CN217523938U - Electromagnetic induction heating base body and system and device thereof - Google Patents

Abstract

The utility model discloses an electromagnetic induction heating base member and system and device thereof for the electromagnetic induction heating of aerosol generating device, including first slice induction heating body and second slice induction heating body, both integrated into one piece, be circumference distribution and connect in the central part jointly, first slice induction heating body includes reverse extension portion, and second slice induction heating body is being close to central part department has the wire casing of cutting apart, cuts apart the wire casing and is close to central part department not closed at first slice induction heating body, cuts apart the profile that the wire casing becomes reverse extension portion, and when first slice induction heating body was turned over for the central part and is rolled over, reverse extension portion was turned over for the central part and turns over the book.

Description

Electromagnetic induction heating base body and system and device thereof

Technical Field

The utility model relates to a novel tobacco field, in particular to electromagnetic induction heating base member and system thereof.

Background

Heated cigarettes are a type of new tobacco product and are an option for consumers to reduce the harm that traditional tobacco presents. Conventional tobacco rods are typically cigarettes in a random tobacco array. In the development of new tobacco, one development direction was to make improvements in Heatable (Heatable) directly on the traditional tobacco rod in order to maximize the retention of the flavor of the traditional tobacco. However, the technical problem is that the disordered cigarettes are difficult to insert compared with the existing internal heating smoking set, and the external heating smoking set has the problem of insufficient heating.

The existing cigarette heating appliance mainly utilizes the principle of resistance heating, and the heating modes mainly comprise inner core heating, peripheral heating and internal and external mixed heating. The smoking set of inner core heating, owing to make cigarette be convenient for insert, generally use the heating member of pin type, the cross sectional area of its heating member needs lessly for cigarette is at the in-process of heating, and the cigarette medium that is close to the heating member is overheated, and the cigarette medium of keeping away from the heating member is difficult to by the heating, makes cigarette heating inhomogeneous.

Increasing the contact area between the heating body and the tobacco medium optimises the problem, but increasing the contact area by directly modifying the shape of the heating body makes it difficult to insert the cigarettes. Meanwhile, the shape of the resistance-type heating body is changed, and each heating body is required to be communicated with a power supply system, so that any change of the heating body easily causes the internal wiring of the smoking set to be too complex, and the miniaturization and stable operation of the appliance are not facilitated.

Electromagnetic heating is very suitable for in the middle of using heating utensil as an efficient heating principle, can conveniently optimize the effect of heating homogeneity through the shape that changes the electromagnetic induction heating base member simultaneously, but electromagnetic induction heating base member heat conduction effect is stronger, measures and controls the temperature in the non-working area inadequately accurately.

Therefore, in order to easily produce the electromagnetic induction heating base body having the circumferentially distributed shape, the heating effect is optimized by using the circumferentially distributed electromagnetic induction heating base body shape. At the same time, it is necessary to be able to measure and feed back the temperature in the working area, so that the temperature control is more accurate, and in order to make the assembly of the components more compact and save space in small appliances such as aerosol-generating devices, it is necessary to develop an electromagnetic induction heating system.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the purpose is in order to increase the heated area of aerosol formation goods, makes the cigarette medium fully heat, and does not increase aerosol formation device's complexity and volume, and it is convenient, simple structure to generate heat the base member preparation simultaneously.

In order to solve the technical problem, the utility model adopts the following technical scheme:

an electromagnetic induction heating substrate for electromagnetic induction heating of an aerosol generating device comprises at least one first sheet-like induction heating body and at least one second sheet-like induction heating body,

the first sheet-shaped induction heating body and the second sheet-shaped induction heating body are integrally formed, distributed in the circumferential direction and connected to the central part together,

the first sheet type induction heating body includes reverse extension portions,

a second sheet-like induction heating body having a dividing line groove near the center portion, the dividing line groove not being closed at a position near the center portion of the first sheet-like induction heating body, the dividing line groove forming an outline of the reversely extending portion,

the first and second sheet-like induction-heatable bodies are folded in the same direction with respect to the central portion to be substantially perpendicular to the central portion, and when the first sheet-like induction-heatable body is folded with respect to the central portion, the reverse extending portion is reversely folded with respect to the central portion.

Further, the heating base includes the same number of bending lines N as the number of the sheet-like induction heating bodies.

Further, the bending line N is located at a boundary between the first sheet-like induction-heatable body and the central portion, and the second sheet-like induction-heatable body.

Further, the first sheet-like induction-heatable body and the second sheet-like induction-heatable body are folded along the bending line N with respect to the central portion.

