Heating assembly and aerosol generating device

Abstract

The utility model provides a heating assembly and an aerosol generating device. The heating assembly comprises a coil, a heating body, an ultrasonic transceiver, a sound transmission medium and a control module, the coil is used for generating an alternating magnetic field, so that the heating body generates joule heat in the alternating magnetic field; the sound transmission medium is positioned between the heating body and the ultrasonic transceiver; the heating body is provided with at least two ultrasonic reflection areas which are arranged at intervals in the first direction; the coil and the ultrasonic transceiver are electrically connected to the control module. The heating body comprises at least two ultrasonic reflection areas. When the ultrasonic signal reaches the ultrasonic reflection area, the ultrasonic signal is reflected. The control module obtains the sound velocity of the heating body according to the time difference of the received reflection signals and the distance of the ultrasonic reflection area. The corresponding temperature is obtained according to the calibrated sound velocity and temperature comparison table, the output power of the coil is adjusted in real time according to the temperature, and the service life of the coil and the heating body is prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of electronic atomization, and in particular relates to a heating component and an aerosol generating device. Background Art

[0002] Electromagnetic induction heating is a non-contact heating method. Applying this technical principle to aerosol generating devices can effectively avoid problems such as poor contact caused by electrode oxidation and corrosion, as well as unstable resistance of the core heating element caused by different contact strengths between the atomizer assembly and the battery rod, compared with traditional resistive heating. At the same time, due to the non-contact heating characteristics of this technology, some structural parts in some traditional resistive heating aerosol generating devices will be cancelled or reduced in use. Fewer structural parts may reduce the risk of leakage of the aerosol generating matrix in the atomizer assembly, as well as reduce the overall manufacturing cost. Therefore, aerosol generating devices using electromagnetic induction heating have received widespread attention from the market and users in recent times. But on the other hand, it is precisely because of the non-contact heating method of electromagnetic induction heating that conventional temperature measurement methods are difficult to implement, such as thermocouples and resistance temperature coefficient temperature measurement methods. Utility Model Content

[0003] The technical purpose of the utility model is to provide a heating component and an aerosol generating device, aiming to solve the technical problem that the temperature measurement method of the aerosol generating device using electromagnetic induction heating in the related art is difficult to implement.

[0004] To solve the above technical problems, the utility model is implemented as follows: a heating component includes: a coil, a heating element, an ultrasonic transceiver, a sound transmission medium, and a control module; the coil is used to generate an alternating magnetic field so that the heating element generates Joule heat in the alternating magnetic field; the sound transmission medium is located between the heating element and the ultrasonic transceiver; the heating element has at least two ultrasonic reflection areas arranged at intervals along the first direction; the coil and the ultrasonic transceiver are both electrically connected to the control module.

[0005] Furthermore, the ultrasound reflection area is a plane parallel to the second direction, and the first direction and the second direction are orthogonal.

[0006] Further, the heating element includes a heating unit area, the heating unit area has at least two heating areas connected in sequence along the first direction; the connection between two adjacent heating areas has a connecting surface parallel to the second direction; and, when the heating area has a free end and the end surface of the free end is parallel to the second direction, each connecting surface and each end surface is a different ultrasonic reflection area.

[0007] Furthermore, the heating unit area includes two first heating areas arranged at intervals along the first direction, and a second heating area located between the two first heating areas; the connection between the first heating area and the second heating area has a first connecting surface parallel to the second direction, and the first connecting surface is the ultrasonic reflection area.

[0008] Further, in the second direction, the cross-sectional area of ​​the first heating zone is greater than the cross-sectional area of ​​the second heating zone, and the first connecting surface is formed at one end of the first heating zone connected to the second heating zone.

[0009] Furthermore, at least one end of the first heating area away from the second heating area has an end surface parallel to the second direction, and the end surface is the ultrasound reflection area.

[0010] Further, the heating unit area includes a first heating area, a second heating area, a third heating area, a second heating area and a first heating area connected in sequence along the first direction; the connection between the first heating area and the second heating area has a first connecting surface parallel to the second direction; the connection between the second heating area and the third heating area has a second connecting surface parallel to the second direction; the first connecting surface and the second connecting surface are different ultrasonic reflection areas.

[0011] Further, in the second direction, the cross-sectional area of ​​the first heating zone is greater than the cross-sectional area of ​​the second heating zone, and the cross-sectional area of ​​the second heating zone is greater than the cross-sectional area of ​​the third heating zone; the first connecting surface is formed at one end of the first heating zone connected to the second heating zone, and the second connecting surface is formed at one end of the second heating zone connected to the third heating zone.

[0012] Furthermore, at least one end of the first heating area away from the second heating area has an end surface parallel to the second direction, and the end surface is the ultrasound reflection area.

[0013] Furthermore, the heating body also includes a magnetic collection area and a transition area, and at least one end of the heating unit area is connected to the magnetic collection area through the transition area; in the second direction, the planar cross-sectional areas of the magnetic collection area, the transition area, and the heating unit area decrease successively.

[0014] Furthermore, the sound transmission medium includes a solid sound transmission medium, the solid sound transmission medium extends along the first direction, one end of the solid sound transmission medium is in contact with the heating element and the other end of the solid sound transmission medium is in contact with the ultrasonic transceiver.

