CN117835478A - Surface wave generator and cooking appliance - Google Patents

Abstract

The application discloses a surface wave generator and a cooking appliance. The surface wave generator provided by the embodiment of the application comprises a bottom plate, a first dielectric strip and a second dielectric strip. The first dielectric strip is disposed on the base plate. The second dielectric strips are arranged on the bottom plate, the height of the first dielectric strips is higher than that of the second dielectric strips relative to the bottom plate, the number of the first dielectric strips and the number of the second dielectric strips are multiple, and the first dielectric strips and the second dielectric strips are alternately arranged at intervals along the same direction. In this surface wave generator and cooking device that embodiment provided, through setting up first dielectric strip and second dielectric strip, surface wave generator can stimulate even surface wave for thereby the even heating of food is convenient for to microwave energy distribution more even, can also shorten heating time in order to promote heating efficiency, promotes user experience.

Description

Surface wave generator and cooking appliance

Technical Field

The application relates to the technical field of cooking appliances, in particular to a surface wave generator and a cooking appliance.

Background

In the related art, when a microwave oven heats food, the food is placed on a turntable, and uniform heating of the food can be achieved by rotation of the turntable. However, in the heating process, splash and leakage of stains such as water, grease and the like can occur due to rotation, and the turntable cannot rotate when the motor is damaged, so that food is heated unevenly to influence user experience.

Disclosure of Invention

The embodiment of the application provides a surface wave generator and a cooking appliance.

The surface wave generator provided by the embodiment of the application comprises a bottom plate, a first dielectric strip and a second dielectric strip. The first dielectric strip is disposed on the base plate. The second dielectric strips are arranged on the bottom plate, the height of the first dielectric strips is higher than that of the second dielectric strips relative to the bottom plate, the number of the first dielectric strips and the number of the second dielectric strips are multiple, and the first dielectric strips and the second dielectric strips are alternately arranged at intervals along the same direction.

In some embodiments, the second media strips are disposed on both sides of each of the first media strips.

In certain embodiments, the first dielectric stripe has a dielectric constant in the range of 8-20; and/or the dielectric constant of the second dielectric strip ranges from 2 to 4.

In certain embodiments, the total number of the first media strips and the second media strips is 5-15.

In certain embodiments, the length of the first media strip is parallel to the length of the second media strip.

In certain embodiments, the width of the first media strip ranges from 15mm to 40mm; and/or the width of the second medium strip ranges from 9mm to 19mm.

In certain embodiments, the height of the first media strip and/or the second media strip ranges from 1.5mm to 15mm.

The cooking electric appliance provided by the embodiment of the application comprises a cavity and the surface wave generator in any embodiment. The cavity has a cooking chamber. The surface wave generator is configured to generate a surface wave that acts on a predetermined space of the cooking chamber.

In some embodiments, the cavity has a perspective window through which the cooking chamber is exposed from a plurality of different directions, wherein an included angle between the two directions is greater than or equal to 90 degrees, the perspective window being capable of shielding microwaves.

In some embodiments, the cavity comprises a tray and a shroud selectively covering or separating from the tray, the tray for carrying an object to be cooked, the tray and shroud enclosing the cooking chamber, the shroud having the perspective window.

In this surface wave generator and cooking device that embodiment provided, through setting up first dielectric strip and second dielectric strip, surface wave generator can stimulate even surface wave for thereby the even heating of food is convenient for to microwave energy distribution more even, can also shorten heating time in order to promote heating efficiency, promotes user experience.

Additional aspects and advantages of embodiments of the application 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 application.

Drawings

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

FIG. 1 is a schematic cross-sectional view of a surface wave generator according to an embodiment of the present application;

fig. 2 is a schematic structural view of a cooking appliance according to an embodiment of the present application;

FIG. 3 is a graph of the surface field strength profile of a surface wave generator according to an embodiment of the present application;

FIG. 4 is a schematic top view of a surface wave generator of an embodiment of the present application;

fig. 5 is another schematic view of the structure of the cooking appliance of the embodiment of the present application;

fig. 6 is a further schematic view of the structure of the cooking appliance of the embodiment of the present application;

fig. 7 is a further schematic view of the structure of the cooking appliance according to the embodiment of the present application;

fig. 8 is a further schematic view of the structure of the cooking appliance according to the embodiment of the present application;

fig. 9 is a further schematic view of the structure of the cooking appliance according to the embodiment of the present application;

fig. 10 is a further schematic view of the structure of the cooking appliance according to the embodiment of the present application;

fig. 11 is a further schematic view of the structure of the cooking appliance of the embodiment of the present application;

fig. 12 is a further schematic view of the structure of the cooking appliance according to the embodiment of the present application;

fig. 13 is a further schematic view of the structure of the cooking appliance of the embodiment of the present application.

