Door assembly and microwave cooking utensil

Abstract

The invention discloses a door assembly and a microwave cooking utensil, the door assembly comprises a door frame with a first side surface, the first side surface is used for facing a box body of the microwave cooking utensil, the door frame is provided with a choke part on the first side surface, the choke part comprises a choke plate and a plurality of choke teeth, the choke plate is connected to the edge of the door frame and surrounds the door frame by a circle, and the choke teeth are arranged on the choke plate. The choke plate extends towards the direction of the first side face, the multiple choke teeth are connected to the end, away from the first side face, of the choke plate, the multiple choke teeth are arranged at intervals in the circumferential direction of the door frame, each choke tooth comprises multiple plate bodies, the multiple plate bodies are sequentially connected, every two adjacent plate bodies intersect, and the multiple choke teeth are arranged in the circumferential direction of the door frame. The edge of at least one plate body is of a step structure. The edge of at least one of the multiple plate bodies of the choke teeth is arranged to be of the stepped structure, when microwaves reach the positions of the choke teeth, the propagation path of the microwaves can be prolonged, the filtering effect of the microwaves can be improved, and due to the arrangement of the choke teeth, the opening size of the cooking cavity is increased.

Description

Technical Field

[0001] The present invention relates to the technical field of household appliances, and in particular to a door assembly. The present invention also relates to a microwave cooking appliance. Background Art

[0002] This section merely provides background information related to the present disclosure and is not necessarily prior art.

[0003] Microwave cooking appliances (such as microwave ovens) generally include a housing, a door assembly, and a microwave generator. The door assembly is pivotally connected to the housing to open or close a cooking cavity on the housing. The microwave generator sends microwaves into the cooking cavity to cook food in the cooking cavity.

[0004] A choke structure is provided on the door frame of the door assembly. When the door assembly is closed relative to the box body, the choke structure is close to the front plate of the box body and is located outside the opening of the cooking cavity, thereby preventing microwaves in the cooking cavity from leaking. The appearance size of the microwave cooking appliance is relatively fixed, and the size of the choke structure is also relatively fixed, resulting in a limited opening size of the cooking cavity, which is not conducive to the user observing the cooking status in the cooking cavity through the door assembly during the cooking process, thereby reducing the user's experience. Summary of the invention

[0005] The purpose of the present invention is to at least solve the problem of how to increase the opening size of the cooking cavity. This purpose is achieved through the following technical solutions:

[0006] A first aspect of the present invention provides a door assembly for a microwave cooking appliance, the door assembly comprising a door frame having a first side surface, the first side surface being used to face a box body of the microwave cooking appliance, the door frame being provided with a choke portion on the first side surface, the choke portion comprising a choke plate and a plurality of choke teeth, the choke plate being connected to an edge of the door frame and surrounding a circumference of the door frame, the choke plate extending in the direction of the first side surface, the plurality of choke teeth being respectively connected to an end of the choke plate away from the first side surface, and the plurality of choke teeth being spaced apart along the circumference of the door frame, the choke teeth comprising a plurality of plate bodies, the plurality of plate bodies being connected in sequence, and two adjacent plate bodies being intersectingly arranged, and an edge of at least one of the plate bodies being a stepped structure.

[0007] According to the door assembly of the present invention, when the door assembly is used for a microwave cooking appliance, the door assembly is pivotally connected to the box body of the microwave cooking appliance through a door frame, and the cooking cavity in the box body is opened or closed by opening and closing the door assembly. When the door assembly is in a closed state, the choke part is arranged at the gap position between the box body and the door assembly and is used to block the microwaves escaping from the cooking cavity. The edge of at least one of the multiple plates of the choke tooth is arranged in a stepped structure. When the microwave reaches the position of the choke tooth, the propagation path of the microwave can be extended, so that the filtering effect of the microwave can be improved. At the same time, through the setting of the choke tooth, the opening size of the cooking cavity can be effectively increased on the basis of reducing microwave leakage, thereby meeting the user's usage requirements and improving the user's usage experience.

[0008] In addition, the door assembly according to the present invention may also have the following additional technical features:

[0009] In some embodiments of the present invention, the door frame is further provided with a convex ring portion on the first side surface, the convex ring portion is arranged on the inner side of the choke portion and surrounds the door frame, and the convex ring portion is spaced apart from the choke portion to form a choke groove.

[0010] In some embodiments of the present invention, the plurality of plates include:

[0011] a first plate, one end of which is connected to the choke plate and is coplanar with the choke plate;

[0012] A second plate, the second plate is located on a side of the first plate facing the convex ring portion, the second plate is a T-shaped plate, and in a direction perpendicular to the first plate, the T-shaped plate has a first end and a second end oppositely arranged, the first end is vertically connected to the other end of the first plate, and the second end is arranged close to the convex ring portion, and in a direction within the plate surface of the T-shaped plate and parallel to the first plate, the size of the first end is smaller than the size of the second end.

[0013] In some embodiments of the present invention, the choke tooth comprises:

[0014] a first plate, one end of which is connected to the choke plate and is coplanar with the choke plate;

[0015] The second plate is located on the side of the first plate facing the convex ring portion, the second plate is a T-shaped plate, the small end of the T-shaped plate is vertically connected to the other end of the first plate, and the large end of the T-shaped plate is arranged close to the convex ring portion.

[0016] In some embodiments of the present invention, at least part of the second plates of the choke teeth are provided with through holes, and the through holes include one of circular holes, square holes, elliptical holes, triangular holes and diamond holes.

[0017] In some embodiments of the present invention, the through hole is a square hole having a first side length S1 and a second side length S2, 2mm≤S1≤4mm, 2mm≤S2≤4mm.

[0018] In some embodiments of the present invention, a flange portion is provided on the second end of the T-shaped plate, the flange portion and the first plate are located on the same side of the T-shaped plate, and the flange portion is parallel to the first plate.

