Microwave cooking electric appliance

Abstract

The utility model discloses a microwave cooking electric appliance. The microwave cooking electric appliance comprises a cooking cavity, a cooking cavity is formed in the cooking cavity, and an opening is formed in the top of the cooking cavity; the stirring-free microwave assembly comprises a waveguide tube, a microwave source and a plurality of antennas, the waveguide tube is connected with the cooking cavity and the microwave source, the waveguide tube is arranged at the top of the cooking cavity and covers the opening, the waveguide tube is provided with a microwave output cavity, and the antennas are arranged at the microwave output cavity; the turntable assembly comprises a turntable and a motor, the turntable is located at the bottom of the cooking cavity, and the motor is connected with the turntable and used for driving the turntable to rotate. In the microwave cooking electric appliance, on one hand, the plurality of antennas can feed the microwaves transmitted by the waveguide tube into the cooking cavity from the top of the cooking cavity, so that the microwaves can be more dispersedly fed into the cooking cavity, on the other hand, the food materials can be placed on the turntable, and the motor can drive the turntable to drive the food materials to rotate, so that the food materials can be more dispersedly fed into the cooking cavity. Therefore, the condition of poor cooking effect of food materials can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of kitchen appliances, and particularly relates to a microwave cooking appliance. Background Art

[0002] In the related art, a microwave oven can use microwaves to heat food materials in a cooking cavity. When the microwave oven heats food materials, if the microwaves are unevenly distributed in the cooking cavity, the food materials will be unevenly heated, resulting in poor cooking effects. Summary of the Utility Model

[0003] Embodiments of the utility model provide a microwave cooking appliance to solve at least one of the above technical problems.

[0004] A microwave cooking appliance according to an embodiment of the utility model includes:

[0005] A cooking cavity, in which a cooking chamber is provided, and an opening is provided at the top of the cooking chamber;

[0006] A non-stirring microwave assembly, which includes a waveguide, a microwave source, and a plurality of antennas. The waveguide connects the cooking cavity and the microwave source, and is provided at the top of the cooking chamber and covers the opening. The waveguide is provided with a microwave output cavity, and the plurality of antennas are provided in the microwave output cavity;

[0007] A turntable assembly, which includes a turntable and a motor. The turntable is located at the bottom of the cooking chamber, and the motor is connected to the turntable and used to drive the turntable to rotate.

[0008] In the above microwave cooking appliance, on the one hand, the plurality of antennas can feed the microwaves transmitted by the waveguide into the cooking chamber from the top of the cooking chamber, so that the microwaves can be fed into the cooking chamber more dispersedly. On the other hand, the food materials can be placed on the turntable, and the motor can drive the turntable to drive the food materials to rotate, thereby improving the poor cooking effect of the food materials.

[0009] In some embodiments, the microwave cooking appliance includes an electrical chamber provided on one side of the cooking cavity. The waveguide includes an input part and an output part connected to each other. The microwave source is provided in the electrical chamber. The input part is provided in the electrical chamber and connected to the microwave source. The output part is provided at the top of the cooking chamber and covers the opening, and the output part is provided with the microwave output cavity.

[0010] In the above microwave cooking appliance, the microwaves output by the microwave source can be fed into the cooking chamber from the top of the cooking chamber through the microwave output cavity of the waveguide, and the microwaves can act on the food materials in a large range, so that each part of the food materials can be evenly heated to a certain extent.

[0011] In some embodiments, the non-stirring microwave component includes a surface wave generating device disposed in the microwave output cavity, and the surface wave generating device includes the plurality of antennas.

[0012] In the above microwave cooking appliance, the surface wave generating device can couple the microwave output by the microwave source, and form a more uniform surface wave through the guidance of the antennas, so that the microwave radiation in the cooking cavity is more uniform, and thus the food materials can be further heated more uniformly.

[0013] In some embodiments, the surface wave generating device includes a surface wave generating plate and the plurality of antennas, and the antennas extend from the surface wave generating plate towards the cooking cavity.

[0014] In the above microwave cooking appliance, the surface wave generating device can couple the microwave output by the microwave source, and help and guide the microwave to be converted into the form of a surface wave through the structure of the surface wave generating plate and the plurality of antennas and uniformly propagate in the cooking cavity, so that the food materials in the cooking cavity are further heated by uniform microwave radiation.

