Heating assembly, electronic atomization device, and method for controlling the heating assembly

Abstract

This application provides a heating assembly, an electronic atomizing device and a method for controlling a heating assembly. The heating assembly includes a heating element and a control unit, the control unit is used to detect a current resistance value of the heating element at a current time of a heating stage and determine a target resistance value corresponding to a current target temperature, and in response to the current resistance value being greater than the target resistance value and the difference between the current resistance value and the target resistance value being equal to or greater than a preset threshold, the control unit opens a path between the assembly battery connected to the heating assembly and the heating element during a first time period, and in response to the current resistance value being greater than the target resistance value and the difference between the current resistance value and the target resistance value being less than a preset threshold, opens a path between the battery assembly and the heating element during a second time period, where the second time period is longer than the first time period. By controlling the heating time, the temperature of the heating element is maintained at the target temperature and the atomization effect is reliably guaranteed.

Description

[Technical Field]

[0001] (CROSS-REFERENCE TO RELATED APPLICATIONS) This application claims priority from a Chinese patent application having application number 202111011140.5, filed on August 31, 2021, the entire contents of which are incorporated herein by reference.

[0002] TECHNICAL FIELD This application relates to the technical field of electronic atomization devices, and in particular to a heating assembly, an electronic atomization device, and a method for controlling the heating assembly. [Background technology]

[0003] The electronic atomization device is used to atomize the atomization substrate, which can be used in various fields, for example, by burning a solid substrate of plant leaves with a specific fragrance in a non-combustion manner, the solid substrate of the leaves is burned to form an aerosol, and ingredients such as fragrances can be added to the plant leaves, and the plant leaves and ingredients such as fragrances can be simultaneously burned and mixed into the aerosol, thereby imparting a desired fragrance to the aerosol.

[0004] Conventional electronic atomization devices generally include a battery assembly and a heating assembly, where the heating assembly includes an atomization substrate and a heating element, and the battery assembly controls the power supply to the heating element, so that the heating element can heat and atomize the atomization substrate.

[0005] However, in the heating atomization process of conventional electronic atomizers, if the temperature of the heating element is too high, the aerosol after atomization will have a burnt smell, or if the temperature of the heating element is too low, the atomization substrate cannot be sufficiently heated to atomize, resulting in poor atomization efficiency. Summary of the Invention [Problem to be solved by the invention]

[0006] In view of this, the present application provides a heating assembly, an electronic atomization device and a method for controlling the heating assembly, which can effectively control the temperature of the heating element and ensure the atomization effect. [Means for solving the problem]

[0007] In order to solve the above technical problems, a first technical solution provided by this application is as follows: A heating assembly is provided, the heating assembly including a heating element and a control unit, wherein the control unit is used to detect a current resistance value of the heating element at a current time during a heating stage and determine a target resistance value corresponding to a current target temperature, wherein in response to the current resistance value being greater than the target resistance value and a difference between the current resistance value and the target resistance value being equal to or greater than a preset threshold, the control unit opens a path between a battery assembly connected to the heating assembly and the heating element during the first time period, such that the heating element is driven to heat during the first time period, and in response to the current resistance value being greater than the target resistance value and a difference between the current resistance value and the target resistance value being less than the preset threshold, the control unit opens a path between the battery assembly and the heating element during the second time period, such that the heating element is driven to heat during the second time period, wherein the second time period is longer than the first time period.

[0008] Here, the control unit is further used to conduct a path between the battery assembly and the heating element during a third time period in response to the current resistance value being equal to or less than the target resistance value, such that the heating element is driven and heated during the third time period, wherein the third time period is longer than the second time period.

[0009] Here, there is one cutoff time between two adjacent first time periods, two adjacent second time periods, two adjacent third time periods, adjacent first and second time periods, adjacent first and third time periods, or adjacent second and third time periods, and the cutoff time is not changed.

[0010] Here, the heating assembly further includes a switch unit, the switch unit being installed in a passage between the heating element and the battery assembly, and the control unit being connected to the switch unit and controlling the switch unit to be turned on so as to conduct the passage between the battery assembly and the heating element during the first time period, the second time period, or the third time period.

