CN114302525A - Microwave oven - Google Patents

Abstract

Provided herein is a microwave oven, comprising: a main body, the main body has a bearing wall opposite to a food carrier; a first waveguide is located outside the main body and is arranged on the bearing wall; microwaves are transmitted in a waveguide; and four first antenna devices are rotatably arranged on the bearing wall and offset from the center of the bearing wall, and are used for radiating the microwaves transmitted in the first waveguide into the main body. The microwaves generated by the microwave generating device are radiated into the main body by the four first antenna devices through the first waveguide, and act on the food carrier, so that the microwaves acting on the central area of the food carrier are relatively reduced and act on the edges of the food carrier The microwaves in the area are relatively increased. Compared with the use of one first antenna device, the microwave range radiated by four first antenna devices is also larger, and it is easier to achieve a uniform effect on the food carrier, which can improve the uniform heating of the food by the microwave oven. sex.

Description

a microwave oven

technical field

The invention relates to the field of electrical equipment, in particular to a microwave oven.

Background technique

The existing microwave oven includes a main body, a first magnetron, a second magnetron, a first waveguide, a second waveguide, a first antenna device, a second antenna device and a food carrier, the first magnetron, the second The magnetron, the first waveguide and the second waveguide are all arranged outside the main body, the first waveguide is arranged on the lower side wall of the main body (that is, the bearing wall), and the second waveguide is arranged on the upper side wall of the main body (that is, the second side wall), the first antenna device is arranged in the center of the lower side wall of the main body, the second antenna device is arranged in the center of the upper side wall of the main body, and the food carrier is located in the main body and placed on the lower side wall of the main body . In the working state of the microwave oven, the microwave generated by the first magnetron is radiated into the main body by the first antenna device through the first waveguide, and the microwave generated by the second magnetron is radiated into the main body by the second antenna device through the second waveguide. Heats the food placed on the food carrier. However, the heating uniformity of the food is not good.

SUMMARY OF THE INVENTION

The study found that the microwaves generated by the first magnetron are radiated to the food carrier by the first antenna device through the first waveguide. Since the distance between the lower side wall of the main body and the food carrier is very small, no matter what kind of antenna device is used, It is difficult to make the microwave radiated by the first antenna device evenly act on the food carrier, which is also the main reason why the heating uniformity of the food in the existing microwave oven is not good.

The main purpose of the present invention is to provide a microwave oven with better heating uniformity for food.

In order to achieve the above object, the microwave oven proposed by the embodiment of the present invention includes: a main body, the main body has a bearing wall opposite to the food carrier; a first waveguide is located outside the main body and is arranged on the bearing wall; a microwave a generating device, arranged outside the main body, for transmitting microwaves into the first waveguide; and four first antenna devices, rotatably arranged on the bearing wall and offset from the center of the bearing wall, for radiating microwaves transmitted in the first waveguide into the body.

In an exemplary embodiment, four of the first antenna devices are arranged symmetrically with respect to the axis of the bearing wall.

In an exemplary embodiment, the bearing wall is rectangular, and the four first antenna devices are offset from two diagonals of the bearing wall.

In an exemplary embodiment, the bearing wall is rectangular, and the four first antenna devices are located on two diagonal lines of the bearing wall.

In an exemplary embodiment, the bearing wall is rectangular, and the four first antenna devices are located in the four regions separated by the first central axis and the second central axis of the bearing wall in one-to-one correspondence, The first central axis is parallel to the long side of the bearing wall, and the second central axis is parallel to the broad side of the bearing wall.

In an exemplary embodiment, the first waveguide includes a first transmission segment, a second transmission segment, a third transmission segment, a fourth transmission segment, and a fifth transmission segment, the first transmission segment being along the first transmission segment. The central axis is arranged, the second transmission section and the third transmission section are located on one side of the first transmission section, and the fourth transmission section and the fifth transmission section are located on the other side of the first transmission section. On one side, the ends of the second transmission section, the third transmission section, the fourth transmission section and the fifth transmission section facing away from the first central axis correspond to four of the first transmission sections one-to-one In the antenna device, the ends of the second transmission section, the third transmission section, the fourth transmission section and the fifth transmission section facing the first central axis are communicated with the first transmission section.

