EP4578311A1

EP4578311A1 - Adaptive airflow heated tobacco utensil and control method

Info

Publication number: EP4578311A1
Application number: EP24850309.6A
Authority: EP
Inventors: Fan Zhang; Tinghua Li; Shanzhai SHANG; Liu Hong; Shoubo LI; Zhiqiang Li; Donglai ZHU; Yunhua QIN; Yi Han; Xia Zhang; Weimin GONG; Yongfeng Tian
Original assignee: China Tobacco Yunnan Industrial Co Ltd
Current assignee: China Tobacco Yunnan Industrial Co Ltd
Priority date: 2023-11-07
Filing date: 2024-10-29
Publication date: 2025-07-02
Anticipated expiration: 2044-10-29
Also published as: WO2025098193A1; EP4578311B1; EP4578311B8; CN117297200A; EP4578311A4

Abstract

The present invention belongs to the technical field of tobacco, and discloses an adaptive airflow heating smoking set, including a flue assembly (1), an airflow heating assembly (2), a connecting piece (3), a ducted fan (4) and a smoking set base (5), wherein the flue assembly (1) is arranged at an upper portion of the airflow heating assembly (2); a lower end of the airflow heating assembly (2) is connected with the ducted fan (4) through the connecting piece (3); and the ducted fan (4) is arranged on the smoking set base (5). The present invention also discloses a control method for the adaptive airflow heating smoking set.

Description

TECHNICAL FIELD

The present invention belongs to the technical field of tobacco, and particularly relates to an adaptive airflow heating smoking set and a control method.

BACKGROUND

The existing heating mode of a heat-not-burn smoking set is mainly based on resistance heating, which is divided into central heating and circumferential heating, wherein a central heating smoking set has a high energy utilization rate, but the heating of cigarettes is not sufficient enough, and at the same time, there is a disadvantage that cut tobacco is easy to remain in a flue so that the smoking set is difficult to clean. A circumferential heating smoking set improves the utilization rate of cigarettes due to radiation of heat from the circumferential direction to the center, but heat loss is higher, and paper smell may be generated during heating to produce bad experience for consumers. For the above reasons, there has been an airflow heating smoking set in the industry, and a cigarette core segment is heated by installing a heating assembly at the bottom of the smoking set to heat flowing air generated by the consumer's puff. Since the air is used as a medium to heat cut tobacco, a heating area of the cut tobacco is large and the heating efficiency is high, and at the same time, the cut tobacco is not in direct contact with a heating sheet, and thus, the problem that the cut tobacco remains so that the smoking set is difficult to clean is solved.
Because an air flow of the existing airflow heating smoking set is generated by the consumers' puff, the heated air enters from the bottom of the cigarette, but the cigarette core segment has a certain heat interception capacity, and the temperature of different cigarette core segments is significantly different when the air flow passes through the cigarette core segments. Thus, the heat release from the cigarette core segment is primarily concentrated in a lower half segment of the cigarette core segment, while the utilization rate of an upper half segment of the cigarette core segment is not high. At the same time, repeated baking of the lower half segment of the cigarette core segment will produce a burnt smell, resulting in poor consumption experience. And cigarettes with different specifications and cigarette core segment materials have different heat interception capabilities, and the existing airflow heating smoking set has poor adaptability to cigarettes with different circumferences, lengths and cigarette core segment materials.
Therefore, the present invention is proposed.

