A cooking cabinet and microwave oven

Abstract

The application relates to the microwave technology field and provides a cooking box body and a microwave oven. The cooking box body is applied to the microwave oven. The microwave oven is provided with a waveguide pipe. The wavelength of the microwave in the waveguide pipe is a first wavelength. The cooking box body is formed with a cooking cavity. At least one cavity wall of the cooking cavity is a reflection wall. The reflection wall is formed with a plurality of bosses protruding from the surface. The bosses are arrayed in a first direction and a second direction to form a boss collection. Part of each boss is recessed along the thickness direction to form a reflection groove. The length of the slot opening of the reflection groove is 1 / 4 of the first wavelength. The first direction, the second direction and the thickness direction intersect with each other. The edge length of the boss is smaller than the first wavelength. The length of the reflection groove is the extension length of the center line between the two long sides of the width direction of the reflection groove. The cooking box body and the microwave oven can improve the uniformity of heating.

Description

Technical Field

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

[0002] In related technologies, microwaves inside a microwave oven are reflected and dispersed by a diamond backplate to achieve uniform heating of food. However, the structure and shape of diamonds are relatively simple, making it difficult to effectively control microwaves and easily causing individual hot spots in the food, leading to localized overheating. Summary of the Invention

[0003] In view of this, embodiments of this application aim to provide a cooking cabinet and microwave oven that can improve the uniformity of heating.

[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 cabinet for use in a microwave oven. The microwave oven has a waveguide inside, and the wavelength of the microwaves inside the waveguide is a first wavelength. The cooking cabinet forms a cooking cavity, and at least one cavity wall of the cooking cavity is a reflective wall. The reflective wall has a plurality of protrusions on its surface. The plurality of protrusions are arrayed along a first direction and along a second direction to form a protrusion set. A portion of each protrusion is recessed along its thickness direction toward the reflective wall to form a reflective groove. The length of the reflective groove is 1 / 4 of the wavelength of the microwave. The first direction, the second direction, and the thickness direction intersect each other. The side length of the protrusion is smaller than the first wavelength. The length of the reflective groove is the extension length of the midline between the two long edges of the reflective groove in the width direction.

[0006] In one embodiment, the depth of the reflective groove is less than the thickness of the boss.

[0007] In one embodiment, the thickness of the boss is between 2 mm and 8 mm.

[0008] In one embodiment, the projected shape of the reflective groove along the thickness direction of the boss is C-shaped.

[0009] In one embodiment, the reflective grooves on two adjacent protrusions have different orientations.

[0010] In one embodiment, the angle between the orientation directions of the reflective grooves on two adjacent protrusions is 90° or 270°.

[0011] In one embodiment, the protrusion set is divided into multiple first protrusion groups, each first protrusion group including two protrusion columns, the two protrusion columns being spaced apart along a first direction, each protrusion column including two protrusions arranged along a second direction, one of the four protrusions in the first protrusion group being the first protrusion, the remaining three protrusions in the first protrusion group being the second protrusion, the third protrusion, and the fourth protrusion in clockwise or counterclockwise order with the first protrusion as the origin, the orientation direction of the reflective groove of the first protrusion being the first set direction, the angle between the orientation direction of the reflective groove of the second protrusion and the first set direction being 90°, the angle between the orientation direction of the reflective groove of the third protrusion and the first set direction being 180°, and the angle between the orientation direction of the reflective groove of the fourth protrusion and the first set direction being 270°.

[0012] In one embodiment, the plurality of protrusions arranged adjacent to each other along the first direction in the protrusion assembly constitute a second protrusion group. The orientation direction of the reflective groove on the protrusion at one end of the second protrusion group along the first direction is a second predetermined direction. The orientation directions of the reflective grooves on the remaining protrusions arranged along the first direction in the second protrusion group form angles of 90°, 180°, and 270° with the second predetermined direction, respectively; and / or,

[0013] The four protrusions arranged adjacent to each other along the second direction in the protrusion group constitute the third protrusion group. The orientation direction of the reflective groove on the protrusion at one end along the second direction in the third protrusion group is the third predetermined direction. The orientation directions of the reflective grooves on the remaining three protrusions arranged along the second direction in the third protrusion group are respectively 90°, 180° and 270° with the third predetermined direction.

