Convection assembly capable of preventing microwave leakage and cooking equipment

Abstract

The utility model discloses a convection assembly for preventing microwave leakage and cooking equipment, the convection assembly comprises an inner plate, a fan and a motor main body, the inner plate is configured to be a part of a cooking liner; the fan is arranged on one side of the inner plate and located in the cooking inner container. The motor body is arranged on the other side of the inner plate and located outside the cooking inner container. The motor further comprises a motor shaft arranged on the motor body, a through hole is formed in the inner plate, and the motor shaft penetrates through the through hole and is connected with the fan. The motor shaft is made of a non-metal material. Therefore, the metal motor shaft penetrating through the through hole is replaced by the non-metal shaft, and the non-metal shaft is non-conductive and cannot form an antenna effect to lead out the microwaves, so that the microwaves can be prevented from leaking at the through hole to the greatest extent, the influence on the body health of a user is avoided, and the product performance is better and safer.

Description

Technical Field

[0001] This utility model relates to the field of cooking appliance technology, and in particular to a convection component and cooking equipment that prevents microwave leakage. Background Technology

[0002] As people's living standards continue to improve, kitchen appliances are becoming increasingly diverse, with microwave ovens, ovens, and steam ovens gradually becoming necessities for families. However, these appliances not only have relatively limited functions and require considerable kitchen space each, but are also expensive to purchase individually. To effectively utilize kitchen space and reduce costs, the microwave-steam-oven combo has been invented, combining the functions of a microwave, steam oven, oven, and air fryer in one appliance, making it very popular with consumers.

[0003] In existing microwave-steam-grill combination ovens with hot air convection motors, the interior of the cooking cavity is filled with microwaves during operation, which are used to cook food. However, because the cooking cavity is not completely sealed—for example, the door of the microwave-steam-grill combination oven can minimize microwave leakage by installing sealing strips to meet national standards—the interior also contains a fan for convection. This fan requires a power mechanism located outside the cooking cavity, and a connecting shaft is necessary to connect the fan and the power mechanism. This connecting shaft must penetrate the originally sealed cavity. This connecting shaft is usually the motor output shaft and is made of metal. In this case, the connecting shaft can act as an antenna, discharging microwaves, resulting in significant microwave leakage that fails to meet national standards and may even affect the user's health. Utility Model Content

[0004] In order to overcome at least one of the defects mentioned above in the prior art, the present invention provides a convection component and cooking device to prevent microwave leakage. By replacing the metal motor shaft that passes through the through hole with a non-metallic shaft, since the non-metallic shaft is non-conductive, it cannot form an antenna effect to conduct microwaves. Therefore, microwave leakage at the through hole can be avoided to the greatest extent, thereby avoiding any impact on the user's health and making the product performance better and safer.

[0005] The technical solution adopted by this utility model to solve its problem is:

[0006] A microwave leakage-proof convection assembly, comprising:

[0007] The inner panel, which is configured as part of the cooking pot;

[0008] A fan is located on one side of the inner panel and inside the cooking pot.

[0009] The motor body is located on the other side of the inner plate and outside the cooking pot.

[0010] It also includes a motor shaft disposed on the motor body, and a through hole is provided on the inner plate, through which the motor shaft passes and is connected to the fan;

[0011] The motor shaft is made of non-metallic material.

[0012] Furthermore, the motor shaft is a ceramic shaft with added zirconium oxide.

[0013] Furthermore, the motor shaft is also provided with a shim for limiting the fan, and the motor shaft and the shim pass through the through hole and are connected to the fan.

[0014] Furthermore, it also includes a sealing sleeve disposed at the through hole of the inner plate, wherein a through sealing channel is formed inside the sealing sleeve, and the motor shaft passes through the sealing channel and is connected to the fan.

[0015] Furthermore, one end of the sealing sleeve is bent outward to form a flange for attaching to the through hole. A pressure plate is installed on the inner plate, and the pressure plate presses the flange onto the through hole to form a seal. The other end of the sealing sleeve also extends a convex edge, which abuts against the motor body to form a seal.