[0011] Here, the heating element includes a heat generating unit and a temperature measuring unit, the heat generating unit is connected to the battery assembly through a switch unit, and the temperature measuring unit is connected to the heat generating unit. In parallel the heating assembly is connected to the control unit such that the control unit detects a current resistance value of the heating element by the temperature measurement unit, the heating assembly further includes a sampling unit, the sampling unit is connected in series with the temperature measurement unit, and the control unit is connected to the control unit such that the control unit detects a current flowing through the sampling unit and the temperature measurement unit via the sampling unit and determines a resistance value of the temperature measurement unit, wherein the resistance value of the temperature measurement unit characterizes a current resistance value of the heating element.

[0012] Here, the first time zone, the second time zone, and the third time zone are adjustable.

[0013] Here, the control unit includes a proportional-integral-derivative controller (PID controller) for adjusting the first time period, the second time period or the third time period based on the unchanged cutoff time, the current resistance value and the target resistance value.

[0014] wherein a first ratio between the first time period and the first time sum is adjustable, wherein the first ratio is greater than 0 and less than or equal to 99.9%, and the first time sum is the sum of the first time period and the cutoff time, and / or a second ratio between the second time period and the second time sum is adjustable, wherein the second ratio is greater than 0 and less than or equal to 99.9%, and the second time sum is the sum of the second time period and the cutoff time, and / or a third ratio between the third time period and the third time sum is adjustable, wherein the third ratio is greater than 0 and less than or equal to 99.9%, and the third time sum is the sum of the third time period and the cutoff time.

[0015] Here, the control unit detects the current resistance value of the heating element at the current cut-off time.

[0016] Here, the target temperature of the heating element at the current time is determined based on a preset temperature-time curve of the heating element in the heating stage, and the target resistance value corresponding to the target temperature is determined based on a preset temperature-resistance relationship table.

[0017] In order to solve the above technical problems, the present application provides a second technical solution as follows: A control method for a heating assembly is provided, the control method for a heating assembly includes: detecting a current resistance value of a heating element at a current time during a heating stage, and determining a target resistance value corresponding to a current target temperature; in response to the current resistance value being greater than the target resistance value and a difference between the current resistance value and the target resistance value being equal to or greater than a preset threshold, a control unit conducting a path between a battery assembly connected to the heating assembly and the heating element during a first time period, such that the heating element is driven to heat during the first time period; in response to the current resistance value being greater than the target resistance value and a difference between the current resistance value and the target resistance value being less than the preset threshold, the control unit conducting a path between the battery assembly and the heating element during a second time period, such that the heating element is driven to heat during the second time period, where the second time period is longer than the first time period.

[0018] In order to solve the above technical problems, the third technical solution provided by this application is as follows: An electronic atomization device is provided, which includes a heating assembly and a battery assembly, the heating assembly includes any one of the heating assemblies described above, and the battery assembly supplies power to the heating assembly.

[0019] The beneficial effect of the present application, unlike the prior art, is that the present application provides a heating assembly including a heating element and a control unit. The control unit detects a current resistance value of the heating element during a heating phase and determines a target resistance value corresponding to the current target temperature. In response to the current resistance value being greater than the target resistance value and the difference between the current resistance value and the target resistance value being equal to or greater than a preset threshold, the control unit opens a path between the heating element and a battery assembly connected to the heating assembly during the first time period, so that the heating element is activated and heated during the first time period. In response to the current resistance value being greater than the target resistance value and the difference between the current resistance value and the target resistance value being less than the preset threshold, the control unit opens a path between the battery assembly and the heating element during the second time period, so that the heating element is activated and heated during the second time period, the second time period being longer than the first time period. By controlling the heating time, the temperature of the heating element can be effectively controlled and the atomization effect can be ensured. [Brief explanation of the drawings]

[0020] In order to more clearly describe the technical solutions in the embodiments of the present application, the following briefly describes the drawings that need to be used in the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. Those skilled in the art can obtain other drawings from these drawings without any creative efforts. [Figure 1] 1 is a schematic diagram of a functional module of a heating assembly provided by one embodiment of the present application. [Figure 2] FIG. 10 is a timing diagram of the switch unit. [Figure 3]FIG. 1 is a schematic circuit diagram of a heating assembly provided by one embodiment of the present application. [Figure 4] 2 is a logic diagram of a control unit control method provided by one embodiment of the present application; [Figure 5] 1 is a schematic flow chart of a method for controlling a heating assembly according to one embodiment of the present application. [Figure 6] 4 is a schematic flowchart of a method for controlling a heating assembly according to another embodiment of the present application. [Figure 7] 1 is a schematic structural diagram of an electronic atomization device provided in accordance with one embodiment of the present application; DETAILED DESCRIPTION OF THE INVENTION

[0021] The technical solutions of the embodiments of the present application will be described clearly and completely below with reference to the drawings of the embodiments of the present application, and it is obvious that the following embodiments are only some of the embodiments of the present application, but not all of them. Based on the embodiments of the present application, all other embodiments that a person skilled in the art can obtain without inventive efforts fall within the protection scope of the present application.