[0019] In some embodiments of the present invention, the flange portion has an extension dimension in a direction perpendicular to the T-shaped plate, and the extension dimension is L4, wherein 3mm≤L4≤5mm.

[0020] In some embodiments of the present invention, the T-shaped plate includes a first rectangular portion and a second rectangular portion, the first rectangular portion is connected to the first plate and is arranged coplanarly with the second rectangular portion, in the plane where the first rectangular portion and the second rectangular portion are located, and in a direction perpendicular to the arrangement direction of the first rectangular portion and the second rectangular portion, the first rectangular portion has a first size, the first size is T1, and the second rectangular portion has a second size, the second size is T2, wherein T2>T1, and (T2-T1) / 2=b, 1mm≤b≤1.8mm.

[0021] In some embodiments of the present invention, in the arrangement direction of the first rectangular portion and the second rectangular portion, the first rectangular portion has a third size, which is T3, and the second rectangular portion has a fourth size, which is T4, wherein T3≥T4.

[0022] In some embodiments of the present invention, in a direction perpendicular to the choke plate, the choke tooth has a first preset size, the first preset size is L1, wherein 8 mm ≤ L1 ≤ 12 mm;

[0023] and / or, in the protruding direction of the protruding ring portion, the choke plate has a second preset size, the second preset size is L2, wherein 6 mm ≤ L2 ≤ 9 mm;

[0024] And / or, in the protruding direction of the protruding ring portion, the choke tooth has a third preset size, and the third preset size is L3, wherein 10mm≤L3≤13mm.

[0025] In some embodiments of the present invention, the door frame has a hollow area, the hollow area is located on the inner side of the convex ring portion, the door assembly further includes a shell, a door seal and a light-transmitting plate, the shell is provided with a receiving groove, the choke portion is accommodated in the receiving groove, the convex ring portion is arranged on the outer side of the receiving groove, the door seal cooperates with the shell in a detachable manner to close the opening of the receiving groove, and the light-transmitting plate is mounted on the shell and closes the hollow area;

[0026] And / or, a convex rib structure is provided on the side of the front plate of the convex ring portion facing the box body, and the convex rib structure surrounds the door frame and is used to extend into the cooking cavity of the box body.

[0027] A second aspect of the present invention provides a microwave cooking appliance, the microwave cooking appliance comprising:

[0028] A box body, the box body comprising a front plate and a cooking cavity, an opening of the cooking cavity is arranged on the front plate, and the cooking cavity is communicated with the outside through the opening;

[0029] According to the door assembly as described above, the door frame of the door assembly is pivotally connected to the front plate to open or close the cooking cavity.

[0030] According to the microwave cooking appliance of the present invention, the door assembly is pivotally connected to the box body of the microwave cooking appliance through a door frame, and the cooking cavity in the box body is opened or closed by opening and closing the door assembly. When the door assembly is in a closed state, the choke part is arranged at the gap position between the box body and the door assembly and is used to block the microwaves escaping from the cooking cavity. The edge of at least one of the multiple plates of the choke tooth is arranged in a stepped structure. When the microwave reaches the position of the choke tooth, the propagation path of the microwave can be extended, so that the filtering effect of the microwave can be improved. At the same time, through the setting of the choke tooth, the opening size of the cooking cavity can be effectively increased on the basis of reducing microwave leakage, thereby meeting the user's usage requirements and improving the user's usage experience.

[0031] In addition, the microwave cooking device according to the present invention may also have the following additional technical features:

[0032] In some embodiments of the present invention, the minimum distance between the opening and the outer edge of the front plate is a, wherein 20 mm ≤ a ≤ 30 mm. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present invention. Moreover, the same reference numerals are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0034] Figure 1 The structure diagram of the microwave cooking device according to the embodiment of the present invention is schematically shown;

[0035] Figure 2 for Figure 1 A partial structural schematic diagram of a microwave cooking device shown in ;

[0036] Figure 3 for Figure 2 A schematic diagram of the enlarged structure of the microwave cooking device shown in FIG.

[0037] Figure 4 for Figure 2 A schematic structural diagram of a cabinet of a microwave cooking appliance shown in ;

[0038] Figure 5 for Figure 1 An exploded structural diagram of a door assembly of a microwave cooking appliance shown in ;

[0039] Figure 6 for Figure 5 Schematic diagram of partial structures of some embodiments of door frames shown in ;

[0040] Figure 7 for Figure 6 Schematic diagram of the enlarged structure of part B of the structure shown in

[0041] Figure 8 for Figure 6 A cross-sectional view of a door frame shown in ;

[0042] Fig. 9 for Figure 8 A schematic diagram of the enlarged structure of part C of the structure shown in FIG.

[0043] Fig.10 for Figure 6 A schematic diagram of a partial structure of the door frame from another perspective shown in FIG.

[0044] Fig.11 for Figure 5 Schematic diagram of partial structures of some embodiments of door frames shown in ;

[0045] Fig.12 for Figure 5 Schematic diagram of partial structures of some embodiments of door frames shown in ;

[0046] Fig.13 for Fig.12 A schematic diagram of a partial structure of the door frame from another perspective shown in FIG.

[0047] Fig.14 for Figure 5Schematic diagram of the partial structure of some embodiments of the door frame shown in FIG.

