CN115868687A - Gas mist generating device and heater for gas mist generating device - Google Patents

Abstract

The present application proposes an aerosol generating device and a heater for the aerosol generating device; wherein the aerosol generating device includes: a heater for heating an aerosol generating product; the heater has a first section and a second section section; wherein the second section is a heating zone mainly used to heat the aerosol-generating article, the first section is located upstream of the second section; the circuit is programmed to monitor the temperature change of the first section to detect the use of The change in the airflow drawn by the heater through the heater. The above aerosol generating device determines the user's inhalation action by monitoring the temperature change of the first section.

Description

Aerosol generating device and heater for aerosol generating device

technical field

The embodiments of the present application relate to the technical field of heat-not-burn smoking appliances, and in particular to an aerosol generating device and a heater used in the aerosol generating device.

Background technique

Smoking articles (eg, cigarettes, cigars, etc.) burn tobacco during use to produce tobacco smoke. Attempts have been made to replace these tobacco-burning products by making products that release compounds without burning them.

An example of such a product is a heating device, which releases a compound by heating rather than burning a material. For example, the material may be tobacco or other non-tobacco products, which may or may not contain nicotine. As a known heating device, Patent No. CN201280060087.0 proposes a method of monitoring the airflow change during the user's puffing process by detecting the power change, and then determining the user's puffing action according to the airflow change.

Contents of the invention

An embodiment of the present application provides an aerosol generating device for heating an aerosol generating product to generate an aerosol; comprising:

A heater for heating the aerosol-generating article; the heater has a first section and a second section; wherein the second section is a heating area mainly used for heating the aerosol-generating article, and the first a section upstream of the second section;

A circuit programmed to monitor changes in temperature of the first section to detect changes in airflow past the heater indicative of user inhalation.

As used herein, the relative positions of "upstream" and "downstream" are described based on the direction of air flow through the aerosol-generating device when the user inhales the aerosol-generating article. Specifically in an aerosol generating device, the relative positions of "upstream" and "downstream" are described relative to the direction in which the airflow is drawn from the air inlet end to the air outlet end; ” is the side of the airflow close to the user’s lips where it is drawn in, and “upstream” is the side of the airflow away from the user’s lips.

In a more preferred implementation, the circuitry is programmed to monitor the temperature of the first zone as a difference from a preset value to detect a change in airflow past the heater indicative of inhalation by the user.

In a more preferred implementation, the circuit is programmed to monitor when the temperature of the first zone drops by 10°C to 100°C from a preset value, so as to detect the air that is inhaled by the user and passes through the heater. changes in airflow.

In a more preferred implementation, it also includes:

The airflow channel at least partially defines the airflow path that flows sequentially through the first section and the second section when the user inhales.

In a more preferred implementation, further comprising: a chamber having axially opposite first and second ends; in use, an aerosol-generating article is at least partially receivable in said chamber through said first end ;

The first section is closer to the second end of the chamber than the second section.

In a more preferred implementation, the heater is provided with a first temperature sensor for sensing the temperature of the first section;

The circuit monitors the temperature change of the first section through the first temperature sensor.

In a more preferred implementation, the first temperature sensor includes a first galvanic wire and a second galvanic wire connected to the first section.

In a more preferred implementation, the first temperature sensor is exposed on the outer surface of the heater.

In a more preferred implementation, a recessed area is provided on the surface of the first section, and the first temperature sensor is at least partially located in the recessed area.

In a more preferred implementation, the heater further includes a base, and the aerosol generating device provides support for the heater through the base.

In a more preferred implementation, the first temperature sensor runs through the base.

In a more preferred implementation, the heater is further provided with a second temperature sensor for sensing the temperature of the second section.

In a more preferred implementation, the heater has an axially extending hollow; the second temperature sensor is at least partially accommodated in the hollow.

In a more preferred implementation, the second temperature sensor comprises a conductive trace formed in the second section.

In a more preferred implementation, said first section has an extension length which is smaller than said second section.

In a more preferred implementation, said heater has a free front end for insertion into an aerosol generating article, and an end opposite said free front end; said first section being adjacent to said end.

