WO2024017370A1 - Aerosol generation device and control method therefor, and method for generating aerosols - Google Patents

Abstract

An aerosol generation device (100) and a control method therefor, and a method for generating aerosols. The control method comprises: within a first partial period of a control period of a heater (11), controlling a power source to only provide heating power to a first heating region, such that the temperature of the first heating region rises from an initial temperature to a first preset target temperature; and within the remaining partial periods of the control period of the heater (11), controlling the power source to provide the heating power to the first heating region and a second heating region at the same time, wherein the duration of the first partial period is between 10s-30s. Within a first partial period of a control period of a heater (11), a first heating region is controlled to start heating and a second heating region is controlled to not start heating; and within the remaining partial periods, the first heating region and the second heating region are controlled to start heating at the same time, such that the preheating time of an aerosol-forming matrix is shortened, the problem of a user feeling a burning sensation in his/her mouth when vaping aerosols is prevented, and the vaping experience and usage experience of the user are improved.

Description

Aerosol generating device and control method thereof, and method of generating aerosol

Cross-references to related applications

This application requests the priority of the Chinese patent application submitted to the China Patent Office on July 21, 2022, with the application number 202210872754.0, and the invention name is "Aerosol generation device and its control method, and method for generating aerosol", and its entire content incorporated herein by reference.

Technical field

The present application relates to the field of electronic atomization technology, and in particular to an aerosol generating device and its control method, and a method for generating aerosol.

Background technique

An existing aerosol generating device mainly coats the outer surface of a substrate with a far-infrared coating and a conductive coating. After being energized, the far-infrared coating emits far-infrared rays that penetrate the substrate and form a matrix for the aerosol in the substrate. Heating; because far-infrared rays have strong penetrability, they can penetrate the periphery of the aerosol-forming matrix and enter the interior, making the aerosol-forming matrix more uniformly heated.

The problem with this aerosol generating device is that the preheating time of the aerosol-forming matrix is long, and the user feels his mouth is burning when inhaling the aerosol, which affects the user's experience.

Contents of the invention

This application provides an aerosol generating device, a control method thereof, and a method for generating aerosol, aiming to solve the problems of long preheating time and suction burning of the mouth existing in the existing aerosol generating device.

In one aspect, the present application provides an aerosol generating device configured to heat an aerosol-forming substrate to generate an aerosol; the aerosol-generating substrate includes a first part of the aerosol-generating substrate and a second part of the aerosol-generating substrate; the aerosol Generating devices include:

power supply;

a heater comprising a first heating zone for heating the first portion of the aerosol-forming substrate and a second heating zone for heating the second portion of the aerosol-forming substrate;

Controller, configured as:

During the first part of the control period of the heater, the power supply is controlled to only provide heating power to the first heating zone so that the temperature of the first heating zone rises from an initial temperature to a first preset target temperature. ;

controlling the power supply to provide heating power to the first heating zone and the second heating zone simultaneously during the remainder of the control period of the heater;

Wherein, the duration of the first part period ranges from 10s to 30s.

Another aspect of the present application provides a method of controlling an aerosol generating device configured to heat an aerosol-forming substrate to generate an aerosol; the aerosol generating device includes a power source for heating the first part a first heating zone of the aerosol-forming substrate and a second heating zone for heating the second portion of the aerosol-forming substrate; the aerosol-generating substrate includes a first portion of the aerosol-generating substrate and a second portion of the aerosol-generating substrate;

The control methods include:

During the first part of the control period of the heater, the power supply is controlled to only provide heating power to the first heating zone so that the temperature of the first heating zone rises from an initial temperature to a first preset target temperature. ;

controlling the power supply to provide heating power to the first heating zone and the second heating zone simultaneously during the remainder of the control period of the heater;

Wherein, the duration of the first part period ranges from 10s to 30s.

Another aspect of the present application also provides a method of generating aerosol from an aerosol generating matrix using an aerosol generating device,

The aerosol-generating substrate includes a first part of the aerosol-generating substrate and a second part of the aerosol-generating substrate; the aerosol-generating device includes a first heating area for heating the first part of the aerosol-generating substrate; said second portion of the aerosol forming second heated region of the matrix;

The methods include:

During the first part of the control period of the heater, the first heating zone starts heating and rises from an initial temperature to a first preset target temperature; and the second heating zone does not start heating;

During the remainder of the control period of the heater, the first heating zone and the second heating zone initiate heating simultaneously;

Wherein, the duration of the first part period ranges from 10s to 30s.

The aerosol generation device, its control method, and the aerosol generation method provided by this application are by controlling only the first heating zone to start heating and the second heating zone not to start heating during the first part of the heater's control period; During part of the period, the first heating zone and the second heating zone are controlled to start at the same time. Dynamic heating; reduces the preheating time of the aerosol-forming matrix, avoids the problem of users feeling hot on their mouth when inhaling the aerosol, and improves the user's inhalation and use experience.

Description of drawings

One or more embodiments are exemplified by the pictures in the corresponding drawings. These illustrative illustrations do not constitute limitations to the embodiments. Elements with the same reference numerals in the drawings are represented as similar elements. Unless otherwise stated, the figures in the drawings are not intended to be limited to scale.

Figure 1 is a schematic diagram of an aerosol generation device provided by an embodiment of the present application;

Figure 2 is an exploded schematic diagram of the aerosol generation device provided by the embodiment of the present application;

Figure 3 is a schematic diagram of a heater provided by an embodiment of the present application;

Figure 4 is a schematic diagram of the infrared electrothermal coating of the heater provided by the embodiment of the present application after unfolding;

Figure 5 is a schematic diagram of the connection electrode provided by the embodiment of the present application;

Figure 6 is a schematic diagram of another heater provided by the embodiment of the present application;

Figure 7 is a schematic diagram of another heater provided by the embodiment of the present application after the infrared electrothermal coating is unfolded;

Figure 8 is a schematic diagram of the control curve of the heater provided by the embodiment of the present application;

Figure 9 is a schematic diagram of the actual temperature curve of the heater provided by the embodiment of the present application.

