CN118870588A

CN118870588A - Microwave generating components and cooking equipment

Info

Publication number: CN118870588A
Application number: CN202411103127.6A
Authority: CN
Inventors: 刘奇; 司鹏; 陈麒安
Original assignee: Guangdong Midea Kitchen Appliances Manufacturing Co Ltd
Current assignee: Guangdong Midea Kitchen Appliances Manufacturing Co Ltd
Priority date: 2024-08-12
Filing date: 2024-08-12
Publication date: 2024-10-29

Abstract

An embodiment of the present invention provides a microwave generating assembly and a cooking device, wherein the microwave generating assembly includes: a box; a magnetron, at least partially disposed outside the box; a waveguide feed port, disposed on the wall of the box, the waveguide feed port being provided with a waveguide antenna; a waveguide tube, one end of the waveguide tube being connected to the magnetron, and the other end being connected to the waveguide feed port, the microwaves emitted by the magnetron being fed into the interior of the box through the waveguide tube and the waveguide antenna; wherein the waveguide antenna includes a plurality of sub-regions disposed around the geometric center of the waveguide feed port, each of which is provided with at least a portion of the waveguide ports. In the technical solution of the present invention, since the plurality of waveguide ports are evenly arranged around the geometric center of the waveguide feed port, the even distribution of microwave energy is achieved through the even arrangement of the plurality of waveguide ports.

Description

Microwave generating assembly and cooking apparatus

Technical Field

The invention relates to the technical field of microwaves, in particular to a microwave generation assembly and cooking equipment.

Background

At present, a microwave oven is a common kitchen appliance, when a flat-plate microwave oven is operated, the heating uniformity is poor, in the related technology, a stirring system is arranged in the microwave oven, and microwaves are stirred by driving a motor to rotate in a physical mode, but the space occupied by the structure of the system is large, so that the volume rate of the whole machine is low.

Disclosure of Invention

The invention aims to at least solve the technical problems of overlarge occupied space and lower volume rate caused by the fact that the structure occupies too much space by adopting a physical mode for microwave stirring in the prior art or related technologies.

In view of this, embodiments of the first aspect of the present invention provide a microwave generating assembly.

Embodiments of the second aspect of the present invention provide a cooking apparatus.

To achieve the above object, an embodiment of a first aspect of the present invention provides a microwave generating assembly, including: a case; a magnetron at least partially disposed outside the housing; the waveguide feed port is arranged on the wall surface of the box body and is provided with a waveguide antenna; the microwave emitted by the magnetron is fed into the box body through the waveguide tube by the waveguide antenna; the waveguide antenna comprises a plurality of subareas which are arranged around the geometric center of the waveguide feed port, and at least part of waveguide ports are arranged in each subarea.

The microwave generating assembly comprises a box body, a magnetron, a waveguide tube, a waveguide antenna, a waveguide feed port and the like, wherein the box body is of a main body structure of the whole microwave oven, and the waveguide tube, the waveguide feed port, the magnetron and the like which are arranged in the box body are contained and protected. Wherein the magnetron is used to generate microwave energy. The magnetron is at least partially arranged outside the box body and connected with the waveguide feed port through a waveguide tube, and the waveguide tube is used for transmitting microwave energy emitted by the magnetron. The waveguide feed port can feed microwave energy transmitted by the waveguide into the box body through the waveguide antenna. The waveguide antenna is arranged on the waveguide feed port, and the waveguide antenna is provided with the plurality of waveguide ports, so that microwave energy can be uniformly distributed in the cavity through the plurality of waveguide ports under the action of the waveguide antenna. The waveguide antenna is divided into a plurality of subareas which are arranged around the geometric center, and a part or an integer number of waveguide ports are arranged in each subarea, so that microwave energy distribution is realized.

Further, the plurality of waveguide ports are uniformly arranged around the geometric center of the waveguide feed port, and uniform distribution of microwave energy is achieved through uniform arrangement of the plurality of waveguide ports.

