Waveguide assembly and microwave system for a microwave oven

Abstract

The utility model belongs to the technical field of microwave oven, especially point to a waveguide subassembly and microwave system in microwave oven of microwave oven, include: waveguide box, the waveguide box in shape has the inclined first waveguide channel and horizontal second waveguide channel in proper order, the first waveguide channel has the microwave import for connecting microwave generator subassembly, the second waveguide channel is equipped with microwave export, the waveguide box includes the waveguide upper cover and waveguide lower plate of being connected, and the waveguide upper cover and waveguide lower plate are connected through the form of welding. The patent is manufactured waveguide box through the mode of welding, compares the waveguide box that the existing through the bending cladding technology manufactures, and the waveguide box that welds is better, will not produce the condition of wave leakage, and, through setting up the welding ring edge provides enough welding space for laser welding, makes the waveguide upper cover and waveguide lower plate weld more closely, further reduces the condition of wave leakage to produce.

Description

Technical Field

[0001] This utility model belongs to the field of microwave oven technology, specifically referring to a waveguide component in a microwave oven and a microwave system for microwave ovens. Background Technology

[0002] The waveguide system of a conventional microwave oven typically consists of a rectangular metal waveguide, a coupling antenna, and a reflecting cavity, usually installed between the magnetron outlet and the oven cavity sidewall. The 2.45 GHz microwaves generated by the magnetron are fed into the waveguide via the coupling antenna, utilizing the principle of total internal reflection within the metal wall for directional microwave transmission, preventing energy loss. The waveguide outlet faces the oven cavity and is equipped with a mode stirrer or turntable, ensuring uniform microwave scattering throughout the food. This structure ensures efficient energy transfer and prevents microwave leakage, making it a crucial component connecting the microwave source and the heating cavity.

[0003] Referring to a microwave feeding system disclosed in Chinese invention patent application 2017800398400, which achieves directional microwave transmission through a rectangular waveguide, existing waveguides are limited by the internal installation structure of microwave ovens. This necessitates the use of irregularly shaped waveguides to adapt to the complex assembly structure of microwave ovens, rather than the existing ordinary rectangular structure. Irregularly shaped waveguides require precise control of the distance between the antenna on the microwave generator and the inner wall of the waveguide. Furthermore, irregularly shaped waveguides are often manufactured using a bending and covering process. While this process is relatively simple, it is unreliable and prone to wave leakage. Summary of the Invention

[0004] The purpose of this invention is to provide a waveguide assembly that is more compatible with the internal installation structure of a microwave oven and a microwave system for microwave ovens.

[0005] The purpose of this utility model is achieved as follows:

[0006] Waveguide components, including:

[0007] A waveguide box, wherein an inclined first waveguide channel and a horizontal second waveguide channel are sequentially formed inside the waveguide box, the first waveguide channel having a microwave inlet for connecting a microwave generator assembly, and the second waveguide channel having a microwave outlet;

[0008] The waveguide box includes a waveguide upper cover and a waveguide lower plate connected together, and the waveguide upper cover and the waveguide lower plate are connected by welding.

[0009] Furthermore, the first waveguide channel is also provided with a waveguide clearance groove opposite to the microwave generation direction of the microwave generator assembly, which is used to keep the antenna on the microwave generator assembly at a safe distance from the inner wall of the first waveguide channel.

[0010] Furthermore, the outer edges of the waveguide upper cover and the waveguide lower plate are provided with welding ring edges. When the waveguide upper cover and the waveguide lower plate are connected, the welding ring edges on the waveguide upper cover and the waveguide lower plate abut against each other and are connected by welding.

[0011] Furthermore, it also includes a tuning rod, which is made of metal and fixed in the second waveguide channel. The tuning rod is used to increase the capacitive reactance in the waveguide box to counteract the inductive reactance in the microwave generator assembly.

[0012] Furthermore, the length of the tuning rod extending into the second waveguide channel is 9mm-13mm.

[0013] A microwave system for a microwave oven, comprising:

[0014] Microwave generator assembly, used to generate microwaves;

[0015] The aforementioned waveguide assembly, connected to the microwave generator assembly, is used to guide microwaves; and

[0016] A wave-stirring component is connected to the waveguide component.

