Aerosol-generating device

Abstract

The utility model relates to an aerosol generating device, comprising: a support, a cavity and an airflow channel are defined in the support, the cavity is located on a circulation path of the airflow channel, and the cavity is used for receiving an aerosol generating substrate; the temperature sensing unit is located in the airflow channel, the temperature sensing unit can detect the temperature of the temperature sensing unit, the temperature of the temperature sensing unit can rise under the action of external excitation, and the temperature of the temperature sensing unit drops when a user exerts a suction action on the aerosol generating device; the circuit board is connected with the temperature sensing unit and is configured to calculate the number of times that a user applies the suction action to the aerosol generating device according to the temperature change of the temperature sensing unit. According to the aerosol generating device, the problem that in the prior art, heat of the heating body is transmitted to the temperature sensor, and the temperature of the temperature sensor cannot rise to a high temperature within a short time can be solved, and therefore the accuracy of the mouth number counting function of the aerosol generating device is improved.

Description

Technical Field

[0001] This application relates to the field of heated non-combustible technology, and in particular to an aerosol generating device. Background Technology

[0002] A heated non-combustible aerosol generator is an electronic device that extracts aerosols by heating the aerosol-generating matrix (a solid matrix such as tobacco or other plant leaf products) without causing combustion. The heated non-combustible aerosol generator heats the aerosol-generating matrix to a high temperature, enough to produce aerosols but not enough to burn them, thus generating the desired aerosols without combustion.

[0003] In some exemplary prior art, there is an aerosol generating device in which a temperature sensor is fixed on a heating element and located in an airflow channel. When the aerosol generating device heats up, the heat from the heating element is transferred to the temperature sensor, and the temperature of the temperature sensor rises. When the user inhales, the airflow carries away at least part of the heat from the temperature sensor, and the temperature of the temperature sensor drops. The counting function of the aerosol generating device is realized by detecting the temperature change of the temperature sensor.

[0004] However, the heat from the heating element is transferred to the temperature sensor, and the temperature sensor cannot rise to a relatively high temperature in a short period of time. Therefore, when the user is aspirating, the temperature change of the temperature sensor may not be obvious, which reduces the accuracy of the aerosol generation device's counting function. Utility Model Content

[0005] The purpose of this application is to provide an aerosol generating device that can improve the accuracy of the counting function of the aerosol generating device.

[0006] At least one embodiment of this application provides an aerosol generating apparatus, which includes:

[0007] A support, wherein a portion of the structure defines a cavity and an airflow channel, the cavity being located on the flow path of the airflow channel, and the cavity being used to receive an aerosol-generated matrix;

[0008] A temperature sensing unit is located inside the airflow channel. The temperature sensing unit can detect its own temperature and can rise under external excitation and drop when the user applies a suction action to the aerosol generating device.

[0009] The circuit board, connected to the temperature sensing unit, is configured to calculate the number of times the user applies a suction action to the aerosol generating device based on the temperature change of the temperature sensing unit.

[0010] As an example, the temperature sensing unit is located within the cavity;

[0011] Alternatively, the temperature sensing unit is located outside the cavity and upstream of the airflow channel;

[0012] Alternatively, the temperature sensing unit may be located outside the cavity and downstream of the airflow channel.

[0013] As an example, the temperature sensing unit includes a first temperature sensor located within the airflow channel. The first temperature sensor is connected to the circuit board, which is also configured to input a pulse signal to the first temperature sensor. The first temperature sensor is capable of rising in temperature and detecting its own temperature under the action of the pulse signal, and of decreasing in temperature when the user applies a suction action to the aerosol generating device.

[0014] As an example, the first temperature sensor is configured to alternately generate heat and detect its own temperature.

[0015] As an example, the bracket is provided with at least two spaced-apart first mounting structures, each protruding from the circumferential inner wall of the cavity. The cavity and the first mounting structures are used to jointly define a portion of the structure of the airflow channel. The first temperature sensor is located outside the cavity and on the flow path of the airflow channel.

[0016] As an example, the first mounting structure includes a flange extending inward from the bottom of the bracket, and a limiting portion extending from the flange toward a side away from the bottom of the bracket, wherein the width of the limiting portion is smaller than the width of the flange, and the limiting portion has a plane.

[0017] When the aerosol generating matrix is ​​received in the cavity, the circumferential surface of the aerosol generating matrix abuts against the plane of the limiting portion, and the flange supports the aerosol generating matrix.

[0018] As an example, the circuit board also includes an electromagnetic coil connected to the circuit board, which is configured to input current into the electromagnetic coil, thereby causing the electromagnetic coil to generate a magnetic field.

[0019] As an example, the temperature sensing unit includes:

[0020] The first heating element is located in the airflow channel. The first heating element can rise in temperature under the action of the magnetic field and drop in temperature when the user applies a suction action to the aerosol generating device.

[0021] A second temperature sensor is fixedly mounted on the first heating element and is at least partially located within the airflow channel. The second temperature sensor is connected to the circuit board and is configured to detect the temperature of the first heating element.

