WO2022247590A1

WO2022247590A1 - Aerosol forming apparatus and heating assembly detection method thereof

Info

Publication number: WO2022247590A1
Application number: PCT/CN2022/090905
Authority: WO
Inventors: 梁峰; 陈海超; 陈俊梁
Original assignee: 深圳麦时科技有限公司
Priority date: 2021-05-26
Filing date: 2022-05-05
Publication date: 2022-12-01
Also published as: CN113424990A

Abstract

An aerosol forming apparatus and a heating assembly (20) detection method thereof. The heating assembly (20) detection method of the aerosol forming apparatus comprises: controlling a resonant circuit (12) to perform resonance after heating starting information is received (S10); generating synchronization information according to the resonance (S20); and determining the state of the heating assembly (20) according to the synchronization information (S30).

Description

Aerosol forming device and testing method for heating components thereof

technical field

The invention relates to the field of atomization equipment, in particular to an electromagnetically heated aerosol forming device and a detection method for a heating component thereof.

Background technique

The heat-not-burn device is a kind of electronic atomization device, which generates aerosol for users to inhale through low-temperature baking. Compared with traditional burning cigarettes, the harmful components in the aerosol produced by it are greatly reduced, that is, compared with smoking traditional cigarettes, it is healthier to use a heat-not-burn device to generate aerosol for smoking Way. In heat-not-burn devices, the heating element is a key component.

At present, the heat-not-burn device with detachable and replaceable heating element has been launched in the market. In practical applications, when the heating element is disassembled and a new heating element is not installed, starting the heat-not-burn device will not only increase energy consumption, but also increase potential safety hazards. Based on this, there is a need for an aerosol forming device capable of detecting the state of the heating element.

technical problem

The technical problem to be solved by the present invention is that the aerosol forming device in the prior art cannot detect the state of the heating component.

technical solution

The technical solution adopted by the present invention to solve the technical problem is to construct a heating component detection method of an aerosol forming device, the aerosol forming device includes a heating component and a resonant circuit, and the method includes:

After receiving the heating start information, controlling the resonant circuit to resonate;

generating synchronization information based on the resonance;

The state of the heating assembly is determined according to the synchronization information.

Preferably, said generating synchronization information according to said resonance includes:

The voltage of the switching tube of the resonant circuit is compared with a preset voltage, and synchronous information is generated according to the comparison result.

Preferably, the synchronization information includes the number of pulses, and the determining the state of the heating component according to the synchronization information includes:

A state of the heating assembly is determined based on the number of pulses.

Preferably, the synchronization information includes the decay time of the resonance signal, and the determining the state of the heating component according to the synchronization information includes:

The state of the heating assembly is determined based on the decay time of the resonance signal.

Preferably, the state of the heating component includes: the heating component is installed with a heating element; the heating component is not installed with a heating element.

Preferably, the controlling the resonant circuit to resonate includes:

The resonant circuit is controlled to generate a resonant signal with a predetermined period.

The present invention also constructs an aerosol forming device, including a resonant circuit and a heating assembly, and the aerosol forming device also includes a control module;

The control module is used to control the resonant circuit to resonate after receiving the heating start signal, generate synchronization information according to the resonance of the resonant circuit, and determine the state of the heating component according to the synchronization information.

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

The voltage of the switching tube of the resonant circuit is compared with the preset voltage, and synchronous information is generated according to the comparison result.

Preferably, the synchronization information includes a number of pulses, and the determining the state of the heating component according to the synchronization information includes: determining the state of the heating component according to the number of pulses.

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

Preferably, the control module includes a main control unit and a comparator, the inverting input terminal of the comparator is connected to the first terminal of the switch tube, the non-inverting input terminal of the comparator is connected to a reference voltage, and the comparator The output terminal of the device is connected to the input terminal 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 component is installed with a heating element, so as to make the resonant circuit resonate, and provide The heating element in the heating assembly is heated.

