Electric cooking appliance

Abstract

The utility model discloses a cooking electric appliance. The cooking electric appliance comprises a cavity assembly, the cavity assembly is provided with a cooking cavity, and one side wall, in the first direction, of the cooking cavity comprises a heat insulation side wall; and the heating piece is arranged in the cooking cavity and is close to the heat insulation side wall. In the cooking electric appliance, the heating element is arranged in the cooking cavity and is close to the heat insulation side wall, so that when the heating element works, the heat insulation side wall can isolate heat of the heating element from diffusing towards the outer side of the heat insulation side wall to a certain extent, and the influence of the heat of the heating element on other parts of the cooking electric appliance can be reduced.

Description

Technical Field

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

[0002] In the related art, cooking appliances have a barbecue function. Specifically, a cooking appliance may include a cooking cavity and a heating tube. The heating tube is buried inside a heating cover on the top of the cooking cavity and heats through a mesh plate for protecting the heating tube on the top of the cavity. When the heating tube operates, the cooking appliance can work in the barbecue mode. However, when the heating tube operates, the temperature rise on the top of the cooking cavity is relatively high, thus affecting other components of the cooking appliance. Summary of the Utility Model

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

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

[0005] A cavity assembly, where the cavity assembly is provided with a cooking cavity, and one side wall of the cooking cavity along a first direction includes a heat insulation side wall;

[0006] A heating element, where the heating element is arranged in the cooking cavity and close to the heat insulation side wall.

[0007] In the above cooking appliance, the heating element is arranged in the cooking cavity and close to the heat insulation side wall. Thus, when the heating element works, the heat insulation side wall can, to a certain extent, isolate the heat of the heating element from diffusing outside the heat insulation side wall, which is beneficial to reducing the influence of the heat of the heating element on other components of the cooking appliance.

[0008] In some embodiments, the heating element includes a connecting portion and a heating portion. The connecting portion connects the cavity assembly and the heating portion, and the orthographic projection of the heating portion on the heat insulation side wall along the first direction is located within the area where the heat insulation side wall is located.

[0009] In the above cooking appliance, when the heating element starts to work, the heat insulation side wall can, to a certain extent, isolate the heat generated by the heating portion from diffusing outside the heat insulation side wall, which is beneficial to reducing the influence of a large amount of heat generated by the heating portion on other components of the cooking appliance. It can also, to a certain extent, prevent the temperature rise on the top of the cooking cavity from being relatively high and protect other components of the cooking appliance from being affected.

[0010] In some embodiments, the heat insulation side wall is the top wall of the cooking cavity.

[0011] In the above cooking appliance, the heat-insulating sidewall can separate the heating part from the top of the cooking cavity, preventing the heat in the cooking cavity from being transferred to the top of the cooking cavity during the operation of the cooking appliance, resulting in a relatively high temperature rise, and to a certain extent, preventing other components of the cooking appliance from being thermally damaged.

[0012] In some embodiments, the heating element is directly exposed in the cooking cavity.

[0013] In the above cooking appliance, when the cooking appliance is in the barbecue heating mode, the heating element can radiate heat over a larger range, improving the uniformity of food barbecue in the cooking cavity, and also improving the speed of food barbecue to a certain extent.

[0014] In some embodiments, the cavity assembly includes a cooking cavity, a waveguide, and a heat-insulating member. The cooking cavity is provided with a receiving cavity. An opening is provided on one side of the receiving cavity along the first direction. The waveguide is provided with a microwave output port. The heat-insulating member is disposed at the microwave output port. The waveguide is disposed on the cooking cavity and covers the opening to enclose the receiving cavity to form the cooking cavity. The microwave output port faces the cooking cavity, and the sidewall of the heat-insulating member facing the cooking cavity forms the heat-insulating sidewall.

[0015] In the above cooking appliance, the microwave output by the microwave generating assembly can be fed into the cooking cavity from the top of the cooking cavity through the microwave output port of the waveguide. The microwave can act on the food over a large range, and to a certain extent, the various parts of the food can be heated evenly.

