CN117426569A - Electronic atomizing device, heating control method thereof, control device and storage medium - Google Patents

Electronic atomizing device, heating control method thereof, control device and storage medium Download PDF

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Publication number
CN117426569A
CN117426569A CN202210829544.3A CN202210829544A CN117426569A CN 117426569 A CN117426569 A CN 117426569A CN 202210829544 A CN202210829544 A CN 202210829544A CN 117426569 A CN117426569 A CN 117426569A
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China
Prior art keywords
resistance
heating
heating element
resistance change
temperature
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CN202210829544.3A
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Chinese (zh)
Inventor
胡平
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Shenzhen Smoore Technology Ltd
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Shenzhen Smoore Technology Ltd
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Priority to CN202210829544.3A priority Critical patent/CN117426569A/en
Publication of CN117426569A publication Critical patent/CN117426569A/en
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    • AHUMAN NECESSITIES
    • A24TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24FSMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES
    • A24F40/00Electrically operated smoking devices; Component parts thereof; Manufacture thereof; Maintenance or testing thereof; Charging means specially adapted therefor
    • A24F40/40Constructional details, e.g. connection of cartridges and battery parts
    • A24F40/46Shape or structure of electric heating means
    • AHUMAN NECESSITIES
    • A24TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24FSMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES
    • A24F40/00Electrically operated smoking devices; Component parts thereof; Manufacture thereof; Maintenance or testing thereof; Charging means specially adapted therefor
    • A24F40/40Constructional details, e.g. connection of cartridges and battery parts
    • AHUMAN NECESSITIES
    • A24TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24FSMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES
    • A24F40/00Electrically operated smoking devices; Component parts thereof; Manufacture thereof; Maintenance or testing thereof; Charging means specially adapted therefor
    • A24F40/50Control or monitoring
    • AHUMAN NECESSITIES
    • A24TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24FSMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES
    • A24F40/00Electrically operated smoking devices; Component parts thereof; Manufacture thereof; Maintenance or testing thereof; Charging means specially adapted therefor
    • A24F40/50Control or monitoring
    • A24F40/57Temperature control

Abstract

The present application relates to an electronic atomizing device, a heating control method thereof, a control device, and a computer-readable storage medium, the method comprising: after detecting that the electronic atomization device contains an atomization medium, heating the atomization medium to obtain resistance change data of a heating element in the atomization medium; determining the resistance temperature coefficient of the heating element according to the resistance change data; determining a temperature protection threshold according to the resistance temperature coefficient of the heating element; and controlling the electronic atomization device to perform atomization according to the temperature protection threshold value. After detecting that the electronic atomization device contains an atomization medium, heating the atomization medium to obtain resistance change data of the heating element, determining the resistance temperature coefficient of the heating element according to the resistance change data of the heating element, and further obtaining a temperature protection threshold value to perform heating temperature control, so that the influence of temperature control effect caused by calculation errors of the temperature protection threshold value due to inaccurate resistance temperature coefficient of the heating element is avoided, and the temperature protection reliability of the electronic atomization device is improved.

Description

Electronic atomizing device, heating control method thereof, control device and storage medium
Technical Field
The present disclosure relates to the technical field of atomizing devices, and in particular, to an electronic atomizing device, a heating control method thereof, a control device thereof, and a computer readable storage medium.
Background
The electronic atomization device is a relatively mature product in the market, and atomizes an atomization medium through an atomizer to generate smoke, so that a user can obtain effective substances in tobacco tar by sucking the smoke. The atomizing principle of the atomizing medium is that a metal heating body generates a large amount of heat through conduction so as to atomize, and the heating body has the characteristic that the resistance value changes along with the temperature, namely the TCR (Temperature Coefficient Of Resistance ) characteristic, and the resistance value of the heating body can be expressed as the current temperature state under certain conditions based on the TCR principle.
According to the traditional heating control method of the electronic atomization device, according to the pre-stored TCR, the resistance value of the heating body corresponding to the protection temperature is deduced based on the TCR principle, and the resistance value is used as a temperature protection threshold value in the heating process, so that the defect of low temperature protection reliability exists.
Disclosure of Invention
In view of the foregoing, it is desirable to provide an electronic atomizing device, a heating control method thereof, a control device, and a computer-readable storage medium that can improve the reliability of temperature protection.
A heating control method of an electronic atomizing device, comprising:
after detecting that an electronic atomization device contains an atomization medium, heating the atomization medium to obtain resistance change data of a heating element in the atomization medium;
determining the temperature coefficient of resistance of the heating element according to the resistance change data;
determining a temperature protection threshold according to the resistance temperature coefficient of the heating element;
and controlling the electronic atomization device to perform atomization according to the temperature protection threshold.
In one embodiment, the determining the temperature coefficient of resistance of the heating element according to the resistance change data includes:
obtaining the resistance change rate of the heating element according to the resistance change data;
and determining the temperature coefficient of resistance of the heating element according to the change rate of the resistance of the heating element.
In one embodiment, the obtaining the resistance change rate of the heating element according to the resistance change data includes:
and determining a resistance change curve according to the resistance change data, and performing linear fitting according to the resistance change curve to obtain the resistance change rate of the heating element.
In one embodiment, the obtaining the resistance change rate of the heating element according to the resistance change data includes:
Determining a stable resistance value according to the resistance change data, and taking the ratio of the resistance change value to the initial resistance value of the heating body as a resistance change rate; the resistance change value is the difference between the stable resistance value and the initial resistance value.
