Cover plate structure and electric cooker
By introducing an electromagnetic heating device and an air circulation system into the inner lid structure of the rice cooker, the problem of condensation caused by the cold end of the inner lid is solved, achieving uniform temperature of the inner lid and cleanliness of the cooking environment, thus ensuring the safety of the rice cooker.
Patent Information
- Application Number
- CN202422430221.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-08
- Publication Date
- 2025-11-07
- Estimated Expiration
- 2034-10-08
AI Technical Summary
During the heating process, some areas of the inner lid of existing rice cookers are below 100°C, forming a cold end. This causes condensation to drip down, affecting the taste of the food and the safety of the rice cooker. The uneven heating of traditional insulation plates cannot completely solve the condensation problem.
An electromagnetic heating device is used to heat the insulation board, and the inner cover is heated evenly through thermal radiation and air circulation convection, maintaining the inner cover temperature at around 100℃ to avoid the formation of condensation.
It effectively avoids the formation of condensation, ensuring the cleanliness of the cooking environment and the safe use of the rice cooker, and improving the uniformity and efficiency of heating.
Smart Images
Figure CN223516163U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to cooking equipment technical field especially, relates to a cover plate structure and electric rice cooker. BACKGROUND
[0002] Electric rice cooker is a kind of commonly used kitchen appliance, it converts electric energy into heat energy to steam, cook, stew, boil, bake and so on operation to food material, convenient to use, safe and reliable.Electric rice cooker generally includes cover plate structure, boiler body and inner pot, inner pot is arranged in the boiler body, cover plate structure is installed on the boiler body, and cover plate structure is covered with the boiler body to form cooking cavity between the two.
[0003] When electric rice cooker is steamed and cooked, the heating device at the bottom of the boiler body heats the food material in the cooking cavity, and transfers heat to the cover plate structure.The inner cover of the cover plate structure corresponds the cooking cavity, and in the heating state, the overall temperature of the inner cover can reach 100 DEG C, however, due to the setting of the heat dissipation structure of the cover plate structure, the temperature of the inner cover will drop, resulting in that the temperature of the local position of the inner cover is lower than 100 DEG C and forms a cold end.In this case, the steam in the cooking cavity flows upward and meets the cold end of the inner cover to form condensed water, and the condensed water drops into the cooking cavity, which can easily affect the taste of food and even cause food deterioration.And when the cover plate structure is opened, the condensed water will flow to any position in the electric rice cooker and the countertop outside the electric rice cooker, not only need to be cleaned, but also exist the risk of damaging the electric rice cooker.
[0004] The traditional electric rice cooker sets a heat preservation plate in the cover plate structure to maintain the temperature of the inner cover, but the heat preservation effect of the heat preservation plate is limited, and the problem of condensed water cannot be effectively solved.Therefore, the prior art heats the heat preservation plate by setting a heating wire, and then heats the inner cover by heat radiation to improve the problem of condensed water on the surface of the inner cover.However, the heating wire can only heat the area in contact with the heat preservation plate, so that the heat preservation plate is not heated uniformly, thereby affecting the uniformity of the inner cover heating, resulting in that the problem of condensed water cannot be completely solved. SUMMARY
[0005] In order to overcome at least one of the defects of the prior art described above, the purpose of the utility model is to provide a cover plate structure and electric rice cooker, which heats the heat preservation plate by using electromagnetic heating device, so as to transfer heat to the inner cover by heat radiation, thereby maintaining the high temperature uniformity of the inner cover, to solve the problem of condensed water.
[0006] The technical scheme adopted by the utility model to solve the problem is:
[0007] A cover plate structure, comprising: an upper cover, the upper cover is provided with an electromagnetic heating device, a heat preservation plate and an inner cover from top to bottom, and the electromagnetic heating device is located above the heat preservation plate and is arranged close to the heat preservation plate.
[0008] Further, the inner cover is a magnetic conductive structure corresponding to the electromagnetic heating device.
