Heating assembly and aerosol product

Abstract

The invention provides a heating assembly and an aerosol product, the heating assembly comprises a heating element and a base, one end of the heating element is fixed on the base, and the base contains flavor substances; the heating element comprises a first heating body and a second heating body, one end of the second heating body is connected with the first heating body, and the other end of the second heating body is fixed on the base; and the temperature of the first heating body is higher than that of the second heating body after heating. The heating assembly omits a filter tip, and the base not only can fix the heating element, but also can be used as a carrier of flavor substances; the heating element is provided with a first heating body and a second heating body which are different in heating temperature, the first heating body is used for heating the aerosol generating substrate, the second heating body is used for heating the base, and the temperature of the second heating body is lower than that of the first heating body so as to promote slow release of flavor substances, so that the flavor before and after smoking is close to each other.

Description

Technical Field

[0001] This invention relates to the field of aerosol generation technology, and in particular to a heating component and an aerosol product. Background Technology

[0002] In the field of novel heated tobacco products, existing aerosol products are made in a cigarette-like form and placed inside a heating device. The two are used together to achieve aerosol conversion. The auxiliary aroma substances (flavorings) added to the aerosol products are similar to those in traditional cigarettes, typically placed in the filter or tobacco material. During use, the heating device continuously heats the entire tobacco material in the aerosol product. Even with the same parameters as traditional cigarettes, aerosol products absorb more heat and have a higher overall temperature. The flavorings in the aerosol product, whether in the filter or the tobacco material, are at a higher temperature than in traditional cigarettes. Therefore, the flavorings are released rapidly, resulting in an inconsistent taste before and after the aerosol is produced. Summary of the Invention

[0003] This invention provides a heating element and an aerosol product to solve the technical problem in the prior art where the rapid release of flavorings in aerosol products leads to inconsistent taste before and after processing.

[0004] To achieve the above objectives, the technical solution provided by the present invention is as follows: In a first aspect, the present invention provides a heating assembly, including a heating element and a base, one end of the heating element being fixed to the base, the base containing a flavoring substance; the heating element including a first heating element and a second heating element, one end of the second heating element being connected to the first heating element, and the other end being fixed to the base; after heating, the temperature of the first heating element is higher than the temperature of the second heating element.

[0005] Furthermore, the resistivity of the first heating element is greater than that of the second heating element.

[0006] Furthermore, the material of the first heating element is selected from one or more of nickel-chromium alloy, iron-chromium-aluminum alloy, and stainless steel.

[0007] Furthermore, the material of the second heating element is selected from one or more of nickel, nickel-plated copper, silver-plated copper, gold-plated copper, gold-plated nickel, and silver-plated nickel.

[0008] Furthermore, the temperature coefficient of resistance of the first heating element is greater than that of the second heating element.

[0009] Furthermore, the first heating element and the second heating element are made of the same material, and the cross-sectional area of ​​the first heating element is smaller than that of the second heating element.

[0010] Furthermore, the length of the first heating element is greater than the length of the second heating element.

[0011] Furthermore, the second heating element is sheet-shaped and bent to form a groove, and the end of the first heating element extends into the groove and is fixed therein.

[0012] Furthermore, the second heating element is columnar and has a groove, and the end of the first heating element extends into the groove and is fixed therein.

[0013] Furthermore, the contact angle of the solution containing the flavor substance on the base is less than 90°.

[0014] Furthermore, the base is selected from one or more of fibrous materials, plastic parts, and ceramic parts, and micropores are formed on the base to adsorb the flavor substances.

[0015] Furthermore, the base comprises tobacco material.

[0016] In a second aspect, the present invention provides an aerosol product comprising an aerosol generating matrix and the above-described heating component, wherein the aerosol generating matrix is ​​disposed on both sides of the first heating element.

[0017] Furthermore, the aerosol product also includes a packaging body, which wraps around the aerosol generating matrix and the heating component. A channel is formed on the base, which communicates with the gap in the aerosol generating matrix. The two ends of the packaging body are opened or closed to allow the channel and the aerosol generating matrix to communicate with or be isolated from the outside.

