Multifunctional electric heating cover, modular electric heating cover and cooking utensil

Abstract

This utility model discloses a multifunctional electric heating cover, a modular electric heating cover, and a cooking appliance having the modular electric heating cover. It includes: a cover plate, a handle, a heating element, a motor, a main fan blade, an insulating cover, a control unit, a cooling fan blade, and a power connector. The handle includes a grip and a handle base, with the handle base connected to one end of the grip and to the cover plate. The control unit and the power connector are disposed in the grip. The motor is mounted inside the handle base, and the cooling fan blade is mounted on the motor shaft and located in the handle base. The handle base has heat dissipation holes and an air intake along the circumference of the cooling fan blade. The heat insulation cover is disposed on the handle base or the cover plate, and the main fan blade and the heating element are disposed on the side of the insulating cover facing away from the handle. The main fan blade is connected to the motor, the heating element and the motor are connected to the control unit, and the control unit is connected to the power connector. The multifunctional electric heating cover of this utility model has the advantages of multiple uses, aesthetic appeal, lightweight design, and ease of handling and portability.

Description

Technical Field

[0001] This utility model relates to the field of cooking utensil manufacturing technology, specifically to a multifunctional electric heating cap, a modular electric heating cap, and a cooking utensil having the modular electric heating cap. Background Technology

[0002] Related technologies such as air fryers and ovens are limited in function and cannot be used with other cookware or containers, nor can they utilize the heat sources of other stoves. For example, they cannot be used with a wok for simultaneous frying on both sides, nor can they utilize the heat sources of other stoves to roast foods like sweet potatoes without flipping them. They are also inconvenient for portable uses such as keeping food warm, grilling skewers, or using fire for heating. In addition, the heating element and fan blades are difficult to clean, which is a common complaint among users and a persistent problem in the industry. While the split design of the air fryer head cover may seem to allow for use with other cookware or containers, it lacks a convenient handle, is bulky, and has a problematic hot air guiding design. While it appears portable and compatible with various cookware or containers, this is actually not feasible. For example, when used with a frying pan to achieve simultaneous frying on both sides, its airflow design, similar to an air fryer, aims to direct hot air to the bottom of the food using the side walls of the container, thus heating the food on both sides simultaneously. However, this design has requirements regarding the shape and size of the container. When used with a frying pan, the hot air primarily heats the upper part of the pan without food, failing to effectively fry the food. The hot air also dry-roasts the upper part of the pan without food, causing the oil absorbed by the pan to be heated into smoke. In actual use, there is a lot of smoke, making the frying of food very inefficient. Furthermore, its design is bulky and lacks a handle, making it inconvenient to hold and difficult to clean and wash. Utility Model Content

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a multifunctional electric heating cover, which has the advantages of multiple uses, being aesthetically pleasing and lightweight, and being easy to hold and move.

[0004] This utility model also proposes a modular electric heating cover. In addition to being multi-purpose, aesthetically pleasing, and lightweight, the modular electric heating cover has the advantages of multiple uses and easy cleaning. After combining some features of the multi-functional electric heating cover, it also has the advantages of being aesthetically pleasing, lightweight, easy to hold, and portable.

[0005] This utility model also proposes a cooking appliance with the aforementioned modular electric heating cover, which has the advantage of being easy to clean.

[0006] To achieve the above objectives, a multifunctional electric heating cover is provided according to an embodiment of the first aspect of this utility model. The multifunctional electric heating cover includes: a cover plate for matching other containers or for heat concentration; a handle for gripping and assembling related components; a heater, a motor, a main fan blade, an isolation cover, a control unit, a cooling fan blade, and a power connector; the handle includes a grip for holding and a handle base for cooperating with the cover plate, the handle base being connected to one end of the grip and to the cover plate; the control unit is disposed in the handle, and the power connector is disposed at the tail end of the handle; the motor is disposed in the handle base, the cooling fan blade is connected to the motor, and the handle base has heat dissipation holes arranged circumferentially along the cooling fan blade; the handle also has an air intake, the position of which allows the airflow driven by the cooling fan blade to flow through the area in the handle that needs to be cooled; the isolation cover is disposed in the handle base or on the cover plate, the main fan blade and the heater are disposed on the side of the isolation cover facing away from the handle; the main fan blade is connected to the motor, the heater and the motor are connected to the control unit, and the control unit is connected to the power connector.

[0007] The multifunctional electric heating cover according to the embodiments of this utility model has the advantages of multiple uses, beautiful appearance and light weight, and easy handling and movement.

[0008] In addition, the multifunctional electric heating cover according to the above embodiments of this utility model may also have the following additional technical features: Optionally, a conductive sheet is also included. The conductive sheet is disposed on the inner wall of the handle for gripping. The conductive sheet is connected to the control unit by a wire or spring. The control unit uses capacitance changes to sense whether a hand is gripping the handle, and controls the working state of the heater accordingly. This provides fire and burn protection. If a hand grips the handle, it means that the multi-functional heating cover may be moved, and the control unit can control the heater to pause heating.

[0009] Optionally, it also includes a cover or mesh, wherein the isolation cover or mesh uses its sidewalls to guide the radial airflow driven by the main fan blades into an axial flow, and by designing the angle and height of the sidewalls of the isolation cover or mesh, the diffusion angle of the axial airflow is adjusted, so that the airflow driven by the main fan blades effectively acts on the food. Multifunctional electric heating covers have multiple uses, such as for frying, braising, and grilling with other stoves and cookware, or for reheating dishes and grilling alone. Unlike air fryers, they cannot rely on the sidewalls of the cookware to guide the hot airflow. Therefore, multifunctional electric heating covers need to incorporate this airflow guiding design so that, in most usage scenarios, the hot air can effectively act on the food, without excessive diffusion or focusing.

