Method and device for evaluating heating performance of heating body for electrothermal film liquid

Abstract

The invention discloses a method and a device for evaluating the heating performance of a heating body for electrothermal film liquid, and relates to the technical field of electric variable measurement of heating bodies. The method for evaluating the heating performance of the heating body for the electrothermal film liquid comprises the steps of electrothermal film voltage switching evaluation, electrothermal film load characteristic measurement and electrothermal film signal acquisition and monitoring. The method comprises the following steps: performing electrothermal film load characteristic measurement to obtain an electrothermal film load characteristic measurement result, and after the electrothermal film load characteristic measurement is qualified, performing electrothermal film signal acquisition and monitoring to obtain an electrothermal film signal acquisition and monitoring result, thereby improving the accuracy of the method for evaluating the heating performance of the heating element for the electrothermal film liquid. The problem that in the prior art, evaluation of the heating performance of a heating body for electrothermal film liquid is inaccurate is solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electric variable measurement of heating body, in particular to a heating performance evaluation method and device of heating body for electric heating film liquid. BACKGROUND

[0002] In the process of evaluating the heating performance of the heating body, such as the ceramic glue-filled heating body, first, the heating source transmits heat to the glue in the hollow shell through two wires welded on two poles, and then conducts to the heating body shell, such as ceramic, aluminum pipe, two legs, etc. First, the temperature sensor NTC (Negative Temperature Coefficient) in the signal acquisition module is accurately controlled in the environment with the preset temperature of the electric heating film on the heating body. A specific voltage is applied to the electric heating film to generate controllable electric heating excitation. Then, the temperature sensor NTC senses the temperature change of the electric heating film and outputs in the form of an electric signal. Finally, the external control unit detects the electric signal output by the temperature sensor NTC, and the power management circuit applies different voltages to the electric heating film. The sensitive elements inside the temperature sensor NTC generate corresponding weak electric signals based on the resistance-temperature dependence. After the professional pre-amplification, filtering and cold end compensation processing of the external control unit, the electric signal is converted into a thermal response signal. The collected thermal response signal is mapped to accurate temperature rise data through a preset calibration curve. The power-temperature response model is constructed by combining the temperature rise data collected by the thermal sensor, and the electric heating performance parameters of the heating body are obtained for the evaluation of the heating performance of the heating body, so as to realize accurate temperature control.

[0003] For example, the heating body material testing device, method and storage medium disclosed in the Chinese invention patent application with publication number CN119986131A include: obtaining a test mode and test parameters; when a test instruction is received, performing initial resistance value detection on the heating body material; when the heating body material passes the initial resistance value detection, performing power calibration test and / or power-on test on the heating body material according to the test mode and test parameters, and displaying the test results.

[0004] For example, the Chinese invention patent application with publication number CN101639500B discloses a method for testing the high temperature resistance of carbon / carbon heating element by indirect heating, which comprises the following steps: 1, fixing the graphite heating element on the electrode one in the resistance furnace; 2, fixing one or more carbon / carbon heating elements on the side of the graphite heating element; 3, connecting a set of positive and negative electrodes two from the furnace to the outside of the furnace on both ends of the carbon / carbon heating element; 4, clamping the measuring clip of the Kelvin bridge on a set of positive and negative electrodes two; 5, introducing protective gas into the resistance furnace; 6, indirectly heating the carbon / carbon heating element by electric heating of the graphite heating element, and continuously recording the temperature of the carbon / carbon heating element and the resistance value between the positive and negative electrodes two measured by the corresponding Kelvin bridge during heating, and drawing the resistance value change rate curve of the carbon / carbon heating element from room temperature to high temperature.

[0005] The above-mentioned technology has at least the following technical problems:

[0006] In the prior art, as the battery power gradually decreases, in order to maintain the power of the electrothermal film heating element, the power management circuit can compensate by increasing the PWM (Pulse Width Modulation) modulation frequency or switching different voltage levels. Since the electrothermal film is a resistive load, it will immediately respond to voltage fluctuations, resulting in frequent changes in output electrical signals. If the signal acquisition module is not designed with sufficient sampling pulses or filtering, the sampling pulses during power monitoring will not match the electrical signal change frequency, resulting in incomplete current, voltage and power data collected by the signal acquisition module (such as ammeter, voltmeter and power meter), which will lead to inaccurate power-temperature response model constructed by combining temperature sensor obtained temperature rise data and current, voltage and power data, further leading to inaccurate evaluation of heating performance of the heating element based on the obtained power-temperature response model, thereby existing the problem of inaccurate evaluation of heating performance of the electrothermal film heating element. SUMMARY

[0007] In order to solve the technical problem of inaccurate evaluation of heating performance of the electrothermal film liquid heating element in the prior art, the embodiments of the present application provide a method for evaluating the heating performance of the electrothermal film liquid heating element. The technical solution is as follows:

[0008] On the one hand, a method for evaluating the heating performance of the electrothermal film liquid heating element is provided, which comprises the following steps:

[0009] In the process of evaluating the heating performance of the heating body, the voltage switching evaluation of the electrothermal film is performed to obtain the voltage switching evaluation result of the electrothermal film, which reflects the qualification degree of the voltage switching of the electrothermal film, and whether to perform the voltage switching optimization of the electrothermal film is determined according to the obtained voltage switching evaluation result of the electrothermal film, and the voltage switching optimization of the electrothermal film includes the switching voltage phase alignment operation for improving the qualification degree of the switching voltage phase alignment of the electrothermal film and the electrothermal film noise adjustment for reducing the noise interference of the switching voltage of the electrothermal film, and the electrothermal film represents a functional element in the heating body for generating heat; after the voltage switching evaluation of the electrothermal film is completed, the load characteristic measurement of the electrothermal film is performed to obtain the load characteristic measurement result of the electrothermal film, which reflects the qualification degree of the load characteristic of the electrothermal film, and whether to perform the load characteristic maintenance operation is determined according to the obtained load characteristic measurement result of the electrothermal film, and the load characteristic maintenance operation is used to ensure the load stability of the electrothermal film to improve the monitoring precision of the electrothermal film; after the load characteristic measurement of the electrothermal film is qualified, the signal acquisition monitoring of the electrothermal film is performed to obtain the signal acquisition monitoring result of the electrothermal film, which reflects the qualification degree of the signal acquisition monitoring of the electrothermal film, and whether to meet the qualified condition of the signal acquisition monitoring of the electrothermal film is determined, if yes, the heating performance evaluation of the heating body is performed to evaluate the heating performance of the heating body, otherwise, the signal acquisition optimization of the electrothermal film is performed to improve the stability of the signal acquisition of the electrothermal film.

[0010] In another aspect, a heating device for electrothermal film liquid is provided, which applies the heating performance evaluation method of the electrothermal film liquid heating body, and includes a cover, a plug seat assembly, a heating body assembly, a base, a circuit board and a button. The cover covers the heating body assembly, the base and the circuit board, and is used for conducting the heat energy of the heating body assembly. The plug seat assembly is used for connecting the power supply to provide the heating body with electric energy. The heating body assembly includes a plastic support, an electrothermal film, an NTC probe and a power line. The plastic support is in point contact with the electrothermal film, and is used for fixing the electrothermal film. The electrothermal film is in the form of a ring and is inserted into the plastic support, and is used for converting the received electric energy into heat energy. The NTC probe is installed on the surface of the ring-shaped electrothermal film, and is used for collecting the temperature of the electrothermal film in real time. The power line is connected with the electrothermal film and the plug seat assembly, and is used for transmitting electric energy. The base is used for fixing the plug seat assembly, the heating body assembly, the circuit board and the button above. The circuit board is used for receiving the electric signal of the electrothermal film collected by the NTC probe, analyzing the electric signal and controlling the heating and cooling of the electrothermal film. The button is used for controlling the opening and closing of the electrothermal film liquid heating body.

