Cooking equipment

Abstract

The utility model relates to the technical field of household appliances, and discloses a cooking device which comprises an inner container, a heating device and a heating device. The magnetron is positioned outside the cooking cavity and is used for generating microwaves; the waveguide box is positioned between the cooking cavity and the magnetron and is used for guiding the microwaves from the magnetron into the cooking cavity; a microwave inlet is formed in one end of the waveguide box, a microwave outlet is formed in one side face of the waveguide box, and a first convex hull is arranged on the inner side wall, opposite to the microwave outlet, of the waveguide box; the waveguide box between the first convex hull and the microwave inlet is provided with a convex cavity formed by protruding towards the outer side; the stirring antenna assembly is used for transmitting the microwaves guided by the waveguide box into the cooking cavity. According to the cooking equipment and the waveguide box, by designing the convex cavities and the first convex hulls, microwaves can be effectively gathered, microwave energy can be efficiently and directionally reflected and guided to be output from the microwave outlet, the transmission efficiency of the microwave energy is remarkably improved, and the heating performance of the cooking equipment is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of household appliances, in particular to a cooking device. Background Art

[0002] In the microwave systems of cooking appliances like microwave ovens and microwave-steamer combos, the microwave transmission and conduction components play a crucial role. The rationality of their structural design directly impacts the microwave's heating effect. Existing microwave transmission and conduction components generally consist of two parts: a magnetron, responsible for microwave emission, and a waveguide, responsible for microwave conduction. The magnetron is equipped with a microwave transmitter head that emits microwaves, which then enter the waveguide. The waveguide conducts the received microwaves further into the inner pot, achieving heating.

[0003] However, the existing waveguide box has a flat inner surface. This design doesn't fully account for the microwave's conductivity characteristics, significantly impacting microwave transmission efficiency and resulting in low overall microwave transmission efficiency. Therefore, optimizing the waveguide box's structural design to improve microwave transmission efficiency is key to enhancing microwave heating performance. Utility Model Content

[0004] Based on the technical problem of low microwave transmission efficiency of waveguide boxes in the existing technology, the utility model provides a cooking device, in which the waveguide box is equipped with a convex cavity and a first convex hull inside, which can effectively gather microwaves and efficiently reflect microwave energy to the microwave outlet, thereby improving the transmission efficiency of microwave energy in the waveguide box.

[0005] The utility model provides a cooking device, comprising:

[0006] an inner pot having a cooking cavity;

[0007] a magnetron, located outside the cooking cavity and configured to generate microwaves;

[0008] A waveguide box is located between the cooking cavity and the magnetron and is used to guide microwaves from the magnetron into the cooking cavity. A microwave inlet is formed at one end of the waveguide box, a microwave outlet is formed at one side of the waveguide box, and a first convex hump is provided on an inner sidewall of the waveguide box opposite the microwave outlet. The waveguide box has a convex cavity formed by convexing outward between the first convex hump and the microwave inlet.

[0009] The stirring antenna assembly is used for propagating the microwaves guided by the waveguide box into the cooking cavity.

[0010] In some embodiments, the first convex hull is a long strip structure with an arc-shaped cross section, and the length direction of the first convex hull is perpendicular to the emission direction of the microwave.

[0011] In some embodiments, the first convex hull is a hemispherical protrusion.

[0012] In some embodiments, at least one second convex bulge is provided between the other end of the waveguide box opposite to the microwave inlet and the first convex bulge, and the second convex bulge and the first convex bulge are provided on the same inner side wall of the waveguide box.

[0013] In some embodiments, the second convex hull has the same structure as the first convex hull.

[0014] In some embodiments, the convex cavity is formed by one end of the waveguide box extending outward along the inner side surface of the waveguide box, and the connecting surface between the inner wall of the convex cavity and the waveguide box is a smoothly transitioned arc surface.

[0015] In some embodiments, the volume of the protruding cavity gradually decreases outward.

[0016] In some embodiments, the waveguide box is arranged on the upper side of the inner pot; the waveguide box includes a waveguide upper cover and a waveguide lower cover that cover each other, the raised cavity and the first convex bulge are arranged on the waveguide upper cover, and the microwave outlet is opened on the waveguide lower cover.

[0017] In some embodiments, the stirring antenna assembly includes a stirring plate, an antenna shaft connected to the stirring plate, and a driving motor; the stirring plate is arranged on the outside of the microwave outlet, the antenna shaft passes through the waveguide box and is connected to the driving motor, and the driving motor drives the antenna shaft and the stirring plate to rotate.

[0018] In some embodiments, the stirring blade is a sheet-like structure with a wavy profile.