[0015] In some embodiments, the microwave cooking appliance includes a partition, the microwave output cavity is provided with a microwave output port, and the partition is disposed at the microwave output port to separate the surface wave generating device and the cooking cavity.

[0016] In the above microwave cooking appliance, the microwave output from the microwave output port can penetrate the partition and enter the cooking cavity. The partition can separate the surface wave generating device and the cooking cavity, and at the same time cover the waveguide and the surface wave generating device to prevent the user from directly or indirectly touching the waveguide and the surface wave generating device.

[0017] In some embodiments, the partition is a heat insulation plate.

[0018] In the above microwave cooking appliance, the heat diffusion from the cooking cavity to the top of the cooking cavity can be reduced to a certain extent.

[0019] In some embodiments, the microwave cooking appliance includes an antenna plate, the microwave output cavity is provided with a microwave output port, the antenna plate is disposed at the microwave output port to separate the microwave output cavity and the cooking cavity, and the antenna plate includes the plurality of antennas.

[0020] In the above microwave cooking appliance, the microwave output through the microwave output port can be evenly distributed in the cooking cavity, so that the microwave can act on the food materials in a large range, and the various parts of the food materials can be heated evenly to a certain extent.

[0021] In some embodiments, the antenna includes a slot antenna and / or a feed port antenna.

[0022] In the above microwave cooking appliance, the antenna is easy to form and the cost of the antenna board is low.

[0023] In some embodiments, the cooking cavity includes a bottom plate, the turntable assembly includes a first bracket, the motor includes a main body and an output shaft, the output shaft is connected to the main body, the main body is arranged on the side of the bottom plate away from the cooking cavity, the output shaft is rotatably passed through the bottom plate and connected to the first bracket, and the first bracket is rotatably arranged on the bottom plate and connected to the turntable.

[0024] In the above microwave cooking appliance, the motor can drive the first bracket and the turntable fixed on the first bracket to rotate through the connection between the output shaft and the first bracket, so that the food placed on the turntable moves in the microwave field in the cooking cavity and can be evenly heated by microwave radiation.

[0025] In some embodiments, the bottom plate is provided with a recess, the first bracket is disposed in the recess, and the turntable covers the recess.

[0026] In the above microwave cooking appliance, the cooking cavity can be made tidier.

[0027] Additional aspects and advantages of the embodiments of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be understood through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0029] Figure 1 It is a schematic diagram of the structure of a microwave cooking appliance according to an embodiment of the utility model;

[0030] Figure 2 It is another structural schematic diagram of the microwave cooking appliance according to the embodiment of the utility model;

[0031] Figure 3 It is another structural schematic diagram of the microwave cooking appliance according to the embodiment of the utility model;

[0032] Figure 4 yes Figure 1 A cross-sectional view of a microwave cooking appliance along line AA;

[0033] Figures 5 to 6 It is an exploded view of a microwave cooking appliance according to an embodiment of the utility model.

[0034] Description of main component symbols:

[0035] Opening - 10, waveguide - 13, microwave source - 16, antenna - 19, microwave output cavity - 22, input section - 25, output section - 28, surface wave generating device - 31, surface wave generating plate - 34, partition - 37, microwave output port - 40, depression - 46, bottom plate - 50, turntable - 53, motor - 56, body - 59, output shaft - 62, first bracket - 65, second bracket - 68, positioning projection - 71, positioning hole - 74, rotating support frame - 77, turntable assembly - 80, roller - 83, central shaft sleeve - 86, through hole - 89, non - stirring microwave assembly - 90, turntable support point - 92, electrical chamber - 100, cooking cavity - 150, cooking chamber body - 200, door body - 300, control panel - 350, housing - 400.

[0036] Microwave cooking appliance - 500. Detailed implementation manners

[0037] The following details the implementation manners of the present utility model. Examples of the implementation manners are shown in the drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The implementation manners described below with reference to the drawings are exemplary and are only used to explain the present utility model and should not be construed as a limitation of the present utility model.

[0038] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present utility model. In the description of the present utility model, "a plurality of" means two or more unless otherwise specifically defined.

[0039] In the description of the present utility model, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection. It can be a mechanical connection or an electrical connection. It can be directly connected or indirectly connected through an intermediate medium, and can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0040] In the present utility model, unless otherwise clearly specified and defined, the first feature being "above" or "below" the second feature may include direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through additional features therebetween. Moreover, the first feature being "above", "over" and "on top of" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "under" and "beneath" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the horizontal height of the first feature is less than that of the second feature.

