An aerosol-generating system and a heating control method thereof

Abstract

The application provides an aerosol generating system and a heating control method thereof. The method comprises the following steps: detecting an initial temperature of a heating module; obtaining a first parameter stored in advance according to the initial temperature, and obtaining a second parameter stored in advance according to a preset holding time; obtaining a first temperature according to the first parameter and a preset expected temperature; obtaining a second temperature according to the first temperature and the second parameter; controlling the heating module to work, starting at the moment when the temperature of the heating module reaches the first temperature, and gradually reducing the temperature of the heating module, so that the temperature of the heating module reaches the second temperature after the holding time. By controlling the heating module, the hysteresis of temperature change is solved, the temperature of the air at the tail end of the cigarette is kept constant, and the taste of the user is improved.

Description

Technical Field

[0001] This application relates to the field of aerosol generation technology, and in particular to an aerosol generation system and its heat generation control method. Background Technology

[0002] Aerosol generation systems typically consist of an aerosol generator and an aerosol product. The aerosol product is inserted into the aerosol generator, where a heating module heats and bakes it, generating aerosols for the user to inhale. Existing aerosol generators using air heating do not directly heat the aerosol product; instead, they heat the surrounding air, using the high-temperature air to heat the aerosol product. When the user inhales, the generated aerosol mixes with the high-temperature air and is inhaled. There is a certain distance between the heating module and the aerosol product. Temperature control of the heating device generally involves detecting the resistance of the heating element and using TCR (temperature coefficient of resistance, representing the relative change in resistance when the temperature changes by 1°C) for temperature control. Therefore, there is a temperature difference between the heating element of the aerosol generator and the heated part of the aerosol product. The heat transfer from the heating element to the aerosol product is delayed, resulting in inaccurate temperature control and affecting the user's inhalation experience. Summary of the Invention

[0003] The purpose of this application is to overcome the shortcomings of the prior art and provide an aerosol generation system and its heating control method to solve the problem of insufficient temperature control in the prior art when electronic cigarettes are in the heat preservation stage.

[0004] To address the aforementioned problems, a first aspect of this application provides a method for controlling the heat generation of an aerosol generation system, the method comprising:

[0005] Detect the initial temperature of the heating module;

[0006] The first parameter is obtained based on the initial temperature, and the second parameter is obtained based on the preset heat preservation time.

[0007] The first temperature is obtained based on the first parameter and the preset desired temperature;

[0008] The second temperature is obtained based on the first temperature and the second parameter;

[0009] The heating module is controlled to operate. When the temperature of the heating module reaches the first temperature, the temperature of the heating module is gradually reduced so that after the heat preservation time, the temperature of the heating module reaches the second temperature.

[0010] In one optional implementation, the first parameter includes a first compensation coefficient, wherein the method for obtaining the first compensation coefficient includes:

[0011] Record the initial temperature and control the heating module to work for a first preset duration, which is less than 20 seconds;

[0012] Obtain the temperature of the preset area and set this temperature as the first detection temperature;

[0013] The first compensation coefficient is obtained based on the desired temperature and the first detection temperature.

[0014] In one optional implementation, the first parameter further includes a second compensation coefficient, wherein the method for obtaining the second compensation coefficient includes:

[0015] The heating module is controlled to operate for a second preset duration, wherein the second preset duration is greater than 5 minutes;

[0016] Obtain the temperature of the preset area and set this temperature as the second detection temperature;

[0017] The second compensation coefficient is obtained based on the desired temperature and the second detection temperature.

[0018] In one optional implementation, the first parameter further includes a third compensation coefficient, wherein the method for obtaining the third compensation coefficient includes:

[0019] Record the current time t11 and control the operation of the heating module;

[0020] When the temperature of the heating module reaches the desired temperature, record the current time t12;

[0021] Once the temperature of the heating module reaches the desired temperature, the heating module is controlled to stop working.

