Electric ceramic stove

Abstract

The embodiment of the application provides an electric ceramic stove. The electric ceramic stove comprises a panel, a heating disc, a shielding part and a controller. The heating disc is located below the panel. The heating disc comprises a heating wire and a temperature measuring probe. The temperature measuring probe is arranged at the middle part of the heating disc. The shielding part is arranged at the periphery of the temperature measuring probe. A non-contact interval is formed between the top of the shielding part and the lower part of the panel. The shielding part is used for isolating the heat radiation of the heating wire to the temperature measuring probe. The controller is used for performing multi-stage temperature protection operation according to the current temperature collected by the temperature measuring probe, so that the accuracy of temperature control is improved.

Description

Technical Field

[0001] This application relates to the field of electrical appliances, and more particularly to an electric ceramic stove. Background Technology

[0002] Ceramic cooktops are widely used in home cooking, laboratory heating, medical equipment sterilization, and industrial heating. The core function of a ceramic cooktop is to heat the panel using heating elements and regulate the heating power through a temperature controller to maintain the target temperature.

[0003] In related ceramic cooktops, the temperature sensing component is significantly affected by the heating wire temperature, causing its measured temperature value to deviate from the actual panel temperature, thus triggering incorrect power adjustment logic. For example, under dry-burning conditions, the panel temperature may rapidly rise to a dangerous threshold after the temperature sensing component misjudges the reading, posing a safety hazard.

[0004] When the heating power of the electric ceramic cooker is high, the surface temperature of the panel is prone to drastic fluctuations due to heat radiation and power fluctuations, resulting in low accuracy of temperature control. Summary of the Invention

[0005] This application provides an electric ceramic stove to improve the accuracy of temperature control.

[0006] In a first aspect, embodiments of this application provide an electric ceramic stove, including a panel, a heating plate, a shielding part, and a controller;

[0007] The heating plate is located below the panel. The heating plate includes a heating wire and a temperature probe, with the temperature probe positioned in the middle of the heating plate.

[0008] The shielding part is set around the temperature probe, and a non-contact gap is formed between the top of the shielding part and the bottom of the panel;

[0009] The shielding part is used to isolate the heating wire from the heat radiation of the temperature measuring probe;

[0010] The controller is used to perform multi-stage temperature protection operations based on the current temperature collected by the temperature probe.

[0011] In this way, the shielding design reduces the interference of heating wire heat radiation on the thermocouple through physical isolation, making the temperature measurement more accurately reflect the panel temperature. The multi-segment temperature protection logic dynamically adjusts the power output according to the current temperature, improving the accuracy of temperature control.

[0012] In one possible implementation, the shielding part forms a ring structure around the temperature probe, the inner wall of the ring structure is parallel to the outer wall of the temperature probe, and the shielding part is made of heat insulation material.

[0013] In this way, the parallel spacing design between the inner wall of the annular structure and the outer wall of the temperature probe ensures uniform circumferential isolation, avoids radiation penetration caused by excessive local gaps, and prevents heat conduction interference caused by contact.

[0014] In one possible implementation, the distance between the top of the temperature probe and the top of the shield is in the range of -3mm to 3mm.

[0015] This distance range ensures effective isolation of thermal radiation and efficient response of panel thermal conduction, thereby improving the accuracy of temperature control.

[0016] In one possible implementation, the distance between the top of the temperature probe and the top of the shield is 1 mm.

[0017] In this way, the distance design can effectively isolate the heat radiation of the heating wire while enabling the temperature probe to accurately receive the heat conduction from the panel, thereby improving the accuracy of temperature measurement to support the stable adjustment of the temperature control system.

[0018] In one possible implementation, a thermal inertia buffer layer is provided between the shielding part and the temperature probe to smooth the temperature response curve corresponding to the temperature probe.

[0019] In this way, by smoothing the temperature response curve through the thermal inertia buffer layer, temperature fluctuations can be reduced to improve temperature control accuracy, avoid frequent power adjustments, and make the panel temperature more stable, thereby improving the precision of temperature control.

[0020] In one possible implementation, the multi-stage temperature protection operation includes:

[0021] Multiple preset temperature ranges are obtained, and each preset temperature range corresponds to a different power limit.

