阅读说明：本技术 气溶胶形成装置及其加热组件检测方法 (Aerosol forming device and heating assembly detection method thereof ) 是由 梁峰 陈海超 陈俊梁 于 2021-05-26 设计创作，主要内容包括：本发明公开了一种气溶胶形成装置及其加热组件检测方法,该气溶胶形成装置的加热组件检测方法包括：在收到加热启动信息后,控制所述谐振电路进行谐振；根据所述谐振产生同步信息；根据所述同步信息确定所述加热组件的状态。实施本发明的技术方案,不但可实现在加热时自动检测加热组件是否安装有发热体,减少不必要的功耗及提高了安全性,而且,由于为非接触式检测方式,所以适用性更强、限制条件更少。(The invention discloses an aerosol forming device and a heating assembly detection method thereof, wherein the heating assembly detection method of the aerosol forming device comprises the following steps: after receiving the heating starting information, controlling the resonance circuit to resonate; generating synchronization information based on the resonance; determining a state of the heating assembly based on the synchronization information. By implementing the technical scheme of the invention, whether the heating assembly is provided with the heating body or not can be automatically detected during heating, unnecessary power consumption is reduced, and safety is improved.)

1. A method of detecting a heating element of an aerosol-forming device comprising a heating element and a resonant circuit, the method comprising:

after receiving the heating starting information, controlling the resonance circuit to resonate;

generating synchronization information based on the resonance;

determining a state of the heating assembly based on the synchronization information.

2. The heating element detection method of claim 1, wherein said generating synchronization information based on said resonance comprises:

and comparing the voltage of a switching tube of the resonant circuit with a preset voltage, and generating synchronous information according to the comparison result.

3. The heating assembly detection method of claim 1, wherein the synchronization information comprises a number of pulses, and wherein determining the state of the heating assembly based on the synchronization information comprises:

determining a state of the heating assembly based on the number of pulses.

4. The heating assembly detection method of claim 1, wherein the synchronization information comprises a decay time of a resonant signal, and wherein determining the state of the heating assembly from the synchronization information comprises:

determining a state of the heating assembly based on a decay time of the resonant signal.

5. The heating element detection method of any one of claims 1 to 4, wherein the state of the heating element comprises: the heating component is provided with a heating piece; the heating component is not provided with a heating body.

6. The heating element detecting method according to any one of claims 1 to 4, wherein the controlling the resonance circuit to resonate comprises:

controlling the resonance circuit to generate a resonance signal with a predetermined period.

7. An aerosol-forming device comprising a resonant circuit and a heating assembly, wherein the aerosol-forming device further comprises a control module;

the control module is used for controlling the resonance circuit to resonate after receiving the heating starting signal, generating synchronous information according to the resonance of the resonance circuit, and determining the state of the heating component according to the synchronous information.

8. An aerosol-forming device according to claim 7, wherein the generating synchronization information according to the resonance of the resonant circuit comprises:

and comparing the voltage of a switching tube of the resonant circuit with a preset voltage, and generating synchronous information according to the comparison result.

9. An aerosol-forming device according to claim 7, wherein the state of the heating assembly comprises: the heating component is provided with a heating body; the heating component is not provided with a heating body.

10. An aerosol forming device according to claim 7, wherein the synchronization information comprises a number of pulses, the determining the state of the heating assembly from the synchronization information comprising: determining a state of the heating assembly based on the number of pulses.

11. An aerosol-forming device according to claim 7, wherein the synchronization information comprises a decay time of a resonance signal, the determining the state of the heating assembly from the synchronization information comprising:

determining a state of the heating assembly based on a decay time of the resonant signal.

12. An aerosol-forming device according to any one of claims 7 to 11, wherein the resonant circuit comprises a resonant coil, a capacitor (C1) and a switching tube (Q1), wherein a control terminal of the switching tube (Q1) is connected to an output terminal of the control module, a first terminal of the switching tube (Q1) is connected to a positive terminal of a battery via the resonant coil, a second terminal of the switching tube (Q1) is connected to ground, and the capacitor (C1) is connected in parallel with the resonant coil.

13. An aerosol-forming device according to claim 12, wherein the control module comprises a master control unit and a comparator (U1), wherein an inverting input of the comparator (U1) is connected to the first end of the switching tube (Q1), a non-inverting input of the comparator (U1) is connected to a reference voltage, and an output of the comparator (U1) is connected to an input of the master control unit.

14. An aerosol-forming device according to claim 7,

and the control module is also used for sending a power control signal to the resonance circuit according to the synchronous information when the heating assembly is determined to be provided with the heating body, so that the resonance circuit resonates and heats the heating body in the heating assembly.