[0010] Optionally, it also includes a heat insulation layer disposed on the outside of the isolation cover to reduce the diffusion of heat generated by the heater to the outside of the isolation cover. This feature has the advantages of increasing the energy efficiency of the multifunctional electric heating cover and reducing the heat load on the motor.

[0011] Optionally, it also includes a socket, a plug-in plate, a mounting base, and a mounting base cover. The socket is disposed in the handle and is connected to the control unit. The two terminals of the heater are connected to the plug-in plate. The heater and the plug-in plate are assembled in the mounting base and the mounting base cover to form a heater assembly. The plug-in plate is plugged into and detached from the socket. This feature allows for a waterproof and easy-to-disassemble design of the heater assembly and eliminates the structure used for fixing and supporting the heater, making cleaning easier.

[0012] According to a second aspect of this utility model, a modular electric heating cover is provided, comprising: a cover plate module and an electrical module; the cover plate module comprises: a cover plate, an isolation cover, a heater, a main fan blade, and an electrical connection terminal one; the isolation cover is assembled with the cover plate, the heater and the main fan blade are disposed on the inner side of the isolation cover, and the heater is connected to the electrical connection terminal one; the electrical module comprises: a housing, a motor, a control unit, a cooling fan blade, a power connector, and an electrical connection terminal two; the motor and the electrical connection terminal two are connected to the control unit, the control unit is connected to the power connector, and the cooling fan blade is assembled on the shaft of the motor; the motor, control unit, cooling fan blade, power connector, and electrical connection terminal two are assembled in the housing to form the electrical module; the cover plate module and the electrical module are connected in a detachable manner; the cover plate module and the electrical module are electrically connected through the electrical connection terminal one and the electrical connection terminal two, and the motor and the main fan blade are connected by a transmission method of meshing, friction, or magnetism.

[0013] The modular electric heating cover according to the present utility model has one or more advantages such as being easy to clean or having multiple uses, being aesthetically pleasing and lightweight, and being easy to hold and move.

[0014] In addition, the modular electric heating cover according to the embodiments of this utility model may also have the following additional technical features: Optionally, the outer casing is a handle, which includes a grip for holding and a handle base for engaging with the cover module. The handle base is connected to one end of the grip. The control unit is disposed in the grip, and the power connector is disposed at the tail end of the grip. The motor is disposed within the handle base, and the cooling fan is connected to the motor. The handle base has heat dissipation holes arranged circumferentially along the cooling fan. The cover module also includes an outer cover, which is disposed outside the isolation cover. A snap fastener is provided between the handle base and the outer cover, and the cover module is connected to the electrical module via the snap fastener. This feature allows the modular electric heating cover to have the advantages of being aesthetically pleasing, lightweight, and easy to hold.

[0015] Optionally, the first electrical connection terminal includes a plug-in piece, a mounting base, and a mounting base cover; the second electrical connection terminal is a plug-in socket. The plug-in socket is disposed within the housing of the electrical module and is connected to the control unit. The two terminals of the heater are connected to the plug-in piece. The heater and the plug-in piece are assembled in the mounting base and the mounting base cover to form a heater assembly. The plug-in piece and the plug-in socket are plugged in and out. This feature allows for a waterproof and easily detachable design for the heater assembly and eliminates the structure used to fix and support the heater, making cleaning easier.

[0016] Optionally, it also includes bearings and flexible transmission components. The main fan blade is fixed to the cover plate module via bearings, and the main fan blade is connected to the motor via the flexible transmission components. This can eliminate vibration problems caused by misalignment or gaps between the motor and fan blades due to the lack of precision in the fit between the two modules.

[0017] According to an embodiment of the third aspect of this utility model, a cooking appliance is provided, the cooking appliance including the modular electric heating cover.

[0018] The cooking appliance according to the embodiments of the present invention, by utilizing the modular electric heating cover described in the second aspect of the present invention, has the characteristic of being easy to clean.

[0019] The embodiments and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0020] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a schematic diagram of the appearance of a multifunctional electric heating cap. Figure 2 This is a cross-sectional schematic diagram of a multifunctional electric heating cap.

[0021] Figure 3 This is an exploded view of a multi-functional electric heating cap.

[0022] Figure 4 This is an isometric view of a heating element assembly.

[0023] Figure 5 This is an exploded view of a heating element assembly.

[0024] Figure 6 A cross-sectional view of a multifunctional electric heating cap Figure 2 .

[0025] Figure 7 A cross-sectional view of a multifunctional electric heating cap Figure 3 .

[0026] Figure 8 This is a schematic diagram of a modular electric heating cover.

[0027] Figure 9 This is a schematic cross-sectional view of a modular electric heating cover assembly.

[0028] Figure 10 This is a cross-sectional schematic diagram of an electrical module.

[0029] Figure 11 It is an exploded diagram of an electrical module.

[0030] Figure 12 This is a schematic diagram of a main fan blade assembly.

[0031] Figure 13 This is a cross-sectional schematic diagram of a cover plate module.

[0032] Figure 14 This is a schematic diagram of another main fan blade assembly structure.

[0033] Figure 15 This is an exploded view of a cover plate module.

[0034] Figure 16 This is an isometric view of another type of heater assembly.

[0035] Figure 17 This is a three-dimensional sectional view of another cover plate module.

