Aerosol-generating device
Patent Information
- Application Number
- CN202521938649.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-09
- Publication Date
- 2026-09-25
- Estimated Expiration
- 2035-09-09
AI Technical Summary
[0004]本实用新型要解决的技术问题在于，针对现有技术存在的成本大、加热效率低的技术问题，提供一种气溶胶生成装置
[0024]通过本实用新型的技术方案，通过选用高隔离度(隔离度大于预设值)的耦合器，可减少甚至避免耦合器前、反向功率的泄漏串扰，进而使得耦合器的输出端可以直接与天线相连，而不需要在耦合器的输出端与天线之间设置隔离器或环形器。这样，不但可对微波放大单元中的功率放大管进行隔离及保护(防止天线反射回来的信号破坏功率放大管)，提高了微波雾化组件的稳定性。而且，由于省去了隔离器或环形器，所以，降低了器具的成本和能耗，解决了成本大、发热大、加热效率低的问题，提高微波信号的传输性能。
Smart Images
Figure CN224791714U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of electronic atomization, and in particular to an aerosol generating device. Background Technology
[0002] With the development of technology in the tobacco industry, there are currently two main types of devices: traditional cigarettes and aerosol generating devices. Traditional cigarettes are heated by an open flame, reaching temperatures of 830 to 900 degrees Celsius during combustion, releasing various harmful chemicals that affect and endanger human life and health. Aerosol generating devices produce aerosols through non-combustion methods, typically using resistance or electromagnetic heating to heat the heating element, which then conducts heat to the aerosol generating matrix, achieving atomization. While this heating method reduces the harm caused by the high-temperature combustion of cigarettes, it suffers from slow smoke production, uneven heating, and charring due to aging. Therefore, microwave heating has emerged to improve heating uniformity and atomization effect.
[0003] For microwave-heated aerosol generators, as power requirements increase, the power amplifier tubes in the microwave atomization assembly are easily damaged by abnormal factors such as high power, especially when the load experiences open circuits, short circuits, or severe changes, causing the power amplifier tubes to fail and rendering the microwave atomization assembly inoperable. To ensure the normal operation of the microwave atomization assembly, isolators or circulators are usually installed to isolate and protect the power amplifier tubes. While this improves the stability of the microwave atomization assembly, adding isolators or circulators inevitably increases costs. Moreover, the isolators or circulators themselves suffer from losses, resulting in high heat generation and low heating efficiency. Utility Model Content
[0004] The technical problem to be solved by this utility model is to provide an aerosol generating device that addresses the issues of high cost and low heating efficiency in existing technologies.
[0005] The technical solution adopted by this utility model to solve its technical problem is as follows: constructing an aerosol generating device, including a microwave atomizing component, wherein the microwave atomizing component includes a control module, a radio frequency module and an antenna, wherein the radio frequency module includes a microwave generating unit, a microwave amplifying unit and a coupler connected in sequence, and the microwave generating unit generates a microwave signal under the control of the control module, the microwave amplifying unit amplifies the generated microwave signal and feeds it into the antenna through the coupler; wherein the isolation of the coupler is greater than a preset value.
[0006] Optionally, the coupler is a microstrip coupler.
[0007] Optionally, the microstrip coupler includes:
[0008] Main microstrip line;
[0009] A coupled microstrip line, wherein at least a portion of the coupled microstrip line is coupled to the main microstrip line;
[0010] A toe structure disposed in the coupling region, the toe structure comprising: a plurality of first toes sequentially disposed on the main microstrip line and extending toward the coupling microstrip line; a plurality of second toes sequentially disposed on the coupling microstrip line and extending toward the main microstrip line, wherein at least portions of the plurality of first toes and at least portions of the plurality of second toes are alternately disposed in the axial direction of the microstrip coupler.
[0011] Optionally, the number of first toes is four, the number of second toes is four, and the four first toes and the four second toes are alternately arranged in sequence along the axial direction of the microstrip coupler;
[0012] or,
[0013] The number of the first toe portion is five; the number of the second toe portion is four.
[0014] Optionally, the coupled microstrip line includes a first microstrip line, a second microstrip line, and a third microstrip line connected in sequence, wherein the second microstrip line is arranged parallel to the main microstrip line, and the first microstrip line and / or the third microstrip line are arranged at an angle to the second microstrip line.
[0015] Optionally, the width of the second microstrip line is smaller than the width of the first microstrip line; and / or, the width of the second microstrip line is smaller than the width of the third microstrip line.
