WO2024045050A1

WO2024045050A1 - Heat-not-burn device and heating control method therefor, program product, and storage medium

Info

Publication number: WO2024045050A1
Application number: PCT/CN2022/116231
Authority: WO
Inventors: 尹坤任; 张飞豹; 梁峰
Original assignee: 深圳麦时科技有限公司
Priority date: 2022-08-31
Filing date: 2022-08-31
Publication date: 2024-03-07

Abstract

A heat-not-burn device and a heating control method therefor, a program product, and a storage medium. The heating control method comprises: when heating a tobacco medium by using a microwave mode, measuring the frequency of a microwave signal in real time, and determining, according to the frequency measured in real time, a corresponding initial time point of when the tobacco medium reaches a specific temperature (S10); determining the required energy of the tobacco medium, starting from the initial time point, according to the specific temperature and a preset target temperature (S20); and controlling the output power and/or output time of a microwave source unit according to the required energy, such that the temperature of the tobacco medium reaches the target temperature (S30).

Description

Heat-not-burn device and heating control method, program product, and storage medium

Technical field

The invention relates to the field of atomization equipment, and in particular to a heat-not-burn device and its heating control method, program product, and storage medium.

Background technique

HNB (Heat Not Burning) appliances can use microwaves to heat tobacco media. In order to achieve accurate temperature measurement, a bulge is often formed on the top of the appliance, and temperature measurement devices such as thermistors are placed in the bulge. When the HNB device is working, if the user inserts the tobacco medium, the raised part will be inserted into the tobacco medium accordingly, thereby realizing the temperature measurement of the tobacco medium. However, the existing solution will cause contamination of the raised portion during the heating process of the tobacco medium, which requires regular cleaning, causing inconvenience to the user. In addition, the user may use excessive force when cleaning, causing damage to the raised portion.

technical problem

The technical problem to be solved by the present invention is that the existing technology has the defect that the protrusions need to be cleaned regularly.

Technical solutions

The technical solution adopted by the present invention to solve the technical problem is to construct a heating control method for a heat-not-burn device, including:

When using microwave heating to heat the tobacco medium, detect the frequency of the microwave signal in real time, and determine the initial time point corresponding to when the tobacco medium reaches a specific temperature based on the frequency detected in real time;

Determine the required energy of the tobacco medium starting from the initial time point according to the specific temperature and the preset target temperature;

The output power and/or output time of the microwave source unit are controlled according to the required energy, so that the temperature of the tobacco medium reaches the target temperature.

Preferably, it also includes:

In the process when the temperature of the tobacco medium reaches the target temperature, calculate the output energy of the microwave unit from the initial time point to the current time point according to the real-time output power and output time of the microwave source unit;

Determine the temperature of the tobacco medium at the current point in time according to the output energy and the specific temperature;

Determine whether the calculated temperature at the current time point is consistent with the set temperature at the current time point in the preset temperature curve;

When inconsistent, adjust the output power and/or output time of the microwave source unit.

Preferably, determining the temperature of the tobacco medium at the current point in time includes:

Use formula calculation to determine the temperature of the tobacco medium at the current point in time; or,

The temperature of the tobacco medium at the current time point is determined by using a table lookup method.

Preferably, when inconsistent, adjusting the output power and/or output time of the microwave source unit includes:

Compare the calculated temperature at the current time point with the set temperature at the current time point in the preset temperature curve;

If the calculated temperature at the current time point is greater than the set temperature, control the microwave source unit to reduce the output power and/or reduce the output time;

If the calculated temperature at the current time point is less than the set temperature, the microwave source unit is controlled to increase the output power.

Preferably, the initial time point corresponding to when the tobacco medium reaches a specific temperature is determined based on the frequency of real-time detection, including:

Determine the inflection point frequency according to the real-time detected frequency, and use the time point corresponding to the inflection point frequency as the initial time point;

The temperature of the tobacco medium at the initial point in time is determined as the specific temperature.

