Aerosol generating device and control method thereof

Abstract

This application discloses an aerosol generating device and a control method thereof. The aerosol generating device includes a battery cell for supplying power, a heat-sensitive element whose resistance value changes with a change in heating temperature, a sampling resistor for electrically connecting with the heat-sensitive element to form a detection circuit, and a controller configured to determine the heating temperature based on a ratio of any two electrical characteristics of the detection circuit, the sampling resistor, and the heat-sensitive element. The aerosol generating device described above facilitates temperature control by forming a detection circuit with the sampling resistor and the heat-sensitive element and determining a temperature to heat an aerosol-forming substrate based on a ratio of any two electrical characteristics of the detection circuit, the sampling resistor, and the heat-sensitive element.

Description

[Technical Field]

[0001] (CROSS-REFERENCE TO RELATED APPLICATIONS) This application claims priority to a Chinese patent application filed with the China Patent Office on October 27, 2021, bearing application number 202111252866.8 and entitled "Aerosol generating device and control method therefor," the entire contents of which are incorporated herein by reference.

[0002] FIELD OF THE INVENTION The present application relates to the technical field of electronic atomization, and more particularly to an aerosol generating device and a method for controlling the same. [Background technology]

[0003] Tobacco products (e.g., cigarettes, cigars, etc.) burn tobacco to produce tobacco smoke during use. As an alternative to these combustible tobacco products, attempts have been made to create products that release compounds without combustion.

[0004] An example of such a product is a heat-not-burn device, which releases a compound by heating, rather than burning, a material. The material may be, for example, a tobacco product or other non-tobacco product. The other non-tobacco product may or may not contain nicotine. Another example is an electronic atomization device, which typically contains a liquid and generates an inhalable aerosol by heating the liquid with a heating element, causing it to vaporize. The liquid may contain nicotine and / or flavoring agents and / or aerosol-generating substances (e.g., glycerin).

[0005] The above-mentioned heating device usually determines the operating temperature of the heating element by calculating the resistance value of a resistor with a temperature coefficient, but in order to avoid interference problems caused by unstable power supply, a filter circuit must be added to ensure the accuracy of the calculated resistance value of the resistor. Summary of the Invention

[0006] One embodiment of the present application is an aerosol generating device configured to heat an aerosol-forming substrate to generate an aerosol, comprising: a battery cell for supplying power; a heat-sensitive element whose resistance value changes with a change in heating temperature; a sampling resistor electrically connected to the thermal element to form a detection circuit; and a controller configured to determine the heating temperature based on a ratio of any two electrical characteristics of the detection circuit, the sampling resistor, and the heat-sensitive element.

[0007] In one example, the controller is further configured to detect any two of the electrical characteristics.

[0008] In one example, the controller is further configured to obtain the heating temperature based on the ratio and pre-stored correspondence data between the ratio and the heating temperature.

[0009] In one example, the controller is further configured to search the correspondence data.

[0010] In one example, the sampling resistor is connected in series with the thermal sensitive element.

[0011] The electrical characteristics include voltage; The ratio is The ratio includes at least one of the ratio of the voltage across the detection circuit to the voltage across the sampling resistor, the ratio of the voltage across the detection circuit to the voltage across the thermal sensitive element, and the ratio of the voltage across the sampling resistor to the voltage across the thermal sensitive element.

[0012] In one example, the sampling resistor is connected in parallel with the thermal sensitive element.

[0013] The electrical characteristics include current; The ratio includes the ratio of the current flowing through the sampling resistor to the current flowing through the thermal sensitive element.

[0014] In one example, the sol generator further includes the switching transistor, The controller is further configured to control the switching transistor to turn on or off an electrical connection between the detection circuit and the battery cell.

[0015] In one example, the sol-generating device further comprises a heating element for heating the aerosol-forming substrate; The heat sensitive element is disposed near the heating element.

[0016] In one example, the heat sensitive element is adapted to be operable to heat an aerosol forming substrate.

[0017] In one example, the aerosol-forming substrate is in solid or liquid form.

