A hair dryer heating element temperature prediction method based on big data

Abstract

The application discloses a hair dryer heating element temperature prediction method based on big data, which comprises the following steps: taking the heating element as the only evolution main site, reversely connecting temperature measurement, air path and protection response to obtain a mispositioned main chain; continuously evolving the mispositioned liquid time constant network of air heat to generate three types of time constants; preventing response reversal covering through one-way riveting; obtaining track difference through counterfactual track switching when the air path changes; only correcting the heat dissipation time constant through disturbance isolation; checking the residual heat through shutdown rebound, and freezing the abnormal into a frozen groove; and obtaining the heating element predicted temperature through protection response counterproof screening track. The application relates to the technical field of intelligent household appliance temperature prediction and dynamic modeling, realizes accurate prediction of the hair dryer heating element temperature, and improves the abnormal identification accuracy and operation safety.

Description

Technical Field

[0001] This invention relates to the field of temperature prediction and dynamic modeling technology for smart home appliances, and in particular to a method for predicting the temperature of the heating element of a hair dryer based on big data. Background Technology

[0002] With the development of smart home appliances, big data analytics, machine learning, deep learning, dynamic modeling, mechanistic model fusion, operational status monitoring, advanced control, and fault prediction and health management technologies, hair dryer temperature control is gradually shifting from single threshold protection to process control based on multi-source operational data and temperature prediction models. Existing hair dryers typically consist of a heating element, fan, air duct, temperature sensing element, protection element, and control board. The control board adjusts the heating power and fan speed according to the setting command, the temperature sensing element collects the air duct temperature or the outlet temperature, and the protection element participates in over-temperature safety protection. This structure can achieve basic constant temperature control, power reduction protection, and shutdown protection.

[0003] Current temperature prediction and over-temperature protection systems largely rely on the current sampled temperature, fixed thresholds, or ordinary time-series models. Due to the thermal hysteresis between the temperature measurement location and the heating element, changes in the airflow path, air intake obstruction, nozzle switching, and shutdown rebound can cause the actual thermal state of the heating element to deviate from the temperature measurement response. If model prediction is performed directly according to the original sampling sequence, temperature hysteresis, airflow disturbances, and protection responses can easily be directly written into the heating element's temperature state, causing the temperature trajectory to be overwritten and affecting the accuracy of operational status monitoring and over-temperature safety control.

[0004] Existing technologies lack big data analysis and processing methods for the misalignment characteristics of hair dryer air and heat. It is difficult to rearrange the temperature measurement response, air path response, and protection response according to the actual thermal changes of the heating element. It is also difficult to isolate disturbances, verify residual heat, and screen temperature trajectories during sudden changes in the air path and shutdown rebound stages. This results in insufficient accuracy in predicting the temperature of the heating element and low stability in anomaly identification.

[0005] Therefore, how to provide a method for predicting the temperature of the heating element of a hair dryer based on big data is a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0006] One objective of this invention is to propose a method for predicting the temperature of a hair dryer heating element based on big data. This invention utilizes big data analysis, machine learning, dynamic modeling, mechanistic model fusion, and a network of liquid time constants in air-heat misalignment to establish a robust prediction model for the temperature state of the heating element. It describes in detail the intelligent temperature prediction process involving reverse connection of temperature measurement response, unidirectional riveting, counterfactual track switching, and stop-and-rebound verification. This method has the advantages of early prediction, resistance to airflow disturbances, high temperature control accuracy, and reliable over-temperature protection.

[0007] A method for predicting the temperature of a hair dryer heating element based on big data, according to an embodiment of the present invention, includes the following steps: Using the heating element of the hair dryer as the sole evolutionary master position, the temperature measurement response in the hair dryer's operating sequence is reversed and connected to the earlier segment of the heating element, the air path response is reversed and connected to the segment before the air path change, and the protection response is reversed and connected to the segment adjacent to the heating element, thus obtaining the misaligned master chain. The misaligned main chain is fed into the wind-heat misaligned liquid time constant network, so that the temperature state of the heating element evolves continuously along the misaligned main chain, generating heating time constant, heat dissipation time constant, and temperature measurement time constant. In continuous evolution, unidirectional anchoring is performed on the heating time constant, heat dissipation time constant, and temperature measurement time constant, and the temperature measurement response and wind path response are prohibited from overwriting the anchored time constant in the current prediction window. When the air path changes, the temperature of the heating element remains constant. The air path response is replaced with the air path response before the change. Counterfactual track switching is performed to obtain the track switching difference. When the track switching difference triggers disturbance isolation, the heat dissipation time constant is corrected according to the track switching difference, and the track switching difference is prohibited from rewriting the temperature state of the heating element and the temperature measurement time constant. During shutdown and rebound, the temperature measurement response and protection response are redirected to the pre-shutdown heating segment to verify the residual heat accumulation of the heating element. The temperature status of the heating element that fails the verification is sent to the freezing tank. The temperature trajectory of the heating element is selected from the temperature status of the heating element that has never entered the freezing tank. When the screening results of the heating element temperature trajectory by the protection response and the temperature measurement response are inconsistent, the heating element temperature trajectory is screened by the protection response to obtain the predicted temperature of the heating element.

[0008] Optionally, the process of forming the hair dryer operation sequence specifically includes: Record the operating status, temperature measurement status, air path status, and protection status of the hair dryer's heating element according to the sampling time; Write the operating status of the hair dryer's heating element to the temperature status of the heating element; Write the temperature measurement status into the temperature measurement response and configure the reverse connection entry of the early segment of the heating element for the temperature measurement response. Write the wind path status into the wind path response, and configure the reverse hook entry for the segment before the wind path change in the wind path response; Write the protection status into the protection response and configure the reverse hook entry for the heating element neighborhood segment in the protection response; The blower operation sequence is generated according to the sampling order of the heating element temperature status, temperature measurement response, air path response, protection response, and the corresponding reverse connection port.

[0009] Optionally, obtaining the misaligned main chain specifically includes: Starting from the sampling position corresponding to the heating element of the hair dryer, the sampling positions corresponding to the temperature measurement response, the air path response, and the protection response are read from the hair dryer operation sequence. The temperature measurement misalignment step number is obtained by tracing back from the starting position to the sampling position where the temperature measurement response changes continuously. The temperature measurement response is then reversed and connected to the early segment of the heating element according to the temperature measurement misalignment step number. The number of wind path misalignment steps is obtained by tracing back from the starting position to the sampling position where the wind path response changes. The wind path response is then reversed and attached to the segment before the wind path change according to the number of wind path misalignment steps. The protection misalignment step number is obtained by tracing back from the starting position to the sampling position where the protection response changes continuously. The protection response is then reversed and connected to the neighboring segment of the heating element according to the protection misalignment step number. The main chain is formed by the sampling order after reverse splicing.

[0010] Optionally, the step of continuously evolving the temperature state of the heating element along the misaligned main chain specifically includes: The shielded temperature measurement response, airflow response, and protection response are directly written to the temperature status of the heating element at the original sampling location; The temperature measurement misalignment step count, airflow misalignment step count, and protection misalignment step count respectively form the temperature measurement misalignment push window, airflow misalignment push window, and protection misalignment push window; The early segment of the heating element occupies the current sampling position in the misaligned main chain, driving the heating time constant to advance the temperature state of the heating element; The temperature measurement response occupies the temperature measurement error advance window and drives the temperature measurement time constant to correct the temperature state of the heating element. The air path response occupies the air path misalignment and push window, driving the heat dissipation time constant to return the temperature status of the heating element; The protection response occupies the protection error advance window and performs neighborhood verification on the neighboring segments of the heating element; When the same sampling location is occupied by one of the heating time constant, heat dissipation time constant, or temperature measurement time constant, the writing entry of the remaining time constant at the same sampling location shall be closed according to the first-occupancy-first-close rule. The temperature state of the heating element is continuously evolved according to the misaligned main chain after occupation.