[0016] In some embodiments, the heat-insulating member includes a mica sheet.

[0017] In the above cooking appliance, the heat-insulating member has a low cost and high reliability.

[0018] In some embodiments, the thickness of the mica sheet is greater than or equal to 1 mm and less than or equal to 3 mm.

[0019] In the above cooking appliance, the heat-insulating effect and cost of the mica sheet can meet the requirements.

[0020] In some embodiments, the cooking appliance includes a surface wave generating member and a microwave generating assembly. The waveguide includes an input part and an output part connected to each other. The input part is connected to the microwave generating assembly. The output part is provided with the microwave output port. An accommodating cavity is provided in the output part. The surface wave generating member is disposed in the accommodating cavity, and the surface wave generating member is configured to radiate the microwave output by the microwave generating assembly into the cooking cavity.

[0021] In the above cooking appliance, the surface wave generating component couples the microwaves output by the microwave generating assembly to form more uniform surface waves, making the microwave radiation in the cooking cavity more uniform, so that the food in the cooking cavity can be further heated more evenly.

[0022] In some embodiments, the surface wave generating component includes a surface wave generating plate and a plurality of fins, and the fins extend in the first direction toward the cooking cavity.

[0023] In the above cooking appliance, the surface wave generating component can couple the microwaves output by the microwave generating assembly, and help and guide the microwaves to be converted into the form of surface waves through the structure of the surface wave generating plate and the plurality of fins and propagate uniformly in the cooking cavity, so that the food in the cooking cavity is further heated by uniform microwave radiation.

[0024] In some embodiments, the plurality of fins are arranged in a matrix.

[0025] In the above cooking appliance, since the fins are arranged in a regular matrix, the propagation path of the microwaves in the cooking cavity can be made more uniform, and the heating efficiency of the cooking appliance can be further improved, so that each part of the food is heated more evenly.

[0026] Additional aspects and advantages of the embodiments of the present utility model will be given in part in the following description, will become apparent in part from the following description, or will be understood through the practice of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The above and / or additional aspects and advantages of the present utility model will become apparent and be readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0028] Figure 1 is a schematic structural diagram of the cooking appliance according to the embodiment of the present utility model;

[0029] Figure 2 is an exploded view of the cooking appliance according to the embodiment of the present utility model;

[0030] Figure 3 is a partial schematic structural diagram of the cooking appliance according to the embodiment of the present utility model;

[0031] Figure 4 is another exploded view of the cooking appliance according to the embodiment of the present utility model;

[0032] Figure 5 is another partial schematic structural diagram of the cooking appliance according to the embodiment of the present utility model;

[0033] Figure 6 is still another exploded view of the cooking appliance according to the embodiment of the present utility model;

[0034] Figure 7 is Figure 3 a cross-sectional view of a cooking appliance along line A-A;

[0035] Figure 8 is a schematic structural view of a heating element according to an embodiment of the present invention.

[0036] Description of main component symbols:

[0037] Opening - 10, heat insulation side wall - 12, connecting part - 14, heating element - 16, heating part - 18, heat insulation part - 22, accommodating cavity - 25, waveguide - 35, microwave input port - 36, microwave output port - 38, microwave generating assembly - 40, surface wave generating part - 45, input part - 51, output part - 57, waveguide assembly - 60, accommodating cavity - 63, bracket - 66, surface wave generating plate - 70, fin - 75, cooking cavity - 80, electrical chamber - 90, cooking cavity body - 100, door body - 110, control panel - 120, cavity assembly - 150.

[0038] Cooking appliance - 200. Specific embodiments

[0039] The following details the embodiments of the present invention. Examples of the embodiments 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 embodiments described below with reference to the drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation of the present invention.

[0040] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "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. They are only for the convenience of describing the present invention 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 invention. In the description of the present invention, "a plurality of" means two or more unless otherwise specifically defined.

[0041] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection. It may be a mechanical connection or an electrical connection. It may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components or the interaction relationship between two components. 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.

