CN112841753B - Heating element temperature control method, temperature control device and aerosol generating device - Google Patents
Heating element temperature control method, temperature control device and aerosol generating device Download PDFInfo
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- CN112841753B CN112841753B CN202011627505.2A CN202011627505A CN112841753B CN 112841753 B CN112841753 B CN 112841753B CN 202011627505 A CN202011627505 A CN 202011627505A CN 112841753 B CN112841753 B CN 112841753B
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- 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
Abstract
The inventionRelates to the field of temperature control of a heating element of an aerosol generating device, in particular to a temperature control method of the heating element, a temperature control device and an aerosol generating device. A temperature control method of a heating body comprises the following steps: obtaining the relation information of the highest temperature and time under the constant resistance value of the heating element; setting a target temperature T0(ii) a According to the relation information of the highest temperature and time under the constant resistance value of the heating body and the target temperature T0And controlling the temperature of the heating body. A temperature control device, the control device comprising: a storage unit and a control unit. An aerosol-generating device comprising a temperature control device. By adopting the above mode, the temperature control precision can be improved, so that a user can adjust the target temperature according to the requirement, the working efficiency is improved, and the user experience is improved.
Description
Technical Field
The invention relates to the field of temperature control of a heating element of an aerosol generating device, in particular to a temperature control method of the heating element, a temperature control device and an aerosol generating device.
Background
Compared with the traditional combustion type cigarette, the electronic baking tobacco can effectively reduce the harmful substances such as tar, carbon monoxide and the like, and the demand of the electronic cigarette tends to rise year by year as a substitute of the traditional combustion type cigarette. Electronic cured tobacco generally comprises a curing implement and an aerosol-generating substrate, such as a tobacco product. The curing device is used to cure tobacco products to produce an aerosol for the user to consume. The cooking appliance generally includes a heating assembly and a battery assembly. Wherein, battery pack is used for controlling heating element and for heating element power supply. The heating assembly includes a heating element that can heat the tobacco product to generate an aerosol for consumption by a user.
In order to achieve better taste during the baking of tobacco products, the temperature of the heating element is usually controlled by a controller, which provides different heating functions for the tobacco products at different stages, so as to achieve better atomization flavor or to control the temperature not to exceed a certain value so as to prevent damage to the atomization device or scald of the user.
In the case where the resistance value of the heating element is constant, the maximum temperature of the heating element is not constant but varies with the heating time. Therefore, it is a problem to be solved by those skilled in the art to continuously maintain the heating temperature of the heating element near a certain target value.
Disclosure of Invention
The invention provides a heating element temperature control method, a temperature control device and an aerosol generating device, which can provide different heating temperature values for a heating element in different heating time periods, so that the heating temperature of the heating element is continuously maintained near a certain target value.
A temperature control method of a heating body comprises the following steps:
obtaining the relation information of the highest temperature and time under the constant resistance value of the heating element;
set target temperature T0；
According to the relation information of the highest temperature and the time under the constant resistance value of the heating body and the target temperature T0And controlling the temperature of the heating body.
Further, the information on the relationship between the maximum temperature and time at the constant resistance value of the heating element is represented by the formula Tt ═ a/(b + t)2) Where Tt is an actual heat generation temperature of the heat generating element, a is a characteristic parameter of the heat generating element and is determined by a heat radiation characteristic of the heat generating element, b is a constant, and t is time.
Further, the value range of the a is 10-40.
Further, the relationship information of the maximum temperature and the time under the constant resistance value of the heating element and the target temperature T are obtained0The control of the temperature of the heating body is specifically as follows: according to the formula Tx-Tt-T0And controlling the temperature of the heating body, wherein Tx is the temperature required to be adjusted.
Further, the heating element is a 4-wire needle type heating element.
A temperature control device, the temperature control device comprising:
the storage unit is used for storing the relation information of the highest temperature and time under the constant resistance value of the heating element and the target temperature of the heating element;
a control unit for controlling the heating element according to the relation information of the maximum temperature and the time under the constant resistance value of the heating element and the target temperature T0And controlling the temperature of the heating body.
Further, the information on the relationship between the maximum temperature and time at the constant resistance value of the heating element is represented by the formula Tt ═ a/(b + t)2) Where Tt is an actual heat generation temperature of the heat generating element, a is a characteristic parameter of the heat generating element and is determined by a heat radiation characteristic of the heat generating element, b is a constant, and t is time.
