CN108991602B - Aerosol generating device and heating control method thereof - Google Patents
Aerosol generating device and heating control method thereof Download PDFInfo
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- CN108991602B CN108991602B CN201810333844.6A CN201810333844A CN108991602B CN 108991602 B CN108991602 B CN 108991602B CN 201810333844 A CN201810333844 A CN 201810333844A CN 108991602 B CN108991602 B CN 108991602B
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- 239000000443 aerosol Substances 0.000 title claims abstract description 45
- 238000000034 method Methods 0.000 title claims abstract description 45
- 238000001514 detection method Methods 0.000 claims abstract description 55
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- 239000003571 electronic cigarette Substances 0.000 description 5
- SNICXCGAKADSCV-JTQLQIEISA-N (-)-Nicotine Chemical compound CN1CCC[C@H]1C1=CC=CN=C1 SNICXCGAKADSCV-JTQLQIEISA-N 0.000 description 4
- 230000008859 change Effects 0.000 description 4
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- SNICXCGAKADSCV-UHFFFAOYSA-N nicotine Natural products CN1CCCC1C1=CC=CN=C1 SNICXCGAKADSCV-UHFFFAOYSA-N 0.000 description 4
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Images
Classifications
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D23/00—Control of temperature
- G05D23/19—Control of temperature characterised by the use of electric means
- G05D23/1902—Control of temperature characterised by the use of electric means characterised by the use of a variable reference value
- G05D23/1904—Control of temperature characterised by the use of electric means characterised by the use of a variable reference value variable in time
-
- 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
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D23/00—Control of temperature
- G05D23/19—Control of temperature characterised by the use of electric means
- G05D23/20—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature
-
- 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
- A24F40/20—Devices using solid 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
- A24F40/60—Devices with integrated user interfaces
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Thermotherapy And Cooling Therapy Devices (AREA)
Abstract
The invention provides a heating control method for an aerosol generating device, which estimates heating temperature rise time according to the existing temperature and the target temperature of a heating part; then, driving the heating part with the maximum power to heat, and not detecting the temperature/resistance value of the heating part within the estimated heating time; after the heating time, the temperature/resistance value of the heating component is intensively detected so as to control the temperature within the safe temperature range required for generating aerosol. And temperature detection is not carried out in the temperature rising stage, so that the delay effect is solved. The user can suck the aerosol in the shortest time, and the experience is good.
Description
Technical Field
The present invention relates to an aerosol-generating device, and more particularly, to a heating control method for generating an aerosol and an aerosol-generating device.
Background
An aerosol generating device, commonly known as an electronic cigarette, is an electronic product that mimics a traditional cigarette and has a look, smoke, taste and feel similar to a traditional cigarette. Electronic cigarettes heat an aerosol-generating substrate (e.g., tobacco tar, tobacco smoke) by non-combustion heating to form an evaporant that is mixed with air to form an aerosol for the user to consume.
Because the electronic cigarette does not need to burn tobacco to generate tobacco smoke, harmful substances such as carbon monoxide, tar and the like which influence human health are not generated, and the harm to the health of a user can be reduced, so that the electronic cigarette is widely accepted as a tobacco substitute.
The aerosol generation temperature is typically as high as 350 c and typically the safe temperature range of the heat generating component is 280 c to 400 c under aerosol generating operating conditions.
In order to control the temperature of the heating component not to exceed the aerosol generating temperature range, the temperature of the heating component is detected in real time by the conventional electronic cigarette so as to achieve the purpose of temperature control, so that the temperature of the heating component is maintained within a safe temperature range value, and the phenomena of scorching and frying oil caused by overhigh temperature of a heating wire, poor taste caused by insufficient aerosol at too low temperature and the like are avoided.
When the temperature of the heating component rises to the aerosol generation temperature from the ambient temperature, the temperature of the heating component is detected in real time, so that the time delay is increased, the heating time is too long, and the user experience is poor.
Disclosure of Invention
In order for the user to experience a good, immediate/timely inhalation of the aerosol, the heating wire needs to reach the aerosol-generating temperature from the ambient temperature in a short time. In one aspect, the present invention provides a heating control method for an aerosol-generating device, comprising the steps of: s100, detecting the existing temperature of the heating part after receiving the starting signal, and estimating heating temperature rise time according to the existing temperature of the heating part and a target temperature; s110, driving the heating part with the maximum power to heat, and not detecting the temperature of the heating part within the heating temperature rise time; s120, after the estimated heating time, detecting the temperature of the heat generating component at a high frequency to control the temperature within a safe temperature range required for generating aerosol; and S130, stopping driving the heating component with the maximum power after receiving the stop signal.
Preferably, detecting the temperature of the heat generating component includes: and detecting the temperature of the heating component, when the detected temperature is lower than the main working temperature of the heating component, continuing to drive the heating component by the heating power required in the current step, and when the detected temperature is higher than the main working temperature of the heating component, stopping outputting the power, namely, driving the heating component by the zero power.
Preferably, the target temperature is a main operating temperature of the heat generating component, or a temperature value with a safety factor added based on the main operating temperature of the heat generating component, the temperature value being lower than the main operating temperature.
Preferably, the step S120 includes: instead, the heat generating component is driven at a first power that is lower than the maximum power.
Preferably, the frequency of the high frequency in step S120 is determined according to a temperature range required for generating the aerosol.
Preferably, the frequency interval of the high frequency in step S120 ranges from 1ms to 30 ms.