[0015] Furthermore, the heating body includes two transition zones and two magnetic collection zones arranged at intervals along the first direction; one end of the heating unit zone is connected to one magnetic collection zone through one transition zone; the other end of the heating unit zone is connected to another magnetic collection zone through another transition zone; one of the magnetic collection zones is connected to one end of the solid sound transmission medium away from the ultrasonic transceiver.

[0016] Further, one end of the heating unit area is connected to the magnetic collection area through a transition area, and the other end of the heating unit area is connected to an end of the solid sound transmission medium away from the ultrasonic transceiver;

[0017] Alternatively, one end of the heating unit area is connected to the magnetic collection area through the transition area, and one end of the magnetic collection area away from the transition area is connected to one end of the solid sound transmission medium away from the ultrasonic transceiver.

[0018] Furthermore, the magnetic collection area extends along the second direction; the heating element includes a plurality of heating unit areas arranged at intervals along the second direction, and each heating unit area is connected to the magnetic collection area through the corresponding transition area.

[0019] Furthermore, the control module includes a circuit board mounted on an end of the ultrasonic transceiver away from the solid sound transmission medium, the coil and the ultrasonic transceiver are electrically connected to the circuit board, the circuit board is integrated with a microprocessor, and the microprocessor is used to send electrical pulse signals to the ultrasonic transceiver and also to receive electrical signals sent by the ultrasonic transceiver.

[0020] Furthermore, an aerosol generating device comprises the heating assembly as described above.

[0021] Compared with the related art, the heating assembly and aerosol generating device in the utility model have the following beneficial effects:

[0022] In the utility model, the heating component is applied to the aerosol generating device. When the device is working, the control module can send an electric pulse signal to the ultrasonic transceiver; after the ultrasonic transceiver receives the electric signal, it can send an ultrasonic signal to the heating element; and the sound transmission medium located between the ultrasonic transceiver and the heating element can be used as a medium for signal propagation; the ultrasonic signal will reach the heating element after passing through the sound transmission medium. Since the heating element includes at least two ultrasonic reflection areas. Therefore, when the ultrasonic signal reaches the ultrasonic reflection area, the ultrasonic signal will be reflected by the ultrasonic reflection area. For example, when the heating element has two ultrasonic reflection areas, part of the ultrasonic signal first passes through the first ultrasonic reflection area and is reflected by the first ultrasonic reflection area; and part of the ultrasonic signal continues to be transmitted, and when passing through the second ultrasonic reflection area, it is reflected by the second ultrasonic reflection area. The reflected ultrasonic signal reaches the ultrasonic transceiver successively after passing through the sound transmission medium, and the ultrasonic transceiver sends an electric signal to the control module successively. Since the time when the two ultrasonic signals are reflected is different, the time when the ultrasonic transceiver receives the reflected ultrasonic signal is different, and the time when the control module receives the electric signal sent by the ultrasonic transceiver is also different. Since the two ultrasonic reflection areas are spaced at a certain distance, the control module can obtain the sound velocity of the heating element according to the time difference between the two reflected signals and the distance between the two ultrasonic reflection areas. Finally, the control module can obtain the corresponding temperature according to the calibrated sound velocity and temperature comparison table, and thus obtain the temperature of the part of the heating element located between the two ultrasonic emission structures. Thus, the control module can adjust the output power of the coil in real time according to the temperature, ensure the heating quality, and improve the service life of the coil and the heating element. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For those skilled in the art, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 It is a partial structural schematic diagram of an aerosol generating device in an embodiment of the utility model;

[0025] Figure 2 It is a schematic diagram of the structure of the heating element in the embodiment of the utility model;

[0026] Figure 3 This is a schematic diagram of the temperature measurement principle.

[0027] In the accompanying drawings, each figure mark represents: 1. heating element; 11. first heating zone; 12. second heating zone; 13. transition zone; 14. magnetic collecting zone; 15. supporting part; 2. coil; 3. ultrasonic transceiver; 4. sound transmission medium; 5. circuit board; 6. battery; 10. ultrasonic reflection zone. DETAILED DESCRIPTION

[0028] The embodiments of the utility model are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the utility model, and cannot be understood as limiting the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the utility model.

[0029] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "circumferential", "radial" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0030] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0031] See also Figure 1-2 The embodiment of the utility model provides a heating component, a heating component comprising: a coil 2, a heating element 1, an ultrasonic transceiver 3, a sound transmission medium 4, and a control module; the coil 2 is used to generate an alternating magnetic field so that the heating element 1 generates Joule heat in the alternating magnetic field; the sound transmission medium 4 is located between the heating element 1 and the ultrasonic transceiver 3; the heating element 1 has at least two ultrasonic reflection areas 10 arranged at intervals along a first direction; the coil 2 and the ultrasonic transceiver 3 are both electrically connected to the control module.

[0032] Specifically, the heating element 1 is made of a material with high relative magnetic permeability, low resistivity, and high saturation magnetization intensity, and can be made of a single material or a composite of multiple materials. The coil 2 generates a high-frequency alternating magnetic field under the control of the control module, and the heating element 1 is located in the alternating magnetic field, thereby realizing electromagnetic induction heating.

