CN110025048A - The releasing control method of electric heating Smoke-generating System and volatile compound - Google Patents
The releasing control method of electric heating Smoke-generating System and volatile compound Download PDFInfo
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- CN110025048A CN110025048A CN201910263795.8A CN201910263795A CN110025048A CN 110025048 A CN110025048 A CN 110025048A CN 201910263795 A CN201910263795 A CN 201910263795A CN 110025048 A CN110025048 A CN 110025048A
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- 238000000034 method Methods 0.000 title abstract description 51
- 238000005485 electric heating Methods 0.000 title abstract description 10
- 239000003039 volatile agent Substances 0.000 title description 9
- 238000010438 heat treatment Methods 0.000 claims abstract description 229
- 238000001514 detection method Methods 0.000 claims abstract description 93
- 230000000391 smoking effect Effects 0.000 claims description 55
- 239000000758 substrate Substances 0.000 claims description 45
- 230000001276 controlling effect Effects 0.000 claims description 33
- 150000001875 compounds Chemical class 0.000 claims description 30
- 239000003990 capacitor Substances 0.000 claims description 16
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- 230000001105 regulatory effect Effects 0.000 claims description 4
- 230000009467 reduction Effects 0.000 claims description 3
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- 238000010586 diagram Methods 0.000 description 4
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- 229910001120 nichrome Inorganic materials 0.000 description 3
- 239000000779 smoke Substances 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- -1 cellucotton Substances 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 239000003571 electronic cigarette Substances 0.000 description 2
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- 239000011148 porous material Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 235000015515 Achlys triphylla Nutrition 0.000 description 1
- 229910000604 Ferrochrome Inorganic materials 0.000 description 1
- 229910001374 Invar Inorganic materials 0.000 description 1
- 102100035181 Plastin-1 Human genes 0.000 description 1
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- 235000019504 cigarettes Nutrition 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
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Classifications
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- A24F47/008—
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- Control Of Resistance Heating (AREA)
Abstract
The present invention proposes a kind of electric heating Smoke-generating System, comprising: detection module, for measuring the working condition of heating element；Electric energy adjusts module, exports for adjusting power supply to the electric energy of heating element；Control module for controlling the working condition of detection module measurement heating element, and adjusts module adjustment power supply according to the working state control electric energy of measurement and exports to the electric energy of heating element；Detection module and power conditioning module are configured as according to certain frequency alternate run.The above electric heating Smoke-generating System of the invention, by the real-time acquisition of heating element working condition and correspondence is adjusted to the power supply electric energy of heating element, and collection process and electric energy supply process time-sharing multiplex, the hardware module adjusted with electric energy supply be will test respectively according to certain frequency alternate run, on the one hand hardware configuration is enormously simplified, on the other hand eliminates and reduce mutual interference.
Description
Technical Field
The embodiment of the invention relates to the field of an electric heating smoking system, in particular to an electric heating smoking system and a release control method of a volatile compound.
Background
The electrically heated smoking system is a type of electronic cigarette product that generates an aerosol for smoking by heating volatile compounds. The electric heating smoking system generally needs to monitor the real-time temperature of the heating component and control the working power of the heating component according to the temperature, so as to ensure that the real-time temperature of the heating component is in a preset range.
At present, two methods are generally adopted for monitoring real-time temperature, one method is to arrange an independent temperature sensor and realize constant temperature control by acquiring real-time temperature information through the temperature sensor; the other is the resistivity method proposed in the fimbrin 200980110074.8 patent, which derives and acquires real-time temperature information according to the real-time resistivity of the heating element during operation, and then performs control.
In the above two real-time modes, sensing the temperature by using the temperature sensor structurally increases the hardware cost and the assembly difficulty of the product, and thus is less adopted. The real-time temperature is generally obtained by using the resistivity change of the heating element, and in this way, the resistivity monitoring is detected by a standard voltage dividing resistor; however, in the detection process, factors such as the output voltage, the load, the current and the like of the battery are all in a changing state, so that the monitoring becomes complicated, and the accuracy of the result is influenced.
Disclosure of Invention
In order to solve the problem of temperature sensing and control of an electrically heated smoking system in the prior art, embodiments of the present invention provide a method for more conveniently and accurately controlling the release of volatile compounds in an electrically heated smoking system.
The invention provides a method of controlling the release of volatile compounds from an electrically heated smoking system comprising a power supply, at least one heating element connected to the power supply for heating an aerosol-generating substrate; wherein the aerosol-generating substrate releases a plurality of volatile compounds upon heating; the method comprises the following steps:
controlling the electrical energy provided by the power source to the at least one heating element to prevent the release of at least one volatile compound from the aerosol-generating substrate, the controlling step comprising:
providing a constant sensing current to the at least one heating element;
measuring a voltage value of the at least one heating element at the detection current;
comparing the measured voltage value with a preset voltage threshold value; and the number of the first and second groups,
adjusting the power supplied to the at least one heating element to keep the voltage value of the at least one heating element at the detection current below a preset voltage threshold value.
Preferably, the step of controlling the power supplied by the power source to the at least one heating element to prevent the release of the at least one volatile compound further comprises:
the voltage threshold value corresponding to the current value of the detection current of the at least one heating element is predetermined.
