CN118680337A - Control method for aerosol-generating device and aerosol-generating device - Google Patents
Control method for aerosol-generating device and aerosol-generating device Download PDFInfo
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- CN118680337A CN118680337A CN202310325156.6A CN202310325156A CN118680337A CN 118680337 A CN118680337 A CN 118680337A CN 202310325156 A CN202310325156 A CN 202310325156A CN 118680337 A CN118680337 A CN 118680337A
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Classifications
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- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24F—SMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES
- A24F40/00—Electrically operated smoking devices; Component parts thereof; Manufacture thereof; Maintenance or testing thereof; Charging means specially adapted therefor
- A24F40/20—Devices using solid inhalable precursors
-
- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24F—SMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES
- A24F40/00—Electrically operated smoking devices; Component parts thereof; Manufacture thereof; Maintenance or testing thereof; Charging means specially adapted therefor
- A24F40/40—Constructional details, e.g. connection of cartridges and battery parts
- A24F40/46—Shape or structure of electric heating means
-
- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24F—SMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES
- A24F40/00—Electrically operated smoking devices; Component parts thereof; Manufacture thereof; Maintenance or testing thereof; Charging means specially adapted therefor
- A24F40/50—Control or monitoring
-
- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24F—SMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES
- A24F40/00—Electrically operated smoking devices; Component parts thereof; Manufacture thereof; Maintenance or testing thereof; Charging means specially adapted therefor
- A24F40/50—Control or monitoring
- A24F40/57—Temperature control
Landscapes
- Resistance Heating (AREA)
Abstract
The embodiment of the application relates to a control method of an aerosol-generating device and the aerosol-generating device, wherein the aerosol-generating device comprises a containing cavity for containing at least partial aerosol-generating product, a heating component for directly or indirectly heating the aerosol-generating product, a suction detection component for outputting a suction control signal when a suction event is detected, and a controller; the control method comprises the following steps: acquiring a suction control signal; the output power is regulated and controlled to the heating element according to the pumping control signal so that the temperature of the heating element is delayed to a preset temperature after a pumping event and then restored to the preset temperature after a preset period of time.
Description
Technical Field
The embodiment of the application relates to the technical field of aerosol generation, in particular to a control method of an aerosol generating device and the aerosol generating device.
Background
The aerosol-generating device may generate an aerosol for inhalation by heating air and directing the heated air to and heating the aerosol-generating article.
However, in the prior art, the outlet for the hot air of the aerosol-generating article is often arranged at the bottom of the aerosol-generating article, resulting in uneven heating of the aerosol-generating article, and the bottom area of the aerosol-generating article, which is closer to the hot air outlet, is at a higher temperature than the top area, which is further from the hot air outlet. To ensure that the aerosol-generating article is sufficiently heated, the industry tends to heat the aerosol-generating article by providing hot air at a higher temperature, but tends to cause carbonization or even burning of the bottom region of the aerosol-generating article.
Disclosure of Invention
Embodiments of the present application provide a control method of an aerosol-generating device and an aerosol-generating device, which can prevent local carbonization or combustion of an aerosol-generating product while ensuring that the aerosol-generating product is relatively sufficiently heated.
An embodiment of the present application provides a control method of an aerosol-generating device comprising a receiving cavity for receiving at least a partial aerosol-generating article, a heating assembly for directly or indirectly heating the aerosol-generating article, a puff detection assembly for outputting a puff control signal upon detection of a puff event, and a controller; the control method comprises the following steps:
acquiring the suction control signal;
And adjusting and controlling output power to the heating component according to the pumping control signal so as to enable the temperature of the heating component to be recovered to the preset temperature after a preset time period after the pumping event.
An embodiment of the present application provides an aerosol-generating device comprising:
a receiving cavity for receiving at least part of an aerosol-generating article;
a heating assembly configured to directly or indirectly heat the aerosol-generating article;
a puff detection assembly configured to detect a puff event of the aerosol-generating device and output a puff control signal upon detection of the puff event; and
And a controller connected to the heating assembly and the suction detection assembly, respectively, the controller being configured to perform the control method described above.
According to the control method of the aerosol generating device and the aerosol generating device, the power output to the heating assembly is regulated and controlled, so that after the pumping event is finished, the heating assembly is restored to the preset temperature after being delayed for a preset time period, and therefore, excessive heat cannot be accumulated in a local area of an aerosol generating product in a short time, and local carbonization or combustion of the aerosol generating product can be effectively prevented.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are used in the description of the embodiments will be briefly described below. Like elements or portions are generally identified by like reference numerals throughout the several figures. In the drawings, elements or portions thereof are not necessarily drawn to scale.
