Aerosol-generating device

Abstract

The invention discloses an aerosol generating device, which comprises a microwave generating assembly, a microwave feed-in assembly, a microwave heating assembly and a control assembly, and is characterized in that the microwave generating assembly comprises a protection circuit; the control assembly is used for determining the current state and outputting state control signals, and the state control signals comprise a working control signal and a standby control signal; the protection circuit comprises a detection module used for detecting a state control signal and outputting a switch control signal according to the state control signal; a first end of the switch module inputs a power supply voltage signal, a second end of the switch module is connected with a power supply end of the power amplifier, and a control end of the power amplifier inputs a constant voltage signal; and the switch control module is used for controlling the switch-on and switch-off of the switch module according to the switch control signal. By implementing the technical scheme of the invention, the power consumption of the power amplifier is saved, the stability of the electrical performance of the power amplifier is ensured, and the damage probability is reduced.

Description

Technical Field

[0001] The present invention relates to the field of electronics, and particularly to an aerosol generating device. Background Art

[0002] With the development of semiconductors, microwave power amplifiers have diverse electrical properties, evolving from silicon and germanium in the first generation to gallium arsenide and gallium phosphide in the second generation, and then to silicon carbide and gallium nitride in the third generation. Moreover, microwave power amplifiers are widely used in various microwave electronic products, such as aerosol generating devices for microwave heating. When these electronic products are operating or in a static standby state, the power amplifier, as the electronic component with the highest heat generation in the product, its power consumption cannot be ignored. Especially in the working state of a lithium battery, this standby power consumption has a more obvious impact on the standby duration of the electronic product.

[0003] In some existing electronic products, the power amplifier is always in a powered state, but this will increase the power consumption of the whole machine. There is also a method of controlling the on or off of the power amplifier through a switching circuit. Although this can save power consumption, the discreteness of the device and the change of the load will cause the jitter of the control voltage (bias voltage), thereby changing the electrical properties of the power amplifier. Moreover, frequently switching the power amplifier easily causes damage to the power amplifier. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide an aerosol generating device in view of the technical defects of high power consumption and easy damage existing in the prior art.

[0005] The technical solution adopted by the present invention to solve its technical problems is to construct an aerosol generating device, including: a microwave generating component, a microwave feeding component, a microwave heating component, and a control component. The microwave generating component generates a microwave signal and feeds the microwave signal into the microwave heating component through the microwave feeding component to heat the aerosol generating matrix. The microwave generating component includes a connected microwave signal source and a power amplifier, and the microwave generating component further includes a protection circuit for protecting the power amplifier;

[0006] The control component is used to determine the current state of the aerosol generating device and output a state control signal, and the state control signal includes a working control signal and a standby control signal;

[0007] The protection circuit includes:

[0008] A detection module, configured to detect the state control signal and output a switch control signal according to the state control signal;

[0009] A switch module, wherein a power supply voltage signal is input to the first end of the switch module, and the second end of the switch module is connected to the power supply end of the power amplifier. Among them, a constant voltage signal is input to the control end of the power amplifier;

[0010] A switch control module for controlling the conduction and cut-off of the switch module according to the switch control signal.

[0011] Preferably, the detection module includes: resistor R3, resistor R5, and diode D1. Among them, the first end of the resistor R5 is the input end of the detection module and is used to input the state control signal. The second end of the resistor R5 is respectively connected to the negative electrode of the diode D1 and the first end of the resistor R3. The second end of the resistor R3 is connected to a negative voltage, and the positive electrode of the diode D1 is the output end of the detection module and is used to output the switch control signal.

[0012] Preferably, the control end of the power amplifier is further connected to the output end of a negative voltage source, and the second end of the resistor R3 is connected to the control end of the power amplifier.

[0013] Preferably, the detection module further includes resistor R6. The first end of the resistor R6 is connected to the negative electrode of the diode D1, and the second end of the resistor R6 is grounded.