[0016] Furthermore, it also includes an inner heat insulation plate disposed inside the cooking pot, wherein:

[0017] The inner heat insulation plate has an air intake in the middle and an air blowing outlet around its perimeter;

[0018] A heat insulation cavity is formed between the inner plate and the inner heat insulation plate, and the fan is disposed in the heat insulation cavity and is opposite to the air intake.

[0019] Furthermore, it also includes a shielding cover disposed inside the heat insulation cavity and covering the fan, wherein the end face of the shielding cover has an air inlet and the side face of the shielding cover has an air outlet;

[0020] When the fan is working, the gas inside the cooking liner can flow sequentially through the air intake of the inner heat insulation plate, the air inlet of the shield, the air outlet of the shield, and the air outlet of the inner heat insulation plate to form a circulating flow.

[0021] Furthermore, the inner plate includes a main body and a motor mounting plate, wherein:

[0022] The main body has an opening that connects to the heat insulation cavity and allows the fan to pass through. The motor body is mounted on the motor mounting plate, and the motor mounting plate has the through hole.

[0023] The bottom of the shielding cover has a straight edge, and the main body is also provided with a folded edge that bends into the heat insulation cavity at the opening, and the straight edge is connected to the folded edge.

[0024] Furthermore, the inner plate also includes a connecting ring portion surrounding the outer periphery of the opening, the connecting ring portion being connected to the motor mounting plate portion and forming a mounting groove between them, the mounting groove containing a copper coil.

[0025] In addition, this utility model also provides a cooking device, including the above-mentioned convection component and a cooking inner pot, wherein:

[0026] The cooking inner pot is composed of an upper inner plate, a lower inner plate, a left inner plate, a right inner plate, and a rear inner plate, which are spliced ​​together. The inner plate is one of the upper inner plate, the lower inner plate, the left inner plate, the right inner plate, and the rear inner plate.

[0027] In summary, the microwave leakage prevention convection component and cooking device provided by this utility model have the following technical effects:

[0028] 1) By replacing the metal motor shaft that passes through the through hole with a non-metallic shaft, since the non-metallic shaft is non-conductive, it cannot form an antenna effect to conduct microwaves. Therefore, microwave leakage at the through hole can be avoided to the greatest extent, thereby avoiding any impact on the user's health and making the product performance better and safer.

[0029] 2) By adding zirconium oxide into the ceramic motor shaft, the hardness of the motor shaft can be further improved, thereby preventing the motor shaft from cracking and extending the service life of the motor shaft.

[0030] 3) By setting a sealing sleeve at the through hole of the inner plate, a sealed channel is formed inside the sealing sleeve that allows the motor shaft to pass through, thus ensuring smooth rotation of the motor shaft. While realizing the convection of hot air, the sealing channel can also prevent steam and microwaves from leaking out from the through hole, further improving the safety and reliability of the product.

[0031] 4) By setting a copper coil between the connecting ring of the inner plate and the motor mounting plate, when electromagnetic waves encounter the copper coil, due to the good conductivity of copper, an induced current will be generated on the surface of the copper coil. This induced current will generate a magnetic field opposite to the original electromagnetic wave, thereby canceling or weakening the propagation of the original electromagnetic wave, thus achieving a shielding effect. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the convection component of this utility model;

[0033] Figure 2 This is an exploded view of the convection component of this utility model;

[0034] Figure 3 This is a structural schematic diagram of the convection component of this utility model from another perspective;

[0035] Figure 4 This is a cross-sectional schematic diagram of the convection component of this utility model;

[0036] Figure 5 This is a partial structural schematic diagram of the cooking equipment of this utility model;

[0037] Figure 6 This is an exploded view of a portion of the structure of the cooking equipment of this utility model.

