Heating assembly, heating assembly control method and device and aerosol generating device

Abstract

The invention discloses a heating assembly, comprising: a chamber; the conductive heating track is arranged in the cavity, corresponds to a smoke generating section of the aerosol generating product after the aerosol generating product is inserted into the cavity, and comprises a first track and a second track; the second rail and the first rail are oppositely arranged in the first direction, and the first direction is the axial direction or the radial direction of the heating assembly; the capacitance detection circuit is electrically connected with the conductive heating track, the first track and the second track form an electrode pair, and the capacitance detection circuit detects the capacitance of the smoke generation section corresponding to the conductive heating track through the conductive heating track; the heating circuit is electrically connected with the conductive heating track; and one end of the circuit change-over switch is electrically connected with the conductive heating track, and the other end of the circuit change-over switch can be switched between the capacitance detection circuit and the heating circuit. According to the scheme, integration of heating and sensing can be achieved. The invention further discloses a heating assembly control method and device, electronic equipment, a computer readable storage medium and an aerosol generation device.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of new-type tobacco products, in particular to a heating assembly, a heating assembly control method, a heating assembly control device, an electronic device, a computer readable storage medium and an aerosol generating device. BACKGROUND

[0002] In recent years, under the background of global tobacco control and the improvement of health awareness, the market share of traditional cigarettes has gradually decreased, and new-type tobacco products have shown a rapid development trend. New-type tobacco products mainly include smokeless tobacco products, electronic cigarettes and heat-not-burn tobacco products (HNB). Among them, heat-not-burn cigarettes have been highly valued by major tobacco companies because they can provide an experience close to real cigarettes, and have become a long-term strategic focus of industry layout.

[0003] However, existing heat-not-burn products still face significant challenges in user experience consistency, the main reasons for which are as follows:

[0004] (1) Differences in cigarettes themselves: the content of the atomizing agent (mainly composed of water and glycerol / glycerin) in the cigarette is greatly affected by various factors. For example: a) Differences in production processes: the density of the filling of different batches of cigarettes is not uniform; b) Differences in brand formulations: the water and glycerin addition ratios of cigarettes of different brands are different; c) Influence of environmental humidity: the production storage environment and the storage environment after opening can cause changes in the water content of the cigarette (such as dampness). These factors cause great differences in the original content of aerosol that can be generated by different cigarettes or even the same cigarette in different states.

[0005] (2) Lack of effective state detection means: most aerosol generating devices on the market currently use an open-loop control strategy, i.e., heating according to a pre-set, fixed temperature-time curve. This strategy cannot perceive the above-mentioned differences in cigarettes, nor can it detect whether the cigarette has been used or is severely damp, thereby causing at least one of the following situations to occur: the output of cigarette smoke is inconsistent for different cigarettes; during the smoking process of the same cigarette, the amount of smoke in the later puffs significantly decreases as the effective components are consumed; non-standard cigarettes or foreign objects cannot be identified, which poses a safety hazard.

[0006] Capacitive sensing technology is a non-contact measurement method based on the detection of the dielectric properties of a substance. Referring to Figure 1 , a capacitor includes two parallel metal electrode plates (i.e., a first metal electrode plate 101 and a second metal electrode plate 102), and the theoretical calculation formula of the capacitor is: C = εS / d wherein C represents the capacitance value, represents the dielectric constant between the electrode plates of the capacitor, S represents the area of the electrode plates, and d represents the distance between the two electrode plates. When the area S and the distance d of the capacitor electrode plates are fixed, the change in the capacitance value C is only related to the dielectric constant of the filling medium between the electrode plates related. Therefore, by measuring the capacitance value, the characteristics of the medium can be deduced. In the two electrode plates of the capacitor, one of the metal electrode plates is an excitation electrode, and the other metal electrode plate is a detection electrode. When a certain voltage excitation signal is applied to the excitation electrode, an electric field will appear between the two electrode plates. The electric field lines in the electric field will penetrate the measured object 103 in the electric field, and an induced electric displacement field will be generated inside the measured object 103, which will affect the charge distribution on the electrode plates of the capacitor, causing the capacitance value between the excitation electrode and the detection electrode to change. When the medium in the electric field range (i.e. the measured object 103) changes, the change in the dielectric constant of the medium will cause the change in the charge distribution on the electrode, which will eventually be reflected in the change in the detection capacitance value.

[0007] The common aerosol components and their dielectric constants are as follows: the dielectric constant of air is 1, the relative dielectric constant of paper is 2.5, the relative dielectric constant of glycerol / glycerin is 47, and the relative dielectric constant of water is 80. The aerosol of the heat-not-burn cigarette is mainly derived from the atomization of water and aerosol generating agents, including glycerol, glycerol and / or propylene glycol, etc. The dielectric constant of the vapor mixture generated by heating the heat-not-burn cigarette will increase significantly with the increase of the aerosol concentration. Therefore, by detecting the change of the dielectric constant of the area where the cigarette is located by the capacitance sensor, it becomes an effective technical approach to monitor the aerosol content.

[0008] The electrode plate configuration of the capacitance sensor is various, including flat plate, arc, spiral, ring and interdigital (see Figures 2-6 ), which can be selected according to different application scenarios and detection requirements. Specifically, Figure 2 The structure of the flat plate capacitance sensor 01 is shown, which includes a first flat plate electrode plate 011 and a second flat plate electrode plate 012 arranged in opposite directions; Figure 3 The arc capacitance sensor 02 is shown, which includes a first arc electrode plate 021 and a second arc electrode plate 022 arranged in opposite directions; Figure 4 The spiral capacitance sensor 03 is shown, which includes a first spiral electrode plate 031 and a second spiral electrode plate 032; in the ring capacitance sensor, taking a circular ring as an example, Figure 5 The circular ring capacitance sensor 04 is shown, which includes a first circular ring electrode plate 041 and a second circular ring electrode plate 042 arranged in opposite directions in the axial direction; Figure 6 The interdigital capacitance sensor 05 is shown, which includes a first interdigital electrode 051 and a second interdigital electrode 052.

[0009] In the prior art, for example, a heating assembly integrated with a capacitance detection is disclosed in patent CN117652713A. In this scheme, the pole plate of the capacitance sensor is arranged in cross with the heating track of the heating body, wherein the heating track itself can serve as one pole plate of the capacitance, but a separate metal pole plate (such as the pole plate connected to L3 in this patent) dedicated to the capacitance detection is still needed.

[0010] The defect of the above prior art is that the separate capacitance pole plate is only used for sensing function and does not have a heating effect, which occupies the layout space and reduces the heating efficiency. In addition, this scheme has a single function and cannot realize the zoned heating control based on the capacitance detection, and the sensing dimension and control accuracy are limited.

[0011] Therefore, there is an urgent need in the art to develop an intelligent heating system capable of real-time sensing of the cigarette state (not only the total amount, but also the spatial distribution). The primary prerequisite for this system is to integrate a detection device capable of accurate, reliable, multi-dimensional sensing without affecting the heating efficiency. SUMMARY

[0012] The present application provides a heating assembly to solve the above technical problems.

[0013] In a first aspect, embodiments of the present application disclose a heating assembly, comprising:

[0014] a chamber for accommodating an aerosol generating article;

[0015] a conductive heating track arranged in the chamber and corresponding to a smoking segment of the aerosol generating article after the aerosol generating article is inserted into the chamber, comprising:

[0016] a first track;

[0017] a second track arranged opposite to the first track along a first direction, the first direction being an axial direction or a radial direction of the heating assembly;

[0018] a capacitance detection circuit electrically connected to the conductive heating track, the first track and the second track forming an electrode pair, and the capacitance detection circuit detecting a capacitance of the smoking segment corresponding to the conductive heating track through the conductive heating track;

[0019] a heating circuit electrically connected to the conductive heating track and used for controlling the conductive heating track to heat the aerosol generating article;

[0020] a circuit switching switch, one end of the circuit switching switch being electrically connected to the conductive heating track, and the other end of the circuit switching switch being switchable between the capacitance detection circuit and the heating circuit to electrically connect the conductive heating track to the capacitance detection circuit or the heating circuit.

