Dry burning detection method and electronic atomization device

Abstract

The invention relates to a dry burning detection method and an electronic atomization device. The method comprises the following steps: executing an acquisition step: acquiring a first heating resistance value of the heating component and a first actual negative pressure value in the atomization cavity; according to the first heating resistance value and the first actual negative pressure value, a current resistance value threshold value is determined, dry burning detection is conducted on the atomizer, and the current resistance value threshold value changes along with changes of the collected first actual negative pressure value. According to the method, based on the corresponding relation between the negative pressure value and the resistance threshold value of the heating body in the heat balance state, the dry burning state of the device can be accurately judged on the basis of the resistance value change condition of the heating body under the condition that the negative pressure value changes.

Description

Technical Field

[0001] This application relates to the field of electronic atomization technology, and particularly to a dry-burning detection method and an electronic atomization device. Background Art

[0002] Existing electronic atomization devices generally include an atomizer and a battery assembly. A heating element is provided in the atomizer to heat the aerosol-forming matrix stored in the atomizer to form an aerosol under the drive of the battery. The atomizer and the battery assembly are pluggable and connectable. The atomizer is usually for single use. After the aerosol-forming matrix in the atomizer is used up, a new atomizer is replaced. The battery assembly can be reused. After the atomizer is used up, a new atomizer can be replaced for operation.

[0003] During the operation of the electronic atomization device, the aerosol will be used or absorbed by means of negative pressure suction. However, in the prior art, the dry-burning detection method detects through a preset resistance threshold of the heating element. Due to environmental impacts, various errors may exist, resulting in inaccurate dry-burning detection results. Summary of the Invention

[0004] Based on this, it is necessary to provide a more accurate dry-burning detection method, device, computer device, computer-readable storage medium, and computer program product for the above technical problems.

[0005] In a first aspect, this application provides a dry-burning detection method; applied to an electronic atomization device, the electronic atomization device includes an atomizer and a heating component, and the method includes:

[0006] Perform a collection step: collect a first heating resistance value of the heating component and a first actual negative pressure value in the atomization chamber;

[0007] Determine a current resistance value threshold according to the first actual negative pressure value, and the current resistance value threshold changes with the collected first actual negative pressure value;

[0008] Perform a dry-burning detection on the atomizer according to the first heating resistance value and the current resistance value threshold.

[0009] In one embodiment, the performing a dry-burning detection on the atomizer according to the first heating resistance value and the first actual negative pressure value includes:

[0010] Find the current resistance value threshold corresponding to the first actual negative pressure value;

[0011] If the first heating resistance value is greater than the current resistance value threshold, determine that the atomizer is in a dry-burning state.

[0012] In one embodiment, finding the current resistance value threshold corresponding to the first actual negative pressure value includes:

[0013] Finding the corresponding current resistance value threshold from a preset relationship table according to the first actual negative pressure value; wherein, the preset relationship table is used to record the corresponding relationship between the preset negative pressure value and the preset resistance value threshold in the atomizer.

[0014] In one embodiment, finding the corresponding current resistance value threshold from the preset relationship table according to the first actual negative pressure value includes:

[0015] Finding the reference negative pressure value corresponding to the first actual negative pressure value among the preset negative pressure values in the preset relationship table;

[0016] If the first actual negative pressure value is consistent with the reference negative pressure value, obtaining the preset resistance value threshold corresponding to the reference negative pressure value from the preset relationship table as the current resistance value threshold;

[0017] If the first actual negative pressure value is inconsistent with the reference negative pressure value, determining the current resistance value threshold corresponding to the first actual negative pressure value according to the function fitting relationship between the preset negative pressure value and the preset resistance value threshold in the preset relationship table.

[0018] In one embodiment, finding the reference negative pressure value corresponding to the first actual negative pressure value among the preset negative pressure values in the preset relationship table includes:

[0019] Calculating the negative pressure difference between the first actual negative pressure value and all the preset negative pressure values in the preset relationship table;

[0020] Taking the preset negative pressure value with the smallest negative pressure difference in the preset relationship table as the reference negative pressure value.

[0021] In one embodiment, when finding the corresponding current resistance value threshold from the preset relationship table according to the first actual negative pressure value; wherein, the preset relationship table is used to record the corresponding relationship between the preset negative pressure value and the preset resistance value threshold in the atomizer, the method further includes:

[0022] Collecting multiple second heating resistance values of the heating component during the heating process;

[0023] If it is determined that the heating component reaches the thermal equilibrium state according to the second heating resistance value, collecting multiple third heating resistance values of the heating component in the thermal equilibrium state and multiple second actual negative pressure values in the atomization chamber;

[0024] Associating and storing the negative pressure average value of the multiple second actual negative pressure values and the resistance average value of the multiple third heating resistance values in the preset relationship table.

[0025] In one embodiment, after collecting a plurality of second heating resistance values of the heating component during heating, the method further includes:

[0026] If the change amplitude of the plurality of second heating resistance values is less than a first preset threshold, it is determined that the heating component reaches a thermal equilibrium state;

[0027] Alternatively, if the standard deviation of the plurality of second heating resistance values is less than a second preset threshold, it is determined that the heating component reaches a thermal equilibrium state.

[0028] In one embodiment, dry-burning detection of the atomizer is performed according to a current resistance value threshold determined based on the first heating resistance value and the first actual negative pressure value, including:

[0029] Search for the current resistance value threshold corresponding to the first actual negative pressure value;

[0030] If the first heating resistance value is greater than the current resistance value threshold, return to execute the collection step;

[0031] If the first heating resistance value detected continuously N times is greater than the current resistance value threshold corresponding to the collected first actual negative pressure value, it is determined that the atomizer is in a dry-burning state, where N is a positive integer greater than 1.

[0032] In a second aspect, the present application further provides an electronic atomization device, including a heating component, a pressure sensor, a memory, and a processor. A computer program is stored in the memory in the atomization chamber, and when the processor executes the computer program, the following steps are implemented:

[0033] Execute the collection step: collect the first heating resistance value of the heating component and the first actual negative pressure value in the atomization chamber;

[0034] According to the current resistance value threshold determined based on the first actual negative pressure value, the current resistance value threshold changes with the collected first actual negative pressure value;

[0035] Perform dry-burning detection of the atomizer according to the first heating resistance value and the current resistance value threshold.

