A cooking assembly and microwave oven

Abstract

The application provides a cooking assembly and a microwave oven. The cooking assembly is applied to the microwave oven. The cooking assembly has a cooking cavity. A cavity bottom wall of the cooking cavity is formed with a plurality of first microwave feed openings. The cooking assembly comprises a microwave generator and a waveguide channel. The microwave generator is used to generate microwaves. The waveguide channel is used to conduct the microwaves generated by the microwave generator to the cooking cavity through the plurality of first microwave feed openings. The waveguide channel comprises a plurality of standing waves arranged along the propagation direction of the microwaves. The cavity bottom wall is equally divided into a plurality of sub-zones along the propagation direction of the microwaves. The number of the sub-zones is the same as the number of the standing waves. At least one first microwave feed opening is arranged in each sub-zone. The center of each sub-zone is taken as the origin of the corresponding four quadrants. The first microwave feed openings of two adjacent sub-zones are arranged in pairs. The absolute value of the difference between the number of the quadrants in the sub-zone where the same pair of the first microwave feed openings is arranged is 2. The cooking assembly and the microwave oven provided by the application can improve the radiation efficiency.

Description

Technical Field

[0001] This application relates to the field of microwave technology, and more particularly to a cooking component and a microwave oven. Background Technology

[0002] Microwave ovens use microwaves to heat the food inside. Multiple standing wave electric fields are distributed within the waveguide, and each electric field corresponds to a microwave feed port. When microwaves from a waveguide with multiple distributed electric fields are conducted through multiple microwave feed ports, the overall microwave radiation efficiency can easily decrease. Utility Model Content

[0003] In view of this, embodiments of this application aim to provide a cooking component that can reduce radiation and improve efficiency.

[0004] To achieve the above objectives, the technical solution of this application embodiment is implemented as follows:

[0005] One embodiment of this application discloses a cooking assembly for use in a microwave oven. The cooking assembly has a cooking cavity, the cavity wall of which is formed with a plurality of first microwave feed ports. The cooking assembly includes:

[0006] A microwave generator is used to produce microwaves;

[0007] A waveguide channel is used to conduct microwaves generated by the microwave generator to the cooking cavity through the first microwave feed port. Multiple distributed electric fields are formed in the waveguide channel along the propagation direction of the microwaves. Each distributed electric field corresponds to at least one first microwave feed port. Among the first microwave feed ports corresponding to two adjacent distributed electric fields, those that are offset in opposite directions to the propagation direction of the microwaves form a group. The first microwave feed ports in the same group are used to cut currents flowing in the same direction.

[0008] The cooking component provided in this application, by setting up a waveguide channel and a microwave generator, allows microwaves to be conducted to the cooking cavity through a first microwave feed port to heat the food inside the cooking cavity. Multiple distributed electric fields are formed within the waveguide channel, arranged along the microwave propagation direction. Each distributed electric field corresponds to at least one first microwave feed port. By grouping the first microwave feed ports corresponding to two adjacent distributed electric fields that are biased in opposite directions to the microwave propagation direction, the first microwave feed ports in the same group can cut currents flowing in the same direction. This creates a superposition enhancement effect, thereby improving the overall radiation efficiency, reducing the occurrence of phase reversal leading to radiation cancellation, and increasing the overall radiation energy.

[0009] Another embodiment of this application discloses a cooking assembly for use in a microwave oven. The cooking assembly has a cooking cavity, and the bottom wall of the cooking cavity has a plurality of first microwave feed ports. The cooking assembly includes:

[0010] A microwave generator is used to produce microwaves;

[0011] A waveguide channel is used to conduct microwaves generated by the microwave generator to the cooking cavity through the plurality of first microwave feed ports. The waveguide channel includes a plurality of standing waves arranged along the microwave propagation direction. The bottom wall of the cavity is divided into a plurality of sub-regions along the microwave propagation direction, and the number of sub-regions is the same as the number of standing waves. Each sub-region is provided with at least one first microwave feed port. The center of each sub-region is taken as the origin of the corresponding four quadrants. The first microwave feed ports of two adjacent sub-regions are arranged in pairs. The absolute value of the difference in the number of quadrants in the sub-region of the same pair of first microwave feed ports is 2.

[0012] The cooking assembly disclosed in this application, by setting a waveguide channel and a microwave generator, allows microwaves to be conducted to the cooking cavity through a first microwave feed port to heat the food inside the cooking cavity. The waveguide channel includes multiple standing waves arranged along the microwave propagation direction. The bottom wall of the cavity is divided into multiple sub-regions along the microwave propagation direction. By setting the absolute value of the difference in quadrant numbers in the sub-regions where the same pair of first microwave feed ports are located, the same pair of first microwave feed ports can cut currents flowing in the same direction. In this way, currents flowing in the same direction in two adjacent sub-regions are cut by corresponding first microwave feed ports to form a superposition enhancement effect, thereby improving the overall radiation efficiency, reducing the situation where phase reversal causes radiation cancellation, and increasing the overall radiation energy.

[0013] In one embodiment, at least one of the plurality of first microwave feed ports is an arc-shaped port.

[0014] In one embodiment, the length of the arc-shaped opening is between 45mm and 90mm.

[0015] In one embodiment, at least two of the plurality of first microwave feed ports have different length dimensions.

[0016] In one embodiment, the same pair of first microwave feed ports are parallel and intersect the propagation direction of the microwave.

