An electromagnetic induction recognition and heating cigarette

Abstract

The invention relates to the technical field of tobacco heating, and specifically discloses an electromagnetic induction identification heating cigarette with easy processing, low cost and light weight. The cigarette comprises a cigarette and a heating device, wherein an induction identification body is arranged on the outer surface or inner layer of the cigarette, and the induction identification body is arranged in a ring shape around the cigarette or in a strip shape along the length direction of the cigarette, and the thickness of the induction identification body is 0.05-0.5mm; the heating device comprises a shell with a tubular cavity, a power heating unit arranged on the inner wall of the tubular cavity and heating the cigarette, a power supply, an electromagnetic induction unit for electromagnetic induction identification of the cigarette, and a switch device for starting the electromagnetic induction unit when sliding to open an opening and turning off the power supply when sliding to close the opening; and also comprises an MCU processing unit for controlling the power heating unit to heat the inserted cigarette at a temperature and a heating time according to a signal detected by the electromagnetic induction unit, and a status unit indicating whether the electromagnetic induction unit is working or not and whether the power heating unit is working.

Description

Technical Field

[0001] The present invention relates to the technical field of tobacco heating, and in particular to an electromagnetic induction recognition heating cigarette. Background Art

[0002] Heated cigarettes are tobacco products that use the internal heating element of the heating device to bake the cigarette at low temperature, so that the effective ingredients in the tobacco are baked and released for consumers to smoke. This avoids the production of harmful substances caused by the burning of tobacco during the high-temperature combustion of the cigarette, reducing potential health risks. At present, the heating devices on the market for low-temperature baking of cigarettes generally start the heating mode of the heating device by mechanical button contact after the cigarette is inserted into the baking cavity of the heating device. This type of operation is relatively cumbersome, and users need to press the button frequently, which can easily accelerate the damage of the button.

[0003] In order to improve the convenience of use, Chinese patent CN 113729309 A discloses a tobacco segment and tobacco product that can be inductively heated. The inductive heating of tobacco is achieved by adding a metal element with a hollow column structure to the tobacco segment as a sensor. In this product, the hollow sensor is used to generate heat in an alternating magnetic field and then heat the smoking material filled in the inner and outer rings of the hollow sensor to achieve low-temperature baking of the cigarette. The hollow sensor is used as a heating element. In order to ensure the heating effect of the hollow sensor on the smoking material, the conductivity, size, and material of the hollow sensor are required to be high. Due to the use of central electromagnetic heating, when the sensor size is small, the tobacco heating speed is low. When the sensor size is large, it will occupy the tobacco capacity. In order to ensure the heating effect of the smoking material, the addition of the hollow sensor significantly increases the overall weight of the cigarette, thereby affecting the consumer's hand feeling and smoking experience when holding the cigarette. In addition, the tobacco product requires that the sensor be coaxial with the tobacco segment, which increases the difficulty of tobacco processing and makes it difficult to load the tobacco onto the machine during processing. The metal components that serve as the sensor are easily worn when introduced into the tobacco segment, which places high demands on the manufacturing equipment and is not suitable for large-scale production under current production conditions. Summary of the invention

[0004] Based on this, it is necessary to provide an electromagnetic induction recognition and heating cigarette that is easy to process, low in cost, light in weight, and can perform induction recognition and heating on cigarettes to address the above-mentioned shortcomings.

[0005] An electromagnetic induction identification heated cigarette comprises a cigarette and a heating device for heating the cigarette, wherein the outer surface or inner layer of the cigarette is provided with an induction identification body that can be identified by electromagnetic induction, the induction identification body is arranged in a ring shape around the cigarette, or in a strip shape along the length direction of the cigarette, and the thickness of the induction identification body is 0.05-0.5mm; the heating device comprises a shell having a tube cavity with an opening at one end and into which the cigarette can be inserted, a power heating unit arranged around the inner wall of the tube cavity and heating the cigarette inserted into the tube cavity, a power supply for supplying power to the power heating unit, an electromagnetic induction unit for electromagnetic induction identification of the cigarette inserted into the tube cavity, a switch device arranged at the opening of the tube cavity and used to start the electromagnetic induction unit when sliding to open the opening and turn off the power supply when sliding to close the opening; and also comprises an MCU processing unit for controlling the heating temperature and heating time of the inserted cigarette by the power heating unit according to a signal detected by the electromagnetic induction unit, and a status unit indicating whether the electromagnetic induction unit is working or not and whether the heating unit is working.

