Shielding structure and cooking device

Abstract

The utility model discloses a shielding case structure and cooking equipment, install in the wall of the microwave heating cavity around the space on any, be used for covering the convection motor fan blade, and the body includes the cylinder part and sets up the board body department at the cylinder part bottom, and two are integrated by punching process, be equipped with a plurality of first through -hole that linear arrangement is along the height direction along the circumferential interval arrangement on the cylinder part, form the air outlet that is used for the air inlet of intercommunication microwave heating cavity, be equipped with a plurality of second through -hole that annular array is along the circumferential direction uniform arrangement with center as the center on the board body department, form the air inlet that is used for the air inlet of intercommunication microwave heating cavity. Thus, shielding case restrains the microwave along the motor main shaft direction leakage, the position and the arrangement mode of air outlet through -hole and air inlet through -hole can satisfy hot -blast convection function while, realize the physical sheltering and energy dispersion to microwave leakage path, promote the electromagnetic shielding performance of whole machine, guarantee user use safety and enhance the electromagnetic compatibility of equipment.

Description

Technical Field

[0001] This utility model relates to the technical field of household electric heating products, specifically to a shielding structure and cooking equipment. Background Technology

[0002] As users continuously improve their cooking quality and efficiency, multi-functional cooking appliances with multiple heating methods are gradually becoming an important development direction for kitchen appliances. Taking steam ovens as an example, they add a steam generation system to the traditional oven and achieve independent or combined operation of multiple heating modes such as steam, baking, and high-temperature steam through precise electronic control programs. This meets the diverse cooking needs of different ingredients and has become a new type of intelligent cooking equipment with high functional integration and strong adaptability.

[0003] Building upon this, to improve heating uniformity and accelerate heat transfer efficiency, some devices are also equipped with convection motors to drive hot air circulation, with fan blades mounted on the motor's main shaft. However, when such devices further integrate microwave heating functionality, microwave energy leaks along the motor's main shaft installation path due to the strong penetrating and reflective properties of microwaves. This not only reduces microwave heating efficiency but also poses a risk of electromagnetic leakage, affecting user safety and the equipment's electromagnetic compatibility performance.

[0004] Therefore, how to effectively suppress microwave leakage along the motor spindle channel while ensuring the normal operation of the hot air circulation function has become a key technical problem that urgently needs to be solved in the design of current microwave-steam-grill combination ovens. Utility Model Content

[0005] To overcome the defects described in the prior art, this utility model provides a shielding cover structure and a cooking device. The shielding cover covers the fan blades of the convection motor, suppressing microwave leakage along the motor's main shaft. The position and arrangement of the air outlet and air inlet can, while satisfying the hot air convection function, achieve physical shielding and energy dissipation of the microwave leakage path, improve the electromagnetic shielding performance of the whole machine, ensure user safety, and enhance the electromagnetic compatibility of the device.

[0006] The technical solution adopted by this utility model to solve its problem is: A shielding structure, installed on any wall surface of the space enclosed by a microwave heating cavity, is used to cover the fan blades of a convection motor, comprising: The body includes a cylindrical part and a plate part disposed at one end of the cylindrical part, wherein the plate part and the cylindrical part are integrally formed by stamping process; The cylindrical body has a plurality of first through holes, which are arranged at intervals along the circumference of the plate body and in a linear array along the height of the cylindrical body; the plurality of first through holes form an air outlet for connecting the microwave heating cavity and for air outlet. The plate body has a plurality of second through holes, which are evenly spaced along the circumference of the plate body and arranged in a ring array with the center of the plate body as the center; the plurality of second through holes form an air inlet for connecting the microwave heating cavity and for air intake.

[0007] Furthermore, it also includes a first mounting spacer ring disposed at the other end of the cylindrical portion, the first mounting spacer ring being integrally formed with the cylindrical portion and the plate portion by a stamping process.

