion surrounding the outer periphery of the recess, the bottom wall of the recess forming the cavity bottom wall, the cooking appliance including a partition disposed within the recess, the partition for placing food, and an empty space formed between the cavity bottom wall and the partition.

[0021] In some embodiments, the recess includes a side wall disposed along the edge of the cavity bottom wall, the side wall having a stepped surface, and the partition being supported on the stepped surface.

[0022] In some embodiments, the microwave feed inlet includes a second microwave feed inlet formed in the plane of the cavity bottom wall.

[0023] In some implementations, the cavity floor wall includes four quadrants, each quadrant having at least one of the first microwave feed inlets.

[0024] In some implementations, the cavity bottom wall includes a first region and a second region, the boundary line between the first region and the second region passing through the center of the cavity bottom wall and perpendicular to the extension direction of the waveguide channel below the cavity bottom wall, and the first region being closer to the microwave generating component than the second region;

[0025] The cavity bottom wall has five first microwave feed inlets, four of which are distributed in the four quadrants of the cavity bottom wall; the remaining one of the five first microwave feed inlets is located in the area enclosed by the four first microwave feed inlets.

[0026] In some embodiments, the cooking appliance includes a waveguide housing assembly located outside the cooking cavity, the waveguide housing assembly and the cavity wall forming the waveguide channel.

[0027] In some embodiments, a portion of the cavity sidewall protrudes into the waveguide channel to form one or more second protrusions, and the microwave feed inlet includes a third microwave feed inlet formed in the second protrusion.

[0028] The cooking appliance of this application embodiment, on the one hand, by forming the first microwave feed inlet on the first protrusion, so that the first microwave feed inlet protrudes from the plane of the corresponding cavity wall, can increase the distance between the first microwave feed inlet and the glass plate, thereby reducing the possibility of microwaves radiated from the first microwave feed inlet forming a focusing phenomenon on the glass plate and improving the operational safety of the cooking appliance; on the other hand, the first protrusion can act as a reinforcing rib, improving the structural strength of the cavity wall while making the shape of the first microwave feed inlet less prone to deformation. Furthermore, the microwave feed inlets distributed on different side cavity walls facilitate the feeding of microwaves from both vertical and horizontal directions, heating food and improving heating uniformity. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the internal structure of the cooking appliance provided in the first embodiment of this application;

[0030] Figure 2 for Figure 1 A schematic diagram of the structure of the cavity floor wall;

[0031] Figure 3 This is a schematic diagram of the internal structure of the cooking appliance provided in the second embodiment of this application;

[0032] Figure 4 This is a schematic diagram of the internal structure of the cooking appliance provided in the third embodiment of this application;

[0033] Figure 5 for Figure 4Schematic diagram of the cross section at point AA;

[0034] Figure 6 This is a schematic diagram of the internal structure of the cooking appliance provided in the fourth embodiment of this application;

[0035] Figure 7 This is a schematic diagram of the internal structure of the cooking appliance provided in the fifth embodiment of this application;

[0036] Figure 8 for Figure 7 Schematic diagram of the cross section at point BB;

[0037] Figure 9 This is a schematic diagram of the structure of the bottom wall of the cavity of the cooking appliance provided in the sixth embodiment of this application;

[0038] Figure 10 for Figure 9 A diagram from another perspective;

[0039] Figure 11 for Figure 9 Cross-sectional view at point CC;

[0040] Figure 12 This is a schematic diagram of the internal structure of the cooking appliance provided in the seventh embodiment of this application;

[0041] Figure 13 This is a schematic diagram of the internal structure of the cooking appliance provided in the eighth embodiment of this application;

[0042] Figure 14 for Figure 13 Enlarged diagram of point D in the middle.

[0043] Explanation of reference numerals in the attached figures

[0044] 1. Cooking appliance; 1a. Cooking cavity; 1b1. Cavity sidewall; 1b2. Cavity bottom wall; 1b21. First region; 1b22. Second region; 1ba. Recess; 1ba1. Side wall; 1ba2. Stepped surface; 1ba3. Bottom wall; 1bb. Platform section; 1c. Loading / unloading port; 2. Partition; 2a. Empty space; 3. Waveguide shell assembly; 31. First shell section; 32. Second shell section; 3a. Waveguide channel; 4. First protrusion; 4a. First microwave feed inlet; 4b. Second microwave feed inlet; 5. Second protrusion; 5a. Third microwave feed inlet; 6. Microwave generating assembly. Detailed Implementation

[0045] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0046] The specific technical features described in the specific embodiments can be combined in any suitable manner without contradiction. For example, different combinations of specific technical features can form different embodiments and technical solutions. To avoid unnecessary repetition, the various possible combinations of the specific technical features in this application will not be described separately.