[0036] Figure 18 This is an exploded view of another type of cover plate module.

[0037] Figure 19 This is a cross-sectional diagram of a cooking utensil.

[0038] Figure 20 This is a diagram illustrating the disassembly of a cooking utensil cover module.

[0039] Reference numerals: 1. Cover plate; 2. Lower handle cover; 201. Buckle 1; 3. Upper handle cover; 301. Surface sticker; 4. Motor; 401. Motor shaft; 402. Bushing; 5. Control unit; 501. Temperature sensor; 502. SCR; 503. Spring; 504. Temperature fuse; 505. Conductive sheet; 505. Temperature controller; 506. Timer; 507. Heat sink; 508. 6. Heating element 601, plug 602, mounting base 603, mounting base cover 603, small circuit board 604, support buckle 605, sealing tube 606, main fan blade 7, main fan blade shaft 701, bearing 702, hose 703, friction connector 704, isolation cover 8, cover plate outer cover 9, buckle two 901, sealing ring 902, sealing sheet 903, pressure cover 904, cooling fan blade 10, power connector 11, heat insulation layer 12, push button 13, tail buckle 14, cover net 15, plug socket 16, base 17, lower cover of the machine head 18, middle cover of the machine head 19, pot 20, storage net 21, knob 22, contact one 23, contact two 24, spring 25, screw 26, nut 27, upper cover of the machine head 28. Detailed Implementation

[0040] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same symbols denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0041] In this utility model, it should be understood that the terms "inner side" and "outer side" in the claims and description are conventional positional relationships. For example, the inner side of a lid refers to the side facing the pot or container, and the outer side is the opposite. Terms such as "center," "axial," "radial," "circumferential," "upper," "lower," "front," and "rear," indicating positional relationships, are based on the positions shown in the drawings or conventional positions, and are only for the convenience of describing this utility model and simplifying the description. They 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 limiting this utility model. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0042] In this utility model, it should be noted that, unless otherwise explicitly specified or limited, the terms "installation," "assembly," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. For the sake of simplicity, the term "lid" is sometimes used in this document to replace "multifunctional electric heating cover" or "modular electric heating cover," and the specific meaning of "lid" is determined by the context of the embodiments.

[0043] Without conflict, the embodiments and features described in this application can be combined with each other, and any solution that can be easily conceived through this utility model is within the protection scope of this utility model. The utility model will be further described below with reference to the accompanying drawings and embodiments.

[0044] Example 1 like Figure 1 and Figure 2 As shown, the multifunctional electric heating cover according to an embodiment of the present invention includes: a cover plate 1 for matching other containers or for heat concentration; a handle for gripping and assembling related components; a heater 6, a motor 4, a main fan blade 7, an isolation cover 8, a control unit 5, a cooling fan blade 10, and a power connector 11; the handle includes a grip for holding and a handle base for cooperating with the cover plate 1, the handle base being connected to one end of the grip and connected to the cover plate 1; the control unit 5 is disposed in the handle, and the power connector 11 is disposed at the tail end of the handle; the motor 4 is disposed in the cover plate 1. Inside the base of the handle, the cooling fan 10 is connected to the motor 4, and the base of the handle is provided with heat dissipation holes along the circumference of the cooling fan; the handle is also provided with an air intake, the position of which allows the airflow driven by the cooling fan to flow through the part of the handle that needs to be cooled; the isolation cover 8 is provided on the base of the handle or the cover plate 1, and the main fan 7 and the heater 6 are provided on the side of the isolation cover 8 facing away from the handle; the main fan 7 is connected to the motor 4, the heater 6 and the motor 4 are connected to the control unit 5, and the control unit 5 is connected to the power connector 11.

[0045] Figure 1 This is a schematic diagram of the appearance of a multi-functional electric heating lid. As can be seen, its appearance and size are similar to a regular glass pot lid, making it easy to hold and operate. The faceplate 301 is the area for status display and function buttons. Divided by faceplate 301, the right side is the handle for gripping, while the left side is the handle base. In this embodiment, the handle and the handle base are different parts of the same component, but this invention is not limited to this; the handle base can be composed of different parts.

