Dry burning state identification method, device and electronic atomizer

Abstract

The present application relates to a method, device, and electronic atomizer for identifying a dry-burn state. The electronic atomizer comprises: a processing module, a detection circuit, a heating element, and a magnetic core embedded in the heating element, wherein the magnetic core is made of a soft magnetic material; the detection circuit is used to detect the back electromotive force of the heating element; the processing module is used to identify the back electromotive force and, upon detecting a sudden change in the back electromotive force, determine that the electronic atomizer is in a dry-burn state. This method can improve the accuracy of the electronic atomizer in identifying a dry-burn state.

Description

Technical Field

[0001] The present application relates to the field of atomization equipment, and in particular to a method and device for identifying a dry-burning state, and an electronic atomizer. Background Art

[0002] The working principle of an electronic atomizer is mainly to achieve the desired vaping experience by heating the atomized medium through electric heating to evaporate it into an aerosol, which is then inhaled by the consumer. During this process, if the atomized medium is reduced to a point where it cannot be supplied to the heating element in a timely manner, the heating element will dry out. On the one hand, this seriously reduces the consumer experience, and on the other hand, high-temperature dry burning can produce harmful gases or damage the electronic atomizer, affecting the consumer's health. Therefore, the anti-dry burning function of the atomizer has become a hot research area.

[0003] Current anti-dry burning technologies mainly rely on tools such as temperature sensors, capacitance sensors, thermistors, and humidity sensors to determine whether the atomized medium is exhausted. These technical means set different thresholds for different types of atomized media, increasing the probability of inaccurate detection results. Summary of the Invention

[0004] Based on this, it is necessary to provide a method, device and electronic atomizer for identifying a dry burning state that can improve the accuracy of identifying dry burning in order to solve the above technical problems.

[0005] In a first aspect, the present application provides an electronic atomizer.

[0006] The electronic atomizer comprises:

[0007] a processing module, a detection circuit, a heating element, and a magnetic core embedded in the heating element;

[0008] The detection circuit is used to detect the back electromotive force of the heating element;

[0009] The processing module is used to identify the back electromotive force, and when identifying a sudden change in the back electromotive force, determine that the electronic atomizer is in a dry-burning state.

[0010] In one embodiment, the detection circuit includes a sampling unit and a detection storage unit, the detection storage unit is connected to the heating element, and the sampling unit is connected to the detection storage unit;

[0011] The detection storage unit is used to obtain and store the back electromotive force of the heating element; the sampling unit is used to detect and release the back electromotive force stored in the detection storage unit.

[0012] In one embodiment, the detection storage unit includes: a first diode, a capacitor, and a second diode.

[0013] The anode of the first diode is connected to the heating element, one end of the capacitor is connected to the cathode of the first diode and the anode of the second diode respectively, and the other end of the capacitor is connected to the anode of the second diode respectively.

[0014] In one embodiment, the sampling unit includes a first resistor and a second resistor connected in series, wherein an end of the first resistor away from the second resistor is connected between the first diode and the capacitor, an end of the second resistor away from the first resistor is grounded, and the first resistor and the second resistor are connected to the processing module.

[0015] In one embodiment, the electronic atomizer further includes: a power module, the power module being used to supply energy to the heating element; the processing module including a processor and a switch unit, the first end of the processor being connected to the power module, the second end being connected to the enable end of the switch unit, the first end of the switch being connected to the power module, and the second end being connected to the heating element;

[0016] The processor is used to generate a pulse signal to control the switch unit to be turned on or off.

[0017] In one embodiment, the processing module further includes a pulse unit, and the second end of the processing module is connected to the enable end of the switch unit through the pulse unit;

[0018] The processor is used to control the pulse unit to generate a pulse signal to control the switch unit to be turned on or off.

[0019] In one embodiment, the switch unit includes a PMOS tube and a third resistor;

[0020] The gate of the PMOS tube is connected to the pulse unit, the source is connected to the power module, the drain is connected to the heating element, and the third resistor is connected between the pulse unit and the power module.

[0021] In one embodiment, the switch unit includes an NMOS transistor and a fourth resistor;

[0022] The gate of the NMOS tube is connected to the pulse unit, the source is connected to the power module through the heating element, the drain is grounded, and the fourth resistor is connected between the pulse unit and the ground.