SUMMARY

The present invention discloses an adaptive airflow heating smoking set and a control method. The adaptive airflow heating smoking set structure of the present invention controls a gas flow rate to perform segmented heating on a cigarette core segment. The adaptive airflow heating smoking set structure has high adaptability to cigarettes with different circumferences, lengths and cigarette core segment materials.
The technical solutions of the present invention are as follows:
A first aspect of the present invention discloses an adaptive airflow heating smoking set, including a flue assembly 1, an airflow heating assembly 2, a connecting piece 3, a ducted fan 4 and a smoking set base 5, wherein the flue assembly 1 is arranged on an upper portion of the airflow heating assembly 2; a lower end of the airflow heating assembly 2 is connected with the ducted fan 4 through the connecting piece 3; and the ducted fan 4 is arranged on the smoking set base 5.
Preferably, the flue assembly 1 includes: a plurality of cigarette holder blocks, a first air filter screen 114, a flue 102 and a flue insulation jacket 101; the plurality of the cigarette holder blocks have the same size and shape, are in the shape of a cylindrical wall split in an axial direction, and have an upper end wall surface being in the shape of an inward slope; the plurality of the cigarette holder blocks are vertically arranged to form a cylindrical shape with a variable cylinder diameter, an outer periphery of the cylindrical shape is the cylindrical flue 102, and an outer periphery of the flue 102 is the flue insulation jacket 101; a bottom of each cigarette holder block is provided with a respective slide rail 109, and a middle of an outer wall of each cigarette holder block is provided with a spring 107; each spring 107 is fixed to an inner wall of the flue 102 by a spring base 106; each slide rail 109 is provided with a limit block 115; the first air filter screen 114 is fixedly arranged on a bottom of the flue 102; and the slide rails 109 and the limit blocks 115 are mounted on the first air filter screen 114.
Preferably, a puffing sensor 108 and a gas flow rate sensor 116 are installed at a lower end of the flue 102; a flexible sealing pad 117 is installed at an upper end port of the flue insulation jacket 101; and a plurality of temperature sensors are arranged on an inner wall of one of the cigarette holder blocks.
Preferably, three cigarette holder blocks are provided, and are respectively a first cigarette holder block 103, a second cigarette holder block 104 and a third cigarette holder block 105; four temperature sensors are provided, are equidistantly arranged on an inner wall of the first cigarette holder block 103, and are respectively a first temperature sensor 110, a second temperature sensor 111, a third temperature sensor 112 and a fourth temperature sensor 113 from top to bottom; and surfaces of the four temperature sensors are in direct contact with a tobacco 10 inserted in the flue 102.
Preferably, the airflow heating assembly 2 includes a cavity insulation sleeve 201, a first cavity 202 and a second cavity 203; the first cavity 202 and the second cavity 203 are combined together to form a completed airflow and heating cavity; the cavity insulation sleeve 201 wraps around a periphery of the airflow and heating cavity; an airflow channel 204 is arranged inside the second cavity 203, and the airflow channel 204 is shaped the same as a Tesla valve; a heating strip 205 is printed in the airflow channel 204; and an airflow channel and a heating strip are also arranged in the first cavity 202, and are mirror-symmetrical to those in the second cavity 203.
Preferably, the connecting piece 3 has a rectangular interface at an upper end and external threads at a lower end; the rectangular interface at the upper end of the connecting piece 3 is in interference fit with a rectangular hole in a lower end of the airflow heating assembly 2, and the external threads at the lower end are connected with the ducted fan 4 through internal threads; and a second air filter screen 8 is installed in an air inlet at a bottom end of the ducted fan 4.
Preferably, the smoking set further includes a battery 6, a support frame 7 and a smoking set shell 9, wherein the support frame 7 is fixed inside the smoking set shell 9, and the support frame 7 is configured to fixedly mount the battery 6 and the airflow heating assembly 2; and the smoking set shell 9 and the smoking set base 5 are connected together by a fastener.