[0042] In the present utility model, unless otherwise clearly specified and defined, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include that the first and second features are not in direct contact but in contact through other features therebetween. Moreover, the first feature being "above", "over" and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates 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 that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.

[0043] The present disclosure 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. Such 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.

[0044] Please refer to Figures 1 to 7 , a cooking appliance 200 provided by an embodiment of the present utility model includes a cavity assembly 150 and a heating element 16. The cavity assembly 150 is provided with a cooking cavity 80. One side wall of the cooking cavity 80 along a first direction includes a heat insulation side wall 12. The heating element 16 is disposed in the cooking cavity 80 and close to the heat insulation side wall 12.

[0045] In the above cooking appliance 200, the heating element 16 is disposed in the cooking cavity 80 and close to the heat insulation side wall 12. Thus, when the heating element 16 operates, the heat insulation side wall 12 can, to a certain extent, isolate the heat of the heating element 16 from diffusing outside the heat insulation side wall 12, which is beneficial to reducing the influence of the heat of the heating element 16 on other components of the cooking appliance 200.

[0046] Specifically, the cooking appliance 200 refers to various appliances for cooking and preparing food, including but not limited to microwave ovens, microwave grills, microwave steam convection ovens, integrated cooktops, ovens, etc. Optionally, in combination with Figure 1 and Figure 7 , the cooking appliance 200 may be a microwave grill, and the cooking appliance 200 may include a microwave generating component. When the cooking appliance 200 selects the barbecue mode, when the current provided by the power supply passes through the heating element 16, the heating element 16 starts to work based on the principle of resistance heating, converts electrical energy into heat energy, and the generated heat is transferred to the cooking cavity 80 of the cooking appliance 200 by radiation to heat the food in the cooking cavity 80.

[0047] Please combine with Figure 5 , the first direction is the up-down direction, the heat insulation side wall 12 on one side wall of the cooking cavity 80 along the first direction is the upper heat insulation side wall 12, and the heating element 16 is arranged in the cooking cavity 80 and close to the upper heat insulation side wall 12. Optionally, in the embodiment of the present utility model, the heating element 16 includes a metal heating tube. In other embodiments, the heating element 16 may include a quartz tube or a halogen tube, and a metal bracket may be provided to protect the glass tube shell of the quartz tube and the halogen tube.

[0048] In some embodiments, the heating element 16 includes a connecting portion 14 and a heating portion 18. The connecting portion 14 connects the cavity assembly 150 and the heating portion 18, and the orthographic projection of the heating portion 18 on the heat insulation side wall 12 along the first direction is located within the area where the heat insulation side wall 12 is located.

[0049] In this way, when the heating element 16 starts to work, the heat insulation side wall 12 can, to a certain extent, isolate the heat generated by the heating portion 18 from diffusing outward from the heat insulation side wall 12, which is beneficial to reducing the influence of a large amount of heat generated by the heating portion 18 on other components of the cooking appliance 200, and can also, to a certain extent, prevent the temperature rise at the top of the cooking cavity 100 from being too high, protecting other components of the cooking appliance 200 from being affected.

[0050] Specifically, please combine with Figure 5 , the first direction is the up-down direction. The heating element 16 includes a connecting portion 14 and a heating portion 18. The connecting portion 14 connects the cavity assembly 150 and the heating portion 18, so that the heating element 16 can be connected to the cavity assembly 150. Please combine with Figure 5 , the orthographic projection of the heating portion 18 on the heat insulation side wall 12 along the first direction is the orthographic projection of the heating portion 18 from bottom to top on the heat insulation side wall 12, and this orthographic projection is located within the area where the heat insulation side wall 12 is located. In this way, the heat insulation side wall 12 can cover above the heating portion 18, and the heat insulation side wall 12 can, to a certain extent, isolate the heat of the heating element 16 from diffusing upward and outward from the heat insulation side wall 12, preventing a large amount of heat from being transferred to the top of the cooking cavity 100, so as to, to a certain extent, protect other components at the top of the cooking appliance 200 from being affected.

[0051] In some embodiments, the heat-insulating sidewall 12 is the top wall of the cooking cavity 80.

