Accurate temperature control method and electronic atomization device

Abstract

The invention relates to a precise temperature control method and an electronic atomization device.According to the precise temperature control method, the initial environment temperature before use and the initial resistance value of a heating element are detected firstly, and then the current environment temperature and the current resistance value of the heating element in a dormant state after use are detected; and whether the offset between the initial resistance value and the current resistance value is within a preset offset range is compared, and whether the resistance value of the heating element is automatically calibrated or not is determined according to a comparison result. The resistance value of the heating element is automatically calibrated, so that the detected temperature is correctly calibrated, normal work can be ensured even if the heating element is damaged and the resistance value is changed, the output temperature is stable, and the taste and the smoke amount are stable.

Description

Technical Field

[0001] The present invention relates to the technical field of cigarette substitutes, and in particular to a precise temperature control method and an electronic atomization device. Background Art

[0002] An electronic atomizer is an electronic product that imitates cigarettes and can atomize tobacco oil into smoke for users to inhale. Due to the similar taste and convenience of inhalation as cigarettes, electronic atomizers have been rapidly promoted and used.

[0003] Existing electronic atomization devices generally include a battery host and an atomizer. The atomizer is the smoke generating part of the electronic atomization device. The atomizer stores smoke oil, and high temperature will cause the smoke oil to atomize and form smoke. The battery host is the control center and power supply part of the electronic atomization device. Existing atomizers atomize smoke oil, which must make the heating element contact with the smoke oil to achieve the effect of high-temperature atomization of the smoke oil. In order to obtain a stable taste, the heating element must be kept at a constant temperature and power, and the program is written according to the resistance stability of the heating element to achieve the effect of precise temperature control.

[0004] But in fact, the heating elements of existing temperature control products will be damaged during the contact with the e-liquid, which will cause the resistance of the heating elements to change, usually reflected in the increase of resistance, which will cause the temperature calculated by the temperature control calculation method to be inaccurate, and then cause the calculated temperature to be too high, and the power required to reach the target temperature is too small, which may result in too little smoke. Summary of the invention

[0005] Based on this, it is necessary to provide a precise temperature control method and electronic atomization device with self-calibration of heating element resistance, stable output temperature, stable taste and smoke volume to address the above problems.

[0006] A precise temperature control method, applied to an electronic atomization device, comprises the following steps:

[0007] S10: Detecting the initial resistance of the heating element. Before the electronic atomization device is used, the initial resistance R0 of the heating element at the ambient temperature T0 is detected;

[0008] S20: Detect the current ambient temperature. After the electronic atomization device is used and in a dormant state, detect the current ambient temperature T1;

[0009] S30: Detect the current resistance value of the heating element. When the ambient temperature is stable at T0 in S20, detect and record the current resistance value R1 of the heating element.

[0010] S40: Compare the offset between R0 and R1 with the preset offset a. If the offset falls within the preset offset a, continue to calculate the output power with R0 as the resistance value. If the offset does not fall within the preset offset a, calculate the output power with R1 as the resistance value.

[0011] In one embodiment, before detecting the current ambient temperature T1, the dormancy time t of the electronic atomization device is ≥ 1 hour.

[0012] In one embodiment, the electronic atomization device automatically detects the current ambient temperature T1 and the current resistance value R1 of the heating element every sleep time t.

[0013] In one embodiment, the current resistance R1 of the heating element under the current ambient temperature T1 is detected multiple times, and the current resistance R1 detected multiple times is compared with R0 to obtain an offset set, and the offsets in the offset set are compared with the preset offset a to determine the calculated resistance of the output power.

[0014] In one embodiment, before step S40, the method further includes the following steps:

[0015] S31: Determine the stability of the current ambient temperature T1 and the current resistance value R1 of the heating element, and calculate the extreme difference value T of the current ambient temperature T1 detected multiple times. c And the extreme value R of the current resistance R1 of the heating element tested multiple times c , and T c Compared with the preset extreme value b, R c Compared with the preset range value c; if T c Falling into the preset extreme value b, R c If the value falls within the preset range of the extreme value c, the data is stable and the heating element is automatically calibrated; if T c Does not fall within the preset extreme value b, R c If it does not fall within the preset range of the extreme value c, the data is unstable and the heating element will not be automatically calibrated.

