Heated aerosol generating device and method

Abstract

In the heated aerosol generating apparatus and method, the heated aerosol generating method includes the following steps: in a first step, the temperature of the heating device (2) is increased from an initial temperature to a first temperature by controlling the energy supply to the heating device (2) (S10); in a second step, the temperature of the heating device (2) is decreased from the first temperature to a second temperature by controlling the energy supply to the heating device (2) (S20), the second temperature being lower than the first temperature; and in a third step, the temperature of the heating device (2) is stabilized at the second temperature by controlling the energy supply to the heating device (2) (S30).

Description

[Technical field]

[0001] The present invention relates to the field of electronic cigarettes, and in particular to a heated aerosol generating device and method. [Background technology]

[0002] In low temperature tobacco devices, it is desirable for the aerosol generating device to be able to generate an aerosol that does not change over time. However, particularly when the aerosol is consumed by a person, the variation in heating temperature during continuous or repeated heating processes can affect the changes in the aerosol formulations, including nicotine and possibly flavorings, making it impossible to deliver an aerosol with consistent characteristics over time. Summary of the Invention [Problem to be solved by the invention]

[0003] SUMMARY OF THE PRESENT EMBODIMENT The present invention has as its technical object to overcome the drawback of the prior art in that it is not possible to deliver aerosols with consistent properties that do not change over time. [Means for solving the problem]

[0004] The technical solutions adopted in the present invention to solve the technical problems are as follows:

[0005] A heated aerosol generating method is provided, the method including:

[0006] In a first stage, the temperature of a heat generating device is increased from an initial temperature to a first temperature by controlling the energy supply to the heat generating device.

[0007] In a second stage, the temperature of the heat generating device is reduced from the first temperature to a second temperature by controlling the energy supply of the heat generating device, the second temperature being lower than the first temperature.

[0008] In a third stage, the temperature of the heat generating device is stabilized at the second temperature by controlling the energy supply to the heat generating device.

[0009] Preferably, in a first stage, the temperature of the heating device increases with time in a curvilinear manner, in a second stage, the temperature of the heating device decreases in a curvilinear manner, and in a third stage, the temperature of the heating device stabilizes linearly.

[0010] Preferably, the temperature of the heating device is further maintained within a preset allowable temperature range in the second and third stages by controlling the energy supply to the heating device.

[0011] Preferably, the acceptable temperature range has an upper limit between 450 and 500°C and a lower limit between 250 and 300°C.

[0012] Preferably, the first temperature is between 300 and 450°C and the second temperature is between 300 and 400°C.

[0013] Preferably, the time for the first stage is shorter than 20 seconds, the time for the second stage is longer than 20 seconds, and the time for the third stage is 200 to 600 seconds.

[0014] Preferably, in the second and third stages, the temperature of the heating device is detected to obtain a temperature detection value, the temperature detection value and the second temperature are subjected to PID calculation to obtain first heating control information, and the heating device is controlled to perform periodic heating based on the first heating control information; or, the resistance value of the heating device is detected to obtain a resistance detection value, the resistance detection value and the target resistance value are subjected to PID calculation to obtain second heating control information, the target resistance value is determined from the second temperature, and the heating device is controlled to perform periodic heating based on the second heating control information, thereby controlling the energy supply to the heating device to make the temperature of the heating device reach the second temperature.

[0015] Preferably, when detecting the temperature of the heat-generating device and obtaining a temperature detection value, a resistance detection value is obtained by detecting a resistance value of the heat-generating device during a stop period of the heating cycle of the heat-generating device, and the temperature detection value of the heat-generating device is determined based on the resistance detection value.

[0016] Preferably, after the detected temperature value of the heat generating device is determined based on the detected resistance value, a compensation process is further performed on the detected temperature value based on the cold / warm-up state of the heat generating device.

[0017] Preferably, the second temperature is further compensated for based on an environmental temperature.

[0018] Preferably, the control device further judges whether the detected temperature value or the detected resistance value is within a preset range, and if not, controls the heating device to stop heating.

[0019] Preferably, the device further determines whether the energy supply to the heat generating device within a predetermined period of time exceeds a predetermined energy value, and if the energy supply exceeds the predetermined energy value, controls the heat generating device to stop heating.