[0048] The reference numerals are as follows:

[0049] 100. Microwave cooking utensils;

[0050] 10. Box body;

[0051] 11. Front panel;

[0052] 12. Cooking chamber;

[0053] 20. Door assembly;

[0054] 201, door frame;

[0055] 21. Projection ring part;

[0056] 211, convex rib structure;

[0057] 22. Choke unit;

[0058] 221, choke plate; 222, choke tooth; 2221, first plate; 2222, second plate; 22221, first rectangular portion; 22222, second rectangular portion; 22223, flange portion; 22224, through hole;

[0059] 23. Choke slot;

[0060] 202, shell;

[0061] 203, light-transmitting plate;

[0062] 204, door seal;

[0063] 205. Sealing ring. DETAILED DESCRIPTION

[0064] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0065] It should be understood that the terms used herein are only for the purpose of describing specific example embodiments and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "one", "an" and "said" as used herein may also be meant to include plural forms. The terms "include", "comprise", "contain", and "have" are inclusive, and therefore specify the existence of stated features, steps, operations, elements and / or parts, but do not exclude the existence or addition of one or more other features, steps, operations, elements, parts, and / or combinations thereof. The method steps, processes, and operations described herein are not interpreted as necessarily requiring them to be performed in the specific order described or illustrated, unless the execution order is clearly indicated. It should also be understood that additional or alternative steps may be used.

[0066] Although the terms first, second, third, etc. can be used in the text to describe multiple elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can only be used to distinguish an element, component, region, layer or section from another region, layer or section. Unless the context clearly indicates, terms such as "first", "second" and other numerical terms do not imply order or sequence when used in the text. Therefore, the first element, component, region, layer or section discussed below can be referred to as the second element, component, region, layer or section without departing from the teaching of the example embodiments.

[0067] For ease of description, spatial relative terms may be used herein to describe the relationship of one element or feature relative to another element or feature as shown in the figure, such as "inside", "outside", "inner side", "outer side", "below", "below", "above", "above", etc. Such spatial relative terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the figure. For example, if the device in the figure is turned over, then the elements described as "below other elements or features" or "below other elements or features" will subsequently be oriented as "above other elements or features" or "above other elements or features". Therefore, the example term "below..." can include both upper and lower orientations. The device can be oriented otherwise (rotated 90 degrees or in other directions) and the spatial relative descriptors used in the text are interpreted accordingly.

[0068] like Figures 1 to 14As shown, according to an embodiment of the present invention, a door assembly 20 for a microwave cooking appliance 100 is proposed, the door assembly 20 includes a door frame 201 having a first side surface, the first side surface is used to face the box body 10 of the microwave cooking appliance 100, the door frame 201 is provided with a choke portion 22 on the first side surface, the choke portion 22 includes a choke plate 221 and a plurality of choke teeth 222, the choke plate 221 is connected to the edge of the door frame 201 and surrounds a circle of the door frame 201, the choke plate 221 is extended in the direction of the first side surface, the plurality of choke teeth 222 are respectively connected to one end of the choke plate 221 away from the first side surface, and the plurality of choke teeth 222 are spaced apart along the circumference of the door frame 201, the choke teeth 222 include a plurality of plate bodies, the plurality of plate bodies are connected in sequence, and two adjacent plate bodies are arranged to intersect, and the edge of at least one plate body is a stepped structure.

[0069] When the door assembly is used for the microwave cooking device 100, the door assembly 20 is pivotally connected to the box body 10 of the microwave cooking device 100 through the door frame 201, and the cooking cavity 12 in the box body 100 is opened or closed by opening and closing the door assembly 20. When the door assembly 20 is in a closed state, the choke part 22 is arranged at the gap position between the box body 10 and the door assembly 20 and is used to block the microwaves escaping from the cooking cavity 12. The edge of at least one of the multiple plates of the choke tooth 222 is arranged in a stepped structure. When the microwave reaches the position of the choke tooth 222, the propagation path of the microwave can be extended, so that the filtering effect of the microwave can be improved. At the same time, by setting the choke tooth 222, the opening size of the cooking cavity 12 can be effectively increased on the basis of reducing microwave leakage, thereby meeting the user's usage requirements and improving the user's usage experience.

[0070] In some embodiments of the present invention, the door frame 201 is further provided with a convex ring portion 21 on the first side surface. The convex ring portion 21 is arranged on the inner side of the choke portion 22 and surrounds the door frame 201. The convex ring portion 21 is spaced apart from the choke portion 22 and forms a choke groove 23.

[0071] Specifically, the door frame 201 has a hollow area, and the hollow area is located in the middle area of ​​the door frame 201, the raised ring portion 21 is located on the circumferential outside of the hollow area and is arranged around the hollow area, the choke portion 22 is arranged on the circumferential outside of the raised ring portion 21 and is arranged circumferentially around the raised ring portion 21, and the choke portion 22 is spaced between the outer edge of the raised ring portion 21 and the edge of the door frame 201. When the door assembly 20 is used in the microwave cooking apparatus 100, the door assembly 20 is pivotally connected to the housing 10 of the microwave cooking apparatus 100 through the door frame 201, and the cooking cavity 12 in the housing 10 is opened or closed by opening and closing the door assembly 20. When the door assembly 20 is in a closed state, the convex ring portion 21 of the door frame 201 abuts against the housing 10 or is spaced from the housing 10 (with a small gap between the two), and the inner edge of the convex ring portion 21 is aligned with or staggered with the opening of the cooking cavity 12. The choke portion 22 is located on the door frame 201 and is located between the outer edge of the convex ring portion 21 and the outer edge of the door frame 201. By providing the convex ring portion 21, the gap between the door assembly 20 and the housing 10 can be reduced, and the convex ring portion 21 can be used to block microwaves, thereby further reducing microwave leakage.

[0072] It should be understood that the hollow area is arranged through the door frame 201, wherein one end of the hollow area is arranged facing the cooking cavity 12, and the other end of the hollow area is arranged facing the user, and the user can view the inside of the cooking cavity 12 through the hollow area, so as to obtain the cooking status in the cooking cavity 12 in real time. The convex ring part 21 is arranged around the circumference of the hollow area, and the choke part 22 is arranged around the circumference of the convex ring part 21. The choke part 22 and the convex ring part 21 are arranged at intervals and form a choke groove 23, that is, the choke groove 23 is formed between the convex ring part 21 and the choke part 22. When microwaves leak from the abutting position between the convex ring part 21 and the box body 10, the leaked microwaves enter the choke groove 23, and the choke part 22 is used to block the microwaves, thereby effectively reducing the leakage of microwaves, so that the user's safety is improved.