[0014] In one embodiment, the gap between two adjacent bosses is between 2 mm and 5 mm; and / or,

[0015] The side length of the boss is between 22mm and 32mm.

[0016] In one embodiment, the cooking cabinet has a loading / unloading port communicating with the cooking cavity, and the reflective wall is located on the side opposite to the loading / unloading port.

[0017] Another aspect of this application discloses a microwave oven, including the cooking chamber as described in any of the above embodiments.

[0018] This application discloses a cooking cabinet and a microwave oven. On one hand, the protrusions, through their thickness and the length of the reflective groove (1 / 4 wavelength), can enhance the interference of microwaves to generate negative permeability, thereby reflecting microwave signals in different directions to achieve microwave control and improve the uniform heating effect of food. On the other hand, multiple protrusions are arrayed along the first and second directions to form a two-dimensional periodically arranged metasurface structure. Thus, when microwaves propagate to the protrusion array, they can absorb, reflect, or transmit microwaves from different directions. This not only reduces the existence of individual hot spots in food, further improving the uniform heating and defrosting effect of food and providing a better user experience, but also protects the reflective wall portion of the cooking cabinet, extending the service life of the cooking cabinet. Attached Figure Description

[0019] Figure 1 A schematic diagram of the structure of a microwave oven provided in this application embodiment;

[0020] Figure 2 for Figure 1 A structural diagram from another perspective;

[0021] Figure 3 This is a schematic diagram of the structure of the rear plate provided in another embodiment of this application;

[0022] Figure 4 This is a schematic diagram of the structure of a reflective wall provided in another embodiment of this application;

[0023] Figure 5 A schematic diagram of the structure of the first boss assembly provided in another embodiment of this application;

[0024] Figure 6 for Figure 5 A structural diagram from another perspective.

[0025] Explanation of reference numerals in the attached figures

[0026] 100. Microwave oven; 1. Cooking cabinet; 1a. Cooking cavity; 1a1. Reflector wall; 1a2. Boss; 1a3. Reflector groove; 1a4. Groove of the reflector groove; 1a41. First connection port; 1a42. Second connection port; 1a43. Third connection port; 1b. Boss assembly; 1b1. First boss group; 1b11. First boss; 1b12. Third boss; 1b13. Third boss; 1b14. Fourth boss; 1b2. Second boss group; 1b3. Third boss group; 1c. Loading / unloading port; 11. Enclosure; 12. Rear panel; 2. Microwave generator; 3. Cover plate; 3a. Microwave feed port. Detailed Implementation

[0027] 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.

[0028] 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.

[0029] The diamond structure in the related technology has a side length of about 10mm, which is less than 1 / 4 of the wavelength of microwaves. Therefore, it cannot effectively control microwaves and is prone to causing local overheating of food.

[0030] To better understand the cooking enclosure 1 provided in this application, the microwave oven 100 will be described first.

[0031] One embodiment of this application provides a microwave oven 100, please refer to... Figure 1 The microwave oven 100 includes the cooking chamber 1 in any of the following embodiments.

[0032] For example, the microwave oven 100 provided in this application can be a device that uses microwaves for heating and baking, or it can include other functions such as steam heating and air frying.

[0033] For example, the microwave oven 100 also includes a microwave generator 2, a waveguide, and a cover plate 3. The waveguide forms a cavity and a microwave inlet and a microwave outlet communicating with the cavity. The microwave generator 2 is connected to the microwave inlet and is used to emit microwaves into the cavity. The cover plate 3 is placed on the microwave outlet and has a microwave feed port 3a. The microwave feed port 3a is connected to the cavity. In this way, microwaves can be radiated into the cooking chamber 1 through the microwave feed port 3a to heat the food.

