CN113080525A - Aerosol generating device, dry burning detection method and computer program product - Google Patents
Aerosol generating device, dry burning detection method and computer program product Download PDFInfo
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- CN113080525A CN113080525A CN202110283696.3A CN202110283696A CN113080525A CN 113080525 A CN113080525 A CN 113080525A CN 202110283696 A CN202110283696 A CN 202110283696A CN 113080525 A CN113080525 A CN 113080525A
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- 239000000443 aerosol Substances 0.000 title claims abstract description 39
- 238000004590 computer program Methods 0.000 title claims abstract description 36
- 238000001514 detection method Methods 0.000 title claims abstract description 28
- 238000010438 heat treatment Methods 0.000 claims abstract description 283
- 238000005070 sampling Methods 0.000 claims abstract description 128
- 239000000758 substrate Substances 0.000 claims abstract description 23
- 230000000087 stabilizing effect Effects 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 claims description 18
- 238000002485 combustion reaction Methods 0.000 claims description 7
- 238000013021 overheating Methods 0.000 claims description 7
- 238000000889 atomisation Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 4
- 239000003571 electronic cigarette Substances 0.000 description 2
- 238000004134 energy conservation Methods 0.000 description 2
- 238000007667 floating Methods 0.000 description 2
- 230000036541 health Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
- 239000006200 vaporizer Substances 0.000 description 1
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- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24F—SMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES
- A24F40/00—Electrically operated smoking devices; Component parts thereof; Manufacture thereof; Maintenance or testing thereof; Charging means specially adapted therefor
- A24F40/40—Constructional details, e.g. connection of cartridges and battery parts
- A24F40/46—Shape or structure of electric heating means
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- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24F—SMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES
- A24F40/00—Electrically operated smoking devices; Component parts thereof; Manufacture thereof; Maintenance or testing thereof; Charging means specially adapted therefor
- A24F40/50—Control or monitoring
- A24F40/53—Monitoring, e.g. fault detection
Abstract
The present application relates to an aerosol generating device, a dry-fire detection method and a computer program product. The aerosol generating device comprises: a heater comprising at least one heating element configured to heat an aerosol-forming substrate; a power source; and circuitry connected to the heater, the power supply, respectively, the circuitry configured to: acquiring a sampling value of the thermal property of the heating element in real time; controlling the power supplied by the power supply to the heating element when the sampling value exceeds a preset judgment threshold value, and stabilizing the sampling value of the thermal property of the heating element to a target value; acquiring the output power of the heating element; and sending out a prompt when the output power is smaller than a preset power threshold value so as to prompt a user that the heating element is dry-burned. The aerosol generating device judges whether the heating element is burnt or not by utilizing the law of conservation of energy, and has the advantages of simple detection and high accuracy.
Description
Technical Field
The present application relates to the field of aerosol atomization technology, and in particular, to an aerosol generating device, a dry combustion detection method, and a computer program product.
Background
With the development of atomization technology, aerosol atomization technology has emerged, where atomization is achieved by heating an aerosol-forming substrate by means of a heating element, producing an aerosol.
In the use process of the aerosol atomization device, dry burning needs to be avoided, if the aerosol atomization device is still continuously heated when the aerosol forming substrate is lacked, the temperature of a heating element is rapidly increased, dry burning occurs, harmful substances and scorched smell are generated at the moment, normal use is affected, and even the personal health of a user is affected, so that the health of the user can be effectively avoided only by timely detecting the occurrence of the dry burning.
Disclosure of Invention
In view of the above, it is desirable to provide an aerosol generating device, a dry combustion detection method and a computer program product capable of effectively detecting a dry combustion condition.
An aerosol generating device comprising:
a heater comprising at least one heating element configured to heat an aerosol-forming substrate;
a power source; and
circuitry connected to the heater and the power source, respectively, the circuitry configured to:
acquiring a sampling value of the thermal property of the heating element in real time;
when the sampling value exceeds a preset judgment threshold value, controlling the power supply to supply power to the heating element, and stabilizing the sampling value of the thermal property of the heating element to a target value;
acquiring the output power of the heating element;
and sending out a prompt when the output power is smaller than a preset power threshold value so as to prompt a user that the heating element is dry-burned.
In one embodiment, the circuit is further configured to perform, after the step of obtaining in real time sampled values of the thermal property of the heating element:
judging whether the heating element reaches a thermal equilibrium state or not according to the sampling value acquired at the current moment;
if the heating element reaches the thermal equilibrium state, setting the judgment threshold value as a first threshold value; wherein the first threshold is greater than a thermal equilibrium stability value, the thermal equilibrium stability value being a thermal property value of the heating element at thermal equilibrium;
if the heating element does not reach the thermal equilibrium state, setting the judgment threshold value as a second threshold value; wherein the second threshold is a maximum thermal property of the heating element, and the maximum thermal property is a thermal property value of the heating element at a preset maximum safe temperature.