[0014] Preferably, the switch module includes MOS transistor Q1 and resistor R1. Among them, the source of the MOS transistor Q1 is the first end of the switch module and is used to input the power supply voltage signal. The drain of the MOS transistor Q1 is the second end of the switch module and is connected to the power supply end of the power amplifier. The resistor R1 is connected between the source and the gate of the MOS transistor Q1.

[0015] Preferably, the switch control module includes resistor R2, resistor R4, triode Q2, and capacitor C1. Among them, the base of the triode Q2 is grounded through the resistor R4. The emitter of the triode Q2 is connected to the output end of the detection module. The collector of the triode Q2 is connected to the gate of the MOS transistor Q1 through the resistor R2. The capacitor C1 is connected between the emitter of the triode Q2 and the ground.

[0016] Preferably, it further includes:

[0017] An anti-reflection module connected between the second end of the switch module and the power supply end of the power amplifier and used to prevent the microwave signal output by the power amplifier from flowing back.

[0018] Preferably, the anti-reflection module includes diode D2, and the positive electrode of the diode D2 is connected to the second end of the switch module, and the negative electrode of the diode D2 is connected to the power supply end of the power amplifier.

[0019] Preferably, the microwave generating component further includes:

[0020] A coupler for coupling a part of the microwave signal output from the power amplifier;

[0021] A detector for detecting the amplitude of the coupled microwave signal and transmitting it to the control component;

[0022] The control component is configured to adjust the power of the microwave signal output by the power amplifier according to the amplitude.

[0023] Preferably, the microwave generating component further includes a voltage management module, and

[0024] The control component is configured to adjust the power of the microwave signal output by the power amplifier by adjusting the power supply voltage signal output by the voltage management module to the power amplifier according to the amplitude.

[0025] Through the technical solution of the present invention, the detection module detects the status control signal (working control signal or standby control signal) output by the control component, and outputs a switch control signal according to the status control signal. The switch control module then controls the on and off of the switch module according to the switch control signal, so that the power supply terminal of the power amplifier can select to access the power supply voltage signal or not access the power supply voltage signal according to the status control signal of the aerosol generating device, thereby enabling power supply to the power amplifier only in the working state and stopping power supply to the power amplifier in the standby state, thus saving the power consumption of the power amplifier. Moreover, since the switch module is connected to the power supply terminal of the power amplifier, and the control terminal of the power amplifier is connected to a constant voltage signal, even if the jitter of the switch control signal is caused by the discreteness of the device and the change of the load, and the bias voltage of the power amplifier does not change (constant voltage), the electrical performance of the power amplifier will still not change. In addition, since the control terminal of the power amplifier inputs a constant voltage signal, the power amplifier will not be switched on and off frequently, reducing the probability of damage. Description of the Drawings

[0026] In order to more clearly illustrate the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained according to these drawings without creative efforts. In the drawings:

[0027] Figure 1 is the logical structure diagram of the first embodiment of the aerosol generating device of the present invention;

[0028] Figure 2Yes Figure 1 Logic structure diagram of the first embodiment of the medium-power amplifier and the protection circuit;

[0029] Figure 3 Yes Figure 1 Circuit diagram of the second embodiment of the medium-power amplifier and the protection circuit;

[0030] Figure 4 Logic structure diagram of the second embodiment of the aerosol generating device of the present invention;

[0031] Figure 5 Waveform diagram of each signal in the first case of the aerosol generating device of the present invention;

[0032] Figure 6 Waveform diagram of each signal in the second case of the aerosol generating device of the present invention. Specific embodiments

[0033] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0034] Figure 1 Logic structure diagram of the first embodiment of the aerosol generating device of the present invention. The aerosol generating device of this embodiment includes: a microwave generating component 10, a microwave feeding component 20, a microwave heating component 30, and a control component 40. The microwave generating component 10 generates a microwave signal and feeds the microwave signal into the microwave heating component 30 through the microwave feeding component 20 to heat the aerosol generating matrix. The microwave generating component 10 includes a connected microwave signal source 11 and a power amplifier 12, and also includes a protection circuit 13 for protecting the power amplifier 12. The control component 40 is used to determine the current state of the aerosol generating device and output a state control signal, and the state control signal includes a working control signal and a standby control signal. When the aerosol generating device heats the aerosol forming matrix, the control component 40 outputs a working control signal, and when in a non-heating state or an abnormal state, it outputs a standby control signal.

