Microwave shielding assembly and microwave cooking appliance

Abstract

A microwave shielding assembly and microwave cooking appliance are provided. [Solution] A microwave shielding assembly includes a shielding case and a shielding cover, in which a shielding cavity is formed, one of a first choke structure and a second choke structure is provided outside the opening of the shielding cavity, both the first choke structure and the second choke structure are arranged along the circumferential direction of the shielding cavity, the shielding cover covers the shielding cavity in an openable and closable manner, and the other of the first choke structure and the second choke structure is provided, the first choke structure has a first sealed end face, and the second choke structure has a second sealed end face opposite the first sealed end face, at least a portion of the choke cavity is located on one side of the second sealed end face away from the first choke structure, and the opening of the choke cavity is located at one end of the second sealed end face away from the opening of the shielding cavity.

Description

[Technical Field]

[0001] FIELD OF THE INVENTION The present invention relates to the field of microwave cooking, and more particularly to microwave shielding assemblies and microwave cooking appliances. [Background technology]

[0002] Microwave cooking appliances such as microwave ovens and microwave rice cookers require a sealed cavity to heat food, and gaps between the oven door and the cavity can cause microwave leakage. In related art, the oven body and lid of a microwave cooking appliance are crimped together at their tightly fitting flat surfaces, and a choke cavity is provided on the outside of the sealed end faces to form a choke structure, thereby achieving the purpose of preventing microwave leakage. However, with this configuration, the cross-sectional size of the microwave cooking appliance is relatively large. Summary of the Invention [Problem to be solved by the invention]

[0003] The main object of the present invention is to provide a microwave shielding assembly and a microwave cooking appliance, which intends to realize microwave shielding and avoid the cross-sectional size of the microwave cooking appliance being too large. [Means for solving the problem]

[0004] In order to achieve the above object, the microwave shielding assembly according to the present invention comprises: a shielding case in which a shielded cavity is formed, wherein one of a first choke structure and a second choke structure is provided outside an opening of the shielded cavity, and both the first choke structure and the second choke structure are provided along a circumferential direction of the shielded cavity; a shielding cover that covers the shielding cavity in an openable and closable manner, and in which the other of the first choke structure and the second choke structure is provided; The first choke structure has a first sealed end face, the second choke structure has a second sealed end face opposite the first sealed end face, and a choke cavity is formed, at least a part of the choke cavity is located on one side of the second sealed end face away from the first choke structure, and an opening of the choke cavity is located at one end of the second sealed end face away from the opening of the shielding cavity and is located opposite the first sealed end face.

[0005] In one embodiment of the present application, the first choke structure includes a first elongated plate, one surface of which forms the first sealed end surface.

[0006] In one embodiment of the present application, the second choke structure comprises: a second extension plate provided opposite the first choke structure; a first side plate provided on one side of the second extension plate away from the first choke structure and facing the second extension plate; a second side plate extending from the first side plate in a direction approaching the first choke structure and having one end remote from the first side plate spaced apart from the second extension plate to form an opening of the choke cavity, the first side plate, the second side plate and the second extension plate surrounding each other to form the choke cavity.

[0007] In one embodiment of the present application, the second side plate is provided with several notches arranged along the circumferential direction of the shielding cavity.

[0008] In one embodiment of the present application, if the wavelength of the microwave in the shielding cavity is λ, the width of the choke cavity is B1, the width of the second extension plate is B2, and the height of the choke cavity is H, then B1+H+0.5B2=λ / 4 is satisfied.

[0009] In one embodiment of the present application, the width B1 of the choke cavity satisfies 10 mm≦B1≦20 mm.

[0010] In one embodiment of the present application, an end of the second extension plate extends into the choke cavity to form a bent portion, And / or, the second extension plate is integrally molded with the shielding cover or the shielding case, and the first side plate and the second side plate are integrally molded and correspondingly connected to the shielding cover or the shielding case.