[0022] As an example, the second temperature sensor includes a probe and leads, the probe being fixedly mounted on the first heating element and located within the airflow channel;

[0023] The top of the cavity is provided with a notch, one end of the lead wire is connected to the probe, and the other end of the lead wire passes through the notch and is connected to the circuit board; or, a lead wire through hole is provided at the position opposite to the first heating element in the cavity, one end of the lead wire is connected to the probe, and the other end of the lead wire passes through the lead wire through hole and is connected to the circuit board.

[0024] As an example, the bracket is provided with a second mounting structure, which extends along the length of the bracket and protrudes from the circumferential inner wall of the cavity and is arranged along the circumferential inner wall of the cavity; the cavity and the second mounting structure are used to jointly define a portion of the structure of the airflow channel, and the temperature sensing unit is fixed on the flow path of the airflow channel in the cavity.

[0025] As an example, at least part of the second mounting structure includes an abutment portion and a limiting portion connected to each other, the abutment portion and the limiting portion forming a limiting boss, the abutment portion having a plane;

[0026] When the aerosol generating matrix is ​​received in the cavity, the circumferential surface of the aerosol generating matrix abuts against the plane of the abutment portion, and the limiting boss supports the aerosol generating matrix.

[0027] As an example, the second mounting structure further includes a guide portion, the guide portion, the abutment portion, and the limiting portion arranged along the insertion direction of the aerosol generating matrix, the guide portion extending obliquely from the intersection of the guide portion and the circumferential inner wall surface of the cavity to the intersection of the plane of the guide portion and the abutment portion.

[0028] As an example, the bracket is further provided with a third mounting structure for winding the electromagnetic coil. The third mounting structure extends along the length of the bracket, protrudes from the circumferential outer wall of the bracket, and is arranged along the circumferential outer wall of the bracket.

[0029] As an example, the third mounting structure includes a plurality of spaced protrusions, with at least a portion of the electromagnetic coil wound between two adjacent protrusions.

[0030] As an example, a second heating element is provided inside the support or the aerosol generating matrix. The second heating element can generate heat under the action of the magnetic field, thereby heating the aerosol generating matrix received in the cavity.

[0031] In the aerosol generating device provided in the above embodiments, the temperature of the device is detected by a temperature sensing unit located in the airflow channel. The temperature can rise under external excitation and drop when the user applies a suction action to the aerosol generating device. This avoids the problem in the prior art where the heat of the heating element is transferred to the temperature sensor, and the temperature of the temperature sensor cannot rise to a relatively high temperature in a short time. This improves the accuracy of the counting function of the aerosol generating device. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the accompanying drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0033] Figure 1 This is a schematic diagram of the structure of the first aerosol generating device for receiving an aerosol generating matrix provided in the embodiments of this application;

[0034] Figure 2 yes Figure 1 The first type of cross-sectional view;

[0035] Figure 3 yes Figure 2 A partial view;

[0036] Figure 4 yes Figure 2 and Figure 3 The diagram shows the structure of the support frame.

[0037] Figure 5 yes Figure 1 The second type of cross-sectional view;

[0038] Figure 6 This is a schematic diagram of the structure of the second aerosol generating device for receiving an aerosol generating matrix provided in the embodiments of this application;

[0039] Figure 7 yes Figure 6 The first type of cross-sectional view;

[0040] Figure 8 yes Figure 7 A partial view;

[0041] Figure 9 This is a schematic diagram of the structure of a bracket and a temperature sensing unit provided in an embodiment of this application from a first-view perspective;

[0042] Figure 10 This is a schematic diagram of the structure of a bracket and a temperature sensing unit provided in an embodiment of this application from a second perspective;

[0043] Figure 11 yes Figure 6 The second type of cross-sectional view;

[0044] Figure 12 This is a cross-sectional view of a bracket and a temperature sensing unit provided in an embodiment of this application. Detailed Implementation

[0045] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0046] The terms "first," "third," and "third" used in this application are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number or order of the indicated technical features. All directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationship or movement of the components in a specific orientation (as shown in the accompanying drawings). If the specific orientation changes, the directional indication will also change accordingly. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or devices.

[0047] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0048] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be intervening elements. When an element is referred to as being "connected to" another element, it can be directly connected to the other element, or there may be one or more intervening elements. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementations.

[0049] Please refer to Figures 1 to 3 This application provides an embodiment of an aerosol generating device 100 for receiving an aerosol generating matrix 200. The aerosol generating device 100 includes: a support 10, within which a partial structure L11 defines a cavity 101 and an airflow channel L1. The cavity 101 is located on the flow path of the airflow channel L1 and is used to receive the aerosol generating matrix 200; a temperature sensing unit 20 located within the airflow channel L1, capable of detecting its own temperature and experiencing a temperature rise under external excitation and a temperature drop when a user applies a suction action to the aerosol generating device 100; and a circuit board 30 connected to the temperature sensing unit 20 and configured to calculate the number of times the user applies a suction action to the aerosol generating device 100 based on the temperature change of the temperature sensing unit 20.