[0009] Further, the electromagnetic heating device comprises an electromagnetic coil group, which is uniformly distributed above the heat preservation plate and the inner cover.
[0010] Further, the electromagnetic heating device further comprises a magnetic shield, which is arranged above the electromagnetic coil group.
[0011] Further, the electromagnetic heating device further comprises a magnetic strip group frame, which is supported at the bottom of the electromagnetic coil group.
[0012] Further, the heat preservation plate, the top inner wall of the upper cover and the inner cover are spaced apart to form a heating cavity and a heated cavity, respectively, a centrifugal fan is arranged in the center area of the heat preservation plate in the heating cavity, air circulation channels are arranged in the center area and the peripheral side of the heat preservation plate, and the electromagnetic heating device is arranged in the heating cavity and located at the peripheral side of the centrifugal fan.
[0013] Further, a plurality of air suction ports are uniformly and spacedly arranged in the center area of the heat preservation plate, a plurality of air exhaust ports are uniformly and spacedly arranged in the peripheral side of the heat preservation plate, and the air circulation channels are formed by the plurality of air suction ports and the plurality of air exhaust ports.
[0014] Further, the upper cover comprises an outer cover and a support cover, and the support cover, the heat preservation plate and the inner cover are sequentially and spacedly arranged in the outer cover from top to bottom to form the heating cavity between the support cover and the heat preservation plate.
[0015] The support cover and the top inner wall of the outer cover are spaced apart to form a containing cavity, and a motor is arranged in the containing cavity, the motor is installed on the support cover and connected to the centrifugal fan.
[0016] Further, the inner cover is detachably connected to the upper cover, and the heat preservation plate is provided with a transparent area corresponding to the centrifugal fan.
[0017] The utility model further provides a rice cooker, which comprises a cooker body, an inner pot and a cover plate structure, the inner pot is arranged in the cooker body, the cover plate structure is hinged to the cooker body, and the cover plate structure can be covered on the cooker body to form a cooking cavity between the cover plate structure and the inner pot.
[0018] The cover plate structure and the rice cooker provided by the utility model have the following beneficial effects:
[0019] The utility model discloses a heat -preserving plate is provided with electromagnetic heating device, and the heat -preserving plate is heated evenly by electromagnetic heating device, and then the heat is transferred to the inner cover through heat radiation, thereby can keep the temperature of each part of the inner cover at about 100 DEG C, avoids the cold end of the inner cover partial appearance, and in the use state of the electric rice cooker, the steam in the cooking cavity flows up to the inner cover and does not produce condensed water, thereby guaranteeing the cleanness of the cooking environment and the safe use of the electric rice cooker. BRIEF DESCRIPTION OF DRAWINGS
[0020] Figure 1 It is the explosion map of the cover plate structure of example 1;
[0021] Figure 2 It is the sectional view of the cover plate structure of example 1;
[0022] Figure 3 It is the structure schematic diagram of the open state of the electric rice cooker of example 2.
[0023] Among them, the meaning of the sign is as follows:
[0024] 1, upper cover;11, outer cover;12, support cover;121, through hole;2, inner cover;3, heat -preserving plate;31, perspective area;32, air inlet;33, air outlet;4, electromagnetic heating device;41, electromagnetic heating coil group;42, magnetic shield;43, magnetic strip group frame;5, heating cavity;6, heated cavity;7, centrifugal fan;8, motor;9, containing cavity;100, cooker body;200, inner pot;300, cover plate structure. DETAILED DESCRIPTION
[0025] In order to better understand and implement, the technical scheme in the utility model embodiment will be clearly and completely described below in combination with the drawings in the utility model embodiment.
[0026] In the description of the utility model, it is explained that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and are not intended to indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model.
[0027] 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 the utility model belongs. The terms used in the specification of the utility model are only for the purpose of describing the specific embodiments and are not intended to limit the utility model.
