Control method of a heating appliance

Abstract

The application relates to a control method of a heating device, which comprises the following steps: a control module controls a first heating section in the heating device to generate heat; a temperature sensor detects the temperature of the first heating section and feeds back the detected temperature T f to the control module. When the detected temperature T f is greater than the target temperature T S of the first heating section, the control module controls the first heating section not to generate heat; when the detected temperature T f is less than the target temperature Ts, the control module controls the first heating section to generate heat. When the control module controls the first heating section to generate heat, the control module controls a second heating section not to generate heat; when the control module controls the first heating section not to generate heat, the control module controls the second heating section to generate heat intermittently. The second heating section is arranged along the insertion direction of a cigarette. The control method can accurately control the temperature of the heating device in the heating process, ensure that the cigarette can be heated sufficiently, and ensure the uniformity of the smoke amount generated by the cigarette.

Description

Technical Field

[0001] This application relates to the field of new tobacco product technology, and in particular to a control method for a heating device. Background Technology

[0002] As the new tobacco products industry becomes increasingly standardized and regulated, heated cigarette products are also becoming more marketable. Heated cigarette products mainly consist of cigarette sticks and matching heating devices. The heating device uses electricity to heat the cigarette stick, causing it to produce smoke. Existing heating devices typically employ either central heating or peripheral heating methods.

[0003] For external heating, cylindrical or tubular heating elements are generally used. When in use, the cigarette is inserted into the cavity of the heating element, which then generates heat to bake the cigarette. However, this heating method can easily cause over-baking in the middle of the cigarette or insufficient heating at both ends, resulting in problems such as short smoke output time and uneven smoke volume, which will affect the user experience. Summary of the Invention

[0004] Therefore, it is necessary to provide a control method for a heating appliance that, based on the heating appliance including at least two heating elements, can fully heat the cigarette and accurately control the temperature by using only a single temperature sensor to measure the temperature.

[0005] A method for controlling a heating appliance includes the following steps:

[0006] S1: The control module controls the first heating section in the heater to heat up, and the temperature sensor detects the temperature of the first heating section and transmits the detected temperature T. f Feedback is sent to the control module; wherein, when the detected temperature T f Greater than the target temperature T of the first heating segment s When the detection temperature T is reached, the control module controls the first heating section to not heat up. f Less than the target temperature T s At that time, the control module controls the first heating segment to generate heat;

[0007] S2: When the control module controls the first heating segment to heat up, the control module controls the second heating segment to not heat up; when the control module controls the first heating segment to not heat up, the control module controls the second heating segment to heat up intermittently; wherein, the second heating segment and the first heating segment are arranged along the cigarette insertion direction.

[0008] The technical solution will be further explained below:

[0009] In one embodiment, step S1 further includes the following steps:

[0010] S13: The heating process of the first heating segment includes multiple heating cycles C, each heating cycle C including a heating phase and a non-heating phase. During the heating phase, the control module controls the first heating segment to heat up; during the non-heating phase, the control module controls the first heating segment to not heat up. The control module controls the first heating segment to not heat up based on the detected temperature T. f Control the duration of the heating phase.

[0011] In one embodiment, the first heating section has a preheating stage and a constant temperature stage; step S1 includes the following steps:

[0012] S11: During the preheating stage of the first heating segment, the control module controls the first heating segment to heat up, so that the detected temperature T... f Greater than the target temperature T s ;

[0013] S12: During the constant temperature phase of the first heating segment, when the detected temperature T fed back by the temperature sensor... f Less than the target temperature T s At that time, the control module maintains the temperature of the first heating segment at the target temperature T by controlling the first heating segment to output a preset energy value W1 during the heating cycle C1. s .

[0014] In one embodiment, step S12 includes the following steps:

[0015] S121: When the temperature sensor feeds back the detected temperature T f Less than the target temperature T s If the condition is met, step S122 is executed; otherwise, the control module controls the first heating segment to not heat up.

[0016] Wherein: S122: The first heating segment enters the heating cycle C1, and the control module controls the first heating segment to heat up. When the cumulative output energy value of the first heating segment reaches the preset energy value W1, the first heating segment stops heating until the heating cycle C1 ends, and returns to step S121.

