EP4620331A1

EP4620331A1 - Aerosol generating device, and temperature control method and device therefor

Info

Publication number: EP4620331A1
Application number: EP23893357.6A
Authority: EP
Inventors: Qingqing YUAN; Shuai WANG; Taowen LIU; Hongming Zhou; Rihong Li; Shuowei PI; Xingjia GUO; Xiong Yu
Original assignee: Smoore International Holdings Ltd
Current assignee: Smoore International Holdings Ltd
Priority date: 2022-11-21
Filing date: 2023-09-11
Publication date: 2025-09-24
Also published as: WO2024109264A1; EP4620331A4; CN115778006A

Abstract

An aerosol generation device, and a temperature control method and device. The aerosol generation device comprises: a power supply module (110), a control module (120), a heating circuit (130), and a detection circuit (140). The power supply module (110) is used for providing energy to the heating circuit (130). The control module (120) is used for obtaining an electrical signal of an electromagnetic heating element in the heating circuit (130) by means of the detection circuit (140); and when it is detected that an abrupt change occurs in the electrical signal of the electromagnetic heating element, controlling the working time of the heating circuit (130) according to a preset correspondence, so as to control the temperature of the electromagnetic heating element, wherein the preset correspondence is a correspondence between electrical signal variables and temperature variables.

Description

CROSS-REFERENCE TO RELATED APPLICATION

This application claims priority to Chinese Patent Application No. 202211454965.9, filed with the China National Intellectual Property Administration on November 21, 2022 and entitled "Aerosol Generation Device, and Temperature Control Method and Device therefor", which is incorporated herein by reference in its entirety.

TECHNICAL FIELD

The present invention relates to the field of atomization device technology, and particularly to an aerosol generation device, and a temperature control method and apparatus thereof.

BACKGROUND

The operating principle of the aerosol generation device is mainly to heat the atomization medium in the electromagnetic induction heating mode by means of atomization to evaporate the atomization medium into the aerosol, which is then inhaled by a consumer to achieve a smoking experience. Since the electromagnetic heating has the advantages of rapid temperature rise and energy conservation, it is more conducive to the rapid control of an aerosol generation device.
The conventional temperature control technology mainly measures a DC current at the power supply terminl of a heating circuit and controls a temperature of a heating component according to the DC current. For the aerosol generation device that uses the electromagnetic heating mode, since a heating module is made of a magnetic material, and the magnetic material has a Curie temperature, that is, when the heating module reaches the Curie temperature, magnetic permeability and electrical conductivity may change suddenly, which may cause a sudden change in inductance and resistance, and then lead to unclear correspondence between the DC current and the temperature of the heating component, which results in an inaccuracy of temperature control through the measurement of the DC current in the circuit in the conventional technology.

SUMMARY

In view of this, in order to address the above technical problem, it is necessary to provide an aerosol generation device, and a temperature control method and apparatus thereof capable of improving accuracy of temperature control.
In the first aspect of the present application, an aerosol generation device is provided, including a power supply module, a control module, a heating circuit, and a detection circuit;

the power supply module is connected to provide energy to the heating circuit; and
the control module is configured to obtain an electrical signal of an electromagnetic heating component in the heating circuit through the detection circuit, and control operating time of the heating circuit according to a preset corresponding relationship after a sudden change in the electrical signal of the electromagnetic heating component is detected, to control a temperature of the electromagnetic heating component; the preset corresponding relationship is provided between an electrical signal variation and a temperature variation.

In an embodiment, the heating circuit comprises a first capacitor, a second capacitor, the electromagnetic heating component, and a first switch,

the first switch is connected to the first capacitor in parallel,
a first terminal of the second capacitor is connected to a first terminal of the first capacitor, and a second terminal of the second capacitor is connected to a first terminal of the electromagnetic heating component, the first terminal of the second capacitor is further connected to the power supply module,
a second terminal of the electromagnetic heating component is connected to the second terminal of the first capacitor and is grounded respectively,
the detection circuit is connected to the electromagnetic heating component in parallel, and is configured to detect the electrical signal of the electromagnetic heating component.

In an embodiment, the heating circuit further includes a third capacitor, a fourth capacitor, the electromagnetic heating component, a second switch, and a first resistor,

the second switch is connected to the third capacitor in parallel,
a first terminal of the fourth capacitor is connected to a first terminal of the third capacitor, and a second terminal of the fourth capacitor is connected to a first terminal of the electromagnetic heating component, the first terminal of the fourth capacitor is further connected to the power supply module,
a second terminal of the electromagnetic heating component is connected to a second terminal of the third capacitor and is grounded through the first resistor,
the detection circuit is connected to the first resistor in parallel, and is configured to detect an electrical signal of the first resistor,
the control module is further configured to obtain the electrical signal of the electromagnetic heating component according to the electrical signal of the first resistor.

In an embodiment, the heating circuit further includes a fifth capacitor, a sixth capacitor, the electromagnetic heating component, and a third switch,

the third switch is connected to the sixth capacitor in parallel and then is connected to the electromagnetic heating component in series,
a first terminal of the fifth capacitor is connected to a terminal of the electromagnetic heating component away from the sixth capacitor, and a second terminal of the fifth capacitor is connected to a terminal of the sixth capacitor away from the electromagnetic heating component and is grounded respectively,
the detection circuit is configured to detect the electrical signal of the electromagnetic heating component.

In an embodiment, the heating circuit further includes a transformer and a second resistor connected to each other in parallel,

the transformer is configured to sense the electrical signal of the electromagnetic heating component,
the detection circuit is configured to detect an electrical signal of the second resistor.

