CN217826789U - Gas mist generating device and heater for gas mist generating device - Google Patents

Abstract

The present application provides an aerosol-generating device and a heater for an aerosol-generating device; wherein the aerosol-generating device comprises: the heater includes: a susceptor comprising a susceptor metal or alloy and capable of being penetrated by a varying magnetic field to generate heat; the susceptor is configured to extend along a length of the heater and at least partially surround the chamber; an electromagnetic induction coil for generating a varying magnetic field; the electromagnetic induction coil is arranged to surround at least a portion of the susceptor and is at least partially supported by the susceptor; a coating at least partially surrounding and encasing the electromagnetic coil to secure or restrain or retain the electromagnetic coil to an outside of the susceptor; and the circuit is used for supplying alternating current to the electromagnetic induction coil so as to enable the electromagnetic induction coil to generate a changing magnetic field. The above aerosol-generating device, the induction coil and the susceptor being integrated in one heater component is advantageous for product miniaturization.

Description

Gas mist generating device and heater for gas mist generating device

Technical Field

The embodiment of the application relates to the technical field of heating non-combustion aerosol generation, in particular to an aerosol generation device and a heater for the aerosol generation device.

Background

Smoking articles (e.g., cigarettes, cigars, etc.) burn tobacco during use to produce tobacco smoke. Attempts have been made to replace these tobacco-burning products by making products that release compounds without burning.

An example of such a product is a heating device that releases a compound by heating rather than burning the material. For example, the material may be an aerosol-generating article comprising tobacco or other non-tobacco products, which may or may not comprise nicotine. Known heating devices induce heating of the susceptor by means of an induction coil, thereby heating the aerosol-generating article; wherein the induction coil and the susceptor are detachably mounted in the heating apparatus independently by supporting or fastening members, respectively.

SUMMERY OF THE UTILITY MODEL

An embodiment of the present application provides an aerosol-generating device configured to heat an aerosol-generating article to generate an aerosol; the method comprises the following steps:

a chamber for receiving an aerosol-generating article;

a heater for heating the aerosol-generating article; the heater includes:

a susceptor comprising a susceptor that is sensitive to metal or alloy and is capable of being penetrated by a varying magnetic field to generate heat; the susceptor is configured to extend along a length of the heater and at least partially surround the chamber;

an electromagnetic induction coil for generating a varying magnetic field; the electromagnetic induction coil is arranged to surround at least a portion of the susceptor and is at least partially supported by the susceptor;

a coating at least partially surrounding and encasing the electromagnetic induction coil to secure or restrain or retain the electromagnetic induction coil outside of the susceptor;

a circuit for providing an alternating current to the electromagnetic coil to cause the electromagnetic coil to generate a changing magnetic field.

In a preferred implementation, the electromagnetic induction coil is not detachable or separable from the susceptor.

In a preferred implementation, the heater comprises an inner surface and an outer surface facing away in a radial direction;

the maximum distance between the inner and outer surfaces is less than 3mm.

In a preferred implementation, the electromagnetic coil comprises 0.2 to 0.8 windings or turns per unit centimeter in the axial direction.

In a preferred implementation, the heater further comprises:

an insulating layer located between the cladding layer and the susceptor to provide thermal insulation therebetween.

In a preferred implementation, the thermal insulation layer comprises an aerogel or porous body material.

In a preferred implementation, the cross-section of the wire material of the electromagnetic induction coil is configured such that the length extending in the axial direction of the electromagnetic induction coil is greater than the length extending in the radial direction.

In a preferred implementation, the heater has first and second ends facing away from each other along the length; the heater further comprises:

a first electrode and a second electrode for guiding a current on a power supply path of the electromagnetic induction coil; wherein, the first and the second end of the pipe are connected with each other,

the first electrode is proximate the first end and at least partially surrounds the susceptor;

the second electrode is proximate the second end and at least partially surrounds the susceptor.

In a preferred implementation, the cladding layer comprises at least one of a glaze or a ceramic or a silicone.

In a preferred implementation, the heater further comprises: an outer support element at least partially surrounding or enveloping the coating.

In a preferred implementation, the frequency of the alternating current is between 200KHz and 500KHz.

Yet another embodiment of the present application also proposes an aerosol-generating device configured to heat an aerosol-generating article to generate an aerosol; the method comprises the following steps:

a chamber for receiving an aerosol-generating article;

a heater for heating the aerosol-generating article; the heater includes:

a non-susceptor substrate configured to extend along a length of the heater and at least partially surround the chamber;

an electromagnetic induction coil comprising a susceptible metal or alloy; the electromagnetic induction coil is arranged to surround and bond to at least a portion of an outer surface of the substrate; the electromagnetic coil and the substrate are thermally conductive to each other;

circuitry for providing an alternating current to the electromagnetic induction coil to excite the electromagnetic induction coil to generate heat which in turn transfers heat to an aerosol-generating article through the substrate to heat the aerosol-generating article.

Yet another embodiment of the present application also proposes a heater for an aerosol-generating device, comprising:

a susceptor which can be penetrated by a varying magnetic field to generate heat; the susceptor is configured as a tube extending along a length of the heater;

an electromagnetic induction coil for generating a varying magnetic field; the electromagnetic induction coil is arranged to surround at least a portion of the susceptor and is at least partially supported by the susceptor;

a coating at least partially surrounding and encasing the electromagnetic induction coil to secure or restrain or retain the electromagnetic induction coil outside of the susceptor.

The above aerosol-generating device, the induction coil and the susceptor being integrated in one heater component is advantageous for product miniaturization.

Drawings

One or more embodiments are illustrated by way of example in the accompanying drawings, which correspond to the figures in which like reference numerals refer to similar elements and which are not to scale unless otherwise specified.