Preferably, the step S130 further includes: starting timing, if the timing exceeds a threshold value, shutting down
In another aspect, the present invention also provides an aerosol-generating device for receiving an aerosol-generating article and heating an aerosol-generating substrate contained by the aerosol-generating article, the aerosol-generating device comprising: the switch component outputs a starting signal and/or a stopping signal according to the operation of a user, and the switch component is any one or the combination of a pneumatic switch, a key switch and a touch switch; a control section for controlling: in the temperature rise stage, temperature detection is not carried out; in the temperature top stage, high frequency temperature detection is performed.
In another aspect, the invention also provides an aerosol-generating system comprising: an aerosol-generating article comprising an aerosol-generating substrate; an aerosol-generating device for fitting the aerosol-generating article; a heat generating component for heating the aerosol-generating substrate; wherein the heat-generating component may be contained in an aerosol-generating article, or an aerosol-generating device, or both; the switch component outputs a starting signal and/or a stopping signal according to the operation of a user, and the switch component is any one or the combination of a pneumatic switch, a key switch and a touch switch; control means, included in the aerosol-generating device, for controlling: in the temperature rise stage, temperature detection is not carried out; in the temperature top stage, high frequency temperature detection is performed.
In another aspect, the invention also provides a control module for an aerosol-generating device comprising: a processor configured to execute instructions to enable the processor to perform: in the temperature rise stage, temperature detection is not carried out; in the temperature top stage, high frequency temperature detection is performed.
In another aspect, the present invention also provides a non-transitory computer-readable storage medium containing instructions that, when executed by a processor, enable the processor to perform: in the temperature rise stage, temperature detection is not carried out; in the temperature top stage, high frequency temperature detection is performed.
According to the invention, the temperature of the heating part is not detected in the temperature rising stage, so that the heating part reaches the main working temperature in the shortest time, and a user can almost immediately suck aerosol, and the experience is good.
Drawings
Figure 1 is a schematic view of an aerosol-generating system according to an embodiment of the invention.
Figure 2 is a schematic diagram of functional modules of an aerosol-generating device according to an embodiment of the invention.
Fig. 3 is a functional block diagram of a control unit according to an embodiment of the present invention.
FIG. 4 is a flow chart illustrating a heating control method according to an embodiment of the invention.
FIG. 5 is a timing diagram of the temperature of the heat generating component during operation according to an embodiment of the present invention.
FIG. 6 is a timing diagram of the temperature of the heat generating component according to another embodiment of the present invention.
FIG. 7 is a timing diagram of the temperature of a heat generating component according to another embodiment of the present invention.
Detailed Description
In order to solve the problem of overlong heating time in the prior art and enable a user to experience good aerosol in real time/in time, the invention provides a heating control method for an aerosol generating device, which can realize that a heating component reaches aerosol generating temperature in the shortest time and can control the temperature of the heated heating component within a safe temperature range required by aerosol generation.
The general idea of the invention is as follows: in the temperature rising stage, the temperature detection is not carried out on the heating component; in the top temperature stage, intensive temperature sensing is performed to control the temperature within the safe temperature range required for aerosol generation.
Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
As used herein, ordinal terms (e.g., "first," "second," "third," etc.) used to refer to elements such as structures, components, operations, etc., do not by themselves connote any priority or order of the elements over another element, but are used merely to distinguish one element from another element having the same name (but for use of the ordinal term).
In the present invention, each puff during the smoking of a cigarette by a user is defined as one puff, and the duration of each puff lasts from the beginning of the puff to the end of the puff. During each suction process, the user inhales forcefully to regard the suction as the beginning; the user stops inhaling, and the end of the puff is considered.
In the present invention, the pumping interval time refers to an interval time between adjacent two pumping.
In the present invention, the start signal is a temperature-up control signal, and the stop signal is a temperature-down control signal. The start signal and the stop signal are not limited to the literal meaning, that is, the start signal includes but is not limited to the meaning of "outputting at maximum power", and there may also be the meaning of "outputting at a certain power"; the stop signal includes, but is not limited to, the meaning of "stop output power". For example, "supply of the power to the heat generating component is stopped in response to the stop signal" does not exclude a meaning of "outputting the power to the heat generating component at another power different from the power" other than the meaning of "stopping outputting the power". Unless the context dictates otherwise.
In the present invention, "detecting temperature" includes, but is not limited to, literal meaning, including the meaning of detecting temperature and/or detecting resistance value, because there is a one-to-one correspondence between temperature and resistance value for a heat generating component made of a material having a temperature coefficient of resistance characteristic.
In the present invention, the temperature rise phase in "the heat generating component is not subjected to temperature detection in the temperature rise phase" does not include the head time point and the tail time point of the phase because temperature detection is possible at the head time point and the tail time point.
Figure 1 is a schematic view of an aerosol-generating system according to an embodiment of the invention. Referring to figure 1, an aerosol-generating system 1 of the present invention comprises an aerosol-generating device 10 and an aerosol-generating article 20, the aerosol-generating device 10 being for use with an aerosol-generating article 20 comprising an aerosol-generating substrate 21 to generate an aerosol by heating the aerosol-generating substrate 21 comprised in the aerosol-generating article 20.
In particular, the aerosol-generating device 10 refers to a device to cooperate with an aerosol-generating article 20 (e.g. to receive or receive the aerosol-generating article 20) and interact with an aerosol-generating substrate 21 to generate an aerosol. The aerosol-generating device 10 may be a "smoking gun" type item.