Further, the first and second sheet-like induction-heatable bodies constitute a heating zone for heating a portion away from the central portion with respect to the bending line N.

Further, the reverse extension is opposite to the heating zone along the bending line N.

Further, a temperature sensor is covered on the surface of the heating substrate.

Further, the temperature sensor is provided on the first sheet-like induction heating body.

Further, the temperature sensor is provided with a temperature measuring electrode.

Further, the temperature measuring electrode is positioned on the reverse extension part.

Furthermore, the temperature sensor is composed of a high-temperature-resistant first insulating coating, a temperature measuring circuit, a high-temperature-resistant second insulating coating and a thin metal sheet.

Further, the high-temperature-resistant first insulating coating, the temperature measuring circuit, the high-temperature-resistant insulating second coating and the thin metal sheet are sequentially coated on the first sheet-shaped induction heating body.

Further, a temperature measuring line extends from the heating area to the reverse extension portion.

Further, the thin metal sheet and the first sheet-like induction heating body are brought into close contact with each other by evacuation, isostatic pressing, and the like.

Furthermore, the temperature measuring circuit is tightly attached to the first sheet-shaped induction heating body of the high-temperature-resistant first insulating coating.

Further, sintering is carried out under the reducing condition, and a protective glaze layer is coated on the outer surface of the heating body after sintering.

Further, an end point connecting line M at the non-closed position of the dividing line groove forms a 90-degree angle with the extending direction of the first sheet-shaped induction heating body.

Furthermore, the electromagnetic induction heating matrix also comprises a base

Further, the base circumferentially surrounds and engages the central portion.

Further, the base does not substantially cover the reverse extension and the shielding thermometric electrode and the heating zone.

Furthermore, the base is made of a high-temperature-resistant and magnetic induction-insensitive material.

Further, the base is made of PEEK.

Further, the base is made of high-temperature-resistant ceramics, such as zirconia, alumina and the like.

An induction heating system comprising a heated substrate according to any preceding claim, further comprising an electromagnetic induction coil, the heated region in the heated substrate being subjected to a varying magnetic field generated by the electromagnetic induction coil for induction heating.

An aerosol-generating device comprising the heating system described above, further comprising a housing, a power supply, a control circuit and the like.

Wherein the aerosol-generating article is a smoking article comprising an aerosol-forming substrate which generates upon heating an aerosol which is inhalable directly into a user's lungs through the user's mouth.

Preferably, the aerosol-forming substrate is a solid aerosol-forming substrate. The aerosol-forming substrate may comprise both solid and liquid components.

Preferably, the aerosol-forming substrate comprises nicotine. In some preferred embodiments, the aerosol-forming substrate comprises tobacco. For example, the aerosol-forming material may be formed from a sheet of homogenised tobacco.

Alternatively or additionally, the aerosol-forming substrate may comprise a tobacco-free aerosol-forming material. For example, the aerosol-forming material may be a sheet comprising a nicotine salt and an aerosol former.

If the aerosol-forming substrate is a solid aerosol-forming substrate, the solid aerosol-forming substrate may comprise one or more of a powder, granules, pellets, fragments, shreds, sticks or sheets containing one or more of herbaceous plant leaves, tobacco ribs, flat tobacco and homogenised tobacco.

Preferably, the aerosol-forming substrate comprises a plug comprising a gathered sheet of homogenised tobacco material or other aerosol-forming material surrounded by a wrapper.

In this patent, aerosol former is used to describe any suitable known compound or mixture of compounds which, in use, promotes the formation of an aerosol and which is substantially resistant to thermal degradation at the operating temperature of the aerosol-generating article.

Suitable aerosol-forming agents are known in the art and include, but are not limited to: polyols such as propylene glycol, triethylene glycol, 1,3-butanediol, and glycerol; esters of polyhydric alcohols, such as glycerol monoacetate, glycerol diacetate, or glycerol triacetate; and aliphatic esters of mono-, di-or polycarboxylic acids, such as dimethyl dodecanedioate and dimethyl tetradecanedioate. Preferred aerosol formers are polyols or mixtures thereof, such as propylene glycol, triethylene glycol, 1,3-butanediol, and most preferably glycerol.

The aerosol-forming substrate may comprise a single aerosol former. Alternatively, the aerosol-forming substrate may comprise a combination of two or more aerosol-forming agents.

Preferably, the aerosol-forming substrate has an aerosol former content of greater than 5% by dry weight. More preferably, the aerosol-forming substrate may have an aerosol former content of between about 5% and about 30% by dry weight. In one embodiment, the aerosol-forming substrate has an aerosol former content of about 20% by dry weight.