Figure 1 is a schematic diagram of an aerosol-generating device provided by an embodiment;

FIG. 2 is a schematic cross-sectional view of the heater of FIG. 1;

FIG. 3 is a schematic view of an electromagnetic induction coil of yet another alternate embodiment;

FIG. 4 is a schematic view of a susceptor provided around a rod-shaped jig in the preparation of a heater;

FIG. 5 is a schematic illustration of the fixing of a first electrode and a second electrode outside a susceptor in the preparation of a heater;

FIG. 6 is a schematic illustration of an electromagnetic induction coil wound on the outside of a susceptor in the preparation of a heater;

FIG. 7 is a schematic illustration of the formation of a cladding layer in the preparation of a heater;

FIG. 8 is a schematic view of a heater of yet another alternate embodiment;

figure 9 shows a schematic view of an aerosol-generating device of yet another variant embodiment;

FIG. 10 is a schematic view of the heater of FIG. 9 from yet another perspective;

FIG. 11 is a schematic view of a heater in accordance with yet another alternate embodiment;

FIG. 12 is a temperature test result during heating for one embodiment of the heater of FIG. 11;

FIG. 13 is an enlarged view of portion A of FIG. 12;

FIG. 14 is a schematic view of a heater in accordance with yet another alternate embodiment;

FIG. 15 is a temperature test result during heating for one embodiment of the heater of FIG. 14;

FIG. 16 is an enlarged view of portion B of FIG. 15;

FIG. 17 shows a schematic view of a heater of yet another embodiment;

FIG. 18 is a graph showing inductance values as a function of frequency for an induction coil test using different lead materials in a heater of an embodiment;

FIG. 19 is a graph illustrating Q of an induction coil test using different wire materials in a heater according to one embodiment as a function of frequency;

FIG. 20 is a graph showing the variation of R value of high frequency impedance with frequency for an induction coil test using different wire materials in a heater according to one embodiment;

FIG. 21 shows a temperature rise comparison of induction coils using different wire materials in the heater of an embodiment;

FIG. 22 shows temperature rise contrast when induction coils of different wire materials are used to drive heating at different driving voltages and frequencies in a heater according to an embodiment;

fig. 23 shows a temperature rise comparison when the induction coils using different wire materials are driven to heat at different driving voltages and frequencies in the heater of the further embodiment.

Detailed Description

To facilitate an understanding of the present application, the present application is described in more detail below with reference to the following figures and detailed description.

One embodiment of the present application proposes an aerosol-generating device 100, such as that shown in figure 1, that heats, rather than burns, an aerosol-generating article 1000, such as a cigarette rod, thereby volatilizing or releasing at least one component of the aerosol-generating article 1000 to form an aerosol for inhalation.

Further in alternative implementations, the aerosol-generating article 1000 preferably employs a tobacco-containing material that releases volatile compounds from the substrate upon heating; or it may be a non-tobacco material that is suitable for electrically heated smoking after heating. The aerosol-generating article 1000 preferably employs a solid substrate, which may comprise one or more of a powder, granules, shredded strips, strips or flakes of one or more of vanilla leaf, tobacco leaf, homogenized tobacco, expanded tobacco; alternatively, the solid substrate may contain additional tobacco or non-tobacco volatile flavour compounds to be released upon heating of the substrate.

And as shown in figure 1, it is advantageous for the aerosol-generating article 1000 to be received by the aerosol-generating device 100 and then be exposed partially to the exterior of the aerosol-generating device 100, for example as a filter, for inhalation by the user.

The configuration of the aerosol-generating device according to an embodiment of the present application can be seen from fig. 1, the overall external shape of the device is substantially configured as a flat cylinder, and the external member of the aerosol-generating device 100 includes:

a housing 10 having a hollow structure therein to form an assembly space for necessary functional parts such as an electronic device and a heating device; housing 10 has a proximal end 110 and a distal end 120 opposite along its length; wherein, the first and the second end of the pipe are connected with each other,

the proximal end 110 is provided with an opening 111 through which the aerosol-generating article 1000 may be received within the housing 10 to be heated or removed from within the housing 10;

the distal end 120 is provided with an air intake hole 121; the air intake holes 121 are used to supply external air into the case 10 during suction.

As further shown in fig. 1, the aerosol-generating device 100 further comprises:

a chamber for receiving or receiving an aerosol-generating article 1000; in use, the aerosol-generating article 1000 may be removably received within the chamber through the opening 111.

And as shown in figure 1, the aerosol-generating device 100 further comprises:

an air channel 150 between the chamber and the air inlet 121; the air channel 150 thereby provides a passage path from the air inlet 121 into the chamber/aerosol-generating article 1000 in use, as indicated by arrow R11 in figure 1.

As further shown in fig. 1, the aerosol-generating device 100 further comprises:

a battery cell 130 for supplying power; preferably, the battery core 130 is a rechargeable dc battery core 130, and can be recharged by connecting with an external power supply;

a circuit board 140 on which a circuit is arranged.

As further shown in figure 1, the aerosol-generating device 100 further comprises:

a heater 30 at least partially surrounding and defining a chamber, the heater 30 at least partially surrounding or enclosing the aerosol-generating article 1000 and heating from the periphery of the aerosol-generating article 1000 when the aerosol-generating article 1000 is received within the housing 10. And is at least partially received and retained within the heater 30 when the aerosol-generating article 1000 is received within the housing 10.

In an implementation, the heater 30 is the heater 30 that converts the direct current output by the battery cell 130 through the circuit board 140 into an alternating current, and supplies the alternating current to the heater 30, so that the heater 30 generates an alternating magnetic field and thus generates heat by induction.

As further shown in fig. 2, the heater 30 is configured in a substantially elongated tubular shape and includes:

a tubular susceptor 31, the susceptor 31 being made of a sensitive metal or alloy and being penetrable by a varying magnetic field M to generate heat; the material of the susceptor 31 is preferably SUS430 stainless steel, permalloy, iron-aluminum alloy, silicon steel, or the like. And in some preferred implementations a soft magnetic susceptor having a curie temperature of no less than 350 c is used.

And in a more preferred implementation the inner and/or outer surface of the susceptor 31 may be treated by a surface treatment which on the one hand provides protection against surface corrosion or surface oxidation and on the other hand insulates the surface is advantageous for assembly. Surface treatment may include depositing or coating a nanoceramic coating, a silicone coating, an inorganic glue, a glass frit, alumina, etc. on the surface.

And a chamber for receiving and holding the aerosol-generating article 1000 is defined, in use, by the at least partial hollowing of the susceptor 31.

In some specific implementations, susceptor 31 has a wall thickness of about 0.05 to 1mm; and susceptor 31 has an inner diameter of about 5.0 to 8.0 mm; and susceptor 31 has a length of about 30-60 mm.

