阅读说明：本技术 微波烹饪器具和微波烹饪器具的搅拌天线组件 (Microwave cooking utensil and stirring antenna subassembly of microwave cooking utensil ) 是由 首军 刘奇 胡广川 于 2021-08-24 设计创作，主要内容包括：本发明公开了一种微波烹饪器具和微波烹饪器具的搅拌天线组件,微波烹饪器具包括：壳体,壳体内限定有烹饪腔；微波发射装置,设在壳体内；搅拌天线,可转动地设在烹饪腔内,微波发射装置与搅拌天线相连以向搅拌天线传输微波,搅拌天线包括搅拌片天线以及辅助天线,搅拌片天线在参考面上的投影不超出辅助天线在参考面上的投影,参考面为平行于搅拌片天线的水平面,辅助天线被构造成在上下方向上可往复运动；驱动装置,与搅拌天线传动连接。根据本发明的微波烹饪器具,通过设置动态的搅拌天线,搅拌天线包括辅助天线和搅拌片天线,辅助天线在上下方向上可往复运动,可实现微波烹饪器具的均匀加热。且结构简单,可靠性高,能够提高微波加热均匀性。(The invention discloses a microwave cooking appliance and a stirring antenna assembly of the microwave cooking appliance, wherein the microwave cooking appliance comprises: a housing defining a cooking chamber therein; the microwave transmitting device is arranged in the shell; the stirring antenna is rotatably arranged in the cooking cavity, the microwave transmitting device is connected with the stirring antenna to transmit microwaves to the stirring antenna, the stirring antenna comprises a stirring sheet antenna and an auxiliary antenna, the projection of the stirring sheet antenna on a reference surface does not exceed the projection of the auxiliary antenna on the reference surface, the reference surface is a horizontal plane parallel to the stirring sheet antenna, and the auxiliary antenna is constructed to be capable of reciprocating in the up-down direction; and the driving device is in transmission connection with the stirring antenna. According to the microwave cooking appliance, the dynamic stirring antenna is arranged and comprises the auxiliary antenna and the stirring sheet antenna, the auxiliary antenna can reciprocate in the vertical direction, and uniform heating of the microwave cooking appliance can be realized. And the structure is simple, the reliability is high, and the microwave heating uniformity can be improved.)

1. A microwave cooking appliance, comprising:

a housing defining a cooking chamber therein;

the microwave transmitting device is arranged in the shell;

the stirring antenna is rotatably arranged in the cooking cavity, the microwave transmitting device is connected with the stirring antenna to transmit microwaves to the stirring antenna, the stirring antenna comprises a stirring sheet antenna and an auxiliary antenna, the projection of the stirring sheet antenna on a reference surface does not exceed the projection of the auxiliary antenna on the reference surface, the reference surface is a horizontal plane parallel to the stirring sheet antenna, and the auxiliary antenna is constructed to be capable of reciprocating in the up-down direction;

and the driving device is in transmission connection with the stirring antenna.

2. The microwave cooking appliance of claim 1, wherein the stirring antenna further comprises: and the auxiliary antenna is connected with the stirring support.

3. The microwave cooking appliance of claim 2, wherein the agitator frame is a one-piece plastic piece and includes:

a support ring;

the landing leg, it is a plurality of the landing leg is located respectively the periphery of support ring, supplementary antenna with the landing leg links to each other.

4. The microwave cooking appliance of claim 3, wherein the leg is formed with a connecting post and the auxiliary antenna is formed with a connecting hole, the connecting post being an interference fit with the connecting hole.

5. The microwave cooking appliance of claim 3, wherein the stirring antenna further comprises:

the stirring shaft, the both ends of (mixing) shaft respectively with stirring piece antenna and drive arrangement links to each other, the stirring support with the (mixing) shaft links to each other.

6. The microwave cooking appliance of claim 5, wherein the agitator shaft is coupled to the agitator frame by a transmission structure to allow the auxiliary antenna to rotate relative to the agitator shaft.

7. The microwave cooking appliance of claim 6, wherein the transmission structure comprises a protrusion and a groove, wherein the protrusion is formed at one of the support ring and the stirring shaft, and the groove matching the protrusion is formed at the other.

8. The microwave cooking appliance according to any one of claims 1 to 7, wherein the auxiliary antenna is formed as a metallic coupling ring, the driving means is a motor, the inner bottom wall of the housing is provided with a fixing bracket, and the stirring bracket is rotatably connected to the fixing bracket through a meshing tooth structure to reciprocate the auxiliary antenna up and down.

9. The microwave cooking appliance of claim 8, wherein the meshing tooth structure comprises a male tooth and a female tooth, the stirring rack and the fixing rack are both provided with the male tooth and the female tooth, the male tooth on the stirring rack meshes with the female tooth on the fixing rack, and the female tooth on the stirring rack meshes with the male tooth on the fixing rack;

the tooth thickness of the convex teeth along the up-down direction is T, the reciprocating distance of the auxiliary antenna in the up-down direction is L, and L is 2T.

10. A stirring antenna assembly of a microwave cooking appliance, comprising:

the stirring antenna is rotatably arranged in a cooking cavity of the microwave cooking appliance and comprises a stirring sheet antenna and an auxiliary antenna, the projection of the stirring sheet antenna on a reference surface does not exceed the projection of the auxiliary antenna on the reference surface, the reference surface is a horizontal plane parallel to the stirring sheet antenna, and the auxiliary antenna is constructed to be capable of reciprocating in the vertical direction;

the auxiliary antenna is connected with the stirring bracket;

the stirring shaft, the both ends of (mixing) shaft respectively with stirring piece antenna and drive arrangement links to each other, the stirring support with the (mixing) shaft links to each other.