[0021] By adopting the above technical solution, the heating component of the present invention can switch between capacitance detection function and heating function by setting a circuit switching switch. This can make full use of the space of the heating component, and capacitance detection can be performed while ensuring high heating efficiency. The conductive heating track is aligned with the smoke-generating section of the aerosol generating product, which also helps to achieve accurate detection of the capacitance of the smoke-generating section.

[0022] According to another specific embodiment of the present invention, the circuit switching switch is a multiplexer switch, the first track includes a first lead, the second track includes a second lead, both the first lead and the second lead are electrically connected to the first terminal of the multiplexer switch, and the second terminal of the multiplexer switch is electrically connected to a capacitor detection circuit or a heating circuit; the capacitor detection circuit includes an excitation terminal and a detection terminal;

[0023] The first lead and the second lead can be synchronously connected to the capacitor detection circuit via a multiplexer; or, at least one of the first lead and the second lead can be electrically connected to the heating circuit via a multiplexer.

[0024] When the first lead and the second lead are simultaneously electrically connected to the capacitor detection circuit, the first lead is electrically connected to the excitation terminal, and the second lead is electrically connected to the detection terminal.

[0025] According to another specific embodiment of the present invention, the detection end includes a first detection end and a second detection end, and the conductive heating track further includes:

[0026] The third track is arranged opposite to the first track along the first direction. The third track has a third lead, which is electrically connected to the first end of the multiplexer.

[0027] When the conductive heating track is electrically connected to the capacitor detection circuit, the third lead is electrically connected to the excitation end, the first lead is electrically connected to the first detection end, and the second lead is electrically connected to the second detection end.

[0028] According to another specific embodiment of the present invention, the third track is located between the first track and the second track in a first direction.

[0029] According to another specific embodiment of the present invention, the first track and the second track are annular tracks, and the first track and the second track are arranged opposite to each other along the axial direction of the chamber. The chamber includes a smoke-generating section receiving area for receiving the smoke-generating section. The smoke-generating section receiving area extends from at least a portion of the area enclosed by the first track across the area between the first track and the second track along the axial direction of the chamber to at least a portion of the area enclosed by the second track.

[0030] According to another specific embodiment of the present application, the first track and the second track are arc-shaped tracks, the first track and the second track are oppositely arranged along the radial direction of the chamber, and the region surrounded by the first track and the second track is used for accommodating the smoking segment.

[0031] Alternatively, the first track and the second track are spiral tracks, the first track and the second track are nested with each other to form a double helix structure, and the internal space of the double helix structure is used for accommodating the smoking segment.

[0032] According to another specific embodiment of the present application, the first track and the second track are staggered on the side wall of the chamber, so that the first track and the second track form an interdigital structure.

[0033] According to another specific embodiment of the present application, the heating assembly further comprises an inner heating element, the first track is arranged on the side wall of the chamber, and the second track is arranged on the surface of the inner heating element; when the aerosol generating article is inserted into the chamber, the inner heating element is located inside the smoking segment, and the first track surrounds the smoking segment.

[0034] According to another specific embodiment of the present application, when the conductive heating track is electrically connected to the heating track, the first track and the second track are connected in parallel.

[0035] In a second aspect, embodiments of the present application disclose a heating assembly control method for controlling a heating assembly to heat an aerosol generating article or detect the capacitance of a smoking segment of the aerosol generating article, the heating assembly being the heating assembly of any one of the embodiments of the first aspect, and the heating assembly control method comprising:

[0036] controlling the conductive heating track to access a capacitance detection circuit to detect the current capacitance value of the region in the chamber corresponding to the conductive heating track;

[0037] determining whether there is an aerosol generating article in the chamber according to the current capacitance value, and if there is an aerosol generating article in the chamber, switching the conductive heating track to be electrically connected to the heating circuit to control the conductive heating track to heat the smoking segment of the aerosol generating article, otherwise maintaining the conductive heating track to be electrically connected to the capacitance detection circuit to control the conductive heating track to detect the current capacitance value at a preset frequency.

[0038] By using the above technical scheme, through the above heating assembly, high heating efficiency can be ensured, and whether an aerosol generating article is inserted into the chamber can be determined through capacitance detection, and the heating mode can be adjusted by detecting the capacitance of the smoking segment, so that more efficient heating is achieved.

[0039] According to another specific embodiment of the present application, if there is an aerosol generating article in the chamber, the conductive heating track is switched to be electrically connected to the heating circuit to control the conductive heating track to heat the smoking segment of the aerosol generating article, specifically comprising:

[0040] If the aerosol generating article exists in the chamber, the type of the aerosol generating article is determined according to the current capacitance value;

[0041] A corresponding preset heating curve is determined according to the type of the aerosol generating article.

[0042] The conductive heating track heats the aerosol generating article according to the preset heating curve.

[0043] According to another specific embodiment of the present application, it further comprises:

[0044] The conductive heating track heats the aerosol generating article by pulse width modulation, and the heating process comprises a plurality of heating periods and a plurality of intermittent periods which are alternated in time.

[0045] In the heating period, the conductive heating track is electrically connected with the heating circuit, and the conductive heating track heats the aerosol generating article; in the intermittent period, the conductive heating track is switched to be electrically connected with the capacitance detection circuit, and the conductive heating track detects the capacitance of the smoking segment.

[0046] According to another specific embodiment of the present application, the conductive heating track heats the smoking segment of the aerosol generating article, specifically comprising:

[0047] The aerosol generating article is heated at a predetermined power, and the real-time capacitance value of the corresponding smoking segment is detected by the conductive heating track multiple times within a predetermined time to determine the descending rate of the real-time capacitance value.

[0048] It is judged whether the descending rate is within a preset normal range; if yes, the conductive heating track continues to heat the aerosol generating article at the predetermined power; if no, when the descending rate is lower than the lower limit value of the preset normal range, the conductive heating track heats the aerosol generating article at a power higher than the predetermined power, and when the descending rate is higher than the upper limit value of the preset normal range, the conductive heating track heats the aerosol generating article at a power lower than the predetermined power.

[0049] According to another specific embodiment of the present application, it further comprises:

[0050] During the heating process, the capacitance of the smoking segment is detected by the conductive heating track multiple times, and when it is detected that the capacitance of the smoking segment is not within a preset smokeable range, the heating of the aerosol generating article is stopped.

[0051] According to another specific embodiment of the present application, it further comprises:

[0052] The aerosol generating article is heated at a predetermined power, and during the heating process, the capacitance values of a plurality of different smoking areas in the smoking segment are detected multiple times.

[0053] The heating power of each conductive track corresponding to each smoking area is adjusted according to the corresponding capacitance value of each smoking area detected.

[0054] In a third aspect, embodiments of the present application disclose a heating assembly control device for controlling a heating assembly to heat an aerosol generating article or detecting a capacitance of a smoking section of the aerosol generating article, the heating assembly being the heating assembly in any of the embodiments of the first aspect, the heating assembly control device comprising:

[0055] a capacitance detection module configured to control the electrically conductive heating track to access the capacitance detection circuit to detect a current capacitance value of an area in the chamber corresponding to the electrically conductive heating track;

[0056] a circuit control module configured to determine, according to the current capacitance value, whether the aerosol generating article exists in the chamber, and if the aerosol generating article exists in the chamber, switch the electrically conductive heating track to be electrically connected to the heating circuit to control the electrically conductive heating track to heat the smoking section of the aerosol generating article, or maintain the electrically conductive heating track to be electrically connected to the capacitance detection circuit to control the electrically conductive heating track to detect the current capacitance value at a preset frequency.

[0057] With the above technical solution, by using the above heating assembly, the aerosol generating article can be determined to be inserted into the chamber by capacitance detection under the condition of ensuring high heating efficiency, and the heating mode can be adjusted by detecting the capacitance of the smoking section, thereby achieving more efficient heating.

[0058] In a fourth aspect, embodiments of the present application disclose an electronic device, the electronic device comprising a processor and a memory, the memory storing at least one instruction, the at least one instruction being executed by the processor to implement the heating assembly control method in any of the embodiments of the second aspect.

