CN117423976A - Antenna assembly and cooking utensil - Google Patents

Abstract

The invention provides an antenna assembly and a cooking appliance, wherein the antenna assembly is used for the cooking appliance, the cooking appliance comprises a cooking cavity, and the antenna assembly comprises: a rotating shaft; the stirring antennas are connected to the rotating shaft and are sequentially arranged along the extending direction of the rotating shaft, and a space is reserved between any two adjacent stirring antennas.

Description

Antenna assembly and cooking utensil

Technical Field

The invention relates to the technical field of household electrical appliances, in particular to an antenna assembly and a cooking appliance.

Background

In the prior art, a wafer-shaped antenna is generally adopted to radiate microwaves into a cooking cavity, but because the wafer-shaped antenna is of a two-dimensional plane structure, the microwaves are emitted from the same plane and spread in the cooking cavity, so that uneven microwave field intensity in the cooking cavity is easily caused, and further, food materials cannot be heated uniformly by microwaves.

Disclosure of Invention

The present invention aims to solve at least one of the technical problems existing in the prior art or related art.

To this end, a first object of the present invention is to propose an antenna assembly.

A second object of the present invention is to propose a cooking appliance.

To achieve at least one of the above objects, according to a first aspect of the present invention, there is provided an antenna assembly for a cooking appliance including a cooking cavity, the antenna assembly comprising: a rotating shaft; the stirring antennas are connected to the rotating shaft and are sequentially arranged along the extending direction of the rotating shaft, and a space is reserved between any two adjacent stirring antennas.

The antenna assembly that this application provided for among the cooking utensil, cooking utensil includes the culinary art chamber, and the culinary art chamber is used for holding edible material, and cooking utensil can cook the edible material in the culinary art chamber. The cooking utensil has the microwave heating mode, and the antenna assembly can radiate the microwave to the cooking intracavity to realize the microwave heating function of cooking utensil. The antenna assembly is specifically defined below.

The antenna assembly that this application provided includes pivot and a plurality of stirring antenna, and wherein, stirring antenna connects in the pivot to install fixedly to the stirring antenna, stirring antenna is used for to the microwave of cooking intracavity radiation. Specifically, a plurality of stirring antennas are connected in the pivot and set gradually along the extending direction of pivot, have the interval between two arbitrary adjacent stirring antennas, and the pivot extends along the direction of height in culinary art chamber, and a plurality of stirring antennas's height is different each other promptly, and each stirring antenna is from high to low setting gradually. Understandably, if the heights of the stirring antennas are the same, the stirring antennas are located on the same plane, which may lead to uneven distribution of microwave field intensity in the cooking cavity, and finally, the food cannot be heated uniformly. In order to avoid the problem, the application sets up a plurality of stirring antennas in antenna module to set gradually a plurality of stirring antennas along the extending direction of pivot, because the pivot extends along the direction of height in culinary art chamber, thereby make the high difference each other that a plurality of stirring antennas place. Therefore, microwaves can be radiated into the cooking cavity through the stirring antennas with different heights, so that the microwave field intensity in the cooking cavity tends to be balanced, food in the cooking cavity is heated by uniform microwaves, and the cooking effect of the cooking appliance is improved.

Through setting up a plurality of stirring antennas into along the extending direction of pivot and set gradually to can set up each stirring antenna on different heights, in order to make the microwave field intensity in the culinary art chamber tend to equilibrium, and then ensure that the food in the culinary art chamber receives even microwave heating, promoted cooking utensil's culinary art effect.

The antenna assembly according to the invention may further have the following distinguishing technical features:

in some embodiments, optionally, the plurality of stirring antennas includes: a first stirring antenna; the second stirring antenna, the height of second stirring antenna is less than first stirring antenna, along the direction of perpendicular to and towards first stirring antenna's upper surface, first stirring antenna dodges each other with second stirring antenna.

In this embodiment, the stirring antenna is further defined. The plurality of stirring antennas comprise a first stirring antenna and a second stirring antenna, wherein the height of the second stirring antenna is lower than that of the first stirring antenna, namely the second stirring antenna is connected to the position, below the first stirring antenna, on the rotating shaft. Therefore, microwaves can be radiated into the cooking cavity through the first stirring antenna and the second stirring antenna which are different in height at the same time, so that the microwave field intensity at each position in the cooking cavity tends to be balanced.

Further, along the direction perpendicular to and towards the upper surface of the first stirring antenna, the first stirring antenna and the second stirring antenna mutually avoid. Specifically, the first stirring antenna and the second stirring antenna are both provided with a gap, the second stirring antenna is located below the first stirring antenna, and when the first stirring antenna and the second stirring antenna radiate microwaves, the microwaves radiated by the second stirring antenna can pass through the gap of the first stirring antenna and propagate in the cooking cavity because the first stirring antenna does not shield the second stirring antenna. Therefore, shielding of the first stirring antenna to microwaves radiated by the second stirring antenna can be avoided, mutual influence of the first stirring antenna and the second stirring antenna is avoided, and microwave radiation effect of the antenna assembly is improved.