It is emphasized that the design of the waveguide antenna and the plurality of waveguide ports arranged at the top eliminates the bottom stirring system and the antenna structure, releases the bottom space of the cavity, remarkably improves the volume ratio of the whole machine, simplifies the internal structure, reduces the number of parts and reduces the production cost. Meanwhile, microwave energy can be uniformly distributed in the cavity, so that food can be uniformly heated.

Since the waveguide antenna arranged at the top of the box body is provided with the plurality of waveguide ports which are uniformly arranged, when food is placed on the inner partition plate of the box body, microwaves can be respectively radiated through the waveguide ports at different positions, so that the microwaves can be ensured to be simultaneously heated to the food at the left side and the right side of the inner partition plate, the energy distribution can be further changed by adjusting the positions of the different feed ports, and the effect of uniform cooking can be achieved.

In some embodiments, optionally, the wavelength of the microwave fed into the waveguide tube by the magnetron is the first wavelength λ _g, where the width of the waveguide port is λ _g/2.

In this technical solution, by limiting the width of the waveguide port by a numerical value, the wavelength of the microwave generated by the magnetron when fed into the waveguide is the first wavelength λ _g, so as to ensure matching with the waveguide and the waveguide feed port. By limiting the width of the waveguide port to half the first wavelength, i.e., lambda _g/2, the microwaves are not unnecessarily reflected and energy lost during transmission, thereby ensuring efficient transmission and uniform distribution of microwave energy.

Further, the width of the waveguide port is greater than or equal to 10mm.

In some embodiments, optionally, the shape of the waveguide port includes a rectangular through hole and/or an arcuate through hole.

In the technical scheme, the shape of the waveguide port can be rectangular, and the rectangular through holes can provide stable microwave radiation, so that uniform distribution of microwave energy is facilitated. Wherein the size of the rectangular through holes needs to be precisely designed according to the wavelength and the desired microwave energy distribution to avoid energy loss and to ensure uniform heating.

Or the shape of the waveguide port can be arc-shaped, the arc-shaped through holes provide a microwave radiation mode different from that of the rectangular through holes, more complex microwave field distribution can be created, the arc-shaped through holes are beneficial to improving the propagation path of microwave energy in the cavity, reducing hot spots and cold spots and further improving heating uniformity. Of course, the design of the arc-shaped through holes needs to consider the reflection and refraction characteristics of microwaves to optimize the propagation efficiency of microwaves in the cavity.

Wherein different shapes of the waveguide ports can provide different microwave radiation modes, which helps to optimize the distribution of the microwave field.

In some embodiments, the plurality of waveguide ports are optionally disposed axisymmetrically about an axis of symmetry passing through a geometric center of the waveguide feed port.

In the technical scheme, the plurality of waveguide ports are arranged in an axisymmetric mode, so that microwave energy is uniformly distributed in the cavity, hot spots and cold spots in the heating process are reduced, and uniform heating of food is realized. By an axisymmetric waveguide port layout, a more uniform and optimized microwave field can be created, thereby improving heating efficiency.

It will be appreciated that the axisymmetric design simplifies the distribution pattern of microwave energy.

In some embodiments, the plurality of waveguide ports are optionally disposed centrally symmetrically about a geometric center of the waveguide feed port.

In the technical scheme, the plurality of waveguide ports are arranged in a central symmetry manner, so that microwave energy is uniformly distributed in the cavity, hot spots and cold spots in the heating process are reduced, and uniform heating of food is realized. By a centrally symmetrical waveguide port layout, a more uniform and optimized microwave field can be created, thereby improving heating efficiency.

For the entire system, by using the waveguide feed as the entry point for microwave energy into the cavity, the position and design of the waveguide feed is critical to the performance of the entire system. The waveguide antenna is connected with the waveguide feed port and the magnetron and transmits microwave energy to the box body. By a centrally symmetrical waveguide port layout a more uniform and optimized microwave field can be created.

It can be appreciated that by providing the waveguide ports centrally symmetrically, not only are heating efficiency and food quality improved, but also the design and tuning process of the microwave cooking system is simplified. By precisely controlling the number, shape, size and layout of the waveguide ports, the performance and user experience of the microwave oven can be remarkably improved.

