Microwave oven

Abstract

The utility model provides a microwave oven which comprises an oven cavity assembly and an air inlet structure, the air inlet structure is arranged below the front side of the oven cavity assembly, a first magnetron, a second magnetron and an electric control structure are arranged below the oven cavity assembly, a first heat dissipation structure is arranged on the side portion of the first magnetron, and a second heat dissipation structure is arranged on the side portion of the second magnetron. A second heat dissipation structure is arranged on the side portion of the second magnetron, and the electric control structure is arranged between the inlet end of the first heat dissipation structure or the second heat dissipation structure and the air inlet structure. According to the microwave oven, the first magnetron and the second magnetron can be cooled at the same time, and the heating efficiency and the heat dissipation performance of the microwave oven are both considered; the heat dissipation structure can simultaneously drive external air to enter and flow through the electric control structure, so that the operation of the electric control structure is stable and reliable, and the service life is long.

Description

Technical Field

[0001] The utility model relates to the technical field of cooking equipment, and more specifically, to a microwave oven. Background Art

[0002] With the continuous improvement of the performance requirements of modern families for kitchen appliances, as a commonly used kitchen heating device, the heating efficiency and heating uniformity of microwave ovens have become the focus of user attention. Traditional microwave ovens generally use a single magnetron as a microwave source, and introduce microwaves into the oven cavity through a single waveguide to heat food; however, due to the limited power and microwave radiation range of a single magnetron, the microwave distribution in the oven cavity is often uneven. Especially when heating larger or irregularly shaped foods, the heat absorption differences of different parts of the food are significant, affecting the heating effect. For this reason, dual-magnetron microwave ovens have emerged and have gradually become representatives of high-end microwave oven products.

[0003] Dual-magnetron microwave ovens generate and amplify microwave energy by two independent magnetrons working simultaneously. These microwaves are transmitted to the oven cavity through a waveguide system to heat food, resulting in a significant increase in the overall heat dissipation load. Traditional heat dissipation designs may not be able to meet the heat dissipation requirements of the dual-inverter system, thereby affecting the stable operation and lifespan of the device.

[0004] In view of this, the present utility model is specifically proposed. Summary of the Utility Model

[0005] The problem solved by the present utility model is that the structure of the existing dual-magnetron microwave oven is unreasonable, resulting in poor heat dissipation performance.

[0006] To solve the above problems, the present utility model provides a microwave oven, including a furnace cavity assembly and an air inlet structure. The air inlet structure is arranged below the front side of the furnace cavity assembly. A first magnetron, a second magnetron, and an electric control structure are arranged below the furnace cavity assembly. A first heat dissipation structure is arranged on the side of the first magnetron, and a second heat dissipation structure is arranged on the side of the second magnetron. The electric control structure is arranged between the inlet end of the first heat dissipation structure or the second heat dissipation structure and the air inlet structure.

[0007] The microwave oven of the present application can dissipate heat from two microwave generating devices by arranging the first heat dissipation structure and the second heat dissipation structure, taking into account both the heating efficiency and heat dissipation performance of the microwave oven; at the same time, the electric control structure is arranged between the second ventilation hole and the inlet end of the first heat dissipation structure or the second heat dissipation structure. While using the first heat dissipation structure or the second heat dissipation structure to dissipate heat from the microwave generating device, it drives the outside air to enter and first flow through the electric control structure, so that the operation of the electric control structure is stable and reliable, and the service life is long.

[0008] Preferably, a first air duct is provided below the furnace chamber assembly. A first variable frequency device is provided in the first air duct. The first variable frequency device is electrically connected to the first magnetron and / or the second magnetron. A fan assembly is provided at the inlet end of the first air duct. The fan assembly is disposed adjacent to the electric control structure and is used to drive the air flow.

[0009] This setting can use the fan assembly to drive the air flow near the electric control structure into the first air duct, thereby dissipating heat from the first variable frequency device; at the same time, it can also make the outside air enter the housing assembly through the second ventilation holes, further improving the heat dissipation effect of the electric control structure.

[0010] Preferably, a second air duct is provided below the furnace chamber assembly. A second variable frequency device is provided in the second air duct. The first variable frequency device is electrically connected to the first magnetron. The second variable frequency device is electrically connected to the second magnetron. A second fan assembly is provided in the second air duct for driving the air flow.