[0016] In one embodiment, the preset offset a≤|8|mΩ, the preset extreme difference b≤|1|°C, and the preset extreme difference c≤|3|mΩ.

[0017] In one embodiment, the current resistance value R1 of the heating element at the current ambient temperature T1 is detected multiple times for no less than 8 times.

[0018] An electronic atomization device adopts the above-mentioned precise temperature control method.

[0019] In one embodiment, it includes an initial detection module, a current detection module and a comparison adjustment module, wherein:

[0020] The initial detection module is used to detect and save the ambient temperature T0 of the heating element before it is used, and the initial resistance value R0 of the heating element under T0;

[0021] The current detection module is used to detect and save the current resistance value R1 of the heating element at the ambient temperature T0 after use and in a dormant state;

[0022] The comparison calibration module is used to compare the offset obtained by |R1-R0| with the preset offset a, and determine whether to automatically calibrate the resistance of the heating element according to whether the offset falls within the preset offset a range, so as to calculate the output power.

[0023] In one embodiment, a judgment module is further included, wherein the judgment module is provided with a preset range value b and a preset range value c, the current detection module detects and records the current ambient temperature T1 and the current resistance value R1 under the current ambient temperature T1 for multiple times, obtains multiple T1 and multiple R1, and converts the range values ​​T1 of the multiple T1 into a preset range value c. c Compared with the preset range value b, the range values ​​R c Compare with the preset extreme value c to determine whether the extreme value falls within the range of the corresponding preset extreme value, and determine whether the comparison and calibration module performs automatic calibration of the heating element according to the judgment result.

[0024] The above-mentioned precise temperature control method and electronic atomization device have at least the following advantages:

[0025] This precise temperature control method first detects the initial ambient temperature and the initial resistance of the heating element before use, then detects the current ambient temperature and the current resistance of the heating element after use and in a dormant state, and then compares whether the offset between the initial resistance and the current resistance falls within the preset offset range, and determines whether to automatically calibrate the resistance of the heating element based on the comparison result. By automatically calibrating the resistance of the heating element, the detected temperature is calibrated correctly, ensuring that the device can work normally even if the resistance of the heating element is damaged and changes, and the output temperature, taste and smoke volume are stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the process flow of the precise temperature control method of the present invention;

[0027] Figure 2 This is a schematic block diagram of the electronic atomization device of the present invention.

[0028] Description: 10. Initial detection module; 20. Current detection module; 30. Judgment module; 40. Comparison and adjustment module. DETAILED DESCRIPTION

[0029] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific implementation disclosed below.

[0030] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element at the same time.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0032] See also Figure 1 , is a schematic diagram of the structure of an electronic atomization device in one embodiment.

[0033] A precise temperature control method, applied to an electronic atomization device, comprises the following steps:

[0034] S10: Detect the initial resistance of the heating element. Before the electronic atomization device is used, detect the initial resistance R0 of the heating element at the ambient temperature T0. The initial ambient temperature T0 is usually set to 25°C by default, that is, the factory setting is ambient temperature T0 and initial resistance R0.

[0035] S20: Detect the current ambient temperature. After the electronic atomization device is used and in a dormant state, detect the current ambient temperature T1; wherein, dormancy means that the electronic atomization device is not used, tested, charged or otherwise operated, and the electronic atomization device is in a static and unused state.

[0036] S30: Detect the current resistance of the heating element. When the ambient temperature is stable at T0 in S20, detect and record the current resistance R1 of the heating element. The current resistance R1 is the actual resistance of the heating element during measurement. It is possible that the heating element is corroded by the high-temperature atomization of the electronic atomization device and some components in the e-liquid, making R1 different from R0. Even the R1 detected at different times may be different due to the length of contact with the e-liquid and the length of time of high-temperature atomization. The e-liquid component that corrodes the heating element may be sugar.