[0047] In the following description, the terms "first," "second," etc., are used merely to distinguish different objects and do not indicate that the objects have the sameness or relationship. It should be understood that the directional descriptions "above," "below," "outside," and "inside" refer to the orientation under normal use conditions, while "left" and "right" refer to the left and right directions shown in the corresponding diagrams, which may or may not be the left and right directions under normal use conditions.

[0048] It should be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. "A plurality of" means two or more.

[0049] This application provides a cooking utensil 1, please refer to... Figure 1 , Figure 3 , Figure 4 , Figure 6 and Figure 7 The cooking appliance 1 has a cooking cavity 1a, which includes a cavity wall, a microwave generating component 6, and a waveguide channel 3a.

[0050] It should be noted that the specific type of cooking utensil 1 is not limited here.

[0051] 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.

[0052] Please refer to Figure 1 , Figure 3 , Figure 4 , Figure 6 and Figure 7 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.

[0053] Please refer to Figure 1 , Figure 3 , Figure 4 , Figure 6 and Figure 7 The cavity wall includes a top wall, a side wall 1b1, and a bottom wall 1b2. Both the bottom wall 1b2 and the side wall 1b1 are provided with microwave feed inlets.

[0054] 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 arrows in the medium altitude direction.

[0055] For example, please refer to Figure 1 , Figure 3 , Figure 4 , Figure 6 and Figure 7 The cooking cavity 1a has a loading / unloading port 1c 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 port 1c.

[0056] For ease of understanding, in this embodiment, the side where the opening 1c is located is designated as the front side, and the side opposite to the opening 1c 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 height direction. The front-back direction, left-right direction, and height direction constitute a three-dimensional Cartesian coordinate system.

[0057] It should be noted that the cavity sidewall 1b1 refers to the remaining parts of the cavity wall excluding the cavity top wall and cavity bottom wall 1b2. For example, it could be the cavity wall on the left side, the right side, or the rear side of the cooking cavity 1a.

[0058] The cavity sidewall 1b1 is provided with a microwave feed inlet, which can be provided on at least one of the cavity wall on the left side of the cooking cavity 1a1, the cavity wall on the right side of the cooking cavity 1a1, or the cavity wall on the rear side of the cooking cavity 1a1.

[0059] Microwave generator 6 is used to generate microwaves. Understandably, microwaves are used to heat food.

[0060] It should be noted that the specific structure of the microwave generating component 6 is not limited.

[0061] It should be noted that there is no limit to the specific frequency of microwaves. For example, the frequency of microwaves is 2.4 to 2.5 GHz (gigahertz, a unit of frequency).

[0062] Waveguide channel 3a is used to conduct microwaves generated by microwave generator 6 through microwave feed inlet to cooking cavity 1a, so as to heat the food in cooking cavity 1a.

[0063] Understandably, when food is placed in the cooking cavity 1a for cooking, microwaves radiated from the microwave feed inlet on the bottom wall 1b2 of the cavity can heat the food from the bottom, while microwaves radiated from the microwave feed inlet on the side wall 1b1 can heat food of a certain height, such as a glass containing milk. This allows for rapid heating of the food while also improving the uniformity of heating along its height, thus enhancing the cooking effect of the cooking appliance 1.

[0064] In related technologies, taking microwave ovens as an example, in order to reduce the possibility of food residue entering waveguide channel 3a through the microwave feed inlet, a glass plate is used to cover the microwave feed inlet. When the microwave oven is running unloaded, the microwaves radiated from the microwave feed inlet are prone to accumulate on the glass plate, causing damage to the glass plate.

[0065] Therefore, please refer to the embodiments of this application. Figure 5 , Figure 8 , Figure 10 and Figure 11 One or more first protrusions 4 are formed by a local protrusion of the cavity bottom wall 1b2 into the waveguide channel 3a. The microwave feed inlet includes a first microwave feed inlet 4a, which is formed in the first protrusion 4.