[0017] In one embodiment, during the preheating phase and part of the isothermal phase, the control module controls the output voltage to the first heating segment at full power.

[0018] In one embodiment, the second heating segment has a predetermined heating stage, and step S2 includes the following steps:

[0019] S21: The predetermined heating stage includes multiple heating cycles C2. During the heating cycle C2, the control module controls the second heating segment to output a preset energy value W2 in order to control the temperature of the second heating segment.

[0020] In one embodiment, step S21 includes the following steps:

[0021] S211: The control module determines whether the second heating segment is in the predetermined heating stage;

[0022] S212: When the second heating segment is in the predetermined heating stage, step S214 is executed;

[0023] S213: When the second heating segment is not in the predetermined heating stage, the control module controls the second heating segment not to heat up;

[0024] Wherein: S214: The second heating segment enters the heating cycle C2, and the control module controls the second heating segment to heat up. When the cumulative output energy value of the second heating segment reaches the preset energy value W2, the second heating segment stops heating until the heating cycle C2 ends, and returns to step S211.

[0025] In one embodiment, in step S21, the predetermined heating stage includes multiple predetermined heating time periods that are connected or spaced out, and the preset energy value W2 corresponding to each predetermined heating time period may be the same or different.

[0026] In one embodiment, during the heating process of the heater, the target temperature T s It includes multiple target temperatures for each stage, and the target temperature for each stage may be the same or different.

[0027] In one embodiment, the temperature sensor records the temperature of the first heating segment once every first timing period.

[0028] In the aforementioned control method for the heating appliance, the first heating section and the second heating section are arranged along the insertion direction of the cigarette. Therefore, the first heating section is closer to the insertion port in the heating appliance. This allows the temperature of the portion of the cigarette near the insertion port to rise rapidly when the first heating section heats up first and reaches the target temperature first. This is beneficial for increasing the smoke output speed and smoke volume of the first puff. After the first heating section reaches the target temperature, the control module controls the heating state of the second heating section according to the heating process, enabling the heating appliance to effectively regulate the heating area. Therefore, when the heating appliance includes at least two heating elements and only a single temperature sensor is used for temperature measurement, this control method can accurately control the temperature of the heating appliance during the heating process, ensuring that the cigarette is fully heated. Furthermore, this control method can also ensure a continuous and stable output of smoke volume during the heating process and improve the flavor quality of the smoke. Attached Figure Description

[0029] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute an undue limitation of this application.

[0030] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Furthermore, the accompanying drawings are not drawn to a 1:1 scale, and the relative dimensions of the various components are shown as examples only and not necessarily to scale. In the accompanying drawings:

[0032] Figure 1 This is a schematic diagram of the structure of a heating element in a heater appliance for which the control method described in the embodiments of this application is applicable.

[0033] Figure 2 This is a flowchart illustrating a control method for a heating appliance according to an embodiment of this application.

[0034] Figure 3 This is a flowchart illustrating a control method for a heating appliance according to an embodiment of this application.

[0035] Figure 4 This is a flowchart illustrating a control method for a heating appliance according to an embodiment of this application.

[0036] Explanation of reference numerals in the attached figures:

[0037] 100. Heating element; 1. First heating segment; 2. First electrode; 3. Second heating segment; 4. Second electrode. Detailed Implementation

[0038] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0039] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0040] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0041] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0042] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0043] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0044] See Figure 1 , Figure 1 A schematic diagram of a heating element 100 in a heating appliance to which the control method of this embodiment applies is shown. The heating appliance to which the control method of this embodiment applies includes a heating element, a temperature sensor, a battery, and a control module. The heating element includes a heating element 100, a second electrode 4, and two first electrodes 2. The heating element 100 includes a first heating segment 1 and a second heating segment 3 arranged along the cigarette insertion direction. Both the first heating segment 1 and the second heating segment 3 are electrically connected to the second electrode 4, and each of the first heating segment 1 and the second heating segment 3 is electrically connected to one of the first electrodes 2. The temperature sensor is connected to the first heating segment 1, enabling the temperature sensor to measure the temperature of the first heating segment 1. The temperature sensor, the second electrode 4, and the two first electrodes 2 are all electrically connected to the control module. The battery supplies power to the heating element 100 so that the heating element 100 can heat and bake the cigarette. The design of electrically connecting the first heating section 1 and the second heating section 3 to the same second electrode 4 and electrically connecting to different first electrodes 2 allows the control module to independently control the heating of the first heating section 1 and the second heating section 3. This is beneficial for the heating device to achieve zoned heating of the cigarette, thereby facilitating the full heating of the cigarette.

