Aerosol generating device and aerosol generating product

Abstract

The invention discloses an aerosol generating device which comprises a heating cavity (1) and a coil (2), and the heating cavity (1) is used for inserting an aerosol generating product; the coil (2) is arranged on the periphery of the heating cavity (1) and is used for providing a variable magnetic field; the coil (2) is spiral, and the diameter of the middle section of the coil (2) is larger than that of the two ends of the coil (2) in the axial direction. According to the aerosol generating device provided by the invention, the magnetic field generated by the coil in the axial direction is distributed more uniformly, so that the aerosol generating product can obtain uniform heat in each axial region. The problem of local overheating or insufficient heating at the two ends is avoided, and the overall heating effect and heating uniformity are improved. The invention further provides an aerosol generating product which can be used in cooperation with the aerosol generating product.

Description

Technical Field

[0001] The present application relates to the technical field of tobacco heating, and in particular to an aerosol generating device and an aerosol generating product. Background Art

[0002] Heated aerosol generating products are usually used in conjunction with corresponding aerosol generating devices, which heat the device to generate aerosol containing nicotine for consumers to inhale. Compared with the temperature of traditional cigarettes, which is as high as 800°C or above, the heating temperature of heated aerosol generating products usually does not exceed 400°C, which significantly reduces the content of harmful components in the aerosol, reduces the impact on consumer health, and reduces pollution to the environment.

[0003] The aerosol generating device can be heated by induction heating, and an induction coil is correspondingly arranged in the device to provide an alternating magnetic field. Under the alternating magnetic field, conductive materials such as metals generate heat, and the aerosol generating substrate in the aerosol generating product is heated to generate aerosol. Induction heating technology has high heating efficiency and is easy to use, which can improve the experience comfort of aerosol generating products. However, at present, induction heating still has problems such as unstable temperature and poor heating uniformity. Summary of the invention

[0004] In order to solve the above technical problems, the first purpose of the present invention is to provide an aerosol generating device; the second purpose of the present invention is to provide an aerosol generating product; the aerosol generating device provided by the present application has a more uniform magnetic field distribution generated by the coil in the axial direction, so that the aerosol generating product can obtain uniform heat in each axial area. This avoids the occurrence of local overheating or insufficient heating at both ends, and improves the overall heating effect and heating uniformity. The present application also provides an aerosol generating product that can be used in conjunction with the device.

[0005] The technical solution provided by the present invention is as follows: An aerosol generating device comprises a heating chamber, a coil, The heating chamber is used for inserting the aerosol generating article; The coil is arranged at the periphery of the heating chamber and is used to provide a changing magnetic field; The coil is in a spiral shape, and along its axial direction, the diameter of the middle section of the coil is larger than the diameters of the two ends.

[0006] Preferably, the two ends of the coil are respectively a first end and a second end, and the portion of the coil corresponding to the cross section of the center point of its axis is the center circle. The diameters of the first end and the second end are equal; the diameter gradually increases from the first end to the center circle, and the diameter gradually decreases from the center circle to the second end.

[0007] Preferably, the ratio of the first end to the center circle diameter is (0.5-0.8):1.

[0008] Preferably, the diameter of the first end is 8-10 mm and the diameter of the central ring is 10-20 mm.

[0009] Preferably, the pitch of the coil is 1-3 mm.

[0010] Preferably, the height of the coil is 10-15 mm.

[0011] Preferably, it further comprises a shell, in which a power supply and a controller are arranged, and the controller is electrically connected to the coil and the power supply respectively.

[0012] An aerosol generating product, suitable for any of the above-mentioned aerosol generating devices, comprises an aerosol generating section, the aerosol generating section is filled with a smoke-generating substance and is provided with a receptor, The receptor is arranged along the axial direction of the aerosol generating product.

[0013] Preferably, the length of the susceptor is equal to the length of the aerosol generating section and is less than or equal to the height of the coil.

[0014] Preferably, the cross section of the susceptor perpendicular to the axial direction is in a broken line shape.

[0015] The present application provides an aerosol generating device, comprising a heating chamber and a coil. The heating chamber is used for inserting an aerosol generating product. The coil is arranged at the periphery of the heating chamber and is used for providing a changing magnetic field. The coil is spiral-shaped, and along its axial direction, the diameter of the middle section of the coil is greater than the diameter of the two ends.