[0011] This setting enables the first magnetron and the second magnetron to operate completely independently without interfering with each other; further improving the emission frequency and operation stability of the microwave oven. Even if one set of microwave emission components fails, food can still be heated.

[0012] Preferably, the first air duct extends along the diagonal direction of the bottom plate of the furnace chamber assembly and is located between the first magnetron and the second magnetron. The inlet end of the second air duct is disposed opposite to the electric control structure and is located on the side of the second magnetron away from the first magnetron.

[0013] This setting can use the second fan assembly to drive the air flow around the electric control structure, ensuring good heat dissipation performance and stable and reliable operation of the electric control structure; the structure is compact and the space utilization rate is high.

[0014] Preferably, the microwave oven further includes a first waveguide box and a second waveguide box. The first waveguide box is located at the bottom of the furnace chamber assembly and is connected to the first magnetron, and is used to input the microwave generated by the first magnetron from the bottom of the furnace chamber assembly; the second waveguide box is located at the rear side of the furnace chamber assembly and is connected to the second magnetron, and is used to input the microwave generated by the second magnetron from the rear side of the furnace chamber assembly.

[0015] This setting enables the microwaves generated by the first magnetron and the second magnetron to enter the furnace chamber assembly from different directions, which is beneficial to the full coverage of the three-dimensional space inside the furnace chamber assembly, and the heating effect and the microwave distribution are uniform; the structure is compact and the space utilization rate is high.

[0016] Preferably, a first partition plate placed vertically is provided on the side of the furnace cavity assembly. A wind guide cover, a lighting assembly, and a temperature sensing assembly are provided on the first partition plate. The wind guide cover is located on the side of the first partition plate away from the furnace cavity assembly. The wind guide cover and the first partition plate cooperate to form the third heat dissipation structure. A driving device is provided at the inlet end of the wind guide cover for driving air flow to dissipate heat from the lighting assembly and the temperature sensing assembly simultaneously. This setting can utilize the driving device to dissipate heat from the lighting assembly and the temperature sensing assembly simultaneously, meet the heat dissipation requirements on the side of the microwave oven, and improve the operation stability and reliability of the device.

[0017] Preferably, there is a gap between the first partition plate and the furnace cavity assembly. The furnace cavity assembly is provided with an air inlet and an air outlet. The air inlet is close to the first partition plate and communicated with the third heat dissipation structure. The air inlet and the air outlet are respectively located on both sides of the furnace cavity assembly.

[0018] This setting can utilize the driving device to drive a part of the air flowing out through the third heat dissipation structure to enter the furnace cavity assembly from the air inlet, so as to carry out the condensed water and oil droplets generated during the process of heating food, for a better experience.

[0019] Preferably, the microwave oven includes a base. The air inlet structure is a second ventilation hole provided on the front side of the base. The first heat dissipation structure includes a first air inlet part. The first air inlet part is arranged opposite to the second ventilation hole and is located in front of the first magnetron. A driving component is provided in the first air inlet part for driving air flow.

[0020] Preferably, the first heat dissipation structure further includes a first air outlet part. The first air outlet part is located behind the first magnetron. The first air inlet part and the first air outlet part are communicated through the heat dissipation structure of the first magnetron.

[0021] Preferably, a bottom mounting plate is provided below the bottom plate of the furnace cavity assembly. The first air duct is fixedly provided below the bottom mounting plate. The outlet end of the first air duct extends to the corner position of the bottom mounting plate. Air outlets or air outlet grilles are provided on two side surfaces of the first air duct close to the corners.

[0022] This setting enables the heat-dissipated air to flow outwards in two directions, realizing a more optimized distribution of the air flow in the first air duct. The vertical air outlet design of the two air outlet directions, under their combined action, not only enhances the uniformity of air flow but also effectively avoids air flow dead angles, improving the overall ventilation and air exchange effect. In addition, by providing one or two air outlet structures on the second accommodating part close to the bottom mounting plate, the air outlet area of the first air duct can be further increased, helping to discharge heat faster, thereby improving the heat dissipation efficiency.