[0011] In one embodiment of the present application, the first choke structure is provided on the shielding cover, and the second choke structure is provided on the shielding case; Alternatively, the second choke structure is provided on the shielding cover, and the first choke structure extends outward from an opening of the shielding cavity.

[0012] In one embodiment of the present application, the opening of the shielding cavity is located at an upper portion of the shielding case, the shielding cover is located above the shielding case, and the first choke structure and the second choke structure are arranged along a height direction of the microwave shielding assembly; And / or, the shielding cover further includes a top cover and a peripheral portion, the top cover being disposed opposite the shielding cavity, and the peripheral portion being disposed around the top cover in a circumferential direction.

[0013] The present application further provides a microwave cooking appliance, comprising: an appliance body; and a microwave shielding assembly according to any of the above-described embodiments, wherein the appliance body comprises a pot body and a lid body, the pot body being provided with a shielding case for the microwave shielding assembly, and the lid body being provided with a shielding cover for the microwave shielding assembly.

[0014] The microwave shielding assembly of the present invention includes a shielding case and a shielding cover that surround the shielding case to form a shielding cavity, and a first choke structure and a second choke structure, respectively, that are press-fitted together to provide a good seal between the shielding case and the shielding cover, thereby reducing or preventing microwave leakage outside the shielding cavity. The second choke structure also includes a choke cavity, the opening of which is located away from the opening of the shielding cavity in the second sealed end face and faces the first sealed end face. Even if a gap exists between the first and second sealed end faces, causing some microwave leakage, the microwaves that pass through the second sealed end face enter the choke cavity through the opening and are consumed, preventing microwaves from continuing to leak outside. In other words, the microwave shielding assembly provided in the present application has a good choke effect and can effectively prevent microwave leakage. Furthermore, since the choke cavity is located on one side of the second sealed end face away from the first choke structure, the cross-sectional size of the microwave shielding assembly is not increased, thereby preventing the cross-sectional sizes of the microwave shielding assembly and the microwave cooking appliance from becoming too large, which is advantageous for realizing a compact structure for the microwave cooking appliance. [Brief explanation of the drawings]

[0015] In order to more clearly describe the embodiments of the present invention or the technical solutions of the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. It is obvious that the drawings described below are only some embodiments of the present invention, and those skilled in the art can obtain other drawings based on the structures shown in these drawings without any creative work.

[0016] [Figure 1] FIG. 1 is a cross-sectional view of an embodiment of a microwave cooking appliance according to the present invention. [Figure 2]FIG. 2 is a structural diagram of an embodiment of a microwave cooker according to the present application with the pot body and lid removed. [Figure 3] FIG. 3 is a cross-sectional view of the microwave cooking appliance of FIG. [Figure 4] FIG. 4 is an enlarged view of a portion A in FIG. [Figure 5] FIG. 5 is an enlarged view of the locations of the first and second choke structures in another embodiment of a microwave shielding assembly according to the present application.

[0017] The realization of the objects, functional features and advantages of the present invention will be further explained with reference to the drawings in combination with the embodiments. DETAILED DESCRIPTION OF THE INVENTION

[0018] The following clearly and completely describes the technical solutions of the embodiments of the present invention in combination with the drawings of the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present invention.

[0019] It should be noted that all directional indications (e.g., up, down, left, right, front, back, etc.) in the embodiments of the present invention are merely for interpreting the relative positional relationships, movement conditions, etc. between each component in a specific posture (as shown in the drawings), and when the specific posture changes, the directional indications also change accordingly.

[0020] In the present invention, unless otherwise clearly specified or limited, terms such as "connected," "fixed," etc. should be understood in a broad sense. For example, unless otherwise clearly limited, "fixed" may mean fixedly connected, detachably connected, or integrated, may be mechanically connected, or electrically connected, may be directly connected, or indirectly connected via an intermediate medium, may be internal communication between two elements, or may be an interactive relationship between two elements. Those skilled in the art can understand the specific meaning of the above terms in the present invention based on specific circumstances.

