25 and the second conductor 26 as the initial electrical parameter. When the aerosol-generation product 10 is inserted into the electronic vaporization device 20, the aerosol-generation product 10 is in sufficient contact with the first conductor 25, and electrically connects the first conductor 25 to the second conductor 26, which changes the capacitance value and the resistance value between the first conductor 25 and the second conductor 26. The sampling unit 24 collects the electrical parameter between the first conductor 25 and the second conductor 26 again. The control unit 23 compares the initial electrical parameter collected by the sampling unit 24 with the electrical parameter after the first conductor 25 and the second conductor 26 are electrically connected, obtains a first difference between the two electrical parameters through algorithm filtering, compares the difference with a preset threshold to obtain a second difference, and obtains the liquid content of the aerosol-generation product 10 according to the second difference by table look-up or calculation. The liquid content of the aerosol-generation product 10 found through table look-up according to the preset threshold and the second difference is obtained by experiments and tests, and is pre-stored in the control unit 23.

The first conductor 25 and the second conductor 26 are equivalent to a transceiver for capacitance sensing and resistance measurement, which receives and sends a capacitance sensing signal and a resistance change signal.

In an implementation, the heating unit 21 further includes an insulator 27 arranged between the first conductor 25 and the second conductor 26 for spacing the first conductor 25 apart from the second conductor 26. The insulator 27 has a through hole, and the aerosol-generation product 10 can pass through the first conductor 25 and the insulator 27 and is electrically connected to the second conductor 26. In an embodiment, the insulator 27 is an annular body. The first conductor 25 is arranged on a top of the insulator 27 and is arranged coaxially with the insulator 27, and the second conductor 26 is arranged on a bottom of the insulator 27 and covers the bottom of the insulator 27. The second conductor 26 also has an air inlet hole in communication with inside of the insulator 27.

In a specific implementation, the insulator 27 is an annular body with a flange on an inner wall. An upper surface of the flange abuts against a bottom end of the first conductor 25, and an outer sidewall of the first conductor 25 abuts against an inner sidewall of the insulator 27. The second conductor 26 is arranged on a lower surface of the flange and covers the bottom of the insulator 27. The first conductor 25, the second conductor 26, and the insulator 27 may be in interference fit or may be bonded, so as to simplify an assembly process of the electronic vaporization device.

In an embodiment, the heating unit 21 performs electromagnetic heating. Specifically, the first conductor 25 is further used as a heating element, and the heating unit 21 further includes an electromagnetic coil, and the electromagnetic coil surrounds the first conductor 25. Therefore, when electrified, the first conductor 25 generates heat by electromagnetic induction to heat and vaporize the aerosol-generation product 10.

In another embodiment, the heating unit 21 performs resistive heating, and the heating unit 21 is a heating element arranged independently. The heating element may be a centrally needle-shaped or centrally sheet-shaped heating element, is arranged on the second conductor 26, and is configured to be inserted into the aerosol-generation product 10 to heat and vaporize the aerosol-generation product 10.

In an embodiment, the electronic vaporization device 20 further includes a detection unit for detecting whether the aerosol-generation product 10 is inserted into the electronic vaporization device 20. When it is detected that the aerosol-generation product 10 is inserted into the electronic vaporization device 20, the sampling unit 24 and the control unit 23 collect and obtain the liquid content of the aerosol-generation product 10. In some optional embodiments, the sampling unit 24 may be used as a detection unit. For example, the sampling unit 24 constantly applies a voltage between the first conductor 25 and the second conductor 26 to collect at any time the initial electrical parameter and the electrical parameter after the first conductor 25 and the second conductor 26 are electrically connected, and send the electrical parameters to the control unit 23 for calculation to obtain the liquid content of the aerosol-generation product 10. When it is detected that the electrical insulation between the first conductor 25 and the second conductor 26 changes to electrical connection, it is determined that the aerosol-generation product 10 is inserted into the electronic vaporization device 20. In this way, it can be ensured that detection of the liquid content is initiated each time the aerosol-generation product 10 is replaced with a new one. In another optional implementation, the detection unit may be an optical sensor arranged on the inner sidewall of the insulator 27 to detect by optical sensing whether the aerosol-generation product 10 is inserted into the electronic vaporization device 20. Alternatively, the detection unit may be a pressure sensor arranged on the second conductor 26 to detect by pressure sensing whether the aerosol-generation product 10 is inserted into the electronic vaporization device 20. The sampling unit 24 may alternatively start to apply a voltage between the first conductor 25 and the second conductor 26 when the detection unit detects that the aerosol-generation product 10 is inserted into the electronic vaporization device 20, collect the electrical parameter after the first conductor 25 and the second conductor 26 are electrically connected, and send the collected electrical parameter to the control unit 23. The control unit 23 compares the pre-stored initial electrical parameter with the electrical parameter after the first conductor 25 and the second conductor 26 are electrically connected, to obtain the liquid content of the aerosol-generation product 10. A specific implementation may be selected according to actual requirements, which is not limited herein.