[0011] Optionally, the process of forming the current prediction window specifically includes: Using the current sampling position in the misaligned main chain as the starting point of the window, continuous evolution positions along the misaligned main chain are extracted as candidate prediction windows; If a freezing tank record exists, the misaligned main chain position corresponding to the temperature state of the heating element in the freezing tank will be removed from the candidate prediction window. The eliminated consecutive evolution positions are arranged in the order of sampling to obtain the current prediction window.

[0012] Optionally, the step of performing unidirectional anchoring of the heating time constant, heat dissipation time constant, and temperature measurement time constant during continuous evolution specifically includes: The heating time constant is anchored to the early segment of the heating element, the heat dissipation time constant is anchored to the segment before the change of the air path, and the temperature measurement time constant is anchored to the early segment of the heating element after the temperature measurement response is reversed. After the anchoring is completed, the reverse coverage entrances corresponding to the heating time constant, heat dissipation time constant, and temperature measurement time constant are closed within the current prediction window, and the anchoring results are maintained until the end of the current prediction window; When the temperature measurement response and the airflow response enter the reverse coverage entrance corresponding to the riveted time constant along the reverse coverage direction, the coverage of the riveted time constant by the temperature measurement response and the airflow response is blocked. Based on the heating time constant, heat dissipation time constant, and temperature measurement time constant after the blocking coverage, the temperature state of the heating element is maintained to evolve continuously along the misaligned main chain.

[0013] Optionally, the process of performing a counterfactual track switch to obtain the track switch difference specifically includes: When the airflow path changes, the temperature state of the heating element before the change is locked, preventing the immediate rewriting of the temperature state of the heating element due to the change in the airflow path. Replace the wind path response with the wind path response before the change, and drive the heat dissipation time constant to perform a counterfactual track switching along the segment before the wind path change. Using the temperature state of the heating element before the change as the locking benchmark, the heat dissipation time constant after the counterfactual track switching is locked with the heat dissipation time constant when the air path changes, and the track switching difference is obtained. The track switching difference is retained as the basis for triggering disturbance isolation.

[0014] Optionally, when the track switching difference triggers disturbance isolation, it specifically includes: Write the track switching difference into the unidirectional correction slot of the heat dissipation time constant; Write the temperature status of the heating element into the temperature status lock slot of the heating element, and write the temperature measurement time constant into the temperature measurement time constant lock slot. The one-way correction slot only opens the correction outlet pointing to the heat dissipation time constant, and closes the write-back outlet pointing to the temperature status lockout slot of the heating element and the temperature measurement time constant lockout slot. The heat dissipation time constant is obtained by correcting the track switching difference in the unidirectional correction slot; The isolation heat dissipation time constant is used as the corrected heat dissipation time constant in subsequent continuous evolution.

[0015] Optionally, during the shutdown rebound, the temperature measurement response and protection response are folded back to the pre-shutdown heating segment to verify the residual heat accumulation of the heating element, specifically including: When a shutdown rebound occurs, the end position of the pre-shutdown heating segment is locked as the reversal endpoint; The temperature measurement response is reversed during the shutdown rebound, and the temperature state of the heating element before the reversal point is obtained; The protection response is reversed during the shutdown rebound, and the temperature state of the heating element before the reversal point is obtained; The temperature measurement turnaround state and the protection turnaround state are differentially matched with the temperature state of the heating element before the turnaround endpoint to verify the residual heat accumulation of the heating element. When differential engagement fails, the temperature status of the corresponding heating element is written into the freezing tank. When the differential engagement is successful, the temperature status of the corresponding heating element will be retained as that of the heating element that has not entered the freezing tank.

[0016] Optionally, the step of performing counter-evidence screening on the temperature trajectory of the heating element through protection response specifically includes: The temperature trajectory of the heating element is traced along the temperature measurement response and the protection response respectively in the temperature state of the heating element that has never entered the freezing tank, so as to obtain the temperature trajectory of the heating element on the temperature measurement side and the temperature trajectory of the heating element on the protection side. The temperature trajectory of the heating element on the temperature measuring side and the temperature trajectory of the heating element on the protection side are matched bit by bit at the same sampling sequence position; When the components are locked in place, the temperature trajectory of the heating element on the temperature measuring side is retained as the temperature trajectory of the heating element. When the interlocking is inconsistent, the temperature state of the heating element corresponding to the segment in the temperature trajectory of the heating element on the temperature measuring side that is inconsistent with the temperature trajectory of the heating element on the protection side is written into the freezing tank, and the temperature trajectory of the heating element on the protection side is retained as the temperature trajectory of the heating element. The predicted temperature of the heating element is obtained from the retained temperature trajectory of the heating element.

[0017] The beneficial effects of this invention are: (1) The present invention forms a misaligned main chain by connecting the temperature measurement response, the air path response and the protection response in reverse, so that the heating element heats up early, the heat accumulates before the air path changes, and the protection neighborhood lag response enters the same temperature evolution link; compared with directly predicting the temperature according to the sampling time, the present invention can reduce the lag error caused by the installation distance of the temperature measurement element, so that the true thermal state of the heating element can be identified in advance before the temperature measurement response arrives.

[0018] (2) The present invention introduces unidirectional riveting, staggered push window and first-occupancy first-closure rule in the wind-heat misaligned liquid time constant network. The heating time constant, heat dissipation time constant and temperature measurement time constant will not be overwritten by the temperature measurement response and wind path response in the current prediction window. This process avoids the short-term abnormalities from being directly written into the temperature state of the heating element by the air nozzle switching, air intake obstruction and fan disturbance, thus improving the stability of temperature trajectory prediction.

[0019] (3) The present invention performs counterfactual track switching when the wind path changes, performs differential locking when the machine rebounds after stopping, and uses protection response counter-evidence screening when the temperature measurement side trajectory and the protection side trajectory are inconsistent. Compared with single temperature threshold protection, the present invention can lock the temperature trajectory of the protection side in advance when the temperature measurement response does not reflect the risk of over-temperature, thereby improving the advance amount of over-temperature warning and the reliability of protection. Attached Figure Description

[0020] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings: Figure 1 This is a flowchart of a method for predicting the temperature of a hair dryer heating element based on big data, as proposed in this invention. Figure 2 This is a schematic diagram of the continuous evolution of the misaligned main chain and misaligned advancement proposed in this invention; Figure 3 This is a schematic diagram illustrating the counterfactual track switching, disturbance isolation, and protection response counterfactual screening proposed in this invention. Detailed Implementation

[0021] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the invention, and therefore only show the components relevant to the invention.

