Electronic atomization device and radiation control method therefor

Abstract

Disclosed in the present invention are an electronic atomization device and a radiation control method therefor. The electronic atomization device comprises an antenna unit used for converting a radio frequency signal into a microwave signal and radiating the microwave signal to a load medium. The radiation control method comprises: acquiring a load temperature of a load medium, and determining a power control signal on the basis of the load temperature; and on the basis of the power control signal, controlling the power of a radio frequency signal inputted to an antenna unit, so as to control the microwave energy radiated by the antenna unit.

Description

Electronic atomization device and radiation control method thereof Technical Field

[0001] The present invention relates to the field of microwave atomization, and in particular to an electronic atomization device and a radiation control method thereof. Background Art

[0002] Atomization heating technology is rapidly evolving. With the advancement of science and technology, new technologies such as resistance heating, electromagnetic heating, and microwave heating have emerged in the field of electronic atomization heating. At the same time, electronic products, especially microwave-heated atomization products, emit electronic radiation. The high-frequency radiation from these products can interfere with other electronic products. Testing of microwave-heated electronic atomization products has revealed that, as the load medium undergoes microwave heating, microwave radiation (a type of electromagnetic wave) leaks over time, leading to excessive stray radiation. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide an electronic atomization device and a radiation control method thereof in response to the technical defect in the prior art that the electronic atomization device generates excessive high-frequency radiation stray during microwave heating.

[0004] The technical solution adopted by the present invention to solve the technical problem is to construct a radiation control method for an electronic atomization device, wherein the electronic atomization device includes an antenna unit for converting a radio frequency signal into a microwave signal and radiating the signal to a load medium. The radiation control method includes:

[0005] obtaining a load temperature of the load medium and determining a power control signal according to the load temperature;

[0006] The power of the radio frequency signal input to the antenna unit is controlled according to the power control signal to control the microwave energy radiated by the antenna unit.

[0007] Preferably, the electronic atomization device further comprises a radio frequency unit for generating a radio frequency signal, a power amplifier for amplifying the power of the radio frequency signal output by the radio frequency unit and outputting it to the antenna unit, and a voltage output unit for supplying power to the power amplifier;

[0008] The step of controlling the power of the radio frequency signal input to the antenna unit according to the power control signal includes:

[0009] controlling the power of the radio frequency signal input to the antenna unit by adjusting the output power of the radio frequency unit according to the power control signal; and / or,

[0010] The power of the radio frequency signal input to the antenna unit is controlled by adjusting the supply voltage output by the voltage output unit to the power amplifier according to the power control signal.

[0011] Preferably, the step of determining the power control signal according to the load temperature includes:

[0012] The difference between the preset temperature and the load temperature is calculated, and a power control signal is determined according to the difference, wherein the difference is positively correlated with the microwave energy radiated by the antenna unit under the corresponding power control signal.

[0013] Preferably, the step of determining the power control signal according to the difference comprises:

[0014] When the difference is greater than or equal to the first threshold, the preset first power control signal is used as the power control signal.

[0015] Preferably, the step of determining the power control signal according to the difference comprises:

[0016] When the difference is less than the first threshold and greater than or equal to the second threshold, a preset second power control signal is used as the power control signal, wherein the first threshold is greater than the second threshold, and the microwave energy radiated by the antenna unit under the second power control signal is less than the microwave energy radiated by the antenna unit under the first power control signal.

[0017] Preferably, the step of determining the power control signal according to the difference comprises:

[0018] When the difference is less than the second threshold, a preset third power control signal is used as the power control signal, wherein the microwave energy radiated by the antenna unit under the third power control signal is less than the microwave energy radiated by the antenna unit under the second power control signal.

[0019] Preferably, the first threshold is greater than or equal to 20 degrees, and the second threshold is greater than 0 degrees and less than or equal to 10 degrees.

[0020] Preferably, the step of obtaining the load temperature of the load medium includes:

[0021] The temperature of the antenna unit is obtained from a temperature measuring component provided on the antenna unit, and the temperature of the load medium is obtained according to the temperature of the antenna unit.

[0022] The present invention also constructs an electronic atomization device, comprising: a control component, an antenna unit for converting radio frequency signals into microwave signals and radiating them to the load medium, and the control component implements the steps of the radiation control method of the electronic atomization device described above when executing a computer program.

[0023] Preferably, it further comprises a temperature measuring component provided on the antenna unit, and the control component is further configured to obtain the temperature of the antenna unit from the temperature measuring component, and obtain the temperature of the load medium according to the temperature of the antenna unit.