[0021] Furthermore, in the present invention, the terms "first," "second," etc. are for descriptive purposes only and should not be understood as indicating or implying the relative importance or the number of technical features indicated. Therefore, a feature defined by "first" or "second" may explicitly or implicitly include at least one of the feature. Furthermore, the technical solutions in each embodiment may be combined with each other, but this is limited to the extent that it is feasible by a person skilled in the art. If a combination of technical solutions causes a contradiction or is not feasible, such combination of technical solutions shall be deemed not to exist and shall not be included in the scope of protection of the claimed invention.

[0022] The present invention provides a microwave shielding assembly 100, which is applied to a microwave cooking appliance 1, and can prevent microwave leakage from the microwave cooking appliance 1.

[0023] 1 to 5, in some embodiments of the present application, a microwave shielding assembly 100 includes a shielding case 10 and a shielding cover 30, a shielding cavity 113 is formed in the shielding case 10, one of a first choke structure 11 and a second choke structure 35 is provided outside the opening of the shielding cavity 113, both the first choke structure 11 and the second choke structure 35 are provided along the circumferential direction of the shielding cavity 113, the shielding cover 30 covers the shielding cavity 113 in an openable and closable manner, and the first choke structure 11 is provided in the shielding case 10. The other of the first and second choke structures 35 is provided, the first choke structure 11 is provided with a first sealed end face, the second choke structure 35 is provided with a second sealed end face opposite the first sealed end face, and a choke cavity 359 is formed, at least a part of the choke cavity 359 is located on one side of the second sealed end face away from the first choke structure 11, and the opening of the choke cavity 359 is located at one end of the second sealed end face away from the opening of the shielding cavity 113 and is located opposite the first sealed end face.

[0024] In the embodiments of the present application, the shielding case 10 is at least partially made of a metal material, a metal-based composite material, or other material with microwave shielding function, and the shielding cover 30 is at least partially made of a metal material, a metal-based composite material, or other material with microwave shielding function. When the shielding cover 30 covers the shielding case 10, the shielding case 10 and the shielding cover 30 form a surrounding shielding cavity 113. When the microwave shielding assembly 100 is applied to a microwave cooking appliance 1, the shielding case 10 and the shielding cover 30 can be directly used as the cooking body, and the shielding cavity 113 can be used to accommodate food ingredients, or an inner pot 220 can be provided in the shielding cavity 113, and the inner pot 220 forms a cooking cavity 221 for accommodating food ingredients. The microwave generating module 240 of the microwave cooker 1 generates microwaves and radiates them into the shielding cavity 113, directly heating the food inside the shielding cavity 113. The shielding cavity acts as a shield against microwaves, with some microwaves being absorbed by metallic materials. When microwaves pass through the metal, the electric and magnetic fields of the electromagnetic waves act on free electrons, causing them to vibrate slightly, converting the microwave energy into heat energy. This absorption effectively weakens or eliminates the transmission and radiation of microwaves. The metal inner wall of the shielding cavity 113 also acts as a reflective shield against microwaves. The working principle of the metal reflective layer is that when microwaves encounter conductive electrons on the surface of the metal material, inductive coupling and eddy current effects occur, causing the microwaves to reflect, deviating from their original transmission direction and propagating back in the original direction, thereby achieving the purpose of shielding. Common reflective materials include metal reflective layers, aluminum plates, copper plates, etc.

[0025] Furthermore, first choke structure 11 and second choke structure 35 are provided on shielding case 10 and shielding cover 30, respectively. First choke structure 11 and second choke structure 35 are located outside the opening of shielding cavity 113 and are both arranged around the periphery of shielding cavity 113. The first sealed end face of first choke structure 11 and the second sealed end face of second choke structure 35 are crimped together to form a good sealed structure outside the opening of shielding cavity 113, thereby fulfilling the first shielding role and reducing the leakage of microwaves from shielding cavity 113 to the outside.

