An air flow detection assembly for an electronic cigarette and an electronic cigarette

Abstract

The utility model relates to a kind of airflow detection components and electronic cigarette for electronic cigarette, the airflow detection component includes base, pneumatic membrane, magnet and magnetic sensor;The pneumatic membrane is connected in the base, the magnet is fixed on the pneumatic membrane, and can be moved under the driving of the pneumatic membrane, the movement direction of the magnet is along first direction, the pole distribution direction of the magnet is along first direction distribution or along perpendicular to first direction distribution;The magnetic sensor, fixed in the base, and with the magnet along the first direction directly opposite;The magnetic sensor includes first sensing unit and second sensing unit, for sensing the magnetic field generated by the magnet and environmental magnetic field.The utility model therefore has the hardware foundation of realizing anti-magnetic interference, preventing atomization device false triggering.

Description

Technical Field

[0001] This application relates to the field of electronic cigarettes, and more particularly to an airflow detection component for electronic cigarettes and an electronic cigarette. Background Technology

[0002] In the field of e-cigarettes, detecting the inhalation action of smokers is a crucial step, as it determines whether the atomizing device is triggered to atomize e-liquid. Existing airflow detection components for detecting smokers' inhalation actions disclose related detection technologies such as a pneumatic diaphragm with a magnet and a magnetic sensor. The working principle of this type of airflow detection component is as follows: When a smoker uses an e-cigarette, their inhalation action causes airflow changes (including changes in airflow velocity, airflow direction, and air pressure) in the inhalation airflow path of the e-cigarette. The pneumatic diaphragm located in the inhalation airflow path deforms accordingly due to the airflow changes (similar to the deformation of a diaphragm, either concave or convex). This deformation of the pneumatic diaphragm causes the magnet located on it to move, and the magnetic sensor located corresponding to the magnet is used to detect the magnetic field changes generated by the magnet's displacement. By analyzing the magnetic field changes, the smoker's inhalation action is detected, and then a signal is transmitted to the atomizing device to determine whether the atomizing device should trigger the atomization action to output e-liquid.

[0003] In actual use of these electronic cigarettes, magnetic sensors are susceptible to interference from stray magnetic fields in the environment. This can lead to false triggering of the atomizing device due to magnetic field changes caused by non-magnetic displacement. To address this, some magnetic field sensors on the market incorporate the detection of stray magnetic fields in the environment. For example, they add magnetic field sensing units to increase the detection of magnetic fields in different directions and perform comprehensive analysis and calculation of the detected magnetic fields in different directions to ultimately determine whether interfering magnetic fields exist, thus enabling the electronic cigarette to prevent interference and false activation. However, complex calculations are required to distinguish the presence of interfering magnetic fields, and the technical solution for the airflow detection component needs further optimization. Utility Model Content

[0004] This application provides an airflow detection component for electronic cigarettes, including a substrate, an aerodynamic diaphragm, a magnet, and a magnetic sensor. The aerodynamic diaphragm is connected to the substrate and is located in the inhalation airflow path of the electronic cigarette during use, and can undergo elastic deformation in response to changes in air pressure in the inhalation airflow path. The magnet is fixed on the aerodynamic diaphragm and can move under the drive of the aerodynamic diaphragm, with the movement direction of the magnet along a first direction. The magnetic sensor is fixed on the substrate and is directly opposite the magnet along the first direction. The magnetic sensor includes a first sensing unit and a second sensing unit. The first sensing unit is used to sense a magnetic field parallel to the first direction, and the second sensing unit is used to sense a magnetic field parallel to a second direction, which is perpendicular to the first direction. The magnetic pole distribution direction of the magnet is parallel to the first direction, and the first sensing unit is used to sense the magnetic field generated by the magnet; or the magnetic pole distribution direction of the magnet is perpendicular to the first direction, and the second sensing unit is used to sense the magnetic field generated by the magnet.

