Heating device and cooking utensil

Abstract

The invention discloses a heating device and a cooking utensil with the same. The heating device comprises a heating assembly and a fan assembly. The heating assembly comprises a heat insulation part, an electric heating element and an infrared transmission part, the heat insulation part and the infrared transmission part are arranged on the two sides of the electric heating element respectively, the heating assembly with one side insulating heat through the heat insulation part and the other side transferring heat energy through the infrared transmission part is formed, and the heating assembly is provided with a through hole; the fan assembly comprises a motor and fan blades, the motor is arranged on one side of a heat insulation part of the heating assembly, the fan blades are arranged on one side of an infrared transmission part of the heating assembly, and the motor and the fan blades are connected through a through hole of the heating assembly. The heating device has the advantages of being not prone to oil dirt accumulation and convenient to clean.

Description

Technical Field

[0001] The present invention relates to the technical field of cooking appliance manufacturing, and more particularly, to a heating device and a cooking appliance having the heating device. Background Art

[0002] In related technologies, in areas such as air fryers, ovens, and the head covers of air fryers, the regions where the electric heating elements and the fan blades are located are difficult to clean due to the obstruction of various components, which has been widely criticized by users and has become a persistent problem in the industry. Summary of the Invention

[0003] The present invention aims to at least solve the technical problems existing in the prior art. For this purpose, the present invention provides a heating device, which has the advantages of being not prone to oil fouling and being convenient to clean.

[0004] The present invention also provides a cooking appliance having the heating device, which has one or more advantages of being not prone to oil fouling, being convenient to clean, having multiple functions, being beautiful and light.

[0005] To achieve the above object, according to an embodiment of the first aspect of the present invention, a heating device is provided, the heating device includes: a heating assembly, a fan assembly; the heating assembly includes a heat insulation member, an electric heating element, and an infrared transmissive member, the heat insulation member and the infrared transmissive member are respectively disposed on both sides of the electric heating element, forming a heating assembly in which heat energy is insulated on one side by the heat insulation member and transmitted on the other side by the infrared transmissive member, and the heating assembly is provided with a through hole; the fan assembly includes a motor and a fan blade, the motor is disposed on one side of the heat insulation member of the heating assembly, the fan blade is disposed on one side of the infrared transmissive member of the heating assembly, and the motor and the fan blade are connected through the through hole of the heating assembly.

[0006] A heating device according to an embodiment of the present invention has the advantages of being not prone to oil fouling and being convenient to clean.

[0007] In addition, the heating device according to the above embodiment of the present invention may further have the following additional technical features:

[0008] Optionally, the infrared transmissive member is a flat glass sheet, and the flat glass sheet is provided with a central hole. The use of a flat glass sheet as the infrared transmissive member has the advantages of low cost, simple and compact structure, and easy surface cleaning.

[0009] Optionally, the electric heating element is a resistance wire, and the resistance wire is assembled on the heat insulation member. Using a resistance wire as the electric heating element has the advantages of low cost, mature technology, and reliable life.

[0010] Optionally, it further includes a heater housing and a riveting sleeve. The heater housing is provided with holes according to the positions of the through-holes of the heating assembly. At least one side of the heater housing is open. The infrared transmissive member is disposed on the open side of the heater housing. The heat insulation member, the electrothermal element, and the infrared transmissive member are sequentially assembled in the heater housing. The riveting sleeve passes through the through-hole of the heating assembly to rivet and fix the heater housing, the heat insulation member, the electrothermal element, and the infrared transmissive member; the motor and the wind blade are connected through the hole of the riveting sleeve.

[0011] Optionally, it further includes a cover net. The wind blade is disposed on the cover net and at least maintains a rotational freedom degree. The wind blade is drivingly connected to the motor by one of meshing, friction, and magnetism. The cover net can be disposed on the heating assembly or on other devices associated with the heating device. This feature has the advantage of being more convenient for cleaning the wind blade.

[0012] Optionally, it further includes a cooling wind blade. The cooling wind blade is disposed on the shaft of the motor and is between the motor body and the heat insulation member. This feature is a low-cost and compact cooling solution.

[0013] According to the cooking appliance with the heating device proposed in the embodiment of the present invention, the cooking appliance includes the heating device according to any one of claims 1 to 7.