[0006] In one embodiment, the control method of the heating smoking device includes:

[0007] S1: Determine whether the switch device is triggered. When the switch device is triggered, the MCU processing unit starts the electromagnetic induction unit;

[0008] S2: Determine whether the electromagnetic induction unit detects an induction identifier that can be identified by electromagnetic induction. If the electromagnetic induction unit does not detect an induction identifier that can be identified by electromagnetic induction within a predetermined time, the MCU processing unit controls the power heating unit to stop heating or keep it in an unheated state, and controls the electromagnetic induction unit to enter a dormant state; if the electromagnetic induction unit continues to detect an induction identifier that can be identified by electromagnetic induction within a predetermined time, the MCU processing unit controls the power heating unit to heat the cigarette.

[0009] In one embodiment, the power heating unit is a heating tube inserted into the tube cavity and electrically connected to the MCU processing unit. The inner ring of the heating tube is used to insert the cigarette, and the lower part of the inner ring of the heating tube is reduced in diameter to form a limiting step for limiting the position of the cigarette.

[0010] In one of the embodiments, the electromagnetic induction unit includes a sleeve that is sleeved on the outer ring of the heating tube and coaxially arranged with the heating tube, a copper coil that is wound on the sleeve and electrically connected to the MCU processing unit, and the copper coil forms an electromagnetic induction area in a preset area in the inner ring of the heating tube after power is turned on.

[0011] In one embodiment, the electromagnetic induction identification heating cigarette also includes a temperature sensor for detecting the temperature of the heating tube and a temperature digital display device for displaying the current temperature of the heating tube.

[0012] In one of the embodiments, the electromagnetic induction identification and heating cigarette further includes a vibration device connected to the MCU processing unit and providing a vibration indication when the state of the state unit changes.

[0013] In one embodiment, the status unit includes an annular colored luminous ring arranged on the top surface of the shell at the edge of the lumen opening, and the annular colored luminous ring indicates that the electromagnetic induction unit is working with a first preset color and indicates that the power heating unit is working with a second preset color.

[0014] In one embodiment, the MCU processing unit includes a control circuit, an operational amplifier conversion circuit and a switching circuit. The control circuit includes an MCU chip. The MCU chip detects the LC oscillation frequency between the copper coil and the inductive identification body through the operational amplifier conversion circuit to determine whether the inductive identification body enters the electromagnetic induction area in the heating tube.

[0015] In one embodiment, the cigarette includes a filter segment, a tobacco segment, and tipping paper connecting the filter segment and the tobacco segment; the sensing identifier is arranged on the filter segment, the tobacco segment, or the tipping paper, or covers part of the filter segment and the tipping paper at the same time, or covers part of the tobacco segment and the tipping paper at the same time; when the sensing identifier is arranged on the filter segment or the tipping paper, the sensing identifier is located at the inner layer, the outer layer, or between the inner and outer layers of the paper tube of the filter segment, or the sensing identifier is located at the inner surface, the outer surface, or between the inner and outer surfaces of the tipping paper.

[0016] In one embodiment, the inductive identification body is a metal foil or a magnetic body or a substrate with an inductive ink layer printed on the surface; the metal foil is made of aluminum foil, copper foil, silver foil, gold foil or tin foil; the thickness of the metal foil is 0.01-2mm; the magnetic body is made of magnetic material, and the magnetic material is iron, cobalt, nickel, iron-cobalt alloy, iron-nickel alloy or cobalt-nickel alloy; the thickness of the magnetic body is 0.01-1mm; the inductive ink layer includes at least one conductive filler layer, and the conductive filler layer is composed of one of metal powder, conductive carbon black, graphite, carbon fiber, ferromagnetic material or nickel powder; the thickness of the inductive ink layer is 0.01-1mm; the inductive identification body is used for the heated smoking device to identify cigarettes, and the identifiable cigarette information includes heating temperature and time, heating temperature curve or heating power curve.

[0017] The electromagnetic induction recognition and heating cigarette of the present invention is implemented by providing a cigarette with a sensing identification body that can be recognized by electromagnetic induction, and providing an electromagnetic induction unit that can sense and identify the sensing identification body on the cigarette and an MCU processing unit that controls the heating temperature and heating time of the power heating unit in the heating device. When the cigarette is inserted into the tube cavity of the heating device, the MCU processing unit automatically identifies and starts heating the cigarette through the signal change judgment transmitted by the electromagnetic induction unit, which meets the plug-and-play requirement and recognizes the information of different cigarettes at the same time, and calls different temperature control programs, which greatly optimizes the user experience. The cigarette has a simple structure and is easy to process, and it only needs to attach the sensing identification body to the surface of the cigarette. The cigarette processing cost is low and the overall weight is light, which is easy to achieve mass production, thereby improving the convenience of smoking heated cigarettes and reducing the operating procedures; shortening the waiting time before use, intelligently selecting the temperature control program, and improving the user experience of consumers. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of the module structure of electromagnetic induction identification and heating cigarettes in one embodiment of the present invention;

[0019] Figure 2 It is a schematic diagram of the structure of a cigarette ready to be inserted into a heating smoking device in one embodiment of the present invention;