[0005] As can be seen from the above, due to the synergistic improvement of the relative position / motion relationship between the magnetic sensor and the magnet, the magnetic pole distribution direction of the magnet, and the sensing direction of the magnetic sensor in this application, in the scheme where the magnetic pole distribution direction of the magnet is parallel to the first direction, no matter where the magnet moves relative to the magnetic sensor along the first direction, the direction of the magnetic field generated by the magnet at the magnetic sensor is always perpendicular to the direction of the magnetic field that the second sensing unit can detect. Therefore, under ideal conditions (ignoring the slight differences of each device within the acceptable quality range and the normal error of the relative installation position, etc.), the magnetic field (non-environmental) that the second sensing unit can detect from the magnet is... The magnetic field is always kept close to 0 (or 0 if the error is ignored). If the magnetic field strength detected by the second sensing unit deviates significantly from the normal range close to 0, it indicates that an environmental magnetic field exists. It can be seen that the above-mentioned improvement of the airflow detection component in this application enables the second sensing unit to be used exclusively for detecting environmental magnetic fields. This creates the basic conditions for simpler, more efficient and sensitive identification of environmental magnetic field interference, making it possible to identify environmental magnetic field interference in a simpler, more efficient and sensitive way (for example, it is only necessary to determine the presence of environmental magnetic field interference when the detection value of the second sensing unit is greater than a certain threshold, without the need for complex calculations).

[0006] Similarly, in the scheme where the magnetic poles of the magnet are perpendicular to the first direction, regardless of the position of the magnet relative to the magnetic sensor along the first direction, the direction of the magnetic field generated by the magnet at the magnetic sensor is always perpendicular to the direction of the magnetic field that the first sensing unit can detect. Therefore, theoretically, the magnetic field (non-ambient magnetic field) from the magnet that the first sensing unit can detect is always kept close to 0 (or 0 if the error is ignored). This allows the first sensing unit to be used exclusively for detecting ambient magnetic fields. This also creates the basic conditions for simpler, more efficient, and more sensitive identification of ambient magnetic field interference, making it possible to identify ambient magnetic field interference in a simpler, more efficient, and more sensitive way.

[0007] Furthermore, in the scheme where the magnetic pole distribution direction of the magnet is parallel to the first direction, the direction of the magnetic field generated by the magnet at the magnetic sensor is parallel to the direction of the magnetic field that the first sensing unit can detect. This allows the magnetic field generated by the magnet at the magnetic sensor to be concentratedly detected by the first sensing unit, which is beneficial to improving the magnetic field strength from the magnet that the first sensing unit can detect. This is beneficial to more accurately detect the movement / position of the magnet and more accurately identify the user's suction action.

[0008] Furthermore, the magnetic field strength detected by the magnetic sensor of this application decreases monotonically as the distance between the magnet and the magnetic sensor gradually increases, and increases monotonically as the distance between them gradually decreases. This is also beneficial for accurately detecting the movement / position of the magnet and identifying the user's suction action based on the magnetic field signal detected by the magnetic sensor.

[0009] Furthermore, the magnetic sensor is a multi-axis magnetic sensing chip, and the first sensing unit and the second sensing unit are located on the same multi-axis magnetic sensing chip.

[0010] As can be seen from the above, this arrangement has several advantages. First, it allows the first and second sensing units to be placed closer together, facilitating their alignment with the center of the magnet. This ensures that the magnetic field detected by the sensing unit for detecting the ambient magnetic field approaches zero, and that the magnetic field detected by the sensing unit for detecting the magnet's magnetic field changes monotonically as the distance between them increases / decreases. Second, it reduces installation errors and simplifies installation. Furthermore, using a multi-axis magnetic sensing chip (biaxial or triaxial) improves integration and simplifies the structure of the airflow detection component.

[0011] Furthermore, the magnetic sensor also includes a third sensing unit, which is used to sense a magnetic field parallel to a third direction, wherein the first direction, the second direction, and the third direction are mutually perpendicular.