Detailed ways

In order to facilitate understanding of the present application, the present application will be described in more detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that when an element is referred to as being "secured" to another element, it can be directly on the other element, or one or more intervening elements may be present therebetween. When an element is referred to as being "connected" to another element, it can be directly connected to the other element, or there may be one or more intervening elements present therebetween. The terms "upper", "lower", "left", "right", "inner", "outer" and similar expressions used in this specification are for illustrative purposes only.

Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by a person skilled in the technical field belonging to this application. The terms used in the description of this application are only for the purpose of describing specific embodiments and are not used to limit this application. As used in this specification, the term "and/or" includes any and all of one or more of the associated listed items. combination.

Figures 1-2 illustrate an aerosol generation device 100 provided by an embodiment of the present application, including a housing assembly 6 and a heater 11. The heater 11 is provided in the housing assembly 6 . The heater 11 can radiate infrared rays to heat the aerosol-forming substrate to generate an inhalable aerosol.

The shell assembly 6 includes a shell 61, a fixed shell 62, a base and a bottom cover 64. The fixed shell 62 and the base are both fixed in the shell 61. The base is used to fix the heater 11, and the base is arranged in the fixed shell 62. , the bottom cover 64 is provided at the distal end 9 of the housing 61 and covers the housing 61 . The fixed shell 62 is provided with an insertion opening through which the aerosol-forming substrate is removably received or inserted into the heater 11 .

The base includes a base 15 that is sleeved on the upper end of the heater 11 and a base 13 that is sleeved on the lower end of the heater 11. The base 15 and the base 13 are both located in the fixed shell 62, and the bottom cover 64 has a protruding inlet. The air pipe 641 and one end of the base 13 away from the base 15 are connected to the air inlet pipe 641. The base 15, the heater 11, the base 13 and the air inlet pipe 641 are coaxially arranged, and the heater 11 is connected to the base 15 and the air inlet pipe 641. The space is sealed by a seal, and the base 13 and the air inlet pipe 641 are also sealed. The air inlet pipe 641 is connected to the outside air so that the user can smoothly take in air when suctioning.

The aerosol generating device 100 also includes a circuit board 3 and a battery core 7 . The fixed shell 62 includes a front shell 621 and a back shell 622. The front shell 621 and the back shell 622 are fixedly connected. The circuit board 3 and the battery core 7 are both arranged in the fixed shell 62. The battery core 7 is electrically connected to the circuit board 3. The buttons 4 are protruding. It is provided on the housing 61, and by pressing the button 4, the heater 11 can be powered on or off. The circuit board 3 is also connected to a charging interface 31, which is exposed on the bottom cover 64. The user can charge or upgrade the aerosol generating device 100 through the charging interface 31 to ensure the continuous use of the aerosol generating device 100.

The aerosol generating device 100 also includes a heat-insulating tube 17. The heat-insulating tube 17 is arranged in the fixed shell 62. The heat-insulating tube 17 is arranged on the periphery of the heater 11. The heat-insulating tube 17 can prevent a large amount of heat from being transferred to the outer shell 61. Causes users to feel hot. Thermal insulation pipes include thermal insulation materials, which can be thermal insulation glue, aerogel, airgel felt, asbestos, aluminum silicate, calcium silicate, diatomaceous earth, zirconia, etc. The insulated pipe can also be a vacuum insulated pipe. An infrared reflective coating may also be formed inside the heat insulating tube 17 to reflect the infrared rays radiated by the heater 11 toward the aerosol forming substrate to improve heating efficiency.

The aerosol generation device 100 also includes a temperature sensor 2, such as an NTC temperature sensor, for detecting the real-time temperature of the heater 11 and transmitting the detected real-time temperature to the circuit board 3, which regulates the flow through the heater according to the real-time temperature. 11 the size of the current.

Figures 3-4 are a heater provided by the embodiment of the present application. The heater 11 includes:

The base 110 can be made of high temperature resistant and transparent materials such as quartz glass, ceramics or mica, or can be made of other materials with higher infrared transmittance, such as: resistant materials with an infrared transmittance of more than 95%. High-temperature materials are not specifically limited here.

The base 110 is generally in the shape of a tube, preferably in the shape of a circular tube. The interior hollow portion of the base body 110 defines or forms a chamber for receiving the aerosol-forming matrix. The inner diameter of the base 110 is between 7mm and 14mm, or between 7mm and 12mm, or between 7mm and 10mm.

An aerosol-forming matrix is one that releases volatile compounds that can form aerosols. This volatile compound can be released by heating the aerosol-forming matrix. The aerosol-forming matrix may be solid or liquid or include both solid and liquid components. The aerosol-forming substrate can be adsorbed, coated, impregnated or otherwise loaded onto a carrier or support. The aerosol-forming substrate may conveniently be part of an aerosol-generating article.

The aerosol-forming base may include nicotine. The aerosol-forming substrate may comprise tobacco, for example, may comprise tobacco-containing material containing volatile tobacco flavor compounds that are released from the aerosol-forming substrate when heated. The aerosol-forming matrix may comprise at least one aerosol-forming agent, which may be any suitable known compound or mixture of compounds which, in use, facilitates densification and stabilization of the aerosol. formation and are substantially resistant to thermal degradation at the operating temperatures of the aerosol generating system. Suitable aerosol-forming agents are well known in the art and include, but are not limited to: polyols such as triethylene glycol, 1,3-butanediol and glycerol; esters of polyols such as glycerol mono-, di- or triacetate ; and fatty acid esters of mono-, di- or polycarboxylic acids, such as dimethyl dodecanedioate and dimethyltetradecanedioate.