Aerosol-forming substrates, including those used to homogenise tobacco sheets in aerosol-generating articles, may be manufactured by processes known in the art, such as roller compaction, pulp and paper processes.

Aerosol-forming articles may take the form of conventional cigarettes, cigarette items such as cigarettes and their specifications are generally denominated in terms of the length of the cigarette, as described below. By "standard", it is meant generally a cigarette having a length in the range 68mm to 75mm, for example in the range about 68mm to about 72mm, by "short" or "mini", a cigarette having a length of 68mm or less, by "standard out", a cigarette having a length in the range 75mm to 91mm, for example in the range about 79mm to about 88mm, by "long" or "extra", a cigarette having a length in the range 91mm to 105mm, for example in the range about 94mm to about 101mm, and by "extra long", a cigarette having a length in the range about 110mm to about 121 mm. In addition, the cigarette items are named according to the cigarette circumference, as described below. The term "standard" means a cigarette having an outer circumference of about 23mm to 25mm, the term "thick" means a cigarette having an outer circumference of 25mm or more, the term "thin" means a cigarette having an outer circumference of about 22mm to 23mm, the term "slender" means a cigarette having an outer circumference of about 19mm to 22mm, the term "ultra-thin" means a cigarette having an outer circumference of about 16mm to 19mm, and the term "fine" means a cigarette having an outer circumference of about 16mm or less. Thus, an over-sized and ultra-fine cigarette has a length of, for example, about 83mm and an outer circumference of about 17 mm. Standard, out-of-standard types of cigarettes, i.e. those having a length of 75-91 mm and an outer circumference of 23-25 mm, are favored by many customers. The cigarette articles of each specification may be manufactured to have filters of different lengths. In general, a short filter is used for a cigarette article of a short size in both length and outer circumference. Typically, the filter length ranges from 15mm for use with "short" and "standard" sized smoking articles to 30mm for use with "extra long" and "extra fine" sized smoking articles. The length of the tipping paper in the longitudinal direction of the filter-tipped cigarette article is longer than the filter, for example, by 3mm to 10mm.

Preferably, the aerosol-forming article comprises an aerosol-forming substrate, a support element, an aerosol-cooling element and a mouthpiece. Preferably, the aerosol-forming substrate, the support element, the aerosol-cooling element and the mouthpiece are substantially cylindrical and have substantially comparable outer diameters. For example, having an outer diameter of at least 5 mm. Preferably, it has an outer diameter of between about 5mm and about 12mm, such as between about 5mm and about 10mm or between about 6mm and about 8 mm. In a preferred embodiment, it has an outer diameter of 7.2mm +/-10%.

Preferably, the aerosol-forming substrate may have a length of between about 5mm and about 15mm, for example between about 8mm and about 12 mm. In a preferred embodiment, the aerosol-forming substrate has a length of about 12 mm.

The support element may be located immediately downstream of the aerosol-forming substrate and may be in close proximity to the aerosol-forming substrate.

The support element may be formed from any suitable material or combination of materials. For example, the support element may be formed of one or more materials selected from the group consisting of: cellulose acetate; a paperboard; crimped paper, such as crimped heat-resistant paper or crimped parchment paper; and polymeric materials such as Low Density Polyethylene (LDPE). In a preferred embodiment, the support element is formed from cellulose acetate.

The support element may comprise a hollow tubular element. In a preferred embodiment, the support element comprises a medium cellulose acetate tube.

The aerosol-cooling element may be located downstream of the aerosol-forming substrate, for example the aerosol-cooling element may be located immediately downstream of the support element, and may be in close proximity to the support element. The aerosol-cooling element may also be located between the support element and the mouthpiece, which is located at the most downstream end of the aerosol-generating article.

The aerosol-cooling element may have a total surface area of between about 300 square millimeters per millimeter of length and about 1000 square millimeters per millimeter of length. In a preferred embodiment, the aerosol-cooling element has a total surface area of about 500 square millimetres per millimetre of length.

Preferably, the aerosol-cooling element has a low resistance to draw. That is, preferably, the aerosol-cooling element provides a low resistance to the passage of air through the aerosol-generating article. Preferably, the aerosol-cooling element does not substantially affect the resistance to draw of the aerosol-generating article.

