WO2022089433A1 - 气溶胶生成装置 - Google Patents

气溶胶生成装置 Download PDF

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Publication number
WO2022089433A1
WO2022089433A1 PCT/CN2021/126447 CN2021126447W WO2022089433A1 WO 2022089433 A1 WO2022089433 A1 WO 2022089433A1 CN 2021126447 W CN2021126447 W CN 2021126447W WO 2022089433 A1 WO2022089433 A1 WO 2022089433A1
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WO
WIPO (PCT)
Prior art keywords
heating element
resistance value
preset
change rate
liquid
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2021/126447
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English (en)
French (fr)
Inventor
陈汉良
张小明
王宽
徐中立
李永海
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shenzhen FirstUnion Technology Co Ltd
Original Assignee
Shenzhen FirstUnion Technology Co Ltd
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Filing date
Publication date
Application filed by Shenzhen FirstUnion Technology Co Ltd filed Critical Shenzhen FirstUnion Technology Co Ltd
Priority to EP21885160.8A priority Critical patent/EP4238433A4/en
Priority to US18/034,358 priority patent/US20240023627A1/en
Publication of WO2022089433A1 publication Critical patent/WO2022089433A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24F—SMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES
    • A24F40/00—Electrically operated smoking devices; Component parts thereof; Manufacture thereof; Maintenance or testing thereof; Charging means specially adapted therefor
    • A24F40/50—Control or monitoring
    • A24F40/53—Monitoring, e.g. fault detection
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24F—SMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES
    • A24F40/00—Electrically operated smoking devices; Component parts thereof; Manufacture thereof; Maintenance or testing thereof; Charging means specially adapted therefor
    • A24F40/40—Constructional details, e.g. connection of cartridges and battery parts
    • A24F40/46—Shape or structure of electric heating means
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24F—SMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES
    • A24F40/00—Electrically operated smoking devices; Component parts thereof; Manufacture thereof; Maintenance or testing thereof; Charging means specially adapted therefor
    • A24F40/10—Devices using liquid inhalable precursors
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24F—SMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES
    • A24F40/00—Electrically operated smoking devices; Component parts thereof; Manufacture thereof; Maintenance or testing thereof; Charging means specially adapted therefor
    • A24F40/40—Constructional details, e.g. connection of cartridges and battery parts
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24F—SMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES
    • A24F40/00—Electrically operated smoking devices; Component parts thereof; Manufacture thereof; Maintenance or testing thereof; Charging means specially adapted therefor
    • A24F40/40—Constructional details, e.g. connection of cartridges and battery parts
    • A24F40/42—Cartridges or containers for inhalable precursors
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24F—SMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES
    • A24F40/00—Electrically operated smoking devices; Component parts thereof; Manufacture thereof; Maintenance or testing thereof; Charging means specially adapted therefor
    • A24F40/50—Control or monitoring
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24F—SMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES
    • A24F40/00—Electrically operated smoking devices; Component parts thereof; Manufacture thereof; Maintenance or testing thereof; Charging means specially adapted therefor
    • A24F40/50—Control or monitoring
    • A24F40/57—Temperature control
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
    • G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
    • G01F23/24—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of resistance of resistors due to contact with conductor fluid
    • G01F23/241—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of resistance of resistors due to contact with conductor fluid for discrete levels

Definitions

  • the present application relates to the technical field of smoking articles, and in particular, to an aerosol generating device.
  • One type of aerosol generating device is to generate smoke for users to inhale by heating e-liquid. It generally has two parts: an atomizer and a battery assembly.
  • the inside of the atomizer stores e-liquid and an atomizer for heating e-liquid is provided.
  • the core, the battery assembly can supply power to the atomizing core to generate heat and generate high temperature to heat the e-liquid.
  • the patent document with the application publication number CN103338665A discloses an electrically operated aerosol generating system, during the period of 0 seconds to 0.2 seconds of each pumping action, since the slope of the heater temperature curve increases as the liquid storage portion becomes empty. Therefore, the linearity of the temperature rise rate in the "empty" region between the X1 and X2 puffs can be used to measure the amount of aerosol-forming matrix remaining in the liquid storage section, which in turn allows for faster judgment of temperature level changes And can help reduce the risk of poor aerosol properties.
  • the present application provides an aerosol generating device to solve the problem of how to accurately identify the lack of liquid of the aerosol generating device at an appropriate time during the pumping when the aerosol generating device is pumped.
  • an aerosol generating device comprising:
  • a liquid storage unit for storing liquids capable of generating aerosols
  • a heating element for heating the liquid
  • a liquid transfer unit for transferring the liquid stored in the liquid storage unit to the heating element
  • a power source for providing power to the heating element
  • the circuit is configured to determine the storage in the liquid storage unit when the resistance change rate of the heating element decreases to a preset time point corresponding to the first resistance change rate during the heating period of the heating element whether the liquid has been reduced to the threshold.
  • the above circuit determines whether the liquid stored in the liquid storage unit has been reduced to a threshold value according to the comparison result between the resistance change rate of the heating element and the preset resistance change rate .
  • the above-mentioned preset time point may be predetermined according to the aerosol generating device having the determined heater, for example, the preset time point is after the heating element starts to continue heating for 600ms; preferably , the preset time point is after the heating element starts to continue heating for 800ms; further preferably, the preset time point is after the heating element starts to continue heating for 1000ms.
  • the heating temperature rise curve or resistance change curve of the heater can be obtained by prior testing, so as to calculate the resistance change rate according to the curve, and when the resistance of the heater changes
  • the resistance rate decreases to a certain value for example, the first resistance change rate is 1% to 30% of the resistance change rate at the beginning of heating
  • the corresponding preset time point can be determined. It can be understood that, the above-mentioned preset time point can also be determined by monitoring the resistance change rate of the heater in real time during heating until it decreases to a certain value.
  • an aerosol generating device comprising:
  • a liquid storage unit for storing liquids capable of generating aerosols
  • a heating element for heating the liquid
  • a liquid transfer unit for transferring the liquid contained in the liquid storage unit to the heating element
  • a power source for providing power to the heating element
  • the circuit is configured to compare the real-time resistance value of the heating element by comparing the real-time resistance value of the heating element during the period when the heating element initially starts heating until the rate of change of the resistance value of the heating element decreases to the preset time point corresponding to the first rate of change of resistance value Determine whether the liquid stored in the liquid storage unit has been reduced to the threshold value with the preset maximum threshold value; or judge by comparing the difference between the real-time resistance value and the initial resistance value of the heating element and the preset difference value whether the liquid stored in the liquid storage unit has decreased to a threshold;
  • it is configured to judge whether the liquid stored in the liquid storage unit has been reduced to a threshold value by comparing the resistance change rate of the heating element with the preset resistance change rate during the heating period after the preset time point .
