Multifunctional cooking equipment with air duct structure

Abstract

The invention discloses multifunctional cooking equipment with an air duct structure, which comprises an oven body, an air frying assembly and a microwave generating assembly, and is characterized in that a cooking cavity for placing food is formed in the oven body; the air frying assembly is arranged on the oven body and conveys hot air into the cooking cavity so as to conduct air frying cooking on food. The microwave generating assembly is located outside the oven body and used for generating microwaves to heat and cook food in the cooking cavity. The air frying device further comprises an air pipe extending from the air frying assembly to the microwave generating assembly, and an air channel is formed in the air pipe. The air frying assembly comprises a first cooling fan blade and a first driving motor for driving the first cooling fan blade to rotate, and the first cooling fan blade is communicated with the air inlet of the air pipe; and an air outlet of the air pipe faces the microwave generation assembly. Therefore, the first cooling fan blades are arranged in the air frying assembly, the first driving motor originally arranged in the air frying assembly drives the first cooling fan blades to rotate so that cold air can be generated, and then the cold air enters the air pipe and is blown to the microwave generation assembly under the guiding effect of the air duct so as to cool the microwave generation assembly; therefore, a cooling fan does not need to be additionally arranged in the microwave module for cooling the microwave module, the production and manufacturing cost is reduced, the size of the microwave module is not increased, and the compact and miniaturized design of a product is facilitated.

Description

Technical Field

[0001] The present invention relates to the technical field of cooking appliances, and particularly to a multifunctional cooking appliance provided with an air duct structure. Background Art

[0002] The information provided in this part is only background information related to the present application to facilitate those skilled in the art to understand the present application more thoroughly and accurately, and it is not necessarily prior art.

[0003] Currently, both microwave ovens and air fryers are commonly used household cooking appliances. A microwave oven has a microwave heating function and mainly heats food from the inside out. For ingredients with a tight texture or large volume, it requires an overly long heating time. An air fryer, on the other hand, uses high-speed hot air circulation technology to cook food, relying on external hot air to penetrate and heat the surface of the food. Since some ingredients have a tight texture and it is difficult for internal heat to penetrate, it often results in the defect that the food is cooked on the outside but raw on the inside.

[0004] Based on the disadvantages of the above two cooking appliances, some manufacturers have started to seek a combination of the two, and thus a multifunctional cooking appliance with a microwave-air fry combination has emerged. Among them, the microwave generating component for generating microwaves generates a large amount of heat during operation. The high-temperature environment it creates not only easily causes problems such as component aging and deformation, but also easily leads to fluctuations in the performance of components or even malfunctions. To solve the above problems, some manufacturers have additionally installed a cooling fan in the microwave module for heat dissipation. Although it can achieve the effect of heat dissipation and temperature reduction, due to the additional installation of a cooling motor, it increases the manufacturing cost and also increases the volume of the microwave module, which is not conducive to the compact and miniaturized design requirements of the product. Summary of the Invention

[0005] In order to overcome the above-mentioned defects of the prior art, the present invention provides a multifunctional cooking appliance provided with an air duct structure. By arranging an air duct between the air fry component and the microwave generating component, the cold air generated in the air fry component can be blown towards the microwave generating component under the guiding action of the air duct to cool and dissipate heat for it, so that there is no need to additionally install a cooling fan, reducing the manufacturing cost, and at the same time not increasing the volume of the microwave module, which is conducive to the compact and miniaturized design of the product.

[0006] The technical solution adopted by the present invention to solve its problems is:

[0007] A multifunctional cooking appliance provided with an air duct structure, comprising:

[0008] A furnace body, inside which a cooking cavity for placing food is formed;

[0009] An air fry component, which is arranged on the furnace body and is used to convey hot air into the cooking cavity to perform air fry cooking on food;

[0010] A microwave generating assembly, which is located outside the furnace body and is used to generate microwaves for heating and cooking food in the cooking cavity;

[0011] Wherein, it further includes an air duct extending from the air fryer assembly to the microwave generating assembly, and an air duct is formed inside the air duct; the air fryer assembly includes a first cooling fan blade and a first driving motor for driving the first cooling fan blade to rotate, and the first cooling fan blade is communicated with the air inlet of the air duct; the air outlet of the air duct faces the microwave generating assembly.

