Aerosol-generating device

Abstract

The utility model discloses an aerosol generating device, which comprises a temperature detection circuit used for detecting the temperature of an object to be detected and outputting a corresponding voltage signal; a reference voltage circuit configured to output a corresponding reference voltage based on the reference voltage; the control unit is provided with an input and output pin electrically connected with the reference voltage circuit; the control unit is configured to change the working state of the input / output pin so as to change the reference voltage output by the reference voltage circuit; wherein the reference voltage output by the reference voltage circuit is the protection threshold value of the voltage signal output by the temperature detection circuit. By changing the working states of the input and output pins, the reference voltage output by the reference voltage circuit is changed, the temperature threshold value needing to be controlled is adjusted, the requirements of different customers can be met, and the competitiveness of products is improved.

Description

Technical Field

[0001] The present application relates to the technical field of aerosol generation, and in particular to an aerosol generating device. Background Art

[0002] In the related art, there is a type of aerosol-generating device that produces aerosol for the user to inhale by heating rather than burning a solid aerosol-forming substrate, such as a cigarette. Another type of aerosol-generating device produces aerosol for the user to inhale by heating a liquid aerosol-forming substrate, such as tobacco oil.

[0003] In such devices, a temperature sensor typically acquires the real-time temperature of the heating element, thereby enabling temperature control of the heating element. For example, when the real-time temperature of the heating element exceeds a preset temperature protection threshold, power to the heating element is reduced or stopped. However, in existing aerosol generating devices, the temperature protection threshold is typically not adjustable, which results in the device being unable to meet the needs of different customers. Utility Model Content

[0004] The present application provides an aerosol generating device that can flexibly adjust the temperature protection threshold to meet the needs of different customers and enhance the competitiveness of the product.

[0005] The present application provides an aerosol generating device, comprising:

[0006] A temperature detection circuit is used to detect the temperature of the object to be measured and output a corresponding voltage signal;

[0007] a reference voltage circuit configured to output a corresponding reference voltage based on a reference voltage;

[0008] a control unit having input and output pins electrically connected to the reference voltage circuit; the control unit being configured to change the working state of the input and output pins, thereby changing the reference voltage output by the reference voltage circuit;

[0009] The reference voltage output by the reference voltage circuit is a protection threshold of the voltage signal output by the temperature detection circuit.

[0010] In one example, a comparison unit is further included;

[0011] The comparison unit has a first input terminal, a second input terminal and an output terminal; the first input terminal is electrically connected to the temperature detection circuit to obtain the voltage signal output by the temperature detection circuit; the second input terminal is electrically connected to the reference voltage circuit to obtain the reference voltage output by the reference voltage circuit; the output terminal is configured to output a comparison signal based on the comparison between the reference voltage output by the reference voltage circuit and the voltage signal output by the temperature detection circuit.

[0012] In one example, the reference voltage circuit includes a voltage divider circuit for dividing the reference voltage, and an output end of the voltage divider circuit is electrically connected to the second input end.

[0013] In one example, the input / output pin is electrically connected to the second input terminal through a first resistor.

[0014] In one example, the voltage divider circuit includes a voltage divider resistor and a filter capacitor connected in parallel with the voltage divider resistor.

[0015] In one example, the comparison unit includes a comparator, the first input terminal is a non-inverting input terminal of the comparator, and the second input terminal is an inverting input terminal of the comparator.

[0016] In one example, the output terminal of the comparator is electrically connected to the positive power supply terminal of the comparator through a second resistor.

[0017] In one example, a switch circuit electrically connected to the output terminal is further included, and the comparison signal is used to control the on or off of the switch circuit.

[0018] In one example, the switch circuit includes a third resistor and a transistor;

[0019] The base of the transistor is electrically connected to the output end through the third resistor, the emitter of the transistor is grounded, and the collector of the transistor outputs a conduction signal or a disconnection signal.

[0020] In one example, the working states of the input and output pins include input high impedance state, output high level, and output low level.

[0021] In one example, a heating element is further included for heating the aerosol-forming substrate to generate an aerosol;

[0022] The temperature detection circuit is used to detect the temperature of the heating element and output a corresponding voltage signal.

[0023] The aerosol generating device provided above adjusts the temperature threshold to be controlled by changing the working state of the input and output pins, thereby changing the reference voltage output by the reference voltage circuit, thereby meeting the needs of different customers and improving the competitiveness of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The implementation of the objectives, functional features, and advantages of this application will be further described in conjunction with the embodiments and with reference to the accompanying drawings. One or more embodiments are exemplarily illustrated by the figures in the corresponding drawings, and these exemplifications do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and unless otherwise stated, the figures in the drawings are not intended to be proportional.