[0022] Monitor the temperature of the target area, and record the current time t13 when the target area reaches its maximum value;

[0023] The third compensation coefficient is obtained based on the second detection duration and the first detection duration, wherein the first detection duration is t12-t11 and the second detection duration is t13-t11.

[0024] In one optional implementation, the first parameter is equal to the product of the first compensation coefficient, the second compensation coefficient, and the third compensation coefficient.

[0025] A second aspect of this application provides an aerosol generation system, comprising:

[0026] The detection module is used to detect the initial temperature of the heating module;

[0027] The acquisition module is used to acquire a pre-stored first parameter based on the initial temperature and a pre-stored second parameter based on the preset heat preservation time.

[0028] The calculation module is used to obtain a first temperature based on the first parameter and a preset desired temperature, and to obtain a second temperature based on the first temperature and the second parameter.

[0029] The control module is used to control the operation of the heating module. When the temperature of the heating module reaches the first temperature, the module gradually decreases its temperature so that after the heat preservation time, the temperature of the heating module reaches the second temperature.

[0030] In one optional implementation, the first parameter includes a first compensation coefficient, wherein the aerosol generation system further includes a first obtaining module for obtaining the first compensation coefficient, the first obtaining module being used for...

[0031] Record the initial temperature and control the heating module to work for a first preset duration, which is less than 20 seconds; obtain the temperature of the preset area and set this temperature as the first detection temperature; obtain the first compensation coefficient based on the desired temperature and the first detection temperature.

[0032] In one optional implementation, the first parameter further includes a second compensation coefficient, wherein the aerosol generation system further includes a second obtaining module for obtaining the second compensation coefficient, the second obtaining module being used for

[0033] The heating module is controlled to operate for a second preset duration, wherein the second preset duration is greater than 5 minutes; the temperature of the preset area is obtained and set as the second detection temperature; the second compensation coefficient is obtained based on the desired temperature and the second detection temperature.

[0034] In one optional implementation, the first parameter further includes a third compensation coefficient, wherein the aerosol generation system further includes a third obtaining module for obtaining the third compensation coefficient, the third obtaining module being used for...

[0035] Record the current time t11 and control the heating module to work; when the temperature of the heating module reaches the desired temperature, record the current time t12; after the temperature of the heating module reaches the desired temperature, control the heating module to stop working; monitor the temperature of the target area, and when the target area reaches its maximum value, record the current time t13; obtain the third compensation coefficient based on the second detection duration and the first detection duration, wherein the first detection duration is t12-t11 and the second detection duration is t13-t11;

[0036] Wherein, the first parameter is equal to the product of the first compensation coefficient, the second compensation coefficient, and the third compensation coefficient.

[0037] The beneficial effects of this application are:

[0038] By controlling the heating module, the heating module is heated according to the first temperature. After the first temperature is reached, the heating module is heated according to the second temperature and the preset heat preservation time. This solves the problem of the lag in temperature change and keeps the temperature of the air at the end of the cigarette constant, thereby improving the user's smoking experience. Attached Figure Description

[0039] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0040] Figure 1 A schematic cross-sectional view of the heating module of an aerosol generation system is shown.

[0041] Figure 2 The temperature curves of the heating conductor and the target area are shown when the temperature is controlled by the TCR of the heating conductor itself.

[0042] Figure 3 A flowchart of a method for controlling the heat generation of an aerosol generation system is shown.

[0043] Figure 4 The following diagram illustrates the temperature curves of the heating conductor and the target area during temperature control using a heating control method employing an aerosol generation system.

[0044] Figure 5 A structural diagram of an aerosol generation system is shown.

[0045] Explanation of key component symbols:

[0046] 1-Cigarette stick; 2-Supporting component; 3-Target area; 4-Wire; 5-Ceramic body;

[0047] 110 - Detection module; 210 - Acquisition module; 310 - Calculation module; 410 - Control module. Detailed Implementation

[0048] The embodiments of this application will now be described with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the protection scope of this application.

[0049] like Figure 1 The image shown is a schematic diagram of the structure of an electronic cigarette.