[0012] Further, it further includes a housing, and the housing surrounds the furnace body, the air fryer assembly and the microwave generating assembly, wherein:

[0013] The air duct is provided separately or integrally formed with the housing.

[0014] Further, the air fryer assembly is arranged on the top of the furnace body, and the microwave generating assembly is arranged below the furnace body.

[0015] Further, the air fryer assembly includes a protective cover arranged on the top of the furnace body, wherein:

[0016] An installation cavity is formed inside the protective cover, the first driving motor is installed on the protective cover and at least part of the motor body of the first driving motor is located in the installation cavity;

[0017] A boss is provided on the top of the protective cover, a wind guiding cavity communicated with the air inlet of the air duct is formed inside the boss, and the first cooling fan blade is arranged in the wind guiding cavity; a first output shaft extending into the wind guiding cavity and connected to the first cooling fan blade is provided on the top of the motor body.

[0018] Further, the air fryer assembly further includes a heating fan blade and a heating tube arranged in the protective cover, wherein:

[0019] A groove is formed by concave inward at the top of the furnace body, a plurality of air inlet holes communicating with the cooking cavity are opened on the bottom wall of the groove, the heating fan blade and the heating tube are both arranged in the groove, and the heating tube is wound around the outer periphery or below the heating fan blade;

[0020] A second output shaft is provided at the bottom of the first driving motor, and the second output shaft extends into the groove and is connected to the heating fan blade.

[0021] Further, the air fryer assembly further includes a heat insulation board arranged in the protective cover, wherein:

[0022] The heat insulation plate divides the installation cavity into a first cavity and a second cavity arranged up and down. The motor body of the first driving motor is located in the first cavity, and the second output shaft is arranged through the heat insulation plate; the second cavity is communicated with the groove;

[0023] It further includes a second cooling fan blade arranged in the first cavity, and the second cooling fan blade is connected to the second output shaft;

[0024] A through hole is formed at the top of the protective cover to communicate the first cavity with the air guide cavity.

[0025] Further, the second cooling fan blade is a cross-flow fan blade and is provided with a receiving cavity with an opening at the top, and at least part of the motor body of the first driving motor is received in the receiving cavity.

[0026] Further, it further includes a microwave stirring component arranged between the bottom of the furnace body and the microwave generating component, and the microwave stirring component is used for stirring and dispersing the microwave generated by the microwave generating component;

[0027] Wherein, an opening is further provided at the bottom of the furnace body opposite to the microwave stirring component, and a partition plate is arranged at the opening, and the partition plate is made of a material that can penetrate microwaves.

[0028] Further, the microwave generating component includes a magnetron, a waveguide box and a power supply module for supplying power to the magnetron, wherein:

[0029] A first waveguide cavity is formed inside the waveguide box, and the magnetron is communicated with the first waveguide cavity to input microwaves; the air outlet of the air duct faces the magnetron;

[0030] The power supply module is a high-voltage transformer and a high-voltage capacitor, and the high-voltage capacitor, the high-voltage transformer and the magnetron are respectively electrically connected; or, the power supply module is a variable-frequency power supply board, and the variable-frequency power supply board is electrically connected to the magnetron.

[0031] Further, the microwave stirring component includes a second driving motor and stirring blades, wherein:

[0032] A step is further protruded downward at the bottom of the furnace body at the opening, and a second waveguide cavity is formed inside the step; the waveguide box is arranged at the bottom of the step and the first waveguide cavity is communicated with the second waveguide cavity;

[0033] The stirring blades are arranged in the second waveguide cavity, the second driving motor is installed on the waveguide box, and the output shaft of the second driving motor passes through the first waveguide cavity and extends into the second waveguide cavity to be connected with the stirring blades.