[0073] In addition, the convex ring portion 21 is arranged close to the edge of the frame, and the convex ring portion 21 has a size in the spacing direction between the convex ring portion 21 and the central control area, and the size is usually a fixed size. When the outer edge of the convex ring portion 21 moves outward toward the edge of the door frame 201, the inner edge of the convex ring portion 21 also moves outward to one side of the edge of the door frame 201, that is, the convex ring portion 21 as a whole moves outward relative to the edge of the door frame 201. Therefore, by setting the size of the outer edge of the convex ring portion 21 and the edge of the door frame 201, the convex ring portion 21 and the choke portion 22 as a whole can be moved outward relative to the opening of the cooking cavity 12, thereby increasing the opening size of the cooking cavity 12, so that the opening size of the cooking cavity 12 can meet the user's usage requirements.

[0074] In addition, in the present invention, the door frame 201 is a metal part, which is integrally formed by stamping, so that the convex ring portion 21 and the choke portion 22 are simultaneously formed on the door frame 201. This manufacturing method is convenient to process and effectively reduces the manufacturing cost of the product, thereby facilitating the promotion and popularization of the product.

[0075] In some embodiments of the present invention, Figures 6 to 14 As shown, the choke unit 22 includes a choke plate 221 and a choke tooth 222 , and the number of the choke teeth 222 is multiple.

[0076] Among them, the choke plate 221 is connected and fixed on the side of the door frame 201 facing the box body 10, the choke plate 221 is arranged on the outer side of the convex ring part 21 and is arranged around the convex ring part 21, the choke plate 221 and the convex ring part 21 are spaced apart, all the choke teeth 222 are respectively connected to one end of the choke plate 221 facing the box body 10, and all the choke teeth 222 are spaced apart along the circumferential direction of the convex ring part 21, and at the same time, all the choke teeth 222 are spaced apart from the convex ring part 21.

[0077] Specifically, a plurality of choke teeth 222 are provided, and all of the choke teeth 222 are spaced apart along the circumference of the convex ring portion 21, so that the circumference of the convex ring portion 21 has a choke structure, which further reduces the leakage of microwaves from the abutment position between the convex ring portion 21 and the box body 10, thereby further improving the safety of users when using the microwave cooking appliance 100.

[0078] It should be understood that the spacing distance between two adjacent choke teeth 222 is less than a quarter wavelength of the microwave, thereby reducing the leakage of microwaves from between two adjacent choke teeth 222, thereby further improving the overall safety of the microwave cooking device 100.

[0079] In addition, when microwaves leak from between the abutment position of the convex ring portion 21 and the housing 10, the leaked microwaves enter the choke groove 23 between the choke portion 22 and the convex ring portion 21, and the microwaves are confined in the choke groove 23, thereby reducing microwave leakage.

[0080] It should be pointed out that the choke plate 221 is a plate-shaped member and is arranged along the protruding direction of the convex ring portion 21. One end of the choke plate 221 is vertically connected to the door frame 201, and the other end is connected to the choke tooth 222. The choke plate 221 and the convex ring portion 21 are spaced apart, and the choke tooth 222 is located in the space between the choke plate 221 and the convex ring portion 21.

[0081] In some embodiments of the present invention, Figures 9 to 11 , Figure 13 to Figure 14As shown, the choke tooth 222 includes a first plate 2221 and a second plate 2222 . The first plate 2221 is coplanar with the choke plate 221 and connected to the choke plate 221 . The second plate 2222 is connected to the first plate 2221 and is located on the side of the first plate 2221 facing the convex ring portion 21 .

[0082] Among them, Figures 10 to 14 As shown, the second plate 2222 is configured as a T-shaped plate, the T-shaped plate has a large end and a small end, one end of the first plate 2221 is connected to the choke plate 221, and the other end of the first plate 2221 is vertically connected to the small end of the T-shaped plate, and the large end of the T-shaped plate extends to one side of the convex ring portion 21 and is arranged close to the convex ring portion 21.

[0083] Specifically, the large end of the T-shaped plate is spaced apart from the convex ring portion 21 to form a choke groove 23 therebetween. The size of the choke groove 23 is a set value (the size of the choke groove 23 in the spacing direction between the choke tooth 222 and the convex ring structure is less than or equal to one quarter of the wavelength of the microwave). When the convex ring portion 21 moves outward toward the edge of the door frame 201, the choke portion 22 also moves outward toward the edge of the door frame 201. This can effectively increase the opening size of the cooking cavity 12 while reducing microwave leakage, thereby meeting the user's usage requirements.

[0084] It should be understood that in the present invention, the choke part 22 forms a structure of an LC filter circuit, wherein the choke plate 221 connects all the choke teeth 222, thereby being able to short-circuit all the choke teeth 222, and by setting the second plate 2222 of the choke tooth 222 to a T-shaped plate, the resonant frequency of the equivalent LC filter circuit formed by the choke tooth 222 can be adjusted, thereby achieving a more effective filtering effect.

[0085] In some embodiments of the present invention, Figures 10 to 14 As shown, the multiple plate bodies of the choke tooth 222 include a first plate 2221 and a second plate 2222 that are connected, the second plate 2222 is configured as a T-shaped plate, and a through hole 22224 is opened on the second plate 2222, wherein the through hole 22224 is in the shape of a square hole, a round hole, a triangular hole, a diamond hole or an elliptical hole.

[0086] Specifically, the through hole 22224 is opened on the second plate 2222, and the through hole 22224 is arranged in the middle area of ​​the second plate 2222. By setting the through hole 22224, the structure of the second plate 2222 is changed, so that the size of the equivalent inductance L can be changed, and the LC equivalent circuit frequency can also be adjusted to achieve effective filtering.