In an embodiment, the detection circuit includes a rectifier module, a follower module, and a filter module sequentially connected in series,
an input terminal of the rectifier module is connected to the electromagnetic heating component, an output terminal of the filter module is connected to the control module.
In an embodiment, the detection circuit further includes a voltage divider module connected between the rectifier module and the follower module.
In the second aspect of the present application, a temperature control method for an aerosol generation device is provided, including:

obtaining an electrical signal of an electromagnetic heating component in the aerosol generation device; and
after a sudden change in the electrical signal of the electromagnetic heating component is detected, controlling operating time of a heating circuit according to a preset corresponding relationship to control a temperature of the electromagnetic heating component, the preset corresponding relationship being between an electrical signal variation and a temperature variation.

In an embodiment, controlling the operating time of the heating circuit according to the preset corresponding relationship to control the temperature of the electromagnetic heating component includes:
controlling turn-on or turn-off of a switch in the aerosol generation device according to the preset corresponding relationship to control the operating time of the heating circuit.
In the third aspect of the present application, a temperature control apparatus for an aerosol generation device is provided, including:

an obtaining module, configured to obtain an electrical signal of an electromagnetic heating component in the aerosol generation device; and
a processing module, configured to control operating time of a heating circuit according to a preset corresponding relationship after a sudden change in the electrical signal of the electromagnetic heating component is detected, to control a temperature of the electromagnetic heating component, the preset corresponding relationship being between an electrical signal variation and a temperature variation.

In an embodiment, the processing module is further configured to control turn-on or turn-off of a switch in the aerosol generation device according to the preset corresponding relationship to control the operating time of the heating circuit.
For the above-mentioned aerosol generation device, the temperature control method and apparatus thereof, the aerosol generation device includes: a power supply module, a control module, a heating circuit, and a detection circuit. The power supply module is configured to provide energy to the heating circuit. The control module is configured to obtain the electrical signal of the electromagnetic heating component in the heating circuit through the detection circuit, and control the operating time of the heating circuit according to the preset corresponding relationship after a sudden change in the electrical signal of the electromagnetic heating component is detected, to control the temperature of the electromagnetic heating component. The preset corresponding relationship is provided between the electrical signal variation and the temperature variation. Through the above method of the present application, the detection circuit detects the electrical signal of the electromagnetic heating component in the aerosol generation device, the characteristic that the electromagnetic heating component has the Curie temperature is employed, so that it can be clearly determined that the electromagnetic heating component reaches the Curie temperature when a sudden change in the detected electrical signal is detected, thereby avoiding influences of various other factors during the use of the aerosol generation device. After the sudden change in the electrical signal of the electromagnetic heating component is detected, the operating time of the heating circuit is controlled according to the corresponding relationship between the electrical signal variation and the temperature variation, in order to control the temperature of the electromagnetic heating component. Accordingly, the temperature can be accurately controlled.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic diagram of a module structure of an aerosol generation device according to an embodiment of the present invention.
FIG. 2 is a schematic diagram of a circuit structure of an aerosol generation device according to embodiment I of the present invention.
FIG. 3 is a schematic curve diagram of electrical signals and envelopes in an electromagnetic heating component according to embodiment I of the present invention.
FIG. 4 is a schematic diagram of a circuit structure of an aerosol generation device according to embodiment II of the present invention.
FIG. 5 is a schematic curve diagram of electrical signals and envelopes in an electromagnetic heating component according to embodiment II of the present invention.
FIG. 6 is a schematic diagram of a circuit structure of an aerosol generation device according to embodiment III of the present invention.
FIG. 7 is a schematic curve diagram of electrical signals and envelopes in an electromagnetic heating component according to embodiment III of the present invention.
FIG. 8 is a schematic diagram of a circuit structure of an aerosol generation device according to embodiment IV of the present invention.
FIG. 9 is a schematic curve diagram of electrical signals and envelopes in an electromagnetic heating component according to embodiment IV of the present invention.
FIG. 10 is a schematic diagram of a temperature variation curve of an electromagnetic heating component according to an embodiment of the present invention.
FIG. 11 is a schematic diagram of a module structure of a detection circuit according to an embodiment of the present invention.
FIG. 12 is a schematic diagram of a circuit structure of a detection circuit according to an embodiment of the present invention.
FIG. 13 is a schematic diagram of a module structure of a temperature control apparatus for an aerosol generation device according to an embodiment of the present invention.