[0020] Preferably, further in a fourth stage, the temperature of the heat generating device is gradually reduced from the second temperature by controlling the energy supply to the heat generating device.

[0021] The present invention further provides a heated aerosol generator including a heating device and a power source for supplying energy to the heating device, the apparatus further including a control circuit for, in a first stage, increasing a temperature of the heating device from an initial temperature to a first temperature by controlling an energy supply to the heating device, in a second stage, decreasing a temperature of the heating device from the first temperature to a second temperature by controlling an energy supply to the heating device, the second temperature being lower than the first temperature, and in a third stage, stabilizing the temperature of the heating device at the second temperature by controlling an energy supply to the heating device.

[0022] Preferably, the control circuit includes a detection module for detecting the temperature / resistance value of the heating device to obtain a temperature / resistance detection value, and a microprocessor for performing a PID calculation on the temperature / resistance detection value and the second temperature / target resistance value to obtain heating control information and for controlling the heating device to perform periodic heating based on the heating control information, and the target resistance value is determined from the second temperature.

[0023] Preferably, the detection module includes a first switching transistor, a second switching transistor, a third switching transistor and a standard resistor. The first terminal of the first switching transistor and the first terminal of the second switching transistor are respectively connected to the positive terminal of the power supply, and the second terminal of the first switching transistor is connected to the first terminal of the standard resistor. The second terminal of the standard resistor and the second terminal of the second switching transistor are respectively connected to the first terminal of the heat-generating device, the second terminal of the heat-generating device is connected to the first terminal of the third switching transistor, and the second terminal of the third switching transistor is connected to ground. The first input terminal of the microprocessor is connected to the second terminal of the first switching transistor, the second input terminal of the microprocessor is connected to the second terminal of the standard resistor, the third input terminal of the microprocessor is connected to the second terminal of the heat-generating device, the first output terminal of the microprocessor is connected to the control terminal of the first switching transistor, the second output terminal of the microprocessor is connected to the control terminal of the second switching transistor, and the third output terminal of the microprocessor is connected to the control terminal of the third switching transistor.

[0024] Preferably, the first switching transistor is an NPN bipolar transistor, the first terminal of the first switching transistor is a collector, the second terminal of the first switching transistor is an emitter, and the control terminal of the first switching transistor is a base.

[0025] The second switching transistor is a P-type field effect transistor. A first terminal of the second switching transistor is a source, a second terminal of the second switching transistor is a drain, and a control terminal of the second switching transistor is a gate.

[0026] The third switching transistor is an N-type field effect transistor. A first terminal of the third switching transistor is a drain, a second terminal of the third switching transistor is a source, and a control terminal of the third switching transistor is a gate. Effect of the Invention

[0027] When implementing the technical solution of the present invention, by setting a target temperature in the second stage (a second temperature lower than the first temperature), it is possible to ensure that the tobacco capsule continuously generates aerosol at an optimal temperature, and by maintaining the second temperature stable in the third stage, the rate of heat transfer from the heating device to the tobacco capsule is increased, so that an aerosol with consistent properties can be delivered without time-varying. [Brief description of the drawings]

[0028] [Figure 1] FIG. 1 is a flowchart of a heated aerosol generating method according to a first embodiment of the present invention. [Diagram 2] FIG. 2 is a schematic diagram of the temperature distribution of the heat generating device in the first embodiment of the present invention. [Diagram 3] FIG. 3 is a structural diagram of the heated aerosol generator in the first embodiment of the present invention. [Figure 4] FIG. 4 is a circuit diagram of the heated aerosol generator in the first embodiment of the present invention. [Diagram 5] FIG. 5 is a schematic diagram of the temperature distribution of the heat generating device in Example 2 of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0029] The following will clearly and concisely describe the technical solutions in the embodiments of the present invention in combination with the drawings related to the embodiments of the present invention. It should be noted that the embodiments described herein are only some of the embodiments of the present invention, and are not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without requiring creative labor, all belong to the scope of protection of the present invention.