In one embodiment, the determining the temperature coefficient of resistance of the heating element according to the rate of change of resistance of the heating element includes:
and determining the temperature coefficient of resistance corresponding to the heating element according to the numerical interval of the resistance change rate of the heating element.
In one embodiment, the determining the temperature coefficient of resistance corresponding to the heating element according to the value interval of the change rate of resistance of the heating element includes:
determining the type of the heating element according to the resistance change rate of the heating element;
and determining the resistance temperature coefficient of the heating element according to the resistance change rate of the heating element and the numerical interval corresponding to the type of the heating element.
In one embodiment, the controlling the electronic atomization device to perform atomization according to the temperature protection threshold includes:
and after the suction negative pressure is detected, controlling the electronic atomization device to heat the atomization medium, and controlling the temperature when the resistance of the heating body is greater than or equal to the heating temperature threshold.
In one embodiment, the temperature control when the resistance value of the heating body is greater than or equal to the heating temperature threshold value includes:
and when the resistance value of the heating body is larger than or equal to the heating temperature threshold value, controlling the electronic atomization device to stop heating or reduce heating power.
A heating control device of an electronic atomizing device, comprising:
the data acquisition module is used for heating the atomization medium after detecting that the electronic atomization device contains the atomization medium, and acquiring resistance change data of a heating body in the atomization medium;
the data analysis module is used for determining the resistance temperature coefficient of the heating element according to the resistance change data;
the data processing module is used for determining a temperature protection threshold according to the resistance temperature coefficient of the heating element;
and the temperature control module is used for controlling the electronic atomization device to perform atomization according to the temperature protection threshold value.
The electronic atomization device comprises a sampling circuit and a controller, wherein the sampling circuit is connected with the controller, and the controller is used for heating control according to the method.
A computer readable storage medium having stored thereon a computer program which when executed by a processor performs the steps of:
After detecting that an electronic atomization device contains an atomization medium, heating the atomization medium to obtain resistance change data of a heating element in the atomization medium;
determining the temperature coefficient of resistance of the heating element according to the resistance change data;
determining a temperature protection threshold according to the resistance temperature coefficient of the heating element;
and controlling the electronic atomization device to perform atomization according to the temperature protection threshold.
According to the electronic atomization device, the heating control method, the control device and the computer readable storage medium, after the electronic atomization device is detected to contain the atomization medium, the atomization medium is heated, and resistance change data of a heating body in the atomization medium are obtained. And determining the resistance temperature coefficient of the heating element according to the resistance change data. And determining a temperature protection threshold according to the resistance temperature coefficient of the heating element, and controlling the electronic atomization device to perform atomization according to the temperature protection threshold. After detecting that the electronic atomization device contains an atomization medium, heating the atomization medium to obtain resistance change data of the heating element, analyzing and determining the resistance temperature coefficient of the heating element according to the resistance change data of the heating element, and further obtaining a temperature protection threshold value to perform heating temperature control, so that the influence of temperature control effect caused by calculation errors of the temperature protection threshold value due to inaccurate resistance temperature coefficient of the heating element is avoided, and the temperature protection reliability of the electronic atomization device is improved.
Drawings
FIG. 1 is a flow chart of a method of controlling heating of an electronic atomizing device according to an embodiment;
FIG. 2 is a schematic diagram of a sampling circuit according to an embodiment;
FIG. 3 is a flow chart of determining the temperature coefficient of resistance of a heating element based on resistance change data in one embodiment;
FIG. 4 is a flow chart of determining the temperature coefficient of resistance of a heating element based on resistance change data in another embodiment;
FIG. 5 is a flow chart of determining the temperature coefficient of resistance of a heating element from resistance change data in still another embodiment;
FIG. 6 is a flow chart showing the determination of the temperature coefficient of resistance of the heating element based on the resistance change data in still another embodiment;
FIG. 7 is a flow chart of a method of controlling heating of an electronic atomizing device according to another embodiment;
FIG. 8 is a schematic diagram of heating curves of different TCRs according to an embodiment;
FIG. 9 is a schematic diagram of a heating curve of a heating element during wet-burning control of an electronic atomizing device according to an embodiment;
FIG. 10 is a schematic flow chart of a heating control logic of the electronic atomizing device according to an embodiment;
fig. 11 is a block diagram showing a structure of a heating control device of the electronic atomizing device according to an embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be further described in detail with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the present application.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.
It is to be understood that in the following embodiments, "connected" is understood to mean "electrically connected", "communicatively connected", etc., if the connected circuits, modules, units, etc., have electrical or data transfer between them.
As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," and/or the like, specify the presence of stated features, integers, steps, operations, elements, components, or groups thereof, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or groups thereof.
The present embodiment provides an electronic atomizing device that can be used for atomizing a liquid medium. The electronic atomizing device comprises an atomizer and a battery assembly. Wherein, one end of the atomizer is detachably connected with the battery assembly; when the atomizer needs to be replaced, the atomizer can be detached from the battery assembly, and a new atomizer is connected with the battery assembly, so that the battery assembly can be recycled.
Nebulizers are used in different fields, such as medical nebulization, electronic nebulization, etc. The atomizer is used for storing the medium to be atomized and atomizing the medium to be atomized to generate aerosol, and in the embodiment, the atomizer is used for atomizing the medium to be atomized and generating aerosol for a user to suck; of course, in other embodiments, the atomizer may also be applied to a hair spray device to atomize hair spray for hair styling; or applied to medical equipment for treating upper and lower respiratory diseases to atomize medical drugs. The battery assembly is used to power the atomizer so that the atomizer can atomize the liquid medium to form an aerosol.