[0022] Determine the target temperature range based on the current temperature and multiple preset temperature ranges;

[0023] Determine the target power limit based on the target temperature range;

[0024] The temperature of the electric ceramic furnace is controlled according to the target power limit.

[0025] In this way, by precisely matching multiple preset temperature ranges with corresponding power limits, the heating power can be gradually adjusted, avoiding drastic temperature fluctuations caused by traditional step temperature control. This allows for rapid response to abnormal operating conditions such as dry burning, thereby improving the accuracy of temperature control.

[0026] In one possible implementation, the controller is also used to set multiple preset temperature points and determine multiple preset temperature ranges based on the multiple preset temperature points.

[0027] In this way, by setting multiple preset temperature points to divide multiple preset temperature ranges, the temperature range can be precisely and flexibly divided, providing a precise basis for the gradual adjustment of power, thereby improving the accuracy of temperature control.

[0028] In one possible implementation, the temperature difference between adjacent temperature points increases sequentially, and the limiting power corresponding to adjacent preset temperature ranges decreases sequentially.

[0029] In this way, through the coordinated design of successively increasing adjacent temperature differences and successively decreasing corresponding limiting power, temperature stability and temperature control accuracy are guaranteed, and the protection response is strengthened when approaching the safety threshold, thereby improving the accuracy of temperature control.

[0030] In one possible implementation, the multiple preset temperature ranges include a first temperature range, a second temperature range, a third temperature range, and a fourth temperature range. The first temperature range corresponds to a first limiting power, the second temperature range corresponds to a second limiting power, the third temperature range corresponds to a third limiting power, and the fourth temperature range corresponds to a fourth limiting power. The first limiting power, the second limiting power, the third limiting power, and the fourth limiting power decrease sequentially.

[0031] In this way, by precisely matching the four preset temperature ranges with the progressively decreasing power limits, the heating power can be finely and gradually adjusted, thereby improving the accuracy of temperature control.

[0032] In one possible implementation, the first temperature range is [0℃, 400℃), the second temperature range is [400℃, 420℃), the third temperature range is [420℃, 450℃), the fourth temperature range is [450℃, +∞), the first power limit is 2200W, the second power limit is 1600W, the third power limit is 1000W, and the fourth power limit is 0W.

[0033] In this way, by precisely matching the four preset temperature ranges with the progressively decreasing power limits, the heating power can be finely and gradually adjusted, thereby improving the accuracy of temperature control.

[0034] This application provides an electric ceramic cooktop that features a shield around the temperature probe in the center of the heating element. A non-contact gap is formed between the top of the shield and the bottom of the panel. A controller performs multi-stage temperature protection operations based on the current temperature. This shield design reduces interference from the heating wire's heat radiation to the thermocouple through physical isolation, resulting in a more accurate reflection of the panel temperature. The multi-stage temperature protection logic dynamically adjusts the power output based on the current temperature, improving the accuracy of temperature control. Attached Figure Description

[0035] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0036] Figure 1 This is a schematic diagram of the structure of an electric ceramic stove provided in an embodiment of this application;

[0037] Figure 2 This is a schematic diagram of the structure of a heating plate provided in an embodiment of this application;

[0038] Figure 3 A partial structural diagram of a heating plate provided in an embodiment of this application;

[0039] Figure 4 A schematic diagram of the cross-sectional structure of a shielding part and a temperature measuring probe provided for an embodiment of this application;

[0040] Figure 5 This is a schematic diagram of another electric ceramic stove provided in an embodiment of this application.

[0041] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0042] First, those skilled in the art should understand that these embodiments are merely for explaining the technical principles of this application and are not intended to limit the scope of protection of this application. Those skilled in the art can make adjustments as needed to adapt to specific application scenarios.

[0043] Secondly, it should be noted that, in the description of this application, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, an indirect connection through an intermediate medium, or the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0044] Furthermore, it should be noted that in the description of this application, the terms "upper," "lower," "front," "back," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0045] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0046] Ceramic cooktops are widely used in home cooking, laboratory heating, medical equipment sterilization, and industrial heating. The core function of a ceramic cooktop is to heat the panel using heating elements and regulate the heating power through a temperature controller to maintain the target temperature.