[0034] In summary, the multifunctional cooking device with an air duct structure provided by the present invention has the following beneficial effects:

[0035] (1) By arranging an air duct between the air fryer component and the microwave generating component, and arranging a first cooling fan blade in the air fryer component, the first driving motor originally provided in the air fryer component can be used to drive the first cooling fan blade to rotate to generate cold air. Subsequently, the cold air enters the air duct and blows towards the microwave generating component under the guiding action of the air duct to cool and dissipate heat for it. Thus, there is no need to additionally arrange a cooling fan in the microwave module for heat dissipation, which not only reduces the production and manufacturing cost, but also does not increase the volume of the microwave module, facilitating the compact and miniaturized design of the product.

[0036] (2) When the air duct is integrally formed with the outer shell, when the cold air generated by the first cooling fan blade flows into the air duct, it can synchronously cool and lower the temperature of the outer shell, effectively reducing the temperature of the outer shell and preventing users from being scalded due to excessive temperature.

[0037] (3) By arranging the air fryer component at the top of the furnace body and the microwave generating component at the bottom of the furnace body, the overall structure of the cooking device is more compact, with a smaller volume and a more suitable shape for the miniaturized household use. At the same time, since the air duct extends from the air fryer component to the microwave generating component, when the cold air flows in the air duct, it can cool and lower the temperature of the outer shell from top to bottom along the height direction, with more uniform cooling and better effect.

[0038] (4) By arranging a second cooling fan blade in the first cavity and the first cavity being communicated with the air guiding cavity, when the first driving motor drives the second cooling fan blade to rotate, the cold air generated not only can cool and lower the temperature of the first driving motor, but also the cold air can enter the air guiding cavity to further increase the air volume, thereby further improving the cooling and heat dissipation effect on the microwave generating component.

[0039] (5) When the heating tube is wound around the outer periphery of the heating fan blade, and at the same time the motor main body part or completely of the first driving motor is accommodated in the accommodating cavity of the second cooling fan blade, the overall height of the cooking device can be greatly reduced, and then the saved height space can be used to install the microwave module, making the overall structure more compact.

[0040] (6) When the power supply module for powering the magnetron in the microwave generating component is a variable frequency power supply board, compared with using a high-voltage transformer and a high-voltage capacitor for power supply, it can effectively reduce the volume and weight of the microwave generating component, making the overall structure more compact and lightweight. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 It is a schematic structural diagram of the multifunctional cooking device of the present invention;

[0042] Figure 2 for Figure 1 Structural diagram from another perspective;

[0043] Figure 3 This is a schematic diagram of the structure of the multifunctional cooking device of the present invention with the outer shell and the door hidden;

[0044] Figure 4 for Figure 3 Structural diagram from another perspective;

[0045] Figure 5 for Figure 3 Schematic diagram of the structure after the cover is hidden;

[0046] Figure 6 for Figure 5 Schematic cross-sectional view of ;

[0047] Figure 7 This is a partial structural diagram of a multifunctional cooking device according to another embodiment of the present invention.

[0048] The meanings of the reference numerals are as follows:

[0049] 1. Outer casing; 11. First air inlet; 12. Heat dissipation grille; 13. Heat dissipation hole; 2. Door; 3. Furnace body; 31. Cooking cavity; 32. Partition; 33. Groove; 331. Air inlet; 34. Step; 4. Air frying assembly; 41. Protective cover; 411. Second air inlet; 42. Boss; 421. Cover plate; 4211. Third air inlet; 43. First cooling fan blade; 44. First drive motor; 441. First output shaft; 442. Second output shaft; 45. Heating fan blade; 46. Heating tube; 47. Second cooling fan blade; 48. Heat insulation board; 5. Microwave module; 51. High-voltage capacitor; 52. High-voltage transformer; 53. Magnetron; 54. Waveguide box; 55. Second drive motor; 56. Stirring blade; 57. Frequency conversion power board; 6. Air duct. DETAILED DESCRIPTION

[0050] For better understanding and implementation, 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.

[0051] In the description of the present invention, it should be noted that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the modules or components referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limiting the present invention.

[0052] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this invention belongs. The terms used in the description of this invention herein are for the purpose of describing specific embodiments only and are not intended to limit the invention.