[0066] The cooking appliance 1 provided in this application embodiment, on the one hand, by forming the first microwave feed inlet 4a on the first protrusion 4, so that the first microwave feed inlet 4a protrudes from the plane of the cavity bottom wall 1b2, can increase the distance between the first microwave feed inlet 4a and the glass plate, thereby reducing the possibility of microwaves radiated from the first microwave feed inlet 4a forming a focusing phenomenon on the glass plate and improving the operational safety of the cooking appliance 1; on the other hand, the first protrusion 4 can act as a reinforcing rib, improving the structural strength of the cavity bottom wall 1b2 while making the shape of the first microwave feed inlet 4a less prone to deformation. In addition, the microwave feed inlets distributed on different side cavity walls can facilitate the feeding of microwaves from both the vertical and horizontal directions to heat food, improving heating uniformity.

[0067] It should be noted that the specific degree of protrusion of the first microwave feed inlet 4a relative to the cavity bottom wall 1b2 toward the plane is not limited.

[0068] In some embodiments, please refer to Figure 5 , Figure 8 , Figure 10 and Figure 11 The distance between the first microwave feed inlet 4a and the plane containing the cavity bottom wall 1b2 (e.g.) Figure 5The distance H (as shown in the figure) ranges from 1mm to 30mm, meaning 30mm ≥ H ≥ 1mm. For example, H can be 1mm, 2mm, 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, 15mm, 20mm, 25mm, or 30mm, etc. This ensures that the distance H between the first microwave feed inlet 4a and the plane containing the cavity bottom wall 1b2 is reasonable, and that the distance between the first microwave feed inlet 4a and the glass plate is reasonable, so that the microwaves radiated from the first microwave feed inlet 4a are less likely to accumulate on the glass plate. Furthermore, ensuring that the first microwave feed inlet 4a does not protrude excessively relative to the plane of the cavity bottom wall 1b2 serves two purposes. First, it reduces the disturbance of the magnetic field within the waveguide channel 3a by the edge of the first microwave feed inlet 4a, lowering the possibility of the magnetic field within the waveguide channel 3a being disturbed into higher-order modes, thus ensuring that the first microwave feed inlet 4a can stably cut the surface current of the waveguide channel 3a and radiate microwaves. Second, it also reduces the microwave reflection effect of the protruding part of the first microwave feed inlet 4a, reducing the standing wave phenomenon within the waveguide channel 3a and improving the microwave transmission efficiency within the waveguide channel 3a.

[0069] In some embodiments, please refer to Figure 5 , Figure 8 , Figure 10 and Figure 11 The distance H between the first microwave feed inlet 4a and the plane of the corresponding cavity bottom wall 1b2 is 2mm to 8mm, that is, 2mm≤H≤8mm. For example, H can be 2mm, 3mm, 4mm, 5mm, 6mm, 7mm or 8mm, etc.

[0070] In some embodiments, please refer to Figure 8 , Figure 9 and Figure 11 The minimum distance between the edge of the projection of the first microwave feed inlet 4a and the edge of the projection of the first protrusion 4, as shown in the orthographic projection onto the plane where the cavity bottom wall 1b2 is located (e.g., ... Figure 9 The value of D (as shown in the figure) ranges from 1mm to 30mm, i.e., 1mm ≤ D ≤ 30mm. For example, D can be 1mm, 2mm, 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, 11mm, 12mm, 15mm, 20mm, 25mm, or 30mm, etc. This ensures that the distance between the edge of the first protrusion 4 and the first microwave feed inlet 4a is reasonable, thereby guaranteeing the structural strength of the first microwave feed inlet 4a and preventing its shape from easily deforming.

[0071] In some embodiments, please refer to Figure 8 , Figure 9 and Figure 11The minimum distance between the edge of the projection of the first microwave feed inlet 4a and the edge of the projection of the first protrusion 4 on the plane where the cavity bottom wall 1b2 is located is 1mm to 10mm, that is, 2mm≤D≤10mm. For example, D can be 2mm, 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm or 10mm, etc.

[0072] It should be noted that the specific shape of the first protrusion 4 is not limited.

[0073] In some embodiments, please refer to Figure 7 and Figure 8 From the bottom wall 1b2 of the cavity towards the waveguide channel 3a, the first protrusion 4 is constricted. That is, from the inside of the waveguide channel 3a towards the cavity wall, the first protrusion 4 is diffused, so that the microwaves radiated from the first microwave feed inlet 4a can enter the cooking cavity 1a after being diffused by the protrusion, thereby expanding the microwave coverage area, reducing the microwave distribution blind zone, and improving the cooking effect of the cooking cavity 1a.