  • the resistance change rate of the element to be heated is reduced to the first resistance change rate, it can be more advantageously and more accurately judged whether the liquid supplied to the heating element is missing, that is, whether the supplied liquid is Reduce to the threshold value, avoid the generation of unwanted harmful gas and burnt smell, prevent damage to the user's health, and improve the user's smoking experience.
  • FIG. 1 is a schematic diagram of an aerosol generating device provided in an embodiment of the present application.
  • FIG. 2 is a schematic diagram of a resistance detection circuit in the aerosol generating device provided by the embodiment of the present application;
  • FIG. 3 is a schematic diagram of another resistance value detection circuit in the aerosol generating device provided by the embodiment of the present application.
  • FIG. 4 is a schematic diagram of the control process of the aerosol generating device provided by the embodiment of the present application.
  • FIG. 5 is a schematic diagram of a curve of a control process of an aerosol generating device provided in an embodiment of the present application
  • FIG. 6 is another schematic diagram of a curve of the control process of the aerosol generating device provided by the embodiment of the present application.
  • FIG. 7 is another schematic diagram of a curve of the control process of the aerosol generating device provided by the embodiment of the present application.
  • FIG. 1 is a schematic diagram of an aerosol generating device provided in an embodiment of the present application.
  • the aerosol generating device includes a suction nozzle 11 , a liquid storage unit 12 , a liquid transfer unit 13 , a heating element 14 , an electrical circuit 15 , a power source 16 and a sensor 17 .
  • the suction nozzle 11 is used for the user to suck the heated aerosol.
  • the liquid storage unit 12 is used to store liquid capable of generating aerosols.
  • the liquid may be a liquid including tobacco-containing material containing volatile tobacco flavor components, or a liquid including non-tobacco material.
  • liquids may include water, solvents, ethanol, plant extracts, fragrances, fragrances, or vitamin mixtures.
  • the fragrance may include, but not limited to, menthol, peppermint, spearmint oil, various fruit fragrance ingredients, and the like.
  • Flavoring agents may include ingredients capable of providing a variety of aromas or flavors to the user.
  • the vitamin mixture may be a substance in which at least one of vitamin A, vitamin B, vitamin C, and vitamin E is mixed, but is not limited thereto.
  • liquids may include aerosol formers such as glycerol and propylene glycol.
  • the liquid transfer unit 13 is capable of transferring the liquid stored in the liquid storage unit 12 to the heating element 14 .
  • the liquid transfer unit 13 may be, but not limited to, cotton fibers, ceramic fibers, glass fibers, and the like.
  • the heating element 14 is a component for heating the liquid delivered by the liquid delivery unit 13 .
  • the heating element 14 may be a wire, a metal plate, a ceramic heater, etc., but is not limited thereto.
  • the heating element 14 may be constituted by a conductive heating wire such as a nichrome wire, and may be provided in a structure wound around the liquid transfer unit 13.
  • the heating element 14 may be heated by a current supply and transfer heat to the liquid in contact with the heating element 14 to heat the liquid, thereby generating an aerosol.
  • the heating element 14 is made of a material having a temperature coefficient of resistance characteristic, such as stainless steel 316, titanium, nickel, nichrome, and the like.
  • Circuit 15 may control the overall operation of the aerosol generating device. In detail, the circuit 15 controls not only the operation of the power supply 16 and the heating element 14, but also the operation of other elements in the aerosol generating device. Additionally, the circuit 15 may determine whether the aerosol-generating device is operational by checking the status of the aerosol-generating device components.
  • Circuit 15 includes at least one processor.
  • a processor may include an array of logic gates, or may include a combination of a general-purpose microprocessor and a memory that stores programs executable in the microprocessor. Furthermore, those skilled in the art will understand that the circuit 15 may comprise another type of hardware.
  • Power supply 16 provides power for operating the aerosol generating device.
  • the power supply 16 may provide power to heat the heating element 14 and may provide the power required to operate the circuit 15 . Additionally, the power supply 16 may provide the power required to operate the sensors, motors, etc. provided in the aerosol generating device.
  • the power source 16 may be, but is not limited to, a lithium iron phosphate (LiFePO4) battery.
  • the power source 16 may be a lithium cobalt oxide (LiCoO2) battery or a lithium titanate battery.
  • the power source 16 may be a rechargeable battery or a disposable battery.
  • the sensor 17 is used to detect the user's pumping action and generate a corresponding electrical signal, so that the circuit 15 controls the operation of the power supply 16, the heating element 14, etc. according to the electrical signal.
  • the sensor 17 can be a common pressure sensor, differential pressure sensor, airflow sensor and the like.
  • the aerosol generating device is provided with an air intake hole at a position adjacent to the sensor 17.
  • the airflow enters through the air intake hole, and flows through the sensor 17, the power supply 16, the circuit 15, the heating element 14, etc., Outflow is through the suction nozzle 11, and the dashed arrow in the figure roughly shows the air flow path.
  • FIG. 1 only shows components related to this embodiment. Those of ordinary skill in the art should understand that the aerosol generating device may also include other general components other than the components shown in FIG. 1 .
  • FIG. 2 is a schematic diagram of a resistance detection circuit provided by an embodiment of the present application.
  • Ri is the heating element 14
  • R1 is the sampling resistor
  • the heating element 14 and the sampling resistor R1 are connected in series between the power supply 16 (shown as VBAT in the figure) and the push-pull output port IO of the processor.
  • the first voltage sampling port ADC1 of the processor is connected to one end of the sampling resistor R1
  • the second voltage sampling port ADC2 of the processor is connected to the other end of the sampling resistor R1.
  • the switch tube connected in series with the sampling resistor R1 and its associated resistance are omitted.
  • the push-pull output port IO outputs a low level, and then the processor obtains the voltage V ADC1 through the first voltage sampling port ADC1 , obtains the voltage V ADC2 through the second voltage sampling port ADC2 , and then passes
  • the resistance value of the heating element 14 can be obtained by the following formula:
  • FIG. 3 is a schematic diagram of another resistance detection circuit provided by an embodiment of the present application.
  • the circuit 15 includes a switch tube Q8 connected in series between the positive pole and the negative pole of the power supply 16 (shown in the figure VBAT), the heating element 14 (connected to the D+ and D- terminals in the figure), The sampling resistor R4, U1 is the sensor 17.
  • the control end of the switch tube Q8 is connected to the control port OUT_CTR of the processor, and the switch tube Q8 can be controlled to be turned on or off through the control port OUT_CTR.
  • the first voltage sampling port AT-DET of the processor is set between the switch tube Q8 and the heating element 14, and the second voltage sampling port OUT1-ADC of the processor is set between the heating element 14 and the sampling resistor R4.
  • the switch tube and its associated resistance (large resistance value) connected in series with the sampling resistor R1 are also omitted, and the main circuit is used to detect the resistance value.
  • the processor controls the switch Q8 to be turned on through the control port OUT_CTR, and then the processor obtains the voltage V AT-DET through the first voltage sampling port AT-DET, and the second voltage sampling port through the second voltage sampling port.
