Method for diagnosing malfunction of air fryer fan

Abstract

This application relates to a method for diagnosing faults in an air fryer fan. The method includes: acquiring the initial temperature and current temperature inside the air fryer during a detection period; and determining the operating status of a fan located on the top of the air fryer based on the temperature difference between the current and initial temperatures and a temperature rise threshold corresponding to the detection period. If the temperature difference exceeds the temperature rise threshold, the fan is determined to be in an abnormal operating state. This method can improve the accuracy of fault diagnosis for air fryer fans.

Description

Technical Field

[0001] This application relates to the field of fault diagnosis technology for household appliances, and in particular to a fault diagnosis method, device, air fryer, storage medium, and computer program product for an air fryer fan. Background Technology

[0002] Air fryers primarily use hot air instead of hot oil to heat food inside the fryer. A fan at the top of the fryer blows air downwards, heating it through the heating elements. This heated air then cooks the food in the frying basket at the bottom. Therefore, the fan's performance significantly impacts the air fryer's operation. If the fan malfunctions, the heat from the heating elements will rise directly, and excessively high temperatures can affect the performance and lifespan of other components located above the fryer, potentially even posing a fire hazard. Therefore, it is essential to regularly diagnose and malfunction the air fryer's fan.

[0003] In related technologies, fan malfunctions are usually diagnosed by detecting the fan's operating current. However, the maximum power of the fan used in air fryers is usually around 35-45W, with a relatively low operating current. Furthermore, the current when the fan is stalled is not much different from the current when it is operating normally, which makes the accuracy of diagnosing air fryer fan malfunctions low. Summary of the Invention

[0004] Therefore, it is necessary to provide a fault diagnosis method for air fryer fans that can improve the accuracy of fault diagnosis, addressing the technical problem of low accuracy in diagnosing air fryer fan malfunctions.

[0005] The technical problem solved by this invention is to provide a method for diagnosing faults in air fryer fans, which can effectively improve the accuracy of fault diagnosis for air fryer fans.

[0006] The first technical problem mentioned above is solved by the following technical solution:

[0007] A method for diagnosing faults in an air fryer fan, the method comprising:

[0008] Obtain the initial and current temperatures inside the air fryer during the detection cycle;

[0009] Based on the temperature difference between the current temperature and the initial temperature, and the temperature rise threshold corresponding to the detection cycle, the working status of the fan installed on the top of the housing is determined. If the temperature difference is greater than the temperature rise threshold, the working status of the fan is determined to be abnormal.

[0010] The fault diagnosis method for air fryer fans described in this invention has the following advantages compared with the prior art: By acquiring the temperature inside the air fryer at different times, the temperature change inside the air fryer is obtained. Based on the temperature change inside the air fryer, the working status of the fan located on the top of the air fryer is judged. If the temperature difference is greater than the corresponding temperature rise threshold, it indicates that the temperature inside the air fryer is rising too fast, and thus the working status of the fan is abnormal. The fault diagnosis method for air fryer fans based on the above process improves the accuracy of fault diagnosis for air fryer fans.

[0011] In one embodiment, before the step of determining the working status of the fan located on the top of the housing based on the temperature difference between the current temperature and the initial temperature and the temperature rise threshold corresponding to the detection cycle, the method further includes: determining whether to enter the next detection cycle based on the current temperature and the initial temperature, wherein if the current temperature is not greater than the initial temperature, the next detection cycle is entered, and the current temperature is determined as the initial temperature of the next detection cycle, and the method returns to the step of obtaining the initial temperature and current temperature inside the air fryer housing within the detection cycle.

[0012] If the current temperature is not greater than the initial temperature, it means that the temperature change trend inside the chamber from the initial moment to the current moment is not an increase, but a decrease or heat preservation. This indicates that the working state of the air fryer has changed, such as the chamber being opened or entering the heat preservation stage. Therefore, it is necessary to enter the next detection cycle and re-determine the initial temperature, current temperature, and temperature rise threshold within the detection cycle, so as to judge the working state of the fan in the new detection cycle.

[0013] In one embodiment, if the current temperature is greater than the initial temperature, a determination is made on whether to enter the next detection cycle based on the time difference between the current time of obtaining the current temperature and the initial time of obtaining the initial temperature, and the duration corresponding to the detection cycle. If the time difference is greater than the duration corresponding to the detection cycle, the next detection cycle is entered, and the current temperature is determined as the initial temperature of the next detection cycle. The process then returns to the step of obtaining the initial temperature and current temperature inside the air fryer within the detection cycle.

[0014] If the time difference is greater than the duration of the detection cycle, it means that a long time has passed between the initial moment and the current moment. At this time, the temperature rise threshold is no longer sufficient to determine whether the temperature rise inside the enclosure from the initial moment to the current moment exceeds the normal temperature rise range. Therefore, it is necessary to enter the next detection cycle and redetermine the initial temperature, current temperature, and temperature rise threshold within the detection cycle, so as to determine the working status of the fan in the new detection cycle.

[0015] In one embodiment, if the current temperature is greater than the initial temperature and the time difference is not greater than the duration corresponding to the detection cycle, the working state of the fan is determined based on the temperature difference and the temperature rise threshold.

[0016] In one embodiment, determining the working state of the fan based on the temperature difference and the temperature rise threshold includes: if the temperature difference is not greater than the temperature rise threshold, then determining that the working state of the fan is normal, and returning to the step of obtaining the initial temperature and current temperature inside the air fryer during the detection period.

[0017] Based on the temperature difference, the actual temperature rise inside the chamber can be determined, and then the relationship between the actual temperature rise and the temperature rise threshold can be judged. If the actual temperature rise does not exceed the temperature rise threshold, it means that the temperature rise inside the chamber is still within the normal temperature rise range. Therefore, it can be determined that the fan is in normal condition. The initial temperature and current temperature inside the air fryer chamber during the detection cycle are obtained again, so as to cyclically judge the fan failure and thus realize the real-time failure judgment of the fan.

[0018] If the current temperature is not greater than the initial temperature or the time difference is not less than the duration corresponding to the detection cycle, by entering a new detection cycle, the current temperature is determined as the initial temperature under the new detection cycle, and the initial temperature and current temperature inside the air fryer during the detection cycle are re-acquired. This can avoid misjudgment caused by temperature drop or a long interval between the current time and the initial time, thereby improving the accuracy of fan fault diagnosis.

[0019] In one embodiment, the temperature rise threshold is determined by: determining a reference temperature rise of the temperature inside the chamber during the detection cycle based on a pre-established temperature rise relationship in the air fryer; the pre-established temperature rise relationship is used to characterize a reference mapping relationship between the temperature inside the chamber and the heating time of the air fryer; and the reference temperature rise is used as the temperature rise threshold corresponding to the detection cycle.

[0020] During the heating phase of an air fryer, the temperature inside the chamber does not change uniformly. Therefore, based on the temperature rise relationship, which characterizes the relationship between the temperature inside the chamber and the heating time of the air fryer, a reference temperature rise inside the chamber can be determined for different detection cycles. This allows us to obtain the temperature rise threshold corresponding to that detection cycle, i.e., the normal temperature rise range for that detection cycle. Based on the temperature rise threshold corresponding to that detection cycle, we can determine whether the actual temperature rise inside the chamber during that detection cycle is abnormal.

[0021] In one embodiment, the pre-established temperature rise relationship is established by: obtaining a first mapping relationship between the temperature inside the chamber and the heating time of the air fryer under the first heating condition where the fan is working normally; taking the product of the first preset coefficient and the first mapping relationship as the temperature rise relationship corresponding to the air fryer; the first preset coefficient is greater than 1; wherein, under the first heating condition, the first voltage applied to the air fryer is greater than the standard voltage corresponding to the air fryer.