Technical Field

The invention relates to the technical field of electric appliance manufacturing, in particular to a microwave cooking appliance and a stirring antenna assembly of the microwave cooking appliance.

Background

In the related art, a microwave oven (microwave oven/microwave), as the name implies, is a modern cooking stove for heating food by microwave. However, the microwave oven often has uneven heating during heating.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art. To this end, an object of the present invention is to propose a microwave cooking appliance, the heating uniformity of which is improved.

Another object of the present invention is to propose a stirring antenna assembly of a microwave cooking appliance.

According to an embodiment of the first aspect of the present invention, a microwave cooking appliance includes: a housing defining a cooking chamber therein; the microwave transmitting device is arranged in the shell; the stirring antenna is rotatably arranged in the cooking cavity, the microwave transmitting device is connected with the stirring antenna to transmit microwaves to the stirring antenna, the stirring antenna comprises a stirring sheet antenna and an auxiliary antenna, the projection of the stirring sheet antenna on a reference surface does not exceed the projection of the auxiliary antenna on the reference surface, the reference surface is a horizontal plane parallel to the stirring sheet antenna, and the auxiliary antenna is constructed to be capable of reciprocating in the up-down direction; and the driving device is in transmission connection with the stirring antenna.

According to the microwave cooking appliance of the embodiment of the invention, the stirring antenna comprises the stirring sheet antenna and the auxiliary antenna, the outer contour of the auxiliary antenna is not smaller than that of the stirring sheet antenna, and the auxiliary antenna is formed to be capable of reciprocating in the vertical direction; during the rotation of the stirring antenna, the auxiliary antenna can form surface current by the action of the microwave field, and then the changed current further radiates microwaves into the cooking cavity. In addition, this application can increase stirring antenna bandwidth through set up supplementary antenna around stirring piece antenna, and the microwave output efficiency that can promote stirring antenna is disturbed from top to bottom in the perpendicular in addition, improves the homogeneity of heating. Compare in single stirring piece antenna among the prior art, this application has increased the area of stirring antenna, is favorable to improving microwave transmission efficiency, improves the homogeneity of microwave cooking utensil heating. Therefore, the technical problem that field intensity inside the cavity is still unevenly distributed due to the fact that only one static stirring antenna rotates in one plane dimension in the related technology can be solved.

According to the microwave cooking appliance provided by the embodiment of the invention, the dynamic stirring antenna is arranged and comprises the auxiliary antenna and the stirring sheet antenna, and the auxiliary antenna can reciprocate in the vertical direction, so that the uniform heating of the microwave cooking appliance can be realized. And the structure is simple, the reliability is high, and the microwave heating uniformity can be improved.

In addition, the microwave cooking appliance according to the above embodiment of the present invention has the following additional technical features:

in some embodiments of the invention, the whip antenna further comprises: and the auxiliary antenna is connected with the stirring support.

Further, the stirring support is a one-piece plastic part and comprises: a support ring; the landing leg, it is a plurality of the landing leg is located respectively the periphery of support ring, supplementary antenna with the landing leg links to each other.

Further, the landing leg is formed with the spliced pole, supplementary antenna is formed with the connecting hole, the spliced pole with connecting hole interference fit.

In some embodiments of the invention, the whip antenna further comprises: the stirring shaft, the both ends of (mixing) shaft respectively with stirring piece antenna and drive arrangement links to each other, the stirring support with the (mixing) shaft links to each other.

Further, the stirring shaft is connected with the stirring support through a transmission structure, so that the auxiliary antenna rotates relative to the stirring shaft.

Further, the transmission structure comprises a convex part and a groove, wherein the convex part is formed at one position of the support ring and the stirring shaft, and the groove matched with the convex part is formed at the other position of the support ring and the stirring shaft.

In some embodiments of the present invention, the auxiliary antenna is formed as a metal coupling loop, the driving device is a motor, a fixing bracket is provided on an inner bottom wall of the housing, and the stirring bracket is rotatably connected to the fixing bracket through a meshing tooth structure so as to reciprocate the auxiliary antenna up and down.

Furthermore, the meshing tooth structure comprises convex teeth and concave teeth, the stirring support and the fixed support are both provided with the convex teeth and the concave teeth, the convex teeth on the stirring support are meshed with the concave teeth on the fixed support, and the concave teeth on the stirring support are meshed with the convex teeth on the fixed support; the tooth thickness of the convex teeth along the up-down direction is T, the reciprocating distance of the auxiliary antenna in the up-down direction is L, and L is 2T.

According to a second aspect of the present invention, an agitation antenna assembly of a microwave cooking appliance includes: the stirring antenna is rotatably arranged in a cooking cavity of the microwave cooking appliance and comprises a stirring sheet antenna and an auxiliary antenna, the projection of the stirring sheet antenna on a reference surface does not exceed the projection of the auxiliary antenna on the reference surface, the reference surface is a horizontal plane parallel to the stirring sheet antenna, and the auxiliary antenna is constructed to be capable of reciprocating in the vertical direction; the auxiliary antenna is connected with the stirring bracket; the stirring shaft, the both ends of (mixing) shaft respectively with stirring piece antenna and drive arrangement links to each other, the stirring support with the (mixing) shaft links to each other.

Additional aspects and advantages of the invention 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 invention.

