• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    an arrangement of induction coils (11) is disclosed for use with apparatus for heating smokable material to volatilize at least one component of the smokable material. the induction coil arrangement (1) comprises a plate (10) containing first and second opposite sides (11, 12), a first flat spiral coil (21) of electrically conductive material mounted on the first side of the plate, and a second flat spiral coil (22) of electrically conductive material mounted on the second side of the plate.
    公开号:BR112019020525A2
    申请号:R112019020525
    申请日:2018-03-27
    公开日:2020-05-05
    发明作者:Fallon Gary；Darryn White Julian；Daniel Horrod Martin；Abi Aoun Walid
    申请人:British American Tobacco Investments Ltd；
    IPC主号:
    专利说明:

    INDUCTION COIL ARRANGEMENT,
    STRUCTURE, APPARATUS AND SYSTEM
    Technical field [0001] The present invention relates to apparatus for heating smokable material to volatilize at least one component of the smokable material, for induction coil arrangements for use with apparatus for heating smokable material to volatilize at least one component of the smokable material and for systems comprising articles comprising smokable material and apparatus for heating the material to volatilize at least one component of the smokable material.
    State of the art [0002] Smoking articles, such as cigarettes, cigars and the like, burn tobacco during use to create tobacco smoke. Attempts have been made to provide alternatives to these articles, creating products that release compounds without burning. Examples of such products are so-called non-burning heating products or tobacco heating devices or products, which release compounds by heating, but not by burning material. The material can be, for example, tobacco or other non-tobacco products, which may or may not contain nicotine.
    Petition 870190097704, of 09/30/2019, p. 13/58
    2/34
    Summary [0003] A first aspect of the present invention provides an induction coil arrangement for use with an apparatus for heating smokable material to volatilize at least one component of the smokable material, the induction coil arrangement comprising:
    a plate containing first and second opposite sides;
    a first flat spiral coil of electrically conductive material mounted on the first side of the plate; and a second flat spiral coil of electrically conductive material mounted on the second side of the plate.
    [0004] In an exemplary embodiment, the induction coil arrangement comprises an electrically conductive connector that electrically connects the first flat spiral coil to the second flat spiral coil. In an exemplary embodiment, the electrically conductive connector extends from a radially inner end of the first flat spiral coil to a radially inner end of the second flat spiral coil.
    [0005] In an exemplary embodiment, when viewed from one side of the induction coil arrangement, the first flat spiral coil follows a clockwise path from a radially internal end of the first flat spiral coil, and the second flat spiral coil follows a counterclockwise path from a radially internal end of the second flat spiral coil.
    Petition 870190097704, of 09/30/2019, p. 14/58
    3/34 [0006] In an exemplary embodiment, the induction coil arrangement comprises a laminate, wherein the laminate has a first layer comprising the first flat spiral coil and a second layer comprising the second flat spiral coil. The first and second layers can be spaced apart, such as by an intermediate layer of laminate. When supplied, the intermediate layer must be electrically insulating. In an exemplary embodiment, the laminate is or comprises a printed circuit board.
    [0007] In an exemplary embodiment, each of the first and second flat spiral coils is a rectangular, square coil. In another exemplary embodiment, each of the first and second flat spiral coils is a circular coil.
    [0008] In an exemplary embodiment, the first and the second flat spiral coils are axially aligned with each other.
    [0009] In an exemplary embodiment, the plate is flat or substantially flat.
    [0010] A second aspect of the present invention provides a structure comprising plural induction coil arrangements according to the first aspect of the present invention and a retainer to which the respective plates of the induction coil arrangements are connected to secure the coil arrangements induction in position in relation to each other.
    Petition 870190097704, of 09/30/2019, p. 15/58
    4/34 [0011] In an exemplary embodiment, the retainer comprises or houses a controller to control the operation of the flat spiral coils. In an exemplary embodiment, the controller is to control the operation of at least one of the flat spiral coils independently of at least one other flat spiral coil.
    [0012] A third aspect of the present invention provides an apparatus for heating smokable material to volatilize at least one component of the smokable material, the apparatus comprising the induction coil arrangement of the first aspect of the present invention or the structure of the second aspect of the present invention .
    [0013] In an exemplary embodiment, the appliance is a tobacco heating product.
    [0014] A fourth aspect of the present invention provides an apparatus for heating smokable material to volatilize at least one component of the smokable material, the apparatus comprising:
    a heating zone for receiving one or more articles comprising smokable material; and a magnetic field generator to generate variable magnetic fields that penetrate the respective longitudinal portions of the heating zone in use, wherein the magnetic field generator comprises a plurality of flat spiral coils of electrically conductive material arranged sequentially and in
    Petition 870190097704, of 09/30/2019, p. 16/58
    5/34 respective planes along a longitudinal axis of the heating zone.
    [0015] In an exemplary embodiment, the plans are parallel or substantially parallel to each other.
    [0016] In an exemplary embodiment, the heating zone extends through a hole in each of the plurality of flat spiral coils.
    [0017] In an exemplary embodiment, the apparatus has a support, such as an elongated support, for supporting an article comprising smokable material in the holes in the flat spiral coils. In an exemplary embodiment, the support is tubular and surrounds the heating zone. In other embodiments, the support is non-tubular.
    [0018] In an exemplary embodiment, the apparatus has a heating element comprising heating material that is heat-permeable by penetrating with one or more of the variable magnetic fields to heat the heating zone. In an exemplary embodiment, the support is or comprises the heating element.
    [0019] In an exemplary embodiment, the heating material comprises one or more materials selected from the group consisting of: an electrically conductive material, a magnetic material and an electrically conductive magnetic material.
    Petition 870190097704, of 09/30/2019, p. 17/58
    6/34 [0020] In an exemplary embodiment, the heating material comprises a metal or a metal alloy.
    [0021] In an exemplary embodiment, the heating material comprises one or more materials selected from the group consisting of: aluminum, gold, iron, nickel, cobalt, conductive carbon, graphite, simple carbon steel, stainless steel, ferritic stainless steel, steel, copper and bronze.
