A heating-not-burning device and a temperature control method and system thereof

Abstract

The present invention relates to the field of electronic heating technology, and specifically to a heating-without-combustion device and its temperature control method and system. The method of the present application obtains the first resistivity temperature coefficient of the heating element in the first heating stage and the second resistivity temperature coefficient in the second heating stage respectively; within the first preset time period, the resistance value of the heating element is obtained, and the temperature of the heating element at the current stage is calculated according to the resistance value of the heating element and the first resistivity temperature coefficient, and then the heating of the aerosol-generating substrate by the heating element is controlled according to the temperature; when entering the second preset time period, the resistance value of the current heating element is obtained, and the current temperature of the heating element is calculated according to the resistance value of the current heating element and the second resistivity temperature coefficient, and the heating of the aerosol-generating substrate by the heating element is controlled according to the current temperature. By controlling the temperature of the heating element at different stages, precise heating and temperature control of the aerosol-generating substrate at different stages can be achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of electronic heating, and in particular to a heating-without-burning device and a temperature control method and system thereof. Background Art

[0002] When the existing heating-not-burning appliances are in use, the aerosol-generating matrix is ​​heated by the heating element. Generally, a fixed TCR value (temperature coefficient of resistivity) is used for temperature control during the heating process. However, as the heating time increases, the components around the heating element will also have a certain impact on the heating temperature of the heating element, which leads to a large temperature difference in the heat output by the heating element during the entire heating stage, thereby causing the TCR to change. Based on this, the accuracy of the temperature control of the appliance in a certain working period will eventually be reduced. Summary of the invention

[0003] The invention provides a heating without burning appliance and a temperature control method and system thereof, which effectively solve the problem of low temperature control accuracy of the existing heating without burning appliance during the heating process.

[0004] According to a first aspect, an embodiment provides a temperature control method for a heating-not-burning appliance, comprising:

[0005] respectively obtaining a first temperature coefficient of resistivity and a second temperature coefficient of resistivity of the heating element;

[0006] In the process of heating the aerosol generating substrate by the heating element, within a first preset time period, the resistance value of the heating element is obtained, the temperature of the heating element is calculated according to the resistance value of the heating element and the first resistivity temperature coefficient, and the heating of the aerosol generating substrate by the heating element is controlled according to the temperature of the heating element;

[0007] In the process of the heating element heating the aerosol generating substrate, within a second preset time period, the resistance value of the heating element is obtained, the temperature of the heating element is calculated based on the resistance value of the heating element and the second resistivity temperature coefficient, and the heating of the aerosol generating substrate by the heating element is controlled based on the temperature of the heating element.

[0008] In an achievable implementation, before respectively acquiring the first temperature coefficient of resistivity and the second temperature coefficient of resistivity of the heating element, the method further includes:

[0009] The heating element is calibrated to respectively calculate a first temperature coefficient of resistivity and a second temperature coefficient of resistivity of the heating element, wherein the first temperature coefficient of resistivity and the second temperature coefficient of resistivity are different.

[0010] In an achievable implementation, the calibrating the heating element to respectively calculate the first temperature coefficient of resistivity and the second temperature coefficient of resistivity of the heating element comprises:

[0011] Controlling the heating element to heat to a preset temperature, and obtaining a first initial resistance value, a first end point resistance value, a first initial temperature, and a first end point temperature of the heating element in the first preset time period;

[0012] Calculate a first resistivity temperature coefficient of the heating element according to the first initial resistance, the first endpoint resistance, the first initial temperature and the first endpoint temperature;

[0013] Obtaining a second initial resistance value, a second end point resistance value, a second initial temperature and a preset temperature of the heating element in the second preset time period;

[0014] The second resistivity temperature coefficient of the heating element is calculated according to the second initial resistance, the second endpoint resistance, the second initial temperature and the preset temperature.

[0015] In an achievable implementation, the first preset time period and the second preset time period are connected; the first endpoint resistance value and the second initial resistance value are the same, and the first endpoint temperature and the second initial temperature are the same.

[0016] In an achievable implementation, the calculation formula for the first temperature coefficient of resistivity is:

[0017]

[0018] Where TCR1 is the first resistivity temperature coefficient, R 11 is the first initial resistance, R 12 is the first end point resistance, T 11 is the first initial temperature, T 12 is the first endpoint temperature;

[0019] The calculation formula of the second resistivity temperature coefficient is:

[0020]

[0021] Where TCR2 is the second resistivity temperature coefficient, R 21 is the second initial resistance, R 22 is the second end point resistance, T 21 is the second initial temperature, T 22 is the preset temperature.

[0022] In an achievable implementation manner, after calibrating the heating element to respectively calculate the first temperature coefficient of resistivity and the second temperature coefficient of resistivity of the heating element, the method further includes:

[0023] The first temperature coefficient of resistivity and the second temperature coefficient of resistivity are saved.

[0024] According to a second aspect, an embodiment provides a temperature control system for a heating-not-burning appliance, comprising:

[0025] An acquisition module, used to respectively acquire a first temperature coefficient of resistivity and a second temperature coefficient of resistivity of the heating element;

[0026] A first temperature control module is used to obtain the resistance value of the heating element within a first preset time period during the process of the heating element heating the aerosol generation substrate, calculate the temperature of the heating element according to the resistance value of the heating element and the first resistivity temperature coefficient, and control the heating of the aerosol generation substrate by the heating element according to the temperature of the heating element;

[0027] The second temperature control module is used to obtain the resistance value of the heating element within a second preset time period during the process of the heating element heating the aerosol generating substrate, calculate the temperature of the heating element according to the resistance value of the heating element and the second resistivity temperature coefficient, and control the heating of the aerosol generating substrate by the heating element according to the temperature of the heating element.

[0028] According to a third aspect, an embodiment provides a heating-not-burning appliance, comprising a heating element and a temperature control system as described above; the heating element is used for heating under the control of the temperature control system.

[0029] According to a fourth aspect, an embodiment provides a computer-readable storage medium, on which a computer program is stored, and the computer program can be executed by a processor to implement the method as described above.

[0030] According to the fifth aspect, an embodiment provides a computer program product, including a computer program and / or instructions, characterized in that the computer program and / or instructions implement the method described above when executed by a processor.

[0031] According to the above-mentioned embodiment of a heating-not-burning appliance and its temperature control method / system, the temperature control method of the present application controls the resistivity temperature coefficient of the heating element in different heating stages in a heating cycle. Specifically, the first resistivity temperature coefficient of the heating element in the first heating stage and the second resistivity temperature coefficient of the heating element in the second heating stage are obtained respectively; within the first preset time period, the resistance value of the heating element is obtained, and the temperature of the heating element at the current stage is calculated according to the resistance value of the heating element and the first resistivity temperature coefficient, and then the heating of the aerosol generating substrate by the heating element is controlled according to the temperature; when entering the second preset time period, the resistance value of the current heating element is obtained, and the current temperature of the heating element is calculated according to the resistance value of the current heating element and the second resistivity temperature coefficient, and the heating of the aerosol generating substrate by the heating element is controlled according to the current temperature. By controlling the temperature of the heating element at different stages, precise heating and temperature control of the aerosol generating substrate at different stages can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 A flow chart of a temperature control method for a heating-without-combustion appliance provided in this embodiment;

[0033] Figure 2 This is a structural block diagram of the temperature control system of the heating without burning appliance provided in this embodiment.

[0034] Reference numerals: 10, acquisition module; 20, first temperature control module; 30, second temperature control module. DETAILED DESCRIPTION

[0035] The present invention is further described in detail below by specific embodiments in conjunction with the accompanying drawings. Wherein similar elements in different embodiments adopt associated similar element numbers. In the following embodiments, many detailed descriptions are for making the present application better understood. However, those skilled in the art can easily recognize that some features can be omitted in different situations, or can be replaced by other elements, materials, methods. In some cases, some operations related to the present application are not shown or described in the specification, this is to avoid the core part of the present application being overwhelmed by too much description, and for those skilled in the art, it is not necessary to describe these related operations in detail, and they can fully understand the related operations according to the description in the specification and the general technical knowledge in the art.

[0036] In addition, the features, operations or characteristics described in the specification can be combined in any appropriate manner to form various implementations. At the same time, the steps or actions in the method description can also be interchanged or adjusted in a manner that is obvious to those skilled in the art. Therefore, the various sequences in the specification and the drawings are only for the purpose of clearly describing a certain embodiment and are not meant to be a required sequence, unless otherwise specified that a certain sequence must be followed.

[0037] The serial numbers of the components in this document, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in this application, unless otherwise specified, include direct and indirect connections (couplings).

[0038] like Figure 1 As shown, the present embodiment provides a temperature control method for a heating-without-combustion device, comprising the following steps:

[0039] Step 100: Obtaining a first temperature coefficient of resistivity and a second temperature coefficient of resistivity of a heating element respectively through an acquisition module;

[0040] Step 200: In the process of heating the aerosol generating substrate by the heating element, the resistance value of the heating element is obtained within a first preset time period, the first temperature control module calculates the temperature of the heating element according to the resistance value of the heating element and the first resistivity temperature coefficient, and controls the heating of the aerosol generating substrate by the heating element according to the temperature of the heating element;

[0041] Step 300: During the process of the heating element heating the aerosol generating substrate, the resistance value of the heating element is obtained within a second preset time period, and the second temperature control module calculates the temperature of the heating element according to the resistance value and the second resistivity temperature coefficient of the heating element, and controls the heating of the aerosol generating substrate by the heating element according to the temperature of the heating element.

[0042] The temperature control method of this embodiment is used in the application. During the heating process, especially during the initial heating process (i.e., the heating stage), the components adjacent to the heating element (such as components used to fix the heating element) have a large temperature difference with the heating element, which causes the fixed components to absorb the temperature of the heating element. The fixed components rise in temperature from room temperature due to the heat, and the rate of increase is much lower than that of the heating element. At this time, the temperature difference between the heating element and the fixed components will be very large. Therefore, the heat transfer of the heating element will be relatively large. When the temperature of the fixed component has been heated to a relatively high temperature, the temperature difference between it and the heating element has reached a relatively stable state (i.e., the steady-state stage). At this time, the heat transfer of the heating element is smaller than that of the heating stage. Then, the TCR value obtained by temperature calibration in the steady-state stage is not suitable for controlling the temperature of the heating element in the heating stage (i.e., the heat transfer of the heating element in these two states is different). Therefore, in the process of heating the aerosol to generate the matrix, using a fixed TCR (temperature coefficient of resistivity) is not suitable for simultaneously controlling the temperature of the heating element in the heating stage and the steady-state stage.

[0043] Therefore, this solution proposes to use the first resistivity temperature coefficient to control the temperature of the heating element during the heating time of the heating element, and use the second resistivity temperature coefficient to control the temperature of the heating element during the steady-state stage of the heating element. Specifically, first, obtain the first resistivity temperature coefficient corresponding to the heating element in the heating stage and the second resistivity temperature coefficient corresponding to the steady-state stage, then, within the first preset time period (that is, the heating stage), obtain the resistance value of the heating element in real time, estimate the current temperature of the heating element according to the change in resistance value and the first resistivity temperature coefficient, and then control the heating element to heat the aerosol-generating matrix according to the preset heating temperature curve. If the current temperature of the heating element deviates from the heating temperature curve, adjust the heating power of the heating element so that the temperature of the heating element is basically consistent with the heating temperature curve to achieve precise temperature control. After the heating in the first preset time period is completed, during the subsequent second preset time period (i.e., the steady-state stage of heating), the resistance value of the heating element is obtained in real time again. Similarly, the current temperature of the heating element is estimated based on the change in the resistance value and the second resistivity temperature coefficient. Then, the heating element is controlled to heat the aerosol generating matrix according to the preset heating temperature curve. If the current temperature of the heating element deviates from the heating temperature curve, the heating power of the heating element is adjusted to keep the temperature of the heating element basically consistent with the heating temperature curve, so as to achieve precise temperature control.

[0044] Since the temperature coefficient of resistivity is a parameter that reflects the relationship between the resistance of the heating element and the heating temperature, the TCR value determines the change in resistance at different temperatures. Therefore, in the first preset time period, since the heat transfer of the heating element at this stage is larger than that in the steady state, in order to ensure that the heating element heats the aerosol generating substrate according to the preset heating temperature curve, the value of the temperature coefficient of resistivity can be reduced to achieve regulation. Therefore, when heating in the first preset time period, the present embodiment enables the heating element to use the first temperature coefficient of resistivity to accurately control the temperature of the heating stage. After entering the steady state stage (i.e., in the second preset time period) after the heating stage, it switches to the second temperature coefficient of resistivity calibrated in the steady state for temperature control. By adopting the segmented control strategy of the present embodiment, the temperature of the heating element can be adjusted more finely, thereby meeting the different temperature requirements of the aerosol generating substrate in different heating stages.

[0045] Furthermore, in some embodiments, before respectively obtaining the first resistivity temperature coefficient and the second resistivity temperature coefficient of the heating element, it also includes: calibrating the heating element to respectively calculate the first resistivity temperature coefficient and the second resistivity temperature coefficient of the heating element, and the first resistivity temperature coefficient and the second resistivity temperature coefficient are different.

[0046] Specifically, calibrating the heating element to calculate the first temperature coefficient of resistivity and the second temperature coefficient of resistivity of the heating element respectively includes the following steps:

[0047] Controlling the heating element to heat to a preset temperature, obtaining a first initial resistance value, a first end point resistance value, a first initial temperature, and a first end point temperature of the heating element in a first preset time period;

[0048] Calculate a first resistivity temperature coefficient of the heating element according to the first initial resistance, the first endpoint resistance, the first initial temperature and the first endpoint temperature;

[0049] Obtaining a second initial resistance value, a second end point resistance value, a second initial temperature and a preset temperature of the heating element in a second preset time period;

[0050] The second resistivity temperature coefficient of the heating element is calculated according to the second initial resistance, the second endpoint resistance, the second initial temperature and the preset temperature.

[0051] The resistance value of the heating element at different temperatures is measured experimentally, the resistance value corresponding to each temperature point is recorded, and a resistance-temperature curve is plotted. According to the resistance-temperature curve, the TCR value of the heating element in different temperature ranges is calculated. Specifically, the first initial resistance value, the first end resistance value, the first initial temperature and the first end temperature of the first preset time period are recorded, and the first resistivity temperature coefficient of the heating element is calculated according to the first initial resistance value, the first end resistance value, the first initial temperature and the first end temperature. The calculation formula is:

[0052]

[0053] Where TCR1 is the first resistivity temperature coefficient, R 11 is the first initial resistance, R 12 is the first end point resistance, T 11 is the first initial temperature, T 12 is the first endpoint temperature;

[0054] The second initial resistance value, the second end point resistance value, the second initial temperature and the preset temperature of the second preset time period are recorded, and the second resistivity temperature coefficient of the heating element is calculated according to the second initial resistance value, the second end point resistance value, the second initial temperature and the preset temperature, and the calculation formula is:

[0055]

[0056] Where TCR2 is the second resistivity temperature coefficient, R 21 is the second initial resistance, R 22 is the second end point resistance, T 21 is the second initial temperature, T 22 is the preset temperature.

[0057] In some embodiments, the first preset time period is connected to the second preset time period; the first endpoint resistance value is the same as the second initial resistance value, and the first endpoint temperature is the same as the second initial temperature.

[0058] In the heat-not-burn smoking device, in order to improve the accuracy of temperature control, this scheme usually divides the heating process into two or more stages, and sets different TCR values ​​for each stage. This segmented control strategy can adjust the temperature of the heating element more carefully, so as to meet the different temperature requirements of tobacco materials at different heating stages. Taking this embodiment as an example, when the heating process is divided into two stages, for example, when the heating element is heated to a preset temperature (such as heating to 280 degrees, the heating time is 240S), the heating element starts to heat to the first preset time (such as 30S) and calibrates to obtain TCR1, and calibrates to obtain TCR2 within 30S-240S. In the heating process, the heating element starts to heat to 30S and uses TCR1 for temperature control, and uses TCR2 for temperature control within 30S-240S. Similarly, for multiple TCRs, corresponding to different time intervals, the TCR corresponding time interval used for heating is consistent with the TCR corresponding time interval obtained during calibration, thereby improving the accuracy of temperature control.

[0059] Furthermore, in some embodiments, after calibrating the heating element to respectively calculate the first temperature coefficient of resistivity and the second temperature coefficient of resistivity of the heating element, it also includes: saving the first temperature coefficient of resistivity and the second temperature coefficient of resistivity.

[0060] After calibrating to obtain the first resistivity temperature coefficient and the second resistivity temperature coefficient, the first resistivity temperature coefficient and the second resistivity temperature coefficient are saved in the system so that the user can directly call the resistivity temperature coefficients at different stages according to usage requirements to more accurately control the heating temperature of the heating element, reduce temperature fluctuations and errors, and ensure that the heating effect and taste of the product are consistent, thereby improving product quality and stability.

[0061] like Figure 2 As shown, the temperature control system of a heating-not-burning appliance provided in this embodiment includes an acquisition module 10, a first temperature control module 20 and a second temperature control module 30. Among them, the acquisition module 10 is used to respectively acquire the first resistivity temperature coefficient and the second resistivity temperature coefficient of the heating element; the first temperature control module 20 is used to acquire the resistance value of the heating element within a first preset time period during the process of the heating element heating the aerosol-generating substrate, calculate the temperature of the heating element according to the resistance value of the heating element and the first resistivity temperature coefficient, and control the heating of the aerosol-generating substrate by the heating element according to the temperature of the heating element; the second temperature control module 30 is used to acquire the resistance value of the heating element within a second preset time period during the process of the heating element heating the aerosol-generating substrate, calculate the temperature of the heating element according to the resistance value of the heating element and the second resistivity temperature coefficient, and control the heating of the aerosol-generating substrate by the heating element according to the temperature of the heating element.

[0062] The temperature control system of this embodiment, after acquiring the first resistivity temperature coefficient and the second resistivity temperature coefficient through the acquisition module 10, adopts a segmented control strategy to control the heating element to heat the aerosol generating substrate at different stages, and can more finely adjust the temperature of the heating element, thereby meeting the different temperature requirements of the aerosol generating substrate at different heating stages, and can achieve precise heating and temperature control of the aerosol generating substrate at different stages.

[0063] Among them, the functions and effects of the acquisition module 10, the first temperature control module 20 and the second temperature control module 30 have been described in detail in the above embodiments, and will not be described in detail in this embodiment.

[0064] The present embodiment provides a heating-not-burning appliance, comprising a heating element and the above-mentioned temperature control system; the heating element is used for heating under the control of the temperature control system.

[0065] Specifically, since the temperature control system of the heating-without-combustion appliance has been described in detail in the above embodiments, this embodiment will not be described in detail here.

[0066] This embodiment provides a computer readable storage medium, on which a computer program is stored, and the computer program can be executed by a processor to implement the above method. Since the temperature control method of the heating non-combustion appliance has been described in detail in the above embodiment, this embodiment will not be repeated here.

[0067] The present embodiment provides a computer program product, including a computer program and / or an instruction, wherein the computer program and / or the instruction implement the above method when executed by a processor. In view of the fact that the temperature control method of the heating-not-burning appliance has been described in detail in the above embodiment, this embodiment will not be repeated in detail.

[0068] Those skilled in the art will appreciate that all or part of the functions of the various methods in the above-mentioned embodiments can be implemented by hardware or by computer programs. When all or part of the functions in the above-mentioned embodiments are implemented by computer programs, the program can be stored in a computer-readable storage medium, and the storage medium can include: read-only memory, random access memory, disk, optical disk, hard disk, etc., and the program is executed by a computer to implement the above-mentioned functions. For example, the program is stored in the memory of the device, and when the program in the memory is executed by the processor, all or part of the above-mentioned functions can be implemented. In addition, when all or part of the functions in the above-mentioned embodiments are implemented by computer programs, the program can also be stored in a storage medium such as a server, another computer, disk, optical disk, flash disk or mobile hard disk, and can be downloaded or copied and saved in the memory of the local device, or the system of the local device is updated, and when the program in the memory is executed by the processor, all or part of the functions in the above-mentioned embodiments can be implemented.

[0069] The above specific examples are used to illustrate the present invention, which is only used to help understand the present invention and is not intended to limit the present invention. For those skilled in the art, according to the concept of the present invention, some simple deductions, modifications or substitutions can be made.

Claims

1. A method for controlling the temperature of a heating-not-burning appliance, characterized in that: include: respectively obtaining a first temperature coefficient of resistivity and a second temperature coefficient of resistivity of the heating element; In the process of heating the aerosol generating substrate by the heating element, within a first preset time period, the resistance value of the heating element is obtained, the temperature of the heating element is calculated according to the resistance value of the heating element and the first resistivity temperature coefficient, and the heating of the aerosol generating substrate by the heating element is controlled according to the temperature of the heating element; In the process of the heating element heating the aerosol generating substrate, within a second preset time period, the resistance value of the heating element is obtained, the temperature of the heating element is calculated based on the resistance value of the heating element and the second resistivity temperature coefficient, and the heating of the aerosol generating substrate by the heating element is controlled based on the temperature of the heating element.

2. The temperature control method according to claim 1, characterized in that: Before respectively obtaining the first temperature coefficient of resistivity and the second temperature coefficient of resistivity of the heating element, the method further includes: The heating element is calibrated to respectively calculate a first temperature coefficient of resistivity and a second temperature coefficient of resistivity of the heating element, wherein the first temperature coefficient of resistivity and the second temperature coefficient of resistivity are different.

3. The temperature control method according to claim 2, characterized in that: The step of calibrating the heating element to respectively calculate a first temperature coefficient of resistivity and a second temperature coefficient of resistivity of the heating element comprises: Controlling the heating element to heat to a preset temperature, and obtaining a first initial resistance value, a first end point resistance value, a first initial temperature, and a first end point temperature of the heating element in the first preset time period; Calculate a first resistivity temperature coefficient of the heating element according to the first initial resistance, the first endpoint resistance, the first initial temperature and the first endpoint temperature; Obtaining a second initial resistance value, a second end point resistance value, a second initial temperature and a preset temperature of the heating element in the second preset time period; The second resistivity temperature coefficient of the heating element is calculated according to the second initial resistance, the second endpoint resistance, the second initial temperature and the preset temperature.

4. The temperature control method according to claim 3, characterized in that: The first preset time period and the second preset time period are connected; the first endpoint resistance value and the second initial resistance value are the same, and the first endpoint temperature and the second initial temperature are the same.

5. The temperature control method according to claim 3, characterized in that: The calculation formula of the first resistivity temperature coefficient is: Where TCR1 is the first resistivity temperature coefficient, R 11 is the first initial resistance, R 12 is the first end point resistance, T 11 is the first initial temperature, T 12 is the first endpoint temperature; The calculation formula of the second resistivity temperature coefficient is: Where TCR2 is the second resistivity temperature coefficient, R 21 is the second initial resistance, R 22 is the second end point resistance, T 21 is the second initial temperature, T 22 is the preset temperature.

6. The temperature control method according to claim 2, characterized in that: After calibrating the heating element to calculate the first temperature coefficient of resistivity and the second temperature coefficient of resistivity of the heating element respectively, the method further includes: The first temperature coefficient of resistivity and the second temperature coefficient of resistivity are saved.

7. A temperature control system for a heating-not-burning appliance, characterized in that: include: An acquisition module, used to respectively acquire a first temperature coefficient of resistivity and a second temperature coefficient of resistivity of the heating element; A first temperature control module is used to obtain the resistance value of the heating element within a first preset time period during the process of the heating element heating the aerosol generation substrate, calculate the temperature of the heating element according to the resistance value of the heating element and the first resistivity temperature coefficient, and control the heating of the aerosol generation substrate by the heating element according to the temperature of the heating element; The second temperature control module is used to obtain the resistance value of the heating element within a second preset time period during the process of the heating element heating the aerosol generating substrate, calculate the temperature of the heating element according to the resistance value of the heating element and the second resistivity temperature coefficient, and control the heating of the aerosol generating substrate by the heating element according to the temperature of the heating element.

8. A heating without burning device, characterized in that: comprising a heating element and a temperature control system as claimed in claim 7; The heating element is used for heating under the control of the temperature control system.

9. A computer-readable storage medium, characterized in that: A computer program is stored on the medium, and the computer program can be executed by a processor to implement the method according to any one of claims 1 to 6.

10. A computer program product comprising a computer program and / or instructions, characterized in that: When the computer program and / or the instructions are executed by a processor, the method according to any one of claims 1 to 6 is implemented.

Images