[0036] The dry-burning detection method and the electronic atomization device provided by this application collect the first heating resistance value of the heating element in the atomizer and the first actual negative pressure value in the atomization chamber during the working process of the atomization device; according to the current resistance value threshold corresponding to the first actual negative pressure value, as the judgment basis for the dry-burning state, if the first heating resistance value of the heating element is greater than the current resistance value threshold, it is determined that the atomizer is in a dry-burning state; based on the corresponding relationship between the negative pressure value and the resistance threshold of the heating element in the thermal equilibrium state, it is possible to accurately judge the dry-burning state of the device based on the change of the resistance value of the heating element when the negative pressure value changes. Description of the Drawings

[0037] Figure 1 It is an application environment diagram of the dry-burning detection method in an embodiment;

[0038] Figure 2 It is a flowchart of the dry-burning detection method in an embodiment;

[0039] Figure 3 It is a flowchart of determining the current resistance value threshold in an embodiment;

[0040] Figure 4 It is a flowchart of finding the corresponding current resistance value threshold from the preset relationship table in an embodiment;

[0041] Figure 5 It is a curve graph of the collected heating resistance value in an embodiment;

[0042] Figure 6 It is a curve graph of the collected negative pressure value in an embodiment;

[0043] Figure 7 It is a structural block diagram of the dry-burning detection device in an embodiment. Detailed Embodiments

[0044] In order to make the purpose, technical solutions and advantages of this application clearer, the following further details this application in combination with the drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain this application and are not used to limit this application.

[0045] The electronic atomization device of the present application is used to heat an aerosol-generating substrate to generate an aerosol for user use. Among them, the heating method can be convection, conduction, radiation or a combination thereof. The form of the aerosol-generating substrate can be liquid, gel, paste or solid, etc. When the aerosol-generating substrate is solid, it can be in the form of crushed, granulated, powdered, granular, strip-shaped or sheet-shaped solid. The aerosol-generating substrate includes but is not limited to materials for medical, health preservation, health, and beauty purposes. For example, the aerosol-generating substrate is a liquid medicine, oil, or the aerosol-generating substrate is a plant material, such as the roots, stems, leaves, flowers, buds, seeds of plants, etc. That is, the embodiments of the present application do not limit the heating method, form, and use of the aerosol-generating substrate.

[0046] In the above-mentioned electronic atomization device, the atomizer usually loads different types of aerosol-generating substrates. In order to make each atomization component have a good heating effect when heating different types of aerosol-generating substrates, each heating element usually needs to be connected to a power supply interface adapted thereto. These power supply interfaces are usually set in the battery component. However, since the battery component and the atomizer are pluggable, when the atomizer is inserted into the battery component, the situation where the atomizer is not accurately inserted into the battery component (inserted backwards) may occur. At this time, each heating element is not accurately connected to the corresponding power supply interface, so it is impossible to ensure that each atomization component in the atomizer has a good heating effect, thus affecting the overall heating effect of the atomizer.

[0047] In the traditional technical solution, the aerosol will be used or absorbed by means of negative pressure suction. Due to the change of the negative pressure value during the suction process, the atomization temperature of the aerosol will also change accordingly. For example, when sucking with a slightly larger negative pressure, because the atomization temperature will be relatively low, it will cause a lag in judging dry burning, and then generate a burnt smell. Another example is that when sucking with a smaller negative pressure, because the atomization temperature will be relatively high, it is easy to trigger a false detection of dry burning.

[0048] In order to effectively solve the above technical problems, the present application technology proposes a dry burning detection method, which can be applied to, for example Figure 1In the electronic atomization device 100 shown. The interior of the electronic atomization device 100 mainly includes module components such as a heating component 101, a pressure sensor 102, a processor 103, a memory 104, and a battery assembly 105. Among them, the heating component 101 is mainly used to heat the aerosol-forming matrix in the atomization chamber of the device to generate aerosol in the atomization chamber. The pressure sensor 102 is used to detect the negative pressure value in the atomization chamber in real time. The processor 103 is used to receive the negative pressure value collected by the pressure sensor 102 and perform dry-burning detection on the device based on this negative pressure value; at the same time, the processor 103 can also collect the temperature values of the heating component 101 and the atomization chamber through a built-in temperature sensor and control the heating component. The memory 104 in the device is mainly used to store various types. The battery assembly 105 is mainly used to provide power for the processor 103 and the heating component 101.

[0049] During the use of the electronic atomization device, the heating coil in the heating component 101 heats the atomization chamber, and the processor in the device executes the parameter collection step in real time, collects the current heating resistance value in the heating component 101, and the pressure sensor 102 collects the actual negative pressure value in the current atomizer, which are respectively recorded as the first heating resistance value and the first actual negative pressure value. Further, it is necessary to determine the corresponding current resistance threshold under the thermal equilibrium state according to the first actual negative pressure value, and this threshold will change with the change of the first negative pressure value collected. Judging according to the first heating resistance value and the current resistance value threshold to determine whether the heating component is currently in a dry-burning state, so as to realize accurate dry-burning detection of the electronic atomization device.

[0050] In one embodiment, as Figure 2 shown, a dry-burning detection method is provided. Taking the application of this method to the Figure 1 electronic atomization device as an example, it includes the following steps:

[0051] Step 202, perform the collection step: collect the first heating resistance value of the heating component and the first actual negative pressure value in the atomization chamber.

[0052] In the embodiment, the heating component is a component or part with an electric heating element built in, which is used to heat the aerosol-forming matrix in the atomizer to generate aerosol; among them, the electric heating element includes but is not limited to a heating coil, a heating wire, or a heating film, etc. Further, the first heating resistance value in the embodiment refers to the resistance value of the electric heating element in the heating component collected in real time during the use of the electronic atomization device. The electronic atomization device in the embodiment is also provided with a pressure sensor, which can collect the negative pressure value in the atomizer cavity in real time; during the use of the electronic atomization device, when the heating component reaches the thermal equilibrium state, the negative pressure value collected in the atomizer cavity in real time can be recorded as the first actual negative pressure value.