[0087] It should be noted that, in the embodiment of the present invention, the number of the choke teeth 222 is multiple, and the second plate 2222 of some of the choke teeth 222 may be provided with a through hole 22224 (such as Fig.14 As shown), the second plates 2222 of all choke teeth 222 may also be provided with through holes 22224 (as shown Figures 11 to 13 As shown in Figure 11 to Figure 12 As shown, when a through hole 22224 is provided on the second plate 2222 of some choke teeth 222, the second plates 2222 with the through hole 22224 and the second plates 2222 without the through hole 22224 are alternately arranged, thereby improving the shielding effect of microwaves, further reducing microwave leakage, and further improving the safety of the microwave cooking device 100 during use.

[0088] In addition, the type of the through hole 22224 can be adaptively set according to needs, and the size of the through hole 22224 also needs to be set accordingly according to specific needs.

[0089] In some embodiments of the present invention, Figures 10 to 14 As shown, the choke portion 22 includes a choke plate 221 and a plurality of choke teeth 222 connected to the choke plate 221, wherein the choke teeth 222 include a first plate 2221 and a second plate 2222, the choke plate 221 is vertically connected to the door frame 201, the first plate 2221 is connected to the choke plate 221 and the two are coplanarly arranged, the second plate 2222 is vertically connected to the first plate 2221, and the second plate 2222 is extended to one side of the convex ring portion 21, and at this time, the choke plate 221, the first plate 2221 and the second plate 2222 are in an L-shaped structure.

[0090] Among them, Fig.12 As shown, a through hole 22224 is opened on the second plate 2222, and the through hole 22224 is configured to be a square hole, wherein the square hole is a rectangle, and the four sides of the rectangle are equal to each other, and the length of one group of sides is a first side length, and the first side length is defined as S1, and the value of S1 is between 2mm and 4mm, and the length of the other group of sides is a second side length, and the second side length is defined as S2, and the value of S2 is between 2mm and 4mm.

[0091] When S1 is less than 2 mm, the through hole 22224 has little effect on improving the resonant frequency of the choke 22. When S2 is less than 4 mm, the through hole 22224 is too large and is prone to wave leakage. By setting the shape and size of the through hole 22224, the microwave leakage can be effectively reduced on the basis of improving the resonant frequency of the choke 22.

[0092] It should be pointed out that in the embodiments of the present invention, the value of S1 can be 2mm, 2.2mm, 2.4mm, 2.6mm, 2.8mm, 3mm, 3.2mm, 3.4mm, 3.6mm, 3.8mm, and 4mm; at the same time, the value of S2 can be 2mm, 2.2mm, 2.4mm, 2.6mm, 2.8mm, 3mm, 3.2mm, 3.4mm, 3.6mm, 3.8mm, and 4mm.

[0093] In some embodiments of the present invention, Figure 8 , Fig. 9 , Fig.11 , Fig.13 as well as Fig.14 As shown, the choke portion 22 includes a choke plate 221 and a plurality of choke teeth 222 connected to the choke plate 221, wherein the choke teeth 222 include a first plate 2221 and a second plate 2222, the choke plate 221 is vertically connected to the door frame 201, the first plate 2221 is connected to the choke plate 221 and the two are coplanarly arranged, the second plate 2222 is vertically connected to the first plate 2221, and the second plate 2222 is extended to one side of the convex ring portion 21. At this time, the choke plate 221, the first plate 2221 and the second plate 2222 are in an L-shaped structure, and the second plate 2222 is arranged as a T-shaped plate, the small end (first end) of the T-shaped plate is vertically connected to the first plate 2221, and the large end (second end) of the T-shaped plate is arranged close to the convex ring portion 21.

[0094] A flange portion 22223 is provided on the large end of the T-shaped plate, wherein the first plate 2221 and the flange portion 22223 are located on the same side of the T-shaped plate, and the first plate 2221 and the flange portion 22223 are arranged in parallel. By providing the flange portion 22223, the overall length of the choke tooth 222 is increased, so that microwaves can be effectively blocked at the position of the choke tooth 222, further improving the shielding effect of microwaves.

[0095] In some embodiments of the present invention, Fig. 9 As shown, the flange portion 22223 is arranged perpendicularly to the second plate 2222 which is a T-shaped plate, and the flange portion 22223 is extended toward the side close to the door frame 201. In the direction perpendicular to the second plate 2222, the extension dimension of the flange portion 22223 is defined as L4, wherein the value of L4 is between 3 mm and 5 mm.

[0096] When the extension dimension L4 of the flange portion 22223 is less than 3 mm, its dimension is too small, and the shielding effect against microwaves is poor. When the extension dimension L4 of the flange portion 22223 is greater than 5 mm, its dimension is too large, and it is easy to cause the dimension between the flange portion 22223 and the door frame 201 to be too small, thus affecting the shielding effect against microwaves.

[0097] It should be pointed out that in the implementation manner of the present invention, the value of L4 can be 3mm, 3.2mm, 3.4mm, 3.6mm, 3.8mm, 4mm, 4.2mm, 4.4mm, 4.6mm, 4.8mm, 5mm, 5.2mm, 5.4mm, 5.6mm, 5.8mm, and 6mm.

[0098] In addition, in an embodiment of the present invention, in the protruding direction of the protruding ring portion 21, the protruding ring portion 21 protrudes beyond the choke portion 22, and the protruding size of the protruding ring portion 21 is between 3 mm and 6 mm. By providing the protruding ring portion 21 beyond the choke portion 22, it is possible to supplement the transmission length of λ / 4 when the door sliding angle of the microwave cooking appliance 100 is large, thereby structurally reducing the gap between the door assembly 20 and the front panel 11 of the box body 10 and improving the anti-wave leakage performance.