[0016] In induction heating, in order to achieve greater energy transfer, the number of magnetic flux lines in the area to be heated should be as large as possible. At this time, the denser the magnetic flux, the higher the current generated in the sensor, and the better the heating effect. In the area to be heated, if a solenoid coil with the same diameter is used, the magnetic flux lines are denser in the middle of the coil, so the magnetic field strength in the middle of the coil is high; while the magnetic flux lines at both ends of the coil are sparser, so the magnetic field strength is weak. This irregular magnetic field distribution can cause the middle of the sensor to overheat or the two ends to be insufficiently heated. If the diameter of the middle section of the coil is larger than the diameter of the two ends, the magnetic leakage phenomenon that originally appeared at the two ends can be reduced, so that the magnetic field is concentrated within the length range of the sensor, so that the sensor can be evenly heated. Through the above design, the magnetic field generated by the coil in the axial direction of the present application is more evenly distributed, so that the aerosol-generating product can obtain uniform heat in all axial regions. Avoiding the problem of overheating in the middle or insufficient heating at both ends improves the overall heating effect and heating uniformity.

[0017] The present application also provides an aerosol generating product, which is suitable for any of the aerosol generating devices described above, including an aerosol generating section, in which a smoking substance is filled and a receptor is provided. The receptor is arranged along the axial direction of the aerosol generating product and can generate a large amount of heat in an alternating magnetic field, which can fumigate the smoking substance together with the heat generated by the smoking substance itself, so that the smoking substance produces more aerosol for consumers to inhale. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 is a cross-sectional schematic diagram of an aerosol generating device in an embodiment of the present invention (the cross section is parallel to the axial direction of the coil); Figure 2 is a cross-sectional schematic diagram of an aerosol generating device in an embodiment of the present invention (the cross section is parallel to the axial direction of the coil, and h refers to the height of the coil); Figure 3 is a three-dimensional schematic diagram of a coil in an embodiment of the present invention; Figure 4 Schematic diagram of the combination of an aerosol generating device and an aerosol generating product in an embodiment of the present invention (the cross section is parallel to the axial direction of the coil and the aerosol generating product); Figure 5 is a schematic cross-sectional view of an aerosol generating article in an embodiment of the present invention (the cross section is parallel to the axial direction of the aerosol generating article); Figure 6 Schematic cross-sectional view of an aerosol generating section of an aerosol generating article in an embodiment of the present invention (the cross section is perpendicular to the axial direction of the aerosol generating article); Figure numerals: 1 - heating chamber; 2 - coil; 21 - first end; 22 - second end; 23 - center circle; 3 - shell; 4 - power supply; 5 - controller; 6 - aerosol generating section; 7 - receptor; 8 - smoke-generating substance. DETAILED DESCRIPTION

[0020] In order to enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below. Obviously, the described embodiments are only part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0021] It should be noted that when an element is referred to as being "fixed on" or "set on" another element, it can be directly on the other element or indirectly set on the other element; when an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0022] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0023] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, "multiple" and "several" mean two or more, unless otherwise clearly and specifically defined.

[0024] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the conditions under which this application can be implemented. Therefore, they have no substantive technical significance. Any structural modification, change in proportional relationship or adjustment of size should still fall within the scope of the technical content disclosed in this application without affecting the effects and purposes that can be achieved by this application.

[0025] As shown in the figure, an embodiment of the present invention provides an aerosol generating device, including a heating chamber 1, a coil 2, The heating chamber 1 is used for inserting the aerosol generating product; The coil 2 is arranged on the periphery of the heating chamber 1 and is used to provide a changing magnetic field; The coil 2 is in a spiral shape, and along its axial direction, the diameter of the middle section of the coil 2 is larger than the diameters of the two ends.

[0026] Through research and analysis, the applicant found that induction heating has problems of non-constant temperature and poor heating uniformity. The reason is that the induction coil used in the existing device is usually in the shape of a spiral tube with a constant diameter. Since the current flows in each turn of the coil and generates a magnetic field, according to Ampere's loop law, the magnetic field at the center of the solenoid is relatively uniform, and the direction is parallel to the axis of the coil. However, the strength of the magnetic field changes with the distance from the axis of the coil. Outside the coil, the magnetic field strength is weak and the magnetic field lines are spread out, so the distribution of the electric field and the magnetic field will be relatively uneven. At the same time, at both ends of the coil, due to the edge effect, the distribution of the magnetic field will change significantly. The magnetic lines of force near the edge cannot be completely closed, resulting in a weakening of the magnetic field strength, and the field lines expand outward, which in turn causes the spatial unevenness of the magnetic field, making the temperature of the two end areas of the sensor lower, while the temperature of the middle part is higher, affecting the uniformity of heating and the efficiency of aerosol generation.

