Stirring blade of microwave stirrer and cooking equipment

Abstract

The utility model relates to the technical field of household appliances, and discloses a stirring blade of a microwave stirrer, which is provided with a rotating center. And the stirring blades are bent from inside to outside from the rotating centers of the stirring blades to form a multi-stage step structure. According to the stirring blade of the microwave stirrer and the multi-stage step structure of the stirring blade, a plurality of reflecting surfaces can be formed at different height positions, so that microwaves can be reflected in a larger range, and meanwhile, the reflected microwaves can cover a larger area, so that the microwaves in a cooking cavity are distributed more uniformly; and the cooking effect of the cooking equipment on food materials is improved.

Description

Technical Field

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

[0002] At present, cooking equipment with microwave function uses high-frequency electromagnetic waves (i.e., microwaves) generated by magnetrons for efficient cooking. Among them, the high-frequency microwave waveguide box emitted by the magnetron is transmitted to the cavity of the cooking equipment. A microwave inlet is provided at the tail of the waveguide box, which is connected to the magnetron, and a microwave outlet is provided at the front of the waveguide box, which is connected to the cavity. A microwave stirrer is connected to the outlet of the waveguide box, and the microwave stirrer has a rotatable microwave stirring blade. The microwave stirring blade is made of metal material and can reflect microwaves in multiple directions, so that the microwaves can be distributed more evenly in the cavity to achieve a better heating effect. For example, the Chinese patent with publication number CN 218679428U and name "Stirring component and cooking device with microwave function" discloses a stirring blade of a fan-shaped sheet structure, and the microwave reflecting surface of the stirring blade is a plane, and the uniformity of its microwave reflection effect is not good.

[0003] In order to achieve a more balanced and detailed distribution of microwaves inside the cavity and to achieve the goal of comprehensively improving cooking efficiency and heating effects, it is urgent to develop a new stirring blade structure that can significantly improve microwave uniformity. Utility Model Content

[0004] Based on the technical problem that microwave stirring plates in the prior art do not reflect microwaves uniformly, the utility model provides a stirring plate for a microwave stirrer. A plurality of reflecting surfaces are formed at different heights through the multi-step structure of the stirring plate, so that the reflected microwaves can cover a larger area, thereby making the microwave distribution in the cooking cavity more uniform.

[0005] The utility model provides a stirring blade of a microwave stirrer. The stirring blade has a rotation center. The stirring blade is bent from the inside to the outside from the rotation center to form a multi-step structure.

[0006] In some embodiments, each step of the multi-step step structure has a transverse step surface and a longitudinal step surface; the multiple transverse step surfaces of the multi-step step structure are all planes; or, the multiple transverse step surfaces of the multi-step step structure are all curved surfaces; or, some transverse step surfaces of the multi-step step structure are planes and some transverse step surfaces are curved surfaces.

[0007] In some embodiments, the multiple transverse step surfaces of the multi-step step structure are all vertical planes perpendicular to the rotation axis; or, the multiple transverse step surfaces of the multi-step step structure are all inclined planes not perpendicular to the rotation axis; or, some transverse step surfaces of the multi-step step structure are vertical planes perpendicular to the rotation axis, and some transverse step surfaces are inclined planes not perpendicular to the rotation axis.

[0008] In some embodiments, the angle between the longitudinal step surface and a plane perpendicular to the rotation axis is α, and 30°≤α≤90°.

[0009] In some embodiments, the axial projection shape of the stirring blade is fan-shaped.

[0010] In some embodiments, the central angle β of the sector is in the range of 30°≤β≤150°

[0011] In some embodiments, the stirring blade has a thickness ranging from 2 to 10 mm.

[0012] The present application also includes a cooking device, including an inner pot, a microwave generator arranged on the inner pot, a waveguide box connected to the microwave generator, and a microwave stirrer located at the microwave outlet of the waveguide box, characterized in that the microwave stirrer includes the above-mentioned stirring blade.