[0059] With the above technical solution, by using the above heating assembly, the aerosol generating article can be determined to be inserted into the chamber by capacitance detection under the condition of ensuring high heating efficiency, and the heating mode can be adjusted by detecting the capacitance of the smoking section, thereby achieving more efficient heating.

[0060] In a fifth aspect, embodiments of the present application disclose a computer readable storage medium, the computer readable storage medium storing at least one instruction, the at least one instruction being executed to implement the heating assembly control method in any of the embodiments of the second aspect.

[0061] With the above technical solution, by using the above heating assembly, the aerosol generating article can be determined to be inserted into the chamber by capacitance detection under the condition of ensuring high heating efficiency, and the heating mode can be adjusted by detecting the capacitance of the smoking section, thereby achieving more efficient heating.

[0062] In a sixth aspect, embodiments of the present application disclose an aerosol generating device, comprising: the heating assembly in any of the embodiments of the first aspect; or, the heating assembly control device in the embodiment of the third aspect.

[0063] With the above technical solution, in the aerosol generating device of the present application, the heating assembly is used, the circuit switching switch is arranged, the electrically conductive heating track can be switched between the capacitance detection function and the heating function, the space of the heating assembly can be fully utilized, the capacitance detection can be performed under the condition of ensuring high heating efficiency, the electrically conductive heating track is corresponded to the smoking segment of the aerosol generating article, and the accurate detection of the capacitance of the smoking segment is also helped. Further, with the heating assembly, the aerosol generating article can be determined whether to be inserted into the chamber through the capacitance detection under the condition of ensuring high heating efficiency, and the heating mode can be adjusted through the detection of the capacitance of the smoking segment, so that more efficient heating is realized. BRIEF DESCRIPTION OF DRAWINGS

[0064] Figure 1 A schematic diagram of electric field line distribution of a parallel-plate capacitor is shown;

[0065] Figure 2 A schematic diagram of the structure of a flat-plate capacitive sensor electrode plate is shown;

[0066] Figure 3 A schematic diagram of the structure of an arc-shaped capacitive sensor electrode plate is shown;

[0067] Figure 4 A schematic diagram of the structure of a spiral capacitive sensor electrode plate is shown;

[0068] Figure 5 A schematic diagram of the structure of a circular ring capacitive sensor electrode plate is shown;

[0069] Figure 6 A schematic diagram of the structure of an interdigital capacitive sensor electrode plate is shown;

[0070] Figure 7 A schematic diagram of the structure of a heating assembly in an embodiment of the present application is shown;

[0071] Figure 8 A schematic diagram of the structure of a heating assembly in another embodiment of the present application is shown;

[0072] Figure 9 A schematic diagram of the structure of a heating assembly in still another embodiment of the present application is shown;

[0073] Figure 10 A schematic diagram of the structure of a heating assembly in still another embodiment of the present application is shown;

[0074] Figure 11 A schematic diagram of the structure of a heating assembly in still another optional embodiment of the present application is shown;

[0075] Figure 12 Structure diagram of the heating assembly in another optional embodiment of the present application is shown.

[0076] Figure 13 Flow diagram of the heating assembly control method in an embodiment of the present application is shown. Figure 1 ;

[0077] Figure 14 Flow diagram of the heating assembly control method in an embodiment of the present application is shown. Figure 2 ;

[0078] Figure 15 Flow diagram of the heating assembly control method in an embodiment of the present application is shown. Figure 3 ;

[0079] Figure 16 Flow diagram of the heating assembly control method in an embodiment of the present application is shown. Figure 4 ;

[0080] Figure 17 Flow diagram of the heating assembly control method in an embodiment of the present application is shown. Figure 5 ;

[0081] Figure 18 Flow diagram of the heating assembly control method in an embodiment of the present application is shown. Figure 6 ;

[0082] Figure 19 Structure diagram of the heating assembly control device in an embodiment of the present application is shown.

[0083] Figure 20 Structure diagram of the electronic device in an embodiment of the present application is shown.

[0084] Symbol explanation: first metal electrode plate 101; second metal electrode plate 102; object to be measured 103; flat plate capacitance sensor 01; first flat plate electrode plate 011; second flat plate electrode plate 012; arc-shaped capacitance sensor 02; first arc-shaped electrode plate 021; second arc-shaped electrode plate 022; spiral capacitance sensor 03; first spiral electrode plate 031; second spiral electrode plate 032; circular ring capacitance sensor 04; first circular ring electrode plate 041; second circular ring electrode plate 042; interdigital capacitance sensor 05; first interdigital electrode 051; second interdigital electrode 052; first annular track 201; second annular track 202; first arc-shaped track 301; second arc-shaped track 302; first spiral track 401; second spiral track 402; first interdigital track 501; second interdigital track 502; first tubular track 602; second heating needle track 601; upper annular track 901; middle annular track 902; lower annular track 903. DETAILED DESCRIPTION

[0085] The following detailed description together with the accompanying drawings provides a sufficient understanding of the application to construct and use an embodiment of the application. The description of the embodiments is not intended to limit the scope of the application. Instead, the described embodiments are intended to explain the principles of the application. Other embodiments can be apparent to those skilled in the art from the description of the embodiments. In the description of the embodiments, same reference numbers can be used to describe the same elements throughout different drawings. In the description of the embodiments, the terms "first", "second", etc. are used to describe various components, but do not limit the components relative to each other. For instance, a first component can be termed a second component, and similarly, a second component can be called a first component without departing from the scope of the application.

[0086] It should be noted that in this specification, similar reference numbers and letters in the drawings represent similar items, and thus, once an item is defined in one drawing, it is not necessary to further define and explain it in subsequent drawings.

[0087] The terms "first", "second", etc. are used to distinguish between similar items, and should not be interpreted as indicating or implying relative importance.

[0088] The term "aerosol-generating article" includes a material that can provide a volatile component when heated, and can include any tobacco-containing material, for example, can include one or more of tobacco, tobacco derivatives, expanded tobacco, reconstituted tobacco, or a tobacco substitute. The "aerosol-generating article" can also include other non-tobacco products, which can or can not contain nicotine.

[0089] To make the objects, technical solutions and advantages of the present application clearer, the embodiments of the present application will be further described in detail below with reference to the drawings.

[0090] In a first aspect, embodiments of the present application disclose a heating assembly, comprising a chamber, a conductive heating track, a capacitance detection circuit, a heating circuit and a circuit switching switch. The chamber is configured to accommodate an aerosol generating article. The conductive heating track is arranged in the chamber and corresponds to a smoking segment of the aerosol generating article when the aerosol generating article is inserted into the chamber. The conductive heating track comprises a first track and a second track, the second track being arranged opposite to the first track along a first direction, the first direction being an axial direction or a radial direction of the heating assembly. The capacitance detection circuit is electrically connected to the conductive heating track, the first track and the second track forming an electrode pair, and the capacitance detection circuit is configured to detect a capacitance of the smoking segment corresponding to the conductive heating track. The heating circuit is electrically connected to the conductive heating track and configured to control the conductive heating track to heat the aerosol generating article. One end of the circuit switching switch is electrically connected to the conductive heating track, and the other end of the circuit switching switch is switchable between the capacitance detection circuit and the heating circuit to electrically connect the conductive heating track to the capacitance detection circuit or the heating circuit.

[0091] With the above technical solution, in the heating assembly, the first track and the second track can not only serve as a heating element to heat the smoking segment of the aerosol generating article, but also form an electrode pair to detect the capacitance of the smoking segment in cooperation with the capacitance detection circuit, thereby realizing a highly integrated design of the heating function and the capacitance detection function, effectively reducing the number of components of the heating assembly, simplifying the overall structure, and realizing a compact overall layout without occupying the heating space, thereby ensuring high heating efficiency. At the same time, the same hardware is used to realize the functions of heating and sensing detection, and the functions can be reused, which helps to reduce the cost. The circuit switching switch can flexibly and reliably switch the conductive heating track between the capacitance detection circuit and the heating circuit, so that the heating can be started after accurately judging whether the aerosol generating article exists in the chamber through the capacitance detection, thereby fundamentally avoiding the invalid heating phenomenon when there is no article, significantly improving the use safety and energy utilization rate. On the other hand, the capacitance of the smoking segment can be detected during the heating process, and the heating mode of the smoking segment can be controlled based on the detected capacitance of the smoking segment, thereby helping to improve the generation of aerosol and improving the user experience.