[0053] Exemplarily, in a scenario where an electronic atomization device is used, after the atomizer is connected to the heating component, in response to a user's control instruction, the electric heating element in the heating component is powered on and starts to heat until the heating component reaches a thermal equilibrium state. In the embodiment, a temperature sensor inside the heating component and a temperature sensor arranged on the surface of the electric heating element can be used to determine whether it is in a thermal equilibrium state. Specifically, if the temperature on the surface of the electric heating element is the same as the air temperature inside the component, the heating component has reached a thermal equilibrium state. When it is determined that the thermal equilibrium state has been reached, with the current input to the electric heating element being clear, the voltage value across the two ends of the electric heating element is collected in real time by a voltage sensor, and the real-time heating resistance value is calculated using the current-voltage method and denoted as the first heating resistance value. For example, in the embodiment, the first heating resistance value calculated by the current-voltage method is 780 Ω. In the embodiment, the negative pressure value inside the atomizer cavity can be collected by a pressure sensor. For example, the negative pressure value inside the atomizer cavity collected in real time is 370 Pa.

[0054] Step 204, perform a dry-burning detection on the atomizer according to the current resistance value threshold determined by the first actual negative pressure value.

[0055] Among them, the current resistance value threshold changes with the first actual negative pressure value collected. In the embodiment, the resistance value threshold is the dry-burning threshold, and what the dry-burning threshold represents is the critical value at which the heating component changes from the normal heating state to the dry-burning state.

[0056] Exemplarily, in the embodiment, the way to determine the current resistance value threshold can be determined according to the corresponding relationship between the preset negative pressure value and the resistance value threshold; and this corresponding relationship can be pre-written into the processor in the device in the form of a program file. After it is determined through the foregoing steps that the heating component has reached a thermal equilibrium state, according to the first actual negative pressure value collected and the pre-determined corresponding relationship, the resistance value threshold corresponding to the first actual negative pressure value is further determined. For example, in the embodiment, the negative pressure value inside the atomizer cavity collected under the thermal equilibrium state is 500 Pa; according to the corresponding relationship between the negative pressure value and the resistance value threshold, the resistance value threshold in the case where the negative pressure value is 500 Pa is further determined, that is, the dry-burning threshold is 784 Ω.

[0057] Step 206, perform a dry-burning detection on the atomizer according to the first heating resistance value and the current resistance value threshold.

[0058] Exemplarily, the internal resistance of the electric heating element in the heating component collected in real time under the thermal equilibrium state is 720 Ω; by comparing the internally collected resistance value with the dry-burning threshold, it can be determined that the atomizer is not in a dry-burning state under the current thermal equilibrium state.

[0059] In the above dry-burning detection method, the current resistance value threshold corresponding to the first actual negative pressure value in the thermal equilibrium state of the heating element is used as the basis for judging the dry-burning state. Among them, the thermal equilibrium state refers to the state in which the resistance value of the heating component remains constant during the heating process. If the current heating resistance value of the heating element is greater than the current resistance value threshold, it is determined that the atomizer is in a dry-burning state. Based on the corresponding relationship between the negative pressure value and the resistance threshold in the thermal equilibrium state of the heating element, it is possible to accurately judge the dry-burning state of the device based on the change in the resistance value of the heating element when the negative pressure value changes.

[0060] In order to be able to more accurately judge whether the atomizer is in a dry-burning state, in one embodiment, as Figure 3 shown, the dry-burning detection of the atomizer according to the current resistance value threshold determined by the first heating resistance value and the first actual negative pressure value includes:

[0061] Step 302, find the current resistance value threshold corresponding to the first actual negative pressure value.

[0062] In the embodiment, the method for finding the current resistance value threshold based on the first actual negative pressure value includes but is not limited to: indexing according to the pre-established corresponding relationship between the negative pressure value and the resistance value threshold, indexing the corresponding relationship according to the determined actual negative pressure value to determine the corresponding resistance value threshold; or, through the method of function fitting, reasonably calculating according to the currently determined actual negative pressure value to obtain the corresponding resistance value threshold.

[0063] More specifically, in the embodiment, the thermal equilibrium state may also refer to the atomization equilibrium state. In the thermal equilibrium state of the embodiment, the energy supplied by the heating component should be equal to the sum of the heat taken away by the vaporization of the aerosol-forming matrix, the heat radiation energy, and the heat transfer energy. It should be noted that in the thermal equilibrium state, the temperature of the heating component is related to the boiling point of the aerosol-forming matrix and is also related to the negative pressure in the atomizer cavity.

[0064] Exemplarily, in the embodiment, when the electronic atomization device is in the product testing stage and the atomizer runs to the thermal equilibrium state, a plurality of negative pressure values in different test environments can be collected through a pressure sensor, and a plurality of resistance values when the heating component is constantly heated are collected at different negative pressure values (under the negative pressure environment of the atomizer); and the collected resistance values are used as the resistance value thresholds corresponding to the negative pressure values (or under the negative pressure environment), and the corresponding relationship between the negative pressure value and the resistance value threshold is constructed and saved. During the product use process, according to the actual negative pressure value collected in the actual scenario, the resistance value threshold corresponding to the actual negative pressure value is determined through the indexing of the corresponding relationship.

[0065] Step 304, if the first heating resistance value is greater than the current resistance value threshold, it is determined that the atomizer is in a dry-burning state.

[0066] Exemplarily, after determining the actual negative pressure value implemented in the atomizer and finding and determining the corresponding resistance value threshold according to the actual negative pressure value; further, based on the current-voltage method, the real-time heating resistance value of the heating component is measured, and the found resistance value threshold is used as the dry-burning threshold to judge the operating state of the current heating component. If the real-time heating resistance value is greater than the dry-burning threshold, it is determined that the atomizer is in a dry-burning state. For example, if the dry-burning threshold determined by looking up through the actual negative pressure value is 756 Ω, and the heating resistance value of the heating component when it runs to the thermal equilibrium state is 780 Ω, it can be determined that the atomizer is currently in a dry-burning state. On the contrary, if the heating resistance value of the heating component when it runs to the thermal equilibrium state is 740 Ω, it can be determined that the atomizer is not currently in a dry-burning state.