In some embodiments, the first and second whip antennas are optionally helical in shape.

In this embodiment, the shapes of the first and second stirring antennas are defined. Specifically, the first and second whip antennas are in a spiral shape. Compared with the traditional disk-shaped antenna, the first stirring antenna and the second stirring antenna are designed into the spiral line, and the spiral line has wider gaps, so that three-dimensional propagation of microwaves can be realized, and the uniformity of microwave field intensity in the cooking cavity is improved. And be favorable to making first stirring antenna and second stirring antenna dodge each other, avoid first stirring antenna to the microwave that the second stirring antenna radiated to cause shielding.

In some embodiments, the first and second whip antennas are optionally shaped as archimedes' spirals.

In this embodiment, the shapes of the first and second whip antennas are further defined. Specifically, the first and second stirring antennas are in the shape of archimedes' spiral. The first and second whip antennas, which are designed as archimedes' helical lines, have better microwave radiation effects than other helical structures. The microwave radiated by the conventional disk-shaped antenna is a linearly polarized wave and can propagate only in a plane. The first stirring antenna and the second stirring antenna are designed into Archimedes spiral lines, and microwaves radiated by the first stirring antenna and the second stirring antenna are circularly polarized waves, so that the microwaves can be propagated in a three-dimensional space, and the uniformity of microwave field intensity in a cooking cavity is improved.

In some embodiments, optionally, the first whip antenna is counter-rotating to the second whip antenna.

In this technical scheme, the rotation directions of the first stirring antenna and the second stirring antenna are limited. Specifically, the first stirring antenna and the second stirring antenna are opposite in rotation direction. Through setting the rotation direction of first stirring antenna and second stirring antenna to opposite, can avoid first stirring antenna to shelter from the second stirring antenna, make first stirring antenna and second stirring antenna dodge each other, make the microwave that the second stirring antenna radiated propagate through first stirring antenna's gap, promote antenna assembly's microwave radiation effect.

In some embodiments, optionally, the shaft is connected to a start point of a spiral line of the first and second stirring antennas.

In this technical scheme, the connection relation between the rotating shaft and the first and second stirring antennas is defined. Specifically, the rotating shaft is connected to the starting points of the spiral lines of the first stirring antenna and the second stirring antenna, namely, the first stirring antenna and the second stirring antenna are both spirally extended along the direction deviating from the rotating shaft by taking the connecting point of the first stirring antenna and the second stirring antenna as the starting point, and the rotating shaft is connected to the positions, close to the centers, on the first stirring antenna and the second stirring antenna. Therefore, the first stirring antenna and the second stirring antenna can be driven by the rotating shaft to rotate around the axis close to the center, so that the microwave radiation effect of the antenna assembly is further improved, and the uniformity of the microwave field intensity in the cooking cavity is improved.

In some aspects, optionally, the antenna assembly further comprises: and the driving part is connected with the rotating shaft and is used for driving the rotating shaft to drive the stirring antenna to rotate.

In this technical solution, the structure of the antenna assembly is further defined. In order to enable the rotating shaft to drive the first stirring antenna and the second stirring antenna to rotate, a driving part is further arranged in the antenna assembly. Specifically, drive division links to each other with the pivot, and drive division can drive the pivot and rotate, and then drive stirring antenna through the pivot and rotate, makes first stirring antenna and second stirring antenna can rotate around the axis that is close to the center. Therefore, the microwave radiation effect of the antenna assembly is further improved, and the uniformity of the microwave field intensity in the cooking cavity is improved.

In some embodiments, optionally, the driving part includes: the driving shaft is connected with the rotating shaft; and the driving motor is connected with the driving shaft and drives the rotating shaft to rotate through the driving shaft.

In this embodiment, the structure of the driving unit is limited. The drive part comprises a drive shaft and a drive motor, wherein the drive shaft is connected with the rotating shaft, the drive motor is connected with the drive shaft, the drive motor drives the drive shaft to rotate, and then the drive shaft drives the rotating shaft to rotate, so that the rotation of the first stirring antenna and the second stirring antenna is realized. The driving motor and the driving shaft are both positioned outside the cooking cavity so as to avoid the influence of high temperature in the cooking cavity on the driving part, shorten the service life of the driving motor and extend the rotating shaft to the outside of the cooking cavity to be connected with the driving shaft.

In some embodiments, optionally, the maximum cross-sectional dimension of the whipping antenna is greater than or equal to 60mm and less than the width of the cooking cavity.