[0034] Another embodiment of this application provides a cooking cabinet 1, applied to a microwave oven 100, wherein the wavelength of the microwaves within the waveguide is a first wavelength. Please refer to [link to relevant documentation]. Figures 1 to 6The cooking chamber 1 has a cooking cavity 1a. At least one cavity wall of the cooking cavity 1a is a reflective wall 1a1. The reflective wall 1a1 has a plurality of protrusions 1a2 protruding from its surface. The plurality of protrusions 1a2 are arrayed along a first direction and along a second direction to form a protrusion set 1b. A portion of each protrusion 1a2 is recessed along its thickness direction toward the reflective wall 1a1 to form a reflective groove 1a3. The length dimension L1 of the reflective groove 1a3 is 1 / 4 of the first wavelength. The first direction, the second direction and the thickness direction intersect each other. The side length dimension of the protrusion 1a2 is smaller than the first wavelength. The length dimension L1 of the reflective groove 1a3 is the extension length of the centerline between the two long edges of the reflective groove 1a3 in the width direction.

[0035] The cooking chamber 1 provided in this application features a cooking cavity 1a with at least one cavity wall serving as a reflective wall 1a1. The reflective wall 1a1 has multiple protruding bosses 1a2 on its surface, arranged in an array along a first direction and a second direction to form a boss set 1b. The side length of each boss 1a2 is less than a first wavelength, and each boss 1a2 has a reflective groove 1a3 formed thereon. The length L1 of the reflective groove 1a3 is 1 / 4 of the first wavelength. Thus, the bosses 1a2, through their thickness and the 1 / 4 wavelength length L1 of the reflective groove 1a3, can enhance the interference with microwaves, thereby generating negative permeability. This allows for the reflection of microwave signals in different directions, enabling microwave control and improving the uniform heating effect of the food. On the other hand, the array of multiple protrusions 1a2 along the first and second directions makes the protrusion set 1b a two-dimensional periodic metasurface structure. Thus, when microwaves propagate to the protrusion set 1b, they can absorb, reflect, or transmit microwaves from different directions. This not only reduces the occurrence of individual hot spots in the food, further improving the uniform heating and defrosting effect, resulting in a better user experience, but also protects the part of the cooking cabinet 1 with the reflective wall 1a1, extending the service life of the cooking cabinet 1.

[0036] The microwave oven 100 provided in this application, based on the advantages of the cooking chamber 1 mentioned above, also has the advantage of good heating uniformity.

[0037] For example, in one embodiment, the first direction may refer to the vertical direction of the microwave oven 100, the second direction may refer to the horizontal direction of the microwave oven 100, and the thickness direction may refer to the front-back direction of the microwave oven 100.

[0038] It should be noted that "up" can refer to the direction of the ceiling, while "down" is the opposite of "up." The first direction, the second direction, and the thickness direction can be perpendicular to each other to jointly define a three-dimensional vertical coordinate system.

[0039] For example, Figure 1 and Figure 4R1 can be the first direction, R2 can be the second direction, and R3 can be the thickness direction.

[0040] For example, in one embodiment, the microwave generator 2 can operate at a frequency of 2.45 GHz, resulting in a microwave wavelength of approximately 120 mm.

[0041] In one embodiment, please refer to Figure 1 The cooking chamber 1 has a loading and unloading port 1c that communicates with the cooking cavity 1a, and the reflective wall 1a1 is located on the side opposite to the loading and unloading port 1c.

[0042] For example, the cooking chamber 1 includes a side panel 11 and a rear panel 12. The internal space of the side panel 11 extends through both sides along the thickness direction to form a loading / unloading port 1c and a through port. The rear panel 12 can cover the through port. A reflective wall 1a1 can be disposed on the rear panel 12. The microwave oven 100 includes a door body, which is rotatably connected to the cooking chamber 1 to open or close the loading / unloading port 1c. The rear panel 12, the door body, and the side panel 11 together define the cooking cavity 1a.