[0025] Figure 1 Schematic diagram of an aerosol generating device provided in an embodiment of the present application;

[0026] Figure 2 Schematic diagram of another aerosol generating device provided in an embodiment of the present application;

[0027] Figure 3 This is a specific circuit diagram of the aerosol generating device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0028] It should be understood that the specific embodiments described herein are only used to explain the present application and are not intended to limit the present application. In order to facilitate understanding of the present application, the present application will be described in more detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that when an element is described as "fixed to" another element, it can be directly on the other element, or there can be one or more centered elements therebetween. When an element is described as "connected to" another element, it can be directly connected to the other element, or there can be one or more centered elements therebetween. The terms "upper", "lower", "left", "right", "inside", "outside" and similar expressions used in this specification are for illustrative purposes only.

[0029] Unless otherwise defined, all technical and scientific terms used in this specification have the same meanings as those commonly understood by those skilled in the art to which this application belongs. The terms used in this specification and in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" as used in this specification includes any and all combinations of one or more of the relevant listed items.

[0030] Figure 1 This is a schematic diagram of an aerosol generating device provided in an embodiment of the present application.

[0031] like Figure 1 As shown, the aerosol generating device includes a mouthpiece 11, a liquid storage unit 12, a liquid transfer unit 13, a heating element 14, a circuit 15, a battery cell 16, and a charging interface 17. Figure 1In the example, the above components are integrally formed, and the aerosol generating device is a typical one-piece device. In another example, the aerosol generating device includes an atomizer, which is often referred to as a cartridge, and a power supply assembly detachably connected to the atomizer. The atomizer is often referred to as a cigarette cartridge, and the power supply assembly is often referred to as a cigarette rod. The circuit 15, battery cell 16, and charging port 17 are located in the power supply assembly. The mouthpiece 11, liquid storage unit 12, liquid transfer unit 13, and heating element 14 are located in the atomizer.

[0032] The mouthpiece 11 is used for the user to inhale the aerosol generated by heating.

[0033] Liquid storage unit 12 is used to store the liquid aerosol that can generate aerosol and forms matrix.Liquid aerosol forms matrix and can be the liquid that comprises the tobacco material that contains volatile tobacco flavor component, can also be the liquid that comprises non-tobacco material.For example, liquid aerosol forms matrix and can comprise water, solvent, ethanol, plant extract, spices, flavoring agent or vitamin mixture.Spice can comprise menthol, peppermint, spearmint oil, various fruity fragrance components etc., but is not limited to this.Flavoring agent can comprise the composition that can provide multiple fragrance or local flavor to the user.Vitamin mixture can be for being mixed with at least a material among vitamin A, vitamin B, vitamin C and the vitamin E, but is not limited to this.In addition, liquid aerosol forms matrix and can comprise the aerosol forming agent as glycerol and propylene glycol.

[0034] The liquid transfer unit 13 is capable of transferring the liquid aerosol-forming substrate stored in the liquid storage unit 12 to the heating element 14. For example, the liquid transfer unit 13 may be made of, but is not limited to, a porous material such as cotton fiber, ceramic fiber, glass fiber, or porous ceramic or porous glass. The liquid transfer unit 13 may be configured in a tubular, plate-like, or other regular or irregular shape.

[0035] The heating element 14 is a component for heating the liquid aerosol-forming substrate delivered via the liquid delivery unit 13. For example, the heating element 14 may be a metal wire, a metal plate, a ceramic heater, etc., but is not limited thereto. Alternatively, the heating element 14 may be formed of a conductive heating wire, such as a nickel-chromium wire, and may be arranged to be wound around the liquid delivery unit 13. The heating element 14 is heated by a supply of electric current and transfers heat to the liquid aerosol-forming substrate in contact with the heating element 14, thereby heating the liquid aerosol-forming substrate and generating an aerosol.

[0036] The circuit 15 can control the overall operation of the aerosol-generating device. Specifically, the circuit 15 controls not only the operation of the battery cell 16 and the heating element 14, but also the operation of other components in the aerosol-generating device. Furthermore, the circuit 15 can determine whether the aerosol-generating device is operational by checking the status of its components.