In some embodiments, optionally, the method further includes: the reflecting plate is arranged in the box body, and the reflecting plate and the waveguide feed port are arranged on two opposite wall surfaces in the box body.

In the technical scheme, the reflecting plate is arranged in the box body and is arranged on the wall surface opposite to the waveguide feed port, so that the distribution and reflection of microwave energy can be further optimized. The reflecting plate can reflect microwave energy, so that the microwaves are reflected for multiple times in the box body, and the utilization rate of the microwave energy is improved. The reflecting plate is favorable for changing the propagation path of microwaves in the cavity, reducing energy loss and improving heating efficiency and uniformity. Through the design of the reflecting plate, the dead zone of microwaves in the cavity can be reduced, and the microwave energy can be ensured to cover each corner of the cavity.

Wherein, the reflecting plate is arranged in the box body and is opposite to the waveguide feed port for reflecting microwave energy. The waveguide feed port is arranged on the wall surface of the box body and is used for transmitting microwave energy to the cavity. The reflecting plate and the waveguide feed port are respectively arranged on two opposite wall surfaces in the box body, which is beneficial to realizing uniform distribution of microwave energy.

Further, the material of the reflective plate needs to have good microwave reflection performance, and also needs to consider factors such as high temperature resistance and corrosion resistance. The size and shape of the reflector plate needs to be designed according to the size and shape of the cavity to ensure efficient reflection and distribution of microwave energy. By adjusting the position of the reflecting plate, the distribution of microwave energy in the cavity can be further controlled, and finer heating control is realized.

Under the action of the reflecting plate, the propagation path of microwave energy in the cavity is optimized by reflecting the microwave energy, and the energy loss and the heating dead zone are reduced, so that the heating efficiency and the uniformity are improved.

Of course, by precisely controlling the number, position, size and shape of the reflecting plates, the performance and user experience of the microwave oven can be further improved.

In some embodiments, optionally, the reflective plate includes: and one side of the substrate facing the waveguide feed port is provided with a diffuse reflection part.

In the technical scheme, the reflecting plate comprises a substrate and a diffuse reflection part, so that the distribution and reflection of microwave energy are further optimized. The diffuse reflection part can enable microwave energy to be distributed more uniformly in the cavity, hot spots and cold spots are reduced, and heating efficiency is improved. In addition, the diffuse reflection part is beneficial to improving the propagation path of microwave energy in the cavity, reducing energy loss and improving heating uniformity. Through the design of diffuse reflection portion, can ensure that food heats more evenly in microwave oven chamber internal heating to promote user's culinary art experience.

The substrate, which is the main structure of the reflection plate, is generally made of a material having good microwave reflection performance. And one side of the substrate facing the waveguide feed port is provided with a diffuse reflection part for optimizing the distribution of microwave energy.

By optimizing the propagation path of microwave energy within the cavity under the action of the diffuse reflection section, the energy distribution and heating uniformity are improved. By precisely controlling the number, position, size and shape of the diffuse reflection parts, the performance and user experience of the microwave oven can be further improved.

In some embodiments, optionally, the diffuse reflection portion includes: a protruding portion, the surface of the protruding portion being non-parallel to the substrate; and/or a recess, the surface of the recess being non-parallel to the substrate.

In this technical scheme, the diffuse reflection portion includes at least one of bellying and depressed part, and the microwave can produce the reflection when transmitting to the bellying, because be nonparallel between bellying's surface and the base plate, the microwave can form the diffuse reflection, and similarly, to the depressed part, the microwave also can produce the diffuse reflection when transmitting to the depressed part. The non-parallel design of the surfaces of the protrusions and recesses may allow for a more uniform distribution of microwave energy within the cavity under the influence of at least one of the protrusions and recesses.

In some embodiments, optionally, the reflective plate and the waveguide feed port are disposed on top and bottom walls of the case; or the reflecting plate and the waveguide feed port are arranged on the left side wall and the right side wall of the box body.

