A microwave oven cooking device with a self-heating cover
By incorporating a combination of a metal layer and a heating layer inside the microwave oven, the problems of moisture loss and uneven heating during microwave cooking are solved, achieving uniform heating and efficient cooking while reducing the risk of burns and operational complexity.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- HAIFENG JINGHUI PLASTIC TOYS CO LTD
- Filing Date
- 2026-06-04
- Publication Date
- 2026-07-21
AI Technical Summary
Existing microwave ovens suffer from excessive moisture loss and large temperature differences between the inside and outside of food during cooking, resulting in a dry and hard exterior and insufficient heating inside. In addition, multi-functional microwave ovens are expensive, complicated to operate, and the evaporation of additional moisture is uncontrollable.
This microwave oven cooker features a built-in heating cover. By combining a metal layer and a heating layer inside the microwave oven, it blocks some microwaves and creates a relatively enclosed space. The heating layer forms an independent heat source, slowing down moisture evaporation and reducing temperature differences, thus ensuring even heating of food.
It achieves reduced food moisture loss and heating temperature differences in a single-function microwave oven, improves cooking efficiency, ensures good food taste, is easy to operate, reduces the risk of burns, and is low in cost.
Smart Images
Figure CN122423748A_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the technical field of microwave oven cooking appliances, specifically relating to a microwave oven cooking appliance with a self-heating cover. Background Technology
[0002] With the increasing popularity of microwave ovens and the improvement of people's quality of life, the application scenarios of microwave ovens are no longer limited to reheating food, and they have gradually developed into one of the main cooking tools in the kitchen.
[0003] However, due to the inherent limitations of microwave heating principles, excessive moisture loss and large local temperature differences inevitably occur during the cooking process, resulting in a dry and hard exterior and insufficient internal heating, which adversely affects the final cooking effect.
[0004] Current technologies primarily employ three types of solutions: The first involves reducing microwave power to slow down moisture loss and heat transfer. However, reducing power prolongs cooking time and may cause some areas of the food to miss their optimal cooking state, resulting in poor taste. The second type uses multi-functional microwave ovens, which automatically adjust microwave power during cooking and add steam or activate baking functions as needed to achieve better results. However, compared to ordinary single-function microwave ovens, multi-functional microwave ovens are more expensive, take up more space, and have a more complex and cumbersome operation process, raising the barrier to entry for users. The third type involves adding extra water to the cooking vessel to slow down the rate of moisture evaporation from the food, using this evaporation to regulate the heating speed. However, the moisture evaporation process in this method is uncontrollable and prone to excessive steam, which can negatively impact the cooking results. Summary of the Invention
[0005] To address the shortcomings of existing technologies, this invention provides a microwave oven cooker with a self-heating cover. With its combined structure featuring a metal layer, a heating layer, and a relatively enclosed space formed by the top cover and the second pot, it can achieve cooking effects that reduce moisture loss and minimize the temperature difference between the inside and outside of food using only a single-function microwave oven. This results in juicier and more delicious food after cooking, while maintaining heating efficiency and shortening cooking time. Furthermore, its overall operation is simple; the nested arrangement of the first and second pots reduces the risk of burns during use.
[0006] The technical effects to be achieved by this invention are realized through the following technical aspects: This invention provides a microwave oven cooker with a self-heating cover, comprising: The first pot body is equipped with a receiving cavity; A second pot body is disposed in the receiving cavity. The second pot body is provided with a cooking cavity and a pot opening. The cooking cavity is connected to the outside through the pot opening. A lid, which covers the opening of the pot, the lid comprising a first plate and a surrounding edge, the surrounding edge extending from the edge of the first plate toward the second pot body; and A heating cover is disposed inside the cooking cavity. The heating cover has a second plate body, which includes a stacked heating layer and a metal layer, with the metal layer facing the bottom of the second pot body. The surrounding edge abuts against and seals the upper edge of the second pot body; microwaves pass through the first pot body and the second pot body in sequence and enter the cooking cavity; the metal layer blocks part of the microwaves from being transmitted toward the bottom of the cooking cavity; and the heating layer is heated by microwaves.