In this embodiment, the size of the stirring antenna is limited. Specifically, the maximum cross-sectional dimension of the whipping antenna is greater than or equal to 60mm and less than the width dimension of the cooking cavity. Thus, the stirring antenna can be ensured to have a sufficient radiation area, and the problem of poor microwave radiation effect caused by undersize of the stirring antenna is avoided. And, through setting up the maximum cross-sectional dimension of stirring antenna to be less than the width of cooking cavity, can avoid taking place to interfere between stirring antenna and the wall of cooking cavity, ensure antenna assembly's normal installation.

In some embodiments, optionally, a distance between any two adjacent stirring antennas along an extension direction of the rotating shaft is greater than or equal to 5mm and less than or equal to 15mm.

In this technical scheme, the positional relationship between the two stirring antennas is further defined. Specifically, the distance between any two adjacent stirring antennas is greater than or equal to 5mm and less than or equal to 15mm along the extending direction of the rotating shaft, and the rotating shaft extends along the height direction of the cooking cavity, i.e., the distance between any two adjacent stirring antennas in the height direction of the cooking cavity is greater than or equal to 5mm and less than or equal to 15mm. Understandably, if the distance between two adjacent stirring antennas is too small, the mutual interference of the microwaves radiated between the two adjacent stirring antennas may be caused, which affects the microwave radiation effect, and if the distance between the two adjacent stirring antennas is too large, the installation space occupied by the antenna assembly may be large. In order to avoid the problem, the application limits the distance between two adjacent stirring antennas to be in the range of 5mm to 15mm, so that the microwave radiation effect of the antenna assembly can be ensured, and the antenna assembly can be prevented from occupying too large installation space.

The second aspect of the invention also provides a cooking appliance, comprising the antenna assembly provided by the first aspect of the invention; the box body comprises a cooking cavity, the stirring antenna stretches into the cooking cavity, and the stirring antenna is used for radiating microwaves into the cooking cavity.

The application provides a cooking utensil, including antenna module and box, the box includes the culinary art chamber, and the culinary art chamber is used for holding edible material, and cooking utensil has microwave heating function, and antenna module stretches into the culinary art intracavity, can radiate microwave to the culinary art intracavity through antenna module to antenna module can also make the microwave field intensity of culinary art intracavity everywhere tend to even, in order to carry out even microwave heating to the edible material of culinary art intracavity, promotes the culinary art effect.

The cooking appliance provided by the second aspect of the invention has all the beneficial effects of the antenna assembly because the cooking appliance comprises the antenna assembly provided by the first aspect of the invention.

In some embodiments, optionally, the cooking appliance further comprises: a microwave generator for generating microwaves; the waveguide tube is arranged on the bottom wall of the box body, is connected with the microwave generator and is used for transmitting microwaves generated by the microwave generator to the antenna assembly.

In this technical scheme, the structure of the cooking appliance is further defined. The cooking utensil still includes microwave generator and wave guide, and wherein, microwave generator is used for generating the microwave, and the wave guide is used for transmitting microwave, and the wave guide is located the diapire of box and is linked to each other with microwave generator, and the wave guide has the opening, and the opening sets up towards antenna assembly, and the microwave that microwave generator generated passes to antenna assembly through the wave guide, and antenna assembly will microwave to cooking intracavity radiating. So as to realize the effect of microwave heating of food materials in the cooking cavity.

In some embodiments, optionally, the case includes: the cavity bottom plate forms the bottom wall of the cooking cavity; at least one feed port is arranged on the cavity bottom plate, and the waveguide tube transmits microwaves to the antenna component through the feed port.

In this technical scheme, the structure of the case is defined. The box body comprises a cavity bottom plate, the cavity bottom plate forms the bottom wall of the cooking cavity, the cavity bottom plate is provided with at least one feed port, the feed port is used for transmitting microwaves, and the waveguide tube transmits the microwaves to the antenna assembly through the feed port so as to realize the propagation of the microwaves.

In some embodiments, optionally, the cavity floor has a mounting slot, and the antenna assembly is located in the mounting slot.

In this technical scheme, the structure of the case is further defined. The cavity bottom plate is also provided with a mounting groove, and the bottom wall of the mounting groove is provided with a through hole, and the antenna component extends into the cooking cavity from the through hole. The antenna assembly is located in the mounting groove, so that the antenna assembly can be prevented from occupying other spaces in the cooking cavity, the space of the cooking cavity for containing food is increased, and the cooking appliance can cook food with larger volume.

In some embodiments, optionally, the cooking appliance comprises a microwave oven or a micro-baking all-in-one machine.

In this technical scheme, cooking utensil includes microwave oven or micro-roast all-in-one.