    [0022] In an exemplary embodiment, the apparatus comprises a controller for controlling the operation of at least one of the flat spiral coils, regardless of at least one other flat spiral coil.
    [0023] In an exemplary embodiment, the magnetic field generator comprises the arrangement of induction coils of the first aspect of the present invention. Accordingly, the plurality of flat spiral coils of electrically conductive material of the magnetic field generator comprises the first and second flat spiral coils of electrically conductive material of the induction coil array.
    [0024] In an exemplary embodiment, the magnetic field generator comprises the structure of the second aspect of the present invention.
    Petition 870190097704, of 09/30/2019, p. 18/58
    7/34 [0025] In an exemplary embodiment, the apparatus is for heating smokable material to volatilize at least one component of the smokable material without burning the smokable material.
    [0026] In an exemplary embodiment, the appliance is a tobacco heating product.
    [0027] A fifth aspect of the present invention provides a system for heating smokable material to volatilize at least one component of the smokable material, the system comprising:
    the apparatus according to the fourth aspect of the present invention; and the article comprising smokable material and to be placed in the heating zone of the apparatus.
    [0028] In an exemplary embodiment, the article is lengthened.
    Brief description of the drawings [0029] The embodiments of the invention will now be described, by way of example only, with reference to the accompanying drawings, in which:
    [0030] Figure 1 shows a schematic perspective view of an example of an induction coil arrangement for use with an apparatus for heating smokable material to volatilize at least one component of the smokable material;
    Petition 870190097704, of 09/30/2019, p. 19/58
    8/34 [0031] Figure 2 shows a schematic cross-sectional view of the induction coil arrangement of Figure 1;
    [0032] Figure 3 shows a schematic perspective view of an example of a structure comprising plural induction coil arrangements of Figure 1 and a retainer to which the respective plates of the induction coil arrangements are connected to secure the coil arrangements of induction in position relative to each other;
    [0033] Figure 4 shows a schematic cross-sectional view of the structure of Figure 3; and [0034] Figure 5 shows a schematic cross-sectional view of an example of a system comprising apparatus for heating smokable material to volatilize at least one component of the smokable material and an article comprising the smokable material and for locating in a heating zone of the device.
    Detailed Description [0035] As used here, the term smokable material includes materials that provide volatilized components after heating, usually in the form of steam or aerosol. Smokable material can be a material that does not contain tobacco or a material that contains tobacco. Smokeable material may, for example, include one or more of the tobacco itself, tobacco derivatives, expanded tobacco, reconstituted tobacco, tobacco extract,
    Petition 870190097704, of 09/30/2019, p. 20/58
    9/34 homogenized tobacco or tobacco substitutes. The smokable material may be in the form of ground tobacco, shredded tobacco, extruded tobacco, reconstituted tobacco, reconstituted smokable material, liquid, gel, gelled leaf, powder or agglomerates, or the like. Smokable material can also include products other than tobacco that, depending on the product, may or may not contain nicotine. Smokable material may comprise one or more humectants, such as glycerol or propylene glycol.
    [0036] As used in this document, the term heating material or heating material refers to the material that is heated by penetration with a variable magnetic field.
    [0037] Induction heating is a process in which an electrically conductive object is heated by penetrating the object with a variable magnetic field. The process is described by Faraday's law of induction and Ohm's law. An induction heater may comprise an electromagnet and a device for passing a variable electric current, such as alternating current, through the electromagnet. When the electromagnet and the object to be heated are properly positioned relatively, so that the resulting variable magnetic field produced by the electromagnet penetrates the object, one or more eddy currents are generated within the object. The object has a resistance to the flow of electric currents. Therefore, when these eddy currents are generated in the object, their flow against the electrical resistance of the object causes the object to be heated. This process is called Joule heating, ohmic or resistive. a
    Petition 870190097704, of 09/30/2019, p. 21/58
    10/34 object that is capable of being heated inductively is known as a susceptor.
    [0038] It was found that, when the susceptor is in the form of a closed electrical circuit, the magnetic coupling between the susceptor and the electromagnet in use is improved, which results in greater or better heating of the Joule.
    [0039] Magnetic hysteresis heating is a process in which an object made of a magnetic material is heated by penetrating the object with a variable magnetic field. A magnetic material can be considered to comprise many magnets of atomic scale or magnetic dipoles. When a magnetic field penetrates this material, the magnetic dipoles align with the magnetic field. Therefore, when a variable magnetic field, such as an alternating magnetic field, for example, produced by an electromagnet, penetrates the magnetic material, the orientation of the magnetic dipoles changes with the variable applied magnetic field. This reorientation of the magnetic dipole causes heat to be generated in the magnetic material.
    [0040] When an object is both electrically conductive and magnetic, the penetration of the object with a variable magnetic field can cause Joule heating and heating by magnetic hysteresis in the object. In addition, the use of magnetic material can strengthen the magnetic field, which can intensify Joule heating and magnetic hysteresis.
    Petition 870190097704, of 09/30/2019, p. 22/58
    11/34 [0041] In each of the above processes, as heat is generated within the object itself, and not by an external heat source by conducting heat, a rapid increase in temperature in the object and a distribution of heat more uniform can be achieved, particularly through the selection of suitable object material and geometry and magnitude and orientation of the appropriate variable magnetic field in relation to the object. In addition, because induction heating and magnetic hysteresis heating do not require a physical connection to be provided between the source of the variable magnetic field and the object, the design freedom and control over the heating profile can be increased and the cost may be less.
    [0042] Referring to Figures 1 and 2, schematic perspective and cross-sectional views of an example of an induction coil arrangement according to an embodiment of the invention are shown. The induction coil arrangement 10 is for use with the apparatus for heating smokable material to volatilize at least one component of the smokable material, such as apparatus 100 shown in Figure 5 and described below.