Preferably, the inflection point frequency is determined based on the real-time detected frequency, including:

The maximum frequency among the real-time detected frequencies is used as the inflection point frequency.

The present invention also constructs a program product, including a processor, which implements the above-described steps of the heating control method of the heat-not-burn device when executing the stored computer program.

The present invention also constructs a storage medium that stores a computer program, which when executed by a processor implements the steps of the heating control method of the heat-not-burn device described above.

The invention also constructs a heat-not-burn device, which includes a microwave source unit and a tobacco medium, and also includes:

The first determination module is used to detect the frequency of the microwave signal in real time when the tobacco medium is heated by microwave heating, and determine the initial time point corresponding to when the tobacco medium reaches a specific temperature based on the real-time detected frequency;

a second determination module, configured to determine the required energy of the tobacco medium starting from the initial time point according to the specific temperature and the preset target temperature;

A control module configured to control the output power and/or output time of the microwave source unit according to the required energy, so that the temperature of the tobacco medium reaches the target temperature.

Preferably, it also includes:

A calculation module configured to calculate the microwave unit from the initial time point to the current time point according to the real-time output power and output time of the microwave source unit during the process when the temperature of the tobacco medium reaches the target temperature. the output energy;

A third determination module, configured to determine the temperature of the tobacco medium at the current point in time according to the output energy and the specific temperature;

A judgment module used to judge whether the calculated temperature at the current time point is consistent with the set temperature at the current time point in the preset temperature curve;

An adjustment module is used to adjust the output power and/or output time of the microwave source unit when there is inconsistency.

Preferably, it also includes: a circulator, a radiation unit, a forward coupler, a reverse coupler, a forward detection unit, and a reverse detection unit, wherein the output end of the microwave source unit is connected to the first end of the circulator. end, the second end of the circulator is connected to the radiating unit, and the tobacco medium is located within the radiation range of the radiating unit, and the first end of the forward coupler and the reverse coupler are respectively connected. The third end of the circulator, the second end of the forward coupler are connected to the input end of the forward detection unit, and the second end of the reverse coupler is connected to the input end of the reverse detection unit. , the output end of the forward detection unit and the output end of the reverse detection unit are respectively connected to the first determination module.

beneficial effects

Implementing the technical solution of the present invention, since the initial time point corresponding to when the tobacco medium reaches a specific temperature can be determined based on the frequency of real-time detection, that is, the temperature (specific temperature) of the tobacco medium at the initial time point is detected, therefore, at When measuring the temperature of tobacco media, it is no longer necessary to install a thermistor and other temperature measuring devices in the heat-not-burn device, and there is no need to set a protrusion on the heat-not-burn device to accommodate the thermal temperature measurement device. This saves the user the work of regularly cleaning the raised parts, which not only improves the user experience, but also avoids damage to the raised parts caused by cleaning.

Description of drawings

The present invention will be further described below in conjunction with the accompanying drawings and examples. In the accompanying drawings:

Figure 1 is a flow chart of Embodiment 1 of the heating control method of the heat-not-burn device of the present invention;

Figure 2 is a schematic diagram of the calculated temperature curve and the measured temperature curve;

Figure 3 is a logical structure diagram of Embodiment 1 of the heat-not-burn device of the present invention;

Figure 4 is a logical structure diagram of the second embodiment of the heat-not-burn device of the present invention.

Embodiments of the invention

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.

Figure 1 is a flow chart of a heating control method of a heating-not-burning device according to the present invention. The heating control method of this embodiment includes the following steps:

Step S10, when using microwave heating to heat the tobacco medium, detect the frequency of the microwave signal in real time, and determine the initial time point corresponding to when the tobacco medium reaches a specific temperature based on the frequency detected in real time;

Step S20, determine the required energy of the tobacco medium from the initial time point based on the specific temperature and the preset target temperature (for example, 225°C);

Step S30: Control the output power and/or output time of the microwave source unit according to the required energy, so that the temperature of the tobacco medium reaches the target temperature.

Regarding this embodiment, it should be noted that in an environment where the tobacco medium is heated by microwave, as the temperature of the tobacco medium rises (for example, starting from room temperature), the dielectric constant of the tobacco medium will change, and the dielectric constant of the tobacco medium will change. The real part of the constant is the true dielectric constant, which further affects the wavelength of the electromagnetic wave. And because the wavelength of electromagnetic waves is inversely proportional to frequency, changes in the real part of the dielectric constant will affect changes in the frequency of the microwave signal. For a certain heat-not-burn device, the tobacco medium installed in it is determined and has a unique specific temperature. This specific temperature corresponds to a unique microwave signal frequency. Therefore, the tobacco medium can be determined by detecting the frequency of the microwave signal in real time. A time point at a specific temperature (initial time point). After the specific temperature of the tobacco medium is determined, the energy that needs to be provided to the tobacco medium from the initial time point (demand energy) can be determined in combination with the target temperature. Finally, the output power and/or the microwave source unit can be controlled based on the demand energy. The time is output to allow the temperature of the tobacco medium to reach the target temperature.

In this embodiment, since the initial time point corresponding to when the tobacco medium reaches a specific temperature can be determined based on the frequency of real-time detection, that is, the temperature (specific temperature) of the tobacco medium at the initial time point is detected, so when When measuring the temperature of tobacco media, it is no longer necessary to install a thermistor and other temperature measuring devices in the heat-not-burn device, and there is no need to set a protrusion on the heat-not-burn device to accommodate the thermal temperature measurement device. This For users, the work of regularly cleaning the raised parts can be omitted, which not only improves the user experience, but also avoids damage to the raised parts caused by cleaning.

Further, in an optional embodiment, the heating control method of the present invention also includes:

In this embodiment, in the process from the initial time point (the time point when the tobacco medium reaches a specific temperature) to the time when the tobacco medium reaches the target temperature, it can also be deduced periodically or irregularly based on the energy that has been output (output energy). The temperature of the tobacco medium at the current time point, specifically: since the output power and output time in the period from the initial time point to the current time point are determined, the output energy that has been output can be calculated based on the output power and output time. The output energy is related to the temperature difference in the period from the initial time point to the current time point. Therefore, the temperature at the current time point can be calculated based on the output energy and the specific temperature. Then, the calculated temperature is compared with the set temperature at the corresponding time point in the temperature curve. If the two are inconsistent, the output of the microwave source unit can be adjusted to make the actual calculated temperature of the tobacco medium consistent with the temperature curve. This ensures the suction taste and aerosol quality. Moreover, this embodiment implements temperature measurement of the tobacco medium through software calculation. After testing, the accuracy is relatively high. As shown in Figure 2, curve L1 is the temperature curve calculated using the temperature measurement method of this embodiment. Curve L2 is the measured temperature curve.

Further, the temperature of the tobacco medium at the current time point can be determined by the following methods: 1. Using formula calculation; 2. Using table lookup. In this embodiment, the relationship formula between energy and temperature or the relationship table between energy and temperature difference (the difference between the temperature at the current time point and a specific temperature) can be stored in advance. After the energy that has been output is calculated, the relationship between energy and temperature can be calculated. The temperature relationship formula is used to calculate the temperature at the current time point, or the temperature at the current time point is obtained by looking up the relationship table between energy and temperature difference.

Further, when inconsistent, adjusting the output power and/or output time of the microwave source unit may specifically include:

In this embodiment, when the calculated temperature at the current time point is compared with the set temperature at the current time point in the preset temperature curve, the following three comparison results may occur: 1. The calculated temperature is greater than the set temperature. If the calculated temperature is less than the set temperature, it means that the actual temperature of the tobacco medium is too high. In this case, the output power of the microwave source unit can be reduced and/or the output time can be reduced. 2. The calculated temperature is less than the set temperature, which means that the actual temperature of the tobacco medium is too low. In this case, The output power of the microwave source unit can be increased; 3. The calculated temperature is equal to the set temperature, indicating that the actual temperature of the tobacco medium is just right, and there is no need to adjust the output power and/or output time.

Further, in an optional embodiment, in step S10, the initial time point corresponding to when the tobacco medium reaches a specific temperature is determined according to the frequency of real-time detection, including:

Further, the inflection point frequency can be determined according to the following method: the largest frequency among the frequencies detected in real time is used as the inflection point frequency. It should be noted here that after performing frequency tracking detection, the multiple detected frequencies can be sorted to find the maximum value among them, which is the inflection point frequency; the multiple detected frequencies can also be sorted by time. When a frequency curve is made, it is obviously a parabola with an opening downward, and the maximum value of the parabola is the inflection point frequency.

In this embodiment, in an environment where the tobacco medium is heated by microwave, as shown in Table 1, as the temperature of the tobacco medium rises, the real part of the dielectric constant of the tobacco medium will first gradually increase and then gradually decrease, while the medium The real part of the electrical constant will affect the wavelength of the electromagnetic wave, and the wavelength of the electromagnetic wave is inversely proportional to the frequency, so the change of the real part of the dielectric constant will affect the change of the frequency of the microwave signal, and the inflection point of the frequency corresponds to the real dielectric constant of the tobacco medium. The inflection point of the partial change, that is, 3.85, is then determined to be the temperature (specific temperature) corresponding to the inflection point of the real part change of the dielectric constant as 100°C. Therefore, the temperature at the moment when the frequency inflection point occurs can be determined as the specific temperature.

Table 1

Figure 3 is a logical structure diagram of Embodiment 1 of the heat-not-burn device of the present invention. The heat-not-burn device of this embodiment includes a main control unit 10, a microwave source unit 20, and a tobacco medium 30. The microwave source unit 20 may include: A microwave signal source that generates microwave signals, and a power amplifier for power amplifying the generated microwave signals. The tobacco medium 30 may be housed in a heating cavity within the radiation range of the microwave signal. The main control unit 10 includes a first determination module 11, a second determination module 12 and a control module 13. Furthermore, the first determination module 11 is used to detect the frequency of the microwave signal in real time when the tobacco medium 30 is heated using microwave heating. And determine the initial time point corresponding to when the tobacco medium 30 reaches a specific temperature according to the frequency of real-time detection; the second determination module 12 is used to determine the starting point of the tobacco medium 30 from the specific temperature and the preset target temperature. The required energy starting from the initial time point; the control module 13 is configured to control the output power and/or output time of the microwave source unit 20 according to the required energy, so that the temperature of the tobacco medium 30 reaches the target temperature.

Furthermore, the main control unit 10 may further include: a calculation module, a third determination module, a judgment module and an adjustment module, and the calculation module is configured to determine the temperature of the tobacco medium according to the target temperature when the temperature of the tobacco medium reaches the target temperature. The real-time output power and output time of the microwave source unit are used to calculate the output energy of the microwave unit from the initial time point to the current time point; the third determination module is used to determine the output energy and the specific temperature according to the output energy and the specific temperature. The temperature of the tobacco medium at the current time point; the judgment module is used to judge whether the calculated temperature at the current time point is consistent with the set temperature at the current time point in the preset temperature curve; the adjustment module is used to adjust the temperature when it is inconsistent. The output power and/or output time of the microwave source unit.

It should be understood that for the first determination module 11, the second determination module 12, the control module 13, the calculation module, the third determination module, the judgment module and the adjustment module, these modules can be integrated into the main control unit 10, or they can be implemented by multiple implemented as an independent module.

