CN117814545A - Electromagnetic induction heating body, system and device thereof - Google Patents

Abstract

The invention discloses an electromagnetic induction heating body, a system and a device thereof, which are used for electromagnetic induction heating of an aerosol generating device.

Description

Electromagnetic induction heating body, system and device thereof

Technical Field

The invention relates to the field of novel tobaccos, in particular to an electromagnetic induction heating body, a system and a device thereof.

Background

Heated cigarettes are a type of new tobacco product, and are one option for consumers to reduce the harm caused by traditional tobacco. Conventional cigarettes are typically cigarettes of an unordered tobacco arrangement. In the development of new tobacco, in order to maximize the preservation of the flavor of traditional tobacco, one development direction is to directly perform the improvement of Heatable (Heatable) on the basis of traditional cigarettes. However, the following technical problem is that the cigarettes arranged in the disordered tobacco are difficult to insert compared with the existing internal heating smoking set, and the external heating smoking set has the problems of insufficient heating and the like.

The existing cigarette heating devices in the market mainly use the principle of resistance heating, and the heating modes mainly comprise inner core heating, peripheral heating and internal and external mixed heating. The cigarette with the inner core heating is convenient to insert, and a needle-type heating body is usually used, so that the cross-sectional area of the heating body needs to be smaller, the cigarette medium close to the heating body is excessively heated, and the cigarette medium far away from the heating body is difficult to heat in the heating process of the cigarette, and therefore the cigarette is unevenly heated.

The above problems can be optimized by increasing the contact area between the heating body and the cigarette medium, but the cigarette is difficult to insert by directly changing the shape of the heating body to increase the contact area. 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 too complex internal wiring of the smoking set, and the miniaturization and stable operation of the appliance are not facilitated.

Electromagnetic heating is very suitable for being applied to heating appliances as a high-efficiency heating principle, heating uniformity can be optimized conveniently by changing the shape of an electromagnetic induction heating body, and a common application method of electromagnetic induction heating is to pass high-frequency oscillating current through an induction coil to form a fluctuating electromagnetic field, so that eddy current is caused in the electromagnetic induction heating body arranged in the electromagnetic field, and the electromagnetic induction heating body generates heat to heat an object. The induction metal heating body is an important component part, and the feedback and control of the temperature of the metal induction heating body are key to the stable and good operation of the electromagnetic heating smoking set, however, the temperature is not accurately measured and controlled in a non-working area due to the strong heat conduction effect of the electromagnetic induction heating body.

Therefore, there is a need to be able to measure and feed back temperature in the core work area, so that temperature control is more accurate, and in order to make assembly of components more compact in a small-sized appliance such as an aerosol generating device, space is saved, and there is also a need to develop an electromagnetic induction heating system having a compact structure.

Disclosure of Invention

The invention aims to provide a sheet type induction heating body capable of measuring and feeding back working temperature at a heating core position, the complexity and the volume of an aerosol generating device are not increased, and meanwhile, the heating body 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 body for electromagnetic induction heating of an aerosol generating device, the electromagnetic induction heating body comprising a first body and a second body, the first body and the second body being assembled in opposite directions along a direction perpendicular to a circumferential line of the heating body to form the electromagnetic induction heating body, the first body and the second body having joint surfaces that are joined to each other when installed in opposite directions, the joint surface of at least one of the first body and the second body having a groove structure; the first main body comprises a limiting part, and the second main body is provided with a limiting groove which is jointed with the limiting part so as to limit the relative movement of the first main body and the second main body.

Further, a temperature sensor is arranged in the electromagnetic induction heating body.

Further, the temperature sensor is mounted in a groove structure in the joint face of the first body and/or the second body.

Further, the groove structure includes a sensor groove and a wire groove.

Further, the temperature sensor includes a temperature sensor head and a temperature sensor wire.

Further, the sensor slot is configured to receive a temperature sensor head.

Further, the wire groove is configured to receive a temperature sensor wire.