[0047] In related ceramic cooktops, the temperature sensing component is significantly affected by the heating wire temperature, causing its measured temperature value to deviate from the actual panel temperature, thus triggering incorrect power adjustment logic. For example, under dry-burning conditions, the panel temperature may rapidly rise to a dangerous threshold after the temperature sensing component misjudges the reading, posing a safety hazard.

[0048] When the heating power of the electric ceramic cooker is high, the surface temperature of the panel is prone to drastic fluctuations due to heat radiation and power fluctuations, resulting in low accuracy of temperature control.

[0049] To address the aforementioned issues, this application provides an electric ceramic cooktop. A shield is positioned around the temperature probe in the center of the heating element, creating a non-contact gap between the top of the shield and the bottom of the panel. A controller then executes multi-stage temperature protection operations based on the current temperature. This shield design reduces interference from the heating wire's thermal radiation to the thermocouple through physical isolation, resulting in a more accurate reflection of the panel temperature. The multi-stage temperature protection logic dynamically adjusts the power output based on the current temperature, improving the accuracy of temperature control.

[0050] The technical solution of this application and how the technical solution of this application solves the above-mentioned technical problems are described in detail below with specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The embodiments of this application will now be described with reference to the accompanying drawings.

[0051] Figure 1 This is a schematic diagram of the structure of an electric ceramic stove provided in an embodiment of this application. Figure 1 As shown, Figure 1 This includes an electric ceramic cooktop. An electric ceramic cooktop may include a control panel, heating element, shield, and controller.

[0052] The heating plate is located below the panel. The heating plate includes a heating wire and a temperature probe, with the temperature probe positioned in the middle of the heating plate.

[0053] The shielding part is set around the temperature probe, and a non-contact gap is formed between the top of the shielding part and the bottom of the panel;

[0054] The shielding part is used to isolate the heating wire from the heat radiation of the temperature measuring probe;

[0055] The controller is used to perform multi-stage temperature protection operations based on the current temperature collected by the temperature probe in the heating plate.

[0056] The panel can be the appliance-supporting surface of the electric ceramic stove, which is the part that directly contacts the appliance.

[0057] The panel can be used to evenly transfer the heat generated by the heating structure to the appliance, and it also has the characteristics of high temperature resistance, wear resistance and easy cleaning.

[0058] The panel can be made of high-strength, high-temperature resistant ceramic, which can withstand temperatures above 500℃ and has good thermal conductivity, ensuring that the appliance is heated evenly.

[0059] The heating plate can generate heat by passing electricity through the heating wire, and the structural design enables the effective conduction of heat to the panel.

[0060] Optionally, the heating plate may include an insulated base, a tray, a heating plate support, heating wires, and a temperature probe.

[0061] Below, in conjunction with Figure 2 The heating plate will be further explained.

[0062] Figure 2 This is a schematic diagram of a heating plate provided in an embodiment of this application. Figure 2 As shown, Figure 2 It includes a heating plate, which consists of an insulated base, a tray, a heating plate support, heating wires, and a temperature probe.

[0063] The heat-insulating base can be located at the bottom of the heating plate. It is a heat insulation layer between the heating plate and the inside of the electric ceramic cooker. It can be a sheet or a disc structure, with a size that matches the tray, and completely covers the area below the heating plate.

[0064] The heat-insulating base can prevent the heat generated by the heating wire from being transferred to the lower part of the ceramic cooktop, avoiding damage to the circuit module below due to high temperature aging. It confines the heat to the conduction path between the heating plate and the panel, improving energy utilization efficiency.

[0065] The tray can be located above the heat insulation base and inside the heating plate support. It is the basic carrier that supports the heating wire. It is usually a disc-shaped structure made of metal, with grooves or buckles on the surface for fixing the heating wire.

[0066] The tray can use surface grooves or clips to fix the heating wire along a preset trajectory, such as a spiral or ring, to ensure that the heating wire is evenly distributed and to prevent the heating wire from shifting and causing localized overheating.

[0067] The heating plate support can surround the outer perimeter of the tray or be distributed at the bottom of the tray. It is a positioning component that connects the heating plate to the body of the electric ceramic cooker, and is usually a frame or column structure.

[0068] The heating plate bracket can fix the vertical distance between the heating plate and the panel, ensuring that the heat generated by the heating wire can be efficiently transferred to the panel, while avoiding direct contact between the heating plate and the panel, which could cause localized overheating of the panel.

