CN114271554A - Aerosol generating system and control method thereof - Google Patents
Aerosol generating system and control method thereof Download PDFInfo
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- CN114271554A CN114271554A CN202210005975.8A CN202210005975A CN114271554A CN 114271554 A CN114271554 A CN 114271554A CN 202210005975 A CN202210005975 A CN 202210005975A CN 114271554 A CN114271554 A CN 114271554A
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Images
Abstract
The invention discloses an aerosol generating system and a control method thereof. The aerosol-generating system comprises: an aerosol-generating substrate, a heating chamber, a power supply, a heater and a controller, wherein the heating chamber is for receiving the aerosol-generating substrate in operation; the heater includes at least one heating resistor element having a resistance value varying with temperature; a heating circuit and a thermometry circuit may be configured within the aerosol-generating system; the heating circuit comprises a power supply and a heating resistive element, the power supply providing electrical energy to the heating resistive element under the control of the controller to heat the aerosol-generating article; the temperature measuring circuit is used for measuring or utilizing a quantity related to the temperature of the heating resistance element; when the temperature measuring device works, the controller controls the connection and disconnection of the heating loop and the temperature measuring loop.
Description
Technical Field
The patent relates to the technical field of novel tobacco, in particular to a heating body temperature detection method of an aerosol generation system.
Background
In recent years, with the growing concern of people on health, people are aware that traditional cigarettes have certain harm to health, and the problem of influence of traditional cigarettes on health and environment is gradually paid attention to by countries all over the world.
In the existing electronic cigarette products, if a resistance type heating mode is adopted, two methods for detecting the temperature of a heating body are generally adopted: firstly, a temperature sensor is additionally arranged on a heating body to capture the temperature; and the resistance (heating ring or temperature measuring ring) of the heating element loop is detected to indirectly feed back the temperature value. The former needs to additionally add a temperature measuring element and is not suitable for an internal heating mode, for example, the protruded temperature measuring element influences the flatness of the surface of a heating body, thereby influencing the insertion and extraction of cigarettes; the latter mode practicality is stronger, but need concatenate the sampling resistor with heating resistor for measuring current, if the sampling resistor resistance is great, then can consume some energy and influence rate of heating, if the sampling resistor resistance is less, then can the signal less, needs extra signal amplification circuit to handle.
It is therefore desirable to provide a new aerosol generating system and method of controlling the same that avoids excessive power consumption by the temperature sensing element, simplifies circuit design, reduces cost, and is compatible with both externally and internally heated aerosol generating devices.
Disclosure of Invention
The invention aims to provide a brand-new aerosol generating system and a control method thereof, so that excessive energy consumption of a temperature measuring element is avoided, the circuit design can be simplified, the cost can be reduced, and the aerosol generating system can be simultaneously suitable for an external heating device and an internal heating device.
In order to solve the technical problems, the invention adopts the following technical scheme:
an aerosol-generating system comprising: an aerosol-generating substrate, a heating chamber, a power source, a heater and a controller, wherein the heating chamber is for receiving the aerosol-generating substrate in operation; the heater includes at least one heating resistor element having a resistance value that varies with temperature; a heating circuit and a thermometry circuit may be configured within the aerosol-generating system; the heating circuit comprises the power source and the heating resistive element, the power source providing electrical energy to the heating resistive element under control of a controller to heat the aerosol-generating article; the temperature measuring circuit is used for measuring or utilizing a quantity related to the temperature of the heating resistance element; when the temperature measuring device works, the controller controls the connection and disconnection of the heating loop and the temperature measuring loop.
Further, when the heating circuit is connected, the power element in the heating circuit is only the heating resistance element.
Further, the temperature measuring loop comprises a capacitor.
Further, the temperature sensing circuit is selectively switchable between a capacitive charging configuration and a capacitive discharging configuration.
Further, when the temperature measuring circuit is switched to the capacitor charging structure or the capacitor discharging structure, the controller monitors the voltage change or the current change of the capacitor.
Further, the controller measures or utilizes a quantity related to the temperature of the heating resistance element by monitoring the voltage change or the current change of the capacitance.
Further, when the temperature measuring circuit is switched to the capacitor charging structure, the heating resistance element is connected in series with the capacitor.
Further, when the temperature measuring circuit is switched to the capacitor charging structure, the heating resistance element is connected in parallel with the capacitor.