In a more preferred implementation, the extension length of the first section from the end to the free front end is 2-8 mm.

In a more preferred implementation, the heater is a sensory heater that is penetrated by a changing magnetic field and generates heat; the heater includes:

A first sensing part and a second sensing part arranged along the length direction, the first sensing part and the second sensing part are detachably connected.

In a more preferred implementation, the heater has a free front for insertion into an aerosol generating article, and an end opposite to the free front; the first sensing portion defines the free front, the second Two sensory moieties define the terminus.

In a more preferred implementation, the first temperature sensor is connected to a portion of the second sensing portion close to the end.

In a more preferred implementation, the second sensing portion has an upper end adjacent to the first sensing portion;

The heater is provided with a second temperature sensor; the second temperature sensor is connected to the upper end.

In a more preferred implementation, the second temperature sensor penetrates through the second sensing portion along the axial direction of the second sensing portion.

In a more preferred implementation, said second section is a heating zone primarily for heating the aerosol-generating article.

Yet another embodiment of the present application also proposes an aerosol generating device for heating an aerosol generating product to generate an aerosol; comprising:

a heater for heating the aerosol-generating article; the heater has a first section and a second section arranged in sequence, and air flows through the first section and the second section sequentially when the user inhales;

A circuit programmed to monitor changes in temperature of the first section to detect changes in airflow past the heater indicative of user inhalation.

Yet another embodiment of the present application also proposes an aerosol generating device for heating an aerosol generating product to generate an aerosol; comprising:

a heater for heating an aerosol-generating product; the heater has an opposite front end and an end; a first temperature sensor and a second temperature sensor are arranged at intervals on the heater, and the first temperature sensor is higher than the first temperature sensor a second temperature sensor closer to the end;

A circuit programmed to monitor changes in temperature sensed by the first temperature sensor to detect changes in airflow past the heater indicative of user inhalation.

Yet another embodiment of the present application also proposes an aerosol generating device for heating an aerosol generating product to generate an aerosol; comprising:

a chamber having opposing first and second ends and forming an opening at said first end; in use, an aerosol-generating article is receivable into said chamber from said first end through said opening ;

a heater extending at least partially within the chamber for heating the aerosol-generating article;

a temperature sensor, located in the chamber and arranged near the second end; the temperature sensor is combined with the heater;

A circuit programmed to monitor changes in temperature sensed by the temperature sensor to detect changes in air flow past the heater indicative of user inhalation.

Another embodiment of the present application also proposes a heater for an aerosol generating device, the heater includes a front end and an end along the length direction; the heater is provided with:

A first temperature sensor and a second temperature sensor, the first temperature sensor being closer to the end than the second temperature sensor.

The above aerosol generating device determines the user's inhalation action by monitoring the temperature change of the first section.

Description of drawings

One or more embodiments are exemplified by the pictures in the corresponding drawings, and these exemplifications do not constitute a limitation to the embodiments. Elements with the same reference numerals in the drawings represent similar elements. Unless otherwise stated, the drawings in the drawings are not limited to scale.

Fig. 1 is a schematic diagram of an aerosol generating device provided by an embodiment of the present application;

Fig. 2 is a structural schematic diagram of another viewing angle of the heater in Fig. 1;

Fig. 3 is a schematic cross-sectional view of a viewing angle of the heater in Fig. 2;

Fig. 4 is an exploded schematic diagram of a viewing angle of the heater in Fig. 2;

Fig. 5 is a schematic cross-sectional view of another viewing angle of the first part in Fig. 4;

Fig. 6 is a schematic structural diagram of an aerosol generating device provided by another embodiment;

Fig. 7 is a structural schematic diagram of another viewing angle of the heater in Fig. 6;

Fig. 8 is a schematic structural view of a heater provided in yet another embodiment;

Fig. 9 is a schematic structural view of a heater provided in yet another embodiment;

Fig. 10 is a schematic structural diagram of a heater provided in yet another embodiment.

Detailed ways

In order to facilitate the understanding of the present application, the present application will be described in more detail below in conjunction with the accompanying drawings and specific implementation methods.