[0008] Furthermore, it also includes a first fixing plate, which has a first nesting opening and a first groove disposed on the outer edge of the first nesting opening; the cylindrical part is nested in the first nesting opening, and the first mounting spacer abuts against the first groove to connect to the first fixing plate.

[0009] Furthermore, the first mounting spacer includes a first connecting plate and a first mounting plate connected to the first connecting plate, the first connecting plate being connected to the top of the cylindrical part; the first connecting plate abutting against the bottom of the first groove and being fixed together by welding.

[0010] Furthermore, the first mounting plate is provided with a plurality of third through holes arranged at intervals along the circumference, and the first mounting plate is also provided with a plurality of first mounting holes arranged at intervals along the circumference.

[0011] Furthermore, the first nesting opening is provided with a plurality of protrusions arranged at intervals along the circumference, the protrusions being used to abut against the outer wall of the cylindrical part to achieve positioning.

[0012] Furthermore, it also includes a second fixing plate, which has a second nesting opening and an outwardly folded flange. The cylindrical part is nested in the second nesting opening, and the outer wall of the cylindrical part abuts against the inner wall of the flange and is fixed together by welding.

[0013] Furthermore, it also includes a second mounting spacer, the second mounting spacer including a second connecting plate and a second mounting plate connected to the second connecting plate; The second fixing plate is also provided with a second groove surrounding the flange, and the second connecting plate abuts against the bottom of the second groove and is welded together to realize that the second mounting spacer is fixed on the second fixing plate.

[0014] Furthermore, the diameters of both the first through hole and the second through hole are less than or equal to 8 mm.

[0015] A cooking device includes the aforementioned shielding structure, the microwave heating cavity, and the convection motor, wherein the fan blades are provided on the main shaft of the convection motor; it also includes a cooking inner pot and a microwave generating device disposed on the cooking inner pot, wherein the microwave heating cavity is formed by the interior of the cooking inner pot. The microwave heating cavity is further provided with a heating element, which is sleeved around the shielding structure; the microwave heating cavity is also provided with an inner heat insulation plate, which is used to cover the heating element and the shielding structure.

[0016] In summary, this utility model has the following technical effects: 1. The shielding cover structure and cooking equipment of this utility model cover the fan blades of the convection motor to suppress microwave leakage along the main shaft of the motor. The position and arrangement of the air outlet and air inlet can achieve physical shielding and energy dissipation of microwave leakage path while satisfying the hot air convection function, thereby improving the electromagnetic shielding performance of the whole machine, ensuring user safety and enhancing the electromagnetic compatibility of the equipment.

[0017] 2. The shielding cover structure and cooking equipment of this utility model eliminate the need for welding assembly, effectively avoiding defects such as detachment, incomplete welding, yellowing of weld points, or burning caused by welding. This prevents microwave leakage risks from the source and improves the structural stability and electromagnetic shielding reliability of the shielding cover. At the same time, it saves time and manpower required for welding and grinding, improves overall manufacturing efficiency, and reduces reliance on the welding skills of workers, which helps to ensure product consistency and mass production.

[0018] 3. The shielding structure and cooking equipment of this utility model have seamless welded connections. In actual testing, it can meet the anti-corrosion performance requirements of 144 hours of salt spray test. Even when exposed to high temperature and high humidity environment for a long time (such as inside a microwave-steam-grill combo), it can still maintain good structural strength and corrosion resistance, thus extending the service life of the product. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the shielding cover structure of this utility model; Figure 2 This is a cross-sectional schematic diagram of the shielding cover structure of this utility model; Figure 3 for Figure 2 Enlarged diagram of section A in the middle; Figure 4 This is a schematic diagram of the first mounting spacer and the main body in the shielding cover structure of this utility model; Figure 5 This is a schematic diagram of the first fixing plate in the shielding cover structure of this utility model; Figure 6 This is a schematic diagram of another embodiment of the present invention; Figure 7 This is a cross-sectional schematic diagram of another embodiment of the present invention; Figure 8 for Figure 7 Enlarged diagram of section B in the middle; Figure 9 This is a schematic diagram of the structure of the main body in another embodiment of the present invention; Figure 10 This is a schematic diagram of the structure of the second mounting spacer in another embodiment of the present invention; Figure 11 This is a schematic diagram of the structure of the second fixing plate in another embodiment of the present invention; Figure 12 This is a schematic diagram of the structure of the cooking equipment of this utility model.