Preferably, it also includes a temperature detection module, wherein,

The temperature detection module is used to detect the temperature of the heating element to obtain a temperature detection value, and send it to the control module;

The control module is also used to adjust the duty cycle of the power control signal according to the temperature detection value and the target temperature, so as to adjust the output power.

Beneficial effect

Implementing the technical solution of the present invention, the control module controls the resonant circuit to resonate after receiving the heating start information, and generates synchronous information according to the resonance, and determines the state of the heating component according to the synchronous information. The detection method of the heating component can not only realize When heating, it automatically detects whether the heating element is installed with a heating element, which reduces unnecessary power consumption and improves safety. Moreover, because it is a non-contact detection method, it has stronger applicability and fewer restrictions.

Description of drawings

The present invention will be further described below in conjunction with accompanying drawing and embodiment, in the accompanying drawing:

Fig. 1 is the structural exploded diagram of Embodiment 1 of the aerosol forming device of the present invention;

Fig. 2 is a logical structure diagram of Embodiment 2 of the aerosol forming device of the present invention;

Fig. 3 is the circuit diagram of Embodiment 3 of the aerosol forming device of the present invention;

Fig. 4A is a waveform diagram of the detection process when the heating element exists;

Fig. 4B is a waveform diagram of the detection process when the heating element does not exist;

Fig. 5 is a flow chart of Embodiment 1 of the detection method of the heating element of the aerosol forming device of the present invention.

Embodiments of the present invention

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

As shown in FIG. 1 , the aerosol-forming device of the present invention mainly includes: a control board 10 , a heating component 20 , a battery 30 , a mounting cylinder 40 and an aerosol-forming substrate (such as a cigarette) 50 . Referring to FIG. 2 , the control board 10 includes a control module 11 and a resonant circuit 12 . Wherein, the resonant circuit 12 includes a resonant coil L1, and the heating assembly 20 is placed in the resonant coil L1. The battery 30 is used to provide energy to the control module 11 and the resonant coil L1. The mounting barrel 40 is used to accommodate an aerosol-forming substrate (eg, a cigarette stick) 50 and form an airflow channel. Moreover, the control module 11 is used 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, wherein the heating assembly 20 The states include: the heating element 20 is installed with a heating element; the heating element 20 is not installed with a heating element.

In an optional embodiment, the generation of synchronous information by the control module 11 according to the resonance of the resonant circuit 12 includes: comparing the voltage of the switching transistor of the resonant circuit 12 with a preset voltage, and generating synchronous information according to the comparison result.

In an optional embodiment, the synchronization information includes the number of pulses, and determining the state of the heating assembly 20 according to the synchronization information includes: determining the state of the heating assembly 20 according to the number of pulses. In this embodiment, since there is no heating body in the magnetic field of the resonant coil, the energy in the resonant coil is only consumed by the resonant coil during the oscillation process, and the impedance of the resonant coil is relatively small, and the consumption process will be relatively slow , the result reflected on the resonant coil is that there are more periods of oscillation; and when there is a heating element in the magnetic field of the resonant coil, the energy in the resonant coil will be consumed by the resonant coil, and most of the energy will pass through electromagnetic induction. Consumed by the heating body, the result reflected on the resonant coil at this time is that the oscillation period becomes less. Therefore, according to the different performance of the resonance signal of the resonance coil, it can be judged whether there is a heating element inside the resonance coil through the change of the number of pulses in the synchronization information.

In another optional embodiment, the synchronization information includes the decay time of the resonance signal, and determining the state of the heating assembly 20 according to the synchronization information includes: determining the state of the heating assembly 20 according to the decay time of the resonance signal. In this embodiment, since there is no heating body in the magnetic field of the resonant coil, the energy in the resonant coil is only consumed by the resonant coil during the oscillation process, and the impedance of the resonant coil is relatively small, and the consumption process will be relatively slow , the result reflected on the resonant coil is that the decay time of the resonant signal is slow, that is, the amplitude change is small; and when there is a heating element in the magnetic field of the resonant coil, the energy in the resonant coil will be consumed by the resonant coil, Most of the energy will be consumed by the heating element through electromagnetic induction, and the result reflected on the resonant coil at this time is that the decay time of the resonant signal is faster, that is, the amplitude changes greatly. Therefore, according to the different performance of the resonance signal of the resonance coil, it can be judged whether there is a heating element inside the resonance coil through the magnitude of the amplitude change of the resonance signal in the synchronous information.