[0053] Embodiment 1

[0054] Referring to Figures 1-6 , the present invention provides a multifunctional cooking device provided with an air duct structure, including a housing 1, a furnace body 3 disposed inside the housing 1, and a door body 2 rotatably disposed on the furnace body 3. A cooking cavity 31 for placing food is formed inside the furnace body 3, and the door body 2 is rotatably disposed on the front side of the cooking cavity 31 to open or close the cooking cavity. In addition, an air fryer assembly 4 and a microwave module 5 are disposed inside the housing 1. The air fryer assembly 4 is disposed on the furnace body 3 and is used to convey hot air into the cooking cavity 31 to perform air frying cooking on the food; the microwave module 5 includes a microwave generating assembly, and the microwave generating assembly is located outside the furnace body 3 and is used to generate microwaves to heat and cook the food in the cooking cavity 31.

[0055] Based on the above structure, when the air fryer function is started, the air fryer assembly 4 generates hot air and blows it into the cooking cavity 31. Since the hot air can directly act on the surface of the food and penetrate into the food interior through high-speed circulation, a cooking effect of crispy outside and tender inside is achieved; when the microwave heating function is started, the microwave generating assembly generates microwaves and performs in-out heating cooking on the food in the cooking cavity 31, thereby ensuring uniform heating of the food.

[0056] Among them, since the microwave generating assembly generates a large amount of heat during operation, in order to avoid the high-temperature environment generated by it from affecting itself and other components, the present application also provides an air duct structure to cool and dissipate heat for it. Specifically, the air duct structure includes an air duct 6 extending from the air fryer assembly 4 to the microwave generating assembly. An air duct is formed inside the air duct 6. The air fryer assembly 4 includes a first cooling fan blade 43 and a first driving motor 44 for driving the first cooling fan blade 43 to rotate. The first cooling fan blade 43 is communicated with the air inlet of the air duct 6; the air outlet of the air duct 6 faces the microwave generating assembly.

[0057] Thus, by providing the first cooling fan blade 43 inside the air fryer assembly 4, the first driving motor 44 originally provided inside the air fryer assembly 4 can be used to drive the first cooling fan blade 43 to rotate to generate cold air. Subsequently, the cold air can enter the air duct 6 and be blown towards the microwave generating assembly under the guiding action of the air duct to cool and dissipate heat for it. Therefore, there is no need to additionally provide a cooling fan inside the microwave module 5 to dissipate heat for it, which not only reduces the production and manufacturing cost, but also does not increase the volume of the microwave module 5, which is beneficial to the compact and miniaturized design of the product.

[0058] In this embodiment, the air duct 6 is separately provided and located between the furnace body 3 and the outer shell 1. Of course, in other embodiments, the air duct 6 and the outer shell 1 can also be integrally formed. In this way, when the cold air generated by the first cooling fan blade 43 enters the air duct 6 and flows, it can synchronously cool the outer shell 1, thereby effectively reducing the temperature of the outer shell 1 and preventing it from scalding users due to excessive temperature.

[0059] Among them, the air fryer assembly 4 is arranged on the top of the furnace body 3, the microwave module 5 is arranged at the bottom of the furnace body 3 and the microwave generating assembly is located below the furnace body 3. The air duct 6 is of an approximately U-shaped structure, and one end of it is bent so that the air inlet faces the air fryer assembly 4, and the other end is bent so that the air outlet faces the microwave generating assembly.

[0060] Thus, by arranging the air fryer assembly 4 on the top of the furnace body 3 and the microwave generating assembly below the furnace body 3, the overall structure of the cooking device is more compact, the volume is smaller, and the appearance better meets the requirements of household miniaturization. At the same time, since the air duct 6 extends from the air fryer assembly 4 to the microwave generating assembly, when the cold air flows in the air duct 6, it can cool the outer shell 1 from top to bottom in the height direction, and the cooling is more uniform and the effect is better.

[0061] Refer to Figures 3-6 As shown, the air fryer assembly 4 includes a protective cover 41 arranged on the top of the furnace body 3. An installation cavity is formed inside the protective cover 41. The first driving motor 44 is installed on the protective cover 41 and at least part of the motor body of the first driving motor 44 is located in the installation cavity. Among them, a boss 42 is provided on the top of the protective cover 41. A wind guiding cavity communicating with the air inlet of the air duct 6 is formed inside the boss 42. The first cooling fan blade 43 is arranged in the wind guiding cavity. The top of the motor body of the first driving motor 44 is provided with a first output shaft 441 extending into the wind guiding cavity and connected to the first cooling fan blade 43. In addition, a cover plate 421 is further provided on the top of the boss 42 to seal the wind guiding cavity. A plurality of third air inlet holes 4211 are provided on the cover plate 421 in a ring shape, and a plurality of first air inlet holes 11 are provided on the top of the outer shell 1 in a ring shape.