[0007] In some implementations, the heating cover has a side plate that surrounds the edge of the second plate, and the metal layer is surrounded by the side plate; the metal layer does not abut against the second pot body.
[0008] In some implementations, the second plate further includes a baking layer disposed on the side of the metal layer facing the bottom of the second pot body, and the baking layer is attached to the metal layer and surrounded by the side plate.
[0009] In some implementations, the baking layer is provided with a heating boss, which is located at the bottom of the baking layer and protrudes towards the bottom of the second pot body.
[0010] In some implementations, the heating cover is further provided with a support block and a lifting plate. The support block is formed by the side plate extending toward the bottom of the second pot body and abutting against the inner wall of the second pot body. The lifting plate is formed by the top of the second plate body extending toward the top cover.
[0011] In some implementations, the second pot body is provided with a through hole located at the bottom of the second pot body, and a storage space is formed between the bottom of the first pot body and the bottom of the second pot body. The storage space and the cooking cavity are connected through the through hole.
[0012] In some implementations, the second pot body further includes a support foot disposed within the storage space and abutting against the bottom of the first pot body.
[0013] In some implementations, the top of the first pot body is provided with an annular groove facing the receiving cavity, and the outer wall of the second pot body is provided with a protruding ring, which is engaged in the annular groove.
[0014] In some implementations, the first pot body and the second pot body are respectively provided with a first handle and a second handle. The first handle is provided on the outer edge of the first pot body; the second handle is formed by extending obliquely outward from the outer side of the second pot body, and the second handle is aligned with the first handle, and the second handle does not abut against the first handle.
[0015] In some implementations, the top cover is provided with a boss and a pressure relief hole. The boss is located on the top of the first plate, and the pressure relief hole is provided through the boss. The cooking cavity is connected to the outside through the pressure relief hole.
[0016] In summary, the present invention has at least the following advantages: 1. The microwave oven cooker with a self-heating cover provided by this invention has a metal layer that blocks some microwaves, reducing the efficiency of microwave heating of food, slowing down the rate of moisture evaporation, and reducing the temperature difference between the inside and outside of the food. The heating layer absorbs microwaves and heats up, forming a heat source on the outside of the food, heating the food from the outside in and improving cooking efficiency. The top cover and the second pot body form a relatively sealed space. With the synergistic effect of the heating layer, the water vapor in the cooking cavity quickly reaches a saturated state, inhibiting the evaporation of moisture from the food. At the same time, the high-temperature water vapor can also provide a stable heating temperature, improving heating efficiency and ensuring that the food is heated evenly.
[0017] 2. The microwave oven cooker with a self-heating cover provided by this invention allows users to achieve excellent cooking results without frequently adjusting the microwave's output power or the position of various components after food is placed inside and the microwave is turned on, simplifying the operation process. Furthermore, the overall number of parts is small, making it easy to clean and store, and facilitating maintenance and use.
[0018] 3. The microwave oven cooker with a self-heating cover provided by the present invention allows microwaves to penetrate both the first and second pots, while the cooker itself is not heated by microwaves. The heating process is completed inside the cooking cavity, and the heat must pass through the second pot to the first pot, forming a good heat insulation structure and effectively reducing the risk of burns during use. Attached Figure Description
[0019] Figure 1 This is an axonometric view of the microwave oven cooker with a self-heating cover in Example 1.
[0020] Figure 2 This is an exploded assembly view of the microwave oven cooker with its own heating cover in Example 1.
[0021] Figure 3 for Figure 1 AA section view in the image.
[0022] Figure 4 for Figure 1 BB section view in the middle.
[0023] Figure 5 for Figure 3 A magnified view of point C in the image.
[0024] Figure 6 for Figure 3 A magnified view of point D in the image.
[0025] Figure 7 This is an axonometric view of the top cover in Example 2.