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

The working principle of this embodiment is described below: after the main control unit 111 receives the heating start signal, it sends a test signal to the resonant circuit 12, and the test signal is a trigger signal of only one pulse, as shown in Figures 4A and 4B. . After the test signal is sent out, the resonant circuit 12 starts to oscillate for several cycles, and energy is transferred to the heating element 20 during the oscillation process, and at the same time, energy is consumed by itself until the energy on the resonant circuit 12 is exhausted, as shown in Figures 4A and 4B The resonance signal shown. During this process, the synchronous detection unit 112 will compare the drain voltage of the MOS transistor Q1 in the resonant circuit 12 with a reference voltage Vref, and output a synchronous signal, which is a high-low level pulse signal with a certain width, specifically Ground, when the drain voltage of the MOS transistor Q1 is greater than the reference voltage Vref, the comparator U1 outputs a low level; otherwise, 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 judges whether there is a heating element in the heating assembly according to the characteristics of the synchronization signal.

In a specific embodiment, the reference voltage Vref input by the comparator U1 is a voltage of 0V or a voltage slightly greater than 0. , and the synchronous signals are shown in Figure 4A and 4B respectively: when the heating element is installed with a heating element, the energy in the resonant coil will be consumed by the heating element through electromagnetic induction except that the energy in the resonant coil will be consumed by the heating element. The result reflected on the resonant coil is that the oscillation cycle becomes less, as shown in Figure 4A; on the contrary, when the heating element is not installed with a heating element, the energy in the resonant coil is only consumed by the resonant coil during the oscillation process, because The impedance of the resonant coil is relatively small, and the consumption process will be relatively slow. The result reflected on the resonant coil is that there are more oscillation cycles, as shown in Figure 4B.

In a specific embodiment, the reference voltage Vref input by the comparator U1 can also be a relatively large voltage, such as half of the maximum amplitude of the resonance signal. Moreover, according to the input synchronous signal, the control module records the current time when the synchronous signal becomes low level. If the synchronous signal maintains high level within a certain period of time, it means that the resonance signal is lower than the reference voltage value. At this time After the detection is over, record the current time. The difference between the two times is the decay time, and then judge whether the heating element is installed with a heating element 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 component is installed with a heating element, so that all The resonant circuit resonates, and heats the heating element in the heating component. In this embodiment, when it is determined that the heating element is installed with a heating element, it can enter the normal working mode. At this time, the control module can output a power control signal according to the synchronization signal, and the power control signal is a PWM signal.

Further, the aerosol forming device of the present invention further includes a temperature detection module, such as a PTC thermistor disposed on the heating element. Moreover, the temperature detection module is used to detect the temperature of the heating element to obtain the temperature detection value and send it to the control module; the control module is also used to adjust the duty cycle of the power control signal according to the temperature detection value and the target temperature to adjust the output power.

Finally, it should be noted that the control module can also determine whether the heating element is equipped with a heating element according to the temperature detection value input by the temperature detection module, or determine whether the heating element is equipped with a heating element by judging whether there is a conductive track.

Fig. 5 is a flow chart of Embodiment 1 of the detection method of the heating component of the aerosol forming device of the present invention. In combination with Figs. 1 and 2, the detection method of the heating component of this embodiment includes the following steps:

Step S10. After receiving the heating start information, control the resonant circuit to resonate;

Step S20. Generate synchronization information according to the resonance;

Step S30. Determine the state of the heating assembly according to the synchronization information, wherein the state of the heating assembly includes: the heating assembly is equipped with a heating element; the heating assembly is not installed with a heating element.

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

Further, in an optional embodiment, the synchronization information includes a number of pulses, and determining the state of the heating component according to the synchronization information includes: determining the state of the heating component according to the number of pulses.