In an exemplary embodiment, the first waveguide is provided with an impedance matching structure for matching the equivalent impedance of the four first antenna devices with the impedance of the microwave generating device.

In an exemplary embodiment, the impedance matching structure includes a first baffle, a second baffle, a third baffle, a fourth baffle and a fifth baffle, the first baffle being located on the first baffle one end of the transmission section away from the microwave generating device, the second baffle is located at the position where the second transmission section and the first transmission section are connected, and the third baffle is located in the third transmission section The position connected with the first transmission section, the fourth baffle is located at the position where the fourth transmission section is connected with the first transmission section, and the fifth baffle is located in the fifth transmission section The position connected to the first transmission segment.

In an exemplary embodiment, the side wall of the main body opposite to the bearing wall is a second side wall; the microwave oven further includes: a second waveguide, which is located outside the main body and is arranged on the second side wall. On the side wall, the microwave generating device is also used for transmitting microwaves into the second waveguide; and a second antenna device is rotatably arranged on the second side wall and is used for transmitting microwaves into the second waveguide. Microwaves are radiated into the body.

In an exemplary embodiment, the second waveguide is axially symmetric to the first waveguide, the number of the second antenna devices is the same as the number of the first antenna devices, and a plurality of the second antennas The device and the plurality of first antenna devices are axially symmetric.

In an exemplary embodiment, each of the first antenna device and the second antenna device includes a drive device and an antenna mounted on the drive device, the antenna includes a triangular shape, a circular shape, an elliptical shape, a rectangular shape, and a rectangular shape. One or more of shapes and odd shapes.

In an exemplary embodiment, the rotational speeds of the plurality of driving devices are not identical.

In an exemplary embodiment, the microwave generating device includes: a first magnetron, disposed corresponding to the first waveguide, for transmitting microwaves into the first waveguide; and a second magnetron, corresponding to It is arranged in the second waveguide and is used for transmitting microwaves into the second waveguide.

In the technical solution of the present invention, four first antenna devices are rotatably provided off-center on the bearing wall, and the microwaves generated by the microwave generating device are radiated into the main body by the four first antenna devices through the first waveguide, and act on the food carrier. In this way, the microwaves acting on the central region of the food carrier are relatively reduced, and the microwaves acting on the edge regions of the food carrier are relatively increased. Compared with the use of one first antenna device, the microwave range radiated by four first antenna devices is used. It is also larger, and it is easier to achieve a uniform effect on the food carrier, which can improve the uniformity of the microwave oven's heating of the food.

Description of drawings

In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention, and for those of ordinary skill in the art, other drawings can also be obtained according to the structures shown in these drawings without creative efforts.

FIG. 1 is a schematic three-dimensional structure diagram of a microwave oven according to an embodiment of the present invention from a viewing angle;

FIG. 2 is a schematic three-dimensional structure diagram of the microwave oven shown in FIG. 1 from another perspective;

FIG. 3 is a perspective view of the microwave oven shown in FIG. 1 after removing the food carrier;

FIG. 4 is a perspective structural schematic diagram of the first waveguide and the first antenna device in FIG. 2 after being assembled;

FIG. 5 is a partial schematic diagram of the three-dimensional structure from another perspective of the structure shown in FIG. 4;

FIG. 6 is a partial schematic diagram of the three-dimensional structure of the first waveguide in FIG. 2 from a viewing angle;

FIG. 7 is a schematic three-dimensional structural diagram of the structure shown in FIG. 6 from another perspective;

FIG. 8 is a perspective structural schematic diagram of the second waveguide and the second antenna device in FIG. 2 after being assembled;

FIG. 9 is a schematic three-dimensional structure diagram of the structure shown in FIG. 8 from another perspective.

