CN117413981A - Temperature control method based on induction heating and heating system - Google Patents
Temperature control method based on induction heating and heating system Download PDFInfo
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- CN117413981A CN117413981A CN202210809486.8A CN202210809486A CN117413981A CN 117413981 A CN117413981 A CN 117413981A CN 202210809486 A CN202210809486 A CN 202210809486A CN 117413981 A CN117413981 A CN 117413981A
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 170
- 230000006698 induction Effects 0.000 title claims abstract description 58
- 238000000034 method Methods 0.000 title claims abstract description 38
- 230000005672 electromagnetic field Effects 0.000 claims abstract description 9
- 235000019504 cigarettes Nutrition 0.000 claims description 21
- 230000001939 inductive effect Effects 0.000 claims description 5
- 230000005291 magnetic effect Effects 0.000 description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 4
- 230000035699 permeability Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000005293 ferrimagnetic effect Effects 0.000 description 2
- 230000005294 ferromagnetic effect Effects 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 230000005298 paramagnetic effect Effects 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 229910000990 Ni alloy Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 150000004982 aromatic amines Chemical class 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 239000003550 marker Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 239000000941 radioactive substance Substances 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 230000000391 smoking effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24F—SMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES
- A24F40/00—Electrically operated smoking devices; Component parts thereof; Manufacture thereof; Maintenance or testing thereof; Charging means specially adapted therefor
- A24F40/50—Control or monitoring
- A24F40/57—Temperature control
-
- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24F—SMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES
- A24F40/00—Electrically operated smoking devices; Component parts thereof; Manufacture thereof; Maintenance or testing thereof; Charging means specially adapted therefor
- A24F40/40—Constructional details, e.g. connection of cartridges and battery parts
- A24F40/46—Shape or structure of electric heating means
- A24F40/465—Shape or structure of electric heating means specially adapted for induction heating
Abstract
The application belongs to the technical field of induction heating, and provides a temperature control method and a heating system based on induction heating, wherein the method adopts an inductor capable of generating an alternating electromagnetic field to heat a heating component, and the heating component comprises a first heating element with a first Curie temperature and a second heating element with a second Curie temperature, which are arranged in close proximity; acquiring a time-varying curve of an operating parameter of the inductor in the heating process of the heating component, wherein the operating parameter comprises at least one of inductance, inductance and impedance, and determining a first maximum value and a second maximum value of the operating parameter in an incremental mode; the alternating current of the power supply assembly is controlled such that the actual operating parameter remains between the difference of the first maximum value minus the maximum deviation value and the difference of the first maximum value minus the minimum deviation value after reaching said first maximum value minus a predetermined value. According to the temperature control method, the temperature of the heating component can be controlled without directly measuring the temperature of the heating component.
Description
Technical Field
The application relates to the technical field of induction heating, in particular to a temperature control method and a heating system based on induction heating.
Background
In the field of heating and non-combustion, in order to avoid harmful substances such as aromatic amines, radioactive substances and the like generated by the combustion of cigarettes, a heating component is often adopted to heat the cigarettes, and the temperature of the cigarettes is controlled in a proper range below the ignition point of the cigarettes, so that the cigarettes only rise in temperature and cannot burn.
In the prior art, temperature sensors such as thermocouples and platinum resistors are often adopted to measure the temperature of the heating component and feed the temperature back to the controller, and the controller controls the heat quantity provided by the heat source to the heating component according to the temperature fed back by the temperature sensors so as to maintain the temperature of the heating component in a proper range, however, for the heating component embedded in the cigarette, it is difficult to directly measure the temperature of the heating component after the temperature sensor is connected with the heating component, and therefore, the temperature of the heating component is difficult to control.
Disclosure of Invention
An object of the embodiment of the application is to provide a temperature control method and a heating system based on induction heating, so as to solve the technical problem that when a heating component in the prior art is buried in a cigarette, the temperature of the heating component is difficult to directly measure and control.