[0017] In one embodiment, each sub-region is provided with a plurality of first microwave feed ports, and at least two of the plurality of first microwave feed ports intersect in the length direction.

[0018] In one embodiment, the cooking assembly includes a cavity sidewall, a cavity top wall, and a cavity bottom wall. The cooking cavity is located within the space formed by the cavity sidewall, the cavity top wall, and the cavity bottom wall. The cavity sidewall has a second microwave feed port. The waveguide channel is used to conduct microwaves generated by the microwave generator to the cooking cavity at least through the second microwave feed port.

[0019] In one embodiment, the second microwave feed port is configured to have at least one vertices of a virtual rectangle removed.

[0020] In one embodiment, at least four of the plurality of first microwave feed ports are distributed in a rotationally symmetrical manner at the four corners of the cavity bottom wall with respect to the center of the cavity bottom wall.

[0021] In one embodiment, there are two sub-regions, namely a first sub-region and a second sub-region. The first sub-region and the second sub-region are respectively provided at two corners of the cavity bottom wall. The first sub-region is located upstream along the propagation direction of the microwave, and the second sub-region is located downstream along the propagation direction of the microwave. At least one of the plurality of second microwave feed ports is an adjustable feed port, and the adjustable feed port is provided in the second sub-region.

[0022] In one embodiment, the cavity sidewall forms a second microwave feed port, and the shape of the first microwave feed port is formed by removing the two apex corners of the top side of the virtual rectangle;

[0023] The cavity bottom wall has five first microwave feed ports, four of which are arc-shaped, and two of which are perpendicular in length and are respectively located in the first, third, and fourth quadrants of the first sub-region. The remaining two of the first microwave feed ports are perpendicular in length and are respectively located in the first, second, and third quadrants of the second sub-region. The remaining one of the five second microwave feed ports is the adjustment feed port, which is a semi-circular opening and is located in the second sub-region.

[0024] In one embodiment, the radius of the adjustable feed port is between 18 mm and 24 mm.

[0025] In one embodiment, the cooking assembly includes a waveguide shell assembly located outside the cooking cavity, the waveguide shell assembly and the cavity wall of the cooking cavity forming the waveguide channel.

[0026] In one embodiment, the cooking assembly includes a waveguide shell assembly and a waveguide cover assembly, both of which are located outside the cooking cavity, and the waveguide shell assembly and the waveguide cover assembly enclose the waveguide channel;

[0027] The waveguide cover assembly has a first port and a second port, the first port being connected to the first microwave feed port and the second port being connected to the second microwave feed port.

[0028] In one embodiment, the waveguide shell assembly includes a first shell and a second shell, the first shell being connected to the second shell, the first shell extending along the vertical direction of the microwave oven, and the second shell extending along a first direction, wherein the first direction intersects the top and bottom directions.

[0029] In another aspect, this application discloses a microwave oven that includes the cooking components described in any of the foregoing embodiments. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the structure of a microwave oven provided in an embodiment of this application;

[0031] Figure 2 for Figure 1 A schematic diagram of the cooking components in the diagram;

[0032] Figure 3 for Figure 2 A structural diagram from another perspective;

[0033] Figure 4 This is a schematic diagram of the structure of the first microwave feed port;

[0034] Figure 5 The diagram shows the distribution of two adjacent electric fields and their first and second feed ports, where the arrows indicate the propagation direction of the microwaves.

[0035] Figure 6 This is a schematic diagram of the first microwave feed port with six different distribution methods, where the arrows indicate the direction of microwave propagation;

[0036] Figure 7 This is a schematic diagram of the induced current distribution and microwave feed port, where the arrows indicate the direction of current flow.

[0037] Explanation of reference numerals in the attached figures

[0038] 1000, Microwave oven; 100, Cooking assembly; 1, Microwave generator; 11, Magnetron; 12, Bracket; 13, Antenna cap; 2, Waveguide shell assembly; 21, First shell; 22, Second shell; 31, Cavity bottom wall; 31a, First microwave feed port; 32a1, First feed port; 32a2, Second feed port; 311, Sub-region; 3111, First sub-region; 3112, Second sub-region; 32, Cavity side wall; 32a, Second microwave feed port; 32c, Adjustable feed port; 200, Cabinet; 200a, Cooking cavity; 200c, Loading / unloading port; A, Distributed electric field. Detailed Implementation

[0039] It should be noted that, unless otherwise specified, the embodiments and technical features in the embodiments of this application can be combined with each other, and the detailed descriptions in the specific implementation should be understood as explanations of the purpose of this application and should not be regarded as undue limitations on this application.

[0040] The present application will now be described in further detail with reference to the accompanying drawings and specific embodiments. The terms "first," "second," etc., used in the embodiments of this application are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly including at least one feature. In the description of the embodiments of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0041] To better understand the cooking component 100 provided in this application, the microwave oven 1000 will be described first.

[0042] One embodiment of this application provides a microwave oven 1000, please refer to... Figure 1 The microwave oven 1000 includes the cooking component 100 in any of the following embodiments.

[0043] For example, microwave oven 1000 may be a device with functions such as microwave steaming, microwave baking, or microwave steam baking.

