CN219182831U - Heating element and aerosol generating device - Google Patents

Abstract

The application relates to a heating element and aerosol generating device, include: a heating body for heating the aerosol-generating article to cause the aerosol-generating article to generate an aerosol; and a conductive line including a first wire and a second wire connected to opposite ends of the heating body, respectively, the conductive line configured to supply electric power required for heating the heating body, the first wire having a resistivity greater than that of the second wire, and a loop including the first wire and the second wire configured to have a potential difference associated with a temperature gradient when the opposite ends thereof have the temperature gradient; the total conductive resistance of the conductive circuit when the conductive circuit provides power for the heating body is R1, the resistance of the heating body is R2, and the conductive circuit is configured that the total conductive resistance R1 is reduced so that R2/(R1+R2) is more than or equal to 0.7.

Description

Heating element and aerosol generating device

Technical Field

The embodiment of the application relates to the technical field of aerosol generation, in particular to a heating component and an aerosol generation device.

Background

Aerosol generating devices are used to heat smoking articles such as cigarettes, cigars, etc. so that the smoking articles produce aerosols without burning.

The aerosol-generating device includes a heating body, a power source, and a lead through which the power source provides power to the heating body to cause the heating body to heat the smoking article to generate aerosol. The aerosol generating device further comprises a temperature measuring assembly and a controller, wherein the temperature measuring assembly is used for detecting the temperature of the heating body, and the controller is used for controlling the power output by the power supply to the heating body according to the temperature of the heating body, so that a user obtains the best taste.

Disclosure of Invention

Embodiments of the present application provide a heating assembly, comprising:

a heating body for heating the aerosol-generating article to cause the aerosol-generating article to generate an aerosol; and

a conductive line including a first wire and a second wire connected to opposite ends of the heating body, respectively, the conductive line configured to supply electric power required for heating the heating body, the first wire having a resistivity greater than that of the second wire, and a loop including the first wire and the second wire configured to have a potential difference associated with a temperature gradient when the opposite ends thereof have the temperature gradient;

the total conductive resistance of the conductive circuit when the conductive circuit provides power for the heating body is R1, the resistance of the heating body is R2, and the conductive circuit is configured that the total conductive resistance R1 is reduced so that R2/(R1+R2) is more than or equal to 0.7.

The embodiment of the application provides an aerosol generating device, which comprises a heating component and a power component, wherein the power component is connected with a first wire and a second wire;

wherein the power supply assembly is configured to supply the heating body with electric power for heating through the conductive line, while the power supply assembly is configured to acquire a potential difference of a loop including the first wire and the second wire, and the power supply assembly supplies the electric power and acquires the potential difference are not performed simultaneously.

The heating assembly and the aerosol generating device can provide power for heating the heating body through the conductive circuit, and the loop comprising the first wire and the second wire has potential difference associated with the temperature gradient when the two opposite ends of the loop have the temperature gradient, so that the heating body can be provided with the power for heating through the conductive circuit, and the temperature of the heating body can be represented or the power input level to the heating body can be controlled through the potential difference of the loop comprising the first wire and the second wire. The total conductive resistance of the conductive circuit when the conductive circuit provides power for the heating body is R1, the resistance of the heating body is R2, the conductive circuit is configured that the total conductive resistance R1 is reduced so that R2/(R1+R2) is more than or equal to 0.7, namely the resistance ratio of the conductive circuit in the heating component when the heating body heats is reduced, the power consumption of the heating component and the aerosol generating device is reduced, and the ineffective power of the heating component and the aerosol generating device is reduced.

Drawings

One or more embodiments are illustrated by way of example and not limitation in the figures of the accompanying drawings, in which like references indicate similar elements, and in which the figures of the drawings are not to be taken in a limiting sense, unless otherwise indicated.

FIG. 1 is a schematic diagram of an aerosol-generating device according to an embodiment of the present disclosure;

FIG. 2 is a schematic cross-sectional view of a first wire and a second wire according to one embodiment of the present application;

FIG. 3 is a schematic cross-sectional view of a first wire and a second wire provided in another embodiment of the present application;

FIG. 4 is a schematic diagram of a heating element according to an embodiment of the present disclosure, wherein the first and second wires each have a trace conductor lead;

FIG. 5 is a schematic diagram of a heating element provided in an embodiment of the present application having a companion conductor lead for one of the first and second wires;

FIG. 6 is a schematic diagram of a heating assembly provided in another embodiment of the present application having one of the first and second wires with a companion conductor lead;

FIG. 7 is a schematic diagram of a heating element according to an embodiment of the present disclosure with both the first and second wires thickened;

FIG. 8 is a schematic diagram of one of the first and second wires in the heating assembly according to one embodiment of the present application;

FIG. 9 is a schematic diagram of a heating assembly provided in another embodiment of the present application with one of the first and second wires thickened;

in the figure:

1. an aerosol-generating article; 11. an aerosol matrix;

2. a heating assembly; 21. a heating body;

3. a power supply assembly; 31. a power supply; 32. a control circuit;

4. a housing;

5. a conductive line; 51. a first wire; 52. a second wire; 53. a good conductor film layer; 54. and (5) a good conductor lead.