As further shown in fig. 2, the heater 30 further includes:

an electromagnetic induction coil 32 configured as a spiral coil surrounding the susceptor 31; the electromagnetic coil 32 is configured to provide an alternating current from the circuit board 140 to generate a varying magnetic field M through the susceptor 31 to induce the susceptor 31 to generate heat. The material of the electromagnetic induction coil 32 is made of a material of a good conductor metal with a relatively low resistivity, such as gold, silver, copper, or an alloy containing them. Of course, in a more preferred embodiment, the surface of the electromagnetic coil 32 is insulated by spraying an insulating layer or an enamel wire.

In a more preferred implementation, the frequency of the alternating current supplied by circuit board 140 to electromagnetic induction coil 32 is between 80KHz and 800KHz; more specifically, the frequency may be in the range of approximately 200KHz to 500KHz. In one of the most common implementations, the circuit board 140 typically includes a capacitor, and forms an LC resonant circuit with the electromagnetic coil 32 via the capacitor; and, the circuit board 140 forms an alternating current flowing through the electromagnetic induction coil 32 by driving the LC resonance circuit to oscillate at the above predetermined frequency.

In a preferred embodiment, the battery cell 130 provides a dc supply voltage in a range from about 2.5V to about 9.0V, and the battery cell 130 provides a dc current with an amperage in a range from about 2.5A to about 20A.

And, in this implementation, to facilitate the improvement of the quality factor Q after accessing the circuit board 140.

Generally, for an LC resonant circuit, the Q value represents the ratio of the energy stored to the energy consumed during a cycle; in a typical implementation, the smaller the higher Q-factor loss, the higher the efficiency, which is beneficial for improving the oscillation efficiency and frequency selectivity range in the circuit operation. And in particular to the quality factor Q of the electromagnetic coil 32 in the resonant circuit, can be characterized as the ratio of the inductive reactance exhibited by the electromagnetic coil 32 when the electromagnetic coil 32 is operated at an ac voltage of a certain frequency to the high frequency impedance of the coil. The quality factor Q of the electromagnetic induction coil 32 is generally calculated according to the physical formula Q = ω L/R; in the calculation formula, ω is the operating frequency, L is the inductance value of the electromagnetic coil 32, and R is the high-frequency impedance of the electromagnetic coil 32.

Then, further according to the above calculation formula, the improvement of the quality factor Q can be generally performed by increasing the inductance L and decreasing the resistance R. And in a more preferred implementation, the wire material of the electromagnetic coil 32 includes silver, which is advantageous for reducing the resistance R and increasing the quality factor Q. And in a more preferred implementation, the electromagnetic coil 32 has approximately 5-60 turns. And preferably the electromagnetic induction coil 32 has a length of about 250-800 mm. And the electromagnetic coil 32 includes 0.2 to 0.8 windings or turns per unit centimeter in the axial direction.

And in the above implementation, the electromagnetic coil 32 is wound directly outside the susceptor 31 and is at least partially supported by the susceptor 31.

To facilitate modular mass production of the heater 30, and connection to the circuit board 140; as further shown in fig. 2, the heater 30 further comprises:

the susceptor 31 has a first end 310 and a second end 320 facing away in the longitudinal direction;

a first electrode 33, such as an electrode ring or electrode sheath or electrode cap or printed electrode coating or the like; the first electrode 33 is arranged at the first end 310 of the susceptor 31 and is bonded to the susceptor 31 around and by fastening;

a second electrode 34, such as an electrode ring or electrode sheath or electrode cap or printed electrode coating or the like; the second electrode 34 is arranged at the second end 320 of the susceptor 31 and surrounds and is joined by fastening to the susceptor 31;

the end of the electromagnetic induction coil 32 close to the first end 310 along the axial direction is connected with the first electrode 33 by crimping or welding, etc. to form electric conduction, and the end of the electromagnetic induction coil 32 close to the second end 320 along the axial direction is connected with the second electrode 34 by crimping or welding, etc. to form electric conduction;

then, the first electrode 33 and the second electrode 34 are connected to the circuit board 140 by a first conductive lead and a second conductive lead (not shown), respectively, to conduct a current between the circuit board 140 and the electromagnetic induction coil 32. The first conductive lead and the second conductive lead can adopt common metal wires such as copper wires, nickel wires and the like. In the connection, the first electrode 33 is connected to the circuit board 140 through a first conductive lead, and the second electrode 34 is connected to the circuit board 140 through a second conductive lead.

Or in yet another alternative implementation, since susceptor 31 is a conductor of conductive metals and alloys. In practice, the first end of the electromagnetic coil 32 is directly welded to the outer surface of the susceptor 31, and the second end is welded to the electrode; the first conductive lead is indirectly conducted with the first end of the electromagnetic induction coil 32 by being welded to the susceptor 31; the second conductive lead is welded to the electrode, and is indirectly conducted with the second end of the electromagnetic induction coil 32.

In some implementations, the electromagnetic coil 32 is uniformly wound outside the susceptor 31. And the spacing between adjacent windings or turns of the electromagnetic coil 32 is constant or uniform in the axial direction. Or in yet other variations, the spacing between adjacent windings or turns of the electromagnetic coil 32 varies in the axial direction. And, in a more preferred implementation, the number of turns or windings per unit length of the middle portion of the electromagnetic coil 32 is less than the number of turns or windings per unit length of at least one of the two end portions. I.e. the windings of the middle portion of the electromagnetic coil 32 are relatively more sparse and the windings of at least one of the two end portions are relatively more dense.

As further shown in fig. 2, the heater 30 further includes:

a cladding layer 35 surrounding the first electrode 33, the second electrode 34, and the electromagnetic induction coil 32; and, the cladding layer 35 can also cover and surround the exposed portion of the surface of the susceptor 31 exposed to the electromagnetic induction coil 32. The cladding 35 defines the outer surface of the heater 30.

And the cladding 35 also serves to fasten or restrain or hold the electromagnetic induction coil 32 to the outside of the susceptor 31.

And in some implementations, the cladding 35 is thermally and/or electrically insulating; thereby providing thermal and electrical insulation of the outer surface of the heater 30.