[0074] For example, please refer to Figure 4 and Figure 5 On the cross-section at AA, the outer contour of the first protrusion 4 is rectangular, and the first microwave feed inlet 4a is located on the long side of the rectangle.

[0075] For example, please refer to Figure 7 and Figure 8 On the cross-section at BB, the outer contour of the first protrusion 4 is triangular, and the first microwave feed inlet 4a is located on one side of the triangle.

[0076] For example, please refer to Figure 9 and Figure 11 On the cross-sectional surface at CC, the outer contour of the first protrusion 4 is a trapezoid with a wider top and a narrower bottom, and the first microwave feed inlet 4a is located on the shorter side of the trapezoid. This allows the microwaves radiated from the first microwave feed inlet 4a to be better diffused by the first protrusion 4 before entering the cooking cavity 1a.

[0077] In some embodiments, the cooking appliance 1 includes a partition 2 located at the bottom of the cooking cavity 1a and above the cavity bottom wall 1b2, the partition 2 being used to place food. It is understood that the partition 2 has a certain structural strength to support the food and food containers.

[0078] For example, please refer to Figure 13 and Figure 14 The distance between the partition 2 and the plane containing the cavity bottom wall 1b2 (e.g.) Figure 14The distance H1 (as shown in the figure) is 5mm to 23mm, that is, 5mm≤H1≤23mm. For example, H1 can be 5mm, 10mm, 15mm, 20mm, or 23mm. This makes the distance H1 between the partition 2 and the bottom wall 1b2 of the cavity reasonable, and the microwaves can be dispersed in the space between the partition 2 and the bottom wall 1b2 of the cavity, improving the uniformity of microwave distribution and improving the cooking effect of the cooking cavity 1a.

[0079] In some embodiments, please refer to Figure 13 and Figure 14 The distance H1 between the partition 2 and the cavity bottom wall 1b2 is the first distance, and the distance H between the first microwave feed inlet 4a and the plane where the cavity bottom wall 1b2 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≤H1 / H≤1.8.

[0080] Thus, the ratio of the first distance to the second distance is reasonable, which ensures that the space between the partition 2 and the cavity bottom wall 1b2 is reasonable, so that the microwaves radiated from the microwave feed inlet of the cavity bottom wall 1b2 have enough space to disperse, and also ensures that the distance between the first microwave feed inlet 4a and the glass plate is reasonable, so that the microwaves radiated from the first microwave feed inlet 4a are not prone to forming a concentration phenomenon on the glass plate.

[0081] In some embodiments, please refer to Figure 13 The cavity bottom wall 1b2 includes a recessed portion 1ba and an annular platform portion 1bb, with the platform portion 1bb surrounding the outer periphery of the recessed portion 1ba. The bottom wall of the recessed portion 1ba forms the cavity bottom wall 1b2. It can be understood that the recessed portion 1ba is recessed downward, which is beneficial to increasing the internal space of the cooking cavity 1a (i.e., increasing the volume of the cooking cavity 1a).

[0082] An empty space 2a is formed between the cavity bottom wall 1b2 and the partition 2. The empty space 2a refers to an unoccupied space, allowing microwaves fed into the cavity bottom wall 1b2 through the empty space 2a and the partition 2 directly. This means that the microwaves entering the empty space 2a can pass directly through the partition 2, indicating that there are no components within the empty space 2a that could obstruct microwave conduction, thus reducing microwave losses during entry into the cooking cavity 1a from the microwave feed inlet of the cavity bottom wall 1b2. Furthermore, the empty space 2a also provides diffusion space for microwaves fed into the cavity bottom wall 1b2, facilitating microwave dispersion and reducing localized overheating caused by microwave concentration.

[0083] In this embodiment, the microwave feed inlet on the cavity bottom wall 1b2 is formed on the bottom wall 1ba3 of the recess. Furthermore, H1 refers to the distance between the partition 2 and the bottom wall 1ba3 in the height direction.

[0084] 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 1b2 of the cavity. The microwave stirring antenna is located between the bottom wall 1b2 of the cavity and the partition 2. Therefore, a large distance needs to be maintained between the bottom wall 1b2 of the cavity and the partition 2 to install the microwave stirring antenna. At the same time, a large space also needs to be made below the bottom wall 1b2 of the cavity to install the motor. As a result, a large space needs to be reserved below the partition 2 to install the motor and the stirring antenna. With the external dimensions of the cooking appliance 1 remaining unchanged, the above design requires sacrificing the volume of the cooking cavity 1a.