Further, the relationship information of the maximum temperature and the time under the constant resistance value of the heating element and the target temperature T are obtained0For the hairThe temperature control of the hot body comprises the following specific steps: according to the formula Tx-Tt-T0And controlling the temperature of the heating body, wherein Tx is the temperature needing to be regulated.
Further, the heating element is a 4-wire needle type heating element.
An aerosol-generating device comprising a temperature control device.
According to the technical scheme provided by the invention, the heating temperature of the heating element is set by utilizing the relation between the highest temperature under the constant resistance value of the heating element and the time, so that the heating element can be controlled to be approximately kept near a certain target value in the heating process through different heating temperatures applied to the heating element, the temperature control precision is improved, a user can adjust the target temperature according to the requirement, the working efficiency is improved, and the user experience is improved.
Drawings
FIG. 1a is a measured temperature curve of a heating element with time;
FIG. 1b is a schematic temperature measurement curve of a heating element with time;
FIG. 2 is a flow chart of a method for controlling temperature of a heating element according to an embodiment of the present invention;
FIG. 3 is a measured temperature curve of a heating element using the temperature control method according to the embodiment of the present invention;
fig. 4 is a schematic diagram of a temperature control device.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In the embodiment of the present invention, a 4-wire needle type heating element having a long temperature measuring film is used as an example. When a 4-wire needle type heating element with a longer temperature measuring film is used, the highest temperature of the heating element is not constant under the condition that the resistance value of the heating element is the same, and the highest temperature changes along with the change of heating time. As shown in FIG. 1a, the measured change curve of the heat generation temperature and the heating time of the 4-wire needle type heating element is shown. The measured variation curve of fig. 1a can be summarized as the temperature curve diagram shown in fig. 1 b. As can be seen from fig. 1a and 1b, the heat generation temperature of the heat generating element gradually decreases with time, and gradually stabilizes around a certain temperature value after a long time, i.e., about 100 seconds or more.
In order to continuously control the maximum temperature of the heating element during operation to be close to a certain target value, it takes a lot of time to adjust the design value of the temperature curve, that is, different control temperature values are designed in different heating time periods to ensure that the actual maximum temperature of the heating element is stabilized to be close to a certain target value. In general, the actual operating temperature curve of the heating element is not consistent with the designed control temperature curve, and the difference is very large, the actual operating temperature curve is usually required to be a substantially horizontal straight line, and the designed control temperature curve is a curve which changes along with the change of heating time. When the actual heating temperature of the heating element needs to be modified, a large amount of time is needed to design the control temperature curve value. Although the redesigned control temperature curve can also adjust the actual heating temperature of the heating element, the actual operating temperature of the heating element after the control temperature curve is redesigned still has a relatively large deviation from the target value.
According to the embodiment of the invention, the temperature is controlled according to the characteristics of the heating element by mastering the characteristics of the heating element, so that the effect of accurate temperature control is achieved.
As shown in fig. 2, a method for controlling temperature of a heating element provided in an embodiment of the present invention includes:
s201, obtaining relation information of the highest temperature and time under the constant resistance value of the heating element. In the present example, a 4-wire needle type heating element was used as the heating element, and as shown in FIGS. 1a and 1b, the relationship between the maximum temperature at the constant resistance of the heating element and time was represented by Tt ═ a/(b + t)2) Wherein, Tt is the actual temperature of the heating element, a is determined by the heat dissipation characteristic of the heating element, and is obtained by heating the heating element and then measuring the temperature, and in general, the value of a is between 10 and 40; b is a constant, and in the embodiment of the invention, b is 1; t is time, typically in seconds；
S202, setting a target temperature T0；
In general, the target temperature may be determined according to the performance that the product is required to achieve. For example, in order to achieve a better taste of the baked tobacco product, the actual heating temperature of the heating element needs to be about 350 ℃, and 350 ℃ can be set as a target temperature value. It should be understood by those skilled in the art that the embodiment of the present invention is illustrated with 350 ℃ only, and is not intended to limit the target temperature value in the actual product design.
S203, according to the relation information of the highest temperature and the time under the constant resistance value of the heating element and the target temperature T0And controlling the temperature of the heating body.
And adjusting the actual power of the heating element according to the heating time length and the target temperature of the heating element. Power regulation may be achieved by adjusting the duty cycle.
