Over-temperature alarm method and system for an air fryer

Abstract

The present application belongs to the technical field of air fryers, and specifically relates to an over-temperature alarm method and system for an air fryer, which monitors the actual operating temperature of the air fryer in real time, intelligently analyzes whether the temperature exceeds the safe operating range, and calculates a risk coefficient based on the over-temperature duration and the exceeded safe operating range value, thereby effectively evaluating potential risks; once a high-risk situation is detected, the system will activate a 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 discovers potential over-temperature risks without the user's awareness, provides timely guidance to help the user take corrective measures quickly, avoids equipment damage or safety accidents caused by improper use, and significantly enhances the user experience and the safety and reliability of the equipment.

Description

TECHNICAL FIELD

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

[0002] In the existing air fryer design, basic temperature control and over-temperature protection mechanisms have been integrated. These mechanisms mainly rely on hardware-level temperature controllers and safety devices to prevent equipment damage or safety hazards caused by overheating. For example, when the internal temperature reaches the preset safety upper limit, the temperature controller automatically cuts 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 about abnormal working conditions caused by user misoperation (such as setting the temperature far beyond the recommended value or cooking for too long).

[0003] Currently, basic temperature controllers and safety devices are mainly used to prevent overheating; temperature monitoring systems are limited to hardware-level power-off protection, without considering the reasonableness of user-set parameters; and there is a lack of intelligent assessment and warning functions for continuous high temperature and its potential risks. How to intelligently identify and warn about abnormal working conditions caused by user errors, thereby effectively preventing possible safety hazards, is a problem that needs to be solved. SUMMARY

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

[0005] To achieve the above-mentioned purpose, the present application proposes, in one aspect, an over-temperature alarm method for an air fryer, comprising the following steps:

[0006] Starting the air fryer and setting initial cooking parameters, calculating a safety operating range based on the initial parameters; monitoring whether the actual operating temperature of the air fryer exceeds the safety operating range, if the actual operating temperature exceeds the safety operating range, starting timing to determine the over-temperature duration; calculating a risk coefficient according to the over-temperature duration and the exceeded safety operating range value, comparing the risk coefficient with a preset threshold to evaluate whether there is a potential danger; when the risk coefficient exceeds the preset threshold, activating a warning signal to prompt the user to check and adjust the setting parameters of the air fryer through the warning signal.

[0007] Preferably, the starting of the air fryer and the setting of the initial cooking parameters comprise:

[0008] inputting an initial temperature Ts and a cooking time ts0 through a control panel of the air fryer;

[0009] calculating a recommended upper limit of a safe operation range as Ts+ΔTs based on the initial temperature Ts, wherein ΔTs=K×(Tm-Ts), K is 0.1, ΔTs is a safety margin, and Tm is a maximum tolerance temperature of a heating element of the air fryer;

[0010] comparing the initial temperature Ts and the cooking time ts0 with the safe operation range, and if the Ts exceeds the range, displaying an adjustment prompt on the control panel to guide a user to re-input a temperature value until a safety condition is met;

[0011] saving the final confirmed initial temperature Ts and the cooking time to a log file of the air fryer.

[0012] Preferably, a safe operation range is calculated based on the initial parameters, including:

[0013] obtaining an initial temperature Ts input on the control panel;

[0014] determining a material thermal stability influence coefficient M according to the initial temperature Ts, and calculating the coefficient M through a formula M=1+0.05*(Tm-Ts);

[0015] calculating a lower limit Tmin of the safe operation range through a formula Tmin=Ts-M*ΔTs using the influence coefficient M and the initial temperature Ts;

[0016] setting an upper limit Tmax of the safe operation range, and saving the Tmin and the Tmax to the log file of the air fryer.

[0017] Preferably, whether an actual running temperature of the air fryer exceeds the safe operation range is monitored, including:

[0018] real-time collecting an actual running temperature Ta inside the air fryer through a temperature sensor, and comparing the actual running temperature Ta with the lower limit Tmin and the upper limit Tmax of the safe operation range saved in the log file;

[0019] calculating an exceeding proportion P, wherein if the Ta is greater than the Tmax, P=(Ta-Tmax) / Tmax*100%, and if the Ta is less than the Tmin, P=(Tmin-Ta) / Tmin*100%;

[0020] when a value of the proportion P exceeds a preset threshold L, marking a current state as abnormal, and recording the actual running temperature Ta and a time stamp to the log file of the air fryer.

