CN114766719A - Electromagnetic induction heating base body and system thereof - Google Patents

Abstract

The invention discloses an electromagnetic induction heating substrate, which is used for electromagnetic induction heating of an aerosol generating device and comprises a first sheet-shaped induction heating body and a second sheet-shaped induction heating body, wherein the first sheet-shaped induction heating body and the second sheet-shaped induction heating body are integrally formed, are distributed in the circumferential direction and are connected to a central part together, the first sheet-shaped induction heating body comprises a reverse extension part, a dividing line groove is arranged at the position, close to the central part, of the second sheet-shaped induction heating body, the dividing line groove is not closed at the position, close to the central part, of the first sheet-shaped induction heating body, and the dividing line groove forms the outline of the reverse extension part, and when the first sheet-shaped induction heating body is turned over relative to the central part, the reverse extension part is turned over relative to the central part.

Description

Electromagnetic induction heating base body and system thereof

Technical Field

The invention relates to the field of novel tobacco, in particular to an electromagnetic induction heating substrate and an electromagnetic induction heating system.

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 with the heating inner core is convenient for the cigarette to be inserted, a needle-type heating body is usually used, the cross-sectional area of the heating body needs to be smaller, so that the cigarette medium close to the heating body is excessively heated in the heating process of the cigarette, the cigarette medium far away from the heating body is difficult to heat, and the cigarette is heated unevenly.

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 needs 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 smoking set 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 desirable to be able to measure and feedback temperature at the work area, so that temperature control is more accurate, and to make the assembly of components tighter and save space in small appliances such as aerosol-generating devices, an electromagnetic induction heating system needs to be developed.

Disclosure of Invention

The invention aims to increase the heating area of an aerosol generating product, fully heat the aerosol, avoid increasing the complexity and the volume of an aerosol generating device, and simultaneously ensure that a heating substrate is convenient to prepare and has a simple structure.

In order to solve the technical problems, the invention 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-shaped induction heating body and at least one second sheet-shaped 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 bend 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 sheet-like induction-heatable body and the second sheet-like induction-heatable body constitute a heating zone for heating a portion away from the central portion with respect to the bend 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 insulating coating, a temperature measuring circuit, a high-temperature-resistant insulating coating and a thin metal sheet.

Further, the high-temperature-resistant insulating coating, the temperature measuring circuit, the high-temperature-resistant insulating 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 part.

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 insulating coating.

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

Furthermore, the end point connecting line M at the non-closed position of the dividing line slot 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 substantially uncovers the reverse extension and the shielded thermometric electrode and 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 placed in a varying magnetic field generated by the electromagnetic induction coil for induction heating.

An aerosol-generating device comprises the heating system, and further comprises a shell, a power supply, a control circuit and the like.

A manufacturing method for any one of the above electromagnetic induction heating substrates, comprising: preparing a metal sheet having a desired shape of the electromagnetic induction heating base, the metal sheet including a central portion and a plurality of heating bodies extending outwardly from the central portion; cutting an unclosed dividing line slot in the range of the central part of the metal sheet, so that the dividing line slot is unclosed at a position close to the junction of the central part and at least one first sheet-shaped induction heating body, and an end point connecting line M of the unclosed position is formed by basically forming an angle of 90 degrees in the extending direction of the at least one first sheet-shaped induction heating body from the central part; bending the at least one first sheet-shaped induction-heatable body so as to be bent substantially perpendicularly with respect to the central portion, while the reverse extensions defined by the dividing line grooves are bent substantially perpendicularly with respect to the central portion together with the at least one heatable body so as to be maintained in the same plane as the at least one heatable body; the remaining heating bodies are subjected to a bending process so as to be bent substantially perpendicularly with respect to the central portion in the same manner as the at least one heating body.

Further, after the bending process, a high temperature resistant insulating coating, a temperature measuring line, a high temperature resistant insulating coating, and a thin metal sheet are sequentially coated on the at least one first sheet-like induction heating body, and the temperature measuring line extends from the at least one heating body to the reverse extension portion.

Further, the thin metal sheet is closely attached to the at least one heating body coated with the high temperature resistant insulating coating, the temperature measuring line and the high temperature resistant insulating coating by at least vacuum pumping and isostatic pressing, and is sintered under a reducing condition.