Description of main reference numerals:

cooking appliance 100, cavity 10, tray 11, enclosure 12, side wall 121, top wall 122, cooking chamber 101, see-through window 102, surface wave generator 20, bottom plate 21, first dielectric strip 22, second dielectric strip 23, microwave source 30.

Detailed Description

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

In the description of the present application, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," etc. indicate or are based on the orientation or positional relationship shown in the drawings, merely for convenience of description and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more of the described features. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically connected, electrically connected or can be communicated with each other; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.

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

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

Referring to fig. 1, a surface wave generator 20 according to an embodiment of the present application includes a bottom plate 21, a first dielectric strip 22, and a second dielectric strip 23. The first dielectric strip 22 is arranged on the base plate 21. The second dielectric strips 23 are disposed on the bottom plate 21, and the height H1 of the first dielectric strips 22 is higher than the height H2 of the second dielectric strips 23 relative to the bottom plate 21, and the number of the first dielectric strips 22 and the second dielectric strips 23 is multiple, and the first dielectric strips 22 and the second dielectric strips 23 are alternately arranged at intervals along the same direction.

In the related art, when a microwave oven heats food, the food is placed on a turntable, and uniform heating of the food can be achieved by rotation of the turntable. However, during the heating process, water, grease and other stains can splash and leak due to rotation, and the stains flow into a motor to cause winding short circuit or gear damage, so that the turntable does not rotate, and finally, the food is heated unevenly.

In the surface wave generator 20 provided in this application embodiment, through setting up first dielectric strip 22 and second dielectric strip 23, surface wave generator 20 can stimulate even surface wave for thereby the even heating of food is convenient for to microwave energy distribution more even, can also shorten heating time in order to promote heating efficiency, promotes user experience.

The even heating of the food by the cooking appliance 100 can be realized while the arrangement of the rotating parts is omitted, and the structural complexity of the cooking appliance 100 is reduced. The use of a surface wave generator 20 with a first dielectric strip 22 and a second dielectric strip 23 also enables a low profile surface wave generator 20.

The surface wave generator 20 may be used for a cooking appliance 100, the cooking appliance 100 being formed with a cooking chamber 101. Referring to fig. 2, in some embodiments, the cooking appliance 100 includes a microwave source 30, the microwave source 30 being configured to provide energy to the surface wave generator 20 to excite the surface wave generator 20 to generate surface waves. Thus, the microwave source 30 can excite the surface wave generator 20 to generate high-power electromagnetic waves and radiate uniform surface waves, thereby improving the heating uniformity of the cooking appliance 100. Specifically, the microwave source 30 may be a magnetron or a semiconductor, and is not limited herein.

The microwave source 30 can excite a uniform surface wave in the cooking chamber 101 and the surface wave generator 20, and the first medium strip 22 and the second medium strip 23 are used for guiding the electromagnetic wave to propagate by utilizing a slow wave structure, so that the propagation speed of the electromagnetic wave is smaller than the wave speed of a free space, and the electromagnetic wave propagates along the axial direction of the structure according to a rule, namely the surface wave.

Under the condition that the cooking electric appliance 100 is empty, the surface wave generator 20 shown in fig. 2 is subjected to structural simulation, so that electric field distribution in the cooking electric appliance 100 under a certain working frequency is obtained, and the result is shown in fig. 3. The longitudinal electric field distribution of the surface waves generated by the first and second dielectric strips 22, 23 is such that the microwave source 30 is capable of exciting the first and second dielectric strips 22, 23 to generate a uniform longitudinal surface wave, and the surface wave energy is capable of covering a substantial portion of the cooking appliance 100 with less reflection. Therefore, the microwave source 30 within the cavity 10 of the cooking appliance 100 can achieve a good match with the first and second dielectric strips 22 and 23, thereby improving the heating uniformity of the cooking appliance 100.