DETAILED DESCRIPTION OF THE EMBODIMENTS

In order to facilitate understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings. Embodiments of the present invention are shown in the accompanying drawings. However, the present invention may be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to make the disclosed content of the present invention more thorough and comprehensive.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs. The terms used in the description of the present application are only for the purpose of describing specific embodiments and are not intended to limit the present application.
It can be understood that the terms "first", "second", etc., used in the present application can be used herein to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish a first element from another element.
Spatial relationship terms such as "below", "under", "lower", "beneath", "above", "upper", etc., may be used herein to describe a relationship between one element or feature and other elements or features shown in the figures. It should be appreciated that the spatial relationship terms further include different orientations of the device in use and operation in addition to the orientations shown in the figures. For example, if the device in the figures is turned over, an element or feature described as "below" or "beneath" or "under" other elements would then be oriented "above" other elements or features. Thus, the exemplary terms "below" and "under" may include both up and down orientations. In addition, the device may have other orientations (e.g., rotated 90 degrees or at other orientations), and the spatial terms used herein may be interpreted accordingly.
It should be noted that when a component is considered to be "connected to" another component, the component may be directly connected to the other component or connected to the other component through an intermediate component. In addition, the "connection" in the following embodiments should be understood as "electrical connection", "communication connection", etc., when there exists transmission of electrical signals or data between the connected objects.
As used herein, the singular form, such as "a", "an" or "the", may also include the plural form, unless the context clearly indicates otherwise. It should also be appreciated that the terms "including/comprising" or "having" and the like specify the presence of stated features, entireties, steps, operations, components, portions or combinations thereof, but do not exclude the possibility of the presence or addition of one or more other features, entireties, steps, operations, components, portions or combinations thereof. Meanwhile, the term "and/or" used in the specification includes any and all combinations of the listed relevant items.
In an embodiment of the present invention, an aerosol generation device is provided. As shown in FIG. 1, the aerosol generation device may include: a power supply module 110, a control module 120, a heating circuit 130, and a detection circuit 140. The power supply module 110 is connected to the control module 120 and the heating circuit 130 respectively. The control module 120 is further connected to the heating circuit 130. The heating circuit 130 is connected to the detection circuit 140.
The power supply module 110 is configured to provide energy to the heating circuit 130. Similarly, the power supply module 110 is also configured to provide energy to the control module 120, so that the heating circuit 130 and the control module 120 operate normally. The heating circuit 130 may include an electromagnetic heating component. The electromagnetic heating component heats an atomization substrate inside the aerosol generation device by using the energy provided by the power supply module 110. The control module 120 may control operating time of the heating circuit 130 within a unit operating cycle, thereby adjusting a power of the heating circuit 130 and controlling a temperature of the electromagnetic heating component.
The control module 120 is configured to obtain an electrical signal of the electromagnetic heating component in the heating circuit 120 through the detection circuit 140, and control the operating time of the heating circuit 120 according to a preset corresponding relationship after a sudden change in the electrical signal of the electromagnetic heating component is detected, to control the temperature of the electromagnetic heating component. The preset corresponding relationship is provided between an electrical signal variation and a temperature variation.
Specifically, the principle of the present application is first briefly introduced. Since the magnetic heating material has the characteristic of Curie temperature, when the heating temperature reaches the Curie temperature of the magnetic heating component, magnetic permeability and an electrical conductivity thereof may suddenly change, thereby causing sudden changes in inductance and a resistance. In the present application, this characteristic is employed to detect the corresponding electrical signal of the magnetic heating material when determining that the magnetic heating material reaches the Curie temperature, thereby avoiding the problem of incorrespondence between the temperature and electrical signal of the magnetic heating material due to the influence of an operating environment or an operating state, etc., of the aerosol generation device. The electrical signal may include a voltage or a current. In the meanwhile, after the magnetic heating material reaches the Curie temperature, there exists a corresponding relationship between the temperature variation and the electrical signal variation of the magnetic heating material. The corresponding relationship is pre-stored in the aerosol generation device. It should be noted that different magnetic heating components correspond to different Curie temperatures.
By using the above-mentioned characteristic in the present application, the control module 120 obtains the electrical signal of the electromagnetic heating component in the heating circuit 120 through the detection circuit 140, and then detects/identifies the obtained electrical signal. When a sudden change in the electrical signal of the electromagnetic heating component is detected, it indicates that the temperature of the electromagnetic heating component reaches the Curie temperature. Subsequently, the operating time of the heating circuit 120 within the unit operating cycle can be controlled according to the pre-stored corresponding relationship. Accordingly, a magnitude of the electrical signal applied to the magnetic heating component within the unit operating cycle is controlled, thereby the control of the temperature of the electromagnetic heating component is implemented.
The above-mentioned aerosol generation device includes: a power supply module, a control module, a heating circuit, and a detection circuit. The power supply module is configured to provide energy to the heating circuit. The control module is configured to obtain the electrical signal of the electromagnetic heating component in the heating circuit through the detection circuit, and control the operating time of the heating circuit according to the preset corresponding relationship after a sudden change in the electrical signal of the electromagnetic heating component is detected, to control the temperature of the electromagnetic heating component. The preset corresponding relationship is provided between the electrical signal variation and the temperature variation. Through the above method of the present application, the detection circuit detects the electrical signal of the electromagnetic heating component in the aerosol generation device, the characteristic that the electromagnetic heating component has the Curie temperature is employed, so that it can be clearly determined that the electromagnetic heating component reaches the Curie temperature when a sudden change in the detected electrical signal is detected, thereby avoiding influences of various other factors during the use of the aerosol generation device. After the sudden change in the electrical signal of the electromagnetic heating component is detected, the operating time of the heating circuit is controlled according to the corresponding relationship between the electrical signal variation and the temperature variation, in order to control the temperature of the electromagnetic heating component. Accordingly, the temperature can be accurately controlled.
As an embodiment, referring to FIG. 2, the heating circuit 130 may include a first capacitor 131, a second capacitor 132, an electromagnetic heating component 133, and a first switch 134.