Further, a protective glaze layer is coated on the outer surface of the sintered heating body.

Further, a base is finally circumferentially wrapped and joined to the central portion so that the base does not substantially cover the thermometric electrode and the plurality of heaters.

Wherein the aerosol-generating article is a smoking article comprising an aerosol-forming substrate that generates, by heating, an aerosol that 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, a granule, a pellet, a chip, a rod or a sheet, 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 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: polyhydric alcohols such as propylene glycol, triethylene glycol, 1, 3-butanediol, and glycerin; esters of polyhydric alcohols, such as monoacetin, diacetin, or triacetin; 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.

The aerosol-forming article may have the appearance of a conventional cigarette, cigarette-like smoking articles and their specifications are generally denominated in terms of the length of the cigarette, as described below. By "standard", it is generally meant cigarettes of length ranging from 68mm to 75mm, for example from about 68mm to about 72mm, by "short" or "mini", cigarettes of length below 68mm, by "standard", by cigarettes of length ranging from 75mm to 91mm, for example from about 79mm to about 88mm, by "long" or "lengthened", by cigarettes of length ranging from 91mm to 105mm, for example from about 94mm to about 101mm, and by "super-long", by cigarettes of length ranging from 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, over-standard types of cigarettes, i.e. those having a length of 75-91 mm and an outer circumference of 23-25 mm, are popular with 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 length and a short 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 10 mm.

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, 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 from 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 undergone 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 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, an aggregated sheet of non-porous paper or an aggregated 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 35mm²Aggregated sheets of material of specific surface area/mg 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 from 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, and is a better use scene of the invention. 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 electromagnetic induction 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 heated substrate cause heating of the electromagnetic induction heated 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 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. A suitable susceptor may comprise a non-metallic core 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, enclosing 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, a heating body comprising a susceptor is inserted into an aerosol-forming substrate, and the aerosol-generating device may comprise a single or a plurality of 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; 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 invention has the following technical effects:

(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) because of the electromagnetic heating mode and the structure of high contact area of the inductor, the effective heating temperature required by the electromagnetic induction heating matrix is lower than that of the traditional inner core resistance heating smoking set, 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 favorable for the insertion of the disordered tobacco cigarettes compared with 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 of 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 supporting piece are matched to provide a firm, stable and simple fixing structure for the temperature sensor and the sensor;

in summary, the present invention provides an aerosol generating device with convenient operation, low cost, sensitive temperature control, simple structure, excellent smoke generating effect and small volume.

Drawings

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

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

FIG. 2 is a schematic perspective view of an electromagnetic induction heated substrate including a bend line (in an unfolded state) according to an embodiment of the present invention;

fig. 3-a is a schematic perspective view showing the first sheet-like induction-heatable body folded upward in accordance with an embodiment of the present invention;

fig. 3b is a schematic perspective view of the second sheet-like induction-heatable body folded upward in one embodiment of the present invention;

fig. 3-c is a schematic perspective view showing that all the sheet-like induction-heatable bodies are folded upward in one embodiment of the present invention;

FIG. 4 is a 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 heated substrate coated with a temperature sensor according to an embodiment of the present invention;

FIG. 6 is a schematic view of an electromagnetic induction heated substrate and base in one embodiment of the invention.

Wherein the reference numerals are as follows:

101 first sheet-like induction heating body

102,103 second sheet-like induction heating body

104 oppositely extending part

105 heating zone

106 parts with sharp thorn

200 center section

300-division wire slot

400 temperature sensor

401 high temperature resistant insulating coating

402 temperature measuring circuit

403 high temperature resistant insulating coating

404 thin metal sheet

405 temperature measuring electrode

500 base

Detailed Description

The detailed features and advantages of the invention are described in the following detailed description, which is sufficient to enable one skilled in the art to understand the technical content of the invention and to implement the invention, and the related objects and advantages of the invention can be easily understood by one skilled in the art from the description, the claims and the accompanying drawings.