Fig. 1 is a schematic view of an aerosol-generating device according to an embodiment of the present application;
Fig. 2 is a schematic diagram showing the connection of a controller, a suction detection assembly and a heating assembly in an aerosol-generating device according to an embodiment of the present application;
Fig. 3 is a partial schematic view of an aerosol-generating device according to an embodiment of the application;
FIG. 4 is a schematic diagram of a heating assembly provided in an embodiment of the present application;
FIG. 5 is a schematic diagram showing a combination of a rod core, a heating body and a temperature sensor according to an embodiment of the present application;
FIG. 6 is an exploded view of a rod core, a heater and a temperature sensor according to an embodiment of the present application;
FIG. 7 is a schematic diagram of a temperature profile of a heating element according to an embodiment of the present application, wherein FIG. 7 (b) is a schematic diagram of a temperature change of the heating element at a greater pumping force of a pumping event than that of FIG. 7 (a), and FIG. 7 (c) is a schematic diagram of a temperature change of the heating element at a longer pumping duration of a pumping event than that of FIG. 7 (a);
FIG. 8 is a schematic diagram of the temperature of a heating assembly when multiple pumping events occur in a short period of time, according to an embodiment of the present application;
Fig. 9 is a schematic diagram of steps of a control method of a sol-generating device according to an embodiment of the application;
Reference numerals in the specific embodiments are as follows:
1. an aerosol-generating article; 11. an aerosol-forming substrate; 12. a suction nozzle;
2. A heating assembly; 21. a porous body; 211. air holes; 212. an open mouth; 22. a heating body; 23. a rod core; 231. perforating; 24. a lead wire;
31. a receiving chamber; 32. an air flow channel;
4. A suction detection assembly; 41. a temperature sensor;
5. A controller;
6. A power supply;
7. a thermal insulation layer; 71. an air insulating layer or a vacuum layer.
Detailed Description
The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
The terms "first," "second," "third," and the like in the present application are used for descriptive purposes only and are not to be construed as indicating or implying any particular order or quantity of features in relation to importance or otherwise indicated. All directional indications (such as up, down, left, right, front, back … …) in the embodiments of the present application are merely used to explain the relative positional relationship or movement between the components in a particular gesture (as shown in the drawings), and if the particular gesture changes, the directional indication changes accordingly. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those listed steps or elements but may include other steps or elements not listed or inherent to such process, method, article, or apparatus.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.
It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or one or more intervening elements may also be present therebetween. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and/or" as used in this specification includes any and all combinations of one or more of the associated listed items.
In addition, the technical features mentioned in the different embodiments of the application described below can be combined with one another as long as they do not conflict with one another.
Referring to fig. 1 and 9, an embodiment of the present application provides an aerosol-generating device and a method of controlling an aerosol-generating device for generating an aerosol without burning an aerosol-generating article 1.
As used herein, the term "aerosol-generating article" refers to an article comprising an aerosol-forming substrate 11, which aerosol-forming substrate 11 releases volatile compounds that can form an aerosol when heated. An aerosol formed by heating an aerosol-forming substrate may contain fewer known hazardous components than an aerosol produced by combustion or pyrolysis degradation of the aerosol-forming substrate. In an embodiment, the aerosol-generating article is removably coupled to the aerosol-generating device. The aerosol-generating article may be disposable or reusable.
The aerosol-forming substrate 11 may be a solid aerosol-forming substrate. The solid aerosol-forming substrate may comprise a tobacco-containing material containing volatile tobacco flavour compounds that are released from the substrate upon heating. The solid aerosol-forming substrate may comprise no tobacco material. The solid aerosol-forming substrate may comprise tobacco-containing material and no tobacco-containing material. When the aerosol-forming substrate 11 is a solid aerosol-forming substrate, the aerosol-generating article may be a cigarette, a tobacco rod, a cigar or the like.
As used herein, the term "aerosol-generating device" is a device that interfaces or interacts with an aerosol-generating article to form an inhalable aerosol. The aerosol-generating device may be an electrically operated device, for example an operable power supply assembly supplies energy to heat an aerosol-forming substrate to generate an aerosol.
The aerosol-generating device may be described as a heated aerosol-generating device, which is an aerosol-generating device comprising a heating assembly 2, or an aerosol-generating device capable of heating the heating assembly 2. The heating assembly 2 is for heating an aerosol-forming substrate 11 of the aerosol-generating article 1 to generate an aerosol. In an example, the aerosol-generating device comprises a receiving cavity 31, the receiving cavity 31 being for receiving at least part of the aerosol-generating article 1, the heating assembly 2 being heatable to the aerosol-generating article 1 after at least part of the aerosol-generating article 1 is received in the receiving cavity 31.
In one example, the heating assembly is incorporated on the aerosol-generating article as an integral part of the aerosol-generating article. In an example, reference may be made to fig. 1, wherein the heating assembly 2 is incorporated in the aerosol-generating device as an integral part of the aerosol-generating device. In one example, part of the heating assembly is incorporated in the aerosol-generating device and the remainder is incorporated in the aerosol-generating article.
When the heating assembly 2 is part of an aerosol-generating device, the heating assembly 2 may comprise an external heating assembly or an internal heating assembly or an air heating assembly, the term "external heating assembly" as used herein refers to a heating assembly that is positioned outside the aerosol-generating article when the aerosol-generating article is combined with the aerosol-generating device. As used herein, the term "internal heating assembly" refers to a heating assembly that is positioned at least partially within an aerosol-generating article when the aerosol-generating article is combined with an aerosol-generating device. As used herein, the term "air heating assembly" refers to a heating assembly for heating air in an airflow path through which the air enters an aerosol-generating article, the air heating assembly heating air flowing through the airflow path to a high temperature air which then enters the aerosol-generating article, exchanging heat with the aerosol-generating article, effecting heating and baking of the aerosol-generating article.
The heating assembly 2 may directly heat or indirectly heat the aerosol-generating article 1 in combination with the aerosol-generating device. As used herein, the term "directly heated" refers to heat exchange directly with the aerosol-generating article as the heating assembly heats the aerosol-generating article. As used herein, the term "indirectly heated" refers to the heating assembly heating the aerosol-generating article without directly exchanging heat with the aerosol-generating article or alternatively, the heating assembly indirectly heats the aerosol-generating article by heating air entering the aerosol-generating article.