[0017] Furthermore, the wave-stirring component includes:

[0018] A wave-stirring driver is fixed to the waveguide box;

[0019] A wave-stirring rod is inserted into the microwave outlet and rotated by the wave-stirring drive component; and

[0020] A wave stirrer is connected to the wave stirrer rod and located outside the microwave outlet; the wave stirrer is driven to rotate by the wave stirrer rod.

[0021] Furthermore, the wave-stirring drive component includes a wave-stirring motor, which drives a first wave-stirring drive plate to rotate; one end of the wave-stirring rod is provided with a second wave-stirring drive plate that intersects with the first wave-stirring drive plate, which is used to drive the wave-stirring rod to rotate by the first wave-stirring drive plate and the second wave-stirring drive plate abutting against each other.

[0022] Furthermore, the second wave-driving plate includes a torsion spring, which is fitted onto the wave-driving rod. One end of the torsion spring is connected to the wave-driving rod, and the other end extends outward to intersect with the first wave-driving plate.

[0023] Furthermore, the stirrer includes:

[0024] The rotating rod is rotatably mounted within the waveguide housing; and

[0025] An extension sleeve is fitted onto one end of the rotating rod and the other end is connected to the stirring plate. The extension sleeve and the rotating rod are provided with a plurality of sliding positioning holes for fixing the rotating rod and the extension sleeve by inserting a sliding positioning rod through the sliding positioning holes.

[0026] The outstanding and beneficial technical effects of this utility model compared to the prior art are:

[0027] 1. Existing microwave generator assemblies generally have a certain height, while the waveguide box in this patent generally needs to be attached to the outer shell. Therefore, an inclined first waveguide channel is set to compensate for the height difference between the microwave generator assembly and the second waveguide channel, thereby eliminating the need to adjust the structure of the microwave generator assembly and reducing manufacturing difficulty.

[0028] 2. This patent avoids the outer wall of the waveguide cover from getting too close to the antenna by setting the waveguide clearance groove, so that the antenna and the inner wall of the waveguide box are kept at a safe distance, thereby preventing the generation of electric arcs or interference with the normal transmission of microwaves due to the two being too close.

[0029] 3. This patent manufactures waveguide boxes by welding. Compared with existing waveguide boxes manufactured by bending and covering processes, the welded waveguide box has better sealing performance and will not produce wave leakage. Furthermore, by setting the welding ring edge, sufficient welding space is provided for laser welding, so that the waveguide top cover and the waveguide bottom plate are welded more tightly, further reducing the occurrence of wave leakage. Attached Figure Description

[0030] Figure 1 This is a structural diagram of an oven.

[0031] Figure 2 This is a diagram showing the inner and outer chambers of an oven.

[0032] Figure 3 This is a schematic diagram of the microwave system installation.

[0033] Figure 4 This is a schematic diagram showing the connection between the microwave system and the inner liner.

[0034] Figure 5 yes Figure 4 A schematic diagram of the cross-section of the middle waveguide component.

[0035] Figure 6 This is a diagram showing the disassembled microwave heat dissipation bracket.

[0036] Figure 7 This is a schematic diagram showing the disassembly of the waveguide box.

[0037] Figure 8 This is a schematic diagram of the inner structure of the waveguide box.

[0038] Figure 9This is a schematic diagram of the wave stirring component.

[0039] Figure 10 This is a cross-sectional schematic diagram of the wave stirring component.

[0040] The meaning of the labels in the diagram:

[0041] 2. Frame; 21. Inner chamber; 211. Wave stirrer; 212. Wave stirrer cavity; 213. Inner cavity; 22. Outer chamber;

[0042] 3. Microwave heat dissipation bracket; 33. Heat dissipation duct; 34. Heat dissipation fan; 35. Heat dissipation bracket base; 36. Heat dissipation bracket top cover;

[0043] 4. Microwave generator assembly; 41. Frequency converter; 42. Magnetron; 421. Mounting housing; 422. Magnetron assembly; 425. Antenna;