[0026] Furthermore, the width of the first sealed end face is made larger than the width of the second sealed end face, thereby forming a choke cavity 359 in the second choke structure 35. The choke cavity 359 has an opening facing the first sealed end face, and the opening of the choke cavity 359 is located on one side of the second sealed end face, away from the opening of the shielding cavity 113. By doing this, even if a gap exists between the first and second sealed end faces, causing some microwaves to leak from the shielding cavity 113, the leaked microwaves will enter the choke cavity 359 through the opening and be consumed. In other words, the microwaves are shielded again by the choke cavity 359, which significantly reduces the amount of microwave leakage, improves the choke effect of the microwave shielding assembly 100, and effectively prevents microwaves from leaking to the outside. Furthermore, by arranging the choke cavity 359 and the first and second sealed end faces along the height direction of the microwave shielding assembly 100, the cross-sectional size of the microwave shielding assembly 100 is not increased, which effectively reduces the volume of the microwave shielding assembly 100 and the microwave cooking appliance 1, and prevents the microwave shielding assembly 100 from becoming too large. The cross-section of the microwave shielding assembly 100 refers to a cross-section parallel to the plane on which the opening of the shielding cavity 113 is located.

[0027] In the embodiments of the present application, the first choke structure 11 may be a block, a plate, or any other feasible structure, and the second choke structure 35 may be formed by bending a metal plate or by injection molding or other methods.

[0028] Therefore, it can be understood that the microwave shielding assembly 100 of the present application includes a shielding case 10 and a shielding cover 30 that are provided and enclosed to form a shielding cavity 113, a first choke structure 11 and a second choke structure 35 that are provided on the shielding case 10 and the shielding cover 30, respectively, and the first choke structure 11 and the second choke structure 35 are pressed against each other to provide a good sealing effect between the shielding case 10 and the shielding cover 30, thereby reducing or preventing microwave leakage outside the shielding cavity 113. In addition, a choke cavity 359 is provided in the second choke structure 35, and the opening of the choke cavity 359 is located at a position away from the opening of the shielding cavity 113 in the second sealed end face and is located opposite the first sealed end face. By doing this, even if a gap exists between the first sealed end face and the second sealed end face and some microwaves leak, the microwaves that pass through the second sealed end face at this time enter the choke cavity 359 from the opening and are consumed in the choke cavity 359, thereby preventing the microwaves from leaking to the outside. In other words, the microwave shielding assembly 100 provided in the present application has a good choke effect and can effectively prevent the microwaves from leaking to the outside. Furthermore, since the choke cavity 359 is located on one side of the second sealed end face away from the first choke structure 11, the cross-sectional size of the microwave shielding assembly 100 is not increased, thereby preventing the cross-sectional sizes of the microwave shielding assembly 100 and the microwave cooking appliance 1 from becoming too large, which is advantageous for realizing a compact structure for the microwave cooking appliance 1.

[0029] Referring to Figures 1 to 3, the opening of the shielding cavity 113 is located at the top of the shielding case 10, the shielding cover 30 is located above the shielding case 10, and the first choke structure 11 and the second choke structure 35 are arranged along the height direction of the microwave shielding assembly 100.

[0030] In an embodiment of the present application, the microwave shielding assembly 100 can be applied to a microwave cooking appliance 1 such as a microwave rice cooker. When the microwave cooking appliance 1 is a microwave rice cooker, it can realize rice cooking, porridge cooking, soup cooking, and other microwave oven heating functions. The microwave rice cooker includes a pot body 210 and a lid 230. The pot body 210 is formed with a heating cavity with an open top. The heating cavity can be used to directly accommodate food, or an inner pot 220 can be provided in the heating cavity. Microwaves can pass through the inner pot 220 to heat ingredients placed in the inner pot. When the microwave shielding assembly 100 is applied to a microwave rice cooker, the shielding case 10 is provided on the pot body 210, the shielding cavity 113 of the shielding case 10 can function as a heating cavity, the shielding cover 30 covers the top of the shielding case 10 in an openable and closable manner, the first choke structure 11 and the second choke structure 35 are arranged along the height direction of the microwave shielding assembly 100, and the shielding cover 30 can be part of the lid body 230 of the microwave rice cooker, which is easy to use.