[0041] The disclosure herein provides many different embodiments or examples for implementing different structures of the present utility model. To simplify the disclosure of the present utility model, the components and settings of specific examples are described herein. Of course, they are merely examples and are not intended to limit the present utility model. In addition, the present utility model may repeat reference numerals and / or reference letters in different examples. This repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present utility model provides examples of various specific processes and materials, but those of ordinary skill in the art may be aware of the application of other processes and / or the use of other materials.

[0042] Please refer to Figures 1 to 5 , a microwave cooking appliance 500 provided by an embodiment of the present utility model includes a cooking cavity 200, a non-stirring microwave assembly 90 and a turntable assembly 80. A cooking chamber 150 is provided in the cooking cavity 500, and an opening 10 is provided at the top of the cooking chamber 150; the non-stirring microwave assembly 90 includes a waveguide 13, a microwave source 16 and a plurality of antennas 19. The waveguide 13 connects the cooking cavity 200 and the microwave source 16. The waveguide 13 is provided at the top of the cooking chamber 150 and covers the opening 10. The waveguide 13 is provided with a microwave output cavity 22, and a plurality of antennas 19 are provided at the microwave output cavity 22; the turntable assembly 80 includes a turntable 53 and a motor 56. The turntable 53 is located at the bottom of the cooking chamber 150, and the motor 56 is connected to the turntable 53 and is used to drive the turntable 53 to rotate.

[0043] In the above-mentioned microwave cooking appliance 500, on the one hand, the plurality of antennas 19 can feed the microwave transmitted by the waveguide 13 into the cooking chamber 150 from the top of the cooking chamber 150, so that the microwave can be fed into the cooking chamber 150 more dispersedly. On the other hand, the food ingredients can be placed on the turntable 53, and the motor 56 can drive the turntable 53 to drive the food ingredients to rotate, so as to improve the situation of poor cooking effect of the food ingredients.

[0044] Specifically, the microwave cooking appliance 500 refers to various microwave appliances for cooking and preparing food ingredients, including but not limited to microwave ovens, microwave grills, microwave steam ovens, integrated cooktops, etc. Optionally, please refer to Figure 4 and Figure 5 , the microwave cooking appliance 500 can be a microwave oven. The microwave cooking appliance 500 includes a power supply, a microwave source 16, and an electrical chamber 100. The electrical chamber 100 is located on one side of the cooking cavity 200 (such as Figure 5 the right side in

[0045] ). The microwave source 16 is located in the electrical chamber 100. A part of the waveguide 13 is arranged on the top of the cooking cavity 150 and covers the opening 10. This part is equivalent to the top plate of the cooking cavity 200, and the other part extends into the electrical chamber 100 and is connected to the microwave source 16. During the operation of the microwave cooking appliance 500, the power supply supplies high voltage to the microwave source 16 in the electrical chamber 100. The microwave source 16 can continuously generate microwaves, and the microwaves are transmitted to the cooking cavity 150 through the waveguide 13. The non-stirring microwave component 90 can refer to that the non-stirring microwave component 90 does not adopt rotating parts such as a stirring antenna or a stirring blade to improve the microwave uniformity. The microwaves are then fed into the cooking cavity 200 by multiple antennas 19 in the non-stirring microwave component 90 so that the microwaves are evenly distributed in the cooking cavity 150. The food ingredients are placed on the turntable 53 at the bottom of the cooking cavity 150, and the motor 56 can drive the turntable 53 to drive the food ingredients to rotate in the microwave field, thereby heating the food ingredients in the cooking cavity 150 and improving the cooking effect of the food ingredients. Optionally, please refer to Figure 1 and Figure 2 , the microwave cooking appliance 500 includes a door body 300 and a control panel 350. The door body 300 is rotatably connected to the cooking cavity 200. The control panel 350 is arranged on the front side of the electrical chamber 100, and the control panel 350 is used to control the operation of the microwave cooking appliance 500.