[0030] FIG. 1 is a flow chart of a heated aerosol generating method in the first embodiment of the present invention. The heated aerosol generating method in the present embodiment is applied to a control circuit of a heated aerosol generating device. It should be understood that the heated aerosol generating device further includes a heating device and a power source. The power source is used to provide energy to the heating device. The power source can be a battery, such as a rechargeable lithium-ion battery, a nickel-hydrogen battery, a nickel-cadmium battery, or a lithium battery. The heating device is also called a heater and can have various forms. For example, the heating device can be a heating sheet, a heating needle, a heating rod, a heating wire or a wire. Alternatively, the heating device can be a combination of two or more different forms of heating devices.

[0031] Combining FIG. 2, the heated aerosol generating method of this embodiment specifically includes the following steps:

[0032] Step S10: In a first stage, the temperature of a heat-generating device is increased from an initial temperature to a first temperature by controlling the energy supply to the heat-generating device.

[0033] In this step, the first stage is the period from 0 to t1. This stage is a stage in which the temperature rises rapidly. In principle, the allowable temperature is set to a temperature at which the desired volatile compounds in the tobacco capsule rapidly volatilize, but the temperature may be increased to a temperature at which the desired volatile compounds in the tobacco capsule rapidly volatilize. Volatility Compound Vaporization The first temperature is lower than the temperature. The first temperature is between 250-500°C at normal pressure and ambient temperature. As shown in FIG. 2, in the first stage, the temperature of the heat-generating device increases rapidly with time in a curved shape. In one embodiment, the normal pressure is standard atmospheric pressure, and the normal temperature is between 15-25°C.

[0034] Step S20: In a second stage, the temperature of the heat-generating device is reduced from the first temperature to a second temperature by controlling the energy supply to the heat-generating device, the second temperature being lower than the first temperature.

[0035] In this step, the second stage is the period from t1 to t2. This stage is a stage in which the temperature is slowly lowered. In this stage, the consistency of the volatilization of the compounds is basically maintained. The vapor temperature is lowered by slowly lowering the temperature. In the process of slowly lowering the temperature, it is required to achieve both the consistency of the volatilization of the compounds and a comfortable vapor temperature. As shown in FIG. 2, in the second stage, the temperature of the heating device is slowly lowered over time in a curved shape.

[0036] Step S30: In a third stage, the temperature of the heat-generating device is stabilized at the second temperature by controlling the energy supply to the heat-generating device.

[0037] In this step, 3 The third stage is the period from t2 to t3. This stage is also a stage where the temperature is maintained, for example, the fluctuation of the temperature is ≦1.5°C. In principle, this stage requires rational volatilization of the compound and consistency of the suction and volatilization in the device. As shown in Figure 2, in the third stage, the temperature of the heating device maintains a horizontal linear state over time.

[0038] In this embodiment, it should be noted that the selected first and second temperatures can ensure that the heated aerosol generating device continuously generates aerosol in the first, second and third stages, and the first and second temperatures may be determined based on the temperature range corresponding to the volatilization temperature of the aerosol forming substance in the substrate.

[0039] According to the technical solution of this embodiment, by setting the target temperature of the second stage (the second temperature lower than the first temperature), it is possible to ensure that the tobacco capsule continuously generates aerosol at an optimal temperature, and by maintaining the second temperature stable in the third stage, the rate of heat transfer from the heating device to the tobacco capsule is increased, so that an aerosol with consistent properties without time-dependent change can be delivered.

[0040] Further, the heated aerosol generating method of the present invention includes the following.

[0041] The energy supply to the heating device is controlled to maintain the temperature of the heating device within a preset allowable temperature range in the second and third stages.

[0042] In this embodiment, the allowable temperature range is determined according to the aerosol-forming substrate. The aerosol-forming substrate will release some volatile compounds due to different temperatures. In addition, some of the volatile compounds released from the aerosol-forming substrate are only formed during the heating process, and each volatile compound is released when it is above its specific release temperature. Therefore, the release or formation of these components can be avoided by controlling the maximum operating temperature to be below the release temperature of some volatile compounds. In addition, the maximum operating temperature is a temperature that can ensure that the substrate does not burn under normal operating conditions.