[0067] Furthermore, in the embodiment, when it is determined that the electronic atomizer is in a dry-burning state, corresponding warning information can be triggered for visual display, and at the same time, the dry-burning protection action of the heating component is triggered. For example, the voltage value at both ends of the electro-heating element in the heating component is adjusted, so as to adjust the heating resistance value of the electro-heating element, and finally the operating state of the heating component is adjusted to avoid potential safety hazards caused by overheating.

[0068] In one embodiment, the process of finding the current resistance value threshold corresponding to the first actual negative pressure value in the method may include the following steps:

[0069] According to the first actual negative pressure value, find the corresponding current resistance value threshold from the preset relationship table. Wherein, the preset relationship table is used to record the corresponding relationship between the preset negative pressure value and the preset resistance value threshold in the atomizer.

[0070] In the embodiment, the corresponding relationship between the preset negative pressure value and the preset resistance value threshold can be recorded and saved by constructing a preset relationship table. In this preset relationship table, the preset negative pressure value corresponds to the historical resistance value one by one. For example, in the embodiment, multiple preset negative pressure values in different test environments are collected through a barometric pressure sensor, and multiple historical resistance values of the heating component during constant heating are collected at different preset negative pressure values; and the collected resistance values are used as the resistance value thresholds corresponding to the preset negative pressure values, and the corresponding relationship between the negative pressure value and the resistance value threshold is constructed and saved. Further, in the embodiment, the corresponding relationship between the negative pressure value and the resistance value threshold is stored in the form of a relationship table:

[0071] Table 1 Relationship Table of Negative Pressure Value and Resistance Value Threshold

[0072]

[0073] Further, in the embodiment, multiple rounds of testing and adjustment can be performed on the electronic atomization device to obtain a more accurate correspondence between the negative pressure value and the resistance value threshold. The update methods for the preset relationship in the embodiment include, but are not limited to, adding or overwriting. When updating the dry-burning threshold corresponding to the negative pressure value already written in the relationship table in the embodiment, the overwriting method can be used. For example, in the embodiment, when the negative pressure value is measured multiple times to be 500 Pa, the corresponding dry-burning threshold is 781 Ω. If the dry-burning threshold in the preset relationship table needs to be updated, the record of 500 Pa in the table needs to be overwritten. The updated preset relationship table is shown in Table 2:

[0074] Table 2 Relationship Table of Negative Pressure Value and Resistance Value Threshold

[0075]

[0076] For another example, in the embodiment, it is measured that when the negative pressure value is 370 Pa, the dry-burning threshold of the heating component is 790 ohms; therefore, a new record needs to be added to Table 1. The updated preset relationship table after adding the record is shown in Table 3:

[0077] Table 3 Relationship Table of Negative Pressure Value and Resistance Value Threshold

[0078]

[0079] In the embodiment, by constructing a preset relationship table, the correspondence between the negative pressure value and the resistance value threshold is recorded more directly and clearly, and the update of the correspondence is realized through the update of the preset relationship table, which also further improves the search efficiency of the resistance threshold.

[0080] In one embodiment, as Figure 4 shown, the process of finding the corresponding current resistance value threshold from the preset relationship table according to the first actual negative pressure value in the method may include the following steps:

[0081] Step 402, find the reference negative pressure value corresponding to the first actual negative pressure value among the preset negative pressure values in the preset relationship table.

[0082] In the embodiment, the reference negative pressure value refers to the preset negative pressure value used as a reference object for the actual negative pressure value during the comparison and screening process.

[0083] Exemplarily, in the process of finding the resistance value threshold based on the preset relationship table in the embodiment, when the actual negative pressure value in the atomizer cavity is collected, the actual negative pressure value is compared item by item with each preset negative pressure value recorded in the preset relationship table; each preset negative pressure value in the preset relationship table is used as the reference negative pressure value to compare with the actual negative pressure value to determine whether they are consistent.

[0084] Step 404, if the first actual negative pressure value is the same as the reference negative pressure value, obtain the preset resistance value threshold corresponding to the reference negative pressure value from the preset relation table as the current resistance value threshold.

[0085] Exemplarily, in the usage scenario of an electronic atomization device, the actual negative pressure value in the atomizer cavity is collected in real time as 500 Pa; this actual negative pressure value is used as an index, and all the preset negative pressure values recorded in the preset relation table are used as reference negative pressure values for comparison and judgment. If there is a reference negative pressure value that is the same as this actual negative pressure value, that is, there is a preset negative pressure value of 500 Pa in the preset relation table, the resistance value threshold of 784 Ω corresponding to 500 Pa is used as the finally found resistance value threshold, that is, the current resistance value threshold corresponding to the first actual negative pressure value.

[0086] Step 406, if the first actual negative pressure value is not the same as the reference negative pressure value, determine the current resistance value threshold corresponding to the first actual negative pressure value according to the function fitting relationship between the preset negative pressure value and the preset resistance value threshold in the preset relation table.

[0087] In the embodiment, the function fitting relationship is a data processing process in which, given a number of known historical discrete negative pressure values, by adjusting a number of undetermined coefficients in the initialization function, the difference between the function and the preset resistance value threshold is minimized.

[0088] Exemplarily, the actual negative pressure value in the atomizer cavity is collected in real time as 678 Pa. If it is determined through comparison and search that there is no reference negative pressure value in the preset relation table that is the same as the actual negative pressure value; then the current resistance value threshold corresponding to the actual negative pressure value will be calculated by means of function operation according to the function fitting relationship between the preset negative pressure value and the preset resistance value threshold in the preset relation table. For example, the function fitting relationship in the embodiment is a linear relationship. Based on the corresponding relationship recorded in Table 3: the threshold corresponding to a negative pressure of 370 Pa is 790 ohms, and the threshold corresponding to a negative pressure of 1000 Pa is 765 Ω. The resistance value threshold R1 corresponding to 678 Pa is calculated as R1 = (765 - 790) / (1000 - 370) * (678 - 370) + 790 = 777 Ω. In the embodiment, the resistance value threshold is determined by means of precise comparison and search or function fitting, making the search result more accurate.