[0045] like Figure 1As shown, since the first heating section 1 and the second heating section 3 are arranged along the insertion direction of the cigarette, the first heating section 1 is closer to the cigarette insertion port in the heating device. Therefore, the first heating section 1 can heat the top part of the cigarette, and the second heating section 3 can heat the bottom part of the cigarette. The first heating section 1 is also closer to the inhalation port of the cigarette.

[0046] It should be noted that the top and bottom portions of a cigarette refer to the parts of the cigarette closest to the insertion opening and the parts furthest away from the insertion opening, respectively. Both the top and bottom portions have a certain length in the insertion direction of the cigarette, and are not simply opposite ends of the cigarette.

[0047] Optionally, the temperature sensor can be a PT100 temperature sensor, or it can be a thermocouple or an NTC temperature sensor.

[0048] Combination Figure 1 and Figure 2 As shown, an embodiment of this application provides a method for controlling a heating appliance, which includes the following steps:

[0049] S1: The control module controls the first heating section 1 in the heating appliance to heat up, and the temperature sensor detects the temperature of the first heating section 1 and transmits the detected temperature T. f Feedback is sent to the control module. Specifically, when the detected temperature T... f The target temperature T is greater than that of the first heating segment 1. s When the temperature T is detected, the control module controls the first heating section 1 to not heat up. f Less than the target temperature T s At that time, the control module controls the first heating segment 1 to generate heat.

[0050] Combination Figure 1 and Figure 2 As shown, the control module controls the first heating section 1 to heat up, enabling the heater to bake the top part of the cigarette, thereby allowing the top part of the cigarette to produce smoke more quickly, thus increasing the smoke output speed and amount of smoke in the first puff. Additionally, the temperature sensor can detect the temperature of the first heating section 1 and transmit the detected temperature T. f Feedback is sent to the control module so that the control module can control the heating of the first heating section 1 according to the temperature detected by the temperature sensor. This helps to adjust the heating of the first heating section 1 in a timely manner, thereby ensuring that the heating device can bake the cigarette at a better temperature, thus ensuring the taste quality of the smoke.

[0051] During the heating process of cigarettes, if the heating temperature is too high, it will not only affect the smoking experience due to the excessively high temperature of the smoke produced by heating the cigarette, but may also lead to a decline in the flavor quality of the smoke due to overheating. If the heating temperature is too low, the amount of smoke produced due to insufficient heating will be insufficient, which is not conducive to improving the user experience. Therefore, during the heating process of the first heating section 1, temperature monitoring of the first heating section 1 helps to avoid the temperature of the first heating section 1 being too high or too low, thereby ensuring the uniformity of the amount of smoke produced by the cigarette and improving the flavor quality of the smoke, thus enhancing the user experience.

[0052] Understandably, the target temperature T s It can be a fixed temperature value, such as 250℃. It can also be a temperature range including an upper and lower temperature limit, for example, a target temperature of 240℃-260℃. Specifically, during the heating process of the first heating segment 1, when the temperature sensor detects that the temperature of the first heating segment 1 is greater than or equal to the upper temperature limit (e.g., greater than or equal to 260℃), the control module controls the first heating segment 1 to stop heating. When the temperature sensor detects that the temperature of the first heating segment 1 is less than the lower temperature limit (e.g., less than 240℃), the control module controls the first heating segment 1 to restart heating.

[0053] S2: When the control module controls the first heating segment 1 to heat up, the control module controls the second heating segment 3 to not heat up. When the control module controls the first heating segment 1 to not heat up, the control module controls the second heating segment 3 to heat up intermittently. The second heating segment 3 and the first heating segment 1 are arranged along the cigarette insertion direction.