[0018] The heating element provided by this invention eliminates the need for a filter. The base not only fixes the heating element but also serves as a carrier for flavor substances. The heating element is equipped with a first heating element and a second heating element, which have different temperatures during heating. The first heating element is used to heat the aerosol-generating matrix, while the second heating element is used to heat the base. The temperature of the second heating element is lower than that of the first heating element to promote the slow release of flavor substances, thereby ensuring that the flavor is similar before and after inhalation. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of the heating component provided in the embodiments of this application; Figure 2 This is a schematic diagram of the structure of the first heating element in the heating assembly provided in the embodiments of this application; Figure 3 This is another structural schematic diagram of the first heating element in the heating assembly provided in the embodiments of this application; Figure 4 This is another structural schematic diagram of the first heating element in the heating assembly provided in the embodiments of this application; Figure 5 for Figure 1 A schematic diagram showing a connection relationship between the first heating element and the second heating element; Figure 6 for Figure 1 Another schematic diagram showing the connection relationship between the first heating element and the second heating element; Figure 7 for Figure 1 A schematic diagram showing the connection relationship between the first heating element and the second heating element. Figure 8 This is a schematic diagram of the structure of the aerosol product provided in the embodiments of this application; Figure 9 for Figure 8 A sectional view.

[0021] Figure label: 10. Base; 20. First heating element; 30. Second heating element; 31. Groove; 32. Cut groove; 40. Aerosol generating matrix; 50. Packaging body. Detailed Implementation

[0022] To enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0023] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly set on the other component; when a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to the other component.

[0024] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0025] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "a plurality of" or "several" means two or more, unless otherwise explicitly specified.

[0026] It should be noted that the structures, proportions, sizes, etc., shown in the accompanying drawings of this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the conditions under which this application can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size should still fall within the scope of the technical content disclosed in this application, provided that they do not affect the effects and purposes that this application can produce.

[0027] Reference Figure 1 As shown, in a first aspect of this application, a heating assembly is provided, including a heating element and a base 10. One end of the heating element is fixed to the base 10, and the base 10 contains a flavoring substance. The heating element includes a first heating element 20 and a second heating element 30. One end of the second heating element 30 is connected to the first heating element 20, and the other end is fixed to the base 10. After heating, the temperature of the first heating element 20 is higher than the temperature of the second heating element 30.

[0028] In this embodiment, the base 10 contains a flavoring substance that is released when heated and inhaled into the user's mouth along with the smoke. The flavoring substance may be selected from one or more of vanillin, maltol, and ethyl acetate. The release temperature of the flavoring substance is generally between 65°C and 280°C.

[0029] In an aerosol product, one end of a second heating element 30 is fixed to a base 10. When an external power supply is connected, it can be heated up and transfer the heat to the base 10, so that the flavor substances in the base 10 are released. A first heating element 20 is used to heat an aerosol-forming substrate 40. When heating, the temperature of the first heating element 20 is higher than that of the second heating element 30 to respectively adapt to the aerosol-forming substrate 40 and the release of flavor substances, and make the release time of flavor substances longer than the release time of aerosol, so as to achieve consistent puffing flavors in each puff during the complete release cycle of the whole aerosol product. Taking tobacco as an example, the heating temperature of the first heating element 20 is usually less than 550°C, preferably 220°C - 350°C, and the heating temperature of the second heating element 30 needs to be between 75°C and 200°C.

[0030] In an embodiment of the present application, the first heating element 20 is set as a planar metal sheet, and a part of it is hollowed out to form a serpentine continuum, referring to Figure 2 ; alternatively, the first heating element 20 can be hollowed out into regularly arrayed strip shapes, but an equal-width connecting bridge is reserved between each adjacent strip-shaped structure, referring to Figure 3 ; or the first heating element 20 can be hollowed out into a regularly arranged "hui" - shaped structure, and adjacent two "hui" - shaped structures are connected, referring to Figure 4 . The hollowing of the first heating element 20 can be obtained through various processes, such as laser cutting, etching and other methods.

[0031] The manufacturing steps of the heating element include: 1. Calculate the unfolded length and line width of the target resistance value required according to the resistivity of 0.1 - mm - thick iron - chromium - aluminum, and draw a design drawing after estimating the preparation process (laser cutting or etching, etching is selected in this embodiment). If etching is selected, etching compensation must be considered when designing the lines, and the minimum line width is greater than 0.15 - 0.2 mm to prevent wire breakage when passing current. Micro - connection points should be designed at the hollowed - out places of the designed serpentine or "hui" - shaped structure to prevent the parts from being completely separated or falling off during the etching process. All sharp corners should be designed with rounded corners greater than R0.05 mm to prevent the accumulation of chemical solution at the sharp corners and resulting in corrosion and breakage.

[0032] 2. Make a film: Output the design drawing file as a black - and - white film, where black represents the reserved part (resistance), and white represents the hollowed - out part.