[0013] In some embodiments, the multi-step structure of the stirring blade gradually moves away from the microwave outlet from the inside to the outside of the rotation center.

[0014] In some embodiments, the microwave generator, the waveguide box and the microwave agitator are disposed on the top of the inner pot.

[0015] Compared with the prior art, the advantages and positive effects of the utility model are:

[0016] The stirring blade of the above-mentioned microwave stirrer and the multi-step structure of the stirring blade can form multiple reflecting surfaces at different heights, so that the microwaves can be reflected in a larger range, and at the same time the reflected microwaves can cover a larger area, thereby making the microwave distribution in the cooking cavity more uniform, thereby improving the cooking effect of the cooking equipment on the ingredients. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1It is a partial structural schematic diagram of the cooking device of the utility model;

[0019] Figure 2 This is a schematic diagram of the structure inside the inner pot of the cooking device of the utility model;

[0020] Figure 3 for Figure 1 Cross-sectional view of cooking equipment;

[0021] Figure 4 This is a schematic diagram of the structure of the stirring blade of the microwave stirrer of the utility model;

[0022] Figure 5 It is a front view of a stirring blade of the microwave stirrer of the utility model;

[0023] Figure 6 for Figure 5 Cross-section at AA;

[0024] Description of reference numerals:

[0025] Liner 100;

[0026] Microwave generator 200;

[0027] Waveguide box 300;

[0028] Microwave stirrer 400; motor 410; rotating shaft 420;

[0029] Stirring blade 430; shaft mounting hole 431; transverse step surface 432; longitudinal step surface 433;

[0030] Isolation cover 500. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0032] In the description of the present invention, it should be understood that the terms "center", "up", "down", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships 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 should not be understood as a limitation on the present invention.

[0033] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. In the description of the above embodiments, specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0034] Reference Figure 1-Figure 6 , which is an embodiment of the stirring blade 430 of the microwave stirrer of the utility model. The microwave stirrer 400 is arranged in a cooking device with microwave function, such as a microwave oven, a microwave oven, a microwave steam-bake-in-one machine, a microwave steam-bake-in-one machine, and the like.

[0035] like Figure 3 The microwave stirrer 400 includes a motor 410 and a stirring blade 430 connected to the motor shaft of the motor 410. The stirring blade 430 is driven to rotate by the motor 410. The stirring blade 430 is made of metal material and can reflect microwaves in multiple directions, so that the microwaves can be distributed more evenly in the cavity, thereby achieving a better heating effect.

[0036] like Figure 4-Figure 6 , which is the specific structure of the stirring blade 430.

[0037] The stirring blade 430 has a rotation center. Specifically, in the present embodiment, a shaft mounting hole 431 is provided on the stirring blade 430 along its rotation axis. The shaft mounting hole 431 is used to mount the rotating shaft 420, and the rotating shaft 420 is connected to the motor shaft of the motor 410. In other embodiments, the stirring blade 430 may also be connected to the rotating shaft or the motor shaft by other fastening methods such as bonding, welding, fasteners, etc.

[0038] The stirring blade 430 is bent from the inside to the outside in the same direction (upward or downward) from the rotation center to form a multi-step structure, that is, both the front and back sides of the stirring blade 430 form multi-step surfaces. Of the front and back sides of the stirring blade 430, the step surface on one side is used to reflect the microwaves emitted from the microwave generator 200, and the step surface on the other side can reflect the microwaves reflected back from the inner pot 100.

[0039] The stirring blade 430 of the above-mentioned microwave stirrer, the multi-step structure of the stirring blade 430 can form multiple reflecting surfaces at different heights, so that the microwaves can be reflected in a larger range, and at the same time, the reflected microwaves can cover a larger area, thereby making the microwave distribution in the cooking cavity more uniform, thereby improving the cooking effect of the cooking equipment on the ingredients.