A second aspect of the present invention discloses a control method for an adaptive airflow heating smoking set, using the above smoking set, and including the steps of: inserting a cigarette 10 into a cylindrical space formed by a first cigarette holder block 103, a second cigarette holder block 104 and a third cigarette holder block 105 along a ramp-shaped mouth; performing heating by a heating strip 205 in an airflow heating assembly 2, starting a ducted fan 4 to output an air flow, and detecting a gas flow rate by a gas flow rate sensor 116; measuring four temperatures from top to bottom by a first temperature sensor 110, a second temperature sensor 111, a third temperature sensor 112 and a fourth temperature sensor 113; obtaining a heat interception coefficient of a cigarette core segment of the cigarette 10 according to a relationship between the gas flow rate and the four temperatures; and matching a corresponding flow rate curve according to the heat interception coefficient, and then performing heating by the heating strip 205 to a required temperature, thereby completing a whole pre-heating process; and
transmiting, by a puffing sensor 108, a signal to the ducted fan 4 when smoking the cigarette 10, and outputting a gas flow rate by the ducted fan 4 according to a flow rate curve preheated in a preheating phase; while performing continuous heating by the heating assembly 2 according to a preset heating curve; feeding back puff number data detected by the puffing sensor 108 to the heating assembly 2 and the ducted fan 4 in real time to correct the flow rate curve and the heating curve; and separately performing temperature detection on an upper part, a middle upper part, a middle lower part, and a lower part of the cigarette core segment of the cigarette 10 by the four temperature sensors, first heating the upper part of the cigarette core segment at a faster gas flow rate, and after the heating is completed, separately heating the middle upper part, the middle lower part, and the lower part of the cigarette core segment, and performing real-time feedback adjustment by the temperature sensors at the respective parts, thereby finally completing the entire puffing process.
The beneficial effects of the present invention are as follows:
The adaptive airflow heating smoking set designed in the present invention can match cigarettes with different lengths, circumferences, and cigarette core segment materials. The adaptive airflow heating smoking set of the present invention enables the air flow temperature to be better conducted to different parts of the cigarette core segment through the cooperation of the ducted fan and the airflow heating assembly, and the utilization rate of the cigarette core segment can be greatly improved through the regulation of the sensors, thereby avoiding a burnt smell caused by repeated baking of the same part of the cigarette core segment, thus bringing bad consumption experience.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic diagram of the appearance of the adaptive airflow heating smoking set according to the present invention.
FIG. 2 is a schematic diagram of an internal structure of the adaptive airflow heating smoking set according to the present invention.
FIG. 3 is an exploded view of the internal structure of the adaptive airflow heating smoking set of the present invention.
FIG. 4 is an exploded view of the internal three-dimensional structure of the adaptive airflow heating smoking set according to the present invention.
FIG. 5 is a diagram showing an internal structure of a flue assembly according to the present invention.
FIG. 6 is a cross-sectional view of the internal structure of the flue assembly according to the present invention.
FIG. 7 is a schematic structural diagram of an airflow heating assembly according to the present invention.
FIG. 8 is a schematic structural diagram of a flue insulation jacket according to the present invention.
FIG. 9 is a control flow diagram of the adaptive airflow heating smoking set according to the present invention.
FIG. 10 is a graph of a gas flow rate of the adaptive airflow heating smoking set according to the present invention versus the puff number.
FIG. 11 is a curve showing different sensor temperatures according to the present invention.