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

Drawings

The foregoing and/or additional aspects and advantages of the invention will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

fig. 1 illustrates a schematic structural view of a cooking appliance according to an embodiment of the present invention;

FIG. 2 shows a schematic diagram of the structure of a cavity floor and antenna assembly of one embodiment of the invention;

FIG. 3 shows an exploded view of a cavity floor and antenna assembly of one embodiment of the present invention;

fig. 4 shows one of the structural schematic diagrams of the antenna assembly of one embodiment of the invention;

FIG. 5 shows a second schematic diagram of the antenna assembly according to an embodiment of the invention;

fig. 6 shows a third schematic structural view of an antenna assembly according to an embodiment of the present invention;

FIG. 7 shows an antenna assembly surface electric field profile for one embodiment of the present invention;

FIG. 8 shows a right-handed circularly polarized wave excited by a stirring antenna having a right-handed direction among a plurality of stirring antennas according to the present invention;

FIG. 9 shows a left-hand circularly polarized wave excited by a left-hand whip antenna of the plurality of whip antennas of the present invention;

fig. 10 shows a schematic diagram of the frequency curve of the operating center of the antenna assembly of the present invention.

The correspondence between the reference numerals and the component names in fig. 1 to 6 is:

100 antenna components, 110 rotating shafts, 120 stirring antennas, 121 first stirring antennas, 122 second stirring antennas, 130 driving parts, 131 driving shafts, 132 driving motors, 200 cooking appliances, 210 boxes, 211 cooking cavities, 212 cavity bottom plates, 213 mounting grooves, 220 microwave generators and 230 waveguides.

Detailed Description

In order that the above-recited objects, features and advantages of the present invention will be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings and appended detailed description. It should be noted that, in the case of no conflict, the embodiments of the present application and the features in the embodiments may be combined with each other.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those described herein, and therefore the scope of the present invention is not limited to the specific embodiments disclosed below.

An antenna assembly 100 and a cooking appliance 200 provided according to some embodiments of the present invention are described below with reference to fig. 1 to 10.

In one embodiment according to the present application, as shown in fig. 1, 2, 3 and 6, the present invention proposes an antenna assembly 100, the antenna assembly 100 being used for a cooking appliance 200, the cooking appliance 200 comprising a cooking cavity 211, the antenna assembly 100 comprising: a rotation shaft 110; the plurality of stirring antennas 120 are configured to radiate microwaves into the cooking cavity 211, and the plurality of stirring antennas 120 are connected to the rotating shaft 110 and sequentially arranged along an extending direction of the rotating shaft 110, and a space is provided between any two adjacent stirring antennas 120.

The antenna assembly 100 is used in a cooking appliance 200, the cooking appliance 200 comprises a cooking cavity 211, the cooking cavity 211 is used for containing food materials, and the cooking appliance 200 can cook the food materials in the cooking cavity 211. The cooking appliance 200 has a microwave heating mode, and the antenna assembly 100 is capable of radiating microwaves into the cooking cavity 211 to implement a microwave heating function of the cooking appliance 200. The antenna assembly 100 is specifically defined below.

The antenna assembly 100 provided by the application comprises a rotating shaft 110 and a plurality of stirring antennas 120, wherein the stirring antennas 120 are connected to the rotating shaft 110 to mount and fix the stirring antennas 120, and the stirring antennas 120 are used for radiating microwaves into the cooking cavity 211. Specifically, the plurality of stirring antennas 120 are connected to the rotating shaft 110 and sequentially arranged along the extending direction of the rotating shaft 110, a space is provided between any two adjacent stirring antennas 120, the rotating shaft 110 extends along the height direction of the cooking cavity 211, that is, the heights of the plurality of stirring antennas 120 are different from each other, and each stirring antenna 120 is sequentially arranged from high to low. It will be appreciated that if the heights of the respective whip antennas 120 are the same, the respective whip antennas 120 lie on the same plane, which may lead to uneven distribution of microwave field intensity within the cooking cavity 211, and eventually, to uneven heating of the food material. In order to avoid the above problem, the present application will set a plurality of stirring antennas 120 in the antenna assembly 100, and set the plurality of stirring antennas 120 in sequence along the extending direction of the rotating shaft 110, and since the rotating shaft 110 extends along the height direction of the cooking cavity 211, the heights of the plurality of stirring antennas 120 are different from each other. In this way, microwaves can be radiated into the cooking cavity 211 through the stirring antennas 120 with different heights, so that the microwave field intensity in the cooking cavity 211 tends to be balanced, food materials in the cooking cavity 211 are heated by uniform microwaves, and the cooking effect of the cooking appliance 200 is improved.

Through setting up a plurality of stirring antennas 120 into along the extending direction of pivot 110 and set gradually to can set up each stirring antenna 120 on different heights, so that the microwave field intensity in the culinary art chamber 211 tends to be balanced, and then ensure that the food in the culinary art chamber 211 receives even microwave heating, promoted the culinary art effect of cooking utensil 200.

In some embodiments, optionally, as shown in fig. 1, 2, 3, and 6, the plurality of whip antennas 120 comprises: a first agitation antenna 121; the second stirring antenna 122, the height of the second stirring antenna 122 is lower than that of the first stirring antenna 121, and the first stirring antenna 121 and the second stirring antenna 122 are mutually avoided along the direction perpendicular to and towards the upper surface of the first stirring antenna 121.