[0020] Figure 3 This is a schematic diagram of the cross-sectional structure of a cigarette after being inserted into a heating tube in one embodiment of the present invention;

[0021] Figure 4 This is a schematic diagram of the connection between the electromagnetic induction unit and the heating tube in one embodiment of the present invention;

[0022] Figure 5 The equivalent circuit of the inductive identification body and the copper coil in one embodiment of the present invention;

[0023] Figure 6 A schematic circuit diagram of a heating smoking device in one embodiment of the present invention;

[0024] Figure 7 A circuit diagram of an MCU chip in one embodiment of the present invention;

[0025] Figure 8 is a circuit schematic diagram of an operational amplifier conversion circuit in one embodiment of the present invention;

[0026] Fig. 9 is a circuit schematic diagram of a switch circuit in one embodiment of the present invention;

[0027] Fig.10 A logic judgment diagram for electromagnetic induction identification and heating of cigarettes in one embodiment of the present invention;

[0028] Fig.11 A software control flow chart for electromagnetic induction identification and heating of cigarettes in one embodiment of the present invention;

[0029] Fig.12 A schematic diagram of the structure of a cigarette in one embodiment of the present invention;

[0030] Fig.13 A schematic diagram of the structure of a cigarette in another embodiment of the present invention;

[0031] Fig.14 for Fig.13 A schematic diagram of the cross-sectional structure of a cigarette in the illustrated embodiment;

[0032] Fig.15 A schematic diagram of the structure of a cigarette in another embodiment of the present invention;

[0033] Fig.16 It is a schematic diagram of the structure of a cigarette in another embodiment of the present invention. DETAILED DESCRIPTION

[0034] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0035] Please combine Figure 1-4 The present invention discloses an electromagnetic induction identification heating cigarette, comprising a cigarette 100 and a heating device 200 for heating the cigarette 100, wherein the cigarette 100 is a non-combustion cigarette, and the cigarette 100 is provided with an induction identification body 300 that can be identified by electromagnetic induction, and the induction identification body 300 is used as an identification piece of the cigarette 100. Only when the cigarette 100 provided with the induction identification body 300 is inserted into the heating device 200, can it be identified by the heating device 200 and trigger the corresponding program of the heating device 200, so that the heating device 200 performs low-temperature heating on the cigarette 100. In addition, it should be emphasized that the induction identification body 300 attached to the cigarette 100 of this embodiment has a compact structure and does not destroy the basic structure of the cigarette 100. While realizing the induction identification of the cigarette 100 by the heating device 200, the overall size and weight of the cigarette 100 change little, and it is easy to process and mass-produce.

[0036] The heating smoking device 200 comprises a housing 210 having a tubular cavity 211 with an opening at one end and into which a cigarette 100 can be inserted, a power heating unit 220 arranged around the inner wall of the tubular cavity 211 and heating the cigarette 100 inserted into the tubular cavity 211, a power supply 230 for supplying power to the power heating unit 220, an electromagnetic induction unit 240 for electromagnetically inductively identifying the cigarette 100 inserted into the tubular cavity 211, and a switch device 250 arranged at the opening of the tubular cavity 211 and used to start the electromagnetic induction unit 240 when sliding to open the opening and to turn off the power supply 230 when sliding to close the opening. The power heating unit 220 is accommodated in the tubular cavity 211 and provides a heat source for the cigarette 100, the power supply 230 and the switch device 250 are accommodated in the housing 210 and located outside the tubular cavity 211, and the power supply 230 and the switch device 250 are separated from the tubular cavity 211 by a heat insulation board to avoid damage due to overheating. The electromagnetic induction unit 240 is accommodated in the lumen 211 and cooperates with the power heating unit 220. It should be noted that the extension length of the electromagnetic induction unit 240 along the depth direction of the lumen 211 may be equal to or less than the depth of the lumen 211, and the extension length of the power heating unit 220 along the depth of the lumen 211 is less than or equal to the length of the tobacco segment on the cigarette 100, so as to avoid the power heating unit 220 heating the filter segment of the cigarette 100, causing the filter segment to overheat and then burn the mouth. In addition, in this embodiment, the switch device 250 includes a switch and a sliding cover that is slidably arranged at the outer side of the housing 210 at the opening of the lumen 211 and is used to slide and trigger the switch. The bottom of the sliding cover is provided with a triggering part that slides close to or away from the switch to trigger the switch to open or close. In other words, as long as the sliding cover is opened, the switch is activated and drives the electromagnetic induction unit 240 to work. As long as the sliding cover is closed, the switch disconnects the power supply 230 and the heating tobacco device 200 is turned off.