[0044] 5. Waveguide assembly; 51. Waveguide box; 511. First waveguide channel; 5111. Microwave inlet; 512. Second waveguide channel; 513. Tuning rod; 514. Waveguide clearance groove; 515. Microwave outlet; 516. Waveguide top cover; 517. Waveguide bottom plate; 518. Welding ring edge;

[0045] 6. Wave stirring assembly; 61. Wave stirring drive component; 611. Wave stirring motor; 612. First wave stirring drive plate; 613. Second wave stirring drive plate; 62. Wave stirring rod; 621. Rotating rod part; 622. Extension sleeve; 623. Sliding positioning hole; 624. Sliding positioning rod; 63. Wave stirring plate; 631. Wave stirring protrusion; 64. Wave-transparent sealing plate; 641. Sealing plate fixing ring; 6411. Relief groove; 642. Sealing plate sealing component; 6421. First retaining edge; 6422. Second retaining edge;

[0046] 7. Steam heating system; 8. Microwave system;

[0047] 9. Baking system; 91. Rack cooling fan; Detailed Implementation

[0048] The present invention will be further described below with reference to specific embodiments:

[0049] A microwave system for a microwave oven, used in a microwave oven, combined with Figure 1 , 2As shown, the microwave oven includes a frame 2, within which are an inner cavity 21 and an outer cavity 22. One side of the inner cavity 21 is open, with a door for closing it. The inner cavity 21 has an inner cavity 213 for placing food, and heating components are mounted on its exterior. The outer cavity 22 is located above the inner cavity 21 and is fixedly connected to the frame 2. A steam heating system 7 for generating steam, a baking system 9 for raising the temperature, and a microwave system 8 are also provided outside the inner cavity 21. These systems are typically mounted on the outer cavity 22 or the frame 2.

[0050] Specifically, the microwave system 8 in this patent includes a microwave heat dissipation bracket 3, a microwave generator assembly 4, a waveguide assembly 5, a wave stirrer assembly 6, and a cooling fan 34. Combined with... Figure 3 , 4 As shown, the entire microwave system 8 in this patent is installed on one side of the outer shell 22. A rack cooling fan 91 is provided at the center of the outer shell 22. The rack cooling fan 91 operates to generate airflow to dissipate heat from the outer shell 22 and the inner shell 21 inside the rack 2, preventing the electrical components located outside the inner shell 21 from operating at a high temperature. The microwave heat dissipation bracket 3 is installed on one side of the rack cooling fan 91. The microwave heat dissipation bracket 3 in this patent includes a heat dissipation bracket base 35 and a heat dissipation bracket top cover 36. The heat dissipation bracket base 35 is used to fix the outer shell 22, and the heat dissipation bracket top cover 36 is fixed to the heat dissipation bracket base 35. The heat dissipation air duct 33 is formed between the heat dissipation bracket base 35 and the heat dissipation bracket top cover 36.

[0051] The microwave generator assembly 4 described in this patent includes a frequency converter 41 and a magnetron 42 connected together. The frequency converter 41 and the magnetron 42 are arranged sequentially along the microwave heat dissipation bracket 3. The magnetron 42 specifically includes a mounting housing 421, a magnetron assembly 422 disposed within the mounting housing 421, and an antenna 425 located at one end of the mounting housing 421. The mounting housing 421 supports the magnetron assembly 422 located within the mounting housing 421. During operation, the magnetron assembly 422 generates microwaves and transmits them outward through the antenna 425. The frequency converter 41 is used to control the operating frequency of the magnetron 42 to obtain microwaves of a specified frequency. The magnetic control assembly 422 generally includes a cathode, an anode, and a permanent magnet disposed within the mounting housing. The cathode is used to heat and generate electrons, and to make the electrons rotate between the anode and the permanent magnet to generate microwaves. The antenna 425 is connected to one side of the mounting housing 421 and is connected to the magnetic control assembly 422 inside the mounting housing 421. The microwaves generated between the cathode, anode, and permanent magnet are emitted outward from the antenna 425.