[0089] In one embodiment, in the process of searching for the reference negative pressure value corresponding to the first actual negative pressure value among the preset negative pressure values in the preset relation table, the following steps may further be included:

[0090] Step 1, calculate the negative pressure difference between the first actual negative pressure value and all the preset negative pressure values in the preset relation table.

[0091] Step 2, take the preset negative pressure value with the smallest negative pressure difference in the preset relation table as the reference negative pressure value.

[0092] Exemplarily, in the process of looking up the resistance value threshold based on the preset relation table, it is possible that the current actual negative pressure value is not recorded in the preset relation table. In response to this situation, the embodiment first needs to determine the negative pressure value range into which the actual negative pressure value falls. The two end point values of this negative pressure value range are two preset negative pressure values adjacent to the actual negative pressure value in the preset relation table. Further, after determining the negative pressure value range, the distance between the actual negative pressure value and the two end points, that is, the negative pressure difference, is further judged. The end point value with a smaller negative pressure value is selected as the final reference negative pressure value, and the resistance value threshold corresponding to the reference negative pressure value is further used as the resistance value threshold corresponding to the actual negative pressure value. For example, the actual negative pressure value collected in the embodiment is 678 Pa, and its negative pressure value range is (500, 1000). If the negative pressure value closer to the actual negative pressure value is selected according to the end points of the negative pressure value range, then 500 Pa will be selected as the reference negative pressure value, and further 784 Ω corresponding to 500 Pa will be used as the resistance value threshold in the 678 Pa environment. The simpler and more direct reference negative pressure value lookup method in the embodiment can effectively improve the efficiency of the current resistance value threshold determination process in the embodiment.

[0093] In one embodiment, before the method looks up the corresponding current resistance value threshold from the preset relation table according to the first actual negative pressure value, the method further includes the following steps: collecting a second heating resistance value of the heating component during the heating process and a second actual negative pressure value in the atomization chamber, and storing them in the preset relation table according to the second heating resistance value and the second actual negative pressure value.

[0094] In the embodiment, the second heating resistance value refers to the heating resistance value of the electrothermal element in the heating component collected in scenarios such as product testing or maintenance of the electronic atomization device. The second actual negative pressure value refers to the negative pressure value collected by the pressure sensor in scenarios such as product testing or maintenance of the electronic atomization device.

[0095] Exemplarily, in the embodiment, when testing the product of the electronic atomization device, multiple historical heating resistance values of the heating component are collected under different working states of the electronic atomization device. At the same time, the historical negative pressure value in the atomization chamber under the same working state is collected through the pressure sensor. According to the corresponding relationship between the historical heating resistance value and the historical negative pressure value under the same working state, a preset relation table is constructed.

[0096] In one embodiment of the method, the process of collecting the second heating resistance value of the heating component during the heating process and the second actual negative pressure value in the atomization chamber and storing them in the preset relation table according to the second heating resistance value and the second actual negative pressure value may specifically include the following steps:

[0097] Step 1: Collect multiple second heating resistance values of the heating component during the heating process.

[0098] Step 2: If it is determined that the heating component reaches the thermal equilibrium state based on the second heating resistance values, then collect multiple third heating resistance values of the heating component in the thermal equilibrium state, and multiple second actual negative pressure values in the atomization chamber.

[0099] Step 3: Correlate and save the negative pressure mean value of the multiple second actual negative pressure values and the resistance mean value of the multiple third heating resistance values to a preset relationship table.

[0100] In the embodiment, the third heating resistance value is the heating resistance value continuously collected after the heating component reaches the thermal equilibrium state in scenarios such as testing or maintenance. Exemplarily, as Figure 5 shown, in the scenario of product testing of the electronic atomization device, the heating resistance value of the heating component will be continuously collected. According to the thermal equilibrium judgment method provided in the foregoing embodiment, based on the multiple continuously collected heating resistances, it is judged whether the heating component reaches the thermal equilibrium state. When it is determined that the heating component reaches the thermal equilibrium state, the heating resistance value of the heating component will also remain in a relatively constant state, and multiple heating resistance values after the heating component reaches the thermal equilibrium state are collected; meanwhile, the negative pressure value sensor is called to collect the negative pressure value in the atomizer chamber, denoted as the second actual negative pressure value. In order to more accurately describe the corresponding relationship between the negative pressure value and the resistance value threshold, in the embodiment, the multiple heating resistance values in the thermal equilibrium state are averaged, and the calculated resistance mean value is used as the resistance value threshold corresponding to the second actual negative pressure value; and it is further saved to the preset relationship table.

[0101] It should be noted that, as Figure 6 shown, in the embodiment, the second actual negative pressure value collected can be the average negative pressure value within a certain time before or after the current moment when the heating component reaches the thermal equilibrium state, or the negative pressure value at the current moment.

[0102] Furthermore, in the embodiment, the corresponding function expression can also be obtained by performing regression prediction on the resistance mean value; for example, according to the resistance mean value R in the thermal equilibrium state, and the dry-burning threshold T under the maximum heating power of the measured heating component, a linear regression is performed to obtain the regression equation T = R + h, where h is a fixed resistance value; or the regression equation is: T = k * R, where k is a proportionality coefficient. And the dry-burning threshold T corresponding to the resistance mean value R is calculated through the regression equation, that is, the resistance value threshold. Another example, if the resistance mean value R is 780Ω and the regression equation is T = R + 10; then the calculated resistance value threshold is 790Ω.

[0103] In one embodiment, after the method collects multiple second heating resistance values of the heating component during the heating process, the following steps may further be included:

[0104] If the change amplitudes of multiple second heating resistance values are less than a first preset threshold, it is determined that the heating component reaches a thermal equilibrium state; or, if the standard deviation of multiple second heating resistance values is less than a second preset threshold, it is determined that the heating component reaches a thermal equilibrium state.