[0092] Further, in the above embodiment, the circuit switching switch is a multi-way switching switch, the first track includes a first lead wire, the second track includes a second lead wire, the first lead wire and the second lead wire are electrically connected to a first end of the multi-way switching switch, and a second end of the multi-way switching switch is electrically connected to the capacitance detection circuit or the heating circuit. The capacitance detection circuit includes an excitation end and a detection end. The first lead wire and the second lead wire can be synchronously electrically connected to the capacitance detection circuit through the multi-way switching switch, or at least one of the first lead wire and the second lead wire can be electrically connected to the heating circuit through the multi-way switching switch. When the first lead wire and the second lead wire are electrically connected to the capacitance detection circuit at the same time, the first lead wire is electrically connected to the excitation end, and the second lead wire is electrically connected to the detection end.

[0093] In this way, the switching between the heating function of the heating assembly and the capacitance detection function can be realized through the circuit switching switch. Specifically, the first lead wire and the second lead wire can be switched to be electrically connected to the capacitance detection circuit at the same time, at which time the conductive heating track is electrically connected to the capacitance detection circuit, and the first track and the second track form an electrode pair, so that capacitance detection can be performed, which can be detecting the capacitance in the chamber to determine whether there is an aerosol generating article in the chamber, or detecting the capacitance of the smoking segment after inserting the aerosol generating article into the chamber. At least one of the first lead wire and the second lead wire can also be switched to be electrically connected to the heating circuit, at which time the conductive heating track is not in communication with the capacitance detection circuit, and the conductive heating track does not perform the capacitance detection function and only performs the heating function. Specifically, when the conductive heating track performs the heating function, only the first lead wire can be electrically connected to the heating circuit, so that the first track can heat the aerosol generating article alone, and the second track does not perform heating; or only the second lead wire can be electrically connected to the heating circuit, so that the second track can heat the aerosol generating article alone, and the first track does not perform heating; or the first lead wire and the second lead wire can both be electrically connected to the heating circuit, at which time the first track and the second track both perform heating, and the first track and the second track can heat different regions of the smoking segment, which helps to control the smoking degree of different regions of the smoking segment, so as to improve the user experience.

[0094] Further, in the present embodiment, the first track further includes a fourth lead wire, and the second track further includes a fifth lead wire, and the fourth lead wire and the fifth lead wire are respectively grounded.

[0095] Further, in the above embodiment, with reference to Figure 7 , the first track and the second track are annular tracks, and the first track and the second track can be arranged on the inner side wall or the outer side wall of the chamber. The first track is denoted as a first annular track 201, and the second track is denoted as a second annular track 202. Figure 7A composite heating element is shown in an upper-lower annular layout. The heating element can be made of a ceramic substrate or a metal substrate, and has two annular heating tracks on the surface of the substrate, which are independent of each other and symmetrically distributed in an upper-lower manner (i.e., a first annular track 201 and a second annular track 202). The first track and the second track are oppositely arranged along the axial direction of the chamber (e.g., the X direction in Figure 7 The chamber includes a smoking segment accommodating area for accommodating a smoking segment. The smoking segment accommodating area extends from at least a portion of the area surrounded by the first track, through the area between the first track and the second track, and to at least a portion of the area surrounded by the second track along the axial direction of the chamber.

[0096] The first annular track 201 is provided with lead wires L1 and L2 at the two ends thereof, and the second annular track 202 is provided with lead wires L3 and L4 at the two ends thereof. When the conductive heating track is electrically connected to the heating circuit, an external power source can apply a voltage to L1 and L2 through the heating circuit, and an electric current flows through the first annular track 201 to independently heat the first annular track 201. Similarly, energizing L3 and L4 can cause the second annular track 202 to independently heat. Further, the two tracks described above can be simultaneously energized and heated to work cooperatively. Through the above arrangement, segmented heating of the smoking segment can be achieved. Further, the switching circuit switch (e.g., controlled by a control unit MCU in an external control circuit) can disconnect the heating circuit and instead connect the lead wire (e.g., L1) of the first annular track 201 and the lead wire (e.g., L3) of the second annular track 202 to a capacitance detection circuit. For example, L1 can be electrically connected to the excitation end of the capacitance detection circuit, and L3 can be electrically connected to the detection end of the capacitance detection circuit. The capacitance detection circuit can be, for example, a capacitance detection chip. At this time, the two annular heating tracks form an annular capacitance sensor arranged in an upper-lower manner. The detection electric field of the annular capacitance sensor can effectively cover the cross-sectional area of the aerosol generating article in the chamber, so that the overall dielectric constant change thereof can be detected.

[0097] Further, in another embodiment, referring to Figure 8 , the first track and the second track are arc-shaped tracks. The first track and the second track are oppositely arranged along the radial direction of the chamber (e.g., Figure 8Y direction in the figure) are oppositely arranged, and the area surrounded by the first track and the second track is used to accommodate the smoking segment. The first track and the second track can be arranged on the inner side wall or the outer side wall of the chamber. Among them, the first track is referred to as the first arc-shaped track 301, and the second track is referred to as the second arc-shaped track 302. The first arc-shaped track 301 and the second arc-shaped track 302 are arranged in a left-right symmetrical arc shape. When the conductive heating track is electrically connected with the capacitance detection circuit, the first arc-shaped track 301 and the second arc-shaped track 302 jointly form a left-right surrounding arc-shaped capacitance sensor. The first arc-shaped track 301 and the second arc-shaped track 302 can also have two lead wires respectively, and support independent heating, cooperative heating and capacitance detection. The specific principle is the same as that of the embodiment shown in the figure, and will not be repeated here. Figure 7 The specific principle is the same as that of the embodiment shown in the figure, and will not be repeated here.

[0098] Further, in another embodiment, referring to Figure 9 , the first track and the second track are spiral tracks, and the first track and the second track are nested with each other to form a double helix structure. The internal space of the double helix structure is used to accommodate the smoking segment. The first track and the second track can be arranged on the inner side wall or the outer side wall of the chamber. Among them, the first track is referred to as the first spiral track 401, and the second track is referred to as the second spiral track 402. In the radial cross section of the chamber, the first spiral track 401 and the second spiral track 402 are oppositely arranged. In this embodiment, the first spiral track 401 and the second spiral track 402 jointly form a spiral capacitance sensor. Each track has two lead wires respectively, and supports independent heating, cooperative heating and capacitance detection. The specific principle is the same as that of the embodiment shown in the figure, and will not be repeated here. By arranging the first track and the second track as spiral tracks, it is helpful to enhance the uniformity of the detection electric field during capacitance detection, the detection error is smaller, and more accurate capacitance detection of the chamber or the smoking segment is realized. Figure 7 The specific principle is the same as that of the embodiment shown in the figure, and will not be repeated here. By arranging the first track and the second track as spiral tracks, it is helpful to enhance the uniformity of the detection electric field during capacitance detection, the detection error is smaller, and more accurate capacitance detection of the chamber or the smoking segment is realized.