The first switch 134 is connected to the first capacitor 131 in parallel. A first terminal of the second capacitor 132 is connected to a first terminal of the first capacitor 131, and a second terminal of the second capacitor 132 is connected to a first terminal of the electromagnetic heating component 133. The first terminal of the second capacitor 132 is further connected to the power supply module 110. A second terminal of the electromagnetic heating component 133 is connected to the second terminal of the first capacitor 131 and is grounded.
The detection circuit 140 is connected to the electromagnetic heating component 133 in parallel, and the detection circuit 140 is configured to detect the electrical signal of the electromagnetic heating component 133.
In the embodiment, the first switch 134 is a Metal-Oxide-Semiconductor Field-Effect Transistor (MOSFET), and also may be other types of switches in other specific implementations. The control module 120 is connected to an enable terminal of the MOSFET. The control module 120 can control turn-on or turn-off of the MOSFET, thereby implementing the control of the electromagnetic heating component 133.
Specifically, when the control module 120 controls the MOSFET to be turned on, a current output by the power supply module 110 and an alternating current on the electromagnetic heating component 133 and the second capacitor 132 flow through the first switch 134, and a voltage across the first capacitor 131 is equal to 0. When the control module 120 controls the MOSFET to be turned off, the current output by the power supply module 110 and the alternating current on the electromagnetic heating component 133 and the second capacitor 132 first charge the first capacitor 131. As the alternating current enters a negative half cycle until an instantaneous absolute value of the alternating current value is greater than the value of the current output by the power supply module 110, the first capacitor 131 begins to discharge. After the discharge of the first capacitor 131 is completed, the voltage across the first capacitor 131 is equal to 0, that is, the voltage across the MOSFET is equal to 0. Subsequently, the next cycle is entered, and the MOSFET is turned on.
The heating circuit 130 is of E class. In one cycle, when the MOSFET is turned on, the voltage on the MOSFET is equal to 0, while the current is unequal to 0. When the MOSFET is turned off, the voltage on the MOSFET is unequal to 0, while the current is equal to 0. So that the MOSFET does not consume electric energy. In the operating state, the electromagnetic heating component 133 and the second capacitor 132 are always in a resonant state. An alternating voltage across the electromagnetic heating component 133 is converted, through the detection circuit 140, into a direct current (DC) voltage signal appropriate for being collected by the control module 120. The control module 120 performs the collection through the detection circuit 140 and obtains the DC voltage signal of the electromagnetic heating component 133.
During use, the control module 120 determines whether the electromagnetic heating component 1312 reaches the Curie temperature according to the collected voltage signal. When the electromagnetic heating component 1312 reaches the Curie temperature, equivalent inductance and an equivalent resistance of the electromagnetic heating component 133 may change significantly, and the corresponding voltage across the electromagnetic heating component 133 may change significantly.
Refer to FIG. 3, it is a schematic curve diagram of electrical signals and envelopes acquired during a test of the circuit shown in FIG. 2. In FIG. 3, a horizontal axis represents time and a vertical axis represents voltage (or current in specific implementations). Each of the envelopes is a detected voltage or current waveform, and then a curve is drawn with a maximum point of each of the envelopes, so that a corresponding electrical signal (DC signal) curve graph is formed, and in this case the electrical signal is a voltage signal. FIG. 3 shows that the voltage signal shows a turning point (the moment of the left trough) at the Curie temperature. The control module 120 determines the turning point, which indicates that the electromagnetic heating component 1312 reaches the Curie temperature at the moment. Meanwhile, it is concluded that the voltage value at the moment corresponds to the Curie temperature of the electromagnetic heating component 1312. After the electromagnetic heating component 1312 reaches the Curie temperature, the control module 120 controls the magnitude of the voltage signal applied across the electromagnetic heating component 133 by controlling on-time of the MOSFET (duty cycle), meanwhile the temperature of the electromagnetic heating component 1312 is measured through a temperature measuring instrument, and the corresponding curve of the temperature and the voltage is established. Finally, the control module 120 controls, according to the temperature/voltage curve, the temperature of the electromagnetic heating component 1312 by controlling the magnitude of the voltage signal applied across the electromagnetic heating component 133.
Since the AC signal is stronger than the DC signal, the AC signal has a stronger anti-interference capability. Accordingly, data obtained by detecting the AC signal of the electromagnetic heating component 137 in the embodiment is more accurate than data obtained by detecting the DC signal in the circuit in the existing technology. Meanwhile, the electromagnetic heating component 137 is directly detected, which can avoid influences of other devices or wiring, and the detection result is reliable.
As an embodiment, referring to FIG. 4, the heating circuit 130 may include a third capacitor 135, a fourth capacitor 136, an electromagnetic heating component 137, a second switch 138, and a first resistor 139.
The second switch 138 is connected to the third capacitor 135 in parallel. A first terminal of the fourth capacitor 136 is connected to a first terminal of the third capacitor 135, and a second terminal of the fourth capacitor 136 is connected to a first terminal of the electromagnetic heating component 137. The first terminal of the fourth capacitor 136 is further connected to the power supply module 110. A second terminal of the electromagnetic heating component 137 is connected to a second terminal of the third capacitor 135 and is grounded through the first resistor 139.
The detection circuit 140 is connected to the first resistor 139 in parallel, and is configured to detect an electrical signal of the first resistor 139.
The control module 120 is further configured to obtain an electrical signal of the electromagnetic heating component 137 according to the electrical signal of the first resistor 139.
In the embodiment, the second switch 138 is an MOSFET, and may also be other types of switches in other specific implementations. The control module 120 is connected to an enable terminal of the MOSFET. The control module 120 can control the turn-on or turn-off of the MOSFET, in order to control the electromagnetic heating component 137.
Specifically, when the control module 120 controls the MOSFET to be turned on, the current output by the power supply module 110 and the alternating current on the electromagnetic heating component 137 and the fourth capacitor 136 flow through the second switch 138, and the voltage across the third capacitor 135 is equal to 0. When the control module 120 controls the MOSFET to be turned off, the current output by the power supply module 110 and the alternating current on the electromagnetic heating component 137 and the fourth capacitor 136 first charge the third capacitor 135, and as the alternating current enters the negative half cycle until the instantaneous absolute value of the alternating current value is greater than the value of the current output by the power supply module 110, the third capacitor 135 begins to discharge. After the discharge of the third capacitor 135 is completed, the voltage across the third capacitor 135 is equal to 0, that is, the voltage across the MOSFET is equal to 0. Subsequently, the next cycle is entered, and the MOSFET is turned on.
The heating circuit 130 is of E class. In one cycle, when the MOSFET is turned on, the voltage on the MOSFET is equal to 0, and the current is unequal to 0. When the MOSFET is turned off, the voltage on the MOSFET is unequal to 0, and the current is equal to 0. Accordingly, the MOSFET does not consume electric energy. In the operating state, the electromagnetic heating component 137 and the fourth capacitor 136 are always in the resonant state.