Reference numerals: 1, flue assembly; 101, flue insulation jacket; 102, flue; 103, first cigarette holder block; 104, second cigarette holder block; 105, third cigarette holder block; 106, spring base; 107, spring; 108, puffing sensor; 109, slide rail; 110, first temperature sensor; 111, second temperature sensor; 112, third temperature sensor; 113, fourth temperature sensor; 114, first air filter screen; 115, limit block; 116, gas flow rate sensor; 117, sealing pad; 2, airflow heating assembly; 201, cavity insulation sleeve; 202, first cavity; 203, second cavity; 204, airflow channel; 205, heating strip; 3, connecting piece; 4, ducted fan; 5, smoking set base; 6, battery; 7, support frame; 8, second air filter screen; 81, sealing ring; 9, smoking set shell; and 10, cigarette.

DETAILED DESCRIPTION

In order to make the objects, technical solutions and advantages of the present invention more clear, the present invention will be further described below in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention. Furthermore, technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
As shown in FIGS. 1 to 8, an adaptable airflow heating smoking set of the present invention includes a flue assembly 1, an airflow heating assembly 2, a connecting piece 3, a ducted fan 4 and a smoking set base 5, wherein the flue assembly 1 is arranged on an upper portion of the airflow heating assembly 2; a lower end of the airflow heating assembly 2 is connected with the ducted fan 4 through the connecting piece 3; and the ducted fan 4 is arranged on the smoking set base 5.
As shown in FIGS. 5 to 6, the flue assembly 1 includes: a plurality of cigarette holder blocks, a first air filter screen 114, a flue 102 and a flue insulation jacket 101; the plurality of the cigarette holder blocks have the same size and shape, are in the shape of a cylindrical wall split in an axial direction, and have an upper end wall surface being in the shape of an inward slope; the plurality of the cigarette holder blocks are vertically arranged to form a cylindrical shape with a variable cylinder diameter, an outer periphery of the cylindrical shape is the cylindrical flue 102, and an outer periphery of the flue 102 is the flue insulation jacket 101; a bottom of each cigarette holder block is provided with a respective slide rail 109, and a middle of an outer wall of each cigarette holder block is provided with a spring 107; each spring 107 is fixed to an inner wall of the flue 102 by a spring base 106; each slide rail 109 is provided with a limit block 115; the first air filter screen 114 is fixedly arranged on a bottom of the flue 102; and the slide rails 109 and the limit blocks 115 are mounted on the first air filter screen 114.
A puffing sensor 108 and a gas flow rate sensor 116 are installed at a lower end of the flue 102; a flexible sealing pad 117 is installed at an upper end port of the flue insulation jacket 101; and a plurality of temperature sensors are arranged on an inner wall of one of the cigarette holder blocks.
Three cigarette holder blocks are provided, and are respectively a first cigarette holder block 103, a second cigarette holder block 104 and a third cigarette holder block 105; four temperature sensors are provided, are equidistantly arranged on an inner wall of the first cigarette holder block 103, and are respectively a first temperature sensor 110, a second temperature sensor 111, a third temperature sensor 112 and a fourth temperature sensor 113 from top to bottom; and surfaces of the four temperature sensors are in direct contact with a tobacco 10 inserted in the flue 102.
As shown in FIG. 7, the airflow heating assembly 2 includes a cavity insulation sleeve 201, a first cavity 202 and a second cavity 203; the first cavity 202 and the second cavity 203 are combined together to form a completed airflow and heating cavity; the cavity insulation sleeve 201 wraps around a periphery of the airflow and heating cavity; an airflow channel 204 is arranged inside the second cavity 203, and the airflow channel 204 is shaped the same as a Tesla valve; a heating strip 205 is printed in the airflow channel 204; and an airflow channel and a heating strip are also arranged in the first cavity 202, and are mirror-symmetrical to those in the second cavity 203.
As shown in FIGS. 3 to 4, the connecting piece 3 has a rectangular interface at an upper end and external threads at a lower end; the rectangular interface at the upper end of the connecting piece 3 is in interference fit with a rectangular hole in a lower end of the airflow heating assembly 2, and the external threads at the lower end are connected with the ducted fan 4 through internal threads; and a second air filter screen 8 is installed in an air inlet at a bottom end of the ducted fan 4.
As shown in FIGS. 1 to 2, the smoking set further includes a battery 6, a support frame 7 and a smoking set shell 9, wherein the support frame 7 is fixed inside the smoking set shell 9, and the support frame 7 is configured to fixedly mount the battery 6 and the airflow heating assembly 2; and the smoking set shell 9 and the smoking set base 5 are connected together by a fastener.
A method for using an adaptive airflow heating smoking set of the present invention includes the steps of:

inserting a cigarette 10 into a cylindrical space formed by a first cigarette holder block 103, a second cigarette holder block 104 and a third cigarette holder block 105 along a ramp-shaped mouth; performing heating by a heating strip 205 in an airflow heating assembly 2, starting a ducted fan 4 to output an air flow, and detecting a gas flow rate by a gas flow rate sensor 116; measuring four temperatures from top to bottom by a first temperature sensor 110, a second temperature sensor 111, a third temperature sensor 112 and a fourth temperature sensor 113; obtaining a heat interception coefficient of a cigarette core segment of the cigarette 10 according to a relationship between the gas flow rate and the four temperatures; and matching a corresponding flow rate curve according to the heat interception coefficient, and then performing heating by the heating strip 205 to a required temperature, thereby completing a whole pre-heating process; and
transmiting, by a puffing sensor 108, a signal to the ducted fan 4 when smoking the cigarette 10, and outputting a gas flow rate by the ducted fan 4 according to a flow rate curve preheated in a preheating phase; while performing continuous heating by the heating assembly 2 according to a preset heating curve; feeding back puff number data detected by the puffing sensor 108 to the heating assembly 2 and the ducted fan 4 in real time to correct the flow rate curve and the heating curve; and separately performing temperature detection on an upper part, a middle upper part, a middle lower part, and a lower part of the cigarette core segment of the cigarette 10 by the four temperature sensors, first heating the upper part of the cigarette core segment at a faster gas flow rate, and after the heating is completed, separately heating the middle upper part, the middle lower part, and the lower part of the cigarette core segment, and performing real-time feedback adjustment by the temperature sensors at the respective parts, thereby finally completing the entire puffing process.