In some embodiments, the coating layer 35 is obtained by forming thermal insulation and/or electrical insulation by spraying or depositing, etc. on the outside of the susceptor 31 and the electromagnetic induction coil 32, and curing the same.

In some implementations, the cladding layer 35 includes glass, glaze, ceramic, silicone, organic polymer resins such as epoxy, and the like; the coating layer 35 is, for example, an organic silicon coating layer, has a structure that the main chain of the polymer is Si-O-Si, and has double performances of organic matters and inorganic matters, thereby generating excellent heat resistance, flame retardance, insulation, and good water resistance, moisture resistance and weather resistance; for example, some typical silicone coating materials include polymers of one or more of siloxane, methyl vinyl silicone rubber, raw rubber, hydroxyl terminated polydimethylsiloxane oligomers, aminosilane, mercaptosilane, and the like. In the preparation, the material forming the coating layer 35 is sprayed or deposited on the outside of the susceptor 31 and the electromagnetic induction coil 32, and then cured under suitable conditions such as vacuum or heating. And, in the heater 30 having the above clad 35, the electromagnetic induction coil 32 and the susceptor 31 are not detachable or movable or separable from each other.

And the heater 30 in which the electromagnetic induction coil 32 and the susceptor 31 are coated and fixed by spraying or depositing the coating layer 35 are advantageous for miniaturization and integration. In some preferred implementations, as shown in FIG. 2, the maximum distance d1 from the inner surface to the outer surface of the integrated heater 30 in the radial direction is less than 3mm; more preferably, the maximum distance d1 from the inner surface to the outer surface of the heater 30 in the radial direction is less than 1mm.

In still other implementations, to ensure a smooth, flat and aesthetically pleasing outer surface of the heater 30 defined by the cladding 35, the cladding 35 may be a high temperature resistant material such as glass enamel, cast sheet, etc. directly coated or wound on the coil surface, or may also be a thin wall tube of ceramic or the like that is sleeved over the electromagnetic induction coil 32.

Or in yet other implementations, the electromagnetic coil 32 may be surrounded by a cladding layer 35 and filled with a layer of thermally insulating material therebetween; or a material layer with low thermal conductivity coefficient, such as aerogel, or a porous material, such as porous glass, porous ceramic, porous polyester resin, polyurethane foam, etc., is additionally arranged between the electromagnetic induction coil 32/susceptor 31 and the coating layer 35 to reduce the outward diffusion of heat.

Or in yet other implementations, the heater 30 further includes a magnetic shielding layer bonded to the outer surface of the cladding 35 for providing magnetic shielding outside the electromagnetic coil 32 and/or the cladding 35. In some implementations, the magnetic shielding layer is formed by a thin film layer, such as a ferrite film layer, a magnetic metal or their oxides, wound or wrapped around the cladding layer 35; or in still other implementations, the magnetic shielding layer is a coating or thin layer formed directly on or bonded to the outer surface of the cladding layer 35 by ferrite, an oxide of a magnetic metal, or the like, by deposition or spraying.

In some implementations, the electromagnetic coil 32 is wound of a conventional wire material that is circular in cross-section. Or in yet other variations, such as shown in fig. 3, the cross-sectional shape of the wire material of the electromagnetic coil 32a is a wide or flat shape other than a conventional circular shape. In the preferred embodiment shown in fig. 3, the cross-section of the wire material of the electromagnetic induction coil 32a has a dimension extending in the longitudinal direction larger than a dimension extending in a radial direction perpendicular to the longitudinal direction, so that the cross-section of the wire material of the electromagnetic induction coil 32a has a flat rectangular shape.

In brief, the electromagnetic induction coil 32a of the above configuration is completely or at least flattened in the form of the wire material, as compared with a conventional helical heating coil formed of a circular-section wire. Thus, the wire material extends to a lesser extent in the radial direction. By this measure, the contact area with the susceptor 31 can be raised to increase the heat conduction, reducing the energy loss in the electromagnetic induction coil 32 a. In particular, the transfer of the heat generated by the electromagnetic induction coil 32a in a radial direction towards the susceptor 31 may be facilitated.

And in some preferred implementations the wire material of the electromagnetic coil 32/32a is made of litz wire or is a litz cable. In litz material the wires or cables are made of a plurality or bundles of electrically conductive wires, for example individual isolated wires bundled in a twisted or braided manner. Litz materials are particularly suitable for carrying alternating current. The separate wire is designed to reduce surface effects and near field effects losses in the conductor at high frequencies and to allow the interior of the wire material of the electromagnetic induction coil 32/32a to contribute to the conductivity of the electromagnetic induction coil 32/32 a.

In some embodiments, two different thermocouple wires are used for the first and second leads, respectively, to form a thermocouple for temperature measurement therebetween, so as to obtain the temperature of the heater 30. Or in yet other implementations, the temperature of the heater 30 is monitored by adding a temperature sensor, such as PT1000, in contact with the electromagnetic coil 32/32 a.

And in some implementations these temperature sensors, such as PT1000, or thermocouples, are affixed to the susceptor 31 to sense the temperature of the susceptor 31. And the temperature sensor is coupled to the region of highest temperature of the susceptor 31; for example, the distance between the temperature sensor and the upper end of the susceptor 31 and the joint position of the susceptor 31 is 1/3-2/3 of the length size of the susceptor 31; this zone location is essentially the zone location where the susceptor temperature is the highest, which is advantageous for accurate temperature measurement.

Or in yet another specific implementation, the heater 30 further comprises:

a first thermocouple wire and a second thermocouple wire; the first thermocouple wire is connected with the first end of the electromagnetic induction coil 32 by welding and the like, and the second thermocouple wire is connected with the second end of the electromagnetic induction coil 32 by welding and the like; and the first thermocouple wire and the second thermocouple wire are made of different thermocouple materials, so that a thermocouple for sensing temperature can be formed between the first thermocouple wire and the second thermocouple wire. The surfaces of the first thermocouple wire and the second thermocouple wire are plated with silver or gold or copper, so that the resistance of the first thermocouple wire and the second thermocouple wire is reduced, and the influence on the Q value is reduced.

