Over-temperature alarm method and system for air fryer

Abstract

The invention belongs to the technical field of air fryers, and particularly relates to an over-temperature alarm method and system for an air fryer, which intelligently analyzes whether the air fryer exceeds a safe operation range or not by monitoring the actual operation temperature of the air fryer in real time, and calculates a risk coefficient based on the over-temperature duration and the value of the exceeded safe operation range. Therefore, potential dangers are effectively evaluated; once a high-risk condition is detected, the system activates an early warning signal and prompts a user to check and adjust setting parameters; according to the method, the use safety of the equipment is improved, the potential over-temperature risk can be found under the condition that the user does not perceive, guidance is provided in time to help the user to quickly take corrective measures, equipment damage or safety accidents caused by improper use are avoided, and the user experience and the safety and reliability of the equipment are remarkably enhanced.

Description

Technical Field

[0001] The present invention belongs to the technical field of air fryers, and particularly relates to an over-temperature alarm method and system for an air fryer. Background Art

[0002] In the existing air fryer designs, basic temperature control and over-temperature protection mechanisms are usually integrated. These mechanisms mainly rely on temperature controllers and fuse devices at the hardware level to prevent the device from being damaged due to overheating or causing safety hazards. For example, when the internal temperature reaches a preset safety upper limit, the temperature controller will automatically cut off the power supply of the heating element to avoid further temperature rise. However, this traditional protection measure often lacks the ability to intelligently identify and warn against abnormal working states caused by user misoperations (such as setting the temperature far beyond the recommended value or cooking for too long).

[0003] Currently, it is mostly through basic temperature controllers and fuse devices to prevent overheating; the temperature monitoring system is limited to power-off protection at the hardware level and does not consider the rationality of user-set parameters; there is a lack of intelligent evaluation and warning functions for continuous high temperature and its potential risks. Therefore, how to achieve intelligent identification and warning of abnormal working states caused by user errors to effectively prevent possible safety hazards is an urgent problem to be solved. Summary of the Invention

[0004] The purpose of the present invention is to provide an over-temperature alarm method and system for an air fryer, which can not only monitor whether the actual operating temperature exceeds the safe range, but also calculate a risk coefficient based on the over-temperature duration and the exceeded safe operating range value, and accordingly evaluate whether there is a potential danger, so as to solve the problems raised in the above background art.

[0005] To achieve the above purpose, on the one hand, the present invention proposes an over-temperature alarm method for an air fryer, including the following steps: Start the air fryer and set initial cooking parameters, calculate a safe operating range based on the initial cooking parameters; monitor whether the actual operating temperature of the air fryer exceeds the safe operating range, if the actual operating temperature exceeds the safe operating range, start timing to determine the over-temperature duration; calculate a risk coefficient according to the over-temperature duration and the exceeded safe operating range value, compare the risk coefficient with a preset threshold to evaluate whether there is a potential danger; when the risk coefficient exceeds the preset threshold, activate a warning signal, and prompt the user to check and adjust the setting parameters of the air fryer through the warning signal.

[0006] Preferably, the starting the air fryer and setting the initial cooking parameters includes: Input the initial temperature Ts and cooking time ts0 through the control panel of the air fryer; Based on the initial temperature Ts, the upper limit of the recommended safe operating range is calculated as Ts + ΔTs, where ΔTs = K×(Tm - Ts), K has a value of 0.1, ΔTs is the safety margin, and Tm is the maximum tolerable temperature of the air fryer heating element; Compare the initial temperature Ts and the cooking time ts0 with the safe operating range. If Ts exceeds the range, display an adjustment prompt message on the control panel to guide the user to re-enter the temperature value until the safety conditions are met; Save the finally confirmed initial temperature Ts and cooking time to the log file of the air fryer.

[0007] Preferably, a safe operating range is calculated based on the initial cooking parameters, including: Obtain the initial temperature Ts input on the control panel; Determine the material thermal stability influence coefficient M according to the initial temperature Ts, calculated by the formula M = 1 + 0.05×(Tm - Ts); Use the influence coefficient M and the initial temperature Ts to calculate the lower limit Tmin of the safe operating range through the formula Tmin = Ts - M×ΔTs; Set the upper limit of the safe operating range as Tmax, and save Tmin and Tmax to the log file of the air fryer.