[0023] Compared with the prior art, the microwave oven of the present utility model has the following beneficial effects: 1) It can dissipate heat from the first magnetron and the second magnetron simultaneously, taking into account both the heating efficiency and the heat dissipation performance of the microwave oven; 2) The heat dissipation structure can drive external air to enter and flow through the electronic control structure first, so that the operation of the electronic control structure is stable and reliable, and the service life is long; 3) The air outlet at the corner position of the first air duct realizes rapid heat discharge, avoids local overheating, significantly improves the heat dissipation efficiency of the first frequency conversion device, reduces the temperature rise during operation, and extends the service life of the equipment; 4) By optimizing the air duct layout and the assembly position, the problem that the frequency conversion device of the microwave oven is prone to overheating during operation is effectively solved, the temperature of the frequency conversion device during operation is reduced, its service life is extended, and the working stability and reliability of the microwave oven are improved. Description of the Drawings

[0024] Figure 1 It is an overall schematic diagram of the microwave oven according to the embodiment of the present utility model;

[0025] Figure 2 It is an exploded schematic diagram of the microwave oven according to the embodiment of the present utility model;

[0026] Figure 3 It is a partial structure schematic diagram of the microwave oven according to the embodiment of the present utility model;

[0027] Figure 4 is Figure 3 the exploded schematic diagram of the partial structure in

[0028] Figure 5 It is a side assembly schematic diagram of the oven cavity assembly according to the present utility model;

[0029] Figure 6 It is an exploded schematic diagram of the first air duct according to the present utility model.

[0030] Description of the Reference Numerals:

[0031] 100 - Furnace cavity assembly; 200 - Door assembly; 300 - Housing assembly; 301 - U-shaped housing; 3011 - First ventilation hole; 302 - Base; 3021 - Second ventilation hole; 1 - Bottom mounting plate; 2 - First magnetron; 3 - First heat dissipation structure; 31 - First air inlet part; 32 - First air outlet part; 4 - First frequency conversion device; 5 - First air duct; 51 - First upper housing; 511 - First circulation part; 512 - First accommodation part; 5121 - First boss; 5122 - First air outlet grille; 52 - First lower housing; 521 - Second circulation part; 522 - Second accommodation part; 5221 - First buckle; 5222 - Second air outlet; 5223 - Second air outlet grille; 5224 - Limit groove; 53 - Fan assembly; 6 - Second magnetron; 7 - Second heat dissipation structure; 71 - Second air inlet part; 72 - Second air outlet part; 8 - Second frequency conversion device; 9 - Second air duct; 91 - Second upper housing; 92 - Second lower housing; 10 - First waveguide box; 11 - Second waveguide box; 12 - First partition; 13 - Air guide cover; 14 - Lighting assembly; 15 - Temperature sensing assembly; 16 - Driving device; 17 - Electric control structure. Detailed implementation manners

[0032] To make the above objects, features, and advantages of the present utility model more obvious and understandable, the following will make a detailed description of the specific embodiments of the present utility model with reference to the accompanying drawings. On the premise of no conflict, the technical features of the embodiments of the present utility model can be combined with each other.

[0033] It should be noted that all the terms for indicating directions and positions in the present utility model, such as: "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "inner", "outer", "top", "bottom", "lateral", "longitudinal", "center", etc., are only used to explain the relative position relationship and connection situation between components in a certain specific state (as shown in the accompanying drawings), and are only for the convenience of describing the present utility model, rather than requiring the present utility model to be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. In addition, the descriptions involving "first", "second", etc. in the present utility model are only for descriptive purposes, and should not be construed as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features.

[0034] In the description of the present utility model, unless otherwise clearly specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0035] In the description of this specification, the descriptions with reference to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples" mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0036] As Figures 1-6 As shown, a microwave oven includes a base 302, a cavity assembly 100 is disposed above the base 302, a second ventilation hole 3021 is disposed on the front side of the base 302, a first magnetron 2, a second magnetron 6, and an electric control structure 17 are disposed below the cavity assembly 100. The first magnetron 2 conveys microwaves into the cavity assembly 100 through a first waveguide box 10, and the second magnetron 6 conveys microwaves into the cavity assembly 100 through a second waveguide box 11. A first heat dissipation structure 3 is disposed on the side of the first magnetron 2, a second heat dissipation structure 7 is disposed on the side of the second magnetron 6, and the electric control structure 17 is disposed between the inlet end of the first heat dissipation structure 3 or the second heat dissipation structure 7 and the second ventilation hole 3021.