[0037] S40: Compare the offset between R0 and R1 with the preset offset a. If the offset falls within the preset offset a range, the output power is calculated with R0 as the resistance value. If the offset does not fall within the preset offset a range, the output power is calculated with R1 as the resistance value. The output power is the output power required to maintain a constant temperature according to the different resistance values ​​of the heating element. It can be obtained through the PID algorithm. The PID algorithm, the full name of the proportional-integral-derivative control algorithm, is a common "maintain stability" control algorithm widely used in industrial control systems. It adjusts the output of the control system through three main components to reduce system errors and achieve stable control.

[0038] This precise temperature control method first detects the initial ambient temperature and the initial resistance of the heating element before use, then detects the current ambient temperature and the current resistance of the heating element after use and in a dormant state, and then compares whether the offset between the initial resistance and the current resistance falls within the preset offset range, and determines whether to automatically calibrate the resistance of the heating element based on the comparison result. By automatically calibrating the resistance of the heating element, the detected temperature is calibrated correctly, ensuring that the device can work normally even if the resistance of the heating element is damaged and changes, and the output temperature, taste and smoke volume are stable.

[0039] In this embodiment, before detecting the current ambient temperature T1, the dormancy time t of the electronic atomization device is ≥ 1 hour. In order to ensure the stability of the detection results and the accuracy of the automatic calibration of the heating element, it is necessary to ensure that the current ambient temperature T1 is within the preset allowable range from the initial ambient temperature T0, otherwise it will cause misjudgment, resulting in incorrect resistance calibration, and the purpose of precise constant temperature output control cannot be achieved. The dormancy time t ≥ 1 hour can ensure that the electronic atomization device can be completely cooled after use, so that the current ambient temperature T1 meets the detection requirements, so that the data obtained by the detection is stable and available. On the other hand, the dormancy time t ≥ 1 hour can avoid frequent detection of the ambient temperature, which causes the battery of the electronic atomization device to be used too quickly, resulting in insufficient power during the suction process, affecting the suction experience. Of course, if the battery is not used too quickly, the dormancy time t before detection can also be < 1 hour, as long as it can ensure that the current ambient temperature T1 meets the detection requirements.

[0040] Preferably, the electronic atomization device automatically detects the current ambient temperature T1 and the current resistance R1 of the heating element every sleep time t; that is, t is used as the sleep cycle, and the current ambient temperature T1 and the current resistance R1 of the heating element can be detected every sleep cycle, regardless of whether the electronic atomization device has been used after the last sleep cycle; this can prevent the sugar and other components in the e-liquid from further micro-corroding the heating element during the sleep time and changing the resistance of the heating element, so that the detection result is more accurate and the constant temperature control is more precise.

[0041] In this embodiment, the current resistance value R1 of the heating element under the current ambient temperature T1 is detected multiple times, and the current resistance value R1 detected multiple times is compared with R0 to obtain an offset set, and the offsets in the offset set are compared with the preset offset a to determine the calculated resistance value of the output power. In order to ensure the accuracy of the detection results, the results of multiple detections are compared with R0 to obtain an offset set, which can avoid the inaccurate results that may be caused by a single detection. By comparing the offsets in the offset set with the preset offset a, it can be confirmed whether the output power is calculated based on R0 or R1 according to whether it falls within the range of the preset offset a, so as to obtain the output power according to the demand for outputting a constant temperature and using the PID algorithm to ensure the stability and accuracy of the constant temperature output when the resistance value of the heating element changes due to damage.

[0042] In this embodiment, before step S40, the following steps are further included:

[0043] S31: Determine the stability of the current ambient temperature T1 and the current resistance value R1 of the heating element, and calculate the extreme difference value T of the current ambient temperature T1 detected multiple times. c And the extreme value R of the current resistance R1 of the heating element tested multiple times c , and T c Compared with the preset extreme value b, R c Compared with the preset range value c; if T c Falling into the preset extreme value b, R c If the value falls within the preset range of the extreme value c, the data is stable and the heating element is automatically calibrated; if T c Does not fall within the preset extreme value b, R c If it does not fall within the preset range of the extreme value c, the data is unstable and the heating element will not be automatically calibrated.