[0033] 3. Cut the material and perform pre - treatment: Cut the large roll of 0.1 - mm - thick iron - chromium - aluminum tape into a size suitable for the etching machine table, such as 300 * 300 mm, and then use an alkaline cleaning agent to thoroughly remove the rolling oil and dust on the metal surface to ensure that the subsequent photosensitive glue can firmly adhere.

[0034] 4. Coat the photosensitive glue: In a clean environment, evenly coat a layer of photosensitive anti - etching ink on both sides of the iron - chromium - aluminum sheet through rollers.

[0035] 5. Exposure: Place the prepared film onto the coated metal sheet and put it into an exposure machine. When exposed to ultraviolet light, the photosensitive emulsion in the black masked area of ​​the film does not react, while the photosensitive emulsion in the white transparent area undergoes a polymerization reaction.

[0036] 6. Development: Use sodium carbonate solution to spray and wash away the unexposed photosensitive emulsion, exposing the underlying iron, chromium, and aluminum metal.

[0037] 7. Etching: The developed iron-chromium-aluminum sheet is placed into an etching machine, and ferric chloride etching solution is sprayed onto the metal surface through a high-pressure nozzle to melt away the exposed metal parts, thereby obtaining the first heating element 20 of the required size.

[0038] 8. Place the prepared nickel sheet of the second heating element 30 into the pre-made jig, place it into the iron-chromium-aluminum resistor obtained in step 7 above, and weld the two together by laser welding or spot welding.

[0039] Place the prepared base 10 into a special positioning fixture, align the heating element with the hole designed on the base 10, and tightly rivet the welding end into the corresponding hole of the base 10, so that the second heating element 30 is held in the area of ​​the base 10, and one end of the base 10 exposes the connection part between the second heating element 30 and the heating appliance.

[0040] In this embodiment, the first heating element 20 and the second heating element 30 can be connected by welding or riveting. When the two are made of different materials, welding is preferred, such as laser welding or spot welding. The welding points are located in the overlapping area of ​​the first heating element 20 and the second heating element 30, and at least two welding points are provided, usually selected on the same side of the first heating element 20 or the second heating element 30. After the welding is completed, a continuous path for current to pass through is formed. In embodiments with more than two welding points, any one welding point forms a continuous path for current to pass through.

[0041] The heating assembly of this embodiment eliminates the filter tip. The base 10 can not only fix the heating element, but also serve as a carrier for flavor substances. The heating element is provided with a first heating element 20 and a second heating element 30, which have different temperatures when heated. The first heating element 20 is used to heat the aerosol generation matrix 40, and the second heating element 30 is used to heat the base 10. The temperature of the second heating element 30 is lower than that of the first heating element 20 to promote the slow release of flavor substances, thereby ensuring that the flavor is similar before and after inhalation.

[0042] In some embodiments, the resistivity of the first heating element 20 is greater than that of the second heating element 30. In this embodiment, the first heating element 20 and the second heating element 30 are made of different materials. When current passes through, the heating element with higher resistivity has greater resistance and generates more heat; the heating element with lower resistivity has lower resistance and generates less heat. The first heating element 20 has a higher resistivity than the second heating element 30, so that when current passes through, the first heating element 20 generates more heat, which is convenient for heating the aerosol generation matrix 40; the heat generated by the second heating element 30 can also meet the requirements for releasing flavor substances.

[0043] Specifically, the material of the first heating element 20 is selected from one or more of nickel-chromium alloy, iron-chromium-aluminum alloy, and stainless steel. The material of the second heating element 30 is selected from one or more of nickel, nickel-plated copper, silver-plated copper, gold-plated copper, gold-plated nickel, and silver-plated nickel.

[0044] In other embodiments, the temperature coefficient of resistance (TCR) of the first heating element 20 is greater than that of the second heating element 30. Most metallic conductors experience a change in resistance as temperature increases when current flows through them, typically showing an increasing trend. The TCR represents the relationship between resistance and temperature change. Since the TCR of the first heating element 20 is greater than that of the second heating element 30, the first heating element 20 experiences a larger change in resistance when current flows through it, while the second heating element 30 experiences a smaller change and has a lower resistance than the first heating element 20. Therefore, as the temperature of the heating element increases, the change in resistance of the second heating element 30 has a relatively smaller impact on the overall resistance change of the heating element. In some specific applications, using the temperature change of the heating element's resistance to monitor temperature can improve the accuracy of monitoring.

