Heating circuit for aerosol-generating device and aerosol-generating device
By designing a heating circuit including the first heating element and the second heating element in the aerosol generation device, and using the microhead controller to output a driving signal to conduct the two heating elements, the problems of insufficient aerosol output and difficulty in miniaturizing the electronic atomizer in the prior art are solved, and a higher aerosol output and a more compact design are achieved.
Patent Information
- Application Number
- CN202421739563.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-22
- Publication Date
- 2025-06-06
- Estimated Expiration
- 2034-07-22
AI Technical Summary
The output power of the existing aerosol generation device is limited, resulting in a low aerosol amount, affecting the user's smoking experience. At the same time, the circuit design of multiple heating elements occupies a lot of space, which is not conducive to the miniaturization of electronic atomizers.
A heating circuit including a first heating element and a second heating element is designed, and a driving signal is outputted through an umbine controller to conduct a current loop between the two heating elements and the power supply, thereby increasing the output of the aerosol. At the same time, a compact circuit structure is used to facilitate the miniaturization design.
By increasing the output of aerosol, the user's smoking experience is improved, and the electronic atomizer is miniaturized through a compact circuit design.
Smart Images
Figure CN222941806U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of electronic atomization, and in particular to a heating circuit for an aerosol generating device and an aerosol generating device. Background Art
[0002] Typical aerosol generating devices include electronic atomizers. Generally, electronic atomizers heat an aerosol-forming matrix through a single heating element to generate an inhalable aerosol. The aerosol-forming matrix can be a liquid matrix, for example, including glycerin, propylene glycol, nicotine salt or other functional ingredients. However, the output power of the aerosol generating device using a single heating element for heating is limited, and the amount of aerosol (TPM) generated by heating the liquid matrix is relatively low, which reduces the user's smoking experience. In view of this, the prior art provides an electronic atomizer including multiple heating elements, which receives a suction signal from an airflow sensor (microphone controller) through a control chip, and then the control chip outputs a drive signal through different switch branches to correspondingly control the start-up of multiple heating elements. This circuit scheme requires the arrangement of many components such as a control chip and multiple switch tubes, and the PCB board needs to occupy a large structural space, which is not conducive to the miniaturization of the electronic atomizer. Utility Model Content
[0003] The present application aims to provide a heating circuit for an aerosol generating device and an aerosol generating device, which can increase the aerosol output of the aerosol generating device and at the same time facilitate the miniaturization design of the electronic atomizer.
[0004] To achieve the above objectives, in a first aspect, an embodiment of the present application provides a heating circuit for an aerosol generating device, comprising:
[0005] A power source for providing electrical power;
[0006] a first heating element;
[0007] a second heating element;
[0008] A first switch circuit, electrically connected between the power source and the first heating element;
[0009] A microphone controller, electrically connected to the power supply and having an output terminal for outputting a driving signal;
[0010] The first switch circuit is connected to the output end, and is used to receive a driving signal and conduct a current loop between the first heating element and the power supply when the microphone controller is triggered to start;
[0011] The second heating element is electrically connected to the output end, and the microphone controller is electrically connected between the second heating element and the power supply, and is used to conduct a current loop between the second heating element and the power supply when triggered to start.
[0012] In some embodiments, the heating circuit further includes a delay circuit, and the delay circuit is electrically connected between an output end of the microphone controller and the first switch circuit.
[0013] In some embodiments, the delay circuit includes a diode, a resistor and a capacitor, the anode of the diode is electrically connected to the output end of the microphone controller and one end of the second heating element, the cathode of the diode is electrically connected to one end of the resistor, the other end of the resistor is electrically connected to one end of the capacitor and the first switching circuit, and the other end of the capacitor is grounded.
[0014] In some embodiments, the first switch circuit includes an NMOS tube, a gate of the NMOS tube is electrically connected to the output end of the microphone controller, a drain of the NMOS tube is electrically connected to the first heating element, and a source of the NMOS tube is grounded.