[0043] Here, by placing the reflective wall 1a1 on the side opposite to the pick-up and put-out port 1c, on the one hand, since the pick-up and put-out port 1c is on the side where users frequently operate, placing the reflective wall 1a1 on the side opposite to the pick-up and put-out port 1c can reduce physical damage such as collisions and scratches caused by improper operation, reduce the risk of accidental contact, and improve the service life of the reflective wall 1a1 structure; on the other hand, compared with the side perpendicular to the pick-up and put-out port 1c, placing the reflective wall 1a1 on the side opposite to the pick-up and put-out port 1c can improve the uniform heating effect on the food to a certain extent and reduce local overheating.

[0044] In one embodiment, please refer to Figure 6 The depth of the reflective groove 1a3 is less than the thickness of the boss 1a2.

[0045] For example, the difference between the depth of the reflective groove 1a3 and the thickness L2 of the boss 1a2 can be 1. This can reduce the occurrence of bulges in the reflective wall 1a1 due to the reflective groove 1a3 being too deep, thereby improving the overall aesthetics of the cooking cabinet 1.

[0046] In other embodiments, the groove depth of the reflective wall 1a1 can be greater than the thickness L2 of the boss 1a2, so that the reflective wall 1a1 forms an outward convex bulge due to the reflective groove 1a3.

[0047] In one exemplary embodiment, the reflective groove 1a3 can be formed by etching on the boss 1a2.

[0048] In one embodiment, please refer to Figure 6 The thickness L2 of the boss 1a2 is between 2mm and 8mm.

[0049] For example, the thickness L2 of the boss 1a2 can be 2mm, 3mm, 4mm, 5mm, 6mm, 7mm, or 8mm, etc. Here, by setting the boss 1a2 with a suitable thickness L2, the interference effect on microwaves can be enhanced, thereby improving the reflection of microwaves and making the microwaves form a more uniform field distribution in the cooking cavity 1a, thus optimizing the heating efficiency of the food.

[0050] In one embodiment, the gap L3 between two adjacent bosses 1a2 is between 2 mm and 5 mm.

[0051] For example, the gap L3 between two adjacent protrusions 1a2 along the first direction can be between 2mm and 5mm, and the gap L3 between two adjacent protrusions 1a2 along the second direction can also be between 2mm and 5mm. For instance, the gap L3 between two adjacent protrusions 1a2 can be 2mm, 3mm, 4mm, or 5mm, etc. Here, by setting a suitable gap between two adjacent protrusions 1a2, on the one hand, it can help adjust the electromagnetic coupling strength, so that each protrusion 1a2 can independently and fully interact with the microwave, while also generating appropriate coupling with adjacent patterns, thereby enabling precise control of the microwave; on the other hand, a suitable gap can facilitate the processing and manufacturing of the reflective groove 1a3, reducing the processing difficulty.

[0052] In one embodiment, please refer to Figure 5 The side length L4 of the boss 1a2 is between 22mm and 32mm.

[0053] For example, the projected shape of the boss 1a2 along the thickness direction can be a square. The side length L4 of the boss 1a2 can be 22mm, 26mm, 28mm, 30mm or 32mm, etc.

[0054] In this way, by setting a suitable side length L4, the metasurface structure of the boss assembly 1b can resonate at a specific microwave frequency, causing the metasurface structure of the boss assembly 1b to generate electromagnetic induction of microwaves at that frequency. This allows it to effectively absorb, reflect, or transmit microwaves, thereby enhancing the selective control capability of microwave frequency. On the other hand, it can also optimize the electromagnetic interaction between microwaves and bosses 1a2 to a certain extent, allowing more microwave energy to be captured and controlled by the metasurface structure of the boss assembly 1b, reducing microwave energy loss in other parts of the cooking cavity 1a, and improving the heating efficiency of the microwave oven 100.

[0055] In one embodiment, please refer to Figures 1 to 5 The projection shape of the reflective groove 1a3 along the thickness direction of the boss 1a2 is C-shaped.