[0050] When the electronic cigarette is in operation, the heating module is powered on. At this time, the strip-shaped heating conductor in the heating module heats up, thereby heating the honeycomb ceramic body 5. The air inside the honeycomb ceramic body 5 is heated, and the hot air flows to the tail end of the cigarette stick 1, heating the cigarette stick 1 and generating an aerosol.

[0051] The heating module includes a strip-shaped heating conductor and a honeycomb-shaped ceramic body 5. A wire 4 is electrically connected to the heating conductor via an air passage inside the electronic cigarette.

[0052] During the heating and temperature transfer process, the heating conductor is first energized and heated; the heating conductor transfers the temperature to the ceramic body 5; the cold air flowing through the ceramic body 5 is heated, thereby generating hot air; the hot air reaches the preset area (i.e., the tail end of the cigarette 1), thereby achieving the heating of the cigarette 1.

[0053] The heating module itself is heavy. When the heating module is heated, the support component 2 that comes into contact with the electronic cigarette and the heating module, as well as the heating module itself, will absorb a certain amount of heat.

[0054] The heating module is surrounded by insulation components, which have a certain heat preservation capacity. When the heating module stops heating, the temperature drops slowly.

[0055] Reference Figure 1 The preset area (i.e., the end of cigarette 1) is the target area 3 for temperature control. Inaccurate temperature control in the preset area will result in a poor smoking experience.

[0056] Because the temperature is controlled by the TCR of the heating conductor itself, there is a large difference between the temperature of the heating conductor and the temperature of the target area 3, resulting in temperature difference and hysteresis.

[0057] Temperature control using the temperature coefficient (TCR) of the heating conductor itself refers to controlling the temperature by utilizing the change in its own resistance. This requires determining the resistance of the heating conductor at a reference temperature (25°C) and its own TCR value (TCR is short for temperature coefficient, which represents the relative change in resistance when the temperature changes by 1 degree).

[0058] T = (Rt - R0) * (R0 * TCR) - 25℃ ………… Formula (1); where,

[0059] R0: The resistance of the heating conductor at the reference temperature (25℃);

[0060] Rt: Target resistance value;

[0061] T: Temperature rise of the heating conductor.

[0062] like Figure 2 As shown, curve A (heat conductor temperature) is a typical preheating curve. The horizontal axis represents time, and the vertical axis represents temperature converted by TCR. 0-t1 is the rapid heating stage, and t1-t3 is the holding stage after reaching the preset temperature. T is the target preheating temperature, T3′ is the temperature of target region 3 after reaching the target preheating temperature, and T3″ is the temperature of target region 3 after the preheating is completed.

[0063] After the power is turned on, the heating conductor begins to heat up. After time t1, it reaches the set temperature T and then begins to maintain the temperature until t3. Once preheating is complete, the temperature begins to drop.

[0064] Curve B represents the temperature curve of target region 3. From t3 and t4, it can be observed that after the temperature of the heating conductor decreases, the temperature of target region 3 does not immediately decrease; there is a significant lag, typically greater than 3 seconds. From t3 to t1, it can be seen that the temperature of the heating conductor develops horizontally, while the temperature of target region 3 develops curvilinearly, gradually increasing in temperature. The heating conductor reaches its maximum preheating temperature T at time t1, but the temperature of target region 3 reaches T3′ due to heat dissipation and lag. At time t3, when the heat preservation process ends, the temperature of the heating conductor is still T, but the temperature of target region 3 has reached T3″.

[0065] When the machine is started up cold (i.e., the temperature of the heating module is the same as the room temperature), T3′ and T3″ will be colder due to heat dissipation.