Further, the sensor slot has a lateral width greater than a lateral width of the wire slot.

Further, the sensor groove has a groove depth greater than that of the wire groove.

Further, the groove depth of the sensor groove is equal to or smaller than the thickness of the sensor head.

Further, when the first body and the second body are assembled together, the limit groove cooperates with the limit portion, so that the relative assembly position of the first body and the second body in the thickness direction can be defined.

Further, the first body includes a first accommodating body.

Further, the limit part is positioned at the end part of the first accommodating body.

Further, the width of the limiting portion is not greater than the width of the first accommodating body.

Further, the side portion of the first receiving body includes a first boss.

Further, the first boss is provided on the joint surface side of the first accommodation body.

Further, the side portion of the second receiving body includes a second boss.

Further, the second boss is provided at one side of the joint surface of the second accommodation body.

Further, the second boss laterally abuts against the first boss.

Further, a laterally opposite fitting position of the first body and the second body can thereby be defined.

Further, the electromagnetic induction heating body further comprises a locking part.

Further, the first body and the second body are fastened together by the locking portion after the assembly is completed.

Further, the locking portion includes a collar structure.

Further, the lantern ring structure is sleeved on the peripheries of the first main body and the second main body and is in interference fit with the first main body and the second main body to realize locking.

Further, the locking portion includes a first fixing member and a second fixing member.

Further, the first fixing member and the second fixing member are installed to face each other.

Further, the assembled heating body is clamped to realize fastening.

Further, at least one of the first body and the second body includes a base slot.

Further, the base slot can define movement of at least one of the first and second fixtures.

Further, the first fixing member includes a fixing bump in an orientation toward the first body.

Further, the first body includes a recess.

Further, the fixing projection is provided so as to be able to extend into the recess when the first fixing member is assembled.

Further, the first fixing member inner wall includes a base fixing groove.

Further, the second fastener side includes a raised edge.

Further, when the first fixing piece and the second fixing piece are assembled, the protruding edge and the base fixing groove can be in clamping fit, and therefore the first main body and the second main body can be fastened.

An induction heating system comprises any one of the electromagnetic induction heating bodies and an electromagnetic induction coil, wherein the electromagnetic induction heating body is placed in a changing magnetic field generated by the electromagnetic induction coil and used for induction heating.

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

Preferably, the locking part in all the above embodiments is made of a high temperature resistant nonmetal or a metal with smaller magnetic permeability, for example:

(1)PEEK；

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

(3) High temperature ceramics such as zirconia, alumina, and the like.

The above-described aerosol-generating device is for heating an aerosol-generating article, wherein the aerosol-generating article is a smoking article comprising an aerosol-forming substrate which, upon heating, generates an aerosol which is directly inhalable into a user's lungs through a 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 tobacco-free aerosol-forming material. For example, the aerosol-forming material may be a tablet comprising nicotine salt and an aerosol-forming agent.

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 sliver, a strip or a sheet containing one or more of herbal leaf, tobacco rib, flat tobacco and homogenized 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, an aerosol-former is used to describe any suitable known compound or mixture of compounds that, in use, promotes aerosol formation and is substantially resistant to thermal degradation at the operating temperature of the aerosol-generating article.

Suitable aerosol formers 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 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-formers.

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.

The aerosol-forming substrate comprising the homogenized tobacco sheet used in the aerosol-generating article may be manufactured by manufacturing processes known in the art, such as roll-pressing, thick-pulp and paper-making.