[0038] The meanings of the reference numerals in the attached figures are as follows:

[0039] 1. Convection assembly; 11. Inner panel; 111. Main body; 1111. Opening; 1112. Folded edge; 112. Motor mounting plate; 1121. Through hole; 113. Connecting ring; 114. Copper coil; 12. Inner insulation plate; 121. Air intake; 122. Air outlet; 13. Fan; 14. Convection motor; 141. Motor body; 142. Motor shaft; 143. Gasket; 15. Locking cap; 16. Sealing sleeve; 161. Sealing channel; 162. Flanged edge; 163. Raised edge; 164. Sealing lip; 17. Pressure plate; 18. Shielding cover; 181. Air inlet; 182. Air outlet; 183. Straight edge; 19. Heating element; 2. Cooking equipment; 21. Upper inner panel; 22. Lower inner panel; 23. Left inner panel; 24. Right inner panel. Detailed Implementation

[0040] 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.

[0041] 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 device 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.

[0042] 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.

[0043] Example 1

[0044] See Figure 1-4 This utility model provides a microwave leakage prevention convection assembly 1, including an inner plate 11, an inner heat insulation plate 12, a fan 13, and a convection motor 14. The inner plate 11 is configured as part of the cooking inner pot. The inner heat insulation plate 12 is located inside the cooking inner pot and forms a heat insulation cavity with the inner plate 11. An air intake 121 is provided in the center of the inner heat insulation plate 12, and air outlets 122 are provided around its periphery. The fan 13 is disposed inside the heat insulation cavity and opposite to the air intake 121. The convection motor 14 includes a motor body 141 and a motor shaft 142 connecting the motor body 141. The motor body 141 is disposed outside the heat insulation cavity and outside the cooking inner pot. A through hole 1121 communicating with the heat insulation cavity is provided on the inner plate 11, and the motor shaft 142 passes through the through hole 1121 and is connected to the fan 13. The motor shaft 142 is made of a non-metallic material.

[0045] Based on the above structure, when the convection motor 14 is started, the motor shaft 142 drives the fan 13 to rotate, thereby drawing hot air from the cooking inner pot into the heat insulation cavity through the air intake 121, and then blowing it back into the cooking inner pot through the air outlet 122 to achieve hot air convection, thereby improving the cooking efficiency of food. Preferably, the heat insulation cavity is also equipped with a heating element 19, which can reheat the gas entering the heat insulation cavity. The heated gas then flows back into the cooking inner pot to heat the food, thereby improving the cooking efficiency of food.

[0046] In this embodiment, the air intake 121 is composed of multiple air intake holes, and the air outlet 122 is composed of multiple air outlet holes.

[0047] In the convection component 1 of this utility model, by replacing the metal motor shaft 142 passing through the through hole 1121 with a non-metallic motor shaft 142, since the non-metallic shaft is non-conductive, it cannot form an antenna effect to conduct microwaves. Even if the diameter of the through hole 1121 is large, microwave leakage at the through hole can be avoided to the greatest extent, making the product performance better and safer.

[0048] Preferably, the motor shaft 142 is a ceramic shaft with added zirconium oxide; thus, by adding zirconium oxide into the ceramic motor shaft 142, the hardness of the motor shaft 142 can be further improved, thereby preventing the motor shaft 142 from cracking and extending the service life of the motor shaft 142.

[0049] Of course, in other embodiments, the motor shaft 142 can also be made of other non-metallic materials such as hard plastic, as long as the motor shaft 142 can meet the working strength and hardness requirements, and there are no restrictions here.

[0050] See Figure 2 The motor shaft 142 is also equipped with a gasket 143 for limiting the fan 13. The motor shaft 142 and the gasket 143 pass through the through hole 1121 of the inner plate 11 and are connected to the fan 13. It is understandable that since the gasket needs to pass through the through hole 1121, the diameter of the through hole 1121 needs to be made larger, which results in a larger gap between the through hole 1121 and the motor shaft 142. However, since the motor shaft 142 is a non-metallic motor shaft 142, it cannot conduct microwaves. Therefore, it can prevent microwaves from leaking out through the gap between the motor shaft 142 and the through hole 1121 to the greatest extent, thereby ensuring the safety of product use.