Among them, the corresponding relationship between the reference numerals and the component names in Fig. 1 to Fig. 9 is:

100 main body, 110 carrying wall, 120 second side wall, 130 scattering structure, 200 food carrier, 300 first waveguide, 310 first transmission section, 320 second transmission section, 321 fourth transmission section, 330 third transmission section , 331 fifth transmission section, 340 first baffle, 350 second baffle, 360 third baffle, 370 fourth baffle, 380 fifth baffle, 400 microwave generator, 410 first magnetron, 420 Second magnetron, 500 first antenna device, 510 driving device, 520 antenna, 600 second antenna device, 610 driving device, 620 antenna, 700 second waveguide, 710 spherical structure.

The realization, functional characteristics and advantages of the present invention will be further described with reference to the accompanying drawings in conjunction with the embodiments.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relationship between various components under a certain posture (as shown in the accompanying drawings). The relative positional relationship, the movement situation, etc., if the specific posture changes, the directional indication also changes accordingly.

In addition, descriptions such as "first", "second", etc. in the present invention are only for descriptive purposes, and should not be construed as indicating or implying their relative importance or implicitly indicating the number of indicated technical features. Thus, a feature delimited with "first", "second" may expressly or implicitly include at least one of that feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise expressly and specifically defined.

In the present invention, unless otherwise expressly specified and limited, the terms "connected", "fixed" and the like should be understood in a broad sense, for example, "fixed" may be a fixed connection, a detachable connection, or an integrated; It can be a mechanical connection or an electrical connection; the "connection" can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal communication between two elements or the interaction relationship between the two elements, unless otherwise expressly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but must be based on the realization by those of ordinary skill in the art. When the combination of technical solutions is contradictory or cannot be achieved, it should be considered that the combination of technical solutions does not exist and is not within the scope of protection claimed by the present invention.

As shown in FIG. 1 to FIG. 7 , the microwave oven proposed by the embodiment of the present invention includes: a main body 100 having a bearing wall 110 opposite to the food carrier 200 (ie, the lower side wall of the main body 100 ); a first waveguide 300 , located outside the main body 100 and arranged on the bearing wall 110; a microwave generating device 400, arranged outside the main body 100, for transmitting microwaves into the first waveguide 300; and four first antenna devices 500, rotatably arranged on The carrier wall 110 is deviated from the center of the carrier wall 110 for radiating microwaves transmitted in the first waveguide 300 into the main body 100 .

In the microwave oven, four first antenna devices 500 are rotatably disposed off-center on the bearing wall 110, and the microwaves generated by the microwave generating device 400 are radiated into the main body 100 by the four first antenna devices 500 through the first waveguide 300, and act on On the food carrier 200, the microwaves acting on the central area of the food carrier 200 are relatively reduced, and the microwaves acting on the side areas of the food carrier 200 are relatively increased. Compared with the use of one first antenna device 500, four antenna devices are used. The microwave range radiated by an antenna device 500 is also larger, and it is easier to achieve a uniform effect on the food carrier 200, which can improve the heating uniformity of the microwave oven to the food.

In an example, as shown in FIG. 2 to FIG. 7 , the four first antenna devices 500 are arranged symmetrically with respect to the axis of the bearing wall 110 , which better improves the uniformity of microwave radiation from the four first antenna devices 500 , so that the four first antenna devices 500 radiate microwaves. The microwaves radiated by the first antenna device 500 act on the food carrier plate 200 more uniformly, so that the microwave oven heats the food more uniformly.

In an example, as shown in FIG. 2 to FIG. 5 , the four first antenna devices 500 are evenly arranged on the bearing wall 110 , so that the microwaves radiated by the four first antenna devices 500 have a larger range, and the microwaves can be better The uniform effect on the food carrier 200 can be achieved, which can further improve the uniformity of the microwave oven heating the food.