[0052] Furthermore, the waveguide assembly 5 includes a waveguide box 51. The waveguide assembly 5 is connected to the antenna 425 of the magnetron 42. The waveguide box 51 includes a waveguide upper cover 516 and a waveguide lower plate 517. The waveguide upper cover 516 and the waveguide lower plate 517 are formed by stretching and then welded together to form the waveguide box 51. During the stretching process, corresponding shapes are formed in advance so that the outer contour of the waveguide box 51 is formed after welding. Specifically, as shown... Figure 5 , 7 As shown in Figure 8, the waveguide box 51 is sequentially formed with an inclined first waveguide channel 511 and a horizontal second waveguide channel 512. Correspondingly, one end of the waveguide upper cover 516 and the waveguide lower plate 517 are inclined, and the other end is horizontal, so that the two are welded together to form the inclined first waveguide channel 511 and the horizontal second waveguide channel 512. The first waveguide channel 511 is provided with a microwave inlet 5111. The antenna 425 passes through the microwave inlet 5111 and is located in the first waveguide channel 511. The microwave emitted by the microwave generator assembly 4 first enters the first waveguide channel 511 and then enters the second waveguide channel 512. The purpose of setting the inclined first waveguide channel 511 is that the microwave generator assembly 4 generally has a certain height, while the waveguide box 51 generally needs to be attached to the outer shell 22. Therefore, the inclined first waveguide channel 511 is set to compensate for the height difference between the microwave generator assembly 4 and the second waveguide channel 512, thereby eliminating the need to adjust the structure of the microwave generator assembly 4 and reducing manufacturing difficulty.

[0053] Furthermore, the first waveguide channel 511 is also provided with a waveguide clearance groove 514 opposite to the microwave generation direction of the microwave generator assembly 4. For example... Figure 8 As shown, the waveguide clearance groove 514 is formed on the waveguide cover 516 of the waveguide box 51, specifically a right-angled groove structure. The main purpose of setting the waveguide clearance groove 514 is to avoid the outer wall of the waveguide cover 516 from getting too close to the antenna 425, so that the antenna 425 and the inner wall of the waveguide box 51 are kept at a safe distance, thereby preventing arcing or interference with the normal transmission of microwaves due to the two being too close.

[0054] Furthermore, the outer edges of the waveguide upper cover 516 and the waveguide lower plate 517 are provided with welding ring edges 518. For example... Figure 7 , 8The welding ring edge 518 is integrally formed on the outer edge of the waveguide upper cover 516 and the waveguide lower plate 517. When the waveguide upper cover 516 and the waveguide lower plate 517 are welded together, the waveguide upper cover 516 and the waveguide lower plate 517 are positioned vertically opposite each other, so that the welding ring edge 518 on the waveguide upper cover 516 and the waveguide lower plate 517 are in close contact. At this time, the connection is achieved by welding. The welding of the waveguide upper cover 516 and the waveguide lower plate 517 is generally performed by laser welding. By setting the welding ring edge 518, sufficient welding space is provided for laser welding, so that the welding of the waveguide upper cover 516 and the waveguide lower plate 517 is more tight, reducing the occurrence of wave leakage.

[0055] Furthermore, it also includes a tuning rod 513, which is fixed in the second waveguide channel 512, in conjunction with... Figure 7 , 8 As shown, the tuning rod 513 is a metal part, which is fixed to the upper side panel of the waveguide box 51 by welding the fasteners at the factory. The length of the tuning rod 513 extending into the second waveguide channel 512 is between 9mm and 13mm. Its function is to change the capacitive reactance in the waveguide box 51 so that the impedance matches the microwave generator assembly 4, thereby effectively eliminating reflected waves and achieving maximum power transmission.

[0056] Furthermore, the waveguide box 51 is provided with a microwave outlet 515, and correspondingly, the wave stirring assembly 6 includes a wave stirring drive 61, a wave stirring rod 62, and a wave stirring plate 63. Specifically, as follows... Figure 5-8 As shown, the microwave outlet 515 is a circular opening formed in the second waveguide channel 512; the wave stirrer 62 is rotatably mounted in the upper panel of the waveguide box 51 via a bearing, and the lower end of the wave stirrer 62 passes through the microwave outlet 515; the wave stirrer drive 61 includes a wave stirrer motor 611, which drives a first wave stirrer drive plate 612; one end of the wave stirrer 62 is provided with a second wave stirrer drive plate 613 intersecting with the first wave stirrer drive plate 612, which drives the wave stirrer 62 to rotate by the abutting of the first wave stirrer drive plate 612 and the second wave stirrer drive plate 613. The wave stirrer plate 63 is connected to the wave stirrer 62 and located outside the microwave outlet 515, and the wave stirrer plate 63 is driven to rotate by the wave stirrer 62.