In the technical scheme, the reflecting plate and the waveguide feed port can be arranged on different wall surfaces of the box body, so that the distribution and reflection of microwave energy can be optimized. Specifically, the reflecting plate and the waveguide feed port can be respectively arranged on the top wall and the bottom wall of the box body, or can be respectively arranged on the left side wall and the right side wall of the box body, and the propagation path of microwave energy in the cavity can be improved, the energy loss is reduced, and the heating efficiency is improved by adjusting the positions of the reflecting plate and the waveguide feed port.

Of course, the different arrangements of the reflecting plate and waveguide feed-through helps to improve the uniformity of microwave energy within the cavity, and thus the heating uniformity.

Wherein, through carrying out different overall arrangement to reflecting plate and waveguide feed port, can optimize the propagation path of microwave energy in the cavity, improved energy distribution and heating homogeneity. Further, the number, position, size and shape of the reflecting plates and the waveguide feed-through ports can be precisely controlled, so that the performance and user experience of the microwave oven are improved.

Embodiments of the second aspect of the present application provide a cooking apparatus comprising: a housing; the microwave generating assembly is arranged on the shell.

According to the present application there is provided a cooking apparatus comprising a housing and a microwave generating assembly, the housing being an enclosure of a microwave oven, typically made of metal, for protecting a user from microwave radiation and providing a structure to house the internal components. The cooking device comprises any one of the microwave generating components, so that the cooking device has the beneficial effects of any one of the microwave generating components, and the description is omitted herein.

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

FIG. 1 shows a schematic structural view of a microwave generating assembly according to one embodiment of the invention;

FIG. 2 shows a schematic structural view of a microwave generating assembly according to an embodiment of the invention;

FIG. 3 shows a schematic view of the structure of a waveguide according to one embodiment of the present invention;

fig. 4 illustrates a schematic structural view of a reflection plate according to an embodiment of the present invention;

fig. 5 illustrates a schematic structural view of a reflection plate according to an embodiment of the present invention;

Fig. 6 illustrates a schematic structural view of a reflection plate according to an embodiment of the present invention;

Fig. 7 shows a schematic structural diagram of a waveguide antenna according to an embodiment of the present invention;

fig. 8 shows a schematic structural diagram of a waveguide antenna according to an embodiment of the present invention;

Fig. 9 shows a schematic structural diagram of a waveguide antenna according to an embodiment of the present invention;

fig. 10 shows a schematic structural diagram of a waveguide antenna according to an embodiment of the present invention;

fig. 11 shows a schematic structural diagram of a waveguide antenna according to an embodiment of the present invention;

fig. 12 illustrates a schematic structural view of a cooking apparatus according to an embodiment of the present invention;

fig. 13 is a schematic view showing a structure in which a reflection plate performs specular reflection according to an embodiment of the present invention;

Fig. 14 is a schematic view showing a structure in which a reflection plate performs diffuse reflection according to an embodiment of the present invention.

The correspondence between the reference numerals and the component names in fig. 1 to 14 is:

100: a microwave generating assembly; 102: a case; 104: a magnetron; 106: a waveguide; 1062: a waveguide feed port; 108: a waveguide antenna; 1082: a waveguide port; 1084: a sub-region; 110: a reflection plate; 1102: a substrate; 1104: a diffuse reflection section; 1122: a boss; 1124: a recessed portion;

200: cooking device: 202: a housing.

Detailed Description

In order that the above-recited objects, features and advantages of embodiments of the present application can be more clearly understood, a further detailed description of embodiments of the present application will be rendered by reference to the appended drawings and detailed description thereof. It should be noted that, without conflict, the embodiments of the present application and 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 application, but embodiments of the application may be practiced otherwise than as described herein, and therefore the scope of the application is not limited to the specific embodiments disclosed below.

Some embodiments according to the present invention are described below with reference to fig. 1 to 14.