It can be that the bearing wall 110 is rectangular, the four first antenna devices 500 are located on two diagonal lines of the bearing wall 110, and the arrangement positions of the four first antenna devices 500 on the two diagonal lines can be determined according to simulation, Reasonable settings are made by means of experiments or calculations, so that the microwaves radiated by the four first antenna devices 500 act on the food carrier 200 more uniformly;

Alternatively, as shown in FIG. 3 , the supporting wall 110 is rectangular, the four first antenna devices 500 are deviated from the two diagonal lines of the supporting wall 110 , and the four first antenna devices 500 may be the first antenna device 500 deviated from the supporting wall 110 . A central axis and a second central axis, the four first antenna devices 500 may also be located on the first central axis and the second central axis of the bearing wall 110 (not shown in the figure), and the first central axis is connected to the bearing wall 110. 110 is an axis parallel to the long side, the second central axis is an axis parallel to the broad side of the bearing wall 110, the positions of the four first antenna devices 500 can be reasonably set by means of simulation, experiment or calculation, etc., so that The microwaves radiated by the four first antenna devices 500 act on the food carrier 200 more uniformly;

All of the above can achieve the purpose of the present application, the purpose of which does not deviate from the design idea of the present invention, and will not be repeated here, but all belong to the protection scope of the present application.

In one embodiment, as shown in FIG. 2 and FIG. 3 , the bearing wall 110 has a rectangular shape, the first central axis and the second central axis divide the bearing wall 110 into four regions, and the four first antenna devices 500 are one by one. Correspondingly located in the four regions, the microwaves acting on the central region of the food carrier 200 are relatively reduced, and the microwaves acting on the side regions of the food carrier 200 are relatively increased, and the microwaves can be applied to the food carrier 200 more uniformly. Therefore, Microwave ovens heat food more evenly.

In one embodiment, as shown in FIGS. 2 , 4 to 7 , the first waveguide 300 includes a first transmission section 310 , a second transmission section 320 , a third transmission section 330 , a fourth transmission section 321 and a fifth transmission section Segment 331, the first transmission segment 310 is arranged along the first central axis, the second transmission segment 320 and the third transmission segment 330 are located on one side of the first transmission segment 310, and the fourth transmission segment 321 and the fifth transmission segment 331 are located at the first transmission segment 331. On the other side of the transmission section 310, the second transmission section 320 and the fourth transmission section 321 are symmetrically arranged about the first central axis, the third transmission section 330 and the fifth transmission section 331 are symmetrically arranged about the first central axis, and the second transmission section 320 and the third transmission section 330 are symmetrically arranged with respect to the second central axis, and the fourth transmission section 321 and the fifth transmission section 331 are arranged symmetrically with respect to the second central axis. The ends of the second transmission section 320 , the third transmission section 330 , the fourth transmission section 321 and the fifth transmission section 331 facing away from the first transmission section 310 correspond to the four first antenna devices 500 one by one, and the second transmission section The ends of the 320 , the third transmission section 330 , the fourth transmission section 321 and the fifth transmission section 331 facing the first transmission section 310 are all communicated with the first transmission section 310 .

As shown in FIG. 2 to FIG. 5 , each of the first antenna devices 500 includes a driving device 510 and an antenna 520 mounted on the driving device 510. The rotation speeds of the four driving devices 510 are not exactly the same, so that the uniformity of microwave distribution can be improved. . . The four driving devices 510 are fixed to one end of the second transmission section 320 , the third transmission section 330 , the fourth transmission section 321 and the fifth transmission section 331 away from the first central axis in a one-to-one correspondence, and are all set as motors. The size of the antennas 520 should be designed to be relatively small to prevent the edges of adjacent antennas 520 from being too close to cause sparks during rotation. The antenna 520 is in one or more of a triangular shape, a circular shape, an elliptical shape, a rectangular shape and a different shape, etc. Different shapes of the antenna 520 not only have different patterns, but also have different effects on heating uniformity in different cavities. , those skilled in the art can better design the shape of the antenna 520 by means of simulation, experiment or calculation, all of the above can achieve the purpose of the application, its purpose does not depart from the design idea of the present invention, and will not be repeated here. All should fall within the protection scope of this application.