[0069] Heating wires can be embedded or wound in grooves on the surface of the tray. They are the core heat-generating element of the heating plate and are usually spiral or wavy, covering most of the tray area.

[0070] The temperature probe can be fixed in the center of the tray by a bracket, with the top of the probe close to the panel. It is usually a thermocouple or thermistor, which can convert the temperature signal into an electrical signal and feed it back to the temperature control circuit.

[0071] The temperature probe, protected by a shield, receives only the heat transferred from the panel through thermal conduction, avoiding interference from the heating wire's thermal radiation and ensuring that the measured value is close to the actual temperature of the panel.

[0072] Alternatively, the heating plate can operate through the following process:

[0073] 1. After being powered on, the heating wire generates heat under the support of the tray. Most of the heat is conducted through the tray to the upper panel, thereby heating the cookware.

[0074] 2. The heat-insulating bottom blocks heat from being transferred downwards, protecting the internal components of the machine body and reducing heat loss at the same time;

[0075] 3. The heating plate bracket fixes the distance between the heating plate and the panel, ensuring efficient heat conduction and preventing structural displacement;

[0076] 4. The temperature probe collects the temperature in real time in the middle of the heating plate. Because the shielding part isolates the heat radiation of the heating wire, it only receives the heat conducted by the panel and outputs the real temperature signal.

[0077] 5. The temperature control circuit adjusts the heating power based on the signal from the temperature probe.

[0078] Heating wires can generate heat to produce the required heat.

[0079] The heating wire can be made of high-temperature resistant materials such as iron-chromium-aluminum resistance wire, which can quickly generate heat and transfer it to the panel after being powered on.

[0080] Temperature probes can be used as sensing components to detect the temperature of a panel.

[0081] The temperature probe can be a thermocouple or a thermistor.

[0082] The temperature probe can be placed in the middle of the heating plate and facing the panel. It can convert the temperature signal into an electrical signal and feed it back to the controller to realize closed-loop regulation of the heating power.

[0083] Optionally, the distance between the top of the temperature probe and the top of the shield is in the range of -3mm to 3mm.

[0084] Below, in conjunction with Figure 3 The distance between the temperature probe and the shielding part is explained.

[0085] Figure 3 This is a partial structural diagram of a heating plate provided in an embodiment of this application. Figure 3 As shown, Figure 3 It includes a shield and a temperature probe. The distance between the top of the temperature probe and the top of the shield is d, which can be between [-3mm, 3mm].

[0086] In this way, the distance design between the temperature probe and the shield balances thermal isolation and thermal response speed, thereby improving the reliability of the temperature measurement signal.

[0087] Optionally, the distance between the top of the temperature probe and the top of the shield is 1 mm.

[0088] In this way, the temperature probe is surrounded by a shield and conducts heat to the panel only through a 1mm gap, thereby reducing the interference of heat radiation from the heating wire.

[0089] Optionally, a thermal inertia buffer layer is provided between the shield and the temperature probe to smooth the temperature response curve corresponding to the temperature probe.

[0090] Thermal inertia buffer layer can refer to a material layer with high specific heat capacity, used to smooth temperature changes.

[0091] The thermal inertia buffer layer can be a paraffin-based phase change material or a graphene composite material.

[0092] The thermal inertia buffer layer slows down the rate of temperature change of the temperature probe after power adjustment by absorbing and releasing heat. For example, when the power is reduced, the buffer layer absorbs the residual heat of the temperature probe and releases it slowly, making its temperature change smoother.

[0093] In this way, the thermal inertia buffer layer reduces the temperature drop of the temperature probe caused by the sudden drop in power, avoids the false triggering of additional power adjustment, and thus improves the accuracy of temperature control.

[0094] The shielding part can be used to isolate the heating wire from the direct heat radiation of the temperature probe, while slowing down the heat dissipation rate of the temperature probe.

[0095] Thermal radiation can refer to the transfer of heat to the surroundings in the form of electromagnetic waves after a heating wire is energized and generates heat.