[0014] Optionally, the cooking appliance further includes: a cover plate, an electrical housing, a control unit, and a power connector; the control unit, the heating device, and the power connector are disposed in the electrical housing; the cover plate is connected to the electrical housing. Description of the Drawings

[0015] The present invention will be further described below in conjunction with the drawings and embodiments

[0016] Figure 1 is a three-dimensional sectional view of a heating device

[0017] Figure 2 is a sectional view of a heating device

[0018] Figure 3 is an exploded view of a heating device

[0019] Figure 4 is a schematic diagram of another heating device

[0020] Figure 5 is a schematic diagram of a wind blade assembly

[0021] Figure 6 is a sectional view of a cooking appliance

[0022] Figure 7 is a three-dimensional sectional view of a cooking appliance

[0023] Figure 8 is an exploded view of a cooking appliance

[0024] Figure 9 is a sectional view of another cooking appliance

[0025] Figure 10 is an exploded view of another cooking appliance

[0027] Reference numerals: motor 101, heating element 102, infrared transmissive member 103, fan blade 104, heat insulation member 105, heater housing 106, cooling fan blade 107, riveted sleeve 108, bushing 109, bearing 110, fan blade shaft 111, rubber hose 112, cover net 113, friction drive member 114, ceramic base 115, lead wire 116, nut 117, screw 118, base 201, lower head cover 202, middle head cover 203, upper head cover 204, pot 205, storage net 206, thermostat 207, timer 208, knob 209, cover plate 210, power cord 211, thermal fuse 212, upper handle cover 301, lower handle cover 302, control unit 303, temperature sensor 304, power supply connector 305. Detailed implementation manners

[0028] Embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where the same reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation of the present invention.

[0029] In the present invention, it should be noted that, on the premise of no conflict, the embodiments and features in the embodiments in the present application can be combined with each other, and any solution that can be easily conceived through the present invention is within the protection scope of the present invention. The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0030] Embodiment 1

[0031] As Figure 1As shown in the figure, a heating device includes a heating component and a fan component. The heating component includes a heat insulation member 105, an electric heating element 102, and an infrared transmissive member 103. The heat insulation member 105 and the infrared transmissive member 103 are respectively arranged on both sides of the electric heating element 102, forming a heating component that insulates heat on one side and transfers heat energy through the infrared transmissive member on the other side. The heating component is provided with a through-hole. The fan component includes a motor 101 and a wind blade 104. The motor 101 is arranged on one side of the heat insulation member 105 of the heating component, and the wind blade 104 is arranged on one side of the infrared transmissive member 103 of the heating component. The motor and the wind blade are connected through the through-hole of the heating component.

[0032] To better understand the problems solved by the present invention, the prior art will be analyzed in detail first: In existing cooking appliances similar to air fryers, oil stains accumulate in the areas where the heaters and wind blades are located. Due to the obstruction of the heaters, wind blades, and other structures, it is very difficult for users to wipe and even impossible to clean. The high-temperature surface of the heater itself, because its temperature is always higher than any other position in the system, oil fumes cannot condense on its high-temperature surface, and due to the high-temperature ablation effect on the surface of the heater, the attached oil stains will also be burned off. Therefore, after long-term use of an air fryer or an oven, the high-temperature surface of the heater is very clean, but dry and hard oil stains still adhere to the cold end of the heater. The wind blade, when rotating at high speed during operation, its centrifugal force will throw off the oil that condenses on it, playing a certain self-cleaning role, and the frequency of cleaning required is relatively low. The components used to isolate, install, and support the wind blade and the heater, the leads of the heater, etc., have uneven surfaces and block each other, which are the hardest-hit areas for accumulating oil stains and are difficult to clean. One can only use paper towels and small cloth strips with the help of slender tools to wipe bit by bit. After a long time, the dry and hard oil stains cannot be wiped off, and a cleaning agent needs to be used. Even so, it is impossible to be truly clean like washing with water. For an air fryer, the areas where the above-mentioned oil stains accumulate are above the food. When baking food, the oil stains may be melted and dripped onto the food; or in the early heating stage, a large amount of water in the food evaporates and condenses on the above-mentioned surface, and the condensed water drops bring the oil stains to the food. In the later stage when the food moisture decreases and the surface starts to char, this process is reversed, and the food generates oil fumes that adhere to the inner surface of the air fryer. The oil stains in the area of the top heater and the wind blade repeat the process of eating the old and replenishing the new each time; the high-temperature decomposition of the oil stains may also produce some toxic components. In short, for a cooking appliance, the positions that are directly or indirectly in contact with food must be able to be easily cleaned or washed, which should be a basic requirement for a cooking appliance. In fact, even the stove that is not in contact with the food ingredients must be kept clean. Therefore, it is very necessary to improve existing cooking appliances similar to air fryers.