[0022] 1, which is a functional module schematic diagram of a heating assembly according to one embodiment of the present application. Specifically, the heating assembly 10 includes a heating element 11 and a control unit 12. The control unit 12 controls the operation of the heating element 11 to atomize the atomized substrate.

[0023] Specifically, the control unit 12 detects the current resistance Rx of the heating element 11 during the heating phase and determines the target resistance Rt corresponding to the current target temperature. The heating time of the heating element 11 is controlled based on the relationship between the current resistance Rx and the target resistance Rt. As can be understood, in practical applications, the higher the resistance, the higher the temperature. Therefore, if the current resistance Rx is greater than the target resistance Rt, it can be determined that the temperature corresponding to the current resistance Rx is greater than the temperature corresponding to the target resistance Rt.

[0024] 2 , in one embodiment, if the current resistance value Rx is greater than the target resistance value Rt, and the difference between the current resistance value Rx and the target resistance value Rt is equal to or greater than a preset threshold, the control unit 12 opens a path between the battery assembly 20 connected to the heating assembly 10 and the heating element 11 during a first time period T1, thereby powering the heating element 11 to heat during the first time period T1. If the current resistance value Rx is greater than the target resistance value Rt, and the difference between the current resistance value Rx and the target resistance value Rt is less than the preset threshold, the control unit 12 opens a path between the battery assembly 20 and the heating element 11 during a second time period T2, thereby powering the heating element 11 to heat during the second time period T2, where the second time period T2 is longer than the first time period T1.

[0025] Specifically, if the temperature corresponding to the current resistance value Rx is the current temperature and the temperature corresponding to the target resistance value Rt is the current target temperature, i.e., if the current temperature is higher than the current target temperature and the temperature difference between the current temperature and the current target temperature is large, the current temperature needs to be lowered, and at this time the heating element 11 is heated for a relatively short time, for example, a first time period T1. If the current temperature is higher than the current target temperature and the temperature difference between the current temperature and the current target temperature is small, the heating element 11 is heated for a relatively long time, for example, a second time period T2.

[0026] Specifically, a temperature-resistance relationship table and a temperature-time curve are stored in advance. When detecting a current resistance value Rx corresponding to a current point, the current temperature corresponding to the current resistance value Rx is determined based on the temperature-resistance relationship table. Furthermore, the target temperature corresponding to the current point can be obtained based on the time of the current point and the temperature-time curve. Furthermore, the target resistance value Rt corresponding to the target temperature can be determined from the temperature-resistance relationship table based on the target temperature.

[0027] It can be understood that when the control unit 12 detects that the current resistance Rx of the heating element 11 at the current point is greater than the target resistance Rt at the current point, and the difference between the current resistance Rx and the target resistance Rt is greater than or equal to a preset threshold, the temperature of the heating element 11 is high, and the heating element 11 can continue to heat the atomization substrate for a certain period of time. However, to ensure that the heating effect of the heating element 11 is maintained, the heating element 11 only needs to be heated for a shorter period of time. When the difference between the current resistance Rx and the target resistance Rt of the heating element 11 is less than the preset threshold, the heating effect of the heating element 11 is not ideal, and some of the atomization substrate may not be sufficiently heated. Therefore, the heating element 11 needs to be heated for a longer period of time to ensure that the temperature of the heating element 11 sufficiently heats the atomization substrate, and the temperature of the heating element can be effectively controlled, avoiding phenomena such as the occurrence of a burnt odor due to excessively high temperature, and ensuring the atomization effect.

[0028] In one embodiment, when the current resistance value Rx is equal to or less than the target resistance value Rt, the control unit 12 also opens the path between the battery assembly 20 and the heating element 11 during the third time period T3, so that the heating element 11 is activated to heat during the third time period T3. Here, the third time period T3 is longer than the second time period T2. As can be seen, if the current actual resistance value of the heating element 11 is lower than the target resistance value Rt, the heating element 11 cannot sufficiently heat the atomization substrate. In this case, it is necessary to ensure that the actual temperature of the heating element 11 not only meets the target temperature requirement, but also exceeds the sum of the target temperature and the preset threshold value. Therefore, the heating time during the third time period T3 is longer than the second time period T2.