Figure 4 is a logical structure diagram of the second embodiment of the heat-not-burn device of the present invention. The heat-not-burn device of this embodiment includes a main control unit 10, a microwave source unit 20, a tobacco medium, and also includes: a circulator 40 and a radiation unit 50 , forward coupler 61, reverse coupler 62, forward detection unit 71, reverse detection unit 72, wherein the output end of the microwave source unit 20 is connected to the first end of the circulator 40, and the second end of the circulator 40 The radiation unit 50 is connected, and the tobacco medium is located within the radiation range of the radiation unit 50. The first ends of the forward coupler 61 and the reverse coupler 62 are respectively connected to the third end of the circulator 40, and the second end of the forward coupler 61 is connected to the radiation unit 50. The terminal is connected to the input terminal of the forward detection unit 71, the second terminal of the reverse coupler 62 is connected to the input terminal of the reverse detection unit 72, and the output terminal of the forward detection unit 71 and the output terminal of the reverse detection unit 72 are respectively controlled. The first determination module in the unit 10 and the control module in the main control unit 10 are connected to the input end of the microwave source unit 20 .

In this embodiment, the microwave source unit 20 outputs a corresponding microwave signal under the control of the main control unit 10. The microwave signal is transmitted to the radiation unit 50 after passing through the circulator 40. The radiation unit 50 starts to radiate the microwave signal while heating the cavity. Since the tobacco medium in the tobacco medium is within the radiation range of the radiation unit 50, it can generate heat. At the same time, the temperature of the tobacco medium will cause changes in the real part of the dielectric constant of the tobacco medium, which in turn affects changes in the frequency of the microwave signal. When performing frequency following detection, the forward detection unit 71 and the reverse detection unit 72 collect the voltage of the microwave signal through the corresponding forward coupler 61 and reverse coupler 62 respectively, and send it to the first signal in the main control unit 10 Determine the module. The first determination module can determine the frequency of the microwave signal by analyzing the voltage of the collected microwave signal, and then determine the inflection point frequency, and then use the time point when the inflection point frequency occurs as the initial time point, and the initial time point The temperature is the specific temperature (when the tobacco medium is determined, its corresponding specific temperature is also determined).

The present invention also constructs a program product, which includes a processor that implements the above-described steps of the heating control method of the heat-not-burn device when executing the stored computer program.

It should be understood that in the embodiment of the present application, the processor may be a central processing unit (Central Processing Unit, CPU), or other general-purpose processor, digital signal processor (Digital Signal Processor, DSP), application specific integrated circuit (Application Specific Integrated Circuit, ASIC), off-the-shelf programmable gate array (Field-Programmable Gate Array, FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. Among them, the general processor can be a microprocessor or any conventional processor.

Moreover, since the processor can implement the steps of the heating control method of any heat-not-burn device provided by the embodiments of the present invention when executing the computer program, any heat-not-burn device provided by the embodiments of the present invention can be implemented. The beneficial effects that can be achieved by the heating control method of the device are detailed in the previous embodiments and will not be described again here.

The present invention also constructs a storage medium, which stores a computer program. When executed by a processor, the computer program implements the above-described steps of the heating control method of the heat-not-burn device.

It should be understood that the storage medium may include: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), magnetic disk or optical disk and other various computer storage media that can store program codes. Moreover, since the computer program stored in the storage medium can implement the steps of the heating control method of any heat-not-burn device provided by the embodiments of the present invention when executed, it is possible to implement the steps provided by the embodiments of the present invention. The beneficial effects that can be achieved by any heating control method of the heat-not-burn device are detailed in the previous embodiments and will not be described again here.

The above descriptions are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the scope of the claims of the present invention.