[0033] In the utility model, the heating component is applied to the aerosol generating device. When the device is working, the control module can send an electric pulse signal to the ultrasonic transceiver 3; after receiving the electric signal, the ultrasonic transceiver 3 can send an ultrasonic signal to the heating element 1; and the sound transmission medium 4 connected between the ultrasonic transceiver 3 and the heating element 1 can be used as a medium for signal propagation; the ultrasonic signal will reach the heating element 1 after passing through the sound transmission medium 4. Since the heating element 1 includes at least two ultrasonic reflection areas 10. Therefore, when the ultrasonic signal reaches the ultrasonic reflection area 10, the ultrasonic signal will be reflected by the ultrasonic reflection area 10. For example, when the heating element 1 has two ultrasonic reflection areas 10, part of the ultrasonic signal first passes through the first ultrasonic reflection area 10 and is reflected by the first ultrasonic reflection area 10; and part of the ultrasonic signal continues to be transmitted, and when passing through the second ultrasonic reflection area 10, it is reflected by the second ultrasonic reflection area 10. The reflected ultrasonic signal reaches the ultrasonic transceiver 3 after passing through the sound transmission medium 4, and the ultrasonic transceiver 3 sends an electric signal to the control module. Since the two ultrasonic signals are reflected at different times, the ultrasonic transceiver 3 receives the reflected ultrasonic signal at different times, and the control module receives the electrical signal sent by the ultrasonic transceiver 3 at different times. Since the two ultrasonic reflection areas 10 have a certain interval, the control module can obtain the sound velocity of the heating element 1 according to the time difference between the two reflected signals and the distance between the two ultrasonic reflection areas 10. Finally, the control module can obtain the corresponding temperature according to the calibrated sound velocity and temperature comparison table, and can obtain the temperature of the part of the structure located between the two ultrasonic emission structures in the heating element 1, so that the control module can adjust the output power of the coil 2 in real time according to the temperature, ensure the heating quality, and improve the service life of the coil 2 and the heating element 1.

[0034] In addition, for the transmission process of the ultrasonic signal in the heating element 1, only the case where the heating element 1 includes two ultrasonic reflection areas 10 is listed here. In the actual process, the heating element 1 can be provided with three, four, etc. ultrasonic reflection areas 10, and the reflected signals reflected back by each ultrasonic reflection area 10 can also be collected, and the temperature of the part of the heating element 1 between every two ultrasonic reflection areas 10 can also be measured in real time. It is worth noting that when the control module can measure the temperature of the heating element 1 in more than two different areas, the control module also needs to identify which ultrasonic reflection areas 10 the received reflected signal comes from, so that the temperature can be matched to the heating element 1 in the area between the two ultrasonic reflection areas 10.

[0035] Furthermore, the ultrasound reflection area 10 is a plane parallel to the second direction, and the first direction and the second direction are orthogonal.

[0036] When the ultrasonic signal is transmitted on the heating element 1, if the heating element 1 is a rectangular parallelepiped / cylindrical / rectangular structure parallel to the first direction, the ultrasonic signal will only be reflected at the free end (edge) of the heating element 1; and the heating element 1 in this embodiment has multiple structures that can reflect the ultrasonic signal, such as a plane parallel to the second direction, or a curved surface or plane that has an angle relationship with the second direction but is not orthogonal, etc., but among them, the intensity of the ultrasonic signal reflected back by the plane parallel to the second direction is much greater than the intensity of the ultrasonic signal reflected back by other surfaces, and the signal reflected back by the surface not parallel to the second direction is difficult to separate because it will be mixed with other clutter, and thus will be filtered by the control module. Therefore, in the utility model, only the signal reflected back by the ultrasonic reflection area 10, that is, only the signal reflected back by the plane parallel to the second direction, will be used by the control module for calculation to obtain the speed of sound, etc.

[0037] Furthermore, the heating body 1 includes a heating unit area, the heating unit area has at least two heating areas connected in sequence along a first direction; the connection between two adjacent heating areas has a connecting surface parallel to the second direction; and, when the heating area has a free end and the end surface of the free end is parallel to the second direction, each connecting surface and each end surface is a different ultrasonic reflection area 10.

[0038] In this embodiment, the heating unit area has at least two heating areas connected in sequence along the first direction. For example, when the heating unit area only includes two heating areas connected in sequence along the first direction, and the areas of the end surfaces at the connection of the two heating areas are different, the connection has a connection surface, and the connection surface is parallel to the second direction; at the same time, one of the heating areas has a free end, and the free end has an end surface parallel to the second direction. Then the connection surface and the end surface can be used as different ultrasonic reflection areas 10. The ultrasonic signal first passes through the first heating area connected to the sound transmission medium 4. When the ultrasonic signal is transmitted to the connection surface at the connection of the two heating areas, part of the ultrasonic signal will be reflected on this connection surface, and the reflected signal will be transmitted back to the ultrasonic transceiver 3 through the sound transmission medium 4; in addition, part of the ultrasonic signal will continue to be transmitted to the second heating area. At the same time, when the ultrasonic signal reaches the end surface of the free end of the second heating area (the edge of the heating element 1), the ultrasonic signal will also be reflected, and the reflected signal will also be transmitted back to the ultrasonic transceiver 3 through the sound transmission medium 4. That is, the ultrasonic transceiver 3 and the control module can receive two reflected signals at different times, so that the control module can calculate the propagation speed of the ultrasonic signal in the second heating area based on the time difference between the two reflected signals and the distance between the connecting surface and the end surface.