[0033] As Figure 1The heating device shown in the figure includes a heater housing 106, but it is not an essential component and its existence can be ignored for now. The motor 101 is disposed on one side of the heat insulation member 105. However, this does not mean that the motor needs to be installed on the heat insulation member or other parts of the heating device. When the heating device is installed in a specific product, the motor can be fixed to other parts that do not belong to the heating device. Being disposed on one side of the heat insulation member only represents an orientation relationship. The motor must utilize the heat insulation member to insulate it from the high temperature of the electric heating element 102 to prevent damage. Of course, it is also an optional solution to assemble the motor 101 on the heat insulation member, which specifically depends on the structure in which the heating device is installed. The electric heating element 102 is sandwiched between the heat insulation member 105 and the infrared transmissive member 103 as shown in the figure. The heat energy generated by the electric heating element 102 needs to be transmitted through the infrared transmissive member 103, and on the other side or around, heat insulation depends on the heat insulation member. The fan blade is used to drive air circulation to make the heating more uniform, so that the hot air can act on the surface of the food that cannot be irradiated by heat radiation, and the heating efficiency is improved through forced convection heating. The fan blade 104 is disposed on one side of the infrared transmissive member 103 of the heating assembly. Similar to the above-mentioned motor, the fan blade being disposed on one side of the infrared transmissive member only represents a position and does not indicate its assembly relationship. The fan blade only needs to be on this side of the infrared transmissive member. The fan blade can be directly assembled on the motor shaft extending to one side of the infrared transmissive member; or a shaft can be provided on the fan blade to extend to one side of the heat insulation member to connect with the motor; the fan blade can also be assembled on other related parts that do not belong to the heating device and keep a transmission connection with the motor. The motor and the fan blade are connected through the through hole of the heating assembly. This connection can be in contact or not in contact; it can be directly connected or indirectly connected. For example, magnetic connection can transmit power without contact. In short, the motor and the fan blade are connected through the through hole of the heating assembly, which can be that a certain transmission structure passes through the through hole to establish a connection between the motor and the fan blade, or it also includes that a certain force passes through the through hole to establish a connection between the two.

[0034] As Figure 1 and Figure 2 shown in the heating device, referring to Figures 6 to 10 the assembly structure of the heating device in the actual product, it can be seen that one surface of the infrared transmissive member 103 and the fan blade need to be in contact with the oil fume, but other components of the heating device and the surface do not necessarily need to be in direct contact with the oil fume. For example, the side surfaces of the infrared transmissive member 103 and the heat insulation member (when considering the case without the heater housing 106) will be covered by a cover net 113 as shown in Figure 6 and will not be in contact with the oil fume, and the back surfaces of these parts and the motor are also completely isolated by other structures. Therefore, Figure 1 Figure 2For the heating device shown, only the problems of whether the front of the infrared transmissive member and the fan blades are prone to oil fouling and whether they are convenient to clean need to be considered. As mentioned before, there is no oil stain on the high-temperature surface of the heater in the traditional technology, and the fan blades have a self-cleaning effect due to centrifugal force, so the frequency of cleaning is low; moreover, if the infrared transmissive member 103 adopts the planar shape shown in the figure, it is also more convenient to clean, and the fan blades can be removed for cleaning by unscrewing the nuts. The problem of the existing technology is that the position parts of the heater and the fan blades are stacked, block each other, have complex curved surfaces and messy structures, resulting in easy fouling and difficult cleaning. Especially when using a heating tube coiled in a mosquito-repellent incense shape as the heater, since it does not mainly rely on thermal radiation like a carbon fiber heating tube, its surface temperature cannot be too high, and it mainly relies on forced air convection to take away heat energy, so the fan blades must be arranged on the back of the heater, making it even more difficult to disassemble and assemble. At the same time, such stainless steel heating tubes may also have oil fouling on their surfaces. The infrared transmissive member 103 of the present invention can be made of materials such as glass and ceramics, and the surfaces of these materials are also easier to clean than metal surfaces. However, due to structural limitations in the traditional technology, the components used to install and support the heater can only be made of metal. Therefore, the heating device of the present invention solves the problems of easy oil fouling and difficult cleaning in the existing technology.