The infrared electrothermal coating 111 is formed on the surface of the base 110 . The infrared electrothermal coating 111 can be formed on the outer surface of the base 110 or on the inner surface of the base 110 .

The infrared electrothermal coating 111 receives electric power to generate heat, and then radiates infrared rays of a certain wavelength, such as far-infrared rays of 8 μm to 15 μm. When the wavelength of infrared rays matches the absorption wavelength of the aerosol-forming matrix, the energy of the infrared rays is easily absorbed by the aerosol-forming matrix. In this example, the wavelength of the infrared ray is not limited, and can be infrared ray of 0.75 μm to 1000 μm, preferably far infrared ray of 1.5 μm to 400 μm.

In this example, the infrared electrothermal coating 111 is formed on the outer surface of the substrate 110. The infrared electrothermal coating 111 includes two infrared electrothermal coatings arranged at intervals. The infrared electrothermal coating 111a and the infrared electrothermal coating 111b in the figure represent Show. Among them, the infrared electric heating coating 111a is closer to the gas than the infrared electric heating coating 111b. The mouth end 8 of the sol generating device 100.

The infrared electrothermal coating 111a is spaced apart from the upper end of the substrate 110, and the spacing distance is between 0.2 mm and 1 mm, which is convenient for manufacturing and production. The distance between the infrared electrothermal coating 111a and the infrared electrothermal coating 111b is between 0.2 mm and 1 mm. The infrared electrothermal coating 111b and the lower end of the base 110 are also spaced apart, with a distance between 1 mm and 4 mm, which facilitates the arrangement of conductive electrodes and prevents the temperature of the lower end of the base 110 from being too high. It should be noted that from the flow direction of the aerosol, the upper end of the base body 110 is located downstream of the lower end of the base body 110 . The axial extension lengths of the infrared electrothermal coating 111a and the infrared electrothermal coating 111b may be the same or different.

The conductive element includes conductive electrodes 112a, 112b, 112c, connecting electrodes 112d and 112e that are spaced apart from each other on the surface of the base 110.

The conductive electrode 112a includes a coupling portion 112a1 extending along the circumferential direction of the base 110 and a conductive portion 112a2 extending axially from the coupling portion 112a1 toward the upper end of the base 110. The coupling portion 112a1 is arc-shaped. The coupling portion 112a1 is spaced apart from the infrared electrothermal coating 111b. The coupling portion 112a1 is disposed between the infrared electrothermal coating 111b and the lower end of the base 110; wires can be welded on the coupling portion 112a1 to It is electrically connected to a power source external to the heater 11, such as the battery core 7 or the converted voltage of the battery core 7, and may also be electrically connected to the power source through other electrical connectors. The conductive part 112a2 is in a strip shape, and the axial extension length is greater than the axial extension length of the infrared electrothermal coating 111b. The upper end of the conductive part 112a2 is flush with the upper end of the infrared electrothermal coating 111b; the conductive part 112a2 is maintained with the infrared electrothermal coating 111b. contact to form an electrical connection.

The conductive electrode 112b is in a strip shape, and its axial extension length is the same as the axial extension length of the infrared electrothermal coating 111a. The conductive electrode 112b remains in contact with the infrared electrothermal coating 111a to form an electrical connection.

The structure of the conductive electrode 112c is similar to that of the conductive electrode 112a. The coupling portion 112c1 of the conductive electrode 112c is disposed between the infrared electrothermal coating 111b and the lower end of the base 110. The conductive portion 112c2 is in a strip shape, but its axial extension length is longer than the axis of the infrared electrothermal coating 111a and the infrared electrothermal coating 111b. The upper end of the conductive part 112c2 is flush with the upper end of the infrared electrothermal coating 111a. The conductive part 112c2 maintains contact with both the infrared electrothermal coating 111a and the infrared electrothermal coating 111b to form an electrical connection.

Both the connection electrode 112d and the connection electrode e have a strip shape and are arranged in the infrared electrothermal coating 111b. The axial extension lengths of the connection electrodes 112d and the connection electrode e are the same as the axial extension lengths of the infrared electrothermal coating 111b.

The connection electrode 112d is provided between the conductive electrode 112a and the conductive electrode 112c. Connection electrode 112d The infrared electrothermal coating between the conductive electrode 112a and the conductive electrode 112c is divided into two sub-infrared electrothermal coatings connected in series between the conductive electrode 112a and the conductive electrode 112c (shown as B1 and B2 in Figure 4), The sub-infrared electrothermal coating B1 and the sub-infrared electrothermal coating B2 are distributed along the circumferential direction of the substrate 110; the equivalent resistance of the sub-infrared electrothermal coating B1 and the equivalent resistance of the sub-infrared electrothermal coating B2 may be the same or different. .

The connection electrode 112e is also provided between the conductive electrode 112a and the conductive electrode 112c. The connecting electrode 112e separates the infrared electrothermal coating between the conductive electrode 112a and the conductive electrode 112c into two sub-infrared electrothermal coatings connected in series between the conductive electrode 112a and the conductive electrode 112c (B3 and B4 in Figure 4 shown), the sub-infrared electrothermal coating B3 and the sub-infrared electrothermal coating B4 are distributed along the circumferential direction of the substrate 110; the equivalent resistance of the sub-infrared electrothermal coating B3 and the equivalent resistance of the sub-infrared electrothermal coating B4 can be the same, It can also be different.

By providing the connecting electrode 112d and the connecting electrode 112e, the overall resistance of the infrared electrothermal coating 111b can be reduced.