[0062] Thus, when the first driving motor 44 is started, it can drive the first output shaft 441 to rotate and then drive the first cooling fan blade 43 to rotate. At this time, external air can enter the outer shell 1 through a plurality of first air inlet holes 11 and enter the wind guiding cavity through a plurality of third air inlet holes 4211. Subsequently, the cold air can enter the air duct 6 and be blown towards the microwave generating assembly under the guiding action of the air duct to cool and dissipate heat from it.

[0063] Furthermore, the air fryer assembly further includes a heating fan blade 45 and a heating tube 46 disposed within the protective cover 41. The top of the furnace body 3 is recessed to form a groove 33, and a plurality of air inlet holes 331 communicating with the cooking cavity 31 are formed in the bottom wall of the groove 33. The heating fan blade 45 and the heating tube 46 are both disposed within the groove 33, and the heating tube 46 is wound around the outer periphery of the heating fan blade 45. Among them, a second output shaft 442 is provided at the bottom of the first drive motor 44, and the second output shaft 442 extends into the groove 33 and is connected to the heating fan blade 45. In addition, a plurality of second air inlet holes 411 of the installation cavity are annularly provided on the top wall of the protective cover 41.

[0064] Thus, when the first drive motor 44 is started, it can drive the second output shaft 442 to rotate and then drive the heating fan blade 45 to rotate. At this time, external air can enter the housing 1 through a plurality of first air inlet holes 11 and enter the installation cavity through a plurality of second air inlet holes 411. Subsequently, the air is heated by the heating tube 46 and then enters the cooking cavity 31 through a plurality of air inlet holes 331 to perform air frying cooking on the food.

[0065] Among them, the air fryer assembly 4 further includes a heat insulation plate 48 disposed within the protective cover 41. The heat insulation plate 48 divides the installation cavity into a first cavity and a second cavity arranged up and down. The motor body of the first drive motor 44 is located within the first cavity, and the second output shaft 442 passes through the heat insulation plate 48. The second cavity communicates with the groove 33. Among them, a second cooling fan blade 47 is provided within the first cavity, and the second cooling fan blade 47 is connected to the second output shaft 442. A heat dissipation grille 12 is further provided on the side of the housing 1, and the heat dissipation grille 12 is connected to both the first cavity and the second cavity.

[0066] Thus, when the first drive motor 44 is started, it can drive the second output shaft 442 to rotate and then drive the second cooling fan blade 47 to rotate. At this time, external air can enter the housing 1 through a plurality of first air inlet holes 11 and enter the first cavity through a plurality of second air inlet holes 411. Subsequently, it is discharged to the outside through the heat dissipation grille 12, thereby realizing taking away the heat to prevent the motor main body of the first drive motor 44 from overheating and causing failures. In addition, by providing the heat insulation plate 48, it can block the heat generated by the heating tube 46, thereby ensuring the normal operation of the first drive motor 44.

[0067] Among them, a through hole is provided at the top of the protective cover 41 to communicate the first cavity with the air guide cavity. In this way, when the first drive motor 44 drives the second cooling fan blade 47 to rotate, the cold air generated can not only cool down the motor body of the first drive motor 44, but also enter the air guide cavity to further increase the air volume, thereby further improving the cooling effect on the microwave generating assembly.

[0068] Preferably, the second cooling fan blade 47 is a cross-flow fan blade and is provided with a receiving cavity with an opening at the top, and at least part of the motor body of the first driving motor 44 is received in the receiving cavity. Therefore, by winding the heating tube 46 around the outer periphery of the heating fan blade 45 and at the same time receiving part or all of the motor body of the first driving motor 44 in the receiving cavity of the second cooling fan blade 47, the overall height of the cooking device is greatly reduced, and the saved height space can be used to install the microwave module 5, making the overall structure more compact.