[0056] For example, the groove 1a4 of the reflective groove may include a first connection port 1a41, a second connection port 1a42, and a third connection port 1a43. The first connection port 1a41 and the third connection port 1a43 are respectively connected to the two ends opposite to the second connection port 1a42, forming a general "C" shape. The length L1 of the reflective groove 1a3 may be the sum of the length a of the first connection port 1a41, the length b of the second connection port 1a42b, and the length c of the third connection port 1a43.

[0057] Here, the open-circuit design of the C-type at 1 / 4 wavelength makes it equivalent to a series resonant circuit. It not only has the advantages of small size, easy matching, effective resonance and no sidelobes, but also the C-type setting makes it easy to see the orientation adjustment in the future, and the structure is simple and easy to manufacture.

[0058] For example, in one embodiment, the projection shape of the reflective groove 1a3 along the thickness direction of the boss 1a2 can also be other shapes such as "H", "L" or "S", as long as its total length dimension is equal to 1 / 4 wavelength.

[0059] In one embodiment, please refer to Figures 1 to 5 The reflective grooves 1a3 on two adjacent protrusions 1a2 have different orientations.

[0060] For example, when the projection shape of the reflective groove 1a3 along the thickness direction of the boss 1a2 is C-shaped, the orientation can be determined by the direction of the opening in the C-shape.

[0061] For example, the reflective grooves 1a3 on two adjacent bosses 1a2 along the first direction may have different orientations, and / or the reflective grooves 1a3 on two adjacent bosses 1a2 along the second direction may have different orientations.

[0062] In this way, by changing the orientation of the reflective grooves 1a3 on two adjacent protrusions 1a2, when microwaves are emitted to the protrusion assembly 1b, the two adjacent protrusions 1a2 can achieve different reflection paths, reducing the local overheating of the food in the cooking cavity 1a and achieving a uniform heating effect on the food.

[0063] In one embodiment, please refer to Figure 4 and Figure 5 The angle between the orientation directions of the reflective grooves 1a3 on two adjacent bosses 1a2 is 90° or 270°.

[0064] For example, the angle between the orientation directions of the reflective grooves 1a3 on two adjacent bosses 1a2 along the first direction may be 90° or 270°, and / or the angle between the orientation directions of the reflective grooves 1a3 on two adjacent bosses 1a2 along the second direction may be 90° or 270°.

[0065] In this way, by setting the included angle between the orientation directions of the reflective grooves 1a3 on two adjacent protrusions 1a2 to 90° or 270°, the reflection angle of the microwaves can be changed, causing them to reflect along different reflection paths, thereby improving the uniformity of coverage of the four corner areas of the cooking cavity 1a.

[0066] In one embodiment, please refer to Figure 5 The protrusion set 1b is divided into multiple first protrusion groups 1b1. Each first protrusion group 1b1 includes two protrusion columns, which are spaced apart along a first direction. Each protrusion column includes two protrusions 1a2 arranged along a second direction. One of the four protrusions 1a2 in the first protrusion group 1b1 is the first protrusion 1b11. The remaining three protrusions 1a2 in the first protrusion group 1b1 are the second protrusions 1b1 in a clockwise or counterclockwise direction with the first protrusion 1b11 as the origin. 2. The third boss 1b13 and the fourth boss 1b14 are set with the orientation of the reflective groove 1a3 of the first boss 1b11 as the setting direction, the angle between the orientation of the reflective groove 1a3 of the second boss 1b12 and the first setting direction is 90°, the angle between the orientation of the reflective groove 1a3 of the third boss 1b13 and the first setting direction is 180°, and the angle between the orientation of the reflective groove 1a3 of the fourth boss 1b14 and the first setting direction is 270°.

[0067] For example, taking clockwise rotation as an example, the upper left is the first boss 1b11, the upper right is the second boss 1b12, the lower right is the third boss 1b13, and the lower left is the fourth boss 1b14. The orientation of the reflective groove 1a3 on the first boss 1b11 can be set to the left, that is, the first set direction can be to the left. The orientation of the reflective groove 1a3 on the second boss 1b12 can be set to the up. The orientation of the reflective groove 1a3 on the third boss 1b13 can be set to the right. The orientation of the reflective groove 1a3 on the fourth boss 1b14 can be set to the down.