[0008] Preferably, monitor whether the actual operating temperature of the air fryer exceeds the safe operating range, including: Real-time collect the actual operating temperature Ta inside the air fryer through a temperature sensor, and compare the actual operating temperature Ta with the lower limit Tmin and upper limit Tmax of the safe operating range saved in the log file; Calculate the exceeding ratio P. If Ta is greater than Tmax, then P = (Ta - Tmax) / Tmax×100%, if Ta is less than Tmin, then P = (Tmin - Ta) / Tmin×100%; When the value of the ratio P exceeds the preset threshold L, mark the current state as abnormal, and record the actual operating temperature Ta and the timestamp to the log file of the air fryer.

[0009] Preferably, if the actual operating temperature exceeds the safe operating range, start timing to determine the over-temperature duration, including: When it is detected that the actual operating temperature Ta exceeds the safe operating range, record the current moment as t1; Continuously monitor the actual operating temperature Ta until it returns to the safe operating range, record the moment as t2, and calculate the over-temperature duration Δta through the formula Δta = t2 - t1; If the Δta exceeds the preset time threshold Td, mark the over-temperature event as severe, and update the risk assessment level based on the value of the ratio P and the Δta. Use the formula Rc = P * Td / Δta to adjust the risk assessment level.

[0010] Preferably, calculate the risk coefficient according to the over-temperature duration and the exceeded safe operating range value, including: Obtain the over-temperature duration Δta and the degree P to which the actual operating temperature Ta exceeds the safe operating range; Based on the value of P and the Δta, calculate the preliminary risk coefficient Cf through the formula Cf = PΔta; Introduce a correction factor F determined according to the heat resistance of the materials used in the air fryer and adjust it through the formula F = 1 - (0.01(Ta - Tmax)). Combine the preliminary risk coefficient Cf with the correction factor F and use the formula Rc = Cf / F to calculate the final risk coefficient Rc.

[0011] Preferably, compare the risk coefficient with the preset threshold to evaluate whether there is a potential danger, including: Obtain the final risk coefficient Rc; Determine the preset risk threshold Rth based on the safety standard of the air fryer and the material tolerance limit; Compare the final risk coefficient Rc with the risk threshold Rth and calculate the difference Dif through the formula Dif = Rc - Rth; If the Dif is greater than 0, mark the current state as high risk and adjust the warning level Lv according to the size of the Dif. Use the formula Lv = 1 + Int(Dif / 5) to determine.

[0012] Preferably, when the risk coefficient exceeds the preset threshold, activate the warning signal, including: Check whether the difference Dif is greater than 0 to confirm whether the final risk coefficient Rc exceeds the risk threshold Rth; If the Dif is greater than 0, determine the warning signal type according to the warning level Lv and select the warning method through the formula Type = 2 * Lv - 1; Start the corresponding warning mechanism according to the value of Type. If Type is equal to 3, trigger an audible alarm and record the current state and timestamp in the log file; Add an increment counter Cnt and use the formula Cnt = Cnt + 1 to track the number of consecutive warnings. When the Cnt reaches the preset maximum number of consecutive warnings Mc, disconnect the power supply of the air fryer.

[0013] Preferably, prompt the user to check and adjust the setting parameters of the air fryer through the warning signal, including: After the alarm sound is emitted, calculate the recommended adjustment amplitude Amp, which is determined using the formula Amp = Rc / 10 based on the final risk coefficient Rc and the current setting parameters; Display a warning message and a recommended adjustment plan on the display screen of the air fryer, including specific values for reducing the temperature value or shortening the cooking time, and calculate the new target temperature NewTs according to the formula NewTs = Ts - Amp * Ts; Wait for the user's response. If no user operation is detected within the preset time period W, increment the emergency counter Ecnt, and track the number of unresponsive times through the formula Ecnt = Ecnt + 1; When the Ecnt reaches the threshold Eth, automatically reduce the set temperature of the air fryer.

[0014] On the other hand, the present invention proposes an over-temperature alarm system for an air fryer, comprising: A startup and initial setting module, configured to start the air fryer and set initial cooking parameters, and calculate a safe operation range based on the initial cooking parameters; A real-time monitoring and over-temperature timing module, configured to monitor whether the actual operating temperature of the air fryer exceeds the safe operation range. If the actual operating temperature exceeds the safe operation range, start timing to determine the over-temperature duration; A risk assessment and early warning preparation module, configured to calculate a risk coefficient according to the over-temperature duration and the exceeded safe operation range value, compare the risk coefficient with a preset threshold, and evaluate whether there is a potential danger; An early warning and user interaction module, configured to activate an early warning signal when the risk coefficient exceeds the preset threshold, and prompt the user to check and adjust the setting parameters of the air fryer through the early warning signal.