    [0043] The induction coil arrangement 1 comprises a frame, panel or plate 10 and two flat spiral coils 21, 22 of electrically conductive material, such as copper. In use, a variable electrical current (eg, alternating) is passed through each of the coils 21, 22, in order to create a variable magnetic field (eg, alternating) that is usable to penetrate a heating element to cause
    Petition 870190097704, of 09/30/2019, p. 23/58
    12/34 heating the heating element, as will be described in detail below.
    [0044] Plate 10 has a first side 11 and a second opposite side 12. The first and second sides 11, 12 of plate 10 away from each other. In this embodiment, the plate 10 is substantially flat and the first and second sides 11, 12 are the main sides of the plate 10. The plate 10 must be made of an electrically non-conductive material, such as a plastic material, in order to electrically isolate coils 21, 22 from one another. In this embodiment, plate 10 is made of FR-4, which is a composite material composed of fiberglass fabric with an epoxy resin binder that is flame retardant. A first 21 of the flat spiral coils of electrically conductive material is mounted on the first side 11 of the plate 10 and a second 22 of the flat spiral coils of electrically conductive material is mounted on the second side 12 of the plate 10. Therefore, the plate 10 is located between coils 21, 22.
    [0045] The coils 21, 22 can be fixed to the plate 10 in any suitable way. In this embodiment, the array of induction coils 1 was formed from the printed circuit board (PCI) and thus the first and second flat spiral coils 21, 22 were formed by printing the electrically conductive material on the respective first and second sides 11, 12 of the board or board 10 during the manufacture of the printed circuit board and then removing (as by stripping) selective portions of the electrically conductive material, so that patterns of the electrically conductive material in the form of the first
    Petition 870190097704, of 09/30/2019, p. 24/58
    13/34 and the second flat spiral coils 21, 22 remain on plate 10. Therefore, the first and second flat spiral coils 21, 22 are thin films or electrically conductive material coatings on plate 10.
    [0046] The induction coil arrangement 1 of this embodiment therefore comprises a laminate with a first layer (comprising the first flat spiral coil 21), a second layer (comprising the second flat spiral coil 22) and a third intermediate layer ( plate 10) between the first and the second layer. The plate 10 thus separates the first and second layers. Since the plate 10 is made of non-electrically conductive material, the coils 21, 22 are electrically isolated from each other (except for the electrically conductive connector 30, discussed below). That is, coils 21, 22 are out of contact with each other. In other embodiments, the coils
    21, 22 can be electrically isolated from each other in a different way, as by an air gap between the coils 21,
    22. In some embodiments, coils 21, 22 may be provided on plate 10 in any other suitable manner, as being preformed and then connected to plate 10.
    [0047] In some embodiments, the board 10 may be different from a layer of a PCI. For example, it may be a layer or sheet of material, such as resin or adhesive, that may have dried, cured or solidified.
    [0048]
    The use of coils formed from thin, printed electrically conductive material, as discussed
    Petition 870190097704, of 09/30/2019, p. 25/58
    14/34 above, avoids the need for Litz wire. The latter is made up of many strands of extremely fine wire gathered in a braid, in order to overcome the effects of decreasing the depth of the skin at higher excitation frequencies. Since the strips of a PCI are thin (usually about 38um thick for 10Z Cu and about 76um thick for 20z Cu), their performance at high frequencies may be comparable to that of the Litz wire of equivalent cross-sectional area, but without problems regarding fragility, molding of the Litz wire or connection with other components.
    [0049] The first and second flat spiral coils 21, 22 are exposed on plate 10, which helps to dissipate any heat generated in coils 21, 22 during use. However, in other embodiments, the first and second flat spiral coils 21, 22 can instead be incorporated into the material forming plate 10, to help protect coils 21, 22 from damage during transportation, storage I just.
    [0050] In this embodiment, the induction coil arrangement 1 has an electrically conductive connector 30 that electrically connects the first flat spiral coil 21 to the second flat spiral coil 22. More specifically, the electrically conductive connector 30 extends from a radially inner end 21a of the first flat spiral coil 21 to a radially internal end 22a of the second flat spiral coil 22, so as to connect the coils 21, 22 in series. In this embodiment, the electrically conductive connector 30 is formed as a path through the PCI card 10, in a manner that would be understood
    Petition 870190097704, of 09/30/2019, p. 26/58
    15/34 by the person skilled in the art. In other embodiments, the electrically conductive connector 30 can take a different shape, such as a conductor or electrically conductive wire that is internal or external to the plate 10.
    [0051] In this embodiment, the flat spiral coils 21, 22 are arranged in respective substantially parallel planes. That is, each of the flat spiral coils 21, 22 has a radius (variable) orthogonal to the plane in which the coil 21, 22 is located. In addition, the flat spiral coils 21, 22 are axially aligned with each other. That is, the virtual point from which the path of one of the coils 21, 22 emanates is on the same axis as the virtual point from which the path of the other coil 21, 22 emanates and the axis is orthogonal to each of the respective planes in which the coils 21, 22 meet. In addition, in this embodiment, when viewed from one side of the induction coil arrangement 1, the first flat spiral coil follows a clockwise path from the radially inner end 21a of the first flat spiral coil 21 and the second flat spiral coil 22 follows a counterclockwise path from the radially inner end 22a of the second flat spiral coil 22. In this configuration, the magnetic fields generated by the coils 21, 22 in use reinforce each other, effectively doubling the inductance of the coils 21, and bending the magnetic field along the coil axes.
    [0052] As shown in Figures 1 and 2, an opening 13 extends entirely through the plate 10 from the first side 11 of the plate 10 to the second side 12 of the plate 10. In addition
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    16/34 In addition, each of the flat spiral coils 21, 22 is wound around a hole that is substantially aligned with the opening 13 through the plate 10. That is, there is a hole in the center of each of the flat spiral coils 21 , 22. Each part of the opening 13 and the holes is a through hole. The variable magnetic fields generated by the coils 21, 22 in use can be used to penetrate a heating element located in opening 13 and / or one or both holes, as will be described in more detail below.