[0050] As an independent heating element, the temperature sensing unit 20 can generate heat autonomously and heat up quickly. When a suction action occurs, the temperature sensing unit 20 will show a significant temperature change, thereby improving the accuracy of the counting function of the aerosol generation device.

[0051] In some embodiments, the aerosol generating matrix 200 may be part of an aerosol generating article. The aerosol generating device 100 may be a device that interacts with the aerosol generating matrix 200 of the aerosol generating article to generate an aerosol that can be directly inhaled into the user's lungs through the user's mouth, by heating or otherwise atomizing the aerosol generating matrix 200 to form an aerosol. The aerosol generating matrix 200 may be wholly or partially contained within the aerosol generating device 100.

[0052] The aerosol generating matrix 200 may be a solid aerosol generating matrix. Alternatively, the aerosol generating matrix 200 may be a liquid or may include both solid and liquid components. The aerosol generating matrix 200 may include tobacco-containing material containing volatile tobacco flavor compounds released from the matrix upon heating. Alternatively, the aerosol generating matrix 200 may include non-tobacco materials. The aerosol generating matrix 200 may further include an aerosol forming agent. Examples of suitable aerosol forming agents are glycerol and propylene glycol.

[0053] If the aerosol generating matrix 200 is a solid aerosol generating matrix, then the solid aerosol generating matrix may include one or more of the following: powder, granules, pellets, fragments, strips, bars, or sheets, wherein the material contains one or more of herbaceous plant leaves, tobacco leaves, tobacco ribs, reconstituted tobacco, homogenized tobacco, extruded tobacco, cast leaf tobacco, and expanded tobacco. The solid aerosol generating matrix may be in a loose form or may be provided in a suitable container or tube.

[0054] If desired, the solid aerosol generating matrix may contain additional tobacco or non-tobacco volatile aroma compounds that are released upon heating of the matrix. The solid aerosol generating matrix may also contain capsules, such as those containing additional tobacco or non-tobacco volatile aroma compounds, and these capsules may melt during heating of the solid aerosol generating matrix.

[0055] As needed, the solid aerosol generating matrix can be provided on or embedded in a heat-stable carrier. The carrier can be in the form of powder, granules, microspheres, fragments, strips, bars, or sheets. Alternatively, the carrier can be a tubular carrier with a thin layer of solid matrix deposited on its inner surface, its outer surface, or both. This tubular carrier can be formed from, for example, paper or paper-like materials, nonwoven carbon fiber pads, low-quality open-mesh metal wire mesh or perforated metal foil, or any other heat-stable polymer matrix. The solid aerosol generating matrix can be deposited on the surface of the carrier in the form of, for example, sheets, foams, gels, or slurries. The solid aerosol generating matrix can be deposited on the entire surface of the carrier, or alternatively, it can be deposited in a patterned manner to provide uneven fragrance delivery during use.

[0056] Although a solid aerosol generating matrix has been mentioned above, those skilled in the art will appreciate that other embodiments may use other forms of aerosol generating matrix 200. For example, the aerosol generating matrix 200 may be a liquid aerosol forming matrix. If a liquid aerosol generating matrix is ​​provided, the aerosol generating apparatus 100 preferably includes components for retaining the liquid. For example, the liquid aerosol generating matrix may be retained in a container. Alternatively, the liquid aerosol forming matrix may be absorbed into a porous support material. The porous support material may be made of any suitable absorbent plug or absorbent, such as foamed metal or plastic materials, polypropylene, polyester, nylon fibers, or ceramics. The liquid aerosol generating matrix may be retained in the porous support material before use of the aerosol generating apparatus 100, or alternatively, the liquid aerosol generating matrix material may be released into the porous support material during use or just before use. For example, the liquid aerosol forming matrix may be provided in a capsule. The capsule shell is preferably melted upon heating and releases the liquid aerosol generating matrix into the porous support material. The capsule may contain a combination of solids and liquids, as needed. Alternatively, the carrier for the liquid aerosol generating matrix may be a nonwoven fabric or fiber bundle containing tobacco components. The nonwoven fabric or fiber bundle may include, for example, carbon fibers, natural cellulose fibers, or cellulose-derived fibers.

[0057] During operation, the aerosol generating matrix 200 may be completely contained within the aerosol generating apparatus 100. In this case, the user can aspirate using the nozzle of the aerosol generating apparatus 100. Alternatively, during operation, the aerosol forming article containing the aerosol generating matrix 200 may be partially contained within the aerosol generating apparatus 100. In this case, the user can directly aspirate using the aerosol forming article.

[0058] The aerosol-forming article may be substantially cylindrical in shape. The aerosol-forming article may be substantially elongated. The aerosol-forming article may have a certain length and a circumference substantially perpendicular to said length. The aerosol-generating matrix 200 may be substantially cylindrical in shape. The aerosol-generating matrix 200 may be substantially elongated. The aerosol-generating matrix 200 may also have a certain length and a circumference substantially perpendicular to said length.