The interior of the aerosol-generating device has an air flow channel 32 through which ambient air may enter the receiving cavity and thus the aerosol-generating article 1. In one example, as shown in fig. 3, the proximal end of the receiving chamber 31 is open for insertion of the aerosol-generating article 1 into the receiving chamber 31, and the distal end of the receiving chamber 31 is in communication with the air flow channel 32, such that air enters the receiving chamber from the distal end of the receiving chamber. In one example, as shown in fig. 3, the heating assembly 2 is located in the airflow channel 32 for heating air flowing through the airflow channel 32.
Referring to fig. 1 and 2, the aerosol-generating device is configured to comprise a puff detection assembly 4, the puff detection assembly 4 being configured to detect a puff event of the aerosol-generating device, which a user may form by either inhaling a mouthpiece 12 of the aerosol-generating device to which the aerosol-generating article 1 is exposed, or by inhaling a mouthpiece on the aerosol-generating device, when the aerosol-generating article 1 is combined with the aerosol-generating device. And, the puff detection assembly 4 is capable of outputting a puff control signal upon detection of a puff event.
In one embodiment, the suction detection assembly 4 includes an airflow detector configured to detect a flow rate of the airflow in the airflow channel 32 and output a suction control signal based on the detected flow rate of the airflow. The airflow in the airflow channel 32 has a lower flow rate when no pumping event occurs and a higher flow rate when a pumping event occurs. So that the air flow detector generates and outputs a suction control signal when it detects that the flow rate of the air flow in the air flow channel 32 reaches or exceeds a preset flow rate value.
Wherein the greater the suction force, the greater the flow rate of the air flow in the air flow channel 32 and the more air is admitted into the aerosol-generating article 1 per unit time and the more heat is lost by the heating assembly 2 or the aerosol-generating article 1. In one example, the puff detection assembly 4 includes a memory having stored therein a plurality of range values of airflow flow rates for different puff forces such that the puff detection assembly 4 can determine a puff force of a puff event based on the flow rate of the airflow; for example, a first pumping force and a second pumping force may be included, wherein a minimum value of the airflow rate in the second pumping force is greater than a maximum value of the airflow rate in the first pumping force, and the minimum value of the airflow rate in the first pumping force is a preset flow rate value for detecting the occurrence of a pumping event. In one example, each flow rate of the airflow in airflow channel 32 represents a pumping force.
In an embodiment, the suction detection assembly 4 comprises a temperature sensor 41, the temperature sensor 41 being configured to detect the air flow temperature in the air flow channel 32 and to output a suction control signal in dependence of the detected air flow temperature. After the aerosol-generating device has started the heating assembly 2 to complete the preheating of the aerosol-generating article 1, at least part of the air in the air flow channel 32 has a higher temperature due to heat conduction, heat convection or heat radiation, the air flow temperature in the air flow channel 32 fluctuates less and is thus more stable when no pumping event occurs, and the air flow temperature in the air flow channel 32 is reduced due to cold air entering the air flow channel 32 when a pumping event occurs, so that the air flow temperature in the air flow channel 32 can be detected by the temperature sensor 41, including detecting the magnitude of the decrease in the air flow temperature, or detecting the rate of decrease in the air flow temperature, and generating and outputting a pumping control signal when the magnitude or rate of decrease in the air flow temperature reaches a temperature decrease preset value.
Wherein the greater the suction force, the greater the rate of decrease of the temperature of the air flow in the air flow channel 32 or the magnitude of the temperature decrease per unit time, and the more air is admitted into the aerosol-generating article per unit time, and the more heat is lost by the heating assembly 2 or the aerosol-generating article 1. In one example, the puff detection assembly 4 includes a memory having stored therein a plurality of range values of the rate of airflow temperature decrease or the magnitude of temperature decrease per unit time for different puff forces, such that the puff detection assembly 4 can determine the puff force of a puff event based on the rate of airflow temperature decrease or the magnitude of temperature decrease per unit time; for example, the method may include a first pumping force and a second pumping force, wherein a minimum value of a rate of airflow temperature decrease in the second pumping force is greater than a maximum value of the rate of airflow temperature decrease in the first pumping force, and the minimum value of the rate of airflow temperature decrease in the first pumping force is a preset value of temperature decrease for detecting occurrence of a pumping event; for example, the first pumping force and the second pumping force may be included, wherein a minimum value of an amplitude of decrease in the air flow temperature per unit time in the second pumping force is larger than a maximum value of an amplitude of decrease in the air flow temperature per unit time in the first pumping force, and a minimum value of the amplitude of decrease in the air flow temperature per unit time in the first pumping force is a temperature decrease preset value for detecting occurrence of the pumping event. In one example, each rate of decrease in temperature of the airflow in airflow path 32 or each magnitude of decrease in temperature per unit time represents a pumping force.