It should be noted that, as needed, multiple connection electrodes 112d and/or connection electrodes 112e can be provided between the conductive electrode 112a and the conductive electrode 112c to separate the infrared electrothermal coating into a plurality of electrodes connected in series between the conductive electrode 112a and the conductive electrode 112c. The sub-infrared electrothermal coating between 112c; for example: 2 connection electrodes 112d are separated into 3 sub-infrared electrothermal coatings connected in series between the conductive electrode 112a and the conductive electrode 112c, the equivalent resistance of the 3 sub-infrared electrothermal coatings They can be the same or different, or the equivalent resistances of two sub-infrared electrothermal coatings are the same.

It should also be noted that multiple connection electrodes 112d and/or connection electrodes 112e can be provided between the conductive electrode 112b and the conductive electrode 112c as needed to reduce the overall resistance of the infrared electrothermal coating 111a.

The conductive electrode 112a, the conductive electrode 112b, the conductive electrode 112c, the connecting electrode 112d and the connecting electrode 112e preferably adopt a continuous conductive coating. The conductive coating can be a metal coating, and the metal coating can include silver, gold, palladium, platinum, and copper. , nickel, molybdenum, tungsten, niobium or the above metal alloy materials. The width of the connection electrode 112d and the connection electrode 112e is between 0.5mm and 3mm; or between 0.5mm and 2.5mm; in specific examples, it can be 1mm or 2mm.

In other examples, the connection electrode 112d and the connection electrode 112e may also adopt discontinuous conductive coating, such as the conductive coating with mesh as shown in FIG. 5 .

It should be noted that during the preparation process of the heater 11, the connection electrode 112d and/or the connection electrode 112d may be The connecting electrode 112e is disposed between the base 110 and the infrared electrothermal coating 111b along the direction perpendicular to the surface of the base 110; the infrared electrothermal coating 111b can also be disposed between the base 110 and the connecting electrode. The conductive portion 112a2 of the conductive electrode 112a and the conductive portion 112c2 of the conductive electrode 112c may also be provided in this way.

Through the arrangement of conductive elements in Figure 3, the infrared electrothermal coating 111a and the infrared electrothermal coating 111b can be independently controlled. Specifically, the power supply can be controlled to provide heating power to the infrared electrothermal coating 111a and/or the infrared electrothermal coating 111b; for example, the power supply is first controlled to provide heating power to the infrared electrothermal coating 111a to heat the upper half of the aerosol-generating product ( The portion corresponding to the area of the infrared electrothermal coating 111a); and then the power supply is controlled to provide heating power to the infrared electrothermal coating 111b to heat the lower half of the aerosol-generating product (the portion corresponding to the area of the infrared electrothermal coating 111b). Vice versa is also possible.

Alternatively, the power supply is first controlled to provide heating power to the infrared electrothermal coating 111a to heat the upper half of the aerosol-generating product; and then the power supply is controlled to provide heating power to the infrared electrothermal coating 111a and the infrared electrothermal coating 111b at the same time to heat the entire The aerosol-generating article is heated.

Alternatively, the power supply is first controlled to provide heating power to the infrared electrothermal coating 111b to heat the lower half of the aerosol-generating product; and then the power supply is controlled to provide heating power to the infrared electrothermal coating 111a and the infrared electrothermal coating 111b at the same time to heat the entire The aerosol-generating article is heated.

When controlling the heating of the infrared electrothermal coating 111a, for example, the conductive electrode 112b is electrically connected to the positive electrode of the power supply, and the coupling portion 112c1 is electrically connected to the negative electrode of the power supply; in this way, current flows from the conductive electrode 112b and passes along the circumferential direction of the base body 110 After sub-infrared electrothermal coating A1 or sub-infrared electrothermal coating A2, it flows out from the conductive part 112c2.

When controlling the heating of the infrared electrothermal coating 111b, for example, the coupling part 112a1 is electrically connected to the positive electrode of the battery core 7, and the coupling part 112c1 is electrically connected to the negative electrode of the battery core 7. Current flows from the conductive part 112a2 and passes through the sub-infrared electrothermal coating in sequence. After the layer B1 and the sub-infrared electrothermal coating B2, it simultaneously passes through the sub-infrared electrothermal coating B4 and the sub-infrared electrothermal coating B3, and then flows out from the conductive part 112c2. The connection electrode 112d and the connection electrode 112e are not connected to the power supply or circuit outside the heater 11, that is, the connection electrode 112d and the connection electrode 112e are suspended, and the current cannot flow directly from the connection electrode 112c and then flow out from the conductive part 112b2 or the conductive part 112a2. . The existence of the connecting electrode 112d and the connecting electrode 112e can reduce the overall resistance of the infrared electrothermal coating 111b.

Please refer to FIG. 3 again. The infrared electrothermal coating 111a area is provided with a mark 113. The mark 113 is used for positioning when assembling the temperature sensor 2. The temperature sensor 2 detects the real-time temperature of the infrared electrothermal coating 111a area, and transmits the detected real-time temperature to the circuit board 3. The circuit board 3 can detect the real-time temperature according to the real-time temperature. Control the temperature of the infrared electrothermal coating 111a and/or the infrared electrothermal coating 111b (described below).

It should be noted that there are many modified implementations of the heater 11 shown in Figures 3 to 5. For example, it is also feasible to replace the conductive electrode 112c with two electrodes similar to the conductive electrode 112a and the conductive electrode 112b. ; Alternatively, the conductive electrodes 112a, 112b and 112c all adopt a ring-shaped electrode structure to separate the infrared electrothermal coating 111 into two upper and lower infrared electrothermal coatings, and the lower infrared electrothermal coating can be provided with one or more annular electrodes. It is also feasible to use a spiral electrode structure for the conductive electrode 112a, a conductive electrode 112b and a conductive electrode 112c, and the connection electrode also adopts a spiral structure.

Figures 6-7 are another heater provided by the embodiment of the present application.