Further, when the temperature measuring circuit is switched to the capacitor discharge structure, the heating resistance element is disconnected from the capacitor discharge structure.
Further, when the temperature measuring circuit is switched to the capacitor discharge structure, the heating resistance element is connected in series with the capacitor.
Further, the heating resistor element with the resistance value changing along with the temperature is a positive temperature coefficient resistor element.
A method of controlling an aerosol-generating system, the aerosol-generating system comprising: an aerosol-generating substrate, a heating chamber, a power source, a heater and a controller, wherein the heating chamber is for receiving the aerosol-generating substrate in operation; the heater includes at least one heating resistor element having a resistance value that varies with temperature; a heating circuit and a thermometry circuit may be configured within the aerosol-generating system; the heating circuit comprises the power source and the heating resistive element, the power source providing electrical energy to the heating resistive element under control of a controller to heat the aerosol-generating article; the temperature measuring circuit is used for measuring or utilizing a quantity related to the temperature of the heating resistance element; the control method of the aerosol-generating system comprises the steps of: the controller is communicated with the heating loop to control the heating loop; disconnecting the controller from controlling the heating circuit; the controller is communicated to control the temperature measuring loop; and disconnecting the controller to control the temperature measuring loop.
Further, when the heating circuit is connected, the power element in the heating circuit is only the heating resistance element.
Further, when the heating circuit is communicated, the temperature measuring circuit comprises a capacitor.
Further, the thermometry circuit is selectively switchable between a capacitive charging configuration and a capacitive discharging configuration, the method of controlling the aerosol-generating system comprising the steps of: the temperature measuring loop is switched to the capacitor charging structure; the temperature measuring loop is switched to the capacitor discharge structure.
Further, the control method of the aerosol-generating system comprises the steps of: and when the temperature measuring loop is switched to the capacitor charging structure or the capacitor discharging structure, monitoring the voltage change or the current change of the capacitor.
Further, the control method of the aerosol-generating system comprises the steps of: measuring or using a quantity related to the temperature of the heating resistance element by monitoring the voltage change or the current change of the capacitance.
Further, when the thermometry circuit is switched to the capacitive charging configuration, the heating resistive element is in series with the capacitor, and the control method of the aerosol-generating system comprises the steps of: step 1: disconnecting the heating loop, switching the temperature measuring loop to the capacitor charging structure, and performing step 2: measuring or using a quantity related to the temperature of the heating resistive element by monitoring the voltage or current change of the capacitance, step 3: communicating the heating loop, switching the temperature measuring loop to the capacitor discharging structure, and repeating the steps 1-3; or the control method of the aerosol-generating system comprises the steps of: step 1: disconnecting the heating loop, switching the temperature measuring loop to the capacitor charging structure, and performing step 2: communicating the heating loop, switching the temperature measuring loop to the capacitor discharging structure, and performing step 3: measuring or using a quantity related to the temperature of the heating resistive element by monitoring the voltage change or the current change of the capacitance; repeating the steps 1-3.
Further, when the thermometric circuit is switched to the capacitive charging configuration, the heating resistive element is connected in parallel with the capacitor, and the control method of the aerosol-generating system comprises the steps of: step 1: the heating loop is communicated, the temperature measuring loop is switched to the capacitor charging structure, and the step 2: measuring or using a quantity related to the temperature of the heating resistive element by monitoring the voltage or current change of the capacitance, step 3: disconnecting the heating loop, switching the temperature measuring loop to the capacitor discharging structure, and repeating the steps 1-3; or the control method of the aerosol-generating system comprises the steps of: step 1: the heating loop is communicated, the temperature measuring loop is switched to the capacitor charging structure, and the step 2: disconnecting the heating loop, switching the temperature measuring loop to the capacitor discharging structure, and 3: repeating steps 1-3 by monitoring the voltage change or current change measurement of the capacitance or using a quantity related to the temperature of the heating resistance element.