Aerosol-forming articles may have the appearance of conventional cigarettes, with smoking articles such as cigarettes and their specifications generally being named according to the length of the cigarette, as described below. The term "standard" generally means a cigarette having a length ranging from 68mm to 75mm, for example, from about 68mm to about 72mm, the term "short" or "mini" means a cigarette having a length of 68mm or less, the term "superscalar" generally means a cigarette having a length ranging from 75mm to 91mm, for example, from about 79mm to about 88mm, the term "long" or "lengthened" generally means a cigarette having a length ranging from 91mm to 105mm, for example, from about 94mm to about 101mm, and the term "ultralong" generally means a cigarette having a length ranging from about 110mm to about 121 mm. The smoking article is named according to the outer periphery of the cigarette, as described below. The term "standard" means a cigarette having an outer periphery of about 23mm to 25mm, the term "thick" means a cigarette having an outer periphery of 25mm or more, the term "thin" means a cigarette having an outer periphery of about 22mm to 23mm, the term "slender" means a cigarette having an outer periphery of about 19mm to 22mm, the term "ultra-fine" means a cigarette having an outer periphery of about 16mm to 19mm, and the term "fine" means a cigarette having an outer periphery of about 16mm or less. Thus, an oversized and ultrafine cigarette has a length of, for example, about 83mm and an outer circumference of about 17 mm. Standard, out-of-standard cigarettes, i.e. cigarettes having a length of 75mm to 91mm and a circumference of 23mm to 25mm, are favored by many customers. Cigarette articles of various sizes may also be manufactured with filters of different lengths. In general, short filters are used for cigarette articles of a standard that are short in both length and circumference. Typically, filter lengths range from 15mm for use with "short" and "standard" gauge cigarette articles to 30mm for use with "ultra-long" and "ultra-fine" gauge cigarette articles. The length of tipping paper in the length direction of the filter-tipped cigarette article is longer than the filter by, for example, 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 having an outer diameter of between about 5mm and about 12mm, for example between about 5mm and about 10mm or between about 6mm and about 8 mm. In a preferred embodiment, having 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; curled papers such as curled heat resistant papers or curled parchment papers; 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, e.g. 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 a mouthpiece 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 millimeters per millimeter 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 air passing 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 material that has undergone 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 undergone 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 concentrated sheet of material selected from the group consisting of: metal foil, polymeric material, and substantially non-porous paper or paperboard. In some embodiments, the aerosol-cooling element may comprise an aggregated sheet of 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 an aggregated sheet of biodegradable material. For example, an aggregate sheet of nonporous paper or an aggregate sheet of biodegradable polymeric material (e.g., polylactic acid).

The aerosol-cooling element may be formed from a material having a specific surface area of between about 10 square millimeters per milligram and about 100 square millimeters per milligram weightThe accumulated material is formed into an aggregated sheet. In some embodiments, the aerosol-cooling element may be formed of a material having a thickness of about 35mm ² An aggregated sheet of material of specific surface area/mg is 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 the aerosol-cooling element and immediately adjacent 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.

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

The heating mode of the smoking set can use the principle of resistance heating, and also can use 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 preferable use scene of the invention. The magnetic induction heating includes an induction coil and an electromagnetic induction heating body, which is generally called a susceptor, and the induction coil is generally called an inductor. The electromagnetic induction heating body as a part of the heater may be provided on the aerosol-generating device or may be provided in the aerosol-generating article. The heater is preferably needle-shaped, bar-shaped, leaf-shaped or tube-shaped.

In this patent, an electromagnetic induction heating system is used for the aerosol generating device.

The electromagnetic induction heating body is made of a material capable of converting electromagnetic energy into heat energy. When located in the fluctuating electromagnetic field, eddy currents induced in the electromagnetic induction heating body cause heating of the electromagnetic induction heating body. When the elongated 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 body.

The aerosol-generating article is designed to be engaged with an electrically operated aerosol-generating device comprising an inductively heated source. An inductive heating source or inductor generates a fluctuating electromagnetic field to heat 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 length dimension of the susceptor is greater than its width dimension or its thickness dimension, for example greater than twice its width dimension or its thickness dimension. The susceptor may thus 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 elongated susceptor may be located in a radially central portion within the aerosol-generating substrate and extend along the longitudinal axis of the aerosol-generating substrate.