In order to achieve the above purpose, the technical scheme adopted in the application is as follows: there is provided a temperature control method based on induction heating, the temperature control method based on induction heating including:
providing alternating current to an inductor by adopting a power supply assembly, so that the inductor generates an alternating electromagnetic field;
the inductor is coupled with a heating component in an inductive mode, the heating component comprises a first heating element and a second heating element, the first heating element is arranged in close proximity, the first heating element has a first Curie temperature, and the second heating element has a second Curie temperature higher than the first Curie temperature;
acquiring a time-varying curve of an operating parameter of the inductor during a temperature rise of the heating component, wherein the operating parameter comprises at least one of inductance, inductance and impedance, and the operating parameter has a first maximum value and a second maximum value in the time-varying curve of the operating parameter, and the first maximum value is smaller than the second maximum value;
the temperature of the heat generating component is controlled by controlling the alternating current of the power supply component such that the actual operating parameter remains between the difference of the first maximum value minus the maximum deviation value and the difference of the first maximum value minus the minimum deviation value after reaching the difference of the first maximum value minus the predetermined value.
In one embodiment, the minimum deviation value is greater than or equal to zero and the maximum deviation value is greater than zero; the step of maintaining the actual operating parameter between the difference of the first maximum value minus the maximum deviation value and the difference of the first maximum value minus the minimum deviation value after reaching the difference of the first maximum value minus the predetermined value by controlling the alternating current of the power supply assembly comprises:
controlling the power supply assembly to supply alternating current to the inductor when the heating assembly is at room temperature until the actual operating parameter reaches the difference value of the first maximum value minus the minimum deviation value for the first time;
when the actual operating parameter reaches the difference value of the first maximum value minus the minimum deviation value, controlling the power supply assembly to stop supplying alternating current to the sensor;
when the actual operating parameter reaches the difference of the first maximum value minus the maximum deviation value, the power supply assembly is controlled to supply alternating current to the sensor, and the previous step is returned.
In one embodiment, the minimum deviation value is greater than or equal to zero and the maximum deviation value is greater than zero; the step of maintaining the actual operating parameter between the difference of the first maximum value minus the maximum deviation value and the difference of the first maximum value minus the minimum deviation value after reaching the difference of the first maximum value minus the predetermined value by controlling the alternating current of the power supply assembly comprises:
controlling the power supply assembly to supply alternating current to the inductor when the heating assembly is at room temperature until the actual operating parameter reaches the difference value of the first maximum value minus the maximum deviation value for the second time;
when the actual operating parameter reaches the difference of the first maximum value minus the maximum deviation value, controlling the power supply assembly to stop supplying alternating current to the sensor;
when the actual operating parameter reaches the difference value of the first maximum value minus the minimum deviation value, the power supply assembly is controlled to supply alternating current to the sensor, and the previous step is returned.
In one embodiment, the minimum deviation value is equal to zero and the maximum deviation value is greater than zero; the step of maintaining the actual operating parameter between the difference of the first maximum value minus the maximum deviation value and the difference of the first maximum value minus the minimum deviation value after reaching the difference of the first maximum value minus the predetermined value by controlling the alternating current of the power supply assembly comprises:
controlling the power supply assembly to supply alternating current to the inductor when the heating assembly is at room temperature until the actual operating parameter reaches the difference value of the first maximum value minus the maximum deviation value for the second time;
when the even number of times of the actual operation parameter reaches the difference value of the first maximum value minus the maximum deviation value, controlling the power supply assembly to stop supplying alternating current to the inductor;
when the actual operation parameter reaches the difference value of the first maximum value minus the maximum deviation value for the odd number of times, the power supply assembly is controlled to supply alternating current to the sensor, and the previous step is returned.
In one embodiment, the first heat generating element and the second heat generating element are both plate-shaped structures, and the first heat generating element and the second heat generating element are stacked.
In one embodiment, the first heating element and the second heating element are both in a cylindrical structure, and the first heating element and the second heating element are mutually sleeved.
In one embodiment, the first heating element is in a columnar structure, the second heating element is in a cylindrical structure, and the second heating element is sleeved on the periphery of the first heating element.
In one embodiment, the inductor is a planar coil or a threaded coil.
In one embodiment, the power supply assembly comprises a direct current power supply and an alternating current generator, wherein the direct current power supply is used for providing direct current voltage or direct current for the alternating current generator; the alternating current generator is for generating the alternating current.
To achieve the above object, the present application further provides an induction heating-based heating system for implementing the above induction heating-based temperature control method, the induction heating-based heating system comprising:
a power supply assembly for providing an alternating current;
an inductor for loading the alternating current and generating an alternating electromagnetic field;
a heat generating assembly inductively coupled to the inductor for heating the cigarette, the heat generating assembly including a first heat generating member having a first curie temperature and a second heat generating member having a second curie temperature higher than the first curie temperature disposed in close proximity;
the controller is electrically connected with the power supply assembly and used for controlling the opening and closing of the power supply assembly and the output power; and the controller is electrically connected with the inductor and is used for detecting the operation parameter of the inductor, wherein the operation parameter comprises at least one of inductance, inductive reactance or impedance.