[0059] The total length of the aerosol-forming article can be between approximately 30 mm and approximately 100 mm. The aerosol-forming article can have an outer diameter between approximately 5 mm and approximately 12 mm. The aerosol-forming article may include a filter plug. The filter plug may be located at the downstream end of the aerosol-forming article. The filter plug may be a cellulose acetate filter plug. In one embodiment, the length of the filter plug is approximately 7 mm, but it may have a length between approximately 5 mm and approximately 10 mm.

[0060] In one embodiment, the total length of the aerosol-forming article is approximately 45 mm. The aerosol-forming article may have an outer diameter of approximately 7.2 mm. Furthermore, the aerosol-generating matrix 200 may have a length of approximately 10 mm. Alternatively, the aerosol-generating matrix 200 may have a length of approximately 12 mm. Additionally, the diameter of the aerosol-generating matrix 200 may be between approximately 5 mm and approximately 12 mm. The aerosol-forming article may include an outer packaging paper. Furthermore, the aerosol-generating article may include a separator between the aerosol-generating matrix 200 and a filter plug. The separator may be approximately 18 mm, but may range from approximately 5 mm to approximately 25 mm.

[0061] In some embodiments, the cavity 101 is located on the flow path of the airflow channel L1, dividing the airflow channel L1 into upper, middle, and lower parts. The temperature sensing unit 20 can be disposed at any position in the airflow channel L1. For example, the temperature sensing unit 20 is located inside the cavity 101. Alternatively, the temperature sensing unit 20 is located outside the cavity 101 and upstream of the airflow channel L1, that is, the temperature sensing unit 20 can be disposed near the insertion port of the cavity 101, which can avoid interference from impurities such as soot from the aerosol generation matrix after heating with the sensitivity of the temperature sensing unit 20. Alternatively, the temperature sensing unit 20 is located outside the cavity 101 and downstream of the airflow channel L1, which can avoid interference from the temperature sensing unit 20 with the insertion of the aerosol generation article.

[0062] In some embodiments, the cavity 101 is located on the flow path of the airflow channel L1, dividing the airflow channel L1 into upper and lower parts. The temperature sensing unit 20 can be disposed at any position in the airflow channel L1. For example, the temperature sensing unit 20 is located inside the cavity 101. Alternatively, the temperature sensing unit 20 is located outside the cavity 101 and upstream of the airflow channel L1.

[0063] In some embodiments, the external stimulus is a pulse signal input to the circuit board 30.

[0064] like Figure 2 and Figure 3 As shown, the temperature sensing unit 20 includes a first temperature sensor 21 located in the airflow channel L1. The first temperature sensor 21 is connected to the circuit board 30. The circuit board 30 is also configured to input a pulse signal to the first temperature sensor 21. The first temperature sensor 21 can rise in temperature and detect its own temperature under the action of the pulse signal, and can drop in temperature when the user applies a suction action to the aerosol generating device 100.

[0065] In some embodiments, the first temperature sensor 21 is configured to alternately heat up and detect its own temperature. In one embodiment, the first temperature sensor 21 is a thermocouple. During the high level of the pulse signal, the thermocouple heats up, generating Joule heat, and thus the thermocouple temperature rises; during the low level of the pulse signal, the thermocouple's own temperature is detected by the thermoelectric effect. The thermocouple temperature is maintained at T degrees by the number of pulses in the pulse signal. Alternatively, the thermocouple temperature is maintained at T ± n degrees by the number of pulses in the pulse signal. When the user applies a suction action to the aerosol generating device 100, cold outside air enters the airflow channel L1, causing the thermocouple temperature to drop, resulting in a temperature change ΔT. This temperature change of the thermocouple is used to characterize the suction action, i.e., the number of times the user applies a suction action to the aerosol generating device 100.

[0066] In some embodiments, please refer to Figure 4 and Figure 5 The bracket 10 is provided with at least two spaced first mounting structures 11. The first mounting structures 11 protrude from the circumferential inner wall of the cavity 101. The cavity 101 and the first mounting structures 11 are used to jointly define a part of the structure L11 of the airflow channel L1. The first temperature sensor 21 is located outside the cavity 101 and on the flow path of the airflow channel L1.

[0067] In some embodiments, the first temperature sensor 21 may also be disposed on the flow path of a portion of the structure L11 of the airflow channel L1 within the cavity 101.

[0068] In some embodiments, the first mounting structure 11 includes a flange 111 extending inward from the bottom of the bracket 10, and a limiting portion 112 extending from the flange 111 toward the side opposite to the bottom of the bracket 10, wherein the width of the limiting portion 112 is smaller than the width of the flange 111, and the limiting portion 112 has a plane 1121; when the aerosol generating matrix 200 is received in the cavity 101, the circumferential surface of the aerosol generating matrix 200 abuts against the plane 1121 of the limiting portion 112, and the flange 111 supports the aerosol generating matrix 200.