[0018] One embodiment of the present application is an aerosol generating device configured to heat an aerosol-forming substrate to generate an aerosol, comprising: a battery cell for supplying power; a heat-sensitive element whose resistance value changes with a change in heating temperature; a sampling resistor electrically connected to the thermal element to form a detection circuit; and a controller configured to control the ratio of any two electrical characteristics of the detection circuit, the sampling resistor, and the heat-sensitive element to maintain the ratio at a preset value or within a preset range.

[0019] One embodiment of the present application is a battery cell for supplying power; a heating element for heating the aerosol-forming substrate to generate an aerosol; a sampling resistor electrically connected to the heating element to form a detection circuit; and a controller configured to determine a heating temperature of the heating element based on a ratio of any two electrical characteristics of the detection circuit, the sampling resistor, and the heating element.

[0020] Further examples of the present application include: The present invention further provides a method for controlling an aerosol generating device, which includes determining a ratio based on any two electrical characteristics of the detection circuit, the sampling resistor, and the heat-sensitive element, and determining a temperature to heat the aerosol-forming substrate.

[0021] The above-mentioned aerosol generating device forms a detection circuit using a sampling resistor and a heat-sensitive element, and facilitates temperature control by determining the temperature to which the aerosol-forming substrate is heated based on the ratio of any two electrical characteristics among the electrical characteristics of the detection circuit, the electrical characteristics of the sampling resistor, and the electrical characteristics of the heat-sensitive element. [Brief explanation of the drawings]

[0022] One or more embodiments are illustrated by way of example, not limitation, in the accompanying drawings, in which like reference numerals represent similar elements and the drawings are not to scale unless otherwise specified. [Figure 1] 1 is a schematic diagram of an aerosol generating device provided in an example of the present application. [Figure 2] FIG. 1 is a schematic diagram of another aerosol generating device provided in an example of the present application. [Figure 3] FIG. 1 is a schematic diagram of the basic components of one embodiment of a circuit provided in an embodiment of the present application. [Figure 4] FIG. 2 is a schematic diagram of the basic components of another embodiment of a circuit provided in an embodiment of the present application. [Figure 5]FIG. 10 is a schematic diagram of the basic components of yet another embodiment of a circuit provided in an embodiment of the present application. [Figure 6] FIG. 10 is a schematic diagram of the basic components of a further embodiment of a circuit provided in an embodiment of the present application. [Figure 7] 1 is a schematic diagram of the control process of the aerosol generating device provided in the examples of the present application. DETAILED DESCRIPTION OF THE INVENTION

[0023] In order to facilitate understanding of the present application, the present application will now be described in more detail with reference to the accompanying drawings and specific embodiments.

[0024] FIG. 1 is a schematic diagram of an aerosol generating device provided by an embodiment of the present application.

[0025] As shown in Figure 1, the aerosol generator a chamber A in which an aerosol-generating product B is contained so as to be capable of being discharged; a heating element 10 that can be inserted into the aerosol-generating product B when the aerosol-generating product B is contained in the chamber A and can heat the aerosol to generate it; a battery cell 20 for supplying power; and a circuit 30 disposed between the battery cell 20 and the heating element 10. The circuit 30 is used to control the aerosol generating device, for example, by controlling the supply of power from the battery cell 20 to the heating element 10.

[0026] Aerosol-generating product B preferably employs a tobacco-containing material that releases volatile compounds from the substrate when heated. Alternatively, it may be a non-tobacco material that is suitable for electrically heated smoking after heating. Aerosol-generating product B preferably employs a solid substrate and may include one or more of powders, granules, shreds, strips, or sheets of one or more of vanilla leaf, tobacco leaf, homogenized tobacco, and expanded tobacco. Alternatively, the solid substrate may include additional tobacco or non-tobacco volatile flavor compounds to be released when the substrate is heated.

[0027] The heating method of the heating element 10 includes, but is not limited to, resistance heating, electromagnetic heating, and infrared heating. The shape of the heating element 10 includes, but is not limited to, a needle shape, a pin shape, or a sheet shape.