[0015] Technical effects and advantages of the present invention: The over-temperature alarm method and system for an air fryer proposed by the present invention have the following advantages compared with the prior art: The present invention effectively evaluates potential dangers by real-time monitoring the actual operating temperature of the air fryer, intelligently analyzing whether it exceeds the safe operation range, and calculating the risk coefficient based on the over-temperature duration and the exceeded safe operation range value; once a high-risk situation is detected, the system will activate an early warning signal and prompt the user to check and adjust the setting parameters; this method not only improves the safety of equipment use, but also can detect potential over-temperature risks without the user's awareness, and timely provide guidance to help the user quickly take corrective measures to avoid equipment damage or safety accidents caused by improper use, significantly enhancing the user experience and the safety and reliability of the equipment. Description of the Drawings

[0016] Figure 1Flow chart of an over-temperature alarm method for an air fryer according to the present invention; Figure 2 Block diagram of an over-temperature alarm system for an air fryer according to the present invention. Detailed implementation manners

[0017] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. The specific embodiments described herein are only used to explain the present invention, and are not used to limit the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0018] The present invention provides an over-temperature alarm method for an air fryer as shown in Figure 1 which can monitor the actual operating temperature of the air fryer in real time, intelligently analyze whether it exceeds the safe operating range, and calculate the risk coefficient based on the over-temperature duration and the value exceeding the safe operating range value, so as to effectively evaluate the potential danger; once a high-risk situation is detected, the system will activate a warning signal and prompt the user to check and adjust the set parameters; specifically as follows: In this embodiment, the over-temperature alarm method for an air fryer includes the following steps: Step 1: Start the air fryer and set the initial cooking parameters; specifically including: Input the initial temperature Ts and cooking time ts0 through the control panel of the air fryer; allow the user to set the cooking parameters according to their own needs, and at the same time provide basic data for subsequent safety evaluation.

[0019] Based on the initial temperature Ts, calculate that the upper limit of the recommended safe operating range is Ts + ΔTs, where ΔTs = K × (Tm - Ts), K is taken as 0.1, ΔTs is the safety margin, and Tm is the maximum tolerable temperature of the heating element of the air fryer; this formula is used to calculate a safety margin ΔTs based on the gap between the initial temperature Ts set by the user and the maximum tolerable temperature Tm of the device. K is an empirical coefficient used to ensure an additional safety margin without approaching the limit. Ensure that the temperature set by the user does not get too close to the maximum tolerable temperature Tm of the heating element of the air fryer, thereby reducing the overheating risk. Assume Tm is 250 °C and the user sets Ts to 200 °C, then ΔTs = 0.1 × (250 - 200) = 5 °C. Therefore, the upper limit of the recommended safe operating range is 205 °C (i.e., 200 °C + 5 °C).

[0020] Compare the initial temperature Ts and the cooking time ts0 with the safe operating range. If Ts exceeds the range, display an adjustment prompt message on the control panel to guide the user to re-enter the temperature value until the safety conditions are met; provide real-time feedback on whether the user's settings are safe, prevent potential hazards caused by incorrect operations, and improve the usage safety.

[0021] If Ts set by the user plus ΔTs exceeds Tm, the user needs to be prompted to reset the temperature. For example, if the user attempts to set Ts to 246 °C, then even after adding ΔTs (246 °C + 5 °C = 251 °C), it exceeds Tm (250 °C), and the system should prompt the user to reset the temperature.

[0022] Save the finally confirmed initial temperature Ts and cooking time to the log file of the air fryer. Record the user's setting parameters for subsequent analysis and tracking, which helps with troubleshooting and improving the user experience. Assume that after adjustment, the finally confirmed Ts by the user is 200 °C and ts0 is 30 minutes, then these data will be saved to the log file for subsequent query or data analysis.

[0023] Step 2: Calculate a safe operating range based on the initial cooking parameters; specifically including: Obtain the initial temperature Ts input on the control panel. Determine the material thermal stability influence coefficient M according to the initial temperature Ts, which is calculated by the formula M = 1 + 0.05 * (Tm - Ts); adjust the material thermal stability influence coefficient according to the temperature set by the user to ensure more accurate safety assessment and avoid risks caused by the decline of material performance due to high temperature. Assume Tm is 250 °C and the user sets Ts to 200 °C, then M = 1 + 0.05 * (250 - 200) = 1 + 2.5 = 3.5.

[0024] Use the influence coefficient M and the initial temperature Ts to calculate the lower limit Tmin of the safe operating range through the formula Tmin = Ts - M * ΔTs; this formula is used to calculate the lower limit Tmin of the safe operating range. By subtracting the safety margin ΔTs weighted by the material thermal stability influence coefficient M (already calculated in Step 1), a reasonable minimum operating temperature can be obtained to ensure that it will not be too low even considering the material thermal stability.