Preferably, the predetermining a corresponding voltage threshold of the at least one heating element at the current value of the detection current comprises:
calculating the resistance value of the at least one heating element corresponding to the highest operating temperature value according to the preset highest operating temperature value of the at least one heating element; wherein the predetermined maximum operating temperature value is below a minimum release temperature of at least one of the volatile compounds;
and calculating a corresponding voltage threshold value under the current value of the detection current according to the resistance value of the at least one heating element corresponding to the highest operation temperature value and the current value of the detection current.
Preferably, the step of adjusting the power supplied to the at least one heating element so that the voltage value of the at least one heating element at the detected current is kept below a preset voltage threshold value comprises:
adjusting a duty cycle of the power supplied to the at least one heating element to maintain a voltage value of the at least one heating element at the detected current below a preset voltage threshold.
Preferably, the control power source interrupts the supply of electrical energy to the at least one heating element when the measured voltage value is greater than the voltage threshold value; controlling the power supply to maintain the supply of electrical energy to the at least one heating element when the measured voltage value is less than or equal to the voltage threshold value.
Preferably, the step of adjusting the power supplied to the at least one heating element so that the voltage value of the at least one heating element at the detected current is kept below a preset voltage threshold value comprises:
and adjusting the voltage value of the power supply for supplying power to the at least one heating element so as to keep the voltage value of the at least one heating element under the detection current below a preset voltage threshold value.
Preferably, the adjusting the voltage value of the power supply supplying the electric energy to the at least one heating element to keep the voltage value of the at least one heating element under the detection current within a range below a preset voltage threshold value comprises:
decreasing the voltage at which electrical energy is supplied to the at least one heating element when the measured voltage value is greater than the upper limit of the range;
increasing the voltage at which electrical energy is supplied to the at least one heating element when the measured voltage value is less than the lower limit of the range.
Preferably, the control power supply intermittently supplies a constant detection current to the at least one heating element and measures a voltage value of the at least one heating element at the detection current, and the control step is performed at a frequency of 100 to 1000 Hz.
The invention also provides a method of controlling the release of volatile compounds from an electrically heated smoking system comprising a power supply, at least one heating element connected to the power supply for heating an aerosol-generating substrate; wherein the aerosol-generating substrate releases a plurality of volatile compounds upon heating; the method comprises the following steps:
maintaining the working current of the at least one heating element to be constant;
controlling the voltage supplied by the power source to the at least one heating element to prevent release of at least one volatile compound from the aerosol-generating substrate; the control step includes:
measuring an operating voltage value of the at least one heating element;
comparing the measured working voltage value with a preset voltage threshold value; and the number of the first and second groups,
adjusting the voltage supplied to the at least one heating element to maintain the operating voltage of the at least one heating element below a preset voltage threshold.
The invention also provides a method of controlling the release of volatile compounds from an electrically heated smoking system comprising a power supply, at least one heating element connected to the power supply for heating an aerosol-generating substrate; wherein the aerosol-generating substrate releases a plurality of volatile compounds upon heating; the method comprises the following steps:
controlling the electrical energy provided by the power source to the at least one heating element to prevent the release of at least one volatile compound from the aerosol-generating substrate, the controlling step comprising:
controlling a power supply to supply a constant current to the at least one heating element during a first period of time, and measuring a voltage value of the at least one heating element at the detected current; comparing the measured voltage value with a preset voltage threshold value; and the number of the first and second groups,
adjusting the electric energy output by the power supply to the at least one heating element in a second time period to keep the voltage value of the at least one heating element under the detection current below a preset voltage threshold value;
the control steps in the first time interval and the second time interval are executed alternately according to a certain frequency.
Based on the above method, the invention also proposes an electrically heated smoking system comprising a power supply, at least one heating element connected to the power supply for heating the aerosol-generating substrate; wherein the aerosol-generating substrate releases a plurality of volatile compounds upon heating; the electrically heated smoking system further comprises:
the constant current detection module is used for providing constant current to the heating element and measuring the voltage value of the two ends of the heating element under the constant current;
the electric energy adjusting module is used for adjusting the electric energy output by the power supply to the heating element;
and the control module is used for comparing the measured voltage value with a preset voltage threshold value and controlling the electric energy adjusting module to adjust the electric energy output by the power supply to the heating element according to the comparison result so that the voltage value of the at least one heating element under the constant current is kept below the preset voltage threshold value.
According to the electric heating smoking system and the control method thereof, the whole process does not involve the detection and conversion of temperature, only the voltage value under the constant current is detected, the electric energy output to the heating element is correspondingly adjusted, and the voltage value is kept at the threshold value, so that the good control of the working state of the electric heating smoking system can be realized; the temperature evaluation of the controller with limited computing resources is simplified, the measurement and calculation of current factors are reduced, and the accuracy of results is improved while the hardware structure is simplified.