[0066] Example

[0067] To address the issue of temperature delay and subsequent temperature instability in target region 3 caused by using the heating conductor's own TCR for temperature control, refer to... Figure 3 In this embodiment, a method for controlling the heat generation of an aerosol generation system is proposed. The steps of this method include:

[0068] S100, detects the initial temperature of the heating module;

[0069] S200: Obtain the first pre-stored parameter based on the initial temperature, and obtain the second pre-stored parameter based on the preset heat preservation time;

[0070] S300, obtains a first temperature based on a first parameter and a preset desired temperature, and obtains a second temperature based on the first temperature and a second parameter;

[0071] S400 controls the operation of the heating module. When the temperature of the heating module reaches the first temperature, the temperature of the heating module is gradually reduced so that after the heat preservation time, the temperature of the heating module reaches the second temperature.

[0072] In step S100, the initial temperature of the heating module is actually the initial temperature of the heating conductor.

[0073] After calculating the temperature T according to formula (1), the temperature T is the preset desired temperature after compensation.

[0074] In step S300, the first temperature is equal to the product of the first parameter and the desired temperature, and the second temperature is equal to the product of the second parameter and the first temperature.

[0075] Different electronic cigarettes require different heat preservation times at the factory or during user use. Because of these differences in heat preservation time, the required temperature compensation also varies. In this embodiment, the following operations can be performed to obtain the second parameter;

[0076] Power is applied to the heating module, causing it to heat up.

[0077] When the temperature of the heating module reaches the desired temperature, the current is controlled to keep the temperature of the heating module at temperature T for a certain period of time, which is less than 20 seconds.

[0078] After the heat preservation is completed, the temperature value calculated by TCR is different from the actual temperature of the target area 3. At this time, the heating element is driven to the target temperature, and the heat preservation time is t. The temperature difference is recorded to solve for the second parameter, which is stored in the memory.

[0079] Since the initial temperatures of the heating modules differ, in this embodiment, the first parameter includes a first compensation coefficient, wherein the method for obtaining the first compensation coefficient includes:

[0080] Record the initial temperature and control the heating module to work for a first preset duration, which is less than 20 seconds;

[0081] Obtain the temperature of the preset area and set this temperature as the first detection temperature;

[0082] The first compensation coefficient is obtained based on the difference between the desired temperature and the first detection temperature.

[0083] The first compensation coefficient corresponds one-to-one with the initial temperature of the heating module. When the initial temperature is different, the corresponding first compensation system is also different. The first compensation coefficient can be obtained through experiments and calculations in the manner described above. The correspondence and value between the first compensation system and the initial temperature can be stored in the electronic cigarette's memory.

[0084] Different models of electronic cigarettes use different materials for the support body, the mass of the heating module, and other parameters. Therefore, in this embodiment, the first parameter also includes a second compensation coefficient, wherein the method for obtaining the second compensation coefficient includes:

[0085] The heating module is controlled to operate for a second preset duration, wherein the second preset duration is greater than 5 minutes;

[0086] Obtain the temperature of the preset area and set that temperature as the second detection temperature;

[0087] The second compensation coefficient is obtained based on the difference between the desired temperature and the second detection temperature.

[0088] The second compensation coefficient is related to parameters such as the material of the support and the mass of the heating module. For the same model of electronic cigarette, the corresponding second compensation coefficient is the same. The second compensation coefficient can be stored in the electronic cigarette's memory.

[0089] Different models of electronic cigarettes have different heat transfer path lengths, resulting in varying times for cold air to flow through the ceramic body 5, which in turn leads to a lag in temperature transfer. Therefore, in this embodiment, the first parameter also includes a third compensation coefficient, wherein the method for obtaining the third compensation coefficient includes:

[0090] Record the current time t11 and control the operation of the heating module;

[0091] When the temperature of the heating module reaches the desired temperature, record the current time t12;

[0092] Once the temperature of the heating module reaches the desired temperature, control the heating module to stop working.

[0093] Monitor the temperature of target area 3, and record the current time t13 when target area 3 reaches its maximum value;

[0094] The third compensation coefficient is obtained based on the difference between the second detection duration and the first detection duration, where the first detection duration is t12-t11 and the second detection duration is t13-t11.

[0095] The third compensation coefficient is related to the rated length of the heat transfer path, and the corresponding third compensation coefficient is the same for the same model of electronic cigarette. The third compensation coefficient can be stored in the electronic cigarette's memory.