The susceptor may be made of any material which can be heated inductively to a temperature sufficient for the aerosol-forming substrate to generate an aerosol. Preferred susceptors comprise metal or carbon. Preferred susceptors may include ferromagnetic materials such as ferrite, ferromagnetic steel or stainless steel. Suitable susceptors may be or may include aluminum. Preferred susceptors may be made of 400 series stainless steel, such as grade 410, grade 420 or grade 430 stainless steel. When placed in an electromagnetic field having similar frequency and field strength values, different materials will consume different amounts of energy. 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 expenditure.

It is possible to heat the preferred sensor to a temperature exceeding 250 degrees celsius. Suitable susceptors may include a nonmetallic core with a metal layer disposed on the nonmetallic core, such as a metal trace formed on a surface of a ceramic core.

The susceptor may have an outer protective layer, such as a ceramic or glass protective layer that encapsulates the elongated susceptor, thereby forming a complete heating body. The susceptor may include a protective coating formed of glass, ceramic, or an 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 the 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 an induction coil of an induction transmitter. The induction coil material is selected from materials with good conductive effect such as metal and the like; in addition, in this patent, the induction coil material should also have good elastic deformability, and spring steel, gold, silver, and other metals can be used.

The aerosol-generating device is a portable or handheld aerosol-generating device that a user may 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 source of the aerosol-generating device may be any suitable power source, for example a direct 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:

on the premise of not increasing the complexity and the volume of the heating smoking set, the shape and the structure of the heating component for induction heating are designed, and the temperature sensor is packaged into the electromagnetic induction heating body, so that the working temperature can be measured and fed back at the heating core position, the independence and the accuracy of the heating temperature monitoring are ensured, the aerosol generating device is more stable to heat, and the working performance is improved; the size, shape and arrangement of the heating component are more beneficial to the insertion of disordered tobacco cigarettes compared with the prior art; the locking part provides a firm, stable and simple fixing structure for the temperature sensor and the sensor;

in summary, the invention provides an aerosol generating device which is convenient to operate, low in cost, sensitive in temperature control, simple in structure, excellent in fuming effect and small in volume.

Drawings

The foregoing aspects of the invention and the following detailed description will be better understood when read in conjunction with the accompanying drawings. It should be noted that the drawings are only examples of the claimed technical solutions. In the drawings, like reference numbers indicate identical or similar elements.

Fig. 1 is a front view of a first body in embodiment 1;

fig. 2 is a perspective view of the first body in embodiment 1;

fig. 3 is a rear perspective view of embodiment 1 on a first body;

FIG. 4 is a top view of the first body of example 1;

fig. 5 is a perspective view of the second body in embodiment 1;

fig. 6 is a front view of the second body in embodiment 1;

fig. 7 is a front view of the assembled heating body of example 1;

fig. 8 is a side view of the assembled heating body of example 1;

fig. 9 is a bottom view of the assembled heating body of example 1;

fig. 10 is a top view of the assembled heating body of example 1;

fig. 11 is a perspective view of the locking portion in embodiment 1;

FIG. 12 is a front view of a temperature sensor;

FIG. 13 is an exploded view of the heating element in example 2;

fig. 14 is a perspective view of the first body in embodiment 2;

fig. 15 is a perspective view of the back surface of the first body in embodiment 2;

fig. 16 is a perspective view of the second body in embodiment 2;

fig. 17 is a perspective view of the first locking member of embodiment 2;

fig. 18 is a perspective view of the second locking member of embodiment 2;

fig. 19 is a perspective view of the assembled heating body of example 2;

fig. 20 is a front view of the assembled heating body of example 2;

fig. 21 is a side view of the assembled heating body of example 2.

