Cooking apparatus

Abstract

The application provides a cooking device, and relates to the technical field of non-electric appliances. The cooking device comprises an inner container, a heating pipe microwave shielding net and a microwave shielding plate. The side wall of the inner container is provided with a mounting hole. The heating pipe is provided with a connecting terminal. The connecting terminal extends out of the inner container from the mounting hole and is in sealed connection with the mounting hole. The microwave shielding net and the microwave shielding plate are both located outside the inner container. The microwave shielding net is deformed through the microwave shielding plate and is tightly attached to the outer wall surface of the inner container. The connecting terminal sequentially penetrates through the microwave shielding net and the microwave shielding plate. The microwave shielding net and the microwave shielding plate are jointly configured to prevent the microwave in the cooking cavity from leaking through the mounting hole, so that the microwave at the mounting hole is doubly shielded, and the safety and reliability of the cooking device are improved.

Description

Technical Field

[0001] This application relates to the field of kitchen appliance technology, and more particularly to a cooking device. Background Technology

[0002] A microwave-steam-grill combo is a kitchen appliance that combines microwave, steam, and baking functions. Its inner pot is usually made of stainless steel or enamel. Enameled inner pots are widely used due to their smooth surface, corrosion resistance, and ease of cleaning.

[0003] In related technologies, microwave-steam-grill combos are usually equipped with heating tubes with multiple sets of parallel connection terminals. Several mounting holes are opened in the top area of ​​the inner cavity side wall. After each connection terminal passes through the corresponding hole, it is fixedly connected to the inner cavity by fasteners. In addition, in order to prevent steam leakage, a sealing gasket is often installed between the fasteners and the outer wall of the inner cavity to enhance the sealing performance.

[0004] However, in the existing technology, the microwave shielding effect at the heating tube mounting hole is not good, and the microwave leakage problem seriously affects the safety and operational reliability of the whole machine. Utility Model Content

[0005] In view of the above problems, this application provides a cooking device to solve the technical problem of poor microwave shielding effect at the heating tube mounting hole of existing microwave-steam-grill combination appliances.

[0006] To achieve the above objectives, the embodiments of this application provide the following technical solutions:

[0007] This application provides a cooking device, including an inner pot and a heating tube. The inner pot has a cooking cavity inside, and a mounting hole is provided on the side wall of the inner pot. The heating tube is disposed in the cooking cavity and has a connecting terminal. The connecting terminal extends out of the mounting hole from the outside of the inner pot and is sealed to the mounting hole.

[0008] The cooking equipment also includes a microwave shielding mesh and a microwave shielding plate, both located outside the inner pot. The microwave shielding mesh is sandwiched between the outer wall of the inner pot and the microwave shielding plate. The microwave shielding plate presses the microwave shielding mesh towards the inner pot, causing the microwave shielding mesh to deform and fit tightly against the outer wall of the inner pot. The connecting terminal passes through the microwave shielding mesh and the microwave shielding plate in sequence. The microwave shielding mesh and the microwave shielding plate are configured to jointly prevent microwave leakage from the cooking cavity through the mounting hole.

[0009] The cooking equipment provided in this application, through a sealed connection between the connecting terminal and the mounting hole, can prevent steam inside the inner pot from leaking out of the inner pot through the connection terminal and the mounting hole. By placing a microwave shielding mesh and a microwave shielding plate outside the inner pot, with the microwave shielding mesh pressed tightly against the outer wall of the inner pot by the microwave shielding plate and closely fitting the outer wall of the inner pot, and the connecting terminal passing through the microwave shielding mesh and the microwave shielding plate in sequence, when microwaves leak outward along the surface of the connecting terminal through the mounting hole, they can be doubly shielded by the microwave shielding mesh and the microwave shielding plate, thereby improving the safety and reliability of the cooking equipment.

[0010] In some embodiments, the circumferential edge of the microwave shielding plate is provided with a microwave shielding structure, and the wave impedance of the microwave shielding structure is mismatched with the air wave impedance.

[0011] In this way, when microwaves escaping from the circumferential edge of the microwave shielding plate reach the microwave shielding structure and attempt to propagate towards the air, the wave impedance of the microwave shielding structure is mismatched with the wave impedance of the air. This causes the microwaves to be reflected and concentrated towards the center of the microwave shielding plate, thereby changing the direction of microwave propagation. This prevents microwaves from leaking from the edge of the microwave shielding plate and improves the reliability of microwave shielding at the mounting holes.

