Microwave shielding assembly and microwave cooking utensil

Abstract

The utility model provides a microwave shielding assembly and a microwave cooking utensil, and relates to the technical field of microwave cooking, the microwave shielding assembly comprises a shielding shell and a shielding cover, the shielding shell forms a shielding cavity, the outer side of an opening of the shielding cavity is provided with one of a first choking structure and a second choking structure, the first choke structure and the second choke structure are arranged in a surrounding mode in the circumferential direction of the shielding cavity. The shielding cover covers the shielding cavity in an openable and closable manner and is provided with the other one of the first choking structure and the second choking structure; the first choking structure is provided with a first closed end face, the second choking structure is provided with a second closed end face opposite to the first closed end face, a choking cavity is formed, at least part of the choking cavity is located on the side, away from the first choking structure, of the second closed end face, and an opening of the choking cavity is located at the end, away from the opening of the shielding cavity, of the second closed end face. And the second sealing end face is opposite to the first sealing end face. According to the technical scheme, microwave shielding can be achieved, and the situation that the size of the microwave cooking utensil is too large is avoided.

Description

Technical Field

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

[0002] Microwave cooking appliances such as microwave ovens and microwave rice cookers need a sealed cavity to heat food, and the gap between the furnace door and the cavity may cause microwave leakage; in the related art, a tight planar press-fit is adopted between the furnace body and the cover body of the microwave cooking appliance, and a choke cavity is arranged outside the closed end face of the fit as a choke structure to achieve the purpose of preventing microwave leakage; this setting method makes the cross-sectional size of the microwave cooking appliance relatively large. Summary of the Utility Model

[0003] The main purpose of the utility model is to provide a microwave shielding component and a microwave cooking appliance, aiming to achieve microwave shielding while avoiding the over-large cross-sectional size of the microwave cooking appliance.

[0004] To achieve the above purpose, a microwave shielding component proposed by the utility model includes:

[0005] A shielding shell, the shielding shell forms a shielding cavity, and one of a first choke structure and a second choke structure is arranged outside the opening of the shielding cavity, and both the first choke structure and the second choke structure are arranged in a circumferential direction around the shielding cavity;

[0006] A shielding cover, the shielding cover is detachably covered on the shielding cavity, and the other of the first choke structure and the second choke structure is arranged;

[0007] The first choke structure is provided with a first closed end face, the second choke structure is provided with a second closed end face opposite to the first closed end face, and a choke cavity is formed, at least a part of the choke cavity is located on a side of the second closed end face away from the first choke structure, an opening of the choke cavity is located at an end of the second closed end face far from the opening of the shielding cavity and is opposite to the first closed end face.

[0008] In an embodiment of the present application, the first choke structure includes a first extension plate, and one side surface of the first extension plate forms the first closed end face.

[0009] In an embodiment of the present application, the second choke structure includes:

[0010] A second extension plate, the second extension plate is arranged opposite to the first choke structure;

[0011] A first side plate, the first side plate is disposed on a side of the second extension plate away from the first choke structure and is disposed opposite to the second extension plate; and

[0012] A second side plate, wherein the second side plate extends from the first side plate toward the first choke structure, and an end of the second side plate away from the first side plate is spaced apart from the second extension plate to form an opening of the choke chamber, and the first side plate, the second side plate and the second extension plate enclose the choke chamber.

[0013] In one embodiment of the present application, the second side plate is provided with a plurality of notches arranged along the circumference of the shielding cavity.

[0014] In one embodiment of the present application, the wavelength of microwaves 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, satisfying B1+H+0.5B2=λ / 4.

[0015] In one embodiment of the present application, the width B1 of the choke chamber satisfies 10mm≤B1≤20mm.

[0016] In one embodiment of the present application, the end of the second extension plate extends into the choke chamber to form a bent portion;

[0017] And / or, the second extension plate is integrally formed with the shielding cover or the shielding shell, and the first side plate and the second side plate are integrally formed and correspondingly connected to the shielding cover or the shielding shell.

[0018] 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 shell;

[0019] Alternatively, the second choke structure is disposed on the shielding cover, and the first choke structure extends outward from an opening of the shielding cavity.