The induction heating-based temperature control method and the heating system provided by the application have the beneficial effects that: compared with the prior art, the temperature control method based on induction heating provided by the application adopts the inductor loaded with alternating current to heat the heating component; then, in the process of temperature rise of the heating component, acquiring a time-varying curve of the operation parameter of the sensor, and determining a first maximum value and a second maximum value of the operation parameter in the time-varying curve of the operation parameter; finally, the operation of the power supply assembly is controlled so that the actual operating parameter of the sensor remains between the difference of the first maximum value minus the maximum deviation value and the difference of the first maximum value minus the minimum deviation value after reaching the difference of the first maximum value minus the predetermined value, and the temperature of the heating assembly is controlled. According to the control method, the temperature of the heating component is not required to be directly measured by adopting the temperature sensor, the temperature of the heating component can be controlled within the working temperature range required by cigarettes according to the operation parameters of the sensor by measuring the operation parameters of the sensor, and the temperature control of the heating component is realized.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required for the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a heating system based on induction heating according to an embodiment of the present application;
fig. 2 is a schematic structural diagram of a heating system based on induction heating according to an embodiment of the present application;
FIG. 3 is an enlarged view of a portion A of the induction heating-based heating system shown in FIG. 2;
FIG. 4 is a graph showing magnetic permeability of a first heat generating element of an induction heating-based heating system according to an embodiment of the present application as a function of temperature;
FIG. 5 is a graph showing magnetic permeability of a second heat generating element of the induction heating-based heating system according to an embodiment of the present application as a function of temperature;
FIG. 6 is a graph of temperature versus time for a heat generating component of an induction heating-based heating system provided in an embodiment of the present application;
FIG. 7 is a graph of the impedance of an inductor of an induction heating-based heating system provided by an embodiment of the present application over time;
FIG. 8 is a graph of inductance versus time for an inductor of an induction heating-based heating system provided in an embodiment of the present application;
FIG. 9 is a graph of inductance of an inductor of an induction heating-based heating system provided in an embodiment of the present application over time;
fig. 10 is a flowchart of a temperature control method based on induction heating according to an embodiment of the present application.
Wherein, each reference sign in the figure:
a 100-sensor;
200-heating components; 210-a first heat generating element; 220-a second heat generating element;
300-cigarette;
400-smoking set.
The point on the curve of the o-impedance over time where the impedance first reaches the difference of the first maximum minus the maximum deviation;
the point on the curve of the p-impedance over time where the impedance first reaches the difference of the first maximum minus the minimum deviation;
the impedance of the s-impedance curve over time reaches a point on the second time of the difference of the first maximum value minus the minimum deviation value;
the t-impedance is plotted over time at a point where the impedance reaches the difference of the first maximum minus the maximum deviation a second time.
Detailed Description
Embodiments of the present application are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and intended for the purpose of explaining the present application and are not to be construed as limiting the present application.
In the description of the present application, it should be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate description of the present application and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present application.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
Referring to fig. 1 to 3, a heating system based on induction heating according to an embodiment of the present application will now be described. The induction heating-based heating system is used for realizing an induction heating-based temperature control method.
The induction heating-based heating system includes an inductor 100, a heating assembly 200, a power supply assembly (not shown), and a controller (not shown). Wherein the power supply assembly is used for providing alternating current; the inductor 100 is used for loading an alternating current and generating an alternating electromagnetic field; the inductor 100 inductively couples to the heating element 200, the heating element 200 is used for heating the cigarette 300, and the heating element 200 comprises a first heating element 210 and a second heating element 220 which are arranged in close proximity, the first heating element 210 has a first curie temperature, and the second heating element 220 has a second curie temperature higher than the first curie temperature; the controller is electrically connected with the power supply assembly and used for controlling the opening and closing of the power supply assembly and the output power; and the controller is electrically connected to the inductor 100 and is used for detecting an operation parameter of the inductor 100, wherein the operation parameter includes at least one of inductance, inductance or impedance.
