Cooking equipment

Abstract

The invention provides cooking equipment. The cooking equipment comprises a main body, a microwave generator and a waveguide assembly, wherein the main body is provided with a cooking cavity, and the microwave generator is arranged outside the main body and used for generating microwaves; the waveguide assembly forms a waveguide cavity and feeds microwaves into the cooking cavity through a plurality of first feed ports communicated with the waveguide cavity; the waveguide assembly is further provided with a second feed port communicated with the waveguide cavity and used for feeding microwaves into the waveguide cavity. Wherein the perimeter of the first feed port is in positive correlation with the distance between the first feed port and the second feed port. In this way, the problems that in the prior art, due to the fact that microwave heating uniformity is improved by adding a mechanical structure, faults are prone to occurring, and the space utilization rate of the cooking cavity is low can be solved, and the microwave heating uniformity can be further improved.

Description

Technical Field

[0001] The present application relates to the technical field of household appliances, and in particular to a cooking device. Background Art

[0002] Microwave heating is a common method of home cooking. It works by generating heat through the action of high-frequency microwaves on the polar molecules of food. A major technical difficulty with microwave heating is that the heat tends to be focused in certain areas, resulting in uneven heating of the food.

[0003] One approach involves rotating the food with a turntable to prevent microwave heating from being concentrated in certain areas of the food. Another approach involves adding a stirring blade to the cooking chamber. The rotating blade disrupts the microwave field distribution within the cooking chamber, achieving uniform heating of the food. However, both approaches require a mechanical rotating mechanism, which is prone to failure and reduces the space utilization of the cooking chamber. Summary of the Invention

[0004] The present application provides a cooking device to solve the problems of easy failure and low space utilization of the cooking cavity caused by increasing the uniformity of microwave heating by adding a mechanical structure in the prior art, and to further improve the uniformity of microwave heating.

[0005] To solve the above technical problems, the present application adopts a technical solution: providing a cooking device. The cooking device comprises: a main body, a microwave generator, and a waveguide assembly. The main body is provided with a cooking cavity, and the microwave generator is disposed outside the main body and is used to generate microwaves. The waveguide assembly forms a waveguide cavity, and microwaves are fed into the cooking cavity through a plurality of first feed ports connected to the waveguide cavity. The waveguide assembly is further provided with a second feed port connected to the waveguide cavity for feeding microwaves into the waveguide cavity. The circumference of the first feed port is positively correlated with the distance between the first feed port and the second feed port.

[0006] The wall of the cooking cavity is provided with a plurality of first feed ports; the waveguide assembly comprises: a waveguide tube, which is arranged outside the main body and connected to the microwave generator; a waveguide cover, which is arranged on the wall to form a waveguide cavity, and the waveguide cover is provided with a second feed port.

[0007] Among them, the waveguide assembly includes: a waveguide tube, which is arranged outside the main body and connected to the microwave generator; a waveguide cover, which is arranged on the side of the wall of the cooking cavity facing away from the cooking cavity, and the wall forms a recessed cavity facing the waveguide cover; the waveguide cover is provided with a second feed port; a partition, which is covered at the opening of the recessed cavity to form a waveguide cavity; a feed port plate, which is arranged in the recessed cavity and is provided with multiple first feed ports, and the waveguide cavity is respectively connected to the second feed ports and the first feed ports.

[0008] Wherein, a plurality of first feeding ports are arranged in an array on the same wall surface of the cooking cavity.

[0009] In the vertical direction of the extension direction of the second feed port, the projection of the second feed port on the wall surface coincides with the center point of the wall surface or is located between the center point and the side edge of the wall surface.

[0010] The ratio of the distance between the projection of the second feed port on the wall and the center point to the distance between the side and the center point is less than or equal to one third.

[0011] The microwave generator, the waveguide tube and the waveguide cover are arranged at the bottom of the main body, and the wall surface includes the bottom wall of the cooking cavity.

[0012] The first feed port includes at least a first feed portion and a second feed portion and a third feed portion connected to both ends of the first feed portion respectively. The first feed portion is not on the same straight line as the second feed portion and the third feed portion, and the second feed portion and the third feed portion are located on the same side of the first feed portion.

[0013] The plurality of first feed ports include a third feed port, and the third feed port is located in the peripheral area of ​​the matrix along the vertical direction; the first feed portion of the third feed port extends along the extension direction, and the second feed portion and the third feed portion of the third feed port extend along the length direction and away from the first feed portion.