[0031] 4 and 5, in some embodiments of the present application, the first choke structure 11 includes a first elongated plate 111, one surface of which forms a first sealed end surface.

[0032] In this embodiment, the first choke structure 11 is provided as a plate-like structure, and includes a first extension plate 111 and a first bending portion 357 connected together. In this case, the first choke structure 11 and the shielding cover 30 or the shielding case 10 can be press-molded to improve processing convenience.

[0033] Referring to Figures 4 and 5, in some embodiments of the present application, the second choke structure 35 includes a second extension plate 351, a first side plate 353 and a second side plate 355, wherein the second extension plate 351 is arranged opposite the first choke structure 11, and the first side plate 353 is arranged on one side of the second extension plate 351 away from the first choke structure 11 and opposite the second extension plate 351.

[0034] The second side plate 355 extends from the first side plate 353 in a direction approaching the first choke structure 11, and one end of the second side plate 355 away from the first side plate 353 is spaced apart from the second extension plate 351 to form an opening of the choke cavity 359, and the first side plate 353, the second side plate 355 and the second extension plate 351 together form the surrounding choke cavity 359.

[0035] In this embodiment, the second choke structure 35 is provided as a plate-like structure, and includes a second extension plate 351 and a first side plate 353 and a second side plate 355 connected thereto. The second extension plate 351 is provided at the opening position of the shielding cavity 113. One side of the second extension plate 351 forms a second sealed end face and is used for crimping with the first sealed end face of the first choke structure 11. The first side plate 353 and the second side plate 355 are connected and may be formed by bending a sheet metal member. The first side plate 353 is arranged opposite the second extension plate 351, the second side plate 355 extends from one end of the first side plate 353 toward the second extension plate 351, and one end of the second side plate 355 away from the first side plate 353 is arranged at a distance from the second extension plate 351, thereby forming a choke cavity 359 between the first side plate 353, the second side plate 355 and the second extension plate 351, and forming an opening of the choke cavity 359 between the second side plate 355 and the second extension plate 351. In addition, a third side plate may be provided at one end of first side plate 353 away from second side plate 355 to connect first side plate 353 and second extension plate 351 to seal choke cavity 359, and one end of first side plate 353 away from second side plate 355 may be extended to peripheral portion 33 of shielding cover 30 or the side wall of shielding case 10, so that choke cavity 359 is surrounded by first side plate 353, second side plate 355, second extension plate 351 and peripheral portion 33 of shielding cover 30 or the side wall of shielding case 10, and is not limited thereto.

[0036] 2, in some embodiments of the present application, the second side plate 355 is provided with several notches 3531 arranged along the circumferential direction of the shielding cavity 113. In this manner, the second side plate 355 includes several choke teeth 3533 arranged at intervals along the circumferential direction of the shielding cavity 113, and by providing the notches 3531, the microwave shielding choke structure has a good shielding effect against microwaves within a certain frequency range. The width range of the notches 3531 may be set as needed, and the intervals of the notches 3531 between adjacent choke teeth 3533 may be set to be the same or different.

[0037] 4 and 5, in some embodiments of the present application, the end of second extension plate 351 extends into choke cavity 359 to form bent portion 357. In this way, bent portion 357 can be used to improve the structural strength of second extension plate 351, reduce the risk of deformation of second extension plate 351, improve the flatness of the second sealed end surface of second extension plate 351, enable good crimping between first choke structure 11 and second extension plate 351, and reduce microwave leakage.

[0038] 4 and 5 , in some embodiments of the present application, where λ is the wavelength of the microwaves in shielding cavity 113, B1 is the width of choke cavity 359, B2 is the width of second extension plate 351, and H is the height of choke cavity 359, the equation B1 + H + 0.5B2 = λ / 4 is satisfied. This sets the distance from the opening of choke cavity 359 to the short-circuiting surface within the cavity to λ / 4, which induces phase reversal of the microwaves and thereby creates high impedance at the opening of choke cavity 359. As a result, the microwaves are canceled out by their reflected waves in the opposite direction at the opening of choke cavity 359. That is, microwaves passing between the first and second sealed end faces are blocked at the opening of choke cavity 359, effectively preventing microwave leakage.