[0022] refer to Figures 1-3 A method for predicting the temperature of a hair dryer's heating element based on big data includes the following steps: Using the heating element of the hair dryer as the sole evolutionary master position, the temperature measurement response in the hair dryer's operating sequence is reversed and connected to the earlier segment of the heating element, the air path response is reversed and connected to the segment before the air path change, and the protection response is reversed and connected to the segment adjacent to the heating element, thus obtaining the misaligned master chain. In this invention, the heating element of the hair dryer is taken as the only evolutionary master position, indicating that the temperature prediction process takes the temperature state of the heating element as the continuous update object; the temperature measurement response, air path response and protection response do not directly cover the temperature state of the heating element at the original sampling position. The temperature measurement response is reverse-attached to the earlier segment of the heating element, the air path response is reverse-attached to the segment before the air path changes, and the protection response is reverse-attached to the segment in the neighborhood of the heating element before participating in the evolution of the temperature state of the heating element. The heating element early position segment is the heating element temperature state segment corresponding to the reverse connection of the temperature measurement response, used to carry over the heating element temperature change before the sampling position corresponding to the temperature measurement response; the segment before the air path change is the heating element temperature state segment corresponding to the reverse connection of the air path response, used to carry over the heating element heat dissipation change before the air path change; the heating element neighborhood segment is the heating element temperature state segment corresponding to the reverse connection of the protection response, used to carry over the heating element temperature change corresponding to the protection response. The misaligned main chain is fed into the wind-heat misaligned liquid time constant network, so that the temperature state of the heating element evolves continuously along the misaligned main chain, generating heating time constant, heat dissipation time constant, and temperature measurement time constant. In this invention, the wind-heat misaligned liquid time constant network is a temperature evolution model built based on a liquid time constant network. It controls the update speed of the temperature state of the heating element between adjacent sampling positions through the time constant. The input is the misaligned main chain, and the output is the heating element temperature state, heating time constant, heat dissipation time constant, and temperature measurement time constant that evolve continuously along the misaligned main chain. Wind-heat misalignment means that the temperature measurement response, wind path response, and protection response do not directly participate in the temperature evolution according to the original sampling position, but participate in the temperature evolution according to the reverse connection order in the misaligned main chain. After the misaligned main chain is fed into the wind-heat misaligned liquid time constant network, the network reads the temperature state of the heating element, the temperature measurement response, the air path response and the protection response along the sampling order of the misaligned main chain. Based on the temperature state of the heating element at the previous sampling position, the temperature state of the heating element at the next sampling position is generated, so that the temperature state of the heating element evolves continuously along the misaligned main chain. The temperature status of the heating element is a data status representing the temperature evolution value of the heating element of the hair dryer at each sampling location; the temperature status of the heating element is obtained by writing the operating status of the hair dryer heating element according to the sampling time, and is used as a continuously updated object in the wind-heat misalignment liquid time constant network. The heating time constant is a parameter representing the change in the temperature state of the heating element during the early segment of the heating element. It is obtained by the magnitude of the temperature state difference between adjacent sampling positions within the early segment and the direction of rise and fall of the heating element. The heat dissipation time constant is a parameter representing the change in heat dissipation during the segment before the change in airflow path. It is obtained by the difference in airflow path response values ​​between adjacent sampling positions within the segment before the change in airflow path and the order of change in airflow path response values. The temperature measurement time constant is a parameter representing the lag of the temperature measurement response relative to the temperature state of the heating element. It is obtained by the magnitude of the temperature measurement response difference between adjacent sampling positions after the temperature measurement response is reversed and the direction of rise and fall of the temperature measurement response. In continuous evolution, unidirectional anchoring is performed on the heating time constant, heat dissipation time constant, and temperature measurement time constant, and the temperature measurement response and wind path response are prohibited from overwriting the anchored time constant in the current prediction window. In this invention, unidirectional riveting means restricting the rewriting direction of the heating time constant, heat dissipation time constant, and temperature measurement time constant within the current prediction window, so that the three types of time constants can only participate in the temperature state evolution of the heating element along the sampling order of their respective corresponding segments; the heating time constant, heat dissipation time constant, and temperature measurement time constant after unidirectional riveting are the riveted time constants; Reverse overwrite means that the temperature measurement response or airflow response is written back to the anchored time constant along the reverse connection direction. When the temperature measurement response or airflow response enters the reverse overwrite entry corresponding to the anchored time constant, the reverse overwrite entry is closed, and the value of the anchored time constant in the current prediction window is retained until the current prediction window ends; When the air path changes, the temperature of the heating element remains constant. The air path response is replaced with the air path response before the change. Counterfactual track switching is performed to obtain the track switching difference. In this invention, air path change indicates that the air path response changes between adjacent sampling positions; keeping the temperature state of the heating element unchanged when the air path changes means that the air path response after the air path change does not directly rewrite the temperature state of the heating element at the current sampling position, and the current sampling position retains the temperature state of the heating element before the air path change. The wind path response before the change is the wind path response corresponding to the sampling position before the wind path change occurs; replacing the wind path response with the wind path response before the change means that the wind path response after the wind path change is not used when performing counterfactual track switching, and the wind path response before the change is used to participate in the evolution of the heat dissipation time constant. Counterfactual track switching means that, under the condition that the temperature state of the heating element remains unchanged, the air path response before the change is used to replace the air path response after the change, forming a different heat dissipation time constant evolution process than after the air path change; the track switching difference is the difference between the heat dissipation time constant after the counterfactual track switching and the heat dissipation time constant when the air path changes, which serves as the basis for triggering disturbance isolation. When the track switching difference triggers disturbance isolation, the heat dissipation time constant is corrected according to the track switching difference, and the track switching difference is prohibited from rewriting the temperature state of the heating element and the temperature measurement time constant. In this invention, disturbance isolation means limiting the track switching difference to within the correction range of the heat dissipation time constant, and not allowing the track switching difference to be written into the temperature state of the heating element and the temperature measurement time constant; disturbance isolation is triggered when any of the following conditions are met: the track switching difference values ​​at two consecutive sampling positions are not 0; the direction of change of the track switching difference is opposite to the direction of change of the heat dissipation time constant when the air path changes. After the track switching difference triggers the disturbance isolation, the heat dissipation time constant is only corrected based on the track switching difference. The corrected heat dissipation time constant continues to participate in the continuous evolution of the temperature state of the heating element along the misalignment main chain. The temperature state of the heating element and the temperature measurement time constant do not receive track switching difference writes during the disturbance isolation period. During shutdown and rebound, the temperature measurement response and protection response are redirected to the pre-shutdown heating segment to verify the residual heat accumulation of the heating element. The temperature status of the heating element that fails the verification is sent to the freezing tank. In this invention, the "shutdown rebound" indicates the state in which the temperature measurement response and protection response decrease as the residual heat of the heating element is released after the hair dryer stops heating. The reverse process means that the temperature measurement response and protection response during the shutdown rebound phase are written back into the pre-shutdown heating segment in reverse order of sampling; the residual heat accumulation of the heating element is the temperature state of the heating element retained in the pre-shutdown heating segment; A failed verification indicates that the temperature measurement response or protection response after the reversal is inconsistent with the direction of temperature change of the heating element at the corresponding sampling position in the heating segment before shutdown. The freezing tank is the location to store the temperature status of the heating element that failed the verification. The temperature status of the heating element that enters the freezing tank does not participate in the subsequent selection of the heating element temperature trajectory. The temperature trajectory of the heating element is selected from the temperature status of the heating element that has never entered the freezing tank. When the screening results of the heating element temperature trajectory by the protection response and the temperature measurement response are inconsistent, the heating element temperature trajectory is screened by the protection response to obtain the predicted temperature of the heating element.

[0023] In this invention, the temperature state of the heating element that has not entered the freezing tank is the temperature state of the heating element retained after the aforementioned verification; the temperature trajectory of the heating element is the temperature state of the heating element connected according to the misaligned main chain sampling order, which is used to represent the continuous change process of the heating element temperature with the sampling position.

[0024] Inconsistent screening results indicate that, at the same sampling sequence location, the direction of change of the temperature state of the heating element selected by the temperature measurement response is inconsistent with that of the temperature state of the heating element selected by the protection response.

[0025] The counter-evidence screening means that when the screening results are inconsistent, the temperature state of the heating element selected by the protection response is used as the object to be retained, and the temperature state of the heating element that is inconsistent with the protection response is excluded; the predicted temperature of the heating element is the temperature value corresponding to the last sampling position in the temperature trajectory of the heating element retained after the counter-evidence screening.