In an exemplary embodiment, as shown in FIGS. 5 and 6 , the first waveguide 300 is provided with an impedance matching structure, and the impedance matching structure is used to make the equivalent impedance of the four first antenna devices The impedances are matched to ensure that the microwaves emitted by the microwave generating device 400 can smoothly enter the main body 100 through the two first antenna devices 500 .

In an exemplary embodiment, as shown in FIGS. 5 and 6 , the impedance matching structure includes a first baffle 340 , a second baffle 350 , a third baffle 360 , a fourth baffle 370 and a fifth baffle 380 , the first baffle 340 is located at the end of the first transmission section 310 away from the microwave generating device 400 and protrudes toward the end of the first transmission section 310 adjacent to the microwave generating device 400 , and the second baffle 350 is located at the second transmission section 320 The position connected to the first transmission section 310 is far from the first baffle 340, and the third baffle 360 is located at the position where the third transmission section 330 is connected to the first transmission section 310, and is far away from the first baffle 340. The four baffles 370 are located at the position where the fourth transmission section 321 and the first transmission section 310 are connected and away from the first baffle 340 , and the fifth baffle 380 is located at the position where the fifth transmission section 331 and the first transmission section 310 are connected , and away from the first baffle 340, the size and position of the first baffle 340, the size and position of the second baffle 350, the size and position of the third baffle 360, the size and position of the fourth baffle 370, and the The size and position of the five baffles 380 can be better designed through simulation, experiment or calculation, all of which can achieve the purpose of the present application. It belongs to the protection scope of this application.

In an exemplary embodiment, as shown in FIGS. 1 , 8 and 9 , the side wall of the main body 100 opposite to the bearing wall 110 is the second side wall 120 (ie, the upper side wall of the main body 100 ). The microwave oven further includes: a second waveguide 700, located outside the main body 100 and disposed on the second side wall 120, the microwave generating device 400 is also used for transmitting microwaves into the second waveguide 700; and a second antenna device 600, rotatably It is disposed on the second side wall 120 and is used for radiating microwaves transmitted in the second waveguide 700 into the main body 100 .

It may be that, as shown in FIG. 1 , the second antenna device 600 is disposed at the center of the second side wall 120 ; or it may be that the second waveguide 700 is axially symmetric with the first waveguide 300 , and the number of the second antenna devices 600 is equal to that of the first waveguide 300 . The number of the first antenna devices 500 is the same, and the plurality of second antenna devices 600 and the plurality of first antenna devices 500 are arranged in axisymmetric (not shown in the figure), etc. The above can achieve the purpose of the present application. The purpose does not deviate from the design idea of the present invention, and will not be repeated here, but all belong to the protection scope of the present application.

In an embodiment, as shown in FIG. 8 and FIG. 9 , the second antenna device 600 includes a driving device 610 and an antenna 620 mounted on the driving device 610. The driving device 610 is fixed on the second waveguide 700 and is set to motor. The antenna 620 is in one or more of a triangular shape, a circular shape, an elliptical shape, a rectangular shape and a different shape. Different shapes of the antenna 620 not only have different patterns, but also have different effects on heating uniformity in different cavities. Those skilled in the art can better design the shape of the antenna 620 by means of simulation, experiment or calculation, all of which can achieve the purpose of the present application. should fall within the scope of protection of this application.

In one embodiment, as shown in FIG. 9 , the second waveguide 700 is also provided with a spherical structure 710 for matching and blocking. The spherical structure 710 protrudes toward the inside of the second waveguide 700 , and the function of the spherical structure 710 is to make the second antenna The equivalent impedance of the device 600 matches the impedance of the microwave generating device 400 to ensure that the microwaves emitted by the microwave generating device 400 can smoothly enter the main body 100 through the two second antenna devices 600 .