[0027] In response to the above problems, the present application provides an aerosol generating device, including a heating chamber 1 and a coil 2. The heating chamber 1 is used for inserting an aerosol generating product; the coil 2 is arranged on the outer periphery of the heating chamber 1 to provide a changing magnetic field; the coil 2 is spiral-shaped, and along its axial direction, the diameter of the middle section of the coil 2 is greater than the diameter at both ends.

[0028] In induction heating, in order to achieve greater energy transfer, the number of magnetic flux lines in the area to be heated should be as large as possible. At this time, the denser the magnetic flux, the higher the current generated in the sensor, and the better the heating effect. In the area to be heated, if a solenoid coil with the same diameter is used, the magnetic flux lines are denser in the middle of the coil, so the magnetic field strength in the middle of the coil is high; while the magnetic flux lines at both ends of the coil are sparser, so the magnetic field strength is weak. This irregular magnetic field distribution can cause overheating in the middle of the sensor or insufficient heating at both ends. If the diameter of the middle section of the coil is larger than the diameter at both ends, the magnetic leakage phenomenon that originally appeared at both ends can be reduced, so that the magnetic field is concentrated within the length range of the sensor, so that the sensor can be evenly heated. Through the above design, the magnetic field generated by the coil 2 in the axial direction is more evenly distributed in the present application, so that the aerosol generating product can obtain uniform heat in each axial area. Avoiding the problem of overheating in the middle or insufficient heating at both ends improves the overall heating effect and heating uniformity.

[0029] When current passes through the coil 2, the generated magnetic field can penetrate the aerosol-generating product in the heating chamber 3, thereby achieving induction heating thereof. The multi-turn coil can increase the intensity of the generated magnetic field by increasing the effective area of ​​the coil, thereby improving the heating effect of the aerosol-generating product. The number of turns of the coil 2 can be determined according to actual needs, and can be 4-20 turns, such as 6-16 turns.

[0030] The heating chamber 3 is used for inserting the aerosol generating product. The heating chamber 3 itself needs to have good high temperature resistance. Generally speaking, it will not be damaged or deformed at about 200-250°C, and will not produce harmful substances. The material of the heating chamber 3 can be a metal material or a non-metal material. Commonly used non-metal materials include high temperature resistant silicone, polytetrafluoroethylene, polyetheretherketone, polyimide, etc.

[0031] Preferably, the two ends of the coil 2 are respectively a first end 21 and a second end 22, and the portion of the coil 2 corresponding to the cross section of the center point of its axis is a center circle 23. The diameters of the first end 21 and the second end 22 are equal; the diameter gradually increases from the first end 21 to the center circle 23 , and the diameter gradually decreases from the center circle 23 to the second end 22 .

[0032] It is further preferred that the diameter of the coil 2 gradually increases from one end and gradually decreases in the middle. Specifically, the two ends of the coil 2 are named the first end 21 and the second end 22, respectively, and the portion of the coil 2 corresponding to the cross section of the center point of its axis is named the center circle 23. The diameters of the first end 21 and the second end 22 are equal; the diameter gradually increases from the first end 21 to the center circle 23, and the diameter gradually decreases from the center circle 23 to the second end 22.

[0033] The distinction between the first end 21, the second end 22, and the center circle 23 is for the convenience of describing the relationship of diameter change, and there is no need to distinguish between the two ends of the coil 2. Similarly, the center circle 23 is just a name for a circle of the cross section of the coil 2 corresponding to the center point of its axis, and this circle may or may not have a turn of coil passing through it. When there is a turn of coil passing through, the diameter of the turn of coil passing through the center circle 23 is the largest; when no coil passes through the center circle 23, the diameter of the two turns of coil located on both sides of the center circle 23 is the largest.

[0034] Preferably, the ratio of the diameter of the first end 21 to that of the center ring 23 is (0.5-0.8):1.

[0035] More preferably, the ratio of the diameter of the first end 21 to that of the center circle 23 is (0.5-0.8):1, and the diameters of the first end 22 and the first end 21 are equal, then the ratio of the diameter of the center circle 23 to that of the second end 22 is also (0.5-0.8):1, the diameter of the center circle 23 is large, and the diameters of the first end 21 and the second end 22 are small.

[0036] Preferably, the diameter of the first end 21 is 8-10 mm, and the diameter of the center ring 23 is 10-20 mm.

[0037] Preferably, the diameter of the first end 21 is 8-10 mm, the diameter of the center ring 23 is 10-20 mm, and the diameters satisfy the above ratio of (0.5-0.8): 1. For example, the diameter of the first end 21 is 9 mm, the diameter of the center ring 23 is 12 mm, the ratio is 0.75: 1, and the ratio is satisfied. The diameters of the first end 21 and the center ring 23 may also be other values.

