CN221010339U - Stirring antenna and microwave cooking appliance - Google Patents

Abstract

The utility model discloses a stirring antenna and a microwave cooking appliance. The whip antenna includes a planar portion and a convex portion. The convex portion is connected with the plane portion and protrudes from the plane portion. Above-mentioned stirring antenna has and compares in the convex part of plane portion, and stirring antenna installs microwave cooking appliance, and the motor is connected to plane portion, and stirring antenna is rotatory, and the microwave field of direction of height can be allocated to the convex part, improves the homogeneity of heating to can solve the inhomogeneous or the too big problem of upper and lower difference in temperature about when heating food, promote microwave cooking appliance heating effect.

Description

Stirring antenna and microwave cooking appliance

Technical Field

The utility model relates to the technical field of kitchen appliances, in particular to a stirring antenna and a microwave cooking appliance.

Background

The microwave oven is a common kitchen appliance for rapidly heating food, the stirring antenna is an important medium for radiating microwaves in the waveguide tube into the cavity, and is also a key component for improving the microwave heating uniformity.

Disclosure of utility model

The embodiment of the utility model provides a stirring antenna and a microwave cooking appliance to solve at least one technical problem.

A whip antenna of an embodiment of the present utility model includes a planar portion and a convex portion.

The convex portion is connected with the plane portion and protrudes from the plane portion.

Above-mentioned stirring antenna has and compares in the convex part of plane portion, and stirring antenna installs microwave cooking appliance, and the motor is connected to plane portion, and stirring antenna is rotatory, and the microwave field of direction of height can be allocated to the convex part, improves the homogeneity of heating to can solve the inhomogeneous or the too big problem of upper and lower difference in temperature about when heating food, promote microwave cooking appliance heating effect.

In some embodiments, the protrusion protrudes in the first direction by a height of 1/4 of the microwave wavelength within the cooking cavity as compared to the planar portion.

In certain embodiments, the protrusion comprises an annular protrusion, or a plurality of the protrusions arranged in an array.

In some embodiments, the convex portion includes a plurality of the annular convex portions, the plurality of annular convex portions are concentrically arranged, and the annular convex portion located at the innermost side is connected to the periphery of the planar portion.

In some embodiments, the annular protrusion has an annular width equal to the distance between two opposing sides of two adjacent annular protrusions.

In certain embodiments, the annular protrusion has a ring width selected from the range [10mm,30mm ], and the distance between opposing sides of two adjacent annular protrusions is selected from the range [10mm,30mm ].

In certain embodiments, the planar portion is cylindrical and the diameter of the planar portion is selected from the range [15mm,20mm ].

In certain embodiments, the stirring antenna comprises a circular stirring antenna having a diameter of no greater than 220mm.

The microwave cooking appliance comprises a cavity, a microwave emitting device and an antenna assembly, wherein the antenna assembly comprises a motor and the stirring antenna of any one of the above embodiments, the motor is connected with the stirring antenna, and the microwave emitting device is connected with the stirring antenna through a waveguide tube so as to transmit microwaves to the stirring antenna.

In some embodiments, a connecting hole is formed in the center of the plane portion, and an output shaft of the motor penetrates through the connecting hole.

In the microwave cooking appliance, the stirring antenna is provided with the convex part which is protruded compared with the plane part, the convex part can be used for adjusting the microwave field in the height direction, and the heating uniformity is improved, so that the problem of uneven upper and lower or overlarge upper and lower temperature difference during heating food can be solved, and the heating effect of the microwave cooking appliance is improved.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The foregoing and/or additional aspects and advantages of the present utility model will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, in which:

fig. 1 is a schematic structural view of a microwave cooking appliance according to an embodiment of the present utility model;

Fig. 2 is a schematic view of a part of a structure of a microwave cooking appliance according to an embodiment of the present utility model;

fig. 3 is a schematic structural view of a whip antenna according to an embodiment of the present utility model;

FIG. 4 is a schematic cross-sectional view of a whip antenna of an embodiment of the utility model;

fig. 5 is a partial structural schematic diagram of a related art microwave cooking appliance.