[0020] In one embodiment of the present application, the opening of the shielding cavity is located at the top of the shielding shell, the shielding cover is located above the shielding shell, and the first choke structure and the second choke structure are arranged along the height direction of the microwave shielding assembly;

[0021] And / or, the shielding cover further includes an upper cover and a surrounding edge, the upper cover is arranged opposite to the shielding cavity, and the surrounding edge is arranged along the circumference of the upper cover.

[0022] The present application also proposes a microwave cooking appliance, comprising an appliance body and a microwave shielding assembly as described in any of the aforementioned embodiments, wherein the appliance body comprises a pot body and a cover body, the pot body is provided with a shielding shell of the microwave shielding assembly, and the cover body is provided with a shielding cover of the microwave shielding assembly.

[0023] The microwave shielding assembly of the utility model is provided with a shielding shell and a shielding cover to enclose a shielding cavity, and the shielding shell and the shielding cover are respectively provided with a first choke structure and a second choke structure, and the first choke structure and the second choke structure are pressed and matched with each other, so that the shielding shell and the shielding cover have a good sealing effect to reduce or prevent the leakage of microwaves outside the shielding cavity. At the same time, a choke cavity is provided in the second choke structure, and the opening of the choke cavity is provided at a position of the second closed end face away from the opening of the shielding cavity, and is provided opposite to the first closed end face; in this way, even if there is a gap between the first closed end face and the second closed end face, which causes partial microwave leakage, the microwave that crosses the second closed end face enters the choke cavity from the opening of the choke cavity and is consumed, so as to avoid the microwave from continuing to leak outward; that is, the microwave shielding assembly provided in the present application has a good choke effect, and can effectively avoid microwave leakage. And because the choke cavity is located on the side of the second closed end face away from the first choke structure, the cross-sectional size of the microwave shielding assembly will not be increased, thereby avoiding the cross-sectional size of the microwave shielding assembly and the microwave cooking utensil from being too large, which is conducive to realizing the miniaturization of the structure of the microwave cooking utensil. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0025] Figure 1 A cross-sectional view of an embodiment of the microwave cooking device of the present application;

[0026] Figure 2 A structural diagram of an embodiment of a microwave cooking device of the present application with the pot body and the cover body removed;

[0027] Figure 3 for Figure 2 A cross-sectional view of a microwave cooking device;

[0028] Figure 4 for Figure 3 The enlarged view of point A in the middle;

[0029] Figure 5 This is an enlarged view of the first choke structure and the second choke structure of another embodiment of the microwave shielding component of the present application.

[0030] Explanation of the reference numerals in the drawings:

[0031] Reference Label Name Reference Label Name 1 Microwave Cooking Appliance 355 Second Side Plate 100 Microwave Shielding Assembly 357 Bending Portion 10 Shielding Case 359 Choking Cavity 11 First Choking Structure 200 Appliance Body 111 First Extension Plate 210 Pot Body 113 Shielding Cavity 220 Inner Pot 30 Shielding Cover 221 Cooking Cavity 31 Upper Cover 230 Cover Body 33 Perimeter 240 Microwave Generation Module 35 Second Choking Structure 250 Waveguide Module 351 Second Extension Plate 251 Top Cover 353 First Side Plate 252 Bottom Cover 3531 Notch 253 Padding Plate 3533 Choking Teeth 260 Electric Control Module

[0032] The realization of the purpose, functional features and advantages of the present utility model will be further described with reference to the embodiments and the accompanying drawings. Specific embodiments

[0033] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0034] It should be noted that all the directional indications (such as up, down, left, right, front, back...) in the embodiments of the present utility model are only used to explain the relative position relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0035] In the present utility model, unless otherwise clearly defined and limited, terms such as "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly limited. 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 situations.

[0036] In addition, the descriptions such as "first" and "second" in the present utility model are only for descriptive purposes, and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present utility model.

[0037] The present utility model provides a microwave shielding assembly 100, which is applied in a microwave cooking appliance 1 and can avoid microwave leakage of the microwave cooking appliance 1.

[0038] With reference toFigures 1 to 5 , in some embodiments of the present application, the microwave shielding assembly 100 includes a shielding case 10 and a shielding cover 30. The shielding case 10 is formed with a shielding cavity 113. 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 arranged to surround the circumference of the shielding cavity 113; the shielding cover 30 is detachably covered on the shielding cavity 113 and is provided with the other of the first choke structure 11 and the second choke structure 35; the first choke structure 11 is provided with a first closed end face, the second choke structure 35 is provided with a second closed end face arranged opposite to the first closed end face, and a choke cavity 359 is formed. At least part of the choke cavity 359 is located on the side of the second closed end face facing away from the first choke structure 11. The opening of the choke cavity 359 is located at one end of the second closed end face away from the opening of the shielding cavity 113 and is arranged opposite to the first closed end face.