[0040] In this embodiment, each step of the multi-step structure has a transverse step surface 432 and a longitudinal step surface 433 .

[0041] The multiple transverse step surfaces 432 of the multi-step structure are all planes. The transverse step surface 432 of the stirring blade 430 is a plane structure, which is simple in structure and easy to manufacture.

[0042] In some embodiments, the plurality of transverse step surfaces 432 of the multi-step structure may all be vertical planes perpendicular to the rotation axis.

[0043] In other embodiments, the multiple transverse step surfaces 432 of the multi-step structure can all be inclined planes that are not perpendicular to the rotation axis. Since the reflection direction of the microwave is perpendicular to the surface of the stirring blade 430, the microwave can be reflected to different directions by the inclined reflection surface, so that the distribution of the reflected microwave is more uniform.

[0044] In other embodiments, part of the transverse step surface 432 of the multi-step structure is a vertical plane perpendicular to the rotation axis, and part of the transverse step surface 432 is an inclined plane not perpendicular to the rotation axis.

[0045] See also Figure 6 In this embodiment, the stirring blade 430 is a three-step structure. The innermost transverse step surface 432 is a vertical plane perpendicular to the rotation axis, and the two outer transverse step surfaces 432 are inclined planes. The inclined planes are arranged to be inclined downward from the inside to the outside. The innermost transverse step surface 432 is perpendicular to the vertical plane of the rotation axis, and a shaft mounting hole 431 is provided on it to facilitate installation and fixation with the rotating shaft 420. The outer transverse step surface 432 is an inclined plane, which can make the reflected microwave cover a larger area and make the microwave distribution more uniform.

[0046] In other embodiments, the multiple transverse step surfaces 432 of the multi-step structure are all curved surfaces, such as arc surfaces. Since the microwaves are reflected by the stirring blade 430 in a direction perpendicular to the surface of the stirring blade 430, the microwaves can be reflected in different directions by the curved reflection surface, so that the reflected microwaves can cover a larger area and the reflected microwaves are more evenly distributed.

[0047] In other embodiments, the plurality of transverse step surfaces 432 of the multi-step structure may also be a combination of a plane and a curved surface, that is, some of the transverse step surfaces 432 are planes, and some of the transverse step surfaces 432 are curved surfaces.

[0048] In this embodiment, if Figure 6As shown, the angle between the longitudinal step surface 433 and the plane perpendicular to the rotation axis is α, and 30°≤α≤90°. Preferably, α is 60°, and the longitudinal step surface 433 is an inclined surface, which can further increase the coverage area of ​​the reflected microwaves and further improve the uniformity of microwave reflection.

[0049] In this embodiment, if Figure 5 As shown, the axial projection shape of the stirring blade 430 is a fan-shaped. The central angle β of the fan-shaped is in the range of 30°≤β≤150°. When the central angle β is between 30° and 150°, the stirring blade 430 can more fully cover and stir the space inside the cooking cavity, which helps the microwaves to diffuse and reflect more evenly in all directions, thereby improving the uniformity and efficiency of microwave heating of the food. Preferably, β is 120°, so that the area utilization of the stirring blade 430 and the effect of microwave reflection and diffusion can achieve a better balance, thereby further optimizing the overall performance of the cooking appliance.

[0050] In other embodiments, the axial projection shape of the stirring blade 430 is not limited to a sector shape, and may be a regular shape such as a disc shape, an ellipse shape, or other irregular shapes with a plurality of hollow areas in the middle.

[0051] In this embodiment, the thickness of the stirring blade 430 ranges from 2 to 10 mm. Preferably, it is 5 mm. If the thickness of the stirring blade 430 is too thick, it is not conducive to the bending operation of the stirring blade 430, and too thick will increase the moment of inertia, requiring a larger drive motor 410, and increasing energy consumption. If the thickness of the stirring blade 430 is too thin, the mechanical stability is poor during high-speed rotation, and it is easy to be deformed or damaged due to centrifugal force.