Since the first resistor 139 is connected to the electromagnetic heating component 137 in series in the same loop, the current flowing through the electromagnetic heating component 137 is the same as the current flowing through the first resistor 139. In the embodiment, the AC current on the first resistor 139 is converted into the AC voltage, and is converted, through the detection circuit 140, into the DC voltage signal appropriate for being collected by the control module 120. The control module 120 performs the collection through the detection circuit 140, and then the control module 120 performs the conversion and obtains the DC voltage signal of the electromagnetic heating component 137.
During the use, the control module 120 determines whether the electromagnetic heating component 1312 reaches the Curie temperature according to the collected voltage signal. When the electromagnetic heating component 1312 reaches the Curie temperature, the equivalent inductance and the equivalent resistance of the electromagnetic heating component 137 may change significantly, and the corresponding voltage across the electromagnetic heating component 137 may change significantly.
Referring to FIG. 5, it is a schematic curve diagram of electrical signals and envelopes acquired during a test of the circuit shown in FIG. 4. In FIG. 5, the horizontal axis represents time and the vertical axis represents voltage (or current in the specific implementations), each envelope is a detected voltage waveform, and then a curve is drawn with a maximum point of each of the envelopes, so that a corresponding electrical signal (DC signal) curve is formed. In this case, the electrical signal is a voltage signal. FIG. 5 shows that the voltage signal shows a turning point at the Curie temperature (i.e., the moment of the left trough, which can be determined to be lower according to the changing trend, for example, if the detected electrical signal first drops and then rises, it is considered that a mutation point/turning point occurs at the moment). The control module 120 determines the turning point, which indicates that the electromagnetic heating component 1312 reaches the Curie temperature at the moment. Meanwhile, it is concluded that the voltage value at the moment corresponds to the Curie temperature of the electromagnetic heating component 1312. After the electromagnetic heating component 1312 reaches the Curie temperature, the control module 120 controls the magnitude of the voltage signal applied across the electromagnetic heating component 137 by controlling the on-time of the MOSFET (duty cycle), meanwhile the temperature of the electromagnetic heating component 1312 is measured through a temperature measuring instrument, and the corresponding curve of the temperature and the voltage is established. Finally, the control module 120 controls, according to the temperature/voltage curve, the temperature of the electromagnetic heating component 1312 by controlling the magnitude of the voltage signal applied across the electromagnetic heating component 137.
According to the above description, the difference between this embodiment and the previous embodiment is that in this embodiment the voltage of the electromagnetic heating component 137 is indirectly obtained by detecting the voltage of the resistor connected to the electromagnetic heating component 137 in series. Other descriptions are substantially the same.
As an embodiment, referring to FIG. 6, the heating circuit 130 may include a fifth capacitor 1310, a sixth capacitor 1311, an electromagnetic heating component 1312, and a third switch 1313.
The third switch 1313 is connected to the sixth capacitor 1311 in parallel and then is connected to the electromagnetic heating component 1312 in series. A first terminal of the fifth capacitor 1310 is connected to a terminal of the electromagnetic heating component 1312 away from the sixth capacitor 1311, and a second terminal of the fifth capacitor 1310 is connected to a terminal of the sixth capacitor 1311 away from the electromagnetic heating component 1312 and is grounded.
The detection circuit 140 is configured to detect the electrical signal of the electromagnetic heating component 1312.
The third switch 1313 may be a MOSFET. When the control module 120 controls the third switch 1313 to be turned on, the DC current of the power supply module 110 and the AC current on the electromagnetic heating component 1312 and the fifth capacitor 1310 flow through the third switch 1313, and the voltage across the sixth capacitor 1311 is equal to 0. When the MCU controls the third switch 1313 to be turned off, the DC current of the power supply module 110 and the AC current on the electromagnetic heating component 1312 and the fifth capacitor 1310 first charge the sixth capacitor 1311, and as the AC current enters the negative half cycle until the instantaneous value of the value of the AC current is greater than the value of the DC current of the power supply module 110, the sixth capacitor 1311 begins to discharge. After the discharge of the sixth capacitor 1311 is completed, the voltage across the sixth capacitor 1311 is equal to 0, that is, the voltage across the third switch 1313 is equal to 0. Subsequently, the next cycle is entered, and the third switch 1313 is turned on.
The heating circuit 130 is of inverse E class. In one cycle, when the third switch 1313 is turned on, the voltage on the third switch 1313 is equal to 0, and the current is unequal to 0. When the third switch 1313 is turned off, the voltage on the third switch 1313 is unequal to 0, and the current is equal to 0. Accordingly, the third switch 1313 does not consume electric energy. In the operating state, the electromagnetic heating component 1312 and the fifth capacitor 1310 are always in the resonant state. After the AC voltage across the electromagnetic heating component 1312 passes through the detection circuit 140, the control module 120 can detect and obtain the AC voltage across the electromagnetic heating component 1312 (or the current is detected in specific implementations).
Subsequently, the control module 120 determines whether the electromagnetic heating component 1312 reaches the Curie temperature according to the collected voltage signal. When the electromagnetic heating component 1312 reaches the Curie temperature, the equivalent inductance and the equivalent resistance on a coil of the electromagnetic heating component 1312 may change significantly, and the voltage across the electromagnetic heating component 1312 may change significantly (at the moment of the left trough).
As shown in FIG. 7, it shows that the voltage signal has a turning point (mutation point) at the Curie temperature. The control module 120 determines the turning point, which indicates that the electromagnetic heating component 1312 reaches the Curie temperature at the moment. Meanwhile, it is concluded that the voltage value at the moment corresponds to the Curie temperature of the electromagnetic heating component 1312. After the electromagnetic heating component 1312 reaches the Curie temperature, the control module 120 controls the magnitude of the voltage signal applied across the electromagnetic heating component 1312 by controlling the on-time of the third switch 1313 (duty cycle), meanwhile the temperature of the electromagnetic heating component 1312 is measured through a temperature measuring instrument, and the corresponding curve of the temperature and the voltage is established. Finally, the control module 120 controls, according to the temperature/voltage curve, the temperature of the electromagnetic heating component 1312 by controlling the magnitude of the voltage signal applied across the electromagnetic heating component 1312.
As an embodiment, referring to FIG. 8, based on the circuit shown in FIG. 8, the heating circuit 130 may further include a transformer 1314 and a second resistor 1315 connected to each other in parallel. The transformer 1314 is configured to sense the electrical signal of the electromagnetic heating component 1312. The detection circuit 140 is configured to detect the electrical signal of the second resistor 1315.
Compared to the embodiment shown in FIG. 6, the embodiment shown in FIG. 8 further includes a transformer 1314 and a second resistor 1315. The AC current signal on the electromagnetic heating component 1312 is converted into the AC voltage signal through the transformer 1314 and the second resistor 1315, and then the control module 120 detects the DC voltage signal of the second resistor 1315 through the detection circuit 140 (a detection graph is shown in FIG. 9), and determines whether there is a turning point (a mutation point, that is, a position corresponding to the moment of the left trough) according to the DC voltage signal. When there is a turning point, it indicates that the electromagnetic heating component 1312 reaches the Curie temperature at the moment. Meanwhile, it is concluded that the voltage value at the moment corresponds to the Curie temperature of the electromagnetic heating component 1312. After the electromagnetic heating component 1312 reaches the Curie temperature, the control module 120 controls the magnitude of the voltage signal applied across the electromagnetic heating component 1312 by controlling the on-time of the third switch 1313 (duty cycle), meanwhile the temperature of the electromagnetic heating component 1312 is measured through a temperature measuring instrument, and the corresponding curve of the temperature and the voltage is established. Finally, the control module 120 controls, according to the temperature/voltage curve, the temperature of the electromagnetic heating component 1312 by controlling the magnitude of the voltage signal applied across the electromagnetic heating component 1312.