[0028] Furthermore, unlike the example of Figure 1, in other examples, the heating element 10 is configured to heat at least a portion of the aerosol-generating product B, i.e., what is commonly referred to as circumferential heating or peripheral heating, etc., may also be applied.

[0029] FIG. 2 is a schematic diagram of another aerosol generating device provided by an embodiment of the present application.

[0030] As shown in FIG. 2, the aerosol generating device includes an atomizer 100 that stores a liquid aerosol-forming substrate and generates an aerosol by heating and atomizing the liquid aerosol-forming substrate, and a power supply 200 that supplies power to the atomizer 100.

[0031] 2, the power supply unit 200 is provided at one end in the longitudinal direction and includes a receiving cavity 270 for receiving at least a portion of the atomizer 100. The power supply unit 200 further includes a first electrical contact 230 that is at least partially exposed on the surface of the receiving cavity 270 and that electrically connects with the atomizer 100 to supply power to the atomizer 100 when at least a portion of the atomizer 100 is received in the power supply unit 200.

[0032] According to a preferred embodiment shown in FIG. 2, a second electrical contact 104 is provided at the longitudinal end of the atomizer 100 facing the power supply unit 200, so that when at least a portion of the atomizer 100 is accommodated in the accommodation cavity 270, the second electrical contact 104 abuts against the first electrical contact 230 to establish electrical conduction.

[0033] The power supply unit 200 is provided with a seal 260, and at least a portion of the internal space of the power supply unit 200 is partitioned by the seal 260 to form the above-mentioned storage cavity 270. In the preferred embodiment shown in Fig. 2, the seal 260 is configured to extend along the cross-sectional direction of the power supply unit 200 and is preferably made of a flexible material (e.g., silicone), thereby preventing the aerosol-forming substance that permeates from the atomizer 100 into the storage cavity 270 from flowing to components inside the power supply unit 200, such as the circuit 220 and the airflow sensor 250.

[0034] In a preferred implementation shown in FIG. 2, the power supply 200 is longitudinally spaced from the receiving cavity 270 and further includes a battery cell 210 for providing electrical power.

[0035] The power supply 200 further includes a circuit 220 that selectively directs electrical current between the battery cell 210 and the first electrical contact 230 .

[0036] The power supply device 200 further includes an airflow sensor 250 for detecting an inhalation airflow generated when a user inhales through the atomizer 100. The circuit 220 controls the battery cell 210 to output power to the atomizer 100 according to the detection signal of the airflow sensor 250.

[0037] Additionally, in the preferred implementation shown in FIG. 2, the power supply device 200 is provided at the other end remote from the receiving cavity 270 with a charging port 240 for charging the battery cells 210 .

[0038] In an alternative embodiment, such as the embodiment shown in FIG. 2, the atomizer 100 comprises: a liquid storage cavity 101 for storing a liquid aerosol-forming substrate; a heating element 103 for generating an aerosol by heating and atomizing a liquid aerosol-forming substrate; and a liquid conducting element 102 for communicating the liquid aerosol forming substance between the liquid storage cavity 101 and the heating element 103.

[0039] In an alternative embodiment, the liquid aerosol-forming substrate preferably comprises a tobacco-containing material containing volatile tobacco flavor compounds that are released from the liquid aerosol-forming substrate upon heating. Alternatively or additionally, the liquid aerosol-forming substrate may comprise a non-tobacco material. The liquid aerosol-forming substrate may comprise water, ethanol, or other solvents, as well as plant extracts, nicotine solutions, and natural or artificial flavorings. Preferably, the liquid aerosol-forming substrate further comprises an aerosol-forming agent. Examples of suitable aerosol-forming agents are glycerol and / or propylene glycol.

[0040] 2, the liquid conducting element 102 is configured in a hollow columnar shape extending along the longitudinal direction of the atomizer 100, and the heating element 103 is formed in the columnar hollow of the liquid conducting element 102. In use, as shown by arrow R1, the liquid aerosol-forming substance in the liquid storage cavity 101 is absorbed along the radially outer surface of the liquid conducting element 102, and then conducted to the inner surface of the heating element 103, where it is heated and vaporized, thereby generating an aerosol. The generated aerosol is released from the columnar hollow of the liquid conducting element 102 along the longitudinal direction of the atomizer 100, as shown by arrow R2 in FIG.