[0021] Preferably, if the actual operating temperature exceeds the safe operating range, a timer is started to determine the duration of the over-temperature, comprising:

[0022] When the actual operating temperature Ta is detected to exceed the safe operating range, the current time t1 is recorded;

[0023] The actual operating temperature Ta is continuously monitored until it returns to the safe operating range, and the time t2 is recorded. The over-temperature duration Δta is calculated by the formula Δta = t2-t1.

[0024] If the Δta exceeds a preset time threshold Td, the over-temperature event is marked as serious, and the risk assessment level is updated according to the value of the proportion P and the Δta. The risk assessment level is adjusted using the formula Ra = P*Td / Δta.

[0025] Preferably, a risk coefficient is calculated according to the over-temperature duration and the value of the exceeded safe operating range, comprising:

[0026] The over-temperature duration Δta and the degree P of the actual operating temperature Ta exceeding the safe operating range are obtained;

[0027] Based on the P value and the Δta, a preliminary risk coefficient Cf is calculated by the formula Cf = PΔta.

[0028] A correction factor F is introduced according to the heat resistance of the air fryer material, and adjusted by the formula F = 1-(0.01(Ta-Tmax)). The preliminary risk coefficient Cf is combined with the correction factor F, and the final risk coefficient Rc is calculated using the formula Rc = Cf / F.

[0029] Preferably, the risk coefficient is compared with a preset threshold to assess whether there is a potential danger, comprising:

[0030] The final risk coefficient Rc is obtained;

[0031] A preset risk threshold Rth is determined based on the safety standards and material tolerance limits of the air fryer;

[0032] The final risk coefficient Rc is compared with the risk threshold Rth, and the difference Dif is calculated by the formula Dif = Rc-Rth.

[0033] 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, which is determined by the formula Lv = 1+Int(Dif / 5).

[0034] Preferably, when the risk coefficient exceeds the preset threshold, a warning signal is activated, comprising:

[0035] Check whether the difference Dif is greater than 0 to confirm whether the final risk coefficient Rc exceeds the risk threshold Rth;

[0036] If the Dif is greater than 0, the warning signal type is determined according to the warning level Lv, and the warning method is selected by the formula Type=2*Lv-1;

[0037] The corresponding early warning mechanism is activated based on the Type value. If Type equals 3, an audible alarm is triggered, and the current status and timestamp are recorded in the log file.

[0038] An incrementing counter Cnt is added, and the number of consecutive warnings is tracked by the formula Cnt = Cnt + 1. When Cnt reaches the preset maximum number of consecutive warnings Mc, the power to the air fryer is disconnected.

[0039] Preferably, the warning signal prompts the user to check and adjust the air fryer's settings, including:

[0040] After the alarm is issued, the recommended adjustment range Amp is calculated and determined using the formula Amp=Rc / 10 based on the final risk coefficient Rc and the current setting parameters.

[0041] The air fryer displays warning messages and suggested adjustments, including specific values ​​for lowering the temperature or shortening the cooking time, and calculates the new target temperature NewTs based on the formula NewTs=Ts-Amp*Ts.

[0042] Wait for user response. If no user operation is detected within the preset time period W, increment the emergency counter Ecnt. Track the number of unresponded times using the formula Ecnt = Ecnt + 1.

[0043] If Ecnt reaches the threshold Eth, the air fryer's set temperature will be automatically reduced.

[0044] On the other hand, the present invention proposes an over-temperature alarm system for an air fryer, comprising:

[0045] The startup and initial setup module is used to start the air fryer and set initial cooking parameters, and calculate a safe operating range based on the initial parameters;

[0046] The 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, timing is started to determine the duration of over-temperature.

[0047] The risk assessment and early warning preparation module is used to calculate a risk coefficient based on the duration of the overheating and the value exceeding the safe operating range, compare the risk coefficient with a preset threshold, and assess whether there is a potential hazard.