[0046] Figure 2 A cross-sectional view shows the internal structure of a multifunctional electric heating cover. As shown in the figure, the handle consists of an upper handle cover 3 and a lower handle cover 2. There is no clear structural boundary between the handle and the handle base, but their functional boundaries are very clear: the handle is for gripping, and the handle base is for mounting the motor and cooperating with the cover plate. The handle's structure is designed for easy gripping, easy movement, lightweight design, and small size. Therefore, the control unit 5 is confined to the handle to make the most efficient use of space. Of course, its length extending into the handle base is also possible. The power connector is confined to the end of the handle, which does not affect gripping and facilitates movement. The control unit 5 in the figure uses an electronic circuit board. Compared to mechanical control components, its component layout on the PCB board can be flexibly adjusted according to the space inside the handle, and it is more compact, effectively utilizing the slender space of the handle, and the control is more precise and intelligent. A temperature sensor 501 collects temperature data, and a silicon controlled rectifier 502 controls the power of the heater 6, thereby achieving temperature control. The SCR 502 is mounted on a heatsink 508, which is located at the air intake of the handle, achieving good heat dissipation. (See reference...) Figure 6 , Figure 6 The small arrow on the handle indicates the airflow path for cooling when the motor is running, allowing direct cooling of the SCR and motor. Other components on control unit 5 generate little heat and can be indirectly cooled by air diffusion; in fact, the handle itself provides sufficient heat dissipation. The SCR 502 can also be replaced by a relay, using continuous switching to control average power and thus temperature. However, relay temperature control is not smooth, and frequent switching can easily cause contact failure due to sparking. If the mechanical control component is small enough and does not affect the ease of handling and lightweight design requirements of this multi-functional cover, control unit 5 can also be mechanically controlled. Figure 2 The power connector can be a three-prong socket, compatible with the three-prong plug of a standard power cord. Power connector 11 can also be a power cord, but since the multi-functional electric heating lid can be used as a regular pot lid, carrying a power cord is redundant; therefore, a pluggable power cord is more convenient. The handle base (also called the handle head) is mainly for mounting the motor 4 and assembling it with the lid plate 1. The diagram shows a shaded-pole motor, but a brushless motor could also be used for a more compact design, making the multi-functional electric heating lid smaller and lighter. Brushless motors have specific power supply or control requirements, which may increase the size of the control unit 5. In subsequent product implementation, the choice can be made based on the actual situation. Figure 2 As shown, the isolation cover 8 can be assembled with the cover plate 1, or with the handle base (in... Figure 2In the illustrated design, the handle base (part of the handle lower cover 2) is assembled together. The purpose of the heat insulation cover is to isolate the heat source from the handle and motor, preventing damage to the handle, motor, and other heat-sensitive parts, and also preventing excessive heat waste from the heater 6. Therefore, the heater 6 must be installed on the side of the heat insulation cover facing away from the handle. The main fan blade 7, which drives the air circulation heating, also naturally needs to be installed on the side of the heat insulation cover facing away from the handle. The heat insulation cover can also be used to fix the heater and other related components; it must be made of high-temperature resistant materials, typically metal.

[0047] The following describes some uses of the multi-functional electric heating lid in this embodiment: 1. For baking and simmering with other cookware, such as baking food. The food is placed in a regular pot, and the multi-functional electric heating lid heats it from above while the other cookware heats it from below. Actual testing shows that it achieves good baking results without flipping the food. The capacity depends on the pot, allowing for a wide range of capacity expansion. In this case, it is equivalent to an oven or air fryer with adjustable capacity and dual heat sources. It can also be used with other cookware for frying, such as frying soft tofu, fish, etc., allowing for simultaneous frying on both sides without flipping, preventing sticking and breakage. Actual testing shows excellent results. 2. For standalone use, it can be placed on a suitable container to function as a single-sided heating air fryer; placed on cooked dishes and set to a suitable temperature to keep them warm, preventing the food from cooling down while cooking later dishes; placed on a baking tray for grilling skewers; or placed on a stand to function as a small heater. As can be seen from the above introduction, through the structural design of the multi-functional electric heating cover and the reasonable selection and layout of components, compared with products such as air fryers, ovens, and air fryer head covers, the multi-functional electric heating cover of this embodiment has the advantages of multiple uses, beautiful appearance and light weight, and easy handling and movement.

[0048] Optionally, such as Figure 3 and Figure 6As shown, a conductive sheet 505 can also be added. This conductive sheet is located on the inner wall of the handle for gripping. It is connected to the control unit 5 by a wire or spring 501. The control unit uses capacitance changes to sense whether a hand is gripping the handle, and thus controls the operating state of the heater. In the diagram, the conductive sheet 505 is located on the inner wall of the handle of the lower cover 2. A spring 501 is located on the control unit 5 and contacts it. When a hand grips the handle, the control unit 5 can control the heater 6 to pause heating. The pause can only be lifted by manually pressing a relevant button. Alternatively, the motor 4 can be turned off simultaneously, or the motor 4 can be allowed to run for a certain period before being turned off to allow for heat dissipation. This function aims to prevent the multi-functional electric heating cover from damaging other items and igniting flammable materials, potentially causing a fire. For example, if a user places the working cover on a table while viewing or handling food, it may damage the tablecloth or crack the glass. Although users can manually close the cover using the power button, they may sometimes forget. Therefore, this function provides better protection. This feature is not essential; the same protection can be achieved in other ways, such as a mechanical switch. When the lid is lifted, the weight of the lid or the grip of a person's hand can trigger the mechanical switch, thus achieving the same protection.