Detailed Description

The following description of the technical solutions in the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.

The terms "first," "second," "third," and the like in this application are used for descriptive purposes only and are not to be construed as indicating or implying any particular order or quantity of features in relation to importance or otherwise indicated. All directional indications (such as up, down, left, right, front, back … …) in the embodiments of the present application are merely used to explain the relative positional relationship or movement between the components under a certain specific posture (as shown in the drawings), and if the specific posture is changed, the directional indication is correspondingly changed. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those listed steps or elements but may include other steps or elements not listed or inherent to such process, method, article, or apparatus.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the present application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.

It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or one or more intervening elements may also be present therebetween. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.

Referring to fig. 1, an embodiment of the present application provides an aerosol-generating device that may be used to heat an aerosol-generating article 1 to volatilize aerosol from the aerosol-generating article 1 for inhalation.

As used herein, the term "aerosol-generating article" refers to an article comprising an aerosol-forming substrate that upon heating releases volatile compounds that can form an aerosol. By "aerosol-generating article" is meant an article comprising an aerosol-forming substrate intended to be heated rather than burned to release volatile compounds that can form an aerosol. An aerosol formed by heating an aerosol-forming substrate may contain fewer known hazardous components than an aerosol produced by combustion or pyrolysis degradation of the aerosol-forming substrate. In an embodiment, the aerosol-generating article is removably coupled to the aerosol-generating device. The article may be disposable or reusable.

The aerosol-forming substrate may be a solid aerosol-forming substrate. Alternatively, the aerosol-forming substrate may comprise solid and liquid components. The aerosol-forming substrate may comprise tobacco. The aerosol-forming substrate may comprise a tobacco-containing material containing volatile tobacco flavour compounds that are released from the substrate upon heating. The aerosol-forming substrate may comprise a non-tobacco material. The aerosol-forming substrate may comprise tobacco-containing material and no tobacco-containing material.

The outer diameter of the aerosol-generating article may be between about 5mm and about 12 mm, for example between about 5.5 mm and about 8mm. In one embodiment, the aerosol-generating article has an outer diameter of 6 millimeters +/-10%.

The total length of the aerosol-generating article 1 may be between about 25mm and about 100 mm. The total length of the aerosol-generating article may be between about 30mm and about 100 mm. In one embodiment, the total length of the aerosol-forming substrate comprises about 1/2 of the total length of the aerosol-generating article 1. In another embodiment, the total length of the aerosol-generating article 1 is about 45mm. In yet another embodiment, the total length of the aerosol-forming substrate 11 is about 33mm.

As used herein, the term "aerosol-generating device" is a device that interfaces or interacts with an aerosol-generating article to form an inhalable aerosol. The device interacts with the aerosol-forming substrate to generate an aerosol. An electrically operated aerosol-generating device is a device comprising one or more components for supplying energy from, for example, a power supply assembly to heat an aerosol-forming substrate to generate an aerosol.

The aerosol-generating device may be described as a heated aerosol-generating device, which is an aerosol-generating device comprising a heating assembly 2. The heating assembly 2 is for heating an aerosol-forming substrate 11 of the aerosol-generating article 1 to generate an aerosol.

Referring to fig. 1, the aerosol-generating device may comprise a power supply assembly 3 for supplying power to the heating assembly. The power supply assembly 3 may comprise any suitable power supply 31, for example a DC source, such as a battery. In one embodiment, the power source 31 is a lithium ion battery. Alternatively, the power source 31 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 power supply assembly 3 may include one or more control circuits 32, and the control circuits 32 may control the output of the power supply 31, for example, to cause the power supply 31 to output alternating current or direct current, or the like, or to cause the power supply 31 to output current or voltage, or the like, for example, in the form of pulses.

The control circuit 32 may have one or more controllers thereon. The controller may control the overall operation of the aerosol-generating device. In detail, the controller controls not only the operation of the power supply 31 and the heating assembly, but also the operation of other elements in the aerosol-generating device. Furthermore, the controller may determine whether the aerosol-generating device is operable by checking the status of the elements of the aerosol-generating device. The controller includes at least one processor. The processor may comprise an array of logic gates, or may comprise a combination of a general purpose microprocessor and a memory storing programs executable in the microprocessor. Furthermore, those skilled in the art will appreciate that the controller may include another type of hardware.