[0057] For details, please refer to the following: Figure 5 , 6As shown, a wave-stirring bracket is provided outside the waveguide box 51, and a wave-stirring motor 611 is provided on the wave-stirring bracket. A vertically arranged first wave-stirring drive plate 612 is provided on the motor shaft of the wave-stirring motor 611. A horizontally arranged second wave-stirring drive plate 613 is provided on the end of the wave-stirring rod 62 exposed outside the waveguide box 51. The second wave-stirring drive plate 613 includes a torsion spring, which is fitted onto the end of the wave-stirring rod 62 exposed outside the waveguide box 51. One end of the torsion spring is connected to the wave-stirring rod 62 by a plug-in connection, and the other end extends outward to intersect with the first wave-stirring drive plate 612. At this time, the rotation of the wave-stirring motor 611 drives the first wave-stirring drive plate 612 to rotate, and the first wave-stirring drive plate 612 drives the second wave-stirring drive plate 613 to rotate, thereby causing the wave-stirring rod 62 to rotate, and the wave-stirring rod 62 drives the wave-stirring plate 63 located outside the microwave outlet 515 to rotate.

[0058] The stirring plate 63 is specifically a fan-shaped plate. In practice, the stirring plate 63 is located between the outer liner 22 and the inner liner 21, and a stirring section 211 is provided between the outer liner 22 and the inner liner 21 outside the stirring plate 63. Specifically, the top of the inner liner 21 arches upward and connects to the outer liner 22, forming a trapezoidal cross-section of the stirring section 211. A stirring cavity 212 is formed within the stirring section 211. The inlet end of the stirring section 211 connects to the microwave generator assembly 4, and the outlet end of the stirring section 211 connects to the inner cavity 213. The stirring plate 63 is rotatably mounted within the stirring section 211. Specifically, the lower end of the stirring rod 62 passes through the microwave outlet 515, and the stirring plate 63 is located within the stirring section. A wave-transparent sealing plate 64 is placed on the inner liner 21 at the end of the stirring section 211 to seal the stirring section 211. The stirring plate 63 is placed in the stirring section 211. When microwaves are emitted through the microwave generator assembly 4, they pass through the waveguide box 51 and are sent out through the microwave outlet 515 on the waveguide box 51, coming into contact with the stirring plate 63 in the stirring section 211. The rotation of the stirring plate 63 disperses the microwaves, which then pass through the wave-transparent sealing plate 64 and enter the inner liner 21 for heating. Microwaves are reflected back and forth in the sealed waveguide box 51, the stirring channel 211, and the inner liner, eventually "stuck" in certain fixed positions to form standing waves, resulting in uneven energy distribution. The metal stirring plate 63 continuously reflects microwaves as it rotates, and each reflection changes the electromagnetic boundary conditions of the sealed cavity, forcing the originally fixed standing wave mode to become unstable and constantly reorganizing into new standing wave modes, generating more modes of field waves. This disperses the hot spots in the original sealed cavity, i.e., the inner liner 21, to different positions, and the cold spots are repeatedly irradiated, ultimately making the microwave energy distribution in the entire inner liner 21 more uniform and the food heated more evenly.

[0059] This patent uses a first wave-driving plate 612 and a second wave-driving plate 613 to drive the wave-driving motor 611 to drive the wave-driving rod 62. Its advantage is that it is convenient to install the wave-driving motor 611 even if there is a slight error in the installation, which speeds up the installation speed of the wave-driving motor 611. At the same time, by setting the second wave-driving plate 613 as a torsion spring, the contact between the first wave-driving plate 612 and the second wave-driving plate 613 is smoother, so that the wave-driving rod 62 can rotate better.