[0049] Optionally, a cover 15 can be added. The isolation cover 8 or the cover can use its sidewalls to guide the radial airflow driven by the main fan blade 7 into an axial flow. By designing the angle and height of the sidewalls of the isolation cover or cover, the diffusion angle of the axial airflow can be adjusted, so that the airflow driven by the main fan blade can effectively act on the food. Figure 6As shown, the arrow below the cover 1 illustrates the airflow circulation driven by the main fan blade 7. The main fan blade is a centrifugal fan blade; its high-speed rotation uses centrifugal force to throw air in all directions. After leaving the main fan blade, the airflow undergoes a combined radial and rotational motion. A low-pressure zone is formed at the center of the main fan blade, generating suction that draws air up from below. Traditional air fryers or air fryer covers aim to allow airflow to flow radially, using the side wall of the pot or container to guide the airflow to the bottom, thus heating the bottom of the food. The hot air passes through the basket where the food is placed and is then drawn into the central low-pressure zone by the main fan blade, continuously circulating the hot air. Therefore, the cover 15 or the isolation cover 8 has numerous holes around its circumference, the purpose of which, as mentioned above, is to allow the hot air to heat the bottom of the food. Of course, some designs do not have holes on the sides; instead, the side wall of the isolation piece 8, as shown in the figure, is designed to be shallow, utilizing the centrifugal force generated by the rotation of the airflow itself to diffuse in all directions, achieving the same effect as side openings. The existing design approach used in the multi-functional electric heating cover of this invention has adverse effects in most application scenarios. For example, when used with a wok for frying, the airflow structure of an air fryer results in a lot of oil fumes and low heating efficiency. This is because the shape of the wok prevents its side walls from guiding the air acting on it to the bottom. Through geometric or theoretical mechanics, it's known that the air is directed upwards rather than to the bottom. This means the hot air thrown outwards only heats the upper part of the cookware without food, generating a lot of oil fumes and wasting energy, while the food surface only receives heat radiation, resulting in low efficiency and poor frying / grilling effects. When used as an air fryer or oven, other stovetops can be used as auxiliary heat sources at the bottom, so there's no need for the airflow to reach the bottom of the food. Therefore, the design approach of this feature is a better choice for the isolation cover 8 or mesh cover 15 of the multi-functional electric heating cover. The size of the cover plate 1 is used to estimate the matching pot, and the angle and height of the side walls of the isolation cover or mesh cover are adjusted to ensure that the hot air acts on the appropriate area of ​​the bottom of the cookware. The cover 15 also protects the heater 6 and the main fan blade 7. When a mosquito coil-shaped heating element is used as the heater, the fan blade should be positioned between the heater and the isolation cover 8. Since the heater itself provides protection, the cover is not necessary. Therefore, the cover is not a required feature. This feature is more of a design method, and those skilled in the art can achieve the same effect using various structures based on the method described in this feature. This feature is also an improvement of this utility model, not a necessary feature.

[0050] Optionally, such as Figure 6 and Figure 3As shown, a heat insulation layer 12 can be added. This layer is positioned on the outside of the isolation cover 8 to reduce the diffusion of heat generated by the heater 6 to the outside of the isolation cover. Actual testing shows that existing air fryers or air fryer heads dissipate a significant amount of heat through the isolation cover 8 into the space where the cooling fan 10 is located, resulting in substantial heat waste and slower heating of the food-heating space. Adding the heat insulation layer 12 solves this problem. Furthermore, for frying food using other cooking appliances, speed is required, ideally completing the process in minutes, unlike ovens or air fryers which often require 20 minutes or more for baking. Therefore, the multi-functional electric heating cover needs to heat up quickly and reach higher temperatures to achieve rapid cooking. These requirements necessitate the addition of a heat insulation layer for better performance. (Cross-section) Figure 6 and explosion Figure 3 Schematic diagrams of the insulation layer 12 are provided. Depending on the maximum temperature set by the lid, the insulation layer can be made of high-temperature resistant foamed silicone, or filled with foamed perlite, aerogel, or a sealed hollow interlayer. This feature is an improvement, not a necessary one.

[0051] Optionally, such as Figure 4 , Figure 5 , Figure 7 As shown, it also includes a power socket 16. The heater includes a power strip 601, a mounting base 602, and a mounting base cover 603. The power socket is disposed in the handle, and the power socket 16 is connected to the control unit 5. The two terminals of the heater 6 are connected to the power strip. The heater and the power strip are assembled in the mounting base and the mounting base cover to form a heater assembly. The power strip and the power socket are plugged in and out. If a carbon fiber heating tube or a halogen heating tube is used, the insulation of the two leads of the heater 6 depends on the fiber tube. The fiber tube cannot effectively waterproof, and water may seep in from the joint between the ceramic pillars and the glass tube at both ends, resulting in a lack of insulation. Moreover, its dependence on... Figure 2 and Figure 6 The support clip 605 shown is fixed to the isolation cover 8. Generally, three to four support clips are used to secure the heater. However, these clips themselves easily accumulate grease and hinder cleaning. They also complicate disassembly when deep cleaning of the heater is required. Designing the heater as... Figure 4 , Figure 5The structure shown allows the mounting base 602 and mounting base cover 603 to be made of ceramic, filled with food-grade high-temperature resistant silicone for overall waterproof sealing. If the maximum temperature of the multi-functional heating cover exceeds the long-term allowable temperature of the food-grade waterproof insulating potting material, the mating surfaces of the mounting base and mounting base cover can be mirror-polished, similar to a ceramic valve core in a faucet, to achieve a seal. Since the protruding ends of the mounting base 602 and the plug-in 601 are already outside the high-temperature internal area, they can be sealed with silicone or epoxy resin, thus achieving overall waterproofing of the heating element assembly. The mounting base and mounting base cover can also be designed with a labyrinth-like structure to extend the creepage distance from the external to the internal live parts. By further reducing the mating gap, even if water seeps in, it can be protected by the water's resistance, similar to the anti-electric shock wall of an electric water heater. This structure, in addition to waterproofing and anti-electric shock treatment, also eliminates the support buckle 605, relying solely on the mounting base to fix the heating element 6 in place. Figure 7 As shown, because the heating element lead-out end is sealed, only the motor shaft through-hole needs to be sealed or the gap controlled to a sufficiently small size; the inside of this type of cover can be washed with water. Figure 7 As shown, the heater is electrically connected to the socket 16 via the plug 601. The heater assembly can be held in place by the cover 15, allowing the heater to be easily removed for cleaning. This feature makes the multi-functional electric heating cover easier to clean and is an improvement rather than a necessary feature.