The atomizer includes first casing, mount pad and atomizing core. A liquid storage cavity, a mounting cavity and an air outlet channel are formed in the first shell. The liquid storage cavity is used for storing the liquid medium to be atomized, can be made of metal such as aluminum, stainless steel and the like, and can be made of plastic, and only the liquid medium to be atomized can be stored without reacting with the liquid medium to be atomized to cause the liquid medium to deteriorate; the shape and the size of the liquid storage cavity are not limited, and can be designed according to the needs.
The first housing forms a mounting cavity on a side of the reservoir adjacent to the battery assembly. The air outlet channel and the liquid storage cavity are arranged on the same side of the installation cavity side by side, and the air outlet channel is communicated with the outside atmosphere. The mount pad sets up in the one side that the installation cavity is close to battery pack, and atomizing core installs on the mount pad, and with the atomizing chamber of mount pad cooperation formation. The atomizing cavity is communicated with the air outlet channel, namely, the atomizing cavity, the air outlet channel and the external atmosphere are mutually communicated. Wherein, the mount pad is close to battery pack's one end and exposes, and mount pad and first casing detachable connection.
The atomizing core is used for atomizing the medium to be atomized in the liquid storage cavity into aerosol. The atomizing core includes a heating element and a porous member. The liquid in the liquid storage bin enters the porous piece, the porous piece guides the liquid medium to be atomized onto the heating element by utilizing capillary force, and the heating element heats and atomizes the liquid medium to form aerosol. The heating body can be a heating wire, a heating net, a heating film, a heating circuit and the like, and can be selected according to the needs. The porous member may be a porous ceramic or a cotton core.
The battery assembly comprises a second shell, a controller, a negative pressure sensing device, a sampling circuit and a battery, wherein a containing cavity is formed in the second shell, the battery is arranged in the containing cavity, and the battery is used for supplying power to the atomizing core.
The electronic atomizing device detects the suction negative pressure through the negative pressure sensing device to identify the suction action of the user, and heats the medium to be atomized when the suction action of the user is identified. Specifically, the correspondence between the resistance change rate and the temperature change of the heating element in the medium to be atomized can be expressed by the following formula:
(R1-R0)/R0=TCR*(T1-T0)
wherein R1 and T1 are resistance and temperature of the heating element in the current state, TCR is resistance temperature coefficient, and R0 and T0 are initial values related to the material composition of the heating element. Based on the TCR principle, the resistance can be expressed as the current temperature state under certain conditions, the resistance of the default atomizing medium before heating is the initial resistance, and the temperature before heating is normal temperature, generally calculated at 25 ℃. The resistance value corresponding to the protection temperature is calculated by monitoring the resistance value change of the heating body in real time to calculate and then control the threshold value, and the value can be used as a temperature protection threshold value in the heating process.
Before heating the atomizing medium according to the sucking action of a user, the electronic atomizing device firstly carries out short-time calibration heating on the atomizing medium, and monitors resistance change data of a heating body in the atomizing medium. And analyzing according to the resistance change data, determining the resistance temperature coefficient of the heating element, further calculating according to the resistance temperature coefficient of the heating element to obtain a temperature protection threshold, and controlling the heating temperature according to the temperature protection threshold.
In one embodiment, as shown in fig. 1, there is provided a heating control method of an electronic atomizing device, including:
step S100: after detecting that the electronic atomization device contains an atomization medium, heating the atomization medium to obtain resistance change data of a heating body in the atomization medium.
Specifically, after detecting that the electronic atomization device contains the atomized medium, before executing the heating operation on the atomized medium, the controller firstly controls the electronic atomization device to perform short-time calibration heating on the atomized medium, specifically, the electronic atomization device can perform constant-power heating on the atomized medium for 50-100ms, a sampling signal detected by a sampling circuit on a heating element of the atomized medium in the calibration heating process is obtained, and the real-time resistance value of the heating element is analyzed according to the sampling signal, so that resistance change data of the heating element in the calibration heating process is obtained. Wherein the heating element can be a metal heating film or a metal heating wire, the controller can specifically adopt MCU (Micro Controller Unit, Micro control unit), CPU (Central Processing Unit ), FPGA (Field Programmable Gate Array, field programmable gate array), etc. Taking the controller as an example, the controller can sample in real time through the ADC (Analog to Digital Converter, analog-digital converter) function of the MCU to obtain sampling data, and then calculate the real-time resistance of the heating element according to the sampling data. Specifically, as shown in FIG. 2, the structure of the sampling circuit is that R is the resistance of the heating element, R 2 Is a fixed voltage dividing resistor, U R The MCU is used for sampling the voltage U at two ends of the heating element R And calculating the real-time resistance of the heating element. The MCU can be used for analyzing the resistance temperature coefficient of the heating element by taking the real-time resistance value as the resistance change data of the heating element after calculating the real-time resistance value of the heating element according to the sampling data obtained by ADC sampling; the MCU can also directly take the sampled data obtained by ADC sampling as the resistance change data of the heating element, so as to be used for subsequent data analysis to determine the resistance temperature coefficient of the heating element.
Further, considering whether the electronic atomization device contains the atomization medium, the sampling signal sent by the sampling circuit is different, and whether the electronic atomization device contains the atomization medium can be detected by the controller according to the sampling signal of the sampling circuit. It will be appreciated that in other embodiments, other means of detecting whether the nebulized medium is contained on the electronic nebulizing device are possible.