What is different from the example of Figures 3 and 4 is that the axial extension length of the conductive portion 112a2 of the conductive electrode 112a is greater than the sum of the axial extension lengths of the infrared electrothermal coating 111a and the infrared electrothermal coating 111b. The upper end of the conductive portion 112c2 It is flush with the upper end of the infrared electrothermal coating 111a. The conductive electrode 112b and the conductive electrode 112d are both disposed between the conductive portion 112a2 of the conductive electrode 112a and the conductive portion 112c2 of the conductive electrode 112c. The conductive electrode 112b and the conductive electrode 112d are both disposed in the infrared electrothermal coating area 111a.

Different from the examples in Figures 3 and 4, the infrared electrothermal coating 111a can be independently controlled, but the infrared electrothermal coating 111b cannot be independently controlled.

When controlling the heater 11 to heat, firstly, the power supply is controlled to provide heating power to the infrared electrothermal coating 111a through the conductive electrode 112b and the conductive electrode 112d; then, the power supply is controlled to provide heating power to the infrared electrothermal coating 111a and 112c through the conductive electrode 112a and the conductive electrode 112c. The infrared electric heating coating 111b also provides heating power.

When the conductive electrode 112b and the conductive electrode 112d are energized, the conductive portion (the conductive portion 112a2 of the conductive electrode 112a and the conductive portion 112c2 of the conductive electrode 112c) located between the conductive electrode 112b and the conductive electrode 112d is not energized. This conductive portion corresponds to that shown in FIG. 3-The connecting electrode in the example of Figure 4, thereby reducing the overall resistance of the infrared electrothermal coating 111a, causing the infrared electrothermal coating 111a to heat up quickly, which can quickly heat the upper part of the aerosol-generating product to achieve rapid aerosol generation. Purpose.

When the conductive electrode 112a and the conductive electrode 112c are energized, the conductive electrode 112b and the conductive electrode 112d located between the conductive electrode 112a and the conductive electrode 112c are not energized, which are also equivalent to the connecting electrodes in the examples of Figures 3 and 4, thereby reducing infrared electric heating. The overall resistance of coating 111a. At this time, because the infrared electrothermal coating 111a and the infrared electrothermal coating 111b are heated at the same time or the infrared electrothermal coating 111 is heated as a whole, the presence of the conductive electrodes 112b and 112d will reduce the overall strength of the infrared electrothermal coating 111a. The resistance increases the temperature of the infrared electrothermal coating 111a area and changes the temperature field of the entire infrared electrothermal coating 111 area.

Similar to the examples in Figures 3 and 4, the real-time temperature of the infrared electrothermal coating 111a area can be detected by the temperature sensor 2, and the detected real-time temperature can be transmitted to the circuit board 3. The circuit board 3 can control the infrared electrothermal coating according to the real-time temperature. The temperature of layer 111a and/or infrared electrothermal coating 111b.

Figure 8 is a schematic diagram of the control curve of the heater provided by the embodiment of the present application.

In Figure 8, the abscissa t represents time, 0 to t5 is the control period of the infrared electrothermal coating 111a area, and the ordinate T represents the temperature of the infrared electrothermal coating 111a area. This temperature value can be detected and fed back by the temperature sensor 2. During the entire control period of the infrared electrothermal coating area 111a, the heating power provided by the power supply is controlled based on the temperature information of the infrared electrothermal coating area 111a.

The following description takes the heater 11 of the example in Figures 3 and 4 as an example:

1. During the period from 0 to t1, the control power supply provides heating power to the infrared electrothermal coating 111a, so that the temperature in the area of the infrared electrothermal coating 111a rises from the initial temperature to the first preset target temperature T1.

The initial temperature can be the ambient temperature or a temperature greater than the ambient temperature.

The first preset target temperature T1 is between 230°C and 300°C, preferably between 240°C and 300°C, more preferably between 240°C and 290°C, and still more preferably between 240°C and 280°C. In a specific example, it can be set to 250°C, 260°C, 270°C, etc.

Generally, during the duration of this period, the control power supply is provided to the infrared electrothermal coating 111a with maximum heating power, for example: 20w~40w heating power, so that the temperature of the infrared electrothermal coating 111a area can quickly rise to the first level. Preset target temperature T1.

Generally, the starting time of the period 0 to t1 is a predetermined time after the controller 32 receives the start signal (including the time of receiving the start signal and a certain time after receiving the start signal). At this time, the controller 32 starts controlled action. The start signal can be a signal generated by an air flow sensor or a signal generated by a key switch.

2. During the period from t1 to t2, the control power supply provides heating power to the infrared electrothermal coating 111a so that the area of the infrared electrothermal coating 111a maintains the first preset target temperature T1.

Generally, during the duration of this period, the control power supply is provided to the infrared electrothermal coating 111a with a relatively small heating power, for example: a heating power of about 5w to 15w, so that the temperature of the infrared electrothermal coating 111a area remains first. Preset target temperature T1. Maintaining the first preset target temperature T1 means that the temperature of the infrared electrothermal coating 111a area can fluctuate up and down the target temperature T1, or the infrared electrothermal coating The temperature in area 111a does not exceed the target temperature T1.

The period from 0 to t2 can also be called the preheating stage or preheating period. The duration of this period ranges from 10s to 30s (including endpoint values), for example, it can be 12s, 15s, 20s, 25s, 30s, etc. Prompt information can be generated at time t2 to prompt the user to inhale the aerosol; the prompt method includes but is not limited to sound, light, vibration, etc. The period from t2 to t5 can also be called the inhalation period. During this period, the user can inhale the aerosol generated by the aerosol-generating matrix.

During the period from 0 to t2, since the power supply does not provide heating power to the infrared electrothermal coating 111b, that is, only the infrared electrothermal coating 111a starts heating, but the infrared electrothermal coating 111b does not start heating. In other words, the aerosol-generating product that is heated at this time is only the first part of the product corresponding to the infrared electrothermal coating 111a. Compared with the entire aerosol-generating product, the heated part is smaller; on the one hand, it is beneficial to quickly Smokable aerosol is generated, and on the other hand, the water content in the heated product is also relatively reduced, which avoids the problem that the user feels his mouth is burning when inhaling the aerosol (especially when inhaling the first aerosol).