[0035] Combine Figure 2, the protection circuit includes a detection module 131, a switch control module 132, and a switch module 133. Among them, the first end of the switch module 133 inputs a power supply voltage signal, the second end of the switch module 133 is connected to the power supply terminal of the power amplifier 12, and moreover, a constant voltage signal is input to the control terminal of the power amplifier 12. Additionally, it should be noted that the control terminal of the power amplifier 12 is also connected to the output terminal of the microwave signal source 11, that is, for inputting a microwave signal. That is to say, the signal input to the control terminal of the power amplifier 12 is a superimposed signal of a constant voltage signal and a microwave signal (alternating signal); the detection module 131 is used to detect the status control signal and output a switch control signal according to the status control signal; the switch control module 132 is used to control the on and off of the switch module 133 according to the switch control signal. Specifically, when the status control signal is a working control signal, it controls the switch module 133 to conduct. At this time, the power supply voltage signal can be input to the power supply terminal of the power amplifier 12 to enable the power amplifier 12 to work normally; when the status control signal is a standby control signal, it controls the switch module 133 to turn off. At this time, the power supply voltage signal will not be input to the power supply terminal of the power amplifier 12 to enable the power amplifier 12 to stop working.

[0036] In the protection circuit of this embodiment, the detection module detects the status control signal (working control signal or standby control signal) output by the control component and outputs a switch control signal according to this status control signal. The switch control module then controls the on and off of the switch module according to this switch control signal, so that the power supply terminal of the power amplifier can select to connect or not connect the power supply voltage signal according to the status control signal, thereby enabling the power amplifier to be powered only in the working state and stopping power supply to the power amplifier in the standby state. Therefore, the power consumption of the power amplifier is saved. Compared with the method of controlling the operation of the power amplifier by the bias voltage of the power amplifier, since the switch module is connected to the power supply terminal of the power amplifier and a constant voltage signal is input to the control terminal of the power amplifier, even if the jitter of the switch control signal is caused by the discreteness of the device and the change of the load, and the bias voltage of the power amplifier does not change (constant voltage), the electrical performance of the power amplifier will still not change. Additionally, since a constant voltage signal is input to the control terminal of the power amplifier, the power amplifier will not be switched frequently, reducing the probability of damage.

[0037] Furthermore, in addition to the working control signal and the standby control signal, the status control signal also includes an abnormal control signal, so that the power supply to the power amplifier can be cut off both when the device is in standby and when an abnormality occurs, and the power amplifier is powered only when the device is working normally (during the user's suction time).

[0038] Further, in an alternative embodiment, the protection circuit of the present invention further includes an anti - reverse module, which is connected between the second end of the switch module and the power supply terminal of the power amplifier, and is used to prevent the microwave signal output by the power amplifier from flowing back.

[0039] Figure 3 Yes Figure 1 Figure 2 is a circuit diagram of the power amplifier and the second embodiment of the protection circuit. The protection circuit of this embodiment is used to protect the power amplifier 12. The power amplifier 12 includes a radio - frequency amplification tube U1. It should be understood that the gate and drain of the radio - frequency amplification tube U1 are also respectively connected with devices such as inductors and capacitors (not shown in the figure). The protection circuit of this embodiment includes a detection module 131, a switch control module 132, a switch module 133, and an anti - reverse module 134.