[0024] Through the technical solution of the present invention, a power control signal can be determined based on the load temperature of the load medium, and the power of the radio frequency signal input to the antenna unit can be controlled based on the power control signal, thereby adjusting the amount of microwave energy radiated by the antenna unit. Therefore, during the process of heating the load medium, even if the load medium undergoes a phase change, it can still be ensured that the electromagnetic waves radiated by the antenna unit are not excessive, thereby avoiding radiation stray leakage. In this way, not only the absorption rate and atomization effect of the antenna unit are guaranteed, but also the use of surrounding electronic devices will not be interfered with. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without inventive efforts. In the drawings:

[0026] FIG1 is a flow chart of a first embodiment of a method for controlling radiation of an electronic atomization device according to the present invention;

[0027] FIG2 is a flow chart of an embodiment of step S10 in FIG1 ;

[0028] FIG3 is a logical structure diagram of the electronic atomization device according to the first embodiment of the present invention;

[0029] FIG4 is a graph showing the relationship between the load temperature and the power of the radio frequency signal according to the present invention. DETAILED DESCRIPTION

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0031] First, it should be noted that in an electronic atomizer device, microwave heating is performed by radiating microwave energy into the load medium (e.g., a cigarette). This heating method, due to the high radiated energy, instantly heats the load medium, thereby reducing energy consumption when the user is not drawing. However, when the electronic atomizer device first receives the heating start command, the load medium has a high resistivity and absorbs a large amount of microwave energy. As heating progresses, the resistivity of the load medium changes, i.e., a phase change occurs, causing self-excitation at frequencies outside the operating bandwidth. Consequently, the amount of microwave energy absorbed decreases compared to the initial level. If heating is continued at the same power, the radiated microwave energy cannot be fully absorbed by the load medium, resulting in microwave (a type of electromagnetic wave) radiation leakage, which can cause excessive stray radiation and interfere with the use of other electronic products.

[0032] In order to reduce the leakage of electromagnetic waves radiated by electronic atomization devices, the present invention proposes a radiation control method. In the working scenario of high-power microwave atomization products, the high-frequency radiation generated is dynamically adjusted according to the characteristics of the load medium to reduce radiation stray.

[0033] FIG1 is a flow chart of a first embodiment of a radiation control method for an electronic atomization device according to the present invention. First, it is explained that the electronic atomization device includes an antenna unit, and the load medium is located within the radiation range of the antenna unit. The antenna unit is used to convert a radio frequency signal into a microwave signal and radiate it to the load medium. Therefore, the load medium can be heated by radiating microwave energy to the load medium. The radiation control method of this embodiment includes:

[0034] Step S10, obtaining a load temperature of the load medium, and determining a power control signal according to the load temperature;

[0035] Step S20: Control the power of the radio frequency signal input to the antenna unit according to the power control signal, so as to control the microwave energy radiated by the antenna unit.

[0036] In the technical solution of this embodiment, since a power control signal can be determined based on the load temperature of the load medium, and the power of the radio frequency signal input to the antenna unit can be controlled based on the power control signal, thereby adjusting the amount of microwave energy radiated by the antenna unit, even if the load medium undergoes a phase change during the heating process of the load medium, it can still be ensured that the electromagnetic waves radiated by the antenna unit are not excessive, thereby avoiding radiation stray leakage. In this way, not only the absorption rate and atomization effect of the antenna unit are guaranteed, but also the use of surrounding electronic devices will not be interfered with.

[0037] Furthermore, in an optional embodiment, obtaining the load temperature of the load medium in step S10 includes obtaining the temperature of the antenna unit from a temperature measuring component provided on the antenna unit, and obtaining the temperature of the load medium based on the temperature of the antenna unit. In this embodiment, the temperature measuring component may be, for example, a thermocouple, which is used to detect the temperature of the antenna unit. Since the temperatures of the antenna unit and the load medium are positively correlated, the temperature of the antenna unit can be used to represent the temperature of the load medium. For example, the detected temperature of the antenna unit can be directly used as the temperature of the load medium.

[0038] Furthermore, in an optional embodiment, the electronic atomization device further includes a radio frequency unit, a power amplifier, and a voltage output unit, wherein the radio frequency unit is used to generate a radio frequency signal; the power amplifier is used to amplify the power of the radio frequency signal output by the radio frequency unit and output it to the antenna unit; and the voltage output unit is used to power the power amplifier. Moreover, step S20 includes:

[0039] controlling the power of the radio frequency signal input to the antenna unit by adjusting the output power of the radio frequency unit according to the power control signal; and / or,

[0040] The power of the radio frequency signal input to the antenna unit is controlled by adjusting the supply voltage output by the voltage output unit to the power amplifier according to the power control signal.