In yet another variant, the susceptor 31 is prepared by selecting a susceptor material of suitable curie temperature; for example, the material used for the susceptor 31 has a curie temperature of 280 degrees, 300 degrees, 350 degrees, or the like; when the circuit board 140 detects that the magnetism of the susceptor 31 reaches the curie point temperature, the ferromagnetism is mutated into paramagnetism, so that the hysteresis loss is no longer generated and the circuit board generates heat, and the oscillating voltage or current at the two ends of the electromagnetic induction coil 32 in the circuit correspondingly generates mutation along with the magnetic mutation of the susceptor 31; the circuit board 140 can obtain the temperature by monitoring this sudden change.

The heater 30 having the above configuration is very convenient in the modular preparation of lots by a winding apparatus, which may be seen in fig. 4 to 7, including:

s10, as shown in FIG. 4, a bar-shaped jig 200 is obtained, and the tubular susceptor 31 is sleeved outside the jig 200;

s20, as shown in fig. 5, fixing the first electrode 33 and the second electrode 34, for example, the electrode ring, to the two ends of the susceptor 31 by crimping, etc.; in a more preferred manufacturing process, it is also possible to spray or brush a layer of interface adhesive on the surface of the two end portions of the susceptor 31 before the first electrode 33 and the second electrode 34 are sleeved on the susceptor, which is advantageous for promoting the bonding between the contact interface of the first electrode 33 and the susceptor 31 and the bonding between the contact interface of the second electrode 34 and the susceptor 31.

S30, as shown in fig. 6, winding a conducting wire material outside the susceptor 31 by a winding device to form an electromagnetic induction coil 32, and respectively welding two ends of the electromagnetic induction coil 32 to the first electrode 33 and the second electrode 34 to form conduction; it is further possible to solder a first conductive lead to the first electrode 33 and a second conductive lead to the second electrode 34, which is advantageous for connecting the circuit board 140 to the first conductive lead and the second conductive lead after production.

After the electromagnetic induction coil 32 is formed, the module shown in fig. 6 can be further wrapped by a silica gel sleeve, vacuumized and subjected to isostatic pressing treatment, so that the electromagnetic induction coil 32 is fully contacted with the susceptor 31, and the consistency and yield of products prepared in batches are improved.

S40, as shown in fig. 7, further spraying or depositing a coating layer 30, such as a glass glaze layer, on the surface, and then curing; then, the rod-shaped jig 200 is removed from the mold, thereby obtaining the heater 30.

Or further fig. 8 shows a schematic view of a further alternative embodiment of a heater 30b, the heater 30b further comprising a tubular outer support element 36b nested or surrounding the cladding 35; the outer support element 36b, such as a rigid metal tube, a tube of wound fiber cloth, etc., compensates for the lack of strength, thereby slowing the strength requirements of the susceptor 31, allowing the susceptor 31 to be made thinner, e.g., less than 0.1mm, and improving the heat transfer efficiency of the susceptor 31 between the electromagnetic coil 32/32a and the aerosol-generating article 1000.

Alternatively, in yet another implementation, the present application contemplates a heater 30 of yet another alternate implementation, as shown in FIG. 2, comprising:

a heat conductive substrate 31, in this embodiment, the heat conductive substrate 31 is made of a material that is non-sensitive and has good heat conductivity; such as alumina ceramics, magnesia ceramics, heat conductive glass, etc., which have relatively high thermal conductivity coefficients; the thermally conductive substrate 31 is tubular in shape;

the electromagnetic induction coil 32 itself is made of a sensitive metal or alloy, such as SUS430 stainless steel, permalloy, ferronickel, iron-aluminum alloy, silicon steel, iron, or the like; the electromagnetic induction coil 32 surrounds and is bonded to the outer side surface of the substrate 31; similarly, the two ends of the electromagnetic coil 32 are respectively connected to the circuit board 140 by disposing electrodes and further soldering leads on the electrodes;

a cladding layer 33, a high temperature resistant material deposited or coated or wound on the coil surface, such as glass glaze, ceramic tape, etc., to encapsulate or confine the electromagnetic induction coil 32 to the outer surface of the substrate 31;

a circuit board 140 for supplying an alternating current, for example, an alternating current of 80KHz to 800KHz, to the electromagnetic induction coil 32, thereby causing the electromagnetic induction coil 32 to generate heat while generating the magnetic field M; the substrate 31 heats the aerosol-generating article 1000 by receiving or transferring heat from the electromagnetic coil 32.

An embodiment of the present application provides an aerosol-generating device, the configuration of which can be seen in fig. 9 to 10, comprising:

a chamber for at least partially receiving and receiving an aerosol-generating article 1000;

a heater 30c, at least a portion of which extends within the receiving chamber and generates heat when penetrated by a varying magnetic field, thereby heating the aerosol-generating article 1000, such as a tobacco rod, to volatilize at least one component of the aerosol-generating article 1000 to form an aerosol for smoking;

a magnetic field generator, such as an induction coil 32c, for generating a varying magnetic field under an alternating current;

the battery cell 130c is a rechargeable direct current battery cell and can output direct current;

the circuit 140c is electrically connected to the rechargeable battery cell 130c through a suitable electrical connection, and is used for converting the direct current output by the battery cell 130c into an alternating current with a suitable frequency and supplying the alternating current to the induction coil 32c, so that the induction coil 32c generates a changing magnetic field.

In a preferred embodiment, the heater 30c is generally in the shape of a pin or needle, which in turn is advantageous for insertion into the aerosol-generating article 1000. Meanwhile, the heater 30c may have a length of about 12 to 19mm and an outer diameter of 2.0 to 2.6 mm.

As further shown in fig. 10, the post-assembly heater 30c is configured as a pin or needle or post or rod that extends at least partially within the receiving cavity; the heater 30c includes:

a housing 31c configured in a pin or needle or column or rod shape; and opposite ends of the housing 31c in the lengthwise direction define a free front end 311c and a distal end 312c, respectively, forming the heater 30 c; and, the housing 31c has a cavity 313c therein extending between the free front end 311c and the end 312 c. Wherein the cavity 313c is open or open at the end 312c to facilitate the assembly of the various functional components therein.