[0096] Because the shielding part surrounds the temperature probe, its physical structure blocks the heat radiated directly from the heating wire to the probe, cutting off the heat radiation path. The temperature probe receives the heat transferred through the panel's heat conduction, which directly reflects the panel's actual temperature, avoiding temperature measurement deviations caused by transient heat radiation from the heating wire. The temperature probe feeds back the collected real temperature signal to the controller, which can adjust the power based on accurate data to ensure stable panel temperature and respond quickly under abnormal conditions, avoiding the risk of overheating.

[0097] Non-contact interval refers to the distance between the top of the shield and the bottom of the panel where there is no physical contact. Its design purpose is to allow some of the heat generated by the heating wire to radiate to the panel above the temperature probe, so that the temperature measured by the temperature probe is closer to the actual temperature of the panel. If the shield directly touches the bottom surface of the panel, the temperature probe will not be affected by the heating wire at all. The part of the panel above the temperature probe, that is, the part of the panel surrounded by the shield, will also not receive the heat radiation from the heating wire. Compared with other parts of the panel, this part of the panel is made of microcrystalline glass, which has slower lateral heat conduction, resulting in a lower temperature.

[0098] In one possible implementation, combining Figure 4 The obstructed parts will be explained.

[0099] Figure 4 This is a schematic cross-sectional view of a shielding part and a temperature measuring probe provided in an embodiment of this application. Figure 4 As shown, Figure 4 This includes the shielding part and the temperature probe.

[0100] The shielding part forms a ring structure around the temperature probe, and the inner wall of the ring structure is parallel to the outer wall of the temperature probe. The shielding part is made of heat insulation material.

[0101] When the heating plate is working, the heating wire inside the heating plate is energized to generate heat. Part of the heat is conducted through the tray to the ceramic panel above, which is used to heat the appliance; the other part of the heat is diffused to the surroundings in the form of infrared radiation, which acts on the temperature probe located in the middle of the heating plate.

[0102] The ring structure surrounding the temperature probe blocks the direct thermal radiation from the heating wire, cutting off the main path for radiant heat to reach the probe.

[0103] The parallel spacing between the inner wall of the annular structure and the outer wall of the temperature probe ensures uniform circumferential isolation, avoids radiation penetration caused by excessive local gaps, and prevents heat conduction interference caused by contact.

[0104] The shielding part made of heat insulation material does not absorb or conduct the radiant heat of the heating wire, thus preventing the shielding part from becoming a secondary heat source due to heat rise, and further ensuring that the temperature probe is not affected by indirect heat.

[0105] Under the protection of the shield, the temperature probe can receive the heat transferred by the panel through thermal conduction, collect the current temperature of the panel, and convert the temperature signal into an electrical signal to be transmitted to the controller.

[0106] The controller can receive temperature signals and determine the current temperature based on the temperature signals, and then perform multi-stage temperature protection operations based on the current temperature.

[0107] Optionally, multi-stage temperature protection operation includes:

[0108] Multiple preset temperature ranges are obtained, and each preset temperature range corresponds to a different power limit.

[0109] Determine the target temperature range based on the current temperature and multiple preset temperature ranges;

[0110] Determine the target power limit based on the target temperature range;

[0111] The temperature of the electric ceramic furnace is controlled according to the target power limit.

[0112] The power limit can be preset.

[0113] There is a first preset relationship between the preset temperature range and the power limit.

[0114] The first preset relationship may include multiple preset temperature ranges and the power limit corresponding to each preset temperature range.

[0115] The target power limit can be determined based on the target temperature range and the first preset relationship.

[0116] Optionally, the controller is also used to set multiple preset temperature points and determine multiple preset temperature ranges based on the multiple preset temperature points.

[0117] For example, three preset temperature points T1, T2, and T3 can be set. Based on T1, T2, and T3, four preset temperature ranges can be determined: [0, T1), [T1, T2), [T2, T3), [T3, +∞).

[0118] Optionally, the temperature difference between adjacent temperature points increases sequentially, and the limiting power corresponding to adjacent preset temperature ranges decreases sequentially.

[0119] Optionally, the multiple preset temperature ranges include a first temperature range, a second temperature range, a third temperature range, and a fourth temperature range. The first temperature range corresponds to a first limited power, the second temperature range corresponds to a second limited power, the third temperature range corresponds to a third limited power, and the fourth temperature range corresponds to a fourth limited power. The first limited power, the second limited power, the third limited power, and the fourth limited power decrease sequentially.

