Microwave shielding door assembly and microwave cooking appliance

Abstract

The present invention discloses a microwave shielding door assembly and a microwave cooking appliance, the microwave shielding door assembly comprising: a door body; a door panel provided on the door body, and an incisor structure provided on the outer periphery of the door panel; a door frame provided on the cavity of the cooking appliance; the incisor structure comprising at least three layers of incisors provided along the thickness direction of the door panel; the door frame is adapted to the outer edge structure of the incisors. The microwave cooking appliance is provided with the above-mentioned microwave shielding door assembly. In the microwave shielding door assembly of the present invention, more than two layers of incisors are provided on the outer periphery of the door panel, which can increase the microwave impedance effect, weaken reflected waves and standing waves, increase the power capacity of microwave transmission, reduce focusing phenomenon, and improve the efficiency of microwave shielding; the door frame of the cavity is adapted to the outer edge structure of the incisors, which can effectively reduce microwave leakage.

Description

Technical Field

[0001] The invention relates to the technical field of kitchen appliances, and in particular to a microwave shielding door assembly of a cooking appliance with microwave function and a microwave cooking appliance. Background Art

[0002] As people's living standards improve, the proportion of household cooking appliances is increasing year by year. The microwave function of microwave cooking appliances is to use the principle that the molecules of the food being cooked generate high-frequency motion in the cavity under the action of the alternating electromagnetic field, and the molecules generate heat through high-speed and intense friction. When using the microwave function, if the microwave protection facilities are not in place, the generated microwaves will leak radiation or exceed the radiation standard. The microwave shielding structure of the door body of the existing cooking appliance cannot completely and effectively solve the problem of microwave leakage and radiation exceeding the standard. The incisor structure around the door body can only shield microwaves of a certain frequency, and cannot shield or reliably shield microwaves with frequency band conversion. Summary of the invention

[0003] In view of the problems existing in the prior art, a first object of the present invention is to provide a microwave shielding door assembly that can more effectively shield microwaves of multiple frequency bands.

[0004] To achieve the above object, the technical solution of the microwave shielding door assembly of the present invention is as follows:

[0005] A microwave shielding door assembly comprises: a door body, a door panel arranged on the door body, and an incisor structure arranged on the outer periphery of the door panel; a door frame arranged on the cooking appliance cavity; the incisor structure comprises at least three layers of incisors arranged along the thickness direction of the door panel; and the door frame is adapted to the outer edge structure of the incisors.

[0006] Furthermore, from inside the cavity of the cooking appliance to outside the cavity, the outer side walls of the different incisors gradually incline toward the edges on each side of the cooking appliance.

[0007] Furthermore, the door frame is provided with an inclined outer edge adapted to the outer side wall of the incisor.

[0008] Furthermore, the shape of the longitudinal section of the incisor is a trapezoidal hollow structure.

[0009] Furthermore, the corner connections of two adjacent sides on the door body are connected by the incisors so that the corner connection parts of two adjacent sides are obtuse angles, and the mating surfaces of the incisors of the corner connections of two adjacent sides of the door frame and the door body are adapted.

[0010] Furthermore, the microwave shielding door assembly also includes: a shielding plate connected to the door panel via an elastic member; the shielding plate is connected to the side of the door panel close to the cooking appliance cavity; a planar outer edge is provided on the outer edge of the shielding plate; and a planar inner edge is provided on the door frame for fitting with the planar outer edge.

[0011] Furthermore, the elastic member is a compression spring washer.

[0012] Furthermore, the circumferential dimension of the shielding plate is smaller than or equal to the circumferential dimension of the edge of the incisor close to the cooking appliance cavity side.

[0013] Furthermore, the outer surfaces A of the incisors on different layers on the same side of the door body are located in the same plane, and the surface of the door frame that matches the outer surface of the incisors is also a plane.

[0014] The beneficial effects brought by the microwave shielding door assembly of the present invention are:

[0015] At least three layers of incisions are arranged on the periphery of the door panel, which can increase the microwave impedance effect, weaken reflected waves and standing waves, increase the power capacity of microwave transmission, reduce focusing phenomena, and improve the efficiency of microwave shielding; the door frame of the cavity is adapted to the outer edge structure of the incisions, which can effectively reduce microwave leakage.

[0016] A second object of the present invention is to provide a microwave cooking appliance to solve the problem that the door of the existing cooking appliance has poor microwave shielding effect.

[0017] To achieve the above object, the technical solution of the microwave cooking appliance of the present invention is as follows:

[0018] A microwave cooking appliance is provided with the microwave shielding door assembly.

[0019] The beneficial effects brought by the microwave cooking appliance of the present invention are:

[0020] The cooking appliance is provided with the microwave shielding door assembly of the present invention, thereby improving the microwave shielding effect of the cooking appliance. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the specific embodiments or the description of the prior art will be briefly introduced below, and only an oven will be used as a representative for explanation. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 A schematic diagram of a microwave shielding door assembly provided in Embodiment 1 of the present invention is shown;

[0023] Figure 2 A schematic diagram of the longitudinal cross-sectional structure of a microwave shielding door assembly provided in Embodiment 1 of the present invention is shown;

[0024] Figure 3 It is a schematic structural diagram of the door body 10 in the microwave shielding door body assembly of the first embodiment;

[0025] Figure 4 for Figure 3 Schematic diagram of the cross-sectional structure.