[0012] As can be seen from the above, in the scheme where the magnetic pole distribution direction of the magnet is parallel to the first direction, the magnetic field directions that the second and third sensing units can detect are both perpendicular to the magnetic field direction generated by the magnet at the magnetic sensor. In the absence of environmental magnetic field interference, the magnetic field strength detected by the second and third sensing units approaches 0. This addition of sensing units for detecting environmental magnetic fields in different directions facilitates more accurate identification of environmental magnetic field interference (enabling the identification of environmental magnetic fields parallel to the third direction). In the scheme where the magnetic pole distribution direction of the magnet is perpendicular to the first direction, regardless of the angle between the magnetic pole distribution direction and the second direction, the magnetic field strength generated by the magnet at the magnetic sensor can be detected jointly by the second and third sensing units.

[0013] Furthermore, the magnetic sensor is a triaxial magnetic sensing chip, and the first sensing unit, the second sensing unit, and the third sensing unit are located on the same triaxial magnetic sensing chip.

[0014] Furthermore, the pneumatic membrane is hydrophobic and / or oleophobic.

[0015] As can be seen from the above, during long-term use of electronic cigarettes, moisture and e-liquid inevitably accumulate in the airflow path. If moisture and e-liquid adhere to the pneumatic diaphragm, it can easily alter the deformation pattern of the diaphragm, potentially causing the inhalation action to be undetectable. Therefore, the pneumatic diaphragm is hydrophobic and / or oleophobic, ensuring that very little or no water or oil adheres to it in the airflow path. This makes the deformation of the pneumatic diaphragm relatively stable during long-term use, resulting in a relatively stable displacement trajectory of the magnet. This improves the accuracy of the magnetic sensor's detection of changes in the magnet's magnetic field.

[0016] Furthermore, the pneumatic membrane includes an elastic membrane body and a coating, the coating being applied to the surface of the elastic membrane body and exposed in the suction air passage, the coating being a hydrophobic coating and / or an oleophobic coating.

[0017] To make the pneumatic membrane hydrophobic and / or oleophobic, a hydrophobic and / or oleophobic coating is applied to the elastic membrane to form a hydrophobic coating and / or oleophobic coating, which makes the manufacturing process more convenient.

[0018] Furthermore, the pneumatic diaphragm is an oil-blocking diaphragm and / or a water-blocking diaphragm, and the magnetic sensor is isolated from the suction air path by the pneumatic diaphragm.

[0019] When the magnetic sensor is isolated from the suction air path only by a pneumatic membrane, the pneumatic membrane is selected to be an oil-blocking membrane and / or a water-blocking membrane that does not allow water or oil to pass through. This isolates the magnetic sensor from the suction air path by the pneumatic membrane, preventing the magnetic sensor from being affected by water vapor or soot, which could weaken its magnetic field detection capability or even cause it to malfunction.

[0020] Furthermore, the substrate has a cavity, and the pneumatic membrane divides the cavity into a first cavity and a second cavity. The first cavity is used to communicate with the suction air path, and the magnetic sensor is fixed in the second cavity.

[0021] Furthermore, the second cavity is a sealed cavity. This isolates the magnetic sensor located in the second cavity from the suction air path, better ensuring that the magnetic sensor is not contaminated by moisture, grease, or other substances.

[0022] Furthermore, the outer contour of the pneumatic diaphragm is circular or a regular polygon, and the magnet is fixed at the geometric center of the pneumatic diaphragm. This regular shape not only facilitates manufacturing and processing but also ensures that the positional trajectory of the geometric center of the pneumatic diaphragm tends to be linear during deformation (convex or concave). Therefore, it ensures that the displacement trajectory of the magnet during the deformation process of the pneumatic diaphragm is closer to a straight line, and the magnetic field generated by the magnet changes more regularly and stably.