[0022] On the one hand, by setting the first heating condition to an applied first voltage greater than the standard voltage and the fan operating normally, a first mapping relationship characterizing the fastest theoretical temperature rise inside the chamber can be obtained under the first heating condition where the fan is operating normally. On the other hand, by using the product of a first preset coefficient greater than 1 and the first mapping relationship as the temperature rise relationship in the air fryer, the normal temperature rise range inside the chamber can be made slightly greater than the theoretical temperature rise, thereby avoiding misjudgment of fan malfunction.

[0023] In one embodiment, the pre-established temperature rise relationship is obtained by: acquiring a first mapping relationship between the temperature inside the chamber and the heating time of the air fryer under a first heating condition where the fan is working normally, and acquiring a second mapping relationship between the temperature inside the chamber and the heating time of the air fryer under a second heating condition where the fan stops working; and obtaining the temperature rise relationship corresponding to the air fryer based on the first mapping relationship and the second mapping relationship.

[0024] By obtaining a first mapping relationship characterizing the temperature rise inside the chamber under the first heating condition when the fan is working normally, and a second mapping relationship characterizing the temperature rise inside the chamber under the second heating condition when the fan is not working, the theoretical temperature rise inside the chamber under the conditions of normal fan operation and fan shutdown can be determined respectively. Therefore, furthermore, the temperature rise relationship in the air fryer can be obtained by comprehensively considering the theoretical temperature rise under the conditions of normal fan operation and fan shutdown.

[0025] In one embodiment, obtaining the temperature rise relationship corresponding to the air fryer based on the first mapping relationship and the second mapping relationship includes: fusing the first mapping relationship and the second mapping relationship to obtain a fused mapping relationship; taking the product between the second preset coefficient and the fused mapping relationship as the temperature rise relationship corresponding to the air fryer; the second preset coefficient is less than 1.

[0026] By using the product of a second preset coefficient less than 1 and the fusion mapping relationship corresponding to the first and second mapping relationships as the temperature rise relationship in the air fryer, the normal temperature rise range inside the fryer can be made slightly greater than the theoretical temperature rise when the fan is working normally, and slightly less than the theoretical temperature rise when the fan stops working, thereby avoiding misjudgment of fan failure.

[0027] In one embodiment, under the first heating condition, a first voltage applied to the air fryer is greater than the standard voltage corresponding to the air fryer, and under the second heating condition, a second voltage applied to the air fryer is equal to the standard voltage.

[0028] By further setting the first voltage corresponding to the first heating condition to a voltage greater than the standard voltage, and setting the second voltage corresponding to the second heating condition to a voltage equal to the standard voltage, the first mapping relationship can be made to characterize the fastest theoretical temperature rise inside the enclosure when the fan is working normally, and the second relationship can be made to characterize the slowest theoretical temperature rise inside the enclosure when the fan stops working.

[0029] In one embodiment, the method further includes: if the fan is in an abnormal operating state, or the current temperature is greater than or equal to the target temperature corresponding to the air fryer, then the fault judgment of the fan is terminated.

[0030] In one embodiment, the method further includes: if the fan is in an abnormal operating state, then shutting off the heating element inside the housing and providing a notification of the abnormal fan status.

[0031] In the event of a fan malfunction, shutting off the heating element inside the enclosure and issuing a warning can prevent other components from being affected by high temperatures and avoid dangerous situations such as fires.

[0032] In one embodiment, the method further includes: after the air fryer is powered on, detecting the temperature inside the air fryer in real time, and using the temperature inside the air fryer when the air fryer is first powered on or just started heating as the initial temperature for the first detection cycle. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments or related technologies of this application, the drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1This is a flowchart illustrating a method for diagnosing a fault in an air fryer fan, as shown in one embodiment.

[0035] Figure 2 This is a flowchart illustrating the steps for determining the temperature rise threshold corresponding to the detection cycle in one embodiment.

[0036] Figure 3 This is a flowchart illustrating the steps for establishing the temperature rise relationship corresponding to an air fryer in one embodiment.

[0037] Figure 4 This is a flowchart illustrating the steps for establishing the temperature rise relationship corresponding to the air fryer in another embodiment;

[0038] Figure 5 This is a flowchart illustrating the steps of obtaining the temperature rise relationship of an air fryer based on a first mapping relationship and a second mapping relationship in one embodiment.

[0039] Figure 6 This is a flow diagram of a first mapping function under a first heating condition, a second mapping function under a second heating condition, and a temperature rise mapping function corresponding to the temperature rise relationship in one embodiment;

[0040] Figure 7 This is a flowchart illustrating a method for diagnosing air fryer fan malfunctions in another embodiment.

[0041] Figure 8 This is a flowchart illustrating a method for detecting the fan of an air fryer in one embodiment;

[0042] Figure 9 This is a structural block diagram of a fault diagnosis device for an air fryer fan in one embodiment;

[0043] Figure 10 This is an internal structural diagram of a computer device in one embodiment. Detailed Implementation

[0044] 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.

[0045] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, data stored, data displayed, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties, and the collection, use and processing of related data must comply with the relevant laws, regulations and standards of the relevant countries and regions.

[0046] In one exemplary embodiment, such as Figure 1 As shown, a method for diagnosing air fryer fan malfunctions is provided. This embodiment uses the method applied to an air fryer as an example. It is understood that the air fryer contains a processor for data processing and a memory for data storage. In this embodiment, the method includes the following steps:

[0047] Step S102: Obtain the initial temperature and current temperature of the air fryer's interior during the detection cycle.

[0048] The air fryer is equipped with a temperature sensor, such as a temperature probe, inside its casing. The temperature sensor can detect the temperature inside the casing in real time, thereby enabling temperature control of the air fryer.

[0049] The initial temperature is the temperature at the beginning of the detection cycle, and the current time is later than the initial time.

[0050] Specifically, the air fryer uses a temperature sensor inside the chamber to detect the temperature in real time and stores the detected temperature and the time of detection as a detection record in the memory; therefore, the air fryer can obtain the initial temperature and the current temperature inside the air fryer during the detection period based on the detection record of the temperature sensor.

[0051] For example, a temperature sensor monitors the temperature inside the chamber in real time and records the acquired temperature value. With time to obtain temperature The detection record is stored in the memory; therefore, the air fryer can obtain the initial temperature and current temperature inside the chamber during the detection cycle based on the detection record in the memory.

[0052] Step S104: Based on the temperature difference between the current temperature and the initial temperature, and the temperature rise threshold corresponding to the detection cycle, determine the working status of the fan set on the top of the enclosure.

[0053] If the temperature difference is greater than the temperature rise threshold, the fan is determined to be in an abnormal operating state.

[0054] The temperature difference between the current temperature and the initial temperature characterizes the temperature change within the chamber from the beginning of the detection cycle to the current time. The temperature difference is calculated by subtracting the initial temperature from the current temperature. The current temperature is denoted as... The initial temperature is That is, temperature difference .

[0055] The temperature rise threshold is used to characterize the normal temperature rise range inside the chamber during the testing cycle. It should be noted that during the heating phase of the air fryer, the temperature inside the chamber does not change uniformly. Therefore, the temperature rise threshold is different for different testing cycles.

[0056] The fan's operating status includes normal status and abnormal status; the normal status indicates that the fan is not malfunctioning, while the abnormal status indicates that the fan is malfunctioning.