[0039] In the embodiments of the present application, at least part of the shielding case 10 is made of a metal material, a metal matrix composite material, or other materials with microwave shielding functions. At least part of the shielding cover 30 is made of a metal material, a metal matrix composite material, or other materials with microwave shielding functions; when the shielding cover 30 is closed on the shielding case 10, the shielding cavity 113 is formed by enclosing the shielding case 10 and the shielding cover 30. When the microwave shielding assembly 100 is applied to the microwave cooking appliance 1, the shielding case 10 and the shielding cover 30 can directly serve as the cooking main body, and the shielding cavity 113 is used to hold food ingredients; alternatively, an inner container 220 can also be provided in the shielding cavity 113, and a cooking cavity 221 is formed in the inner container 220 for holding food ingredients. The microwave generating module 240 in the microwave cooking appliance 1 can generate microwaves and emit the microwaves into the shielding cavity 113 to directly heat the food ingredients in the shielding cavity 113, and the shielding cavity can shield the microwaves. Part of the microwaves can be absorbed by the metal material. When the microwaves pass through the metal, the electric and magnetic fields of the electromagnetic waves act on the free electrons, causing the electrons to vibrate slightly and converting the energy of the microwaves into heat energy. This absorption effect can effectively weaken and eliminate the transmission and radiation of the microwaves. The metal inner wall of the shielding cavity 113 can also reflect and shield the microwaves. The working principle of the metal reflection layer is that when the microwaves encounter the conductive electrons on the surface of the metal material, an inductive coupling effect and an eddy current effect of the current will be generated, resulting in the reflection of the microwaves, deviating the transmission direction of the microwaves and making them propagate along the original direction to achieve the purpose of shielding. Commonly used reflection materials include metal reflection layers, aluminum plates, copper plates, etc.

[0040] Furthermore, a first choke structure 11 and a second choke structure 35 are respectively arranged on the shielding case 10 and the shielding cover 30. The first choke structure 11 and the second choke structure 35 are located outside the opening of the shielding cavity 113 and are both arranged in a circumferential direction around the shielding cavity 113. The first closed end face of the first choke structure 11 is in press contact with the second closed end face of the second choke structure 35 to form a better airtight structure outside the opening of the shielding cavity 113, playing a first shielding role and reducing the outward leakage of microwaves in the shielding cavity 113.

[0041] Meanwhile, the width of the first closed end face is made greater than the width of the second closed end face, and a choke cavity 359 is formed in the second choke structure 35. The choke cavity 359 has an opening opposite to the first closed end face, and the opening of the choke cavity 359 is located on the side of the second closed end face away from the opening of the shielding cavity 113. With such an arrangement, even if there is a gap between the first closed end face and the second closed end face resulting in partial leakage of microwaves in the shielding cavity 113, the leaked microwaves can enter the choke cavity 359 from the opening of the choke cavity 359 and be consumed, that is, the microwaves are shielded again through the choke cavity 359, greatly reducing the microwave leakage amount, improving the choke effect of the microwave shielding assembly 100, and effectively preventing the outward leakage of microwaves. And since the choke cavity 359, the first closed end face, and the second closed end face are arranged along the height direction of the microwave shielding assembly 100, the cross-sectional size of the microwave shielding assembly 100 will not be increased, effectively controlling the volumes of the microwave shielding assembly 100 and the microwave cooking appliance 1 and preventing the volume of the microwave shielding assembly 100 from being too large. Herein, the cross-section of the microwave shielding assembly 100 refers to a section parallel to the plane where the opening of the shielding cavity 113 is located.

[0042] It should be noted that in the embodiment of the present application, the first choke structure 11 can be in a block shape, a plate shape, or other implementable structures, and the second choke structure 35 can be formed by bending and combining sheet metal parts or can be formed by injection molding or other methods.