An aerosol-generation product 10 that is not pulled out of the electronic vaporization device 20 and has been used for a long time absorbs moisture with time. Therefore, in this application, the detection unit is further configured to determine a time interval from a last inhale signal after detecting an inhale signal of a user. If the time interval exceeds a preset time threshold, the sampling unit 24 and the control unit 23 collect and obtain the liquid content of the aerosol-generation product 10 again. The preset time threshold may be 4 hours, 8 hours, or 24 hours, which is selected according to a situation. If the local climate is humid, the preset time threshold may be properly reduced. If the local climate is dry, the preset time threshold may be properly increased.

The control unit 23 controls, according to the liquid content of the aerosol-generation product 10, the heating unit 21 to heat the aerosol-generation product 10. For a method for heating the aerosol-generation product, relevant data may be obtained in advance by experiments and pre-stored in the control unit 23. Specifically, in normal cases, a time the electronic vaporization device 20 preheats the aerosol-generation product 10 is generally 15-25 seconds, and a preheating temperature is 240-250 degrees Celsius. A total power for preheating an aerosol-generation product 10 that is recently opened, that is, that does not absorb moisture, may be calculated according to a heating voltage and a heating resistance.

TABLE 1

Power required for each preheating temperature for aerosol-generation products

Initial
Actual

Time
Voltage
Temperature
TCR
resistance
resistance
Power
Energy

S
V
° C.
ppm
Ω
Ω
W
J

0
5
29
1700
0.92
0.934076
26.76441746
0

1
5
47
1700
0.92
0.962228
25.98136824
26.37289285

2
5
90
1700
0.92
1.02948
24.2841046
25.13273642

3
5
111
1700
0.92
1.062324
23.53330999
23.90870729

4
5
134
1700
0.92
1.098296
22.76253396
23.14792197

5
5
155
1700
0.92
1.13114
22.10159662
22.43206529

6
5
172
1700
0.92
1.157728
21.59401863
21.84780762

7
5
189
1700
0.92
1.184316
21.10923096
21.35162481

8
5
205
1700
0.92
1.20934
20.6724329
20.89083194

9
5
219
1700
0.92
1.231236
20.3047994
20.48861615

10
5
231
1700
0.92
1.250004
19.999936
20.1523677

11
5
234
1700
0.92
1.154696
19.92514521
19.96254061

12
5
235
1700
0.92
1.25626

9.962572607

13
5
236
1700
0.92
1.257824
19.87559467
9.937797339

14
5
235
1700
0.92
1.25626

9.937797339

15
5
237
1700
0.92
1.259388

0

16
5
239
1700
0.92
1.262516

0

17
5
242
1700
0.92
1.267208
19.72841081
9.864205403

18
5
242
1700
0.92
1.267208

9.864205403

19
5
241
1700
0.92
1.265644

0

20
5
243
1700
0.92
1.268772

0

Total generated heat
295.2546907

Referring to Table 1, it may be learned that the heating element is equivalent to a thermistor, an initial resistance of the heating element is 0.92Ω, and an actual resistance of the heating element varies with a heating temperature.

Since the aerosol-generation product 10 absorbs moisture after being opened, a weight of a single aerosol-generation product 10 increases. Energy power consumption for additional water evaporation may be calculated according to a specific heat capacity of water and heat absorbed by water evaporation.

TABLE 2

Heat and power consumption for water evaporation

in aerosol-generation products

Recently
1 day after

Time after opening
Unit
opened
opening

Weight of 20 pieces
g
10.9567
11.3034

Per weight
g
0.547835
0.56517

Amount of absorbed water
g
0
0.017335

Specific heat capacity of water
J/g*° C.
4.2
4.2

Heat absorbed as a result of a
J
0
5.460525

temperature rise from 25° C.

to 100° C.

Latent heat
J/g
2256
2256

Heat absorbed as a result of
J
0
39.10776

evaporation

Specific heat capacity of
J/g*° C.
1.85
1.85

water vapor

Heat absorbed as a result of a
J
0
0.3206975

temperature rise from 100° C.

to 110° C.