[0015] In some embodiments, the continuous drain current of the NMOS tube is greater than the short-circuit current of the first heating element.
[0016] In some embodiments, the first switch circuit includes a transistor, a triode, an IGBT or a thyristor.
[0017] In some embodiments, the resistance values of the first heating element and the second heating element are substantially the same.
[0018] In some embodiments, the microphone controller further includes a power supply terminal, a ground terminal, an airflow detection module, an output control module, a pulse width modulation module, a voltage and current detection module, and a second switch circuit;
[0019] The power supply terminal and the ground terminal are electrically connected to the power supply;
[0020] The airflow detection module, the output control module, the pulse width modulation module and the second switch circuit are electrically connected in sequence, and the second switch circuit is connected to the second heating element through the output end.
[0021] In some embodiments, the microphone controller further includes a UI module, and the UI module is electrically connected between the voltage and current detection module and the output control module.
[0022] In a second aspect, an embodiment of the present application provides an aerosol generating device, comprising a housing and a heating circuit as described in any one of the above items, wherein the heating circuit is accommodated in a cavity provided in the housing.
[0023] The above-mentioned embodiment has at least the following beneficial effects: the heating circuit provided in the present application includes a first heating element and a second heating element. When the heating circuit is triggered and started by the microphone controller, the output end of the microphone controller outputs a driving signal to conduct the current loop between the first heating element and the power supply and the current loop between the second heating element and the power supply, thereby increasing the aerosol output of the aerosol generating device, thereby improving the user's smoking experience, and at the same time being conducive to the miniaturization design of the electronic atomizer. BRIEF DESCRIPTION OF THE DRAWINGS
[0024] One or more embodiments are exemplarily described by pictures in the corresponding drawings, and these exemplified descriptions do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and unless otherwise stated, the figures in the drawings do not constitute proportional limitations.
[0025] Figure 1 A schematic diagram of a heating circuit for an aerosol generating device provided in an embodiment of the present application;
[0026] Figure 2 for Figure 1 A circuit connection diagram;
[0027] Figure 3 for Figure 1 A schematic diagram of the structure of a microphone controller;
[0028] Figure 4 A schematic diagram of the structure of another heating circuit for an aerosol generating device provided in an embodiment of the present application;
[0029] Figure 5 for Figure 4 A circuit connection diagram;
[0030] Figure 6 A schematic diagram of the structure of another heating circuit for an aerosol generating device provided in an embodiment of the present application;
[0031] Figure 7 for Figure 6 A circuit connection diagram;
[0032] Figure 8 A schematic structural diagram of an aerosol generating device provided in an embodiment of the present application. DETAILED DESCRIPTION
[0033] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.
[0034] See also Figure 1 , Figure 1 This is a schematic diagram of a heating circuit for an aerosol generating device provided in an embodiment of the present application. Figure 1 As shown, the heating circuit 100 includes a power supply 10 , a first heating element 20 , a second heating element 30 , a first switch circuit 40 and a microphone controller 50 .
[0035] It should be noted that the present application is applicable to the scenario where the first heating element 20 and the second heating element 30 are started and turned off at the same time.
[0036] The power supply 10 is used to provide electric power.
[0037] In one example, the positive electrode of the power supply 10 is electrically connected to the microphone controller 50 and the first heating element 20 respectively, and the negative electrode of the power supply 10 is grounded. The power supply 10 is used to provide power for the microphone controller 50 and the first switching circuit 40.
[0038] like Figure 2 As shown, the power supply 10 includes a battery cell BAT1, which is used to provide power to the microphone controller U1 and to provide power to the NMOS tube Q1 through the heating wire RL1. It can be understood that the energy storage capacity and continuous discharge capacity of the battery cell BAT1 can be selected according to the actual needs of the heating circuit 100.
[0039] The resistance values of the first heating element 20 and the second heating element 30 are substantially the same.
[0040] In some embodiments, the resistance values of the first heating element 20 and the second heating element 30 can be selected according to the actual circuit, and are not limited to being substantially the same.