[0038] Preferably, the pitch of the coil 2 is 1-3 mm.

[0039] Preferably, the pitch of the coil 2 is 1-3 mm, more preferably 1.5-2 mm.

[0040] Preferably, the height of the coil 2 is 10-15 mm.

[0041] Preferably, the height of the coil 2 is 10-15 mm, more preferably 11-13 mm, for example 12 mm. The height of the coil 2 is the distance between the two ends of the coil along the axial direction, that is, the vertical distance from the first end 21 to the second end 22.

[0042] Preferably, it further comprises a shell 3 , in which a power supply 4 and a controller 5 are arranged, and the controller 5 is electrically connected to the coil 2 and the power supply 4 respectively.

[0043] The aerosol generating device provided in the present application also includes a shell 2, which encloses a heating chamber 3, and a power supply 4 and a controller 5 are also provided in the shell. The controller 5 is electrically connected to the coil 2 and the power supply 4 respectively. The current provided by the power supply 4 is converted into a high-frequency pulse current through the controller 5 and transmitted to the coil 2 to generate an alternating magnetic field.

[0044] A magnetic shielding layer may also be provided outside the coil 2 .

[0045] The power source 4 may use a lithium battery commonly used in the art, and the output voltage is usually around 3.7V~4.2V.

[0046] The controller 5 can use circuits and other structures known in the art to convert the current into the required high-frequency alternating current, such as using an inverter circuit to convert direct current into a high-frequency pulse current. In addition, in order to improve the efficiency of power conversion and obtain a more stable high-frequency current, a resonant circuit can be added to form a resonant state. The inverter circuit is usually composed of a power switch tube and a related drive circuit. The drive circuit will generate a high-frequency drive signal to control the conduction and cutoff of the power switch tube. When the power switch tube performs a switching action according to the high-frequency control signal, the direct current will be cut into a high-frequency pulse current. The resonant circuit is composed of an inductor and a capacitor, which can interact with the inductor and capacitor in the inverter circuit to form a resonant state. Finally, the current frequency in the coil 2 can be in the range of 1~30MHz, preferably in the range of 1~10MHz.

[0047] The controller 5 can also perform overall control over the operation of the aerosol generating device. By setting sensors, the power-on state of the coil 2, including the magnitude of the current and the power-on time, can be monitored and controlled, thereby accurately controlling the heating temperature. In addition, the working mode of the device can be automatically adjusted according to preset parameters and information fed back by the sensor to adapt to different usage requirements and material properties.

[0048] An aerosol generating product, suitable for any of the above-mentioned aerosol generating devices, comprises an aerosol generating section 6, the aerosol generating section 6 is filled with a smoke-generating substance 8, and is provided with a receptor 7, The receptor 7 is arranged along the axial direction of the aerosol generating product.

[0049] The present application also provides an aerosol generating product, which is suitable for any of the aerosol generating devices described above, including an aerosol generating section 6, the aerosol generating section 6 is filled with a smoking substance 8, and is provided with a receptor 7, which is arranged along the axial direction of the aerosol generating product and can generate a large amount of heat in an alternating magnetic field to heat the smoking substance 8, so that the smoking substance 8 produces more aerosol for consumers to inhale.

[0050] Specifically, the heating mechanism of the sensor 7 may be that under the action of the alternating magnetic field of the coil 2, an induced eddy current is generated inside, the resistance of the sensor 7 is increased, and its own heat is greatly increased; or the heating mechanism of the sensor 7 may also be that the iron crystals in the sensor material are repeatedly magnetized and demagnetized by the alternating magnetic field, resulting in rapid flipping of the magnetic domains, causing hysteresis loss, and then generating more heat. The sensor can be made of the required material according to actual use requirements, and it only needs to control the heating of the sensor through an external device, so that aerosol is generated in the aerosol generation section. The sensor material is usually a conductive material, preferably low-carbon steel, low-alloy steel, stainless steel, copper alloy, aluminum alloy, titanium alloy, graphite, etc.

[0051] The aerosol generating product provided by the present application has a higher heating efficiency. However, the aerosol generating device provided by the present application is also applicable to the heating of existing aerosol generating products that are not provided with the receptor 7.

[0052] Preferably, the length of the susceptor 7 is equal to the length of the aerosol generating section 6 and is less than or equal to the height of the coil 2 .

[0053] Preferably, the length of the susceptor 7 is equal to the length of the aerosol generating section 6 (i.e., the susceptor 7 runs through the aerosol generating section 6). At the same time, the length of the susceptor 7 and the aerosol generating section 6 is less than or equal to the height of the coil 2, so that the entire aerosol generating section 6 is surrounded by the coil 2 and can be fully heated.