In some implementations, the housing 31c has an outer diameter of about 2.0-2.6 mm, and a wall thickness of about 0.1-0.3 mm; the inner diameter of the cavity 313c of the housing 31c is about 1.5 to 2.3mm and the length of the cavity 313c is about 12 to 16mm. In the embodiment, the housing 31c is made of a heat conductive material and is insulating; including, for example, ceramics, glass, surface insulated metals such as surface oxidized stainless steel, and the like. And, when the housing 31c comprises a metal or alloy, it is preferred that the housing 31 be substantially non-susceptible, or less susceptible, such as grade 304 stainless steel, rather than a more susceptible grade 430/420 stainless steel. The case 31c itself is substantially non-heat-generating.

An induction coil 32c, which is a normal solenoid coil, for generating a changing magnetic field; a first electrically conductive lead 321c and a second electrically conductive lead 322c are connected to the ends of the induction coil 32c, respectively, in use, the first and second electrically conductive leads 321c and 322c being connected to the circuit 140c in use.

The sensitive magnetic core 33c is made of a soft magnetic material preferably such as SUS430 stainless steel, permalloy, iron-aluminum alloy, silicon steel, or the like. Configuration of the magnetic core 33c in the embodiment shown in fig. 10, it is configured in a hollow tubular shape. Or in yet other variations, the core 33c may be a solid rod or bar, etc. According to the embodiment shown in fig. 10, the first conductive lead 321c is at least partially disposed within the central bore of the tubular core 33c and extends from within the central bore of the tubular core 33c to outside the end 312c of the heater 30 c.

After assembly, the magnetic core 33c is positioned in the induction coil 32c and forms a heating module together with the induction coil 32 c; the induction coil 32c generates a changing magnetic field, and the magnetic core 33c is penetrated by the changing magnetic field to generate heat; the housing 31c heats the aerosol-generating article 1000 by receiving or transferring heat from the heat-generating module, which in turn heats the aerosol-generating article.

In the preferred implementation, the induction coil 32c has about 6 to 18 turns and a length of about 8 to 15 mm. And the outer diameter of the induction coil 32c is not more than 1.9mm at maximum, preferably 1.6 to 1.9mm. And, the material of the induction coil 32c is preferably a good conductor material having a relatively low resistivity and a temperature resistance higher than 500 ℃, such as gold, silver, copper, aluminum, nickel, iron, permalloy, iron-aluminum alloy, and the like. And, the tubular magnetic core 33c has an extension length of about 10 to 19 mm; and the tubular magnetic core 33c has an inner diameter of about 0.3 to 0.8mm and an outer diameter of 1.0 to 1.6 mm. And the number of the first and second groups,

and in a more preferred implementation, the heater 30c further comprises:

the temperature sensor 40c, for example, a thermocouple, PT1000, or the like, is coupled to a high temperature region of the core 33c, so that the temperature of the heater 30c can be detected with higher accuracy. Specifically, the high temperature region of the core 33c is located at a distance d2 from the upper end of the core 33c (the end near the free front end 311 c) of between 1/3 and 2/3 of the length of the core 33c, and the temperature sensor 40c is coupled to the region to measure the temperature; more preferably, the distance d2 of the temperature sensor 40c from the upper end of the magnetic core 33c is between 1/3 and 1/2 of the length of the magnetic core 33c, which is more accurate for temperature measurement. In one specific implementation, the distance d2 of the temperature sensor 40c from the upper end of the magnetic core 33c is 8 to 9mm. Temperature sensor 40c is connected to circuit 140c by lead 411c for

In the implementation shown in fig. 10, the temperature sensor 40c is bonded to the inner surface of the core 33 c; or in yet other variations, temperature sensor 40c is bonded to the outer surface of core 33 c. When the temperature sensor 40c is a thermocouple and is welded to the inner surface of the magnetic core 33c, the wall of the magnetic core 33c may be perforated at the welded portion, and it is advantageous to perform positioning and welding assistance through the perforation.

Or FIG. 11 shows a schematic view of a heater 30c of yet another alternative embodiment employing a chip-like magnetic core 33 d; a first thermocouple wire 41d and a second thermocouple wire 42d are welded to the respective side surfaces of the sheet-shaped magnetic core 33d in the thickness direction; and, the first thermocouple wire 41d and the second thermocouple wire 42d are made of two different materials, and a thermocouple for monitoring the temperature of the heater 30c is formed therebetween.

And the distance d2 between the connection position of the first thermocouple wire 41d and/or the second thermocouple wire 42d and the magnetic core 33d and the upper end of the magnetic core 33d is 8-9 mm; and a distance d2 between a connection position of the first thermocouple wire 41d and/or the second thermocouple wire 42d and the magnetic core 33d and an upper end of the magnetic core 33d is between 1/3 and 2/3 of a length of the magnetic core 33 c.

Fig. 12 and 13 respectively show a heating process of the thermocouple sampling feedback heater 30c formed with the first thermocouple wire 41d and/or the second thermocouple wire 42d during the heating process with the heater 30c of fig. 11, and a temperature fluctuation curve of the position of the case 31c corresponding to the thermocouple connection site is monitored with an infrared camera; wherein the target temperature set by the software during the heating process is constantly 346 ℃. From the fluctuating curve result, the difference between the temperature precision control of the temperature point to be measured and controlled and the target temperature is basically within +/-2 ℃, and the measurement and control are relatively accurate.

Further FIG. 14 shows a schematic view of a heater 30e of yet another alternative embodiment; in this embodiment, the heater 30e includes:

a non-sensitive outer shell 31e made of, for example, a highly thermally conductive ceramic such as alumina ceramic, aluminum nitride ceramic, or highly thermally conductive glass; the housing 31e is pin-shaped and has an inner cavity;

an induction coil 32e made of sensitive material and positioned in the shell 31 e; the induction coil 32e is supplied with an alternating current from the circuit 140c, causing the induction coil 32e to excite itself to generate heat.

And a heater 30e, wherein a thermocouple is formed by a first thermocouple wire 41e welded to the upper end of the induction coil 32e and a second thermocouple wire 42e welded to the lower end of the induction coil 32e to monitor the temperature of the heater 30 e.