[0041] In other variants, the liquid conducting element 102 includes flexible fibers such as cotton fibers, nonwoven fabrics, and glass fiber ropes, or includes porous ceramics with a microporous structure. In specific implementations, the structure of the liquid conducting element 102 using porous ceramics can be various regular or irregular shapes, such as those described in Patent CN212590248U.

[0042] In some embodiments, the heating element 103 is a structure such as a heating wire or a heating sheet, and is bonded to the liquid conducting element 102 so as to be in contact with it. Alternatively, in other variations, the heating element 103 may be bonded to the liquid conducting element 102 by printing, deposition, sintering, physical assembly, or the like. In some other variations, the liquid conducting element 102 using porous ceramics may have a flat or curved surface for supporting the heating element 103. The heating element 103 is formed on the flat or curved surface of the liquid conducting element 102 by bonding, printing, deposition, or the like.

[0043] The material of the heating element 103 may be a metal material, metal alloy, graphite, carbon, conductive ceramic or composite material of other ceramic material and metal material having suitable impedance. Suitable metal or alloy materials include at least one of nickel, cobalt, zirconium, titanium, nickel alloy, cobalt alloy, zirconium alloy, titanium alloy, nickel chromium alloy, nickel iron alloy, iron chromium alloy, iron chromium aluminum alloy, titanium alloy, iron manganese aluminum alloy, stainless steel, etc.

[0044] Based on the aerosol generating device shown in Figures 1 and 2, by controlling the power supply to the heating element (10, 103) by the battery cell (20, 220), it is necessary to monitor the temperature at which the aerosol-forming substrate is heated by the heating element (10, 103) in order to provide a better user experience.

[0045] In an alternative implementation, the real-time temperature of the heating element (10, 103) is detected by a thermal element provided near the heating element (10, 103). The thermal element has a resistance value that changes with the change in heating temperature, and is generally divided into a positive temperature coefficient thermal element and a negative temperature coefficient thermal element according to the temperature coefficient.

[0046] In another alternative implementation, the heating element (10, 103) may be used to heat the aerosol-forming substrate and also as a heat-sensing element for detecting real-time temperature. For example, the resistive material of the heating element 103 may be a metal or alloy material having a suitable temperature coefficient of resistance, e.g., a positive or negative temperature coefficient. In this manner, the heating element 103 may be used to generate heat and also as a sensor for detecting the real-time temperature of the heating element 103.

[0047] For ease of explanation, reference will now be made to FIG. 2 to describe an example of a heating element that can be used to heat an aerosol-forming substrate and that may also be used as a heat-sensitive element for real-time temperature detection.

[0048] FIG. 3 shows a schematic diagram of the basic components of one embodiment of circuit 220.

[0049] As shown in FIG. 3, the circuit 220 a first switching transistor Q1 located between the battery cell 210 and the heating element 103 (shown as R2 in FIG. 3 ) for, when turned on, allowing power to be supplied from the battery cell 210 to the heating element 103; The sampling resistor R1 is located between the second switching transistor Q2 and the heating element 103. Specifically, the sampling resistor R1 has a first end connected to the second switching transistor Q2 and a second end connected to the heating element 103. The sampling resistor R1 is a standard resistor with a substantially constant resistance value in the range of 0.1 mΩ to 1000 kΩ. When the second switching transistor Q2 is turned on, the sampling resistor R1 is connected in series with the heating element 103 to form a detection circuit capable of detecting the voltage across the sampling resistor R1 and the heating element 103 by voltage division. Of course, when detection is not required, the second switching transistor Q2 is turned off to disconnect the detection circuit.

[0050] 3, the first end of the heating element 103 has two circuits: one circuit connected to the first switching transistor Q1 and the other circuit connected in series with the sampling resistor R1. The second end of the heating element 103 is grounded, so the potential of the second end of the heating element 103 is 0.