[0099] In some embodiments of the present invention, Figure 7 As shown, the choke portion 22 includes a choke plate 221 and a plurality of choke teeth 222 connected to the choke plate 221, wherein the choke teeth 222 include a first plate 2221 and a second plate 2222, the choke plate 221 is vertically connected to the door frame 201, the first plate 2221 is connected to the choke plate 221 and the two are coplanarly arranged, the second plate 2222 is vertically connected to the first plate 2221, and the second plate 2222 is extended to one side of the convex ring portion 21. At this time, the choke plate 221, the first plate 2221 and the second plate 2222 are in an L-shaped structure, and the second plate 2222 is arranged as a T-shaped plate, the small end of the T-shaped plate is vertically connected to the first plate 2221, and the large end of the T-shaped plate is arranged close to the convex ring portion 21.

[0100] Specifically, the second plate 2222, which is a T-shaped plate, includes a first rectangular portion 22221 and a second rectangular portion 22222 which are connected to the same plane, wherein, in the plane where the two rectangular portions are located, the first rectangular portion 22221 and the second rectangular portion 22222 are arranged along a first direction, and in a direction perpendicular to the arrangement of the two rectangular portions, the first rectangular portion 22221 has a first size T1, and the second rectangular portion 22222 has a first size T2, wherein T1<T2, b=(T2-T1) / 2, and the value of b is in the range of 1mm to 1.8mm.

[0101] b represents the size difference at the transition position between the first rectangular portion 22221 and the second rectangular portion 22222. When the value of b is larger, the size difference at the transition position between the first rectangular portion 22221 and the second rectangular portion 22222 is larger. When the value of b is smaller, the size difference at the transition position between the first rectangular portion 22221 and the second rectangular portion 22222 is smaller. When b is less than 1 mm, the size difference at the transition position between the first rectangular portion 22221 and the second rectangular portion 22222 is small, and the effect of improving the resonant frequency of the choke tooth 222 is not good. When b is greater than 1.8, the size difference at the transition position between the first rectangular portion 22221 and the second rectangular portion 22222 is large, and microwave leakage is likely to occur at the transition position.

[0102] In the embodiment of the present invention, by setting the value of b in the range of 1 mm to 1.8 mm, the microwave leakage can be effectively reduced on the basis of effectively improving the resonant frequency of the choke tooth 222 .

[0103] It should be pointed out that, in the embodiments of the present invention, the value of b can be 1 mm, 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm, 1.5 mm, 1.6 mm, 1.7 mm, or 1.8 mm.

[0104] In some embodiments of the present invention, Figure 7 , Fig.10 and Fig.11 As shown, the second plate 2222 of the T-shaped plate includes a first rectangular portion 22221 and a second rectangular portion 22222 which are coplanar and connected, wherein, in the plane where the two rectangular portions are located, the first rectangular portion 22221 and the second rectangular portion 22222 are arranged along a first direction, and in the first direction, the first rectangular portion 22221 has a third size T3, and the second rectangular portion 22222 has a fourth size T4, wherein T4≤T3.

[0105] In the first direction, by setting the dimensions of the first rectangular portion 22221 and the second rectangular portion 22222, the dimension of the first rectangular portion 22221 in the first direction is not smaller than the dimension of the second rectangular portion 22222 in the first direction. Thus, the structure formed by the first rectangular portion 22221 and the second rectangular portion 22222 can be utilized to improve the shielding effect against microwaves.

[0106] In some embodiments of the present invention, Figure 7 , Fig.10 and Fig.11 As shown, the spoiler is vertically connected to the door frame 201, and in a second direction perpendicular to the spoiler, the choke tooth 222 has a first preset size L1, and the value of L1 is in the range of 8 mm to 12 mm.

[0107] It should be understood that when L1 is less than 8 mm, the size of the choke tooth 222 is relatively small, and its shielding effect on microwaves is poor, which is prone to microwave leakage. When L1 is greater than 12 mm, the size of the choke tooth 222 is relatively large, and it will occupy a larger space on the door frame 201, which is not conducive to narrowing the edge of the door frame 201.

[0108] In this embodiment, by setting the value of L1 within the range of 8 mm to 12 mm, the shielding effect on microwaves can be improved while the door frame 201 can be effectively narrowed, which is beneficial to increase the opening size of the cooking cavity 12, thereby improving the user experience.

[0109] It should be pointed out that, in the embodiment of the present invention, the value of L1 can be 8mm, 8.5mm, 9mm, 9.5mm, 10mm, 10.5mm, 11mm, 11.5mm, or 12mm.

[0110] Furthermore, if Figure 7 , Fig.10 and Fig.11 As shown, the choke plate 221 has a second preset size L2 in the protruding direction of the protruding ring portion 21, and the value of L2 is in the range of 6 mm to 9 mm;

[0111] It should be understood that when L2 is less than 6 mm, the size of the choke part 22 is relatively small, and its shielding effect on microwaves is poor, which is prone to microwave leakage. When L2 is greater than 9 mm, the size of the choke part 22 is relatively large, and it will occupy a larger space on the door frame 201, which is prone to cause the door frame 201 to thicken.

[0112] In this embodiment, by setting the value of L2 to be within the range of 6 mm to 9 mm, the shielding effect against microwaves can be improved while the volume of the door frame 201 can be effectively reduced.

[0113] It should be pointed out that, in the embodiment of the present invention, the value of L2 can be 6mm, 6.5mm, 7mm, 7.5mm, 8mm, 8.5mm, or 9mm.

[0114] Furthermore, if Figure 7 , Fig.10 and Fig.11 As shown, in the protruding direction of the protruding ring portion 21 , the choke tooth 222 has a third preset size L3 in the protruding direction of the protruding ring portion 21 , and the value of L3 is in the range of 10 mm to 13 mm.

[0115] It should be understood that when L3 is less than 10 mm, the size of the choke part 22 is relatively small, and its shielding effect on microwaves is poor, which is prone to microwave leakage. When L3 is greater than 13 mm, the size of the choke part 22 is relatively large, and it will occupy a larger space on the door frame 201, which is prone to cause the door frame 201 to thicken.