[0026] In this embodiment, the process of forming the hair dryer operation sequence specifically includes: Record the operating status, temperature measurement status, air path status, and protection status of the hair dryer's heating element according to the sampling time; In this invention, the operating state of the heating element of the hair dryer is the working state of the heating element corresponding to each sampling time, which is used to form the temperature state of the heating element; the temperature measurement state is the sampling state of the temperature measurement position corresponding to each sampling time, which is used to form the temperature measurement response; the air path state is the air path change state corresponding to each sampling time, which is used to form the air path response; and the protection state is the sampling state of the protection position corresponding to each sampling time, which is used to form the protection response. Write the operating status of the hair dryer's heating element to the temperature status of the heating element; Write the temperature measurement status into the temperature measurement response and configure the reverse connection entry of the early segment of the heating element for the temperature measurement response. In this invention, the reverse connection inlet is a sampling position marker for the temperature measurement response, airflow response, and protection response entering the corresponding segment; Write the wind path status into the wind path response, and configure the reverse hook entry for the segment before the wind path change in the wind path response; Write the protection status into the protection response and configure the reverse hook entry for the heating element neighborhood segment in the protection response; The blower operation sequence is generated according to the sampling order of the heating element temperature status, temperature measurement response, air path response, protection response, and the corresponding reverse connection port.

[0027] In this embodiment, obtaining the misaligned main chain specifically includes: Starting from the sampling position corresponding to the heating element of the hair dryer, the sampling positions corresponding to the temperature measurement response, the air path response, and the protection response are read from the hair dryer operation sequence. In this invention, the starting position is the sampling position corresponding to the heating element of the hair dryer; the sampling positions corresponding to the temperature measurement response, the air path response, and the protection response are the original sampling positions of the temperature measurement response, the air path response, and the protection response in the hair dryer's operating sequence, respectively. The temperature measurement misalignment step number is obtained by tracing back from the starting position to the sampling position where the temperature measurement response changes continuously. The temperature measurement response is then reversed and connected to the early segment of the heating element according to the temperature measurement misalignment step number. In this invention, backtracking means searching for the sampling position where the temperature response, airflow response, or protection response changes from the starting position along the opposite direction of the sampling time; continuous change means that the response value increases or decreases in two adjacent sampling intervals formed by three consecutive sampling positions; airflow change means that the airflow response changes between two adjacent sampling positions. The number of wind path misalignment steps is obtained by tracing back from the starting position to the sampling position where the wind path response changes. The wind path response is then reversed and attached to the segment before the wind path change according to the number of wind path misalignment steps. The protection misalignment step number is obtained by tracing back from the starting position to the sampling position where the protection response changes continuously. The protection response is then reversed and connected to the neighboring segment of the heating element according to the protection misalignment step number. In this invention, the temperature measurement misalignment step number is the number of sampling intervals between the starting position and the sampling position where the temperature measurement response shows continuous change; the air path misalignment step number is the number of sampling intervals between the starting position and the sampling position where the air path response shows air path change; and the protection misalignment step number is the number of sampling intervals between the starting position and the sampling position where the protection response shows continuous change. The main chain is formed by the sampling order after reverse splicing.

[0028] In this invention, reverse connection means moving the temperature measurement response, airflow response, and protection response from their original sampling positions to their corresponding segments according to the corresponding misalignment steps. The temperature measurement response corresponds to the earlier segment of the heating element, the airflow response corresponds to the segment before the airflow change, and the protection response corresponds to the segment adjacent to the heating element. The misalignment main chain is a chain sequence formed by the heating element temperature state, temperature measurement response, airflow response, and protection response after reverse connection, arranged in the order of sampling.

[0029] In this embodiment, the temperature state of the heating element evolves continuously along the misaligned main chain, specifically including: The shielded temperature measurement response, airflow response, and protection response are directly written to the temperature status of the heating element at the original sampling location; In this invention, the shielded direct write means that the temperature measurement response, airflow response, and protection response do not rewrite the temperature state of the heating element at the original sampling position, but only participate in the temperature state update of the heating element at the corresponding sampling position after reverse connection. The temperature measurement misalignment step count, airflow misalignment step count, and protection misalignment step count respectively form the temperature measurement misalignment push window, airflow misalignment push window, and protection misalignment push window; In this invention, the temperature measurement misalignment advancement window is a continuous sampling position range that covers the same number of sampling intervals as the temperature measurement misalignment step, starting from the sampling position after the temperature measurement response is reversed and following the sampling sequence; the air path misalignment advancement window is a continuous sampling position range that covers the same number of sampling intervals as the air path misalignment step, starting from the sampling position after the air path response is reversed and following the sampling sequence; the protection misalignment advancement window is a continuous sampling position range that covers the same number of sampling intervals as the protection misalignment step, starting from the sampling position after the protection response is reversed and following the sampling sequence. The early segment of the heating element occupies the current sampling position in the misaligned main chain, driving the heating time constant to advance the temperature state of the heating element; In this invention, "occupancy" indicates that the corresponding segment, response, or time constant has been qualified to be written at the specified sampling position; The temperature measurement response occupies the temperature measurement error advance window and drives the temperature measurement time constant to correct the temperature state of the heating element. The air path response occupies the air path misalignment and push window, driving the heat dissipation time constant to return the temperature status of the heating element; In this invention, "recirculation" means that the heat dissipation time constant is applied in reverse to the temperature state of the heating element at the corresponding sampling position based on the position occupied by the airflow response in the airflow misalignment window, so that the temperature state of the heating element at the corresponding sampling position is corrected according to the change of the airflow response. The protection response occupies the protection error advance window and performs neighborhood verification on the neighboring segments of the heating element; In this invention, after the protection response occupies the protection error advance window, it reads the temperature state of the heating element at the same sampling sequence position within the neighboring segment of the heating element; the neighboring verification indicates that the sampling position of the protection response in the protection error advance window can correspond to the temperature state of the heating element at the same sampling sequence position within the neighboring segment of the heating element; when they can correspond, the protection response retains the occupancy within the protection error advance window; when they cannot correspond, the protection response does not retain the occupancy of the corresponding sampling position.

[0030] When the same sampling location is occupied by one of the heating time constant, heat dissipation time constant, or temperature measurement time constant, the writing entry of the remaining time constant at the same sampling location shall be closed according to the first-occupancy-first-close rule. In this invention, the first-come, first-served rule means that only one of the heating time constant, heat dissipation time constant, and temperature measurement time constant can be qualified to write at the same sampling position; after any time constant is qualified to write, the writing entry of the remaining time constants in the same sampling position is closed; the writing entry is the entry for the time constant to rewrite the temperature state of the heating element. The temperature state of the heating element is continuously evolved according to the misaligned main chain after occupation.

[0031] In this invention, the misaligned main chain after occupation refers to the misaligned main chain after the sampling position is occupied and the write entry is closed. The temperature state of the heating element is updated one by one according to the sampling position of the misaligned main chain after occupation, so as to obtain the continuously evolving temperature state of the heating element.

[0032] In this embodiment, the process of forming the current prediction window specifically includes: Using the current sampling position in the misaligned main chain as the starting point of the window, continuous evolution positions along the misaligned main chain are extracted as candidate prediction windows; In this invention, the current sampling position is the sampling position in the misaligned main chain where temperature prediction is being performed; the continuous evolution position is the sampling position in the misaligned main chain that participates in the continuous updating of the temperature state of the heating element according to the sampling order; the candidate prediction window is a sequence of continuous evolution positions extracted from the current sampling position along the sampling order of the misaligned main chain. If a freezing tank record exists, the misaligned main chain position corresponding to the temperature state of the heating element in the freezing tank will be removed from the candidate prediction window. In this invention, the freezing tank records the temperature status of the heating element that failed the verification and the corresponding misaligned main chain position stored in the freezing tank; removal means deleting the misaligned main chain position corresponding to the freezing tank record from the candidate prediction window, and the deleted misaligned main chain position does not participate in the current prediction window arrangement; The eliminated consecutive evolution positions are arranged in the order of sampling to obtain the current prediction window.