[0037] Furthermore, the heating smoking device 200 also includes an MCU processing unit 260 that controls the heating temperature and heating time of the inserted cigarette 100 by the power heating unit 220 according to the signal detected by the electromagnetic induction unit 240, and a status unit 270 that indicates whether the electromagnetic induction unit 240 is working and whether the power heating unit 220 is working. The status unit 270 is arranged on the outer surface of the shell 210 and is electrically connected to the MCU processing unit 260 through a connecting line, so that the user can observe the working status of the heating smoking device 200; the MCU processing unit 260 is accommodated in the shell 210 outside the tube cavity 211, and the MCU processing unit 260 is thermally insulated from the tube cavity 211 to prevent the MCU processing unit 260 from overheating. It should be noted that, in this embodiment, for different brands and types of cigarettes 100, sensing recognition bodies 300 of different materials or sizes are respectively set to match them. In this way, when the sensing recognition bodies 300 of different materials or sizes generate electromagnetic induction effects with the electromagnetic induction unit 240, the frequency of the electromagnetic oscillation generated at the electromagnetic induction unit 240 changes. In this way, the MCU processing unit 260 determines the type of cigarette 100 to which the sensing recognition body 300 is attached according to the frequency, and then enters the preset heating program. In the present invention, different heating programs include the heating temperature and heating time for the predetermined cigarette 100, that is, the "identity" (i.e., model) of the cigarette 100 is identified by the sensing recognition body 300, so as to start the heating program that is most suitable for the cigarette 100 to heat the cigarette 100, so that the effective components in the tobacco in the cigarette 100 can be released to the maximum extent.

[0038] In one embodiment, the tube cavity 211 is a circular groove structure extending along the height direction of the housing 210, and the power heating unit 220 is a heating tube inserted in the tube cavity 211 and electrically connected to the MCU processing unit 260. The inner ring of the heating tube is used to insert the cigarette 100, providing a plug-in space and an identification and heating space for the cigarette 100. Further, the inner diameter of the heating tube is slightly larger than the outer diameter of the cigarette 100, so that the cigarette 100 can be smoothly inserted into the heating tube while limiting the position of the cigarette 100, and preventing the cigarette 100 from shaking significantly after being inserted into the heating tube. In this embodiment, the lower part of the inner ring of the heating tube is reduced in diameter to form a limiting step 221 for limiting the position of the cigarette 100, and the distance from the induction recognition body 300 to the bottom of the cigarette 100 (i.e., the end of the tobacco segment) is equal to the distance from the electromagnetic induction unit 240 to the limiting step, or after the cigarette 100 is inserted into the heating tube, the projection of the induction recognition body 300 in the vertical direction falls within the identification area of ​​the electromagnetic induction unit 240. Preferably, a tube body made of stainless steel is inserted at the bottom of the heating tube. While the tube body provides the air required for the combustion of the cigarette 100, the top of the tube is used to provide a limiting step to achieve the positioning of the cigarette 100, so that after the cigarette 100 is inserted into the heating tube, the sensing identification body 300 on the cigarette 100 corresponds to the sensing identification unit.

[0039] In one embodiment, the electromagnetic induction unit 240 includes a sleeve 241 sleeved on the outer ring of the heating tube and coaxially arranged with the heating tube, a copper coil 242 wound on the sleeve 241 and electrically connected to the MCU processing unit 260, and the copper coil 242 forms an electromagnetic induction area in a preset area in the inner ring of the heating tube after power is turned on. In this embodiment, the sleeve is tightly connected to the heating tube, and the winding height of the copper coil 242 on the sleeve 241 is 4.2 mm.

[0040] Furthermore, in this embodiment, the MCU processing unit 260 includes a control circuit, an operational amplifier conversion circuit, a switch circuit, and a converter trigger circuit. The control circuit includes an MCU chip (i.e., the MCU in the circuit diagram). The MCU chip can be a single-chip microcomputer. The MCU chip detects the LC oscillation frequency between the copper coil 242 and the inductive identification body 300 through the operational amplifier conversion circuit to determine whether the inductive identification body 300 enters the electromagnetic induction area in the heating tube. The operational amplifier conversion circuit includes an inductor-to-digital converter (i.e., the LDC in the circuit diagram) for converting the inductor signal into a digital signal. Please refer to Figure 5-9 When the slide cover is opened and the switch is triggered to open (i.e. SW2 in the switch circuit is closed), the MCU chip is powered and provides AC current to the copper coil 242 through the converter trigger circuit. At this time, the copper coil 242 will generate an AC magnetic field in real time and diverge the induction surface (i.e. electromagnetic induction recognition area). When the cigarette 100 with the induction recognition body 300 is inserted into the inner cavity of the heating tube, and the induction recognition body 300 enters the divergent induction surface, due to the electromagnetic field induction principle, eddy currents will be generated on the surface of the induction recognition body 300; the closer the induction recognition body 300 is to the copper coil 242 and the better the induction distance is, the greater the eddy currents will be, and the more obvious the electromagnetic induction effect will be.