[0023] Furthermore, when the electronic cigarette is in an idle state, the pneumatic membrane remains in a defined first shape under its own elastic force, or returns to the first shape under its own elastic force.

[0024] The idle state refers to the period when the user is not using the electronic cigarette, during which the air pressure in the inhalation path changes minimally. The pneumatic diaphragm has sufficient elastic recovery capability to maintain a defined first shape, ensuring that the magnet on it returns to its correct position accurately, and also enabling the magnetic sensor to accurately detect the magnetic field strength generated by the magnet when the pneumatic diaphragm is in the first shape.

[0025] Furthermore, when a user inhales the e-cigarette, the pneumatic membrane deforms under the pressure of the airflow and remains in a defined second shape. This facilitates more accurate detection of the user's inhalation of the e-cigarette.

[0026] This application also provides an electronic cigarette, including an atomizing device and the aforementioned airflow detection component. The atomizing device is located in the inhalation air path, and the magnetic sensor is electrically connected to the atomizing device. The electronic cigarette thus possesses the hardware foundation for achieving anti-magnetic interference and preventing accidental triggering of the atomizing device. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the airflow detection component in an embodiment of this application; Figure 2 This is a schematic diagram of one of the magnetic pole distribution patterns of the magnet in an embodiment of this application; Figure 3 This is a schematic diagram of the second magnetic pole distribution pattern of the magnet in the embodiment of this application; Figure 4 This is a schematic diagram of the magnetic pole distribution pattern three of the magnets in the embodiments of this application; Figure 5 This is a schematic diagram of the pneumatic membrane in a first state in an embodiment of this application; Figure 6 This is a schematic diagram of the pneumatic membrane in a second state in an embodiment of this application; Figure 7 This is a schematic diagram of the structure of the electronic cigarette in the embodiments of this application; The reference numerals in the attached figures refer to the following: 1. Substrate, 2. Magnetic sensor, 3. Magnet, 4. Pneumatic membrane, 5. Suction air path, 6. Atomizing device. Detailed Implementation

[0028] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0029] It should be noted that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0030] Figures 2-4 All use a unified spatial rectangular coordinate system, where the first direction is along the Z-axis, the second direction is along the X-axis, and the third direction is along the Y-axis.

[0031] In one embodiment, such as Figure 1 and Figure 2As shown, this embodiment provides an airflow detection component for electronic cigarettes, including a substrate 1, an aerodynamic membrane 5, a magnet 3, and a magnetic sensor 2. The aerodynamic membrane 5 is connected to the substrate 1 and is located in the inhalation airflow path 5 of the electronic cigarette during use, and can undergo elastic deformation in response to changes in air pressure in the inhalation airflow path 5. The inhalation airflow path 5 refers to the passage through which airflow passes in the electronic cigarette when the user performs an inhalation action. The magnet 3 is fixed on the aerodynamic membrane 5 and can move under the drive of the aerodynamic membrane 5, with the movement direction of the magnet 3 along a first direction. The magnetic sensor 2 is fixed on the substrate 1 and is directly opposite the magnet 3 along the first direction. The magnetic sensor 2 includes a first sensing unit and a second sensing unit. The first sensing unit is used to sense a magnetic field parallel to the first direction, and the second sensing unit is used to sense a magnetic field parallel to a second direction, which is perpendicular to the first direction. The accuracy of the magnetic sensor 2 in detecting the ambient magnetic field depends on the arrangement of the magnetic poles of the magnet 3 and the relative position of the magnet 3 and the magnetic sensor 2. By rationally arranging the magnet 3 and the magnetic sensor 2, complex calculations for the detected magnetic field can be avoided, thereby improving the accuracy and efficiency of identifying interfering magnetic fields in the environment. In an environment without magnetic interference, when the magnet 3 is directly facing the first direction and the magnetic pole distribution direction of the magnet 3 is parallel or perpendicular to the first direction, the magnetic field detected by its sensing unit for identifying the environmental magnetic field is extremely small or even close to zero. With this setup, determining the presence of interfering magnetic fields does not require complex calculations of the identified environmental magnetic field, making it more accurate, faster, and more sensitive.