Drawings

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

fig. 1 is a perspective view of a partial structure of a microwave cooking appliance according to an embodiment of the present invention, in which a stirrer antenna is not shown;

FIG. 2 is a perspective view of another partial structure of a microwave cooking appliance according to an embodiment of the present invention, in which a stirrer antenna is shown;

fig. 3 is a perspective view of a stirring support in the microwave cooking appliance according to the embodiment of the present invention in fig. 2;

fig. 4 is an exploded view of a stirrer antenna in the microwave cooking appliance according to the embodiment of the present invention in fig. 2;

fig. 5 is an exploded view of the stirrer antenna and the fixing bracket and the driving device of the microwave cooking appliance of fig. 2 according to the embodiment of the present invention;

FIG. 6 is a schematic view of a stirrer antenna of a microwave cooking appliance in one position according to an embodiment of the present invention;

fig. 7 is a schematic view of a stirrer antenna of a microwave cooking appliance according to an embodiment of the present invention in another position;

fig. 8 is a schematic view of a stirrer antenna of a microwave cooking appliance according to an embodiment of the present invention in a further position;

fig. 9 is a schematic view of a microwave cooking appliance according to an embodiment of the present invention;

fig. 10 is an exploded view of a stirring antenna assembly of a microwave cooking appliance according to an embodiment of the present invention;

fig. 11 is a schematic view of a prior art microwave cooking appliance in which the same components as the present application are distinguished by the addition of a prime (').

Reference numerals:

100. a microwave cooking appliance;

1. a housing; 11. a cooking cavity; 12. fixing a bracket; 121. a mating hole;

3. a stirring antenna; 31. a stir plate antenna; 311. an arc-shaped slot; 32. an auxiliary antenna; 321. connecting holes; 33. stirring the bracket; 331. a support ring; 3311. a ring body; 3312. a connecting projection; 3313. a rotating shaft hole; 332. a support leg; 3321. Connecting columns; 3322. a body portion; 3323. a first bending portion; 3324. a second bending portion; 34. a stirring shaft;

4. a drive device; 41. a drive shaft;

5. a transmission structure; 51. a convex portion; 52. a groove;

6. a waveguide;

7. a control panel;

8. a meshing tooth structure; 81. a convex tooth; 82. concave teeth;

200. the antenna assembly was stirred.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

The following disclosure provides many different embodiments, or examples, for implementing different features of the invention. To simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. Furthermore, the present invention may repeat reference numerals and/or letters in the various examples. This repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, the present invention provides examples of various specific processes and materials, but one of ordinary skill in the art may recognize the applicability of other processes and/or the use of other materials.

In the related art, a microwave oven (microwave oven/microwave), as the name implies, is a modern cooking stove for heating food by microwave. Microwaves are electromagnetic waves. The microwave oven is composed of power supply, magnetron, control circuit and cooking cavity. The power supply provides about 4000V high voltage to the magnetron, which continuously generates microwave under the excitation of the power supply, and the microwave is coupled into the cooking cavity through the waveguide system. Near the entrance of the cavity, there is a rotatable stirrer, which is a fan-shaped metal, and which has all directional reflections of the microwave after rotating, so that the microwave energy can be uniformly distributed in the cavity, thereby heating the food. The power range of the microwave oven is generally 500-1000W.

However, the microwave oven often has uneven heating during heating, and especially the uneven heating of the flat oven is more obvious. In the conventional flat microwave oven (see fig. 11), microwaves are transmitted to the stirring antenna 3 ' through the waveguide 6 ', and then the stirring antenna 3 ' emits the microwaves to various places of the cooking cavity 11 ' in the rotating process, but actually, in the heating process, the stirring antenna 3 ' only rotates in one dimension, and the phenomenon of uneven heating still exists.

To this end, the present application proposes a microwave cooking appliance 100, wherein the microwave cooking appliance 100 is advantageous to ensure the uniformity of heating. The microwave cooking appliance 100 according to the embodiment of the present invention is described below with reference to the accompanying drawings, the microwave cooking appliance 100 is applied to the field of microwave heating, and the heating uniformity of the microwave cooking appliance 100 is improved.

The microwave cooking appliance 100 according to the embodiment of the first aspect of the present invention includes: the device comprises a shell 1, a microwave transmitting device, a stirring antenna 3 and a driving device 4.

Specifically, the housing 1 defines a cooking chamber 11 therein, and food can be cooked in the cooking chamber 11. The microwave transmitting device is arranged in the shell 1; microwaves can be emitted into the cooking cavity 11 by the microwave emitting device, thereby further cooking of food in the cooking cavity 11 is facilitated.

The stirrer antenna 3 is rotatably provided in the cooking chamber 11, and the microwave transmitting means is connected to the stirrer antenna 3 so that the microwaves can be transmitted to the stirrer antenna 3 by the microwave transmitting means, for example, the microwaves transmitted by the microwave transmitting means can be further transmitted to the stirrer antenna 3 through the waveguide 6 (see fig. 9).

Referring to fig. 5, the stirrer antenna 3 includes a stirrer plate antenna 31 and an auxiliary antenna 32, a projection of the stirrer plate antenna 31 on a reference plane does not exceed a projection of the auxiliary antenna 32 on the reference plane, the reference plane is a horizontal plane parallel to the stirrer plate antenna 31, as in some embodiments, a projection of the stirrer plate antenna 31 on the reference plane does not exceed a projection of the auxiliary antenna 32 on the reference plane, for example, an outer contour of the auxiliary antenna 32 may be larger than an outer contour of the stirrer plate antenna 31. The auxiliary antenna 32 is configured to be reciprocally movable in the up-down direction; the driving device 4 is in transmission connection with the stirring antenna 3. By means of the drive 4 being in driving connection with the stirrer antenna 3, the stirrer antenna 3 can be driven to rotate by the drive 4.

The stirrer antenna 3 of the related art can be rotated only 360 degrees in the dimension of the plane. The stirrer antenna 3 in the present application includes a stirrer antenna 31 and an auxiliary antenna 32, and the outer contour of the auxiliary antenna 32 is not smaller than that of the stirrer antenna 31, and the auxiliary antenna 32 is formed to be capable of reciprocating in the up-down direction; the auxiliary antenna 32 is able to form a surface current by the action of the microwave field during the rotation of the stirring antenna 3, and then the changed current further radiates microwaves into the cooking cavity 11.