[0048] The warning and user interaction module is used to activate a warning signal when the risk coefficient exceeds the preset threshold, and prompt the user to check and adjust the settings parameters of the air fryer through the warning signal.

[0049] Technical effects and advantages of the present invention: The over-temperature alarm method and system for air fryers proposed in this invention have the following advantages compared with the prior art:

[0050] This invention monitors the actual operating temperature of the air fryer in real time, intelligently analyzes whether it exceeds the safe operating range, and calculates a risk coefficient based on the duration of overheating and the value exceeding the safe operating range, thereby effectively assessing potential hazards. Once a high-risk situation is detected, the system will activate an early warning signal and prompt the user to check and adjust the settings. This method not only improves the safety of equipment use but also detects potential overheating risks without the user's awareness, providing timely guidance to help the user quickly take corrective measures and avoid equipment damage or safety accidents caused by improper use, significantly enhancing the user experience and the safety and reliability of the equipment. Attached Figure Description

[0051] Figure 1 This is a flowchart of an over-temperature alarm method for an air fryer according to the present invention;

[0052] Figure 2 This is a block diagram of an over-temperature alarm system for an air fryer according to the present invention. Detailed Implementation

[0053] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The specific embodiments described herein are merely used to explain the present invention and are not intended to limit the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0054] This invention provides, for example Figure 1 The method shown here is an over-temperature alarm for an air fryer. It can monitor the actual operating temperature of the air fryer in real time, intelligently analyze whether it exceeds the safe operating range, and calculate a risk coefficient based on the duration of the over-temperature and the value exceeding the safe operating range, thereby effectively assessing potential hazards. Once a high-risk situation is detected, the system will activate a warning signal and prompt the user to check and adjust the settings. Specifically:

[0055] In this embodiment, the over-temperature alarm method for an air fryer includes the following steps:

[0056] Step 1: Start the air fryer and set the initial cooking parameters; specifically including:

[0057] The user can input the initial temperature Ts and cooking time ts0 through the air fryer's control panel; this allows users to set cooking parameters according to their needs, while also providing basic data for subsequent safety assessments.

[0058] Based on the initial temperature Ts, the recommended upper limit of the safe operating range is calculated as Ts + ΔTs, where ΔTs = K × (Tm - Ts), K is set to 0.1, ΔTs is the safety margin, and Tm is the maximum withstand temperature of the air fryer's heating element. This formula is used to calculate a safety margin ΔTs based on the difference between the user-set initial temperature Ts and the device's maximum withstand temperature Tm. K is an empirical coefficient used to ensure additional safety margin without approaching the limit. This ensures that the user-set temperature does not get too close to the maximum withstand temperature Tm of the air fryer's heating element, thereby reducing the risk of overheating. Assuming Tm is 250℃ and the user-set Ts is 200℃, then ΔTs = 0.1 × (250 - 200) = 5℃. Therefore, the recommended upper limit of the safe operating range is 205℃ (i.e., 200℃ + 5℃).

[0059] The initial temperature Ts and cooking time ts0 are compared with the safe operating range. If Ts exceeds the range, an adjustment prompt is displayed on the control panel to guide the user to re-enter the temperature value until the safety conditions are met. Real-time feedback is provided to ensure the safety of the user's settings, preventing potential dangers caused by misoperation and improving user safety.

[0060] If the user-defined temperature Ts plus ΔTs exceeds Tm, the user should be prompted to reset the temperature. For example, if the user tries to set Ts to 246℃, even after adding ΔTs (246℃ + 5℃ = 251℃), it will still exceed Tm (250℃), and the system should prompt the user to reset the temperature.

[0061] Save the final confirmed initial temperature Ts and cooking time to the air fryer's log file. Recording user settings facilitates subsequent analysis and tracking, aiding in troubleshooting and improving user experience. For example, if the user ultimately confirms Ts as 200℃ and ts0 as 30 minutes after adjustments, this data will be saved to the log file for later querying or data analysis.