Description of main reference numerals:

The stirring antenna-10, the plane part-12, the convex part-14, the cavity-16, the cooking cavity-18, the antenna component-20, the motor-22, the waveguide tube-24, the inner baffle-25, the connecting hole-26 and the output shaft-28.

Microwave cooking appliance-100.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only for explaining the present utility model and are not to be construed as limiting the present utility model.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the description of the present utility model, it should be noted that the terms "mounted," "connected," and "coupled" are to be construed broadly, as well as, for example, fixedly coupled, detachably coupled, or integrally coupled, unless otherwise specifically indicated and defined. Either mechanically or electrically. Can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

The disclosure herein provides many different embodiments or examples for implementing different structures of the utility model. To simplify the present disclosure, components and arrangements of specific examples are described herein. They are, of course, merely examples and are not intended to limit the utility model. Furthermore, the present utility model may repeat reference numerals and/or letters in the various examples, which are for the purpose of brevity and clarity, and which do not themselves indicate the relationship between the various embodiments and/or arrangements discussed. In addition, the present utility model provides examples of various specific processes and materials, but one of ordinary skill in the art will recognize the application of other processes and/or the use of other materials.

Referring to fig. 1 and 4, a whip antenna 10 according to an embodiment of the present utility model includes a planar portion 12 and a convex portion 14. The protrusion 14 connects the planar portion 12 and protrudes from the planar portion 12.

The above-mentioned whip antenna 10 has a convex portion 14 protruding from a planar portion 12, the whip antenna 10 is mounted to the microwave cooking appliance 100, and the planar portion 12 is connected to a motor 22. The stirring antenna 10 rotates, and the convex part 14 can allocate a microwave field in the height direction, so that heating uniformity is improved, and the problems of uneven upper and lower directions or overlarge upper and lower temperature differences during food heating can be solved, and the heating effect of the microwave cooking electric appliance 100 is improved.

In particular, a related art microwave oven (microwave oven/microwave) is a modern cooking hob for heating food with microwaves. Microwaves are an electromagnetic wave. The microwave oven is composed of a power supply, a magnetron, a control circuit, and a cooking chamber 18. The power supply supplies a high voltage of about 4000 volts to the magnetron, which continuously generates microwaves when energized by the power supply, and the magnetron is connected to the whip antenna 10 through the waveguide 24 to transmit the microwaves to the whip antenna 10, and then the whip antenna 10 emits the microwaves to various places of the cooking cavity 18 during rotation to heat the food in the cooking cavity 18.

However, the microwave oven often has heating non-uniformity during the heating and use process, and particularly, the heating non-uniformity is more obvious by using the planar stirring antenna.

For example, in the height direction, a schematic diagram of hot spot distribution when the planar-type stirring antenna of the related art is operated is shown in fig. 5, in which circles represent hot spot distribution in the cooking cavity 18. The distance between the hot spots is 1/2 of the wavelength of the microwaves in cooking cavity 18, about 6cm. The large distance between the two hot spots in the height direction may cause uneven heating of the food when the food is heated.

Based on the above-described problems, the embodiment of the present utility model provides a whip antenna 10 including a planar portion 12 and a convex portion 14. The convex portion 14 protrudes in the first direction compared to the planar portion 12 so that the microwave radiation surface of the whip antenna 10 has a height difference in the first direction, whereby the distance between hot spots can be reduced in the height direction, and the heating unevenness can be improved. Fig. 2 is a schematic diagram of hot spot distribution when the stirring antenna 10 according to the embodiment of the present utility model is in operation.

In some embodiments, the height of protrusion 14 protruding in the first direction as compared to planar portion 12 is 1/4 of the wavelength of the microwaves within cooking cavity 18.

Thus, the microwave field in the height direction can be allocated, and the heating uniformity is improved.