[0020] The meanings of the reference numerals in the attached figures are as follows: 1. Cylinder body; 11. First through hole; 2. Plate body; 21. Second through hole; 22. Third groove; 23. Fourth groove; 24. Fifth groove; 3. First mounting spacer; 31. First connecting plate; 32. First mounting plate; 321. Third through hole; 322. First mounting hole; 4. First fixing plate; 41. First nesting opening; 42. First groove; 43. Protrusion; 5. Second mounting spacer; 51. Second connecting plate; 52. Second mounting plate; 521. Fourth through hole; 522. Second mounting hole; 6. Second fixing plate; 61. Second nesting opening; 62. Flanged edge; 63. Second groove; 7. Microwave heating cavity; 71. Inner heat insulation plate; 8. Convection motor; 81. Fan blade; 9. Heating element. Detailed Implementation

[0021] To better understand and implement this invention, the technical solutions in the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings.

[0022] In the description of this utility model, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the module or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0024] Example 1 like Figure 1-5 The shielding structure shown is installed on any wall surface of the space enclosed by the microwave heating cavity 7 to cover the fan blades 81 of the convection motor 8. Its specific installation position can be flexibly determined according to the arrangement of the convection motor 8 in the cooking equipment. The shielding structure includes a main body, which includes a cylindrical part 1 and a plate part 2 disposed at one end of the cylindrical part 1. The cylindrical part 1 and the plate part 2 are integrally formed by stamping, resulting in good structural integrity, high processing efficiency, improved assembly accuracy, and compliance with mass production requirements. It also enhances product consistency while ensuring structural strength.

[0025] The cylindrical part 1 has several first through holes 11, which are spaced apart along the circumferential direction of the plate part 2 and arranged in a linear array along the height direction of the cylindrical part 1. The several first through holes 11 form an air outlet for connecting the microwave heating cavity 7 and guiding the hot air out, which is conducive to the uniform export of airflow from multiple height levels and enhances the stability and coverage of the hot air flow in the furnace cavity. The plate part 2 has several second through holes 21 for air intake, which are evenly spaced along its circumference and arranged in a ring array with the center of the plate part 2 as the center. The several second through holes 21 form an air inlet for connecting the microwave heating cavity 7 and for drawing in air, which is convenient for drawing in air evenly from multiple angles and improving the air circulation efficiency.

[0026] This utility model discloses a shielding cover structure that encloses the fan blades 81 of the convection motor 8. While ensuring the smooth flow of hot air, it addresses the potential leakage of microwaves along the motor's main axis in microwave cooking equipment. Through the spatial layout and arrangement of the air outlet and inlet vents, a multi-layered physical shielding and energy scattering structure is formed, effectively weakening or blocking microwave leakage paths along the main axis. This structure, while meeting the requirements for hot air circulation and ventilation, enhances the electromagnetic shielding capability of the entire machine, thereby strengthening the equipment's electromagnetic compatibility performance, ensuring user safety, and preventing potential impacts of microwave leakage on the human body and the electronic control system.

[0027] This structure, through its integrated molding design, eliminates traditional welding and grinding processes, saving time, reducing labor intensity, and improving production efficiency. Furthermore, it avoids defects such as incomplete welds, detachment, yellowing of weld points, and burning caused by welding, thus enhancing the overall structural stability and electromagnetic shielding reliability of the shield and effectively preventing microwave leakage risks. In addition, since there are no welded seams between the cylindrical part 1 and the plate part 2, the shield can stably pass the 144-hour corrosion resistance test requirement in salt spray testing, making it suitable for microwave-steam-grill combos that operate in high-temperature and high-humidity environments for extended periods, effectively extending product lifespan.