The upper end of the induction coil 32e is also connected to a first power supply lead 321e, and the lower end of the induction coil 32e is also connected to a second power supply lead 322e. In this embodiment, the first and second current-feeding leads 321e and 322e are made of a metal or alloy having a resistivity different from that of the first and second thermocouple wires 41e and 42 e.

Fig. 15 and 16 respectively show a heating process of the thermocouple sampling feedback heater 30e formed with the first thermocouple wire 41e and/or the second thermocouple wire 42e in the heating process with the heater 30e of fig. 14, and a temperature fluctuation curve of a longitudinal middle position of the housing 31e corresponding to a thermocouple connection portion is monitored with an infrared camera; wherein the target temperature set by the software in the heating process is constantly 350 ℃. From the curve result of fluctuation, the difference between the temperature precision control of the temperature point to be measured and controlled and the target temperature is basically within +/-1.5 ℃, and the measurement and control are relatively accurate.

Or further figure 17 shows a schematic view of a heater 30f of yet another alternative embodiment; the heater 30f includes:

the non-sensitive outer case 31f may be, for example, an insulating ceramic material, a quartz glass case, a cast sheet, or the like, or the outer case 31f may be non-sensitive or non-sensitive metal case including stainless steel 304, SUS430, iron chromium aluminum, or the like, so that the outer case 31f is not sensible to heat; the housing 31f is pin-shaped having a free front end 311f, a distal end 312f, and an interior cavity extending between the free front end 311f and the distal end 312f;

an induction coil 32f made of sensitive material is positioned in the shell 31 f; the induction coil 32f is supplied with an alternating current from the circuit 140c, and the induction coil 32f itself is excited to generate heat. The non-receptive outer shell 31f heats the aerosol-generating article 1000 by transferring or conducting heat from the induction coil 32 f. The gap between the induction coil 32f and the housing 31f may be filled by applying a glass paste, a ceramic paste, an epoxy resin paste, or the like, or by filling a glass frit.

The housing 31f is provided with a first notch or slot 311f extending in the longitudinal direction near the end 312f, and a second notch or slot 312f; the first thermocouple wire 41f is welded to the housing 31f in the first notch or groove 311f, and the second thermocouple wire 42f is welded to the housing 31f in the second notch or groove 312f; the first thermocouple wire 41f and the second thermocouple wire 42f are used to form a thermocouple that senses the temperature of the heater 30 f. And, in a preferred embodiment, the width of first notch or slot 311 f/second notch or slot 312f should be at least 2 times greater than the diameter of first thermocouple wire 41 f/second thermocouple wire 42f, etc., to ensure that the thermocouple wires can be placed within them. The first indentation or slot 311 f/second indentation or slot 312f may extend about 3 to 6mm in length.

The surfaces of the first thermocouple wire 41f and the second thermocouple wire 42f are plated with silver or gold or copper, so that the resistance of the first thermocouple wire 41f and the second thermocouple wire 42f is reduced, and the influence on the Q value is reduced.

Fig. 18 to 20 show the results of the inductance L, the quality factor Q, and the on-high frequency resistance R of the induction coil 32f using different sizes of wire materials in the heater 30f measured by an automatic LCR tester of japanese national model (HIOKI) IM3536, respectively. In the specific test implementation, the material of the induction coil 32f is SUS430 stainless iron with sensitivity, the number of turns is 12, the length of the induction coil 32f is 10.5 ± 0.5mm, and the outer diameter is 1.6mm; the outer shell 31f is a metal shell of 304 stainless steel with very low susceptibility. And the dimension of the wire material of the induction coil 32f in the axial direction corresponding to the curve S1a in fig. 18, the curve S1b in fig. 19, and the curve S1c in fig. 20 is 0.8mm, and the dimension in the radial direction is 0.1mm; the wire material of the induction coil 32f corresponding to the curve S2a in fig. 18, the curve S2b in fig. 19, and the curve S2c in fig. 20 has a dimension of 0.8mm in the axial direction and a dimension of 0.2mm in the radial direction. From the comparative test results of fig. 18 to 20, the radial size of the SUS430 coil was increased from 0.1mm to 0.2mm for the same outer diameter, number of turns, and line width, and the L-average value of the inductance was increased from-0.15 muh to 0.18 muh, the ac resistance was decreased from 0.4 to 0.5 omega to-0.3 omega, and the Q value was increased from about 0.8 to 1.2 or more in the frequency band of 200kHz to 800 kHz. Theoretical evaluation shows that the heating element with the thickness of 0.2mm has a faster heating rate under the condition of the same input power; that is, the heater 30f has a greater heat generating efficiency when the wire material of the induction coil 32f is larger in the radial direction.

FIG. 21 is a graph showing a temperature rise comparison of a heater 30f for an induction coil 32f of different gauge wire material in one particular embodiment; in the test of the embodiment in fig. 21, the operating frequency of the driving heater 30f for driving the series LC oscillation of the induction coil 32f and the circuit 140c is 200 to 400kHz, and the voltage output by the battery cell 130c is 4.5V; and the heating temperature is set as 20s of preheating time and 290 ℃ of preheating temperature, and then the temperature is kept for 180s and 270 ℃. In fig. 21, the first thermocouple wire 41 f/the second thermocouple wire 42f of the heater 30f corresponding to the curve S1d is welded to the end 312f of the housing 31f, and the curve S1d uses a wire material of the induction coil 32f having a dimension of 0.8mm in the axial direction and a dimension of 0.1mm in the radial direction; the first thermocouple wire 41 f/second thermocouple wire 42f of the heater 30f corresponding to curve S2d in fig. 21 is welded to the first notch or groove 311 f/second notch or groove 312f at a position 3mm from the distal end 312f, and the wire material of the induction coil 32f corresponding to curve S2d has a dimension of 0.8mm in the axial direction and a dimension of 0.2mm in the radial direction. As can be seen from the test results of fig. 21, the resonant frequency of the induction coil 32f with the radial dimension of 0.1mm is the fastest in temperature rise around 300kHz, and the temperature rise of the induction coil 32f with the radial dimension of 0.2mm is the fastest around 250 kHz. And the first thermocouple wire 41 f/second thermocouple wire 42f of the curve S1d is welded to the end 312f of the case 31f, and the difference in sampling temperature is about 100 ℃ compared to the welding position of the curve S2d due to the deviation from the high temperature region.