[0043] The acceptable temperature range has an upper limit between 450-500°C and a lower limit between 250-300°C. The first temperature can be between 300-450°C and the second temperature between 300-400°C. Preferably, the second temperature is below the combustion temperature of undesirable compounds present in typical combustion cigarettes or is about 380°C. Also, the duration of the first stage is less than 20 seconds, the duration of the second stage is greater than 20 seconds, and the duration of the third stage is 200-600 seconds.

[0044] In an optional embodiment, in the second and third stages, the temperature of the heat generating device is caused to reach a second temperature (target temperature) by controlling the energy supply to the heat generating device in the following manner.

[0045] The temperature of the heat generating device is detected to obtain a detected temperature value.

[0046] First heating control information is obtained by performing a PID calculation on the detected temperature value and the second temperature.

[0047] The heat generating device is controlled to perform periodic heating based on the first heating control information.

[0048] In this embodiment, first, the temperature of the heat generating device is detected, then the temperature detection value and the target temperature (second temperature) are input as PID, and the first heating control information is output after PID calculation. Finally, it is converted into a heating duty ratio by an internal preset algorithm, and the heat generating device is made to perform cyclic heating.

[0049] In another optional embodiment, in the second and third stages, the temperature of the heat generating device is caused to reach the second temperature (target temperature) by controlling the energy supply to the heat generating device in the following manner.

[0050] The resistance value of the heat generating device is detected to obtain a resistance detection value.

[0051] Second heating control information is obtained by performing a PID calculation on the detected resistance value and the target resistance value, where the target resistance value is determined from the second temperature.

[0052] The heat generating device is controlled to perform periodic heating based on the second heating control information.

[0053] In this embodiment, first, the resistance value of the heat generating device is detected, then the detected resistance value and the target resistance value (calculated backward from the second temperature) are input as PID, and the second heating control information is output after PID calculation. Finally, the second heating control information is converted into a heating duty ratio by an internal preset algorithm, and the heat generating device is made to perform cyclic heating.

[0054] In the above, two types of implementation methods for controlling the heating of the heat-generating device in the second and third stages have been described. However, in the first stage (the stage where the temperature rises rapidly), if the PID adjustment of the above method is performed, there is a risk of over-adjustment. Therefore, in order to avoid such a situation from occurring, in the first stage, integral adjustment may not be performed when controlling the heat generation of the heat-generating device. Alternatively, if the deviation between the detected temperature value and the target temperature value is larger than an arbitrary set value, the integral term is not included. In this way, the influence of the integral term in the temperature rise process can be reduced, thereby realizing a smooth transition of the temperature control stage.

[0055] In addition, in the process of controlling the heating of a heat-generating device, if the heating control is performed once for each heating cycle, if a large heating cycle is selected, the range of temperature change of the heat-generating device in each heating cycle will be large. On the other hand, if a small heating cycle is selected, the range of temperature change of the heat-generating device in each heating cycle will be small, but due to the performance limit of the microprocessor that performs PID control, it may not be possible to meet the need to collect and process data in real time. Therefore, in actual control, the control cycle should be set to an integer multiple of the heating cycle. That is, the control cycle = heating cycle * N, where N is an integer and N ≥ 1. This makes it possible to effectively guarantee the synchronization of heating and control.

[0056] Furthermore, in an optional embodiment, the temperature detection value can be obtained in the following manner.

[0057] A resistance detection value is obtained by detecting a resistance value of the heating device during a stop period of a heating cycle of the heating device.

[0058] A detected temperature value of the heat generating device is determined based on the detected resistance value.

[0059] In this embodiment, first, it should be explained that the heating device performs periodic heating control based on the duty ratio signal. Therefore, each heating cycle includes two parts, a heating period and a stop period, and the resistance value of the heating device is detected during the stop period. After obtaining the resistance detection value, a temperature detection value corresponding to the resistance detection value is calculated based on the correspondence between the resistance value and temperature.

[0060] Furthermore, after determining a detected temperature value of the heat generating device based on the detected resistance value, a compensation process is performed for the detected temperature value based on the cold / warm-up state of the heat generating device.

[0061] In this embodiment, it should be first explained that when there is a field distribution in the temperature of the heating device, with the increase in heating time and the increase in thermal conduction from the heating device to the matrix, the temperature may have a certain decreasing process for the same resistance value. There is a correlation between this process and the thermal conduction from the heating device to the matrix. That is, the volatilization situation when the heating device itself is in a warm state is different from that when it is in a cold state. Therefore, in order to achieve both the consistency of the volatilization of the compound and a comfortable vapor temperature, a compensation algorithm is added internally. In this algorithm, when the temperature decreases due to thermal conduction, the relevant terms are time and the target temperature. That is, the actual temperature detection value T = F(R Heater )+f(t,T 目標 This ensures that the entire intake phase closely matches the cold condition.

[0062] Further, the heated aerosol generating method of the present invention includes the following.

[0063] Compensation is performed for the second temperature based on the environmental temperature.

[0064] In this embodiment, when the external environmental temperature changes, the target temperature (second temperature) must also be compensated for in order to maintain the experience of the product in the inhalation stage. For example, when the winter environmental temperature is low (e.g., below 15°C), the second temperature is increased to maintain the inhalation temperature into the mouth. On the other hand, when the summer temperature is high (e.g., above 25°C), the second temperature is decreased to maintain the inhalation temperature into the mouth.

[0065] Furthermore, in order to improve safety during use, the heated aerosol generating method of the present invention includes the following:

[0066] It is determined whether the detected temperature value is within a preset range, and if it is not within the preset range, the heating device is controlled to stop heating. The preset range has an upper limit of 380 to 500°C and a lower limit of 250 to 300°C.

[0067] Alternatively, the device determines whether the energy supply to the heat generating device within a preset period of time exceeds a preset energy value, and if the energy supply exceeds the preset energy value, controls the heat generating device to stop heating.

[0068] In this embodiment, the resistance value of the heating device is detected in real time throughout the temperature control stage to estimate the temperature value. In the case of an abnormality, if the resistance detection value or temperature detection value of the heating device exceeds a predetermined upper or lower limit, the device is stopped in an emergency to avoid safety risks. In addition, if the energy supplied by the heating device exceeds a preset energy at the ambient temperature within a preset period (unit time), the device is also stopped in an emergency to avoid safety risks. For example, under normal circumstances, the energy supply of the heating device is between 0.5 and 2.0 W, and is stopped in an emergency when it exceeds 3.0 W within a preset period (for example, 1 to 5 s).

[0069] FIG. 3 shows a structural diagram of a heated aerosol generator in Example 1 of the present invention. The heated aerosol generator of this example includes a housing 1, a heating device 2 housed in the housing, a power source 3, and a control circuit 4. The power source 3 is used to supply energy to the heating device 2. In the first stage, the control circuit 4 controls the energy supply of the heating device 2 to increase the temperature of the heating device 2 from an initial temperature to a first temperature. In the second stage, the control circuit 4 controls the energy supply of the heating device 2 to decrease the temperature of the heating device 2 from the first temperature to a second temperature. The second temperature is lower than the first temperature. In the third stage, the energy supply of the heating device 2 is controlled to stabilize the temperature of the heating device 2 at the second temperature. In this embodiment, at least a part of the aerosol-forming substrate 5 is inserted into the housing 1 from one end of the housing. In addition, the heating device 2 is inserted into the inside of the aerosol-forming substrate 5 to perform heating. The aerosol-forming substrate 5 is a tobacco stick. The heat generating device 2 includes a sheet-shaped heat generating element 21 and a fixing base 22 for fixing the heat generating element.

[0070] The control circuit further includes a detection module and a microprocessor. The detection module is used to detect the temperature / resistance value of the heat generating device to obtain a temperature / resistance detection value. The microprocessor is used to obtain heating control information by performing a PID calculation on the temperature / resistance detection value and the second temperature / target resistance value, and to control the heat generating device to perform periodic heating based on the heating control information. The target resistance value is determined from the second temperature.

[0071] 4 is a circuit diagram of a heated aerosol generator in Example 1 of the present invention. The heated aerosol generator in this example includes a heat generating device Heater, a power supply (not shown), and a control circuit. The control circuit includes a microprocessor U1 and a detection module. The detection module includes a first switching transistor Q1, a second switching transistor Q2, a third switching transistor Q3, and a standard resistor R1. A first terminal of the first switching transistor Q1 and a first terminal of the second switching transistor Q2 are respectively connected to the positive terminal BAT of the power supply. + , and the second terminal of the first switching transistor Q1 is connected to the first terminal of the standard resistor R1. Also, the second terminal of the standard resistor R1 and the second terminal of the second switching transistor Q2 are respectively connected to the first terminal of the heat generating device Heater, the second terminal of the heat generating device Heater is connected to the first terminal of the third switching transistor Q3, and the second terminal of the third switching transistor Q3 is connected to ground. The first input terminal of the microprocessor U1 is connected to the second terminal of the first switching transistor Q1, the second input terminal of the microprocessor U1 is connected to the second terminal of the standard resistor R1, the third input terminal of the microprocessor U1 is connected to the second terminal of the heat generating device Heater, the first output terminal of the microprocessor U1 is connected to the control terminal of the first switching transistor Q1, the second output terminal of the microprocessor U1 is connected to the control terminal of the second switching transistor Q2, and the third output terminal of the microprocessor U1 is connected to the control terminal of the third switching transistor Q3.

[0072] In this embodiment, the first switching transistor Q1 is an NPN bipolar transistor. The first terminal of the first switching transistor Q1 is a collector, the second terminal of the first switching transistor Q1 is an emitter, and the control terminal of the first switching transistor Q1 is a base. The second switching transistor Q2 is a P-type field effect transistor. The first terminal of the second switching transistor Q2 is a source, the second terminal of the second switching transistor Q2 is a drain, and the control terminal of the second switching transistor Q2 is a gate. The third switching transistor Q3 is an N-type field effect transistor. The first terminal of the third switching transistor Q3 is a drain, the second terminal of the third switching transistor Q3 is a source, and the control terminal of the third switching transistor Q3 is a gate. It should be understood that in other embodiments, the three switching transistors may be other types of switching transistors.

[0073] Next, the operating principle of the electric circuit will be described.

[0074] First, it should be noted that the standard resistor R1 is a high-precision resistor that balances measurement accuracy and the amount of heat generated by the standard resistor R1. Generally, the resistance range of R1 is 1x R Heater ~10x R Heater The output voltage range of the power supply is between 2.8 and 4.2V.

[0075] When the microprocessor U1 controls the second switching transistor Q2 and the third switching transistor Q3 to be turned on and the first switching transistor Q1 to be turned off, the power passes through the second switching transistor Q2, the heat-generating device Heater, and the third switching transistor Q3 to form a heating path, and heats the heat-generating device Heater. The microprocessor U1 can also approximately calculate the current I of the heating path by collecting the voltage of the third input terminal. That is, I=VMEAS3 / R Q3 R Q3is the internal resistance when the third switching transistor Q3 is on, and VMEAS3 is the voltage at the third input terminal of the microprocessor U1. This makes it possible to determine whether an overcurrent has occurred from the current I, and if an overcurrent has occurred, overcurrent protection is performed.

[0076] When the microprocessor U1 controls the first switching transistor Q1 and the third switching transistor Q3 to be turned on and the second switching transistor Q2 to be turned off, the power passes through the first switching transistor Q1, the standard resistor R1, the heating device Heater, and the third switching transistor Q3 to form a resistance measurement path. At this time, a voltage V1 is formed in the standard resistor R1, and a voltage V2 is formed in the heating device Heater. The microprocessor U1 determines V1 by collecting the voltages of its first input terminal and second input terminal, that is, V1=MEAS1-MEAS2. The microprocessor U1 also determines V2 by collecting the voltages of its second input terminal and third input terminal, that is, V2=MEAS2-MEAS3. Then, the resistance value R of the heating device Heater is calculated based on the following formula: Heater That is, R Heater = (MEAS2-MEAS3)*R1 / (MEAS1-MEAS2), where MEAS1 is the voltage at a first input terminal of microprocessor U1 and MEAS2 is the voltage at a second input terminal of microprocessor U1.