[0099] Further, in another embodiment, referring to Figure 10 , the first track and the second track are staggered on the side wall of the chamber, so that the first track and the second track form an interdigital structure. The first track and the second track can be arranged on the inner side wall or the outer side wall of the chamber. Among them, the first track is referred to as the first interdigital track 501, and the second interdigital track 502. The first interdigital track 501 includes an axial direction (for example Figure 10The first interdigital track 501 further comprises a plurality of first extension portions 5011 extending along the axial direction X, the plurality of first extension portions 5011 are spaced apart along the circumferential direction of the chamber, and a first gap is formed between two adjacent first extension portions 5011. The first interdigital track 501 further comprises a plurality of first connecting portions 5012, the first connecting portions 5012 are arranged at the bottom ends of the first extension portions 5011 and connect two adjacent first extension portions 5011. The second interdigital track 502 comprises a plurality of second extension portions 5021 extending along the axial direction X, the plurality of second extension portions 5021 are spaced apart along the circumferential direction of the chamber, and a second gap is formed between two adjacent second extension portions 5021. The second interdigital track 502 further comprises a plurality of second connecting portions 5022, the second connecting portions 5022 are arranged at the top ends of the second extension portions 5021 and connect two adjacent second extension portions 5021. The first gap can accommodate the second extension portions 5021, the second gap can accommodate the first extension portions 5011, the first extension portions 5011 are arranged opposite to the second connecting portions 5022 along the axial direction X, and the second extension portions 5021 are arranged opposite to the first connecting portions 5012 along the axial direction X. In this embodiment, the first interdigital track 501 and the second interdigital track 502 jointly form the interdigital electrode capacitive sensor, each track also has two lead wires, and supports independent heating, cooperative heating and capacitive detection. The specific principle is the same as that of the embodiment shown in FIG. 6, and will not be described here. Figure 7

[0100] Further, the first interdigital track 501 and the second interdigital track 502 have the same shape, so that when the smoking segments corresponding to different tracks are heated separately by the first interdigital track 501 and the second interdigital track 502, the areas of the smoking segments corresponding to different tracks can be more uniform, which helps to balance the heat distribution when heating, and helps to ensure uniform electric field distribution when capacitive detection is performed, thereby realizing more accurate capacitive detection.

[0101] Further, in another embodiment, referring to FIG. 7, the first interdigital track 501 and the second interdigital track 502 are arranged in a staggered manner along the axial direction X. Figure 11 ​, the inner heating element can be a heating needle for example, the first track (i.e. the first tubular track 602) is arranged on the side wall of the chamber (which can be the inner side wall or the outer side wall), the second track is arranged on the surface of the inner heating element (i.e. the second heating needle track 601), the first track can be in the form of a cylindrical metal electrode plate for example; when the aerosol generating article is inserted into the chamber, the inner heating element is located inside the smoking segment, and the first track surrounds the smoking segment. In this way, when heating, the first tubular track 602 and the second heating needle track 601 can heat from the inner and outer sides of the smoking segment respectively, improving the atomization efficiency, and when battery detection, a cylindrical electrode capacitor sensor can be formed to realize the capacitive detection of the smoking segment. In the embodiment, the first tubular track 602 and the second heating needle track 601 also each have two leads, and also support independent heating, cooperative heating and capacitive detection, and the specific principles are the same as those of the embodiment shown in Figure 7 The above-described embodiments.

[0102] Further, in the above-described embodiments, when the conductive heating track is electrically connected to the heating track, the first track and the second track are connected in parallel. In this way, the first track and the second track can be controlled separately, and different areas of the smoking segment can be heated separately. More specifically, when the first track is heated, the second track can be heated or not heated; when the second track is heated, the first track can be heated or not heated.

[0103] Further, in the above-described embodiments, the detection end includes a first detection end and a second detection end, and the conductive heating track further includes a third track, the third track being arranged opposite to the first track along the first direction, and correspondingly, the third track being arranged opposite to the second track along the first direction. The third track has a third lead, and the third lead is electrically connected to the first end of the multi-way switch. When the conductive heating track is electrically connected to the capacitive detection circuit, the third lead is electrically connected to the excitation end, the first lead is electrically connected to the first detection end, and the second lead is electrically connected to the second detection end.

[0104] Reference Figure 12 , the following will be described with reference to the annular heating track shown in Figure 12 The above-described embodiments (when the conductive heating track is in other shapes, the principles are the same as those of the embodiment shown in Figure 12 The above-described embodiments). In the embodiment shown in Figure 12 The first track is referred to as the upper annular track 901, the second track is referred to as the lower annular track 903, and the third track is referred to as the middle annular track 902. The upper annular track 901 has leads L1 and L2, the lower annular track 903 has leads L5 and L6, and the middle annular track 902 has leads L3 and L4. The above-described three tracks can be electrically connected to the capacitive detection circuit or the heating circuit through the respective leads.

[0105] In this embodiment, the above structure allows for extremely precise and independent temperature control of the upper, middle, and lower sections of the smoke-generating section of the aerosol-generating article. For example, the middle section can be heated separately to initiate aerosol generation, and then the upper and lower sections can be activated as needed.

[0106] In capacitance detection mode, the above structure allows for both one-to-one and one-to-many capacitance detection (e.g., different detection modes can be achieved by switching the control circuit via the MCU). In one-to-one mode, with... Figure 7 The illustrated embodiment is similar. For example, the upper annular track 901 is used as the excitation electrode, and the middle annular track 902 is used as the induction electrode, forming a capacitor unit C1 to detect the capacitance of the upper and middle smoke-generating sections. The upper annular track 901, the middle annular track 902, and the lower annular track 903 can be paired to form electrode pairs, enabling capacitance detection of different smoke-generating sections. In a one-to-many mode, one of the upper annular track 901, the middle annular track 902, and the lower annular track 903 can serve as a common excitation electrode, while the other two serve as separate induction electrodes, thus forming two capacitor units to detect the capacitance of different regions respectively.

[0107] Furthermore, in the above embodiment, the third track is located between the first and second tracks in the first direction. Continuing... Figure 12 Taking the illustrated embodiment as an example, the first direction is axial X, and the third track corresponds to the middle annular track 902. In one-to-many mode capacitance detection, the middle annular track 902 can be used as a common excitation electrode, while the upper annular track 901 and the lower annular track 903 are both used as independent sensing electrodes. With this configuration, a capacitance unit C2 is formed between the common excitation electrode (i.e., the middle annular track 902) and the upper sensing electrode (i.e., the upper annular track 901), and a capacitance unit C3 is formed between the common excitation electrode (i.e., the middle annular track 902) and the lower sensing electrode (i.e., the lower annular track 903). The control unit MCU can simultaneously read the capacitance values ​​of C2 and C3 to obtain the capacitance of the smoke-generating sections in different areas, which helps to control the heating methods of different tracks separately in order to generate aerosols that better meet user needs and improve the user experience.

[0108] Further, by comparing the values of C2 and C3 and their change trends, the control system can determine the distribution of aerosol in the axial direction X (i.e. the length direction) of the aerosol generating article. For example, if it is detected that the value of C2 is much smaller than the value of C3, it indicates that the aerosol content in the upper part of the aerosol generating article has been significantly reduced (may have been smoked out), while the lower part is still relatively sufficient. Based on this information, the control system can intelligently turn off or reduce the heating power of the upper annular track 901, while maintaining or increasing the power of the lower annular track 903, thereby achieving unprecedented zoned heating on demand, avoiding energy waste and local overheating, and maximizing smoking efficiency and user experience.

[0109] Illustratively, when the ratio of C2 to C3 is lower than the lower limit value of the preset normal consumption capacitance ratio range, it can be considered that the value of C2 is much smaller than the value of C3. When the ratio of C2 to C3 is higher than the upper limit value of the preset normal consumption capacitance ratio range, it can be considered that the value of C2 is much larger than the value of C3, at which time the heating power of the lower annular track 903 can be turned off or reduced, while the power of the upper annular track 901 is maintained or increased. The preset normal consumption capacitance ratio range represents the capacitance ratio range corresponding to uniform consumption distribution in the upper part of the smoking segment and the lower part of the smoking segment, for example, the lower limit value of the preset normal consumption capacitance ratio range can be 0.2-0.4, and the upper limit value of the preset normal consumption capacitance ratio range can be 2.5-5.

[0110] Further, in the above-described conductive heating track, the number of tracks can be more than three, and when performing capacitance detection, one of the tracks can be used as a common excitation plate, and the remaining multiple tracks can be used as independent sensing plates. In this way, an independent capacitance sensing unit is formed between the common excitation plate and each independent sensing plate, thereby achieving synchronous and multi-point detection of multiple positions in the axial or radial direction of the cigarette, and obtaining spatial distribution information of the aerosol content. For example, it can be determined which segment of the cigarette is wet and which segment has been smoked out, thereby providing unprecedented detailed data basis for zoned heating control, greatly improving the fineness of control and consistency of user experience.