In particular, the power supply assembly may comprise a direct current power supply for providing a direct voltage or a direct current to the alternating current generator and an alternating current generator for generating an alternating current.
Specifically, the inductor 100 may be a planar coil or a screw coil, and one end of the inductor 100, the heating assembly 200, and the cigarette 300 may be simultaneously installed inside the smoking article 400.
In the related art, in order to achieve both heat generation efficiency and ease of temperature control, the heat generating module 200 is generally provided with two heat generating structures having different curie temperatures. The heat generating structure having a higher curie temperature is used to optimize the heat generating efficiency of the entire heat generating assembly 200. The lower curie temperature heat generating structure serves as a temperature marker to facilitate controlling the temperature of the heat generating assembly 200 within the desired operating temperature range of the cigarette 300. In this embodiment, the heat generating component 200 is also provided with a first heat generating element 210 and a second heat generating element 220 with different curie temperatures, wherein the first curie temperature of the first heat generating element 210 is within the required operating temperature range of the cigarette 300, and the second curie temperature of the second heat generating element 220 is higher than the first curie temperature, i.e. is greater than the maximum value of the required operating temperature range of the cigarette 300. For example, if the desired operating temperature range of the cigarette 300 is 340-360 ℃, the first curie temperature of the first heat generating element 210 may be set to 350 ℃ and the second curie temperature of the second heat generating element 220 may be set to 770 ℃. In operation, when the temperature of the heat generating component 200 increases to the first curie temperature, the magnetic property of the first heat generating element 210 changes from ferromagnetic or ferrimagnetic to paramagnetic, which causes abrupt changes in the operating parameters (inductance, impedance) of the inductor 100; when the temperature of the heat generating component 200 continues to rise to the second curie temperature, the magnetic property of the second heat generating element 220 is changed from ferromagnetic or ferrimagnetic property to paramagnetic property, which causes the operation parameters of the sensor 100 to be mutated again. The above-described correlation between the temperature, magnetic properties, and operating parameters of the sensor 100 of the heat-generating component 200 may be used by the controller to control the temperature of the heat-generating component 200 within a desired operating temperature range of the cigarette 300.
Specifically, the heat generating component 200 may have various structures, for example, the first heat generating member 210 and the second heat generating member 220 are each in a plate-like structure, and the first heat generating member 210 and the second heat generating member 220 are stacked; for example, the first heat generating element 210 and the second heat generating element 220 are both in a tubular structure, and the first heat generating element 210 and the second heat generating element 220 are sleeved with each other; for another example, the second heat generating element 220 has a cylindrical structure, and the second heat generating element 220 is sleeved on the outer periphery of the first heat generating element 210. With the heat generating component 200 having the above-described structure, heat conduction between the first heat generating member 210 and the second heat generating member 220 can be performed well. The first heat generating member 210 may be made of nickel, nickel alloy, or the like, and the second heat generating member 220 may be made of aluminum, iron-containing material, or the like, and may be provided as needed.
Specifically, the controller is configured to coordinate and control the operation of the power supply assembly, the sensor 100, and the heat generating assembly 200, and control the temperature of the heat generating assembly 200 within the operating temperature range required by the cigarette 300 by utilizing the correlation between the temperature, the magnetic property, and the operating parameters of the sensor 100 of the heat generating assembly 200.
In the induction heating-based heating system provided in this embodiment, during operation, the power supply assembly provides the inductor 100 with an alternating current, the inductor 100 loaded with the alternating current generates an alternating electromagnetic field, the heating assembly 200 generates eddy current and/or hysteresis loss in the alternating electromagnetic field, the temperature of the heating assembly 200 rises, and at the same time, the controller detects and analyzes the operation parameters (inductance, inductance and impedance) of the inductor 100, and controls the operation (opening and closing) of the power supply assembly according to the operation parameters of the inductor 100, so as to control the temperature of the heating assembly 200 within the required operation temperature range of the cigarette 300.
To more clearly explain the principles of the present application, the present application also provides a heating system based on induction heating. The heating system based on induction heating, the heating assembly 200 comprises two second heating elements 220 with plate-shaped structures and a first heating element 210 clamped between the two second heating elements 220. The first heat generating member 210 is made of nickel with a thickness of 0.2mm, and the second heat generating member 220 is made of iron with a thickness of 0.15mm. The power supply assembly loads a power supply with a voltage of 11V and a frequency of 100kHz into the induction coil.