[0033] In this invention, the current prediction window is a sequence of continuous evolution positions obtained by excluding the frozen groove records and arranging them in the order of sampling.

[0034] In this embodiment, unidirectional anchoring is performed on the heating time constant, heat dissipation time constant, and temperature measurement time constant during continuous evolution, specifically including: The heating time constant is anchored to the early segment of the heating element, the heat dissipation time constant is anchored to the segment before the change of the air path, and the temperature measurement time constant is anchored to the early segment of the heating element after the temperature measurement response is reversed. In this invention, the heating time constant is anchored to the early segment of the heating element, indicating that the heating time constant only reads the temperature state change of the heating element within the early segment of the heating element; the heat dissipation time constant is anchored to the segment before the change of the airflow path, indicating that the heat dissipation time constant only reads the airflow response change within the segment before the change of the airflow path; the temperature measurement time constant is anchored to the early segment of the heating element after the temperature measurement response is reversed, indicating that the temperature measurement time constant only reads the corresponding change between the temperature measurement response and the temperature state of the heating element within the early segment of the heating element after the temperature measurement response is reversed. After the anchoring is completed, the reverse coverage entrances corresponding to the heating time constant, heat dissipation time constant, and temperature measurement time constant are closed within the current prediction window, and the anchoring results are maintained until the end of the current prediction window; In this invention, the reverse coverage entry is the entry point where the temperature measurement response and the airflow response rewrite the riveted time constant along the reverse coverage direction; the reverse coverage direction is the writing direction that is opposite to the sampling order of the segment corresponding to the riveted time constant; closing the reverse coverage entry means closing the reverse rewriting entry of the temperature measurement response and the airflow response on the riveted time constant within the current prediction window; the riveted time constant is the heating time constant, the heat dissipation time constant, and the temperature measurement time constant after unidirectional riveting is completed; When the temperature measurement response and the airflow response enter the reverse coverage entrance corresponding to the riveted time constant along the reverse coverage direction, the coverage of the riveted time constant by the temperature measurement response and the airflow response is blocked. In this invention, blocking coverage means that when the temperature measurement response and the airflow response reach the reverse coverage entrance corresponding to the anchored time constant, the temperature measurement response and the airflow response are not allowed to rewrite the anchored time constant. Based on the heating time constant, heat dissipation time constant, and temperature measurement time constant after the blocking coverage, the temperature state of the heating element is maintained to evolve continuously along the misaligned main chain.

[0035] In this embodiment, a counterfactual track switching is performed to obtain the track switching difference, specifically including: When the airflow path changes, the temperature state of the heating element before the change is locked, preventing the immediate rewriting of the temperature state of the heating element due to the change in the airflow path. In this invention, latching the temperature state of the heating element before the change means that the temperature state of the heating element at the corresponding sampling position is retained before the value of the air path response changes; blocking immediate rewriting means that the air path response after the air path change is not directly written to the temperature state of the heating element at the current sampling position, and the current sampling position still retains the temperature state of the heating element before the change. Replace the wind path response with the wind path response before the change, and drive the heat dissipation time constant to perform a counterfactual track switching along the segment before the wind path change. In this invention, the wind path response before the change is the wind path response at the sampling position before the wind path response value changes; the counterfactual trajectory change means that under the condition that the temperature state of the heating element remains unchanged, the wind path response before the change is replaced with the wind path response after the change, and the heat dissipation time constant is driven to evolve along the segment before the change of the wind path to obtain the heat dissipation time constant after the counterfactual trajectory change. Using the temperature state of the heating element before the change as the locking benchmark, the heat dissipation time constant after the counterfactual track switching is locked with the heat dissipation time constant when the air path changes, and the track switching difference is obtained. In this invention, the snapping benchmark is the temperature state of the heating element used to compare the heat dissipation time constant after the counterfactual track change with the heat dissipation time constant when the air path changes; the difference snapping means that at the same sampling sequence position, the difference between the heat dissipation time constant after the counterfactual track change and the heat dissipation time constant when the air path changes is compared; the track change difference is the difference in heat dissipation time constant obtained after the difference comparison. The track switching difference is retained as the basis for triggering disturbance isolation.

[0036] In this embodiment, when track switching difference triggers disturbance isolation, the specific steps include: Write the track switching difference into the unidirectional correction slot of the heat dissipation time constant; In this invention, the unidirectional correction slot is a position that only allows track switching differences to affect the correction of the heat dissipation time constant. After the track switching difference is written into the unidirectional correction slot, it is only used as a basis for correcting the heat dissipation time constant, and is not directly written into the temperature status of the heating element and the temperature measurement time constant; Write the temperature status of the heating element into the temperature status lock slot of the heating element, and write the temperature measurement time constant into the temperature measurement time constant lock slot. In this invention, the heating element temperature state locking slot is a position for storing the heating element temperature state and preventing track switching differences from being written into the heating element temperature state; the temperature measurement time constant locking slot is a position for storing the temperature measurement time constant and preventing track switching differences from being written into the temperature measurement time constant. The one-way correction slot only opens the correction outlet pointing to the heat dissipation time constant, and closes the write-back outlet pointing to the temperature status lockout slot of the heating element and the temperature measurement time constant lockout slot. In this invention, the correction outlet is the outlet for the unidirectional correction slot to output track switching differences to the heat dissipation time constant; the write-back outlet is the outlet for the unidirectional correction slot to output track switching differences to the heating element temperature status lockout slot or the temperature measurement time constant lockout slot. After the write-back outlet is closed, track switching differences cannot enter the heating element temperature status lockout slot and the temperature measurement time constant lockout slot; The heat dissipation time constant is obtained by correcting the track switching difference in the unidirectional correction slot; In this invention, the isolation heat dissipation time constant is the heat dissipation time constant after only accepting track switching difference correction and without writing back the track switching difference to the temperature state of the heating element and the temperature measurement time constant; The isolation heat dissipation time constant is used as the corrected heat dissipation time constant in subsequent continuous evolution.

[0037] In this invention, the subsequent continuous evolution is a process in which the temperature state of the heating element continues to evolve along the misaligned main chain after the disturbance isolation is completed. When the isolation heat dissipation time constant participates in the subsequent continuous evolution, it only participates as the corrected heat dissipation time constant in the continuous evolution of the temperature state of the heating element along the misaligned main chain, and does not rewrite the temperature state of the heating element in the temperature state lock slot or the temperature measurement time constant in the temperature measurement time constant lock slot.