[0029] In order to prevent the temperature of the heating element 11 from becoming too high due to prolonged heating and damaging the heating element 11 and other elements, in one embodiment, a cut-off time T is provided between two adjacent first time periods T1, two adjacent second time periods T2, two adjacent third time periods T3, adjacent first time periods T1 and second time periods T2, adjacent second time periods T2 and third time periods T3, or adjacent second time periods T2 and third time periods T3. At the cut-off time T, the control unit 12 controls the battery assembly 20 to cut off the path between the battery assembly 20 and the heating element 11, so that the battery assembly 20 does not heat the heating element 11. heating element The atomization substrate is continuously heated and atomized using the residual heat remaining in the first time period T1, the second time period T2, or the third time period T3, and as can be understood, the cutoff time T is fixed and does not change. That is, at each cutoff time T, heating element The change in resistance of the heating element 11 is the same, and the change in temperature is also the same. Furthermore, since the actual temperature of the heating element 11 is lower than the target temperature at the cutoff time T, the control unit 12 can control the heating time of the heating element 11 in the next heating cycle based on the decreasing temperature of the heating element 11 within the cutoff time T and the actual temperature of the heating element 11 detected in the previous heating cycle, so that the actual temperature of the heating element 11 in the next heating cycle can sufficiently heat the atomization substrate.

[0030] By setting a constant cut-off time T between two adjacent heating cycles, on the one hand, it is possible to prevent the heating element 11 from overheating and damaging the heating element 11 and other elements, and on the other hand, it is possible to improve the energy conversion efficiency and increase the operating life of the electronic atomization device.

[0031] 3 is a circuit schematic diagram of a heating assembly according to an embodiment of the present application, in which the heating assembly 10 further includes a switch unit 121, which is installed in the passage between the heating element 11 and the battery assembly 20. Here, the control unit 12 is connected to the switch unit 121 and controls the switch unit 121 to be on, thereby opening the passage between the battery assembly 20 and the heating element 11 in the first time period T1, the second time period T2, or the third time period T3, so that the heating element 11 can heat and atomize the atomized gas.

[0032] In one embodiment, the heating element 11 includes a heating unit R1 and a temperature measuring unit R2. The heating unit R1 is connected to the battery assembly 20 via a switch unit 121. When the switch unit 121 is turned on, the battery assembly 20 supplies power to the heating unit R1, causing the heating unit R1 to generate heat and atomize the atomization substrate. The temperature measuring unit R2 is connected in parallel with the heating unit R1 and to the control unit 12, so that the control unit 12 detects the current resistance value Rx of the heating unit R1 through the temperature measuring unit R2. In one embodiment, the switch unit 21 is a MOS transistor.

[0033] The heating assembly 10 further includes a sampling unit R3. The sampling unit R3 is connected in series with the temperature measuring unit R2 and is connected to the control unit 12. The control unit 12 detects the current flowing through the sampling unit R3 and the temperature measuring unit R2 via the sampling unit R3 and determines the resistance of the temperature measuring unit R2. The resistance of the temperature measuring unit R2 characterizes the current resistance Rx of the heating element 11. As can be understood, the current actual resistance of the temperature measuring unit R2 is the current actual resistance of the heating element 11. Specifically, the control unit 12 can detect the current I3 flowing through the sampling unit R3, and since the resistance of the sampling unit R3 is known, the voltage V1 of the sampling unit R3 can be calculated. Based on the principle of voltage division in a series circuit, the voltage V2 of the temperature measuring unit R2 is obtained by subtracting the voltage V1 of the sampling unit R3 from the voltage of the battery assembly 20. Then, the current resistance of the temperature measuring unit R2 can be calculated using the resistance calculation formula (1): Then, the resistance value of the temperature measuring unit R2 characterizes the current resistance value Rx of the heating element 11, so that the current resistance value Rx of the heating element 11 can be obtained. Next, the control unit 12 compares the current resistance value Rx of the temperature measuring unit at the current point with the target resistance value Rt corresponding to the target temperature at the current point and the preset threshold value, thereby driving the battery assembly 20 to heat the heating element 11 in the first time period T1, the second time period T2, or the third time period T3.