The aerosol-cooling element may comprise a plurality of longitudinally extending channels. The plurality of longitudinally extending channels may be defined by a sheet of material that has been subjected to one or more of crimping, pleating, gathering and folding to form the channels. The plurality of longitudinally extending channels may be defined by a single sheet that has been subjected to one or more of crimping, pleating, gathering and folding to form the plurality of channels. Alternatively, the plurality of longitudinally extending channels may be defined by a plurality of sheets that have been subjected to one or more of crimping, pleating, gathering and folding to form the plurality of channels.

In some embodiments, the aerosol-cooling element may comprise a gathered sheet of material selected from the group consisting of: metal foils, polymeric materials and substantially non-porous paper or paperboard. In some embodiments, the aerosol-cooling element may comprise a gathered sheet of a material selected from the group consisting of: polyethylene (PE), polypropylene (PP), polyvinyl chloride (PVC), polyethylene terephthalate (PET), polylactic acid (PLA), cellulose Acetate (CA), and aluminum foil. In a preferred embodiment, the aerosol-cooling element comprises a gathered sheet of biodegradable material. For example, a gathered sheet of non-porous paper or a gathered sheet of biodegradable polymeric material (such as polylactic acid).

The aerosol-cooling element may be formed from a gathered sheet of material having a specific surface area of between about 10 square millimeters per milligram to about 100 square millimeters per milligram of weight. In some embodiments, the aerosol-cooling element may be made of a material having a thickness of about 35mm ² Aggregated sheets of material per mg of specific surface area are formed.

The aerosol-generating article may comprise a mouthpiece located at the mouth end of the aerosol-generating article. The mouthpiece may be located immediately downstream of and in close proximity to the aerosol-cooling element. The mouthpiece may comprise a filter. The filter may be formed from one or more suitable filter materials. Many such filter materials are known in the art. In one embodiment, the mouthpiece may comprise a filter formed from cellulose acetate tow.

Elements of the aerosol-generating article (e.g. the aerosol-forming substrate and any other elements of the aerosol-generating article, such as the support element, the aerosol-cooling element and the mouthpiece) are surrounded by an outer wrapper. The outer wrapper is formed of any suitable material or combination of materials. Preferably, the outer wrapper is cigarette paper.

Smoking articles, i.e. aerosol-generating devices, are used to describe devices that interact with an aerosol-forming substrate of an aerosol-generating article to generate an aerosol. Preferably, the aerosol-generating device is a smoking device that interacts with an aerosol-generating substrate of an aerosol-generating article to generate an aerosol that is directly inhalable into a user's lungs through the user's mouth. The aerosol-generating device may be a holder for a smoking article.

The heating mode of the smoking set can utilize the principle of resistance heating, and can also utilize the principles of infrared heating and electromagnetic induction heating. The resistance heating mainly comprises inner core heating, peripheral heating and internal and external mixed heating. The infrared heating mainly comprises peripheral heating, which is a better use scene of the utility model. The magnetic induction heating includes an induction coil and an electromagnetic induction heating substrate, the electromagnetic induction heating substrate is generally called a susceptor, and the induction coil is generally called an inductor. The electromagnetically inductive heating substrate as part of the heater may be provided on the aerosol-generating device or in the aerosol-generating article. The heater is preferably needle, strip, leaf or tube shaped.

In this patent, the aerosol generating device employs an electromagnetic induction heating system.

The electromagnetic induction heating body is made of a material that can convert electromagnetic energy into heat. When located in a fluctuating electromagnetic field, eddy currents induced in the electromagnetic induction heating substrate cause heating of the electromagnetic induction heating substrate. When the elongate electromagnetic induction heating body is positioned in thermal contact with the aerosol-forming substrate, the aerosol-forming substrate is heated by the electromagnetic induction heating substrate.

The aerosol-generating article is designed to engage with an electrically operated aerosol-generating device comprising an inductive heating source. An inductive heating source or inductor generates a fluctuating electromagnetic field for heating a susceptor located within the fluctuating electromagnetic field. In use, the aerosol-generating article is engaged with the aerosol-generating device such that the susceptor is located within the fluctuating electromagnetic field generated by the inductor.

The susceptor has a length dimension that is greater than its width dimension or its thickness dimension, for example greater than twice its width dimension or its thickness dimension. Thus the susceptor may be described as an elongated susceptor. The susceptor may be arranged substantially longitudinally within the aerosol-generating substrate. This means that the length dimension of the elongated susceptor is arranged approximately parallel to the longitudinal direction of the aerosol-generating substrate, for example within plus or minus 10 degrees of parallel to the longitudinal direction of the aerosol-generating substrate. In a preferred embodiment, the elongate susceptor may be located at a radially central portion within the aerosol-generating substrate and extend along a longitudinal axis of the aerosol-generating substrate.