[0014] The plurality of first feed ports further include a fourth feed port, and along the vertical direction, the fourth feed port is located in the middle area of ​​the array; the fourth feed port further includes a first extension portion that is parallel to its second feed port and is respectively connected to the second feed portion of the fourth feed port and the first feed portion of the fourth feed port; the fourth feed port further includes a second extension portion that is parallel to its third feed port and is respectively connected to the third feed portion of the fourth feed port and the first feed portion of the fourth feed port; the first extension portion and the second extension portion are arranged on the same side.

[0015] Wherein, along the extension direction, the first feeding portion of the fourth feed port located in the peripheral area of ​​the array is arranged parallel to the extension direction, and the first feeding portion of the fourth feed port located in the middle area of ​​the array is arranged at an acute angle to the extension direction.

[0016] The distance between the geometric centers of two adjacent feed ports is a second preset ratio of the wavelength of the microwave; wherein the second preset ratio is 0.25-0.75.

[0017] The beneficial effects of the present application are as follows: the cooking device provided by the present application includes: a main body, a microwave generator, and a waveguide assembly; wherein, the main body is provided with a cooking cavity, the microwave generator is arranged outside the main body and is used to generate microwaves; the waveguide assembly forms a waveguide cavity, and microwaves are fed into the cooking cavity through a plurality of first feed ports connected to the waveguide cavity; the waveguide assembly is also provided with a second feed port connected to the waveguide cavity, for feeding microwaves into the waveguide cavity; wherein the circumference of the first feed port is positively correlated with the distance between the first feed port and the second feed port. In this way, the present application adopts multiple feed ports to feed the microwaves in the waveguide cavity into the cooking cavity, which not only improves the uniformity of microwave radiation, thereby improving the uniformity of microwave heating, but also does not require the setting of a mechanical structure, thereby improving the space utilization of the cooking cavity, improving its reliability and reducing costs; and through multiple feed ports, the uniformity of microwave radiation can be improved, thereby improving the uniformity of microwave heating; further, the distance between the microwave feed port of the waveguide cavity of the present application, that is, the second feed port and the microwave feed port of the cooking cavity, that is, the first feed port, is positively correlated with the circumference of the first feed port, so that the farther the first feed port is from the second feed port, the larger the circumference, and the microwaves fed into the cooking cavity from each first feed port can be balanced, thereby improving the uniformity of the microwave field in the cooking cavity, and further improving the uniformity of microwave heating. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present application. Those skilled in the art can also derive other drawings based on these drawings without inventive work, among which:

[0019] Figure 1 This is a structural diagram of an embodiment of the cooking device of the present application;

[0020] Figure 2 yes Figure 1 A schematic structural diagram of a portion of the structure of an embodiment;

[0021] Figure 3 This is a structural diagram of an embodiment of a first feed port of the cooking device of the present application;

[0022] Figure 4 This is a structural diagram of another embodiment of the first feeding port of the cooking device of the present application;

[0023] Figure 5 It is a structural schematic diagram of another embodiment of the cooking device of the present application. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0025] It should be noted that if the embodiments of the present application involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0026] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present application, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0027] The cooking equipment provided in this application may include microwave ovens, microwave ovens and other cooking equipment with microwave cooking functions. This application will be described using a microwave oven as an example.

[0028] This application proposes a cooking device, such as Figures 1 to 4 As shown, Figure 1 This is a structural diagram of an embodiment of the cooking device of the present application; Figure 2 yes Figure 1 A schematic structural diagram of a portion of the structure of an embodiment; Figure 3 This is a structural diagram of an embodiment of a first feed port of the cooking device of the present application; Figure 4 This is a schematic structural diagram of another embodiment of the first feed port of the cooking device of the present application. The cooking device of this embodiment includes: a main body 11, a microwave generator 122, and a waveguide assembly; wherein the main body 11 is provided with a cooking cavity 111, and the microwave generator 122 is disposed outside the main body 11 and is used to generate microwaves; the waveguide assembly forms a waveguide cavity 121, and microwaves are fed into the cooking cavity 111 through a plurality of first feed ports 20 connected to the waveguide cavity 121; the waveguide assembly further includes a second feed port connected to the waveguide cavity 121, for feeding microwaves into the waveguide cavity 121; wherein the circumference L of the first feed port 20 is positively correlated with the distance D4 between the first feed port 20 and the second feed port.

[0029] The positive correlation between the perimeter L of the first feed opening 20 and the distance D4 between the first feed opening 20 and the second feed opening means that the perimeter L of the first feed opening 20 increases as the distance D4 between the first feed opening 20 and the second feed opening increases, and decreases as the distance D4 between the first feed opening 20 and the second feed opening decreases.

[0030] The waveguide component forming the waveguide cavity 121 means that the waveguide component independently forms the waveguide cavity 121 or cooperates with the main body 11 to form the waveguide cavity 121.