[0057] Specifically, the air fryer calculates the temperature difference between the current temperature and the initial temperature to obtain the temperature change inside the chamber from the beginning of the detection cycle to the current time. Then, the server judges the working status of the fan set on the top of the chamber based on the temperature change inside the chamber from the beginning of the detection cycle to the current time and the temperature rise threshold corresponding to the detection cycle.

[0058] For example, if the temperature difference between the current temperature and the initial temperature is greater than the temperature rise threshold corresponding to the detection cycle, it means that the temperature rise from the beginning of the detection cycle to the current time exceeds the normal temperature rise range starting from the initial temperature at the initial time, and thus the fan's working state is judged to be abnormal, such as the fan stopping working; if the temperature difference between the current temperature and the initial temperature is not greater than the temperature rise threshold corresponding to the detection cycle, it means that the temperature rise from the beginning of the detection cycle to the current time is still within the normal temperature rise range starting from the initial temperature at the initial time, and thus the fan's working state is judged to be normal.

[0059] In the above-mentioned air fryer fan fault diagnosis method, the temperature inside the chamber is obtained at different times to obtain the temperature change inside the chamber. Based on the temperature change inside the chamber, the working status of the fan installed on the top of the chamber is judged. If the temperature difference is greater than the corresponding temperature rise threshold, it indicates that the temperature inside the chamber is rising too fast, and thus the working status of the fan is abnormal. The air fryer fan fault diagnosis method based on the above process improves the accuracy of air fryer fan fault diagnosis.

[0060] In addition, since air fryers need to heat food according to the set target temperature, a temperature sensor is installed inside the fryer. By obtaining the temperature inside the fryer through the temperature sensor, on the one hand, the structure of the air fryer itself can be fully utilized to diagnose fan malfunctions without adding extra hardware, reducing the cost and difficulty of diagnosis; on the other hand, the high sensitivity of the temperature sensor to temperature changes can improve the accuracy of diagnosing fan malfunctions.

[0061] In an exemplary embodiment, before step S104 above, the following is also included: determining whether to enter the next detection cycle based on the current temperature and the initial temperature.

[0062] If the current temperature is not greater than the initial temperature, the process proceeds to the next detection cycle, and the current temperature is set as the initial temperature for the next detection cycle. The process then returns to the step of obtaining the initial and current temperatures of the air fryer's interior during the detection cycle.

[0063] Specifically, it's understandable that users might open the air fryer to check the food's heating or flip it while using it. This causes the temperature inside the fryer to drop. If the fan's operating status is still judged using the original temperature rise threshold, it might lead to misjudgment. For example, if the initial temperature is 50℃ and the corresponding temperature rise threshold is 25℃, and the user opens the fryer, bringing the current temperature to 40℃, a fan malfunction could cause the temperature to rise rapidly from 40℃ to 70℃. However, since the temperature difference between 50℃ and 70℃ is less than the 25℃ temperature rise threshold, the air fryer won't detect a fan malfunction, resulting in a misjudgment. For example, because the temperature inside an air fryer does not change uniformly during the heating phase, different temperature rise thresholds are applied to detection cycles starting from different initial temperatures. For instance, the temperature rise threshold for a detection cycle starting at 20°C is 40°C, and the threshold for a detection cycle starting at 50°C is 25°C. If the initial temperature is 50°C, and the user opens the fryer to 20°C, the temperature inside the fryer will rise rapidly to 50°C due to the faster heating speed at low temperatures. However, the temperature rise from 20°C to 50°C is less than the temperature rise threshold of 40°C, so the fan is not actually malfunctioning. But if the temperature rise threshold of 25°C is used for judgment, it will be mistakenly judged that the fan is malfunctioning.

[0064] Therefore, if the current temperature is not greater than (i.e. less than or equal to) the initial temperature, continuing to use the temperature rise threshold and initial temperature corresponding to the original detection cycle to determine the fan's fault may result in a misjudgment. To avoid this, the air fryer needs to enter a new detection cycle, determine the current temperature as the initial temperature of the new detection cycle, and return to the step of obtaining the initial temperature and current temperature inside the air fryer's chamber during the detection cycle. This will allow the air fryer to obtain the initial temperature inside the chamber during the new detection cycle and the latest current temperature detected by the temperature sensor, and continue to determine the fan's operating status.

[0065] For example, starting from the initial moment, the initial temperature is denoted as... The cumulative time at the current moment is recorded as The current temperature is recorded as So, the air fryer has a temperature difference In this case, a new detection cycle begins, and the current temperature is set as the initial temperature for the new detection cycle. Therefore, the timing will restart from the current moment. Then, based on the detection records of the temperature sensor, the air fryer obtains the initial temperature inside the chamber in the new detection cycle and the latest current temperature detected by the temperature sensor. Based on the temperature difference between the initial temperature in the new detection cycle and the latest current temperature, and the temperature rise threshold corresponding to the new detection cycle, the air fryer judges the working status of the fan set on the top of the chamber.

[0066] In this embodiment, when the current temperature is not greater than the initial temperature, the air fryer enters a new detection cycle, determines the current temperature as the initial temperature of the new detection cycle, and re-acquires the initial and current temperatures of the air fryer's internal chamber during the detection cycle. This avoids misjudgments caused by a drop in the chamber temperature or the air fryer entering the heat preservation stage, thereby improving the accuracy of fan fault diagnosis.

[0067] In an exemplary embodiment, the fault judgment method for the air fryer fan provided in this application further includes the following: if the current temperature is greater than the initial temperature, then based on the time difference between the current time of obtaining the current temperature and the initial time of obtaining the initial temperature, and the duration corresponding to the detection cycle, a judgment is made on whether to enter the next detection cycle.

[0068] If the time difference is greater than the duration corresponding to the detection cycle, the process proceeds to the next detection cycle, and the current temperature is set as the initial temperature for the next detection cycle. The process then returns to the steps of obtaining the initial and current temperatures of the air fryer's interior during the detection cycle.

[0069] Furthermore, the detection cycle is set to 30 seconds.

[0070] Specifically, it's understandable that the temperature rise threshold represents the normal temperature rise range within the chamber during the detection cycle. Since the temperature inside the air fryer doesn't change uniformly during the heating phase, the temperature rise threshold differs for detection cycles starting from different initial temperatures. Therefore, if the time difference between the current moment and the initial moment is greater than the duration of the detection cycle (i.e., a significant time interval exists between the current and initial moments), the original temperature rise threshold for the detection cycle is insufficient to determine whether the temperature rise inside the chamber exceeds the normal range. For example, assuming a detection cycle duration of 30 seconds, the temperature rise threshold for a detection cycle starting at 20°C is 40°C, and the threshold for a detection cycle starting at 50°C is 25°C. If the initial temperature is 20°C, and the current temperature is detected as 50°C after 40 seconds, and the fan malfunctions, continuing to use the 40°C threshold for judgment will not result in a false alarm because the temperature difference between 50°C and 20°C is less than the 40°C threshold.

[0071] Therefore, if the time difference is greater than the duration of the detection cycle, continuing to use the temperature rise threshold and initial temperature corresponding to the original detection cycle to diagnose the fan's fault may result in a misjudgment. To avoid this, the air fryer needs to enter a new detection cycle, determine the current temperature as the initial temperature of the new detection cycle, and return to the step of obtaining the initial and current temperatures inside the air fryer's casing during the detection cycle. This will allow the air fryer to obtain the initial temperature inside the casing during the new detection cycle and the latest current temperature detected by the temperature sensor, and continue to assess the fan's operating status.