In the adaptive airflow heating smoking set of the present invention, the cigarette 10 is inserted in the middle of the first cigarette holder block 103, the second cigarette holder block 104 and the third cigarette holder block 105, and since the upper ends of the three cigarette holder blocks are each an inward slope-shaped arc surface, when the cigarette 10 is inserted, the bottoms of the three cigarette holder blocks slide on the three slide rails 109 of the first air filter screen 114 while compressing the respective springs 107. When the cigarette 10 is pulled out, the three cigarette holder blocks move inwardly along the three slide rails under the action of the springs 107, while returning to the initial position under the limiting action of the limit positions of the three limit blocks 115. When a cigarette having a larger circumference is used, the amount of compression of the three springs 107 increases, and the cigarette can still be holded stably. The upper end of the flue insulation jacket 101 is provided with a highly flexible temperature-resistant sealing pad 117, which has the beneficial effects as follows: when cigarettes with different circumferences are inserted, the sealing effect of the air flow is still ensured, and the air flow passing through the cigarette is ensured to all enter from the bottom of the smoking set and output from a filter tip of the cigarette; and at the same time, the flue 102 has a certain length, which ensures that the adaptive airflow heating smoking set can accommodate cigarettes with different circumferences and lengths.
As shown in FIG. 7, the first cavity 202 and the second cavity 203 of the airflow heating assembly 2 are connected by screws to form the completed airflow and heating cavity, and the cavity insulation sleeve 201 is installed at the outer periphery of the airflow and heating cavity to be in interference fit with the cavity, which has the beneficial effects as follows: the airflow heating assembly is kept insulated and the energy is saved. The airflow channel 204 is arranged inside the second cavity 203, and the airflow channel 204 is shaped the same as the Tesla valve, which has the beneficial effects as follows: the airflow heating distance is increased, and the airflow direction is guaranteed to be in from the bottom of the airflow heating assembly 2 and out from the upper part; at the same time, there is a certain acceleration function when the air flow passes through the airflow channel 204 in the shape of the Tesla valve; the heating strip 205 is printed in the airflow channel 204, which has the beneficial effects as follows: the heating efficiency is improved while reducing the size of the heating assembly; and the airflow channel and the heating strip are also arranged in the first cavity 202, and are mirror-symmetrical to those in the second cavity 203.
Four temperature sensors are arranged in the flue, and a control method for the smoking set is as follows: after a consumer inserts a cigarette, the cigarette is holded by the three cigarette holder blocks, and heating is performed by the heating strip 205 to a temperature T₀ after energization, and the temperature T₀ is less than the volatilization temperature of smoke in the cigarette core segment, and the smoke loss of the cigarette core segment will not be caused. The ducted fan 4 is started to output an air flow, and a gas flow rate V₀ is detected by the gas flow rate sensor 116 arranged in the flue. The four temperature sensors arranged inside the flue have temperatures T₁₀, T₂₀, T₃₀, and T₄₀, respectively, from the top down, a heat interception coefficient ξ of the cigarette core segment of the cigarette can be obtained according to the relationship between V₀ and T₁₀, T₂₀, T₃₀, and T₄₀, and a corresponding flow rate curve L is matched according to the heat interception coefficient ξ. Heating is then performed by the heating strip 205 in the airflow heating assembly 2 to a temperature T₀₁, and the temperature T₀₁ can volatilize the smoke in the cigarette core segment, so that a whole pre-heating process is completed. After the puffing sensor 108 detects the situation that the consumer puffs the cigarette, a signal is transmitted to the ducted fan 4, and the ducted fan 4 outputs a flow rate according to a flow rate curve L preheated in a preheating phase; the ducted fan 4 is only triggered to start during the puffing process, and is shut down during the puffing interval to avoid smoke waste. At the same time, the heating assembly 2 performs continuous heating according to the preset heating curve, detection of the puff number is performed by the puffing sensor 108, and puff number data detected by the puffing sensor 108 is fed back to the heating assembly 2 and the ducted fan 4 in real time to correct the flow rate curve L and the heating curve. Different gas flow rates correspond to different heated parts of the cigarette core segment of the cigarette 10, and when the gas flow rate is larger, the heating of the cigarette core segment is closer to the upper part, and the four temperature sensors detect the heating temperatures of the four parts of the cigarette core segment and transmit the signal to the ducted fan 4 to ensure maximum utilization of the cigarette core segment. Preferably, heating the cigarette core segment from top to bottom can avoid the burnt smell caused by excessive baking at the lower end of the cigarette core segment, so that the air supply rate of the ducted fan 4 decreases stepwise. When the four temperature sensors detect that the temperatures sequentially reach the target value, smoke release of the entire cigarette core segment is completed, and the puffing is ended.