[0028] Example 1
[0029] Referring to Figures 1-2 The present embodiment provides a cover plate structure, comprising: an upper cover 1, an electromagnetic heating device 4, a heat preservation plate 3 and an inner cover 2 are installed in the upper cover 1 from top to bottom, and the electromagnetic heating device 4 is located above the heat preservation plate 3 and is arranged close to the heat preservation plate 3.
[0030] The upper cover 1 is a semi-enclosed structure with an opening downward, the inner cover 2 is installed on the inner side of the bottom of the upper cover 1, and the circumferential side of the inner cover 2 is fixedly connected with the inner wall of the upper cover 1. The heat preservation plate 3 is installed in the upper cover 1 and is located above the inner cover 2, and the circumferential side of the heat preservation plate 3 is fixedly connected with the inner wall of the upper cover 1. The heat preservation plate 3 is used to preserve the temperature of the inner cover 2, so as to prevent the temperature of the inner cover 2 from being locally or integrally reduced to be obviously lower than 100℃ due to the heat dissipation structure.
[0031] The cover plate structure is generally used in kitchen appliances such as electric rice cookers. In the use state of the kitchen appliances such as electric rice cookers, the steam in the cooking cavity flows upward. The inner cover 2 is arranged opposite to the cooking cavity. The upward flowing steam encounters the inner cover 2. Once the temperature of the inner cover 2 is locally or integrally reduced to be obviously lower than 100℃ due to the heat dissipation structure to form a cold end, the steam encounters cold on the surface of the inner cover 2 to form condensed water. On the one hand, the condensed water will drip into the cooking cavity, affecting the taste of food and even causing the food to deteriorate. On the other hand, when the cover plate structure opens the cooking cavity, the condensed water will gather into a water flow and flow to any part of the kitchen appliance such as an electric rice cooker and the countertop. Not only does this increase the difficulty of cleaning, but also once the condensed water enters the interior of the kitchen appliance such as an electric rice cooker, it is easy to cause short circuit and damage the kitchen appliance such as an electric rice cooker.
[0032] Although the heat preservation plate 3 has a heat preservation effect, the effect is very small, and the inner cover 2 still forms a cold end. The problem of condensed water cannot be completely solved.
[0033] Therefore, the cover plate structure of the present embodiment is provided with an electromagnetic heating device 4. The electromagnetic heating device 4 is arranged in the upper cover 1, and the electromagnetic heating device 4 is located above the heat preservation plate 3 and is arranged close to the heat preservation plate 3. The electromagnetic heating device 4 uses the generated magnetic field to radiate the heat preservation plate 3 to heat the heat preservation plate 3, and then the heat preservation plate 3 heats the inner cover 2 through heat radiation, so as to keep the temperature of each part of the inner cover 2 at about 100℃, avoiding the local cold end of the inner cover 2. In this way, in the use state of the kitchen appliance such as an electric rice cooker, when the steam in the cooking cavity flows upward to the inner cover 2, no condensed water is generated, thereby ensuring the cleanliness of the cooking environment and the safe use of the electric rice cooker.
[0034] Moreover, the electromagnetic heating device 4 heats through the magnetic field. The magnetic field can diffuse to the surrounding environment, and it does not need to be in contact to heat, thereby improving the heating efficiency and uniformity.
[0035] The electromagnetic heating device 4 can be directly mounted on the heat preservation plate 3, or can be spaced apart from the heat preservation plate 3, and the heat preservation plate 3 is preferably made of a material with good heat preservation effect.
[0036] The inner cover 2 is a magnetic conductive structure corresponding to the electromagnetic heating device 4. The inner cover 2 can be made of a magnetic conductive metal material as a whole, or the part of the inner cover 2 facing the electromagnetic heating device 4 is made of a magnetic conductive metal material. In this way, the inner cover 2 is heated in two ways: first, the electromagnetic heating device 4 uses the generated magnetic field to radiate the heat preservation plate 3 to heat the heat preservation plate 3, and then the heat preservation plate 3 heats the inner cover 2 through heat radiation; second, the magnetic field generated by the electromagnetic heating device 4 directly radiates the inner cover 2 which is a magnetic conductive structure. In this way, the inner cover 2 is heated by two heating methods at the same time, which can better keep the temperature of the inner cover 2 at 100°C, and ensure that the temperature of each part of the inner cover 2 is uniform.
