Dry boil detection method, apparatus and hob for a hob

Abstract

The application relates to a dry burning detection method and device of a cooking appliance and the cooking appliance. The cooking appliance comprises a control unit and a thermoelectric power generation unit connected to the control unit; the thermoelectric power generation unit is arranged on the cooking appliance and close to a region with temperature rise where a pot is placed; the method comprises the following steps: acquiring a reference voltage of the thermoelectric power generation unit under a maximum fire power gear and an actual power generation voltage at present; when the actual power generation voltage of the thermoelectric power generation unit exceeds the reference voltage under the maximum fire power gear within a preset interval time, it is judged that the cooking appliance is in a dry burning state. Therefore, the thermoelectric power generation unit is adopted to realize self-power generation, meanwhile, an additional dry burning prevention detection component can be omitted, the self-power generation performance is fully utilized, the manufacturing cost is saved, the cost reduction is facilitated, the dry burning detection requirement of part of the cooking appliances can be met, and different implementation manners of the dry burning detection of the cooking appliance are provided.

Description

Technical Field

[0001] This application relates to the field of smart home appliance technology, and in particular to a method, device and stove for detecting dry burning. Background Technology

[0002] With the development of smart home appliance technology, various methods to prevent dry burning have emerged on the market. The most common method is to use a temperature sensor probe on the burner head to detect the temperature. Existing temperature sensor probes use NTC (Negative Temperature Coefficient) thermistor material installed in the head of the temperature sensor probe to measure the temperature.

[0003] However, existing methods for preventing dry burning have issues such as increased manufacturing costs for stoves that use combustion to heat the glass panel and use thermoelectric generators to generate electricity. Summary of the Invention

[0004] Therefore, it is necessary to provide a method, device, and stove for dry burning detection that can reduce manufacturing costs, in response to the above-mentioned technical problems.

[0005] In a first aspect, this application provides a method for detecting dry burning in a cooktop. The cooktop includes a control unit and a thermoelectric generator connected to the control unit; the method includes:

[0006] Obtain the reference voltage of the thermoelectric generator unit at its maximum power level, as well as the current actual power generation voltage; the reference voltage is the maximum power generation voltage of the thermoelectric generator unit at the corresponding power level under normal conditions.

[0007] Within a preset interval, determine whether the actual generated voltage exceeds the reference voltage at the maximum power level;

[0008] If so, the stove is determined to be in a dry-burning state.

[0009] In one embodiment, after determining whether the actual generated voltage exceeds the reference voltage at the maximum power level within a preset interval, the process further includes:

[0010] If not, the stove is determined to be in normal combustion condition.

[0011] In one embodiment, before determining whether the actual generated voltage exceeds the reference voltage at the maximum power level within a preset interval, the method further includes:

[0012] Obtain the reference voltage of the thermoelectric generator unit under different power levels;

[0013] Determine the current actual firepower level and the corresponding reference voltage;

[0014] If the actual generated voltage is greater than the reference voltage corresponding to the actual power level, then it is determined whether the actual generated voltage exceeds the reference voltage under the maximum power level within a preset interval.

[0015] In one embodiment, determining the current actual firepower level includes:

[0016] Obtain the comparison results between the actual generated voltage and the reference voltage of each power generation level. ， If the comparison results meet the conditions for obtaining the gear level, the actual firepower level is determined.

[0017] The conditions for obtaining the gear position include: the actual power generation voltage is greater than the reference voltage corresponding to the adjacent gear position of the actual power generation voltage, and the actual power generation voltage is less than or equal to the reference voltage corresponding to the actual power generation voltage.

[0018] In one embodiment, a reference value corresponding to each power level of the thermoelectric generator is obtained under ideal room temperature conditions, and a compensation value is obtained; the compensation value is used to compensate for the error of the thermoelectric generator itself and the error of the environment; the maximum power generation voltage under each power level is the sum of the compensation value and the reference value corresponding to each power level.