[0054] In addition to the aerosol generating section 6, the aerosol generating product may also be provided with a filtering section to filter the aerosol through the built-in acetate fiber bundle and other materials. In addition, a supporting section, a cooling section, etc. existing in the art may also be provided.

[0055] Preferably, the cross section of the sensor 7 perpendicular to the axial direction is in a broken line shape.

[0056] Preferably, the cross section of the susceptor 7 perpendicular to the axial direction is in a broken line shape, more preferably in an M shape, so that the heat can be fully dissipated to the smoking material 8 filled at the periphery.

[0057] Example 1 An aerosol generating device comprises a heating chamber 1, a coil 2, and a housing 3. The heating chamber 1 is used for inserting the aerosol generating product; The coil 2 is arranged on the periphery of the heating chamber 1 to provide a changing magnetic field; the coil 2 is spiral-shaped and along its axial direction, The two ends of the coil 2 are respectively a first end 21 and a second end 22. The portion of the coil 2 corresponding to the cross section of the center point of its axis is a center circle 23. The diameters of the first end 21 and the second end 22 are equal. The diameter gradually increases from the first end 21 to the center circle 23, and the diameter gradually decreases from the center circle 23 to the second end 22. The diameters of the first end 21 and the second end 22 are 9 mm, and the diameter of the center circle 23 is 12 mm, and the ratio of the two is 0.75:1. The pitch of the coil 2 is 1.5 mm, and the height of the coil 2 is 12 mm. A power supply 4 and a controller 5 are also provided in the housing 3 , and the controller 5 is electrically connected to the coil 2 and the power supply 4 respectively.

[0058] The aerosol generating product suitable for the above-mentioned aerosol generating device comprises an aerosol generating section 6, the aerosol generating section 6 is filled with a smoke-generating substance 8, and is provided with a receptor 7, the receptor 7 is arranged along the axial direction of the aerosol generating product; and the cross section of the receptor 7 perpendicular to the axial direction is M-shaped; The length of the susceptor 7 is equal to the length of the aerosol generating section 6 , both of which are 12 mm, and are equal to the height of the coil 2 .

[0059] The aerosol generating product has a diameter of 7.2 mm and a length of 45 mm, and also includes a supporting section, a cooling section, and a filtering section.

[0060] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An aerosol generating device, characterized in that: It comprises a heating chamber (1), a coil (2), The heating chamber (1) is used for inserting an aerosol generating product; The coil (2) is arranged on the periphery of the heating chamber (1) and is used to provide a changing magnetic field; The coil (2) is spiral-shaped, and along its axial direction, the diameter of the middle section of the coil (2) is greater than the diameters of the two ends.

2. The aerosol generating device according to claim 1, characterized in that: The two ends of the coil (2) are respectively a first end (21) and a second end (22); the portion of the coil (2) corresponding to the cross section at the center point of its axis is a center circle (23). The diameters of the first end (21) and the second end (22) are equal; the diameter from the first end (21) to the center circle (23) gradually increases, and the diameter from the center circle (23) to the second end (22) gradually decreases.

3. The aerosol generating device according to claim 2, characterized in that: The ratio of the diameter of the first end (21) to the diameter of the center ring (23) is (0.5-0.8):

1.

4. The aerosol generating device according to claim 3, characterized in that: The diameter of the first end (21) is 8-10 mm, and the diameter of the center ring (23) is 10-20 mm.

5. The aerosol generating device according to any one of claims 1 to 4, characterized in that: The pitch of the coil (2) is 1-3 mm.

6. The aerosol generating device according to any one of claims 1 to 4, characterized in that: The height of the coil (2) is 10-15 mm.

7. The aerosol generating device according to claim 1, characterized in that: It also comprises a housing (3), wherein a power supply (4) and a controller (5) are arranged in the housing (3), and the controller (5) is electrically connected to the coil (2) and the power supply (4), respectively.

8. An aerosol generating product, suitable for use in the aerosol generating device according to any one of claims 1 to 7, characterized in that: The aerosol generating section (6) is filled with a smoke-generating substance (8) and is provided with a receptor (7). The receptor (7) is arranged along the axial direction of the aerosol generating product.

9. An aerosol generating article according to claim 8, characterized in that The length of the susceptor (7) is equal to the length of the aerosol generating section (6) and is less than or equal to the height of the coil (2).

10. The aerosol-generating article of claim 8, wherein: The cross section of the sensor (7) perpendicular to the axial direction is in the shape of a broken line.

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