The aerosol-generating article 20 may be a smoking article, referring to an article comprising an aerosol-generating substrate 21. In use, the aerosol-generating article 20 is fitted with (e.g. inserted or placed into) the aerosol-generating device 10 such that the aerosol-generating substrate 21 and the aerosol-generating device 10 are able to interact to produce an aerosol. The aerosol-generating article 20 may be disposable or may be in a form that can be replenished by the user replacing the disposable smoking article or manually adding an aerosol-generating substrate 21, such as tobacco tar, to continue drawing the aerosol.
By aerosol-generating substrate 21 is meant a substrate of volatile compounds which under certain conditions can form an aerosol, which may be in a liquid state or a solid state. The aerosol-generating substrate 21 is part of an aerosol-generating article 20, for example a smoking article. In the case of an aerosol-generating substrate 21, it is generally necessary to heat the aerosol-generating substrate to an aerosol-generating temperature to form an aerosol, which is mixed with air and then ultimately formed under certain conditions. The composition of the aerosol-generating substrate 21 in liquid form comprises tobacco tar which is heat convertible to a gaseous state, which may include glycerol (glycerin), propylene glycol, a flavour (or fragrance) and nicotine (nicotine), in which the nicotine and/or flavour may be replaced by tobacco extract. The tobacco tar may also contain no nicotine.
Figure 2 is a schematic block diagram of an aerosol-generating device according to an embodiment of the invention. As shown in fig. 2, the aerosol-generating device 10 includes a switch member 100, a power supply member 200, a heat-generating member 300, and a control member 400, wherein the control member 400 is electrically connected to the switch member 100, the power supply member 200, and the heat-generating member 300, respectively, and the power supply member 200 is used for supplying electric energy.
The power supply part 200 serves to supply power to the heat generating part 300 according to the control of the control part 400. Specifically, power supply unit 200 adjusts the output power and output time of the power supply to heat generating unit 300 according to the control of control unit 400. The power supply part 200 may be any suitable power supply and includes corresponding charging, power supply circuits and elements. For example, the power supply part 200 may be a battery such as a lithium ion battery, a lithium iron phosphate battery, a lithium manganese battery, a nickel chromium battery, or a nickel metal hydride battery.
The heat-generating component 300 is used to heat the aerosol-generating substrate 21 contained in the aerosol-generating article 20 to form an aerosol. The heat generating member 300 heats the aerosol-generating substrate 21 by increasing the temperature thereof in response to the power supplied from the power supply member 200 (controlled by the control member 400). The primary operating temperature of the heat-generating component 300 is the temperature at which the heat-generating component 300 heats the aerosol-generating substrate 21 contained in the corresponding aerosol-generating article 20 to form an aerosol vapour and to provide the aerosol as a desired heating temperature for a preferred use experience. The main operating temperature may be a temperature value or a temperature range. The control unit 400 adaptively monitors the temperature of the heat-generating component 300 and controls the temperature of the heat-generating component 300 as little as possible above and/or below the main operating temperature, or as within a safe temperature range as possible, throughout the operation of the aerosol-generating device.
Specifically, for example, the heat generating component 300 may be made of a material having a temperature coefficient of resistance characteristic that has a corresponding relationship with the temperature of the material, and the control component 400 may obtain the temperature of the heat generating component 300 corresponding to the resistance value based on the measured resistance value of the heat generating component 300, thereby controlling the temperature of the heat generating component 300 or controlling the power supplied to the heat generating component 300. The material of the heat generating component 300 includes, but is not limited to, platinum, copper, nickel, titanium, iron, ceramic-based PTC material, polymer-based PTC material, etc., and the resistance value thereof changes with the temperature change of the heat generating component 300 (for example, for a positive temperature coefficient material, the resistance value increases with the temperature increase, and for a negative temperature coefficient material, the resistance value decreases with the temperature increase), so that the temperature change parameter of the heat generating component 300 can be measured by monitoring the resistance change of the heat generating component 300. In other embodiments, the heat generating component 300 may also be made of a conventional heat generating material without the temperature coefficient of resistance, and an additional temperature sensor may be added beside the heat generating component to obtain the temperature of the heat generating component.
In other embodiments, the heat generating component 300 may not be disposed within the aerosol-generating device 10, but rather disposed within the aerosol-generating article 20, and the heat generating component 300 may be electrically connected to the power supply component 200 and the control component 400 when the aerosol-generating article 20 is mated (e.g., inserted or placed into) the aerosol-generating device 10. Both the aerosol-generating device 10 and the aerosol-generating article 20 may be provided with the heat-generating component 300. The present invention is not limited to the specific arrangement of the heat generating component 300.