[0052] In this way, the heat-insulating sidewall 12 at the top of the cooking cavity 80 can separate the top of the cooking cavity 100 from the heating part 18, preventing the heat in the cooking cavity 80 from being transferred to the top of the cooking cavity 100 during the operation of the heating element 16, resulting in a relatively high temperature rise, and to a certain extent preventing other components of the cooking appliance 200 from being thermally damaged.

[0053] In some embodiments, the heating element 16 is directly exposed in the cooking cavity 80.

[0054] In this way, when the cooking appliance 200 is in the barbecue heating mode, the heating element 16 can radiate heat over a larger range, improving the uniformity of food heating in the cooking cavity 80, and also improving the food heating speed to a certain extent.

[0055] Specifically, in the related art, the heating elements of cooking appliances usually use quartz tubes, graphene, halogen tubes, etc. However, at this time, a layer of mesh plate needs to be added to protect the glass outer shell of these heating elements. As a result, when the cooking appliance is in the barbecue mode, a large amount of heat generated by the heating element will be attenuated after passing through the mesh plate, the food barbecue speed is slow, and it will cause uneven food heating.

[0056] Please refer to Figure 5 , in the embodiments of the present utility model, the heating element 16 is arranged below the heat-insulating sidewall 12 and is directly exposed in the cooking cavity 80. The heating element 16 located in the cooking cavity 80 has no additional outer shell or shielding, and basically all of the heating element 16 located in the cooking cavity 80 can be seen by the naked eye. This directly exposed design allows the heating element 16 to radiate heat over a larger range, and can directly transfer heat to the food in the cooking cavity 80 for heating, improving the heating efficiency to a certain extent and making the food heating more uniform.

[0057] The heating element 16 is arranged at a position close to the top of the cooking cavity 80 to form an upper heating element, which can prevent stains such as water and grease generated during food heating from splashing onto the heating element 16, resulting in a slow heating efficiency and affecting the working efficiency of the cooking appliance 200. At the same time, this design is also conducive to the cleaning and maintenance of the heating element 16.

[0058] In some embodiments, the cavity assembly 150 includes a cooking cavity 100, a waveguide 35, and a heat insulation member 22. The cooking cavity 150 is provided with a receiving cavity 25. An opening 10 is provided on one side of the receiving cavity 25 along the first direction. The waveguide 35 is provided with a microwave output port 38. The heat insulation member 22 is disposed at the microwave output port 38. The waveguide 35 is disposed on the cooking cavity 100 and covers the opening 10 to enclose the receiving cavity 25 into a cooking cavity 80. The microwave output port 38 faces the cooking cavity 80, and the side wall of the heat insulation member 22 facing the cooking cavity 80 constitutes a heat insulation side wall 12.

[0059] In this way, the microwave output by the microwave generating assembly 40 can be fed into the cooking cavity 80 from the top of the cooking cavity 80 through the microwave output port 38 of the waveguide 35. The microwave can act on the food in a large range, and to a certain extent, the various parts of the food can be heated evenly.

[0060] Specifically, please refer to Figure 2 and Figure 7 , the cooking appliance 200 may be a microwave oven. The cooking appliance 200 includes a power supply and a microwave generating assembly 40. The microwave generating assembly is located in the electrical chamber 90. A part of the waveguide 35 extends into the electrical chamber 90 and is connected to the microwave generating assembly 40 through a waveguide assembly 60. During the operation of the cooking appliance 200 in the microwave heating mode, the power supply supplies high voltage to the microwave generating assembly 40 in the electrical chamber 90. The microwave generating assembly 40 can continuously generate microwaves. The microwaves are transmitted to the cooking cavity 80 through the waveguide 35 in the electrical chamber 90 in sequence to heat the food in the cooking cavity 80.

[0061] Optionally, please refer to Figure 1 and Figure 2 , the cooking appliance 200 includes a door body 110 and a control panel 120. The door body 110 is rotatably connected to the cooking cavity 80. The control panel 120 is disposed on the front side of the electrical chamber 90. The control panel 120 is used to control the operation of the cooking appliance 200.