[0012] In some embodiments, the edge of the microwave shielding plate is provided with a plurality of tooth-shaped structures arranged sequentially and spaced apart along the circumference, and the plurality of tooth-shaped structures form the microwave shielding structure.

[0013] In this way, the spaced tooth-shaped structure forms a region with varying wave impedance, which further mismatches the wave impedance of the microwave shielding structure with that of air, thereby improving the microwave shielding capability at the edge of the microwave shielding plate.

[0014] In some embodiments, the gap between adjacent toothed structures is 0.1 mm to 7.6 mm.

[0015] In this way, the gap between adjacent tooth-shaped structures is less than a quarter wavelength of microwave. When the microwave passes through the gap between adjacent tooth-shaped structures, the wavelength and the gap size do not match, thus forcibly cutting off the microwave and causing energy attenuation, thereby preventing microwave leakage.

[0016] In some embodiments, the microwave shielding plate has a groove on the side facing the inner liner, and a plurality of toothed structures are arranged sequentially at intervals along the circumferential edge of the groove, and each toothed structure extends at least from the edge of the groove toward the center of the groove.

[0017] In this way, microwaves leaking from the mounting hole along the connection terminal can enter the groove on the microwave shielding plate. Since the toothed structure extends from the edge of the groove towards the center of the groove, the toothed structure reflects the microwaves towards the center of the groove, further reducing the risk of microwave leakage.

[0018] In some embodiments, each of the toothed structures includes a first tooth and a second tooth. A first end of the first tooth is connected to the edge of the groove, and a second end of the first tooth extends toward the center of the groove. A first end of the second tooth is connected to the second end of the first tooth and is set at an angle to the first tooth. The second end of the second tooth extends toward the bottom wall of the groove, and there is a gap between the end of the second end of the second tooth and the bottom wall of the groove, so that the cross-section of the toothed structure is G-shaped overall.

[0019] In this way, microwaves can be reflected by the first and second teeth respectively, causing the microwave energy to be consumed rapidly and further reducing the risk of microwave leakage from the edge of the microwave shielding plate.

[0020] In some embodiments, the bottom wall of the groove has a boss extending toward the inner liner, and the microwave shielding mesh is sandwiched between the boss and the outer wall surface of the inner liner.

[0021] In this way, on the one hand, since the area of ​​the protrusion is smaller than that of the microwave shielding plate, the protrusion can cause the microwave shielding mesh to deform sufficiently, so as to better fit tightly against the outer wall of the inner liner. On the other hand, the protrusion can reduce the flatness requirements of the entire microwave shielding plate. Furthermore, the protrusion can form the first layer of barrier against microwaves, and the toothed structure can form the second layer of barrier against microwaves, thus achieving multiple layers of microwave shielding on the microwave shielding plate and improving the microwave shielding effect.

[0022] In some embodiments, the gap between the first tooth and the outer wall surface of the inner liner is less than 1 mm; and / or

[0023] The microwave shielding mesh is a metal wire mesh; the microwave shielding plate is a metal plate.

[0024] In this way, the metal wire mesh can deform under the pressure of the microwave shielding plate, so that the metal wire mesh can fit tightly against the wall of the inner liner, improving the performance of preventing microwave leakage. In addition, using metal wire mesh as microwave shielding mesh and metal plate as microwave shielding plate can form a conductive surface on the microwave shielding mesh and microwave shielding plate, so that microwaves will be reflected on this surface, thus giving the microwave shielding mesh and microwave shielding plate excellent shielding performance.

[0025] In some embodiments, the cooking device further includes a sealing gasket, which is sleeved on the connecting terminal and sandwiched between the microwave shielding mesh and the microwave shielding plate, and is used to seal the gap between the connecting terminal and the mounting hole.

[0026] In this way, the sealing gasket increases the airtightness of the inner liner, preventing steam from escaping into the air through the gap between the mounting hole and the connection terminal. This gives the mounting hole a dual protection function of microwave shielding and airtightness. At the same time, the sealing gasket is elastic, which can absorb and buffer the installation pressure between the microwave shielding mesh and the microwave shielding plate, as well as the stress caused by thermal expansion and contraction, allowing the microwave shielding mesh to maintain its shielding performance for a longer period of time.