  • OUT1-ADC obtains the voltage V OUT1-ADC
  • the resistance value of the heating element 14 can be obtained by the following formula:
  • the circuit 15 is configured to be after the resistance change rate of the heating element 14 decreases to a preset time point corresponding to the first resistance change rate during the heating period of the heating element 14 , to determine whether the liquid stored in the liquid storage unit has been reduced to a threshold value.
  • the value of the first resistance value change rate here is often small, and is smaller than the resistance value change rate of the heating element in the heating period just started.
  • the above-mentioned preset time point is corresponding to the decrease of the resistance value change rate of the heating element 14 from the second resistance value change rate of the heating element 14 when the heating is just started to the first resistance value change rate
  • the first resistance value change rate is 1% to 30% of the second resistance value change rate.
  • the above-mentioned second resistance change rate can be considered as the resistance change rate of the heating element 14 in a short period of time when the heating element 14 is initially started, and the resistance change rate during this period of time is often relatively large.
  • the judgment can be made after the resistance change rate of the heating element is reduced to 5% to 30% of the second resistance change rate; further preferably, the resistance change rate of the heating element can be reduced to the second resistance change rate.
  • the judgment is made after 5% to 25% of the second resistance change rate; more preferably, the judgment can be made after the resistance change rate of the heating element is reduced to 5% to 20% of the second resistance change rate; more preferably, the heating element can be judged after The judgment is made after the resistance change rate of the second resistance value is reduced to 10% to 20% of the second resistance value change rate.
  • the preset time point is after the heating element starts to continue heating for 600ms (including 600ms); preferably, the preset time point is after the heating element starts to continue heating for 800ms (including 800ms); further preferred , the preset time point is after the heating element starts to continue heating for 1000ms (including 1000ms).
  • the circuit 15 is configured to determine whether the liquid stored in the liquid storage unit 12 has been reduced to a threshold value according to the resistance change rate of the heating element 14 and the predetermined resistance change rate.
  • the circuit 15 is also configured to control the power supply in this situation. Power output to heating element 14 is stopped.
  • the circuit 15 is configured to determine whether the liquid stored in the liquid storage unit 12 is reduced to a threshold value according to the number of times that the resistance change rate of the heating element 14 continuously exceeds the preset resistance change rate.
  • the circuit 15 is also configured to control the power supply to stop outputting power to the heating element 14 .
  • the circuit 15 is configured to store the real-time resistance value of the heating element 14 through a preset buffer, and calculate the resistance change rate of the heating element 14:
  • K j (R N+j -R 0+j )/R 0+j , where K j is the resistance change rate of the heating element 14 , N is the length of the preset buffer zone, and j is a natural number.
  • the circuit 15 is configured to determine whether the liquid stored in the liquid storage unit 12 is reduced to the threshold value according to the real-time resistance value of the heating element 14 and the over-temperature threshold value.
  • circuit 15 is configured as,
  • the power output to the heating element 14 is reduced, so as to maintain the temperature of the heating element 14 at the preset temperature, or maintain the real-time resistance value of the heating element 14 corresponding to the preset temperature resistance value;
  • the temperature of the heating element 14 has not been successfully maintained at the preset temperature, or the real-time resistance value of the heating element 14 has not been successfully maintained at the resistance value corresponding to the preset temperature, Then, it is determined that the liquid stored in the liquid storage unit 12 has been reduced to the threshold value.
  • the over-temperature threshold is a resistance value corresponding to the maximum atomization temperature that the aerosol generating device can accept during suction, and the over-temperature threshold can be a default threshold or a dynamic threshold, which is determined according to different materials of the heating element 14 .
  • the preset temperature is the atomization temperature that the aerosol generating device expects to maintain during suction, so as to achieve the best atomization effect.
  • the temperature of the heating element 14 has not been successfully maintained at the preset temperature, or the real-time resistance value of the heating element 14 has not been successfully maintained as a resistance value corresponding to the preset temperature, it means that the power output to the heating element 14 is reduced to the preset power.
  • the real-time resistance or temperature of the heating element 14 continues to rise; specifically, the real-time resistance of the heating element 14 exceeds the resistance value corresponding to the preset temperature, or the temperature of the heating element 14 exceeds the preset temperature. set temperature.
  • the temperature of the heating element 14 is generally too high due to continuous suction. Even if the liquid supply is normal, the temperature of the heating element 14 cannot be successfully maintained at the preset temperature, or the real-time resistance of the heating element 14 has not been successfully maintained. The situation occurs when the value is the resistance value corresponding to the preset temperature.
  • the circuit 15 is configured to,
  • the number of times the difference continuously exceeds the preset difference value is greater than the second preset number of times, so the identification is performed by setting N different values.
  • the N preset differences are empirical values or test values, for example, obtained by integrating the test data through a large number of tests.
  • N is a positive integer, generally, N is 8-16, preferably 8-14, more preferably 8-12.
  • the detection interval of the N real-time resistance values ranges from 40ms to 100ms, preferably 40ms to 80ms.
  • the circuit 15 is configured to,
  • the liquid storage unit 12 if the liquid storage unit 12 has no liquid or the liquid content is very low, it can also be determined whether the liquid stored in the liquid storage unit 12 has decreased by comparing the real-time resistance value of the heating element 14 with a preset maximum threshold value. down to the threshold.
  • the preset maximum threshold is greater than the above-mentioned over-temperature threshold.
  • the power output to the heating element 14 is stopped. Avoid unwanted harmful gas and burnt smell, prevent damage to the user's health, and improve the user's smoking experience.
  • FIG. 4 is a schematic diagram of the control process of the aerosol generating device provided by the embodiment of the present application.
  • the control process is described by taking a specific case as an example, and specifically includes:
  • Step S21 the aerosol generating device is started
  • Step S22 obtaining the initial resistance value and 10 real-time resistance values of the heating element 14; for example: the initial resistance value R0, the real-time resistance values R1-R10;
  • Step S23 calculate the difference between each real-time resistance value and the initial resistance value; for example: R1-R0 (denoted as D1), R2-R0 (denoted as D2)...R10-R0 (denoted as D10), and then obtain 10 difference;
  • Step S24 compare the 10 differences with the 10 preset differences in a one-to-one correspondence; assuming that the 10 preset differences are d1, d2...d10 respectively, then compare the sizes of D1 and d1, and the sizes of D2 and d2 ... the size of D10 and d10;
  • Step S25 judging whether the number of times that the difference continuously exceeds the preset difference exceeds 4 times;
  • Step S26 if the number of times that the difference continuously exceeds the preset difference exceeds 4 times, stop the power output to the heating element 14 (step S32); otherwise, obtain the real-time data of the heating element 14 again after 800ms after the aerosol generating device is started. resistance;
  • Step S27 calculating the resistance change rate of the heating element 14 according to the real-time resistance value of the heating element 14 obtained again;
  • Step S28 judging whether the number of times the resistance change rate continuously exceeds the preset resistance change rate exceeds 4 times; if the number of times that the resistance change rate continuously exceeds the preset resistance change rate exceeds 4 times, stop the output to the heating element 14. power (step S32); otherwise, continue to compare and judge;
  • Step S29 according to the real-time resistance value of the heating element 14 obtained again, determine whether the real-time resistance value of the heating element 14 exceeds the over-temperature threshold;
  • Step S30 if the real-time resistance value of the heating element 14 exceeds the over-temperature threshold, reduce the power output of the heating element 14; otherwise, continue to compare and judge;
  • Step S31 judging whether the preset temperature is successfully maintained; if the preset temperature is not maintained successfully, the power output of the heating element 14 is reduced; otherwise, the comparison and judgment are continued.