The switching section 100 outputs a start signal or a stop signal according to the operation of the user, and supplies the start signal or the stop signal to the control section 400. The switching element 100 may be embodied, for example, as a pneumatic switch, or a gas-sensitive switch, or a differential air pressure-sensitive switch. When a user smokes, the pneumatic/gas-sensitive/air pressure difference sensing switch can monitor the air pressure difference caused by the air flow in the device due to the inspiration of the user, and outputs a corresponding starting signal or a corresponding stopping signal according to the monitoring result. In one embodiment, when the pneumatic switch detects the air pressure difference (meaning that the user starts pumping), an activation signal is output, and the control unit 400 receives the activation signal and controls the power supply unit 200 to output power to the heat generating unit to start heating. After the start signal is outputted, the pneumatic switch continuously monitors whether the gas flows into the apparatus, and when the gas does not flow into the apparatus any more (meaning that the pumping by the user is finished), a stop signal is outputted, and the control part 400 receives the stop signal and controls the power supply part 200 to stop/drive the heat generating part at a lower power. The start signal is a signal for controlling the control part 400 to control the temperature of the heat generating part 300 to increase, and after the control part 400 receives the start signal, the control part 400 controls the power supply part 200 to output the power with the maximum power to increase the temperature of the heat generating part 300, so that the temperature of the heat generating part 300 can be increased to the target temperature in the shortest time; the stop signal is a signal for controlling the temperature of the heat generating component 300 to decrease by the control component 400, and when the control component 400 receives the stop signal, the power supply component 200 is controlled to stop outputting power (i.e. outputting zero power) or output another power (lower than the maximum power but greater than zero) to decrease the temperature of the heat generating component 300, preferably outputting at zero power, thereby reducing the complexity of the circuit and the control process. Briefly summarized, the start signal is a temperature-up control signal and the stop signal is a temperature-down control signal.
In one embodiment, the switch unit 100 is a pneumatic switch, when the user starts pumping, the pneumatic switch outputs an activation signal due to a pressure difference, and the control unit 400 receives the activation signal and controls the power supply unit 200 to drive the heat generating unit 300 at the maximum power, so that the heat generating unit 300 rapidly rises from the ambient temperature to the main operating temperature. The heat generating component 300 is then controlled to maintain a safe temperature range for continuous aerosol generation, either at maximum power drive or at a first power (less than maximum power but greater than zero) drive, as described in more detail below. When the user finishes pumping, the pneumatic switch outputs the first stop signal because of no air pressure difference, and after the control unit 400 receives the stop signal, the output power is stopped, that is, the heat generating unit 300 is driven by zero power, and the heat generating unit 300 starts to rapidly cool down. Alternatively, after receiving the stop signal, the control unit 400 drives the heat generating unit 300 with a lower power, such as a second power, and the heat generating unit 300 is not directly cooled to the ambient temperature, but is maintained at a standby temperature lower than the main operating temperature.
In another embodiment, the switch unit 100 is a manual switch, such as a key or touch switch, which outputs a start signal or a stop signal according to whether the user presses or touches the switch unit 100. In this embodiment, the control process is the same as that of the previous embodiment except that the switching means is different. For example, when the user presses or touches the switch unit 100, the start signal is outputted to control the power supply unit 200 to drive the heat generating unit 300 at the maximum power, and the heat generating unit 300 rapidly rises from the ambient temperature to the main operating temperature. The power supply unit 200 then controls the heat generating unit 300 to maintain a safe temperature range to continuously generate aerosol, and during this process, the power supply unit may still be driven at the maximum power, or may be driven at the first power (lower than the maximum power but greater than zero), as will be described in detail below. When the switch member 100 is pressed or touched again, a stop signal is output. The start signal may be output when the user presses or touches the switch member 100 and keeps the pressed or touched state, and the stop signal may be output when the user stops pressing or touching the switch member 100. Or the closing time of the switch does not exceed a certain threshold (such as 0.3 second), which indicates that the switch is touched by mistake, the starting signal is not output, and the heating component does not work; if the switch closing time exceeds the threshold (e.g. 0.3 second), it indicates that the switch system is operated intentionally, and then the start signal is outputted and the heat generating component starts to operate.
In other embodiments, the switch unit 100 can be combined with a pneumatic switch, a key switch, a touch switch, or other types of switch elements. The invention is not limited to the specific composition of the switch block 100. In the embodiment where the switch unit 100 is used by combining a pneumatic switch, a key switch or a touch switch, when a user presses or touches the switch unit 100, the user outputs a first start signal, and after receiving the first start signal, the control unit 400 controls the power supply unit 200 to drive the heat generating unit 300 with the maximum power, and after a preset time, the user may be informed by an indicator light or by vibration. Then, the user starts pumping, triggers the pneumatic switch, outputs a second start signal, and after the control unit 400 receives the second start signal, controls the power supply unit 200 to continue driving the heat generating unit 300 with the maximum power or the first power, so that the heat generating unit 300 quickly reaches the main operating temperature. And then maintained/controlled within a safe temperature range, during which it may still be driven at maximum power, or at a first power (less than maximum power but greater than zero), as will be described in more detail below. When the user finishes pumping, the pneumatic switch is triggered to output a stop signal, and the control unit 400 stops outputting power (i.e., zero power) to the heat generating unit after receiving the stop signal, or drives the heat generating unit with a second power (less than the maximum power but greater than zero) and keeps at a standby temperature.
The control unit 400 adaptively monitors the temperature/resistance of the heat-generating component 300 and controls the temperature of the heat-generating component 300 not to exceed and/or fall too far below the main operating temperature to remain within a safe temperature range throughout the operation of the aerosol-generating device.
FIG. 3 is a block diagram of a control component according to an embodiment of the present invention. As shown in fig. 3, the control unit 400 includes a storage unit 410 and a main control unit 420.
In one embodiment, when the heat generating component 300 is made of a material with a temperature coefficient of resistance characteristic, the main control unit 420 can obtain the corresponding temperature parameter by detecting the magnitude of the resistance of the heat generating component 300. In another embodiment, when the heat-generating component 300 is made of a conventional heat-generating material, a separate temperature detecting unit, such as a temperature sensor, may be installed near the heat-generating component 300. The temperature sensor is used to sense the temperature of the heat generating component 300.