Based on another control, the invention also provides a further electrically heated smoking system, characterised in that the electrically heated smoking system comprises a power supply, at least one heating element connected to the power supply for heating the aerosol-generating substrate; wherein the aerosol-generating substrate releases a plurality of volatile compounds upon heating; the electrically heated smoking system further comprises:
the detection module is used for measuring the working state of the heating element;
the electric energy adjusting module is used for adjusting the electric energy output by the power supply to the heating element;
the control module is used for controlling the detection module to measure the working state of the heating element and controlling the electric energy adjusting module to adjust the electric energy output by the power supply to the heating element according to the measured working state;
the detection module and the power regulating module are configured to alternately operate at a certain frequency.
Preferably, the operating state of the heating element includes at least one of an operating voltage value, an operating current value, a real-time resistance value, a real-time resistivity coefficient, or an operating temperature of the heating element.
Preferably, the detection module comprises an electrical input end, a signal detection end, a controlled end and a signal output end; the electric input end is connected with a power supply, the signal detection end is connected with the heating element, and the controlled end and the signal output end are both connected with the control module;
the electric energy adjusting module comprises an electric energy input end, an electric energy output end and a controlled end; the electric energy input end is connected with the power supply, the electric energy output end is connected with the heating element, and the controlled end is connected with the control module.
Preferably, the electrically heated smoking system further comprises:
the first switch is used for controlling the power supply to supply power to the detection module; the electrical input end of the detection module is connected with the power supply through the first switch.
Preferably, the electric energy adjusting module comprises a second switch, one end of the second switch is connected with the power supply, the other end of the second switch is connected with the heating element, and the electric energy output to the heating element by the power supply is adjusted through the on-off of the second switch; the second switch is configured to open when the measured value of the voltage across the heating element is above a preset voltage threshold.
Preferably, the first switch and the second switch are configured to be alternately turned on at a certain frequency, so that the detection module and the power regulation module alternately operate at a certain frequency.
Preferably, the detection module comprises:
the constant current conversion unit is used for converting the output voltage of the power supply into a constant current and outputting the constant current to the heating element;
and the voltage detection unit is used for measuring the voltage value of the two ends of the heating element under the constant current.
Preferably, the constant current conversion unit comprises a voltage stabilizer, a first resistor, a first capacitor and a second capacitor;
the voltage stabilizer is provided with a voltage input end, a voltage output end and a common connecting end, and the voltage input end is connected with the power supply; one end of the first resistor is connected with the voltage output end, and the other end of the first resistor is connected with the common connecting end;
one end of the first capacitor is connected with the voltage input end, and the other end of the first capacitor is connected with the common connecting end; one end of the second capacitor is connected with the voltage output end, and the other end of the second capacitor is connected with the common connecting end.
Preferably, the voltage detection unit includes an amplifier having a controlled terminal, a voltage detection terminal, and a signal output terminal; wherein,
the controlled end is connected with the control module, the voltage detection end is connected with the heating element, and the signal output end is connected with the control module.
Preferably, the power adjusting module includes:
the voltage boosting unit is used for boosting the power supply voltage of the power supply to the heating element when the measured voltage value at the two ends of the heating element is lower than a preset voltage threshold range;
a voltage reduction unit; and the voltage control circuit is used for reducing the power supply voltage of the power supply to the heating element when the measured voltage value of the two ends of the heating element is higher than a preset voltage threshold range.
Above electrical heating system of being fuming adopts the hardware module that will detect and electric energy supply adjusts to operate according to certain frequency in turn respectively, has simplified hardware structure on the one hand greatly, and on the other hand eliminates and has reduced mutual interference.
Drawings
One or more embodiments are illustrated by way of example in the accompanying drawings, which correspond to the figures in which like reference numerals refer to similar elements and which are not to scale unless otherwise specified.
FIG. 1 is a schematic view of an electrically heated smoking system according to an embodiment;
FIG. 2 is a graph of voltage versus temperature for a nichrome heating element at current 4A;
FIG. 3 is a schematic flow diagram of a method for controlling the release of volatile compounds from an electrically heated smoking system according to one embodiment;
FIG. 4 is a block circuit diagram of a release control device for volatile compounds in an electrically heated smoking system according to one embodiment;
FIG. 5 is a schematic diagram of the constant current detection module of FIG. 4;
FIG. 6 is an electrical schematic of the release control device for the volatile compounds in the electrically heated smoking system of the embodiment of FIG. 4;
fig. 7 is a block circuit diagram of a release control device for a volatile compound in a further embodiment of an electrically heated smoking system.
Detailed Description
In order to facilitate an understanding of the invention, the invention is described in more detail below with reference to the accompanying drawings and detailed description.
The invention provides a method for controlling the release of volatile compounds in an electrically heated smoking system; based on an electrically heated smoking system, the system structure of which can be seen in fig. 1 in one embodiment, comprises a power supply means 10, at least one heating element 20 connected to the power supply means 10, and an aerosol-generating substrate 30; the heating element 20 is used to heat the aerosol-generating substrate 30 so as to release a plurality of volatile compounds, and these volatile compounds are formed by the heating process alone. Wherein each of the plurality of volatile compounds has a minimum release temperature above which the volatile compound is released. For the convenience of product use, the system further comprises a controller 40 for controlling the power output from the power supply unit 10 to the heating element 20.