[0043] Therefore, it can be understood that the microwave shielding assembly 100 of the present application is provided with a shielding shell 10 and a shielding cover 30 to enclose a shielding cavity 113, and the shielding shell 10 and the shielding cover 30 are respectively provided with a first choke structure 11 and a second choke structure 35, and the first choke structure 11 and the second choke structure 35 are pressed and matched with each other, so that there is a good sealing effect between the shielding shell 10 and the shielding cover 30 to reduce or prevent the leakage of microwaves out of the shielding cavity 113. At the same time, a choke cavity 359 is provided in the second choke structure 35, and the opening of the choke cavity 359 is provided at a position of the second closed end face away from the opening of the shielding cavity 113, and is provided opposite to the first closed end face; in this way, even if there is a gap between the first closed end face and the second closed end face, resulting in partial microwave leakage, the microwaves that cross the second closed end face enter the choke cavity 359 from the opening of the choke cavity 359 and are consumed, thereby preventing the microwaves from leaking outward; that is, the microwave shielding assembly 100 provided in the present application has a good choke effect, which can effectively prevent the microwaves from leaking outward. And because the choke cavity 359 is located on the side of the second closed end surface away from the first choke structure 11, the cross-sectional dimension of the microwave shielding assembly 100 will not be increased, thereby avoiding the cross-sectional dimensions of the microwave shielding assembly 100 and the microwave cooking appliance 1 being too large, which is conducive to realizing the miniaturization of the structure of the microwave cooking appliance 1.

[0044] Please refer to Figures 1 to 3 The opening of the shielding cavity 113 is located at the top of the shielding shell 10 , the shielding cover 30 is located above the shielding shell 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 .

[0045] In the 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 cooking rice, porridge, soup and other microwave heating functions. The microwave rice cooker includes a pot body 210 and a cover body 230, and the pot body 210 is formed with a heating cavity with an opening at the top, and the heating cavity can be directly used to hold food, or an inner pot 220 can be set in the heating cavity, and microwaves can pass through the inner pot 220 to heat the food placed in the inner pot. When the microwave shielding assembly 100 is applied to the microwave rice cooker, the shielding shell 10 is arranged in the pot body 210, and the shielding cavity 113 of the shielding shell 10 can be used as a heating cavity, and the shielding cover 30 can be opened and closed to cover the top of the shielding shell 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, wherein the shielding cover 30 can be used as a part of the cover body 230 of the microwave rice cooker, which is convenient for use.

[0046] Please refer to Figure 4 and Figure 5 In some embodiments of the present application, the first choke structure 11 includes a first extension plate 111 , and one side surface of the first extension plate 111 forms a first closed end surface.

[0047] In this embodiment, the first choke structure 11 is set as a plate-like structure, including a first extension plate 111 and a first bending portion 357 connected to each other. At this time, the first choke structure 11 and the shielding cover 30 or the shielding shell 10 can be stamped into shape to improve processing convenience.

[0048] Please refer to Figure 4 and Figure 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, the second extension plate 351 is arranged opposite to the first choke structure 11, the first side plate 353 is arranged on a side of the second extension plate 351 away from the first choke structure 11, and is arranged opposite to the second extension plate 351;

[0049] The second side plate 355 extends from the first side plate 353 in a direction close to the first choke structure 11, and an 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 chamber 359, and the first side plate 353, the second side plate 355 and the second extension plate 351 enclose a choke chamber 359.

[0050] In this embodiment, the second choke structure 35 is set to a plate-like structure, including a second extension plate 351, a first side plate 353 and a second side plate 355 connected thereto, wherein the second extension plate 351 is arranged at the opening position of the shielding cavity 113, and one side surface of the second extension plate 351 forms a second closed end surface for press-fitting with the first closed end surface of the first choke structure 11; the first side plate 353 and the second side plate 355 are connected, and can be formed by bending a sheet metal part, wherein the first side plate 353 is arranged opposite to the second extension plate 351, the second side plate 355 extends from one end of the first side plate 353 toward the direction of the second extension plate 351, and the second side plate 355 is spaced apart from the second extension plate 351 at one end away from the first side plate 353, so as to form a choke cavity 359 between the first side plate 353, the second side plate 355 and the second extension plate 351, and to form an opening of the choke cavity 359 between the second side plate 355 and the second extension plate 351. It should be noted that a third side plate can be provided at the end of the first side plate 353 away from the second side plate 355 for connecting the first side plate 353 and the second extension plate 351 to close the choke chamber 359; or the end of the first side plate 353 away from the second side plate 355 can be extended to the edge 33 of the shielding cover 30 or the side wall of the shielding shell 10, so that the first side plate 353, the second side plate 355, the second extension plate 351 and the edge 33 of the shielding cover 30 or the side wall of the shielding shell 10 form a choke chamber 359, which is not limited here.