In embodiments where the heating assembly 2 comprises an air heating assembly, as may be seen in fig. 1 and 3, the proximal end of the heating assembly 2 is disposed towards the receiving chamber 31, air flows through the heating assembly 2 from the distal end of the heating assembly 2 and from the proximal end of the heating assembly 2 towards the receiving chamber 31, and the temperature sensor 41 is configured to detect the temperature of the air flow in the air flow channel 32 and to output a suction control signal in dependence on the detected air flow temperature. In an example, and referring to fig. 3, the temperature sensor 41 may be configured to detect the temperature of the air flow in the air flow channel 32 adjacent the proximal end of the heating element 2, the air flow in the air flow channel 32 adjacent the proximal end of the heating element 2 being at a temperature closer to the temperature of the air flow in the bottom of the aerosol-generating article 1 than the air flow in the heating element 2 and the air flow not flowing through the heating element 2, i.e. the temperature of the air flow in the air flow channel 32 adjacent the proximal end of the heating element 2 being more indicative of the heated temperature of the bottom of the aerosol-generating article 1, the controller 5 in the aerosol-generating device may adjust and control the output power to the heating element 2 based on this temperature to ensure a suitable heated temperature of the aerosol-generating article 1 and to avoid carbonization and burning of the aerosol-generating article 1, while also being able to determine whether there is a pumping event based on a change in this temperature (e.g. a drop in magnitude or a drop rate). In one example, referring to fig. 1, the temperature sensor 41 may be configured to detect the temperature of the air flow in the air flow channel 32 adjacent the distal end of the heating element 2, where the air flow in the air flow channel 32 adjacent the distal end of the heating element 2 has a higher temperature due to the proximity to the heating element 2, and because it does not completely flow through the heating element 2, such that when a pumping event occurs, the temperature change is more pronounced, and detecting the temperature of the air flow in the air flow channel 32 adjacent the distal end of the heating element 2 can improve the accuracy and sensitivity of the detection of the pumping event.
More specifically, in an example, referring to fig. 4, the heating assembly 2 includes a porous body 21 and a heating body 22 coupled to the porous body 21 for heating the porous body 21, the porous body 21 having a plurality of air holes 211 through which air passes, the heating body 22 being embedded inside the porous body 21 or surrounding a sidewall of the porous body 21. The porous body 21 may include glass fiber, ceramic, graphite, graphene, foam metal, wire bundle, or the like, and the porous body 21 heats up by absorbing heat of the heating body 22 and releases heat to the air flowing therethrough to heat the air flowing therethrough. The temperature sensor 41 is fixed and exposed at the proximal end of the porous body 21.
In the embodiment shown in fig. 4 and 5, the heating assembly 2 further includes a rod core 23, and the heating body 22 is a heating coil or a heating mesh, which surrounds the periphery of the rod core 23 or is sintered integrally with the rod core 23 and is held inside the porous body 21 by the rod core 23, and the proximal end of the rod core 23 supports the temperature sensor 41 upward. The proximal end of the porous body 21 has an open mouth 212, and the temperature sensor 41 is located in the open mouth 212 and exposed through the open mouth 212. In order to be able to more accurately detect the temperature of the air flow in the air flow channel 32 adjacent the proximal end of the heating element 2, there is no contact between the temperature sensor 41 and the wall of the opening 212, so that the air in the air flow channel 32 adjacent the proximal end of the heating element 2 can surround the temperature sensor 41.
Referring to fig. 5 and 6, the core 23 may have one or more through holes 231, and the lead 24 connecting the temperature sensor 41 and the controller 5 may pass through the through holes 231 in the core. The heating body 22 may comprise a resistive material capable of generating joule heat when energized, and at least one wire 25 connecting the heating body 22 with the controller 5 may pass through a corresponding perforation 231 on the wand core 23, more particularly, the distal end of the heating body 22 is electrically connected with the first wire 251, and the proximal end of the heating body 22 passes through the side wall of the wand core 23 or is embedded in the side wall of the wand core 23, such that the proximal end of the heating body 22 is electrically connected with the second wire 252 in one of the perforations 231, the second wire 252 extending down the perforation 231 to pass out of the wand core 23.
The arrangement of the wire 25 connected to the heating body 22 and the lead 24 connected to the temperature sensor 41 by the perforations 231 on the rod core 23 helps to keep the wire 25 and the lead 24 orderly.
It should be noted that the core is optional and not necessary. In an embodiment without a wick, the heating body may be held inside or around the periphery of the porous body, the proximal end of the porous body having a connection portion, and the temperature sensor being connected to the connection portion and being at least partially exposed to the air flow outside the proximal end of the porous body for detecting the temperature of the air flow that is about to enter the aerosol-generating article.
In an embodiment, the heating assembly 2 comprises a heat storage material. The heat storage material refers to a material having a high heat capacity. The material of high heat capacity may be a material having a specific heat capacity of at least 0.5J/g.K, such as at least 0.7J/g.K, such as at least 0.8J/g.K, at 25 ℃ and constant pressure. For example, the heat storage material may include, but is not limited to, fiberglass, glass mat, ceramic, silica, alumina, carbon, and ore, or any combination thereof. In one example, at least part of the porous body 21 is made of a heat storage material. In one example, the thermal conductivity of the thermal storage material is greater than 100W/m.K. In one example, the thermal storage material comprises graphite or graphene having a heat capacity of 0.71J/g.K, while the graphite or graphene has a thermal conductivity of 151W/m.K at 23 degrees Celsius and 50% relative humidity.
Since the heating member 2 includes the heat storage material, the heat storage material can release the stored heat absorbed from the heating body 22 to heat the flowing air within a preset time after the end of the pumping event, so that the temperature of the heating member 2 and the heated temperature of the aerosol-generating article 2 do not drop sharply within a short time or have a large drop amplitude due to the reduction of the power supplied to the heating member 2 within the preset time period, so that the power supplied to the heating member 2 is lower than the preset power for a certain time after the end of the pumping event, the aerosol generation of the aerosol-generating article 1 is not affected, and the pumping taste at the time of the next pumping event is not affected.