[0019] Compared with the prior art, the advantages and positive effects of the present invention are:

[0020] In the above-mentioned cooking device, the waveguide box can effectively concentrate microwaves and efficiently and directionally reflect and guide the microwave energy to be output from the microwave outlet by designing the convex cavity and the first convex hull, thereby significantly improving the transmission efficiency of microwave energy and improving the heating performance of the cooking device. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0022] Figure 1 This is a schematic diagram of the partial structure of the cooking device of the present invention;

[0023] Figure 2 for Figure 1 sectional view of ;

[0024] Figure 3 It is a three-dimensional diagram of the waveguide box in the cooking device of the present invention;

[0025] Figure 4 This is a three-dimensional diagram of the waveguide box in the cooking device of the present invention when viewed from above;

[0026] Figure 5 is a cross-sectional view of a waveguide box in the cooking device of the present invention;

[0027] Description of reference numerals:

[0028] 100- liner;

[0029] 200-waveguide box; 210-microwave inlet; 220-microwave outlet; 230-first convex hull; 240-convex cavity; 250-second convex hull;

[0030] 300 - stirring antenna assembly; 310 - stirring plate; 320 - antenna shaft; 330 - driving motor. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described 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 efforts are within the scope of protection of the present invention.

[0032] In the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0033] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections. A person of ordinary skill in the art can understand the specific meanings of the above terms in the present invention based on the specific circumstances. In the description of the above embodiments, specific features, structures, materials, or characteristics can be combined in any appropriate manner in any one or more embodiments or examples.

[0034] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include one or more of the described features. In the description of this utility model, unless otherwise specified, "plurality" means two or more.

[0035] Reference Figure 1-Figure 5 , which is an embodiment of the cooking device of the present invention.

[0036] The cooking device mainly includes an inner pot 100 , a magnetron (not shown), a waveguide box 200 and a stirring antenna assembly 300 .

[0037] The inner pot 100, as the main body of the cooking device, has a cooking cavity for placing food and heating it.

[0038] The magnetron, located outside the cooking cavity, is a key component in generating microwaves. It uses electromagnetic fields to convert electrical energy into microwave energy, providing the energy required for the cooking process.

[0039] The waveguide box 200 is located between the cooking cavity and the magnetron, and is used to guide the microwaves from the magnetron into the cooking cavity.

[0040] The stirring antenna assembly 300 is located between the cooking cavity and the waveguide box 200. Its main function is to further propagate the microwaves guided by the waveguide box 200 into the cooking cavity and ensure that the microwaves are more evenly distributed in the cooking cavity.

[0041] Specifically, in this embodiment, see Figure 3-Figure 5 Waveguide box 200 has a microwave inlet 210 at one end and a microwave outlet 220 on its inner bottom. Specifically, a first convex hump 230 is provided on the inner top surface of waveguide box 200, opposite microwave outlet 220. Furthermore, the portion of the waveguide box extending from microwave inlet 210 to first convex hump 230, i.e., the space preceding first convex hump 230, is convex outward, forming a convex cavity 240.

[0042] Since the microwave waveform presents a discrete state after being emitted from the magnetron, that is, the spatial distribution is not uniform, the protruding cavity 240 can effectively gather the microwave inside the cavity, so that the microwave energy is concentrated here.

[0043] When microwave energy accumulates to a certain amount within the convex cavity 240, it propagates toward the first convex hump 230. The first convex hump 230 acts as a reflector, efficiently and directionally reflecting the microwave energy and guiding it out of the microwave outlet 220, significantly improving the transmission efficiency and directional control of the microwave energy.

[0044] In the above-mentioned cooking device, the waveguide box 200 can effectively gather microwaves and efficiently and directionally reflect and guide the microwave energy to be output from the microwave outlet 220 by designing the raised cavity 240 and the first convex bump 230, thereby significantly improving the transmission efficiency of microwave energy and improving the heating performance of the cooking device.

[0045] In this embodiment, the first convex hump 230 is an elongated structure with an arc-shaped cross-section. The length of the first convex hump 230 is perpendicular to the microwave emission direction. When microwaves are emitted forward, some of the microwaves are reflected by the curved side of the first convex hump 230 and then emitted directly toward the microwave outlet 220. To optimize the effect, the microwave outlet 220 is configured as a circular hole and is located at the center of the inner bottom surface of the waveguide box 200. Furthermore, the cross-sectional diameter of the first convex hump 230 is ensured to be smaller than the diameter of the microwave outlet 220, so that the microwaves reflected by the curved side of the first convex hump 230 can smoothly enter the microwave outlet 220.

[0046] In another embodiment, the first convex bump 230 may also adopt a hemispherical protrusion design, which can also achieve the directional reflection function of microwaves.

[0047] Furthermore, to enhance microwave reflection and directionality, at least one second bump 250 is provided between the first bump 230 and the other end of the waveguide box 200 opposite the microwave inlet 210. The second bump 250 and the first bump 230 are located on the same inner sidewall of the waveguide box 200. After some microwaves are reflected by the first bump 230, some remain to propagate forward. After being reflected by the second bump 250, these microwaves are reflected again by the first bump 230 and ultimately emitted through the microwave outlet 220.

[0048] Preferably, the second convex hump 250 is structurally consistent with the first convex hump 230 .