In one embodiment, the circuitry is further configured to:
obtaining each sampling value in a first time length with the current time as an end point based on the current time; the first time comprises a current time;
and if the sampling values in the first time period accord with a preset rule, judging that the heating element reaches the thermal equilibrium state.
In one embodiment, the preset rule is:
and the difference value between the maximum value and the minimum value in each sampling value in the first time length is within a preset difference value range.
In one embodiment, the circuitry is further configured to:
and when the sampling value exceeds the judgment threshold value, acquiring the heating time corresponding to the sampling value exceeding the judgment threshold value.
In one embodiment, the circuitry is further configured to:
and if the heating time is longer than the preset continuous heating time, setting the target value to be longer than the thermal balance stable value.
In one embodiment, the circuitry is further configured to:
and if the heating time is less than the preset continuous heating time and the heating element reaches the overheat balance state, setting the target value to be less than or equal to the thermal balance stable value.
In one embodiment, the circuitry is further configured to:
and if the heating time is less than the preset continuous heating time and the heating element does not reach the overheating equilibrium state, setting the target value to be equal to the maximum thermal property value.
In one embodiment, the circuitry is further configured to:
acquiring an initial sampling value of the heating element;
and determining the maximum value of the thermal property according to the initial sampling value and the preset highest safety temperature.
A dry burning detection method comprises the following steps:
acquiring a sampling value of the thermal property of the heating element in real time;
when the sampling value exceeds a preset judgment threshold value, controlling the sampling value of the thermal property of the heating element to be stabilized to a target value;
acquiring the output power of the heating element;
and sending out a prompt when the output power is smaller than a preset power threshold value so as to prompt a user that the heating element is dry-burned.
In one embodiment, after the step of obtaining the sampled value of the thermal property of the heating element, the method further comprises:
judging whether the heating element reaches a thermal equilibrium state or not according to the sampling value acquired at the current moment;
if the heating element reaches the thermal equilibrium state, setting the judgment threshold value as a first threshold value; wherein the first threshold is greater than a thermal equilibrium stability value, the thermal equilibrium stability value being a thermal property value of the heating element at thermal equilibrium;
if the heating element does not reach the thermal equilibrium state, setting the judgment threshold value as a second threshold value; wherein the second threshold is a maximum thermal property of the heating element, and the maximum thermal property is a thermal property value of the heating element at a preset maximum safe temperature.
In one embodiment, when the sampling value exceeds a preset judgment threshold, the method further includes:
and acquiring the heating time corresponding to the sampling value exceeding the judgment threshold value.
In one embodiment, if the heating time is longer than a preset continuous heating time, the target value is a preset sampling value, and the preset sampling value is longer than the thermal balance stable value.
In one embodiment, the target value is less than or equal to the thermal equilibrium stable value if the heating time is less than a preset duration heating time and the heating element has reached an overheated equilibrium state.
In one embodiment, the target value is equal to the maximum thermal property value if the heating time is less than a preset duration heating time and the heating element has not reached an overheat equilibrium state.
An aerosol generating device, comprising:
a heater comprising at least one heating element configured to heat an aerosol-forming substrate;
a power source; and
circuitry comprising a memory and a processor, the memory storing a computer program, the processor implementing the following steps when executing the computer program:
acquiring a sampling value of the thermal property of the heating element in real time;
when the sampling value exceeds a preset judgment threshold value, controlling the sampling value of the thermal property of the heating element to be stabilized to a target value;
acquiring the output power of the heating element;
and sending out a prompt when the output power is smaller than a preset power threshold value so as to prompt a user that the heating element is dry-burned.
A computer program product having a computer program stored thereon, which computer program, when executed by a processor, performs the steps of:
acquiring a sampling value of the thermal property of the heating element in real time;
when the sampling value exceeds a preset judgment threshold value, controlling the sampling value of the thermal property of the heating element to be stabilized to a target value;
acquiring the output power of the heating element;
and sending out a prompt when the output power is smaller than a preset power threshold value so as to prompt a user that the heating element is dry-burned.