[0039] Furthermore, when the heating zone is a columnar structure or a square structure, the end surface area of ​​the heating zone is different, indicating that the cross-sectional area of ​​the two heating zones in the second direction is different, that is, the sizes of the two heating zones are different, and based on the fact that the heating element 1 has a high magnetic permeability, different heating zones can have different magnetic fluxes, so that the heating zone with a smaller cross-sectional area in the second direction can generate a higher temperature under the action of the high-frequency magnetic field, and produce an efficient heating effect in the heating zone. That is, the heating element 1 adopts a temperature gradient distribution method, so that the heating element 1 can generate heat more efficiently.

[0040] In addition, in the actual process, there may be multiple different heating areas connected in sequence, and the plane parallel to the second direction may be used as the ultrasonic reflection area 10, and the control module may also collect the reflected signals reflected back by each ultrasonic reflection area 10, and may also measure in real time the temperature of the heating area between each two reflected ultrasonic reflection areas 10. It is worth noting that when the control module can measure the temperature of multiple heating areas, the control module may also identify different points.

[0041] Furthermore, in some embodiments, the heating unit area includes two first heating areas 11 arranged at intervals along a first direction, and a second heating area 12 located between the two first heating areas 11; the connection between the first heating area 11 and the second heating area 12 has a first connecting surface parallel to the second direction, and the first connecting surface is an ultrasonic reflection area 10.

[0042] Specifically, the heating unit area includes three heating areas, of which the first and last heating areas are the same, and the middle heating area is different. The ultrasonic signal first passes through the first heating area 11 at the bottom. When the ultrasonic signal is transmitted to the first connecting surface at the connection between the first heating area 11 and the second heating area 12, this first connecting surface serves as the first ultrasonic reflection area 10, and part of the ultrasonic signal will be reflected on this first connecting surface, and the reflected signal will transmit the sound transmission medium 4 back to the ultrasonic transceiver 3; and part of the ultrasonic signal will continue to be transmitted in the second heating area 12. When the ultrasonic signal is transmitted to the first connecting surface at the connection between the second heating area 12 and the first heating area 11 at the top, this first connecting surface serves as the second ultrasonic reflection area 10, and a reflected signal can also be generated on the first connecting surface; at this time, the control module can receive two reflected signals, and the control module can calculate the real-time temperature of the second heating area 12 (the second heating area 12 is located between the first ultrasonic reflection area 10 and the second ultrasonic reflection area 10) according to the time difference between the two reflected signals.

[0043] Further, in the second direction, the cross-sectional area of ​​the first heating area 11 is greater than the cross-sectional area of ​​the second heating area 12 , and the first connecting surface is formed at one end where the first heating area 11 is connected to the second heating area 12 .

[0044] Specifically, the heating zone can be mainly a columnar structure or a square structure. Since the cross-sectional area of ​​the first heating zone 11 is larger than the cross-sectional area of ​​the second heating zone 12, when the first heating zone 11 and the second heating zone 12 are connected, the first heating zone 11 will cover the second heating zone 12 at the connection between the two. Therefore, the first connection surface will be the part of the end of the first heating zone 11 that does not cover the second heating zone 12, and the ultrasonic signal will be emitted in this part. Since the second heating zone 12 is located between the two first heating zones 11, and the ultrasonic reflection zone is the end of the two first heating zones 11 connected to the second heating zone 12, the control module can receive the signals reflected from the top and bottom of the second heating zone 12, so that the real-time temperature of the second heating zone 12 can be finally obtained.

[0045] Furthermore, in some embodiments, at least one end of the first heating area 11 away from the second heating area 12 has an end surface parallel to the second direction, and the end surface is an ultrasonic reflection area.

[0046] Specifically, among the two first heating zones 11, if only the top first heating zone 11 has a free end (not connected to other structures), and the end face of the free end is parallel to the second direction, then the end face of the free end is the third ultrasonic reflection zone 10, and the control module can also receive the ultrasonic signal reflected back by the end face of the free end of the first heating zone 11. Since there is a second ultrasonic reflection zone 10 at the end of the first heating zone 11 connected to the second heating zone 12, the control module can receive the signal reflected back from the top and bottom of the first heating zone 11, and finally obtain the real-time temperature of the first heating zone 11. If both first heating zones 11 have free ends, and the end faces of the free ends are parallel to the second direction, the real-time temperatures of the two first heating zones 11 can also be obtained, which will not be repeated here. Since the control module can not only receive the reflected signals from the top and bottom of the second heating zone, but also receive the reflected signals from other positions, the control module will also identify which different ultrasonic reflection zones 10 the different reflected signals pass through, thereby determining the real-time temperatures of different heating zones.

[0047] In some embodiments, both first heating areas 11 do not have a free end, or the free ends are not planes parallel to the second direction, and the reflected signal will be filtered, and only the temperature of the second heating area 12 will be measured.