15. An aerosol-forming device according to claim 14, further comprising a temperature detection module, wherein,

the temperature detection module is used for detecting the temperature of the heating element to obtain a temperature detection value and sending the temperature detection value to the control module;

the control module is further used for adjusting the duty ratio of the power control signal according to the temperature detection value and the target temperature so as to adjust the output power.

Technical Field

The invention relates to the field of atomization equipment, in particular to an electromagnetic heating aerosol forming device and a heating assembly detection method thereof.

Background

A heated non-burning device is one type of electronic atomization device that generates aerosol for a user to smoke by low temperature baking. The harmful components in the aerosol generated by the cigarette are greatly reduced compared with the traditional combustion type cigarette, namely, the aerosol generated by the non-combustion heating device is a healthier way for smoking compared with the traditional cigarette. In the heating non-combustion device, a heating body is a key component.

At present, heating non-combustion devices with heating elements capable of being detached and replaced are already put out in the market. In practical application, when a new heating element is not installed after the heating element is disassembled, the heating non-combustion device is started, so that not only energy consumption is increased, but also potential safety hazards are increased. In view of this, there is a need for an aerosol-forming device that can detect the condition of a heating element.

Disclosure of Invention

The present invention is directed to an aerosol-forming device capable of detecting the state of a heating unit.

The technical scheme adopted by the invention for solving the technical problems is as follows: a method of constructing a heating assembly detection method for an aerosol-forming device comprising a heating assembly and a resonant circuit, the method comprising:

after receiving the heating starting information, controlling the resonance circuit to resonate;

generating synchronization information based on the resonance;

determining a state of the heating assembly based on the synchronization information.

Preferably, the generating of the synchronization information according to the resonance includes:

and comparing the voltage of a switching tube of the resonant circuit with a preset voltage, and generating synchronous information according to the comparison result.

Preferably, the synchronization information includes a number of pulses, and the determining the state of the heating assembly based on the synchronization information includes:

determining a state of the heating assembly based on the number of pulses.

Preferably, the synchronization information comprises a decay time of the resonance signal, and the determining the state of the heating assembly from the synchronization information comprises:

determining a state of the heating assembly based on a decay time of the resonant signal.

Preferably, the state of the heating assembly comprises: the heating component is provided with a heating piece; the heating component is not provided with a heating body.

Preferably, the controlling the resonance circuit to resonate comprises:

controlling the resonance circuit to generate a resonance signal with a predetermined period.

The invention also provides an aerosol-forming device comprising a resonant circuit and a heating assembly, the aerosol-forming device further comprising a control module;

the control module is used for controlling the resonance circuit to resonate after receiving the heating starting signal, generating synchronous information according to the resonance of the resonance circuit, and determining the state of the heating component according to the synchronous information.

Preferably, the generating synchronization information according to resonance of the resonance circuit includes:

and comparing the voltage of a switching tube of the resonant circuit with a preset voltage, and generating synchronous information according to the comparison result.

Preferably, the state of the heating assembly comprises: the heating component is provided with a heating body; the heating component is not provided with a heating body.

Preferably, the synchronization information includes a number of pulses, and the determining the state of the heating assembly based on the synchronization information includes: determining a state of the heating assembly based on the number of pulses.

Preferably, the synchronization information comprises a decay time of the resonance signal, and the determining the state of the heating assembly from the synchronization information comprises:

determining a state of the heating assembly based on a decay time of the resonant signal.

Preferably, the resonant circuit comprises a resonant coil, a capacitor and a switching tube, wherein the control end of the switching tube is connected to the output end of the control module, the first end of the switching tube is connected to the positive end of the battery through the resonant coil, the second end of the switching tube is grounded, and the capacitor is connected in parallel with the resonant coil.

Preferably, the control module comprises a main control unit and a comparator, wherein the inverting input end of the comparator is connected with the first end of the switching tube, the non-inverting input end of the comparator is connected with a reference voltage, and the output end of the comparator is connected with the input end of the main control unit.

Preferably, the control module is further configured to send a power control signal to the resonant circuit according to the synchronization information when it is determined that the heating element is installed on the heating assembly, so that the resonant circuit resonates and heats the heating element in the heating assembly.

Preferably, the device further comprises a temperature detection module, wherein,

the temperature detection module is used for detecting the temperature of the heating element to obtain a temperature detection value and sending the temperature detection value to the control module;

the control module is further used for adjusting the duty ratio of the power control signal according to the temperature detection value and the target temperature so as to adjust the output power.

According to the technical scheme, the control module controls the resonance circuit to resonate after receiving the heating starting information, synchronous information is generated according to the resonance, and the state of the heating assembly is determined according to the synchronous information.