[0016] Optionally, the radio frequency module further includes a radio frequency interface connected between the output of the coupler and the antenna.
[0017] Optionally, the radio frequency module further includes:
[0018] A power detection unit is connected to the coupler and the control module respectively. The power detection unit is used to detect the power of the microwave signal input to the antenna and / or the microwave signal reflected back by the antenna through the coupler, and output the detection result to the control module.
[0019] Optionally, the power detection unit includes a forward detection unit and a reverse detection unit, wherein,
[0020] The forward detection unit is connected to the coupling end of the coupler and is used to detect a portion of the amplified microwave signal.
[0021] The reverse detection unit is connected to the isolation terminal of the coupler and is used to detect the microwave signal reflected back by the antenna.
[0022] Optionally, the microwave atomizing component further includes:
[0023] A power supply module connected to the control module and the radio frequency module, used to provide power supply voltage to the control module and the radio frequency module.
[0024] By employing a coupler with high isolation (greater than a preset value), the leakage crosstalk between the coupler's forward and reverse power can be reduced or even eliminated. This allows the coupler's output to be directly connected to the antenna without the need for an isolator or circulator between the coupler's output and the antenna. This not only isolates and protects the power amplifier tubes in the microwave amplification unit (preventing damage from signals reflected back from the antenna), improving the stability of the microwave atomization assembly, but also reduces the cost and energy consumption of the device by eliminating the need for an isolator or circulator, solving the problems of high cost, high heat generation, and low heating efficiency, and improving the transmission performance of microwave signals. Attached Figure Description
[0025] To more clearly illustrate the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. In the drawings:
[0026] Figure 1 This is a logical structure diagram of the microwave atomization component of an aerosol generation device in one embodiment of the present invention.
[0027] Figure 2 This is a logic structure diagram of the radio frequency module of the microwave atomizing component in one embodiment of the present invention;
[0028] Figure 3 This is a schematic diagram of the structure of the coupler of the radio frequency module in one embodiment of the present invention;
[0029] Figure 4 This is a frequency response test diagram in one embodiment of the present invention;
[0030] Figure 5 This is a logic structure diagram of the radio frequency module of the microwave atomizing component in one embodiment of the present invention;
[0031] Figure 6 This is a logical structure diagram of the microwave atomization component of an aerosol generation device in one embodiment of this utility model. Detailed Implementation
[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0033] This invention provides an aerosol generating device, which includes a microwave atomization component for microwave heating of an aerosol generating matrix to generate aerosols.
[0034] Figure 1 A microwave atomizing assembly is shown in one embodiment, which includes a control module 10, a radio frequency module 20, and an antenna 30. The control module 10 controls the radio frequency module 20 to output microwave signals and feed them into the antenna 30, so that the antenna 30 radiates microwaves toward the aerosol generating matrix.
[0035] Combined Figure 2 The radio frequency module 20 in this embodiment includes a microwave generating unit 21, a microwave amplifying unit 22, and a coupler 23 connected in sequence. The microwave generating unit 21 generates microwave signals under the control of the control module 10. The microwave amplifying unit 22 amplifies the generated microwave signals and feeds them into the antenna 30 through the coupler 23. The isolation of the coupler 23 is greater than a preset value, and the coupler 23 can be a unidirectional coupler or a dual-directional coupler. It should also be noted that the isolation of the coupler reflects far-end crosstalk and can be used to describe the ability to suppress signal leakage between ports, generally expressed in decibels (dB). The preset value is related to the application scenario and equipment requirements; for example, in an aerosol generating device, the preset value can be 45–55.
[0036] In this embodiment, by selecting a coupler with high isolation (isolation greater than a preset value), leakage crosstalk between the coupler's forward and reverse power can be reduced or even avoided. This allows the coupler's output to be directly connected to the antenna without the need for an isolator or circulator between the coupler's output and the antenna. This not only isolates and protects the power amplifier tubes in the microwave amplification unit (preventing signals reflected from the antenna from damaging the power amplifier tubes), improving the stability of the microwave atomization assembly, but also reduces the cost and energy consumption of the device by eliminating the need for an isolator or circulator, solving the problems of high cost, high heat generation, and low heating efficiency, and improving the transmission performance of microwave signals.