[0062] Step 2: Calculate a safe operating range based on the initial parameters; specifically including:

[0063] The initial temperature Ts input on the control panel is obtained. Based on this initial temperature Ts, the material's thermal stability influence coefficient M is determined using the formula M = 1 + 0.05 * (Tm - Ts). The coefficient is adjusted according to the user-set temperature to ensure more accurate safety assessment and avoid risks caused by performance degradation due to high temperatures. For example, assuming Tm is 250℃ and the user sets Ts to 200℃, then M = 1 + 0.05 * (250 - 200) = 1 + 2.5 = 3.5.

[0064] Using the influence coefficient M and the initial temperature Ts, the lower limit of the safe operating range Tmin is calculated using the formula Tmin = Ts - M * ΔTs; this formula is used to calculate the lower limit of the safe operating range Tmin. By subtracting the safety margin ΔTs (calculated in step one) weighted by the material thermal stability influence coefficient M, a reasonable minimum operating temperature can be obtained, ensuring that it will not be too low even when considering the material's thermal stability.

[0065] Ensure that the user-set temperature does not fall below the minimum temperature required for the device to operate normally, preventing food from being undercooked or the device from malfunctioning due to excessively low temperatures. Assuming ΔTs is 5℃ (as mentioned above), then Tmin = 200 - 3.5 * 5 = 200 - 17.5 = 182.5℃.

[0066] Set the upper limit of the safe operating range to Tmax, and save Tmin and Tmax to the air fryer's log file. Recording the upper and lower limits 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℃ (i.e., the maximum withstand temperature of the heating element), save Tmin (182.5℃) and Tmax (250℃) to the log file for later querying or analysis.

[0067] Step 3: Monitor whether the actual operating temperature of the air fryer exceeds the safe operating range; specifically including:

[0068] The actual operating temperature Ta inside the air fryer is collected in real time by a temperature sensor. The actual operating temperature Ta is compared with the lower limit Tmin and upper limit Tmax of the safe operating range saved in the log file. This ensures that the working status of the air fryer can be monitored in real time, and any overheating situation can be detected and responded to in a timely manner to prevent potential safety hazards.

[0069] Calculate the excess 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 degree of deviation of the actual operating temperature Ta from the safe operating range.

[0070] By calculating the excess percentage P, the degree to which the current temperature deviates from the safe range can be assessed more accurately, which is helpful for subsequent risk assessment and early warning mechanisms. Assuming Tmin is 182.5℃ and Tmax is 250℃, if the actual operating temperature Ta is 260℃, then P = (260-250) / 250*100% = 4%. If Ta is 175℃, then P = (182.5-175) / 182.5*100% = 4.11%.

[0071] When the value of the ratio P exceeds the preset threshold L, the current state is marked as abnormal, and the actual operating temperature Ta and timestamp are recorded in the air fryer's log file. By setting the threshold L, it is determined whether a warning or further safety measures need to be triggered, ensuring a timely response in the event of potential risks and protecting the safety of users and equipment.

[0072] Assuming the preset threshold L is 5%, if the actual operating temperature Ta is 260℃ (as calculated above, P=4%), it will not be marked as abnormal. However, if Ta rises to 275℃, then P=(275-250) / 250*100%=10%, exceeding the threshold L. The system will then mark the current state as abnormal and record the actual operating temperature Ta (275℃) and timestamp in the log file.

[0073] Step 4: If the actual operating temperature exceeds the safe operating range, start timing to determine the duration of the over-temperature; specifically including:

[0074] When the actual operating temperature Ta is detected to exceed the safe operating range, the current time is recorded as t1;

[0075] The actual operating temperature Ta is continuously monitored until it returns to the safe operating range, and the time is recorded as t2. The overheating duration Δta is calculated using the formula Δta = t2 - t1. This formula is used to calculate the overheating duration Δta. By comparing the two timestamps (t1 and t2), the duration for which the air fryer is outside the safe operating range can be obtained. Accurately measuring the duration of the overheating event helps assess the severity of the event and provides data support for further risk assessment. Assuming t1 is 14:35 and t2 is 14:40, then Δta = t2 - t1 = 5 minutes.

[0076] If the Δta exceeds a preset time threshold Td, the overheating event is marked as severe, and the risk assessment level Ra is updated based on the value of the proportion P and the Δta, using the formula Ra = P * Td / Δta. By combining the relationship between the excess proportion P, the overheating duration Δta, and the preset time threshold Td, the risk level of the overheating event can be quantified. A larger Rc value indicates a higher risk.