[0040] In the detection module 131 of this embodiment, there are: resistor R3, resistor R5, diode D1, resistor R6. Among them, the first end of resistor R5 is the input end of the detection module 131 and is used to input a status control signal (ctrl). The second end of resistor R5 is respectively connected to the negative electrode of diode D1 and the first end of resistor R3. The second end of resistor R3 is connected to a negative voltage (Vgs). The positive electrode of diode D1 is the output end of the detection module 131 and is used to output a switch control signal. The first end of resistor R6 is connected to the negative electrode of diode D1, and the second end of resistor R6 is grounded. In addition, in this embodiment, the constant - voltage signal input to the control end of the power amplifier 12 is also a negative voltage. Therefore, the second end of resistor R3 and the control end of the power amplifier 12 can be connected to the output end of the negative - voltage source together. It should be understood that in other embodiments, the second end of resistor R3 and the control end of the power amplifier 12 may not be connected together. For example, the second end of resistor R3 and the control end of the power amplifier 12 are respectively connected to appropriate voltage signals.

[0041] In the switch module 133 of this embodiment, there are: MOS transistor Q1, resistor R1. Among them, MOS transistor Q1 is a P - type MOS transistor, and the source of this MOS transistor Q1 is the first end of the switch module 133 and is used to input a power - supply voltage signal (+VDD). The drain of MOS transistor Q1 is the second end of the switch module 133 and is connected to the power - supply terminal of the power amplifier 12 through the anti - reverse module 134. Resistor R1 is connected between the source and the gate of MOS transistor Q1.

[0042] In the switch control module 132 of this embodiment, there are: resistor R2, resistor R4, triode Q2, capacitor C1. Among them, the base of triode Q2 is grounded through resistor R4. The emitter of triode Q2 is connected to the output end of the detection module 131, that is, connected to the positive electrode of diode D1. The collector of triode Q2 is connected to the gate of MOS transistor Q1 through resistor R2. Capacitor C1 is connected between the emitter of triode Q2 and the ground.

[0043] In the anti - reverse module 134 of this embodiment, it includes: a diode D2, and the positive electrode of the diode D2 is connected to the second end of the switch module 133, that is, connected to the drain of the MOS transistor Q1. The negative electrode of the diode D2 is connected to the power supply terminal of the power amplifier 12 and is used to output a microwave signal.

[0044] The working principle of this protection circuit is described below:

[0045] When the state control signal (ctrl) output by the control component is at a high level, for example, a high level is output in the standby state or abnormal state, the diode D1 is not conducting, and the voltage between the base and emitter of the triode Q2 is 0V, which is less than the initial conduction voltage, so the triode Q2 is not conducting either. At this time, the resistor R1 makes the voltage between the gate and source of the MOS transistor Q1 equal, and the MOS transistor Q1 is not conducting, and the voltage at Vd is 0V, and the power amplifier 12 cannot be powered on to work.

[0046] When the state control signal (ctrl) output by the control component is at a low level, for example, a low level is output in the normal working state, the diode D1 conducts, and the voltage between the base and emitter of the triode Q2 is greater than the initial conduction voltage, so the triode Q2 conducts, thus pulling down the voltage at the collector of the triode Q2 to contact the ground. At this time, the power supply voltage signal (+VDD) passes through the resistor R1 and the resistor R2 to GND, and the voltage between the gate and source of the MOS transistor Q1 changes from 0 to a negative voltage, and the resistance value between GD becomes smaller and smaller, getting closer and closer to 0, and the MOS transistor Q1 conducts, and there is a voltage at Vd, the magnitude of which is approximately equal to the power supply voltage signal (+VDD). This voltage signal supplies the power supply voltage to the power amplifier 12 through the diode D2. It should be noted that the diode D2 can play a role in restricting the unidirectional flow of current, preventing the alternating voltage and current of the radio frequency envelope signal from flowing back during the working state of the power amplifier 12, and at the same time preventing current from flowing back after the power supply drops.