[0048] Furthermore, the heating unit area includes a first heating area 11, a second heating area 12, a third heating area, a second heating area 12 and a first heating area 11 connected in sequence along a first direction; the connection between the first heating area 11 and the second heating area 12 has a first connecting surface parallel to the second direction; the connection between the second heating area 12 and the third heating area has a second connecting surface parallel to the second direction, and the first connecting surface and the second connecting surface are different ultrasonic reflection areas.

[0049] Specifically, the heating unit area includes five heating areas in total, and the heating unit areas present a symmetrical effect in the first direction. On the one hand, the temperature of each heating area can also be measured; on the other hand, the heating unit area can also present a temperature gradient distribution, and has an efficient heating effect, which will not be elaborated here.

[0050] Further, in some embodiments, in the second direction, the cross-sectional area of ​​the first heating zone 11 is greater than the cross-sectional area of ​​the second heating zone 12, and the cross-sectional area of ​​the second heating zone 12 is greater than the cross-sectional area of ​​the third heating zone 13; the first connecting surface is formed at one end of the first heating zone 11 connected to the second heating zone, and the second connecting surface is formed at one end of the second heating zone 12 connected to the third heating zone.

[0051] Specifically, there are two first connection surfaces, and one of the first connection surfaces is formed at the end where one of the first heating zones 11 is connected to the second heating zone 12, and the other second connection surface is formed at the end where the other first heating zone 11 is connected to the second heating zone 12. At the same time, there are two second connection surfaces, and one of the second connection surfaces is formed at the end where one of the second heating zones 12 is connected to the third heating zone 13, and the other second connection surface is formed at the end where the other second heating zone 12 is connected to the third heating zone 13. The ultrasonic signal will reflect the signal at the two first connection surfaces and the two second connection surfaces, and the time of reflection is different, so that the real-time temperature of the two second heating zones and the third heating zone can be finally obtained.

[0052] Further, in some embodiments, at least one end of the first heating zone 11 away from the second heating zone 12 has an end surface parallel to the second direction, and the end surface is the ultrasonic reflection zone 10. Similarly, the control module can receive the signal reflected back by the free end surface of the top first heating zone 11, so as to calculate the real-time temperature of the top first heating zone 11; or can receive the signal reflected back by the free end surfaces of the two first heating zones 11, so as to calculate the real-time temperatures of the two first heating zones 11.

[0053] Furthermore, the heating body 1 also includes a magnetic collection area 14 and a transition area 13. At least one end of the heating unit area is connected to the magnetic collection area 14 through the transition area 13. In the second direction, the cross-sectional areas of the magnetic collection area 14, the transition area 13, and the heating unit area decrease successively.

[0054] In some embodiments, the heating element 1 may include a magnetic collection area 14 and a transition area 13 in addition to the heating unit area. Specifically, in some embodiments, the heating element 1 includes a heating unit area, a transition area 13, and a magnetic collection area 14 in sequence. Since the cross-sectional areas of the magnetic collection area 14, the transition area 13, and the heating unit area decrease in sequence in the second direction, that is, the cross-sectional area of ​​the magnetic collection area 14 at the free end of the heating element 1 is the largest, the heating element 1 will receive the most magnetic lines of force in the magnetic collection area 14, and the magnetic lines of force will reach the heating unit area through the transition area 13. Based on the fact that the heating element 1 has a higher relative magnetic permeability, the magnetic line density of the heating unit area will be greatly enhanced at this time, and the heating unit area will generate a higher temperature under the action of the high-frequency magnetic field.

[0055] It should be understood that the transition zone 13 connects the magnetic collection zone 14 and the heating unit zone, and the cross-sectional area of ​​the transition zone 13 in the second direction is gradually changing, and the area of ​​the end surface where the transition zone 13 is connected to the heating unit zone is the same, and the area of ​​the end surface where the transition zone 13 is connected to the magnetic collection zone 14 is also the same, so that the magnetic collection zone 14 and the heating unit zone can be smoothly transitioned. In addition, although the cross-sectional area of ​​the transition zone 13 in the second direction changes, because it is gradually changing, although the signal will be reflected when it is transmitted, because the side of the transition zone 13 is not parallel to the second direction, the signals reflected back at these reflection points are mixed with clutter signals and will be filtered out.

[0056] Furthermore, in some embodiments, the sound transmission medium 4 includes a solid sound transmission medium 4 , the solid sound transmission medium 4 extends along the first direction, one end of the solid sound transmission medium 4 is in contact with the heating element 1 and the other end of the solid sound transmission medium 4 is in contact with the ultrasonic transceiver 3 .

[0057] Specifically, the solid sound medium 4 can be a structural component of a conventional atomizing assembly, such as a part of a base, a part of a bracket, etc., that is, this embodiment does not need to add additional specific components, and can transmit sound waves by relying on the structural components of the conventional atomizing assembly. The solid sound medium 4 has a faster signal propagation speed than the air sound medium. In some embodiments, the sound medium 4 can be an air sound medium 4.

[0058] Furthermore, in some embodiments, the heating body 1 includes two transition zones 13 and two magnetic collection zones 14 arranged at intervals along the first direction; one end of the heating unit zone is connected to a magnetic collection zone 14 through a transition zone 13; the other end of the heating unit zone is connected to another magnetic collection zone 14 through another transition zone 13; wherein one magnetic collection zone 14 is connected to one end of the solid sound transmission medium 4 away from the ultrasonic transceiver 3.