[0023] In one embodiment, the magnetic core is made of soft magnetic material.

[0024] In a second aspect, the present application further provides a method for identifying a dry burn state, the method comprising:

[0025] Obtaining a back electromotive force of the heating element and identifying the back electromotive force;

[0026] When a sudden change in the back electromotive force is identified, it is determined that the electronic atomizer is in a dry-burning state.

[0027] In one embodiment, when identifying a sudden change in the back electromotive force, determining that the electronic atomizer is in a dry-burning state includes:

[0028] Obtaining the slope of the electromotive force after the back electromotive force suddenly changes;

[0029] When the slope exceeds a preset threshold, it is determined that the electronic atomizer is in a dry-burning state.

[0030] In a third aspect, the present application further provides a dry-burn state identification device, the device comprising:

[0031] A detection module, configured to obtain a back electromotive force of the heating element and identify the back electromotive force;

[0032] The determination module is used to determine that the electronic atomizer is in a dry-burning state when a sudden change in the back electromotive force is identified.

[0033] The above-mentioned method, device and electronic atomizer for identifying the dry-burning state, the electronic atomizer includes: a processing module, a detection circuit, a heating element and a magnetic core embedded in the heating element, the magnetic core is made of soft magnetic material; the detection circuit is used to detect the back electromotive force of the heating element; the processing module is used to identify the back electromotive force, and when it is identified that the back electromotive force has a sudden change, it is determined that the electronic atomizer is in a dry-burning state. The heating element of the present application is embedded with a magnetic core made of soft magnetic material. Once the temperature of the soft magnetic material exceeds the Curie point temperature, its magnetic permeability will drop sharply, so that the inductance of the heating element will also drop sharply, and the back electromotive force of the heating element will also decrease sharply. Therefore, the present application can determine whether the temperature in the heating electronic atomizer exceeds the Curie point temperature of the soft magnetic material by detecting whether the back electromotive force of the heating element has a sudden change, thereby determining whether the electronic atomizer has dry-burned, thereby improving the accuracy of the detection result. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 This is a schematic diagram of the module structure of the electronic atomizer in the first embodiment;

[0035] Figure 2 is a perspective schematic diagram of the three-dimensional structure of a heating element in one embodiment;

[0036] Figure 3 is a schematic perspective top view of a heating element in one embodiment;

[0037] Figure 4 is a schematic perspective top view of a heating element according to another embodiment;

[0038] Figure 5 is a perspective view of a three-dimensional structure of a heating element according to another embodiment;

[0039] Figure 6 Schematic diagram of the relationship between back electromotive force and time in one embodiment;

[0040] Figure 7 This is a schematic diagram of the module structure of the electronic atomizer in the second embodiment;

[0041] Figure 8 Schematic diagram of the circuit structure of a detection storage unit in one embodiment;

[0042] Figure 9 1 is a schematic diagram of the circuit structure of a detection circuit in one embodiment;

[0043] Figure 10 Schematic diagram of back electromotive force waveform in one embodiment;

[0044] Figure 11 2 is a schematic diagram of the circuit structure of a detection circuit in another embodiment;

[0045] Figure 12 A schematic diagram of a back electromotive force waveform in another embodiment;

[0046] Figure 13 This is a schematic diagram of the module structure of the electronic atomizer in the third embodiment;

[0047] Figure 14 This is a schematic diagram of the module structure of the electronic atomizer in the fourth embodiment;

[0048] Figure 15 This is a schematic diagram of the circuit structure of an electronic atomizer in one embodiment;

[0049] Figure 16 This is a schematic diagram of the internal circuit structure of an electronic atomizer in another embodiment;

[0050] Figure 17 Schematic diagram of a flow chart of a method for identifying a dry-burn state in one embodiment;

[0051] Figure 18 Schematic diagram of the module structure of a device for identifying a dry-burning state in one embodiment. DETAILED DESCRIPTION

[0052] In order to make the purpose, technical solutions and advantages of this application more clear, the following further describes this application in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0053] In one embodiment, an electronic atomizer is provided, such as Figures 1 to 3 As shown, the electronic atomizer includes:

[0054] A power supply module 110, a processing module 120, a detection circuit 130, a heating element 140 and a magnetic core 150 embedded in the heating element 140, wherein the material of the magnetic core has a Curie temperature, and a material with a Curie temperature refers to a material whose magnetic permeability drops sharply after its own temperature exceeds the Curie point temperature. As an example, the magnetic core 150 is made of a soft magnetic material, and a soft magnetic material refers to a material whose magnetic permeability drops sharply after its own temperature exceeds the Curie point temperature. In a specific implementation, the magnetic core 150 can be made of other materials, such as ferromagnetic and ferrimagnetic materials. It can be understood that the Curie point temperature of the soft magnetic material in this application is the dry-burning temperature of the electronic atomizer.

[0055] The power module 110 is connected to the processing module 120 . The processing module 120 is further connected to the detection circuit 130 and the heating element 140 . The detection circuit 130 is connected to the heating element 140 .

[0056] The power module 110 can provide energy to the heating element 140 so that the heating element 140 operates. The processing module 120 is used to control the energy provided by the power module 110 to the heating element 140 to control the power of the heating element 140.

[0057] As an example, Figure 2 and Figure 3 As shown, the heating element 140 includes a cylinder 141 with a cavity 143, and a coil 142 is arranged in the cylinder 141, and the coil 142 has a spiral structure. The coil 142 generates heat when receiving the energy provided by the power module 110, and generates heat together with the cylinder 141 to atomize the atomization generating matrix in the cavity 143. The cavity 143 is used to guide the atomization generating matrix in the electronic atomizer and the atomization generating matrix after atomization, specifically including guiding the atomization generating matrix into the cavity 143, and guiding the atomization generating matrix after atomization to the outside world. Exemplarily, the cylinder 141 can be made of ceramic. It can be understood that the heating element 140 can also be of other shapes or materials. For example, the heating element 140 can be rectangular, and a corresponding spiral coil 142 is also provided therein, such as Figure 4 and 5The magnetic core 150 can be a hollow ring (including a single-hole ring, a multi-hole ring) or a hollow rectangular body (including a single-hole rectangular body, a multi-hole rectangular body), a rectangular body, etc., as long as the magnetic core 150 does not hinder the flow of the atomized matrix and the atomized matrix.

[0058] For ease of understanding, the principles of this application are explained:

[0059] In this application, the heating element 140 has a spiral coil 142, which gives the heating element 140 an inductive characteristic. That is, during operation, the heating element 140 will hinder changes in the current in the circuit. When there is a changing current, a self-induced electromotive force (i.e., back electromotive force) is generated across the inductor in the opposite direction of the supply voltage. Back electromotive force ε = -LdI / dt, where ε represents the back electromotive force, L represents the inductance, and dI / dt represents the rate of change of current over time.

[0060] Inductance L with magnetic core = (k*μ0*μs*N 2 *S) / l, where k represents a coefficient (this coefficient depends on the ratio of the coil radius to the length l), μ0 represents the vacuum magnetic permeability, μs represents the relative magnetic permeability of the magnetic core inside the coil, and μs=1 for an air-core coil, N represents the number of turns of the coil, l represents the length of the coil, and S represents the cross-sectional area of the coil. According to the above formula, it can be deduced that the inductance is proportional to the relative magnetic permeability of the magnetic core inside the coil. At the same time, the magnetic core made of soft magnetic material has the characteristic that the magnetic permeability drops sharply after it exceeds the Curie point temperature, and the corresponding back electromotive force will also change sharply. If the Curie point temperature of the magnetic core made of the soft magnetic material is the same as the dry-burning temperature of the electronic atomizer, then based on this phenomenon, it can be determined whether dry-burning has occurred by judging whether the back electromotive force changes suddenly.

[0061] In this embodiment, the electronic atomizer further includes a detection circuit 130 for detecting the back electromotive force of the heating element 140; the processing module 120 identifies the back electromotive force and determines that the electronic atomizer is in a dry-burning state when a sudden change in the back electromotive force is detected.