The auxiliary antenna 32 can reciprocate up and down while rotating, and the stirring sheet antenna 31 can also rotate 360 degrees in the plane simultaneously, like this through set up auxiliary antenna 32 around stirring sheet antenna 31, can increase stirring antenna 3 bandwidth, and the disturbance is from top to bottom in the vertical plane in addition, can promote stirring antenna 3's microwave output efficiency, improves the homogeneity of heating.

Bandwidth is a basic antenna parameter, and describes the range of frequencies at which an antenna can properly radiate or receive energy. Typically, the required bandwidth is one of the parameters used to select the antenna type. In the field of antennas, the gain and bandwidth can be improved by adding the structure of the auxiliary antenna 32, which is equivalent to coupling energy onto the auxiliary antenna 32, and then the auxiliary antenna 32 radiates into the cooking cavity 11 to supplement the energy, so that the hot spots in the cooking cavity 11 are distributed more uniformly, and the auxiliary antenna 32 is equivalent to the function of a second antenna.

Stirring antenna 3 among the correlation technique can only 360 degrees rotations in the dimension of place plane, and this application has increased the supplementary antenna 32 that can up-and-down motion in the vertical plane, has increased stirring antenna 3's area in other words, and the quantity of the microwave that can radiate has been had much, is favorable to improving microwave transmission efficiency, improves the homogeneity of heating.

Compare in single stirring piece antenna 31 among the prior art, this application has increased stirring antenna 3's area, is favorable to improving microwave transmission efficiency, improves the homogeneity of microwave cooking utensil 100 heating. Therefore, the technical problem that in the related art, as only one static stirring antenna 3 rotates in one plane dimension, the field intensity inside the cavity is still unevenly distributed can be solved.

According to the microwave cooking appliance 100 of the embodiment of the present invention, the stirrer antenna 3 includes the stirrer antenna 31 and the auxiliary antenna 32, and the outer contour of the auxiliary antenna 32 is not smaller than the outer contour of the stirrer antenna 31, and the auxiliary antenna 32 is formed to be reciprocatable in the up-down direction; the auxiliary antenna 32 is able to form a surface current by the action of the microwave field during the rotation of the stirring antenna 3, and then the changed current further radiates microwaves into the cooking cavity 11. In addition, according to the present invention, the auxiliary antenna 32 is provided around the stirring blade antenna 31, so that the bandwidth of the stirring antenna 3 can be increased, and the stirring blade antenna can be disturbed vertically, thereby improving the microwave output efficiency of the stirring antenna 3 and improving the uniformity of heating. Compare in single stirring piece antenna 31 among the prior art, this application has increased stirring antenna 3's area, is favorable to improving microwave transmission efficiency, improves the homogeneity of microwave cooking utensil 100 heating. Therefore, the technical problem that in the related art, as only one static stirring antenna 3 rotates in one plane dimension, the field intensity inside the cavity is still unevenly distributed can be solved.

According to the microwave cooking appliance 100 of the embodiment of the invention, by arranging the dynamic stirring antenna 3, the stirring antenna 3 comprises the auxiliary antenna 32 and the stirring sheet antenna 31, the auxiliary antenna 32 can reciprocate in the up-down direction, and uniform heating of the microwave cooking appliance 100 can be realized. And the structure is simple, the reliability is high, and the microwave heating uniformity can be improved.

In some embodiments of the invention, stirrer antenna 3 further comprises: the stirring support 33 and the auxiliary antenna 32 are connected to the stirring support 33. For example, referring to fig. 3 and 5, the stirrer antenna 3 may further include: the stirring support 33, the auxiliary antenna 32 may be connected to the stirring support 33. This facilitates the mounting of the auxiliary antenna 32 by the stirring support 33.

Further, the stirring bracket 33 is a one-piece plastic member and includes: a support ring 331 and legs 332, the legs 332 being provided on the outer periphery of the support ring 331, respectively, and the auxiliary antenna 32 being connected to the legs 332. For example, referring to fig. 5, the stirring bracket 33 may be an integral plastic part, and the stirring bracket 33 may be manufactured by injection molding and integral molding, which is not only beneficial to ensuring the structural strength of the stirring bracket 33, but also beneficial to simplifying the processing technology of the stirring bracket 33 and reducing the cost.

Referring to fig. 4 and 5, in some embodiments of the present invention, the stirring bracket 33 may include: a support ring 331 and a plurality of legs 332, wherein the support ring 331 may be formed in a circular ring structure or a polygonal ring structure, the plurality of legs 332 are respectively disposed at the outer circumference of the support ring 331, and the auxiliary antenna 32 is connected to the legs 332. This facilitates the stable assembly of the auxiliary antenna 32 on the stirring support 33 by the plurality of legs 332, so that the auxiliary antenna 32 can be rotated synchronously with the stirring support 33, that is, the auxiliary antenna 32 can be driven to rotate synchronously by the rotation of the stirring support 33.

Further, as shown in fig. 4 and 5, the leg 332 is formed with a connection post 3321, the auxiliary antenna 32 is formed with a connection hole 321, and the connection post 3321 is interference-fitted with the connection hole 321. The auxiliary antenna 32 can be assembled on the stirring support 33 through the matching of the connecting column 3321 and the connecting hole 321, and the interference fit between the connecting column 3321 and the connecting hole 321 is favorable for ensuring the reliability of the assembly.