In one embodiment, as shown in FIG. 2 to FIG. 4 and FIG. 8 , the microwave generating device 400 includes: a first magnetron 410 , which is arranged corresponding to the first waveguide 300 and is used for transmitting microwaves into the first waveguide 300 , The function of the cylindrical surface 340 is to match the equivalent impedance of the two first antenna devices 500 with the impedance of the first magnetron 410 to ensure that the microwaves emitted by the first magnetron 410 can pass through the two first antenna devices 500 successfully enter the main body 100; and the second magnetron 420, which is arranged corresponding to the second waveguide 700 and is used to transmit microwaves into the second waveguide 700. The function of the spherical structure 710 is to make the equivalent impedance of the second antenna device 600 equal to The impedances of the second magnetron 420 are matched to ensure that the microwaves emitted by the second magnetron 420 can smoothly enter the main body 100 through the second antenna device 600 .

Of course, the microwave generating device 400 can also be a magnetron, and the microwave can be transmitted into the first waveguide and the second waveguide through a magnetron, and the purpose of this application can also be achieved. It will not be repeated here, and it is also used within the protection scope of the present application.

In one embodiment, as shown in FIG. 1 to FIG. 3 , the inner wall of the main body 100 is provided with scattering structures 130 arranged in a matrix, and the scattering structures 130 are spherical convex hull, spherical concave, ellipsoidal convex hull, ellipsoidal surface One or more of the concave and pyramid, etc., the scattering structure 130 can scatter microwaves more uniformly in all directions, which can further improve the uniformity of microwave distribution in the main body 100 .

For example, each inner wall of the main body 100 is covered with scattering structures 130 .

For example, the volume of the main body 100 is not less than 17 liters, the inner wall of the main body 100 is made of a 304 stainless steel plate with a thickness of 0.5-1 mm, and the first waveguide 300 and the second waveguide 700 are made of a steel plate with a thickness of 0.5-1 mm.

To sum up, in the technical solution of the present invention, four first antenna devices are rotatably provided off-center on the bearing wall, and the microwaves generated by the microwave generating device are radiated into the main body by the four first antenna devices through the first waveguide. and act on the food carrier, so that the microwaves acting on the central area of the food carrier are relatively reduced, and the microwaves acting on the edge area of the food carrier are relatively increased. Compared with the use of one first antenna device, four first antennas are used. The microwave range radiated by the device is also larger, and it is easier to achieve a uniform effect on the food carrier, which can improve the heating uniformity of the microwave oven to the food.

In the description of the present invention, it should be noted that the terms "upper", "lower", "one side", "the other side", "one end", "the other end", "side", "opposite", The orientation or positional relationship indicated by "four corners", "periphery", "mouth structure", etc. are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying The structures referred to have specific orientations, are constructed and operate in specific orientations and are therefore not to be construed as limitations of the invention.

In the description of the embodiments of the present invention, unless otherwise expressly specified and limited, the terms "connection", "direct connection", "indirect connection", "fixed connection", "installation" and "assembly" should be understood in a broad sense, For example, it may be a fixed connection, a detachable connection, or an integral connection; the terms "installation", "connection" and "fixed connection" may be directly connected or indirectly connected through an intermediate medium, and may be two elements Internal connectivity. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific situations.

Although the embodiments disclosed in the present invention are as above, the described contents are only the embodiments adopted to facilitate the understanding of the present invention, and are not intended to limit the present invention. Any person skilled in the art to which the present invention belongs, without departing from the spirit and scope disclosed by the present invention, can make any modifications and changes in the form and details of the implementation, but the scope of the patent protection of the present invention still needs to be as defined by the appended claims.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the scope of the present invention. Under the conception of the present invention, the equivalent structural transformations made by the contents of the description and accompanying drawings of the present invention, or directly/indirectly applied in Other related technical fields are included within the scope of patent protection of the present invention.