[0034] JPEG0007738173000001.jpg18170

[0035] In one embodiment, the first time period T1, the second time period T2, and the third time period T3 are adjustable. Figure 4 is a logic diagram of a control method of a control unit according to an embodiment of the present application. When the switch unit 121 is turned off, the control unit 12 samples the current resistance Rx of the heating element 11 and compares it with the target resistance Rt corresponding to the current target temperature. If the current resistance Rx is greater than the target resistance Rt, it compares whether the difference between the current resistance Rx and the target resistance Rt is greater than or equal to a preset threshold. The current resistance Rx and the difference between the target resistance Rt is greater than or equal to the preset threshold, the switch unit 121 is turned on in the next heating cycle, and the battery assembly 20 continues to heat the heating element 11 for 0.01 ms. If the difference between the current resistance value Rx and the target resistance value Rt is less than the preset threshold, the switch unit 121 is turned on in the next heating cycle, and the battery assembly 20 continues to heat the heating element 11 for 0.1 ms. If the current resistance value Rx is less than the target resistance value Rt, the switch unit 121 is turned on in the next heating cycle, and the battery assembly 20 continues to heat the heating element 11 for 20 ms. In this embodiment, the values ​​of 0.01 ms, 0.1 ms, 1 ms, and 20 ms are for illustrative purposes only, and actual values ​​may be selected as needed.

[0036] In one embodiment, the control unit 12 includes a proportional-integral-derivative controller (PID controller) that adjusts the first time period T1, the second time period T2, or the third time period T3 based on a fixed and unchanging cutoff time T, the current resistance value Rx, and the target resistance value Rt.

[0037] Specifically, the first time period T1, the second time period T2, and the third time period T3 are adjusted by the duty cycle. For example, a fixed cutoff time T can be set as Toff, and one heating period, for example, the first time period T1, the second time period T2, or the third time period T3, can be set as Ton, and one fixed cutoff time Toff and one heating period Ton are one total time. Based on the duty cycle equation (2), the following can be seen: The adjustable duty cycle range of one heating period Ton is 0-99.9%, i.e., a first ratio between a first time period T1 and a first time total is adjustable, where the first ratio is greater than 0 and less than or equal to 99.9%, and / or a second ratio between a second time period T2 and a second time total is adjustable, where the second ratio is greater than 0 and less than or equal to 99.9%, and / or a ratio between a third time period T3 and a third time total is adjustable, where the third ratio is greater than 0 and less than or equal to 99.9%.

[0038] JPEG0007738173000002.jpg13170

[0039] In one embodiment, the control unit 12 detects the current resistance Rx of the heating element 11 at the cut-off time T.

[0040] In one embodiment, a temperature-time curve and a temperature-resistance relationship table are preset in the heating assembly 10. A target temperature of the heating element 11 at the current point is determined based on the preset temperature-time curve of the heating element 11 during the heating phase. A target resistance Rt corresponding to the target temperature is then determined based on the preset temperature-resistance relationship table. If the current resistance Rx is greater than the target resistance Rt and the difference between the current resistance Rx and the target resistance Rt is equal to or greater than a preset threshold, the control unit 12 opens the path between the battery assembly 20 connected to the heating assembly 10 and the heating element 11 during the first time period T1, thereby driving the heating element 11 to heat during the first time period T1. If the current resistance Rx is greater than the target resistance Rt and the difference between the current resistance Rx and the target resistance Rt is less than the preset threshold, the control unit 12 opens the path between the battery assembly 20 and the heating element 11 during the second time period T2, thereby driving the heating element 11 to heat during the second time period T2.

[0041] The heating assembly 10 provided in the embodiment of the present application uses the control unit 12 to detect the actual resistance Rx of the heating element 11 at the current point during the heating phase, compare it with the target resistance Rt corresponding to the current target temperature stored in advance, and further compare it with the difference between the preset threshold temperature and the target temperature and the actual temperature, and control the conduction of the switch unit 121 by a PWM signal, thereby adjusting the time for which the battery assembly 20 heats the heating element 11, controlling the actual temperature of the heating element 11 to be close to the preset target temperature, and ensuring the atomization effect of the heating assembly 10.

[0042] The PWM signal is a pulse width modulation signal. The present application uses the PWM signal to drive the switch unit on and off, and can adjust the duty cycle of the PWM signal, thereby adjusting the on-time and off-time of the switch unit.