[0069] In some embodiments, the limiting portion 112 further has a guide slope 1122, which is inclined from the top of the cavity 101 toward the plane 1121, which facilitates the smooth reception of the aerosol generating matrix 200 into the cavity 101.

[0070] In some embodiments, the bracket 10 is provided with two opposing and spaced first mounting structures 11. Based on the above, the first mounting structure 11 includes a flange 111 extending inward from the bottom of the bracket 10, and a limiting portion 112 extending from both ends of the flange 111 toward the side away from the bottom of the bracket 10, wherein the width of the limiting portion 112 is smaller than the width of the flange 111, and the limiting portion 112 has a plane. When the aerosol generating matrix 200 is received in the cavity 101, the circumferential surface of the aerosol generating matrix 200 abuts against the plane of the limiting part 112. The inner wall surface of the cavity 101, the limiting parts 112 of the two first mounting structures 11 and the circumferential surface of the aerosol generating matrix 200 define a first part of the airflow channel. When the aerosol generating matrix 200 is received in the cavity 101, the flange 111 supports the aerosol generating matrix 200. The bottom of the cavity 101, the flange 111 of the two first mounting structures 11 and the bottom of the aerosol generating matrix 200 define a second part of the airflow channel. The first part of the airflow channel and the second part of the airflow channel are connected to each other, forming a partial structure L11 of the airflow channel L1.

[0071] In some embodiments, please refer again Figure 2 and Figure 3 The aerosol generating device 100 also includes an electromagnetic coil 40 connected to a circuit board 30, the circuit board 30 being configured to input current into the electromagnetic coil 40, thereby causing the electromagnetic coil 40 to generate a magnetic field. The aerosol generating device 100 also includes a heating element 50, which is fixed on a support 10. The heating element 50 and the support 10 together define a portion of the structure of the airflow channel L1. The heating element 50 is used to contain the aerosol generating matrix 200, and the heating element 50 is capable of generating heat under the action of the magnetic field, which is conducted to the aerosol generating matrix 200 to heat and atomize the aerosol generating matrix 200 to form an aerosol.

[0072] In some embodiments, the heating element 50 may be substantially tubular in shape and may be used to house an aerosol-formed article that is substantially cylindrical in shape.

[0073] In other embodiments, the heating method of the heating element 50 may also include resistance heating, infrared radiation heating, air heating, etc. Adaptably, the aerosol generating device 100 preferably includes components for heating the heating element 50.

[0074] Please refer to it again. Figures 1 to 3 The aerosol generating device 100 also includes a sliding cover assembly 1, a housing 2, a mounting bracket 3, a battery cell 4, a top cover assembly 5, and a charging interface 6.

[0075] In some embodiments, the sliding cover assembly 1 is disposed on the top cover assembly 5, and can slide or rotate to cover or expose the receiving opening on the top cover assembly 5. During use of the aerosol generating device 100, the sliding cover assembly 1 is slid or rotated to expose the receiving opening on the top cover assembly 5, allowing the aerosol generating matrix 200 to be received into the aerosol generating device 100 through the receiving opening; when the aerosol generating device 100 is not in use, the sliding cover assembly 1 is slid or rotated to close the receiving opening on the top cover assembly 5, preventing foreign objects or moisture from entering the interior of the aerosol generating device 100 through the receiving opening, thereby extending the service life of the aerosol generating device 100.

[0076] The outer casing 2 defines the outer surface of the aerosol generating device 100 and is made of a rigid material such as ceramic or polymer plastic. In an optional embodiment, the outer casing 2 defines an internal space. A mounting bracket 3 is used to fix and mount the circuit board 30, and the mounting bracket 3 divides the internal space laterally, with one portion serving as a receiving cavity for receiving and accommodating the circuit board 30, and another portion serving as a receiving cavity for receiving and accommodating the bracket 10 and the battery cell 4. In an optional embodiment, the receiving cavity for receiving and accommodating the bracket 10 and the battery cell 4 is divided along the length direction, with the upper portion serving to receive and accommodate the bracket 10 and the lower portion serving to receive and accommodate the battery cell 4. A top cover assembly 5 seals the open end of the outer casing 2. A charging interface 6 is located at the bottom of the aerosol generating device 100 for charging the battery cell 4.

[0077] The complete airflow channel L1 is defined by multiple components. Figure 3 In the embodiment shown, the circumferential surfaces of the top cover assembly 5, the heating element 50, the support 10, and the aerosol generating matrix 200 together define the airflow channel L1.

[0078] Please refer to Figures 6 to 8 This application provides an embodiment of an aerosol generating device 100 for receiving an aerosol generating matrix 200. The aerosol generating device 100 includes: a support 10, which defines a cavity 101 and a partial structure of an airflow channel L2. The cavity 101 is located on the flow path of the airflow channel L2 and is used to receive the aerosol generating matrix 200; a temperature sensing unit 20 located in the airflow channel L2, which can detect its own temperature and can rise under external excitation and fall when a user applies a suction action to the aerosol generating device 100; a circuit board 30 connected to the temperature sensing unit 20 and configured to calculate the number of times the user applies a suction action to the aerosol generating device 100 based on the temperature change of the temperature sensing unit 20; and an electromagnetic coil 40 connected to the circuit board 30, which is also configured to input current to the electromagnetic coil 40, thereby generating a magnetic field in the electromagnetic coil 40.