The present invention continues to be explained by taking a heated cigarette 10 with a larger circumference, a higher length and a thin sheet cigarette core segment as an example. The cigarette 10 is inserted into the smoking set, and the three cigarette holder blocks are forced to move along the slide rails 109 toward the inner wall of the flue 102, while compressing the three springs 107 to hold the cigarette 10. The highly flexible temperature-resistant sealing pad 117 on the flue insulation jacket 101 is closely fitted with the filter tip of the cigarette 10 to guarantee sealing. Heating is performed by the heating strip 205 in the airflow heating assembly 2 to T₀, the ducted fan 4 is started to output an air flow, and the gas flow rate V₀ is detected by the gas flow rate sensor 116. The four temperature sensors 110, 111, 112 and 113 arranged inside the flue have temperatures T₁₀, T₂₀, T₃₀, and T₄₀, respectively, from the top down, a heat interception coefficient ξ of the cigarette core segment of the cigarette can be obtained according to the relationship between V₀ and T₁₀, T₂₀, T₃₀, and T₄₀, and a corresponding flow rate curve L is matched according to the heat interception coefficient ξ. Heating is then performed by the heating strip 205 in the airflow heating assembly 2 to a temperature T₀₁, so that a whole pre-heating process is completed. After the puffing sensor 108 detects the situation that the consumer puffs the cigarette, a signal is transmitted to the ducted fan 4, and the ducted fan 4 outputs a flow rate according to a flow rate curve L preheated in a preheating phase. The ducted fan 4 is only triggered to start during the puffing process, and is shut down during the puffing interval to avoid smoke waste. At the same time, the heating assembly 2 performs continuous heating according to the preset heating curve, detection of the puff number is performed by the puffing sensor 108, and puff number data detected by the puffing sensor 108 is fed back to the heating assembly 2 and the ducted fan 4 in real time to correct the flow rate curve L and the heating curve. The four temperature sensors separately perform temperature detection on an upper part, a middle upper part, a middle lower part, and a lower part of the cigarette core segment, the temperatures of the upper part, the middle upper part, the middle lower part, and the lower part of the cigarette core segment are T₁, T₂, T₃, and T₄, respectively, and the upper part of the cigarette core segment is first heated at a faster gas flow rate, and real-time feedback is performed by the temperature sensor at the upper part of the cigarette core segment, and after the heating is completed, the middle upper part, the middle lower part, and the lower part of the cigarette core segment are heated separately, and real-time feedback adjustment is performed by the temperature sensors at the respective parts, so that the entire puffing process is completed. A corresponding relationship between a gas flow rate of the heated cigarette with a larger circumference, a higher length and a thin sheet cigarette core segment and the puff number is as shown in FIG. 10, and it can be seen that the gas flow rate decreases as the puff number increases. A relationship between the detected temperatures T₁, T₂, T₃, and T₄ of the upper part, the middle upper part, the middle lower part, and the lower part of the cigarette core segment and the entire puffing time is is shown in FIG. 11, it can be seen that curves showing the detected temperatures of the upper part, the middle upper part, the middle lower part, and the lower part of the cigarette core segment all increase first to reach a peak value and then decrease. However, the temperature peak times of the four parts of the cigarette core segment are different, the time to reach the peak temperature in the upper part, the middle upper part, the middle lower part, and the lower part of the cigarette core segment increases in sequence, which means that different parts of the cigarette core segment are heavily baked at different times, thereby increasing the utilization rate of the cigarette core segment, and avoiding the burnt smell caused by repeated baking of one part, causing bad experience.
The above are only preferred embodiments of the present invention, and it should be noted that the above preferred embodiments should not be regarded as limiting the present invention, and the protection scope of the present invention should be subject to the scope defined by the claims. For those of ordinary skill in the art, several improvements and modifications can be made without departing from the spirit and scope of the present invention, and should also be regarded as the protection scope of the present invention.