[0051] The device also includes a locking cap 15, which has an internally threaded mounting hole. The outer side wall of the end of the motor shaft 142 has an external thread that matches the internal thread. Thus, when the fan 13 is fitted onto the end of the motor shaft 142, the locking cap 15 can be threadedly connected to the end of the motor shaft 142 to lock and fix the fan 13 onto the motor shaft 142.

[0052] See Figure 2 and Figure 4 To further improve the shielding of the through hole 1121, this application also provides a sealing sleeve 16 at the through hole 1121. The sealing sleeve 16 has a through sealing channel 161 formed inside, through which the motor shaft 142 passes and is connected to the fan 13. A certain gap is left between the motor shaft 142 and the sealing channel 161 to ensure the smooth rotation of the motor shaft 142. In addition, one end of the sealing sleeve 16 is bent outward to form a flange 162, which is hooked on the through hole 1121 to achieve a limit, and the flange 162 abuts against the front end face of the inner plate 11 to achieve a seal. The other end of the sealing sleeve 16 also extends a convex edge 163, which abuts against the motor body 141 to form a seal.

[0053] Therefore, by providing a sealing sleeve 16 at the through hole 1121, this application can prevent steam and microwave leakage at the through hole 1121, thereby further improving the safety and reliability of the product.

[0054] Of course, in order to further improve the assembly stability of the sealing sleeve 16, a sealing lip 164 is provided at one end of the sealing sleeve 16. The sealing lip 164 can abut against the rear end face of the inner plate 11 to limit the sealing sleeve 16.

[0055] In this embodiment, a pressure plate 17 is installed on the inner plate 11, which presses the flange 162 against the through hole of the inner plate 11 to achieve a tight seal.

[0056] See also Figure 2 and Figure 4 To further improve the microwave shielding of the convection assembly 1, the convection assembly 1 also includes a shielding cover 18 disposed inside the heat insulation cavity and covering the fan 13. The shielding cover 18 has an air inlet 181 on its end face and an air outlet 182 on its side. The heating element 19 is arranged around the outer periphery of the side of the shielding cover 18. Preferably, the air inlet 181 consists of multiple air inlets, and the air outlet 182 consists of multiple air outlets. To prevent microwaves from entering the shielding cover 18 through the air inlets and outlets, the diameter of both the air inlets and outlets is less than or equal to 5 mm, thereby effectively preventing microwaves from entering the shielding cover 18 and leaking out through the through-hole 1121.

[0057] Therefore, when the convection motor 14 is started to drive the fan 13, the gas in the cooking liner can flow sequentially through the air intake 121 of the inner heat insulation plate 12, the air inlet 181 of the shield 18, the air outlet 182 of the shield 18, and the air outlet 122 of the inner heat insulation plate 12 to form a circulating flow.

[0058] See also Figure 2-4 In this application, the inner plate 11 includes a main body 111, a motor mounting plate 112, and a connecting ring 113. The main body 111 has an opening 1111 that communicates with the heat insulation cavity and allows the fan 13 to pass through. The connecting ring 113 is mounted on the main body 111 and surrounds the outer periphery of the opening 1111. The motor mounting plate 112 is mounted on the connecting ring 113 and covers the opening 1111. Specifically, the motor body 141 is mounted on the motor mounting plate 112, and the motor mounting plate 112 has the aforementioned through hole 1121 through which the motor shaft 142 and the gasket 143 pass.

[0059] Based on the above structure, when this product needs to be assembled, the convection motor 14 can be connected to the motor mounting plate 112 first, then the fan 13 can be installed on the motor shaft 142, then the fan 13 can be passed through the opening 1111 so that the fan 13 is located in the heat insulation cavity, and finally the motor mounting plate 112 can be installed on the connecting ring 113 to complete the assembly.

[0060] The bottom of the shielding cover 18 has a straight edge 183, and the main body 111 has a folded edge 1112 bent into the heat insulation cavity at the opening 1111. The straight edge 183 is connected to the folded edge 1112. Preferably, the straight edge 183 and the folded edge 1112 are connected by welding.