An embodiment of the present application proposes an aerosol generating device, the structure of which can be seen in Figure 1, including:

a chamber 50 within which the aerosol-generating article A is removably received;

A magnetic field generator, such as an induction coil L, for generating a changing magnetic field under an alternating current;

The heater 30, at least partly extending in the chamber, is configured to be inductively coupled with the inductance coil L to generate heat when penetrated by a changing magnetic field, thereby heating the aerosol-generating product A such as a cigarette, so that the aerosol-generating product A At least one component of volatilization forms an aerosol for inhalation;

The cell 10 is a rechargeable DC cell that can output DC current;

The circuit 20 is connected to the rechargeable battery cell 10 through proper electrical connection, and is used to convert the DC current output by the battery cell 10 into an alternating current with a suitable frequency and then supply it to the inductance coil L.

Specifically, referring further to FIG. 1 , the chamber 50 has a first end 51 and a second end 52 located opposite to each other. Wherein the first end 51 of the chamber 50 is open and the second end 52 of the chamber 50 is substantially closed; the aerosol-generating article A is removably received in the chamber through the opening of the first end 51 in use. chamber 50, and substantially abuts against the second end 52 of the chamber 50 to form a stop when received in the chamber 50. Meanwhile, in this implementation, when the aerosol generating product A is received into the chamber 50, the heater 30 is inserted into the aerosol generating product A to heat it.

According to the setting in use of the product, the inductor coil L may include a cylindrical inductor coil wound in a helical shape, as shown in FIG. 1 . The helically wound cylindrical inductor L may have a radius r in the range of about 5 mm to about 10 mm, and in particular the radius r may be about 7 mm. The length of the helically wound cylindrical inductor L may range from about 8 mm to about 14 mm, and the number of turns of the inductor L may range from about 8 turns to 15 turns. Accordingly, the internal volume may be in the range of about 0.15 cm ³ to about 1.10 cm ³ .

In a more preferred implementation, the frequency of the alternating current supplied by the circuit 20 to the induction coil L is between 80KHz-400KHz; more specifically, the frequency may be in the range of about 200KHz-300KHz.

In a preferred embodiment, the DC power supply voltage provided by the battery cell 10 is in the range of about 2.5V to about 9.0V, and the amperage of the DC current provided by the battery cell 10 is in the range of about 2.5A to about 20A.

In a preferred embodiment, the heater 30 is generally in the shape of a pin or a needle or a rod or a column or a blade, which is advantageous for being inserted into the aerosol generating article A; mm in length, about 4 mm in width and about 0.5 mm in thickness, and may be made of grade 430 stainless steel (SS430). As an alternative embodiment, heater 30 may have a length of about 12 mm, a width of about 5 mm, and a thickness of about 0.5 mm, and may be made of grade 430 stainless steel (SS430). In other variant embodiments, the heater 30 can also be configured in a cylindrical shape; when in use, its inner space is used to receive the aerosol-generating product A, and heat the outer periphery of the aerosol-generating product A , to generate aerosols for inhalation. The heater 30 may also be made of grade 420 stainless steel (SS420), and alloy materials containing iron and nickel, such as permalloy.

In the embodiment shown in FIG. 1 , the aerosol generating device further includes a bracket 40 for arranging the inductance coil L and/or the heater 30 , and the material of the bracket 40 may include high-temperature-resistant non-metallic materials such as PEEK or ceramics. In implementation, the inductance coil L is wound on the outer wall of the bracket 40 and then fixed. Meanwhile, as shown in FIG. 1 , the bracket 40 has a hollow tubular shape, and a part of the tubular hollow space forms the chamber 50 for receiving the aerosol generating product A mentioned above.

In a preferred embodiment, the detailed structure of the heater 30 is shown in FIG. 2 to FIG. End 320 ; as shown in FIG. 1 , the front end 310 is a free end extending into the chamber 50 , and is configured in a pointed shape for easy insertion into the aerosol generating product A.

In use, as shown in FIG. 2, the heater 30 basically includes a first section S1 and a second section S2; in practice, the second section S2 is a section mainly inserted into the aerosol generating product A for heating. section; usually in operation, the heating temperature of the second section S2 is kept at 280-320°C, which is the main high-temperature heating area. The first section S1 is close to the end 320 , and because it is away from the center, the temperature of this section is generally about 50-80° C. lower than the highest temperature region of the heater 30 during use.