[0047] Figure 4 It is the logic structure diagram of the second embodiment of the aerosol - generating device of the present invention. The aerosol - generating device of this embodiment compared with Figure 1In the illustrated embodiment, the only difference is that the microwave generating assembly 10 further includes a coupler 14, a detector 15, and a voltage management module 16. Among them, the coupler 14 is used to couple a part of the microwave signal from the microwave signal output by the power amplifier 12; the detector 15 is used to detect the amplitude of the coupled microwave signal and transmit it to the control assembly 40. The control assembly 40 is further configured to adjust the power of the microwave signal output by the power amplifier 12 by adjusting the power supply voltage signal output by the voltage management module 16 to the power amplifier 12 according to the amplitude. For example, at the moment when the user sucks, the power of the microwave signal output by the power amplifier 12 is increased; when the user does not suck, the power of the microwave signal output by the power amplifier 12 is decreased. Of course, in other embodiments, the voltage management module 16 may not be provided, and the control assembly 40 adjusts the power of the microwave signal output by the power amplifier 12 in other ways according to the amplitude of the coupled microwave signal. For example, the power of the microwave signal output by the microwave signal source 11 is adjusted.

[0048] Next, the power-on sequence of each signal in the aerosol generating device of the present invention needs to be described:

[0049] First, as Figure 5 shown, in this case, the state control signal is at a low level, as shown by the curve L4. The voltage (Vgs bias voltage) at the control end of the power amplifier 12 remains in an open state, and the voltage is a negative voltage, as shown by the curve L1. Moreover, the Vgs bias voltage is preferentially turned on after the device is powered on or restarted after power-off. When the device is powered on, for example, at the moment t1, the power supply assembly outputs a power supply voltage signal +VDD, as shown by the curve L2. Moreover, under the control of the switch control signal, the voltage signal at Vd starts to increase from 0 at the moment t2 and stabilizes at a certain voltage (the power supply voltage minus the voltage between the drain and source of the MOS transistor Q1), so as to supply power to the power amplifier 12, as shown by the curve L3, and the power amplifier starts to work. In addition, as Figure 5 shown, the power supply voltage +VDD lags behind the bias voltage by more than 150 ms, and the voltage at Vd lags behind the power supply voltage +VDD by 6 ms.

[0050] As Figure 6As shown, in this case, the state control signal changes from high level to low level at time t3, as shown by curve L4. Moreover, when the state control signal is at high level, since the switch module is disconnected and the power amplifier is in the off state, the voltage signal at Vd is 0, as shown by curve L3. When the state control signal changes to low level, since the switch module is turned on, the supply voltage signal +VDD (as shown by curve L2) controls the voltage signal at Vd to increase from 0 to a certain voltage (the supply voltage minus the voltage between the drain and source of MOS transistor Q1) at time t4 under the control of the switch control signal, thereby supplying power to the power amplifier 12, as shown by curve L3, and enabling the power amplifier to start working. Additionally, in this case, the voltage (Vgs bias voltage) at the control terminal of the power amplifier 12 also remains in the normally open state, and the voltage is a negative voltage, as shown by curve L1.

[0051] In summary, when the aerosol generating device is powered on, powered off, in multiple working modes, or suddenly has an abnormality, the control terminal of the power amplifier always maintains a stable constant voltage (negative Vgs bias voltage), making the performance of the power amplifier stable. Moreover, the anti - reverse module can play a role in one - way conduction and flow, isolating the front and back of the power amplifier when in the powered - on working state or powered off, ensuring that the front - back voltage and current are not coupled when the RF output or load changes, and avoiding the power amplifier being easily damaged due to voltage jitter. Additionally, when the aerosol generating device is working, to improve the reliability of the product and the user experience, the disconnection and turning - on of the power amplifier are controlled through the logical control of the peripheral interface ctrl, reducing the power consumption of the product and meeting the user experience. Therefore, the technical solution of the present invention can better protect the power amplifier, make the operation of the power amplifier stable, and improve the reliability of the device.