Claims (12)

1. a microwave oven, is characterized in that, comprises: a body having a load-bearing wall opposite the food-carrying plate; a first waveguide, located outside the main body and arranged on the bearing wall; a microwave generating device, disposed outside the main body, for transmitting microwaves into the first waveguide; and Four first antenna devices are rotatably arranged on the bearing wall and are offset from the center of the bearing wall, and are used for radiating microwaves transmitted in the first waveguide into the main body. 2 . The microwave oven according to claim 1 , wherein the four first antenna devices are arranged symmetrically with respect to the axis of the bearing wall. 3 . 3. The microwave oven according to claim 1, characterized in that, The bearing wall is rectangular, and the four first antenna devices are offset from two diagonals of the bearing wall; or The bearing wall is rectangular, and the four first antenna devices are located on two diagonal lines of the bearing wall. 4 . The microwave oven according to claim 1 , wherein the supporting wall is rectangular, and the four first antenna devices are located in a one-to-one correspondence between the first central axis and the second central axis of the supporting wall. 5 . In the four out regions, the first central axis is parallel to the long side of the bearing wall, and the second central axis is parallel to the broad side of the bearing wall. 5. The microwave oven of claim 4, wherein the first waveguide comprises a first transmission section, a second transmission section, a third transmission section, a fourth transmission section and a fifth transmission section, the first transmission section The transmission section is arranged along the first central axis, the second transmission section and the third transmission section are located on one side of the first transmission section, and the fourth transmission section and the fifth transmission section are located at the other side. The other side of the first transmission section, the ends of the second transmission section, the third transmission section, the fourth transmission section and the fifth transmission section facing away from the first central axis, one by one Corresponding to the four first antenna devices, the ends of the second transmission section, the third transmission section, the fourth transmission section and the fifth transmission section facing the first central axis are the same as the first The transmission segment is connected. 6 . The microwave oven according to claim 5 , wherein the first waveguide is provided with an impedance matching structure, and the impedance matching structure is used to make the equivalent impedance of the four first antenna devices and the microwave The impedance of the generator is matched. 7. The microwave oven according to claim 6, wherein the impedance matching structure comprises a first baffle, a second baffle, a third baffle, a fourth baffle and a fifth baffle, the first baffle A baffle is located at one end of the first transmission section away from the microwave generating device, the second baffle is located at a position where the second transmission section and the first transmission section are connected, and the third baffle at the position where the third transmission section and the first transmission section are connected, the fourth baffle is at the position where the fourth transmission section and the first transmission section are connected, and the fifth baffle at the position where the fifth transmission section and the first transmission section are connected. 8. The microwave oven according to any one of claims 1 to 7, wherein the side wall opposite to the bearing wall on the main body is a second side wall; the microwave oven further comprises: a second waveguide, located outside the main body and disposed on the second side wall, the microwave generating device is also used for transmitting microwaves into the second waveguide; and The second antenna device is rotatably disposed on the second side wall, and is used for radiating microwaves transmitted in the second waveguide into the main body. 9 . The microwave oven according to claim 8 , wherein the second waveguide is axially symmetric to the first waveguide, the number of the second antenna devices is the same as the number of the first antenna devices, and The plurality of second antenna devices and the plurality of first antenna devices are axially symmetric. 10. The microwave oven according to claim 8, wherein the first antenna device and the second antenna device both comprise a driving device and an antenna mounted on the driving device, and the antenna comprises a triangular, One or more of round shape, oval shape, rectangular shape and special shape. 11 . The microwave oven according to claim 10 , wherein the rotational speeds of the plurality of driving devices are not identical. 12 . 12. The microwave oven according to claim 8, wherein the microwave generating device comprises: a first magnetron, disposed corresponding to the first waveguide, for transmitting microwaves into the first waveguide; and A second magnetron, disposed corresponding to the second waveguide, is used for transmitting microwaves into the second waveguide.

Images