[0011] The technical scheme provided by the embodiment of the present application has at least the following beneficial effects:

[0012] 1、By executing the electrothermal film voltage switching evaluation to obtain the electrothermal film voltage switching evaluation result, judging whether to perform the electrothermal film voltage switching optimization according to the obtained electrothermal film voltage switching evaluation result, helping to accurately evaluate the electrothermal film voltage switching situation, improving the stability of the electrothermal film voltage switching, reducing the inaccuracy of the electrothermal film electric signal collection caused by switching noise, ensuring the accuracy of the electrothermal film voltage switching frequency to improve the stability of the heating body work, by executing the electrothermal film load characteristic measurement to obtain the electrothermal film load characteristic measurement result, judging whether to perform the load characteristic stability operation according to the obtained electrothermal film load characteristic measurement result, helping to accurately evaluate the electrothermal film load characteristic situation, improving the eligibility of the electrothermal film work, avoiding incomplete electrothermal film electric signal collection caused by fast electrothermal film load characteristic change, ensuring the reliability of the electrothermal film electric signal to improve the accuracy of the heating body work, by executing the electrothermal film signal collection monitoring to obtain the electrothermal film signal collection monitoring result, judging whether to meet the electrothermal film signal collection monitoring qualified condition according to the obtained electrothermal film signal collection monitoring result, helping to accurately evaluate the eligibility of the electrothermal film electric signal collection monitoring, improving the accuracy of the electrothermal film electric signal collection, reducing incomplete electrothermal film electric signal collection caused by fast electric signal change frequency, ensuring the eligibility of the electrothermal film electric signal collection, so as to realize the improvement of the electrothermal film liquid heating body heating performance evaluation accuracy.

[0013] 2、The electrothermal film load characteristic measurement result reflecting the eligibility of the electrothermal film load characteristic is obtained by harmonic average processing of the electrothermal film resistance change result and the electric signal change frequency result. Compared with the prior art, since the electrothermal film is a resistive load, it will respond to voltage fluctuations immediately, resulting in frequent changes in output electric signal, which leads to inaccurate electrothermal film electric signal collection. The present application helps to improve the stability of the electrothermal film load characteristic change by harmonic average processing, reduces the high frequency noise and fluctuation of the electrothermal film electric signal, ensures the eligibility of the electrothermal film load characteristic change, and increases the reliability and accuracy of the electrothermal film electric signal output.

[0014] 3、The electrothermal film signal collection monitoring result reflecting the eligibility of the electrothermal film signal collection monitoring is obtained by harmonic average of the electric signal time sequence offset result and the electrothermal film load characteristic measurement index. Compared with the prior art, since the signal collection module sampling pulse or filter design is insufficient, the sampling pulse and the electric signal change frequency do not match when performing electric quantity monitoring, resulting in incomplete current, voltage and power data collected by the signal collection module. The present application helps to improve the anti-interference ability of the electrothermal film electric signal in the collection process by harmonic average processing, thereby improving the integrity of the electrothermal film electric signal collection and ensuring the stability of the electrothermal film electric signal collection, thereby improving the heating performance evaluation accuracy of the heating body. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1A flow chart of a heating performance evaluation method of a heating body for an electrothermal film liquid provided in an embodiment of the present application is shown in the figure.

[0016] Figure 2 An architecture schematic diagram of a heating performance evaluation method of a heating body for an electrothermal film liquid provided in an embodiment of the present application is shown in the figure.

[0017] Figure 3 A heating body input power-heating body heat curve diagram of a heating performance evaluation method of a heating body for an electrothermal film liquid provided in an embodiment of the present application is shown in the figure.

[0018] Figure 4 A structure schematic diagram of a heating performance evaluation device of a heating body for an electrothermal film liquid provided in an embodiment of the present application is shown in the figure.

[0019] Figure 5 A heating body component structure schematic diagram of a heating performance evaluation device of a heating body for an electrothermal film liquid provided in an embodiment of the present application is shown in the figure.

[0020] Figure 6 A structure schematic diagram of a heating performance evaluation device of a heating body for an electrothermal film liquid provided in an embodiment of the present application is shown in the figure.

[0021] Figure 7 A heating body input power-heating body heat curve diagram of a heating performance evaluation method of a heating body for an electrothermal film liquid provided in an embodiment of the present application is shown in the figure.

[0022] Figure 8 A heating body input power-heating body heat curve diagram of a heating performance evaluation method of a heating body for an electrothermal film liquid provided in an embodiment of the present application is shown in the figure.

[0023] Figure 9 A heating body input power-heating body heat curve diagram of a heating performance evaluation method of a heating body for an electrothermal film liquid provided in an embodiment of the present application is shown in the figure. DETAILED DESCRIPTION

[0024] The technical solutions in the present application will be described below with reference to the drawings.

[0025] In the embodiments of the present application, the words such as "example", "for example" are used to represent an example, illustration or description. Any embodiment or design scheme described as "example" in the present application should not be interpreted as more preferred or more advantageous than other embodiments or design schemes. In fact, the word "example" is intended to present the concept in a specific way. In addition, in the embodiments of the present application, the meaning expressed by "and / or" can be both, or can be one of the two.

[0026] In the embodiments of the present application, "image" and "picture" can be used interchangeably at times. It should be pointed out that when the distinction is not emphasized, the meanings expressed are consistent. "Of", "corresponding" and "relevant" can be used interchangeably at times. It should be pointed out that when the distinction is not emphasized, the meanings expressed are consistent.

[0027] To make the technical problems, technical solutions and advantages to be solved by the present application clearer, specific embodiments will be described in detail below with reference to the drawings.

[0028] The embodiments of the present application provide a heating performance evaluation method for a heating body for an electrothermal film liquid, as shown in a flow chart of a heating performance evaluation method for a heating body for an electrothermal film liquid, comprising the following steps: Figure 1

[0029] The electrothermal film voltage switching evaluation is performed to obtain an electrothermal film voltage switching evaluation result. Whether the electrothermal film voltage switching evaluation result meets the electrothermal film voltage switching qualified condition is judged, and whether the electrothermal film voltage switching optimization is performed is judged. If the electrothermal film voltage switching evaluation result meets the electrothermal film voltage switching qualified condition, the electrothermal film signal acquisition monitoring is performed. Otherwise, the electrothermal film voltage switching optimization is performed. The execution of the electrothermal film voltage switching evaluation helps to accurately evaluate the electrothermal film voltage switching condition, ensures the accuracy of the electrothermal film voltage switching frequency, and thus improves the stability of the heating body work.

[0030] The electrothermal film load characteristic measurement is performed to obtain an electrothermal film load characteristic measurement result. Whether the electrothermal film load characteristic measurement result meets the electrothermal film load characteristic measurement qualified condition is judged, and whether the load characteristic maintenance operation is performed is judged. If the electrothermal film load characteristic measurement result meets the electrothermal film load characteristic measurement qualified condition, the electrothermal film signal acquisition monitoring is performed. Otherwise, the load characteristic maintenance operation is performed. The execution of the electrothermal film load characteristic measurement helps to accurately measure the electrothermal film load characteristic condition, ensures the reliability of the electrothermal film electrical signal, and thus improves the accuracy of the heating body work.

[0031] The electrothermal film signal acquisition monitoring is performed to obtain an electrothermal film signal acquisition monitoring result and judge whether it meets the electrothermal film signal acquisition monitoring qualified condition. If the electrothermal film signal acquisition monitoring result meets the electrothermal film signal acquisition monitoring qualified condition, the heating performance evaluation for the heating body is performed. Otherwise, the electrothermal film signal acquisition optimization is performed. The execution of the electrothermal film signal acquisition monitoring helps to accurately measure the qualified degree of the electrothermal film electrical signal acquisition monitoring, ensures the qualification of the electrothermal film electrical signal acquisition, and thus improves the accuracy of the heating performance evaluation of the heating body for the electrothermal film liquid.