[0045] In some embodiments, the first heating element 20 and the second heating element 30 are made of the same material, and the cross-sectional area of ​​the first heating element 20 is smaller than that of the second heating element 30. In the embodiments of this application, the heating elements can be made of the same material, but with different cross-sectional areas. Since the larger the cross-sectional area of ​​the heating element is, the lower the resistance value is when the material is the same, the first heating element 20 uses a smaller cross-sectional area, and the second heating element 30 uses a larger cross-sectional area to increase the resistance difference between the two parts of the heating element. In practical embodiments, to comprehensively consider cost and ease of manufacturing process, the first heating element 20 and the second heating element 30 each use a uniform wall thickness, so different cross-sectional areas can be achieved by setting different widths, that is, the width of the second heating element 30 is greater than the width of the first part.

[0046] Furthermore, the length of the first heating element 20 is set to be greater than that of the second heating element 30. With the increased length of the second heating element 30, the temperature of the second heating element 30 decreases while the target heating temperature of the first heating element 20 remains unchanged. This results in a lower resistance for the second heating element 30, allowing the temperature of the first heating element 20 to be higher than that of the second heating element 30 when current flows through it. Specifically, the first heating element 20 is preferably a metal sheet with a thickness of 0.03mm to 0.15mm, a length between 15mm and 30mm, and a width between 10mm and 35mm; the length of the second heating element 30 is preferably set to 5mm to 15mm, and its thickness and width can be the same as or different from those of the first heating element 20.

[0047] In some embodiments, the second heating element 30 is sheet-shaped and bent to form a groove 31, and the end of the first heating element 20 extends into the groove 31 and is fixed therein. In the embodiments of this application, the second heating element 30 may be formed by partially bending a thin metal sheet to form the aforementioned groove 31, and the end of the first heating element 20 extends into the groove 31 for positioning, thereby facilitating precise alignment and consistency during welding. (Refer to...) Figure 5 .

[0048] In other embodiments, the second heating element 30 is columnar and has a groove 32 formed therein, and the end of the first heating element 20 extends into and is fixed within the groove 32. (See reference...) Figure 6 A groove 32 is provided at one end of the columnar second heating element 30, and the first heating element 20 extends into the groove 32 for welding to achieve consistency. In other embodiments, the second heating element 30 and the first heating element 20 are integral structures, as shown in the reference. Figure 7 .

[0049] In some embodiments, the contact angle of the solution containing flavor substances with the base 10 is less than 90°. In the embodiments of this application, in addition to having a certain strength, the base 10 also needs to be hydrophilic to adsorb and store flavor substances such as fragrances. Its hydrophilicity needs to ensure that the contact angle of the surface with the solution containing the aforementioned flavor substances is less than 90°, preferably less than or equal to 30°.

[0050] In other embodiments, the base 10 comprises tobacco material. In the embodiments of this application, the material of the base 10 includes polymers, fibers, preferably tobacco material or tobacco-related materials. Edible glue may be added if necessary to allow the base 10 to be molded into a specific shape, so that it can form structural features such as holes, bosses, and grooves 31.

[0051] Specifically, the raw materials of the base 10 may include the following components by weight percentage: 50%–55% tobacco material, 22%–25% modified phenolic resin, 8%–10% porous silica, 2%–5% chopped glass fiber, and 5%–10% functional additives. The base 10 allows the flavor material to be slowly released under the action of a heating element connected to one end, compensating for the defect of explosive release in the first few puffs after heating the aerosol generating matrix 40 at the front end of the heating element, resulting in a more uniform release of flavor in the aerosol product before and after inhalation, thus enhancing the inhalation experience.

[0052] In a second aspect of this application, an aerosol article is provided, including an aerosol generating matrix 40 and the above-mentioned heating component, wherein the aerosol generating matrix 40 is respectively disposed on both sides of the first heating element 20.

[0053] In the embodiments of this application, reference is made to Figure 8 , Figure 9 The aerosol generating matrix 40 can be solid tobacco or a mixture of solid tobacco and liquid tobacco extract. When the embodiment of this application uses a mixture of solid tobacco and liquid tobacco extract, the base 10 is set to be in an unsaturated adsorption state after the addition of flavor substances. The base 10 is sufficient to adsorb the liquid leakage caused by gravity during the conversion of the solid-liquid mixture by the first heating element 20, and the heat generated by the second heating element 30 is used for secondary aerosol conversion.