[0037] Specifically, the electromagnetic heating device 4 includes an electromagnetic heating coil group 41, which is uniformly distributed above the heat preservation plate 3 and the inner cover 2. The electromagnetic heating coil group 41 is formed by winding a coil on a support, and has a disc-shaped structure, so that the magnetic field generated by the electromagnetic heating coil group 41 can be uniformly diffused to the surrounding environment, thereby uniformly heating the heat preservation plate 3 and the inner cover 2.
[0038] The electromagnetic heating device 4 further includes a magnetic shielding cover 42, which is arranged above the electromagnetic heating coil group 41. The magnetic shielding cover 42 can block the magnetic field of the electromagnetic heating coil group 41 from radiating away from the heat preservation plate 3, so that the magnetic field of the electromagnetic heating coil group 41 is concentrated below the magnetic shielding cover 42, thereby improving the heating efficiency.
[0039] Furthermore, the electromagnetic heating device 4 further includes a magnetic strip group frame 43, which is wrapped and supported at the bottom of the electromagnetic heating coil group 41. The magnetic strip group frame 43 is formed by a plurality of magnetic strips diffusing outward along different directions from the same center, and is wrapped below the electromagnetic heating coil group 41, which can cooperate with the electromagnetic heating coil group 41 to generate a high-frequency magnetic field, thereby further improving the heating effect.
[0040] On the basis of the above structure, referring to Figures 1-3 The heat preservation plate 3, the top inner wall of the upper cover 1, and the inner cover 2 are all spaced apart to form a heating cavity 5 and a heated cavity 6, respectively. The center region of the heat preservation plate 3 in the heating cavity 5 is provided with a centrifugal fan 7, and the center region of the heat preservation plate 3 and the circumferential side are provided with air flow channels to realize the circulation of air in the heating cavity 5 and the heated cavity 6 by the driving of the centrifugal fan 7, and the electromagnetic heating device 4 is arranged in the heating cavity 5 and located at the circumferential side of the centrifugal fan 7.
[0041] The heating cavity 5, the heated cavity 6 and the centrifugal fan 7 are arranged so that when the centrifugal fan 7 rotates, the air in the heated cavity 6 can be sucked into the heating cavity 5, then spread to the periphery through the centrifugal structure and then return to the heated cavity 6. In this way, the inner cover 2 is heated in three ways: first, the electromagnetic heating device 4 uses the generated magnetic field to radiate the heat preservation plate 3 to heat the heat preservation plate 3, and then the heat preservation plate 3 heats the inner cover 2 through heat radiation; second, the magnetic field generated when the electromagnetic heating device 4 works directly radiates the inner cover 2 of the magnetic conductive structure. Third, the magnetic field generated when the electromagnetic heating device 4 works heats the air in the heating cavity 5 and part of the heated cavity 6, and then uses the centrifugal fan 7 to realize the circulation of the air in the heating cavity 5 and the heated cavity 6. Heat convection to uniformly heat the air in the heating cavity 5 and the heated cavity 6, and heat exchange between the air in the heated cavity 6 and the inner cover 2 to heat the inner cover 2. In this way, the three heating methods simultaneously heat the inner cover 2, which can better maintain the temperature of the inner cover 2 at 100℃, ensure that the temperature of each part of the inner cover 2 is uniform, and improve the heating efficiency.
[0042] It is worth noting that the electromagnetic heating coil group 41, the magnetic shield 42 and the magnetic strip group frame 43 are all located in the heating cavity 5 and surround the periphery of the centrifugal fan 7. The centrifugal fan 7 is arranged at a distance from the heat preservation plate 3, so as to ensure the smooth rotation of the centrifugal fan 7 and avoid damage to the electromagnetic heating coil group 41, the magnetic shield 42, the magnetic strip group frame 43 and the heat preservation plate 3 by the fan blades of the centrifugal fan 7.