Further, when the temperature measurement circuit is switched to the capacitive discharge configuration, the heating resistor element is disconnected from the capacitive discharge configuration, and the control method of the aerosol generation system includes the steps of: step 1: the heating loop is communicated, the temperature measuring loop is switched to the capacitor charging structure, and the step 2: measuring or using a quantity related to the temperature of the heating resistive element by monitoring the voltage or current change of the capacitance, step 3: keeping the heating loop connected, switching the temperature measuring loop to the capacitor discharging structure, and repeating the steps 1-3; or the control method of the aerosol-generating system comprises the steps of: step 1: the heating loop is communicated, the temperature measuring loop is switched to the capacitor charging structure, and the step 2: keeping the heating loop communicated, switching the temperature measuring loop to the capacitance discharging structure, and 3: repeating steps 1-3 by monitoring the voltage change or current change measurement of the capacitance or using a quantity related to the temperature of the heating resistance element.
Further, when the thermometric circuit is switched to the capacitive discharge configuration, the heating resistive element is in series with the capacitor, and the control method of the aerosol-generating system comprises the steps of: step 1: the heating loop is communicated, the temperature measuring loop is switched to the capacitor charging structure, and the step 2: measuring or using a quantity related to the temperature of the heating resistive element by monitoring the voltage or current change of the capacitance, step 3: disconnecting the heating loop, switching the temperature measuring loop to the capacitor discharging structure, and repeating the steps 1-3; or the control method of the aerosol-generating system comprises the steps of: step 1: the heating loop is communicated, the temperature measuring loop is switched to the capacitor charging structure, and the step 2: disconnecting the heating loop, switching the temperature measuring loop to the capacitor discharging structure, and 3: repeating steps 1-3 by monitoring the voltage change or current change measurement of the capacitance or using a quantity related to the temperature of the heating resistance element.
Further, the heating resistor element with the resistance value changing along with the temperature is a positive temperature coefficient resistor element.
The aerosol-forming substrate may be for use in an aerosol-generating article, amongst other smoking articles, which generates an aerosol that is inhalable directly into a user's lungs through the user's mouth by heating.
Preferably, the aerosol-forming substrate is a solid aerosol-forming substrate. The aerosol-forming substrate may comprise both solid and liquid components, or may comprise only liquid components.
Preferably, the aerosol-forming substrate comprises nicotine. In some preferred embodiments, the aerosol-forming substrate comprises tobacco. For example, the aerosol-forming material may be formed from a sheet of homogenised tobacco.
Alternatively or additionally, the aerosol-forming substrate may comprise a tobacco-free aerosol-forming material. For example, the aerosol-forming material may be a sheet comprising a nicotine salt and an aerosol former.
If the aerosol-forming substrate is a solid aerosol-forming substrate, the solid aerosol-forming substrate may comprise one or more of a powder, granules, pellets, fragments, shreds, sticks or sheets containing one or more of herbaceous plant leaves, tobacco ribs, flat tobacco and homogenised tobacco.
In this patent, aerosol former is used to describe any suitable known compound or mixture of compounds which, in use, promotes the formation of an aerosol and which is substantially resistant to thermal degradation at the operating temperature of the aerosol-generating article.
Suitable aerosol-forming agents are known in the art and include, but are not limited to: polyhydric alcohols such as propylene glycol, triethylene glycol, 1, 3-butanediol, and glycerin; esters of polyhydric alcohols, such as monoacetin, diacetin, or triacetin; and aliphatic esters of mono-, di-or polycarboxylic acids, such as dimethyl dodecanedioate and dimethyl tetradecanedioate. Preferred aerosol formers are polyols or mixtures thereof, such as propylene glycol, triethylene glycol, 1, 3-butanediol, and most preferably glycerol.
The aerosol-forming substrate may comprise a single aerosol former. Alternatively, the aerosol-forming substrate may comprise a combination of two or more aerosol-forming agents.
The aerosol-forming article comprising the aerosol-forming substrate may have the appearance of a conventional cigarette, preferably the aerosol-forming article comprises the aerosol-forming substrate, a support element, an aerosol-cooling element and a mouthpiece.
Aerosol-generating devices are used to describe devices that interact with an aerosol-forming substrate of an aerosol-generating article to generate an aerosol. Preferably, the aerosol-generating device is a smoking device that interacts with an aerosol-generating substrate of an aerosol-generating article to generate an aerosol that is directly inhalable into a user's lungs through the user's mouth. The aerosol-generating device may be a holder for a smoking article.