[0027] In some embodiments, the sealing gasket has a sealing sleeve extending along the extension direction of the connecting terminal, the microwave shielding plate has a through hole through which the connecting terminal passes, and the sealing sleeve is located between the peripheral wall of the connecting terminal and the wall of the through hole; and / or,

[0028] The cooking device also includes fasteners, the microwave shielding plate having a recessed area on the side opposite to the inner pot, the fasteners being configured to connect the microwave shielding plate to the connection terminal, and at least a portion of the structure of the fasteners being accommodated within the recessed area.

[0029] In this way, the sealing sleeve can extend into the through hole, thereby achieving a seal between the periphery of the connecting terminal and the wall of the through hole, preventing steam from escaping from the gap between the connecting terminal and the through hole. The recessed area on the microwave shielding plate allows the fasteners to be hidden within the recessed area, thereby reducing the length of the fasteners extending beyond the shielding plate on the side away from the inner pot, and thus making the entire cooking device more compact in the axial direction of the connecting terminal.

[0030] In addition to the technical problems solved by the embodiments of this application, the technical features constituting the technical solutions, and the beneficial effects brought about by the technical features of these technical solutions described above, other technical problems that can be solved by the cooking equipment provided by the embodiments of this application, other technical features included in the technical solutions, and the beneficial effects brought about by these technical features will be further explained in detail in the specific implementation. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 This is a cross-sectional structural diagram of the cooking equipment provided in the embodiments of this application;

[0033] Figure 2 for Figure 1 A magnified view of a section at point A in the middle;

[0034] Figure 3 for Figure 1 Schematic diagram of the exploded structure at point A;

[0035] Figure 4 A front view of a microwave shielding plate provided in an embodiment of this application;

[0036] Figure 5 for Figure 4 Schematic diagram of the cross-sectional structure at point BB;

[0037] Figure 6 This is a three-dimensional structural diagram of the microwave shielding plate provided in the embodiments of this application.

[0038] Explanation of reference numerals in the attached figures:

[0039] 100 - Inner liner; 110 - Mounting hole;

[0040] 200 - Heating element; 210 - Connecting terminal;

[0041] 300-microwave shielding mesh;

[0042] 400 - Microwave shielding plate; 410 - Microwave shielding structure; 411 - Toothed structure; 4111 - First tooth; 4112 - Second tooth; 420 - Groove; 421 - Boss; 430 - Through hole; 440 - Recessed area;

[0043] 500 - Sealing gasket; 510 - Sealing sleeve;

[0044] 600 - Fasteners. Detailed Implementation

[0045] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0046] This application provides a cooking device, which includes, but is not limited to, a microwave-steam-grill combination appliance, a microwave-grill combination appliance, and a microwave-steam combination appliance.

[0047] Taking a microwave-steam-grill combination oven as an example, this type of oven features microwave, steam, and baking functions. The microwave function generates microwaves within the inner cavity to cook food, the steam function generates steam within the inner cavity to cook food, and the baking function uses a heating element to cook the food. The heating element needs to be connected to a power supply device outside the inner cavity. Therefore, the heating element's terminals need to pass through a mounting hole to connect to the external functional device. Currently, a sealing gasket is used at this mounting hole to prevent steam leakage. However, the sealing gasket's shielding effect on microwaves is poor. When the microwave function is used, microwaves can easily travel along the surface of the heating element through the mounting hole and leak outside the inner cavity. The area outside the inner cavity corresponding to the mounting hole usually houses electronic components that enable the different functions of the microwave-steam-grill combination oven. Leaking microwaves can affect the normal functioning of these electronic components, thus impacting the safety and reliable operation of the entire appliance.

[0048] To overcome the deficiencies in the prior art, this application provides a cooking device that adds a double microwave shielding structure of "microwave shielding mesh + microwave shielding plate" to the outer side of the inner pot and at the sealed connection between the connecting terminal and the mounting hole. The microwave shielding plate's pressing action causes the microwave shielding mesh to deform and fit tightly against the outer wall of the inner pot. With the synergistic effect of the double shielding, the leakage path of microwaves in the cooking cavity through the mounting hole and connecting terminal is further blocked, thereby improving the microwave shielding sealing performance of the device.

[0049] The contents of this application will now be described in detail with reference to the accompanying drawings, so that those skilled in the art can more clearly and thoroughly understand the contents of this application. For ease of understanding, in this embodiment, the front-to-back direction of the cooking device is marked as the Y direction, and the height direction is marked as the Z direction.