Referring to fig. 4, fig. 4 is a graph showing the magnetic permeability of the first heat generating element 210 according to the present embodiment, and it can be seen that the first curie temperature of the first heat generating element 210 is 350 ℃; referring to fig. 5, fig. 5 is a graph showing the magnetic permeability of the second heat generating element 220 according to the present embodiment, and it can be seen that the second curie temperature of the second heat generating element 220 is 770 ℃.
The temperature rise process of the heat generating component 200 is simulated using thermal simulation software, which may be Simcenter Flotherm, COMSOL or ANSYS. As a result of the simulation, referring to fig. 6 to 9, fig. 6 is a graph showing the temperature of the heat generating component 200 with time; FIG. 7 is a graph of impedance in the induction coil over time during an increase in temperature of the heat generating component 200; FIG. 8 is a graph of inductance in an induction coil over time during an increase in temperature of the heat generating component 200; fig. 9 is a graph showing the change of inductance in the induction coil with time during the temperature rise of the heat generating component 200.
Referring to fig. 6, it can be seen that the temperature of the heat generating component 200 gradually increases to and remains at the second curie temperature 770 ℃ over time. And at 4.5s, the temperature of the heat generating component 200 reached the first curie temperature, 350 c, and at 10.5s, the temperature of the heat generating component 200 reached the second curie temperature, 770 c.
Referring to fig. 7 through 9, it can be seen that the operating parameter of the inductor 100 has a first maximum and a second maximum over time, and that the operating parameters (inductance, impedance) each have a first maximum at 4.5s, and the operating parameters (inductance, impedance) each have a second maximum at 10.5s,
it can be seen that when the operating parameter of the inductor 100 is at the first maximum, the temperature of the heat generating component 200 reaches the first curie temperature, and when the operating parameter of the inductor 100 is at the second maximum, the temperature of the heat generating component 200 reaches the second curie temperature, which indicates that there is a correlation between the temperature of the heat generating component 200 and the operating parameter of the inductor 100, and the temperature of the heat generating component 200 can be controlled according to feedback of the operating parameter of the inductor 100.
Referring to fig. 10, the present application further provides an induction heating-based temperature control method for controlling the temperature of the heating element 200 within a desired operating temperature range of the cigarette 300, wherein the induction heating-based temperature control method comprises:
step 101, providing alternating current to the inductor 100 by adopting a power supply assembly, so that the inductor 100 generates an alternating electromagnetic field;
step 102, heating the heat generating component 200 by using the inductor 100, wherein the inductor 100 and the heat generating component 200 are coupled with each other in an inductive manner, the heat generating component 200 comprises a first heat generating element 210 and a second heat generating element 220 which are arranged in close proximity, the first heat generating element 210 has a first curie temperature, and the second heat generating element 220 has a second curie temperature higher than the first curie temperature;
step 103, acquiring a time-varying curve of an operation parameter of the inductor 100 during a temperature rise of the heating component 200, wherein the operation parameter includes at least one of inductance, inductance and impedance, and determining a first maximum value and a second maximum value of the operation parameter in the time-varying curve of the operation parameter, and the first maximum value is smaller than the second maximum value;
step 104, controlling the alternating current of the power supply assembly, so that the actual operation parameter is kept between the difference of the first maximum value minus the maximum deviation value and the difference of the first maximum value minus the minimum deviation value after the difference of the first maximum value minus the predetermined value is reached, thereby controlling the temperature of the heating assembly 200.
It should be noted that, as described above, when the temperature of the heat generating component 200 reaches the first curie temperature, the operation parameter of the sensor 100 may be suddenly changed, and when the temperature of the heat generating component 200 reaches the second curie temperature, the operation parameter of the sensor 100 may be suddenly changed again, so it may be understood that, in step 103, the temperature of the heat generating component 200 is approximately equal to the first curie temperature when the operation parameter is at the first maximum on the time-varying curve, and the temperature of the heat generating component 200 is approximately equal to the second curie temperature when the operation parameter is at the second maximum on the time-varying curve.