[0032] As shown in Figure 2 ​As shown, the architecture schematic diagram of the heating performance evaluation method of the heating element for the electrothermal film liquid provided by the embodiment of the application is shown. First, the electrothermal film voltage switching evaluation is performed to determine whether the electrothermal film voltage switching evaluation result meets the electrothermal film voltage switching qualified condition. If yes, the electrothermal film signal acquisition monitoring is performed. Otherwise, the electrothermal film voltage switching optimization is performed. It is determined whether the re-acquired electrothermal film voltage switching evaluation result after the electrothermal film voltage switching optimization meets the electrothermal film voltage switching qualified condition. If yes, the electrothermal film signal acquisition monitoring is performed. Otherwise, the electrothermal film load characteristic measurement is performed. Then, it is determined whether the electrothermal film load characteristic measurement result meets the electrothermal film load characteristic measurement qualified condition. If yes, the electrothermal film signal acquisition monitoring is performed. Otherwise, the load characteristic maintenance operation is performed. It is determined whether the re-acquired electrothermal film load characteristic measurement result after the load characteristic maintenance operation meets the electrothermal film load characteristic measurement qualified condition. If yes, the electrothermal film signal acquisition monitoring is performed. Otherwise, the load characteristic maintenance operation abnormality prompt is sent to the preset personnel. Finally, the electrothermal film signal acquisition monitoring is performed. It is determined whether the electrothermal film signal acquisition result meets the electrothermal film signal acquisition monitoring qualified condition. If yes, the heating performance evaluation of the heating element is performed. Otherwise, the electrothermal film signal acquisition optimization is performed. It is determined whether the re-acquired electrothermal film signal acquisition monitoring result after the electrothermal film signal acquisition optimization meets the electrothermal film signal acquisition monitoring qualified condition. If yes, the heating performance evaluation of the heating element is performed. Otherwise, the electrothermal film signal acquisition optimization abnormality prompt is sent to the preset personnel.

[0033] It should be noted that, in the application, a database for storing various types of setting data is established before designing the heating performance evaluation method of the heating element for the electrothermal film liquid. The database includes, but is not limited to, preset electrothermal film voltage switching evaluation results, preset electrothermal film voltage switching frequencies, preset electrothermal film load characteristic measurement results, etc. The various types of values are directly set by technical personnel.

[0034] In the embodiment, the electrothermal film voltage switching evaluation is performed to obtain the electrothermal film voltage switching evaluation result, which is used to measure the stability of the electrothermal film voltage switching to improve the reliability of the power management circuit in compensating for the switching of different voltage grades. After the electrothermal film voltage switching optimization abnormality, the electrothermal film load characteristic measurement is performed to obtain the electrothermal film load characteristic measurement result, which is used to measure the qualified degree of the change of the electrothermal film load characteristic to reduce the fluctuation of the instant response voltage and the output signal. Finally, after the electrothermal film load characteristic measurement is qualified, the electrothermal film signal acquisition monitoring is performed to obtain the electrothermal film signal acquisition monitoring result and determine whether to perform the heating performance evaluation of the heating element, which is used to measure the accuracy of the electrothermal film signal acquisition to improve the matching degree of the sampling pulse and the signal change frequency, thereby improving the accuracy of the heating performance evaluation of the heating element for the electrothermal film liquid.

[0035] Further, the specific process of determining whether to perform the electrothermal film voltage switching optimization according to the obtained electrothermal film voltage switching evaluation result is as follows: the electrothermal film voltage stability and the preset electrothermal film voltage stability are quantified by the proportion, that is, the ratio operation to obtain the electrothermal film voltage switching evaluation result, and the preset electrothermal film voltage stability is represented by the average value of the electrothermal film voltage stability in the historical time period; whether the obtained electrothermal film voltage switching evaluation result meets the electrothermal film voltage switching qualified condition is determined; the electrothermal film voltage stability is represented by the proportion quantified result of the preset electrothermal film voltage switching frequency and the switching frequency of the electrothermal film voltage at the preset electrothermal film voltage input end point in the preset electrothermal film voltage switching evaluation time period monitored by the high-precision oscilloscope, which is used to reflect the qualified degree of the electrothermal film voltage switching frequency, and the preset electrothermal film voltage switching frequency is represented by the average value of the electrothermal film voltage switching frequency in the historical time period; the preset electrothermal film voltage switching evaluation time period represents the preset time period corresponding to the execution of the electrothermal film voltage switching evaluation set in advance by the preset personnel; the electrothermal film voltage switching qualified condition represents that the electrothermal film voltage switching evaluation result is greater than the preset electrothermal film voltage switching evaluation result, and the preset electrothermal film voltage switching evaluation result is represented by the average value of the electrothermal film voltage switching evaluation result in the historical time period; if the electrothermal film voltage switching evaluation result meets the electrothermal film voltage switching qualified condition, the electrothermal film signal acquisition monitoring is performed, otherwise, the electrothermal film voltage switching optimization is performed; the electrothermal film voltage switching optimization represents the optimization corresponding to the next execution of the electrothermal film voltage switching evaluation.

[0036] In the embodiment, by performing the electrothermal film voltage switching evaluation, the qualified degree of the electrothermal film voltage switching can be effectively evaluated, the accuracy of the transient characteristics and the steady state of the voltage is ensured, and a stable voltage basis is provided for the acquisition of the electrothermal film signal, thereby improving the instantaneous stability and long-term accuracy of the electrothermal film signal, ensuring the quality of the subsequently acquired electrothermal film signal, and further improving the stability and accuracy of the electrothermal film signal.

[0037] Further, the specific process of the electric heating film voltage switching optimization is as follows: a switching voltage phase alignment operation is performed: based on a CPLD (Complex Programmable Logic Device), the phase of the electric signal corresponding to the electric heating film voltage converted by an AD (Analog-to-Digital Converter) is mapped in a preset phase range, and an electric heating film noise adjustment is performed through an average filter; the electric heating film noise adjustment indicates that the amplitude corresponding to the preset window moving average length proportion is taken as an adjustment step to gradually increase the window moving average length, and the gradual increase of the window moving average length helps to retain the details of the electric heating film electric signal, so as to achieve the noise suppression effect, and the window moving average length is monitored through a programmable logic controller; the preset window moving average length proportion is obtained by inputting the electric heating film voltage switching evaluation result and the average voltage value into a moving length average mapping set; the moving length average mapping set is used to reflect the mapping relationship between the electric heating film voltage switching evaluation result and the average voltage value and the corresponding preset window moving average length proportion, and the real-time running data of the electric heating film, such as the voltage switching evaluation result and the average voltage value, can be used to quickly and accurately determine the data smoothing processing parameter most suitable for the current heating body operation, so as to improve the stability control and state optimization of the heating body operation; the moving length average mapping set is set in advance by a preset person according to historical experience to gradually filter out the mapping set corresponding to the electric heating film voltage switching noise, and the average voltage value is represented by the average value of the instantaneous voltage of the electric heating film at both ends collected by a voltmeter in a preset electric heating film voltage switching evaluation period; if the electric heating film voltage switching evaluation result reacquired after the electric heating film voltage switching optimization meets the electric heating film voltage switching qualified condition, the electric heating film signal acquisition monitoring is performed, otherwise, the electric heating film load characteristic measurement is performed.

[0038] It should be noted that, as shown in Figure 3 the framework diagram of the electric heating film liquid heating body heating performance evaluation method provided by the embodiment of the present application, the electric heating film voltage switching optimization includes: performing a switching voltage phase alignment operation and performing an electric heating film noise adjustment, and judging whether the electric heating film voltage switching evaluation result reacquired after the electric heating film voltage switching optimization meets the electric heating film voltage switching qualified condition, if it does, performing the electric heating film signal acquisition monitoring, otherwise, performing the electric heating film load characteristic measurement.