[0050] like Figure 1 and Figure 2As shown, this application provides a cooking device, which includes, but is not limited to, a microwave-steam-grill combination appliance. Taking a microwave-steam-grill combination appliance as an example, the cooking device includes an inner pot 100 and a heating element 200. The inner pot 100 has a cooking cavity inside, which is used to place food and to cook the food within the cooking cavity. The cooking methods include, but are not limited to, microwave cooking, steam cooking, and baking cooking. The cooking cavity has an opening (not shown in the figure), and a door is provided at the opening of the cooking cavity to open or close the opening of the cooking cavity. The inner pot 100 has a mounting hole 110 on its side wall. In this embodiment, the mounting hole 110 is located on the rear side wall of the inner pot 100. Of course, in other embodiments, the mounting hole 110 may also be located on the top side wall, the left side wall, or the right side wall of the inner pot 100. This application does not specifically limit this. A heating element 200 is disposed inside the cooking cavity. The heating element 200 has a connection terminal 210, which extends from the mounting hole 110 to the outside of the inner pot 100 to connect to an external power supply device, such as a power source, so that the heating element 200 can generate heat to cook the food. The connection terminal 210 is sealed to the mounting hole 110, which prevents steam inside the inner pot 100 from escaping to the outside of the inner pot 100 through the gap between the connection terminal 210 and the mounting hole 110.

[0051] Because the microwave oven has a microwave cooking function, microwaves are generated inside the inner cavity 100 when the microwave cooking function is activated. Some of these microwaves travel along the heating element 200 and the connection terminal 210, and reach the outside of the inner cavity 100 through the mounting hole 110, affecting the normal operation of other electronic components located near the mounting hole 110. Therefore, to prevent microwave leakage, the cooking device provided in this application also includes a microwave shielding mesh 300 and a microwave shielding plate 400. It is understood that both the microwave shielding plate 400 and the microwave shielding mesh 300 are made of materials with high electrical conductivity, so that a large number of free electrons exist inside them. Specifically, they can be made of a metal with high electrical conductivity or a combination of metal and non-metal fibers with high electrical conductivity. Microwaves are a type of electromagnetic wave. When microwaves are incident on the surface of microwave shielding mesh 300 or microwave shielding plate 400, they cause the free electrons to move. The free electrons after the movement will form an induced current with the same frequency as the incident microwave on the corresponding microwave shielding mesh 300 or microwave shielding plate 400. The induced current will generate a reverse microwave with the opposite phase to the incident microwave. The reverse microwave will superimpose and cancel the incident microwave, so that most of the electromagnetic energy of the microwave is reflected back, thus realizing the shielding function of microwave.

[0052] like Figure 2 and Figure 3As shown, the microwave shielding plate 400 and the microwave shielding mesh 300 are disposed on the outside of the inner liner 100. The microwave shielding mesh 300 is sandwiched between the outer wall of the inner liner 100 and the microwave shielding plate 400. The connecting terminal 210 passes through the microwave shielding mesh 300 and the microwave shielding plate 400 in sequence. In this way, the microwave moving along the surface of the connecting terminal 210 and through the mounting hole 110 will come into contact with the shielding mesh and the microwave shielding plate 400 in sequence. Thus, the microwave shielding mesh 300 achieves the first shielding of the microwave, and the microwave shielding plate 400 achieves the second shielding of the microwave, thereby achieving double shielding of the microwave and reducing microwave leakage at the mounting hole 110. Furthermore, the microwave shielding plate 400 presses the microwave shielding mesh 300 against the inner liner 100, causing the microwave shielding mesh 300 to deform and fit tightly against the outer wall of the inner liner 100. This reduces the gaps between the microwave shielding mesh 300 and the outer wall of the inner liner 100, as well as the gaps between the microwave shielding mesh 300 and the microwave shielding plate 400, blocking microwave leakage paths through the gaps between the mounting hole 110 and the microwave shielding mesh 300, and between the microwave shielding mesh 300 and the microwave shielding plate 400, thereby further improving the reliability of microwave shielding. Consequently, the microwave shielding mesh 300 and the microwave shielding plate 400 are configured to jointly prevent microwave leakage from the cooking cavity through the mounting hole 110.

[0053] Therefore, in this embodiment, by sealing the connection terminal 210 with the mounting hole 110, steam inside the inner pot 100 can be prevented from leaking out of the inner pot through the connection terminal 210 and the mounting hole 110. By placing the microwave shielding mesh 300 and the microwave shielding plate 400 outside the inner pot, and pressing the microwave shielding mesh 300 against the outer wall of the inner pot 100 by the microwave shielding plate 400, and tightly fitting the outer wall of the inner pot 100, the connection terminal 210 passes through the microwave shielding mesh 300 and the microwave shielding plate 400 in sequence. In this way, when microwaves leak outward along the surface of the connection terminal 210 through the mounting hole 110, they can be doubly shielded by the microwave shielding mesh 300 and the microwave shielding plate 400, thereby improving the safety and reliability of the cooking equipment.