[0062] Specifically, during use, the back electromotive force of the heating element 140 is detected by the detection circuit 130 and then transmitted to the processing module 120. The processing module 120 obtains the back electromotive force detected by the detection circuit 130, and then the processing module 120 identifies the back electromotive force and draws a relationship diagram between the back electromotive force and time, for example, Figure 6As shown, the mutation point in the back electromotive force and time relationship diagram is identified. The point inside the solid coil is the mutation point. After the mutation point is identified, it means that the back electromotive force has a mutation. At this time, it is determined that the electronic atomizer is in a dry burning state. Among them, the mutation point refers to the point that violates the law of back electromotive force change corresponding to the pulse signal. For example, if the pulse signal is a square wave, Figure 6 As shown, the points in the dotted circle are points that conform to the changing law of the pulse signal, while the points in the solid circle are mutation points (points that violate the changing law of the back electromotive force corresponding to the pulse signal. The changing law of the back electromotive force is opposite to the changing law of the pulse signal. For example, when the pulse signal changes from low level to high level, the back electromotive force changes from high level to low level, and when the pulse signal changes from high level to low level, the back electromotive force changes from low level to high level).

[0063] The above-mentioned electronic atomizer includes: a processing module, a detection circuit, a heating element and a magnetic core embedded in the heating element, and the magnetic core is made of soft magnetic material; the detection circuit is used to detect the back electromotive force of the heating element; the processing module is used to identify the back electromotive force, and when it is identified that the back electromotive force has a sudden change, it is determined that the electronic atomizer is in a dry-burning state. The heating element of the present application is embedded with a magnetic core made of soft magnetic material. Once the temperature of the soft magnetic material exceeds the Curie point temperature, its magnetic permeability will drop sharply, so that the inductance of the heating element will also drop sharply, and the back electromotive force of the heating element will also become sharply smaller. Therefore, the present application can determine whether the temperature in the heating electronic atomizer exceeds the Curie point temperature of the soft magnetic material by detecting whether the back electromotive force of the heating element has a sudden change, thereby determining whether the electronic atomizer has a dry-burning condition, thereby improving the accuracy of the detection result.

[0064] In one embodiment, Figure 7 As shown, the detection circuit 130 includes a sampling unit 132 and a detection storage unit 131. The detection storage unit 131 is connected to the heating element 140, and the sampling unit 132 is connected to the detection storage unit 131; the detection storage unit 131 is used to obtain the back electromotive force of the heating element 140 and store it; the sampling unit 132 is used to detect and release the back electromotive force stored in the detection storage unit 131.

[0065] In this embodiment, the detection circuit 130 includes a sampling unit 132 and a detection storage unit 131. The detection storage unit 131 is first used to obtain and store the back EMF of the heating element 140. Then, the sampling unit 132 is used to detect and release the back EMF stored in the detection storage unit 131. In a specific implementation, the back EMF measurement can be achieved using an existing back EMF detection chip / module / circuit in the industry (for example, a back EMF detection circuit for an electrode), which is not limited here.

[0066] Specifically, as an example, see Figure 8 The detection storage unit 131 includes: a first diode 1311, a capacitor 1312 and a second diode 1313. The anode of the first diode 1311 is connected to the heating element 140, one end of the capacitor 1312 is respectively connected to the cathode of the first diode 1311 and the anode of the second diode 1313, and the other end of the capacitor 1312 is respectively connected to the anode of the second diode 1313 and the power supply 110 (VBAT).

[0067] Among them, the first diode 1311 is used to isolate the circuit so that the detection storage circuit part can only pass the potential exceeding the power supply voltage; the capacitor 1312 is used to store the generated back electromotive force charge to achieve fast charging and slow discharging effects, which is convenient for detection; the second diode 1313 is used to clamp the storage potential so that the capacitor C1 can only maintain a potential exceeding the power supply voltage, preventing the heating wire from being pulled down to a range below the power supply voltage by the detection circuit when heating, which is convenient for detection.

[0068] Further, as an example, see Figure 9 The sampling unit 132 includes a first resistor 1321 and a second resistor 1322 connected in series, where one end of the first resistor 1321 away from the second resistor 1322 is connected between the first diode 1311 and the capacitor 1312, and one end of the second resistor 1322 away from the first resistor 1321 is grounded. The first resistor 1321 and the second resistor 132 are connected to the processing module 120.