Referring to fig. 1, the aerosol generating device further includes a housing 4. The housing 4 has a receiving cavity therein for receiving at least part of the aerosol-generating article 1. The upper end of the receiving chamber is open for insertion of the aerosol-generating article 1 into the receiving chamber. The power supply assembly 3 and the heating assembly 2 are also accommodated in the housing 4. Wherein the heating assembly 2 may be an integral part of the aerosol-generating device.

The heating assembly 2 may comprise an external heater or an internal heater or an air heater, as used herein, the term "external heater" refers to a heater that is positioned outside the aerosol-generating article when the aerosol-generating system comprising the aerosol-generating article is assembled. As used herein, the term "internal heater" refers to a heater that is positioned at least partially within an aerosol-generating article when the aerosol-generating system comprising the aerosol-generating article is assembled. As used herein, the term "air heater" refers to a heater for heating air in an air intake passage through which air enters an aerosol-generating article, the air heater heating air flowing through the air intake passage to high temperature air which then enters the aerosol-generating article, exchanging heat with the aerosol-generating article, effecting heating and baking of the aerosol-generating article.

The heating assembly 2 has one or more, the one or more heating assemblies 2 being capable of reaching a temperature of between about 200 ℃ and 440 ℃ to enable the aerosol-generating article 1 to generate an aerosol.

The heating unit 2 includes a heating body 21 that can generate heat when energized.

In one embodiment, the heating body 21 comprises an infrared electrothermal coating formed on the surface of the tubular body or the insert. The infrared electrothermal coating can generate heat energy under the condition of electrification, and then generate infrared rays with certain wavelength, for example: far infrared rays of 8-15 μm. When the wavelength of the infrared light matches the absorption wavelength of the aerosol-forming substrate, the energy of the infrared light is readily absorbed by the aerosol-forming substrate. In the embodiment of the present application, the wavelength of the infrared ray is not limited, and may be an infrared ray of 0.75 μm to 1000 μm, and optionally a far infrared ray of 1.5 μm to 400 μm. The infrared electrothermal coating is optionally formed by uniformly stirring far infrared electrothermal ink, ceramic powder and inorganic adhesive, then coating on the outer surface of a matrix, and then drying and curing for a certain time, wherein the thickness of the infrared electrothermal coating is 30-50 mu m; of course, the infrared electrothermal coating can be coated on the outer surface of the substrate after being mixed and stirred by tin tetrachloride, tin oxide, antimony trichloride, titanium tetrachloride and anhydrous copper sulfate according to a certain proportion; or one of a silicon carbide ceramic layer, a carbon fiber composite layer, a zirconium titanium oxide ceramic layer, a zirconium titanium nitride ceramic layer, a zirconium titanium boride ceramic layer, a zirconium titanium carbide ceramic layer, an iron oxide ceramic layer, an iron nitride ceramic layer, an iron boride ceramic layer, an iron carbide ceramic layer, a rare earth oxide ceramic layer, a rare earth nitride ceramic layer, a rare earth boride ceramic layer, a rare earth carbide ceramic layer, a nickel cobalt oxide ceramic layer, a nickel cobalt nitride ceramic layer, a nickel cobalt boride ceramic layer, a nickel cobalt carbide ceramic layer, or a high silicon molecular sieve ceramic layer; the infrared electrothermal coating can also be an existing coating of other materials.

In one embodiment, the heating body 21 comprises a resistive material so that joule heat can be generated when energized. Suitable resistive materials include, but are not limited to: semiconductors such as doped ceramics, conductive ceramics (e.g., molybdenum disilicide), carbon, graphite, metals, metal alloys, and composites made of ceramic materials and metal materials. Such composite materials may include doped or undoped ceramics. Examples of suitable doped ceramics include doped silicon carbide. Examples of suitable metals include titanium, zirconium, tantalum, and platinum group metals. Examples of suitable metal alloys include stainless steel, constantan (Constantan), nickel-containing alloys, cobalt-containing alloys, chromium-containing alloys, aluminum-containing alloys, titanium-containing alloys, zirconium-containing alloys, hafnium-containing alloys, niobium-containing alloys, molybdenum-containing alloys, tantalum-containing alloys, tungsten-containing alloys, tin-containing alloys, gallium-containing alloys, manganese-containing alloys, and iron-containing alloys, as well as nickel-, iron-, cobalt-based superalloys, stainless steel, iron-aluminum-based alloys, and iron-manganese-aluminum-based alloys. In the composite material, the resistive material may be embedded in, encapsulated or coated by the insulating material, or vice versa, as desired, depending on the kinetics of energy transfer and the desired external physicochemical properties. The heating assembly may comprise a metal etched foil that acts as a barrier between two layers of inert material. In that case, the inert material may comprise full polyimide or mica foil, or the like.