[0041] Since the eddy current of the inductive identification body 300 will also generate a magnetic field, the direction of which is opposite to the original magnetic field generated by the copper coil 242 supplying alternating current, the LC oscillation generated by the copper coil 242 and the eddy current is equivalent to a set of coupled inductors, in which the copper coil 242 is equivalent to the main winding, and the eddy current generated by the inductive identification body 300 is equivalent to the secondary inductor. When an alternating current is passed through the copper coil 242, the magnitude and frequency of the alternating current can be set by the MCU chip according to different heating programs, and the operational amplifier conversion circuit connected to the copper coil 242 checks the sine wave frequency generated by the LC oscillation to determine whether the inductive identification body 300 is close to the copper coil 242. As the sensing identifier 300 approaches the copper coil 242, the ratio of the frequency of the copper coil 242 detected by the operational amplifier conversion circuit to the reference frequency will change significantly, and will be converted into a digital signal by the operational amplifier conversion circuit and output to the MCU chip for judgment and processing by the MCU chip. That is, the MCU chip judges the type of cigarette 100 based on the frequency of the copper coil 242 received when the bottom of the cigarette 100 abuts the limit step, and starts the pre-stored heating program corresponding to the type of cigarette 100, and heats the cigarette 100 at a preset heating temperature and heating time.

[0042] In one embodiment, the electromagnetic induction identification heating cigarette further includes a temperature sensor for detecting the temperature of the heating tube and a temperature digital display device for displaying the current temperature of the heating tube. The temperature digital display device is connected to the temperature sensor and the MCU chip respectively and is arranged on the outer surface of the housing 210, so that the user can understand the current heating temperature of the heating device 200. Further, the state unit 270 includes an annular color luminous ring arranged on the top surface of the housing 210 at the edge of the opening of the tube cavity 211. The annular color luminous ring indicates that the electromagnetic induction unit 240 is working with a first preset color and indicates that the power heating unit 220 is working with a second preset color. In this embodiment, when the sliding cover slides and opens the switch, the electromagnetic induction unit 240 is powered on and starts working, and at the same time, the state unit 270 indicates that the heating device 200 is connected to the power supply 230 to start working; when the sliding cover slides and closes the switch, the electromagnetic induction unit 240 and the power heating unit 220 of the heating device 200 are turned off at the same time, and the state unit 270 is powered off and the light is turned off.

[0043] Preferably, when the annular color light ring displays green, it indicates that the electromagnetic induction unit 240 is working to prompt the user to insert the cigarette 100 into the heating tube; when the annular color light ring displays red, it indicates that the power heating unit 220 is working to prompt the user that the cigarette 100 is successfully identified and the heating device 200 is heating the cigarette 100. Further preferably, the electromagnetic induction identification and heating cigarette also includes a vibration device connected to the MCU processing unit 260 and vibrating to indicate when the state of the state unit 270 changes. Preferably, the vibration device is a vibration motor housed in the housing 210 and electrically connected to the MCU chip. In this embodiment, as long as the state indicated by the state unit 270 changes, the MCU chip controls the vibration motor to work. For example, when the cigarette 100 is inserted into the heating tube, the annular colored light ring switches from green to red, and the heating tube starts to heat the cigarette 100. The vibration motor vibrates to remind the user that it is already heating; when the cigarette 100 is taken out of the heating tube, the electromagnetic induction unit 240 does not detect the sensing identifier 300. In this case, the MCU chip controls the heating tube to standby or turn off, the electromagnetic induction unit 240 is still in the power-on state, the annular colored light ring switches from red to green, and the vibration motor vibrates to remind the user that the cigarette 100 has been taken out, so that the user can slide the sliding cover in time to close the opening of the tube cavity 211 and cut off the power supply 230 of the heating device 200 to save electricity.

[0044] It should be noted that the control method of the heating smoking device 200 includes:

[0045] S1: Determine whether the switch device 250 is triggered. When the switch device 250 is triggered, the MCU processing unit 260 starts the electromagnetic induction unit 240;

[0046] S2: Determine whether the electromagnetic induction unit 240 detects the induction recognition body 300 that can be identified by electromagnetic induction. If the electromagnetic induction unit 240 does not detect the induction recognition body 300 that can be identified by electromagnetic induction within a predetermined time, the MCU processing unit 260 controls the power heating unit 220 to stop heating or keep it in an unheated state, and controls the electromagnetic induction unit 240 to enter a dormant state; if the electromagnetic induction unit 240 continues to detect the induction recognition body 300 that can be identified by electromagnetic induction within a predetermined time, the MCU processing unit 260 controls the power heating unit 220 to heat the cigarette 100.

[0047] Further preferably, when the electromagnetic induction unit 240 does not detect the electromagnetically identifiable sensing body 300 for more than 2 seconds, the MCU processing unit 260 controls the power heating unit 220 to stop heating or maintain an unheated state, and controls the electromagnetic induction unit 240 to enter a sleep state to save power.