[0072] For example, starting from the initial moment, the initial temperature is denoted as... The cumulative time at the current moment is recorded as The cumulative time at the current moment represents the time difference between the current moment and the initial moment. The current temperature is denoted as... The duration corresponding to the detection cycle is denoted as So, what is the cumulative timer for the air fryer at the current moment? In this case, a new detection cycle begins, and the current temperature is set as the initial temperature for the new detection cycle. Therefore, the timing will restart from the current moment. Then, based on the detection records of the temperature sensor, the air fryer obtains the initial temperature inside the chamber in the new detection cycle and the latest current temperature detected by the temperature sensor. Based on the temperature difference between the initial temperature in the new detection cycle and the latest current temperature, and the temperature rise threshold corresponding to the new detection cycle, the air fryer judges the working status of the fan set on the top of the chamber.

[0073] In this embodiment, when the time difference is greater than the duration corresponding to the detection cycle, the air fryer enters a new detection cycle, determines the current temperature as the initial temperature of the new detection cycle, and re-acquires the initial and current temperatures inside the air fryer's casing within the detection cycle. This avoids misjudgment caused by a long interval between the current moment and the initial moment, thereby improving the accuracy of fan fault diagnosis.

[0074] In an exemplary embodiment, the fault judgment method for an air fryer fan provided in this application further includes the following: if the current temperature is greater than the initial temperature and the time difference is not greater than the duration corresponding to the detection cycle, then the working state of the fan is judged based on the temperature difference and the temperature rise threshold.

[0075] Specifically, when the current temperature of the air fryer is higher than the initial temperature, meaning the temperature inside the fryer is trending upwards, and the time difference between the current moment and the initial moment is not greater than (i.e. less than or equal to) the duration corresponding to the detection cycle, meaning the temperature rise threshold corresponding to the detection cycle is sufficient to determine whether the temperature rise inside the fryer exceeds the normal temperature rise range, the working status of the fan is judged based on the temperature difference and the temperature rise threshold.

[0076] For example, starting from the initial moment, the initial temperature is denoted as... The cumulative time at the current moment is recorded as The cumulative time at the current moment represents the time difference between the current moment and the initial moment. The current temperature is denoted as... The duration corresponding to the detection cycle is denoted as So, the air fryer has a temperature difference And the cumulative timeout at the current moment In this case, the operating status of the fan is determined based on the temperature difference and temperature rise threshold.

[0077] In this embodiment, on the one hand, by comparing the initial temperature with the current temperature, it can be determined whether it is necessary to judge the working status of the fan, thereby avoiding unnecessary judgments; on the other hand, by comparing the time difference with the duration corresponding to the detection cycle, it can be determined whether the temperature rise threshold can be used to judge the working status of the fan, thereby avoiding inaccurate judgments and improving the accuracy of fault diagnosis of the air fryer fan.

[0078] In an exemplary embodiment, the working state of the fan is determined based on the temperature difference and the temperature rise threshold, specifically including the following: if the temperature difference is not greater than the temperature rise threshold, the working state of the fan is determined to be normal, and the step of obtaining the initial temperature and current temperature of the air fryer's interior during the detection period is returned.

[0079] Specifically, if the temperature difference is greater than the temperature rise threshold, it means that the temperature rise inside the fryer from the initial moment to the current moment exceeds the corresponding normal temperature rise range. According to the working principle of the air fryer, this is most likely due to a fan malfunction, causing the heat generated by the heating element inside the fryer to flow directly upwards. Therefore, the air fryer determines that the fan is in an abnormal state. If the temperature difference is less than or equal to the temperature rise threshold, it means that the temperature rise inside the fryer from the initial moment to the current moment is still within the corresponding normal temperature rise range. Therefore, the air fryer determines that the fan is in a normal state.

[0080] It should be noted that the temperature sensor detects the temperature inside the air fryer at preset time intervals, for example, once every 1 second. Therefore, when the fan is working normally, the air fryer returns to the step of obtaining the initial temperature and the current temperature inside the air fryer during the detection cycle, so as to obtain the initial temperature inside the air fryer during the detection cycle and the new current temperature detected by the temperature sensor, and continues to judge the working status of the fan.

[0081] For example, the temperature difference is denoted as... The temperature rise threshold is denoted as ;like If the air fryer determines that the fan is in an abnormal operating state, it means that the fan has malfunctioned; if If the air fryer determines that the fan is working normally, that is, it is determined that the fan is not malfunctioning. Then, based on the detection records of the temperature sensor, the air fryer obtains the initial temperature and the latest current temperature inside the air fryer during the detection period. Based on the temperature difference between the latest current temperature and the initial temperature, and the temperature rise threshold corresponding to the detection period, the air fryer judges the working status of the fan set on the top of the air fryer.

[0082] In this embodiment, the air fryer can determine the actual temperature rise inside the chamber based on the temperature difference, and then judge the relationship between the actual temperature rise and the temperature rise threshold. If the actual temperature rise exceeds the temperature rise threshold, it means that the temperature rise inside the chamber exceeds the normal temperature rise range, so it can be determined that the fan is in an abnormal state. If the actual temperature rise does not exceed the temperature rise threshold, it means that the temperature rise inside the chamber is still within the normal temperature rise range, so it can be determined that the fan is in a normal state. The initial temperature and the latest current temperature inside the air fryer chamber during the detection cycle are obtained again, so as to perform cyclic judgment on the fan fault, thereby realizing real-time fault judgment of the fan.

[0083] like Figure 2 As shown, in an exemplary embodiment, the temperature rise threshold in any of the above embodiments is determined in the following manner:

[0084] Step S202: Based on the pre-established temperature rise relationship in the air fryer, determine the reference temperature rise inside the chamber during the detection cycle.

[0085] Step S204: Use the reference temperature rise as the temperature rise threshold corresponding to the detection cycle.

[0086] The pre-established temperature rise relationship is used to characterize the reference mapping relationship between the temperature inside the chamber and the heating time of the air fryer.

[0087] Specifically, the air fryer determines a reference temperature rise within the chamber during a testing cycle based on a pre-established temperature rise relationship. Then, the air fryer uses this reference temperature rise as the temperature rise threshold for the corresponding testing cycle. For example, based on the temperature rise relationship, the air fryer first determines the reference temperature inside the chamber at the end of a testing cycle starting from the initial temperature. Then, the air fryer calculates the temperature difference between the reference temperature and the initial temperature; this temperature difference is the reference temperature rise.

[0088] The pre-established temperature rise relationship can be represented by the corresponding temperature rise mapping function.

[0089] For example, the temperature rise mapping function is denoted as... ,in, Indicates the temperature inside the chamber. This indicates the heating time of the air fryer; the duration corresponding to the detection cycle is denoted as... The air fryer first sets the initial temperature... Substituting into the temperature rise mapping function, i.e. Thus, the heating time corresponding to the initial moment in the temperature rise relationship can be obtained. Then, the air fryer will... Substituting these values ​​into the temperature rise mapping function, the reference temperature inside the chamber at the end of the detection cycle, which starts at the initial temperature, can be calculated. ,Right now Finally, the air fryer will use the reference temperature. With initial temperature Temperature difference between The temperature rise threshold corresponding to this detection cycle is determined as follows: .

[0090] In this embodiment, during the heating phase of the air fryer, the temperature inside the chamber does not change uniformly. Therefore, based on the temperature rise relationship that characterizes the relationship between the temperature inside the chamber and the heating time of the air fryer, the air fryer can determine the reference temperature rise inside the chamber within different detection cycles, and thus obtain the temperature rise threshold corresponding to the detection cycle, i.e., the normal temperature rise range corresponding to the detection cycle. Based on the temperature rise threshold corresponding to the detection cycle, the air fryer can determine whether the actual temperature rise inside the chamber within the detection cycle is abnormal.