[0043] For the air flow channel, the central area of the heat preservation plate 3 is uniformly and evenly spaced with a plurality of air suction ports 32, and the periphery of the heat preservation plate 3 is uniformly and evenly spaced with a plurality of air exhaust ports 33. The plurality of air suction ports 32 and the plurality of air exhaust ports 33 form an air flow channel. The air suction port 32 is used to uniformly and quickly suck the air in the heated cavity 6 into the heating cavity 5 when the centrifugal fan 7 rotates, and the air exhaust port 33 is used to uniformly and quickly return the air diffused to the periphery through the centrifugal structure into the heated cavity 6, so as to realize strong convection of the air in the heating cavity 5 and the heated cavity 6 through the air suction port 32 and the air exhaust port 33.
[0044] The rotation of the centrifugal fan 7 is driven by the motor 8. The upper cover 1 includes an outer cover 11 and a support cover 12. The support cover 12, the heat preservation plate 3 and the inner cover 2 are sequentially and spaced arranged in the outer cover 11 from top to bottom to form the heating cavity 5 between the support cover 12 and the heat preservation plate 3. The support cover 12 and the inner wall of the top of the outer cover 11 are spaced to form the accommodating cavity 9. The motor 8 is arranged in the accommodating cavity 9 and is mounted on the support cover 12 and connected with the centrifugal fan 7.
[0045] The support cover 12 is used to support and mount the motor 8, and a through hole 121 is formed through the support cover 12 for the output shaft of the motor 8 to rotate through, so that the output shaft of the motor 8 is connected to the centrifugal fan 7. In this way, the fan structure composed of the motor 8 and the centrifugal fan 7 can be stably mounted through the support cover 12.
[0046] In the embodiment, the support cover 12, the heat preservation plate 3 and the inner cover 2 are detachably connected to the outer cover 11 through buckles or other structures, so that the components can be individually replaced and cleaned. The heat preservation plate 3 is provided with a transparent area 31 corresponding to the centrifugal fan 7. The transparent area 31 can be provided on the heat preservation plate 3 or be a part of the heat preservation plate 3, so that the rotation of the centrifugal fan 7 can be observed through the transparent area 31 after the inner cover 2 is removed, and the centrifugal fan 7 is visualized, so that problems of the centrifugal fan 7 can be found and solved in time, thereby ensuring the smooth circulation of the hot convection between the heating cavity 5 and the heated cavity 6.
[0047] Embodiment 2
[0048] Referring to Figure 3 The embodiment provides an electric rice cooker, which comprises a cooker body 100, an inner pot 200 and a cover plate structure 300 according to any one of embodiments 1-3. The inner pot 200 is arranged in the cooker body 100, and the cover plate structure 300 is hingedly connected to the cooker body 100. The cover plate structure 300 can be closed on the cooker body 100 to form a cooking cavity between the cover plate structure 300 and the inner pot 200.
[0049] The outer cover 11 of the cover plate structure 300 is rotatably connected to the cooker body 100 through a hinge structure, so that the cover plate structure 300 can be closed on the cooker body 100 or the cooking cavity can be opened.
[0050] The cover plate structure 300 of embodiment 1 is assembled in the electric rice cooker. In the use state of the electric rice cooker, the inner cover 2 can be heated in three ways: first, the electromagnetic heating device 4 radiates the heat preservation plate 3 by using the generated magnetic field to heat the heat preservation plate 3, and then the heat preservation plate 3 heats the inner cover 2 by heat radiation; second, the magnetic field generated by the electromagnetic heating device 4 directly radiates the inner cover 2 of the magnetically conductive structure when the electromagnetic heating device 4 is working; third, the magnetic field generated by the electromagnetic heating device 4 heats the air in the heating cavity 5 and part of the heated cavity 6, and then the air in the heating cavity 5 and the heated cavity 6 is circulated by the centrifugal fan 7 to realize the hot convection, so that the air in the heating cavity 5 and the heated cavity 6 is uniformly heated, and the inner cover 2 is heated by heat exchange with the air in the heated cavity 6. The three heating methods simultaneously heat the inner cover 2, which can better maintain the temperature of the inner cover 2 at 100℃, ensure the uniform temperature of each part of the inner cover 2, and improve the heating efficiency. In this way, the cold end of the inner cover 2 can be avoided, and the steam in the cooking cavity will not condense when flowing upward to the inner cover 2, thereby ensuring the cleanliness of the cooking environment and the safe use of the electric rice cooker.