[0079] As an independent heating element, the temperature sensing unit 20 can generate heat autonomously and heat up quickly. When a suction action occurs, the temperature sensing unit 20 will show a significant temperature change, thereby improving the accuracy of the counting function of the aerosol generation device.

[0080] In this embodiment, the external excitation is the magnetic field generated by the electromagnetic coil 40.

[0081] When current flows through the electromagnetic coil 40 to generate a magnetic field, the temperature sensing unit 20 can detect its own temperature and its temperature can rise under the influence of the magnetic field. When the user applies a suction action to the aerosol generating device 100, the temperature drops. The temperature change of the temperature sensing unit 20 represents the suction action, that is, the number of times the user applies a suction action to the aerosol generating device 100.

[0082] In some embodiments, the cavity 101 is located on the flow path of the airflow channel L2, dividing the airflow channel L2 into upper, middle, and lower parts. The temperature sensing unit 20 can be disposed at any position in the airflow channel L2. For example, the temperature sensing unit 20 is located inside the cavity 101. Alternatively, the temperature sensing unit 20 is located outside the cavity 101 and upstream of the airflow channel L2, that is, the temperature sensing unit 20 can be disposed near the insertion port of the cavity 101, which can avoid interference from impurities such as soot from the aerosol generation matrix after heating with the sensitivity of the temperature sensing unit 20. Alternatively, the temperature sensing unit 20 is located outside the cavity 101 and downstream of the airflow channel L2, which can avoid interference from the temperature sensing unit 20 with the insertion of the aerosol generation article.

[0083] In some embodiments, the cavity 101 is located on the flow path of the airflow channel L2, dividing the airflow channel L2 into upper and lower parts. The temperature sensing unit 20 can be disposed at any position in the airflow channel L2. For example, the temperature sensing unit 20 is located inside the cavity 101. Alternatively, the temperature sensing unit 20 is located outside the cavity 101 and upstream of the airflow channel L2.

[0084] In some embodiments, please refer to Figure 9 , Figure 10 and Figure 12 The temperature sensing unit 20 includes: a first heating element 22 located in the airflow channel L2, the first heating element 22 being able to rise in temperature under the action of a magnetic field and decrease in temperature when the user applies a suction action to the aerosol generating device 100; and a second temperature sensor 23 fixedly mounted on the first heating element 22 and at least partially located in the airflow channel L2, the second temperature sensor 23 being connected to the circuit board 30 and configured to detect the temperature of the first heating element 22.

[0085] In an optional embodiment, the first heating element 22 is a metal sheet. In some embodiments, the metal sheet includes a magnetic or conductive material, including but not limited to iron, nickel, stainless steel, copper, etc. In some embodiments, the metal sheet is fixed inside the cavity 101. When the aerosol generating device 100 is working, the circuit board 30 inputs current to the electromagnetic coil 40, the electromagnetic coil 40 generates a magnetic field, and the metal sheet heats up under the action of the magnetic field, causing the temperature of the metal sheet to rise; when the user applies a suction action to the aerosol generating device 100, external cold air moves along the airflow channel L2, carrying away at least part of the heat from the metal sheet, causing the temperature of the metal sheet to drop. At this time, the second temperature sensor 23 mounted on the metal sheet detects the temperature change of the metal sheet and sends it to the circuit board 30, so that the circuit board 30 calculates the number of times the user applies a suction action to the aerosol generating device 100 based on the temperature change of the temperature sensing unit 20.

[0086] In some embodiments, the second temperature sensor 23 includes a probe 231 and a lead wire 232. The probe 231 is fixedly mounted on the first heating element 22 and located within the airflow channel L2. A notch 102 is provided at the top of the cavity 101. One end of the lead wire 232 is connected to the probe 231, and the other end of the lead wire 232 passes through the notch 102 and is connected to the circuit board 30. Alternatively, a lead wire through hole 103 is provided at the relative position between the cavity 101 and the first heating element 22. One end of the lead wire 232 is connected to the probe 231, and the other end of the lead wire 232 passes through the lead wire through hole 103 and is connected to the circuit board 30.

[0087] In some embodiments, the bracket 10 is provided with a second mounting structure 12, which extends along the length of the bracket 10 and protrudes from the circumferential inner wall of the cavity 101 and is arranged along the circumferential inner wall of the cavity 101; the cavity 101 and the second mounting structure 12 are used to jointly define a portion of the structure L21 of the airflow channel L2, and the temperature sensing unit 20 is fixed on the flow path of the airflow channel L2 in the cavity 101.

[0088] In some embodiments, the temperature sensing unit 20 may also be disposed on the flow path of the airflow channel L2 above or below the cavity 101.