In some embodiments of the present invention, the auxiliary antenna 32 and the stirring bracket 33 may be connected by other connection methods, such as a snap connection or a tight fit, wherein the tight fit may be that the head of the connection post 3321 is made larger than the connection hole 321, and the head of the connection post 3321 is tightly fitted in the connection hole 321.

For example, referring to fig. 4, each of the legs 332 may include a body portion 3322, a first bent portion 3323 and a second bent portion 3324, the first bent portion 3323 is connected to the body portion 3322 and the second bent portion 3324, the body portion 3322 is connected to the support ring 331, a connection post 3321 may be provided on the top of the second bent portion 3324, and the auxiliary antenna 32 may be connected to the mixing support 33 through the connection post 3321.

Specifically, one end of the body portion 3322 may be connected to the support ring 331, and the other end of the body portion 3322 is connected to one end of the first bent portion 3323, the other end of the first bent portion 3323 being connected to one end of the second bent portion 3324, the other end of the second bent portion 3324 being formed as a free end. The body portion 3322 may horizontally extend in a radial direction of the support ring 331, the first bent portion 3323 may extend obliquely upward in an inside-to-outside direction, and the second bent portion 3324 may be disposed parallel to the body portion 3322 and extend in a direction away from the body portion 3322.

Referring to fig. 4, the support ring 331 includes a ring body 3311 and a connecting protrusion 3312, the legs 332 are respectively connected to the ring body 3311, and the connecting protrusion 3312 is disposed on the top of the ring body 3311 and protrudes away from the ring body 3311.

According to the microwave cooking appliance 100 of the embodiment of the invention, the stirring antenna 3 has the advantages of easy installation and low cost, and the stirring antenna 3 assembly has a simple structure and high reliability, and can improve the microwave heating uniformity. When the stirrer antenna 3 is applied to the microwave cooking appliance 100, uniform heating of the microwave cooking appliance 100 can be achieved.

In some embodiments of the invention, stirrer antenna 3 further comprises: the stirring shaft 34, both ends of the stirring shaft 34 are connected with the stirring sheet antenna 31 and the driving device 4 respectively, and the stirring support 33 is connected with the stirring shaft 34. For example, referring to fig. 4 and 5, one end of the agitation shaft 34 is connected to the agitation blade antenna 31 and the other end is connected to the driving device 4. Specifically, the upper end of the stirring shaft 34 is connected with the stirring sheet antenna 31, for example, the stirring shaft can be connected in a clamping or screw connection manner; the lower end of the stirring shaft 34 may be connected to a driving shaft 41 of the driving device 4. The stirring bracket 33 is connected to the stirring shaft 34, and the stirring bracket 33 may be located between the stirring blade antenna 31 and the driving device 4 in a height direction of the microwave cooking appliance 100, for example, in an up-down direction shown in fig. 2, so that the stirring blade antenna 31 may be driven to rotate by the driving device 4, and the auxiliary antenna 32 may be driven to rotate by the stirring bracket 33, and the auxiliary antenna 32 may be formed to be capable of reciprocating in the up-down direction. Thus, during rotation of the stirring shaft 34, the auxiliary antenna 32 can form a surface current by the action of the microwave field, and then the changed current further radiates microwaves into the cooking cavity 11.

This application can increase the bandwidth of stirring antenna 3 by setting up auxiliary antenna 32 around stirring piece antenna 31, and the microwave output efficiency of stirring antenna 3 can be promoted in addition to disturbance about the perpendicular, improves the homogeneity of heating. Compare in single stirring piece antenna 31 among the prior art, this application has increased stirring antenna 3's area, is favorable to improving microwave transmission efficiency, improves the homogeneity of microwave cooking utensil 100 heating. Therefore, the technical problem that in the related art, as only one static stirring antenna 3 rotates in one plane dimension, the field intensity inside the cavity is still unevenly distributed can be solved.

Further, the stirring shaft 34 is connected to the stirring support 33 via the transmission structure 5, so that the auxiliary antenna 32 is rotatable with respect to the stirring shaft 34. For example, referring to fig. 4, the stirring antenna 3 may further include a transmission structure 5, and the stirring shaft 34 is connected to the stirring support 33 through the transmission structure 5, so that when the driving device 4 drives the stirring shaft 34 to rotate, the stirring support 33 may be driven to rotate by the transmission structure 5, so that the auxiliary antenna 32 and the stirring support 33 may rotate synchronously, and thus, power may be further transmitted through the transmission structure 5, which is reasonable in structure and good in reliability.

In some embodiments of the present invention, the stirring shaft 34 and the stirring bracket 33 may be connected by other structures capable of realizing transmission. For example, a key transmission, etc., so that further power transmission can be realized by the key transmission, which is not particularly limited by the present invention.

Further, the transmission structure 5 includes a convex portion 51 and a concave portion 52, wherein the convex portion 51 is formed at one position of the support ring 331 and the stirring shaft 34, and the concave portion 52 matching with the convex portion 51 is formed at the other position. For example, referring to fig. 4, the transmission structure 5 comprises a protrusion 51 and a groove 52 matching with the protrusion 51, it may be that the support ring 331 is formed with the protrusion 51, and the stirring shaft 34 is formed with the groove 52; the stirring shaft 34 may be formed with a projection 51, and the support ring 331 may be formed with a groove 52 or the like. Therefore, through the matching of the convex part 51 and the groove 52, the transmission of power can be realized, so that the stirring shaft 34 can be driven by the driving device 4 to further drive the stirring bracket 33 to rotate, and the auxiliary antenna 32 can be driven to synchronously rotate through the rotation of the stirring bracket 33.