[0069] Refer to Figure 4 and Figure 6 , the microwave module 5 further includes a microwave stirring assembly disposed between the bottom of the furnace body 3 and the microwave generating assembly, and the microwave stirring assembly is used to stir and disperse the microwave generated by the microwave generating assembly; wherein, an opening is further provided at the bottom of the furnace body 3 opposite to the microwave stirring assembly, and a partition plate 32 is provided at the opening, and the partition plate 32 is made of a material that can penetrate microwaves. Thus, by providing the microwave stirring assembly, the microwave can be evenly distributed in the cooking cavity 31 to ensure that the food is evenly heated and avoid problems such as local overheating or undercooking.

[0070] Among them, the partition plate 32 can be made of glass, ceramic or high-temperature resistant composite resin material. Preferably, the partition plate 32 is made of high-temperature resistant composite resin material, which can avoid the risk of cracking of glass and ceramic compared with using glass and ceramic materials.

[0071] More specifically, the microwave generating assembly includes a magnetron 53, a waveguide box 54 and a power supply module for supplying power to the magnetron 53; wherein, the power supply module includes a high-voltage capacitor 51 and a high-voltage transformer 52, the high-voltage capacitor 51, the high-voltage transformer 52 and the magnetron 53 are electrically connected respectively, the high-voltage transformer 52 provides a high-voltage power supply, the high-voltage capacitor 51 is used to store energy, and the magnetron 53 generates microwaves according to the input power signal; a first waveguide cavity is formed in the waveguide box 54, and the magnetron 53 is communicated with the first waveguide cavity to input microwaves. In addition, the high-voltage capacitor 51, the high-voltage transformer 52 and the magnetron 53 are all located on the side of the waveguide box 54 away from the furnace body 3, thereby increasing the distance between them and the furnace body 3, reducing the potential damage caused to these components by high temperature or microwave leakage, and improving the safety of the cooking device.

[0072] Among them, the microwave stirring assembly includes a second driving motor 55 and stirring blades 56. At the opening at the bottom of the furnace body 3, a step 34 protrudes downward, and a second waveguide cavity is formed inside the step 34; the waveguide box 54 is arranged at the bottom of the step 34, and the first waveguide cavity is communicated with the second waveguide cavity. Specifically, the stirring blades 56 are arranged in the second waveguide cavity, the second driving motor 55 is installed on the waveguide box 54, and the output shaft of the second driving motor 55 passes through the first waveguide cavity and extends into the second waveguide cavity to be connected with the stirring blades 56.

[0073] Thus, the stirring blades 56 rotate in the second waveguide cavity driven by the second driving motor 55, which can effectively stir and disperse the microwave, make the microwave more evenly distributed in the cooking cavity 31, ensure that the food is evenly heated during cooking, and improve the cooking effect.

[0074] Specifically, the working principle of the microwave module 5 is as follows: after being powered on, the high-voltage transformer 52 and the high-voltage capacitor 51 work to generate high voltage to make the magnetron 53 work to generate microwaves. The microwaves are introduced into the second waveguide cavity through the waveguide box 54. At the same time, the second driving motor 55 drives the stirring blades 56 to rotate. The rotating stirring blades 56 can disperse the microwaves in the second waveguide cavity, so that the microwaves are evenly distributed in the cooking cavity 31, thereby making the food heated evenly and improving the food cooking effect.

[0075] In addition, a plurality of heat dissipation holes 13 are also annularly arranged at the bottom of the housing 1, and the air outlet of the air duct 6 is arranged opposite to the magnetron 53; thus, the cold air blown out from the air outlet of the air duct 6 can cool the magnetron 53, and the heat can be discharged to the outside through the plurality of heat dissipation holes 13, so as to avoid problems such as component aging and deformation caused by high temperature, reduce performance fluctuations or failures caused by overheating, and further improve the overall stability of the device and extend the service life of the cooking device.