[0037] The microwave oven of the present application can dissipate heat from the two microwave generating devices by providing the first heat dissipation structure 3 and the second heat dissipation structure 7, and can take into account both the heating efficiency and the heat dissipation performance of the microwave oven. At the same time, the electric control structure 17 is disposed between the second ventilation hole 3021 and the inlet end of the first heat dissipation structure 3 or the second heat dissipation structure 7. While the first heat dissipation structure 3 or the second heat dissipation structure 7 dissipates heat from the microwave generating device, it drives the external air to enter and flow through the electric control structure 17 first, so that the operation of the electric control structure 17 is stable and reliable, and the service life is long.

[0038] As an example of the present utility model, the first heat dissipation structure 3 includes a first air inlet portion 31 and a first air outlet portion 32. The first air inlet portion 31 is disposed opposite to the second ventilation hole 3021. The first air inlet portion 31 and the first air outlet portion 32 are located on the front and rear sides of the first magnetron 2. The first air inlet portion 31 and the first air outlet portion 32 are connected through the heat dissipation structure of the first magnetron 2. A driving component is disposed in the first air inlet portion 31 or the first air outlet portion 32 for driving the air flow. It should be noted that the heat dissipation structure of the first magnetron 2 refers to heat dissipation fins. This setting can directly convey the external air into the first heat dissipation structure 3, and has a good heat dissipation effect on the first magnetron 2.

[0039] As an example of the present utility model, a deflector is provided at the outlet of the first air outlet part 32 for guiding the outgoing air flow to flow away from one side of the first air duct 5. This setting is conducive to the outgoing air flow being discharged from the corresponding air outlet of the U-shaped housing 301 as soon as possible, effectively preventing the outgoing air flow from interfering with the air outlet of the first air duct 5.

[0040] As an example of the present utility model, the second heat dissipation structure 7 includes a second air inlet part 71 and a second air outlet part 72. The second air inlet part 71 and the second air outlet part 72 are located on the left and right sides of the second magnetron 6. The second air inlet part 71 and the second air outlet part 72 are communicated through the heat dissipation structure of the second magnetron 6. The inlet end of the first air inlet part 31 is arranged towards the electric control structure 17, and the outlet end of the second air outlet part 72 is arranged towards the rear side of the furnace cavity assembly 100. A driving component is arranged in the second air inlet part 71 for driving the air flow to flow.

[0041] Preferably, the second air inlet part 71 is located between the second magnetron 6 and the second air duct 9, and the second air outlet part 72 is located between the second magnetron 6 and the first air duct 5. This setting can ensure good heat dissipation of the second magnetron 6 and stable and reliable operation; at the same time, the structure is compact, occupies a small space, and can meet the use requirements of modern household scenarios.

[0042] As an example of the present utility model, a bottom mounting plate 1 is provided below the bottom plate of the furnace cavity assembly 100, and the first magnetron 2 and the first heat dissipation structure 3 are fixedly assembled on the bottom mounting plate 1. This setting can avoid direct contact between the first magnetron 2 and the furnace cavity assembly 100, prevent unnecessary heat conduction; at the same time, it can reduce the number of holes opened on the furnace cavity assembly 100, effectively prevent microwave leakage; the use of the bottom mounting plate 1 can improve the overall strength of the microwave oven and the assembly is stable and reliable.

[0043] Preferably, a first air duct 5 is provided below the furnace cavity assembly 100, a first frequency conversion device 4 is arranged in the first air duct 5, the first frequency conversion device 4 is electrically connected to the first magnetron 2 and / or the second magnetron 6, a fan assembly 53 is arranged at the inlet end of the first air duct 5, and the fan assembly 53 is arranged close to the electric control structure 17 for driving the air flow to flow.

[0044] This setting can use the fan assembly 53 to drive the air flow near the electric control structure 17 into the first air duct 5, thereby dissipating heat from the first frequency conversion device 4; at the same time, it can also make the outside air enter the housing assembly 300 through the second ventilation hole 3021, further improving the heat dissipation effect on the electric control structure 17.

[0045] As an example of the present utility model, the first air duct 5 includes a first upper housing 51 and a first lower housing 52. The first upper housing 51 and the first lower housing 52 are detachably fixed. The first upper housing 51 includes a first flow-through portion 511 and a first accommodating portion 512. The first lower housing 52 includes a second flow-through portion 521 and a second accommodating portion 522. The first flow-through portion 511 and the second flow-through portion 521 cooperate to form a cavity communicating with the air outlet of the fan assembly 53 for forming an air flow. The first accommodating portion 512 and the second accommodating portion 522 cooperate to form an installation space for accommodating the first frequency conversion device 4.