[0019] In one embodiment, the location of the thermoelectric generator unit meets the measurement conditions; the measurement conditions include: when the thermoelectric generator unit is at the lowest power setting and the stove is in a dry-burning state, the actual generated voltage exceeds the reference voltage at the highest power setting.

[0020] In one embodiment, the current actual firepower level and the reference voltage corresponding to the actual firepower level are determined, and then the method further includes:

[0021] If the actual generated voltage is less than or equal to the reference voltage corresponding to the actual firepower level, the stove is determined to be in normal combustion state.

[0022] Secondly, this application also provides a dry-burning detection device for a cooktop. The cooktop includes a control unit and a thermoelectric generator connected to the control unit; the thermoelectric generator is disposed on the cooktop near the area where the pot is placed and where there is a temperature rise; the device includes:

[0023] The parameter determination module is used to obtain the reference voltage of the thermoelectric generator unit at the maximum power level, as well as the current actual power generation voltage; the reference voltage is the maximum power generation voltage of the thermoelectric generator unit at the corresponding power level under normal conditions.

[0024] The comparison module is used to determine whether the actual generated voltage exceeds the reference voltage at the maximum power level within a preset interval.

[0025] The determination module is used to determine if the stove is in a dry-burning state.

[0026] Thirdly, this application also provides a cooktop. The cooktop includes a control unit and a thermoelectric generator unit connected in sequence; the thermoelectric generator unit is disposed on the cooktop near the area where the pot is placed and where there is a temperature rise; the cooktop is used to perform the dry-burning detection method described above.

[0027] In one embodiment, the thermoelectric power generation unit includes a thermoelectric generator; the thermoelectric generator is used to convert heat energy transferred from a region with a temperature rise into electrical energy.

[0028] The aforementioned dry-burning detection method, device, and stove include a control unit and a thermoelectric generator unit interconnected on the stove. The thermoelectric generator unit is located on the stove near the area where the pot is placed and where there is a temperature rise. It utilizes the characteristic that the high temperature generated by the pot during dry burning affects the thermal balance of the thermoelectric generator unit, increasing its output voltage, to detect dry burning. If the actual generated voltage of the thermoelectric generator unit exceeds the reference voltage at the maximum power setting within a preset interval, the stove is determined to be in a dry-burning state. Therefore, this application achieves self-generation using a thermoelectric generator unit, eliminating the need for additional anti-dry-burning detection components. It fully utilizes self-generation performance while helping to save manufacturing costs, contributing to cost reduction. It can meet the dry-burning detection needs of some stoves and provides different implementation methods for dry-burning detection of stoves. Attached Figure Description

[0029] Figure 1 A diagram of a stove used in an embodiment of the dry-burning detection method;

[0030] Figure 2 This is a flowchart illustrating a method for detecting dry burning of a stove in one embodiment;

[0031] Figure 3 This is a flowchart illustrating the process of determining the working state of a stove in one embodiment;

[0032] Figure 4 This is a flowchart illustrating the process of determining the working state of the stove in another embodiment;

[0033] Figure 5 This is a structural block diagram of a dry-burning detection device for a stove in one embodiment. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0035] The anti-dry-burning detection method provided in this application embodiment can be applied to, for example... Figure 1 In the stove shown, the thermoelectric generator unit 110 is connected to the control unit 120, which can control the gas valve and alarm system of the stove.

[0036] Specifically, Figure 1 The stove shown is designed to generate electricity through a thermoelectric generator when the stove panel heats up during combustion. The temperature difference within the stove and the characteristics of the thermoelectric generator can be used to detect and determine if dry burning has occurred. The thermoelectric generator consists of a cold side and a hot side. The cold side is the side furthest from the heating element, while the hot side is the side closest to it. Specifically, as the stove burns, the temperature difference between the hot and cold sides of the thermoelectric generator increases, leading to increased power generation and higher output voltage and power. Based on this characteristic, the control unit on the stove uses an AD pin to sample the actual voltage generated by the thermoelectric generator in real time. The control unit includes an MCU (Microcontroller Unit) and a CPU (Central Processing Unit). To improve the accuracy and precision of the sampling for a more accurate and faster response, different reference information for different firepower levels is determined. Considering environmental factors and the rapid temperature changes associated with dry burning, the following dry-burning prevention detection method is used.