According to the aerosol generating device, the dry combustion detection method and the computer program product, the sampling value of the thermal property of the heating element is obtained in real time, whether the sampling value exceeds the preset judgment threshold value or not is judged, if the sampling value exceeds the preset judgment threshold value, the power supply is controlled to supply power to the heating element, the sampling value of the heating element is stabilized at the target value, the output power of the heating element at the moment is obtained, if the output power is smaller than the preset power threshold value, a dry combustion prompt is sent, whether the dry combustion occurs to the heating element is judged by using the law of energy conservation, the detection is simple, and the accuracy is.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments or the conventional technologies of the present application, the drawings used in the descriptions of the embodiments or the conventional technologies will be briefly introduced below, it is obvious that the drawings in the following descriptions are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic flow chart of a dry fire detection method according to an embodiment;
FIG. 2 is a second flowchart of a dry burning detection method according to an embodiment;
FIG. 3 is a third schematic flow chart illustrating a dry burning detection method according to an embodiment;
FIG. 4 is a fourth flowchart illustrating a dry-fire detection method according to an embodiment;
FIG. 5 is a graph of resistance sample values versus output power for a heating element in one embodiment;
FIG. 6 is a graph of resistance sample values versus output power for a heating element in another embodiment;
FIG. 7 is a graph of sampled resistance values versus output power for a heating element in yet another embodiment;
FIG. 8 is a flowchart illustrating the step of determining a maximum value of a thermal property in one embodiment;
fig. 9 is a schematic structural diagram of an aerosol generating device according to an embodiment.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present application more comprehensible, embodiments accompanying the present application are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth to provide a thorough understanding of the present application, and in the accompanying drawings, preferred embodiments of the present application are set forth. This application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete. This application is capable of embodiments in many different forms than those described herein and those skilled in the art will be able to make similar modifications without departing from the spirit of the application and it is therefore not intended to be limited to the specific embodiments disclosed below.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or be connected to the other element through intervening elements. Further, "connection" in the following embodiments is understood to mean "electrical connection", "communication connection", or the like, if there is a transfer of electrical signals or data between the connected objects.
As used herein, the singular forms "a", "an" and "the" may include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises/comprising," "includes" or "including," etc., specify the presence of stated features, integers, steps, operations, components, parts, or combinations thereof, but do not preclude the presence or addition of one or more other features, integers, steps, operations, components, parts, or combinations thereof. Also, as used in this specification, the term "and/or" includes any and all combinations of the associated listed items.
In one embodiment, as shown in fig. 1, a dry burning detection method is provided, which is applied to an aerosol generating device, and the aerosol generating device comprises: a heater, a power supply and an electrical circuit, wherein the heater comprises at least one heating element configured to heat an aerosol-forming substrate; the circuit is respectively connected with the heater and the power supply. The dry burning detection method comprises the following steps:
step S102, sampling values of the thermal properties of the heating element are acquired in real time.
Wherein the heating element is for heating the aerosol-forming substrate to generate an aerosol; the sampled value of the thermal property of the heating element may be a resistance sampled value or a temperature sampled value of the heating element at any time during the heating process. Specifically, the sampling value may be acquired at the time of receiving the heating trigger signal. Specifically, the aerosol generating device may be an electronic cigarette, a medical vaporizer, or the like, the heating trigger signal may be a trigger signal input by a user through an input component, for example, a key switch or a touch screen, and the electronic cigarette may also detect a suction action of the user as the heating trigger signal through an airflow detection sensor.
Step S103, judging whether the sampling value exceeds a preset judgment threshold value.
Wherein the judgment threshold is used for judging whether the heating element generates temperature surge. If the sampling value does not exceed the judgment threshold value, the heating element is judged not to generate temperature surge, and the step S102 is executed again until the collected sampling value exceeds the judgment threshold value, and the step S104 is executed.
And step S104, controlling the sampling value of the heating element to be stabilized to a target value when the sampling value exceeds a preset judgment threshold value.
If the sampling value exceeds the judgment threshold value, the temperature surge of the heating element is judged, dry burning possibly occurs at the moment, the heating temperature of the heating element needs to be adjusted to be constant, and the sampling value of the thermal property of the heating element can be stabilized at a set target value through intervention of a PID algorithm.
Step S105, acquiring the output power of the heating element.
When the sampling value of the thermal property of the heating element is stabilized at a target value, the output power of the heating element is obtained, and it can be known from the law of conservation of energy that when the heating element is heated at a constant temperature, a portion of the output power is used to heat the aerosol-forming substrate and a portion of the output power is used to absorb heat by the heating element itself, and if the aerosol-forming substrate is reduced, the output power will also be reduced, so that it can be determined whether there is a lack of aerosol-forming substrate according to the output power at that time.
And step S106, judging whether the output power is smaller than a preset power threshold value. And returning to the step S105 when the output power is not less than the power threshold value.
And S107, sending out a prompt when the output power is smaller than a preset power threshold value so as to prompt a user that the heating element is dried.
If the output power is less than the power threshold, i.e. when the aerosol-forming substrate is absent, a dry-fire event may occur, at which time a dry-fire protection procedure for the aerosol-forming substrate may be triggered, e.g. by stopping heating and/or issuing an alarm prompt.
It should be noted that reference to dry-fire in the examples of the present application may refer to dry-fire occurring in the complete absence of the aerosol-forming substrate, or may refer to dry-fire occurring when the aerosol-forming substrate is at a low level and normal use cannot be continued.