[0052] Example 2 like Figure 8 and Figure 18 As shown, according to an embodiment of the second aspect of this utility model, a modular electric heating cover includes: a cover plate module and an electrical module; the cover plate module includes: a cover plate 1, an isolation cover 8, a heater 6, a main fan blade 7, and an electrical connection terminal one; the isolation cover is assembled with the cover plate, the heater and the main fan blade are disposed on the inner side of the isolation cover, and the heater is connected to the electrical connection terminal one; the electrical module includes: a housing, a motor 4, a control unit 5, a cooling fan blade 10, a power connector 11, and an electrical connection terminal two; the motor and the electrical connection terminal two are connected to the control unit 5, the control unit is connected to the power connector 11, and the cooling fan blade 10 is assembled on the shaft of the motor; the motor, control unit, cooling fan blade, power connector, and electrical connection terminal two are assembled in the housing to form the electrical module; the cover plate module and the electrical module are connected in a detachable manner; the cover plate module and the electrical module are electrically connected through the electrical connection terminal one and the electrical connection terminal two, and the motor and the main fan blade are connected by a transmission method of meshing, friction, or magnetic force.

[0053] Figure 8The diagram shows the two modules in a separate state. The upper component is the electrical module, and the lower component is the cover module. A magnified view (A) shows a portion of the electrical module, highlighting the location of the push button 13. The reciprocating arrows in view A represent the push button 13 locking and unlocking the two modules by sliding back and forth. The plug-in 601 on the cover module is used for electrical connection with the electrical module, and the latch 901 engages with the push button 13 for locking. The outer cover 9 can also be integrated with the lower handle cover 2, as shown in the attached diagram of Embodiment 1, achieving the same function. However, this would result in an overly large electrical module and a less compact structure. In this two-module design, disassembling this part of the lower handle cover and integrating it into the cover module is a better solution, but it is not a limitation.

[0054] Figure 9 The cross-sectional view shown illustrates the fit between the two modules when connected. Key connection points are magnified in the diagram. Partial magnification B shows the main fan blade 7 connected to the motor shaft 401 via a hose 703. The hose 703 is typically made of a flexible material, such as silicone tubing. For higher temperature resistance, fluororubber tubing or a spring can be used. This flexible connection method, due to the elastic deformation of the connector itself, eliminates vibration problems caused by misalignment between the motor and the main fan blade, significantly reducing the precision requirements for the connection between the two modules. However, other methods could also be used... Figure 17 The enlarged view G shows a meshing connection method. One end of the main fan shaft 701 has meshing teeth, and the motor shaft also has corresponding teeth that mesh with it. This method requires high precision in the fit; otherwise, it will generate significant noise. Magnetic connections can also be used. Magnetic connections can drive without physical contact. For example, the motor coil drives the permanent magnet rotor; they don't contact each other, but this is essentially a magnetic connection. As ordinary technicians in the industry, we can design various structures using meshing, friction, and magnetic force based on the above directional descriptions. Theoretically, there are infinitely many such specific structures, so only a few examples are given in the attached diagrams, along with some directional textual explanations. Figure 9Partial enlarged views C and D show how the front and rear ends of the two modules are connected by snap-fits. Snap-fit ​​201 at the front of the electrical module is first inserted at a certain angle into the pre-reserved gap in the outer cover 9 of the cover plate, then the rear end is pressed down. During this process, the plug-in piece 601 is inserted into the plug socket 16. After the rear end of the electrical module is pressed into place, the push button 13 is pushed to lock it. Partial enlarged view C shows the locked state, where snap-fit ​​901 catches the locking tongue of the push button 13, locking the two modules together. When the push button 13 is pushed to the other side, the locking tongue of the push button disengages from snap-fit ​​901. At this point, holding the cover plate module with one hand and lifting the handle with the other hand allows the two modules to be separated. Various easy-to-disassemble structures are widely used in the home appliance industry. This utility model specification and accompanying drawings only show one example as an explanation of how the two modules are disassembled and assembled, and should not be construed as a limitation of this utility model. This utility model can use any publicly available detachable structure. The purpose of designing the heating cover as a modular unit is to facilitate cleaning of the cover module. If it were connected to the electrical module, water could enter the electronic components, causing product damage or electrical leakage. Although the cover module has a heating element, it can be sealed. If a stainless steel heating element is used, the ceramic column at the electrical connection point can be sealed with silicone. Alternatively, similar to an immersion heater, a high-temperature resistant plastic injection seal can be used; simply lengthening the cold end of the stainless steel heating element is sufficient for this type of plastic injection seal. The heating element can also be designed for easy disassembly, allowing it to be removed for cleaning the cover module. However, the electrical module requires heat dissipation, necessitating ventilation holes. Even without considering ventilation holes, waterproofing such a large component is quite challenging. Therefore, the main purpose of the modular heating cover is to solve the cleaning problem for this type of product.

[0055] The modular electric heating cover of the second aspect of this utility model does not restrict the handle structure as much as the multifunctional electric heating cover of the first aspect. The multifunctional electric heating cover shown in Embodiment 1 aims primarily to design an easy-to-hold and lightweight electric heating cover; while the modular electric heating cover shown in this embodiment aims primarily to design an easy-to-clean electric heating cover. Although both aim to develop a better electric heating cover, and their technologies overlap and can be mutually referenced, their focuses are different. The modular electric heating cover in the accompanying drawings uses the handle structure of the multifunctional electric heating cover only to reduce drawing work and should not be considered a limitation of this utility model. The outer shell of the electrical module in this embodiment can be any shape, not limited by ease of handling and lightweight design. For example, a modular electric heating cover is used for... Figure 19 and Figure 20 The cooking utensils shown do not require a handle.