[0041] In a specific embodiment, the radio frequency unit is a radio frequency unit with adjustable power, and the output power of the radio frequency unit is adjusted according to the power control signal, thereby controlling the microwave energy radiated by the antenna unit.

[0042] In another specific embodiment, a power amplifier is arranged between the radio frequency unit and the antenna unit. Moreover, the power amplifier is a microwave amplifier tube, and its amplification factor is proportional to the supply voltage. Therefore, according to the power control signal, the supply voltage output by the voltage output unit to the power amplifier is adjusted to control the microwave energy radiated by the antenna unit.

[0043] Furthermore, in an optional embodiment, the step of determining a power control signal based on the load temperature in step S10 includes calculating a difference between a preset temperature and the load temperature, and determining a power control signal based on the difference, wherein the difference is positively correlated with the microwave energy radiated by the antenna unit under the corresponding power control signal. Alternatively, the preset temperature may be an optimal temperature point for microwave heating of the load medium. In this embodiment, the power control signal is determined by calculating the difference between the preset temperature and the load temperature. Furthermore, the greater the difference, the greater the microwave energy radiated by the antenna unit under the corresponding power control signal; conversely, the smaller the difference, the less microwave energy radiated by the antenna unit under the corresponding power control signal.

[0044] Furthermore, in an optional embodiment, the step of determining the power control signal according to the difference includes:

[0045] When the difference is greater than or equal to a first threshold, using a preset first power control signal as a power control signal; and / or,

[0046] When the difference is less than the first threshold and greater than or equal to a second threshold, a preset second power control signal is used as the power control signal, wherein the first threshold is greater than the second threshold, and the microwave energy radiated by the antenna unit under the second power control signal is less than the microwave energy radiated by the antenna unit under the first power control signal; and / or,

[0047] When the difference is less than the second threshold, a preset third power control signal is used as the power control signal, wherein the microwave energy radiated by the antenna unit under the third power control signal is less than the microwave energy radiated by the antenna unit under the second power control signal.

[0048] In one specific embodiment, two thresholds are pre-set: a first threshold and a second threshold, with the first threshold being greater than the second threshold. These two thresholds are used to divide the temperature into three ranges: greater than or equal to the first threshold; less than the first threshold and greater than or equal to the second threshold; and less than the second threshold. Furthermore, power control signals corresponding to each temperature range are pre-set: a first power control signal, a second power control signal, and a third power control signal. The relationship between the three power control signals is such that the microwave energy radiated by the antenna unit is the highest under the first power control signal, the second highest under the second power control signal, and the lowest under the third power control signal. The reasons are as follows: when the current difference is greater than or equal to the first threshold, the load temperature is far from reaching the preset temperature (optimal temperature point), the resistivity of the load medium is still good, and more microwave energy can be absorbed. Therefore, the first power control signal can be used to maximize the power of the RF signal input to the antenna unit, and the RF signal is converted into microwaves through the antenna unit and radiated out. The radiated microwaves are absorbed by the load medium in large quantities and converted into heat. At this time, there is basically little electromagnetic wave leakage, and almost all of it is absorbed by the load medium, so the load medium can quickly reach the optimal temperature point; when the current difference is less than the first threshold and greater than or equal to the second threshold, the resistivity of the load medium has changed compared to the initial time, and the absorbable microwave energy becomes less. Therefore, the second power control signal can be used to reduce the power of the RF signal input to the antenna unit, and the RF signal is converted into microwaves through the antenna unit and radiated out. The radiated microwaves are absorbed by the load medium and converted into heat Since the microwave energy radiated by the antenna unit is relatively small and just suitable for the load medium undergoing phase change, electromagnetic wave leakage is also essentially minimal at this time. Moreover, since the microwave energy absorbed by the load medium decreases, the temperature of the load medium further approaches the optimal temperature point. When the current difference is less than the second threshold, the resistivity of the load medium has significantly changed compared to the initial value, and the absorbable microwave energy has further decreased. Therefore, the power of the RF signal input to the antenna unit can be further reduced through the third power control signal. The RF signal is converted into microwaves by the antenna unit and radiated. The radiated microwaves are absorbed by the load medium and converted into heat. Since the microwave energy radiated by the antenna unit is minimal at this time, just suitable for the load medium undergoing phase change, electromagnetic wave leakage is also essentially minimal at this time. Moreover, since the microwave energy absorbed by the load medium further decreases, the temperature of the load medium further approaches the optimal temperature point.