The susceptor may be made of any material which is capable of being inductively heated to a temperature sufficient for the aerosol-forming substrate to generate an aerosol. Preferred susceptors include metals or carbon. Preferred susceptors may comprise ferromagnetic materials such as ferrite, ferromagnetic steel or stainless steel. Suitable susceptors may be or may include aluminum. Preferred susceptors may be made from 400 series stainless steel, such as grade 410, grade 420 or grade 430 stainless steel. Different materials will dissipate different amounts of energy when placed in electromagnetic fields having similar frequency and field strength values. Thus, parameters of the susceptor, such as material type, length, width and thickness, can be varied within a known electromagnetic field to provide the desired energy consumption.

It is possible to heat the preferred sensor to temperatures in excess of 250 degrees celsius. Suitable susceptors may include non-metallic cores having a metal layer disposed on the non-metallic core, such as metal traces formed on the surface of a ceramic core.

The susceptor may have an outer protective layer, such as a ceramic or glass protective layer, encapsulating the elongated susceptor, thereby forming a complete heating body. The susceptor may include a protective coating formed of glass, ceramic, or inert metal formed on a core of susceptor material.

The susceptor is arranged in thermal contact with the aerosol-forming substrate. Thus, when the susceptor is heated, the aerosol-forming substrate is heated and an aerosol is formed. In one embodiment, the heating body comprising the susceptor is inserted into the aerosol-forming substrate, and the aerosol-generating device may comprise a single or multiple elongate heating bodies. In another embodiment, the aerosol-generating substrate may comprise a susceptor, alternatively the aerosol-generating substrate may comprise a plurality of susceptors.

The aerosol-generating device is capable of generating a fluctuating electromagnetic field of between about 1MHz and 30MHz, such as between 2MHz and 10MHz, such as between 5MHz and 7MHz, by means of the induction coil of the induction transmitter. The induction coil material should be selected from materials with good conductive effect, such as metal and the like; in addition, in this patent, the material of the induction coil should have good elastic deformability, and can be made of spring steel, gold, silver, and other metals.

The aerosol-generating device is a portable or handheld aerosol-generating device that a user can comfortably hold between the fingers of a single hand. The aerosol-generating device may be substantially cylindrical in shape. The aerosol-generating device may have a length of between about 70 mm and about 120 mm.

The power supply of the aerosol-generating device may be any suitable power supply, for example a dc voltage source, such as a battery. In one embodiment, the power source is a lithium ion battery. Alternatively, the power source may be a nickel metal hydride battery, a nickel cadmium battery, or a lithium based battery, such as a lithium cobalt, lithium iron phosphate, lithium titanate, or lithium polymer battery. The weight of the power source should be such that the smoking article weight as a whole can be comfortably held between the fingers of a single hand of a user.

The technical effects of the utility model are as follows:

(1) On the premise of not increasing the complexity and the volume of the heating smoking set, the heating area of the aerosol generating product is increased by designing the shape and the arrangement of the heating components for induction heating, so that the aerosol generating product is uniformly and fully heated;

(2) Due to the electromagnetic heating mode and the structure of the high contact area of the inductor, the effective heating temperature required by the electromagnetic induction heating base body is lower than that of the traditional inner core resistance heating smoking set, so that the safety of the smoking set is improved, and the power consumption is reduced;

(3) The size, shape and arrangement of the heating assembly are more beneficial to the insertion of the disordered tobacco cigarette than the prior art;

(4) The close relative position of the first sheet-shaped induction heating body and the temperature sensor and the configuration of the temperature sensor directly in the heating area ensure the independence and the accuracy of the monitoring of the heating temperature;

(5) The first induction heating body, the second induction heating body and other induction heating bodies which may exist in the inductor are integrally formed and are connected with each other through the base connecting part, so that the areas surrounded by the plurality of heating bodies form an effective magnetic flux area, and the intensity of induction potential can be greatly increased compared with the plurality of independent heating bodies;

(6) The structure of the integrated induction heating body is manufactured in a blanking and bending mode, so that the process complexity and the production cost are greatly reduced;

(7) The inductor is formed in a cold machining mode, so that the influence of high-temperature machining on the magnetic conductivity of materials such as stainless iron is avoided;

(8) The base and the support piece are matched to provide a firm, stable and simple fixing structure for the temperature sensor and the inductor;

to sum up, the utility model provides a convenient operation, low cost, control by temperature change sensitivity, simple structure, outstanding and small-size aerosol generating device of effect of fuming.