[0069] In this embodiment, two resistors are used for voltage division, thereby reducing the back electromotive force to a voltage within the range that can be measured by the processing module 120, and then directly collected by the processing module 120, and then the back electromotive force corresponding to the heating element 140 is obtained based on the collected voltage and the voltage division ratio of the two resistors.

[0070] According to the above introduction, it can be seen that the sampling unit 132 and the detection storage unit 131 are used in this embodiment to measure the back electromotive force, which are mainly composed of capacitors, resistors and diodes. Compared with the detection circuit of the prior art, it is relatively simpler and has lower cost.

[0071] In the process of measuring the back electromotive force by the sampling unit 132 and the detection storage unit 131, for example, the waveform of the back electromotive force in the heating element 140, the waveform stored in the detection storage unit 131 and the waveform obtained by sampling are respectively as follows: Figure 10 As shown in 1, 2, and 3, the process of the processor 121 determining that the electronic atomizer is in a dry-burning state may include:

[0072] Obtaining the slope of the electromotive force after the back electromotive force suddenly changes;

[0073] When the slope exceeds a preset threshold, it is determined that the electronic atomizer is in a dry-burning state.

[0074] Specifically, since the first diode 1311 is used to isolate the circuit, the detection storage circuit portion can only pass the potential exceeding the supply voltage, and the detection storage unit 131 includes a capacitor 1312, which has the characteristics of fast charging and slow discharging, the back electromotive force waveform obtained by the processor 121 is as follows: Figure 10 As shown in waveform 3, after the mutation point is identified, the slope of the electromotive force after the mutation is determined. When the slope exceeds a preset threshold, it is determined that the electronic atomizer is in a dry-burn state.

[0075] As an example, see Figure 11 The detection storage unit 131 includes: a first diode 1311, a capacitor 1312 and a second diode 1313. The cathode of the first diode 1311 is connected to the heating element 140, one end of the capacitor 1312 is respectively connected to the anode of the first diode 1311 and the anode of the second diode 1313, and the other end of the capacitor 1312 is respectively connected to the cathode of the second diode 1313 and the ground.

[0076] The sampling unit 132 includes a first resistor 1321 and a second resistor 1322 connected in series. The end of the first resistor 1321 away from the second resistor 1322 is connected to the power supply 110 (VBAT), and the end of the second resistor 1322 away from the first resistor 1321 is connected between the first diode 1311 and the capacitor 1312. The first resistor 1321 and the second resistor 132 are connected to the processing module 120.

[0077] The first diode 1311 is used to isolate the detection circuit 130 so that the detection storage unit 131 can only pass negative voltage; the back electromotive force charge generated is stored by the capacitor 1312 to achieve fast charging and slow discharging effects, which is convenient for detection; the second diode 1313 is used to clamp the storage potential so that the capacitor C1 can only maintain a negative voltage potential, preventing the heating wire from being pulled up to the positive voltage range by the detection circuit when heated, which is convenient for detection.

[0078] For example, the waveform of the back electromotive force in the heating element 140, the waveform stored in the detection storage unit 131, and the waveform obtained by sampling are respectively as follows: Figure 10 As shown in Figures 4, 5, and 6, the process of the processor 121 determining that the electronic atomizer is in a dry-burning state may include:

[0079] Obtaining the slope of the electromotive force after the back electromotive force suddenly changes;

[0080] When the slope exceeds a preset threshold, it is determined that the electronic atomizer is in a dry-burning state.

[0081] Specifically, since the first diode 1311 is used to isolate the detection circuit 130, the detection storage unit 131 can only pass negative voltage, and the detection storage unit 131 includes a capacitor 1312, which has the characteristics of fast charging and slow discharging, the back electromotive force waveform obtained by the processor 121 is as follows: Figure 12 As shown in waveform 6, after the mutation point is identified, the slope of the electromotive force after the mutation is determined. When the slope exceeds a preset threshold, it is determined that the electronic atomizer is in a dry-burn state.