The heating mode of the smoking set can utilize the principle of resistance heating, and can also utilize the principles of infrared heating and electromagnetic induction heating. The resistance heating mainly comprises inner core heating, peripheral heating and internal and external mixed heating. Infrared heating is primarily peripheral heating. A heater may also be provided in the aerosol-generating article, the heater being electrically connected to the smoking article when the aerosol-generating article is connected to the smoking article. The heater is preferably needle, strip, leaf or tube shaped.
The heating resistor elements have the appropriate temperature coefficient of resistance characteristics, which is a measure of the change in resistance for a given change in temperature. This can be derived by the following equation:
R＝R0·(1+αT)
where R is resistance, R0 is resistance at a given temperature (typically 0 ℃), T is temperature, and α is temperature coefficient of resistance. The temperature dependence of the conductor is substantially linear. Typically, resistive materials have a reasonably reliable temperature coefficient of resistance α. In other words, the temperature coefficient of resistance α does not change significantly over time or under certain conditions. In addition, it may be advantageous to use a material with a larger value of the temperature coefficient of resistance α, since this would mean that a smaller amount of temperature change results in a larger amount of resistance change. Materials with larger alpha values include platinum, nickel and copper.
On the occasion of large temperature difference, the method can be more accurately calculated by the following formula:
R＝R0·(1+αT+βT2)
where β is the second order temperature coefficient of resistance.
The resistance temperature may be estimated by a table lookup method, an interpolation method, an extrapolation method, or the like.
The aerosol-generating device is a portable or handheld aerosol-generating device that a user can comfortably hold between the fingers of a single hand. The aerosol-generating device may be substantially cylindrical in shape. The aerosol-generating device may have a length of between about 70 mm and about 120 mm.
The power source may be any suitable power source, for example a dc voltage source, such as a battery. In one embodiment, the power source is a lithium ion battery. Alternatively, the power source may be a nickel metal hydride battery, a nickel cadmium battery, or a lithium based battery, such as a lithium cobalt, lithium iron phosphate, lithium titanate, or lithium polymer battery.
An aerosol-generating system may comprise an aerosol-generating device configured with a corresponding number of heating chambers housing aerosol-generating articles, and one or more aerosol-generating articles.
The invention provides a brand new aerosol generating system and a control method thereof, thereby avoiding excessive energy consumption of a temperature measuring element, simplifying circuit design, reducing cost and being suitable for an external heating aerosol generating device and an internal heating aerosol generating device at the same time.
Drawings
The foregoing summary, as well as the following detailed description of the patent, will be better understood when read in conjunction with the appended drawings. It is to be noted that the figures are only intended as examples of the claimed solution.
FIG. 1 is a schematic diagram of a heating circuit and a thermometry circuit in one embodiment;
FIG. 2 is a schematic diagram of a heating circuit and a thermometry circuit in another embodiment;
FIG. 3 is a schematic diagram of a heating circuit and a thermometry circuit in another embodiment;
fig. 4 is a schematic diagram of the process of charging and discharging the capacitor.
Detailed Description
The detailed features and advantages of the patent are described in detail below in the detailed description, which is sufficient for anyone skilled in the art to understand the technical content of the patent and to implement the patent, and the related objects and advantages of the patent can be easily understood by those skilled in the art from the description, the claims and the drawings disclosed in the specification.
It should be noted that in this specification, like reference numerals and letters refer to like items in the following drawings, and thus, once an item is defined in one drawing, it need not be further defined and explained in subsequent drawings.
In the description of the present embodiment, it should be noted that the terms "upper", "lower", "inner", "bottom", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the product conventionally places when used, and are only used for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be configured in a specific orientation, and operate, and thus, should not be construed as limiting the patent.
To make the objects, technical solutions and advantages of the present patent more clear, embodiments of the present patent will be described in further detail below with reference to the accompanying drawings.
This patent aim at provides a smoking set heater temperature detect method, can be applied to novel tobacco products fields such as electron cigarette, heating incombustible smoking set, charges through the temperature measurement return circuit to the electric capacity, and the voltage difference or the current change that measurement charging time or limited capacitor charge in the time unit, discharged is the purpose that realizes the temperature feedback. Specific embodiments of this solution are set forth in detail below:
in one embodiment, as shown in figure 1, the aerosol-generating system comprises an aerosol-generating substrate, a heating chamber, a power supply B1, a heater comprising at least one heating resistive element R11, a controller, an ADC unit (analogue to digital converter), a timer, a capacitor C1, a bidirectional electronic switch S11, an electronic switch S12 and a current limiting resistor R12.