[0060] Furthermore, the wave-stirring plate 63 is fan-shaped, with raised wave-stirring protrusions 631 on both sides of its fan-shaped edge. (Combined with...) Figure 9 , 10 As shown, one end of the wave-stirring plate 63 is fixed to the bottom of the wave-stirring rod 62 by fasteners. The wave-stirring plate 63 is directly manufactured into a fan shape by stamping and forms a raised wave-stirring protrusion 631. The wave-stirring protrusion 631 can better stir the waves when rotating, so that the microwave energy distribution in the inner liner 21 is more uniform.

[0061] Furthermore, the wave stirrer 62 includes a rotating rod portion 621 and an extension sleeve 622. The rotating rod portion 621 is rotatably mounted in the waveguide box 51 via a bearing. The extension sleeve 622 is sleeved on one end of the rotating rod portion 621. The extension sleeve 622 and the rotating rod are provided with a plurality of sliding positioning holes 623 for fixing the rotating rod portion 621 and the extension sleeve 622 by inserting sliding positioning rods 624 through the sliding positioning holes 623. The axial connection position between the rotating rod portion 621 and the extension sleeve 622 can be changed through the sliding positioning holes 623 and the sliding positioning rods 624, thereby changing the length of the wave stirrer 62 formed by the connection of the rotating rod portion 621 and the extension sleeve 622, thereby changing the position height of the wave stirrer 63, and thus changing the microwave reflection effect of the wave stirrer 63 to adapt to different kitchen appliance structures.

[0062] Furthermore, the wave-transparent sealing plate 64 is provided with a sealing plate fixing ring 641 for connecting with the inner liner 21, and a sealing plate sealing element 642 is provided between the sealing plate fixing ring 641 and the inner liner 21. Figure 5As shown, the sealing plate fixing ring 641 is fixed to the inner side of the inner liner 21 by fasteners. A groove is formed between the inner liner 21 and the sealing plate fixing ring 641 to hold the wave-transparent sealing plate 64. This groove is used to clamp the edge of the wave-transparent sealing plate 64, thus fixing it. A sealing plate sealing element 642 is provided at the bottom of this groove to seal the gap between the wave-transparent sealing plate 64, the sealing plate fixing ring 641, and the inner liner 21. This prevents water vapor in the inner liner 21 from leaking into the agitator assembly 6, affecting its normal operation, and increasing the stability of the oven described in this patent during operation. The sealing plate sealing element 642 can be made of silicone or rubber.

[0063] Furthermore, the sealing plate sealing member 642 has a first retaining edge 6421 and a second retaining edge 6422, the first retaining edge 6421 and the second retaining edge 6422 respectively abutting against the outer edge of the wave-transparent sealing plate 64 and a side surface of the wave-transparent sealing plate 64, such as... Figure 5 As shown, the sealing plate seal 642 in this patent has an "L" shaped cross section. It is fitted onto the outer edge of the wave-transparent sealing plate 64, so that the first baffle 6421 of the sealing plate seal 642 abuts against the outer edge of the wave-transparent sealing plate 64, and the second baffle 6422 abuts against one side surface of the wave-transparent sealing plate 64. At this time, the wave-transparent sealing plate 64 is clamped by the sealing plate fixing ring 641, and the sealing plate seal 642 is limited in the groove between the inner liner 21 and the sealing plate fixing ring 641. At this time, the first baffle 6421 and the second baffle 6422 form two seals in sequence, which can better prevent water vapor in the inner cavity 213 from entering the wave-stirring part 211 from the edge of the wave-transparent sealing plate 64.

[0064] Furthermore, the sealing plate fixing ring 641 has a relief groove 6411 on its edge, and the relief groove 6411 accommodates the first stop edge 6421 or the second stop edge 6422 of the sealing plate sealing member 642. Figure 5 As shown, the clearance groove 6411 is annular and is used to accommodate the second retaining edge 6422, so as to provide installation space for the installation of the second retaining edge 6422.

[0065] The above embodiments are merely preferred embodiments of the present utility model and are not intended to limit the scope of protection of the present utility model. Therefore, all equivalent changes made to the structure, shape, and principle of the present utility model should be covered within the scope of protection of the present utility model.