[0077] Risk is comprehensively assessed based on the duration and degree of temperature exceedance to ensure the identification of truly severe temperature exceedance events and to take appropriate measures to mitigate the risk. Assuming a preset time threshold Td of 3 minutes, an exceedance rate P of 10% (as mentioned earlier, Ta = 275℃, Tmax = 250℃), and a temperature exceedance duration Δta of 5 minutes, then Ra = P * Td / Δta = 10% * 3 / 5 = 6%. Since Δta exceeds Td (5 minutes > 3 minutes), the temperature exceedance event is marked as severe.

[0078] Step 5: Calculate the risk factor based on the duration of the overheating and the value exceeding the safe operating range; specifically including:

[0079] Obtain the overheating duration Δta and the degree to which the actual operating temperature Ta exceeds the safe operating range P;

[0080] Based on the P value and Δta, the preliminary risk coefficient Cf is calculated using the formula Cf=PΔta. By combining the excess ratio P (representing the degree of temperature deviation) and the over-temperature duration Δta, a preliminary risk assessment value can be obtained. A larger Cf value indicates a higher potential risk. Assuming the excess ratio P is 10% (as mentioned above, Ta=275℃, Tmax=250℃) and the over-temperature duration Δta is 5 minutes, then Cf=P*Δta=10%*5=0.5.

[0081] A correction factor F, determined based on the heat resistance of the materials used in the air fryer, is introduced and adjusted using the formula F = 1 - (0.01(Ta - Tmax)). As the actual operating temperature Ta approaches or exceeds the maximum withstand temperature Tmax, the correction factor F gradually decreases, indicating a reduction in the material's stability at high temperatures. By considering the impact of material heat resistance, risk assessment becomes more accurate, avoiding additional risks caused by degraded material performance. Assuming the actual operating temperature Ta is 275℃ and the maximum withstand temperature Tmax is 250℃, then F = 1 - (0.01 * (275 - 250)) = 1 - 0.25 = 0.75.

[0082] The initial risk coefficient Cf is combined with the correction factor F, and the final risk coefficient Rc is calculated using the formula Rc = Cf / F. Dividing the initial risk coefficient Cf by the correction factor F yields a risk assessment value adjusted for material heat resistance. A larger Rc value indicates a higher risk. A comprehensive risk assessment, taking into account the degree of temperature deviation, duration, and material heat resistance, helps in developing effective countermeasures.

[0083] For example, if Cf is 0.5 and F is 0.75, then Rc = Cf / F = 0.5 / 0.75 = 0.67.

[0084] Through the steps described above, the air fryer can calculate a risk factor based on the duration of overheating and the degree to which it exceeds safe operating limits, and adjust this factor by incorporating a correction factor based on the material's heat resistance. This method not only improves the ability to identify potential hazards but also ensures accurate risk assessments under various conditions.

[0085] Step Six: Compare the risk coefficient with the preset threshold to assess whether there are any potential hazards; specifically including:

[0086] Obtain the final risk coefficient Rc; determine the preset risk threshold Rth based on the air fryer's safety standards and material tolerance limits; set a safety limit to determine whether the current risk requires triggering an early warning or taking further measures. Rth reflects the maximum acceptable risk level of the equipment under normal operating conditions.

[0087] The final risk coefficient Rc is compared with the risk threshold Rth, and the difference Dif is calculated using the formula Dif=Rc-Rth; a positive value indicates that the current risk exceeds the preset safety limit, while a negative value or zero indicates that the risk is within an acceptable range.

[0088] 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 Dif value, determined using the formula Lv=1+Int(Dif / 5). The warning level is dynamically adjusted based on the degree to which the risk threshold is exceeded, ensuring that appropriate countermeasures can be taken for different levels of risk, thus improving response efficiency. Assume a certain over-temperature event:

[0089] The actual operating temperature Ta is 275℃, and Tmax is 250℃;

[0090] The duration of the overheating, Δta, is 5 minutes.

[0091] The risk threshold Rth is set to 0.5.