[0062] In the related art, there are mainly two heating methods for traditional microwave ovens: the flat type and the turntable type. The microwave output port of the waveguide of the flat microwave oven is generally arranged at the bottom of the cooking cavity. When in the microwave heating mode, the microwave output by the microwave generating component is fed into the cooking cavity through the input port at the bottom. Since the flat microwave oven heats the food on the glass plate at the bottom of the cooking cavity, the food is relatively close to the microwave output port of the waveguide. Therefore, the heating area is relatively small, and due to the non-uniformity of microwave radiation, the heating effect of the food is also uneven. The waveguide of the turntable microwave oven is generally arranged on the side or bottom of the cooking cavity. When in the microwave heating mode, the microwave output by the microwave generating component is fed into the cooking cavity from the side or bottom. Since the turntable microwave oven heats the food on the glass turntable at the bottom of the cooking cavity, the distance between the food and the microwave output port of the waveguide will change as the turntable rotates continuously. The uniformity of the food is improved compared to the flat microwave oven, but it is still not ideal. When the microwave output port is arranged on the side or bottom of the cooking cavity, the food is too close to the position of the microwave output port. Due to the microwave traction effect, one end of the food close to the microwave output port is prone to overheating, while the end far from the microwave output port cannot obtain enough microwave radiation for heating, resulting in uneven heating of the food.

[0063] In the embodiment of the present utility model, please refer to Figure 6 and Figure 7 , the waveguide 35 of the cooking appliance 200 is arranged on the cooking cavity 80 and covers the opening 10, and the area of the microwave output port 38 of the waveguide 35 is relatively large, so that microwave can be output to the cooking cavity 80 in a large range, and the food in the cooking cavity 80 can be heated more evenly.

[0064] In Figure 6 , the first direction is the up-and-down direction. One side of the accommodating cavity 25 along the first direction is the upper side of the accommodating cavity. The waveguide 35 is arranged on the top of the accommodating cavity 25 and covers the opening 10, so that the waveguide 35 can close the opening 10 at the top of the cooking cavity 100, and the accommodating cavity 25 closing the opening 10 forms the cooking cavity 80.

[0065] The heat insulation member 22 is arranged outside the microwave output port 38. The heat insulation member 22 is located at the top of the cooking cavity 80, and the side wall of the heat insulation member 22 facing the cooking cavity 80 constitutes the heat insulation side wall 12, so that the heat insulation member 22 can, to a certain extent, isolate the heat of the heating member 16 from radiating towards the top of the cooking cavity 80.

[0066] In some embodiments, the heat insulation member 22 includes mica sheets.

[0067] In this way, the cost of the heat insulation member 22 is low and the reliability is high.

[0068] Specifically, the mica sheet is a thin sheet material made of mica minerals, with good heat insulation properties and is commonly used as a heat insulation material in high-temperature environments. The mica sheet has a low thermal conductivity, so the large amount of heat generated when the heating element 16 works is transferred slowly through the mica sheet, meeting the heat insulation requirements.

[0069] At the same time, the mica sheet can reflect a part of the thermal radiation and absorb a part of the thermal radiation, reducing the heat transfer and improving the heat utilization rate. The mica sheet has a low coefficient of thermal expansion and can maintain a stable structure in the high-temperature environment of the cooking cavity 100, being not easily deformed or damaged. Therefore, it can effectively play a heat insulation role for a long time. Therefore, the mica sheet has a wide application range, low cost, and high reliability.

[0070] The embodiments of the present utility model do not specifically limit the type of the mica sheet. In one example, the type of the mica sheet can be muscovite sheet or phlogopite sheet.

[0071] In some embodiments, the thickness of the mica sheet is greater than or equal to 1 mm (millimeter) and less than or equal to 3 mm.

[0072] In this way, the heat insulation effect and cost of the mica sheet can meet the requirements.