Drawings

The foregoing technical content of the present invention as well as the following detailed description of the present invention will be better understood when read in conjunction with the accompanying drawings. It is to be noted that the figures are only intended as examples of the claimed solution. In the drawings, like reference characters designate the same or similar elements.

Fig. 1 is a schematic perspective view of an electromagnetic induction heating substrate (in an expanded state) according to an embodiment of the present invention;

FIG. 2 is a perspective view of an embodiment of the present invention showing an electromagnetic induction heating substrate having a bending line (in an unfolded state);

fig. 3a is a schematic perspective view illustrating the first sheet-like induction heating member folded upward according to an embodiment of the present invention;

fig. 3b is a schematic perspective view illustrating the second sheet-like induction heating member folded upward according to an embodiment of the present invention;

fig. 3c is a schematic perspective view illustrating that all the sheet-shaped induction heating units are folded upward according to an embodiment of the present invention;

fig. 4 is a schematic perspective view of a temperature sensor and an electromagnetic induction heating substrate according to an embodiment of the present invention;

fig. 5 is a schematic perspective view of an electromagnetic induction heating substrate coated with a temperature sensor according to an embodiment of the present invention;

fig. 6 is a schematic view of an electromagnetic induction heating substrate and base in an embodiment of the invention;

wherein the reference numerals are as follows:

101 first sheet-like induction heating body

104 a reverse extension;

105 a heating zone;

106 parts with sharp thorn

200 a central portion;

300-division wire slot

400 temperature sensor

401 high temperature resistant first insulating coating

402 temperature measuring circuit

403 high temperature resistant second insulating coating

404 thin metal sheet

405 thermometric electrode

500 base

Detailed Description

The detailed features and advantages of the invention are described in the detailed description which follows, and will be readily apparent to those skilled in the art from that description or recognized by practicing the invention as described herein, together with the objects and advantages thereof.

For ease of understanding, the terms "upper", "lower", "top", "bottom", and the like are used herein with reference to the upright position of the electromagnetic induction heating substrate.

FIG. 1 illustrates one embodiment of an electromagnetically inductive heated substrate. In this embodiment, the electromagnetic induction heating substrate includes a first induction heating body 101 and a second induction heating body, and the induction heating bodies are circumferentially distributed. The first induction heating element 101 and the second induction heating element are integrally connected by a center portion 200. Within the central portion 200 is an unclosed cutting line slot 300, the cutting line of the cutting line slot 300 constituting the outline of the counter-extension 104.

The manufacturing method of the embodiment comprises the following steps: the sheet material is cut into a planar unfolded shape of the electromagnetic induction heating base (as shown in fig. 1), and preferably, a sheet metal type induction heating body material is used to form a planar unfolded state of the electromagnetic induction heating base through laser, wire cutting and other modes. The manufacturing method of the embodiment reduces the process complexity and the production cost. The inductor formed by the cold machining mode avoids the influence of high-temperature machining on the magnetic permeability of materials such as stainless iron and the like.

Fig. 3a, 3b and 3c show an embodiment of the electromagnetic induction heating substrate. In this embodiment, the electromagnetic induction heating substrate includes a first induction heating body 101 and a second induction heating body, and the induction heating bodies are respectively processed to the assembling position, preferably, a stamping or bending method may be used. The first and second sheet-shaped induction heating bodies 101 and 104 are folded back in the same direction with respect to the central portion 200 to be substantially perpendicular to the central portion 200, and when the first sheet-shaped induction heating body 101 is folded back with respect to the central portion 200, the reverse extending portion 104 is folded back with respect to the central portion 200. Since the sheet-like induction heaters are connected to each other through the central portion 200, the regions surrounded by the plurality of heaters constitute effective magnetic flux regions, and the intensity of the induction potential can be greatly increased as compared with a plurality of independent heaters.

Optionally, the first induction heating unit 101 and the second induction heating unit may be arranged in a central symmetric array, an axisymmetric array, or a triangular layout. Further, the number of the first induction-heatable bodies may also be plural, and the number of the second induction-heatable bodies may also be two or more.

Preferably, as shown in fig. 2, the heating base includes bending lines N having the same number as the sheet-shaped induction heating bodies, the bending lines N are located at the respective junctions of the first sheet-shaped induction heating body 101 and the second sheet-shaped induction heating body with the central portion 200, the first sheet-shaped induction heating body 101 and the second sheet-shaped induction heating body are folded along the bending lines N with respect to the central portion 200, the portions of the first sheet-shaped induction heating body 101 and the second sheet-shaped induction heating body away from the central portion 200 with respect to the bending lines N constitute heating zones 105 for heating, and the reverse extension portions 104 are opposite to the heating zones 105 along the bending lines N.