It should be noted that, in step 104, the predetermined value may be equal to the maximum deviation value, the minimum deviation value, or any value between the minimum deviation value and the maximum deviation value, and referring to fig. 7, the maximum deviation value may be understood as a difference between the ordinate of the dashed line a and the ordinate of the dashed line c in fig. 7, and the minimum deviation value may be understood as a difference between the ordinate of the dashed line a and the ordinate of the dashed line b in fig. 7, where the ordinate of the dashed line a is equal to the first maximum value. The maximum deviation value is a positive number, the minimum deviation value is a non-negative number, and the maximum deviation value and the minimum deviation value can be set according to the slope of the curve of the change of the operation parameter with time, the size of the working temperature range required for heating the cigarette 300, and other parameters, which are not limited only herein.
According to the induction heating-based temperature control method provided by the embodiment, the temperature of the heating component 200 is not required to be controlled after the temperature sensor is used for measuring the temperature of the heating component 200, and the temperature of the heating component 200 can be controlled within a smaller temperature range slightly lower than the first curie temperature, a smaller temperature range slightly higher than the first curie temperature or a smaller temperature range containing the first curie temperature according to the operating parameters of the inductor 100 by measuring the operating parameters of the inductor 100 which are easier to obtain.
In one embodiment, the minimum deviation value is greater than or equal to zero and the maximum deviation value is greater than zero; the step of controlling the alternating current of the power supply assembly such that the actual operating parameter remains between the difference of the first maximum value minus the maximum deviation value and the difference of the first maximum value minus the minimum deviation value after reaching the difference of the first maximum value minus the predetermined value comprises:
step 1041, controlling the power supply assembly to supply the alternating current to the inductor 100 until the actual operating parameter reaches the first maximum value minus the minimum deviation value for the first time (e.g. when the operating parameter is impedance, i.e. until the actual operating parameter reaches the first point p on the curve of the impedance with time in fig. 7, and reaches the second point s on the curve of the impedance with time in fig. 7), when the actual operating parameter reaches the first maximum value minus the minimum deviation value for the second time;
step 1042, when the actual operating parameter reaches the difference of the first maximum value minus the minimum deviation value, controlling the power supply assembly to stop supplying the alternating current to the inductor 100;
in step 1043, when the actual operating parameter reaches the difference of the first maximum value minus the maximum deviation value, the power supply assembly is controlled to provide an alternating current to the inductor 100, and step 1042 is returned.
In the induction heating-based temperature control method provided in the present embodiment, the predetermined value is set to the minimum deviation value. In the induction heating-based temperature control method provided in the present embodiment, when the minimum deviation value is equal to zero, the temperature of the heat generating component 200 may be controlled between the first curie temperature minus a first predetermined value (positive number) and the first curie temperature, and the magnitude of the first predetermined value is related to the magnitude of the selected maximum deviation value, for example, when the first curie temperature is 350 ℃, a suitable maximum deviation value is selected, and the temperature of the heat generating component 200 may be controlled between 342 ℃ and 350 ℃.
In the induction heating-based temperature control method provided in the present embodiment, when the minimum deviation value is greater than zero, the temperature of the heat generating component 200 may be controlled between the first curie temperature minus a second predetermined value (positive number) and the first curie temperature minus a third predetermined value (positive number), where the magnitude of the second predetermined value is related to the selected maximum deviation value, and the magnitude of the third predetermined value is related to the selected minimum deviation value. For example, when the first curie temperature is 350 ℃, the temperature of the heat generating component 200 can be controlled between 340 ℃ and 345 ℃ by selecting a suitable maximum deviation value and a suitable minimum deviation value.
In one embodiment, the minimum deviation value is greater than or equal to zero and the maximum deviation value is greater than zero; the step of controlling the alternating current of the power supply assembly such that the actual operating parameter remains between the difference of the first maximum value minus the maximum deviation value and the difference of the first maximum value minus the minimum deviation value after reaching the first maximum value minus the predetermined value comprises:
step 1044, controlling the power supply assembly to supply the alternating current to the inductor 100 until the actual operating parameter reaches the first maximum value minus the maximum deviation value for the second time (e.g. when the operating parameter is impedance, i.e. until the actual operating parameter reaches a point t on the curve of the impedance over time in fig. 7, and at a point o on the curve of the impedance over time in fig. 7, the actual operating parameter reaches the first maximum value minus the maximum deviation value for the first time);
step 1045, when the actual operating parameter reaches the difference of the first maximum value minus the maximum deviation value, controlling the power supply assembly to stop supplying the alternating current to the inductor 100;
in step 1046, when the actual operating parameter reaches the difference of the first maximum value minus the minimum deviation value, the power supply assembly is controlled to provide an alternating current to the inductor 100, and returns to step 1045.