Further, in an optional embodiment, the synchronization information includes the decay time of the resonance signal, and determining the state of the heating assembly according to the synchronization information includes: determining the state of the heating assembly according to the decay time of the resonance signal. state.

In an optional embodiment, the controlling the resonant circuit to resonate includes: controlling the resonant circuit to generate a resonant signal of a predetermined period.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of the claims of the present invention.

Claims

A method for detecting a heating component of an aerosol forming device, the aerosol forming device comprising a heating component and a resonant circuit, characterized in that the method comprises:

After receiving the heating start information, controlling the resonant circuit to resonate;

generating synchronization information based on the resonance;

The state of the heating assembly is determined according to the synchronization information.
The heating assembly detection method according to claim 1, wherein said generating synchronization information according to said resonance comprises:

The voltage of the switching tube of the resonant circuit is compared with a preset voltage, and synchronous information is generated according to the comparison result.
The heating component detection method according to claim 1, wherein the synchronization information includes the number of pulses, and determining the state of the heating component according to the synchronization information comprises:

A state of the heating assembly is determined based on the number of pulses.
The heating assembly detection method according to claim 1, wherein the synchronization information includes the decay time of the resonance signal, and determining the state of the heating assembly according to the synchronization information includes:

The state of the heating assembly is determined based on the decay time of the resonance signal.
The heating assembly detection method according to any one of claims 1-4, wherein the state of the heating assembly includes: the heating assembly is installed with a heating element; the heating assembly is not installed with a heating element.
The heating element detection method according to any one of claims 1-4, wherein the controlling the resonant circuit to resonate comprises:

The resonant circuit is controlled to generate a resonant signal with a predetermined period.
An aerosol forming device, comprising a resonant circuit and a heating assembly, characterized in that the aerosol forming device also includes a control module;

The control module is used to control the resonant circuit to resonate after receiving the heating start signal, generate synchronization information according to the resonance of the resonant circuit, and determine the state of the heating component according to the synchronization information.
The aerosol forming device according to claim 7, wherein the synchronous information generation according to the resonance of the resonant circuit comprises:

The voltage of the switching tube of the resonant circuit is compared with the preset voltage, and synchronous information is generated according to the comparison result.
The aerosol forming device according to claim 7, wherein the state of the heating component includes: the heating component is installed with a heating element; the heating component is not installed with a heating element.
The aerosol forming device according to claim 7, wherein the synchronization information includes the number of pulses, and the determining the state of the heating component according to the synchronization information comprises: determining the state of the heating component according to the number of pulses status.
The aerosol forming device according to claim 7, wherein the synchronization information includes the decay time of the resonance signal, and the determining the state of the heating component according to the synchronization information includes:

The state of the heating assembly is determined based on the decay time of the resonance signal.
The aerosol forming device according to any one of claims 7-11, characterized in that, the resonant circuit includes a resonant coil, a capacitor (C1) and a switch tube (Q1), wherein the switch tube (Q1) The control terminal is connected to the output terminal of the control module, the first terminal of the switching tube (Q1) is connected to the positive terminal of the battery through the resonant coil, the second terminal of the switching tube (Q1) is grounded, and the capacitor ( C1) is connected in parallel with the resonant coil.
The aerosol forming device according to claim 12, characterized in that the control module includes a main control unit and a comparator (U1), and the inverting input terminal of the comparator (U1) is connected to the switching tube (Q1 ), the non-inverting input terminal of the comparator (U1) is connected to the reference voltage, and the output terminal of the comparator (U1) is connected to the input terminal of the main control unit.
The aerosol forming device according to claim 7, wherein:

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 component is installed with a heating element, so as to make the resonant circuit resonate and provide power for the heating The heating element inside the component heats up.
The aerosol forming device according to claim 14, further comprising a temperature detection module, wherein,

The temperature detection module is used to detect the temperature of the heating element to obtain a temperature detection value, and send it to the control module;

The control module is also used to adjust the duty cycle of the power control signal according to the temperature detection value and the target temperature, so as to adjust the output power.