[0031] Among them, the main body 11 includes a box body (not marked in the figure) and a door body (not marked in the figure). The box body forms a accommodating cavity with an opening for accommodating food; the door body cover is arranged on the opening to seal the accommodating cavity to form a cooking cavity 111, which can reduce microwave leakage and heat loss and improve cooking effect.

[0032] Optionally, the wall of the cooking cavity 111 is provided with a plurality of first feed ports 20 connected to the cooking cavity 111; the waveguide assembly includes a waveguide tube 123 and a waveguide cover 124, the waveguide tube 123 is arranged outside the main body 11 and is connected to the microwave generator 122; the waveguide cover 124 is covered on the wall to form the waveguide cavity 121, and the waveguide cover 124 is provided with a second feed port connected to the waveguide tube 123.

[0033] Among them, the microwave generator 122, the waveguide tube 123, and the waveguide cover 124 are arranged on the outer wall of the main body 11, that is, they are arranged outside the cooking cavity 111, so as to reduce the impact of the internal environment of the cooking cavity 111 on the microwave generator 122, the waveguide tube 123, and the waveguide cover 124, improve their reliability, and improve the space utilization of the cooking cavity 111; and connecting the microwave generator 122, the waveguide tube 123, and the waveguide cover 124 to the main body 11 can improve their stability.

[0034] The uniformity of food heating within the cooking cavity 111 is related to the uniformity of the microwave field within the cooking cavity 111. If the microwave field within the cooking cavity 111 is poorly uniform, the microwave distribution within the cooking cavity 111 will be uneven, resulting in uneven heating of different parts of the food, affecting the cooking effect. To address this issue, the waveguide cavity 121 of this embodiment is connected to multiple first feed ports 20 for uniformly distributing the microwave field within the cooking cavity 111.

[0035] The first feed ports 20 are used to radiate microwaves into the cooking cavity 111 . The microwaves radiated into the cooking cavity 111 by the first feed ports 20 are coupled with each other, so that the microwave field in the cooking cavity 111 tends to be balanced.

[0036] The perimeter L of the first feed opening 20 refers to the length of a circle around the edge of the slit of the first feed opening 20 .

[0037] In this embodiment, multiple first feed ports 20 are used to feed microwaves from the waveguide cavity into the cooking cavity. This not only improves the uniformity of microwave radiation, thereby improving the uniformity of microwave heating, but also eliminates the need for a mechanical structure. Therefore, the space utilization of the cooking cavity 111 can be improved, its reliability can be improved, and its cost can be reduced. Furthermore, the multiple first feed ports 20 can improve the uniformity of microwave radiation, thereby improving the uniformity of microwave heating. Furthermore, in this embodiment, the distance between the microwave feed port of the waveguide cavity 121, i.e., the second feed port, and the microwave feed port of the cooking cavity, i.e., the first feed port 20, is positively correlated with the circumference L of the first feed port 20. This allows the circumference of the first feed port 20 to be larger as it is farther from the second feed port. This allows the microwaves fed into the cooking cavity from each first feed port 20 to be balanced, thereby improving the uniformity of the microwave field within the cooking cavity 111 and further improving the uniformity of microwave heating.

[0038] The microwave generator 122 is the heart of the microwave oven, converting DC power into microwave energy. Microwave generator 122 may include a magnetron. Of course, in other embodiments, transistors or diodes may be used instead of the magnetron. The microwave energy generated by the magnetron is transmitted to the cooking cavity 111 via a waveguide 123. One end of the waveguide 123 is connected to the magnetron's antenna, and the other end communicates with the waveguide cavity 121.

[0039] The waveguide cover 124 is provided with a second feed port communicating with the waveguide cavity 121 and the waveguide tube 123 .

[0040] When the cooking device performs microwave heating on food, the microwave generator 122 operates to generate microwaves. The microwaves generated by the microwave generator 122 are first transmitted to the waveguide cavity 121 through the waveguide tube 123, and then transmitted to the multiple first feed ports 20. Since the multiple first feed ports 20 are connected to the cooking cavity 111, the microwaves are radiated into the cooking cavity 111 through the multiple first feed ports 20 to perform microwave heating on the food.

[0041] In this embodiment, the wall of the cooking cavity 111 serves as a microwave feed port, and multiple first feed ports 20 are provided. This reduces components, reduces the size of the cooking device, and saves costs. By providing multiple first feed ports 20 on the wall of the cooking cavity 111, microwaves can be radiated into the cooking cavity 111 through the multiple feed ports 20. Furthermore, the microwaves radiated into the cooking cavity 111 can be regulated by the multiple first feed ports 20, so that the microwaves radiated into the cooking cavity 111 by each first feed port 20 are mutually coupled, resulting in a more balanced microwave field within the cooking cavity 111. This allows a uniform microwave field to be formed within the cooking cavity 111 without the need for a mechanical rotation mechanism. This simplifies the product structure, reduces production costs, and reduces the size of the product, facilitating a miniaturized design. It also enhances the cooking performance of the cooking device, ensuring that ingredients are evenly heated by microwaves.