[0059] Specifically, both ends of the heating element 1 are magnetic collection areas 14, and at one end where the two magnetic collection areas 14 are close to each other, the two magnetic collection areas 14 are connected to a transition area 13, and the heating unit area is in the middle. In the first direction, the heating element 1 is sequentially connected with the magnetic collection area 14, the transition area 13, the heating unit area, the transition area 13, and the magnetic collection area 14. In the second direction, the cross-sectional area of ​​the magnetic collection areas 14 at both ends is the largest. At this time, the heating element 1 will superimpose the magnetic lines of force received by the two magnetic collection areas 14, so that the total magnetic lines of force received by the heating element 1 will be more. The magnetic lines of force received at both ends will continue to pass through the transition area 13, and then reach the heating unit area from the transition area 13. Based on the fact that the heating element 1 has a higher relative magnetic permeability, the magnetic line density of the heating unit area in the middle will be greatly enhanced, and the heating unit area will generate a higher temperature under the action of the high-frequency magnetic field.

[0060] Further, in some embodiments, one end of the heating unit area is connected to the magnetic collection area 14 through the transition area 13, and the other end of the heating unit area is connected to the end of the solid sound medium 4 away from the ultrasonic transceiver 3. Specifically, in the first direction, the heating assembly includes the ultrasonic transceiver 3, the solid sound medium 4, the heating unit area of ​​the heating element, the transition area 13 and the magnetic collection area 14 in sequence, and the ultrasonic signal is directly transmitted to each heating area of ​​the heating unit area through the solid sound medium 4. The cross-sectional area of ​​the magnetic collection area 14 is the largest, so the magnetic collection area 14 can receive a large amount of magnetic lines of force, and the magnetic lines of force pass through the transition area 13 to reach the heating unit area. Based on the fact that the heating element 1 has a high relative magnetic permeability, the magnetic line density of the heating unit area in the middle will be greatly enhanced at this time, and the heating unit area will generate a higher temperature under the action of the high-frequency magnetic field.

[0061] In some embodiments, one end of the heating unit area is connected to the magnetic collection area through the transition area, and the end of the magnetic collection area away from the transition area is connected to the end of the solid sound transmission medium away from the ultrasonic transceiver. Specifically, in the first direction, the heating assembly includes an ultrasonic transceiver 3, a solid sound transmission medium 4, a magnetic collection area 14 of the heating element, a transition area 13 and a heating unit area in sequence, and the ultrasonic signal is transmitted to each heating area of ​​the heating unit area through the magnetic collection area. Similarly, the cross-sectional area of ​​the magnetic collection area 14 is the largest, so the magnetic collection area 14 can receive a large amount of magnetic lines of force, and the magnetic lines of force pass through the transition area 13 to reach the heating unit area. Based on the fact that the heating element 1 has a higher relative magnetic permeability, the magnetic line density of the heating unit area in the middle will be greatly enhanced at this time, and the heating unit area will generate a higher temperature under the action of the high-frequency magnetic field.

[0062] Furthermore, the magnetic collection area 14 extends along the second direction; the heating element 1 includes a plurality of heating unit areas arranged at intervals along the second direction, and each heating unit area is connected to the magnetic collection area 14 via a corresponding transition area 13 .

[0063] Specifically, in this embodiment, in the second direction, the heating element 1 is further provided with a plurality of heating unit areas arranged at intervals along the second direction, and at the same time, both ends of the plurality of heating unit areas are correspondingly connected with transition areas 13. In the first direction, one end of the plurality of heating unit areas is connected to the same magnetic collection area 14 through the corresponding transition area 13; and the other ends of the plurality of heating unit areas are connected to the same magnetic collection area 14 through the corresponding transition area 13. Since the plurality of heating unit areas are arranged at intervals, the degree of discreteness of the heating unit areas in the heating element 1 can be increased, and heat concentration can be reduced, while the atomization area can be effectively increased and the atomization efficiency can be improved.

[0064] Furthermore, the heating element 1 further includes a supporting portion 15 , and the supporting portion 15 is connected between two heating areas adjacent to each other along the second direction.

[0065] Specifically, the heating unit area extends along the first direction. In the first direction, the heating unit area is a long strip structure. Therefore, along the second direction, a support portion 15 is set between two adjacent heating unit areas. The support portion 15 can support the two adjacent heating areas along the second direction, thereby improving the structural strength of the two adjacent heating areas.

[0066] In some embodiments, the magnetic collection area 14, the transition area 13 and the heating unit area are all rotating body structures. At this time, the magnetic collection area 14, the transition area 13 and the heating unit area are all three-dimensional structures, and the central axis direction of the heating element 1 is parallel to the direction of the magnetic force lines. The magnetic collection areas 14 at both ends of the heating element 1 receive more magnetic force lines, and then the magnetic force lines continue to pass through the middle of the heating element 1, continuously strengthening the density of the magnetic force lines, so that a higher temperature can be generated under the action of the high-frequency magnetic field.

[0067] In some other embodiments, the magnetic collection area 14, the transition area 13 and the heating unit area are all flat. Each area on the heating element 1 extends along the first direction, and the magnetic collection areas 14 at both ends of the heating element 1 receive more magnetic lines of force, and then the magnetic lines of force continue to pass through the middle of the heating element 1, continuously strengthening the density of the magnetic lines of force, so that a higher temperature can be generated under the action of the high-frequency magnetic field.