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 shows an embodiment of an electromagnetic induction heated substrate. In this embodiment, the electromagnetic induction heating base includes a first induction heating body 101 and second induction heating bodies 102 and 103, which are distributed circumferentially. The first induction-heatable body 101 and the second induction-heatable bodies 102,103 are integrally connected by a central 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-extending portion 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 body (as shown in fig. 1), and preferably, the planar unfolded state of the electromagnetic induction heating base body is formed by selecting an induction heating body material in a sheet metal form through modes of laser, linear cutting and the like. 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 an electromagnetic induction heating substrate. In the present embodiment, the electromagnetic induction heating substrate includes a first induction heating body 101 and second induction heating bodies 102 and 103, which are respectively processed to an assembly position, and preferably, a stamping or bending method may be used. The first and second sheet-like induction heating bodies 101, 102,103 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-like induction heating body 101 is folded back with respect to the central portion 200, the reversely extending portion 104 is reversely folded back with respect to the central portion 200. Since the sheet-shaped induction-heatable bodies are connected to each other through the central portion 200, the regions surrounded by the plurality of heating bodies constitute an effective magnetic flux region, and the intensity of the induction potential can be greatly increased as compared to the plurality of independent heating bodies.

Optionally, the first induction heating body 101 and the second induction heating bodies 102 and 103 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 a number of bend lines N equal to the number of the sheet-shaped induction heating bodies, the bend lines N are located at the boundary between each of the first sheet-shaped induction heating body 101 and the second sheet-shaped induction heating body 102,103 and the central portion 200, the first sheet-shaped induction heating body 101 and the second sheet-shaped induction heating body 102,103 are folded along the bend 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 102,103 away from the central portion 200 with respect to the bend lines N constitute heating zones 105 for heating, and the reverse extension portions 104 are opposite to the heating zones 105 along the bend lines N.

FIG. 4 shows an embodiment of an electromagnetic induction 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 insulating coating 401, a temperature measuring line 402, a high-temperature-resistant insulating coating 403, and a thin metal sheet 404, which are sequentially coated onto the first sheet-like induction heating body 101 with the temperature measuring line 402 extending from the heating zone 105 to the reverse extension 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. 3 to 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 101, 102,103 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 102,103 are subjected to a bending process so as to be bent substantially perpendicular with respect to the central portion 200 in the same manner as the preceding heating body 101.

Thus, 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 insulating coating 401, the temperature measuring line 402, the high-temperature-resistant insulating coating 403, and the thin metal sheet 404 are sequentially applied to the first sheet-like induction heating body 101, and the temperature measuring line 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 electromagnetically inductive heated substrate. In this embodiment, there are three electromagnetic induction heating elements 101, 102,103 in sheet form 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 heating bodies 101, 102,103 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.

In conclusion, the invention discloses the electromagnetic induction heating substrate which is convenient to operate, low in cost, sensitive in temperature control, simple in structure, excellent in smoke generating effect and small in size.

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 as may exist are also within the scope of the claims. Other modifications, variations, and alternatives are also possible. Accordingly, the claims are to be regarded as covering all such equivalents.

Also, it should be noted that although the present invention has been described with reference to the current specific embodiments, it should be understood by those skilled in the art that the above embodiments are merely illustrative of the present invention, and various equivalent changes or substitutions may be made therein 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 spirit of the present invention shall fall within the scope of the appended claims.

Claims (16)

1. An electromagnetic induction heating substrate for electromagnetic induction heating of an aerosol-generating device, comprising at least one first sheet-like induction heating body (101) and at least one second sheet-like induction heating body (102, 103), characterized in that,

the first sheet-like induction-heating body (101) and the second sheet-like induction-heating bodies (102, 103) are integrally formed, circumferentially distributed, and commonly connected to a center portion (200),