Specifically, the bottom plate 21 may be made of a metal material, and the bottom plate 21 may be circular, square, or other shapes, which is not limited herein. The first dielectric strip 22 and the second dielectric strip 23 are made of metal materials, for example, copper, aluminum and other metals with good conductivity. The first and second dielectric stripes 22 and 23 may be rectangular parallelepiped, and the first and second dielectric stripes 22 and 23 are alternately arranged on the bottom plate 21 at intervals. In some embodiments, the first media strip 22 and the second media strip 23 may also be cylindrical, etc., without limitation.

In some embodiments, the first media strip 22 and the second media strip 23 may have a tray 11 disposed thereon, and the tray 11 may be used to carry food. The tray 11 may be made of a material having high heat resistance and being penetrable by microwaves, such as ceramic, glass, or heat-resistant plastic. The excitation of the microwave source 30 causes the first and second strips 22, 23 to produce a uniform longitudinal surface wave that penetrates the tray 11 to heat the food on the tray 11.

Referring to fig. 1, in some embodiments, second media strips 23 are disposed on both sides of each first media strip 22. In this way, the first medium strips 22 and the second medium strips 23 can be alternately arranged, so that the energy distribution of microwaves is more uniform, and the uniform heating of food is facilitated.

In some embodiments, the first dielectric strips 22 and the second dielectric strips 23 are alternately and equidistantly arranged such that the microwaves generated by the surface wave generator 20 are uniform, thereby uniformly heating the food heated by the microwaves.

In certain embodiments, the first dielectric stripe 22 has a dielectric constant in the range of 8-20; and/or the dielectric constant of the second dielectric stripes 23 is in the range of 2-4. In this way, the dielectric constants of the first dielectric strip 22 and the second dielectric strip 23 are adjusted to adjust the height and width of the microwave distribution, so that the surface wave generator 20 emits uniform surface waves, which is beneficial to uniformly heating food, ensuring the taste of the food and improving the heating rate.

It is understood that the dielectric constant of the first dielectric stripe 22 is greater than that of the second dielectric stripe 23, and the first dielectric stripe 22 and the second dielectric stripe 23 are alternately arranged at intervals in the same direction.

Specifically, the dielectric constant of the first dielectric stripe 22 may be 8, 8.5, 10, 10.5, 10.9, 11, 13, 15.4, 17.6, 19.8 or 20, or the dielectric constant of the first dielectric stripe 22 may be any value within a range of values defined by any two of the above values. In one embodiment, the first dielectric stripe 22 has a dielectric constant of 10.

The dielectric constant of the second dielectric stripe 23 may be 2, 2.5, 2.7, 2.8, 3.1, 3.2, 3.5, 3.6, 3.8 or 4, or the dielectric constant of the second dielectric stripe 23 may be any value within a range of values defined by any two of the above values. In one embodiment, the dielectric constant of the second dielectric stripe 23 is 3.4.

In some embodiments, the first dielectric strips 22 with high dielectric constant are alternately arranged in parallel with the second dielectric strips 23 with low dielectric constant, which are alternately parallel, to ensure that the surface wave generator 20 can excite a uniform surface wave, so that the energy distribution of the microwave is more uniform.

In certain embodiments, the total number of first media strips 22 and second media strips 23 is 5-15. In this way, the total number of the first dielectric strips 22 and the second dielectric strips 23 can be adjusted to adjust the height and the width of the microwave distribution, so that the surface wave generator 20 can excite uniform surface waves, the energy distribution of the microwaves is more uniform, the food can be heated uniformly, and the taste of the food is ensured while the heating rate is improved.

Specifically, the total number of the first media stripes 22 and the second media stripes 23 may be 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, or 15, or the total number of the first media stripes 22 and the second media stripes 23 may be any value within a numerical range defined by any two of the above-mentioned values. In one embodiment, the total number of first media strips 22 and second media strips 23 is 15.

When the total number of the first dielectric stripes 22 and the second dielectric stripes 23 is less than 5, the energy of the surface waves generated by the first dielectric stripes 22 and the second dielectric stripes 23 when excited is made smaller. When the total number of the first dielectric stripes 22 and the second dielectric stripes 23 is larger than 15, the surface wave generator 20 is made large in size, which is disadvantageous in a miniaturized design.