[0037] In one embodiment, such as Figure 2 As shown, a method for detecting dry burning in a stove is provided, which is then applied to... Figure 1 Taking a stove as an example, the method includes:

[0038] S202, obtain the reference voltage of the thermoelectric generator unit at the maximum power level, and the current actual power generation voltage; the reference voltage is the maximum power generation voltage of the thermoelectric generator unit at the corresponding power level under normal conditions.

[0039] Specifically, the thermoelectric generator unit can be installed on the stove near the area where the pot is placed, where there is a temperature rise. The stove needs to have different heat levels. If it is a stepless heat control system, the heat levels can be manually set according to the actual situation. The finer the heat levels, the higher the accuracy of judging dry burning and the faster the response speed. The maximum power generation voltage (reference voltage) of the thermoelectric generator unit at the maximum heat level and the current actual power generation voltage of the thermoelectric generator unit should be obtained.

[0040] In one embodiment, a reference value corresponding to each power level of the thermoelectric generator is obtained under ideal room temperature conditions, and a compensation value is obtained; the compensation value is used to compensate for the error of the thermoelectric generator itself and the error of the environment; the maximum power generation voltage under each power level is the sum of the compensation value and the reference value corresponding to each power level.

[0041] Specifically, under ideal room temperature conditions, water is added to an iron pot on a stove at different heat levels and heated until it boils. This continues until the temperature difference between the hot and cold sides of the thermoelectric generator is roughly balanced, and the generator voltage stabilizes. This voltage is the baseline value for each heat level. Furthermore, because the thermoelectric generator itself has measurement errors, and the surrounding environment and cookware also play a role, a compensation value is manually set to prevent misjudgments. These measurement errors have a significant impact in the early and middle stages of measuring the actual generator voltage. However, once the generator voltage is relatively stable, the impact of these errors on the actual generator voltage can be ignored, and the compensation value can be set relatively small. The maximum generator voltage at each heat level is the sum of the compensation value and the corresponding baseline value for that heat level.

[0042] S204 determines whether the actual generated voltage exceeds the reference voltage at the maximum power level within a preset interval.

[0043] Specifically, within a preset interval, the actual generated voltage of the thermoelectric power generation unit is obtained and compared with the reference voltage at the maximum power level.

[0044] In one embodiment, before determining whether the actual generated voltage exceeds the reference voltage at the maximum power level within a preset interval, the method further includes:

[0045] Obtain the reference voltage of the thermoelectric generator unit under different power levels;

[0046] Determine the current actual firepower level and the corresponding reference voltage;

[0047] If the actual generated voltage is greater than the reference voltage corresponding to the actual power level, then it is determined whether the actual generated voltage exceeds the reference voltage under the maximum power level within a preset interval.

[0048] Specifically, based on the compensation value and the reference value corresponding to each firepower level, the reference voltage of the thermoelectric generator at different firepower levels is obtained. Based on the current actual power generation voltage of the thermoelectric generator, the current actual firepower level of the stove and the reference voltage corresponding to the actual firepower level are determined. If the actual power generation voltage is greater than the reference voltage corresponding to the actual firepower level, the actual power generation voltage is sampled every sampling cycle within a preset interval time, and the actual power generation voltage measured in each sampling cycle is compared with the reference voltage at the maximum firepower level. The preset interval time can be set manually, and the sampling cycle can also be set manually. In this application, the sampling cycle is 10s as an example.

[0049] Furthermore, by determining the actual heat level in this way, the characteristics of the thermoelectric generator unit can be utilized. While determining whether the stove is in a dry-burning state, if there is an adjustment of the heat level, the heat level can also be determined, which facilitates the execution and simplification of the program.