Wherein reference numerals are as follows:

a heating body 100;2100

A first body 110;2110

A sensor groove 111;2111

A wire groove 112;2112

Notch 2117

First locking member 113

A stopper 114;2118

First boss 115

First accommodation body 116

A second body 120;2120

A tip 121;

the second accommodating body 122

Second locking member 123

A limit groove 124;2122

Second boss 125

Base groove 2126

Temperature sensor 200

Temperature sensor head 210

Temperature sensor wire 220

A locking part 300;2300

First fixing member 2310

Fixing bump 2311

Base fixing groove 2312

Second fixing piece 2320

Raised edge 2321

Detailed Description

The detailed features and advantages of the present invention will be readily apparent to those skilled in the art from that description, claims, and drawings.

For ease of understanding, the terms of azimuth such as "upper", "lower", "top", "bottom", etc. used in this specification refer to the standing state of the electromagnetic induction heating body with the tip end being referred to above, the "lateral" refers to the direction in which the two opposite sides of the electromagnetic induction heating body having a larger width in the standing state face each other, the "width" refers to the dimension in this direction, the "thickness" and the "depth" refer to the dimension in the direction in which the two opposite sides of the electromagnetic induction heating body having a smaller width in the standing state face each other, and the "inner" and the "outer" refer to the joining surfaces of the first body and the second body facing each other, facing away from each other.

Fig. 1 to 12 show embodiment 1 of the present invention, referring to fig. 1 to 4, which is a structure of a first body 110 in embodiment 1, as shown in the drawing, the first body 110 has a generally flat structure, and includes a first accommodating body 116, a sensor slot 111, a wire slot 112, a first locking member 113, a limiting portion 114 and a first boss 115. The sensor groove 111 and the wire groove 112 are formed by a groove structure in the first housing body 116, and the sensor groove 111 and the wire groove 112 communicate and communicate up to the bottom side of the first locking member 113. The limiting part 114 is located above the first accommodating body 116, the width of the limiting part 114 is smaller than that of the first accommodating body 116, the first boss 115 covers one side of the first accommodating body 116, the first locking member 113 is located below the first accommodating body 116, and the width of the first locking member 113 is also smaller than that of the first accommodating body 116. As a variant, the width of the limiting portion 114 may also be equal to the width of the first receiving body 116. The lateral width of the sensor groove 111 is larger than the lateral width of the wire groove 112, and the groove depth of the sensor groove 111 is larger than the groove depth of the wire groove 112.

Fig. 12 shows a structure of a temperature sensor 200 according to the present invention, specifically, the temperature sensor 200 may be a ready-packaged temperature sensor in the market, and more commonly, a PT1000 is used, and a temperature sensor head 210 is disposed above the temperature sensor 200, and a temperature sensor wire 220 is disposed below the temperature sensor head. The sensor slot 111 is adapted to receive the sensor head 210 and the wire slot 112 is adapted to receive the sensor wire 220. In this way, the temperature sensor 200 may be disposed in the first receiving body 116 of the first body 110, and the sensor wire 220 may protrude from the first body 110.

And it is easy to understand that since the lateral width of the sensor groove 111 is greater than that of the wire groove 112, the groove depth of the sensor groove 111 is greater than that of the wire groove 112, and the sensor 200 is not dropped out of the heating body in an upright state when it is put into the groove portion of the heating body.

Fig. 5-6 show the structure of the second body 120 in embodiment 1, where the second body 120 has a generally flat structure including a tip 121, a second accommodating body 122, a second locking member 123, a limiting groove 124, and a second boss 125. The tip 121 is located above the second accommodating body 122, and the tip 121 is provided with a sharp structure at the uppermost part to facilitate the insertion of the aerosol-generating substance, and the tip 121 extends downward in a cantilever manner to form a limiting groove 124 with the second accommodating body 122, and the limiting groove 124 is laterally open on one side and closed on the other side. It will be appreciated that if the width of the limiting portion 114 is equal to the width of the first receiving body 116, the limiting groove 124 may be laterally open at both sides in order to be engaged with the limiting portion 114. The second locking member 123 is located below the second accommodating body 122, and the width of the second locking member 123 is smaller than the width of the second accommodating body 122. The second boss 125 covers one side of the second receiving body 122 in the lateral direction.