[0044] By measuring the current ambient temperature T1 extreme difference value T c The maximum difference R of the multiple current resistance R1 of the heating element cCompare with the preset extreme value b and the preset extreme value c respectively, and judge whether it falls within the range of the preset extreme value b and the preset extreme value c, so as to determine whether the detected current ambient temperature and the current resistance value of the heating element are in a stable state. If it is in a stable state, the data is valid, and the next step S40 is performed according to the set procedure; if it is not in a stable state, the data is invalid, and the next step will not be entered, and the current ambient temperature and the current resistance value of the heating element will be re-tested after they are stable. Of course, the time for re-testing can be detected according to the sleep cycle, or it can be the time between two sleep cycles.

[0045] In this embodiment, the preset offset a≤|8|mΩ, the preset range value b≤|1|°C, and the preset range value c≤|3|mΩ are used to ensure the stability of the detection data. Only the data obtained under stable conditions can accurately calculate the output power to achieve precise constant temperature control.

[0046] Preferably, the current resistance value R1 of the heating element under the current ambient temperature T1 is detected multiple times for no less than 8 times to ensure the stability of the data.

[0047] See also Figure 2 The present application also provides an electronic atomization device, which adopts the above-mentioned precise temperature control method to ensure that when the heating element is damaged and the resistance value changes, the resistance value can be automatically calibrated, and precise constant temperature control and normal operation can be achieved, so that the user can get a stable taste and smoke volume. Since the electronic atomization device adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be repeated here.

[0048] In this embodiment, the electronic atomization device includes an initial detection module 10, a current detection module 20 and a comparison adjustment module 40, wherein:

[0049] The initial detection module 10 is used to detect and save the ambient temperature T0 of the heating element before it is used, and the initial resistance value R0 of the heating element under T0;

[0050] The current detection module 20 is used to detect and save the current resistance value R1 of the heating element at the ambient temperature T0 after use and in a dormant state;

[0051] The comparison calibration module is used to compare the offset obtained by |R1-R0| with the preset offset a, and determine whether to automatically calibrate the resistance of the heating element according to whether the offset falls within the preset offset a range, so as to calculate the output power.

[0052] The electronic atomization device includes an atomizer and a battery host. The atomizer is a smoke generating device, and the battery host is a power supply and control center. The atomizer is adapted to the battery host. The initial detection module 10, the current detection module 20 and the comparison adjustment module 40 are integrated into the main control board in the battery host. The actions and judgments of the corresponding modules are controlled by the set program, and the corresponding detection, judgment and automatic calibration are completed at the corresponding time. After the resistance value of the heating element is damaged and changes, precise constant temperature control and normal operation can also be achieved. The heating element can be a heating wire, a heating net, a heating sheet, etc.

[0053] In this embodiment, the electronic atomization device further includes a judgment module 30, which is integrated into the main control board in the battery host. The judgment module 30 is provided with a preset range value b and a preset range value c. The current detection module 20 detects and records the current ambient temperature T1 and the current resistance value R1 under the current ambient temperature T1 for multiple times, obtains multiple T1 and multiple R1, and converts the range value T1 of multiple T1 into a preset range value c. c Compared with the preset range value b, the range values ​​R c Compare with the preset extreme value c to determine whether the extreme value falls within the corresponding preset extreme value range, and determine whether the comparison calibration module performs automatic calibration of the heating element based on the judgment result. c The maximum difference R of the multiple current resistance R1 of the heating element c Compare with the preset extreme value b and the preset extreme value c respectively, and judge whether it falls within the range of the preset extreme value b and the preset extreme value c, so as to determine whether the current ambient temperature and the current resistance of the heating element are in a stable state. If they are in a stable state, the data is valid, and the next step is performed according to the set procedure; if they are not in a stable state, the data is invalid, and the next step will not be entered. The current ambient temperature and the current resistance of the heating element will be retested after they are stable. Of course, the time for retesting can be based on the sleep cycle detection, or it can be the time between two sleep cycles.