And during the suction, the airflow, as shown by the arrow R in the figure, flows through the first section S1 and the second section S2 in sequence until it is inhaled by the user. Since the first section S1 is far away from the center and is a non-high-temperature section, and the cold air flows through the first section S1 first during suction, the heat exchange to this section is relatively large during suction, so that the temperature drop in this section is more significant ; Then, when the air continues to flow through the second section S2, it already has a certain temperature, so that the temperature drop of the second section S2 is relatively less and basically insignificant. Then in practice, by monitoring the obvious change of the temperature of the first section S1, it can be used to determine the user's puffing action.

The specific temperature sensing and matching structure of the heater 30 is shown in Fig. 2 to Fig. 4 in an embodiment, the heater 30 in this embodiment includes:

The first sensing part 31 and the second sensing part 32 are arranged in sequence along the length direction; wherein, the first sensing part 31 is close to the front end 310 , and the second sensing part 32 is close to the end 320 .

In a preferred implementation, the first sensing part 31 and the second sensing part 32 are detachably connected. And in a preferred implementation, the surfaces of the first sensing portion 31 and the second sensing portion 32 are evenly joined.

In the preferred implementation shown in FIGS. 2 and 3 , after assembly, the first sensing portion 31 has a tapered section 311 with a gradually decreasing outer diameter, and is bounded by the tapered section 311 with a gradually decreasing outer diameter. front end 310; and, in the preferred implementation shown in FIGS.

2 and 3, the second sensing part 32 has a base 321 extending radially outward at the end 320, and the aerosol generating device or bracket 40 clamps or fixes the base 321 during assembly. Furthermore, the heater 30 is stably held in the gas mist generating device. Furthermore, after assembly, the second sensing part 32 is fixed and maintained in the aerosol generating device, and the first sensing part 31 can be disassembled or removed.

Referring further to FIG. 3 to FIG. 5 , the first sensing portion 31 has a first hollow 312 extending in the axial direction; of course, the first hollow 312 has an opening facing away from the front end 310 . After assembly, the second sensing portion 32 extends at least partially into the first hollow 312 . As shown in FIG. 5 , an internal thread 313 is disposed on the inner wall of the first hollow 312 .

Referring further to FIG. 4 , the second sensing part 32 has a connecting part 323 with an outer diameter smaller than other parts; and, the connecting part 323 is provided with an external thread 324 . Furthermore, during assembly, the connecting portion 323 extends into the first hollow 312 of the first sensing portion 31, and through the cooperation of the internal thread 313 and the external thread 324, the first sensing portion 31 and the second sensing portion 32 can be stabilized. Disconnect the connection.

Of course, after assembly, the first sensing part 31 and the second sensing part 32 conduct heat with each other.

Further in a preferred implementation, the internal thread 313 and/or the external thread 324 adopts a left-handed thread, that is, the helical direction of the internal thread 313 and/or the external thread 324 is counterclockwise. The use of left-handed thread is beneficial to prevent loosening between the internal thread 313 and the external thread 324 during use or vibration.

Further in a preferred implementation, the number of turns of the internal thread 313 and/or the outer thread 324 can be 1-20 turns; more preferably, the number of turns of the inner thread 313 and/or the outer thread 324 is 2-8 turns.

Referring further to FIG. 3 and FIG. 4 , the second sensing portion 32 has a second hollow 322 penetrating in the axial direction. The heater 30 also includes a first galvanic wire pin 341 and a second galvanic wire pin 342, the first galvanic wire pin 341 and the second galvanic wire pin 342 are welded such as laser welding, resistance welding or argon arc welding, etc. to connect to the upper end of the second sensing part 32, and use different galvanic couple materials respectively, and then form a thermocouple that can be used for temperature measurement between them. After assembly, the first galvanic wire pin 341 and the second galvanic wire pin 342 connected to the upper end of the second sensing portion 32 are in contact with the inner top wall of the first hollow 312 of the first sensing portion 31 .