[0046] Preferably, the first lower housing 52 and the first upper housing 51 are snap-connected by a plurality of mutually cooperating first bosses 5121 and first snap-fasteners 5221. The first bosses 5121 are provided on one of the first lower housing 52 and the first upper housing 51, and the corresponding first snap-fasteners 5221 are provided on the other component. As a specific example of the present application, the first bosses 5121 are provided on the first accommodating portion 512 of the first upper housing 51, and the first snap-fasteners 5221 are provided on the second accommodating portion 522 of the first lower housing 52.

[0047] This setting further optimizes the structure of the first air duct 5, ensures the smooth flow of air, improves the heat dissipation efficiency, and through the detachable design, makes the maintenance and replacement of the first frequency conversion device 4 easier, with stable connection, convenient assembly, and realizes the efficient heat dissipation and convenient maintenance of the first air duct 5.

[0048] As a preferred example of the present application, second air outlet grilles 5223 and / or second air outlets 5222 are respectively provided on two side edges near the corners of the second accommodating portion 522. Correspondingly, first air outlet grilles 5122 and / or air outlet holes are provided on two side edges near the corners of the first accommodating portion 512. As a specific example of the present application, the first lower housing 52 is provided on the bottom mounting plate 1, and the first upper housing 51 is provided on the side of the first lower housing 52 away from the bottom mounting plate 1. Second air outlet grilles 5223 and second air outlets 5222 are respectively provided on two side edges of the second accommodating portion 522 at the corners of the first lower housing 52. The air outlet directions of the second air outlet grilles 5223 are perpendicular to the air outlet directions of the second air outlets 5222. Correspondingly, one first air outlet grille 5122 is provided on each of the two side edges at the corners of the first accommodating portion 512 of the first upper housing 51, and the air outlet directions of the two first air outlet grilles 5122 are perpendicular to each other.

[0049] This setting discloses the specific air outlet structure of the first air duct 5, enabling the air after heat dissipation to flow outwards in two directions, achieving a more optimized distribution of the air flow in the first air duct 5. The vertical air outlet design in the two air outlet directions, under their combined action, not only enhances the uniformity of air circulation but also effectively avoids air flow dead ends, improving the overall ventilation effect. In addition, by providing one or two air outlet structures on the second accommodating part 522 near the bottom mounting plate 1, the air outlet area of the first air duct 5 can be further increased, helping to discharge heat more quickly, thereby improving the heat dissipation efficiency.

[0050] As a preferred example of this application, a limiting groove 5224 is provided at the connection between the first lower housing 52 and the first upper housing 51 for plug-in sealing and limiting. As a specific example of this application, the limiting groove 5224 is provided on the first lower housing 52 and extends from the end of the second flow-through part 521 to the circumferential position of the opening of the second accommodating part 522. After the open end edge of the first upper housing 51 extends into the second accommodating part 522 of the first lower housing 52, it is snap-connected through a plurality of first snap fasteners 5221 and first bosses 5121.

[0051] This setting, through the optimized design of the limiting groove 5224 at the connection between the first lower housing 52 and the first upper housing 51, enables effective sealing and limiting at the connection, improves the sealing performance of the first air duct 5, reduces air leakage, and also enhances the structural strength of the air duct, making it more stable and reliable during use.

[0052] Preferably, a second air duct 9 is provided below the cavity assembly 100. A second frequency conversion device 8 is provided in the second air duct 9. The first frequency conversion device 4 is electrically connected to the first magnetron 2, and the second frequency conversion device 8 is electrically connected to the second magnetron 6. A second fan assembly is provided in the second air duct 9 for driving the air flow. This setting enables the first magnetron 2 and the second magnetron 6 to operate completely independently without interference; further improves the emission frequency and operating stability of the microwave oven. Even if one set of microwave emission components fails, food can still be heated.

[0053] Preferably, the first air duct 5 extends along the diagonal direction of the bottom plate of the cavity assembly 100 and is located between the first magnetron 2 and the second magnetron 6. The inlet end of the second air duct 9 faces the electric control structure 17 and is located on the side of the second magnetron 6 away from the first magnetron 2. This setting can utilize the second fan assembly to drive the air flow around the electric control structure 17, ensuring good heat dissipation performance and stable and reliable operation of the electric control structure 17; the structure is compact and the space utilization rate is high.