As shown in fig. 1 and 2, a microwave generating assembly 100 according to this embodiment includes a box 102, a magnetron 104, a waveguide 106, a waveguide antenna 108, and a waveguide feed port 1062, where the box 102 is a main structure of the whole microwave oven, and accommodates and protects the waveguide 106, the waveguide feed port 1062, the magnetron 104, and other components disposed inside the box 102. Wherein the magnetron 104 is used to generate microwave energy. The magnetron 104 is at least partially disposed outside the housing 102 and is connected to a waveguide feed 1062 via a waveguide 106, the waveguide 106 being adapted to transmit microwave energy from the magnetron 104. Waveguide feed 1062 feeds microwave energy transmitted by waveguide 106 into the interior of enclosure 102 via waveguide antenna 108. By providing the waveguide antenna 108 on the waveguide feed port 1062 and providing the waveguide antenna 108 with a plurality of waveguide ports 1082, microwave energy can be uniformly distributed within the cavity through the plurality of waveguide ports 1082 under the influence of the waveguide antenna 108. Wherein, as shown in fig. 7, since the waveguide antenna 108 is divided into a plurality of sub-areas 1084 disposed around the geometric center, and a part or an integer number of waveguide ports 1082 are disposed in each sub-area 1084, the distribution of microwave energy is further realized.

In a particular embodiment, the plurality of waveguide ports 1082 are uniformly disposed about the geometric center of the waveguide feed port 1062, and uniform distribution of microwave energy is achieved by the uniform arrangement of the plurality of waveguide ports 1082.

In a specific embodiment, as shown in FIG. 3, the initial width L1 of the waveguide 106 is 80mm and then tapers to L2, specifically 173mm, after reaching the top of the cavity.

It should be emphasized that by the design of the waveguide antenna 108 and the plurality of waveguide ports 1082 provided at the top, the bottom stirring system and the antenna structure are eliminated, and the bottom space of the cavity is released, so that the overall volumetric efficiency is significantly improved, the internal structure is simplified, the number of components is reduced, and the production cost is reduced. Meanwhile, microwave energy can be uniformly distributed in the cavity, so that food can be uniformly heated.

The specific shapes of the waveguide antenna 108 and the waveguide port 1082 may be as shown in fig. 7, 8, 9, 10 and 11, and of course, the present application is not limited to the specific shapes, and the above shapes are merely examples.

Since the waveguide antenna 108 arranged at the top of the box 102 is provided with the plurality of uniformly arranged waveguide ports 1082, when food is placed on the inner partition plate of the box 102, microwaves can be respectively radiated through the waveguide ports 1082 at different positions, so that the microwaves can be ensured to be heated to the food at the left side and the right side of the inner partition plate at the same time, and further, the energy distribution can be changed by adjusting the positions of the different feed ports, so that the effect of uniform cooking can be achieved.

In some embodiments, the width of the waveguide port 1082 is optionally limited in value, and the microwave generated by the magnetron 104 is at the first wavelength λ _g when fed into the waveguide 106 to ensure matching with the waveguide 106 and the waveguide feed port 1062. By limiting the width of the waveguide port 1082 to half the first wavelength, i.e., the width of the waveguide port to lambda _g/2, unnecessary reflection and energy loss of microwaves during transmission does not occur, thereby ensuring efficient transmission and uniform distribution of microwave energy.

Further, the width of the waveguide port 1082 is greater than or equal to 10mm.

In some embodiments, alternatively, the waveguide port 1082 may be rectangular in shape, and the rectangular through holes may provide stable microwave radiation, facilitating uniform distribution of microwave energy. Wherein the size of the rectangular through holes needs to be precisely designed according to the wavelength and the desired microwave energy distribution to avoid energy loss and to ensure uniform heating.

In a particular embodiment, the waveguide port 1082 may be arcuate in shape, with the arcuate through holes providing a different microwave radiation pattern than rectangular through holes, creating a more complex microwave field distribution, and the arcuate through holes helping to improve the propagation path of microwave energy within the cavity, helping to reduce hot and cold spots, and further improving heating uniformity. Of course, the design of the arc-shaped through holes needs to consider the reflection and refraction characteristics of microwaves to optimize the propagation efficiency of microwaves in the cavity.

Wherein different shaped wave ports 1082 may provide different microwave radiation modes, helping to optimize the distribution of the microwave field.