[0089] In some embodiments, at least a portion of the second mounting structure 12 includes an abutment portion 121 and a limiting portion 122 connected to each other, the abutment portion 121 and the limiting portion 122 forming a limiting boss, the abutment portion 121 having a plane; when the aerosol generating matrix 200 is received in the cavity 101, the circumferential surface of the aerosol generating matrix 200 abuts against the plane of the abutment portion 121, and the limiting boss supports the aerosol generating matrix 200.

[0090] In some embodiments, the bracket 10 is provided with eight second mounting structures 12, wherein four of the second mounting structures 12 include abutment portions 121 and limiting portions 122 connected to each other, and the four second mounting structures 12 include abutment portions 121, which are staggered. When the aerosol generating matrix 200 is received in the cavity 101, the circumferential surface of the aerosol generating matrix 200 abuts against the plane of the abutment portion 121, and the inner wall surface of the cavity 101, two adjacent second mounting structures 12, and the circumferential surface of the aerosol generating matrix 200 define a first part of the airflow channel; when the aerosol generating matrix 200 is received in the cavity 101, the limiting boss supports the aerosol generating matrix 200, and the bottom of the cavity 101, two adjacent second mounting structures 12, and the bottom of the aerosol generating matrix 200 define a second part of the airflow channel; wherein the first part of the airflow channel and the second part of the airflow channel are interconnected, forming a partial structure L21 of the airflow channel L2.

[0091] In some embodiments, the support 10 is provided with a fourth mounting structure that protrudes from the bottom of the cavity 101. When the aerosol generating matrix 200 is received in the cavity 101, the fourth mounting structure supports the aerosol generating matrix 200.

[0092] In an optional embodiment, the fourth mounting structure is a boss.

[0093] In some embodiments, the second mounting structure 12 further includes a guide portion 123. The guide portion 123, the abutment portion 121, and the limiting portion 122 are arranged along the insertion direction of the aerosol generating matrix 200. The guide portion 123 extends obliquely from the intersection of the guide portion 123 and the circumferential inner wall surface of the cavity 101 to the intersection of the plane of the guide portion 123 and the abutment portion 121. The guide portion 123 facilitates the smooth reception of the aerosol generating matrix 200 into the cavity 101.

[0094] In some embodiments, the bracket 10 is further provided with a third mounting structure 13 for winding the electromagnetic coil 40. The third mounting structure 13 extends along the length direction of the bracket 10, protrudes from the circumferential outer wall of the bracket 10, and is arranged along the circumferential outer wall of the bracket 10.

[0095] In some embodiments, the third mounting structure 13 includes a plurality of spaced protrusions 131, with at least a portion of the electromagnetic coil 40 wound between two adjacent protrusions 131.

[0096] In some embodiments, a second heating element 201 is provided inside the support 10 or the aerosol generating matrix 200. The second heating element 201 can generate heat under the action of a magnetic field, thereby heating the aerosol generating matrix 200 received in the cavity 101.

[0097] Please refer to it again. Figures 6 to 8In some embodiments, the aerosol generating device 100 further includes a seal 60 disposed between the top cover assembly 5 and the bracket 10 to prevent aerosol from escaping from the airflow channel L2.

[0098] In some embodiments, the aerosol generating device 100 further includes a magnetic shielding sleeve 70, which is fitted onto the electromagnetic coil 40. Optionally, the aerosol generating device 100 further includes a first heat insulation member 80, which is fitted onto the electromagnetic coil 40 and located between the electromagnetic coil 40 and the magnetic shielding sleeve 40. Optionally, the aerosol generating device 100 further includes a second heat insulation member 90, which is fitted onto the magnetic shielding sleeve 70.

[0099] In some embodiments, the aerosol generating device 100 further includes a sliding cover assembly 1, a housing 2, a mounting bracket 3, a battery cell 4, a top cover assembly 5, a charging interface 6, and a switch 7.

[0100] In some embodiments, the structural arrangement of the sliding cover assembly 1, housing 2, mounting bracket 3, battery cell 4, and charging interface 6 may refer to Figure 2 The relevant descriptions are not repeated here. In some embodiments, the top cover assembly 5 is disposed on the bracket 10 and adapted to the housing 2 for sealing the opening end of the housing 2. In an optional embodiment, the top cover assembly 5 includes a top cover bracket 51 and a top cover 52. The switch 7 is connected to the circuit board 30 and can be used to control the aerosol generating device 100 to start or stop heating. Alternatively, the aerosol generating device 100 can be activated by the switch 7.

[0101] The complete airflow channel L2 is defined by multiple components. Figure 8 In the embodiment shown, the circumferential surfaces of the top cover assembly 5, the seal 60, the bracket 10, and the aerosol generating matrix 200 together define the airflow channel L2.