  • steps S26-S32 can be implemented after the aerosol generating device is started up, and it is also feasible that steps S22-S25 can be implemented after the aerosol generating device is restarted.
  • the curve K1 is the curve when the heating element 14 is dry-burned after the aerosol generating device is activated and before being sucked (for example, shown by A in the figure), and the curve K2 is the heating element 14 in the aerosol A curve was generated when no dry-burn occurred after the device was started and before being pumped.
  • the ordinate in the figure is the resistance value (milliohm) of the heating element 14, and the abscissa is the number of times of resistance detection. It should be noted that, for the convenience of description, the change curves between the curves K1 to K2 are not shown, and can be understood with reference to the curves K1 and K2.
  • the difference between each real-time resistance value and the initial resistance value is calculated, and the 10 difference values correspond to the 10 preset differences one-to-one. Then, it is determined whether the number of times the difference value exceeds the preset difference value continuously exceeds 4 times, and then it can be identified whether the heating element 14 has dry burning.
  • the slope method or the resistance change rate method cannot accurately determine whether the amount of the liquid storage part has been reduced to the threshold value, which is easy to cause. Misjudgment occurs, which affects the user's smoking experience. In this example, the occurrence of misjudgment is reduced or avoided by comparing multiple differences one-to-one.
  • the curve K3 is the curve of the heating element 14 when the aerosol generating device is sucked and dry-burning occurs
  • the curve K4 is the curve of the heating element 14 when the aerosol-generating device is sucked and the dry-burning does not occur. (Dry burning occurred after the aerosol generating device was activated and before being puffed).
  • the above judgment method described with respect to FIG. 6 is not suitable for the entire suction stage, such as the situation shown in FIG. 5 . Since the resistance data fluctuates greatly after the heating element 14 starts heating to a certain time point (for example, the time point T1 in the figure), the above judgment method can easily lead to misjudgment, thereby affecting the user's suction experience.
  • the curve K5 is the curve of the heating element 14 when the aerosol generating device is sucked and dry-burning occurs
  • the curve K6 is the curve of the heating element 14 when the aerosol-generating device is sucked and the dry-burning does not occur.
  • the real-time resistance value of the heating element 14 can be obtained again, and the real-time resistance value of the heating element 14 can be compared with the over-temperature threshold value. If the real-time resistance value of the heating element 14 exceeds the over-temperature threshold value, the output is reduced to heating The power of the element 14; when the temperature of the heating element 14 is successfully maintained at the preset temperature, it can be determined that the heating element 14 does not dry-burn when the aerosol generating device is sucked. As shown in D in the figure, when the real-time resistance value of the heating element 14 at this node exceeds the over-temperature threshold, after reducing the power output to the heating element 14, the temperature of the heating element 14 is successfully maintained at the preset temperature.