[0035] The infrared transmissive parts 103 in the attached drawings of the present invention are all in the shape of wafers, which is a preferable solution for products such as air fryers. The infrared transmissive parts can be deformed in various ways according to the specific uses of the heating devices, such as arc-shaped, annular, square, etc. If there is a heater housing 106 as shown in the figure for support, the heat insulation part 105 can be made of the material and process of the heating plate of an induction cooker. If there is no heater housing 106, the heat insulation part can be processed with materials having a certain strength by itself, such as refractory cement, adding expanded perlite or nano-aerogel to reduce the heat transfer coefficient, and adding glass fiber to increase the strength. The heat insulation part can also adopt other composite solutions, such as using mica sheets or ceramic sheets as the support of the electric heating element 102, and using rock wool, glass wool, nano-aerogel felt, etc. to pad behind for heat insulation. In the figure, the electric heating element 102 is a flat resistance wire, and the purpose of being flat is to increase the proportion of the heat radiation power of the electric heating element in the three heat transfer methods. Radiation heating has a certain penetrability to food; it reaches the heated object directly from the heat source at the speed of light, which is faster and has less loss than heat conduction heating. In application scenarios such as baking food, it is meaningful to increase the proportion of heat radiation in the power. According to the Stefan-Boltzmann formula, the power of heat radiation is proportional to the area of the emission source. With the same cross-sectional area of the resistance wire, the surface area of the flat wire is much larger than that of the round wire. The electric heating element 102 can also adopt a carbon fiber heating tube, a halogen heating tube, a stainless steel electric heating tube, a ceramic heater, a silicon carbide heater, etc. However, since it is installed behind the infrared transmissive part 103, the fan blade 104 cannot directly cool the surface of these electric heating elements. As mentioned above, heat radiation is proportional to the surface area of the emission source and is also proportional to the fourth power of the temperature of the heat source. Among the heaters mentioned later, their surface areas are much smaller than that of the flat resistance wire under the same volume. And through convection and heat conduction, since there is an infrared transmissive part 103 in between, the power transmitted by these two methods is limited, and mainly depends on heat radiation. Therefore, only by raising the temperature of the electric heating element can it be considered whether it will overheat and reduce the service life. However, according to the Stefan-Boltzmann formula, the power of heat radiation is proportional to the fourth power of the temperature. By raising the temperature of the electric heating element, the heat radiation power can be exponentially increased, and a cost-effective electric heating element can be preferentially selected after theoretical calculation and experimental verification. In the figure, the through hole of the heating assembly is arranged at the center of the heating assembly, which is a preferable solution and the structure is more compact, and it can deviate from the center according to the actual situation.

[0036] Optionally, the infrared transmissive part 103 is a flat glass sheet, and the flat glass sheet is provided with a central hole. The selection of the glass material should consider the transmittance of the infrared wavelength, the expansion coefficient and the strength. Generally speaking, glass-ceramics and quartz glass can both be adopted. The infrared transmissive part adopting a flat glass sheet has the advantages of low cost, simple and compact structure, and easy surface cleaning. This feature is not an essential feature. Besides glass, the infrared transmittance of some ceramics is also good. In addition, when the heating device is used in some specific products, arc-shaped glass may be more suitable.

[0037] Optionally, the electrothermal element is a resistance wire, and the resistance wire is assembled on the heat insulation member. The operating temperature of the heating device determines the temperature of the electrothermal element. The appropriate material of the resistance wire should be selected according to its temperature. In application scenarios such as air fryers, ovens, and even stoves, as long as the oil fume and salt spray do not directly contact the resistance wire, the use requirements can be met by using an iron-chromium-aluminum resistance wire. Figure 1 and Figure 3 As shown, both ends of the resistance wire are connected to the lead wire 116, and the lead wire is electrically connected to the external circuit. The ceramic seat 115 is used to fix the connection position and provide insulation protection. If the heat insulation member 105 has sufficient strength, the structure of the ceramic seat can be directly integrated into the heat insulation member. Using a resistance wire as the electrothermal element has the advantages of low cost, mature technology, and reliable service life.