In an embodiment, the suction detection assembly 4 comprises an air pressure detector, the aerosol-generating device comprises a detection chamber in fluid communication with the receiving chamber 31, and in the presence of a suction event air in the detection chamber may be sucked into the receiving chamber 31 or into the aerosol-generating article 1 such that the detection chamber forms a negative pressure, and in the absence of a suction event air in the air flow channel 32 or air in the receiving chamber 31 flows into the detection chamber such that the air pressure in the detection chamber is in equilibrium with the ambient atmosphere. The air pressure detector is configured to detect air pressure of the detection chamber and output a suction control signal based on the detected air pressure, i.e., the air pressure detector may generate and output the suction control signal when detecting that the air pressure in the detection chamber is below a preset air pressure value.
Referring to fig. 1, the aerosol-generating device is configured to comprise a power supply assembly for supplying power to the heating assembly 2, which may comprise a power supply 6, which power supply 6 may be any suitable battery. In one embodiment, the battery is a lithium ion battery. Alternatively, the battery may be a nickel metal hydride battery, a nickel cadmium battery, or a lithium-based battery, such as a lithium cobalt, lithium iron phosphate, lithium titanate, or lithium polymer battery. The power supply assembly may comprise a circuit board on which one or more controllers 5 are provided, the controllers 5 being capable of controlling the overall operation of the aerosol-generating device. In detail, the controller 5 controls not only the operation of the battery and heating assembly 2, but also the operation of other elements in the aerosol-generating device. Furthermore, the controller 5 may determine whether the aerosol-generating device is operable by checking the status of the elements of the aerosol-generating device.
Wherein, the controller 5 is connected with the power supply 6 and the heating component 2, and can adjust and control the power output by the power supply 6 to the heating component 2, more specifically, the controller 5 can adjust and control the power of the heating component 2 by adjusting and controlling the current magnitude, the voltage magnitude, the duty ratio of the current pulse or the voltage pulse, the frequency of the current pulse or the voltage pulse, and the like, which are output to the heating component 2. The "power" may be a power accumulation, i.e. electric energy, for a preset period of time, or may be an average power for a preset period of time, so that the heating assembly 2 can maintain a certain temperature under a certain power.
The circuit board has a memory in which a preset temperature profile for directly or indirectly heating the aerosol-generating article 1 by the heating assembly 2 is stored, and the controller 5 adjusts and controls the power output to the heating assembly 2 according to the preset temperature profile so that the heating temperature of the heating assembly 2 or the heated temperature of the aerosol-generating article 1 corresponds to the preset temperature profile.
Based on this, in an example, the above-mentioned temperature sensor 41 configured to detect the temperature of the air flow in the air flow channel adjacent to the proximal end of the heating member 2 is connected to the controller 5, and the temperature sensor 41 sends a feedback signal to the controller 5, and the controller 5 adjusts and controls the output power to the heating member 2 based on the feedback signal, so that the heated temperature of the aerosol-generating article 1 conforms to the preset temperature profile. In an example, the aerosol-generating device further comprises an acquisition component capable of acquiring the temperature of the heating component 2, the acquisition component may comprise a temperature detector for detecting the temperature of the heating component 2 and a wire connecting the temperature detector with the controller 5, the temperature detector may comprise a thermocouple or a thermistor or the like in direct contact with the heating component 2, so that the controller 5 can acquire the temperature of the heating component 2 detected by the temperature detector through the wire, and adjust and control the output power to the heating component 2 based on the temperature, so that the heated temperature of the heating component 2 conforms to a preset temperature curve. In an example, the aerosol generating device further comprises an acquisition component capable of acquiring the temperature of the heating component 2, the heating body 22 in the heating component 2 comprises a thermistor, the acquisition component comprises a voltage acquisition circuit capable of directly or indirectly acquiring the heating voltage of the thermistor and a current acquisition circuit capable of directly or indirectly acquiring the heating current of the thermistor, the aerosol generating device further comprises a calculator for calculating a real-time resistance value of the thermistor based on the heating voltage and the heating current of the thermistor and converting the heating temperature of the thermistor based on the real-time resistance value, and the controller 5 is connected with the calculator to acquire the temperature of the heating body 22 and regulate and control the output power to the heating component 2 based on the temperature so that the heating temperature of the heating component 2 conforms to a preset temperature curve.
After the heating assembly 2 is activated, the controller 5 may adjust and control the power output to the heating assembly 2 such that the heating assembly 2 operates at a preset power such that the heating temperature of the heating assembly 2 or the heated temperature of the aerosol-generating article 1 reaches the temperature of the pre-heating stage and the heating temperature of the pumping stage on a preset temperature curve.
In the puff phase, the puff detection assembly 4 may output an un-puff control signal when a puff event is not detected, the controller 5 obtaining the un-puff control signal and adjusting and controlling the power of the heating assembly 2 based on the un-puff control signal, causing the heating assembly 2 to operate at a third power such that the heating temperature of the heating assembly 2 or the heated temperature of the aerosol-generating article 1 is maintained consistent with a preset temperature for a time corresponding to a preset temperature profile. Wherein the third power may be a constant power or may be a varying power. It should be noted that, in other embodiments, the controller 5 may dynamically adjust the power to the heating assembly 2 based on the target temperature and the actual temperature, and the time required for the actual temperature to rise to the target temperature, so that the heating temperature of the heating assembly 2 or the heated temperature of the aerosol-generating article 1 coincides with the preset temperature for the time corresponding to the preset temperature profile within the required time. For example, the controller 5 may employ a PID temperature control algorithm to power the heating assembly 2.