[0026] Icons: 10—door body; 1—door panel; 2—incisor structure; 2-1—inner incisor; 2-2—middle incisor; 2-3—outer incisor; 3—inclined outer edge; 4—flat inner edge; 5—elastic part; 6—shielding plate; 7—yoke flow channel. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0028] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] In order to more clearly explain the technical solution in the present invention, the present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments. In the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other.

[0030] Embodiment 1

[0031] like Figure 1-4 As shown, this embodiment provides a microwave shielding door assembly of the present invention, comprising: a door body 10; a door panel 1 is arranged on the door body 10, and an incisor structure 2 is arranged on the outer periphery of the door panel 1; a door frame is arranged on the cooking appliance cavity; the incisor structure 2 includes more than two layers of incisors arranged along the thickness direction of the door panel; the door frame is adapted to the outer edge structure of the incisors.

[0032] In the microwave shielding door assembly of this embodiment, at least three layers of incisors are arranged on the periphery of the door panel 1, which can increase the microwave impedance effect, weaken the reflected wave and the standing wave, increase the power capacity of microwave transmission, reduce the focusing phenomenon, and improve the efficiency of microwave shielding; the door frame of the cavity is adapted to the outer edge structure of the incisors, which can effectively reduce microwave leakage. It should be noted that the cooking appliance of this embodiment can be a microwave oven, a steam-bake integrated machine, etc.

[0033] See also Figure 2 , Figure 4 In this embodiment, the outer periphery of the door body 1 is provided with three layers of incisors, namely, inner incisors 2-1, middle incisors 2-2 and outer incisors 2-3. The three layers of incisors can effectively shield microwaves of the usable frequency of cooking appliances (generally, 2450MHz and 915MHz are commonly used in household appliances, mainly these two frequencies). Therefore, the microwave shielding door assembly of this embodiment can be adapted to microwave cooking appliances with multi-frequency conversion.

[0034] In this embodiment, from the inside to the outside of the cavity of the cooking appliance, the outer side walls of different incisors gradually tilt toward the edges of each side of the cooking appliance. Specifically, the outer side walls of the inner incisors 2-1, the middle incisors 2-2, and the outer incisors 2-3 gradually tilt toward the edges of each side of the cooking appliance, and accordingly, an inclined outer edge 3 adapted to the outer side wall of the incisors is provided on the door frame.

[0035] The bevel design of the outer wall of the incisor and the inclined outer edge 3 can increase the effective shielding area, which is more conducive to reducing microwave leakage.

[0036] In a specific embodiment, the outer surfaces A of the incisors on different layers on the same side of the door body 10 are located in the same plane, and the surface where the door frame and the outer surfaces of the incisors are matched is also a plane. By setting the outer surfaces of the incisors to be on the same plane, it is convenient to manufacture and easy to control the matching surface during assembly while ensuring the microwave shielding performance, thereby reducing the difficulty of processing and assembly. Specifically, Figure 4 As shown, the outer surface A1 of the inner incisor 2-1, the outer surface A2 of the middle incisor 2-2 and the outer surface A3 of the outer incisor 2-3 are in the same plane A, and the surface B where the door frame and the outer surface of the incisor fit is parallel to the plane A. In this way, the contact surface can be increased and the microwave shielding effect is better.

[0037] The corners of the door body 10 are connected by incisors, so that the corner connection of the two adjacent sides is an obtuse angle α, and the joint surfaces of the incisors of the two adjacent corners of the door frame and the two adjacent corners of the door body are adapted. Figure 1 , Figure 3As shown, there are three incisors at the connection of the two adjacent corners of the door body, and the outer surfaces C1, C2, and C3 on the three incisors are located on the same plane, and the surface D of the door frame corresponding to the outer surfaces C1, C2, and C3 is also a plane. This can not only improve the processing performance of the door frame and the incisors, increase the assembly efficiency of the door body and the door frame, but also increase the microwave shielding effect.

[0038] See also Figure 2 , Figure 4 , the incisors are hollow structures. That is, the inner incisors 2-1, the middle incisors 2-2 and the outer incisors 2-3 are all hollow structures.

[0039] Designing the incisors as hollow structures can further increase the microwave impedance effect, weaken reflected waves and standing waves, increase the power capacity of microwave transmission, reduce focusing phenomena, and improve the efficiency of microwave shielding.

[0040] See also Figure 2 , Figure 4 The microwave shielding door assembly of this embodiment also includes: a shielding plate 6 connected to the door panel 1 through an elastic member 5; the shielding plate 6 is connected to the side of the door panel 1 close to the cooking appliance cavity; a planar outer edge is set on the outer edge of the shielding plate 6; and a planar inner edge 4 for fitting with the planar outer edge is set on the door frame.