According to the dry burning detection method, the sampling value of the thermal property of the heating element is obtained in real time, whether the sampling value exceeds the preset judgment threshold value is judged, if the sampling value exceeds the preset judgment threshold value, the sampling value of the heating element is controlled to be stabilized at the target value, the output power of the heating element at the moment is obtained, if the output power is smaller than the preset power threshold value, the heating element is judged to be in dry burning, a dry burning prompt is sent, whether the heating element is in dry burning is judged by using the law of energy conservation, the detection is simple, and the accuracy is high.
It has been found by the inventors that the heating element will tend to gradually stabilise in temperature during normal heating to a thermal equilibrium state, and will generally not reach a thermal equilibrium state if the heating element dries due to insufficient aerosol-forming substrate, in which case the heating element will experience a temperature surge over a period of time, i.e. the sample value will exceed the decision threshold over that period of time. However, the temperature may be suddenly increased for a short time due to a factor other than the lack of the aerosol-forming substrate, and the reason for the sudden temperature increase disappears by itself after the heating is continued for a while, and the temperature gradually returns to a normal state to enter a thermal equilibrium state.
In order to eliminate the above mentioned effects and avoid false determination, in one embodiment, as shown in fig. 2, after the step of obtaining the sampled value of the thermal property of the heating element, the method further comprises:
step S1021, judging whether the heating element reaches a thermal equilibrium state according to the sampling value acquired at the current moment.
Step S1022, if the heating element reaches the thermal equilibrium state, setting the determination threshold as the first threshold; wherein the first threshold is greater than a thermal equilibrium stability value, which is a thermal property value of the heating element at a thermal equilibrium state.
The thermal equilibrium stable value may be a thermal property sampling value when the heating element enters a thermal equilibrium state in the heating process.
Step S1023, if the heating element does not reach the thermal equilibrium state, setting a judgment threshold value as a second threshold value; the second threshold is a maximum thermal property value of the heating element, and the maximum thermal property value is a thermal property value of the heating element at a preset maximum safety temperature.
If the thermal property value is a resistance value, the maximum value of the thermal property can be calculated according to an initial sampling value of the heating element and a preset maximum safe temperature; and if the thermal attribute value is a temperature value, the maximum value of the thermal attribute is the preset highest safety temperature.
According to the embodiment, whether the heating element reaches the overheating balance state is judged firstly, and then the judgment threshold value is set according to the judgment result, so that the misjudgment reason is eliminated, and the accuracy of dry burning detection is improved.
In one embodiment, as shown in FIG. 3, determining whether the heating element has reached a thermal equilibrium state comprises the steps of:
step S201, obtaining each sampling value in a first time length with the current time as an end point based on the current time; the first time period includes the current time.
Step S202, judging whether each sampling value in the first time length accords with a preset rule. If not, the process returns to step S102. And if the sampling values in the first time period accord with the preset rule, judging that the heating element reaches a thermal equilibrium state.
In one embodiment, the preset rule is: and the difference value between the maximum value and the minimum value in each sampling value in the first time length is within a preset difference value range.
The difference range refers to the fluctuation interval of the resistance sampling value allowed when the heating element is in the thermal equilibrium state, and the heating element can be judged to be in the thermal equilibrium state according to whether the difference falls into the difference range. For example, when the current time is 620 ms at 19 hours, 5 minutes, 10 seconds, and the aerosol generating device acquires the sampled value of the thermal property of the heating element every 200 ms, the first time length may be an integer multiple of 200 ms, for example, 600 ms, and 4 sampled values may be acquired at 19 hours, 5 minutes, 10 seconds, 20 ms to 19 hours, 5 minutes, 10 seconds, and 620 ms, where the maximum value is 580, the minimum value is 578, and the preset difference range is 10, and the difference between the maximum value and the minimum value in each sampled value in the first time length is within the preset difference range, and it may be determined that the heating element reaches thermal equilibrium.
In one embodiment, the preset rule may be that the sample values in the first time period are the same. For example, if the current time is 620 ms at 19 h, 5 min, 10 s, and the aerosol generating device obtains the sampling value of the thermal property of the heating element every 200 ms, the first time may be an integer multiple of 200 ms, for example, 600 ms, 4 sampling values may be obtained at 19 h, 5 min, 10 s, 20 ms to 19 h, 5 min, 10 s, and 620 ms, and when the 4 sampling values are the same, it may be determined that the heating element reaches thermal equilibrium.
In another embodiment, the preset rule may be that the difference values of the sampling values in the first time period are all within a preset range. For example, the current time is 620 ms at 19 hours, 5 minutes, 10 seconds, and the aerosol generating device obtains the sampled value of the thermal property of the heating element every 200 ms, then the first time length may be an integer multiple of 200 ms, for example, 600 ms, 4 sampled values may be obtained at 19 hours, 5 minutes, 10 seconds, 20 ms to 19 hours, 5 minutes, 10 seconds, and 620 ms, which are 578,579,580,578 respectively, and the preset range is 10, and then the difference value of each sampled value in the first time length is within the preset range, and it may be determined that the heating element reaches thermal equilibrium.