[0039] In the embodiment, the optimization of the electrothermal film voltage switching by performing the electrothermal film voltage switching helps to weaken the introduction of noise, improve the suppression effect of voltage switching noise, reduce the influence of noise peaks on voltage switching, reduce the loss and distortion of electrothermal film electrical signal characteristics caused by excessive filtering, improve the signal-to-noise ratio of the electrothermal film electrical signal, ensure the accuracy and stability of the subsequent electrothermal film electrical signal acquisition, and improve the reliability and consistency of the electrothermal film electrical signal.

[0040] Further, the specific process of performing the electrothermal film load characteristic measurement is as follows: the electrothermal film load characteristic measurement result is obtained by harmonic average processing of the electrothermal film resistance change result and the electrical signal change frequency result; when the current passes through the electrothermal film of the heating body to generate Joule heat, the temperature rise causes the vibration of the electrothermal film metal lattice to intensify, the probability of free electron scattering increases, and the electrothermal film resistance value increases with temperature, which means that the electrothermal film resistance change result increases, and the cutoff frequency decreases due to the increase of the electrothermal film resistance, thereby causing the high-frequency component of the electrothermal film electrical signal to attenuate faster, which means that the greater the electrical signal change frequency result, the more the electrothermal film load characteristic measurement result is judged based on the obtained electrothermal film load characteristic measurement result to determine whether it meets the electrothermal film load characteristic measurement qualified condition; if the electrothermal film load characteristic measurement result meets the electrothermal film load characteristic measurement qualified condition, the electrothermal film signal acquisition monitoring is performed, otherwise, the load characteristic maintenance operation is performed; the electrothermal film load characteristic measurement qualified condition means that the electrothermal film load characteristic measurement result is greater than the preset electrothermal film load characteristic measurement result, and the preset electrothermal film load characteristic measurement result is represented by the average value of the electrothermal film load characteristic measurement results in the historical time period; the electrothermal film resistance change result is quantified by the preset electrothermal film resistance change rate and the electrothermal film resistance change rate, and then combined with the resistance control rate for reflecting the degree of influence of the electrothermal film resistance change result on the electrothermal film load characteristic measurement result, that is, the result of assigning weights to multiple variables, which is used to reflect the qualified degree of the electrothermal film resistance change, and the preset electrothermal film resistance change rate is represented by the average value of the electrothermal film resistance change rate in the historical time period; the electrothermal film resistance change rate is represented by the difference between the electrothermal film resistance values at the end point and the initial point of the preset electrothermal film load characteristic measurement time period monitored by the ohmmeter; the preset electrothermal film load characteristic measurement time period represents the preset time period corresponding to the electrothermal film load characteristic measurement performed by the preset personnel; the electrical signal change frequency result is quantified by the preset electrothermal film electrical signal change frequency and the electrothermal film electrical signal change frequency, and then combined with the signal change control rate for reflecting the degree of influence of the electrical signal change frequency result on the electrothermal film load characteristic measurement result, that is, the result of assigning weights to multiple variables, which is used to reflect the qualified degree of the electrothermal film electrical signal frequency change; the electrothermal film electrical signal change frequency is represented by the difference between the electrothermal film electrical signal frequencies at the end point and the initial point of the preset electrothermal film load characteristic measurement time period monitored by the oscilloscope, and the preset electrothermal film electrical signal change frequency is represented by the average value of the electrothermal film electrical signal change frequency in the historical time period.

[0041] It should be noted that by inputting the electric heating film resistance change result and the electric signal change frequency result into the mapping set respectively, wherein the electric heating film resistance change result and the electric signal change frequency result are normalized based on the data normalization algorithm, by inputting the electromagnetic interference intensity and the electric heating film resistance change result and the electric signal change frequency result obtained after data normalization into the linear regression model, fitting based on the linear regression algorithm to obtain the corresponding resistance control rate and signal change control rate, finally, the range of electromagnetic interference intensity, electric heating film resistance change result and electric signal change frequency result is mapped to the preset interval, wherein the preset interval is set in advance by the preset personnel, thereby establishing the mapping set; in this embodiment, the value range of the resistance control rate and the signal change control rate is 0 to 1, since the greater the electromagnetic interference intensity, the stronger the noise electromagnetic field acting on the conductive film, which will excite eddy current effect in the material, generate disordered circular current to produce additional Joule heat to raise the local temperature, which means the greater the electric heating film resistance change result, and will also form an equivalent parallel loss resistance to cause the total impedance phase shift change to be greater, thereby causing the electric heating film electric signal frequency to be greater, which means the greater the electric signal change frequency result.

[0042] In this embodiment, by performing the electric heating film load characteristic measurement, the qualified degree of the electric heating film load characteristic can be effectively evaluated, the effectiveness and reliability of the collected electric heating film electric signal can be ensured, the distortion or measurement error of the electric heating film electric signal caused by the mismatch of the electric heating film load characteristic can be reduced, the effectiveness of the electric heating film electric signal collection can be ensured, the collected electric heating film electric signal can truly reflect the actual working state of the heating body, thereby improving the instantaneous quality of the electric heating film electric signal and the long-term consistency of the electric heating film electric signal collection.

[0043] Further, the specific process of performing the load characteristic stability operation is as follows: based on the particle swarm optimization algorithm, the electric signal acquisition frequency resolution is adjusted, the amplitude corresponding to the preset acquisition frequency resolution ratio is taken as the adjustment step, and the electric signal acquisition frequency resolution is increased step by step; increasing the electric signal acquisition frequency resolution step by step helps to improve the precision of the electric heating film load characteristic change detection, the electric signal acquisition frequency resolution is monitored through an oscilloscope, thereby improving the accuracy of the electric heating film electric signal acquisition, and the electric signal acquisition frequency resolution is greater than the preset minimum electric signal acquisition frequency resolution; the preset acquisition frequency resolution ratio is obtained by inputting the electric heating film load characteristic measurement result and the original electric signal acquisition frequency resolution into an electric signal acquisition mapping set, the electric signal acquisition mapping set is continuously verified by the preset personnel based on the linear regression algorithm, the electric heating film load characteristic measurement result and the original electric signal acquisition frequency resolution, and the preset minimum electric signal acquisition frequency resolution is set in advance by the preset personnel; the electric signal acquisition mapping set is used to reflect the mapping relationship between the electric heating film load characteristic measurement result and the original electric signal acquisition frequency resolution and the corresponding preset acquisition frequency resolution ratio; the electric signal acquisition frequency resolution adjustment is used to improve the electric signal acquisition frequency to improve the electric heating film load characteristic monitoring precision; if the electric heating film load characteristic measurement result re-acquired after performing the load characteristic stability operation meets the electric heating film load characteristic measurement qualified condition, the electric heating film signal acquisition monitoring is performed, otherwise, a load characteristic stability operation abnormal prompt is sent to the preset personnel.

[0044] In the embodiment, by performing the electric heating film signal acquisition monitoring, the qualified degree of the electric heating film electric signal acquisition monitoring can be effectively evaluated, the reliability of the electric heating film electric signal acquisition can be improved, the electric heating film electric signal acquisition is disturbed due to the timing distortion or state mismatch in the electric heating film electric signal acquisition process, thereby effectively reducing the influence of the sampling timing jitter and the synchronization error on the integrity of the electric heating film electric signal, and ensuring the accuracy and consistency of the electric heating film electric signal acquisition.