[0073] Specifically, there is a direct relationship between the thickness of the mica sheet and its heat insulation effect. The heat insulation effect of the mica sheet mainly depends on the thermal resistance of the mica sheet, that is, the ability of the mica sheet to impede heat. As the thickness of the mica sheet increases, the path of heat passing through it increases, and the thermal resistance will also increase accordingly, thereby improving the heat insulation effect. At the same time, the mica sheet has a low thermal conductivity, and the time required for heat conduction is prolonged, thereby improving the heat insulation performance. However, the cost of the mica sheet will also increase with the increase in the thickness of the mica sheet. The cost of a thicker mica sheet is higher, and it may increase the overall weight and volume of the cooking appliance 200. Therefore, in practical applications, it is necessary to select an appropriate thickness of the mica sheet according to specific requirements and conditions to achieve the best balance between heat insulation effect and economic benefits. In the embodiments of the present utility model, the thickness of the mica sheet is greater than or equal to 1 mm and less than or equal to 3 mm. The mica sheet within this thickness range can provide a good heat insulation effect, effectively blocking the large amount of heat generated by the heating element 16 from being transferred to the top of the cooking cavity 100, protecting other components of the cooking appliance 200 from heat damage, extending the service life, and also meeting the set requirements in terms of cost.

[0074] In the design of the cooking appliance 200, the penetration requirement of microwaves also needs to be considered. The microwaves output by the microwave generating component 40 can penetrate the mica sheet, thereby heating the food. There is a direct relationship between the effect of microwave penetration and the thickness of the mica sheet. When microwaves pass through the mica sheet, they will be attenuated to a certain extent. The thicker the mica sheet, the greater the obstruction to the microwaves, and thus the greater the difficulty of microwave penetration. In the embodiment of the present utility model, the thickness of the mica sheet is greater than or equal to 1 mm and less than or equal to 3 mm. The mica sheet within this thickness range can provide good microwave transmittance, enabling the microwaves to better pass through the mica sheet and reach the cooking cavity 80 to heat the food, while also having good heat insulation performance and low cost.

[0075] The thickness of the mica sheet is D, where D is greater than or equal to 1 mm and less than or equal to 3 mm, that is, 1 mm ≤ D ≤ 3 mm. In some examples, D = 1 mm, 1.2 mm, 1.5 mm, 2.0 mm, 2.5 mm, 2.7 mm, 3 mm, or other values greater than or equal to 1 mm and less than or equal to 3 mm.

[0076] In certain embodiments, the cooking appliance 200 includes a surface wave generating member 45 and a microwave generating component 40. The waveguide 35 includes an input portion 51 and an output portion 57 that are connected to each other. The input portion 51 is connected to the microwave generating component 40. The output portion 57 is provided with a microwave output port 38. An accommodation cavity 63 is provided within the output portion 57. The surface wave generating member 45 is disposed within the accommodation cavity 63, and the surface wave generating member 45 is configured to radiate the microwaves output by the microwave generating component 40 into the cooking cavity 80.

[0077] In this way, the surface wave generating member 45 couples the microwaves output by the microwave generating component 40 to form a more uniform surface wave, making the microwave radiation within the cooking cavity 80 more uniform, thereby further enabling the food to be heated more evenly.

[0078] Specifically, please refer to Figure 4 and Figure 6 , the first direction is the up-down direction. An opening 10 is provided on the upper side of the accommodation cavity 63. The heat insulation member 22 is installed at the microwave output port 38. The heat insulation member 22 is fixedly connected to the output portion 57 where the waveguide 35 is located. The fixing method includes but is not limited to the bolt method.

[0079] Please refer to Figure 5 and Figure 8 , the connecting portion 14 of the heating member 16 is connected to the cavity assembly 150. A bracket 66 is provided on the heating portion 18. The bracket 66 fixedly connects the heating member 16 to the surface of the heat insulation member 22 facing the cooking cavity 80 by means of bolts. The specific number of the brackets 66 can be specifically defined according to actual needs. In the embodiment of the present utility model, the number of the brackets 66 is 2.