[0091] like Figure 3 As shown, in an exemplary embodiment, the pre-established temperature rise relationship is obtained in the following manner:

[0092] Step S302: Obtain the first mapping relationship between the temperature inside the chamber and the heating time of the air fryer under the first heating condition where the fan is working normally.

[0093] Step S304: The product of the first preset coefficient and the first mapping relationship is used as the temperature rise relationship corresponding to the air fryer.

[0094] Wherein, the first preset coefficient is greater than 1; preferably, the first preset coefficient is slightly greater than 1, for example, 1.1.

[0095] Under the first heating condition, the first voltage applied to the air fryer is greater than the standard voltage corresponding to the air fryer; for example, the standard voltage is... Then, the first voltage applied under the first heating condition .

[0096] Preferably, .

[0097] Specifically, before the air fryer leaves the factory, testing can be conducted to obtain the corresponding temperature rise relationship. The specific process is as follows: The test terminal sets the first heating condition to normal fan operation and the first voltage applied to the air fryer to be greater than the standard voltage corresponding to the air fryer, and sets the target temperature of the air fryer to the highest temperature that the air fryer can be set. Then, the air fryer is started under the first heating condition, and the temperature change trend inside the air fryer with heating time is recorded, thereby obtaining the temperature change trend inside the chamber with heating time, and thus obtaining the first mapping relationship between the temperature inside the chamber and the heating time of the air fryer, that is, the fastest theoretical temperature rise inside the chamber under normal fan operation. Then, the test terminal multiplies the first mapping relationship with a first preset coefficient greater than 1, and uses the product of the first preset coefficient and the first mapping relationship as the corresponding temperature rise relationship of the air fryer, so that the corresponding temperature rise relationship of the air fryer can be slightly greater than the first mapping relationship, thereby allowing a certain fluctuation range for fan fault judgment and avoiding misjudgment of fan fault.

[0098] The first mapping relationship can be represented by the corresponding first mapping function. It means that, among them, Indicates the temperature inside the chamber. This indicates the heating time of the air fryer.

[0099] For example, the first preset coefficient is denoted as Then the test terminal will use the first preset coefficient. With the first mapping function The product of these two factors represents the temperature rise relationship for the air fryer; that is, the temperature rise mapping function corresponding to the temperature rise relationship is expressed as: .

[0100] The testing terminal can be an air fryer or other testing equipment, such as a computer used for testing.

[0101] In this embodiment, on the one hand, by setting the first heating condition to an applied first voltage greater than the standard voltage and the fan operating normally, the test terminal can obtain the first mapping relationship characterizing the fastest theoretical temperature rise inside the chamber under the first heating condition where the fan is operating normally; on the other hand, by using the product between a first preset coefficient greater than 1 and the first mapping relationship as the temperature rise relationship in the air fryer, the test terminal can make the corresponding normal temperature rise range inside the chamber slightly greater than the theoretical temperature rise, thereby avoiding misjudgment of fan malfunction.

[0102] like Figure 4 As shown, in an exemplary embodiment, the pre-established temperature rise relationship can also be obtained in the following way:

[0103] Step S402: Obtain a first mapping relationship between the temperature inside the chamber and the heating time of the air fryer under the first heating condition where the fan is working normally, and obtain a second mapping relationship between the temperature inside the chamber and the heating time of the air fryer under the second heating condition where the fan stops working.

[0104] Step S404: Based on the first mapping relationship and the second mapping relationship, obtain the temperature rise relationship corresponding to the air fryer.

[0105] Specifically, before the air fryer leaves the factory, tests can be conducted under different operating conditions to obtain the corresponding temperature rise relationship. The specific process is as follows: The test terminal sets the first heating condition to normal fan operation and the second heating condition to fan shutdown. Then, the air fryer is started under both heating conditions, and the temperature change trend inside the air fryer with heating time is recorded. This yields the trend of temperature increase inside the chamber with heating time, thus obtaining the first mapping relationship between the temperature inside the chamber and the heating time of the air fryer under the first heating condition, i.e., the theoretical temperature rise inside the chamber when the fan is working normally. And, under the second heating condition, the second mapping relationship between the temperature inside the chamber and the heating time of the air fryer, i.e., the theoretical temperature rise inside the chamber when the fan is off. Then, based on the first and second mapping relationships, the test terminal obtains the corresponding temperature rise relationship of the air fryer.

[0106] It should be noted that, under both the first and second heating conditions, the target temperature set for the air fryer is the highest temperature that the air fryer can be set to.

[0107] In this embodiment, the testing terminal obtains a first mapping relationship characterizing the temperature rise inside the chamber under the first heating condition where the fan is working normally, and a second mapping relationship characterizing the temperature rise inside the chamber under the second heating condition where the fan is not working. This allows the testing terminal to determine the theoretical temperature rise inside the chamber under the conditions of normal fan operation and fan cessation. Therefore, the testing terminal can further consider the theoretical temperature rise under the conditions of normal fan operation and fan cessation to obtain the temperature rise relationship in the air fryer.

[0108] like Figure 5 As shown, in an exemplary embodiment, step S404 above, based on the first mapping relationship and the second mapping relationship, obtains the temperature rise relationship corresponding to the air fryer, specifically including the following steps:

[0109] Step S502: Merge the first mapping relationship and the second mapping relationship to obtain the merged mapping relationship.

[0110] Step S504: The product of the second preset coefficient and the fusion mapping relationship is used as the temperature rise relationship corresponding to the air fryer.

[0111] It is understandable that, for the same heating time, the temperature inside the enclosure under normal fan operation will be lower than the temperature inside the enclosure under normal fan operation. Therefore, the first mapping relationship will be less than the second mapping relationship.

[0112] Wherein, the second preset coefficient is less than 1; preferably, the second preset coefficient is slightly less than 1, for example, 0.75.

[0113] Specifically, the test terminal integrates the first mapping relationship and the second mapping relationship, for example, by adding the first mapping relationship and the second mapping relationship to obtain the integrated mapping relationship; then, the test terminal multiplies the integrated mapping relationship with a second preset coefficient less than 1, and uses the product between the second preset coefficient and the integrated mapping relationship as the temperature rise relationship corresponding to the air fryer, so that the temperature rise relationship corresponding to the air fryer is slightly greater than the first mapping relationship and slightly less than the second mapping relationship, thereby reserving a certain fluctuation range for the fault judgment of the fan and avoiding misjudgment of the fan fault.

[0114] For example, the second preset coefficient is denoted as The test terminal first adds the first and second mapping relationships to obtain the fused mapping relationship, which is: Then, the test terminal will use the second preset coefficient. With fusion mapping function The product of these two factors represents the temperature rise relationship for the air fryer; that is, the temperature rise mapping function corresponding to the temperature rise relationship is expressed as: .

[0115] like Figure 6 The diagram shows the first mapping function under the first heating condition, the second mapping function under the second heating condition, and the temperature rise mapping function corresponding to the temperature rise relationship.

[0116] In this embodiment, by using the product of a second preset coefficient less than 1 and the fusion mapping relationship corresponding to the first mapping relationship and the second mapping relationship as the temperature rise relationship in the air fryer, the normal temperature rise range inside the chamber can be slightly greater than the theoretical temperature rise under normal fan operation and slightly less than the theoretical temperature rise under fan stop operation, thereby avoiding misjudgment of fan failure.

[0117] In an exemplary embodiment, in step S402 above, under the first heating condition, the first voltage applied to the air fryer is greater than the standard voltage corresponding to the air fryer, and under the second heating condition, the second voltage applied to the air fryer is equal to the standard voltage.