[0105] Specifically in the embodiment, both the first preset threshold and the second preset threshold are hyperparameters set in advance, and this hyperparameter is used to determine whether the heating component has reached the thermal equilibrium state.

[0106] Exemplarily, the condition for the heating component to reach thermal equilibrium can be that the change amplitude of the heating resistance value within a certain time is not greater than a certain threshold, or the standard deviation of the heating resistance value is not greater than a certain threshold. For example, when the change amplitude of the heating resistance value is not greater than 10 Ω, it can be determined that the heating component has reached the thermal equilibrium state.

[0107] In one embodiment, in order to more accurately determine the thermal equilibrium state of the heating component, the process of performing dry-burning detection on the atomizer according to the current resistance value threshold determined by the first heating resistance value and the first actual negative pressure value in the method may further include the following steps:

[0108] Step 1, find the current resistance value threshold corresponding to the first actual negative pressure value.

[0109] Step 2, if the first heating resistance value is greater than the current resistance value threshold, return to execute the acquisition step.

[0110] Step 3, if the first heating resistance value detected continuously for N times is greater than the current resistance value threshold corresponding to the collected first actual negative pressure value, it is determined that the atomizer is in a dry-burning state, where N is a positive integer greater than 1.

[0111] Exemplarily, in the scenario of using an electronic atomization device, after the current resistance value threshold corresponding to the actual negative pressure value in the atomizer cavity, a comparison and judgment of the resistance value is performed. If the current resistance value of the heating component is greater than the current resistance threshold, return to the acquisition step, cyclically acquire the heating resistance value of the heating component, and individually judge whether each heating resistance value is greater than the current resistance value threshold. If there are continuously multiple heating resistances greater than the current resistance value threshold, it is determined that the atomizer is in a dry-burning state. For example, in the embodiment, if the resistance value data of 10 continuously acquired heating resistances is greater than the current resistance value threshold, it can be determined that the atomizer is in a dry-burning state. Additionally, in the embodiment, the frequency of acquiring the heating resistance can be determined by a clock pulse signal. By setting multiple rounds of acquisition and judgment processes in the embodiment, the judgment result of the dry-burning detection can be made more accurate.

[0112] Combined with the specific use scenario of the electronic atomization device, the dry-burning detection method in the technical solution of the present application is completely described as follows:

[0113] Step 1: Construct a preset relationship table.

[0114] 1. Continuously obtain the resistance value of the heating element.

[0115] 2. Determine whether the resistance value reaches the thermal equilibrium state. The condition for reaching the thermal equilibrium state can be that the change range of the resistance value within a certain time is not greater than a certain threshold, or the standard deviation of the resistance value is not greater than a certain threshold. If the equilibrium is reached, determine the equilibrium value R. The equilibrium value R can be the resistance value at the current moment or the average value of the resistance values within a certain time. According to the equilibrium value R, determine the corresponding dry-burning threshold T. T can be T = R + h, where h is a fixed resistance value; or T = k * R, where k is a proportionality coefficient. For example, if the equilibrium value is 780, then the threshold can be 790, which is a fixed increase of 10 from the equilibrium value.

[0116] 3. If the thermal equilibrium state has been reached, determine that the heating element is in the thermal equilibrium state and obtain the reference negative pressure P under this equilibrium state. The reference negative pressure P can be the average negative pressure value within a certain time before or after the current moment, or the negative pressure value at the current moment.

[0117] 4. Write the corresponding relationship between the negative pressure value and the dry-burning threshold into the preset relationship table. The writing method can be to add or overwrite.

[0118] Step 2: Judge the dry-burning state based on the preset relationship table.

[0119] 1. Continuously obtain the resistance value R and the negative pressure P of the heating element, and calculate the resistance value R and the negative pressure P1 for the next operation. Among them, R1 can be R, or the average value of R within a certain time before the current moment; P1 can be P, or the average value of P within a certain time before the current moment. For example, P1 is 678 Pa and R1 is 780 Ω.

[0120] 2. Based on the aforementioned preset relationship table, obtain the threshold T1 according to P1. The method of obtaining T1 through P1 can be a linear relationship or the threshold corresponding to the similar negative pressure in the table. For example, P1 = 678 Pa, and the negative pressure value 678 Pa is between the negative pressure values 370 Pa and 1000 Pa. In the preset relationship table, the threshold corresponding to the negative pressure value 370 Pa is 790 Ω, and the threshold corresponding to the negative pressure 1000 Pa is 765 Ω. According to the linear relationship, calculate T1 = (765 - 790) / (1000 - 370) * (678 - 370) + 790 = 777 Ω. If the threshold of the similar negative pressure is taken, because the negative pressure 678 Ω is closer to the negative pressure 1000 Pa in the table, so T1 directly takes the threshold 765 Ω corresponding to the negative pressure 1000 Pa.

[0121] 3. Compare and judge the relationship between R1 and T1. If R1 is greater than T1 (it is also possible to judge several consecutive time points, and only when all of these consecutive time points are greater is it considered to meet the conditions), then it is currently in a dry burning state. According to the above example, R1 = 780Ω, T1 = 777Ω (linear calculation), R1 > T1, and it is judged that it is currently in a dry burning state.

[0122] It should be understood that although the various steps in the flowcharts involved in the above embodiments are sequentially shown according to the indications of the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless there is a clear indication in this article, the execution of these steps has no strict order limit, and these steps can be executed in other orders. Moreover, at least a part of the steps in the flowcharts involved in the above embodiments may include multiple steps or multiple stages. These steps or stages are not necessarily executed at the same moment, but can be executed at different moments. The execution order of these steps or stages is not necessarily sequential, but can be executed alternately or in turn with at least a part of other steps or steps or stages in other steps.

[0123] Based on the same inventive concept, the embodiments of the present application also provide a dry burning detection device for implementing the dry burning detection method involved above. The implementation solutions provided by this device to solve problems are similar to the implementation solutions described in the above method. Therefore, the specific limitations in one or more embodiments of the following dry burning detection device can refer to the limitations on the dry burning detection method in the above text, and will not be repeated here.