The preset power (third power) is a power required to maintain the heating temperature of the heating element 2 or the heated temperature of the aerosol-generating article 1 at a temperature corresponding to the preset heating profile. For example: the preset temperature to which the preset heating profile corresponds at time T0 should be T1, but due to the occurrence of the pumping event the heating temperature of the heating assembly 2 or the heated temperature of the aerosol-generating article 1 is actually T2 at time T0, the corresponding preset power being the power required to keep the heating temperature of the heating assembly 2 or the heated temperature of the aerosol-generating article 1 at T1.
Referring to fig. 7, the controller 5 is connected to the pumping detection assembly 4 to receive a pumping control signal outputted from the pumping detection assembly 4, and adjusts and controls the power outputted to the heating assembly 2 based on the pumping control signal such that the temperature of the heating assembly 2 is restored to a corresponding preset temperature T0 after a delay of a preset period T after a pumping event, wherein the preset period T may be 1s-10s. I.e. after a pumping event, the heating assembly 2 is power compensated by a delay under the control of the controller 5, i.e. after a pumping event the actual power of the heating assembly 2 is reduced below a preset power corresponding to a corresponding time period and the power less than the preset power is continued for a time comprised within said preset time period t.
More specifically, the preset time period t includes a first time period t1 and a second time period t2.
In one embodiment, referring to fig. 7, during a first period t1, the controller 5 activates the heating assembly 2 to output a first power, i.e., causes the heating assembly 2 to operate at the first power, and then enters a second period t2, during which time period t2, the controller 5 activates the heating assembly 2 to output a second power, such that the heating assembly 2 operates at the second power, wherein the first power is less than the second power.
In one example, the operating power of the heating assembly 2 is constant power during the first time period t1, i.e. the operating voltage, the operating current of the heating assembly 2 maintains the same pulse amplitude, pulse frequency or pulse duty cycle during the first time period t1. In an example, during the first period t1, the operating power of the heating element 2 is a variable power, that is, at least one of an operating voltage, a pulse amplitude, a pulse frequency, or a pulse duty cycle of the heating element 2 is changed, the first power may be an average power of the operation of the heating element 2 during the first period t1, and the first power may be a power accumulation of the heating element 2 during the first period t1.
Similarly, the operating power of the heating assembly 2 during the second time period t2 may be a constant power or may vary. The second power may be an average power at which the heating assembly 2 operates during the second period t2, and the second power may be an accumulation of power at which the heating assembly 2 operates during the second period t 2.
The first power and the second power are the average power in the respective time periods or the power accumulation in the respective time periods, so that the first power is smaller than the second power means that the average power in the first time period t1 is smaller than the average power in the second time period t2, or that the power accumulation in the first time period t1 is smaller than the power accumulation in the second time period t 2.
Since the first power is smaller than the second power, the maximum value of the heating temperature of the heating assembly 2 or the heated temperature of the aerosol-generating article 1 during the first time period t1 may be smaller than or equal to the minimum value of the heating temperature of the heating assembly 2 or the heated temperature of the aerosol-generating article 1 during the second time period t2.
In one example, the second power is greater than or equal to the third power. The third power may be an average power maintaining a preset temperature for a corresponding time, or may be a power accumulation maintaining a warm-up temperature for a corresponding time; the second power being greater than or equal to the third power means that: the second power and the third power are both average powers, or the second power and the third power are both power-accumulating, i.e. the second power is greater than or equal to the third power of the same attribute.
In one example, the first power is less than the third power. The first power being less than the third power means: the first power and the third power both belong to the average power, or the first power and the third power both belong to the power accumulation, i.e. the first power is smaller than the third power of the same attribute.
Alternatively, during the first period t1, the controller 5 stops outputting power to the heating assembly 2, that is, during the first period t1, the controller 5 controls the operating voltage of the heating assembly 2 to be 0V, or controls the operating current of the heating assembly 2 to be 0A, and then the second period t2 is entered, and during the second period t2, the controller 5 starts outputting the second power to the heating assembly 2, so that the heating assembly operates at the second power.
In one embodiment, the controller 5 adjusts and controls the power output to the heating assembly 2 such that the temperature of the heating assembly 2 continuously decreases during the first time period T1 and then enters the second time period T2, and during the second time period T2, the temperature of the heating assembly 2 starts to increase, and finally increases to the corresponding preset temperature T0.
In one embodiment, referring to fig. 7, the controller 5 may control and regulate the power output to the heating assembly 2 such that the temperature of the heating assembly 2 is maintained constant during a first period T1, and then enters a second period T2, during which the temperature of the heating assembly 2 begins to rise, eventually to a corresponding preset temperature T0.
The pumping detection assembly 4 detects pumping events according to a preset detection period, or the pumping detection assembly 4 continuously detects pumping, when pumping events occur again within a preset time period T after one pumping event, a new pumping control signal is output, the controller 5 acquires the new pumping control signal, and readjusts and controls output power to the heating assembly 2 based on the new pumping control signal, so that the temperature of the heating assembly 2 is restored to the preset temperature T0 again after the new pumping event by delaying the preset time period T.
The preset time period t delayed based on the new pumping event may be the same as the preset time period t delayed based on the previous pumping event. Of course, the preset time period t delayed based on the new pumping event may be shorter than the preset time period t delayed based on the previous pumping event.