[0049] Referring to the figure, in this embodiment, a raised cavity 240 is formed by extending outward from one end of the waveguide box 200 along the inner side surface of the waveguide box 200. The connection surface between the inner wall of the raised cavity 240 and the waveguide box 200 is a smoothly transitioned arcuate surface a. The smoothly transitioned arcuate surface connecting the inner wall of the raised cavity 240 and the waveguide box 200 reduces reflection and scattering losses during microwave propagation, thereby facilitating the concentration and transmission of microwave energy.

[0050] Furthermore, the volume of the protruding cavity 240 gradually decreases outwards, and in this embodiment, the volume of the upper side of the protruding cavity 240 becomes smaller. As the volume decreases, the microwaves are gradually compressed and focused during propagation, thereby increasing the energy density of the microwaves.

[0051] In this embodiment, the waveguide box 200 is positioned above the inner pot 100, allowing microwaves to be directed downward from the top of the inner pot 100 into the cooking cavity. Specifically, the waveguide box 200 comprises an upper waveguide cover and a lower waveguide cover that overlap each other. The raised cavity 240 and the first raised bump 230 are positioned on the upper waveguide cover, and the microwave outlet 220 is located on the lower waveguide cover.

[0052] In another embodiment, the waveguide box 200 may also be disposed on the lower side of the inner pot 100 , so that microwaves are emitted upward from the bottom of the inner pot 100 into the cooking cavity.

[0053] In this embodiment, the stirring antenna assembly 300 includes a stirring blade 310, an antenna shaft 320 connected to the stirring blade 310, and a drive motor 330. The stirring blade 310 is disposed outside the microwave outlet 220. The antenna shaft 320 passes through the waveguide box 200 and is connected to the drive motor 330. The drive motor 330 drives the antenna shaft 320 and the stirring blade 310 to rotate. The drive motor 330 can be fixed to the waveguide box via a fixing bracket.

[0054] The stirring blade 310 is a sheet-like structure with a wavy profile. The wavy structure can increase the number of reflections and refractions of microwaves within the oven cavity, making the microwave energy more dispersed and evenly distributed within the oven cavity. This design utilizes the multiple reflections and refractions of microwaves on the wavy surface, effectively avoiding localized concentration of microwave energy, thereby improving the uniformity of heating. At the same time, when the wavy stirring blade 310 rotates, its wavy surface continuously changes the propagation path of the microwaves, producing a dynamic stirring effect. This dynamic stirring can further break up the microwave beam, distributing the microwave energy more evenly to the food, and improving the heating effect.

[0055] In addition, the wavy design not only enhances the structural strength of the stirring blade 310 , but also improves its anti-deformation capability, thereby enhancing the durability and adaptability of the stirring blade 310 .

[0056] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the above embodiments, it is still possible for a person skilled in the art to modify the technical solutions described in the above embodiments, or to replace some of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions claimed to be protected by the present invention.

Claims

1. A cooking device, characterized in that: include: an inner pot having a cooking cavity; a magnetron, located outside the cooking cavity and configured to generate microwaves; A waveguide box is located between the cooking cavity and the magnetron and is used to guide microwaves from the magnetron into the cooking cavity. A microwave inlet is formed at one end of the waveguide box, a microwave outlet is formed at one side of the waveguide box, and a first convex hump is provided on an inner sidewall of the waveguide box opposite the microwave outlet. The waveguide box has a convex cavity formed by convexing outward between the first convex hump and the microwave inlet. The stirring antenna assembly is used for propagating the microwaves guided by the waveguide box into the cooking cavity.

2. The cooking device according to claim 1, wherein The first convex hull is a long strip structure with an arc-shaped cross section, and the length direction of the first convex hull is perpendicular to the emission direction of the microwave.

3. The cooking device according to claim 1, wherein The first convex hull is a hemispherical convexity.

4. The cooking device according to any one of claims 1 to 3, characterized in that: At least one second convex bulge is provided between the other end of the waveguide box opposite to the microwave inlet and the first convex bulge, and the second convex bulge and the first convex bulge are provided on the same inner side wall of the waveguide box.

5. The cooking device according to claim 4, characterized in that The second convex hull has the same structure as the first convex hull.

6. The cooking device according to claim 1, wherein The convex cavity is formed by one end of the waveguide box extending outward along the inner side surface of the waveguide box, and the connecting surface between the inner wall of the convex cavity and the waveguide box is a smoothly transitioned arc surface.

7. The cooking device according to claim 6, characterized in that The volume of the protruding cavity gradually decreases outwards.

8. The cooking device according to claim 1, wherein The waveguide box is arranged on the upper side of the inner pot; the waveguide box includes a waveguide upper cover and a waveguide lower cover that cover each other, the convex cavity and the first convex bulge are arranged on the waveguide upper cover, and the microwave outlet is opened on the waveguide lower cover.

9. The cooking device according to claim 1, wherein The stirring antenna assembly includes a stirring plate, an antenna shaft connected to the stirring plate, and a driving motor; the stirring plate is arranged on the outside of the microwave outlet, the antenna shaft passes through the waveguide box and is connected to the driving motor, and the driving motor drives the antenna shaft and the stirring plate to rotate.

10. The cooking device according to claim 9, characterized in that The stirring blade is a sheet structure with a wavy profile.

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