    [0053] The thickness, measured from the first and second sides 11, 12 of the plate 10, of each of the first and second flat spiral coils 21, 22 can be, for example, greater than 50 micrometers and less than 200 micrometers , such as about 70 micrometers, about 100 micrometers or about 140 micrometers. In other embodiments, one or each of the coils 21, 22 can have a thickness of less than 50 micrometers or more than 200 micrometers. The chosen thickness will help to determine the resistance of the coils 21, 22 and the degree to which the coils 21, 22 self-heat in use. The thickness of the plate 10, measured between the first and second sides 11, 12 of the plate 10, can, for example, be less than 2 millimeters, such as less than 1 millimeter.
    [0054] Although, in principle, more than two flat spiral coils can be supplied in the respective layers of a PCI, due to thermal conduction, the outer layers of a PCI have a current carrying capacity two to three times greater than any layers internal PCI. Therefore, a
    Petition 870190097704, of 09/30/2019, p. 28/58
    17/34 double coil structure as described above provides a balance between performance and complexity. In addition, in this embodiment, each of the coils 21, 22 is a round or circular flat spiral coil. In other embodiments, one or each of the coils 21, 22 could be a flat rectangular (e.g. square) spiral coil. Although the rectangular profile coils have a slightly higher inductance for a given profile, the circular coils can be more easily interleaved and / or may have components packaged between them, leading to an overall increase in the use of the PCI area. A rectangular profile also required a longer path length for a given strength of the magnetic field along the coil axis, which increases strength and reduces the Q value compared to a circular coil of similar width.
    [0055] In some embodiments, two or more of the induction coil arrangements described above are provided as part of a structure that also comprises a retainer for the induction coil arrangements to be wired or connected. The retainer can hold the induction coil arrangements in a fixed position in relation to each other, in relation to the retainer, and / or in relation to any other components fixed to the retainer.
    [0056] For example, Figures 3 and 4 show schematic views in perspective and in cross-section of an example of a structure according to an embodiment of the invention. Frame 50 is for use with an apparatus for heating smokable material to volatilize at least one component of the material
    Petition 870190097704, of 09/30/2019, p. 29/58
    18/34 smokable, as the apparatus 100 shown in Figure 5 and described below.
    The structure 50 of this embodiment comprises from the first to the fifth induction coil arrays la, lb, 1c, Id, le, each of which is identical to the induction coil arrangement 1 shown in Figures 1 and 2. The structure 50 also comprises a retainer 52 to which the respective plates 10 of the induction coil arrangements la, 1b, 1c, Id, l and are attached to fix the induction coil arrangements la, 1b, 1c, Id, l and in position one in relation to the other. In this embodiment, retainer 52 is printed in 3D by SLS (selective laser sintering). In other embodiments, the retainer 2 can be formed in any other suitable manner, such as from a PCI, or from any other suitable material. In this embodiment, the retainer 52 comprises a base 54 and the induction coil arrangements la, 1b, 1c, Id, l and extend away from the base 54 in an orthogonal or normal direction to a surface of the base 54.
    [0058] In this embodiment, the induction coil arrangements la, 1b, 1c, Id, l and are separate components from the retainer 52 and are assembled together with the retainer 52 during the formation of the structure 50. Each of the arrangements of the induction coil induction la, 1b, lc, Id, le comprises electrical connectors 23 for both electrically connecting the coils 21, 22 of circuits and for anchoring the induction coil arrangements la, 1b, 1c, ld, le to the retainer 52. In other embodiments, each of the la, lb, 1c, Id, l and arrangements may comprise electrical connectors for connecting coils 21, 22 to the circuits and one or more
    Petition 870190097704, of 09/30/2019, p. 30/58
    19/34 additional structural connectors for anchoring the induction coil arrangements la, lb, Ic, Id, le to retainer 52. In still other variations of this embodiment, retainer 52 can be integrally formed with plates 10 (and, in some cases, also with the coils 21, 22) of the induction coil arrangements la, 1b, 1c, ld, le.
    [0059] As shown in Figures 3 and 4, the retainer 52 maintains the induction coil arrangements la, 1b, 1c, ld, l with respect to each other, so that the spiral coils 21, 22 of the coil arrangements of induction la, 1b, 1c, ld, l and l are arranged sequentially and in the respective planes along an axis AA. In this embodiment, the flat spiral coils 21, 22 of the induction coil arrays la, 1b, 1c, ld, l and are in respective respective substantially parallel planes, each of which is orthogonal to the A-A axis. In addition, the flat spiral coils 21, 22 are all axially aligned with each other, since the respective virtual points from which the paths of the coils 21, 22 emanate are all on a common axis, in this case the AA axis. In addition, the holes 13 through the respective plates 10 are all axially aligned with each other, and all are on the same axis A-A so that from the respective virtual points the paths of the coils 21, 22 emanate.
    [0060] In this embodiment, frame 50 comprises a controller (not shown) to control the operation of the flat spiral coils 21, 22. The controller is housed in retainer 52 and comprises an integrated circuit (Cl), but in other embodiments the controller it can take a different form.
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    20/34
    In some embodiments, the controller controls the operation of at least one of the induction coil arrays la, lb, 1c, Id, le, regardless of at least one other induction coil arrangement la, lb, 1c, Id, le. For example, the controller can supply electrical power to coils 21, 22 of each of the induction coil arrays la, lb, 1c, Id, le, independently of coils 21, 22 of the other induction coil arrays la, lb, 1c, Id, le. In some embodiments, the controller can supply electrical power to coils 21, 22 of each of the induction coil arrays la, lb, 1c, Id, l and sequentially. Alternatively, in at least one operating mode, the controller can control the operation of all induction coil arrays la, lb, 1c, Id, l and simultaneously.
    [0061] The retainer 52 further comprises three arms 55, 56, 57 that extend away from the base 54 in an orthogonal or normal direction to a surface of the base 54 and substantially parallel to the induction coil arrangements la, lb, 1c, Id, le. In this embodiment, the arms 55, 56, 57 are printed in 3D by nylon SLS (selective laser sintering) and are integral with the base 52. In other embodiments, the arms 55, 56, 57 can be separate components from the base 54, which are assembled together with base 54.