[0096] In this embodiment, the first parameter is equal to the product of the first compensation coefficient, the second compensation coefficient, and the third compensation coefficient.

[0097] Reference Figure 4 Taking cold start-up as an example. During cold start-up, when the target temperature T is reached, the temperature T3′ in target region 3 is too low. Therefore, the various compensation coefficients cause T′ to increase, and T3′ increases accordingly. During heat preservation, due to temperature lag, the temperature T3″ at point 3 gradually increases. Therefore, the effect of the compensation of various parameters causes T″ to decrease, and T3″ decreases accordingly. The final result is that the temperature of target region 3 is compensated after the temperature calculated by TCR reaches the target temperature, and the temperature of target region 3 remains stable during the heat preservation stage.

[0098] Based on the fever control methods described above, such as Figure 5 As shown, in this embodiment, an aerosol generation system is also proposed, comprising:

[0099] Detection module 110 is used to detect the initial temperature of the heating module;

[0100] The acquisition module 210 is used to acquire a pre-stored first parameter based on the initial temperature and a pre-stored second parameter based on the preset heat preservation time.

[0101] The calculation module 310 is used to obtain a first temperature based on a first parameter and a preset desired temperature, and to obtain a second temperature based on the first temperature and a second parameter.

[0102] The control module 410 is used to control the operation of the heating module. When the temperature of the heating module reaches the first temperature, the temperature of the heating module is gradually reduced so that after the heat preservation time, the temperature of the heating module reaches the second temperature.

[0103] In this embodiment, the first temperature is equal to the product of the first parameter and the desired temperature, and the second temperature is equal to the product of the second parameter and the first temperature.

[0104] Furthermore, the first parameter includes a first compensation coefficient, wherein the aerosol generation system further includes a first obtaining module for obtaining the first compensation coefficient. The first obtaining module is used for...

[0105] Record the initial temperature and control the heating module to work for a first preset time, which is less than 20 seconds; obtain the temperature of the preset area and set this temperature as the first detection temperature; obtain the first compensation coefficient by the difference between the expected temperature and the first detection temperature.

[0106] Furthermore, the first parameter also includes a second compensation coefficient, wherein the aerosol generation system further includes a second obtaining module for obtaining the second compensation coefficient. The second obtaining module is used for...

[0107] The heating module is controlled to operate for a second preset duration, wherein the second preset duration is greater than 5 minutes; the temperature of a preset area is obtained and set as the second detection temperature; and a second compensation coefficient is obtained by the difference between the desired temperature and the second detection temperature.

[0108] Furthermore, the first parameter also includes a third compensation coefficient, wherein the aerosol generation system further includes a third acquisition module for obtaining the third compensation coefficient. The third acquisition module is used for...

[0109] Record the current time t11 and control the heating module to work; when the temperature of the heating module reaches the desired temperature, record the current time t12; after the temperature of the heating module reaches the desired temperature, control the heating module to stop working; monitor the temperature of target area 3, and when target area 3 reaches the maximum value, record the current time t13; obtain the third compensation coefficient by the difference between the second detection duration and the first detection duration, where the first detection duration is t12-t11 and the second detection duration is t13-t11.

[0110] In this embodiment, the first parameter is equal to the product of the first compensation coefficient, the second compensation coefficient, and the third compensation coefficient.

[0111] In this embodiment, a readable storage medium is also proposed, on which a computer program is stored, which, when executed by a processor, implements the heat control method as described above.

[0112] In this embodiment, an electronic cigarette is also proposed, including a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that the processor implements the heat control method as described above when executing the computer program.