Step S200: and determining the resistance temperature coefficient of the heating element according to the resistance change data.
After the resistance change data of the heating element in the heating process of short-time calibration is obtained, the controller analyzes the resistance change trend according to the resistance change data, and determines the actual resistance temperature coefficient of the heating element according to the analysis result to be used as a subsequent calculation temperature protection threshold value.
Step S300: and determining a temperature protection threshold according to the resistance temperature coefficient of the heating element.
The type of the temperature protection threshold is not unique, and may be a resistance threshold or a sampling threshold, and the sampling threshold may be a sampling voltage threshold specifically. Specifically, the heating of the electronic atomizing device may be classified into dry combustion and wet combustion according to whether or not there is an atomizing medium, for example, the electronic atomizing device performs wet combustion control when accommodating the atomizing medium, and the wet combustion temperature is the boiling point of the atomizing medium. When the atomization medium is not added in time after being used, dry combustion can occur, harmful gas can be generated during the dry combustion to influence the health of human bodies, and the electronic atomization device is easy to burn out, so that the dry combustion protection is needed. The temperature protection ranges under different heating modes also correspond to all differences, and taking dry heating as an example, the temperature protection ranges of the dry heating are as follows: 280-350 ℃, specifically, 300 ℃ can be adopted as a protection temperature, after the controller determines the resistance temperature coefficient TCR of the heating element, the resistance value of the heating element at normal temperature is taken as an initial temperature T0, the resistance value of the heating element at normal temperature is taken as an initial resistance value R0, and 300 ℃ is taken as a temperature T1, and the resistance coefficient TCR is substituted into a formula: (R1-R0)/r0=tcr (T1-T0), the calculated resistance value R1 is used as the temperature protection threshold. The controller may calculate a sampling threshold value corresponding to the resistance value R1 when the protection temperature is 300 ℃ as the temperature protection threshold value based on the resistance temperature coefficient of the heating element.
Step S400: and controlling the electronic atomization device to perform atomization according to the temperature protection threshold value. After the temperature protection threshold is determined, the controller performs atomization control according to the temperature protection threshold.
According to the heating control method of the electronic atomization device, after the electronic atomization device is detected to contain the atomization medium, the atomization medium is heated first to obtain the resistance change data of the heating element, the resistance temperature coefficient of the heating element is determined according to the resistance change data of the heating element, and then the temperature protection threshold is obtained for heating temperature control, so that the influence on the temperature control effect caused by inaccurate temperature protection threshold calculation error due to the resistance temperature coefficient of the heating element is avoided, and the temperature protection reliability of the electronic atomization device is improved.
In one embodiment, as shown in FIG. 3, step S200 includes step S220 and step S240.
Step S220: and obtaining the resistance change rate of the heating element according to the resistance change data. After acquiring the resistance change data detected in the process of calibrating and heating the atomized medium in a short time, the controller analyzes the resistance change data to obtain the resistance change rate of the heating element. The rate of change of resistance is a parameter associated with the temperature coefficient of resistance of the heating element, and may specifically be a parameter representing the trend of change of resistance. The controller can calculate the real-time resistance value of the heating element according to the sampling data to perform resistance change trend analysis to obtain the resistance change rate of the heating element; the controller may also directly analyze the trend of the resistance change according to the sampled data to obtain the rate of change of the resistance of the heating element. Since the sampled data is in direct proportion to the real-time resistance value, the rate of change of the resistance calculated from the real-time resistance value or from the sampled data is the same.
In one embodiment, as shown in fig. 4, step S220 includes step S222: and determining a resistance change curve according to the resistance change data, and performing linear fitting according to the resistance change curve to obtain the resistance change rate of the heating element.
Specifically, when the atomizing medium is heated at constant power, the temperature curve changes in a very short time (such as 50-100 ms) in the heating process, but the TCR difference of different heating elements can be distinguished by the difference because the TCR difference of the heating elements has great difference in the resistance change curves of the different heating elements. For example, in the process of carrying out calibration heating on an atomized medium for 100ms, the resistance change data of the heating element are acquired through equivalent time sampling, a resistance change curve is generated, and linear fitting is carried out according to the resistance change curve, so that a linear equation of a corresponding straight line is obtained. And finally, determining the slope of the straight line as the resistance change rate of the heating element according to the linear equation.
In another embodiment, as shown in fig. 5, step S220 includes step S224: and determining a stable resistance value according to the resistance change data, and taking the ratio of the resistance change value to the initial resistance value of the heating body as the resistance change rate.
The resistance change value is a difference value between the stable resistance value and the initial resistance value, and the initial resistance value is not determined in a unique manner, and specifically, the first resistance value of the acquired heating element is taken as the initial resistance value. Specifically, taking wet-burning heating atomizing medium as an example, after the atomizing medium is stably heated to reach the boiling point of the atomizing medium, namely stable wet burning, the wet burning temperature of the atomizing medium of the same type is fixed, but the stable resistance values of different heating bodies in the atomizing medium of the same type are not consistent. Therefore, in the process of heating the atomized medium to stable wet burning for a long time, the resistance change data of the heating element is collected, and the controller analyzes the resistance change data to find the resistance value when the resistance change tends to be stable as a stable resistance value. For example, when the sampled data acquired in the preset time or the difference between the sampled data of the preset continuous samples is smaller than the preset threshold, the stable wet burning is considered to be achieved, the resistance change of the heating element tends to be stable, the resistance value which is not changed any more at the moment can be taken as the stable resistance value. And finally, the controller obtains a resistance change value by differentiating the determined stable resistance value and the initial resistance value, and takes the ratio of the calculated resistance change value to the initial resistance value of the heating body as the resistance change rate.