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  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Control Of Resistance Heating (AREA)

Abstract

一种气溶胶生成装置，包括：液体存储单元（12），用于存储能够生成气溶胶的液体；加热元件（14），用于加热液体；液体传递单元（13），用于将液体存储单元（12）存储的液体传递到加热元件（14）；电源（16），用于为加热元件（14）提供电力；电路（15），被配置为在加热元件（14）启动加热期间的一个特定的预设时间点之后，来判断液体存储单元（12）存储的液体是否已减小至阈值；其中，预设时间点是根据在加热过程中加热元件（14）的阻值变化率降低至第一阻值变化率的时刻确定的，例如第一阻值变化率为初始启动加热时加热元件（14）的阻值变化率的1％～30％。在加热元件（14）的阻值变化率降低至第一阻值变化率之后，能够针对每次抽吸的后半段时间是否发生干烧进行精确地判断，避免不期望的有害气体和焦味产生，防止损害用户的健康，提升了用户的抽吸体验。

Description

气溶胶生成装置
相关申请的交叉参考
本申请要求于2020年10月27日提交中国专利局，申请号为202011160206.2，发明名称为“气溶胶生成装置”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及烟具技术领域，尤其涉及一种气溶胶生成装置。
背景技术
一种类型的气溶胶生成装置是通过加热烟油产生烟雾供用户吸食，其一般具有雾化器和电池组件两个部分，雾化器内部存储有烟油以及设置有用于加热烟油的雾化芯，电池组件可以给雾化芯供电使其发热产生高温进而对烟油进行加热。
申请公布号为CN103338665A的专利文献公开了一种电操作的浮质产生系统，在每次抽吸动作的0秒至0.2秒期间，由于加热器温度曲线的斜率随着液体贮存部分变空而增大，因此可利用X1和X2抽吸之间的“变空”区域中的温升率的线性特性来测量液体贮存部分中剩余的浮质形成基质的数量，进而可以更快地判断温度水平变化并且可以有助于降低浮质特性变得较差的风险。
该方式存在的问题是，在每次抽吸动作的0秒至0.2秒之间为加热器温度急剧上升期间，该期间的持续时间非常短且温度数据波动大；因此，在该期间内采用监控加热器的温度曲线的斜率的方法是无法准确地判断出液体贮存部分的量是否已经减小至阈值。
发明内容
本申请提供一种气溶胶生成装置，以解决在气溶胶生成装置被抽吸时，在抽吸期间如何准确地在合适时机对气溶胶生成装置的液体缺失进行识别的问题。
为了解决以上问题，本申请提供一种气溶胶生成装置，包括：
液体存储单元，用于存储能够生成气溶胶的液体；
加热元件，用于加热所述液体；
液体传递单元，用于将存储于所述液体存储单元中的液体传递到所述加热元件；
电源，用于为所述加热元件提供电力；
电路，被配置为在所述加热元件启动加热期间当所述加热元件的阻值变化率降低至第一阻值变化率所对应的预设时间点之后，来判断存储于所述液体存储单元中的液体是否已减小至阈值。
作为一种具体实施，上述电路是根据所述加热元件的阻值变化率与预设阻值变化率的大小的比较结果，来判断存储在所述液体存储单元中的液体是否已减小至阈值。作为可选的示例，上述预设时间点可以是根据具有已确定的加热器的气溶胶生成装置事先预先确定的，例如所述预设时间点在所述加热元件启动持续加热600ms之后；优选的，所述预设时间点在所述加热元件启动持续加热800ms之后；进一步优选的，所述预设时间点在所述加热元件启动持续加热1000ms之后。对于已确定的加热器，在液体供应充足的情况下，可以通过事先测试来获取该加热器的加热温升曲线或者电阻变化曲线，从而根据该曲线计算电阻变化率，且当加热器的电阻变化率降低到某一特定值(例如第一阻值变化率是加热起始的阻值变化率的1％～30％)时，即可确定对应的预设时间点。可以理解的是，上述预设时间点也可以通过在加热期间实时监控加热器的电 阻变化率，直至降低至某一特定值的时刻来确定。
另一方面，本申请提供一种气溶胶生成装置，包括：
液体存储单元，用于存储能够生成气溶胶的液体；
加热元件，用于加热所述液体；
液体传递单元，用于将容纳于所述液体存储单元中的液体传递到所述加热元件；
电源，用于为所述加热元件提供电力；
电路，被配置为在所述加热元件初始启动加热持续至所述加热元件的阻值变化率降低至第一阻值变化率所对应的预设时间点的期间，通过比较加热元件的实时阻值与预设的最大阈值来判断存储于所述液体存储单元中的液体是否已减小至阈值；或者通过比较加热元件的实时阻值和初始阻值之间的差值与预设差值来判断存储于所述液体存储单元中的液体是否已减小至阈值；
同时被配置为在所述预设时间点之后的加热期间，通过比较加热元件的阻值变化率与预设阻值变化率来判断存储于所述液体存储单元中的液体是否已减小至阈值。
由于气溶胶生成装置发生液体缺失的时刻大概率都是处在每次抽吸期间(即加热元件的持续加热期间)的后半段时间内，而且加热元件的阻值变化率在加热期间是逐步降低的，因此在待加热元件的阻值变化率降低至第一阻值变化率之后，才能够更加有利地和更加精确地判断供应给加热元件的有液体是否存在缺失，即所供应的液体是否减少到阈值，避免不期望的有害气体和焦味产生，防止损害用户的健康，提升了用户的抽吸体验。
附图说明
本申请目的的实现、功能特点及优点将结合实施例，参照附图做进一步说明。一个或多个实施例通过与之对应的附图中的图片进行示例性说明，这些示例性说明并不构成对实施例的限定，附图中具有相同参考数字标号的元件表示为类似的元件，除非有特别申明，附图中的图不构成比例限制。
图1是本申请实施例提供的气溶胶生成装置示意图；
图2是本申请实施例提供的气溶胶生成装置中阻值检测电路示意图；
图3是本申请实施例提供的气溶胶生成装置中另一阻值检测电路示意图；
图4是本申请实施例提供的气溶胶生成装置控制过程示意图；
图5是本申请实施例提供的气溶胶生成装置控制过程的曲线示意图；
图6是本申请实施例提供的气溶胶生成装置控制过程的另一曲线示意图；
图7是本申请实施例提供的气溶胶生成装置控制过程的又一曲线示意图。
具体实施方式
应当理解，此处所描述的具体实施例仅仅用以解释本申请，并不用于限定本申请。为了便于理解本申请，下面结合附图和具体实施方式，对本申请进行更详细的说明。需要说明的是，当元件被表述“固定于”另一个元件，它可以直接在另一个元件上、或者其间可以存在一个或多个居中的元件。当一个元件被表述“连接”另一个元件，它可以是直接连接到另一个元件、或者其间可以存在一个或多个居中的元件。本说明 书所使用的术语“上”、“下”、“左”、“右”、“内”、“外”以及类似的表述只是为了说明的目的。