[0124] In one embodiment, as Figure 7 shown, a dry burning detection device 700 is provided, which is applied to an electronic atomization device. The electronic atomization device includes an atomizer and a heating component. The device 700 includes: a balance state detection module 702 and a dry burning state detection module 704, where:

[0125] The balance state detection module 702 is used to perform the acquisition step: acquire the first heating resistance value of the heating component and the first actual negative pressure value in the atomization chamber.

[0126] The dry burning state detection module 704 is used to determine the current resistance value threshold according to the first actual negative pressure value, and the current resistance value threshold changes with the acquired first actual negative pressure value; and perform dry burning detection on the atomizer according to the first heating resistance value and the current resistance value threshold.

[0127] In one of the embodiments, the dry burning state detection module 704 is further used to find the current resistance value threshold corresponding to the first actual negative pressure value; if the first heating resistance value is greater than the current resistance value threshold, it is determined that the atomizer is in a dry burning state.

[0128] In one embodiment, the device 700 further includes a data storage module, which is configured to find the corresponding current resistance value threshold from a preset relationship table according to the first actual negative pressure value; wherein, the preset relationship table is used to record the corresponding relationship between the preset negative pressure value in the atomizer and the preset resistance value threshold.

[0129] In one embodiment, the data storage module is further configured to find the reference negative pressure value corresponding to the first actual negative pressure value among the preset negative pressure values in the preset relationship table; if the first actual negative pressure value is consistent with the reference negative pressure value, obtain the preset resistance value threshold corresponding to the reference negative pressure value from the preset relationship table as the current resistance value threshold; if the first actual negative pressure value is inconsistent with the reference negative pressure value, determine the current resistance value threshold corresponding to the first actual negative pressure value according to the function fitting relationship between the preset negative pressure value and the preset resistance value threshold in the preset relationship table.

[0130] In one embodiment, the data storage module is further configured to calculate the negative pressure difference between the first actual negative pressure value and all the preset negative pressure values in the preset relationship table; and take the preset negative pressure value with the smallest negative pressure difference in the preset relationship table as the reference negative pressure value.

[0131] In one embodiment, the data storage module is further configured to collect multiple second heating resistance values of the heating component during the heating process; if it is determined that the heating component reaches the thermal equilibrium state according to the second heating resistance values, collect multiple third heating resistance values of the heating component in the thermal equilibrium state and multiple second actual negative pressure values in the atomization chamber; and associate and save the negative pressure average value of the multiple second actual negative pressure values and the resistance average value of the multiple third heating resistance values to the preset relationship table.

[0132] In one embodiment, the data storage module is further configured to determine that the heating component reaches the thermal equilibrium state if the change amplitude of the multiple second heating resistance values is less than a first preset threshold; or determine that the heating component reaches the thermal equilibrium state if the standard deviation of the multiple second heating resistance values is less than a second preset threshold.

[0133] In one embodiment, the dry-burning state detection module 704 is further configured to calculate the negative pressure difference between the first actual negative pressure value and all the preset negative pressure values in the preset relationship table; and take the preset negative pressure value with the smallest negative pressure difference in the preset relationship table as the reference negative pressure value.

[0134] Each module in the above dry-burning detection device can be implemented in whole or in part by software, hardware, and their combination. The above modules can be embedded in the processor in the computer device in the form of hardware or be independent of the processor, or be stored in the memory in the computer device in the form of software, so that the processor can call and execute the operations corresponding to the above respective modules.

[0135] In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the following steps are implemented:

[0136] If the heating component reaches a thermal equilibrium state, then execute the acquisition step: acquire the first heating resistance value of the heating component and the first actual negative pressure value in the atomization chamber;

[0137] Perform dry-burning detection on the atomizer according to the current resistance value threshold determined by the first heating resistance value and the first actual negative pressure value, where the current resistance value threshold varies with the acquired first actual negative pressure value.

[0138] In one of the embodiments, when the computer program is executed by a processor, the following steps are further implemented:

[0139] Find the current resistance value threshold corresponding to the first actual negative pressure value; if the first heating resistance value is greater than the current resistance value threshold, then determine that the atomizer is in a dry-burning state.

[0140] In one of the embodiments, when the computer program is executed by a processor, the following steps are further implemented:

[0141] Find the corresponding current resistance value threshold from a preset relationship table according to the first actual negative pressure value; where the preset relationship table is used to record the corresponding relationship between the preset negative pressure value and the preset resistance value threshold in the atomizer.

[0142] In one of the embodiments, when the computer program is executed by a processor, the following steps are further implemented:

[0143] Find the reference negative pressure value corresponding to the first actual negative pressure value among the preset negative pressure values in the preset relationship table; if the first actual negative pressure value is consistent with the reference negative pressure value, then obtain the preset resistance value threshold corresponding to the reference negative pressure value from the preset relationship table as the current resistance value threshold; if the first actual negative pressure value is inconsistent with the reference negative pressure value, then determine the current resistance value threshold corresponding to the first actual negative pressure value according to the function fitting relationship between the preset negative pressure value and the preset resistance value threshold in the preset relationship table.

[0144] In one of the embodiments, when the computer program is executed by a processor, the following steps are further implemented:

[0145] Calculate the negative pressure difference between the first actual negative pressure value and all the preset negative pressure values in the preset relationship table; take the preset negative pressure value with the smallest negative pressure difference in the preset relationship table as the reference negative pressure value.

[0146] In one of the embodiments, when the computer program is executed by a processor, the following steps are further implemented:

[0147] Collect multiple second heating resistance values of the heating component during the heating process; if it is determined that the heating component reaches the thermal equilibrium state according to the second heating resistance values, collect multiple third heating resistance values of the heating component and multiple second actual negative pressure values in the atomization chamber at the thermal equilibrium state; associate and save the negative pressure average value of the multiple second actual negative pressure values and the resistance average value of the multiple third heating resistance values to a preset relationship table.

[0148] In one embodiment, when the computer program is executed by the processor, the following steps are further implemented:

[0149] If the change amplitude of the multiple second heating resistance values is less than the first preset threshold, it is determined that the heating component reaches the thermal equilibrium state; or, if the standard deviation of the multiple second heating resistance values is less than the second preset threshold, it is determined that the heating component reaches the thermal equilibrium state.