[0051] 3, the first switching transistor Q1 and the second switching transistor Q2 are controlled to be turned on / off by the controller 221, and the first switching transistor Q1 and the second switching transistor Q2 are not turned on at the same time. The controller 221 may include, but is not limited to, a microcontroller unit MCU. When power needs to be supplied to the heating element 103, the controller 221 controls the first switching transistor Q1 to be turned on and the second switching transistor Q2 to be turned off, thereby supplying power from the battery core 210 to the heating element 103. When the heating temperature of the heating element 103 needs to be detected, the control unit 221 controls the first switching transistor Q1 to be turned off and the second switching transistor Q2 to be turned on, thereby determining the heating temperature based on the electrical characteristics, such as the voltage, of the detection circuit, the sampling resistor R1, and the heating element 103.

[0052] The voltage across the sampling resistor R1 is V1, and the voltage across the heating element 103 is V2. During the detection process, the controller 221 may sample the voltage at the first end of the resistor R1, i.e., the voltage at the sampling point a1 in FIG. 3, i.e., the voltage across the detection circuit, as Va1, and sample the voltage at the first end of the heating element 103, i.e., the voltage Vb1 at the sampling point b1 in FIG. 3. Because the second end of the heating element 103 in FIG. 3 is grounded, the voltage Vb1=V2 at the sampling point b1, and the voltage across the sampling resistor R1 is V1=Va1-V2.

[0053] Based on the above-mentioned relevant electrical characteristics, the controller 221 may determine a key value K, and based on the key value K, search for a heating temperature corresponding to the key value K from pre-stored correspondence data between key values ​​and heating temperatures.

[0054] Specifically, this can be achieved in the following different ways.

[0055] 1) JPEG0007822471000001.jpg1127, of which the K value is JPEG0007822471000002.jpg1116, that is, the ratio of the voltage across the sampling resistor R1 to the voltage across the heating element 103, where the sampling resistor R1 is a predetermined standard resistor with a constant resistance, and R2 is the bulk resistance of the heating element 103. When generating the correspondence data between the key value and the heating temperature, the TCR calculation formula (or an index table for a separate thermal element) is used based on the resistance value of the sampling resistor R1: JPEG0007822471000003.jpg106 needs to be converted into a corresponding heating temperature, so that a (K-T) temperature table can be created and stored in the controller 221 or memory. After that, when the key value K is determined, the corresponding heating temperature can be obtained from the (KT) temperature table. In this way, the corresponding heating temperature can be obtained without calculating the bulk resistance R2 of the heating element 103. Meanwhile, when jitter changes occur in the VCC voltage, Va1 , JPEG0007822471000004.jpg107, V b1 The voltage values ​​of the sampling resistor R1 and the heating element 103 are also proportionally changed at the same time, so that a good anti-interference effect can be achieved without the need for an additional filter circuit. Note that the above K value can also be realized inversely, that is, the ratio between the voltage across the sampling resistor R1 and the voltage across the heating element 103 has a K value of This includes JPEG0007822471000005.jpg1016. 2) JPEG0007822471000006.jpg1026, of which the K value is JPEG0007822471000007.jpg107, that is, the ratio of the voltage across the detection circuit to the voltage across the heating element 103, and the rest can refer to Method 1. 3) JPEG0007822471000008.jpg1135, of which the K value is JPEG0007822471000009.jpg1016, that is, the ratio of the voltage across the detection circuit to the voltage across the sampling resistor R1, and the rest can refer to Method 1.

[0056] 4 shows a schematic diagram of the basic components of another embodiment of circuit 220. It differs from the example of FIG. 3 in that the positions of sampling resistor R1 and heating element 103 (shown as R2 in the figure) have been swapped.

[0057] As in FIG. 3, the heating temperature can be determined by determining the key value K in the following different ways.