In some embodiments of the present invention, the support ring 331 is provided with a protrusion 51, and the stirring shaft 34 is provided with a groove 52. For example, in some embodiments of the invention, in conjunction with fig. 4 and 9, the protrusions 51 are provided on the support ring 331. Specifically, the connecting boss 3312 of the support ring 331 is provided with a rotation axis hole 3313, the boss 51 is provided on the inner peripheral wall of the rotation axis hole 3313, the boss 51 includes one or more, when the boss 51 includes a plurality of bosses, the plurality of bosses 51 are provided at intervals in the direction around the central axis of the rotation axis hole 3313, the plurality of bosses 51 can be connected by the connecting boss 3312, and the arrangement of the bosses 51 is facilitated, and the grooves 52 are provided in one-to-one correspondence with the bosses 51.

In some embodiments of the present invention, the auxiliary antenna 32 is formed as a metallic coupling loop. For example, the metal coupling ring is a circular ring, an elliptical ring or a polygonal ring; the metallic coupling ring may be formed as a closed ring or an open ring, etc. The specific arrangement of the metallic coupling loop is preferably such that some current can be induced to the paddle antenna 31.

The driving device 4 is a motor, the stirring sheet antenna 31 is in transmission connection with a motor shaft of the motor through a stirring shaft 34, a stirring support 33 is arranged in the shell 1, a rotating shaft hole 3313 is arranged on the stirring support 33, and the stirring shaft 34 is rotatably matched in the rotating shaft hole 3313. Referring to fig. 1 and 2, the inner bottom wall of the case 1 is provided with a fixing bracket 12, and the agitating bracket 33 is rotatably coupled to the fixing bracket 12. Here, the fixing bracket 12 is fixed with respect to the housing 1, and the stirring bracket 33 is rotatable with respect to the fixing bracket 12. The fixing bracket 12 may be provided with a fitting hole 121, the stirring shaft 34 penetrates the fitting hole 121, and referring to fig. 5, the bottom of the stirring shaft 34 is provided with an assembly hole (not shown in the figure), and a motor shaft penetrates the assembly hole so as to connect the motor shaft to the stirring shaft 34. In some embodiments of the present invention, the motor shaft may have a square shaft structure, the cross section of the motor shaft has a square shape, the assembling hole may be a square hole formed at the bottom of the stirring shaft 34, and the stirring shaft 34 is in transmission connection with the motor shaft.

In some embodiments of the present invention, the stirring support 33 is rotatably connected to the fixing support 12 by the meshing tooth structure 8 to reciprocate the auxiliary antenna 32 up and down. For example, referring to fig. 6 to 8, the stirring support 33 and the fixing support 12 may be rotatably connected by the engaging tooth structure 8, so that the stirring support 33 reciprocates up and down together with the auxiliary antenna 32.

Further, the engaging tooth structure 8 comprises a convex tooth 81 and a concave tooth 82, the stirring support 33 and the fixing support 12 are both provided with the convex tooth 81 and the concave tooth 82, the convex tooth 81 on the stirring support 33 is engaged with the concave tooth 82 on the fixing support 12, and the concave tooth 82 on the stirring support 33 is engaged with the convex tooth 81 on the fixing support 12.

For example, referring to fig. 1 and 3 in combination with fig. 8, the meshing tooth structure 8 may include convex teeth 81 and concave teeth 82, the stirring bracket 33 is provided with the convex teeth 81 and concave teeth 82, and the convex teeth 81 and concave teeth 82 are alternately arranged in a direction around the central axis of the stirring bracket 33; the fixed bracket 12 is provided with convex teeth 81 and concave teeth 82, the convex teeth 81 and concave teeth 82 being alternately arranged in a direction around the central axis of the fixed bracket 12; the central axis of the stirring support 33 is collinear with the central axis of the fixed support 12. Wherein, the convex teeth 81 on the stirring bracket 33 are meshed with the concave teeth 82 on the fixed bracket 12, and the concave teeth 82 on the stirring bracket 33 are meshed with the convex teeth 81 on the fixed bracket 12. Therefore, in the process that the stirring bracket 33 rotates relative to the fixed bracket 12, the stirring bracket 33 and the auxiliary antenna 32 can reciprocate up and down together through the mutual meshing of the convex teeth 81 and the concave teeth 82, so that the microwave transmission efficiency is improved, and the heating uniformity is improved.

In some embodiments of the present invention, the tooth thickness of the convex tooth 81 in the up-down direction is T, the distance of the reciprocating movement of the auxiliary antenna 32 in the up-down direction is L, and L ═ 2T is satisfied. For example, in connection with fig. 8, the tooth thickness T of a tooth 81 may be referenced to the distance between the highest point of an adjacent tooth 81 and the lowest point of a tooth 82 on the fixed bracket 12. In the embodiment of the present invention shown in fig. 6, the male teeth 81 and the female teeth 82 are engaged with each other, that is, the male teeth 81 on the stirring rack 33 are engaged with the female teeth 82 on the fixed rack 12, and the female teeth 82 on the stirring rack 33 are engaged with the male teeth 81 on the fixed rack 12, and at this time, the stirring rack 33 is at the lowest position with respect to the fixed rack 12. In the process from fig. 6 to 7, the male teeth 81 and the female teeth 82 are engaged with each other, and the stirring holder 33 ascends with respect to the fixed holder 12, and in fig. 7, the stirring holder 33 is at a middle position with respect to the fixed holder 12. In the embodiment of the present invention shown in fig. 8, the teeth 81 and 82 are offset from each other, i.e., the teeth 81 on the stirring holder 33 are opposite to the teeth 81 on the fixing holder 12, and the teeth 82 on the stirring holder 33 are opposite to the teeth 82 on the fixing holder 12, and at this time, the stirring holder 33 is at the highest position with respect to the fixing holder 12.