[0041] In the embodiment of the present application, the first heating element 20 includes a heating wire, and the second heating element 30 includes a heating wire. In one example, the heating wires of the first heating element 20 and the second heating element 30 are wound according to a preset shape and arranged along the axial direction. It can be understood that the first heating element 20 and the second heating element 30 can also be any combination of heating needles, heating sheets, heating rods, and heating nets, that is, the types of the first heating element 20 and the second heating element 30 can be the same or different.
[0042] like Figure 2 As shown, the first heating element 20 includes a heating wire RL1, and the second heating element 30 includes a heating wire RL2. In this case, the heating circuit 100 is a double heating wire circuit.
[0043] The first switch circuit 40 is electrically connected between the power supply 10 and the first heating element 20. The first switch circuit 40 is connected to the output terminal 50a, and is used to receive a driving signal and conduct a current loop between the first heating element 40 and the power supply 10 when the microphone controller 50 is triggered to start.
[0044] In the embodiment of the present application, the first switch circuit 40 includes an NMOS tube, the gate of the NMOS tube is electrically connected to the output end 50a of the microphone controller 50, the drain of the NMOS tube is electrically connected to the first heating element 20, and the source of the NMOS tube is grounded.
[0045] like Figure 2 As shown, the first switch circuit 40 includes an NMOS tube Q1, and the NMOS tube Q1 corresponds to the heating wire RL1. The gate of the NMOS tube Q1 is electrically connected to the OUT end (i.e., the output end 50a) of the microphone controller 50, the drain of the NMOS tube Q1 is electrically connected to one end of the heating wire RL1, and the other end of the heating wire RL1 is configured as the power supply voltage VCC provided by the power supply 10, and the source of the NMOS tube Q1 is grounded.
[0046] The continuous drain current of the NMOS tube is greater than the short-circuit current of the first heating element 20 .
[0047] like Figure 2 As shown, when the NMOS tube Q1 is working in the on state, the current loop from the power supply voltage VCC, the heating wire RL1, the NMOS tube Q1 to the ground is selected. If the heating wire RL1 is short-circuited, a large short-circuit current is generated and flows through the heating wire RL1 and the NMOS tube Q1. Therefore, the continuous drain current of the NMOS tube Q1 needs to be greater than the short-circuit current of the heating wire RL1 to avoid burning the NMOS tube Q1.
[0048] Optionally, the drain continuous current of the NMOS tube is in the order of tens of amperes. The short-circuit current of the heating wire RL1 is generally in the order of tens of amperes. If the drain continuous current of the NMOS tube Q1 is greater than the short-circuit current of the heating wire RL1, the drain continuous current of the NMOS tube can also be set to be in the order of tens of amperes.
[0049] In some embodiments, the first switch circuit 40 includes but is not limited to high-power switch devices such as transistors, triodes, IGBTs or thyristors, as long as the output terminal 50a of the microphone controller 50 outputs a driving signal to drive the first switch circuit 40 to turn on or off.
[0050] The microphone controller 50 is electrically connected to the power supply 10 and has an output terminal 50a for outputting a driving signal. The second heating element 30 is electrically connected to the output terminal 50a, and the microphone controller 50 is electrically connected between the second heating element 30 and the power supply 10, and is used to conduct the current loop between the second heating element 30 and the power supply 10 when triggered to start.
[0051] It can be seen that the output end 50a of the microphone controller 50 is electrically connected to the first switch circuit 40 and the second heating element 30 respectively, and the output end 50a outputs a driving signal to act on the first switch circuit 40 and the second heating element 30 at the same time, so as to realize simultaneous startup or shutdown of the first heating element 20 and the second heating element 30.
[0052] like Figure 2 As shown, the microphone controller 50 includes a microphone control chip U1, and the microphone control chip U1 includes a MIC terminal, a VCC terminal, a GND terminal and an OUT terminal, and the OUT terminal is the output terminal 50a.
[0053] In one example, the driving signal is a rectangular wave signal. Figure 3 As shown, the microphone controller 50 further includes an input terminal 50 b, and the input terminal 50 b is configured to receive an external trigger signal.