And further fig. 22 shows the temperature rise results when the voltage output from the electric core 130c is boosted to different voltages and then heated by driving at different frequencies using the heater 30f in which the dimension of the wire material of the induction coil 32f in the axial direction is 0.8mm and the dimension in the radial direction is 0.1mm in one embodiment. In fig. 22, the driving frequency used in the curve S11e is 380kHz and the driving voltage is 5V, the driving frequency used in the curve S12e is 380kHz and the driving voltage is 6V, the driving frequency used in the curve S13e is 340kHz and the driving voltage is 6V, and the driving frequency used in the curve S14e is 300kHz and the driving voltage is 6V.

And further figure 23 shows the temperature rise results when the voltage output from the cell 130c is boosted to different voltages and then heated under driving at different frequencies using a heater 30f having a wire material of the induction coil 32f with a dimension of 0.8mm in the axial direction and a dimension of 0.2mm in the radial direction in one embodiment. In fig. 23, the driving frequency and the driving voltage used for the curve S21e are 250kHz and 5.5V, the driving frequency and the driving voltage used for the curve S22e are 250kHz and 4.5V, the driving frequency and the driving voltage used for the curve S23e are 200kHz and 4.5V, the driving frequency and the driving voltage used for the curve S24e are 250kHz and 4.5V, the driving frequency and the driving voltage used for the curve S25e are 280kHz and 4.5V, and the driving frequency and the driving voltage used for the curve S26e are 300kHz and 4.5V.

As can be seen from the test results of fig. 22 and 23, the heater 30f having a wire material of the induction coil 32f with a dimension of 0.2mm in the direction has a considerable temperature rise characteristic when driven at 250kHz and a voltage of only 4.5V. The heater 30f having a wire material dimension of 0.1mm in the direction thereof needs to be driven at 300kHz and at a voltage of 6V to have a sufficient temperature rise characteristic.

And also the power consumption of the heater 30f in the unloaded condition was simply evaluated, and the results showed that the power consumption of the heater 30f of which the wire material had a dimension in the direction of 0.2mm was 180mWh, and the power consumption of the heater 30f of which the wire material had a dimension in the direction of 0.1mm was 235mWh; the wire material has better performance when the dimension along the direction is 0.2mm.

It should be noted that the description and drawings of the present application illustrate preferred embodiments of the present application, but are not limited to the embodiments described in the present application, and further, those skilled in the art can make modifications or changes according to the above description, and all such modifications and changes should fall within the scope of the claims appended to the present application.

Claims (12)

1. An aerosol-generating device configured to heat an aerosol-generating article to generate an aerosol; it is characterized by comprising:

a chamber for receiving an aerosol-generating article;

a heater for heating an aerosol-generating article; the heater includes:

a susceptor comprising a susceptor metal or alloy and capable of being penetrated by a varying magnetic field to generate heat; the susceptor is configured to extend along a length of the heater and at least partially surround the chamber;

an electromagnetic induction coil for generating a varying magnetic field; the electromagnetic induction coil is arranged to surround at least a portion of the susceptor and is at least partially supported by the susceptor;

a coating at least partially surrounding and encasing the electromagnetic induction coil to secure or restrain or retain the electromagnetic induction coil outside of the susceptor; and

a circuit for providing an alternating current to the electromagnetic coil to cause the electromagnetic coil to generate a changing magnetic field.

2. An aerosol-generating device according to claim 1, wherein the electromagnetic coil is non-detachable or inseparable from the susceptor.

3. An aerosol-generating device according to claim 1 or 2, wherein the heater comprises an inner surface and an outer surface facing away from each other in a radial direction;

the maximum distance between the inner and outer surfaces is less than 3mm.

4. Aerosol-generating device according to claim 1 or 2, wherein the electromagnetic coil comprises 0.2 to 0.8 windings or turns per unit of cm in the axial direction.

5. An aerosol-generating device according to claim 1 or 2, wherein the heater further comprises:

an insulating layer located between the cladding layer and the susceptor to provide thermal insulation therebetween.

6. An aerosol-generating device according to claim 5, wherein the insulating layer comprises an aerogel or porous body material.

7. Aerosol-generating device according to claim 1 or 2, wherein the cross section of the wire material of the electromagnetic induction coil is configured to extend a greater length in an axial direction than in a radial direction of the electromagnetic induction coil.

8. An aerosol-generating device according to claim 1 or 2, wherein the heater has first and second ends facing away from each other along the length; the heater further comprises:

a first electrode and a second electrode for guiding a current on a power supply path of the electromagnetic induction coil; wherein, the first and the second end of the pipe are connected with each other,

the first electrode is proximate the first end and at least partially surrounds the susceptor;

the second electrode is proximate the second end and at least partially surrounds the susceptor.

9. An aerosol-generating device according to claim 1 or 2, wherein the heater further comprises: an outer support element at least partially surrounding or enveloping the coating.

10. An aerosol-generating device according to claim 1 or 2 in which the alternating current has a frequency of between 200KHz and 500KHz.

11. An aerosol-generating device configured to heat an aerosol-generating article to generate an aerosol; it is characterized by comprising:

a chamber for receiving an aerosol-generating article;

a heater for heating the aerosol-generating article; the heater includes:

a non-susceptor substrate configured to extend along a length of the heater and at least partially surround the chamber;

an electromagnetic induction coil comprising a susceptible metal or alloy; the electromagnetic induction coil is arranged to surround and bond to at least a portion of an outer surface of the substrate; the electromagnetic coil and the substrate are thermally conductive to each other;

circuitry for providing an alternating current to the electromagnetic induction coil to excite the electromagnetic induction coil to generate heat which in turn transfers heat to an aerosol-generating article through the substrate to heat the aerosol-generating article.

12. A heater for an aerosol-generating device, comprising:

a susceptor which can be penetrated by a varying magnetic field to generate heat; the susceptor is configured as a tube extending along a length of the heater;

an electromagnetic induction coil for generating a varying magnetic field; the electromagnetic induction coil is arranged to surround at least a portion of the susceptor and is at least partially supported by the susceptor;

a coating at least partially surrounding and encasing the electromagnetic induction coil to secure or restrain or retain the electromagnetic induction coil outside of the susceptor.

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