The heating resistor element R11 has a characteristic that the resistance value changes with temperature, such as a positive temperature coefficient resistor element. After confirming the resistance value, the temperature can be estimated by the following formula:
R＝R0·(1+αT)
temperature measuring method 1
One specific method of measuring the temperature of the heating resistor element R11 includes the steps of:
-step 1: the bidirectional electronic switch S11 is closed upwards and the heating circuit comprising the power supply B1 and the heating resistive element R11 is in communication, the power supply B1 under control of the controller providing electrical power to the heating resistive element R11 to heat the aerosol-generating article.
-step 2: the bidirectional electronic switch S11 is closed downward while the electronic switch S12 is open, the temperature sensing circuit switches to a capacitor charging configuration comprising a power supply B1, a heating resistor element R11, and a capacitor C1, and a power supply B1 charges a capacitor C1.
Referring to the schematic diagram of the capacitor charging and discharging process of fig. 4, the voltage across the capacitor gradually increases with the charging time during charging, and the following formula is satisfied:
U＝E·(1-e-T/RC)
where U is the capacitor voltage, E equals the supply voltage, T represents the charging time, C is the capacitor, and R is the resistance in the RC circuit.
Thus, in one embodiment, the temperature of the heating resistor element R11 may be determined by monitoring the change in voltage or current across the capacitor C1 during charging, and further calculated. In another embodiment, instead of directly obtaining the temperature of the heater, a quantity related to the temperature of the heating resistance element may be used for temperature control or for temperature display.
In one embodiment, monitoring the voltage change of the capacitor C1 is implemented by a timer for measuring or defining the time unit length and an ADC unit for detecting the voltage change of the capacitor. The current limiting resistor is used for limiting the current discharged by the capacitor, so that the capacitor damage caused by the overlarge current discharged by the capacitor is avoided, and meanwhile, the danger caused by the misoperation of the electronic switch is ensured.
-step 3: the two-way electronic switch S11 closes upward and the heating circuit resumes operation. The electronic switch S12 is closed, the temperature measuring loop is switched to a capacitor discharge structure comprising a capacitor C1 and a current limiting resistor R12, the capacitor C1 starts to discharge, and the electric quantity in the capacitor is discharged.
-repeating steps 1-3.
Temperature measuring method two
Another specific method of measuring the temperature of the heating resistor element R11 includes the steps of:
-step 1: the bidirectional electronic switch S11 is closed upwards and the heating circuit comprising the power supply B1 and the heating resistive element R11 is in communication, the power supply B1 under control of the controller providing electrical power to the heating resistive element R11 to heat the aerosol-generating article.
-step 2: the bidirectional electronic switch S11 is closed downwards, the electronic switch S12 is closed at the same time, the temperature measuring circuit is switched to a capacitor charging structure comprising a power supply B1, a heating resistor element R11, a capacitor C1 and a current limiting resistor R12, the power supply B1 charges the capacitor C1, and the voltage of the capacitor C1 is equal to the divided voltage of the current limiting resistor R12.
-step 3: the two-way electronic switch S11 closes upward and the heating circuit resumes operation. The electronic switch S12 remains closed, the temperature sensing circuit switches to a capacitor discharge configuration including a capacitor C1 and a current limiting resistor R12, and the capacitor C1 begins to discharge, discharging the charge in the capacitor.
Referring to the schematic diagram of the capacitor charging and discharging process of fig. 4, the voltage across the capacitor gradually decreases with the charging time during discharging, and the following formula is satisfied:
U＝E·e-T/RC
where U is the capacitor voltage, E equals the supply voltage, T represents the charging time, C is the capacitor, and R is the resistance in the RC circuit.
Therefore, in one embodiment, the voltage division across the current limiting resistor R12 may be measured by monitoring the voltage change of the capacitor C1 during the discharge process, thereby calculating the resistance of the heating resistor element R11 and further calculating the temperature of the heating resistor element.
-repeating steps 1-3.
Temperature measuring method III
One specific method of measuring the temperature of the heating resistor element R11 includes the steps of:
-step 1: the bidirectional electronic switch S11 is closed upwards and the heating circuit comprising the power supply B1 and the heating resistive element R11 is in communication, the power supply B1 under control of the controller providing electrical power to the heating resistive element R11 to heat the aerosol-generating article.