The method according to the invention comprises the steps of selecting a voltage threshold at a preset current value at which such preset operating voltage ensures that the operating temperature of the heating element 20 is above the minimum release temperature of at least one of the plurality of volatile compounds, so as to prevent its release from the aerosol-forming substrate; and to maintain the operating temperature within a relatively suitable range, to prevent the aerosol-generating substrate 30 from gelling, volatile compounds from being unstable, and the like, due to the high temperatures that exceed a certain level.
The selection of the voltage threshold at the above preset current value of the present invention is based on the operating voltage of the heating element 20 at which the operating temperature is reflected. Specifically, the voltage value V at both ends of the heating element 20 when operating is R × I, R is the actual resistance of the heating element 20, and I is a set known current value; the value of the voltage V across the heating element 20 at this current value thus depends on the actual resistance R of the heating element 20. The actual resistance R, in turn, depends on the material and shape configuration of the heating element 20 itself and the real-time temperature and is represented by the following relationship: r ═ ρ (T) × L/S, and ρ (T) ═ ρ0×(1+α1T+α2T2). Whereas for a heating element 20 that has been manufactured according to the structural shape, the length L and the cross-sectional area S are fixed and can be detected, the reference resistivity ρ0Is fixed and p (T) may be based on a reference resistivity p0And temperatureDegree T related polynomial coefficient α1And α2And (6) calculating. Thus, the relationship between the voltage across the heating element 20 and the temperature at a known current value I is derived as follows:
V＝ρ0×(1+α1T+α2T2) xLxI/S, the variables in the relation are only voltage V and temperature T. This relationship may be tested for a selected heating element 20, such as the heating element 20 of nichrome having a 0.8 ohm resistance at room temperature illustrated in fig. 2 by the voltage and temperature curves for a constant current of 4A.
Further, the present invention is based on controlling the release of volatile compounds from the aerosol-generating substrate upon heating, employing estimating the upper voltage threshold from the operating temperature of the selected heating element 20 being below a maximum operating temperature, where the maximum operating temperature is below a minimum release temperature of at least one of the volatile compounds, so as to prevent its release from the aerosol-generating substrate; thus preventing the volatilization of harmful volatile compounds above this maximum operating temperature during smoking. Also, it should be noted that for different brands or amounts of aerosol-generating substrate, the maximum operating temperature selected may not be the same, since the volatile compound composition may not be the same for different brands and amounts of aerosol-generating substrate, and therefore, in different scenarios, the predetermined voltage threshold for the heating element 20 may be calculated accordingly for different maximum operating temperatures.
Of course, in order to make the correlation more accurate, the heating element 20 is made of a material having a strong correlation between resistance and temperature, such as nichrome, invar, ferrochrome; it is more accurate and stable to derive the actual operating temperature of the heating element 20 by using a strong correlation with the voltage across the heating element 20 under constant current operation.
Further, the heating element 20 of the electrically heated smoking system of figure 1 above is in the form of a heating pin or rod extending through the centre of the aerosol-generating substrate 30, and may preferably be made of a material having a strong resistance temperature dependence as described above. In other embodiments, the heating element 20 is formed by depositing the above materials on a rigid carrier material, such as nickel coated on a ceramic substrate to form the heating element 20. Or in other embodiments, tubular heating elements with elongated receiving cavities made of the above materials are also suitable heating elements.
Further, the control method of the present invention further comprises the steps of: controlling the power supply means 10 to supply electrical energy to the at least one heating element 20 causes the at least one heating element 20 to generate heat to heat the aerosol-generating substrate 30 while preventing at least one of the harmful volatile compounds therein from being released. This control step can be seen in fig. 3, and includes:
s10, supplying a detection current to the heating element 20, wherein the detection current is a constant current and has a current value above a preset current value;
s20, measuring the voltage value across at least one heating element 20 under the detected current;
s30, comparing the measured voltage value with a preset voltage threshold value;
s40, adjusting the power supplied to the at least one heating element 20 to keep the voltage value of the at least one heating element 20 under the detected current below the preset voltage threshold.
In the invention, when the heating element 20 works, a constant current is used as a detection current, voltage values at two ends of the heating element 20 are detected after the detection current is supplied to the heating element 20, a real-time voltage value at two ends of the heating element 20 under the constant current is compared with a preset voltage threshold, and the voltage is kept below the preset voltage threshold through the control of electric energy. Based on the above description of the preset voltage threshold, it is associated with ensuring that the heating element 20 is in the desired operating state; a good control of the operating state of the heating element 20 can then be achieved by adjusting the electrical energy supplied to the at least one heating element 20 such that the voltage at the detected current remains within a predetermined voltage threshold range. Moreover, as can be seen from the steps and the internal mechanism of the above method, the whole control and detection process does not involve the detection and conversion of the temperature, but only detects the voltage value under the constant current and correspondingly adjusts the electric energy output to the heating element 20 to keep the voltage value at the threshold value, so that the good control of the working state of the electric heating smoking system can be realized.
It should be noted that, according to the control requirement of the operating state of the heating element, the predetermined voltage threshold of the heating element of the present invention may be a determined point value in most cases, so as to achieve more precise control of the operating state of the heating element 20; in more implementations, the process of control is allowed to have some error or fluctuation, so the voltage threshold may be expanded to be within a range of intervals below the voltage threshold.