[0050] In one embodiment, determining the current actual firepower level includes:

[0051] Obtain the comparison results between the actual generated voltage and the reference voltage of each power generation level. ， If the comparison results meet the conditions for obtaining the gear level, the actual firepower level is determined.

[0052] The conditions for obtaining the gear position include: the actual power generation voltage is greater than the reference voltage corresponding to the adjacent gear position of the actual power generation voltage, and the actual power generation voltage is less than or equal to the reference voltage corresponding to the actual power generation voltage.

[0053] Specifically, the actual generated voltage is first obtained. For example, when the actual generated voltage is greater than the reference voltage for power level 1 and less than or equal to the reference voltage for power level 2, the current power level is determined to be level 2. This process is repeated to determine the actual power level. Alternatively, the actual power level can be determined by detecting the magnitude of the flame ion current signal. This application uses the comparison between the actual generated voltage and the reference voltage of each power level to illustrate the determination of the actual power level.

[0054] In one embodiment, the current actual firepower level and the reference voltage corresponding to the actual firepower level are determined, and then the method further includes:

[0055] If the actual generated voltage is less than or equal to the reference voltage corresponding to the actual firepower level, the stove is determined to be in normal combustion state.

[0056] Specifically, based on the compensation value and the reference value corresponding to each firepower level, the reference voltage of the thermoelectric generator unit under different firepower levels is obtained. Based on the current actual power generation voltage of the thermoelectric generator unit, the current actual firepower level of the stove and the reference voltage corresponding to the actual firepower level are determined. If the actual power generation voltage is less than or equal to the reference voltage corresponding to the actual firepower level, the stove is determined to be in normal combustion state, and real-time sampling continues.

[0057] S206, if so, then the stove is determined to be in a dry-burning state.

[0058] Specifically, if the actual generated voltage exceeds the reference voltage at the maximum power setting within a preset interval, the stove is determined to be in a dry-burning state.

[0059] In one embodiment, after determining whether the actual generated voltage exceeds the reference voltage at the maximum power level within a preset interval, the process further includes:

[0060] If not, the stove is determined to be in normal combustion condition.

[0061] Specifically, if the actual generated voltage does not exceed the reference voltage at the maximum firepower level within the preset interval, the stove is determined to be in normal combustion mode.

[0062] In one embodiment, the location of the thermoelectric generator unit meets the measurement conditions; the measurement conditions include: when the thermoelectric generator unit is at the lowest power setting and the stove is in a dry-burning state, the actual generated voltage exceeds the reference voltage at the highest power setting.

[0063] Specifically, the thermoelectric generator is positioned such that even when the thermoelectric generator is at its lowest power setting and the stove is in a dry-burning state, the actual power generation voltage of the thermoelectric generator exceeds the reference voltage at the highest power setting. This ensures that dry-burning can be detected in a timely manner regardless of the power setting of the stove.

[0064] Based on the dry-burning detection method of the stove in the above embodiments, such as Figure 3 As shown, the control unit detects the actual generated voltage of the thermoelectric generator unit and compares it with the reference voltage of each power level to determine the power level. If the actual generated voltage is greater than the reference voltage corresponding to the actual power level, it determines whether the actual generated voltage exceeds the reference voltage of the maximum power level within a preset interval, thereby determining whether the stove is in a dry-burning state and performing an anti-dry-burning operation.

[0065] To further explain this application, a specific example is used for illustration, wherein the thermoelectric power generation unit includes thermoelectric generators, in Figure 1In the stove shown, the firepower levels are divided (if it is a stepless fire control, the firepower can be manually adjusted to divide it into several levels according to the actual situation. The more detailed the division, the higher the accuracy of the judgment and the faster the reaction speed to dry burning. Different firepower levels correspond to different reference values ​​U0, for example: level 1 corresponds to U1, level 2 corresponds to U2, and so on). Using an iron pot (iron pots are heat-resistant), water is heated to boiling point at different firepower levels until the temperature difference between the hot and cold sides of the thermoelectric generator is basically balanced and the voltage generated by the thermoelectric generator is basically stable. The reference value U0 of the thermoelectric generator is read during this process, and the reference value of the firepower at different levels can be obtained.