除非另有定义，本说明书所使用的所有的技术和科学术语与属于本申请的技术领域的技术人员通常理解的含义相同。本说明书中在本申请的说明书中所使用的术语只是为了描述具体的实施方式的目的，不是用于限制本申请。本说明书所使用的术语“和/或”包括一个或多个相关的所列项目的任意的和所有的组合。
图1是本申请实施例提供的气溶胶生成装置示意图。
如图1所示，气溶胶生成装置包括吸嘴11、液体存储单元12、液体传递单元13、加热元件14、电路15、电源16以及传感器17。
吸嘴11用于供用户吸食加热产生的气溶胶。
液体存储单元12用于存储能够生成气溶胶的液体。液态可以为包括含有挥发性烟草香味成分的含烟草物质的液体，还可以为包括非烟草物质的液体。例如，液体可包括水、溶剂、乙醇、植物萃取物、香料、香味剂或维生素混合物。香料可包括薄荷醇、欧薄荷、绿薄荷油、各种水果香成分等，但不限于此。香味剂可包括能够向使用者提供多种香味或风味的成分。维生素混合物可以为混合有维生素A、维生素B、维生素C及维生素E中至少一种的物质，但不限于此。另外，液体可包括如甘油及丙二醇的气溶胶形成剂。
液体传递单元13能够将液体存储单元12存储的液体传递到加热元件14。例如，液体传递单元13可以为如棉纤维、陶瓷纤维、玻璃纤维等等，但不限于此。
加热元件14是用于加热通过液体传递单元13传递的液体的部件。例如，加热元件14可以为金属线、金属板、陶瓷加热器等，但不限于此。另外，加热元件14可由如镍铬线的导电发热丝构成，可设置成缠 绕在液体传递单元13的结构。加热元件14可通过电流供给被加热，并向与加热元件14接触的液体传递热量以加热液体，进而生成气溶胶。在本示例中，加热元件14采用具有电阻温度系数特征的材料，例如：如不锈钢316、钛、镍、镍铬合金等。
电路15可以控制气溶胶生成装置的整体操作。详细地说，电路15不仅控制电源16和加热元件14的操作，而且还控制气溶胶生成装置中其它元件的操作。此外，电路15可以通过检查气溶胶生成装置部件的状态来确定气溶胶生成装置是否可以进行操作。
电路15包括至少一个处理器。处理器可以包括逻辑门阵列，或可以包括通用微处理器和存储微处理器中可执行的程序的存储器的组合。此外，本领域技术人员应理解，电路15可以包括另一类型的硬件。
电源16提供用于操作气溶胶生成装置的电力。例如，电源16可以提供电力以对加热元件14进行加热，并且可以提供操作电路15所需的电力。此外，电源16可以提供操作气溶胶生成装置中所提供的传感器、电机等所需的电力。
电源16可以是但不限于磷酸铁锂(LiFePO4)电池。例如，电源16可以是钴酸锂(LiCoO2)电池或钛酸锂电池。电源16可以是可反复充电电池或一次性电池。
传感器17用于检测用户的抽吸动作并生成对应的电信号，以使得电路15根据该电信号控制电源16、加热元件14等的操作。传感器17可以采用常见的压力传感器、压差传感器、气流传感器等等。
气溶胶生成装置邻近传感器17的位置处设置有进气孔，在气溶胶生成装置被抽吸时，气流通过进气孔进入，流经传感器17、电源16、电路15、加热元件14等后，通过吸嘴11流出，图中的虚线箭头大概地示出了该气流路径。
需要说明的是，图1仅示出与本实施例相关的部件。本技术领域的普通技术人员应理解，气溶胶生成装置还可包括除图1所示的部件以外的其他通用的部件。
图2是本申请实施例提供的一种阻值检测电路示意图。
如图2所示，Ri为加热元件14，R1为采样电阻，加热元件14与采样电阻R1串联连接在电源16(图中的VBAT所示)与处理器的推挽输出端口IO之间，处理器的第一电压采样端口ADC1连接在采样电阻R1的一端，处理器的第二电压采样端口ADC2连接在采样电阻R1的另一端。与现有技术对比，省略掉了与采样电阻R1串联连接的开关管及其关联电阻(阻值较大)。
在需要检测加热元件14的阻值时，推挽输出端口IO输出低电平，然后处理器通过第一电压采样端口ADC1得到电压V ADC1，通过第二电压采样端口ADC2得到电压V ADC2，接着通过以下公式即可得到加热元件14的阻值：
Ri＝(V BAT-V ADC2)×R1/(V ADC2-V ADC1)
图3是本申请实施例提供的另一种阻值检测电路示意图。
如图3所示，电路15包括依次串联连接在电源16(图中的VBAT所示)的正极与负极之间的开关管Q8、加热元件14(连接在图中的D+与D-端)、采样电阻R4，U1为传感器17。开关管Q8的控制端与处理器的控制端口OUT_CTR连接，通过该控制端口OUT_CTR可控制开关管Q8的导通或者断开。处理器的第一电压采样端口AT-DET设置在开关管Q8与加热元件14之间，处理器的第二电压采样端口OUT1-ADC设置在加热元件14与采样电阻R4之间。与现有技术对比，同样省略掉了与采样电阻R1串联连接的开关管及其关联电阻(阻值较大)，而是采用了主电路来实现阻值的检测。
具体地，当传感器17检测到抽吸时，处理器通过控制端口OUT_CTR控制开关管Q8导通，然后处理器通过第一电压采样端口AT-DET得到电压V AT-DET，通过第二电压采样端口OUT1-ADC得到电压V OUT1-ADC，接着通过以下公式即可得到加热元件14的阻值：
Ri＝V AT-DET×R4/V OUT1-ADC-R4
基于图2-图3的阻值检测电路，电路15被配置为在加热元件14启动加热期间内当加热元件14的阻值变化率降低至第一阻值变化率所对应的预设时间点之后，来判断存储于液体存储单元中的液体是否已减小至阈值。此处的第一阻值变化率的值往往较小，并且是小于加热元件在刚启动发热时间段内的阻值变化率。
其中作为优选示例，上述预设时间点是根据加热元件14的阻值变化率从所述加热元件14在刚启动加热时的第二阻值变化率降低至所述第一阻值变化率所对应的时刻来确定的，所述第一阻值变化率为第二阻值变化率的1％～30％。可以理解的是，上述第二阻值变化率可认为是加热元件14在初始启动时的一小段时间内的电阻变化率，在此时间段内的电阻变化率往往是较大的。
在该示例中，在加热元件的阻值变化率降低至第二阻值变化率的1％～30％之后，判断液体存储单元12存储的液体是否已减小至阈值，能够避免前期加热元件的温度(或者实时阻值)数据波动大而导致判断不准确的问题。优选的，可在加热元件的阻值变化率降低至第二阻值变化率的5％～30％之后进行判断；进一步优选的，可在加热元件的阻值变化率降低至第二阻值变化率的5％～25％之后进行判断；进一步优选的，可在加热元件的阻值变化率降低至第二阻值变化率的5％～20％之后进行判断；进一步优选的，可在加热元件的阻值变化率降低至第二阻值变化率的10％～20％之后进行判断。
在一示例中，所述预设时间点是在加热元件启动持续加热600ms之后(包括600ms)；优选的，所述预设时间点在加热元件启动持续加热800ms之后(包括800ms)；进一步优选的，所述预设时间点在加热元件启动持续加热1000ms之后(包括1000ms)。
在一示例中，电路15被配置为，根据加热元件14的阻值变化率与预设阻值变化率的大小，判断液体存储单元12存储的液体是否为已减小至阈值的情形。
具体地，若加热元件14的阻值变化率大于预设阻值变化率，则判断液体存储单元12存储的液体为已减小至阈值的情形，在该情形下电路15还被配置为控制电源停止输出功率至加热元件14。
进一步地，电路15被配置为，根据加热元件14的阻值变化率连续超过预设阻值变化率的次数，判断液体存储单元12存储的液体是否为已减小至阈值的情形。