[0058] 11) JPEG0007822471000010.jpg1028 and the K value is JPEG0007822471000011.jpg1017, i.e., the ratio of the voltage across the heating element 103 to the voltage across the sampling resistor R1. 12) JPEG0007822471000012.jpg1026, and the K value is JPEG0007822471000013.jpg1017, i.e., the ratio of the voltage across the detection circuit to the voltage across the sampling resistor R1. 13) JPEG0007822471000014.jpg1035 and the K value is JPEG0007822471000015.jpg1016, i.e., the ratio of the voltage across the detection circuit to the voltage across the heating element 103.

[0059] 5 shows a schematic diagram of the basic components of yet another embodiment of the circuit 220. The second end of the heating element 103 is not grounded, and the controller 221 sets the voltage at the second end c3 of the heating element 103 to V c3 This differs from the example in Figure 3 in that the sample is sampled or detected as

[0060] As in Figure 3, the heating temperature can be determined by determining the key value K in the following different ways: twenty one) JPEG0007822471000016.jpg1027, of which the K value is JPEG0007822471000017.jpg1116, i.e., the ratio of the voltage across the sampling resistor R1 to the voltage across the heating element 103. twenty two) JPEG0007822471000018.jpg1035, of which the K value is JPEG0007822471000019.jpg1016, i.e., the ratio of the voltage across the detection circuit to the voltage across the heating element 103. twenty three) JPEG0007822471000020.jpg1035, of which the K value is JPEG0007822471000021.jpg1116, i.e., the ratio of the voltage across the detection circuit to the voltage across the sampling resistor R1.

[0061] Obviously, similar to FIG. 4, even if the positions of the sampling resistor R1 and the heating element 103 are interchanged in FIG. 5, the corresponding key value K can be determined in the same way, and thus the heating temperature can be determined.

[0062] 6 shows a schematic diagram of the basic components of a further embodiment of the circuit 220. The circuit 220 differs from the example of FIG. 3 in that the sampling resistor R1 is connected in parallel with the heating element 103, and when the controller 221a simultaneously controls the first switching transistor Q1 and the second switching transistor Q2 to be on, a detection circuit is formed between the sampling resistor R1 and the heating element 103, and when detection is not required, the second switching transistor Q2 is controlled to be off.

[0063] As in Figure 3, the heating temperature can be determined by determining the key value K in the following different ways:

[0064] 31) JPEG0007822471000022.jpg1015, of which the K value is JPEG0007822471000023.jpg105, i.e., the ratio of the current through the sampling resistor R1 to the current through the heating element 103. 32) JPEG0007822471000024.jpg1016, of which the K value is JPEG0007822471000025.jpg105, i.e., the ratio of the current through the heating element 103 to the current through the sampling resistor R1.

[0065] In another embodiment, the controller is configured to control a ratio of any two of the electrical characteristics of the detection circuit, the electrical characteristic of the sampling resistor, and the electrical characteristic of the thermal sensitive element to a preset value or within a preset range.

[0066] Specifically, based on the aerosol generating device shown in FIG. 1 , the temperature of the heating element 10 needs to be controlled in different stages. For example, in the preheating stage, the temperature of the heating element 10 needs to reach a maximum temperature quickly and then be maintained at the maximum temperature for a certain period of time. Also, in the inhalation stage or constant temperature stage, the temperature of the heating element 10 needs to be controlled to a preset value or within a preset range. Therefore, the temperature of the heating element 10 can be controlled by directly controlling the ratio of any two electrical characteristics to a preset value or within a preset range using a controller. Taking the preheating stage as an example, the controller determines whether the temperature of the heating element 10 has reached the maximum temperature by determining whether the ratio of any two electrical characteristics has reached a preset value, and then controls the power supply from the battery core 20 to the heating element 30 accordingly.

[0067] In this embodiment, the ratio of any two electrical characteristics can be referred to in FIGS. 3 to 6 and the above description, and will not be described again here.

[0068] Another embodiment of the present application further provides a method for controlling an aerosol generating device, and the aerosol generating device can refer to the above-mentioned content.

[0069] The method comprises: The method includes determining a ratio based on any two electrical characteristics of the detection circuit, the sampling resistor, and the heat-sensing element, and determining the temperature to heat the aerosol-forming substrate.

[0070] The control process of the aerosol generating device in FIG. 2 will be described below with reference to FIGS.