[0026] Figure 8 for Figure 7 EE section view in the image.
[0027] Figure 9 This is an axonometric view of the microwave oven cooker with a self-heating cover in Example 3.
[0028] Figure 10 for Figure 9 FF section view in the image.
[0029] Marked in the image: 100. Microwave oven cookers with self-heating covers; 1. First pot body; 11. Receiving cavity; 12. Storage space; 13. First handle; 14. Annular groove; 2. Second pot body; 21. Cooking cavity; 22. Pot opening; 23. Through hole; 24. Support foot; 25. Second handle; 26. Protruding ring; 3. Top cover; 31. First plate; 32. Surrounding edge; 33. Boss; 331. Pressure relief groove; 332. Side vent; 34. Pressure relief hole. 4. Heating cover; 41. Second plate; 411. Heating layer; 412. Metal layer; 413. Baking layer; 4131. Heating boss; 42. Side plate; 43. Support block; 44. Lifting plate. 5. Pressure boosting components. Detailed Implementation
[0030] To facilitate understanding of the present invention, a more comprehensive description will be given below in conjunction with the accompanying drawings and specific embodiments. The drawings illustrate preferred embodiments of the invention. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a thorough and complete understanding of the disclosure of the invention.
[0031] It should be noted that when a component is said to be "fixed to" another component, it can be directly attached to the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component.
[0032] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use. They are only for the convenience of describing this invention 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, and therefore should not be construed as a limitation of this invention. In addition, the terms "first," "second," "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.
[0033] 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 in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
[0034] Example 1: Please see Figures 1-6 This embodiment provides a microwave oven cooker 100 with a self-heating cover, which can be used to cook food using a single-function microwave oven. The microwave oven cooker 100 with a self-heating cover includes a first pot body 1, a second pot body 2, a top cover 3, and a heating cover 4. The second pot body 2 is disposed inside the first pot body 1, the top cover 3 covers the second pot body 2, and the heating cover 4 is disposed inside the second pot body 2. Specifically, the first pot body 1 has a receiving cavity 11, and the second pot body 2 is disposed in the receiving cavity 11. The second pot body 2 has a cooking cavity 21 and a pot opening 22, the cooking cavity 21 communicating with the outside through the pot opening 22. The top cover 3 covers the pot opening 22, and the top cover 3 includes a first plate 31 and a surrounding edge 32, the surrounding edge 32 extending from the edge of the first plate 31 toward the second pot body 2. A heating cover 4 is disposed inside the cooking cavity 21. The heating cover 4 has a second plate 41, which includes a heating layer 411 and a metal layer 412 stacked together, with the metal layer 412 facing the bottom of the second pot body 2. More specifically, the surrounding edge 32 abuts against and seals the upper edge of the second pot body 2, making the cooking cavity 21 a relatively sealed space. Microwaves pass sequentially through the first pot body 1 and the second pot body 2 into the cooking cavity 21. The metal layer 412 blocks some of the microwaves from being transmitted towards the bottom of the cooking cavity 21, and the heating layer 411 is heated by the microwaves.
[0035] Before heating, the microwave oven 100 with its self-heating cover has a second pot 2 placed inside the receiving cavity 11 of the first pot 1. Food is first placed at the bottom of the second pot 2 through the pot opening 22, and then the heating cover 4 is placed on top of the food. The heating cover 4 may or may not touch the food. The top cover 3 is then closed at the pot opening 22, with its edge 32 abutting and sealing the upper edge of the second pot 2. The entire assembly is then placed in the microwave oven, and the microwave oven is turned on. The microwaves generated inside the microwave oven pass through the first pot 1 and the second pot 2 sequentially from the outside to the inside into the cooking cavity 21, heating the food in the cooking cavity 21.