Referring to FIG. 10, it is a schematic diagram of a temperature variation curve over time according to an embodiment. In conjunction with the above-mentioned FIGS. 3, 5, 7, and 9, according to the above comparison, it can be seen that after the obtained electrical signal is detected to have a turning point (mutation point), the trend of the electrical signal is substantially synchronized with the trend of the temperature, and there exists a corresponding relationship between the variation of the electrical signal and the variation of the temperature. Accordingly, in the present application, the temperature of the magnetic heating component can be adjusted according to the provided variation of the electrical signal after the magnetic heating component is determined to reach the Curie temperature thereof. With the aerosol generation device in the technical solution of the present application, the technical effect of adjusting the temperature of the magnetic heating component without mounting a temperature sensor can be achieved.
As an embodiment, based on the above embodiment, referring to FIG. 11, the detection circuit 140 may include a rectifier module 141, a voltage divider module 144, a follower module 142, and a filter module 143 sequentially connected in series. An input terminal of the rectifier module 141 is connected to the electromagnetic heating component, the first resistor or the second resistor. An output terminal of the filter module 143 is connected to the control module 120.
As another embodiment, the detection circuit 140 may further include a rectifier module 141, a follower module 142, and a filter module 143 sequentially connected in series. An input terminal of the rectifier module 141 is connected to the electromagnetic heating component, the first resistor or the second resistor. An output terminal of the filter module 143 is connected to the control module 120. In a specific implementation, other detection circuits may be used, which is not limited here.
Specifically, the rectifier module 141 converts an AC signal into a DC signal. The follower module 142 is configured to isolate a signal input to the follower module 142 from a signal output from the follower module 142, in order to avoid the influence of the input signal. The filter module 143 is configured to filter out a noise wave in the signal output by the follower module 142.
Based on the same inventive concept, in an embodiment of the present invention, a temperature control method for the above-mentioned aerosol generation device is provided. The solution to the problem provided by the method is similar to the solution described in the above-mentioned aerosol generation device. Accordingly, as for the specific limitations in one or more embodiments of the temperature control method for an aerosol generation device provided below, reference can be made to the above limitations on the aerosol generation device, which will not be repeated here.
In an embodiment, as shown in FIG. 12, based on the above embodiment, the temperature control method may include the following steps.
Step 1210: an electrical signal of an electromagnetic heating component in the aerosol generation device is obtained.
Step 1220: after a sudden change in the electrical signal of the electromagnetic heating component is detected, operating time of the heating circuit is controlled according to a preset corresponding relationship to control a temperature of the electromagnetic heating component. The preset corresponding relationship is provided between an electrical signal variation and a temperature variation.
Specifically, the present application can be applied to the control module described in any of the above embodiments. The control module can directly or indirectly obtain the electrical signal of the electromagnetic heating component in the aerosol generation device, and then detect/identify the obtained electrical signal. When a sudden change in the electrical signal of the electromagnetic heating component is detected, it indicates that the temperature of the electromagnetic heating component reaches the Curie temperature. Subsequently, the operating time of the heating circuit in a unit cycle can be controlled according to the pre-stored corresponding relationship. Accordingly, the control of the magnitude of the electric signal applied to the magnetic heating component in the unit cycle is implemented, thereby implementing the control of the temperature of the electromagnetic heating component.
In some embodiments, the step of controlling the operating time of the heating circuit according to the preset corresponding relationship to control the temperature of the electromagnetic heating component may include:
turn-on or turn-off of the switch in the aerosol generation device is controlled according to the preset corresponding relationship to control the operating time of the heating circuit.
In the embodiment, the control module controls the turn-on or turn-off of the switch in the aerosol generation device according to the preset corresponding relationship, in order to control the operating time of the heating circuit. In specific implementations, the control may also be performed in other ways, such as controlling the turn-on or turn-off of the power supply module to implement the same function.
In the above-mentioned temperature control method for the aerosol generation device, the electrical signal of the electromagnetic heating component in the aerosol generation device is detected through the detection circuit, and the characteristic that the electromagnetic heating component has the Curie temperature is employed, so that it can be clearly determined that the electromagnetic heating component reaches the Curie temperature when the detected electrical signal has a sudden change, thereby avoiding the influences of various other factors during the use of the aerosol generation device. After a sudden change in the electrical signal of the electromagnetic heating component is detected, the operating time of the heating circuit is controlled according to the corresponding relationship between the electrical signal variation and the temperature variation, the control of the temperature of the electromagnetic heating component is implemented, thereby accurately controlling the temperature.
It should be appreciated that, although the steps in the flow charts involved in the embodiments described above are displayed sequentially as indicated by the arrows, these steps are not definitely executed sequentially in the order indicated by the arrows. Unless otherwise specified herein, there is no strict order limitation for the execution of these steps, and these steps may be executed in other orders. Moreover, at least part of the steps in the flow charts involved in the embodiments described above may include multiple steps or multiple stages. These steps or stages are not definitely executed at the same moment, but can be executed at different moments. These steps or stages are not definitely executed sequentially, but can be executed in turns or alternately with other steps or at least part of the steps or stages in other steps.
Based on the same inventive concept, in an embodiment of the present invention, a temperature control apparatus for an aerosol generation device for implementing the above-mentioned temperature control method for the aerosol generation device is provided. The solution to the problem provided by the apparatus is similar to the solution described in the temperature control method for the aerosol generation device described above. Accordingly, as for the specific limitations in one or more embodiments of the temperature control apparatus for the aerosol generation device provided below, reference can be made to the above limitations on the temperature control method for the aerosol generation device, which will not be repeated here.
In an embodiment of the present invention, as shown in FIG. 13, a temperature control apparatus for an aerosol generation device is further provided, including:

an obtaining module 1310, configured to obtain an electrical signal of the electromagnetic heating component in the aerosol generation device;
a processing module 1320, configured to control operating time of the heating circuit according to a preset corresponding relationship after a sudden change in the electrical signal of the electromagnetic heating component is detected, to control a temperature of the electromagnetic heating component. The preset corresponding relationship is provided between an electrical signal variation and a temperature variation.

In an embodiment, the processing module 1320 is further configured to control turn-on or turn-off of the switch in the aerosol generation device according to the preset corresponding relationship to control the operating time of the heating circuit.
The modules in the temperature control apparatus for the aerosol generation device may be implemented in whole or in part by software, hardware or a combination thereof. The above modules may be embedded in or independent of a processor in a computer device in the form of hardware, or may be stored in a memory in a computer device in the form of software, so that the processor can invoke and execute operations corresponding to the above modules.
In an embodiment, a computer-readable storage medium is provided, on which a computer program is stored. The computer program, when executed by a processor, may cause the processor to implement the steps in any of the embodiments of the above-mentioned temperature control method for the aerosol generation device.
A person of ordinary skill in the art can understand that all or part of the processes in the above-mentioned embodiments of the method can be implemented by instructing related hardware through a computer program. The computer program may be stored in a non-transitory computer-readable storage medium. When the computer program is executed, the processes of the embodiments of the above-mentioned method are included. Any reference to a memory, a database, or other medium used in the embodiments provided in the present application may include at least one of a non-transitory memory and a transitory memory. The non-transitory memory may include a read-only memory (ROM), a magnetic tape, floppy disk, a flash memory, an optical storage, a high-density embedded non-transitory memory, a resistive random access memory (ReRAM), a magnetoresistive random access memory (MRAM), a ferroelectric random access memory (FRAM), a phase change memory (PCM), a graphene memory, etc. The transitory memory may include a random access memory (RAM) or an external cache memory, etc. By way of illustration and not limitation, the RAM may be in various forms, such as a static random access memory (SRAM) or a dynamic random access memory (DRAM). The database involved in each embodiment of the present invention may include at least one of a relational database and a non-relational database. The non-relational database may include, but is not limited to, a distributed database based on blockchain. The processor involved in each embodiment of the present invention may be a general-purpose processor, a central processing unit, a graphics processor, a digital signal processor, a programmable logic unit, a data processing logic unit based on quantum computing, etc., but is not limited thereto.
The technical features in the above embodiments may be combined in any way. In order to make the description concise, all possible combinations of the technical features in the above embodiments are not described. However, as long as there is no contradiction in the combinations of these technical features, these combinations should be considered to be within the scope of the present application.
The above-described embodiments only express several implementation modes of the present invention, and the descriptions are relatively specific and detailed, but should not be construed as limiting the scope of the present invention. It should be noted that, those of ordinary skill in the art can make several transformation and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