[0085] The cooking appliance 1 provided in this application embodiment has microwave feed inlets on both the bottom wall 1b2 and the side wall 1b1 of the cavity, which 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 2a can be formed between the bottom wall 1b2 and the partition 2. Through the design of the recessed part 1ba, the distance between the bottom wall 1b2 and the partition 2 can be smaller, and there is no need to make room for the motor below the bottom wall 1b2. Thus, the space below the partition 2 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.

[0086] In some embodiments, please refer to Figure 14 The recess 1ba includes a side wall 1ba1, which is disposed along the edge of the cavity bottom wall 1b2. The side wall 1ba1 has a stepped surface 1ba2, and the partition 2 is supported on the stepped surface 1ba2. It is understood that the stepped surface 1ba2 can provide support for the partition 2, thereby improving the stability of the partition 2 within the recess 1ba and allowing the food to be cooked to be cooked stably on the partition 2.

[0087] In some embodiments, please refer to Figure 12 and Figure 13 The cooking appliance 1 includes a waveguide shell assembly 3, which is located outside the cooking cavity 1a. The waveguide shell assembly 3 and the cavity wall form a waveguide channel 3a.

[0088] It is understandable that the waveguide shell assembly 3 has a cavity inside, and the waveguide shell assembly 3 is fastened to the outside of the cavity wall (the side of the cavity wall away from the cooking cavity 1a). The cavity wall and the waveguide shell assembly 3 together form a waveguide channel 3a. On the one hand, the formation of the waveguide channel 3a is simple, which can reduce the assembly difficulty of the cooking appliance 1 and improve the manufacturing efficiency of the cooking appliance 1. On the other hand, the waveguide shell assembly 3 is close to the cavity wall of the cooking cavity 1a, has a compact structure, and saves the internal space of the cooking appliance 1.

[0089] In one embodiment, please refer to Figure 12 and Figure 13 The waveguide housing assembly 3 includes a first housing portion 31 and a second housing portion 32 connected to each other. The first housing portion 31 extends along the height direction of the cooking appliance 1, and the second housing portion 32 extends along the left-right direction. It should be noted that the first housing portion 31 and the cavity sidewall 1b1 enclose a portion of the waveguide channel 3a, and the second housing portion 32 and the cavity bottom wall 1b2 enclose another portion of the waveguide channel 3a.

[0090] It is understandable that the extension direction of the first shell 31 is perpendicular to the extension direction of the second shell 32, making the structure of the waveguide shell assembly 3 approximately L-shaped. When the first shell 31 is located on the side of the cavity sidewall 1b1 away from the cooking cavity 1a, it is convenient for the second shell 32 to extend to the side of the cavity bottom wall 1b2, making the structure of the waveguide shell assembly 3 reasonable and reducing the space occupied by the waveguide shell assembly 3 in the cooking appliance 1.

[0091] In an embodiment where the cooking appliance 1 includes a waveguide shell assembly 3 and a waveguide cover assembly, the waveguide cover assembly includes a first waveguide cover and a second waveguide cover. The first waveguide cover and the first shell portion 31 are joined together in the left-right direction; the second waveguide cover and the second shell portion 32 are joined together in the height direction. This simplifies the structure of the waveguide shell assembly 3 and the waveguide cover assembly, making them easy to manufacture. It should be noted that the first waveguide cover and the first shell portion 31 form a portion of the waveguide channel 3a, and the second waveguide cover and the second shell portion 32 form another portion of the waveguide channel 3a.

[0092] In some embodiments, the first housing portion 31 and the second housing portion 32 are integral structures. It is understood that, on the one hand, this can improve the connection strength between the first housing portion 31 and the second housing portion 32, thereby ensuring the shape of the waveguide housing assembly 3 during use and the stability of the waveguide channel 3a, so that the waveguide channel 3a can stably conduct microwaves into the cooking cavity 1a through the first microwave feed inlet 4a and the second microwave feed outlet; on the other hand, it can reduce the assembly difficulty of the waveguide housing assembly 3, which is beneficial to improving the manufacturing efficiency of the waveguide housing assembly 3.

[0093] In some embodiments, the first waveguide cover and the second waveguide cover are an integral structure. This improves the connection strength between the two.