Specifically, the hot spot interval of the whip antenna 10 in the height direction is 1/2 wavelength, and the microwave radiation surface of the whip antenna 10 has a height difference of 1/4 wavelength, and the hot spot interval in the height direction is shortened, so that the heating is more uniform.

In other embodiments, the protrusion 14 has a plurality of different heights that protrude in the first direction as compared to the planar portion 12. Under the condition of ensuring the overall size of the stirring antenna 10, the stirring antenna has a plurality of convex structures with inconsistent heights, so that the microwave field in the height direction can be allocated, and the effect of improving the heating uniformity is better.

Referring to fig. 3 and 4, in some embodiments, the protrusion 14 comprises an annular protrusion 14, or a plurality of protrusions 14 arranged in an array.

In this way, it is possible to achieve a height difference on the microwave radiation surface of the whip antenna 10.

Specifically, the first direction is the up-down direction shown in fig. 1. The whip antenna 10 is processed in the first direction to obtain the whip antenna 10 having the structure of the convex portion 14. The structure of the convex portion 14 realizing the height difference on the microwave radiation surface may be of various forms. For example, the projection 14 structure may be an annular projection 14 formed of continuous projections. Or may be a ring-shaped structure formed by discrete protrusions. Or may be an array of raised structures.

In one embodiment, the whip antenna 10 includes a plurality of projections 14 arranged in an array. The height of each protrusion 14 in the first direction may be the same or different, and is not particularly limited herein.

In one embodiment, the convex portion 14 on the stirring antenna 10 is processed by using a stamping process, so that the annular convex portion 14 is small in processing difficulty, easy to form and convenient for batch processing.

In some embodiments, the projection 14 includes a plurality of annular projections 14, the plurality of annular projections 14 being concentrically disposed, the innermost annular projection 14 being connected to the periphery of the planar portion 12.

In this way, the stirring antenna 10 has a symmetrical structure, and the stirring antenna 10 rotates and has a more stable structure when in operation.

Specifically, the whip antenna 10 includes a plurality of concentric annular convex portions 14, the planar portion 12 is cylindrical at a central portion of the annular convex portions 14, and a center of the planar portion 12 coincides with a center of the annular convex portions 14, that is, the two concentric annular convex portions 14 are symmetrical along a center of the planar portion 12. With the whip antenna 10 mounted to the microwave cooking appliance 100, the planar portion 12 of the whip antenna 10 is perforated at the center and mounted to the output shaft 28 of the motor 22. As such, the whip antenna 10 may be considered symmetrical along the output shaft 28 of the motor 22. When the microwave cooking appliance 100 works, the motor 22 drives the output shaft 28 to rotate, the stirring antenna 10 rotates around the output shaft 28, so that the structure of the antenna assembly 20 formed by the stirring antenna 10 and the motor 22 is more stable, and the influence of centrifugal force generated during rotation on the output shaft 28 is reduced.

In one embodiment, the whip antenna 10 includes two concentric annular protrusions 14, with the inner annular protrusion being attached to the periphery of the planar portion 12. It will be appreciated that the whip antenna 10 provided by embodiments of the present utility model is not limited to having two concentric annular projections 14. The number of annular projections 14 may be three or more, under the conditions of size, process satisfaction. The size of the whip antenna 10 is generally not larger than the size of the food heating pan. In one embodiment, the diameter of the whip antenna 10 is 120-150mm in view of cost and the like.

In some embodiments, the annular projection 14 has an annular width equal to the distance between the opposing sides of two adjacent annular projections 14.

In this way, the same radiant energy of the planar portion 12 and the convex portion 14 can be ensured.

Specifically, the annular width of the annular projection 14 and the distance between the opposing sides of two adjacent annular projections 14 can affect the amount of radiant energy. The design of the annular protrusion 14 with the same annular width as the distance between the two opposite sides of the adjacent annular protrusions 14 ensures that the planar portion 12 and the protrusions 14 radiate the same energy, thereby making the energy radiated into the cooking cavity 18 uniform when the whipping antenna 10 is in operation.