FIG. 4 illustrates one embodiment of an electromagnetically inductive heated substrate. In this embodiment, the temperature sensor is applied to the surface of the first sheet-like electromagnetic induction heating body 101, and the temperature sensor 400 has a thermometric electrode 405, the thermometric electrode 405 being located on the reverse extension 104. The temperature sensor 400 may be composed of a high temperature-resistant first insulating coating 401, a temperature measuring line 402, a high temperature-resistant second insulating coating 403, and a thin metal sheet 404, which are sequentially coated on the first sheet-like induction-heatable body 101 with the temperature measuring line 402 extending from the heating zone 105 to the reverse extending portion 104. The temperature sensor 400 has a thermometric electrode 405, the thermometric electrode 405 being located on the reverse extension 104. Through the above configuration, the temperature of the heating area 105 can be measured more directly and more accurately, and the measurement error is effectively reduced.

As shown in fig. 3a, 3b, 3c and 4, the manufacturing method of the present embodiment includes:

preparing a metal sheet having a desired shape of an electromagnetic induction heating substrate, the metal sheet including a central portion 200 and three heating bodies extending outward from the central portion;

cutting an unclosed split line groove 300 in the range of the central part 200 of the metal sheet, so that the split line groove is unclosed at the boundary position close to the central part and one of the heating bodies 101, and the end point connecting line M of the unclosed part and the extending direction of the heating body 101 from the central part are basically 90 degrees;

bending the heating body so as to be bent substantially perpendicularly with respect to the central portion 200 while the reverse extending portion 104 defined by the dividing line groove 300 is bent substantially perpendicularly with respect to the central portion together with the first sheet-like induction heating body 101 so as to be maintained in the same plane as the first sheet-like induction heating body 101;

the remaining two heating bodies are subjected to a bending process so as to be bent substantially perpendicularly with respect to the central portion 200 in the same manner as the previous heating body 101.

In this way, the basic configuration of the electromagnetic induction heating substrate is completed.

For monitoring the temperature of the heating assembly. The manufacturing method of the embodiment comprises the following steps:

after the bending process, the high temperature resistant first insulating coating 401, the temperature measuring circuit 402, the high temperature resistant second insulating coating 403 and the thin metal sheet 404 are sequentially coated on the first sheet-like induction heating body 101, and the temperature measuring circuit is extended from the heating body 101 to the reverse extension portion 104. Preferably, the thin metal sheet 404 and the first sheet-like induction heating body 101 are brought into close contact by evacuation, isostatic pressing, or the like, and then they are sintered under reducing conditions. Advantageously, the outer surface of the heating body after the final sintering is coated with a protective glaze layer.

Preferably, after the sinter coating process, the base 500 is circumferentially wrapped and bonded to the central portion 200 such that the base does not substantially cover the counter-extending portion 104 and the plurality of heating zones 105. Thus, the base 500 can provide support for the electromagnetic induction heating substrate, so as to facilitate positioning and installation in the electromagnetic induction heating system, and meanwhile, the heating function and the temperature measuring function of the induction heating substrate are not affected.

FIG. 5 illustrates one embodiment of an electromagnetic induction heated substrate. In this embodiment, there are three electromagnetic induction heating elements 101 arranged in an equilateral triangle. The top of each sheet-shaped electromagnetic induction heating body is provided with a spine part 106, and the electromagnetic induction heating matrix is inserted into the aerosol generating product in the using process. Optionally, the point angle of the spikes 106 is less than 30 °. All the sheet-like electromagnetic induction heaters 101 are integrally mounted on the base 500.

Fig. 6 shows an embodiment of a base 500. The base 500 is used for fixing the electromagnetic induction heating substrate, and the base 500 does not cover the temperature measuring electrode 405 and the heating area 105. Preferably, the base 500 is made of a high temperature resistant material, such as:

(1)PEEK；

(2) Metals insensitive to magnetic induction, such as stainless steel, etc.;

(3) High temperature ceramics such as zirconia, alumina, etc.

To sum up, the utility model discloses a convenient operation, low cost, control by temperature change sensitivity, simple structure, outstanding and small-size electromagnetic induction heating base member of effect of fuming.

The terms and expressions which have been employed are used as terms of description and not of limitation. The use of such terms and expressions is not intended to exclude any equivalents of the features shown and described (or portions thereof), and it is recognized that various modifications may be made which are within the scope of the claims. Other modifications, variations, and alternatives are also possible. Accordingly, the claims should be looked to in order to cover all such equivalents.