As an illustrative, non-limiting example, the storage unit 410 may include one or more memory devices, such as RAM, ROM, flash memory, or a combination thereof. The memory unit 410 also stores instructions, the relationship between the resistance value and the temperature of the heat-generating component, and one or more threshold values (and/or parameter values). In another aspect, the memory may store instructions that, when executed by the processor, enable the processor to perform operations according to aspects of the invention, such as one or more of the operations described in FIG. 4.
The main control unit 420 controls the power supply part 200 to output power to the heat generating part 300 or stop outputting power according to the output signal of the switching part, based on the detected resistance value of the heat generating part 300 and the information provided from the storage unit 420.
The master control unit 420 may include one or more processors. The processor may be connected to a memory 410. For example, the processor may be configured to access or receive instructions 411 in the memory 410, a relationship 412 between resistance values and temperatures of the heat-generating components, and/or one or more thresholds 413 (and/or parameter values). In some implementations, the processor may also include another memory (not shown), such as a cache memory or other local memory. The processor may be configured to execute software (e.g., a program represented by one or more instructions) stored in a respective memory 410 (e.g., a non-transitory computer-readable storage medium). For example, a processor (e.g., one or more processors) may be configured to execute instructions 411, enabling the processor to perform one or more operations as shown in fig. 4.
Fig. 4 shows a flow chart of an aerosol-generating heating control method according to an embodiment of the present invention, which is suitable for use in the aerosol-generating system 1 and is specifically controlled to be executed by the control component 400 of the aerosol-generating device 10. The heating control method is for heating an aerosol-generating substrate 21 in an aerosol-generating article 20 after the aerosol-generating article 20 is fitted to an aerosol-generating device 10.
The heating control method comprises the following steps:
in step S100, after receiving the start-up signal, detecting the current temperature of the heat generating component 300, estimating a heating temperature rise time based on the current temperature of the heat generating component and the target temperature thereof, and based on the maximum power; go to step S110.
In particular, the activation signal may be from a switch component, but also from other triggers, such as triggering the activation signal when the aerosol-generating article is inserted into the aerosol-generating device, the invention not being limited.
With respect to the existing temperature of the heat generating component, there are two cases: (1) when the user is not sucking for a long time, the existing temperature of the heat generating component is the ambient temperature, typically below 40 ℃. (2) If the puff interval is short (e.g. 4s), or the aerosol-generating device is set to a standby temperature, or otherwise, during the smoking process of the user, this may result in the existing temperature of the heat-generating component at the beginning of each puff being higher than the ambient temperature, e.g. 100 c or above, but lower than the main operating temperature.
As for the target temperature of the heat generating component, the main operating temperature of the heat generating component may be set as the target temperature, or the main operating temperature may be subtracted by a safety range value as the target temperature. For example, in one embodiment, where the primary operating temperature of the heat-generating component is 350 ℃, then the target temperature may be set to 350 ℃ or 300 ℃, leaving a safety redundancy of 50 ℃; or the target temperature is set to 250 c leaving a safety redundancy of 100 c.
In step S110, the heating component 300 is driven with the maximum power to heat, and the temperature/resistance value of the heating component 300 is not detected during the estimated heating time; go to step S120.
In particular, parameters of the entire aerosol-generating device, such as the charge level of the battery, the temperature of the environment, etc., are typically also detected prior to heating, and heating is initiated when all parameters are normal. The invention is not limited.
The control part 400 controls the heat generating part 300 to be driven at the maximum power to start generating aerosol from the ambient temperature to the main operating temperature (e.g., 350 ℃) in the shortest time. In the whole heating and warming process, the control part 400 does not detect the temperature of the heat generating part 300, so that the user can inhale the aerosol almost without waiting, and the experience is better.
If the control unit 400 still needs to detect the temperature of the heat generating component 300 in real time during the whole heating process from the ambient temperature to the main working temperature, the time delay is increased, the time from the ambient temperature to the main working temperature is too long, the user is likely to suck the raw oil, and the experience is poor.
In step S120, after the heating time, the heating component is continuously driven with the maximum power or the first power, and the temperature/resistance value of the heating component 300 is detected to be within the safety temperature range required for generating aerosol; go to step S130.
Specifically, after the above-described heating rise time, it means that the temperature of the heat-generating member 300 has reached the target temperature (e.g., 350 ℃). In order to control and/or maintain the heated temperature of the heat generating component within the safe temperature range required for generating aerosol, and to avoid scorching and frying oil due to the over-high temperature of the heat generating component, the temperature/resistance value of the heat generating component 300 needs to be detected intensively, for example, every 10ms (10ms is just an example, and the invention is not limited thereto). In the intensive detection stage, if the detection result is not higher than the main working temperature, the heat generating component 300 is continuously driven to heat with the maximum power or the first power; the temperature/resistance value detection is performed again after 10ms, and if the detection result is higher than the working temperature, the power supply to the heating component 300 is stopped, which is equivalent to driving the heating component 300 with zero power; then, the temperature/resistance value detection is carried out after 10ms, and if the detection result is lower than the main working temperature, the heating component 300 is driven to heat by the maximum power or the first power; then, after 10ms, temperature/resistance value detection is carried out; continuously circulating; until a stop signal is received.
In this embodiment, the temperature/resistance detection interval of 10ms is merely an example, and the present invention is not limited thereto. The preferred range of the detection interval may be 1ms to 30 ms.