[0054] The microphone controller 50 also includes a power supply terminal 50c, a ground terminal 50d, an airflow detection module 501, an output control module 402, a pulse width modulation module 403, a voltage and current detection module 404, and a second switch circuit 404. The power supply terminal 50c and the ground terminal 50d are electrically connected to the power supply 10; the airflow detection module 501, the output control module 502, the pulse width modulation module 503 and the second switch circuit 504 are electrically connected in sequence, and the second switch circuit 504 is connected to the second heating element 30 through the output terminal 50a.
[0055] The airflow detection module 501 is also electrically connected to the input terminal 50b, and the second switch circuit 504 is also electrically connected to the power supply terminal 50c, the output terminal 50a and the voltage and current detection module 505 respectively.
[0056] The microphone controller 50 further includes a protection module 506 , which is electrically connected between the voltage and current detection module 505 and the output control module 502 .
[0057] If the input terminal 50b is externally connected to a microphone sensor, when the aerosol generating device has an inhalation action, the microphone sensor outputs a corresponding capacitance signal, the airflow detection module 501 detects the capacitance signal and outputs a response signal, and the output control module 502 controls the pulse width modulation module 503 and the voltage and current detection module 504 to start according to the response signal. If the input terminal 50b is configured to receive a change in airflow caused by an inhalation action, the airflow detection module 501 detects the change in airflow and outputs a response signal, and the output control module 402 controls the pulse width modulation module 503 and the voltage and current detection module 504 to start according to the response signal.
[0058] In one example, the second switch circuit 504 includes a MOS tube, and the pulse width modulation module 503 is configured to control the on and off of the MOS tube. When the MOS tube is in the on state, the output terminal 50a of the microphone controller 50 outputs a driving signal. It can be understood that the MOS tube here can be designed as an NMOS tube or a PMOS tube according to actual needs.
[0059] In an aerosol generating device in which dual heating wires or multiple heating wires are started simultaneously, the microphone controller 50 can directly drive the heating element connected to the output terminal 50a of the microphone controller 50 by integrating the second switching circuit 504 internally, without the need to separately set up a driving circuit composed of high-power switching devices, which can reduce the volume of the aerosol generating device, is conducive to miniaturized design, and reduces the cost of the aerosol generating device.
[0060] Furthermore, the microphone controller 50 also includes a UI module 507 , which is electrically connected between the voltage and current detection module 505 and the output control module 502 .
[0061] In one example, the UI module 507 may be used to display the working status of the aerosol generating device, the number of puffs taken by the user, etc., which may enhance the user experience.
[0062] like Figure 2 As shown, the working principle of the heating circuit 100 of the embodiment of the present application is: when the microphone controller 50 is triggered to start, the output terminal 50a outputs a rectangular wave signal, and the rectangular wave signal drives the heating wire RL2 to start heating; when the rectangular wave signal is at a high level, the NMOS tube Q1 is driven to work in a conducting state, and the current loop from the power supply 10, the heating wire RL1, and the NMOS tube Q1 to the ground is selected, so that the heating wire RL1 starts to be energized and heated, thereby realizing the heating of the heating wire RL1 and the heating wire RL2 at the same time. Please refer to Figure 4 , Figure 4 This is a schematic diagram of another heating circuit for an aerosol generating device provided in an embodiment of the present application. Figure 4As shown, the heating circuit includes a power supply 10 , a first heating element 201 . . . an Nth heating element 20N, a second heating element 30 , a first switch circuit 401 . . . an Nth switch circuit 40N and a microphone controller 50 .
[0063] Among them, the first switch circuit 401 is electrically connected between the power supply 10 and the first heating element 201. The first switch circuit 401 is connected to the output terminal 50a, and is used to receive the drive signal and conduct the current loop between the first heating element 201 and the power supply 10 when the microphone controller 50 is triggered and started. Similarly, the first switch circuit 40N is electrically connected between the power supply 10 and the Nth heating element 20N. The first switch circuit 40N is connected to the output terminal 50a, and is used to receive the drive signal and conduct the current loop between the Nth heating element 20N and the power supply 10 when the microphone controller 50 is triggered and started.