[0054] As an example of the present utility model, the second air duct 9 includes a detachably connected second upper housing 91 and a second lower housing 92 to form a receiving space groove for installing and accommodating the second frequency conversion device 8. The second lower housing 92 is fixedly assembled on the bottom mounting plate 1 and cooperates with other components to form a part of the second air inlet portion 71. This setting enables the second air duct 9 to be connected to the second heat dissipation structure 7, improving the fastening and reliability of the assembly.

[0055] Preferably, the receiving space of the first frequency conversion device 4 and the second air duct 9 are respectively arranged at two corner positions at the rear end of the bottom mounting plate 1. A third air outlet grille is arranged at the rear end of the second upper housing 91, a third air outlet is arranged at the rear end of the second lower housing 92, and a second limiting groove for plugging and limiting is arranged at the connection between the second upper housing 91 and the second lower housing 92.

[0056] This setting further optimizes the installation position and structure of the second air duct 9. By arranging the second air duct 9 at another corner position of the bottom mounting plate 1, independent and efficient heat dissipation of the second frequency conversion device 8 is achieved. The structural design concept of the second air duct 9 is the same as that of the first air duct 5, which is convenient for installation and maintenance, and enhances the stability and reliability of the structure.

[0057] Preferably, the microwave oven further includes a first waveguide box 10 and a second waveguide box 11. The first waveguide box 10 is located at the bottom of the cavity assembly 100 and is connected to the first magnetron 2 for inputting the microwave generated by the first magnetron 2 from the bottom of the cavity assembly 100. The second waveguide box 11 is located at the rear side of the cavity assembly 100 and is connected to the second magnetron 6 for inputting the microwave generated by the second magnetron 6 from the rear side of the cavity assembly 100. This setting enables the microwaves generated by the first magnetron 2 and the second magnetron 6 to enter the cavity assembly 100 from different directions, which is beneficial to the full coverage of the three-dimensional space inside the cavity assembly 100, and the heating effect and microwave distribution are uniform.

[0058] Preferably, a first partition plate 12 placed vertically is arranged on the side of the cavity assembly 100. A wind guide cover 13, a lighting component 14, and a temperature sensing component 15 are arranged on the first partition plate 12. The wind guide cover 13 is located on the side of the first partition plate 12 away from the cavity assembly 100. The wind guide cover 13 and the first partition plate 12 cooperate to form the third heat dissipation structure. A driving device 16 is arranged at the inlet end of the wind guide cover 13 for driving air flow to dissipate heat from the lighting component 14 and the temperature sensing component 15 at the same time. This setting can use the driving device 16 to dissipate heat from the lighting component 14 and the temperature sensing component 15 at the same time, meet the heat dissipation requirements on the side of the microwave oven, and improve the operation stability and reliability of the device.

[0059] Preferably, there is a gap between the first partition 12 and the furnace cavity assembly 100. The furnace cavity assembly 100 is provided with an air inlet and an air outlet. The air inlet is arranged close to the first partition 12 and communicated with the third heat dissipation structure. The air inlet and the air outlet are respectively located on both sides of the furnace cavity assembly 100. This setting can utilize the driving device 16 to drive a part of the air flowing out of the third heat dissipation structure to enter the furnace cavity assembly 100 from the air inlet, so as to carry out the condensed water and oil droplets generated during the heating of food, for better experience.

[0060] The microwave oven further includes a door assembly 200 and a housing assembly 300. The door assembly 200 is arranged at the front end of the furnace cavity assembly 100 and can open or cover its opening. The specific structures and assembly relationships of the door assembly 200 and the housing assembly 300 are prior arts and will not be elaborated here.

[0061] As a preferred example of the present application, the housing assembly 300 includes a U-shaped outer shell 301 and a base 302. The U-shaped outer shell 301 and the base 302 cover the outside of the furnace cavity assembly 100. The base 302 is located below the first magnetron 2 and the second magnetron 6. A first ventilation hole 3011 is arranged at a position corresponding to the driving device 16 for delivering air into the third heat dissipation structure.

[0062] Although the present invention is disclosed as above, the present invention is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention should be subject to the scope defined by the claims.