In this embodiment, the whip antenna 120 is further defined. The plurality of stirring antennas 120 include a first stirring antenna 121 and a second stirring antenna 122, wherein the second stirring antenna 122 is lower than the first stirring antenna 121 in height, i.e., the second stirring antenna 122 is connected to the rotating shaft 110 at a position below the first stirring antenna 121. In this way, microwaves can be simultaneously radiated into the cooking cavity 211 through the first and second whipping antennas 121 and 122 having different heights, so that the microwave field strengths at various positions in the cooking cavity 211 tend to be balanced.

Further, the first whip antenna 121 and the second whip antenna 122 are mutually dodged in a direction perpendicular to and facing the upper surface of the first whip antenna 121. Specifically, the first and second stirring antennas 121 and 122 each have a slit, and the second stirring antenna 122 is located under the first stirring antenna 121, and when the first and second stirring antennas 121 and 122 radiate microwaves, since the first stirring antenna 121 does not shield the second stirring antenna 122, microwaves radiated from the second stirring antenna 122 can pass through the slit of the first stirring antenna 121 and propagate inside the cooking cavity 211. In this way, the shielding of the first stirring antenna 121 to the microwave radiated by the second stirring antenna 122 can be avoided, the mutual influence of the first stirring antenna 121 and the second stirring antenna 122 is avoided, and the microwave radiation effect of the antenna assembly 100 is improved.

In some embodiments, the first and second whip antennas 121 and 122 are optionally helical in shape.

In this embodiment, the shapes of the first and second whip antennas 121 and 122 are defined. Specifically, the first and second whip antennas 121 and 122 have a spiral shape. Compared with the conventional disk-shaped antenna, the first stirring antenna 121 and the second stirring antenna 122 are designed into the spiral line shape, and the spiral line has a wider gap, so that three-dimensional propagation of microwaves can be realized, and uniformity of microwave field intensity in the cooking cavity 211 is improved. And be favorable to making first stirring antenna 121 and second stirring antenna 122 dodge each other, avoid first stirring antenna 121 to the microwave that second stirring antenna 122 radiated to cause shielding.

In some embodiments, optionally, as shown in fig. 1, 2, 3, and 6, the first and second whip antennas 121 and 122 are shaped in archimedes' spiral lines.

In this embodiment, the shapes of the first and second whip antennas 121 and 122 are further defined. Specifically, the first and second whip antennas 121 and 122 have an archimedean spiral shape. The first and second whip antennas 121 and 122, which are designed as archimedes' helical lines, have better microwave radiation effects than other helical structures. The microwave radiated by the conventional disk-shaped antenna is a linearly polarized wave and can propagate only in a plane. The first stirring antenna 121 and the second stirring antenna 122 are designed into archimedes spiral lines, and the microwaves radiated by the first stirring antenna 121 and the second stirring antenna 122 are circularly polarized waves, so that the microwaves can be propagated in a three-dimensional space, and the uniformity of the microwave field intensity in the cooking cavity 211 is improved.

In some embodiments, optionally, the first whip antenna 121 is counter-rotating to the second whip antenna 122.

In this embodiment, the directions of rotation of the first and second whip antennas 121 and 122 are defined. Specifically, the first whip antenna 121 and the second whip antenna 122 are in opposite rotation directions. Through setting the rotation directions of the first stirring antenna 121 and the second stirring antenna 122 to be opposite, the first stirring antenna 121 can be prevented from shielding the second stirring antenna 122, so that the first stirring antenna 121 and the second stirring antenna 122 can avoid each other, microwaves radiated by the second stirring antenna 122 can propagate through a gap of the first stirring antenna 121, and the microwave radiation effect of the antenna assembly 100 is improved.

In some embodiments, optionally, as shown in fig. 4, the rotating shaft 110 is connected to the start points of the spiral lines of the first and second whip antennas 121 and 122.

In this embodiment, the connection relationship of the rotation shaft 110 with the first and second whipping antennas 121 and 122 is defined. Specifically, the rotating shaft 110 is connected to the start points of the spiral lines of the first stirring antenna 121 and the second stirring antenna 122, that is, the first stirring antenna 121 and the second stirring antenna 122 each spirally extend in a direction away from the rotating shaft 110 with a connection point with the rotating shaft 110 as a start point, and the rotating shaft 110 is connected to the first stirring antenna 121 and the second stirring antenna 122 at a position close to the center. In this way, the first stirring antenna 121 and the second stirring antenna 122 can be driven by the rotating shaft 110 to rotate around the axis close to the center, so as to further improve the microwave radiation effect of the antenna assembly 100 and improve the uniformity of the microwave field intensity in the cooking cavity 211.