The setting of the detection interval and the safe temperature range are relevant. For example, the main operating temperature is 350 ℃ and the safety temperature range is around 350 ℃ ± 50 ℃, where the maximum acceptable detection interval can be estimated to be 30 ms. In other words, the smaller the detection interval, the smaller the fluctuation range of the main operating temperature, and the larger the detection interval, the larger the fluctuation range of the main operating temperature.
The setting of the detection interval is also related to the drive power. If driven at a first power (less than maximum power) to be controlled within the same safe temperature range, the maximum acceptable detection interval may be greater than if driven at maximum power. For example, to control within the same safe temperature range of 350 ℃ ± 50 ℃, if driven at maximum power, the maximum acceptable detection interval is estimated to be 30 ms; if driven at a maximum power of 2/3 (first power), then the estimated maximum acceptable detection interval may be 40 ms; this is merely an exemplary description.
In step S130, after receiving the stop signal, stopping supplying power to the heat generating component 300; or driving the heat generating component 300 at a second power; and starts timing to wait for the next start signal (i.e. wait for the next pumping) to step S140.
Specifically, the reception of the stop signal means that the user stops pumping, (1) the supply of power to the heat-generating component 300 is stopped, and the heat-generating component 300 is naturally cooled. Or (2) driving the heat generating component 300 at a second power (less than the maximum power) such that the heat generating component 300 is maintained at a standby temperature at which no aerosol is generated when no suction is applied. In the case of the (1) th case, the temperature of the heat generating component may or may not be detected. If detected, the frequency may be determined based on the pumping interval time. Typically, the average time between two puffs is about 6 seconds, and then the detection may be set every 1 second, where 1 second is merely an example and the invention is not limited thereto. In the case of the case (2), the temperature of the heat generating component is not detected during the process of lowering from the main operating temperature to the standby temperature, and a temperature lowering time can be estimated from the standby temperature and the main operating temperature, and the temperature is not detected during the temperature lowering time, and after the temperature lowering time has elapsed, the standby temperature is maintained by detecting the temperature at a high frequency, which is the same principle as the principle of maintaining the standby temperature.
The temperature detection can be carried out in the temperature reduction process because the temperature reduction process is the non-pumping time, so that the time delay can not be brought to a client by carrying out the temperature detection, and the user experience can not be influenced. The temperature sensing is performed to improve safety against abnormal temperature surges caused by faults. The frequency of temperature detection during temperature drop can be set as desired.
In step S140, if the control part 400 receives the next start signal, it returns to step S100 and repeats the entire process. If the timed length (i.e., the no-pump time) exceeds a certain threshold, then shutdown occurs.
It should be understood that the threshold is generally not less than the puff interval but is much greater than the puff interval. Typically, the pumping intervals averaged 5 s. For example, a threshold of 2 minutes may be selected, with over 2 minutes meaning that the customer does not want to smoke any more, and a shutdown operation is performed.
The invention does not detect the temperature at all times during the user's pumping process, but instead places the temperature detection in the top temperature phase and does not do it during the temperature rise phase. Thus, the user does not experience a delay, and the user experience is not affected.
The present invention treats each puff of the user as a puff. The above steps S100 to S140 are applied to each pumping process.
Fig. 5 is a graph of temperature over time for the aerosol-generating device 10 and/or the heat-generating component 300 within the aerosol-generating article 20 using an aerosol-generating heating control method according to an embodiment of the invention as shown in fig. 4.
In fig. 5, T is the main operating temperature of the heat generating component 300, which is also the aerosol generating temperature. When the user starts the first suction, the heating temperature-rise time is estimated to be T1 (e.g., 250ms) from the current temperature (ambient temperature) and the target temperature (T) of the heat-generating component 300, and then the heat-generating component 300 is driven at the maximum power for a time period T1, and during the heating temperature rise at T1, the temperature/resistance value detection is not performed on the heat-generating component. After time t1, the temperature/resistance of the heat generating component starts to be detected intensively, and the detection interval is Δ t (for example, 10 ms). After time T1, the temperature of the heat generating component is detected for the first time as T1. T1 may be the same as T or different from T because the estimate at time T1 may have errors. In fig. 5, T1< T, the heating element continues to be driven at maximum power for heating; after Δ T, the temperature/resistance value detection is performed again, and if the detection result is T2 and T2> T, the power supply to the heat generating component is stopped; then, after delta T, carrying out temperature/resistance value detection again, and if the detection result is lower than T, driving the heating part to heat with the maximum power; then, after delta t, carrying out temperature/resistance value detection; continuously circulating; until the stop signal (end of pumping) is received at time t2, the power supply to the heat generating component is stopped, and the temperature of the heat generating component naturally decreases.
This process of the heat generating component rising from the existing temperature to the target temperature is called the temperature rise phase; then, the aerosol generation phase is carried out, the temperature is maintained/controlled within a safe temperature range of the main working temperature, and the phase is called a temperature top phase; and after the pumping is finished, entering a temperature reduction stage.
In the temperature rising stage, the temperature/resistance value of the heating part is not detected; in the temperature top stage, carrying out temperature/resistance value intensive detection on the heating part; in the temperature drop stage, the temperature/resistance value of the heat generating component may not be detected, and the temperature detection may also be performed, which is not limited in the present invention.
In one embodiment, the temperature main-up phase is driven at maximum power, the temperature top phase is also driven at maximum power, and the temperature down phase is driven at zero power. In this embodiment, the design of both the circuit and the control method is relatively simple.