In one embodiment, as shown in fig. 5, when the sampled value exceeds the preset judgment threshold, the method further includes:
and step S1031, acquiring the heating time corresponding to the sampling value exceeding the judgment threshold value.
And when the sampling value obtained at a certain moment exceeds the judgment threshold value, obtaining the current corresponding heating time. Specifically, the heating time may refer to the time point, that is, a time, or may refer to a duration from the start of heating to the time, that is, a time period.
Furthermore, the temperature surge caused by the heating element in which case can be distinguished through the preset continuous heating time, and then a proper target value is selected to realize the PID algorithm thermostatic control.
As shown in fig. 4, in one embodiment, referring to the graph shown in fig. 5, the method further comprises:
step S1032, judging whether the heating time is longer than the preset continuous heating time;
step S1033, if the heating time is longer than the preset continuous heating time, the target value is a preset sampling value, and the preset sampling value is greater than the thermal equilibrium stability value. In fig. 5, X represents a thermal equilibrium stable value, Y represents a target value, and T represents a continuous heating time.
If the sampling value exceeds the judgment threshold value after the continuous heating time, the target value can be selected as a preset sampling value at the moment, the preset sampling value is larger than a thermal balance stable value, namely, the target value of the heating element is selected as the preset sampling value, the temperature of the heating element is higher than the temperature of the heating element in a thermal balance state during normal work, so that the problem of short-time temperature surge is solved, the heating element can quickly recover to normal work, if the temperature surge is not caused by lack of aerosol forming substrates, the output power of the heating element is kept at a normal level after the heating is controlled at a constant temperature for a period of time by the preset sampling value, namely, the output power is not smaller than a power threshold value, and the condition of misjudgment is eliminated.
As shown in fig. 4, in one embodiment, referring to the graph shown in fig. 6, the method further comprises:
step S1034, judging whether the heating element reaches an overheating equilibrium state;
in step S1035, if the heating time is less than the preset continuous heating time and the heating element has reached the overheat equilibrium state, the target value is less than or equal to the thermal equilibrium stable value.
The thermal equilibrium stable value may be a thermal equilibrium stable value of the heating element in the thermal equilibrium state recorded last time, that is, a thermal equilibrium stable value recorded when the thermal equilibrium state is reached in the heating process of this time. The target value may be smaller than a predetermined float value of the thermal equilibrium stability value, or may be equal to the thermal equilibrium stability value. In fig. 6, X represents a thermal equilibrium stable value, Y represents a target value, and T represents a continuous heating time.
If the sampling value exceeds the judgment threshold value before the continuous heating time, the target value can be selected as a thermal balance stable value or a preset floating value floating below the thermal balance stable value, so that the heating element works at a safe heating temperature and the temperature is not continuously increased to exceed the highest safe temperature. At this time, whether the aerosol-forming substrate is insufficient or not can be accurately and safely judged according to whether the output power is less than the power threshold, that is, whether dry burning occurs or not is judged.
As shown in fig. 4, in one embodiment, referring to the graph shown in fig. 7, the method further comprises:
in step S1036, if the heating time is less than the preset continuous heating time and the heating element has not reached the overheat equilibrium state, the target value is equal to the maximum thermal property value. In fig. 7, X represents a thermal equilibrium stable value, Y represents a target value, and T represents a continuous heating time.
As the steady value of thermal equilibrium at which the heating element reaches a state of thermal equilibrium when the aerosol-forming substrate is sufficient will generally be less than the maximum value of the thermal property. However, with repeated heating, the initial sampling value of the heating element may change slowly, for example, the initial sampling value may gradually increase, and at this time, the thermal equilibrium stability value may also gradually increase, and at this time, the initial sampling value may gradually approach the maximum thermal property value, and even exceed the maximum thermal property value, and at this time, a false determination may be caused, if the sampling value exceeds the determination threshold value before the continuous heating time, and the heating element does not reach the overheat equilibrium state in the heating process, at this time, the thermal equilibrium stability value may be selected as the target value, or the maximum thermal property value may be directly used as the target value to perform temperature control, and then it is determined whether the output power of the heating element at the target value is smaller than the power threshold value, so as.
In one embodiment, as shown in fig. 8, the dry burning detection method further includes:
in step S301, an initial sampling value of the heating element is obtained.
The initial sampling value refers to a sampling value of the thermal property of the heating element at a normal temperature, and may also be understood as a sampling value when heating is not started. In the present embodiment, the sampling value can be understood as a resistance value.
Step S302, determining the maximum value of the thermal property according to the initial sampling value and the preset maximum safe temperature.