[0032] In one embodiment, such as Figure 2As shown, the magnetic pole distribution direction of magnet 3 is parallel to the first direction. The first sensing unit is used to sense the magnetic field generated by magnet 3, and the second sensing unit is mainly used to sense the ambient magnetic field. Through coordinated improvements to the relative position / motion relationship between magnetic sensor 2 and magnet 3, the magnetic pole distribution direction of magnet 3, and the sensing direction of magnetic sensor 2, in order to detect a stronger magnetic field intensity from magnet 3, magnetic sensor 2 is positioned directly opposite magnet 3 along the first direction, with the magnetic pole distribution direction of magnet 3 parallel to the first direction. The first sensing unit is used to sense the magnetic field generated by magnet 3, and the second sensing unit is mainly used to sense the ambient magnetic field. When the relative position of magnet 3 and magnetic sensor 2 changes, the first sensing unit detects a corresponding change in the magnetic field (non-ambient magnetic field) from magnet 3. The magnetic field intensity detected by the first sensing unit decreases monotonically as the distance between them gradually increases and increases monotonically as the distance between them decreases. Meanwhile, the magnetic field (non-ambient magnetic field) from magnet 3 that the second sensing unit can detect approaches 0 (or 0 if error is ignored). Based on this regularity, it can be seen that the above-mentioned improvements to the airflow detection component in this application make it possible for the airflow detection component to detect environmental magnetic field interference more efficiently and sensitively. For example, when the detection value of the second sensing unit is greater than a certain threshold (such as 10mT), the magnetic sensor 2 can be used to determine that there is environmental magnetic field interference. This makes the calculation of identifying environmental magnetic field interference simple, which is conducive to the accurate and efficient identification of magnetic interference and improves the accuracy of airflow detection.

[0033] In this embodiment, as the magnet 3 moves, the magnetic field change detected by the magnetic sensor 2 is large (more magnetic field lines pass through the magnetic sensor 2), which helps to improve the accuracy of the displacement judgment of the magnet 3, and thus improves the accuracy of the deformation state judgment of the pneumatic membrane 5. Due to errors in the installation of various components in the electronic cigarette, the second magnetic sensing unit may sense a small amount of magnetic field generated by the magnet 3, and the first sensing unit may also sense an ambient magnetic field, but the magnetic field generated by the magnet 3 is mainly sensed by the first sensing unit.

[0034] In one embodiment, such as Figure 3 As shown, the magnetic poles of magnet 3 are distributed perpendicular to the first direction. The first sensing unit is mainly used to sense the ambient magnetic field, and the second sensing unit is used to sense the magnetic field generated by magnet 3. In this embodiment, due to installation errors, the first magnetic sensing unit may sense a small amount of magnetic field generated by magnet 3, and the second sensing unit may also sense some ambient magnetic field, but the magnetic field generated by magnet 3 is mainly sensed by the second sensing unit.

[0035] Preferably, the magnetic sensor 2 employs a multi-axis magnetic sensing chip, with the first sensing unit and the second sensing unit located on the same multi-axis magnetic sensing chip. The sensing units on the same magnetic sensing chip are more spatially compact. This improves the accuracy of sensing the magnetic field, especially the magnetic field generated by the magnet 3 directly opposite the magnetic sensor 2. Furthermore, the information processing capabilities of the magnetic sensing chip can be utilized, providing a hardware foundation for judging and identifying interfering magnetic fields.