[0042] In other embodiments, the volume of the waveguide tube can be expanded to form a waveguide cavity. A plurality of first feed ports are provided on a side of the waveguide tube close to the cooking cavity, and a plurality of first feed ports are provided on a wall of the cooking cavity close to the waveguide tube, and are arranged one-to-one corresponding to the plurality of first feed ports on the waveguide tube. The first feed ports on the waveguide tube are connected to the corresponding first feed ports on the wall to feed the microwaves in the waveguide cavity into the cooking cavity.

[0043] Optionally, a plurality of first feeding ports 20 are arranged in an array on the same wall surface of the cooking cavity 111 .

[0044] In this embodiment, the multiple first feeding ports 20 are arranged in an array on the same wall surface of the cooking cavity 111 to form multiple radiation points arranged in an array, which can improve the uniformity of the microwave feeding points and thus improve the uniformity of microwave heating.

[0045] For example, the wall surface of the cooking cavity 111 is rectangular, and the plurality of first feeding ports 20 are arranged in a matrix.

[0046] Optionally, the projections of the first feed port 20 and the second feed port on the wall surface are positively correlated with the distance between the first feed port 20 .

[0047] Optionally, the circumference L of the first feed port 20 of this embodiment is a first preset ratio of the wavelength λ of the microwave.

[0048] Here, the wavelength λ of the microwave is the wavelength of the microwave in free space.

[0049] In this embodiment, the circumference L of the first feed port 20 is a first preset ratio of the wavelength λ of the microwave, that is, the circumference L of the first feed port is related to the microwave wavelength λ, which can improve the radiation efficiency of the first feed port 20 to the microwave and improve the microwave heating efficiency; and through multiple first feed ports 20, the uniformity of microwave radiation can be improved, thereby further improving the uniformity of microwave heating.

[0050] Optionally, the first preset ratio in this embodiment is 1.5-0.5, that is, the circumference L of the first feed port 20 is 1.5-0.5 times the wavelength λ of the microwave.

[0051] The first preset ratio may specifically be 1.5, 1.25, 1, 0.75, 0.5, etc.

[0052] In this embodiment, the circumference L of the first feed port 20 is set to 1.5-0.5 times the microwave wavelength λ, which not only improves the radiation efficiency and effect of the first feed port 20 on microwaves, but also enables a cooking device of the same volume to be provided with a larger number of first feed ports 20, thereby further improving the uniformity and microwave intensity of the microwave field in the cooking cavity 111, and further improving the uniformity and heating effect of microwave heating, thereby saving energy consumption.

[0053] Optionally, the first preset ratio in this embodiment is 1, that is, the circumference L of the first feed port 20 is equal to the microwave wavelength λ.

[0054] The larger the perimeter L of the first feed port 20 is, the larger the area it occupies is. The smaller the number of first feed ports 20 provided in the same area is, the better. In this embodiment, the perimeter L of the first feed port 20 is set to the microwave wavelength λ, which can achieve an optimal compromise between the radiation efficiency and effect of the first feed port 20 on the microwave and the number of the first feed ports 20, thereby better improving the microwave heating effect.

[0055] Optionally, the microwave generator 122, waveguide tube 123, and waveguide cover 124 are arranged on the same side as the first feed port 20, that is, the microwave generator 122, waveguide tube 123, waveguide cover 124 and the first feed port 20 are located on the same side of the cooking cavity 111. This structure can shorten the distance microwaves are transmitted to the first feed port 20, reduce the length of the waveguide cavity 121, reduce the volume of the cooking device, and reduce microwave loss.

[0056] Optionally, the microwave generator 122 , the waveguide tube 123 , and the waveguide cover 124 may be disposed at the bottom of the main body 11 ; and the first feeding port 20 is disposed on the bottom wall of the cooking cavity 111 .

[0057] Since the food in the cooking cavity 111 is usually distributed horizontally through the food utensils, the microwave generator 122, the waveguide tube 123, and the waveguide cover 124 are arranged at the bottom of the main body 11, which can shorten the transmission distance of the microwave to various areas of the food and improve the heating efficiency and effect; and the microwave generator 122, the waveguide tube 123, the waveguide cover 124 are arranged on the same side as the first feeding port 20, that is, the microwave generator 122, the waveguide tube 123, the waveguide cover 124 and the first feeding port 20 are located on the same side of the cooking cavity 111, which can shorten the distance of microwave transmission to the first feeding port 20, reduce the length of the waveguide cavity 121, reduce the volume of the cooking equipment, and reduce microwave loss.