[0045] Further, the specific process of performing the electric heating film signal acquisition monitoring is as follows: based on the acquired electric heating film signal acquisition monitoring result, it is judged whether it meets the electric heating film signal acquisition monitoring qualified condition; the electric heating film signal acquisition monitoring qualified condition means that the electric heating film signal acquisition monitoring result is greater than the preset electric heating film signal acquisition monitoring result, and the preset electric heating film signal acquisition monitoring result is represented by the average value of the electric heating film signal acquisition monitoring results in the historical time period; if the electric heating film signal acquisition monitoring result meets the electric heating film signal acquisition monitoring qualified condition, the heating body heating performance evaluation is performed, otherwise, the electric heating film signal acquisition optimization is performed.

[0046] In the embodiment, the execution of the electrothermal film signal acquisition monitoring helps to accurately evaluate the qualified degree of the electrothermal film electric signal acquisition, ensures the authenticity and integrity of the electrothermal film electric signal, thereby improving the signal-to-noise ratio and clarity of the electrothermal film electric signal, effectively reducing the random jitter and fixed deviation of the sampling trigger point, thereby reducing the phase shift of the electrothermal film electric signal, and ensuring the accuracy of the subsequent electrothermal film electric signal acquisition in the time dimension.

[0047] Further, the specific acquisition process of the electrothermal film signal acquisition monitoring result is as follows: the electric signal time sequence offset index reflecting the qualified degree of the electric signal time sequence offset is obtained by proportioning the preset electric signal time sequence offset and the electric signal time sequence offset; the electric signal time sequence offset result reflecting the qualified degree of the electrothermal film electric signal phase is obtained by weighting processing the electric signal time sequence offset index combined with the time sequence offset rate reflecting the degree of the electric signal time sequence offset result on the electrothermal film signal acquisition monitoring result; the electrothermal film signal acquisition monitoring result is obtained by harmonic averaging the electric signal time sequence offset result and the electrothermal film load characteristic measurement index; the less the battery power, the faster the change of the electrothermal film load characteristic, the inductive component generated by the electromagnetic dump also changes, causing the electrothermal film electric signal acquisition to be more, resulting in the delay of the electrothermal film sampling, thereby causing the electric signal time sequence offset result to be larger, the electric signal time sequence offset is represented by the average value of the difference between the preset electrothermal film signal acquisition monitoring time period and the preset sampling point time of each sampling trigger point time monitored by the clock module; the sampling point time is set in advance by the preset personnel; the electrothermal film load characteristic measurement index is represented by the result of weighting processing the load characteristic regulation rate reflecting the degree of the electrothermal film load characteristic measurement index on the electrothermal film signal acquisition monitoring result combined with the qualified electrothermal film load characteristic measurement result, reflecting the change of the electrothermal film load characteristic; the qualified electrothermal film load characteristic measurement result is represented by the electrothermal film load characteristic measurement result corresponding to the qualified electrothermal film load characteristic measurement condition.

[0048] It should be noted that the electric signal time sequence offset result and the electrothermal film load characteristic measurement index are respectively input into the mapping set, wherein the mapping set is represented by the result obtained by constructing the electric signal time sequence offset result and the electrothermal film load characteristic measurement index one-to-one mapped with the corresponding time sequence offset rate and load characteristic regulation rate by the preset mapping relationship by the preset personnel; in the embodiment, the value range of the time sequence offset rate and the load characteristic regulation rate is 0 to 1.

[0049] In the embodiment, the acquisition of the electrothermal film signal collection monitoring result can accurately reflect the multiple factors affecting the qualified degree of the electrothermal film electric signal collection monitoring, which helps to improve the reliability of the electrothermal film electric signal collection, reduce the interference of the electrothermal film electric signal collection caused by timing distortion or state mismatch, effectively reduce the influence of sampling timing jitter and synchronization error on the integrity of the electrothermal film electric signal, and ensure the accuracy and consistency of the electrothermal film electric signal collection.

[0050] Further, the specific process of electrothermal film signal collection optimization is as follows: electrothermal film signal denoising processing is performed, and the noise in the electrothermal film electric signal in the electrothermal film electric signal collection process is removed based on wavelet filtering operation; the electrothermal film signal denoising processing is used to reduce the interference of the electrothermal film electric signal collection to improve the accuracy of the electric signal collection; the electric signal collection processing is performed, and the reference frequency adjustment is performed according to the difference between the reference frequency in the phase-locked loop and the electrothermal film electric signal collection frequency; the reference frequency adjustment means that the amplitude corresponding to the preset reference frequency ratio is taken as the adjustment step to gradually increase the electrothermal film reference frequency; gradually increasing the electrothermal film reference frequency helps to improve the synchronization of the electrothermal film electric signal collection, thereby increasing the qualification of the electrothermal film electric signal collection; the electrothermal film reference frequency is monitored by an oscilloscope, and the preset reference frequency ratio is obtained by inputting the electrothermal film signal collection monitoring result and the electric signal sampling pulse into the reference frequency mapping set; the reference frequency mapping set means that the mapping set corresponding to the relationship between the electrothermal film signal collection monitoring result and the electric signal sampling pulse and the preset reference frequency ratio is obtained by continuously verifying the preset personnel based on the linear regression algorithm; by driving the reference frequency in the phase-locked loop, the electrothermal film electric signal collection frequency is dynamically adapted, and finally the real-time synchronization and stable control of the electrothermal film electric signal collection are realized; the electric signal collection processing is used to reduce the trigger point time error and reduce the electric signal timing offset; if the re-acquired electrothermal film signal collection monitoring result after the electrothermal film signal collection optimization meets the electrothermal film signal collection monitoring qualified condition, the heating body heating performance evaluation is performed, otherwise, the electrothermal film signal collection optimization abnormal prompt is sent to the preset personnel.

[0051] In the embodiment, the electrothermal film signal collection optimization helps to improve the accuracy of the electrothermal film electric signal sampling timing, ensure the authenticity and timeliness of the electrothermal film electric signal, reduce the inaccuracy of the electric signal caused by the original electrothermal film electric signal characteristic interference, remove the non-stationary noise component in the electric signal, thereby improving the clarity of the electric signal and increasing the accuracy of the electrothermal film electric signal phase, thereby improving the qualification of the electrothermal film electric signal collection.