[0118] Specifically, the test terminal is set to the following first heating conditions: the fan is operating normally, and the first voltage applied to the air fryer is greater than the standard voltage corresponding to the air fryer; for example, the standard voltage is... Then, the first voltage applied under the first heating condition The second voltage applied under the second heating condition

[0119] Preferably, .

[0120] In this embodiment, by further setting the first voltage corresponding to the first heating condition to a voltage greater than the standard voltage and setting the second voltage corresponding to the second heating condition to a voltage equal to the standard voltage, the test terminal enables the first mapping relationship to characterize the fastest theoretical temperature rise inside the chamber when the fan is working normally, and enables the second relationship to characterize the slowest theoretical temperature rise inside the chamber when the fan stops working.

[0121] In an exemplary embodiment, the fault judgment method for an air fryer fan provided in this application further includes the following: if the working state of the fan is abnormal, or the current temperature is greater than or equal to the target temperature corresponding to the air fryer, then the fault judgment of the fan is terminated.

[0122] The target temperature is the temperature that the user sets the air fryer to reach.

[0123] Specifically, if the air fryer determines that the fan is in an abnormal state, it needs to further stop heating and issue a fault warning, thus ending the fault diagnosis of the fan. If the current temperature obtained by the air fryer is greater than or equal to the target temperature corresponding to the air fryer, it means that the temperature inside the fryer has reached the user-set target temperature, and the air fryer needs to move from the heating stage to the heat preservation stage. It is understandable that the working principle of the air fryer in the heating stage and the heat preservation stage are different, so the fault diagnosis methods adopted are also different. Therefore, when the temperature inside the fryer has reached the user-set target temperature, it is necessary to end the fault diagnosis of the fan in the heating stage and adopt the fault diagnosis method of the heat preservation stage to diagnose the fault.

[0124] In an exemplary embodiment, the fault judgment method for the air fryer fan provided in this application further includes the following: if the working state of the fan is abnormal, the heating element inside the chamber is turned off, and a prompt is given regarding the abnormal state of the fan.

[0125] Specifically, if the air fryer determines that the fan is in an abnormal state, it will shut off the heating element inside the fryer to stop heating and will issue a warning for the abnormal fan state, such as by flashing an indicator light or by emitting a beeping sound.

[0126] In this embodiment, when the fan malfunctions, the air fryer can prevent other components from being affected by high temperatures and avoid dangerous situations such as fires by shutting off the heating element inside the unit and issuing a warning.

[0127] In an exemplary embodiment, the fault diagnosis method for the air fryer fan provided in this application further includes the following: after the air fryer is powered on, the temperature inside the air fryer is detected in real time, and the temperature inside the air fryer when it is first powered on or when it is first started heating is used as the initial temperature in the first detection cycle.

[0128] Specifically, when the air fryer is powered on, the temperature sensor detects the temperature inside the chamber in real time at preset intervals. The temperature inside the chamber when the air fryer is powered on or when heating is started is used as the initial temperature for the first detection cycle, that is, the first detection cycle begins when the air fryer is powered on or when heating is started.

[0129] In this embodiment, the air fryer uses the temperature inside the chamber when it is first powered on or when heating is first started as the initial temperature in the first detection cycle. This allows the air fryer to start judging the fan malfunctions from the moment it is powered on or when heating begins. Furthermore, by monitoring the temperature inside the chamber in real time, the air fryer can judge the fan malfunctions in real time.

[0130] In one exemplary embodiment, such as Figure 7As shown, another method for diagnosing air fryer fan malfunctions is provided. Taking the application of this method to an air fryer as an example, the following steps are included:

[0131] Step S702: After the air fryer is powered on, the temperature inside the air fryer is detected in real time, and the temperature inside the air fryer when it is first powered on or when it starts heating is used as the initial temperature for the first detection cycle.

[0132] Step S704: Obtain the initial temperature and current temperature of the air fryer's interior during the detection cycle.

[0133] Step S706: Based on the current temperature and the initial temperature, determine whether to enter the next detection cycle.

[0134] Step S708: If the current temperature is not greater than the initial temperature, proceed to the next detection cycle, determine the current temperature as the initial temperature of the next detection cycle, and return to the step of obtaining the initial temperature and current temperature inside the air fryer during the detection cycle.

[0135] Step S710: If the current temperature is greater than the initial temperature, then based on the time difference between the current time of obtaining the current temperature and the initial time of obtaining the initial temperature, and the duration corresponding to the detection cycle, it is determined whether to enter the next detection cycle. If the time difference is greater than the duration corresponding to the detection cycle, then the next detection cycle is entered, and the current temperature is determined as the initial temperature of the next detection cycle. Then, the process returns to the step of obtaining the initial temperature and current temperature inside the air fryer within the detection cycle.

[0136] Step S712: If the current temperature is greater than the initial temperature and the time difference is not greater than the duration corresponding to the detection cycle, then the working status of the fan is judged based on the temperature difference and the temperature rise threshold.

[0137] Step S714: If the temperature difference is greater than the temperature rise threshold, the fan is determined to be in an abnormal state. The heating element inside the housing is turned off, the abnormal state of the fan is indicated, and the fault diagnosis of the fan ends.

[0138] Step S716: If the temperature difference is not greater than the temperature rise threshold, the fan is determined to be in normal working condition, and the process returns to the step of obtaining the initial temperature and current temperature of the air fryer's interior during the detection cycle.

[0139] Step S718: If the current temperature is greater than or equal to the target temperature of the air fryer, the fault diagnosis of the fan ends.

[0140] In this embodiment, firstly, the air fryer obtains the temperature changes inside the chamber at different times to determine the temperature variations within the chamber, and then judges the operating status of the fan located on the top of the chamber based on these temperature changes. Secondly, on one hand, by comparing the initial temperature with the current temperature, the air fryer can determine whether it is necessary to judge the fan's operating status, thus avoiding unnecessary judgments; on the other hand, by comparing the time difference with the duration corresponding to the detection cycle, the air fryer can determine whether the temperature rise threshold can be used to judge the fan's operating status, thus avoiding inaccurate judgments. Thirdly, if the current temperature is not greater than the initial temperature or the time difference is not less than the duration corresponding to the detection cycle, the air fryer enters a new detection cycle, determines the current temperature as the initial temperature for the new detection cycle, and re-obtains the initial and current temperatures inside the air fryer chamber within the detection cycle. This allows for cyclical judgment of fan malfunctions based on the actual temperature changes inside the chamber, thereby achieving real-time fan malfunction judgment. Finally, during the heating phase of the air fryer, the temperature inside the chamber does not change uniformly. Therefore, based on the temperature rise relationship that characterizes the relationship between the temperature inside the chamber and the heating time of the air fryer, the temperature rise threshold corresponding to the detection cycle starting from different initial temperatures can be determined, thereby determining whether the actual temperature rise inside the chamber is abnormal.

[0141] To more clearly illustrate the fault diagnosis method for air fryer fans provided in this application, a specific embodiment is used below to describe the fault diagnosis method for air fryer fans. However, it should be understood that the embodiments of this application are not limited thereto. Figure 8 As shown in an exemplary embodiment, this application also provides a method for detecting an air fryer fan, specifically including the following steps:

[0142] 1. Power on the air fryer or start heating, and obtain the initial temperature from the temperature probe. Counting at the same time The timer increments by 1 every second.

[0143] 2. The air fryer obtains the current temperature from its temperature probe. .