[0066] An error voltage Ux is set as a supplement based on the inherent error of the thermoelectric generator, ambient temperature, and cookware to avoid misjudgment. This error voltage has a certain impact on the early and middle stages of sampling. However, once the generator voltage in the thermoelectric generator remains basically constant, the influence of the thermoelectric generator's inherent error, ambient temperature, and cookware material on the reference value U0 becomes very small and can be ignored. To leave sufficient margin to meet all normal conditions, the indoor extreme temperature can be selected as the reference standard. Therefore, Ux is selected as the maximum generator error of the thermoelectric generator itself as compensation plus a small margin. The reference voltage U (U=U0+Ux) is determined by adding the error value Ux caused by the thermoelectric generator, cookware, and environment to the reference value U0 at different power levels. Here, U0 is the reference value and Ux is the error voltage (compensation value).

[0067] The actual generated voltage Ua of the thermoelectric generator is sampled in real time (sampling and recording every 10 seconds) and compared with the reference voltage of different power levels to determine the current power level. (For example, if 0 < Ua ≤ U1 (the reference voltage for power level 1), the power level is determined to be level 1; if U1 < Ua ≤ U2 (the reference voltage for power level 2), the power level is determined to be level 2, and so on. If Umax (the reference voltage for the set maximum power level) < Ua, the power level is determined to be dry-burning.) The system checks whether the actual generated voltage Ua of the thermoelectric generator is greater than Umax. If Ua ≤ Umax, it indicates normal operation, and sampling continues. If Ua > Umax, it indicates dry burning, and the stove is determined to be in a dry-burning state. Simultaneously, the gas supply is automatically cut off, and an alarm is issued to alert the user, as follows. Figure 4 As shown, normal combustion will not exceed the reference value Umax. If dry burning occurs, the actual generated voltage Ua will definitely be greater than Umax (when dry burning occurs, the temperature of the pot body is transferred to the glass panel, causing the temperature of the glass panel to rise rapidly). There are also requirements for the installation position of the thermoelectric generator. The distance between the thermoelectric generator and the burner head must ensure that the voltage of the lowest dry burning setting is greater than the reference voltage Umax under the maximum power setting.

[0068] It should be understood that although the steps in the flowcharts of the embodiments described above are shown sequentially according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some steps in the flowcharts of the embodiments described above may include multiple steps or multiple stages. These steps or stages are not necessarily completed at the same time, but can be executed at different times. The execution order of these steps or stages is not necessarily sequential, but can be performed alternately or in turn with other steps or at least some of the steps or stages of other steps.

[0069] Based on the same inventive concept, this application also provides a dry-burning detection device for implementing the dry-burning detection method for the stove described above. The solution provided by this device is similar to the solution described in the above method. Therefore, the specific limitations of one or more dry-burning detection device embodiments provided below can be found in the limitations of the dry-burning detection method for stoves described above, and will not be repeated here.

[0070] In one embodiment, such as Figure 5 As shown, a dry-burning detection device for a cooktop is provided. The cooktop includes a control unit and a thermoelectric generator connected to the control unit. The thermoelectric generator is disposed on the cooktop near the area where the pot is placed, where there is a temperature rise. The device includes: a parameter determination module 510, a comparison module 520, and a determination module 530, wherein:

[0071] The parameter determination module 510 is used to obtain the reference voltage of the thermoelectric generator at the maximum power level and the current actual power generation voltage; the reference voltage is the maximum power generation voltage of the thermoelectric generator at the corresponding power level under normal conditions.

[0072] In one embodiment, a reference value corresponding to each power level of the thermoelectric generator is obtained under ideal room temperature conditions, and a compensation value is obtained; the compensation value is used to compensate for the error of the thermoelectric generator itself and the error of the environment; the maximum power generation voltage under each power level includes the compensation value and the reference value corresponding to each power level.