[0068] Furthermore, the heating element 1 is in a columnar structure with a hollow interior, or the heating element 1 is in a flat shape.

[0069] Specifically, in one embodiment, the heating element 1 is a columnar structure with a hollow interior, wherein the circumferential direction of the heating element 1 with a columnar structure is the second direction, and the axial direction thereof is the first direction. The heating element 1 with a columnar structure is formed by enclosing five heating unit areas arranged at intervals, thereby increasing the degree of discreteness of the heating unit areas, reducing heat concentration, and effectively increasing the atomization area and improving the atomization efficiency. In another embodiment, the heating element 1 is flat, then the first direction is the vertical direction, and the second direction is the lateral direction. In the lateral direction, the flat heating element 1 includes six heating unit areas 3 arranged at intervals. In other embodiments, the number of heating unit areas may be three, four, five, seven, eight or ten, and so on.

[0070] Furthermore, the control module includes a circuit board 5 mounted on the end of the ultrasonic transceiver 3 away from the solid sound transmission medium 4, the coil 2 and the ultrasonic transceiver 3 are electrically connected to the circuit board 5, and the circuit board 5 is integrated with a microprocessor, which is used to send electrical pulse signals to the ultrasonic transceiver 3 and also to receive electrical signals sent by the ultrasonic transceiver 3.

[0071] Specifically, in the utility model, the heating component is applied to the aerosol generating device. When the device is working, the microprocessor first sends an electric pulse signal to the ultrasonic transceiver 3. After receiving the electric pulse signal, the ultrasonic transceiver 3 sends an ultrasonic signal to the heating element 1. The ultrasonic signal reaches the heating element 1 through the solid sound transmission medium 4 and is reflected on the ultrasonic reflection area 10 of the heating element 1. The reflected ultrasonic signal passes through the solid sound transmission medium 4 and is transmitted back to the ultrasonic transceiver 3. After receiving the returned ultrasonic reflection signal, the ultrasonic transceiver 3 sends an electric signal to the microprocessor. The microprocessor receives the return signal excited by the same electric pulse signal and records the time interval of the return signal. According to the time interval and the distance of the ultrasonic reflection area 10, the propagation speed of the ultrasonic signal in the heating element 1 is calculated. Finally, the calibrated sound speed temperature comparison table can output the corresponding temperature data. Finally, the microprocessor adjusts the output power of the coil 2 in real time according to this temperature.

[0072] Furthermore, the principle of temperature measurement is: the propagation speed of ultrasound in the medium is different. When the temperature of the medium changes, the sound speed in the medium will also change. Therefore, the sound speed and temperature can be matched through experimental data fitting, so if the sound speed is measured, the corresponding temperature can be known.

[0073] Specifically, Figure 3Take the medium in as an example: when the ultrasonic transceiver 3 sends an ultrasonic signal to the left side of the medium, the ultrasonic signal propagates at the speed of sound in the medium. In the propagation direction of the sound wave, it encounters the edge of the medium on the right side, and the sound speed immediately generates a reflection signal and returns to the left side of the medium. Because the right side of the medium is layered, that is, there are two edges on the right side of the medium. Therefore, when the sound speed is reflected to the left side at different edges, there is a time difference of △t. The time difference △t of receiving the two reflected signals can be detected on the left side of the medium. Then, the vertical distance between the two edges on the right side of the medium is divided by the time difference △t to obtain the sound speed u between the two edges. Then, through the correspondence between the sound speed and temperature of the medium calibrated in advance, the real-time temperature of the medium at that location can be measured.

[0074] In this embodiment, when the device is working, when the ultrasonic signal propagates in the heating element 1, when it encounters the ultrasonic reflection area 10 in the propagation direction, the sound wave signal will be reflected and a strong reflection signal will be generated. When the sound wave signal passes through two ultrasonic reflection areas 10 separated by a certain distance △L, there is a time difference △t between the two reflection signals reaching the microprocessor, and then the sound speed at this time can be obtained by the formula u=△L / △t. Finally, through the correspondence between the medium sound speed and temperature calibrated in advance, the microprocessor can measure the real-time temperature of the heating element 1 between the two ultrasonic reflection areas 10.

[0075] It should be understood that, for the connection between the heating zone and the transition zone 13, since the transition is smooth and inclined, although the signal can be reflected, the reflected signal will be mixed with other clutter signals and it is difficult to distinguish. Therefore, the microprocessor will filter out these signals. In addition, for the heating element 1 with multiple heating zones and multiple ultrasonic reflection zones 10 in the first direction, the microprocessor can measure the temperature of the multiple heating zones. Since the cross-sectional areas of different heating zones in the second direction may be different, the temperatures may also be different. However, in this case, the microprocessor can still measure the temperature of the heating zone between each two ultrasonic reflection zones 10, but the microprocessor still needs to identify different points to correspond different temperatures to different heating zones.

[0076] Furthermore, an aerosol generating device includes a heating assembly as described above. When the aerosol generating device is working, the heating element 1 of the heating assembly is distributed in a temperature gradient, and the heating element 1 can generate heat more efficiently. And through the ultrasonic transceiver 3, the circuit board 5, etc., the temperature of the heating area can be measured in real time.