[0054] Combination Figure 1 and Figure 2 As shown, the control module enables the heater to effectively regulate the heating process of the first heating section 1 and the second heating section 3 according to the heating process of the cigarette. This allows the heater to achieve zoned heating of the cigarette, ensuring uniform heating and smoke volume during cigarette emission. Since the control module prioritizes heating the first heating section 1 to the target temperature, this control method ensures that the first heating section 1 remains within an optimal heating temperature range, allowing it to continuously heat its corresponding cigarette portion. The second heating section 3 is controlled to heat during the intervals when the first heating section 1 stops heating. This helps to increase the temperature of the corresponding cigarette portion in the second heating section 3 while the first heating section 1 heats the cigarette, thus ensuring the stability of smoke volume and improving the user's smoking experience.

[0055] In the aforementioned control method for the heating appliance, the first heating section 1 and the second heating section 3 are arranged along the insertion direction of the cigarette. Therefore, the first heating section 1 is closer to the insertion port in the heating appliance. This allows the temperature of the portion of the cigarette near the insertion port to rise rapidly when the first heating section 1 heats up first and reaches the target temperature first. This is beneficial for increasing the smoke output speed and smoke volume of the first puff. After the first heating section 1 reaches the target temperature, the control module controls the heating state of the second heating section 3 according to the heating process. This allows the heating appliance to effectively regulate the heating area. Therefore, when the heating appliance includes at least two heating elements and only a single temperature sensor is used for temperature measurement, this control method can accurately control the temperature of the heating appliance during the heating process, ensuring that the cigarette is fully heated. In addition, this control method can also ensure a continuous and stable output of smoke volume during the heating process and improve the flavor quality of the smoke.

[0056] Furthermore, in one embodiment, the temperature sensor records the temperature of the first heating segment 1 every first timing interval. The temperature sensor detects the temperature of the first heating segment 1 at intervals, which can shorten the operating time of the temperature sensor while ensuring detection accuracy, thereby extending the service life of the temperature sensor and reducing the energy consumption of the heating appliance.

[0057] Optionally, the first timing segment can be 20ms.

[0058] Furthermore, in other implementations, the temperature sensor can continuously detect the temperature of the first heating segment 1. Alternatively, the time interval for the temperature sensor to measure the temperature of the first heating segment 1 can be adjusted as needed.

[0059] Furthermore, during the heating process of the heating appliance, the target temperature T s This includes multiple target temperatures, each with its own or different target temperatures. During the heating process, the surface of the cigarette is heated before the interior. Therefore, the target temperature T corresponding to the first heating stage 1 is adjusted according to the temperature required for the cigarette to be fully heated during the heating process of the heating device. f This helps ensure that the interior of the cigarette section corresponding to the first heating section 1 is sufficiently heated. Furthermore, as heating progresses, the target temperature T of the first heating section 1 can be appropriately reduced. f This helps to shorten the first heating stage 1 in order to maintain the target temperature T. f The required heating time allows for extending the heating time of the second heating section 3 as needed, which in turn allows the second heating section 3 to fully heat the corresponding tobacco segments, ensuring that the cigarette is fully heated and improving the uniformity of the smoke output.

[0060] Among them, different target temperatures T fThe heating stage 1 can correspond to different heating phases. During the heating process, the heating phases of the first heating stage 1 can be divided according to the heating characteristics of the heating appliance, as long as the cigarette is sufficiently heated. For example, the heating process of the first heating stage 1 can include four phases, each corresponding to the first 40 seconds after the heating appliance starts, 40-90 seconds after start-up, 90-150 seconds after start-up, and 150-220 seconds after start-up. The target temperatures for each phase can be 250℃, 208℃, 190℃, and 190℃, respectively.

[0061] In one embodiment, combined Figure 1 As shown, step S1 further includes the following steps:

[0062] S13: The heating process of the first heating segment 1 includes multiple heating cycles C. Each heating cycle C includes a heating phase and a non-heating phase. During the heating phase, the control module controls the first heating segment 1 to heat up; during the non-heating phase, the control module controls the first heating segment 1 to not heat up. The control module determines the heating process based on the detected temperature T. f The duration of the heating phase is controlled. The control module controls the first heating section 1 to heat up in a heating cycle C, which helps to ensure that the first heating section 1 is always within the optimal heating temperature during the heating process of the heater.