[0051] The technical means disclosed by the utility model scheme are not limited to the technical means disclosed by the above-mentioned embodiments, and also include technical schemes composed of any combination of the above technical features. It should be noted that, for ordinary skilled persons in the art, without departing from the principles of the utility model, a number of improvements and refinements can be made, and these improvements and refinements are also considered within the protection scope of the utility model.
Claims
1. A cover structure, characterized by, The upper cover (1) is internally provided with an electromagnetic heating device (4), a heat preservation plate (3) and an inner cover (2) from top to bottom, and the electromagnetic heating device (4) is arranged above and close to the heat preservation plate (3). The inner cover (2) is a magnetic conductive structure corresponding to the electromagnetic heating device (4).
2. The cover plate structure according to claim 1, characterized by: The electromagnetic heating device (4) comprises an electromagnetic heating coil group (41) which is uniformly distributed above the heat preservation plate (3) and the inner cover (2).
3. The cover plate structure according to claim 1, characterized by: The electromagnetic heating device (4) further comprises a magnetic shield (42) which is arranged above the electromagnetic heating coil group (41).
4. The cover plate structure according to claim 3, characterized by: The electromagnetic heating device (4) further comprises a magnetic strip group frame (43) which is supported at the bottom of the electromagnetic heating coil group (41).
5. The cover plate structure according to claim 3, characterized by: The heat preservation plate (3) and the top inner wall of the upper cover (1) and the inner cover (2) are spaced apart to form a heating cavity (5) and a heated cavity (6), respectively, and the center area of the heat preservation plate (3) and the circumferential side are provided with air flow channels, so that the circulation of air in the heating cavity (5) and the heated cavity (6) is realized by the driving of the centrifugal fan (7), and the electromagnetic heating device (4) is arranged in the heating cavity (5) and located at the circumferential side of the centrifugal fan (7).
6. The cover structure according to any one of claims 1 to 5, characterized in that: The center area of the heat preservation plate (3) is uniformly and spacedly provided with a plurality of air suction ports (32), and the circumferential side of the heat preservation plate (3) is uniformly and spacedly provided with a plurality of air exhaust ports (33), and the plurality of air suction ports (32) and the plurality of air exhaust ports (33) form the air flow channel.
7. The cover plate structure according to claim 6, characterized by: The upper cover (1) comprises an outer cover (11) and a support cover (12), and the support cover (12), the heat preservation plate (3) and the inner cover (2) are sequentially and spacedly arranged in the outer cover (11) from top to bottom, so as to form the heating cavity (5) between the support cover (12) and the heat preservation plate (3).
8. The cover plate structure according to claim 6, characterized by: The support cover (12) and the top inner wall of the outer cover (11) are spaced apart to form a containing cavity (9), and the containing cavity (9) is provided with a motor (8), and the motor (8) is mounted on the support cover (12) and connected with the centrifugal fan (7). The inner cover (2) and the upper cover (1) are detachably connected, and the heat preservation plate (3) is provided with a transparent area (31) corresponding to the centrifugal fan (7).
9. The cover plate structure of claim 6, wherein: The pot body (100), the inner pot (200) and the cover plate structure (300) according to any one of claims 1-9 are arranged in the pot body (100), the cover plate structure (300) is hingedly connected with the pot body (100), and the cover plate structure (300) can be covered on the pot body (100) to form a cooking cavity between the cover plate structure (300) and the inner pot (200).
10. An electric rice cooker, characterized by comprising: