Heat-not-burn device and heating control method therefor

Abstract

Disclosed are a heat-not-burn device and a heating control method therefor. The heating control method comprises: upon receipt of a heating starting signal, controlling a heating assembly to heat an aerosol forming matrix, so that the aerosol forming matrix is heated from an initial temperature to a first temperature; upon detection that a vaping action starts, controlling the heating assembly to heat the aerosol forming matrix, so that the aerosol forming matrix is heated from a current temperature to a third temperature, wherein the third temperature is greater than or equal to the first temperature; and upon detection that the vaping action is finished, controlling the heating assembly to heat the aerosol forming matrix, so that the aerosol forming matrix is cooled from a current temperature to a fourth temperature, wherein the fourth temperature is smaller than the third temperature.

Description

Heat-not-burn device and heating control method thereof Technical Field

[0001] The present invention relates to the field of atomization, and in particular to a heat-without-combustion device and a heating control method thereof. Background Art

[0002] Existing heat-not-burn devices generally require a pre-set temperature control curve (set during production). When a user uses the heat-not-burn device, the heating component is controlled according to the temperature control curve to heat the aerosol-forming substrate. Thus, during the heating process, regardless of whether the user takes a puff, heating must be performed according to a fixed temperature value at a fixed stage on the temperature control curve. Therefore, not only does this result in unnecessary energy waste, but the outer shell temperature of the heat-not-burn device may become too high during continuous puffing. Technical issues

[0003] The technical problem to be solved by the present invention is that the prior art has the technical defect of wasting unnecessary energy. Summary of the Invention

[0004] The technical solution adopted by the present invention to solve the technical problem is to construct a heating control method for a heating-without-combustion device, wherein the heating-without-combustion device includes a heating component, which is a microwave heating component or a laser heating component, including:

[0005] preheating step: upon receiving a heating start signal, controlling the heating component to heat the aerosol-forming substrate so that the aerosol-forming substrate is first raised from an initial temperature to a first temperature;

[0006] a heating step: upon detecting the start of a puff, controlling the heating assembly to heat the aerosol-forming substrate so as to raise the aerosol-forming substrate from a current temperature to a third temperature, wherein the third temperature is greater than or equal to the first temperature;

[0007] Cooling step: upon detecting the end of the puffing action, controlling the heating component to heat the aerosol-forming substrate so as to cool the aerosol-forming substrate from a current temperature to a fourth temperature, wherein the fourth temperature is lower than the third temperature.

[0008] Preferably, the heating step further comprises:

[0009] If the first puff action is not detected within the preset time, the heating component is controlled to decrease from the first temperature to a second temperature, wherein the second temperature is less than or equal to the first temperature.

[0010] Preferably, the fourth temperature is greater than or equal to the second temperature.

[0011] Preferably, the heating step further comprises:

[0012] The third temperature is determined according to a current total number of puffs, wherein the third temperature is positively correlated with the current total number of puffs.

[0013] Preferably, the cooling step further comprises:

[0014] The fourth temperature is determined according to the current total number of puffs, wherein the fourth temperature is positively correlated with the current total number of puffs.

[0015] Preferably, the difference between the fourth temperature and the third temperature is 5-10 degrees; and / or the difference between the second temperature and the first temperature is 5-10 degrees.

[0016] Preferably, the heating step comprises:

[0017] a heating sub-step: upon detecting the start of a puffing action, controlling the heating component to heat the aerosol-forming substrate at a first preset power within a first time period;

[0018] Temperature control sub-step: After the first time period ends, if it is determined that the current temperature is lower than the third temperature, the heating component is controlled to heat at a second preset power within a second time period; if it is determined that the current temperature is higher than the third temperature, the heating component is controlled to stop heating within a third time period; wherein, the second preset power is less than the first preset power.

[0019] The present invention also provides a heat-without-combustion device, comprising:

[0020] a heating assembly for heating the aerosol-forming substrate, wherein the heating assembly is a microwave heating assembly or a laser heating assembly;

[0021] a power source for providing electrical power to the heating assembly;

[0022] a puff detection component for detecting whether a puff action has occurred;

[0023] A control component, wherein the control component is configured to:

[0024] preheating step: upon receiving a heating start signal, controlling the heating component to heat the aerosol-forming substrate so that the aerosol-forming substrate is first raised from an initial temperature to a first temperature;

[0025] a heating step: upon detecting the start of a puff, controlling the heating assembly to heat the aerosol-forming substrate so as to raise the aerosol-forming substrate from a current temperature to a third temperature, wherein the third temperature is greater than or equal to the first temperature;

[0026] Cooling step: upon detecting the end of the puffing action, controlling the heating component to heat the aerosol-forming substrate so as to cool the aerosol-forming substrate from a current temperature to a fourth temperature, wherein the fourth temperature is lower than the third temperature.

[0027] Preferably, the heating component is a microwave heating component, and the microwave heating component comprises:

[0028] an outer conductor unit including a closed end and an open end opposite to the closed end;

[0029] a receiving cavity provided in the outer conductor unit for receiving an aerosol-forming matrix;

[0030] A microwave source unit, configured to generate a microwave signal;

[0031] A microwave feeding unit, used to feed the microwave signal generated by the microwave source unit;

[0032] An inner conductor unit, and the inner conductor unit includes a microwave matching structure and a microwave radiating structure combined with the microwave matching structure, wherein the bottom of the microwave matching structure is connected to the closed end of the outer conductor unit and is in ohmic contact with the end wall of the closed end, forming a short-circuit end of the microwave heating component; one end of the microwave radiating structure is combined with the top of the microwave matching structure, and the other end of the microwave radiating structure is located in the accommodating cavity, forming an open-circuit end of the microwave heating component.

[0033] Preferably, the heating component is a laser heating component, and the laser heating component comprises:

[0034] A circuit board and a laser chip mounted on the circuit board, wherein the laser chip is used to emit laser light toward the aerosol-forming substrate.

[0035] Preferably, the control component is configured as follows: the heating step includes a temperature raising sub-step and a temperature controlling sub-step, wherein:

[0036] a heating sub-step: upon detecting the start of a puffing action, controlling the heating component to heat the aerosol-forming substrate at a first preset power within a first time period;

[0037] Temperature control sub-step: After the first time period ends, continue: if it is determined that the current temperature is lower than the third temperature, control the heating component to heat at a second preset power within the second time period; if it is determined that the current temperature is higher than the third temperature, control the heating component to stop heating within the third time period; wherein, the second preset power is less than the first preset power.

[0038] Preferably, the puff detection assembly comprises:

[0039] The first air pressure sensor is used to detect whether a suction action occurs by detecting the air pressure in the airway.

[0040] Preferably, the puff detection assembly comprises:

[0041] a second air pressure sensor, configured to detect whether a suction action occurs by detecting the air pressure in the airway, and to detect the suction force when a suction action occurs;

[0042] Furthermore, the control component is further configured to:

[0043] The first time period is acquired according to the suction force, wherein the first time period is positively correlated with the suction force. Beneficial effects

[0044] According to the technical solution of the present invention, during the heating process of a heat-not-burn device, the heating component only performs high-power heating when the user takes a puff, causing the aerosol-forming substrate to reach a higher temperature (the third temperature). When the user is not taking a puff, the aerosol-forming substrate is maintained at a lower temperature (the fourth temperature). This prevents excessive carbonization of the aerosol-forming substrate, minimizes losses, prevents excessive housing temperatures, and reduces device energy consumption. Furthermore, because the heating component is a microwave or laser heating component, preheating can be completed in a relatively short time (e.g., 2-3 seconds). Furthermore, with each puff, the temperature of the aerosol-forming substrate is rapidly increased, achieving rapid smoke production. This heating method is therefore suitable for applications requiring rapid puff detection and response. Furthermore, since heating control does not require a preset temperature control curve, users can take puffs at their own pace, without being constrained to complete puffs within a specific timeframe, thus enhancing the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] In order to more clearly illustrate the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without inventive efforts. In the drawings:

[0046] FIG1 is a flow chart of a first embodiment of a heating control method for a heat-without-combustion device according to the present invention;

[0047] FIG2 is a schematic diagram of a temperature control curve in one embodiment of the present invention;

[0048] FIG3 is a schematic diagram of a temperature control curve in another embodiment of the present invention;

[0049] FIG4 is a schematic diagram of a temperature control curve and a temperature detection curve in one embodiment of the present invention;

[0050] FIG5 is a logic structure diagram of a first embodiment of a heat-without-combustion device according to the present invention;

[0051] 6A and 6B are structural diagrams of a first embodiment of a heat-without-combustion device according to the present invention;

[0052] FIG7 is a circuit diagram of an MCU and an air pressure sensor of a heat-not-burn device according to an embodiment of the present invention.

[0053] Embodiments of the Invention

[0054] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0055] FIG1 is a flow chart of a first embodiment of a heating control method for a heat-not-burn device according to the present invention. The heating control method of this embodiment is applied to a control component of the heat-not-burn device, which further includes a heating component, a power supply, a puff detection component, etc., wherein the power supply provides power to the heating component; the puff detection component is used to detect whether a puff action occurs; and the heating component is used to heat the aerosol-forming substrate. Moreover, the heating component can have various forms, such as a heating plate, a heating needle, a heating rod, a heating wire or a filament. Alternatively, the heating component can also be a combination of two or more different forms of heating devices. In addition, the positional relationship between the heating component and the aerosol-forming substrate can have various forms, such as: the heating component is at least partially arranged in the center of the aerosol-forming substrate, that is, the heating method is central heating; the heating component is arranged at the end of the aerosol-forming substrate, that is, the heating method is end heating; the heating component is arranged around the circumference of the aerosol-forming substrate, that is, the heating method is circumferential heating.

[0056] As shown in FIG1 , the heating control method of this embodiment includes the following steps:

[0057] Preheating step S10: upon receiving a heating start signal, controlling the heating component to heat the aerosol-forming substrate so that the aerosol-forming substrate is first raised from an initial temperature to a first temperature;

[0058] In this step, the heating signal can be triggered by long-pressing a button on the heat-not-burn device, or automatically upon detecting the insertion of the aerosol-forming substrate. Furthermore, because the heating element is a microwave or laser heating element, and the high energy radiated by microwaves or lasers allows for instantaneous temperature increases in the aerosol-forming substrate. For example, when microwave heating is used, the heating element can raise the aerosol-forming substrate's temperature from 25°C (initial temperature is room temperature) to 251°C in 2.3 seconds, with an average temperature increase per unit time of (251-25) / 2.3 = 98.26°C / second. For another example, using microwaves to heat a Marlboro cigarette with a tobacco segment weighing 0.28g, at 20W of power for two seconds, the tobacco segment can be heated from room temperature (25°C) to over 260°C. Therefore, this heating method can complete preheating in 2-3 seconds, compared to the approximately 20 seconds required by existing resistance or electromagnetic heating methods. This significantly reduces preheating time, reduces user waiting time, and improves the user experience.

[0059] Heating step S20: upon detecting the start of a puffing action, controlling the heating component to heat the aerosol-forming substrate using microwaves or lasers to raise the aerosol-forming substrate from a current temperature to a third temperature, wherein the third temperature is greater than or equal to the first temperature;

[0060] In this step, the puff detection assembly may detect the user's puff action. Upon detecting the start of a puff action, the heating assembly may be controlled to raise the aerosol-forming substrate from its current temperature to a third temperature. In one embodiment, the third temperature may be equal to the first temperature; in another embodiment, the third temperature may be greater than the first temperature.

[0061] Cooling step S30: Upon detecting the end of the puffing action, controlling the heating assembly to heat the aerosol-forming substrate using microwaves or lasers to cool the aerosol-forming substrate from its current temperature to a fourth temperature, wherein the fourth temperature is lower than the third temperature. Preferably, the difference between the fourth temperature and the third temperature is 5 to 10 degrees Celsius.

[0062] In this step, upon detecting the end of a puff, the heating assembly is controlled to cool the aerosol-forming substrate from its current temperature to a fourth temperature. In one embodiment, upon detecting the end of a puff, heating of the heating assembly may be initially stopped to rapidly cool the temperature of the aerosol-forming substrate. Once the temperature has fallen to the fourth temperature, the heating assembly is controlled to resume heating the aerosol-forming substrate to maintain the aerosol-forming substrate at the fourth temperature. In another embodiment, upon detecting the end of a puff, the temperature of the aerosol-forming substrate may be slowly lowered to the fourth temperature by gradually reducing the power of the heating assembly.

[0063] In this embodiment, during the preheating phase, the heating assembly is controlled to raise the aerosol-forming substrate from an initial temperature to a first temperature. During the heating phase, upon detecting the onset of a puff, the heating assembly is controlled to raise the aerosol-forming substrate from its current temperature to a third temperature (the third temperature being greater than or equal to the first temperature). Upon detecting the end of a puff, the heating assembly is controlled to lower the aerosol-forming substrate from its current temperature to a fourth temperature (the fourth temperature being less than or equal to the third temperature). In other words, during the heating process of the heat-not-burn device, the heating assembly performs high-power heating, bringing the aerosol-forming substrate to a higher temperature (the third temperature), only when the user puffs. When the user is not puffing, the aerosol-forming substrate is maintained at a lower temperature (the fourth temperature). This prevents excessive carbonization of the aerosol-forming substrate, minimizes waste, prevents excessively high housing temperatures, and reduces device energy consumption. Furthermore, because the heating element is a microwave or laser heating element, preheating can be completed in a relatively short time (e.g., 2-3 seconds). Furthermore, with each puff, the temperature of the aerosol-forming matrix is ​​rapidly increased, enabling rapid smoke release. Therefore, this heating method is suitable for applications requiring rapid puff detection and rapid response. Furthermore, since heating control does not require a preset temperature control curve, users can puff at their own random frequency, without being restricted to a specific timeframe, thus enhancing the user experience.

[0064] Furthermore, in an optional embodiment, the heating step S20 further includes:

[0065] If the first puff action is not detected within the preset time, the heating component is controlled to decrease from the first temperature to a second temperature, wherein the second temperature is less than or equal to the first temperature.

[0066] In this embodiment, due to the low efficiency of the microwave or laser generating device (for example, less than 90%), if the user does not start to puff promptly after heating to the first temperature in the preheating stage, and the temperature is still maintained at this higher temperature, the aerosol-forming substrate will be consumed too quickly, and the energy consumption of the heat-not-burn device will also be too high, resulting in consequences such as heating of the outer shell, affecting the user experience. Therefore, after reaching the first temperature, the heating component is controlled to heat the aerosol-forming substrate, so that the temperature of the aerosol-forming substrate is further reduced from the first temperature to the second temperature until the user takes the first puff.

[0067] Furthermore, in an optional embodiment, the difference between the second temperature and the first temperature is 5-10 degrees Celsius; and / or the difference between the fourth temperature and the third temperature is 5-10 degrees Celsius. In this embodiment, because microwave or laser heating methods have lower thermal inertia than resistance or electromagnetic heating methods, the aerosol-forming substrate will rapidly cool down after losing the microwave or laser energy injection. To maintain a higher temperature for the tobacco without consuming excessive energy, the second temperature can be set to a value slightly lower than the first temperature, preferably with a difference of 5-10 degrees Celsius. For example, the first temperature is 315 degrees Celsius and the second temperature is 305 degrees Celsius. Similarly, the fourth temperature can be set to a value slightly lower than the third temperature, preferably with a difference of 5-10 degrees Celsius. For example, the third temperature is 315 degrees Celsius and the fourth temperature is 305 degrees Celsius.

[0068] Further, in an optional embodiment, the fourth temperature is greater than or equal to the second temperature.

[0069] Further, in an optional embodiment, the first temperature is equal to the third temperature, and the second temperature is equal to the fourth temperature.

[0070] In one specific embodiment, as shown in Figure 2 , the first and third temperatures are 315°C, respectively, and the second and fourth temperatures are 305°C, respectively. With reference to Figure 2 , upon receiving a heating start signal, the aerosol-forming substrate is heated from room temperature to the first temperature (315°C) over a period of time 0-time0 (e.g., 2 seconds) and maintained for a period of time (time0-time1), e.g., 1 second. If no first puff is detected within a predetermined time (e.g., 1 second) after reaching the first temperature, the aerosol-forming substrate is then cooled from the first temperature to the second temperature (305°C) at time1 and maintained there until the first puff is detected at time2 (F1). At time2, the aerosol-forming substrate is again heated to the third temperature (315°C) until the end of the puff is detected at time3. At time3, the aerosol-forming substrate is cooled from the third temperature (315°C) to the fourth temperature (305°C) until the second puff is detected (F2), and the cycle continues.

[0071] Furthermore, in an optional embodiment, the heating step S20 further includes:

[0072] determining the third temperature based on the current total number of puffs, wherein the third temperature is positively correlated with the current total number of puffs; and / or,

[0073] The cooling step S30 further includes:

[0074] The fourth temperature is determined according to the current total number of puffs, wherein the fourth temperature is positively correlated with the current total number of puffs.

[0075] In this embodiment, the third temperature and the fourth temperature corresponding to each puff are different and increase with the total number of puffs.

[0076] In one specific embodiment, as shown in FIG3 , the first temperature is 315°C, the second temperature is 305°C, the third temperature corresponding to the first puff is 317°C, and the fourth temperature corresponding to the first puff is 307°C; the third temperature corresponding to the second puff is 319°C, and the fourth temperature corresponding to the second puff is 309°C; and so on. With reference to FIG3 , upon receiving the heating start signal, the aerosol-forming substrate is heated from room temperature to the first temperature (315°C) over a period of time 0-time0 (e.g., 2 seconds) and maintained at this temperature for a period of time (time0-time1), e.g., 1 second. That is, if the first puff is not detected within a predetermined time (e.g., 1 second) after reaching the first temperature, the temperature is then lowered from the first temperature to the second temperature (305°C) at time1 and maintained until the first puff is detected at time2 (F1). At time2, the aerosol-forming substrate is heated to the third temperature (317°C) corresponding to the first puff, and the temperature is maintained until the end of the first puff is detected at time3. At time 3, the aerosol-forming matrix drops from the third temperature (317 degrees) to the fourth temperature (307 degrees) corresponding to the first puff, until the second puff action F2 is detected, and the cycle continues.

[0077] Of course, in other embodiments, each puff during the entire puffing process corresponds to a third temperature and a fourth temperature. Thus, there may be multiple third temperatures and multiple fourth temperatures corresponding to the entire puffing process. Furthermore, the third temperature corresponding to each puff may be independent of the current total number of puffs, and accordingly, the fourth temperature corresponding to each puff may be independent of the current total number of puffs. In other words, among the multiple third temperatures during the entire puffing process, at least some of the third temperatures have a temperature value equal to the first temperature, while other third temperatures have a temperature value greater than the first temperature. Accordingly, among the multiple fourth temperatures during the entire puffing process, at least some of the fourth temperatures have a temperature value equal to the second temperature, while other fourth temperatures have a temperature value greater than the second temperature. For example, during the entire puffing process, the user takes a total of thirteen puffs. The third temperatures corresponding to the first to the thirteenth puffs are 315 degrees, 317 degrees, 319 degrees, 321 degrees, 319 degrees, 317 degrees, 315 degrees, 317 degrees, 319 degrees, 321 degrees, 319 degrees, 317 degrees, and 315 degrees. The third temperatures corresponding to the first to the thirteenth puffs are 305 degrees, 307 degrees, 309 degrees, 321 degrees, 309 degrees, 307 degrees, 305 degrees, 307 degrees, 309 degrees, 321 degrees, 309 degrees, 307 degrees, and 305 degrees.

[0078] Furthermore, in an optional embodiment, the heat-not-burn assembly further includes a temperature-measuring assembly. It should be noted that the temperature-measuring assembly actually detects the temperature of the heating assembly, preferably the temperature of the outer wall of the heating assembly. The heating temperature of the aerosol-forming substrate is controlled by controlling the temperature of the heating assembly. The temperatures of the heating assembly and the aerosol-forming substrate are positively correlated, but not necessarily identical. That is, in some applications, the temperature of the heating assembly can be used to characterize the temperature of the aerosol-forming substrate. Furthermore, the heating step S20 includes:

[0079] a heating sub-step: upon detecting the start of a puffing action, controlling the heating component to heat the aerosol-forming substrate at a first preset power within a first time period;

[0080] Temperature Control Sub-Step: After the first time period ends, if the current temperature is determined to be lower than the third temperature, the heating component is controlled to heat at a second preset power for a second time period. If the current temperature is determined to be higher than the third temperature, the heating component is controlled to stop heating for a third time period. The second preset power is lower than the first preset power, and the second and third time periods are preferably the same, but may be different. It should also be noted that because the duration of a single puff (e.g., 1-2 seconds) minus the constant power heating time (the first time period, e.g., 350 ms) is significantly longer than the temperature detection period (e.g., 20-30 ms), the temperature control sub-step may repeat multiple cycles of temperature determination and power adjustment. For example, if a user's puff lasts 1 second, the first time period is 350 ms, the corresponding remaining time is 650 ms, and the temperature detection period is 30 ms, the temperature control sub-step will perform approximately 22 temperature determinations and power adjustments.

[0081] In this embodiment, when the control component controls the heating component, it first performs constant power (first preset power) heating for a period of time (first time period), and then periodically performs temperature judgment and power adjustment. Therefore, compared with the traditional PID control scheme, the control scheme of this embodiment can reduce the noise of the heating without burning device because the differentiator in the PID control scheme is sensitive to the high-frequency signal generated by the microwave heating component or the laser heating component and is prone to amplifying noise signals.

[0082] In one specific embodiment, the first time period is, for example, 350 ms, and the second and third time periods are, for example, 30 ms each. The first preset power may be the maximum output power, for example, 20 W, and the second preset power may be, for example, 10 W. Thus, upon detecting the start of a puff, the heating component is first controlled to heat at a constant power of 20 W for 350 ms, thereby raising the temperature of the aerosol-forming substrate. The temperature is then checked every 30 ms. If the current temperature is below a third temperature (the puff temperature), the heating component is controlled to heat at a constant power of 10 W for 30 ms. If the current temperature is above the third temperature, heating is stopped for 30 ms. This cycle of temperature detection and power adjustment is repeated until the cessation of puffing is detected.

[0083] In one specific embodiment, the first time period is, for example, 450 ms, the second time period is, for example, 30 ms, and the third time period is, for example, 20 ms. The first preset power may be the maximum output power, for example, 20 W, and the second preset power is, for example, 10 W. Thus, upon detecting the start of puffing, the heating component is first controlled to heat at a constant power of 20 W for 450 ms to increase the temperature of the aerosol-forming substrate. Temperature detection is then initiated. If the current temperature is below a third temperature (the puffing temperature), the heating component is controlled to heat at a constant power of 10 W for 30 ms. If the current temperature is above the third temperature, heating is stopped for 20 ms. This cycle of temperature detection and power adjustment is repeated until the cessation of puffing is detected.

[0084] In one specific embodiment, as shown in Figure 4 , curve L3 represents the power output to the heating component, curve L1 represents the temperature detected by the temperature measuring component, and curve L2 represents the set temperature target curve (i.e., the temperature control curve). Furthermore, this temperature target curve L2 is not pre-set in the heat-not-burn device's processor but rather is a curve related to the user's actual puffing frequency. Therefore, within the same heat-not-burn device, the corresponding temperature target curve may vary depending on the user's puffing frequency at different times. As shown in Figure 4 , during the heating control process, through the temperature increase and temperature control sub-steps, the temperature detection curve L1 can be brought close to the temperature target curve.

[0085] Furthermore, in an optional embodiment, the heating control method of the present invention further includes: outputting a reminder message when the aerosol-forming substrate first heats from the initial temperature to the first temperature. For example, the reminder message may be output via sound, light, vibration, etc. In this embodiment, when the aerosol-forming substrate reaches the first temperature, a reminder message may be output to remind the user that the preheating stage is complete and that the aerosol-forming substrate can be used for inhalation.

[0086] Furthermore, in an optional embodiment, the heating control method of the present invention further includes:

[0087] When it is determined that a preset stop condition is met, the heating control of the heating component is stopped, wherein the preset stop condition includes at least one of the following:

[0088] The total number of puffs reaches a preset number, for example, 10-16 times;

[0089] The cumulative heating time reaches a preset time, which is, for example, 4-60 minutes;

[0090] A stop command is received from the user.

[0091] In this embodiment, when the total number of puffs reaches a specified number, or the entire puff time exceeds a predetermined time, or the user inputs a stop command (eg, long pressing a button on the body), the heating control of the heating component can be stopped.

[0092] FIG5 is a logical structure diagram of a first embodiment of a heat-not-burn device according to the present invention. The heat-not-burn device according to this embodiment includes a heating component 1, a control component 2, a puff detection component 3, and a power supply 4. The heating component 1 is used to heat the aerosol-forming substrate, and the heating component 1 can be a microwave heating component or a laser heating component. The power supply 4 is used to provide power to the heating component 1. The puff detection component 3 is used to detect whether a puff action has occurred. The control component 2 is configured as follows:

[0093] preheating step: upon receiving a heating start signal, controlling the heating component to heat the aerosol-forming substrate so that the aerosol-forming substrate is first raised from an initial temperature to a first temperature;

[0094] a heating step: upon detecting the start of a puff, controlling the heating assembly to heat the aerosol-forming substrate so as to raise the aerosol-forming substrate from a current temperature to a third temperature, wherein the third temperature is greater than or equal to the first temperature;

[0095] Cooling step: upon detecting the end of the puffing action, controlling the heating component to heat the aerosol-forming substrate so as to cool the aerosol-forming substrate from a current temperature to a fourth temperature, wherein the fourth temperature is lower than the third temperature.

[0096] Furthermore, in an optional embodiment, the control component is configured to: in the heating step, if the first puff action is not detected within a preset time, control the heating component to drop from the first temperature to a second temperature, wherein the second temperature is less than or equal to the first temperature.

[0097] Further, in an optional embodiment, the control component is configured such that: the fourth temperature is greater than or equal to the second temperature.

[0098] Furthermore, in an optional embodiment, the control component is configured such that: the difference between the fourth temperature and the third temperature is 5 to 10 degrees; and / or the difference between the second temperature and the first temperature is 5 to 10 degrees.

[0099] Furthermore, in an optional embodiment, the control component is configured to: in the heating step, determine the third temperature based on the current total number of puffs, wherein the third temperature is positively correlated with the current total number of puffs; and in the cooling step, determine the fourth temperature based on the current total number of puffs, wherein the fourth temperature is positively correlated with the current total number of puffs.

[0100] Furthermore, in an optional embodiment, the control component is configured as follows: the heating step includes a temperature raising sub-step and a temperature controlling sub-step, wherein:

[0101] a heating sub-step: upon detecting the start of a puffing action, controlling the heating component to heat the aerosol-forming substrate at a first preset power within a first time period;

[0102] The temperature control sub-step continues after the first time period: if the current temperature is determined to be lower than the third temperature, the heating component is controlled to heat at a second preset power during a second time period; if the current temperature is determined to be higher than the third temperature, the heating component is controlled to stop heating during the third time period; the second preset power is lower than the first preset power. The second and third time periods may be the same or different. It should also be noted that because the duration of a single puff (e.g., 1-2 seconds) minus the constant power heating time (the first time period, e.g., 350 ms) is significantly longer than the temperature detection period (e.g., 20-30 ms), the temperature control sub-step may repeat multiple cycles of temperature determination and power adjustment. For example, if a user's puff lasts 1 second, the first time period is 350 ms, the corresponding remaining time is 650 ms, and the temperature detection period is 30 ms, the temperature control sub-step will perform approximately 22 temperature determinations and power adjustments.

[0103] In this embodiment, the control component controls the heating component by first heating at a constant power (a first preset power) for a period of time (a first period of time) and then periodically determining the temperature and adjusting the power. Therefore, compared to conventional PID control schemes, this control scheme can reduce noise in the heat-without-combustion device because the differentiator in a PID control scheme is sensitive to high-frequency signals generated by a microwave heating component or a laser heating component and tends to amplify noise signals. Furthermore, in an alternative embodiment, the heating component 1 is a microwave heating component. Referring to Figures 6A and 6B, in this embodiment, a microwave field is generated within the cavity 113 of the microwave heating component 1 that acts on an aerosol-forming substrate 200, thereby achieving microwave heating. The aerosol-forming substrate 200 is a solid aerosol-forming substrate, such as a processed plant leaf product. It is understood that in other embodiments, the aerosol-forming substrate 200 may also be a liquid aerosol-forming substrate.

[0104] As shown in FIG6A , the overall shape of the microwave heating assembly 1 is generally cylindrical in some embodiments. Of course, the microwave heating assembly 1 is not limited to a cylindrical shape and may also be in other shapes, such as a square column or an elliptical column. Referring to FIG6B , the microwave heating assembly 1 may include an outer conductor unit 11, an inner conductor unit 12, a receiving seat 13, a microwave generating unit (not shown), and a microwave feeding unit 14.

[0105] The outer conductor unit 11 has a closed end 111 and an open end 112 opposite the closed end 111, defining a semi-enclosed cavity 113. The inner wall of the cavity 113 is electrically conductive. The inner conductor unit 12 includes a microwave matching structure 121 and a microwave radiating structure 122 coupled to the microwave matching structure 121. The bottom of the microwave matching structure 121 is connected to the closed end 111 of the outer conductor unit 11 and makes ohmic contact with the end wall of the closed end 111, forming the short-circuit end of the microwave heating assembly 1. One end of the microwave radiating structure 122 is coupled to the top of the microwave matching structure 121. The other end of the microwave radiating structure 122 is located in the cavity 113 but does not directly contact the outer conductor unit 11, forming the open-circuit end of the microwave heating assembly 1. The microwave feeding unit 14 is detachably mounted on the outer conductor unit 11 and is used to feed microwaves generated by the microwave generating unit into the cavity 113. The receiving seat 13 is fixedly or removably mounted at the open end 112 of the outer conductor unit 11 and defines a receiving cavity 130 for receiving the aerosol-forming substrate 200. The microwave radiating structure 122 extends into the receiving cavity 130 at one end thereof remote from the microwave matching structure 121. The receiving seat 13 may comprise a receiving portion and a fixing portion integrally connected to the receiving portion. The receiving portion may be cylindrical, having an outer diameter smaller than the inner diameter of the outer conductor unit 11. The receiving portion is mounted in the cavity 113 and defines an axial receiving cavity 130 for receiving the aerosol-forming substrate 200. The bottom of the receiving portion is closed, having a bottom wall 1311 for supporting the aerosol-forming substrate 200.

[0106] It is understood that the aerosol-forming substrate 200 can be partially or completely inserted into the receiving cavity 130, in which case a portion of the microwave radiating structure 122 is inserted into the interior of the aerosol-forming substrate 200. When the microwave generating unit feeds microwaves via the microwave feeding unit 14, a microwave energy field is formed around the microwave radiating structure 122, heating the interior of the aerosol-forming substrate 200. The user's puffing action drives airflow, and an aerosol formed by mixing air and the heated medium is conveyed along the airflow into the user's oral cavity.

[0107] Furthermore, to control the microwave energy field distribution so that the microwave energy field distribution of the aerosol-forming substrate is more biased toward the bottom of the aerosol-forming substrate, the microwave heating assembly further includes a microwave field regulating structure (not shown) disposed within the cavity 113. The microwave field regulating structure is integrally bonded to, or in ohmic contact with, the inner peripheral sidewall of the outer conductor unit 11. The microwave field regulating structure surrounds the periphery of the receiving cavity 130 and includes a top wall facing the open end 112. The top wall is closer to the closed end 111 than the first free end. In other words, the top of the microwave field regulating structure 15 is lower in height than the end of the microwave radiating structure 122 adjacent to the open end 112.

[0108] Furthermore, in an optional embodiment, the heating component is a laser heating component, and the laser heating component includes a circuit board and a laser chip mounted on the circuit board, and the laser chip is used to emit laser light toward the aerosol-forming substrate.

[0109] Furthermore, the heating without burning device of the present invention may also include a rotating component for driving at least one of the aerosol-forming substrate and the heating component to rotate so as to adjust the laser irradiation area of ​​the heating component on the aerosol-forming substrate.

[0110] Furthermore, in an optional embodiment, the puff detection component includes a first air pressure sensor, which is used to detect whether a puff action occurs by detecting the air pressure in the airway.

[0111] In another optional embodiment, the puff detection component includes a second air pressure sensor for detecting whether a puff action has occurred by detecting air pressure in the airway, and detecting the puff force when a puff action occurs. Furthermore, the control component is further configured to: obtain the first time period based on the puff force, wherein the first time period is positively correlated with the puff force. For example, in one specific example, if the puff force of the current puff is less than a preset value, then in the heating sub-step, the heating component is controlled to heat the aerosol-forming substrate at a first preset power (e.g., 20W) for 350ms. If the puff force of the current puff is greater than or equal to the preset value, the heating component is controlled to heat the aerosol-forming substrate at the first preset power (e.g., 20W) for 550ms.

[0112] In the above embodiment, the first or second air pressure sensor can be mounted inside or on the outer surface of the cavity to detect changes in air pressure in the airway during aerosol generation by the heat-not-burn device. After preheating, the heat-not-burn device dynamically adjusts the temperature control curve during aerosol generation by detecting the user's puffs.

[0113] In a specific embodiment, as shown in Figure 7, the control component is an MCU U1, the trigger interrupt pin (INT) of the pressure sensor U2 is connected to the first pin of the MCU U1, and the frequency output pin (FREQ) of the pressure sensor U2 is connected to the second pin of the MCU U1. In addition, the trigger interrupt pin of the pressure sensor U2 is also connected to the power supply voltage through a resistor, the power supply pin (VDD) of the pressure sensor U2 is also connected to the power supply voltage, the ground pin (GND) of the pressure sensor U2 is grounded, and a capacitor is also connected between the power supply pin and the ground pin of the pressure sensor U2.

[0114] The trigger pressure threshold of the air pressure sensor U2 can be set at the factory, for example, to 200 Pa. During use, if the user puffs, the air pressure in the airway changes. The air pressure sensor U2 detects this pressure change and outputs a corresponding interrupt trigger signal and frequency signal. MCU U1 can then detect this signal to determine whether the user has puffed. Specifically, when the air pressure sensor U2 detects a pressure of 200 Pa or greater, its trigger interrupt pin outputs a high level; otherwise, the pin remains low. MCU U1 can then determine whether a puff has occurred based on the high and low levels of its first pin. Furthermore, after the pressure threshold is triggered, the frequency output pin of the air pressure sensor U2 outputs a base frequency (for example, 2 kHz). For every subsequent increase of 200 Pa, the frequency output pin increases by a specific percentage, for example, by 3%. MCU U1 can then determine the user's puffing intensity based on the frequency signal input to its second pin.

[0115] When the MCU U1 controls the heating element based on whether the user is puffing, it adjusts the heating element's output power to ensure the aerosol-forming matrix reaches the target temperature, regardless of whether the user is puffing. Furthermore, because the heating element utilizes microwave or laser heating, when the user puffs, it quickly outputs a high power value to rapidly heat the aerosol-forming matrix, ensuring aerosol production during the user's puff. When the user is not puffing, the power is lowered by 5-10 degrees Celsius to reduce power consumption.

[0116] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of the claims.

Claims

1. A heating control method for a heating without burning device, wherein the heating without burning device comprises a heating component, wherein the heating component is a microwave heating component or a laser heating component, wherein: include: Preheating step: upon receiving a heating start signal, controlling the heating component to heat the aerosol-forming substrate, so that the aerosol-forming substrate is first heated from an initial temperature to a first temperature; Heating step: when the start of the puffing action is detected, controlling the heating component to heat the aerosol-forming substrate so that the aerosol-forming substrate is increased from a current temperature to a third temperature, wherein the third temperature is greater than or equal to the first temperature; Cooling step: when the end of the puffing action is detected, the heating component is controlled to heat the aerosol-forming substrate so that the aerosol-forming substrate is cooled from the current temperature to a fourth temperature, wherein the fourth temperature is lower than the third temperature.

2. The heating control method of the heat-not-burn device according to claim 1, characterized in that: The heating step further comprises: If the first puff action is not detected within a preset time, the heating component is controlled to drop from the first temperature to a second temperature, wherein the second temperature is less than or equal to the first temperature.

3. The heating control method of the heating without burning device according to claim 2, characterized in that: The fourth temperature is greater than or equal to the second temperature.

4. The heating control method of the heat-not-burn device according to claim 1, characterized in that: The heating step further comprises: The third temperature is determined according to the current total number of puffs, wherein the third temperature is positively correlated with the current total number of puffs.

5. The heating control method of the heat-not-burn device according to claim 1, characterized in that: The cooling step further comprises: The fourth temperature is determined according to the current total number of puffs, wherein the fourth temperature is positively correlated with the current total number of puffs.

6. The heating control method of the heat-not-burn device according to claim 2, characterized in that: The difference between the fourth temperature and the third temperature is 5 to 10 degrees; and / or the difference between the second temperature and the first temperature is 5 to 10 degrees.

7. The heating control method of the heat-not-burn device according to claim 1, characterized in that: The heating step comprises: Heating sub-step: when the start of the puffing action is detected, controlling the heating component to heat the aerosol-forming substrate at a first preset power within a first time period; Temperature control sub-step: after the first time period ends, if it is determined that the current temperature is lower than the third temperature, the heating component is controlled to heat at a second preset power within a second time period; if it is determined that the current temperature is higher than the third temperature, the heating component is controlled to stop heating within a third time period; wherein the second preset power is less than the first preset power.

8. A heat-not-burn device, characterized in that: include: A heating component for heating the aerosol-forming substrate, wherein the heating component is a microwave heating component or a laser heating component; a power source for providing power supply to the heating assembly; A suction detection component for detecting whether a suction action occurs; A control component, wherein the control component is configured to: Preheating step: upon receiving a heating start signal, controlling the heating component to heat the aerosol-forming substrate, so that the aerosol-forming substrate is first heated from an initial temperature to a first temperature; Heating step: when the start of the puffing action is detected, controlling the heating component to heat the aerosol-forming substrate so that the aerosol-forming substrate is increased from a current temperature to a third temperature, wherein the third temperature is greater than or equal to the first temperature; Cooling step: when the end of the puffing action is detected, the heating component is controlled to heat the aerosol-forming substrate so that the aerosol-forming substrate is cooled from the current temperature to a fourth temperature, wherein the fourth temperature is lower than the third temperature.

9. The heating without burning device according to claim 8, characterized in that: The heating component is a microwave heating component, and the microwave heating component comprises: An outer conductor unit (11), wherein the outer conductor unit (11) comprises a closed end (111) and an open end (112) opposite to the closed end (111); a receiving cavity (130) disposed in the outer conductor unit (11) and used for receiving an aerosol-forming matrix; A microwave generating unit, used for generating microwave signals; A microwave feeding unit, used for feeding the microwave signal generated by the microwave generating unit; An inner conductor unit, wherein the inner conductor unit comprises a microwave matching structure (121) and a microwave radiating structure (122) coupled to the microwave matching structure (121), wherein the bottom of the microwave matching structure (121) is connected to the closed end (111) of the outer conductor unit (11), and is in ohmic contact with the end wall of the closed end (111), thereby forming a short-circuit end of the microwave heating component; and one end of the microwave radiating structure (122) is coupled to the top of the microwave matching structure (121), and the other end of the microwave radiating structure (122) is located in the accommodating cavity (130), thereby forming an open-circuit end of the microwave heating component.

10. The heat-without-burning device according to claim 8, characterized in that: The heating component is a laser heating component, and the laser heating component includes: A circuit board and a laser chip mounted on the circuit board, wherein the laser chip is used to emit laser light to the aerosol-forming substrate.

11. The heat-without-burning device according to claim 8, characterized in that: The control component is configured as follows: the heating step includes a temperature raising sub-step and a temperature controlling sub-step, wherein: Heating sub-step: when the start of the puffing action is detected, controlling the heating component to heat the aerosol-forming substrate at a first preset power within a first time period; Temperature control sub-step: After the first time period ends, continue: if it is judged that the current temperature is lower than the third temperature, control the heating component to heat with a second preset power in the second time period; if it is judged that the current temperature is higher than the third temperature, control the heating component to stop heating in the third time period; wherein the second preset power is less than the first preset power.

12. The heat-not-burn device according to claim 8, characterized in that: The suction detection component comprises: The first air pressure sensor is used to detect whether a suction action occurs by detecting the air pressure in the airway.

13. The heat-without-burning device according to claim 11, characterized in that: The suction detection component comprises: a second air pressure sensor, used to detect whether a suction action occurs by detecting the air pressure in the airway, and to detect the suction force when a suction action occurs; Furthermore, the control component is further configured to: The first time period is acquired according to the suction force, wherein the first time period is positively correlated with the suction force.

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