[0073] The comparison module 520 is used to determine whether the actual generated voltage exceeds the reference voltage at the maximum power level within a preset interval.

[0074] In one embodiment, before determining whether the actual generated voltage exceeds the reference voltage at the maximum power level within a preset interval, the method further includes:

[0075] Obtain the reference voltage of the thermoelectric generator unit under different power levels;

[0076] Determine the current actual firepower level and the corresponding reference voltage;

[0077] If the actual generated voltage is greater than the reference voltage corresponding to the actual power level, then it is determined whether the actual generated voltage exceeds the reference voltage under the maximum power level within a preset interval.

[0078] In one embodiment, determining the current actual firepower level includes:

[0079] Obtain the comparison results between the actual generated voltage and the reference voltage of each power generation level. ， If the comparison results meet the conditions for obtaining the gear level, the actual firepower level is determined.

[0080] The conditions for obtaining the gear position include: the actual power generation voltage is greater than the reference voltage corresponding to the adjacent gear position of the actual power generation voltage, and the actual power generation voltage is less than or equal to the reference voltage corresponding to the actual power generation voltage.

[0081] In one embodiment, the current actual firepower level and the reference voltage corresponding to the actual firepower level are determined, and then the method further includes:

[0082] If the actual generated voltage is less than or equal to the reference voltage corresponding to the actual firepower level, the stove is determined to be in normal combustion state.

[0083] The determination module 530 is used to determine if the stove is in a dry-burning state.

[0084] In one embodiment, after determining whether the actual generated voltage exceeds the reference voltage at the maximum power level within a preset interval, the process further includes:

[0085] If not, the stove is determined to be in normal combustion condition.

[0086] In one embodiment, the location of the thermoelectric generator unit meets the measurement conditions; the measurement conditions include: when the thermoelectric generator unit is at the lowest power setting and the stove is in a dry-burning state, the actual generated voltage exceeds the reference voltage at the highest power setting.

[0087] Each module in the aforementioned dry-burn detection device for stoves can be implemented entirely or partially through software, hardware, or a combination thereof. These modules can be embedded in or independent of the processor in a computer device, or stored in the memory of a computer device as software, so that the processor can call and execute the corresponding operations of each module.

[0088] In one embodiment, this application also provides a cooktop. The cooktop includes a control unit and a thermoelectric generator unit connected in sequence; the thermoelectric generator unit is disposed on the cooktop near the area where the pot is placed and where there is a temperature rise; the cooktop is used to perform the dry-burning detection method described above.

[0089] Furthermore, the thermoelectric generator unit can be installed on the stove near the area where the pot is placed, where there is a temperature rise, so that the stove can perform the aforementioned dry-burning detection method.

[0090] In one embodiment, the thermoelectric power generation unit includes a thermoelectric generator; the thermoelectric generator is used to convert heat energy transferred from a region with a temperature rise into electrical energy.

[0091] Specifically, when the pot on the stove is dry-burning, the heat is transferred to the thermoelectric generator, causing the temperature difference of the thermoelectric generator to increase as the temperature rises, and the output voltage also increases accordingly.

[0092] It should be noted that the data involved in this application (including but not limited to data used for analysis, data stored, data displayed, etc.) are all information and data authorized by the user or fully authorized by all parties, and the collection, use and processing of the relevant data must comply with the relevant laws, regulations and standards of the relevant countries and regions.

[0093] Those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium, and when executed, it can include the processes of the embodiments of the above methods. Any references to memory, databases, or other media used in the embodiments provided in this application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM). The databases involved in the embodiments provided in this application may include at least one type of relational database and non-relational database. Non-relational databases may include, but are not limited to, blockchain-based distributed databases. The processors involved in the embodiments provided in this application may be general-purpose processors, central processing units, graphics processing units, digital signal processors, programmable logic devices, quantum computing-based data processing logic devices, etc., and are not limited to these.

[0094] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0095] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this application should be determined by the appended claims.