    [0062] Each of the arms 55, 56, 57 has an opening 55a, 56a, 57a through it and in each of the openings 55a, 56a, 57a is located an annular ring or shim 55b, 56b, 57b. Each of the shims 55b, 56b, 57b is made of a dielectric or electrically insulating material, such as ether polyether
    Petition 870190097704, of 09/30/2019, p. 32/58
    21/34 ketone (PEEC) or glass. PEEC has a relatively high melting point compared to most other thermoplastics and is highly resistant to thermal degradation. Each of the shims 55b, 56b, 57b defines an orifice 55c, 56c, 57c through it. The holes 55c, 56c, 57c are all on the same axis A-A so that from the respective virtual points emanate the paths of the coils 21, 22.
    [0063] The frame 50 also comprises an elongated support 130 to support, in use, an article comprising smokable material. In this embodiment, the support 130 is tubular and has a longitudinal axis that is coaxial with the axis A-A. In other embodiments, support 130 may be non-tubular. The support 130 is held in position by the shims 55b, 56b, 57b and extends through the holes in the plurality of flat spiral coils 21, 22, through the holes 55c, 56c, 57c in the shims 55b, 56b, 57b, through the openings 55a, 56a, 57a on the arms 55, 56, 57, and through the openings 13 in the plates 10. The shims 55b, 56b, 57b help prevent the elongated support 130 from coming into contact with the induction coil arrangements la, lb , 1c, Id, le, and particularly the coils 21, 22 thereof.
    [0064] In this embodiment, the support 130 comprises heating material that is heat-penetrable with varied magnetic fields to heat an interior volume of the support 130. More specifically, in use, the respective variable magnetic fields generated by the coils 21, 22 penetrate the support 130. Consequently, the respective parts of the heating element 130 are heated by penetration with the
    Petition 870190097704, of 09/30/2019, p. 33/58
    22/34 respective variable magnetic fields. The support 130, therefore, acts as a heating element in use. The controller can be configured to cause heating of the respective parts of the heating element 130, for example, at different respective times, for different respective durations and / or at different respective rates.
    [0065] In other embodiments, support 130 may be free of heating material. For example, in some embodiments, support 130 may be made of electrically non-conductive material, such as glass or plastic. In still other embodiments, support 130 can be omitted.
    [0066] With reference to Figure 5, a schematic cross-sectional view of an example of a system according to an embodiment of the invention is shown. The system 1000 comprises an article 70 comprising smokable material 72 and an apparatus 100 for heating the smokable material 72 to volatilize at least one component of the smokable material 72. In this embodiment, the smokable material 72 comprises tobacco, and the apparatus 100 is a product of tobacco heating (also known in the art as a tobacco heating device or non-burning heating device).
    [0067] In this embodiment, the smokable material 72 is in the form of a rod, and the article 70 comprises a cap 74 around the smokable material 72. The cap 74 surrounds the smokable material 72 and helps to protect the smokable material 72 from damage during transport and use of article 70. During use, cap 74
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    23/34 can also help direct the flow of air into and through the smokable material 72 and can help direct the flow of vapor or aerosol through and out of the smokable material 72. In this embodiment, the cap 74 comprises a housing that is wrapped around the smokable material 72, so that the free ends of the wrapper overlap. The wrapper thus forms all or most of a circumferential outer surface of the article 70. The wrapper can be formed from paper, reconstituted tobacco, aluminum or the like. The cap 74 also comprises an adhesive (not shown) that adheres the overlapping free ends of the wrapper to each other. The adhesive may comprise one or more components, for example, gum arabic, natural or synthetic resins, starches and varnishes. The adhesive helps prevent the overlapping free ends of the wrapper from separating. In other embodiments, the adhesive and / or cap 74 can be omitted. In still other embodiments, the article may take a different form from any of the ones discussed above.
    [0068] In general, the apparatus 100 comprises a long heating zone 110 for receiving the article 70, and a magnetic field generator 120 for generating variable magnetic fields, which penetrate the respective portions 110a, 110b, 110c, HOd , IlOe of heating zone 110 in use. In this embodiment, the heating zone 110 comprises a recess for receiving the article 70. The article 70 can be inserted into the heating zone 110 by a user in any suitable manner, such as through a slot in the wall of the apparatus 100, or by moving first a portion of the apparatus 100, such as a mouthpiece, to access
    Petition 870190097704, of 09/30/2019, p. 35/58
    24/34 the heating zone 110. In other embodiments, the heating zone 110 may be different from a recess, such as a shelf, surface or projection, and may require a mechanical mating with the article to cooperate or receive the article . In this embodiment, the heating zone 110 is dimensioned and configured to accommodate the entire article 70. In other embodiments, the heating zone 110 can be dimensioned to receive only a portion of the article 70 in use.
    [0069] The apparatus 100 has an air inlet (not shown) that fluidly connects the heating zone 110 with the external side of the apparatus 100 and an outlet (not shown) to allow the volatilized material to pass from the heating zone 110 to the outer side of the device 100 in use. A user may be able to inhale the volatilized components of the smokable material 72 by pulling the volatilized components through the outlet. As the volatilized components are removed from the heating zone 110, air can be drawn into the heating zone 110 through the air inlet of the apparatus 100. A first end 111 of the heating zone 110 is closest to the outlet and a the second end 112 of the heating zone 110 is closest to the air inlet.