[0080] Optionally, the size of the mica sheet is larger than the size of the opening 10, such that the mica sheet can entirely cover the opening 10. Optionally, the size of the mica sheet is smaller than the size of the opening 10, such that the mica sheet can partially cover the opening 10. Optionally, the size of the mica sheet is equal to the size of the opening 10.

[0081] A channel running through the input part 51 and the output part 57 is provided in the waveguide 35. The accommodation cavity 63 can form a part of the channel, and another part of the channel is provided in the input part 51. Thus, the heat insulation member 22 can shield components such as the waveguide 35 and the surface wave generating assembly 45 disposed in the accommodation cavity 63, and the surface wave generating assembly 45 is directly heated by the heating member 16. The input part 51 is provided with a microwave input port 36, a waveguide assembly 60 is disposed at the microwave input port 36, and the microwave output window of the microwave generating assembly 40 penetrates through the waveguide assembly 60 and extends into the input part 51. Optionally, the microwave generating assembly 40 includes, but is not limited to, a magnetron, a radio frequency module. In Figure 7 the embodiment shown in

[0082] The surface wave generating member 45 is disposed in the accommodation cavity 63. According to a specific structural arrangement and design, the microwave output by the microwave generating assembly 40 and passing through the waveguide 35 is coupled to help guide the microwave to propagate in the cooking cavity 80 in the form of a surface wave. The propagation speed of this surface wave is less than the wave speed in free space, making the microwave radiation in the cooking cavity 80 more uniform, thereby achieving uniform heating of food and improving the heating efficiency and cooking effect.

[0083] In the embodiment of the present utility model, the solution adopted by the cooking appliance 200 to make the microwave radiation more uniform is the surface wave technology. In other embodiments, the cooking appliance 200 can adopt the slot antenna technology or the multi-feed port technology (i.e., at least one feed port is provided on the top and side of the cooking cavity 100).

[0084] In some embodiments, the surface wave generating member 45 includes a surface wave generating plate 70 and a plurality of fins 75, and the fins 75 extend in a first direction towards the cooking cavity 80.

[0085] In this way, the surface wave generating member 45 can couple the microwave output by the microwave generating assembly 40 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 70 and the plurality of fins 75 and propagate uniformly in the cooking cavity 80, so that the food in the cooking cavity 80 is further heated by uniform microwave radiation.

[0086] Specifically, please refer to Figure 4, the first direction is the up-down direction. The fin 75 extends in the first direction toward the cooking cavity 80, and the fin 75 extends downward. The surface wave generating plate 45 and the fin 75 are both in the form of thin sheets, which can ensure that it can effectively guide microwaves to form surface waves. The embodiment of the utility model does not specifically limit the manufacturing process of the surface wave generating element 45. In one example, the surface wave generating element 45 can be integrally manufactured by a stamping process, or manufactured by a bending and welding process.

[0087] In some embodiments, the plurality of fins 75 are arranged in a matrix.

[0088] In this way, since the fins 75 are arranged in a matrix, the propagation path of the microwave in the cooking cavity 80 can be made more uniform, and the heating efficiency of the cooking appliance 200 can be further improved, so that different parts of the food are heated more evenly.

[0089] Specifically, please combine Figure 4 Optionally, in the embodiment of the present invention, the fins 75 near the two sides of the surface wave generating plate 70 are rectangular with notches, and the fins 75 away from the two side edges of the surface wave generating plate 70 are rectangular. In this way, the microwaves can be further guided to form surface waves, so that the microwaves are evenly distributed in the cooking cavity 80. In other embodiments, the shape of the fins 75 can be wavy.

[0090] exist Figure 3 , the second direction is the left-right direction, and the third direction is the front-back direction. The number of columns of the matrix arrangement of the fins 75 along the second direction is n, and the number of columns along the third direction is m. The number of rows m and the number of columns n of the matrix of the fins 75 can be specifically limited according to actual needs, and the embodiment of the utility model does not specifically limit this. In the embodiment of the utility model, the size of the matrix m×n of the fins 75 is 4×8.