In the induction heating-based temperature control method provided in the present embodiment, the predetermined value is set to the maximum deviation value. In the induction heating-based temperature control method provided in this embodiment, when the minimum deviation value is equal to zero, the temperature of the heat generating component 200 may be controlled between the first curie temperature and the first curie temperature plus a fourth predetermined value (positive number), where the fourth predetermined value is related to the selected maximum deviation value, for example, when the first curie temperature is 350 ℃, a suitable maximum deviation value is selected, and the temperature of the heat generating component 200 may be controlled between 350 ℃ and 358 ℃.
In the induction heating-based temperature control method provided in the present embodiment, when the minimum deviation value is greater than zero, the temperature of the heat generating component 200 may be controlled between the first curie temperature plus a fifth predetermined value (positive number) and the first curie temperature plus a sixth predetermined value (positive number), the magnitude of the fifth predetermined value being related to the magnitude of the selected minimum deviation value, and the magnitude of the sixth predetermined value being related to the magnitude of the selected maximum deviation value. For example, when the first curie temperature is 350 ℃, the temperature of the heat generating component 200 may be controlled between 355 ℃ and 360 ℃ by selecting an appropriate maximum deviation value.
In one embodiment, the minimum deviation value is equal to zero and the maximum deviation value is greater than zero; the step of controlling the alternating current of the power supply assembly such that the actual operating parameter remains between the difference of the first maximum value minus the maximum deviation value and the difference of the first maximum value minus the minimum deviation value after reaching the difference of the first maximum value and the predetermined value comprises:
step 1047, controlling the power supply assembly to supply the alternating current to the inductor 100 until the actual operating parameter reaches the first maximum value for the second time minus the maximum deviation value (e.g., when the operating parameter is impedance, i.e., until the actual operating parameter reaches a point t on the curve of the impedance over time in fig. 7);
step 1048, when the even number of times of the actual operation parameter reaches the difference value of the first maximum value minus the maximum deviation value, controlling the power supply assembly to stop supplying the alternating current to the inductor 100;
in step 1049, when the odd number of times of the actual operating parameter reaches the difference of the first maximum value minus the maximum deviation value, the power supply assembly is controlled to supply an alternating current to the sensor 100, and step 1048 is returned.
In the induction heating-based temperature control method provided in the present embodiment, the predetermined value is set to the maximum deviation value, and the temperature of the heat generating component 200 may be controlled between the first curie temperature minus a seventh predetermined value (positive number) and the first curie temperature plus the seventh predetermined value, and the magnitude of the seventh predetermined value is related to the magnitude of the selected maximum deviation value. For example, when the first curie temperature is 350 ℃, the temperature of the heat generating component 200 can be controlled between 340 ℃ and 360 ℃ by selecting a suitable maximum deviation value.
The foregoing description of the preferred embodiments of the present application is not intended to be limiting, but is intended to cover any and all modifications, equivalents, and alternatives falling within the spirit and principles of the present application.
Claims (10)
1. A temperature control method based on induction heating, characterized in that the temperature control method based on induction heating comprises:
providing alternating current to an inductor by adopting a power supply assembly, so that the inductor generates an alternating electromagnetic field;
the inductor is coupled with a heating component in an inductive mode, the heating component comprises a first heating element and a second heating element, the first heating element is arranged in close proximity, the first heating element has a first Curie temperature, and the second heating element has a second Curie temperature higher than the first Curie temperature;
acquiring a time-varying curve of an operating parameter of the inductor during the temperature rise of the heating component, and determining a first maximum value and a second maximum value of the operating parameter in the time-varying curve of the operating parameter, wherein the operating parameter comprises at least one of inductance, inductance and impedance, and the first maximum value is smaller than the second maximum value;
the temperature of the heat generating component is controlled by controlling the alternating current of the power supply component such that the actual operating parameter remains between the difference of the first maximum value minus the maximum deviation value and the difference of the first maximum value minus the minimum deviation value after the difference of the first maximum value minus the predetermined value is reached.