[0058] Optionally, other walls of the cooking cavity 111 may be compatible with functions such as hot air and light baking.

[0059] In other embodiments, the first feed port may also be provided on the top wall of the cooking cavity, and the microwave generator, waveguide tube, and waveguide cover may also be located on the top of the main body; or the microwave assembly may also be provided on the side of the main body.

[0060] In another embodiment, Figure 5 As shown, the waveguide assembly includes: a waveguide tube 123, a waveguide cover 124, a partition 501, and a feed plate 500; wherein the waveguide tube 123 is arranged outside the main body 11 and is connected to the microwave generator 122; the waveguide cover 124 is covered on the side of the cooking cavity 111 facing away from the cooking cavity 111, and the wall forms a recessed cavity facing the waveguide cover 124; the waveguide cover 124 is provided with a second feed port; the partition 501 is covered at the opening of the recessed cavity to form the waveguide cavity 121; the feed plate 500 is arranged in the recessed cavity, and the feed plate 500 is provided with a plurality of first feed ports 20, and the waveguide cavity 121 is respectively connected to the second feed ports and the first feed ports 20.

[0061] The wall surface of the cooking cavity 111 is further provided with a through hole communicating with the second feeding port and the waveguide cavity 121 .

[0062] Optionally, the distance D1 between the geometric centers of two adjacent first feed ports 20 is a second preset ratio of the wavelength λ of the microwave; wherein the second preset ratio is 0.25-0.75.

[0063] The second preset ratio may specifically be 0.25, 0.5, 0.75, etc.

[0064] In this embodiment, the distance between the geometric centers of the two adjacent first feed ports 20 is a second preset ratio of the microwave wavelength λ, that is, the distance between the two adjacent first feed ports 20 is related to the microwave wavelength, which can improve the radiation efficiency of the feed ports to microwaves and improve the microwave heating efficiency; in this embodiment, the distance between the geometric centers of the two adjacent first feed ports 20 is set to 0.25-0.75 times the microwave wavelength λ, which can make the microwaves more evenly radiated from the multiple first feed ports 20 into the cooking cavity without being concentrated on a single or a few first feed ports 20, thereby improving the uniformity of the microwave field in the cooking cavity and the uniformity of microwave heating, and enabling a cooking device of the same volume to be provided with a larger number of first feed ports 20, thereby further improving the microwave intensity of the microwave field in the cooking cavity 111, thereby further improving the heating effect and saving energy consumption.

[0065] Optionally, the second preset ratio in this embodiment is 0.5.

[0066] In this embodiment, the distance between the geometric centers of two adjacent first feed ports 20 is set to half the microwave wavelength λ, which can achieve an optimal compromise between the radiation uniformity of the multiple first feed ports 20 to the microwaves and the number of the first feed ports 20, thereby better improving the microwave heating effect.

[0067] In other embodiments, a plurality of first feed ports may be arranged in different radiation areas of the wall surface, and the distance between the geometric centers of two adjacent radiation areas is a second preset ratio of the wavelength λ of the microwave.

[0068] Optionally, the gap width of the first feeding port 20 of this embodiment is greater than or equal to 8 mm.

[0069] For example, the first feed port 20 includes a strip-shaped gap, and the gap width of the strip-shaped gap is a dimension perpendicular to the length extension direction of the strip-shaped gap.

[0070] If the gap width of the first feed port 20 is too small, it can easily cause sparks at the location where the first feed port 20 is deformed during microwave transmission. To improve the sparking problem, this embodiment sets the gap width of the first feed port 20 to be greater than or equal to 8 mm. This can reduce the sparking phenomenon caused by the deformation of the first feed port 20 and improve the safety and reliability of the product.

[0071] Among them, the gap width can be 8mm, 9mm, 10mm, etc.

[0072] In other embodiments, a flange may be provided at the first feeding port, and the flange extends in the direction toward the cooking cavity. The flange can improve the strength of the first feeding port, prevent the first feeding port from being deformed, and avoid sparks caused by the deformation of the first feeding port, thereby improving the safety and reliability of the product.

[0073] Optionally, the multiple first feeding ports 20 of this embodiment are arranged in an array on the same wall surface of the cooking cavity 111 to form multiple radiation points arranged in an array, which can improve the uniformity of the microwave feeding points and thus improve the uniformity of microwave heating.

[0074] For example, the wall surface of the cooking cavity 111 is rectangular, and the plurality of first feeding ports 20 are arranged in a matrix.