[0056] The modular heating lid shown in this embodiment solves the problem of air fryers and air fryer heads being difficult to clean and cannot be washed with water, which is a core issue for such products as cooking appliances. Meanwhile, the easy-to-hold and lightweight design, as described in Embodiment 1, to achieve multi-functionality, is also a solution included in this embodiment.

[0057] Optionally, the outer casing is a handle, which includes a grip for holding and a handle base for cooperating with the cover module. The handle base is connected to one end of the grip. The control unit 5 is disposed in the handle, and the power connector 11 is disposed at the tail end of the handle. The motor 4 is disposed in the handle base, and the cooling fan 10 is connected to the motor 4. The handle base has heat dissipation holes along the circumference of the cooling fan. The cover module also includes an outer cover 9, which is disposed outside the isolation cover 8. The handle base and the outer cover 9 are provided with a buckle, and the cover module and the electrical module are connected through the buckle. Figures 8 to 18 The attached diagrams all utilize this feature, combining the advantages of modular and multifunctional heating covers. This achieves advantages such as easy handling, lightweight design, easy cleaning, and multifunctionality. Its structure is simply a combination of the aforementioned features and will not be elaborated further. This feature is only one of several implementation schemes and is a preferred feature, not a necessary one.

[0058] Optionally, the first electrical connection terminal includes a plug-in plate 601, a fixing base 602, and a fixing base cover 603; the second electrical connection terminal is a plug-in socket 16; the plug-in socket 16 is disposed in the housing of the electrical module, and the plug-in socket is connected to the control unit 5; the two electrical terminals of the heater 6 are connected to the plug-in plate 601, and the heater and the plug-in plate are assembled in the fixing base 602 and the fixing base cover 603 to form a heater assembly; the plug-in plate and the plug-in socket are plugged in and out. Figure 4 , Figure 5 , Figure 9 , Figure 11 As shown in Figure 1, its structure and purpose are the same as those described in Embodiment 1, which is to waterproof the heater or make it easy to disassemble and clean, and will not be repeated here.

[0059] Figures 16 to 18 Another structure is proposed, adding a small circuit board 604. The heater 6, the plug-in plate 601, the temperature sensor 501, and the thermal fuse 504 are all soldered onto the small circuit board. The temperature sensor's solder joints are reserved at an appropriate height. After the small circuit board is assembled into the cover module, the temperature sensor is placed as close as possible to the outer surface of the isolation cover 8 to achieve good heat transfer and quickly and accurately sense the temperature inside the isolation cover. The thermal fuse 504 is connected in series with the heater 6 and melts in the event of uncontrolled overheating of the cover, preventing personal and property safety risks caused by uncontrolled heating. Figure 17 The 3D cross-sectional view shows one structure of the cover module. The enlarged part F shows the specific assembly relationship between the small circuit board assembly and other components, as well as how this part achieves sealing and waterproofing. The small circuit board 604 is assembled onto the outer cover 9 of the cover plate. The openings and gaps at the plug-in points are sealed by the sealing plate 903 and the pressure cover 904. The bottom is sealed by the sealing ring 902 and the isolation cover. The lead-out end of the heater is sealed by the sealing tube 606 and the isolation cover. With these three seals, the cover module can be washed with water at will. Figures 16 to 18 The solution shown can be combined with the solution described above, that is, the temperature sensor and the temperature fuse can be assembled in the mounting base 602 and the mounting base cover 603.

[0060] Optionally, such as Figures 12 to 14 As shown, it also includes a bearing 702 and a flexible transmission component. The main fan blade 7 is fixed to the cover plate module via the bearing, and the main fan blade is connected to the motor 4 via the flexible transmission component. The flexible transmission component includes components such as hoses and springs, a feature that has already been specifically described in Embodiment 1 and will not be repeated here.

[0061] The difference between this embodiment and Embodiment 1 is that a modular design has been implemented, and the limitation of the handle structure has been removed. Unless there is a conflict, the structure and solution in Embodiment 1 can be adopted in this embodiment.

[0062] Example 3 like Figure 19 and Figure 20 As shown, a cooking appliance according to an embodiment of the third aspect of this utility model includes the aforementioned modular heating lid. The cooking appliance in the figure is an air fryer. Figure 19The diagram shows a cross-sectional view. The control unit 5, as illustrated, uses mechanical components. The control unit includes a temperature controller 506 and a timer 507. The temperature controller 506 controls the temperature of the air fryer, and the timer controls the time. Embodiment Two can also use the mechanical components described in this embodiment as the control unit. The advantage of mechanical control components is their low cost and higher reliability compared to electronic control. However, their control precision and intelligence are far inferior to electronic control. Electronic circuit boards can be laid out according to the shape of the outer casing, offering greater flexibility and maximizing space utilization. Therefore, mechanical control is generally only used in products with lower requirements and more space. As described in Embodiment One, the air fryer aims to guide airflow to the bottom of the pot 20 using the walls of the pot 20, allowing it to pass through the gaps between the food items and flow back to the central area of ​​the main fan blade 7. Therefore, the sidewall of the mesh cover 15 shown in the diagram has numerous holes along its circumference, allowing some airflow to flow radially to the pot wall. Since the cover plate 1 seals the top opening of the pot 20, the airflow, under the influence of wind pressure and centrifugal force generated by rotation, can only flow downwards along the sidewall of the pot. The heater 6, installed in the cover module, is electrically connected to the electrical module via contact points. The heater 6 is connected to contact 23, and contact 24 is fixed to spring 25, which is fixed within the electrical module. This electrical module is actually the air fryer's body. The spring is connected in series with the temperature controller 506 and the timer 507. The diagram shows the product cut in half; only one contact or spring is shown, but there is actually a pair of live and neutral wires. When... Figure 19 When the cover module and electrical module are assembled together, contact one presses against contact two to achieve electrical connection. In this embodiment, the power connector is a power cord. Since the air fryer is a stationary appliance and does not need to be held in the hand or frequently moved, fixing the power cord to the machine is not inconvenient and is a better choice. This can prevent the power cord from being lost or having to look for it when using the appliance.