具体地，若加热元件14的阻值变化率连续大于预设阻值变化率的次数超过第一预设次数时，则判断液体存储单元12存储的液体为已减小至阈值的情形，在该情形下电路15还被配置为控制电源停止输出功率至加热元件14。
在该示例中，电路15被配置为，通过预设缓冲区存储加热元件14的实时阻值，并计算加热元件14的阻值变化率：
K j＝(R N+j-R 0+j)/R 0+j，其中，K j为加热元件14的阻值变化率，N为预设缓冲区的长度，j为自然数。
例如：假设N＝5，当j＝0时，K 0＝(R 5-R 0)/R 0；当j＝1时，K 1＝(R 6-R 1)/R 1；当j＝2时，K 2＝(R 7-R 2)/R 2；当j＝3时，K 3＝(R 8-R 3)/R 3；依次类推。
在该示例中，一般是每次抽吸的前半段有液体，而其后半段就没有液体(例如：供液不足)，进而导致加热元件14的阻值变化率连续大于 预设阻值变化率的次数超过第一预设次数。
在一示例中，电路15被配置为，根据加热元件14的实时阻值与超温阈值的大小，判断液体存储单元12存储的液体是否为已减小至阈值的情形。
在该示例中，电路15被配置为，
若加热元件14的实时阻值超过超温阈值，则降低输出至加热元件14的电力，以期望维持加热元件14的温度为预设温度、或者维持加热元件14的实时阻值为预设温度对应的阻值；
若输出至加热元件14的电力降低至预设电力时，仍未成功维持加热元件14的温度为预设温度、或者仍未成功维持加热元件14的实时阻值为预设温度对应的阻值，则判断液体存储单元12存储的液体为已减小至阈值的情形。
其中，超温阈值为气溶胶生成装置在抽吸时能够接受的最大雾化温度的对应的阻值，超温阈值可以是默认的阈值或者动态的阈值，根据加热元件14的不同材质确定。预设温度为气溶胶生成装置在抽吸时期望能够保持的雾化温度，以达到最佳的雾化效果。
仍未成功维持加热元件14的温度为预设温度、或者仍未成功维持加热元件14的实时阻值为预设温度对应的阻值，指的是输出至加热元件14的电力降低至预设电力的期间内，加热元件14的实时阻值或者温度仍是继续攀升的；具体地来说，加热元件14的实时阻值是超过预设温度对应的阻值、或者加热元件14的温度是超过预设温度的。
在该示例中，一般是连续抽吸导致加热元件14温度过高，即使供液正常也会导致仍未成功维持加热元件14的温度为预设温度、或者仍未成功维持加热元件14的实时阻值为预设温度对应的阻值的情形发生。
在一示例中，电路15被配置为，
在预设时间点之前，获取加热元件14的初始阻值和M个实时阻值；
计算每一个实时阻值与所述初始阻值的差值；
将M个差值与M个预设差值一一对应的进行比较；
若差值连续超过预设差值的次数大于第二预设次数，则判断液体存储单元12的液体为已减小至阈值的情形。
在该示例中，一般是由于液体存储单元12没有液体或者液体含量非常少导致差值连续超过预设差值的次数大于第二预设次数，因此通过设置N个不同的数值来进行识别。N个预设差值为经验值或者测试值，例如：通过大量的测试，在测试数据中整合得到。N为正整数，一般的，N介于8～16，优选的为8～14，进一步优选的为8～12。N个实时阻值的检测间隔时间介于40ms～100ms，优选的为40ms～80ms。
在一示例中，电路15被配置为，
在预设时间点之前，获取所述加热元件的实时阻值；
将所述加热元件的实时阻值与预设的最大阈值进行比较；
若所述加热元件的实时阻值大于预设的最大阈值，则判断所述液体存储单元存储的液体为已减小至阈值的情形。
在该示例中，若液体存储单元12没有液体或者液体含量非常少，也可通过将加热元件14的实时阻值与预设的最大阈值进行比较，来确定液体存储单元12存储的液体是否已减小至阈值。一般的，预设的最大阈值大于上述超温阈值。
需要说明的是，在上述示例中，若液体存储单元12的液体为已减小至阈值的情形，则停止输出至加热元件14的电力。避免不期望的有害气体和焦味产生，防止损害用户的健康，提升了用户的抽吸体验。
图4是本申请实施例提供的气溶胶生成装置控制过程示意图。该控制过程结合具体地案例为例进行说明，具体地包括：
步骤S21、气溶胶生成装置启动；
步骤S22、获取加热元件14的初始阻值和10个实时阻值；例如：初始阻值R0，实时阻值R1～R10；
步骤S23、计算每一个实时阻值与初始阻值的差值；例如：R1-R0(记为D1)，R2-R0(记为D2)…R10-R0(记为D10)，进而得到10个差值；
步骤S24、将10个差值与10个预设差值一一对应的进行比较；假设10个预设差值分别为d1、d2…d10，则比较D1与d1的大小，D2与d2的大小…D10与d10的大小；
步骤S25、判断差值连续超过预设差值的次数是否超过4次；
步骤S26、若差值连续超过预设差值的次数超过4次，停止输出至加热元件14的电力(步骤S32)；否则，在气溶胶生成装置启动后的800ms之后再次获取加热元件14的实时阻值；
步骤S27、根据再次获取的加热元件14的实时阻值，计算加热元件14的阻值变化率；
步骤S28、判断阻值变化率连续超过预设阻值变化率的次数是否超过4次；若阻值变化率连续超过预设阻值变化率的次数超过4次，则停止输出至加热元件14的电力(步骤S32)；否则继续比较判断；
步骤S29、根据再次获取的加热元件14的实时阻值，判断加热元件14的实时阻值是否超过超温阈值；
步骤S30、若加热元件14的实时阻值超过超温阈值，则降低加热元件14的电力输出；否则继续比较判断；
步骤S31、判断是否成功维持为预设温度；若没有成功维持为预设温度，则降低加热元件14的电力输出；否则继续比较判断。
需要说明的是，上述控制过程中，在气溶胶生成装置启动之后，可 以只实施步骤S26～S32也是可行的，步骤S22～S25可以在气溶胶生成装置再次启动之后实施也是可行的。
如图5所示，曲线K1为加热元件14在气溶胶生成装置启动之后至被抽吸之前(例如，图中的A所示)发生干烧时的曲线，曲线K2为加热元件14在气溶胶生成装置启动之后至被抽吸之前没有发生干烧时的曲线。图中的纵坐标为加热元件14的阻值(毫欧)，横坐标为阻值检测次数。需要说明的是，为了便于说明，曲线K1～K2之间的变化曲线并没有示出，可参考曲线K1和曲线K2进行理解。
在前800ms内，通过获取加热元件14的初始阻值和10个实时阻值，计算每一个实时阻值与初始阻值的差值，将10个差值与10个预设差值一一对应的进行比较，判断差值连续超过预设差值的次数是否超过4次，即可对加热元件14是否发生干烧进行识别。
需要说明的是，在前800ms内，由于持续时间非常短且温度数据波动大，采用斜率方法或者阻值变化率方法并不能准确地判断出液体贮存部分的量是否已经减小至阈值，容易导致误判的情形发生，影响用户的抽吸体验。本示例通过多个差值一对一的进行比较，减少或者避免了误判情形的发生。
如图6所示，曲线K3为加热元件14在气溶胶生成装置被抽吸时发生干烧时的曲线，曲线K4为加热元件14在气溶胶生成装置被抽吸时没有发生干烧时的曲线(在气溶胶生成装置启动之后至被抽吸之前均为发生干烧)。
在800ms之后，通过再次获取加热元件14的实时阻值，计算加热元件14的阻值变化率，判断阻值变化率连续超过预设阻值变化率的次数是否超过4次，即可对加热元件14是否发生干烧进行识别。如图中的B所示，在该节点之后，曲线K3的斜率是明显上升的，进而可确定 加热元件14在气溶胶生成装置被抽吸时发生干烧。