[0054] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0055] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A precise temperature control method, applied to an electronic atomization device, characterized in that: The following steps are involved: S10: Detecting the initial resistance of the heating element. Before the electronic atomization device is used, the initial resistance R0 of the heating element at the ambient temperature T0 is detected; S20: Detect the current ambient temperature. After the electronic atomization device is used and in a dormant state, detect the current ambient temperature T1; S30: Detect the current resistance value of the heating element. When the ambient temperature is stable at T0 in S20, detect and record the current resistance value R1 of the heating element. S40: Compare the offset between R0 and R1 with the preset offset a. If the offset falls within the preset offset a, continue to calculate the output power with R0 as the resistance value. If the offset does not fall within the preset offset a, calculate the output power with R1 as the resistance value.

2. A precise temperature control method according to claim 1, characterized in that: Before detecting the current ambient temperature T1, the dormancy time of the electronic atomization device is t≥1 hour.

3. A precise temperature control method according to claim 2, characterized in that: The electronic atomization device automatically detects the current ambient temperature T1 and the current resistance value R1 of the heating element every sleep time t.

4. A precise temperature control method according to claim 2, characterized in that: The current resistance R1 of the heating element under the current ambient temperature T1 is detected multiple times, and the current resistance R1 detected multiple times is compared with R0 to obtain an offset set, and the offsets in the offset set are compared with the preset offset a to determine the calculated resistance of the output power.

5. A precise temperature control method according to claim 4, characterized in that: Before step S40, the method further includes the following steps: S31: Determine the stability of the current ambient temperature T1 and the current resistance value R1 of the heating element, and calculate the extreme difference value T of the current ambient temperature T1 detected multiple times. c And the extreme value R of the current resistance R1 of the heating element tested multiple times c , and T c Compared with the preset extreme value b, R c Compared with the preset range value c; if T c Falling into the preset extreme value b, R c If the value falls within the preset range of the extreme value c, the data is stable and the heating element is automatically calibrated; if T c Does not fall within the preset extreme value b, R c If it does not fall within the preset range of the extreme value c, the data is unstable and the heating element will not be automatically calibrated.

6. A precise temperature control method according to claim 5, characterized in that: The preset offset a≤|8|mΩ, the preset extreme difference b≤|1|°C, and the preset extreme difference c≤|3|mΩ.

7. A precise temperature control method according to claim 6, characterized in that: The current resistance value R1 of the heating element under the current ambient temperature T1 is detected multiple times for no less than 8 times.

8. An electronic atomization device, characterized in that: The precise temperature control method according to any one of claims 1 to 6 is adopted.

9. The electronic atomization device according to claim 8, characterized in that: It includes an initial detection module, a current detection module and a comparison adjustment module, wherein: The initial detection module is used to detect and save the ambient temperature T0 of the heating element before it is used, and the initial resistance value R0 of the heating element under T0; The current detection module is used to detect and save the current resistance value R1 of the heating element at the ambient temperature T0 after use and in a dormant state; The comparison calibration module is used to compare the offset obtained by |R1-R0| with the preset offset a, and determine whether to automatically calibrate the resistance of the heating element according to whether the offset falls within the preset offset a range, so as to calculate the output power.

10. An electronic atomization device according to claim 9, characterized in that: The present invention also includes a judgment module, wherein the judgment module is provided with a preset extreme difference value b and a preset extreme difference value c, and the current detection module detects and records the current ambient temperature T1 and the current resistance value R1 under the current ambient temperature T1 for multiple times, obtains multiple T1 and multiple R1, and converts the extreme difference values ​​T1 of multiple T1 into c Compared with the preset range value b, the range values ​​R c Compare with the preset extreme value c to determine whether the extreme value falls within the range of the corresponding preset extreme value, and determine whether the comparison and calibration module performs automatic calibration of the heating element according to the judgment result.

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