[0052] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the scope of the claims of the present invention.

Claims

1. An aerosol generating device, comprising: A microwave generating component, a microwave feeding component, a microwave heating component and a control component, wherein the microwave generating component generates a microwave signal and feeds the microwave signal into the microwave heating component through the microwave feeding component to heat an aerosol generating substrate. The microwave generating component includes a connected microwave signal source and a power amplifier. It is characterized in that the microwave generating component further includes a protection circuit for protecting the power amplifier; The control component is configured to determine the current state of the aerosol generating device and output a state control signal, and the state control signal includes an operation control signal and a standby control signal; The protection circuit includes: A detection module for detecting the state control signal and outputting a switch control signal according to the state control signal; A switch module, wherein a first end of the switch module inputs a supply voltage signal, and a second end of the switch module is connected to a power supply terminal of the power amplifier. Wherein, a constant voltage signal is input to a control terminal of the power amplifier A switch control module for controlling the conduction and cutoff of the switch module according to the switch control signal.

2. The aerosol generating device according to claim 1, wherein, The detection module includes a resistor R3, a resistor R5, and a diode D1. Wherein, a first end of the resistor R5 is an input end of the detection module and is used for inputting the state control signal. A second end of the resistor R5 is respectively connected to a negative electrode of the diode D1 and a first end of the resistor R3. A second end of the resistor R3 is connected to a negative voltage. A positive electrode of the diode D1 is an output end of the detection module and is used for outputting the switch control signal.

3. The aerosol generating device according to claim 2, wherein The control terminal of the power amplifier is further connected to an output terminal of a negative voltage source, and the second end of the resistor R3 is connected to the control terminal of the power amplifier.

4. The aerosol generating device according to claim 2, characterized in that, The detection module further includes a resistor R6, a first end of the resistor R6 is connected to the negative electrode of the diode D1, and a second end of the resistor R6 is grounded.

5. The aerosol generating device according to claim 1, wherein The switch module includes a MOS transistor Q1 and a resistor R1. Wherein, a source electrode of the MOS transistor Q1 is a first end of the switch module and is used for inputting the supply voltage signal. A drain electrode of the MOS transistor Q1 is a second end of the switch module and is connected to the power supply terminal of the power amplifier. The resistor R1 is connected between the source electrode and the gate electrode of the MOS transistor Q1.

6. The aerosol generating device according to claim 5, wherein The switch control module includes a resistor R2, a resistor R4, a triode Q2, and a capacitor C1. Wherein, a base of the triode Q2 is grounded through the resistor R4. An emitter of the triode Q2 is connected to an output end of the detection module. A collector of the triode Q2 is connected to a gate electrode of the MOS transistor Q1 through the resistor R2. The capacitor C1 is connected between the emitter of the triode Q2 and the ground.

7. The aerosol generating device according to any one of claims 1-6, characterized in that, It further includes: An anti - reverse module connected between the second end of the switch module and the power supply terminal of the power amplifier and used for preventing the microwave signal output by the power amplifier from flowing back; 8. The aerosol generating device according to claim 7, wherein The anti - reverse module includes a diode D2, and a positive electrode of the diode D2 is connected to the second end of the switch module, and a negative electrode of the diode D2 is connected to the power supply terminal of the power amplifier.

9. The aerosol generating device according to claim 1, wherein The microwave generating component further includes: A coupler for coupling a partial microwave signal from the microwave signal output by the power amplifier; A detector for detecting the amplitude of the coupled microwave signal and transmitting it to the control component; The control component for adjusting the power of the microwave signal output by the power amplifier according to the amplitude.

10. The aerosol generating device according to claim 9, wherein, The microwave generating component further includes a voltage management module, and The control component for adjusting the power of the microwave signal output by the power amplifier by adjusting the power supply voltage signal output by the voltage management module to the power amplifier according to the amplitude.

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