In a more preferred implementation, the first galvanic wire 331 and the second galvanic wire 332 pass through the second hollow 322 from the second sensing portion 32 to the outside of the end 320 to facilitate connection with the circuit 20 .

In practice, the extension length of the second sensing part 32 is about 8-15 mm; the first sensing part is about 3-8 mm; the first hollow 312 of the first sensing part 31 has an extension length of about 3-5 mm. After assembly, the first galvanic wire 331 and the second galvanic wire 332 are connected to the position of the second sensing part 32, which is basically in the highest temperature region of the temperature field during the operation of the heater 30; then the first galvanic wire 331 and The thermocouple formed by the second galvanic wire 332 is basically used to detect the temperature in the highest temperature region of the temperature field of the heater 30 during operation.

Further referring to FIG. 2 and FIG. 4 , in a more preferred implementation, a recessed area 325 near the base 321 /end 320 is provided on the outer surface of the second sensing portion 32 of the heater 30 . The third galvanic wire pin 351 and the fourth galvanic wire pin 352 are connected by welding such as laser welding, resistance welding or argon arc welding in the recessed area 325; The fourth galvanic couple wire pins 352 are made of different galvanic couple materials, and a thermocouple for sensing temperature is formed between them.

Further referring to FIG. 1 and FIG. 2, in the process of the user inhaling the aerosol generating product A, the suction air flow is inhaled by the user after passing through the aerosol generating product A through the second end 52 of the chamber 50, as shown in FIG. 1 and arrow R in Fig. 2. While the heater 30 is inserted into the aerosol generating product A, the suction airflow will flow through the surface of the heater 30 during the suction process. And when the user sucks, the concave region 325 of the second feeling part 32 is close to the second end 52 of the chamber 50, and when the cold air enters from this part and flows through the concave region 325, the surface of the concave region 325 can be heated by heat exchange. The temperature drops, and by sampling the temperature sensing signal of the thermocouple formed between the third galvanic wire pin 351 and the fourth galvanic wire pin 352 , the user's pumping action can be determined through the temperature change.

In yet another preferred implementation, usually the heating temperature of the heater 30 is kept at 280-320° C., and the region where the thermocouple formed by the first galvanic wire 331 and the second galvanic wire 332 is located is the closest to and equal to the above operating temperature. And the region sensed by the thermocouple formed by the third galvanic wire pin 351 and the fourth galvanic wire pin 352 is close to the end 320, and the temperature of this part is usually lower than the highest temperature region of the heater 30 by about 50°C. In practice, usually when the airflow flows through the area sensed by the thermocouple formed by the third galvanic wire pin 351 and the fourth galvanic wire pin 352 during the suction process, the temperature of this position is higher than that of the non-suction The normal temperature value drop range is between 10°C and 100°C.

Further, the circuit 20 is also programmed to detect when the sensed temperature of the thermocouple formed by the third galvanic wire pin 351 and the fourth galvanic wire pin 352 falls within a range of 10°C to 100°C lower than the preset value, Determine if the user's puff is appropriate. In a more preferred implementation, it can be determined that the user's puffing action is more accurate when it is detected that the sensing temperature of the thermocouple has a temperature drop range of 20°C to 70°C. Of course, the above preset value is the normal temperature value of the position when the part is not being sucked.

Further, the circuit 20 is also programmed to save the user's puffing actions determined above, so as to remind the user of the number of puffs, etc., and present the function of counting puffs.

In a preferred implementation, the recessed depth of the recessed area 325 is about 1-4 mm; the extension length of the recessed area 325 is about 2-8 mm; The distance between the formed temperature-sensing probe and the base 321 is 2-8 mm above.

In a preferred implementation, the third galvanic wire pin 351 and the fourth galvanic wire pin 352 extend through the base 321 to the outside of the end 320 , thereby facilitating electrical connection with the circuit 20 .

In some optional implementations, the first galvanic wire pin 341 and the second galvanic wire pin 342 are made of nickel, nickel-chromium alloy, nickel-silicon alloy, nickel-chromium-copper, constantan, iron-chromium alloy, etc. Made of two different materials in galvanic couple materials. Similarly, the third galvanic wire pin 351 and the fourth galvanic wire pin 352 can also be made of the above two different galvanic couple materials.