[0036] Because the food is positioned below the heating cover 4, the metal layer 412 blocks some microwaves from reaching the bottom of the cooking cavity 21. The food can only receive microwaves from other directions, reducing the heating efficiency of the food. Due to the reduced microwave heating efficiency, the temperature difference and temperature rise between the inside and outside of the food are slowed down, improving the uniformity of heating. Simultaneously, because the amount of microwaves received is reduced, the number of water molecules evaporating from the food is also reduced, slowing down the rate of moisture evaporation.
[0037] On the other side of the metal layer 412, the heating layer 411 can be heated by microwaves. Microwaves directed at the heating layer 411 and reflected from the metal layer 412 are simultaneously absorbed by the heating layer 411, causing its temperature to rise rapidly. The heated layer 411 forms an independent heat source within the cooking cavity 21, and its outward heat radiation heats the food surface, improving the heating efficiency. Since the heat of the heating layer 411 originates from microwaves, this ensures high utilization of microwaves during the heating process.
[0038] The top cover 3 closes onto the pot opening 22, creating a relatively sealed space between the top cover 3 and the second pot body 2. The water vapor generated by food evaporation is essentially confined within the cooking cavity 21. When the water vapor in the cooking cavity 21 reaches a certain density, it tends to become saturated, thus preventing further evaporation of moisture from the food. Most of the moisture remains within the food, reducing moisture loss. Simultaneously, the heating layer 411 also supports this water vapor environment. Specifically, the temperature of the heating layer 411 after microwave heating is often higher than the temperature at which moisture evaporates, stimulating the water vapor to remain in a gaseous state and maintaining the water vapor concentration within the cooking cavity 21 to inhibit moisture evaporation from the food. Furthermore, the high-temperature water vapor in the cooking cavity 21 also heats the food, enhancing heating efficiency while maintaining the external temperature of the food, resulting in more uniform and stable heating both inside and out.
[0039] After the cooking process described above, the food inside the cooking cavity 21 has an excellent appearance and good consistency inside and out. Furthermore, due to minimal moisture loss, the texture of the ingredients is improved, enhancing the overall presentation of food cooked in a single-function microwave oven. The cooking process is automatic, eliminating the need for users to frequently adjust the microwave's output power or the positions of components during cooking, thus achieving excellent cooking results and simplifying the operation. In addition, due to the small number of parts, the microwave oven cooker 100, including its own heating cover, is easy to clean and store.
[0040] In addition to the effects mentioned above, the heating layer 411 reaches a temperature above 100°C after continuous microwave heating. As heat is transferred, the entire second plate 41 is heated to above 100°C, typically between 120°C and 180°C. Food located below the second plate 41 is affected by the heat radiation emitted from it, resulting in a baking effect. The surface of the food facing the second plate 41 is prone to Maillard reactions or caramelization, giving the food a caramelized aroma and enriching its texture and flavor.
[0041] Microwaves can pass through the first pot body 1 and the second pot body 2 to heat the food inside the cooking cavity 21. This means that both the first pot body 1 and the second pot body 2 have high microwave transmittance, making them less susceptible to microwave heating. The entire heating process primarily occurs within the cooking cavity 21; heat must pass through the second pot body 2 to be transferred to the outermost first pot body 1, forming a good heat insulation structure. This makes it safer for users to handle the food after heating, reducing the risk of burns or other accidents.
[0042] During production, the first pot body 1 and the second pot body 2 are often made of materials with poor microwave heating characteristics, such as transparent silicone, glass, and plastic. Considering the molding characteristics of each material, in this embodiment, the first pot body 1 is a transparent silicone part, while the second pot body 2 is an SPS (Syndiotactic Polystyrene) molded part. Microwaves easily penetrate silicone and SPS materials, especially SPS, which has a lower dielectric loss factor than silicone. SPS, as a type of plastic, has excellent structural strength, chemical stability, and high-temperature resistance, making it suitable for providing a stable environment for food cooking and processing. At the same time, SPS has good flowability and low density, allowing the second pot body 2 to be thinner and lighter. The first pot body 1, made of silicone, has good heat insulation, anti-slip properties, and cushioning properties, better meeting the user's safety needs.