[0063] Specifically, during the heating process of the heating appliance, if the temperature sensor detects that the temperature of the first heating section 1 is lower than the target temperature T... f At that time, the temperature sensor will feed back the detected temperature value to the control module, and the control module will receive the detected temperature T. s Then, the control module calls its internal database to determine the current detected temperature T. s The first heating stage 1 heats up to the target temperature T. f The required heating time is determined, and the heating of the first heating stage 1 is controlled by adjusting the duty cycle of the heating phase within the heating cycle C. For example, when the target temperature T... s The temperature is 250℃, while the detection temperature T f When the temperature is 249℃, the control module, after calling the database, determines that the duty cycle of the heating phase during this heating cycle only needs to be 1% to make the first heating segment 1 reach the target temperature T. s The control module then controls the first heating segment 1 to heat up for 1% of the duration of the heating cycle C, and not to heat up for the remaining duration. Alternatively, when the target temperature T... s The temperature is 250℃, while the detection temperature T fWhen the temperature is 240℃, the control module, after calling the database, determines that the duty cycle of the heating phase during this heating cycle needs to be 20% in order for the first heating segment 1 to reach the target temperature T. s The control module controls the first heating segment 1 to heat up for 20% of the duration of the heating cycle C, and not heat up for the remaining duration. The duty cycle of the heating phase refers to the ratio of the duration of the heating phase to the total duration within the heating cycle C.

[0064] Understandably, during the heating cycle C, when the temperature of the first heating segment 1 is not detected to be lower than the target temperature T... s At the same time, the duty cycle of the heating phase within the heating cycle C can also be 0, for example, when the target temperature T s When the temperature range is defined, if the temperature detection module detects that the temperature of the first heating segment 1 is within the temperature range during the heating cycle C, the duty cycle of the heating stage is also 0. However, when the control module detects the temperature T... f When it is determined that continuous heating is required within the heating cycle C, the duty cycle of the heating phase can also be 100.

[0065] In another embodiment, combined with Figure 1 and Figure 3 As shown, the first heating section 1 has a preheating stage and a constant temperature stage; step S1 includes the following steps:

[0066] S11: During the preheating stage of the first heating section 1, the control module controls the first heating section 1 to heat up, so that the detection temperature T f Greater than the target temperature T s ;

[0067] S12: During the constant temperature stage of the first heating segment 1, when the temperature sensor feeds back the detected temperature T... f Less than the target temperature T s At that time, the control module maintains the temperature of the first heating section 1 at the target temperature T by controlling the first heating section 1 to output a preset energy value W1 within the heating cycle C1. s .

[0068] Combination Figure 1 and Figure 3 As shown, after the preheating stage, the temperature of the first heating section 1 reaches an optimal heating temperature. This allows the temperature of the first heating section 1 to be stably maintained at the target temperature T during the isothermal stage. s This ensures the cigarette is fully heated. However, when the temperature sensor detects that the temperature of the first heating section 1 is lower than the target temperature T... s During heating cycle C1, the temperature of the first heating segment 1 is maintained at the target temperature T by outputting a preset energy value W1 within the first heating segment 1. sThis helps ensure that the first heating section 1 can continuously bake the cigarette at a better temperature, thus ensuring that the cigarette is fully heated and that the smoke from the cigarette is evenly emitted during the heating process.

[0069] Optionally, the predetermined energy value W1 can be set as needed, for example, it can be 1 joule.

[0070] Furthermore, combined Figure 1 , Figure 3 and Figure 4 As shown, step S12 includes the following steps:

[0071] S121: When the temperature sensor reports the detected temperature T f Less than the target temperature T s If the condition is met, step S122 is executed; otherwise, the control module controls the first heating segment 1 to not heat up.