Drawings

The invention will be further described with reference to the accompanying drawings and examples, in which:

FIG. 1 is an exploded view of a first embodiment of an aerosol-forming device according to the invention;

FIG. 2 is a logical block diagram of a second embodiment of an aerosol-forming device according to the invention;

figure 3 is a circuit diagram of a third embodiment of an aerosol-forming device according to the invention;

FIG. 4A is a waveform diagram of a detection process in the presence of a heating assembly;

FIG. 4B is a waveform diagram of a detection process in the absence of a heating element;

figure 5 is a flow chart of a first embodiment of a method of detecting a heating element of an aerosol-forming device according to the invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1, the aerosol-forming device of the present invention mainly includes: control panel 10, heating assembly 20, battery 30, mounting cartridge 40, and aerosol-forming substrate (e.g., cigarette) 50. Referring to fig. 2, the control board 10 includes a control module 11 and a resonance circuit 12. Wherein the resonant circuit 12 includes a resonant coil L1 and the heating element 20 is disposed within the resonant coil L1. The battery 30 is used to power the control module 11 and the resonance coil L1. The mounting cartridge 40 is for receiving an aerosol-forming substrate (e.g. a tobacco rod) 50 and forming an airflow channel. Furthermore, the control module 11 is configured to control the resonant circuit 12 to resonate after receiving the heating start signal, generate synchronization information according to the resonance of the resonant circuit 12, and determine the state of the heating assembly 20 according to the synchronization information, where the state of the heating assembly 20 includes: the heating assembly 20 is provided with a heating body; the heating unit 20 is not mounted with a heat generating body.

In an alternative embodiment, the control module 11 generating the synchronization information according to the resonance of the resonant circuit 12 comprises: and comparing the voltage of the switching tube of the resonant circuit 12 with a preset voltage, and generating synchronous information according to the comparison result.

In an alternative embodiment, the synchronization information includes a number of pulses, and determining the state of the heating assembly 20 based on the synchronization information includes: the state of the heating assembly 20 is determined according to the number of pulses. In the embodiment, when no heating element exists in the magnetic field of the resonance coil, the energy in the resonance coil is consumed by the resonance coil only in the oscillation process, the impedance of the resonance coil is relatively low, the consumption process is relatively slow, and the result reflected on the resonance coil is that the oscillation period is relatively large; when a heating element is present in the magnetic field of the resonant coil, most of the energy in the resonant coil is consumed by the heating element through electromagnetic induction, except that the energy is consumed by the resonant coil, and the result reflected on the resonant coil is that the oscillation period is reduced. Therefore, whether a heating element is present inside the resonance coil can be determined by the change in the number of pulses in the synchronization information according to the difference in the expression of the resonance signal of the resonance coil.

In another alternative embodiment, the synchronization information includes a decay time of the resonant signal, and determining the state of the heating assembly 20 based on the synchronization information includes: the state of the heating assembly 20 is determined based on the decay time of the resonant signal. In this embodiment, since the energy in the resonance coil is consumed by the resonance coil only in the oscillation process when no heating element is present in the magnetic field of the resonance coil, and the impedance of the resonance coil is relatively low, the consumption process is relatively slow, and the result reflected on the resonance coil is that the attenuation time of the resonance signal is relatively slow, that is, the amplitude change is relatively small; when a heating element exists in the magnetic field of the resonant coil, most of the energy in the resonant coil is consumed by the heating element in an electromagnetic induction mode except that the energy is consumed by the resonant coil, and the result reflected on the resonant coil is that the attenuation time of the resonant signal is relatively fast, namely, the amplitude change is relatively large. Therefore, whether the heating body exists in the resonance coil can be judged according to different expressions of the resonance signal of the resonance coil and the amplitude change of the resonance signal in the synchronous information.

Fig. 3 is a circuit diagram of a third embodiment of the aerosol-forming device of the present invention, in which the control module includes a main control unit 111 and a synchronous detection unit 112. The resonant circuit 12 includes a resonant coil L1, a capacitor C1, and a switching tube, and the switching tube is a MOS transistor Q1. The gate of the MOS transistor Q1 is connected to the output end of the main control unit 111, the drain of the MOS transistor Q1 is connected to the positive terminal VIN of the battery through the resonant coil L1, the source of the MOS transistor Q1 is grounded, and the capacitor C1 is connected in parallel to the resonant coil L1. The synchronous detection unit 112 comprises a comparator U1, resistors R1, R2, R3 and R4, wherein the inverting input end of the comparator U1 is connected with the first end of the switch tube Q1 through a resistor R1, the non-inverting input end of the comparator U1 is connected with a reference voltage (Vref), the output end of the comparator U1 is connected with the input end of the main control unit 11 through a resistor R3, a resistor R2 is connected between the inverting input end of the comparator U1 and the ground, and a resistor R4 is connected between the input end of the main control unit 11 and the ground. It should be understood that the resistors R1, R3 function as current limiting, and the resistors R2, R4 function as isolation, and may be omitted in other embodiments.