[0028] It should be noted that, in this embodiment, the first through hole 11 and the second through hole 21 can be formed by processing techniques such as stamping, laser, etching, and abrasive waterjet processing. Furthermore, the diameters of both the first through hole 11 and the second through hole 21 are less than or equal to 8 mm; secondly, the diameter of the first through hole 11 can be the same as the diameter of the second through hole 21, or they can be different.

[0029] Furthermore, the shielding structure also includes a first mounting spacer 3, which is integrally formed with the cylinder part 1 and the plate part 2 by a stamping process, thereby further improving the overall structure and sealing performance.

[0030] The structure also includes a first fixing plate 4, on which a first nesting opening 41 and a first groove 42 located on the outer edge of the first nesting opening 41 are provided; the cylindrical part 1 is nested in the first nesting opening 41, and the first mounting spacer 3 abuts against the first groove 42 for connection.

[0031] Specifically, the first mounting spacer 3 includes a first connecting plate 31 and a first mounting plate 32 connected to the first connecting plate 31. The first connecting plate 31 is connected to the top of the cylinder part 1. The first connecting plate 31 abuts against the bottom of the first groove 42 and is fixed together by welding, riveting, threaded connection or other means.

[0032] Furthermore, the first mounting plate 32 is provided with a plurality of third through holes 321 arranged at intervals along the circumference, and the first mounting plate 32 is also provided with a plurality of first mounting holes 322 arranged at intervals along the circumference, so as to facilitate the installation of the convection motor 8, thereby allowing the fan blades 81 of the convection motor 8 to be covered by the shield.

[0033] To achieve a more stable positioning, the first nesting opening 41 is provided with a plurality of protrusions 43 arranged circumferentially at intervals, which are used to abut against the outer wall of the cylinder part 1 to ensure precise positioning during assembly and welding.

[0034] Example 2 like Figure 6-11As shown, the main difference between this embodiment and the first embodiment above is that the mounting spacer and the main body are not an integral structure in this embodiment, and the nesting structure is provided with a flange 62.

[0035] Specifically, the structure includes a second fixing plate 6, on which a second nesting opening 61 is provided, and the edge of the second nesting opening 61 is provided with an outwardly folded flange 62. The cylindrical part 1 is nested in the second nesting opening 61, and its top is flush with the top of the flange 62. The outer side wall of the cylindrical part 1 abuts against the inner side wall of the flange 62, and is fixed together by welding, riveting, threaded connection or other means.

[0036] Furthermore, the structure also includes a second mounting spacer 5, which includes a second connecting plate 51 and a second mounting plate 52 connected to the second connecting plate 51; the second fixing plate 6 is also provided with a second groove 63 along the outer side of the flange 62, the second connecting plate 51 abuts against the bottom of the second groove 63, and the second mounting spacer 5 is reliably fixed on the second fixing plate 6 by welding, riveting, threaded connection or other means.

[0037] Similarly, the second mounting plate 52 is provided with a plurality of fourth through holes 521 arranged at intervals along the circumference, and the second mounting plate 52 is also provided with a plurality of second mounting holes 522 arranged at intervals along the circumference, so as to facilitate the installation of the convection motor, thereby allowing the fan blades 81 of the convection motor 8 to be covered by the shield.

[0038] In this embodiment, the plate body 2 is further provided with a third groove 22, a fourth groove 23 and a fifth groove 24, which constitute a reinforcing rib structure, thereby enhancing the overall rigidity of the plate body 2 and improving the shield's resistance to deformation.