[0111] In the above embodiments, by connecting the conductive heating tracks of the heating assembly to the heating circuit, the cigarettes can be independently or cooperatively heated in segments; by connecting the conductive heating tracks of the heating assembly to the capacitance detection circuit, a capacitance sensor of various configurations (such as one-to-one or one-to-many) can be formed, which can be used to detect the insertion state, type, and spatial distribution and real-time changes of aerosol content of the cigarettes, to realize multi-dimensional monitoring of the state of the cigarettes, and can also effectively identify foreign objects in the chamber, and can also help to realize adaptive zoned closed-loop temperature control. Through the above hardware multiplexing and function integration, without adding additional elements, the integration of heating and sensing can be realized, which provides a hardware foundation for the closed-loop intelligent temperature control of the aerosol generating device to realize zoned sensing and zoned heating, and can realize the precise closed-loop control of "where heating is needed, sensing is needed; where sensing is needed, compensation is needed", which upgrades the segmented heating from simple time sequence control to intelligent control linked with physical state, greatly improving the consistency, safety, and reliability of the smoking experience.

[0112] In a second aspect, embodiments of the present application disclose a heating assembly control method for controlling a heating assembly to heat an aerosol generating article or detect the capacitance of a smoking section of the aerosol generating article. The heating assembly is the heating assembly of any one of the embodiments of the first aspect. With reference to Figure 13 , the heating assembly control method comprises:

[0113] S1: controlling the conductive heating tracks to be connected to the capacitance detection circuit to detect the current capacitance value of the region in the chamber corresponding to the conductive heating tracks.

[0114] Specifically, the control system of the above heating assembly can include a main controller (MCU), a heating circuit (specifically a heating driving circuit, which can support multiple independent outputs, and can apply a driving signal to each of the multiple tracks in the conductive heating tracks to control the heating of different tracks), a capacitance detection circuit (specifically, for example, a capacitance detection chip, which can support multiple channel inputs, and can apply a detection signal to each of the multiple tracks in the conductive heating tracks to detect the capacitance), and a circuit switching switch (for example, a multi-channel switching switch, which increases in complexity with the number of tracks, and is used to realize flexible circuit switching). Exemplarily, the MCU controls the circuit switching switch to switch the circuit, and connects the conductive heating tracks to the capacitance detection circuit. The control system can cyclically detect the capacitance value under different electrode plate configurations (for example, one-to-one and one-to-many) at a certain time sequence, to obtain the current capacitance value. Figure 12 The embodiment shown can first use one-to-one mode, and then use one-to-many mode.

[0115] S2: judging whether the aerosol generating article exists in the chamber according to the current capacitance value, if the aerosol generating article exists in the chamber, performing S21: switching the conductive heating track to be electrically connected with the heating circuit, and controlling the conductive heating track to heat the smoking segment of the aerosol generating article, otherwise performing S22: maintaining the conductive heating track to be electrically connected with the capacitance detection circuit, and controlling the conductive heating track to detect the current capacitance value at the preset frequency.

[0116] By adopting the technical scheme, the heating assembly can ensure high heating efficiency, and can also determine whether the aerosol generating article is inserted into the chamber by capacitance detection, and adjust the heating mode by detecting the capacitance of the smoking segment, so that more efficient heating is achieved.

[0117] Further, in the above embodiments, with reference to Figure 14 In the step S21, if the aerosol generating article exists in the chamber, the conductive heating track is switched to be electrically connected with the heating circuit, and the conductive heating track is controlled to heat the smoking segment of the aerosol generating article, which specifically includes:

[0118] S211: if the aerosol generating article exists in the chamber, judging the type of the aerosol generating article according to the current capacitance value.

[0119] S212: determining the corresponding preset heating curve according to the type of the aerosol generating article.

[0120] S213: controlling the conductive heating track to heat the aerosol generating article according to the preset heating curve.

[0121] When it is determined that the cigarette is inserted into the chamber and is a valid cigarette, the MCU can calculate the total and / or partitioned aerosol content according to the detected capacitance value. Subsequently, the MCU queries the pre-stored optimal heating strategy according to the cigarette type and the aerosol content, assigns the initial power to each heating track, and starts heating.

[0122] More specifically, by detecting the current capacitance value, it can not only be determined whether the aerosol generating article is inserted, but also the brand or type of the aerosol generating article can be preliminarily judged by matching the current capacitance value with the pre-stored database in the control system (the diameters, densities and formulations of cigarettes of different brands are slightly different, which will cause differences in the characteristic values of the capacitance, so the type of the cigarette can be identified), so that the corresponding preset heating curve can be selected according to the type of the aerosol generating article, so that the aerosol generating article can be heated in a more suitable way, so that the aerosol with better taste can be generated, which helps to improve the user experience.

[0123] Further, in the above embodiments, with reference to Figure 15 The heating assembly control method further includes:

[0124] S3: controlling the conductive heating track to heat the aerosol generating article by pulse width modulation, the heating process comprising a plurality of heating periods and a plurality of intermittent periods alternately in time.

[0125] In the heating period, the conductive heating track is electrically connected with the heating circuit, and the conductive heating track heats the aerosol generating article; in the intermittent period, the conductive heating track is switched to be electrically connected with the capacitance detection circuit, and the conductive heating track detects the capacitance of the smoking segment.

[0126] Specifically, in the embodiment, the control manner of the heating assembly is PWM, by adjusting the duty cycle, the power provided to the heating assembly can be changed, and then the heating power of the heating assembly is adjusted, so as to adjust the heating temperature of the heating assembly. In the PWM control manner, the heating process comprises a plurality of heating periods and a plurality of intermittent periods alternately in time. The circuit switching switch can frequently switch the circuit connection mode of the conductive heating track in the whole heating process, by controlling the conductive heating track to heat in the heating period and to detect the capacitance in the intermittent period, the heating gap can be fully utilized, the MCU can continuously detect the capacitance (especially one-to-many capacitance detection), so as to obtain the consumption of the smoking material in the smoking segment, and the spatial distribution change of the aerosol content can be monitored in real time, so as to adjust the duty cycle and control the heating power, so as to generate the aerosol more in line with the user's demand.

[0127] Further, in each of the above embodiments, with reference to Figure 16 In the step S21, the conductive heating track heats the smoking segment of the aerosol generating article, specifically comprising:

[0128] S214: heating the aerosol generating article at a predetermined power, and detecting the real-time capacitance value of the corresponding smoking segment through the conductive heating track for multiple times within a predetermined time, to determine the descending rate of the real-time capacitance value.

[0129] S215: determining whether the descending rate is within a preset normal range; if yes, performing S216: controlling the conductive heating track to continue heating the aerosol generating article at the predetermined power; if no, performing S217: when the descending rate is lower than the lower limit value of the preset normal range, controlling the conductive heating track to heat the aerosol generating article at a power higher than the predetermined power, and when the descending rate is higher than the upper limit value of the preset normal range, controlling the conductive heating track to heat the aerosol generating article at a power lower than the predetermined power.

[0130] By the above manner, if the overall capacitance value of the smoking segment is detected to decrease rapidly (i.e. the decrease rate is higher than the upper limit value of the preset normal range) in multiple detection processes, it indicates that the aerosol amount generated is relatively large, and thus the heating power of different tracks in the conductive heating track can be comprehensively reduced to reduce the subsequent generated aerosol amount, so as to maintain the stable output of the total aerosol amount. If the decrease speed of the overall capacitance value of the smoking segment is detected to be too slow (i.e. the decrease rate is lower than the lower limit value of the preset normal range), it indicates that the aerosol amount generated is relatively small, and continuing to heat at the original power may result in that the subsequent generated aerosol is still small, and thus the heating power can be appropriately increased to increase the aerosol release amount, so as to maintain the stable output of the total aerosol amount. The overall capacitance value of the smoking segment can be detected by the capacitance sensor composed of the first track and the second track, at this time, one capacitance value can be detected, which is the overall capacitance value of the smoking segment; or the overall capacitance value of the smoking segment can also be detected by multiple capacitance sensors composed of at least three tracks (i.e. the conductive heating track includes at least three tracks, corresponding to the first track, the second track and the third track), at this time, multiple capacitance values can be detected, and the overall capacitance value of the smoking segment can be determined according to the multiple capacitance values, for example, if the multiple capacitance values all decrease rapidly, it is considered that the overall capacitance value of the smoking segment decreases rapidly. Figure 12 The embodiments shown and similar embodiments) are further composed of the first track, the second track and the third track, and the heating circuit is connected to the first track, the second track and the third track, and the heating circuit can independently control the first track, the second track and the third track.