[0038] In this embodiment, during shutdown rebound, the temperature measurement response and protection response are redirected to the pre-shutdown heating segment to verify the residual heat accumulation of the heating element, specifically including: When a shutdown rebound occurs, the end position of the pre-shutdown heating segment is locked as the reversal endpoint; In this invention, the shutdown rebound is the state in which the temperature measurement response and protection response decrease as the residual heat of the heating element is released after the blower stops heating; the pre-shutdown heating segment is the sampling segment in which the temperature of the heating element rises in two adjacent sampling intervals formed by three consecutive sampling positions before the shutdown rebound occurs; the return endpoint is the sampling position closest to the start position of the shutdown rebound in the pre-shutdown heating segment. The temperature measurement response is reversed during the shutdown rebound, and the temperature state of the heating element before the reversal point is obtained; In this invention, the downward trend indicates that the temperature response value decreases in two adjacent sampling intervals formed by three consecutive sampling positions; the reverse foldback indicates that the temperature state of the heating element is written in the opposite direction of the sampling time from the temperature response sampling position during the shutdown rebound, before the foldback endpoint; the temperature foldback state is the temperature state of the heating element corresponding to the reverse foldback of the temperature response. The protection response is reversed during the shutdown rebound, and the temperature state of the heating element before the reversal point is obtained; In this invention, the decreasing trend of the protection response during shutdown rebound indicates that the protection response value decreases in both adjacent sampling intervals formed by three consecutive sampling positions; the protection reversal state is the temperature state of the heating element corresponding to the reverse reversal of the protection response. The temperature measurement turnaround state and the protection turnaround state are differentially matched with the temperature state of the heating element before the turnaround endpoint to verify the residual heat accumulation of the heating element. In this invention, differential engagement means comparing the change direction of the temperature measurement return state with the temperature state of the heating element before the return endpoint at the same sampling sequence position, and comparing the change direction of the protection return state with the temperature state of the heating element before the return endpoint; the residual heat accumulation of the heating element is the temperature state of the heating element retained in the heating segment before shutdown. When differential engagement fails, the temperature status of the corresponding heating element is written into the freezing tank. When the differential engagement is successful, the temperature status of the corresponding heating element will be retained as that of the heating element that has not entered the freezing tank.

[0039] In this invention, differential engagement failure indicates that the temperature measurement reversal state or protection reversal state is inconsistent with the direction of temperature change of the heating element at the same sampling sequence position; successful differential engagement indicates that both the temperature measurement reversal state and the protection reversal state are consistent with the direction of temperature change of the heating element at the same sampling sequence position. The freezing tank is used to store the temperature state of the heating element corresponding to differential engagement failure.

[0040] In this embodiment, the temperature trajectory of the heating element is screened by reverse verification through protection response, specifically including: The temperature trajectory of the heating element is traced along the temperature measurement response and the protection response respectively in the temperature state of the heating element that has never entered the freezing tank, so as to obtain the temperature trajectory of the heating element on the temperature measurement side and the temperature trajectory of the heating element on the protection side. In this invention, the temperature state of the heating element that has not entered the freezing tank is the temperature state of the heating element that has not been written into the freezing tank due to differential locking failure; tracing the temperature trajectory of the heating element along the temperature measurement response means connecting the temperature states of the heating element that has not entered the freezing tank according to the sampling order corresponding to the temperature measurement response to obtain the temperature trajectory of the heating element on the temperature measurement side; tracing the temperature trajectory of the heating element along the protection response means connecting the temperature states of the heating element that has not entered the freezing tank according to the sampling order corresponding to the protection response to obtain the temperature trajectory of the heating element on the protection side. The temperature trajectory of the heating element on the temperature measuring side and the temperature trajectory of the heating element on the protection side are matched bit by bit at the same sampling sequence position; In this invention, "position-by-position locking" means that at the same sampling sequence position, the temperature state of the heating element in the temperature trajectory of the heating element on the temperature measuring side is compared with the temperature state of the heating element in the temperature trajectory of the heating element on the protection side. When the components are locked in place, the temperature trajectory of the heating element on the temperature measuring side is retained as the temperature trajectory of the heating element. In this invention, "sequential engagement" means that the temperature state of the heating element on the temperature measuring side and the temperature state of the heating element on the protection side change in the same direction at the same sampling sequence position. When the interlocking is inconsistent, the temperature state of the heating element corresponding to the segment in the temperature trajectory of the heating element on the temperature measuring side that is inconsistent with the temperature trajectory of the heating element on the protection side is written into the freezing tank, and the temperature trajectory of the heating element on the protection side is retained as the temperature trajectory of the heating element. In this invention, inconsistent engagement indicates that the temperature state of the heating element on the measuring side and the temperature state of the heating element on the protection side at the same sampling sequence position do not change in the same direction; the inconsistent segment is the sampling segment in which the temperature state of the heating element with inconsistent engagement occurs continuously. The predicted temperature of the heating element is obtained from the retained temperature trajectory of the heating element.

[0041] In this invention, the predicted temperature of the heating element is the temperature value corresponding to the last sampling position in the retained temperature trajectory of the heating element.

[0042] Example 1: To verify the feasibility of this invention in practice, it was applied to the temperature prediction process of the heating element in a high-speed hair dryer. The hair dryer in this example is an electric heating control device in smart home appliances. Instability in the heating element temperature occurs during high airflow, constant temperature, hot / cold switching, and shutdown / rebound modes. Conventional temperature prediction methods often use temperature measurement data as the main input, directly fitting the temperature according to the sampling order. Airflow changes and protection responses are treated as mere additional parameters, lacking big data analysis, dynamic modeling, and mechanistic model fusion processing for multi-source sampling data. In actual operation, there is a thermal conduction lag between the temperature measurement point and the heating element. Sudden changes in airflow speed first alter heat dissipation conditions, then affect the heating element temperature, and the protection response is also affected by local heat accumulation. Conventional methods, by directly writing these responses to the current sampling location, easily mistake the lag temperature measurement value for the current heating element temperature and airflow disturbances for sudden temperature changes, resulting in predicted temperatures that are too high or too low, false triggering of protection, or missed detection of over-temperature conditions. This affects operational status monitoring, process control, advanced control, over-temperature safety protection, and energy efficiency control.

[0043] In this embodiment, the operating status, temperature measurement status, airflow status, and protection status of the heating element are collected to form multi-source sampling data for a temperature prediction model. The operating status of the heating element includes heating power level, duty cycle change, heating element resistance change, and energization status; the temperature measurement status includes the temperature sampling value at the measurement point and the direction of temperature change; the airflow status includes the fan speed change, inlet resistance change, and outlet airflow change; the protection status includes the temperature control protection trigger status, temperature limit response status, and protection fallback status after shutdown. The above data is used to generate a blower operation sequence according to the sampling time and is entered into the air-thermal misalignment liquid time constant network as a big data analysis object. Before the data enters the network, it is not directly used for temperature prediction according to the original sampling position. Instead, the heating element of the blower is used as the sole evolutionary master position, and the temperature measurement response, airflow response, and protection response are reversed and linked to the early position segment of the heating element, the segment before the airflow change, and the neighboring segment of the heating element to obtain the misalignment master chain. The above processing enables the temperature measurement data, airflow data, and protection data collected by the intelligent sensor to be rearranged around the actual thermal changes of the heating element, providing a stable temperature trajectory for subsequent intelligent control and over-temperature safety protection.

[0044] This embodiment uses the operating status, temperature measurement status, airflow status, and protection status of the heating element as multi-source sampling data, and forms a temperature prediction model based on the temperature status of the heating element through dynamic modeling. A heat-air misalignment liquid time constant network is used to fuse the heating element's heating mechanism, the airflow's heat dissipation mechanism, and the temperature measurement lag mechanism, forming a robust prediction process after mechanistic model fusion. The above processing further incorporates the heating element's heating mechanism, the airflow's heat dissipation mechanism, and the temperature measurement lag mechanism into the same prediction process, providing a stable temperature trajectory for subsequent process control, advanced control, fault prediction and health management, and PHM (Prognostics and Health Management) assessment.