An aerosol generation device, comprising a power supply module, a control module, a heating circuit, and a detection circuit, wherein
the power supply module is connected to provide energy to the heating circuit; and

the control module is configured to obtain an electrical signal of an electromagnetic heating component in the heating circuit through the detection circuit, and control operating time of the heating circuit according to a preset corresponding relationship after a sudden change in the electrical signal of the electromagnetic heating component is detected, to control a temperature of the electromagnetic heating component, wherein the preset corresponding relationship is provided between an electrical signal variation and a temperature variation.
The aerosol generation device according to claim 1, wherein the heating circuit comprises a first capacitor, a second capacitor, the electromagnetic heating component, and a first switch, wherein
the first switch is connected to the first capacitor in parallel,

a first terminal of the second capacitor is connected to a first terminal of the first capacitor, and a second terminal of the second capacitor is connected to a first terminal of the electromagnetic heating component, the first terminal of the second capacitor is further connected to the power supply module,

a second terminal of the electromagnetic heating component is connected to the second terminal of the first capacitor and is grounded respectively,

the detection circuit is connected to the electromagnetic heating component in parallel, and is configured to detect the electrical signal of the electromagnetic heating component.
The aerosol generation device according to claim 1, wherein the heating circuit further comprises a third capacitor, a fourth capacitor, the electromagnetic heating component, a second switch, and a first resistor, wherein
the second switch is connected to the third capacitor in parallel,

a first terminal of the fourth capacitor is connected to a first terminal of the third capacitor, and a second terminal of the fourth capacitor is connected to a first terminal of the electromagnetic heating component, the first terminal of the fourth capacitor is further connected to the power supply module,

a second terminal of the electromagnetic heating component is connected to a second terminal of the third capacitor and is grounded through the first resistor,

the detection circuit is connected to the first resistor in parallel, and is configured to detect an electrical signal of the first resistor,

the control module is further configured to obtain the electrical signal of the electromagnetic heating component according to the electrical signal of the first resistor.
The aerosol generation device according to claim 1, wherein the heating circuit further comprises a fifth capacitor, a sixth capacitor, the electromagnetic heating component, and a third switch, wherein
the third switch is connected to the sixth capacitor in parallel and then is connected to the electromagnetic heating component in series,

a first terminal of the fifth capacitor is connected to a terminal of the electromagnetic heating component away from the sixth capacitor, and a second terminal of the fifth capacitor is connected to a terminal of the sixth capacitor away from the electromagnetic heating component and is grounded respectively,

the detection circuit is configured to detect the electrical signal of the electromagnetic heating component.
The aerosol generation device according to claim 1, wherein the heating circuit further comprises a transformer and a second resistor connected to each other in parallel, wherein
the transformer is configured to sense the electrical signal of the electromagnetic heating component,

the detection circuit is configured to detect an electrical signal of the second resistor.
The aerosol generation device according to claim 1, wherein the detection circuit comprises a rectifier module, a follower module, and a filter module sequentially connected in series, wherein
an input terminal of the rectifier module is connected to the electromagnetic heating component, an output terminal of the filter module is connected to the control module.
The aerosol generation device according to claim 6, wherein the detection circuit further comprises a voltage divider module connected between the rectifier module and the follower module.
A temperature control method for an aerosol generation device, comprising:
obtaining an electrical signal of an electromagnetic heating component in the aerosol generation device; and

after a sudden change in the electrical signal of the electromagnetic heating component is detected, controlling operating time of a heating circuit according to a preset corresponding relationship to control a temperature of the electromagnetic heating component, wherein the preset corresponding relationship is provided between an electrical signal variation and a temperature variation.
The method according to claim 8, wherein controlling the operating time of the heating circuit according to the preset corresponding relationship to control the temperature of the electromagnetic heating component comprises:
controlling turn-on or turn-off of a switch in the aerosol generation device according to the preset corresponding relationship to control the operating time of the heating circuit.
A temperature control apparatus for an aerosol generation device, comprising:
an obtaining module, configured to obtain an electrical signal of an electromagnetic heating component in the aerosol generation device; and

a processing module, configured to control operating time of a heating circuit according to a preset corresponding relationship after a sudden change in the electrical signal of the electromagnetic heating component is detected, to control a temperature of the electromagnetic heating component, wherein the preset corresponding relationship is provided between an electrical signal variation and a temperature variation.
The temperature control apparatus according to claim 10, wherein the processing module is further configured to control turn-on or turn-off of a switch in the aerosol generation device according to the preset corresponding relationship to control the operating time of the heating circuit.