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

the second sheet-like induction-heatable body (102, 103) has dividing line grooves (300) near the central portion (200), the dividing line grooves (300) are not closed at the first sheet-like induction-heatable body (101) near the central portion (200), the dividing line grooves (300) form the contour of the reverse extension (104),

the first and second sheet-like induction heating bodies (101, 102, 103) 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 comprises the same number of bending lines (N) as the number of the sheet-like induction heating bodies (101, 102, 103), the bend line (N) is located at the boundary between the first sheet-like induction-heated body (101) and the second sheet-like induction-heated body (102, 103) and the central portion (200), the first sheet-like induction-heating body (101) and the second sheet-like induction-heating bodies (102, 103) are folded back along the bending line (N) with respect to the center portion (200), the first and second sheet-like induction-heatable bodies (101, 102, 103) constitute a heating zone (105) for heating at a portion away from the center portion (200) with respect to the bend line (N), the reverse extension (104) is opposite the heating zone (105) along the bend 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. The electromagnetic induction heating substrate according to claim 3, wherein the temperature sensor (400) is composed of a high temperature resistant insulating coating (401), a temperature measuring line (402), a high temperature resistant insulating coating (403), and a thin metal sheet (404), and is coated on the first sheet-like induction heating body (101) in this order, the temperature measuring line (402) extending from the heating zone (105) to the backward extending portion (104).

5. The electromagnetic induction heating base 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-pumping and isostatic pressing so that the thin metal sheet (404) and the first sheet-like induction heating body (101) covered with the high-temperature resistant insulating coating (401), the temperature measuring line (402), and the high-temperature resistant insulating coating (403) are closely adhered and sintered under reducing conditions.

6. The electromagnetic induction heating substrate as set forth in 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 electromagnetic induction heated matrix according to any of claims 2-7, further comprising a base (500), wherein the base (500) circumferentially surrounds and engages the central portion (200), and wherein the base (500) does not substantially cover the counter-extending portion (104) and the shielded thermometric electrodes (405) and 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 the heating substrate of any one of claims 2-9, further comprising an electromagnetic induction coil, the heating zone (105) in the heating substrate being placed in a varying magnetic field generated by the electromagnetic induction coil for induction heating.

11. An aerosol-generating device comprising the induction heating system of claim 10, further comprising a housing, a power supply, and a control circuit.

12. A method for manufacturing an electromagnetic induction heating substrate according to claim 1, comprising: preparing a metal sheet having a desired shape of the electromagnetic induction heating base, the metal sheet including a center portion (200) and a plurality of sheet-like induction heating bodies (101, 102, 103) extending outward from the center portion;

cutting an unclosed dividing line slot (300) in the range of the central part (200) of the metal sheet, so that the dividing line slot is not closed at the position close to the boundary position of the central part and at least one first sheet-shaped induction heating body (101), and an end point connecting line (M) at the unclosed position is at least substantially 90 degrees with the extending direction of the first sheet-shaped induction heating body (101) from the central part (200);

bending at least one of the first sheet-shaped induction-heatable bodies (101) so as to be bent substantially perpendicularly with respect to the central portion, while the reverse extension portions (104) defined by the dividing line grooves (300) are bent substantially perpendicularly with respect to the central portion (200) in reverse directions together with the at least one of the first sheet-shaped induction-heatable bodies (101) so as to be maintained in the same plane as the at least one of the first sheet-shaped induction-heatable bodies (101);

the remaining second sheet-like induction-heatable bodies (102, 103) were subjected to bending processing so as to be bent substantially perpendicularly with respect to the central portion in the same manner as the at least one first sheet-like induction-heatable body (101).

13. The manufacturing method of an electromagnetic induction heating base according to claim 12, characterized in that after the bending process, a high-temperature-resistant insulating coating (401), a temperature measuring line (402), a high-temperature-resistant insulating coating (403), and a thin metal sheet (404) are sequentially coated on the at least one first sheet-like induction heating body (101), the temperature measuring line extending from the at least one heating body to the reverse extension (104).

14. The manufacturing method of an electromagnetic induction heating base according to claim 13, characterized in that the thin metal sheet (404) is brought into close contact with the at least one first sheet-like induction heating body (101) coated with the high temperature resistant insulating coating (401), the temperature measuring line (402), and the high temperature resistant insulating coating (403) by evacuation and isostatic pressing, and is sintered under reducing conditions.

15. A method for producing an electromagnetic induction heating substrate according to claim 14, wherein a protective glaze layer is applied to an outer surface of the heating body after sintering.

16. The method of manufacturing an electromagnetic induction heating substrate according to any one of claims 13 to 15, wherein the base (500) is finally wrapped and joined circumferentially around the central portion (200) such that the thermometric electrode (405) and the plurality of heating zones (105) are substantially uncovered by the base (500).

Images