[0063] Figure 20 This is a schematic diagram of the cover module being detached from the electrical module. Unscrewing screw 26 unlocks the module, allowing it to be removed for cleaning. Alternatively, it can be locked and unlocked using a snap-fit ​​mechanism as shown in Embodiment 2. Where there is no conflict, the structures of the first two embodiments and this embodiment can be combined, and will not be elaborated further here.

[0064] The above embodiments do not exhaust all structures and methods. All combinations of the above solutions, as well as any solutions that can be easily conceived through this utility model, are within the protection scope of this utility model.

Claims

1. A multifunctional electric heating cap, characterized in that, include: Cover plate, used to fit other containers or for heat retention; Handles are used for gripping and assembling related components; The device comprises a heater, a motor, a main fan blade, an isolation cover, a control unit, a cooling fan blade, and a power connector. The handle includes a grip for holding and a handle base for engaging with the cover plate. The handle base is connected to one end of the grip and to the cover plate. The control unit is located within the grip, and the power connector is located at the tail end of the grip. The motor is located within the handle base, and the cooling fan blade is connected to the motor. The handle base has circumferential ventilation holes along the cooling fan blade. The handle also has an air intake port, positioned so that the airflow driven by the cooling fan blade passes through the area in the handle requiring cooling. The isolation cover is located on the handle base or the cover plate, and the main fan blade and the heater are located on the side of the isolation cover facing away from the handle. The main fan blade is connected to the motor, the heater and motor are connected to the control unit, and the control unit is connected to the power connector.

2. The multifunctional electric heating cap according to claim 1, characterized in that: It also includes a conductive sheet, which is disposed on the inner wall of the handle for gripping. The conductive sheet is connected to the control unit by a wire or spring. The control unit uses capacitance changes to sense whether a hand is gripping the handle, thereby controlling the working state of the heater.

3. The multifunctional electric heating cap according to claim 1, characterized in that: It also includes a cover or mesh, which uses its sidewalls to guide the radial airflow driven by the main fan blades into an axial flow. By designing the angle and height of the sidewalls of the cover or mesh, the diffusion angle of the axial airflow is adjusted, so that the airflow driven by the main fan blades can effectively act on the food.

4. A multifunctional electric heating cap according to claim 1, characterized in that: It also includes a heat insulation layer, which is disposed on the outside of the isolation cover to reduce the diffusion of heat generated by the heater to the outside of the isolation cover.

5. A multifunctional electric heating cap according to claim 1, characterized in that: It also includes a power socket, a power strip, a mounting base, and a mounting base cover. The power socket is disposed in the handle and is connected to the control unit. The two terminals of the heater are connected to the power strip. The heater and the power strip are assembled in the mounting base and the mounting base cover to form a heater assembly. The power strip is plugged into and unplugged from the power socket.

6. A modular electric heating cover, characterized in that, include: Cover plate module, electrical module; The cover module includes: a cover plate, an isolation cover, a heater, a main fan blade, and an electrical connection terminal one; the isolation cover is assembled with the cover plate, the heater and the main fan blade are disposed inside the isolation cover, and the heater is connected to the electrical connection terminal one; the electrical module includes: a housing, a motor, a control unit, a cooling fan blade, a power connector, and an electrical connection terminal two; the motor and the electrical connection terminal two are connected to the control unit, the control unit is connected to the power connector, and the cooling fan blade is assembled on the shaft of the motor; the motor, control unit, cooling fan blade, power connector, and electrical connection terminal two are assembled in the housing to form the electrical module; the cover module and the electrical module are connected in a detachable manner; the cover module and the electrical module are electrically connected through electrical connection terminal one and electrical connection terminal two, and the motor and the main fan blade are connected by transmission through meshing, friction, or magnetic force.

7. A modular electric heating cover according to claim 6, characterized in that: The outer casing is a handle, which includes a grip for holding and a handle base for engaging with the cover module. The handle base is connected to one end of the grip. The control unit is disposed in the grip, and the power connector is disposed at the tail end of the grip. The motor is disposed within the handle base, and the cooling fan is connected to the motor. The handle base has heat dissipation holes arranged circumferentially along the cooling fan. The cover module also includes an outer cover, which is disposed outside the isolation cover. The handle base and the outer cover are provided with a snap fastener, and the cover module and the electrical module are connected through the snap fastener.

8. A modular electric heating cover according to claim 6, characterized in that: The first electrical connection terminal includes a plug plate, a mounting base, and a mounting base cover; the second electrical connection terminal is a plug socket; the plug socket is disposed in the housing of the electrical module and is connected to the control unit; the two terminals of the heater are connected to the plug plate; the heater and the plug plate are assembled in the mounting base and the mounting base cover to form a heater assembly; the plug plate and the plug socket are plugged in and out.

9. A modular electric heating cover according to claim 6, characterized in that, It also includes bearings and flexible transmission components. The main fan blade is fixed to the cover plate module by the bearing, and the main fan blade is connected to the motor by the flexible transmission component.

10. A cooking utensil, characterized in that, Including a modular electric heating cover according to any one of claims 6 to 9.

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