[0043] Furthermore, the heating cover 4 is provided with a side plate 42, which surrounds the edge of the second plate 41, and the metal layer 412 is surrounded by the side plate 42. The side plate 42 is located on the side of the metal layer 412 to prevent the metal layer 412 from directly slipping and bumping against the inner wall of the second pot body 2 during use. Because metal has good thermal conductivity and heats up quickly, the metal layer 412 does not contact the second pot body 2, especially not the bottom of the second pot body 2, so the heat from the metal layer 412 will not be transferred to the second pot body 2 too quickly. In addition, the fact that the metal layer 412 does not contact the second pot body 2 also provides some space for food placement.
[0044] Considering that the food beneath the second plate 41 will experience a baking effect when its temperature exceeds 100°C, in this embodiment, the second plate 41 further includes a baking layer 413. The baking layer 413 is disposed on the side of the metal layer 412 facing the bottom of the second pot body 2, and is attached to the metal layer 412. The baking layer 413 can be made of stainless steel suitable for microwave ovens. Similar to the metal layer 412, the baking layer 413 is also surrounded by a side panel 42 to prevent scratches or collisions between the sides of the baking layer 413 and the second pot body 2. The baking layer 413 may or may not be in contact with the food. After the heating layer 411 is heated by microwaves, the heat is transferred through the metal layer 412 to the baking layer 413, and then radiates heat from the bottom surface of the baking layer 413 towards the food. When the baking layer 413 is not in contact with the food, the heat radiation from the baking layer 413 achieves indirect baking of the food. When the baking layer 413 comes into contact with food, it produces a grilling effect similar to that of a traditional hot pan. Of course, in some embodiments, the baking layer 413 can be detached from the second plate 41 to facilitate cleaning after use.
[0045] To enhance the baking effect of the baking layer 413, in some embodiments, the baking layer 413 is provided with heating protrusions 4131. These protrusions 4131 are located at the bottom of the baking layer 413 and protrude towards the bottom of the second pot body 2. By creating different distances from the food, the heating protrusions 4131 create baking textures on the food surface. In this embodiment, the heating protrusions 4131 are evenly distributed. When the baking layer 413 bakes the food, the food surface at the location corresponding to the heating protrusion 4131 is darker and more caramelized, while the surface at other locations is lighter in color.
[0046] In this embodiment, in addition to the second plate 41 and side plate 42 described above, the heating cover 4 is also provided with a support block 43 and a lifting plate 44. The support block 43 extends from the side plate 42 toward the bottom of the second pot body 2 and abuts against the inner wall of the second pot body 2. The support block 43 reduces the contact area between the heating cover 4 and the second pot body 2, thereby reducing heat conduction from the high-temperature heating cover 4 to the second pot body 2. The lifting plate 44 extends from the top of the second plate 41 toward the top cover 3 to facilitate the insertion or removal of the heating cover 4 from the cooking cavity 21.
[0047] It should be noted that the arrangement of food between the heating cover 4 and the second pot body 2 in this embodiment is a cooking method of the microwave oven, suitable for foods with low moisture content, thicker thicknesses, or foods just taken out of the freezer. Considering the heating efficiency and upper temperature limit of the heating layer 411, thinner foods, such as thin slices of bacon, or foods with high fat and moisture content, such as marinated meat slices and vegetables, can also be placed on top of the second plate body 41 for heating. Under microwave heating, the area above the second plate body 41 will produce a frying effect similar to that of a traditional frying pan. Of course, in addition to this, the food can be placed according to its cooking needs. For example, meat can be placed below the heating cover 4, while appropriate flavorings can be placed on top of the second plate body 41, allowing the food to obtain its aroma without mixing with the spices. Since there are many ways to cook food, other cooking methods will not be detailed here.