[0113] The terms “first,” “second,” etc. (if present) in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a particular order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms “comprising” and “having,” and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

Claims

1. A method for controlling the heat generation of an aerosol generation system, characterized in that, include: Detect the initial temperature of the heating module; The first parameter is obtained based on the initial temperature, and the second parameter is obtained based on the preset heat preservation time. The first temperature is obtained based on the first parameter and the preset desired temperature; The first parameter includes a first compensation coefficient, wherein the method for obtaining the first compensation coefficient includes: Record the initial temperature and control the heating module to work for a first preset duration, which is less than 20 seconds; Obtain the temperature of the preset area and set this temperature as the first detection temperature; The first compensation coefficient is obtained based on the desired temperature and the first detected temperature; The second temperature is obtained based on the first temperature and the second parameter; The heating module is controlled to operate. When the temperature of the heating module reaches the first temperature, the temperature of the heating module is gradually reduced so that after the heat preservation time, the temperature of the heating module reaches the second temperature.

2. The method for controlling the heat generation of an aerosol generation system according to claim 1, characterized in that, The first parameter further includes a second compensation coefficient, wherein the method for obtaining the second compensation coefficient includes: The heating module is controlled to operate for a second preset duration, wherein the second preset duration is greater than 5 minutes; Obtain the temperature of the preset area and set this temperature as the second detection temperature; The second compensation coefficient is obtained based on the desired temperature and the second detection temperature.

3. The method for controlling the heat generation of an aerosol generation system according to claim 2, characterized in that, The first parameter further includes a third compensation coefficient, wherein the method for obtaining the third compensation coefficient includes: Record the current time t11 and control the operation of the heating module; When the temperature of the heating module reaches the desired temperature, record the current time t12; Once the temperature of the heating module reaches the desired temperature, the heating module is controlled to stop working. Monitor the temperature of the target area, and record the current time t13 when the target area reaches its maximum value; The third compensation coefficient is obtained based on the second detection duration and the first detection duration, wherein the first detection duration is t12-t11 and the second detection duration is t13-t11.

4. The method for controlling the heat generation of an aerosol generation system according to claim 3, characterized in that, The first parameter is equal to the product of the first compensation coefficient, the second compensation coefficient, and the third compensation coefficient.

5. An aerosol generation system, characterized in that, include: The detection module is used to detect the initial temperature of the heating module; The acquisition module is used to acquire a pre-stored first parameter based on the initial temperature and a pre-stored second parameter based on the preset heat preservation time. The calculation module is used to obtain a first temperature based on the first parameter and a preset desired temperature, the first parameter including a first compensation coefficient, and to record the initial temperature, and to control the heating module to work for a first preset duration, the first preset duration being less than 20 seconds; The temperature of a preset area is obtained and set as the first detection temperature; the first compensation coefficient is obtained based on the desired temperature and the first detection temperature; and a second temperature is obtained based on the first temperature and the second parameter. The control module is used to control the operation of the heating module. When the temperature of the heating module reaches the first temperature, the module gradually decreases its temperature so that after the heat preservation time, the temperature of the heating module reaches the second temperature.

6. The aerosol generation system according to claim 5, characterized in that, The first parameter further includes a second compensation coefficient, wherein the aerosol generation system further includes a second obtaining module for obtaining the second compensation coefficient, the second obtaining module being used for The heating module is controlled to operate for a second preset duration, wherein the second preset duration is greater than 5 minutes; the temperature of the preset area is obtained and set as the second detection temperature; the second compensation coefficient is obtained based on the desired temperature and the second detection temperature.

7. The aerosol generation system according to claim 6, characterized in that, The first parameter further includes a third compensation coefficient, wherein the aerosol generation system further includes a third obtaining module for obtaining the third compensation coefficient, the third obtaining module being used for Record the current time t11 and control the heating module to work; when the temperature of the heating module reaches the desired temperature, record the current time t12; after the temperature of the heating module reaches the desired temperature, control the heating module to stop working; monitor the temperature of the target area, and when the target area reaches its maximum value, record the current time t13; obtain the third compensation coefficient based on the second detection duration and the first detection duration, wherein the first detection duration is t12-t11 and the second detection duration is t13-t11; Wherein, the first parameter is equal to the product of the first compensation coefficient, the second compensation coefficient, and the third compensation coefficient.

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