[0025] Ensure that the temperature set by the user will not be lower than the minimum temperature required for the normal operation of the device, and prevent the situation where the food is not fully cooked or the device cannot work properly due to too low temperature. Assume ΔTs is 5 °C (as described above), then Tmin = 200 - 3.5 * 5 = 200 - 17.5 = 182.5 °C.

[0026] Set the upper limit of the safe operating range to Tmax, and save the Tmin and Tmax to the log file of the air fryer. Recording the upper and lower limit values of the safe operating range facilitates subsequent monitoring of whether the actual operating temperature is within the safe range, and helps with troubleshooting and data analysis. Assuming Tmax is 250 °C (i.e., the maximum tolerable temperature of the heating element), then save Tmin (182.5 °C) and Tmax (250 °C) to the log file for subsequent query or analysis.

[0027] Step 3: Monitor whether the actual operating temperature of the air fryer exceeds the safe operating range; specifically including: Real-time collect the actual operating temperature Ta inside the air fryer through a temperature sensor, and compare the actual operating temperature Ta with the lower limit Tmin and upper limit Tmax of the safe operating range saved in the log file; ensure that the working status of the air fryer can be monitored in real time, promptly detect and respond to any over-temperature situations, and prevent potential safety hazards.

[0028] Calculate the exceeding ratio P. If Ta is greater than Tmax, then P = (Ta - Tmax) / Tmax * 100%. If Ta is less than Tmin, then P = (Tmin - Ta) / Tmin * 100%; this formula is used to quantify the deviation degree of the actual operating temperature Ta relative to the safe operating range.

[0029] By calculating the exceeding ratio P, the degree of deviation of the current temperature from the safe range can be more accurately evaluated, which helps with subsequent risk assessment and warning mechanisms. Assuming Tmin is 182.5 °C and Tmax is 250 °C, if the actual operating temperature Ta is 260 °C, then P = (260 - 250) / 250 * 100% = 4%. If Ta is 175 °C, then P = (182.5 - 175) / 182.5 * 100% = 4.11%.

[0030] When the value of the ratio P exceeds the preset threshold L, mark the current status as abnormal, and record the actual operating temperature Ta and the timestamp to the log file of the air fryer. By setting the threshold L to determine whether to trigger a warning or further safety measures, ensure that potential risks can be promptly responded to, and safeguard the safety of users and equipment.

[0031] Assume the preset threshold L is 5%. If the actual operating temperature Ta is 260 °C (as calculated above, P = 4%), it will not be marked as abnormal at this time. But if Ta rises to 275 °C, then P = (275 - 250) / 250 * 100% = 10%, exceeding the threshold L. The system will mark the current status as abnormal and record the actual operating temperature Ta (275 °C) and the timestamp to the log file.

[0032] Step Four: If the actual operating temperature exceeds the safe operating range, start timing to determine the over-temperature duration; specifically including: When it is detected that the actual operating temperature Ta exceeds the safe operating range, record the current time as t1; Continuously monitor the actual operating temperature Ta until it returns to the safe operating range, record the time as t2, and calculate the over-temperature duration Δta through the formula Δta = t2 - t1; this formula is used to calculate the over-temperature duration Δta. By comparing the two timestamps (t1 and t2), the duration of the air fryer outside the safe operating range can be obtained. Accurately measuring the duration of the over-temperature event helps to evaluate the severity of the event and provides data support for further risk assessment. Suppose t1 is 14:35 and t2 is 14:40, then Δta = t2 - t1 = 5 minutes.

[0033] If the Δta exceeds the preset time threshold Td, mark the over-temperature event as severe, and update the risk assessment level according to the value of the ratio P and the Δta, using the formula Rc = P * Td / Δta to adjust the risk assessment level. By combining the exceeding ratio P and the relationship between the over-temperature duration Δta and the preset time threshold Td, the risk level of the over-temperature event can be quantified. A larger Rc value indicates a higher risk.

[0034] Comprehensively evaluate the risk based on the over-temperature duration and the deviation degree to ensure that truly severe over-temperature events can be identified and corresponding measures are taken to reduce the risk. Suppose the preset time threshold Td is 3 minutes, the exceeding ratio P is 10% (as mentioned before, Ta = 275°C, Tmax = 250°C), and the over-temperature duration Δta is 5 minutes, then Rc = P * Td / Δta = 10% * 3 / 5 = 6%. Since Δta exceeds Td (5 minutes > 3 minutes), this over-temperature event is marked as severe.