Total absorbed heat
J
0
44.8889825

As shown in Table 2, a boiling point of water is 100 degrees Celsius. Therefore, after the aerosol-generation product 10 that absorbed moisture is preheated to 100 degrees Celsius, the liquid content of the aerosol-generation product 10 approximates 0. After continuous heating, heat and power consumption for the liquid evaporation are substantially 0.

Referring to FIG. 4 and FIG. 5, after the aerosol-generation product 10 is inserted into the first conductor 25, the sampling unit 24 detects an electrical parameter of the aerosol-generation product 10. A dielectric constant of an aerosol-generation product 10 after one day since opening (shown in FIG. 4) and an aerosol-generation product that is recently opened (shown in FIG. 5) are significantly different, indicating that the liquid contents are significantly different. Specifically, before the aerosol-generation product is inserted into the first conductor 25, the control unit 23 constantly calibrates the current potential data as reference potential data, as shown by a line B in the figure. After the aerosol-generation product is inserted into the first conductor 25, the potential data changes, as shown by a line A in the figure. The control unit determines the liquid content in the aerosol-generation product 10 by determining the change of the line A relative to the line B, and determines, by experiments, an amount of heat to be compensated or a heating curve to be used for the aerosol-generation product 10 with a different liquid content. The control unit 23 pre-stores the relevant experiment data, obtains the liquid content of the aerosol-generation product 10 according to the relevant electrical parameter detected by the sampling unit 24, and controls, according to the liquid content, the heating element to heat the aerosol-generation product 10.

Specifically, the control unit 23 obtains the liquid content of the aerosol-generation product 10 by calculation and comparison. In an implementation, the control unit 23 includes a microcontroller unit (MCU) 23. The MCU receives the electrical parameters fed back by the sampling unit 24, determines the liquid content of the aerosol-generation product 10, obtains a preset heating curve matching the liquid content of the aerosol-generation product based on the liquid content of the aerosol-generation product 10, and controls the heating element to heat the aerosol-generation product 10.

In an embodiment, referring to FIG. 6, a preset heating curve set corresponding to different liquid contents in the aerosol-generation product 10 are pre-stored in the control unit 23. The control unit 23 selects a preset heating curve matching a liquid content of a current aerosol-generation product 10 from the pre-stored preset heating curve set. A time and/or a temperature in a different preset heating curve in the preset heating curve set for preheating the aerosol-generation product 10 varies.

For example, when the liquid content of the aerosol-generation product 10 is 0 or lower than a threshold, the time for preheating the aerosol-generation product 10 by the electronic vaporization device 20 is 20 seconds, the preheating temperature is 250 degrees Celsius, and the control unit 23 outputs a standard heating curve. When the liquid content of the aerosol-generation product 10 is higher than the threshold, the control unit 23 outputs a heating curve that has a longer preheating time such as 23 seconds or 25 seconds for the aerosol-generation product 10 than the standard heating curve or that has a higher preheating temperature such as 255 degrees Celsius or 260 degrees Celsius for the aerosol-generation product 10. Alternatively, the preheating temperature and the preheating time for the aerosol-generation product 10 both may be increased, so that the aerosol-generation product 10 can be preheated to a target temperature. In one embodiment, a plurality of threshold intervals may be set, and different heating curves are pre-stored for the different threshold intervals. A corresponding heating curve is selected according to a threshold interval corresponding to the liquid content of the aerosol-generation product 10.

Alternatively, the standard heating curve may be a heating curve when the liquid content of the aerosol-generation product 10 is a certain value, such as a heating curve in a liquid saturated state. When the liquid content of the aerosol-generation product 10 is lower than a saturation value, the control unit 23 may output a heating curve that has a shorter preheating time or a lower preheating temperature for the aerosol-generation product 10 than the standard heating curve. No limitation is imposed herein.

In another implementation, the control unit 23 may compensate for the pre-stored preset heating curve according to the liquid content of the aerosol-generation product 10, so as to change the time and/or the temperature in the preset heating curve for preheating the aerosol-generation product 10. For example, a preset heating curve is stored in the control unit 23, and the preset heating curve corresponds to a certain value of the liquid content of the aerosol-generation product 10. After obtaining the liquid content of the aerosol-generation product 10, the control unit 23 performs logical calculation on the preset heating curve to obtain and output a compensated heating curve, so as to increase or reduce the preheating time or the preheating temperature for the aerosol-generation product 10, so that the aerosol-generation product 10 can be heated to a preset temperature. Specifically, the control unit 23 compensates for the preset heating curve before outputting the heating curve. It may be understood that, in this method, a correspondence table or a relationship expression of the liquid content of the aerosol-generation product 10 and a compensation value is required to be pre-stored, and compensation is performed according to a compensation value corresponding to the liquid content of the aerosol-generation product 10.