Wherein, as shown in fig. 8, after a plurality of pumping events with shorter time intervals, the temperature of the heating assembly 2 is reduced a plurality of times, and after the temperature of the heating assembly 2 or the heated temperature of the aerosol-generating article 1 is reduced a plurality of times, if the volatile matter in the aerosol-generating article 1 remains, the controller 5 controls the power of the heating assembly 2 so that the temperature of the heating assembly 2 or the heated temperature of the aerosol-generating article 1 rises again until rising again to the preset temperature T0.
For example, referring to fig. 8, the pumping event occurs again within a time tx (tx < t) after the end of one pumping event, such that the temperature drops again before the heating temperature of the heating assembly 2 or the heated temperature of the aerosol-generating article 1 begins to rise towards a preset temperature; after three consecutive pumping events have been completed in a short time, the volatiles in the aerosol-generating article 1 remain, and the controller 5 delays the heating temperature of the heating assembly 2 or the heated temperature of the aerosol-generating article 1 to the preset temperature T0 for a preset time period T.
For example, during a time tx (tx < t 1) after the end of a puff event, the puff event occurs again such that the heating temperature of the heating assembly 2 or the heated temperature of the aerosol-generating article 1 drops again, and after a new puff event and when t1 < tx < t2 or tx+.t2, the controller 5 may control the power to the heating assembly 2 to increase to slow the rate or the magnitude of the drop in the heating temperature of the heating assembly 2 or the heated temperature of the aerosol-generating article 1 continuing to drop after the new puff event. Thus, in a number of successive pumping events within a short time, the heating temperature of the heating assembly 2 or the heated temperature of the aerosol-generating article 1 may be reduced a number of times in succession, but the temperature drop amplitude or the temperature drop rate may be successively reduced.
In an embodiment, the controller 5 may also adjust and control the output of the fourth power to the heating assembly 2 in accordance with the puff control signal such that the temperature of the heating assembly 2 or the heated temperature of the aerosol-generating article 1 is continuously reduced during the puff event, i.e. the temperature of the heating assembly 2 or the heated temperature of the aerosol-generating article 1 is continuously reduced at or before the puff event has occurred.
The fourth power may be the average power at which the heating assembly 2 operates for the duration of one pumping event and the fourth power may be the power accumulation of the heating assembly 2 for the duration of one pumping event. The fourth power may be less than or equal to the third power. The fourth power may be less than or equal to the first power. Similarly, the fourth power may be the average power over the duration of a puff or may be the power accumulation over the duration of a puff; the fourth power may be less than or equal to the third power means: the fourth power and the third power are both average powers, or the fourth power and the third power are both power-accumulating, i.e. the fourth power is less than or equal to the third power of the same attribute.
Alternatively, the controller 5 may also stop outputting power to the heating assembly 2 according to the pumping control signal, i.e., the controller 5 controls the operating voltage of the heating assembly 2 to 0V or the operating current of the heating assembly 2 to 0A when the pumping event occurs or before the pumping event is not completed.
The length of the preset time period t may be constant, that is, the preset time period t may be the same each time after the pumping event regardless of the number of pumping events.
The length of the preset time period t may be changed according to the suction force, and when the suction force of one suction event is larger, the corresponding preset time period t may be shortened, for example, the first time period t1 in the preset time period t may be shortened.
The longer the duration of a puff event in one puff event, the more air that enters the aerosol-generating article during the duration of the puff event and the more heat that is lost by the heating assembly 2 or the aerosol-generating article 1. The length of the preset time period t may be changed according to the duration of the pumping event in one pumping event, and when the duration of one pumping event is longer, the corresponding preset time period t may be shortened, for example, the first time period t1 in the preset time period t may be shortened.
Referring to fig. 3, in an embodiment in which the heating assembly 2 is an air heating assembly, the aerosol-generating device further comprises a thermal insulation layer 7, the inner surface of the thermal insulation layer 7 defining the boundary of the receiving cavity 31, the thermal insulation layer 7 comprising a tubular body and an air thermal insulation or vacuum layer 71 located in the wall of the tubular body. The prevention of heat loss radially outwards of the aerosol-generating article 1 by the insulating layer 7 facilitates the upward diffusion of heat from the bottom of the aerosol-generating article 1, thereby allowing for a sufficient use of such heat while reducing the heat build-up from the bottom (upstream) of the aerosol-generating article, allowing for heating of the aerosol-forming substrate 11 in the upstream and downstream regions of the aerosol-generating article 1, while also facilitating a reduction in the energy consumption of the heating assembly 2.
According to the control method of the aerosol generating device and the aerosol generating device, the power output to the heating assembly is regulated and controlled, so that after the pumping event is finished, the heating assembly is restored to the preset temperature after being delayed for a preset time period, and therefore, excessive heat cannot be accumulated in a local area of an aerosol generating product in a short time, and local carbonization or combustion of the aerosol generating product can be effectively prevented.
The foregoing description is only illustrative of the present application and is not intended to limit the scope of the application, and all equivalent structures or equivalent processes or direct or indirect application in other related technical fields are included in the scope of the present application.
Claims (19)
1. A method of controlling an aerosol-generating device, the aerosol-generating device comprising a receiving cavity for receiving at least a partial aerosol-generating article, a heating assembly for directly or indirectly heating the aerosol-generating article, a puff detection assembly for outputting a puff control signal upon detection of a puff event, and a controller; the control method comprises the following steps:
acquiring the suction control signal;
And adjusting and controlling output power to the heating component according to the pumping control signal so as to enable the temperature of the heating component to be recovered to the preset temperature after a preset time period after the pumping event.