[0076] Embodiment 2

[0077] Refer to Figure 7 In this embodiment, the difference between the multifunctional cooking device in this embodiment and that in Embodiment 1 is that the structure of the power supply module for supplying power to the magnetron 53 is different. In this embodiment, the power supply module is a variable-frequency power supply board 57 integrated with a variable-frequency circuit. The variable-frequency power supply board 57 is electrically connected to the magnetron 53 to supply power to the magnetron 53, so as to make the magnetron 53 generate microwaves.

[0078] Thus, in this embodiment, the variable-frequency power supply board 57 is used to supply power to the magnetron 53. Compared with using the high-voltage transformer 52 and the high-voltage capacitor 51 for power supply, it can effectively reduce the volume and weight of the microwave generating assembly, making the overall structure more compact and lightweight.

[0079] In summary, the multifunctional cooking device with an air duct structure provided by the present invention has the following beneficial effects:

[0080] (1) By arranging an air duct 6 between the air fryer component 4 and the microwave generating component, and arranging a first cooling fan blade 43 in the air fryer component 4, the first driving motor 44 originally carried in the air fryer component 4 can be used to drive the first cooling fan blade 43 to rotate to generate cold air. Subsequently, the cold air enters the air duct 6 and blows towards the microwave generating component under the guiding action of the air duct to cool and dissipate heat for it. Thus, there is no need to additionally arrange a cooling fan in the microwave module 5 to dissipate heat for it, which not only reduces the production and manufacturing cost, but also does not increase the volume of the microwave module 5, being beneficial to the compact and miniaturized design of the product.

[0081] (2) When the air duct 6 is integrally formed with the housing 1, when the cold air generated by the first cooling fan blade 43 flows into the air duct 6, it can synchronously cool and lower the temperature of the housing 1, thus effectively reducing the temperature of the housing 1 and preventing it from scalding users due to excessive temperature.

[0082] (3) By arranging the air fryer component 4 at the top of the furnace body 3 and arranging the microwave generating component below the furnace body 3, the overall structure of the cooking device is more compact, with a smaller volume and a more conforming shape to the needs of household miniaturization; at the same time, since the air duct 6 extends from the air fryer component 4 to the microwave generating component, when the cold air flows in the air duct 6, it can cool and lower the temperature of the housing 1 from top to bottom, and its cooling is more uniform and the effect is better.

[0083] (4) By arranging a second cooling fan blade 47 in the first cavity and the first cavity being communicated with the air guiding cavity, when the first driving motor 44 drives the second cooling fan blade 47 to rotate, the cold air generated by it can not only cool and lower the temperature of the first driving motor 44, but also the cold air can enter the air guiding cavity to further increase the air volume, thereby further improving the cooling and heat dissipation effect on the microwave generating component.

[0084] (5) When the heating tube 46 is wound around the outer periphery of the heating fan blade 45, and the motor main body part or completely of the first driving motor 44 is accommodated in the accommodating cavity of the second cooling fan blade 47, the overall height of the cooking device can be greatly reduced, and then the saved height space can be used to install the microwave module, making the overall structure more compact.

[0085] (6) When the power supply module for powering the magnetron 53 in the microwave generating component is a variable frequency power supply board 57, compared with using a high-voltage transformer 52 and a high-voltage capacitor 51 for power supply, it can effectively reduce the volume and weight of the microwave generating component, making the overall structure more compact and lightweight.

[0086] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0087] It should be understood that the orientation or positional relationship indicated by terms such as "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred module or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention.

[0088] In addition, in the description of the present invention, the meanings of "a plurality of" and "several" are two or more, unless otherwise specifically defined.

[0089] The technical means disclosed in the solution of the present invention are not limited to the technical means disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements are also regarded as the protection scope of the present invention.

Claims

1. A multifunctional cooking device provided with an air duct structure, characterized in that, Comprising: A furnace body, inside which a cooking cavity for placing food is formed; An air fryer assembly, which is arranged on the furnace body and used to convey hot air into the cooking cavity for air frying the food; A microwave generating assembly, which is located outside the furnace body and used to generate microwaves for heating and cooking the food in the cooking cavity; Wherein, it further includes an air duct extending from the air fryer assembly to the microwave generating assembly, and an air passage is formed inside the air duct; the air fryer assembly includes a first cooling fan blade and a first driving motor for driving the first cooling fan blade to rotate, and the first cooling fan blade is communicated with the air inlet of the air duct; the air outlet of the air duct faces the microwave generating assembly.