In the embodiment shown in fig. 4-9, the heating body 21 comprises a spiral coil of heating wire, which may be a tubular structure extending in the longitudinal direction of the aerosol-generating article 1. In one example, the heating wire of the wound heating body is a flat wire, the cross section of which is substantially rectangular, the thickness of which may be between 0.03mm and 1.5mm, for example about 1mm, and the width of which may be between 2mm and 8mm, for example about 4mm or about 5mm. In one example, the heating wire of the wound heating body is a round wire, and the cross section of the round wire is approximately circular. In other embodiments, the heating body 21 may also comprise an etched mesh, a metal ring, or a resistive coating, among others.

The heating assembly 2 further comprises conductive lines 5, the conductive lines 5 being connected at opposite ends of the heating body 21, the heating body 21 taking electrical heat from the conductive lines 5, based on which the conductive lines 5 are electrically connected with the control circuit 32 in the power assembly 3. The conductive line 5 includes a first wire 51 and a second wire 52 connected to opposite ends of the heating body 21, respectively, the first wire 51 and the second wire 52 being made of different materials and having different resistivities, one end of the first wire 51 and one end of the second wire 52 being connected to the heating body 21, and the other end being connected to the control circuit 32 in the power supply unit 3, one end of the first wire 51 and the second wire 52 being connected to the heating body when the heating body 21 heats up being a hot end, and the other end being a cold end, relatively speaking, so that there is a temperature gradient between the hot end and the cold end when the heating body 21 heats up, and in a circuit including the first wire 51 and the second wire 52, the temperature gradient at opposite ends of the circuit being such that the circuit has a thermoelectric effect, the circuit being formed with a potential difference associated with the temperature gradient based on the thermoelectric effect.

The conductive line 5 is electrically connected to the power supply assembly 3, the control circuit 32 can control the power level output from the power supply 31 to the heating body 21 through the conductive line 5, and the control circuit 32 can identify, detect and acquire the corresponding potential difference formed by the loop including the first wire 51 and the second wire 52 due to the temperature gradient, so that the control circuit 32 can convert the temperature of the heating body 21 according to the potential difference and control the power input level to the heating body 21 according to the temperature or the potential difference to generate high-quality aerosol.

Wherein the acquisition of the potential difference by the control circuit 32 and the supply of the electric power by the control power source 31 to the heating body 21 through the conductive leads 5 are not performed simultaneously but are performed alternately. For example, the power supply assembly supplies a heating current or voltage to the heating body in the form of pulses, and the control circuit acquires the potential difference at the intervals of the pulses or when the supplied current or voltage is 0 ampere or 0 volt.

In some embodiments, the first and second wires 51 and 52 may be thermocouple wires of a type of K, J, N, or the like thermocouple.

Referring to fig. 4-9, one end of the first wire 51 is electrically connected to one end of the heating body 21, the other end of the first wire 51 is electrically connected to the power supply assembly 3, and similarly, one end of the second wire 52 is electrically connected to the other end of the heating body 21, and the other end of the second wire 52 is electrically connected to the power supply assembly 3. That is, the first wire 51, the heating element 21, and the second wire 52 are connected in series.

However, the material capable of generating a potential difference under a temperature gradient generally has a larger resistivity, and is therefore not a good conductor, and in a heating assembly including a first and a second heat conducting wires connected in series with a heating body, if the resistance of the first and second heat conducting wires is relatively high, the reactive power of the power supply assembly will be larger, and even if the loss of the aerosol generating device is larger, this will definitely shorten the standby time of the aerosol generating device and affect the user experience in the case that the power supplies have the same capacity. And if the resistance of the first wire and the second wire is relatively high, the current on the circuit board is overlarge, so that the loss is further increased, the temperature of the circuit board is relatively high, and the risk of damaging the electronic element is increased.

In this application, the conductive line having the first conductive line 51 and the second conductive line 52 has a lower resistance, and defines that the total conductive resistance of the conductive line 5 when providing power to the heating body 21 is R1, and the resistance of the heating body 21 is R2, then when the resistance of the heating body 21 is kept unchanged as R2, the total conductive resistance R1 is reduced to R2/(r1+r2) > 0.7 after the conductive line 5 is set.