[0043] Referring to FIG. 5, FIG. 5 is a flowchart of a first embodiment of the heating assembly control method of the present application, which specifically includes the following steps:

[0044] Step (S11): detect the current resistance value of the heating element at the current time during the heating stage, and determine the target resistance value corresponding to the current target temperature.

[0045] Specifically, the current resistance of the heating element at the current time during the heating phase is detected, and a target resistance Rt corresponding to the target temperature at the current point is determined. The heating time of the heating element is controlled based on the relationship between the current resistance Rx and the target resistance Rt. As can be understood, in practical applications, the higher the resistance, the higher the temperature. Therefore, if the current resistance Rx is greater than the target resistance Rt, it can be determined that the temperature corresponding to the current resistance Rx is greater than the temperature corresponding to the target resistance Rt.

[0046] Step (S12): In response to the current resistance value being greater than the target resistance value and the difference between the current resistance value and the target resistance value being equal to or greater than a preset threshold, the control unit conducts a path between the battery assembly connected to the heating assembly and the heating element during a first time period T1, thereby driving the heating element to heat during the first time period T1.

[0047] When it is detected that the current resistance Rx of the heating element at the current point is greater than the target resistance Rt at the current point, and the difference between the current resistance Rx and the target resistance Rt is greater than or equal to the preset threshold, the temperature of the heating element is high and the heating element can sufficiently heat the atomization substrate, so that the heating element needs to be heated for a short time to ensure the heating effect of the heating element, and thus the heating element is driven in the first time period.

[0048] Step (S13): In response to the current resistance value being greater than the target resistance value and the difference between the current resistance value and the target resistance value being less than the preset threshold, the control unit conducts a path between the battery assembly and the heating element during a second time period, thereby driving the heating element to heat during the second time period.

[0049] If the difference between the current resistance value Rx of the heating element and the target resistance value Rt is smaller than the preset threshold, the heating effect of the heating element may not be ideal, and some of the atomization substrate may not be heated sufficiently. This requires the heating element to be heated for a relatively long time to ensure that the temperature of the heating element sufficiently heats the atomization substrate. By controlling the temperature of the heating element, it is possible to avoid phenomena such as a burnt odor caused by an overheated heating element and ensure the atomization effect. Therefore, the heating element is activated and heated during the second time period. The second time period is longer than the first time period.

[0050] 6, in another embodiment, in response to the current resistance value being equal to or less than the target resistance value, a path between the battery assembly and the heating element is opened during a third time period, thereby driving the heating element to heat during the third time period. The third time period is longer than the second time period. That is, if the current actual resistance value of the heating element is lower than the target resistance value Rt, the heating element cannot sufficiently heat and atomize the atomization substrate. In this case, it is necessary to ensure that the actual temperature of the heating element not only meets the target temperature requirement, but also that the actual temperature of the heating element is higher than the target temperature plus the target temperature. This requires driving the heating element for a longer time period.

[0051] The control method of the heating assembly provided in this embodiment detects the actual resistance Rx of the heating element at the current time during the heating stage, compares it with the target resistance Rt corresponding to the target temperature at the current point pre-stored and with the preset threshold value, and controls the conduction of the switch unit by a PWM signal to adjust the heating time of the heating element, control the actual temperature of the heating element to be close to the preset target temperature, and ensure the atomization effect of the heating element.

[0052] As shown in Figure 7, Figure 7 is a structural schematic diagram of an electronic atomization device according to an embodiment of the present application. The electronic atomization device includes a heating assembly 10 and a battery assembly 20. Here, the heating assembly 10 can be inserted into a solid atomization substrate or can be surrounded by the outside of the atomization substrate. The battery assembly 20 is electrically connected to the heating assembly 10 and supplies power to the heating assembly 10 so that the heating assembly 10 heats and atomizes the atomization substrate.

[0053] The above are only some of the embodiments of the present application and do not limit the patent scope of the present application. Any equivalent device or equivalent process conversion made by using the contents of the specification and drawings of the present application, or any directly or indirectly applicable to other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A heating assembly including a heating element and a control unit, The control unit detects a current resistance value of the heating element at a current time during the heating stage, and determines a target resistance value corresponding to a current target temperature; In response to the current resistance value being greater than the target resistance value and the difference between the current resistance value and the target resistance value being equal to or greater than a preset threshold, the control unit conducts a path between the heating element and a battery assembly connected to the heating assembly during a first time period so that the heating element is driven and heated during the first time period; In response to the current resistance value being greater than the target resistance value and the difference between the current resistance value and the target resistance value being less than a preset threshold, the control unit conducts a path between the battery assembly and the heating element during a second time period so that the heating element is activated and heated during the second time period; 1. A heating assembly comprising: a heating element configured to: heat the heating element to a temperature within a range of from 100 to 200°C; a heating element configured to heat the heating element to a temperature within a range of from 100 to 200°C;