In embodiment 1, the thickness of the sensor groove 111 is equal to or slightly smaller than the thickness of the sensor head 210, and it is understood that the sensor head 210 is disposed in the sensor groove 111, and the sensor head 210 can be closely attached to the second body 120 when the first body 110 and the second body 120 are assembled to each other. The first boss 115 and the second boss 125 have the same thickness for restricting the lateral relative positions of the first body 110 and the second body 120, and at the same time, since the first boss 115 covers one side of the first receiving body 116, the thickness of the side region is increased, enhancing the mechanical strength of the first body 110.

Specifically, referring to the bottom view of fig. 4, the thick side (left side in the drawing) may be 1.0mm thick, and the thin side (left side in the drawing) may be 0.6mm thick. Similarly, since the second boss 125 covers one side of the second receiving body 122, the thickness of the side region is increased, enhancing the mechanical strength of the second body 120. Specifically, the thickness of the second receiving body 122 may be 0.2mm, and the thickness of the second boss 125 may be 0.4mm.

As a variation of embodiment 1, the groove structure may be formed in the second body 120, and the temperature sensor 200 is disposed in the second body 120, in which case, only the thicknesses of the first body 110 and the second body 120 need be adjusted accordingly. As another variation, the first body 110 and the second body 120 may have both groove structures that together form a groove for receiving the temperature sensor 200 when the first body 110 and the second body 120 are assembled together.

Fig. 7 to 10 are structural views of the assembled heating body 100 of example 1, and it can be understood that since the thickness of the thick side of the first body 110 is 1.0mm, the thickness of the thin side is 0.6mm, and the height difference is 0.4mm. And the thickness of the second boss 125 is 0.4mm. Also, the cross-sectional shapes of the first boss 115 and the second boss 125 at the fitting joint surface are complementary, so that the outer surface of the heating body 100 formed after the first body 110 and the second body 120 are fitted to each other is regular and continuous. Specifically, the width of the locking part 300 engaged with the first locking member 113 and the second locking member 123 can be equal to the width of the engaged heating body 100.

Fig. 11 shows a specific structure of the locking portion 300 in embodiment 1. The locking part 300 is provided in a ring-shaped structure, and fastening is achieved by interference fit with the first locking member 113 and the second locking member 123.

Fig. 12 to 21 show embodiment 2 of the present invention, and fig. 14 and 15 show a specific structure of the first body 2110 in embodiment 2. The sensor slot 2111 and the wire slot 2112 are located within the cavity of the first body 2110, the sensor slot 2111 being for receiving the temperature sensor head 210, the sensor slot 2111 having a depth equal to or slightly greater than the temperature sensor 210, the wire slot 2112 being for receiving the temperature sensor wire 220. A recess 2117 is included in the wire channel 2112, and the recess 2117 may be a through hole or a counter bore, and the recess 2117 is configured to receive the fixing protrusion 2311 of the fixing element 2300 to achieve fixing. Specifically, the position of notch 2117 is set at a position where interference with temperature sensor wire 220 does not occur. The outer wall of the first body 2110 includes a stop portion 2118 for mating with the second body 2120.

Referring to fig. 16, a specific structure of a second body 2120 in embodiment 2 is shown. The cavity inside the second body 2120 accommodates the first body 2110 exactly and the inner wall includes a limit groove 2122 that mates with the limit portion 2118, the limit portion 2118 interacting with the limit groove 2122 to limit relative movement of the first body 2110 and the second body 2120 in the thickness direction when the first body 2110 and the second body 2120 are mated with each other. Specifically, in this embodiment, the first body 2110 is integrally formed as a regular flat sheet structure, and the cavity of the second body 2120 is exactly complementary to the shape of the first body 2110, and is shaped like a sword after the two are assembled. It can be appreciated that the outer surface of the heating body 2100 formed after the first body 2110 is inserted into the second body 2120 from the lower opening is regular and continuous. The continuous structure makes the heating member easier to insert into cigarettes.