It can be understood that due to the thermal conductivity of the substrate 110, products, etc., the temperatures of the infrared electrothermal coating area 111b and the corresponding second part of the product will slowly rise. The first part of the product corresponding to the infrared electrothermal coating 111a and the second part of the product corresponding to the infrared electrothermal coating 111b area may contain an aerosol-forming matrix of substantially the same composition, or may contain different components. There is no physical isolation between the two partial products, or there is heat transfer between the two partial products.

It should be noted that in other examples, it is also feasible that there is no so-called retention or maintenance period between t1 and t2; at this time, during the period from 0 to t2, the infrared electrothermal coating 111a area can be controlled to have a relatively slow upward trend. (or smaller curve slope), rising from the initial temperature to the first preset target temperature T1.

3. During t2 to t3, the control power supply provides heating power to the infrared electrothermal coating 111a and the infrared electrothermal coating 111b simultaneously, so that the infrared electrothermal coating 111a area maintains the first preset target temperature T1 under the allocated heating power.

The duration between t2 and t3 ranges from 30s to 50s. In a specific example, it may be 40s.

During the duration of this period, the heating power provided by the power supply to the infrared electrothermal coating 111 is distributed to the two heating areas of the infrared electrothermal coating 111a and the infrared electrothermal coating 111b, and the infrared electrothermal coating 111a and the infrared electrothermal coating 111b It is equivalent to two heating areas working in parallel, so the area with smaller resistance will get greater heating power, and vice versa. If the resistance R111a of the infrared electrothermal coating 111a and the infrared The resistance R111b of the electrothermal coating 111b is 3:2, and the heating power provided by the power supply is 10w. The heating power allocated to the infrared electrothermal coating 111a area is 4w, and the heating power allocated to the infrared electrothermal coating 111b area is 6w.

Similar to the period t1 to t2, during the period t2 to t3, the power supply can be controlled to provide relatively small heating power to the infrared electrothermal coating 111, for example: a heating power of about 5w to 15w, so that the infrared electrothermal coating 111a area is in Under the allocated heating power, its temperature can maintain the first preset target temperature T1.

Different from the period from 0 to t2, during the period from t2 to t3, under the allocated heating power (although the power is small) and the temperature difference between the infrared electrothermal coating area 111b and the infrared electrothermal coating area 111a, Temperature can rise rapidly.

4. During t3 to t4, the control power supply provides heating power to the infrared electrothermal coating 111a and the infrared electrothermal coating 111b at the same time, so that the infrared electrothermal coating 111a area drops from the first preset target temperature T1 under the allocated heating power. to the second preset target temperature T2 and maintain the second preset target temperature T2.

The duration between t3 and t4 ranges from 30s to 50s. In a specific example, it may be 40s.

Generally, the difference between the first preset target temperature T1 and the second preset target temperature T2 is between 10°C and 30°C. In a specific example, it can be 20°C.

Similar to the period t2 to t3, during the period t3 to t4, the heating power provided by the power supply is distributed to the infrared electrothermal coating 111a and the infrared electrothermal coating 111b.

Similar to the period t2 to t3, during the period t3 to t4, the power supply can be controlled to provide relatively small heating power to the infrared electrothermal coating 111, for example: a heating power of about 5w to 15w, so that the infrared electrothermal coating 111a area is in Under the allocated heating power, its temperature can drop from the first preset target temperature T1 to the second preset target temperature T2 and maintain the second preset target temperature T2.

What is different from the period from t2 to t3 is that during the period from t3 to t4, under the allocated heating power and the temperature difference between the infrared electrothermal coating area 111a and the infrared electrothermal coating area 111a, the temperature change is the same as that of the infrared electrothermal coating area. The changes in the coating 111a area are approximately the same.

5. During t4 to t5, the control power supply provides heating power to the infrared electrothermal coating 111a and the infrared electrothermal coating 111b at the same time, so that the infrared electrothermal coating 111a area drops from the second preset target temperature T2 under the allocated heating power. to the third preset target temperature T3 and maintain the third preset target temperature T3.

The duration between t4 and t5 ranges from 30s to 200s.

Generally, the difference between the second preset target temperature T2 and the third preset target temperature T3 is between 10°C and 20°C. In a specific example, it can be 15°C.

Similar to the period from t3 to t4, during the period from t4 to t5, the heating power provided by the power supply is distributed to the infrared electrothermal coating area 111a and the infrared electrothermal coating area 111b.

Similar to the period from t3 to t4, during the period from t4 to t5, the power supply can be controlled to provide relatively small heating power to the infrared electrothermal coating 111, for example, a heating power of about 5w to 15w, so that the infrared electrothermal coating 111a area is in Under the allocated heating power, its temperature can drop from the second preset target temperature T2 to the third preset target temperature T3 and maintain the third preset target temperature T3.

Similar to the period t3 to t4, during the period t4 to t5, the temperature change of the infrared electrothermal coating area 111b is the same as that of the infrared electrothermal coating area under the allocated heating power and the temperature difference with the infrared electrothermal coating area 111a. The changes in area 111a are roughly the same.