2. The control method according to claim 1, characterized in that the preset time period is 1s-10s.
3. The control method according to claim 1, characterized by further comprising:
And in the preset time period, starting and outputting first power to the heating assembly, and then starting and outputting second power to the heating assembly, wherein the first power is smaller than the second power.
4. A control method according to claim 3, wherein the temperature of the heating element is continuously decreased and then increased to the preset temperature during the preset time period; or alternatively
The temperature of the heating component is maintained constant and then rises to the preset temperature within the preset time period.
5. A control method according to claim 3, wherein the suction detection assembly outputs a non-suction control signal if a suction event is not detected, the control method further comprising:
Acquiring an un-pumped control signal;
Adjusting and controlling output of a third power to the heating assembly according to the non-pumping control signal so as to maintain the heating assembly at the preset temperature;
Wherein the first power is less than the third power.
6. The control method of claim 1, wherein the second power is started to be output to the heating element after a period of time during which the output power to the heating element is stopped within the preset period of time.
7. The control method of claim 6, wherein the temperature of the heating assembly is continuously decreased and then increased to the preset temperature for the preset time period.
8. The control method according to claim 1, characterized by further comprising:
Acquiring a new suction control signal within the preset time period;
The output power is readjusted and controlled to the heating element in response to a new pumping control signal such that the temperature of the heating element is retarded to a preset temperature for a preset period of time after a new pumping event.
9. The control method of claim 8, wherein the temperature of the heating assembly is reduced a plurality of times and then increased to the preset temperature.
10. A control method according to claim 1, wherein the aerosol-generating device further comprises an acquisition component capable of acquiring the temperature of the heating component group, the control method further comprising:
Acquiring the temperature of the heating assembly;
and adjusting and controlling output power to the heating component according to the temperature so as to maintain the temperature of the heating component at the preset temperature.
11. The control method according to claim 1, characterized in that the control method further comprises:
And adjusting and controlling output of a fourth power to the heating assembly according to the pumping control signal so that the temperature of the heating assembly is continuously reduced during the duration of the pumping event.
12. An aerosol-generating device, comprising:
a receiving cavity for receiving at least part of an aerosol-generating article;
a heating assembly configured to directly or indirectly heat the aerosol-generating article;
a puff detection assembly configured to detect a puff event of the aerosol-generating device and output a puff control signal upon detection of the puff event; and
A controller connected to the heating assembly and the suction detection assembly, respectively, the controller configured to perform the control method of any one of claims 1-11.
13. An aerosol-generating device according to claim 12, comprising an airflow channel providing air into the receiving chamber, the heating assembly being configured to heat air flowing through the airflow channel.
14. An aerosol-generating device according to claim 13, wherein the proximal end of the heating assembly is arranged towards the receiving cavity, the puff detection assembly comprising a temperature sensor configured to detect an airflow temperature of the airflow channel and to output the puff control signal in dependence on the airflow temperature.
15. An aerosol-generating device according to claim 14, wherein the heating assembly comprises a porous body and a heating body coupled to the porous body for heating the porous body, the temperature sensor being fixed and exposed at a distal end of the porous body.
16. An aerosol-generating device according to claim 12, wherein the heating assembly comprises a heat storage material having a heat capacity of greater than or equal to 0.7J/g.K.
17. An aerosol-generating device according to claim 12, wherein the puff detection assembly comprises a temperature sensor, the aerosol-generating device comprising an airflow channel providing air into the receiving cavity, the temperature sensor being configured to detect an airflow temperature in the airflow channel and to output the puff control signal in dependence on the airflow temperature.
18. An aerosol-generating device according to claim 12, wherein the puff detection assembly comprises an airflow detector comprising an airflow channel providing air into the receiving chamber, the airflow detector being configured to detect a flow rate of the airflow in the airflow channel and to output the puff control signal in dependence on the flow rate.
19. An aerosol-generating device according to claim 12, wherein the puff-detection assembly comprises an air pressure detector, the aerosol-generating device comprising a detection chamber in fluid communication with the receiving chamber, the air pressure detector being configured to detect air pressure of the detection chamber and to output the puff-control signal in dependence on the air pressure.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310325156.6A CN118680337A (en) | 2023-03-23 | 2023-03-23 | Control method for aerosol-generating device and aerosol-generating device |
| PCT/CN2024/082721 WO2024193584A1 (en) | 2023-03-23 | 2024-03-20 | Control method for aerosol generating device, and aerosol generating device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310325156.6A CN118680337A (en) | 2023-03-23 | 2023-03-23 | Control method for aerosol-generating device and aerosol-generating device |
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| CN108851233B (en) * | 2018-04-04 | 2020-02-28 | 赫斯提亚深圳生物科技有限公司 | Aerosol generating device and control method thereof |
| CN108991602B (en) * | 2018-04-13 | 2020-05-05 | 赫斯提亚深圳生物科技有限公司 | Aerosol generating device and heating control method thereof |
| CN111053299A (en) * | 2019-12-31 | 2020-04-24 | 深圳市辰昱科技有限公司 | Method and device for controlling heating temperature of electronic smoking set and electronic smoking set |
| CN114431541A (en) * | 2020-11-04 | 2022-05-06 | 深圳市合元科技有限公司 | Aerosol generating device and control method thereof |
| EP4316286A1 (en) * | 2021-03-23 | 2024-02-07 | Japan Tobacco Inc. | Inhalation device, control method, and program |
| WO2022201304A1 (en) * | 2021-03-23 | 2022-09-29 | 日本たばこ産業株式会社 | Inhalation device, control method, and program |
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