In another particular embodiment, the plurality of waveguide ports 1082 are axisymmetrically arranged to facilitate uniform distribution of microwave energy within the cavity, reducing hot and cold spots during heating, and thereby achieving uniform heating of the food. By an axisymmetric waveguide port 1082 arrangement, a more uniform and optimized microwave field can be created, thereby improving heating efficiency.

In a specific embodiment, the plurality of waveguide ports 1082 are optionally arranged centrally and symmetrically to facilitate uniform distribution of microwave energy within the cavity, and to reduce hot and cold spots during heating, thereby achieving uniform heating of the food. By a centrally symmetric waveguide port 1082 arrangement, a more uniform and optimized microwave field can be created, thereby improving heating efficiency.

By using the waveguide feed 1062 as an entry point for microwave energy into the cavity for the overall system, the location and design of the waveguide feed 1062 is critical to the performance of the overall system. The waveguide antenna 108 connects the waveguide feed 1062 and the magnetron 104 to transmit microwave energy to the housing 102. By a centrally symmetric waveguide port 1082 layout, a more uniform and optimized microwave field can be created.

It can be appreciated that by providing the waveguide 1082 centrally symmetrically, not only is heating efficiency and food quality improved, but also the design and tuning process of the microwave cooking system is simplified. By precisely controlling the number, shape, size and layout of the waveguide ports 1082, the performance and user experience of the microwave oven can be significantly improved.

In a specific embodiment, a reflective plate 110 is optionally disposed within the housing 102 and on the wall opposite the waveguide feed 1062, thereby further optimizing the distribution and reflection of microwave energy. The reflection plate 110 may reflect microwave energy, so that the microwaves are reflected inside the case 102 for a plurality of times, thereby improving the utilization rate of the microwave energy. The reflection plate 110 helps to change the propagation path of microwaves in the cavity, reduce energy loss, and improve heating efficiency and uniformity. By the design of the reflecting plate 110, the dead zone of the microwaves in the cavity can be reduced, and the microwave energy can be ensured to cover every corner of the cavity.

Wherein a reflective plate 110 is disposed within the housing 102 opposite the waveguide feed 1062 for reflecting microwave energy. A waveguide feed 1062 is provided on a wall of the housing 102 for transmitting microwave energy to the cavity. The reflective plate 110 and the waveguide feed 1062 are disposed on opposite walls of the housing 102, respectively, to facilitate uniform distribution of microwave energy.

It should be added that the reflective plate 110 may be selected to have a specular reflection surface as shown in fig. 13, or may be selected to have a diffuse reflection surface as shown in fig. 14.

Further, the material of the reflection plate 110 is required to have good microwave reflection performance, and also factors such as high temperature resistance and corrosion resistance are considered. The size and shape of the reflective plate 110 need to be designed according to the size and shape of the cavity to ensure efficient reflection and distribution of microwave energy. By adjusting the position of the reflective plate 110, the distribution of microwave energy within the cavity can be further controlled, enabling finer heating control.

Wherein, under the action of the reflecting plate 110, the propagation path of microwave energy in the cavity is optimized by reflecting the microwave energy, and the energy loss and the heating dead zone are reduced, thereby improving the heating efficiency and uniformity.

Of course, by precisely controlling the number, position, size and shape of the reflection plates 110, the performance and user experience of the microwave oven can be further improved.

In a specific embodiment, optionally, diffuse reflection as shown in fig. 14 may be implemented, and the specific structure is as shown in fig. 4, where the reflective plate 110 includes a substrate 1102 and a diffuse reflection portion 1104, further optimizing the distribution and reflection of microwave energy. The diffuse reflection portion 1104 can make microwave energy more uniformly distributed in the cavity, reduce hot spots and cold spots, and improve heating efficiency. In addition, the diffuse reflection portion 1104 helps to improve the propagation path of microwave energy within the cavity, reduce energy loss, and improve heating uniformity. By the design of the diffuse reflection part 1104, food can be ensured to be heated more uniformly in the microwave oven cavity, so that the cooking experience of a user is improved.