    [0070] The magnetic field generator 120 comprises a plurality of flat spiral coils 21-22 of electrically conductive material arranged sequentially and in respective planes along a longitudinal axis HH of the heating zone 110. More specifically, the magnetic field generator 120 of the apparatus 100 comprises the structure 50 of the
    Petition 870190097704, of 09/30/2019, p. 36/58
    25/34
    Figures 3 and 4, in which the plurality of flat spiral coils 21, 22 of the magnetic field generator 120 are the respective pairs of coils 21, 22 of the induction coil arrays 1a, 1b, 1c, Id, le. The connectors 30 of the induction coil arrays la, 1b, 1c, Id, l and are omitted from Figure 5, for clarity. The induction coil arrangements 1, 1, 1, 1, 1, 1, 1, 1 and 1 involve the respective portions 110a, 110b, 110c, HOd, 11 and heating zone 110. It will be appreciated that the planes on which the coils 21, 22 are substantially parallel each other. In addition, the planes are all substantially orthogonal to the longitudinal axis H-H of the heating zone 110 and the heating zone 110 extends through the hole in the respective flat spiral coils 21, 22.
    [0071] The longitudinal axis of the support 130 is coaxial with the longitudinal axis HH of the heating zone 110. In other embodiments, the support 130 may be non-tubular and / or may only partially involve the heating zone 110. For example, the support can be an element or pin that penetrates the heating zone 110, so as to be surrounded by the heating zone 110.
    [0072] In this embodiment, the apparatus 100 comprises a controller 6 for controlling the operation of the flat spiral coils 21, 22. The controller 6 can, for example, control the operation of one of the flat spiral coils 21, 22 independently of at least one another of the flat spiral coils 21, 22, thereby to cause induction heating of the respective parts of the heating element 130. In some
    Petition 870190097704, of 09/30/2019, p. 37/58
    26/34 embodiments, the controller 6 can supply electrical power to the coils 21, 22 of each of the induction coil arrays la, 1b, 1c, ld, l and sequentially.
    [0073] Although not shown, the magnetic field generator 120 also comprises an electrical power source (not shown) and a user interface (not shown) for user operation of controller 6. In this embodiment, the electrical power source is a rechargeable battery. In other embodiments, the electrical power source may be different from a rechargeable battery, such as a non-rechargeable battery, a capacitor, or a connection to an electrical power source.
    [0074] Controller 6 is electrically connected between the electrical power source and the coils 21, 22 of the induction coil arrays la, 1b, 1c, ld, le and is communicatively connected to the user interface, which can be located on the device 100. The controller 6 is operated in this embodiment by the user operation of the user interface. The user interface may comprise a push button, a toggle switch, a dial, a touchscreen or the like.
    [0075] In this embodiment, the operation of the user interface by a user causes the controller 6 to cause an alternating electric current to pass through one or more of the coils 21, 22 of the induction coil arrangements la, 1b, 1c , ld, le, in order to cause the arrangement or each coil 21, 22 to generate an alternating magnetic field. The coils 21, 22 and the heating element 130 are relatively positioned so that the
    Petition 870190097704, of 09/30/2019, p. 38/58
    27/34 alternating magnetic fields produced by coils 21, 22 penetrate the heating material of the heating element 130. When the heating material of the heating element 130 is an electrically conductive material, it can cause the generation of one or more currents of Foucault in the heating material. The flow of eddy currents in the heating material against the electrical resistance of the heating material causes the heating material to be heated by Joule heating. In addition, when the heating material is made of a magnetic material, the orientation of the magnetic dipoles in the heating material changes with the change of the applied magnetic field, which causes heat to be generated in the heating material.
    [0076] In this embodiment, article 70 is elongated with a longitudinal axis B-B. When the article 70 is located in the heating zone 110 in use, this BB axis is coaxial or parallel to the longitudinal axis HH of the heating zone 110. Consequently, the heating of one or more parts of the heating element 130 causes heating of a or more of the corresponding parts 110a, 110b, 110c, HOd, 11O and heating zone 110. This in turn causes heating of one of the more corresponding sections 72a, 72b, 72c, 72d, 72e of the smokeable material 72 of article 70, when article 70 is located in heating zone 110.
    [0077] In some embodiments, controller 6 is operable to cause heating of a first section of smokable material 72 before heating of the second section of material
    Petition 870190097704, of 09/30/2019, p. 39/58
    28/34 smokable 72. That is, controller 6 can be operable to cause a variable electric current to pass through one or both coils 21, 22 of a first of the induction coil arrangements 1 to initiate the volatilization of, at least one component of the first section of the smokable material 72 adjacent to the first array of induction coils and the formation of an aerosol thereon, rather causing a variable electric current to pass through one or both coils 21, 22 of a second arrangement of induction coils 1 to initiate the volatilization of at least one component of the second section of smokable material 72 adjacent to the second arrangement of induction coils 1 and formation of an aerosol therein. Consequently, progressive heating of the smokable material 72 of article 70 can be provided over time.
    In some embodiments, the first induction coil arrangement 1 and the associated first section of the smokable material 72 may be those 1, 72a closest to the first end 111 of the heating zone 110 and the second induction coil arrangement 1 and second section associated with the smokable material 72 may be closer to the second end 112 of the heating zone 110. This helps to allow the formation of an aerosol and the relatively quick release of article 70 in the first section 72a of the smokable material 72 relatively close to the outlet, by inhalation by a user, it still provides time-dependent aerosol release, so that the aerosol continues to be formed and released even after the first section 72a of the smokable material 72 has stopped generating aerosol. Such an interruption of aerosol generation may occur as a result of depletion
    Petition 870190097704, of 09/30/2019, p. 40/58
    29/34 of volatile components of the first section 72a of the smokable material 72.
    [0078] The apparatus 100 may comprise a temperature sensor (not shown) for detecting a temperature of the heating zone 110 or of article 70 or of the heating element 130. The temperature sensor can be connected communicatively to the controller 6, so that controller 6 is able to monitor the temperature. Based on one or more signals received from the temperature sensor, controller 6 can adjust a characteristic of the variable or alternating electrical current passed through coils 21, 22 as needed to ensure that the temperature of the smokable material 72 remains within a predetermined temperature range. The characteristic can be, for example, amplitude or frequency or duty cycle. Within the predetermined temperature range, in use, the smokable material 72 is heated enough to volatilize at least one component of the smokable material 72 without burning the smokable material 72. Therefore, controller 6 and apparatus 100 as a whole are arranged to heat the smokable material 72 to volatilize at least one component of the smokable material 72 without burning the smokable material 72.