It should be noted that during the period from t4 to t5, the temperature difference between the infrared electrothermal coating 111a area and the infrared electrothermal coating 111b area is determined by the resistance relationship between them: that is, if the resistance values of the two are the same , there may be no temperature difference between the two; if the resistance values of the two are different, and the area with the smaller resistance value is allocated larger heating power, the temperature of the area with the smaller resistance value will be higher than that of the area with the larger resistance value. The temperature of the area. Based on this characteristic, during actual operation, the overall resistance of the infrared electrothermal coating 111b is reduced through the connection electrode 112d and the connection electrode 112e. On the one hand, it is beneficial for the infrared electrothermal coating 111b to obtain greater heating power during the period t4 to t5. The temperature of the infrared electrothermal coating 111b is made higher than the temperature of the infrared electrothermal coating 111a to avoid the problem of less aerosol being generated during t4 to t5, which leads to a decrease in the user's puffing experience, while maintaining the consistency of puffing; another On the other hand, the partial products corresponding to the infrared electrothermal coating 111b are heated later than the partial products corresponding to the infrared electrothermal coating 111a. By reducing the overall resistance of the infrared electrothermal coating 111b through the connecting electrode 112d and the connecting electrode 112e, it can ensure The part of the product corresponding to the infrared electrothermal coating 111b is fully heated, or in other words, the waste caused by the part of the product not being fully heated is avoided.

At time t5, one aerosol-generating product has been or is deemed to be exhausted. At this time, the power supply can be controlled to stop providing heating power to the infrared electrothermal coating 111. Further, prompt information can be generated to prompt the user to replace the aerosol-generating product or that the aerosol-generating product has been consumed; the prompting method includes but is not limited to sound, light, vibration, etc.

It should be noted that the control curve shown in Figure 8 can also be applied to other heating methods, such as resistance heating, electromagnetic heating, air heating, etc.

It should be noted that in other examples, it is also feasible that there is no so-called temperature decreasing trend during the period from t3 to t5; at this time, during the period from t3 to t5, the power supply can be controlled to supply the infrared electrothermal coating 111a and the infrared electrothermal coating 111b simultaneously. Provide heating power to maintain the temperature of the infrared electrothermal coating area 111a The first preset target temperature T1.

Figure 9 is a schematic diagram of the actual temperature curve of the heater provided by the embodiment of the present application.

Based on the heater 11 in the example of Figures 3 and 4, the control curve shown in Figure 8 is used to control the heater 11, and then the real-time temperatures of the infrared electrothermal coating 111a area and the infrared electrothermal coating 111b area are measured through two temperature sensors. (The temperature sensor in the infrared electrothermal coating 111a area can be the existing temperature sensor in the examples in Figures 3 and 4), and finally a schematic curve diagram of time and temperature is obtained.

As shown in Figure 9, S1 is a schematic diagram of the time and temperature curve in the area of the infrared electrothermal coating 111a, and S2 is a schematic diagram of the time and temperature curve in the area of the infrared electrothermal coating 111b.

It should be noted that the “control curve” indicates that the controller 32 controls the operation of the heater 11 according to the curve, and the “temperature curve” indicates the relationship between the temperature generated during the operation of the heater 11 and time. The controller 32 may be part of the circuit board 3, including but not limited to an MCU.

During the period of 0 to 30 seconds (corresponding to the control period of 0 to t2 in Figure 8), the temperature of the infrared electrothermal coating 111a area rises from the initial temperature (about 28°C) to about 270°C. Since heating is not started in the infrared electrothermal coating area 111b, the temperature of the infrared electrothermal coating area 111b slowly rises to about 80°C under the effect of heat transfer.

During the period of 30s to 70s (corresponding to the control period t2 to t3 in Figure 8), since at 30s, the infrared electrothermal coating 111b and the infrared electrothermal coating 111a start heating at the same time, the temperature of the infrared electrothermal coating 111b area rises rapidly. The temperature of the infrared electrothermal coating area 111a tends to be flat (slightly decreased).

During the period of 70s to 110s (corresponding to the control period t3 to t4 in Figure 8), the temperature of the infrared electrothermal coating 111a area dropped to about 230°C, and the temperature change of the infrared electrothermal coating 111b area was consistent with that of the infrared electrothermal coating 111a area. The temperature changes are roughly the same.

During the period of 110s to 240s (corresponding to the control period t4 to t5 in Figure 8), the temperature of the infrared electrothermal coating area 111a dropped to about 210°C, and the temperature change of the infrared electrothermal coating area 111b was consistent with that of the infrared electrothermal coating area 111a The temperature changes are roughly the same. Afterwards, at about 140 s, the temperature of the infrared electrothermal coating area 111b reaches equilibrium with the temperature of the infrared electrothermal coating area 111a. During 140s to 240s, since the resistance of the infrared electrothermal coating 111b is smaller than the resistance of the infrared electrothermal coating 111a, the temperature of the infrared electrothermal coating 111b area is significantly higher than the temperature of the infrared electrothermal coating 111a area.

It should be noted that the preferred embodiments of the present application are given in the description and drawings of the present application. However, the present application can be implemented in many different forms and is not limited to the implementation described in the present specification. Examples, these examples are not used as additional limitations on the content of the present application, and the purpose of providing these examples is to provide a more thorough and comprehensive understanding of the disclosure content of the present application. Moreover, the above technical features can be continuously combined with each other to form various embodiments not listed above, which are all deemed to be within the scope of the description of this application; further, for those of ordinary skill in the art, they can be improved or transformed according to the above description. , and all these improvements and transformations should fall within the protection scope of the claims appended to this application.