Step S240: and determining the resistance temperature coefficient of the heating element according to the resistance change rate of the heating element. The controller may store the correspondence between the resistance change rate of the heating element and the temperature coefficient of resistance in advance, and may directly determine the actual temperature coefficient of resistance of the heating element according to the stored correspondence after determining the actual resistance change rate of the heating element.
In one embodiment, as shown in fig. 6, step S240 includes step S242: and determining the temperature coefficient of resistance corresponding to the heating element according to the numerical interval of the resistance change rate of the heating element.
Specifically, the fluctuation range of the resistance temperature coefficient of the heating element can be divided into different gear positions, the numerical value interval of the resistance change rate is determined for each gear position, the gear position corresponds to the set resistance temperature coefficient, and the corresponding relation between each gear position and the set resistance temperature coefficient is established and stored. After determining the resistance change rate of the heating element in the atomizing medium, the controller finds the numerical value interval where the resistance change rate is located, and then searches the temperature coefficient of resistance corresponding to the heating element by combining the relation table.
Further, in one embodiment, determining the temperature coefficient of resistance corresponding to the heating element according to the value interval in which the rate of change of resistance of the heating element is located includes: determining the type of the heating element according to the resistance change rate of the heating element; and determining the resistance temperature coefficient of the heating element according to the resistance change rate of the heating element and the numerical interval corresponding to the type of the heating element.
Specifically, the corresponding major classes can be firstly divided for the different types of heating elements, namely, a large-range fluctuation range of the resistance temperature coefficient is divided for the different types of heating elements, then the major classes of each type of heating elements are split, the major classes are divided into different gear positions, the numerical intervals of the resistance change rate are determined for each major class and the subdivided gear positions, and the resistance temperature coefficients corresponding to the gear positions are set. Taking the slope of a straight line determined by linear fitting according to a resistance change curve as an example, the upper and lower limit values of the numerical value interval are slope thresholds. After calculating the slope, the controller firstly carries out major classification according to the slope threshold value to determine the type of the heating element, then compares the calculated slope with a numerical interval under the type of the heating element to find the numerical interval where the slope is located, and finally searches for the temperature coefficient of resistance corresponding to the heating element by combining a relation table.
It will be appreciated that the specific manner of controlling the electronic atomizing device to control the heating temperature after the temperature protection threshold is calculated from the temperature coefficient of resistance of the heating element is not exclusive. In one embodiment, as shown in fig. 7, step S400 includes step S420: after the suction negative pressure is detected, the electronic atomization device is controlled to heat the atomization medium, and the temperature control is performed when the resistance value of the heating body is greater than or equal to the heating temperature threshold value.
After the controller determines the temperature protection threshold value for heating, the negative pressure sensing device detects the negative pressure to identify the sucking action of the user, and the atomized medium is heated after the negative pressure is detected, and the specific heating time can be preset. In the heating process, the controller also calculates the resistance value of the heating element in real time according to the sampling signal sent by the sampling circuit, and when the resistance value of the heating element is detected to be greater than or equal to the heating temperature threshold value, the controller performs temperature control so as to avoid dry burning or burning.
Further, in one embodiment, the temperature control is performed when the resistance value of the heating element is greater than or equal to the heating temperature threshold value, including: when the resistance value of the heating body is larger than or equal to the heating temperature threshold value, the electronic atomization device is controlled to stop heating or reduce heating power. In the heating process, if the resistance value of the heating body is detected to be greater than or equal to the heating temperature threshold value, the electronic atomization device is controlled to stop heating, or the heating power of the electronic atomization device is reduced.
In order to better understand the heating control method of the electronic atomizing device, a detailed explanation will be given below with reference to specific embodiments.
At present, the dry heating prevention or temperature control of an electronic atomization device is based on the TCR principle, the resistance of a default atomization medium before heating is an initial resistance, and the temperature before heating is normal temperature and is generally calculated at 25 degrees. The resistance change is monitored in real time to perform certain threshold calculation and then control, for example, 250 ℃ is used as a protection temperature, the resistance corresponding to 250 ℃ is calculated, and the resistance can be used as a temperature protection threshold in the heating process.
However, the TCR difference of the heating elements with different materials is huge, and the original electronic atomization device cannot accurately control the temperature aiming at the different heating elements. In addition, TCR of the heating elements with the same material and the same batch also has certain fluctuation, influences the accuracy of calculated temperature and has the risk of overhigh control temperature.
Based on the above, the application provides a heating control method of an electronic atomization device, which is characterized in that before an atomization medium is heated, calibration heating is performed for a short time, and the real-time resistance of a heating body in the atomization medium is monitored through a sampling circuit. As shown in FIG. 2, R is the resistance of the heating element, R 2 Is a fixed voltage dividing resistor, U R Is the voltage at two ends of the heating body.
When the atomizing medium is heated at constant power, the temperature curve changes in a very short time (such as 50-100 ms) in the heating process, but the difference of TCRs can be distinguished by the fact that the resistance change curves of the heating elements are greatly different due to the difference of TCRs. Taking the TCR of the heating element according to the sampling data of the heating element as an example, taking two heating elements with obvious TCR difference, comparing the ADC sampling data change of heating for 100ms under the same condition as shown in figure 8.