[0054] In some embodiments, a microwave shielding structure 410 is provided along the circumferential edge of the microwave shielding plate 400, and the wave impedance of the microwave shielding structure 410 is mismatched with the air wave impedance.

[0055] It is understandable that while the main body of the microwave shielding plate 400 can effectively block microwaves, the gaps or sharp points where its circumferential edges contact the air are weak points where electromagnetic waves can easily diffract and leak. By setting up a dedicated microwave shielding structure 410 and making its wave impedance mismatched with that of the air, a sudden change in wave impedance can be created in the microwave shielding structure 410. This strongly reflects microwaves attempting to escape from the edges, thereby changing the propagation direction of the microwaves and preventing microwave leakage from the edges of the microwave shielding plate 400. By designing the specific structure of the microwave shielding structure 410, the reflected microwaves can be concentrated towards the center of the microwave shielding plate 400.

[0056] like Figure 4 , Figure 5 and Figure 6 As shown, in some optional embodiments, the edge of the microwave shielding plate 400 is provided with a plurality of tooth-shaped structures 411 arranged sequentially and spaced apart along the circumferential direction, and the plurality of tooth-shaped structures 411 form a microwave shielding structure 410.

[0057] It is understood that the toothed structure 411 has raised teeth and recessed grooves. Due to the different shapes of the teeth and grooves, different wave impedances can be formed, resulting in a severe mismatch between the wave impedance at the toothed structure 411 and the wave impedance of air. This causes the multiple toothed structures 411 arranged at intervals along the circumference of the microwave shielding plate 400 to form a region with periodically changing wave impedance at the edge of the microwave shielding plate 400. This region with periodically changing wave impedance surrounds the main body of the microwave shielding plate 400. When microwaves attempt to leak from the edge of the microwave shielding plate 400, they all enter this region with changing wave impedance, are dispersed by the toothed structures 411, and are efficiently reflected back, thus greatly enhancing the microwave shielding capability at the edge of the microwave shielding plate 400.

[0058] like Figure 2 As shown, in some optional embodiments, the gap between adjacent tooth structures 411 is less than one-quarter of the microwave wavelength. For example, the microwave wavelength corresponding to 2450MHz is about 30.6mm, so one-quarter of the wavelength is about 7.65mm. Therefore, in the embodiments of this application, the gap between adjacent tooth structures 411 is 0.1mm to 7.6mm. Figure 2 The gap between adjacent toothed structures 411 is shown at point K in the diagram.

[0059] It is understandable that setting the gap between adjacent toothed structures 411 to less than 7.6 mm makes the distance between connected toothed structures 411 less than a quarter wavelength of microwave. This way, when a microwave passes through the gap between adjacent toothed structures, the wavelength and gap size mismatch forces the microwave to be cut off, causing energy attenuation and preventing microwave leakage. Furthermore, setting the gap between adjacent toothed structures 411 to greater than 0.1 mm reduces the processing difficulty of the gap, thus reducing manufacturing costs. A gap of 0.1 mm to 7.6 mm can simultaneously meet the requirements of sufficient microwave shielding capability and reduced manufacturing costs. This makes the gap between adjacent toothed structures 411 easy to process while avoiding a weakened microwave shielding effect due to an excessively large gap.

[0060] In some embodiments, the microwave shielding plate 400 has a groove 420 on the side facing the inner liner 100, and a plurality of toothed structures 411 are arranged sequentially at intervals along the circumferential edge of the groove 420, and each toothed structure 411 extends at least from the edge of the groove 420 toward the center of the groove 420.

[0061] The groove 420 of the microwave shielding plate 400 faces the inner liner 100. Therefore, microwaves leaking from the mounting hole 110 of the inner liner 100 along the connection terminal 210 will enter the groove 420. The groove wall and bottom of the groove 420 can reflect microwaves. On the one hand, this increases the number of microwave reflections, thereby enabling the microwave energy to attenuate rapidly and reducing the risk of microwave leakage. On the other hand, since the toothed structure 411 extends from the edge of the groove 420 towards the center of the groove 420, when microwaves pass through the toothed structure 411, some microwaves will move towards the center of the microwave shielding plate 400 along the extension direction of the toothed structure 411. For microwaves to leak from the edge of the microwave shielding plate 400, they need to bypass the groove wall of the groove 420 and the microwave shielding structure 410. This lengthens the microwave leakage path, thereby increasing the microwave attenuation, reducing the risk of microwave leakage, and increasing the reliability of microwave shielding.