[0072] Wherein: S122: The first heating segment 1 enters the heating cycle C1, and the control module controls the first heating segment 1 to heat up. When the cumulative output energy value of the first heating segment 1 reaches the preset energy value W1, the first heating segment 1 stops heating until the heating cycle C1 ends, and returns to step S121.

[0073] When the temperature of the first heating segment 1 is lower than the target temperature T s At this time, the control module prioritizes controlling the first heating segment 1 to enter heating cycle C1, thereby enabling the first heating segment 1 to output a preset energy value W1 to increase its temperature. Specifically, the control module only determines whether the first heating segment 1 needs to enter the next heating cycle after completing one heating cycle. This allows the second heating segment 3 to utilize the time during which the first heating segment 1 is not heating within heating cycle C1 to generate heat, thus helping to maintain or increase the temperature of the second heating segment 3. This, in turn, helps to ensure sufficient heating of the cigarette and uniformity of smoke output during inhalation.

[0074] For example, the total duration of heating cycle C1 is 10ms. When the first heating segment 1 enters heating cycle C1, it only needs 2ms to accumulate and output the preset energy value W1, thus creating an 8ms gap during heating cycle C1 where the first heating segment 1 does not heat up. During this gap, since the first heating segment 1 is in a non-heating state, the control module can control the second heating segment 3 to heat up or not heat up as needed. Only after heating cycle C1 ends does the control module re-determine whether the current temperature of the first heating segment 1 is still lower than the target temperature T. s When the first heating segment 1 is lower than the target temperature T s At that time, the first heating segment 1 re-enters the heating cycle C1 and outputs the preset energy value W1.

[0075] Furthermore, during the preheating and partial constant-temperature phases, the control module controls the output voltage to the first heating section 1 at full power. The battery outputting voltage to the first heating section 1 at full power helps to shorten the temperature rise process of the first heating section 1, thereby increasing the smoke output speed of the first puff.

[0076] In one embodiment, combined Figure 1 , Figure 2 and Figure 3 As shown, the second heating section 3 has a predetermined heating stage, and step S2 includes the following steps:

[0077] S21: The predetermined heating stage includes multiple heating cycles C2. During the heating cycle C2, the control module controls the second heating segment 3 to output a preset energy value W2 in order to control the temperature of the second heating segment 3.

[0078] The predetermined heating stage refers to a specific time period during which the heating appliance controls the second heating segment 3 to start or stop heating until the second heating segment 3 reaches or maintains a certain temperature. Illustratively, the predetermined heating stage can be the duration of the heating appliance's heating process or a specific period during the heating appliance's process of maintaining a constant temperature.

[0079] Combination Figure 1 and Figure 3 As shown, since the second heating section 3 does not have a temperature sensor to detect and provide temperature feedback, its temperature control is an open-loop control. Therefore, when the second heating section 3 is in the predetermined heating stage, controlling its heating process by outputting a fixed energy value within the heating cycle C2 not only helps maintain or quickly increase the heating temperature of the cigarette, but also avoids excessively high cigarette temperatures caused by continuous heating. Thus, this control method helps ensure sufficient heating of the cigarette, guarantees the amount of smoke produced, and improves the flavor of the smoke.

[0080] Optionally, during the same heating time period of the heating appliance, the preset energy value W1 of the first heating segment 1 may be the same as or different from the preset energy value W2 of the second heating segment 3.

[0081] Furthermore, combined Figure 1 and Figure 3As shown, in step S21, the predetermined heating stage includes multiple predetermined heating time periods that are either connected or spaced out. The preset energy value W2 corresponding to each predetermined heating time period may be the same or different. Since the first heating segment 1 heats up preferentially to the second heating segment 3, the amount of smoke produced by the tobacco segment corresponding to the first heating segment 1 will gradually decrease as heating progresses. Therefore, in order to ensure the uniformity of smoke output, the temperature of the second heating segment 3 can be adjusted by adjusting the predetermined energy value W2 output by the second heating segment 3 within the heating cycle C2, thereby adjusting the amount of smoke produced by the tobacco segment corresponding to the second heating segment 3 and ensuring uniform smoke output. In addition, since the surface part of the cigarette is baked before the internal part during the heating process, changing the preset energy value output by the second heating segment 3 within different heating cycles C2 according to the temperature requirement for fully heating the cigarette during the heating process of the heating device helps to ensure that the internal part of the cigarette corresponding to the second heating segment 3 is fully heated.