Claims

1. A method for detecting dry burning in a stove, characterized in that, The cooktop includes a control unit and a thermoelectric generator connected to the control unit; the method includes: Obtain the reference voltage of the thermoelectric power generation unit at its maximum power setting, and the current actual power generation voltage; the reference voltage is the maximum power generation voltage of the thermoelectric power generation unit at the corresponding power setting under normal conditions. Within a preset interval, determine whether the actual generated voltage exceeds the reference voltage at the maximum power level; If so, the stove is determined to be in a dry-burning state; The process of determining whether the actual generated voltage exceeds the reference voltage at the maximum power level within a preset interval includes, before: Obtain the reference voltage of the thermoelectric power generation unit under different power levels; Determine the current actual firepower level and the reference voltage corresponding to the actual firepower level; If the actual generated voltage is greater than the reference voltage corresponding to the actual power level, then it is determined whether the actual generated voltage exceeds the reference voltage under the maximum power level within a preset interval.

2. The method according to claim 1, characterized in that, After determining whether the actual generated voltage exceeds the reference voltage at the maximum power level within a preset interval, the process further includes: If not, the stove is determined to be in normal combustion condition.

3. The method according to claim 1, characterized in that, Determine the current actual firepower level, including: The comparison results between the actual generated voltage and the reference voltage of each power level are obtained. If the comparison results meet the power level acquisition conditions, the actual power level is determined. The conditions for obtaining the gear position include: the actual generated voltage is greater than the reference voltage corresponding to the adjacent gear of the actual power level, and the actual generated voltage is less than or equal to the reference voltage corresponding to the actual power level.

4. The method according to claim 1, characterized in that, The reference values ​​corresponding to each power level of the thermoelectric generator unit under ideal room temperature conditions are obtained, and the compensation values ​​are obtained. The compensation values ​​are used to compensate for the errors of the thermoelectric generator unit itself and the environmental errors. The maximum power generation voltage at each power level is the sum of the compensation value and the reference value corresponding to each power level.

5. The method according to claim 1, characterized in that, The location of the thermoelectric generator unit meets the measurement conditions; the measurement conditions include: when the thermoelectric generator unit is at the minimum power level and the stove is in a dry-burning state, the actual generated voltage exceeds the reference voltage at the maximum power level.

6. The method according to claim 1, characterized in that, After determining the current actual firepower level and the corresponding reference voltage, the process also includes: If the actual generated voltage is less than or equal to the reference voltage corresponding to the actual firepower level, the stove is determined to be in normal combustion state.

7. A dry-burning detection device for a stove, characterized in that, The cooktop includes a control unit and a thermoelectric generator connected to the control unit; the thermoelectric generator is disposed on the cooktop near the area where the cookware is placed and where there is a temperature rise; the device includes: The parameter determination module is used to obtain the reference voltage of the thermoelectric power generation unit at the maximum power level and the current actual power generation voltage; the reference voltage is the maximum power generation voltage of the thermoelectric power generation unit at the corresponding power level under normal conditions. The comparison module is used to determine whether the actual generated voltage exceeds the reference voltage at the maximum power level within a preset interval. The determination module is used to determine if the stove is in a dry-burning state. The parameter determination module is further configured to obtain the reference voltage of the thermoelectric power generation unit under different power levels; determine the current actual power level and the reference voltage corresponding to the actual power level; The comparison module is further configured to determine whether the actual generated voltage exceeds the reference voltage at the maximum power level within a preset interval if the actual generated voltage is greater than the reference voltage corresponding to the actual power level.

8. A stove, characterized in that, The cooktop includes a control unit and a thermoelectric generator unit connected in sequence; the thermoelectric generator unit is located on the cooktop near the area where the pot is placed and where the temperature rises. The stove is used to perform the steps of the method according to any one of claims 1 to 6.

9. The stove according to claim 8, characterized in that, The thermoelectric power generation unit includes a thermoelectric generator; the thermoelectric generator is used to convert the heat energy transferred from the area with temperature rise into electrical energy.

Images