[0062] In some embodiments, each toothed structure 411 includes a first tooth 4111 and a second tooth 4112. The first end of the first tooth 4111 is connected to the edge of the groove 420, and the second end of the first tooth 4111 extends toward the center of the groove 420. The first end of the second tooth 4112 is connected to the second end of the first tooth 4111 and is angled with the first tooth 4111. The second end of the second tooth 4112 extends toward the bottom wall of the groove 420, and there is a gap between the end of the second end of the second tooth 4112 and the bottom wall of the groove 420, so that the cross-section of the toothed structure 411 generally presents a G-shaped structure (e.g., ...). Figure 5(as shown in the figure); where the cross section of the toothed structure 411 refers to the cross section obtained by cutting the toothed structure 411 along the thickness direction of the microwave shielding plate 400.

[0063] By setting the first tooth 4111, a transitional wave impedance change step is formed between the air and the microwave shielding plate 400. When microwaves leak from the microwave shielding plate 400 to the air, they will pass through the first tooth 4111, thus more efficiently reflecting the microwaves to the center of the microwave shielding plate, ensuring the reliability of microwave shielding. In addition, the second tooth can reflect the microwaves a second time, so that the energy of the microwaves is consumed in large quantities, further reducing the risk of microwave leakage from the edge of the microwave shielding plate 400.

[0064] In some alternative embodiments, the bottom wall of the groove 420 has a boss 421 extending toward the inner liner 100, and the microwave shielding mesh 300 is sandwiched between the boss 421 and the outer wall surface of the inner liner 100.

[0065] It is understandable that, since the area of ​​the boss 421 is smaller than the area of ​​the microwave shielding plate 400, by setting the boss 421 and clamping the microwave shielding mesh 300 between the boss 421 and the outer wall of the inner liner 100, the area of ​​the clamping part between the microwave shielding plate 400 and the microwave shielding mesh 300 is reduced. This allows the microwave shielding mesh 300 to deform sufficiently to better fit tightly against the outer wall of the inner liner 100. Furthermore, it also reduces the overall flatness requirement of the microwave shielding plate 400; only the flatness of the side of the boss 421 facing the microwave shielding mesh 300 needs to be ensured. This also reduces the processing difficulty of the microwave shielding plate 400, making it easier to manufacture. In addition, the microwaves propagating along the connecting terminal 210 first contact the boss 421, thus forming the first layer of barrier against microwaves. Subsequently, microwaves propagating towards the edge of the boss 421 enter the groove 420 and reach the toothed structure 411, where a second layer of barrier against microwaves is formed. In this way, multiple shielding of microwaves is achieved on the microwave shielding plate 400, thereby improving the microwave shielding effect.

[0066] In some alternative embodiments, the gap between the first tooth 4111 and the outer wall of the inner liner 100 is less than 1 mm.

[0067] This configuration ensures that the gap between the first tooth 4111 and the outer wall of the inner liner 100 is smaller than the wavelength of the microwave, thereby preventing microwave leakage from the gap between the first tooth 4111 and the outer wall of the inner liner 100.

[0068] In some embodiments, the microwave shielding mesh 300 is a metal wire mesh; the microwave shielding plate 400 is a metal plate. The metal wire mesh is easily bent and deformable, and contains a large number of free electrons that can be used to shield microwaves. The metal plate has rigidity, allowing the metal wire mesh to deform and fit more tightly against the outside of the inner liner 100 when the microwave shielding plate 400 is clamped onto it. Simultaneously, the metal plate also contains a large number of free electrons that can be used to shield microwaves. Specifically, a conductive surface is formed on the microwave shielding mesh 300 and the microwave shielding plate 400, causing microwaves to be reflected on this surface, thereby giving the microwave shielding mesh 300 and the microwave shielding plate 400 excellent shielding performance.

[0069] In some embodiments, the cooking device further includes a sealing gasket 500, which is sleeved on the connecting terminal 210 and sandwiched between the microwave shielding mesh 300 and the microwave shielding plate 400. The sealing gasket 500 is used to seal the gap between the connecting terminal 210 and the mounting hole 110.