In fig. 8, the horizontal axis represents time (ms), the vertical axis on the left represents the ADC sampling value of the heater a, the vertical axis on the right represents the ADC sampling value of the heater B, and the ADC sampling value may represent the resistance value of the heater. X is the ADC sampling value change curve of the heating element A, the linear equation of a linear fitting obtained line is y=10.564x+714.6, Y is the ADC sampling value change curve of the heating element B, and the linear equation of a linear fitting obtained line is y=1.53954x+722.33. The TCR of the two heating bodies are 1000 and 350 respectively, the heating performance difference of the two heating bodies caused by material reasons is very large, and if the TCR of the two heating bodies are mutually used for dry combustion control, the two heating bodies are very inaccurate. According to the ADC sampling value change curves of the two heating elements, the slope of the linear equation calculated by fitting corresponds to 10.5 and 1.5, namely the resistance change rate of the corresponding heating element. By analyzing the resistance change rates of different heating elements, the same electronic atomization device can distinguish TCR differences of the heating elements, so that the electronic atomization device can better adapt to the different heating elements, and a better atomization effect of an atomization medium is achieved.
Specifically, for the same heating element, the difference is generated in the production process, the error of TCR characteristics of the heating element in the same batch is about + -7.5%, and the standard TCR value of 1000 is 925-1075 after the heating element A is produced. Based on this, as shown in fig. 10, the present application divides the different heating elements into a large class first, then divides the same heating element into different gear positions, and performs accurate TCR temperature control. After the atomized medium is inserted into the appliance, the change of the resistance value in the process of calibration heating is collected through 50-100ms of calibration heating, the type of the heating body is determined by using a slope threshold value in a large class classification mode, different gears are further distinguished by combining the type of the heating body, a temperature protection threshold value is obtained through calculation after a TCR value is determined by looking up a table, the controller heats the atomized medium when detecting suction negative pressure, and heating is stopped or heating power is reduced when detecting that the resistance value of the heating body is greater than or equal to the temperature protection threshold value.
Taking a heating body A as an example, before the scheme is applied, aiming at the heating bodies of 925-1075, the original practice is to uniformly calculate according to 1000 TCR, and after the scheme is applied, the TCR is divided into 3 gears of 925-975;975-1025;1025-1075, respectively calculated by using TCR of 950,1000,1050, the phase change reduces the accuracy of +/-7.5% to +/-2.5%, thereby effectively improving the temperature protection reliability.
In addition, in other embodiments, the stable resistance of the heating element can be determined according to the resistance change data collected in the process of heating for a long time to reach stable wet firing, the ratio of the resistance change value to the initial resistance of the heating element is used as the resistance change rate to conduct large-class classification to determine the type of the heating element, and different gears are distinguished by combining the type of the heating element. After the TCR value is determined by table lookup, a temperature protection threshold value is obtained by calculation, when the controller detects suction negative pressure, the atomized medium is heated, and when the resistance value of the heating element is detected to be greater than or equal to the temperature protection threshold value, the heating is stopped or the heating power is reduced.
Specifically, the atomized medium is heated to stable wet burning, the resistance change rate of the heating element is analyzed according to ADC sampling data of the heating element, and 600-800 ms is needed to reach stable wet burning from the beginning of heating of the atomized medium. If the difference between the sampled data acquired in the preset time is smaller than the preset threshold, stable wet burning can be considered to be achieved. As shown in fig. 9, the horizontal axis represents time (ms), the vertical axis represents ADC sampling value, a is the ADC sampling value change curve of the heating element a in the process of heating to stable wet firing, the ADC sampling value at the time of stable wet firing is subtracted by the initial ADC sampling value at the time of starting heating, and the difference is divided by the initial ADC sampling value to obtain the resistance change rate of the heating element a. And B is an ADC sampling value change curve of the heating body B in the process of heating to stable wet burning, subtracting an initial ADC sampling value when heating is started from the ADC sampling value when stable wet burning, and dividing the difference value by the initial ADC sampling value to obtain the resistance change rate of the heating body B.
The TCR can be divided into a gear A, a gear B and a gear C, and if the resistance change rate of the heating element is smaller than a first threshold value Yth1, the TCR of the heating element is considered to be positioned in the gear A; if the resistance change rate of the heating element is greater than or equal to a first threshold value Yth1 and less than a second threshold value Yth2, the TCR of the heating element is considered to be in the B gear; if the rate of change of the resistance of the heat-generating body is greater than or equal to the second threshold value Yth2, the TCR of the heat-generating body is considered to be in the C range. The specific values of the first threshold value Yth1 and the second threshold value Yth2 can be adjusted according to actual situations, and in this embodiment, the first threshold value Yth1 and the second threshold value Yth2 are respectively 0.23 and 0.25. It will be appreciated that in other embodiments, the TCR may be divided into a gear a and a gear B, and if the resistance change rate of the heating element is smaller than the threshold value Yth, the TCR of the heating element is considered to be in the gear a; if the rate of change of the resistance of the heat-generating body is greater than or equal to the threshold value Yth, the TCR of the heat-generating body is considered to be in the B range. Wherein the threshold value Yth may be selected to be 0.24.
It should be understood that, although the steps in the flowcharts described above are shown in order as indicated by the arrows, these steps are not necessarily performed in order as indicated by the arrows. The steps are not strictly limited to the order of execution unless explicitly recited herein, and the steps may be executed in other orders. Moreover, at least some of the steps in the flowcharts described above may include a plurality of sub-steps or a plurality of stages, which are not necessarily performed at the same time, but may be performed at different times, and the order of execution of the sub-steps or stages is not necessarily sequential, but may be performed alternately or alternately with at least a part of the sub-steps or stages of other steps or other steps.