[0035] Step Five: Calculate the risk coefficient according to the over-temperature duration and the value of the exceeded safe operating range; specifically including: Obtain the over-temperature duration Δta and the degree P to which the actual operating temperature Ta exceeds the safe operating range; Based on the P value and the Δta, calculate the preliminary risk coefficient Cf through the formula Cf = PΔta; by combining the exceeding ratio P (indicating the temperature deviation degree) and the over-temperature duration Δta, a preliminary risk assessment value can be obtained. A larger Cf value indicates a higher potential risk. Suppose the exceeding ratio P is 10% (as mentioned before, Ta = 275°C, Tmax = 250°C), and the over-temperature duration Δta is 5 minutes, then Cf = P * Δta = 10% * 5 = 0.5.

[0036] Introduce a correction factor F determined based on the heat resistance of the materials used in the air fryer, and adjust it through the formula F = 1 - (0.01(Ta - Tmax)). As the actual operating temperature Ta approaches or exceeds the maximum tolerance temperature Tmax, the correction factor F gradually decreases, indicating a decrease in the stability of the materials at high temperatures. By considering the influence of material heat resistance, the risk assessment becomes more accurate, avoiding additional risks brought about by the degradation of material properties. Suppose the actual operating temperature Ta is 275 °C and the maximum tolerance temperature Tmax is 250 °C, then F = 1 - (0.01*(275 - 250)) = 1 - 0.25 = 0.75.

[0037] Combine the preliminary risk coefficient Cf with the correction factor F, and use the formula Rc = Cf / F to calculate the final risk coefficient Rc. By dividing the preliminary risk coefficient Cf by the correction factor F, a risk assessment value adjusted by material heat resistance can be obtained. A larger Rc value indicates a higher risk. Considering the temperature deviation degree, duration, and material heat resistance comprehensively, a comprehensive risk assessment result is obtained, which helps to formulate effective countermeasures.

[0038] For example, if Cf is 0.5 and F is 0.75, then Rc = Cf / F = 0.5 / 0.75 = 0.67.

[0039] Through the above steps, the air fryer can calculate the risk coefficient based on the over-temperature duration and the degree of exceeding the safe operating range, and adjust it by introducing the correction factor of material heat resistance. This method not only improves the ability to identify potential hazards but also ensures accurate risk assessment under different conditions.

[0040] Step Six: Compare the risk coefficient with a preset threshold to evaluate whether there are potential hazards; specifically including: Obtain the final risk coefficient Rc; determine the preset risk threshold Rth based on the safety standards of the air fryer and the material tolerance limit; set a safety limit to judge whether the current risk requires triggering a warning or taking further measures. Rth reflects the maximum acceptable risk level of the equipment under normal operating conditions.

[0041] Compare the final risk coefficient Rc with the risk threshold Rth, and calculate the difference Dif through the formula Dif = Rc - Rth; a positive value indicates that the current risk exceeds the preset safety limit, and a negative value or zero indicates that the risk is within the acceptable range.

[0042] If the Dif is greater than 0, mark the current status as high-risk and adjust the warning level Lv according to the magnitude of the Dif, which is determined using the formula Lv = 1 + Int(Dif / 5). Dynamically adjust the warning level based on the degree of exceeding the risk threshold to ensure that corresponding countermeasures can be taken for different degrees of risk and improve the response efficiency. Suppose in a certain over-temperature event: The actual operating temperature Ta is 275 °C and Tmax is 250 °C; The over-temperature duration Δta is 5 minutes; The risk threshold Rth is set to 0.5.

[0043] According to the above steps: Calculate the exceeding ratio P: P = (275 - 250) / 250 * 100% = 10%; The preliminary risk coefficient Cf: Cf = P * Δta = 10% * 5 = 0.5; The correction factor F: F = 1 - (0.01 * (275 - 250)) = 0.75; The final risk coefficient Rc: Rc = Cf / F = 0.5 / 0.75 = 0.67; The difference Dif: Dif = Rc - Rth = 0.67 - 0.5 = 0.17; The warning level Lv: Lv = 1 + Int(0.17 / 5) = 1 + 0 = 1.

[0044] Through these steps, the air fryer can accurately evaluate the risk degree of the over-temperature event and adjust the warning level according to the actual situation. This not only improves the safety of the system but also ensures that users can receive timely notifications and guidance when encountering potential risks.

[0045] Step Seven: When the risk coefficient exceeds the preset threshold, activate the warning signal; specifically including: Check whether the difference Dif is greater than 0 to confirm whether the final risk coefficient Rc exceeds the risk threshold Rth; by comparing Dif and 0, it can be determined whether the current risk exceeds the preset safety limit. If Dif is greater than 0, it indicates a high risk and further measures need to be taken.