In one embodiment, the number of first media strips 22 is 2 and the number of second media strips 23 is 3, the second media strips 23 alternating with the first media strips 22. In yet another embodiment, the number of first media strips 22 is 5, the number of second media strips 23 is 5, and the second media strips 23 are disposed with the first media strips 22.

Referring to fig. 1 and 4, in some embodiments, the length of the first media strip 22 is parallel to the length of the second media strip 23. In this way, the first medium strips 22 and the second medium strips 23 are arranged in parallel and alternately, so that the first medium strips 22 and the second medium strips 23 can emit uniform surface waves after being excited, and the uniform surface waves can realize uniform heating of food.

In certain embodiments, the width W1 of the first media strip 22 ranges from 15mm to 40mm. Specifically, the width W1 of the first media strip 22 may be 15mm, 17mm, 19mm, 20mm, 24mm, 26mm, 30mm, 31mm, 35mm, 39mm, or 40mm, or the width W1 of the first media strip 22 may be any value within a range of values defined by any two of the above. In one embodiment, the width W1 of the first media strip 22 is 25mm.

When the width W1 of the first dielectric strip 22 is less than 15mm, the area of the surface wave generated by the first dielectric strip 22 when excited is made smaller, resulting in a reduction in the heating rate of the food; when the width W1 of the first dielectric stripe 22 is greater than 40mm, the area of the surface wave generator 20 is made larger, which is disadvantageous for a miniaturized design.

In certain embodiments, the width W2 of the second media strip 23 ranges from 9mm to 19mm. Specifically, the width W2 of the second media strip 23 may be 9mm, 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, 16mm, 17mm, 18mm, or 19mm, or the width W2 of the second media strip 23 may be any value within a range of values defined by any two of the above values. In one embodiment, the width W2 of the second media strip 23 is 25mm.

Similarly, when the width W2 of the second dielectric stripe 23 is smaller than 9mm, the area of the surface wave generated by the second dielectric stripe 23 when excited is made smaller, resulting in a decrease in the heating rate of the food; when the width W2 of the second dielectric stripe 23 is larger than 19mm, the area of the surface wave generator 20 is made larger, which is disadvantageous for a miniaturized design.

In some embodiments, the width W1 of the first media strip 22 ranges from 15mm to 40mm and the width W2 of the second media strip 23 ranges from 9mm to 19mm.

In certain embodiments, the height H1 of the first media strip 22 ranges from 1.5mm to 15mm. Specifically, the height H1 of the first media strip 22 may be 1.5mm, 3mm, 5mm, 5.9mm, 7mm, 10mm, 11mm, 11.6mm, 12mm, 14mm, or 15mm, or the height H1 of the first media strip 22 may be any value within a range of values defined by any two of the above. In one embodiment, the height H1 of the first media strip 22 is 10.4mm.

When the height H1 of the first dielectric strip 22 is less than 1.5mm, the height of the surface wave generated by the first dielectric strip 22 when excited is made smaller, resulting in a reduction in the heating rate of the food; when the height H1 of the first dielectric stripe 22 is greater than 15mm, the surface wave generator 20 is made large, which is disadvantageous in a miniaturized design.

In certain embodiments, the height H2 of the second media strip 23 ranges from 1.5mm to 15mm. Specifically, the height H2 of the second media bar 23 may be 1.5mm, 3.5mm, 4mm, 6mm, 7.8mm, 11mm, 12mm, 12.7mm, 13mm, 14mm, or 15mm, or the height H2 of the second media bar 23 may be any value within a range of values defined by any two of the above values. In one embodiment, the height H2 of the second media strip 23 is 12mm.

Similarly, when the height H2 of the second dielectric strip 23 is less than 1.5mm, the height of the surface wave generated by the second dielectric strip 23 when excited is made smaller, resulting in a reduction in the heating rate of the food; when the height H2 of the second dielectric stripe 23 is greater than 15mm, the volume of the surface wave generator 20 is made large, which is disadvantageous for a miniaturized design.