[0038] Optionally, as Figures 1 to 3 shown, a heater housing 106 and a riveting sleeve 108 can also be added. The heater housing is provided with holes according to the through-hole positions of the heating assembly. At least one side of the heater housing is open. The infrared transmissive member is arranged on the open side of the heater housing. The heat insulation member, the electrothermal element, and the infrared transmissive member are sequentially assembled in the heater housing. The riveting sleeve passes through the through-hole of the heating assembly to rivet and fix the heater housing, the heat insulation member, the electrothermal element, and the infrared transmissive member; the motor and the fan blade are connected through the hole of the riveting sleeve. As shown in the figure, in fact, the heating assembly can also be directly fixed by flanging the outer edge of the heater housing, but there is a structure pressing on the surface of the infrared transmissive member 103. Although this structure may be only a few tenths of a millimeter thick, it will also affect the cleaning of the surface of the infrared transmissive member. Riveting at the center has less impact. Of course, an interference fit method can also be used for installation, making the outer diameter of the infrared transmissive member slightly larger than the air diameter of the heater housing and forcibly pressing for assembly, which is also a feasible solution, but it requires high machining accuracy for parts. This feature is a more specific heating assembly solution, and the attached drawings also show examples in this way, but it is not a necessary feature. There can be various structures to achieve the purpose of the present invention.

[0039] In another embodiment, the fan blade 104 is not directly fixed to the shaft of the motor 101 so that tools do not need to be used to disassemble and assemble the fan blade during cleaning. As Figure 4As shown in the figure, it further includes a cover net 113. The wind blade 104 is arranged on the cover net and at least maintains the freedom of rotation. The wind blade is drivingly connected to the motor by one of meshing, friction, and magnetic force. The cover net can be arranged on the heating component or on other devices associated with the heating device. For the heating device itself for achieving the purpose of the present invention, the cover net 113 is unnecessary. However, in actual products such as air fryers and ovens, it may be necessary to isolate and protect the wind blade. When the cover net is provided in the product, it is necessary to remove the cover net for cleaning during cleaning because the cover net needs to be light-transmissive and air-permeable, is a porous part, and is prone to attaching oil stains and is not easy to clean, and must be removed for cleaning. The feature of this embodiment is that when the cover net is removed, the wind blade is also removed at the same time and cleaned together with the wind blade. As Figure 4 shown, the wind blade shaft 111 is fixed to the wind blade 104 by a nut 117. Both ends of the wind blade shaft are respectively connected to a friction transmission member 114 and a bearing 110, and the bearing is connected to the cover net 113. Figure 5 is a schematic diagram of a wind blade assembly, including a rubber tube 112, a wind blade 104, a wind blade shaft 111, a bearing 110, and a nut 117 not marked. There are various structures to achieve the purpose of this embodiment. For example, the rubber tube 112 or the friction transmission member 114 is not required, and the wind blade shaft 111 is directly connected to the motor; the wind blade shaft can also be integrated into the wind blade as a component of the wind blade part; or the rubber tube or the friction transmission member is assembled on the shaft of the motor instead of on the wind blade assembly, which is also equivalent; similarly, the bearing can also be assembled on the cover net 113 instead of on the wind blade assembly, which is also equivalent. The wind blade assembly can be directly pulled out from the cover net instead of being fixed on it, otherwise it will also make it difficult to clean both the cover net and the wind blade. Figure 4 shown is the state where the wind blade assembly is separated from the motor. When the cover net 113 is assembled in place, the friction transmission member 114 is pressed together with the shaft of the motor, and transmission is carried out by using friction. The friction transmission member 114 or Figure 5 the rubber tube 112 shown is preferably made of an elastic material, so as to eliminate vibrations caused by the misalignment of the motor and the wind blade assembly or other poor fits. For example, the rubber tube can be made of a silicone tube. The bearing is not necessarily required, and direct hole-shaft fit can be used. For example, the shaft of the wind blade is inserted into the hole of the cover net 113, or vice versa. Some motors do not use ball bearings and instead use a higher-precision hole-shaft fit.