Claims (17)

1. An aerosol generating device configured to heat an aerosol-forming substrate to generate an aerosol; the aerosol-generating substrate includes a first part of the aerosol-generating substrate and a second part of the aerosol-generating substrate; characterized in that the aerosol-generating substrate Devices include:

   power supply;

   a heater comprising a first heating zone for heating the first portion of the aerosol-forming substrate and a second heating zone for heating the second portion of the aerosol-forming substrate;

   Controller, configured as:

   During the first part of the control period of the heater, the power supply is controlled to only provide heating power to the first heating zone so that the temperature of the first heating zone rises from an initial temperature to a first preset target temperature. ;

   controlling the power supply to provide heating power to the first heating zone and the second heating zone simultaneously during the remainder of the control period of the heater;

   Wherein, the duration of the first part period ranges from 10s to 30s.
2. The aerosol generating device according to claim 1, wherein the aerosol generating device has a mouth end and a distal end opposite to the mouth end;

   Wherein, the first part of the aerosol-forming substrate is closer to the mouth end than the second part of the aerosol-forming substrate.
3. The aerosol generating device according to claim 1, characterized in that both the first heating area and the second heating area can be independently controlled; or, the first heating area can be independently controlled, The second heating zone cannot be independently controlled.
4. The aerosol generating device according to claim 1, further comprising a temperature sensor for measuring temperature information of the first heating area;

   The controller is configured to control the heating power provided by the power supply according to the temperature information of the first heating area fed back by the temperature sensor during the entire control period of the heater.
5. The aerosol generating device according to claim 1, wherein the starting time of the first part period is a predetermined time after the controller receives the start signal.
6. The aerosol generating device according to claim 1, wherein the first part period includes a first duration and a second duration;

   The controller is configured as:

   During the first duration, control the power supply to provide first heating power to the first heating area so that the temperature of the first heating area rises from an initial temperature to a first preset target temperature;

   During the second duration, control the power supply to provide second heating power to the first heating area so that the temperature of the first heating area maintains a first preset target temperature;

   Wherein, the second heating power is smaller than the first heating power.
7. The aerosol generating device according to claim 1, wherein the remaining period includes a third duration;

   The controller is configured to, during the third duration, control the power supply to simultaneously provide heating power to the first heating area and the second heating area, so that the temperature of the first heating area maintains a third A preset target temperature.
8. The aerosol generating device according to claim 1, wherein the remaining period includes a fourth duration;

   The controller is configured to, during the fourth duration, control the power supply to provide heating power to the first heating area and the second heating area simultaneously, so that the temperature of the first heating area changes from the The first preset target temperature drops to the second preset target temperature and maintains the second preset target temperature.
9. The aerosol generating device according to claim 8, wherein the remaining period includes a fifth duration;

   The controller is configured to, during the fifth duration, control the power supply to provide heating power to the first heating area and the second heating area simultaneously, so that the temperature of the first heating area drops to Before the second preset target temperature, the first preset target temperature is dropped to the third preset target temperature and the third preset target temperature is maintained.
10. The aerosol generating device according to claim 8, wherein the remaining period includes a moment when the temperature between the first heating area and the second heating area reaches equilibrium;

    The moment when the temperature of the first heating zone drops to the second preset target temperature is earlier than the moment when the temperature between the first heating zone and the second heating zone reaches equilibrium.
11. The aerosol generating device according to claim 1, wherein the remaining period includes a sixth duration; wherein the end time of the sixth duration is the end time of the control period of the heater;

    The controller is configured to, during the sixth duration, control the power supply to the first heating The heating power is provided simultaneously by the heating zone and the second heating zone, so that the temperature of the first heating zone is smaller than the temperature of the second heating zone.
12. The aerosol generating device of claim 1, wherein the first heating zone and the second heating zone are configured to operate in parallel during the remainder;

    Wherein, the heating power provided by the power supply during the remaining part is distributed to the first heating area and the third heating area according to a preset resistance relationship between the first heating area and the second heating area. Two heating areas.
13. The aerosol generating device according to claim 12, wherein the resistance of the first heating area is greater than the resistance of the second heating area.
14. The aerosol generating device according to claim 1, wherein the heater includes:

    matrix;

    An infrared electric heating coating is provided on the surface of the substrate; the infrared electric heating coating includes a first infrared electric heating coating that defines the first heating area, and a second infrared electric heating coating that defines the second heating area. electrothermal coating;

    A conductive element including a first conductive electrode, a second conductive electrode and a third conductive electrode spaced apart from each other on the surface of the base;

    Wherein, the power supply provides heating power to the first infrared electrothermal coating through the first conductive electrode and the third conductive electrode, and provides heating power to the third conductive electrode through the second conductive electrode and the third conductive electrode. Two infrared electric heating coatings provide heating power.
15. The aerosol generating device according to claim 14, wherein the conductive element further includes at least one connecting electrode;

    The at least one connecting electrode is used to separate the second infrared electrothermal coating into at least two sub-infrared electrothermal coatings connected in series between the second conductive electrode and the third conductive electrode.
16. A method of controlling an aerosol-generating device configured to heat an aerosol-forming substrate to generate an aerosol; the aerosol-generating device includes a power source, a first portion of the aerosol-forming substrate for heating the first portion of the aerosol-forming substrate. A heating area and a second heating area for heating the second part of the aerosol-forming substrate; the aerosol-generating substrate includes a first part of the aerosol-generating substrate and a second part of the aerosol-generating substrate; characterized in that, Control methods include:

    During the first part of the control period of the heater, the power supply is controlled to supply only the first The thermal zone provides heating power so that the temperature of the first heating zone rises from an initial temperature to a first preset target temperature;

    controlling the power supply to provide heating power to the first heating zone and the second heating zone simultaneously during the remainder of the control period of the heater;

    Wherein, the duration of the first part period ranges from 10s to 30s.
17. A method of generating an aerosol from an aerosol generating matrix using an aerosol generating device,

    The aerosol-generating substrate includes a first part of the aerosol-generating substrate and a second part of the aerosol-generating substrate; the aerosol-generating device includes a first heating area for heating the first part of the aerosol-generating substrate; said second portion of the aerosol forming second heated region of the matrix;

    It is characterized in that the method includes:

    During the first part of the control period of the heater, the first heating zone initiates heating and rises from an initial temperature to a first preset target temperature, while the second heating zone does not initiate heating;

    During the remainder of the control period of the heater, the first heating zone and the second heating zone initiate heating simultaneously;

    Wherein, the duration of the first part period ranges from 10s to 30s.