[0120] For example, T1=400℃, T2=420℃, T3=450℃, T2-T1=20℃≤T3-T2=30℃.

[0121] Setting the preset temperature range of the first segment to be less than or equal to the preset temperature range of the second segment can quickly protect against dry burning conditions.

[0122] The power limit for [0, T1) is 2200W, and the power limit for [T1, T2) is 1600W.

[0123] The power limit for [T2,T3) is 1000W, and the power limit for [T3,+∞) is 0W.

[0124] When the temperature reaches T1, the power drops to 1600W. This 1600W power is equivalent to the power dissipation of the ceramic cooktop during operation. This means that after dropping to 1600W, the ceramic cooktop will only heat up or cool down slowly (the specific heating or cooling depends on the object being heated; if it's a poorly fitted pot, or not in boiling water mode, the power dissipation is lower, and the ceramic cooktop will heat up slowly; if it's a well-fitting iron pot boiling water, the water absorbs heat quickly, so it will cool down slowly). Therefore, the temperature of the ceramic cooktop panel remains relatively stable, with fluctuations generally less than 50℃. However, when dry-burning or empty, the power dissipation is lower, and the temperature will continue to rise at 1600W, quickly reaching T2 and entering the 1000W low-power dry-burning protection mode.

[0125] Optionally, the first temperature range is [0, 400), the second temperature range is [400, 420), the third temperature range is [420, 450), the fourth temperature range is [450, +∞), the first power limit is 2200W, the second power limit is 1600W, the third power limit is 1000W, and the fourth power limit is 0W.

[0126] In this way, by physically isolating the heat radiation path of the heating wire and retaining only the heat conduction path between the thermocouple and the panel, the physical isolation of the shield also reduces the thermal inertia of the temperature probe, making it more sensitive to temperature changes. The non-contact gap between the shield and the panel avoids direct radiant heating of the heating wire while allowing the temperature probe to obtain temperature signals through the heat conduction of the panel, thereby reducing temperature measurement errors and solving the problem of interference from the heating wire on the temperature probe. This makes the temperature measurement signal closer to the actual temperature of the panel, providing a precise basis for subsequent power adjustment. The multi-segment temperature protection logic dynamically adjusts the power output according to the current temperature, improving the accuracy of temperature control.

[0127] Below, in conjunction with Figure 5 The structure of the electric ceramic stove is explained in detail.

[0128] Figure 5 An exploded view of another electric ceramic stove provided as an embodiment of this application. Figure 5 As shown, the electric ceramic cooktop includes a bottom cover, spring, middle frame, fan, knob, controller, light panel, heating plate, and panel.

[0129] The bottom cover can be the outer shell of the ceramic cooktop, serving to protect internal components (such as the controller and fan), prevent dust accumulation, and provide support. The bottom cover usually also has ventilation holes for fan cooling.

[0130] Springs can be used for structural cushioning or contact elastic support in electric ceramic cooktops. For example, in the connection between the heating structure and the panel, they may play a role in maintaining appropriate contact pressure, buffering thermal expansion and contraction, and ensuring stable heat conduction efficiency between the heating structure and the panel.

[0131] The spring can be made of high-temperature resistant spring steel, which can maintain its elasticity and strength in high-temperature environments.

[0132] The middle frame serves as a structural support component for the ceramic cooker, connecting the control panel, heating element, and bottom cover to form a stable overall structure. Simultaneously, the space inside the middle frame can be used to house components such as wiring and fans.

[0133] The middle frame can be made of high-temperature resistant plastic or metal, possessing a certain degree of strength and heat resistance.

[0134] A fan can be a heat dissipation component of an electric ceramic stove, used to dissipate heat generated by the heating structure, controller, and other components in a timely manner to prevent the equipment from being damaged due to overheating.

[0135] A fan can consist of fan blades, a motor, and a bracket, and is usually installed near the ventilation opening of an electric ceramic stove to create air convection.

[0136] The knob is a user-operated component used to adjust the heating power or temperature setting of the ceramic cooktop. By rotating the knob, different heating modes or power outputs can be switched.

[0137] The knob can be made of plastic or metal and has an internal potentiometer or coded switch that converts mechanical rotation into electrical signals that are transmitted to the controller.