[0068] Here, four protrusions 1a2 are used as the first protrusion group 1b1. The reflective grooves 1a3 of the four protrusions 1a2 are arranged in a non-repeating manner along the first and second directions. When microwaves are emitted from any angle to the first protrusion group 1b1 of the protrusion set 1b, four different angles of scattering can be achieved through the different orientations of the reflective grooves 1a3 on the four protrusions 1a2. This can improve the distribution of microwaves in the plane, effectively solve the problem of single microwave reflection path, and improve the heating uniformity of food.

[0069] In one embodiment, please refer to Figure 4In the protrusion set 1b, the multiple protrusions 1a2 arranged adjacent to each other along the first direction constitute the second protrusion group 1b2. The orientation direction of the reflective groove 1a3 on one end of the protrusion 1a2 along the first direction in the second protrusion group 1b2 is the second set direction. The orientation direction of the reflective groove 1a3 on the remaining protrusions 1a2 arranged along the first direction in the second protrusion group 1b2 is 90°, 180° and 270° with the second set direction, respectively.

[0070] For example, the number of second boss groups 1b2 can be 7. Taking the 5th second boss group 1b2 along the second direction of the boss assembly 1b as an example, the orientation of the reflective groove 1a3 on the boss 1a2 at one end along the first direction in the second boss group 1b2 can be set to the left, that is, the second set direction is the orientation, and then it is set to the down, the right, and the up in sequence. The angle between the orientation directions of two adjacent bosses 1a2 is 90°. That is to say, the orientation direction of the reflective groove 1a3 on the bosses 1a2 in the region of the second boss group 1b2 is arranged with the angle between the orientation direction and the second set direction increasing. In this way, the reflection angle can be effectively controlled to ensure that the reflection angle of each boss 1a2 in the second boss group 1b2 is not repeated, so as to fully reflect microwaves.

[0071] In one embodiment, please refer to Figure 4 The four protrusions 1a2 arranged adjacent to each other along the second direction in the protrusion set 1b constitute the third protrusion group 1b3. The orientation of the reflective groove 1a3 on the protrusion 1a2 at one end along the second direction in the third protrusion group 1b3 is the third set direction. The orientation of the reflective groove 1a3 on the remaining three protrusions 1a2 arranged along the second direction in the third protrusion group 1b3 is 90°, 180° and 270° with the third set direction, respectively.

[0072] For example, the orientation of the reflective groove 1a3 on the boss 1a2 at one end along the second direction in the third boss group 1b3 can be set to the left, that is, the third set direction is to the left, and then sequentially set to the up, right, and down. In other words, the angle between the orientation of the reflective groove 1a3 on the boss 1a2 in the region of the third boss group 1b3 and the third set direction increases progressively. In this way, the reflection angle can be effectively controlled, so that the reflection angle of each boss 1a2 in the third boss group 1b3 is not repeated, so as to fully reflect microwaves.

[0073] In one embodiment, please refer to Figure 4In the protrusion set 1b, the multiple protrusions 1a2 arranged adjacent to each other along the first direction constitute the second protrusion group 1b2. The orientation direction of the reflective groove 1a3 on the protrusion 1a2 at one end along the first direction in the second protrusion group 1b2 is the second set direction. The orientation directions of the reflective grooves 1a3 on the remaining protrusions 1a2 arranged along the first direction in the second protrusion group 1b2 are successively at angles of 90°, 180° and 270° with the second set direction. In the protrusion set 1b, the four protrusions 1a2 arranged adjacent to each other along the second direction constitute the third protrusion group 1b3. The orientation direction of the reflective groove 1a3 on the protrusion 1a2 at one end along the second direction in the third protrusion group 1b3 is the third set direction. The orientation directions of the reflective grooves 1a3 on the remaining three protrusions 1a2 arranged along the second direction in the third protrusion group 1b3 are successively at angles of 90°, 180° and 270° with the third set direction.