[0092] Based on the above steps:

[0093] Calculate the excess percentage P: P = (275 - 250) / 250 * 100% = 10%;

[0094] Preliminary risk coefficient Cf: Cf = P * Δta = 10% * 5 = 0.5;

[0095] Correction factor F: F = 1 - (0.01 * (275 - 250)) = 0.75;

[0096] Final risk coefficient Rc: Rc = Cf / F = 0.5 / 0.75 = 0.67;

[0097] Difference Dif: Dif = Rc - Rth = 0.67 - 0.5 = 0.17;

[0098] Warning level Lv: Lv=1+Int(0.17 / 5)=1+0=1.

[0099] Through these steps, the air fryer can accurately assess the risk level of overheating events and adjust the warning level accordingly. This not only improves system safety but also ensures that users receive timely notification and guidance when encountering potential risks.

[0100] Step 7: When the risk coefficient exceeds the preset threshold, activate the warning signal; specifically including:

[0101] Check whether the difference value 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 that there is a high risk and further measures need to be taken.

[0102] If the Dif value is greater than 0, the warning signal type is determined based on the warning level Lv, and the warning method is selected using the formula Type = 2 * Lv - 1; for example, sound alarm, visual cue, etc. A larger Lv value will result in a larger Type value, indicating a more urgent warning method.

[0103] The corresponding early warning mechanism is activated based on the Type value. If Type equals 3, an audible alarm is triggered, and the current status and timestamp are recorded in the log file. Through different types of early warning mechanisms (such as audible alarms, visual cues, etc.), the user is promptly notified of the current risks, and relevant information is recorded for subsequent analysis and investigation.

[0104] An incrementing counter Cnt is added, and the number of consecutive warnings is tracked using the formula Cnt = Cnt + 1. By tracking the number of consecutive warnings, 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 equipment and the user. When Cnt reaches the preset maximum number of consecutive warnings Mc, the power to the air fryer is disconnected to prevent damage to the equipment due to continuous high temperatures or to prevent safety accidents, ensuring the safety of the user and the equipment.

[0105] Suppose that in a certain overheating event:

[0106] The final risk coefficient Rc is 0.67, and the risk threshold Rth is 0.5.

[0107] The difference value (Dif) is 0.17, and the warning level (Lv) is 1.

[0108] The preset maximum number of consecutive warnings Mc is 3.

[0109] Based on the above steps:

[0110] Confirm whether the risk threshold is exceeded: Dif=0.17>0 indicates that Rc exceeds Rth.

[0111] Determine the warning signal type: Type = 2 * Lv - 1 = 2 * 1 - 1 = 1 (assuming Lv is 1, Type is 1; if Lv is 2, then Type is 3).

[0112] Activate the corresponding early warning mechanism: If Type is 3, trigger an audible alarm and record the current status and timestamp to the log file.

[0113] Track the number of consecutive warnings: The initial Cnt is 0. After the first warning is triggered, Cnt = 0 + 1 = 1.

[0114] Implement additional safety measures: If the warning is triggered three times consecutively (Cnt reaches 3), the system will automatically disconnect the power to the air fryer.

[0115] Through these steps, the air fryer can automatically activate a warning signal when a high risk is detected, and take further safety measures based on the number of consecutive warnings.

[0116] Step 8: The warning signal prompts the user to check and adjust the air fryer's settings; specifically including:

[0117] After the alarm sounds, the recommended adjustment range Amp is calculated based on the final risk factor Rc and the current settings, using the formula Amp = Rc / 10. This formula calculates the recommended adjustment range Amp based on the final risk factor Rc. Amp represents the proportion of 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.

[0118] The air fryer's display shows warning messages and suggested adjustments, including specific values ​​for lowering the temperature or shortening the cooking time. The new target temperature, NewTs, is calculated using the formula NewTs = Ts - Amp * Ts. Based on the user-set initial temperature Ts and the suggested adjustment amount Amp, an adjusted safe temperature can be obtained. Reducing the initial temperature lowers the risk.

[0119] Waiting for user response, if no user action is detected within the preset time period W, the emergency counter Ecnt is incremented. The number of unresponsive events is tracked using the formula Ecnt = Ecnt + 1. By setting the preset time period W, the system can automatically record the number of unresponsive events when the user does not respond in a timely manner, ensuring that further security measures are taken after multiple unresponsive events to avoid potential risks.