In some embodiments, optionally, as shown in fig. 1, 2, and 3, the antenna assembly 100 further includes: the driving part 130 is connected with the rotating shaft 110, and the driving part 130 is used for driving the rotating shaft 110 to drive the stirring antenna 120 to rotate.

In this embodiment, the structure of the antenna assembly 100 is further defined. In order to enable the rotating shaft 110 to drive the first stirring antenna 121 and the second stirring antenna 122 to rotate, a driving portion 130 is further provided in the antenna assembly 100. Specifically, the driving portion 130 is connected to the rotating shaft 110, and the driving portion 130 can drive the rotating shaft 110 to rotate, so that the stirring antenna 120 is driven to rotate by the rotating shaft 110, so that the first stirring antenna 121 and the second stirring antenna 122 can rotate around an axis close to the center. In this way, the microwave radiation effect of the antenna assembly 100 is further improved, so as to improve the uniformity of the microwave field intensity in the cooking cavity 211.

In some embodiments, optionally, as shown in fig. 1, 2 and 3, the driving part 130 includes: a driving shaft 131 connected to the rotation shaft 110; and a driving motor 132 connected to the driving shaft 131, the driving motor 132 driving the rotation shaft 110 to rotate through the driving shaft 131.

In this embodiment, the structure of the driving portion 130 is defined. The driving part 130 comprises a driving shaft 131 and a driving motor 132, wherein the driving shaft 131 is connected with the rotating shaft 110, the driving motor 132 is connected with the driving shaft 131, the driving motor 132 drives the driving shaft 131 to rotate, and then the driving shaft 131 drives the rotating shaft 110 to rotate, so that the rotation of the first stirring antenna 121 and the second stirring antenna 122 is realized. The driving motor 132 and the driving shaft 131 are both positioned outside the cooking cavity 211, so that the influence of high temperature in the cooking cavity 211 on the driving part 130 is avoided, the service life of the driving motor 132 is shortened, and the rotating shaft 110 extends out of the cooking cavity 211 to be connected with the driving shaft 131.

In some embodiments, optionally, the maximum cross-sectional dimension of whip antenna 120 is greater than or equal to 60mm and less than the width of cooking cavity 211.

In this embodiment, the size of the whip antenna 120 is defined. Specifically, the maximum cross-sectional dimension of the whip antenna 120 is greater than or equal to 60mm and less than the width dimension of the cooking cavity 211. In this way, it is possible to secure a sufficient radiation area of the stirrer antenna 120 and to avoid the problem of poor microwave radiation effect due to the undersize of the stirrer antenna 120. Also, by setting the maximum sectional size of the whipping antenna 120 to be smaller than the width of the cooking cavity 211, interference between the whipping antenna 120 and the wall surface of the cooking cavity 211 can be avoided, ensuring normal installation of the antenna assembly 100.

In some embodiments, optionally, as shown in fig. 5, a distance between any adjacent two of the whip antennas 120 is greater than or equal to 5mm and less than or equal to 15mm along an extension direction of the shaft 110.

In this embodiment, the positional relationship between the two whip antennas 120 is further defined. Specifically, the distance d between any adjacent two of the whipping antennas 120 is greater than or equal to 5mm and less than or equal to 15mm in the extending direction of the rotary shaft 110, and the rotary shaft 110 extends in the height direction of the cooking cavity 211, i.e., the distance of any adjacent two of the whipping antennas 120 in the height direction of the cooking cavity 211 is greater than or equal to 5mm and less than or equal to 15mm. It can be appreciated that, if the distance between two adjacent stirring antennas 120 is too small, the microwave radiated between the two adjacent stirring antennas 120 will interfere with each other, which affects the microwave radiation effect, and if the distance between the two adjacent stirring antennas 120 is too large, the installation space occupied by the antenna assembly 100 will be large. In order to avoid the above-mentioned problem, the present application limits the distance between two adjacent stirring antennas 120 to be in the range of 5mm to 15mm, so as to ensure the microwave radiation effect of the antenna assembly 100, and avoid the antenna assembly 100 occupying too large installation space.

The second aspect of the present invention also proposes a cooking appliance 200, as shown in fig. 1, comprising an antenna assembly 100 according to the first aspect of the present invention; the case 210 includes a cooking cavity, the stirrer antenna 120 extends into the cooking cavity 211, and the stirrer antenna 120 is used to radiate microwaves into the cooking cavity 211.

The application provides a cooking utensil 200, including antenna assembly 100 and box 210, the box 210 includes the culinary art chamber 211, and the culinary art chamber 211 is used for holding edible material, and cooking utensil 200 has the microwave heating function, and antenna assembly 100 stretches into the culinary art intracavity, can radiate microwave to the culinary art intracavity 211 through antenna assembly 100 to antenna assembly 100 can also make the microwave field intensity of culinary art intracavity everywhere tend to even, in order to carry out even microwave heating to edible material in the culinary art chamber 211, promotes the culinary art effect.