[0052] For the stirring blade of the present application and the existing stirring blade, uniformity tests were conducted at five locations on the inner pot at the same time, as shown in Table 1 below. According to Table 1, the stirring blade of the present application has little difference in heating effect on food at different test locations of the inner pot, indicating that the stirring blade of the present application can make the microwave more evenly distributed in the inner pot.

[0053] Table 1 Uniformity test of the existing stirring blade and the stirring blade of the present application at different positions in the inner pot for different types of food

[0054]

[0055] like Figure 1-Figure 3 As shown, the utility model also includes a cooking device, which includes an inner pot 100 , a microwave generator 200 disposed on the inner pot 100 , a waveguide box 300 connected to the microwave generator 200 , and a microwave stirrer 400 installed at a microwave outlet of the waveguide box 300 .

[0056] The microwave stirrer 400 includes a motor 410 , a rotating shaft 420 , and a stirring blade 430 . The motor shaft of the motor 410 is connected to the stirring blade 430 through the rotating shaft 420 .

[0057] In this embodiment, the microwave generator 200, the waveguide box 300 and the microwave stirrer 400 are arranged on the top of the inner pot 100. An isolation cover 500 is arranged on the inner side of the top of the inner pot, and a stirring blade is arranged in the isolation cover 500.

[0058] The multi-step structure of the stirring blade 430 gradually moves away from the microwave outlet from the inside to the outside of the rotation center, which is conducive to the microwave scattering in multiple directions and angles around, thereby improving the microwave reflection and dispersion effect.

[0059] 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 stirring blade for a microwave stirrer, characterized in that: The stirring blade has a rotation center; the stirring blade is bent from the inside to the outside from the rotation center to form a multi-step structure.

2. The stirring blade of the microwave stirrer according to claim 1, characterized in that: Each step of the multi-step structure has a transverse step surface and a longitudinal step surface; The multiple transverse step surfaces of the multi-step structure are all planes; or, The multiple transverse step surfaces of the multi-step structure are all curved surfaces; or, Part of the transverse step surfaces of the multi-step structure are planes, and part of the transverse step surfaces are curved surfaces.

3. The stirring blade of the microwave stirrer according to claim 2, characterized in that: The multiple transverse step surfaces of the multi-step structure are all vertical planes perpendicular to the rotation axis; or, The multiple transverse step surfaces of the multi-step structure are all inclined planes that are not perpendicular to the rotation axis; or, Part of the transverse step surfaces of the multi-step structure are vertical planes perpendicular to the rotation axis, and part of the transverse step surfaces are inclined planes not perpendicular to the rotation axis.

4. The stirring blade of the microwave stirrer according to claim 2 or 3, characterized in that: The included angle between the longitudinal step surface and a plane perpendicular to the rotation axis is α, and 30°≤α≤90°.

5. The stirring blade of the microwave stirrer according to claim 1, characterized in that: The axial projection shape of the stirring blade is a fan shape.

6. The stirring blade of the microwave stirrer according to claim 5, characterized in that: The central angle β of the sector is in the range of 30°≤β≤150°.

7. The stirring blade of the microwave stirrer according to claim 6, characterized in that: The thickness of the stirring blade is in the range of 2-10 mm.

8. A cooking device, comprising an inner pot, a microwave generator disposed on the inner pot, a waveguide box connected to the microwave generator, and a microwave stirrer located at a microwave outlet of the waveguide box, characterized in that: The microwave stirrer comprises the stirring blade according to any one of claims 1 to 7.

9. The cooking device according to claim 8, characterized in that The multi-step structure of the stirring blade gradually moves away from the microwave outlet from the inside to the outside of the rotation center.

10. The cooking device according to claim 8, characterized in that The microwave generator, the waveguide box and the microwave stirrer are arranged on the top of the inner pot.

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