Of course, the above-mentioned operation based on the preset voltage threshold is performed based on a known current value originally set, so that the constant current when the originally preset voltage threshold is selected also needs to be the same in the detection process, and therefore, the current value of a detection current supplied to the heating element 20 is set to the current value when the voltage threshold is set in the step S10.
Further, in order to make the above method smooth in implementation, the electrically heated smoking system of the embodiment of fig. 1 of the present invention may be implemented by adding a constant current module 41 to the hardware portion of the controller 40 for converting the voltage output by the power supply device 10 into a constant current to be supplied to the heating element 20 when the above detection steps S10-S20 are performed. In implementation, when the number of loads and the resistance value of the circuit structure in the electric heating smoking system are controllable, the above constant current module 41 may be further integrated on the power supply device 10, and the power supply device 10 is implemented by using a constant current power supply, so that the current output to the heating element 20 is kept constant.
Or in another preferred embodiment, the electrically heated smoking system further comprises other hardware structures for controlling, monitoring and the like connected in series/parallel with the heating element 20, and therefore, usually based on the optimized selection of the electronic hardware structure, the constant current module 41 may be implemented in an embodiment by using a current regulator (CCR) for providing the output detection current during the control process, so as to ensure that the current is always kept constant.
Further, the voltage value of the heating element 20 at both ends under the detection current is changed by the adjustment of the supply of the electric power to the heating element 20 in step S40; here, the electric energy can be adjusted in two ways:
one way consists in increasing the duty cycle of the power supply when the measured value of the voltage across the heating element 20 is lower than a preset voltage threshold range, by adjusting the duty cycle of the power supply; when the measured voltage across the heating element 20 is higher than the predetermined voltage threshold range, the duty cycle of the power supply is reduced. The adjustment of the specific duty ratio may be controlled such that the control power source 10 interrupts the supply of electric power to the at least one heating element 20 when the measured voltage value is greater than a preset voltage threshold value; when the measured voltage value is less than or equal to the voltage threshold value, the control power source 10 maintains the supply of electric power to the at least one heating element 20.
In another way, by adjusting the voltage of the supplied electric energy, when the measured voltage value across the heating element 20 is lower than the preset voltage threshold range, the voltage supplied to the two terminals of the heating element 20 is boosted by using a boost circuit or the like; when the measured voltage value across the heating element 20 is higher than the preset voltage threshold range, the voltage supplied across the heating element 20 is reduced by using a voltage reduction circuit or the like.
According to the present invention, the accurate control of the heating element 20 during smoking is performed, the above control steps S10-S20 are performed at a frequency of 100-1000 Hz during user smoking.
Based on the same idea of the invention, another control method is also provided in the implementation, which comprises the following steps:
s10a, keeping the working current of the heating element 20 as a constant current;
s20a, measuring the operating voltage value across at least one heating element 20;
s30a, comparing the measured voltage value with a preset voltage threshold range;
s40a, adjusting the power supplied to the at least one heating element 20 to keep the voltage value of the at least one heating element 20 under the detected current below the preset voltage threshold range.
In this modified embodiment, compared with the above embodiment, if the heating element 20 is kept operating under a constant current during the smoking of the electronic cigarette by the user, the step of providing the detection current by the switching circuit is not required in the control process, and the voltage value under the operating current is directly measured and compared to control. In implementation, the current output by the power supply device 10 through the constant current module 41 needs to be converted into a constant current and then output, so that the whole control process is more convenient. In the control process, the detection and control processes are executed according to the frequency of 100-1000 Hz.
Based on the content of the method for controlling the release of volatile compounds in the electrically heated smoking system, the invention further provides an electrically heated smoking system for implementing the method, and the structure of the electrically heated smoking system is shown in fig. 4 in one embodiment; the method comprises the following steps: the device comprises a controller 100, a constant current detection module 200 and an electric energy adjusting module 300, wherein the constant current detection module 200 and the electric energy adjusting module 300 are connected with the controller 100; wherein,
the constant current detection module 200 is configured to convert an output voltage of the power supply device 10 into a constant current and output the constant current to the heating element 20, and measure a working voltage value at two ends of the heating element 20;
a power adjusting module 300 for adjusting the power output to the heating element 20;
and the controller 100 is configured to compare the working voltage value at the two ends of the heating element 20 measured by the constant current detection module 200 with a preset voltage threshold range, and control the electric energy adjustment module 300 to output the electric energy to the heating element 20 according to the operation result.
Based on the implementation of the above functions, detailed circuit structures of the constant current detection module 200 and the power adjustment module 300 are shown in fig. 5 and 6; the constant current detection module 200 includes a constant current conversion unit 210 and a voltage detection unit 220; wherein,
the constant current conversion unit 210 comprises a voltage regulator U1 and a first resistor R1, wherein the voltage regulator U1 is provided with an input end, an output end and a common connection end; wherein the input end is connected with the power supply device 10, the output end is connected with one end of a first resistor R1, and the common connection end is connected with the other end of a first resistor R1; functionally, the output voltage of the power supply 10 is regulated to a constant voltage by the regulator U1, and then converted to a constant current by the first resistor R1 and output to the heating element 20.