[0049] FIG2 is a flow chart of an embodiment of step S10 in FIG1 . In this embodiment, the first threshold is greater than or equal to 20 degrees, the second threshold is greater than 0 degrees and less than or equal to 10 degrees, and the two thresholds are divided into three temperature ranges: the first temperature range is (0, 10] degrees, the second temperature range is (10, 20] degrees, and the third temperature range is greater than 20 degrees. Furthermore, step S10 includes:

[0050] Step S11, obtaining the current load temperature of the load medium, calculating the current difference between the preset temperature and the current load temperature, and determining whether the current temperature range corresponding to the current difference is the first temperature range, the second temperature range, or the third temperature range. If it is within the first temperature range, executing step S16; if it is within the second temperature range, executing step S14; if it is within the third temperature range, executing step S12;

[0051] Step S12, using the first power control signal as the current power control signal;

[0052] Step S13, obtaining the current load temperature of the load medium, calculating the current difference between the preset temperature and the current load temperature, and determining whether the current temperature range corresponding to the current difference is the second temperature range or the third temperature range. If it is within the second temperature range, executing step S14; if it is within the third temperature range, executing step S12;

[0053] Step S14: using a second power control signal as a current power control signal, wherein the microwave energy radiated by the antenna unit under the second power control signal is less than the microwave energy radiated by the antenna unit under the first power control signal;

[0054] Step S15, obtaining the current load temperature of the load medium, calculating the current difference between the preset temperature and the current load temperature, and determining whether the current temperature range corresponding to the current difference is the first temperature range or the second temperature range. If it is within the first temperature range, executing step S16; if it is within the second temperature range, executing step S14;

[0055] Step S16: Use the third power control signal as the current power control signal, wherein the microwave energy radiated by the antenna unit under the third power control signal is less than the microwave energy radiated by the antenna unit under the second power control signal, and then execute step S13.

[0056] In this embodiment, the following three temperature ranges are set: (0, 10], (10, 20], (20, +∞). It should be understood that in actual applications, the maximum difference between the preset temperature and the load temperature occurs when the heating is just started. Therefore, the third temperature range can also be a temperature interval from 20 to a certain fixed temperature. In addition, the above three temperature ranges respectively correspond to: the third power control signal (corresponding to the first temperature range (0, 10]), the second power control signal (corresponding to the second temperature range (10, 20]), and the first power control signal (corresponding to the third temperature range (20, +∞)).

[0057] Finally, it should be noted that step S11 occurs in the temperature detection, calculation and judgment performed at the beginning of the heating (for example, the first time), so there may be three judgment results: the first temperature range, the second temperature range, and the third temperature range; step S13 occurs in the temperature detection, calculation and judgment performed after the first power control signal is used for control, so there may only be two judgment results: the second temperature range and the third temperature range; step S15 occurs in the temperature detection, calculation and judgment performed after the second power control signal is used for control, so there may only be two judgment results: the first temperature range and the second temperature range.

[0058] FIG3 is a logical structure diagram of a first embodiment of an electronic atomization device according to the present invention. The electronic atomization device of this embodiment includes an antenna unit 10, a control component 20, and a load medium 30. The antenna unit 10 is configured to convert radio frequency signals into microwave signals and radiate the signals toward the load medium 30. The control component 20 implements the steps of the radiation control method for the electronic atomization device described above when executing a computer program.

[0059] Furthermore, as shown in Figure 3, the electronic atomization device also includes a radio frequency unit 40, a power amplifier 50 and a voltage output unit 60. The radio frequency unit 40 is used to generate a radio frequency signal; the power amplifier 50 is used to power amplify the radio frequency signal output by the radio frequency unit 40; and the voltage output unit 60 is used to output a power supply voltage to the power amplifier 50 to ensure that the power amplifier 50 operates normally.

[0060] In a specific embodiment, the voltage output unit 60 includes a power management chip, and the control component 20 can adjust the supply voltage output by the voltage output unit 60 by controlling the power management chip.

[0061] Furthermore, in an optional embodiment, the electronic atomization device further includes a temperature measuring component provided on the antenna unit, and the control component is further configured to obtain the temperature of the antenna unit from the temperature measuring component, and to obtain the temperature of the load medium based on the temperature of the antenna unit. In this embodiment, the temperature measuring component may be, for example, a thermocouple, which is configured to detect the temperature of the antenna unit. Since the temperature of the antenna unit and the temperature of the load medium are positively correlated, the temperature of the antenna unit can be used to characterize the temperature of the load medium. For example, the detected temperature of the antenna unit can be directly used as the temperature of the load medium.