The electronic vaporization device 20 provided in this application detects the liquid content of the aerosol-generation product 10 before heating the aerosol-generation product 10, and outputs a corresponding heating curve according to the liquid content of the aerosol-generation product 10. Therefore, the aerosol-generation products 10 with different liquid contents can be fully heated, thereby effectively improving user experience.

FIG. 7 is a schematic flowchart of a method for detecting a liquid content in an aerosol-generation product according to an embodiment of this application. The method specifically includes the following steps:

- Step S11: Space a first conductor apart from a second conductor.

Specifically, the first conductor is spaced apart from the second conductor to block conductivity between the first conductor and the second conductor.

- Step S12: Electrically connect the first conductor to the second conductor through the aerosol-generation product.

The aerosol-generation product is conductive. When the aerosol-generation product is inserted into the electronic vaporization device, the aerosol-generation product is in full contact with the first conductor, and electrically connects the first conductor to the second conductor. The first conductor and the second conductor are equivalent to a transceiver for capacitance sensing and resistance measurement, which receives and sends a capacitance sensing signal and a resistance change signal.

- Step S13: Obtain an electrical parameter between the first conductor and the second conductor.

Specifically, when the first conductor and the second conductor are electrically connected, the capacitance value and the resistance value between the first conductor and the second conductor change, and the sampling unit collects the electrical parameter between the first conductor and the second conductor.

- Step S14: Obtain a liquid content of the aerosol-generation product according to the electrical parameter.

Specifically, the control unit obtains the liquid content of the aerosol-generation product according to the obtained electrical parameter, and controls a power output to the heating unit to heat the aerosol-generation product.

FIG. 8 is a schematic flowchart of a method for detecting a liquid content in an aerosol-generation product according to another embodiment of this application. A difference from the method shown in FIG. 5 lies in that before step S12 of electrically connecting first conductor to second conductor through the aerosol-generation product, the method further includes the following step:

- Step S11a: Collect an initial electrical parameter between the first conductor and the second conductor.

Specifically, an electrical signal loop cannot be formed between the first conductor and the second conductor due to the spaced arrangement. In this case, the sampling unit denotes an electrical parameter between the first conductor and the second conductor as the initial electrical parameter. The electrical parameter includes a capacitance value and/or a resistance value. The sampling unit denotes the capacitance sensing signal as C1 and the resistance signal as R1.

FIG. 9 is a schematic flowchart of an implementation of step S14 in FIG. 7 according to an embodiment of this application. Step S14 specifically includes the following steps:

- Step S141: Obtain a first difference between the electrical parameter and the initial electrical parameter.

The initial electrical parameter is an electrical parameter when the first conductor and the second conductor are not electrically connected by the aerosol-generation product. Specifically, the sampling unit collects the initial electrical parameter when the first conductor and the second conductor are not electrically connected and the electrical parameter after the first conductor and the second conductor are electrically connected, and sends the electrical parameters to the control unit. The control unit compares the initial electrical parameter collected by the sampling unit with the electrical parameter after the first conductor and the second conductor are electrically connected, and obtains the first difference between the two electrical parameters by algorithm filtering.

- Step S142: Compare the first difference with a preset threshold to obtain a second difference.

Specifically, the control unit compares the first difference with the preset threshold pre-stored in the control unit to obtain the second difference.

- Step S143: Obtain the liquid content of the aerosol-generation product according to the second difference.

Specifically, the liquid content of the aerosol-generation product is obtained according to the second difference by table look-up or calculation. The liquid content of the aerosol-generation product 10 found through table look-up according to the second difference is obtained by experiments and tests, and is pre-stored in the control unit.

In the method for detecting a liquid content in an aerosol-generation product provided in this application, the initial electrical parameter when the first conductor and the second conductor are not electrically connected is collected, the electrical parameter after the first conductor and the second conductor are electrically connected by the aerosol-generation product is obtained, and the two electrical parameters are compared, so that the liquid content in the aerosol-generation product can be obtained. The detection method is simple and has high reliability.