[0037] Furthermore, in one optional embodiment, the coupler is a microstrip coupler. Compared to other types of couplers (such as cavity couplers and dielectric couplers), microstrip couplers have advantages such as small size, light weight, and low cost. Moreover, the width, length, spacing, and other parameters of the microstrip lines can be flexibly adjusted according to the actual application, greatly shortening the design cycle. Of course, in other embodiments, cavity couplers, dielectric couplers, etc., can also be selected, as long as their isolation is greater than a preset value.
[0038] Furthermore, in an alternative embodiment, such as Figure 3 As shown, the microstrip coupler of this embodiment includes a main microstrip line 231, a coupling microstrip line 232, and a cross-link structure 233. The main microstrip line is a 50-ohm microstrip transmission line with an input terminal P1 and an output terminal P2 at its two ends. At least a portion of the coupling microstrip line 232 (e.g., a second microstrip line 2322) is arranged parallel to the main microstrip line 231 to couple them, forming a coupling region whose length is 1 / 4 wavelength of the center frequency of the operating signal. The two ends of the coupling microstrip line 232 are a coupling terminal P3 and an isolation terminal P4. The interdigitated structure 233 is disposed in the coupling region between the main microstrip line 231 and the coupling microstrip line 232, and the interdigitated structure 233 includes: a plurality of first toe portions 2331 and a plurality of second toe portions 2332, wherein the plurality of first toe portions 2331 are sequentially disposed on the main microstrip line 231 and extend toward the coupling microstrip line 232; the plurality of second toe portions 2332 are sequentially disposed on the coupling microstrip line 232 and extend toward the main microstrip line 231, and at least a portion of the plurality of first toe portions 2331 and at least a portion of the plurality of second toe portions 2332 are alternately disposed in the axial direction of the microstrip coupler.
[0039] In this embodiment, the microstrip coupler employs a microstrip interdigitated capacitor design, meaning that a microstrip interdigitated structure is set in the coupling region between the main microstrip line and the coupled microstrip line. The slits between the various toes of the interdigitated structure form distributed capacitance, which enhances the electromagnetic field confinement in the coupling region, reduces crosstalk between the input signal and the isolation signal, and improves the directivity of microwave signal transmission. Therefore, a microstrip coupler with high isolation can be constructed. Furthermore, this microstrip interdigitated structure can also widen the coupler's operating bandwidth, enabling the coupler to remain stable over a wider frequency range and improving its adaptability to microwave signals of different frequencies.
[0040] Furthermore, in an optional embodiment, there are four first toes and four second toes, and the four first toes and four second toes are alternately arranged in sequence along the axial direction of the microstrip coupler, that is, there are a total of 4 pairs of interdigitated toes. Moreover, preferably, the 4 pairs of interdigitated toes form a symmetrical structure when arranged alternately. For example, the shape and size of the toes on both sides are completely symmetrical, which can ensure the symmetrical distribution of the electromagnetic field and avoid additional reflections or crosstalk caused by structural asymmetry, thereby stabilizing the isolation.
[0041] In this embodiment, the paired interdigitations increase the coupling area between the main microstrip line and the coupled microstrip line, allowing the electromagnetic fields to interact better between the interdigitations, thereby more effectively controlling the coupling strength. Furthermore, the paired interdigitations can also generate a specific phase difference between signals from different paths, ensuring that the output signals at the coupling end are in phase, while simultaneously making the signal phases opposite at the isolation end, thus enhancing the isolation effect.
[0042] Furthermore, such as Figure 3 As shown, the number of first toes is five, and the number of second toes is four. In this embodiment, it should be noted that although theoretically the toes of a cross-toed knot are usually arranged in pairs, in actual design, one or more additional toes can be added to the paired cross-toed knots according to actual application requirements.
[0043] Furthermore, such as Figure 3 As shown, the coupling microstrip line includes a first microstrip line 2321, a second microstrip line 2322, and a third microstrip line 2323 connected in sequence. The second microstrip line 2322 is parallel to the main microstrip line 231, and the first microstrip line 2321 and / or the third microstrip line 2323 are arranged at an angle to the second microstrip line 2322. Specifically, both the first microstrip line 2321 and the third microstrip line 2323 are arranged at a 90-degree angle to the second microstrip line 2322. In this embodiment, the coupling microstrip line 232 is bent. Compared to its completely parallel arrangement with the main microstrip line 231, this reduces the PCB board area occupied and is more conducive to the trend of PCB miniaturization.