[0045] During application, the temperature measurement response no longer directly covers the current temperature state of the heating element, but is instead attached to the temperature change segment of the heating element before the sampling position corresponding to the temperature measurement response, to compensate for the temperature measurement lag. The airflow response is not directly used as the source of temperature abrupt changes, but is attached to the segment before the airflow change, to determine the actual impact of the airflow change on the heat dissipation time constant. The protection response is attached to the neighboring segment of the heating element to verify whether the thermal state around the heating element is consistent with the trajectory on the temperature measurement side. After the misaligned main chain is fed into the air-thermal misaligned liquid time constant network, the network reads the temperature state of the heating element, the temperature measurement response, the airflow response, and the protection response in the sampling sequence along the misaligned main chain, generating the heating time constant, heat dissipation time constant, and temperature measurement time constant respectively, so that the temperature state of the heating element evolves continuously along the misaligned main chain.

[0046] When the airflow response changes abruptly, this invention maintains the temperature state of the heating element unchanged and performs a counterfactual track switching using the airflow response before the change. This separates the heat dissipation disturbance caused by the airflow change from the actual temperature change of the heating element. If the track switching difference meets the disturbance isolation condition, only the track switching difference is allowed to correct the heat dissipation time constant; the track switching difference is not allowed to rewrite the temperature state of the heating element or the temperature measurement time constant. In actual operation, when the blower inlet is briefly blocked or the air outlet angle changes, conventional methods easily misjudge airflow fluctuations as a rapid increase in the temperature of the heating element. This invention, through unidirectional correction grooves and locking grooves, can limit the airflow disturbance to the heat dissipation time constant, and the prediction result is closer to the actual thermal change of the heating element.

[0047] During the shutdown rebound phase, residual heat continues to be released even after the heating element stops heating. Conventional methods only observe a decrease in the temperature measurement response, easily leading to the assumption that the heating element temperature has rapidly dropped, resulting in a weak assessment of residual heat accumulation. This invention reverses the downward trend of the temperature measurement and protection responses during shutdown rebound, returning them to the pre-shutdown heating segment. Differential verification is used to check the heating element temperature state retained within the pre-shutdown heating segment. If the temperature measurement or protection response changes in direction inconsistent with the heating element temperature state, the corresponding heating element temperature state enters the freezing tank and is not included in subsequent trajectory selection. This avoids misjudgments of residual heat caused by rapid cooling of the measurement point after shutdown, while also preserving the counter-evidence from the protection response regarding localized residual heat accumulation.

[0048] Under the same testing caliber, conventional temperature prediction methods were compared with the method of this invention. The test subjects covered low airflow heating, high airflow stable operation, airflow obstruction, cooling / heating switching, and shutdown / rebound operation. Each set of data was processed at the same sampling frequency, and the actual temperature of the heating element was used as a control value from an independent temperature measurement circuit. The test results were used to verify the effectiveness of this invention in monitoring the operating status of smart home appliances, temperature prediction models, robust control, fault prediction and health management, health management (PHM), over-temperature safety protection, and airflow disturbance suppression.

[0049] Table 1: Comparison of the Implementation Effects of Heating Element Temperature Prediction

[0050] As shown in Table 1, the present invention significantly improves the temperature prediction error. The average absolute error of conventional temperature prediction methods is 6.8℃, while that of the present invention is reduced to 2.1℃, and the peak temperature prediction error is also reduced from 10.4℃ to 3.2℃. This indicates that after the temperature measurement response is reversed, the lagging temperature measurement value is no longer directly written to the current sampling position. The temperature state of the heating element can be continuously updated along the misaligned main chain, and the prediction trajectory is closer to the temperature change of the heating element itself.

[0051] The average error after a sudden change in the airflow path decreased from 8.6℃ to 2.7℃, and the number of false triggers for protection decreased from 31 times per thousand operations to 9 times per thousand operations. This data demonstrates that counterfactual track switching and disturbance isolation can limit short-term disturbances caused by changes in the airflow path to within the heat dissipation time constant, preventing the airflow path response from directly altering the temperature state of the heating element. When operating conditions such as obstructed airflow, sudden changes in airflow volume, or changes in airflow resistance occur, this invention does not immediately interpret the airflow path change as an abnormal increase in the temperature of the heating element, resulting in more stable protection actions.

[0052] The overheating near-state recognition rate improved from 76.5% to 94.8%, and the number of missed overheating detections decreased from 18 per 1000 operations to 4 per 1000 operations. This result is related to the protection response counter-evidence screening and freezing tank processing. When the temperature measurement side trajectory and the protection side trajectory show inconsistent changes in the same sampling sequence position, this invention retains the temperature trajectory of the heating element on the protection side and writes the temperature state of the heating element corresponding to the inconsistent segment into the freezing tank. This can reduce the erroneous trajectories caused by temperature measurement lag or local airflow changes from entering the final prediction result.

[0053] The accuracy rate of residual heat detection during shutdown rebound increased from 79.2% to 95.1%. This indicates that the present invention has a stronger ability to identify the residual heat release process after shutdown. After shutdown, the temperature measurement response and protection response will decrease as residual heat is released. The present invention reverses this downward trend back to the pre-shutdown heating segment, and then uses differential locking to determine whether residual heat accumulation in the heating element is valid. This avoids mistaking a drop in temperature at the measurement point for the disappearance of residual heat in the heating element.

[0054] The average time for a single prediction increased from 18.6ms to 20.9ms, an increase of 2.3ms. This increase primarily stems from the construction of the misaligned main chain, counterfactual track switching, and freeze slot processing. Although the computational load increased, the pass rate of continuously running stable samples improved from 87.3% to 96.6%, indicating that this invention, through dynamic modeling, mechanistic model fusion, and robust control processing, achieves a more stable temperature trajectory and more reliable protection judgments, supporting process control, advanced control, and fault prediction and health management in smart home appliance scenarios.

[0055] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A method for predicting the temperature of a hair dryer's heating element based on big data, characterized in that, Includes the following steps: Using the heating element of the hair dryer as the sole evolutionary master position, the temperature measurement response in the hair dryer's operating sequence is reversed and connected to the earlier segment of the heating element, the air path response is reversed and connected to the segment before the air path change, and the protection response is reversed and connected to the segment adjacent to the heating element, thus obtaining the misaligned master chain. The misaligned main chain is fed into the wind-heat misaligned liquid time constant network, so that the temperature state of the heating element evolves continuously along the misaligned main chain, generating heating time constant, heat dissipation time constant, and temperature measurement time constant. In continuous evolution, unidirectional anchoring is performed on the heating time constant, heat dissipation time constant, and temperature measurement time constant, and the temperature measurement response and wind path response are prohibited from overwriting the anchored time constant in the current prediction window. When the air path changes, the temperature of the heating element remains constant. The air path response is replaced with the air path response before the change. Counterfactual track switching is performed to obtain the track switching difference. When the track switching difference triggers disturbance isolation, the heat dissipation time constant is corrected according to the track switching difference, and the track switching difference is prohibited from rewriting the temperature state of the heating element and the temperature measurement time constant. During shutdown and rebound, the temperature measurement response and protection response are redirected to the pre-shutdown heating segment to verify the residual heat accumulation of the heating element. The temperature status of the heating element that fails the verification is sent to the freezing tank. The temperature trajectory of the heating element is selected from the temperature status of the heating element that has never entered the freezing tank. When the screening results of the heating element temperature trajectory by the protection response and the temperature measurement response are inconsistent, the heating element temperature trajectory is screened by the protection response to obtain the predicted temperature of the heating element.

2. The method for predicting the temperature of a hair dryer heating element based on big data according to claim 1, characterized in that, The process of forming the hair dryer operation sequence specifically includes: Record the operating status, temperature measurement status, air path status, and protection status of the hair dryer's heating element according to the sampling time; Write the operating status of the hair dryer's heating element to the temperature status of the heating element; Write the temperature measurement status into the temperature measurement response and configure the reverse connection entry of the early segment of the heating element for the temperature measurement response. Write the wind path status into the wind path response, and configure the reverse hook entry for the segment before the wind path change in the wind path response; Write the protection status into the protection response and configure the reverse hook entry for the heating element neighborhood segment in the protection response; The blower operation sequence is generated according to the sampling order of the heating element temperature status, temperature measurement response, air path response, protection response, and the corresponding reverse connection port.