[0051] Please refer to Figure 2, in some embodiments of the present application, a plurality of notches 3531 arranged circumferentially along the shielding cavity 113 are formed in the second side plate 355. With such an arrangement, the second side plate 355 includes a plurality of choke teeth 3533 arranged at intervals circumferentially along the shielding cavity 113, and the setting of the notches 3531 enables the microwave shielding choke structure to have a good shielding effect on microwaves within a certain frequency range. Among them, the width range of the notches 3531 can be set as required, and the distances between the notches 3531 between adjacent choke teeth 3533 can be set to be the same or different.

[0052] Please refer to Figure 4 and Figure 5 , in some embodiments of the present application, the end of the second extension plate 351 extends into the choke cavity 359 to form a bent portion 357. With such an arrangement, the bent portion 357 can be used to improve the structural strength of the second extension plate 351, reduce the risk of deformation of the second extension plate 351, improve the flatness of the second closed end face on the second extension plate 351, so that a good pressing contact fit can be achieved between the first choke structure 11 and the second extension plate 351, and reduce microwave leakage.

[0053] Please refer to Figure 4 and Figure 5 , in some embodiments of the present application, the microwave wavelength in the shielding cavity 113 is λ, the width of the choke cavity 359 is B1, the width of the second extension plate 351 is B2, and the height of the choke cavity 359 is H, satisfying B1 + H + 0.5B2 = λ / 4. With such an arrangement, that is, the distance from the opening of the choke cavity 359 to the short-circuit plane in the cavity is λ / 4, which has the effect of guiding the microwave to reverse the phase, so as to form a very high impedance at the opening of the choke cavity 359; the microwave will be canceled by its reverse reflected wave at the opening of the choke cavity 359, that is, the microwave passing through between the first closed end face and the second closed end face is blocked at the opening of the choke cavity 359, effectively preventing microwave leakage.

[0054] In some embodiments of the present application, the width B1 of the choke cavity 359 satisfies 10 mm ≤ B1 ≤ 20 mm.

[0055] Among them, B1 can take values of 10 mm, 12 mm, 15 mm, 17 mm, 18 mm, 20 mm, and any value between 10 mm and 20 mm, which is not limited herein. If B1 < 10 mm, the choke effect of the second choke structure 35 on microwaves decreases, and the microwave leakage increases; if B1 > 20 mm, at this time, the size of the microwave shielding component 100 in the width direction is larger, and the volume of the microwave shielding component 100 is larger, which is not conducive to the miniaturization development of the microwave cooking appliance 1. By limiting the width B1 of the choke cavity 359 to be between 10 mm and 20 mm, the microwave shielding component 100 can not only have a good microwave shielding effect, but also has a relatively small overall structure volume.

[0056] Please refer to Figure 3 and Figure 4 The second extension plate 351 is integrally formed with the shielding cover 30 or the shielding case 10, and the first side plate 353 and the second side plate 355 are integrally formed and correspondingly connected to the shielding cover 30 or the shielding case 10.

[0057] In the embodiments of the present application, the first choke structure 11 and the second choke structure 35 are respectively disposed on the shielding case 10 and the shielding cover 30, that is, the second choke structure 35 can be disposed on the shielding case 11 or the shielding cover 30. Among them, the second extension plate 351 of the second choke structure 35 can be integrally formed with the shielding case 11 or the shielding cover 30, and the first side plate 353 and the second side plate 355 in the second choke structure 35 are integrally formed, for example, formed by bending a material such as a sheet metal part, and then integrally connected to the shielding case 10 or the shielding cover 30 provided with the second extension plate 351 to improve the processing convenience of the microwave shielding assembly 100. For example, the second extension plate 351 can be integrally formed with the shielding cover 30, and the structure formed by combining the first side plate 353 and the second side plate 355 is connected to the shielding cover 30, as shown in the following embodiments.