[0036] In one embodiment, such as Figure 4 As shown, the magnetic pole distribution direction of magnet 3 is perpendicular to the plane of the paper, and the magnetic field generated by magnet 3 is perpendicular to the plane of the paper and inwards, and also perpendicular to the first direction. This design allows the first and second sensing units to be closer together, facilitating their alignment with the center of magnet 3. This ensures that the magnetic field detected by the first sensing unit from magnet 3 approaches zero, and that the magnetic field detected by the second sensing unit changes monotonically as the distance between them increases / decreases. Furthermore, this design reduces installation errors and simplifies installation (firstly, because individual sensing units are small and inconvenient to install, and secondly, because existing two-axis / three-axis magnetic sensors inherently have mutually perpendicular sensing directions). Additionally, it improves integration and simplifies the structure of the airflow detection component.

[0037] In one embodiment, the magnetic sensor 2 includes a first sensing unit, a second sensing unit, and a third sensing unit. The third sensing unit is used to sense a magnetic field parallel to a third direction, wherein the first, second, and third directions are mutually perpendicular. The magnetic pole distribution direction of the magnet 3 is parallel to the first direction, and the magnetic field strengths in the second and third directions are close to zero when the electronic cigarette is in normal use. The magnetic sensor 2 detects the magnetic field components in the first, second, and third directions within its effective sensing range in three-dimensional space, thereby detecting the magnetic field strength in each direction within its effective sensing range. The magnetic pole distribution direction of the magnet 3 is parallel to the first direction, and the magnetic field strengths in each direction on the same plane containing the second and third directions are close to zero when the electronic cigarette is in normal use. The magnetic sensor 2 detects the magnetic field strength in each direction on the plane by detecting the magnetic field strength components in the second and third directions. Compared to magnetic sensors that only have two sensing units to sense magnetic fields in two directions respectively, this embodiment improves the detection of spatial magnetic fields from two-dimensional planar detection to three-dimensional stereoscopic detection. This allows for the detection of interfering magnetic fields in more directions, thereby further enhancing the detection capability of interfering magnetic fields.

[0038] Preferably, the magnetic sensor 2 is a triaxial magnetic sensing chip, with the first sensing unit, the second sensing unit, and the third sensing unit housed within the same triaxial magnetic sensing chip. The sensing units within the same magnetic sensing chip are more spatially compact. This improves the accuracy of the sensed magnetic field, especially the magnetic field generated by the magnet 3 directly opposite the magnetic sensor 2.

[0039] In one embodiment, the pneumatic membrane 5 is hydrophobic and / or oleophobic to achieve water and oil separation. During the use of electronic cigarettes, the adhesion of e-liquid and moisture can easily affect the deformation of the pneumatic membrane 5, causing the magnet 3 to be unable to move normally, and consequently making the magnetic field detected by the magnetic sensor 2 of the magnet 3 inaccurate. To prevent this from happening, the pneumatic membrane 5 can be made of polytetrafluoroethylene (PTFE) to achieve hydrophobic and oleophobic effects, reducing or even eliminating the adhesion of e-liquid and moisture to the surface of the pneumatic membrane 5.

[0040] In one embodiment, the pneumatic membrane 5 includes an elastic membrane body and a coating. The coating is applied to the surface of the elastic membrane body and exposed in the suction air passage 5. The coating is a hydrophobic coating and / or an oleophobic coating. This coating has a nanostructure and uses existing fluorine-modified polyester nanocoating materials. Extremely fine nanoparticles form a nanofilm approximately 2 μm thick on the surface of the elastic membrane body. The hydrophobic and / or oleophobic properties of the coating also enable the pneumatic membrane 5 to achieve hydrophobic and oleophobic effects.

[0041] In one embodiment, the pneumatic diaphragm 5 is an oil-blocking membrane and / or a water-blocking membrane, and the magnetic sensor 2 is isolated from the suction air passage 5 by the pneumatic diaphragm 5. Such oil-blocking and water-blocking membranes have oil- and water-blocking functions. When the magnetic sensor 2 and the suction air passage 5 are only separated by the pneumatic diaphragm 5, the pneumatic diaphragm 5 must be an oil-blocking membrane and / or a water-blocking membrane to effectively isolate the magnetic sensor 2 from the suction air passage 5, preventing the magnetic sensor 2 from being affected by water vapor or e-liquid, which could weaken its magnetic field detection capability or even cause it to malfunction.