[0064] The resistance values of the first heating element 201 . . . to the Nth heating element 20N may be the same or different, and the heating areas of the first heating element 201 . . . to the Nth heating element 20N may be the same or different.
[0065] like Figure 5 As shown, the first heating element 201 includes a heating wire RL11, the Nth heating element 20N includes a heating wire RL1n, and the second heating element 30 includes a heating wire RL2. At this time, the heating circuit 100 is a multi-heating wire circuit. Correspondingly, the first switch circuit 401 includes an NMOS transistor Q11, the Nth switch circuit 40N includes an NMOS transistor Q1n.
[0066] Among them, the gate of the NMOS tube Q11 is electrically connected to the OUT end (i.e., the output end 50a) of the microphone controller 50, the drain of the NMOS tube Q11 is electrically connected to one end of the heating wire RL11, the other end of the heating wire RL11 is configured to receive the power supply voltage VCC provided by the power supply 10, and the source of the NMOS tube Q11 is grounded. Similarly, the gate of the NMOS tube Q1n is electrically connected to the OUT end (i.e., the output end 50a) of the microphone controller 50, the drain of the NMOS tube Q1n is electrically connected to one end of the heating wire RL1n, the other end of the heating wire RL1n is configured to receive the power supply voltage VCC provided by the power supply 10, and the source of the NMOS tube Q1n is grounded.
[0067] See also Figure 6 , Figure 6 This is a schematic diagram of the structure of another heating circuit for an aerosol generating device provided in an embodiment of the present application. Figure 6 As shown, the heating circuit further includes a delay circuit 60 , and the delay circuit 60 is electrically connected between the output terminal 50 a of the microphone controller 50 and the first switch circuit 40 .
[0068] When the heating circuit includes a first switch circuit 401 ... an Nth switch circuit 40N, one end of the delay circuit 60 is electrically connected to the output end 50a of the microphone controller 50, and the other end of the delay circuit 60 is electrically connected to the first switch circuit 401 ... an Nth switch circuit 40N, respectively, for delaying the arrival time of the output drive signal of the output end 50a of the first switch circuit 401 ... an Nth switch circuit 40N.
[0069] Specifically, Figure 7 As shown, the delay circuit 60 includes a diode D1, a resistor R1 and a capacitor C1, the anode of the diode D1 is electrically connected to the output terminal 50a of the microphone controller 50 and one end of the second heating element 30 (the heating wire RL2 as shown in the figure), the cathode of the diode D1 is electrically connected to one end of the resistor R1, the other end of the resistor R1 is electrically connected to one end of the capacitor C1 and the first switch circuit 40 (the gate of the NMOS tube Q1 as shown in the figure), and the other end of the capacitor C1 is grounded.
[0070] In some embodiments, diode D1 may be omitted.
[0071] like Figure 7 As shown, the working principle of the heating circuit of the embodiment of the present application is as follows: when the microphone controller 50 is triggered to start, the output terminal 50a outputs a rectangular wave signal, and the rectangular wave signal drives the heating wire RL2 to start heating; when the rectangular wave signal is at a high level, the diode D1 is turned on, and then the high-level signal passes through the delay circuit composed of the resistor R1 and the capacitor C1, and a certain delay is generated to reach the gate of the NMOS tube Q1, driving the NMOS tube Q1 to work in the on state, and the current loop from the power supply 10, the heating wire RL1, and the NMOS tube Q1 to the ground is selected, so that the heating wire RL1 starts to be energized and heated. It can be seen that the heating wire RL1 is slightly slower than the heating wire RL2, and the time interval between the heating wire RL1 and the heating wire RL2 is tens of milliseconds, and the heating of the heating wire RL1 and the heating wire RL2 is almost synchronous.