[0044] Another embodiment of this application provides a cooking component 100 applied to a microwave oven 1000. Please refer to [link / reference]. Figures 1 to 7 The cooking assembly 100 has a cooking cavity 200a, the cavity wall of which is formed with a plurality of first microwave feed ports 31a. The cooking assembly 100 includes a microwave generator 1 for generating microwaves. A waveguide channel is used to conduct the microwaves generated by the microwave generator 1 to the cooking cavity 200a through the first microwave feed ports 31a. A plurality of distributed electric fields A are formed in the waveguide channel along the propagation direction of the microwaves. Each distributed electric field A corresponds to at least one first microwave feed port 31a. Among the first microwave feed ports 31a corresponding to two adjacent distributed electric fields A, those that are biased in opposite directions to the propagation direction of the microwaves form a group. The first microwave feed ports 31a in the same group are used to cut currents flowing in the same direction.

[0045] A waveguide channel is a channel that can transmit microwaves.

[0046] For example, the number of distributed electric fields can be two or more.

[0047] It should be noted that the phases of two adjacent distributed electric fields are opposite.

[0048] It should be noted that the microwaves corresponding to the distributed electric field A will generate an induced current when flowing through the cavity wall; please refer to [reference needed]. Figure 7The induced current generated by one of the two adjacent distributed electric fields A radiates outward from the center, while the induced current generated by the other of the two adjacent distributed electric fields A converges from the outside to the center.

[0049] It should be noted that the number of distributed electric fields A is related to the size of the cavity wall of the cooking cavity 200a along the microwave propagation direction. The number of distributed electric fields A is n = 2L / λ0, where L is the size of the cavity wall of the cooking cavity along the microwave propagation direction, λ0 is the free space wavelength corresponding to the operating frequency of the microwave generator 1, and λ0 = c / f0, where c is the speed of light and f0 is the operating frequency.

[0050] Each distributed electric field corresponds to at least one first microwave feed port 31a, meaning that the first microwave feed port 31a is provided on the projection area of ​​the distributed electric field on the cavity wall of the cooking cavity 200a along the direction perpendicular to the distributed electric field. In other words, the corresponding first microwave feed port 31a is located within the projection area of ​​the distributed electric field along the projection area perpendicular to the distributed electric field.

[0051] The opposite offset from the propagation direction of microwaves means that the propagation direction of microwaves is the line connecting the centers of two adjacent distributed electric fields, which is called the first line. The boundary line between the two adjacent distributed electric fields is called the second line. The first line and the second line divide the cavity wall of the cooking cavity 200a corresponding to the two adjacent distributed electric fields into four regions. The first microwave feed ports 31a corresponding to the two adjacent distributed electric fields are arranged diagonally parallel, and both are offset from the first line and their length direction intersects the first line.

[0052] The cooking component 100 provided in this application, by setting a waveguide channel and a microwave generator 1, allows microwaves to be conducted to the cooking cavity 200a through a first microwave feed port 31a to heat the food in the cooking cavity 200a. Multiple distributed electric fields A are formed within the waveguide channel, arranged along the microwave propagation direction. Each distributed electric field A corresponds to at least one first microwave feed port 31a. By grouping the first microwave feed ports 31as corresponding to two adjacent distributed electric fields A that are offset in opposite directions from the microwave propagation direction, the first microwave feed ports 31as in the same group can cut currents flowing in the same direction. This creates a superposition enhancement effect, thereby improving the overall radiation efficiency, reducing the occurrence of phase reversal leading to radiation cancellation, and increasing the overall radiation energy.

[0053] This application provides a cooking assembly 100 for use in a microwave oven 1000. The cooking assembly 100 has a cooking cavity 200a, and the bottom wall 31 of the cooking cavity 200a has a plurality of first microwave feed ports 31a. The cooking assembly 100 includes a microwave generator 1 and a waveguide channel. The microwave generator 1 is used to generate microwaves. The waveguide channel is used to conduct the microwaves generated by the microwave generator 1 to the cooking cavity 200a through the plurality of first microwave feed ports 31a. The waveguide channel includes a plurality of standing waves arranged along the microwave propagation direction. The bottom wall 31 of the cavity is divided into a plurality of sub-regions 311 along the microwave propagation direction, and the number of sub-regions 311 is the same as the number of standing waves. Each sub-region 311 is provided with at least one first microwave feed port 31a. The center of each sub-region 311 is taken as the origin of the corresponding four quadrants. The first microwave feed ports 31a of two adjacent sub-regions 311 are arranged in pairs, wherein the absolute value of the difference in the number of quadrants in the sub-region 311 where the same pair of first microwave feed ports 31a is located is 2.

[0054] The absolute value of the difference in the number of quadrants in the sub-region 311 where the same pair of first microwave feed ports 31a are located is 2, which means that if one of the same pair of first microwave feed ports 31a is set in the first quadrant of the corresponding four quadrant, then the other of the same pair of first microwave feed ports 31a is set in the third quadrant of the corresponding four quadrant; similarly, if one of the same pair of first microwave feed ports 31a is set in the second quadrant of the corresponding four quadrant, then the other of the same pair of first microwave feed ports 31a is set in the fourth quadrant of the corresponding four quadrant.

[0055] For example, if the first microwave feed port 31a may occupy the first quadrant and the second quadrant, then the other corresponding to the same pair may occupy the third quadrant and the fourth quadrant.

[0056] For example, the number of standing waves can be two or more.

[0057] For example, the number of sub-regions 311 can be two or more.