[0048] Furthermore, considering the high moisture and oil content inside the food, the second pot body 2 in this embodiment is provided with a through hole 23. The through hole 23 is located at the bottom of the second pot body 2, forming a storage space 12 between the bottom of the first pot body 1 and the bottom of the second pot body 2. The storage space 12 and the cooking cavity 21 are connected through the through hole 23. When the water inside the food is saturated with steam in the cooking cavity 21, some of the moisture cannot evaporate and will flow out of the food. Simultaneously, oil will also overflow from the food during heating. With the through hole 23 in the second pot body 2, excess moisture and oil flow into the storage space 12 through the through hole 23, making the cooked food more fragrant and less greasy. Of course, for foods lacking moisture, a certain amount of water can be placed in the storage space 12. During microwave heating, the water in the storage space 12 is heated and evaporated to replenish the steam in the cooking cavity 21, increasing the steam saturation rate in the cooking cavity 21 and promptly reducing moisture loss from the food.
[0049] Because of the storage space 12, the bottom of the second pot body 2 is suspended inside the first pot body 1. To ensure stability before and after use, the second pot body 2 in this embodiment also includes a support foot 24. The support foot 24 is disposed inside the storage space 12 and abuts against the bottom of the first pot body 1. Through the support foot 24, the second pot body 2 can be stably abutted against the first pot body 1.
[0050] In addition to support by the support feet 24, in this embodiment, the top of the first pot body 1 has an annular groove 14 facing the receiving cavity 11, and the outer wall of the second pot body 2 has a protruding ring 26, which is engaged in the annular groove 14. The engagement of the protruding ring 26 with the annular groove 14 makes the connection of the second pot body 2 within the first pot body 1 more accurate and stable. When taking out the microwave oven cooker 100 with its own heating cover, it can be moved by grasping the outer side of the first pot body 1 where the annular groove 14 is located.
[0051] In this embodiment, to further improve ease of use, the first pot body 1 and the second pot body 2 are respectively provided with a first handle 13 and a second handle 25. The first handle 13 is located on the outer edge of the first pot body 1, while the second handle 25 extends obliquely outward from the outer side of the second pot body 2. The second handle 25 is aligned with the first handle 13, but the second handle 25 does not abut against the first handle 13. Under normal circumstances, the user can lift the entire appliance by grasping the first handle 13. However, considering that the first handle 13 may be made of a relatively soft material (i.e., the aforementioned case of using silicone), the second handle 25 is provided to provide better shape support. That is, after the first handle 13 deforms, it abuts against the aligned second handle 25, and the second handle 25 is not easily deformed, making it more stable for the user to lift. Since the first handle 13 and the second handle 25 do not abut against each other, it ensures that the heat of the second pot body 2 is not easily transferred to the first handle 13, reducing the temperature of the first handle 13. In most cases, the user can remove the entire cooker without the assistance of heat-resistant gloves or other tools. In addition, considering that the convex ring 26 of the second pot body 2 may be held tightly by the annular groove 14 due to thermal expansion and contraction and is not easy to detach, the first handle 13 and the second handle 25 are provided to facilitate the separation of the first pot body 1 and the second pot body 2.
[0052] In summary, the microwave oven cooker with a self-heating cover provided in this embodiment utilizes a metal layer that blocks some microwaves, reducing the rate at which food is heated by microwaves, slowing down moisture evaporation, and minimizing the temperature difference between the inside and outside of the food. The heating layer absorbs microwaves and heats up, forming an independent heat source on the outside of the food, heating it from the outside in and improving cooking efficiency. The top cover and the second pot body form a relatively sealed space, and with the synergistic effect of the heating layer, the water vapor in the cooking cavity quickly reaches saturation, inhibiting moisture evaporation from the food. Simultaneously, the high-temperature water vapor provides a stable heating temperature, improving heating efficiency and ensuring even heating of the food.
[0053] Secondly, the microwave oven cooker with its own heating cover provided in this embodiment allows users to achieve excellent cooking results without frequently adjusting the microwave's output power or the position of various components after food is placed inside and the microwave is turned on, making the operation process simple. Furthermore, the overall number of parts is small, facilitating maintenance and use.