Further, in order to improve the current stabilizing performance and the accuracy effect of the constant current converting unit 210, the constant current converting unit 210 further includes a first capacitor C1 and a second capacitor C2. Wherein,
a first capacitor C1 is connected to the input of the regulator U1 at one end and to the common connection of the regulator U1 at the other end, and is used to filter the voltage input of the power supply apparatus 10; one end of the second capacitor C2 is connected with the output end of the voltage stabilizer U1, and the other end is connected with the common connection end of the voltage stabilizer U1, and is used for filtering the output constant current.
The voltage detection unit 220 mainly includes an amplifier U2, the amplifier U2 has a controlled terminal, a detection terminal and an output terminal, wherein the detection terminal is connected to the heating element 20, and the output terminal is connected to the controller 100 through a second resistor R2, for feeding back the acquired voltage value of the heating element 20 to the controller 100 for comparison operation. The controlled terminal of the amplifier U2 is connected to a control pin of the controller 100 through the first transistor Q1, so that the controller 100 controls the operation of the entire voltage detection unit 220 by controlling the on/off of the first transistor Q1.
The power adjusting module 300 is configured as shown in fig. 6, and includes a second transistor Q2, the second transistor Q2 is used as a switch, and the connection mode is that the emitter of the second transistor Q2 is connected to the power supply device 10, the base is connected to a control pin of the controller 100, and the collector is connected to the heating element 20; the controller 100 controls the power to the heating element 20 by controlling the switching of the second transistor Q2.
Based on the above description, the overall principle of the electrically heated smoking system is as follows: the second transistor Q2 is controlled by the controller 100 as a control switch regulator U1 that outputs power from the main power supply 10 to the heating element 20, the first resistor R1 and the amplifier U2 form a constant current detection module 200, and the first transistor Q1 is used as a power supply switch of the constant current detection module 200.
When the device is in operation, the flow is mainly controlled according to two working processes of a detection mode and an output mode, and the method comprises the following steps:
s1, the controller 100 turns off the second transistor Q2, turns on the first transistor Q1, starts the constant current detection module 200, and detects the voltage value at the two terminals AB of the heating element 20;
s2, the controller 100 obtains the voltage value (i.e. Io _ Ad signal in the figure) fed back by the output end of the amplifier U2, and compares the voltage value with the stored preset voltage threshold range; if the voltage is smaller than the voltage threshold range, outputting a high level signal to turn on the second triode Q2, so that the main power supply device 10 outputs power to the heating element 20 to raise the heating temperature, and simultaneously turning off the first triode Q1; if the voltage value is greater than the voltage threshold range, a low level signal is output to turn off the second transistor Q2, and the constant current detection module 200 is continuously controlled to detect the voltage value across the terminal AB of the heating element 20 until the voltage value is less than the voltage threshold range.
Meanwhile, according to the above circuit structure design of the present invention, the detection process and the power adjustment output process are time-division multiplexed and not performed simultaneously by the controller 100, that is, the process of causing the power supply 10 to output the detection current when the constant current detection module 200 operates and the process of adjusting the power supply 10 to output the power to the heating element 20 when the power adjustment module 300 operates are performed alternately and not simultaneously; and according to the above method, the detection frequency or the alternate execution frequency is preferably set to 100 to 1000 Hz. On the one hand, the simplification of the hardware structure can be facilitated, and on the other hand, the mutual interference of the two related functional modules when executed simultaneously can be avoided.
In the above embodiment, the current output to the heating element 20 is made constant by using the preferable constant current conversion unit 210, i.e., the current stabilizer; in other embodiments, the power supply device 10 may be configured to output a constant current power supply in a state where the load of the entire circuit configuration is accurately controlled, and the constant current converting unit 210 may be simplified in circuit configuration.
Of course, based on the above switching functions of the first transistor Q1 and the second transistor Q2, a skilled person can simply replace them with N-MOS transistors in practice.
The switch of the second transistor Q2 based on the above embodiment is embodied as the simplest power adjustment module 300, which adjusts the time for which the power is output to the heating element 20 by the on or off state of the second transistor Q2, turns off the second transistor Q2 to reduce the power output from the power supply 10 to the heating element 20 when the measured voltage value is higher than the preset threshold, and turns on the second transistor Q2 to increase the power output from the power supply 10 to the heating element 20 when the measured voltage value is lower than the preset threshold, thereby ensuring that the voltage value of the amount of the heating element 20 is maintained at the preset threshold, and thus controlling the temperature of the heating element 20. In another more precise manner, the power adjusting module 300 may be adopted to further reduce the temperature thereof by raising or lowering the voltage supplied by the heating element 20 at a constant current, in particular, by lowering the voltage supplied by the power supply 10 to the heating element 20 by means of the voltage reducer when the measured operating voltage is higher than a preset voltage threshold; when the measured operating voltage is lower than a preset voltage threshold, the power supply voltage of the power supply 10 to the heating element 20 is boosted by the booster, thereby raising the temperature thereof; the heating power of the heating element 20 can thus be varied to adjust its actual operating temperature to within the preset temperature threshold. Meanwhile, the above booster and the step-down transformer may be replaced with a circuit module or a software module having the same function.