[0094] In some embodiments, the microwave feed inlet includes a second microwave feed inlet 4b, which is formed on the plane of the cavity bottom wall 1b2. In this embodiment, the cavity bottom wall 1b2 has multiple microwave feed inlets, some of which are first microwave feed inlets 4a, and others are second microwave feed inlets 4b.

[0095] It should be noted that the specific number of microwave feed entrances on the cavity bottom wall 1b2 is not limited.

[0096] For example, the number of microwave feed inlets on the cavity bottom wall 1b2 is multiple. All microwave feed inlets on the cavity bottom wall 1b2 can be first microwave feed inlet 4a, or all can be second microwave feed inlet 4b, or a portion can be first microwave feed inlet 4a and another portion can be second microwave feed inlet 4b.

[0097] In some embodiments, please refer to Figure 1 , Figure 4 , Figure 6 , Figure 7 and Figure 9 The cavity bottom wall 1b2 includes four quadrant regions, and each quadrant region is provided with at least one first microwave feed inlet 4a.

[0098] It is understandable that by providing at least one first microwave feed inlet 4a in each of the four quadrants of the bottom wall 1b2 of the cavity, the microwave distribution in the four quadrants of the bottom of the cooking cavity 1a can be improved, the microwave distribution blind zone can be reduced, and the heating uniformity can be further improved.

[0099] For example, the four first microwave feed inlets 4a are arranged in a rotationally symmetrical manner. In this way, in-phase microwave radiation can be generated to a certain extent, thereby increasing the radiation energy.

[0100] It should be noted that there is no limit to the specific number of microwave feed inlets provided on the cavity sidewall 1b1.

[0101] In some embodiments, a portion of the cavity sidewall 1b1 protrudes into the waveguide channel 3a to form one or more second protrusions 5, and the microwave feed inlet includes a third microwave feed inlet 5a formed on the second protrusions 5. Thus, the third microwave feed inlet 5a protrudes from the plane of the cavity sidewall 1b1, and the distance between the first microwave feed inlet 4a and the glass plate reduces the possibility of microwaves radiated from the first microwave feed inlet 4a focusing on the glass plate. Furthermore, the second protrusions 5 can act as reinforcing ribs, improving the structural strength of the cavity sidewall 1b1 while making the shape of the third microwave feed inlet 5a less prone to deformation.

[0102] For example, the microwave feed inlet includes a fourth microwave feed inlet, which is formed in the plane of the cavity sidewall 1b1.

[0103] For example, the number of microwave feed inlets on the cavity sidewall 1b1 is multiple. All microwave feed inlets on the cavity sidewall 1b1 can be third microwave feed inlets 5a, or all can be fourth microwave feed inlets, or a portion can be third microwave feed inlets 5a and another portion can be fourth microwave feed inlets.

[0104] It should be noted that the specific shape of the microwave feed inlet is not limited.

[0105] For example, the microwave feed inlet disposed on the cavity sidewall 1b1 is configured to be a shape formed by removing at least one apex corner of a rectangle.

[0106] Understandably, by removing at least one apex of the rectangle to form a shape with a microwave feed inlet, it is similar to chopping the corners of the rectangle. In this way, the apex can block the components of the electric field in other directions, making it easier to form the component of the electric field in the vertical direction. When the trajectory of the electric field vector changes from 0° to 360°, a circularly polarized wave can be formed. This allows the microwaves to form a more complex electromagnetic field distribution in the cooking cavity 1a, thereby expanding the coverage area of ​​the microwaves, reducing the microwave distribution blind zone, and improving the uniformity of heating.

[0107] For example, please refer to Figure 1 , Figure 4 , Figure 6 and Figure 9 The first microwave feed inlet 4a in each quadrant is arc-shaped. In this way, by setting the shape of the first microwave feed inlet 4a to arc, the design size can be shortened while meeting the radiation requirements, which is beneficial for arranging more second microwave feed inlets on the cavity bottom wall 1b2 and improving the design flexibility.

[0108] For example, please refer to Figure 7 The first microwave feed inlet 4a in each quadrant is rectangular. By setting the shape of the first microwave feed inlet 4a to rectangular, the manufacturing difficulty can be reduced while meeting radiation requirements, which is beneficial to improving the manufacturing efficiency of the cooking appliance 1.