Referring to fig. 17 and 18, in embodiment 2, the locking portion 2300 is configured such that the first fixing member 2310 and the second fixing member 2320 are mounted to each other in the embodiment 2.

The orientation of the first fixing member 2310 toward the first body 2110 includes a fixing protrusion 2311 and both sides of the inner wall include a base fixing groove 2312, and the fixing protrusion 2311 is just protruded into the recess 2117 when the first fixing member 2310 is mounted. Referring to fig. 18, in a specific structure of the second fixing member 2320, a side edge of the second fixing member 2320 includes a protruding edge 2321, and the protruding edge 2321 can be engaged with the base fixing groove 2312 to achieve fastening of the heating body 2100.

Specifically, the second body 2120 includes seating grooves 2126 at both sides for catching the fixing member 2300, limiting the degree of freedom of the assembled heating body 2100 and fixing member 2300 in the up-down direction.

Further, in embodiment 1, the locking part 300 may be replaced by the locking part 2300, and corresponding structures may be provided on the first body 110 and/or the second body 120 to lock the first body 110 and the second body 120. Accordingly, the locking part 300 may also be used in embodiment 2 to lock the first body 2110 and the second body 2120.

Specifically, the locking portion in all the embodiments described above is made of a non-metal with high temperature resistance or a metal with low magnetic permeability, for example:

(1)PEEK；

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

(3) High temperature ceramics such as zirconia, alumina, and the like.

The electromagnetic induction heating body described above can be advantageously used in an electromagnetic induction heating system including an electromagnetic induction coil, the electromagnetic induction heating body being placed in a varying magnetic field generated by the electromagnetic induction coil for induction heating. Also, the electromagnetic induction heating system may be advantageously used in aerosol-generating devices, for example aerosol-generating devices for use with smoking articles.

According to the electromagnetic induction heating body, on the premise that the complexity and the volume of the heating smoking set are not increased, the shape and the structure of the heating component for induction heating are designed, and the temperature sensor is packaged into the electromagnetic induction heating body, so that the working temperature can be measured and fed back at the heating core position, the independence and the accuracy of heating temperature monitoring are ensured, the aerosol generating device is more stable to heat, and the working performance is effectively improved; the size, shape and arrangement of the heating component are more beneficial to the insertion of disordered tobacco cigarettes compared with the prior art; the locking portion provides a firm, stable and simple fixing structure for the temperature sensor and the inductor.

In summary, the invention discloses an electromagnetic induction heating body and a system thereof, which are convenient to operate, low in cost, accurate in temperature measurement, sensitive in temperature control, simple in structure, excellent in fuming effect and small in volume.

The terms and expressions which have been employed herein are used as terms of description and not of limitation. The use of these terms and expressions is not meant to exclude any equivalents of the features shown and described (or portions thereof), and it is recognized that various modifications are possible and are intended to be included 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 while the present invention has been described with reference to the particular embodiments presently, it will be appreciated by those skilled in the art that the above embodiments are provided for illustration only and that various equivalent changes or substitutions may be made without departing from the spirit of the invention, and therefore, the changes and modifications to the above embodiments shall fall within the scope of the claims of the present invention as long as they are within the true spirit of the invention.

Claims (15)

1. An electromagnetic induction heating body for electromagnetic induction heating of an aerosol generating device is characterized in that,

the electromagnetic induction heating body comprises a first main body (110,2110) and a second main body (120,2120), the first main body (110,2110) and the second main body (120,2120) are assembled in a direction perpendicular to the circumferential line of the heating body to form the electromagnetic induction heating body, the first main body and the second main body are provided with joint surfaces which are jointed with each other when being installed in a opposite direction, and the joint surface of at least one of the first main body and the second main body contains a groove structure;

the first body (110,2110) includes a limit portion (114,2118), the second body (120; 2120) is provided with a limit groove (124,2112), and the limit groove (124, 2112) engages the limit portion (114,2118) to limit relative movement of the first body (110,2110) and the second body (120,2120).