The cooking appliance 200 according to the second aspect of the present invention, including the antenna assembly according to the first aspect of the present invention, has all the advantages of the antenna assembly 100.

In some embodiments, optionally, as shown in fig. 1, 2 and 3, the cooking appliance 200 further comprises: a microwave generator 220 for generating microwaves; the waveguide 230 is disposed at the bottom wall of the case 210, the waveguide 230 is connected to the microwave generator 220, and the waveguide 230 is used for transmitting the microwaves generated by the microwave generator 220 to the antenna assembly 100.

In this embodiment, the structure of the cooking appliance 200 is further defined. The cooking appliance 200 further includes a microwave generator 220 and a waveguide 230, wherein the microwave generator 220 is used for generating microwaves, the waveguide 230 is used for transmitting the microwaves, the waveguide 230 is arranged at the bottom wall of the box 210 and is connected with the microwave generator 220, the waveguide 230 is provided with an opening, the opening is arranged towards the antenna assembly 100, the microwaves generated by the microwave generator 220 are transmitted to the antenna assembly 100 through the waveguide 230, and the antenna assembly 100 radiates the microwaves into the cooking cavity 211. So as to achieve the effect of microwave heating of the food material in the cooking cavity 211.

In some embodiments, optionally, as shown in fig. 1, 2, and 3, the case 210 includes: a cavity floor 212, the cavity floor 212 constituting a bottom wall of the cooking cavity 211; at least one feed port is provided in the cavity floor 212 through which the waveguide 230 directs microwaves to the antenna assembly 100.

In this embodiment, the structure of the case 210 is defined. The case 210 includes a cavity bottom plate 212, the cavity bottom plate 212 constituting a bottom wall of the cooking cavity 211, the cavity bottom plate 212 being provided with at least one feed port for transmitting microwaves, and the waveguide 230 transmitting the microwaves to the antenna assembly 100 through the feed port to achieve propagation of the microwaves.

In some embodiments, optionally, as shown in fig. 1, 2, and 3, the cavity floor 212 has a mounting slot 213, and the antenna assembly 100 is located within the mounting slot 213.

In this embodiment, the structure of the case 210 is further defined. The cavity floor 212 also has a mounting groove 213, and the bottom wall of the mounting groove 213 is provided with a through hole from which the antenna assembly 100 protrudes into the cooking cavity 211. The antenna assembly 100 is located in the mounting groove 213, so that the antenna assembly 100 can be prevented from occupying other space in the cooking cavity 211, and the space of the cooking cavity 211 for accommodating food is increased, so that the cooking appliance 200 can cook food with larger volume.

In some embodiments, cooking appliance 200 optionally includes a microwave oven or a micro-bake all-in-one machine.

In this embodiment, the cooking appliance 200 includes a microwave oven or a micro-baking all-in-one machine.

In one possible embodiment, the present application proposes an antenna assembly 100.

In a first aspect, the antenna of the conventional scheme is a single-layer metal radiation patch, the antenna assembly 100 proposed in the present application is a novel archimedes spiral antenna, and the antenna assembly 100 adopts an upper and lower two-layer radiation arm structure, which can radiate microwave energy from different vertical heights into the cooking cavity 211. Compared with another common double-layer circular radiation antenna, microwaves generated by the lower-layer metal patch are partially blocked by the upper-layer metal patch, so that the radiation effect is poor. As shown in fig. 7, when the surfaces of the upper and lower layers of radiating arms induce different currents, two paths of different microwave signals can be respectively generated and radiated from the slots.

In a second aspect, the antenna assembly 100 proposed herein is capable of generating circularly polarized electromagnetic waves. An archimedes spiral antenna is a polarization conversion antenna that converts linear polarized electromagnetic waves inside a waveguide (i.e., waveguide 230) into circularly polarized electromagnetic waves. The conventional antenna generates linearly polarized waves for a single-layer metal radiation patch, and the vibration direction of an electric field can only propagate along a certain plane, such as horizontal polarization and vertical polarization. As shown in fig. 8 and 9, the antenna assembly 100 proposed in the present application generates a circularly polarized wave whose electric field vector direction is changed at all times along the propagation direction. The radiating arm of the double-arm helical antenna (i.e., the whip antenna 120) is divided into two paths, one path is extended by right rotation and the other path is extended by left rotation, and since the slit is arc-shaped and continuously turns, the excited displacement current is rotated, thereby exciting left-hand circularly polarized waves (as shown in fig. 9) and right-hand circularly polarized waves (as shown in fig. 8).