[0116] In this embodiment, by setting the value of L3 to be within the range of 10 mm to 13 mm, the shielding effect against microwaves can be improved while the volume of the door frame 201 can be effectively reduced.

[0117] It should be pointed out that, in the embodiment of the present invention, the value of L3 can be 10mm, 11.5mm, 12mm, 12.5mm, or 13mm.

[0118] In addition, in the present embodiment, L1+L2+L3≈30 mm, thereby satisfying the microwave transmission cutoff principle of λ / 4, thereby improving the shielding effect of microwaves.

[0119] In some embodiments of the present invention, the door assembly 20 further includes a housing 202, a door seal 204, and a light-transmitting plate 203. A receiving groove is provided on the housing 202, the choke portion 22 of the door frame 201 is accommodated in the receiving groove, the convex ring portion 21 of the door frame 201 is arranged outside the receiving groove, the door seal 204 and the housing 202 are matched in a detachable manner, the door seal 204 seals the opening of the receiving groove, the light-transmitting plate 203 is mounted and fixed on the housing 202, and the light-transmitting plate 203 seals the hollow area of ​​the door frame 201.

[0120] Specifically, the door frame 201 is a frame structure with a hollow structure in the middle. The shape of the outer shell 202 is matched with the door frame 201, the receiving groove is an annular groove, and the shape of the door seal 204 is matched with the shape of the receiving groove. During assembly, the portion of the door frame 201 having the choke portion 22 is set in the receiving groove. At the same time, the portion of the door frame 201 having the raised portion is located on the outside of the receiving groove. The door seal 204 is then matched with the opening of the receiving groove (the side facing the front panel 11 of the box body 10), so that the choke portion 22 of the door frame 201 is encapsulated in the outer shell 202, so that the appearance of the door assembly 20 is beautiful, which is convenient for product promotion and popularization.

[0121] In addition, the light-transmitting plate 203 is disposed on the housing 202 , and the user can observe the situation in the cooking cavity 12 through the light-transmitting plate 203 and the hollow area, further improving the user's experience.

[0122] In addition, a sealing ring 205 is provided between the door seal 204 and the outer shell 202 , thereby improving the sealing inside the door assembly 20 and reducing the adverse effects of the external environment on the inside of the door assembly 20 .

[0123] In some embodiments of the present invention, a convex rib structure 211 is provided on the side of the convex ring portion 21 facing the front plate 11 of the cabinet 10 . The convex rib structure 211 surrounds the door frame 201 and extends into the cooking cavity 12 of the cabinet 10 .

[0124] Specifically, when the door assembly 20 is used in the microwave cooking device 100, the door assembly 20 is pivotally connected to the cabinet 10 of the microwave cooking device 100 through the door frame 201, and the cooking cavity 12 in the cabinet 10 is opened or closed by opening and closing the door assembly 20. When the door assembly 20 is in a closed state, the convex ring portion 21 of the door frame 201 abuts against the cabinet 10 or is spaced from the cabinet 10 (with a small gap between the two), and the inner edge of the convex ring portion 21 is aligned with or staggered with the opening of the cooking cavity 12, and the convex rib structure 211 extends through the opening of the front plate into the cooking cavity 12 of the cabinet 10. By providing the convex rib structure 211, the microwave blocking structure is further increased, so that the microwave leakage is further reduced.

[0125] It should be noted that the rib structure 211 is formed on the inner edge of the convex ring portion 21 (the edge of the convex ring portion 21 on the side close to the hollow area of ​​the door frame 201 ).

[0126] like Figures 1 to 14 As shown, a second aspect of the present invention proposes a microwave cooking appliance 100, which includes a cabinet 10 and a door assembly 20 as described above. The cabinet 10 includes a cooking cavity 12 and a front plate 11. The opening of the cooking cavity 12 is arranged on the front plate 11, and the outside is connected to the cooking cavity 12 through the opening. The door assembly 20 is pivotally connected to the front plate 11 for opening or closing the cooking cavity 12.

[0127] According to the microwave cooking device 100 of the present invention, the door assembly 20 is pivotally connected to the cabinet 10 of the microwave cooking device 100 through the door frame 201, and the cooking cavity 12 in the cabinet 100 is opened or closed by opening and closing the door assembly 20. When the door assembly 20 is in a closed state, the choke portion 22 is arranged at the gap position between the cabinet 10 and the door assembly 20 and is used to block the microwaves escaping from the cooking cavity 12. The edge of at least one of the multiple plates of the choke tooth 222 is arranged in a stepped structure. When the microwave reaches the position of the choke tooth 222, the propagation path of the microwave can be extended, so that the filtering effect of the microwave can be improved. At the same time, by setting the choke tooth 222, the opening size of the cooking cavity 12 can be effectively increased on the basis of reducing microwave leakage, thereby meeting the user's usage requirements and improving the user's usage experience.

[0128] In some embodiments of the present invention, the minimum distance between the opening of the cooking cavity 12 and the outer edge of the front plate 11 is a, wherein 20 mm ≤ a ≤ 30 mm.

[0129] Specifically, the edge of at least one of the multiple plate bodies of the choke tooth 222 is set to a stepped structure. When the microwave reaches the position of the choke tooth 222, the propagation path of the microwave can be extended, so that the filtering effect of the microwave can be improved. On this basis, the opening of the cooking cavity 12 can be enlarged so that the minimum distance between the opening of the cooking cavity 12 and the outer edge of the front plate 11 can be controlled within the range of 20mm-30mm, thereby realizing the narrow side setting of the cooking utensil.