[0048] Please combine Fig.10 and Fig.11 When electromagnetic induction is used to identify heated cigarettes, the MCU core detects whether the level at the switch changes (i.e., whether it is a high level). If the switch level does not change, the heated tobacco device continues to be in a standby state. If the switch level changes, the inductor-to-digital converter (LDC) in the op amp conversion circuit turns on the scanning state, and the MCU chip receives the signal sent by the op amp conversion circuit and determines whether the electromagnetic induction unit detects that a cigarette with an inductive identifier is inserted into the heating tube. If no signal change is detected, that is, no inductive identifier enters the electromagnetic induction identification area of ​​the electromagnetic induction unit, the heated tobacco device continues to be in a standby state. If a signal change is detected, it is determined whether the change signal changes within a preset time. If it changes within the preset time, it can be determined that the cigarette is mistakenly inserted into the heating tube. At this time, the heated tobacco device continues to be in a standby state. If the change signal lasts for more than the preset time, it is determined that a cigarette with a heating demand is inserted into the heating tube. In this case, the MCU chip controls the heating tube (power heating unit) to work and heat the cigarette. In this process, the MCU chip continuously detects changes in various signals. When each signal continues, the switch is closed or opened for less than a preset time (such as 2 seconds), and the electromagnetic induction unit signal is interrupted for less than a preset time (such as 2 seconds), the MCU chip controls the heating tube to continue heating. When any of the above conditions is not met, the MCU chip controls the heating tube to stop heating.

[0049] See also Fig.12 The cigarette 100 includes a filter segment 110, a tobacco segment 120, and a tipping paper 130 connecting the filter segment 110 and the tobacco segment 120; the filter segment 110 is used to provide a sucking part for the user when using the cigarette 100, including a filter medium 111 for filtering solid matter in smoke and a paper tube 112 wrapped on the outer surface of the filter medium 111, the filter medium 111 is composed of filter threads or velvet threads and twisted into a cylindrical structure, and the shape of the paper tube 112 is adapted to the shape of the filter medium 111 after twisting, that is, the paper tube 112 is a cylindrical structure. The filter medium 111 can also be formed by cutting a loose material having a large number of pores therein. The tobacco segment 120 includes a tubular cigarette paper and tobacco filled in the tubular cigarette paper, and the tobacco is used to release effective substances when heated and mix with the air in the environment to form smoke for the user to smoke. The tipping paper 130 is used to twist and connect the filter segment 110 and the tobacco segment 120 to improve the stability of the cigarette 100 structure.

[0050] The sensing recognition body 300 is attached to the outer surface of the cigarette 100 or is located in the inner layer of the cigarette 100. Further, the sensing recognition body 300 is arranged on the filter segment 110 or the tobacco segment 120 or the tipping paper 130, or covers part of the filter segment 110 and the tipping paper 130 at the same time, or covers part of the tobacco segment 120 and the tipping paper 130 at the same time; when the sensing recognition body 300 is arranged on the filter segment 110 or the tipping paper 130, the sensing recognition body 300 is located in the inner layer, outer layer or between the inner and outer layers of the paper tube 112 of the filter segment 110, or the sensing recognition body 300 is located on the inner surface, outer surface or between the inner and outer surfaces of the tipping paper 130. Further, the sensing recognition body 300 is arranged in a ring shape around the cigarette 100, or is arranged in a strip shape along the length direction of the cigarette 100. Fig.12 The figure shows the situation where the sensor recognition body 300 is arranged on the outer surface of the tobacco segment 120. Fig.13 and Fig.14 The figure shows the situation where the sensor recognition body 300 is arranged on the inner surface of the filter segment 110. Fig.15 The figure shows a situation where the inductive identification body 300 is arranged on the outer surface of the tipping paper 130, wherein: Figure 12-15 In the figure, the sensing identification body 300 is a ring-shaped structure. When the sensing identification body 300 is located on the outer surface of the filter segment 110, the tobacco segment 120 or the tipping paper 130, the sensing identification body 300 is sleeved on the filter segment 110, the tobacco segment 120 or the tipping paper 130 and bonded to the filter segment 110, the tobacco segment 120 or the tipping paper 130. Fig.16 The figure shows a situation where the sensing identification body 300 is arranged in a strip shape on the tobacco segment 120. The arrangement of the sensing identification body 300 in different positions (surface layer or inner layer or middle layer, filter segment 110 or tobacco segment 120 or tipping paper 130) on the cigarette 100, in different shapes (ring or strip), and in different sizes (different area sizes) can refer to the above structure and will not be repeated here.