[0109] In some embodiments, please refer to Figure 2 The cavity floor wall 1b2 includes a first region 1b21 and a second region 1b22, and the boundary line between the first region 1b21 and the second region 1b22 (please refer to...). Figure 2 As shown in Figure S, the waveguide channel 3a extends through the center of the cavity bottom wall 1b2 and perpendicular to the direction below the cavity bottom wall 1b2 (please refer to...). Figure 2 As shown in Figure X), the first region 1b21 is closer to the microwave generating assembly 6 than the second region 1b22. The cavity bottom wall 1b2 has five first microwave feed inlets 4a, four of which are distributed in the four quadrants of the cavity bottom wall 1b2, and the remaining one of the five first microwave feed inlets 4a is located in the area enclosed by the four first microwave feed inlets 4a.

[0110] Thus, by using the remaining first microwave feed inlet 4a, the intensity of microwave energy in the lower parts can be increased, and the uniformity of radiation from all microwave feed inlets of the cavity bottom wall 1b2 can be improved.

[0111] For example, the waveguide channel 3a below the cavity bottom wall 1b2 can extend from right to left, the first region 1b21 can be located on the right side, the second region 1b22 can be located on the left side, and the first region 1b21 and the second region 1b22 are respectively provided with two quadrants of the cooking cavity 1a.

[0112] It should be noted that, along the extension direction of the waveguide channel 3a, the microwave generated by the microwave generating component 6 is first radiated at the first microwave feed inlet 4a in the first region 1b21, and then radiated at the first microwave feed inlet 4a in the second region 1b22. This results in the energy coupled at the first region 1b21 being stronger than the energy coupled at the second region 1b22.

[0113] In this way, by setting the remaining one of the five first microwave feed inlets 4a in the second region 1b22, the intensity of the coupled energy at the downstream second region 1b22 can be increased, thereby improving the uniformity of the microwaves radiated by the five first microwave feed inlets 4a as a whole on the cavity bottom wall 1b2, reducing the microwave blind zone in the cooking cavity 1a, and improving the heating uniformity of the cooking cavity 1a.

[0114] The following is a brief description of some specific embodiments in conjunction with the accompanying drawings.

[0115] In the first embodiment

[0116] Please refer to Figure 1 and Figure 2 The cavity bottom wall 1b2 is provided with five first microwave feed inlets 4a. Four of the first microwave feed inlets 4a are distributed in the four quadrants of the cavity bottom wall 1b2, and the four first microwave feed inlets 4a are arc-shaped. The remaining first microwave feed inlet 4a is located in the second region 1b22, and the remaining first microwave feed inlet 4a is semi-circular.

[0117] The cavity sidewall 1b1 is provided with a third microwave feed inlet 5a, which is shaped by removing at least one vertices of a virtual rectangle.

[0118] On the cross-section of the first microwave feed inlet 4a along the thickness direction of the cavity bottom wall 1b2, the outer contour of the first protrusion 4 is a trapezoid with a wider upper side and a narrower lower side, and the first microwave feed inlet 4a is located on the short side of the trapezoid.

[0119] On the cross-section of the third microwave feed inlet 5a along the thickness direction of the cavity sidewall 1b1, the outer contour of the second protrusion 5 is a trapezoid with a wider upper side and a narrower lower side, and the third microwave feed inlet 5a is located on the short side of the trapezoid.

[0120] Second Embodiment

[0121] Please refer to Figure 3The main body is the same as that in the first embodiment, the difference being:

[0122] The cavity bottom wall 1b2 is provided with a first microwave feed inlet 4a and three second microwave feed inlets 4b. The first microwave feed inlet 4a and the three second microwave feed inlets 4b are distributed in the four quadrants of the cavity bottom wall 1b2. The first microwave feed inlet 4a and the three second microwave feed inlets 4b are all arc-shaped.

[0123] Third Embodiment

[0124] Please refer to Figure 4 The main body is the same as that in the first embodiment, the difference being:

[0125] The remaining first microwave feed inlet 4a mentioned above is in the shape of an arc.

[0126] Please refer to Figure 5 On the cross-section of the first microwave feed inlet 4a along the thickness direction of the cavity bottom wall 1b2, the outer contour of the first protrusion 4 is rectangular, and the first microwave feed inlet 4a is located on the long side of the rectangle.

[0127] Fourth embodiment

[0128] Please refer to Figure 6 The main body is the same as that in the third embodiment, the difference being:

[0129] The remaining first microwave feed inlet 4a mentioned above is circular.