[0046] In the related art, there are mainly two ways to achieve uniform heating in a traditional microwave oven: The first way is to install a rotating antenna or a stirring vane in the cooking cavity of a flat microwave oven. By the rotation of the antenna or the stirring vane and the near-field radiation of the antenna, electromagnetic waves can be radiated or reflected to various positions in the cooking cavity of the microwave oven. The food is placed on the glass plate at the bottom of the cooking cavity for heating. Therefore, uniform heating of the food is achieved by the way that the hot spots rotate around the food. However, in actual applications, the rotation speed and mode of the antenna or the stirrer are not completely uniform, and this way only relies on the relative movement between the food and the hot spots, resulting in non-uniform heating effect of the food. The second way is to install a glass turntable at the bottom of the cooking cavity of a turntable microwave oven. The food is placed on the glass turntable at the bottom of the cooking cavity for heating. The rotation of the glass turntable drives the food to move continuously in the non-uniform electromagnetic field to achieve uniform heating of the food. Compared with the flat microwave oven, the heating uniformity is improved to some extent. However, since this way also only relies on the relative movement between the food and the hot spots, the improvement effect of heating uniformity is limited.

[0047] In the embodiments of the present utility model, please refer to Figure 4 and Figure 5 , a non-stirring microwave component 90 is provided at the top of the cooking cavity 150, and a turntable component 80 is located at the bottom of the cooking cavity 150. During the operation of the microwave cooking appliance 500, the food is placed on the turntable 53 of the turntable component 80. The microwave generated by the microwave source 16 is fed into the cooking cavity 150 through the connected waveguide 13. Multiple antennas 19 can couple the fed microwave to improve the uniform distribution of the microwave in the cooking cavity 150. At the same time, the motor 56 drives the turntable 53 to drive the food to rotate in the microwave field in the cooking cavity 150, thereby further improving the heating uniformity of the food.

[0048] The microwave cooking appliance 500 includes a housing 400, and the housing 400 can cover components such as the cooking cavity 200, the waveguide 13, and the electrical chamber 100 in the rear, left, right, upper, and lower directions.

[0049] In some embodiments, the microwave cooking appliance 500 includes an electrical chamber 100. The electrical chamber 100 is provided on one side of the cooking cavity 200. The waveguide 13 includes an input portion 25 and an output portion 28 connected to each other. The microwave source 16 is provided in the electrical chamber 100. The input portion 25 is provided in the electrical chamber 100 and connected to the microwave source 16. The output portion 28 is provided at the top of the cooking cavity 150 and covers the opening 10. The output portion 28 is provided with a microwave output cavity 22.

[0050] In this way, the microwave output by the microwave source 16 can be fed into the cooking cavity 150 from the top of the cooking cavity 150 through the microwave output cavity 22 of the waveguide 13. The microwave can act on the food ingredients over a large range, and to a certain extent, the various parts of the food ingredients can be heated evenly.

[0051] Specifically, please refer to Figure 3 and Figure 4 , the output part 28 is arranged at the top of the cooking cavity 150 and covers the opening 10. Then the opening 10 is located below the microwave output cavity 22, so that the area of the microwave output cavity 22 provided in the output part 28 is relatively large, and thus the microwave can be output to the cooking cavity 80 over a large range, and the food ingredients in the cooking cavity 80 can be heated more evenly. A channel runs through the input part 25 and the output part 28 in the waveguide 13. The microwave output cavity 22 can form a part of the channel, and the other part of the channel is provided in the input part 25. The input part 25 is arranged in the electrical chamber 100 and is connected to the microwave source 16. The microwave output window of the microwave source 16 can extend into the input part 25. The microwave source 16 includes, but is not limited to, a magnetron and a radio frequency module. In the embodiment shown in Figure 5 , the microwave source 16 is a magnetron.

[0052] In some embodiments, the non-stirring microwave assembly 90 includes a surface wave generating device 31. The surface wave generating device 31 is arranged in the microwave output cavity 22, and the surface wave generating device 31 includes a plurality of antennas 19.

[0053] In this way, the surface wave generating device 31 can couple the microwave output by the microwave source 16, and form a more uniform surface wave through the guidance of the antennas 19, so that the microwave radiation in the cooking cavity 150 is more uniform, and thus the food ingredients can be heated more evenly.

[0054] Specifically, the surface wave generating device 31 is arranged in the microwave output cavity 22. The structure and size of the surface wave generating device 31 are designed according to requirements, and the microwave output by the microwave source 16 and passing through the waveguide 13 is coupled to help and guide the microwave to propagate in the cooking cavity 150 in the form of a surface wave, so that the microwave radiation in the cooking cavity 150 is more uniform, thereby realizing the uniform heating of the food ingredients and improving the heating efficiency and cooking effect.