In certain embodiments, the annular width of annular projection 14 is selected from the range [10mm,30mm ], and the distance between opposing sides of adjacent two annular projections 14 is selected from the range [10mm,30mm ].

In this way, it is possible to prevent the whipping antenna 10 from being oversized while ensuring the radiation function of the whipping antenna 10.

Specifically, the face formed by the annular width of the annular convex portion 14 and the distance between the opposite sides of the adjacent two annular convex portions 14 is used for radiating microwaves, and the magnitude of the annular width and the distance between the opposite sides of the adjacent two annular convex portions 14 affects the radiation energy magnitude. The annular width and the distance from the edges of the two annular protrusions 14 are defined while ensuring the overall size of the whip antenna 10, so as to prevent the whip antenna 10 from being oversized while ensuring the radiation function of the whip antenna 10.

As shown in fig. 4, the annular projection 14 has a ring width L1 and the distance between the opposite sides of two adjacent annular projections 14 is L2. The annular width of the annular convex portion 14 and the distance l1=l2 between the opposite sides of the adjacent two annular convex portions 14. L1 and L2 may be 10mm, 12mm, 13mm, 15mm, 18mm, 22mm, 25mm, 27mm, 29mm or 30mm, or any other value within the range [10mm,30mm ].

In certain embodiments, the planar portion 12 is cylindrical and the diameter of the planar portion 12 is selected from the range [15mm,20mm ].

In this way, it is ensured that the planar portion 12 has sufficient space to connect with the output shaft 28 of the motor 22.

Specifically, the planar portion 12 is at the center of the whip antenna 10 for connection with the output shaft 28 of the motor 22. The dimensions of the planar portion 12 affect the fit with the motor 22. The planar portion 12 is sized to ensure that the planar portion 12 has sufficient space to connect with the output shaft 28 of the motor 22. As shown in fig. 4, the diameter of the planar portion 12 is D1. The diameter of the planar portion 12 may be 15mm, 15.5mm, 16mm, 16.5mm, 17mm, 18mm, 18.5mm, 19mm, 19.5mm or 20mm, or any other value within the range [15mm,20mm ].

In one embodiment, the planar portion 12 is riveted to the output shaft 28 of the motor 22. The plane portion 12 is provided with a caulking hole having a hole diameter of 13mm, and therefore, the dimension of the plane portion 12 at the center of the whip antenna 10 may be any value in the range of 15mm,20 mm.

In certain embodiments, the stirring antenna 10 comprises a circular stirring antenna 10, the circular stirring antenna 10 having a diameter of no more than 220mm.

In this way, the stirring antenna 10 is prevented from being too small in distance from the peripheral wall surface to cause a problem such as ignition.

Specifically, the circular stirring antenna 10 has the largest radiation area and good radiation effect under the fixed space size. As shown in fig. 4, the diameter D2 of the circular stirring antenna 10 is not more than 220mm, and the problem of ignition due to too small distance from the surrounding wall surface is prevented.

In other embodiments, the minimum distance of the circular stirring antenna 10 from the surrounding metal surface is 10mm, limited by the width of the position where the stirring antenna 10 is located, in order to avoid problems such as ignition. The diameter of the circular stirring antenna 10 may be determined according to the size of the cavity 16 of the microwave cooking appliance 100.

In summary, the whip antenna 10 is provided with the convex portion 14 protruding from the planar portion 12. After the stirrer antenna 10 is mounted to the microwave cooking appliance 100, the planar portion 12 is connected to the motor 22. The stirring antenna 10 rotates, and the convex part 14 can allocate a microwave field in the height direction, so that heating uniformity is improved, and the problems of uneven upper and lower directions or overlarge upper and lower temperature differences during food heating can be solved, and the heating effect of the microwave cooking electric appliance 100 is improved.