[0058] The cooking component 100 provided in this application, by setting a waveguide channel and a microwave generator 1, allows microwaves to be conducted to the cooking cavity 200a through a first microwave feed port 31a to heat the food in the cooking cavity 200a. The waveguide channel includes multiple standing waves arranged along the microwave propagation direction. The cavity bottom wall 31 is divided into multiple sub-regions 311 along the microwave propagation direction. By setting the absolute value of the difference in the number of quadrants in the sub-regions 311 where the same pair of first microwave feed ports 31a are located to 2, the same pair of first microwave feed ports 31a can cut currents flowing in the same direction. In this way, the currents flowing in the same direction in two adjacent sub-regions 311 are all cut by the corresponding first microwave feed ports 31a to form a superposition enhancement effect, thereby improving the overall radiation efficiency, reducing the situation of radiation cancellation due to phase reversal, and improving the overall radiation energy.

[0059] The cooking equipment provided in this application, based on the advantages of the cooking component 100, enables the microwave oven 1000 to have the characteristics of good heating uniformity and high radiation efficiency.

[0060] It should be noted that the first direction can be the left or right direction of the microwave oven 1000.

[0061] For example, Figure 1 R1 can be the vertical direction of microwave oven 1000, R2 can be the horizontal direction of microwave oven 1000, and R3 can be the front-back direction of microwave oven 1000.

[0062] In one embodiment, the same pair of first microwave feed ports 31a are parallel and intersect the direction of microwave propagation.

[0063] This allows for better cutting of currents flowing in the same direction, further improving radiation efficiency.

[0064] In one embodiment, at least two of the plurality of first microwave feed ports 31a have different length dimensions L3.

[0065] It should be noted that, as Figure 3 As shown, the length dimension L3 refers to the extension length of the centerline between the two edges of the first microwave feed port 31a along its extension direction.

[0066] It should be noted that when the microwave oven 1000 is operating in a hot state, the hot frequency of its microwave generator 1 changes randomly. Based on the microwave frequency cutoff wavelength theory, the bottom microwave field can be dynamically controlled. The waveguide gap length and microwave frequency satisfy the following formula:

[0067]

[0068] Where, λ c f is the cutoff wavelength. c Where c is the cutoff frequency, m and n represent the number of times the electric field changes during the first half of the waveguide's wide and narrow sides, a is the dimension of the wide side (length), and b is the dimension of the narrow side (width).

[0069] In other words, only microwaves with a frequency greater than or equal to f c Only microwaves of that frequency can pass through at that time; microwaves of other frequencies are blocked and cannot pass through. It should be noted that the electromagnetic wave propagation in the waveguide is a rectangular waveguide, and the dominant wave of the rectangular waveguide is TE. 10 The mode, i.e., the variation period of the short side, is 0. Therefore, by setting the first microwave feed port 31a with different length dimensions L3, the frequency of the microwave can be selected.

[0070] In one embodiment, please refer to Figure 3 and Figure 6 At least one of the multiple first microwave feed ports 31a is an arc-shaped port.

[0071] It is understandable that an arc-shaped opening refers to an opening whose surrounding edge has at least one curved edge.

[0072] For example, there can be four first microwave feed ports 31a, and all four first microwave feed ports 31a can be arc-shaped ports. Figure 4 As shown, L1 = R × α, L2 = 2 × R × sin(α / 2). When the length L3 of the first microwave feed port 31a is designed to be 60 mm to meet the radiation requirements, and α can be 90°, then R can be calculated to be approximately 38.2 mm. The length of the arc-shaped port, as shown in the front-back direction of the microwave oven 1000, occupies 54 mm of the cavity bottom wall 31. Compared with the rectangular port, the length of the arc-shaped port can be reduced by about 10%.

[0073] In this way, while meeting radiation requirements, its size can be shortened in another direction, which is beneficial for arranging more first microwave feed ports 31a in that direction and increasing the degree of design freedom.

[0074] In one embodiment, the length L3 of the arc-shaped opening is between 45 mm and 90 mm.

[0075] For example, the length L3 of the arc-shaped opening can be 45mm, 50mm, 55mm, 60mm, 65mm, 70mm, 75mm, 80mm, 85mm, or 90mm, etc. For instance, when the length L3 is no greater than 55mm, it can be used to pass microwaves with frequencies above 24.66GHz; when the length L3 is between 55mm and 65mm, it can be used to pass microwaves with frequencies above 24.33GHz; and when the length L3 is no less than 65mm, it can be used to pass microwaves with frequencies above 2.4GHz.

[0076] Here, by setting an appropriate length dimension L3, microwaves above different cutoff frequencies can be selected to pass through, thereby achieving dynamic control, reducing the distribution blind zone in the corner area of ​​the cooking cavity 200a, and improving the uniformity of heating.

[0077] In one embodiment, each sub-region 311 is provided with a plurality of first microwave feed ports 31a, and at least two of the plurality of first microwave feed ports 31a intersect in the length direction.

[0078] For example, at least two of the plurality of first microwave feed ports 31a are first feed port 32a1 and second feed port 32a2. The length directions of the first feed port 32a1 and the second feed port 32a2 are not coincident, and there is an angle between them. Specifically, the length direction of the first feed port 32a1 is perpendicular to the length direction of the second feed port 32a2. In this way, the mutual coupling between the two can be reduced to a certain extent, thereby increasing the radiation energy.

[0079] In one embodiment, the cooking assembly 100 includes a cavity sidewall 32, a cavity top wall, and a cavity bottom wall 31. The cooking cavity 200a is located within the space formed by the cavity sidewall 32, the cavity top wall, and the cavity bottom wall 31. The cavity sidewall 32 has a second microwave feed port 32a. The waveguide channel is used to conduct the microwaves generated by the microwave generator 1 to the cooking cavity 200a at least through the second microwave feed port 32a.