    [0079] In some embodiments, the temperature range is about 150 ° C to about 300 ° C. The temperature range can be greater than 150 ° C or greater than 200 ° C or greater than 250 ° C, for example. The temperature range can be less than 300 ° C, or less than 290 ° C, or less than 250 ° C, for example. In some
    Petition 870190097704, of 09/30/2019, p. 41/58
    30/34 embodiments, the upper limit of the temperature range can be greater than 300 ° C. In some embodiments, the temperature sensor can be omitted.
    [0080] In variations of this embodiment, support 130 can be penetrable by less than all the variable magnetic fields in use. In some of these variations, the non-penetrated parts of the support 130 can be heated in use by thermal conduction from the penetrated parts of the support 130.
    [0081] In other embodiments, the support and the heating element of the apparatus can be separate components. For example, the support can be a non-magnetic and / or electrically non-conductive element, and the heating element can be a rod or pin that penetrates the heating zone 110, so as to be surrounded by the heating zone 110. The support it may, for example, be a tube of plastic material (such as PEEC) or glass that surrounds the heating zone 110. In some embodiments, the elongated support may be omitted.
    [0082] In still other embodiments, article 70 may include at least one heating element comprising heating material which is heatable in use by penetration with one or more of the variable magnetic fields to heat the smokable material 72 of article 70. O ( s) heating element (s) of article 70 would be in thermal contact and, in some embodiments, surface contact with the smokable material 72 of article 70. For example, a heating element of such article can be elongated and extend to from a first
    Petition 870190097704, of 09/30/2019, p. 42/58
    31/34 end of the article to a second opposite end of the article. The heating element of the article can be tubular or rod-shaped, for example. In some of these embodiments, the smokable material may be tubular and may be radially inward or radially outward from the tubular heating element of the article. In some embodiments, article 70 may include heating material which is dispersed within the smokable material 72 of article 70. For example, article 70 may include a material comprising a mixture of smokable material 72 and elements, wherein each of the elements comprises heating material that can be heated by penetration with a variable magnetic field. Each of the elements may comprise a closed circuit of heating material. Some or each of the elements may be ring-shaped, spherical or formed from a plurality of discrete heating material wires, for example.
    [0083] In some embodiments in which the article includes a heating element, the apparatus 100 is free of a heating element that is penetrable by the magnetic fields produced by the coils 21, 22. In other embodiments, each of the apparatus 100 and the article 70 may comprise a heating element. For example, in the variation of the embodiment illustrated in Figure 5, the article 70 may also comprise a tubular or rod-shaped heating element. Any of the above described ways of operating the system 1000 shown in Figure 5 can be used correspondingly in other embodiments.
    Petition 870190097704, of 09/30/2019, p. 43/58
    [0084] In some embodiments, apparatus 100 is sold, supplied or otherwise provided separately from article 70 with which apparatus 100 is usable. However, in some embodiments, the apparatus 100 and one or more of the articles 70 may be supplied together as a system, as a kit or a set, possibly with additional components, such as cleaning utensils.
    [0085] In each of the embodiments described above, article 70 is a consumable article. Once all, or practically all, volatilizable components of the smokable material 72 in article 70 have been consumed, the user can remove article 70 from heating zone 110 of appliance 1 00 and discard article 70. The user can subsequently reuse the appliance 100 with another of the articles 70. However, in other respective embodiments, the article may not be consumable and the apparatus and article may be discarded together once the volatilizable components of the smokable material have been consumed.
    [0086] In each of the embodiments discussed above, the heating material is steel. However, in other embodiments, the heating material may comprise one or more materials selected from the group consisting of: an electrically conductive material, a magnetic material and an electrically conductive magnetic material. In some embodiments, the heating material may comprise a metal or a metal alloy. In some embodiments, the heating material may comprise one or more materials selected from the group that
    Petition 870190097704, of 09/30/2019, p. 44/58
    33/34 consists of: aluminum, gold, iron, nickel, cobalt, conductive carbon, graphite, simple carbon steel, stainless steel, ferritic stainless steel, copper and bronze. Other heating materials can be used in other embodiments. In some embodiments in which the heating material comprises iron, such as steel (for example, mild steel or stainless steel), the heating element (such as support 130) can be coated to help prevent corrosion or oxidation of the heating element in use. Such a coating may, for example, comprise nickel coating, gold coating or a coating of a ceramic or an inert polymer.
    [0087] In each of the embodiments described above, the smokable material comprises tobacco. However, in the respective variations of each of these embodiments, the smokable material may consist of tobacco, may consist substantially entirely of tobacco, may comprise tobacco and smokable material other than tobacco, may comprise smokable material other than tobacco or may be free tobacco. In some embodiments, the smokable material may comprise a vapor or aerosol-forming agent or a humectant, such as glycerol, propylene glycol, triacetin or diethylene glycol.
    [0088] In order to address various issues and advance the technique, the entirety of this disclosure shows, by way of illustration and example, several embodiments in which the claimed invention can be practiced and which provide superior induction coil arrangements for use with apparatus for heating smokable material to volatilize at least one component of the material
    Petition 870190097704, of 09/30/2019, p. 45/58
    34/34 smokable, upper apparatus for heating smokable material to volatilize at least one component of the smokable material and upper systems comprising that apparatus. The advantages and characteristics of the disclosure are only a representative sample of the achievements and are not exhaustive and / or exclusive. They are presented only to help understand and teach resources claimed and otherwise disclosed. It should be understood that advantages, embodiments, examples, characteristics, structures, and / or other aspects of the disclosure should not be considered limitations on disclosure, as defined by the claims or limitations of equivalents to the claims, and that other embodiments may be used and modifications may be made without departing from the scope and / or spirit of the disclosure. Various embodiments can suitably comprise, consist or consist of the essence of various combinations of the elements, components, characteristics, parts, steps, means, etc. disclosed. The disclosure may include other inventions not currently claimed, but which may be claimed in the future.