[0070] In this way, by setting the sealing gasket 500, the airtightness of the inner pot 100 can be increased, preventing steam from escaping into the air or into electrical areas such as electronic components and circuit boards located inside the cooking equipment but outside the inner pot 100 through the gap between the mounting hole 110 and the connecting terminal 210. This gives the mounting hole 110 a dual protective function of microwave shielding and airtightness. At the same time, the elasticity of the sealing gasket 500 can absorb and buffer the installation pressure between the microwave shielding mesh 300 and the microwave shielding plate 400, as well as the stress caused by thermal expansion and contraction, allowing the microwave shielding mesh 300 to maintain its shielding performance for a longer period of time. In addition, the elasticity of the sealing gasket 500 can make the pressure of the microwave shielding plate 400 acting on the microwave shielding mesh 300 more even, thereby making the microwave shielding mesh 300 fit more tightly with the outer wall of the inner pot 100.

[0071] In some embodiments, the sealing gasket 500 has a sealing sleeve 510 extending along the extending direction of the connecting terminal 210, and the microwave shielding plate 400 has a through hole 430 through which the connecting terminal 210 passes. The sealing sleeve 510 is located between the peripheral wall of the connecting terminal 210 and the hole wall of the through hole 430. The sealing sleeve 510 can extend into the through hole 430, thereby achieving a seal between the periphery of the connecting terminal 210 and the hole wall of the through hole 430, preventing vapor from escaping from the gap between the connecting terminal 210 and the through hole 430. At the same time, the sealing sleeve 510 can also guide the connecting terminal 210, making it easier and more accurate for the connecting terminal 210 to align and pass through the through hole 430 on the microwave shielding plate 400.

[0072] In some embodiments, the cooking appliance further includes a fastener 600, a microwave shield 400 having a recessed area 440 on the side opposite to the inner pot 100, the fastener 600 being configured to connect the microwave shield 400 to the connection terminal 210, and at least a portion of the structure of the fastener 600 being accommodated within the recessed area 440.

[0073] After the microwave shielding plate 400 presses the microwave shielding mesh 300 tightly against the outer wall of the inner pot 100, the fasteners 600 can keep the position of the microwave shielding plate 400 and the inner pot 100 relatively fixed, thereby continuously providing a clamping force to the microwave shielding mesh 300. Furthermore, at least a portion of the fastener 600 is accommodated within the recessed area 440, allowing the fastener 600 to be hidden within the recessed area 440, thus reducing the length of the fastener 600 extending beyond the shielding plate on the side away from the inner pot 100. This makes the entire cooking device more compact in the axial direction of the connecting terminal 210, which is beneficial for the miniaturization of the cooking device. In addition, the recessed area 440 can provide protection for the fastener 600, reducing the risk of the fastener 600 getting stuck or corroded due to external foreign objects (such as dust, condensation, etc.) directly dripping onto the fastener 600.

[0074] Optionally, the fastener 600 can be a nut, pin, retainer, etc., which can be selectively used depending on the specific connection method with the connecting terminal 210. This embodiment does not make specific limitations in this regard.

[0075] It should be noted that the terms "one embodiment," "embodiment," "exemplary embodiment," "some embodiments," etc., mentioned in the specification indicate that the described embodiment may include a specific feature, structure, or characteristic, but not every embodiment necessarily includes that specific feature, structure, or characteristic. Furthermore, such phrases do not necessarily refer to the same embodiment. Moreover, when a specific feature, structure, or characteristic is described in connection with an embodiment, implementing such a feature, structure, or characteristic in conjunction with other embodiments, whether explicitly described or not, is within the knowledge scope of those skilled in the art.

[0076] Generally speaking, terms should be understood at least in part by their use in context. For example, at least in part by context, the term "one or more" as used in the text can be used to describe any feature, structure, or characteristic of the singular meaning, or a combination of features, structures, or characteristics of the plural meaning. Similarly, at least in part by context, terms such as "a" or "the" can also be understood to convey either singular or plural usage.

[0077] It should be readily understood that the terms “on,” “above,” and “on top of” in this application should be interpreted in the broadest possible sense, such that “on” means not only “directly on something” but also “on something” with an intermediate feature or layer therebetween, and that “above” or “on top of” means not only “on something” but also “on something” without an intermediate feature or layer therebetween (i.e., directly on something).

[0078] Furthermore, for ease of explanation, spatially relative terms such as "below," "below," "under," "above," and "above" may be used to describe the relationship of one element or feature relative to other elements or features as shown in the figures. Spatially relative terms are intended to encompass different orientations of the device in use or operation other than those shown in the figures. The device may have other orientations (rotated 90° or in other orientations), and the spatially relative descriptive terms used herein may be interpreted accordingly.