[0080] Here, by forming a second microwave feed port 32a on the cavity sidewall 32 and a first microwave feed port 31a on the cavity bottom wall 31, the opening direction of the first microwave feed port 31a is perpendicular to the opening direction of the second microwave feed port 32a. In this way, microwaves can be conducted from the first microwave feed port 31a and from the second microwave feed port 32a to the cooking cavity 200a. In this way, on the one hand, the microwaves can form a more complex electromagnetic field distribution in the cooking cavity 200a, thereby improving the uniformity of the electromagnetic field distribution, reducing the microwave distribution blind zone, and improving the uniformity of heating. On the other hand, it can reduce the situation of local energy being too strong or too weak due to uneven electromagnetic field to a certain extent, thereby improving the utilization rate of microwave energy and reducing energy loss. Furthermore, by setting a first microwave feed port 31a and a second microwave feed port 32a with perpendicular opening directions for microwave conduction in two directions, it is not necessary to install a device for adjusting the direction of microwaves, such as a stirring device. This not only reduces the space occupied by the cooking cavity 200a to a certain extent and increases the volume ratio of the cooking cavity 200a, but also reduces the maintenance cost of the cooking component 100 and simplifies the structure of the cooking component 100.

[0081] In one embodiment, the second microwave feed port 32a is configured to have at least one vertices of a virtual rectangle removed.

[0082] Here, the virtual rectangle is shaped by removing at least one apex corner to form a second microwave feed port 32a, similar to chamfering the virtual rectangle. This allows the apex corner to block components of the electric field in other directions, facilitating the formation of a component perpendicular to the electric field. When the trajectory of the electric field vector changes from 0° to 360°, a circularly polarized wave can be formed, thereby expanding the microwave coverage area and improving heating uniformity.

[0083] Circular polarization refers to the electric field moving in a circular motion following the direction of current flow.

[0084] In one embodiment, at least four of the plurality of first microwave feed ports 31a are distributed in a rotationally symmetrical manner at the four corners of the cavity bottom wall 31 with respect to the center of the cavity bottom wall 31.

[0085] Here, by providing first microwave feed ports 31a at the four corners of the bottom wall 31 of the cavity, on the one hand, the microwave distribution at the four corners of the bottom of the cooking cavity 200a can be improved, the microwave distribution blind zone can be reduced, and the heating uniformity can be further improved; on the other hand, the multiple first microwave feed ports 31a are distributed in rotational symmetry, which can generate in-phase microwave radiation to a certain extent and improve radiation efficiency.

[0086] In one embodiment, there are two sub-regions 311, namely a first sub-region 3111 and a second sub-region 3112. The first sub-region 3111 and the second sub-region 3112 are respectively provided at two corners of the cavity bottom wall 31. The first sub-region 3111 is located upstream along the microwave propagation direction, and the second sub-region 3112 is located downstream along the microwave propagation direction. At least one of the plurality of second microwave feed ports 32a is an adjustable feed port 32c, and the adjustable feed port 32c is provided in the second sub-region 3112.

[0087] For example, the propagation direction of microwaves below the cavity bottom wall 31 can be from right to left, the first sub-region 3111 can be located on the right side, the second sub-region 3112 can be located on the left side, and the first sub-region 3111 and the second sub-region 3112 are respectively provided at two corners of the cooking cavity 200a.

[0088] It should be noted that, along the propagation direction of the microwave, the microwave is first radiated at the first microwave feed port 31a of the first sub-region 3111 upstream, and then at the first microwave feed port 31a of the second sub-region 3112 downstream. This results in the energy coupled at the first sub-region 3111 being stronger than the energy coupled at the second sub-region 3112.

[0089] For example, there are two sub-regions 311, which means there are also two standing waves. In this way, the size of the waveguide channel corresponding to the bottom wall 31 of the cavity along the first direction can be set to 140mm, and the operating frequency of the microwave generator 1 can be set to 2.45GHz, so that there can be two standing waves.

[0090] In this way, by providing an adjustable feed port 32c in the second sub-region 3112, the intensity of the coupled energy in the downstream second sub-region 3112 can be increased, thereby improving the overall radiation uniformity of the first microwave feed port 31a of the cavity bottom wall 31 and resulting in good heating uniformity.

[0091] In one embodiment, the cavity sidewall 32 forms a second microwave feed port 32a, and the shape of the first microwave feed port 31a is formed by removing the two apex corners of the top side of the virtual rectangle. The cavity bottom wall 31 forms five first microwave feed ports 31a, four of which are arc-shaped, and two of which are perpendicular in length and are respectively located in the first quadrant, the third quadrant, and the fourth quadrant of the four quadrants corresponding to the first sub-region 3111. The remaining two of which are perpendicular in length and are respectively located in the first quadrant, the second quadrant, and the third quadrant of the four quadrants corresponding to the second sub-region 3112. The remaining one of the five second microwave feed ports 32a is an adjustment feed port 32c, which is a semi-circular opening and is located in the second sub-region 3112.