[0075] Optionally, along a direction perpendicular to the extension direction of the second feed port, the second feed port is located between a center point of the wall surface and a side edge of the wall surface.

[0076] Because multiple first feed ports 20 are evenly arranged in an array on the wall, and microwaves can be radiated relatively evenly into the cooking cavity 111 along the extension direction of the second feed ports, this embodiment places the second feed port of the waveguide cavity 121 near the center point of the wall where the first feed port 20 is located, perpendicular to the extension direction of the second feed port. This shortens the distance difference between the second feed port and each first feed port 20, and reduces the difference in the transmission of microwaves fed from the second feed port to the multiple first feed ports 20. This improves the uniformity of microwaves fed into the multiple first feed ports 20 and the uniformity of microwave heating. At the same time, the center point of the wall can be reserved for other microwave structures.

[0077] In this embodiment, the second feed port is disposed close to the center point of the wall surface, and microwaves can be transmitted in two directions. Good matching can be achieved by adjusting the coupling window of the waveguide cover 124, that is, the second feed port.

[0078] Optionally, in this embodiment, the extension direction of the second feed port coincides with the center point of the wall surface where the second feed port is located, which can further improve the uniformity of microwave heating.

[0079] Optionally, the vertical direction includes the length direction x of the wall surface. In this way, the extension length of the second feed port can be reduced and the strength of the waveguide cover 124 can be improved.

[0080] Optionally, in this embodiment, along the width direction y of the wall, the second feed port is located at the center point of the wall surface and coincides with the center point of the wall surface, which can further improve the uniformity of microwave heating.

[0081] In other embodiments, the extension direction of the second feed port can be the length direction of the wall surface. Along the length direction of the wall surface, the second feed port coincides with the center point of the wall surface, which can further improve the uniformity of microwave feeding by multiple feed ports and improve the uniformity of microwave heating; along the width direction of the wall surface, the second feed port coincides with the center point of the wall surface or the center point and the side of the wall surface.

[0082] Optionally, the ratio of the distance D2 between the second feed ports and the center point of the wall surface to the distance D3 between the side edge of the wall surface and the center point of the wall surface in this embodiment is less than or equal to one-third. In this manner, not only can the uniformity of microwaves fed by the multiple first feed ports 20 be improved, thereby improving the uniformity of microwave heating, but also the center point of the wall surface can be reserved for other microwave structures. Furthermore, because the microwave generator 122 and the waveguide tube 123 have a certain size, the installation and routing of the microwave generator 122 and the waveguide tube 123 can be facilitated.

[0083] Optionally, the first feed port 20 of this embodiment includes at least a first feed portion 21 and a second feed portion 22 and a third feed portion 23 respectively connected to the two ends of the first feed portion 21, the first feed portion 21 and the second feed portion 22 and the third feed portion 23 are not on the same straight line, and the second feed portion 22 and the third feed portion 23 are located on the same side of the first feed portion 21.

[0084] The first feed portion 21 is the middle portion of the first feed opening 20, and the second feed portion 22 and the third feed portion 23 are the two ends of the first feed opening 20, which are connected by the first feed portion 21 to form the first feed opening 20. The second feed portion 22, the first feed portion 21, and the third feed portion 23 extend in sequence along the length direction of the first feed opening 20. The sum of the lengthwise dimensions of the second feed portion 22, the first feed portion 21, and the third feed portion 23 is the circumference L of the first feed opening 20.

[0085] Optionally, the widths of the first feed portion 21 , the second feed portion 22 , and the third feed portion 23 may be the same.

[0086] In this embodiment, the two ends of the first feed port 20, namely the second feed portion 22 and the third feed portion 23, and its middle portion, namely the first feed portion 21, are not on the same straight line, and the second feed portion 22 and the third feed portion 23 are located on the same side of the first feed portion 21. This can improve the problem of the first feed port 20 being too large in a certain direction, and can reduce the area of ​​a single first feed port 20, making it easier to set up a larger number of first feed ports 20 within the same area, thereby improving the uniformity of microwave heating and achieving the target circumference of the first feed port 20.

[0087] Optionally, the multiple first feed ports 20 of this embodiment include a third feed port A, which is located in the peripheral area of ​​the array along a perpendicular direction of the second feed port, such as the length direction x of the wall on which the first feed port 20 is provided; wherein the first feed portion 21 of the third feed port A extends along the extension direction of the second feed port, such as the width direction y of the wall, and the second feed portion 22 and the third feed portion 23 of the third feed port A extend along the perpendicular direction and away from the first feed portion 21.