[0077] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0078] The above is a description of the technical solution provided by the utility model. For technicians in this field, according to the ideas of the embodiments of the utility model, there will be changes in the specific implementation methods and application scopes. In summary, the content of this specification should not be understood as a limitation on the utility model.

Claims

1. A heating component, characterized in that: include: Coil, heating element, ultrasonic transceiver, sound transmission medium, and control module; The coil is used to generate an alternating magnetic field so that the heating element generates Joule heat in the alternating magnetic field; The sound transmission medium is located between the heating element and the ultrasonic transceiver; The heating element has at least two ultrasonic reflection areas spaced apart along a first direction; The coil and the ultrasonic transceiver are both electrically connected to the control module.

2. The heating assembly according to claim 1, characterized in that The ultrasound reflection area is a plane parallel to the second direction, and the first direction and the second direction are orthogonal.

3. The heating assembly according to claim 2, characterized in that The heating element includes a heating unit area, and the heating unit area has at least two heating areas connected in sequence along the first direction; the connection between two adjacent heating areas has a connecting surface parallel to the second direction; and, when the heating area has a free end and the end surface of the free end is parallel to the second direction, each connecting surface and each end surface is a different ultrasonic reflection area.

4. The heating assembly according to claim 3, characterized in that The heating unit area includes two first heating areas arranged at intervals along the first direction, and a second heating area located between the two first heating areas; the connection between the first heating area and the second heating area has a first connecting surface parallel to the second direction, and the first connecting surface is the ultrasonic reflection area.

5. The heating assembly according to claim 4, characterized in that In the second direction, the cross-sectional area of ​​the first heating zone is larger than the cross-sectional area of ​​the second heating zone, and the first connecting surface is formed at one end of the first heating zone connected to the second heating zone.

6. The heating assembly according to claim 4, characterized in that At least one end of the first heating area away from the second heating area has an end surface parallel to the second direction, and the end surface is the ultrasound reflection area.

7. The heating assembly according to claim 3, characterized in that The heating unit area includes a first heating area, a second heating area, a third heating area, a second heating area and a first heating area connected in sequence along the first direction; the connection between the first heating area and the second heating area has a first connecting surface parallel to the second direction; the connection between the second heating area and the third heating area has a second connecting surface parallel to the second direction; the first connecting surface and the second connecting surface are different ultrasonic reflection areas.

8. The heating assembly according to claim 7, characterized in that In the second direction, the cross-sectional area of ​​the first heating zone is greater than the cross-sectional area of ​​the second heating zone, and the cross-sectional area of ​​the second heating zone is greater than the cross-sectional area of ​​the third heating zone; the first connecting surface is formed at one end of the first heating zone connected to the second heating zone, and the second connecting surface is formed at one end of the second heating zone connected to the third heating zone.

9. The heating assembly according to claim 7, characterized in that At least one end of the first heating area away from the second heating area has an end surface parallel to the second direction, and the end surface is the ultrasound reflection area.

10. The heating assembly according to claim 3, characterized in that The heating element also includes a magnetic collection area and a transition area, and at least one end of the heating unit area is connected to the magnetic collection area through the transition area; in the second direction, the planar cross-sectional areas of the magnetic collection area, the transition area, and the heating unit area decrease successively.

11. The heating assembly according to claim 10, characterized in that The sound transmission medium includes a solid sound transmission medium, the solid sound transmission medium extends along the first direction, one end of the solid sound transmission medium is in contact with the heating element and the other end of the solid sound transmission medium is in contact with the ultrasonic transceiver.

12. The heating assembly according to claim 11, characterized in that The heating element comprises two transition areas and two magnetic collection areas spaced apart along the first direction; One end of the heating unit area is connected to one magnetic collection area through a transition area; the other end of the heating unit area is connected to another magnetic collection area through another transition area; One of the magnetic collection areas is connected to an end of the solid sound transmission medium away from the ultrasonic transceiver.

13. The heating assembly according to claim 11, characterized in that One end of the heating unit area is connected to the magnetic collection area through a transition area, and the other end of the heating unit area is connected to an end of the solid sound transmission medium away from the ultrasonic transceiver; Alternatively, one end of the heating unit area is connected to the magnetic collection area through the transition area, and one end of the magnetic collection area away from the transition area is connected to one end of the solid sound transmission medium away from the ultrasonic transceiver.

14. The heating assembly according to claim 10, characterized in that The magnetic collection area extends along the second direction; The heating element includes a plurality of heating unit areas arranged at intervals along the second direction, and each of the heating unit areas is connected to the magnetic collection area through the corresponding transition area.

15. The heating assembly according to claim 1, characterized in that The control module includes a circuit board mounted on an end of the ultrasonic transceiver away from the solid sound transmission medium. The coil and the ultrasonic transceiver are electrically connected to the circuit board. The circuit board is integrated with a microprocessor. The microprocessor is used to send electrical pulse signals to the ultrasonic transceiver and also to receive electrical signals sent by the ultrasonic transceiver.

16. An aerosol generating device, characterized in that: Comprising a heating component as described in any one of claims 1-15.

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