For example, in some implementations, the first galvanic wire pin 341 and/or the third galvanic wire pin 351 serve as the positive pole of the thermocouple, the second galvanic wire pin 342 and/or the fourth galvanic wire pin 352 As the negative electrode of the thermocouple, the positive electrode can be made of nickel-chromium alloy wire, and the negative electrode can be made of nickel-silicon alloy wire to form a K-type thermocouple.

Or in yet another variable implementation, the above thermocouple formed by the third galvanic wire pin 351 and the fourth galvanic wire pin 352 for sensing the user's pumping action can be controlled by a thermistor-type temperature sensor. Sensor replacement, such as PT1000, or PTC (positive temperature coefficient) temperature sensor, etc.

Further, Fig. 6 and Fig. 7 show schematic diagrams of an aerosol generating device in yet another variant embodiment, in this implementation, the aerosol generating device includes:

The magnetic field generator, that is, the induction coil L in the figure, is used to generate a changing magnetic field;

A heater 30a extending inside the induction coil L along the axial direction of the induction coil L; the heater 30a is approximately in a tubular shape, and generates heat by being penetrated by a changing magnetic field; at least part of its internal space is defined for The chamber that receives the aerosol-generating article A is heated by transferring heat to the periphery of the aerosol-generating article A.

The heater 30a is provided with a first galvanic wire pin 341a and a second galvanic wire pin 342a for forming a thermocouple between them; mainly for monitoring the working temperature of the heater 30a.

In practice, the connecting portion of the first galvanic wire pin 341a and the second galvanic wire pin 342a to the heater 30a is in the highest temperature region of the temperature field when the heater 30a is working. In practice, usually the distance from the front end or the end is between 1/3-2/3 of the extended length of the heater 30a. In the most preferred implementation, the connection between the first galvanic wire pin 341a and the second galvanic wire pin 342a and the heater 30a is close to the central position of the heater 30a along the length direction, that is, it is basically the same as the front end or the end The distance is between 1/2 of the extended length of the heater 30a.

Further shown in Figure 6 and Figure 7, the heater 30a is also provided with a third galvanic wire pin 351a and a fourth galvanic wire pin 352a near the end portion as the intake end; The thermocouple formed between the wire pin 351a and the fourth thermocouple wire pin 352a is used to sense the temperature drop at the thermocouple of the cold air entering the heater 30a from the end during the suction process, Then the user's pumping action is determined.

In the implementation shown in FIGS. 6 and 7 , the heater 30 a has a radially inwardly extending support portion 311 therein for providing a stop by supporting the aerosol-generating article A when it is received in the heater 30 a. move. And the heater 30a has a vacant section 312a defined between the support portion 311 and the end; the vacant section 312a is mainly used to surround and limit the path of air entering the aerosol generating product A; of course, the vacant section 312a does not receive And avoid aerosol generating product A. Correspondingly, the third galvanic wire pin 351a and the fourth galvanic wire pin 352a are connected to the spare section 312a. In some implementations, the vacant section 312a has a length of about 3-8 mm.

In the preferred implementation shown in Figure 7, the third galvanic wire pin 351a and the fourth galvanic wire pin 352a are connected to the corresponding outer surface of the spare section 312a; The galvanic wire pin 351a and the fourth galvanic wire pin 352a are connected to the inner wall of the empty section 312a.

Or in another variant implementation shown in FIG. 8, at least part of the heater 30b near the end is a tapered section 312b with a gradually decreasing cross-sectional area; To provide a stop through the support when received in the heater 30a; on the other hand, it does not receive and avoid the aerosol generating product A; the third galvanic wire pin 351b and the fourth galvanic wire (not shown) are connected at The conical section 312b is further used to determine the user's puffing action by sensing the temperature change of the conical section 312b during puffing.