[0131] Further, in the above embodiments, the reference Figure 18 The above heating assembly control method further includes:

[0132] S5: heating the aerosol generating article at a predetermined power, and detecting the capacitance values of multiple different smoking areas in the smoking segment multiple times during the heating process;

[0133] S6: adjusting the heating power of each conductive track corresponding to each smoking area according to the detected capacitance value corresponding to each smoking area.

[0134] Specifically, the heating circuit can independently control different tracks in the conductive heating track, and different tracks can independently heat different areas of the smoking segment. According to the detected capacitance value corresponding to each smoking area, the on-off and power size of the heating circuit connected to each track can be independently controlled, so as to realize the zoned heating control of the aerosol generating article. For example, a region with a lower aerosol content can be applied with a higher power, and a region with a higher aerosol content can be applied with a lower power, so as to realize uniform vaporization or targeted compensation of different regions.

[0135] More specifically, the heating circuit can independently control the first track, the second track and the third track, and the first track, the second track and the third track can independently heat different areas of the smoking segment. Figure 12The embodiment shown is an example. If it is found through one-to-many mode capacitive detection that the content of the lower end of the cigarette (corresponding to the detected capacitance C3) decreases slowly and the upper end (corresponding to the detected capacitance C2) decreases quickly (possibly due to heat rise), the power of the upper annular track 901 can be independently increased, and the power of the lower annular track 903 can be fine-tuned or maintained, thereby achieving precise segment compensation heating and ensuring consistency of the entire cigarette smoking experience.

[0136] Further, in each of the above embodiments, with reference to Figure 17 The heating assembly control method further includes:

[0137] S4: During the heating process, the capacitance of the smoking segment is detected multiple times through the conductive heating track. When it is detected that the capacitance of the smoking segment is not within the preset smokeable range, heating of the aerosol generating article is stopped.

[0138] Specifically, the capacitance of the smoking segment can be detected multiple times during the intermittent period in the heating process. When it is detected that the capacitance of the smoking segment is not within the preset smokeable range, it can be considered that the region of the smoking segment has been consumed and heating of the region can be stopped. Further, when the heating assembly is Figure 12 In the heating assembly or similar heating assembly with at least three tracks in the embodiment shown, the capacitance values of multiple different regions of the smoking segment can be detected respectively. When these capacitance values are all not within the preset smokeable range, it is considered that the smoking segment has been completely consumed, i.e., the aerosol generating article has been smoked, and the heating assembly can be controlled to stop heating completely.

[0139] Further, in each of the above embodiments, when the heating power of different regions is controlled based on the detected capacitance value, and when it is judged whether the cigarette is smoked based on the detected capacitance value and the preset smokeable range, a control model can be obtained by pre-calibration. More specifically, a more accurate control model can be obtained by regional calibration, i.e., independent calibration experiments are performed for each capacitance sensing unit (e.g., C2, C3, etc., the number of capacitance sensing units and their respective detection objects can be determined according to the number of tracks actually used in the conductive heating track), and a functional relationship between the capacitance change amount and the corresponding region aerosol content is established. The control model or functional relationship can be pre-solidified and stored in the MCU, so as to subsequently control the heating of the heating assembly based thereon.

[0140] In a third aspect, with reference to Figure 19Embodiments of the present application disclose a heating assembly control device for controlling a heating assembly to heat an aerosol generating article or detect a capacitance of a smoking segment of the aerosol generating article, the heating assembly being the heating assembly in any of the embodiments of the first aspect. The heating assembly control device can also perform the heating assembly control method in any of the embodiments of the second aspect to control the heating assembly. The heating assembly control device comprises a capacitance detection module 11 and a circuit control module 12.

[0141] The capacitance detection module 11 is configured to control the electrically conductive heating track to access the capacitance detection circuit to detect a current capacitance value of the area in the chamber corresponding to the electrically conductive heating track.

[0142] The circuit control module 12 is configured to determine whether the aerosol generating article exists in the chamber according to the current capacitance value, switch the electrically conductive heating track to be electrically connected to the heating circuit if the aerosol generating article exists in the chamber, control the electrically conductive heating track to heat the smoking segment of the aerosol generating article, or maintain the electrically conductive heating track to be electrically connected to the capacitance detection circuit, and control the electrically conductive heating track to detect the current capacitance value at a preset frequency.

[0143] By using the above technical solution, the heating assembly can ensure high heating efficiency, determine whether the aerosol generating article is inserted into the chamber through capacitance detection, and adjust the heating mode by detecting the capacitance of the smoking segment, thereby achieving more efficient heating.

[0144] Further, the capacitance detection module 11 can also be configured to perform the step S214 and the related steps. The circuit control module 12 can also be configured to perform the steps S21, S211, S212, S213, S215, S216, S217, S3, S4, S5, S6 and the related steps.

[0145] In a fourth aspect, referring to Figure 20 Embodiments of the present application disclose an electronic device 2 comprising a processor 22 and a memory 21, and the memory 21 stores at least one instruction, and the at least one instruction is executed by the processor 22 to implement the heating assembly control method in any of the embodiments of the second aspect. The memory 21 may, for example, include a system memory, a fixed non-volatile storage medium, etc. The system memory may, for example, store an operating system, an application program, a boot loader and other programs, etc.

[0146] By using the above technical solution, the heating assembly can ensure high heating efficiency, determine whether the aerosol generating article is inserted into the chamber through capacitance detection, and adjust the heating mode by detecting the capacitance of the smoking segment, thereby achieving more efficient heating.

[0147] In a fifth aspect, the embodiments of the present application disclose a computer readable storage medium, which stores at least one instruction, and the at least one instruction, when executed, implements the heating assembly control method in any one of the embodiments of the second aspect.

[0148] By adopting the above technical solution, through the heating assembly, the aerosol generating article can be determined to be inserted into the cavity through the capacitance detection under the condition of ensuring high heating efficiency, and the heating mode can be adjusted by detecting the capacitance of the smoking section, so that more efficient heating is achieved.

[0149] In a sixth aspect, the embodiments of the present application disclose an aerosol generating device, which comprises: the heating assembly in any one of the embodiments of the first aspect; or the heating assembly control device in the embodiment of the third aspect.

[0150] By adopting the above technical solution, in the aerosol generating device of the present application, the conductive heating track can be switched between the capacitance detection function and the heating function by setting the circuit switching switch, the space of the heating assembly can be fully utilized, the capacitance detection can be performed under the condition of ensuring high heating efficiency, the conductive heating track is corresponded to the smoking section of the aerosol generating article, and the accurate detection of the capacitance of the smoking section is also facilitated. Further, through the heating assembly, the aerosol generating article can be determined to be inserted into the cavity through the capacitance detection under the condition of ensuring high heating efficiency, and the heating mode can be adjusted by detecting the capacitance of the smoking section, so that more efficient heating is achieved.

[0151] Those skilled in the art should understand that the embodiments of the present application can be provided as a method, a system, or a computer program product. Therefore, the present application can adopt a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Moreover, the present application can adopt the form of a computer program product implemented on one or more computer usable non-transitory storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer usable program codes.

[0152] The present application is described with reference to flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each flow and / or block in the flowcharts and / or block diagrams, and the combination of the flows and / or blocks in the flowcharts and / or block diagrams can be implemented by computer program instructions. These computer program instructions can be provided to a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing devices to produce a machine, so that the instructions executed by the computer or other programmable data processing devices produce a device that implements the flowcharts and / or block diagrams. Figure 1 one flow or multiple flows and / or blocksFigure 1 means for performing the function specified by the block or blocks.

[0153] These computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions Figure 1 one or more flows and / or blocks Figure 1 means for performing the function specified by the block or blocks.

[0154] These computer program instructions can also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions Figure 1 one or more flows and / or blocks Figure 1 means for performing the function specified by the block or blocks.

[0155] While the application has been illustrated and described in connection with certain preferred embodiments thereof, it will be readily apparent to those of ordinary skill in the art that various changes in form and detail can be made therein without departing from the spirit and scope of the application. It is intended to encompass all such changes and alterations in the details thereof.