[0150] In one embodiment, find the current resistance value threshold corresponding to the first actual negative pressure value;

[0151] If the first heating resistance value is greater than the current resistance value threshold, return to execute the collection step; if the first heating resistance value detected continuously for N times is greater than the current resistance value threshold corresponding to the collected first actual negative pressure value, it is determined that the atomizer is in a dry burning state, where N is a positive integer greater than 1.

[0152] In one embodiment, an electronic atomization device is provided, including a memory, a processor, and a battery or battery cell for storing electrical energy.

[0153] The processor of the electronic atomization device may include one or more processing cores. The processor uses various interfaces and lines to connect various parts within the entire electronic atomization device, and by running or executing instructions, programs, code sets, or instruction sets stored in the memory, and calling data stored in the memory, it executes various functions of the electronic atomization device and processes data. Optionally, the processor may be implemented in at least one hardware form of digital signal processing (DSP), field-programmable gate array (FPGA), programmable logic array (PLA), or microcontroller unit (MCU).

[0154] The memory of the electronic atomization device may include a non-volatile storage medium and an internal memory. A computer program is stored in the memory. When the processor executes the computer program, the following steps are implemented:

[0155] If the heating component reaches the thermal equilibrium state, the acquisition step is performed: acquiring the first heating resistance value of the heating component and the first actual negative pressure value in the atomization chamber;

[0156] Dry-burning detection is performed on the atomizer according to the current resistance value threshold determined by the first heating resistance value and the first actual negative pressure value, wherein the current resistance value threshold varies with the acquired first actual negative pressure value.

[0157] The technical features of the above embodiments can be combined arbitrarily. For the sake of concise description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in this specification.

[0158] The above embodiments only represent several implementation manners of the present application. The description is relatively specific and detailed, but it should not be construed as a limitation on the patent scope of the present application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. A dry burning detection method, characterized in that, Applied to an electronic atomization device, the electronic atomization device includes a heating component and an atomization chamber, and a pressure sensor is provided in the atomization chamber. The method includes: Performing an acquisition step: acquiring a first heating resistance value of the heating component and a first actual negative pressure value in the atomization chamber; Determining a current resistance value threshold according to the first actual negative pressure value, and the current resistance value threshold changes with the acquired first actual negative pressure value; Performing dry-burning detection on the atomizer according to the first heating resistance value and the current resistance value threshold.

2. The method according to claim 1, wherein The performing dry-burning detection on the atomizer according to the first heating resistance value and the first actual negative pressure value includes: Searching for the current resistance value threshold corresponding to the first actual negative pressure value; If the first heating resistance value is greater than the current resistance value threshold, it is determined that the atomizer is in a dry-burning state.

3. The method according to claim 2, wherein The searching for the current resistance value threshold corresponding to the first actual negative pressure value includes: Searching for the corresponding current resistance value threshold from a preset relationship table according to the first actual negative pressure value; wherein, the preset relationship table is used to record the corresponding relationship between the preset negative pressure value and the preset resistance value threshold in the atomizer.

4. The method according to claim 3, wherein Before searching for the corresponding current resistance value threshold from the preset relationship table according to the first actual negative pressure value, it further includes: Searching for a reference negative pressure value corresponding to the first actual negative pressure value among the preset negative pressure values in the preset relationship table; If the first actual negative pressure value is inconsistent with the reference negative pressure value, determining the current resistance value threshold corresponding to the first actual negative pressure value according to the function fitting relationship between the preset negative pressure value and the preset resistance value threshold in the preset relationship table.

5. The method according to claim 4, characterized in that The searching for a reference negative pressure value corresponding to the first actual negative pressure value among the preset negative pressure values in the preset relationship table includes: Calculating the negative pressure difference between the first actual negative pressure value and all the preset negative pressure values in the preset relationship table; Taking the preset negative pressure value with the smallest negative pressure difference in the preset relationship table as the reference negative pressure value.

6. The method according to claim 3, characterized in that, Before searching for the corresponding current resistance value threshold from the preset relationship table according to the first actual negative pressure value, it further includes: Acquiring a second heating resistance value of the heating component during the heating process and a second actual negative pressure value in the atomization chamber, and saving them to the preset relationship table according to the second heating resistance value and the second actual negative pressure value.

7. The method according to claim 6, wherein The acquiring a second heating resistance value of the heating component during the heating process and a second actual negative pressure value in the atomization chamber, and saving them to the preset relationship table according to the second heating resistance value and the second actual negative pressure value includes: Acquiring multiple second heating resistance values of the heating component during the heating process; If it is determined that the heating component reaches a thermal equilibrium state according to the second heating resistance value, acquiring multiple third heating resistance values of the heating component in the thermal equilibrium state and multiple second actual negative pressure values in the atomization chamber; Associating and saving the negative pressure average value of the multiple second actual negative pressure values and the resistance average value of the multiple third heating resistance values to the preset relationship table.

8. The method according to claim 7, wherein After collecting a plurality of second heating resistance values of the heating component during heating, the method further includes: If the change amplitude of the plurality of second heating resistance values is less than a first preset threshold, it is determined that the heating component reaches a thermal equilibrium state; Alternatively, if the standard deviation of the plurality of second heating resistance values is less than a second preset threshold, it is determined that the heating component reaches a thermal equilibrium state.

9. The method according to claim 1, wherein The dry-burning detection of the atomizer according to the current resistance value threshold determined by the first heating resistance value and the first actual negative pressure value includes: Search for the current resistance value threshold corresponding to the first actual negative pressure value; If the first heating resistance value is greater than the current resistance value threshold, return to execute the acquisition step; If the first heating resistance value detected continuously for N times is greater than the current resistance value threshold corresponding to the collected first actual negative pressure value, it is determined that the atomizer is in a dry-burning state, where N is a positive integer greater than 1.

10. An electronic atomization device, comprising a heating component, a barometric pressure sensor, a memory, and a processor, wherein a computer program is stored in the memory in the atomization chamber, and is characterized in that, When the processor executes the computer program, it implements the steps of the method according to any one of claims 1 to 8.

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