[0055] In some embodiments, the surface wave generating device 31 includes a surface wave generating plate 34 and a plurality of antennas 19. The antennas 19 extend from the surface wave generating plate 34 towards the cooking cavity 150.

[0056] In this way, the surface wave generating device 31 can couple the microwave output by the microwave source 16, assist and guide the microwave to be converted into the form of surface waves through the structure of the surface wave generating plate 34 and the plurality of antennas 19 and uniformly propagate in the cooking cavity 150, so that the food materials in the cooking cavity 150 are further heated by uniform microwave radiation.

[0057] Specifically, please refer to Figure 5 . The direction from the surface wave generating plate 34 towards the cooking cavity 150 is the downward direction. The antennas 19 extend downward from the surface wave generating plate 34, so that the microwave can be fed into the cooking cavity from the top of the cooking cavity 150 downward. Both the surface wave generating plate 34 and the antennas 19 are in the shape of thin sheets, which can ensure that it can effectively guide the microwave to form surface waves. The manufacturing process of the surface wave generating device 31 in the embodiment of the present utility model is not specifically limited. In one example, the surface wave generating device 31 can be integrally manufactured by a stamping process or manufactured by a bending and welding process.

[0058] In the embodiment of the present utility model, please refer to Figure 5 . The plurality of antennas 19 are arranged in a matrix, so that the propagation path of the microwave in the cooking cavity 150 is more uniform, which can further improve the heating uniformity of the microwave cooking appliance 500, so that each part of the food material is heated more uniformly. Optionally, in Figure 5 , the antennas 19 are in the shape of a rounded rectangle, which can further guide the microwave to form surface waves and make the microwave uniformly distributed in the cooking cavity 150. In other embodiments, the shape of the antennas 19 can be wavy.

[0059] Set the number of antennas 19 arranged in the matrix along the left-right direction to be n, and the number of antennas 19 arranged in the matrix along the front-back direction to be m. The m and n of the antenna matrix can be specifically limited according to actual needs, and the embodiment of the present utility model does not specifically limit this. In the embodiment of the present utility model, the size of the antenna matrix m×n of the antennas 19 is 2×5. The spacing between the antennas 19 can be specifically limited according to actual needs, and the present utility model does not specifically limit this.

[0060] Optionally, the sizes of the antennas 19 arranged along the front-back direction are the same, and the sizes of the antennas 19 arranged along the left-right direction increase sequentially from right to left, which can optimize the process of guiding the microwave to form surface waves and further make the microwave uniformly distributed in the cooking cavity 150. In other embodiments, the sizes of each antenna 19 can be equal. The sizes of the antennas 19 can be specifically limited according to actual needs, and the present utility model does not specifically limit this.

[0061] In some embodiments, the microwave cooking appliance 500 includes a partition 37. A microwave output port 40 is provided in the microwave output cavity 22, and the partition 37 is disposed at the microwave output port 40 to separate the surface wave generating device 31 and the cooking cavity 150.

[0062] In this way, the microwave output from the microwave output port 40 can penetrate the partition 37 and enter the cooking cavity 150. The partition 37 can separate the surface wave generating device 31 and the cooking cavity 150, and at the same time cover the waveguide 13 and the surface wave generating device 31 to prevent the user from directly or indirectly touching the waveguide 13 and the surface wave generating device 31.

[0063] Specifically, when the microwave cooking appliance 500 operates, the microwave generated by the microwave source 16 is transmitted from the input part 25 to the microwave output cavity of the output part 28. After the uniform microwave action of the antenna 19, the microwave penetrates the partition 37 from the microwave output port 40 and enters the cooking cavity 150. In Figure 3 this embodiment, the output part 28 is disposed at the top of the cooking cavity 150 and covers the opening 10. The top plate of the output part 28 can be equivalent to the top plate of the cooking cavity body 200. The output part 28 is provided with a microwave output cavity 22, and the microwave output cavity 22 is provided with a microwave output port 40. The partition 37 is disposed at the microwave output port 40 and covers the opening 10. Thus, the partition 37 can close the opening 10 in the upper part of the cooking cavity body 200 to form the cooking cavity 150. The partition 37 and the output part 28 are fixedly connected, and the fixing methods include but are not limited to the bolt method. The partition includes but is not limited to non-metallic materials such as glass.

[0064] In some embodiments, the partition 37 is a heat insulation plate.