[0130] It should be understood that when the value of the minimum distance a between the opening of the cooking cavity 12 and the outer edge of the front plate 11 is less than 20 mm, the distance between the opening of the cooking cavity 12 and the outer edge of the front plate 11 is too small, and the layout of the choke 22 cannot be effectively realized, resulting in a poor shielding effect of the choke 22 on microwaves. When the value of the minimum distance a between the opening of the cooking cavity 12 and the outer edge of the front plate 11 is greater than 30 mm, the distance between the opening of the cooking cavity 12 and the outer edge of the front plate 11 is too large, and the opening size of the cooking cavity 12 cannot be effectively increased. In the present invention, the value of a is set between 20 mm and 30 mm, so that the narrow side of the door frame 201 is set, and the opening of the cooking cavity 12 can be effectively increased while taking into account the shielding effect on microwaves.

[0131] In addition, in an embodiment of the present invention, the value of a can be 20mm, 21mm, 22mm, 23mm, 24mm, 25mm, 26mm, 27mm, 28mm, 29mm, or 30mm.

[0132] In an embodiment of the present invention, the above-mentioned microwave cooking appliance is a microwave oven (in other embodiments of the present invention, the microwave cooking appliance is a microwave oven). For the structure of other parts of the microwave cooking appliance, please refer to the prior art and will not be described in detail in this application.

[0133] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A door assembly for a microwave cooking appliance, characterized in that: The door assembly includes a door frame having a first side surface, wherein the first side surface is used to face the box body of the microwave cooking appliance, the door frame is provided with a choke portion on the first side surface, the choke portion includes a choke plate and a plurality of choke teeth, the choke plate is connected to the edge of the door frame and surrounds the door frame, the choke plate is extended in the direction of the first side surface, the plurality of choke teeth are respectively connected to one end of the choke plate away from the first side surface, and the plurality of choke teeth are spaced apart along the circumference of the door frame, the choke teeth include a plurality of plate bodies, the plurality of plate bodies are connected in sequence, and two adjacent plate bodies are intersected, and the edge of at least one of the plate bodies is a stepped structure.

2. The door assembly according to claim 1, characterized in that The door frame is further provided with a convex ring portion on the first side surface. The convex ring portion is arranged on the inner side of the choke portion and surrounds the door frame. The convex ring portion is spaced apart from the choke portion and forms a choke groove.

3. The door assembly according to claim 2, characterized in that The plurality of plates include: a first plate, one end of which is connected to the choke plate and is coplanar with the choke plate; A second plate, the second plate is located on a side of the first plate facing the convex ring portion, the second plate is a T-shaped plate, and in a direction perpendicular to the first plate, the T-shaped plate has a first end and a second end oppositely arranged, the first end is vertically connected to the other end of the first plate, and the second end is arranged close to the convex ring portion, and in a direction within the plate surface of the T-shaped plate and parallel to the first plate, the size of the first end is smaller than the size of the second end.

4. The door assembly according to claim 3, characterized in that At least part of the second plate of the choke teeth is provided with a through hole, and the through hole includes one of a circular hole, a square hole, an elliptical hole, a triangular hole and a diamond hole.

5. The door assembly according to claim 4, characterized in that The through hole is a square hole having a first side length S1 and a second side length S2, 2mm≤S1≤4mm, 2mm≤S2≤4mm.

6. The door assembly according to claim 3, characterized in that A flange portion is provided on the second end of the T-shaped plate. The flange portion and the first plate are located on the same side of the T-shaped plate, and the flange portion is parallel to the first plate.

7. The door assembly according to claim 6, characterized in that In a direction perpendicular to the T-shaped plate, the flange portion has an extension dimension, and the extension dimension is L4, wherein 3mm≤L4≤5mm.

8. The door assembly according to claim 3, characterized in that The T-shaped plate includes a first rectangular portion and a second rectangular portion, the first rectangular portion is connected to the first plate and is arranged coplanarly with the second rectangular portion, in the plane where the first rectangular portion and the second rectangular portion are located, and in a direction perpendicular to the arrangement direction of the first rectangular portion and the second rectangular portion, the first rectangular portion has a first size, the first size is T1, and the second rectangular portion has a second size, the second size is T2, wherein T2>T1, and (T2-T1) / 2=b, 1mm≤b≤1.8mm.

9. The door assembly according to claim 8, characterized in that In the arrangement direction of the first rectangular portion and the second rectangular portion, the first rectangular portion has a third size, which is T3, and the second rectangular portion has a fourth size, which is T4, wherein T3≥T4.

10. The door assembly according to claim 2, characterized in that In a direction perpendicular to the choke plate, the choke tooth has a first preset size, the first preset size is L1, wherein 8 mm ≤ L1 ≤ 12 mm; and / or, in the protruding direction of the protruding ring portion, the choke plate has a second preset size, the second preset size is L2, wherein 6 mm ≤ L2 ≤ 9 mm; And / or, in the protruding direction of the protruding ring portion, the choke tooth has a third preset size, and the third preset size is L3, wherein 10mm≤L3≤13mm.

11. The door assembly according to any one of claims 2 to 10, characterized in that: The door frame has a hollow area, and the hollow area is located on the inner side of the convex ring part. The door assembly also includes a shell, a door seal and a light-transmitting plate. The shell is provided with a receiving groove, and the choke part is received in the receiving groove. The convex ring part is arranged on the outer side of the receiving groove. The door seal cooperates with the shell in a detachable manner to close the opening of the receiving groove. The light-transmitting plate is installed on the shell and closes the hollow area. And / or, a convex rib structure is provided on the side of the front plate of the convex ring portion facing the box body, and the convex rib structure surrounds the door frame and is used to extend into the cooking cavity of the box body.

12. A microwave cooking device, characterized in that: The microwave cooking appliance comprises: A box body, the box body comprising a front plate and a cooking cavity, an opening of the cooking cavity is arranged on the front plate, and the cooking cavity is communicated with the outside through the opening; According to any one of claims 1 to 11, the door frame of the door assembly is pivotally connected to the front plate for opening or closing the cooking cavity.

13. The microwave cooking device according to claim 12, characterized in that: The minimum distance between the opening and the outer edge of the front plate is a, wherein 20 mm ≤ a ≤ 30 mm.

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