[0066] It should be understood that the structures, proportions, sizes, etc., depicted in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and are not intended to limit the scope of this invention. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of this invention, should still fall within the scope of the disclosed technical content. Furthermore, the terms "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and not intended to limit the scope of this invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of this invention.

[0067] It should also be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on the other component or may be connected to an intermediary component. When a component is referred to as being "connected to" another component, it can be directly connected to the other component or indirectly connected to the other component through an intermediary component.

[0068] Furthermore, the use of terms such as "first" and "second" in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed in this application.

Claims

1. A waveguide assembly, characterized in that, include: Waveguide box (51), wherein an inclined first waveguide channel (511) and a horizontal second waveguide channel (512) are sequentially formed inside the waveguide box (51). The first waveguide channel (511) has a microwave inlet (5111) for connecting to the microwave generator assembly (4), and the second waveguide channel (512) has a microwave outlet (515). The waveguide box (51) includes a waveguide upper cover (516) and a waveguide lower plate (517) connected to each other, and the waveguide upper cover (516) and the waveguide lower plate (517) are connected by welding.

2. A waveguide component according to claim 1, characterized in that: The first waveguide channel (511) is also provided with a waveguide clearance groove (514) opposite to the microwave generation direction of the microwave generator assembly (4), which is used to keep the antenna (425) on the microwave generator assembly (4) at a safe distance from the inner wall of the first waveguide channel (511).

3. A waveguide component according to claim 1, characterized in that: The outer edges of the waveguide upper cover (516) and the waveguide lower plate (517) are provided with welding ring edges (518). When the waveguide upper cover (516) and the waveguide lower plate (517) are connected, the welding ring edges (518) on the waveguide upper cover (516) and the waveguide lower plate (517) abut against each other and are connected by welding.

4. A waveguide assembly according to claim 1, characterized in that: It also includes a tuning rod (513), which is made of metal and fixed in the second waveguide channel (512). The tuning rod (513) is used to increase the capacitive reactance in the waveguide box (51) to counteract the inductive reactance in the microwave generator assembly (4).

5. A waveguide assembly according to claim 4, characterized in that: The length of the tuning rod (513) extending into the second waveguide channel (512) is 9mm-13mm.

6. A microwave system for a microwave oven, characterized in that, include: Microwave generator assembly (4), used to generate microwaves; The waveguide assembly (5) as described in any one of claims 1-5 is connected to the microwave generator assembly (4) and is used to guide microwaves; as well as The wave-stirring component (6) is connected to the waveguide component (5).

7. A microwave system for a microwave oven according to claim 6, characterized in that, The wave stirring component (6) includes: A wave-stirring drive (61) is fixed to the waveguide box (51); A wave-stirring rod (62) is inserted into the microwave outlet (515) and rotated by the wave-stirring drive (61); and A wave stirrer (63) is connected to the wave stirrer (62) and located outside the microwave outlet (515); the wave stirrer (63) is driven to rotate by the wave stirrer (62).

8. A microwave system for a microwave oven according to claim 7, characterized in that: The wave-stirring drive component (61) includes a wave-stirring motor (611), which drives a first wave-stirring drive plate (612) to rotate. One end of the wave-stirring rod (62) is provided with a second wave-stirring drive plate (613) that intersects with the first wave-stirring drive plate (612), which is used to drive the wave-stirring rod (62) to rotate by the first wave-stirring drive plate (612) and the second wave-stirring drive plate (613) abutting against each other.

9. A microwave system for a microwave oven according to claim 7, characterized in that: The second wave-driving plate (613) includes a torsion spring, which is fitted onto the wave-driving rod (62). One end of the torsion spring is connected to the wave-driving rod (62), and the other end extends outward to intersect with the first wave-driving plate (612).

10. A microwave system for a microwave oven according to claim 6, characterized in that, The stir bar (62) includes: The rotating rod (621) is rotatably disposed within the waveguide box (51); and An extension sleeve (622) is fitted onto one end of the rotating rod (621), and the other end is connected to the wave stirrer (63). The extension sleeve (622) and the rotating rod are provided with a plurality of sliding positioning holes (623) for fixing the rotating rod (621) and the extension sleeve (622) by inserting a sliding positioning rod (624) through the sliding positioning hole (623).

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