[0042] In one embodiment, the substrate 1 has a cavity, and the pneumatic membrane 5 divides the cavity into a first cavity and a second cavity. The first cavity is used to communicate with the suction air path 5, and the magnetic sensor 2 is fixed in the second cavity. Preferably, the second cavity is a sealed cavity. Isolating the magnetic sensor 2 in the second cavity from the suction air path 5 better ensures that the magnetic sensor 2 is not contaminated by moisture, grease, or other substances. The outer contour of the pneumatic membrane 5 is circular or a regular polygon. The magnet 3 is fixed at the geometric center of the pneumatic membrane 5, and the magnetic sensor 2 is directly opposite the magnet 3, facilitating the positioning of both within the substrate 1. This is beneficial for assembly, and accurate positioning ensures assembly precision and also improves the magnetic sensor 2's ability to detect changes in the magnetic field. Furthermore, during use, the displacement trajectory of the magnet 3 during the deformation process of the pneumatic membrane 5 is closer to a straight line, and the magnetic field changes generated by the magnet 3 are more regular, which is beneficial for the magnetic sensor 2 to more accurately sense changes in the magnetic field.

[0043] In one embodiment, the electronic cigarette includes an idle state and an active state, which are mainly distinguished by whether the user performs a puffing action on the electronic cigarette.

[0044] like Figure 5 As shown, when the electronic cigarette is in an idle state, the pneumatic diaphragm 5 maintains a defined first shape under its own elasticity, or returns to its first shape under its own elasticity. The idle state refers to the time when the user is not using the electronic cigarette, during which the air pressure change in the inhalation path 5 is minimal. At this time, the non-deformed or slightly deformed shape of the pneumatic diaphragm 5 can be considered the first shape. The pneumatic diaphragm 5 possesses sufficient elastic recovery capability to maintain a defined first shape, and the magnetic field generated by the magnet 3 on it is also in its first shape. When this first shape is present, the magnetic sensor 2 can detect a relatively clear threshold or set value of the magnetic field, making the magnetic sensor 2's judgment of the pneumatic diaphragm 5's shape more accurate.

[0045] like Figure 6 As shown, when the electronic cigarette is in operation, the pneumatic diaphragm 5 deforms under the pressure of the airflow and maintains a defined second shape. The operating state refers to the period when the user inhales the electronic cigarette, during which the air pressure in the inhalation airway 5 changes significantly. This second shape is the deformation range of the pneumatic diaphragm 5 (the distance between the geometric center of the second shape and the geometric center of the first shape of the pneumatic diaphragm 5 ranges from 0.5mm to 1.5mm). Within this deformation range, the magnetic field strength generated by the magnet 3 on the pneumatic diaphragm 5 can be clearly detected by the magnetic sensor 2. When the user inhales the electronic cigarette, the air pressure generated in the inhalation airway 5 causes the pneumatic diaphragm 5 to deform and maintain a defined second shape, thereby ensuring that the magnet 3 is in a suitable position. When the generated magnetic field is also in its second shape, the magnetic sensor 2 can detect a more precise intensity of the magnetic field, thus making the judgment of the shape of the pneumatic diaphragm 5 more accurate. Therefore, the substrate of the pneumatic diaphragm 5 can be polyethylene, polypropylene, or polycarbonate to ensure that the pneumatic diaphragm 5 can maintain a defined first shape and a defined second shape in the idle and operating states, respectively.