[0040] As Figures 2 to 4As shown, the heating device can be provided with a cooling fan 107, which is arranged on the shaft of the motor 101 and located between the motor body and the heat insulation member. The cooling fan can dissipate heat from the motor and other related components, directly utilizing the existing motor to achieve the heat dissipation function, which is a technical solution with the lowest cost and greater compactness. However, if the device where the heating device is located already has other heat dissipation methods, or does not require a heat dissipation system and will not overheat, then the cooling fan is not needed. Therefore, the cooling fan is an improved or alternative feature rather than an essential feature.

[0041] Embodiment 2

[0042] As Figure 6 and Figure 8 shown, a cooking appliance having the heating device of the present invention includes the heating device according to any one of claims 1 to 6.

[0043] In the illustrated cooking appliance, which is an air fryer, it is divided into two main parts, a base assembly and a head assembly, and it adopts a flip-up structure. The head assembly can rotate relative to the base assembly. The base assembly mainly includes a base 201, a pot 205, a storage net 206, and a power cord 211; the head assembly mainly includes the heating device of the present invention, as well as a lower head cover 202, a middle head cover 203, an upper head cover 204, a thermostat 207, a timer 208, a knob 209, and a cover plate 210.

[0044] Its working principle is as follows: the food placed on the storage net 206 is heated by using thermal radiation and forced convection of hot air. The heat source is the heating device of the present invention. Figure 6 As a cross-sectional view, as shown, the heating device is arranged on the lower head cover 202. The lead wire 116 of the heating device is connected to the illustrated thermostat 207 and timer 208. The temperature controller 207 controls the temperature of the air fryer, and the timer 208 controls the time. Figure 7 It is a three-dimensional sectional view of the air fryer, from which the positional relationship of each component can be seen more stereoscopically. Figure 8 It is a disassembly view when the air fryer needs to be cleaned. As shown, as long as the cover net 113 is rotated in the direction of the arc arrow shown for unlocking, and then moved in the direction of the straight arrow, the cover net 113 and the cover plate 210 can be taken out. These two components can be directly washed with water. Regarding the cleaning problem of the heating device, as described in Embodiment 1, it may not need to be cleaned or is easy to clean. The fan 104 can also adopt Figure 4 and Figure 5 the structure shown, then when the cover net 113 is removed, the fan is also removed together. However, the frequency of cleaning the fan may not be high, so it can also use Figures 6 to 8 the structure shown, which is simpler and more reliable.

[0045] Regarding air fryers, there is also a popular drawer - type structure on the market where the machine head and the base are integrated. Compared with this flip - type structure, the existing products with drawers are more difficult to clean. However, if the air fryer with a drawer - type structure adopts the heating device of the present invention, it is also very convenient to clean: it does not have the flip - type cover plate 210, and only the cover net 113 is connected to the heating device. One can simply remove the cover net to facilitate the cleaning work. As explained in Embodiment 1, the heating device of the present invention is not prone to oil fouling and is convenient to clean. Applying the heating device of the present invention to related products, for those of ordinary skill in the art, they can simply replace the products of the original technology through the description of the present invention, including ovens. Therefore, the description of the present invention does not separately provide drawings for various replacement schemes.

[0046] In the case of no conflict, the structures and solutions in Embodiment 1 can all be adopted in this embodiment.