Based on the same inventive concept, the embodiment of the application also provides a heating control device of the electronic atomization device for realizing the heating control method of the electronic atomization device. The implementation of the solution provided by the device is similar to the implementation described in the above method, so the specific limitation in the embodiments of the heating control device of one or more electronic atomizing devices provided below may refer to the limitation of the heating control method of the electronic atomizing device hereinabove, and will not be repeated herein.
In one embodiment, as shown in fig. 11, there is also provided a heating control device of an electronic atomizing device, including: a data acquisition module 100, a data analysis module 200, a data processing module 300, and a temperature control module 400, wherein:
the data acquisition module 100 is configured to, after detecting that the electronic atomization device contains an atomized medium, heat the atomized medium to obtain resistance change data of a heating element in the atomized medium.
The data analysis module 200 is used for determining the resistance temperature coefficient of the heating element according to the resistance change data.
The data processing module 300 is configured to determine a temperature protection threshold according to a temperature coefficient of resistance of the heating element.
The temperature control module 400 is configured to control the electronic atomization device to perform atomization according to a temperature protection threshold.
In one embodiment, the data analysis module 200 obtains the resistance change rate of the heating element according to the resistance change data; and determining the resistance temperature coefficient of the heating element according to the resistance change rate of the heating element.
In one embodiment, the data analysis module 200 determines a resistance change curve from the resistance change data, and performs a linear fit from the resistance change curve to obtain a resistance change rate of the heating element. In this embodiment, a resistance change curve is determined according to the resistance change data collected during short-time heating, and then a linear fitting is performed according to the resistance change curve to determine the resistance change rate of the heating element.
In one embodiment, the data analysis module 200 determines a stable resistance value according to the resistance change data, and takes the ratio of the resistance change value to the initial resistance value of the heating element as the resistance change rate; the resistance change value is the difference between the stable resistance value and the initial resistance value. In this embodiment, resistance change data in the process of heating for a long time to stabilize the wet firing is collected, and the ratio of the resistance change value to the initial resistance value of the heating element is taken as the resistance change rate.
In one embodiment, the data analysis module 200 determines the temperature coefficient of resistance corresponding to the heating element according to the value interval in which the rate of change of resistance of the heating element is located.
In one embodiment, the data analysis module 200 determines the heater type based on the rate of change of resistance of the heater; and determining the resistance temperature coefficient of the heating element according to the resistance change rate of the heating element and the numerical interval corresponding to the type of the heating element.
In one embodiment, the temperature control module 400 controls the electronic atomization device to heat the atomized medium after detecting the suction negative pressure, and performs temperature control when the resistance value of the heating element is greater than or equal to the heating temperature threshold value.
In one embodiment, the temperature control module 400 controls the electronic atomizing device to stop heating or reduce heating power when the resistance of the heating body is greater than or equal to the heating temperature threshold.
The above-described respective modules in the heating control device of the electronic atomizing device may be realized in whole or in part by software, hardware, and combinations thereof. The modules can be embedded in the controller in the electronic atomization device in a hardware form or can be independent of the controller in the electronic atomization device, and can also be stored in a memory in the electronic atomization device in a software form, so that the controller can conveniently call and execute the operations corresponding to the modules.
In one embodiment, there is also provided an electronic atomizing device including a sampling circuit and a controller, the sampling circuit being connected to the controller, the controller being configured to perform heating control according to the method described above. In addition, the electronic atomization device further comprises a negative pressure sensing device connected with the controller.
In one embodiment, there is also provided a computer readable storage medium having stored thereon a computer program which when executed by a processor performs the steps of: after detecting that the electronic atomization device contains an atomization medium, heating the atomization medium to obtain resistance change data of a heating element in the atomization medium; determining the resistance temperature coefficient of the heating element according to the resistance change data; determining a temperature protection threshold according to the resistance temperature coefficient of the heating element; and controlling the electronic atomization device to perform atomization according to the temperature protection threshold value.
In one embodiment, the computer program when executed by the processor further performs the steps of: obtaining the resistance change rate of the heating element according to the resistance change data; and determining the resistance temperature coefficient of the heating element according to the resistance change rate of the heating element.
In one embodiment, the computer program when executed by the processor further performs the steps of: and determining a resistance change curve according to the resistance change data, and performing linear fitting according to the resistance change curve to obtain the resistance change rate of the heating element.
In one embodiment, the computer program when executed by the processor further performs the steps of: determining a stable resistance value according to the resistance change data, and taking the ratio of the resistance change value to the initial resistance value of the heating body as a resistance change rate; the resistance change value is the difference between the stable resistance value and the initial resistance value.
In one embodiment, the computer program when executed by the processor further performs the steps of: and determining the temperature coefficient of resistance corresponding to the heating element according to the numerical interval of the resistance change rate of the heating element.
In one embodiment, the computer program when executed by the processor further performs the steps of: determining the type of the heating element according to the resistance change rate of the heating element; and determining the resistance temperature coefficient of the heating element according to the resistance change rate of the heating element and the numerical interval corresponding to the type of the heating element.
In one embodiment, the computer program when executed by the processor further performs the steps of: after the suction negative pressure is detected, the electronic atomization device is controlled to heat the atomization medium, and the temperature control is performed when the resistance value of the heating body is greater than or equal to the heating temperature threshold value.