In this embodiment, the maximum thermal property is a resistance value of the heating element at the highest safety temperature, and when the highest safety temperature is determined, the maximum thermal property may be determined according to a resistance temperature coefficient of the heating element, where the following formula is:
Stop＝S0+Ktcr*(Ttop-T0)
wherein S istopIs the maximum value of the thermal property, S0For the initial miningSample value, KtcrIs the temperature coefficient of resistance, T, of the heating elementtopTo the maximum safe temperature, T0The temperature is normal temperature (for example, the normal temperature may be 25 ℃).
It should be understood that although the steps in the flowcharts of fig. 1-4, 8 are shown in order as indicated by the arrows, the steps are not necessarily performed in order as indicated by the arrows. The steps are not performed in the exact order shown and described, and may be performed in other orders, unless explicitly stated otherwise. Moreover, at least some of the steps in fig. 1-4 and 8 may include multiple steps or multiple stages, which are not necessarily performed at the same time, but may be performed at different times, and the order of performing the steps or stages is not necessarily sequential, but may be performed alternately or alternatively with other steps or at least some of the other steps.
In one embodiment, as shown in fig. 9, there is provided an aerosol generating device comprising: a heater 701, a power source (not shown), and a circuit 702. Wherein the heater 701 comprises at least one heating element configured to heat the aerosol-forming substrate; the circuit 702 is connected to the heater 701 and the power supply, respectively, the circuit 702 being configured for:
acquiring a sampling value of the thermal property of the heating element in real time;
controlling the power supplied by the power supply to the heating element when the sampling value exceeds a preset judgment threshold value, and stabilizing the sampling value of the thermal property of the heating element to a target value;
acquiring the output power of the heating element;
and sending out a prompt when the output power is smaller than a preset power threshold value so as to prompt a user that the heating element is dry-burned.
And sending out a prompt when the output power is smaller than a preset power threshold, specifically sending out the prompt in a voice mode, a light mode and the like.
In one embodiment, the circuit is further configured to perform, after the step of obtaining in real time the sampled value of the thermal property of the heating element:
judging whether the heating element reaches a thermal equilibrium state or not according to a sampling value acquired at the current moment;
if the heating element reaches a thermal equilibrium state, setting a judgment threshold value as a first threshold value; wherein the first threshold is greater than a thermal equilibrium stability value, the thermal equilibrium stability value being a thermal property value of the heating element in a thermal equilibrium state;
if the heating element does not reach the thermal equilibrium state, setting the judgment threshold value as a second threshold value; the second threshold is a maximum thermal property value of the heating element, and the maximum thermal property value is a thermal property value of the heating element at a preset maximum safety temperature.
In one embodiment, the circuitry is further configured to:
obtaining each sampling value in a first time length with the current time as an end point based on the current time; the first time comprises a current time;
and if the sampling values in the first time period accord with a preset rule, judging that the heating element reaches the thermal equilibrium state.
In one embodiment, the preset rule is:
and the difference value between the maximum value and the minimum value in each sampling value in the first time length is within a preset difference value range.
In one embodiment, the circuitry is further configured to:
and when the sampling value exceeds the judgment threshold value, acquiring the heating time corresponding to the sampling value exceeding the judgment threshold value.
In one embodiment, the circuitry is further configured to:
and if the heating time is longer than the preset continuous heating time, setting the target value to be longer than the thermal balance stable value.
In one embodiment, the circuitry is further configured to:
if the heating time is less than the preset continuous heating time and the heating element reaches the overheat balance state, setting the target value to be less than or equal to the thermal balance stable value.
In one embodiment, the circuitry is further configured to:
and if the heating time is less than the preset continuous heating time and the heating element does not reach the overheating equilibrium state, setting the target value equal to the maximum value of the thermal property.
In one embodiment, the circuitry is further configured to:
acquiring an initial sampling value of the heating element;
and determining the maximum value of the thermal property according to the initial sampling value and the preset highest safety temperature.
For specific limitations of the aerosol generating device, reference may be made to the above limitations of the dry-fire detection method, which are not described herein again.
In one embodiment, there is also provided a circuit for an aerosol generating device, the circuit being configured to perform the dry-fire detection method.
In one embodiment, an aerosol generating device is provided that includes a heater, a power source, and an electrical circuit. The heater comprises at least one heating element configured to heat the aerosol-forming substrate. The circuit comprises a memory and a processor, the memory stores a computer program, and the processor realizes the following steps when executing the computer program:
acquiring a sampling value of the thermal property of the heating element in real time;
when the sampling value exceeds a preset judgment threshold value, controlling the sampling value of the thermal property of the heating element to be stabilized to a target value;
acquiring the output power of the heating element;
and sending out a prompt when the output power is smaller than a preset power threshold value so as to prompt a user that the heating element is dry-burned.
In one embodiment, the processor, when executing the computer program, further performs the steps of:
judging whether the heating element reaches a thermal equilibrium state or not according to a sampling value acquired at the current moment;
if the heating element reaches a thermal equilibrium state, setting a judgment threshold value as a first threshold value; wherein the first threshold is greater than a thermal equilibrium stability value, the thermal equilibrium stability value being a thermal property value of the heating element in a thermal equilibrium state;
if the heating element does not reach the thermal equilibrium state, setting the judgment threshold value as a second threshold value; the second threshold is a maximum thermal property value of the heating element, and the maximum thermal property value is a thermal property value of the heating element at a preset maximum safety temperature.