[0082] In one embodiment, Figure 13 As shown, the processing module 120 includes a processor 121 and a switch unit 122, the first end of the processor 121 is connected to the power module 110, the second end of the processor 121 is connected to the enable end of the switch unit 122, the first end of the switch unit 122 is connected to the power module 110, and the second end is connected to the heating element 140; the processor 121 is used to generate a pulse signal to control the switch unit 122 to be turned on or off.

[0083] In this embodiment, the processor 121 is used to generate a pulse signal, which is used to control the switch unit 122 to be turned on or off. When the switch unit 122 is turned on, the energy output by the power module 110 can be provided to the heating element 140 through the switch unit 122. When the switch unit 122 is turned off, the energy output by the power module 110 cannot be provided to the heating element 140 through the switch unit 122. In this way, when puffing, the processor 121 controls the switch unit 122 to be turned on, and when not puffing, the processor 121 controls the switch unit 122 to be turned off.

[0084] In one embodiment, Figure 14 As shown, the processing module 120 also includes a pulse unit 123. The first end of the processor 121 is connected to the power module 110, and the second end is connected to the enable end of the switch unit through the pulse unit. The first end of the switch is connected to the power module, and the second end is connected to the heating element 140. The processor 121 is used to control the pulse unit 123 to generate a pulse signal to control the switch unit 122 to be turned on or off.

[0085] This embodiment is relatively Figure 10 The embodiment shown is different in that a pulse unit 123 is used to generate a pulse signal, thereby reducing the workload of the processor 121 and using a processor with lower price and processing performance, thereby saving costs.

[0086] In one embodiment, the switch unit 122 includes a MOS transistor, which may be a P-channel MOS transistor or an N-channel MOS transistor.

[0087] Specifically, if Figure 15As shown, the switch unit 122 includes a PMOS transistor 1221 and a third resistor 1222; the gate of the PMOS transistor 1221 is connected to the pulse unit 123, the source is connected to the power module 110, and the drain is connected to the heating element 140. The third resistor 1222 is connected between the pulse unit 123 and the power module 110. It is understandable that the switch unit 122 can also include only the PMOS transistor 1221, that is, the third resistor 1222 is removed. In this case, the waveform of the corresponding back electromotive force is as follows Figure 12 As shown, the explanation of each waveform can be found in the above description and will not be repeated here.

[0088] Or, as Figure 16 As shown, the switch unit 122 includes an NMOS transistor 1223 and a fourth resistor 1224; the gate of the NMOS transistor 1223 is connected to the pulse unit 123, the source is connected to the power module 110 through the heating element 140, the drain is grounded, and the fourth resistor 1224 is connected between the pulse unit 123 and the ground. It is understandable that the switch unit 122 can also include only the NMOS transistor 1223, that is, the fourth resistor 1224 is removed. In this case, the waveform of the corresponding back electromotive force is as follows Figure 10 shown.

[0089] It is understandable that Figure 15 and Figure 16 This is just an example, and those skilled in the art can make appropriate modifications to it. For example, Figure 15 The positions of the heating element 140 and the switch unit 122 are interchanged; Figure 16 The positions of the heating element 140 and the switch unit 122 are interchanged, etc.

[0090] Based on the same inventive concept, the present application also provides a method for identifying the dry-burn state of the electronic atomizer mentioned above. The solution provided by this method is similar to the solution described in the electronic atomizer. Therefore, the specific limitations of one or more dry-burn state identification method embodiments provided below can be found in the above-mentioned limitations on electronic atomizers and will not be repeated here.

[0091] In one embodiment, Figure 17 As shown, based on the above embodiment, the method includes:

[0092] Step 210, obtaining the back electromotive force of the heating element and identifying the back electromotive force;

[0093] Step 220 : When a sudden change in the back electromotive force is detected, it is determined that the electronic atomizer is in a dry-burning state.

[0094] Specifically, this embodiment can be used in any of the above-mentioned electronic atomizers, or in an electronic atomizer in which a soft magnetic core is arranged in the cavity of the heating element, which is not limited here. The back electromotive force of the heating element is obtained by the detection circuit, and then the processing module identifies the back electromotive force and draws a relationship diagram between the back electromotive force and time. For example, Figure 10 and Figure 12 shown.