[0037] The circuit 15 includes at least one control unit. The control unit may include, but is not limited to, a combination of a microcontroller and a memory for storing programs executable in the microcontroller. The memory may be integrated in the microcontroller or independent of the microcontroller.

[0038] The battery cell 16 provides power for operating the aerosol generating device. For example, the battery cell 16 can provide power to heat the heating element 14 and can provide power required to operate the circuit 15. In addition, the battery cell 16 can provide power required to operate sensors, motors, etc. provided in the aerosol generating device.

[0039] The battery cell 16 may be, but is not limited to, a lithium iron phosphate (LiFePO4) battery cell. For example, the battery cell 16 may be a lithium cobalt oxide (LiCoO2) battery cell or a lithium titanate battery cell. The battery cell 16 may be a rechargeable battery cell.

[0040] Charging interface 17 includes a voltage output terminal. The voltage output terminal is configured to output a charging voltage. Specifically, when charging interface 17 is electrically connected to an external power source, such as when an external power adapter is plugged into charging interface 17, the voltage output terminal of charging interface 17 outputs a 5V charging voltage.

[0041] It should be noted that Figure 1 Only the components relevant to this embodiment are shown. A person skilled in the art will appreciate that the aerosol generating device may further include components other than Figure 1 Other common components other than those shown.

[0042] For example, the aerosol generating device also includes a puff detector (not shown) for detecting the user's puffing action and generating a corresponding electrical signal, such as detecting whether the aerosol generating device is puffed, the puffing duration, the number of puffs, etc., so that the circuit 15, such as the control unit, controls the operation of the battery cell 16, the heating element 14, etc. according to the electrical signal, such as controlling the battery cell 16 to provide power to the heating element 14, so that the heating element 14 heats the atomized liquid aerosol to form a matrix. The puff detector can adopt common pressure sensors, differential pressure sensors, airflow sensors, etc. When the aerosol generating device is puffed, the airflow enters through the charging port 17, flows through the battery cell 16, the circuit 15, the heating element 14, etc., and then flows out through the mouthpiece 11. The dotted arrow in the figure roughly shows the airflow path.

[0043] Figure 2 This is a schematic diagram of an aerosol generating device provided in an embodiment of the present application.

[0044] like Figure 2 As shown, the aerosol generating device comprises:

[0045] a chamber A in which an aerosol-generating article B is removably received;

[0046] The aerosol-generating product B preferably adopts a solid aerosol-forming matrix, which may include one or more of powder, particles, fragments, strips or flakes of one or more of vanilla leaves, tobacco leaves, homogenized tobacco, and expanded tobacco; alternatively, the solid aerosol-forming matrix may contain additional tobacco or non-tobacco volatile flavor compounds to be released when the matrix is ​​heated.

[0047] The heating element 14 can be inserted into the aerosol-generating article B to heat the aerosol-generating article B when the aerosol-generating article B is received in the chamber A, thereby generating an aerosol. This method is generally referred to as central heating or internal heating.

[0048] It should be noted that the heating method of the heating element 14 includes but is not limited to resistance heating, electromagnetic heating, infrared heating, and air heating. The shape of the heating element 14 includes but is not limited to needle-shaped, pin-shaped, or thin sheet-shaped.

[0049] It should also be noted that Figure 2 Different from the examples, in other examples, the heating element 14 is configured to heat around at least a portion of the aerosol-generating article B, which is commonly known as circumferential heating or peripheral heating, etc., which is also feasible.

[0050] The battery cell 16 is used for supplying power; the battery cell 16 may be a rechargeable battery cell.

[0051] The circuit 15 is used to control the aerosol generating device; for example, it controls the battery cell 16 to provide power to the heating element 14 .

[0052] The circuit 15 includes a control unit. The control unit is a hardware component that controls the overall operation of the aerosol generating device. The control unit can be implemented as an array of multiple logic gates, or as a combination of a microcontroller and a memory, with the memory storing a program executable by the microcontroller. Those skilled in the art will appreciate that the control unit can be implemented in other forms of hardware.

[0053] Charging interface 17 includes a voltage output terminal. The voltage output terminal is configured to output a charging voltage. Specifically, when charging interface 17 is electrically connected to an external power source, such as when an external power adapter is plugged into charging interface 17, the voltage output terminal of charging interface 17 outputs a 5V charging voltage.

[0054] Figure 3 This is a specific circuit diagram of the aerosol generating device provided in the embodiment of the present application.