Also, it should be noted that, although the present invention has been described with reference to the specific embodiments, it should be understood by those skilled in the art that the above embodiments are only for illustrating the present invention, and that various equivalent changes or substitutions can be made without departing from the spirit of the present invention, and therefore, it is intended that all changes and modifications to the above embodiments within the scope of the present invention be included in the claims of the present invention.

Claims (11)

1. An electromagnetic induction heating substrate for electromagnetic induction heating of an aerosol-generating device, comprising at least one first sheet-like induction-heatable body (101) and at least one second sheet-like induction-heatable body,

the first sheet-like induction heating body (101) and the second sheet-like induction heating body are integrally formed, circumferentially distributed and commonly connected to a central portion (200),

the first sheet-like induction-heatable body (101) includes a reverse extension (104),

the second sheet-like induction-heatable body has a dividing line groove (300) near the central portion (200), the dividing line groove (300) is not closed at a position where the first sheet-like induction-heatable body (101) is near the central portion (200), the dividing line groove (300) forms an outline of the reverse extension portion (104),

the first sheet-like induction heating body (101) and the second sheet-like induction heating body are folded in the same direction with respect to the central portion (200) so as to be substantially perpendicular to the central portion (200), and when the first sheet-like induction heating body (101) is folded with respect to the central portion (200), the reversely extending portion (104) is reversely folded with respect to the central portion (200).

2. The electromagnetic induction heating base according to claim 1, wherein the heating base includes a bending line (N) equal to the sum of the numbers of the first sheet-like induction heating body (101) and the second sheet-like induction heating body, the bending line (N) is located at a boundary between each of the first sheet-like induction heating body (101) and the second sheet-like induction heating body and the central portion (200), the first sheet-like induction heating body (101) and the second sheet-like induction heating body are folded along the bending line (N) with respect to the central portion (200), a portion of the first sheet-like induction heating body (101) and the second sheet-like induction heating body, which is far from the central portion (200), with respect to the bending line (N) constitutes a heating zone (105) for heating, and the reverse extension portion (104) is opposite to the heating zone (105) along the bending line (N).

3. The electromagnetic induction heating base according to claim 2, wherein a temperature sensor (400) is coated on a surface of the electromagnetic induction heating base, the temperature sensor (400) is provided on the first sheet-like induction heating body (101), the temperature sensor (400) has a temperature measuring electrode (405), and the temperature measuring electrode (405) is located on the backward extending portion (104).

4. An electromagnetic induction heated substrate according to claim 3, characterised in that the temperature sensor (400) is composed of a high temperature resistant first insulating coating (401), a thermometric circuit (402), a high temperature resistant second insulating coating (403) and a thin metal sheet (404) and is coated on the first sheet-like induction heated body (101) in this order, the thermometric circuit (402) extending from the heating zone (105) to the counter-extension (104).

5. The electromagnetic induction heating substrate according to claim 4, wherein the thin metal sheet (404) is formed by subjecting the thin metal sheet (404) and the first sheet-like induction heating body (101) to vacuum evacuation and isostatic pressing so as to be closely adhered to the first sheet-like induction heating body (101) coated with the high-temperature-resistant first insulating coating (401), the temperature measuring line (402), and the high-temperature-resistant second insulating coating (403), and sintering the adhered materials under a reducing condition.

6. The electromagnetic induction heating substrate according to claim 5, wherein the heating substrate after sintering has an outer surface coated with a protective glaze layer.

7. The electromagnetic induction heating base according to claim 1, wherein an end point connecting line (M) where the dividing line groove (300) is not closed is 90 ° to a direction in which the first sheet-like induction heating body (101) protrudes from the center portion (200).

8. The electromagnetically induction heated matrix according to any one of claims 3-6, further comprising a base (500), said base (500) circumferentially surrounding and engaging said central portion (200), said base (500) substantially not covering said counter-extension (104) nor shielding said thermometric electrode (405) and said heating zone (105).

9. The heating substrate according to claim 8, wherein the base (500) is made of a material that is resistant to high temperature and insensitive to magnetic induction.

10. An electromagnetic induction heating system comprising a heated substrate according to any of claims 2 to 9, and further comprising an electromagnetic induction coil, wherein the heated region (105) in the heated substrate is placed in a changing magnetic field generated by the electromagnetic induction coil for induction heating.

11. An electromagnetic induction heating apparatus comprising the induction heating system of claim 10, further comprising a housing, a power supply, and a control circuit.

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