[0051] It should be noted that when the sensing recognition body 300 is a ring-shaped structure, after the cigarette 100 is inserted into the heating tube of the heating device 200, the sensing recognition body 300 is flush with the electromagnetic induction unit 240, and the electromagnetic induction unit 240 recognizes the sensing recognition body 300 by electromagnetic induction. When the sensing recognition body 300 is a strip-shaped structure attached to the filter segment 110 or the tobacco segment 120 or the tipping paper 130, after the cigarette 100 is inserted into the heating tube of the heating device 200, it is necessary to rotate the cigarette 100 so that the sensing recognition body 300 on the cigarette 100 is flush with the electromagnetic induction unit 240 and is also aligned with the electromagnetic induction unit 240, so that the electromagnetic induction unit 240 can sense and recognize the sensing recognition body 300, avoid the problem of the cigarette 100 being heated by mistake due to the cigarette 100 being inserted into the heating tube of the heating device 200, and improve the reliability of the heating of the cigarette 100.

[0052] In this embodiment, the thickness of the induction recognition body 300 is 0.05-0.5 mm. By setting the thickness of the induction recognition body 300 to 0.05-0.5 mm, while ensuring that it can cooperate with the electromagnetic induction unit 240 to generate eddy currents, the effect of the induction recognition body 300 on the overall thickness of the cigarette 100 is weakened, and the outer surface of the cigarette 100 is prevented from having obvious protrusions, thereby affecting the insertion of the cigarette 100 in the cigarette box and the heating device 200, and at the same time, the effect of the induction recognition body 300 being too thick on the hand feel of the user when holding the cigarette 100 is avoided.

[0053] In one embodiment, the inductive identification body 300 is a metal foil or a magnetic body or a substrate with an inductive ink layer printed on the surface; the metal foil is made of aluminum foil, copper foil, silver foil, gold foil or tin foil; the thickness of the metal foil is 0.01-2mm. Preferably, the metal foil is made of aluminum foil, and the thickness of the metal foil is 0.15mm. The magnetic body is made of a magnetic material, and the magnetic material is iron, cobalt, nickel, iron-cobalt alloy, iron-nickel alloy or cobalt-nickel alloy; the thickness of the magnetic body is 0.01-1mm. The inductive ink layer includes at least one conductive filler layer, and the conductive filler layer is composed of one of metal powder, conductive carbon black, graphite, carbon fiber, ferromagnetic material or nickel powder. The materials of the metal foil and the magnetic body can be selected based on the user's heating speed of the tobacco segment 120 of the cigarette 100 (material conductivity), and the manufacturer's pricing of the cigarette 100 product, material ductility and other factors, which will not be repeated here. The substrate used as the sensing identifier 300 and having a sensing ink layer printed on the surface is cut from wood pulp paper or bamboo pulp paper, that is, the substrate is cut from a paper roll. The thickness of the sensing ink layer is 0.01-1mm; the sensing identifier 300 is used for the heating smoking device 200 to identify the cigarette 100, and the identifiable information of the cigarette 100 includes the heating temperature and time, the heating temperature curve or the heating power curve. When the number of sensing ink layers is greater than one, the conductive filler layers constituting the sensing ink layers are stacked, and the materials of the conductive filler layers can be the same or different. When the materials of the conductive filler layers are different, the conductive filler layers are stacked in order from top to bottom according to the conductivity.

[0054] The electromagnetic induction recognition and heating cigarette of the present invention is implemented by providing a cigarette 100 with a sensing identification body 300 that can be recognized by electromagnetic induction, and providing an electromagnetic induction unit 240 that can sense and identify the sensing identification body 300 on the cigarette 100 and an MCU processing unit 260 that controls the heating temperature and heating time of the power heating unit 220 in the heating smoking device 200. When the cigarette 100 is inserted into the tubular cavity 211 of the heating smoking device 200, the MCU processing unit 260 automatically identifies and starts heating the cigarette 100 through the signal change judgment transmitted by the electromagnetic induction unit 240, which meets the plug-and-play requirement, and at the same time identifies the information of different cigarettes 100 and calls different temperature control programs, which greatly optimizes the use experience. The cigarette 100 has a simple structure and is easy to process, and it only needs to attach the sensing identification body 300 to the surface of the cigarette 100. The cigarette 100 has a low processing cost and a light overall weight, and is easy to achieve mass production, thereby improving the convenience of smoking heated cigarettes and reducing the operating procedures; shortening the waiting time before use, intelligently selecting the temperature control program, and improving the use experience of consumers.