需要说明的是，上述关于图6叙述的判断方法并不适合于整个抽吸阶段，例如图5所示的情形。由于在加热元件14启动加热之后至某个时间点(例如，图中的T1时间点)，该期间内的阻值数据波动大，采用上述判断方法很容易导致误判，进而影响用户的抽吸体验。时间点可根据加热元件14的阻值变化率降低至加热元件14在启动加热时的阻值变化率的1％～30％的时刻确定。以T1时间点为例进行说明，经过计算可确定曲线K3的阻值变化率降低至加热元件14在启动加热时的阻值变化率的1％的时刻为T1时刻，根据横坐标、采样起始时间以及采样间隔时间，可以推测出T1＝800ms。因此，在800ms之后采用上述判断方法可减少或者避免误判的情形发生。
如图7所示，曲线K5为加热元件14在气溶胶生成装置被抽吸时发生干烧时的曲线，曲线K6为加热元件14在气溶胶生成装置被抽吸时没有发生干烧时的曲线。
在800ms之后，还可通过再次获取加热元件14的实时阻值，将加热元件14的实时阻值与超温阈值进行比较，若加热元件14的实时阻值超过超温阈值，则降低输出至加热元件14的电力；在成功维持加热元件14的温度为预设温度时，可判断加热元件14在气溶胶生成装置被抽吸时没有发生干烧。如图中的D所示，在该节点加热元件14的实时阻值超过超温阈值，在降低输出至加热元件14的电力之后，成功维持加热元件14的温度为预设温度。
如图中的C所示，在该节点加热元件14的实时阻值超过超温阈值，在降低输出至加热元件14的电力之后，仍未成功维持加热元件14的温度为预设温度，加热元件14的阻值仍是呈上升趋势。因此可确定加热元件14在气溶胶生成装置被抽吸时发生干烧。
需要说明的是，本申请的说明书及其附图中给出了本申请的较佳的实施例，但是，本申请可以通过许多不同的形式来实现，并不限于本说明书所描述的实施例，这些实施例不作为对本申请内容的额外限制，提供这些实施例的目的是使对本申请的公开内容的理解更加透彻全面。并且，上述各技术特征继续相互组合，形成未在上面列举的各种实施例，均视为本申请说明书记载的范围；进一步地，对本领域普通技术人员来说，可以根据上述说明加以改进或变换，而所有这些改进和变换都应属于本申请所附权利要求的保护范围。

Claims (13)

  1. 一种气溶胶生成装置，其特征在于，包括：
    液体存储单元，用于存储能够生成气溶胶的液体；
    加热元件，用于加热所述液体；
    液体传递单元，用于将存储于所述液体存储单元中的液体传递到所述加热元件；
    电源，用于为所述加热元件提供电力；
    电路，被配置为在所述加热元件启动加热期间当所述加热元件的阻值变化率降低至第一阻值变化率所对应的预设时间点之后，来判断存储于所述液体存储单元中的液体是否已减小至阈值。
  2. 根据权利要求1所述的气溶胶生成装置，其特征在于，所述预设时间点是根据所述加热元件的阻值变化率从所述加热元件在初始启动加热时的第二阻值变化率降低至所述第一阻值变化率所对应的时刻来确定的，所述第一阻值变化率为第二阻值变化率的1％～30％。
  3. 根据权利要求1所述的气溶胶生成装置，其特征在于，所述预设时间点在所述加热元件启动持续加热600ms之后；优选的，所述预设时间点在所述加热元件启动持续加热800ms之后；进一步优选的，所述预设时间点在所述加热元件启动持续加热1000ms之后。
  4. 根据权利要求1或2所述的气溶胶生成装置，其特征在于，所述电路被配置为，根据所述加热元件的阻值变化率与预设阻值变化率的大小，来判断存储在所述液体存储单元中的液体是否已减小至阈值。
  5. 根据权利要求4所述的气溶胶生成装置，其特征在于，所述电路被配置为，根据所述加热元件的阻值变化率连续超过所述预设阻值变化率的次数，来判断存储于所述液体存储单元中的液体是否已减小至阈值。
  6. 根据权利要求1-5任一所述的气溶胶生成装置，其特征在于，所述电路被配置为，通过预设缓冲区存储所述加热元件的实时阻值，并计算所述加热元件的阻值变化率：
    K j＝(R N+j-R 0+j)/R 0+j，其中，K j为所述加热元件的阻值变化率，N为预设缓冲区的长度，j为自然数。
  7. 根据权利要求1或2所述的气溶胶生成装置，其特征在于，所述电路还被配置为，根据所述加热元件的实时阻值与超温阈值的大小，判断存储于所述液体存储单元中的液体是否已减小至阈值。
  8. 根据权利要求7所述的气溶胶生成装置，其特征在于，所述电路被配置为：
    若所述加热元件的实时阻值超过超温阈值，则降低输出至所述加热元件的电力，以期望维持所述加热元件的温度为预设温度、或者维持所述加热元件的实时阻值为预设温度对应的阻值；
    若输出至所述加热元件的电力降低至预设电力时，仍未成功维持所述加热元件的温度为预设温度、或者仍未成功维持所述加热元件的实时阻值为预设温度对应的阻值，则判断存储于所述液体存储单元中的液体已减小至阈值。
  9. 根据权利要求1-8任一所述的气溶胶生成装置，其特征在于，所述电路还被配置为：
    在所述加热元件初始启动加热持续至所述预设时间点的期间，获取所述加热元件的初始阻值和M个实时阻值；
    计算每一个实时阻值与所述初始阻值的差值；
    将M个差值与M个预设差值一一对应的进行比较；
    若差值连续超过预设差值的次数大于预设次数，则判断存储于所述液体存储单元中的液体已减小至阈值。
  10. 根据权利要求1-8任一所述的气溶胶生成装置，其特征在于，所述电路还被配置为：
    在所述加热元件初始启动加热持续至所述预设时间点的期间，获取所述加热元件的实时阻值；
    将所述加热元件的实时阻值与预设的最大阈值进行比较；
    若所述加热元件的实时阻值大于预设的最大阈值，则判断存储于所述液体存储单元中的液体已减小至阈值。
  11. 根据权利要求1-10任一所述的气溶胶生成装置，所述电路包括处理器和采样电阻；
    所述处理器具有第一电压采样端口、第二电压采样端口以及推挽输出端口；
    所述加热元件和所述采样电阻串联连接在电源的正极与所述推挽输出端口之间；所述采样电阻的两端分别与所述第一电压采样端口和所述第二电压采样端口连接。
  12. 根据权利要求1-10任一所述的气溶胶生成装置，所述电路包括处理器，依次串联连接在电源的正极与负极之间的开关管、加热元件、采样电阻；
    所述处理器具有第一电压采样端口、第二电压采样端口以及控制端口；
    所述控制端口与所述开关管的控制端连接，以控制所述开关管的导通或者断开；
    所述第一电压采样端口设置在所述开关管与所述加热元件之间，所述第二电压采样端口设置在所述加热元件与所述采样电阻之间。
  13. 一种气溶胶生成装置，其特征在于，包括：
    液体存储单元，用于存储能够生成气溶胶的液体；
    加热元件，用于加热所述液体；
    液体传递单元，用于将容纳于所述液体存储单元中的液体传递到所述加热元件；
    电源，用于为所述加热元件提供电力；
    电路，被配置为在所述加热元件初始启动加热持续至所述加热元件的阻值变化率降低至第一阻值变化率所对应的预设时间点的期间，通过比较加热元件的实时阻值与预设的最大阈值来判断存储于所述液体存储单元中的液体是否已减小至阈值；或者通过比较加热元件的实时阻值和初始阻值之间的差值与预设差值来判断存储于所述液体存储单元中的液体是否已减小至阈值；
    同时被配置为在所述预设时间点之后的加热期间，通过比较加热元 件的阻值变化率与预设阻值变化率来判断存储于所述液体存储单元中的液体是否已减小至阈值。
PCT/CN2021/126447 2020-10-27 2021-10-26 气溶胶生成装置 Ceased WO2022089433A1 (zh)

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