[0077] It should be further noted that in each heating cycle, the microprocessor U1 controls the enable of the second switching transistor Q2 based on the on-time of the duty ratio, thereby realizing the heating control of the heat-generating device. In the off-phase of the second switching transistor Q2, a part or all of the time of the off-phase is selected, and the enable of the first switching transistor Q1 is controlled to realize the heating control of the heat-generating device. Heater In order to prevent the temperature of the heat generating device from fluctuating greatly during the ON and OFF processes of the second switching transistor Q2, the duration of each heating cycle may be set to between 1 and 50 mS.

[0078] In another embodiment of the present invention, the heated aerosol generating method of this embodiment further comprises, after the third step,

[0079] In a fourth stage, the temperature of the heat generating device is gradually decreased from the second temperature by controlling the energy supply to the heat generating device.

[0080] In this step, the fourth stage is a certain time after t3, and as the substrate evaporates and decreases, the heating device is controlled to slowly cool down. This achieves the purpose that the aerosol substrate achieves a desired amount of atomization at the final end point. As shown in FIG. 5, in the fourth stage, the temperature of the heating device slowly decreases with time in a curved shape. Of course, in some other embodiments, it may also slowly decrease in a diagonal shape.

[0081] The above description is merely a preferred embodiment of the present invention, and does not limit the present invention. Those skilled in the art may have various modifications and variations in the present invention. Any modifications, equivalent replacements, improvements, etc., made within the spirit and principle of the present invention are all included in the scope of the claims of the present invention.

Claims

1. In a first stage, the energy supply to the heat generating device is performed by PID control, and the PID control does not perform integral adjustment, or, when the deviation between the temperature detection value and the target temperature value is larger than a certain set value, the temperature of the heat generating device is increased from an initial temperature to a first temperature by control that does not take into account the integral term; In a second stage, a temperature of the heat generating device is reduced from the first temperature to a second temperature by controlling an energy supply to the heat generating device, the second temperature being lower than the first temperature; In a third stage, the temperature of the heat generating device is stabilized at the second temperature by controlling the energy supply to the heat generating device; In the second and third stages, Detecting the temperature of the heat generating device to obtain a temperature detection value; obtaining first heating control information by performing a PID calculation on the temperature detection value and the second temperature; and controlling the heat generating device to perform periodic heating based on the first heating control information. Or, Detecting a resistance value of the heat generating device to obtain a resistance detection value; second heating control information is obtained by performing a PID calculation on the detected resistance value and a target resistance value, and the target resistance value is determined from the second temperature; and controlling the heat generating device to perform periodic heating based on the second heating control information. A heated aerosol generating method, characterized in that the temperature of the heating device is caused to reach a second temperature by controlling the energy supply to the heating device.

2. In a first stage, the temperature of the heating device increases with time in a curved manner; In a second stage, the temperature of the heating device decreases in a curved manner; The heated aerosol generating method according to claim 1, wherein in the third stage, the temperature of the heating device is stabilized linearly.

3. The heated aerosol generating method according to claim 1, further comprising controlling the energy supply to the heating device to maintain the temperature of the heating device within a preset allowable temperature range in the second and third stages.

4. 4. The heated aerosol generating method according to claim 3, wherein the range of the allowable temperature has an upper limit between 450 and 500°C and a lower limit between 250 and 300°C.

5. the first temperature is between 300 and 450° C.; 2. The heated aerosol generating method according to claim 1, wherein the second temperature is between 300 and 400° C.

6. the duration of said first stage is less than 20 seconds; the second stage lasts for more than 20 seconds; 2. The method of claim 1, wherein the third step is performed for a period of 200 to 600 seconds.

7. When detecting the temperature of the heat generating device and obtaining a temperature detection value, Obtaining a resistance detection value by detecting a resistance value of the heating device during a stop period of a heating cycle of the heating device; The heated aerosol generating method according to claim 1, wherein the detected temperature value of the heating device is determined based on the detected resistance value.

8. determining a temperature detection value of the heat generating device based on the resistance detection value; The heated aerosol generating method according to claim 7, characterized in that a compensation process is performed on the detected temperature value based on the cold / warm-up state of the heat generating device.