[0061] Furthermore, a mounting groove is formed between the connecting ring portion 113 and the motor mounting plate portion 112, and a copper coil 114 is provided in the mounting groove. Thus, by providing the copper coil 114, when an electromagnetic wave encounters the copper coil 114, due to the good conductivity of copper, an induced current will be generated on the surface of the copper coil. This induced current will generate a magnetic field opposite to the original electromagnetic wave, thereby canceling or weakening the propagation of the original electromagnetic wave, thus achieving a shielding effect.

[0062] Therefore, by providing the copper coil 114, microwave leakage can be prevented from passing through the gap between the connecting ring 113 and the motor mounting plate 112, thereby improving the safety of the product.

[0063] In summary, this application achieves triple shielding of microwaves by replacing the motor shaft 142 with a non-metallic shaft, providing a sealing sleeve 16 at the through hole 1121, and covering the fan 13 with a shielding cover 18, thereby ensuring that microwaves will not leak out from the through hole 1121. In addition, by providing a copper coil 114 between the connecting ring 113 and the motor mounting plate 112, this application ensures that microwaves will not leak out from the mounting gap of the inner plate 11, thereby achieving all-round shielding of microwaves and ensuring the safety of product use.

[0064] Example 2

[0065] See Figure 5-6 The present invention also provides a cooking device, including the convection component 1 of the above embodiment and a cooking inner pot; wherein, the cooking inner pot is formed by splicing together an upper inner plate 21, a lower inner plate 22, a left inner plate 23, a right inner plate 24 and a rear inner plate, and the inner plate 11 in the convection component 1 is one of the upper inner plate 21, the lower inner plate 22, the left inner plate 23, the right inner plate 24 and the rear inner plate.

[0066] Specifically, the upper inner plate 21, lower inner plate 22, left inner plate 23, and right inner plate 24 are integrally formed and form a U-shaped frame, with the rear inner plate connected to the rear side of the U-shaped frame. In this embodiment, the inner plate 11 in the convection assembly 1 is the rear inner plate. Thus, when the fan 13 is working, the gas inside the cooking liner can enter the inner insulation cavity through the air intake 121 of the inner insulation plate 12, and after being diffused in all directions by the fan 13, it is diffused to various angles of cooking through the air outlet 122 of the inner insulation plate 12.

[0067] Furthermore, the cooking device in this application is specifically a microwave-steam oven, which also includes a water tank and a steam generator installed on the inner cooking cavity. The steam generator is connected to the interior of the inner cooking cavity to deliver high-temperature steam to the interior of the inner cooking cavity during operation, thereby cooking the food inside the inner cooking cavity and realizing a separate steaming function. In addition, it also includes a heating element placed on the inner cooking cavity, which can directly heat the food inside the inner cooking cavity to realize a separate baking function. Furthermore, it includes a microwave generator placed on the inner cooking cavity to generate microwaves and introduce them into the inner cooking cavity to heat the food, thereby realizing a separate microwave function. Of course, the above-mentioned microwave, steaming and / or heating functions can also be combined together, such as combining the heating element with the steam generator, or combining the heating element with the microwave function, or combining the heating element, microwave and steam functions, all of which are feasible and not limited in this application.

[0068] In summary, the microwave leakage prevention convection component 1 and cooking device provided by this utility model have the following technical effects:

[0069] 1) By replacing the traditional metal motor shaft 142 with a non-metallic motor shaft 142, since the non-metallic shaft is non-conductive, it cannot form an antenna effect to conduct microwaves. Therefore, microwave leakage at the through hole 1121 can be avoided to the greatest extent, thereby avoiding the impact on the user's health and making the product performance better and safer.

[0070] 2) By adding zirconium oxide into the ceramic motor shaft 142, the hardness of the motor shaft 142 can be further improved, thereby preventing the motor shaft 142 from cracking and extending the service life of the motor shaft 142.