Further, a schematic structural view of a heater 30c in another embodiment is shown in FIG. 9; the heater 30c includes:

The sensing body 31c is penetrated by the magnetic field to generate heat; the shape is needle-shaped, pin, columnar or rod-shaped, etc., and the free front end is used to insert into the aerosol generating product A for heating in use; the sensing body 31c has a hollow space extending to the end 311c;

The temperature sensor 34c is at least partly located in the hollow 311c; the temperature sensing probe 341c of the temperature sensor 34c is basically located in the highest temperature region during the work of the sensing body 31c;

The temperature sensor 35c is located outside the feeling body 31c, and is connected to and senses the temperature of the part near the end of the feeling body 31c; when the cold air that has not been heated flows through this area during the suction process, it is sensed by the temperature sensor 35c The drop in temperature can determine the user's puff.

Fig. 10 shows a schematic diagram of a heater 30d in another variant embodiment, in which the heater 30d in this embodiment includes:

Insulating substrate 31d, the material can be ceramics, surface insulating metal, etc.; the shape can be thin sheet, needle or pin, etc.; insulating substrate 31d is rigid, and can be inserted into the aerosol generating product A;

The conductive track 32d is formed on the insulating substrate 31d; specifically, it may be formed by printing, deposition and the like. The conductive track 32d has a suitable positive or negative temperature coefficient of resistance, so that the conductive track 32d can be used not only as a resistance heater, but also as a temperature sensor for sensing temperature. Specifically, on the one hand, when using the first electrical pin 321d and the second electrical pin 322d to supply power to the conductive track 32d to make the conductive track 32d generate heat to heat the aerosol generating product A; The pin 321d and the second electrical pin 322d detect the resistance value of the conductive track 32d to obtain the heating temperature of the conductive track 32d. Of course, the conductive track 32d mainly used for heating is distributed or across the main heating area of the heater 30d/insulating substrate 31d; the conductive track 32d can be a spiral shape, a circuitous reciprocating shape, etc. in shape.

The heater 30d also includes a first galvanic wire pin 351d and a second galvanic wire pin 352d connected to the insulating substrate 31d; the first galvanic wire pin 351d and the second galvanic wire pin 352d their The top end can be connected integrally to form the connecting end 353d by the various welding methods described above, and certainly their connecting end 353d is close to the end of the insulating substrate 31d; A thermocouple formed with the second galvanic wire pin 352d is used to sense the user's puff action.

Further, the heater 30d also includes a base or a flange 33d combined with the insulating substrate 31d, and the aerosol generating device clamps and holds the base or the flange 33d to make the heater 30d stably assembled. Certainly the base or the flange 33d is close to the end of the heater 30d, and the connecting end 353d formed by the first galvanic wire pin 351d and the second galvanic wire pin 352d is exposed outside the base or the flange 33d; And the first galvanic wire pin 351d and the second galvanic wire pin 352d pass through the base or flange 33d.

It should be noted that the preferred embodiments of the application are given in the description of the application and its drawings, but they are not limited to the embodiments described in the description. Further, for those of ordinary skill in the art, they can Improvements or transformations are made according to the above description, and all these improvements and transformations shall fall within the scope of protection of the appended claims of the present application.

Claims (26)

1. An aerosol-generating device for heating an aerosol-generating article to generate an aerosol; it is characterized by comprising:

a heater for heating the aerosol-generating article; the heater has a first section and a second section arranged in sequence; said first section being upstream of said second section, air flowing through said first and second sections in sequence upon inhalation by a user;

circuitry programmed to monitor a change in temperature of the first section to detect a change in airflow through the heater indicative of user inhalation.

2. The aerosol-generating device of claim 1, wherein the circuit is programmed to monitor a difference between the temperature of the first segment and a preset value to detect a change in airflow through the heater indicative of inhalation by a user.

3. An aerosol-generating device according to claim 2, wherein the circuit is programmed to monitor a drop in temperature of the first section from a preset value of between 10 ℃ and 100 ℃ to detect a change in airflow through the heater indicative of a user inhalation.

4. An aerosol-generating device according to any one of claims 1 to 3, further comprising:

an airflow channel at least partially defining an airflow path through the first and second sections in sequence when inhaled by a user.

5. An aerosol-generating device according to any one of claims 1 to 3, further comprising: a chamber having axially opposed first and second ends; in use, an aerosol-generating article is receivable at least partially into the chamber through the first end;

the first section is closer to a second end of the chamber than the second section.