[0046] In one embodiment, such as Figure 1 and Figure 7 As shown, this application also provides an electronic cigarette, including an atomizing device 5 and an airflow detection component. The airflow detection component includes a magnetic sensor 2, a pneumatic diaphragm 5, and a magnet 3. The atomizing device 5 is located on the suction air path 5, and the magnetic sensor 2 is electrically connected to the atomizing device 5. The electronic cigarette employing the airflow detection component in any embodiment of this utility model has the hardware foundation to achieve anti-magnetic interference and prevent false triggering of the atomizing device.

[0047] In summary, the above description is only a preferred embodiment of this application. All equivalent changes and modifications made within the scope of the claims of this application shall fall within the scope of this application.

Claims

1. An airflow detection component for electronic cigarettes, comprising: Matrix; A pneumatic membrane is connected to the substrate and is located in the inhalation air path of the electronic cigarette during use. It can undergo elastic deformation in response to changes in air pressure in the inhalation air path. A magnet is fixed on the pneumatic membrane and can move under the drive of the pneumatic membrane, and the direction of movement of the magnet is along a first direction; A magnetic sensor is fixed to the substrate and is directly opposite the magnet along the first direction; Its features are: The magnetic sensor includes a first sensing unit and a second sensing unit. The first sensing unit is used to sense a magnetic field parallel to the first direction, and the second sensing unit is used to sense a magnetic field parallel to the second direction, which is perpendicular to the first direction. The magnetic pole distribution direction of the magnet is parallel to the first direction, and the first sensing unit is used to sense the magnetic field generated by the magnet. Alternatively, the magnetic pole distribution direction of the magnet is perpendicular to the first direction, and the second sensing unit is used to sense the magnetic field generated by the magnet.

2. The airflow detection component according to claim 1, characterized in that: The magnetic sensor is a multi-axis magnetic sensing chip, and the first sensing unit and the second sensing unit are located on the same multi-axis magnetic sensing chip.

3. The airflow detection component according to claim 1, characterized in that: The magnetic sensor further includes a third sensing unit, which is used to sense a magnetic field parallel to a third direction, wherein the first direction, the second direction, and the third direction are mutually perpendicular.

4. The airflow detection component according to claim 3, characterized in that: The magnetic sensor is a triaxial magnetic sensing chip, and the first sensing unit, the second sensing unit, and the third sensing unit are located on the same triaxial magnetic sensing chip.

5. The airflow detection component according to claim 1, characterized in that: The pneumatic membrane is hydrophobic and / or oleophobic.

6. The airflow detection component according to claim 5, characterized in that: The pneumatic membrane includes an elastic membrane body and a coating. The coating is applied to the surface of the elastic membrane body and exposed in the suction air passage. The coating is a hydrophobic coating and / or an oleophobic coating.

7. The airflow detection component according to claim 1, characterized in that: The pneumatic diaphragm is an oil-blocking diaphragm and / or a water-blocking diaphragm, and the magnetic sensor is isolated from the suction air path by the pneumatic diaphragm.

8. The airflow detection component according to claim 7, characterized in that: The substrate has a cavity, and the pneumatic membrane divides the cavity into a first cavity and a second cavity. The first cavity is used to communicate with the suction air path, and the magnetic sensor is fixed in the second cavity.

9. The airflow detection component according to claim 8, characterized in that: The second cavity is a closed cavity; the outer contour of the pneumatic membrane is circular or a regular polygon, and the magnet is fixed at the geometric center of the pneumatic membrane.

10. The airflow detection component according to any one of claims 1 to 9, characterized in that: When the electronic cigarette is in an idle state, the pneumatic membrane is held in a defined first shape by its own elasticity, or returns to the first shape by its own elasticity.

11. The airflow detection component according to any one of claims 1 to 9, characterized in that: When a user inhales an electronic cigarette, the pneumatic membrane deforms under the pressure of the airflow and remains in a defined second shape.

12. An electronic cigarette, including an atomizing device, characterized in that: It also includes the airflow detection component as described in any one of claims 1 to 11, wherein the atomizing device is located in the suction air path, and the magnetic sensor is electrically connected to the atomizing device.

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