[0144] 3. How to determine if an air fryer is working properly? Is it greater than the set target temperature? If the conditions are met, it means that the temperature inside the chamber has reached the set target temperature, which means the air fryer heating stage is over, and the fan detection during the heating stage ends. If the conditions are not met, proceed to step 4.

[0145] 4. How to determine if an air fryer is working Is it greater than If the conditions are met, proceed to step 5. If not, it indicates that the temperature inside the chamber is decreasing or has not changed, and the chamber needs to be... Assign to and will count Reset to zero, restart the timer, and return to step 2.

[0146] 6. How to determine if an air fryer is working properly Is it greater than the detection cycle? If the conditions are not met, proceed to step 7; if the conditions are met, Assign to ,count Reset to zero, restart the timer, and return to step 2.

[0147] 7. How to determine if an air fryer is working Is it greater than Corresponding temperature rise threshold If the conditions are met, it indicates that the temperature rise inside the enclosure exceeded the normal range during the testing period. Therefore, it can be determined that the fan is malfunctioning, and the heating element should be shut off immediately to alert the user to the fault. If the conditions are not met, continue to acquire new current temperatures. And the fan was tested.

[0148] It is understandable that as the temperature inside the chamber rises, the rate of temperature change gradually decreases. Therefore, the temperature rise threshold cannot be a fixed value; otherwise, it will not be compatible with the detection of high and low temperatures. For example, if the initial temperature is 25°C, it can rise by 50°C in one detection cycle, while if the initial temperature is 50°C, it can only rise by 36°C in one detection cycle. Therefore, if the temperature rise threshold is set too small, false alarms of fan failure may occur in the low-temperature range. If the temperature rise threshold is set too large, the fan may not work in the high-temperature range, but the fault cannot be identified.

[0149] Specifically, temperature rise threshold The acquisition process is as follows:

[0150] Before the air fryer leaves the factory, the slowest theoretical temperature rise curve under fan failure and the fastest theoretical temperature rise curve under normal fan conditions are first calculated. Then, the two curves are added together and multiplied by 0.75 to obtain the preset temperature rise curve. This preset temperature rise curve is slightly smaller than the slowest theoretical temperature rise curve and slightly larger than the fastest theoretical temperature rise curve. Then, when it is necessary to determine the initial temperature... When the corresponding temperature rise threshold is reached, the initial temperature will be... Substitute the preset temperature rise curve into the initial temperature and calculate the initial temperature. The corresponding time value in the preset heating curve, and then the initial temperature. Add the corresponding time value in the preset heating curve to the duration of the detection cycle and substitute it into the preset heating curve to calculate the initial temperature. Within the testing cycle starting from this point, the preset temperature rise inside the chamber is used as the initial temperature. Corresponding temperature rise threshold .

[0151] In this embodiment, the fan detection method described above does not require additional mechanical structures or components. The air fryer's existing temperature probe can be used to detect whether the fan is functioning correctly. Furthermore, by using a pre-defined temperature rise curve, the temperature rise threshold corresponding to different starting temperatures can be determined, thus enabling detection across both high and low temperature ranges.

[0152] 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.

[0153] Based on the same inventive concept, this application also provides a fault diagnosis device for an air fryer fan to implement the fault diagnosis method for an air fryer fan 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 air fryer fan fault diagnosis device embodiments provided below can be found in the limitations of the fault diagnosis method for air fryer fans described above, and will not be repeated here.

[0154] In one exemplary embodiment, such as Figure 9 As shown, a fault diagnosis device for an air fryer fan is provided, comprising: a temperature acquisition module 902 and a fault diagnosis module 904, wherein:

[0155] The chamber temperature acquisition module 902 is used to acquire the initial temperature and current temperature inside the air fryer chamber during the detection cycle.

[0156] The fan fault judgment module 904 is used to judge the working status of the fan set on the top of the housing based on the temperature difference between the current temperature and the initial temperature and the temperature rise threshold corresponding to the detection cycle. If the temperature difference is greater than the temperature rise threshold, the working status of the fan is determined to be abnormal.

[0157] In an exemplary embodiment, the fault diagnosis device for the air fryer fan further includes a detection cycle judgment module, which is used to determine whether to enter the next detection cycle based on the current temperature and the initial temperature. If the current temperature is not greater than the initial temperature, the device enters the next detection cycle, determines the current temperature as the initial temperature of the next detection cycle, and returns to the step of obtaining the initial temperature and the current temperature inside the air fryer chamber within the detection cycle.

[0158] In an exemplary embodiment, the detection cycle determination module is further configured to determine whether to enter the next detection cycle based on the time difference between the current time of obtaining the current temperature and the initial time of obtaining the initial temperature, and the duration corresponding to the detection cycle, if the current temperature is greater than the initial temperature. If the time difference is greater than the duration corresponding to the detection cycle, the module enters the next detection cycle, determines the current temperature as the initial temperature of the next detection cycle, and returns to the step of obtaining the initial temperature and current temperature inside the air fryer within the detection cycle.

[0159] In an exemplary embodiment, the fan fault judgment module 904 is further configured to judge the working status of the fan based on the temperature difference and the temperature rise threshold if the current temperature is greater than the initial temperature and the time difference is not greater than the duration corresponding to the detection cycle.

[0160] In an exemplary embodiment, the fan fault determination module 904 is further configured to determine that the fan is in a normal operating state if the temperature difference is not greater than the temperature rise threshold, and return to the step of obtaining the initial temperature and current temperature of the air fryer's interior during the detection cycle.

[0161] In an exemplary embodiment, the fault diagnosis device for the air fryer fan further includes a temperature rise threshold determination module, which is used to determine a reference temperature rise of the temperature inside the air fryer during the detection cycle based on a pre-established temperature rise relationship in the air fryer; the pre-established temperature rise relationship is used to characterize the reference mapping relationship between the temperature inside the air fryer and the heating time of the air fryer; and the reference temperature rise is used as the temperature rise threshold corresponding to the detection cycle.

[0162] In an exemplary embodiment, the fault judgment device for the air fryer fan further includes a temperature rise relationship establishment module, used to obtain a first mapping relationship between the temperature inside the chamber and the heating time of the air fryer under the first heating condition where the fan is working normally; the product of a first preset coefficient and the first mapping relationship is used as the temperature rise relationship corresponding to the air fryer; the first preset coefficient is greater than 1; wherein, under the first heating condition, the first voltage applied to the air fryer is greater than the standard voltage corresponding to the air fryer.

[0163] In an exemplary embodiment, the temperature rise relationship establishment module is further configured to obtain a first mapping relationship between the temperature inside the chamber and the heating time of the air fryer under a first heating condition where the fan is working normally, and to obtain a second mapping relationship between the temperature inside the chamber and the heating time of the air fryer under a second heating condition where the fan stops working; and to obtain the temperature rise relationship corresponding to the air fryer based on the first mapping relationship and the second mapping relationship.

[0164] In an exemplary embodiment, the temperature rise relationship establishment module is further configured to fuse the first mapping relationship and the second mapping relationship to obtain a fused mapping relationship; and to use the product between the second preset coefficient and the fused mapping relationship as the temperature rise relationship corresponding to the air fryer; the second preset coefficient is less than 1.

[0165] In one exemplary embodiment, under a first heating condition, a first voltage applied to the air fryer is greater than the standard voltage corresponding to the air fryer, and under a second heating condition, a second voltage applied to the air fryer is equal to the standard voltage.

[0166] In an exemplary embodiment, the fan fault judgment module 904 is further configured to terminate the fan fault judgment if the fan's operating state is abnormal, or if the current temperature is greater than or equal to the target temperature corresponding to the air fryer.