Based on the above idea of performing the detection process and the power adjustment control process of the heating element 20 alternately in the hardware design of the electrically heated smoking system, the embodiment of the present invention further provides another control method, including:
s10b, controlling the power source 10 to provide the detecting current to the heating element 20 in the first period, wherein the detecting current is a constant current and the current value is the above preset current value; and measuring a voltage value across the at least one heating element 20 at the detected current and comparing the measured voltage value with a preset voltage threshold;
s20b, adjusting the power output from the power source 10 to the at least one heating element 20 during the second period of time, so that the voltage value of the at least one heating element 20 under the detected current is maintained at the preset voltage threshold;
and, the steps in which the power source 10 supplies the detection current and outputs the electric power to the heating element 20 in the above step S10b and step S20b are alternately performed.
Meanwhile, in the alternative execution mode, the embodiment of the present invention further provides another control method step, including:
s10c, keeping the working current of the heating element 20 as a constant current;
s20c, measuring the operating voltage value across at least one heating element 20 during a first time period, and comparing the measured voltage value with a preset voltage threshold range;
s30c, adjusting the voltage supplied by the power source 10 to the at least one heating element 20 during the second period of time, so as to maintain the operating voltage of the at least one heating element 20 at the preset voltage threshold;
wherein the detection process in the first period of step S20c and the power adjustment process in the second period of step S30c are alternately performed at the above-described frequency.
Based on the above hardware structure of the electrically heated smoke generating system, the embodiment of the present invention further provides another electrically heated smoke generating system, which adopts the above mode of alternately operating according to a certain frequency, and further provides more operating state detection modules and power supply adjustment for the whole heating element 20. The difference in hardware structure from the above embodiment is that, as shown in fig. 7, the method includes:
a detection module 200a for measuring the operating state of the heating element 20;
the electric energy adjusting module 300a is used for adjusting the electric energy output by the power supply to the heating element;
the controller 100a is used for controlling the detection module 200a to measure the working state of the heating element 20 and controlling the power adjustment module 300a to adjust the power output by the power supply to the heating element 20 according to the measured working state;
of course, based on the description of the above embodiments and the conventional hardware connection manner, the detection module 200a includes an electrical input terminal, a voltage detection terminal, a controlled terminal, and a signal output terminal; wherein, the electrical input end is connected with the power supply, the voltage detection end is connected with the heating element 20, and the controlled end and the signal output end are both connected with the control module 100 a;
the power adjustment module 300a also has a power input terminal, a power output terminal and a controlled terminal; wherein, the power input end is connected with the power supply, the power output end is connected with the heating element 20, and the controlled end is connected with the controller 100 a;
the detection module 200a and the power adjustment module 300a are respectively operated under the control of the controller 100a to perform their respective functions, and are configured to alternately operate at a certain frequency.
And in more extended implementations of the above voltage detection, the operating state of the heating element 20 detected by the detection module 200a in this embodiment may include at least one of an operating voltage value, an operating current value, a real-time resistance value, a real-time resistivity coefficient, or an operating temperature.
In the same manner, the same switches as the first transistor Q1 and the second transistor Q2 are respectively used for the detection module 200a and the power adjustment module 300a to alternately switch on the first transistor Q1 and the second transistor Q2 according to a certain frequency, so that the detection module 200a and the power adjustment module 300a alternately operate according to a certain frequency. On the one hand, the simplification of the hardware structure can be facilitated, and on the other hand, the mutual interference of the two related functional modules when executed simultaneously can be avoided.
On the basis of the above embodiment of the invention, the invention further provides an electrically heated smoking system. Also, in conjunction with the general contents of the product, the aerosol-generating substrate 30 employed is preferably a tobacco-containing material that releases volatile compounds from the substrate upon heating; or may be a non-tobacco material that is capable of being heated prior to being suitable for electrically heating the smoking system. The aerosol-generating substrate 30 is preferably a solid substrate and may comprise one or more of a powder, granules, shredded strips, strips or flakes of one or more of vanilla leaf, tobacco leaf, homogenised tobacco, expanded tobacco; alternatively, the solid substrate may contain additional tobacco or non-tobacco volatile flavour compounds to be released when the substrate is heated.
Alternatively, in other embodiments, the aerosol-generating substrate 30 may be a liquid substrate that is held in a reservoir and absorbed into a porous material, such as metal foam, porous ceramic, cellucotton, fiberglass, polypropylene, or the like, that is suitable for absorbing liquid substrates that may be retained within the porous material prior to use. Preferably, where a liquid substrate is employed, the electrically heated smoking system may further comprise an atomizer having at least one heating element adaptable to the tobacco substrate, the atomizer having a reservoir containing the liquid substrate and an atomizing assembly for drawing the liquid substrate and heat atomizing it.
Whilst the number of at least one heating element 20 of the electrically heated smoking system may be adapted to suit the length of the cigarette, the amount of smoke emitted, etc. and arranged such that effective heating of the aerosol-generating substrate 30 results in good release of the volatile compounds and the heating element 20 is in the embodiment of figure 1 inserted directly into the aerosol-generating substrate 30 for heating, in other variations the aerosol-generating substrate 30 may be heated by heat conduction. In particular having the heating element 20 at least partially in contact with the aerosol-generating substrate 30, or a carrier on which the aerosol-generating substrate 30 may be deposited; alternatively, the heat of the heating element 20 may be transferred to the aerosol-generating substrate 30 by a thermally conductive element.