[0052] Further, the specific process of performing the heating performance evaluation of the heating body is as follows: inputting the heating body input power into the constructed power-temperature response model to obtain the ideal temperature of the heating body; the specific construction process of the power-temperature response model is as follows: extracting the key feature dimensions of the heating body input power and the heating body temperature based on a regression algorithm, capturing the time sequence dependence relationship between the heating body input power and the heating body temperature caused by thermal inertia based on a long short-term memory network, jointly constructing a power-temperature curve, embedding the second law of thermodynamics as a regularization term in the loss function, and then adopting a transfer learning strategy to accelerate the convergence process of the power-temperature curve; performing difference analysis on the actual temperature of the heating body and the ideal temperature of the heating body, that is, difference operation, to obtain the heating body temperature evaluation result for reflecting the temperature performance of the heating body, and monitoring the actual temperature of the heating body through a thermometer; if the heating body temperature evaluation result is within the preset heating body temperature evaluation result range, a heating performance qualified prompt of the heating body is sent to a preset person; if the heating body temperature evaluation result is less than the minimum value of the preset heating body temperature evaluation result range, the preset heating body temperature evaluation result range contains both ends of the maximum value and the minimum value, and the minimum value of the preset heating body temperature evaluation result range is represented by the minimum value of the heating body temperature evaluation result in the historical time period, heating operation of the heating body is performed; the heating operation of the heating body means that the chip built-in in the heating body, such as DS18B20, STTS22H, etc., is used to control the heating of the heating body; the chip is connected with the NTC probe on the electrothermal film, the NTC probe and the temperature control circuit board jointly perform constant temperature control, for example, the resistance value of the electrothermal film changes nonlinearly with temperature (follows the exponential law), the resistance value of the electrothermal film is converted into an analog voltage signal through a voltage dividing circuit and then sent to the operational amplifier of the temperature control circuit board for conditioning and amplification, and then converted into a digital quantity by an analog-to-digital converter for microcontroller processing, the MCU (Microcontroller Unit) internally runs a PID (Proportional-Integral-Derivative) algorithm, compares the continuously collected actual temperature value of the heating body with the preset target temperature, calculates the proportional, integral, and differential control parameters, adjusts the duty cycle of the output pulse width modulation signal, drives the chip built-in in the heating body to work, and when it is detected that the temperature is lower than the minimum value, the PWM duty cycle is increased to increase the heating power; when it is detected that the temperature is higher than the maximum value, the duty cycle is reduced to reduce the power input, and an overshoot protection threshold is set to prevent temperature from fluctuating sharply; if the heating body temperature evaluation result is greater than the maximum value of the preset heating body temperature evaluation result range, the maximum value of the preset heating body temperature evaluation result range is represented by the maximum value of the heating body temperature evaluation result in the historical time period, cooling operation of the heating body is performed; the cooling operation of the heating body means that the chip built-in in the heating body is used to control the cooling of the heating body; inputting the heating body input power into the constructed power-power consumption response model to obtain the ideal power consumption of the heating body;The specific construction process of the power-power consumption response model is as follows: by extracting the key feature dimensions of the heating body input power and the heating body power consumption based on a regression algorithm, capturing the time sequence dependence of the heating body input power and the heating body power consumption caused by thermal inertia based on a long short-term memory network, jointly constructing a power-power consumption curve, embedding the second law of thermodynamics in the loss function as a regularization term, and adopting a transfer learning strategy to accelerate the convergence process of the power-power consumption curve; by performing difference analysis on the actual power consumption of the heating body and the ideal power consumption of the heating body, the heating body power consumption evaluation result reflecting the performance of the heating body is obtained; the actual power consumption of the heating body represents the total amount of actual consumed electric energy, and the actual power consumption of the heating body is monitored by a smart meter; if the heating body power consumption evaluation result is within the preset heating body power consumption evaluation result range, which is set in advance by the preset personnel, the heating body energy consumption qualified prompt is given to the preset personnel, otherwise, the heating body energy consumption abnormal prompt is given to the preset personnel; the input power of the heating body is input into the constructed power-heat response model to obtain the ideal heat of the heating body; the specific construction process of the power-heat response model is as follows: by extracting the key feature dimensions of the heating body input power and the heating body heat based on a regression algorithm, capturing the time sequence dependence of the heating body input power and the heating body heat caused by thermal inertia based on a long short-term memory network, jointly constructing a power-heat curve, embedding the second law of thermodynamics in the loss function as a regularization term, and adopting a transfer learning strategy to accelerate the convergence process of the power-heat curve; by performing difference analysis on the actual heat of the heating body and the ideal heat of the heating body, the heating body heat evaluation result reflecting the performance of the heating body is obtained; if the heating body heat evaluation result is within the preset heating body heat evaluation result range, which is set in advance by the preset personnel, the heating body heating qualified prompt is given to the preset personnel, otherwise, the heating body heating abnormal prompt is given to the preset personnel, the actual heat of the heating body is monitored by a heat meter, for example, at a standard ambient temperature, such as 25℃, the time required for the electrothermal film to reach a set temperature, such as 50℃, from power-on is recorded, the heating rate of a high-quality electrothermal film should not be less than 2℃ / min, and the temperature rising process is smooth without fluctuation, which can reflect the energy conversion efficiency and heating uniformity, thereby realizing the electrothermal film liquid heating performance evaluation.

[0053] In the embodiment, by performing the heating performance evaluation of the heating body, the actual working performance of the heating body can be effectively evaluated, the accuracy of the performance judgment of the heating body is improved, an accurate direction is provided for subsequent precise temperature control and optimization, the heating body is ensured to be in an optimal working state to realize autonomous performance optimization, thereby comprehensively improving the reliability and thermal management precision of the heating body, and a solid theoretical basis and data support are provided for subsequent heating performance evaluation of the heating body.

[0054] For example, Figure 4The diagram shown is a structural schematic of a heating performance evaluation device for an electrothermal film liquid heating element provided in an embodiment of this application. Figure 5 The diagram shown is a schematic representation of the heating element assembly structure of a heating element performance evaluation device for electrothermal film liquid provided in an embodiment of this application. Figure 6 The diagram shown is a schematic representation of the structure of an electrothermal film in an embodiment of this application for evaluating the heating performance of an electrothermal film liquid heating element. Based on this heating device, an application such as the method for evaluating the heating performance of an electrothermal film liquid heating element is used. The device includes: a cover 1, a plug assembly 2, a heating element assembly 3, a base 4, a circuit board 5, and a button 6. The cover 1 covers the heating element assembly 3, the base 4, and the circuit board 5, and is used to conduct the heat energy of the heating element assembly 3. The plug assembly 2 is used to connect a power source to provide electrical energy to the heating element assembly 3. The heating element assembly 3 includes: a plastic bracket 3-1, an electrothermal film 3-2, an NTC probe 3-3, and a power cord 3-4. 1. Point contact with the heating film 3-2 for fixing the heating film 3-2; the heating film 3-2 is inserted into the plastic bracket 3-1 in a ring shape for converting received electrical energy into heat energy; the NTC probe 3-3 is installed on the surface of the ring-shaped heating film 3-2 for real-time acquisition of the temperature of the heating film 3-2; the power cord 3-4 connects the heating film 3-2 and the plug socket assembly for transmitting electrical energy; the base 4 is used to fix the plug socket assembly 2, the heating element assembly 3, the circuit board 5, and the button 6 above; the circuit board 5 is used to receive the electrical signal of the heating film obtained by the NTC probe 3-3 for analysis and to control the heating and cooling of the heating film 3-2; the button 6 is used to control the opening and closing of the liquid heating element of the heating film.

[0055] Specifically, first, pressing the button allows the plug assembly to transmit current to both ends of the heating film via the power cord. Then, the heating film converts electrical energy into heat energy and transmits the real-time temperature readings to the NTC probe mounted on the surface of the circular heating film. The NTC probe's temperature-sensing element responds quickly to changes in the heating film's temperature. When the heating film's temperature rises, the NTC probe's resistance decreases; conversely, when the temperature falls, the resistance increases. This resistance change is converted into a standard analog electrical signal by the signal processing module inside the NTC probe and transmitted to the circuit board. The microprocessor inside the circuit board compares this signal with preset temperature thresholds, such as the set heating temperature and overheat protection temperature. If the actual temperature is lower than the set heating temperature, the microprocessor sends a command to the relay to close it, maintaining the heating film's energization and continuing heating. If the actual temperature reaches or exceeds the set heating temperature, the microprocessor controls the relay to open, cutting off the power to the heating film and stopping heating, thus achieving constant temperature control. Simultaneously, if the heating film malfunctions, such as a partial short circuit causing a sudden temperature rise exceeding the overheat protection temperature, the controller immediately cuts off the main power supply.

[0056] like Figure 7The figure shown is a graph of the input power and temperature of a heating element in an embodiment of this application for evaluating the heating performance of a heating element in an electrothermal film liquid. The graph reflects the relationship between the temperature of the heating element and the input power of the heating element. Initially, as the input power of the heating element increases, the temperature of the heating element continues to rise. When the input power reaches about 500W, the temperature reaches its peak. Afterward, as the input power continues to increase, the temperature begins to decrease, showing a trend of first rising and then falling.