In another embodiment, the temperature main-rise phase is driven at maximum power, the temperature top phase is driven at a first power lower than the maximum power, and the temperature fall phase is driven at zero power or a second power lower than the maximum power. The first power lower than the maximum power is set so that the fluctuation range of the top stage of the temperature is not so large (also in the case of the detection interval); the second power, which is lower than the maximum power, is set to maintain a standby temperature when not pumping.
In fig. 5, the aerosol-generating temperature fluctuation range of the top temperature stage is controlled to be in the range of (T1 to T2), which is associated with the detection interval Δ T, and the driving power.
If the pumping interval between two pumping is long, the temperature of the heat generating component may be lowered to the ambient temperature before the next start signal (second pumping) is received at time t3, and the whole heating process is repeated. It can be readily seen that figure 5 shows a process with three puffs.
If the ambient temperature is high, the temperature of the heat generating component 300 does not drop so fast, or the pumping interval between two pumping is short, and it is likely that the temperature of the heat generating component has not dropped to the ambient temperature when the next activation signal (second pumping) is received at time t3, where the temperature change curve is shown in fig. 6.
Referring to fig. 6, the heating control process of the first suction is the same as that of fig. 5, but at the second suction start time T3 of fig. 6, the detected temperature value is T3; estimating a heating time period T4-T3 according to the existing temperature T3 and the target temperature T of the heating component; then, the heating part is driven by the maximum power, and temperature/resistance value detection is not carried out in the heating time period of t4-t 3; after time t4, the temperature/resistance of the heat generating component starts to be detected intensively, and the detection interval is Δ t (for example, 10 ms). The subsequent steps are the same as in fig. 5.
It is readily seen that fig. 6 also shows the process of three-port pumping. Fig. 6 differs from fig. 5 only in that: because of the short pumping interval, the heat generating components are now at a temperature greater than ambient temperature during the second and third pumping operations. But the entire heating control process is the same.
Fig. 7 is another graph of the temperature of the aerosol-generating device 10 and/or the heat-generating component 300 within the aerosol-generating article 20 as a function of time using an aerosol-generating heating method according to an embodiment of the invention as shown in fig. 4.
Fig. 7 and 5 differ only in that: from the present temperature (ambient temperature) and the target temperature (T), the estimated heating time T1' is shorter than T1 in fig. 5 because of the safety factor taken into account in the estimation process. Thus, the temperature detected at T1' is T3, since T3< T, heating continues at maximum power. After Δ T, the temperature was again detected as T1, since T1 is still less than T, and heating continues at maximum power. After Δ T, the temperature was again detected as T2, because T2> T, the output power was stopped. The process is repeated until the pumping is finished. The heating control method is the same as that of fig. 5 except that the estimated heating time period is shorter, resulting in a longer intensive detection period t2-t 1'.
It is readily seen that fig. 7 also shows the process of three-port pumping.
It should be understood that fig. 5, 6 and 7 are merely schematic representations, not drawn to scale, with certain details exaggerated and possibly omitted for clarity.
In summary, the aerosol generation heating control method, device and system provided by the present invention do not perform temperature/resistance detection during the temperature rising stage, so that the user does not feel the delay caused by the temperature/resistance detection.
It should be understood that the above preferred embodiments are only for illustrating the technical solutions of the present invention, and not for limiting the same, and those skilled in the art can modify the technical solutions described in the above preferred embodiments or substitute some technical features thereof; and all such modifications and alterations are intended to fall within the scope of the appended claims.
Claims (19)
1. A heating control method for an aerosol-generating device, each puff comprising a temperature-up phase, a temperature-top phase, a temperature-down phase, characterized in that:
in the temperature rising stage, the heating part is driven to heat by the maximum power, and the temperature is not detected; in the temperature top stage, high-frequency temperature detection is carried out, and the value range of the frequency interval of the high frequency is 1 ms-30 ms; in the temperature falling stage, driving the heat generating component to heat with a second power, and performing temperature detection, wherein the second power is lower than the power used in the temperature top stage;
the temperature rising stage is a stage of rising the temperature of the heating component from the existing temperature to a target temperature, the temperature top stage is a stage of maintaining or controlling the temperature within a safe range of the main working temperature, and the temperature falling stage is a stage of falling the temperature from the safe range of the main working temperature to the existing temperature at the next time of pumping;
the target temperature is a temperature value that increases a safety factor based on a main operating temperature of the heat generating component, the temperature value being lower than the main operating temperature.
2. The heating control method according to claim 1, characterized in that:
and in the temperature top stage, the heating component is driven to heat at the maximum power.
3. The heating control method according to claim 1, characterized in that:
driving the heat generating component to heat at a first power lower than the maximum power during the temperature top phase.
4. The heating control method according to any one of claims 1 to 3, wherein the high-frequency temperature detection includes:
and detecting the temperature of the heating component, continuing to drive the heating component with the heating power required by the current stage when the detected temperature is lower than the main working temperature of the heating component, and stopping outputting the power, namely, zero power to the heating component when the detected temperature is higher than the main working temperature of the heating component.