[0071] In step S11, the first switching transistor Q1 is controlled to be turned off, and the second switching transistor Q2 is controlled to be turned on.

[0072] In step S12, the detection ports are opened to detect the voltage at sampling point a1 and the voltage at sampling point b1, and the voltage at a1 is designated Va1 and the voltage at sampling point b1 is designated Vb1.

[0073] In step S13, a key value K is calculated based on the voltage at the sampling point a1 and the voltage at the sampling point b1, where the K value is JPEG0007822471000026.jpg1117, i.e., the ratio of the voltage across the sampling resistor R1 to the voltage across the heating element 103.

[0074] In step S14, a heating temperature corresponding to the key value K is searched from pre-stored correspondence data between key values ​​and heating temperatures, and the key value K is searched from a pre-stored (KT) temperature table. Search for the heating temperature corresponding to JPEG0007822471000027.jpg1026.

[0075] It should be noted that although preferred embodiments of the present application are provided in the specification and drawings of the present application, the present application is not limited to the embodiments described in the present specification. Furthermore, a person skilled in the art may make improvements or modifications based on the above description, and all of these improvements and modifications should fall within the scope of protection of the claims attached to the present application.

Claims

1. 1. An aerosol generating device configured to heat an aerosol-forming substrate to generate an aerosol, comprising: a battery cell for supplying power; a heat-sensitive element whose resistance value changes with a change in heating temperature; a sampling resistor connected in series with the thermal element to form a detection circuit; a controller configured to determine a ratio between any two electrical characteristics of the detection circuit, the sampling resistor, and the heat-sensitive element, and to determine the heating temperature based on the ratio and pre-stored correspondence data between the ratio and the heating temperature; the battery cell and the thermal sensitive element are electrically connected by a first switching transistor, the battery cell and the sampling resistor are electrically connected by a second switching transistor, a first end of the sampling resistor is electrically connected to the second switching transistor, and a second end of the sampling resistor is electrically connected to the thermal sensitive element; the first switching transistor and the second switching transistor are controlled to be turned on or off by the controller so that they are not turned on at the same time; the electrical property includes voltage; The ratio is An aerosol generating device comprising at least one of a ratio of the voltage across the detection circuit to the voltage across the sampling resistor, a ratio of the voltage across the detection circuit to the voltage across the thermal sensitive element, and a ratio of the voltage across the sampling resistor to the voltage across the thermal sensitive element.

2. The aerosol generating device of claim 1 , wherein the controller is further configured to detect any two of the electrical characteristics.

3. The aerosol generating device of claim 1 , wherein the controller is further configured to search through the correspondence data.

4. 1. An aerosol generating device configured to heat an aerosol-forming substrate to generate an aerosol, comprising: a battery cell for supplying power; a heat-sensitive element whose resistance value changes with a change in heating temperature; a sampling resistor connected in parallel with the thermal element to form a detection circuit; a controller configured to determine the heating temperature based on a ratio of a current through the sampling resistor to a current through the heat sensitive element.

5. The aerosol generating device according to claim 4 , wherein the controller is further configured to obtain the heating temperature based on the ratio and pre-stored correspondence data between the ratio and the heating temperature.

6. further comprising a switching transistor; 6. The aerosol generating device according to claim 4 or 5, wherein the controller is further configured to control the switching transistor to turn on or off an electrical connection between the detection circuit and the battery cell.

7. further comprising a heating element for heating the aerosol-forming substrate; 6. The aerosol generating device according to claim 1, wherein the heat-sensitive element is provided near the heating element.

8. 6. An aerosol generating device according to claim 1, wherein the heat-sensitive element is adapted to be used to heat an aerosol-forming substrate.

9. 6. The aerosol generating device according to claim 1, wherein the aerosol-forming substrate is in a solid or liquid state.