[0044] Furthermore, such as Figure 3 As shown, the width of the second microstrip line 2322 is smaller than the width of the first microstrip line 2321; the width of the second microstrip line 2322 is smaller than the width of the third microstrip line 2323. In the microstrip coupler, by narrowing the width of a segment of the microstrip line 232 parallel to the main microstrip line 231 (the second microstrip line 2322), the coupling strength of the coupling region can be enhanced.
[0045] Furthermore, since the width of the second microstrip line 2322 is smaller than the widths of the first microstrip line 2321 and the third microstrip line 2323, to avoid impedance mismatch, in this embodiment, as follows... Figure 3As shown, the outer side of the connection between the first microstrip line 2321 and the second microstrip line 2322, as well as the outer side of the connection between the third microstrip line 2323 and the second microstrip line 2322, are all set with beveled angles. That is, each connection adopts an external beveled design. This can ensure the continuity and uniformity of the characteristic impedance of the coupled microstrip lines, thereby improving the signal transmission characteristics.
[0046] When the frequency response of the coupler in the above embodiment was tested using a tester, the test results were as follows: Figure 4 As shown in the figure, at an operating frequency of 2.458 GHz, the frequency response of the coupler's S-parameters is as follows: dB(S(2,1)) is -0.033 dB, dB(S(1,1)) is less than -30 dB, dB(S(4,1)) is -68.403 dB, dB(S(3,1)) is -28.314 dB, and the directivity dB(D) is -40.089 dB. Therefore, the coupler has a good isolation performance (68.403) (greater than 45).
[0047] Figure 5 This is a logic structure diagram of the radio frequency module of the microwave atomizing component in one embodiment of the present invention. Compared with the radio frequency module in this embodiment... Figure 2 The embodiment shown also includes a power detection unit 24 and an RF interface 25.
[0048] like Figure 5 As shown, the RF interface 25 is connected between the output of the coupler 23 and the antenna. The characteristic impedance of the RF interface 25 can be 50Ω, and it can be, for example, a standard RF interface such as SMA, MMCX, SMB, or BNC. In this embodiment, the RF interface makes antenna installation more convenient.
[0049] like Figure 5As shown, the power detection unit 24 is connected to both the coupler 23 and the control module. It is used to detect the power of the microwave signal input to the antenna and / or the microwave signal reflected back from the antenna via the coupler 23, and output the detection result to the control module. The control module determines the power ratio of the microwave signal fed into the antenna based on the detection result and generates control parameters so that the microwave generation unit adjusts the frequency of the generated microwave signal according to the control parameters. In this embodiment, it should be noted that with the use of the aerosol generation device, the antenna may undergo a phase transition due to changes in external factors (such as environment, medium, force, aging), thereby affecting the transmission performance of the microwave signal. Therefore, during microwave atomization heating, the power detection unit 24 detects the power of the microwave signal input to the antenna and / or the microwave signal reflected back from the antenna, and the control module determines the frequency response transmission performance and matching of the microwave signal fed into the antenna based on the detection result. If the transmission performance is determined to be unsatisfactory, the control parameters sent to the microwave generation unit are reconfigured to adjust the microwave signal fed to the antenna so that its transmission performance meets the preset conditions. Therefore, it can be ensured that the antenna still operates with optimal power and efficiency during phase transition.
[0050] Furthermore, such as Figure 5As shown, the power detection unit 24 includes a forward detection unit 241 and a reverse detection unit 242. The forward detection unit 241 is connected to the coupling end of the coupler 23 and is used to detect a portion of the amplified microwave signal. The reverse detection unit 242 is connected to the isolation end of the coupler 23 and is used to detect the microwave signal reflected back from the antenna. In this embodiment, the microwave generation unit 21 generates a corresponding microwave signal according to the control parameters configured by the control module. This microwave signal is a continuous sine wave with a corresponding frequency and power. The generated microwave signal is amplified by the microwave amplification unit 22, and the amplified microwave signal is then sent to the input end P1 of the coupler 23. For the microwave signal sent to the coupler 23, a portion of the microwave signal is forward-transmitted through the output end P2 of the coupler 23, and the other portion of the microwave signal is forward-coupled through the coupling end P3 of the coupler 23. The forward-coupled microwave signal is transmitted to the forward detection unit 241 through a 50Ω microstrip line. The forward detection unit 241 detects the power and level of the coupled microwave signal and determines the frequency response transmission and matching of the microwave signal fed into the antenna. The forward-transmitted microwave signal is sent to the RF interface 25 through the output terminal P2 of the coupler 23. Simultaneously, the isolation terminal P4 of the coupler 23 receives the microwave signal reflected back from the antenna, which is transmitted to the reverse detection unit 242 through a 50Ω microstrip line. The reverse detection unit 242 detects the power and level of the reverse-coupled microwave signal and determines the frequency response transmission and matching of the microwave signal fed into the antenna. If the transmission and matching of the microwave signal are normal, the forward-transmitted microwave signal is sent to the antenna through the RF interface 25, and the antenna converts the microwave signal (alternating current signal) into electromagnetic waves and radiates them to the load medium. If, after performing relevant algorithms on the forward or reverse detection results, the microwave signal transmission is determined to be poor, the control module will reconfigure the control parameters sent to the microwave generation unit 21. In this way, a closed-loop circuit can be constructed to improve the frequency response transmission performance. Therefore, even if the antenna undergoes a phase change, the power and efficiency of the RF module can still be optimized, improving the performance and reliability of the entire product.