Fig. 6 to 8 show the ascending movement of the stirring frame 33, and the descending movement is opposite to the ascending movement, and will not be described again. In the course of movement from fig. 6 to 8, the distance L by which the auxiliary antenna 32 reciprocates in the up-down direction is equal to twice the tooth thickness T of the convex teeth 81.

For example, when T is 5mm, L is 10mm, and at this time, the distance that the auxiliary antenna 32 can reciprocate up and down is within 10 mm; for example, when T is 10mm, L is 20mm, and the distance that the auxiliary antenna 32 can reciprocate up and down is within 20 mm. The distance that the auxiliary antenna 32 can reciprocate up and down can be specifically set according to the installation space, for example, when the model is designed towards the miniaturization direction so that the installation space is limited, the tooth thickness can be reduced to reduce the reciprocating distance of the auxiliary antenna 32; and the thickness of the teeth may be appropriately increased to increase the reciprocating distance of the auxiliary antenna 32 when the installation space permits, as will be understood by those skilled in the art.

The present application is described by taking three convex teeth 81 and three concave teeth 82 on the stirring bracket 33, and three convex teeth 81 and three concave teeth 82 on the stirring bracket 33 as an example, however, this should not be construed as limiting the present invention.

Here, it can be understood that the smaller the number of the convex teeth 81, the longer the stroke of the reciprocating motion of the auxiliary antenna 32, the longer the up-down reciprocating time, and the slower the frequency of the up-down reciprocating motion. The greater the number of the convex teeth 81, the shorter the stroke of the reciprocating motion of the auxiliary antenna 32, the shorter the time of the up-down reciprocating motion, and the faster the frequency of the up-down reciprocating motion, and the specific number of the convex teeth 81 and the concave teeth 82 can be adaptively set according to actual needs.

With reference to fig. 4, the stirring plate antenna 31 is further provided with an arc-shaped groove 311, the arc-shaped groove 311 can penetrate through the stirring plate antenna 31 along the thickness direction, the arc-shaped groove 311 includes a plurality of grooves, the plurality of arc-shaped grooves 311 are arranged in the circumferential direction of the stirring antenna 3 plane at intervals, the current distribution on the surface of the stirring antenna 3 can be blocked through the arc-shaped groove 311, and the heating uniformity is improved.

Referring to fig. 9, the microwave cooking appliance 100 may further include a control panel 7, and the control panel 7 facilitates a user to operate and control the microwave cooking appliance 100, and has a high degree of intelligence and convenience in use.

The process of reciprocating the auxiliary antenna 32 in the microwave cooking appliance 100 according to the embodiment of the present invention will be described with reference to the accompanying drawings.

Referring to fig. 6 to 8, fig. 6 is a schematic view of the stirrer antenna 3 of the microwave cooking appliance 100 according to the embodiment of the present invention at a position where the stirrer support 33 together with the auxiliary antenna 32 is at the lowest position. Fig. 7 is a schematic view of the stirrer antenna 3 of the microwave cooking appliance 100 according to the embodiment of the present invention in another position; at this time, as the stirring shaft 34 is driven by the motor to rotate, the stirring bracket 33 and the auxiliary antenna 32 can be driven to rotate, and simultaneously, the auxiliary antenna 32 can be moved upwards by the meshing tooth structure 8, and the auxiliary antenna 32 is moved upwards in a direction close to the stirring blade antenna 31, and fig. 7 shows that the auxiliary antenna 32 is located below the stirring blade antenna 31 and is relatively close to the stirring blade antenna 31. Fig. 8 is a schematic diagram of the stirring antenna 3 of the microwave cooking appliance 100 in another position, in which the stirring bracket 33 and the auxiliary antenna 32 are driven to rotate as the motor drives the stirring shaft 34 to rotate, and the auxiliary antenna 32 is continuously moved upwards by the meshing tooth structure 8, in which fig. 8 shows that the auxiliary antenna 32 is located above the stirring blade antenna 31, and the stirring bracket 33 and the auxiliary antenna 32 are located at the highest position.

In the embodiment of the present invention shown in fig. 6, the convex teeth 81 and the concave teeth 82 are engaged with each other, that is, the convex teeth 81 on the stirring rack 33 are engaged with the concave teeth 82 on the fixed rack 12, and the concave teeth 82 on the stirring rack 33 are engaged with the convex teeth 81 on the fixed rack 12, and at this time, the stirring rack 33 is at the lowest position with respect to the fixed rack 12. In the process from fig. 6 to 7, the male teeth 81 and the female teeth 82 are engaged with each other, and the stirring holder 33 ascends with respect to the fixed holder 12, and in fig. 7, the stirring holder 33 is at a middle position with respect to the fixed holder 12. In the embodiment of the present invention shown in fig. 8, the teeth 81 and 82 are offset from each other, i.e., the teeth 81 on the stirring holder 33 are opposite to the teeth 81 on the fixing holder 12, and the teeth 82 on the stirring holder 33 are opposite to the teeth 82 on the fixing holder 12, and at this time, the stirring holder 33 is at the highest position with respect to the fixing holder 12.

Fig. 6 to 8 show the ascending movement of the stirring frame 33, and the descending movement is opposite to the ascending movement, and will not be described again. In the course of movement from fig. 6 to 8, the auxiliary antenna 32 reciprocates in the up-down direction by a distance L equal to twice the tooth thickness T of the convex teeth 81.

Specific embodiments of a microwave cooking appliance 100 according to the present invention will be described below with reference to the accompanying drawings.