[0091] In summary, the cooking appliance 200 of the present invention has at least the following technical solutions:

[0092] (1) The waveguide 35 of the cooking appliance 200 is disposed on the side of the heat insulating member 16 away from the cooking cavity 80, that is, the microwave output port 38 is disposed at the top of the cooking cavity 100. When the cooking appliance 200 is in microwave heating mode, the microwaves generated by the microwave generating assembly 40 are fed into the cooking cavity 80 from the top through the microwave output port 38 of the waveguide 35. The microwaves can act on the food over a large range, and various parts of the food can be heated evenly to a certain extent.

[0093] (2) The heating element 16 is directly exposed in the cooking cavity 80, which allows the heating element 16 to radiate heat over a larger area, directly transfer heat to the food in the cooking cavity 80 for heating, and to a certain extent improve the heating efficiency, further making the food heating more uniform.

[0094] (3) Adding a layer of mica sheet between the heating element 16 and the top of the cooking cavity 100 (the top of the waveguide 35) can not only shield components such as the waveguide 35 and the surface wave generating component 45 disposed in the accommodating cavity 63 from being directly or indirectly touched by the user, but also, as heat insulation, prevent a large amount of heat generated when the heating element 16 operates from being transferred to the top of the cooking cavity 100, and to a certain extent protect other components of the cooking appliance 200 from heat damage.

[0095] The cooking appliance 200 of the present utility model has at least the following technical effects: it can make the cooking appliance 200 more uniform during microwave heating; it has a faster heating speed and more uniform heating during grill heating; the temperature rise at the top of the cooking cavity 100 is lower, and the heat utilization rate is improved.

[0096] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiments or examples are included in at least one embodiment or example of the present utility model. 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.

[0097] Although the embodiments of the present utility model 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 utility model. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present utility model.

Claims

1. A cooking appliance, characterized in that, Comprising: A cavity component, the cavity component is provided with a cooking cavity, and one side wall of the cooking cavity along the first direction includes a heat-insulating side wall; A heating element, the heating element is arranged in the cooking cavity and close to the heat-insulating side wall.

2. The cooking appliance according to claim 1, characterized in that, The heating element includes a connecting portion and a heating portion, the connecting portion connects the cavity component and the heating portion, and the projection of the heating portion on the heat-insulating side wall along the first direction is located within the area where the heat-insulating side wall is located.

3. The cooking appliance according to claim 1, characterized in that, The heat-insulating side wall is the top wall of the cooking cavity.

4. The cooking appliance according to claim 1, characterized in that, The heating element is directly exposed in the cooking cavity.

5. The cooking appliance according to any one of claims 1-4, characterized in that, The cavity component includes a cooking cavity body, a waveguide and a heat-insulating member, the cooking cavity body is provided with a containing cavity, one side of the containing cavity along the first direction is provided with an opening, the waveguide is provided with a microwave output port, the heat-insulating member is arranged at the microwave output port, the waveguide is arranged on the cooking cavity body and covers the opening to enclose the containing cavity into the cooking cavity, the microwave output port faces the cooking cavity, and the side wall of the heat-insulating member facing the cooking cavity constitutes the heat-insulating side wall.

6. The cooking appliance according to claim 5, characterized in that The heat-insulating member includes a mica sheet.

7. The cooking appliance according to claim 6, wherein The thickness of the mica sheet is greater than or equal to 1 mm and less than or equal to 3 mm.

8. The cooking appliance according to claim 5, characterized in that, The cooking appliance includes a surface wave generating member and a microwave generating assembly, the waveguide includes an input portion and an output portion connected to each other, the input portion is connected to the microwave generating assembly, the output portion is provided with the microwave output port, a receiving cavity is arranged in the output portion, the surface wave generating member is arranged in the receiving cavity, and the surface wave generating member is used for radiating the microwave output by the microwave generating assembly into the cooking cavity.

9. The cooking appliance according to claim 8, wherein, The surface wave generating member includes a surface wave generating plate and a plurality of fins, and the fins extend in the direction towards the cooking cavity along the first direction.

10. The cooking appliance according to claim 9, characterized in that, The plurality of fins are arranged in a matrix.

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