[0041] The planar outer edge of the shielding plate 6 is fitted with the planar inner edge 4 of the door frame through the elastic member 5 to compensate for the cumulative dimensional tolerance of the manufacturing process and the assembly process, so that the shielding plate 6 is always tightly fitted with the planar inner edge 4 of the door frame without leaving any gap, thereby effectively shielding microwave leakage.

[0042] The elastic member 5 of this embodiment is a compression spring washer.

[0043] In other embodiments of the present invention, the elastic member 5 may also be an elastic component such as a spring.

[0044] In this embodiment, the circumferential dimension of the shielding plate 6 is smaller than or equal to the circumferential dimension of the edge of the incisor near the cooking appliance cavity side, that is, the circumferential dimension of the shielding plate 6 is smaller than or equal to the circumferential dimension of the edge of the inner incisor 2-1 near the cooking appliance cavity side.

[0045] In this embodiment, the shape of the longitudinal section of the incisor is a trapezoid. Figure 2 , Figure 4 The longitudinal cross-sections of the inner incisor 2-1, the middle incisor 2-2 and the outer incisor 2-3 are all trapezoidal, and the trapezoidal size of the cross-section of the outer incisor 2-3 is the largest.

[0046] The cross section of the incisors is set to be trapezoidal, which is beneficial to increase the power capacity of transmission, reduce focusing phenomenon, and improve the efficiency of microwave shielding.

[0047] In this embodiment, each layer of incisors is provided with a plurality of yoke flow slots 7. Specifically, each of the inner layer incisors 2-1, the middle layer incisors 2-2 and the outer layer incisors 2-3 is provided with a plurality of yoke flow slots 7, and the plurality of yoke flow slots 7 on each layer of incisors are evenly distributed.

[0048] The purpose of disposing a plurality of yoke flow grooves 7 is to reflect microwaves back into the cavity of the cooking appliance, thereby achieving the purpose of further shielding microwave leakage.

[0049] It should be noted that, according to the actual required shielding effect, technical personnel in this field can adjust the number of layers and sizes of the door teeth set on the door panel 1 as needed, and these can be made by technical personnel in this field based on their basic skills after understanding the concept of the present invention, so they will not be listed one by one here.

[0050] Embodiment 2

[0051] This embodiment provides a microwave cooking appliance of the present invention, wherein the cooking appliance is provided with the microwave shielding door assembly of the first embodiment.

[0052] The cooking appliance of this embodiment is provided with the microwave shielding door assembly of the first embodiment, thereby improving the microwave shielding effect of the cooking appliance.

[0053] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A microwave shielding door assembly, characterized in that: include: A door body (10); a door panel (1) is arranged on the door body (10); an incisor structure (2) is arranged on the outer periphery of the door panel (1); a door frame is arranged on the cavity of the cooking appliance; the incisor structure (2) comprises at least three layers of incisors arranged along the thickness direction of the door panel (1); a yoke flow groove (7) is arranged on each layer of the incisors; the door frame is adapted to the outer edge structure of the incisors; from the inside of the cavity of the cooking appliance to the outside of the cavity, the outer side walls of different incisors gradually incline towards the edges on each side of the cooking appliance.

2. The microwave shielding door assembly according to claim 1, characterized in that: The door frame is provided with an inclined outer edge (3) adapted to the outer side wall of the incisor.

3. The microwave shielding door assembly according to claim 1, characterized in that: The shape of the longitudinal section of the incisor is a trapezoidal hollow structure.

4. The microwave shielding door assembly according to claim 1, characterized in that: The corner connections of two adjacent sides on the door body are connected by the incisors so that the corner connection parts of the two adjacent sides are obtuse angles, and the corners of the two adjacent sides of the door frame are matched with the mating surfaces of the incisors of the corner connections of the two adjacent sides on the door body.

5. The microwave shielding door assembly according to claim 1, characterized in that: It also comprises: a shielding plate (6) connected to the door panel (1) via an elastic member (5); the shielding plate (6) is connected to a side of the door panel (1) close to the cooking appliance cavity; a planar outer edge is arranged on the outer edge of the shielding plate (6); and a planar inner edge (4) is arranged on the door frame for being in contact with the planar outer edge.

6. The microwave shielding door assembly according to claim 5, characterized in that: The elastic member (5) is a compression spring washer.

7. The microwave shielding door assembly according to claim 5, characterized in that: The circumferential dimension of the shielding plate (6) is smaller than or equal to the circumferential dimension of the edge of the incisor close to the cooking appliance cavity side.

8. The microwave shielding door assembly according to claim 1, characterized in that: The outer surfaces A of the incisors on different layers on the same side of the door body (10) are located in the same plane, and the surface of the door frame that matches the outer surfaces of the incisors is also a plane.

9. A microwave cooking appliance, characterized in that: The microwave cooking appliance is provided with a microwave shielding door assembly as described in any one of claims 1-8.

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