[0065] In this way, the heat in the cooking cavity 150 can be reduced from diffusing to the top of the cooking cavity body 200 to a certain extent.

[0066] In one example, the heat insulation plate can be a microwave-penetrable heat insulation plate such as a mica sheet. In Figure 4 this embodiment, the surface wave generating device 31 is disposed in the microwave output cavity 22, and the partition 37 is made of a mica sheet. The mica sheet allows microwave energy to pass through without absorbing or reflecting microwaves and hindering the propagation of microwaves. Therefore, the microwave can penetrate the mica sheet. The thickness of the partition 37 can be specifically defined according to actual needs, and the present utility model does not make specific limitations on this.

[0067] When the microwave cooking appliance 500 operates, the microwave is fed into the cooking cavity 150 from the top of the cooking cavity 150. The setting of the heat insulation plate can reduce the heat in the cooking cavity 150 from diffusing to the top of the cooking cavity body 200 to a certain extent, which is beneficial to reducing the temperature rise of the waveguide 13, the antenna 19, and other electrical components at the top of the cooking cavity body 200, thereby ensuring the working efficiency and service life of the microwave cooking appliance 500.

[0068] In some embodiments, the microwave cooking appliance 500 includes an antenna board. The microwave output cavity 22 is provided with a microwave output port 40. The antenna board is disposed at the microwave output port 40 to separate the microwave output cavity 22 and the cooking cavity 150. The antenna board 34 includes a plurality of antennas 19.

[0069] In this way, the microwaves output through the microwave output port 40 can be evenly distributed in the cooking cavity 150, so that the microwaves can act on the food materials in a large range, and to a certain extent, the various parts of the food materials can be evenly heated.

[0070] Specifically, please refer to Figure 3 , the antenna board is located at the microwave output port 40 of the waveguide 13. The antenna board is disposed at the microwave output port 40 to separate the microwave output cavity 22 and the cooking cavity 150. The antenna board can serve as the top wall board of the cooking cavity 150. The antenna board is fixedly connected to the output part 28, and the fixing methods include but are not limited to the bolt method. The antenna board is adapted to the microwave output port 40, and the size of the antenna board can be determined according to the size of the microwave output port 40.

[0071] In some embodiments, the antenna 19 includes a slot antenna and / or a feed port antenna.

[0072] In this way, the antenna 19 is easy to form, and the cost of the antenna board is low.

[0073] Specifically, the slot antenna is an antenna with slots opened on the surface of the antenna board. Microwaves can enter the cooking cavity 150 through these slots. These slots can help guide the uniform distribution of microwaves, and to a certain extent, the various parts of the food materials can be evenly heated. The size, quantity and arrangement of the slots can be specifically defined according to actual needs, and the present utility model does not make specific limitations thereto.

[0074] Similarly, the feed port antenna is an antenna with feed ports opened on the surface of the antenna board. Microwaves can enter the cooking cavity 150 through these feed ports. These feed ports can help guide the uniform distribution of microwaves, and to a certain extent, improve the uniformity of food material heating. The size, quantity and arrangement of the feed ports can be specifically defined according to actual needs, and the present utility model does not make specific limitations thereto.

[0075] In one embodiment, the antenna 19 includes a slot antenna and a feed port antenna. In one embodiment, the antenna 19 includes a slot antenna or a feed port antenna.

[0076] Generally, the size of the feed port is larger than that of the slot, because the feed port antenna requires sufficient space to ensure efficient transmission of microwave energy, while the slot antenna pays more attention to the propagation direction and mode of microwaves. The type of the antenna can be specifically defined according to actual needs.

[0077] When manufacturing the antenna board, a metal material can be used to form the antenna board and multiple antennas 19 through a stamping process. Therefore, the antennas 19 are easy to form and the cost of the antenna board is low.

[0078] In some embodiments, the cooking cavity 200 includes a bottom plate 50. The turntable assembly 80 includes a first bracket 65. The motor 56 includes a body 59 and an output shaft 62. The output shaft 62 is connected to the body 59. The body 59 is disposed on a side of the bottom plate 50 facing away from the cooking cavity 150. The output shaft 62 rotatably penetrates the bottom plate 50 and is connected to the first bracket 65. The first bracket 65 is rotatably disposed on the bottom plate 50 and is connected to the turntable 53.