[0138] The controller can be referenced from the controller described above, and will not be elaborated upon here.

[0139] The light panel can be used to display the working status of the electric ceramic cooker, such as power indicator, heating level indicator, fault indicator, etc., so that users can intuitively understand the operation of the equipment.

[0140] A light panel can consist of multiple LEDs and a circuit board. It is usually connected to a controller to receive control signals and light up the corresponding indicator lights.

[0141] The heating plate can be referenced from the heating plate described above, and will not be repeated here.

[0142] The panel can be the appliance-supporting surface of an electric ceramic stove, and it is the part that directly contacts the appliance.

[0143] The panel can be used to evenly transfer the heat generated by the heating plate to the appliance, and it also has the characteristics of high temperature resistance, wear resistance and easy cleaning.

[0144] The panel can be made of high-strength, high-temperature resistant ceramic, which can withstand temperatures above 500℃ and has good thermal conductivity, ensuring that the appliance is heated evenly.

[0145] In this way, the electric ceramic stove, through the shielding part and non-contact interval design in the heating plate, enables the temperature probe to more accurately sense the panel temperature, and dynamically adjusts the power output through the multi-segment temperature protection logic of the control module, thereby improving the accuracy of temperature control.

[0146] Finally, it should be noted that other embodiments of the invention will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This invention is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein, and is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of the invention is limited only by the appended claims.

Claims

1. An electric ceramic stove, characterized in that, Includes a panel, heating element, shielding part, and controller; The heating plate is located below the panel, and the heating plate includes a heating wire and a temperature probe, with the temperature probe disposed in the middle of the heating plate; The shielding part is disposed around the temperature probe, and a non-contact gap is formed between the top of the shielding part and the bottom of the panel; The shielding part is used to isolate the heating wire from the thermal radiation of the temperature measuring probe; The controller is used to perform multi-stage temperature protection operations based on the current temperature collected by the temperature probe.

2. The electric ceramic stove according to claim 1, characterized in that, The shielding part forms a ring structure around the temperature probe, the inner wall of the ring structure is parallel to the outer wall of the temperature probe, and the shielding part is made of heat insulation material.

3. The electric ceramic stove according to claim 2, characterized in that, The distance between the top of the temperature probe and the top of the shield is [-3mm, 3mm].

4. The electric ceramic stove according to claim 2, characterized in that, The distance between the top of the temperature probe and the top of the shield is 1 mm.

5. The electric ceramic stove according to any one of claims 1-4, characterized in that, A thermal inertia buffer layer is provided between the shielding part and the temperature probe to smooth the temperature response curve corresponding to the temperature probe.

6. The electric ceramic stove according to any one of claims 1-4, characterized in that, The multi-stage temperature protection operation includes: Multiple preset temperature ranges are obtained, and the multiple preset temperature ranges correspond to different power limits; Determine the target temperature range based on the current temperature and the multiple preset temperature ranges; Determine the target power limit based on the target temperature range; The temperature of the electric ceramic furnace is controlled according to the target power limit.

7. The electric ceramic stove according to any one of claims 1-4, characterized in that, The controller is also used to set multiple preset temperature points and determine multiple preset temperature ranges based on the multiple preset temperature points.

8. The electric ceramic stove according to claim 7, characterized in that, The temperature difference between adjacent temperature points increases sequentially, while the power limit corresponding to adjacent preset temperature ranges decreases sequentially.

9. The electric ceramic stove according to claim 6, characterized in that, The plurality of preset temperature ranges include a first temperature range, a second temperature range, a third temperature range, and a fourth temperature range. The first temperature range corresponds to a first limiting power, the second temperature range corresponds to a second limiting power, the third temperature range corresponds to a third limiting power, and the fourth temperature range corresponds to a fourth limiting power. The first limiting power, the second limiting power, the third limiting power, and the fourth limiting power decrease sequentially.

10. The electric ceramic stove according to claim 9, characterized in that, The first temperature range is [0℃, 400℃), the second temperature range is [400℃, 420℃), the third temperature range is [420℃, 450℃), the fourth temperature range is [450℃, +∞), the first power limit is 2200W, the second power limit is 1600W, the third power limit is 1000W, and the fourth power limit is 0W.

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