[0046] If the Dif is greater than 0, determine the warning signal type according to the warning level Lv, and select the warning method through the formula Type = 2 * Lv - 1; for example, sound alarms, visual cues, etc. A larger Lv value will result in a larger Type value, indicating a more urgent warning method.

[0047] Start the corresponding warning mechanism according to the Type value. If Type is equal to 3, trigger an audible alarm and record the current status and timestamp into the log file; through different types of warning mechanisms (such as audible alarms, visual cues, etc.), notify the user of the existing risks in a timely manner and record relevant information for subsequent analysis and troubleshooting.

[0048] Add an increment counter Cnt, and use the formula Cnt = Cnt + 1 to track the consecutive warning times. By tracking the consecutive warning times, more stringent measures (such as power-off protection) can be automatically taken when multiple high-risk events occur, thereby further ensuring the safety of the device and the user. When the Cnt reaches the preset maximum consecutive warning times Mc, disconnect the power supply of the air fryer to prevent the device from being damaged due to continuous high temperature or causing safety accidents, and ensure the safety of the user and the device.

[0049] Suppose in a certain over-temperature event: The final risk coefficient Rc is 0.67, and the risk threshold Rth is 0.5; The difference Dif is 0.17, and the warning level Lv is 1; The preset maximum consecutive warning times Mc is 3.

[0050] According to the above steps: Confirm whether it exceeds the risk threshold: Dif = 0.17 > 0, indicating that Rc exceeds Rth.

[0051] Determine the warning signal type: Type = 2 * Lv - 1 = 2 * 1 - 1 = 1 (assuming Lv is 1 and Type is 1; if Lv is 2, then Type is 3).

[0052] Start the corresponding warning mechanism: If Type is 3, trigger an audible alarm and record the current status and timestamp into the log file.

[0053] Track the consecutive warning times: The initial Cnt is 0. After the first warning is triggered, Cnt = 0 + 1 = 1.

[0054] Execute additional safety measures: If the warning is triggered continuously three times (Cnt reaches 3), the system will automatically disconnect the power supply of the air fryer.

[0055] Through these steps, the air fryer can automatically activate the warning signal when detecting high risks and take further safety measures according to the consecutive warning times.

[0056] Step Eight: Prompt the user to check and adjust the setting parameters of the air fryer through the warning signal; specifically including: Calculate the recommended adjustment amplitude Amp after the alarm sound is emitted. Based on the final risk coefficient Rc and the current setting parameters, use the formula Amp = Rc / 10 to determine; this formula is used to calculate the recommended adjustment amplitude Amp based on the final risk coefficient Rc. Amp represents the proportion of the temperature or time that needs to be adjusted. A larger Rc value will result in a larger Amp value, indicating that a larger adjustment is required.

[0057] Display a warning message and the recommended adjustment plan on the display screen of the air fryer, including the specific values of reducing the temperature value or shortening the cooking time. Calculate the new target temperature NewTs according to the formula NewTs = Ts - Amp * Ts; this formula is used to calculate the new target temperature NewTs. Based on the initial temperature Ts set by the user and the recommended adjustment amplitude Amp, an adjusted safe temperature can be obtained. Reduce the risk by reducing the initial temperature.

[0058] Wait for the user's response. If no user operation is detected within the preset time period W, increment the emergency counter Ecnt, and use the formula Ecnt = Ecnt + 1 to track the number of unresponsive times; by setting the preset time period W, the system can automatically record the number of unresponsive times when the user fails to respond in a timely manner, ensuring that further safety measures are taken after multiple unresponsive times to avoid potential risks.

[0059] When the Ecnt reaches the threshold Eth, automatically reduce the set temperature of the air fryer to ensure that the device will not be damaged or cause a safety accident due to continuous high temperature.

[0060] Suppose in a certain over-temperature event: The final risk coefficient Rc is 0.67; The initial set temperature Ts is 200 °C; The preset time period W is 5 minutes; The initial value of the emergency counter Ecnt is 0, and the maximum number of unresponsive times Eth is 3.

[0061] According to the above steps: Calculate the recommended adjustment amplitude: Amp = Rc / 10 = 0.67 / 10 = 0.067.

[0062] Display the warning message and the recommended adjustment plan: NewTs = Ts - Amp * Ts = 200 - 0.067 * 200 = 186.6 °C.

[0063] Display the warning message on the display screen: "High temperature risk detected. Please adjust the temperature to 186.6 °C."