[0047] Embodiment 3

[0048] As Figure 9 and Figure 10 shown, it is another cooking appliance with the heating device of the present invention. The cooking appliance shown in the figure is an electric heating cover. It includes: a cover plate 210, an electrical housing, a control unit 303, and a power supply connector 305; the control unit, the heating device, and the power supply connector are arranged in the electrical housing; the cover plate is connected to the electrical housing. The structure in this embodiment is a modification of Embodiment 2, removing the base assembly for container and placement purposes, and only retaining the machine - head part for heating purposes. The structure in the attached drawing also makes improvements to the machine - head part. For example, the control part of the heating device adopts electronic control instead of Figures 6 to 8The mechanical control shown has an electrical housing with a handle structure, all aimed at lightweight and easy handling, making it more suitable for various application scenarios of the electric heating lid. The electric heating lid can be placed on a suitable container for use similar to an air fryer, can be used in conjunction with other cooktops for assisted frying, can achieve frying both sides simultaneously without the need to turn over, and there is no worry about oil splashing; it can use other cooktops to assist in baking food. At this time, the other cooktop is equivalent to adding a heat source at the bottom, just like an oven or air fryer with multiple heat sources. Roasting food also does not require turning over, and its capacity depends on the size of the cookware and can be adjusted, which is more convenient; it can be placed on a bowl to keep the dishes warm, preventing the previously cooked dishes from getting cold and then having to be reheated; it can be placed on a suitable stand as a small sun for heating. In short, the structure of the electric heating lid is not restricted by the air fryer and oven, making its uses very extensive. Of course, to make users willing to use it in so many scenarios, it must be light and easy to hold. If it is heavy or inconvenient to hold, users are less likely to use it. The design in the figure is to make its weight and volume as close as possible to that of an ordinary glass pot lid. The accompanying drawings of this embodiment show that the cover plate 210 is pressed tightly under the handle lower cover 302 through the cover net 113, and the cover net is locked to the handle lower cover 302 with screws. The installation method of the cover net 113 can also adopt the structure in the second embodiment, which can be unlocked or locked directly by rotation without the need for tools. Of course, without the cover net, it is also possible to lock the cover plate 210 to the handle lower cover 302 directly with screws or other methods.

[0049] Figure 9 and Figure 10 This is a structure of an electric heating lid with a handle that is convenient to hold in this embodiment, but it is only a special case of this embodiment. The electric heating lid can also be made in the style of an air fryer head, without the handle shown in the figure, and only a handle for lifting.

[0050] Without conflict, the structures of the first two embodiments and this embodiment can be combined and used, which will not be elaborated here.

[0051] The above several embodiments do not exhaust all structures and methods. The combination of all the above solutions and any solutions that can be easily conceived through the present invention are within the protection scope of the present invention.

Claims

1. A heating device, characterized in that, include: A heating component and a fan component; the heating component includes a heat insulating component, an electric heating element, and an infrared transmission component, the heat insulating component and the infrared transmission component are respectively arranged on both sides of the electric heating element, forming a heating component that is insulated by the heat insulating component on one side and transfers heat energy by the infrared transmission component on the other side, and the heating component is provided with a through hole; the fan component includes a motor and a fan blade, the motor is arranged on one side of the heat insulating component of the heating component, the fan blade is arranged on the side of the infrared transmission component of the heating component, and the motor and the fan blade are connected through the through hole of the heating component.

2. The heating device according to claim 1, wherein: The infrared transmission member is a glass flat sheet, and the glass flat sheet is provided with a central hole.

3. A heating device according to claim 1 or 2, characterized in that: The electric heating element is a resistance wire, and the resistance wire is assembled on the thermal insulation component.

4. A heating device according to claim 1 or 2, characterized in that: It also includes a heater shell and a riveted sleeve. The heater shell is provided with holes according to the positions of the through holes of the heating component. At least one side of the heater shell is open. The infrared transmission component is arranged on the open side of the heater shell. The heat insulating component, the electric heating element and the infrared transmission component are sequentially assembled in the heater shell. The riveted sleeve passes through the through holes of the heating component to rivet and fix the heater shell, the heat insulating component, the electric heating element and the infrared transmission component. The motor is connected to the fan blades through the holes of the riveted sleeve.

5. The heating device according to claim 1, wherein: It also includes a cover net, the fan blades are arranged on the cover net and at least maintain rotational freedom, the fan blades are connected to the motor by one of meshing, friction, and magnetism, and the cover net can be arranged on the heating component or on other devices associated with the heating device.

6. The heating device according to claim 1, characterized in that: It also includes a heat dissipation blade, which is arranged on the shaft of the motor and located between the motor body and the heat insulation member.

7. A cooking appliance, characterized in that: The invention comprises a heating device according to any one of claims 1 to 6.

8. A cooking appliance according to claim 7, characterized in that, Also includes: Covers, electrical housings, control units, power connections; The control unit, the heating device and the power supply connection member are arranged in the electrical housing; The cover plate is connected to the electrical housing.

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