[0039] It should be noted that in the above embodiments one and two, when the connection between the first mounting spacer 3 and the first fixing plate 4 is made by welding, the welding is performed around the circumference of the first nesting opening 41 to form a closed and continuous welding ring, thereby ensuring the firmness and sealing of the structural connection. Similarly, the welding of the second mounting spacer 5 and the second fixing plate 6, and the welding of the cylinder part 1 and the flange 62 are also performed around the circumference of the second nesting opening 61 to form a closed and continuous welding ring. This improves the overall connection strength and corrosion resistance of the structure, avoids the leakage risk caused by incomplete welding, effectively prevents electromagnetic wave leakage, ensures that the shielding cover has good microwave shielding capability and electromagnetic safety, and further improves the overall performance and reliability of the cooking equipment.

[0040] Example 3 In addition, this utility model also provides a cooking device, including the shielding cover structure of Embodiment 1 or Embodiment 2 described above. (See reference...) Figure 12The cooking device adopts the shielding structure of Embodiment 1. The cooking device also includes a cooking inner pot and a microwave generator set on the cooking inner pot. The interior of the cooking inner pot forms a microwave heating cavity 7. The cooking device is also equipped with a convection motor 8, and the main shaft of the convection motor 8 is equipped with fan blades 81. The convection motor 8 is installed on the first mounting ring 3, and the fan blades 81 on the main shaft of the convection motor 8 are covered by the shielding structure. The shielding structure meets the dual requirements of microwave shielding performance and ventilation and heat dissipation, and also improves the overall manufacturing quality and service life. It is particularly suitable for integrated home appliances such as microwave-steam-grill combos.

[0041] In this embodiment, the cooking device includes a cooking inner pot, on which a microwave generator is installed, forming a microwave heating cavity 7. A heating element 9 is disposed within the microwave heating cavity 7, and is fitted around the outer periphery of the shielding structure to provide radiant heating to the area within the shield. Combined with the air circulation created by the fan blades 81 driven by the convection motor 8, hot air can be efficiently distributed within the microwave heating cavity 7, thereby improving overall heating efficiency and accelerating the heating speed of the food.

[0042] The microwave heating cavity 7 is also equipped with an inner heat insulation plate 71, which covers the outside of the heating element 9 and the shielding structure. This helps to form a stable heating environment on one side of the heating element 9, thereby improving the uniformity of the heat field and the cooking quality.

[0043] It should be noted that the inner heat insulation panel 71 is provided with air vents for ventilation (not shown in the figure).

[0044] In summary, the shielding structure and cooking equipment of this utility model, with the shielding cover covering the fan blades 81 of the convection motor 8, suppress microwave leakage along the main shaft of the motor. The position and arrangement of the air outlet and air inlet can, while satisfying the function of hot air convection, achieve physical shielding and energy dissipation of the microwave leakage path, improve the electromagnetic shielding performance of the whole machine, ensure user safety and enhance the electromagnetic compatibility of the equipment.

[0045] This utility model relates to a shielding cover structure and cooking equipment. The shielding cover does not require welding assembly, effectively avoiding defects such as detachment, incomplete welding, yellowing of weld points, or burning caused by welding. It prevents microwave leakage risks from the source and improves the structural stability and electromagnetic shielding reliability of the shielding cover. At the same time, it saves time and manpower required for welding and grinding, improves overall manufacturing efficiency, and reduces reliance on the welding skills of workers, which helps to ensure product consistency and mass production.

[0046] This utility model features a shielding structure and cooking equipment with seamless connections. In actual testing, it meets the corrosion resistance requirements of a 144-hour salt spray test. Even under long-term high-temperature and high-humidity environments (such as inside a microwave-steam-grill combo), it can still maintain good structural strength and corrosion resistance, thus extending the product's service life.

[0047] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on the other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to the other component.

[0048] It should be understood that the terms "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the module or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0049] Furthermore, in the description of this utility model, "multiple" and "several" mean two or more, unless otherwise explicitly specified.

[0050] The technical means disclosed in this utility model are not limited to those disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications are also considered within the scope of protection of this utility model.