[0102] It should be noted that the preferred embodiments of this application are given in the specification and accompanying drawings, but are not limited to the embodiments described in this specification. Furthermore, those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. An aerosol-generating device, characterized by, The application relates to an aerosol-generating device, comprising: a support, which defines a partial structure of a cavity and an airflow channel, the cavity being located on a flow path of the airflow channel and used for receiving an aerosol-generating substrate; a temperature sensing unit, which is located in the airflow channel, can detect its own temperature, and can rise in temperature under external excitation and drop in temperature when a user applies a puffing action to the aerosol-generating device; a circuit board, which is connected to the temperature sensing unit and configured to calculate the number of times that a user applies a puffing action to the aerosol-generating device according to the temperature change of the temperature sensing unit.

2. The aerosol-generating device of claim 1, wherein, The temperature sensing unit is located in the cavity. Alternatively, the temperature sensing unit is located outside the cavity and upstream of the airflow channel. Alternatively, the temperature sensing unit is located outside the cavity and downstream of the airflow channel.

3. The aerosol-generating device according to claim 1 or 2, wherein, The temperature sensing unit comprises a first temperature sensor, which is located in the airflow channel and connected to the circuit board, the circuit board is further configured to input a pulse signal to the first temperature sensor, the first temperature sensor can rise in temperature and detect its own temperature under the action of the pulse signal, and can drop in temperature when a user applies a puffing action to the aerosol-generating device.

4. The aerosol-generating device of claim 3, wherein, The first temperature sensor is configured to alternately heat and detect its own temperature.

5. The aerosol-generating device of claim 3, wherein, The support is provided with at least two spaced first mounting structures, the first mounting structures protrude from the circumferential inner wall surface of the cavity, the cavity and the first mounting structures are used to jointly define a partial structure of the airflow channel, and the first temperature sensor is located outside the cavity and on the flow path of the airflow channel.

6. The aerosol-generating device of claim 5, wherein, The first mounting structure comprises a flange extending inward from the bottom of the support and a limiting portion extending from the flange to a side away from the bottom of the support, and the width of the limiting portion is smaller than that of the flange, and the limiting portion has a flat surface; When the aerosol-generating substrate is received in the cavity, the circumferential surface of the aerosol-generating substrate abuts against the flat surface of the limiting portion, and the flange supports the aerosol-generating substrate.

7. The aerosol-generating device of claim 1 or 2, wherein, Further comprising an electromagnetic coil connected to the circuit board, and the circuit board is further configured to input current to the electromagnetic coil, so that the electromagnetic coil generates a magnetic field.

8. The aerosol-generating device of claim 7, wherein, The temperature sensing unit comprises: a first heating element, which is located in the airflow channel, can rise in temperature under the action of the magnetic field, and drop in temperature when a user applies a puffing action to the aerosol-generating device; a second temperature sensor, which is fixedly installed on the first heating element and at least partially located in the airflow channel, connected to the circuit board, and configured to detect the temperature of the first heating element.

9. The aerosol-generating device of claim 8, wherein, The second temperature sensor comprises a probe and a lead, the probe is fixedly installed on the first heating element and located in the airflow channel. The top of the cavity is provided with a notch, one end of the lead wire is connected with the probe, and the other end of the lead wire is connected with the circuit board through the notch; or, the cavity and the first heating element are provided with a lead wire through hole in the opposite position, one end of the lead wire is connected with the probe, and the other end of the lead wire is connected with the circuit board through the lead wire through hole. 10.The aerosol-generating device of claim 7, wherein, The support is provided with a second mounting structure extending along the length direction of the support, the second mounting structure protrudes from and is arranged along the circumferential inner wall surface of the cavity, and the cavity and the second mounting structure are used to jointly define part of the airflow channel, and the temperature sensing unit is fixed on the flow path of the airflow channel in the cavity. 11.The aerosol-generating device of claim 10, wherein, At least part of the second mounting structure includes an abutting portion and a limiting portion connected with each other, the abutting portion and the limiting portion form a limiting boss, and the abutting portion has a plane; When the aerosol generating substrate is received in the cavity, the circumferential surface of the aerosol generating substrate abuts against the plane of the abutting portion, and the limiting boss supports the aerosol generating substrate. 12.The aerosol-generating device of claim 11, wherein, The second mounting structure further includes a guide portion, the guide portion, the abutting portion and the limiting portion are arranged in the insertion direction of the aerosol generating substrate, and the guide portion extends obliquely from the intersection of the guide portion and the circumferential inner wall surface of the cavity to the intersection of the guide portion and the plane of the abutting portion. 13.The aerosol-generating device of claim 7, wherein, The support is further provided with a third mounting structure for winding the electromagnetic coil, the third mounting structure extends along the length direction of the support, the third mounting structure protrudes from and is arranged along the circumferential outer wall surface of the support.

14. The aerosol-generating device of claim 13, wherein, The third mounting structure includes a plurality of spaced apart protruding portions, and at least part of the electromagnetic coil is wound between two adjacent protruding portions. 15.The aerosol-generating device of claim 7, wherein, The support or the aerosol generating substrate is provided with a second heating element, the second heating element can generate heat under the action of the magnetic field, thereby being capable of heating the aerosol generating substrate received in the cavity.

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