-step 2: the bidirectional electronic switch S11 is closed downwards, the electronic switch S12 is opened at the same time, the timer starts to time, the temperature measuring circuit is switched to a capacitor charging structure comprising a power supply B1, a heating resistor element R11 and a capacitor C1, and the power supply B1 charges a capacitor C1.
-step 3: the bidirectional electronic switch S11 is closed upwards, the heating loop starts to work again, the timer stops timing, and the voltage at the two ends of the capacitor C1 is measured.
Referring to the schematic diagram of the capacitor charging and discharging process of fig. 4, the voltage across the capacitor gradually increases with the charging time during charging, and the following formula is satisfied:
U＝E·(1-e-T/RC)
where U is the capacitor voltage, E equals the supply voltage, T represents the charging time, C is the capacitor, and R is the resistance in the RC circuit.
Therefore, in one embodiment, the time may be counted during the charging process, and the voltage change of the capacitor C1 may be detected for a certain period of time, so as to measure the resistance of the heating resistor element R11, and further to calculate the temperature of the heating resistor element.
-step 4: electronic switch S12 is closed. The temperature measuring circuit is switched to a capacitor discharge structure comprising a capacitor C1 and a current limiting resistor R12, the capacitor C1 starts to discharge, and the electric quantity in the capacitor is discharged.
-repeating steps 1-4.
In another embodiment, as shown in figure 2, an aerosol-generating system comprises an aerosol-generating substrate, a heating chamber, a power supply B2, a heater comprising at least one heating resistive element R21, a controller, an ADC unit (not shown), a timer (not shown), a capacitor C1 and an electronic switch S21.
Temperature measuring method four
One specific method of measuring the temperature of the heating resistor element R21 includes the steps of:
-step 1: the electronic switch S21 is closed and the heating circuit comprising the power supply B2 and the heating resistive element R21 is in communication, the power supply B1 under the control of the controller providing electrical power to the heating resistive element R11 to heat the aerosol-generating article; the temperature measuring circuit is switched to form a capacitor charging structure comprising a power supply B2 and a capacitor C2, and the power supply B2 charges the capacitor C1.
-step 2: when the electronic switch S21 is turned on, the temperature measuring circuit is switched to a capacitor-capacitor structure comprising a heating resistor element R21 and a capacitor C2, and the capacitor C2 starts to discharge electricity to discharge the electricity in the capacitor.
The voltage change of the capacitor C1 can be monitored during the discharging process, so as to heat the resistance of the resistance element R21, and further calculate the temperature of the heating resistance element.
-repeating steps 1-2.
In one embodiment, as shown in figure 3, the aerosol-generating system comprises an aerosol-generating substrate, a heating chamber, a power supply B3, a heater comprising at least one heating resistive element R31, a controller, a sampling resistor R32, a first voltage measurement unit V1, a second voltage measurement unit V2 and a bidirectional electronic switch S31.
Temperature measuring method five
One specific method of measuring the temperature of the heating resistor element R31 includes the steps of:
-step 1: the bidirectional electronic switch S31 is closed upward and the heating circuit including the power source B3 and the heating resistive element R31 is in communication.
-step 2: the bidirectional electronic switch S31 is closed downwards to form a temperature measuring loop, and the temperature measuring loop comprises a power supply B3, a heating resistor element R31 and a sampling resistor R32. A voltage can be measured by the first voltage measuring unit V1, and a current can be measured by the second voltage measuring unit V2 and the sampling resistor R32, thereby obtaining a resistance value of the heating resistance element R31.
-repeating steps 1-2.
The terms and expressions which have been employed herein are used as terms of description and not of limitation. The use of such terms and expressions is not intended to exclude any equivalents of the features shown and described (or portions thereof), and it is recognized that various modifications may be made within the scope of the claims. Other modifications, variations, and alternatives are also possible. Accordingly, the claims should be looked to in order to cover all such equivalents.
Also, it should be noted that although the patent has been described with reference to the present specific embodiments, it should be understood by those skilled in the art that the above embodiments are only for illustrating the patent and that various equivalent changes or substitutions can be made without departing from the spirit of the patent, therefore, the changes and modifications of the above embodiments within the scope of the essential spirit of the patent will fall within the scope of the claims of the patent.