3. The method for predicting the temperature of a hair dryer heating element based on big data according to claim 1, characterized in that, The process of obtaining the misaligned main chain specifically includes: Starting from the sampling position corresponding to the heating element of the hair dryer, the sampling positions corresponding to the temperature measurement response, the air path response, and the protection response are read from the hair dryer operation sequence. The temperature measurement misalignment step number is obtained by tracing back from the starting position to the sampling position where the temperature measurement response changes continuously. The temperature measurement response is then reversed and connected to the early segment of the heating element according to the temperature measurement misalignment step number. The number of wind path misalignment steps is obtained by tracing back from the starting position to the sampling position where the wind path response changes. The wind path response is then reversed and attached to the segment before the wind path change according to the number of wind path misalignment steps. The protection misalignment step number is obtained by tracing back from the starting position to the sampling position where the protection response changes continuously. The protection response is then reversed and connected to the neighboring segment of the heating element according to the protection misalignment step number. The main chain is formed by the sampling order after reverse splicing.

4. The method for predicting the temperature of a hair dryer heating element based on big data according to claim 3, characterized in that, The process of continuously evolving the temperature state of the heating element along the misaligned main chain specifically includes: The shielded temperature measurement response, airflow response, and protection response are directly written to the temperature status of the heating element at the original sampling location; The temperature measurement misalignment step count, airflow misalignment step count, and protection misalignment step count respectively form the temperature measurement misalignment push window, airflow misalignment push window, and protection misalignment push window; The early segment of the heating element occupies the current sampling position in the misaligned main chain, driving the heating time constant to advance the temperature state of the heating element; The temperature measurement response occupies the temperature measurement error advance window and drives the temperature measurement time constant to correct the temperature state of the heating element. The air path response occupies the air path misalignment and push window, driving the heat dissipation time constant to return the temperature status of the heating element; The protection response occupies the protection error advance window and performs neighborhood verification on the neighboring segments of the heating element; When the same sampling location is occupied by one of the heating time constant, heat dissipation time constant, or temperature measurement time constant, the writing entry of the remaining time constant at the same sampling location shall be closed according to the first-occupancy-first-close rule. The temperature state of the heating element is continuously evolved according to the misaligned main chain after occupation.

5. The method for predicting the temperature of a hair dryer heating element based on big data according to claim 1, characterized in that, The process of forming the current prediction window specifically includes: Using the current sampling position in the misaligned main chain as the starting point of the window, continuous evolution positions along the misaligned main chain are extracted as candidate prediction windows; If a freezing tank record exists, the misaligned main chain position corresponding to the temperature state of the heating element in the freezing tank will be removed from the candidate prediction window. The eliminated consecutive evolution positions are arranged in the order of sampling to obtain the current prediction window.

6. The method for predicting the temperature of a hair dryer heating element based on big data according to claim 1, characterized in that, The unidirectional anchoring of the heating time constant, heat dissipation time constant, and temperature measurement time constant during continuous evolution specifically includes: The heating time constant is anchored to the early segment of the heating element, the heat dissipation time constant is anchored to the segment before the change of the air path, and the temperature measurement time constant is anchored to the early segment of the heating element after the temperature measurement response is reversed. After the anchoring is completed, the reverse coverage entrances corresponding to the heating time constant, heat dissipation time constant, and temperature measurement time constant are closed within the current prediction window, and the anchoring results are maintained until the end of the current prediction window; When the temperature measurement response and the airflow response enter the reverse coverage entrance corresponding to the riveted time constant along the reverse coverage direction, the coverage of the riveted time constant by the temperature measurement response and the airflow response is blocked. Based on the heating time constant, heat dissipation time constant, and temperature measurement time constant after the blocking coverage, the temperature state of the heating element is maintained to evolve continuously along the misaligned main chain.

7. The method for predicting the temperature of a hair dryer heating element based on big data according to claim 1, characterized in that, The process of performing a counterfactual track switch to obtain track switch differences specifically includes: When the airflow path changes, the temperature state of the heating element before the change is locked, preventing the immediate rewriting of the temperature state of the heating element due to the change in the airflow path. Replace the wind path response with the wind path response before the change, and drive the heat dissipation time constant to perform a counterfactual track switching along the segment before the wind path change. Using the temperature state of the heating element before the change as the locking benchmark, the heat dissipation time constant after the counterfactual track switching is locked with the heat dissipation time constant when the air path changes, and the track switching difference is obtained. The track switching difference is retained as the basis for triggering disturbance isolation.

8. The method for predicting the temperature of a hair dryer heating element based on big data according to claim 7, characterized in that, When the track switching difference triggers disturbance isolation, it specifically includes: Write the track switching difference into the unidirectional correction slot of the heat dissipation time constant; Write the temperature status of the heating element into the temperature status lock slot of the heating element, and write the temperature measurement time constant into the temperature measurement time constant lock slot. The one-way correction slot only opens the correction outlet pointing to the heat dissipation time constant, and closes the write-back outlet pointing to the temperature status lockout slot of the heating element and the temperature measurement time constant lockout slot. The heat dissipation time constant is obtained by correcting the track switching difference in the unidirectional correction slot; The isolation heat dissipation time constant is used as the corrected heat dissipation time constant in subsequent continuous evolution.

9. The method for predicting the temperature of a hair dryer heating element based on big data according to claim 1, characterized in that, During the shutdown rebound, the temperature measurement response and protection response are fed back to the pre-shutdown heating segment to verify the residual heat accumulation of the heating element, specifically including: When a shutdown rebound occurs, the end position of the pre-shutdown heating segment is locked as the reversal endpoint; The temperature measurement response is reversed during the shutdown rebound, and the temperature state of the heating element before the reversal point is obtained; The protection response is reversed during the shutdown rebound, and the temperature state of the heating element before the reversal point is obtained; The temperature measurement turnaround state and the protection turnaround state are differentially matched with the temperature state of the heating element before the turnaround endpoint to verify the residual heat accumulation of the heating element. When differential engagement fails, the temperature status of the corresponding heating element is written into the freezing tank. When the differential engagement is successful, the temperature status of the corresponding heating element will be retained as that of the heating element that has not entered the freezing tank.

10. The method for predicting the temperature of a hair dryer heating element based on big data according to claim 1, characterized in that, The method of using protection response to perform reverse verification screening of the temperature trajectory of the heating element specifically includes: The temperature trajectory of the heating element is traced along the temperature measurement response and the protection response respectively in the temperature state of the heating element that has never entered the freezing tank, so as to obtain the temperature trajectory of the heating element on the temperature measurement side and the temperature trajectory of the heating element on the protection side. The temperature trajectory of the heating element on the temperature measuring side and the temperature trajectory of the heating element on the protection side are matched bit by bit at the same sampling sequence position; When the components are locked in place, the temperature trajectory of the heating element on the temperature measuring side is retained as the temperature trajectory of the heating element. When the interlocking is inconsistent, the temperature state of the heating element corresponding to the segment in the temperature trajectory of the heating element on the temperature measuring side that is inconsistent with the temperature trajectory of the heating element on the protection side is written into the freezing tank, and the temperature trajectory of the heating element on the protection side is retained as the temperature trajectory of the heating element. The predicted temperature of the heating element is obtained from the retained temperature trajectory of the heating element.

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