[0079] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A cooking device, comprising an inner pot (100) and a heating tube (200), wherein the inner pot (100) has a cooking cavity inside, the inner pot (100) has a mounting hole (110) on its side wall, the heating tube (200) is disposed in the cooking cavity, the heating tube (200) has a connecting terminal (210), the connecting terminal (210) extends out of the inner pot (100) from the mounting hole (110), and the connecting terminal (210) is sealed to the mounting hole (110); Its features are, The cooking equipment also includes a microwave shielding mesh (300) and a microwave shielding plate (400), both of which are located outside the inner pot (100). The microwave shielding mesh (300) is sandwiched between the outer wall of the inner pot (100) and the microwave shielding plate (400). The microwave shielding plate (400) presses the microwave shielding mesh (300) towards the inner pot (100) to deform the microwave shielding mesh (300) and fit it tightly against the outer wall of the inner pot (100). The connecting terminal (210) passes through the microwave shielding mesh (300) and the microwave shielding plate (400) in sequence. The microwave shielding mesh (300) and the microwave shielding plate (400) are configured to jointly prevent microwaves in the cooking cavity from leaking through the mounting hole (110).

2. The cooking apparatus according to claim 1, characterized in that, A microwave shielding structure (410) is provided along the circumferential edge of the microwave shielding plate (400), and the wave impedance of the microwave shielding structure (410) is not matched with the air wave impedance.

3. The cooking apparatus according to claim 2, characterized in that, The edge of the microwave shielding plate (400) is provided with a plurality of tooth-shaped structures (411) arranged sequentially and spaced apart along the circumference, and the plurality of tooth-shaped structures (411) form the microwave shielding structure.

4. The cooking apparatus according to claim 3, characterized in that, The gap between adjacent toothed structures (411) is 0.1 mm to 7.6 mm.

5. The cooking apparatus according to claim 3, characterized in that, The microwave shielding plate (400) has a groove (420) on the side facing the inner liner (100), and a plurality of toothed structures (411) are arranged sequentially at intervals along the circumferential edge of the groove (420), and each toothed structure (411) extends at least from the edge of the groove (420) toward the center of the groove (420).

6. The cooking apparatus according to claim 5, characterized in that, Each of the toothed structures (411) includes a first tooth (4111) and a second tooth (4112). The first end of the first tooth (4111) is connected to the edge of the groove (420), and the second end of the first tooth (4111) extends toward the center of the groove (420). The first end of the second tooth (4112) is connected to the second end of the first tooth (4111) and is set at an angle with the first tooth (4111). The second end of the second tooth (4112) extends toward the bottom wall of the groove (420), and there is a gap between the end of the second end of the second tooth (4112) and the bottom wall of the groove (420), so that the cross-section of the toothed structure (411) is G-shaped.

7. The cooking apparatus according to claim 6, characterized in that, The bottom wall of the groove (420) has a boss (421) extending toward the inner liner, and the microwave shielding mesh (300) is sandwiched between the boss (421) and the outer wall of the inner liner (100).

8. The cooking apparatus according to claim 7, characterized in that, The gap between the first tooth (4111) and the outer wall of the inner liner (100) is less than 1 mm; and / or, The microwave shielding mesh (300) is a metal wire mesh; the microwave shielding plate (400) is a metal plate.

9. The cooking apparatus according to claim 1, characterized in that, The cooking device also includes a sealing gasket (500), which is sleeved on the connecting terminal (210) and sandwiched between the microwave shielding mesh (300) and the microwave shielding plate (400). The sealing gasket (500) is used to seal the gap between the connecting terminal (210) and the mounting hole (110).

10. The cooking apparatus according to claim 9, characterized in that, The sealing gasket (500) has a sealing sleeve (510) extending along the extension direction of the connecting terminal (210), the microwave shielding plate (400) has a through hole (430) through which the connecting terminal (210) passes, and the sealing sleeve (510) is located between the peripheral wall of the connecting terminal (210) and the wall of the through hole (430); and / or, The cooking device also includes a fastener (600), the microwave shield (400) having a recessed area (440) on the side opposite to the inner pot (100), the fastener (600) being configured to connect the microwave shield (400) to the connection terminal (210), and at least a portion of the structure of the fastener (600) being accommodated within the recessed area (440).

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