[0057] like Figure 8 The figure shows the heating element input power-heating element power consumption curve of a heating element for evaluating the heating performance of an electrothermal film liquid provided in an embodiment of this application. The figure shows the relationship between the heating element power consumption and the heating element input power. As the heating element input power increases, the heating element power consumption generally shows an upward trend, but the rate of increase gradually slows down and eventually stabilizes. This indicates that when the input power reaches a certain level, the power consumption no longer increases significantly.

[0058] like Figure 9 The figure shown is a graph of the input power and heat output of a heating element in an embodiment of this application, which illustrates the relationship between the heat output and the input power of the heating element. As the input power increases, the heat output rises continuously. In the later stages of the power increase, the rate of increase in heat output slows down, showing an overall trend of continuous growth that eventually levels off.

[0059] In summary, this application embodiment obtains the evaluation results of the electrothermal film voltage switching by performing an evaluation, and determines whether to optimize the electrothermal film voltage switching based on the obtained evaluation results. This helps to accurately evaluate the electrothermal film voltage switching situation, improve the stability of the electrothermal film voltage switching, reduce inaccurate electrothermal film electrical signal acquisition caused by switching noise, and ensure the accuracy of the electrothermal film voltage switching frequency to improve the stability of the heating element's operation. Furthermore, by performing an electrothermal film load characteristic measurement to obtain the measurement results, and determining whether to perform load characteristic stabilization operations based on the obtained measurement results, this helps to accurately evaluate the electrothermal film load characteristics and improve... The qualification of the electric heating film is ensured to avoid incomplete electric signal acquisition due to rapid changes in the load characteristics of the electric heating film, thus ensuring the reliability of the electric signal and improving the accuracy of the heating element's operation. This is achieved by performing electric heating film signal acquisition and monitoring to obtain the monitoring results. Based on the acquired results, it is determined whether the electric heating film signal acquisition and monitoring meets the qualification conditions. This helps to accurately assess the qualification level of the electric heating film signal acquisition and monitoring, improve the accuracy of electric heating film signal acquisition, reduce incomplete electric signal acquisition caused by rapid changes in the frequency of electric signal changes, ensure the qualification of electric heating film signal acquisition, and thereby improve the accuracy of the heating performance evaluation of the electric heating film liquid heating element.

[0060] The above merely provides the specific implementation of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can easily think of the change or replacement within the technical range disclosed by the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A method for evaluating the heating performance of a heating element for electrothermal film liquid, characterized in that, Includes the following steps: During the evaluation of the heating performance of the heating element, an electrothermal film voltage switching evaluation is performed to obtain an evaluation result reflecting the qualification of the electrothermal film voltage switching. Based on the obtained evaluation result, it is determined whether to optimize the electrothermal film voltage switching. The optimization of the electrothermal film voltage switching includes: a switching voltage phase alignment operation to improve the qualification of the electrothermal film switching voltage phase alignment and an electrothermal film noise adjustment to reduce the noise interference of the electrothermal film switching voltage. The electrothermal film refers to the functional element in the heating element that generates heat. After an abnormality occurs during the voltage switching optimization of the electric heating film, an electric heating film load characteristic measurement is performed to obtain the electric heating film load characteristic measurement result, which reflects the qualification level of the electric heating film load characteristic. Based on the obtained electric heating film load characteristic measurement result, it is determined whether to perform load characteristic stabilization operation. The load characteristic stabilization operation is used to ensure the stability of the electric heating film load and improve the monitoring accuracy of the electric heating film load. After the load characteristics of the electric heating film are qualified, the electric heating film signal acquisition and monitoring is performed to obtain the electric heating film signal acquisition and monitoring results to reflect the qualification level of the electric heating film signal acquisition and monitoring and to determine whether it meets the qualification conditions of the electric heating film signal acquisition and monitoring. If it meets the conditions, the heating performance evaluation of the heating element is performed to evaluate the heating performance of the heating element. Otherwise, the electric heating film signal acquisition optimization is performed to improve the stability of the electric heating film signal acquisition.

2. The method for evaluating the heating performance of a heating element for electrothermal film liquid according to claim 1, characterized in that, The specific process for determining whether to optimize the electrothermal film voltage switching based on the obtained evaluation results is as follows: The evaluation results of the electric heating film voltage switching are obtained by quantifying the ratio of the electric heating film voltage stability and the preset electric heating film voltage stability. Determine whether the electric heating film voltage switching qualification conditions are met based on the obtained evaluation results of the electric heating film voltage switching. The stability of the electric heating film voltage is represented by the ratio of the switching frequency of the preset electric heating film voltage during the preset electric heating film voltage switching evaluation period to the switching frequency of the electric heating film voltage, which is used to reflect the passability of the electric heating film voltage switching frequency. The qualified condition for the electric heating film voltage switching means that the electric heating film voltage switching evaluation result is greater than the preset electric heating film voltage switching evaluation result; If the evaluation results of the electric heating film voltage switching meet the qualified conditions for electric heating film voltage switching, then the electric heating film signal acquisition and monitoring will be performed; otherwise, the electric heating film voltage switching optimization will be performed.

3. The method for evaluating the heating performance of a heating element for electrothermal film liquid according to claim 2, characterized in that, The specific process for optimizing the voltage switching of the electrothermal film is as follows: The phase of the electrical signal corresponding to the converted electrothermal film voltage is controlled within a preset phase range, and the electrothermal film noise is adjusted by an averaging filter. The noise adjustment of the electrothermal film means that the average length of the window movement is increased step by step with the amplitude corresponding to the preset average length of the window movement as the adjustment step. The preset window moving average length ratio is obtained by inputting the electrothermal film voltage switching evaluation result and the average voltage value into the moving length average mapping set; The average voltage value is represented by the average value of the voltage across the two ends of the electric heating film during a preset electric heating film voltage switching evaluation period. If the re-acquired electrothermal film voltage switching evaluation result after optimization meets the qualified conditions for electrothermal film voltage switching, then electrothermal film signal acquisition and monitoring will be performed; otherwise, electrothermal film load characteristic measurement will be performed.

4. The method for evaluating the heating performance of a heating element for an electrothermal film liquid according to claim 3, characterized in that, The specific process for measuring the load characteristics of the electrothermal film is as follows: The load characteristics of the electrothermal film are measured by harmonic averaging the results of the resistance change of the electrothermal film and the frequency change of the electrical signal. Determine whether the electric heating film load characteristic measurement results meet the qualification conditions for electric heating film load characteristic measurement based on the obtained results. If the results of the load characteristic measurement of the electric heating film meet the qualified conditions for the load characteristic measurement of the electric heating film, then the electric heating film signal acquisition and monitoring will be performed; otherwise, the load characteristic stabilization operation will be performed. The qualified condition for measuring the load characteristics of the electrothermal film indicates that the result of the electrothermal film load characteristics measurement is greater than the preset result of the electrothermal film load characteristics measurement. The result of the change in resistance of the heating film is quantified by the ratio of the preset change rate of resistance of the heating film to the change rate of resistance of the heating film, and then weighted by the resistance control rate, which is used to reflect the degree of influence of the change in resistance of the heating film on the measurement result of the load characteristics of the heating film. This result is used to reflect the pass rate of the change in resistance of the heating film. The electrical signal frequency change result is quantified by the ratio of the preset electrical signal frequency change of the electrothermal film to the electrical signal frequency change of the electrothermal film. It is then combined with the signal change regulation rate, which reflects the degree of influence of the electrical signal frequency change result on the measurement result of the electrothermal film load characteristics, to reflect the pass rate of the electrical signal frequency change of the electrothermal film.