[0039] In some embodiments of the present application, the width B1 of the choke cavity 359 satisfies 10 mm≦B1≦20 mm.

[0040] B1 can be any value between 10 mm, 12 mm, 15 mm, 17 mm, 18 mm, 20 mm, or any value between 10 mm and 20 mm, and is not limited thereto. If B1 is less than 10 mm, the choke effect of second choke structure 35 on microwaves is reduced, resulting in increased microwave leakage. If B1 is greater than 20 mm, microwave shielding assembly 100 is large in width and volume, which is detrimental to the miniaturization of microwave cooking appliance 1. By limiting width B1 of choke cavity 359 to between 10 mm and 20 mm, microwave shielding assembly 100 not only has good microwave shielding properties, but also has a small overall volume.

[0041] 3 and 4, the second extension plate 351 is integrally molded with the shielding cover 30 or the shielding case 10, and the first side plate 353 and the second side plate 355 are integrally molded and connected to the shielding cover 30 or the shielding case 10 correspondingly.

[0042] In the present embodiment, the first choke structure 11 and the second choke structure 35 are provided on the shielding case 10 and the shielding cover 30, respectively. That is, the second choke structure 35 may be provided on the shielding case 11, or the second choke structure 35 may be provided on the shielding cover 30. The second extension plate 351 of the second choke structure 35 may be integrally formed with the shielding case 11 or the shielding cover 30. Alternatively, the first side plate 353 and the second side plate 355 of the second choke structure 35 may be integrally formed, for example, by bending a material such as a sheet metal member, and then connecting the entire structure to the shielding case 10 or the shielding cover 30 on which the second extension plate 351 is provided, thereby improving the processing convenience of the microwave shielding assembly 100. For example, the second extension plate 351 and the shielding cover 30 may be integrally formed, and the structure formed by combining the first side plate 353 and the second side plate 355 may be connected to the shielding cover 30, as shown in the following embodiment.

[0043] In some embodiments, the first choke structure 11 and the shielding case 10 or the shielding cover 30 may be integrally formed, which improves processing convenience.

[0044] Referring to Figures 3 and 4, in some embodiments of the present application, the shielding cover 30 further includes a top cover 31 and a peripheral portion 33, where the top cover 31 is arranged opposite the shielding cavity 113 and the peripheral portion 33 is arranged around the top cover 31 in the circumferential direction.

[0045] In this embodiment, the shielding cover 30 includes a connected top cover 31 and a peripheral portion 33, the peripheral portion 33 being arranged along the circumferential direction of the top cover 31, the peripheral portion 33 and the top cover 31 surroundingly forming a storage space, and at one end of the peripheral portion 33 away from the top cover 31, the first extension plate 111 or the second extension plate 351 extends outside the storage space, thereby improving the structural stability of the shielding cover 30 and reducing the risk of deformation of the shielding cover 30. In some embodiments, the first choke structure 11 is a plate-like structure and is provided on the cover body 230, or the second choke structure 35 is provided with a second extension plate 351. In this case, by providing the shielding cover 30 as a combined structure of the top cover 31 and the peripheral portion 33, the flatness of the first extension plate 111 or the second extension plate 351 provided on the shielding cover 30 can be ensured, allowing for good crimping between the first sealed end face and the second sealed end face, reducing the gap between the first sealed end face and the second sealed end face, and reducing microwave leakage.

[0046] In some embodiments, the second choke structure 35 includes a first side plate 353, a second side plate 355, and a second extension plate 351, and the first side plate 353 is arranged opposite the second extension plate 351, and one end of the first side plate 353 away from the second side plate 355 may extend to the peripheral portion 33 of the shielding cover 30 and be connected to the peripheral portion 33 or the top cover 31, thereby the first side plate 353, the second side plate 355, the second extension plate 351, and the peripheral portion 33 of the shielding cover 30 together form a choke cavity 359.