[0064] Wait for the user's response. If no user operation is detected within 5 minutes, increment the emergency counter Ecnt: The initial value of Ecnt is 0. After the first non-response, Ecnt = Ecnt + 1 = 0 + 1 = 1.

[0065] If there are three consecutive non-responses (Ecnt reaches 3), the set temperature will be automatically reduced to 186.6 °C.

[0066] Through these steps, the air fryer can provide specific adjustment suggestions to the user when high risks are detected and automatically take measures when the user fails to respond in a timely manner.

[0067] In addition, the present invention proposes an over-temperature alarm system for an air fryer, as Figure 2 shown, including: A startup and initial setting module, used to start the air fryer and set initial cooking parameters, and calculate a safe operating range based on the initial cooking parameters; A real-time monitoring and over-temperature timing module, used to monitor whether the actual operating temperature of the air fryer exceeds the safe operating range. If the actual operating temperature exceeds the safe operating range, start timing to determine the over-temperature duration; A risk assessment and early warning preparation module, used to calculate a risk coefficient according to the over-temperature duration and the exceeded safe operating range value, compare the risk coefficient with a preset threshold, and evaluate whether there is a potential danger; An early warning and user interaction module, used to activate an early warning signal when the risk coefficient exceeds the preset threshold, and prompt the user to check and adjust the setting parameters of the air fryer through the early warning signal.

[0068] In addition, each of the above modules is also used to implement other steps of the above over-temperature alarm method for an air fryer when executing, which will not be elaborated one by one here.

[0069] To sum up, by real-time monitoring the actual operating temperature of the air fryer, intelligently analyzing whether it exceeds the safe operating range, and calculating the risk coefficient based on the over-temperature duration and the exceeded safe operating range value, potential dangers can be effectively evaluated; once a high-risk situation is detected, the system will activate an early warning signal and prompt the user to check and adjust the setting parameters.

[0070] This method not only improves the safety of equipment use, but also can detect potential over-temperature risks without the user's awareness, provide guidance in a timely manner to help the user quickly take corrective measures, avoid equipment damage or safety accidents caused by improper use, and significantly enhance the user experience and the safety and reliability of the equipment.

[0071] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An over-temperature alarm method for an air fryer, characterized in that: The following steps are involved: Starting the air fryer and setting initial cooking parameters, and calculating a safe operating range based on the initial cooking parameters; Monitoring whether the actual operating temperature of the air fryer exceeds the safe operating range, and if the actual operating temperature exceeds the safe operating range, starting timing to determine the over-temperature duration; Calculate a risk factor based on the over-temperature duration and the value of the exceeded safe operating range, compare the risk factor with a preset threshold, and evaluate whether there is a potential danger; When the risk factor exceeds the preset threshold, an early warning signal is activated, and the early warning signal is used to prompt the user to check and adjust the setting parameters of the air fryer.

2. The over-temperature alarm method for an air fryer according to claim 1, characterized in that: The method of starting the air fryer and setting initial cooking parameters includes: Enter the initial temperature Ts and cooking time ts0 through the control panel of the air fryer; Based on the initial temperature Ts, the recommended upper limit of the safe operating range is calculated to be Ts+ΔTs, where ΔTs=K×(Tm-Ts), K is 0.1, ΔTs is the safety margin, and Tm is the maximum tolerable temperature of the air fryer heating element; Compare the initial temperature Ts and cooking time ts0 with the safe operating range, and if Ts exceeds the range, display an adjustment prompt message on the control panel to guide the user to re-enter the temperature value until the safety condition is met; The final confirmed initial temperature Ts and cooking time are saved in the log file of the air fryer.

3. The over-temperature alarm method for an air fryer according to claim 2, characterized in that: A safe operating range is calculated based on the initial cooking parameters, including: Obtaining the initial temperature Ts input on the control panel; The material thermal stability influence coefficient M is determined according to the initial temperature Ts and is calculated by the formula M=1+0.05*(Tm-Ts); The lower limit Tmin of the safe operating range is calculated by using the influence coefficient M and the initial temperature Ts through the formula Tmin=Ts-M*ΔTs; The upper limit of the safe operating range is set to Tmax, and the Tmin and Tmax are saved in the log file of the air fryer.

4. The over-temperature alarm method for an air fryer according to claim 3, characterized in that: Monitoring whether the actual operating temperature of the air fryer exceeds the safe operating range includes: The actual operating temperature Ta inside the air fryer is collected in real time by a temperature sensor, and the actual operating temperature Ta is compared with the lower limit Tmin and the upper limit Tmax of the safe operating range saved in the log file; Calculate the excess ratio P. If Ta is greater than Tmax, then P = (Ta-Tmax) / Tmax100%; if Ta is less than Tmin, then P = (Tmin-Ta) / Tmin100%; When the value of the ratio P exceeds a preset threshold value L, the current state is marked as abnormal, and the actual operating temperature Ta and timestamp are recorded in the log file of the air fryer.