Claims

An adaptive airflow heating smoking set, characterized by comprising a flue assembly (1), an airflow heating assembly (2), a connecting piece (3), a ducted fan (4) and a smoking set base (5), wherein the flue assembly (1) is arranged at an upper portion of the airflow heating assembly (2); a lower end of the airflow heating assembly (2) is connected with the ducted fan (4) through the connecting piece (3); and the ducted fan (4) is arranged on the smoking set base (5).
The adaptive airflow heating smoking set according to claim 1, characterized in that the flue assembly (1) comprises: a plurality of cigarette holder blocks, a first air filter screen (114), a flue (102) and a flue insulation jacket (101); the plurality of the cigarette holder blocks have the same size and shape, are in the shape of a cylindrical wall split in an axial direction, and have an upper end wall surface being in the shape of an inward slope; the plurality of the cigarette holder blocks are vertically arranged to form a cylindrical shape with a variable cylinder diameter, an outer periphery of the cylindrical shape is the cylindrical flue (102), and an outer periphery of the flue (102) is the flue insulation jacket (101); a bottom of each cigarette holder block is provided with a respective slide rail (109), and a middle of an outer wall of each cigarette holder block is provided with a spring (107); each spring (107) is fixed to an inner wall of the flue (102) by a spring base (106); each slide rail (109) is provided with a limit block (115); the first air filter screen (114) is fixedly arranged on a bottom of the flue (102); and the slide rails (109) and the limit blocks (115) are mounted on the first air filter screen (114).
The adaptive airflow heating smoking set according to claim 2, characterized in that a puffing sensor (108) and a gas flow rate sensor (116) are installed at a lower end of the flue (102); a flexible sealing pad (117) is installed at an upper end port of the flue insulation jacket (101); and a plurality of temperature sensors are arranged on an inner wall of one of the cigarette holder blocks.
The adaptive airflow heating smoking set according to claim 3, characterized in that three cigarette holder blocks are provided, and are respectively a first cigarette holder block (103), a second cigarette holder block (104) and a third cigarette holder block (105); four temperature sensors are provided, are equidistantly arranged on an inner wall of the first cigarette holder block (103), and are respectively a first temperature sensor (110), a second temperature sensor (111), a third temperature sensor (112) and a fourth temperature sensor (113) from top to bottom; and surfaces of the four temperature sensors are in direct contact with a tobacco (10) inserted in the flue (102).
The adaptive airflow heating smoking set according to claim 1, characterized in that the airflow heating assembly (2) comprises a cavity insulation sleeve (201), a first cavity (202) and a second cavity (203); the first cavity (202) and the second cavity (203) are combined together to form a completed airflow and heating cavity; the cavity insulation sleeve (201) wraps around a periphery of the airflow and heating cavity; an airflow channel (204) is arranged inside the second cavity (203), and the airflow channel (204) is shaped the same as a Tesla valve; a heating strip (205) is printed in the airflow channel (204); and an airflow channel and a heating strip are also arranged in the first cavity (202), and are mirror-symmetrical to those in the second cavity (203).
The adaptive airflow heating smoking set according to claim 1, characterized in that the connecting piece (3) has a rectangular interface at an upper end and external threads at a lower end; the rectangular interface at the upper end of the connecting piece (3) is in interference fit with a rectangular hole in a lower end of the airflow heating assembly (2), and the external threads at the lower end are connected with the ducted fan (4) through internal threads; and a second air filter screen (8) is installed in an air inlet at a bottom end of the ducted fan (4).
The adaptive airflow heating smoking set according to claim 1, characterized by further comprising a battery (6), a support frame (7) and a smoking set shell (9), wherein the support frame (7) is fixed inside the smoking set shell (9), and the support frame (7) is configured to fixedly mount the battery (6) and the airflow heating assembly (2); and the smoking set shell (9) and the smoking set base (5) are connected together by a fastener.
A method for using an adaptive airflow heating smoking set, characterized by using the smoking set according to any one of claims 1 to 7, and comprising the steps of:
inserting a cigarette (10) into a cylindrical space formed by a first cigarette holder block (103), a second cigarette holder block (104) and a third cigarette holder block (105) along a ramp-shaped mouth; performing heating by a heating strip (205) in an airflow heating assembly (2), starting a ducted fan (4) to output an air flow, and detecting a gas flow rate by a gas flow rate sensor (116); measuring four temperatures from top to bottom by a first temperature sensor (110), a second temperature sensor (111), a third temperature sensor (112) and a fourth temperature sensor (113); obtaining a heat interception coefficient of a cigarette core segment of the cigarette (10) according to a relationship between the gas flow rate and the four temperatures; and matching a corresponding flow rate curve according to the heat interception coefficient, and then performing heating by the heating strip (205) to a required temperature, thereby completing a whole pre-heating process; and

transmiting, by a puffing sensor (108), a signal to the ducted fan (4) when smoking the cigarette (10), and outputting a gas flow rate by the ducted fan (4) according to a flow rate curve preheated in a preheating phase; while performing continuous heating by the heating assembly (2) according to a preset heating curve; feeding back puff number data detected by the puffing sensor (108) to the heating assembly (2) and the ducted fan (4) in real time to correct the flow rate curve and the heating curve; and separately performing temperature detection on an upper part, a middle upper part, a middle lower part, and a lower part of the cigarette core segment of the cigarette (10) by the four temperature sensors, first heating the upper part of the cigarette core segment at a faster gas flow rate, and after the heating is completed, separately heating the middle upper part, the middle lower part, and the lower part of the cigarette core segment, and performing real-time feedback adjustment by the temperature sensors at the respective parts, thereby finally completing the entire puffing process.