The substrate 1102, which is the main structure of the reflection plate 110, is generally made of a material having good microwave reflection performance. The side of the substrate 1102 facing the waveguide feed 1062 is provided with a diffuse reflection portion 1104 for optimizing the distribution of microwave energy.

By optimizing the propagation path of microwave energy within the cavity, the energy distribution and heating uniformity is improved by the diffuse reflection portion 1104. By precisely controlling the number, position, size and shape of the diffuse reflection portions 1104, the performance and user experience of the microwave oven can be further improved.

In a specific embodiment, optionally, as shown in fig. 5 and 6, the diffuse reflection portion 1104 includes at least one of a protruding portion 1122 and a recessed portion 1124, and the microwaves are reflected when they are transmitted to the protruding portion 1122, and the microwaves are diffusely reflected due to the non-parallelism between the surface of the protruding portion 1122 and the substrate 1102, and similarly, the microwaves are diffusely reflected when they are transmitted to the recessed portion 1124 for the recessed portion 1124. The non-parallel design of the surfaces of the protrusions 1122 and recesses 1124 may allow for a more uniform distribution of microwave energy within the cavity under the influence of at least one of the protrusions 1122 and recesses 1124.

The specific shape of the protruding portion 1122 and the recessed portion 1124 is not limited as long as the surface thereof is not non-parallel to the substrate 1102.

In some embodiments, the reflector plate 110 and waveguide feed 1062 may optionally be provided on different walls of the enclosure 102 to optimize the distribution and reflection of microwave energy. Specifically, the reflection plate 110 and the waveguide feed port 1062 may be disposed on the top wall and the bottom wall of the case 102, respectively, or may be disposed on the left side wall and the right side wall of the case 102, respectively, and by adjusting the positions of the reflection plate 110 and the waveguide feed port 1062, the propagation path of microwave energy in the cavity may be improved, the energy loss may be reduced, and the heating efficiency may be improved.

Of course, the different arrangements of the baffle 110 and waveguide feed 1062 help to improve the uniformity of microwave energy within the cavity and thus the heating uniformity.

Wherein by different layouts of the reflecting plate 110 and the waveguide feed 1062, the propagation path of microwave energy within the cavity can be optimized, improving energy distribution and heating uniformity. Further, the number, position, size and shape of the reflection plate 110 and the waveguide feed port 1062 can be precisely controlled, thereby improving the performance and user experience of the microwave oven.

Another embodiment of the cooking apparatus 200 is provided by the present application, as shown in fig. 12, the cooking apparatus 200 includes a housing 202 and a microwave generating assembly 100, the housing 202 being an outer shell of a microwave oven, typically made of metal, to protect a user from microwave radiation, and a structure to house the internal components. Since the cooking apparatus 200 includes any one of the above-mentioned microwave generating assemblies 100, the cooking apparatus has the beneficial effects of any one of the above-mentioned microwave generating assemblies 100, and will not be described herein.

The cooking device 200 is a microwave oven, a micro steaming and baking integrated machine, and the like.

In a specific embodiment, a brand new multi-feed waveguide and a microwave oven thereof are provided, which are used for a microwave cooking system, can effectively solve the requirement of uniformly cooking food, improve the whole volume rate and solve the problem of lower volume rate of the traditional flat microwave oven. The embodiment creatively uses the top slot waveguide antenna structure on the basis of the existing flat microwave oven structure, thereby eliminating the bottom stirring motor and the antenna structure and reducing the bottom space of the cavity by more than 50 percent. The method comprises the following steps that on the original cavity structure, firstly, a waveguide tube is arranged at the top, the initial width is 80mm, then the waveguide tube gradually changes to 173mm after reaching the top of the cavity, secondly, a large feed port sheet (namely a microwave antenna) is arranged below the waveguide tube at the top, and three gap openings (namely waveguide ports) with different sizes are arranged on the feed port sheet, so that microwave energy is radiated into the cavity to heat food; the size and the length of the gap opening are lambda _g/2, the width is generally more than 10mm, and the main purpose is to prevent the microwave ignition breakdown from happening when the gap is too small. The biggest advantage of this scheme lies in its a plurality of gap radiation mouths, evenly arranges around the center, and when food was placed on the inner partition board, the gap mouth through different positions was able to radiate the microwave respectively to guarantee that the microwave can heat the food to the inner partition board left and right sides simultaneously, and through adjusting the position change energy distribution of different feed mouths, can reach the effect of even cooking. Furthermore, the scheme innovatively introduces the bottom diamond surface and the diffuse reflection structure, so that the microwave transmission path can be effectively changed, and the effect of uniform heating is realized.