[0082] Optionally, the division of the predetermined heating time period within the predetermined heating stage and the energy within each predetermined heating time period can be designed as needed. For example, the predetermined heating stage includes a continuous first predetermined heating time period, a second predetermined heating time period, and a third predetermined heating time period. During the first predetermined heating time period, the predetermined energy value W2 can be Q1. During the second predetermined heating time period, the predetermined energy value W2 is 1.45 times Q1. During the third predetermined heating time period, the predetermined energy value W2 is 1.55 times Q1.

[0083] Furthermore, combined Figure 1 , Figure 3 and Figure 4 As shown, step S21 includes the following steps:

[0084] S211: The control module determines whether the second heating section 3 is in the predetermined heating stage;

[0085] S212: When the second heating section 3 is in the predetermined heating stage, step S214 is executed;

[0086] S213: When the second heating segment 3 is not in the predetermined heating stage, the control module controls the second heating segment 3 to not heat up;

[0087] Wherein: S214: The second heating segment 3 enters the heating cycle C2, and the control module controls the second heating segment 3 to heat up. When the cumulative output energy value of the second heating segment 3 reaches the preset energy value W2, the second heating segment 3 stops heating until the heating cycle C2 ends, and returns to step S211.

[0088] During the process of controlling the heating of the second heating section 3 in the manner of heating cycle C2, the control module will only determine whether the second heating section 3 is in the predetermined heating stage after the end of one heating cycle C2. This helps to ensure the temperature of the second heating section 3 and avoid the problem of the second heating section 3 being too hot due to continuous heating, thus helping to ensure that the cigarette is fully heated.

[0089] It is understandable that, since the heating of the first heating segment 1 takes precedence over the heating of the second heating segment 3, when the second heating segment 3 is in heating cycle C2 and is heating, the temperature of the first heating segment 1 is detected to be lower than the target temperature T. s In one embodiment, the control module controls the second heating segment 3 to immediately stop heating and controls the first heating segment 1 to heat up. Then, when the first heating segment 1 completes one heating cycle and stops heating, the second heating segment 3 continues to output energy until its cumulative output energy value reaches W2. In another embodiment, the control module controls the second heating segment 3 to immediately stop heating and controls the first heating segment 1 to heat up. Then, when the first heating segment 1 completes one heating cycle and stops heating, the second heating segment 3 enters a new heating cycle C2 and recalculates the output energy until its cumulative output energy value reaches W2.

[0090] Furthermore, when the second heating segment 3 is in heating cycle C2 and is heating, if the temperature of the first heating segment 1 is detected to be lower than the target temperature Ts, the control module can control the second heating segment 3 to continue heating until its output energy reaches W2 or until the heating cycle C2 ends, and then control the first heating segment 1 to heat up again. When the first heating segment 1 completes one heating cycle and stops heating, the control module will then determine again whether the second heating segment 3 is in the predetermined heating stage and execute the corresponding operation based on the determination result.

[0091] It is understandable that, since the first heating segment 1 and the second heating segment 3 are electrically connected to the same second electrode 4 but to different first electrodes 2, the control module can independently control the heating of the first heating segment 1 and the second heating segment 3. Therefore, when the control module controls the first heating segment 1 and the second heating segment 3 to heat in a heating cycle, the heating cycle C (or heating cycle C1) and the heating cycle C2 can be independent of each other. This is beneficial for the heating device to achieve zoned heating of the cigarette, thereby facilitating the full heating of the cigarette.

[0092] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above 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.