A microwave cooking appliance 100 according to an embodiment of the present utility model includes a cavity 16, a microwave emitting device (not shown) and an antenna assembly 20, the antenna assembly 20 includes a motor 22 and the stirring antenna 10 of any of the above embodiments, the motor 22 is connected to the stirring antenna 10, and the microwave emitting device is connected to the stirring antenna 10 through a waveguide 24 to transmit microwaves to the stirring antenna 10.

Specifically, as shown in fig. 1, a cooking cavity 18 is formed in a cavity 16 of a microwave cooking appliance 100. The antenna assembly 20 is mounted below the cavity 16, and an inner partition 25 of the cavity 16 separates the antenna assembly 20 from the cooking cavity 18.

In some embodiments, the center of the planar portion 12 defines a connecting aperture 26, and an output shaft 28 of the motor 22 extends through the connecting aperture 26.

In this way, the whip antenna 10 is symmetrical along the output shaft 28 of the motor 22, and is structurally stable.

Specifically, the planar portion 12 of the whip antenna 10 is provided with a connecting hole 26 at the center, and is mounted to an output shaft 28 of the motor 22. As such, the whip antenna 10 may be considered symmetrical along the output shaft 28 of the motor 22. When the microwave cooking appliance 100 works, the motor 22 drives the output shaft 28 to rotate, the stirring antenna 10 rotates around the output shaft 28, so that the structure of the antenna assembly 20 formed by the stirring antenna 10 and the motor 22 is more stable, and the influence of centrifugal force generated during rotation on the output shaft 28 is reduced.

In the above-mentioned microwave cooking appliance 100, the stirring antenna 10 has the protruding portion 14 protruding from the planar portion 12, and the protruding portion 14 can be used to allocate the microwave field in the height direction, so as to improve the heating uniformity, thereby solving the problem of uneven upper and lower or overlarge upper and lower temperature difference when heating food, and improving the heating effect of the microwave cooking appliance 100.

Specifically, the microwave cooking appliance 100 includes a microwave oven and other cooking appliances having a microwave heating function.

The above explanation of the embodiment and advantageous effects of the whip antenna 10 is also applicable to the microwave cooking appliance 100 according to the embodiment of the present utility model, and is not developed in detail to avoid redundancy.

In the description of the present specification, reference is made to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., meaning that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present utility model have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the utility model, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the utility model.

Claims (9)

1. A whip antenna comprising:

A planar portion;

And the convex parts are connected with the plane parts and protrude out compared with the plane parts, and comprise annular convex parts or a plurality of convex parts which are arranged in an array.

2. The whip antenna of claim 1, wherein the protrusion protrudes in the first direction by a height of 1/4 of the microwave wavelength in the cooking cavity as compared to the planar portion.

3. The whip antenna of claim 1, wherein the protrusion comprises a plurality of the annular protrusions, the plurality of annular protrusions being concentrically disposed, the innermost annular protrusion being attached to the periphery of the planar portion.

4. A whip antenna as claimed in claim 3, wherein the annular protrusion has an annular width equal to the distance between the opposite sides of adjacent two of the annular protrusions.

5. The whip antenna of claim 4, wherein the annular protrusion has a loop width selected from the range of [10mm,30mm ], and the distance between opposing sides of adjacent two of the annular protrusions is selected from the range of [10mm,30mm ].

6. A whip antenna as claimed in claim 3, wherein the planar portion is cylindrical and the diameter of the planar portion is selected from the range [15mm,20mm ].

7. The whip antenna of claim 1, wherein the whip antenna comprises a circular whip antenna having a diameter of no greater than 220mm.

8. A microwave cooking appliance, comprising:

the cavity is internally provided with a cooking cavity;

A microwave emitting device;

an antenna assembly comprising a motor and the whip antenna of any of claims 1-7, the motor being connected to the whip antenna, the microwave emitting device being connected to the whip antenna by a waveguide for transmitting microwaves to the whip antenna.

9. The microwave cooking appliance according to claim 8, wherein a connection hole is formed in the center of the planar portion, and an output shaft of the motor penetrates through the connection hole.