The working principle of this embodiment is explained below: after receiving the heating start signal, the main control unit 111 sends a probe signal to the resonant circuit 12, where the probe signal is a trigger signal of only one pulse, such as the probe signals shown in fig. 4A and 4B. After the probe signal has been emitted, the resonant circuit 12 starts to oscillate for a number of cycles, and during the oscillation energy is transferred to the heating element 20, while it also consumes energy itself, until the energy on the resonant circuit 12 is consumed, as shown by the resonant signal in fig. 4A, 4B. In this process, the synchronous detection unit 112 compares the drain voltage of the MOS transistor Q1 in the resonant circuit 12 with a reference voltage Vref, and outputs a synchronous signal, which is a high-low level pulse signal with a certain width, specifically, when the drain voltage of the MOS transistor Q1 is greater than the reference voltage Vref, the comparator U1 outputs a low level; on the contrary, when the drain voltage of the MOS transistor Q1 is less than or equal to the reference voltage Vref, the comparator U1 outputs a high level. The synchronization signal output by the synchronization detection unit 112 is sent to the main control unit 111, and the main control unit 111 determines whether there is a heating element in the heating assembly according to the characteristics of the synchronization signal.

In one embodiment, the reference voltage Vref input by the comparator U1 is a voltage of 0V or a voltage slightly greater than 0V, and in this case, the synchronizing signals of the heating assembly in both cases of the heating element being installed and the heating element not being installed are shown in fig. 4A and 4B: when the heating element is installed on the heating component, most of the energy in the resonant coil is consumed by the heating element in an electromagnetic induction manner except that the energy in the resonant coil is consumed by the resonant coil, and the result reflected on the resonant coil is that the oscillation period is reduced, as shown in fig. 4A; on the contrary, when the heating element is not installed, the energy in the resonant coil is consumed by the resonant coil only in the oscillation process, because the impedance of the resonant coil is relatively low, the consumption process is relatively slow, and the result reflected on the resonant coil is that the oscillation period is relatively long, as shown in fig. 4B.

In one embodiment, the reference voltage Vref input by the comparator U1 may also be a relatively large voltage, such as half the maximum amplitude of the resonant signal. And the control module records the current time when the synchronous signal is changed into the low level according to the input synchronous signal, if the synchronous signal maintains the high level in a certain time, the resonance signal is lower than the reference voltage value, the detection is finished at the moment, the current time is recorded, the difference value of the two times is the decay time, and whether the heating element is installed on the heating component is judged according to the length of the decay time.

In an optional embodiment, the control module in the aerosol-forming device of the present invention is further configured to send a power control signal to the resonant circuit according to the synchronization information when it is determined that the heating element is mounted on the heating assembly, so as to resonate the resonant circuit and heat the heating element in the heating assembly. In this embodiment, when it is determined that the heating element is installed on the heating assembly, the normal operation mode may be entered, and at this time, the control module may output a power control signal according to the synchronization signal, where the power control signal is a PWM signal having a certain duty ratio.

Further, the aerosol-forming device of the present invention further includes a temperature detection module, such as a PTC thermistor, provided on the heat-generating body. The temperature detection module is used for detecting the temperature of the heating body to obtain a temperature detection value and sending the temperature detection value to the control module; the control module is further used for adjusting the duty ratio of the power control signal according to the temperature detection value and the target temperature so as to adjust the output power.

Finally, it should be noted that the control module may further determine whether the heating assembly is installed with a heating element according to a temperature detection value input by the temperature detection module, or determine whether the heating assembly is installed with a heating element by determining whether there is a conductive trace.

Fig. 5 is a flowchart of a first embodiment of a method for detecting a heating element of an aerosol-forming device according to the present invention, and with reference to fig. 1 and 2, the method for detecting a heating element of this embodiment includes the following steps:

s10, after receiving heating starting information, controlling the resonance circuit to resonate;

s20, generating synchronous information according to the resonance;

s30, determining the state of the heating assembly according to the synchronization information, wherein the state of the heating assembly comprises the following steps: the heating component is provided with a heating piece; the heating component is not provided with a heating body.

Further, in an optional embodiment, the generating synchronization information according to the resonance comprises:

and comparing the voltage of a switching tube of the resonant circuit with a preset voltage, and generating synchronous information according to the comparison result.

Further, in an alternative embodiment, the synchronization information includes a number of pulses, and determining the state of the heating assembly based on the synchronization information includes: determining a state of the heating assembly based on the number of pulses.

Further, in an optional embodiment, the synchronization information comprises a decay time of the resonance signal, and determining the state of the heating assembly based on the synchronization information comprises: determining a state of the heating assembly based on a decay time of the resonant signal.

In an optional embodiment, the controlling the resonant circuit to resonate comprises: controlling the resonance circuit to generate a resonance signal with a predetermined period.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.