The invention provides a double-arm spiral antenna and a microwave oven structure (namely a cooking utensil 200) thereof, microwaves are fed into a waveguide from a magnetron (namely a microwave generator 220) and then pass through the double-arm spiral antenna, as shown in fig. 4, the diameter of the double-arm spiral antenna is phi D=140 mm, the double-arm spiral antenna is divided into two paths, a left-arm spiral structure and a right-arm spiral structure, as shown in fig. 5, the height difference between the upper layer and the lower layer of the two arms is d=5 mm, and the generated two paths of microwaves enter a cavity to heat food, so that the uniform heating effect is realized. As shown in FIG. 10, the antenna assembly 100 has a working center frequency of about 2.45GHz, a relative bandwidth of 100MHz, S11 parameters of-17.28 dB, and the antenna assembly is well matched at the moment, has a smaller reflection coefficient, and can enable most of microwaves to smoothly enter the cavity.

The double-arm spiral antenna is made of metal with the thickness of 1mm, and the same effect of the double-arm spiral antenna can be achieved by using a high-frequency copper-clad dielectric plate or using a ceramic material as a dielectric plate. The double arm helical antenna is sized as follows: as shown in FIG. 4, the diameter of the double-arm helical antenna is phi D, and 60mm phi D is less than or equal to the width of the cavity; as shown in fig. 5, the upper and lower radiation arms have different heights: d is more than or equal to 5mm, the thickness of the antenna is not limited, and the microwave can be output into the cavity in double mode, so that the problem of non-uniform heating of food by the microwave is solved.

The double-arm spiral antenna has the advantages that the upper and lower layers of radiation arms are distributed in a staggered mode, the blocking of microwave signals generated by the upper layer of radiation arms to the lower layer of radiation arms can be reduced, and finally, two layers of uniform radiation microwaves are realized.

In the present invention, the term "plurality" means two or more, unless explicitly defined otherwise. The terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; "coupled" may be directly coupled or indirectly coupled through intermediaries. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

In the description of the present specification, the terms "one embodiment," "some embodiments," "particular embodiments," and 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 present invention. In this specification, schematic representations of the above terms 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.

The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (15)

1. An antenna assembly for a cooking appliance, the cooking appliance including a cooking cavity, the antenna assembly comprising:

a rotating shaft;

the stirring antennas are used for radiating microwaves into the cooking cavity, are connected with the rotating shaft and are sequentially arranged along the extending direction of the rotating shaft, and a space is reserved between any two adjacent stirring antennas.

2. The antenna assembly of claim 1, wherein a plurality of the whip antennas comprise:

a first stirring antenna;

the second stirring antenna is lower than the first stirring antenna in height, and the first stirring antenna and the second stirring antenna are mutually avoided along the direction perpendicular to and towards the upper surface of the first stirring antenna.

3. The antenna assembly of claim 2 wherein,

the shape of the first stirring antenna and the second stirring antenna is spiral.

4. The antenna assembly of claim 2 wherein,

the shape of the first stirring antenna and the second stirring antenna is in an Archimedes spiral line shape.

5. The antenna assembly of claim 4 wherein,

the first stirring antenna and the second stirring antenna are opposite in rotation direction.

6. The antenna assembly of claim 2 wherein,

the rotating shaft is connected to the starting points of spiral lines of the first stirring antenna and the second stirring antenna.

7. The antenna assembly of any one of claims 1 to 6, further comprising:

and the driving part is connected with the rotating shaft and is used for driving the rotating shaft to drive the stirring antenna to rotate.

8. The antenna assembly of claim 7, wherein the driving portion comprises:

the driving shaft is connected with the rotating shaft;

and the driving motor is connected with the driving shaft and drives the rotating shaft to rotate through the driving shaft.

9. The antenna assembly according to any one of claims 1 to 6,

the maximum cross-sectional dimension of the whipping antenna is greater than or equal to 60mm and less than the width of the cooking cavity.

10. The antenna assembly according to any one of claims 1 to 6,

the distance between any two adjacent stirring antennas along the extending direction of the rotating shaft is more than or equal to 5mm and less than or equal to 15mm.

11. A cooking appliance, comprising:

the antenna assembly of any one of claims 1 to 10;

the box body comprises a cooking cavity, the stirring antenna stretches into the cooking cavity, and the stirring antenna is used for radiating microwaves into the cooking cavity.

12. The cooking appliance of claim 11, further comprising:

a microwave generator for generating microwaves;

the waveguide tube is arranged on the bottom wall of the box body, is connected with the microwave generator and is used for transmitting microwaves generated by the microwave generator to the antenna assembly.

13. The cooking appliance of claim 12, wherein the case comprises:

a cavity bottom plate forming a bottom wall of the cooking cavity;

and the waveguide tube transmits microwaves to the antenna component through the feed port.

14. The cooking appliance of claim 13, wherein the cooking appliance further comprises a handle,

the cavity bottom plate is provided with a mounting groove, and the antenna component is positioned in the mounting groove.

15. The cooking appliance according to any one of claims 11 to 14, wherein,

the cooking utensil comprises a microwave oven or a micro-baking integrated machine.