In an embodiment, referring to fig. 2 and 3, the conductive trace 5 further includes a good conductor film 53, and the good conductor film 53 is provided to reduce the total conductive resistance R1 of the conductive trace 5 when providing power to the heating body 21. At least one surface of the first and second wires 51 and 52 has a good conductor film layer 53, and the good conductor film layer 53 has a resistivity smaller than that of the first and second wires 51 and 52 such that when a current flows therethrough, at least a part of the current flows in the good conductor film layer 53, and the good conductor film layer 53 may be made of one or more of good conductive metals such as copper, silver, or gold, and the good conductor film layer 53 may be formed on the first and/or second wires 51 and 52 by plating, spraying, or the like. The thickness of the good conductor film layer 53 may be greater than 1 μm, for example, the thickness of the good conductor film layer 53 may be between 3 and 5 μm, or for example, the thickness of the good conductor film layer 53 may be about 10 μm. After the conductive trace 5 includes the good conductor film layer 53, the conductive resistance is significantly reduced.

In an example, referring to fig. 3, the first conductive line 51 and the second conductive line 52 have different resistivities, and the good conductor film 53 is provided only on the surface of one of the first conductive line 51 and the second conductive line 52 having the larger resistivity, so that the conductive resistance of the conductive line 5 where the one of the first conductive line 51 and the second conductive line 52 having the larger resistivity is located can be reduced, and the total conductive resistance R1 of the conductive line can be reduced. For example, if the resistivity of the first wire 51 is greater than the resistivity of the second wire 52, the surface of the first wire 51 has a good conductor film 53, and the second wire 52 does not have a good conductor film 53, so that the conductive resistance of the conductive trace 5 where the first wire 51 is located can be reduced, and at the same time, the total conductive resistance R1 of the conductive trace can be reduced. By providing the good conductor film layer 53 only on the conductive line having a large resistivity, the amount of the material for forming the good conductor film layer 53, for example, silver, can be reduced, and the cost can be reduced.

Based on the conductive line 5 further comprising a good conductor film 53, in an example, referring to fig. 2, the surfaces of the first wire 51 and the second wire 52 each have a good conductor film 53. Taking the example that the surfaces of two thermocouple wires of the K-type thermocouple are provided with silver plating films, experiments are carried out, and corresponding experimental parameters and obtained experimental data are shown in the following table:

table 1K comparison of resistance values of silver plating on thermocouple surfaces

Defining the conductive line containing the first wire as a first line and the conductive line containing the second wire as a second line, wherein when the diameters of the first wire 51 and the second wire 52 are 0.3mm and the first line and the second line are 45mm, the total resistance of the first line and the second line is obviously lower than that of the first line and the second line when the surface is plated with silver; when the first line and the second line are 45mm and the diameters of the first wire 51 and the second wire 52 are 0.5mm, the resistances of the first line and the second line are reduced to 0.075 Ω and 0.038 Ω, respectively, after silver plating on the surfaces.

The surfaces of the first and second wires 51 and 52 may have different thicknesses of the good conductor film 53, and in one example, the resistivity of the first wire 51 is greater than the resistivity of the second wire 52, and the thickness of the good conductor film 53 on the surface of the first wire 51 is greater than the thickness of the good conductor film 53 on the surface of the second wire 52, and the resistance of the good conductor film 53 of the same length but a large thickness is small. Of course, the surfaces of the first and second wires 51 and 52 may have the good conductor film layer 53 of the same thickness.

In an example, the diameters of the first wire and the second wire are different, and increasing the diameter of the first wire and the second wire can reduce the resistance, and a good conductor film layer is provided only on the surface of one of the first wire and the second wire, which has a smaller diameter. For example, if the diameter of the first wire is smaller than that of the second wire, the surface of the first wire has a good conductor film layer, and the second wire does not have a good conductor film layer, so that the conductive resistance of the conductive line where the first wire is located can be reduced, and the total conductive resistance of the positive conductive line and the negative conductive line can be reduced at the same time.

In one embodiment, referring to fig. 4-6, the conductive trace 5 further includes a good conductor lead 54, and the provision of the good conductor lead 54 reduces the overall conductive resistance R1 of the conductive trace 5 when providing power to the heating body 21. At least one of the first wire 51 and the second wire 52 has a good conductor lead 54 associated therewith, specifically, the front and rear ends of the good conductor lead 54 are electrically connected to the front and rear ends of the wire associated therewith, so that current can pass mainly through the good conductor lead 54, and at the same time, since the front and rear ends of the good conductor lead 54 are electrically connected to the front and rear ends of the wire associated therewith, the conductive traces having the good conductor lead 54 and the corresponding wire need only be soldered once each when soldering with the heating body 21 and the power supply module 3, respectively, and since the front and rear ends of the good conductor lead 54 are electrically connected to the front and rear ends of the wire associated therewith, respectively, the good conductor lead 54 and the wire connected thereto from the front and rear form a whole, which is advantageous in preventing the traces from being confused.