[0058] In some embodiments, the first choke structure 11 can also be integrally formed with the shielding case 10 or the shielding cover 30 to improve the processing convenience.

[0059] With reference to Figure 3 and Figure 4 In some embodiments of the present application, the shielding cover 30 further includes an upper cover 31 and a surrounding edge 33. The upper cover 31 is disposed opposite to the shielding cavity 113, and the surrounding edge 33 is disposed around the circumference of the upper cover 31.

[0060] In this embodiment, the shielding cover 30 includes a connected upper cover 31 and a surrounding edge 33. The surrounding edge 33 is disposed around the circumference of the upper cover 31. The surrounding edge 33 and the upper cover 31 enclose an accommodation space, and a first extension plate 111 or a second extension plate 351 extends outward from the accommodation space at one end of the surrounding edge 33 away from the upper cover 31; thus configured, the structural stability of the shielding cover 30 can be improved, and the risk of deformation of the shielding cover 30 can be reduced. In some embodiments, the first choke structure 11 is a plate-like structure and is disposed on the cover body 230, or the second choke structure 35 is provided with a second extension plate 351; at this time, the shielding cover 30 is set as a combined structure of the upper cover 31 and the surrounding edge 33, which can ensure the flatness of the first extension plate 111 or the second extension plate 351 disposed on the shielding cover 30, so that the first closed end face and the second closed end face can be better pressed and fitted, reducing the gap between the first closed end face and the second closed end face and reducing microwave leakage.

[0061] 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 first side plate 353 is disposed opposite to the second extension plate 351, and one end of the first side plate 353 away from the second side plate 355 can extend to be connected to the peripheral edge 33 of the shielding cover 30 and the peripheral edge 33 or the upper cover 31, so that the first side plate 353, the second side plate 355, the second extension plate 351, and the peripheral edge 33 of the shielding cover 30 enclose to form a choke cavity 359.

[0062] Please refer to Figure 3 and Figure 4 , in some embodiments of the present application, the second choke structure 35 is disposed on the shielding cover 30. With such an arrangement, the choke cavity 359 is located above the first choke structure 11, and the volume of the microwave shielding component 100 can also be prevented from being too large. Additionally, in some embodiments, the shielding cover 30 includes an upper cover 31 and a peripheral edge 33. The second extension plate 351 is disposed at one end of the peripheral edge 33 away from the upper cover 31, and one end of the second side plate 355 away from the first side plate 353 can be connected to the peripheral edge 33 or can extend to be connected to the upper cover 31 and the upper cover 31.

[0063] Please refer to Figure 5 , in some embodiments of the present application, the second choke structure 35 is disposed on the shielding case 10. With such an arrangement, the choke cavity 359 is located below the first choke structure 11, and the volume of the microwave shielding component 100 can also be prevented from being too large.

[0064] 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 extends outward from the opening edge of the shielding cavity 113. The first side plate 353 is disposed opposite to the second extension plate 351, and one end of the first side plate 353 is connected to the side wall of the shielding case 10. The second side plate 355 extends from the end of the first side plate 353 away from the side wall of the shielding case 10 towards the second extension plate 351, 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. 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 enclose to form a choke cavity 359.

[0065] Please refer to Figures 1 to 3, the present application also provides a microwave cooking appliance 1, which can be a microwave oven, a microwave rice cooker, and other cooking devices that use microwaves for heating; the microwave cooking appliance 1 includes an appliance main body 200 and a microwave shielding assembly 100 as described in any of the foregoing embodiments. The appliance main body 200 includes a pot body 210 and a lid body 230. The shielding case 10 of the microwave shielding assembly 100 is disposed in the pot body 210. Among them, the shielding cavity 113 of the shielding case 10 can be used as the cooking cavity 221, or an inner container 220 can be provided in the shielding cavity 113, and the cooking cavity 221 is formed in the inner container 220; the shielding cover 30 of the microwave shielding assembly 100 is disposed on the lid body 230. When the lid body 230 is closed on the pot body 210 to close the cooking cavity 221, the shielding cover 30 is closed on the shielding case 10.

[0066] In some embodiments, when the microwave cooking appliance 1 is a microwave rice cooker, a steam valve can be provided on the lid body 230. When the steam valve is opened, it can communicate the cooking cavity 221 with the external space, discharge steam and other gases, keep the air pressure in the cooking cavity 221 stable, and prevent the pressure in the cooking cavity 221 from being too high.