In one embodiment, the processor, when executing the computer program, further performs the steps of:
obtaining each sampling value in a first time length with the current time as an end point based on the current time; the first time comprises the current time;
and if the sampling values in the first time period accord with the preset rule, judging that the heating element reaches a thermal equilibrium state.
In one embodiment, the processor, when executing the computer program, further performs the steps of:
and when the sampling value exceeds the judgment threshold value, acquiring the heating time corresponding to the sampling value exceeding the judgment threshold value.
In one embodiment, the processor, when executing the computer program, further performs the steps of:
and if the heating time is longer than the preset continuous heating time, setting the target value to be longer than the thermal balance stable value.
In one embodiment, the processor, when executing the computer program, further performs the steps of:
if the heating time is less than the preset continuous heating time and the heating element reaches the overheat balance state, setting the target value to be less than or equal to the thermal balance stable value.
In one embodiment, the processor, when executing the computer program, further performs the steps of:
and if the heating time is less than the preset continuous heating time and the heating element does not reach the overheating equilibrium state, setting the target value equal to the maximum value of the thermal property.
In one embodiment, the processor, when executing the computer program, further performs the steps of:
acquiring an initial sampling value of the heating element;
and determining the maximum value of the thermal property according to the initial sampling value and the preset highest safety temperature.
In one embodiment, a computer program product is provided, having a computer program stored thereon, the computer program, when executed by a processor, performing the steps of:
acquiring a sampling value of the thermal property of the heating element in real time;
when the sampling value exceeds a preset judgment threshold value, controlling the sampling value of the thermal property of the heating element to be stabilized to a target value;
acquiring the output power of the heating element;
and sending out a prompt when the output power is smaller than a preset power threshold value so as to prompt a user that the heating element is dry-burned.
In one embodiment, the computer program when executed by the processor further performs the steps of:
judging whether the heating element reaches a thermal equilibrium state or not according to a sampling value acquired at the current moment;
if the heating element reaches a thermal equilibrium state, setting a judgment threshold value as a first threshold value; wherein the first threshold is greater than a thermal equilibrium stability value, the thermal equilibrium stability value being a thermal property value of the heating element in a thermal equilibrium state;
if the heating element does not reach the thermal equilibrium state, setting the judgment threshold value as a second threshold value; the second threshold is a maximum thermal property value of the heating element, and the maximum thermal property value is a thermal property value of the heating element at a preset maximum safety temperature.
In one embodiment, the computer program when executed by the processor further performs the steps of:
obtaining each sampling value in a first time length with the current time as an end point based on the current time; the first time comprises the current time;
and if the sampling values in the first time period accord with the preset rule, judging that the heating element reaches a thermal equilibrium state.
In one embodiment, the computer program when executed by the processor further performs the steps of:
and when the sampling value exceeds the judgment threshold value, acquiring the heating time corresponding to the sampling value exceeding the judgment threshold value.
In one embodiment, the computer program when executed by the processor further performs the steps of:
and if the heating time is longer than the preset continuous heating time, setting the target value to be longer than the thermal balance stable value.
In one embodiment, the computer program when executed by the processor further performs the steps of:
if the heating time is less than the preset continuous heating time and the heating element reaches the overheat balance state, setting the target value to be less than or equal to the thermal balance stable value.
In one embodiment, the computer program when executed by the processor further performs the steps of:
and if the heating time is less than the preset continuous heating time and the heating element does not reach the overheating equilibrium state, setting the target value equal to the maximum value of the thermal property.
In one embodiment, the computer program when executed by the processor further performs the steps of:
acquiring an initial sampling value of the heating element;
and determining the maximum value of the thermal property according to the initial sampling value and the preset highest safety temperature.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by hardware instructions of a computer program, which can be stored in a non-volatile computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. Any reference to memory, storage, database or other medium used in the embodiments provided herein can include at least one of non-volatile and volatile memory. Non-volatile Memory may include Read-Only Memory (ROM), magnetic tape, floppy disk, flash Memory, optical storage, or the like. Volatile Memory can include Random Access Memory (RAM) or external cache Memory. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM), among others.
In the description herein, references to the description of the terms "in one of the embodiments," "specific," or the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, a schematic description of the above terminology may not necessarily refer to the same embodiment or example.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (17)
1. An aerosol generating device, comprising:
a heater comprising at least one heating element configured to heat an aerosol-forming substrate;
a power source; and
circuitry connected to the heater and the power source, respectively, the circuitry configured to:
acquiring a sampling value of the thermal property of the heating element in real time;
when the sampling value exceeds a preset judgment threshold value, controlling the power supply to supply power to the heating element, and stabilizing the sampling value of the thermal property of the heating element to a target value;
acquiring the output power of the heating element;
and sending out a prompt when the output power is smaller than a preset power threshold value so as to prompt a user that the heating element is dry-burned.