2. the control unit is further adapted to, in response to the current resistance value being equal to or less than the target resistance value, conduct a path between the battery assembly and the heating element during a third time period such that the heating element is activated and heated during the third time period, the third time period being longer than the second time period; 2. The heating assembly of claim 1, wherein there is one cutoff time between two adjacent third time periods, between adjacent first time periods and third time periods, or between adjacent second time periods and third time periods, and the cutoff time is not changed.

3. 3. The heating assembly of claim 2, further comprising a switch unit installed in a passage between the heating element and the battery assembly, wherein the control unit is connected to the switch unit and controls the conduction of the switch unit so as to conduct the passage between the battery assembly and the heating element during the first time period, the second time period, or the third time period.

4. the heating element includes a heat generating unit and a temperature measuring unit, the heat generating unit is connected to the battery assembly through the switch unit, the temperature measuring unit is connected in parallel to the heat generating unit, and the temperature measuring unit is connected to the control unit so that the control unit detects the current resistance value of the heating element by the temperature measuring unit; 4. The heating assembly of claim 3, further comprising a sampling unit connected in series with the temperature measuring unit, and the sampling unit connected to a control unit, whereby the control unit detects the current flowing through the sampling unit and the temperature measuring unit via the sampling unit, and further determines a resistance value of the temperature measuring unit, wherein the resistance value of the temperature measuring unit characterizes the current resistance value of the heating element.

5. 3. The heating assembly of claim 2, wherein the first time period, the second time period, and the third time period are adjustable.

6. 6. The heating assembly of claim 5, wherein the control unit includes a proportional-integral-derivative controller (PID controller) for adjusting the first time period, the second time period, or the third time period based on the unchanged cutoff time, the current resistance value, and the target resistance value.

7. a first ratio of the first time period to a first total time is adjustable, wherein the first ratio is greater than 0 and less than or equal to 99.9%, and the first total time is the sum of the first time period and the cutoff time; and / or a second ratio of the second time period to the second total time is adjustable, wherein the second ratio is greater than 0 and less than or equal to 99.9%, and the second total time is the sum of the second time period and the cutoff time; and / or 7. The heating assembly of claim 6, wherein a third ratio of the third time period to the third total time is adjustable, wherein the third ratio is greater than 0 and less than or equal to 99.9%, and the third total time is the sum of the third time period and the cutoff time.

8. 3. The heating assembly of claim 2, wherein the control unit is adapted to detect the current resistance value of the heating element at the current time point at the cut-off time.

9. 2. The heating assembly of claim 1, wherein the current target temperature of the heating element is determined based on a preset temperature-time curve in the heating stage of the heating element, and the target resistance value corresponding to the target temperature is determined based on a preset temperature-resistance relationship table.

10. Detecting a current resistance value of the heating element at a current time during the heating phase and determining a target resistance value corresponding to a current target temperature; In response to the current resistance value being greater than the target resistance value and the difference between the current resistance value and the target resistance value being equal to or greater than a preset threshold, conducting a path between the heating element and a battery assembly connected to the heating assembly during the first time period so that the heating element is driven and heated during the first time period; in response to the current resistance value being greater than the target resistance value and the difference between the current resistance value and the target resistance value being less than a preset threshold, conducting a path between the battery assembly and the heating element during a second time period so that the heating element is activated and heated during the second time period, wherein the second time period is longer than the first time period; having one cutoff time between two adjacent first time periods, two adjacent second time periods, or adjacent first time period and second time period, and the cutoff time is not changed.

11. The method for controlling the heating assembly further includes, in response to the current resistance value being equal to or less than the target resistance value, conducting a path between the battery assembly and the heating element during a third time period such that the heating element is activated and heated during the third time period, wherein the third time period is longer than the second time period; and providing one cutoff time between two adjacent third time periods, between adjacent second time periods and third time periods, or between adjacent first time periods and third time periods.

12. 1. An electronic atomization device including a heating assembly and a battery assembly, The heating assembly comprises a heating assembly according to any one of claims 1 to 9; The electronic atomizer, wherein the battery assembly powers the heating assembly.

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