[0120] If the Ecnt reaches the threshold Eth, the air fryer's set temperature will be automatically reduced to ensure that the equipment is not damaged or causes a safety accident due to continuous high temperature.

[0121] Suppose that in a certain overheating event:

[0122] The final risk coefficient Rc is 0.67;

[0123] The initial set temperature Ts is 200℃;

[0124] The preset time period W is 5 minutes;

[0125] The emergency counter Ecnt is initially set to 0, and the maximum number of unresponsive events Eth is 3.

[0126] Based on the above steps:

[0127] The suggested adjustment range is calculated as follows: Amp = Rc / 10 = 0.67 / 10 = 0.067.

[0128] Display warning messages and suggested adjustments:

[0129] NewTs=Ts-Amp*Ts=200-0.067*200=186.6℃.

[0130] The display shows a warning message: "High temperature risk detected. Please adjust the temperature to 186.6℃."

[0131] Wait for user response. If no user action is detected within 5 minutes, increment the emergency counter Ecnt: initially Ecnt is 0, and after the first no response, Ecnt = Ecnt + 1 = 0 + 1 = 1.

[0132] If there is no response for three consecutive times (Ecnt reaches 3), the set temperature will be automatically lowered to 186.6℃.

[0133] Through these steps, the air fryer can provide users with specific adjustment suggestions when a high risk is detected, and automatically take measures if the user does not respond in a timely manner.

[0134] In addition, this invention proposes an over-temperature alarm system for an air fryer, such as... Figure 2 As shown, it includes:

[0135] The startup and initial setup module is used to start the air fryer and set initial cooking parameters, and calculate a safe operating range based on the initial parameters;

[0136] The 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, timing is started to determine the duration of over-temperature.

[0137] The risk assessment and early warning preparation module is used to calculate a risk coefficient based on the duration of the overheating and the value exceeding the safe operating range, compare the risk coefficient with a preset threshold, and assess whether there is a potential hazard.

[0138] The warning and user interaction module is used to activate a warning signal when the risk coefficient exceeds the preset threshold, and prompt the user to check and adjust the settings parameters of the air fryer through the warning signal.

[0139] In addition, the modules mentioned above are also used to implement other steps of the above-mentioned air fryer over-temperature alarm method, which will not be described in detail here.

[0140] In summary, by monitoring the actual operating temperature of the air fryer in real time, the system intelligently analyzes whether the safe operating range has been exceeded and calculates the risk coefficient based on the duration of overheating and the value exceeding the safe operating range, thereby effectively assessing potential dangers. Once a high-risk situation is detected, the system will activate an early warning signal and prompt the user to check and adjust the settings.

[0141] This approach not only improves the safety of device use, but also detects potential overheating risks without the user's awareness, providing timely guidance to help the user take corrective action quickly and avoid device damage or safety accidents caused by improper use, significantly enhancing the user experience and the safety and reliability of the device.

[0142] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended 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 make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An over-temperature alarm method for an air fryer, characterized in that, Includes the following steps: Start the air fryer and set the initial cooking parameters, then calculate a safe operating range based on those 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 duration of the overheating. Based on the duration of the overheating and the value exceeding the safe operating range, a risk coefficient is calculated, and the risk coefficient is compared with a preset threshold to assess whether there is a potential hazard. When the risk factor exceeds the preset threshold, an early warning signal is activated to prompt the user to check and adjust the settings of the air fryer. The process 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 withstand temperature of the air fryer heating element. The initial temperature Ts and cooking time ts0 are compared with the safe operating range. If Ts exceeds the range, an adjustment prompt is displayed on the control panel to guide the user to re-enter the temperature value until the safety conditions are met. Save the final confirmed initial temperature Ts and cooking time to the air fryer's log file.

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

3. The over-temperature alarm method for an air fryer according to claim 2, 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 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) / 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, the current state is marked as abnormal, and the actual operating temperature Ta and timestamp are recorded in the air fryer's log file.