[0079] In this way, the motor 56 can drive the first bracket 65 and the turntable 53 fixed on the first bracket 65 to rotate through the connection between the output shaft 62 and the first bracket 65, so that the food placed on the turntable 53 moves in the microwave field in the cooking cavity 150 and can be evenly heated by microwave radiation.

[0080] Specifically, a positioning protrusion 71 is provided on one of the turntable 53 and the first bracket 65, and a positioning hole 74 is provided on the other. The positioning protrusion 71 can be stuck in the positioning hole 74, so that the turntable 53 is connected to the first bracket 65. The positioning protrusion 71 and the positioning hole 74 mainly limit the relative rotation between the turntable 53 and the first bracket 65 by the positioning protrusion 71 being stuck in the positioning hole 74, so that the turntable 53 can rotate with the rotation of the first bracket 65. The first bracket 65 can provide a supporting function for the turntable 53 to ensure that the turntable 53 can be stably placed inside the cooking cavity 150. It can be understood that for the convenience of cleaning the turntable 53, the turntable 53 can be detachably placed on the first bracket 65.

[0081] Optionally, in Figure 6 , the positioning protrusion 71 is provided at the bottom of the turntable 53, and the positioning hole 74 is provided in the middle of the first bracket 65. In other embodiments, the positioning protrusion 71 can be provided in the middle of the first bracket 65, and the positioning hole 74 can be provided at the bottom of the turntable 53. The positions and distances of the positioning protrusion 71 and the positioning hole 74 can be specifically defined according to actual needs, and the present invention does not make specific limitations on this.

[0082] The present invention does not make specific limitations on the number of the positioning protrusion 71 and the positioning hole 74. In Figure 6 , the number of both the positioning protrusion 71 and the positioning hole 74 is 3, and one positioning protrusion 71 corresponds to being stuck in one positioning hole 74.

[0083] In Figure 6, a plurality of turntable support points 92 are provided at the bottom edge of the turntable 53 to ensure that the turntable 53 is more stable on the first support 65 and prevent the turntable 53 from sliding or tilting during rotation. The present utility model does not specifically limit the number of the turntable support points 92. Optionally, the number of the turntable support points 92 is 3. The present utility model does not specifically limit the material of the turntable 53. In one example, the material of the turntable 53 can be heat-resistant glass, heat-resistant plastic or ceramic.

[0084] Optionally, in Figure 6 , the first support 65 further includes a rotating support frame 77 and rollers 83. The rotating support frames 77 are formed by extending at intervals of 120° with the center of the first support 65 as a reference. The rollers 83 are rotatably installed at the ends of the rotating support frames 77, and one rotating support frame 77 corresponds to one roller 83 installed thereon. The output shaft 62 of the motor 56 rotatably passes through the bottom plate 50 and is connected to the first support 65. A central shaft sleeve 86 is provided in the middle of the first support 65, and the output shaft 62 is directly connected to the central shaft sleeve 86. During the operation of the microwave cooking appliance 500, the power supply in the electrical chamber 100 transmits current to the motor 56 connected to the power supply, causing the motor 56 to start rotating. The rotational power of the motor 56 is transmitted to the turntable support 65 through the output shaft 62, thereby driving the turntable support 65 and the turntable 53 installed on the turntable support 65 to rotate together. The rollers 83 on the turntable support 65 roll on the bottom of the turntable 53 to help the turntable 53 rotate smoothly. In summary, the motor 56 can drive the first support 65 and the turntable 53 fixed on the first support 65 to rotate through the connection between the output shaft 62 and the first support 65, ensuring that the food ingredients on the turntable 53 can move evenly inside the cooking cavity 150, so that all parts of the food ingredients are heated evenly to a certain extent. The turntable support points 92 can be provided on the rotating support frames 77 in a one-to-one correspondence.

[0085] In some embodiments, the bottom plate 50 is provided with a recess 46, the first support 65 is provided in the recess 46, and the turntable 53 covers the recess 46.

[0086] In this way, the interior of the cooking cavity 150 can be made cleaner.

[0087] Specifically, please refer to Figure 2 and Figure 5 , the rotation of the turntable support 65 is transmitted to the turntable 53 through the rollers 83. The rollers 83 roll at the recess 46 and on the bottom of the turntable 53, which can help the turntable 53 rotate smoothly, drive the food ingredients on the turntable 53 to rotate evenly in the cooking cavity 150, and to a certain extent, make all parts of the food ingredients receive uniform heat.