[0054] In some embodiments, the aerosol product further includes a packaging body 50, which wraps around the aerosol generating matrix 40 and the heating element. A channel is formed on the base 10, which communicates with the gap in the aerosol generating matrix 40. The two ends of the packaging body 50 are opened or closed to allow the channel and the aerosol generating matrix 40 to communicate with or be isolated from the outside.

[0055] Reference Figure 8 , Figure 9 The aerosol product of this application embodiment has a packaging body 50 surrounding the aerosol generating matrix 40 and the heating unit. Both ends of the packaging body 50 can be opened or closed. During storage, both ends of the packaging body 50 are closed to isolate the internal aerosol generating matrix 40 from the outside environment, preventing it from absorbing moisture from the air. During use, both ends of the packaging body 50 are opened, allowing the air inlet and outlet to connect with the outside environment. This allows gas to enter the packaging body 50 through the air inlet during suction, pass through the channel and the gaps in the aerosol generating matrix 40, and then enter the body through the air outlet. This structural design of the aerosol generating device prevents it from absorbing moisture from the air when not in use for extended periods, thus preserving the original taste of the aerosol product.

[0056] The aerosol product of this application embodiment is used in conjunction with a heating device. The heating device includes a power supply, a control section, electrodes connected to the control section, an input / output section, a housing, and a receiving cavity disposed on the housing for holding the aerosol product. The receiving cavity consists of the housing and a nozzle, which can be regarded as an extension of the housing. The nozzle is assembled and detached from the housing, and the two parts are connected by magnets, snap-fits, or other means.

[0057] After separating the nozzle from the heating device, remove the removable parts of the packaging bodies 50 at both ends of the aerosol product. Place the heating element base 10 into the receiving cavity with the end facing it. Then connect the nozzle to the housing. The second heating element 30 of the aerosol product is electrically connected to the electrodes of the heating device. Send an input command to the heating device, and the control unit drives the power supply to convert electrical energy into heat energy generated by the heating element, converting the aerosol product into an aerosol. The aerosol is then suctioned out through the nozzle.

[0058] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A heating element, characterized in that: The device includes a heating element and a base. One end of the heating element is fixed to the base, and the base contains a flavoring substance. The heating element includes a first heating element and a second heating element. One end of the second heating element is connected to the first heating element, and the other end is fixed to the base. After heating, the temperature of the first heating element is higher than the temperature of the second heating element.

2. The heating component according to claim 1, characterized in that, The resistivity of the first heating element is greater than that of the second heating element.

3. The heating component according to claim 2, characterized in that, The material of the first heating element is selected from one or more of nickel-chromium alloy, iron-chromium-aluminum alloy, and stainless steel; and / or, The material of the second heating element is selected from one or more of nickel, nickel-plated copper, silver-plated copper, gold-plated copper, gold-plated nickel, and silver-plated nickel.

4. The heating component according to claim 1, characterized in that, The temperature coefficient of resistance of the first heating element is greater than that of the second heating element.

5. The heating component according to claim 1, characterized in that, The first heating element and the second heating element are made of the same material, and the cross-sectional area of ​​the first heating element is smaller than that of the second heating element.

6. The heating component according to claim 5, characterized in that, The length of the first heating element is greater than the length of the second heating element.

7. The heating component according to any one of claims 1 to 6, characterized in that, The second heating element is sheet-shaped and bent to form a groove, and the end of the first heating element extends into the groove and is fixed.

8. The heating component according to any one of claims 1 to 6, characterized in that, The second heating element is columnar and has a groove, and the end of the first heating element extends into the groove and is fixed.

9. The heating component according to any one of claims 1 to 6, characterized in that, The contact angle of the solution containing the flavor substance on the base is less than 90°.

10. The heating component according to any one of claims 1 to 6, characterized in that, The base is selected from one or more of fibrous materials, plastic parts, and ceramic parts, and micropores are formed on the base to adsorb the flavor substances.

11. The heating component according to any one of claims 1 to 6, characterized in that, The base comprises tobacco material.

12. An aerosol product, characterized in that, The invention includes an aerosol generating matrix and a heating component as described in any one of claims 1 to 11, wherein the aerosol generating matrix is ​​disposed on both sides of the first heating element.

13. The aerosol product according to claim 12, characterized in that, The aerosol product also includes a packaging body, which wraps around the aerosol generating matrix and the heating component. A channel is formed on the base, which communicates with the gap in the aerosol generating matrix. The two ends of the packaging body are opened or closed to allow the channel and the aerosol generating matrix to communicate with or be isolated from the outside.

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