[0054] In addition, in this microwave oven with a self-heating cover, both the first and second pots can be penetrated by microwaves, and they are not heated by microwaves. The heating process is completed inside the cooking cavity, and the heat needs to pass through the second pot to the first pot. This provides good heat insulation and reduces the risk of burns during use.
[0055] Example 2: Please Figures 1-6 Based on the above Figures 7-8 This embodiment provides a microwave oven cooker 100 with a self-heating cover, which is an adjustment and optimization based on Embodiment 1. Unlike Embodiment 1, the top cover 3 of this embodiment has a protrusion 33 and a pressure relief hole 34. The protrusion 33 is located on the top of the first plate 31, and the pressure relief hole 34 is disposed through the protrusion 33, allowing the cooking cavity 21 to communicate with the outside through the pressure relief hole 34. The user can grasp the protrusion 33 to move the top cover 3 away or close it at the pot opening 22. During microwave heating, the cooking cavity 21 forms a relatively sealed space under the closed seal of the top cover 3. As the temperature rises, the air pressure inside the cooking cavity 21 gradually increases. The addition of the pressure relief hole 34 effectively balances the pressure difference inside and outside the cooking cavity 21, ensuring the safety and positional stability of the top cover 3 during heating.
[0056] It should be noted that the pressure relief hole 34 also releases water vapor from the cooking cavity 21 to some extent, affecting the balance of water vapor within the cooking cavity 21. Therefore, the pressure relief hole 34 should be installed on the top cover 3 with a smaller diameter. In other cases where pressurization is required, a structure similar to a pressure valve can be added to the top of the pressure relief hole 34 to achieve a pressurizing effect within the cooking cavity 21. The specific structure can refer to the principle and structure of a pressure cooker, but the specific structure will not be detailed in this embodiment. In addition, in this embodiment, in order to improve the airtightness of the cooking cavity 21, in addition to making the pressure relief hole 34 smaller, the first plate 31, the surrounding edge 32, and the boss 33 of the top cover 3 are integrally formed and can be made of transparent glass or ceramic. By increasing the weight, the pressure resistance of the surrounding edge 32 against the upper edge of the second pot body 2 is directly increased, improving the sealing effect between the top cover 3 and the second pot body 2, and also increasing the upper pressure limit within the cooking cavity 21.
[0057] Example 3: Please Figures 1-8 Based on the above Figures 9-10This embodiment provides a microwave oven cooker 100 with a self-heating cover. Unlike embodiment 2, this embodiment's microwave oven cooker 100 with a self-heating cover further includes a pressure boosting component 5. A boss 33 on the top cover 3 has a pressure relief groove 331 and a side vent 332. The pressure relief groove 331 is located on the top of the boss 33, and the side vent 332 is located on the side of the boss 33 and communicates with the pressure relief groove 331. The pressure boosting component 5 is snapped and fixed to the top of the boss 33, sealing the top of the pressure relief groove 331. At this time, the cooking cavity 21 can only communicate with the outside through the pressure relief hole 34, the pressure relief groove 331, and the side vent 332 in sequence.
[0058] Before placing the microwave oven, the user can choose whether to install the pressure booster 5. Without the pressure booster 5, the effect is essentially the same as in Example 2. However, if the pressure booster 5 is snapped onto the top of the boss 33, the side vent 332 on the boss 33 is activated. Generally, the diameter of the side vent 332 is much smaller than the pressure relief hole 34. This narrowing of the exhaust channel results in a higher air pressure inside the cooking cavity 21 compared to Example 2. The increased pressure also raises the actual temperature of the steam (i.e., the steam inside the cooking cavity 21 will exceed 100°C), accelerating the cooking process. Furthermore, when the user grasps the boss 33, the side vent 332 effectively expels the high-temperature steam from the side, reducing the risk of burns to the user's hands. The side vent 332 can also extend to the top of the boss 33, providing space for the removal of the pressure booster 5.
[0059] The above description is merely an example and illustration of the structure of this invention, and while the description is specific and detailed, it should not be construed as limiting the scope of this invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this invention, and these obvious substitutions all fall within the protection scope of this invention.