[0072] In addition, the filtering effect of the resistor R1 and the capacitor C1 can enhance the anti-interference capability of the heating circuit 100 and prevent the NMOS transistor Q1 from being mis-conducted due to noise or a large spike pulse, thereby causing a circuit failure.
[0073] In summary, when the embodiment of the present application is triggered and started by the microphone controller, the output end of the microphone controller outputs a driving signal to conduct the current loop between the first heating element and the power supply and the current loop between the second heating element and the power supply, thereby increasing the aerosol output of the aerosol generating device, thereby improving the user's smoking experience and facilitating the miniaturization design of the electronic atomizer.
[0074] See also Figure 8 , Figure 8This is a schematic diagram of the structure of an aerosol generating device provided in an embodiment of the present application. Figure 8 As shown, the aerosol generating device 300 comprises a housing 200 and a heating circuit 100 as described in any of the above embodiments, and the heating circuit 100 is accommodated in a cavity provided in the housing 200 .
[0075] It should be noted that the aerosol generating device 300 has the same structural connection and functional implementation as the heating circuit 100 described in any of the above embodiments, which will not be repeated here.
[0076] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Under the concept of the present application, the technical features in the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other changes in different aspects of the present application as described above, which are not provided in detail for the sake of simplicity. Although the present application has been described in detail with reference to the aforementioned embodiments, a person of ordinary skill in the art should understand that the technical solutions described in the aforementioned embodiments can still be modified, or some of the technical features can be replaced by equivalents. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.
Claims
1. A heating circuit for an aerosol generating device, characterized in that: include: A power source for providing electrical power; a first heating element; a second heating element; A first switch circuit, electrically connected between the power source and the first heating element; A microphone controller, electrically connected to the power supply and having an output terminal for outputting a driving signal; The first switch circuit is connected to the output end, and is used to receive a driving signal and conduct a current loop between the first heating element and the power supply when the microphone controller is triggered to start; The second heating element is electrically connected to the output end, and the microphone controller is electrically connected between the second heating element and the power supply, and is used to conduct a current loop between the second heating element and the power supply when triggered to start.
2. The heating circuit according to claim 1, characterized in that: The heating circuit also includes a delay circuit, which is electrically connected between the output end of the microphone controller and the first switch circuit.
3. The heating circuit according to claim 2, characterized in that: The delay circuit includes a diode, a resistor and a capacitor, the anode of the diode is electrically connected to the output end of the microphone controller and one end of the second heating element respectively, the cathode of the diode is electrically connected to one end of the resistor, the other end of the resistor is electrically connected to one end of the capacitor and the first switch circuit respectively, and the other end of the capacitor is grounded.
4. The heating circuit according to claim 1, characterized in that: The first switch circuit includes an NMOS tube, a gate of the NMOS tube is electrically connected to the output end of the microphone controller, a drain of the NMOS tube is electrically connected to the first heating element, and a source of the NMOS tube is grounded.
5. The heating circuit according to claim 4, characterized in that: The continuous drain current of the NMOS tube is greater than the short-circuit current of the first heating element.
6. The heating circuit according to claim 1, characterized in that: The first switch circuit includes a transistor, a triode, an IGBT or a thyristor.
7. The heating circuit according to claim 1, characterized in that: The resistance values of the first heating element and the second heating element are substantially the same.
8. The heating circuit according to claim 1, characterized in that: The microphone controller also includes a power supply terminal, a ground terminal, an airflow detection module, an output control module, a pulse width modulation module, a voltage and current detection module and a second switch circuit; The power supply terminal and the ground terminal are electrically connected to the power supply; The airflow detection module, the output control module, the pulse width modulation module and the second switch circuit are electrically connected in sequence, and the second switch circuit is connected to the second heating element through the output end.
9. The heating circuit according to claim 8, characterized in that: The microphone controller also includes a UI module, and the UI module is electrically connected between the voltage and current detection module and the output control module.
10. An aerosol generating device, characterized in that: It comprises a shell and a heating circuit as claimed in any one of claims 1 to 9, wherein the heating circuit is accommodated in a cavity provided in the shell.