[0088] The wall is usually arranged in a rectangular shape, and its length direction x refers to the long side direction of the rectangle. For example, the door and the cabinet of the cooking device are arranged along the width direction y, and the length direction x is perpendicular to the arrangement direction of the door and the cabinet.

[0089] The third feed port A of this embodiment is U-shaped, with both ends extending away from the middle area of ​​the wall, which can feed microwaves into the cooking cavity 111 from both sides along the length direction x of the cooking cavity 111, thereby improving the uniformity of microwave heating.

[0090] Optionally, the multiple first feed ports 20 of this embodiment further include a fourth feed port B, which is located in the middle area of ​​the array along a perpendicular direction to the second feed port, such as the longitudinal direction x of the wall; wherein the fourth feed port B further includes a first extension portion 24 that is parallel to its second feed portion 22 and respectively connects to the second feed portion 22 of the fourth feed port B and the first feed portion 21 of the fourth feed port B, and the fourth feed port B further includes a second extension portion 25 that is parallel to its third feed portion 23 and respectively connects to the third feed portion 23 of the fourth feed port B and the first feed portion 21 of the fourth feed port B, and the first extension portion 24 and the second extension portion 25 are arranged on the same side.

[0091] The fourth feed port B of this embodiment is arranged in an I shape, and its two ends extend in opposite directions away from the middle area of ​​the wall, which can feed microwaves into the cooking cavity 111 from both sides of the cooking cavity 111 along the length direction x, thereby improving the uniformity of microwave heating.

[0092] Optionally, along the extension direction of the second feed port, such as the width direction y of the wall, the first feed portion 21 of the fourth feed port B located in the peripheral area of ​​the array is arranged parallel to the extension direction, and the first feed portion 21 of the fourth feed port B located in the middle area of ​​the array is arranged at an acute angle to the width direction y.

[0093] For example, Figure 2 As shown, multiple first feed openings 20 are arranged in a matrix. Along the length direction x of the wall, the first feed openings 20 in the middle area of ​​the matrix are arranged in an I shape, and the first feed openings 20 in the peripheral area of ​​the matrix are arranged in a U shape. The perimeter L of the first feed openings 20 in the middle area of ​​the matrix is ​​smaller than the perimeter L of the first feed openings 20 in the peripheral area of ​​the matrix; and along the width direction y of the wall, the perimeter L of the first feed openings 20 in the middle area of ​​the matrix is ​​smaller than the perimeter L of the first feed openings 20 in the peripheral area of ​​the matrix.

[0094] like Figure 2 As shown, the first feed portions 21 of the first feed ports 20 in the matrix's peripheral region extend along the width direction y of the wall surface, while the first feed portions 21 of the first feed ports 20 in the matrix's central region extend at an acute angle to the width direction y. This design method can reduce the y-direction length of a single feed port 20 while achieving the target perimeter of the feed ports 20, facilitating the installation of a greater number of feed ports 20 within the same area, thereby improving microwave heating uniformity.

[0095] For example, Figure 3As shown, multiple first feed openings 20 are arranged in a matrix. Along the length direction x of the wall, the first feed openings 20 in the central region of the matrix are arranged in an I-shaped and circular arc shape, while the first feed openings 20 in the peripheral region of the matrix are arranged in a U-shaped shape. The perimeter L of the first feed openings 20 in the central region of the matrix is ​​smaller than the perimeter L of the first feed openings 20 in the peripheral region of the matrix. Furthermore, along the width direction y of the wall, the perimeter L of the first feed openings 20 in the central region of the matrix is ​​smaller than the perimeter L of the first feed openings 20 in the peripheral region of the matrix. The first feed portions 21 of the first feed openings 20 in the peripheral region of the matrix extend along the width direction y of the wall, while the first feed openings 20 in the central region of the matrix are arranged in an arc shape.

[0096] Along the length direction x of the wall, the semi-I-shaped patterns in the peripheral area of ​​the matrix face in opposite directions. This design method can fully utilize the space at the left and right edges, making it easier to arrange more feed ports 20 within the same area, thereby improving microwave heating uniformity.

[0097] like Figure 3 As shown, multiple I-shaped first feed ports 20 are positioned on either side of the multiple C-shaped, or arc-shaped, first feed ports 20, with the multiple C-shaped first feed ports 20 positioned adjacent to each other. The multiple I-shaped and C-shaped first feed ports 20 are symmetrically arranged about the axis x, the longitudinal direction of the cooking cavity 111. This allows the waveguide 123 to cover the second feed ports, preventing wave leakage. It also helps adjust the microwave standing wave ratio, allowing more microwaves to enter the cooking cavity 111.

[0098] Optionally, the first feed port 20 of this embodiment can be arranged in at least one of a U-shape, an I-shape, and an arc shape. The feed ports of these shapes have a smaller area, and more first feed ports 20 can be arranged in the same area, thereby improving the uniformity of microwave heating.