Wherein the resistivity of the good conductor lead 54 is less than the resistivity of the first and second wires 51, 52, the good conductor lead 54 may be made of one or more of a good conductive metal such as copper, silver, or gold. The good conductor lead 54 has substantially the same function as the good conductor film 53 described above, and can reduce the conductive resistance of the positive conductive line and/or the negative conductive line.

Based on the conductive wire 5 further including two good conductor leads 54, in an example, referring to fig. 4, two good conductor leads 54 may be provided, where the first end and the second end of one good conductor lead 54 are electrically connected to the first end and the second end of the first wire 51, respectively, and the electrical connection may be soldering, and the first end and the second end of the other good conductor lead 54 are electrically connected to the first end and the second end of the second wire 52, respectively, and the electrical connection may also be soldering. In one example, referring to fig. 5 and 6, there may be one and only one of the good conductor leads 54, the first lead 51 and the second lead 52 having different resistivities, the only one good conductor lead 54 being accompanied by the one of the first lead 51 and the second lead 52 having the greater resistivity, thereby reducing the conductive resistance of the line where the one of the first lead 51 and the second lead 52 having the greater resistivity is located, while also reducing the total conductive resistance of the conductive line. In one example, there is only one good conductor lead, the diameters of the first wire and the second wire are different, increasing the diameters of the first wire and the second wire can reduce the resistance of the thermocouple wire, and the head end and the tail end of the only one good conductor lead are electrically connected with the head end and the tail end of the smaller diameter one of the first wire and the second wire. For example, if the diameter of the first wire is smaller than that of the second wire, the end-to-end ends of only one good conductor lead are electrically connected to the end-to-end ends of the first wire, so that the conductive resistance of the conductive line where the first wire is located can be reduced, and the total conductive resistance of the conductive line can be reduced.

In an embodiment, referring to fig. 8 and 9, the diameters of the first wire 51 and the second wire 52 included in the conductive line 5 are different, and increasing the diameter of the wire can reduce the resistance of the wire. Referring to table 1 above, when the length (45 mm) is the same, the surface treatment is the same, and the material is the same, the resistance of the wire having a large diameter is smaller. Therefore, the wire having a large resistivity among the first wire 51 and the second wire 52 can be thickened to reduce the resistance thereof; alternatively, the diameter of the wire having a large resistivity among the first wire 51 and the second wire 52 may be made larger than the diameter of the wire having a small resistivity. In this embodiment, the good conductor film layer 53 and the good conductor leads 54 may not be included in the conductive lines 5.

In an embodiment, referring to fig. 7, the diameters of the first and second wires 51 and 52 included in the conductive line 5 are the same, and based on table 1 above, the diameters of the first and second wires 51 and 52 may be increased at the same time, thereby simultaneously reducing the resistances of the first and second wires 51 and 52. In an example, the diameters of the first and second wires 51 and 52 are greater than 0.3mm, and the diameters of the first and second wires 51 and 52 are not suitable to be excessively large in consideration of the operation of bending the thermocouple wire to facilitate welding in practice, so that the diameters of the first and second wires 51 and 52 are not suitable to be more than 0.8mm, for example, the diameters of the first and second wires 51 and 52 may be about 0.5mm.

According to the calculation formula of the resistance: r=ρl/S, ρ represents the resistivity of the resistor, L represents the length of the resistor, and S represents the cross-sectional area of the resistor, and it is understood that the lengths of the first and second wires 51 and 52 also affect the thermal resistance.

In one embodiment, the length of the larger one of the first conductive line 51 and the second conductive line 52 is smaller than the length of the smaller one of the first conductive line and the second conductive line, so as to reduce the total conductive resistance of the conductive line circuit 5.

In one embodiment, the opposite ends of the heating body 21 are terminals electrically connected to the first and second wires 51 and 52, respectively, which are offset in the longitudinal direction of the aerosol-generating article 1 so that there is a longitudinal spacing between the terminals. The difference in length between the first wire 51 and the second wire 52 is not greater than the longitudinal spacing between the two terminals. For example, the connection between the first wire 51 and the second wire 52 and the control circuit 32 is at substantially the same longitudinal height, and if the connection between the first wire 51 and the second wire 52 and the heating body 21 is also at substantially the same longitudinal height, the first wire 51 and the second wire 52 have substantially the same length, and if the connection between the first wire 51 and the second wire 52 and the heating body 21 is at a different longitudinal height, the difference in length between the first wire 51 and the second wire 52 is not greater than the longitudinal distance between the two terminals, based on the economy principle.