[0062] In one specific embodiment, referring to the relationship between load temperature and RF signal power shown in FIG4 , curve L1 represents the load temperature curve of the load medium, and curve L2 represents the power curve of the RF signal input to the antenna unit. When heating begins, i.e., during the period 0-t1, the load medium's temperature is relatively low, and the difference from the preset temperature is large (greater than a first threshold). At this time, the control component outputs a first power control signal to microwave-heat the load medium at the highest power, rapidly heating the load medium. When the user takes a puff, for example, during the period t1-t2, the load medium begins to cool due to the introduction of cool air, and the difference from the preset temperature falls between the first and second thresholds. At this time, the control component outputs a second power control signal to microwave-heat the load medium at a power between the highest and lowest powers. When the user is not taking a puff, i.e., between puffs, for example, during the period t2-t3, the load medium's temperature changes little, and the difference from the preset temperature is less than the second threshold. At this time, the control component outputs a third power control signal to microwave-heat the load medium at the lowest power.

[0063] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of the claims.

Claims

1. A radiation control method for an electronic atomization device, wherein the electronic atomization device includes an antenna unit for converting a radio frequency signal into a microwave signal and radiating the signal to a load medium, characterized in that: The radiation control method comprises: obtaining a load temperature of the load medium and determining a power control signal according to the load temperature; The power of the radio frequency signal input to the antenna unit is controlled according to the power control signal to control the microwave energy radiated by the antenna unit.

2. The radiation control method according to claim 1, characterized in that: The electronic atomization device further includes a radio frequency unit for generating a radio frequency signal, a power amplifier for amplifying the power of the radio frequency signal output by the radio frequency unit and outputting the power to the antenna unit, and a voltage output unit for supplying power to the power amplifier; The step of controlling the power of the radio frequency signal input to the antenna unit according to the power control signal includes: controlling the power of the radio frequency signal input to the antenna unit by adjusting the output power of the radio frequency unit according to the power control signal; and / or, The power of the radio frequency signal input to the antenna unit is controlled by adjusting the supply voltage output by the voltage output unit to the power amplifier according to the power control signal.

3. The radiation control method according to claim 1 or 2, characterized in that: The step of determining the power control signal according to the load temperature includes: The difference between the preset temperature and the load temperature is calculated, and a power control signal is determined according to the difference, wherein the difference is positively correlated with the microwave energy radiated by the antenna unit under the corresponding power control signal.

4. The radiation control method according to claim 3, characterized in that: The step of determining a power control signal according to the difference comprises: When the difference is greater than or equal to the first threshold, the preset first power control signal is used as the power control signal.

5. The radiation control method according to claim 4, characterized in that: The step of determining a power control signal according to the difference comprises: When the difference is less than the first threshold and greater than or equal to the second threshold, a preset second power control signal is used as the power control signal, wherein the first threshold is greater than or equal to the second threshold, and the microwave energy radiated by the antenna unit under the second power control signal is less than the microwave energy radiated by the antenna unit under the first power control signal.

6. The radiation control method according to claim 5, characterized in that: The step of determining a power control signal according to the difference comprises: When the difference is less than the second threshold, a preset third power control signal is used as the power control signal, wherein the microwave energy radiated by the antenna unit under the third power control signal is less than the microwave energy radiated by the antenna unit under the second power control signal.

7. The radiation control method according to claim 6, characterized in that: The first threshold is greater than or equal to 20 degrees, and the second threshold is greater than 0 degrees and less than or equal to 10 degrees.

8. The radiation control method according to claim 1, wherein: The step of obtaining the load temperature of the load medium includes: The temperature of the antenna unit is obtained from a temperature measuring component provided on the antenna unit, and the temperature of the load medium is obtained according to the temperature of the antenna unit.

9. An electronic atomization device comprising: A control component, an antenna unit for converting a radio frequency signal into a microwave signal and radiating it to the load medium, characterized in that the control component implements the steps of the radiation control method of the electronic atomization device according to any one of claims 1 to 8 when executing a computer program.

10. The electronic atomization device according to claim 9, characterized in that: It also includes a temperature measuring component arranged on the antenna unit, and the control component is further used to obtain the temperature of the antenna unit from the temperature measuring component, and obtain the temperature of the load medium according to the temperature of the antenna unit.

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