4. The over-temperature alarm method for an air fryer according to claim 3, characterized in that, If the actual operating temperature exceeds the safe operating range, a timer is started to determine the duration of the over-temperature, including: When the actual operating temperature Ta is detected to exceed the safe operating range, the current time is recorded as t1; The actual operating temperature Ta is continuously monitored until it returns to the safe operating range. The time is recorded as t2. The over-temperature duration Δta is calculated using 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 Ra is updated according to the value of the ratio P and the Δta. The risk assessment level Ra is adjusted using the formula Ra=P*Td / Δta.

5. The over-temperature alarm method for an air fryer according to claim 4, characterized in that, Based on the duration of the overheating and the value exceeding the safe operating range, a risk factor is calculated, including: Obtain the overheating duration Δta and the degree to which the actual operating temperature Ta exceeds the safe operating range P; Based on the P value and the Δta, the preliminary risk coefficient Cf is calculated using the formula Cf=PΔta; A correction factor F, determined based on the heat resistance of the materials used in the air fryer, is introduced and adjusted using the formula F=1-(0.01(Ta-Tmax)). The initial risk coefficient Cf is then combined with the correction factor F, and the final risk coefficient Rc is calculated using the formula Rc=Cf / F.

6. The over-temperature alarm method for an air fryer according to claim 5, characterized in that, By comparing the risk coefficient with a preset threshold, an assessment is made to determine whether there is a potential hazard, including: Obtain the final risk coefficient Rc; A preset risk threshold Rth is determined based on the safety standards and material tolerance limits of air fryers; The final risk coefficient Rc is compared with the risk threshold Rth, and the difference Dif is calculated using 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 Dif value, which is determined by the formula Lv=1+Int(Dif / 5).

7. The over-temperature alarm method for an air fryer according to claim 6, characterized in that, When the risk coefficient 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 method is selected by the formula Type=2*Lv-1; The corresponding early warning mechanism is activated based on the Type value. If Type equals 3, an audible alarm is triggered, and the current status and timestamp are recorded in the log file. An incrementing counter Cnt is added, and the number of consecutive warnings is tracked by the formula Cnt = Cnt + 1. When Cnt reaches the preset maximum number of consecutive warnings Mc, the power to the air fryer is disconnected.

8. The over-temperature alarm method for an air fryer according to claim 7, characterized in that, The warning signal prompts the user to check and adjust the air fryer's settings, including: After the alarm is issued, the recommended adjustment range Amp is calculated and determined using the formula Amp=Rc / 10 based on the final risk coefficient Rc and the current setting parameters. The air fryer displays warning messages and suggested adjustments, including specific values ​​for lowering the temperature or shortening the cooking time, and calculates the new target temperature NewTs based on the formula NewTs=Ts-Amp*Ts. Wait for user response. If no user operation is detected within the preset time period W, increment the emergency counter Ecnt. Track the number of unresponded times using the formula Ecnt = Ecnt + 1. If Ecnt reaches the threshold Eth, the air fryer's set temperature will be automatically reduced.

9. An over-temperature alarm system for an air fryer implementing the method of any one of claims 1-8, characterized in that, include: The startup and initial setup module is used to start the air fryer and set initial cooking parameters, and calculate a safe operating range based on these parameters. This includes: inputting the initial temperature Ts and cooking time ts0 through the air fryer's control panel; calculating the recommended upper limit of the safe operating range as Ts + ΔTs based on the initial temperature Ts, where ΔTs = K × (Tm - Ts), K is 0.1, ΔTs is the safety margin, and Tm is the maximum withstand temperature of the air fryer's heating element; comparing the initial temperature Ts and cooking time ts0 with the safe operating range; if Ts exceeds the range, displaying adjustment prompts on the control panel to guide the user to re-enter the temperature value until the safety conditions are met; and saving the final confirmed initial temperature Ts and cooking time to the air fryer's log file. The 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, timing is started to determine the duration of over-temperature. The risk assessment and early warning preparation module is used to calculate a risk coefficient based on the duration of the overheating and the value exceeding the safe operating range, compare the risk coefficient with a preset threshold, and assess whether there is a potential hazard. The warning and user interaction module is used to activate a warning signal when the risk coefficient exceeds the preset threshold, and prompt the user to check and adjust the settings parameters of the air fryer through the warning signal.

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