Claims

1. A heat generating component, characterized by The heating assembly comprises: a chamber for accommodating an aerosol generating article; a conductive heating track arranged in the chamber and corresponding to a smoking segment of the aerosol generating article after the aerosol generating article is inserted into the chamber, the conductive heating track comprising: a first track; a second track arranged opposite to the first track in a first direction, the first direction being an axial direction or a radial direction of the heating assembly; a capacitance detection circuit electrically connected to the conductive heating track, the first track and the second track forming an electrode pair, the capacitance detection circuit detecting a capacitance of the smoking segment corresponding to the conductive heating track through the conductive heating track; a heating circuit electrically connected to the conductive heating track and used for controlling the conductive heating track to heat the aerosol generating article; a circuit switching switch, one end of the circuit switching switch being electrically connected to the conductive heating track, and the other end of the circuit switching switch being switchable between the capacitance detection circuit and the heating circuit to electrically connect the conductive heating track to the capacitance detection circuit or the heating circuit.

2. The heat generating component of claim 1, wherein, The circuit switching switch is a multi-way switching switch, the first track comprises a first lead, the second track comprises a second lead, the first lead and the second lead are both electrically connected to a first end of the multi-way switching switch, a second end of the multi-way switching switch is electrically connected to the capacitance detection circuit or the heating circuit, the capacitance detection circuit comprises an excitation end and a detection end. The first lead and the second lead can be synchronously electrically connected to the capacitance detection circuit through the multi-way switching switch, or at least one of the first lead and the second lead can be electrically connected to the heating circuit through the multi-way switching switch. When the first lead and the second lead are simultaneously electrically connected to the capacitance detection circuit, the first lead is electrically connected to the excitation end, and the second lead is electrically connected to the detection end.

3. The heat generating component of claim 2, wherein, The detection end comprises a first detection end and a second detection end, and the conductive heating track further comprises: a third track arranged opposite to the first track in the first direction, the third track having a third lead, the third lead being electrically connected to the first end of the multi-way switching switch. When the conductive heating track is electrically connected to the capacitance detection circuit, the third lead is electrically connected to the excitation end, the first lead is electrically connected to the first detection end, and the second lead is electrically connected to the second detection end.

4. The heat generating component of claim 3, wherein, The third track is located between the first track and the second track in the first direction.

5. The heat generating component of claim 1, wherein, The first track and the second track are annular tracks, the first track and the second track are arranged opposite to each other in the axial direction of the chamber, the chamber comprises a smoking segment accommodating area for accommodating the smoking segment, the smoking segment accommodating area extends from at least a portion of an area surrounded by the first track, through a region between the first track and the second track, and to at least a portion of an area surrounded by the second track in the axial direction of the chamber.

6. The heating assembly of claim 1, wherein: The first track and the second track are arc-shaped tracks, the first track and the second track are arranged opposite along the radial direction of the chamber, and a region surrounded by the first track and the second track is used to accommodate the smoking segment. Or, The first track and the second track are spiral tracks, the first track and the second track are nested to form a double helix structure, and an internal space of the double helix structure is used to accommodate the smoking segment. Or, The first track and the second track are staggered on the side wall of the chamber, so that the first track and the second track form an interdigital structure.

7. The heat generating component of claim 1, wherein, The heating assembly further comprises an inner heating element, the first track is arranged on the side wall of the chamber, and the second track is arranged on the surface of the inner heating element; when the aerosol generating article is inserted into the chamber, the inner heating element is located inside the smoking segment, and the first track surrounds the smoking segment.

8. The heat generating component of claim 1, wherein, When the conductive heating track is electrically connected to the heating track, the first track and the second track are connected in parallel.

9. A heat generating component control method characterized by comprising: A method for controlling the heating of an aerosol generating article by the heating assembly or detecting the capacitance of the smoking segment of the aerosol generating article, the heating assembly being any one of claims 1-8, the heating assembly control method comprising: controlling the conductive heating track to access the capacitance detection circuit to detect the current capacitance value of the region inside the chamber corresponding to the conductive heating track; determining whether there is an aerosol generating article in the chamber according to the current capacitance value, if there is an aerosol generating article in the chamber, switching the conductive heating track to be electrically connected to the heating circuit, controlling the conductive heating track to heat the smoking segment of the aerosol generating article, otherwise maintaining the conductive heating track electrically connected to the capacitance detection circuit, and controlling the conductive heating track to detect the current capacitance value at a preset frequency.

10. The heat generating component control method of claim 9, wherein, If there is an aerosol generating article in the chamber, the conductive heating track is switched to be electrically connected to the heating circuit, and the conductive heating track is controlled to heat the smoking segment of the aerosol generating article, specifically comprising: If there is an aerosol generating article in the chamber, determining the type of the aerosol generating article according to the current capacitance value; determining the corresponding preset heating curve according to the type of the aerosol generating article; controlling the conductive heating track to heat the aerosol generating article according to the preset heating curve.

11. The heat generating component control method of claim 9, wherein, Further comprising: controlling the conductive heating track to heat the aerosol generating article by pulse width modulation, and the heating process comprises a plurality of heating periods and a plurality of intermittent periods which are alternated in time; wherein, in the heating period, the conductive heating track is electrically connected to the heating circuit, and the conductive heating track heats the aerosol generating article; in the intermittent period, the conductive heating track is switched to be electrically connected to the capacitance detection circuit, and the conductive heating track detects the capacitance of the smoking segment.

12. The heat generating component control method of claim 11, wherein, The control of the conductive heating track to heat the smoking segment of the aerosol generating article specifically comprises: heating the aerosol generating article at a predetermined power, detecting a real-time capacitance value of the smoking segment corresponding to the conductive heating track in multiple passes within a predetermined time to determine a descending rate of the real-time capacitance value; determining whether the descending rate is within a preset normal range; if yes, controlling the conductive heating track to continue heating the aerosol generating article at the predetermined power; if no, controlling the conductive heating track to heat the aerosol generating article at a power higher than the predetermined power when the descending rate is lower than a lower limit value of the preset normal range, and controlling the conductive heating track to heat the aerosol generating article at a power lower than the predetermined power when the descending rate is higher than an upper limit value of the preset normal range.

13. The heat generating component control method of claim 11, wherein, Further comprising: during the heating process, detecting the capacitance of the smoking segment in multiple passes through the conductive heating track, and stopping heating the aerosol generating article when the capacitance of the smoking segment is detected to be out of a preset smokeable range.

14. The heat generating component control method of claim 9, wherein, Further comprising: heating the aerosol generating article at a predetermined power, and detecting the capacitance values of multiple different smoking areas in the smoking segment in multiple passes during the heating process; adjusting the heating power of each conductive track corresponding to each smoking area according to the detected capacitance value corresponding to each smoking area.

15. A heat generating component control device characterized by comprising: A heating assembly control device for controlling a heating assembly to heat an aerosol generating article or detect the capacitance of a smoking segment of the aerosol generating article, the heating assembly being the heating assembly according to any one of claims 1-8, the heating assembly control device comprising: a capacitance detection module configured to control the conductive heating track to access the capacitance detection circuit to detect a current capacitance value of an area in the chamber corresponding to the conductive heating track; a circuit control module configured to determine whether there is an aerosol generating article in the chamber according to the current capacitance value, and if there is an aerosol generating article in the chamber, switch the conductive heating track to be electrically connected to the heating circuit to control the conductive heating track to heat the smoking segment of the aerosol generating article, or otherwise maintain the conductive heating track to be electrically connected to the capacitance detection circuit to control the conductive heating track to detect the current capacitance value at a preset frequency.

16. An electronic device, comprising: The electronic device comprises a processor and a memory, and the memory stores at least one instruction, which, when executed by the processor, implements the heating assembly control method according to any one of claims 9-14.

17. A computer-readable storage medium, characterized in that, The computer readable storage medium stores at least one instruction, which, when executed, implements the heating assembly control method according to any one of claims 9-14.

18. An aerosol-generating device comprising: comprising: the heating assembly according to any one of claims 1-8; or, the heating assembly control device according to claim 15.

Images