In certain embodiments, the first media strip 22 height H1 ranges from 1.5mm to 15mm and the second media strip 23 height H2 ranges from 1.5mm to 15mm.

The cooking electric appliance 100 provided in the embodiment of the present application includes the cavity 10 and the surface wave generator 20 described in any of the embodiments above. The cavity 10 has a cooking chamber 101. The surface wave generator 20 is for generating a surface wave that acts on a predetermined space of the cooking chamber 101.

In this way, the cooking appliance 100 can heat the food in the cavity 10 by using the surface wave generated by the surface wave generator 20, and the surface wave generator 20 can excite a uniform surface wave to uniformly heat the food, so that the heating time can be shortened to improve the heating efficiency. The even heating of the food by the cooking appliance 100 can be realized while the arrangement of the rotating parts is omitted, and the structural complexity of the cooking appliance 100 is reduced.

The cavity 10 may have a substantially rectangular parallelepiped shape, a spherical shape, a cylindrical shape, or the like. The cooking appliance 100 may include, but is not limited to, a microwave oven, a microwave rice cooker, a micro-steaming and baking all-in-one machine, and the like.

It should be noted that the predetermined space is a side of the cooking chamber 101 near the surface wave generator 20, and the surface wave generator 20 can emit a uniform surface wave in the predetermined space.

In some embodiments, the cavity 10 has a transparent window 102 through which the cooking chamber 101 is exposed from a plurality of different directions, wherein the angle between the two directions is greater than or equal to 90 degrees, and the transparent window 102 is capable of shielding microwaves.

In this way, the user can observe the heating state of the food in the cooking chamber 101 from a plurality of different directions through the perspective window 102, so that the observation field of view is wider to improve the use experience of the user, and the perspective window 102 can also shield microwaves to avoid microwave leakage.

In particular, the see-through window 102 is made of glass or plastic or other see-through material. And the light transmittance of the transparent window 102 is greater than that of the transparent window 102, so as to ensure that the user can clearly observe the internal state of the cooking chamber 101 through the transparent window 102. Among them, the transparent window 102 may be made of glass material having high heat resistance and high transmittance, and has a property of shielding microwaves. The shape of the perspective window 102102 may be circular, rectangular, or other shapes.

Referring to fig. 5-7, in some embodiments, the number of perspective windows 102 is at least two, wherein the angle between the orientations of the two perspective windows 102 is greater than or equal to 90 degrees. In this way, the user can view the cooking chamber 101 through the plurality of perspective windows 102, and can also view from the remaining perspective windows 102 when one of the moisture shields the perspective window 102.

Referring to fig. 5, in one embodiment, the cooking appliance 100 is rectangular and has two perspective windows 102 on the cavity 10, wherein one perspective window 102 faces to the right, the other perspective window 102 faces upward, and an angle between the two perspective windows 102 is 90 °.

Referring to fig. 6, in another embodiment, the cooking apparatus 100 is cylindrical, and the cavity 10 has two perspective windows 102, wherein one perspective window 102 faces forward, the other perspective window 102 faces upward, and an angle between the two perspective windows 102 is 90 °.

Referring to fig. 7, in still another embodiment, the cooking apparatus 100 is cylindrical, and the cavity 10 has three perspective windows 102, wherein one perspective window 102 faces to the left, the other perspective window 102 faces to the front, and the angle between the orientations of any two perspective windows 102 is 90 °, so that a user can observe the cooking chamber 101 through the three perspective windows 102, thereby improving the user experience.

Referring to fig. 2, in some embodiments, the cavity 10 includes a tray 11 and a cover 12, the cover 12 is selectively covered on the tray 11 or separated from the tray 11, the tray 11 is used for carrying an object to be cooked, the tray 11 and the cover 12 enclose a cooking chamber 101, and the cover 12 has a perspective window 102.

Thus, when cooking food, a user can cover the enclosure 12 on the tray 11 to form the cooking chamber 101 so as to heat the food, and after heating, the user can separate the enclosure 12 from the tray 11 so as to take the food from the tray 11. Wherein the tray 11 is detachably connected with the enclosure 12, and the enclosure 12 can be selectively covered on the tray 11 or separated from the tray 11.