[0167] In an exemplary embodiment, the fan fault judgment module 904 is further configured to shut down the heating element inside the housing and provide a prompt regarding the abnormal state of the fan if the fan's operating state is abnormal.

[0168] In an exemplary embodiment, the chamber temperature acquisition module 902 is further configured to detect the temperature inside the air fryer in real time after the air fryer is powered on, and use the temperature inside the chamber when the air fryer is first powered on or just started heating as the initial temperature in the first detection cycle.

[0169] The various modules in the aforementioned air fryer fan fault diagnosis device can be implemented entirely or partially through software, hardware, or a combination thereof. These modules can be embedded in the processor of a computer device in hardware form or independent of it, or stored in the memory of a computer device in software form, so that the processor can call and execute the corresponding operations of each module.

[0170] In one exemplary embodiment, a computer device is provided, which may be a terminal, and its internal structure diagram may be as follows: Figure 10As shown, the computer device includes a processor, memory, input / output interface, display unit, and input device. The processor, memory, and input / output interface are connected via a system bus, and the display unit and input device are also connected to the system bus via the input / output interface. The processor provides computing and control capabilities. The memory includes non-volatile storage media and internal memory. The non-volatile storage media stores the operating system and computer programs. The internal memory provides an environment for the operation of the operating system and computer programs stored in the non-volatile storage media. The input / output interface is used for exchanging information between the processor and external devices. When the computer program is executed by the processor, it implements a fault diagnosis method for an air fryer fan. The display unit is used to form a visually visible image and can be a display screen, such as an LCD screen or an e-ink screen. The input device can be a touch layer covering the display screen, or buttons, a trackball, or a touchpad located on the computer device's casing.

[0171] Those skilled in the art will understand that Figure 10 The structure shown is merely a block diagram of a portion of the structure related to the present application and does not constitute a limitation on the computer device to which the present application is applied. Specific computer devices may include more or fewer components than those shown in the figure, or combine certain components, or have different component arrangements.

[0172] In one exemplary embodiment, a computer device is also provided, including a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to implement the steps in the above-described method embodiments.

[0173] In one embodiment, a computer-readable storage medium is provided having a computer program stored thereon that, when executed by a processor, implements the steps in the above method embodiments.

[0174] In one embodiment, a computer program product is provided, including a computer program that, when executed by a processor, implements the steps in the above method embodiments.

[0175] Those skilled in the art will understand that all or part of the processes in 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. When executed, the computer program can include the processes of the embodiments described above. 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.

[0176] 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.

[0177] 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 diagnosing faults in an air fryer fan, characterized in that, The method includes: Obtain the initial and current temperatures inside the air fryer during the detection cycle; Based on the temperature difference between the current temperature and the initial temperature, and the temperature rise threshold corresponding to the detection cycle, the working status of the fan installed on the top of the housing is determined. If the temperature difference is greater than the temperature rise threshold, the working status of the fan is determined to be abnormal. The temperature rise threshold is determined as follows: based on a pre-established temperature rise relationship in the air fryer, a reference temperature rise of the temperature inside the chamber is determined within the detection cycle; the pre-established temperature rise relationship is used to characterize the reference mapping relationship between the temperature inside the chamber and the heating time of the air fryer; the reference temperature rise is used as the temperature rise threshold corresponding to the detection cycle. The pre-established temperature rise relationship is established by: obtaining a first mapping relationship between the temperature inside the chamber and the heating time of the air fryer under the first heating condition where the fan is working normally; taking the product of the first preset coefficient and the first mapping relationship as the temperature rise relationship corresponding to the air fryer; under the first heating condition, the first voltage applied to the air fryer is greater than the standard voltage corresponding to the air fryer; and the first preset coefficient is greater than 1.

2. A method for diagnosing faults in an air fryer fan, characterized in that, The method includes: Obtain the initial and current temperatures inside the air fryer during the detection cycle; Based on the temperature difference between the current temperature and the initial temperature, and the temperature rise threshold corresponding to the detection cycle, the working status of the fan installed on the top of the housing is determined. If the temperature difference is greater than the temperature rise threshold, the working status of the fan is determined to be abnormal. The temperature rise threshold is determined as follows: based on a pre-established temperature rise relationship in the air fryer, a reference temperature rise of the temperature inside the chamber is determined within the detection cycle; the pre-established temperature rise relationship is used to characterize the reference mapping relationship between the temperature inside the chamber and the heating time of the air fryer; the reference temperature rise is used as the temperature rise threshold corresponding to the detection cycle. The pre-established temperature rise relationship is established as follows: A first mapping relationship is obtained between the temperature inside the chamber and the heating time of the air fryer under a first heating condition where the fan is working normally; and a second mapping relationship is obtained between the temperature inside the chamber and the heating time of the air fryer under a second heating condition where the fan stops working. Under the first heating condition, a first voltage applied to the air fryer is greater than the standard voltage corresponding to the air fryer; under the second heating condition, a second voltage applied to the air fryer is equal to the standard voltage. The first mapping relationship and the second mapping relationship are merged to obtain a fused mapping relationship. The product of a second preset coefficient and the fused mapping relationship is taken as the temperature rise relationship corresponding to the air fryer; the second preset coefficient is less than 1.

3. The method according to claim 1 or 2, characterized in that, Before the step of determining the operating status of the fan located on the top of the enclosure based on the temperature difference between the current temperature and the initial temperature, and the temperature rise threshold corresponding to the detection cycle, the method further includes: Based on the current temperature and the initial temperature, a determination is made as to whether to enter the next detection cycle. If the current temperature is not greater than the initial temperature, the next detection cycle is entered, and the current temperature is determined as the initial temperature of the next detection cycle. The process then returns to the step of obtaining the initial temperature and current temperature of the air fryer's interior during the detection cycle.

4. The method according to claim 3, characterized in that, If the current temperature is greater than the initial temperature, then based on the time difference between the current time of obtaining the current temperature and the initial time of obtaining the initial temperature, and the duration corresponding to the detection cycle, a determination is made as to whether to enter the next detection cycle. If the time difference is greater than the duration corresponding to the detection cycle, then the next detection cycle is entered, and the current temperature is determined as the initial temperature of the next detection cycle. The process then returns to the step of obtaining the initial temperature and current temperature inside the air fryer within the detection cycle.

5. The method according to claim 4, characterized in that, If the current temperature is greater than the initial temperature and the time difference is not greater than the duration corresponding to the detection cycle, then the working state of the fan is determined based on the temperature difference and the temperature rise threshold.

6. The method according to claim 1 or 2, characterized in that, The determination of the fan's operating status based on the temperature difference and the temperature rise threshold includes: If the temperature difference is not greater than the temperature rise threshold, the fan is determined to be in normal working condition, and the process returns to the step of obtaining the initial temperature and current temperature inside the air fryer during the detection cycle.

7. The method according to claim 1 or 2, characterized in that, The method further includes: If the fan is in an abnormal operating state, or if the current temperature is greater than or equal to the target temperature of the air fryer, then the fault diagnosis of the fan ends.

8. The method according to claim 1 or 2, characterized in that, The method further includes: If the fan is in an abnormal operating state, the heating element inside the housing will be shut down, and a notification will be given indicating the abnormal state of the fan.

9. The method according to claim 1 or 2, characterized in that, The method further includes: After the air fryer is powered on, the temperature inside the air fryer is detected in real time, and the temperature inside the air fryer when it is first powered on or when it starts heating is used as the initial temperature for the first detection cycle.

10. A computer program product, comprising a computer program, characterized in that, When the computer program is executed by a processor, it implements the steps of the method according to any one of claims 1 to 9.

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