[0092] Here, by forming a second microwave feed port 32a on the cavity sidewall 32 and five first microwave feed ports 31a on the cavity bottom wall 31, the opening direction of the first microwave feed ports 31a is perpendicular to the opening direction of the second microwave feed ports 32a. In this way, microwaves can be conducted from the first microwave feed ports 31a and from the second microwave feed ports 32a to the cooking cavity 200a. In this way, on the one hand, the microwaves can form a more complex electromagnetic field distribution in the cooking cavity 200a, thereby improving the uniformity of the electromagnetic field distribution, reducing the microwave distribution blind zone, and improving the uniformity of heating. On the other hand, it can reduce the situation of local energy being too strong or too weak due to uneven electromagnetic field to a certain extent, thereby improving the utilization rate of microwave energy and reducing energy loss. Furthermore, by setting a first microwave feed port 31a and a second microwave feed port 32a with perpendicular opening directions for microwave conduction in two directions, it is not necessary to install a device for adjusting the direction of microwaves, such as a stirring device. This not only reduces the space occupied by the cooking cavity 200a to a certain extent and increases the volume ratio of the cooking cavity 200a, but also reduces the maintenance cost of the cooking component 100 and simplifies the structure of the cooking component 100.

[0093] The second microwave feed port 32a is shaped by removing the two apex corners of the top side of the virtual rectangle, which allows circularly polarized waves to be transmitted on the cavity sidewall 32. This further expands the microwave coverage and improves the uniformity of heating.

[0094] By setting the shape of four of the five first microwave feed ports 31a to arc shape, the design size can be shortened while meeting radiation requirements. This allows for the arrangement of more first microwave feed ports 31a on the cavity bottom wall 31, increasing the design freedom.

[0095] The number of first microwave feed ports 31a is five. Among the five first microwave feed ports 31a, two of the four first microwave feed ports 31a are located in the first, third, and fourth quadrants of the four quadrants corresponding to the first sub-region 3111. The remaining two of the four first microwave feed ports 31a are located in the first, second, and third quadrants of the four quadrants corresponding to the second sub-region 3112. In this way, on the one hand, the microwave distribution at the four corners of the bottom of the cooking cavity 200a can be improved, the microwave distribution blind zone can be reduced, and the heating uniformity can be further improved. On the other hand, the first microwave feed ports 31a in the first quadrant of the first sub-region 3111 and the first microwave feed ports 31a in the third quadrant of the second sub-region 3112 are grouped together to cut currents flowing in the same direction. The first microwave feed ports 31a in the fourth and third quadrants of the first sub-region 3111 and the first microwave feed ports 31a in the first and second quadrants of the second sub-region 3112 are grouped together to cut currents flowing in the same direction. In this way, the radiation efficiency can be improved.

[0096] The length directions of the two first microwave feed ports 31a corresponding to the first sub-region 3111 are perpendicular, and the length directions of the two first microwave feed ports 31a corresponding to the second sub-region 3112 are perpendicular. This reduces the mutual coupling effect between the two.

[0097] The remaining one of the five second microwave feed ports 32a is an adjustable feed port 32c. The adjustable feed port 32c is a semi-circular opening and is located in the second sub-region 3112. In this way, the intensity of the coupled energy at the downstream second sub-region 3112 can be improved, thereby improving the overall radiation uniformity of the first microwave feed port 31a on the cavity bottom wall 31 and resulting in good heating uniformity.

[0098] In one embodiment, the radius of the feed port 32c is adjusted to be between 18 mm and 24 mm.

[0099] For example, the radius of the feed port 32c can be adjusted to 18mm, 19mm, 20mm, 21mm, 22mm, 23mm, or 24mm, etc. This allows the coupled energy at the second sub-region 3112 to correspond to that at the first sub-region 3111, improving the uniformity of radiation.

[0100] In one embodiment, the cooking assembly 100 includes a waveguide shell assembly 2, which is located outside the cooking cavity 200a, and the waveguide shell assembly 2 and the cavity wall of the cooking cavity 200a form a waveguide channel.

[0101] It is understood that the waveguide shell assembly 2 has an internal cavity and is fastened to the outside of the cavity wall of the cooking cavity 200a (the side of the cavity wall away from the cooking cavity 200a). The cavity wall of the cooking cavity 200a and the waveguide shell assembly 2 together form a waveguide channel. On the one hand, the waveguide channel is simple to form, which can reduce the assembly difficulty of the cooking component 100 and improve the manufacturing efficiency of the cooking component 100. On the other hand, the waveguide shell assembly 2 is close to the cavity wall of the cooking cavity 200a, has a compact structure, and saves internal space of the cooking component 100.

[0102] It should be noted that, Figure 2 and Figure 3 The diagram shows only a portion of the cavity wall of the cooking cavity 200a in conjunction with the waveguide shell assembly 2.

[0103] In one embodiment, the cooking assembly 100 includes a waveguide shell assembly 2 and a waveguide cover assembly, both of which are located outside the cooking cavity 200a, and the waveguide shell assembly 2 and the waveguide cover assembly form a waveguide channel.

[0104] Understandably, the waveguide cover assembly has a certain structural strength, which can improve the stability of the waveguide channel, enabling the waveguide channel to stably transmit microwaves to the cooking cavity 200a through the first microwave feed port 31a and the second microwave feed port 32a.

[0105] In this embodiment, the waveguide cover assembly has a first port and a second port, the first port being connected to the first microwave feed port 31a and the second port being connected to the second microwave feed port 32a.