5. The method for evaluating the heating performance of a heating element for electrothermal film liquid according to claim 4, characterized in that, The specific process for performing load characteristic stabilization is as follows: The electrical signal acquisition frequency resolution is adjusted by gradually increasing the electrical signal acquisition frequency resolution step by step, with the amplitude corresponding to the preset acquisition frequency resolution ratio as the adjustment step size. The preset acquisition frequency resolution ratio is obtained by inputting the electrothermal film load characteristic measurement result and the original electrical signal acquisition frequency resolution into the electrical signal acquisition mapping set. The aforementioned adjustment of the electrical signal acquisition frequency resolution is used to increase the electrical signal acquisition frequency in order to improve the monitoring accuracy of the electrothermal film load characteristics. If the load characteristic measurement result of the electrothermal film obtained again after the load characteristic stabilization operation meets the qualified conditions for the load characteristic measurement of the electrothermal film, then the electrothermal film signal acquisition and monitoring will be performed; otherwise, an abnormal load characteristic stabilization operation prompt will be sent to the preset personnel.

6. The method for evaluating the heating performance of a heating element for electrothermal film liquid according to claim 5, characterized in that, The specific process for performing electrothermal film signal acquisition and monitoring is as follows: Determine whether the acquisition and monitoring results of the electrothermal film signal meet the qualification conditions for electrothermal film signal acquisition and monitoring. The qualified condition for electrothermal film signal acquisition and monitoring indicates that the electrothermal film signal acquisition and monitoring result is greater than the preset electrothermal film signal acquisition and monitoring result; If the signal acquisition and monitoring results of the electric heating film meet the qualified conditions for electric heating film signal acquisition and monitoring, the heating performance of the heating element will be evaluated; otherwise, the signal acquisition of the electric heating film will be optimized.

7. The method for evaluating the heating performance of a heating element for an electrothermal film liquid according to claim 6, characterized in that, The specific process for acquiring the signal acquisition and monitoring results of the electrothermal film is as follows: The electrical signal timing offset index is obtained by quantifying the ratio of the preset electrical signal timing offset to the electrical signal timing offset, which reflects the degree of acceptance of the electrical signal timing offset. The electrical signal timing offset result, which reflects the phase qualification of the electrothermal film, is obtained by weighting the electrical signal timing offset index in combination with the timing offset rate. The timing offset rate is used to reflect the degree to which the timing offset result of the electrical signal affects the acquisition and monitoring result of the electrothermal film signal; The electrothermal film signal acquisition and monitoring results are obtained by harmonic averaging the electrical signal timing offset results and the electrothermal film load characteristic measurement index. The electrical signal timing offset is represented by the average of the differences between the time of each sampling trigger point and the time of the preset sampling point during the preset electrothermal film signal acquisition and monitoring period. The electrothermal film load characteristic measurement index is represented by a weighted result of the qualified electrothermal film load characteristic measurement result combined with the load characteristic regulation rate, which reflects the degree of influence of the electrothermal film load characteristic measurement index on the electrothermal film signal acquisition and monitoring result, and is used to reflect the change of electrothermal film load characteristics. The qualified electrothermal film load characteristic measurement result is represented by the electrothermal film load characteristic measurement result corresponding to the qualified conditions for electrothermal film load characteristic measurement.

8. The method for evaluating the heating performance of a heating element for an electrothermal film liquid according to claim 6, characterized in that, The specific process for optimizing the electrothermal film signal acquisition is as follows: Noise denoising processing is performed on the electrothermal film signal to remove noise from the electrothermal film signal during the acquisition process. The aforementioned electrothermal film signal denoising processing is used to reduce interference in the acquisition of the electrothermal film's electrical signals, thereby improving the accuracy of the electrical signal acquisition. Electrical signal acquisition and processing are performed, and the reference frequency is adjusted based on the difference between the reference frequency and the electrical signal acquisition frequency of the electrothermal film. The aforementioned adjustment of the reference frequency means gradually increasing the reference frequency of the heating film by using the amplitude corresponding to the preset reference frequency ratio as the adjustment step size. The preset reference frequency ratio is obtained by inputting the electrothermal film signal acquisition and monitoring results and the electrical signal sampling pulse into the reference frequency mapping set; The electrical signal acquisition and processing is used to reduce the trigger point time error and decrease the electrical signal timing offset. If the re-acquired electrothermal film signal acquisition and monitoring results after optimization meet the qualified conditions for electrothermal film signal acquisition and monitoring, the heating performance of the heating element will be evaluated; otherwise, an abnormality prompt for electrothermal film signal acquisition and optimization will be sent to the designated personnel.

9. The method for evaluating the heating performance of a heating element for an electrothermal film liquid according to claim 8, characterized in that, The specific process for performing the heating performance evaluation of the heating element is as follows: The input power of the heating element is fed into the constructed power-temperature response model to obtain the ideal temperature of the heating element; By analyzing the difference between the actual temperature and the ideal temperature of the heating element, a temperature evaluation result reflecting the temperature performance of the heating element is obtained. If the temperature assessment result of the heating element is within the preset range of the heating element temperature assessment result, a notification that the heating element's heating performance is qualified will be sent to the preset personnel. If the temperature assessment result of the heating element is less than the minimum value of the preset temperature assessment result range of the heating element, then the heating element heating operation will be performed. The heating operation of the heating element refers to controlling the heating element's heating through a chip built into the heating element; The chip is connected to an NTC probe on the electrothermal film, and the NTC probe and the temperature control circuit board work together to perform constant temperature control. If the temperature assessment result of the heating element is greater than the maximum value of the preset temperature assessment result range of the heating element, the heating element cooling operation will be performed. The cooling operation of the heating element refers to controlling the cooling of the heating element through the chip built into the heating element. The input power of the heating element is fed into the constructed power-power response model to obtain the ideal power consumption of the heating element; By performing difference analysis between the actual power consumption and the ideal power consumption of the heating element, a power consumption evaluation result reflecting the power consumption performance of the heating element is obtained. If the power consumption assessment result of the heating element is within the preset range of the power consumption assessment result of the heating element, the power consumption of the heating element is qualified and a preset personnel will be notified; otherwise, the power consumption of the heating element is abnormal and a preset personnel will be notified. The input power of the heating element is fed into the constructed power-thermal response model to obtain the ideal heat of the heating element; By analyzing the difference between the actual heat output and the ideal heat output of the heating element, a heat output evaluation result reflecting the heat output performance of the heating element is obtained. If the heat assessment result of the heating element is within the preset range, the heating element is deemed to be of acceptable quality and the preset personnel will be notified; otherwise, the heating element is deemed to be of abnormal quality and the preset personnel will be notified.

10. A heating device for electrothermal film liquid, employing the heating performance evaluation method for a heating element for electrothermal film liquid as described in any one of claims 1-9, characterized in that, include: Face cover (1), plug socket assembly (2), heating element assembly (3), base (4), circuit board (5) and button (6); The cover (1) covers the heating element assembly (3), the base (4), and the circuit board (5) to conduct the heat energy of the heating element assembly (3); The plug and socket assembly (2) is used to connect the power supply to provide electrical energy to the heating element assembly (3); The heating element assembly (3) includes: a plastic bracket (3-1), an electrothermal film (3-2), an NTC probe (3-3), and a power cord (3-4). The plastic bracket (3-1) makes point contact with the heating film (3-2) to fix the heating film (3-2). The electrothermal film (3-2) is inserted into the plastic support (3-1) in a ring shape to convert the received electrical energy into heat energy; The NTC probe (3-3) is mounted on the surface of the circular electrothermal film (3-2) for real-time acquisition of the temperature of the electrothermal film (3-2); The power cord (3-4) connects the heating film (3-2) and the plug assembly for transmitting electrical energy; The base (4) is used to fix the plug socket assembly (2), heating element assembly (3), circuit board (5) and button (6) above. The circuit board (5) is used to receive the electric signal of the electrothermal film obtained by the NTC probe (3-3), analyze it, and control the heating and cooling of the electrothermal film (3-2); The button (6) is used to control the opening and closing of the heating element for the electrothermal film liquid.

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