[0130] Fifth embodiment

[0131] The main body is the same as that in the first embodiment, the difference is:

[0132] Please refer to Figure 7 The cavity bottom wall 1b2 is provided with four first microwave feed inlets 4a, which are distributed in the four quadrants of the cavity bottom wall 1b2. The first microwave feed inlets 4a are rectangular.

[0133] Please refer to Figure 8 On the cross-section of the first microwave feed inlet 4a along the thickness direction of the cavity bottom wall 1b2, the outer contour of the protrusion is triangular, and the first microwave feed inlet 4a is located on one side of the triangle.

[0134] Sixth Embodiment

[0135] Please refer to Figure 9 The main body is the same as that in the first embodiment, the difference being:

[0136] The cavity bottom wall 1b2 is provided with four first microwave feed inlets 4a, which are distributed in the four quadrants of the cavity bottom wall 1b2 and are arc-shaped.

[0137] In the description of this application, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the embodiments of this application. In this application, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Furthermore, without contradiction, those skilled in the art can combine different embodiments or examples described in this application, as well as features of different embodiments or examples.

[0138] 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 cooking cavity is located within the space enclosed by the cavity wall. The cavity wall includes a cavity sidewall and a cavity bottom wall. Both the cavity bottom wall and the cavity sidewall are provided with microwave feed inlets. Microwave generating assembly, used to generate microwaves; A waveguide channel is provided for transmitting microwaves generated by the microwave generating component to the cooking cavity through the microwave feed inlet. A portion of the cavity bottom wall protrudes into the waveguide channel to form one or more first protrusions, and the microwave feed inlet includes a first microwave feed inlet, which is formed in the first protrusion.

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

3. The cooking utensil according to claim 1, characterized in that, The distance between the first microwave feed inlet and the plane containing the cavity bottom wall is 2mm to 8mm.

4. The cooking utensil according to claim 1, characterized in that, The cooking appliance includes a partition located at the bottom of the cooking cavity and above the bottom wall of the cavity, the partition being used to place food; The distance between the partition and the plane containing the bottom wall of the cavity is 5mm to 23mm.

5. The cooking utensil according to claim 1, characterized in that, The cooking appliance includes a partition located at the bottom of the cooking cavity and 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.

6. The cooking utensil according to claim 1, 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.

7. The cooking utensil according to claim 1, 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 2mm to 10mm.

8. The cooking utensil according to claim 1, characterized in that, The first protrusion is constricted in the direction from the plane of the cavity bottom wall toward the waveguide channel.

9. The cooking utensil according to any one of claims 1 to 8, characterized in that, The cavity bottom wall includes a recessed portion and an annular platform portion. The platform portion surrounds the outer periphery of the recessed portion, and the bottom wall of the recessed portion forms the cavity bottom wall. The cooking utensil includes a partition, which is disposed in the recessed portion and is used to place food. An empty space is formed between the cavity bottom wall and the partition.

10. The cooking utensil according to claim 9, characterized in that, The recess includes a side wall, which is provided along the edge of the cavity bottom wall and has a stepped surface. The partition is supported on the stepped surface.

11. The cooking utensil according to claim 1, characterized in that, The microwave feed inlet includes a second microwave feed inlet, which is formed on the plane of the cavity bottom wall.

12. The cooking utensil according to claim 1, characterized in that, The cavity bottom wall includes four quadrant regions, and each quadrant region is provided with at least one of the first microwave feed inlets.

13. The cooking utensil according to claim 12, characterized in that, The cavity bottom wall includes a first region and a second region. The boundary line between the first region and the second region passes through the center of the cavity bottom wall and is perpendicular to the extension direction of the waveguide channel below the cavity bottom wall. The first region is closer to the microwave generating component than the second region. The cavity bottom wall has five first microwave feed inlets, four of which are distributed in the four quadrants of the cavity bottom wall; the remaining one of the five first microwave feed inlets is located in the area enclosed by the four first microwave feed inlets.

14. The cooking utensil according to any one of claims 1 to 8, characterized in that, The cooking appliance includes a waveguide shell assembly located outside the cooking cavity, and the waveguide shell assembly and the cavity wall together form the waveguide channel.

15. The cooking utensil according to any one of claims 1 to 8, characterized in that, A portion of the cavity sidewall protrudes into the waveguide channel to form one or more second protrusions, and the microwave feed inlet includes a third microwave feed inlet, which is formed in the second protrusion.

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