Claims

1. A microwave oven, comprising a cavity assembly (100) and an air inlet structure, the air inlet structure being arranged below the front side of the cavity assembly (100), characterized in that, A first magnetron (2), a second magnetron (6), and an electric control structure (17) are arranged below the furnace cavity assembly (100). A first heat dissipation structure (3) is arranged on the side of the first magnetron (2), and a second heat dissipation structure (7) is arranged on the side of the second magnetron (6). The electric control structure (17) is arranged between the inlet end of the first heat dissipation structure (3) or the second heat dissipation structure (7) and the air inlet structure.

2. The microwave oven according to claim 1, characterized in that, A first air duct (5) is arranged below the furnace cavity assembly (100). A first frequency conversion device (4) is arranged in the first air duct (5). The first frequency conversion device (4) is electrically connected to the first magnetron (2) and / or the second magnetron (6). A fan assembly (53) is arranged at the inlet end of the first air duct (5). The fan assembly (53) is arranged adjacent to the electric control structure (17) and is used for driving the air flow.

3. The microwave oven according to claim 2, characterized in that, A bottom mounting plate (1) is arranged below the bottom plate of the furnace cavity assembly (100). The first air duct (5) is fixedly arranged below the bottom mounting plate (1). The outlet end of the first air duct (5) extends to the corner position of the bottom mounting plate (1). Air outlets or air outlet grilles are arranged on two side surfaces of the first air duct (5) close to the corners.

4. The microwave oven according to claim 2, wherein, A second air duct (9) is arranged below the furnace cavity assembly (100). A second frequency conversion device (8) is arranged in the second air duct (9). The first frequency conversion device (4) is electrically connected to the first magnetron (2). The second frequency conversion device (8) is electrically connected to the second magnetron (6). A second fan assembly is arranged in the second air duct (9) and is used for driving the air flow.

5. The microwave oven according to claim 4, wherein, The first air duct (5) extends along the diagonal direction of the bottom plate of the furnace cavity assembly (100) and is located between the first magnetron (2) and the second magnetron (6). The inlet end of the second air duct (9) is arranged facing the electric control structure (17) and is located on the side of the second magnetron (6) away from the first magnetron (2).

6. The microwave oven according to claim 1, characterized in that The microwave oven further includes a first waveguide box (10) and a second waveguide box (11). The first waveguide box (10) is located at the bottom of the furnace cavity assembly (100) and is connected to the first magnetron (2) for inputting the microwave generated by the first magnetron (2) from the bottom of the furnace cavity assembly (100). The second waveguide box (11) is located at the rear side of the furnace cavity assembly (100) and is connected to the second magnetron (6) for inputting the microwave generated by the second magnetron (6) from the rear side of the furnace cavity assembly (100).

7. The microwave oven according to claim 1, characterized in that, A first partition plate (12) placed vertically is provided on the side of the furnace cavity assembly (100). A wind guide cover (13), a lighting assembly (14), and a temperature sensing assembly (15) are provided on the first partition plate (12). The wind guide cover (13) is located on the side of the first partition plate (12) away from the furnace cavity assembly (100). The wind guide cover (13) and the first partition plate (12) cooperate to form a third heat dissipation structure. A driving device (16) is provided at the inlet end of the wind guide cover (13) for driving air flow to dissipate heat from the lighting assembly (14) and the temperature sensing assembly (15) simultaneously.

8. The microwave oven according to claim 7, wherein There is a gap between the first partition plate (12) and the furnace cavity assembly (100). The furnace cavity assembly (100) is provided with an air inlet and an air outlet. The air inlet is arranged close to the first partition plate (12) and communicated with the third heat dissipation structure. The air inlet and the air outlet are respectively located on both sides of the furnace cavity assembly (100).

9. The microwave oven according to claim 1, characterized in that, The microwave oven includes a base (302). The air inlet structure is a second ventilation hole (3021) provided on the front side of the base (302). The first heat dissipation structure (3) includes a first air inlet part (31). The first air inlet part (31) is arranged opposite to the second ventilation hole (3021) and located in front of the first magnetron (2). A driving component is provided in the first air inlet part (31) for driving air flow.

10. The microwave oven according to claim 9, characterized in that, The first heat dissipation structure (3) further includes a first air outlet part (32). The first air outlet part (32) is located behind the first magnetron (2). The first air inlet part (31) and the first air outlet part (32) are communicated through the heat dissipation structure of the first magnetron (2).

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