In one embodiment, the computer program when executed by the processor further performs the steps of: when the resistance value of the heating body is larger than or equal to the heating temperature threshold value, the electronic atomization device is controlled to stop heating or reduce heating power.
Those skilled in the art will appreciate that implementing all or part of the above described methods may be accomplished by way of a computer program stored on a non-transitory computer readable storage medium, which when executed, may comprise the steps of the embodiments of the methods described above. Any reference to memory or other medium used in the various embodiments provided herein can include at least one of non-volatile and volatile memory. The nonvolatile Memory may include Read-Only Memory (ROM), magnetic tape, floppy disk, flash Memory, optical Memory, high density embedded nonvolatile Memory, resistive random access Memory (ReRAM), magnetic random access Memory (Magnetoresistive Random Access Memory, MRAM), ferroelectric Memory (Ferroelectric Random Access Memory, FRAM), phase change Memory (Phase Change Memory, PCM), graphene Memory, and the like. Volatile memory can include random access memory (Random Access Memory, RAM) or external cache memory, and the like. By way of illustration, and not limitation, RAM can be in the form of a variety of forms, such as static random access memory (Static Random Access Memory, SRAM) or dynamic random access memory (Dynamic Random Access Memory, DRAM), and the like. The processors referred to in the embodiments provided herein may be general purpose processors, central processing units, graphics processors, digital signal processors, programmable logic units, quantum computing-based data processing logic units, etc., without being limited thereto.
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples merely represent a few embodiments of the present application, which are described in more detail and are not to be construed as limiting the scope of the invention. It should be noted that it would be apparent to those skilled in the art that various modifications and improvements could be made without departing from the spirit of the present application, which would be within the scope of the present application. Accordingly, the scope of protection of the present application is to be determined by the claims appended hereto.

Claims (11)

1. A heating control method of an electronic atomizing device, characterized by comprising:
after detecting that an electronic atomization device contains an atomization medium, heating the atomization medium to obtain resistance change data of a heating element in the atomization medium;
determining the temperature coefficient of resistance of the heating element according to the resistance change data;
determining a temperature protection threshold according to the resistance temperature coefficient of the heating element;
And controlling the electronic atomization device to perform atomization according to the temperature protection threshold.
2. The heating control method according to claim 1, wherein the determining the temperature coefficient of resistance of the heating element from the resistance change data includes:
obtaining the resistance change rate of the heating element according to the resistance change data;
and determining the temperature coefficient of resistance of the heating element according to the change rate of the resistance of the heating element.
3. The heating control method according to claim 2, wherein the obtaining the resistance change rate of the heating element from the resistance change data includes:
and determining a resistance change curve according to the resistance change data, and performing linear fitting according to the resistance change curve to obtain the resistance change rate of the heating element.
4. The heating control method according to claim 2, wherein the obtaining the resistance change rate of the heating element from the resistance change data includes:
determining a stable resistance value according to the resistance change data, and taking the ratio of the resistance change value to the initial resistance value of the heating body as a resistance change rate; the resistance change value is the difference between the stable resistance value and the initial resistance value.
5. The heating control method according to claim 2, wherein the determining the temperature coefficient of resistance of the heating element from the rate of change of resistance of the heating element includes:
and determining the temperature coefficient of resistance corresponding to the heating element according to the numerical interval of the resistance change rate of the heating element.
6. The heating control method according to claim 5, wherein the determining the temperature coefficient of resistance corresponding to the heating element according to the value interval in which the rate of change of resistance of the heating element is located includes:
determining the type of the heating element according to the resistance change rate of the heating element;
and determining the resistance temperature coefficient of the heating element according to the resistance change rate of the heating element and the numerical interval corresponding to the type of the heating element.
7. The heating control method according to any one of claims 1 to 6, characterized in that the controlling the electronic atomizing device to atomize according to the temperature protection threshold includes:
and after the suction negative pressure is detected, controlling the electronic atomization device to heat the atomization medium, and controlling the temperature when the resistance of the heating body is greater than or equal to the heating temperature threshold.
8. The heating control method according to claim 7, characterized in that the temperature control is performed when the resistance value of the heating body is greater than or equal to the heating temperature threshold value, comprising:
and when the resistance value of the heating body is larger than or equal to the heating temperature threshold value, controlling the electronic atomization device to stop heating or reduce heating power.
9. A heating control device of an electronic atomizing device, comprising:
the data acquisition module is used for heating the atomization medium after detecting that the electronic atomization device contains the atomization medium, and acquiring resistance change data of a heating body in the atomization medium;
the data analysis module is used for determining the resistance temperature coefficient of the heating element according to the resistance change data;
the data processing module is used for determining a temperature protection threshold according to the resistance temperature coefficient of the heating element;
and the temperature control module is used for controlling the electronic atomization device to perform atomization according to the temperature protection threshold value.
10. An electronic atomizing device comprising a sampling circuit and a controller, the sampling circuit being connected to the controller, the controller being adapted to perform heating control according to the method of any one of claims 1-8.
11. A computer readable storage medium, on which a computer program is stored, characterized in that the computer program, when being executed by a processor, implements the steps of the method of any of claims 1 to 8.
CN202210829544.3A 2022-07-15 2022-07-15 Electronic atomizing device, heating control method thereof, control device and storage medium Pending CN117426569A (en)

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CN202210829544.3A CN117426569A (en) 2022-07-15 2022-07-15 Electronic atomizing device, heating control method thereof, control device and storage medium

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