10. 1. An aerosol generating device configured to heat an aerosol-forming substrate to generate an aerosol, comprising: a battery cell for supplying power; a heat-sensitive element whose resistance value changes with a change in heating temperature; a sampling resistor connected in series with the thermal element to form a detection circuit; a controller configured to control a ratio of any two of the electrical characteristics of the detection circuit, the electrical characteristic of the sampling resistor, and the electrical characteristic of the heat-sensitive element to a preset value or within a preset range; the battery cell and the thermal sensitive element are electrically connected by a first switching transistor, the battery cell and the sampling resistor are electrically connected by a second switching transistor, a first end of the sampling resistor is electrically connected to the second switching transistor, and a second end of the sampling resistor is electrically connected to the thermal sensitive element; the first switching transistor and the second switching transistor are controlled to be turned on or off by the controller so that they are not turned on at the same time; the electrical property includes voltage; The ratio is An aerosol generating device comprising at least one of a ratio of the voltage across the detection circuit to the voltage across the sampling resistor, a ratio of the voltage across the detection circuit to the voltage across the thermal sensitive element, and a ratio of the voltage across the sampling resistor to the voltage across the thermal sensitive element.

11. 1. An aerosol generating device configured to heat an aerosol-forming substrate to generate an aerosol, comprising: a battery cell for supplying power; a heat-sensitive element whose resistance value changes with a change in heating temperature; a sampling resistor connected in parallel with the thermal element to form a detection circuit; and a controller configured to control the ratio of the current flowing through the sampling resistor to the current flowing through the heat-sensitive element to a preset value or within a preset range.

12. a battery cell for supplying power; a heating element for heating the aerosol-forming substrate to generate an aerosol; a sampling resistor connected in series with the heating element to form a detection circuit; a controller configured to determine a ratio between any two electrical characteristics of the detection circuit, the sampling resistor, and the heating element, and to determine a heating temperature of the heating element based on the ratio and pre-stored correspondence data between the ratio and the heating temperature; the battery cell and the thermal sensitive element are electrically connected by a first switching transistor, the battery cell and the sampling resistor are electrically connected by a second switching transistor, a first end of the sampling resistor is electrically connected to the second switching transistor, and a second end of the sampling resistor is electrically connected to the thermal sensitive element; the first switching transistor and the second switching transistor are controlled to be turned on or off by the controller so that they are not turned on at the same time; the electrical property includes voltage; The ratio is An aerosol generating device comprising at least one of a ratio of the voltage across the detection circuit to the voltage across the sampling resistor, a ratio of the voltage across the detection circuit to the voltage across the thermal sensitive element, and a ratio of the voltage across the sampling resistor to the voltage across the thermal sensitive element.

13. a battery cell for supplying power; a heating element for heating the aerosol-forming substrate to generate an aerosol; a sampling resistor connected in parallel with the heating element to form a detection circuit; a controller configured to determine a heating temperature of the heating element based on a ratio of a current flowing through the sampling resistor to a current flowing through the heating element.

14. Turning off a first switching transistor electrically connected between the thermal element and the battery cell to cut off the electrical connection between the thermal element and the battery cell; turning on a second switching transistor electrically connected between the battery cell and the sampling resistor to electrically connect the sampling resistor and the battery cell, and the sampling resistor and the thermal sensitive element are connected in series to form a detection circuit, where a first end of the sampling resistor is electrically connected to the second switching transistor and a second end of the sampling resistor is electrically connected to the thermal sensitive element; determining a ratio based on any two of the electrical characteristics of the detection circuit, the electrical characteristics of the sampling resistor, and the electrical characteristics of the heat-sensitive element, and determining a temperature to heat the aerosol-forming substrate based on the ratio and pre-stored correspondence data between the ratio and the heating temperature; Including, the electrical property includes voltage; The ratio is A method for controlling an aerosol generating device, comprising at least one of a ratio between the voltage across the detection circuit and the voltage across the sampling resistor, a ratio between the voltage across the detection circuit and the voltage across the thermal sensitive element, and a ratio between the voltage across the sampling resistor and the voltage across the thermal sensitive element.

15. determining a temperature to heat the aerosol-forming substrate based on a ratio of the current through the sampling resistor to the current through the heat-sensitive element; wherein the sampling resistor is connected in parallel with the heat-sensitive element.

Images