Claims

1. A shielding structure, installed on any wall surface of the space enclosed by a microwave heating cavity (7), for covering the fan blades (81) of a convection motor (8), characterized in that, include: The body includes a cylindrical part (1) and a plate part (2) disposed at one end of the cylindrical part (1), wherein the plate part (2) and the cylindrical part (1) are integrally formed by stamping process; The cylindrical part (1) is provided with a plurality of first through holes (11), which are arranged at intervals along the circumference of the plate part (2) and are arranged in a linear array along the height direction of the cylindrical part (1); the plurality of first through holes (11) form an air outlet for connecting the microwave heating cavity (7) and for air outlet. The plate part (2) has a plurality of second through holes (21), which are evenly spaced along the circumference of the plate part (2) and arranged in a ring array with the center of the plate part (2) as the center; the plurality of second through holes (21) form an air inlet for connecting the microwave heating cavity (7) and for air intake.

2. The shielding structure according to claim 1, characterized in that, It also includes a first mounting spacer (3) disposed at the other end of the cylindrical part (1), wherein the first mounting spacer (3) is integrally formed with the cylindrical part (1) and the plate part (2) by a stamping process.

3. The shielding cover structure according to claim 2, characterized in that, It also includes a first fixing plate (4), on which a first nesting opening (41) and a first groove (42) are provided on the outer edge of the first nesting opening (41); the cylindrical part (1) is nested in the first nesting opening (41), and the first mounting spacer (3) abuts against the first groove (42) to be connected to the first fixing plate (4).

4. The shielding cover structure according to claim 3, characterized in that, The first mounting spacer (3) includes a first connecting plate (31) and a first mounting plate (32) connected to the first connecting plate (31). The first connecting plate (31) is connected to the top of the cylindrical part (1). The first connecting plate (31) abuts against the bottom of the first groove (42) and is fixed together by welding.

5. The shielding cover structure according to claim 4, characterized in that, The first mounting plate (32) is provided with a plurality of third through holes (321) arranged at intervals along the circumference, and the first mounting plate (32) is also provided with a plurality of first mounting holes (322) arranged at intervals along the circumference.

6. The shielding cover structure according to claim 3, characterized in that, The first nesting opening (41) is provided with a plurality of protrusions (43) arranged at intervals along the circumference. The protrusions (43) are used to abut against the outer wall of the cylindrical part (1) to achieve positioning.

7. The shielding cover structure according to claim 1, characterized in that, It also includes a second fixing plate (6), on which a second nesting opening (61) is provided, and on which an outwardly folded flange (62) is provided; The cylindrical part (1) is nested in the second nesting opening (61), and the outer side wall of the cylindrical part (1) abuts against the inner side wall of the flange (62) and is fixed together by welding.

8. The shielding cover structure according to claim 7, characterized in that, It also includes a second mounting spacer (5), which includes a second connecting plate (51) and a second mounting plate (52) connected to the second connecting plate (51); The second fixing plate (6) is also provided with a second groove (63) surrounding the flange (62), and the second connecting plate (51) abuts against the bottom of the second groove (63) and is welded together to realize that the second mounting spacer (5) is fixed on the second fixing plate (6).

9. The shielding structure according to any one of claims 1-8, characterized in that, The diameters of the first through hole (11) and the second through hole (21) are both less than or equal to 8 mm.

10. A cooking apparatus comprising the shielding structure according to any one of claims 1-9, characterized in that, It also includes the microwave heating cavity (7) and the convection motor (8), the fan blade (81) being provided on the main shaft of the convection motor (8); it also includes a cooking inner pot and a microwave generating device disposed on the cooking inner pot, the interior of the cooking inner pot enclosing the microwave heating cavity (7). The microwave heating cavity (7) is also provided with a heating element (9), which is sleeved on the periphery of the shielding structure; the microwave heating cavity (7) is also provided with an inner heat insulation plate (71), which is used to cover the heating element (9) and the shielding structure.

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