9. 2. The heated aerosol generating method according to claim 1, further comprising the step of: performing compensation processing for the second temperature based on an environmental temperature.

10. Furthermore, it is determined whether the detected temperature value or the detected resistance value is within a preset range, 2. The heated aerosol generating method according to claim 1, further comprising controlling the heating device to stop heating if the temperature is not within the preset range.

11. determining whether the energy supply to the heat generating device within a predetermined period of time exceeds a predetermined energy value; 2. The heated aerosol generating method according to claim 1, further comprising controlling the heating device to stop heating when a preset energy value is exceeded.

12. The heated aerosol generating method according to claim 1, further comprising controlling the energy supply to the heating device in a fourth step to gradually lower the temperature of the heating device from the second temperature.

13. A heated aerosol generating apparatus including a heating device and a power source for supplying energy to the heating device, Furthermore, in the first stage, the energy supply to the heat generating device is performed by PID control, and the PID control does not perform integral adjustment, or, when the deviation between the temperature detection value and the target temperature value is greater than a certain set value, the temperature of the heat generating device is increased from an initial temperature to a first temperature by control that does not take into account the integral term; In a second stage, a temperature of the heat generating device is reduced from the first temperature to a second temperature by controlling an energy supply to the heat generating device, the second temperature being lower than the first temperature; In a third stage, the temperature of the heat generating device is stabilized at the second temperature by controlling the energy supply to the heat generating device; In the second and third stages, Detecting the temperature of the heat generating device to obtain a temperature detection value; obtaining first heating control information by performing a PID calculation on the temperature detection value and the second temperature; and controlling the heat generating device to perform periodic heating based on the first heating control information. Or, Detecting a resistance value of the heat generating device to obtain a resistance detection value; second heating control information is obtained by performing a PID calculation on the detected resistance value and a target resistance value, and the target resistance value is determined from the second temperature; and controlling the heat generating device to perform periodic heating based on the second heating control information. A heated aerosol generating device comprising: a control circuit that controls the energy supply to the heating device to cause the temperature of the heating device to reach a second temperature.

14. The control circuit includes: a detection module for detecting a temperature / resistance value of the heat generating device to obtain a temperature / resistance detection value; a microprocessor for obtaining heating control information by performing a PID calculation on the temperature / resistance detection value and the second temperature / target resistance value, and for controlling the heat generating device to perform periodic heating based on the heating control information; The heated aerosol generating device according to claim 13, wherein the target resistance value is determined from the second temperature.

15. The heated aerosol generator of claim 14, characterized in that the detection module includes a first switching transistor, a second switching transistor, a third switching transistor, and a standard resistor, wherein a first terminal of the first switching transistor and a first terminal of the second switching transistor are respectively connected to the positive terminal of the power source, a second terminal of the first switching transistor is connected to the first terminal of the standard resistor, a second terminal of the standard resistor and a second terminal of the second switching transistor are respectively connected to the first terminal of the heat-generating device, a second terminal of the heat-generating device is connected to the first terminal of the third switching transistor, and a second terminal of the third switching transistor is connected to ground, a first input terminal of the microprocessor is connected to the second terminal of the first switching transistor, a second input terminal of the microprocessor is connected to the second terminal of the standard resistor, a third input terminal of the microprocessor is connected to the second terminal of the heat-generating device, a first output terminal of the microprocessor is connected to a control terminal of the first switching transistor, a second output terminal of the microprocessor is connected to a control terminal of the second switching transistor, and a third output terminal of the microprocessor is connected to the control terminal of the third switching transistor.

16. the first switching transistor is an NPN bipolar transistor, a first terminal of the first switching transistor is a collector, a second terminal of the first switching transistor is an emitter, and a control terminal of the first switching transistor is a base; The heated aerosol generator described in claim 15, characterized in that the second switching transistor is a P-type field effect transistor, a first terminal of the second switching transistor is a source, a second terminal of the second switching transistor is a drain, and a control terminal of the second switching transistor is a gate, and the third switching transistor is an N-type field effect transistor, a first terminal of the third switching transistor is a drain, a second terminal of the third switching transistor is a source, and a control terminal of the third switching transistor is a gate.

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