[0047] 3 and 4, in some embodiments of the present application, the second choke structure 35 is provided in the shielding cover 30. In this way, the choke cavity 359 is located above the first choke structure 11, which also prevents the microwave shielding assembly 100 from becoming too large in volume. In some embodiments, the shielding cover 30 includes a top cover 31 and a peripheral portion 33, and the second extension plate 351 is provided at one end of the peripheral portion 33 remote from the top cover 31, and one end of the second side plate 355 remote from the first side plate 353 may be connected to the peripheral portion 33 or may extend to and be connected to the top cover 31.

[0048] 5, in some embodiments of the present application, the second choke structure 35 is provided in the shielding case 10. In this way, the choke cavity 359 is located below the first choke structure 11, which also prevents the microwave shielding assembly 100 from becoming too large in volume.

[0049] In some embodiments, the second choke structure 35 includes a first side plate 353, a second side plate 355, and a second extension plate 351, the second extension plate 351 extending outward from the opening edge of the shielding cavity 113, the first side plate 353 facing the second extension plate 351, and one end of the first side plate 353 connected to the side wall of the shielding case 10, the second side plate 355 extending from one end of the first side plate 353 away from the side wall of the shielding case 10 toward the second extension plate 351, and one end of the second side plate 355 away from the first side plate 353 being spaced apart from the second extension plate 351, at this time the first side plate 353, the second side plate 355, the second extension plate 351, and the side wall of the shielding case 10 together form a surrounding choke cavity 359.

[0050] 1 to 3, the present application further provides a microwave cooking appliance 1, which may be a microwave oven, a microwave rice cooker, or other cooking appliance that uses microwaves for heating. The microwave cooking appliance 1 includes an appliance body 200 and a microwave shielding assembly 100 according to any of the above-described embodiments. The appliance body 200 includes a pot body 210 and a lid 230. The shielding case 10 of the microwave shielding assembly 100 may be provided on the pot body 210, and the shielding cavity 113 of the shielding case 10 may be the cooking cavity 221. The inner pot 220 may be provided in the shielding cavity 113, and the cooking cavity 221 may be formed in the inner pot 220. The shielding cover 30 of the microwave shielding assembly 100 is provided on the lid 230, and when the lid 230 covers the pot body 210 to seal the cooking cavity 221, the shielding cover 30 covers the shielding case 10.

[0051] In some embodiments, when the microwave cooking appliance 1 is a microwave rice cooker, the lid 230 may be provided with a steam valve, which when opened, can connect the cooking cavity 221 with the outside space, discharge steam and other gases, stabilize the air pressure in the cooking cavity 221, and prevent the pressure in the cooking cavity 221 from becoming too high.

[0052] Furthermore, in some embodiments, the microwave cooking appliance 1 further includes structures such as a microwave generating module 240, a wave-guiding module 250, and an electronic control module 260, where the electronic control module 260 is used to control the operation of the microwave cooking appliance 1, the microwave generating module 240 is used to generate microwaves, and the wave-guiding module 250 can transmit the microwaves into the cooking cavity 221.

[0053] In some embodiments, the microwave generating module 240 is disposed on one side of the shielding case 10, and the waveguide module 250 includes an upper cover 251 and a lower cover 252 disposed opposite each other, forming a surrounding waveguide channel. The upper cover 251 is provided with a microwave outlet and a microwave inlet for inserting the antenna cap of the microwave generating module 240. The shielding case 10 and the microwave generating module 240 are disposed above the upper cover 251 and communicate with each other through the waveguide channel, so that the microwaves generated by the microwave generating module 240 enter the shielding cavity 113 through the waveguide channel. The waveguide module 250 may further include a support plate 253, which is disposed in the shielding cavity 113 and can be used to support the inner pot 220.

[0054] The microwave cooking appliance 1 provided in the present application applies all the technical solutions of all the embodiments described above, and therefore has at least all the beneficial effects of all the technical solutions described above, and will not be described again here.