5. A method of heating control for an aerosol-generating device, wherein each puff comprises the steps of:
s100, detecting the existing temperature of a heating part after receiving a starting signal, and estimating heating temperature rise time t1 according to the existing temperature of the heating part and a target temperature, wherein the target temperature is a temperature value with a safety coefficient increased based on the main working temperature of the heating part, and the temperature value is lower than the main working temperature;
s110, driving the heating component with maximum power to heat, and not detecting the temperature of the heating component during the heating temperature rise time t 1;
s120, after the heating temperature-raising time t1, detecting the temperature of the heat-generating component at a high frequency to control the temperature within a safe temperature range of a main working temperature required for generating aerosol, wherein a frequency interval of the high frequency is in a range of 1ms to 30 ms;
s130, after receiving the stop signal, stopping driving the heat generating component with the maximum power, driving the heat generating component with the second power for heating, and performing temperature detection, wherein the second power is lower than the power used in the step S120.
6. The control method according to claim 5, wherein the step S120 of detecting the temperature of the heat generating component includes: and detecting the temperature of the heating component, when the detected temperature is lower than the main working temperature of the heating component, continuing to drive the heating component by the heating power required in the current step, and when the detected temperature is higher than the main working temperature of the heating component, stopping outputting the power, namely, driving the heating component by the zero power.
7. The control method according to claim 5, wherein the step S120 includes: instead, the heat generating component is driven at a first power that is lower than the maximum power.
8. The control method according to claim 5, wherein the frequency of the high frequency in step S120 is determined according to a temperature range required for generating the aerosol.
9. The control method according to claim 5 or 6, wherein the step S130 further includes: and starting timing, and if the timing exceeds a threshold value, shutting down the computer.
10. An aerosol-generating device for receiving an aerosol-generating article and heating an aerosol-generating substrate contained by the aerosol-generating article, the aerosol-generating device comprising:
the switch component outputs a starting signal and/or a stopping signal according to the operation of a user, and the switch component is any one or the combination of a pneumatic switch, a key switch and a touch switch;
control means for performing the steps of:
s100, detecting the existing temperature of a heating part after receiving a starting signal, and estimating heating temperature rise time t1 according to the existing temperature of the heating part and a target temperature, wherein the target temperature is a temperature value with a safety coefficient increased based on the main working temperature of the heating part, and the temperature value is lower than the main working temperature;
s110, driving the heating component with maximum power to heat, and not detecting the temperature of the heating component during the heating temperature rise time t 1;
s120, after the heating temperature-raising time t1, detecting the temperature of the heat-generating component at a high frequency to control the temperature within a safe temperature range of a main working temperature required for generating aerosol, wherein a frequency interval of the high frequency is in a range of 1ms to 30 ms;
s130, after receiving the stop signal, stopping driving the heat generating component with the maximum power, driving the heat generating component with the second power for heating, and performing temperature detection, wherein the second power is lower than the power used in the step S120.
11. An aerosol-generating device according to claim 10 in which the heat-generating component is provided in the aerosol-generating device or the heat-generating component is provided in the aerosol-generating article.
12. An aerosol-generating device according to claim 10, wherein the step S120 of detecting the temperature of the heat-generating component comprises: and detecting the temperature of the heating component, when the detected temperature is lower than the main working temperature of the heating component, continuing to drive the heating component by the heating power required in the current step, and when the detected temperature is higher than the main working temperature of the heating component, stopping outputting the power, namely, driving the heating component by the zero power.
13. An aerosol-generating device according to claim 10, wherein the step S120 comprises: instead, the heat generating component is driven at a first power that is lower than the maximum power.
14. An aerosol-generating device according to claim 10, wherein the frequency of the high frequency in step S120 is determined according to a temperature range required for generating the aerosol.
15. An aerosol-generating device according to any one of claims 10 to 14, wherein the step S130 further comprises: and starting timing, and if the timing exceeds a threshold value, shutting down the computer.
16. An aerosol-generating system, comprising:
an aerosol-generating article comprising an aerosol-generating substrate;
an aerosol-generating device for fitting the aerosol-generating article;
a heat generating component for heating the aerosol-generating substrate; wherein the heat-generating component is contained in an aerosol-generating article, or in an aerosol-generating device, or in both the aerosol-generating article and the aerosol-generating device;
the switch component outputs a starting signal and/or a stopping signal according to the operation of a user, and the switch component is any one or the combination of a pneumatic switch, a key switch and a touch switch;
control means incorporated in the aerosol-generating device for performing a control method according to any of claims 5 to 9.
17. A control module for an aerosol-generating device, comprising:
a processor configured to execute instructions enabling the processor to perform the control method of any one of claims 5 to 9;
a memory coupled to the processor and configured to store the instructions.
18. The control module of claim 17, further comprising a switch coupled to the processor, the switch configured to output the start signal and/or stop signal in accordance with a user operation.
19. A non-transitory computer-readable storage medium having instructions stored thereon, wherein the instructions, when executed by a processor, enable the processor to perform the control method of any one of claims 5 to 9.
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| CN201810333844.6A CN108991602B (en) | 2018-04-13 | 2018-04-13 | Aerosol generating device and heating control method thereof |
| PCT/CN2018/125687 WO2019196514A1 (en) | 2018-04-13 | 2018-12-29 | Aerosol generating device and heating control method therefor |
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| CN201810333844.6A CN108991602B (en) | 2018-04-13 | 2018-04-13 | Aerosol generating device and heating control method thereof |
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- 2018-04-13 CN CN201810333844.6A patent/CN108991602B/en not_active Expired - Fee Related
- 2018-12-29 WO PCT/CN2018/125687 patent/WO2019196514A1/en active Application Filing
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| Publication number | Publication date |
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| CN108991602A (en) | 2018-12-14 |
| WO2019196514A1 (en) | 2019-10-17 |
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