[0055] like Figure 3As shown, VCC1 is the first power supply voltage, VCC2 is the second power supply voltage, and VCC1 or VCC2 can be converted based on the voltage of battery cell 16. For example, VCC1 is a 5V power supply voltage, and VCC2 is a 24V power supply voltage. ADC_TEP is the output pin of the temperature detection circuit, and MCU_PIN is the input and output pin of the control unit.

[0056] like Figure 3 As shown, the aerosol generating device further comprises:

[0057] The temperature detection circuit is used to detect the temperature of the object to be measured and output a corresponding voltage signal.

[0058] The object to be measured may be a heating element 14, and the temperature detection circuit is used to detect the temperature of the heating element 14 and output a corresponding voltage signal. It is understood that the object to be measured is not limited to the heating element 14, and may also be, for example, an electrode M, a battery cell 16, a housing of an aerosol generating device, etc.

[0059] The reference voltage circuit is configured to output a corresponding reference voltage based on the reference voltage; wherein the reference voltage output by the reference voltage circuit is a protection threshold of the voltage signal output by the temperature detection circuit.

[0060] A control unit having input and output pins electrically connected to the reference voltage circuit; the control unit is configured to change the operating state of the input and output pins, thereby changing the reference voltage output by the reference voltage circuit; in one example, the operating states of the input and output pin MCU_PIN include input high impedance, output high level, and output low level. In a specific implementation, the high level can be 3.3V.

[0061] A comparison unit having a first input terminal, a second input terminal and an output terminal; the first input terminal is electrically connected to the temperature detection circuit to obtain the voltage signal output by the temperature detection circuit; the second input terminal is electrically connected to the reference voltage circuit to obtain the reference voltage output by the reference voltage circuit; the output terminal is configured to output a comparison signal based on a comparison between the reference voltage output by the reference voltage circuit and the voltage signal output by the temperature detection circuit.

[0062] In one example, the reference voltage circuit includes a voltage divider circuit for dividing the reference voltage, wherein an output terminal of the voltage divider circuit is electrically connected to the second input terminal of the comparison unit. The voltage divider circuit includes a voltage divider resistor and a filter capacitor connected in parallel with the voltage divider resistor. The input / output pin is electrically connected to the second input terminal of the comparison unit via a first resistor.

[0063] In the example shown, the reference voltage is the first power supply voltage VCC1. The voltage divider circuit is composed of voltage divider resistors R3 and R6 connected in series. The connection point between voltage divider resistors R3 and R6 is electrically connected to the second input terminal of the comparison unit. Filter capacitor C2 is connected in parallel with voltage divider resistor R6. The input / output pin MCU_PIN is connected to the connection point between voltage divider resistors R3 and R6 via a first resistor R4.

[0064] In one example, the comparison unit includes a comparator, the first input terminal is a non-inverting input terminal of the comparator, the second input terminal is an inverting input terminal of the comparator, and the output terminal of the comparator is electrically connected to a positive power supply terminal of the comparator via a second resistor.

[0065] In the example shown in the figure, the non-inverting input terminal of the comparator U1A is electrically connected to the temperature detection circuit, the inverting input terminal of the comparator U1A is electrically connected to the connection point between the voltage-dividing resistor R3 and the voltage-dividing resistor R6, the positive power supply terminal of the comparator U1A is electrically connected to the first power supply voltage VCC1, and a filter capacitor C1 is also electrically connected between the positive power supply terminal of the comparator U1A and the first power supply voltage VCC1. The negative power supply terminal of the comparator U1A is grounded, and the output terminal of the comparator U1A is electrically connected to the positive power supply terminal of the comparator U1A through the second resistor R1.

[0066] When the working state of the input / output pin MCU_PIN is an input high-impedance state, the reference voltage output by the reference voltage circuit is VCC1*R6 / (R3+R6).

[0067] When the working state of the input / output pin MCU_PIN is to output a high level (assuming it is 3.3V), the reference voltage output by the reference voltage circuit is (VCC1*R4*R6+3.3R3*R6) / (R4*R6+R3*R6+R3*R4).

[0068] When the working state of the input / output pin MCU_PIN is to output a low level, the reference voltage output by the reference voltage circuit is VCC1*(R6 / / R4) / (R3+R6 / / R4).

[0069] Therefore, by adjusting the reference voltage output by the reference voltage circuit, the required controlled heating temperature can be adjusted.

[0070] In one example, a switch circuit electrically connected to the output terminal is further included, and the comparison signal is used to control the on or off of the switch circuit.