[0088] The first bracket 65 is disposed in the recess 46, which can make the bottom of the cooking cavity 150 flatter; the turntable 53 covers the recess 46 so that the juice of the ingredients on the turntable 53 will not or is not easily dripped into the recess 46, thereby making the cooking cavity 150 cleaner.

[0089] The turntable assembly 80 includes a second bracket 68. The second bracket 68 is installed on the side of the bottom plate 50 away from the bottom plate 50. The body 59 is installed on the second bracket 68, and the output shaft 62 rotatably penetrates through the second bracket 68. Thus, the second bracket 68 can help fix the motor 56, prevent the motor 56 from moving or vibrating when the microwave cooking appliance 500 is working, contribute to extending the service life of the motor 56, and ensure the working efficiency of the microwave cooking appliance 500.

[0090] Please refer to Figure 5 and Figure 6 , the body 59 of the motor 56 is disposed in a recessed area on the surface of the second bracket 68 facing the motor 56 in the first direction. The shape profile of the recessed area closely fits the shape profile of the body 59, and the recessed area provides a stable support for the motor 56. At the same time, a through hole 89 is provided in the recessed area, so that the output shaft 62 can rotatably penetrate through the through hole 89 and then be connected to the first bracket 65. The second bracket 68 can help fix the motor 56, to a certain extent ensuring the stability of the placement of the motor 56 and avoiding unnecessary shaking or movement.

[0091] In the description of this specification, the descriptions with reference to terms such as "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples" or "some examples" etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0092] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A microwave cooking appliance, characterized in that: include: A cooking cavity, wherein a cooking cavity is provided in the cooking cavity, and an opening is provided at the top of the cooking cavity; A non-stirring microwave assembly, the non-stirring microwave assembly comprising a waveguide, a microwave source and a plurality of antennas, the waveguide connecting the cooking cavity and the microwave source, the waveguide being arranged at the top of the cooking cavity and covering the opening, the waveguide being provided with a microwave output cavity, the plurality of antennas being arranged in the microwave output cavity; The turntable assembly comprises a turntable and a motor. The turntable is located at the bottom of the cooking cavity. The motor is connected to the turntable and is used to drive the turntable to rotate.

2. The microwave cooking appliance according to claim 1, characterized in that: The microwave cooking appliance comprises an electrical chamber, wherein the electrical chamber is arranged at one side of the cooking cavity, the waveguide comprises an input part and an output part connected to each other, the microwave source is arranged in the electrical chamber, the input part is arranged in the electrical chamber and connected to the microwave source, the output part is arranged at the top of the cooking cavity and covers the opening, and the output part is provided with the microwave output cavity.

3. The microwave cooking appliance according to claim 1, characterized in that: The non-stirring microwave assembly includes a surface wave generating device, which is disposed in the microwave output cavity and includes the plurality of antennas.

4. The microwave cooking appliance according to claim 3, characterized in that: The surface wave generating device includes a surface wave generating plate and the plurality of antennas, wherein the antennas extend from the surface wave generating plate toward the cooking cavity.

5. The microwave cooking appliance according to claim 3, characterized in that: The microwave cooking appliance comprises a partition, the microwave output cavity is provided with a microwave output port, and the partition is arranged at the microwave output port to separate the surface wave generating device and the cooking cavity.

6. The microwave cooking appliance according to claim 5, characterized in that: The partition is a heat insulation board.

7. The microwave cooking appliance according to claim 1, characterized in that: The microwave cooking appliance comprises an antenna board. The microwave output cavity is provided with a microwave output port. The antenna board is arranged at the microwave output port to separate the microwave output cavity and the cooking cavity. The antenna board comprises the plurality of antennas.

8. The microwave cooking appliance according to claim 7, characterized in that: The antenna includes a slot antenna and / or a feed antenna.

9. The microwave cooking appliance according to claim 1, characterized in that: The cooking cavity includes a bottom plate, the turntable assembly includes a first bracket, the motor includes a body and an output shaft, the output shaft is connected to the body, the body is arranged on a side of the bottom plate away from the cooking cavity, the output shaft is rotatably passed through the bottom plate and connected to the first bracket, and the first bracket is rotatably arranged on the bottom plate and connected to the turntable.

10. The microwave cooking appliance according to claim 9, characterized in that: The bottom plate is provided with a recess, the first bracket is arranged in the recess, and the rotating disk covers the recess.

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