[0051] Figure 6 This is a logical structure diagram of the microwave atomization component of the aerosol generation device in one embodiment of the present invention. Compared with the microwave atomization component in this embodiment... Figure 1 The embodiment shown also includes a power module 40, which is connected to the control module 10 and the radio frequency module 20 to provide power supply voltage to the control module 10 and the radio frequency module 20 to ensure that the control module 10 and the radio frequency module 20 work normally.
[0052] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the scope of the claims of this utility model.
Claims
1. An aerosol generating device, comprising a microwave atomizing component, wherein the microwave atomizing component includes a control module, a radio frequency module, and an antenna, characterized in that, The radio frequency module includes a microwave generating unit, a microwave amplifying unit, and a coupler connected in sequence. The microwave generating unit generates a microwave signal under the control of the control module. The microwave amplifying unit amplifies the generated microwave signal and feeds it into the antenna through the coupler. The isolation of the coupler is greater than a preset value.
2. The aerosol generating apparatus according to claim 1, characterized in that, The coupler is a microstrip coupler.
3. The aerosol generating apparatus according to claim 2, characterized in that, The microstrip coupler includes: Main microstrip line; A coupled microstrip line, wherein at least a portion of the coupled microstrip line is coupled to the main microstrip line; A toe structure disposed in the coupling region, the toe structure comprising: a plurality of first toes sequentially disposed on the main microstrip line and extending toward the coupling microstrip line; a plurality of second toes sequentially disposed on the coupling microstrip line and extending toward the main microstrip line, wherein at least portions of the plurality of first toes and at least portions of the plurality of second toes are alternately disposed in the axial direction of the microstrip coupler.
4. The aerosol generating apparatus according to claim 3, characterized in that, The number of first toes is four, the number of second toes is four, and the four first toes and the four second toes are alternately arranged in the axial direction of the microstrip coupler. or, The number of the first toe portion is five; the number of the second toe portion is four.
5. The aerosol generating apparatus according to claim 3, characterized in that, The coupled microstrip line includes a first microstrip line, a second microstrip line, and a third microstrip line connected in sequence, wherein the second microstrip line is arranged parallel to the main microstrip line, and the first microstrip line and / or the third microstrip line are arranged at an angle to the second microstrip line.
6. The aerosol generating apparatus according to claim 5, characterized in that, The width of the second microstrip line is smaller than the width of the first microstrip line; and / or, the width of the second microstrip line is smaller than the width of the third microstrip line.
7. The aerosol generating apparatus according to claim 1, characterized in that, The radio frequency module also includes a radio frequency interface connected between the output of the coupler and the antenna.
8. The aerosol generating apparatus according to any one of claims 1-7, characterized in that, The radio frequency module also includes: A power detection unit is connected to the coupler and the control module respectively. The power detection unit is used to detect the power of the microwave signal input to the antenna and / or the microwave signal reflected back by the antenna through the coupler, and output the detection result to the control module.
9. The aerosol generating apparatus according to claim 8, characterized in that, The power detection unit includes a forward detection unit and a reverse detection unit, wherein, The forward detection unit is connected to the coupling end of the coupler and is used to detect a portion of the amplified microwave signal. The reverse detection unit is connected to the isolation terminal of the coupler and is used to detect the microwave signal reflected back by the antenna.
10. The aerosol generating apparatus according to claim 1, characterized in that, The microwave atomization component also includes: A power supply module connected to the control module and the radio frequency module, used to provide power supply voltage to the control module and the radio frequency module.