[0095] Furthermore, the process of detecting sudden voltage changes by the processor may include:

[0096] Obtaining the slope of the electromotive force after the back electromotive force suddenly changes;

[0097] When the slope exceeds a preset threshold, it is determined that the electronic atomizer is in a dry-burning state.

[0098] Specifically, the first diode is used to isolate the circuit so that the detection storage circuit portion can only pass a potential exceeding the supply voltage, or the first diode 1311 is used to isolate the detection circuit 130 so that the detection storage unit 131 can only pass a negative voltage. At the same time, the detection storage unit 131 includes a capacitor 1312, which has the characteristics of fast charging and slow discharging. The back electromotive force waveform obtained by the processor is as follows: Figure 10 Medium waveform 3 or Figure 12 As shown in waveform 6, after the mutation point is identified, the slope of the electromotive force after the mutation is determined. When the slope exceeds a preset threshold, it is determined that the electronic atomizer is in a dry-burn state.

[0099] The above-mentioned method for identifying the dry-burning state can determine whether the temperature inside the heated electronic atomizer exceeds the Curie point temperature of the soft magnetic material by detecting whether the back electromotive force of the heating element changes suddenly, thereby determining whether the electronic atomizer has dry-burned, thereby improving the accuracy of the detection result.

[0100] It should be understood that, although the various steps in the flowcharts involved in the various embodiments described above are displayed in sequence according to the instructions of the arrows, these steps are not necessarily executed in sequence in the order indicated by the arrows. Unless otherwise specified herein, there is no strict order restriction on the execution of these steps, and these steps can be executed in other orders. Moreover, at least a portion of the steps in the flowcharts involved in the various embodiments described above can include multiple steps or multiple stages, and these steps or stages are not necessarily executed and completed at the same time, but can be executed at different times, and the execution order of these steps or stages is not necessarily to be carried out in sequence, but can be executed in turn or alternately with other steps or at least a portion of steps or stages in other steps.

[0101] Based on the same inventive concept, embodiments of the present application also provide a dry-fire status identification device for implementing the aforementioned dry-fire status identification method. The solution provided by this device is similar to the solution described in the aforementioned dry-fire status identification method. Therefore, the specific limitations of one or more dry-fire status identification device embodiments provided below can be found in the above-described limitations of the dry-fire status identification method and will not be further elaborated here.

[0102] In one embodiment, Figure 18 As shown, a dry-burning state identification device is provided, comprising:

[0103] an identification module 310 for obtaining a back electromotive force of the heating element and identifying the back electromotive force;

[0104] The determination module 320 is configured to determine that the electronic atomizer is in a dry-burning state when a sudden change in the back electromotive force is identified.

[0105] In one embodiment, the determination module 320 is further configured to:

[0106] Obtaining the slope of the electromotive force after the back electromotive force suddenly changes;

[0107] When the slope exceeds a preset threshold, it is determined that the electronic atomizer is in a dry-burning state.

[0108] Each module in the dry-boil status recognition device described above may be implemented in whole or in part through software, hardware, or a combination thereof. Each module may be embedded in or independent of a processor in a computer device in the form of hardware, or may be stored in a memory in the computer device in the form of software, so that the processor can call and execute the corresponding operations of each module.

[0109] 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 steps of any of the above-mentioned dry-burn state identification methods are implemented.

[0110] Those skilled in the art will appreciate that all or part of the processes in the above-mentioned embodiment methods can be implemented by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to memory, database or other media used in the embodiments provided in this application may 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 memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory may include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM). The database involved in the various embodiments provided herein may include at least one of a relational database and a non-relational database. Non-relational databases may include, but are not limited to, distributed databases based on blockchains. The processor involved in the various embodiments provided herein may be, but are not limited to, a general-purpose processor, a central processing unit, a graphics processing unit, a digital signal processor, a programmable logic unit, a data processing logic unit based on quantum computing, and the like.

[0111] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, 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, they should be considered to be within the scope of this specification.

[0112] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present application shall be determined by the appended claims.