[0099] In other embodiments, the shape of the feed openings can also be other letters, words, or geometric figures. The shapes of the multiple feed openings can be the same or different, and the shapes of the multiple feed openings can be any one of letters, words, or geometric figures, or a combination of at least two of them. This facilitates the mutual coupling of microwaves radiated by the various feed openings within the cooking cavity, making the microwave field within the cooking cavity more balanced, thereby ensuring uniform microwave heating of the food and improving the cooking effect.

[0100] In other embodiments, the positions of the feed ports can be adjusted according to actual needs, and the microwaves radiated by the array feed ports can be made more uniform by designing the number, distribution, and size of the feed ports.

[0101] The above is only an implementation method of the present application and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the description and drawings of this application, or directly or indirectly used in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A cooking device, characterized in that: include: The main body is provided with a cooking cavity; a microwave generator, disposed outside the main body and used for generating microwaves; A waveguide assembly forms a waveguide cavity and feeds the microwaves into the cooking cavity through a plurality of first feed ports communicating with the waveguide cavity; the waveguide assembly is further provided with a second feed port communicating with the waveguide cavity for feeding the microwaves into the waveguide cavity; The perimeter of the first feed port is positively correlated with the distance between the first feed port and the second feed port.

2. The cooking device according to claim 1, wherein The wall surface of the cooking cavity is provided with the plurality of first feed ports; the waveguide assembly comprises: a waveguide, disposed outside the main body and connected to the microwave generator; The waveguide cover is arranged on the wall surface to form a waveguide cavity, and the waveguide cover is provided with the second feeding port.

3. The cooking device according to claim 1, wherein The waveguide assembly comprises: a waveguide, disposed outside the main body and in communication with the microwave generator; a waveguide cover, which is arranged on a side of the wall of the cooking cavity facing away from the cooking cavity, wherein the wall forms a concave cavity facing the waveguide cover; and the waveguide cover is provided with the second feed port; a partition plate, covering the opening of the recessed cavity to form the waveguide cavity; A feed port plate is arranged in the recessed cavity and is provided with the plurality of first feed ports. The waveguide cavity is respectively connected with the second feed ports and the first feed ports.

4. The cooking device according to claim 1, wherein The plurality of first feeding ports are arranged in an array on the same wall surface of the cooking cavity.

5. The cooking device according to claim 1 or 4, characterized in that: Along a direction perpendicular to the extension direction of the second feed port, the second feed port coincides with a center point of the wall surface or is located between the center point and a side edge of the wall surface.

6. The cooking device according to claim 5, characterized in that A ratio of a distance between the second feed port and the center point to a distance between the side edge and the center point is less than or equal to one third.

7. The cooking device according to claim 1, wherein The microwave generator, the waveguide tube and the waveguide cover are arranged at the bottom of the main body, and the wall surface includes the bottom wall of the cooking cavity.

8. The cooking device according to claim 4, wherein: The first feed port includes at least a first feed portion and a second feed portion and a third feed portion respectively connected to both ends of the first feed portion. The first feed portion is not on the same straight line as the second feed portion and the third feed portion, and the second feed portion and the third feed portion are located on the same side of the first feed portion.

9. The cooking device according to claim 5, characterized in that The plurality of first feed ports include a third feed port, and along the vertical direction, the third feed port is located in a peripheral area of ​​the array; The first feeding portion of the third feeding port extends along the extending direction, and the second feeding portion and the third feeding portion of the third feeding port extend along the vertical direction and away from the first feeding portion.

10. The cooking device according to claim 5, wherein The plurality of first feed ports further include a fourth feed port, and along the vertical direction, the fourth feed port is located in a middle area of ​​the array; The fourth feed port further includes a first extension portion that is parallel to its second feed portion and is respectively connected to the second feed portion of the fourth feed port and the first feed portion of the fourth feed port. The fourth feed port further includes a second extension portion that is parallel to its third feed portion and is respectively connected to the third feed portion of the fourth feed port and the first feed portion of the fourth feed port. The first extension portion and the second extension portion are arranged on the same side.

11. The cooking device according to claim 10, characterized in that Along the extension direction, the first feeding portion of the fourth feed port located in the peripheral area of ​​the array is arranged parallel to the extension direction, and the first feeding portion of the fourth feed port located in the middle area of ​​the array is arranged at an acute angle to the extension direction.

12. The cooking device according to claim 1, wherein The distance between the geometric centers of two adjacent first feed ports is a second preset ratio of the wavelength of the microwave; Wherein, the second preset ratio is 0.25-0.75.

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