[0071] In the example shown in the figure, the switching circuit includes a third resistor R2 and a transistor Q1; the base of the transistor Q1 is electrically connected to the output end of the comparator U1A through the third resistor R2, the emitter of the transistor Q1 is grounded, and the collector of the transistor Q1 outputs a conduction signal (ON) or a disconnection signal (OFF).

[0072] When the collector of transistor Q1 outputs an on signal (ON), transistor Q2 can be controlled to be off, thereby disconnecting the motor M from the second power supply voltage VCC2. When the collector of transistor Q1 outputs an off signal (OFF), transistor Q2 can be controlled to be on, thereby maintaining the electrical connection between the motor M and the second power supply voltage VCC2. It will be appreciated that the electrode M shown in the figure can be replaced with other devices, such as the heating element 14.

[0073] In the example shown in the figure, transistor Q2 is an NMOS tube, the gate of the NMOS tube is electrically connected to the collector of the transistor Q1, the source of the NMOS tube is grounded, and the drain of the NMOS tube is electrically connected to the second power supply voltage VCC2 through the motor M.

[0074] The main control signal is also used to control the on or off of the transistor Q2 , and the main control signal may come from the control unit.

[0075] It should be noted that the preferred embodiments of the present application are given in the specification and drawings of this application. However, the present application can be implemented in many different forms and is not limited to the embodiments described in this specification. These embodiments are not intended to be additional limitations on the content of this application. The purpose of providing these embodiments is to make the understanding of the disclosure of this application more thorough and comprehensive. In addition, the above-mentioned technical features can be combined with each other to form various embodiments not listed above, which are all considered to be within the scope of the description of this application; further, it is obvious to those skilled in the art that improvements or changes can be made based on the above description, and all such improvements and changes should fall within the scope of protection of the claims attached to this application.

Claims

1. An aerosol generating device, characterized in that include: A temperature detection circuit is used to detect the temperature of the object to be measured and output a corresponding voltage signal; a reference voltage circuit configured to output a corresponding reference voltage based on a reference voltage; a control unit having input and output pins electrically connected to the reference voltage circuit; the control unit being configured to change the working state of the input and output pins, thereby changing the reference voltage output by the reference voltage circuit; The reference voltage output by the reference voltage circuit is a protection threshold of the voltage signal output by the temperature detection circuit.

2. The aerosol generating device according to claim 1, wherein Also included is a comparison unit; The comparison unit has a first input terminal, a second input terminal and an output terminal; the first input terminal is electrically connected to the temperature detection circuit to obtain the voltage signal output by the temperature detection circuit; The second input terminal is electrically connected to the reference voltage circuit to obtain the reference voltage output by the reference voltage circuit; the output terminal is configured to output a comparison signal based on a comparison between the reference voltage output by the reference voltage circuit and the voltage signal output by the temperature detection circuit.

3. The aerosol generating device according to claim 2, wherein: The reference voltage circuit includes a voltage divider circuit for dividing the reference voltage, and an output end of the voltage divider circuit is electrically connected to the second input end.

4. The aerosol generating device according to claim 3, wherein: The input / output pin is electrically connected to the second input terminal through a first resistor.

5. The aerosol generating device according to claim 3, wherein: The voltage-dividing circuit includes a voltage-dividing resistor and a filter capacitor connected in parallel with the voltage-dividing resistor.

6. The aerosol generating device according to claim 2, wherein: The comparison unit includes a comparator, the first input terminal is a non-inverting input terminal of the comparator, and the second input terminal is an inverting input terminal of the comparator.

7. The aerosol generating device according to claim 6, wherein: The output terminal of the comparator is electrically connected to the positive power supply terminal of the comparator through a second resistor.

8. The aerosol generating device according to claim 2, wherein: It also includes a switch circuit electrically connected to the output end, and the comparison signal is used to control the conduction or disconnection of the switch circuit.

9. The aerosol generating device according to claim 8, characterized in that The switch circuit includes a third resistor and a transistor; The base of the transistor is electrically connected to the output end through the third resistor, the emitter of the transistor is grounded, and the collector of the transistor outputs a conduction signal or a disconnection signal.

10. The aerosol generating device according to claim 1, wherein The working states of the input and output pins include input high impedance state, output high level and output low level.

11. The aerosol generating device according to claim 1, wherein Also included is a heating element for heating the aerosol-forming substrate to generate an aerosol; The temperature detection circuit is used to detect the temperature of the heating element and output a corresponding voltage signal.

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