[0106] It should be noted that "corresponding connection between the first port and the first microwave feed port 31a" means that the shape and size of the first port are the same as those of the first microwave feed port 31a. For example, both the first port and the first microwave feed port 31a are arc-shaped ports, or the projection area of ​​the second microwave feed port 32a along the direction perpendicular to the cavity sidewall 32 is located within the projection area of ​​the first port. "Corresponding connection between the second port and the second microwave feed port 32a" means that the shape and size of the second port are the same as those of the second microwave feed port 32a. For example, both the first port and the first microwave feed port 31a are constructed by removing the two apex corners of the top side of a virtual rectangle, or the projection area of ​​the first microwave feed port 31a along the direction perpendicular to the cavity sidewall 32 is within the projection area of ​​the first port.

[0107] In one embodiment, the waveguide housing assembly 2 includes a first housing 21 and a second housing 22, the first housing 21 and the second housing 22 are connected, the first housing 21 extends along the vertical direction of the microwave oven 1000, and the second housing 22 extends along a first direction, wherein the first direction intersects the top and bottom direction.

[0108] It is understood that the extension direction of the first housing 21 is perpendicular to the extension direction of the second housing 22, making the structure of the waveguide housing assembly 2 approximately L-shaped. When the first housing 21 is located on the side of the cavity sidewall 32 away from the cooking cavity 200a, it is convenient for the second housing 22 to extend to the side of the cavity bottom wall 31, making the structure of the waveguide housing assembly 2 reasonable and reducing the space occupied by the waveguide housing assembly 2 in the cooking assembly 100.

[0109] In an embodiment where the cooking assembly 100 includes a waveguide shell assembly 2 and a waveguide cover assembly, the waveguide cover assembly includes a first waveguide cover and a second waveguide cover. The first waveguide cover and the first shell 21 are joined along a first direction; the second waveguide cover and the second shell 22 are joined along the vertical direction of the microwave oven 1000. This simplifies the structure of the waveguide shell assembly 2 and the waveguide cover assembly, making them easy to manufacture. It should be noted that the first waveguide cover and the first shell 21 form a portion of the waveguide channel, and the second waveguide cover and the second shell 22 form another portion of the waveguide channel.

[0110] In some embodiments, the first housing 21 and the second housing 22 are an integral structure. It is understood that, on the one hand, this improves the connection strength between the first housing 21 and the second housing 22, ensuring the shape of the waveguide housing assembly 2 during use and the stability of the waveguide channel, allowing the waveguide channel to stably conduct microwaves into the cooking cavity 200a through the first microwave feed port 31a and the second microwave feed port 32a; on the other hand, it reduces the assembly difficulty of the waveguide housing assembly 2, which is beneficial to improving the manufacturing efficiency of the waveguide housing assembly 2.

[0111] In some embodiments, the first waveguide cover and the second waveguide cover are an integral structure. This improves the connection strength between the two.

[0112] As an example, in one embodiment, please refer to Figure 2 The microwave generator 1 includes a magnetron 11, a bracket 12 and an antenna cap 13. The bracket 12 can be disposed on the side of the first housing 21 away from the cooking cavity 200a along the first direction. The magnetron 11 is connected to the waveguide channel through the bracket 12. The antenna cap 13 can be disposed on the cavity wall of the cooking cavity 200a.

[0113] In one embodiment, the cooking assembly 100 includes a partition. It is understood that the partition has a certain structural strength to support the food.

[0114] For example, a portion of the bottom wall 31 of the cavity is recessed away from the cooking cavity 200a to form a recessed region. The first microwave feed port 31a is located on the bottom wall of the recessed region, and a partition covers the opening of the recessed region. It is understood that the recessed space can increase the internal space of the cooking cavity 200a, making the structure of the cooking assembly 100 more compact. In this embodiment, microwaves can pass through the partition, which prevents moisture in the cooking cavity 200a from entering the first microwave feed port 31a. It should be noted that even without the partition, food can be cooked by placing a container containing food on the bottom wall of the recessed region.

[0115] It should be noted that the microwaves from the first microwave feed port 31a can pass through the partition through the opening in the recessed area to heat the food inside the cooking cavity 200a.

[0116] It should be noted that when a partition is provided in the cooking cavity 200a, it should not be understood that the chamber above the partition is the cooking cavity 200a and the partition is the bottom wall 31 of the cavity. In other words, when a partition is provided, the cooking cavity 200a includes the chamber above the partition and the recessed space below the partition, and the bottom wall of the recessed space is the bottom wall 31 of the cooking cavity 200a.

[0117] In one embodiment, for example, the shape of the adjustment port 32c is not limited; for example, it can be a semi-circle, a circle, or other shapes.

[0118] In one exemplary embodiment, Figure 6 There are six different distribution schemes for the first microwave feed port 31a. In scheme a, compared to scheme b, the angle between the length direction of the first microwave feed port 31a and the first direction is larger, making the distribution of the four first microwave feed ports 31a in scheme a roughly partially truncated circular shape. Scheme c, compared to scheme b, includes a semi-circular adjustment feed port 32c, located in the second sub-region 3112 corresponding to the cavity bottom wall 31. Scheme d is an improvement on scheme a, placing the first sub-region 3111 in the first... The first microwave feed port 31a in the first quadrant and the first microwave feed port 31a in the second sub-region 3112 in the third quadrant are replaced from an arc-shaped port to a semi-circular port; e is an improvement on b, reducing the length of the first microwave feed port 31a in the fourth quadrant of the first sub-region 3111 and the first microwave feed port 31a in the second quadrant of the second sub-region 3112; f is an improvement on c, with a semi-circular adjustable feed port 32c provided in both the first sub-region 3111 and the second sub-region 3112.