2. The induction heating-based temperature control method according to claim 1, wherein the minimum deviation value is greater than or equal to zero, and the maximum deviation value is greater than zero; the step of maintaining the actual operating parameter between the difference of the first maximum value minus the maximum deviation value and the difference of the first maximum value minus the minimum deviation value after reaching the difference of the first maximum value minus the predetermined value by controlling the alternating current of the power supply assembly comprises:
controlling the power supply assembly to supply alternating current to the inductor when the heating assembly is at room temperature until the actual operating parameter reaches the difference value of the first maximum value minus the minimum deviation value for the first time;
when the actual operating parameter reaches the difference value of the first maximum value minus the minimum deviation value, controlling the power supply assembly to stop supplying alternating current to the sensor;
when the actual operating parameter reaches the difference of the first maximum value minus the maximum deviation value, the power supply assembly is controlled to supply alternating current to the sensor, and the previous step is returned.
3. The induction heating-based temperature control method according to claim 1, wherein the minimum deviation value is greater than or equal to zero, and the maximum deviation value is greater than zero; the step of maintaining the actual operating parameter between the difference of the first maximum value minus the maximum deviation value and the difference of the first maximum value minus the minimum deviation value after reaching the difference of the first maximum value minus the predetermined value by controlling the alternating current of the power supply assembly comprises:
controlling the power supply assembly to supply alternating current to the inductor when the heating assembly is at room temperature until the actual operating parameter reaches the difference value of the first maximum value minus the maximum deviation value for the second time;
when the actual operating parameter reaches the difference of the first maximum value minus the maximum deviation value, controlling the power supply assembly to stop supplying alternating current to the sensor;
when the actual operating parameter reaches the difference value of the first maximum value minus the minimum deviation value, the power supply assembly is controlled to supply alternating current to the sensor, and the previous step is returned.
4. The induction heating-based temperature control method according to claim 1, wherein the minimum deviation value is equal to zero and the maximum deviation value is greater than zero; the step of maintaining the actual operating parameter between the difference of the first maximum value minus the maximum deviation value and the difference of the first maximum value minus the minimum deviation value after reaching the difference of the first maximum value minus the predetermined value by controlling the alternating current of the power supply assembly comprises:
controlling the power supply assembly to supply alternating current to the inductor when the heating assembly is at room temperature until the actual operating parameter reaches the difference value of the first maximum value minus the maximum deviation value for the second time;
when the even number of times of the actual operation parameter reaches the difference value of the first maximum value minus the maximum deviation value, controlling the power supply assembly to stop supplying alternating current to the inductor;
when the actual operation parameter reaches the difference value of the first maximum value minus the maximum deviation value for the odd number of times, the power supply assembly is controlled to supply alternating current to the sensor, and the previous step is returned.
5. The induction heating-based temperature control method according to claim 1, wherein the first heat generating member and the second heat generating member are each of a plate-like structure, and the first heat generating member and the second heat generating member are stacked.
6. The induction heating-based temperature control method according to claim 1, wherein the first heating element and the second heating element are both cylindrical structures, and the first heating element and the second heating element are mutually sleeved.
7. The induction heating-based temperature control method according to claim 1, wherein the first heating element has a columnar structure, the second heating element has a cylindrical structure, and the second heating element is sleeved on the periphery of the first heating element.
8. The induction heating-based temperature control method according to claim 1, wherein the inductor is a planar coil or a screw coil.
9. The induction heating-based temperature control method according to any one of claims 1 to 8, wherein the power supply assembly comprises a direct current power supply and an alternating current generator, the direct current power supply being configured to supply a direct voltage or a direct current to the alternating current generator; the alternating current generator is for generating the alternating current.
10. An induction heating-based heating system for implementing the induction heating-based temperature control method of any one of claims 1-9, the induction heating-based heating system comprising:
a power supply assembly for providing an alternating current;
an inductor for loading the alternating current and generating an alternating electromagnetic field;
a heat generating assembly inductively coupled to the inductor for heating the cigarette, the heat generating assembly including a first heat generating member having a first curie temperature and a second heat generating member having a second curie temperature higher than the first curie temperature disposed in close proximity;
the controller is electrically connected with the power supply assembly and used for controlling the opening and closing of the power supply assembly and the output power; and the controller is electrically connected with the inductor and is used for detecting the operation parameter of the inductor, wherein the operation parameter comprises at least one of inductance, inductive reactance or impedance.
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| CN202210809486.8A CN117413981A (en) | 2022-07-11 | 2022-07-11 | Temperature control method based on induction heating and heating system |
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| CN202210809486.8A CN117413981A (en) | 2022-07-11 | 2022-07-11 | Temperature control method based on induction heating and heating system |
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