Claims

1. An electronic atomizer, characterized in that: The electronic atomizer comprises: A processing module, a detection circuit, a heating element, and a magnetic core embedded in the heating element, wherein the magnetic core is made of a soft magnetic material; The detection circuit is used to detect the back electromotive force of the heating element; The processing module is configured to identify the back electromotive force, and when identifying a sudden change in the back electromotive force, obtain a slope of the electromotive force after the sudden change in the back electromotive force; and when the slope exceeds a preset threshold, determine that the electronic atomizer is in a dry-burning state; Wherein, identifying the back electromotive force includes: A mutation point in the back electromotive force versus time relationship diagram is identified. After the mutation point is identified, it is determined that the back electromotive force has a mutation. The mutation point is a point that violates a law of back electromotive force change corresponding to a pulse signal.

2. The electronic atomizer according to claim 1, characterized in that The detection circuit includes a sampling unit and a detection storage unit; The detection storage unit is used to obtain and store the back electromotive force of the heating element; the sampling unit is used to detect and release the back electromotive force stored in the detection storage unit.

3. The electronic atomizer according to claim 2, characterized in that: The detection storage unit includes: a first diode, a capacitor and a second diode, The anode of the first diode is connected to the heating element, one end of the capacitor is connected to the cathode of the first diode and the anode of the second diode respectively, and the other end of the capacitor is connected to the anode of the second diode respectively.

4. The electronic atomizer according to claim 3, characterized in that: The sampling unit includes a first resistor and a second resistor connected in series, wherein one end of the first resistor away from the second resistor is connected between the first diode and the capacitor, one end of the second resistor away from the first resistor is grounded, and the first resistor and the second resistor are connected to the processing module.

5. The electronic atomizer according to claim 1, characterized in that: The electronic atomizer further comprises: a power supply module, the power supply module being used to supply energy to the heating element; The processing module includes a processor and a switch unit, wherein a first end of the processor is connected to the power module, and a second end is connected to the enable end of the switch unit; a first end of the switch unit is connected to the power module, and a second end is connected to the heating element; The processor is used to generate a pulse signal to control the switch unit to be turned on or off.

6. The electronic atomizer according to claim 5, characterized in that The processing module further includes a pulse unit, and the second end of the processor is connected to the enable end of the switch unit through the pulse unit; The processor is used to control the pulse unit to generate a pulse signal to control the switch unit to be turned on or off.

7. The electronic atomizer according to claim 6, characterized in that The switch unit includes a PMOS tube and a third resistor; The gate of the PMOS tube is connected to the pulse unit, the source is connected to the power module, the drain is connected to the heating element, and the third resistor is connected between the pulse unit and the power module.

8. The electronic atomizer according to claim 6, characterized in that The switch unit includes an NMOS tube and a fourth resistor; The gate of the NMOS tube is connected to the pulse unit, the source is connected to the power module through the heating element, the drain is grounded, and the fourth resistor is connected between the pulse unit and the ground.

9. A method for identifying a dry burning state, characterized in that: The method comprises: Obtaining a back electromotive force of the heating element and identifying the back electromotive force; When a sudden change in the back electromotive force is identified, a slope of the electromotive force after the sudden change in the back electromotive force is obtained; when the slope exceeds a preset threshold, it is determined that the electronic atomizer is in a dry-burning state; Wherein, identifying the back electromotive force includes: A mutation point in the back electromotive force versus time relationship diagram is identified. After the mutation point is identified, it is determined that the back electromotive force has a mutation. The mutation point is a point that violates a law of back electromotive force change corresponding to a pulse signal.

10. A dry burning state identification device, characterized in that: The device comprises: an identification module, configured to obtain a back electromotive force of the heating element and identify the back electromotive force; a determination module, configured to, when identifying a sudden change in the back electromotive force, obtain a slope of the electromotive force after the sudden change in the back electromotive force; and determine that the electronic atomizer is in a dry-burning state when the slope exceeds a preset threshold; Wherein, identifying the back electromotive force includes: A mutation point in the back electromotive force versus time relationship diagram is identified. After the mutation point is identified, it is determined that the back electromotive force has a mutation. The mutation point is a point that violates a law of back electromotive force change corresponding to a pulse signal.

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