[0067] Furthermore, in some embodiments, the microwave cooking appliance 1 further includes a microwave generating module 240, a waveguide module 250, an electronic control module 260, and other structures. 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 waveguide module 250 can transmit the microwaves into the cooking cavity 221.

[0068] In some embodiments, the microwave generating module 240 is disposed on one side of the shielding case 10. The waveguide module 250 includes a top cover 251 and a bottom cover 252 that are oppositely arranged to enclose a waveguide channel. The top cover 251 is provided with a microwave outlet and a microwave inlet for inserting the antenna cap of the microwave generating module 240; both the shielding case 10 and the microwave generating module 240 are disposed above the top cover 251 and are connected through the waveguide channel, so that the microwaves generated by the microwave generating module 240 enter the shielding cavity 113 through the waveguide channel; in addition, the waveguide module 250 can further include a backing plate 253, and the backing plate 253 disposed in the shielding cavity 113 can be used to support the inner container 220.

[0069] Since the microwave cooking appliance 1 proposed in the present application applies all the technical solutions of the foregoing all embodiments, it has at least all the beneficial effects brought by the foregoing all technical solutions, which will not be elaborated herein one by one.

[0070] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structural transformation made under the inventive concept of the present invention by using the content of the specification and drawings of the present invention, or directly / indirectly applied in other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. A microwave shielding component, characterized in that, Comprising: A shielding case, a shielding cavity is formed in the shielding case, one of a first choke structure and a second choke structure is provided outside the opening of the shielding cavity, and both the first choke structure and the second choke structure are arranged to surround the circumference of the shielding cavity; A shielding cover, the shielding cover is detachably covered on the shielding cavity, and the other of the first choke structure and the second choke structure is provided; The first choke structure is provided with a first closed end face, the second choke structure is provided with a second closed end face opposite to the first closed end face, the second choke structure forms a choke cavity, at least part of the choke cavity is located on the side of the second closed end face away from the first choke structure, the opening of the choke cavity is located at one end of the second closed end face away from the opening of the shielding cavity and is opposite to the first closed end face.

2. The microwave shielding component according to claim 1, wherein, The first choke structure includes a first extension plate, and one side surface of the first extension plate forms the first closed end face.

3. The microwave shielding component according to claim 1, wherein, The second choke structure includes: A second extension plate, the second extension plate is arranged opposite to the first choke structure; A first side plate, the first side plate is arranged on the side of the second extension plate away from the first choke structure and is arranged opposite to the second extension plate; and A second side plate, the second side plate extends from the first side plate towards the direction close to the first choke structure, and one end of the second side plate away from the first side plate is spaced from the second extension plate to form the opening of the choke cavity, and the first side plate, the second side plate and the second extension plate enclose to form the choke cavity.

4. The microwave shielding component according to claim 3, characterized in that, A plurality of notches arranged along the circumference of the shielding cavity are formed in the second side plate.

5. The microwave shielding component according to claim 3, wherein The microwave wavelength 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, satisfying B1 + H + 0.5B2 = λ / 4.

6. The microwave shielding component according to claim 5, characterized in that, The width B1 of the choke cavity satisfies 10mm ≤ B1 ≤ 20mm.

7. The microwave shielding component according to claim 3, wherein An end portion 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.

8. The microwave shielding component according to any one of claims 1 to 7, wherein The first choke structure is arranged on the shielding cover, and the second choke structure is arranged on the shielding case; Or, the second choke structure is arranged on the shielding cover, and the first choke structure extends outwards from the opening of the shielding cavity.

9. The microwave shielding component according to any one of claims 1 to 7, characterized in that, The opening of the shielding cavity is located at the top 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 the height direction of the microwave shielding assembly; And / or, the shielding cover further includes an upper cover and a surrounding edge, the upper cover is arranged opposite to the shielding cavity, and the surrounding edge is arranged to surround the circumference of the upper cover.

10. A microwave cooking appliance, characterized in that, Comprising an appliance main body and the microwave shielding assembly according to any one of claims 1 to 9, the appliance main body includes a cooking pot body and a cover body, the cooking pot body is provided with the shielding case of the microwave shielding assembly, and the cover body is provided with the shielding cover of the microwave shielding assembly.

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