Claims (22)
1. An aerosol-generating system comprising: an aerosol-generating substrate, a heating chamber, a power source, a heater and a controller, wherein,
the heating chamber is for receiving, in operation, the aerosol-generating substrate;
the heater includes at least one heating resistor element having a resistance value that varies with temperature;
a heating circuit and a thermometry circuit may be configured within the aerosol-generating system;
the heating circuit comprises the power source and the heating resistive element, the power source providing electrical energy to the heating resistive element under control of a controller to heat the aerosol-generating article;
the temperature measuring circuit is used for measuring or utilizing a quantity related to the temperature of the heating resistance element;
the temperature measuring device is characterized in that when the temperature measuring device works, the controller controls the connection and disconnection of the heating loop and the temperature measuring loop.
2. An aerosol-generating system according to claim 1, wherein the power element in the heating circuit is only the heating resistance element when the heating circuit is in communication.
3. An aerosol-generating system according to claim 1, wherein the thermometry circuit comprises a capacitor.
4. An aerosol-generating system according to claim 3, wherein the thermometry circuit is selectively switchable between a capacitive charging configuration and a capacitive discharging configuration.
5. An aerosol-generating system according to claim 4, wherein the controller monitors a change in voltage or a change in current of the capacitor when the thermometry loop is switched to the capacitor charging configuration or the capacitor discharging configuration.
6. An aerosol-generating system according to claim 5, wherein the controller measures or utilises a quantity related to the temperature of the heating resistive element by monitoring the voltage or current change of the capacitance.
7. An aerosol-generating system according to claim 4, wherein the heating resistive element is in series with the capacitor when the temperature sensing circuit is switched to the capacitor charging configuration.
8. An aerosol-generating system according to claim 4, wherein the heating resistive element is connected in parallel with the capacitor when the temperature sensing circuit is switched to the capacitor charging configuration.
9. An aerosol-generating system according to claim 4, wherein the heating resistive element is disconnected from the capacitive discharge configuration when the temperature sensing circuit is switched to the capacitive discharge configuration.
10. An aerosol-generating system according to claim 4, wherein the heating resistive element is in series with the capacitor when the temperature sensing circuit is switched to the capacitive discharge configuration.
11. An aerosol-generating system according to claim 1, wherein the heating resistor element having a resistance that varies with temperature is a positive temperature coefficient resistor element.
12. A method of controlling an aerosol-generating system, the aerosol-generating system comprising: an aerosol-generating substrate, a heating chamber, a power source, a heater and a controller, wherein,
the heating chamber is for receiving, in operation, the aerosol-generating substrate;
the heater includes at least one heating resistor element having a resistance value that varies with temperature;
a heating circuit and a thermometry circuit may be configured within the aerosol-generating system;
the heating circuit comprises the power source and the heating resistive element, the power source providing electrical energy to the heating resistive element under control of a controller to heat the aerosol-generating article;
the temperature measuring circuit is used for measuring or utilizing a quantity related to the temperature of the heating resistance element;
characterized in that the control method of the aerosol-generating system comprises the steps of:
-controlling the heating circuit in communication with the controller;
-disconnecting the controller from controlling the heating circuit;
-communicating with the controller to control the thermometry loop;
-disconnecting the controller from controlling the thermometry loop.
13. A method of controlling an aerosol-generating system according to claim 12, wherein the heating circuit is connected such that the power element in the heating circuit is only the heating resistor element.
14. A method of controlling an aerosol-generating system according to claim 12, wherein the temperature sensing circuit comprises a capacitor when the heating circuit is in communication.
15. A method of controlling an aerosol-generating system according to claim 14, wherein the thermometric circuit is selectively switchable between a capacitive charging configuration and a capacitive discharging configuration, the method comprising the steps of:
-the thermometry loop is switched to the capacitive charging configuration;
-the thermometry loop is switched to the capacitive discharge configuration.
16. A method of controlling an aerosol-generating system according to claim 15, comprising the steps of:
-monitoring a voltage change or a current change of the capacitor when the temperature sensing circuit is switched to the capacitor charging configuration or the capacitor discharging configuration.