On the premise that the connection points of the first wire 51 and the second wire 52 with the control circuit 32 are approximately at the same longitudinal height, one of the two terminals is located at the top end and the other terminal is located at the bottom end of the heating body and is the bottom end terminal, and the distance between the top end terminal and the control circuit 32 is larger than the distance between the bottom end terminal and the control circuit 32.

Based on this, in an embodiment, the resistivity of the first wire 51 is greater than the resistivity of the second wire 52, the first wire 51 is electrically connected to the top terminal of the heating body 21, the second wire 52 is electrically connected to the bottom terminal of the heating body 21, and the length of the first wire 51 may be greater than the length of the second wire 52. In one example, the surface of the first wire 51 has a good conductor film 53; in an example, referring to fig. 5, the first wire 51 is connected at the end-to-end with the end-to-end of the good conductor lead 54, so as to be concomitant with the good conductor lead 54; in one example, referring to fig. 8, the diameter of the first wire 51 is greater than the diameter of the second wire 52.

In an embodiment, the resistivity of the first wire 51 is greater than the resistivity of the second wire 52, the first wire 51 is electrically connected to the bottom terminal of the heating body 21, the second wire 52 is electrically connected to the top terminal of the heating body 21, and the length of the first wire 51 may be smaller than the length of the second wire 52. Based on this, in an example, the surface of the first wire 51 has a good conductor film layer 53; in an example, referring to fig. 5, the first wire 51 is connected at the end-to-end with the end-to-end of the good conductor lead 54, so as to be concomitant with the good conductor lead 54; in one example, referring to fig. 8, the diameter of the first wire 51 is greater than the diameter of the second wire 52.

In one embodiment, the length of the first wire is greater than the length of the second wire, while the diameter of the first wire is greater than the diameter of the second wire, regardless of the resistivity of the first wire and the second wire. In one embodiment, the difference between the resistance of the conductive line 5 including the first conductive line 51 and the resistance of the conductive line including the second conductive line 52 is less than 0.3 Ω. In an embodiment, the resistance of the first conductive line 51 is greater than the resistance of the second conductive line 52, the conductive resistance of the line including the first conductive line 51 in the conductive line 5 is not greater than 0.43 Ω, the conductive resistance of the line including the second conductive line 51 in the conductive line 5 is not greater than 0.13 Ω, and the total conductive resistance of the conductive line 5 is not greater than 0.6 Ω.

In an embodiment, taking the K-type thermocouple as an experimental object, the first wire 51 and the second wire 52 form two thermocouple wires of the K-type thermocouple, the resistance of the heating body 21 connected between the first wire 51 and the second wire 52 is about 1.1 Ω, the resistivity of the first wire 51 is greater than the resistivity of the second wire 52, one of the first wire 51 and the second wire 52 is connected with the top terminal of the heating body 21, and the other is connected with the bottom terminal of the heating body 21, so that the first wire 51 and the second wire 52 have different lengths; tests were performed based on this premise:

in one set of tests, the length of the first wire 51 was about 22mm (allowing for 1-2mm error), the length of the second wire 52 was about 31mm (allowing for 1-2mm error), and R2/(R1+R2) ≡ 0.743 where the diameters of both the first wire 51 and the second wire 52 were 0.3 mm.

In one set of tests, the length of the first wire 51 was about 22mm (allowing for 1-2mm error), the length of the second wire 52 was about 31mm (allowing for 1-2mm error), and the diameter of the first wire 51 was 0.5mm, and the diameter of the second wire 52 was 0.3mm, R2/(R1+R2). Apprxeq.0.786.

In one set of tests, the length of the first wire 51 was about 31mm (allowing for 1-2mm error), the length of the second wire 52 was about 22mm (allowing for 1-2mm error), and the diameter of the first wire 51 was 0.5mm, and the diameter of the second wire 52 was 0.3mm, R2/(R1+R2). Apprxeq.0.769.

In one set of tests, the length of the first wire 51 was about 22mm (allowing for 1-2mm error), the length of the second wire 52 was about 31mm (allowing for 1-2mm error), the diameter of the first wire 51 was 0.5mm, the diameter of the second wire 52 was 0.3mm, and R2/(R1+R2) ≡0.802 where the surface of the first wire 51 had a good conductor film 53.