[0119] The above description is merely a preferred embodiment of this application and is not intended to limit the application. Various modifications and variations can be made to this application by those skilled in the art. All modifications, equivalent substitutions, improvements, etc., within the spirit and principles of this application are included within the scope of protection of this application.

Claims

1. A cooking component for use in a microwave oven, characterized in that, The cooking assembly has a cooking cavity, the cavity wall of which is formed with a plurality of first microwave feed ports, and the cooking assembly includes: A microwave generator is used to produce microwaves; A waveguide channel is used to conduct microwaves generated by the microwave generator to the cooking cavity through the first microwave feed port. Multiple distributed electric fields are formed in the waveguide channel along the propagation direction of the microwaves. Each distributed electric field corresponds to at least one first microwave feed port. Among the first microwave feed ports corresponding to two adjacent distributed electric fields, those that are offset in opposite directions to the propagation direction of the microwaves form a group. The first microwave feed ports in the same group are used to cut currents flowing in the same direction.

2. A cooking component for use in a microwave oven, characterized in that, The cooking assembly has a cooking cavity, the bottom wall of which is formed with a plurality of first microwave feed ports, and the cooking assembly includes: A microwave generator is used to produce microwaves; A waveguide channel is used to conduct microwaves generated by the microwave generator to the cooking cavity through the plurality of first microwave feed ports. The waveguide channel includes a plurality of standing waves arranged along the microwave propagation direction. The bottom wall of the cavity is divided into a plurality of sub-regions along the microwave propagation direction, and the number of sub-regions is the same as the number of standing waves. Each sub-region is provided with at least one first microwave feed port. The center of each sub-region is taken as the origin of the corresponding four quadrants. The first microwave feed ports of two adjacent sub-regions are arranged in pairs. The absolute value of the difference in the number of quadrants in the sub-region of the same pair of first microwave feed ports is 2.

3. The cooking component according to claim 1 or 2, characterized in that, At least one of the plurality of first microwave feed ports is an arc-shaped port.

4. The cooking component according to claim 3, characterized in that, The length of the arc-shaped opening is between 45mm and 90mm.

5. The cooking component according to claim 1 or 2, characterized in that, At least two of the plurality of first microwave feed ports have different length dimensions.

6. The cooking component according to claim 2, characterized in that, The first microwave feed ports of the same pair are parallel and intersect the propagation direction of the microwave.

7. The cooking component according to claim 2, characterized in that, Each of the sub-regions is provided with a plurality of first microwave feed ports, and at least two of the plurality of first microwave feed ports intersect in the length direction.

8. The cooking component according to claim 2, characterized in that, The cooking assembly includes a cavity sidewall, a cavity top wall, and a cavity bottom wall. The cooking cavity is located within the space formed by the cavity sidewall, the cavity top wall, and the cavity bottom wall. A second microwave feed port is formed on the cavity sidewall. The waveguide channel is used to conduct microwaves generated by the microwave generator to the cooking cavity at least through the second microwave feed port.

9. The cooking component according to claim 8, characterized in that, The second microwave feed port is constructed by removing at least one vertices of a virtual rectangle.

10. The cooking component according to claim 9, characterized in that, At least four of the plurality of first microwave feed ports are distributed in a rotationally symmetrical manner with respect to the center of the cavity bottom wall at the four corners of the cavity bottom wall.

11. The cooking assembly according to claim 10, characterized in that, The number of sub-regions is two, namely a first sub-region and a second sub-region. The first sub-region and the second sub-region are respectively provided at two corners of the cavity bottom wall. The first sub-region is located upstream along the propagation direction of the microwave, and the second sub-region is located downstream along the propagation direction of the microwave. At least one of the multiple second microwave feed ports is an adjustable feed port, and the adjustable feed port is provided in the second sub-region.

12. The cooking component according to claim 11, characterized in that, The cavity sidewall forms a second microwave feed port, and the shape of the first microwave feed port is formed by removing the two apex corners of the top side of the virtual rectangle; The cavity bottom wall has five first microwave feed ports, four of which are arc-shaped, and two of which are perpendicular in length and are respectively located in the first, third, and fourth quadrants of the first sub-region. The remaining two of the first microwave feed ports are perpendicular in length and are respectively located in the first, second, and third quadrants of the second sub-region. The remaining one of the five second microwave feed ports is the adjustment feed port, which is a semi-circular opening and is located in the second sub-region.

13. The cooking component according to claim 12, characterized in that, The radius of the adjustable feed port is between 18mm and 24mm.

14. The cooking component according to claim 8, characterized in that, The cooking assembly includes a waveguide shell assembly located outside the cooking cavity, the waveguide shell assembly and the cavity wall of the cooking cavity forming the waveguide channel.

15. The cooking component according to claim 8, characterized in that, The cooking assembly includes a waveguide shell assembly and a waveguide cover assembly, both of which are located outside the cooking cavity, and the waveguide shell assembly and the waveguide cover assembly enclose the waveguide channel; The waveguide cover assembly has a first port and a second port, the first port being connected to the first microwave feed port and the second port being connected to the second microwave feed port.

16. The cooking assembly according to claim 14 or 15, characterized in that, The waveguide shell assembly includes a first shell and a second shell, the first shell being connected to the second shell, the first shell extending along the vertical direction of the microwave oven, and the second shell extending along a first direction, wherein the first direction intersects the top and bottom directions.

17. A microwave oven, characterized in that, Includes the cooking components as described in any one of claims 1 to 16.

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