[0093] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A control method for a heating appliance, characterized in that, Includes the following steps: S1: The control module controls the first heating section in the heater to heat up, and the temperature sensor detects the temperature of the first heating section and transmits the detected temperature T. f Feedback is sent to the control module; wherein, when the detected temperature T f Greater than the target temperature T of the first heating segment s When the detection temperature T is reached, the control module controls the first heating section to not heat up. f Less than the target temperature T s At that time, the control module controls the first heating segment to generate heat; S2: When the control module controls the first heating segment to heat up, the control module controls the second heating segment not to heat up; when the control module controls the first heating segment not to heat up, the control module controls the second heating segment to heat up intermittently; wherein, the second heating segment and the first heating segment are arranged along the cigarette insertion direction; The first heating section has a preheating stage and a constant temperature stage; step S1 includes the following steps: S11: During the preheating stage of the first heating segment, the control module controls the first heating segment to heat up, so that the detected temperature T... f Greater than the target temperature T s ; S12: During the constant temperature phase of the first heating segment, when the detected temperature T fed back by the temperature sensor... f Less than the target temperature T s At that time, the control module maintains the temperature of the first heating segment at the target temperature T by controlling the first heating segment to output a preset energy value W1 within the heating cycle C1. s ; Step S12 includes the following steps: S121: When the temperature sensor feeds back the detected temperature T f Less than the target temperature T s If the condition is met, step S122 is executed; otherwise, the control module controls the first heating segment to not heat up. Wherein: S122: The first heating segment enters the heating cycle C1, and the control module controls the first heating segment to heat up. When the cumulative output energy value of the first heating segment reaches the preset energy value W1, the first heating segment stops heating until the heating cycle C1 ends, and returns to step S121.

2. The control method for the heating appliance according to claim 1, characterized in that, Step S1 further includes the following steps: S13: The heating process of the first heating segment includes multiple heating cycles C, each heating cycle C including a heating phase and a non-heating phase. During the heating phase, the control module controls the first heating segment to heat up; during the non-heating phase, the control module controls the first heating segment to not heat up. The control module controls the first heating segment to not heat up based on the detected temperature T. f Control the duration of the heating phase.

3. The control method for the heating appliance according to claim 1, characterized in that, The heating device includes a heating element, which includes a heating element, a second electrode, and two first electrodes; wherein the heating element includes a first heating segment and a second heating segment arranged along the insertion direction of the cigarette stick, both the first heating segment and the second heating segment are electrically connected to the second electrode, and each of the first heating segment and the second heating segment is electrically connected to one of the first electrodes.

4. The control method for heating appliances according to claim 1, characterized in that, During the preheating phase and part of the constant temperature phase, the control module controls the output voltage to the first heating section at full power.

5. The control method for a heating appliance according to claim 1, characterized in that, The second heating section has a predetermined heating stage, and step S2 includes the following steps: S21: The predetermined heating stage includes multiple heating cycles C2. During the heating cycle C2, the control module controls the second heating segment to output a preset energy value W2 in order to control the temperature of the second heating segment.

6. The control method for a heating appliance according to claim 5, characterized in that, Step S21 includes the following steps: S211: The control module determines whether the second heating segment is in the predetermined heating stage; S212: When the second heating segment is in the predetermined heating stage, step S214 is executed; S213: When the second heating segment is not in the predetermined heating stage, the control module controls the second heating segment not to heat up; Wherein: S214: The second heating segment enters the heating cycle C2, and the control module controls the second heating segment to heat up. When the cumulative output energy value of the second heating segment reaches the preset energy value W2, the second heating segment stops heating until the heating cycle C2 ends, and returns to step S211.

7. The control method for a heating appliance according to claim 5, characterized in that, In step S21, the predetermined heating stage includes multiple predetermined heating time periods that are connected or spaced out, and the preset energy value W2 corresponding to each predetermined heating time period may be the same or different.

8. The control method for a heating appliance according to claim 5, characterized in that, When the second heating segment is in the heating cycle C2 and is heating, if the temperature of the first heating segment is detected to be lower than the target temperature Ts, the control module controls the second heating segment to stop heating immediately and controls the first heating segment to heat up; after the first heating segment completes one heating cycle and stops, the second heating segment continues to output energy or enters a new heating cycle C2.

9. The control method for a heating appliance according to claim 1, characterized in that, During the heating process of the heating appliance, the target temperature T s It includes multiple target temperatures for each stage, and the target temperature for each stage may be the same or different.

10. The control method for a heating appliance according to claim 1, characterized in that, The temperature sensor records the temperature of the first heating segment once every first timing period.

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