In one set of tests, one of the first wire 51 and the second wire 52 has a length of about 22mm, the other wire has a length of about 31mm, and the diameters of the first wire 51 and the second wire 52 are each 0.5mm, and when the surfaces of the first wire 51 and the second wire 5 each have a good conductor film 53, R2/(R1+R2) ≡0.891.

In an embodiment, taking the K-type thermocouple as an experimental object, the first wire and the second wire form two thermocouple wires of the K-type thermocouple, and under the condition that the heating body reaches and maintains 350 ℃ and the total working time is 225S, the power consumption of a single heating cycle of the heating component is shown in table 2, wherein the resistivity of the first wire is greater than that of the second wire.

Table 2 results of different designs single cycle power consumption test

In one embodiment, the K-type, J-type and N-type thermocouples are used as subjects, and the resistance values of the thermocouples are compared with those shown in Table 3 under the condition of the same length:

TABLE 3 comparison of thermocouple resistances of different models

It can be seen that a thermocouple of an appropriate model can be selected to reduce the energy consumption of the heating assembly.

The heating assembly and the aerosol generating device can supply power for heating body heating by the conductive circuit, and the loop comprising the first wire and the second wire has potential difference associated with the temperature gradient when the loop has the temperature gradient, so that the heating body heating power can be supplied to the heating body by the conductive circuit, and the temperature of the heating body can be represented or the power input level to the heating body can be controlled by the potential difference of the loop comprising the first wire and the second wire. The total conductive resistance of the conductive circuit is reduced by adding a good conductor film layer, a good conductor lead wire, increasing the diameter of the lead wire or reducing the length of the lead wire with large resistivity, and the like, so that the resistance ratio of the conductive circuit in the heating component is reduced when the heating body heats, the power consumption of the heating component and the aerosol generating device is reduced, and the invalid power of the heating component and the aerosol generating device is reduced.

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

Claims (10)

1. A heating assembly, comprising:

a heating body for heating the aerosol-generating article to cause the aerosol-generating article to generate an aerosol; and

a conductive line including a first wire and a second wire connected to opposite ends of the heating body, respectively, the conductive line configured to supply electric power required for heating the heating body, the first wire having a resistivity greater than that of the second wire, and a loop including the first wire and the second wire configured to have a potential difference associated with a temperature gradient when the opposite ends thereof have the temperature gradient;

the total conductive resistance of the conductive circuit when the conductive circuit provides power for the heating body is R1, the resistance of the heating body is R2, and the conductive circuit is configured that the total conductive resistance R1 is reduced so that R2/(R1+R2) is more than or equal to 0.7.

2. The heating assembly of claim 1, wherein the conductive trace further comprises a good conductor film layer having a resistivity less than the resistivity of the first and second wires;

only the surface of the first wire of the first wires and the second wires is provided with the good conductor film layer.

3. The heating assembly of claim 1, wherein the conductive trace further comprises a good conductor film layer having a resistivity less than the resistivity of the first and second wires;

the surfaces of the first wire and the second wire are provided with the good conductor film layer, and the thickness of the good conductor film layer on the surface of the first wire is larger than that of the good conductor film layer on the surface of the first wire.

4. The heating assembly of claim 2, wherein the thickness of the good conductor film layer is greater than 1 μm.

5. The heating assembly of claim 1, wherein the conductive trace further comprises a good conductor lead having a resistivity less than the resistivity of the first and second wires;

at least the first wire of the first wire and the second wire is provided with the good conductor lead and is accompanied with the good conductor lead, and the head end and the tail end of the good conductor lead are respectively and electrically connected with the head end and the tail end of the wire accompanied with the good conductor lead.

6. The heating assembly of claim 1, wherein at least the first wire of the first wire and the second wire has a diameter of 0.3mm to 0.8mm.

7. The heating assembly of claim 1, wherein the diameter of the first wire is greater than the diameter of the second wire.

8. The heating assembly of any of claims 1-7, wherein a length of the first wire is less than a length of the second wire; or alternatively

The length of the first wire is greater than the length of the second wire.

9. The heating assembly of claim 8, wherein said heating body has terminals at opposite ends thereof for electrically connecting said first and second wires, respectively, said terminals being offset in a longitudinal direction of said aerosol-generating article, a difference in length between said second and first wires being greater than or equal to a longitudinal spacing of said terminals.

10. An aerosol generating device comprising the heating assembly of any of claims 1-9, further comprising a power assembly connecting the first wire and the second wire;

wherein the power supply assembly is configured to supply the heating body with electric power for heating through the conductive line, while the power supply assembly is configured to acquire a potential difference of a loop including the first wire and the second wire, and the power supply assembly supplies the electric power and acquires the potential difference are not performed simultaneously.

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