Claims
1. A microwave oven cooker with a self-heating cover, characterized in that, include: The first pot body (1) is provided with a receiving cavity (11); The second pot body (2) is disposed in the receiving cavity (11). The second pot body (2) is provided with a cooking cavity (21) and a pot opening (22). The cooking cavity (21) is connected to the outside through the pot opening (22). A top cover (3) fits over the pot opening (22), the top cover (3) comprising a first plate (31) and a surrounding edge (32), the surrounding edge (32) extending from the edge of the first plate (31) toward the second pot body (2); and A heating cover (4) is disposed in the cooking cavity (21). The heating cover (4) is provided with a second plate (41). The second plate (41) includes a heating layer (411) and a metal layer (412) stacked together. The metal layer (412) faces the bottom of the second pot body (2). The surrounding edge (32) abuts against and seals the upper edge of the second pot body (2); microwaves pass through the first pot body (1) and the second pot body (2) in sequence and enter the cooking cavity (21); the metal layer (412) blocks some microwaves from being transmitted toward the bottom of the cooking cavity (21); and the heating layer (411) is heated by microwaves.
2. The microwave oven cooker with a self-heating cover according to claim 1, characterized in that, The heating cover (4) is provided with a side plate (42), which is arranged around the edge of the second plate (41), and the metal layer (412) is surrounded by the side plate (42); the metal layer (412) does not abut against the second pot body (2).
3. The microwave oven cooker with a self-heating cover according to claim 2, characterized in that, The second plate (41) further includes a baking layer (413), which is disposed on the side of the metal layer (412) facing the bottom of the second pot body (2) and is attached to the metal layer (412). The baking layer (413) is surrounded by the side plate (42).
4. The microwave oven cooker with a self-heating cover according to claim 3, characterized in that, The baking layer (413) is provided with a heating boss (4131), which is located at the bottom of the baking layer (413) and protrudes towards the bottom of the second pot body (2).
5. The microwave oven cooker with a self-heating cover according to claim 2, characterized in that, The heating cover (4) is also provided with a support block (43) and a lifting plate (44). The support block (43) is formed by extending the side plate (42) toward the bottom of the second pot body (2) and abutting against the inner wall of the second pot body (2). The lifting plate (44) is formed by extending the top of the second plate body (41) toward the top cover (3).
6. The microwave oven cooker with a self-heating cover according to claim 1, characterized in that, The second pot body (2) is provided with a through hole (23), which is located at the bottom of the second pot body (2). A storage space (12) is formed between the bottom of the first pot body (1) and the bottom of the second pot body (2). The storage space (12) and the cooking cavity (21) are connected through the through hole (23).
7. The microwave oven cooker with a self-heating cover according to claim 6, characterized in that, The second pot body (2) also includes a support foot (24), which is disposed in the storage space (12) and abuts against the bottom of the first pot body (1).
8. The microwave oven cooker with a self-heating cover according to claim 1, characterized in that, The top of the first pot body (1) is provided with an annular groove (14) facing the receiving cavity (11), and the outer wall of the second pot body (2) is provided with a protruding ring (26), which is engaged in the annular groove (14).
9. The microwave oven cooker with a self-heating cover according to claim 8, characterized in that, The first pot body (1) and the second pot body (2) are respectively provided with a first handle (13) and a second handle (25). The first handle (13) is located on the outer edge of the first pot body (1). The second handle (25) is formed by extending outward at an angle from the outer side of the second pot body (2). The second handle (25) is aligned with the first handle (13) and does not abut against the first handle (13).
10. The microwave oven cooker with a self-heating cover according to any one of claims 1-9, characterized in that, The top cover (3) is provided with a boss (33) and a pressure relief hole (34). The boss (33) is located on the top of the first plate (31), and the pressure relief hole (34) is provided through the boss (33). The cooking cavity (21) is connected to the outside through the pressure relief hole (34).