2. The multifunctional cooking device according to claim 1, wherein, It further includes a housing, which surrounds the furnace body, the air fryer assembly and the microwave generating assembly, wherein: The air duct is provided separately or integrally formed with the housing.

3. The multifunctional cooking device according to claim 1 or 2, characterized in that, The air fryer assembly is arranged on the top of the furnace body, and the microwave generating assembly is arranged below the furnace body.

4. The multifunctional cooking device according to claim 3, wherein The air fryer assembly includes a protective cover arranged on the top of the furnace body, wherein: An installation cavity is formed inside the protective cover, the first driving motor is installed on the protective cover and at least part of the motor body of the first driving motor is located in the installation cavity; A convex platform is provided on the top of the protective cover, and a wind guiding cavity communicated with the air inlet of the air duct is formed inside the convex platform, and the first cooling fan blade is arranged in the wind guiding cavity; a first output shaft extending into the wind guiding cavity and connected to the first cooling fan blade is provided on the top of the motor body.

5. The multifunctional cooking device according to claim 4, characterized in that, The air fryer assembly further includes a heating fan blade and a heating tube arranged in the protective cover, wherein: A groove is formed by concave inward at the top of the furnace body, and a plurality of air inlet holes communicating with the cooking cavity are opened on the bottom wall of the groove. The heating fan blade and the heating tube are both arranged in the groove, and the heating tube is wound around the outer periphery or below the heating fan blade; A second output shaft is provided at the bottom of the first driving motor, and the second output shaft extends into the groove and is connected to the heating fan blade.

6. The multifunctional cooking device according to claim 5, characterized in that, The air fryer assembly further includes a heat insulation plate arranged in the protective cover, wherein: The heat insulation plate divides the installation cavity into a first cavity and a second cavity arranged up and down. The motor body of the first driving motor is located in the first cavity, and the second output shaft passes through the heat insulation plate; the second cavity is communicated with the groove; A second cooling fan blade arranged in the first cavity is further included, and the second cooling fan blade is connected to the second output shaft; A through hole is opened on the top of the protective cover to communicate the first cavity with the wind guiding cavity.

7. The multifunctional cooking device according to claim 6, wherein, The second cooling fan blade is a cross-flow fan blade and is provided with a receiving cavity with an open top, and at least part of the motor body of the first driving motor is received in the receiving cavity.

8. The multifunctional cooking device according to claim 3, wherein A microwave stirring assembly is further included between the bottom of the furnace body and the microwave generating assembly, and the microwave stirring assembly is used to stir and disperse the microwaves generated by the microwave generating assembly; Wherein, an opening is further provided at the bottom of the furnace body opposite to the microwave stirring assembly, a partition plate is provided at the opening, and the partition plate is made of a material that can penetrate microwaves.

9. The multifunctional cooking device according to claim 8, wherein, The microwave generating assembly includes a magnetron, a waveguide box, and a power supply module for supplying power to the magnetron, wherein: A first waveguide cavity is formed inside the waveguide box, and the magnetron is communicated with the first waveguide cavity to input microwaves; the air outlet of the air duct faces the magnetron; The power supply module is a high-voltage transformer and a high-voltage capacitor, and the high-voltage capacitor, the high-voltage transformer, and the magnetron are electrically connected respectively; alternatively, the power supply module is a variable-frequency power supply board, and the variable-frequency power supply board is electrically connected to the magnetron.

10. The multifunctional cooking device according to claim 9, characterized in that, The microwave stirring assembly includes a second driving motor and stirring blades, wherein: A step is further protruded downward at the bottom of the furnace body at the opening, and a second waveguide cavity is formed inside the step; the waveguide box is arranged at the bottom of the step and the first waveguide cavity is communicated with the second waveguide cavity; The stirring blades are arranged in the second waveguide cavity, the second driving motor is installed on the waveguide box, and the output shaft of the second driving motor passes through the first waveguide cavity and extends into the second waveguide cavity to be connected with the stirring blades.

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