According to the microwave cooking appliance 100 of the embodiment of the invention, an auxiliary antenna 32 (such as a metal coupling ring and the like) is added on the basis of the original stirring antenna 3, the metal coupling ring can reciprocate up and down, and the novel dynamic stirring antenna 3 is arranged on the microwave cooking appliance 100, so that the microwave heating uniformity is improved. According to the microwave cooking appliance 100 of the embodiment of the invention, uneven pain points in the heating process are solved on the basis of the existing stirring antenna 3.

Wherein, in the rotation process, the metal coupling ring can float by 10mm from top to bottom, thereby realizing the purpose of uniform microwave heating. The stirrer antenna 3 mainly includes: a stirring shaft 34 (such as a metal shaft), a stirring sheet antenna 31, a metal coupling ring and a plastic support frame, wherein the metal coupling ring is assembled on the plastic support frame. During rotation of the stirring shaft 34, the metallic coupling ring can form a surface current by the action of the microwave field, and then the changed current further radiates microwaves into the cooking cavity 11. And the whole process is always floated by 10mm up and down, thereby improving the uniformity of heating. This application is through assembling metallic coupling ring on plastic support frame to set up a motor alone in plastic support frame lower part, be used for controlling plastic support frame reciprocating motion from top to bottom, thereby reach the unsteady effect of 10mm about the metallic coupling ring.

The operation of the microwave cooking appliance 100 according to the present invention will be described with reference to the accompanying drawings.

Specifically, the motor drive drives the stirring antenna 3 to rotate, and the plastic support frame is sleeved at the position of the stirring shaft 34 at the lower end of the stirring antenna 3 and drives the plastic support frame to rotate when the stirring antenna 3 rotates. In order to enable the metal coupling ring on the plastic support frame to realize the up-and-down floating movement, the stirring support frame 33 is rotatably connected with the fixed support frame 12 through the meshing tooth structure 8, the meshing tooth structure 8 comprises a convex tooth 81 and a concave tooth 82, the stirring support frame 33 and the fixed support frame 12 are both provided with the convex tooth 81 and the concave tooth 82, the convex tooth 81 on the stirring support frame 33 is meshed with the concave tooth 82 on the fixed support frame 12, and the concave tooth 82 on the stirring support frame 33 is meshed with the convex tooth 81 on the fixed support frame 12. . Three grooves 52 are designed on the stirring shaft 34 of the stirring antenna 3, and three convex parts 51 matched with the grooves are designed on the plastic support frame. When the plastic support frame rotates, the plastic support frame can reciprocate up and down, so that the metal coupling ring assembled on the plastic support frame is driven to reciprocate up and down, and the height (such as tooth thickness T) of the convex teeth 81 of the meshing tooth structure 8 is designed, so that the floating effect of 10mm up and down is achieved.

Referring to fig. 10, the stirring antenna assembly 200 of the microwave cooking appliance 100 according to the embodiment of the second aspect of the present invention includes: stirring antenna 3, stirring support 33 and stirring shaft 34.

Specifically, the stirrer antenna 3 is rotatably provided in the cooking cavity 11 of the microwave cooking appliance 100, the stirrer antenna 3 includes a stirrer plate antenna 31 and an auxiliary antenna 32, a projection of the stirrer plate antenna 31 on a reference surface does not exceed a projection of the auxiliary antenna 32 on the reference surface, the reference surface is a horizontal plane parallel to the stirrer plate antenna 31, and the auxiliary antenna 32 is configured to be reciprocally movable in an up-down direction. The auxiliary antenna 32 is connected to the agitation support 33. The two ends of the stirring shaft 34 are respectively connected with the stirring sheet antenna 31 and the driving device 4, and the stirring support 33 is connected with the stirring shaft 34.

The stirring antenna assembly 200 of the microwave cooking appliance 100 according to the second aspect of the present invention includes the stirring sheet antenna 31 and the auxiliary antenna 32, and the outer contour of the auxiliary antenna 32 is not smaller than the outer contour of the stirring sheet antenna 31, and the auxiliary antenna 32 is formed to be reciprocatable in the up-down direction; the auxiliary antenna 32 is able to form a surface current by the action of the microwave field during the rotation of the stirring antenna 3, and then the changed current further radiates microwaves into the cooking cavity 11. In addition, according to the present invention, the auxiliary antenna 32 is provided around the stirring blade antenna 31, so that the bandwidth of the stirring antenna 3 can be increased, and the stirring blade antenna can be disturbed vertically, thereby improving the microwave output efficiency of the stirring antenna 3 and improving the uniformity of heating. Compare in single stirring piece antenna 31 among the prior art, this application has increased stirring antenna 3's area, is favorable to improving microwave transmission efficiency, improves the homogeneity of microwave cooking utensil 100 heating. Therefore, the technical problem that in the related art, as only one static stirring antenna 3 rotates in one plane dimension, the field intensity inside the cavity is still unevenly distributed can be solved.

The stirring antenna assembly 200 of the microwave cooking appliance 100 according to the second aspect of the present invention has the advantages of easy installation and low cost, and the stirring antenna 3 assembly has a simple structure and high reliability, and can improve the microwave heating uniformity. When the stirring antenna assembly 200 is applied to the microwave cooking appliance 100, uniform heating on the microwave cooking appliance 100 can be achieved.

Other structural examples and operations of the microwave cooking appliance 100 and the stirring antenna assembly 200 of the microwave cooking appliance 100 according to the embodiments of the present invention are known to those of ordinary skill in the art and will not be described in detail herein.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.

In the description of the present invention, "the first feature" and "the second feature" may include one or more of the features. In the description of the present invention, "a plurality" means two or more. In the description of the present invention, the first feature being "on" or "under" the second feature may include the first and second features being in direct contact, and may also include the first and second features being in contact with each other not directly but through another feature therebetween. In the description of the invention, "above", "over" and "above" a first feature in a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean 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 invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. 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 invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.