5. The over-temperature alarm method for an air fryer according to claim 4, characterized in that: If the actual operating temperature exceeds the safe operating range, the timer starts to determine the over-temperature duration, including: When it is detected that the actual operating temperature Ta exceeds the safe operating range, the current time is recorded as t1; Continuously monitor the actual operating temperature Ta until it returns to the safe operating range, record the time as t2, and calculate the over-temperature duration Δta by the formula Δta=t2-t1; If the Δta exceeds the preset time threshold Td, the over-temperature event is marked as severe, and the risk assessment level is updated according to the value of the ratio P and the Δta, and the risk assessment level is adjusted using the formula Rc=P*Td / Δta.

6. The over-temperature alarm method for an air fryer according to claim 5, characterized in that: According to the over-temperature duration and the exceeded safe operating range value, the risk factor is calculated, including: Obtaining the over-temperature duration Δta and the degree P to which the actual operating temperature Ta exceeds the safe operating range; Based on the P value and the Δta, a preliminary risk factor Cf is calculated by the formula Cf=PΔta; A correction factor F determined according to the heat resistance of the materials used in the air fryer is introduced and adjusted by the formula F=1-(0.01(Ta-Tmax)). The preliminary risk factor Cf is combined with the correction factor F, and the final risk factor Rc is calculated using the formula Rc=Cf / F.

7. The over-temperature alarm method for an air fryer according to claim 6, characterized in that: Compare the risk factor with the preset threshold to assess whether there is potential danger, including: Obtaining the final risk coefficient Rc; Determine the preset risk threshold Rth based on the safety standards and material tolerance limits of the air fryer; Compare the final risk coefficient Rc with the risk threshold Rth, and calculate the difference Dif by the formula Dif=Rc-Rth; If the Dif is greater than 0, the current state is marked as high risk, and the warning level Lv is adjusted according to the size of the Dif, using the formula Lv=1+Int(Dif / 5) to determine.

8. The over-temperature alarm method for an air fryer according to claim 7, characterized in that: When the risk factor exceeds the preset threshold, an early warning signal is activated, including: Check whether the difference Dif is greater than 0 to confirm whether the final risk coefficient Rc exceeds the risk threshold Rth; If the Dif is greater than 0, the warning signal type is determined according to the warning level Lv, and the warning mode is selected by the formula Type=2*Lv-1; The corresponding warning mechanism is activated according to the Type value. If Type is equal to 3, a sound alarm is triggered and the current status and timestamp are recorded in the log file; Add an incremental counter Cnt, and track the number of consecutive warnings through the formula Cnt=Cnt+1. When the Cnt reaches the preset maximum number of consecutive warnings Mc, disconnect the power supply of the air fryer.

9. The over-temperature alarm method for an air fryer according to claim 8, characterized in that: The warning signal prompts the user to check and adjust the setting parameters of the air fryer, including: After the alarm sounds, the recommended adjustment amplitude Amp is calculated, based on the final risk factor Rc and the current setting parameters, using the formula Amp=Rc / 10 to determine; Displaying warning information and suggested adjustment plans on the display screen of the air fryer, including specific values ​​for lowering the temperature value or shortening the cooking time, and calculating the new target temperature NewTs according to the formula NewTs=Ts-Amp*Ts; Waiting for user response. If no user operation is detected within the preset time period W, the emergency counter Ecnt is incremented, and the number of unresponsive times is tracked by the formula Ecnt=Ecnt+1; If the Ecnt reaches the threshold value Eth, the set temperature of the air fryer is automatically lowered.

10. An over-temperature alarm system for an air fryer for implementing the method according to any one of claims 1 to 9, characterized in that: include: A startup and initial setting module, used to start the air fryer and set initial cooking parameters, and calculate a safe operating range based on the initial cooking parameters; A real-time monitoring and over-temperature timing module is used to monitor whether the actual operating temperature of the air fryer exceeds the safe operating range. If the actual operating temperature exceeds the safe operating range, the timing is started to determine the over-temperature duration; A risk assessment and early warning preparation module is used to calculate a risk factor according to the over-temperature duration and the exceeded safe operating range value, compare the risk factor with a preset threshold value, and assess whether there is a potential danger; The early warning and user interaction module is used to activate an early warning signal when the risk factor exceeds the preset threshold, and prompt the user to check and adjust the setting parameters of the air fryer through the early warning signal.

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