2. Electromagnetic-induction-heating body according to claim 1, characterized in that the electromagnetic-induction-heating body is internally equipped with a temperature sensor (200), said temperature sensor (200) being mounted in said groove structure in the joining face of the first body (110,2110) and/or of the second body (120,2120).

3. Electromagnetic-induction-heating body according to claim 2, characterized in that the groove structure comprises a sensor groove (111,2111) and a wire groove (112,2112), the temperature sensor (200) comprising a temperature sensor head (210) and a temperature sensor wire (220), the sensor groove (111,2111) being configured to accommodate the temperature sensor head (210), the wire groove (112,2112) being configured to accommodate the temperature sensor wire (220); the lateral width of the sensor groove is larger than that of the wire groove, and the groove depth of the sensor groove is larger than that of the wire groove.

4. An electromagnetic-induction-heating body as claimed in claim 3, wherein the sensor groove has a groove depth equal to or less than the thickness of the sensor head (210).

5. Electromagnetic-induction heating body according to any one of claims 1-4, characterized in that the limit groove (124,2112) cooperates with the limit portion (114,2118) when the first body (110,2110) and the second body (120,2120) are assembled together, so that the relative assembly position of the first body and the second body in the thickness direction can be defined.

6. Electromagnetic-induction-heating body according to claim 5, characterized in that said first body comprises a first containing body (116), said limit portion (114) being located at an end of said first containing body (116); the width of the limiting part (114) is not larger than the width of the first accommodating body (116).

7. Electromagnetic-induction-heater according to claim 6, characterized in that the side of the first containing body (116) comprises a first boss (115), said first boss (115) being provided on one side of the junction surface of the first containing body (116);

the side part of the second accommodating body (122) comprises a second boss (125), and the second boss (125) is arranged on one side of the joint surface of the second accommodating body (122);

the second boss (125) laterally abuts the first boss (115) so as to be able to define a relative assembly position of the first body and the second body laterally.

8. Electromagnetic-induction-heating body according to any one of claims 1 to 7, characterized in that it further comprises a locking portion by which the first body and the second body are fastened together after assembly.

9. The electromagnetic-induction heating body according to claim 8, wherein the locking portion comprises a collar structure that is sleeved on the peripheries of the first body and the second body and is in interference fit with the first body and the second body to achieve locking.

10. Electromagnetic-induction heating body according to claim 8, characterized in that said locking portion comprises a first fixing element and a second fixing element, said first fixing element (2310) being mounted opposite to said second fixing element (2320) for clamping and tightening the assembled heating body.

11. Electromagnetic-induction heating body according to claim 10, characterized in that at least one of the first and second bodies comprises a seating groove able to define the movement of at least one of the first and second securing members.

12. Electromagnetic-induction-heating body according to claim 10 or 11, characterized in that the first fixing element (2310) comprises a fixing protrusion (2311) oriented towards the first body, said first body comprising a recess (2117), said fixing protrusion (2311) being arranged to extend into said recess (2117) when the first fixing element (2310) is assembled.

13. Electromagnetic-induction heating body according to any one of claims 10 or 11, characterized in that the inner wall of the first fixing member (2310) comprises a base fixing groove (2312), the side edge of the second fixing member (2320) comprises a protruding edge (2321), and when the first fixing member (2310) is assembled with the second fixing member (2320), the protruding edge (2321) and the base fixing groove (2312) can be in clamping fit, so that the fastening of the first body and the second body is achieved.

14. An electromagnetic induction heating system comprising the electromagnetic induction heating body as claimed in any one of claims 1 to 13, further comprising an electromagnetic induction coil, said electromagnetic induction heating body being disposed in a varying magnetic field generated by said electromagnetic induction coil for induction heating.

15. An aerosol-generating device comprising the electromagnetic induction heating system of claim 14, further comprising a housing, a power source, and a control circuit.