2. An aerosol generating device according to claim 1, wherein the circuit is further configured to perform, after the step of obtaining in real time sampled values of a thermal property of a heating element:
judging whether the heating element reaches a thermal equilibrium state or not according to the sampling value acquired at the current moment;
if the heating element reaches the thermal equilibrium state, setting the judgment threshold value as a first threshold value; wherein the first threshold is greater than a thermal equilibrium stability value, the thermal equilibrium stability value being a thermal property value of the heating element at thermal equilibrium;
if the heating element does not reach the thermal equilibrium state, setting the judgment threshold value as a second threshold value; wherein the second threshold is a maximum thermal property of the heating element, and the maximum thermal property is a thermal property value of the heating element at a preset maximum safe temperature.
3. An aerosol generating device according to claim 2, wherein the circuit is further configured to:
obtaining each sampling value in a first time length with the current time as an end point based on the current time; the first time comprises a current time;
and if the sampling values in the first time period accord with a preset rule, judging that the heating element reaches the thermal equilibrium state.
4. An aerosol generating device according to claim 3, wherein the predetermined rule is:
and the difference value between the maximum value and the minimum value in each sampling value in the first time length is within a preset difference value range.
5. An aerosol generating device according to claim 2, wherein the circuit is further configured to:
and when the sampling value exceeds the judgment threshold value, acquiring the heating time corresponding to the sampling value exceeding the judgment threshold value.
6. An aerosol generating device in accordance with claim 5, wherein the circuit is further configured to:
and if the heating time is longer than the preset continuous heating time, setting the target value to be longer than the thermal balance stable value.
7. An aerosol generating device in accordance with claim 5, wherein the circuit is further configured to:
and if the heating time is less than the preset continuous heating time and the heating element reaches the overheat balance state, setting the target value to be less than or equal to the thermal balance stable value.
8. An aerosol generating device in accordance with claim 5, wherein the circuit is further configured to:
and if the heating time is less than the preset continuous heating time and the heating element does not reach the overheating equilibrium state, setting the target value to be equal to the maximum thermal property value.
9. An aerosol generating device in accordance with claim 1, wherein the circuit is further configured to:
acquiring an initial sampling value of the heating element;
and determining the maximum value of the thermal property according to the initial sampling value and the preset highest safety temperature.
10. A dry burning detection method is characterized by comprising the following steps:
acquiring a sampling value of the thermal property of the heating element in real time;
when the sampling value exceeds a preset judgment threshold value, controlling the sampling value of the thermal property of the heating element to be stabilized to a target value;
acquiring the output power of the heating element;
and sending out a prompt when the output power is smaller than a preset power threshold value so as to prompt a user that the heating element is dry-burned.
11. The dry fire detection method of claim 10, wherein after the step of obtaining the sampled value of the heating element thermal property, the method further comprises:
judging whether the heating element reaches a thermal equilibrium state or not according to the sampling value acquired at the current moment;
if the heating element reaches the thermal equilibrium state, setting the judgment threshold value as a first threshold value; wherein the first threshold is greater than a thermal equilibrium stability value, the thermal equilibrium stability value being a thermal property value of the heating element at thermal equilibrium;
if the heating element does not reach the thermal equilibrium state, setting the judgment threshold value as a second threshold value; wherein the second threshold is a maximum thermal property of the heating element, and the maximum thermal property is a thermal property value of the heating element at a preset maximum safe temperature.
12. The dry burning detection method according to claim 11, wherein when the sampling value exceeds a preset judgment threshold, the method further comprises:
and acquiring the heating time corresponding to the sampling value exceeding the judgment threshold value.
13. The dry combustion detection method as claimed in claim 12, wherein if the heating time is longer than a preset continuous heating time, the target value is a preset sampling value, and the preset sampling value is greater than the thermal equilibrium stability value.
14. The dry fire detection method according to claim 12, wherein the target value is less than or equal to the thermal equilibrium stable value if the heating time is less than a preset continuous heating time and the heating element has reached an overheat equilibrium state.
15. The dry fire detection method of claim 12, wherein the target value is equal to the maximum thermal property value if the heating time is less than a preset duration heating time and the heating element has not reached an overheat equilibrium state.
16. An aerosol generating device, comprising:
a heater comprising at least one heating element configured to heat an aerosol-forming substrate;
a power source; and
circuitry comprising a memory storing a computer program and a processor implementing the steps of the method of any one of claims 10 to 15 when the processor executes the computer program.
17. A computer program product having a computer program stored thereon, characterized in that the computer program, when being executed by a processor, realizes the steps of the method of any one of claims 10 to 15.
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