[0055] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0056] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. An electromagnetic induction identification and heating cigarette, comprising a cigarette and a heating device for heating the cigarette, characterized in that: The outer surface or inner layer of the cigarette is provided with an induction recognition body that can be identified by electromagnetic induction. The induction recognition body is arranged in a ring shape around the cigarette or in a strip shape along the length direction of the cigarette, and the thickness of the induction recognition body is 0.05-0.5mm; the heating tobacco device includes a shell having a tube cavity with an opening at one end and into which the cigarette can be inserted, a power heating unit arranged around the inner wall of the tube cavity and heating the cigarette inserted into the tube cavity, a power supply for supplying power to the power heating unit, an electromagnetic induction unit for electromagnetic induction recognition of the cigarette inserted into the tube cavity, a switch device arranged at the opening of the tube cavity and used to start the electromagnetic induction unit when sliding to open the opening and turn off the power supply when sliding to close the opening; and also includes an MCU processing unit for controlling the heating temperature and heating time of the inserted cigarette by the power heating unit according to the signal detected by the electromagnetic induction unit, and a status unit indicating whether the electromagnetic induction unit is working or not and whether the heating unit is working; The control method of the heated smoking device includes: S1: Determine whether the switch device is triggered. When the switch device is triggered, the MCU processing unit starts the electromagnetic induction unit; S2: Determine whether the electromagnetic induction unit detects an induction identifier that can be identified by electromagnetic induction. If the electromagnetic induction unit does not detect an induction identifier that can be identified by electromagnetic induction within a predetermined time, the MCU processing unit controls the power heating unit to stop heating or keep it in an unheated state, and controls the electromagnetic induction unit to enter a dormant state; if the electromagnetic induction unit continues to detect an induction identifier that can be identified by electromagnetic induction within a predetermined time, the MCU processing unit controls the power heating unit to heat the cigarette.

2. The electromagnetic induction identification heating cigarette according to claim 1, characterized in that: The power heating unit is a heating tube inserted into the tube cavity and electrically connected to the MCU processing unit. The inner ring of the heating tube is used to insert the cigarette, and the lower part of the inner ring of the heating tube is reduced in diameter to form a limiting step for limiting the position of the cigarette.

3. The electromagnetic induction identification heating cigarette according to claim 2, characterized in that: The electromagnetic induction unit includes a sleeve sleeved on the outer ring of the heating tube and coaxially arranged with the heating tube, a copper coil wound on the sleeve and electrically connected to the MCU processing unit. After power is turned on, the copper coil forms an electromagnetic induction area in a preset area in the inner ring of the heating tube.

4. The electromagnetic induction identification heating cigarette according to claim 3, characterized in that: The electromagnetic induction identification heating cigarette also includes a temperature sensor for detecting the temperature of the heating tube and a temperature digital display device for displaying the current temperature of the heating tube.

5. The electromagnetic induction identification heating cigarette according to claim 4, characterized in that: The electromagnetic induction identification and heating cigarette also includes a vibration device connected to the MCU processing unit and providing a vibration indication when the state of the state unit changes.

6. The electromagnetic induction identification heating cigarette according to claim 5, characterized in that: The status unit includes an annular colored luminous ring arranged on the top surface of the shell at the edge of the lumen opening. The annular colored luminous ring indicates that the electromagnetic induction unit is working with a first preset color and indicates that the power heating unit is working with a second preset color.

7. The electromagnetic induction identification heating cigarette according to claim 6, characterized in that: The MCU processing unit includes a control circuit, an operational amplifier conversion circuit and a switch circuit. The control circuit includes an MCU chip. The MCU chip detects the LC oscillation frequency between the copper coil and the inductive identification body through the operational amplifier conversion circuit to determine whether the inductive identification body enters the electromagnetic induction area in the heating tube.

8. The electromagnetic induction identification heating cigarette according to claim 7, characterized in that: The cigarette comprises a filter segment, a tobacco segment and tipping paper connecting the filter segment and the tobacco segment; the sensing identifier is arranged on the filter segment, the tobacco segment or the tipping paper, or covers part of the filter segment and the tipping paper at the same time, or covers part of the tobacco segment and the tipping paper at the same time; when the sensing identifier is arranged on the filter segment or the tipping paper, the sensing identifier is located at the inner layer, the outer layer or between the inner and outer layers of the paper tube of the filter segment, or the sensing identifier is located at the inner surface, the outer surface or between the inner and outer surfaces of the tipping paper.

9. The electromagnetic induction identification heating cigarette according to claim 8, characterized in that: The inductive identification body is a metal foil or a magnetic body or a substrate with an inductive ink layer printed on the surface; the metal foil is made of aluminum foil, copper foil, silver foil, gold foil or tin foil; the thickness of the metal foil is 0.01-2mm; the magnetic body is made of magnetic material, and the magnetic material is iron, cobalt, nickel, iron-cobalt alloy, iron-nickel alloy or cobalt-nickel alloy; the thickness of the magnetic body is 0.01-1mm; the inductive ink layer includes at least one conductive filler layer, and the conductive filler layer is composed of one of metal powder, conductive carbon black, graphite, carbon fiber or ferromagnetic material; the thickness of the inductive ink layer is 0.01-1mm; the inductive identification body is used for the heated smoking device to identify cigarettes, and the identifiable cigarette information includes heating temperature and time, heating temperature curve or heating power curve.

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