17. A method of controlling an aerosol-generating system according to claim 16, comprising the steps of:
-measuring or using a quantity related to the temperature of the heating resistive element by monitoring the voltage change or the current change of the capacitance.
18. A method of controlling an aerosol-generating system according to claim 16, wherein the heating resistor element is connected in series with the capacitor when the thermometric circuit is switched to the capacitive charging configuration, the method comprising the steps of:
-step 1: the heating loop is disconnected, the temperature measuring loop is switched to the capacitance charging structure,
-step 2: measuring or using a quantity related to the temperature of the heating resistance element by monitoring the voltage change or the current change of the capacitance,
-step 3: the heating loop is communicated, the temperature measuring loop is switched to the capacitance discharging structure,
-repeating steps 1-3;
or the control method of the aerosol-generating system comprises the steps of:
-step 1: the heating loop is disconnected, the temperature measuring loop is switched to the capacitance charging structure,
-step 2: the heating loop is communicated, the temperature measuring loop is switched to the capacitance discharging structure,
-step 3: measuring or using a quantity related to the temperature of the heating resistive element by monitoring the voltage change or the current change of the capacitance;
-repeating steps 1-3.
19. A method of controlling an aerosol-generating system according to claim 16, wherein the heating resistive element is connected in parallel with the capacitor when the thermometric circuit is switched to the capacitor charging configuration,
the control method of the aerosol-generating system comprises the steps of:
-step 1: the heating loop is communicated, the temperature measuring loop is switched to the capacitance charging structure,
-step 2: measuring or using a quantity related to the temperature of the heating resistance element by monitoring the voltage change or the current change of the capacitance,
-step 3: the heating loop is disconnected, the temperature measuring loop is switched to the capacitance discharging structure,
-repeating steps 1-3;
or the control method of the aerosol-generating system comprises the steps of:
-step 1: the heating loop is communicated, the temperature measuring loop is switched to the capacitance charging structure,
-step 2: the heating loop is disconnected, the temperature measuring loop is switched to the capacitance discharging structure,
-step 3: measuring or using a quantity related to the temperature of the heating resistance element by monitoring the voltage change or the current change of the capacitance,
-repeating steps 1-3.
20. A method of controlling an aerosol-generating system according to claim 16, wherein the heating resistive element is disconnected from the capacitive discharge configuration when the thermometric circuit is switched to the capacitive discharge configuration,
the control method of the aerosol-generating system comprises the steps of:
-step 1: the heating loop is communicated, the temperature measuring loop is switched to the capacitance charging structure,
-step 2: measuring or using a quantity related to the temperature of the heating resistance element by monitoring the voltage change or the current change of the capacitance,
-step 3: the heating loop is kept communicated, the temperature measuring loop is switched to the capacitance discharging structure,
-repeating steps 1-3;
or the control method of the aerosol-generating system comprises the steps of:
-step 1: the heating loop is communicated, the temperature measuring loop is switched to the capacitance charging structure,
-step 2: the heating loop is kept communicated, the temperature measuring loop is switched to the capacitance discharging structure,
-step 3: measuring or using a quantity related to the temperature of the heating resistance element by monitoring the voltage change or the current change of the capacitance,
-repeating steps 1-3.
21. A method of controlling an aerosol-generating system according to claim 16, wherein the heating resistive element is in series with the capacitor when the thermometric circuit is switched to the capacitor discharge configuration,
the control method of the aerosol-generating system comprises the steps of:
-step 1: the heating loop is communicated, the temperature measuring loop is switched to the capacitance charging structure,
-step 2: measuring or using a quantity related to the temperature of the heating resistance element by monitoring the voltage change or the current change of the capacitance,
-step 3: the heating loop is disconnected, the temperature measuring loop is switched to the capacitance discharging structure,
-repeating steps 1-3;
or the control method of the aerosol-generating system comprises the steps of:
-step 1: the heating loop is communicated, the temperature measuring loop is switched to the capacitance charging structure,
-step 2: the heating loop is disconnected, the temperature measuring loop is switched to the capacitance discharging structure,
-step 3: measuring or using a quantity related to the temperature of the heating resistance element by monitoring the voltage change or the current change of the capacitance,
-repeating steps 1-3.
22. A method of controlling an aerosol-generating system according to claim 12, wherein the heating resistor element having a resistance that varies with temperature is a positive temperature coefficient resistor element.
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