    权利要求:
    Claims (21)
    [1]
    1. Arrangement of induction coils for use with apparatus for heating smokable material to volatilize at least one component of the smokable material, the induction coil arrangement characterized by the fact that it comprises:
    a plate containing first and second opposite sides;
    a first flat spiral coil of electrically conductive material mounted on the first side of the plate; and a second flat spiral coil of electrically conductive material mounted on the second side of the plate.
    [2]
    2. Arrangement of induction coils according to the claim
    1, characterized by the fact that it comprises an electrically conductive connector that electrically connects the first flat spiral coil to the second flat spiral coil.
    [3]
    3. Arrangement of induction coils according to the claim
    2, characterized in that the electrically conductive connector extends from a radially internal end of the first flat spiral coil to a radially internal end of the second flat spiral coil.
    [4]
    4. Induction coil arrangement according to any of claims 1 to 3, characterized in that, when viewed from one side of the induction coil arrangement, the first flat spiral coil follows a clockwise path from a radially inner end of the first flat spiral coil, and the second flat spiral coil following a
    Petition 870190097704, of 09/30/2019, p. 47/58
    2/5 counterclockwise travel from a radially internal end of the second flat spiral coil.
    [5]
    Arrangement of induction coils according to any one of claims 1 to 4, characterized in that it comprises a laminate, wherein the laminate has a first layer comprising the first flat spiral coil and a second layer comprising the second spiral coil flat.
    [6]
    6. Structure characterized by the fact that the plural induction coil arrangements as defined in any one of claims 1 to 5 and a retainer to which the respective plates of the induction coil arrangements are attached to fix the induction coil arrangements in position in relation to each other.
    [7]
    7. Apparatus for heating smokable material to volatilize at least one component of the smokable material, the apparatus characterized by the fact that it comprises the arrangement of induction coils as defined in any one of claims 1 to 5 or the structure as defined in claim 6.
    [8]
    8. Apparatus for heating smokable material to volatilize at least one component of the smokable material, the apparatus characterized by the fact that it comprises:
    a heating zone for receiving one or more articles comprising smokable material; and a magnetic field generator to generate variable magnetic fields that penetrate the respective longitudinal portions of the
    Petition 870190097704, of 09/30/2019, p. 48/58
    3/5 heating zone in use, in which the magnetic field generator comprises a plurality of flat spiral coils of electrically conductive material arranged sequentially and in the respective planes along a longitudinal axis of the heating zone.
    [9]
    Apparatus according to claim 8, characterized in that the planes are substantially parallel to each other.
    [10]
    Apparatus according to either of claims 8 or 9, characterized in that the heating zone extends through a hole in each of the plurality of flat spiral coils.
    [11]
    Apparatus according to claim 10, characterized in that it contains an elongated support element for supporting an article comprising a smokable material in the holes in the flat spiral coils.
    [12]
    12. Apparatus according to claim 11, characterized in that the support is tubular and surrounds the heating zone.
    [13]
    Apparatus according to any one of claims 8 to 12, characterized by the fact that it has a heating element comprising heating material that is heated by penetration with one or more of the variable magnetic fields to heat the heating zone.
    Petition 870190097704, of 09/30/2019, p. 49/58
    4/5
    [14]
    Apparatus according to claim 13 when dependent on claim 11 or claim 12, characterized in that the support comprises the heating element.
    [15]
    Apparatus according to either of claims 13 or 14, characterized in that the heating material comprises one or more materials selected from the group consisting of: an electrically conductive material, a magnetic material and an electrically conductive magnetic material.
    [16]
    Apparatus according to any one of claims 13 to 15, characterized in that the heating material comprises a metal or a metal alloy.
    [17]
    Apparatus according to any one of claims 13 to 16, characterized in that the heating material comprises one or more materials selected from the group consisting of: aluminum, gold, iron, nickel, cobalt, conductive carbon, graphite, steel simple carbon, stainless steel, ferritic stainless steel, steel, copper and bronze.
    [18]
    Apparatus according to any one of claims 8 to 17, characterized in that it comprises a controller for controlling the operation of at least one of the flat spiral coils independently of at least one other flat spiral coil.
    Petition 870190097704, of 09/30/2019, p. 50/58
    5/5
    [19]
    19. Apparatus according to any one of claims 8 to
    18, characterized by the fact that the magnetic field generator comprises the structure as defined in claim 6.
    [20]
    Apparatus according to any one of claims 7 to
    19, characterized by the fact that the apparatus is a tobacco heating product.
    [21]
    21. System for heating smokable material to volatilize at least one component of the smokable material, the system characterized by the fact that it comprises:
    the apparatus as defined in any of claims 8 to 20; and the article comprising smokable material and to be placed in the heating zone of the apparatus.
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    同族专利:
    公开号 | 公开日
    RU2020123671A|2020-08-25|
    JP2022024011A|2022-02-08|
    JP6978166B2|2021-12-08|
    WO2018178095A1|2018-10-04|
    CA3144824A1|2018-10-04|
    CN110447303A|2019-11-12|
    AU2021203158A1|2021-06-10|
    RU2728518C1|2020-07-30|
    GB201705259D0|2017-05-17|
    KR20190124748A|2019-11-05|
    AU2018241875A1|2019-09-19|
    EP3603336A1|2020-02-05|
    US20210137167A1|2021-05-13|
    CA3057901A1|2018-10-04|
    AU2018241875B2|2021-04-08|
    JP2020512657A|2020-04-23|
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    法律状态:
    2021-08-10| B25A| Requested transfer of rights approved|Owner name: NICOVENTURES TRADING LIMITED (GB) |
    2021-10-19| B350| Update of information on the portal [chapter 15.35 patent gazette]|
    优先权:
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    GBGB1705259.8A|GB201705259D0|2017-03-31|2017-03-31|Induction coil arrangement|
    PCT/EP2018/057813|WO2018178095A1|2017-03-31|2018-03-27|Induction coil arrangement|
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