It should be noted that the preferred embodiments of the present invention are shown in the specification and the drawings, but the present invention is not limited to the embodiments described in the specification, and further, it will be apparent to those skilled in the art that modifications and changes can be made in the above description, and all such modifications and changes should fall within the protection scope of the appended claims.
Claims (10)
1. An electrically heated smoking system comprising a power supply, at least one heating element connected to the power supply for heating an aerosol-generating substrate; wherein the aerosol-generating substrate releases a plurality of volatile compounds upon heating; characterized in that the electrically heated smoking system further comprises:
the detection module is used for measuring the working state of the heating element;
the electric energy adjusting module is used for adjusting the electric energy output by the power supply to the heating element;
the control module is used for controlling the detection module to measure the working state of the heating element and controlling the electric energy adjusting module to adjust the electric energy output by the power supply to the heating element according to the measured working state;
the detection module and the power regulating module are configured to alternately operate at a certain frequency.
2. The electrically heated smoking system of claim 1, wherein the operating state of the heating element comprises at least one of an operating voltage value, an operating current value, a real-time resistance value, a real-time resistivity coefficient, or an operating temperature of the heating element.
3. The electrically heated smoking system of claim 1, wherein the detection module comprises an electrical input, a signal detection, a controlled, and a signal output; the electric input end is connected with a power supply, the signal detection end is connected with the heating element, and the controlled end and the signal output end are both connected with the control module;
the electric energy adjusting module comprises an electric energy input end, an electric energy output end and a controlled end; the electric energy input end is connected with the power supply, the electric energy output end is connected with the heating element, and the controlled end is connected with the control module.
4. An electrically heated smoking system according to claim 1, further comprising:
the first switch is used for controlling the power supply to supply power to the detection module; the electrical input end of the detection module is connected with the power supply through the first switch.
5. The electrically heated smoking system of claim 4, wherein the power regulating module comprises a second switch having one end connected to the power source and the other end connected to the heating element, and the second switch is turned on and off to regulate the power output from the power source to the heating element; the second switch is configured to open when the measured value of the voltage across the heating element is above a preset voltage threshold.
6. The electrically heated smoking system of claim 5, wherein the first switch and the second switch are configured to be alternately turned on at a frequency such that the detection module and the power adjustment module alternately operate at the frequency.
7. An electrically heated smoking system according to claim 1, wherein the detection module comprises:
the constant current conversion unit is used for converting the output voltage of the power supply into a constant current and outputting the constant current to the heating element;
and the voltage detection unit is used for measuring the voltage value of the two ends of the heating element under the constant current.
8. The electrically heated smoking system of claim 7, wherein the constant current conversion unit comprises a voltage regulator, a first resistor, a first capacitor, and a second capacitor;
the voltage stabilizer is provided with a voltage input end, a voltage output end and a common connecting end, and the voltage input end is connected with the power supply; one end of the first resistor is connected with the voltage output end, and the other end of the first resistor is connected with the common connecting end;
one end of the first capacitor is connected with the voltage input end, and the other end of the first capacitor is connected with the common connecting end; one end of the second capacitor is connected with the voltage output end, and the other end of the second capacitor is connected with the common connecting end.
9. The electrically heated smoking system of claim 7, wherein the voltage detection unit comprises an amplifier having a controlled terminal, a voltage detection terminal, and a signal output terminal; wherein,
the controlled end is connected with the control module, the voltage detection end is connected with the heating element, and the signal output end is connected with the control module.
10. An electrically heated smoking system according to any of claims 7 to 9, wherein the power adjustment module comprises:
the voltage boosting unit is used for boosting the power supply voltage of the power supply to the heating element when the measured voltage value at the two ends of the heating element is lower than a preset voltage threshold range;
a voltage reduction unit; and the voltage control circuit is used for reducing the power supply voltage of the power supply to the heating element when the measured voltage value of the two ends of the heating element is higher than a preset voltage threshold range.
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910263795.8A CN110025048A (en) | 2019-04-03 | 2019-04-03 | The releasing control method of electric heating Smoke-generating System and volatile compound |
| PCT/CN2020/082942 WO2020200271A1 (en) | 2019-04-03 | 2020-04-02 | Electric heating smoking system and release control method for volatile compound |
| EP20782634.8A EP3949773A4 (en) | 2019-04-03 | 2020-04-02 | Electric heating smoking system and release control method for volatile compound |
| KR1020217034565A KR20210140759A (en) | 2019-04-03 | 2020-04-02 | Electrically heated fuming systems and methods for controlling the emission of volatile compounds |
| JP2021557724A JP2022527926A (en) | 2019-04-03 | 2020-04-02 | Electric heating smoke generation system and emission control method of volatile compounds |
| US17/601,427 US20220192273A1 (en) | 2019-04-03 | 2020-04-02 | Electric heating smoking system and release control method for volatile compound |
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| CN201910263795.8A CN110025048A (en) | 2019-04-03 | 2019-04-03 | The releasing control method of electric heating Smoke-generating System and volatile compound |
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| CN110025048A true CN110025048A (en) | 2019-07-19 |
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