The following exemplifies an actual control process. For example, when it is necessary to always control the target temperature of the heating element to T0Around 350 ℃, this can be done: the design value of the temperature profile is set to 350 ℃ which is constant and then a/(b + t) is determined according to the formula Tt2)+T0And obtaining the actual temperature at a certain moment. When T is0At 350 ℃, the formula is Tt ═ a/(b + t)2) +350 ℃ to obtain the actual temperature at a certain moment. In order to adjust the actual temperature to 350 ℃, Tx needs to be adjusted down when the temperature value is adjusted, wherein Tx is ttt-350 is a/(b + t)2). As shown in FIG. 3, the heat generation temperature of the heat generating body controlled according to the above-described control method is maintained substantially around a constant target value as can be seen from the figure.
By the control method of the embodiment, after the parameters a and b are confirmed, when the control method is actually used, what temperature curve is needed for the actual heating temperature of the heating element, the corresponding temperature curve can be designed according to the parameters, and the finally measured temperature curve is highly consistent with the designed temperature curve without adjusting the temperature design value in time, so that the development efficiency is greatly improved, and the development time is shortened. Meanwhile, the relation between the actual heating temperature of the heating element and the time is determined, so that the temperature control precision is greatly improved.
As shown in fig. 4, the embodiment of the present invention further provides a temperature control apparatus 400, where the temperature control apparatus 400 includes a storage unit 401 and a control unit 402. Wherein, the storage unit 401 stores the relationship information of the highest temperature and time under the constant resistance value of the heating element, and the control unit 402 is used for storing the relationship information of the highest temperature and time under the constant resistance value of the heating element and the target temperature T0And controlling the temperature of the heating body.
In an alternative embodiment, the information on the relationship between the maximum temperature and the time at the constant resistance value of the heat-generating body is represented by the formula Tt ═ a/(b + t)2) Wherein Tt is the actual heating temperature of the heating element, a is the characteristic parameter of the heating element, which is determined by the heat dissipation characteristic of the heating element, and the value range is 10-40, b is a constant, and in an optional embodiment, the value of b is 1.
In an alternative embodiment, the heat-generating body is a 4-wire needle type heat-generating body.
Embodiments of the present invention also provide an aerosol-generating device comprising a temperature control device as described in the above embodiments.
According to the embodiment of the invention, the heating temperature of the heating element is set by utilizing the relation between the highest temperature under the constant resistance value of the heating element and the time, so that the heating element can be controlled to be approximately kept near a certain target value in the heating process through different heating temperatures applied to the heating element, the temperature control precision is improved, a user can adjust the target temperature according to the requirement, the working efficiency is improved, and the user experience is improved.
Claims (8)
1. A temperature control method of a heating body is characterized by comprising the following steps:
obtaining the relation information of the highest temperature and time under the constant resistance value of the heating element;
setting a target temperature T0；
According to the relation information of the highest temperature and the time under the constant resistance value of the heating body, the sumThe target temperature T0Controlling the temperature of the heating body, specifically: according to the formula Tx-Tt-T0And controlling the temperature of the heating body, wherein Tx is the temperature needing to be regulated.
2. A temperature controlling method of a heat-generating body as described in claim 1, characterized in that information on relationship between maximum temperature under constant resistance of said heat-generating body and time is represented by the formula Tt ═ a/(b + t)2) Where Tt is an actual heat generation temperature of the heat generating element, a is a characteristic parameter of the heat generating element and is determined by a heat radiation characteristic of the heat generating element, b is a constant, and t is time.
3. A heating element temperature control method as claimed in claim 2, wherein a is in a range of 10 to 40.
4. A heating element temperature controlling method as described in any one of claims 1 to 3, characterized in that said heating element is a 4-wire needle type heating element.
5. A temperature control apparatus, characterized in that the temperature control apparatus comprises:
the storage unit is used for storing the relation information of the highest temperature and time under the constant resistance value of the heating element and the target temperature of the heating element;
a control unit for controlling the heating element according to the relation information of the maximum temperature and the time under the constant resistance value of the heating element and the target temperature T0Controlling the temperature of the heating body, specifically: according to the formula Tx-Tt-T0And controlling the temperature of the heating body, wherein Tx is the temperature needing to be regulated.
6. The temperature control device according to claim 5, wherein the information on the relationship between the maximum temperature of the heating element under the constant resistance and the time is represented by the formula Tt ═ a/(b + t)2) Wherein Tt is an actual heat generation temperature of the heat generating element, and a is a characteristic parameter of the heat generating elementThe heat dissipation characteristic of the thermal body is determined, b is a constant, and t is time.
7. A temperature control apparatus according to claim 5 or 6, wherein the heat generating body is a 4-wire needle type heat generating body.
8. An aerosol-generating device comprising a temperature control device as claimed in any of claims 5 to 7.
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