Claims

A heating control method for a heat-not-burn device, characterized by including:

When using microwave heating to heat the tobacco medium, detect the frequency of the microwave signal in real time, and determine the initial time point corresponding to when the tobacco medium reaches a specific temperature based on the frequency detected in real time;

Determine the required energy of the tobacco medium starting from the initial time point according to the specific temperature and the preset target temperature;

The output power and/or output time of the microwave source unit are controlled according to the required energy, so that the temperature of the tobacco medium reaches the target temperature.
The heating control method of the heat-not-burn device according to claim 1, further comprising:

In the process when the temperature of the tobacco medium reaches the target temperature, calculate the output energy of the microwave unit from the initial time point to the current time point according to the real-time output power and output time of the microwave source unit;

Determine the temperature of the tobacco medium at the current point in time according to the output energy and the specific temperature;

Determine whether the calculated temperature at the current time point is consistent with the set temperature at the current time point in the preset temperature curve;

When inconsistent, adjust the output power and/or output time of the microwave source unit.
The heating control method of a heat-not-burn device according to claim 2, wherein determining the temperature of the tobacco medium at the current point in time includes:

Use formula calculation to determine the temperature of the tobacco medium at the current point in time; or,

The temperature of the tobacco medium at the current time point is determined by using a table lookup method.
The heating control method of a heat-not-burn device according to claim 2, characterized in that when there is inconsistency, adjusting the output power and/or output time of the microwave source unit includes:

Compare the calculated temperature at the current time point with the set temperature at the current time point in the preset temperature curve;

If the calculated temperature at the current time point is greater than the set temperature, control the microwave source unit to reduce the output power and/or reduce the output time;

If the calculated temperature at the current time point is less than the set temperature, the microwave source unit is controlled to increase the output power.
The heating control method of the heat-not-burn device according to claim 1, wherein the initial time point corresponding to when the tobacco medium reaches a specific temperature is determined according to the frequency of real-time detection, including:

Determine the inflection point frequency according to the real-time detected frequency, and use the time point corresponding to the inflection point frequency as the initial time point;

The temperature of the tobacco medium at the initial point in time is determined as the specific temperature.
The heating control method of a heat-not-burn device according to claim 5, characterized in that the inflection point frequency is determined based on the frequency detected in real time, including:

The maximum frequency among the real-time detected frequencies is used as the inflection point frequency.
A program product includes a processor, characterized in that the processor implements the steps of the heating control method of the heat-not-burn device according to any one of claims 1 to 6 when executing the stored computer program.
A storage medium storing a computer program, characterized in that when the computer program is executed by a processor, the steps of the heating control method of the heat-not-burn device described in any one of claims 1-6 are implemented.
A heat-not-burn device includes a microwave source unit and tobacco medium, and is characterized in that it also includes:

The first determination module is used to detect the frequency of the microwave signal in real time when the tobacco medium is heated by microwave heating, and determine the initial time point corresponding to when the tobacco medium reaches a specific temperature based on the real-time detected frequency;

a second determination module, configured to determine the required energy of the tobacco medium starting from the initial time point according to the specific temperature and the preset target temperature;

A control module configured to control the output power and/or output time of the microwave source unit according to the required energy, so that the temperature of the tobacco medium reaches the target temperature.
The heat-not-burn device according to claim 9, further comprising:

A calculation module configured to calculate the microwave unit from the initial time point to the current time point according to the real-time output power and output time of the microwave source unit during the process when the temperature of the tobacco medium reaches the target temperature. the output energy;

A third determination module, configured to determine the temperature of the tobacco medium at the current point in time according to the output energy and the specific temperature;

A judgment module used to judge whether the calculated temperature at the current time point is consistent with the set temperature at the current time point in the preset temperature curve;

An adjustment module is used to adjust the output power and/or output time of the microwave source unit when there is inconsistency.
The heat-not-burn device according to claim 9, further comprising: a circulator, a radiation unit, a forward coupler, a reverse coupler, a forward detection unit, and a reverse detection unit, wherein the microwave The output end of the source unit is connected to the first end of the circulator, the second end of the circulator is connected to the radiation unit, and the tobacco medium is located within the radiation range of the radiation unit, and the forward coupler The first end of the reverse coupler is connected to the third end of the circulator respectively, the second end of the forward coupler is connected to the input end of the forward detection unit, and the reverse coupler's The second end is connected to the input end of the reverse detection unit, and the output end of the forward detection unit and the output end of the reverse detection unit are respectively connected to the first determination module.