Wherein, λ _g is specifically the wavelength in the waveguide, that is, the first wavelength, and the conversion relationship between the wavelength in the waveguide and the free space wavelength is shown in the following formula:

Wherein, lambda _o: wavelength in air, lambda _g: wavelength in waveguide, W: the waveguide inner width is also the width of the waveguide feed port.

The beneficial effects of this embodiment are as follows: through introducing a many mouthfuls antenna structure, can reduce the space that cavity bottom mixing system occupy, can improve the complete machine volume rate by a wide margin, realized simultaneously that the cost reduces, this scheme has set up waveguide gap mouth structure in a plurality of positions at cavity top, can adjust different mouthfuls of power distribution, reduce the cavity bottom and be close to the regional microwave distribution blind area in both sides, realize even heating effect, thereby improve user experience effect, in addition, this scheme has increased diamond diffuse reflection structure in the cavity bottom, microwave transmission direction has been changed, thereby improve complete machine heating homogeneity level.

According to the microwave generating assembly provided by the invention, the plurality of waveguide ports are uniformly arranged around the geometric center of the waveguide feed port, so that the uniform distribution of microwave energy is realized through the uniform arrangement of the plurality of waveguide ports.

In the present invention, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more, unless expressly 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 invention, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "left", "right", "front", "rear", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or units referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present invention.

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 is only a preferred embodiment 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

1. A microwave generating assembly, comprising:

A case;

a magnetron at least partially disposed outside the housing;

the waveguide feed port is arranged on the wall surface of the box body and is provided with a waveguide antenna;

one end of the waveguide tube is connected with the magnetron, the other end of the waveguide tube is connected with the waveguide feed port, microwaves emitted by the magnetron are fed into the box body through the waveguide tube and the waveguide antenna;

the waveguide antenna comprises a plurality of sub-areas which are arranged around the geometric center of the waveguide feed port, and at least part of waveguide ports are arranged in each sub-area.

2. The microwave generating assembly of claim 1, wherein the microwave fed into the waveguide by the magnetron has a wavelength of a first wavelength lambda _g,

Wherein the width of the waveguide port is lambda _g/2.

3. A microwave generating assembly in accordance with claim 2, wherein the shape of the waveguide aperture comprises a rectangular through-hole and/or an arcuate through-hole.

4. A microwave generating assembly in accordance with claim 1, wherein a plurality of the waveguide ports are disposed axisymmetrically about an axis of symmetry passing through a geometric center of the waveguide feed port.

5. The microwave generating assembly of claim 1, wherein a plurality of the waveguide ports are disposed centrally symmetrically about a geometric center of the waveguide feed port.

6. The microwave generating assembly of any one of claims 1 to 5, further comprising:

The reflecting plate is arranged in the box body, and the reflecting plate and the waveguide feed port are arranged on two opposite wall surfaces in the box body.

7. The microwave generating assembly of claim 6, wherein the reflective plate comprises:

and one side of the substrate facing the waveguide feed port is provided with a diffuse reflection part.

8. The microwave-generating assembly of claim 7, wherein the diffuse reflecting portion comprises:

a protruding portion, a surface of the protruding portion being non-parallel to the substrate; and/or

And the surface of the concave part is not parallel to the substrate.

9. The microwave-generating assembly of claim 6, wherein the microwave-generating assembly comprises,

The reflecting plate and the waveguide feed port are arranged on the top wall and the bottom wall of the box body; or (b)

The reflecting plate and the waveguide feed port are arranged on the left side wall and the right side wall of the box body.

10. A cooking apparatus, comprising:

A housing;

A microwave generating assembly according to any one of claims 1 to 9, provided within the housing.