[0071] 3) By setting a sealing sleeve 16 at the through hole 1121 of the inner plate 11, a sealing channel is formed inside the sealing sleeve 16 that allows the motor shaft 142 to pass through, thereby ensuring smooth rotation of the motor shaft 142. While realizing the convection of hot air, the sealing channel can also prevent steam and microwaves from leaking from the through hole 1121, thereby improving the safety and reliability of the product.

[0072] 4) By setting a copper coil 114 between the connecting ring 113 of the inner plate 11 and the motor mounting plate 112, when electromagnetic waves encounter the copper coil 114, due to the good conductivity of copper, an induced current will be generated on the surface of the copper coil. This induced current will generate a magnetic field opposite to the original electromagnetic wave, thereby canceling or weakening the propagation of the original electromagnetic wave, thus achieving a shielding effect.

[0073] 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 convection assembly for preventing microwave leakage, characterized in that, include: The inner panel, which is configured as part of the cooking pot; A fan is located on one side of the inner panel and inside the cooking pot. The motor body is located on the other side of the inner plate and outside the cooking pot. It also includes a motor shaft disposed on the motor body, and a through hole is provided on the inner plate, through which the motor shaft passes and is connected to the fan; The motor shaft is made of non-metallic material.

2. The convection component according to claim 1, characterized in that: The motor shaft is a ceramic shaft with added zirconium oxide.

3. The convection component according to claim 1 or 2, characterized in that: The motor shaft is also provided with a shim for limiting the fan. The motor shaft and the shim pass through the through hole and are connected to the fan.

4. The convection component according to claim 1 or 2, characterized in that: It also includes a sealing sleeve disposed at the through hole of the inner plate, wherein a through sealing channel is formed inside the sealing sleeve, and the motor shaft passes through the sealing channel and is connected to the fan.

5. The convection component according to claim 4, characterized in that: One end of the sealing sleeve is bent outward to form a flange for attaching to the through hole. A pressure plate is installed on the inner plate, which presses the flange onto the through hole to form a seal. The other end of the sealing sleeve also extends a convex edge, which abuts against the motor body to form a seal.

6. The convection component according to claim 1 or 2, characterized in that, It also includes an inner heat insulation plate installed inside the cooking pot, wherein: The inner heat insulation plate has an air intake in the middle and an air blowing outlet around its perimeter; A heat insulation cavity is formed between the inner plate and the inner heat insulation plate, and the fan is disposed in the heat insulation cavity and is opposite to the air intake.

7. The convection component according to claim 6, characterized in that: It also includes a shielding cover disposed inside the heat insulation cavity and covering the fan, wherein the end face of the shielding cover has an air inlet and the side face of the shielding cover has an air outlet; When the fan is working, the gas inside the cooking liner can flow sequentially through the air intake of the inner heat insulation plate, the air inlet of the shield, the air outlet of the shield, and the air outlet of the inner heat insulation plate to form a circulating flow.

8. The convection component according to claim 7, characterized in that: The inner plate includes a main body and a motor mounting plate, wherein: The main body has an opening that connects to the heat insulation cavity and allows the fan to pass through. The motor body is mounted on the motor mounting plate, and the motor mounting plate has the through hole. The bottom of the shielding cover has a straight edge, and the main body is also provided with a folded edge that bends into the heat insulation cavity at the opening, and the straight edge is connected to the folded edge.

9. The convection component according to claim 8, characterized in that: The inner plate also includes a connecting ring portion surrounding the outer periphery of the opening, the connecting ring portion being connected to the motor mounting plate portion and forming a mounting groove between them, the mounting groove containing a copper coil.

10. A cooking device, characterized in that: Includes the convection component and cooking liner as described in any one of claims 1-9, wherein: The cooking inner pot is composed of an upper inner plate, a lower inner plate, a left inner plate, a right inner plate, and a rear inner plate, which are spliced ​​together. The inner plate is one of the upper inner plate, the lower inner plate, the left inner plate, the right inner plate, and the rear inner plate.

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