6. An aerosol-generating device according to any one of claims 1 to 3, wherein the heater is provided with a first temperature sensor for sensing the temperature of the first section;

the circuit monitors a change in temperature of the first section via the first temperature sensor.

7. The aerosol-generating device of claim 6, wherein the first temperature sensor comprises a first galvanic wire and a second galvanic wire connected to the first section.

8. The aerosol-generating device of claim 6, wherein the first temperature sensor is exposed at an outer surface of the heater.

9. An aerosol-generating device according to claim 6, wherein the first segment surface is provided with a recessed region, the first temperature sensor being located at least partially within the recessed region.

10. An aerosol-generating device according to claim 6, wherein the heater further comprises a base by which the aerosol-generating device provides retention to the heater.

11. The aerosol-generating device of claim 10, wherein the first temperature sensor extends through the base.

12. An aerosol-generating device according to any one of claims 1 to 3, wherein the heater is further provided with a second temperature sensor for sensing the temperature of the second section.

13. The aerosol-generating device of claim 12, wherein the heater has an axially extending hollow; the second temperature sensor is at least partially housed within the hollow.

14. The aerosol-generating device of claim 12, wherein the second temperature sensor comprises a conductive trace formed in the second section.

15. An aerosol-generating device according to any one of claims 1 to 3, wherein the first section has a smaller extension than the second section.

16. An aerosol-generating device according to any one of claims 1 to 3, wherein the heater has a free front end for insertion into an aerosol-generating article, and a tip end opposite the free front end; the first section is proximate the end.

17. An aerosol-generating device according to claim 16, wherein the first section extends from the tip towards a free leading end for a length of between 2 and 8mm.

18. An aerosol-generating device according to any one of claims 1 to 3 in which the heater is a sensible heater which is penetrated by a varying magnetic field to generate heat; the heater includes:

a first sensing portion and a second sensing portion arranged along the length direction, the first sensing portion being detachably connected to the second sensing portion.

19. The aerosol-generating device of claim 18, wherein the heater has a free front end for insertion into an aerosol-generating article and a terminal end opposite the free front end; the first sensing portion defines the free front end and the second sensing portion defines the distal end.

20. An aerosol-generating device according to claim 19, wherein the first temperature sensor is connected to the second sensing portion adjacent the distal end.

21. The aerosol-generating device of claim 19, wherein the second susceptor portion has an upper end adjacent the first susceptor portion;

a second temperature sensor is arranged on the heater; the second temperature sensor is connected to the upper end.

22. The aerosol-generating device of claim 21, wherein the second temperature sensor extends through the second sensing portion in an axial direction of the second sensing portion.

23. An aerosol-generating device according to any of claims 1 to 3, wherein the second section is a heating region for primarily heating the aerosol-generating article.

24. An aerosol-generating device for heating an aerosol-generating article to generate an aerosol; it is characterized by comprising:

a chamber having opposing first and second ends and forming an opening at the first end; in use, an aerosol-generating article is receivable into the chamber from the first end through the opening;

a heater extending at least partially within the chamber for heating an aerosol-generating article;

a temperature sensor located within the chamber and disposed proximate the second end; the temperature sensor is combined on the heater;

circuitry programmed to monitor changes in temperature sensed by the temperature sensor to detect changes in airflow through the heater indicative of user inhalation.

25. An aerosol-generating device for heating an aerosol-generating article to generate an aerosol; it is characterized by comprising the following steps:

a heater for heating the aerosol-generating article; the heater has opposing front and rear ends; a first temperature sensor and a second temperature sensor are arranged on the heater at intervals, and the first temperature sensor is closer to the tail end than the second temperature sensor;

circuitry programmed to monitor changes in temperature sensed by the first temperature sensor to detect changes in airflow through the heater indicative of user inhalation.

26. A heater for an aerosol-generating device, the heater comprising a housing having a front end and a tip end along a length direction; it is characterized in that the heater is provided with:

a first temperature sensor and a second temperature sensor, the first temperature sensor being closer to the tip than the second temperature sensor.

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