[0055] The above is merely a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformation made using the contents of the specification and drawings of the present invention under the concept of the present invention, or any direct or indirect application to other related technical fields, is included in the patent protection scope of the present invention. [Explanation of symbols]

[0056] 1 microwave cooker 100 Microwave Shielding Assembly 10 Shielding case 11 First choke structure 111 1st stretching plate 113 Shielded Cavity 30 Shielding cover 31 Top cover 33 Periphery 35 Second choke structure 351 2nd drawing plate 353 1st side plate 3531 Notch 3533 Choke Teeth 355 2nd side plate 357 Bend 359 choke cavity 200 Equipment body 210 pot body 220 Inner pot 221 Cooking cavity 230 Lid 240 Microwave Generator Module 250 Waveguide Module 251 Upper cover 252 bottom cover 253 Receiving plate 260 Electronic Control Module

Claims

1. 1. A microwave shielding assembly comprising: a shielding case in which a shielded cavity is formed, wherein one of a first choke structure and a second choke structure is provided outside an opening of the shielded cavity, and both the first choke structure and the second choke structure are provided along a circumferential direction of the shielded cavity; a shielding cover that covers the shielding cavity in an openable and closable manner, and in which the other of the first choke structure and the second choke structure is provided; a first sealed end face of the first choke structure; a second sealed end face of the second choke structure facing the first sealed end face; a choke cavity formed in the second choke structure; at least a portion of the choke cavity located on one side of the second sealed end face away from the first choke structure; and an opening of the choke cavity located on one end of the second sealed end face away from the opening of the shielding cavity and facing the first sealed end face.

2. 2. The microwave shielding assembly of claim 1, wherein the first choke structure includes a first elongated plate, one surface of the first elongated plate forming the first sealed end surface.

3. The second choke structure comprises: a second extension plate provided opposite the first choke structure; a first side plate provided on one side of the second extension plate away from the first choke structure and facing the second extension plate; and a second side plate extending from the first side plate in a direction approaching the first choke structure and having one end remote from the first side plate spaced apart from the second extension plate to form an opening of the choke cavity, the first side plate, the second side plate, and the second extension plate surrounding the second side plate forming the choke cavity.

4. The microwave shielding assembly according to claim 3 , wherein the second side plate is provided with several notches arranged along the circumferential direction of the shielding cavity.

5. 4. The microwave shielding assembly according to claim 3, wherein, when a wavelength of the microwave in the shielding cavity is λ, a width of the choke cavity is B1, a width of the second extension plate is B2, and a height of the choke cavity is H, an equation of B1 + H + 0.5B2 = λ / 4 is satisfied.

6. The microwave shielding assembly according to claim 5, wherein the width B1 of the choke cavity satisfies 10 mm≦B1≦20 mm.

7. an end of the second extension plate extends into the choke cavity to form a bent portion; And / or the second extension plate is integrally formed with the shielding cover or the shielding case, and the first side plate and the second side plate are integrally formed and correspondingly connected to the shielding cover or the shielding case. The microwave shielding assembly according to claim 3 .

8. the first choke structure is provided on the shielding cover, and the second choke structure is provided on the shielding case; Alternatively, the second choke structure is provided on the shielding cover, and the first choke structure extends outward from an opening of the shielding cavity.

9. an opening of the shielding cavity is located at an upper portion of the shielding case, the shielding cover is located above the shielding case, and the first choke structure and the second choke structure are arranged along a height direction of the microwave shielding assembly; And / or, the shielding cover further includes a top cover and a peripheral portion, the top cover is provided opposite the shielding cavity, and the peripheral portion is provided along the circumferential direction of the top cover. The microwave shielding assembly according to any one of claims 1 to 7.

10. A microwave cooking appliance comprising: an appliance body; and the microwave shielding assembly according to claim 1, wherein the appliance body comprises a pot body and a lid body, the pot body being provided with a shielding case for the microwave shielding assembly, and the lid body being provided with a shielding cover for the microwave shielding assembly.

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