[0074] In other words, the angle between the orientation of the reflective grooves 1a3 on the protrusion 1a2 in the region of the second protrusion group 1b2 and the second set direction is arranged in an increasing manner, and the angle between the orientation of the reflective grooves 1a3 on the protrusion 1a2 in the region of the third protrusion group 1b3 and the third set direction is arranged in an increasing manner. In this way, the reflection angle can be further adjusted to achieve a uniform distribution of microwave reflection angle in the direction perpendicular to the thickness.

[0075] 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 enclosure for use in a microwave oven, wherein a waveguide is disposed within the microwave oven, and the wavelength of the microwaves within the waveguide is a first wavelength, characterized in that, The cooking chamber has a cooking cavity, at least one cavity wall of which is a reflective wall. The reflective wall has a plurality of protrusions on its surface. The plurality of protrusions are arrayed along a first direction and a second direction to form a protrusion set. A portion of each protrusion is recessed along its thickness direction toward the reflective wall to form a reflective groove. The length of the reflective groove is 1 / 4 of a first wavelength. The first direction, the second direction, and the thickness direction intersect each other. The side length of the protrusion is less than the first wavelength. The length of the reflective groove is the extension length of the centerline between the two long edges of the reflective groove in the width direction.

2. The cooking cabinet according to claim 1, characterized in that, The depth of the reflective groove is less than the thickness of the boss.

3. The cooking cabinet according to claim 2, characterized in that, The thickness of the boss is between 2mm and 8mm.

4. The cooking cabinet according to claim 1, characterized in that, The projection shape of the reflective groove along the thickness direction of the boss is C-shaped.

5. The cooking enclosure according to any one of claims 1 to 4, characterized in that, The reflective grooves on two adjacent protrusions are oriented in different directions.

6. The cooking cabinet according to claim 5, characterized in that, The included angle between the orientation directions of the reflective grooves on two adjacent protrusions is 90° or 270°.

7. The cooking cabinet according to claim 6, characterized in that, The protrusion assembly is divided into multiple first protrusion groups. Each first protrusion group includes two protrusion columns, which are spaced apart along a first direction. Each protrusion column includes two protrusions arranged along a second direction. One of the four protrusions in the first protrusion group is the first protrusion. The remaining three protrusions in the first protrusion group are the second protrusion, the third protrusion, and the fourth protrusion, respectively, arranged clockwise or counterclockwise from the first protrusion as the origin. The orientation of the reflective groove of the first protrusion is taken as the first set direction. The angle between the orientation of the reflective groove of the second protrusion and the first set direction is 90°. The angle between the orientation of the reflective groove of the third protrusion and the first set direction is 180°. The angle between the orientation of the reflective groove of the fourth protrusion and the first set direction is 270°.

8. The cooking cabinet according to claim 6, characterized in that, The plurality of protrusions arranged adjacent to each other along the first direction in the protrusion assembly constitutes a second protrusion group. The orientation direction of the reflective groove on the protrusion at one end of the second protrusion group along the first direction is a second predetermined direction. The orientation directions of the reflective grooves on the remaining protrusions arranged along the first direction in the second protrusion group form angles of 90°, 180°, and 270° with the second predetermined direction, respectively; and / or, The four protrusions arranged adjacent to each other along the second direction in the protrusion group constitute the third protrusion group. The orientation direction of the reflective groove on the protrusion at one end along the second direction in the third protrusion group is the third predetermined direction. The orientation directions of the reflective grooves on the remaining three protrusions arranged along the second direction in the third protrusion group are respectively 90°, 180° and 270° with the third predetermined direction.

9. The cooking cabinet according to claim 1, characterized in that, The gap between two adjacent bosses is between 2 mm and 5 mm; and / or, The side length of the boss is between 22mm and 32mm.

10. The cooking cabinet according to claim 1, characterized in that, The cooking cabinet has an opening for taking out and putting in food that communicates with the cooking cavity, and the reflective wall is located on the side opposite to the opening for taking out and putting in food.

11. A microwave oven, characterized in that, The cooking enclosure includes any one of claims 1 to 10.

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