In some embodiments, the surface wave generator 20 can be disposed below the tray 11. In this manner, the surface waves generated by the surface wave generator 20 may pass through the tray 11 into the cooking chamber 101 to heat the items in the cooking chamber 101. Specifically, the tray 11 may be made of a material having good heat resistance, wherein the shape of the tray 11 may be circular, rectangular, etc., without limitation.

Referring to fig. 8, in some embodiments, the enclosure 12 of the cavity 10 may include a sidewall 121 and a top wall 122 connected to the top wall 122, the number of the sidewalls 121 being plural, and at least two of the sidewalls 121 and the top wall 122 being formed with the see-through window 102. Thus, when one of the water vapor shields the perspective window 102, the user can observe the state in the cooking chamber 101 from the other perspective window 102, and the user can observe the state in the cooking chamber 101 from a plurality of angles through the perspective window 102 to improve the user experience.

Referring to fig. 9, in one embodiment, a top wall 122 and one of side walls 121 of cooking appliance 100 are formed with a perspective window 102, and a user can observe a state in cooking chamber 101 through top wall 122 and perspective window 102 on side wall 121.

Referring to fig. 10, in still another embodiment, a perspective window 102 is formed on a top wall 122 and two side walls 121 of the cooking appliance 100, and the two side walls 121 with the perspective window 102 are disposed opposite to each other.

Referring to fig. 11 and 12, in another embodiment, a perspective window 102 is formed on a top wall 122 and two side walls 121 of the cooking appliance 100, and the two side walls 121 with the perspective window 102 are vertically disposed.

Referring to fig. 13, in still another embodiment, perspective windows 102 are formed on a top wall 122 and four side walls 121 of the cooking appliance 100, and a cup containing milk is placed on a tray 11 in the cooking chamber 101, so that a user can observe the state of the cup in the cooking chamber 101 through the perspective windows 102 on the top wall 122 and the four side walls 121, and the observation angle of the user can be enlarged to improve the user experience.

It will be appreciated that in some embodiments, the area of the see-through window 102 may be smaller than the area of the side walls 121 and/or the top wall 122, as shown in fig. 12. In one embodiment, the side wall 121 and the top wall 122 of the cooking appliance 100 are provided with perspective windows 102, and a user can observe the heating state of food in the cooking chamber 101 through the perspective windows 102 on the side wall 121 and the top wall 122.

In the description of the present specification, reference is made to the description of the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., meaning that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

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

Claims (10)

1. A surface wave generator, comprising:

a bottom plate;

a first dielectric strip disposed on the base plate;

the second dielectric strips are arranged on the bottom plate, the height of the first dielectric strips is higher than that of the second dielectric strips relative to the bottom plate, the number of the first dielectric strips and the number of the second dielectric strips are multiple, and the first dielectric strips and the second dielectric strips are alternately arranged at intervals along the same direction.

2. The surface wave generator of claim 1, wherein the second dielectric strips are disposed on both sides of each of the first dielectric strips.

3. The surface wave generator of claim 1, wherein the first dielectric strip has a dielectric constant in the range of 8-20; and/or the dielectric constant of the second dielectric strip ranges from 2 to 4.

4. The surface wave generator of claim 1, wherein the total number of the first and second dielectric strips is 5-15.

5. The surface wave generator of claim 1, wherein the length of the first dielectric strip is parallel to the length of the second dielectric strip.

6. The surface wave generator of claim 1, wherein the first dielectric strip has a width in the range of 15mm-40mm; and/or the width of the second medium strip ranges from 9mm to 19mm.

7. The surface wave generator of claim 1, wherein the first dielectric strip and/or the second dielectric strip has a height in the range of 1.5mm-15mm.

8. A cooking appliance, comprising:

a cavity having a cooking chamber; and

the surface wave generator of any one of claims 1-7 for generating a surface wave that acts on a predetermined space of the cooking chamber.

9. The cooking appliance of claim 8, wherein the cavity has a perspective window through which the cooking chamber is exposed from a plurality of different directions, wherein an included angle between the two directions is greater than or equal to 90 degrees, the perspective window being capable of shielding microwaves.

10. The cooking appliance of claim 9, wherein the cavity comprises a tray and a shroud selectively covering or separating from the tray, the tray for carrying an object to be cooked, the tray and shroud enclosing the cooking chamber, the shroud having the perspective window.